10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

_______________

Form 10-K

þ	ANNUAL REPORT PURSUANT TO SECTION 13OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the fiscal year ended December 31, 2012
	or
o	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Commission File Number 1-2328

_______________

GATX Corporation

(Exact name of registrant as specified in its charter)

New York	36-1124040
(State of incorporation)	(I.R.S. Employer Identification No.)

222 West Adams Street

Chicago, IL 60606-5314

(Address of principal executive offices, including zip code)

(312) 621-6200

(Registrant’s telephone number, including area code)

Securities Registered Pursuant to Section 12(b) of the Act:

Title of each class or series	Name of each exchange    on which registered
Common Stock	New York Stock Exchange Chicago Stock Exchange
$2.50 Cumulative Convertible Preferred Stock, Series A	New York Stock Exchange Chicago Stock Exchange
$2.50 Cumulative Convertible Preferred Stock, Series B	New York Stock Exchange Chicago Stock Exchange

Securities Registered Pursuant to Section 12(g) of the Act:

None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.  Yes þ     No o

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act.  Yes o     No þ

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15 (d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  Yes þ     No o

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§229.405) is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K.  þ

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes þ  No ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer”, “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

þ Large accelerated filer     o Accelerated filer     o Non-accelerated filer o Smaller reporting company

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).  Yes o     No þ

The aggregate market value of the voting stock held by non-affiliates of the registrant was approximately $1.8 billion as of June 30, 2012.

As of January 31, 2013, 47.0 million common shares were outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

GATX’s definitive Proxy Statement to be filed on or about March 15, 2013 PART III

GATX CORPORATION

2012 FORM 10-K

INDEX

Item No.		Page No.
Part I
Item 1.	Business	2
Item 1A.	Risk Factors	12
Item 1B.	Unresolved Staff Comments	18
Item 2.	Properties	19
Item 3.	Legal Proceedings	19
Item 4.	Mine Safety Disclosure	19
Part II
Item 5.	Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	20
Item 6.	Selected Financial Data	22
Item 7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	23
	Discussion of Operating Results	24
	Balance Sheet Discussion	40
	Cash Flow Discussion	43
	Liquidity and Capital Resources	45
	Critical Accounting Policies and Estimates	49
	New Accounting Pronouncements	51
	Non-GAAP Financial Measures	51
Item 7A.	Quantitative and Qualitative Disclosures About Market Risk	53
Item 8.	Financial Statements and Supplementary Data	55
Item 9.	Changes in and Disagreements With Accountants on Accounting and Financial Disclosure	99
Item 9A.	Controls and Procedures	99
Item 9B.	Other Information	101
Part III
Item 10.	Directors, Executive Officers and Corporate Governance	101
Item 11.	Executive Compensation	101
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	101
Item 13.	Certain Relationships and Related Transactions, and Director Independence	102
Item 14.	Principal Accountant Fees and Services	102
Part IV
Item 15.	Exhibits and Financial Statement Schedules	102
	Signatures	103
	Schedules	104
	Exhibits	108

1

PART I

Item 1. Business

GENERAL

Headquartered in Chicago, Illinois, GATX Corporation (“GATX” or the “Company”) leases, operates, manages and remarkets long-lived, widely-used assets, primarily in the rail and marine markets. GATX also invests in joint ventures that complement existing business activities. In 2012, the Company modified the composition of its reportable segments to reflect an increasing focus on international growth and related changes in its management structure. As a result, the Company now reports financial results through fourprimary business segments: Rail North America, Rail International, American Steamship Company (“ASC”) and Portfolio Management. All segment information is presented on this basis.

The following description of GATX’s business should be read in conjunction with the information contained in Management’s Discussion and Analysis of Financial Condition and Results of Operations included in Item 7 and the consolidated financial statements included in Item 8 of this Annual Report on Form 10-K. For geographic and financial information relating to each of our reportable segments, see Notes 21 and 23 to the consolidated financial statements.

At December 31, 2012, GATX had total assets of $6.9 billion, comprised largely of railcars, marine vessels and joint venture investments. This amount included $0.9 billion of off balance sheet assets, primarily railcars, that were financed with operating leases and therefore were not recorded on the balance sheet.

OPERATIONS

GATX RAIL BUSINESS OVERVIEW

GATX and its rail affiliates lease tank cars, freight cars and locomotives in North America, Europe and India. GATX is also exploring rail leasing opportunities in Russia and China through wholly-owned subsidiaries as well as joint venture arrangements. GATX's wholly-owned fleet consists of approximately 131,000 railcars and 561 locomotives with an aggregate net book value of $5.1 billion (including off balance sheet assets) as of December 31, 2012. GATX's rail fleet is one of the largest privately-owned railcar fleets in the world, and with over a century of rail industry experience, GATX offers customers financial, asset, maintenance, and management expertise. GATX also has an ownership interest in approximately 30,000 railcars through investments in affiliated companies. Affiliate fleets consist primarily of freight and intermodal railcars. In addition, GATX actively manages fleets for an affiliate and other third-party owners of approximately 5,200 railcars and utilizes its extensive rail asset knowledge and experience to remarket both wholly-owned and managed rail assets. The following table sets forth GATX’s worldwide rail fleet data as of December 31, 2012:

	Tank Railcars	Freight Railcars	Total Fleet	Affiliate Railcars	Managed Railcars	Total Railcars	Locomotives
North America	57,781	51,770	109,551	6,031	1,113	116,695	561
International	20,397	1,443	21,840	24,444	15	46,299	—
	78,178	53,213	131,391	30,475	1,128	162,994	561

2

GATX's rail customers primarily operate in the chemical, petroleum, food/agriculture and transportation industries. GATX's worldwide railcar fleet consists of a diverse selection of railcar types that are used by its customers to ship approximately 700 different commodities. The following table provides information on some of the major railcar types that GATX leases to its rail customers and the primary commodities shipped in these railcars.

	General Service Tank Cars	High Pressure Tank Cars	Specialty & Acid Tank Cars	Specialty Covered Hoppers	Gravity Covered  Hoppers	Open Top Cars
	Chemical	Chemical	Chemical	Plastics	Agriculture	Energy
	Petroleum	Petroleum	Petroleum	Food	Industrial	Construction
	Food			Industrial	Energy	Steel
	Agriculture			Energy	Construction	Waste/Recycling
	Construction					Forest Products
	Biofuels	Liquefied Petroleum Gas (LPG)	Acids (Sulfuric, Hydrochloric, Phosphoric, Acetic, Nitric, etc.)	High Density Polyethylene (PE)	Grain Products	Coal
	Fertilizers and Fertilizer Ingredients	Vinyl Chloride Monomer (VCM)	Coal Tar Pitch	Polyethylene Terephthalate (PET)	Solid Fertilizer	Coke (Petroleum and Metallurgical)
	Lubricating Oils	Propylene	Dyes, Inks	Polypropylene	Sand	Taconite
	Edible Oils and Syrups		Hydrogen Peroxide	Polyvinyl Chloride	Cement	Aggregates
	Asphalt		Caprolactam	Sugar	Fly Ash	Woodchips
	Fuel Oil			Flour	Roofing Granules	Industrial Minerals
	Crude Oil			Cement	Minerals	Scrap Metal
	Chemicals (Sodium Hydroxide, Styrene, etc.)			Fly Ash		Solid Waste

3

RAIL NORTH AMERICA

Rail North America is comprised of GATX's wholly-owned operations in the United States, Canada and Mexico, as well as two affiliate investments. Rail North America primarily provides railcars pursuant to full-service leases under which it maintains the railcars, pays ad valorem taxes and insurance and provides other ancillary services. These railcars have estimated useful lives of 30 to 38 years and an average age of approximately 16 years. Rail North America has a large and diverse customer base, serving approximately 700 customers. In 2012, no single customer accounted for more than 5% of Rail North America’s total lease income, and the top ten customers combined accounted for approximately 24% of Rail North America’s total lease income. Rail North America leases new railcars for terms that generally range from one to ten or more years, with renewals of existing leases and assignments generally ranging from three to ten years. The average remaining lease term of the North American fleet was approximately four years as of December 31, 2012. Rail North America’s primary competitors are Union Tank Car Company, General Electric Railcar Services Corporation, American Railcar Leasing, Trinity Leasing, CIT Group Inc., and First Union Rail. Rail North America competes on the basis of customer relationships, lease rate, maintenance expertise, service capability and availability of railcars.

Rail North America purchases new railcars from a number of manufacturers, including Trinity Industries, American Railcar Industries, Inc., National Steel Car Ltd., and The Greenbrier Companies. In 2011, GATX entered into an agreement to acquire 12,500 newly built railcars from Trinity Industries that are delivering ratably over a five-year period. As of December 31, 2012, approximately 9,300 railcars remain to be delivered under the agreement. In addition, GATX acquires portfolios or fleets of railcars in the secondary market.

Rail North America also includes a locomotive leasing business, which consisted of 514 four-axle and 47 six-axle locomotives at December 31, 2012. Four-axle locomotives continue to be in demand by railroads and shippers despite not having been manufactured in any material quantity since the mid-1980s. The four-axle fleet, with periodic refurbishment, is expected to continue to be marketable and yield attractive returns. Locomotive customers are primarily Class I, regional and short-line railroads and industrial users. Leases are typically net leases with terms that vary from month-to-month to 15 years. As of December 31, 2012, the average remaining lease term of the locomotive fleet was 22 months. Rail North America's primary competitors in locomotive leasing are Helm Financial Corporation, CIT Group, Inc., and Progress Rail Services Corporation. Competitive factors in the market include equipment condition, availability, customer service and pricing.

Rail North America also selectively remarkets rail assets, including assets managed for third parties and certain affiliates. Remarketing activities often generate fees and gains from these asset sales, which contribute significantly to Rail North America’s segment profit.

Maintenance

Rail North America operates an extensive network of service facilities in the United States and Canada that perform repair, maintenance, modification and regulatory compliance work on the railcar fleet. The maintenance network is dedicated to performing timely, efficient and high quality repair services in order to keep railcars in service for customers throughout the lease term and the useful life of the asset. Maintenance services include interior cleaning of railcars, general repairs to the car body and safety appliances, regulatory compliance work, wheelset replacements, exterior blast and painting, and car stenciling. To the extent possible, railcar maintenance is scheduled in a manner that minimizes the amount of time the car is out of service. Rail North America’s maintenance network consists of:

• Six major service centers that can complete virtually any repair or modification project.

• Two field repair centers that can perform most repair and maintenance activities.

• Six customer-dedicated sites operating solely within specific customer facilities that offer services tailored to the needs of the particular customers’ fleets.

• Three “Fast Track” locations in the United States that are smaller in size and scale than major service centers and primarily focus on routine cleaning, repair and regulatory compliance services.

• Twenty mobile repair units that are able to travel to many track-side field locations and provide spot repairs and interior cleaning services, avoiding the need to otherwise shop a railcar.

4

The maintenance network is supplemented by a number of preferred third-party service centers. In certain cases, GATX has entered into fixed-capacity contracts with these service centers under which Rail North America has secured access to repair capacity. In 2012, third-party service centers accounted for approximately 39% of Rail North America’s service center maintenance costs (excluding the cost of repairs performed by railroads).

In 2012, wholly-owned and third party service centers performed an aggregate of approximately 82,000 service events, including multiple independent service events for the same car.

Affiliates

Adler Funding LLC ("Adler") is a 12.5%-owned joint venture that was formed in 2010 as a railcar leasing partnership with UniCredit Bank AG, Sperber Rail Holdings Inc., and LBT Holding Corporation. Rail North America provides lease, maintenance and asset remarketing services to Adler, for which it receives a base service fee and a performance-based asset remarketing fee. As of December 31, 2012, Adler owned approximately 4,100 railcars in North America consisting primarily of general purpose freight cars with an average age of approximately nine years.

Southern Capital Corporation LLC (“SCC”) is a 50%-owned joint venture with the Kansas City Southern Railroad (“KCSR”). SCC was formed in 1996 and controls approximately 2,000 freight cars and 48 locomotives, all of which are on lease to KCSR.

RAIL INTERNATIONAL

Rail International is comprised of GATX's wholly-owned European operations ("Rail Europe") and its newly established railcar leasing business in India ("Rail India"), as well as two affiliate investments. Rail Europe leases railcars, predominantly tank cars to customers throughout Europe pursuant to full-service leases under which it maintains the railcars and provides insurance and other ancillary services. These railcars have estimated useful lives of 30 to 38 years and an average age of approximately 22 years. Rail Europe has a diverse customer base with over 200 customers. In 2012, two customers each accounted for more than 10% of Rail Europe's total lease income and the top ten customers combined accounted for approximately 60% of Rail Europe's total lease income. Rail Europe's lease terms generally range from one to seven years and at December 31, 2012, the average remaining lease term of the European fleet was approximately two years. Rail Europe principally competes on the basis of customer relationships, lease rate, maintenance expertise, service capacity and availability of railcars. Its primary competitors are VTG Aktiengesellschaft, the Ermewa Group and Nacco.

Rail Europe acquires new railcars primarily from Astra Rail Industries S.R.L. and VRZ Karlovo. Additionally, Rail Europe's Ostróda, Poland maintenance facility assembles several hundred Rail Europe tank cars each year. As of December 31, 2012, Rail Europe has commitments to acquire 1,500 newly manufactured railcars to be delivered in 2013 and 2014. Commitments to purchase an additional 2,000 new railcars through 2015 exist but are subject to cancellation provisions at Rail Europe's discretion.

Rail India began operations in 2012 and was the first leasing company registered under the Indian Railways Wagon Leasing Scheme. Rail India took delivery of its first 46 newly manufactured flat wagon railcars in December 2012. In 2013, Rail India will focus on pursuing further investment opportunities in new and existing flat wagons, and developing relationships with customer and suppliers as well as with the Indian Railways.

Maintenance

Rail Europe operates service centers in Hannover, Germany and Ostróda, Poland that perform significant repairs, regulatory compliance and modernization work for owned railcars. These service centers are supplemented by a number of third-party repair facilities, which in 2012 accounted for approximately 52% of Rail Europe's fleet repair costs.

In India, all maintenance of railcars is performed by the Indian Railways or by a third party service provider retained by the Indian Railways.

5

Rail International Affiliates

AAE Cargo AG (“AAE”) is a 37.5% owned Switzerland-based railcar lessor that, as of December 31, 2012, owned approximately 24,500 freight cars, comprised of 60% intermodal cars, 15% covered cars and 25% other freight car types, with an average age of 13 years. AAE’s customer base consists of various railways throughout Europe as well as private operators. As of December 31, 2012, the average remaining lease term of AAE railcars was approximately two years.

In 2012, IMC-GATX Financial Leasing (Shanghai) Co., Ltd. (“IMC-GATX China”) was established as a 50% owned China-based joint venture between GATX and IMC Pan Asia Alliance Group (“IMC”). IMC is a well-established shipping enterprise with experience operating in China and is also a partner with GATX in a marine joint venture. The primary objective of IMC-GATX China is to establish a rail leasing business in China, if that market develops. IMC-GATX China may also pursue non-rail leasing opportunities.

ASC

ASC operates the largest fleet of U.S. flagged vessels on the Great Lakes, providing waterborne transportation of dry bulk commodities such as iron ore, coal, limestone aggregates and metallurgical limestone. End markets for these commodities include domestic automobile manufacturing, electricity generation and non-residential construction.Customer service, primarily in the form of scheduling flexibility, reliability and operating safety, is the key to ASC’s success. ASC’s sailing season generally runs from April 1 through December 31; however, depending on customer demand and weather conditions, certain vessels may commence operations during March and continue to operate into January of the following year.

At December 31, 2012, ASC’s fleet consisted of 18 vessels with a net book value of $305.2 million, including $21.0 million of off balance sheet assets. Fourteen of the vessels are diesel powered, have an average age of 35 years and estimated useful lives of 65 years. The length of the diesel vessels ranges from 635 to 1,004 feet and they have maximum load capacities between 23,800 and 80,900 gross tons. Three steam powered vessels were built in the 1940s and 1950s and have estimated remaining useful lives of seven years. The length of the steamer vessels ranges from 690 to 767 feet and they have maximum load capacities between 22,300 and 26,300 gross tons. The other vessel in ASC's fleet is a newly manufactured articulated tug-barge, which is leased in under an operating lease that expires in 2018. The tug is diesel powered and the barge is 740 feet in length with a carrying capacity of 34,000 gross tons. Seventeen of ASC’s vessels are generally available for both service contract and spot business, while one vessel has dedicated service under a time charter agreement that is scheduled to expire in 2015. ASC’s vessels operate exclusively in the fresh water conditions of the Great Lakes and as a result, with proper maintenance and periodic refurbishment, may achieve extended service well beyond the useful life estimates.

All of ASC’s vessels are equipped with self-unloading equipment, enabling them to discharge dry bulk cargo without assistance from shore-side equipment or personnel. This equipment enables the vessels to operate twenty-four hours a day, seven days a week. ASC’s vessels are capable of transporting and unloading almost any free flowing, dry bulk commodity. In 2012, ASC served 20 customers with the top five customers comprising 84% of ASC’s total revenue.

ASC’s vessels operate pursuant to customer contracts that stipulate committed freight volume each year that may be supplemented with additional spot volume opportunities. In 2012, ASC operated 14 vessels and carried 29.7 million net tons of cargo. ASC has a relatively stable customer portfolio that includes a mix of companies in the steel production, electric utility and construction industries. The number of vessels deployed by ASC in any given year is dependent on customer volume requirements. In response to demand, ASC may choose not to operate certain vessels.

6

ASC’s primary competitors on the Great Lakes are Interlake Steamship Company, VanEnkevort Tug and Barge, Grand River Navigation, and Great Lakes Fleet, Inc. ASC principally competes on the basis of service capabilities, customer relationships and price.

The United States shipping industry is subject to the Jones Act (the “Act”), which requires all commercial vessels transporting goods between U.S. ports to be built, owned, operated and manned by U.S. citizens and registered under the U.S. flag.

PORTFOLIO MANAGEMENT

Portfolio Management is an aggregation of a group of diversified owned assets and joint venture investments ("affiliates") and provides leasing, asset remarketing and asset management services. Portfolio Management selectively invests in long-lived, widely used assets with a focus on domestic marine and container related equipment and extends its market reach through affiliate investments.

The following table sets forth the approximate net book values of Portfolio Management’s assets as of December 31 (in millions):

	Owned Assets *		Affiliate Investments		Managed Assets
2012	$	419.5	$	377.9	$	143.2
2011	475.0		371.6		166.7
2010	399.3		345.1		204.6

_________

* Includes off balance sheet assets

Owned and Managed Assets

Portfolio Management's wholly-owned portfolio primarily consists of investments in operating assets, finance lease assets and secured loans. Operating and finance lease assets include chemical parcel tankers, shipping containers, inland marine barges, gas compression equipment, biofuel equipment, and other transportation equipment. Operating assets have estimated useful lives of 3 to 30 years. Operating assets are either placed with customers under operating leases, the majority of which expire by 2018, or in the case of certain marine assets, are operated by a service provider under pooling arrangements. Portfolio Management also remarkets assets, generating portfolio proceeds and asset disposition gains and losses.

7

Portfolio Management further leverages its equipment knowledge by managing portfolios of assets for third parties. The majority of these managed assets are in markets where GATX has a high level of expertise. Portfolio Management generates fee and residual sharing income through portfolio administration and remarketing of these assets.

Portfolio Management’s principal competitors are captive leasing companies of equipment manufacturers, leasing subsidiaries of commercial banks and independent leasing companies. Factors that affect Portfolio Management’s ability to compete are equipment expertise, GATX’s relationships, relative cost of funds, and the availability of other financing alternatives to potential customers.

Affiliates

Portfolio Management's investments in affiliated companies primarily include aircraft engine leasing and shipping operations. Portfolio Management invests in joint ventures to expand its presence in key markets, expand geographically and diversify risks. Portfolio Management's joint venture partners are typically well established companies with extensive experience in their respective markets.

The Rolls-Royce & Partners Finance companies (collectively the “RRPF Affiliates”) are a collection of fourteen 50%-owned domestic and foreign joint ventures with Rolls-Royce plc (or affiliates thereof, collectively “Rolls-Royce”), a leading manufacturer of commercial aircraft jet engines. The RRPF Affiliates are primarily engaged in two business activities: lease financing of aircraft engines to a diverse group of commercial aircraft operators worldwide and sale-leaseback financing of aircraft engines to Rolls-Royce for use in their engine maintenance programs. As of December 31, 2012, the RRPF Affiliates, in aggregate, owned 402 engines, of which 176 were on lease to Rolls-Royce. These aircraft engines are generally depreciated over a useful life of 25 years when new and, depending on actual hours of usage and with proper maintenance, may achieve extended service well beyond the useful life estimate. As of December 31, 2012, the average age of these engines was approximately 9 years. Lease terms vary but typically range from 7 to 10 years. Rolls-Royce acts as manager for each of the RRPF Affiliates and also performs substantially all required maintenance activities.

Cardinal Marine Investments LLC (“Cardinal Marine”) is a 50%-owned marine joint venture with IMC Holdings, a subsidiary of IMC. IMC is a leading Asia-focused integrated maritime and industrial solutions provider with diversified interests in dry and liquid bulk shipping, ship and crew management, offshore and marine engineering, oil and gas assets, and services and logistics. Cardinal Marine owns six chemical parcel tankers (each with 45,000 dead weight tons (“dwt”) carrying capacity) that operate under a pooling arrangement with IMC's other chemical tankers in support of the movement of liquid bulk chemicals in the Middle East Gulf/Far East and U.S. Gulf/Far East trades.

Somargas II Private Limited (“Somargas”) and Singco Gas Pte, Limited (“Singco”), respectively, are 35% and 50%-owned joint ventures with IM Skaugen ASA (“Skaugen”). Skaugen is a 96-year old Norwegian company that operates a fleet of approximately 40 vessels primarily engaged in the transport of petrochemical gases and the ship to ship transfer of crude oil and liquefied natural gas (“LNG”). Somargas owns six liquid petroleum gas/ethylene vessels (each with 8,500 - 10,000 cubic meters (“cbm”) carrying capacity). Singco owns four liquid petroleum gas/ethylene/LNG vessels (each with 10,000 cbm carrying capacity). The Somargas and Singco vessels operate under a pooling arrangement with the Skaugen fleet. The major trade lanes are the Arabian Peninsula to South Asia and the Far East.

Intermodal Investment Funds V and VII are each 50%-owned joint ventures with DVB Bank SE. The affiliates were formed to finance shipping containers, which are on direct finance leases to third parties.

Clipper Third Limited (“Clipper Third”) was a 50%-owned joint venture with Clipper Group Invest Ltd. (the “Clipper Group”). Clipper Third supported the worldwide movement of dry bulk products such as grain, cement, coal and steel. In 2012, the Clipper Third partners sold the affiliate's remaining assets and discontinued the joint venture.

Enerven Compression, LLC (“Enerven”) was a 45.6%-owned joint venture with ING Investment Management and Enerven management. Enerven provided natural gas compression equipment leasing through its subsidiary, Enerven Compression Services (“ECS”) and third-party maintenance and repair services through its subsidiary, Worldwide Energy Solutions Company (“WESCO”). In 2012, the Enerven partners sold substantially all of the assets and are in the process of liquidating the joint venture.

In 2011, the Clipper Fourth Limited and Clipper Fourth APS marine joint ventures, in each of which GATX held a 45% interest, were dissolved. In connection with the dissolutions, GATX took ownership of six chemical parcel tankers.

8

TRADEMARKS, PATENTS AND RESEARCH ACTIVITIES

Patents, trademarks, licenses and research and development activities are not material to GATX’s businesses taken as a whole.

SEASONAL NATURE OF BUSINESS

ASC’s fleet is inactive for a significant portion of the first quarter of each year due to the winter conditions on the Great Lakes.

CUSTOMER BASE

GATX, taken as a whole, is not dependent upon a single customer nor does it have any significant customer concentrations. Segment concentrations, if material, are described above.

EMPLOYEES AND EMPLOYEE RELATIONS

As of December 31, 2012, GATX employed 2,046 persons, of whom 35% were union workers covered by collective bargaining agreements.

The hourly employees at Rail North America’s three major U.S. service centers are represented by the United Steelworkers. Employees at three of Rail North America’s Canadian service centers are represented by to the Communication, Energy and Paperworkers Union of Canada. The shipboard personnel at ASC are represented by the American Maritime Officers and the Seafarers International Union.

As of January 31, 2013, the terms and status of GATX's existing collective bargaining agreements were as follows:

Union	Percent of Employees Represented	Status of the Agreements
United Steelworkers	16%	Expires in February 2013 (the parties are currently engaged in good faith bargaining for a new labor agreement).
Seafarers International Union	7%	Two agreements; one expires in June 2016 and one in January 2017.
American Maritime Officers	6%	Expires in January 2017.
Communications, Energy and Paperworks Union of Canada	4%	Three agreements; two expire in January 2014 and one expired in January 2013 (the parties are currently engaged in good faith bargaining for a new labor agreement).
Employee Shop Committee of Riviere-des-Prairies	2%	Expires in December 2013.

ENVIRONMENTAL MATTERS

GATX's operations, facilities and properties are subject to extensive federal, state, local, and foreign environmental laws and regulations. These laws cover discharges to waters; air emissions; toxic substances; the generation, handling, storage, transportation and disposal of waste and hazardous materials; and the investigation and remediation of contamination. These laws have the effect of increasing the cost and liability associated with leasing and operating assets, and violations can result in significant fines, penalties or other liability to the Company. Environmental risks and compliance with applicable environmental laws and regulations are inherent in rail operations, which frequently involve transporting chemicals and other hazardous materials.

9

GATX is subject to, and may from time to time continue to be subject to, environmental cleanup and enforcement actions in the U.S. and in the foreign countries in which it operates. In particular, the federal Comprehensive Environmental Response, Compensation and Liability Act (“CERCLA”), also known as the Superfund law, generally imposes joint and several liability for investigation, cleanup and enforcement costs on current and former owners and operators of a site, without regard to fault or the legality of the original conduct. Accordingly, GATX has been and may, in the future, be named as a potentially responsible party under CERCLA and other federal, state, local, and foreign laws or regulations for all or a portion of the costs to investigate and clean up sites at which certain contaminants may have been discharged or released by GATX, its current lessees, former owners or lessees of properties, or other third parties. Environmental remediation and other environmental costs are accrued when considered probable and amounts can be reasonably estimated. As of December 31, 2012, environmental costs were not material to GATX's financial position, results of operations or cash flows. For further discussion, see Note 22 to the consolidated financial statements.

EXECUTIVE OFFICERS OF THE REGISTRANT

The following information regarding GATX’s executive officers is included in Part I in lieu of inclusion in the definitive GATX Proxy Statement:

Name	Offices Held	Position Held Since	Age
Brian A. Kenney	Chairman, President and Chief Executive Officer	2005	53
Robert C. Lyons	Executive Vice President and Chief Financial Officer	2012	49
James F. Earl	Executive Vice President and President, GATX Rail International	2012	56
Deborah A. Golden	Executive Vice President, General Counsel and Corporate Secretary	2012	58
Michael T. Brooks	Senior Vice President and Chief Information Officer	2008	43
Thomas A. Ellman	Senior Vice President and Chief Commercial Officer	2011	44
Curt F. Glenn	Senior Vice President, Portfolio Management	2007	58
Mary K. Lawler	Senior Vice President, Human Resources	2008	47
William M. Muckian	Senior Vice President, Controller and Chief Accounting Officer	2007	53
Nicholas J. Matthews	Vice President and Group Executive, Operations	2010	40

• Mr. Kenney has served as Chairman, President and Chief Executive Officer since 2005. Previously, Mr. Kenney served as President from 2004 to 2005, Senior Vice President, Finance and Chief Financial Officer from 2002 to 2004, Vice President, Finance and Chief Financial Officer from 1999 to 2002, Vice President, Finance from 1998 to 1999, Vice President and Treasurer from 1997 to 1998, and Treasurer from 1995 to 1996.

• Mr. Lyons has served as Executive Vice President and Chief Financial Officer since June 2012. Previously, Mr. Lyons served as Senior Vice President and Chief Financial Officer from 2007 to June 2012, Vice President and Chief Financial Officer from 2004 to 2007, Vice President, Investor Relations from 2000 to 2004, Project Manager, Corporate Finance from 1998 to 2000, and Director of Investor Relations from 1996 to 1998.

• Mr. Earl has served as Executive Vice President, GATX Corporation and President, GATX Rail International since June 2012. In addition, Mr. Earl has served as the Chief Executive Officer of American Steamship Company since June 2012. Previously, Mr. Earl served as Executive Vice President and Chief Operating Officer from 2006 to June 2012, Executive Vice President — Rail from 2004 to 2006, Executive Vice President — Commercial at Rail from 2001 to 2004 and in a variety of increasingly responsible positions in the GATX Capital Rail Group from 1988 to 2001.

• Ms. Golden has served as Executive Vice President, General Counsel and Corporate Secretary since June 2012. Previously, Ms. Golden served as Senior Vice President, General Counsel and Corporate Secretary from 2007 to June 2012. Ms. Golden joined GATX in 2006 as Vice President, General Counsel and Corporate Secretary. Prior to joining GATX, Ms. Golden served as Vice President and General Counsel of Midwest Generation, LLC from 2004 to 2005, Deputy General Counsel, State of Illinois, Office of the Governor from 2003 to 2004 and Assistant General Counsel with Ameritech Corporation/SBC Communications, Inc. from 1997 to 2001.

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• Mr. Brooks has served as Senior Vice President and Chief Information Officer since November 2008. Prior to joining GATX, Mr. Brooks served as Chief Information Officer and Vice President of the retail division of Constellation Energy and held various consulting roles of increasing responsibility with Accenture and Oracle Corporation.

• Mr. Ellman has served as Senior Vice President and Chief Commercial Officer since 2011. Previously, Mr. Ellman served as Vice President and Chief Commercial Officer from 2006 to November 2011. Prior to re-joining GATX in 2006, Mr. Ellman served as Senior Vice President and Chief Risk Officer and Senior Vice President, Asset Management of GE Equipment Services, Railcar Services and held various positions at GATX in the GATX Rail Finance Group.

• Mr. Glenn has served as Senior Vice President, Portfolio Management since 2007. Previously, Mr. Glenn served as Vice President, Portfolio Management from 2006 to 2007 and as a GATX Corporation Vice President since 2004 and Executive Vice President of Portfolio Management since 2003. Prior to that, Mr. Glenn served as Senior Vice President and Chief Financial Officer of the GATX Capital Division of GATX Financial Corporation from 2000 to 2003 and in a variety of increasingly responsible positions at GATX Capital from 1980 to 2000.

• Ms. Lawler has served as Senior Vice President, Human Resources since 2008. Prior to joining GATX, Ms. Lawler served as Senior Vice President, Operations of Newsday, a Tribune Publishing Company. She joined Tribune Company in 1997 as Human Resources Counsel.

• Mr. Muckian has served as Senior Vice President, Controller and Chief Accounting Officer since 2007. Previously, Mr. Muckian served as Vice President, Controller and Chief Accounting Officer from 2002 to 2007, Controller and Chief Accounting Officer from 2000 to 2002, and Director of Taxes of GATX from 1994 to 2000.

• Mr. Matthews has served as Vice President and Group Executive, Operations, since April 2010. Prior to joining GATX, Mr. Matthews served as Senior Vice President of Operations for FreightCar America from 2007 to April 2010. He began, his rail industry career with Trinity Industries, working through a variety of operational, commercial and strategic roles.

AVAILABLE INFORMATION

GATX makes available free of charge at its website, www.gatx.com, its most recent annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and any amendments to those reports filed or furnished pursuant to the Securities Exchange Act of 1934, as amended (the "1934 Act"), as soon as reasonably practicable after such reports are electronically filed with, or furnished to, the U.S. Securities and Exchange Commission (“SEC”). Charters for the Audit Committee, Compensation Committee and Governance Committee of the Board of Directors, the Corporate Governance Guidelines, the Code of Business Conduct and Ethics and the Code of Ethics for Senior Officers are posted under Corporate Governance in the Investor Relations section of the GATX website, and are available in print upon request by any shareholder. Within the time period prescribed by SEC and New York Stock Exchange regulations, GATX will post on its website any amendment to the Code of Ethics for Senior Officers and the Code of Business Conduct and Ethics or any waivers thereof. The information on GATX’s website is not incorporated by reference into this report.

FORWARD-LOOKING STATEMENTS

Certain statements in this report may constitute forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, and are subject to the safe harbor provisions of those sections and the Private Securities Litigation Reform Act of 1995. These statements may appear throughout this report, including without limitation, in the sections entitled “Business”, “Risk Factors” and “Management's Discussion and Analysis”. Forward-looking statements refer to information that is not purely historical, such as estimates, projections and statements relating to our business plans, objectives and expected operating results, and the assumptions on which those statements are based. Some of these statements may be identified by words like “anticipate,” “believe,” “estimate,” “expect,” “intend,” “plan,” “predict,” “project” or other similar words. Investors are cautioned that any such forward-looking statements are not guarantees of future performance and involve risks and uncertainties that could cause actual results or developments to differ materially from the forward-looking statements.

A detailed discussion of the known material risks and uncertainties that could cause actual results and events to differ materially from such forward-looking statements is included in this report in Item 1A, “Risk Factors”. Specific risks and uncertainties include, but are not limited to, (1) general economic, market, regulatory and political conditions affecting the rail, marine and other industries served by GATX and its customers; (2) competitive factors in GATX's primary markets, including lease pricing and asset availability; (3) lease rates, utilization levels and operating costs in GATX's primary operating segments; (4) conditions in the capital markets or changes in GATX's credit ratings and financing costs; (5) risks related to GATX's international operations and expansion into new geographic markets;

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(6) risks related to compliance with, or changes to, laws, rules and regulations applicable to GATX and its rail, marine and other assets; (7) operational disruption and increased costs associated with compliance maintenance programs and other maintenance initiatives; (8) operational and financial risks associated with long-term railcar purchase commitments; (9) changes in loss provision levels within GATX's portfolio; (10) conditions affecting certain assets, customers or regions where GATX has a large investment; (11) impaired asset charges that may result from changing market conditions or portfolio management decisions implemented by GATX; (12) opportunities for remarketing income; (13) labor relations with unions representing GATX employees; and (14) the outcome of pending or threatened litigation.

Given these risks and uncertainties, readers are cautioned not to place undue reliance on these forward-looking statements, which reflect management's analysis, judgment, belief or expectation only as of the date hereof. GATX has based these forward-looking statements on information currently available and disclaims any intention or obligation to update or revise these forward-looking statements to reflect subsequent events or circumstances.

Item 1A.  Risk Factors

GATX is subject to a number of risks that investors should consider before investing in GATX’s securities. These risks include the factors described below as well as other information contained in this filing and GATX’s other filings with the U.S. Securities and Exchange Commission. If any of the events described below were to occur, GATX’s business, financial condition, results of operations and future growth prospects could suffer.

Competition could result in decreased profitability.

GATX operates in a highly competitive business environment. In many cases, competitors are larger entities that have greater financial resources, higher credit ratings and a lower cost of capital than GATX. These factors may enable competitors to offer leases and loans to customers at lower rates than GATX is able to provide, thus impacting GATX’s asset utilization or GATX’s ability to lease assets on a profitable basis.

Weak economic conditions, financial market volatility and other factors may decrease customer demand for GATX’s assets and services and negatively impact GATX’s business and results of operations.

GATX relies upon continued demand from its customers to lease its railcars, locomotives, marine assets and other equipment. Demand for these assets is dependent upon the markets for the products and services offered by the Company’s customers and the strength and growth of their businesses. A number of GATX’s customers operate in cyclical markets, such as the steel, chemical and construction industries, which are susceptible to macroeconomic downturns in the United States and abroad and may experience significant changes in demand over time.

Weak economic conditions in the United States and other parts of the world in recent years have reduced demand from certain GATX customers for the types of assets and services GATX provides. Continued weakness in certain sectors of the economy also may make it more difficult for GATX to lease certain types of railcars that are returned either at the end of a lease term or as a result of a customer bankruptcy or default. In Europe, the ongoing sovereign debt crisis, the loss of value by the Euro and related effects on the European banking system have contributed to growing instability in the European currency and credit markets. Further deterioration of European economic conditions or significant loss of value by the Euro could reduce demand for the Company’s European rail assets.

In many cases, demand for GATX’s assets is also dependent on customers’ desire to lease, rather than purchase assets. There are a number of items that factor into the customer’s decision to lease or purchase assets, such as tax and accounting considerations, interest rates and operational flexibility. GATX has no control over these external considerations, and changes in these factors, including potential changes to lease accounting rules, could negatively impact demand for its assets held for lease.

Additional factors influencing customer demand for GATX’s assets include changes in production volumes, potential changes in supply chains, choices regarding type of transportation asset, availability of substitutes and other operational needs. Demand for the marine assets and shipping services provided by the Company and its marine joint ventures is also dependent upon the factors discussed above. A significant decline in customer demand for the assets and services provided by GATX could adversely affect the Company’s financial performance.

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GATX may be unable to maintain assets on lease at satisfactory rates.

GATX’s profitability is largely dependent on its ability to maintain assets on lease at satisfactory rates and to re-lease or sell assets upon lease expiration. A number of factors can adversely affect asset utilization rates and lease rates, including, but not limited to, an economic downturn causing reduced demand, changes in customer behavior, excess capacity in the marketplace or other changes in supply or demand for such assets. Economic uncertainty or a decline in customer demand for GATX’s assets could cause customers to demand shorter lease terms and lower lease rates and could result in a decrease in the utilization rate for GATX’s assets and reduced revenues. Alternatively, customers may seek to lock-in relatively low lease rates for longer terms thereby resulting in an adverse impact on current or future revenues.

GATX’s access to newly-built railcars may be limited, and long-term railcar purchase commitments could subject GATX to material operational and financial risks. 

Unlike certain of its competitors in the railcar leasing market, GATX does not manufacture railcars. GATX’s ability to acquire newly-built railcars could be limited if the Company is unable to procure railcars from manufacturers on competitive terms. 

In order to obtain committed access to a supply of newly-built railcars on competitive terms, GATX from time to time enters into long-term supply agreements with manufacturers to purchase significant numbers of newly-built railcars over a multi-year period. The Company’s purchase commitments under these long-term agreements generally are not subject to cancellation or material reduction by GATX. If economic conditions weaken during the term of a long-term supply agreement, GATX would be required to continue to accept delivery of, and pay for, new railcars at times when it is difficult for the Company to place the railcars with customers and the Company’s financing costs may be unattractively high.

GATX’s rail and marine assets and operations are subject to various laws, rules and regulations, and failure to comply with, or changes to, these laws, rules or regulations could have a significant negative effect on GATX’s business and profitability.

GATX’s rail and marine operations are subject to various laws, rules and regulations administered by authorities in jurisdictions where GATX does business. In the United States, GATX’s railcar fleet and operations are subject to rules and regulations relating to safety, operations, maintenance and mechanical standards promulgated by various federal and state agencies and industry organizations, including the U.S. Department of Transportation, the Federal Railroad Administration and the Association of American Railroads. In addition, state agencies regulate some aspects of rail operations with respect to health and safety matters not otherwise preempted by federal law. GATX’s business operations and its railcar fleet may be adversely impacted by rules and regulations promulgated by these governmental and industry agencies, which could require substantial modification, maintenance or refurbishment of GATX’s railcars or potentially make such railcars inoperable or obsolete. Violations of these rules and regulations can result in substantial fines and penalties, including potential limitations on operations or forfeitures of assets.

Similarly, GATX’s marine assets and operations are subject to regulation by various federal and state agencies, including the Maritime Administration of the U.S. Department of Transportation, the U.S. Coast Guard and the U.S. Environmental Protection Agency, which establish rules and regulations relating to safety, citizenship, emissions, ballast discharges and other environmental and operational matters. If GATX fails to comply with these rules and regulations, the Company could be prohibited from operating or leasing marine assets in the U.S. market and, under certain circumstances, could incur severe fines and penalties, including potential limitations on operations or forfeitures of assets.

In addition, GATX’s foreign operations are subject to the jurisdiction of authorities in countries where the Company does business. Failure to comply with, or future changes to, any of the foregoing laws, rules or regulations could restrict the use or reduce the economic value of GATX’s assets, including loss of revenue, or cause GATX to incur significant expenditures to comply, thereby increasing operating expenses. Certain changes to laws, rules and regulations, or actions by authorities under existing laws, rules or regulations, could result in the obsolescence of various assets or impose compliance costs that are so significant as to render such assets economically obsolete.

A significant increase in the number of tank cars requiring compliance-based maintenance could negatively impact operations and substantially increase costs.

GATX performs a variety of maintenance programs on its full-service tank cars based upon their service time that are mandated by government regulations and industry rules. New government regulations or industry rules are enacted from time to time, which may

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affect the number and type of procedures required to be performed. These compliance programs are cyclical in nature and as a result, GATX can face significant increases in the volume of tank cars requiring extensive maintenance in any given year. A significant increase in the number of tank cars requiring maintenance may negatively impact GATX's operations and substantially increase maintenance and other related costs. In addition, while GATX has contracted with third party maintenance providers to assist in performing these compliance procedures, GATX's access to these providers may be constrained or costs may increase substantially in times of high demand from other tank car owners for services from these same providers.

Deterioration of conditions in the global capital markets, weakening of macroeconomic conditions, and negative changes in credit ratings may limit the ability of GATX to secure financing and may increase its borrowing costs.

GATX relies, in large part, upon banks and capital markets to fund its operations and contractual commitments, including the issuance of long-term debt instruments and commercial paper. These markets can experience high levels of volatility and access to capital can be constrained for an extended period of time. In addition to conditions in the capital markets, a number of other factors could cause GATX to incur increased borrowing costs and to have greater difficulty accessing public and private markets for both secured and unsecured debt. These factors include GATX’s financial performance and its credit ratings and rating outlook as determined primarily by rating agencies such as Standard & Poor’s and Moody’s Investor Service. If GATX is unable to secure financing on acceptable terms, the Company’s other sources of funds, including available cash, bank facilities, cash flow from operations and portfolio proceeds, may not be adequate to fund its operations and contractual commitments.

GATX’s assets may become obsolete.

In addition to changes in laws, rules and regulations that may make assets obsolete, GATX may be adversely impacted by changes in the preferred method used by the Company’s customers to ship their products, changes in demand for particular products, or by a shift by customers toward purchasing assets rather than leasing them from GATX. The industries in which GATX’s customers operate are driven by dynamic market forces and trends, which are in turn influenced by economic and political factors in the United States and abroad. Demand for GATX’s rail and marine assets may be significantly affected by changes in the markets in which the Company’s customers operate. A significant reduction in customer demand for transportation or manufacture of a particular product or change in the preferred method of transportation used by customers to ship their products could result in the economic obsolescence of GATX assets leased by those customers.

Events or conditions negatively affecting certain assets, customers or geographicregions in which GATX has a large investment could have a negative impact on itsresults of operations.

GATX’s revenues are generally derived from a number of different asset types, customers, industries and geographic locations. However, from time to time, GATX could have a large investment in a particular asset type, a large revenue stream associated with a particular customer or industry, or a large number of customers located in a particular geographic region. Decreased demand from a discrete event impacting a particular asset type, discrete events with respect to a specific customer or industry, or adverse regional economic conditions, particularly for those assets, customers or regions in which GATX has a concentrated exposure, could have a negative impact on GATX’s results of operations.

Risks related to GATX's international operations and expansion into new geographic markets could adversely affect GATX's business, financial condition and operating results.

GATX generates a significant amount of its net income outside the United States and in recent years has increased its focus on international rail growth and expansion into select emerging markets as a means to grow and diversify earnings. GATX's foreign operations and international expansion strategy are subject to risks associated with international operations, including: compliance with United States laws affecting operations outside of the United States, such as the Foreign Corrupt Practices Act; compliance with a variety of local laws and regulations; changes in tax laws and the interpretation of those laws; fluctuations in currency values; sudden changes in foreign currency exchange controls; discriminatory or conflicting fiscal policies; difficulties enforcing contractual rights or foreclosing to obtain the return of GATX assets in certain jurisdictions; greater risk of uncollectible accounts and longer collection cycles; effective and immediate implementation of appropriate controls, policies and processes across GATX's diverse operations and employee base; nationalization of properties by foreign governments, and imposition of additional or new tariffs, quotas, trade barriers and similar restrictions on GATX's sales outside the United States. Moreover, political and economic changes or volatility, geopolitical regional conflicts, terrorist activity, political unrest, civil strife, acts of war, public corruption and other economic or political uncertainties could

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interrupt and negatively affect GATX's business operations. Depending upon the severity, scope and duration of these conditions or events, the adverse impact on GATX's financial position, results of operations and cash flows could be material.

GATX’s allowance for losses may prove inadequate.

GATX’s allowance for losses on reservable assets may not be adequate over time to cover credit losses in its portfolio if unexpected adverse changes in the economy differ from the expectations of management or if discrete events adversely affect specific customers, industries or markets. If the credit quality of GATX’s customer base materially deteriorates, the Company may be required to provide for additional credit losses and GATX’s financial position or results of operations could be negatively impacted.

GATX may incur future asset impairment charges.

GATX regularly reviews long-lived assets and joint venture investments for impairment, including when events or changes in circumstances indicate the carrying value of an asset or investment may not be recoverable. GATX may be required to recognize asset impairment charges in the future as a result of a weak economic environment, challenging market conditions, events related to particular customers or asset types, or as a result of asset or portfolio sale decisions by management or other factors that affect GATX’s estimates of expected cash flows to be generated from its long-lived assets or joint venture investments.

GATX is subject to extensive environmental regulations and the costs of remediationmay be material.

GATX’s operations are subject to extensive federal, foreign, state and local environmental laws and regulations concerning, among other things, the discharge of hazardous materials and remediation of contaminated sites. In addition, some of GATX’s properties, including those previously owned or leased, have been used for industrial purposes whose activities may have resulted in discharges onto the property. Environmental liability can extend to previously owned or operated properties as well as properties currently owned and used by the Company. Environmental liabilities are routinely assessed, including obligations and commitments for remediation of contaminated sites and assessments of ranges and probabilities of recoveries from other responsible parties. Due to the regulatory complexities and risk of unidentified contaminants on its properties, the potential exists for environmental and remediation costs to be materially different from the costs GATX has estimated.

GATX has been, and may in the future be, involved in various types of litigation.

The nature of GATX’s businesses and assets expose the Company to the potential for claims and litigation related to personal injury and property damage, environmental claims and various other matters. Certain GATX railcars may be used by customers to transport hazardous materials, and a rupture of a railcar carrying such materials in an accident could lead to litigation and subject GATX to the potential for significant liability. GATX's failure to maintain railcars in compliance with governmental regulations and industry rules could expose the Company to personal injury, property damage and environmental claims. A substantial adverse judgment against GATX could have a material adverse effect on the Company’s financial position, results of operations and cash flows.

High energy prices could have a negative effect on the demand forGATX’s products and services.

Energy prices, including the price of natural gas and oil, are significant cost drivers for many of GATX’s customers, either directly in the form of raw material costs in industries such as the chemical and steel industries, or indirectly in the form of increased transportation costs. Sustained high energy prices could negatively impact these industries resulting in a corresponding adverse effect on customer demand for GATX’s assets, as well as related services.

GATX may not be able to procure insurance on a cost-effective basis.

GATX manages its exposure to risk, in part, by insuring its assets and their associated risks. There is no guarantee that such insurance will be consistently available on a cost-effective basis in the future. If the cost of insurance coverage becomes prohibitively expensive, GATX could be forced to reduce the amount of coverage and increase the amount of its self-insured risk retention.

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The fair market value of GATX’s long-lived assets may differ from the value of thoseassets reflected in its financial statements.

GATX’s assets primarily consist of long-lived assets such as railcars, marine vessels and industrial equipment. The carrying value of these assets in the financial statements may at times differ from their fair market value. These valuation differences may be positive or negative and may be material based on market conditions and demand for certain assets.

Fluctuations in foreign exchange rates and interest rates could have a negative impact on GATX’s resultsof operations.

GATX’s results are exposed to foreign exchange rate fluctuations as the financial results of certain subsidiaries are translated from their local currency into U.S. dollars upon consolidation. As exchange rates vary, the operating results of foreign subsidiaries, when translated, may differ materially from period to period. GATX is also subject to gains and losses on foreign currency transactions, which could vary based on fluctuations in exchange rates and the timing of the transactions and their settlement. In addition, fluctuations in foreign exchange rates can have an effect on the demand and relative price for services provided by GATX domestically and internationally, and could have a negative impact on GATX’s results of operations. GATX is also subject to risks associated with fluctuations in interest rates. The Company may seek to limit foreign exchange rate and interest rate risk through the use of currency or interest rate derivatives, but these measures may not be effective. A material and unexpected change in interest rates or foreign exchange rates could negatively affect GATX’s financial performance.

GATX is subject to the inherent risks of its affiliate investments.

GATX has investments in affiliated companies that are subject to many of the same risks discussed in this “Risk Factors” section, and GATX is indirectly exposed to these risks through its ownership interests in these affiliates. Many of these affiliates are managed and operated by third parties who may be smaller than GATX and have lesser financial resources. Adverse developments in the business or financial results of these affiliates, or the third parties who manage, operate, or invest along with GATX in these affiliates, could have a negative impact on GATX’s financial results. Additionally, where an affiliate is managed and operated by GATX’s partner in the affiliate or another third party, GATX may not have control over operational matters, which could result in actions taken at the affiliate level that may have an adverse economic impact on GATX or otherwise expose GATX to potential liability.

GATX has significant financial exposure related to the performance of its aircraft engine leasing affiliate investments.

GATX and Rolls-Royce each own 50% of fourteen domestic and foreign joint venture entities (collectively, the “RRPF Affiliates”) that own and lease aircraft engines to Rolls-Royce and other owners and operators of commercial aircraft. Through these investments, GATX is exposed to various risks associated with the commercial aviation industry, including geographic exposure and customer concentrations unique to that industry. Further, the financial results of the RRPF Affiliates are heavily dependent on the performance of Rolls-Royce, which is both a major customer of, and a critical supplier of maintenance services to, the RRPF Affiliates. The RRPF Affiliates are significant contributors to GATX’s consolidated segment profit. If the financial or operating performance of the RRPF Affiliates were to deteriorate, GATX’s results of operations and cash flows could be negatively affected. 

GATX may be affected by climate change or market or regulatory responses to climate change.

Changes in laws, rules and regulations, or actions by authorities under existing laws, rules or regulations, to address greenhouse gas emissions and climate change could have a negative impact on the Company’s customers and business. For example, restrictions on emissions could significantly increase costs for GATX customers who produce energy or manufacture chemical or other products that require significant amounts of energy to produce. This, in turn, could reduce customer demand to lease the Company’s assets. New government regulations could also increase marine and other operating costs for GATX or its joint venture entities, or could require significant capital expenditures to comply. All or any of these potential consequences of climate change could have an adverse effect on the Company’s financial position, results of operations and cash flows.

A small number of shareholders could significantly influence GATX’s business and affairs.

Based on filings with the U.S. Securities and Exchange Commission and other information available to the Company, seven shareholders collectively controlled approximately 50% of GATX’s outstanding common stock. Accordingly, a small number of shareholders could affect matters that require shareholder approval, such as the election of directors and the approval of significant business transactions.

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GATX cannot predict with certainty the impact that inflation or deflation will have on its financial results.

Effects of inflation are unpredictable as to timing and duration and depend on market conditions and economic factors. Inflation in lease rates as well as inflation in residual values for rail, marine and other equipment has historically benefited GATX’s financial results. However, these benefits may be offset, in whole or in part, by increases in the costs for goods and services purchased by GATX, including salaries and wages, health care costs, supplies, utilities, and maintenance and repair services and materials, as well as increased financing costs. Significant increases in GATX’s cost of goods and services could adversely impact the Company’s financial performance. A period of prolonged deflation would have a negative impact on GATX from several perspectives, including lease rate pricing, residual values and asset remarketing opportunities. These negative impacts of deflation may be offset, in whole or in part, by decreases in the cost to GATX of goods and services, including those discussed herein.

Unfavorable conditions on the Great Lakes could impact normal business operations, which could result in increased costs and decreases in revenues.

The success of GATX’s ASC subsidiary is dependent upon its ability to operate efficiently on the Great Lakes. Disruptions at the Sault St. Marie locks or severe weather conditions, including, but not limited to, high wind and ice formation, could cause significant business interruptions or shortened sailing seasons. Additionally, low water levels and vessel draft restrictions in certain harbors or canals may restrict the volume that may be transported in ASC’s vessels on a per trip basis. These conditions could negatively impact GATX’s results of operations through increased operating costs or decreased revenues.

Many of GATX’s employees are represented by unions, and the failure to successfully negotiate collective bargaining agreements may result in strikes, work stoppages or substantially higher labor costs.

A significant portion of GATX’s employees are represented by labor unions and work under collective bargaining agreements that cover a range of workplace matters, including wages, health and welfare benefits, work rules and other issues. Historically, the Company and its unions have been generally successful in negotiating acceptable agreements without the occurrence of material work stoppages. However, if the Company is unable to negotiate acceptable new agreements, it could result in strikes by the affected workers, lockouts by the Company, or other forms of business disruption and increased operating costs due to higher wages or benefits paid to union workers, any of which could have an adverse effect on the Company’s financial position, results of operations or cash flows.

Changes to assumptions used to calculate post-retirement costs, increases in funding requirements and investment losses in pension funds could adversely affectGATX’s results of operations.

GATX’s pension and other post-retirement costs are dependent on various assumptions used to calculate such amounts, including discount rates, long-term return on plan assets, salary increases, health care cost trend rates and other factors. Changes to any of these assumptions could adversely affect GATX’s financial position and results of operations. Periods of low interest rates reduce the discount rate used to calculate GATX's funding obligations, which may increase GATX's funding requirements. Additionally, GATX could be required to increase contributions to its pension plans as a result of changes to laws, regulations or rules that increase funding requirements or to compensate for investment losses in pension plan assets. If GATX were forced to increase contributions to its pension plans, the Company’s financial position, results of operations and cash flows could be negatively affected.

GATX’s effective tax rate could be adversely affected by changes in the mix ofearnings in the U.S. and foreign countries.

GATX is subject to taxes in the United States and various foreign jurisdictions. As a result, GATX’s effective tax rate could be adversely affected by changes in the mix of earnings in the United States and foreign countries with differing statutory tax rates, legislative changes impacting statutory tax rates, including the impact on recorded deferred tax assets and liabilities, changes in tax laws or by material audit assessments.

United States and global economic and political conditions, including acts or threatsof terrorism or war, could adversely affect GATX.

National and international political developments, instability and uncertainties, including political unrest and threats of terrorist attacks, could result in global economic weakness in the United States and in other countries where GATX operates, and could have an adverse impact on GATX. The effects may include: legislation or regulatory action directed toward improving the security of railcars and marine

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vessels against acts of terrorism, which could affect the construction or operation of railcars and marine vessels; a decrease in demand for rail and marine services; lower utilization of new and existing rail and marine equipment; lower rail lease and marine charter rates; impairments of rail and marine assets or capital market disruption, which may raise GATX’s financing costs or limit its access to capital; and liability or losses resulting from acts of terrorism involving GATX’s assets. Depending upon the severity, scope and duration of these effects, the impact on GATX’s financial position, results of operations and cash flows could be material.

GATX’s business could be negatively impacted by security threats, including cybersecurity threats, and related disruptions.

GATX relies on its information technology (“IT”) infrastructure to process, transmit and store electronic information critical for the efficient operation of its business and day-to-day operations. All IT systems are potentially vulnerable to security threats, including hacking, viruses and other malicious software, and other unlawful attempts to disrupt or gain access to such systems. Breaches in GATX’s IT infrastructure could lead to a material disruption in its business, including the theft, destruction, loss, misappropriation or release of confidential data or other business information, and may have a material adverse effect on GATX’s operations, financial position and results of operations.

GATX’s internal control over financial accounting and reporting may not detect allerrors or omissions in the financial statements.

If GATX fails to maintain adequate internal controls over financial accounting, the Company may not be able to ensure that GATX can conclude on an ongoing basis that it has effective internal control over financial reporting in accordance with Section 404 of the Sarbanes-Oxley Act and related regulations. Although GATX’s management has concluded that adequate internal control procedures are in place, no system of internal control can provide absolute assurance that the financial statements are accurate and free of error. As a result, the risk exists that GATX’s internal control may not detect all errors or omissions in the financial statements.

Item 1B.  Unresolved Staff Comments

None.

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Item 2.  Properties

Information regarding the location and general character of certain properties of GATX is included in Item 1, “Business”,of this document.

Locations of operations are as follows:

GATX Headquarters
Chicago, Illinois
Railcar Leasing Operations
Business Offices	Major Service Centers	Fast Track Service Centers	American Steamship Company
San Francisco, California	Colton, California	East Chicago, Indiana	Williamsville, New York
Alpharetta, Georgia	Waycross, Georgia	Terre Haute, Indiana	Toledo, Ohio
Chicago, Illinois	Hearne, Texas	Kansas City, Kansas
Paducah, Kentucky	Red Deer, Alberta		Portfolio Management
Savage, Minnesota	Montreal, Quebec	Mobile Service Units	San Francisco, California
Bozeman, Montana	Moose Jaw, Saskatchewan	Mobile, Alabama
Morrill, Nebraska	Hannover, Germany	Tampa, Florida
Hackensack, New Jersey	Ostróda, Poland	Gray, Georgia
Holicong, Pennsylvania		Hammond, Indiana
Doylestown, Pennsylvania	Field Repair Centers	Sioux City, Iowa
Monroeville, Pennsylvania	Plantersville, Texas	Donaldsonville, Louisiana
Houston, Texas	Sarnia, Ontario	Camp Minden, Louisiana
Calgary, Alberta		Lake Charles, Louisiana
Mississauga, Ontario	Customer Site Locations	Morris, Kansas
Montreal, Quebec	Donaldsonville, Louisiana	Columbia, New Jersey
Mexico City, Mexico	Geismar, Louisiana	Copperhill, Tennessee
Vienna, Austria	Cincinnati, Ohio	Galena Park, Texas
Düsseldorf, Germany	Catoosa, Oklahoma	Olympia, Washington
Leipzig, Germany	Freeport, Texas	Edmonton, Alberta
Hamburg, Germany	Yazoo City, Mississippi	Red Deer, Alberta
Warsaw, Poland	Płock, Poland	Clarkson, Ontario
New Delhi, India		Sarnia, Ontario
Moscow, Russia		Moose Jaw, Saskatchewan
		Montreal, Quebec
		Quebec City, Quebec

Item 3.  Legal Proceedings

Information concerning litigation and other contingencies is described under “Legal Proceedings and Other Contingencies” in Note 22 to the consolidated financial statements and is incorporated herein by reference.

Item 4.  Mine Safety Disclosure

Not applicable.

19

PART II

Item 5.  Market for Registrant’s Common Equity, Related StockholderMatters and Issuer Purchases of Equity Securities

GATX common stock is listed on the New York and Chicago Stock Exchanges under ticker symbol GMT. The approximate number of common shareholders of record as of January 31, 2013, was 2,300. The following table shows the reported high and low sales price of GATX common shares and the dividends declared per share:

									2012		2011
	2012		2012		2011		2011		Dividends		Dividends
Common Stock	High		Low		High		Low		Declared		Declared
First quarter	$	45.50	$	39.86	$	38.94	$	31.95	$	0.30	$	0.29
Second quarter	43.84		35.52		42.84		35.16		0.30		0.29
Third quarter	45.28		36.68		40.30		29.43		0.30		0.29
Fourth quarter	45.99		39.83		44.98		28.90		0.30		0.29

For information pertaining to issuable securities under equity compensation plans and the related weighted average exercise price, see Note 11 to the consolidated financial statements and Item 12, “Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.” For information regarding restricted net assets, see Note 8 to the consolidated financial statements.

20

GATX Common Stock Performance Graph

The following GATX Common Stock Performance Graph (the “Performance Graph”) and related information shall not be deemed“soliciting material” or to be “filed” with the Securities and Exchange Commission,nor shall such information be incorporated by reference into any future filing underthe Securities Act of 1933 or Securities Exchange Act of 1934, each as amended,except to the extent that the Company specifically incorporates it by reference intosuch filing.

The following Performance Graph sets forth a comparison of the cumulative total shareholder return of the Company’s common stock for the five-year period ending December 31, 2012, with the cumulative total return of the Standard & Poor’s 500 Composite Stock Price Index (“S&P 500”), the Standard & Poor’s MidCap 400 Index (“MidCap 400”) and Russell 3000 Index for the same period. The Company is not aware of any peer companies whose businesses are directly comparable to that of GATX and, therefore, the graph below displays the returns of the MidCap 400 and Russell 3000, both of which are comprised of companies with market capitalizations similar to GATX. The Performance Graph assumes $100 was invested in GATX common stock and each of the indices on December 31, 2007, and all dividends were reinvested.

	12/31/08		12/31/09		12/31/10		12/31/11		12/31/12
GATX	$	87.38	$	84.27	$	106.70	$	135.55	$	138.16
S&P 500	63.45		79.90		91.74		93.67		108.55
MidCap 400	64.09		87.73		110.88		109.00		128.38
Russell 3000	63.12		80.69		94.15		95.12		110.62

21

Item 6.  Selected Financial Data

The following financial information has been derived from GATX’s audited consolidated financial statements. This information should be read in conjunction with "Management’s Discussion and Analysis of Financial Condition and Results of Operations" and the consolidated financial statements and notes thereto included elsewhere herein.

	Year Ended or at December 31
	2012			2011			2010			2009			2008
	In millions, except per share data
Results of Operations
Revenue	$	1,243.2		$	1,191.4		$	1,114.0		$	1,083.8		$	1,270.9
Gain on asset dispositions	79.5			65.8			41.1			29.5			81.5
Share of affiliates’ earnings (pre-tax)	21.6			40.6			38.1			29.0			90.6
Net income	137.3			110.8			80.8			81.4			194.8
Net income, excluding Tax Adjustments and Other Items *	133.8			95.0			74.6			94.7			174.9
Per Share Data
Basic earnings	2.93			2.39			1.75			1.74			4.09
Diluted earnings	2.88			2.35			1.72			1.70			3.88
Diluted earnings, excluding Tax Adjustments and Other Items *	2.81			2.01			1.59			1.97			3.49
Dividends declared	1.20			1.16			1.12			1.12			1.08
Financial Condition
Operating assets and facilities, net of accumulated depreciation	$	4,654.4		$	4,359.3		$	4,133.8		$	4,033.3		$	3,921.6
Investments in affiliated companies	502.0			513.8			486.1			452.2			399.3
Total assets	6,055.4			5,857.5			5,490.5			5,206.4			5,190.5
Off balance sheet assets  *	884.5			887.1			971.5			1,016.1			1,061.2
Short-term borrowings	273.6			28.6			115.6			70.8			125.1
Long-term debt and capital lease obligations	3,294.3			3,518.5			3,060.9			2,842.0			2,684.2
Shareholders’ equity	1,244.2			1,127.3			1,113.7			1,102.6			1,124.5
Other Data
Average number of common shares and common share equivalents	47.6			47.2			47.0			48.8			51.0
Net cash provided by operating activities	370.2			306.8			243.7			267.0			364.0
Portfolio proceeds	288.9			154.1			84.3			67.9			156.1
Portfolio investments and capital additions	770.0			614.6			585.1			480.4			593.1
Recourse leverage	3.2			3.4			3.3			3.1			2.9
ROE	11.6		%	9.9		%	7.3		%	7.3		%	17.1		%
ROE, excluding Tax Adjustments and Other Items  *	11.3		%	8.5		%	6.7		%	8.5		%	15.4		%

__________

^(*) See Non-GAAP Financial Measures included in Item 7.

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Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations

OVERVIEW

Headquartered in Chicago, Illinois, GATX Corporation (“GATX” or the “Company”) leases, operates, manages and remarkets long-lived, widely-used assets, primarily in the rail and marine markets. GATX also invests in joint ventures that complement existing business activities. In 2012, the Company modified the composition of its reportable segments to reflect an increasing focus on international growth and related changes in its management structure. As a result, the Company now reports financial results through fourprimary business segments: Rail North America, Rail International, American Steamship Company (“ASC”) and Portfolio Management. All segment information is presented on this basis. General information and characteristics of GATX, including reporting segments, is included in Item 1, “Business”,of this document.

The following discussion and analysis should be read in conjunction with the audited financial statements included herein. This “Management’s Discussion and Analysis of Financial Condition and Results of Operations” is based on financial data derived from the financial statements prepared in accordance with generally accepted accounting principles (“GAAP”) and certain other financial data that is prepared using non-GAAP components. For a reconciliation of these non-GAAP components to the most comparable GAAP components, see “Non-GAAP Financial Measures” at the end of this Item.

23

DISCUSSION OF OPERATING RESULTS

The following table presents a summary of GATX’s reporting segments and consolidated financial results (in millions, except per share data):

	Years Ended December 31
	2012			2011			2010
Revenues
Rail North America	$	765.3		$	742.4		$	720.0
Rail International	167.7			168.3			147.5
ASC	243.4			216.4			189.4
Portfolio Management	66.8			64.3			57.1
	$	1,243.2		$	1,191.4		$	1,114.0
Segment Profit
Rail North America	$	209.3		$	172.7		$	120.1
Rail International	32.7			60.7			30.5
ASC	37.5			27.3			28.6
Portfolio Management	50.2			47.6			48.7
Total Segment Profit	329.7			308.3			227.9
Less:
Selling, general and administrative expense	160.2			155.3			134.8
Unallocated interest expense, net	5.4			4.5			3.5
Other, including eliminations	(1.3		)	0.3			(7.8		)
Income Taxes (including $2.0, $8.2 and $9.6 for 2012, 2011 and 2010, respectively, related to affiliates' earnings)	28.1			37.4			16.6
Net Income	$	137.3		$	110.8		$	80.8
Net income, excluding Tax Adjustments and Other Items	$	133.8		$	95.0		$	74.6
Diluted earnings per share	2.88			2.35			1.72
Diluted earnings per share, excluding Tax Adjustments and Other Items	2.81			2.01			1.59
Return on equity (“ROE”)	11.6		%	9.9		%	7.3		%
ROE, excluding Tax Adjustments and Other Items	11.3		%	8.5		%	6.7		%
Investment Volume	$	770.0		$	614.6		$	585.1

2012 Summary

• Net income for 2012 was $137.3 million, or $2.88 per diluted share, compared to $110.8 million, or $2.35 per diluted share, for 2011 and $80.8 million or $1.72 per diluted share for 2010. Results for 2012, 2011 and 2010 included Tax Adjustments and Other Items of $3.5 million, $15.8 million and $6.2 million, respectively. (See Non-GAAP Financial Measures for further details). Excluding the impact of these items, net income in 2012 was $133.8 million, an increase of 40.8%, or $38.8 million, from 2011; and net income in 2011 was $95.0 million, an increase of 27.3% or 20.4 million, from 2010. The increase in 2012 was primarily driven by higher Rail North America lease rates, increased asset remarketing income and lower Rail North America maintenance costs due to fewer service events resulting from high lease renewal success. The increase in 2011 was primarily driven by higher Rail North America lease income, higher asset remarketing income and higher scrapping gains, partially offset by higher selling, general and administrative expenses.

• Total investment volume was $770.0 million in 2012, compared to $614.6 million in 2011 and $585.1 million in 2010.

24

Segment Operations

Segment profit is an internal performance measure used by the Chief Executive Officer to assess the performance of each segment in a given period. Segment profit includes all revenues, pre-tax earnings from affiliates and net gains on asset dispositions that are attributable to the segments as well as expenses that management believes are directly associated with the financing, maintenance and operation of the revenue earning assets. Segment profit excludes selling, general and administrative expenses, income taxes and certain other amounts not allocated to the segments. These amounts are included in Other.

GATX allocates debt balances and related interest expense to each segment based upon a pre-determined fixed recourse leverage level expressed as a ratio of recourse debt (including off balance sheet debt) to equity. The leverage levels for Rail North America, Rail International, ASC and Portfolio Management are set at5:1, 2:1, 1.5:1 and 3:1, respectively. Management believes that by utilizing this leverage and interest expense allocation methodology, each operating segment’s financial performance reflects appropriate risk-adjusted borrowing costs.

RAIL NORTH AMERICA

Segment Summary

Rail North America continued to experience improved demand for tank cars, which led to improved lease rate pricing and lengthening of lease terms. The weighted average lease renewal rate on cars in the GATX Lease Price Index (the “LPI”, see definition below) increased 25.6% from the weighted average expiring lease rate, compared to an increase of 6.9% in 2011 and a decrease of 15.8% in 2010. Lease terms on renewals for cars in the LPI averaged 60 months in 2012, compared to 45 months in 2011 and 35 months in 2010. During 2012, an average of 107,255 railcars were on lease compared to 107,320 in 2011. Utilization was 97.9% at the end of 2012, compared to 98.2% at the end of 2011. In 2013, leases for approximately 20,500 railcars will expire, of which approximately 3,500 have already been renewed. In general, GATX expects strong renewal success at higher lease rates, particularly for tank cars. However, cars that serve the coal and grain markets, of which approximately 3,800 have leases expiring in 2013, are presently experiencing weak demand and these cars will be difficult to re-lease at existing terms and rates. Rail North America also anticipates a material increase in maintenance expense in 2013 and 2014 due to the number of tank cars that are scheduled to undergo required regulatory maintenance.

GATX continues to pursue prudent investment opportunities in North America. In 2011, GATX entered into a purchase agreement for 12,500 railcars to be delivered in North America ratably over five years, the largest such commitment in GATX’s history. In 2013, Rail North America expects to take delivery of approximately 2,750 new railcars. In addition, Rail North America expects to add other selected assets to its fleet, although rising asset prices may impact the level of investment spending.

25

Rail North America’s segment results are summarized below (in millions):

	Years Ended December 31
	2012			2011			2010
Revenues
Lease revenue	$	713.9		$	690.9		$	671.5
Other revenue	51.4			51.5			48.5
Total Revenues	765.3			742.4			720.0
Expenses
Maintenance expense	201.4			206.1			205.5
Depreciation	167.7			162.5			158.6
Operating lease expense	126.5			130.9			139.1
Other operating expense	18.5			18.8			24.2
Total Expenses	514.1			518.3			527.4
Other Income (Expense)
Net gain on asset dispositions	58.6			52.1			29.6
Interest expense, net	(101.9		)	(101.7		)	(103.8		)
Other (expense) income	(5.1		)	(5.7		)	(5.5		)
Share of affiliates' earnings (pre-tax)	6.5			3.9			7.2
Segment Profit	$	209.3		$	172.7		$	120.1
Investment Volume	$	465.9		$	280.5		$	367.1

Components of Rail North America lease income for the years ended December 31 are outlined below (in millions):

	2012		2011		2010
North American railcars	$	680.0	$	654.9	$	637.2
Locomotives	33.9		36.0		34.3
	$	713.9	$	690.9	$	671.5

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Lease Price Index

The GATX Lease Price Index is an internally generated business indicator that measures general lease rate pricing on renewals within the Rail’s North America fleet. The index reflects the weighted average lease rate for a select group of railcar types that Rail North America believes to be representative of its overall fleet. The LPI measures the percentage change between the weighted average renewal lease rate and the weighted average expiring lease rate. Average renewal term reflects the weighted average renewal lease term in months.

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Rail North America Fleet Data

The following table summarizes fleet activity for Rail North America railcars for the years indicated:

	2012		2011		2010
Beginning balance	109,070		111,389		110,870
Cars added	4,572		2,873		5,448
Cars scrapped	(2,045	)	(3,363	)	(3,539	)
Cars sold	(2,046	)	(1,829	)	(1,390	)
Ending balance	109,551		109,070		111,389
Utilization rate at year end	97.9	%	98.2	%	97.4	%
Active railcars at year end	107,216		107,075		108,447
Average (monthly) active railcars	107,255		107,320		105,483

The following table summarizes fleet activity for Rail North America locomotives for the years indicated:

	2012		2011		2010
Beginning balance	572		550		529
Locomotives added	50		28		21
Locomotives scrapped or sold	(61	)	(6	)	—
Ending balance	561		572		550
Utilization rate at year end	98.6	%	98.1	%	97.6	%
Active locomotives at year end	553		561		537
Average (monthly) active locomotives	549		553		516

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Comparison of Year Ended December 31, 2012 to Year Ended December 31, 2011

Segment Profit

Rail North America's segment profit was $209.3 million in 2012 compared to $172.7 million in 2011. The 2011 results included $5.5 million of income related to a leveraged lease adjustment attributable to changes in the timing of the taxable income associated with a leveraged lease structure upon settlement of an IRS audit. Excluding the effect of this item, segment profit increased $42.1 million, primarily due to higher lease income and gains on asset dispositions combined with lower maintenance expense.

Revenues

Lease income increased $23.0 million, primarily due to higher lease rates in the current year, as the average number of cars on lease approximated the prior year. Partially offsetting the increase was the absence of the aforementioned leveraged lease adjustment.

Expenses

Maintenance expense decreased $4.7 million, primarily due to fewer service events resulting from high lease renewal success. Depreciation increased $5.2 million, primarily due to investment activity. Operating lease expense decreased $4.4 million, primarily due to the expiration of leases in the prior year for which the underlying railcars were re-acquired.

Other Income (Expense)

Net gain on asset dispositions increased $6.5 million, primarily due to an $11.1 million fee received on the early termination of a residual value guarantee, partially offset by lower scrapping gains due to fewer railcars scrapped at lower scrap rates. Share of Affiliates’ earnings increased $2.6 million, primarily due to asset remarketing gains at the Adler affiliate in 2012.

Investment Volume

During 2012, Rail North America acquired approximately 4,660 railcars compared to 2,650 railcars in 2011.

Comparison of Year Ended December 31, 2011 to Year Ended December 31, 2010

Segment Profit

Rail North America's segment profit was $172.7 million in 2011 compared to $120.1 million in 2010. The 2011 results included $5.5 million of income related to the leveraged lease adjustment. Excluding the effect of this item, segment profit increased $47.1 million, primarily due to higher lease income and gains on asset dispositions combined with lower expenses.

Revenues

Lease income increased $19.4 million in 2011, of which $5.5 million related to the aforementioned leveraged lease adjustment. The remaining variance was primarily due to an average of approximately 1,800 more railcars on lease in 2011. Other income increased $3.0 million, primarily due to higher revenue from third party and customer liability repairs, partially offset by the absence of income from an end-of-lease settlement received in 2010.

Expenses

Maintenance expense in 2011 approximated the prior year as higher costs from railcar conversion programs and locomotive maintenance were substantially offset by lower costs at the Company’s owned service facilities. Depreciation increased $3.9 million in 2011, primarily due to investment activity. Operating lease expense decreased $8.2 million, primarily due to leases that expired in 2011 for which the underlying railcars were re-acquired. Other operating expense decreased $5.4 million, primarily due to lower storage and switching fees resulting from the increase in cars on lease.

29

Other Income (Expense)

Net gain on asset dispositions increased $22.5 million, primarily due to sales of approximately 450 more railcars in 2011, higher scrapping gains as a result of more railcars scrapped at higher scrap steel rates, and lower asset impairment charges. In 2010, a $4.8 million charge was recorded due to an Association of American Railroads industry-wide regulatory mandate that resulted in a significant decrease to the expected economic life of 358 aluminum hopper railcars. Interest expense decreased $2.1 million, primarily due to lower interest rates, partially offset by higher debt balances. Share of affiliates’ earnings decreased $3.3 million, primarily due to an asset remarketing gain at an affiliate that occurred in 2010.

Investment Volume

During 2011, Rail North America acquired approximately 2,650 railcars compared to 5,300 railcars in 2010.

RAIL INTERNATIONAL

Segment Summary

Rail Europe's wholly-owned tank car fleet exhibited increases in both lease pricing and railcars on lease in 2012, reflective of strong market demand. During 2012, there was an average of 20,461 railcars on lease compared to 19,834 in 2011. Utilization was 95.1% at the end of 2012, compared to 97.1% at the end of 2011. AAE, which serves the European freight railcar markets, experienced modest improvement in its markets and its fleet utilization was stable. Rail Europe has commitments to acquire 1,500 newly manufactured railcars to be delivered in 2013 and 2014 (including cars assembled by Rail Europe).

Rail India commenced operations in 2012, taking delivery of 46 newly manufactured railcars in December, which have been placed on lease with a customer commencing in 2013.

