10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

__________________________________________ 

FORM 10-Q

__________________________________________  

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2015

or

¨ 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, Illinois 60606-5314
(Address of principal executive offices, including zip code)
(312) 621-6200
(Registrant's telephone number, including area code)

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  x    No  ¨

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  x    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company (as defined in Rule 12b-2 of the Exchange Act).

x	Large accelerated filer	¨	Accelerated filer
¨	Non-accelerated filer	¨	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  ¨    No  x

As of June 30, 2015, 43.2 million common shares were outstanding.

GATX CORPORATION

FORM 10-Q

QUARTERLY REPORT FOR THE PERIOD ENDED JUNE 30, 2015

INDEX

Item No.		Page No.
Part I – FINANCIAL INFORMATION
	Forward-Looking Statements	1
Item 1.	Financial Statements
	Consolidated Balance Sheets (Unaudited)	2
	Consolidated Statements of Comprehensive Income (Unaudited)	3
	Consolidated Statements of Cash Flows (Unaudited)	4
	Notes to the Consolidated Financial Statements (Unaudited)	5
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations
	Business Overview	20
	Discussion of Operating Results	20
	Segment Operations	21
	Cash Flow and Liquidity	34
	Critical Accounting Policies	37
	Non-GAAP Financial Measures	38
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	40
Item 4.	Controls and Procedures	40
Part II – OTHER INFORMATION
Item 1.	Legal Proceedings	41
Item 1A.	Risk Factors	41
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	41
Item 6.	Exhibits	41
SIGNATURE		42
EXHIBIT INDEX		43

FORWARD-LOOKING STATEMENTS

Forward looking statements in this report that are not historical facts are "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. These include statements that reflect our current views with respect to, among other things, future events, financial performance and market conditions. In some cases, you can identify forward-looking statements by the use of words such as “may,” “could,” “expect,” “intend,” “plan,” “seek,” “anticipate,” “believe,” “estimate,” “predict,” “potential,” “continue,” “likely,” “will,” “would” and variations of these terms and similar expressions, or the negative of these terms or similar expressions.

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 our Annual Report on Form 10-K for the year ended December 31, 2014, and in our other filings with the Securities and Exchange Commission. Specific risks and uncertainties include, but are not limited to, (1) changes in regulatory requirements for tank cars carrying crude, ethanol, and other flammable liquids, (2) competitive factors in our primary markets, (3) weak economic conditions, financial market volatility, and other factors that may decrease demand for our assets and services, (4) inability to maintain our assets on lease at satisfactory rates, (5) changes to, or failure to comply with, laws, rules, and regulations applicable to our assets and operations, (6) operational disruption and increased costs associated with compliance maintenance programs and other maintenance initiatives, (7) financial and operational risks associated with long-term railcar purchase commitments, (8) deterioration of conditions in the capital markets, reductions in our credit ratings, or increases in our financing costs, (9) events having an adverse impact on assets, customers, or regions where we have a large investment, (10) decreased demand for certain railcars used in the petroleum industry due to sustained low crude oil prices, (11) risks related to international operations and expansion into new geographic markets, (12) inadequate allowances to cover credit losses in our portfolio, (13) asset impairment charges we may be required to recognize, (14) environmental remediation costs or a negative outcome in pending or threatened litigation, (15) inability to obtain cost-effective insurance, (16) fluctuations in foreign exchange rates, (17) operational and financial risks related to our affiliate investments, (18) reduced opportunities to generate asset remarketing income, (19) failure to successfully negotiate collective bargaining agreements with the unions representing a substantial portion of our employees and (20) other risks discussed in our filings with the US Securities and Exchange Commission ("SEC"), including our Form 10-K for the year ended December 31, 2014, all of which are available on the SEC's website (www.sec.gov). You should not place undue reliance on forward-looking statements, which speak only as of the date they are made and are not guarantees of future performance. The Company undertakes no obligation to publicly update or revise any forward-looking statements.

1

PART I - FINANCIAL INFORMATION

Item 1. Financial Statements

GATX CORPORATION AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS (UNAUDITED)

(In millions, except share data)

	June 30			December 31
	2015			2014
Assets
Cash and Cash Equivalents	$	58.6		$	209.9
Restricted Cash	13.3			14.5
Receivables
Rent and other receivables	76.3			86.0
Loans	12.5			97.3
Finance leases	177.9			174.7
Less: allowance for losses	(6.0		)	(5.7		)
	260.7			352.3
Operating Assets and Facilities ($123.0 and $123.1 related to a consolidated VIE)	8,341.3			8,143.5
Less: allowance for depreciation ($37.4 and $35.0 related to a consolidated VIE)	(2,506.9		)	(2,455.5		)
	5,834.4			5,688.0
Investments in Affiliated Companies	368.7			357.7
Goodwill	81.2			86.1
Other Assets	243.1			229.0
Total Assets	$	6,860.0		$	6,937.5
Liabilities and Shareholders’ Equity
Accounts Payable and Accrued Expenses	$	171.3		$	165.9
Debt
Commercial paper and borrowings under bank credit facilities	3.8			72.1
Recourse	4,208.1			4,179.9
Nonrecourse ($11.5 and $15.9 related to a consolidated VIE)	11.5			15.9
Capital lease obligations	5.0			6.3
	4,228.4			4,274.2
Deferred Income Taxes	974.5			937.3
Other Liabilities	200.4			246.1
Total Liabilities	5,574.6			5,623.5
Shareholders’ Equity
Common stock, $0.625 par value: Authorized shares — 120,000,000 Issued shares — 66,727,318 and 66,600,984 Outstanding shares — 43,218,915 and 44,198,850	41.5			41.4
Additional paid in capital	673.8			672.8
Retained earnings	1,574.9			1,501.7
Accumulated other comprehensive loss	(183.3		)	(148.4		)
Treasury stock at cost (23,508,403 and 22,402,134 shares)	(821.5		)	(753.5		)
Total Shareholders’ Equity	1,285.4			1,314.0
Total Liabilities and Shareholders’ Equity	$	6,860.0		$	6,937.5