Rail International’s segment results are summarized below (in millions):

	Years Ended December 31
	2012			2011			2010
Revenues
Lease revenue	$	161.2		$	160.5		$	141.8
Other revenue	6.5			7.8			5.7
Total Revenues	167.7			168.3			147.5
Expenses
Maintenance expense	46.6			52.1			49.8
Depreciation	36.1			33.6			30.2
Other operating expense	5.1			4.2			5.1
Total Expenses	87.8			89.9			85.1
Other Income (Expense)
Net gain (loss) on asset dispositions	1.7			—			(0.6		)
Interest expense, net	(24.5		)	(25.4		)	(23.3		)
Other (expense) income	(6.1		)	7.2			(2.0		)
Share of affiliates' earnings (pre-tax)	(18.3		)	0.5			(6.0		)
Segment Profit	$	32.7		$	60.7		$	30.5
Investment Volume	$	200.1		$	140.8		$	107.5

30

The following table summarizes fleet activity for Rail International railcars for the years indicated:

	2012		2011		2010
Beginning balance	20,927		20,432		20,033
Cars added	1,582		841		662
Cars scrapped or sold	(669	)	(346	)	(263	)
Ending balance	21,840		20,927		20,432
Utilization rate at year end	95.1	%	97.1	%	95.7	%
Active railcars at year end	20,763		20,321		19,554
Average (monthly) active railcars	20,465		19,834		19,249

Comparison of Year Ended December 31, 2012 to Year Ended December 31, 2011

Segment Profit

Rail International's segment profit was $32.7 million in 2012 compared to $60.7 million in 2011. The 2012 results included losses of $22.9 million related to certain interest rate swaps at AAE compared to gains of $0.3 million in 2011. Segment profit in 2011 also included $3.2 million from the favorable resolution of a litigation matter. Excluding the effect of these items from each period, Rail International's segment profit decreased $1.6 million, primarily due to the unfavorable foreign exchange impact of a stronger U.S. dollar during 2012 and the unfavorable remeasurement of an embedded foreign currency derivative, partially offset by lower maintenance expense and higher operating income at AAE.

AAE holds multiple interest rate swaps intended to hedge interest rate risk associated with existing and forecasted floating rate debt issuances. Some of these swaps do not qualify for hedge accounting and as a result, changes in their fair values are recognized currently in income. Unrealized gains and losses resulting from these changes are primarily driven by changes in the underlying benchmark interest rates. AAE’s earnings may be impacted by future gains or losses associated with these swaps. Unrealized losses in 2012 were $9.4 million and unrealized gains in 2011 were $0.3 million. Additionally, in 2012, AAE refinanced a portion of its debt and terminated an associated swap at a loss. GATX’s portion of the loss was $13.5 million, which was included in share of affiliates’ earnings.

31

Revenues

Lease income increased $0.7 million, primarily due to an average of approximately 630 more railcars on lease at higher lease rates, substantially offset by the foreign exchange rate effects of a stronger U.S. dollar. Other income decreased $1.3 million, primarily due to lower revenue from customer liability repairs.

Expenses

Maintenance expense decreased $5.5 million, primarily due to the foreign exchange effects of a stronger U.S. dollar. Depreciation increased $2.5 million, primarily due to investment activity, including capitalized wheelsets in Europe, partially offset by the foreign exchange effects of a stronger U.S. dollar.

Other Income (Expense)

Net gain on asset dispositions increased $1.7 million, primarily due to higher scrapping gains as a result of more railcars and wheelsets being scrapped. Interest expense decreased $0.9 million, as interest income on cash deposits more than offset the effect of higher expenses from increased debt levels. Other expense increased $13.3 million of which $3.2 million was due to the favorable resolution of a litigation matter in Europe in 2011. The remaining variance was primarily due to the unfavorable remeasurement of an embedded foreign currency derivative (related to certain non-functional currency lease contracts) and higher legal defense costs. Excluding the impact of the interest rate swaps at AAE from each period, affiliates’ earnings increased $4.4 million, primarily due to higher operating income at AAE, which included lower depreciation expense of $6.2 million due to a change in railcar depreciation policy enacted in 2012 that extended depreciable lives and increased estimated salvage values.

Investment Volume

During 2012, Rail International acquired 1,580 railcars compared to 840 railcars in 2011.

Comparison of Year Ended December 31, 2011 to Year Ended December 31, 2010

Segment Profit

Rail International's segment profit was $60.7 million in 2011, an increase of $30.2 million from 2010. The 2011 results include unrealized gains of $0.3 million representing the change in the fair value of the AAE interest rate swaps and $3.2 million from the favorable resolution of a litigation matter. The 2010 results included unrealized losses of $10.4 million related to the AAE interest rate swaps. Excluding these items from each period, segment profit increased $16.3 million, primarily due to higher lease income, the favorable foreign exchange impact of a weaker average U.S. dollar in 2011 and the favorable remeasurement of an embedded foreign currency derivative.

Revenues

Lease income increased $18.7 million, primarily due to an average of approximately 585 more railcars on lease, higher lease rates, and the foreign exchange rate effects of a weaker U.S. dollar. Other income increased $2.1 million, primarily due to higher revenue from compensation for damaged railcars.

Expenses

Maintenance expense increased $2.3 million, primarily due to higher volumes of underframe and tank revisions, partially offset by lower current repairs and a fewer number of wheelsets expensed. Depreciation increased $3.4 million, primarily due to investment activity, including capitalized wheelsets. Other operating expense decreased $0.9 million, primarily due to lower storage and miscellaneous operating costs.

32

Other Income (Expense)

Net gain on asset dispositions increased $0.6 million, primarily due to gain on sale of locomotives in 2011. Interest expense increased $2.1 million, primarily due to higher debt balances resulting from investment activity. Other expense decreased $9.2 million, primarily due to the favorable settlement of a litigation matter in 2011, the favorable fair value adjustment of an embedded foreign currency derivative in 2011, and net remeasurement gains on non-functional currency assets and liabilities in 2011 compared to net losses in 2010. Excluding the impact of the interest rate swaps at AAE from each period, affiliates’ earnings decreased $4.2 million, primarily due to a 2011 charge related to a bankrupt customer and the absence of a favorable maintenance reserve adjustment in 2010, both at AAE.

Investment Volume

During 2011, Rail International acquired 840 railcars compared to 650 railcars in 2010.

International Railcar Regulatory Matters

Consistent with changes in European railcar industry practices and regulatory directives announced after the 2009 accident in the city of Viareggio, Italy, GATX Rail Austria GmbH (an indirect subsidiary of the Company, “GATX Rail Austria”) and its subsidiaries have implemented a modified wheelset maintenance and inspection program, which includes the installation of new wheelsets in certain cases. Future industry actions and regulatory directives may require further modifications of the maintenance and inspection practices of GATX Rail Austria and its subsidiaries. GATX Rail Austria and its subsidiaries will continue to incur higher maintenance expenses and capital costs over the next several years as implementation of the wheelset program continues. It is expected that the wheelset maintenance and inspection program will lead to higher future depreciation expense, but lower maintenance costs. The complete scope and cost of any potential future maintenance initiatives, in addition to those implemented as part of the modified wheelset maintenance and inspection program, are not fully known at this time. The Company does not currently expect that the costs associated with the modified wheelset maintenance and inspection program and other potential initiatives will be material to the Company's financial position, liquidity or results of operations.

ASC

Segment Summary

Demand for ASC’s services remained strong throughout 2012, driven by the continued recovery in steel manufacturing and the associated demand for iron ore. In mid-2011, a work stoppage resulting from a strike by the licensed crew members represented by the American Maritime Officers (AMO) union resulted in lost tonnage and incremental expenses for vessel lay-up and non-productive labor costs. In late 2011, ASC executed a new five-year collective bargaining agreement with the AMO that was ratified by the workers in early 2012. ASC carried a total of 29.7 million net tons of freight and deployed 14 vessels in 2012 compared to 28.4 million net tons and 14 vessels in 2011. Shipping volumes are expected to decrease slightly in 2013. Additionally, record low water levels on the Great Lakes may negatively impact ASC's operations.

33

ASC’s segment results are summarized below (in millions):

	Years Ended December 31
	2012			2011			2010
Revenues
Lease revenue	$	4.3		$	4.2		$	4.1
Marine operating revenue	239.1			212.2			185.3
Total Revenues	243.4			216.4			189.4
Expenses
Maintenance expense	21.7			19.4			12.9
Marine operating expense	160.3			151.7			129.1
Depreciation	11.9			11.3			10.7
Operating lease expense	3.8			—			—
Other operating expense	(0.3		)	—			—
Total Expenses	197.4			182.4			152.7
Other Income (Expense)
Net gain on asset dispositions	—			1.1			—
Interest expense, net	(7.1		)	(7.7		)	(8.3		)
Other (expense) income	(1.4		)	(0.1		)	0.2
Segment Profit	$	37.5		$	27.3		$	28.6
Investment Volume	$	12.6		$	17.4		$	9.0

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Comparison of Year Ended December 31, 2012, to Year Ended December 31, 2011

Segment Profit

ASC's segment profit for 2012 was $10.2 million higher primarily due to higher iron ore freight volumes and rates, and the absence of the negative impacts of the labor work stoppage in the prior year.

Revenues

Marine operating revenue increased $26.9 million primarily due to higher freight volumes, particularly iron ore, as well as higher freight rates and fuel surcharges. In accordance with certain contract provisions, ASC is able to recover a large portion of fuel cost increases from its customers.

Expenses

Maintenance expense increased $2.3 million, primarily due to higher repairs on several vessels. Marine operating expenses were $8.6 million higher than the prior year. Higher fuel and wage costs in 2012, primarily due to more vessels operating, were substantially offset by the absence of costs related to the labor work stoppage in the prior year. Operating lease expense in 2012 relates to the inception of the lease for ASC's new tug-barge vessel.

Other Income (Expense)

In 2011, a gain of $1.1 million was recognized upon the return of a vessel at the end of its lease term. Interest expense was lower due to lower rates and the absence of interest on the expired capital lease. Other expenses in the current year primarily consisted of reserves and settlements for ongoing asbestos-related litigation matters.

Investment Volume

ASC's investments for each year primarily consisted of structural and mechanical upgrades to its vessels.

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Comparison of Year Ended December 31, 2011, to Year Ended December 31, 2010

Segment Profit

ASC’s segment profit for 2011 was $1.3 million lower than the prior year, primarily due to higher maintenance costs as well as incremental expenses related to the aforementioned work stoppage. ASC operated 14 vessels during 2011 compared to 13 vessels during 2010.

Revenues

Marine operating revenues increased $26.9 million in 2011 due to a combination of higher freight rates, a favorable mix of freight volume and higher fuel surcharges, which offset higher fuel costs. While total net tons carried in 2011 of 28.4 million represented a slight increase of 0.4 million, or 1.4%, from 2010, volume of iron ore, a higher margin commodity, increased 2.4 million net tons.

Expenses

Maintenance expense was $6.5 million higher than the prior year, primarily due to more extensive winter work and more vessels operating. Marine operating expenses increased $22.6 million, primarily due to increased fuel costs, which are recoverable through fuel surcharges, higher operating costs due to more vessels operating and expenses related to the aforementioned work stoppage.

Other Income (Expense)

In 2011, a gain of $1.1 million was recognized upon the return of a vessel at the end of its lease term. Interest expense was lower due to lower rates and lower capital lease interest.

ASC Regulatory Issues

On December 8, 2011, the United States Environmental Protection Agency (the “EPA”) published for comment a new draft Vessel General Permit (“VGP”) under the Clean Water Act (“CWA”) that would establish numeric effluent limits for the discharge of living organisms in ballast water for certain commercial vessels. The limits are based on the International Maritime Organization standard. This draft VGP will replace the current VGP issued in December 2008 that will expire on December 19, 2013. The completed draft VGP is under review by the Congressional Office of Management and Budget and the EPA has stated that it intends to publish the final VGP by March 15, 2013, with an effective date of December 19, 2013.

Once approved, the new VGP will not impose numeric treatment limits for ballast water discharges on existing Great Lakes bulk carrier vessels built before January 1, 2009, that operate exclusively in the Great Lakes upstream of the Welland Canal (the “Exempt Vessels”), essentially exempting all but one of ASC's vessels.  However, the new VGP imposes best management practices for the management of ballast water discharges for Exempt Vessels that are substantially similar to those in the current VGP. The new VGP will include revised state specific ballast water treatment standards as allowed by the Section 401 certification process of the CWA.

The EPA has proposed a staggered implementation schedule for non-Exempt Vessels to achieve the treatment limits of the new VGP. Non-Exempt Vessels must meet the standards at the time of their first drydocking after January 1, 2014, or January 1, 2016, (depending upon vessel size). New vessels constructed after January 1, 2012, that are subject to the treatment limits, must meet those limits upon entering waters of the United States following the effective date of the new VGP.

PORTFOLIO MANAGEMENT

Segment Summary

Portfolio Management focuses on maximizing the value of its existing portfolio of wholly-owned and managed assets, including identifying opportunities to remarket certain assets. Portfolio Management also seeks to maximize value from its joint ventures and to selectively invest in domestic marine and container related assets.

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Portfolio Management's segment profit was significantly impacted by the contribution of the Rolls-Royce & Partners Finance companies. The Rolls-Royce & Partners Finance companies (collectively the “RRPF Affiliates”) are a collection of fourteen 50%-owned domestic and foreign joint ventures with Rolls-Royce plc (or affiliates thereof, collectively “Rolls-Royce”), a leading manufacturer of commercial aircraft jet engines. Segment profit includes earnings from the RRPF Affiliates of $44.8 million, $38.6 million and $31.1 million for 2012, 2011 and 2010 respectively. While the RRPF Affiliates are expected to continue to produce strong operating results and gains from engine sales, marine operations will likely continue to be negatively impacted by inconsistent demand and vessel overcapacity in the international shipping markets, further pressuring charter rates. These conditions are expected to affect both wholly-owned and affiliate vessels.

In 2012, GATX's gas compression equipment leasing affiliate, Enerven Compression, LLC, sold substantially all of its assets and is in the process of liquidation. In connection with this disposition, GATX recognized an impairment loss of $14.8 million, which is reflected in share of affiliates' earnings. In 2011, GATX's Clipper Fourth affiliates were dissolved. In connection with the dissolutions, GATX contributed $62.1 million, representing its share of the affiliates' outstanding debt, took ownership of six chemical parcel tankers with an aggregate net book value of $88.8 million and recognized an impairment loss of $5.2 million, which is reflected in share of affiliates' earnings.

Portfolio Management's total asset base was $797.4 million at December 31, 2012 compared to $846.6 million at December 31, 2011, and $744.4 million at December 31, 2010. The estimated net book value equivalent of assets managed by Portfolio Management for third parties was $143.2 million at December 31, 2012.

Portfolio Management’s segment results are summarized below (in millions):

	Years Ended December 31
	2012			2011			2010
Revenues
Lease revenue	$	37.6		$	44.5		$	43.0
Marine operating revenue	26.4			17.8			13.1
Other revenue	2.8			2.0			1.0
Total Revenues	66.8			64.3			57.1
Expenses
Marine operating expense	22.1			13.9			8.9
Depreciation	21.7			19.1			17.5
Operating lease expense	0.2			1.4			1.4
Other operating expense	0.9			4.3			1.3
Total Expenses	44.9			38.7			29.1
Other Income (Expense)
Net gain on asset dispositions	19.2			12.6			12.1
Interest expense, net	(27.7		)	(29.6		)	(28.2		)
Other income (expense)	3.4			2.8			(0.1		)
Share of affiliates' earnings (pre-tax)	33.4			36.2			36.9
Segment Profit	$	50.2		$	47.6		$	48.7
Investment Volume	$	83.5		$	172.0		$	97.4

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Comparison of Year Ended December 31, 2012, to Year Ended December 31, 2011

Segment Profit

Portfolio Management's segment profit of $50.2 million was $2.6 million higher than the prior year. The increase was primarily due to higher net gains on asset dispositions, higher earnings from the RRPF Affiliates and lower operating costs, partially offset by the impairment loss at the Enerven affiliate.

Revenues

Lease income was $6.9 million lower than the prior year, primarily due to the sale of barges and other equipment. Marine operating revenue was $8.6 million higher than prior year, primarily due to a full year of income from the six vessels received from the former Clipper Fourth affiliates late in 2011. Other income was $0.8 million higher than prior year, primarily due to interest income from new loans.

Expenses

Marine operating expense increased $8.2 million and depreciation expense increased $2.6 million, both primarily due to a full year of expense for the six vessels. Operating lease expense decreased $1.2 million, primarily due to the sale of barges at the end of the prior year and the early termination of a lease in the current year. Other operating expense decreased $3.4 million, primarily due to a $2.6 million decrease in other operating costs for owned and pooled barges and higher reversals of provisions for losses, which were $1.2 million in 2012 and $0.4 million in 2011. In 2012, a reversal was recorded upon the sale of a non-performing leveraged lease investment.

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Other Income (Expense)

Net gains on asset dispositions increased $6.6 million, primarily due to a $5.3 million residual sharing fee from a sale in the managed portfolio and lower asset impairment charges, partially offset by a $2.1 million decrease in gains on the sale of owned equipment. Impairment charges in 2011 were primarily related to further impairments of a corporate aircraft on lease and a helicopter held for sale. Interest expense decreased $1.9 million, primarily due to lower rates.

Share of affiliates' earnings was $2.8 million lower than the prior year. The variance was significantly impacted by impairment losses and remarketing gains in each year. Earnings in 2012 included impairments and operating losses from the Enerven affiliate of $18.9 million and earnings of $44.8 million from the RRPF Affiliates, including $16.7 million of asset remarketing income. Earnings in 2011 included operating and impairment losses from the Clipper Fourth affiliates of $8.5 million, operating losses from the Enerven affiliate of $3.2 million and earnings from the RRPF Affiliates of $38.6 million, including $9.7 million of asset remarketing income.

Investment Volume

Investment volume in 2012 primarily consisted of $37.0 million in barges and other marine equipment, $29.7 million of investments in affiliates, and $14.9 million in container assets. Investment volume in 2011 primarily consisted of $113.4 million of investments in affiliates, $31.9 million in senior secured loans and $26.0 million in barges. The 2011 affiliate investments included $62.1 million related to the wind-up and dissolution of the Clipper Fourth affiliates and $20.4 million related to investments in container assets.

Comparison of Year Ended December 31, 2011, to Year Ended December 31, 2010

Segment Profit

Portfolio Management's segment profit of $47.6 million in 2011 was $1.1 million lower than 2010. The decrease was primarily due to higher asset impairment charges and operating expenses in 2011, partially offset by higher asset remarketing income.

Revenues

Lease income was $1.5 million higher than 2010, primarily due to income from new leases. Marine operating revenue was $4.7 million higher than 2010, primarily due to income from six vessels acquired from an affiliate late in 2011. Other income was $1.0 million higher than 2010, primarily due to interest income from new loans.

Expenses

Marine operating expense increased $5.0 million and depreciation expense increased $1.6 million from 2010, primarily due to expense from the six acquired vessels. Other operating expense increased $3.0 million, primarily due to a $1.7 million increase in other operating costs for owned and pooled barges.

Other Income (Expense)

Net gain on asset dispositions increased $0.5 million, primarily due to a $5.6 million increase in disposition gains on the sale of barges and other equipment in 2011, partially offset by lower residual sharing fees on sales in the managed portfolio, which were $4.4 million in 2011 and $7.6 million in 2010, and higher asset impairment charges. Impairment charges in 2010 were primarily related to the impairment of a corporate aircraft on lease. Charges in 2011 were primarily related to a impairment of the helicopter held for sale, as well as impairments of the corporate aircraft and an investment fund. Interest expense was $1.4 million higher than 2010, primarily due to higher average debt balances offset by lower rates. Other income was $2.9 million higher than 2010, primarily due to gains on the sale of securities and investment fund gains in 2011.

Share of affiliates' earnings decreased $0.7 million from 2010, primarily due to impairment losses in 2011 at the Clipper Fourth affiliates and lower earnings from the Clipper Third affiliate resulting from the sales of vessels in each year, partially offset by increased earnings from the RRPF Affiliates. In 2011, the RRPF Affiliates contributed earnings of $38.6 million, including $9.7 million of asset remarketing income, compared to $31.1 million of earnings in 2010, including $3.9 million of asset remarketing income.

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OTHER

Other is comprised of selling, general and administrative expenses (“SG&A”), unallocated interest expense and miscellaneous income and expense not directly associated with the reporting segments and eliminations.

Components of Other are outlined below (in millions):

	Years Ended December 31
	2012			2011		2010
Selling, general and administrative expense	$	160.2		$	155.3	$	134.8
Unallocated interest expense, net	5.4			4.5		3.5
Other expense (income) (including eliminations)	(1.3		)	0.3		(7.8		)

SG&A, Unallocated Interest and Other

In 2012, SG&A of $160.2 million increased $4.9 million, or 3.2%, from 2011. The increase was primarily due to higher compensation and post-employment benefits expenses offset by lower outside services expenses. In 2011, SG&A of $155.3 million increased $20.5 million, or 15.2%, from 2010. The increase was driven by higher compensation expenses, IT expenditures and outside services spending. The increases in compensation expense in 2011 through 2012 were largely attributable to a gradual return to prior staffing levels and historical compensation practices.

Unallocated interest expense (the difference between external interest expense and amounts allocated to the reporting segments in accordance with assigned leverage targets) in any year is affected by the Company’s consolidated leverage position as well as the timing of debt issuances and segment investments.

Other expense was immaterial for 2012 and 2011. Other expense in 2010 primarily reflected a $6.5 million benefit from the resolution of a litigation matter and a $1.7 million recovery on a previously impaired money market fund investment, partially offset by a $2.0 million addition to an environmental liability related to a sold facility. Eliminations were immaterial for all periods presented.

Consolidated Income Taxes

In 2012, GATX's effective tax rate was 18.2% compared to 27.1% in 2011 and 11.8% in 2010. The current year included $15.5 million of previously unrecognized tax benefits resulting from the expiration of the applicable statute of limitations. Additionally, the 2012 tax provision reflected the benefit of the utilization of $13.7 million in foreign tax credits offset by $6.3 million of tax expenses associated with the incremental taxable income and withholding taxes on foreign dividends repatriated during the year. In 2011, a $4.8 million benefit was recognized attributable to the reversal of accruals associated with the close of a domestic tax audit. 2010 included a $9.5 million benefit attributable to the reversal of accruals resulting from the close of certain domestic and foreign tax audits. Excluding the impact of the tax adjustments noted herein, GATX's effective tax rate was 34.1% in 2012, 31.5% in 2011 and 28.0% in 2010. The difference in effective tax rates was driven by the mix of domestic and foreign earnings, which are taxed at lower rates.

Separately, income taxes for GATX's affiliates in 2012, 2011 and 2010 were $2.0 million, $8.2 million and $9.6 million, respectively. These amounts were favorably impacted by deferred tax benefits of $4.6 million, $4.1 million and $1.9 million for 2012, 2011 and 2010, respectively, associated with income tax rate reductions enacted in the United Kingdom.

See Note 12 to the consolidated financial statements for additional information on income taxes.

BALANCE SHEET DISCUSSION

Assets

Assets were $6.1 billion at December 31, 2012, compared to $5.9 billion at December 31, 2011. In addition to assets recorded on its balance sheet, GATX utilized approximately $0.9 billion of off balance sheet assets, primarily railcars that were financed with operating

40

leases and therefore were not recorded on the balance sheet. The off balance sheet assets represent the estimated present value of GATX’s committed future operating lease payments.

The following table presents assets by segment as of December 31 (in millions):

	2012						2011
	On Balance Sheet		Off Balance Sheet		Total		On Balance Sheet		Off Balance Sheet		Total
Rail North America	$	3,601.1	$	863.5	$	4,464.6	$	3,540.2	$	884.5	$	4,424.7
Rail International	1,105.8		—		1,105.8		903.2		—		903.2
ASC	284.2		21.0		305.2		276.1		—		276.1
Portfolio Management	797.4		—		797.4		844.0		2.6		846.6
Other	266.9		—		266.9		294.0		—		294.0
	$	6,055.4	$	884.5	$	6,939.9	$	5,857.5	$	887.1	$	6,744.6

Gross Receivables

Receivables of $361.3 million at December 31, 2012, decreased $80.7 million from December 31, 2011, primarily due to the sale of leveraged lease investments in 2012.

Allowance for Losses

The purpose of the allowance is to provide an estimate of credit losses inherent in reservable assets. Reservable assets are divided into two categories: rent and other receivables, which represent short-term trade billings, and loans and finance lease receivables. Reserves for rent and other receivables are based on historical loss experience and judgments about the impact of present economic conditions, collateral values, and the state of the markets in which GATX operates. In addition, GATX may establish specific reserves for known troubled accounts. Reserve estimates for loans and finance lease receivables are generally evaluated on a customer specific basis, considering the same factors as rent and other receivables as well as a regular assessment of each customer’s specific credit situation. Amounts are charged against the allowance when they are deemed to be uncollectible. There were no material changes in estimation methods or assumptions for the allowance during 2012. GATX believes that the allowance is adequate to cover losses inherent in its reservable assets as of December 31, 2012. Since the allowance is based on judgments and estimates, actual losses incurred may differ from the estimate.

As of December 31, 2012, general allowances for trade receivables were $3.4 million, or 3.9% of rent and other receivables, compared to $2.8 million, or 3.7%, at December 31, 2011. Specific allowances for finance leases were $1.2 million at December 31, 2012, compared to $9.0 million at December 31, 2011. The decrease in specific allowances was primarily related to the sale of a non-performing leveraged lease investment.

The following summarizes changes in GATX’s allowance for losses as of December 31 (in millions):

	2012			2011
Beginning balance	$	11.8		$	11.6
(Reversal) provision for losses	(0.6		)	0.2
Charges to allowance	(7.8		)	(0.5		)
Recoveries and other, including foreign exchange adjustments	1.2			0.5
Ending balance	$	4.6		$	11.8

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Operating Assets and Facilities

Net operating assets and facilities increased $295.1 million from 2011. The increase was primarily due to new investments of $709.8 million and foreign exchange rate effects of $34.8 million, partially offset by depreciation expense of $242.0 million, dispositions of $127.4 million and sale-leasebacks of $79.4 million.

Investments in Affiliated Companies

Investments in affiliated companies decreased $11.8 million in 2012, primarily due to dividend and capital distributions of $65.7 million, partially offset by new investments of $29.7 million, and equity earnings of $21.6 million.

The following table shows GATX’s investment in affiliated companies by segment as of December 31 (in millions):

	2012		2011
Rail North America	$	46.9	$	54.0
Rail International	77.2		88.2
Portfolio Management	377.9		371.6
	$	502.0	$	513.8

See Note 6 to the consolidated financial statements for additional information about investments in affiliated companies.

Goodwill

In 2012 and 2011, changes in the balance of GATX’s goodwill, all of which is attributable to the Rail North America and Rail International segments, resulted solely from changes in foreign currency exchange rates. GATX tested its goodwill for impairment in the fourth quarter of 2012 and no impairment was indicated.

Debt

Total debt increased $20.8 million from the prior year, primarily due to long-term debt issuances of $448.8 million and net borrowings of $243.3 million from commercial paper and bank credit facilities, partially offset by scheduled maturities and principal payments of $671.2 million.

The following table sets forth the details of GATX’s long-term debt issuances in 2012 ($ in millions):

Type of Debt	Term	Interest Rate	Principal Amount
Recourse Unsecured	10.0 Years	4.75% Fixed	$	250.0
Recourse Unsecured	5.0 Years	1.88% Floating (a)	100.0
Recourse Unsecured	7.3 Years	2.47% Floating (a)	63.8
Recourse Unsecured	5.5 Years	2.25% Floating (a)	35.0
			$	448.8

________

(a) Reflects interest rate at December 31, 2012

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The following table summarizes the carrying value of GATX’s debt by major component, including off balance sheet debt, as of December 31, 2012 (in millions):

	Secured		Unsecured		Total
Commercial paper and borrowings under bank credit facilities	$	—	$	273.6	$	273.6
Recourse debt	293.4		2,859.0		3,152.4
Nonrecourse debt	130.6		—		130.6
Capital lease obligations	11.3		—		11.3
Balance sheet debt	435.3		3,132.6		3,567.9
Recourse off balance sheet debt (a)	730.1		—		730.1
Nonrecourse off balance sheet debt (a)	154.4		—		154.4
	$	1,319.8	$	3,132.6	$	4,452.4

________

(a) Off balance sheet debt represents the estimated present value of committed operating lease payments and is equal to the amount reported as off balance sheet assets.

Equity

Total equity increased $116.9 million from the prior year, primarily due to $137.3 million of net income, $14.1 million from the effects of share based compensation, $11.7 million of unrealized gains on derivatives and $25.0 million of foreign currency translation adjustments due to the balance sheet effects of a weaker U.S. dollar, partially offset by $59.1 million of dividends, and $12.4 million from the effect of post-retirement benefit plan adjustments.

CASH FLOW DISCUSSION

GATX generates a significant amount of cash from its operating activities and proceeds from its investment portfolio, which is used to service debt, fund portfolio investments and capital additions, and pay dividends. Cash flows from operations and portfolio proceeds are impacted by changes in working capital and the timing of asset dispositions. As a result, cash flow components may vary materially from quarter to quarter and year to year. As of December 31, 2012, GATX had unrestricted cash balances of $234.2 million.

Net Cash Provided by Operating Activities

Net cash provided by operating activities of $370.2 million increased $63.4 million compared to 2011. The increase was primarily driven by higher Rail North America lease income, ASC segment profit and dividends from affiliates, as well as changes in working capital.

Portfolio Investments and Capital Additions

Portfolio investments and capital additions primarily consist of purchases of operating assets, investments in joint ventures, loans and capitalized asset improvements. Portfolio investments and capital additions of $770.0 million increased $155.4 million compared to 2011. The increase was primarily driven by significantly higher railcar investments. The timing of investments is dependent on purchase commitments, transaction opportunities and market conditions.

The following table presents portfolio investments and capital additions by segment for the years ended December 31 (in millions):

	2012		2011		2010
Rail North America	$	465.9	$	280.5	$	367.1
Rail International	200.1		140.8		107.5
ASC	12.6		17.4		9.0
Portfolio Management	83.5		172.0		97.4
Other	7.9		3.9		4.1
	$	770.0	$	614.6	$	585.1

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Portfolio Proceeds

Portfolio proceeds primarily consist of loan and finance lease receipts, proceeds from sales of operating assets and sales of securities, and capital distributions from affiliates. The increase in proceeds from sales of operating assets in 2012 compared to 2011 was primarily due to sales of leveraged lease investments and increased sales of North American railcars and locomotives. The increase in capital distributions from affiliates in 2012 compared to 2011 was primarily due to the sale of affiliate vessels and railcars.

Portfolio proceeds were as follows for the years ended December 31 (in millions):

	2012		2011		2010
Finance lease rents received, net of earned income and leveraged lease nonrecourse debt service	$	13.8	$	24.1	$	12.6
Loan principal received	4.2		2.2		––
Proceeds from sales of operating assets	235.3		114.8		47.3
Other investment distributions and sales of securities	3.7		0.2		0.1
Capital distributions from affiliates	30.6		6.1		18.1
Other portfolio proceeds	1.3		6.7		6.2
	$	288.9	$	154.1	$	84.3

Other Investing Activity

Proceeds from sales of other assets for all periods primarily related to the scrapping of railcars. In 2012 and 2010, Rail North America completed sale-leasebacks for 1,062 and 947 railcars, respectively. In 2012, 2011 and 2010, Rail North America acquired 47, 2,721 and 292 railcars, respectively, that were previously leased-in. Other investing activity in 2010 consisted of recoveries from a money market fund investment that became illiquid in 2008.

GATX’s restricted cash primarily includes contractually required amounts maintained for six wholly-owned bankruptcy-remote, special-purpose corporations ("SPCs") and prior to 2012, escrowed funds subject to a litigation matter in Europe. The SPCs were formed in prior years to finance railcars on a structured, nonrecourse basis. Changes in restricted cash largely represent the aggregate net change in the cash of these entities resulting from operating and financing activities. Additionally, in 2011, approximately $8 million of restricted cash was disbursed upon the settlement of the litigation matter in Europe and in 2010, $30.5 million in one-time contributions were made to the SPCs. The contributions are expected to limit payment shortfalls in the future, thus preventing related interest and penalties that might otherwise be incurred under the terms of the applicable financing arrangements.

Other investing activity was as follows for the years ended December 31 (in millions):

	2012			2011			2010
Purchases of leased-in assets	$	(1.3	)	$	(61.1	)	$	(5.3	)
Proceeds from sales of other assets	28.4			42.2			30.4
Proceeds from sale-leasebacks	104.9			—			79.0
Net decrease (increase) in restricted cash	5.5			21.4			(23.4		)
Other	—			—			2.4
	$	137.5		$	2.5		$	83.1

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Net Cash provided by Financing Activities

Net cash (used in) provided by financing activities was as follows for the years ended December 31 (in millions):

	2012			2011			2010
Net proceeds from issuances of debt (original maturities longer than 90 days)	$	445.2		$	790.3		$	573.8
Repayments of debt (original maturities longer than 90 days)	(671.2		)	(312.8		)	(344.2		)
Net increase (decrease) in debt with original maturities of 90 days or less	243.3			(85.0		)	46.8
Payments on capital lease obligations	(3.0		)	(18.5		)	(12.8		)
Cash dividends	(58.8		)	(56.0		)	(53.5		)
Other	4.6			5.2			0.9
	$	(39.9	)	$	323.2		$	211.0

LIQUIDITY AND CAPITAL RESOURCES

General

GATX funds its investments and meets its debt, lease and dividend obligations through available cash balances, cash generated from operating activities, portfolio proceeds, sales of other assets, commercial paper issuances, committed revolving credit facilities and the issuance of secured and unsecured debt. Cash from operations and commercial paper issuances are the primary sources of cash used to fund daily operations. GATX utilizes both domestic and international capital markets and banks for its debt financing needs.

Contractual and Other Commercial Commitments

At December 31, 2012, GATX’s contractual commitments, including debt maturities, lease payments, and portfolio investments were (in millions):

	Payments Due by Period
	Total		2013		2014		2015		2016		2017		Thereafter
Recourse debt	$	3,147.2	$	452.1	$	455.4	$	521.4	$	618.7	$	233.4	$	866.2
Nonrecourse debt	133.9		33.6		58.2		31.1		8.2		2.8		—
Commercial paper and credit facilities	273.6		273.6		—		—		—		—		—
Capital lease obligations	13.1		3.1		3.1		3.1		2.7		1.1		—
Operating leases — recourse	982.9		115.3		119.7		139.7		101.5		89.3		417.4
Operating leases — nonrecourse	201.0		27.9		27.4		26.0		21.9		22.5		75.3
Portfolio investments *	1,466.9		517.5		391.4		352.0		198.2		1.1		6.7
	$	6,218.6	$	1,423.1	$	1,055.2	$	1,073.3	$	951.2	$	350.2	$	1,365.6

__________

(*) Primarily railcar purchase commitments.

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GATX’s contractual cash receipts arising from loans and future lease payments from finance leases, and future rental receipts from noncancelable operating leases as of December 31, 2012, were (in millions):

	Contractual Cash Receipts by Period
	Total		2013		2014		2015		2016		2017		Thereafter
Finance leases	$	327.3	$	40.2	$	38.7	$	35.9	$	31.3	$	29.4	$	151.8
Operating leases	2,875.2		784.4		594.2		465.8		346.1		223.0		461.7
Loans	27.2		4.8		4.8		4.9		4.7		7.1		0.9
Total	$	3,229.7	$	829.4	$	637.7	$	506.6	$	382.1	$	259.5	$	614.4

Principal sources and uses of cash were as follows for the years ended December 31 (in millions):

	2012			2011			2010
Principal sources of cash
Net cash provided by operating activities	$	370.2		$	306.8		$	243.7
Portfolio proceeds	288.9			154.1			84.3
Other asset sales	28.4			42.2			30.4
Proceeds from sale-leasebacks	104.9			—			79.0
Proceeds from issuance of debt, commercial paper and credit facilities	688.5			790.3			620.6
	$	1,480.9		$	1,293.4		$	1,058.0
Principal uses of cash
Portfolio investments and capital additions	$	(770.0	)	$	(614.6	)	$	(585.1	)
Repayments of debt, commercial paper and credit facilities	(671.2		)	(397.8		)	(344.2		)
Purchases of leased-in assets	(1.3		)	(61.1		)	(5.3		)
Payments on capital lease obligations	(3.0		)	(18.5		)	(12.8		)
Cash dividends	(58.8		)	(56.0		)	(53.5		)
	$	(1,504.3	)	$	(1,148.0	)	$	(1,000.9	)

2013 Liquidity Outlook

GATX expects that it will be able to meet its contractual obligations for 2013 through a combination of projected cash from operations, portfolio proceeds, use of its revolving credit facilities, and available cash at December 31, 2012. Additionally, GATX anticipates that portfolio investments in 2013 will likely exceed contractual commitments as GATX expects to opportunistically pursue other strategic investments. However, adverse changes in the economic environment or capital markets could adversely impact GATX's liquidity position and there can be no assurances that these sources of cash will be adequate to fund its operations and contractual commitments.

Short-Term Borrowings

GATX primarily uses short-term borrowings as a source of working capital and to temporarily fund differences between operating cash flows and portfolio proceeds, and capital investments and debt maturities. GATX does not maintain or target any particular level of short-term borrowings on a permanent basis. Rather, short-term borrowings tend to follow a cyclical process of increasing over time until they are paid down using the proceeds from a long-term debt issuance and then the process begins again.

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The following tables provide certain information regarding GATX’s short-term borrowings as of December 31, 2012 ($ in millions):

	North America (a)			Europe (b)
Balance as of December 31	$	185.0		$	88.6
Weighted average interest rate	0.5		%	1.2		%
Euro/Dollar exchange rate	n/a			1.3193
Average monthly amount outstanding during year	$	54.9		$	67.8
Weighted average interest rate	0.5		%	1.8		%
Average Euro/Dollar exchange rate	n/a			1.2860
Average monthly amount outstanding during 4th quarter	$	97.0		$	90.2
Weighted average interest rate	0.5		%	1.5		%
Average Euro/Dollar exchange rate	n/a			1.2979
Maximum month-end amount outstanding	$	185.0		$	97.8
Euro/Dollar exchange rate	n/a			1.3127

__________

(a) Short-term borrowings in North America consist solely of commercial paper issued in the U.S.

(b) Short-term borrowings in Europe consist solely of borrowings under bank credit facilities.

GATX has a $560 million senior unsecured revolving credit facility that expires in May 2015. As of December 31, 2012, availability under the facility was $365.3 million, with $185.0 million of commercial paper and $9.7 million of letters of credit issued, both of which are backed by the facility. GATX also has unsecured lines of credit in Europe totaling $112.1 million. At December 31, 2012, availability under these lines of credit was $23.5 million.

Restrictive Covenants

GATX’s $560 million revolving credit facility contains various restrictive covenants, including requirements to maintain a minimum fixed charge coverage ratio and an asset coverage test. GATX’s ratio of earnings to fixed charges, as defined in this facility, was 1.8 for the period ended December 31, 2012, in excess of the minimum covenant ratio of 1.2. At December 31, 2012, GATX was in compliance with all covenants and conditions of the facility. Certain of GATX’s bank term loans have the same financial covenants as the facility.

The indentures for GATX’s public debt also contain various restrictive covenants, including limitation on liens provisions, that limit the amount of additional secured indebtedness that GATX may incur to $918.6 million as of December 31, 2012.  Additionally, certain exceptions to the covenants permit GATX to incur an unlimited amount of purchase money and nonrecourse indebtedness. At December 31, 2012, GATX was in compliance with all covenants and conditions of the indentures.

The loan agreements for certain of GATX’s wholly-owned European Rail subsidiaries (collectively, “GRE”) also contain restrictive covenants, including leverage and cash flow covenants specific to those subsidiaries, restrictions on making loans and limitations on the ability of those subsidiaries to repay loans to certain related parties (including GATX) and to distribute capital to GATX. The covenants relating to loans and capital distributions effectively limit the ability of GRE to transfer funds to GATX. At December 31, 2012, the maximum amount that GRE could transfer to GATX without violating its covenants was $81.4 million, implying that $389.7 million of subsidiary net assets were restricted. At December 31, 2012, GRE was in compliance with all covenants and conditions of these loan agreements.

Another subsidiary’s financing, guaranteed by GATX, contains various restrictive covenants, including requirements for GATX to maintain a defined net worth and a fixed charge coverage ratio. This fixed charge coverage ratio covenant is less restrictive than that contained in the revolving credit facility.

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GATX does not anticipate any covenant violations nor does it anticipate that any of these covenants will restrict its operations or its ability to procure additional financing.

See Note 8 to the consolidated financial statements for detailed information on GATX’s credit facilities, debt obligations and related restrictive covenants.

Credit Ratings

The availability of GATX’s funding options may be affected by certain factors, including the global capital market environment and outlook as well as GATX’s financial performance. GATX’s access to capital markets at competitive rates is dependent on its credit rating and rating outlook, as determined by rating agencies such as Standard & Poor’s (“S&P”) and Moody’s Investor Service (“Moody’s”). As of December 31, 2012, GATX’s long-term unsecured debt was rated BBB by S&P and Baa2 by Moody’s. GATX’s rating outlook from both agencies was stable. GATX’s short-term unsecured debt was rated A-2 by S&P and P-2 by Moody’s.

Shelf Registration Statement

GATX maintains an effective shelf registration statement on file with the U.S. Securities and Exchange Commission (“SEC”) that enables it to issue public debt securities and pass-through certificates. The registration statement expires in August 2013.

Commercial Commitments

In connection with certain investments or transactions, GATX has entered into various commercial commitments, such as guarantees and standby letters of credit, which could require performance in the event of demands by third parties. Similar to GATX’s balance sheet investments, these guarantees expose GATX to credit, market and equipment risk; accordingly, GATX evaluates its commitments and other contingent obligations using techniques similar to those used to evaluate funded transactions.

GATX’s commercial commitments at December 31, 2012 were (in millions):

	Amount of Commitment Expiration by Period
	Total		2013		2014		2015		2016		2017		Thereafter
Affiliate guarantees	$	42.0	$	30.0	$	—	$	—	$	—	$	—	$	12.0
Asset residual value guarantees	11.2		5.7		5.5		—		—		—		—
Lease payment guarantees	41.0		6.1		6.4		6.4		7.1		10.1		4.9
Total guarantees	94.2		41.8		11.9		6.4		7.1		10.1		16.9
Standby letters of credit and bonds	10.3		10.3		—		—		—		—		—
	$	104.5	$	52.1	$	11.9	$	6.4	$	7.1	$	10.1	$	16.9

Affiliate guarantees generally involve guaranteeing repayment of the financing utilized to acquire assets and are in lieu of making direct equity investments in the affiliate. Affiliate guarantees exclude an affiliate guarantee for which no stated maximum potential future payment is provided and for which the likelihood of performance under the guarantee is considered remote. GATX is not aware of any event that would require it to satisfy these guarantees and expects the affiliates to generate sufficient cash flow to satisfy their financing obligations.

Asset residual value guarantees represent GATX’s commitment to third parties that an asset or group of assets will be worth a specified amount at the end of a lease term. GATX earns an initial fee for providing these asset value guarantees, which is amortized into income over the guarantee period. Upon disposition of the assets, GATX receives a share of any proceeds in excess of the amount guaranteed and such residual sharing gains are recorded in net gain on asset dispositions. If, at the end of the lease term, the net realizable value of the asset is less than the guaranteed amount, any liability resulting from GATX’s performance pursuant to these guarantees will be reduced by the value realized from disposition of the asset.

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Lease payment guarantees represent GATX’s guarantee of third-party lease payments to financial institutions. Any liability resulting from GATX’s performance pursuant to these guarantees will be reduced by the value realized from the underlying asset or group of assets.

GATX and its subsidiaries are also parties to standing letters of credit and performance bonds primarily related to workers’ compensation and general liability insurance coverages. No material claims have been made against these obligations and as of December 31, 2012, GATX does not expect any material losses to result from these obligations as performance is not anticipated to be required.

Defined Benefit Plan Contributions

In aggregate in 2012, GATX contributed $5.9 million to its defined benefit pension plans and other post-retirement benefit plans. In 2013, the Company expects to make aggregate contributions of approximately $7 million. As of December 31, 2012, GATX’s funded pension plans were 92% funded. Additional contributions will be dependent on a number of factors including plan asset investment returns and actuarial experience. Subject to the impact of these factors, the Company may make additional material plan contributions. See Note 10 to the consolidated financial statements for additional information on GATX’s benefit plans.

Separately, the shipboard personnel at ASC participate in various multiemployer benefit plans that provide pension, health care, post-retirement and other benefits to active and retired employees.  Amounts contributed and recognized as marine operating expense in 2012 were $8.1 million.  Contributions in 2013 are expected to approximate 2012 amounts but will ultimately depend on the number of vessels deployed and crew hours worked during the year.

GATX Common Stock Repurchases

In 2008, the Company’s Board of Directors authorized a $200 million common stock repurchase program of which $68.6 million was available as of December 31, 2012. In 2013, the Company resumed purchases of stock and as of February 15, approximately 132,000 shares had been repurchased for $6.4 million.

CRITICAL ACCOUNTING POLICIES AND ESTIMATES

The preparation of the consolidated financial statements in conformity with GAAP requires management to use judgment in making estimates and assumptions that affect reported amounts of assets, liabilities, revenues, expenses and related disclosures. The Company regularly evaluates its estimates and judgments based on historical experience, market indicators and other relevant factors and circumstances. Actual results may differ from these estimates under different assumptions or conditions.

The Company considers the following critical accounting policies:

• Operating Assets — Operating assets, including assets acquired under capital lease, are stated at historical cost and are depreciated over their estimated economic useful lives to an estimated residual value using the straight-line method. GATX determines the economic useful life based on its estimate of the period over which the asset will generate revenue. For the majority of GATX’s operating assets, the economic useful life is greater than thirty years. The residual values are based on historical experience and economic factors. GATX periodically reviews the appropriateness of its estimates of useful lives and residual values based on changes in economic circumstances and other factors. Changes in these estimates would result in a change in future depreciation expense.

In addition, GATX reviews long-lived assets, such as operating assets and facilities, for impairment whenever events or circumstances indicate that the carrying amount of these assets may not be recoverable. GATX measures the recoverability of assets to be held and used by comparing the carrying amount of an asset to its estimated future net cash flows. Estimated future cash flows are based on a number of assumptions including: lease rates, lease term (including renewals), freight rates and volume, operating costs, the life of the asset and final disposition proceeds. If GATX determines an asset is impaired, it records an impairment loss equal to the excess of the asset’s carrying amount over its estimated fair value. Fair value is based on discounted future cash flows supplemented with independent appraisals and market comparables when available and appropriate.

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• Lease Classification — GATX analyzes all new and modified leases to determine whether the lease is classified as an operating or capital lease. The lease classification analysis relies on certain assumptions that require significant judgment, such as the asset fair value, the estimated residual value, the interest rate implicit in the lease, and the economic useful life of the asset. While most of GATX’s leases are classified as operating leases, changes in the assumptions used could result in a different lease classification, which would change the manner in which the lease transaction impacts GATX’s financial position and results of operations.

• Impairment of Investments in Affiliated Companies — GATX reviews the carrying amount of its investments in affiliates annually, or whenever events or circumstances indicate that a decline in value may have occurred. If management determines that indicators of impairment are present for an investment, an analysis is performed to estimate the fair value of that investment. Active markets do not exist for the majority of GATX’s affiliate investments and as a result, GATX estimates fair value using discounted cash flow analysis at the investee level, price-earnings ratios based on comparable businesses, or other valuation techniques that are appropriate for the particular circumstances of the affiliate and for which sufficient data are available. For all fair value estimates, GATX uses observable inputs whenever possible and appropriate.

Once an estimate of fair value is made, it is compared to the investment’s carrying value. If the investment’s estimated fair value is less than its carrying value, then the investment is deemed impaired. If an investment is deemed impaired, then GATX determines whether the impairment is other-than-temporary. Factors that management considers in making this second determination include expected operating results for the near future, the length of the economic life cycle of the underlying assets of the investee and the ability of GATX to hold the investment through the end of the underlying assets’ useful life. Anticipated actions that are probable of being taken by investee management that may improve its business prospects are also considered. If GATX reasonably determines an investment to be only temporarily impaired, no impairment loss is recorded. Alternatively, if GATX determines an impairment is other-than-temporary, a loss equal to the difference between the estimated fair value of the investment and its carrying value is recorded in the period of identification.

• Impairment of Goodwill — GATX reviews the carrying amount of its recorded goodwill annually or in interim periods if circumstances indicate an impairment may have occurred. The impairment review is performed at the reporting unit level, which is one level below an operating segment. The goodwill impairment test is a two-step process and requires management to make certain judgments in determining applicable assumptions used in the calculation. The first step consists of estimating the fair value of each reporting unit, which GATX determines based on a discounted cash flow model. The future cash flows are estimated based on revenue and expense forecasts and includes assumptions for future growth. In estimating the fair value of the reporting unit, GATX also considers observable multiples of book value and earnings for companies that management believes are comparable to the applicable reporting units. GATX then compares its estimate of the fair value of the reporting unit with the reporting unit’s carrying amount, which includes goodwill. If the estimated fair value is less than the carrying amount, an additional step is performed that compares the implied fair value of the reporting unit’s goodwill with the carrying amount of the goodwill. The determination of a reporting unit’s implied fair value of the goodwill requires GATX to allocate the estimated fair value of the reporting unit to the assets and liabilities of the reporting unit. Any unallocated fair value represents the implied fair value of the goodwill. To the extent that the carrying amount of the goodwill exceeds its implied fair value, an impairment loss is recorded.

• Pension and Post-Retirement Benefits Assumptions — GATX uses actuarial assumptions to calculate pension and other post-retirement benefit obligations and related costs. Two critical assumptions, the discount rate and the expected return on plan assets, are important elements of plan expense and liability measurement. Other assumptions involve demographic factors such as expected retirement age, mortality, employee turnover, health care cost trends and rate of compensation increases.

GATX uses the discount rate to calculate the present value of expected future pension and post-retirement cash flows as of the measurement date. The discount rate is based on yields for high-quality, long-term bonds, with durations similar to that of the projected benefit obligation. The expected long-term rate of return on plan assets is based on current and expected asset allocations, as well as historical and expected returns on various categories of plan assets. GATX evaluates these critical assumptions annually and makes adjustments as required in accordance with changes in underlying market conditions, valuation of plan assets, or demographics. Changes in these assumptions may increase or decrease periodic benefit plan expense as well as the carrying value of benefit plan assets or obligations. See Note 10 to the consolidated financial statements for additional information regarding these assumptions.

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• Share-Based Compensation — GATX provides equity awards to certain employees and non-employee directors in the form of stock appreciation rights (“SARs”), restricted stock, performance share awards and phantom stock awards. Compensation expense for these awards is recognized on a pro-rata basis over the applicable vesting period based on the award’s grant date fair value. GATX uses the Black-Scholes options valuation model to calculate the grant date fair value of SARs. This model requires GATX to make certain assumptions, some of which are highly subjective, which will affect the amount of compensation expense to be recorded. Assumptions used in the model include expected stock price volatility (based on the historical volatility of GATX’s stock price), the risk-free interest rate (based on the treasury yield curve), the expected life of the equity award (based on historical exercise patterns and post-vesting termination behavior) and the expected dividend equivalents to be paid during the estimated life of the equity award (since GATX’s SARs are dividend participating). The fair value of other equity awards is based on GATX’s stock price on the grant date. See Note 11 to the consolidated financial statements for additional information on share-based compensation.

• Income Taxes — GATX’s operations are subject to taxes in the U.S., various states and foreign countries and as result, may be subject to audit in all of these jurisdictions. Tax audits may involve complex issues and disagreements with taxing authorities that could require several years to resolve. GAAP requires that GATX presume that uncertain income tax positions will be examined by the relevant tax authority and determine whether it is more likely than not that the income tax position will be sustained upon examination, including resolution of any related appeals or litigation processes, based on the technical merits of the position. An income tax position that meets the more likely than not recognition threshold is then evaluated to determine the probable amount of benefit to be recognized in the financial statements. Establishing accruals for uncertain tax benefits requires management to make estimates and assessments with respect to the ultimate outcome of tax audit issues and amounts recorded in the financial statements. The ultimate resolution of uncertain tax benefits may differ from management’s estimate, potentially impacting the Company’s financial position, results of operations or cash flows.

GATX evaluates the need for a deferred tax asset valuation allowance by assessing the likelihood of whether deferred tax assets, including net operating loss and tax credit carryforward benefits, will be realized in the future. The assessment of whether a valuation allowance is required involves judgment, including the forecast of future taxable income and the evaluation of tax planning initiatives, if applicable.

Taxes have not been provided on undistributed earnings of foreign subsidiaries as GATX intends to permanently reinvest such earnings in those foreign operations. If, in the future, these earnings are repatriated to the U.S., or if the Company expects such earnings to be repatriated, a provision for additional taxes may be required.

See Note 12 to the consolidated financial statements for additional information on income taxes.

NEW ACCOUNTING PRONOUNCEMENTS

See Note 3 to the consolidated financial statements for a summary of new accounting pronouncements that may impact GATX’s business.

NON-GAAP FINANCIAL MEASURES

This report includes certain financial performance measures computed using non-GAAP components as defined by the SEC. GATX has provided a reconciliation of those non-GAAP components to the most directly comparable GAAP components. Financial measures disclosed in this report are meant to provide additional information and insight into the historical operating results and financial position of the Company. Management uses these measures in analyzing GATX’s financial performance from period to period and in making compensation decisions. These measures are not in accordance with, or a substitute for, GAAP and may be different from, or inconsistent with, non-GAAP financial measures used by other companies.

GATX presents the financial measures of net income, diluted earnings per share and return on equity, which exclude the effect of Tax Adjustments and Other Items. Management believes that excluding these items facilitates a more meaningful comparison of financial performance between years and provides transparency into the operating results of GATX’s businesses. In addition, GATX discloses total on and off balance sheet assets because a significant portion of GATX’s rail fleet has been financed through sale-leasebacks that are accounted for as operating leases and the assets are not recorded on the balance sheet. Management believes this information provides investors with a better representation of the assets deployed in GATX’s businesses.

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GLOSSARY OF KEY TERMS

• Non-GAAP Financial Measures — Numerical or percentage based measures of a company’s historical performance, financial position or liquidity calculated using a component different from that presented in the financial statements as prepared in accordance with GAAP.

• Net Income Excluding Tax Adjustments and Other Items — Earnings in 2010, 2011 and 2012 included certain items that GATX believes are not necessarily related to its ongoing business activities.

• Off Balance Sheet Assets — Assets, primarily railcars, which are financed with operating leases and therefore not recorded on the balance sheet. GATX estimates the off balance sheet asset amount by calculating the present value of committed future operating lease payments using the interest rate implicit in each lease.

• On Balance Sheet Assets — Total assets as reported on the balance sheet.

• Total On and Off Balance Sheet Assets — The total of on balance sheet assets and off balance sheet assets.

• Return on Equity — Net income divided by average shareholders’ equity.

• Return on Equity Excluding Tax Adjustments and Other Items — Net income excluding tax adjustments and other items divided by average shareholders’ equity.

Reconciliation of non-GAAP components used in the computation of certain Financial Measures

The following table presents Total On and Off Balance Sheet Assets (in millions):

	2012		2011		2010		2009
Consolidated On Balance Sheet Assets	$	6,055.4	$	5,857.5	$	5,442.4	$	5,206.4
Off Balance Sheet Assets:
Rail North America	863.5		884.5		968.1		1,012.1
ASC	21.0		—		—		—
Portfolio Management	—		2.6		3.4		4.0
Total On and Off Balance Sheet Assets	$	6,939.9	$	6,744.6	$	6,413.9	$	6,222.5
Shareholders’ Equity	$	1,244.2	$	1,127.3	$	1,113.7	$	1,102.6

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The following table presents Net Income, excluding Tax Adjustments and Other Items for the years ended (in millions, except per share data):

	2012			2011			2010
Net Income, as reported	$	137.3		$	110.8		$	80.8
Tax adjustments (a)	(24.0		)	(8.9		)	(11.4		)
Losses (gains) on AAE Interest rate swaps (net of tax) (b)	20.5			(0.2		)	9.3
Litigation recoveries (no tax effect in 2011, net of tax in 2010) (c)	—			(3.2		)	(4.1		)
Leveraged lease adjustment (net of tax) (d)	—			(3.5		)	—
Net Income, excluding Tax Adjustments and Other Items	$	133.8		$	95.0		$	74.6
Diluted Earnings Per Share, as reported	$	2.88		$	2.35		$	1.72
Tax adjustments (a)	(0.50		)	(0.19		)	(0.24		)
Losses (gains) on AAE Interest rate swaps (net of tax) (b)	0.43			—			0.20
Litigation recoveries (no tax effect in 2011, net of tax in 2010) (c)	—			(0.07		)	(0.09		)
Leveraged lease adjustment (net of tax) (d)	—			(0.08		)	—
Diluted Earnings Per Share, excluding Tax Adjustments and Other Items	$	2.81		$	2.01		$	1.59

________

(a) In 2012, tax adjustments included $0.7 million of deferred expense due to an enacted rate increase in Ontario, Canada, $4.6 million of deferred benefits due to statutory rate decreases in the United Kingdom for certain affiliates, $15.5 million of previously unrecognized tax benefits resulting from the expiration of the applicable statute of limitations and $4.6 million of benefits attributable to the utilization of foreign tax credit carry-forwards. In 2011, tax adjustments included a $4.1 million deferred benefit attributable to a reduction in the statutory tax rates in the United Kingdom for certain affiliates and $4.8 million of benefits primarily attributable to the reversal of accruals resulting from the close of a domestic tax audit. In 2010, tax adjustments included $9.5 million of deferred benefits attributable to the reversal of accruals resulting from the close of certain domestic and foreign tax audits and a $1.9 million deferred benefit attributable to a reduction in the statutory tax rates in the United Kingdom for certain affiliates.

(b) Realized and unrealized losses (gains) on AAE interest rate swaps.

(c) Reserve release related to the favorable resolution of litigation matters.

(d) Gain related to a leveraged lease adjustment.

Item 7A.  Quantitative and Qualitative Disclosures About Market Risk

In the normal course of business, GATX and its subsidiaries are exposed to interest rate and foreign currency exchange rate risks that could impact their financial results. To manage these risks they may enter into certain derivative transactions, principally interest rate swaps, Treasury rate locks, options and currency forwards and swaps. These instruments and other derivatives are entered into only for hedging existing underlying exposures. GATX and its subsidiaries do not hold or issue derivative financial instruments for speculative purposes.

Interest Rate Exposure — GATX’s reported interest expense is affected by changes in interest rates, primarily LIBOR, as a result of the issuance of floating rate debt instruments. GATX generally manages the amount of floating rate debt instruments in relation to its floating rate investments. Based on GATX’s floating rate debt instruments at December 31, 2012, and giving effect to related derivatives, a hypothetical increase in market interest rates of 100 basis points would cause an increase in after-tax interest expense of $8.3 million in 2013. Comparatively, at December 31, 2011, a hypothetical 100 basis point increase in interest rates would have resulted in a $7.1 million increase in after-tax interest expense in 2012. GATX’s earnings are also exposed to interest rate changes through its income from affiliates.  Certain affiliates issue floating rate debt instruments to finance their investments.  Additionally, GATX’s rail affiliate, AAE Cargo AG, holds multiple derivative instruments associated with existing and forecasted floating rate debt issuances.  These instruments are highly sensitive to changes in interest rates and changes in their fair values are recognized currently in income.

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Foreign Currency Exchange Rate Exposure — Certain of GATX’s foreign subsidiaries conduct business in currencies other than the U.S. dollar, principally those operating in Poland, Germany, Austria and Canada. As a result, GATX is exposed to foreign currency risk attributable to changes in the exchange value of the U.S. dollar in terms of the Euro, Polish zloty and Canadian dollar. Based on 2012 local currency earnings and considering non-functional currency assets and liabilities recorded as of December 31, 2012, a uniform and hypothetical 10% strengthening in the U.S. dollar versus applicable foreign currencies would increase after-tax income in 2013 by $0.2 million. Comparatively, based on 2011 local currency earnings and considering non-functional currency assets and liabilities recorded as of December 31, 2011, a uniform and hypothetical 10% strengthening in the U.S. dollar versus applicable foreign currencies would have decreased after-tax income in 2012 by $1.4 million.

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Item 8. Financial Statements and Supplementary Data

Report of Independent Registered Public Accounting Firm

The Board of Directors and Shareholders of GATX Corporation and subsidiaries

We have audited the accompanying consolidated balance sheets of GATX Corporation and subsidiaries as of December 31, 2012 and 2011, and the related consolidated statements of comprehensive income, shareholders' equity and cash flows for each of the three years in the period ended December 31, 2012. Our audits also included the financial statement schedule listed in the index at item 15(a)(2). These financial statements and schedule are the responsibility of the Company's management. Our responsibility is to express an opinion on these financial statements based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in all material respects, the consolidated financial position of GATX Corporation and subsidiaries at December 31, 2012 and 2011, and the consolidated results of their operations and their cash flows for each of the three years in the period ended December 31, 2012, in conformity with U.S. generally accepted accounting principles. Also, in our opinion, the related financial statement schedule, when considered in relation to the basic financial statements as a whole, presents fairly in all material respects the information set forth therein.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), GATX Corporation and subsidiaries' internal control over financial reporting as of December 31, 2012, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 26, 2013, expressed an unqualified opinion thereon

/s/ Ernst & Young LLP

Ernst & Young LLP

Chicago, Illinois

February 26, 2013

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GATX CORPORATION AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(In millions)

	December 31
	2012			2011
Assets
Cash and Cash Equivalents	$	234.2		$	248.4
Restricted Cash	29.7			35.2
Receivables
Rent and other receivables	88.4			76.7
Loans	27.2			30.4
Finance leases	245.7			334.9
Less: allowance for losses	(4.6		)	(11.8		)
	356.7			430.2
Operating Assets and Facilities (includes $123.1 and $123.5 relating to a consolidated VIE at December 31, 2012 and 2011, respectively)	6,855.2			6,416.0
Less: allowance for depreciation (includes $24.7 and $19.2 relating to a consolidated VIE at December 31, 2012 and 2011, respectively)	(2,200.8		)	(2,056.7		)
	4,654.4			4,359.3
Investments in Affiliated Companies	502.0			513.8
Goodwill	91.7			90.5
Other Assets	186.7			180.1
Total Assets	$	6,055.4		$	5,857.5
Liabilities and Shareholders’ Equity
Accounts Payable and Accrued Expenses	$	177.4		$	135.6
Debt
Commercial paper and borrowings under bank credit facilities	273.6			28.6
Recourse	3,152.4			3,354.8
Nonrecourse (includes $35.1 and $45.2 relating to a consolidated VIE at December 31, 2012 and 2011, respectively)	130.6			149.4
Capital lease obligations	11.3			14.3
	3,567.9			3,547.1
Deferred Income Taxes	783.0			765.9
Other Liabilities	282.9			281.6
Total Liabilities	4,811.2			4,730.2
Shareholders’ Equity
Preferred stock ($1.00 par value, 5,000,000 shares authorized, 15,567 and 16,644 shares of Series A and B $2.50 Cumulative Convertible Preferred Stock issued and outstanding, aggregate liquidation preference of $0.9 million and $1.0 million as of December 31, 2012 and 2011, respectively)	*			*
Common stock ($0.625 par value, 120,000,000 shares authorized, 66,021,444 and 65,775,568 shares issued and 46,898,924 and 46,653,048 shares outstanding as of December 31, 2012 and 2011, respectively)	41.2			41.1
Additional paid in capital	658.5			644.4
Retained earnings	1,249.4			1,171.2
Accumulated other comprehensive loss	(144.6		)	(169.1		)
Treasury stock at cost (19,122,520 shares at December 31, 2012 and 2011)	(560.3		)	(560.3		)
Total Shareholders’ Equity	1,244.2			1,127.3
Total Liabilities and Shareholders’ Equity	$	6,055.4		$	5,857.5

__________

* Less than $0.1

The accompanying notes are an integral part of these consolidated financial statements.

56

GATX CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(In millions, except share data)

	Year Ended December 31
	2012			2011			2010
Revenues
Lease revenue	$	917.0		$	900.1		$	860.4
Marine operating revenue	265.5			230.0			198.4
Other revenue	60.7			61.3			55.2
Total Revenues	1,243.2			1,191.4			1,114.0
Expenses
Maintenance expense	269.7			277.6			268.2
Marine operating expense	182.4			165.6			138.0
Depreciation	237.4			226.5			217.0
Operating lease expense	130.2			132.0			140.2
Other operating expense	24.2			27.8			30.9
Selling, general and administrative expense	160.2			155.3			134.8
Total Expenses	1,004.1			984.8			929.1
Other Income (Expense)
Net gain on asset dispositions	79.5			65.8			41.1
Interest expense, net	(166.6		)	(168.9		)	(167.1		)
Other (expense) income	(8.2		)	4.1			0.4
Income before Income Taxes and Share of Affiliates’ Earnings	143.8			107.6			59.3
Income Taxes	(26.1		)	(29.2		)	(7.0		)
Share of Affiliates’ Earnings (net of tax)	19.6			32.4			28.5
Net Income	$	137.3		$	110.8		$	80.8
Other Comprehensive Income, net of taxes
Foreign currency translation adjustments	25.0			(39.6		)	(28.4		)
Unrealized gain (loss) on securities	0.2			(0.2		)	1.3
Unrealized gain (loss) on derivative instruments	11.7			(0.5		)	(3.5		)
Post-retirement benefit plans	(12.4		)	(18.8		)	5.1
Other comprehensive income (loss)	24.5			(59.1		)	(25.5		)
Comprehensive Income	$	161.8		$	51.7		$	55.3
Share Data
Basic earnings per share	$	2.93		$	2.39		$	1.75
Average number of common shares	46.8			46.4			46.1
Diluted earnings per share	$	2.88		$	2.35		$	1.72
Average number of common shares and common share equivalents	47.6			47.2			47.0
Dividends declared per common share	$	1.20		$	1.16		$	1.12

The accompanying notes are an integral part of these consolidated financial statements.

57

GATX CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

(In millions)

	Year Ended December 31
	2012			2011			2010
Operating Activities
Net income	$	137.3		$	110.8		$	80.8
Adjustments to reconcile income to net cash provided by operating activities:
Gains on sales of assets	(61.4		)	(70.1		)	(43.5		)
Depreciation	249.4			238.5			228.1
Asset impairment charges	5.0			6.8			8.3
Deferred income taxes	24.4			22.7			1.4
Share of affiliates’ earnings, net of dividends	15.5			(3.2		)	8.1
Change in income taxes payable	(9.4		)	9.1			(7.3		)
Change in accrued operating lease expense	(11.0		)	(7.6		)	(13.1		)
Employee benefit plans	0.8			(5.3		)	(21.6		)
Other	19.6			5.1			2.5
Net cash provided by operating activities	370.2			306.8			243.7
Investing Activities
Additions to operating assets and facilities	(739.3		)	(466.4		)	(520.2		)
Loans extended	(1.0		)	(31.9		)	—
Investments in affiliates	(29.7		)	(116.2		)	(64.7		)
Other	—			(0.1		)	(0.2		)
Portfolio investments and capital additions	(770.0		)	(614.6		)	(585.1		)
Purchases of leased-in assets	(1.3		)	(61.1		)	(5.3		)
Portfolio proceeds	288.9			154.1			84.3
Proceeds from sales of other assets	28.4			42.2			30.4
Proceeds from sale-leasebacks	104.9			—			79.0
Net decrease (increase) in restricted cash	5.5			21.4			(23.4		)
Other	—			—			2.4
Net cash used in investing activities	(343.6		)	(458.0		)	(417.7		)
Financing Activities
Net proceeds from issuances of debt (original maturities longer than 90 days)	445.2			790.3			573.8
Repayments of debt (original maturities longer than 90 days)	(671.2		)	(312.8		)	(344.2		)
Net increase (decrease) in debt with original maturities of 90 days or less	243.3			(85.0		)	46.8
Payments on capital lease obligations	(3.0		)	(18.5		)	(12.8		)
Dividends	(58.8		)	(56.0		)	(53.5		)
Other	4.6			5.2			0.9
Net cash (used in) provided by financing activities	(39.9		)	323.2			211.0
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(0.9		)	(2.1		)	(0.2		)
Net (decrease) increase in Cash and Cash Equivalents during the period	(14.2		)	169.9			36.8
Cash and Cash Equivalents at beginning of period	248.4			78.5			41.7
Cash and Cash Equivalents at end of period	$	234.2		$	248.4		$	78.5

The accompanying notes are an integral part of these consolidated financial statements.

58

GATX CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS’ EQUITY

(In millions)

	2012		2012			2011		2011			2010		2010
	Shares		Dollars			Shares		Dollars			Shares		Dollars
Preferred Stock
Balance at beginning of period	*		$ *			*		$ *			*		$ *
Conversion of preferred stock into common stock	*		*			*		*			*		*
Balance at end of period	*		*			*		*			*		*
Common Stock
Balance at beginning of period	65.8		41.1			65.5		40.9			65.2		40.6
Issuance of common stock	0.2		0.1			0.3		0.2			0.2		0.2
Convertible debt conversions	—		—			—		—			0.1		0.1
Conversion of preferred stock into common stock	*		*			*		*			*		*
Balance at end of period	66.0		41.2			65.8		41.1			65.5		40.9
Treasury Stock
Balance at beginning and end of period	(19.1	)	(560.3		)	(19.1	)	(560.3		)	(19.1	)	(560.3		)
Additional Paid In Capital
Balance at beginning of period			644.4					626.2					616.8
Convertible debt conversions			—					—					(0.1		)
Share-based compensation effects			11.2					11.8					7.2
Issuance of common stock			2.9					6.4					2.3
Balance at end of period			658.5					644.4					626.2
Retained Earnings
Balance at beginning of period			1,171.2					1,116.9					1,090.0
Net income			137.3					110.8					80.8
Dividends declared			(59.1		)			(56.5		)			(53.9		)
Balance at end of period			1,249.4					1,171.2					1,116.9
Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period			(169.1		)			(110.0		)			(84.5		)
Other comprehensive income (loss)			24.5					(59.1		)			(25.5		)
Balance at end of period			(144.6		)			(169.1		)			(110.0		)
Total Shareholders’ Equity			$	1,244.2				$	1,127.3				$	1,113.7

__________

* Less than $0.1

The accompanying notes are an integral part of these consolidated financial statements.

59

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

NOTE 1. Description of Business

Headquartered in Chicago, Illinois, GATX Corporation (“GATX” or the “Company”) leases, operates, manages and remarkets long-lived, widely-used assets, primarily in the rail and marine markets. GATX also invests in joint ventures that complement existing business activities. In 2012, the Company modified the composition of its reportable segments to reflect an increasing focus on international growth and related changes in its management structure. As a result, the Company now reports financial results through fourprimary business segments: Rail North America, Rail International, American Steamship Company (“ASC”) and Portfolio Management. All segment information is presented on this basis.

NOTE 2. Accounting Changes

Goodwill — In September 2011, the Financial Accounting Standards Board (FASB) issued authoritative accounting guidance that allows an entity to assess qualitative factors to determine if performing the two-step goodwill impairment test is necessary. The assessment of qualitative factors requires an entity to evaluate all events or circumstances that could impact the likelihood that the fair value of a reporting unit is less than its carrying amount. The guidance is effective for periods beginning after December 15, 2011. Application of the new guidance did not impact GATX’s financial position, results of operations or cash flows.

Fair Value Measurement — In May 2011, the FASB issued authoritative accounting guidance that changed some fair value measurement principles, clarified the application of existing guidance, and enhanced fair value disclosure requirements. The guidance requires an entity to disclose transfers between Level 1 and Level 2 fair value measurements and the reasons for those transfers. The guidance is effective for periods beginning after December 15, 2011. Application of the new guidance did not impact GATX’s financial position, results of operations or cash flows.

NOTE 3. Significant Accounting Policies

Basis of Presentation — The accompanying consolidated financial statements were prepared in accordance with United States generally accepted accounting principles (“GAAP”).

Use of Estimates — The preparation of these financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements. The Company regularly evaluates its estimates and judgments based on historical experience and other relevant facts and circumstances. Actual amounts could differ from those estimates.

Correction of Misstatement — During the first quarter of 2010, the Company discovered a clerical error in the preparation of its consolidated balance sheet as of December 31, 2009, and consolidated statement of cash flows for the year ended December 31, 2009. The error resulted in a $13.1 million overstatement in each of cash and cash equivalents; accounts payable and accrued expenses; and net cash provided by operating activities. Management determined that the effect of this error was immaterial and adjusted its consolidated balance sheet and consolidated statement of cash flows in 2010 to correct this error.

Reclassification — Certain amounts reported in the 2011 and 2010 financial statements have been reclassified to conform to the 2012 presentation. In particular, GATX changed the presentation of certain items reported on its Statement of Comprehensive Income. Specifically:

• Asset remarketing income and scrapping gains were removed from revenue and asset impairments were removed from other expense. These amounts have been aggregated and included as a separate line item entitled net gain (loss) on asset dispositions.

• Share of affiliates' earnings was formerly presented as a pre-tax line item and was combined with revenue in the gross income line. These earnings are now presented on a net-of-tax basis after the subtotal "Income before Income Taxes and Share of Affiliates' Earnings".

• Operating revenues relating to Portfolio Management owned vessels are reported as marine operating revenues. Previously they were treated as usage rents and recorded with lease income. The related marine operating expenses, which were previously reported as other expenses, are now reported as marine operating expenses.

60

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Consolidation — The consolidated financial statements of GATX Corporation and Subsidiaries include the assets, liabilities, revenues and expenses of GATX, all majority-owned subsidiaries that the Company controls and variable interest entities (“VIEs”) for which the Company is the primary beneficiary. Intercompany transactions and balances have been eliminated. GATX's consolidated subsidiaries include the following special-purpose corporations engaged in the financing of railcars, General American Railcar Corporation, General American Railcar Corporation II, General American Railcar Corporation III, General American Marks Company and GARC LLC (collectively the "SPCs"). The obligations of the SPCs are nonrecourse to GATX and their assets are available first to satisfy claims of their creditors. 

Variable Interest Entities — GATX evaluates whether an entity is a VIE based on the sufficiency of the entity’s equity and whether the equity holders have the characteristics of a controlling financial interest. To determine if it is the primary beneficiary of a VIE, GATX assesses whether it has the power to direct the activities that most significantly impact the economic performance of the VIE and the obligation to absorb losses or the right to receive benefits that may be significant to the VIE. These determinations are both qualitative and quantitative, and they require management to make judgments and assumptions about the VIE’s forecasted financial performance and the volatility inherent in those forecasted results. GATX evaluates new investments for VIE determination and regularly reviews all existing entities for events that may result in an entity becoming a VIE or GATX becoming the primary beneficiary of an existing VIE. See Note 7 for additional information.

Investments in Affiliated Companies —Investments in joint ventures and other non-controlled entities are accounted for using the equity method when it is determined that GATX has the ability to exercise significant influence over the financial and operating policies of the investee. Under the equity method, initial investments are recorded at cost and then adjusted for GATX’s share of the affiliates’ undistributed earnings and losses, distributions of capital, and loan payments to or from the affiliate. Loans to and from affiliates are reflected as part of GATX’s investment in the affiliate and interest on these loans is included in GATX’s proportional share of the affiliates’ earnings. GATX reviews the carrying amount of its investments in affiliates annually, or whenever events or circumstances indicate that a decline in value may have occurred. If GATX determines an investment is impaired on an other-than-temporary basis, it records a loss equal to the difference between the fair value of the investment and its carrying value. See Note 6 for additional information.

Fair Value Measurements —As defined by GAAP, fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value measurements are classified according to a three-level hierarchy based on management’s judgment about the reliability of the inputs used in the fair value measurement. Level 1 inputs are quoted prices available in active markets for identical assets or liabilities. Level 2 inputs are observable, either directly or indirectly, and include quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3 inputs are unobservable, meaning they are supported by little or no market activity. Fair value measurements classified as Level 3 typically rely on the use of pricing models and discounted cash flow methodologies where significant management judgment is required. See Note 9 for additional information.

Cash and Cash Equivalents — All highly liquid investments with a maturity of three months or less when purchased are classified as cash equivalents.

Restricted Cash — Cash and cash equivalents that are restricted as to withdrawal and use. GATX’s restricted cash primarily relates to contractually required amounts maintained for six wholly-owned bankruptcy-remote, special-purpose corporations.

Loans — GATX records loans at the principal amount outstanding plus accrued interest. The loan portfolio is reviewed regularly and a loan is classified as impaired when it is probable that GATX will be unable to collect all amounts due under the loan agreement. Since most loans are collateralized, impairment is generally measured as the amount by which the carrying value of the loan exceeds expected repayments plus the fair value of the underlying collateral. Generally, interest income is not recognized on impaired loans until the loan has been paid up to contractually current status or as conditions warrant.

61

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Operating Assets and Facilities — Operating assets and facilities are principally stated at cost plus capitalized improvements. Assets acquired under capital leases are included in operating assets, and the related obligations are recorded as liabilities. Operating assets and facilities are depreciated over their estimated useful lives or lease terms to estimated residual values using the straight-line method. Leasehold improvements are depreciated over the shorter of their useful lives or the lease term. The estimated depreciable lives of operating assets and facilities are as follows:

Railcars	30 — 38 years
Locomotives	10 — 20 years
Buildings	40 — 50 years
Leasehold improvements	5 — 15 years
Marine vessels	30 — 65 years
Other equipment	5 — 30 years

GATX reviews long-lived assets, such as operating assets and facilities, for impairment whenever events or circumstances indicate that the carrying amount of such assets may not be recoverable. Recoverability of assets to be held and used is evaluated by comparing the carrying amount of the asset to the undiscounted future net cash flows GATX expects the asset to generate. If GATX determines an asset is impaired, it recognizes an impairment loss equal to the excess of the carrying amount over the asset’s fair value. Assets to be disposed of that meet specified accounting criteria are classified as held for sale and recorded at the lower of their carrying amount or fair value less costs to sell.

Lease Classification — GATX determines the classification of a lease at its inception. If the provisions of the lease subsequently change, other than by renewal or extension, GATX evaluates if that change would have resulted in a different classification had the change been in effect at inception. If so, the revised agreement is considered a new lease for lease classification purposes. See Note 5 for additional information.

Finance Leases — Finance leases include direct finance leases and leveraged leases. Direct finance leases consist of a gross lease payment receivable and an estimated residual value of the leased equipment at the lease termination date, net of unearned income. Lease payment receivables represent the rent GATX will receive over the remainder of the lease term. Initial unearned income is the amount by which the sum of the original lease payment receivable and the estimated residual value exceeds the original cost or carrying value of the underlying equipment. GATX amortizes unearned income to lease income over the lease term in a manner that produces a constant rate of return on the net investment in the lease. Finance leases that are mainly financed at inception with nonrecourse borrowings and that meet certain criteria are accounted for as leveraged leases. Leveraged lease receivables are stated net of related nonrecourse debt. Initial unearned income for leveraged leases is the excess of anticipated cash flows (including estimated residual values and net of the related debt service) over the original investment in the lease. See Note 5 for additional information.

GATX regularly reviews the performance of the finance lease portfolio and classifies finance leases as non-performing if it is probable that GATX will be unable to collect all amounts due under the lease. GATX suspends the accrual of income on non-performing finance leases until all contractual payments are current or as conditions warrant. Payments received on non-performing finance leases are applied to the lease payment receivable.

Residual Values — Residual values are a component of GATX’s investment in finance leases. Residual values are the estimated value of an asset at the end of a finance lease contract. GATX reviews its estimates of residual value annually or whenever events or circumstances indicate that residual values may have declined. Other-than-temporary declines in value are recognized as impairments.

Inventory — GATX’s inventory consists of railcar and locomotive repair components and marine vessel spare parts. All inventory balances are stated at lower of cost or market. Railcar repair components are valued using the average cost method. Vessel spare parts inventory is valued using the first-in, first-out method. Inventory is included in other assets on the balance sheet.

62

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Goodwill — GATX recognizes goodwill when the purchase price of an acquired business exceeds the fair value of the acquired net assets and assigns the goodwill to the same reporting unit as the net assets of the acquired business. GATX’s reporting units are based on the composition of its operating segments, taking into consideration whether the operating segments consist of multiple businesses and, if so, whether the businesses operate in different economic environments. Goodwill is tested annually for impairment by comparing the fair value of the reporting unit with its carrying amount, including goodwill. If the fair value of the reporting unit exceeds its carrying amount, then the goodwill of the reporting unit is not considered impaired. If the carrying amount of the reporting unit exceeds its fair value, GATX compares the implied fair value of the reporting unit’s goodwill (the reporting unit fair value less its carrying amount, excluding goodwill) with the carrying amount of the goodwill. An impairment loss is recorded in the amount that the carrying amount of goodwill exceeds its implied fair value. Reporting unit fair values are primarily estimated using discounted cash flow models. GATX performs its impairment test annually, in the fourth quarter, or in interim periods if events or circumstances indicate a potential impairment. See Note 16 for additional information.

Allowance for Losses — The allowance for losses is an estimate of credit losses existing in reservable assets. Reservable assets are divided into two categories: rent and other receivables, which includes short-term trade billings, and loans and finance lease receivables. GATX bases loss reserves for rent and other receivables on historical loss experience and judgments about the impact of economic conditions, the state of the markets GATX operates in and collateral values. In addition, GATX may establish specific reserves for known troubled accounts. Reserve estimates for loans and finance lease receivables are generally evaluated on a customer-specific basis, considering the same factors as rent and other receivables as well as a regular assessment of each customer’s specific credit situation. Amounts are charged against the allowance when they are deemed to be uncollectable. There were no material changes in estimation methods or assumptions for the allowance during 2012. GATX believes that the allowance is adequate to cover losses inherent in its reservable assets as of December 31, 2012. Since the allowance is based on judgments and estimates, it is possible that actual losses incurred will differ from the estimate. See Note 17 for additional information.

Income Taxes — Provisions for federal, state and foreign income taxes are calculated on reported income before income taxes. Calculations of deferred tax assets and liabilities are based on the differences between the financial statement and tax bases of assets and liabilities, using enacted rates in effect for the year the differences are expected to reverse. The cumulative effect of any changes in tax rates from those previously used in determining deferred tax assets and liabilities is reflected in the provision for income taxes in the period of change. Provisions for income taxes in any given period differ from those currently payable or receivable because certain items of income and expense are recognized in different periods for financial reporting purposes than for income tax purposes. Uncertain tax positions are items deducted for tax purposes, but for which a tax benefit has not been recognized in the financial statements due to the uncertainty of the tax position. GATX’s liability for uncertain tax positions is included in other liabilities on the balance sheet. See Note 12 for additional information.

Derivatives — GATX recognizes all derivative instruments at fair value and classifies them on the balance sheet as either other assets or other liabilities. Classification of derivative activity in the statements of comprehensive income and cash flows is generally determined by the nature of the hedged item. Gains and losses on derivatives that are not accounted for as hedges are classified as other expenses and the related cash flows are included in cash flows from operating activities.

Derivatives that meet specific accounting criteria are formally designated as qualifying hedges at inception. These criteria require that the derivative is expected to be highly effective at offsetting changes in the fair value or expected cash flows of the hedged exposure both at the inception of the hedging relationship and on an ongoing basis. GATX primarily uses derivatives, such as interest rate swap agreements, Treasury rate locks, options and currency forwards, to hedge its exposure to interest rate and foreign currency exchange rate risk on existing and anticipated transactions. For derivatives designated as fair value hedges, changes in the fair value of both the derivative and the hedged item are recognized in earnings. For derivatives designated as cash flow hedges, the effective portion of the change in the fair value of the derivative is recorded as part of other comprehensive income (loss) and recognized in earnings in the period the hedged transaction affects earnings. Any ineffective portion of the change in the fair value of the derivative is immediately recognized in earnings. Although GATX does not hold or issue derivative financial instruments for purposes other than hedging, certain derivatives are not designated as accounting hedges. Changes in the fair value of these derivatives are recognized in earnings immediately. See Note 9 for additional information.

Defined Benefit Pension and Other Post-Retirement Plans —GATX’s balance sheet reflects the funded status of its pension and post-retirement plans. The funded status of the plans is measured as the difference between the fair value of the plan assets and the projected benefit obligation. GATX recognizes the aggregate overfunding of any plans in other assets, the aggregate underfunding of any plans in other liabilities and the corresponding adjustments to other comprehensive income (loss), net of related taxes.

63

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Foreign Currency — The assets and liabilities of GATX’s operations having non-U.S. dollar functional currencies are translated at exchange rates in effect at year end. Income, expenses and cash flows are translated monthly, using average exchange rates. Gains and losses resulting from the translation of foreign currency financial statements are deferred and recorded as a separate component of other comprehensive income (loss). Gains (losses) resulting from foreign currency transactions and from the remeasurement of non-functional currency denominated assets and liabilities, which are recorded net of related hedges in other expense during the periods in which they occur, were $0.5 million, $(1.6) million and $(1.7) million for 2012, 2011 and 2010, respectively.

Environmental Liabilities — GATX records reserves for environmental remediation costs at sites relating to past and/or discontinued operations when they are probable and a reasonable estimate of the expected costs can be made. Adjustments to initial estimates are recorded when necessary. Since reserves are based on estimates, actual environmental remediation costs may differ. Environmental remediation costs that relate to current or future operations are expensed or capitalized as appropriate. See Note 22 for additional information.

Lease Revenue — Lease revenue includes revenue from full-service and net operating leases, and direct finance leases. Full-service leases are priced as an integrated service that includes amounts related to executory costs (e.g., maintenance, insurance and ad valorem taxes). GATX does not offer stand-alone maintenance service contracts and is unable to separate executory costs from full service lease income based on observable data. Operating lease revenue, including amounts related to executory costs, is recognized on a straight-line basis over the term of the underlying lease. As a result, lease revenue may not be recognized in the same period as maintenance and other executory costs, which are expensed as incurred. Finance lease income is recognized using the interest method, which produces a constant yield over the term of the lease. See Note 5 for additional information.

Marine Operating Revenue —Marine operating revenue is recognized as shipping services are performed and revenue is allocated among reporting periods based on the relative transit time in each reporting period for shipments in process at any month end.

Other Revenue — Other revenue includes customer liability repair revenue, fee income, interest on loans and other miscellaneous revenues. These revenues are recognized when earned, which, in the case of management fees received from affiliates, is when services are performed.

Interest Expense, net — Interest expense is the interest accrued on indebtedness and amortization of debt issuance costs and debt discounts. Debt issuance costs and discounts are deferred and amortized over the applicable term of the related debt. Interest expense is reported net of interest income on bank deposits, which was $1.9 million, $0.7 million and $0.2 million for 2012, 2011 and 2010, respectively.

Operating Lease Expense — GATX leases certain railcars and other assets and facilities closely associated with its revenue generating operations, such as maintenance facilities and equipment. These leases are classified as operating leases and the associated lease expense is recorded on a straight-line basis. Gains and financing costs associated with sale-leasebacks are deferred and amortized as a component of operating lease expense over the related leaseback term. GATX’s leases of office facilities and related administrative assets are also classified as operating leases and the associated expense is recorded in selling, general, and administrative expense (“SG&A”). Total operating lease expense, which includes amounts recorded in SG&A, was $133.3 million, $137.3 million and $145.4 million, in 2012, 2011 and 2010, respectively. See Note 5 for additional information.

Lease and Loan Origination Costs — Initial direct costs of direct finance leases are deferred and amortized over the lease term as an adjustment to lease income. Loan origination fees and related direct loan origination costs for a given loan are offset, and the net amount is deferred and amortized over the term of the loan as an adjustment to interest income.

Maintenance and Repair Costs — Maintenance and repair costs are expensed as incurred. Costs incurred in connection with planned major maintenance activities that improve or extend the useful life of an asset are capitalized and depreciated over their estimated useful life. Required regulatory survey costs for vessels are capitalized and amortized over the applicable survey period, which is generally five years.

ASC Expense Seasonality — ASC's sailing season runs from April 1 - December 31 of each year.  Certain indirect expenses incurred prior to the beginning of the sailing season, including winter maintenance, insurance, operating lease expense and depreciation, are deferred and amortized ratably over the sailing season.  Otherwise, expenses are recognized as incurred.

64

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Share-Based Compensation — GATX measures share-based compensation expense based on the grant date fair value of an award and recognizes the expense net of estimated forfeitures over the requisite service period of each award. Forfeiture rates are estimated at the grant date based on historical experience and adjusted in subsequent periods for differences in actual forfeitures from those estimates. See Note 11 for additional information.

Net Gain on Asset Dispositions — Net gain on asset dispositions consists of disposition gains on sales of operating assets and residual sharing income ("asset remarketing income"), non-remarketing disposition gains, and asset impairments. Disposition gains, including non-remarketing gains, are recognized upon completion of the sale or scrapping of operating assets. Residual sharing income includes fees received from sale of managed assets and assets subject to residual value guarantees, and are recognized upon completion of the underlying transactions.

The following table presents the net gain on asset dispositions for the year ended (in millions) :

	2012			2011			2010
Disposition gains	$	42.7		$	40.4		$	23.8
Residual sharing income	22.6			5.2			7.6
Non-remarketing disposition gains	19.2			27.0			18.0
Asset impairments	(5.0		)	(6.8		)	(8.3		)
Net Gain on Asset Dispositions	$	79.5		$	65.8		$	41.1

Other Income (Expense) —Other income and expense includes fair value adjustments, gains and/or losses on foreign currency transactions and remeasurements, legal defense costs and litigation settlements, along with other miscellaneous income and expense items.

New Accounting Pronouncements

Accumulated Other Comprehensive Income - In January 2013, the FASB issued authoritative accounting guidance that requires presentation and disclosure of the effects on components of net income of significant amounts reclassified out of accumulated other comprehensive income. The guidance becomes effective for periods beginning after December 31, 2012, with early adoption permitted. Application of the new guidance will not impact GATX's financial position, results of operations or cash flows.

NOTE 4. Supplemental Cash Flow and Noncash Investing Transaction

	2012		2011			2010
Supplemental Cash Flow Information (in millions)
Interest paid *	$	162.3	$	152.7		$	152.6
Income taxes paid (refunded), net	11.1		(2.8		)	13.0

________

(*) Interest paid consisted of interest on debt obligations, interest rate swaps (net of interest received) and capital lease interest. Interest expense capitalized as part of the cost of construction of major assets was immaterial for all periods presented.

Noncash Investing Transaction (in millions)	2011
Operating assets received *	$	88.8

________

(*) In connection with the dissolutions of GATX's Clipper Fourth Limited and Clipper Fourth APS affiliates, GATX received liquidating distributions of six vessels with an aggregate fair value of $88.8 million. See Note 6 for additional information.

65

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

NOTE 5. Leases

The following information pertains to GATX as a lessor:

The components of GATX’s finance leases as of December 31 were (in millions):

	Leveraged Leases					Direct Financing						Total Finance Leases
	2012		2011			2012			2011			2012			2011
Total contractual lease payments receivable	$	—	$	617.0		$	327.3		$	341.4		$	327.3		$	958.4
Principal and interest on third-party nonrecourse debt			(518.6		)	—			—			—			(518.6		)
Net contractual future lease receivable	—		98.4			327.3			341.4			327.3			439.8
Estimated non-guaranteed residual value of leased assets	—		20.9			86.9			93.7			86.9			114.6
Unearned income	—		(31.8		)	(168.5		)	(187.7		)	(168.5		)	(219.5		)
Finance leases	—		87.5			245.7			247.4			245.7			334.9
Allowance for losses	—		(9.0		)	—			—			—			(9.0		)
Deferred taxes	—		(62.7		)	—			—			—			(62.7		)
Net investment in finance leases	$	—	$	15.8		$	245.7		$	247.4		$	245.7		$	263.2

Leveraged Lease Income — Income from leveraged leases (net of taxes) was $0.2 million, $4.6 million and $1.5 million in 2012, 2011 and 2010, respectively.

Usage Rents —Rental income on certain operating leases is based on equipment usage. Rental income from usage rents was $18.2 million, $13.7 million and $11.8 million, in 2012, 2011 and 2010, respectively.

Initial Direct Costs — Deferred initial direct costs related to direct financing leases were $0.8 million and $0.9 million, at December 31, 2012 and 2011, respectively.

Future Receipts — Future contractual receipts from finance leases and noncancelable operating leases as of December 31, 2012, were (in millions):

	Finance Leases		Operating Leases *		Total
2013	$	40.2	$	784.4	$	824.6
2014	38.7		594.2		632.9
2015	35.9		465.8		501.7
2016	31.3		346.1		377.4
2017	29.4		223.0		252.4
Years thereafter	151.8		461.7		613.5
	$	327.3	$	2,875.2	$	3,202.5

__________

(*) The future contractual receipts due under operating leases include executory costs in the case of GATX's full service leases.

66

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

The following information pertains to GATX as a lessee:

Capital Lease Assets — Assets that are financed with capital lease obligations as of December 31 were (in millions):

	2012			2011
Railcars	$	—		$	3.6
Marine vessels	79.9			79.0
	79.9			82.6
Less: allowance for depreciation	(67.9		)	(67.7		)
	$	12.0		$	14.9

Lease Obligations — Certain leases provide options for GATX to renew the leases or purchase the assets at the end of the lease term. The specific terms of the renewal and purchase options vary. These amounts are not included with future contractual rental payments. Future contractual rental payments due under noncancelable leases as of December 31, 2012, were (in millions):

	Capital Leases			Recourse Operating Leases (a)		Nonrecourse Operating Leases (b)
2013	$	3.1		$	115.3	$	27.9
2014	3.1			119.7		27.4
2015	3.1			139.7		26.0
2016	2.7			101.5		21.9
2017	1.1			89.3		22.5
Years thereafter	—			417.4		75.3
	$	13.1		$	982.9	$	201.0
Less: amounts representing interest	(1.8		)
Present value of future contractual capital lease payments	$	11.3

__________

(a) The contractual rental payments do not include the costs of licenses, taxes, insurance, and maintenance, for which GATX is required to pay.

(b) The amounts shown for nonrecourse operating leases primarily reflect the rental payments of two wholly-owned bankruptcy-remote, SPCs. These rentals are consolidated for accounting purposes, but do not represent legal obligations of GATX.

NOTE 6. Investments in Affiliated Companies

Investments in affiliated companies represent investments in and loans to domestic and foreign affiliates that are in businesses similar to those of GATX, primarily companies offering lease financing and related services for customers operating rail and marine assets, as well as companies that lease aircraft engines. As of December 31, 2012 and 2011, loan amounts included were $51.3 million and $57.7 million, respectively.

In 2012, GATX's gas compression equipment leasing affiliate, Enerven Compression, LLC ("Enerven"), sold substantially all of its assets and is in the process of liquidation. In connection with the disposition, GATX recognized an impairment loss of $14.8 million, which is reflected in share of affiliates' earnings. In 2011, the Clipper Fourth Limited and Clipper Fourth APS marine affiliates, in each of which GATX held a 45% interest, were dissolved. In connection with the dissolutions, GATX contributed $62.1 million, representing its share of the Clipper affiliates' outstanding debt, received liquidating distributions of six vessels with an aggregate fair value of $88.8 million and recognized an impairment loss of $5.2 million, which is reflected in share of affiliates’ earnings.

67

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

The following table presents GATX's most significant investments in affiliated companies and related percentage of ownership, by segment, as of December 31, 2012 (in millions):

	Segment	GATX’s Investment		GATX’s Percentage Ownership
Rolls-Royce & Partners Finance *	Portfolio Management	$	208.7	50.0	%
AAE Cargo AG	Rail International	74.7		37.5	%
Cardinal Marine Investments, LLC	Portfolio Management	52.6		50.0	%
Singco Gas Pte, Limited	Portfolio Management	40.5		50.0	%
Enerven Compression, LLC	Portfolio Management	32.9		45.6	%
Adler Funding, LLC	Rail North America	26.7		12.5	%
Southern Capital Corporation	Rail North America	20.2		50.0	%
Intermodal Investment Fund V	Portfolio Management	18.1		50.0	%
Somargas II Private Limited	Portfolio Management	15.4		35.0	%
Other affiliates		12.2		various
Investments in Affiliated Companies		$	502.0

__________

(*) Combined investment balances of fourteen separate joint ventures (collectively, the "RRPF Affiliates")

The following table shows GATX’s share of affiliates’ earnings by segment for the years ending December 31 (in millions):

	2012			2011			2010
Rail North America	$	6.5		$	3.9		$	7.2
Rail International	(18.3		)	0.5			(6.0		)
Portfolio Management	33.4			36.2			36.9
Share of affiliates' earnings (pre-tax)	21.6			40.6			38.1
Income taxes	(2.0		)	(8.2		)	(9.6		)
Share of Affiliates' Earnings	$	19.6		$	32.4		$	28.5

The following table summarizes GATX's cash investments in and distributions from affiliates for the years ended December 31 (in millions):

	Cash Investments						Cash Distributions
	2012		2011		2010		2012		2011		2010
Rail North America	$	—	$	—	$	36.8	$	14.9	$	8.0	$	9.7
Rail International	—		2.8		—		—		—		—
Portfolio Management	29.7		113.4		27.9		50.8		27.3		45.0
	$	29.7	$	116.2	$	64.7	$	65.7	$	35.3	$	54.7

The following guarantees, as described in Note 14, related to GATX's affiliated companies were outstanding as of December 31 (in millions). The amount shown below excludes an affiliate guarantee for which no stated maximum potential future payment is provided and for which the likelihood of performance under the guarantee is considered remote.

	2012		2011
Loan payment guarantees	$	42.0	$	42.0

68

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Summarized Financial Data of Affiliates

Aggregated operating results for all of GATX's affiliated companies for the years ending December 31 were (in millions):

	2012		2011		2010
Revenues	$	651.8	$	645.5	$	636.2
Gains on sales of assets	57.4		21.1		10.9
Net income	75.3		88.5		55.8

Aggregated summarized balance sheet data for all of GATX's affiliated companies as of December 31 were (in millions):

	2012		2011
Current assets	$	311.0	$	404.4
Noncurrent assets	4,781.3		4,724.4
Total assets	$	5,092.3	$	5,128.8
Current liabilities	$	439.7	$	570.7
Noncurrent liabilities	3,739.6		3,671.9
Shareholders’ equity	913.0		886.2
Total liabilities and shareholders' equity	$	5,092.3	$	5,128.8

Summarized Financial Data for the RRPF Affiliates

As noted above, GATX's affiliate investments include a 50% interest in each of the RRPF Affiliates, a collection of fourteen domestic and foreign joint ventures with Rolls-Royce plc (or affiliates thereof, collectively “Rolls-Royce”), a leading manufacturer of commercial aircraft jet engines. The RRPF Affiliates are primarily engaged in two business activities: lease financing of aircraft engines to a diverse group of commercial aircraft operators worldwide and sale-leaseback financing of aircraft engines to Rolls-Royce for use in their engine maintenance programs. These aircraft engines are generally depreciated over a useful life of 25 years to an estimated residual value. Lease terms vary but typically range from 7 to 10 years. Rolls-Royce acts as manager for each of the RRPF Affiliates and also performs substantially all required maintenance activities. GATX's share of affiliates' earnings (after-tax) from the RRPF Affiliates was $36.7 million, $30.8 million and $25.4 million in 2012, 2011 and 2010, respectively.

The following financial information was derived from the combined financial statements of the RRPF Affiliates.

Condensed income statements for the years ending December 31 (in millions):

	2012			2011			2010
Lease revenue from third parties	$	140.4		$	127.9		$	118.2
Lease revenue from Rolls-Royce	112.9			96.3			94.8
Depreciation expense	(115.1		)	(100.1		)	(89.1		)
Interest expense	(64.8		)	(55.5		)	(54.5		)
Other expenses	(16.3		)	(11.5		)	(9.1		)
Gains on sales of assets	35.9			19.4			3.4
Income before income taxes	93.0			76.5			63.7
Income taxes *	(3.8		)	(3.6		)	(11.6		)
Net income	$	89.2		$	72.9		$	52.1

_________

(*) Represents income taxes directly attributable to the RRPF Affiliates.  Several of the RRPF Affiliates are flow through entities and income taxes are incurred at the shareholder level.

69

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Condensed balance sheets as of December 31 (in millions):

	2012		2011
Current assets	$	84.8	$	104.5
Operating assets, net of accumulated depreciation of $651.8 for 2012 and $568.1 for 2011 *	2,572.2		2,335.5
Other noncurrent assets	14.1		15.0
Total assets	$	2,671.1	$	2,455.0
Current liabilities	$	122.8	$	141.6
Long-term debt	1,955.1		1,796.6
Other liabilities	217.7		201.1
Shareholders’ equity	375.5		315.7
Total liabilities and shareholders' equity	$	2,671.1	$	2,455.0

_________

(*) All operating assets were pledged as collateral for long term debt obligations.

Contractual future lease receipts from noncancelable leases as of December 31, 2012 were as follows (in millions):

	Rolls-Royce		Third Parties		Total
2013	$	120.9	$	133.1	$	254.0
2014	118.9		114.6		233.5
2015	119.7		99.7		219.4
2016	111.3		88.6		199.9
2017	89.4		80.0		169.4
Years thereafter	275.0		182.1		457.1
	$	835.2	$	698.1	$	1,533.3

Maturities of debt obligations as of December 31, 2012, were as follows (in millions):

	Debt Principal
2013	$	64.2
2014	417.1
2015	622.0
2016	359.7
2017	245.6
Years thereafter	288.3
Total debt principal *	$	1,996.9

_________

(*) All debt obligations are nonrecourse to the shareholders.

NOTE 7. Variable Interest Entities

GATX evaluates whether an entity is a variable interest entity (“VIE”) based on the sufficiency of the entity's equity and whether the equity holders have the characteristics of a controlling financial interest.  To determine if it is the primary beneficiary of a VIE, GATX assesses whether it has the power to direct the activities that most significantly impact the economic performance of the VIE and the obligation to absorb losses or the right to receive benefits that may be significant to the VIE. These determinations are both qualitative and quantitative in nature and require certain judgments and assumptions about the VIE's forecasted financial performance and the volatility inherent in those forecasted results. GATX evaluates new investments for VIE determination and regularly reviews all existing entities for any events that may result in an entity becoming a VIE or GATX becoming the primary beneficiary of an existing VIE.

70

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

GATX is the primary beneficiary of a consolidated VIE related to a structured lease financing of a portfolio of railcars because it has the power to direct the significant activities of the VIE through its ownership of the equity interests in the transaction. The risks associated with this VIE are substantially similar to those of GATX's wholly-owned railcar leasing activities.

The carrying amounts of assets and liabilities of the VIE as of December 31 were (in millions):

	2012		2011
Operating assets, net of accumulated depreciation *	$	98.4	$	104.3
Nonrecourse debt	35.1		45.2

_________

(*) All operating assets are pledged as collateral on the nonrecourse debt.

GATX is also involved with other entities determined to be VIEs of which GATX is not the primary beneficiary. These VIEs are primarily leveraged leases and certain investments in railcar and equipment leasing affiliates that have been financed through a mix of equity investments and third-party lending arrangements. GATX determined that it is not the primary beneficiary of these VIEs because it does not have the power to direct the activities that most significantly impact the entities’ economic performance. For certain investments in affiliates determined to be VIEs, GATX concluded that power was shared between the affiliate partners based on the terms of the relevant joint venture agreements, which require approval of all partners for significant decisions involving the VIE.

The carrying amounts and maximum exposure to loss with respect to VIEs that GATX does not consolidate as of December 31 were (in millions):

	2012				2011
	Net Carrying Amount		Maximum Exposure to Loss		Net Carrying Amount		Maximum Exposure to Loss
Investments in affiliates	$	110.7	$	110.7	$	72.2	$	72.2
Leveraged leases	—		—		78.5		78.5
Other investment	0.7		0.7		0.9		0.9
Total	$	111.4	$	111.4	$	151.6	$	151.6

NOTE 8. Debt

Commercial Paper and Borrowings Under Bank Credit Facilities ($ in millions)

	December 31
	2012			2011
Balance	$	273.6		$	28.6
Weighted average interest rate	0.72		%	1.26		%

Credit Lines and Facilities

GATX has a $560 million unsecured revolving credit facility in the U.S. that matures in May 2015. At December 31, 2012, availability under this facility was $365.3 million, with $185.0 million of commercial paper outstanding and $9.7 million of letters of credit issued, both backed by the facility. Annual commitment fees for the revolving credit facility are based on a percentage of the commitment and were $1.2 million, $0.9 million and $0.4 million for 2012, 2011 and 2010, respectively. GATX also has unsecured lines of credit in Europe totaling $112.1 million. At December 31, 2012, availability under these lines of credit was $23.5 million.

71

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Recourse and Nonrecourse Debt Obligations

Outstanding balances of GATX’s debt obligations and the applicable interest rates as of December 31 ($ in millions):

	Date of Issue	Final Maturity	Interest Rate		2012		2011
Recourse Fixed Rate Debt
Unsecured	04/30/09	05/15/14	8.75	%	$	300.0	$	300.0
Unsecured	02/05/10	05/15/15	4.75	%	250.0		250.0
Unsecured	11/19/10	07/15/16	3.50	%	250.0		250.0
Unsecured	05/27/11	06/01/21	4.85	%	250.0		250.0
Unsecured	06/11/12	06/15/22	4.75	%	250.0		—
Unsecured	02/06/08	02/15/18	6.00	%	200.0		200.0
Unsecured	03/03/06	03/01/16	5.80	%	200.0		200.0
Secured	11/06/08	11/15/13	9.00	%	159.9		168.3
Unsecured	12/22/05	12/22/15	5.75	%	100.0		115.0
Unsecured	09/20/11	07/15/16	3.50	%	100.0		100.0
Unsecured	04/14/05	04/15/15	5.70	%	100.0		100.0
Unsecured	09/20/11	06/01/21	4.85	%	50.0		50.0
Unsecured	12/27/10	10/31/18	3.84	%	21.1		20.7
Unsecured	11/29/10	11/30/18	3.70	%	19.8		20.7
Unsecured	09/24/09	10/01/12	4.75	%	—		300.0
Unsecured	10/11/06	02/15/12	5.50	%	—		200.0
Unsecured	03/29/06	12/11/12	3.49	%	—		40.5
Unsecured	12/18/07	11/30/12	4.70	%	—		27.2
Unsecured	06/29/07	05/31/12	4.25	%	—		22.7
Unsecured	02/11/02	07/31/12	5.73	%	—		0.6
Unsecured	02/11/02	01/31/12	5.83	%	—		0.2
Total recourse fixed rate debt					$	2,250.8	$	2,615.9
Recourse Floating Rate Debt *
Unsecured	12/12/11	06/12/17	2.25	%	$	107.5	$	115.0
Unsecured	03/18/08	03/18/14	1.25	%	100.0		150.0
Unsecured	05/17/11	05/17/13	1.50	%	100.0		100.0
Unsecured	12/21/12	12/21/17	1.88	%	100.0		—
Secured	12/19/11	12/19/20	2.10	%	95.5		100.0
Unsecured	06/30/06	06/28/13	0.90	%	70.0		100.0
Unsecured	08/31/12	12/31/19	2.47	%	66.0		—
Unsecured	12/15/10	10/31/15	1.58	%	42.9		49.9
Unsecured	03/29/06	09/30/16	2.09	%	41.2		—
Secured	05/14/09	05/14/14	2.86	%	38.0		41.4
Unsecured	01/12/12	06/12/17	2.25	%	35.0		—
Unsecured	12/18/07	10/31/16	2.01	%	27.7		—
Unsecured	12/06/11	08/31/16	1.56	%	25.8		29.8
Unsecured	06/29/07	09/30/16	2.17	%	18.4		—
Unsecured	09/02/11	11/30/16	1.24	%	13.4		15.6
Unsecured	03/01/10	02/28/15	1.97	%	13.2		13.0
Unsecured	12/31/03	09/30/13	1.73	%	1.8		4.3
Unsecured	12/27/10	06/30/12	2.84	%	—		5.2
Unsecured	11/29/10	12/31/12	2.20	%	—		1.9

72

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

	Date of Issue	Final Maturity	Interest Rate		2012			2011
Unsecured	12/15/03	12/15/12	1.63	%	—			1.2
Unsecured	12/31/03	12/31/12	1.53	%	—			0.3
Total recourse floating rate debt					$	896.4		$	727.6
Nonrecourse Fixed Rate Debt
Secured	09/30/97	09/20/16	6.69	%	$	35.1		$	45.2
Secured	06/13/06	12/31/13	6.26	%	21.4			22.2
Secured	08/01/07	06/30/17	6.77	%	2.5			2.5
Secured	06/16/06	04/29/16	6.80	%	1.3			1.3
Secured	08/01/07	07/31/17	6.78	%	0.8			0.8
Secured	05/29/07	05/31/12	5.84	%	—			3.5
Secured	06/01/07	05/31/12	6.27	%	—			2.4
Secured	05/11/07	05/31/12	6.06	%	—			1.4
Total nonrecourse fixed rate debt					$	61.1		$	79.3
Nonrecourse Floating Rate Debt *
Secured	Various	05/08/14	1.46	%	$	49.3		$	51.0
Secured	Various	01/15/15	1.46	%	23.5			24.4
Total nonrecourse floating rate debt					$	72.8		$	75.4
Total debt principal					$	3,281.1		$	3,498.2
Debt discount, net					(8.3		)	(9.3		)
Debt adjustment for fair value hedges					10.2			15.3
Total Debt					$	3,283.0		$	3,504.2

_________

(*) Floating rates as of December 31, 2012.

Maturities of GATX’s debt obligations as of December 31, 2012, were as follows (in millions):

	Debt Principal
2013	$	485.7
2014	513.6
2015	552.5
2016	626.9
2017	236.2
Thereafter	866.2
Total debt principal	$	3,281.1

At December 31, 2012, $606.7 million of GATX’s operating assets were pledged as collateral for notes or other obligations.

Shelf Registration Statement

GATX maintains an effective shelf registration statement on file with the SEC that enables it to issue public debt securities and pass-through certificates. The registration statement expires in August 2013.

Restrictive Covenants

GATX’s $560 million revolving credit facility contains various restrictive covenants, including requirements to maintain a fixed charge coverage ratio and an asset coverage test. GATX’s ratio of earnings to fixed charges, as defined in this facility, was 1.8 for the period ended December 31, 2012, in excess of the minimum covenant ratio of 1.2. At December 31, 2012, GATX was in compliance with all covenants and conditions of the facility. Certain of GATX’s bank term loans have the same financial covenants as the facility.

73

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

The indentures for GATX’s public debt also contain various restrictive covenants, including limitation on liens provisions, that limit the amount of additional secured indebtedness that GATX may incur to $918.6 million as of December 31, 2012. Additionally, certain exceptions to the covenants permit GATX to incur an unlimited amount of purchase money and nonrecourse indebtedness. At December 31, 2012, GATX was in compliance with all covenants and conditions of the indentures.

The loan agreements for certain of GATX’s wholly-owned European subsidiaries (collectively, “GRE”) also contain restrictive covenants, including leverage and cash flow covenants specific to those subsidiaries, restrictions on making loans and limitations on the ability of these subsidiaries to repay loans to certain related parties (including GATX) and to pay dividends to GATX. The covenants relating to loans and dividends effectively limit the ability of GRE to transfer funds to GATX. At December 31, 2012, the maximum amount that GRE could transfer to GATX without violating its covenants was $81.4 million, implying that $389.7 million of subsidiary net assets were restricted. At December 31, 2012, GRE was in compliance with all covenants and conditions of these loan agreements.

Another subsidiary’s financing, guaranteed by GATX, contains various restrictive covenants, including requirements for GATX to maintain a defined net worth and a fixed charge coverage ratio. This fixed charge coverage ratio covenant is less restrictive than that contained in the revolving credit facility.

GATX does not anticipate any covenant violations nor does it anticipate that any of these covenants will restrict its operations or its ability to procure additional financing.

NOTE 9. Fair Value Disclosure

The following tables set forth GATX’s assets and liabilities measured at fair value on a recurring basis as of December 31 (in millions):

Assets	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total December 31, 2012
Interest rate derivatives (a)	$	—	$	10.2	$	—	$	10.2
Available for sale equity securities	3.3		—		—		3.3
Liabilities
Interest rate derivatives (a)	—		1.0		—		1.0
Interest rate derivatives (b)	—		0.3		—		0.3
Foreign exchange rate derivatives (b)	—		2.1		—		2.1

Assets	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total December 31, 2011
Interest rate derivatives (a)	$	—	$	15.3	$	—	$	15.3
Foreign exchange rate derivatives (b)	—		2.1		—		2.1
Available for sale equity securities	2.9		—		—		2.9
Liabilities
Interest rate derivatives (a)	—		2.1		—		2.1
Interest rate derivatives (b)	—		0.3		—		0.3

_________

(a)     Designated as hedges

(b)     Not designated as hedges

74

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Available for sale equity securities are valued based on quoted prices on an active exchange. Derivatives are valued using a pricing model with inputs (such as yield curves and credit spreads) that are observable in the market or can be derived principally from or corroborated by observable market data.

The following table sets forth certain disclosures relating to GATX’s non-recurring Level 3 fair value measurements in 2012 and 2011(in millions):

	Fair Value of Assets		Impairment Losses
2012
Investment in affiliated companies	$	32.9	$	14.8
Operating assets	0.7		0.7
2011
Operating assets	2.8		4.1

In 2012, impairment losses related to the Enerven affiliate and a corporate aircraft on lease. In 2011, impairment losses related to the corporate aircraft on lease and a helicopter held for sale. The fair value of the Enerven affiliate was primarily based on expected final proceeds to be received after all sale and liquidation proceedings are concluded. The fair values of the operating assets were based primarily on the expected future proceeds to be received from the assets, including their disposition.

Derivative instruments

Fair Value Hedges — GATX uses interest rate swaps to convert fixed rate debt to floating rate debt and to manage the fixed to floating rate mix of its debt obligations. For fair value hedges, changes in fair value of both the derivative and the hedged item are recognized in earnings as interest expense. As of December 31, 2012 and 2011, GATX had one instrument and three instruments outstanding, respectively, with an aggregate notional amount of $100.0 million and $350.0 million, respectively. As of December 31, 2012, this derivative had a maturity in 2015.

Cash Flow Hedges — GATX uses interest rate swaps to convert floating rate debt to fixed rate debt and to manage the fixed to floating rate mix of its debt obligations. GATX also uses interest rate swaps and Treasury rate locks to hedge its exposure to interest rate risk on existing and anticipated transactions. As of December 31, 2012 and 2011, GATX had 12 instruments and 11 instruments outstanding, respectively, with an aggregate notional amount of $129.2 million and $73.4 million, respectively. As of December 31, 2012, these derivatives had maturities ranging from 2013-2019. Within the next 12 months, GATX expects to reclassify $6.8 million ($4.3 million after-tax) of net losses on previously terminated derivatives from accumulated other comprehensive income (loss) to earnings. Amounts are reclassified when interest and operating expense related to the hedged risks affect earnings.

Non-designated Derivatives — GATX does not hold or issue derivative financial instruments for purposes other than hedging, although certain derivatives are not designated as accounting hedges. Changes in the fair value of these derivatives are recognized in earnings immediately.

Certain of GATX’s derivative instruments contain credit risk provisions that could require GATX to make immediate payment on net liability positions in the event that GATX defaulted on certain outstanding debt obligations. The aggregate fair value of all derivative instruments with credit risk related contingent features that are in a liability position as of December 31, 2012, was $3.4 million. GATX is not required to post any collateral on its derivative instruments and does not expect the credit risk provisions to be triggered.

In the event that a counterparty fails to meet the terms of the interest rate swap agreement or a foreign exchange contract, GATX’s exposure is limited to the fair value of the swap if in GATX’s favor. GATX manages the credit risk of counterparties by transacting only with institutions that the Company considers financially sound and by avoiding concentrations of risk with a single counterparty. GATX considers the risk of non-performance by a counterparty to be remote.

75

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

The income statement and other comprehensive income (loss) impacts of GATX’s derivative instruments for the years ended December 31 were (in millions):

Derivative Designation	Location of Gain (Loss) Recognized	2012			2011			2010
Fair value hedges *	Interest expense	$	5.0		$	2.3		$	(7.4	)
Cash flow hedges	Other comprehensive loss (effective portion)	(0.2		)	(5.9		)	(8.1		)
Cash flow hedges	Interest expense (effective portion reclassified from accumulated other comprehensive loss)	4.2			2.5			7.7
Cash flow hedges	Operating lease expense (effective portion reclassified from accumulated other comprehensive loss)	1.4			1.5			1.5
Cash flow hedges	Other (expense) income (ineffective portion)	(0.1		)	—			(0.1		)
Non-designated	Other (expense) income	(5.0		)	1.8			0.4

_________

(*) Equally offsetting the amount recognized in interest expense was the fair value adjustment relating to the underlying debt.

Other Financial Instruments

The carrying amounts of cash and cash equivalents, restricted cash, rent and other receivables, accounts payable, and commercial paper and bank credit facilities approximate fair value due to the short maturity of those instruments. The fair values of investment funds are based on the best information available and may include quoted investment fund values. The fair values of loans and fixed and floating rate debt were estimated based on discounted cash flow analyses using interest rates currently offered for loans with similar terms to borrowers of similar credit quality. The following table sets forth the carrying amounts and fair values of GATX’s other financial instruments as of December 31 (in millions):

	2012		2012		2011		2011
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets
Investment Funds	$	2.5	$	5.8	$	2.7	$	7.4
Loans	27.2		27.7		30.4		30.7
Liabilities
Recourse fixed rate debt	$	2,343.3	$	2,513.4	$	2,627.2	$	2,754.9
Recourse floating rate debt	809.1		807.9		727.6		714.8
Nonrecourse debt	130.6		138.2		149.4		159.3

NOTE 10. Pension and Other Post-Retirement Benefits

GATX maintains both funded and unfunded noncontributory defined benefit pension plans covering its domestic employees and the employees of certain of its subsidiaries. GATX also has a funded noncontributory defined benefit pension plan related to a former business in the United Kingdom (“U.K.”), which has no active employees. Benefits payable under the pension plans are based on years of service and/or final average salary. GATX’s funding policies for the pension plans are based on actuarially determined cost methods allowable under IRS regulations and statutory requirements in the U.K.

In addition to the pension plans, GATX has other post-retirement plans providing health care, life insurance and other benefits for certain retired domestic employees who meet established criteria. Most domestic employees are eligible for health care and life insurance benefits if they retire from GATX with immediate benefits under the GATX pension plan. The other post-retirement plans are either contributory or noncontributory, depending on various factors.

76

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

GATX uses a December 31 measurement date for all of its plans. The following tables set forth pension obligations and plan assets and other post-retirement obligations as of December 31 (in millions):

	2012			2011			2012			2011
							Retiree Health and Life			Retiree Health and Life
	Pension Benefits			Pension Benefits
Change in Benefit Obligation
Benefit obligation at beginning of year	$	425.0		$	413.2		$	44.8		$	46.6
Service cost	5.7			5.4			0.2			0.2
Interest cost	19.7			20.7			2.0			2.2
Actuarial loss	49.2			13.5			4.9			—
Benefits paid	(27.4		)	(27.5		)	(3.8		)	(4.2		)
Effect of foreign exchange rate changes	1.6			(0.3		)	—			—
Benefit obligation at end of year	$	473.8		$	425.0		$	48.1		$	44.8
Change in Fair Value of Plan Assets
Plan assets at beginning of year	377.5			392.7			—			—
Actual return on plan assets	55.3			10.2			—			—
Effect of exchange rate changes	1.6			(0.1		)	—			—
Company contributions	2.1			2.2			3.8			4.2
Benefits paid	(27.4		)	(27.5		)	(3.8		)	(4.2		)
Plan assets at end of year	$	409.1		$	377.5		$	—		$	—
Funded Status at end of year	$	(64.7	)	$	(47.5	)	$	(48.1	)	$	(44.8	)
Amount Recognized
Other liabilities	$	(64.7	)	$	(47.5	)	$	(48.1	)	$	(44.8	)
Accumulative other comprehensive loss:
Net actuarial loss	207.4			193.5			6.8			1.8
Prior service credit (cost)	(4.1		)	(5.1		)	0.2			—
Accumulated other comprehensive loss	203.3			188.4			7.0			1.8
Total recognized	$	138.6		$	140.9		$	(41.1	)	$	(43.0	)
After-tax amount recognized in accumulated other comprehensive loss	$	126.8		$	117.6		$	4.3		$	1.1

The aggregate accumulated benefit obligation for the defined benefit pension plans was $453.7 million and $408.9 million at December 31, 2012 and 2011, respectively.

Information for pension plans with a projected benefit obligation in excess of plan assets is as followes as of December 31 (in millions):

	2012		2011
Projected benefit obligations	$	473.8	$	425.0
Fair value of plan assets	409.1		377.5

Information for pension plans with an accumulated benefit obligation in excess of plan assets is as follows as of December 31 (in millions):

	2012		2011
Accumulated benefit obligations	$	453.7	$	408.9
Fair value of plan assets	409.1		377.5

77

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

The components of net periodic (benefit) cost for the year ended December 31 were (in millions):

										2012 Retiree Health and Life			2011 Retiree Health and Life			2010 Retiree Health and Life
	2012 Pension Benefits			2011 Pension Benefits			2010 Pension Benefits
Service cost	$	5.7		$	5.4		$	5.3		$	0.2		$	0.2		$	0.2
Interest cost	19.7			20.7			22.1			2.0			2.2			2.4
Expected return on plan assets	(29.6		)	(33.2		)	(33.5		)	—			—			—
Amortization of:
Unrecognized prior service credit	(1.0		)	(1.0		)	(1.0		)	(0.1		)	(0.1		)	(0.1		)
Unrecognized net actuarial loss (gain)	9.9			7.2			6.0			(0.1		)	(0.3		)	(0.3		)
Net periodic (benefit) cost	$	4.7		$	(0.9	)	$	(1.1	)	$	2.0		$	2.0		$	2.2

GATX amortizes the unrecognized prior service credit using a straight-line method over the average remaining service period of employees expected to receive benefits under the plan. The unrecognized net actuarial loss (gain), subject to certain averaging conventions, is amortized over the average remaining service period of active employees.

As of December 31, 2012, GATX expects within the next twelve months to recognize the following amounts included in accumulated other comprehensive loss (gain) as components of net periodic cost (in millions):

	2013
	Pension Benefits			Retiree Health and Life
Unrecognized net actuarial loss (gain)	$	14.0		$	(0.2	)
Unrecognized prior service credit	(1.0		)	(0.1		)

78

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

GATX used the following assumptions to measure the benefit obligation, compute the expected long-term return on assets and measure the periodic cost for GATX’s defined benefit pension plans and other post-retirement benefit plans for the years ended December 31:

	2012		2011
Domestic defined benefit pension plans
Benefit Obligation at December 31:
Discount rate — salaried funded and unfunded plans	3.95	%	4.80	%
Discount rate — hourly funded plan	4.05	%	4.85	%
Rate of compensation increases — salaried funded and unfunded plans	3.00	%	3.00	%
Rate of compensation increases — hourly funded plans	N/A		N/A
Net Periodic Cost (Benefit) for the years ended December 31:
Discount rate — salaried funded and unfunded plans	4.80	%	5.25	%
Discount rate — hourly funded plan	4.85	%	5.25	%
Expected return on plan assets — salaried funded plan	8.05	%	8.65	%
Expected return on plan assets — hourly funded plan	7.10	%	7.80	%
Rate of compensation increases — salaried funded and unfunded plans	3.00	%	4.50	%
Rate of compensation increases — hourly funded plan	N/A		N/A
Foreign defined benefit pension plan
Benefit Obligation at December 31:
Discount rate	4.25	%	4.65	%
Rate of pension-in-payment increases	3.00	%	2.90	%
Net Periodic Cost (Benefit) for the years ended December 31:
Discount rate	4.65	%	5.40	%
Expected return on plan assets	5.77	%	6.12	%
Rate of pension-in-payment increases	2.90	%	3.40	%
Other post-retirement benefit plans
Benefit Obligation at December 31:
Discount rate - salaried health	3.65	%	4.50	%
Discount rate - hourly health	3.60	%	4.60	%
Discount rate - salaried life insurance	3.90	%	4.75	%
Discount rate - hourly life insurance	3.45	%	4.45	%
Rate of compensation increases	N/A		N/A
Net Periodic Cost (Benefit) for the years ended December 31:
Discount rate - salaried health	4.50	%	4.95	%
Discount rate - hourly health	4.60	%	4.95	%
Discount rate - salaried life insurance	4.75	%	4.95	%
Discount rate - hourly life insurance	4.45	%	4.95	%
Rate of compensation increases	N/A		N/A

79

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

The discount rate is used by GATX to calculate the present value of expected future pension and post-retirement cash flows as of the measurement date. The discount rate is based on yields for high-quality, long-term bonds, with durations similar to that of the projected benefit obligation. The expected return on plan assets is based on current and expected asset allocations, as well as historical and expected returns on various categories of plan assets. GATX routinely reviews its historical returns along with current market conditions to ensure its expected return assumption is reasonable and appropriate.

	2012		2011
Assumed Health Care Cost Trend Rates at December 31
Health care cost trend assumed for next year
Medical claims	7.00	%	7.50	%
Prescription drugs claims	6.50	%	7.50	%
Rate to which the cost trend is expected to decline (the ultimate trend rate)
Medical claims	5.00	%	5.00	%
Prescription drugs claims	5.00	%	5.00	%
Year that rate reaches the ultimate trend rate
Medical claims	2019		2018
Prescription drugs claims	2017		2018

The health care cost trend, which is comprised of medical and prescription drug claims, has a significant effect on the other post-retirement benefit cost and obligation. A one-percentage-point change in the trend rate would have the following effects (in millions):

	One-Percentage-Point Increase		One-Percentage-Point Decrease
Effect on total of service and interest cost	$	0.1	$	(0.1	)
Effect on post-retirement benefit obligation	2.5		(2.2		)

GATX’s investment policies require that asset allocations of domestic and foreign funded pension plans be maintained at certain targets. GATX’s weighted-average asset allocations of its domestic funded pension plans at December 31, 2012 and 2011, and current target asset allocation for 2012, by asset category, are as follows:

			Plan Assets at December 31
	Target		2012		2011
Asset Category
Equity securities	66.0	%	65.3	%	64.1	%
Debt securities	29.0	%	28.9	%	30.1	%
Real estate	5.0	%	5.8	%	5.2	%
Cash	—		—		0.6	%
	100.0	%	100.0	%	100.0	%

GATX’s weighted-average asset allocations of its foreign funded pension plan at December 31, 2012 and 2011, and current target asset allocation for 2013, by asset category, are as follows:

			Plan Assets at December 31
	Target		2012		2011
Asset Category
Equity securities	36.8	%	36.2	%	36.1	%
Debt securities	63.2	%	63.8	%	63.9	%
	100.0	%	100.0	%	100.0	%

80

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

The following tables set forth the fair value of GATX’s pension plan assets as of December 31 (in millions):

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs  ( Level 3)		Total December 31,
							2012
Assets
Short-term investment funds	$	1.0	$	—	$	—	$	1.0
Common stock	10.3		—		—		10.3
Common stock collective funds	—		245.0		—		245.0
Fixed income collective trust funds	—		131.2		—		131.2
Real estate collective trust funds	—		21.6		—		21.6
Total	$	11.3	$	397.8	$	—	$	409.1

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs  ( Level 3)		Total December 31,
							2011
Assets
Short-term investment funds	$	2.9	$	—	$	—	$	2.9
Common stock	8.9		—		—		8.9
Common stock collective funds	—		222.5		—		222.5
Fixed income collective trust funds	—		125.3		—		125.3
Real estate collective trust funds	—		17.9		—		17.9
Total	$	11.8	$	365.7	$	—	$	377.5

The following is a description of the valuation techniques and inputs used as of December 31, 2012 and 2011:

Short-term investment funds: Valued based on the closing net asset values (NAV) quoted by the funds. The NAV represents the unitized fair values of the underlying securities held by the trusts, which are traded in an active market. Short-term investment funds are highly liquid investments in obligations of the U.S. Government, its agencies or instrumentalities, and related money market instruments. There are no unfunded commitments, restrictions on redemption frequency, or advance notice periods required for redemption.

Common stock: Traded in an active market and valued at the last reported sales price on the last business day of the plan year.

Common stock and fixed income collective trust funds: Valued based on the closing NAV prices quoted by the funds. The NAV represents the unitized fair values of the underlying securities held by the trusts, which are traded in an active market. There are no unfunded commitments, restrictions on redemption frequency, or advance notice periods required for redemption for any of the collective trusts. The common stock funds each have an investment objective of long-term total return through capital appreciation and current income. The fixed income funds are each designed to deliver safety and stability by preserving principal and accumulated earnings.

Real estate collective trust funds: Valued based on the NAV provided by the administrators of the funds, which represents the unitized fair values of the underlying U.S. commercial real estate held by the funds. Fair values were determined by independent appraisal of the real estate properties. Redemptions from the real estate funds are available upon either 45 or 60 days’ notice prior to the end of a quarter. Redemptions may be limited and/or delayed by a lack of liquidity in the funds. The real estate funds are diversified by location and property type with an investment objective of long-term return through property appreciation, current income, and timely sales. In 2012, the Company determined that the inputs used to measure the real estate funds at fair value are Level 2 inputs. The fair value disclosures for 2011 have been revised to conform to the 2012 presentation.

81

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

The primary investing objective of the pension plans is to represent the exclusive interests of plan participants for the purpose of providing benefits to participants and their beneficiaries. To achieve this goal, GATX’s philosophy is to invest in a diversified portfolio of equities, debt and real estate investments to maximize return and to keep risk at a reasonable level over a long-term investment horizon. Equity investments are diversified across U.S. and non-U.S. stocks as well as growth, value and small to large capitalizations. Debt securities are predominately invested in long-term, investment-grade corporate bonds. Real estate investments include investments in funds that are diversified by location and property type.

On a timely basis, but not less than twice a year, GATX formally reviews pension plan investments to ensure adherence to investment guidelines and the Company’s stated investment approach. This review also evaluates reasonableness of investment decisions and risk positions. The performance of investments is compared to indices and peers to determine if performance has been acceptable.

In 2013, GATX expects to contribute approximately $7.0 million to its pension and other post-retirement benefit plans. Additional contributions to the domestic funded pension plans will be dependent on several factors, including investment returns on plan assets and actuarial experience.

The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid (in millions):

	Funded Plans		Unfunded Plans		Retiree Health and Life
2013	$	29.2	$	2.0	$	4.4
2014	29.0		1.9		4.3
2015	29.0		1.8		4.0
2016	29.3		2.0		3.9
2017	31.1		2.0		3.6
Years 2018-2022	148.3		11.9		15.0
	$	295.9	$	21.6	$	35.2

The following are estimated Medicare Part D Subsidies expected to be received as a result of the Medicare Prescription Drug, Improvement and Modernization Act of 2003 (in millions):

2013	$	0.5
2014	0.5
2015	0.5
2016	0.5
2017	0.4
Years 2018-2022	2.2
	$	4.6

In addition to its defined benefit plans, GATX maintains two 401(k) retirement plans that are available to substantially all salaried and certain other employee groups. GATX may contribute to the plans as specified by their respective terms and as determined by the Board of Directors. Contributions to such plans were $1.6 million, $1.4 million and zero for 2012, 2011, and 2010, respectively.

82

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Multiemployer Plans

The shipboard personnel at ASC participate in various multiemployer benefit plans that provide pension, health care, post-retirement and other benefits to active and retired employees. Unlike single employer plans, GATX does not recognize plan assets or obligations for multiemployer plans on its balance sheet. Rather, GATX recognizes as marine operating expenses the amounts of its contributions to the plans. The amounts contributed are based on the number of crew hours worked, which is dependent on the number of vessels deployed and aggregate operating days in a particular year. The risks of participating in these multiemployer plans are different from single employer plans in the following aspects:

• Assets contributed by one employer may be used to provide benefits to employees of other participating employers;

• If a participating employer fails to make its required contributions, any unfunded obligations of the plan may be borne by the remaining participating employers; and

• If an employer chooses to stop participating in a multiemployer plan, the withdrawing company may be required to make additional contributions.

GATX’s contributions to multiemployer benefit plans for the years indicated were as follows (in millions):

Multiemployer Plans	EIN and Pension Plan Number	Pension Protection Act Zone Status (b)	GATX Contributions						Collective Bargaining Agreement Expiration Date
			2012		2011		2010
American Maritime Officers Pension Plan (a)	13-1969709-001	Endangered-Yellow	$	1.5	$	2.1	$	2.2	January 15, 2017
Other multiemployer post-retirement plans			6.6		6.4		6.2
Total			$	8.1	$	8.5	$	8.4

__________________

(a)GATX's contributions represented more than 5% of the total contributions to the plan during each year and no surcharge was imposed for any year.

(b)The American Maritime Officers Pension Plan was determined to be in endangered status (i.e. “yellow zone” as defined by the Pension Protection Act of 2006) for the plan year beginning October 1, 2012, because it has funding or liquidity problems, or both. A rehabilitation plan, as defined by the Employee Retirement Security Act of 1974, was instituted under which certain adjustable benefits were reduced or eliminated and GATX is required to contribute at a negotiated rate per day worked by each employee.

NOTE 11. Share-Based Compensation

GATX provides equity awards to its employees under its GATX Corporation 2012 Incentive Award Plan (the “2012 Plan”), which was adopted in 2012 and superseded the GATX Corporation 2004 Equity Incentive Compensation Plan. The plan provides for the granting of stock options, stock appreciation rights (“SARs”), restricted shares and phantom stock awards. As of December 31, 2012, 3.5 million shares were authorized under the 2012 Plan and 3.5 million shares were available for future issuance. GATX recognizes compensation expense for its equity awards in selling, general and administrative expenses over the service period of each award. For 2012, 2011 and 2010, share-based compensation expense was $12.2 million, $11.0 million and $8.0 million, respectively, and related tax benefits were $4.6 million, $4.1 million and $3.0 million, respectively. These awards are more fully described below.

Stock Option and SAR Awards

Stock option and SARs provide for the purchase of shares of common stock and may be granted for periods not longer than seven years from the grant date. SARs entitle the holder to receive the difference between the market price of GATX’s common stock at the time of exercise and the exercise price, either in shares of common stock, cash or a combination thereof, at GATX’s discretion. Options entitle the holder to purchase shares of GATX common stock at a specified exercise price. Dividends accrue on all options and SARs and are paid upon vesting. Dividends continue to be paid until the options or SARs are exercised, cancelled or expire. The exercise price for stock options and SARs is equal to the average of the high and low trading prices of GATX common stock on the date of grant. Compensation expense is recognized on a straight-line basis over the applicable vesting period. Since 2006, only SARs have been awarded. SARs vest and become exercisable in 1/3 annual increments over three years.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

The estimated fair value of a SAR is the sum of the value derived using the Black-Scholes option pricing model and the present value of dividends expected to be paid over the expected term of the SAR. The Black-Scholes valuation incorporates various assumptions, including expected term, expected volatility, and risk free interest rates. Expected term is based on historical exercise patterns and post-vesting terminations. Expected volatility is based on the historical volatility of GATX’s stock price over a period equal to the expected term. Risk-free interest rates are based on the implied yield on U.S. Treasury zero-coupon bond issues with a remaining term equal to the expected term.

The weighted average fair value for GATX’s SARs and the assumptions used to estimate fair value were:

	2012			2011			2010
Weighted average estimated fair value	$	18.48		$	13.88		$	11.13
Quarterly dividend rate	$	0.29		$	0.29		$	0.28
Expected term of SAR, in years	4.7			4.3			4.3
Risk-free interest rate	1.0		%	1.6		%	2.0		%
Dividend yield	2.7		%	3.4		%	4.3		%
Expected stock price volatility	43.3		%	41.9		%	41.8		%
Present value of dividends	$	5.37		$	4.76		$	4.55

Certain data with respect to stock option and SAR activity for the year ended December 31, 2012, were:

	Number of Options and SARs (in thousands)	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value (in millions)
Outstanding at beginning of the year	1,879	$	31.08
Granted	350	43.99
Exercised	(341)	28.99			$	4.9
Forfeited/Cancelled	(10)	37.15
Expired	(6)	38.95
Outstanding at end of the year	1,872	33.82		3.7	18.0
Vested and exercisable at end of the year	1,146	31.48		2.6	13.8

The total intrinsic value of options and SARs exercised during the years ended December 31, 2012, 2011 and 2010 was $4.9 million, $4.5 million and $1.0 million, respectively. As of December 31, 2012, there was $6.3 million of unrecognized compensation expense related to nonvested SARs, which is expected to be recognized over a weighted average period of 1.7 years.

Restricted and Performance Share Awards

Restricted shares entitle the recipient to receive a specified number of restricted shares of common stock upon vesting. Restricted shares do not carry voting rights and are not transferable prior to the expiration of a specified restriction period, generally three years, as determined by the Compensation Committee of the Board of Directors ( the “Compensation Committee”). Dividends accrue on all restricted shares and are paid upon vesting. Compensation expense is recognized for these awards over the applicable vesting period.

Performance shares are restricted shares that are granted to key employees based on the achievement of certain strategic objectives. The shares are converted to common stock based on the achievement of predetermined performance goals at the end of a specified performance period as determined by the Compensation Committee. An estimate of the number of shares expected to vest as a result of actual performance against the performance criteria is made at the time of grant to determine total compensation expense to be recognized. The estimate is reevaluated annually and total compensation expense is adjusted for any changes in the estimate, with a cumulative catch up adjustment (i.e., the cumulative effect of applying the change in estimate retrospectively) recognized in the period of change. Compensation expense is recognized for these awards over the applicable vesting period, generally three years.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

GATX values its restricted and performance share awards based on the average of the high and low values of its stock on the grant date. As of December 31, 2012, there was $6.6 million of unrecognized compensation expense related to these awards, which is expected to be recognized over a weighted average period of 1.8 years.

Certain data with respect to restricted and performance share activity for the year ended December 31, 2012, were:

	Number of Share Units Outstanding		Weighted Average Grant-Date Fair Value
Restricted Shares:
Nonvested at beginning of the year	333,837		$	29.04
Granted	75,580		43.71
Vested	(134,508	)	25.10
Forfeited	(7,919	)	33.87
Nonvested at end of the year	266,990		35.03
Performance Shares:
Nonvested at beginning of the year	188,434		$	30.36
Granted	76,780		44.02
Net increase due to estimated performance	9,567		40.81
Vested	(85,575	)	25.96
Nonvested at end of the year	189,206		38.42

The total fair value of restricted and performance shares that vested during the years ended December 31, 2012, 2011 and 2010, was $5.6 million, $2.7 million and $2.5 million, respectively.

Phantom Stock Awards

Phantom stock is granted to non-employee directors as a component of their compensation for service on GATX’s Board of Directors. In accordance with the terms of the phantom stock awards, each director is credited with a quantity of units that equate to, but are not, common shares in the Company. Phantom stock awards are dividend participating with all dividends reinvested in additional phantom shares at the average of the high and low trading prices of GATX stock on the dividend payment date. Settlement of whole units of phantom stock will be made in shares of common stock and fractional units will be paid in cash at the expiration of each director’s service on the Board and/or in accordance with his or her deferral election. In 2012, GATX granted 20,722 units of phantom stock and 135,261 units were outstanding as of December 31, 2012.

NOTE 12. Income Taxes

Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. U.S. income taxes have not been provided on the undistributed earnings of foreign subsidiaries and affiliates that GATX intends to permanently reinvest in foreign operations. The cumulative amount of such earnings was $551.4 million at December 31, 2012. The ultimate tax cost of these earnings is dependent on tax laws in effect and other circumstances at the time of distribution.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Significant components of GATX’s deferred tax liabilities and assets as of December 31 were (in millions):

	2012			2011
Deferred Tax Liabilities
Book/tax basis difference due to depreciation	$	806.7		$	756.2
Leveraged leases	—			62.7
Investments in affiliated companies	81.6			82.4
Lease accounting (other than leveraged)	12.6			13.7
Other	3.1			2.9
Total deferred tax liabilities	904.0			917.9
Deferred Tax Assets
Alternative minimum tax credit	5.2			8.9
Federal net operating loss	—			38.1
Foreign tax credit	7.3			13.9
Valuation on foreign tax credit	(7.3		)	(13.9		)
State net operating loss	26.6			31.1
Valuation on state net operating loss	(12.8		)	(15.8		)
Foreign net operating loss	9.5			7.3
Accruals not currently deductible for tax purposes	19.1			21.8
Allowance for losses	6.6			5.4
Pension and post-retirement benefits	48.6			40.7
Other	18.2			14.5
Total deferred tax assets	121.0			152.0
Net deferred tax liabilities	$	783.0		$	765.9

At December 31, 2012, GATX had fully utilized its U.S. federal tax net operating loss carryforward of $108.8 million, and its alternative minimum tax credit, which has an unlimited carryforward period, was reduced to $5.2 million.

At December 31, 2012, GATX had foreign tax credits of $7.3 million that are scheduled to expire beginning in 2015. A $7.3 million valuation allowance has been recorded as the Company believes it is more likely than not that it will be unable to utilize these credits. GATX also had state net operating losses of $26.6 million, net of federal benefit, that are scheduled to expire at various times beginning in 2013. A $12.8 million valuation allowance has been recorded as the Company believes it is more likely than not that it will be unable to utilize all of these losses. Additionally, GATX has a foreign net operating loss of $9.5 million that has an unlimited carryforward period. Utilization of future tax credits and net operating losses will be dependent on a number of variables, including the amount of taxable income, foreign source income attributes and state apportionment factors.

A reconciliation of the beginning and ending amount of gross liability for unrecognized tax benefits is as follows (in millions):

	2012			2011
Beginning balance	$	20.8		$	42.7
Reductions due to expiration of the applicable statute of limitations	(16.1		)	—
Reductions due to settlement of audit issues	—			(21.9		)
Ending balance	$	4.7		$	20.8

At December 31, 2012, GATX’s gross liability for unrecognized tax benefits was $4.7 million of which $3.2 million, if recognized, would favorably impact income tax expense. Subject to the completion of certain audits, the Company believes it is reasonably possible that, within the next 12 months, unrecognized tax benefits of $0.4 million may be recognized. During the year ended December 31, 2012, upon expiration of the applicable statute of limitations, GATX released a gross unrecognized tax benefit of $16.1 million (net tax expense impact of $15.5 million). During the year ended December 31, 2011, the Company settled several open audit years resulting in the release of gross unrecognized tax benefits totaling $21.9 million (net tax expense impact of $4.8 million). The Company recognizes interest and penalties related to unrecognized tax benefits as income tax expense. No amounts have been accrued for penalties. To the extent interest is not assessed or otherwise reduced with respect to uncertain tax positions, any required adjustment will be recorded as a reduction of income tax expense.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

GATX files numerous consolidated and separate income tax returns in the U.S. federal jurisdiction, as well as various state and foreign jurisdictions. All federal examinations with respect to GATX’s U.S. tax returns for years prior to 2009 have been closed. The Company and its subsidiaries are undergoing audits in various state and foreign jurisdictions.

The components of income before income taxes, excluding domestic and foreign joint ventures, for the years ending December 31 consisted of (in millions):

	2012		2011		2010
Domestic	$	80.5	$	39.5	$	5.1
Foreign	63.3		68.1		54.2
	$	143.8	$	107.6	$	59.3

GATX and its U.S. subsidiaries file a consolidated federal income tax return. Income taxes, excluding domestic and foreign joint ventures, for the years ending December 31 consisted of (in millions):

	2012			2011		2010
Current
Domestic:
Federal	$	(8.8	)	$	0.7	$	(0.2	)
State and local	2.5			0.8		0.8
	(6.3		)	1.5		0.6
Foreign	8.0			5.0		5.0
	1.7			6.5		5.6
Deferred
Domestic:
Federal	16.0			8.9		(3.1		)
State and local	(3.1		)	0.5		0.3
	12.9			9.4		(2.8		)
Foreign	11.5			13.3		4.2
	24.4			22.7		1.4
Income taxes	$	26.1		$	29.2	$	7.0

The reasons for the difference between GATX’s effective income tax rate and the federal statutory income tax rate for the years ending December 31 were (in millions):

	2012			2011			2010
Income taxes at federal statutory rate	$	50.4		$	37.7		$	20.8
Adjust for effect of:
Foreign tax credits	(13.7		)	(0.1		)	—
Foreign earnings taxed at lower rates	(4.1		)	(6.7		)	(2.7		)
Tax effect of foreign dividends	6.3			—			—
Expiration of the applicable statute of limitations	(15.5		)	—			—
Settlement of audit issues	—			(4.8		)	(9.5		)
Corporate owned life insurance	(0.3		)	(0.2		)	(2.4		)
State income taxes	1.9			1.1			0.1
Other	1.1			2.2			0.7
Income taxes	$	26.1		$	29.2		$	7.0
Effective income tax rate	18.2		%	27.1		%	11.8		%

The 2012 effective income tax rate was impacted by the utilization of foreign tax credits offset by incremental income and withholding taxes on foreign dividends. Additionally, 2012 included a $15.5 million benefit that was recognized upon the expiration of the applicable statute of limitations. In each of 2011 and 2010, the effective income tax rate was impacted by the resolution of various foreign, federal,

87

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

and state tax audit issues. The adjustment for foreign earnings reflects the impact of lower tax rates on income earned at GATX's foreign subsidiaries.

State income taxes are provided on domestic pre-tax income or loss. The effect of state income tax on the overall income tax rate is impacted by the amount of domestic income subject to state taxes relative to total worldwide income.

NOTE 13. Concentrations

Concentration of Revenues — GATX’s revenues are derived from a wide range of industries and companies. Approximately 23% of total revenues are generated from customers in the chemical industry, 20% from the petroleum industry, 15% from transportation industry, 12% from the steel industry and 11% from the food/agriculture industries. GATX’s foreign identifiable revenues were primarily generated in the countries of Canada, Germany, Poland, Mexico and Austria.

Concentration of Credit Risk — The Company does not have any revenue concentrations from any particular customer for any of the years ended December 31, 2012, 2011 and 2010. Under its lease agreements with lessees, GATX typically retains legal ownership of the asset except where such assets have been financed by sale-leasebacks. GATX performs a credit evaluation prior to approval of a lease contract. Subsequently, the creditworthiness of the customer and the value of the collateral are monitored on an ongoing basis. GATX maintains an allowance for losses to provide for credit losses inherent in its reservable assets portfolio.

Concentration of Labor Force — As of December 31, 2012, 35% of GATX's employees were covered by collective bargaining agreements and 4% of GATX's employees were covered by collective bargaining agreements that have expired or will expire within the next year. The hourly employees at GATX’s U.S. service centers belong to the United Steelworkers. Employees at three of GATX’s Canadian service centers belong to the Communication, Energy and Paperworkers Union of Canada. The shipboard personnel at ASC belong to the American Maritime Officers and the Seafarers International Union.

NOTE 14. Commercial Commitments

In connection with certain investments or transactions, GATX has entered into various commercial commitments, such as guarantees and standby letters of credit, which could potentially require performance in the event of demands by third parties. Similar to GATX’s balance sheet investments, these guarantees expose GATX to credit, market and equipment risk; accordingly, GATX evaluates its commitments and other contingent obligations using techniques similar to those used to evaluate funded transactions.

The following table shows GATX’s commercial commitments as of December 31 (in millions):

	2012		2011
Affiliate guarantees	$	42.0	$	42.0
Asset residual value guarantees	11.2		33.9
Lease payment guarantees	41.0		47.0
Performance bonds	0.6		1.3
Standby letters of credit	9.7		9.8
Total commercial commitments *	$	104.5	$	134.0

__________________

(*) At December 31, 2012, the carrying value of liabilities on the balance sheet for commercial commitments was $6.4 million. The expirations of these commitments range from 2013 to 2022. GATX is not aware of any event that would require it to satisfy any of these commitments.

Affiliate guarantees generally involve guaranteeing repayment of the financing utilized to acquire assets and are in lieu of making direct equity investments in the affiliate. Affiliate guarantees exclude an affiliate guarantee for which no stated maximum potential future payment is provided and for which the likelihood of performance under the guarantee is considered remote. GATX is not aware of any event that would require it to satisfy these guarantees and expects the affiliates to generate sufficient cash flow to satisfy their financing obligations.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Asset residual value guarantees represent GATX’s commitment to third parties that an asset or group of assets will be worth a specified amount at the end of a lease term. GATX earns an initial fee for providing these asset value guarantees, which is amortized into income over the guarantee period. Upon disposition of the assets, GATX receives a share of any proceeds in excess of the amount guaranteed and such residual sharing gains are recorded in net gain on asset dispositions. If, at the end of the lease term, the net realizable value of the asset is less than the guaranteed amount, any liability resulting from GATX’s performance pursuant to these guarantees will be reduced by the value realized from disposition of the asset.

Lease payment guarantees represent GATX’s guarantee of third-party lease payments to financial institutions. Any liability resulting from GATX’s performance pursuant to these guarantees will be reduced by the value realized from the underlying asset or group of assets.

GATX and its subsidiaries are also parties to standing letters of credit and performance bonds primarily related to workers’ compensation and general liability insurance coverages. No material claims have been made against these obligations and as of December 31, 2012, GATX does not expect any material losses to result from these obligations as performance is not anticipated to be required.

NOTE 15. Earnings per Share

Basic earnings per share were computed by dividing net income available to common shareholders by the weighted average number of shares of common stock outstanding during each year. Shares issued or reacquired during the year, if applicable, were weighted for the portion of the year that they were outstanding. Diluted earnings per share give effect to potentially dilutive securities, including convertible preferred stock, employee stock options/SARs, restricted stock and convertible debt and equity compensation awards.

The following table sets forth the computation of basic and diluted net income per common share for the years ending December 31 (in millions, except per share data):

	2012		2011		2010
Numerator:
Net income	$	137.3	$	110.8	$	80.8
Numerator for basic earnings per share — income available to common shareholders	$	137.3	$	110.8	$	80.8
Effect of dilutive securities:
After-tax interest expense on convertible securities	—		—		0.2
Numerator for diluted earnings per share — income available to common shareholders	$	137.3	$	110.8	$	81.0
Denominator:
Denominator for basic earnings per share — weighted average shares	46.8		46.4		46.1
Effect of dilutive securities:
Equity compensation plans	0.7		0.7		0.5
Convertible preferred stock	0.1		0.1		0.1
Convertible securities	—		—		0.3
Denominator for diluted earnings per share — adjusted weighted average and assumed conversion	47.6		47.2		47.0
Basic earnings per share	$	2.93	$	2.39	$	1.75
Diluted earnings per share	$	2.88	$	2.35	$	1.72

NOTE 16. Goodwill

Goodwill was $91.7 million and $90.5 million as of December 31, 2012 and 2011, respectively. In the fourth quarter of 2012, GATX performed a review for impairment of goodwill, concluding that goodwill was not impaired. For 2012 and 2011, changes in the carrying amount of GATX’s goodwill, all of which pertains to Rail North America and Rail International, were the result of changes in foreign currency exchange rates.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

NOTE 17. Allowance for Losses

The following summarizes changes in the allowance for losses at December 31 (in millions):

	2012			2011
Beginning balance	$	11.8		$	11.6
(Reversal) provision for losses	(0.6		)	0.2
Charges to allowance	(7.8		)	(0.5		)
Recoveries and other, including foreign exchange adjustments	1.2			0.5
Ending balance	$	4.6		$	11.8

The allowance for losses is comprised of general allowances for trade receivables and specific allowances for finance leases. As of December 31, 2012, general allowances for trade receivables were $3.4 million or 3.9% of rent and other receivables compared to $2.8 million or 3.7% at December 31, 2011. Specific allowances for finance leases were $1.2 million at December 31, 2012, compared to $9.0 million at December 31, 2011. The decrease in specific allowances was primarily related to the sale of a non-performing leveraged lease investment.

NOTE 18. Other Assets and Other Liabilities

The following table summarizes the components of Other Assets reported on the consolidated balance sheets as of December 31 (in millions):

	2012		2011
Inventory	$	49.1	$	42.1
Office furniture, fixtures and other equipment, net of accumulated depreciation	35.8		32.7
Derivatives	10.2		17.4
Deferred financing costs	14.8		16.1
Assets held for sale	10.1		0.5
Other investments	6.5		6.4
Prepaid items	9.5		12.5
Other	50.7		52.4
	$	186.7	$	180.1

The following table summarizes the components of Other Liabilities reported on the consolidated balance sheets as of December 31 (in millions):

	2012		2011
Accrued operating lease expense	$	56.3	$	67.3
Pension and other post-retirement liabilities	112.8		92.3
Deferred gains on sale-leasebacks	47.2		34.9
Unrecognized tax benefits	3.2		18.8
Environmental reserves	15.6		16.7
Deferred income	11.8		15.4
Derivatives	3.4		2.4
Other	32.6		33.8
	$	282.9	$	281.6

NOTE 19. Shareholders’ Equity

In 2008, the Company’s Board of Directors authorized a $200 million common stock repurchase program of which $68.4 million was available as of December 31, 2012.