See accompanying notes to consolidated financial statements.

2

GATX CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED)

(In millions, except per share data)

	Three Months Ended June 30						Six Months Ended June 30
	2015			2014			2015			2014
Revenues
Lease revenue	$	280.6		$	274.3		$	558.9		$	524.9
Marine operating revenue	66.0			72.2			90.2			89.9
Other revenue	18.7			19.3			35.9			37.6
Total Revenues	365.3			365.8			685.0			652.4
Expenses
Maintenance expense	80.2			84.0			158.5			157.1
Marine operating expense	47.3			54.6			66.2			69.6
Depreciation expense	74.4			71.1			142.9			129.8
Operating lease expense	22.4			27.3			43.1			54.2
Other operating expense	7.8			6.7			15.1			13.3
Selling, general and administrative expense	44.6			44.9			90.3			87.6
Total Expenses	276.7			288.6			516.1			511.6
Other Income (Expense)
Net gain on asset dispositions	8.7			28.2			54.0			56.3
Interest expense, net	(38.5		)	(39.5		)	(79.4		)	(81.5		)
Other expense	(1.6		)	(4.9		)	(5.6		)	(8.3		)
Income before Income Taxes and Share of Affiliates’ Earnings	57.2			61.0			137.9			107.3
Income Taxes	(20.8		)	(20.2		)	(47.8		)	(34.3		)
Share of Affiliates’ Earnings, Net of Taxes	9.0			12.3			17.5			22.2
Net Income	$	45.4		$	53.1		$	107.6		$	95.2
Other Comprehensive Income, Net of Taxes
Foreign currency translation adjustments	11.5			(1.9		)	(36.5		)	(1.2		)
Unrealized (loss) gain on securities	(0.1		)	0.1			(0.1		)	(0.1		)
Unrealized gain (loss) on derivative instruments	0.1			0.8			(2.5		)	1.5
Post-retirement benefit plans	2.1			1.7			4.2			3.1
Other comprehensive income (loss)	13.6			0.7			(34.9		)	3.3
Comprehensive Income	$	59.0		$	53.8		$	72.7		$	98.5
Share Data
Basic earnings per share	$	1.04		$	1.17		$	2.46		$	2.08
Average number of common shares	43.5			45.5			43.8			45.7
Diluted earnings per share	$	1.03		$	1.15		$	2.42		$	2.05
Average number of common shares and common share equivalents	44.2			46.3			44.5			46.5
Dividends declared per common share	$	0.38		$	0.33		$	0.76		$	0.66

See accompanying notes to consolidated financial statements.

3

GATX CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)

(In millions)

	Six Months Ended June 30
	2015			2014
Operating Activities
Net income	$	107.6		$	95.2
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation expense	149.1			136.5
Gains on sales of assets	(50.7		)	(50.0		)
Deferred income taxes	40.0			27.8
Share of affiliates’ earnings, net of dividends	(17.3		)	(2.5		)
Change in accrued operating lease expense	(33.2		)	(22.0		)
Other	(4.0		)	(16.9		)
Net cash provided by operating activities	191.5			168.1
Investing Activities
Portfolio investments and capital additions	(356.2		)	(655.1		)
Purchases of leased-in assets	(99.5		)	(150.5		)
Portfolio proceeds	211.5			137.8
Proceeds from sales of other assets	12.9			16.3
Net decrease in restricted cash	1.2			7.2
Other	9.7			—
Net cash used in investing activities	(220.4		)	(644.3		)
Financing Activities
Net proceeds from issuances of debt (original maturities longer than 90 days)	689.0			876.6
Repayments of debt (original maturities longer than 90 days)	(645.2		)	(665.8		)
Net (decrease) increase in debt with original maturities of 90 days or less	(68.1		)	117.1
Stock repurchases	(64.1		)	(88.5		)
Dividends	(35.2		)	(32.2		)
Other	5.1			(1.5		)
Net cash (used in) provided by financing activities	(118.5		)	205.7
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(3.9		)	1.1
Net decrease in Cash and Cash Equivalents	(151.3		)	(269.4		)
Cash and Cash Equivalents, beginning of period	209.9			379.7
Cash and Cash Equivalents, end of period	$	58.6		$	110.3
Noncash Investing Transactions
Distributions from affiliates (1)	$	—		$	1.1

_________

(1) In 2014, we received distributions of 62 railcars from our Southern Capital affiliate.