In accordance with GATX’s certificate of incorporation, 120 million shares of common stock are authorized, at a par value of $0.625 per share. As of December 31, 2012, 66.0 million shares were issued and 46.9 million shares were outstanding.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

The following shares of common stock were reserved as of December 31, 2012:

	Shares  (in millions)
Conversion of outstanding preferred stock	0.1
Share-based compensation award plans	6.5
	6.6

GATX’s certificate of incorporation also authorizes five million shares of preferred stock at a par value of $1.00 per share. At December 31, 2012 and 2011, 15,567 and 16,644 shares of preferred stock were outstanding, respectively. Shares of preferred stock issued and outstanding consist of Series A and B $2.50 cumulative convertible preferred stock, which entitle holders to a cumulative annual cash dividend of $2.50 per share. Each share is convertible at the option of the holder at any time into five shares of common stock. Each share of such preferred stock may be called for redemption by GATX at any time at $63.00 per share. In the event of GATX’s liquidation, dissolution or winding up, the holders of such preferred stock will be entitled to receive $60.00 per share plus accrued and unpaid dividends to the date of payment. At December 31, 2012 and 2011, the aggregated liquidation preference of both series of preferred stocks was $0.9 million and $1.0 million, respectively.

Holders of both preferred and common stock are entitled to one vote for each share held. Except in certain instances, all such classes of stock vote together as a single class.

NOTE 20. Accumulated Other Comprehensive Income (Loss)

The change in components for accumulated other comprehensive income (loss) were as follows (in millions):

	Foreign    Currency  Translation  Gain (Loss)			Unrealized  Gain (Loss) on Securities			Unrealized Loss on    Derivative Instruments			Post- RetirementBenefit Plans			Total
Balance at December 31, 2009	$	74.4		$	(1.7	)	$	(52.2	)	$	(105.0	)	$	(84.5	)
Change in component	(28.4		)	1.4			(12.2		)	3.7			(35.5		)
Reclassification adjustments into earnings	—			—			9.2			4.5			13.7
Income tax effect	—			(0.1		)	(0.5		)	(3.1		)	(3.7		)
Balance at December 31, 2010	46.0			(0.4		)	(55.7		)	(99.9		)	(110.0		)
Change in component	(41.2		)	(1.2		)	(6.6		)	(36.0		)	(85.0		)
Reclassification adjustments into earnings	1.6			0.9			4.0			5.8			12.3
Income tax effect	—			0.1			2.1			11.4			13.6
Balance at December 31, 2011	6.4			(0.6		)	(56.2		)	(118.7		)	(169.1		)
Change in component	25.0			0.5			6.2			(28.8		)	2.9
Reclassification adjustments into earnings	—			(0.4		)	6.5			8.7			14.8
Income tax effect	—			0.1			(1.0		)	7.7			6.8
Balance at December 31, 2012	$	31.4		$	(0.4	)	$	(44.5	)	$	(131.1	)	$	(144.6	)

NOTE 21. Foreign Operations

Revenues are determined to be foreign or domestic based upon location of the customer. Assets are determined based on ownership of the assets. The Company did not derive revenues in excess of 10% of consolidated revenues from any one foreign country for the years ended December 31, 2012, 2011 and 2010. At December 31, 2012, 8% and 7% of the Company’s identifiable assets were in Canada and Germany, respectively. At December 31, 2011, 9% and 8% of the Company’s identifiable assets were in Germany and Canada, respectively. At December 31, 2010, 10% of the Company’s identifiable assets were in Canada and Germany.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

The table below presents certain GATX data for the years ending or as of December 31 (in millions):

	2012		2011		2010
Revenues
Foreign	$	279.8	$	278.6	$	270.7
United States	963.4		912.8		843.3
	$	1,243.2	$	1,191.4	$	1,114.0
Identifiable Assets
Foreign	$	1,897.9	$	1,766.6	$	1,806.8
United States	4,157.5		4,090.9		3,635.6
	$	6,055.4	$	5,857.5	$	5,442.4

NOTE 22. Legal Proceedings and Other Contingencies

Various legal actions, claims, assessments and other contingencies arising in the ordinary course of business are pending against GATX and certain of its subsidiaries. These matters are subject to many uncertainties, and it is possible that some of these matters could ultimately be decided, resolved or settled adversely.

Viareggio Derailment

On June 29, 2009, a train consisting of fourteen liquefied petroleum gas (“LPG”) tank cars owned by GATX Rail Austria GmbH (an indirect subsidiary of the Company, “GATX Rail Austria”) and its subsidiaries derailed while passing through the city of Viareggio, Italy. Five tank cars overturned and one of the overturned cars was punctured by a peg or obstacle along the side of the track, resulting in a release of LPG, which subsequently ignited. Thirty-two people died and others were injured in the fire, which also resulted in property damage. The LPG tank cars were leased to FS Logistica S.p.A., a subsidiary of the Italian state-owned railway, Ferrovie dello Stato S.p.A (the “Italian Railway”). On June 28, 2012, the Public Prosecutors of Lucca (“Public Prosecutors”) formally notified GATX Rail Austria and two of its subsidiaries (collectively, “GRA”), as well as several maintenance and supervisory employees (the “Employees”), that they had concluded their investigation of the Viareggio accident and intend to charge GRA and the Employees with various negligence-based crimes related to the accident, all of which are punishable under Italian law by incarceration, damages and fines. Similar notices were issued to, among others, four Italian Railway companies and eighteen of their employees. The Public Prosecutor’s report asserts that a crack in one of the tank car’s axles broke, causing the derailment and resulting in a tank car rupture and release of LPG, after the car hit an obstacle on the side of the track placed there by the Italian Railway. The report alleges that the crack was detectable at the time of final inspection but was overlooked by the Employees at the Jungenthal Waggon GmbH workshop (a subsidiary of GATX Rail Austria). The Company believes that GRA and its Employees acted diligently and properly with respect to applicable legal and industry standards and will present numerous scientific and technical defenses to the Public Prosecutor’s report in the forthcoming proceedings. With respect to claims for personal injuries and property damages, the Company and its subsidiaries maintain insurance for such losses, and the Company’s insurers are working cooperatively with the insurer for the Italian Railway to adjust and settle these claims. These joint settlement efforts have resolved the majority of asserted civil damage claims related to the accident, and joint efforts to resolve the remaining civil claims are ongoing. In addition to settling civil claims, the Company’s insurers have been providing reimbursement for legal defense costs, including the costs of criminal defense. One of the Company’s eleven insurers notified the Company that, with respect to its layer of coverage, it will not reimburse the costs of criminal defense, and another insurer has issued a general reservation of rights with respect to coverage of criminal defense costs. The Company is engaged in insurance coverage discussions with its insurers to attempt resolution of the issue. The Company cannot predict the outcome of those discussions or the amount of criminal defense costs that ultimately may not be reimbursed by that insurer. Additionally, the Company cannot predict the outcome of the foregoing legal proceedings or what other legal proceedings, if any, may be initiated against GRA or its personnel, and, therefore, cannot reasonably estimate the amount or range of loss (including criminal defense costs) that may ultimately be incurred in connection with this accident. Accordingly, the Company has not established any accruals with respect to this matter.

Other Litigation

GATX and its subsidiaries have been named as defendants in various other legal actions and claims, governmental proceedings and private civil suits arising in the ordinary course of business, including environmental matters, workers’ compensation claims and other personal injury claims. Some of these proceedings include claims for punitive as well as compensatory damages.

Several of the Company’s subsidiaries have also been named as defendants or co-defendants in cases alleging injury caused by exposure to asbestos. The plaintiffs seek an unspecified amount of damages based on common law, statutory or premises liability or, in the case

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of ASC, the Jones Act, which provides limited remedies to certain maritime employees. As of January 31, 2013, there were 188 asbestos-related cases pending against the Company and its subsidiaries. Of the total number of pending cases, 156 are Jones Act claims, most of which were filed against ASC before the year 2000. During 2012, 12 new cases were filed, and 18 cases were dismissed without payment or otherwise settled for an immaterial amount. In addition, demand has been made against the Company for asbestos-related claims under limited indemnities given in connection with the sale of certain former subsidiaries of the Company. It is possible that the number of these cases or claims for indemnity could begin to grow and that the cost of these cases, including costs to defend, could correspondingly increase in the future.

Litigation Accruals

The Company has recorded accruals totaling $2.0 million at December 31, 2012, for losses related to those litigation matters that the Company believes to be probable and for which an amount of loss can be reasonably estimated. However, the Company cannot determine a reasonable estimate of the maximum possible loss or range of loss for these matters given that they are at various stages of the litigation process and each case is subject to the inherent uncertainties of litigation (such as the strength of the Company's legal defenses and the availability of insurance recovery). Although the maximum amount of liability that may ultimately result from any of these matters cannot be predicted with absolute certainty, management expects that none of the matters for which the Company has recorded an accrual, when ultimately resolved, will have a material adverse effect on GATX's consolidated financial position or liquidity. It is possible, however, that the ultimate resolution of one or more of these matters could have a material adverse effect on the Company's results of operations in a particular quarter or year if such resolution results in liability that materially exceeds the accrued amount.

In addition, other litigation matters are pending for which the Company has not recorded any accruals because the Company's potential liability for those matters is not probable or cannot be reasonably estimated based on currently available information. For those matters where the Company has not recorded an accrual but a loss is reasonably possible, the Company cannot determine a reasonable estimate of the maximum possible loss or range of loss for these matters given that they are at various stages of the litigation process and each case is subject to the inherent uncertainties of litigation (such as the strength of the Company's legal defenses and the availability of insurance recovery). Although the maximum amount of liability that may ultimately result from any of these matters cannot be predicted with absolute certainty, management expects that none of the matters for which the Company has not recorded an accrual, when ultimately resolved, will have a material adverse effect on GATX's consolidated financial position or liquidity. It is possible, however, that the ultimate resolution of one or more of these matters could have a material adverse effect on the Company's results of operations in a particular quarter or year if such resolution results in a significant liability for the Company.

Environmental

The Company's operations are subject to extensive federal, state and local environmental regulations. GATX's operating procedures include practices to protect the environment from the risks inherent in full service railcar leasing, which involves maintaining railcars used by customers to transport chemicals and other hazardous materials. Additionally, some of GATX's real estate holdings, including previously owned properties, are or have been used for industrial or transportation-related purposes or leased to commercial or industrial companies whose activities might have resulted in discharges on the property. As a result, GATX is subject to environmental cleanup and enforcement actions. In particular, the federal Comprehensive Environmental Response, Compensation and Liability Act (“CERCLA”), also known as the Superfund law, as well as similar state laws, impose joint and several liability for cleanup and enforcement costs on current and former owners and operators of a site without regard to fault or the legality of the original conduct. If there are other potentially responsible parties (“PRPs”), GATX generally contributes to the cleanup of these sites through cost-sharing agreements with terms that vary from site to site. Costs are typically allocated based on the relative volumetric contribution of material, the period of time the site was owned or operated, and/or the portion of the site owned or operated by each PRP.

At the time a potential environmental issue is identified, initial accruals for environmental liability are established when such liability is probable and a reasonable estimate of the associated costs can be made. Costs are estimated based on the type and level of investigation and/or remediation activities that the Company's internal environmental staff (and where appropriate, independent consultants) have determined to be necessary to comply with applicable laws and regulations. Activities include surveys and environmental studies of potentially contaminated sites as well as costs for remediation and restoration of sites determined to be contaminated. In addition, GATX has provided indemnities for potential environmental liabilities to buyers of divested companies. In these instances, accruals are based on the scope and duration of the respective indemnities together with the extent of known contamination. Estimates are periodically reviewed and adjusted as required to reflect additional information about facility or site characteristics or changes in regulatory requirements. GATX conducts a quarterly environmental contingency analysis, which considers a combination of factors including independent consulting reports, site visits, legal reviews, analysis of the likelihood of participation in and the ability of other PRPs to pay for cleanup, and historical trend analyses.

93

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

GATX is involved in administrative and judicial proceedings and other voluntary and mandatory cleanup efforts at 17 sites, including Superfund sites, at which it is contributing to the cost of performing the study or cleanup, or both, of alleged environmental contamination. As of December 31, 2012, GATX has recorded accruals of $15.6 million for remediation and restoration costs that the Company believes to be probable and for which the amount of loss can be reasonably estimated. These amounts are included in other liabilities on GATX's balance sheet. GATX's environmental liabilities are not discounted.

The Company did not materially change its methodology for identifying and calculating environmental liabilities in the last three years. Currently, no known trends, demands, commitments, events or uncertainties exist that are reasonably likely to occur and materially affect the methodology or assumptions described above.

The recorded accruals represent the Company's best estimate of all costs for remediation and restoration of affected sites, without reduction for anticipated recoveries from third parties, and include both asserted and unasserted claims. However, the Company is unable to provide a reasonable estimate of the maximum potential loss associated with these sites because cleanup costs cannot be predicted with certainty. Various factors beyond the Company's control can impact the amount of loss the Company will ultimately incur with respect to these sites, including the extent of corrective actions that may be required; evolving environmental laws and regulations; advances in environmental technology, the extent of other parties' participation in cleanup efforts; developments in periodic environmental analyses related to sites determined to be contaminated, and developments in environmental surveys and studies of potentially contaminated sites. As a result, future charges associated with these sites could have a significant effect on results of operations in a particular quarter or year if the costs materially exceed the accrued amount as individual site studies and remediation and restoration efforts proceed. However, management believes it is unlikely that the ultimate cost to GATX for any of these sites, either individually or in the aggregate, will have a material adverse effect on GATX's consolidated financial position or liquidity.

NOTE 23. Financial Data of Business Segments

The financial data presented below depicts the profitability, financial position and capital expenditures of each of GATX’s business segments.

Headquartered in Chicago, Illinois, GATX Corporation (“GATX” or the “Company”) leases, operates, manages and remarkets long-lived, widely-used assets, primarily in the rail and marine markets. GATX also invests in joint ventures that complement existing business activities. In 2012, the Company modified the composition of its reportable segments to reflect an increasing focus on international growth and related changes in its management structure. As a result, the Company now reports financial results through fourprimary business segments: Rail North America, Rail International, American Steamship Company (“ASC”) and Portfolio Management. In 2012, GATX disaggregated Rail North America from other international railcar leasing operations to better reflect GATX's increasing focus on international rail growth and recent changes to its management structure. Segment disclosures for all years are presented on this basis.

Rail North America is comprised of GATX's wholly-owned operations in the United States, Canada and Mexico, as well as two affiliate investments. Rail North America primarily provides railcars pursuant to full-service leases under which it maintains the railcars, pays ad valorem taxes and insurance and provides other ancillary services.

Rail International is comprised of GATX's wholly-owned European operations ("Rail Europe") and its newly established railcar leasing business in India ("Rail India"), as well as two affiliate investments. Rail Europe leases railcars, predominantly tank cars to customers throughout Europe pursuant to full-service leases under which it maintains the railcars and provides insurance and other ancillary services.

ASC operates the largest fleet of U.S. flagged vessels on the Great Lakes, providing waterborne transportation of dry bulk commodities such as iron ore, coal, limestone aggregates and metallurgical limestone.

Portfolio Management is an aggregation of a group of diversified owned assets and joint venture investments ("affiliates") and provides leasing, asset remarketing and asset management services. Portfolio Management selectively invests in long-lived, widely used assets with a focus on domestic marine and container related equipment and extends its market reach through affiliate investments.

Segment profit is an internal performance measure used by the Chief Executive Officer to assess the performance of each segment in a given period. Segment profit includes all revenues, pre-tax earnings from affiliates and net gains on asset dispositions that are attributable to the segments as well as expenses that management believes are directly associated with the financing, maintenance and operation of the revenue earning assets. Segment profit excludes selling, general and administrative expenses, income taxes and certain other amounts not allocated to the segments. These amounts are included in Other.

GATX allocates debt balances and related interest expense to each segment based upon a pre-determined fixed recourse leverage level

94

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

expressed as a ratio of recourse debt (including off balance sheet debt) to equity. The leverage levels for Rail North America, Rail International, ASC and Portfolio Management are set at5:1,2:1, 1.5:1 and 3:1, respectively. Management believes that by utilizing this leverage and interest expense allocation methodology, each operating segment’s financial performance reflects appropriate risk-adjusted borrowing costs.

The following tables present certain segment data for the years ended December 31, 2012, 2011 and 2010 (in millions):

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
2012 Profitability
Revenues
Lease revenue	$	713.9		$	161.2		$	4.3		$	37.6		$	—		$	917.0
Marine operating revenue	—			—			239.1			26.4			—			265.5
Other revenue	51.4			6.5			—			2.8			—			60.7
Total Revenues	765.3			167.7			243.4			66.8			—			1,243.2
Expenses
Maintenance expense	201.4			46.6			21.7			—			—			269.7
Marine operating expense	—			—			160.3			22.1			—			182.4
Depreciation	167.7			36.1			11.9			21.7			—			237.4
Operating lease expense	126.5			—			3.8			0.2			(0.3		)	130.2
Other operating expense	18.5			5.1			(0.3		)	0.9			—			24.2
Total Expenses	514.1			87.8			197.4			44.9			(0.3		)	843.9
Other Income (Expense)
Net gain on asset dispositions	58.6			1.7			—			19.2			—			79.5
Interest expense, net	(101.9		)	(24.5		)	(7.1		)	(27.7		)	(5.4		)	(166.6		)
Other (expense) income	(5.1		)	(6.1		)	(1.4		)	3.4			1.0			(8.2		)
Share of affiliates' earnings (pre-tax)	6.5			(18.3		)	—			33.4			—			21.6
Segment profit (loss)	$	209.3		$	32.7		$	37.5		$	50.2		$	(4.1	)	325.6
Selling, general and administrative expense																160.2
Income taxes (including $2.0 million related to affiliates' earnings)																28.1
Net income																$	137.3
Selected Balance Sheet Data
Investments in affiliated companies	$	46.9		$	77.2		$	—		$	377.9		$	—		$	502.0
Identifiable assets	$	3,601.1		$	1,105.8		$	284.2		$	797.4		$	266.9		$	6,055.4
Capital Expenditures
Portfolio investments and capital additions	$	465.9		$	200.1		$	12.6		$	83.5		$	7.9		$	770.0

95

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
2011 Profitability
Revenues
Lease revenue	$	690.9		$	160.5		$	4.2		$	44.5		$	—		$	900.1
Marine operating revenue	—			—			212.2			17.8			—			230.0
Other revenue	51.5			7.8			—			2.0			—			61.3
Total Revenues	742.4			168.3			216.4			64.3			—			1,191.4
Expenses
Maintenance expense	206.1			52.1			19.4			—			—			277.6
Marine operating expense	—			—			151.7			13.9			—			165.6
Depreciation	162.5			33.6			11.3			19.1			—			226.5
Operating lease expense	130.9			—			—			1.4			(0.3		)	132.0
Other operating expense	18.8			4.2			—			4.3			0.5			27.8
Total Expenses	518.3			89.9			182.4			38.7			0.2			829.5
Other Income (Expense)
Net gain on asset dispositions	52.1			—			1.1			12.6			—			65.8
Interest expense, net	(101.7		)	(25.4		)	(7.7		)	(29.6		)	(4.5		)	(168.9		)
Other (expense) income	(5.7		)	7.2			(0.1		)	2.8			(0.1		)	4.1
Share of affiliates' earnings (pre-tax)	3.9			0.5			—			36.2			—			40.6
Segment profit (loss)	$	172.7		$	60.7		$	27.3		$	47.6		$	(4.8	)	303.5
Selling, general and administrative expense																155.3
Income taxes (including $8.2 million related to affiliates' earnings)																37.4
Net income																$	110.8
Selected Balance Sheet Data
Investments in affiliated companies	$	54.0		$	88.2		$	—		$	371.6		$	—		$	513.8
Identifiable assets	$	3,540.2		$	903.2		$	276.1		$	844.0		$	294.0		$	5,857.5
Capital Expenditures
Portfolio investments and capital additions	$	280.5		$	140.8		$	17.4		$	172.0		$	3.9		$	614.6

96

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
2010 Profitability
Revenues
Lease revenue	$	671.5		$	141.8		$	4.1		$	43.0		$	—		$	860.4
Marine operating revenue	—			—			185.3			13.1			—			198.4
Other revenue	48.5			5.7			—			1.0			—			55.2
Total Revenues	720.0			147.5			189.4			57.1			—			1,114.0
Expenses
Maintenance expense	205.5			49.8			12.9			—			—			268.2
Marine operating expense	—			—			129.1			8.9			—			138.0
Depreciation	158.6			30.2			10.7			17.5			—			217.0
Operating lease expense	139.1			—			—			1.4			(0.3		)	140.2
Other operating expense	24.2			5.1			—			1.3			0.3			30.9
Total Expenses	527.4			85.1			152.7			29.1			—			794.3
Other Income (Expense)
Net gain on asset dispositions	29.6			(0.6		)	—			12.1			—			41.1
Interest expense, net	(103.8		)	(23.3		)	(8.3		)	(28.2		)	(3.5		)	(167.1		)
Other (expense) income	(5.5		)	(2.0		)	0.2			(0.1		)	7.8			0.4
Share of affiliates' earnings (pre-tax)	7.2			(6.0		)	—			36.9			—			38.1
Segment profit	$	120.1		$	30.5		$	28.6		$	48.7		$	4.3		232.2
Selling, general and administrative expense																134.8
Income taxes (including $9.6 million related to affiliates' earnings)																16.6
Net income																$	80.8
Selected Balance Sheet Data
Investments in affiliated companies	$	59.2		$	81.8		$	—		$	345.1		$	—		$	486.1
Identifiable assets	$	3,226.8		$	1,065.6		$	271.3		$	741.0		$	137.7		$	5,442.4
Capital Expenditures
Portfolio investments and capital additions	$	367.1		$	107.5		$	9.0		$	97.4		$	4.1		$	585.1

97

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

NOTE 24. Selected Quarterly Financial Data (unaudited)

	First  Quarter		(a)	Second Quarter			Third Quarter			Fourth Quarter		Total
	In millions, except per share data
2012
Total revenues	$	256.5		$	323.1		$	331.9		$	331.7	$	1,243.2
Net income	$	30.3		$	23.5	(b)	$	53.8	(c)	$	29.7	$	137.3
Per Share Data
Basic	$	0.65		$	0.50		$	1.15		$	0.63	$	2.93
Diluted	$	0.64		$	0.49		$	1.13		$	0.62	$	2.88
2011
Total revenues	$	249.4		$	296.8		$	315.2		$	330.0	$	1,191.4
Net income	$	19.9		$	26.4		$	32.9		$	31.6	$	110.8
Per Share Data
Basic	$	0.43		$	0.57		$	0.71		$	0.68	$	2.39
Diluted	$	0.42		$	0.56		$	0.70		$	0.67	$	2.35

___________________

(a) Total revenues and net income in the first quarter of each year are typically lower than the subsequent quarters due to seasonal inactivity at ASC.

(b) The decrease in income from the first quarter of 2012 was primarily due to a $12.1 million loss on the termination of a qualified hedge at GATX's AAE Cargo affiliate, partially offset by an increase in seasonal income at ASC.

(c) The increase in income from the second quarter of 2012 was primarily due to the absence of the hedge loss at AAE and the recognition of $15.5 million of tax benefits.

98

Item 9.  Changes in and Disagreements with Accountants on Accounting andFinancial Disclosure

None.

Item 9A.  Controls and Procedures

Management’s Report Regarding the Effectiveness of Disclosure Controls and Procedures

The Company’s management, with the participation of its Chief Executive Officer and Chief Financial Officer, have conducted an evaluation of the Company’s disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act of 1934 (the “Exchange Act”)). Based on such evaluation, the Company’s Chief Executive Officer and Chief Financial Officer have concluded that, as of the end of the period covered by this annual report, the Company’s disclosure controls and procedures were effective.

Management’s Report Regarding the Effectiveness of Internal Control and Procedures

The Company’s management is responsible for establishing and maintaining adequate internal control over financial reporting as defined in Rules 13a-15(f) and 15d-15(f) of the Exchange Act for the Company. The Company’s internal control over financial reporting is designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. The Company’s internal control over financial reporting includes those policies and procedures that:

(i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the Company;

(ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the Company are being made only in accordance with authorizations of management and directors of the Company; and

(iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of the Company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. In addition, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate as a result of changes in conditions, or that the degree of compliance with the applicable policies and procedures may deteriorate.

The Company’s management, with the participation of its Chief Executive Officer and Chief Financial Officer, has conducted an evaluation of the Company’s internal control over financial reporting as of the end of the period covered by this annual report based on the framework in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission. Such evaluation included reviewing the documentation of the Company’s internal controls, evaluating the design effectiveness of the internal controls and testing their operating effectiveness.

Based on such evaluation, the Company’s management has concluded that as of the end of the period covered by this annual report, the Company’s internal control over financial reporting was effective.

Ernst & Young LLP, the independent registered public accounting firm that audited the financial statements included in this annual report, has issued a report on the Company’s internal control over financial reporting. That report follows.

99

Report of Independent Registered Public Accounting Firm

The Board of Directors and Shareholders of GATX Corporation and subsidiaries

We have audited GATX Corporation and subsidiaries' internal control over financial reporting as of December 31, 2012, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (the COSO criteria). GATX Corporation and subsidiaries' management is responsible for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management's Report Regarding the Effectiveness of Internal Control and Procedures. Our responsibility is to express an opinion on the company's internal control over financial reporting based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

A company's internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company's internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of the company's assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

In our opinion, GATX Corporation and subsidiaries maintained, in all material respects, effective internal control over financial reporting as of December 31, 2012 based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheets of GATX Corporation and subsidiaries as of December 31, 2012 and 2011, and the related consolidated statements of comprehensive income, shareholders' equity and cash flows for each of the three years in the period ended December 31, 2012 of GATX Corporation and subsidiaries and our report dated February 26, 2013, expressed an unqualified opinion thereon.

/s/ Ernst & Young LLP

Ernst & Young LLP

Chicago, Illinois

February 26, 2013

100

Changes in Internal Control Over Financial Reporting

No change in the Company’s internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) occurred during the fiscal quarter ended December 31, 2012, that materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting.

Item 9B.  Other Information

None.

PART III

Item 10.  Directors, Executive Officers and Corporate Governance

Information required by this item regarding directors, the Company’s Code of Ethics, the Audit Committee Financial Expert, compliance with Section 16(a) of the Exchange Act and corporate governance is contained in sections entitled “Nominees For Election to the Board of Directors”, “Additional Information Concerning Director Nominees”, “Board of Directors”, “Board Independence”, “Committees of the Board”, “Process for Identifying and Evaluating Director Nominees”, “Communication with the Board”, “Compensation Committee Report”, “Audit Committee Report” and “Section 16(a) Beneficial Ownership Reporting Compliance” in GATX’s definitive Proxy Statement to be filed on or about March 15, 2013, which sections are incorporated herein by reference.

Information regarding executive officers is included after Item 1 in Part I of this Annual Report on Form 10-K.

Item 11.  Executive Compensation

Information required by this item regarding compensation of directors and executive officers of GATX is contained in sections entitled “Director Compensation”, “Compensation Discussion and Analysis”, “Executive Compensation Tables” and “Compensation Committee Report” in GATX’s definitive Proxy Statement to be filed on or about March 15, 2013, which sections are incorporated herein by reference.

Item 12.  Security Ownership of Certain Beneficial Owners and Managementand Related Stockholder Matters

Information required by this item regarding security ownership of certain beneficial owners and management is contained in sections entitled “Security Ownership of Management” and “Beneficial Ownership of Common Stock” in GATX’s definitive Proxy Statement to be filed on or about March 15, 2013, which sections are incorporated herein by reference.

Equity Compensation Plan Information as of December 31, 2012:

Plan Category	Number of Securities    to be Issued    Upon Exercise of    Outstanding Options,    Warrants and Rights    (a)		Weighted-Average    Exercise Price of    Outstanding Options,    Warrants and Rights    (b)		Number of Securities Remaining    Available for Future Issuance    Under Equity Compensation    Plans (Excluding Securities    Reflected in Column (a))    (c)
Equity Compensation Plans Approved by Shareholders	2,462,983	(1)	$33.82	(2)	3,451,047
Equity Compensation Plans Not Approved by Shareholders	––				––
Total	2,462,983				3,451,047

__________

(1) Consists of 1,871,526 stock options and stock appreciation rights outstanding, 189,206 performance shares, 266,990 restricted shares and 135,261 phantom stock units.

(2) The weighted-average exercise price does not include performance shares, restricted stock or phantom stock units.

See Note 11 to the consolidated financial statements for further details regarding the Company’s share-based compensation plans.

101

Item 13.  Certain Relationships and Related Transactions, and DirectorIndependence

Information required by this item regarding transactions with related persons and director independence is contained in the sections entitled “Related Person Transactions” and “Board Independence” in GATX’s definitive Proxy Statement to be filed on or about March 15, 2013, which sections are incorporated herein by reference.

Item 14.  Principal Accountant Fees and Services

Information required by this item regarding fees paid to Ernst & Young is contained in sections entitled “Audit Fees”, “Audit Related Fees”, “Tax Fees”, “All Other Fees” and “Pre-Approval Policy” in GATX’s definitive Proxy Statement to be filed on or about March 15, 2013, which sections are incorporated herein by reference.

PART IV

Item 15.  Exhibits and Financial Statement Schedules

(a) 1.  Financial Statements

	Page
Documents Filed as Part of this Report:
Report of Independent Registered Public Accounting Firm with respect to the consolidated financial statements	55
Consolidated Balance Sheets — December 31, 2012 and 2011	56
Consolidated Statements of Comprehensive Income — Years Ended December 31, 2012, 2011, and 2010	57
Consolidated Statements of Cash Flows — Years Ended December 31, 2012, 2011, and 2010	58
Consolidated Statements of Changes in Shareholders’ Equity — Years Ended December 31, 2012, 2011 and 2010	59
Notes to Consolidated Financial Statements	60
Report of Independent Registered Public Accounting Firm with respect to internal controls over financial reporting	100

2. Financial Statement Schedules:

Schedule I Condensed Financial Information of Registrant 104

All other schedules for which provision is made in the applicable accounting regulations of the Securities and Exchange Commission are not required under the related instructions or are inapplicable, and, therefore, have been omitted.

3. Exhibits. See the Exhibit Index included herewith and incorporated by reference hereto.

102

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

GATX CORPORATION

(Registrant)

/s/  BRIAN A. KENNEY    

Brian A. Kenney

Chairman, President and

Chief Executive Officer

February 26, 2013

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed by the following persons on behalf of the registrant and in the capacities and on the date indicated.

/s/  BRIAN A. KENNEY	Chairman, President and Chief Executive Officer (Principal Executive Officer)
Brian A. Kenney
February 26, 2013
/s/  ROBERT C. LYONS	Executive Vice President and Chief Financial Officer (Principal Financial Officer)
Robert C. Lyons
February 26, 2013
/s/ WILLIAM M. MUCKIAN	Senior Vice President, Controller and Chief Accounting Officer (Principal Accounting Officer)
William M. Muckian
February 26, 2013
Anne L. Arvia	Director
Ernst A. Häberli	Director
Mark G. McGrath	Director
James B. Ream	Director
Robert J. Ritchie	Director
David S. Sutherland	Director
Casey J. Sylla	Director
Paul G. Yovovich	Director
By /s/ DEBORAH A. GOLDEN	Executive Vice President, General Counsel and Corporate Secretary (Attorney in Fact)
Deborah A. Golden
February 26, 2013

103

SCHEDULE I — CONDENSED FINANCIAL INFORMATION OF REGISTRANT

GATX CORPORATION

(Parent Company)

BALANCE SHEETS

(In millions)

	December 31
	2012	2011
Assets
Cash and cash equivalents	183.5	208.4
Operating assets and facilities, net	2,501.7	2,355.9
Investments in affiliated companies	2,043.8	2,010.9
Other assets	440.0	478.1
Total Assets	5,169.0	5,053.3
Liabilities and Shareholders’ Equity
Accounts payable and accrued expenses	105.0	56.1
Debt	2,761.1	2,986.6
Other liabilities	1,058.7	883.3
Total Liabilities	3,924.8	3,926.0
Total Shareholders’ Equity	1,244.2	1,127.3
Total Liabilities and Shareholders’ Equity	5,169.0	5,053.3

The accompanying note is an integral part of these financial statements.

104

SCHEDULE I — CONDENSED FINANCIAL INFORMATION OF REGISTRANT (CONT’D)

GATX CORPORATION

(Parent Company)

STATEMENTS OF COMPREHENSIVE INCOME

(In millions)

	Year Ended December 31
	2012			2011			2010
Revenues
Lease revenue	$	504.5		$	477.7		$	458.9
Other revenue	43.5			44.4			41.0
Total Revenues	548.0			522.1			499.9
Expenses
Maintenance expense	154.8			163.9			168.7
Depreciation	122.2			117.0			110.2
Operating lease expense	91.6			95.2			101.3
Other operating expense	12.0			11.5			20.2
Selling, general and administrative expense	118.4			113.3			97.2
Total Expenses	499.0			500.9			497.6
Other Income (Expense)
Net gain on asset dispositions	59.4			44.0			27.0
Interest expense, net	(65.4		)	(72.8		)	(74.0		)
Other (expense) income	(4.4		)	(2.4		)	3.7
Income (loss) before Income Taxes and Share of Affiliates' Earnings	38.6			(10.0		)	(41.0		)
Income tax benefit	1.0			4.8			20.8
Share of affiliates' earnings (net of tax)	97.7			116.0			101.0
Net Income	$	137.3		$	110.8		$	80.8
Other Comprehensive Income, net of taxes
Foreign currency translation adjustments	25.0			(39.6		)	(28.4		)
Unrealized gain (loss) on securities	0.2			(0.2		)	1.3
Unrealized gain (loss) on derivative instruments	11.7			(0.5		)	(3.5		)
Post-retirement benefit plans	(12.4		)	(18.8		)	5.1
Other comprehensive income (loss)	24.5			(59.1		)	(25.5		)
Comprehensive Income	$	161.8		$	51.7		$	55.3

The accompanying note is an integral part of these financial statements.

105

SCHEDULE I — CONDENSED FINANCIAL INFORMATION OF REGISTRANT (CONT’D)

GATX CORPORATION

(Parent Company)

STATEMENTS OF CASH FLOWS

(In millions)

	Year Ended December 31
	2012			2011			2010
Operating Activities
Net cash provided by operating activities	$	269.6		$	95.0		$	92.8
Investing Activities
Capital additions	(444.6		)	(343.1		)	(417.1		)
Proceeds from sale-leasebacks	104.9			—			79.0
Portfolio proceeds and other	136.6			143.0			65.4
Purchases of leased-in assets	(1.4		)	(61.1		)	(5.3		)
Capital contributions to affiliates, net	—			(25.7		)	—
Net cash used in investing activities	(204.5		)	(286.9		)	(278.0		)
Financing Activities
Repayments of debt (original maturities longer than 90 days)	(603.7		)	(195.9		)	(286.3		)
Net increase (decrease) in debt with original maturities of 90 days or less	185.0			(89.1		)	58.6
Proceeds from issuances of debt (original maturities longer than 90 days)	381.4			701.0			493.5
Dividends	(57.7		)	(56.0		)	(53.5		)
Other	5.0			(8.6		)	(6.3		)
Net cash (used in) provided by financing activities	(90.0		)	351.4			206.0
Net (decrease) increase in cash and cash equivalents during the period	(24.9		)	159.5			20.8
Cash and Cash Equivalents at beginning of period	208.4			48.9			28.1
Cash and Cash Equivalents at end of period	$	183.5		$	208.4		$	48.9
Total Distributions from Affiliates	$	101.0		$	—		$	57.3

The accompanying note is an integral part of these financial statements.

106

Note to Condensed Financial Statements

Basis of Presentation

The condensed financial statements represent the Balance Sheets, Statements of Comprehensive Income and Cash Flows of GATX Corporation (“GATX” or the “Company”), the parent company. In these parent company financial statements, GATX’s investment in subsidiaries and joint ventures (collectively "Affiliates") is stated at cost plus equity in undistributed earnings since the date of acquisition. The Company’s share of net income from Affiliates is recorded using the equity method. GATX’s parent company financial statements should be read in conjunction with its consolidated financial statements.

107

EXHIBIT INDEX

Exhibit Number	Exhibit Description
Filed with this Report:
10.24	Form of Stock-Settled Stock Appreciation Right (SAR) Agreement for awards under the GATX Corporation 2012 Incentive Award Plan to executive officers with Agreements for Employment Following A Change of Control.*
10.25	Form of Performance Share Agreement for grants under the GATX Corporation 2012 Incentive Award Plan to executive officers with Agreements for Employment Following a Change of Control.*
12	Statement regarding computation of ratios of earnings to combined fixed charges and preferred stock dividends.
21	Subsidiaries of the Registrant.
23	Consent of Ernst & Young LLP, Independent Registered Public Accounting Firm.
24	Powers of Attorney with respect to the Annual Report on Form 10-K for the fiscal year ended December 31, 2012.
31.1	Certification Pursuant to Exchange Act Rule 13a-14(a) and Rule 15d-14(a) (CEO Certification).
31.2	Certification Pursuant to Exchange Act Rule 13a-14(a) and Rule 15d-14(a) (CFO Certification).
32	Certification Pursuant to 18 U.S.C. Section 1350 (CEO and CFO Certification).
101	The following materials from GATX Corporation’s Annual Report on Form 10-K for the year ended December 31, 2012, are formatted in XBRL (eXtensible Business Reporting Language): (i) Consolidated Balance Sheets at December 31, 2012 and December 31, 2011, (ii) Consolidated Statements of Income for the years ended December 31, 2012, 2011 and 2010, (iii) Consolidated Statements of Cash Flows for the years ended December 31, 2012, 2011 and 2010, (iv) Notes to the Consolidated Financial Statements, and (v) Schedule I Condensed Financial Information of Registrant.
Incorporated by Reference:
3.1	Restated Certificate of Incorporation of GATX Corporation is incorporated herein by reference to Exhibit 3.3 to GATX’s Form 8-K dated December 12, 2008, file number 1-2328.
3.2	Amended and Restated By-Laws of GATX Corporation are incorporated herein by reference to Exhibit 3.1 of GATX’s Form 8-K dated July 26, 2011, file number 1-2328.
4.1	Indenture dated as of November 1, 2003 between GATX Financial Corporation and JP Morgan Chase Bank is incorporated herein by reference to Exhibit 4Q to GATX Financial Corporation’s Annual Report on Form 10-K for the fiscal year ended December 31, 2003, file number 1-8319.
4.2	Indenture dated as of February 6, 2008, between GATX Corporation and U.S. Bank National Association, as Trustee, is incorporated herein by reference to Exhibit 4.12 to GATX’s Annual Report on Form 10-K for the fiscal year ended December 31, 2007, file number 1-2328.
4.3	Indenture dated as of November 6, 2008, between GATX Corporation and U.S. Bank National Association, as Trustee, is incorporated herein by reference to Exhibit 4.2 to GATX’s Form 8-K dated November 3, 2008, file number 1-2328.
10.1	Four Year Credit Agreement with Citigroup Global Markets Inc. and Merrill Lynch, Pierce, Fenner & Smith Incorporated, as joint lead arrangers and joint book managers, Bank of America, N.A., as syndication agent, PNC Bank National Association, U.S. Bank National Association and Bayerische Landesbank, acting through its New York branch, as co-documentation agents, Citibank, N.A., as administrative agent, and the lenders party thereto is incorporated herein by reference to GATX’s Form 8-K dated May 11, 2011, file number 1-8319.
10.2	Supply Agreement by and between GATX Corporation, as Buyer, and Trinity Rail Group, LLC, as Seller, date March 14, 2011 is incorporated by reference to GATX’s Quarterly Report on Form 10-Q for the fiscal quarter ended March 31, 2011, file number 1-2328 (Note: Portions of this document have been omitted pursuant to a Request for Confidential Treatment filed with the Securities and Exchange Commission on April 27, 2011). i. First Amendment to Supply Agreement by and between GATX Corporation, as Buyer, and Trinity Rail Group, LLC, as Seller, dated April 25, 2011 is incorporated by reference to GATX’s Quarterly Report on Form 10-Q for the fiscal quarter ended March 31, 2011, file number 1-2328.
10.3	GATX Corporation 1995 Long-Term Incentive Compensation Plan (as amended and restated) is incorporated herein by reference to the Appendix to the Definitive Proxy Statement filed on March 17, 1999 in connection with GATX’s 1999 Annual Meeting of Shareholders, file number 1-2328.*

108

	i. Fourth Amendment of said Plan effective June 9, 2000, and Fifth Amendment of said Plan effective January 26, 2001, are incorporated herein by reference to Exhibit 10B to GATX’s Annual Report on Form 10-K for the fiscal year ended December 31, 2000, file number 1-2328.*
	ii. Sixth Amendment of said Plan effective as of July 27, 2001 is incorporated herein by reference to Exhibit 10B to GATX’s Quarterly Report on Form 10-Q for the fiscal quarter ended September 30, 2001, file number 1-2328.*
	iii. Amendment of said Plan effective as of December 7, 2007, is incorporated herein by reference to Exhibit 10.28 to GATX’s Annual Report on Form 10-K for the fiscal year ended December 31, 2007, file number 1-2328.* iv. Seventh Amendment of GATX Corporation 1995 Long-Term Incentive Compensation Plan effective October 22, 2010.*
10.4	Summary of the GATX Corporation Directors’ Deferred Stock Plan approved on July 26, 1996, effective as of April 26, 1996, is incorporated herein by reference to Exhibit 10 to GATX’s Quarterly Report on Form 10-Q for the quarterly period ended September 30, 1996, file number 1-2328.
10.5	GATX Corporation Directors’ Phantom Stock Plan, effective as of December 7, 2007, is incorporated herein by reference to Exhibit 10.31 to GATX’s Annual Report on Form 10-K for the fiscal year ended December 31, 2007, file number 1-2328.
10.6	Amended and Restated GATX Corporation Directors’ Voluntary Deferred Fee Plan, effective as of December 7, 2007, is incorporated herein by reference to Exhibit 10.32 to GATX’s Annual Report on Form 10-K for the fiscal year ended December 31, 2007, file number 1-2328.*
10.7	Summary of GATX Corporation Non-Employee Directors’ Compensation is incorporated herein by reference to the section entitled “Director Compensation” in GATX’s Definitive Proxy Statement filed on March 11, 2011, in connection with GATX’s 2011 Annual Meeting of Shareholders, file number 1-2328.*
10.8	GATX Corporation 2004 Equity Incentive Compensation Plan is incorporated herein by reference to Exhibit C to the Definitive Proxy Statement filed on March 18, 2004 in connection with GATX’s 2004 Annual Meeting of Shareholders, file number 1-2328.*
	i. Amendment of said Plan, effective as of December 7, 2007, is incorporated herein by reference to Exhibit 10.28 to GATX’s Annual Report on Form 10-K for the fiscal year ended December 31, 2007, file number 1-2328.*
	ii. Second Amendment of GATX Corporation 2004 Equity Incentive Compensation Plan effective October 22, 2010.*
10.9	Restricted Stock Unit Agreement for awards made to executive officers on February 25, 2011, under the 2004 Equity Incentive Compensation Plan is incorporated herein by reference to Exhibit 10.1(a) to GATX’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2011, file number 1-2328.*
10.10	Non Qualified Stock Option Agreement for awards made under the 2004 Equity Incentive Compensation Plan is incorporated herein by reference to Exhibit 10F to GATX’s Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2004, file number 1-2328.*
10.11	GATX Corporation 2004 Equity Incentive Compensation Plan Stock-Settled Stock Appreciation Right (SSAR) Agreement between GATX Corporation and certain executive officers entered into as of March 10, 2006 is incorporated herein by reference to Exhibit 10.1 to GATX’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2006, file number 1-2328.*
10.12	GATX Corporation 2004 Equity Incentive Compensation Plan Stock-Settled Appreciation Right (SAR) Agreement between GATX Corporation and certain eligible grantees entered into as of March 8, 2007, incorporated by reference to Exhibit 10.1 to GATX’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2007.*
10.13	Form of GATX Corporation Stock-Settled Stock Appreciation Right (SAR) Agreement for grants under the 2004 Equity Incentive Compensation Plan to executive officers on or after January 1, 2009, incorporated herein by reference to Exhibit 10.2 to GATX’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2009, file number 1-2328.*
10.14	Form of GATX Corporation Performance Share Agreement for grants under the 2004 Equity Incentive Compensation Plan to executive officers on for after January 1, 2009, incorporated herein by reference to Exhibit 10.3 to GATX’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2009, file number 1-2328.*

109

10.15	Form of GATX Corporation Restricted Common Stock Agreement for grants under the 2004 Equity Incentive Compensation Plan to executive officers on or after January 1, 2009, incorporated herein by reference to Exhibit 10.4 to GATX’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2009, file number 1-2328.*
10.16	GATX Corporation 2012 Incentive Award Plan is incorporated herein by reference to Exhibit A to the Definitive Proxy Statement filed on March 11, 2012 in connection with GATX's 2012 Annual Meeting of Shareholders, file number 1-2328.*
10.17	GATX Corporation Cash Incentive Compensation Plan is incorporated herein by reference to Exhibit D to the Definitive Proxy Statement filed on March 18, 2004 in connection with GATX’s 2004 Annual Meeting of Shareholders, file number 1-2328.*
	i. Amendment of said Plan, effective as of December 7, 2007, is incorporated herein by reference to Exhibit 10.30 to GATX’s Annual Report on Form 10-K for the fiscal year ended December 31, 2007, file number 1-2328.*
10.18	Form of Amended and Restated Agreement for Employment Following a Change of Control dated as of January 1, 2009, between GATX Corporation and Brian A. Kenney is incorporated herein by reference to Exhibit 10.27 to GATX’s Annual Report on Form 10-K for the fiscal year ended December 31, 2008, file number 1-2328.*
10.19	Form of Amended and Restated Agreement for Employment Following a Change of Control dated as of January 1, 2009, between GATX Corporation and Robert C. Lyons, James F. Earl, Deborah A. Golden, Mary K. Lawler, William M. Muckian, William J. Hasek, Michael T. Brooks, Curt F. Glenn and Clifford J. Porzenheim is incorporated herein by reference to Exhibit 10.28 to GATX’s Annual Report on Form 10-K for the fiscal year ended December 31, 2008, file number 1-2328.*
10.20	Form of Agreement for Employment Following a Change of Control dated as of January 26, 2012, between GATX Corporation and Thomas A. Ellman is incorporated herein by reference to Exhibit 10.1 to GATX's Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2012, file number 1-2328.*
10.21	Form of GATX Corporation Indemnification Agreement for directors as of February 23, 2009, is incorporated herein by reference to Exhibit 10.1 to GATX’s Form 8-K dated February 24, 2009, file number 1-2328.
10.22	Form of GATX Corporation Stock-Settled Appreciation Right (SAR) Agreement for grants to executive officers on or after January 1, 2008, is incorporated herein by reference to Exhibit 10.23 to GATX’s Annual Report on Form 10-K for the fiscal year ended December 31, 2009, file number 1-2328.*
10.23	Form of GATX Corporation Performance Share Agreement for grants to executive officers on or after January 1, 2008, is incorporated herein by reference to Exhibit 10.24 to GATX’s Annual Report on Form 10-K for the fiscal year ended December 31, 2009, file number 1-2328.*
99.1	Undertakings to the GATX Corporation Salaried Employees’ Retirement Savings Plan is incorporated herein by reference to GATX’s Annual Report on Form 10-K for the fiscal year ended December 31, 1982, file number 1-2328.*
99.2	Certain instruments evidencing long-term indebtedness of GATX Corporation are not being filed as exhibits to this Report because the total amount of securities authorized under any such instrument does not exceed 10% of GATX Corporation’s total assets. GATX Corporation will furnish copies of any such instruments upon request of the Securities and Exchange Commission.

__________

(*) Compensatory Plans or Arrangements

110

EX-10.24

Exhibit 10.24

GATX CORPORATION

2012 INCENTIVE AWARD PLAN

STOCK-SETTLED STOCK APPRECIATION RIGHT (SAR) AGREEMENT

In partial consideration of the provision of services by the Participant, an employee of GATX Corporation (the "Company"), or a subsidiary thereof (such subsidiary and the Company hereinafter collectively "GATX"), and as further incentive for the Participant to advance the interests of the Company, the Company hereby grants to the Participant, on the Grant Date, the number of stock-settled stock appreciation rights set forth on the MSSB Benefit Access website (https://www.benefitaccess.com) (the "SARs") with respect to the same number of Shares of the Company at the Exercise Price set forth on the MSSB Benefit Access website pursuant to the GATX Corporation 2012 Incentive Award Plan (the “Plan”). Such grant is expressly subject to the terms and conditions of this Stock Appreciation Rights Agreement (the “Agreement”) as hereinafter set forth and further subject to the terms and conditions of the Plan, both of which are incorporated herein by reference.

1. Defined Terms. Capitalized terms used in this Agreement are defined in paragraph 15 or elsewhere herein. Capitalized terms used but not defined herein shall have the meanings ascribed thereto in the Plan.

2. Award. By acceptance of this SAR award on the MSSB Benefit Access website (https://www.benefitaccess.com), Participant hereby agrees and consents to the application this Agreement and the Plan to the SARs. Each SAR entitles the Participant to receive one Share subject to the terms and conditions of this Agreement.

3. Vesting and Exercise Schedule. Subject to the terms and conditions of this Agreement, the SARs shall vest and become exercisable in installments according to the following schedule, provided the Participant has not had a Termination of Service prior thereto:

INSTALLMENT	VESTING DATE
33.33% of SARs	One-year anniversary of the Grant Date
33.33% of SARs	Two-year anniversary of the Grant Date
33.34% of SARs	Three-year anniversary of the Grant Date

4. Accelerated Vesting. Notwithstanding paragraph 3 of this Agreement, the Participant shall vest in each SAR granted hereunder and such SARs shall be exercisable as follows:

(a) Each SAR shall become fully vested if a Participant's Date of Termination occurs by reason of the Participant's death, Disability or Retirement at or beyond age 65.

(b) Only SARs which were vested and exercisable on or immediately prior to the Participant's Date of Termination may be exercised on or after the Participant's Date of Termination. However, if the Participant is terminated for Cause, all unexercised SARs (whether or not previously vested) will be cancelled as of the date immediately prior to the Participant's Date of Termination.

(c) Subject to the provisions of Section 14.2 of the Plan (relating to the adjustment of shares), if a Change in Control occurs prior to a Participant's Date of Termination, and within two (2) years after the occurrence of the Change in Control the Participant's Date of Termination occurs by reason of discharge by the employer without Cause or the Participant resigns from employment with the employer for Good Reason, the Participant shall, except as provided in subparagraph 4(d) below, become vested in all unvested, outstanding SARs that were granted prior to the Change in Control and that are held by the Participant as of the Date of Termination.

(d) If a Date of Termination occurs as described in subparagraph 4(c) above in connection with a Change in Control described in Subsection 2.7(e) of the Plan with respect to a Participant as described therein (relating to certain transactions involving a Subsidiary or Business Segment), (A) the SARs, if any, scheduled to become vested and exercisable during the calendar year in which such Date of Termination occurs shall vest and become exercisable in full beginning on the date on which the Date of Termination occurs and (B) all

1

vested and exercisable SARs will remain exercisable until the earlier of the Expiration Date or the last business day of the calendar year following the calendar year in which the Change in Control occurs.

(e) For purposes of this paragraph 4, if, as a result of Change in Control described in Subsection 2.7(e) of the Plan, the Participant's Termination of Service occurs by reason of the Participant's employer ceasing to be a Subsidiary (and the Participant's employer is or becomes an entity that is separate from the Company), and the Participant is not, immediately following the Change in Control, employed by the Company or an entity that is then a Subsidiary, then the occurrence of the Change in Control shall be treated as the Participant being discharged by the employer without Cause.

5. Expiration. The SARs shall not be exercisable after the Company's close of business on the last business day that occurs immediately prior to the Expiration Date. The "Expiration Date" shall be the earliest to occur of:

(a)    the seven-year anniversary of the Grant Date;

(b) if the Date of Termination occurs by reason of death or Disability, the one-year anniversary of such Date of Termination;

(c) if the Date of Termination occurs for Cause, the date immediately preceding Date of Termination;

(d) if the Date of Termination occurs by reason of Retirement, the five-year anniversary of such Date of Termination; and;

(e) if the Date of Termination occurs for any reason other than those listed in subparagraph (b), (c), or (d) of this paragraph 5, the three-month anniversary of such Date of Termination.

6. Method of SAR Exercise; Number of Shares, Sale of Shares. The SARs subject to this grant may be exercised once vested in whole or in part according to such procedures as the Administrator may establish in its sole discretion from time to time.

SARs covered by this Agreement shall be settled in Shares. The number of Shares to be issued to a Participant upon exercise of an SAR shall be equal to the product of (a) the difference between (i) the Fair Market Value of the Shares on the Exercise Date, and (ii) the Exercise Price, and (b) the number of SARs exercised, divided by the Fair Market Value of the Shares on the Exercise Date. Any fractional share shall be paid in cash.

7. Dividend Equivalents. Participants shall be entitled to accrue dividend equivalents beginning on the Grant Date and ending upon the earlier to occur of (i) the Exercise Date of the SARs and (ii) the Expiration Date. An account will be established for each participant that will accrue dividend equivalents on the SARs with respect to Shares that have not vested. The Participant's account shall be credited with dividend equivalents equal to the product of (a) the number of SARs which the Participant was granted and that have not vested subject to any adjustment made by the Committee as referred to in Section 14.2 of the Plan, and (b) the dividend declared on a single Share with respect to the immediately preceding dividend record date. So long as the SARs have not been cancelled, accrued dividends will be paid as soon as practical after the Vesting Date of the SARs to which such dividend equivalents related as reflected in paragraph 3 of this Agreement. Dividend equivalents with respect to vested, unexercised SARs will be calculated as described above, and will be paid within 30 days of each quarterly dividend payment date. Dividend equivalents on vested SARs will be prorated through the Expiration Date or Exercise Date, as applicable, for the quarter in which such Expiration Date or Exercise Date occurs.

8. Withholding. All deliveries and distributions under this Agreement are subject to withholding of all applicable taxes. At the election of the Participant, and subject to such rules and limitations as may be established by the Administrator from time to time, such withholding obligations may be satisfied through the surrender of Shares which the Participant already owns, or to which the Participant is otherwise entitled under the Plan; provided, however, that, except as otherwise provided by the Committee, such Shares may be used to satisfy not more than the Company's minimum statutory withholding obligation (based on minimum statutory withholding rates for Federal and state tax purposes, including payroll taxes, that are applicable to such supplemental taxable income). In the event that the withholding obligation arises during a period in which the Participant is prohibited from trading in the Shares pursuant to the Company's insider trading policy, or otherwise by applicable law, then unless otherwise elected by the Participant during a period when he/she was not so restricted from trading, the Company shall automatically satisfy the Participant's withholding obligation by withholding from Shares otherwise deliverable under this Agreement.

2

9. Transferability. Except as provided in a domestic relations order, the SARs are not transferable other than as designated by the Participant by will or by the laws of descent and distribution, and during the Participant's life, may be exercised only by the Participant or, in the case of his or her incapacity, by his or her legal representative.

10. Heirs and Successors. This Agreement shall be binding upon and inure to the benefit of the Company and its successors and assigns, and upon any person acquiring, whether by merger, consolidation, purchase of assets or otherwise, all or substantially all of the Company's assets and business. If any rights exercisable by the Participant or benefits deliverable to the Participant under this Agreement have not been exercised or delivered, respectively, at the time of the Participant's death, such rights shall be exercisable by the Designated Beneficiary, and such benefits shall be delivered to the Designated Beneficiary, in accordance with the provisions of this Agreement and the Plan. If a deceased Participant fails to designate a beneficiary, or if the Designated Beneficiary does not survive the Participant, any rights that would have been exercisable by the Participant and any benefits distributable to the Participant shall be exercised by or distributed to the legal representative of the estate of the Participant. If a deceased Participant designates a beneficiary and the Designated Beneficiary survives the Participant but dies before the Designated Beneficiary's exercise of all rights under this Agreement or before the complete distribution of benefits to the Designated Beneficiary under this Agreement, then any rights that would have been exercisable by the Designated Beneficiary shall be exercised by the legal representative of the estate of the Designated Beneficiary, and any benefits distributable to the Designated Beneficiary shall be distributed to the legal representative of the estate of the Designated Beneficiary.

11. Plan Governs. Notwithstanding anything in this Agreement to the contrary, the terms of this Agreement shall be subject to the terms of the Plan, a copy of which may be obtained by the Participant from the Director, Compensation of the Company. This Agreement is subject to all interpretations, amendments, rules and regulations promulgated by the Administrator from time to time pursuant to the Plan.

12. Not An Employment Contract. The grant of SARs will not confer on the Participant any right with respect to continuance of employment or other service with the Company or any subsidiary, nor will the SAR interfere in any way with any right the Company or any subsidiary would otherwise have to terminate or modify the terms of such Participant's employment or other service at any time.

13. Notices. Any written notices required to be provided to the Company, shall be addressed as follows:

GATX Corporation

222 West Adams Street

Chicago, IL 60606-5314

(a) Any notice provided to the Company pursuant to the definition of Good Reason must be delivered by hand or by registered or certified mail, return receipt requested, postage prepaid, addressed to the Senior Vice President, Human Resources and shall only be effective when actually received.

(b) All other notices shall be in writing and shall be deemed sufficiently given if either hand delivered or if sent by fax or overnight courier, or by postage paid first class mail. Any such notice sent by mail shall be deemed received three days after mailing, but in no event later than the date of actual receipt and shall be directed, if to the Participant, at the Participant's address indicated by the Company's records, or if to the Company, to the attention of the Director, Compensation.

14. No Rights As Shareholder. The Participant shall not have any rights of a shareholder with respect to the Shares subject to the granted SARs, unless and until the SAR has been exercise and a stock certificate has been duly issued as provided herein.

15. Definitions. For purposes of this Agreement, the terms used in this Agreement shall be subject to the following:

“Cause” means (i) the willful and continued failure of the Participant to perform the Participant's duties for GATX (other than any such failure resulting from incapacity due to physical or mental illness), or (ii) the willful engaging by the Participant in illegal conduct or gross misconduct which is materially and demonstrably injurious to GATX. For purposes of this provision, no act or failure to act, on the part of the Participant, shall be considered "willful" unless it is done, or omitted to be done, by the Participant in bad faith or without reasonable belief, that the Participant's action or omission was in the best interests of GATX.

“Date of Termination” means the date on which the Participant incurs a Termination of Service.

3

Designated Beneficiary means the beneficiary or beneficiaries designated by the Participant in a writing filed with the Committee in such form and at such time as the Committee shall require.

“Disability” means, except as otherwise provided by the Committee, that the Participant is considered to have a "Disability" for such period of time that the Participant is considered to be "disabled" (as such term is defined in the Company's long term disability plan).

“Exercise Date” means the date the SAR is exercised by the Participant by logging into the MSSB Benefit Access website (https://www.benefitaccess.com) or contacting a MSSB customer service representative before 3 PM eastern time and indicating the number of SARs to be so exercised.

“Good Reason” means the occurrence of one or more of the following conditions without the consent of the Participant:

(i) a material diminution in the Participant's base compensation, compared with the Participant's base compensation in effect immediately prior to the consummation of a Change in Control;

(ii) a material diminution in the Participant's authority, duties, or responsibilities, compared with the authority, duties, and responsibilities of the Participant immediately prior to the consummation of a Change in Control; or

(iii) a material change in the geographic location at which the Participant must perform services.

The Participant must provide written notice to the Company of the occurrence of Good Reason within 90 days after the event constituting Good Reason, which notice specifically identifies the circumstances which the Participant believes constitute Good Reason. The Company will have 30 days after it receives the notice to correct the circumstances or give notice to the Participant that it does not intend to correct. The Participant may resign within a reasonable time after receiving the Company's response or after the Company fails to correct such circumstances (provided that in no event may such termination occur more than one year after the initial existence of the condition constituting Good Reason).

“Grant Date” means the later of either the date the grant was approved by the Committee or the last trading day of the month following the month in which the Participant was hired.

“Retirement” means the retirement of the Participant on a "Retirement Date" (as such term is defined in the GATX Corporation Non-Contributory Pension Plan for Salaried Employees).

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EX-10.25

Exhibit 10.25

GATX CORPORATION

2012 INCENTIVE AWARD PLAN

PERFORMANCE SHARE AGREEMENT

FOR EXECUTIVE OFFICERS

This PERFORMANCE SHARE AGREEMENT (this “Agreement”) is entered into as of January 24, 2013 (the “Grant Date”) by and between the Participant and GATX Corporation (the "Company") in respect of the performance period beginning on January 1, 2013 through and including December 31, 2015 (the “Performance Period”).

WHEREAS, the Company maintains the GATX Corporation 2012 Incentive Award Plan (the "Plan"), which is incorporated into and forms a part of this Agreement, and the Participant has been selected by the Compensation Committee of the Board of Directors of the Company (the “Committee”), which has been charged with the responsibility of administering the Plan, to receive a grant of Performance Shares under the Plan;

NOW, THEREFORE, IT IS AGREED, by and between the Company and the Participant as follows:

1. Defined Terms. Certain capitalized terms used in this Agreement are defined in paragraph 13 or elsewhere in this Agreement. Capitalized terms used but not defined herein shall have the meanings ascribed thereto in the Plan.

2. Award. Subject to the terms of the Plan and this Agreement, the Participant is hereby granted the number of Performance Shares approved by the Committee, subject to Section 3.1 and Article 5 of the Plan and as set forth on the Benefits Access website (https://www.benefitaccess.com) of Morgan Stanley Smith Barney (“MSSB”) or any successor administrator the Committee may designate from time to time to administer the Plan and this Agreement. Each Performance Share entitles the Participant to receive one share of Common Stock of the Company (each a “Share”) subject to the terms and conditions of this Agreement.

3. Voting Rights and Dividends. Notwithstanding anything to the contrary, the Participant shall not have any rights as a shareholder of the Company, including the right to vote, until the Participant actually receives Shares in accordance with paragraph 4 of this Agreement.

An account shall be established for the Participant, to which shall be credited dividend equivalents equal to the product of (a) the number of the Participant’s Performance Shares and (b) the dividend declared on a single share of Common Stock. To the extent the participant becomes vested in Performance Shares, the Participant shall be entitled to a distribution of the dividend equivalents credited to his or her account if and when Shares are issued with respect to Performance Shares to which the Participant becomes entitled pursuant to paragraph 4 of this Agreement. All dividend equivalents paid will be considered ordinary income and will be subject to supplemental withholding rates for income tax purposes including payroll taxes, applicable to such supplemental income.

4. Vesting, Transfer and Forfeiture.

(a) Subject to the terms hereof, if the Company’s Total Gross Income Less Total Ownership Costs for each of the three years during the Performance Period (as reported on the Company’s audited income statement for each such year) is greater than $500,000,000 (the “Threshold Goal”) and the Committee certifies that the Threshold Goal has been achieved, the Participant shall be entitled to the number of Shares set forth in the 2012 resolutions of the Committee providing for the grant of this Performance Share award (the "Unadjusted Award Amount"). However, if the Threshold Goal for the Performance Period is not achieved and certified by the Committee, the Unadjusted Award Amount shall be zero.

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(b) After the end of the Performance Period, the Committee shall determine the number of the Participant's Performance Shares that have been earned for the Performance Period in accordance with the schedule set forth on Exhibit 1, weighted by the percentages set forth in the column captioned “Weight” on Exhibit 2 and calculated in the manner set forth on Exhibit 2 (provided that the determination under this subparagraph 4(b) shall be subject to modification as provided in paragraph 8 hereof). The Unadjusted Award Amount shall be reduced to the number of Performance Shares determined to be earned in accordance with the foregoing provisions of this subparagraph 4(b), and any unearned portion of the Unadjusted Award Amount or Performance Shares shall be forfeited. In no event shall the Performance Shares earned by the Participant exceed the Unadjusted Award Amount.

(c) As soon as practicable after the Committee determines the number of the earned Performance Shares pursuant to subparagraphs 4(a) and 4(b) above, but not later than March 15 of the year following the end of the Performance Period, an equal number of Shares shall be transferred to the Participant.

(d) Except as provided in subparagraph 4(e) below, if the Participant's Date of Termination occurs prior to the end of the Performance Period, the Participant shall forfeit all Performance Shares and rights under this Agreement.

(e) Notwithstanding subparagraph 4(d) above, the Participant shall become vested in a number of earned Performance Shares hereunder, and shall become owner of an equal number of Shares in respect thereof, free and clear of all restrictions otherwise imposed by this Agreement, as follows:

(i) If the Participant’s employment is involuntarily terminated by the Company other than for Cause, not less than eighteen (18) months following the beginning of the Performance Period but on or prior to the end of the Performance Period, the Participant will be entitled to a pro rata portion of his or her earned Performance Shares based on the length of his or her employment during the Performance Period. The pro rata portion of the Performance Shares shall equal the product of:

(A) the number of Performance Shares to which the Participant would otherwise be entitled in accordance with the foregoing provisions of this paragraph 4 had his or her employment not been terminated; and

(B) a fraction (not greater than one), the numerator of which is the number of days the Participant was employed by the Company or its Subsidiaries during the period beginning on the date of commencement of the Performance Period and ending on the Date of Termination, and the denominator of which is the number of days in the Performance Period.

The Shares to which the Participant is entitled pursuant to this subparagraph 4(e)(i) shall be transferred to the Participant in the year following the end of the Performance Period as soon as practical following the determinations described in subparagraphs 4(a) and 4(b) above, but not later than March 15 of the year following the end of the Performance Period.

(ii) If the Participant's Date of Termination occurs by reason of the Participant's death, Retirement or Disability prior to the end of the Performance Period, the Participant will be entitled to receive a pro rata portion of his or her earned Performance Shares based on the length of his or her employment during the Performance Period. The pro rata portion of the Performance Shares shall equal the product of:

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(A) the number of Performance Shares to which the Participant would otherwise be entitled in accordance with the foregoing provisions of this paragraph 4 if no Date of Termination had occurred; and

(B) a fraction (not greater than one), the numerator of which is the number of days during the period beginning on the date of commencement of the Performance Period and ending on the date of the Participant’s death, Retirement or Disability, and the denominator of which is the number of days in the Performance Period.

Notwithstanding the foregoing, if the Participant’s Date of Termination occurs by reason of the Participant’s death, Retirement or Disability, the Committee may, in its sole discretion, increase the number of Performance Shares to which the Participant is entitled, but in no event will the Participant be entitled to a distribution that is greater than what would have been distributable if no Date of Termination had occurred. The Shares to which the Participant is entitled pursuant to this subparagraph 4(e)(ii) shall be transferred to the Participant in the year following the end of the Performance Period as soon as practical following the determinations described in paragraphs 4(a) and 4(b) above, but not later than March 15 of the year following the end of the Performance Period.

(iii) Subject to the provisions of Section 14.2 of the Plan (relating to the adjustment of Shares), if a Change in Control occurs prior to a Participant's Date of Termination and before the end of the Performance Period and, within two (2) years after the occurrence of the Change in Control, the Participant's Date of Termination occurs by reason of discharge by the Participant's employer without Cause or the Participant resigns from employment with the employer for Good Reason, the Participant shall become vested in all Performance Shares granted under this Agreement prior to the Change in Control that are held by the Participant as of the Date of Termination, in accordance with subparagraphs 4(e)(iv) or 4(e)(v), as applicable.

(iv) With respect to any Performance Shares that become vested in connection with a Change in Control described in Subsection 2.7(a), (b), (c) or (d) of the Plan, the number of Shares to which the Participant is entitled upon the vesting of his or her Performance Shares shall be calculated as if the Company had achieved 100% performance against its Performance Goals, and shall be transferred to the Participant as soon as practicable following the Date of Termination. Following a distribution in accordance with this subparagraph 4(e)(iv), the Participant shall have no further rights under this Agreement.

(v) With respect to any Performance Shares that become vested in connection with a Change in Control described in Subsection 2.7(e) of the Plan, with respect to a Participant as described therein (relating to certain transactions involving a Subsidiary or Business Segment), as soon as practicable following the Date of Termination, the Participant shall receive a distribution of the following number of Shares, determined on the assumption that the Company achieved 100% performance against its Performance Goals as follows:

(A) If the Date of Termination occurs during the first year of the Performance Period, the Participant shall be entitled to receive Shares equal in number to one-third (1/3) of his or her Performance Shares.

(B) If the Date of Termination occurs during the second year of the Performance Period, the Participant shall be entitled to receive Shares equal in number to two-thirds (2/3) of his or her Performance Shares.

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(C) If a Date of Termination occurs during the third year of the Performance Period, such Participant shall be entitled to receive Shares equal in number to the total of all of his or her Performance Shares.

Following a distribution in accordance with this subparagraph 4(e)(v), the Participant shall have no further rights under this Agreement.

(vi) For purposes of subparagraphs 4(e)(iii) and 4(e)(v) hereof, if, as a result of a Change in Control described in Subsection 2.7(e) of the Plan, the Participant’s employer ceases to be a Subsidiary (and the Participant’s employer is or becomes an entity that is separate from the Company), and the Participant is not, immediately following the Change in Control, employed by the Company or an entity that is then a Subsidiary, then the occurrence of the Change in Control shall be treated as the Participant’s Date of Termination caused by the Participant being discharged by the employer without Cause.

(f) Except pursuant to a domestic relations order, the Performance Shares may not be sold, assigned, transferred, pledged or otherwise encumbered until Shares have been distributed to the Participant free and clear of all restrictions.

5. Withholding. The granting, vesting and settlement of Performance Shares under this Agreement are subject to withholding of all applicable taxes. Subject to such rules and limitations as may be established by the Committee from time to time, the Participant may satisfy his or her withholding obligations through (i) payment of cash to the Company equal to the amount of taxes required to be withheld, (ii) contemporaneously withholding from other sources of income otherwise payable to the Participant by the Company or any Subsidiary, or (iii) the surrender of Shares which the Participant already owns, or to which the Participant is otherwise entitled under the Plan or this Agreement; provided, however, that, except as otherwise provided by the Committee, Shares otherwise payable under this Agreement may not be used to satisfy more than the Company's minimum statutory withholding obligation (based on minimum statutory withholding rates for income tax purposes, including payroll taxes, that are applicable to such supplemental taxable income) . In the event that the withholding obligation arises during a period in which the Participant is prohibited from trading in Common Stock pursuant to the Company’s insider trading policy, or by applicable securities or other laws, then unless otherwise elected by the Participant during a period when he or she was not so restricted from trading, the Company shall automatically satisfy the Participant’s withholding obligation by withholding from Shares otherwise deliverable under this Agreement.

6. Heirs and Successors. This Agreement shall be binding upon, and inure to the benefit of, the Company and its successors and assigns, including any person acquiring, whether by merger, consolidation, purchase of assets or otherwise, all or substantially all of the Company's assets and business. If any rights of the Participant or benefits distributable to the Participant under this Agreement have not been exercised or distributed, respectively, at the time of the Participant's death, such rights shall be exercisable by the Designated Beneficiary, and such benefits shall be distributed to the Designated Beneficiary, in accordance with the provisions of this Agreement and the Plan. If a deceased Participant fails to designate a beneficiary, or if the Designated Beneficiary does not survive the Participant, any rights that would have been exercisable by the Participant and any benefits distributable to the Participant shall be exercised by or distributed to the legal representative of the estate of the Participant. If the Designated Beneficiary survives the Participant but dies before the exercise of all rights or the complete distribution of benefits under this Agreement, then any remaining rights and any remaining benefit distribution shall be exercisable by or distributed to the legal representative of the estate of the Designated Beneficiary.

7. Administration. The authority to manage and control the operation and administration of this Agreement shall be vested in the Committee, and the Committee shall have all powers with respect to this Agreement as it has with respect to the Plan. Any interpretation of this Agreement by the Committee and any decision made by it with respect to this Agreement shall be final and binding on all persons.

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8. Modification of Performance Goals. Pursuant to Subsection 2.33(b) of the Plan, in determining the extent to which the Performance Goals (but not the Threshold Goal) have been achieved, the Committee may, in its sole discretion, include or exclude items or events that impact the final results, positively or negatively, as it deems appropriate.

9. Plan Governs. Notwithstanding anything in this Agreement to the contrary, the terms of this Agreement shall be subject to the terms of the Plan, a copy of which may be obtained by the Participant from the Director, Compensation of the Company. This Agreement is subject to all interpretations, amendments, rules and regulations promulgated by the Committee from time to time pursuant to the Plan.

10. Not An Employment Contract. The grant of Performance Shares hereunder will not confer on the Participant any right with respect to continuance of employment or other service with the Company or any Subsidiary, nor will it interfere in any way with any right the Company or any Subsidiary would otherwise have to terminate or modify the terms of such Participant's employment or other service at any time.

11. Notices. Any written notices provided for in this Agreement or the Plan shall be provided in accordance with subparagraph 11(a) or 11(b), as applicable and, if provided to the Company, shall be addressed as follows:

GATX Corporation

222 West Adams Street

Chicago, IL 60606-5314

U.S.A.

(a) Any notice required by the Participant pursuant to the definition of Good Reason, as defined below, shall be in writing given by hand delivery or by registered or certified mail, return receipt requested, postage prepaid, addressed to the Senior Vice President, Human Resources and shall be effective when actually received.

(b) All other notices shall be in writing and shall be deemed sufficiently given if either hand delivered or if sent by fax or overnight courier, or by postage paid first class mail. Any such notice sent by mail shall be deemed received three business days after mailing, but in no event later than the date of actual receipt and shall be directed, if to the Participant, at the Participant's address indicated by the Company's records, or if to the Company, to the attention of the Director, Compensation.

12. Amendment. This Agreement may be amended in accordance with the provisions of the Plan, and may otherwise be amended by written agreement of the parties.

13. Definitions. For purposes of this Agreement, the terms used in this Agreement shall be subject to the following:

“3-Year Average Return on Equity” shall mean the sum of net income divided by average equity for each year in the Performance Period divided by three (3). Accumulated other comprehensive income is excluded from equity.

“3-Year Cumulative Investment Volume” shall mean the sum of consolidated cumulative GAAP basis portfolio investments and capital additions as reported on the company’s audited balance sheet for each year in the Performance Period. Purchases of leased in assets are excluded.

“Cause” shall mean (i) the willful and continued failure of the Participant to perform the Participant’s duties with the Company or one of its affiliates (other than any such failure resulting from incapacity due to physical or mental illness), or (ii) the willful engaging by the Participant in illegal conduct or gross misconduct in the course of his or her discharge of duties for the Company. For purposes of this provision, no act or failure to act, on the part of the Participant, shall be considered “willful” unless it is done, or

5

omitted to be done, by the Participant in bad faith or without reasonable belief, that the Participant’s action or omission was in the best interests of the Company.

“Change in Control” shall have the meaning ascribed to it in Section 2.7 of the Plan.

“Date of Termination” shall mean the date on which the Participant incurs a Termination of Service.

“Designated Beneficiary” shall mean the beneficiary or beneficiaries designated by the Participant in a writing filed with the Committee in such form and at such time as the Committee shall require.

“Disability” shall mean, except as otherwise provided by the Committee, the period in which the Participant is considered to be "disabled" as that term is defined in the Company's long term disability plan.

“Good Reason” shall mean the occurrence of one or more of the following conditions without the consent of the Participant:

(a) a material diminution in the Participant's base compensation, compared with the Participant's base compensation in effect immediately prior to the consummation of a Change in Control;

(b) a material diminution in the Participant's authority, duties, or responsibilities, compared with the authority, duties, and responsibilities of the Participant immediately prior to the consummation of a Change in Control;

(c) the Participant is required to report to a supervisor with materially less authority, duties, or responsibilities than the authority, duties, and responsibilities of the supervisor who had the greatest such authority, duties, and responsibilities at the time the Participant was required to report to such supervisor during the 120-day period immediately preceding the consummation of a Change in Control;

(d) a material diminution in the budget over which the Participant retains authority, compared with the most significant budget, if any, over which the Participant had authority at any time during the 120-day period immediately preceding the consummation of a Change in Control;

(e) a material change in the geographic location at which the Participant must perform services; or

(f) any other action or inaction by the Company that constitutes a material breach of any change of control agreement between the Company and the Participant that is in effect when a Change in Control occurs.

If (I) the Participant provides written notice to the Company of the occurrence of Good Reason within a reasonable time (not more than 90 days) after the Participant has knowledge of the circumstances constituting Good Reason, which notice specifically identifies the circumstances which the Participant believes constitute Good Reason; (II) the Company fails to notify the Participant of the Company's intended method of correction within a reasonable period of time (not less than 30 days) after the Company receives the notice, or the Company fails to correct the circumstances within a reasonable period of time after such notice (except that no such opportunity to correct shall be applicable if the circumstances constituting Good Reason are those described in paragraph (e) above, relating to relocation); and (III) the Participant resigns within a reasonable time after receiving the Company's response, if such notice does not indicate an intention to correct such circumstances, or within a reasonable time after the Company fails to correct such circumstances (provided that in no event may such termination occur more than two (2) years after the initial existence of the condition constituting Good Reason); then the Participant shall be considered to have terminated for Good Reason.

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“Performance Goals” shall mean 3-Year Average Return on Equity and 3-Year Cumulative Investment Volume established by the Committee for the Performance Period as set forth in Exhibit 1.

“Retirement shall mean retirement of the Participant on a "Retirement Date," as that term is defined in the GATX Corporation Non-Contributory Pension Plan for Salaried Employees.

7

Exhibit 1

Performance Goals, Weights and % of Target Earned

2013 – 2015 Performance Period

3-Year Average ROE (1) (50% weight)	% of Target Grant Earned
<9.5%	0%
9.5%	25%
10.0%	50%
10.5%	75%
11.0%	100%
12.0%	125%
12.5%	150%
13.0%	175%
>= 13.5%	200%

Interpolated for actual performance between levels shown

(1) 3-Year Average Return on Equity is defined as the sum of net income divided by average equity for each year in the Performance Period divided by three (3); excludes accumulated other comprehensive income from equity.

3-Year Cumulative Investment Volume (2) (50% weight)	% of Target Grant Earned
<$1.40 billion	0%
$1.40 billion	25%
$1.70 billion	50%
$2.00 billion	75%
$2.30 billion	100%
$2.45 billion	125%
$2.70 billion	150%
$2.90 billion	175%
>= $3.10 billion	200%

Interpolated for actual performance between levels shown

(2) 3-Year Cumulative Investment Volume is defined as the sum of consolidated cumulative GAAP basis portfolio investments and capital additions as externally reported for each year in the Performance Period; excludes purchases of leased in assets.

In determining the extent to which the Performance Goals (but not the Threshold Goal) have been achieved, the Committee, in its sole discretion, may include or exclude items or events that impact the final results, positively or negatively. However, in no event will the award exceed the Unadjusted Award Amount.

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Exhibit 2

Sample Calculation of Performance Shares Earned

Number of Performance Shares Granted:        1,000

Performance Goal	Weight	Target Goal	Assumed Actual	Payout Percentage	Weighted Payout Percentage
3-Year Average ROE 3-Year Cumulative Investment Volume	50% 50%	11.0% $2.30 billion	12.5% $2.00 billion	150% 75%	75.0% 37.5%
Total Weighted Payout					112.5%

Performance Shares Earned
Shares Granted	Weighted Payout	Total Performance Shares Earned
1,000 x	112.5%	= 1,125

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EX-12

Exhibit 12

GATX CORPORATION AND SUBSIDIARIES

COMPUTATION OF RATIOS OF EARNINGS TO COMBINED FIXED CHARGES

AND PREFERRED STOCK DIVIDENDS

	Year Ended December 31
	2012		2011		2010		2009		2008
	In millions, except ratios
Earnings available for fixed charges:
Income before income taxes	$	143.8	$	107.6	$	59.3	$	78.9	$	177.0
Add:
Dividends from affiliated companies	35.1		29.2		36.6		36.0		56.2
Total fixed charges	227.0		232.6		234.5		236.9		230.2
Total earnings available for fixed charges	$	405.9	$	369.4	$	330.4	$	351.8	$	463.4
Fixed charges:
Interest expense	168.5		$	169.6	$	167.3	$	168.0	$	151.6
Interest portion of operating lease expense	58.5		62.9		67.1		68.8		78.5
Preferred dividends on pre-tax basis	—		0.1		0.1		0.1		0.1
Total fixed charges	227.0		$	232.6	$	234.5	$	236.9	$	230.2
Ratio of earnings to fixed charges	1.79		1.59		1.41		1.49		2.01

EX-21

Exhibit 21

SUBSIDIARIES OF THE REGISTRANT

The following is a list of significant subsidiaries included in GATX’s consolidated financial statements and the state or country of incorporation of each:

Company Name	State or Country of Incorporation
American Steamship Company	New York
GATX Terminals Overseas Holding Corporation	Delaware
GATX Global Finance B.V.	Netherlands
GATX Global Holding GmbH	Switzerland
GATX Rail Austria GmbH	Austria
GATX Third Aircraft LLC	Delaware
GATX International Limited	United Kingdom

EX-23

Exhibit 23

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the Registration Statement (Form S-3 No. 333-168879) and related Prospectus of GATX Corporation: the Registration Statement (Form S-8 No. 333-182219) pertaining to the 2012 Incentive Award Plan, the Registration Statement (Form S-8 No. 333-116626) pertaining to the 2004 Equity Incentive Compensation Plan, the 1995 Long-Term Incentive Compensation Plan, and the 1985 Long-Term Incentive Compensation Plan, the Registration Statement (Form S-8 No. 333-145581) pertaining to the Salaried Employees Retirement Savings Plan, the Registration Statement (Form S-8 No. 33-41007) pertaining to the Salaried Employees Retirement Savings Plan, the Registration Statement (Form S-8 No. 2-92404) pertaining to the Salaried Employees Savings Plan, and the Registration Statement (Form S-8 No. 333-145583) pertaining to the Hourly Employees Retirement Savings Plan of GATX Corporation of our reports dated February 26, 2013, with respect to the consolidated financial statements and schedule of GATX Corporation and the effectiveness of internal control over financial reporting of GATX Corporation included in this Annual Report (Form 10-K) of GATX Corporation for the year ended December 31, 2012.

/s/ Ernst & Young LLP

Ernst & Young LLP

Chicago, Illinois

February 26, 2013

EX-24.1

Exhibit 24.1

POWER OF ATTORNEY

The undersigned director of GATX Corporation, a New York corporation, does hereby constitute and appoint Robert C. Lyons, Deborah A. Golden and William M. Muckian or any of them, attorneys and agents of the udersigned, with full power and authority to sign in such Director's name, and on behalf of GATX Corporation, the Annual Report on Form 10-K for the year ended December 31, 2012, under the Securities Exchange Act of 1934, together with any amendments thereto, hereby ratifying and confirming all that said attorneys and agents and each of them may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set her hand and seal.

/s/  Anne L. Arvia    

Anne L. Arvia

Director

Date: 2/12/13

EX-24.2

Exhibit 24.2

POWER OF ATTORNEY

The undersigned director of GATX Corporation, a New York corporation, does hereby constitute and appoint Robert C. Lyons, Deborah A. Golden and William M. Muckian or any of them, attorneys and agents of the udersigned, with full power and authority to sign in such Director's name, and on behalf of GATX Corporation, the Annual Report on Form 10-K for the year ended December 31, 2012, under the Securities Exchange Act of 1934, together with any amendments thereto, hereby ratifying and confirming all that said attorneys and agents and each of them may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal.

/s/  Ernst A. Häberli    

Ernst A. Häberli

Director

Date: 1/14/13

EX-24.3

Exhibit 24.3

POWER OF ATTORNEY

The undersigned director of GATX Corporation, a New York corporation, does hereby constitute and appoint Robert C. Lyons, Deborah A. Golden and William M. Muckian or any of them, attorneys and agents of the udersigned, with full power and authority to sign in such Director's name, and on behalf of GATX Corporation, the Annual Report on Form 10-K for the year ended December 31, 2012, under the Securities Exchange Act of 1934, together with any amendments thereto, hereby ratifying and confirming all that said attorneys and agents and each of them may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal.

/s/  Brian A. Kenney    

Brian A. Kenney

Director

Date: 2/12/13

EX-24.4

Exhibit 24.4

POWER OF ATTORNEY

The undersigned director of GATX Corporation, a New York corporation, does hereby constitute and appoint Robert C. Lyons, Deborah A. Golden and William M. Muckian or any of them, attorneys and agents of the udersigned, with full power and authority to sign in such Director's name, and on behalf of GATX Corporation, the Annual Report on Form 10-K for the year ended December 31, 2012, under the Securities Exchange Act of 1934, together with any amendments thereto, hereby ratifying and confirming all that said attorneys and agents and each of them may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal.

/s/  Mark G. McGrath    

Mark G. McGrath

Director

Date: 2/18/13

EX-24.5

Exhibit 24.5

POWER OF ATTORNEY

The undersigned director of GATX Corporation, a New York corporation, does hereby constitute and appoint Robert C. Lyons, Deborah A. Golden and William M. Muckian or any of them, attorneys and agents of the udersigned, with full power and authority to sign in such Director's name, and on behalf of GATX Corporation, the Annual Report on Form 10-K for the year ended December 31, 2012, under the Securities Exchange Act of 1934, together with any amendments thereto, hereby ratifying and confirming all that said attorneys and agents and each of them may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal.

/s/  James B. Ream    

James B. Ream

Director

Date: 2/12/13

EX-24.6

Exhibit 24.6

POWER OF ATTORNEY

The undersigned director of GATX Corporation, a New York corporation, does hereby constitute and appoint Robert C. Lyons, Deborah A. Golden and William M. Muckian or any of them, attorneys and agents of the udersigned, with full power and authority to sign in such Director's name, and on behalf of GATX Corporation, the Annual Report on Form 10-K for the year ended December 31, 2012, under the Securities Exchange Act of 1934, together with any amendments thereto, hereby ratifying and confirming all that said attorneys and agents and each of them may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal.

/s/  Robert J. Ritchie    

Robert J. Ritchie

Director

Date: 2/15/13

EX-24.7

Exhibit 24.7

POWER OF ATTORNEY

The undersigned director of GATX Corporation, a New York corporation, does hereby constitute and appoint Robert C. Lyons, Deborah A. Golden and William M. Muckian or any of them, attorneys and agents of the udersigned, with full power and authority to sign in such Director's name, and on behalf of GATX Corporation, the Annual Report on Form 10-K for the year ended December 31, 2012, under the Securities Exchange Act of 1934, together with any amendments thereto, hereby ratifying and confirming all that said attorneys and agents and each of them may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal.

/s/  David S. Sutherland    

David S. Sutherland

Director

Date: 2/18/13

EX-24.8

Exhibit 24.8

POWER OF ATTORNEY

The undersigned director of GATX Corporation, a New York corporation, does hereby constitute and appoint Robert C. Lyons, Deborah A. Golden and William M. Muckian or any of them, attorneys and agents of the udersigned, with full power and authority to sign in such Director's name, and on behalf of GATX Corporation, the Annual Report on Form 10-K for the year ended December 31, 2012, under the Securities Exchange Act of 1934, together with any amendments thereto, hereby ratifying and confirming all that said attorneys and agents and each of them may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal.

/s/  Casey J. Sylla    

Casey J. Sylla

Director

Date: 2/18/13

EX-24.9

Exhibit 24.9

POWER OF ATTORNEY

The undersigned director of GATX Corporation, a New York corporation, does hereby constitute and appoint Robert C. Lyons, Deborah A. Golden and William M. Muckian or any of them, attorneys and agents of the udersigned, with full power and authority to sign in such Director's name, and on behalf of GATX Corporation, the Annual Report on Form 10-K for the year ended December 31, 2012, under the Securities Exchange Act of 1934, together with any amendments thereto, hereby ratifying and confirming all that said attorneys and agents and each of them may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal.

/s/  Paul G. Yovovich    

Paul G. Yovovich

Director

Date: 2/12/13

EX-31.1

Exhibit 31.1

Certification of Principal Executive Officer

I, Brian A. Kenney, certify that:

1. I have reviewed this Annual Report on Form 10-K of GATX Corporation (the "Company");

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the Company as of, and for, the periods presented in this report;

4. The Company’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the Company and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the Company, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this annual report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the Company’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the Company’s internal control over financial reporting that occurred during the Company’s most recent fiscal quarter (the Company’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting; and

5. The Company’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the Company’s auditors and the audit committee of the Company’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the Company’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the Company’s internal control over financial reporting.

/S/    BRIAN A. KENNEY        

Brian A. Kenney

Chairman, President and Chief Executive Officer

February 26, 2013

EX-31.2

Exhibit 31.2

Certification of Principal Financial Officer

I, Robert C. Lyons, certify that:

1. I have reviewed this Annual Report on Form 10-K of GATX Corporation (the "Company");

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the Company as of, and for, the periods presented in this report;

4. The Company’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the Company and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the Company, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this annual report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the Company’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the Company’s internal control over financial reporting that occurred during the Company’s most recent fiscal quarter (the Company’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting; and

5. The Company’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the Company’s auditors and the audit committee of the Company’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the Company’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the Company’s internal control over financial reporting.

/S/    ROBERT C. LYONS      

Robert C. Lyons

Senior Vice President and Chief Financial Officer

February 26, 2013

EX-32

Exhibit 32

GATX CORPORATION AND SUBSIDIARIES

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of GATX Corporation (the “Company”) on Form 10-K for the period ending December 31, 2011, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), each of the undersigned officers of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/    BRIAN A. KENNEY	/s/    ROBERT C. LYONS
Brian A. Kenney Chairman, President and Chief Executive Officer	Robert C. Lyons Senior Vice President and Chief Financial Officer

February 26, 2013

This certification accompanies the Report pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and shall not be deemed filed by GATX Corporation for purposes of Section 18 of the Securities Exchange Act of 1934, as amended.

A signed original of this written statement required by Section 906 has been provided to GATX Corporation and will be retained by GATX Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

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Fair Value Disclosure (Tables)

12 Months Ended

Dec. 31, 2012

Fair Value Disclosures [Abstract]

Assets and liabilities at fair value recurring basis

The following tables set forth GATX’s assets and liabilities measured at fair value on a recurring basis as of December 31 (in millions):

Assets	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total December 31, 2012
Interest rate derivatives (a)	$	—	$	10.2	$	—	$	10.2
Available for sale equity securities	3.3		—		—		3.3
Liabilities
Interest rate derivatives (a)	—		1.0		—		1.0
Interest rate derivatives (b)	—		0.3		—		0.3
Foreign exchange rate derivatives (b)	—		2.1		—		2.1

Assets	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total December 31, 2011
Interest rate derivatives (a)	$	—	$	15.3	$	—	$	15.3
Foreign exchange rate derivatives (b)	—		2.1		—		2.1
Available for sale equity securities	2.9		—		—		2.9
Liabilities
Interest rate derivatives (a)	—		2.1		—		2.1
Interest rate derivatives (b)	—		0.3		—		0.3

_________

(a)     Designated as hedges

(b)     Not designated as hedges

Non-recurring Level 3 fair value measurements

The following table sets forth certain disclosures relating to GATX’s non-recurring Level 3 fair value measurements in 2012 and 2011(in millions):

	Fair Value of Assets		Impairment Losses
2012
Investment in affiliated companies	$	32.9	$	14.8
Operating assets	0.7		0.7
2011
Operating assets	2.8		4.1

Impact of GATX's Derivative Instrument On Income Statement and Other comprehensive income (loss)

The income statement and other comprehensive income (loss) impacts of GATX’s derivative instruments for the years ended December 31 were (in millions):

Derivative Designation	Location of Gain (Loss) Recognized	2012			2011			2010
Fair value hedges *	Interest expense	$	5.0		$	2.3		$	(7.4	)
Cash flow hedges	Other comprehensive loss (effective portion)	(0.2		)	(5.9		)	(8.1		)
Cash flow hedges	Interest expense (effective portion reclassified from accumulated other comprehensive loss)	4.2			2.5			7.7
Cash flow hedges	Operating lease expense (effective portion reclassified from accumulated other comprehensive loss)	1.4			1.5			1.5
Cash flow hedges	Other (expense) income (ineffective portion)	(0.1		)	—			(0.1		)
Non-designated	Other (expense) income	(5.0		)	1.8			0.4

_________

(*) Equally offsetting the amount recognized in interest expense was the fair value adjustment relating to the underlying debt.

Fair Value Other Financial Instruments

The following table sets forth the carrying amounts and fair values of GATX’s other financial instruments as of December 31 (in millions):

	2012		2012		2011		2011
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets
Investment Funds	$	2.5	$	5.8	$	2.7	$	7.4
Loans	27.2		27.7		30.4		30.7
Liabilities
Recourse fixed rate debt	$	2,343.3	$	2,513.4	$	2,627.2	$	2,754.9
Recourse floating rate debt	809.1		807.9		727.6		714.8
Nonrecourse debt	130.6		138.2		149.4		159.3

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Other Assets and Other Liabilities (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Components of Other Assets reported on the consolidated balance sheets
Inventory	$ 49.1	$ 42.1
Office furniture, fixtures and other equipment, net of accumulated depreciation	35.8	32.7
Derivatives	10.2	17.4
Deferred financing costs	14.8	16.1
Assets held for sale	10.1	0.5
Assets held for sale	6.5	6.4
Prepaid items	9.5	12.5
Other	50.7	52.4
Total	$ 186.7	$ 180.1

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Significant Accounting Policies (Gain on Asset Dispositions) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Significant Acquisitions and Disposals [Line Items]
Disposition gains	$ 42.7	$ 40.4	$ 23.8
Residual sharing income	22.6	5.2	7.6
Non-remarketing disposition gains	19.2	27.0	18.0
Asset impairments	(5.0)	(6.8)	(8.3)
Net Gain on Asset Dispositions	$ 79.5	$ 65.8	$ 41.1

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Accumulated Other Comprehensive Income (Loss) (Tables)

12 Months Ended

Dec. 31, 2012

Equity [Abstract]

Accumulated other comprehensive income (loss)

The change in components for accumulated other comprehensive income (loss) were as follows (in millions):

	Foreign    Currency  Translation  Gain (Loss)			Unrealized  Gain (Loss) on Securities			Unrealized Loss on    Derivative Instruments			Post- RetirementBenefit Plans			Total
Balance at December 31, 2009	$	74.4		$	(1.7	)	$	(52.2	)	$	(105.0	)	$	(84.5	)
Change in component	(28.4		)	1.4			(12.2		)	3.7			(35.5		)
Reclassification adjustments into earnings	—			—			9.2			4.5			13.7
Income tax effect	—			(0.1		)	(0.5		)	(3.1		)	(3.7		)
Balance at December 31, 2010	46.0			(0.4		)	(55.7		)	(99.9		)	(110.0		)
Change in component	(41.2		)	(1.2		)	(6.6		)	(36.0		)	(85.0		)
Reclassification adjustments into earnings	1.6			0.9			4.0			5.8			12.3
Income tax effect	—			0.1			2.1			11.4			13.6
Balance at December 31, 2011	6.4			(0.6		)	(56.2		)	(118.7		)	(169.1		)
Change in component	25.0			0.5			6.2			(28.8		)	2.9
Reclassification adjustments into earnings	—			(0.4		)	6.5			8.7			14.8
Income tax effect	—			0.1			(1.0		)	7.7			6.8
Balance at December 31, 2012	$	31.4		$	(0.4	)	$	(44.5	)	$	(131.1	)	$	(144.6	)

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Condensed Financial Information of Registrant - Balance Sheets (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Assets
Cash and cash equivalents	$ 234.2	$ 248.4	$ 78.5	$ 41.7
Operating assets and facilities, net	4,654.4	4,359.3
Investments in affiliated companies	502.0	513.8	486.1
Other assets	186.7	180.1
Total Assets	6,055.4	5,857.5	5,442.4
Liabilities and Shareholders’ Equity
Accounts payable and accrued expenses	177.4	135.6
Debt	3,567.9	3,547.1
Other liabilities	282.9	281.6
Total Liabilities	4,811.2	4,730.2
Total Shareholders’ Equity	1,244.2	1,127.3	1,113.7
Total Liabilities and Shareholders’ Equity	6,055.4	5,857.5
Parent Company [Member]
Assets
Cash and cash equivalents	183.5	208.4	48.9	28.1
Operating assets and facilities, net	2,501.7	2,355.9
Investments in affiliated companies	2,043.8	2,010.9
Other assets	440.0	478.1
Total Assets	5,169.0	5,053.3
Liabilities and Shareholders’ Equity
Accounts payable and accrued expenses	105.0	56.1
Debt	2,761.1	2,986.6
Other liabilities	1,058.7	883.3
Total Liabilities	3,924.8	3,926.0
Total Shareholders’ Equity	1,244.2	1,127.3
Total Liabilities and Shareholders’ Equity	$ 5,169.0	$ 5,053.3

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Investments in Affiliated Companies (Future Lease Receipts) (Details 8) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012
Schedule of Equity Method Investments [Line Items]
2013	$ 784.4	[1]
2014	594.2	[1]
2015	465.8	[1]
2016	346.1	[1]
2017	223.0	[1]
Years thereafter	461.7	[1]
Total future receipts from leases	2,875.2	[1]
RRPF Joint Ventures [Member]
Schedule of Equity Method Investments [Line Items]
2013	254.0
2014	233.5
2015	219.4
2016	199.9
2017	169.4
Years thereafter	457.1
Total future receipts from leases	1,533.3
RRPF Joint Ventures [Member] | Rolls-Royce [Member]
Schedule of Equity Method Investments [Line Items]
2013	120.9
2014	118.9
2015	119.7
2016	111.3
2017	89.4
Years thereafter	275.0
Total future receipts from leases	835.2
RRPF Joint Ventures [Member] | Third Parties [Member]
Schedule of Equity Method Investments [Line Items]
2013	133.1
2014	114.6
2015	99.7
2016	88.6
2017	80.0
Years thereafter	182.1
Total future receipts from leases	$ 698.1

[1] The future contractual receipts due under operating leases include executory costs in the case of GATX's full service leases.

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Significant Accounting Policies (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 Entity Category	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Accounting Policies [Abstract]
Overstatement in each of cash and cash equivalent, accounts payable and accrued expenses and in net cash provided by operating activities				$ 13.1
Wholly-owned bankruptcy remote special-purpose corporations	6
Number of categories for reservable assets	2
Gain (losses) from foreign currency transactions and from re-measurement of non-functional currency denominated assets and liabilities	0.5	(1.6)	(1.7)
Interest expense net of interest income on bank deposits	1.9	0.7	0.2
Total operating lease expense	$ 133.3	$ 137.3	$ 145.4

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Fair Value Disclosure (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Assets
Available for sale equity securities	$ 3.3		$ 2.9
Designated as Hedging Instrument [Member]
Assets
Interest rate derivatives	10.2	[1]	15.3	[1]
Liabilities
Interest rate derivatives	1.0	[1]	2.1	[1]
Not Designated as Hedging Instrument [Member]
Assets
Foreign exchange rate derivatives			2.1	[2]
Liabilities
Interest rate derivatives	0.3	[2]	0.3	[2]
Foreign exchange rate derivatives	2.1	[2]
Fair Value, Inputs, Level 1 [Member]
Assets
Available for sale equity securities	3.3		2.9
Fair Value, Inputs, Level 1 [Member] | Designated as Hedging Instrument [Member]
Assets
Interest rate derivatives	0	[1]	0	[1]
Liabilities
Interest rate derivatives	0	[1]	0	[1]
Fair Value, Inputs, Level 1 [Member] | Not Designated as Hedging Instrument [Member]
Assets
Foreign exchange rate derivatives			0	[2]
Liabilities
Interest rate derivatives	0	[2]	0	[2]
Foreign exchange rate derivatives	0	[2]
Fair Value, Inputs, Level 2 [Member]
Assets
Available for sale equity securities	0		0
Fair Value, Inputs, Level 2 [Member] | Designated as Hedging Instrument [Member]
Assets
Interest rate derivatives	10.2	[1]	15.3	[1]
Liabilities
Interest rate derivatives	1.0	[1]	2.1	[1]
Fair Value, Inputs, Level 2 [Member] | Not Designated as Hedging Instrument [Member]
Assets
Foreign exchange rate derivatives			2.1	[2]
Liabilities
Interest rate derivatives	0.3	[2]	0.3	[2]
Foreign exchange rate derivatives	2.1	[2]
Fair Value, Inputs, Level 3 [Member]
Assets
Available for sale equity securities	0		0
Fair Value, Inputs, Level 3 [Member] | Designated as Hedging Instrument [Member]
Assets
Interest rate derivatives	0	[1]	0	[1]
Liabilities
Interest rate derivatives	0	[1]	0	[1]
Fair Value, Inputs, Level 3 [Member] | Not Designated as Hedging Instrument [Member]
Assets
Foreign exchange rate derivatives			0	[2]
Liabilities
Interest rate derivatives	0	[2]	0	[2]
Foreign exchange rate derivatives	$ 0	[2]

[1] Designated as hedges

[2] Not designated as hedges

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Income Taxes (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating Loss Carryforwards [Line Items]
Cumulative amount of undistributed earning of foreign subsidiaries	$ 551.4
Alternative minimum tax credit	5.2	8.9
Foreign tax credit	7.3	13.9
Foreign tax credits valuation allowance	7.3	13.9
State net operating loss	26.6	31.1
State net operating loss carryforwards valuation allowance	12.8	15.8
Foreign net operating loss	9.5	7.3
Unrecognized Tax Benefits	4.7	20.8	42.7
Decrease in income tax expenses unrecognized tax benefits if recognized	3.2	18.8
Unrecognized foreign tax benefits	0.4
Reductions due to expiration of the applicable statute of limitations	16.1	0
Expiration of the applicable statute of limitations	15.5		0
Reductions due to settlement of audit issues	0	(21.9)
Settlement of audit issues	0	4.8	(9.5)
Domestic Country [Member]
Operating Loss Carryforwards [Line Items]
Amount of U.S. federal tax net operating loss	$ 108.8

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Other Assets And Other Liabilities (Tables)

12 Months Ended

Dec. 31, 2012

Other Assets and Other Liabilities [Abstract]

Components of Other Assets reported on the consolidated balance sheets

The following table summarizes the components of Other Assets reported on the consolidated balance sheets as of December 31 (in millions):

	2012		2011
Inventory	$	49.1	$	42.1
Office furniture, fixtures and other equipment, net of accumulated depreciation	35.8		32.7
Derivatives	10.2		17.4
Deferred financing costs	14.8		16.1
Assets held for sale	10.1		0.5
Other investments	6.5		6.4
Prepaid items	9.5		12.5
Other	50.7		52.4
	$	186.7	$	180.1

Components of Other Liabilities reported on the consolidated balance sheets

The following table summarizes the components of Other Liabilities reported on the consolidated balance sheets as of December 31 (in millions):

	2012		2011
Accrued operating lease expense	$	56.3	$	67.3
Pension and other post-retirement liabilities	112.8		92.3
Deferred gains on sale-leasebacks	47.2		34.9
Unrecognized tax benefits	3.2		18.8
Environmental reserves	15.6		16.7
Deferred income	11.8		15.4
Derivatives	3.4		2.4
Other	32.6		33.8
	$	282.9	$	281.6

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Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Accounting Policies [Abstract]

Estimated lives of useful depreciable assets

The estimated depreciable lives of operating assets and facilities are as follows:

Railcars	30 — 38 years
Locomotives	10 — 20 years
Buildings	40 — 50 years
Leasehold improvements	5 — 15 years
Marine vessels	30 — 65 years
Other equipment	5 — 30 years

Net gain on disposition of assets

The following table presents the net gain on asset dispositions for the year ended (in millions) :

	2012			2011			2010
Disposition gains	$	42.7		$	40.4		$	23.8
Residual sharing income	22.6			5.2			7.6
Non-remarketing disposition gains	19.2			27.0			18.0
Asset impairments	(5.0		)	(6.8		)	(8.3		)
Net Gain on Asset Dispositions	$	79.5		$	65.8		$	41.1

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Fair Value Disclosure (Details 1) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in affiliated companies	$ 502.0	$ 513.8	$ 486.1
Asset Impairment Charges	5.0	6.8	8.3
Operating assets and facilities, net	4,654.4	4,359.3
Equity Method Investments [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in affiliated companies	32.9
Equity Method Investments [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Investments Impairment Charge [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset Impairment Charges	14.8
Equipment [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Operating assets and facilities, net	0.7	2.8
Equipment [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Asset Impairment Charge [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset Impairment Charges	$ 0.7	$ 4.1

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Legal Proceedings and Other Contingencies (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended		12 Months Ended
	Dec. 31, 2012 Site LegalMatter	Dec. 31, 2011	Dec. 31, 2012 Viareggio [Member] LegalMatter	Jun. 28, 2012 Viareggio [Member] Employee Insurance_Provider Subsidiaries Company	Jun. 29, 2009 Viareggio [Member] Car	Jan. 31, 2013 Asbestos Cases [Member] Pending Litigation [Member] LegalMatter	Jan. 31, 2013 Asbestos Cases [Member] Pending Litigation [Member] Jones Act claims [Member] LegalMatter	Jun. 29, 2009 Derailed [Member] Viareggio [Member] Car	Jun. 29, 2009 Overturned [Member] Viareggio [Member] Car	Jun. 29, 2009 Punctured and Ignited [Member] Viareggio [Member] Car	Jun. 29, 2009 Broken Axle [Member] Viareggio [Member] Car	Jun. 28, 2012 Will Not Reimburse the Costs of Criminal Defense [Member] Viareggio [Member] Insurance_Provider
Loss Contingencies [Line Items]
Number of tank cars								14	5	1	1
Number of casualties					32
Number of subsidiaries				2
Number of companies				4
Number of employees				18
Number of insurers				11								1
Asbestos - related cases pending against the company and its subsidiaries						188	156
New cases filed number			12
Cases dismissed or settled	18
Accruals for losses related to probable litigation matters	$ 2.0
Number of sites for which the Company is involved in environmental remediation	17
Accruals for remediation and restoration	$ 15.6	$ 16.7

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Variable Interest Entities (Details) (Variable Interest, Held by Entity [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Variable Interest, Held by Entity [Member]
Carrying amounts of assets and liabilities of the VIE
Operating assets, net of accumulated depreciation	$ 98.4	[1]	$ 104.3	[1]
Nonrecourse debt	$ 35.1		$ 45.2

[1] All operating assets are pledged as collateral on the nonrecourse debt.

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Pension and Other Post-Retirement Benefits (Details 6) (Domestic defined benefit pension plans [Member])	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Weighted-average asset allocations of domestic funded pension plans
Target asset allocation percentage	100.00%
Actual plan asset allocations	100.00%	100.00%
Equity Securities [Member]
Weighted-average asset allocations of domestic funded pension plans
Target asset allocation percentage	66.00%
Actual plan asset allocations	65.30%	64.10%
Debt Securities [Member]
Weighted-average asset allocations of domestic funded pension plans
Target asset allocation percentage	29.00%
Actual plan asset allocations	28.90%	30.10%
Real Estate [Member]
Weighted-average asset allocations of domestic funded pension plans
Target asset allocation percentage	5.00%
Actual plan asset allocations	5.80%	5.20%
Cash [Member]
Weighted-average asset allocations of domestic funded pension plans
Target asset allocation percentage	0.00%
Actual plan asset allocations	0.00%	0.60%

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Supplemental Cash Flow and Noncash Investing Transactions (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 Vessel
Supplemental Cash Flow and Noncash Investing and Financing Transactions (Textual) [Abstract]
Aggregate fair value of liquidating distributions	$ 88.8	[1]
Number of vessels containing liquidating distributions	6

[1] In connection with the dissolutions of GATX's Clipper Fourth Limited and Clipper Fourth APS affiliates, GATX received liquidating distributions of six vessels with an aggregate fair value of $88.8 million. See Note 6 for additional information.

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Goodwill (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 91.7	$ 90.5

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Debt (Details 1) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Maturities of GATX's debt obligations
Debt Principal, 2013	$ 485.7
Debt Principal, 2014	513.6
Debt Principal, 2015	552.5
Debt Principal, 2016	626.9
Debt Principal, 2017	236.2
Debt Principal, Thereafter	866.2
Total Debt	$ 3,281.1	$ 3,498.2

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Pension and Other Post-Retirement Benefits (Details 3)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Domestic defined benefit pension plans [Member] | Salaried Funded and Unfunded Plans [Member]
Expected long term return on assets and to measure the periodic cost
Discount rate, benefit obligation	3.95%	4.80%
Rate of compensation and pension-in-payment increases, benefit obligation	3.00%	3.00%
Discount rate, net periodic cost (benefit)	4.80%	5.25%
Expected return on plan assets, net periodic cost (benefit)	8.05%	8.65%
Rate of compensation and pension-in-payment increases, net periodic cost (benefit)	3.00%	4.50%
Domestic defined benefit pension plans [Member] | Hourly Funded Plans [Member]
Expected long term return on assets and to measure the periodic cost
Discount rate, benefit obligation	4.05%	4.85%
Discount rate, net periodic cost (benefit)	4.85%	5.25%
Expected return on plan assets, net periodic cost (benefit)	7.10%	7.80%
Foreign Funded Pension Plans, Defined Benefit [Member]
Expected long term return on assets and to measure the periodic cost
Discount rate, benefit obligation	4.25%	4.65%
Rate of compensation and pension-in-payment increases, benefit obligation	3.00%	2.90%
Discount rate, net periodic cost (benefit)	4.65%	5.40%
Expected return on plan assets, net periodic cost (benefit)	5.77%	6.12%
Rate of compensation and pension-in-payment increases, net periodic cost (benefit)	2.90%	3.40%
Retiree Health and Life [Member]
Expected long term return on assets and to measure the periodic cost
Discount rate, net periodic cost (benefit)	4.50%	4.95%
Retiree Health and Life [Member] | Salaried Health [Member]
Expected long term return on assets and to measure the periodic cost
Discount rate, benefit obligation	3.65%	4.50%
Retiree Health and Life [Member] | Hourly Health [Member]
Expected long term return on assets and to measure the periodic cost
Discount rate, benefit obligation	3.60%	4.60%
Discount rate, net periodic cost (benefit)	4.60%	4.95%
Retiree Health and Life [Member] | Salaried Life Insurance [Member]
Expected long term return on assets and to measure the periodic cost
Discount rate, benefit obligation	3.90%	4.75%
Discount rate, net periodic cost (benefit)	4.75%	4.95%
Retiree Health and Life [Member] | Hourly Life Insurance [Member]
Expected long term return on assets and to measure the periodic cost
Discount rate, benefit obligation	3.45%	4.45%
Discount rate, net periodic cost (benefit)	4.45%	4.95%

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Fair Value Disclosure (Details 3) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Assets
Loans	$ 27.2	$ 30.4
Carrying Amount [Member]
Assets
Investment Funds	2.5	2.7
Loans	27.2	30.4
Liabilities
Recourse fixed rate debt	2,343.3	2,627.2
Recourse floating rate debt	809.1	727.6
Nonrecourse debt	130.6	149.4
Fair Value [Member]
Assets
Investment Funds	5.8	7.4
Loans	27.7	30.7
Liabilities
Recourse fixed rate debt	2,513.4	2,754.9
Recourse floating rate debt	807.9	714.8
Nonrecourse debt	$ 138.2	$ 159.3

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Pension and Other Post-Retirement Benefits (Details 4)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Medical Claims [Member]
Review of historical returns
Health care cost trend assumed for next year	7.00%	7.50%
Rate to which the cost trend is expected to decline (the ultimate trend rate)	5.00%	5.00%
Year that rate reaches the ultimate trend rate	2019	2018
Prescription Drugs Claims [Member]
Review of historical returns
Health care cost trend assumed for next year	6.50%	7.50%
Rate to which the cost trend is expected to decline (the ultimate trend rate)	5.00%	5.00%
Year that rate reaches the ultimate trend rate	2017	2018

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Debt (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Line of Credit Facility [Line Items]
Operating assets pledged as collateral for notes	$ 606.7
Expiry of registration statement	August 2013
Fixed charge coverage ratio	1.8
Minimum debt covenant fixed charge coverage ratio	1.2
Amount of secured debt available to be borrowed in accordance with public debt covenants	918.6
Line of Credit US [Member]
Line of Credit Facility [Line Items]
Unsecured revolving credit facility	560.0
Maturity date of revolving credit facility	May 31, 2015
Availability under credit facility	365.3
Commercial paper	185.0
Letter of credit issued	9.7
Annual commitment fees	1.2	0.9	0.4
Line of Credit Europe [Member]
Line of Credit Facility [Line Items]
Unsecured revolving credit facility	112.1
Availability under credit facility	23.5
Maximum amount of GRE transfer to GATX relating to loans and dividends	81.4
Restricted net assets	$ 389.7

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Investments in Affiliated Companies (Future Debt Maturities) (Details 9) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Schedule of Equity Method Investments [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	$ 485.7
Long-term Debt, Maturities, Repayments of Principal in Year Two	513.6
Long-term Debt, Maturities, Repayments of Principal in Year Three	552.5
Long-term Debt, Maturities, Repayments of Principal in Year Four	626.9
Long-term Debt, Maturities, Repayments of Principal in Year Five	236.2
Long-term Debt, Maturities, Repayments of Principal after Year Five	866.2
Total Debt	3,283.0		3,504.2
RRPF Joint Ventures [Member]
Schedule of Equity Method Investments [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	64.2
Long-term Debt, Maturities, Repayments of Principal in Year Two	417.1
Long-term Debt, Maturities, Repayments of Principal in Year Three	622.0
Long-term Debt, Maturities, Repayments of Principal in Year Four	359.7
Long-term Debt, Maturities, Repayments of Principal in Year Five	245.6
Long-term Debt, Maturities, Repayments of Principal after Year Five	288.3
Total Debt	$ 1,996.9	[1]

[1] All debt obligations are nonrecourse to the shareholders.

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Shareholders' Equity

12 Months Ended

Dec. 31, 2012

Stockholders' Equity Note [Abstract]

Shareholders' Equity

Shareholders’ Equity

In 2008, the Company’s Board of Directors authorized a $200 million common stock repurchase program of which $68.4 million was available as of December 31, 2012.

In accordance with GATX’s certificate of incorporation, 120 million shares of common stock are authorized, at a par value of $0.625 per share. As of December 31, 2012, 66.0 million shares were issued and 46.9 million shares were outstanding.

The following shares of common stock were reserved as of December 31, 2012:

	Shares  (in millions)
Conversion of outstanding preferred stock	0.1
Share-based compensation award plans	6.5
	6.6

GATX’s certificate of incorporation also authorizes five million shares of preferred stock at a par value of $1.00 per share. At December 31, 2012 and 2011, 15,567 and 16,644 shares of preferred stock were outstanding, respectively. Shares of preferred stock issued and outstanding consist of Series A and B $2.50 cumulative convertible preferred stock, which entitle holders to a cumulative annual cash dividend of $2.50 per share. Each share is convertible at the option of the holder at any time into five shares of common stock. Each share of such preferred stock may be called for redemption by GATX at any time at $63.00 per share. In the event of GATX’s liquidation, dissolution or winding up, the holders of such preferred stock will be entitled to receive $60.00 per share plus accrued and unpaid dividends to the date of payment. At December 31, 2012 and 2011, the aggregated liquidation preference of both series of preferred stocks was $0.9 million and $1.0 million, respectively.

Holders of both preferred and common stock are entitled to one vote for each share held. Except in certain instances, all such classes of stock vote together as a single class.

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Financial Data of Business Segments (Tables)

12 Months Ended

Dec. 31, 2012

Segment Reporting [Abstract]

Segment data

The following tables present certain segment data for the years ended December 31, 2012, 2011 and 2010 (in millions):

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
2012 Profitability
Revenues
Lease revenue	$	713.9		$	161.2		$	4.3		$	37.6		$	—		$	917.0
Marine operating revenue	—			—			239.1			26.4			—			265.5
Other revenue	51.4			6.5			—			2.8			—			60.7
Total Revenues	765.3			167.7			243.4			66.8			—			1,243.2
Expenses
Maintenance expense	201.4			46.6			21.7			—			—			269.7
Marine operating expense	—			—			160.3			22.1			—			182.4
Depreciation	167.7			36.1			11.9			21.7			—			237.4
Operating lease expense	126.5			—			3.8			0.2			(0.3		)	130.2
Other operating expense	18.5			5.1			(0.3		)	0.9			—			24.2
Total Expenses	514.1			87.8			197.4			44.9			(0.3		)	843.9
Other Income (Expense)
Net gain on asset dispositions	58.6			1.7			—			19.2			—			79.5
Interest expense, net	(101.9		)	(24.5		)	(7.1		)	(27.7		)	(5.4		)	(166.6		)
Other (expense) income	(5.1		)	(6.1		)	(1.4		)	3.4			1.0			(8.2		)
Share of affiliates' earnings (pre-tax)	6.5			(18.3		)	—			33.4			—			21.6
Segment profit (loss)	$	209.3		$	32.7		$	37.5		$	50.2		$	(4.1	)	325.6
Selling, general and administrative expense																160.2
Income taxes (including $2.0 million related to affiliates' earnings)																28.1
Net income																$	137.3
Selected Balance Sheet Data
Investments in affiliated companies	$	46.9		$	77.2		$	—		$	377.9		$	—		$	502.0
Identifiable assets	$	3,601.1		$	1,105.8		$	284.2		$	797.4		$	266.9		$	6,055.4
Capital Expenditures
Portfolio investments and capital additions	$	465.9		$	200.1		$	12.6		$	83.5		$	7.9		$	770.0

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
2011 Profitability
Revenues
Lease revenue	$	690.9		$	160.5		$	4.2		$	44.5		$	—		$	900.1
Marine operating revenue	—			—			212.2			17.8			—			230.0
Other revenue	51.5			7.8			—			2.0			—			61.3
Total Revenues	742.4			168.3			216.4			64.3			—			1,191.4
Expenses
Maintenance expense	206.1			52.1			19.4			—			—			277.6
Marine operating expense	—			—			151.7			13.9			—			165.6
Depreciation	162.5			33.6			11.3			19.1			—			226.5
Operating lease expense	130.9			—			—			1.4			(0.3		)	132.0
Other operating expense	18.8			4.2			—			4.3			0.5			27.8
Total Expenses	518.3			89.9			182.4			38.7			0.2			829.5
Other Income (Expense)
Net gain on asset dispositions	52.1			—			1.1			12.6			—			65.8
Interest expense, net	(101.7		)	(25.4		)	(7.7		)	(29.6		)	(4.5		)	(168.9		)
Other (expense) income	(5.7		)	7.2			(0.1		)	2.8			(0.1		)	4.1
Share of affiliates' earnings (pre-tax)	3.9			0.5			—			36.2			—			40.6
Segment profit (loss)	$	172.7		$	60.7		$	27.3		$	47.6		$	(4.8	)	303.5
Selling, general and administrative expense																155.3
Income taxes (including $8.2 million related to affiliates' earnings)																37.4
Net income																$	110.8
Selected Balance Sheet Data
Investments in affiliated companies	$	54.0		$	88.2		$	—		$	371.6		$	—		$	513.8
Identifiable assets	$	3,540.2		$	903.2		$	276.1		$	844.0		$	294.0		$	5,857.5
Capital Expenditures
Portfolio investments and capital additions	$	280.5		$	140.8		$	17.4		$	172.0		$	3.9		$	614.6

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
2010 Profitability
Revenues
Lease revenue	$	671.5		$	141.8		$	4.1		$	43.0		$	—		$	860.4
Marine operating revenue	—			—			185.3			13.1			—			198.4
Other revenue	48.5			5.7			—			1.0			—			55.2
Total Revenues	720.0			147.5			189.4			57.1			—			1,114.0
Expenses
Maintenance expense	205.5			49.8			12.9			—			—			268.2
Marine operating expense	—			—			129.1			8.9			—			138.0
Depreciation	158.6			30.2			10.7			17.5			—			217.0
Operating lease expense	139.1			—			—			1.4			(0.3		)	140.2
Other operating expense	24.2			5.1			—			1.3			0.3			30.9
Total Expenses	527.4			85.1			152.7			29.1			—			794.3
Other Income (Expense)
Net gain on asset dispositions	29.6			(0.6		)	—			12.1			—			41.1
Interest expense, net	(103.8		)	(23.3		)	(8.3		)	(28.2		)	(3.5		)	(167.1		)
Other (expense) income	(5.5		)	(2.0		)	0.2			(0.1		)	7.8			0.4
Share of affiliates' earnings (pre-tax)	7.2			(6.0		)	—			36.9			—			38.1
Segment profit	$	120.1		$	30.5		$	28.6		$	48.7		$	4.3		232.2
Selling, general and administrative expense																134.8
Income taxes (including $9.6 million related to affiliates' earnings)																16.6
Net income																$	80.8
Selected Balance Sheet Data
Investments in affiliated companies	$	59.2		$	81.8		$	—		$	345.1		$	—		$	486.1
Identifiable assets	$	3,226.8		$	1,065.6		$	271.3		$	741.0		$	137.7		$	5,442.4
Capital Expenditures
Portfolio investments and capital additions	$	367.1		$	107.5		$	9.0		$	97.4		$	4.1		$	585.1

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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Income Tax Disclosure [Abstract]

Components of Deferred tax Assets and Liabilities

Significant components of GATX’s deferred tax liabilities and assets as of December 31 were (in millions):

	2012			2011
Deferred Tax Liabilities
Book/tax basis difference due to depreciation	$	806.7		$	756.2
Leveraged leases	—			62.7
Investments in affiliated companies	81.6			82.4
Lease accounting (other than leveraged)	12.6			13.7
Other	3.1			2.9
Total deferred tax liabilities	904.0			917.9
Deferred Tax Assets
Alternative minimum tax credit	5.2			8.9
Federal net operating loss	—			38.1
Foreign tax credit	7.3			13.9
Valuation on foreign tax credit	(7.3		)	(13.9		)
State net operating loss	26.6			31.1
Valuation on state net operating loss	(12.8		)	(15.8		)
Foreign net operating loss	9.5			7.3
Accruals not currently deductible for tax purposes	19.1			21.8
Allowance for losses	6.6			5.4
Pension and post-retirement benefits	48.6			40.7
Other	18.2			14.5
Total deferred tax assets	121.0			152.0
Net deferred tax liabilities	$	783.0		$	765.9

Gross liability for unrecognized tax benefits

A reconciliation of the beginning and ending amount of gross liability for unrecognized tax benefits is as follows (in millions):

	2012			2011
Beginning balance	$	20.8		$	42.7
Reductions due to expiration of the applicable statute of limitations	(16.1		)	—
Reductions due to settlement of audit issues	—			(21.9		)
Ending balance	$	4.7		$	20.8

Income before income taxes

The components of income before income taxes, excluding domestic and foreign joint ventures, for the years ending December 31 consisted of (in millions):

	2012		2011		2010
Domestic	$	80.5	$	39.5	$	5.1
Foreign	63.3		68.1		54.2
	$	143.8	$	107.6	$	59.3

Consolidated federal income taxes

GATX and its U.S. subsidiaries file a consolidated federal income tax return. Income taxes, excluding domestic and foreign joint ventures, for the years ending December 31 consisted of (in millions):

	2012			2011		2010
Current
Domestic:
Federal	$	(8.8	)	$	0.7	$	(0.2	)
State and local	2.5			0.8		0.8
	(6.3		)	1.5		0.6
Foreign	8.0			5.0		5.0
	1.7			6.5		5.6
Deferred
Domestic:
Federal	16.0			8.9		(3.1		)
State and local	(3.1		)	0.5		0.3
	12.9			9.4		(2.8		)
Foreign	11.5			13.3		4.2
	24.4			22.7		1.4
Income taxes	$	26.1		$	29.2	$	7.0

Summary of reasons for difference between GATX's effective income tax rate and federal statutory income tax

The reasons for the difference between GATX’s effective income tax rate and the federal statutory income tax rate for the years ending December 31 were (in millions):

	2012			2011			2010
Income taxes at federal statutory rate	$	50.4		$	37.7		$	20.8
Adjust for effect of:
Foreign tax credits	(13.7		)	(0.1		)	—
Foreign earnings taxed at lower rates	(4.1		)	(6.7		)	(2.7		)
Tax effect of foreign dividends	6.3			—			—
Expiration of the applicable statute of limitations	(15.5		)	—			—
Settlement of audit issues	—			(4.8		)	(9.5		)
Corporate owned life insurance	(0.3		)	(0.2		)	(2.4		)
State income taxes	1.9			1.1			0.1
Other	1.1			2.2			0.7
Income taxes	$	26.1		$	29.2		$	7.0
Effective income tax rate	18.2		%	27.1		%	11.8		%

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Debt (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011
Commercial Paper and Borrowings Under Bank Credit Facilities
Balance	$ 273.6		$ 28.6
Weighted average interest rate	0.72%		1.26%
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	3,281.1		3,498.2
Debt discount, net	(8.3)		(9.3)
Debt adjustment for fair value hedges	10.2		15.3
Total Debt	3,283.0		3,504.2
Recourse Fixed Rate Debt Unsecured One [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Apr. 30, 2009
Final Maturity	May 15, 2014
Fixed Interest Rate	8.75%
Total Debt	300.0		300.0
Recourse Fixed Rate Debt Unsecured Two [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Feb. 05, 2010
Final Maturity	May 15, 2015
Fixed Interest Rate	4.75%
Total Debt	250.0		250.0
Recourse Fixed Rate Debt Unsecured Three [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Nov. 19, 2010
Final Maturity	Jul. 15, 2016
Fixed Interest Rate	3.50%
Total Debt	250.0		250.0
Recourse Fixed Rate Debt Unsecured Four [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	May 27, 2011
Final Maturity	Jun. 01, 2021
Fixed Interest Rate	4.85%
Total Debt	250.0		250.0
Recourse Fixed Rate Debt Unsecured Five [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Jun. 11, 2012
Final Maturity	Jun. 15, 2022
Fixed Interest Rate	4.75%
Total Debt	250.0		0
Recourse Fixed Rate Debt Unsecured Six [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Feb. 06, 2008
Final Maturity	Feb. 15, 2018
Fixed Interest Rate	6.00%
Total Debt	200.0		200.0
Recourse Fixed Rate Debt Unsecured Seven [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Mar. 03, 2006
Final Maturity	Mar. 01, 2016
Fixed Interest Rate	5.80%
Total Debt	200.0		200.0
Recourse Fixed Rate Debt Secured One [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Nov. 06, 2008
Final Maturity	Nov. 15, 2013
Fixed Interest Rate	9.00%
Total Debt	159.9		168.3
Recourse Fixed Rate Debt Unsecured Eight [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Dec. 22, 2005
Final Maturity	Dec. 22, 2015
Fixed Interest Rate	5.75%
Total Debt	100.0		115.0
Recourse Fixed Rate Debt Unsecured Nine [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Sep. 20, 2011
Final Maturity	Jul. 15, 2016
Fixed Interest Rate	3.50%
Total Debt	100.0		100.0
Recourse Fixed Rate Debt Unsecured Ten [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Apr. 14, 2005
Final Maturity	Apr. 15, 2015
Fixed Interest Rate	5.70%
Total Debt	100.0		100.0
Recourse Fixed Rate Debt Unsecured Eleven [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Sep. 20, 2011
Final Maturity	Jun. 01, 2021
Fixed Interest Rate	4.85%
Total Debt	50.0		50.0
Recourse Fixed Rate Debt Unsecured Twelve [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Dec. 27, 2010
Final Maturity	Oct. 31, 2018
Fixed Interest Rate	3.84%
Total Debt	21.1		20.7
Recourse Fixed Rate Debt Unsecured Thirteen [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Nov. 29, 2010
Final Maturity	Nov. 30, 2018
Fixed Interest Rate	3.70%
Total Debt	19.8		20.7
Recourse Fixed Rate Debt Unsecured Fourteen [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Sep. 24, 2009
Final Maturity	Oct. 01, 2012
Fixed Interest Rate	4.75%
Total Debt	0		300.0
Recourse Fixed Rate Debt Unsecured Fifteen [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Oct. 11, 2006
Final Maturity	Feb. 15, 2012
Fixed Interest Rate	5.50%
Total Debt	0		200.0
Recourse Fixed Rate Debt Unsecured Sixteen [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Mar. 29, 2006
Final Maturity	Dec. 11, 2012
Fixed Interest Rate	3.49%
Total Debt	0		40.5
Recourse Fixed Rate Debt Unsecured Seventeen [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Dec. 18, 2007
Final Maturity	Nov. 30, 2012
Fixed Interest Rate	4.70%
Total Debt	0		27.2
Recourse Fixed Rate Debt Unsecured Eighteen [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Jun. 29, 2007
Final Maturity	May 31, 2012
Fixed Interest Rate	4.25%
Total Debt	0		22.7
Recourse Fixed Rate Debt Unsecured Nineteen [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Feb. 11, 2002
Final Maturity	Jul. 31, 2012
Fixed Interest Rate	5.73%
Total Debt	0		0.6
Recourse Fixed Rate Debt Unsecured Twenty [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Feb. 11, 2002
Final Maturity	Jan. 31, 2012
Fixed Interest Rate	5.83%
Total Debt	0		0.2
Recourse Fixed Rate Debt [Member]
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	2,250.8		2,615.9
Recourse Floating Rate Debt Unsecured One [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Dec. 12, 2011	[1]
Final Maturity	Jun. 12, 2017	[1]
Floating Interest Rate	2.25%	[1]
Total Debt	107.5	[1]	115.0	[1]
Recourse Floating Rate Debt Unsecured Two [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Mar. 18, 2008	[1]
Final Maturity	Mar. 18, 2014	[1]
Floating Interest Rate	1.25%	[1]
Total Debt	100.0	[1]	150.0	[1]
Recourse Floating Rate Debt Unsecured Three [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	May 17, 2011	[1]
Final Maturity	May 17, 2013	[1]
Floating Interest Rate	1.50%	[1]
Total Debt	100.0	[1]	100.0	[1]
Recourse Floating Rate Debt Unsecured Four [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Dec. 21, 2012	[1]
Final Maturity	Dec. 21, 2017	[1]
Floating Interest Rate	1.88%	[1]
Total Debt	100.0	[1]	0	[1]
Recourse Floating Rate Debt Secured One [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Dec. 19, 2011	[1]
Final Maturity	Dec. 19, 2020	[1]
Floating Interest Rate	2.10%	[1]
Total Debt	95.5	[1]	100.0	[1]
Recourse Floating Rate Debt Unsecured Five [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Jun. 30, 2006	[1]
Final Maturity	Jun. 28, 2013	[1]
Floating Interest Rate	0.90%	[1]
Total Debt	70.0	[1]	100.0	[1]
Recourse Floating Rate Debt Unsecured Six [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Aug. 31, 2012	[1]
Final Maturity	Dec. 31, 2019	[1]
Floating Interest Rate	2.47%	[1]
Total Debt	66.0	[1]	0	[1]
Recourse Floating Rate Debt Unsecured Seven [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Dec. 15, 2010	[1]
Final Maturity	Oct. 31, 2015	[1]
Floating Interest Rate	1.58%	[1]
Total Debt	42.9	[1]	49.9	[1]
Recourse Floating Rate Debt Unsecured Eight [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Mar. 29, 2006	[1]
Final Maturity	Sep. 30, 2016	[1]
Floating Interest Rate	2.09%	[1]
Total Debt	41.2	[1]	0	[1]
Recourse Floating Rate Debt Secured Two [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	May 14, 2009	[1]
Final Maturity	May 14, 2014	[1]
Floating Interest Rate	2.86%	[1]
Total Debt	38.0	[1]	41.4	[1]
Recourse Floating Rate Debt Unsecured Nine [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Jan. 12, 2012	[1]
Final Maturity	Jun. 12, 2017	[1]
Floating Interest Rate	2.25%	[1]
Total Debt	35.0	[1]	0	[1]
Recourse Floating Rate Debt Unsecured Ten [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Dec. 18, 2007	[1]
Final Maturity	Oct. 31, 2016	[1]
Floating Interest Rate	2.01%	[1]
Total Debt	27.7	[1]	0	[1]
Recourse Floating Rate Debt Unsecured Eleven [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Dec. 06, 2011	[1]
Final Maturity	Aug. 31, 2016	[1]
Floating Interest Rate	1.56%	[1]
Total Debt	25.8	[1]	29.8	[1]
Recourse Floating Rate Debt Unsecured Twelve [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Jun. 29, 2007	[1]
Final Maturity	Sep. 30, 2016	[1]
Floating Interest Rate	2.17%	[1]
Total Debt	18.4	[1]	0	[1]
Recourse Floating Rate Debt Unsecured Thirteen [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Sep. 02, 2011	[1]
Final Maturity	Nov. 30, 2016	[1]
Floating Interest Rate	1.24%	[1]
Total Debt	13.4	[1]	15.6	[1]
Recourse Floating Rate Debt Unsecured Fourteen [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Mar. 01, 2010	[1]
Final Maturity	Feb. 28, 2015	[1]
Floating Interest Rate	1.97%	[1]
Total Debt	13.2	[1]	13.0	[1]
Recourse Floating Rate Debt Unsecured Fifteen [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Dec. 31, 2003	[1]
Final Maturity	Sep. 30, 2013	[1]
Floating Interest Rate	1.73%	[1]
Total Debt	1.8	[1]	4.3	[1]
Recourse Floating Rate Debt Unsecured Sixteen [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Dec. 27, 2010	[1]
Final Maturity	Jun. 30, 2012	[1]
Floating Interest Rate	2.84%	[1]
Total Debt	0	[1]	5.2	[1]
Recourse Floating Rate Debt Unsecured Seventeen [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Nov. 29, 2010	[1]
Final Maturity	Dec. 31, 2012	[1]
Floating Interest Rate	2.20%	[1]
Total Debt	0	[1]	1.9	[1]
Recourse Floating Rate Debt Unsecured Eighteen [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Dec. 15, 2003	[1]
Final Maturity	Dec. 15, 2012	[1]
Floating Interest Rate	1.63%	[1]
Total Debt	0	[1]	1.2	[1]
Recourse Floating Rate Debt Unsecured Nineteen [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Dec. 31, 2003	[1]
Final Maturity	Dec. 31, 2012	[1]
Floating Interest Rate	1.53%	[1]
Total Debt	0	[1]	0.3	[1]
Total Recourse Floating Rate Debt [Member]
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	896.4	[1]	727.6	[1]
Nonrecourse Fixed Rate Debt Secured One Member
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Sep. 30, 1997
Final Maturity	Sep. 20, 2016
Fixed Interest Rate	6.69%
Total Debt	35.1		45.2
Nonrecourse Fixed Rate Debt Secured Two [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Jun. 13, 2006
Final Maturity	Dec. 31, 2013
Fixed Interest Rate	6.26%
Total Debt	21.4		22.2
Nonrecourse Fixed Rate Debt Secured Three [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Aug. 01, 2007
Final Maturity	Jun. 30, 2017
Fixed Interest Rate	6.77%
Total Debt	2.5		2.5
Nonrecourse Fixed Rate Debt Secured Four [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Jun. 16, 2006
Final Maturity	Apr. 29, 2016
Fixed Interest Rate	6.80%
Total Debt	1.3		1.3
Nonrecourse Fixed Rate Debt Secured Five [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Aug. 01, 2007
Final Maturity	Jul. 31, 2017
Fixed Interest Rate	6.78%
Total Debt	0.8		0.8
Nonrecourse Fixed Rate Debt Secured Six [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	May 29, 2007
Final Maturity	May 31, 2012
Fixed Interest Rate	5.84%
Total Debt	0		3.5
Nonrecourse Fixed Rate Debt Secured Seven [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	Jun. 01, 2007
Final Maturity	May 31, 2012
Fixed Interest Rate	6.27%
Total Debt	0		2.4
Nonrecourse Fixed Rate Debt Secured Eight [Member]
Outstanding balances of debt obligations and the applicable interest rates
Date of Issue	May 11, 2007
Final Maturity	May 31, 2012
Fixed Interest Rate	6.06%
Total Debt	0		1.4
Total Nonrecourse Fixed Rate Debt [Member]
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	61.1		79.3
Nonrecourse Floating Rate Debt Secured One [Member]
Outstanding balances of debt obligations and the applicable interest rates
Final Maturity	May 08, 2014	[1]
Floating Interest Rate	1.46%	[1]
Total Debt	49.3	[1]	51.0	[1]
Nonrecourse Floating Rate Debt Secured Two [Member]
Outstanding balances of debt obligations and the applicable interest rates
Final Maturity	Jan. 15, 2015	[1]
Floating Interest Rate	1.46%	[1]
Total Debt	23.5	[1]	24.4	[1]
Total Nonrecourse Floating Rate Debt [Member]
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	$ 72.8	[1]	$ 75.4	[1]

[1] Floating rates as of December 31, 2012.

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Share Based Compensation (Details 1) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Data With Respect to Stock Options/SARs Activity
Outstanding Number of Option at beginning of the year	1,879
Number of Options, Granted	350
Number of Options, Exercised	(341)
Number of Options, Forfeited/Cancelled	(10)
Number of Options, Expired	(6)
Outstanding Number of Options at end of the year	1,872
Number of Options Vested and exercisable at end of the year	1,146
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding Weighted Average Exercise Price at beginning of the year	$ 31.08
Weighted Average Exercise Price, Granted	$ 43.99
Weighted Average Price, Exercised	$ 28.99
Weighted Average Price, Forfeited/Cancelled	$ 37.15
Weighted Average Price, Expired	$ 38.95
Outstanding Weighted Average Exercise Price at end of the year	$ 33.82
Weighted Average Price, Vested and exercisable at end of the year	$ 31.48
Outstanding, Weighted Average Remaining Contractual Term at end of the year	3 years 8 months 12 days
Weighted Average Remaining Contractual Term of Option Vested and exercisable at end of the year	2 years 7 months 6 days
Total intrinsic value of options/SARs exercised	$ 4.9
Total Intrinsic Value of Outstanding Option at end of the year	18.0
Total Intrinsic Value of Option, Vested and exercisable at end of the year	$ 13.8

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Variable Interest Entities (Tables)

12 Months Ended

Dec. 31, 2012

Variable Interest Entity, Not Primary Beneficiary, Disclosures [Abstract]

Carrying amounts of assets and liabilities of consolidated VIE

The carrying amounts of assets and liabilities of the VIE as of December 31 were (in millions):

	2012		2011
Operating assets, net of accumulated depreciation *	$	98.4	$	104.3
Nonrecourse debt	35.1		45.2

_________

(*) All operating assets are pledged as collateral on the nonrecourse debt.

Carrying amounts and maximum exposure to loss for non consolidated VIEs

The carrying amounts and maximum exposure to loss with respect to VIEs that GATX does not consolidate as of December 31 were (in millions):

	2012				2011
	Net Carrying Amount		Maximum Exposure to Loss		Net Carrying Amount		Maximum Exposure to Loss
Investments in affiliates	$	110.7	$	110.7	$	72.2	$	72.2
Leveraged leases	—		—		78.5		78.5
Other investment	0.7		0.7		0.9		0.9
Total	$	111.4	$	111.4	$	151.6	$	151.6

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Description of Business (Details)	12 Months Ended
	Dec. 31, 2012 Segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of business segments	4

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Investments in Affiliated Companies (Operating Results, Affiliates) (Details 5) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating results for all affiliated companies of GATX
Revenues	$ 651.8	$ 645.5	$ 636.2
Gains on sales of assets	57.4	21.1	10.9
Equity Method Investment, Summarized Financial Information, Net Income (Loss)	$ 75.3	$ 88.5	$ 55.8

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Allowance for Losses (Details Textual) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Allowance for Losses (Textual) [Abstract]
Allowances for trade receivables	$ 4.6	$ 11.8	$ 11.6
Allowance for Trade Receivables [Member]
Allowance for Losses (Textual) [Abstract]
Allowances for trade receivables	3.4	2.8
Allowances for trade receivables as percentage of rent and other receivables	3.90%	3.70%
Allowance for Finance Leases [Member]
Allowance for Losses (Textual) [Abstract]
Allowances for trade receivables	$ 1.2	$ 9.0

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Leases (Details 3) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Capital Leases
2013, Capital Leases	$ 3.1
2014, Capital Leases	3.1
2015, Capital Leases	3.1
2016, Capital Leases	2.7
2017, Capital Leases	1.1
Years thereafter, Capital Leases	0
Capital Leases, Future Minimum Payments Due, Total	13.1
Less: amounts representing interest	(1.8)
Present value of future minimum capital lease payments	11.3		14.3
Recourse Operating Leases [Member]
Operating Leases
2013, Operating Lease	115.3	[1]
2014, Operating Lease	119.7	[1]
2015, Operating Lease	139.7	[1]
2016, Operating Lease	101.5	[1]
2017, Operating Lease	89.3	[1]
Years thereafter, Operating Leases	417.4	[1]
Total, Operating Leases	982.9	[1]
Nonrecourse Operating Leases [Member]
Operating Leases
2013, Operating Lease	27.9	[2]
2014, Operating Lease	27.4	[2]
2015, Operating Lease	26.0	[2]
2016, Operating Lease	21.9	[2]
2017, Operating Lease	22.5	[2]
Years thereafter, Operating Leases	75.3	[2]
Total, Operating Leases	$ 201.0	[2]

[1] The contractual rental payments do not include the costs of licenses, taxes, insurance, and maintenance, for which GATX is required to pay.

[2] The amounts shown for nonrecourse operating leases primarily reflect the rental payments of two wholly-owned bankruptcy-remote, SPCs. These rentals are consolidated for accounting purposes, but do not represent legal obligations of GATX.

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Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2012

Stockholders' Equity Note [Abstract]

Common stock reserved for conversion and incentive plans

The following shares of common stock were reserved as of December 31, 2012:

	Shares  (in millions)
Conversion of outstanding preferred stock	0.1
Share-based compensation award plans	6.5
	6.6

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Significant Accounting Policies

12 Months Ended

Dec. 31, 2012

Accounting Policies [Abstract]

Significant Accounting Policies

Significant Accounting Policies

Basis of Presentation — The accompanying consolidated financial statements were prepared in accordance with United States generally accepted accounting principles (“GAAP”).

Use of Estimates — The preparation of these financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements. The Company regularly evaluates its estimates and judgments based on historical experience and other relevant facts and circumstances. Actual amounts could differ from those estimates.

Correction of Misstatement — During the first quarter of 2010, the Company discovered a clerical error in the preparation of its consolidated balance sheet as of December 31, 2009, and consolidated statement of cash flows for the year ended December 31, 2009. The error resulted in a $13.1 million overstatement in each of cash and cash equivalents; accounts payable and accrued expenses; and net cash provided by operating activities. Management determined that the effect of this error was immaterial and adjusted its consolidated balance sheet and consolidated statement of cash flows in 2010 to correct this error.

Reclassification — Certain amounts reported in the 2011 and 2010 financial statements have been reclassified to conform to the 2012 presentation. In particular, GATX changed the presentation of certain items reported on its Statement of Comprehensive Income. Specifically:

• Asset remarketing income and scrapping gains were removed from revenue and asset impairments were removed from other expense. These amounts have been aggregated and included as a separate line item entitled net gain (loss) on asset dispositions.

• Share of affiliates' earnings was formerly presented as a pre-tax line item and was combined with revenue in the gross income line. These earnings are now presented on a net-of-tax basis after the subtotal "Income before Income Taxes and Share of Affiliates' Earnings".

• Operating revenues relating to Portfolio Management owned vessels are reported as marine operating revenues. Previously they were treated as usage rents and recorded with lease income. The related marine operating expenses, which were previously reported as other expenses, are now reported as marine operating expenses.

Consolidation — The consolidated financial statements of GATX Corporation and Subsidiaries include the assets, liabilities, revenues and expenses of GATX, all majority-owned subsidiaries that the Company controls and variable interest entities (“VIEs”) for which the Company is the primary beneficiary. Intercompany transactions and balances have been eliminated. GATX's consolidated subsidiaries include the following special-purpose corporations engaged in the financing of railcars, General American Railcar Corporation, General American Railcar Corporation II, General American Railcar Corporation III, General American Marks Company and GARC LLC (collectively the "SPCs"). The obligations of the SPCs are nonrecourse to GATX and their assets are available first to satisfy claims of their creditors. 

Variable Interest Entities — GATX evaluates whether an entity is a VIE based on the sufficiency of the entity’s equity and whether the equity holders have the characteristics of a controlling financial interest. To determine if it is the primary beneficiary of a VIE, GATX assesses whether it has the power to direct the activities that most significantly impact the economic performance of the VIE and the obligation to absorb losses or the right to receive benefits that may be significant to the VIE. These determinations are both qualitative and quantitative, and they require management to make judgments and assumptions about the VIE’s forecasted financial performance and the volatility inherent in those forecasted results. GATX evaluates new investments for VIE determination and regularly reviews all existing entities for events that may result in an entity becoming a VIE or GATX becoming the primary beneficiary of an existing VIE. See Note 7 for additional information.

Investments in Affiliated Companies —Investments in joint ventures and other non-controlled entities are accounted for using the equity method when it is determined that GATX has the ability to exercise significant influence over the financial and operating policies of the investee. Under the equity method, initial investments are recorded at cost and then adjusted for GATX’s share of the affiliates’ undistributed earnings and losses, distributions of capital, and loan payments to or from the affiliate. Loans to and from affiliates are reflected as part of GATX’s investment in the affiliate and interest on these loans is included in GATX’s proportional share of the affiliates’ earnings. GATX reviews the carrying amount of its investments in affiliates annually, or whenever events or circumstances indicate that a decline in value may have occurred. If GATX determines an investment is impaired on an other-than-temporary basis, it records a loss equal to the difference between the fair value of the investment and its carrying value. See Note 6 for additional information.

Fair Value Measurements —As defined by GAAP, fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value measurements are classified according to a three-level hierarchy based on management’s judgment about the reliability of the inputs used in the fair value measurement. Level 1 inputs are quoted prices available in active markets for identical assets or liabilities. Level 2 inputs are observable, either directly or indirectly, and include quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3 inputs are unobservable, meaning they are supported by little or no market activity. Fair value measurements classified as Level 3 typically rely on the use of pricing models and discounted cash flow methodologies where significant management judgment is required. See Note 9 for additional information.

Cash and Cash Equivalents — All highly liquid investments with a maturity of three months or less when purchased are classified as cash equivalents.

Restricted Cash — Cash and cash equivalents that are restricted as to withdrawal and use. GATX’s restricted cash primarily relates to contractually required amounts maintained for six wholly-owned bankruptcy-remote, special-purpose corporations.

Loans — GATX records loans at the principal amount outstanding plus accrued interest. The loan portfolio is reviewed regularly and a loan is classified as impaired when it is probable that GATX will be unable to collect all amounts due under the loan agreement. Since most loans are collateralized, impairment is generally measured as the amount by which the carrying value of the loan exceeds expected repayments plus the fair value of the underlying collateral. Generally, interest income is not recognized on impaired loans until the loan has been paid up to contractually current status or as conditions warrant.

Operating Assets and Facilities — Operating assets and facilities are principally stated at cost plus capitalized improvements. Assets acquired under capital leases are included in operating assets, and the related obligations are recorded as liabilities. Operating assets and facilities are depreciated over their estimated useful lives or lease terms to estimated residual values using the straight-line method. Leasehold improvements are depreciated over the shorter of their useful lives or the lease term. The estimated depreciable lives of operating assets and facilities are as follows:

Railcars	30 — 38 years
Locomotives	10 — 20 years
Buildings	40 — 50 years
Leasehold improvements	5 — 15 years
Marine vessels	30 — 65 years
Other equipment	5 — 30 years

GATX reviews long-lived assets, such as operating assets and facilities, for impairment whenever events or circumstances indicate that the carrying amount of such assets may not be recoverable. Recoverability of assets to be held and used is evaluated by comparing the carrying amount of the asset to the undiscounted future net cash flows GATX expects the asset to generate. If GATX determines an asset is impaired, it recognizes an impairment loss equal to the excess of the carrying amount over the asset’s fair value. Assets to be disposed of that meet specified accounting criteria are classified as held for sale and recorded at the lower of their carrying amount or fair value less costs to sell.

Lease Classification — GATX determines the classification of a lease at its inception. If the provisions of the lease subsequently change, other than by renewal or extension, GATX evaluates if that change would have resulted in a different classification had the change been in effect at inception. If so, the revised agreement is considered a new lease for lease classification purposes. See Note 5 for additional information.

Finance Leases — Finance leases include direct finance leases and leveraged leases. Direct finance leases consist of a gross lease payment receivable and an estimated residual value of the leased equipment at the lease termination date, net of unearned income. Lease payment receivables represent the rent GATX will receive over the remainder of the lease term. Initial unearned income is the amount by which the sum of the original lease payment receivable and the estimated residual value exceeds the original cost or carrying value of the underlying equipment. GATX amortizes unearned income to lease income over the lease term in a manner that produces a constant rate of return on the net investment in the lease. Finance leases that are mainly financed at inception with nonrecourse borrowings and that meet certain criteria are accounted for as leveraged leases. Leveraged lease receivables are stated net of related nonrecourse debt. Initial unearned income for leveraged leases is the excess of anticipated cash flows (including estimated residual values and net of the related debt service) over the original investment in the lease. See Note 5 for additional information.

GATX regularly reviews the performance of the finance lease portfolio and classifies finance leases as non-performing if it is probable that GATX will be unable to collect all amounts due under the lease. GATX suspends the accrual of income on non-performing finance leases until all contractual payments are current or as conditions warrant. Payments received on non-performing finance leases are applied to the lease payment receivable.

Residual Values — Residual values are a component of GATX’s investment in finance leases. Residual values are the estimated value of an asset at the end of a finance lease contract. GATX reviews its estimates of residual value annually or whenever events or circumstances indicate that residual values may have declined. Other-than-temporary declines in value are recognized as impairments.

Inventory — GATX’s inventory consists of railcar and locomotive repair components and marine vessel spare parts. All inventory balances are stated at lower of cost or market. Railcar repair components are valued using the average cost method. Vessel spare parts inventory is valued using the first-in, first-out method. Inventory is included in other assets on the balance sheet.

Goodwill — GATX recognizes goodwill when the purchase price of an acquired business exceeds the fair value of the acquired net assets and assigns the goodwill to the same reporting unit as the net assets of the acquired business. GATX’s reporting units are based on the composition of its operating segments, taking into consideration whether the operating segments consist of multiple businesses and, if so, whether the businesses operate in different economic environments. Goodwill is tested annually for impairment by comparing the fair value of the reporting unit with its carrying amount, including goodwill. If the fair value of the reporting unit exceeds its carrying amount, then the goodwill of the reporting unit is not considered impaired. If the carrying amount of the reporting unit exceeds its fair value, GATX compares the implied fair value of the reporting unit’s goodwill (the reporting unit fair value less its carrying amount, excluding goodwill) with the carrying amount of the goodwill. An impairment loss is recorded in the amount that the carrying amount of goodwill exceeds its implied fair value. Reporting unit fair values are primarily estimated using discounted cash flow models. GATX performs its impairment test annually, in the fourth quarter, or in interim periods if events or circumstances indicate a potential impairment. See Note 16 for additional information.

Allowance for Losses — The allowance for losses is an estimate of credit losses existing in reservable assets. Reservable assets are divided into two categories: rent and other receivables, which includes short-term trade billings, and loans and finance lease receivables. GATX bases loss reserves for rent and other receivables on historical loss experience and judgments about the impact of economic conditions, the state of the markets GATX operates in and collateral values. In addition, GATX may establish specific reserves for known troubled accounts. Reserve estimates for loans and finance lease receivables are generally evaluated on a customer-specific basis, considering the same factors as rent and other receivables as well as a regular assessment of each customer’s specific credit situation. Amounts are charged against the allowance when they are deemed to be uncollectable. There were no material changes in estimation methods or assumptions for the allowance during 2012. GATX believes that the allowance is adequate to cover losses inherent in its reservable assets as of December 31, 2012. Since the allowance is based on judgments and estimates, it is possible that actual losses incurred will differ from the estimate. See Note 17 for additional information.

Income Taxes — Provisions for federal, state and foreign income taxes are calculated on reported income before income taxes. Calculations of deferred tax assets and liabilities are based on the differences between the financial statement and tax bases of assets and liabilities, using enacted rates in effect for the year the differences are expected to reverse. The cumulative effect of any changes in tax rates from those previously used in determining deferred tax assets and liabilities is reflected in the provision for income taxes in the period of change. Provisions for income taxes in any given period differ from those currently payable or receivable because certain items of income and expense are recognized in different periods for financial reporting purposes than for income tax purposes. Uncertain tax positions are items deducted for tax purposes, but for which a tax benefit has not been recognized in the financial statements due to the uncertainty of the tax position. GATX’s liability for uncertain tax positions is included in other liabilities on the balance sheet. See Note 12 for additional information.

Derivatives — GATX recognizes all derivative instruments at fair value and classifies them on the balance sheet as either other assets or other liabilities. Classification of derivative activity in the statements of comprehensive income and cash flows is generally determined by the nature of the hedged item. Gains and losses on derivatives that are not accounted for as hedges are classified as other expenses and the related cash flows are included in cash flows from operating activities.