See accompanying notes to consolidated financial statements.

4

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

NOTE 1. Description of Business

As used herein, "GATX," "we," "us," "our," and similar terms refer to GATX Corporation and its subsidiaries, unless indicated otherwise.

We lease, operate, manage, and remarket long-lived, widely-used assets, primarily in the rail and marine markets. We also invest in joint ventures that complement our existing business activities. We report our financial results through fourprimary business segments: Rail North America, Rail International, American Steamship Company (“ASC”), and Portfolio Management.

NOTE 2. Basis of Presentation

We prepared the accompanying unaudited consolidated financial statements in accordance with US Generally Accepted Accounting Principles ("GAAP") for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, our unaudited consolidated financial statements do not include all of the information and footnotes required for complete financial statements. We have included all of the normal recurring adjustments that we deemed necessary for a fair presentation.

Operating results for the six months endedJune 30, 2015, are not necessarily indicative of the results we may achieve for the entire year ending December 31, 2015. In particular, ASC's fleet is inactive for a significant portion of the first quarter of each year due to winter conditions on the Great Lakes. In addition, asset remarketing income does not occur evenly throughout the year. For more information, refer to the consolidated financial statements and footnotes in our Annual Report on Form 10-K for the year ended December 31, 2014.

Accounting Changes

Discontinued Operations

In April 2014, the Financial Accounting Standards Board ("FASB") issued amendments to authoritative guidance for reporting discontinued operations and disposals of components of an entity. The amendments require that disposals representing strategic shifts that have (or will have) a major effect on an entity’s operations or financial results should be reported as discontinued operations. The amendments also expand the disclosure requirements for both discontinued operations and significant dispositions that do not qualify as discontinued operations.

The amendments were effective for us beginning in the first quarter of 2015. Adoption of the new guidance did not impact the amount or timing of net income or the presentation and disclosures of our financial statements.

New Accounting Pronouncements

Debt Issue Costs

In April 2015, the FASB issued authoritative guidance that requires presentation of debt issue costs as a deduction from the carrying amount of the related debt liability on the balance sheet, rather than as a deferred charge. The new guidance is effective for us beginning in the first quarter of 2016, with early adoption permitted. Adoption of the new guidance is not expected to impact the amount or timing of net income but may result in changes to the presentation and disclosures of our financial statements.

Consolidation

In February 2015, the FASB issued authoritative guidance amending the analysis required to determine whether to consolidate certain types of legal entities such as limited partnerships, limited liability corporations, and certain securitization structures. The new guidance is effective for us beginning in the first quarter of 2016, with early adoption permitted. We are currently evaluating the effect, if any, the new guidance will have on our financial statements and related disclosures.

5

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) (Continued)

Revenue from Contracts with Customers

In May 2014, the FASB issued authoritative accounting guidance that supersedes most current revenue recognition guidance, including industry-specific guidance. The new guidance requires companies to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration it expects to be entitled to in exchange for those goods or services.

In July 2015, the FASB deferred the effective date of this standard from the first quarter of 2017 to the first quarter of 2018. Early adoption is permitted as of the original effective date. We can adopt the new guidance using either the retrospective method or the cumulative effect transition method. We are still evaluating the effect that the new guidance will have on our consolidated financial statements and related disclosures, including which transition method we will use and when we will choose to adopt this standard.

NOTE 3. Variable Interest Entities

We are the primary beneficiary of one of our variable interest entities, a structured lease financing of a portfolio of railcars, because we have the power to direct its significant activities. As a result, we consolidate this variable interest entity. The risks associated with it are similar to those of our wholly owned railcar leasing activities.

The following table shows the carrying amounts of assets and liabilities of the consolidated variable interest entity (in millions):

	June 30 2015		December 31 2014
Operating assets, net of accumulated depreciation (1)	$	85.6	$	88.1
Nonrecourse debt	11.5		15.9

_________

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

We determined that we are not the primary beneficiary of our other variable interest entities, which are primarily investments in equipment leasing affiliates that were financed through a variety of equity investments and third party lending arrangements. We are not the primary beneficiary of these variable interest entities because we do not have the power to direct the activities that most significantly impact the entities’ economic performance. For investments in affiliates we determined were variable interest entities, we concluded that power was shared by the affiliate partners based on the terms of the relevant joint venture agreements, which require approval of all partners for significant decisions regarding the variable interest entity.

The following table shows the carrying amounts and maximum exposure to loss for our unconsolidated variable interest entities (in millions):

	June 30, 2015				December 31, 2014
	Net Carrying Amount		Maximum Exposure to Loss		Net Carrying Amount		Maximum Exposure to Loss
Investments in affiliates	$	153.4	$	153.4	$	143.9	$	143.9
Other investment	0.3		0.3		0.4		0.4
Total	$	153.7	$	153.7	$	144.3	$	144.3

6

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) (Continued)

NOTE 4. Fair Value Disclosure

The following tables show our assets and liabilities that are measured at fair value on a recurring basis (in millions):

Assets	June 30, 2015		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs    (Level 3)
Interest rate derivatives (1)	$	1.6	$	—	$	1.6	$	—
Foreign exchange rate derivatives (1)	7.8		—		7.8		—
Foreign exchange rate derivatives (2)	1.6		—		1.6		—
Available-for-sale equity securities	4.2		4.2		—		—
Liabilities
Foreign exchange rate derivatives (1)	4.2		—		4.2		—
Foreign exchange rate derivatives (2)	2.5		—		2.5		—

Assets	December 31, 2014		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Interest rate derivatives (1)	$	1.8	$	—	$	1.8	$	—
Foreign exchange rate derivatives (2)	9.7		—		9.7		—
Available-for-sale equity securities	4.4		4.4		—		—
Liabilities
Interest rate derivatives (1)	5.9		—		5.9		—
Foreign exchange rate derivatives (2)	1.6		—		1.6		—

_________

(1) Designated as hedges.

(2) Not designated as hedges.

We base our valuations of available-for-sale equity securities on their quoted prices on an active exchange. We value derivatives using a pricing model with inputs (such as yield curves and foreign currency rates) that are observable in the market or that can be derived principally from observable market data.

Derivative instruments

Fair Value Hedges

We use interest rate swaps to manage the fixed-to-floating rate mix of our debt obligations by converting the fixed rate debt to floating rate debt. For fair value hedges, we recognize changes in fair value of both the derivative and the hedged item as interest expense. We had eight instruments outstanding with an aggregate notional amount of $550.0 million as of June 30, 2015 that mature from 2017 to 2020, and eight instruments outstanding with an aggregate notional amount of $600.0 million as of December 31, 2014 that mature from 2015 to 2020.

7

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) (Continued)

Cash Flow Hedges

We use interest rate swaps to convert floating rate debt to fixed rate debt. We use Treasury rate locks to hedge our exposure to interest rate risk on anticipated transactions. We also use currency swaps to hedge our exposure to fluctuations in the exchange rates of the foreign currencies in which we conduct business. We had seven instruments outstanding with an aggregate notional amount of $346.2 million as of June 30, 2015, and seven instruments outstanding with an aggregate notional amount of $281.5 million as of December 31, 2014. These derivatives had maturities ranging from 2015 to 2022. Within the next 12 months, we expect to reclassify $5.7 million ($3.6 million after-tax) of net losses on previously terminated derivatives from accumulated other comprehensive loss. We reclassify these amounts when interest and operating lease expense on the related hedged transactions affect earnings.

Non-designated Derivatives

We do not hold derivative financial instruments for purposes other than hedging, although certain of our derivatives are not designated as accounting hedges. We recognize changes in the fair value of these derivatives in other (income) expense immediately.

Some of our derivative instruments contain credit risk provisions that could require us to make immediate payment on net liability positions in the event that we default on certain outstanding debt obligations. The aggregate fair value of our derivative instruments with credit risk related contingent features that are in a liability position as of June 30, 2015, was $4.2 million. We are not required to post any collateral on our derivative instruments and do not expect the credit risk provisions to be triggered.

In the event that a counterparty fails to meet the terms of an interest rate swap agreement or a foreign exchange contract, our exposure is limited to the fair value of the swap, if in our favor. We manage the credit risk of counterparties by transacting with institutions that we consider financially sound and by avoiding concentrations of risk with a single counterparty. We believe that the risk of non-performance by any of our counterparties is remote.

The following table shows the impacts of our derivative instruments on our statements of comprehensive income (in millions):

		Three Months Ended June 30						Six Months Ended June 30
Derivative Designation	Location of Loss (Gain) Recognized	2015			2014			2015			2014
Fair value hedges (1)	Interest expense	$	1.4		$	(0.5	)	$	(0.9	)	$	1.6
Cash flow hedges	Other comprehensive (income) loss (effective portion)	10.9			1.4			2.5			3.2
Cash flow hedges	Interest expense (effective portion reclassified from accumulated other comprehensive loss)	1.4			1.2			2.7			2.4
Cash flow hedges	Operating lease expense (effective portion reclassified from accumulated other comprehensive loss)	0.1			0.3			0.2			0.5
Cash flow hedges (2)	Other (income) expense (effective portion reclassified from accumulated other comprehensive loss)	12.6			—			4.2			2.2
Non-designated (3)	Other (income) expense	(1.6		)	0.9			(5.8		)	1.0

_________

(1) The fair value adjustments related to the underlying debt equally offset the amounts recognized in interest expense.

(2) For 2015, includes $12.6 million and $2.7 million of losses for the three and six months ended June 30, 2015 on foreign currency derivatives which are substantially offset by gains from foreign currency remeasurement adjustments, also recognized in Other (income) expense.

(3) For 2015, includes $5.1 million of gains on foreign currency derivatives which are substantially offset by losses from foreign currency remeasurement adjustments on the AAE loan, also recognized in Other (income) expense.

8

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) (Continued)

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. We base the fair values of investment funds, which are accounted for under the cost method, on the best information available, which may include quoted investment fund values. We estimate the fair values of loans and fixed and floating rate debt using discounted cash flow analyses based on interest rates currently offered for loans with similar terms to borrowers of similar credit quality. The estimated fair values for these investments are classified in Level 2 of the fair value hierarchy because they are based on directly or indirectly observable inputs.