Derivatives that meet specific accounting criteria are formally designated as qualifying hedges at inception. These criteria require that the derivative is expected to be highly effective at offsetting changes in the fair value or expected cash flows of the hedged exposure both at the inception of the hedging relationship and on an ongoing basis. GATX primarily uses derivatives, such as interest rate swap agreements, Treasury rate locks, options and currency forwards, to hedge its exposure to interest rate and foreign currency exchange rate risk on existing and anticipated transactions. For derivatives designated as fair value hedges, changes in the fair value of both the derivative and the hedged item are recognized in earnings. For derivatives designated as cash flow hedges, the effective portion of the change in the fair value of the derivative is recorded as part of other comprehensive income (loss) and recognized in earnings in the period the hedged transaction affects earnings. Any ineffective portion of the change in the fair value of the derivative is immediately recognized in earnings. Although GATX does not hold or issue derivative financial instruments for purposes other than hedging, certain derivatives are not designated as accounting hedges. Changes in the fair value of these derivatives are recognized in earnings immediately. See Note 9 for additional information.

Defined Benefit Pension and Other Post-Retirement Plans —GATX’s balance sheet reflects the funded status of its pension and post-retirement plans. The funded status of the plans is measured as the difference between the fair value of the plan assets and the projected benefit obligation. GATX recognizes the aggregate overfunding of any plans in other assets, the aggregate underfunding of any plans in other liabilities and the corresponding adjustments to other comprehensive income (loss), net of related taxes.

Foreign Currency — The assets and liabilities of GATX’s operations having non-U.S. dollar functional currencies are translated at exchange rates in effect at year end. Income, expenses and cash flows are translated monthly, using average exchange rates. Gains and losses resulting from the translation of foreign currency financial statements are deferred and recorded as a separate component of other comprehensive income (loss). Gains (losses) resulting from foreign currency transactions and from the remeasurement of non-functional currency denominated assets and liabilities, which are recorded net of related hedges in other expense during the periods in which they occur, were $0.5 million, $(1.6) million and $(1.7) million for 2012, 2011 and 2010, respectively.

Environmental Liabilities — GATX records reserves for environmental remediation costs at sites relating to past and/or discontinued operations when they are probable and a reasonable estimate of the expected costs can be made. Adjustments to initial estimates are recorded when necessary. Since reserves are based on estimates, actual environmental remediation costs may differ. Environmental remediation costs that relate to current or future operations are expensed or capitalized as appropriate. See Note 22 for additional information.

Lease Revenue — Lease revenue includes revenue from full-service and net operating leases, and direct finance leases. Full-service leases are priced as an integrated service that includes amounts related to executory costs (e.g., maintenance, insurance and ad valorem taxes). GATX does not offer stand-alone maintenance service contracts and is unable to separate executory costs from full service lease income based on observable data. Operating lease revenue, including amounts related to executory costs, is recognized on a straight-line basis over the term of the underlying lease. As a result, lease revenue may not be recognized in the same period as maintenance and other executory costs, which are expensed as incurred. Finance lease income is recognized using the interest method, which produces a constant yield over the term of the lease. See Note 5 for additional information.

Marine Operating Revenue —Marine operating revenue is recognized as shipping services are performed and revenue is allocated among reporting periods based on the relative transit time in each reporting period for shipments in process at any month end.

Other Revenue — Other revenue includes customer liability repair revenue, fee income, interest on loans and other miscellaneous revenues. These revenues are recognized when earned, which, in the case of management fees received from affiliates, is when services are performed.

Interest Expense, net — Interest expense is the interest accrued on indebtedness and amortization of debt issuance costs and debt discounts. Debt issuance costs and discounts are deferred and amortized over the applicable term of the related debt. Interest expense is reported net of interest income on bank deposits, which was $1.9 million, $0.7 million and $0.2 million for 2012, 2011 and 2010, respectively.

Operating Lease Expense — GATX leases certain railcars and other assets and facilities closely associated with its revenue generating operations, such as maintenance facilities and equipment. These leases are classified as operating leases and the associated lease expense is recorded on a straight-line basis. Gains and financing costs associated with sale-leasebacks are deferred and amortized as a component of operating lease expense over the related leaseback term. GATX’s leases of office facilities and related administrative assets are also classified as operating leases and the associated expense is recorded in selling, general, and administrative expense (“SG&A”). Total operating lease expense, which includes amounts recorded in SG&A, was $133.3 million, $137.3 million and $145.4 million, in 2012, 2011 and 2010, respectively. See Note 5 for additional information.

Lease and Loan Origination Costs — Initial direct costs of direct finance leases are deferred and amortized over the lease term as an adjustment to lease income. Loan origination fees and related direct loan origination costs for a given loan are offset, and the net amount is deferred and amortized over the term of the loan as an adjustment to interest income.

Maintenance and Repair Costs — Maintenance and repair costs are expensed as incurred. Costs incurred in connection with planned major maintenance activities that improve or extend the useful life of an asset are capitalized and depreciated over their estimated useful life. Required regulatory survey costs for vessels are capitalized and amortized over the applicable survey period, which is generally five years.

ASC Expense Seasonality — ASC's sailing season runs from April 1 - December 31 of each year.  Certain indirect expenses incurred prior to the beginning of the sailing season, including winter maintenance, insurance, operating lease expense and depreciation, are deferred and amortized ratably over the sailing season.  Otherwise, expenses are recognized as incurred.

Share-Based Compensation — GATX measures share-based compensation expense based on the grant date fair value of an award and recognizes the expense net of estimated forfeitures over the requisite service period of each award. Forfeiture rates are estimated at the grant date based on historical experience and adjusted in subsequent periods for differences in actual forfeitures from those estimates. See Note 11 for additional information.

Net Gain on Asset Dispositions — Net gain on asset dispositions consists of disposition gains on sales of operating assets and residual sharing income ("asset remarketing income"), non-remarketing disposition gains, and asset impairments. Disposition gains, including non-remarketing gains, are recognized upon completion of the sale or scrapping of operating assets. Residual sharing income includes fees received from sale of managed assets and assets subject to residual value guarantees, and are recognized upon completion of the underlying transactions.

The following table presents the net gain on asset dispositions for the year ended (in millions) :

	2012			2011			2010
Disposition gains	$	42.7		$	40.4		$	23.8
Residual sharing income	22.6			5.2			7.6
Non-remarketing disposition gains	19.2			27.0			18.0
Asset impairments	(5.0		)	(6.8		)	(8.3		)
Net Gain on Asset Dispositions	$	79.5		$	65.8		$	41.1

Other Income (Expense) —Other income and expense includes fair value adjustments, gains and/or losses on foreign currency transactions and remeasurements, legal defense costs and litigation settlements, along with other miscellaneous income and expense items.

New Accounting Pronouncements

Accumulated Other Comprehensive Income - In January 2013, the FASB issued authoritative accounting guidance that requires presentation and disclosure of the effects on components of net income of significant amounts reclassified out of accumulated other comprehensive income. The guidance becomes effective for periods beginning after December 31, 2012, with early adoption permitted. Application of the new guidance will not impact GATX's financial position, results of operations or cash flows.

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Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance, Foreign Currency Translation Gain (Loss)	$ 6.4	$ 46.0	$ 74.4
Change in Foreign Currency Translation Gain (Loss)	25.0	(41.2)	(28.4)
Foreign currency translation gain loss before reclassification adjustment into earnings	0	1.6	0
Foreign Currency Translation Gain (Loss), Income tax effect	0	0	0
Ending Balance, Foreign Currency Translation Gain (Loss)	31.4	6.4	46.0
Beginning Balance, Unrealized Gain (Loss) on Securities	(0.6)	(0.4)	(1.7)
Change in Unrealized Gain (Loss) on Securities	0.5	(1.2)	1.4
Unrealized Gain (Loss) on Securities, Reclassification adjustments into earnings	(0.4)	0.9	0
Unrealized Gain (Loss) on Securities, Income tax effect	0.1	0.1	(0.1)
Ending Balance, Unrealized Gain (Loss) on Securities	(0.4)	(0.6)	(0.4)
Beginning Balance, Unrealized Loss on Derivative Instruments	(56.2)	(55.7)	(52.2)
Change in Unrealized Loss on Derivative Instruments	6.2	(6.6)	(12.2)
Unrealized Loss on Derivative Instruments, Reclassification adjustments into earnings	6.5	4.0	9.2
Unrealized Loss on Derivative Instruments, Income tax effect	(1.0)	2.1	(0.5)
Ending Balance, Unrealized Loss on Derivative Instruments	(44.5)	(56.2)	(55.7)
Beginning Balance, Post-Retirement Benefit Plans	(118.7)	(99.9)	(105.0)
Change in Post-Retirement Benefit Plans	(28.8)	(36.0)	3.7
Post-Retirement Benefit Plans, Reclassification adjustments into earnings	8.7	5.8	4.5
Post-Retirement Benefit Plans, Income tax effect	7.7	11.4	(3.1)
Ending Balance, Post-Retirement Benefit Plans	(131.1)	(118.7)	(99.9)
Other Comprehensive Income Change in Component	2.9	(85.0)	(35.5)
Reclassification adjustments into earnings, Total	14.8	12.3	13.7
Income tax effect, Total	6.8	13.6	(3.7)
Accumulated other comprehensive income (loss), net of tax	$ (144.6)	$ (169.1)	$ (110.0)	$ (84.5)

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Leases (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 Corporations	Dec. 31, 2011	Dec. 31, 2010
Leases (Textual) [Abstract]
Income from leveraged leases, net of taxes	$ 0.2	$ 4.6	$ 1.5
Rental income from usage rents	18.2	13.7	11.8
Deferred initial direct costs of direct financial leases	$ 0.8	$ 0.9
Number of corporations	2

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Commercial Commitments (Tables)

12 Months Ended

Dec. 31, 2011

Guarantees [Abstract]

Commercial Commitments

The following table shows GATX’s commercial commitments as of December 31 (in millions):

	2012		2011
Affiliate guarantees	$	42.0	$	42.0
Asset residual value guarantees	11.2		33.9
Lease payment guarantees	41.0		47.0
Performance bonds	0.6		1.3
Standby letters of credit	9.7		9.8
Total commercial commitments *	$	104.5	$	134.0

__________________

(*) At December 31, 2012, the carrying value of liabilities on the balance sheet for commercial commitments was $6.4 million. The expirations of these commitments range from 2013 to 2022. GATX is not aware of any event that would require it to satisfy any of these commitments.

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Financial Data of Business Segments

12 Months Ended

Dec. 31, 2012

Segment Reporting [Abstract]

Financial Data of Business Segments

Financial Data of Business Segments

The financial data presented below depicts the profitability, financial position and capital expenditures of each of GATX’s business segments.

Headquartered in Chicago, Illinois, GATX Corporation (“GATX” or the “Company”) leases, operates, manages and remarkets long-lived, widely-used assets, primarily in the rail and marine markets. GATX also invests in joint ventures that complement existing business activities. In 2012, the Company modified the composition of its reportable segments to reflect an increasing focus on international growth and related changes in its management structure. As a result, the Company now reports financial results through fourprimary business segments: Rail North America, Rail International, American Steamship Company (“ASC”) and Portfolio Management. In 2012, GATX disaggregated Rail North America from other international railcar leasing operations to better reflect GATX's increasing focus on international rail growth and recent changes to its management structure. Segment disclosures for all years are presented on this basis.

Rail North America is comprised of GATX's wholly-owned operations in the United States, Canada and Mexico, as well as two affiliate investments. Rail North America primarily provides railcars pursuant to full-service leases under which it maintains the railcars, pays ad valorem taxes and insurance and provides other ancillary services.

Rail International is comprised of GATX's wholly-owned European operations ("Rail Europe") and its newly established railcar leasing business in India ("Rail India"), as well as two affiliate investments. Rail Europe leases railcars, predominantly tank cars to customers throughout Europe pursuant to full-service leases under which it maintains the railcars and provides insurance and other ancillary services.

ASC operates the largest fleet of U.S. flagged vessels on the Great Lakes, providing waterborne transportation of dry bulk commodities such as iron ore, coal, limestone aggregates and metallurgical limestone.

Portfolio Management is an aggregation of a group of diversified owned assets and joint venture investments ("affiliates") and provides leasing, asset remarketing and asset management services. Portfolio Management selectively invests in long-lived, widely used assets with a focus on domestic marine and container related equipment and extends its market reach through affiliate investments.

Segment profit is an internal performance measure used by the Chief Executive Officer to assess the performance of each segment in a given period. Segment profit includes all revenues, pre-tax earnings from affiliates and net gains on asset dispositions that are attributable to the segments as well as expenses that management believes are directly associated with the financing, maintenance and operation of the revenue earning assets. Segment profit excludes selling, general and administrative expenses, income taxes and certain other amounts not allocated to the segments. These amounts are included in Other.

GATX allocates debt balances and related interest expense to each segment based upon a pre-determined fixed recourse leverage level expressed as a ratio of recourse debt (including off balance sheet debt) to equity. The leverage levels for Rail North America, Rail International, ASC and Portfolio Management are set at5:1,2:1, 1.5:1 and 3:1, respectively. Management believes that by utilizing this leverage and interest expense allocation methodology, each operating segment’s financial performance reflects appropriate risk-adjusted borrowing costs.

The following tables present certain segment data for the years ended December 31, 2012, 2011 and 2010 (in millions):

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
2012 Profitability
Revenues
Lease revenue	$	713.9		$	161.2		$	4.3		$	37.6		$	—		$	917.0
Marine operating revenue	—			—			239.1			26.4			—			265.5
Other revenue	51.4			6.5			—			2.8			—			60.7
Total Revenues	765.3			167.7			243.4			66.8			—			1,243.2
Expenses
Maintenance expense	201.4			46.6			21.7			—			—			269.7
Marine operating expense	—			—			160.3			22.1			—			182.4
Depreciation	167.7			36.1			11.9			21.7			—			237.4
Operating lease expense	126.5			—			3.8			0.2			(0.3		)	130.2
Other operating expense	18.5			5.1			(0.3		)	0.9			—			24.2
Total Expenses	514.1			87.8			197.4			44.9			(0.3		)	843.9
Other Income (Expense)
Net gain on asset dispositions	58.6			1.7			—			19.2			—			79.5
Interest expense, net	(101.9		)	(24.5		)	(7.1		)	(27.7		)	(5.4		)	(166.6		)
Other (expense) income	(5.1		)	(6.1		)	(1.4		)	3.4			1.0			(8.2		)
Share of affiliates' earnings (pre-tax)	6.5			(18.3		)	—			33.4			—			21.6
Segment profit (loss)	$	209.3		$	32.7		$	37.5		$	50.2		$	(4.1	)	325.6
Selling, general and administrative expense																160.2
Income taxes (including $2.0 million related to affiliates' earnings)																28.1
Net income																$	137.3
Selected Balance Sheet Data
Investments in affiliated companies	$	46.9		$	77.2		$	—		$	377.9		$	—		$	502.0
Identifiable assets	$	3,601.1		$	1,105.8		$	284.2		$	797.4		$	266.9		$	6,055.4
Capital Expenditures
Portfolio investments and capital additions	$	465.9		$	200.1		$	12.6		$	83.5		$	7.9		$	770.0

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
2011 Profitability
Revenues
Lease revenue	$	690.9		$	160.5		$	4.2		$	44.5		$	—		$	900.1
Marine operating revenue	—			—			212.2			17.8			—			230.0
Other revenue	51.5			7.8			—			2.0			—			61.3
Total Revenues	742.4			168.3			216.4			64.3			—			1,191.4
Expenses
Maintenance expense	206.1			52.1			19.4			—			—			277.6
Marine operating expense	—			—			151.7			13.9			—			165.6
Depreciation	162.5			33.6			11.3			19.1			—			226.5
Operating lease expense	130.9			—			—			1.4			(0.3		)	132.0
Other operating expense	18.8			4.2			—			4.3			0.5			27.8
Total Expenses	518.3			89.9			182.4			38.7			0.2			829.5
Other Income (Expense)
Net gain on asset dispositions	52.1			—			1.1			12.6			—			65.8
Interest expense, net	(101.7		)	(25.4		)	(7.7		)	(29.6		)	(4.5		)	(168.9		)
Other (expense) income	(5.7		)	7.2			(0.1		)	2.8			(0.1		)	4.1
Share of affiliates' earnings (pre-tax)	3.9			0.5			—			36.2			—			40.6
Segment profit (loss)	$	172.7		$	60.7		$	27.3		$	47.6		$	(4.8	)	303.5
Selling, general and administrative expense																155.3
Income taxes (including $8.2 million related to affiliates' earnings)																37.4
Net income																$	110.8
Selected Balance Sheet Data
Investments in affiliated companies	$	54.0		$	88.2		$	—		$	371.6		$	—		$	513.8
Identifiable assets	$	3,540.2		$	903.2		$	276.1		$	844.0		$	294.0		$	5,857.5
Capital Expenditures
Portfolio investments and capital additions	$	280.5		$	140.8		$	17.4		$	172.0		$	3.9		$	614.6

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
2010 Profitability
Revenues
Lease revenue	$	671.5		$	141.8		$	4.1		$	43.0		$	—		$	860.4
Marine operating revenue	—			—			185.3			13.1			—			198.4
Other revenue	48.5			5.7			—			1.0			—			55.2
Total Revenues	720.0			147.5			189.4			57.1			—			1,114.0
Expenses
Maintenance expense	205.5			49.8			12.9			—			—			268.2
Marine operating expense	—			—			129.1			8.9			—			138.0
Depreciation	158.6			30.2			10.7			17.5			—			217.0
Operating lease expense	139.1			—			—			1.4			(0.3		)	140.2
Other operating expense	24.2			5.1			—			1.3			0.3			30.9
Total Expenses	527.4			85.1			152.7			29.1			—			794.3
Other Income (Expense)
Net gain on asset dispositions	29.6			(0.6		)	—			12.1			—			41.1
Interest expense, net	(103.8		)	(23.3		)	(8.3		)	(28.2		)	(3.5		)	(167.1		)
Other (expense) income	(5.5		)	(2.0		)	0.2			(0.1		)	7.8			0.4
Share of affiliates' earnings (pre-tax)	7.2			(6.0		)	—			36.9			—			38.1
Segment profit	$	120.1		$	30.5		$	28.6		$	48.7		$	4.3		232.2
Selling, general and administrative expense																134.8
Income taxes (including $9.6 million related to affiliates' earnings)																16.6
Net income																$	80.8
Selected Balance Sheet Data
Investments in affiliated companies	$	59.2		$	81.8		$	—		$	345.1		$	—		$	486.1
Identifiable assets	$	3,226.8		$	1,065.6		$	271.3		$	741.0		$	137.7		$	5,442.4
Capital Expenditures
Portfolio investments and capital additions	$	367.1		$	107.5		$	9.0		$	97.4		$	4.1		$	585.1

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Legal Proceedings and Other Contingencies

12 Months Ended

Dec. 31, 2012

Commitments and Contingencies Disclosure [Abstract]

Legal Proceedings and Other Contingencies

Legal Proceedings and Other Contingencies

Various legal actions, claims, assessments and other contingencies arising in the ordinary course of business are pending against GATX and certain of its subsidiaries. These matters are subject to many uncertainties, and it is possible that some of these matters could ultimately be decided, resolved or settled adversely.

Viareggio Derailment

On June 29, 2009, a train consisting of fourteen liquefied petroleum gas (“LPG”) tank cars owned by GATX Rail Austria GmbH (an indirect subsidiary of the Company, “GATX Rail Austria”) and its subsidiaries derailed while passing through the city of Viareggio, Italy. Five tank cars overturned and one of the overturned cars was punctured by a peg or obstacle along the side of the track, resulting in a release of LPG, which subsequently ignited. Thirty-two people died and others were injured in the fire, which also resulted in property damage. The LPG tank cars were leased to FS Logistica S.p.A., a subsidiary of the Italian state-owned railway, Ferrovie dello Stato S.p.A (the “Italian Railway”). On June 28, 2012, the Public Prosecutors of Lucca (“Public Prosecutors”) formally notified GATX Rail Austria and two of its subsidiaries (collectively, “GRA”), as well as several maintenance and supervisory employees (the “Employees”), that they had concluded their investigation of the Viareggio accident and intend to charge GRA and the Employees with various negligence-based crimes related to the accident, all of which are punishable under Italian law by incarceration, damages and fines. Similar notices were issued to, among others, four Italian Railway companies and eighteen of their employees. The Public Prosecutor’s report asserts that a crack in one of the tank car’s axles broke, causing the derailment and resulting in a tank car rupture and release of LPG, after the car hit an obstacle on the side of the track placed there by the Italian Railway. The report alleges that the crack was detectable at the time of final inspection but was overlooked by the Employees at the Jungenthal Waggon GmbH workshop (a subsidiary of GATX Rail Austria). The Company believes that GRA and its Employees acted diligently and properly with respect to applicable legal and industry standards and will present numerous scientific and technical defenses to the Public Prosecutor’s report in the forthcoming proceedings. With respect to claims for personal injuries and property damages, the Company and its subsidiaries maintain insurance for such losses, and the Company’s insurers are working cooperatively with the insurer for the Italian Railway to adjust and settle these claims. These joint settlement efforts have resolved the majority of asserted civil damage claims related to the accident, and joint efforts to resolve the remaining civil claims are ongoing. In addition to settling civil claims, the Company’s insurers have been providing reimbursement for legal defense costs, including the costs of criminal defense. One of the Company’s eleven insurers notified the Company that, with respect to its layer of coverage, it will not reimburse the costs of criminal defense, and another insurer has issued a general reservation of rights with respect to coverage of criminal defense costs. The Company is engaged in insurance coverage discussions with its insurers to attempt resolution of the issue. The Company cannot predict the outcome of those discussions or the amount of criminal defense costs that ultimately may not be reimbursed by that insurer. Additionally, the Company cannot predict the outcome of the foregoing legal proceedings or what other legal proceedings, if any, may be initiated against GRA or its personnel, and, therefore, cannot reasonably estimate the amount or range of loss (including criminal defense costs) that may ultimately be incurred in connection with this accident. Accordingly, the Company has not established any accruals with respect to this matter.

Other Litigation

GATX and its subsidiaries have been named as defendants in various other legal actions and claims, governmental proceedings and private civil suits arising in the ordinary course of business, including environmental matters, workers’ compensation claims and other personal injury claims. Some of these proceedings include claims for punitive as well as compensatory damages.

Several of the Company’s subsidiaries have also been named as defendants or co-defendants in cases alleging injury caused by exposure to asbestos. The plaintiffs seek an unspecified amount of damages based on common law, statutory or premises liability or, in the case of ASC, the Jones Act, which provides limited remedies to certain maritime employees. As of January 31, 2013, there were 188 asbestos-related cases pending against the Company and its subsidiaries. Of the total number of pending cases, 156 are Jones Act claims, most of which were filed against ASC before the year 2000. During 2012, 12 new cases were filed, and 18 cases were dismissed without payment or otherwise settled for an immaterial amount. In addition, demand has been made against the Company for asbestos-related claims under limited indemnities given in connection with the sale of certain former subsidiaries of the Company. It is possible that the number of these cases or claims for indemnity could begin to grow and that the cost of these cases, including costs to defend, could correspondingly increase in the future.

Litigation Accruals

The Company has recorded accruals totaling $2.0 million at December 31, 2012, for losses related to those litigation matters that the Company believes to be probable and for which an amount of loss can be reasonably estimated. However, the Company cannot determine a reasonable estimate of the maximum possible loss or range of loss for these matters given that they are at various stages of the litigation process and each case is subject to the inherent uncertainties of litigation (such as the strength of the Company's legal defenses and the availability of insurance recovery). Although the maximum amount of liability that may ultimately result from any of these matters cannot be predicted with absolute certainty, management expects that none of the matters for which the Company has recorded an accrual, when ultimately resolved, will have a material adverse effect on GATX's consolidated financial position or liquidity. It is possible, however, that the ultimate resolution of one or more of these matters could have a material adverse effect on the Company's results of operations in a particular quarter or year if such resolution results in liability that materially exceeds the accrued amount.

In addition, other litigation matters are pending for which the Company has not recorded any accruals because the Company's potential liability for those matters is not probable or cannot be reasonably estimated based on currently available information. For those matters where the Company has not recorded an accrual but a loss is reasonably possible, the Company cannot determine a reasonable estimate of the maximum possible loss or range of loss for these matters given that they are at various stages of the litigation process and each case is subject to the inherent uncertainties of litigation (such as the strength of the Company's legal defenses and the availability of insurance recovery). Although the maximum amount of liability that may ultimately result from any of these matters cannot be predicted with absolute certainty, management expects that none of the matters for which the Company has not recorded an accrual, when ultimately resolved, will have a material adverse effect on GATX's consolidated financial position or liquidity. It is possible, however, that the ultimate resolution of one or more of these matters could have a material adverse effect on the Company's results of operations in a particular quarter or year if such resolution results in a significant liability for the Company.

Environmental

The Company's operations are subject to extensive federal, state and local environmental regulations. GATX's operating procedures include practices to protect the environment from the risks inherent in full service railcar leasing, which involves maintaining railcars used by customers to transport chemicals and other hazardous materials. Additionally, some of GATX's real estate holdings, including previously owned properties, are or have been used for industrial or transportation-related purposes or leased to commercial or industrial companies whose activities might have resulted in discharges on the property. As a result, GATX is subject to environmental cleanup and enforcement actions. In particular, the federal Comprehensive Environmental Response, Compensation and Liability Act (“CERCLA”), also known as the Superfund law, as well as similar state laws, impose joint and several liability for cleanup and enforcement costs on current and former owners and operators of a site without regard to fault or the legality of the original conduct. If there are other potentially responsible parties (“PRPs”), GATX generally contributes to the cleanup of these sites through cost-sharing agreements with terms that vary from site to site. Costs are typically allocated based on the relative volumetric contribution of material, the period of time the site was owned or operated, and/or the portion of the site owned or operated by each PRP.

At the time a potential environmental issue is identified, initial accruals for environmental liability are established when such liability is probable and a reasonable estimate of the associated costs can be made. Costs are estimated based on the type and level of investigation and/or remediation activities that the Company's internal environmental staff (and where appropriate, independent consultants) have determined to be necessary to comply with applicable laws and regulations. Activities include surveys and environmental studies of potentially contaminated sites as well as costs for remediation and restoration of sites determined to be contaminated. In addition, GATX has provided indemnities for potential environmental liabilities to buyers of divested companies. In these instances, accruals are based on the scope and duration of the respective indemnities together with the extent of known contamination. Estimates are periodically reviewed and adjusted as required to reflect additional information about facility or site characteristics or changes in regulatory requirements. GATX conducts a quarterly environmental contingency analysis, which considers a combination of factors including independent consulting reports, site visits, legal reviews, analysis of the likelihood of participation in and the ability of other PRPs to pay for cleanup, and historical trend analyses.

GATX is involved in administrative and judicial proceedings and other voluntary and mandatory cleanup efforts at 17 sites, including Superfund sites, at which it is contributing to the cost of performing the study or cleanup, or both, of alleged environmental contamination. As of December 31, 2012, GATX has recorded accruals of $15.6 million for remediation and restoration costs that the Company believes to be probable and for which the amount of loss can be reasonably estimated. These amounts are included in other liabilities on GATX's balance sheet. GATX's environmental liabilities are not discounted.

The Company did not materially change its methodology for identifying and calculating environmental liabilities in the last three years. Currently, no known trends, demands, commitments, events or uncertainties exist that are reasonably likely to occur and materially affect the methodology or assumptions described above.

The recorded accruals represent the Company's best estimate of all costs for remediation and restoration of affected sites, without reduction for anticipated recoveries from third parties, and include both asserted and unasserted claims. However, the Company is unable to provide a reasonable estimate of the maximum potential loss associated with these sites because cleanup costs cannot be predicted with certainty. Various factors beyond the Company's control can impact the amount of loss the Company will ultimately incur with respect to these sites, including the extent of corrective actions that may be required; evolving environmental laws and regulations; advances in environmental technology, the extent of other parties' participation in cleanup efforts; developments in periodic environmental analyses related to sites determined to be contaminated, and developments in environmental surveys and studies of potentially contaminated sites. As a result, future charges associated with these sites could have a significant effect on results of operations in a particular quarter or year if the costs materially exceed the accrued amount as individual site studies and remediation and restoration efforts proceed. However, management believes it is unlikely that the ultimate cost to GATX for any of these sites, either individually or in the aggregate, will have a material adverse effect on GATX's consolidated financial position or liquidity.

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Income Taxes (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Deferred Tax Liabilities
Book/tax basis difference due to depreciation	$ 806.7	$ 756.2
Leveraged leases	0	62.7
Investments in affiliated companies	81.6	82.4
Lease accounting (other than leveraged)	12.6	13.7
Other	3.1	2.9
Total deferred tax liabilities	904.0	917.9
Deferred Tax Assets
Alternative minimum tax credit	5.2	8.9
Federal net operating loss	0	38.1
Foreign tax credit	7.3	13.9
Valuation on foreign tax credit	(7.3)	(13.9)
State net operating loss	26.6	31.1
Valuation on state net operating loss	(12.8)	(15.8)
Foreign net operating loss	9.5	7.3
Accruals not currently deductible for tax purposes	19.1	21.8
Allowance for losses	6.6	5.4
Pension and post-retirement benefits	48.6	40.7
Other	18.2	14.5
Total deferred tax assets	121.0	152.0
Net deferred tax liabilities	783.0	765.9
Gross liability for unrecognized tax benefits
Beginning balance	20.8	42.7
Reductions due to expiration of the applicable statute of limitations	(16.1)	0
Reductions due to settlement of audit issues	0	21.9
Ending balance	$ 4.7	$ 20.8

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Supplemental Cash Flow and Noncash Investing Transactions (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Supplemental Cash Flow Information
Interest paid	$ 162.3	[1]	$ 152.7	[1]	$ 152.6	[1]
Income taxes paid (refunded), net	$ 11.1		$ (2.8)		$ 13.0

[1] Interest paid consisted of interest on debt obligations, interest rate swaps (net of interest received) and capital lease interest. Interest expense capitalized as part of the cost of construction of major assets was immaterial for all periods presented.

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Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2012

Earnings Per Share [Abstract]

Computation of basic and diluted net income per common share

The following table sets forth the computation of basic and diluted net income per common share for the years ending December 31 (in millions, except per share data):

	2012		2011		2010
Numerator:
Net income	$	137.3	$	110.8	$	80.8
Numerator for basic earnings per share — income available to common shareholders	$	137.3	$	110.8	$	80.8
Effect of dilutive securities:
After-tax interest expense on convertible securities	—		—		0.2
Numerator for diluted earnings per share — income available to common shareholders	$	137.3	$	110.8	$	81.0
Denominator:
Denominator for basic earnings per share — weighted average shares	46.8		46.4		46.1
Effect of dilutive securities:
Equity compensation plans	0.7		0.7		0.5
Convertible preferred stock	0.1		0.1		0.1
Convertible securities	—		—		0.3
Denominator for diluted earnings per share — adjusted weighted average and assumed conversion	47.6		47.2		47.0
Basic earnings per share	$	2.93	$	2.39	$	1.75
Diluted earnings per share	$	2.88	$	2.35	$	1.72

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Selected Quarterly Financial Data (unaudited)

12 Months Ended

Dec. 31, 2012

Quarterly Financial Information Disclosure [Abstract]

Selected Quarterly Financial Data (unaudited)

Selected Quarterly Financial Data (unaudited)

	First  Quarter		(a)	Second Quarter			Third Quarter			Fourth Quarter		Total
	In millions, except per share data
2012
Total revenues	$	256.5		$	323.1		$	331.9		$	331.7	$	1,243.2
Net income	$	30.3		$	23.5	(b)	$	53.8	(c)	$	29.7	$	137.3
Per Share Data
Basic	$	0.65		$	0.50		$	1.15		$	0.63	$	2.93
Diluted	$	0.64		$	0.49		$	1.13		$	0.62	$	2.88
2011
Total revenues	$	249.4		$	296.8		$	315.2		$	330.0	$	1,191.4
Net income	$	19.9		$	26.4		$	32.9		$	31.6	$	110.8
Per Share Data
Basic	$	0.43		$	0.57		$	0.71		$	0.68	$	2.39
Diluted	$	0.42		$	0.56		$	0.70		$	0.67	$	2.35

___________________

(a) Total revenues and net income in the first quarter of each year are typically lower than the subsequent quarters due to seasonal inactivity at ASC.

(b) The decrease in income from the first quarter of 2012 was primarily due to a $12.1 million loss on the termination of a qualified hedge at GATX's AAE Cargo affiliate, partially offset by an increase in seasonal income at ASC.

(c) The increase in income from the second quarter of 2012 was primarily due to the absence of the hedge loss at AAE and the recognition of $15.5 million of tax benefits.

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Condensed Financial Information of Registrant

12 Months Ended

Dec. 31, 2012

Condensed Financial Information of Parent Company Only Disclosure [Abstract]

Condensed Financial Information of Registrant

SCHEDULE I — CONDENSED FINANCIAL INFORMATION OF REGISTRANT

GATX CORPORATION

(Parent Company)

BALANCE SHEETS

(In millions)

	December 31
	2012	2011
Assets
Cash and cash equivalents	183.5	208.4
Operating assets and facilities, net	2,501.7	2,355.9
Investments in affiliated companies	2,043.8	2,010.9
Other assets	440.0	478.1
Total Assets	5,169.0	5,053.3
Liabilities and Shareholders’ Equity
Accounts payable and accrued expenses	105.0	56.1
Debt	2,761.1	2,986.6
Other liabilities	1,058.7	883.3
Total Liabilities	3,924.8	3,926.0
Total Shareholders’ Equity	1,244.2	1,127.3
Total Liabilities and Shareholders’ Equity	5,169.0	5,053.3

The accompanying note is an integral part of these financial statements.

SCHEDULE I — CONDENSED FINANCIAL INFORMATION OF REGISTRANT (CONT’D)

GATX CORPORATION

(Parent Company)

STATEMENTS OF COMPREHENSIVE INCOME

(In millions)

	Year Ended December 31
	2012			2011			2010
Revenues
Lease revenue	$	504.5		$	477.7		$	458.9
Other revenue	43.5			44.4			41.0
Total Revenues	548.0			522.1			499.9
Expenses
Maintenance expense	154.8			163.9			168.7
Depreciation	122.2			117.0			110.2
Operating lease expense	91.6			95.2			101.3
Other operating expense	12.0			11.5			20.2
Selling, general and administrative expense	118.4			113.3			97.2
Total Expenses	499.0			500.9			497.6
Other Income (Expense)
Net gain on asset dispositions	59.4			44.0			27.0
Interest expense, net	(65.4		)	(72.8		)	(74.0		)
Other (expense) income	(4.4		)	(2.4		)	3.7
Income (loss) before Income Taxes and Share of Affiliates' Earnings	38.6			(10.0		)	(41.0		)
Income tax benefit	1.0			4.8			20.8
Share of affiliates' earnings (net of tax)	97.7			116.0			101.0
Net Income	$	137.3		$	110.8		$	80.8
Other Comprehensive Income, net of taxes
Foreign currency translation adjustments	25.0			(39.6		)	(28.4		)
Unrealized gain (loss) on securities	0.2			(0.2		)	1.3
Unrealized gain (loss) on derivative instruments	11.7			(0.5		)	(3.5		)
Post-retirement benefit plans	(12.4		)	(18.8		)	5.1
Other comprehensive income (loss)	24.5			(59.1		)	(25.5		)
Comprehensive Income	$	161.8		$	51.7		$	55.3

The accompanying note is an integral part of these financial statements.

SCHEDULE I — CONDENSED FINANCIAL INFORMATION OF REGISTRANT (CONT’D)

GATX CORPORATION

(Parent Company)

STATEMENTS OF CASH FLOWS

(In millions)

	Year Ended December 31
	2012			2011			2010
Operating Activities
Net cash provided by operating activities	$	269.6		$	95.0		$	92.8
Investing Activities
Capital additions	(444.6		)	(343.1		)	(417.1		)
Proceeds from sale-leasebacks	104.9			—			79.0
Portfolio proceeds and other	136.6			143.0			65.4
Purchases of leased-in assets	(1.4		)	(61.1		)	(5.3		)
Capital contributions to affiliates, net	—			(25.7		)	—
Net cash used in investing activities	(204.5		)	(286.9		)	(278.0		)
Financing Activities
Repayments of debt (original maturities longer than 90 days)	(603.7		)	(195.9		)	(286.3		)
Net increase (decrease) in debt with original maturities of 90 days or less	185.0			(89.1		)	58.6
Proceeds from issuances of debt (original maturities longer than 90 days)	381.4			701.0			493.5
Dividends	(57.7		)	(56.0		)	(53.5		)
Other	5.0			(8.6		)	(6.3		)
Net cash (used in) provided by financing activities	(90.0		)	351.4			206.0
Net (decrease) increase in cash and cash equivalents during the period	(24.9		)	159.5			20.8
Cash and Cash Equivalents at beginning of period	208.4			48.9			28.1
Cash and Cash Equivalents at end of period	$	183.5		$	208.4		$	48.9
Total Distributions from Affiliates	$	101.0		$	—		$	57.3

The accompanying note is an integral part of these financial statements.

Note to Condensed Financial Statements

Basis of Presentation

The condensed financial statements represent the Balance Sheets, Statements of Comprehensive Income and Cash Flows of GATX Corporation (“GATX” or the “Company”), the parent company. In these parent company financial statements, GATX’s investment in subsidiaries and joint ventures (collectively "Affiliates") is stated at cost plus equity in undistributed earnings since the date of acquisition. The Company’s share of net income from Affiliates is recorded using the equity method. GATX’s parent company financial statements should be read in conjunction with its consolidated financial statements.

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Accounting Changes

12 Months Ended

Dec. 31, 2012

Accounting Changes and Error Corrections [Abstract]

Accounting Changes

Accounting Changes

Goodwill — In September 2011, the Financial Accounting Standards Board (FASB) issued authoritative accounting guidance that allows an entity to assess qualitative factors to determine if performing the two-step goodwill impairment test is necessary. The assessment of qualitative factors requires an entity to evaluate all events or circumstances that could impact the likelihood that the fair value of a reporting unit is less than its carrying amount. The guidance is effective for periods beginning after December 15, 2011. Application of the new guidance did not impact GATX’s financial position, results of operations or cash flows.

Fair Value Measurement — In May 2011, the FASB issued authoritative accounting guidance that changed some fair value measurement principles, clarified the application of existing guidance, and enhanced fair value disclosure requirements. The guidance requires an entity to disclose transfers between Level 1 and Level 2 fair value measurements and the reasons for those transfers. The guidance is effective for periods beginning after December 15, 2011. Application of the new guidance did not impact GATX’s financial position, results of operations or cash flows.

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Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2012

Accounting Policies [Abstract]

Basis of presentation

Basis of Presentation — The accompanying consolidated financial statements were prepared in accordance with United States generally accepted accounting principles (“GAAP”).

Use of Estimates

Use of Estimates — The preparation of these financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements. The Company regularly evaluates its estimates and judgments based on historical experience and other relevant facts and circumstances. Actual amounts could differ from those estimates.

Correction of Misstatement

Correction of Misstatement — During the first quarter of 2010, the Company discovered a clerical error in the preparation of its consolidated balance sheet as of December 31, 2009, and consolidated statement of cash flows for the year ended December 31, 2009. The error resulted in a $13.1 million overstatement in each of cash and cash equivalents; accounts payable and accrued expenses; and net cash provided by operating activities. Management determined that the effect of this error was immaterial and adjusted its consolidated balance sheet and consolidated statement of cash flows in 2010 to correct this error.

Reclassification

Reclassification — Certain amounts reported in the 2011 and 2010 financial statements have been reclassified to conform to the 2012 presentation. In particular, GATX changed the presentation of certain items reported on its Statement of Comprehensive Income. Specifically:

• Asset remarketing income and scrapping gains were removed from revenue and asset impairments were removed from other expense. These amounts have been aggregated and included as a separate line item entitled net gain (loss) on asset dispositions.

• Share of affiliates' earnings was formerly presented as a pre-tax line item and was combined with revenue in the gross income line. These earnings are now presented on a net-of-tax basis after the subtotal "Income before Income Taxes and Share of Affiliates' Earnings".

• Operating revenues relating to Portfolio Management owned vessels are reported as marine operating revenues. Previously they were treated as usage rents and recorded with lease income. The related marine operating expenses, which were previously reported as other expenses, are now reported as marine operating expenses.

Consolidation

Consolidation — The consolidated financial statements of GATX Corporation and Subsidiaries include the assets, liabilities, revenues and expenses of GATX, all majority-owned subsidiaries that the Company controls and variable interest entities (“VIEs”) for which the Company is the primary beneficiary. Intercompany transactions and balances have been eliminated. GATX's consolidated subsidiaries include the following special-purpose corporations engaged in the financing of railcars, General American Railcar Corporation, General American Railcar Corporation II, General American Railcar Corporation III, General American Marks Company and GARC LLC (collectively the "SPCs"). The obligations of the SPCs are nonrecourse to GATX and their assets are available first to satisfy claims of their creditors.

Variable Interest Entities

Variable Interest Entities — GATX evaluates whether an entity is a VIE based on the sufficiency of the entity’s equity and whether the equity holders have the characteristics of a controlling financial interest. To determine if it is the primary beneficiary of a VIE, GATX assesses whether it has the power to direct the activities that most significantly impact the economic performance of the VIE and the obligation to absorb losses or the right to receive benefits that may be significant to the VIE. These determinations are both qualitative and quantitative, and they require management to make judgments and assumptions about the VIE’s forecasted financial performance and the volatility inherent in those forecasted results. GATX evaluates new investments for VIE determination and regularly reviews all existing entities for events that may result in an entity becoming a VIE or GATX becoming the primary beneficiary of an existing VIE. See Note 7 for additional information

Investments in Affiliated Companies

Investments in Affiliated Companies —Investments in joint ventures and other non-controlled entities are accounted for using the equity method when it is determined that GATX has the ability to exercise significant influence over the financial and operating policies of the investee. Under the equity method, initial investments are recorded at cost and then adjusted for GATX’s share of the affiliates’ undistributed earnings and losses, distributions of capital, and loan payments to or from the affiliate. Loans to and from affiliates are reflected as part of GATX’s investment in the affiliate and interest on these loans is included in GATX’s proportional share of the affiliates’ earnings. GATX reviews the carrying amount of its investments in affiliates annually, or whenever events or circumstances indicate that a decline in value may have occurred. If GATX determines an investment is impaired on an other-than-temporary basis, it records a loss equal to the difference between the fair value of the investment and its carrying value. See Note 6 for additional information

Fair Value Measurements

Fair Value Measurements —As defined by GAAP, fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value measurements are classified according to a three-level hierarchy based on management’s judgment about the reliability of the inputs used in the fair value measurement. Level 1 inputs are quoted prices available in active markets for identical assets or liabilities. Level 2 inputs are observable, either directly or indirectly, and include quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3 inputs are unobservable, meaning they are supported by little or no market activity. Fair value measurements classified as Level 3 typically rely on the use of pricing models and discounted cash flow methodologies where significant management judgment is required. See Note 9 for additional information

Cash and Cash Equivalents

Cash and Cash Equivalents — All highly liquid investments with a maturity of three months or less when purchased are classified as cash equivalents

Restricted cash

Restricted Cash — Cash and cash equivalents that are restricted as to withdrawal and use. GATX’s restricted cash primarily relates to contractually required amounts maintained for six wholly-owned bankruptcy-remote, special-purpose corporations.

Loans

Loans — GATX records loans at the principal amount outstanding plus accrued interest. The loan portfolio is reviewed regularly and a loan is classified as impaired when it is probable that GATX will be unable to collect all amounts due under the loan agreement. Since most loans are collateralized, impairment is generally measured as the amount by which the carrying value of the loan exceeds expected repayments plus the fair value of the underlying collateral. Generally, interest income is not recognized on impaired loans until the loan has been paid up to contractually current status or as conditions warrant

Operating Assets and Facilities

Operating Assets and Facilities — Operating assets and facilities are principally stated at cost plus capitalized improvements. Assets acquired under capital leases are included in operating assets, and the related obligations are recorded as liabilities. Operating assets and facilities are depreciated over their estimated useful lives or lease terms to estimated residual values using the straight-line method. Leasehold improvements are depreciated over the shorter of their useful lives or the lease term. The estimated depreciable lives of operating assets and facilities are as follows:

Railcars	30 — 38 years
Locomotives	10 — 20 years
Buildings	40 — 50 years
Leasehold improvements	5 — 15 years
Marine vessels	30 — 65 years
Other equipment	5 — 30 years

GATX reviews long-lived assets, such as operating assets and facilities, for impairment whenever events or circumstances indicate that the carrying amount of such assets may not be recoverable. Recoverability of assets to be held and used is evaluated by comparing the carrying amount of the asset to the undiscounted future net cash flows GATX expects the asset to generate. If GATX determines an asset is impaired, it recognizes an impairment loss equal to the excess of the carrying amount over the asset’s fair value. Assets to be disposed of that meet specified accounting criteria are classified as held for sale and recorded at the lower of their carrying amount or fair value less costs to sell

Lease Classification

Lease Classification — GATX determines the classification of a lease at its inception. If the provisions of the lease subsequently change, other than by renewal or extension, GATX evaluates if that change would have resulted in a different classification had the change been in effect at inception. If so, the revised agreement is considered a new lease for lease classification purposes. See Note 5 for additional information

Finance Leases

Finance Leases — Finance leases include direct finance leases and leveraged leases. Direct finance leases consist of a gross lease payment receivable and an estimated residual value of the leased equipment at the lease termination date, net of unearned income. Lease payment receivables represent the rent GATX will receive over the remainder of the lease term. Initial unearned income is the amount by which the sum of the original lease payment receivable and the estimated residual value exceeds the original cost or carrying value of the underlying equipment. GATX amortizes unearned income to lease income over the lease term in a manner that produces a constant rate of return on the net investment in the lease. Finance leases that are mainly financed at inception with nonrecourse borrowings and that meet certain criteria are accounted for as leveraged leases. Leveraged lease receivables are stated net of related nonrecourse debt. Initial unearned income for leveraged leases is the excess of anticipated cash flows (including estimated residual values and net of the related debt service) over the original investment in the lease. See Note 5 for additional information.

GATX regularly reviews the performance of the finance lease portfolio and classifies finance leases as non-performing if it is probable that GATX will be unable to collect all amounts due under the lease. GATX suspends the accrual of income on non-performing finance leases until all contractual payments are current or as conditions warrant. Payments received on non-performing finance leases are applied to the lease payment receivable.

Residual Values

Residual Values — Residual values are a component of GATX’s investment in finance leases. Residual values are the estimated value of an asset at the end of a finance lease contract. GATX reviews its estimates of residual value annually or whenever events or circumstances indicate that residual values may have declined. Other-than-temporary declines in value are recognized as impairments.

Inventory

Inventory — GATX’s inventory consists of railcar and locomotive repair components and marine vessel spare parts. All inventory balances are stated at lower of cost or market. Railcar repair components are valued using the average cost method. Vessel spare parts inventory is valued using the first-in, first-out method. Inventory is included in other assets on the balance sheet

Goodwill

Goodwill — GATX recognizes goodwill when the purchase price of an acquired business exceeds the fair value of the acquired net assets and assigns the goodwill to the same reporting unit as the net assets of the acquired business. GATX’s reporting units are based on the composition of its operating segments, taking into consideration whether the operating segments consist of multiple businesses and, if so, whether the businesses operate in different economic environments. Goodwill is tested annually for impairment by comparing the fair value of the reporting unit with its carrying amount, including goodwill. If the fair value of the reporting unit exceeds its carrying amount, then the goodwill of the reporting unit is not considered impaired. If the carrying amount of the reporting unit exceeds its fair value, GATX compares the implied fair value of the reporting unit’s goodwill (the reporting unit fair value less its carrying amount, excluding goodwill) with the carrying amount of the goodwill. An impairment loss is recorded in the amount that the carrying amount of goodwill exceeds its implied fair value. Reporting unit fair values are primarily estimated using discounted cash flow models. GATX performs its impairment test annually, in the fourth quarter, or in interim periods if events or circumstances indicate a potential impairment. See Note 16 for additional information.

Allowance for Losses

Allowance for Losses — The allowance for losses is an estimate of credit losses existing in reservable assets. Reservable assets are divided into two categories: rent and other receivables, which includes short-term trade billings, and loans and finance lease receivables. GATX bases loss reserves for rent and other receivables on historical loss experience and judgments about the impact of economic conditions, the state of the markets GATX operates in and collateral values. In addition, GATX may establish specific reserves for known troubled accounts. Reserve estimates for loans and finance lease receivables are generally evaluated on a customer-specific basis, considering the same factors as rent and other receivables as well as a regular assessment of each customer’s specific credit situation. Amounts are charged against the allowance when they are deemed to be uncollectable. There were no material changes in estimation methods or assumptions for the allowance during 2012. GATX believes that the allowance is adequate to cover losses inherent in its reservable assets as of December 31, 2012. Since the allowance is based on judgments and estimates, it is possible that actual losses incurred will differ from the estimate. See Note 17 for additional information.

Income Taxes

Income Taxes — Provisions for federal, state and foreign income taxes are calculated on reported income before income taxes. Calculations of deferred tax assets and liabilities are based on the differences between the financial statement and tax bases of assets and liabilities, using enacted rates in effect for the year the differences are expected to reverse. The cumulative effect of any changes in tax rates from those previously used in determining deferred tax assets and liabilities is reflected in the provision for income taxes in the period of change. Provisions for income taxes in any given period differ from those currently payable or receivable because certain items of income and expense are recognized in different periods for financial reporting purposes than for income tax purposes. Uncertain tax positions are items deducted for tax purposes, but for which a tax benefit has not been recognized in the financial statements due to the uncertainty of the tax position. GATX’s liability for uncertain tax positions is included in other liabilities on the balance sheet. See Note 12 for additional information.

Derivatives

Derivatives — GATX recognizes all derivative instruments at fair value and classifies them on the balance sheet as either other assets or other liabilities. Classification of derivative activity in the statements of comprehensive income and cash flows is generally determined by the nature of the hedged item. Gains and losses on derivatives that are not accounted for as hedges are classified as other expenses and the related cash flows are included in cash flows from operating activities.

Derivatives that meet specific accounting criteria are formally designated as qualifying hedges at inception. These criteria require that the derivative is expected to be highly effective at offsetting changes in the fair value or expected cash flows of the hedged exposure both at the inception of the hedging relationship and on an ongoing basis. GATX primarily uses derivatives, such as interest rate swap agreements, Treasury rate locks, options and currency forwards, to hedge its exposure to interest rate and foreign currency exchange rate risk on existing and anticipated transactions. For derivatives designated as fair value hedges, changes in the fair value of both the derivative and the hedged item are recognized in earnings. For derivatives designated as cash flow hedges, the effective portion of the change in the fair value of the derivative is recorded as part of other comprehensive income (loss) and recognized in earnings in the period the hedged transaction affects earnings. Any ineffective portion of the change in the fair value of the derivative is immediately recognized in earnings. Although GATX does not hold or issue derivative financial instruments for purposes other than hedging, certain derivatives are not designated as accounting hedges. Changes in the fair value of these derivatives are recognized in earnings immediately. See Note 9 for additional information

Defined Benefit Pension and Other Post-Retirement Plans

Defined Benefit Pension and Other Post-Retirement Plans —GATX’s balance sheet reflects the funded status of its pension and post-retirement plans. The funded status of the plans is measured as the difference between the fair value of the plan assets and the projected benefit obligation. GATX recognizes the aggregate overfunding of any plans in other assets, the aggregate underfunding of any plans in other liabilities and the corresponding adjustments to other comprehensive income (loss), net of related taxes.

Foreign Currency

Foreign Currency — The assets and liabilities of GATX’s operations having non-U.S. dollar functional currencies are translated at exchange rates in effect at year end. Income, expenses and cash flows are translated monthly, using average exchange rates. Gains and losses resulting from the translation of foreign currency financial statements are deferred and recorded as a separate component of other comprehensive income (loss). Gains (losses) resulting from foreign currency transactions and from the remeasurement of non-functional currency denominated assets and liabilities, which are recorded net of related hedges in other expense during the periods in which they occur, were $0.5 million, $(1.6) million and $(1.7) million for 2012, 2011 and 2010, respectively.

Environmental Liabilities

Environmental Liabilities — GATX records reserves for environmental remediation costs at sites relating to past and/or discontinued operations when they are probable and a reasonable estimate of the expected costs can be made. Adjustments to initial estimates are recorded when necessary. Since reserves are based on estimates, actual environmental remediation costs may differ. Environmental remediation costs that relate to current or future operations are expensed or capitalized as appropriate. See Note 22 for additional information.

Revenue Recognition

Lease Revenue — Lease revenue includes revenue from full-service and net operating leases, and direct finance leases. Full-service leases are priced as an integrated service that includes amounts related to executory costs (e.g., maintenance, insurance and ad valorem taxes). GATX does not offer stand-alone maintenance service contracts and is unable to separate executory costs from full service lease income based on observable data. Operating lease revenue, including amounts related to executory costs, is recognized on a straight-line basis over the term of the underlying lease. As a result, lease revenue may not be recognized in the same period as maintenance and other executory costs, which are expensed as incurred. Finance lease income is recognized using the interest method, which produces a constant yield over the term of the lease. See Note 5 for additional information.

Marine Operating Revenue —Marine operating revenue is recognized as shipping services are performed and revenue is allocated among reporting periods based on the relative transit time in each reporting period for shipments in process at any month end.

Other Revenue — Other revenue includes customer liability repair revenue, fee income, interest on loans and other miscellaneous revenues. These revenues are recognized when earned, which, in the case of management fees received from affiliates, is when services are performed.

Interest expense, net

Interest Expense, net — Interest expense is the interest accrued on indebtedness and amortization of debt issuance costs and debt discounts. Debt issuance costs and discounts are deferred and amortized over the applicable term of the related debt. Interest expense is reported net of interest income on bank deposits, which was $1.9 million, $0.7 million and $0.2 million for 2012, 2011 and 2010, respectively.

Operating Lease Expense

Operating Lease Expense — GATX leases certain railcars and other assets and facilities closely associated with its revenue generating operations, such as maintenance facilities and equipment. These leases are classified as operating leases and the associated lease expense is recorded on a straight-line basis. Gains and financing costs associated with sale-leasebacks are deferred and amortized as a component of operating lease expense over the related leaseback term. GATX’s leases of office facilities and related administrative assets are also classified as operating leases and the associated expense is recorded in selling, general, and administrative expense (“SG&A”). Total operating lease expense, which includes amounts recorded in SG&A, was $133.3 million, $137.3 million and $145.4 million, in 2012, 2011 and 2010, respectively. See Note 5 for additional information.

Lease and Loan Origination Costs

Lease and Loan Origination Costs — Initial direct costs of direct finance leases are deferred and amortized over the lease term as an adjustment to lease income. Loan origination fees and related direct loan origination costs for a given loan are offset, and the net amount is deferred and amortized over the term of the loan as an adjustment to interest income.

Maintenance and Repair Costs

Maintenance and Repair Costs — Maintenance and repair costs are expensed as incurred. Costs incurred in connection with planned major maintenance activities that improve or extend the useful life of an asset are capitalized and depreciated over their estimated useful life. Required regulatory survey costs for vessels are capitalized and amortized over the applicable survey period, which is generally five years.

ASC Expense Seasonality

ASC Expense Seasonality —

Share-Based Compensation

Share-Based Compensation — GATX measures share-based compensation expense based on the grant date fair value of an award and recognizes the expense net of estimated forfeitures over the requisite service period of each award. Forfeiture rates are estimated at the grant date based on historical experience and adjusted in subsequent periods for differences in actual forfeitures from those estimates. See Note 11 for additional information.

Net Gain on Asset Dispositions

Net Gain on Asset Dispositions — Net gain on asset dispositions consists of disposition gains on sales of operating assets and residual sharing income ("asset remarketing income"), non-remarketing disposition gains, and asset impairments. Disposition gains, including non-remarketing gains, are recognized upon completion of the sale or scrapping of operating assets. Residual sharing income includes fees received from sale of managed assets and assets subject to residual value guarantees, and are recognized upon completion of the underlying transactions.

Other Income (Expense)

Other Income (Expense) —Other income and expense includes fair value adjustments, gains and/or losses on foreign currency transactions and remeasurements, legal defense costs and litigation settlements, along with other miscellaneous income and expense items.

New Accounting Pronouncements

Accumulated Other Comprehensive Income - In January 2013, the FASB issued authoritative accounting guidance that requires presentation and disclosure of the effects on components of net income of significant amounts reclassified out of accumulated other comprehensive income. The guidance becomes effective for periods beginning after December 31, 2012, with early adoption permitted. Application of the new guidance will not impact GATX's financial position, results of operations or cash flows.

XML

Pension and Other Post-Retirement Benefits (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Change in Fair Value of Plan Assets
Plan assets at beginning of year	$ 377,500,000
Company contributions	1,600,000	1,400,000	0
Plan assets at end of year	409,100,000	377,500,000
Amount Recognized
Other liabilities	(112,800,000)	(92,300,000)
Accumulative other comprehensive loss:
After-tax amount recognized in accumulated other comprehensive loss	131,100,000	118,700,000	99,900,000	105,000,000
Defined Benefit Pension [Member]
Change in Benefit Obligation
Benefit obligation at beginning of year	425,000,000	413,200,000
Service cost	5,700,000	5,400,000	5,300,000
Interest cost	19,700,000	20,700,000	22,100,000
Actuarial loss	49,200,000	13,500,000
Benefits paid	(27,400,000)	(27,500,000)
Effect of foreign exchange rate changes	1,600,000	(300,000)
Benefit obligation at end of year	473,800,000	425,000,000	413,200,000
Change in Fair Value of Plan Assets
Plan assets at beginning of year	377,500,000	392,700,000
Actual return on plan assets	55,300,000	10,200,000
Effect of exchange rate changes	1,600,000	(100,000)
Company contributions	2,100,000	2,200,000
Benefits paid	(27,400,000)	(27,500,000)
Plan assets at end of year	409,100,000	377,500,000	392,700,000
Funded Status at end of year	(64,700,000)	(47,500,000)
Amount Recognized
Other liabilities	(64,700,000)	(47,500,000)
Accumulative other comprehensive loss:
Net actuarial loss	207,400,000	193,500,000
Prior service credit (cost)	(4,100,000)	(5,100,000)
Accumulated other comprehensive loss	203,300,000	188,400,000
Total recognized	138,600,000	140,900,000
After-tax amount recognized in accumulated other comprehensive loss	126,800,000	117,600,000
Retiree Health and Life [Member]
Change in Benefit Obligation
Benefit obligation at beginning of year	44,800,000	46,600,000
Service cost	200,000	200,000	200,000
Interest cost	2,000,000	2,200,000	2,400,000
Actuarial loss	4,900,000	0
Benefits paid	(3,800,000)	(4,200,000)
Effect of foreign exchange rate changes	0	0
Benefit obligation at end of year	48,100,000	44,800,000	46,600,000
Change in Fair Value of Plan Assets
Plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Effect of exchange rate changes	0	0
Company contributions	3,800,000	4,200,000
Benefits paid	(3,800,000)	(4,200,000)
Plan assets at end of year	0	0	0
Funded Status at end of year	(48,100,000)	(44,800,000)
Amount Recognized
Other liabilities	(48,100,000)	(44,800,000)
Accumulative other comprehensive loss:
Net actuarial loss	6,800,000	1,800,000
Prior service credit (cost)	200,000	0
Accumulated other comprehensive loss	7,000,000	1,800,000
Total recognized	(41,100,000)	(43,000,000)
After-tax amount recognized in accumulated other comprehensive loss	$ 4,300,000	$ 1,100,000

XML

Shareholders' Equity (Details) In Millions, unless otherwise specified	Dec. 31, 2012
Common stock reserved for conversion and incentive plans
Common stock reserved for conversion and incentive plans	6.6
Conversion of outstanding preferred stock [Member]
Common stock reserved for conversion and incentive plans
Common stock reserved for conversion and incentive plans	0.1
GATX Corporation 2004 Equity Incentive Compensation Plan [Member]
Common stock reserved for conversion and incentive plans
Common stock reserved for conversion and incentive plans	6.5

XML

Pension and Other Post-Retirement Benefits (Tables)

12 Months Ended

Dec. 31, 2012

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Pension obligations and plan assets and other post-retirement obligations

The following tables set forth pension obligations and plan assets and other post-retirement obligations as of December 31 (in millions):

	2012			2011			2012			2011
							Retiree Health and Life			Retiree Health and Life
	Pension Benefits			Pension Benefits
Change in Benefit Obligation
Benefit obligation at beginning of year	$	425.0		$	413.2		$	44.8		$	46.6
Service cost	5.7			5.4			0.2			0.2
Interest cost	19.7			20.7			2.0			2.2
Actuarial loss	49.2			13.5			4.9			—
Benefits paid	(27.4		)	(27.5		)	(3.8		)	(4.2		)
Effect of foreign exchange rate changes	1.6			(0.3		)	—			—
Benefit obligation at end of year	$	473.8		$	425.0		$	48.1		$	44.8
Change in Fair Value of Plan Assets
Plan assets at beginning of year	377.5			392.7			—			—
Actual return on plan assets	55.3			10.2			—			—
Effect of exchange rate changes	1.6			(0.1		)	—			—
Company contributions	2.1			2.2			3.8			4.2
Benefits paid	(27.4		)	(27.5		)	(3.8		)	(4.2		)
Plan assets at end of year	$	409.1		$	377.5		$	—		$	—
Funded Status at end of year	$	(64.7	)	$	(47.5	)	$	(48.1	)	$	(44.8	)
Amount Recognized
Other liabilities	$	(64.7	)	$	(47.5	)	$	(48.1	)	$	(44.8	)
Accumulative other comprehensive loss:
Net actuarial loss	207.4			193.5			6.8			1.8
Prior service credit (cost)	(4.1		)	(5.1		)	0.2			—
Accumulated other comprehensive loss	203.3			188.4			7.0			1.8
Total recognized	$	138.6		$	140.9		$	(41.1	)	$	(43.0	)
After-tax amount recognized in accumulated other comprehensive loss	$	126.8		$	117.6		$	4.3		$	1.1

Pension plans with a projected benefit obligation in excess of plan assets

Information for pension plans with a projected benefit obligation in excess of plan assets is as followes as of December 31 (in millions):

	2012		2011
Projected benefit obligations	$	473.8	$	425.0
Fair value of plan assets	409.1		377.5

Pension plans with an accumulated benefit obligation in excess of plan assets

Information for pension plans with an accumulated benefit obligation in excess of plan assets is as follows as of December 31 (in millions):

	2012		2011
Accumulated benefit obligations	$	453.7	$	408.9
Fair value of plan assets	409.1		377.5

Components of pension and other post retirement benefit costs

The components of net periodic (benefit) cost for the year ended December 31 were (in millions):

										2012 Retiree Health and Life			2011 Retiree Health and Life			2010 Retiree Health and Life
	2012 Pension Benefits			2011 Pension Benefits			2010 Pension Benefits
Service cost	$	5.7		$	5.4		$	5.3		$	0.2		$	0.2		$	0.2
Interest cost	19.7			20.7			22.1			2.0			2.2			2.4
Expected return on plan assets	(29.6		)	(33.2		)	(33.5		)	—			—			—
Amortization of:
Unrecognized prior service credit	(1.0		)	(1.0		)	(1.0		)	(0.1		)	(0.1		)	(0.1		)
Unrecognized net actuarial loss (gain)	9.9			7.2			6.0			(0.1		)	(0.3		)	(0.3		)
Net periodic (benefit) cost	$	4.7		$	(0.9	)	$	(1.1	)	$	2.0		$	2.0		$	2.2

Schedule of amounts in accumulated other comprehensive loss (gain) to be recognized over next fiscal year

As of December 31, 2012, GATX expects within the next twelve months to recognize the following amounts included in accumulated other comprehensive loss (gain) as components of net periodic cost (in millions):

	2013
	Pension Benefits			Retiree Health and Life
Unrecognized net actuarial loss (gain)	$	14.0		$	(0.2	)
Unrecognized prior service credit	(1.0		)	(0.1		)

Expected long term return on assets and to measure the periodic cost

GATX used the following assumptions to measure the benefit obligation, compute the expected long-term return on assets and measure the periodic cost for GATX’s defined benefit pension plans and other post-retirement benefit plans for the years ended December 31:

	2012		2011
Domestic defined benefit pension plans
Benefit Obligation at December 31:
Discount rate — salaried funded and unfunded plans	3.95	%	4.80	%
Discount rate — hourly funded plan	4.05	%	4.85	%
Rate of compensation increases — salaried funded and unfunded plans	3.00	%	3.00	%
Rate of compensation increases — hourly funded plans	N/A		N/A
Net Periodic Cost (Benefit) for the years ended December 31:
Discount rate — salaried funded and unfunded plans	4.80	%	5.25	%
Discount rate — hourly funded plan	4.85	%	5.25	%
Expected return on plan assets — salaried funded plan	8.05	%	8.65	%
Expected return on plan assets — hourly funded plan	7.10	%	7.80	%
Rate of compensation increases — salaried funded and unfunded plans	3.00	%	4.50	%
Rate of compensation increases — hourly funded plan	N/A		N/A
Foreign defined benefit pension plan
Benefit Obligation at December 31:
Discount rate	4.25	%	4.65	%
Rate of pension-in-payment increases	3.00	%	2.90	%
Net Periodic Cost (Benefit) for the years ended December 31:
Discount rate	4.65	%	5.40	%
Expected return on plan assets	5.77	%	6.12	%
Rate of pension-in-payment increases	2.90	%	3.40	%
Other post-retirement benefit plans
Benefit Obligation at December 31:
Discount rate - salaried health	3.65	%	4.50	%
Discount rate - hourly health	3.60	%	4.60	%
Discount rate - salaried life insurance	3.90	%	4.75	%
Discount rate - hourly life insurance	3.45	%	4.45	%
Rate of compensation increases	N/A		N/A
Net Periodic Cost (Benefit) for the years ended December 31:
Discount rate - salaried health	4.50	%	4.95	%
Discount rate - hourly health	4.60	%	4.95	%
Discount rate - salaried life insurance	4.75	%	4.95	%
Discount rate - hourly life insurance	4.45	%	4.95	%
Rate of compensation increases	N/A		N/A

Review of historical returns

GATX routinely reviews its historical returns along with current market conditions to ensure its expected return assumption is reasonable and appropriate.

	2012		2011
Assumed Health Care Cost Trend Rates at December 31
Health care cost trend assumed for next year
Medical claims	7.00	%	7.50	%
Prescription drugs claims	6.50	%	7.50	%
Rate to which the cost trend is expected to decline (the ultimate trend rate)
Medical claims	5.00	%	5.00	%
Prescription drugs claims	5.00	%	5.00	%
Year that rate reaches the ultimate trend rate
Medical claims	2019		2018
Prescription drugs claims	2017		2018

Effect on the other post-retirement benefit cost and obligation

A one-percentage-point change in the trend rate would have the following effects (in millions):

	One-Percentage-Point Increase		One-Percentage-Point Decrease
Effect on total of service and interest cost	$	0.1	$	(0.1	)
Effect on post-retirement benefit obligation	2.5		(2.2		)

Pension plan assets fair value

The following tables set forth the fair value of GATX’s pension plan assets as of December 31 (in millions):

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs  ( Level 3)		Total December 31,
							2012
Assets
Short-term investment funds	$	1.0	$	—	$	—	$	1.0
Common stock	10.3		—		—		10.3
Common stock collective funds	—		245.0		—		245.0
Fixed income collective trust funds	—		131.2		—		131.2
Real estate collective trust funds	—		21.6		—		21.6
Total	$	11.3	$	397.8	$	—	$	409.1

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs  ( Level 3)		Total December 31,
							2011
Assets
Short-term investment funds	$	2.9	$	—	$	—	$	2.9
Common stock	8.9		—		—		8.9
Common stock collective funds	—		222.5		—		222.5
Fixed income collective trust funds	—		125.3		—		125.3
Real estate collective trust funds	—		17.9		—		17.9
Total	$	11.8	$	365.7	$	—	$	377.5

Schedule of Expected Benefit Payments

The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid (in millions):

	Funded Plans		Unfunded Plans		Retiree Health and Life
2013	$	29.2	$	2.0	$	4.4
2014	29.0		1.9		4.3
2015	29.0		1.8		4.0
2016	29.3		2.0		3.9
2017	31.1		2.0		3.6
Years 2018-2022	148.3		11.9		15.0
	$	295.9	$	21.6	$	35.2

Expected Subsidies To Be Received

The following are estimated Medicare Part D Subsidies expected to be received as a result of the Medicare Prescription Drug, Improvement and Modernization Act of 2003 (in millions):

2013	$	0.5
2014	0.5
2015	0.5
2016	0.5
2017	0.4
Years 2018-2022	2.2
	$	4.6

Contributions to Multiemployer Benefit Plans

GATX’s contributions to multiemployer benefit plans for the years indicated were as follows (in millions):

Multiemployer Plans	EIN and Pension Plan Number	Pension Protection Act Zone Status (b)	GATX Contributions						Collective Bargaining Agreement Expiration Date
			2012		2011		2010
American Maritime Officers Pension Plan (a)	13-1969709-001	Endangered-Yellow	$	1.5	$	2.1	$	2.2	January 15, 2017
Other multiemployer post-retirement plans			6.6		6.4		6.2
Total			$	8.1	$	8.5	$	8.4

__________________

(a)GATX's contributions represented more than 5% of the total contributions to the plan during each year and no surcharge was imposed for any year.

Foreign Funded Pension Plans, Defined Benefit [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Weighted-average asset allocations of domestic funded pension plans

GATX’s weighted-average asset allocations of its foreign funded pension plan at December 31, 2012 and 2011, and current target asset allocation for 2013, by asset category, are as follows:

			Plan Assets at December 31
	Target		2012		2011
Asset Category
Equity securities	36.8	%	36.2	%	36.1	%
Debt securities	63.2	%	63.8	%	63.9	%
	100.0	%	100.0	%	100.0	%

Domestic defined benefit pension plans [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Weighted-average asset allocations of domestic funded pension plans

GATX’s weighted-average asset allocations of its domestic funded pension plans at December 31, 2012 and 2011, and current target asset allocation for 2012, by asset category, are as follows:

			Plan Assets at December 31
	Target		2012		2011
Asset Category
Equity securities	66.0	%	65.3	%	64.1	%
Debt securities	29.0	%	28.9	%	30.1	%
Real estate	5.0	%	5.8	%	5.2	%
Cash	—		—		0.6	%
	100.0	%	100.0	%	100.0	%

XML

Significant Accounting Policies (Details 1)	12 Months Ended
	Dec. 31, 2012
Minimum [Member] | Railcars [Member]
Estimated lives of useful depreciable assets
Estimated useful lives of depreciable assets, minimum	30 years
Minimum [Member] | Locomotives [Member]
Estimated lives of useful depreciable assets
Estimated useful lives of depreciable assets, minimum	10 years
Minimum [Member] | Buildings [Member]
Estimated lives of useful depreciable assets
Estimated useful lives of depreciable assets, minimum	40 years
Minimum [Member] | Leasehold Improvements [Member]
Estimated lives of useful depreciable assets
Estimated useful lives of depreciable assets, minimum	5 years
Minimum [Member] | Marine vessels [Member]
Estimated lives of useful depreciable assets
Estimated useful lives of depreciable assets, minimum	30 years
Minimum [Member] | Industrial Equipment [Member]
Estimated lives of useful depreciable assets
Estimated useful lives of depreciable assets, minimum	5 years
Maximum [Member] | Railcars [Member]
Estimated lives of useful depreciable assets
Estimated useful lives of depreciable assets, minimum	38 years
Maximum [Member] | Locomotives [Member]
Estimated lives of useful depreciable assets
Estimated useful lives of depreciable assets, minimum	20 years
Maximum [Member] | Buildings [Member]
Estimated lives of useful depreciable assets
Estimated useful lives of depreciable assets, minimum	50 years
Maximum [Member] | Leasehold Improvements [Member]
Estimated lives of useful depreciable assets
Estimated useful lives of depreciable assets, minimum	15 years
Maximum [Member] | Marine vessels [Member]
Estimated lives of useful depreciable assets
Estimated useful lives of depreciable assets, minimum	65 years
Maximum [Member] | Industrial Equipment [Member]
Estimated lives of useful depreciable assets
Estimated useful lives of depreciable assets, minimum	30 years

XML

Investments in Affiliated Companies (Textual) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011 Vessel	Dec. 31, 2010
Schedule of Equity Method Investments [Line Items]
Loans to affiliated companies	$ 51.3	$ 57.7
Asset Impairment Charges	5.0	6.8	8.3
Impairment loss		5.2
GATX ownership percentage in joint venture		45.00%
Contribution for payment of outstanding debt on dissolution		62.1
Number of vessels containing liquidating distributions		6
Fair value of vessels received on dissolution		88.8
Share of affiliates' earnings (net of tax)	19.6	32.4	28.5
RRPF Joint Ventures [Member]
Schedule of Equity Method Investments [Line Items]
GATX ownership percentage in joint venture	50.00%
Number of joint venture investments	14
Number of business activities	2
Share of affiliates' earnings (net of tax)	36.7	30.8	25.4
RRPF Joint Ventures [Member] | Minimum [Member]
Schedule of Equity Method Investments [Line Items]
Lease term	7 years
RRPF Joint Ventures [Member] | Maximum [Member]
Schedule of Equity Method Investments [Line Items]
Lease term	10 years
RRPF Joint Ventures [Member] | Aircraft Engines [Member]
Schedule of Equity Method Investments [Line Items]
Estimated useful lives of depreciable assets	25 years
Fair Value, Measurements, Nonrecurring [Member] | Investments Impairment Charge [Member] | Fair Value, Inputs, Level 3 [Member] | Equity Method Investments [Member]
Schedule of Equity Method Investments [Line Items]
Asset Impairment Charges	$ 14.8

XML

Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Assets
Cash and Cash Equivalents	$ 234.2		$ 248.4
Restricted Cash	29.7		35.2
Receivables
Rent and other receivables	88.4		76.7
Loans	27.2		30.4
Finance leases	245.7		334.9
Less: allowance for losses	(4.6)		(11.8)
Receivables, net	356.7		430.2
Operating Assets and Facilities
Operating Assets and Facilities (includes $123.1 and $123.5 relating to a consolidated VIE at December 31, 2012 and 2011, respectively)	6,855.2		6,416.0
Less: allowance for depreciation (includes $24.7 and $19.2 relating to a consolidated VIE at December 31, 2012 and 2011, respectively)	(2,200.8)		(2,056.7)
Operating assets and facilities, net	4,654.4		4,359.3
Investments in Affiliated Companies	502.0		513.8
Goodwill	91.7		90.5
Other Assets	186.7		180.1
Total Assets	6,055.4		5,857.5
Liabilities and Shareholders’ Equity
Accounts Payable and Accrued Expenses	177.4		135.6
Debt
Commercial paper and borrowings under bank credit facilities	273.6		28.6
Recourse	3,152.4		3,354.8
Nonrecourse (includes $35.1 and $45.2 relating to a consolidated VIE at December 31, 2012 and 2011, respectively)	130.6		149.4
Capital lease obligations	11.3		14.3
Total Debt	3,567.9		3,547.1
Deferred Income Taxes	783.0		765.9
Other Liabilities	282.9		281.6
Total Liabilities	4,811.2		4,730.2
Shareholders’ Equity
Preferred stock ($1.00 par value, 5,000,000 shares authorized, 15,567 and 16,644 shares of Series A and B $2.50 Cumulative Convertible Preferred Stock issued and outstanding, aggregate liquidation preference of $0.9 million and $1.0 million as of December 31, 2012 and 2011, respectively)		[1]		[1]
Common stock ($0.625 par value, 120,000,000 shares authorized, 66,021,444 and 65,775,568 shares issued and 46,898,924 and 46,653,048 shares outstanding as of December 31, 2012 and 2011, respectively)	41.2		41.1
Additional paid in capital	658.5		644.4
Retained earnings	1,249.4		1,171.2
Accumulated other comprehensive loss	(144.6)		(169.1)
Treasury stock at cost (19,122,520 shares at December 31, 2012 and 2011)	(560.3)		(560.3)
Total Shareholders’ Equity	1,244.2		1,127.3
Total Liabilities and Shareholders’ Equity	$ 6,055.4		$ 5,857.5

[1] * Less than $0.1

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Allowance for Losses (Tables)

12 Months Ended

Dec. 31, 2012

Receivables [Abstract]

Changes in the allowance for possible losses

The following summarizes changes in the allowance for losses at December 31 (in millions):

	2012			2011
Beginning balance	$	11.8		$	11.6
(Reversal) provision for losses	(0.6		)	0.2
Charges to allowance	(7.8		)	(0.5		)
Recoveries and other, including foreign exchange adjustments	1.2			0.5
Ending balance	$	4.6		$	11.8

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Share Based Compensation (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Weighted Average Estimated Fair Value
Weighted average estimated fair value	$ 18.48	$ 13.88	$ 11.13
Quarterly dividend rate	$ 0.29	$ 0.29	$ 0.28
Expected term of SAR, in years	4 years 8 months 15 days	4 years 3 months 19 days	4 years 3 months 19 days
Risk-free interest rate	1.00%	1.60%	2.00%
Dividend yield	2.70%	3.40%	4.30%
Expected stock price volatility	43.30%	41.90%	41.80%
Present value of dividends	$ 5.37	$ 4.76	$ 4.55

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Other Assets and Other Liabilities (Details 1) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Components of Other Liabilities reported on the consolidated balance sheets
Accrued operating lease expense	$ 56.3	$ 67.3
Pension and other post-retirement liabilities	112.8	92.3
Deferred gains on sale-leasebacks	47.2	34.9
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	3.2	18.8
Environmental reserves	15.6	16.7
Deferred income	11.8	15.4
Derivatives	3.4	2.4
Other Liabilities, Noncurrent	32.6	33.8
Total	$ 282.9	$ 281.6

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Consolidated Statements of Changes in Shareholders' Equity (USD $) In Millions, except Share data, unless otherwise specified		Total		Preferred Stock [Member]		Common stock [Member]	Treasury Stock [Member]	Additional Paid In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income [Member]
Balance at beginning of period, Common Stock at Dec. 31, 2009						$ 40.6
Balance at beginning of period, Preferred Stock, less than $0.1 at Dec. 31, 2009	[1]
Balance at beginning of period at Dec. 31, 2009							(560.3)	616.8	1,090.0	(84.5)
Balance at beginning of period, Preferred Stock, less than 0.1, Shares at Dec. 31, 2009	[1]
Balance at beginning of period, Treasury Stock, Shares at Dec. 31, 2009							(19,100,000)
Balance at beginning of period, Common Stock, Shares at Dec. 31, 2009						65,200,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of preferred stock into common stock, Shares	[1]
Conversion of preferred stock into common stock	[1]
Issuance of common stock, Shares						200,000
Issuance of common stock						0.2		2.3
Convertible debt conversions, Shares						100,000
Convertible debt conversions						0.1		(0.1)
Share-based compensation effects								7.2
Net income		80.8							80.8
Dividends declared									(53.9)
Other comprehensive income (loss)		(25.5)								(25.5)
Balance at end of period, Common Stock at Dec. 31, 2010						40.9
Balance at end of period, Preferred Stock, less than $0.1 at Dec. 31, 2010	[1]
Balance at end of period at Dec. 31, 2010		1,113.7					(560.3)	626.2	1,116.9	(110.0)
Balance at end of period, Preferred Stock, less than 0.1, Shares at Dec. 31, 2010	[1]
Balance at end of period, Treasury Stock, Shares at Dec. 31, 2010							(19,100,000)
Balance at end of period, Common Stock, Shares at Dec. 31, 2010						65,500,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of preferred stock into common stock, Shares	[1]
Conversion of preferred stock into common stock	[1]
Issuance of common stock, Shares						300,000
Issuance of common stock						0.2		6.4
Convertible debt conversions, Shares						0
Convertible debt conversions						0		0
Share-based compensation effects								11.8
Net income		110.8							110.8
Dividends declared									(56.5)
Other comprehensive income (loss)		(59.1)								(59.1)
Balance at end of period, Common Stock at Dec. 31, 2011		41.1				41.1
Balance at end of period, Preferred Stock, less than $0.1 at Dec. 31, 2011			[2]		[1]
Balance at end of period at Dec. 31, 2011		1,127.3					(560.3)	644.4	1,171.2	(169.1)
Balance at end of period, Preferred Stock, less than 0.1, Shares at Dec. 31, 2011	[1]
Balance at end of period, Treasury Stock, Shares at Dec. 31, 2011							(19,100,000)
Balance at end of period, Common Stock, Shares at Dec. 31, 2011		65,775,568				65,800,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of preferred stock into common stock, Shares	[1]
Conversion of preferred stock into common stock	[1]
Issuance of common stock, Shares						200,000
Issuance of common stock						0.1		2.9
Convertible debt conversions, Shares						0
Convertible debt conversions						0		0
Share-based compensation effects								11.2
Net income		137.3							137.3
Dividends declared									(59.1)
Other comprehensive income (loss)		24.5								24.5
Balance at end of period, Common Stock at Dec. 31, 2012		41.2				41.2
Balance at end of period, Preferred Stock, less than $0.1 at Dec. 31, 2012			[2]		[1]
Balance at end of period at Dec. 31, 2012		$ 1,244.2						$ 658.5	$ 1,249.4	$ (144.6)
Balance at end of period, Preferred Stock, less than 0.1, Shares at Dec. 31, 2012	[1]
Balance at end of period, Common Stock, Shares at Dec. 31, 2012		66,021,444				66,000,000

[1] Less than $0.1

[2] * Less than $0.1

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Pension and Other Post Retirement Benefits (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2012 Postretirement_Plan	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Number of Postretirement Plans	2
Pension and Other Post Retirement Details (Textual) [Abstract]
Collective bargaining agreement, beginning	2012-01
Previous collective bargaining agreement, expiration	2011-08
Defined benefit plan, employer contributions	$ 1,600,000	$ 1,400,000	$ 0
Multiemployer plan contributions	5.00%
Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of days notice upon which redemptions from real estate funds are available	45 days
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of days notice upon which redemptions from real estate funds are available	60 days
Defined Benefit Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Aggregate accumulated benefit obligation	453,700,000	408,900,000
Unrecognized net actuarial loss (gain)	9,900,000	7,200,000	6,000,000
Prior Service Credit	(1,000,000)	(1,000,000)	(1,000,000)
Defined benefit plan, estimated future employer contributions in next fiscal year	7,000,000
Pension and Other Post Retirement Details (Textual) [Abstract]
Defined benefit plan, employer contributions	2,100,000	2,200,000
Other Post-retirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Unrecognized net actuarial loss (gain)	(100,000)	(300,000)	(300,000)
Prior Service Credit	(100,000)	(100,000)	(100,000)
Pension and Other Post Retirement Details (Textual) [Abstract]
Defined benefit plan, employer contributions	$ 3,800,000	$ 4,200,000

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Leases (Details 1) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012
Minimum Future Receipts
2013, Finance Leases	$ 40.2
2014, Finance Leases	38.7
2015, Finance Leases	35.9
2016, Finance Leases	31.3
2017, Finance Leases	29.4
Years thereafter, Finance Leases	151.8
Total, Finance Leases	327.3
2013, Operating Leases	784.4	[1]
2014, Operating Leases	594.2	[1]
2015, Operating Leases	465.8	[1]
2016, Operating Leases	346.1	[1]
2017, Operating Leases	223.0	[1]
Years thereafter, Operating Leases	461.7	[1]
Total future receipts from leases	2,875.2	[1]
2013, Total	824.6
2014, Total	632.9
2015, Total	501.7
2016, Total	377.4
2017, Total	252.4
Years thereafter, Total	613.5
Total	$ 3,202.5

[1] The future contractual receipts due under operating leases include executory costs in the case of GATX's full service leases.

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Share Based Compensation (Details Textual) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Additional Share Based Compensation (Textual) [Abstract]
Total intrinsic value of options/SARs exercised	$ 4.9
Outstanding Stock Units	1,872,000	1,879,000
Share Based Compensation (Textual) [Abstract]
Shares of common stock authorized under the 2004 Plan	3,500,000
Common Stock, Capital Shares Reserved for Future Issuance	3,500,000
Share-based compensation expense	12.2	11.0	8.0
Tax benefits	4.6	4.1	3.0
Vesting period for the 2012 SAR grant	3 years
Portion of an award vesting for the 2012 SAR grant	1/3 vesting after each year
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Percentage	33.33%
Stock Option SAR Awards [Member]
Additional Share Based Compensation (Textual) [Abstract]
Total intrinsic value of options/SARs exercised	4.9	4.5	1.0
Unrecognized compensation expense	6.3
Weighted average period	1 year 8 months 15 days
Restricted Stock and Performance Share Awards [Member]
Additional Share Based Compensation (Textual) [Abstract]
Unrecognized compensation expense	$ 6.6
Weighted average period	1 year 9 months 22 days
Total Fair Value of Shares, Vested	$ 5,600,000.00	$ 2,700,000.00	$ 2,500,000.00
Phantom Stock Units [Member]
Additional Share Based Compensation (Textual) [Abstract]
Phantom Stock Units	20,722
Outstanding Stock Units	135,261
Stock Options/SARs Granted Since 2004 [Member]
Share Based Compensation (Textual) [Abstract]
Maximum granting period for stock option	7 years

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Leases (Tables)

12 Months Ended

Dec. 31, 2012

Leases [Abstract]

Components of GATX's finance leases

The components of GATX’s finance leases as of December 31 were (in millions):

	Leveraged Leases					Direct Financing						Total Finance Leases
	2012		2011			2012			2011			2012			2011
Total contractual lease payments receivable	$	—	$	617.0		$	327.3		$	341.4		$	327.3		$	958.4
Principal and interest on third-party nonrecourse debt			(518.6		)	—			—			—			(518.6		)
Net contractual future lease receivable	—		98.4			327.3			341.4			327.3			439.8
Estimated non-guaranteed residual value of leased assets	—		20.9			86.9			93.7			86.9			114.6
Unearned income	—		(31.8		)	(168.5		)	(187.7		)	(168.5		)	(219.5		)
Finance leases	—		87.5			245.7			247.4			245.7			334.9
Allowance for losses	—		(9.0		)	—			—			—			(9.0		)
Deferred taxes	—		(62.7		)	—			—			—			(62.7		)
Net investment in finance leases	$	—	$	15.8		$	245.7		$	247.4		$	245.7		$	263.2

Minimum Future Receipts

Future contractual receipts from finance leases and noncancelable operating leases as of December 31, 2012, were (in millions):

	Finance Leases		Operating Leases *		Total
2013	$	40.2	$	784.4	$	824.6
2014	38.7		594.2		632.9
2015	35.9		465.8		501.7
2016	31.3		346.1		377.4
2017	29.4		223.0		252.4
Years thereafter	151.8		461.7		613.5
	$	327.3	$	2,875.2	$	3,202.5

Assets that are financed with capital lease obligations

Assets that are financed with capital lease obligations as of December 31 were (in millions):

	2012			2011
Railcars	$	—		$	3.6
Marine vessels	79.9			79.0
	79.9			82.6
Less: allowance for depreciation	(67.9		)	(67.7		)
	$	12.0		$	14.9

Future minimum rental payments due under noncancelable operating leases

Future contractual rental payments due under noncancelable leases as of December 31, 2012, were (in millions):

	Capital Leases			Recourse Operating Leases (a)		Nonrecourse Operating Leases (b)
2013	$	3.1		$	115.3	$	27.9
2014	3.1			119.7		27.4
2015	3.1			139.7		26.0
2016	2.7			101.5		21.9
2017	1.1			89.3		22.5
Years thereafter	—			417.4		75.3
	$	13.1		$	982.9	$	201.0
Less: amounts representing interest	(1.8		)
Present value of future contractual capital lease payments	$	11.3

__________

(a) The contractual rental payments do not include the costs of licenses, taxes, insurance, and maintenance, for which GATX is required to pay.

(b) The amounts shown for nonrecourse operating leases primarily reflect the rental payments of two wholly-owned bankruptcy-remote, SPCs. These rentals are consolidated for accounting purposes, but do not represent legal obligations of GATX.

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Investments in Affiliated Companies (Investments and Distributions) (Details 3) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule of Equity Method Investments [Line Items]
Payments to Acquire Equity Method Investments	$ 29.7	$ 116.2	$ 64.7
Proceeds from Equity Method Investment, Dividends or Distributions	65.7	35.3	54.7
Rail North America [Member]
Schedule of Equity Method Investments [Line Items]
Payments to Acquire Equity Method Investments	0	0	36.8
Proceeds from Equity Method Investment, Dividends or Distributions	14.9	8.0	9.7
Rail International [Member]
Schedule of Equity Method Investments [Line Items]
Payments to Acquire Equity Method Investments	0	2.8	0
Proceeds from Equity Method Investment, Dividends or Distributions	0	0	0
Portfolio Management [Member]
Schedule of Equity Method Investments [Line Items]
Payments to Acquire Equity Method Investments	29.7	113.4	27.9
Proceeds from Equity Method Investment, Dividends or Distributions	$ 50.8	$ 27.3	$ 45.0

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Goodwill

12 Months Ended

Dec. 31, 2012

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill

Goodwill

Goodwill was $91.7 million and $90.5 million as of December 31, 2012 and 2011, respectively. In the fourth quarter of 2012, GATX performed a review for impairment of goodwill, concluding that goodwill was not impaired. For 2012 and 2011, changes in the carrying amount of GATX’s goodwill, all of which pertains to Rail North America and Rail International, were the result of changes in foreign currency exchange rates.

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Investments in Affiliated Companies (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Equity Method Investments [Line Items]

Significant Investments in Affiliated Companies, by Segment

The following table presents GATX's most significant investments in affiliated companies and related percentage of ownership, by segment, as of December 31, 2012 (in millions):

	Segment	GATX’s Investment		GATX’s Percentage Ownership
Rolls-Royce & Partners Finance *	Portfolio Management	$	208.7	50.0	%
AAE Cargo AG	Rail International	74.7		37.5	%
Cardinal Marine Investments, LLC	Portfolio Management	52.6		50.0	%
Singco Gas Pte, Limited	Portfolio Management	40.5		50.0	%
Enerven Compression, LLC	Portfolio Management	32.9		45.6	%
Adler Funding, LLC	Rail North America	26.7		12.5	%
Southern Capital Corporation	Rail North America	20.2		50.0	%
Intermodal Investment Fund V	Portfolio Management	18.1		50.0	%
Somargas II Private Limited	Portfolio Management	15.4		35.0	%
Other affiliates		12.2		various
Investments in Affiliated Companies		$	502.0

__________

(*) Combined investment balances of fourteen separate joint ventures (collectively, the "RRPF Affiliates")

Equity Method Investments, Earnings by Segment

The following table shows GATX’s share of affiliates’ earnings by segment for the years ending December 31 (in millions):

	2012			2011			2010
Rail North America	$	6.5		$	3.9		$	7.2
Rail International	(18.3		)	0.5			(6.0		)
Portfolio Management	33.4			36.2			36.9
Share of affiliates' earnings (pre-tax)	21.6			40.6			38.1
Income taxes	(2.0		)	(8.2		)	(9.6		)
Share of Affiliates' Earnings	$	19.6		$	32.4		$	28.5

Equity method Investments, Investments and Distributions

The following table summarizes GATX's cash investments in and distributions from affiliates for the years ended December 31 (in millions):

	Cash Investments						Cash Distributions
	2012		2011		2010		2012		2011		2010
Rail North America	$	—	$	—	$	36.8	$	14.9	$	8.0	$	9.7
Rail International	—		2.8		—		—		—		—
Portfolio Management	29.7		113.4		27.9		50.8		27.3		45.0
	$	29.7	$	116.2	$	64.7	$	65.7	$	35.3	$	54.7

Outstanding Guarantees Related to Affiliated Companies [Table Text Block]

The following guarantees, as described in Note 14, related to GATX's affiliated companies were outstanding as of December 31 (in millions). The amount shown below excludes an affiliate guarantee for which no stated maximum potential future payment is provided and for which the likelihood of performance under the guarantee is considered remote.

	2012		2011
Loan payment guarantees	$	42.0	$	42.0

Equity Method Investments, Guarantees

Investments in Affiliated Companies

Investments in affiliated companies represent investments in and loans to domestic and foreign affiliates that are in businesses similar to those of GATX, primarily companies offering lease financing and related services for customers operating rail and marine assets, as well as companies that lease aircraft engines. As of December 31, 2012 and 2011, loan amounts included were $51.3 million and $57.7 million, respectively.

In 2012, GATX's gas compression equipment leasing affiliate, Enerven Compression, LLC ("Enerven"), sold substantially all of its assets and is in the process of liquidation. In connection with the disposition, GATX recognized an impairment loss of $14.8 million, which is reflected in share of affiliates' earnings. In 2011, the Clipper Fourth Limited and Clipper Fourth APS marine affiliates, in each of which GATX held a 45% interest, were dissolved. In connection with the dissolutions, GATX contributed $62.1 million, representing its share of the Clipper affiliates' outstanding debt, received liquidating distributions of six vessels with an aggregate fair value of $88.8 million and recognized an impairment loss of $5.2 million, which is reflected in share of affiliates’ earnings.

The following table presents GATX's most significant investments in affiliated companies and related percentage of ownership, by segment, as of December 31, 2012 (in millions):

	Segment	GATX’s Investment		GATX’s Percentage Ownership
Rolls-Royce & Partners Finance *	Portfolio Management	$	208.7	50.0	%
AAE Cargo AG	Rail International	74.7		37.5	%
Cardinal Marine Investments, LLC	Portfolio Management	52.6		50.0	%
Singco Gas Pte, Limited	Portfolio Management	40.5		50.0	%
Enerven Compression, LLC	Portfolio Management	32.9		45.6	%
Adler Funding, LLC	Rail North America	26.7		12.5	%
Southern Capital Corporation	Rail North America	20.2		50.0	%
Intermodal Investment Fund V	Portfolio Management	18.1		50.0	%
Somargas II Private Limited	Portfolio Management	15.4		35.0	%
Other affiliates		12.2		various
Investments in Affiliated Companies		$	502.0

__________

(*) Combined investment balances of fourteen separate joint ventures (collectively, the "RRPF Affiliates")

The following table shows GATX’s share of affiliates’ earnings by segment for the years ending December 31 (in millions):

	2012			2011			2010
Rail North America	$	6.5		$	3.9		$	7.2
Rail International	(18.3		)	0.5			(6.0		)
Portfolio Management	33.4			36.2			36.9
Share of affiliates' earnings (pre-tax)	21.6			40.6			38.1
Income taxes	(2.0		)	(8.2		)	(9.6		)
Share of Affiliates' Earnings	$	19.6		$	32.4		$	28.5

The following table summarizes GATX's cash investments in and distributions from affiliates for the years ended December 31 (in millions):

	Cash Investments						Cash Distributions
	2012		2011		2010		2012		2011		2010
Rail North America	$	—	$	—	$	36.8	$	14.9	$	8.0	$	9.7
Rail International	—		2.8		—		—		—		—
Portfolio Management	29.7		113.4		27.9		50.8		27.3		45.0
	$	29.7	$	116.2	$	64.7	$	65.7	$	35.3	$	54.7

The following guarantees, as described in Note 14, related to GATX's affiliated companies were outstanding as of December 31 (in millions). The amount shown below excludes an affiliate guarantee for which no stated maximum potential future payment is provided and for which the likelihood of performance under the guarantee is considered remote.

	2012		2011
Loan payment guarantees	$	42.0	$	42.0

Summarized Financial Data of Affiliates

Aggregated operating results for all of GATX's affiliated companies for the years ending December 31 were (in millions):

	2012		2011		2010
Revenues	$	651.8	$	645.5	$	636.2
Gains on sales of assets	57.4		21.1		10.9
Net income	75.3		88.5		55.8

Aggregated summarized balance sheet data for all of GATX's affiliated companies as of December 31 were (in millions):

	2012		2011
Current assets	$	311.0	$	404.4
Noncurrent assets	4,781.3		4,724.4
Total assets	$	5,092.3	$	5,128.8
Current liabilities	$	439.7	$	570.7
Noncurrent liabilities	3,739.6		3,671.9
Shareholders’ equity	913.0		886.2
Total liabilities and shareholders' equity	$	5,092.3	$	5,128.8

Summarized Financial Data for the RRPF Affiliates

As noted above, GATX's affiliate investments include a 50% interest in each of the RRPF Affiliates, a collection of fourteen domestic and foreign joint ventures with Rolls-Royce plc (or affiliates thereof, collectively “Rolls-Royce”), a leading manufacturer of commercial aircraft jet engines. The RRPF Affiliates are primarily engaged in two business activities: lease financing of aircraft engines to a diverse group of commercial aircraft operators worldwide and sale-leaseback financing of aircraft engines to Rolls-Royce for use in their engine maintenance programs. These aircraft engines are generally depreciated over a useful life of 25 years to an estimated residual value. Lease terms vary but typically range from 7 to 10 years. Rolls-Royce acts as manager for each of the RRPF Affiliates and also performs substantially all required maintenance activities. GATX's share of affiliates' earnings (after-tax) from the RRPF Affiliates was $36.7 million, $30.8 million and $25.4 million in 2012, 2011 and 2010, respectively.

The following financial information was derived from the combined financial statements of the RRPF Affiliates.

Condensed income statements for the years ending December 31 (in millions):

	2012			2011			2010
Lease revenue from third parties	$	140.4		$	127.9		$	118.2
Lease revenue from Rolls-Royce	112.9			96.3			94.8
Depreciation expense	(115.1		)	(100.1		)	(89.1		)
Interest expense	(64.8		)	(55.5		)	(54.5		)
Other expenses	(16.3		)	(11.5		)	(9.1		)
Gains on sales of assets	35.9			19.4			3.4
Income before income taxes	93.0			76.5			63.7
Income taxes *	(3.8		)	(3.6		)	(11.6		)
Net income	$	89.2		$	72.9		$	52.1

_________

(*) Represents income taxes directly attributable to the RRPF Affiliates.  Several of the RRPF Affiliates are flow through entities and income taxes are incurred at the shareholder level.

Condensed balance sheets as of December 31 (in millions):

	2012		2011
Current assets	$	84.8	$	104.5
Operating assets, net of accumulated depreciation of $651.8 for 2012 and $568.1 for 2011 *	2,572.2		2,335.5
Other noncurrent assets	14.1		15.0
Total assets	$	2,671.1	$	2,455.0
Current liabilities	$	122.8	$	141.6
Long-term debt	1,955.1		1,796.6
Other liabilities	217.7		201.1
Shareholders’ equity	375.5		315.7
Total liabilities and shareholders' equity	$	2,671.1	$	2,455.0

_________

(*) All operating assets were pledged as collateral for long term debt obligations.

Contractual future lease receipts from noncancelable leases as of December 31, 2012 were as follows (in millions):

	Rolls-Royce		Third Parties		Total
2013	$	120.9	$	133.1	$	254.0
2014	118.9		114.6		233.5
2015	119.7		99.7		219.4
2016	111.3		88.6		199.9
2017	89.4		80.0		169.4
Years thereafter	275.0		182.1		457.1
	$	835.2	$	698.1	$	1,533.3

Maturities of debt obligations as of December 31, 2012, were as follows (in millions):

	Debt Principal
2013	$	64.2
2014	417.1
2015	622.0
2016	359.7
2017	245.6
Years thereafter	288.3
Total debt principal *	$	1,996.9

_________

(*) All debt obligations are nonrecourse to the shareholders.

Equity Method Investments, Summarized Financial Data

Aggregated operating results for all of GATX's affiliated companies for the years ending December 31 were (in millions):

	2012		2011		2010
Revenues	$	651.8	$	645.5	$	636.2
Gains on sales of assets	57.4		21.1		10.9
Net income	75.3		88.5		55.8

Aggregated summarized balance sheet data for all of GATX's affiliated companies as of December 31 were (in millions):

	2012		2011
Current assets	$	311.0	$	404.4
Noncurrent assets	4,781.3		4,724.4
Total assets	$	5,092.3	$	5,128.8
Current liabilities	$	439.7	$	570.7
Noncurrent liabilities	3,739.6		3,671.9
Shareholders’ equity	913.0		886.2
Total liabilities and shareholders' equity	$	5,092.3	$	5,128.8

Schedule of Future Minimum Lease Payments Receivable

Future contractual receipts from finance leases and noncancelable operating leases as of December 31, 2012, were (in millions):

	Finance Leases		Operating Leases *		Total
2013	$	40.2	$	784.4	$	824.6
2014	38.7		594.2		632.9
2015	35.9		465.8		501.7
2016	31.3		346.1		377.4
2017	29.4		223.0		252.4
Years thereafter	151.8		461.7		613.5
	$	327.3	$	2,875.2	$	3,202.5

Schedule of Maturities of Debt Obligations

Maturities of GATX’s debt obligations as of December 31, 2012, were as follows (in millions):

	Debt Principal
2013	$	485.7
2014	513.6
2015	552.5
2016	626.9
2017	236.2
Thereafter	866.2
Total debt principal	$	3,281.1

RRPF Joint Ventures [Member]

Schedule of Equity Method Investments [Line Items]

Equity Method Investments, Summarized Financial Data

Condensed income statements for the years ending December 31 (in millions):

	2012			2011			2010
Lease revenue from third parties	$	140.4		$	127.9		$	118.2
Lease revenue from Rolls-Royce	112.9			96.3			94.8
Depreciation expense	(115.1		)	(100.1		)	(89.1		)
Interest expense	(64.8		)	(55.5		)	(54.5		)
Other expenses	(16.3		)	(11.5		)	(9.1		)
Gains on sales of assets	35.9			19.4			3.4
Income before income taxes	93.0			76.5			63.7
Income taxes *	(3.8		)	(3.6		)	(11.6		)
Net income	$	89.2		$	72.9		$	52.1

_________

(*) Represents income taxes directly attributable to the RRPF Affiliates.  Several of the RRPF Affiliates are flow through entities and income taxes are incurred at the shareholder level.

Condensed balance sheets as of December 31 (in millions):

	2012		2011
Current assets	$	84.8	$	104.5
Operating assets, net of accumulated depreciation of $651.8 for 2012 and $568.1 for 2011 *	2,572.2		2,335.5
Other noncurrent assets	14.1		15.0
Total assets	$	2,671.1	$	2,455.0
Current liabilities	$	122.8	$	141.6
Long-term debt	1,955.1		1,796.6
Other liabilities	217.7		201.1
Shareholders’ equity	375.5		315.7
Total liabilities and shareholders' equity	$	2,671.1	$	2,455.0

_________

(*) All operating assets were pledged as collateral for long term debt obligations.

Schedule of Future Minimum Lease Payments Receivable

Contractual future lease receipts from noncancelable leases as of December 31, 2012 were as follows (in millions):

	Rolls-Royce		Third Parties		Total
2013	$	120.9	$	133.1	$	254.0
2014	118.9		114.6		233.5
2015	119.7		99.7		219.4
2016	111.3		88.6		199.9
2017	89.4		80.0		169.4
Years thereafter	275.0		182.1		457.1
	$	835.2	$	698.1	$	1,533.3

Schedule of Maturities of Debt Obligations

Maturities of debt obligations as of December 31, 2012, were as follows (in millions):

	Debt Principal
2013	$	64.2
2014	417.1
2015	622.0
2016	359.7
2017	245.6
Years thereafter	288.3
Total debt principal *	$	1,996.9

_________

(*) All debt obligations are nonrecourse to the shareholders.

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Share Based Compensation (Details 2) (USD $)				12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Restricted Stock [Member]	Dec. 31, 2012 Performance Shares [Member]
Restricted Stock and Performance Share Activity
Nonvested at beginning of the year, Number of Shares				333,837	188,434
Number of share, Granted				75,580	76,780
Net increase due to estimated performance					9,567
Number of Share, Vested				(134,508)	(85,575)
Number of share, Forfeited				(7,919)
Nonvested at end of the year, Number of Shares				266,990	189,206
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Nonvested at beginning of the year, weighted average fair value	$ 18.48	$ 13.88	$ 11.13	$ 29.04	$ 30.36
Weighted average fair value, Granted				$ 43.71	$ 44.02
Weighted average fair value, Increase					$ 40.81
Weighted average fair value, Vested				$ 25.10	$ 25.96
Weighted average fair value, Forfeited				$ 33.87
Nonvested at end of the year, weighted average fair value	$ 18.48	$ 13.88	$ 11.13	$ 35.03	$ 38.42

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Condensed Financial Information of Registrant - Statements of Cash Flows (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating Activities
Net cash provided by operating activities	$ 370.2	$ 306.8	$ 243.7
Investing Activities
Proceeds from sale-leasebacks	104.9	0	79.0
Portfolio proceeds and other	288.9	154.1	84.3
Purchases of leased-in assets	(1.3)	(61.1)	(5.3)
Net cash used in investing activities	(343.6)	(458.0)	(417.7)
Financing Activities
Repayments of debt (original maturities longer than 90 days)	(671.2)	(312.8)	(344.2)
Net increase (decrease) in debt with original maturities of 90 days or less	243.3	(85.0)	46.8
Proceeds from issuances of debt (original maturities longer than 90 days)	445.2	790.3	573.8
Dividends	(58.8)	(56.0)	(53.5)
Net cash (used in) provided by financing activities	(39.9)	323.2	211.0
Net (decrease) increase in cash and cash equivalents during the period	(14.2)	169.9	36.8
Cash and Cash Equivalents at beginning of period	248.4	78.5	41.7
Cash and Cash Equivalents at end of period	234.2	248.4	78.5
Parent Company [Member]
Operating Activities
Net cash provided by operating activities	269.6	95.0	92.8
Investing Activities
Capital additions	(444.6)	(343.1)	(417.1)
Proceeds from sale-leasebacks	104.9	0	79.0
Portfolio proceeds and other	136.6	143.0	65.4
Purchases of leased-in assets	(1.4)	(61.1)	(5.3)
Capital contributions to affiliates, net	0	(25.7)	0
Net cash used in investing activities	(204.5)	(286.9)	(278.0)
Financing Activities
Repayments of debt (original maturities longer than 90 days)	(603.7)	(195.9)	(286.3)
Net increase (decrease) in debt with original maturities of 90 days or less	185.0	(89.1)	58.6
Proceeds from issuances of debt (original maturities longer than 90 days)	381.4	701.0	493.5
Dividends	(57.7)	(56.0)	(53.5)
Other	5.0	(8.6)	(6.3)
Net cash (used in) provided by financing activities	(90.0)	351.4	206.0
Net (decrease) increase in cash and cash equivalents during the period	(24.9)	159.5	20.8
Cash and Cash Equivalents at beginning of period	208.4	48.9	28.1
Cash and Cash Equivalents at end of period	183.5	208.4	48.9
Total Distributions from Affiliates	$ 101.0	$ 0	$ 57.3

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Other Assets and Other Liabilities

12 Months Ended

Dec. 31, 2012

Other Assets and Other Liabilities [Abstract]

Other Assets and Other Liabilities

Other Assets and Other Liabilities

The following table summarizes the components of Other Assets reported on the consolidated balance sheets as of December 31 (in millions):

	2012		2011
Inventory	$	49.1	$	42.1
Office furniture, fixtures and other equipment, net of accumulated depreciation	35.8		32.7
Derivatives	10.2		17.4
Deferred financing costs	14.8		16.1
Assets held for sale	10.1		0.5
Other investments	6.5		6.4
Prepaid items	9.5		12.5
Other	50.7		52.4
	$	186.7	$	180.1

The following table summarizes the components of Other Liabilities reported on the consolidated balance sheets as of December 31 (in millions):

	2012		2011
Accrued operating lease expense	$	56.3	$	67.3
Pension and other post-retirement liabilities	112.8		92.3
Deferred gains on sale-leasebacks	47.2		34.9
Unrecognized tax benefits	3.2		18.8
Environmental reserves	15.6		16.7
Deferred income	11.8		15.4
Derivatives	3.4		2.4
Other	32.6		33.8
	$	282.9	$	281.6

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Investments in Affiliated Companies (Balance Sheet, Affiliates) (Details 6) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Summarized balance sheet for all affiliated companies
Current assets	$ 311.0	$ 404.4
Noncurrent assets	4,781.3	4,724.4
Total assets	5,092.3	5,128.8
Current liabilities	439.7	570.7
Noncurrent liabilities	3,739.6	3,671.9
Shareholders’ equity	913.0	886.2
Total liabilities and shareholders' equity	$ 5,092.3	$ 5,128.8

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Earnings Per Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2011		Sep. 30, 2011		Jun. 30, 2011		Mar. 31, 2011		Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Numerator:
Net income	$ 29.7		$ 53.8	[1]	$ 23.5	[2]	$ 30.3	[3]	$ 31.6		$ 32.9		$ 26.4		$ 19.9	[3]	$ 137.3		$ 110.8		$ 80.8
Numerator for basic earnings per share — income available to common shareholders																	137.3		110.8		80.8
Effect of dilutive securities:
After-tax interest expense on convertible securities																	0		0		0.2
Numerator for diluted earnings per share — income available to common shareholders																	$ 137.3		$ 110.8		$ 81.0
Denominator:
Denominator for basic earnings per share — weighted average shares																	46.8		46.4		46.1
Effect of dilutive securities:
Equity compensation plans																	0.7		0.7		0.5
Convertible preferred stock																	0.1		0.1		0.1
Convertible securities																	0		0		0.3
Denominator for diluted earnings per share — adjusted weighted average and assumed conversion																	47.6		47.2		47.0
Basic earnings per share (in dollars per share)	$ 0.63	[4]	$ 1.15	[4]	$ 0.50	[4]	$ 0.65	[3],[4]	$ 0.68	[4]	$ 0.71	[4]	$ 0.57	[4]	$ 0.43	[3],[4]	$ 2.93	[4]	$ 2.39	[4]	$ 1.75
Diluted earnings per share (in dollars per share)	$ 0.62	[4]	$ 1.13	[4]	$ 0.49	[4]	$ 0.64	[3],[4]	$ 0.67	[4]	$ 0.70	[4]	$ 0.56	[4]	$ 0.42	[3],[4]	$ 2.88	[4]	$ 2.35	[4]	$ 1.72

[1] The increase in income from the second quarter of 2012 was primarily due to the absence of the hedge loss at AAE and the recognition of $15.5 million of tax benefits.

[2] The decrease in income from the first quarter of 2012 was primarily due to a $12.1 million loss on the termination of a qualified hedge at GATX's AAE Cargo affiliate, partially offset by an increase in seasonal income at ASC.

[3] Total revenues and net income in the first quarter of each year are typically lower than the subsequent quarters due to seasonal inactivity at ASC.

[4] _

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Description of Business

12 Months Ended

Dec. 31, 2012

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Description of Business

Description of Business

Headquartered in Chicago, Illinois, GATX Corporation (“GATX” or the “Company”) leases, operates, manages and remarkets long-lived, widely-used assets, primarily in the rail and marine markets. GATX also invests in joint ventures that complement existing business activities. In 2012, the Company modified the composition of its reportable segments to reflect an increasing focus on international growth and related changes in its management structure. As a result, the Company now reports financial results through fourprimary business segments: Rail North America, Rail International, American Steamship Company (“ASC”) and Portfolio Management. All segment information is presented on this basis.

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Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
VIE for Rail	$ 6,855.2	$ 6,416.0
VIE depreciation allowance	2,200.8	2,056.7
VIE nonrecourse debt	130.6	149.4
Common stock, par value	$ 0.625	$ 0.625
Common stock, shares authorized	120,000,000	120,000,000
Common stock, shares issued	66,021,444	65,775,568
Common stock, shares outstanding	46,898,924	46,653,048
Treasury stock, shares outstanding	19,122,520	19,122,520
Preferred stock, aggregate liquidation preference	0.9	1.0
Series A and B $2.50 Cumulative Convertible Preferred Stock [Member]
Preferred stock, par value	$ 1	$ 1
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	15,567	16,644
Preferred stock, shares outstanding	15,567	16,644
Preferred stock, aggregate liquidation preference	0.9	1.0
Cumulative annual cash dividend per share on preferred stock	$ 2.50	$ 2.5
Variable Interest Entity, Primary Beneficiary [Member]
VIE for Rail	123.1	123.5
VIE depreciation allowance	24.7	19.2
VIE nonrecourse debt	$ 35.1	$ 45.2

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Share-Based Compensation

12 Months Ended

Dec. 31, 2012

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-Based Compensation

Share-Based Compensation

GATX provides equity awards to its employees under its GATX Corporation 2012 Incentive Award Plan (the “2012 Plan”), which was adopted in 2012 and superseded the GATX Corporation 2004 Equity Incentive Compensation Plan. The plan provides for the granting of stock options, stock appreciation rights (“SARs”), restricted shares and phantom stock awards. As of December 31, 2012, 3.5 million shares were authorized under the 2012 Plan and 3.5 million shares were available for future issuance. GATX recognizes compensation expense for its equity awards in selling, general and administrative expenses over the service period of each award. For 2012, 2011 and 2010, share-based compensation expense was $12.2 million, $11.0 million and $8.0 million, respectively, and related tax benefits were $4.6 million, $4.1 million and $3.0 million, respectively. These awards are more fully described below.

Stock Option and SAR Awards

Stock option and SARs provide for the purchase of shares of common stock and may be granted for periods not longer than seven years from the grant date. SARs entitle the holder to receive the difference between the market price of GATX’s common stock at the time of exercise and the exercise price, either in shares of common stock, cash or a combination thereof, at GATX’s discretion. Options entitle the holder to purchase shares of GATX common stock at a specified exercise price. Dividends accrue on all options and SARs and are paid upon vesting. Dividends continue to be paid until the options or SARs are exercised, cancelled or expire. The exercise price for stock options and SARs is equal to the average of the high and low trading prices of GATX common stock on the date of grant. Compensation expense is recognized on a straight-line basis over the applicable vesting period. Since 2006, only SARs have been awarded. SARs vest and become exercisable in 1/3 annual increments over three years.

The estimated fair value of a SAR is the sum of the value derived using the Black-Scholes option pricing model and the present value of dividends expected to be paid over the expected term of the SAR. The Black-Scholes valuation incorporates various assumptions, including expected term, expected volatility, and risk free interest rates. Expected term is based on historical exercise patterns and post-vesting terminations. Expected volatility is based on the historical volatility of GATX’s stock price over a period equal to the expected term. Risk-free interest rates are based on the implied yield on U.S. Treasury zero-coupon bond issues with a remaining term equal to the expected term.

The weighted average fair value for GATX’s SARs and the assumptions used to estimate fair value were:

	2012			2011			2010
Weighted average estimated fair value	$	18.48		$	13.88		$	11.13
Quarterly dividend rate	$	0.29		$	0.29		$	0.28
Expected term of SAR, in years	4.7			4.3			4.3
Risk-free interest rate	1.0		%	1.6		%	2.0		%
Dividend yield	2.7		%	3.4		%	4.3		%
Expected stock price volatility	43.3		%	41.9		%	41.8		%
Present value of dividends	$	5.37		$	4.76		$	4.55

Certain data with respect to stock option and SAR activity for the year ended December 31, 2012, were:

	Number of Options and SARs (in thousands)	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value (in millions)
Outstanding at beginning of the year	1,879	$	31.08
Granted	350	43.99
Exercised	(341)	28.99			$	4.9
Forfeited/Cancelled	(10)	37.15
Expired	(6)	38.95
Outstanding at end of the year	1,872	33.82		3.7	18.0
Vested and exercisable at end of the year	1,146	31.48		2.6	13.8

The total intrinsic value of options and SARs exercised during the years ended December 31, 2012, 2011 and 2010 was $4.9 million, $4.5 million and $1.0 million, respectively. As of December 31, 2012, there was $6.3 million of unrecognized compensation expense related to nonvested SARs, which is expected to be recognized over a weighted average period of 1.7 years.

Restricted and Performance Share Awards

Restricted shares entitle the recipient to receive a specified number of restricted shares of common stock upon vesting. Restricted shares do not carry voting rights and are not transferable prior to the expiration of a specified restriction period, generally three years, as determined by the Compensation Committee of the Board of Directors ( the “Compensation Committee”). Dividends accrue on all restricted shares and are paid upon vesting. Compensation expense is recognized for these awards over the applicable vesting period.

Performance shares are restricted shares that are granted to key employees based on the achievement of certain strategic objectives. The shares are converted to common stock based on the achievement of predetermined performance goals at the end of a specified performance period as determined by the Compensation Committee. An estimate of the number of shares expected to vest as a result of actual performance against the performance criteria is made at the time of grant to determine total compensation expense to be recognized. The estimate is reevaluated annually and total compensation expense is adjusted for any changes in the estimate, with a cumulative catch up adjustment (i.e., the cumulative effect of applying the change in estimate retrospectively) recognized in the period of change. Compensation expense is recognized for these awards over the applicable vesting period, generally three years.

GATX values its restricted and performance share awards based on the average of the high and low values of its stock on the grant date. As of December 31, 2012, there was $6.6 million of unrecognized compensation expense related to these awards, which is expected to be recognized over a weighted average period of 1.8 years.

Certain data with respect to restricted and performance share activity for the year ended December 31, 2012, were:

	Number of Share Units Outstanding		Weighted Average Grant-Date Fair Value
Restricted Shares:
Nonvested at beginning of the year	333,837		$	29.04
Granted	75,580		43.71
Vested	(134,508	)	25.10
Forfeited	(7,919	)	33.87
Nonvested at end of the year	266,990		35.03
Performance Shares:
Nonvested at beginning of the year	188,434		$	30.36
Granted	76,780		44.02
Net increase due to estimated performance	9,567		40.81
Vested	(85,575	)	25.96
Nonvested at end of the year	189,206		38.42

The total fair value of restricted and performance shares that vested during the years ended December 31, 2012, 2011 and 2010, was $5.6 million, $2.7 million and $2.5 million, respectively.

Phantom Stock Awards

Phantom stock is granted to non-employee directors as a component of their compensation for service on GATX’s Board of Directors. In accordance with the terms of the phantom stock awards, each director is credited with a quantity of units that equate to, but are not, common shares in the Company. Phantom stock awards are dividend participating with all dividends reinvested in additional phantom shares at the average of the high and low trading prices of GATX stock on the dividend payment date. Settlement of whole units of phantom stock will be made in shares of common stock and fractional units will be paid in cash at the expiration of each director’s service on the Board and/or in accordance with his or her deferral election. In 2012, GATX granted 20,722 units of phantom stock and 135,261 units were outstanding as of December 31, 2012.

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Income Taxes (Details 3) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Summary of reasons for difference between GATX's effective income tax rate and federal statutory income tax
Income taxes at federal statutory rate	$ 50.4	$ 37.7	$ 20.8
Adjust for effect of:
Foreign tax credits	(13.7)	(0.1)	0
Foreign earnings taxed at lower rates	(4.1)	(6.7)	(2.7)
Tax effect of foreign dividends	6.3	0	0
Expiration of the applicable statute of limitations	(15.5)		0
Settlement of audit issues	0	4.8	(9.5)
Corporate owned life insurance	(0.3)	(0.2)	(2.4)
State income taxes	1.9	1.1	0.1
Other	1.1	2.2	0.7
Income taxes	$ 26.1	$ 29.2	$ 7.0
Effective income tax rate	18.20%	27.10%	11.80%

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Pension and Other Post-Retirement Benefits (Details 10) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Multiemployer Plans
Contributions	$ 8.1		$ 8.5		$ 8.4
American Maritime Officers Pension Plan [Member]
Multiemployer Plans
Zone Status	Yellow	[1]
Contributions	1.5	[2]	2.1	[2]	2.2	[2]
Collective Bargaining	Jan. 15, 2017	[1]
Other Multiemployer Post Retirement Plans [Member]
Multiemployer Plans
Contributions	$ 6.6		$ 6.4		$ 6.2

[1] The American Maritime Officers Pension Plan was determined to be in endangered status (i.e. “yellow zone” as defined by the Pension Protection Act of 2006) for the plan year beginning October 1, 2012, because it has funding or liquidity problems, or both. A rehabilitation plan, as defined by the Employee Retirement Security Act of 1974, was instituted under which certain adjustable benefits were reduced or eliminated and GATX is required to contribute at a negotiated rate per day worked by each employee.

[2] GATX's contributions represented more than 5% of the total contributions to the plan during each year and no surcharge was imposed for any year.

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Pension and Other Post-Retirement Benefits (Details 8) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Fair value of pension plan assets
Assets	$ 409.1	$ 377.5
Fair Value, Inputs, Level 1 [Member]
Fair value of pension plan assets
Assets	11.3	11.8
Fair Value, Inputs, Level 2 [Member]
Fair value of pension plan assets
Assets	397.8	365.7
Fair Value, Inputs, Level 3 [Member]
Fair value of pension plan assets
Assets	0	0
Short-term investment funds [Member]
Fair value of pension plan assets
Assets	1.0	2.9
Short-term investment funds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of pension plan assets
Assets	1.0	2.9
Short-term investment funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of pension plan assets
Assets	0	0
Short-term investment funds [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value of pension plan assets
Assets	0	0
Common stock [Member]
Fair value of pension plan assets
Assets	10.3	8.9
Common stock [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of pension plan assets
Assets	10.3	8.9
Common stock [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of pension plan assets
Assets	0	0
Common stock [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value of pension plan assets
Assets	0	0
Common stock collective funds [Member]
Fair value of pension plan assets
Assets	245.0	222.5
Common stock collective funds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of pension plan assets
Assets	0	0
Common stock collective funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of pension plan assets
Assets	245.0	222.5
Common stock collective funds [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value of pension plan assets
Assets	0	0
Fixed income collective trust funds [Member]
Fair value of pension plan assets
Assets	131.2	125.3
Fixed income collective trust funds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of pension plan assets
Assets	0	0
Fixed income collective trust funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of pension plan assets
Assets	131.2	125.3
Fixed income collective trust funds [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value of pension plan assets
Assets	0	0
Real estate investment funds [Member]
Fair value of pension plan assets
Assets	21.6	17.9
Real estate investment funds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of pension plan assets
Assets	0	0
Real estate investment funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of pension plan assets
Assets	21.6	17.9
Real estate investment funds [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value of pension plan assets
Assets	$ 0	$ 0

XML

Condensed Financial Information of Registrant - Statements of Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended												12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011		Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Condensed Financial Statements, Captions [Line Items]
Lease revenue													$ 917.0	$ 900.1	$ 860.4
Other revenue													60.7	61.3	55.2
Total Revenues	331.7	331.9		323.1		256.5		330.0	315.2	296.8	249.4		1,243.2	1,191.4	1,114.0
Maintenance expense													269.7	277.6	268.2
Depreciation													237.4	226.5	217.0
Operating lease expense													130.2	132.0	140.2
Other operating expense													24.2	27.8	30.9
Selling, general and administrative													160.2	155.3	134.8
Total Expenses													1,004.1	984.8	929.1
Net gain on asset dispositions													79.5	65.8	41.1
Interest expense, net													(166.6)	(168.9)	(167.1)
Other (expense) income													(8.2)	4.1	0.4
Income before Income Taxes and Share of Affiliates’ Earnings													143.8	107.6	59.3
Income tax benefit													(26.1)	(29.2)	(7.0)
Share of affiliates' earnings (net of tax)													19.6	32.4	28.5
Net Income	29.7	53.8	[1]	23.5	[2]	30.3	[3]	31.6	32.9	26.4	19.9	[3]	137.3	110.8	80.8
Foreign currency translation adjustments													25.0	(39.6)	(28.4)
Unrealized gain (loss) on securities													0.2	(0.2)	1.3
Unrealized gain (loss) on derivative instruments													11.7	(0.5)	(3.5)
Post-retirement benefit plans													(12.4)	(18.8)	5.1
Other comprehensive income (loss)													24.5	(59.1)	(25.5)
Comprehensive Income													161.8	51.7	55.3
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Lease revenue													504.5	477.7	458.9
Other revenue													43.5	44.4	41.0
Total Revenues													548.0	522.1	499.9
Maintenance expense													154.8	163.9	168.7
Depreciation													122.2	117.0	110.2
Operating lease expense													91.6	95.2	101.3
Other operating expense													12.0	11.5	20.2
Selling, general and administrative													118.4	113.3	97.2
Total Expenses													499.0	500.9	497.6
Net gain on asset dispositions													59.4	44.0	27.0
Interest expense, net													(65.4)	(72.8)	(74.0)
Other (expense) income													(4.4)	(2.4)	3.7
Income before Income Taxes and Share of Affiliates’ Earnings													38.6	(10.0)	(41.0)
Income tax benefit													1.0	4.8	20.8
Share of affiliates' earnings (net of tax)													97.7	116.0	101.0
Net Income													137.3	110.8	80.8
Foreign currency translation adjustments													25.0	(39.6)	(28.4)
Unrealized gain (loss) on securities													0.2	(0.2)	1.3
Unrealized gain (loss) on derivative instruments													11.7	(0.5)	(3.5)
Post-retirement benefit plans													(12.4)	(18.8)	5.1
Other comprehensive income (loss)													24.5	(59.1)	(25.5)
Comprehensive Income													$ 161.8	$ 51.7	$ 55.3

[1] The increase in income from the second quarter of 2012 was primarily due to the absence of the hedge loss at AAE and the recognition of $15.5 million of tax benefits.

[2] The decrease in income from the first quarter of 2012 was primarily due to a $12.1 million loss on the termination of a qualified hedge at GATX's AAE Cargo affiliate, partially offset by an increase in seasonal income at ASC.

[3] Total revenues and net income in the first quarter of each year are typically lower than the subsequent quarters due to seasonal inactivity at ASC.

XML

Financial Data of Business Segments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended												12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011		Dec. 31, 2012 Segment	Dec. 31, 2011	Dec. 31, 2010
Segment Reporting Information [Line Items]
Provision for Income Taxes, Equity Method Investment													$ 2.0	$ 8.2	$ 9.6
Number of business segments													4
Profitability
Lease revenue													917.0	900.1	860.4
Marine operating revenue													265.5	230.0	198.4
Other revenue													60.7	61.3	55.2
Total Revenues	331.7	331.9		323.1		256.5		330.0	315.2	296.8	249.4		1,243.2	1,191.4	1,114.0
Maintenance expense													269.7	277.6	268.2
Marine operating expense													182.4	165.6	138.0
Depreciation													237.4	226.5	217.0
Operating lease expense													130.2	132.0	140.2
Other operating expense													24.2	27.8	30.9
Total Expenses													843.9	829.5	794.3
Net gain on asset dispositions													79.5	65.8	41.1
Interest expense, net													(166.6)	(168.9)	(167.1)
Other (expense) income													(8.2)	4.1	0.4
Share of affiliates' earnings (pre-tax)													21.6	40.6	38.1
Segment profit (loss)													325.6	303.5	232.2
SG&A													160.2	155.3	134.8
Income tax benefit													26.1	29.2	7.0
Net Income	29.7	53.8	[1]	23.5	[2]	30.3	[3]	31.6	32.9	26.4	19.9	[3]	137.3	110.8	80.8
Selected Balance Sheet Data
Investments in affiliated companies	502.0							513.8					502.0	513.8	486.1
Identifiable assets	6,055.4							5,857.5					6,055.4	5,857.5	5,442.4
Capital Expenditures
Portfolio investments and capital additions													770.0	614.6	585.1
Rail North America [Member]
Segment Reporting Information [Line Items]
Leverage level expressed as a ratio of recourse debt to equity													5
Profitability
Lease revenue													713.9	690.9	671.5
Marine operating revenue													0	0	0
Other revenue													51.4	51.5	48.5
Total Revenues													765.3	742.4	720.0
Maintenance expense													201.4	206.1	205.5
Marine operating expense													0	0	0
Depreciation													167.7	162.5	158.6
Operating lease expense													126.5	130.9	139.1
Other operating expense													18.5	18.8	24.2
Total Expenses													514.1	518.3	527.4
Net gain on asset dispositions													58.6	52.1	29.6
Interest expense, net													(101.9)	(101.7)	(103.8)
Other (expense) income													(5.1)	(5.7)	(5.5)
Share of affiliates' earnings (pre-tax)													6.5	3.9	7.2
Segment profit (loss)													209.3	172.7	120.1
Selected Balance Sheet Data
Investments in affiliated companies	46.9							54.0					46.9	54.0	59.2
Identifiable assets	3,601.1							3,540.2					3,601.1	3,540.2	3,226.8
Capital Expenditures
Portfolio investments and capital additions													465.9	280.5	367.1
Rail International [Member]
Segment Reporting Information [Line Items]
Leverage level expressed as a ratio of recourse debt to equity													2
Profitability
Lease revenue													161.2	160.5	141.8
Marine operating revenue													0	0	0
Other revenue													6.5	7.8	5.7
Total Revenues													167.7	168.3	147.5
Maintenance expense													46.6	52.1	49.8
Marine operating expense													0	0	0
Depreciation													36.1	33.6	30.2
Operating lease expense													0	0	0
Other operating expense													5.1	4.2	5.1
Total Expenses													87.8	89.9	85.1
Net gain on asset dispositions													1.7	0	(0.6)
Interest expense, net													(24.5)	(25.4)	(23.3)
Other (expense) income													(6.1)	7.2	(2.0)
Share of affiliates' earnings (pre-tax)													(18.3)	0.5	(6.0)
Segment profit (loss)													32.7	60.7	30.5
Selected Balance Sheet Data
Investments in affiliated companies	77.2							88.2					77.2	88.2	81.8
Identifiable assets	1,105.8							903.2					1,105.8	903.2	1,065.6
Capital Expenditures
Portfolio investments and capital additions													200.1	140.8	107.5
ASC [Member]
Segment Reporting Information [Line Items]
Leverage level expressed as a ratio of recourse debt to equity													1.5
Profitability
Lease revenue													4.3	4.2	4.1
Marine operating revenue													239.1	212.2	185.3
Other revenue													0	0	0
Total Revenues													243.4	216.4	189.4
Maintenance expense													21.7	19.4	12.9
Marine operating expense													160.3	151.7	129.1
Depreciation													11.9	11.3	10.7
Operating lease expense													3.8	0	0
Other operating expense													(0.3)	0	0
Total Expenses													197.4	182.4	152.7
Net gain on asset dispositions													0	1.1	0
Interest expense, net													(7.1)	(7.7)	(8.3)
Other (expense) income													(1.4)	(0.1)	0.2
Share of affiliates' earnings (pre-tax)													0	0	0
Segment profit (loss)													37.5	27.3	28.6
Selected Balance Sheet Data
Investments in affiliated companies	0							0					0	0	0
Identifiable assets	284.2							276.1					284.2	276.1	271.3
Capital Expenditures
Portfolio investments and capital additions													12.6	17.4	9.0
Portfolio Management [Member]
Segment Reporting Information [Line Items]
Leverage level expressed as a ratio of recourse debt to equity													3
Profitability
Lease revenue													37.6	44.5	43.0
Marine operating revenue													26.4	17.8	13.1
Other revenue													2.8	2.0	1.0
Total Revenues													66.8	64.3	57.1
Maintenance expense													0	0	0
Marine operating expense													22.1	13.9	8.9
Depreciation													21.7	19.1	17.5
Operating lease expense													0.2	1.4	1.4
Other operating expense													0.9	4.3	1.3
Total Expenses													44.9	38.7	29.1
Net gain on asset dispositions													19.2	12.6	12.1
Interest expense, net													(27.7)	(29.6)	(28.2)
Other (expense) income													3.4	2.8	(0.1)
Share of affiliates' earnings (pre-tax)													33.4	36.2	36.9
Segment profit (loss)													50.2	47.6	48.7
Selected Balance Sheet Data
Investments in affiliated companies	377.9							371.6					377.9	371.6	345.1
Identifiable assets	797.4							844.0					797.4	844.0	741.0
Capital Expenditures
Portfolio investments and capital additions													83.5	172.0	97.4
Other [Member]
Profitability
Lease revenue													0	0	0
Marine operating revenue													0	0	0
Other revenue													0	0	0
Total Revenues													0	0	0
Maintenance expense													0	0	0
Marine operating expense													0	0	0
Depreciation													0	0	0
Operating lease expense													(0.3)	(0.3)	(0.3)
Other operating expense													0	0.5	0.3
Total Expenses													(0.3)	0.2	0
Net gain on asset dispositions													0	0	0
Interest expense, net													(5.4)	(4.5)	(3.5)
Other (expense) income													1.0	(0.1)	7.8
Share of affiliates' earnings (pre-tax)													0	0	0
Segment profit (loss)													(4.1)	(4.8)	4.3
Selected Balance Sheet Data
Investments in affiliated companies	0							0					0	0	0
Identifiable assets	266.9							294.0					266.9	294.0	137.7
Capital Expenditures
Portfolio investments and capital additions													7.9	3.9	4.1
Parent [Member]
Profitability
Income tax benefit													$ 28.1	$ 37.4	$ 16.6

[1] The increase in income from the second quarter of 2012 was primarily due to the absence of the hedge loss at AAE and the recognition of $15.5 million of tax benefits.

[2] The decrease in income from the first quarter of 2012 was primarily due to a $12.1 million loss on the termination of a qualified hedge at GATX's AAE Cargo affiliate, partially offset by an increase in seasonal income at ASC.

[3] Total revenues and net income in the first quarter of each year are typically lower than the subsequent quarters due to seasonal inactivity at ASC.

XML

Document and Entity Information (USD $) In Billions, except Share data in Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Jan. 31, 2013	Jun. 30, 2012
Document and Entity Information [Abstract]
Entity Registrant Name	GATX Corporation
Entity Central Index Key	0000040211
Document Type	10-K
Document Period End Date	Dec. 31, 2012
Amendment Flag	false
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 1.8
Entity Common Stock, Shares Outstanding		47.0

XML

Income Taxes

12 Months Ended

Dec. 31, 2012

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. U.S. income taxes have not been provided on the undistributed earnings of foreign subsidiaries and affiliates that GATX intends to permanently reinvest in foreign operations. The cumulative amount of such earnings was $551.4 million at December 31, 2012. The ultimate tax cost of these earnings is dependent on tax laws in effect and other circumstances at the time of distribution.

Significant components of GATX’s deferred tax liabilities and assets as of December 31 were (in millions):

	2012			2011
Deferred Tax Liabilities
Book/tax basis difference due to depreciation	$	806.7		$	756.2
Leveraged leases	—			62.7
Investments in affiliated companies	81.6			82.4
Lease accounting (other than leveraged)	12.6			13.7
Other	3.1			2.9
Total deferred tax liabilities	904.0			917.9
Deferred Tax Assets
Alternative minimum tax credit	5.2			8.9
Federal net operating loss	—			38.1
Foreign tax credit	7.3			13.9
Valuation on foreign tax credit	(7.3		)	(13.9		)
State net operating loss	26.6			31.1
Valuation on state net operating loss	(12.8		)	(15.8		)
Foreign net operating loss	9.5			7.3
Accruals not currently deductible for tax purposes	19.1			21.8
Allowance for losses	6.6			5.4
Pension and post-retirement benefits	48.6			40.7
Other	18.2			14.5
Total deferred tax assets	121.0			152.0
Net deferred tax liabilities	$	783.0		$	765.9

At December 31, 2012, GATX had fully utilized its U.S. federal tax net operating loss carryforward of $108.8 million, and its alternative minimum tax credit, which has an unlimited carryforward period, was reduced to $5.2 million.

At December 31, 2012, GATX had foreign tax credits of $7.3 million that are scheduled to expire beginning in 2015. A $7.3 million valuation allowance has been recorded as the Company believes it is more likely than not that it will be unable to utilize these credits. GATX also had state net operating losses of $26.6 million, net of federal benefit, that are scheduled to expire at various times beginning in 2013. A $12.8 million valuation allowance has been recorded as the Company believes it is more likely than not that it will be unable to utilize all of these losses. Additionally, GATX has a foreign net operating loss of $9.5 million that has an unlimited carryforward period. Utilization of future tax credits and net operating losses will be dependent on a number of variables, including the amount of taxable income, foreign source income attributes and state apportionment factors.

A reconciliation of the beginning and ending amount of gross liability for unrecognized tax benefits is as follows (in millions):

	2012			2011
Beginning balance	$	20.8		$	42.7
Reductions due to expiration of the applicable statute of limitations	(16.1		)	—
Reductions due to settlement of audit issues	—			(21.9		)
Ending balance	$	4.7		$	20.8

At December 31, 2012, GATX’s gross liability for unrecognized tax benefits was $4.7 million of which $3.2 million, if recognized, would favorably impact income tax expense. Subject to the completion of certain audits, the Company believes it is reasonably possible that, within the next 12 months, unrecognized tax benefits of $0.4 million may be recognized. During the year ended December 31, 2012, upon expiration of the applicable statute of limitations, GATX released a gross unrecognized tax benefit of $16.1 million (net tax expense impact of $15.5 million). During the year ended December 31, 2011, the Company settled several open audit years resulting in the release of gross unrecognized tax benefits totaling $21.9 million (net tax expense impact of $4.8 million). The Company recognizes interest and penalties related to unrecognized tax benefits as income tax expense. No amounts have been accrued for penalties. To the extent interest is not assessed or otherwise reduced with respect to uncertain tax positions, any required adjustment will be recorded as a reduction of income tax expense.

GATX files numerous consolidated and separate income tax returns in the U.S. federal jurisdiction, as well as various state and foreign jurisdictions. All federal examinations with respect to GATX’s U.S. tax returns for years prior to 2009 have been closed. The Company and its subsidiaries are undergoing audits in various state and foreign jurisdictions.

The components of income before income taxes, excluding domestic and foreign joint ventures, for the years ending December 31 consisted of (in millions):

	2012		2011		2010
Domestic	$	80.5	$	39.5	$	5.1
Foreign	63.3		68.1		54.2
	$	143.8	$	107.6	$	59.3

GATX and its U.S. subsidiaries file a consolidated federal income tax return. Income taxes, excluding domestic and foreign joint ventures, for the years ending December 31 consisted of (in millions):

	2012			2011		2010
Current
Domestic:
Federal	$	(8.8	)	$	0.7	$	(0.2	)
State and local	2.5			0.8		0.8
	(6.3		)	1.5		0.6
Foreign	8.0			5.0		5.0
	1.7			6.5		5.6
Deferred
Domestic:
Federal	16.0			8.9		(3.1		)
State and local	(3.1		)	0.5		0.3
	12.9			9.4		(2.8		)
Foreign	11.5			13.3		4.2
	24.4			22.7		1.4
Income taxes	$	26.1		$	29.2	$	7.0

The reasons for the difference between GATX’s effective income tax rate and the federal statutory income tax rate for the years ending December 31 were (in millions):

	2012			2011			2010
Income taxes at federal statutory rate	$	50.4		$	37.7		$	20.8
Adjust for effect of:
Foreign tax credits	(13.7		)	(0.1		)	—
Foreign earnings taxed at lower rates	(4.1		)	(6.7		)	(2.7		)
Tax effect of foreign dividends	6.3			—			—
Expiration of the applicable statute of limitations	(15.5		)	—			—
Settlement of audit issues	—			(4.8		)	(9.5		)
Corporate owned life insurance	(0.3		)	(0.2		)	(2.4		)
State income taxes	1.9			1.1			0.1
Other	1.1			2.2			0.7
Income taxes	$	26.1		$	29.2		$	7.0
Effective income tax rate	18.2		%	27.1		%	11.8		%

The 2012 effective income tax rate was impacted by the utilization of foreign tax credits offset by incremental income and withholding taxes on foreign dividends. Additionally, 2012 included a $15.5 million benefit that was recognized upon the expiration of the applicable statute of limitations. In each of 2011 and 2010, the effective income tax rate was impacted by the resolution of various foreign, federal, and state tax audit issues. The adjustment for foreign earnings reflects the impact of lower tax rates on income earned at GATX's foreign subsidiaries.

State income taxes are provided on domestic pre-tax income or loss. The effect of state income tax on the overall income tax rate is impacted by the amount of domestic income subject to state taxes relative to total worldwide income.

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Fair Value Disclosure (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Interest Expense [Member] | Fair Value Hedging [Member]
Impact of GATX's Derivative Instrument on Income Statement and Other comprehensive income (loss)
Interest expense	$ 5.0	[1]	$ 2.3	[1]	$ (7.4)	[1]
Interest Expense [Member] | Cash Flow Hedges [Member]
Impact of GATX's Derivative Instrument on Income Statement and Other comprehensive income (loss)
Effective portion reclassified from accumulated other comprehensive loss	4.2		2.5		7.7
Other Comprehensive Income (Loss) [Member] | Cash Flow Hedges [Member]
Impact of GATX's Derivative Instrument on Income Statement and Other comprehensive income (loss)
Other comprehensive loss (effective portion)	(0.2)		(5.9)		(8.1)
Operating Lease Expense [Member] | Cash Flow Hedges [Member]
Impact of GATX's Derivative Instrument on Income Statement and Other comprehensive income (loss)
Effective portion reclassified from accumulated other comprehensive loss	1.4		1.5		1.5
Other Expense [Member] | Cash Flow Hedges [Member]
Impact of GATX's Derivative Instrument on Income Statement and Other comprehensive income (loss)
Other expense	(0.1)		0		(0.1)
Other Expense [Member] | Non-designated [Member]
Impact of GATX's Derivative Instrument on Income Statement and Other comprehensive income (loss)
Other expense	$ (5.0)		$ 1.8		$ 0.4

[1] Equally offsetting the amount recognized in interest expense was the fair value adjustment relating to the underlying debt.

XML

Pension and Other Post-Retirement Benefits (Details 7) (Foreign Pension Plans, Defined Benefit [Member])	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Weighted-average asset allocations of its foreign funded pension plan
Target asset allocation percentage	100.00%
Actual plan asset allocations	100.00%	100.00%
Equity Securities [Member]
Weighted-average asset allocations of its foreign funded pension plan
Target asset allocation percentage	36.80%
Actual plan asset allocations	36.20%	36.10%
Debt Securities [Member]
Weighted-average asset allocations of its foreign funded pension plan
Target asset allocation percentage	63.20%
Actual plan asset allocations	63.80%	63.90%

XML

Consolidated Statements of Comprehensive Income (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Revenues
Lease revenue	$ 917.0		$ 900.1		$ 860.4
Marine operating revenue	265.5		230.0		198.4
Other revenue	60.7		61.3		55.2
Total Revenues	1,243.2		1,191.4		1,114.0
Expenses
Maintenance expense	269.7		277.6		268.2
Marine operating expense	182.4		165.6		138.0
Depreciation	237.4		226.5		217.0
Operating lease expense	130.2		132.0		140.2
Other operating expense	24.2		27.8		30.9
Selling, general and administrative	160.2		155.3		134.8
Total Expenses	1,004.1		984.8		929.1
Other Income (Expense)
Net gain on asset dispositions	79.5		65.8		41.1
Interest expense, net	(166.6)		(168.9)		(167.1)
Other (expense) income	(8.2)		4.1		0.4
Income before Income Taxes and Share of Affiliates’ Earnings	143.8		107.6		59.3
Income Taxes	(26.1)		(29.2)		(7.0)
Share of Affiliates’ Earnings (net of tax)	19.6		32.4		28.5
Net Income	137.3		110.8		80.8
Other Comprehensive Income, net of taxes
Foreign currency translation adjustments	25.0		(39.6)		(28.4)
Unrealized gain (loss) on securities	0.2		(0.2)		1.3
Unrealized gain (loss) on derivative instruments	11.7		(0.5)		(3.5)
Post-retirement benefit plans	(12.4)		(18.8)		5.1
Other comprehensive income (loss)	24.5		(59.1)		(25.5)
Comprehensive Income	$ 161.8		$ 51.7		$ 55.3
Share Data
Basic earnings per share (in dollars per share)	$ 2.93	[1]	$ 2.39	[1]	$ 1.75
Average number of common shares (in shares)	46.8		46.4		46.1
Diluted earnings per share (in dollars per share)	$ 2.88	[1]	$ 2.35	[1]	$ 1.72
Average number of common shares and common share equivalents (in shares)	47.6		47.2		47.0
Dividends declared per common share (in dollars per share)	$ 1.2		$ 1.16		$ 1.12

[1] _

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Investments in Affiliated Companies

12 Months Ended

Dec. 31, 2012

Equity Method Investments and Joint Ventures [Abstract]

Investments in Affiliated Companies

Investments in Affiliated Companies

Investments in affiliated companies represent investments in and loans to domestic and foreign affiliates that are in businesses similar to those of GATX, primarily companies offering lease financing and related services for customers operating rail and marine assets, as well as companies that lease aircraft engines. As of December 31, 2012 and 2011, loan amounts included were $51.3 million and $57.7 million, respectively.

In 2012, GATX's gas compression equipment leasing affiliate, Enerven Compression, LLC ("Enerven"), sold substantially all of its assets and is in the process of liquidation. In connection with the disposition, GATX recognized an impairment loss of $14.8 million, which is reflected in share of affiliates' earnings. In 2011, the Clipper Fourth Limited and Clipper Fourth APS marine affiliates, in each of which GATX held a 45% interest, were dissolved. In connection with the dissolutions, GATX contributed $62.1 million, representing its share of the Clipper affiliates' outstanding debt, received liquidating distributions of six vessels with an aggregate fair value of $88.8 million and recognized an impairment loss of $5.2 million, which is reflected in share of affiliates’ earnings.

The following table presents GATX's most significant investments in affiliated companies and related percentage of ownership, by segment, as of December 31, 2012 (in millions):

	Segment	GATX’s Investment		GATX’s Percentage Ownership
Rolls-Royce & Partners Finance *	Portfolio Management	$	208.7	50.0	%
AAE Cargo AG	Rail International	74.7		37.5	%
Cardinal Marine Investments, LLC	Portfolio Management	52.6		50.0	%
Singco Gas Pte, Limited	Portfolio Management	40.5		50.0	%
Enerven Compression, LLC	Portfolio Management	32.9		45.6	%
Adler Funding, LLC	Rail North America	26.7		12.5	%
Southern Capital Corporation	Rail North America	20.2		50.0	%
Intermodal Investment Fund V	Portfolio Management	18.1		50.0	%
Somargas II Private Limited	Portfolio Management	15.4		35.0	%
Other affiliates		12.2		various
Investments in Affiliated Companies		$	502.0

__________

(*) Combined investment balances of fourteen separate joint ventures (collectively, the "RRPF Affiliates")

The following table shows GATX’s share of affiliates’ earnings by segment for the years ending December 31 (in millions):

	2012			2011			2010
Rail North America	$	6.5		$	3.9		$	7.2
Rail International	(18.3		)	0.5			(6.0		)
Portfolio Management	33.4			36.2			36.9
Share of affiliates' earnings (pre-tax)	21.6			40.6			38.1
Income taxes	(2.0		)	(8.2		)	(9.6		)
Share of Affiliates' Earnings	$	19.6		$	32.4		$	28.5

The following table summarizes GATX's cash investments in and distributions from affiliates for the years ended December 31 (in millions):

	Cash Investments						Cash Distributions
	2012		2011		2010		2012		2011		2010
Rail North America	$	—	$	—	$	36.8	$	14.9	$	8.0	$	9.7
Rail International	—		2.8		—		—		—		—
Portfolio Management	29.7		113.4		27.9		50.8		27.3		45.0
	$	29.7	$	116.2	$	64.7	$	65.7	$	35.3	$	54.7

The following guarantees, as described in Note 14, related to GATX's affiliated companies were outstanding as of December 31 (in millions). The amount shown below excludes an affiliate guarantee for which no stated maximum potential future payment is provided and for which the likelihood of performance under the guarantee is considered remote.

	2012		2011
Loan payment guarantees	$	42.0	$	42.0

Summarized Financial Data of Affiliates

Aggregated operating results for all of GATX's affiliated companies for the years ending December 31 were (in millions):

	2012		2011		2010
Revenues	$	651.8	$	645.5	$	636.2
Gains on sales of assets	57.4		21.1		10.9
Net income	75.3		88.5		55.8

Aggregated summarized balance sheet data for all of GATX's affiliated companies as of December 31 were (in millions):

	2012		2011
Current assets	$	311.0	$	404.4
Noncurrent assets	4,781.3		4,724.4
Total assets	$	5,092.3	$	5,128.8
Current liabilities	$	439.7	$	570.7
Noncurrent liabilities	3,739.6		3,671.9
Shareholders’ equity	913.0		886.2
Total liabilities and shareholders' equity	$	5,092.3	$	5,128.8

Summarized Financial Data for the RRPF Affiliates

As noted above, GATX's affiliate investments include a 50% interest in each of the RRPF Affiliates, a collection of fourteen domestic and foreign joint ventures with Rolls-Royce plc (or affiliates thereof, collectively “Rolls-Royce”), a leading manufacturer of commercial aircraft jet engines. The RRPF Affiliates are primarily engaged in two business activities: lease financing of aircraft engines to a diverse group of commercial aircraft operators worldwide and sale-leaseback financing of aircraft engines to Rolls-Royce for use in their engine maintenance programs. These aircraft engines are generally depreciated over a useful life of 25 years to an estimated residual value. Lease terms vary but typically range from 7 to 10 years. Rolls-Royce acts as manager for each of the RRPF Affiliates and also performs substantially all required maintenance activities. GATX's share of affiliates' earnings (after-tax) from the RRPF Affiliates was $36.7 million, $30.8 million and $25.4 million in 2012, 2011 and 2010, respectively.

The following financial information was derived from the combined financial statements of the RRPF Affiliates.

Condensed income statements for the years ending December 31 (in millions):

	2012			2011			2010
Lease revenue from third parties	$	140.4		$	127.9		$	118.2
Lease revenue from Rolls-Royce	112.9			96.3			94.8
Depreciation expense	(115.1		)	(100.1		)	(89.1		)
Interest expense	(64.8		)	(55.5		)	(54.5		)
Other expenses	(16.3		)	(11.5		)	(9.1		)
Gains on sales of assets	35.9			19.4			3.4
Income before income taxes	93.0			76.5			63.7
Income taxes *	(3.8		)	(3.6		)	(11.6		)
Net income	$	89.2		$	72.9		$	52.1

_________

(*) Represents income taxes directly attributable to the RRPF Affiliates.  Several of the RRPF Affiliates are flow through entities and income taxes are incurred at the shareholder level.

Condensed balance sheets as of December 31 (in millions):

	2012		2011
Current assets	$	84.8	$	104.5
Operating assets, net of accumulated depreciation of $651.8 for 2012 and $568.1 for 2011 *	2,572.2		2,335.5
Other noncurrent assets	14.1		15.0
Total assets	$	2,671.1	$	2,455.0
Current liabilities	$	122.8	$	141.6
Long-term debt	1,955.1		1,796.6
Other liabilities	217.7		201.1
Shareholders’ equity	375.5		315.7
Total liabilities and shareholders' equity	$	2,671.1	$	2,455.0

_________

(*) All operating assets were pledged as collateral for long term debt obligations.

Contractual future lease receipts from noncancelable leases as of December 31, 2012 were as follows (in millions):

	Rolls-Royce		Third Parties		Total
2013	$	120.9	$	133.1	$	254.0
2014	118.9		114.6		233.5
2015	119.7		99.7		219.4
2016	111.3		88.6		199.9
2017	89.4		80.0		169.4
Years thereafter	275.0		182.1		457.1
	$	835.2	$	698.1	$	1,533.3

Maturities of debt obligations as of December 31, 2012, were as follows (in millions):

	Debt Principal
2013	$	64.2
2014	417.1
2015	622.0
2016	359.7
2017	245.6
Years thereafter	288.3
Total debt principal *	$	1,996.9

_________

(*) All debt obligations are nonrecourse to the shareholders.

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Leases

12 Months Ended

Dec. 31, 2012

Leases [Abstract]

Leases

Leases

The following information pertains to GATX as a lessor:

The components of GATX’s finance leases as of December 31 were (in millions):

	Leveraged Leases					Direct Financing						Total Finance Leases
	2012		2011			2012			2011			2012			2011
Total contractual lease payments receivable	$	—	$	617.0		$	327.3		$	341.4		$	327.3		$	958.4
Principal and interest on third-party nonrecourse debt			(518.6		)	—			—			—			(518.6		)
Net contractual future lease receivable	—		98.4			327.3			341.4			327.3			439.8
Estimated non-guaranteed residual value of leased assets	—		20.9			86.9			93.7			86.9			114.6
Unearned income	—		(31.8		)	(168.5		)	(187.7		)	(168.5		)	(219.5		)
Finance leases	—		87.5			245.7			247.4			245.7			334.9
Allowance for losses	—		(9.0		)	—			—			—			(9.0		)
Deferred taxes	—		(62.7		)	—			—			—			(62.7		)
Net investment in finance leases	$	—	$	15.8		$	245.7		$	247.4		$	245.7		$	263.2

Leveraged Lease Income — Income from leveraged leases (net of taxes) was $0.2 million, $4.6 million and $1.5 million in 2012, 2011 and 2010, respectively.

Usage Rents —Rental income on certain operating leases is based on equipment usage. Rental income from usage rents was $18.2 million, $13.7 million and $11.8 million, in 2012, 2011 and 2010, respectively.

Initial Direct Costs — Deferred initial direct costs related to direct financing leases were $0.8 million and $0.9 million, at December 31, 2012 and 2011, respectively.