The following table shows the carrying amounts and fair values of our other financial instruments as of (in millions):

	June 30, 2015				December 31, 2014
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets
Investment funds	$	0.8	$	1.8	$	1.5	$	2.4
Loans	12.5		12.6		97.3		97.4
Liabilities
Recourse fixed rate debt	$	3,990.8	$	4,022.0	$	3,639.9	$	3,775.0
Recourse floating rate debt	217.3		216.5		540.0		540.0
Nonrecourse debt	11.5		11.9		15.9		16.6

9

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) (Continued)

NOTE 5. Pension and Other Post-Retirement Benefits

The following table shows components of our pension and other post-retirement benefits expense for the three months ended June 30, 2015 and 2014 (in millions):

	2015 Pension Benefits			2014 Pension Benefits			2015 Retiree Health and Life			2014 Retiree Health and Life
Service cost	$	2.0		$	1.6		$	0.1		$	0.1
Interest cost	5.0			5.3			0.3			0.4
Expected return on plan assets	(6.4		)	(7.1		)	—			—
Amortization of (1):
Unrecognized prior service credit	(0.3		)	(0.3		)	(0.1		)	(0.1		)
Unrecognized net actuarial loss (gain)	3.9			3.1			—			(0.1		)
Net expense	$	4.2		$	2.6		$	0.3		$	0.3

The following table shows components of our pension and other post-retirement benefits expense for the six months endedJune 30, 2015 and 2014 (in millions):

	2015 Pension Benefits			2014 Pension Benefits			2015 Retiree Health and Life			2014 Retiree Health and Life
Service cost	$	3.7		$	3.0		$	0.1		$	0.1
Interest cost	9.9			10.4			0.7			0.8
Expected return on plan assets	(12.9		)	(14.3		)	—			—
Amortization of (1):
Unrecognized prior service credit	(0.5		)	(0.5		)	(0.1		)	(0.1		)
Unrecognized net actuarial loss (gain)	7.4			5.7			—			(0.1		)
Net expense	$	7.6		$	4.3		$	0.7		$	0.7

_________

(1) Amounts reclassified from accumulated other comprehensive loss.

10

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) (Continued)

NOTE 6. Share-Based Compensation

During the six months ended of 2015, we granted 341,800 stock appreciation rights (“SARs”), 65,850 restricted stock units, 61,740 performance shares, and 5,617 phantom stock units. For the three and six months ended June 30, 2015, total share-based compensation expense was $3.2 million and $6.1 million and the related tax benefits were $1.2 million and $2.3 million. For the three and six months ended June 30, 2014, total share-based compensation expense was $3.1 million and $6.2 million and the related tax benefits were $1.2 million and $2.3 million.

The estimated fair value of our 2015 SARs awards and related underlying assumptions are shown in the table below.

	2015
Estimated fair value	$	18.16
Quarterly dividend rate	$	0.38
Expected term of stock appreciation rights, in years	4.7
Risk-free interest rate	1.2		%
Dividend yield	2.6		%
Expected stock price volatility	29.2		%
Present value of dividends	$	6.90

NOTE 7. Income Taxes

Our effective tax rate was 35% for the six months endedJune 30, 2015, compared to 32% for the six months endedJune 30, 2014. The difference in the effective rates for the prior year, compared to the statutory rate of 35%, is primarily attributable to the mix of pretax income among domestic and foreign jurisdictions which are taxed at different rates. The current year reflects a higher contribution from domestic source income, which is taxed at a higher rate, as well as the impact of an increase in the statutory tax rate in Alberta, Canada.

As of June 30, 2015, our gross liability for unrecognized tax benefits was $5.6 million. If fully recognized, these tax benefits would decrease our income tax expense by $5.6 million ($3.6 million, net of federal tax). We do not anticipate the recognition of any tax benefits that were previously unrecognized within the next 12 months.

11

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) (Continued)

NOTE 8. Commercial Commitments

We have entered into various commercial commitments, such as guarantees and standby letters of credit, related to certain transactions. These commercial commitments require us to fulfill specific obligations in the event of third party demands. Similar to our balance sheet investments, these commitments expose us to credit, market, and equipment risk. Accordingly, we evaluate these commitments and other contingent obligations using techniques similar to those we use to evaluate funded transactions.

The following table shows our commercial commitments (in millions):

	June 30 2015		December 31 2014
Lease payment guarantees	$	25.4	$	28.5
Standby letters of credit	8.6		8.7
Performance bonds	0.4		0.4
Total commercial commitments (1)	$	34.4	$	37.6

_________

(1) The carrying value of liabilities on the balance sheet for commercial commitments was $4.6 million at June 30, 2015 and $5.1 million at December 31, 2014. The expirations of these commitments range from 2017 to 2023. We are not aware of any event that would require us to satisfy any of our commitments.

Lease payment guarantees are commitments to financial institutions to make lease payments for a third party in the event they default. We reduce any liability that may result from these guarantees by the value of the underlying asset or group of assets.

We are also parties to standby letters of credit and performance bonds, which primarily relate to contractual obligations and general liability insurance coverages. No material claims have been made against these obligations, and no material losses are anticipated.

NOTE 9. Earnings per Share

We compute basic earnings per share by dividing net income available to our common shareholders by the weighted average number of shares of our common stock outstanding. We appropriately weighted shares issued or reacquired during the period that they were outstanding. Our diluted earnings per share reflect the impacts of our potentially dilutive securities and our equity compensation awards.

In the first quarter of 2014, our board of directors authorized a $250 million share repurchase program. During the first six months of 2015, 1.2 million shares were acquired for $68.0 million. As of June 30, 2015, a total of 3.1 million shares had been repurchased for $192.5 million, and $57.5 million was available under the repurchase authorization.

The following table shows the computation of our basic and diluted net income per common share (in millions, except per share amounts):

	Three Months Ended June 30				Six Months Ended June 30
	2015		2014		2015		2014
Numerator:
Net income	$	45.4	$	53.1	$	107.6	$	95.2
Denominator:
Weighted average shares outstanding - basic	43.5		45.5		43.8		45.7
Effect of dilutive securities:
Equity compensation plans	0.7		0.8		0.7		0.8
Weighted average shares outstanding - diluted	44.2		46.3		44.5		46.5
Basic earnings per share	$	1.04	$	1.17	$	2.46	$	2.08
Diluted earnings per share	$	1.03	$	1.15	$	2.42	$	2.05

12

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) (Continued)

NOTE 10. Accumulated Other Comprehensive Loss

The following table shows the change in components for accumulated other comprehensive loss (in millions):

	Foreign Currency Translation Gain (Loss)			Unrealized Gain (Loss) on Securities			Unrealized Gain (Loss) on Derivative Instruments			Post-Retirement Benefit Plans			Total
Balance at December 31, 2014	$	(21.9	)	$	0.3		$	(19.1	)	$	(107.7	)	$	(148.4	)
Change in component	(48.0		)	—			6.0			—			(42.0		)
Reclassification adjustments into earnings	—			—			(7.0		)	3.3			(3.7		)
Income tax effect	—			—			(1.6		)	(1.2		)	(2.8		)
Balance at March 31, 2015	$	(69.9	)	$	0.3		$	(21.7	)	$	(105.6	)	$	(196.9	)
Change in component	11.5			(0.2		)	(13.3		)	—			(2.0		)
Reclassification adjustments into earnings	—			—			14.1			3.5			17.6
Income tax effect	—			0.1			(0.7		)	(1.4		)	(2.0		)
Balance at June 30, 2015	$	(58.4	)	$	0.2		$	(21.6	)	$	(103.5	)	$	(183.3	)

________

See "Note 4. Fair Value Disclosure" and "Note 5. Pension and Other Post-Retirement Benefits" for impacts of the reclassification adjustments on the statement of comprehensive income.

NOTE 11. 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 our 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. For a full discussion of our pending legal matters, please refer to "Note 23. Legal Proceedings and Other Contingencies" of our consolidated financial statements in our Annual Report on Form 10-K for the year ended December 31, 2014.

Viareggio Derailment

In June 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, in the province of Lucca, 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 December 14, 2012, the Public Prosecutors of Lucca ("Public Prosecutors") formally charged GATX Rail Austria and two of its subsidiaries (collectively, "GRA"), as well as ten maintenance and supervisory employees (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 charges were brought against four Italian Railway companies and eighteen of their employees, among others. The Public Prosecutors assert that the axle on a tank car broke, causing the derailment and resulting in a tank rupture and release of LPG, after the car hit an obstacle placed on the side of the track by the Italian Railway. The Public Prosecutors further allege that a crack in the axle 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 trial in the Court of Lucca (the “Lucca Trial”) commenced on November 13, 2013.

13

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) (Continued)

With respect to civil claims, GRA’s insurers continue to work cooperatively with the insurer for the Italian Railway to adjust and settle personal injury and property damage claims. These joint settlement efforts have so far settled most of the significant civil claims related to the accident; however, approximately 90 civil claimants did not settle and are currently parties to the Lucca Trial. The Court of Lucca will determine both the civil and criminal liability of the defendants in the one proceeding. GRA expects that its insurers will cover any civil damages if awarded to the claimants in the Lucca trial. The Public Prosecutors and civil claimants have finished presenting their cases in the Lucca Trial. GRA, the Italian Railway, and the other defendants in the Lucca Trial will begin presenting the defense of their cases on September 16, 2015.

Since May 2012, one of the excess insurers providing coverage, Liberty Mutual Insurance Europe Limited (“Liberty”), has settled civil claims but has refused to reimburse GRA for its ongoing legal defense fees and costs, taking a position contrary to our other insurers in the prior underlying layers who had provided coverage for such expenses. As of June 30, 2015, GRA had incurred approximately $9.6 million in unreimbursed defense fees and costs, and GRA continues to incur costs in connection with the Lucca Trial. Consequently, in October 2013, GRA filed an arbitration proceeding against Liberty seeking to recoup its unreimbursed defense fees and costs (the “Liberty Arbitration”), which is set for hearing in November 2015. GRA is also negotiating issues of reimbursement for outstanding defense costs with the three other insurers in the current coverage layer, which includes a 25% share held by Liberty. GRA cannot predict the outcome of the Liberty Arbitration or the amount of defense fees and costs that ultimately may not be reimbursed by Liberty or the other excess insurers in the current coverage layer.