Future Receipts — Future contractual receipts from finance leases and noncancelable operating leases as of December 31, 2012, were (in millions):

	Finance Leases		Operating Leases *		Total
2013	$	40.2	$	784.4	$	824.6
2014	38.7		594.2		632.9
2015	35.9		465.8		501.7
2016	31.3		346.1		377.4
2017	29.4		223.0		252.4
Years thereafter	151.8		461.7		613.5
	$	327.3	$	2,875.2	$	3,202.5

__________

(*) The future contractual receipts due under operating leases include executory costs in the case of GATX's full service leases.

The following information pertains to GATX as a lessee:

Capital Lease Assets — Assets that are financed with capital lease obligations as of December 31 were (in millions):

	2012			2011
Railcars	$	—		$	3.6
Marine vessels	79.9			79.0
	79.9			82.6
Less: allowance for depreciation	(67.9		)	(67.7		)
	$	12.0		$	14.9

Lease Obligations — Certain leases provide options for GATX to renew the leases or purchase the assets at the end of the lease term. The specific terms of the renewal and purchase options vary. These amounts are not included with future contractual rental payments. Future contractual rental payments due under noncancelable leases as of December 31, 2012, were (in millions):

	Capital Leases			Recourse Operating Leases (a)		Nonrecourse Operating Leases (b)
2013	$	3.1		$	115.3	$	27.9
2014	3.1			119.7		27.4
2015	3.1			139.7		26.0
2016	2.7			101.5		21.9
2017	1.1			89.3		22.5
Years thereafter	—			417.4		75.3
	$	13.1		$	982.9	$	201.0
Less: amounts representing interest	(1.8		)
Present value of future contractual capital lease payments	$	11.3

__________

(a) The contractual rental payments do not include the costs of licenses, taxes, insurance, and maintenance, for which GATX is required to pay.

(b) The amounts shown for nonrecourse operating leases primarily reflect the rental payments of two wholly-owned bankruptcy-remote, SPCs. These rentals are consolidated for accounting purposes, but do not represent legal obligations of GATX.

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Allowance for Losses

12 Months Ended

Dec. 31, 2012

Receivables [Abstract]

Allowance for Losses

Allowance for Losses

The following summarizes changes in the allowance for losses at December 31 (in millions):

	2012			2011
Beginning balance	$	11.8		$	11.6
(Reversal) provision for losses	(0.6		)	0.2
Charges to allowance	(7.8		)	(0.5		)
Recoveries and other, including foreign exchange adjustments	1.2			0.5
Ending balance	$	4.6		$	11.8

The allowance for losses is comprised of general allowances for trade receivables and specific allowances for finance leases. As of December 31, 2012, general allowances for trade receivables were $3.4 million or 3.9% of rent and other receivables compared to $2.8 million or 3.7% at December 31, 2011. Specific allowances for finance leases were $1.2 million at December 31, 2012, compared to $9.0 million at December 31, 2011. The decrease in specific allowances was primarily related to the sale of a non-performing leveraged lease investment.

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Concentrations

12 Months Ended

Dec. 31, 2012

Risks and Uncertainties [Abstract]

Concentrations

Concentrations

Concentration of Revenues — GATX’s revenues are derived from a wide range of industries and companies. Approximately 23% of total revenues are generated from customers in the chemical industry, 20% from the petroleum industry, 15% from transportation industry, 12% from the steel industry and 11% from the food/agriculture industries. GATX’s foreign identifiable revenues were primarily generated in the countries of Canada, Germany, Poland, Mexico and Austria.

Concentration of Credit Risk — The Company does not have any revenue concentrations from any particular customer for any of the years ended December 31, 2012, 2011 and 2010. Under its lease agreements with lessees, GATX typically retains legal ownership of the asset except where such assets have been financed by sale-leasebacks. GATX performs a credit evaluation prior to approval of a lease contract. Subsequently, the creditworthiness of the customer and the value of the collateral are monitored on an ongoing basis. GATX maintains an allowance for losses to provide for credit losses inherent in its reservable assets portfolio.

Concentration of Labor Force — As of December 31, 2012, 35% of GATX's employees were covered by collective bargaining agreements and 4% of GATX's employees were covered by collective bargaining agreements that have expired or will expire within the next year. The hourly employees at GATX’s U.S. service centers belong to the United Steelworkers. Employees at three of GATX’s Canadian service centers belong to the Communication, Energy and Paperworkers Union of Canada. The shipboard personnel at ASC belong to the American Maritime Officers and the Seafarers International Union.

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Pension and Other Post-Retirement Benefits (Details 1) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets [Abstract]
Projected benefit obligations	$ 473.8	$ 425.0
Fair value of plan assets	409.1	377.5
Pension plans with an accumulated benefit obligation in excess of plan assets
Accumulated benefit obligations	453.7	408.9
Fair value of plan assets	$ 409.1	$ 377.5

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Fair Value Disclosure

12 Months Ended

Dec. 31, 2012

Fair Value Disclosures [Abstract]

Fair Value Disclosure

Fair Value Disclosure

The following tables set forth GATX’s assets and liabilities measured at fair value on a recurring basis as of December 31 (in millions):

Assets	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total December 31, 2012
Interest rate derivatives (a)	$	—	$	10.2	$	—	$	10.2
Available for sale equity securities	3.3		—		—		3.3
Liabilities
Interest rate derivatives (a)	—		1.0		—		1.0
Interest rate derivatives (b)	—		0.3		—		0.3
Foreign exchange rate derivatives (b)	—		2.1		—		2.1

Assets	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total December 31, 2011
Interest rate derivatives (a)	$	—	$	15.3	$	—	$	15.3
Foreign exchange rate derivatives (b)	—		2.1		—		2.1
Available for sale equity securities	2.9		—		—		2.9
Liabilities
Interest rate derivatives (a)	—		2.1		—		2.1
Interest rate derivatives (b)	—		0.3		—		0.3

_________

(a)     Designated as hedges

(b)     Not designated as hedges

Available for sale equity securities are valued based on quoted prices on an active exchange. Derivatives are valued using a pricing model with inputs (such as yield curves and credit spreads) that are observable in the market or can be derived principally from or corroborated by observable market data.

The following table sets forth certain disclosures relating to GATX’s non-recurring Level 3 fair value measurements in 2012 and 2011(in millions):

	Fair Value of Assets		Impairment Losses
2012
Investment in affiliated companies	$	32.9	$	14.8
Operating assets	0.7		0.7
2011
Operating assets	2.8		4.1

In 2012, impairment losses related to the Enerven affiliate and a corporate aircraft on lease. In 2011, impairment losses related to the corporate aircraft on lease and a helicopter held for sale. The fair value of the Enerven affiliate was primarily based on expected final proceeds to be received after all sale and liquidation proceedings are concluded. The fair values of the operating assets were based primarily on the expected future proceeds to be received from the assets, including their disposition.

Derivative instruments

Fair Value Hedges — GATX uses interest rate swaps to convert fixed rate debt to floating rate debt and to manage the fixed to floating rate mix of its debt obligations. For fair value hedges, changes in fair value of both the derivative and the hedged item are recognized in earnings as interest expense. As of December 31, 2012 and 2011, GATX had one instrument and three instruments outstanding, respectively, with an aggregate notional amount of $100.0 million and $350.0 million, respectively. As of December 31, 2012, this derivative had a maturity in 2015.

Cash Flow Hedges — GATX uses interest rate swaps to convert floating rate debt to fixed rate debt and to manage the fixed to floating rate mix of its debt obligations. GATX also uses interest rate swaps and Treasury rate locks to hedge its exposure to interest rate risk on existing and anticipated transactions. As of December 31, 2012 and 2011, GATX had 12 instruments and 11 instruments outstanding, respectively, with an aggregate notional amount of $129.2 million and $73.4 million, respectively. As of December 31, 2012, these derivatives had maturities ranging from 2013-2019. Within the next 12 months, GATX expects to reclassify $6.8 million ($4.3 million after-tax) of net losses on previously terminated derivatives from accumulated other comprehensive income (loss) to earnings. Amounts are reclassified when interest and operating expense related to the hedged risks affect earnings.

Non-designated Derivatives — GATX does not hold or issue derivative financial instruments for purposes other than hedging, although certain derivatives are not designated as accounting hedges. Changes in the fair value of these derivatives are recognized in earnings immediately.

Certain of GATX’s derivative instruments contain credit risk provisions that could require GATX to make immediate payment on net liability positions in the event that GATX defaulted on certain outstanding debt obligations. The aggregate fair value of all derivative instruments with credit risk related contingent features that are in a liability position as of December 31, 2012, was $3.4 million. GATX is not required to post any collateral on its derivative instruments and does not expect the credit risk provisions to be triggered.

In the event that a counterparty fails to meet the terms of the interest rate swap agreement or a foreign exchange contract, GATX’s exposure is limited to the fair value of the swap if in GATX’s favor. GATX manages the credit risk of counterparties by transacting only with institutions that the Company considers financially sound and by avoiding concentrations of risk with a single counterparty. GATX considers the risk of non-performance by a counterparty to be remote.

The income statement and other comprehensive income (loss) impacts of GATX’s derivative instruments for the years ended December 31 were (in millions):

Derivative Designation	Location of Gain (Loss) Recognized	2012			2011			2010
Fair value hedges *	Interest expense	$	5.0		$	2.3		$	(7.4	)
Cash flow hedges	Other comprehensive loss (effective portion)	(0.2		)	(5.9		)	(8.1		)
Cash flow hedges	Interest expense (effective portion reclassified from accumulated other comprehensive loss)	4.2			2.5			7.7
Cash flow hedges	Operating lease expense (effective portion reclassified from accumulated other comprehensive loss)	1.4			1.5			1.5
Cash flow hedges	Other (expense) income (ineffective portion)	(0.1		)	—			(0.1		)
Non-designated	Other (expense) income	(5.0		)	1.8			0.4

_________

(*) Equally offsetting the amount recognized in interest expense was the fair value adjustment relating to the underlying debt.

Other Financial Instruments

The carrying amounts of cash and cash equivalents, restricted cash, rent and other receivables, accounts payable, and commercial paper and bank credit facilities approximate fair value due to the short maturity of those instruments. The fair values of investment funds are based on the best information available and may include quoted investment fund values. The fair values of loans and fixed and floating rate debt were estimated based on discounted cash flow analyses using interest rates currently offered for loans with similar terms to borrowers of similar credit quality. The following table sets forth the carrying amounts and fair values of GATX’s other financial instruments as of December 31 (in millions):

	2012		2012		2011		2011
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets
Investment Funds	$	2.5	$	5.8	$	2.7	$	7.4
Loans	27.2		27.7		30.4		30.7
Liabilities
Recourse fixed rate debt	$	2,343.3	$	2,513.4	$	2,627.2	$	2,754.9
Recourse floating rate debt	809.1		807.9		727.6		714.8
Nonrecourse debt	130.6		138.2		149.4		159.3

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Leases (Details 2) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Assets that are financed with capital lease obligations
Capital leased assets, gross	$ 79.9	$ 82.6
Less: allowance for depreciation	(67.9)	(67.7)
Capital leased assets, net	12.0	14.9
Railcars [Member]
Assets that are financed with capital lease obligations
Capital leased assets, gross	0	3.6
Marine vessels [Member]
Assets that are financed with capital lease obligations
Capital leased assets, gross	$ 79.9	$ 79.0

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Allowance for Losses (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Changes in the allowance for possible losses
Beginning balance	$ 11.8	$ 11.6
(Reversal) provision for losses	(0.6)	0.2
Charges to allowance	(7.8)	(0.5)
Recoveries and other, including foreign exchange adjustments	1.2	0.5
Ending balance	$ 4.6	$ 11.8

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Variable Interest Entities

12 Months Ended

Dec. 31, 2012

Variable Interest Entity, Not Primary Beneficiary, Disclosures [Abstract]

Variable Interest Entities

Variable Interest Entities

GATX evaluates whether an entity is a variable interest entity (“VIE”) based on the sufficiency of the entity's equity and whether the equity holders have the characteristics of a controlling financial interest.  To determine if it is the primary beneficiary of a VIE, GATX assesses whether it has the power to direct the activities that most significantly impact the economic performance of the VIE and the obligation to absorb losses or the right to receive benefits that may be significant to the VIE. These determinations are both qualitative and quantitative in nature and require certain judgments and assumptions about the VIE's forecasted financial performance and the volatility inherent in those forecasted results. GATX evaluates new investments for VIE determination and regularly reviews all existing entities for any events that may result in an entity becoming a VIE or GATX becoming the primary beneficiary of an existing VIE.

GATX is the primary beneficiary of a consolidated VIE related to a structured lease financing of a portfolio of railcars because it has the power to direct the significant activities of the VIE through its ownership of the equity interests in the transaction. The risks associated with this VIE are substantially similar to those of GATX's wholly-owned railcar leasing activities.

The carrying amounts of assets and liabilities of the VIE as of December 31 were (in millions):

	2012		2011
Operating assets, net of accumulated depreciation *	$	98.4	$	104.3
Nonrecourse debt	35.1		45.2

_________

(*) All operating assets are pledged as collateral on the nonrecourse debt.

GATX is also involved with other entities determined to be VIEs of which GATX is not the primary beneficiary. These VIEs are primarily leveraged leases and certain investments in railcar and equipment leasing affiliates that have been financed through a mix of equity investments and third-party lending arrangements. GATX determined that it is not the primary beneficiary of these VIEs because it does not have the power to direct the activities that most significantly impact the entities’ economic performance. For certain investments in affiliates determined to be VIEs, GATX concluded that power was shared between the affiliate partners based on the terms of the relevant joint venture agreements, which require approval of all partners for significant decisions involving the VIE.

The carrying amounts and maximum exposure to loss with respect to VIEs that GATX does not consolidate as of December 31 were (in millions):

	2012				2011
	Net Carrying Amount		Maximum Exposure to Loss		Net Carrying Amount		Maximum Exposure to Loss
Investments in affiliates	$	110.7	$	110.7	$	72.2	$	72.2
Leveraged leases	—		—		78.5		78.5
Other investment	0.7		0.7		0.9		0.9
Total	$	111.4	$	111.4	$	151.6	$	151.6

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Debt

12 Months Ended

Dec. 31, 2012

Debt Disclosure [Abstract]

Debt

Debt

Commercial Paper and Borrowings Under Bank Credit Facilities ($ in millions)

	December 31
	2012			2011
Balance	$	273.6		$	28.6
Weighted average interest rate	0.72		%	1.26		%

Credit Lines and Facilities

GATX has a $560 million unsecured revolving credit facility in the U.S. that matures in May 2015. At December 31, 2012, availability under this facility was $365.3 million, with $185.0 million of commercial paper outstanding and $9.7 million of letters of credit issued, both backed by the facility. Annual commitment fees for the revolving credit facility are based on a percentage of the commitment and were $1.2 million, $0.9 million and $0.4 million for 2012, 2011 and 2010, respectively. GATX also has unsecured lines of credit in Europe totaling $112.1 million. At December 31, 2012, availability under these lines of credit was $23.5 million.

Recourse and Nonrecourse Debt Obligations

Outstanding balances of GATX’s debt obligations and the applicable interest rates as of December 31 ($ in millions):

	Date of Issue	Final Maturity	Interest Rate		2012		2011
Recourse Fixed Rate Debt
Unsecured	04/30/09	05/15/14	8.75	%	$	300.0	$	300.0
Unsecured	02/05/10	05/15/15	4.75	%	250.0		250.0
Unsecured	11/19/10	07/15/16	3.50	%	250.0		250.0
Unsecured	05/27/11	06/01/21	4.85	%	250.0		250.0
Unsecured	06/11/12	06/15/22	4.75	%	250.0		—
Unsecured	02/06/08	02/15/18	6.00	%	200.0		200.0
Unsecured	03/03/06	03/01/16	5.80	%	200.0		200.0
Secured	11/06/08	11/15/13	9.00	%	159.9		168.3
Unsecured	12/22/05	12/22/15	5.75	%	100.0		115.0
Unsecured	09/20/11	07/15/16	3.50	%	100.0		100.0
Unsecured	04/14/05	04/15/15	5.70	%	100.0		100.0
Unsecured	09/20/11	06/01/21	4.85	%	50.0		50.0
Unsecured	12/27/10	10/31/18	3.84	%	21.1		20.7
Unsecured	11/29/10	11/30/18	3.70	%	19.8		20.7
Unsecured	09/24/09	10/01/12	4.75	%	—		300.0
Unsecured	10/11/06	02/15/12	5.50	%	—		200.0
Unsecured	03/29/06	12/11/12	3.49	%	—		40.5
Unsecured	12/18/07	11/30/12	4.70	%	—		27.2
Unsecured	06/29/07	05/31/12	4.25	%	—		22.7
Unsecured	02/11/02	07/31/12	5.73	%	—		0.6
Unsecured	02/11/02	01/31/12	5.83	%	—		0.2
Total recourse fixed rate debt					$	2,250.8	$	2,615.9
Recourse Floating Rate Debt *
Unsecured	12/12/11	06/12/17	2.25	%	$	107.5	$	115.0
Unsecured	03/18/08	03/18/14	1.25	%	100.0		150.0
Unsecured	05/17/11	05/17/13	1.50	%	100.0		100.0
Unsecured	12/21/12	12/21/17	1.88	%	100.0		—
Secured	12/19/11	12/19/20	2.10	%	95.5		100.0
Unsecured	06/30/06	06/28/13	0.90	%	70.0		100.0
Unsecured	08/31/12	12/31/19	2.47	%	66.0		—
Unsecured	12/15/10	10/31/15	1.58	%	42.9		49.9
Unsecured	03/29/06	09/30/16	2.09	%	41.2		—
Secured	05/14/09	05/14/14	2.86	%	38.0		41.4
Unsecured	01/12/12	06/12/17	2.25	%	35.0		—
Unsecured	12/18/07	10/31/16	2.01	%	27.7		—
Unsecured	12/06/11	08/31/16	1.56	%	25.8		29.8
Unsecured	06/29/07	09/30/16	2.17	%	18.4		—
Unsecured	09/02/11	11/30/16	1.24	%	13.4		15.6
Unsecured	03/01/10	02/28/15	1.97	%	13.2		13.0
Unsecured	12/31/03	09/30/13	1.73	%	1.8		4.3
Unsecured	12/27/10	06/30/12	2.84	%	—		5.2
Unsecured	11/29/10	12/31/12	2.20	%	—		1.9

	Date of Issue	Final Maturity	Interest Rate		2012			2011
Unsecured	12/15/03	12/15/12	1.63	%	—			1.2
Unsecured	12/31/03	12/31/12	1.53	%	—			0.3
Total recourse floating rate debt					$	896.4		$	727.6
Nonrecourse Fixed Rate Debt
Secured	09/30/97	09/20/16	6.69	%	$	35.1		$	45.2
Secured	06/13/06	12/31/13	6.26	%	21.4			22.2
Secured	08/01/07	06/30/17	6.77	%	2.5			2.5
Secured	06/16/06	04/29/16	6.80	%	1.3			1.3
Secured	08/01/07	07/31/17	6.78	%	0.8			0.8
Secured	05/29/07	05/31/12	5.84	%	—			3.5
Secured	06/01/07	05/31/12	6.27	%	—			2.4
Secured	05/11/07	05/31/12	6.06	%	—			1.4
Total nonrecourse fixed rate debt					$	61.1		$	79.3
Nonrecourse Floating Rate Debt *
Secured	Various	05/08/14	1.46	%	$	49.3		$	51.0
Secured	Various	01/15/15	1.46	%	23.5			24.4
Total nonrecourse floating rate debt					$	72.8		$	75.4
Total debt principal					$	3,281.1		$	3,498.2
Debt discount, net					(8.3		)	(9.3		)
Debt adjustment for fair value hedges					10.2			15.3
Total Debt					$	3,283.0		$	3,504.2

_________

(*) Floating rates as of December 31, 2012.

Maturities of GATX’s debt obligations as of December 31, 2012, were as follows (in millions):

	Debt Principal
2013	$	485.7
2014	513.6
2015	552.5
2016	626.9
2017	236.2
Thereafter	866.2
Total debt principal	$	3,281.1

At December 31, 2012, $606.7 million of GATX’s operating assets were pledged as collateral for notes or other obligations.

Shelf Registration Statement

GATX maintains an effective shelf registration statement on file with the SEC that enables it to issue public debt securities and pass-through certificates. The registration statement expires in August 2013.

Restrictive Covenants

GATX’s $560 million revolving credit facility contains various restrictive covenants, including requirements to maintain a fixed charge coverage ratio and an asset coverage test. GATX’s ratio of earnings to fixed charges, as defined in this facility, was 1.8 for the period ended December 31, 2012, in excess of the minimum covenant ratio of 1.2. At December 31, 2012, GATX was in compliance with all covenants and conditions of the facility. Certain of GATX’s bank term loans have the same financial covenants as the facility.

The indentures for GATX’s public debt also contain various restrictive covenants, including limitation on liens provisions, that limit the amount of additional secured indebtedness that GATX may incur to $918.6 million as of December 31, 2012. Additionally, certain exceptions to the covenants permit GATX to incur an unlimited amount of purchase money and nonrecourse indebtedness. At December 31, 2012, GATX was in compliance with all covenants and conditions of the indentures.

The loan agreements for certain of GATX’s wholly-owned European subsidiaries (collectively, “GRE”) also contain restrictive covenants, including leverage and cash flow covenants specific to those subsidiaries, restrictions on making loans and limitations on the ability of these subsidiaries to repay loans to certain related parties (including GATX) and to pay dividends to GATX. The covenants relating to loans and dividends effectively limit the ability of GRE to transfer funds to GATX. At December 31, 2012, the maximum amount that GRE could transfer to GATX without violating its covenants was $81.4 million, implying that $389.7 million of subsidiary net assets were restricted. At December 31, 2012, GRE was in compliance with all covenants and conditions of these loan agreements.

Another subsidiary’s financing, guaranteed by GATX, contains various restrictive covenants, including requirements for GATX to maintain a defined net worth and a fixed charge coverage ratio. This fixed charge coverage ratio covenant is less restrictive than that contained in the revolving credit facility.

GATX does not anticipate any covenant violations nor does it anticipate that any of these covenants will restrict its operations or its ability to procure additional financing.

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Pension and Other Post-Retirement Benefits

12 Months Ended

Dec. 31, 2012

Compensation and Retirement Disclosure [Abstract]

Pension and Other Post-Retirement Benefits

Pension and Other Post-Retirement Benefits

GATX maintains both funded and unfunded noncontributory defined benefit pension plans covering its domestic employees and the employees of certain of its subsidiaries. GATX also has a funded noncontributory defined benefit pension plan related to a former business in the United Kingdom (“U.K.”), which has no active employees. Benefits payable under the pension plans are based on years of service and/or final average salary. GATX’s funding policies for the pension plans are based on actuarially determined cost methods allowable under IRS regulations and statutory requirements in the U.K.

In addition to the pension plans, GATX has other post-retirement plans providing health care, life insurance and other benefits for certain retired domestic employees who meet established criteria. Most domestic employees are eligible for health care and life insurance benefits if they retire from GATX with immediate benefits under the GATX pension plan. The other post-retirement plans are either contributory or noncontributory, depending on various factors.

GATX uses a December 31 measurement date for all of its plans. The following tables set forth pension obligations and plan assets and other post-retirement obligations as of December 31 (in millions):

	2012			2011			2012			2011
							Retiree Health and Life			Retiree Health and Life
	Pension Benefits			Pension Benefits
Change in Benefit Obligation
Benefit obligation at beginning of year	$	425.0		$	413.2		$	44.8		$	46.6
Service cost	5.7			5.4			0.2			0.2
Interest cost	19.7			20.7			2.0			2.2
Actuarial loss	49.2			13.5			4.9			—
Benefits paid	(27.4		)	(27.5		)	(3.8		)	(4.2		)
Effect of foreign exchange rate changes	1.6			(0.3		)	—			—
Benefit obligation at end of year	$	473.8		$	425.0		$	48.1		$	44.8
Change in Fair Value of Plan Assets
Plan assets at beginning of year	377.5			392.7			—			—
Actual return on plan assets	55.3			10.2			—			—
Effect of exchange rate changes	1.6			(0.1		)	—			—
Company contributions	2.1			2.2			3.8			4.2
Benefits paid	(27.4		)	(27.5		)	(3.8		)	(4.2		)
Plan assets at end of year	$	409.1		$	377.5		$	—		$	—
Funded Status at end of year	$	(64.7	)	$	(47.5	)	$	(48.1	)	$	(44.8	)
Amount Recognized
Other liabilities	$	(64.7	)	$	(47.5	)	$	(48.1	)	$	(44.8	)
Accumulative other comprehensive loss:
Net actuarial loss	207.4			193.5			6.8			1.8
Prior service credit (cost)	(4.1		)	(5.1		)	0.2			—
Accumulated other comprehensive loss	203.3			188.4			7.0			1.8
Total recognized	$	138.6		$	140.9		$	(41.1	)	$	(43.0	)
After-tax amount recognized in accumulated other comprehensive loss	$	126.8		$	117.6		$	4.3		$	1.1

The aggregate accumulated benefit obligation for the defined benefit pension plans was $453.7 million and $408.9 million at December 31, 2012 and 2011, respectively.

Information for pension plans with a projected benefit obligation in excess of plan assets is as followes as of December 31 (in millions):

	2012		2011
Projected benefit obligations	$	473.8	$	425.0
Fair value of plan assets	409.1		377.5

Information for pension plans with an accumulated benefit obligation in excess of plan assets is as follows as of December 31 (in millions):

	2012		2011
Accumulated benefit obligations	$	453.7	$	408.9
Fair value of plan assets	409.1		377.5

The components of net periodic (benefit) cost for the year ended December 31 were (in millions):

										2012 Retiree Health and Life			2011 Retiree Health and Life			2010 Retiree Health and Life
	2012 Pension Benefits			2011 Pension Benefits			2010 Pension Benefits
Service cost	$	5.7		$	5.4		$	5.3		$	0.2		$	0.2		$	0.2
Interest cost	19.7			20.7			22.1			2.0			2.2			2.4
Expected return on plan assets	(29.6		)	(33.2		)	(33.5		)	—			—			—
Amortization of:
Unrecognized prior service credit	(1.0		)	(1.0		)	(1.0		)	(0.1		)	(0.1		)	(0.1		)
Unrecognized net actuarial loss (gain)	9.9			7.2			6.0			(0.1		)	(0.3		)	(0.3		)
Net periodic (benefit) cost	$	4.7		$	(0.9	)	$	(1.1	)	$	2.0		$	2.0		$	2.2

GATX amortizes the unrecognized prior service credit using a straight-line method over the average remaining service period of employees expected to receive benefits under the plan. The unrecognized net actuarial loss (gain), subject to certain averaging conventions, is amortized over the average remaining service period of active employees.

As of December 31, 2012, GATX expects within the next twelve months to recognize the following amounts included in accumulated other comprehensive loss (gain) as components of net periodic cost (in millions):

	2013
	Pension Benefits			Retiree Health and Life
Unrecognized net actuarial loss (gain)	$	14.0		$	(0.2	)
Unrecognized prior service credit	(1.0		)	(0.1		)

GATX used the following assumptions to measure the benefit obligation, compute the expected long-term return on assets and measure the periodic cost for GATX’s defined benefit pension plans and other post-retirement benefit plans for the years ended December 31:

	2012		2011
Domestic defined benefit pension plans
Benefit Obligation at December 31:
Discount rate — salaried funded and unfunded plans	3.95	%	4.80	%
Discount rate — hourly funded plan	4.05	%	4.85	%
Rate of compensation increases — salaried funded and unfunded plans	3.00	%	3.00	%
Rate of compensation increases — hourly funded plans	N/A		N/A
Net Periodic Cost (Benefit) for the years ended December 31:
Discount rate — salaried funded and unfunded plans	4.80	%	5.25	%
Discount rate — hourly funded plan	4.85	%	5.25	%
Expected return on plan assets — salaried funded plan	8.05	%	8.65	%
Expected return on plan assets — hourly funded plan	7.10	%	7.80	%
Rate of compensation increases — salaried funded and unfunded plans	3.00	%	4.50	%
Rate of compensation increases — hourly funded plan	N/A		N/A
Foreign defined benefit pension plan
Benefit Obligation at December 31:
Discount rate	4.25	%	4.65	%
Rate of pension-in-payment increases	3.00	%	2.90	%
Net Periodic Cost (Benefit) for the years ended December 31:
Discount rate	4.65	%	5.40	%
Expected return on plan assets	5.77	%	6.12	%
Rate of pension-in-payment increases	2.90	%	3.40	%
Other post-retirement benefit plans
Benefit Obligation at December 31:
Discount rate - salaried health	3.65	%	4.50	%
Discount rate - hourly health	3.60	%	4.60	%
Discount rate - salaried life insurance	3.90	%	4.75	%
Discount rate - hourly life insurance	3.45	%	4.45	%
Rate of compensation increases	N/A		N/A
Net Periodic Cost (Benefit) for the years ended December 31:
Discount rate - salaried health	4.50	%	4.95	%
Discount rate - hourly health	4.60	%	4.95	%
Discount rate - salaried life insurance	4.75	%	4.95	%
Discount rate - hourly life insurance	4.45	%	4.95	%
Rate of compensation increases	N/A		N/A

The discount rate is used by GATX to calculate the present value of expected future pension and post-retirement cash flows as of the measurement date. The discount rate is based on yields for high-quality, long-term bonds, with durations similar to that of the projected benefit obligation. The expected return on plan assets is based on current and expected asset allocations, as well as historical and expected returns on various categories of plan assets. GATX routinely reviews its historical returns along with current market conditions to ensure its expected return assumption is reasonable and appropriate.

	2012		2011
Assumed Health Care Cost Trend Rates at December 31
Health care cost trend assumed for next year
Medical claims	7.00	%	7.50	%
Prescription drugs claims	6.50	%	7.50	%
Rate to which the cost trend is expected to decline (the ultimate trend rate)
Medical claims	5.00	%	5.00	%
Prescription drugs claims	5.00	%	5.00	%
Year that rate reaches the ultimate trend rate
Medical claims	2019		2018
Prescription drugs claims	2017		2018

The health care cost trend, which is comprised of medical and prescription drug claims, has a significant effect on the other post-retirement benefit cost and obligation. A one-percentage-point change in the trend rate would have the following effects (in millions):

	One-Percentage-Point Increase		One-Percentage-Point Decrease
Effect on total of service and interest cost	$	0.1	$	(0.1	)
Effect on post-retirement benefit obligation	2.5		(2.2		)

GATX’s investment policies require that asset allocations of domestic and foreign funded pension plans be maintained at certain targets. GATX’s weighted-average asset allocations of its domestic funded pension plans at December 31, 2012 and 2011, and current target asset allocation for 2012, by asset category, are as follows:

			Plan Assets at December 31
	Target		2012		2011
Asset Category
Equity securities	66.0	%	65.3	%	64.1	%
Debt securities	29.0	%	28.9	%	30.1	%
Real estate	5.0	%	5.8	%	5.2	%
Cash	—		—		0.6	%
	100.0	%	100.0	%	100.0	%

GATX’s weighted-average asset allocations of its foreign funded pension plan at December 31, 2012 and 2011, and current target asset allocation for 2013, by asset category, are as follows:

			Plan Assets at December 31
	Target		2012		2011
Asset Category
Equity securities	36.8	%	36.2	%	36.1	%
Debt securities	63.2	%	63.8	%	63.9	%
	100.0	%	100.0	%	100.0	%

The following tables set forth the fair value of GATX’s pension plan assets as of December 31 (in millions):

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs  ( Level 3)		Total December 31,
							2012
Assets
Short-term investment funds	$	1.0	$	—	$	—	$	1.0
Common stock	10.3		—		—		10.3
Common stock collective funds	—		245.0		—		245.0
Fixed income collective trust funds	—		131.2		—		131.2
Real estate collective trust funds	—		21.6		—		21.6
Total	$	11.3	$	397.8	$	—	$	409.1

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs  ( Level 3)		Total December 31,
							2011
Assets
Short-term investment funds	$	2.9	$	—	$	—	$	2.9
Common stock	8.9		—		—		8.9
Common stock collective funds	—		222.5		—		222.5
Fixed income collective trust funds	—		125.3		—		125.3
Real estate collective trust funds	—		17.9		—		17.9
Total	$	11.8	$	365.7	$	—	$	377.5

The following is a description of the valuation techniques and inputs used as of December 31, 2012 and 2011:

Short-term investment funds: Valued based on the closing net asset values (NAV) quoted by the funds. The NAV represents the unitized fair values of the underlying securities held by the trusts, which are traded in an active market. Short-term investment funds are highly liquid investments in obligations of the U.S. Government, its agencies or instrumentalities, and related money market instruments. There are no unfunded commitments, restrictions on redemption frequency, or advance notice periods required for redemption.

Common stock: Traded in an active market and valued at the last reported sales price on the last business day of the plan year.

Common stock and fixed income collective trust funds: Valued based on the closing NAV prices quoted by the funds. The NAV represents the unitized fair values of the underlying securities held by the trusts, which are traded in an active market. There are no unfunded commitments, restrictions on redemption frequency, or advance notice periods required for redemption for any of the collective trusts. The common stock funds each have an investment objective of long-term total return through capital appreciation and current income. The fixed income funds are each designed to deliver safety and stability by preserving principal and accumulated earnings.

Real estate collective trust funds: Valued based on the NAV provided by the administrators of the funds, which represents the unitized fair values of the underlying U.S. commercial real estate held by the funds. Fair values were determined by independent appraisal of the real estate properties. Redemptions from the real estate funds are available upon either 45 or 60 days’ notice prior to the end of a quarter. Redemptions may be limited and/or delayed by a lack of liquidity in the funds. The real estate funds are diversified by location and property type with an investment objective of long-term return through property appreciation, current income, and timely sales. In 2012, the Company determined that the inputs used to measure the real estate funds at fair value are Level 2 inputs. The fair value disclosures for 2011 have been revised to conform to the 2012 presentation.

The primary investing objective of the pension plans is to represent the exclusive interests of plan participants for the purpose of providing benefits to participants and their beneficiaries. To achieve this goal, GATX’s philosophy is to invest in a diversified portfolio of equities, debt and real estate investments to maximize return and to keep risk at a reasonable level over a long-term investment horizon. Equity investments are diversified across U.S. and non-U.S. stocks as well as growth, value and small to large capitalizations. Debt securities are predominately invested in long-term, investment-grade corporate bonds. Real estate investments include investments in funds that are diversified by location and property type.

On a timely basis, but not less than twice a year, GATX formally reviews pension plan investments to ensure adherence to investment guidelines and the Company’s stated investment approach. This review also evaluates reasonableness of investment decisions and risk positions. The performance of investments is compared to indices and peers to determine if performance has been acceptable.

In 2013, GATX expects to contribute approximately $7.0 million to its pension and other post-retirement benefit plans. Additional contributions to the domestic funded pension plans will be dependent on several factors, including investment returns on plan assets and actuarial experience.

The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid (in millions):

	Funded Plans		Unfunded Plans		Retiree Health and Life
2013	$	29.2	$	2.0	$	4.4
2014	29.0		1.9		4.3
2015	29.0		1.8		4.0
2016	29.3		2.0		3.9
2017	31.1		2.0		3.6
Years 2018-2022	148.3		11.9		15.0
	$	295.9	$	21.6	$	35.2

The following are estimated Medicare Part D Subsidies expected to be received as a result of the Medicare Prescription Drug, Improvement and Modernization Act of 2003 (in millions):

2013	$	0.5
2014	0.5
2015	0.5
2016	0.5
2017	0.4
Years 2018-2022	2.2
	$	4.6

In addition to its defined benefit plans, GATX maintains two 401(k) retirement plans that are available to substantially all salaried and certain other employee groups. GATX may contribute to the plans as specified by their respective terms and as determined by the Board of Directors. Contributions to such plans were $1.6 million, $1.4 million and zero for 2012, 2011, and 2010, respectively.

Multiemployer Plans

The shipboard personnel at ASC participate in various multiemployer benefit plans that provide pension, health care, post-retirement and other benefits to active and retired employees. Unlike single employer plans, GATX does not recognize plan assets or obligations for multiemployer plans on its balance sheet. Rather, GATX recognizes as marine operating expenses the amounts of its contributions to the plans. The amounts contributed are based on the number of crew hours worked, which is dependent on the number of vessels deployed and aggregate operating days in a particular year. The risks of participating in these multiemployer plans are different from single employer plans in the following aspects:

• Assets contributed by one employer may be used to provide benefits to employees of other participating employers;

• If a participating employer fails to make its required contributions, any unfunded obligations of the plan may be borne by the remaining participating employers; and

• If an employer chooses to stop participating in a multiemployer plan, the withdrawing company may be required to make additional contributions.

GATX’s contributions to multiemployer benefit plans for the years indicated were as follows (in millions):

Multiemployer Plans	EIN and Pension Plan Number	Pension Protection Act Zone Status (b)	GATX Contributions						Collective Bargaining Agreement Expiration Date
			2012		2011		2010
American Maritime Officers Pension Plan (a)	13-1969709-001	Endangered-Yellow	$	1.5	$	2.1	$	2.2	January 15, 2017
Other multiemployer post-retirement plans			6.6		6.4		6.2
Total			$	8.1	$	8.5	$	8.4

__________________

(a)GATX's contributions represented more than 5% of the total contributions to the plan during each year and no surcharge was imposed for any year.

(b)The American Maritime Officers Pension Plan was determined to be in endangered status (i.e. “yellow zone” as defined by the Pension Protection Act of 2006) for the plan year beginning October 1, 2012, because it has funding or liquidity problems, or both. A rehabilitation plan, as defined by the Employee Retirement Security Act of 1974, was instituted under which certain adjustable benefits were reduced or eliminated and GATX is required to contribute at a negotiated rate per day worked by each employee.

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Investments in Affiliated Companies (Share of Affiliate Earnings) (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Pre tax share of affiliates earnings by segment
Share of affiliates' earnings (pre-tax)	$ 21.6	$ 40.6	$ 38.1
Provision for Income Taxes, Equity Method Investment	(2.0)	(8.2)	(9.6)
Share of Affiliates' Earnings	19.6	32.4	28.5
Rail North America [Member]
Pre tax share of affiliates earnings by segment
Share of affiliates' earnings (pre-tax)	6.5	3.9	7.2
Rail International [Member]
Pre tax share of affiliates earnings by segment
Share of affiliates' earnings (pre-tax)	(18.3)	0.5	(6.0)
Portfolio Management [Member]
Pre tax share of affiliates earnings by segment
Share of affiliates' earnings (pre-tax)	$ 33.4	$ 36.2	$ 36.9

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Selected Quarterly Financial Data (unaudited) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2011		Sep. 30, 2011		Jun. 30, 2011		Mar. 31, 2011		Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Selected Quarterly Financial Data (unaudited)
Revenues	$ 331.7		$ 331.9		$ 323.1		$ 256.5		$ 330.0		$ 315.2		$ 296.8		$ 249.4		$ 1,243.2		$ 1,191.4		$ 1,114.0
Net income	29.7		53.8	[1]	23.5	[2]	30.3	[3]	31.6		32.9		26.4		19.9	[3]	137.3		110.8		80.8
Share Data
Basic earnings per share (in dollars per share)	$ 0.63	[4]	$ 1.15	[4]	$ 0.50	[4]	$ 0.65	[3],[4]	$ 0.68	[4]	$ 0.71	[4]	$ 0.57	[4]	$ 0.43	[3],[4]	$ 2.93	[4]	$ 2.39	[4]	$ 1.75
Diluted earnings per share (in dollars per share)	$ 0.62	[4]	$ 1.13	[4]	$ 0.49	[4]	$ 0.64	[3],[4]	$ 0.67	[4]	$ 0.70	[4]	$ 0.56	[4]	$ 0.42	[3],[4]	$ 2.88	[4]	$ 2.35	[4]	$ 1.72
Share of affiliates' earnings (net of tax)																	19.6		32.4		28.5
Expiration of the applicable statute of limitations																	15.5				0
Cash Flow Hedges [Member] | AAE Cargo AG [Member]
Share Data
Share of affiliates' earnings (net of tax)					$ 12.1

[1] The increase in income from the second quarter of 2012 was primarily due to the absence of the hedge loss at AAE and the recognition of $15.5 million of tax benefits.

[2] The decrease in income from the first quarter of 2012 was primarily due to a $12.1 million loss on the termination of a qualified hedge at GATX's AAE Cargo affiliate, partially offset by an increase in seasonal income at ASC.

[3] Total revenues and net income in the first quarter of each year are typically lower than the subsequent quarters due to seasonal inactivity at ASC.

[4] _

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Pension and Other Post-Retirement Benefits (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Pension [Member]
Components of pension and other post retirement benefit costs
Service cost	$ 5.7	$ 5.4	$ 5.3
Interest cost	19.7	20.7	22.1
Expected return on plan assets	(29.6)	(33.2)	(33.5)
Amortization of unrecognized prior service credit	(1.0)	(1.0)	(1.0)
Unrecognized net actuarial loss (gain)	9.9	7.2	6.0
Net periodic (benefit) cost	4.7	(0.9)	(1.1)
Retiree Health and Life [Member]
Components of pension and other post retirement benefit costs
Service cost	0.2	0.2	0.2
Interest cost	2.0	2.2	2.4
Expected return on plan assets	0	0	0
Amortization of unrecognized prior service credit	(0.1)	(0.1)	(0.1)
Unrecognized net actuarial loss (gain)	(0.1)	(0.3)	(0.3)
Net periodic (benefit) cost	$ 2.0	$ 2.0	$ 2.2

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Investments in Affiliated Companies (Guarantees) (Details 4) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Guarantor Obligations [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 104.5	[1]	$ 134.0	[1]
Guarantee of Indebtedness of Others [Member]
Guarantor Obligations [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 42.0		$ 42.0

[1] At December 31, 2012, the carrying value of liabilities on the balance sheet for commercial commitments was $6.4 million. The expirations of these commitments range from 2013 to 2022. GATX is not aware of any event that would require it to satisfy any of these commitments.

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Income Taxes (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current
Federal	$ (8.8)	$ 0.7	$ (0.2)
State and local	2.5	0.8	0.8
Current domestic taxes	(6.3)	1.5	0.6
Foreign	8.0	5.0	5.0
Total current taxes	1.7	6.5	5.6
Deferred
Federal	16.0	8.9	(3.1)
State and local	(3.1)	0.5	0.3
Deferred domestic taxes	12.9	9.4	(2.8)
Foreign	11.5	13.3	4.2
Total deferred taxes	24.4	22.7	1.4
Income taxes	$ 26.1	$ 29.2	$ 7.0

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Investments in Affiliated Companies (Significant Investments in Affiliates) (Details 1) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011	Dec. 31, 2010
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Investments in affiliated companies	$ 502.0		$ 513.8	$ 486.1
Rolls Royce Partners Finance [Member]
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Investments in affiliated companies	208.7	[1]
GATX's Percentage Ownership	50.00%	[1]
Aae Cargo Ag [Member]
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Investments in affiliated companies	74.7
GATX's Percentage Ownership	37.50%
Cardinal Marine Investments Llc [Member]
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Investments in affiliated companies	52.6
GATX's Percentage Ownership	50.00%
Singco Gas Pte Ltd [Member]
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Investments in affiliated companies	40.5
GATX's Percentage Ownership	50.00%
Enerven Compression Llc [Member]
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Investments in affiliated companies	32.9
GATX's Percentage Ownership	45.60%
Adler Funding Llc [Member]
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Investments in affiliated companies	26.7
GATX's Percentage Ownership	12.50%
Southern Capital Corp [Member]
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Investments in affiliated companies	20.2
GATX's Percentage Ownership	50.00%
Intermodal Investment Fund V [Member]
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Investments in affiliated companies	18.1
GATX's Percentage Ownership	50.00%
Somargas Ii Private Limited [Member]
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Investments in affiliated companies	15.4
GATX's Percentage Ownership	35.00%
Other Affiliates [Member]
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Investments in affiliated companies	$ 12.2
RRPF Joint Ventures [Member]
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Number of joint venture investments	14

[1] Combined investment balances of fourteen separate joint ventures (collectively, the "RRPF Affiliates")

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Pension and Other Post-Retirement Benefits (Details 9) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012
Expected Subsidies to be received
2013	$ 0.5
2014	0.5
2015	0.5
2016	0.5
2017	0.4
Years 2018-2022	2.2
Total	4.6
Qualified Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
2013	29.2
2014	29.0
2015	29.0
2016	29.3
2017	31.1
Years 2018-2022	148.3
Total	295.9
Nonqualified Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
2013	2.0
2014	1.9
2015	1.8
2016	2.0
2017	2.0
Years 2018-2022	11.9
Total	21.6
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
2013	4.4
2014	4.3
2015	4.0
2016	3.9
2017	3.6
Years 2018-2022	15.0
Total	$ 35.2

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Supplemental Cash Flow and Noncash Investing Transactions (Tables)

12 Months Ended

Dec. 31, 2012

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow Information

	2012		2011			2010
Supplemental Cash Flow Information (in millions)
Interest paid *	$	162.3	$	152.7		$	152.6
Income taxes paid (refunded), net	11.1		(2.8		)	13.0

________

(*) Interest paid consisted of interest on debt obligations, interest rate swaps (net of interest received) and capital lease interest. Interest expense capitalized as part of the cost of construction of major assets was immaterial for all periods presented.

Noncash Investing Transactions

Noncash Investing Transaction (in millions)	2011
Operating assets received *	$	88.8

________

(*) In connection with the dissolutions of GATX's Clipper Fourth Limited and Clipper Fourth APS affiliates, GATX received liquidating distributions of six vessels with an aggregate fair value of $88.8 million. See Note 6 for additional information.

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Selected Quarterly Financial Data (unaudited) (Tables)

12 Months Ended

Dec. 31, 2012

Quarterly Financial Information Disclosure [Abstract]

Selected Quarterly Financial Data (unaudited)

	First  Quarter		(a)	Second Quarter			Third Quarter			Fourth Quarter		Total
	In millions, except per share data
2012
Total revenues	$	256.5		$	323.1		$	331.9		$	331.7	$	1,243.2
Net income	$	30.3		$	23.5	(b)	$	53.8	(c)	$	29.7	$	137.3
Per Share Data
Basic	$	0.65		$	0.50		$	1.15		$	0.63	$	2.93
Diluted	$	0.64		$	0.49		$	1.13		$	0.62	$	2.88
2011
Total revenues	$	249.4		$	296.8		$	315.2		$	330.0	$	1,191.4
Net income	$	19.9		$	26.4		$	32.9		$	31.6	$	110.8
Per Share Data
Basic	$	0.43		$	0.57		$	0.71		$	0.68	$	2.39
Diluted	$	0.42		$	0.56		$	0.70		$	0.67	$	2.35

___________________

(a) Total revenues and net income in the first quarter of each year are typically lower than the subsequent quarters due to seasonal inactivity at ASC.

(b) The decrease in income from the first quarter of 2012 was primarily due to a $12.1 million loss on the termination of a qualified hedge at GATX's AAE Cargo affiliate, partially offset by an increase in seasonal income at ASC.

(c) The increase in income from the second quarter of 2012 was primarily due to the absence of the hedge loss at AAE and the recognition of $15.5 million of tax benefits.

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Earnings Per Share

12 Months Ended

Dec. 31, 2012

Earnings Per Share [Abstract]

Earnings Per Share

Earnings per Share

Basic earnings per share were computed by dividing net income available to common shareholders by the weighted average number of shares of common stock outstanding during each year. Shares issued or reacquired during the year, if applicable, were weighted for the portion of the year that they were outstanding. Diluted earnings per share give effect to potentially dilutive securities, including convertible preferred stock, employee stock options/SARs, restricted stock and convertible debt and equity compensation awards.

The following table sets forth the computation of basic and diluted net income per common share for the years ending December 31 (in millions, except per share data):

	2012		2011		2010
Numerator:
Net income	$	137.3	$	110.8	$	80.8
Numerator for basic earnings per share — income available to common shareholders	$	137.3	$	110.8	$	80.8
Effect of dilutive securities:
After-tax interest expense on convertible securities	—		—		0.2
Numerator for diluted earnings per share — income available to common shareholders	$	137.3	$	110.8	$	81.0
Denominator:
Denominator for basic earnings per share — weighted average shares	46.8		46.4		46.1
Effect of dilutive securities:
Equity compensation plans	0.7		0.7		0.5
Convertible preferred stock	0.1		0.1		0.1
Convertible securities	—		—		0.3
Denominator for diluted earnings per share — adjusted weighted average and assumed conversion	47.6		47.2		47.0
Basic earnings per share	$	2.93	$	2.39	$	1.75
Diluted earnings per share	$	2.88	$	2.35	$	1.72

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Shareholders' Equity (Details Textual) (USD $)	1 Months Ended	12 Months Ended
	Jan. 31, 2008	Dec. 31, 2012	Dec. 31, 2011
Shareholders' Equity (Textual)
Common stock authorized under repurchase program	$ 200,000,000
Stock repurchase program, remaining authorized repurchase amount		68,400,000
Stock repurchased, value		0	0
Stock repurchases, shares		0	0
Common stock, shares authorized		120,000,000	120,000,000
Common stock, par value		$ 0.625	$ 0.625
Common stock, shares issued		66,021,444	65,775,568
Common stock, shares outstanding		46,898,924	46,653,048
Preferred stock, aggregate liquidation preference		900,000	1,000,000
Number of votes for each share held of common stock		1
Series A and B $2.50 Cumulative Convertible Preferred Stock [Member]
Shareholders' Equity (Textual)
Preferred stock, shares authorized		5,000,000	5,000,000
Preferred stock, par value		$ 1	$ 1
Preferred stock, shares outstanding		15,567	16,644
Cumulative annual cash dividend per share on preferred stock		$ 2.50	$ 2.5
Number of common stock issued for each convertible preferred stock		5
Redemption price per share		$ 63
Liquidation preference per share		$ 60
Preferred stock, aggregate liquidation preference		$ 900,000	$ 1,000,000

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Accumulated Other Comprehensive Income (Loss)

12 Months Ended

Dec. 31, 2012

Equity [Abstract]

Accumulated Other Comprehensive Income (Loss)

Accumulated Other Comprehensive Income (Loss)

The change in components for accumulated other comprehensive income (loss) were as follows (in millions):

	Foreign    Currency  Translation  Gain (Loss)			Unrealized  Gain (Loss) on Securities			Unrealized Loss on    Derivative Instruments			Post- RetirementBenefit Plans			Total
Balance at December 31, 2009	$	74.4		$	(1.7	)	$	(52.2	)	$	(105.0	)	$	(84.5	)
Change in component	(28.4		)	1.4			(12.2		)	3.7			(35.5		)
Reclassification adjustments into earnings	—			—			9.2			4.5			13.7
Income tax effect	—			(0.1		)	(0.5		)	(3.1		)	(3.7		)
Balance at December 31, 2010	46.0			(0.4		)	(55.7		)	(99.9		)	(110.0		)
Change in component	(41.2		)	(1.2		)	(6.6		)	(36.0		)	(85.0		)
Reclassification adjustments into earnings	1.6			0.9			4.0			5.8			12.3
Income tax effect	—			0.1			2.1			11.4			13.6
Balance at December 31, 2011	6.4			(0.6		)	(56.2		)	(118.7		)	(169.1		)
Change in component	25.0			0.5			6.2			(28.8		)	2.9
Reclassification adjustments into earnings	—			(0.4		)	6.5			8.7			14.8
Income tax effect	—			0.1			(1.0		)	7.7			6.8
Balance at December 31, 2012	$	31.4		$	(0.4	)	$	(44.5	)	$	(131.1	)	$	(144.6	)

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Pension and Other Postretirement Benefits (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012
Defined Benefit Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Unrecognized net actuarial loss (gain)	$ 14.0
Unrecognized prior service credit	(1.0)
Retiree Health and Life [Member]
Defined Benefit Plan Disclosure [Line Items]
Unrecognized net actuarial loss (gain)	(0.2)
Unrecognized prior service credit	$ (0.1)

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Foreign Operations (Tables)

12 Months Ended

Dec. 31, 2012

Concentration Risks, Types, No Concentration Percentage [Abstract]

Foreign operations data

The table below presents certain GATX data for the years ending or as of December 31 (in millions):

	2012		2011		2010
Revenues
Foreign	$	279.8	$	278.6	$	270.7
United States	963.4		912.8		843.3
	$	1,243.2	$	1,191.4	$	1,114.0
Identifiable Assets
Foreign	$	1,897.9	$	1,766.6	$	1,806.8
United States	4,157.5		4,090.9		3,635.6
	$	6,055.4	$	5,857.5	$	5,442.4

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Concentrations (Details)	12 Months Ended
	Dec. 31, 2012 Service_Center
Canadian
Concentration [Abstract]
Number of service centers	3
Chemical Industry [Member]
Concentration [Abstract]
Approximate percentage of revenue	23.00%
Petroleum Industry [Member]
Concentration [Abstract]
Approximate percentage of revenue	20.00%
Transportation Industry [Member]
Concentration [Abstract]
Approximate percentage of revenue	15.00%
Steel Industry [Member]
Concentration [Abstract]
Approximate percentage of revenue	12.00%
Food/Agriculture [Member]
Concentration [Abstract]
Approximate percentage of revenue	11.00%
Percentage of employees covered by union contracts [Member]
Concentration [Abstract]
Approximate percentage of revenue	35.00%
Percentage of employees covered by union contracts, expiring within an year [Member]
Concentration [Abstract]
Approximate percentage of revenue	4.00%

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Share Based Compensation (Tables)

12 Months Ended

Dec. 31, 2012

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Weighted average estimated fair value

The weighted average fair value for GATX’s SARs and the assumptions used to estimate fair value were:

	2012			2011			2010
Weighted average estimated fair value	$	18.48		$	13.88		$	11.13
Quarterly dividend rate	$	0.29		$	0.29		$	0.28
Expected term of SAR, in years	4.7			4.3			4.3
Risk-free interest rate	1.0		%	1.6		%	2.0		%
Dividend yield	2.7		%	3.4		%	4.3		%
Expected stock price volatility	43.3		%	41.9		%	41.8		%
Present value of dividends	$	5.37		$	4.76		$	4.55

Data with respect to stock options/SARs activity

Certain data with respect to stock option and SAR activity for the year ended December 31, 2012, were:

	Number of Options and SARs (in thousands)	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value (in millions)
Outstanding at beginning of the year	1,879	$	31.08
Granted	350	43.99
Exercised	(341)	28.99			$	4.9
Forfeited/Cancelled	(10)	37.15
Expired	(6)	38.95
Outstanding at end of the year	1,872	33.82		3.7	18.0
Vested and exercisable at end of the year	1,146	31.48		2.6	13.8

Restricted stock and performance share activity

Certain data with respect to restricted and performance share activity for the year ended December 31, 2012, were:

	Number of Share Units Outstanding		Weighted Average Grant-Date Fair Value
Restricted Shares:
Nonvested at beginning of the year	333,837		$	29.04
Granted	75,580		43.71
Vested	(134,508	)	25.10
Forfeited	(7,919	)	33.87
Nonvested at end of the year	266,990		35.03
Performance Shares:
Nonvested at beginning of the year	188,434		$	30.36
Granted	76,780		44.02
Net increase due to estimated performance	9,567		40.81
Vested	(85,575	)	25.96
Nonvested at end of the year	189,206		38.42

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Commercial Commitments (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Guarantees [Abstract]
Amount of liability included in recorded value of the company's commitment	$ 6.4
Expiration of commitment range	2013 to 2022

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Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating Activities
Net income	$ 137.3	$ 110.8	$ 80.8
Adjustments to reconcile income to net cash provided by operating activities:
Gains on sales of assets	(61.4)	(70.1)	(43.5)
Depreciation	249.4	238.5	228.1
Asset impairment charges	5.0	6.8	8.3
Deferred income taxes	24.4	22.7	1.4
Share of affiliates’ earnings, net of dividends	15.5	(3.2)	8.1
Change in income taxes payable	(9.4)	9.1	(7.3)
Change in accrued operating lease expense	(11.0)	(7.6)	(13.1)
Employee benefit plans	0.8	(5.3)	(21.6)
Other	19.6	5.1	2.5
Net cash provided by operating activities	370.2	306.8	243.7
Investing Activities
Additions to operating assets and facilities	(739.3)	(466.4)	(520.2)
Loans extended	(1.0)	(31.9)	0
Investments in affiliates	(29.7)	(116.2)	(64.7)
Other	0	(0.1)	(0.2)
Portfolio investments and capital additions	(770.0)	(614.6)	(585.1)
Purchases of leased-in assets	(1.3)	(61.1)	(5.3)
Portfolio proceeds	288.9	154.1	84.3
Proceeds from sales of other assets	28.4	42.2	30.4
Proceeds from sale-leasebacks	104.9	0	79.0
Net decrease (increase) in restricted cash	5.5	21.4	(23.4)
Other	0	0	2.4
Net cash used in investing activities	(343.6)	(458.0)	(417.7)
Financing Activities
Net proceeds from issuances of debt (original maturities longer than 90 days)	445.2	790.3	573.8
Repayments of debt (original maturities longer than 90 days)	(671.2)	(312.8)	(344.2)
Net increase (decrease) in debt with original maturities of 90 days or less	243.3	(85.0)	46.8
Payments on capital lease obligations	(3.0)	(18.5)	(12.8)
Dividends	(58.8)	(56.0)	(53.5)
Other	4.6	5.2	0.9
Net cash (used in) provided by financing activities	(39.9)	323.2	211.0
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(0.9)	(2.1)	(0.2)
Net (decrease) increase in Cash and Cash Equivalents during the period	(14.2)	169.9	36.8
Cash and Cash Equivalents at beginning of period	248.4	78.5	41.7
Cash and Cash Equivalents at end of period	$ 234.2	$ 248.4	$ 78.5

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Pension and Other Post-Retirement Benefits (Details 5) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Effect on the other post-retirement benefit cost and obligation
Effect on total of service and interest cost, one percentage point increase	$ 0.1
Effect on total of service and interest cost, one percentage point decrease	(0.1)
Effect on post-retirement benefit obligation, one percentage point increase	2.5
Effect on post-retirement benefit obligation, one percentage point decrease	$ (2.2)

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Supplemental Cash Flow and Noncash Investing Transactions

12 Months Ended

Dec. 31, 2012

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow and Noncash Investing Transaction

Supplemental Cash Flow and Noncash Investing Transaction

	2012		2011			2010
Supplemental Cash Flow Information (in millions)
Interest paid *	$	162.3	$	152.7		$	152.6
Income taxes paid (refunded), net	11.1		(2.8		)	13.0

________

(*) Interest paid consisted of interest on debt obligations, interest rate swaps (net of interest received) and capital lease interest. Interest expense capitalized as part of the cost of construction of major assets was immaterial for all periods presented.

Noncash Investing Transaction (in millions)	2011
Operating assets received *	$	88.8

________

(*) In connection with the dissolutions of GATX's Clipper Fourth Limited and Clipper Fourth APS affiliates, GATX received liquidating distributions of six vessels with an aggregate fair value of $88.8 million. See Note 6 for additional information.

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Leases (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Leveraged Leases [Abstract]
Total minimum lease payments receivable, Leveraged Leases	$ 0	$ 617.0
Principal and interest on third-party nonrecourse debt, Leveraged Leases		(518.6)
Net minimum future lease receivable, Leveraged Leases	0	98.4
Estimated non-guaranteed residual value of leased assets, Leveraged Leases	0	20.9
Unearned income, Leveraged Leases	0	(31.8)
Finance leases, Leveraged Leases	0	87.5
Allowance for losses, Leveraged Leases	0	(9.0)
Deferred taxes, Leveraged Leases	0	(62.7)
Net investment in finance leases, Leveraged Leases	0	15.8
Direct Financing [Abstract]
Total minimum lease payments receivable, Direct Financing	327.3	341.4
Principal and interest on third-party nonrecourse debt, Direct Financing	0	0
Net minimum future lease receivable, Direct Financing	327.3	341.4
Estimated non-guaranteed residual value of leased assets, Direct Financing	86.9	93.7
Unearned income, Direct Financing	(168.5)	(187.7)
Finance leases, Direct Financing	245.7	247.4
Allowance for losses, Direct Financing	0	0
Deferred taxes, Direct Financing	0	0
Net investment in finance leases, Direct Financing	245.7	247.4
Finance Leases [Abstract]
Total minimum lease payments receivable, Total Finance Leases	327.3	958.4
Principal and interest on third-party nonrecourse debt, Total Finance Leases	0	(518.6)
Net minimum future lease receivable, Total Finance Leases	327.3	439.8
Estimated non-guaranteed residual value of leased assets, Total Finance Leases	86.9	114.6
Unearned income, Total Finance Leases	(168.5)	(219.5)
Finance leases total financing leases	245.7	334.9
Allowance for losses, Total Finance Leases	0	(9.0)
Deferred taxes, Total Finance Leases	0	(62.7)
Net investment in finance leases, Total Finance Leases	$ 245.7	$ 263.2

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Fair Value Disclosure (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2012 Instrument	Dec. 31, 2011 Instrument
Fair Value Disclosure (Textual) [Abstract]
Aggregate fair value of all derivative instruments with Net liability position	$ 3,400,000
Fair Value Hedging [Member]
Fair Value Disclosure (Textual) [Abstract]
Number of instruments, outstanding	1	3
Aggregate notional amount of outstanding Fair value hedge derivative instruments	100,000,000	350,000,000
Maturity date range of hedge derivatives	2015
Cash Flow Hedges [Member]
Fair Value Disclosure (Textual) [Abstract]
Number of instruments, outstanding	12	11
Maturity date range of hedge derivatives	2013-2019
Aggregate notional amount of outstanding Cash flow hedge derivative instruments	129,200,000	73,400,000
Cash Flow Hedge Pre Tax Gain Loss to be Reclassified within Twelve Months	6,800,000
Expected After tax reclassification of net losses from accumulated other comprehensive income to earnings in Next Twelve Months	$ (4,300,000)

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Commercial Commitments (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Guarantor Obligations [Line Items]
Total commercial commitments	$ 104.5	[1]	$ 134.0	[1]
Guarantee of Indebtedness of Others [Member]
Guarantor Obligations [Line Items]
Total commercial commitments	42.0		42.0
Asset residual value guarantees [Member]
Guarantor Obligations [Line Items]
Total commercial commitments	11.2		33.9
Lease payment guarantees [Member]
Guarantor Obligations [Line Items]
Total commercial commitments	41.0		47.0
Performance bonds [Member]
Guarantor Obligations [Line Items]
Total commercial commitments	0.6		1.3
Standby letters of credit [Member]
Guarantor Obligations [Line Items]
Total commercial commitments	$ 9.7		$ 9.8

[1] At December 31, 2012, the carrying value of liabilities on the balance sheet for commercial commitments was $6.4 million. The expirations of these commitments range from 2013 to 2022. GATX is not aware of any event that would require it to satisfy any of these commitments.

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Investments in Affiliated Companies (Summarized Financial Data-RRPF) (Details 7) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Income Statement [Abstract]
Lease revenue	$ 651.8		$ 645.5		$ 636.2
Net income	75.3		88.5		55.8
Assets [Abstract]
Current assets	311.0		404.4
Operating assets, net of accumulated depreciation of $651.8 for 2012 and $568.1 for 2011	4,781.3		4,724.4
Total assets	5,092.3		5,128.8
Liabilities and Equity [Abstract]
Current liabilities	439.7		570.7
Long-term debt	3,739.6		3,671.9
Shareholders’ equity	913.0		886.2
Total liabilities and shareholders' equity	5,092.3		5,128.8
RRPF Joint Ventures [Member]
Income Statement [Abstract]
Depreciation expense	(115.1)		(100.1)		(89.1)
Interest expense	(64.8)		(55.5)		(54.5)
Other expenses	(16.3)		(11.5)		(9.1)
Gains on sales of assets	35.9		19.4		3.4
Income before income taxes	93.0		76.5		63.7
Income taxes	(3.8)	[1]	(3.6)	[1]	(11.6)	[1]
Net income	89.2		72.9		52.1
Assets [Abstract]
Current assets	84.8		104.5
Operating assets, net of accumulated depreciation of $651.8 for 2012 and $568.1 for 2011	2,572.2	[2]	2,335.5	[2]
Accumulated depreciation	651.8		568.1
Total assets	2,671.1		2,455.0
Liabilities and Equity [Abstract]
Current liabilities	122.8		141.6
Long-term debt	1,955.1		1,796.6
Other liabilities	217.7		201.1
Shareholders’ equity	375.5		315.7
Total liabilities and shareholders' equity	2,671.1		2,455.0
RRPF Joint Ventures [Member] | Third Parties [Member]
Income Statement [Abstract]
Lease revenue	140.4		127.9		118.2
RRPF Joint Ventures [Member] | Rolls-Royce [Member]
Income Statement [Abstract]
Lease revenue	$ 112.9		$ 96.3		$ 94.8

[1] Represents income taxes directly attributable to the RRPF Affiliates. Several of the RRPF Affiliates are flow through entities and income taxes are incurred at the shareholder level.

[2] All operating assets were pledged as collateral for long term debt obligations.

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Foreign Operations

12 Months Ended

Dec. 31, 2012

Concentration Risks, Types, No Concentration Percentage [Abstract]

Foreign Operations

Foreign Operations

Revenues are determined to be foreign or domestic based upon location of the customer. Assets are determined based on ownership of the assets. The Company did not derive revenues in excess of 10% of consolidated revenues from any one foreign country for the years ended December 31, 2012, 2011 and 2010. At December 31, 2012, 8% and 7% of the Company’s identifiable assets were in Canada and Germany, respectively. At December 31, 2011, 9% and 8% of the Company’s identifiable assets were in Germany and Canada, respectively. At December 31, 2010, 10% of the Company’s identifiable assets were in Canada and Germany.

The table below presents certain GATX data for the years ending or as of December 31 (in millions):

	2012		2011		2010
Revenues
Foreign	$	279.8	$	278.6	$	270.7
United States	963.4		912.8		843.3
	$	1,243.2	$	1,191.4	$	1,114.0
Identifiable Assets
Foreign	$	1,897.9	$	1,766.6	$	1,806.8
United States	4,157.5		4,090.9		3,635.6
	$	6,055.4	$	5,857.5	$	5,442.4

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Foreign Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended									12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Canada [Member]	Dec. 31, 2011 Canada [Member]	Dec. 31, 2009 Canada [Member]	Dec. 31, 2012 Germany [Member]	Dec. 31, 2011 Germany [Member]	Dec. 31, 2010 Germany [Member]	Dec. 31, 2012 Foreign [Member]	Dec. 31, 2011 Foreign [Member]	Dec. 31, 2010 Foreign [Member]	Dec. 31, 2012 United States [Member]	Dec. 31, 2011 United States [Member]	Dec. 31, 2010 United States [Member]
Foreign operations data
Revenues	$ 331.7	$ 331.9	$ 323.1	$ 256.5	$ 330.0	$ 315.2	$ 296.8	$ 249.4	$ 1,243.2	$ 1,191.4	$ 1,114.0							$ 279.8	$ 278.6	$ 270.7	$ 963.4	$ 912.8	$ 843.3
Identifiable assets	$ 6,055.4				$ 5,857.5				$ 6,055.4	$ 5,857.5	$ 5,442.4							$ 1,897.9	$ 1,766.6	$ 1,806.8	$ 4,157.5	$ 4,090.9	$ 3,635.6
Foreign Operations (Textual) [Abstract]
Maximum percentage of consolidated revenues derive from any individual foreign country																		10.00%	10.00%	10.00%
Percentage of company's identifiable assets												8.00%	8.00%	10.00%	7.00%	9.00%	10.00%

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Variable Interest Entities (Details 1) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Carrying amounts and maximum exposure to loss with respect to VIEs
Net Carrying Amount	$ 111.4	$ 151.6
Maximum Exposure to Loss	111.4	151.6
Investments in Affiliates [Member]
Carrying amounts and maximum exposure to loss with respect to VIEs
Net Carrying Amount	110.7	72.2
Maximum Exposure to Loss	110.7	72.2
Leveraged leases [Member]
Carrying amounts and maximum exposure to loss with respect to VIEs
Net Carrying Amount	0	78.5
Maximum Exposure to Loss	0	78.5
Other investment [Member]
Carrying amounts and maximum exposure to loss with respect to VIEs
Net Carrying Amount	0.7	0.9
Maximum Exposure to Loss	$ 0.7	$ 0.9

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Debt (Tables)

12 Months Ended

Dec. 31, 2012

Debt Disclosure [Abstract]

Commercial Paper and Borrowings Under Bank Credit Facilities

Commercial Paper and Borrowings Under Bank Credit Facilities ($ in millions)

	December 31
	2012			2011
Balance	$	273.6		$	28.6
Weighted average interest rate	0.72		%	1.26		%

Outstanding balances of debt obligations and the applicable interest rates

Outstanding balances of GATX’s debt obligations and the applicable interest rates as of December 31 ($ in millions):

	Date of Issue	Final Maturity	Interest Rate		2012		2011
Recourse Fixed Rate Debt
Unsecured	04/30/09	05/15/14	8.75	%	$	300.0	$	300.0
Unsecured	02/05/10	05/15/15	4.75	%	250.0		250.0
Unsecured	11/19/10	07/15/16	3.50	%	250.0		250.0
Unsecured	05/27/11	06/01/21	4.85	%	250.0		250.0
Unsecured	06/11/12	06/15/22	4.75	%	250.0		—
Unsecured	02/06/08	02/15/18	6.00	%	200.0		200.0
Unsecured	03/03/06	03/01/16	5.80	%	200.0		200.0
Secured	11/06/08	11/15/13	9.00	%	159.9		168.3
Unsecured	12/22/05	12/22/15	5.75	%	100.0		115.0
Unsecured	09/20/11	07/15/16	3.50	%	100.0		100.0
Unsecured	04/14/05	04/15/15	5.70	%	100.0		100.0
Unsecured	09/20/11	06/01/21	4.85	%	50.0		50.0
Unsecured	12/27/10	10/31/18	3.84	%	21.1		20.7
Unsecured	11/29/10	11/30/18	3.70	%	19.8		20.7
Unsecured	09/24/09	10/01/12	4.75	%	—		300.0
Unsecured	10/11/06	02/15/12	5.50	%	—		200.0
Unsecured	03/29/06	12/11/12	3.49	%	—		40.5
Unsecured	12/18/07	11/30/12	4.70	%	—		27.2
Unsecured	06/29/07	05/31/12	4.25	%	—		22.7
Unsecured	02/11/02	07/31/12	5.73	%	—		0.6
Unsecured	02/11/02	01/31/12	5.83	%	—		0.2
Total recourse fixed rate debt					$	2,250.8	$	2,615.9
Recourse Floating Rate Debt *
Unsecured	12/12/11	06/12/17	2.25	%	$	107.5	$	115.0
Unsecured	03/18/08	03/18/14	1.25	%	100.0		150.0
Unsecured	05/17/11	05/17/13	1.50	%	100.0		100.0
Unsecured	12/21/12	12/21/17	1.88	%	100.0		—
Secured	12/19/11	12/19/20	2.10	%	95.5		100.0
Unsecured	06/30/06	06/28/13	0.90	%	70.0		100.0
Unsecured	08/31/12	12/31/19	2.47	%	66.0		—
Unsecured	12/15/10	10/31/15	1.58	%	42.9		49.9
Unsecured	03/29/06	09/30/16	2.09	%	41.2		—
Secured	05/14/09	05/14/14	2.86	%	38.0		41.4
Unsecured	01/12/12	06/12/17	2.25	%	35.0		—
Unsecured	12/18/07	10/31/16	2.01	%	27.7		—
Unsecured	12/06/11	08/31/16	1.56	%	25.8		29.8
Unsecured	06/29/07	09/30/16	2.17	%	18.4		—
Unsecured	09/02/11	11/30/16	1.24	%	13.4		15.6
Unsecured	03/01/10	02/28/15	1.97	%	13.2		13.0
Unsecured	12/31/03	09/30/13	1.73	%	1.8		4.3
Unsecured	12/27/10	06/30/12	2.84	%	—		5.2
Unsecured	11/29/10	12/31/12	2.20	%	—		1.9

	Date of Issue	Final Maturity	Interest Rate		2012			2011
Unsecured	12/15/03	12/15/12	1.63	%	—			1.2
Unsecured	12/31/03	12/31/12	1.53	%	—			0.3
Total recourse floating rate debt					$	896.4		$	727.6
Nonrecourse Fixed Rate Debt
Secured	09/30/97	09/20/16	6.69	%	$	35.1		$	45.2
Secured	06/13/06	12/31/13	6.26	%	21.4			22.2
Secured	08/01/07	06/30/17	6.77	%	2.5			2.5
Secured	06/16/06	04/29/16	6.80	%	1.3			1.3
Secured	08/01/07	07/31/17	6.78	%	0.8			0.8
Secured	05/29/07	05/31/12	5.84	%	—			3.5
Secured	06/01/07	05/31/12	6.27	%	—			2.4
Secured	05/11/07	05/31/12	6.06	%	—			1.4
Total nonrecourse fixed rate debt					$	61.1		$	79.3
Nonrecourse Floating Rate Debt *
Secured	Various	05/08/14	1.46	%	$	49.3		$	51.0
Secured	Various	01/15/15	1.46	%	23.5			24.4
Total nonrecourse floating rate debt					$	72.8		$	75.4
Total debt principal					$	3,281.1		$	3,498.2
Debt discount, net					(8.3		)	(9.3		)
Debt adjustment for fair value hedges					10.2			15.3
Total Debt					$	3,283.0		$	3,504.2

_________

(*) Floating rates as of December 31, 2012.

Maturities of GATX's debt obligation

Maturities of GATX’s debt obligations as of December 31, 2012, were as follows (in millions):

	Debt Principal
2013	$	485.7
2014	513.6
2015	552.5
2016	626.9
2017	236.2
Thereafter	866.2
Total debt principal	$	3,281.1

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Commercial Commitments

12 Months Ended

Dec. 31, 2011

Guarantees [Abstract]

Commercial Commitments

Commercial Commitments

In connection with certain investments or transactions, GATX has entered into various commercial commitments, such as guarantees and standby letters of credit, which could potentially require performance in the event of demands by third parties. Similar to GATX’s balance sheet investments, these guarantees expose GATX to credit, market and equipment risk; accordingly, GATX evaluates its commitments and other contingent obligations using techniques similar to those used to evaluate funded transactions.

The following table shows GATX’s commercial commitments as of December 31 (in millions):

	2012		2011
Affiliate guarantees	$	42.0	$	42.0
Asset residual value guarantees	11.2		33.9
Lease payment guarantees	41.0		47.0
Performance bonds	0.6		1.3
Standby letters of credit	9.7		9.8
Total commercial commitments *	$	104.5	$	134.0

__________________

(*) At December 31, 2012, the carrying value of liabilities on the balance sheet for commercial commitments was $6.4 million. The expirations of these commitments range from 2013 to 2022. GATX is not aware of any event that would require it to satisfy any of these commitments.

Affiliate guarantees generally involve guaranteeing repayment of the financing utilized to acquire assets and are in lieu of making direct equity investments in the affiliate. Affiliate guarantees exclude an affiliate guarantee for which no stated maximum potential future payment is provided and for which the likelihood of performance under the guarantee is considered remote. GATX is not aware of any event that would require it to satisfy these guarantees and expects the affiliates to generate sufficient cash flow to satisfy their financing obligations.

Asset residual value guarantees represent GATX’s commitment to third parties that an asset or group of assets will be worth a specified amount at the end of a lease term. GATX earns an initial fee for providing these asset value guarantees, which is amortized into income over the guarantee period. Upon disposition of the assets, GATX receives a share of any proceeds in excess of the amount guaranteed and such residual sharing gains are recorded in net gain on asset dispositions. If, at the end of the lease term, the net realizable value of the asset is less than the guaranteed amount, any liability resulting from GATX’s performance pursuant to these guarantees will be reduced by the value realized from disposition of the asset.

Lease payment guarantees represent GATX’s guarantee of third-party lease payments to financial institutions. Any liability resulting from GATX’s performance pursuant to these guarantees will be reduced by the value realized from the underlying asset or group of assets.

GATX and its subsidiaries are also parties to standing letters of credit and performance bonds primarily related to workers’ compensation and general liability insurance coverages. No material claims have been made against these obligations and as of December 31, 2012, GATX does not expect any material losses to result from these obligations as performance is not anticipated to be required.

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Income Taxes (Details 1) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income before income taxes
Domestic	$ 80.5	$ 39.5	$ 5.1
Foreign	63.3	68.1	54.2
Income before Income Taxes and Share of Affiliates’ Earnings	$ 143.8	$ 107.6	$ 59.3