GRA believes that it and its Employees acted diligently and properly, but we cannot predict the outcome of the Lucca Trial or what other legal proceedings or claims, if any, may be initiated against GRA or its personnel, and, therefore, cannot reasonably estimate the possible amount or range of loss that may ultimately be incurred in connection with this accident. Accordingly, we have not established any accruals with respect to this matter.

14

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) (Continued)

NOTE 12. Financial Data of Business Segments

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

We lease, operate, manage, and remarket long-lived, widely-used assets, primarily in the rail and marine markets. We also invest in joint ventures that complement our existing business activities. We report our financial results through fourprimary business segments: Rail North America, Rail International, ASC, and Portfolio Management.

Rail North America comprises our wholly owned operations in the United States, Canada, and Mexico, as well as an affiliate investment. 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 comprises our wholly owned European operations ("GATX Rail Europe" or "GRE"), a railcar leasing business in India ("GATX India Pte. Ltd." or "GIPL"), and a recently established railcar leasing business in Russia ("GATX Rail Vostok LLC" or "GRV"), as well as one development stage affiliate in China. GRE leases railcars 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 US-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 generates leasing, marine operating, asset remarketing and management fee income through a collection of diversified wholly owned assets and joint venture 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, pretax 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.

We allocate debt balances and related interest expense to each segment based upon a predetermined fixed recourse leverage level expressed as a ratio of recourse debt (including off-balance-sheet debt) to equity. The leverage levels are 5:1 for Rail North America, 2:1 for Rail International, 1.5:1 for ASC, and 3:1 for Portfolio Management. We believe that by using this leverage and interest expense allocation methodology, each operating segment’s financial performance reflects appropriate risk-adjusted borrowing costs.

15

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) (Continued)

The following tables show certain segment data for each of our business segments (in millions):

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
Three Months Ended June 30, 2015
Profitability
Revenues
Lease revenue	$	230.9		$	42.4		$	1.0		$	6.3		$	—		$	280.6
Marine operating revenue	—			—			51.0			15.0			—			66.0
Other revenue	16.8			1.7			—			0.2			—			18.7
Total Revenues	247.7			44.1			52.0			21.5			—			365.3
Expenses
Maintenance expense	63.8			9.4			7.0			—			—			80.2
Marine operating expense	—			—			34.1			13.2			—			47.3
Depreciation expense	53.3			10.8			4.9			5.4			—			74.4
Operating lease expense	20.7			0.1			1.7			—			(0.1		)	22.4
Other operating expense	5.8			1.5			—			0.5			—			7.8
Total Expenses	143.6			21.8			47.7			19.1			(0.1		)	232.1
Other Income (Expense)
Net gain on asset dispositions	6.1			1.1			—			1.5			—			8.7
Interest expense, net	(24.6		)	(3.0		)	(1.3		)	(5.6		)	(4.0		)	(38.5		)
Other (expense) income	(0.8		)	(1.2		)	(0.1		)	—			0.5			(1.6		)
Share of affiliates' earnings (pretax)	0.1			(0.1		)	—			12.0			—			12.0
Segment Profit (Loss)	$	84.9		$	19.1		$	2.9		$	10.3		$	(3.4	)	113.8
Selling, general and administrative expense																44.6
Income taxes (including $3.0 related to affiliates' earnings)																23.8
Net Income																$	45.4
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	$	5.0		$	—		$	—		$	0.1		$	—		$	5.1
Residual sharing income	0.2			—			—			1.4			—			1.6
Non-remarketing disposition gains (1)	0.9			1.1			—			—			—			2.0
Asset impairment	—			—			—			—			—			—
	$	6.1		$	1.1		$	—		$	1.5		$	—		$	8.7
Capital Expenditures
Portfolio investments and capital additions	$	135.2		$	27.8		$	10.2		$	0.3		$	1.8		$	175.3
Selected Balance Sheet Data at June 30, 2015
Investments in affiliated companies	$	13.4		$	1.6		$	—		$	353.7		$	—		$	368.7
Identifiable assets	$	4,560.4		$	1,104.9		$	307.8		$	796.5		$	90.4		$	6,860.0

_____

(1) Includes scrapping gains.

16

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) (Continued)

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
Three Months Ended June 30, 2014
Profitability
Revenues
Lease revenue	$	218.2		$	47.7		$	1.0		$	7.4		$	—		$	274.3
Marine operating revenue	—			—			59.4			12.8			—			72.2
Other revenue	16.1			2.4			—			0.8			—			19.3
Total Revenues	234.3			50.1			60.4			21.0			—			365.8
Expenses
Maintenance expense	65.1			11.6			7.3			—			—			84.0
Marine operating expense	—			—			42.3			12.3			—			54.6
Depreciation expense	49.1			11.8			4.4			5.8			—			71.1
Operating lease expense	25.7			—			1.7			—			(0.1		)	27.3
Other operating expense	5.2			1.0			—			0.5			—			6.7
Total Expenses	145.1			24.4			55.7			18.6			(0.1		)	243.7
Other Income (Expense)
Net gain on asset dispositions	23.9			2.6			—			1.7			—			28.2
Interest expense, net	(25.3		)	(6.2		)	(1.4		)	(6.1		)	(0.5		)	(39.5		)
Other expense	(0.3		)	(2.7		)	(0.2		)	—			(1.7		)	(4.9		)
Share of affiliates' earnings (pretax)	4.2			—			—			13.5			—			17.7
Segment Profit (Loss)	$	91.7		$	19.4		$	3.1		$	11.5		$	(2.1	)	123.6
Selling, general and administrative expense																44.9
Income taxes (including $5.4 related to affiliates' earnings)																25.6
Net Income																$	53.1
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	$	17.7		$	0.6		$	—		$	0.5		$	—		$	18.8
Residual sharing income	3.8			—			—			1.2			—			5.0
Non-remarketing disposition gains (1)	2.4			2.0			—			—			—			4.4
Asset impairment	—			—			—			—			—			—
	$	23.9		$	2.6		$	—		$	1.7		$	—		$	28.2
Capital Expenditures
Portfolio investments and capital additions	$	145.8		$	42.3		$	7.7		$	12.0		$	1.8		$	209.6
Selected Balance Sheet Data at December 31, 2014
Investments in affiliated companies	$	17.2		$	1.8		$	—		$	338.7		$	—		$	357.7
Identifiable assets	$	4,358.3		$	1,229.4		$	286.7		$	813.3		$	249.8		$	6,937.5

_____

(1) Includes scrapping gains.

17

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) (Continued)

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
Six Months Ended June 30, 2015
Profitability
Revenues
Lease revenue	$	459.4		$	84.5		$	2.0		$	13.0		$	—		$	558.9
Marine operating revenue	—			—			58.0			32.2			—			90.2
Other revenue	31.5			3.6			—			0.8			—			35.9
Total Revenues	490.9			88.1			60.0			46.0			—			685.0
Expenses
Maintenance expense	133.0			18.3			7.2			—			—			158.5
Marine operating expense	—			—			41.0			25.2			—			66.2
Depreciation expense	105.6			21.5			4.9			10.9			—			142.9
Operating lease expense	41.4			0.1			1.7			—			(0.1		)	43.1
Other operating expense	11.3			2.4			—			1.4			—			15.1
Total Expenses	291.3			42.3			54.8			37.5			(0.1		)	425.8
Other Income (Expense)
Net gain on asset dispositions	42.9			6.0			—			5.1			—			54.0
Interest expense, net	(49.1		)	(9.5		)	(2.6		)	(10.8		)	(7.4		)	(79.4		)
Other expense	(3.0		)	(1.2		)	(0.1		)	—			(1.3		)	(5.6		)
Share of affiliates' earnings (pretax)	0.3			(0.2		)	—			23.4			—			23.5
Segment Profit (Loss)	$	190.7		$	40.9		$	2.5		$	26.2		$	(8.6	)	251.7
Selling, general and administrative expense																90.3
Income taxes (including $6.0 related to affiliates' earnings)																53.8
Net Income																$	107.6
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	$	40.9		$	—		$	—		$	2.1		$	—		$	43.0
Residual sharing income	0.4			—			—			3.0			—			3.4
Non-remarketing disposition gains (1)	1.6			6.1			—			—			—			7.7
Asset impairment	—			(0.1		)	—			—			—			(0.1		)
	$	42.9		$	6.0		$	—		$	5.1		$	—		$	54.0
Capital Expenditures
Portfolio investments and capital additions	$	265.0		$	69.2		$	19.5		$	0.3		$	2.2		$	356.2

_____

(1) Includes scrapping gains.

18

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) (Continued)

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
Six Months Ended June 30, 2014
Profitability
Revenues
Lease revenue	$	413.1		$	94.9		$	2.1		$	14.8		$	—		$	524.9
Marine operating revenue	—			—			62.5			27.4			—			89.9
Other revenue	30.7			4.4			—			2.5			—			37.6
Total Revenues	443.8			99.3			64.6			44.7			—			652.4
Expenses
Maintenance expense	126.5			23.1			7.5			—			—			157.1
Marine operating expense	—			—			45.7			23.9			—			69.6
Depreciation expense	90.6			23.5			4.4			11.3			—			129.8
Operating lease expense	52.6			—			1.7			—			(0.1		)	54.2
Other operating expense	10.0			2.4			—			0.9			—			13.3
Total Expenses	279.7			49.0			59.3			36.1			(0.1		)	424.0
Other Income (Expense)
Net gain on asset dispositions	48.7			5.0			(0.4		)	3.0			—			56.3
Interest expense, net	(49.9		)	(12.4		)	(2.8		)	(12.9		)	(3.5		)	(81.5		)
Other (expense) income	(3.7		)	(2.7		)	(0.2		)	0.3			(2.0		)	(8.3		)
Share of affiliates' earnings (pretax)	7.5			(0.1		)	—			24.4			—			31.8
Segment Profit (Loss)	$	166.7		$	40.1		$	1.9		$	23.4		$	(5.4	)	226.7
Selling, general and administrative expense																87.6
Income taxes (including $9.6 related to affiliates' earnings)																43.9
Net Income																$	95.2
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	$	39.3		$	0.6		$	—		$	0.5		$	—		$	40.4
Residual sharing income	4.4			—			—			2.4			—			6.8
Non-remarketing disposition gains (1)	5.0			4.4			—			—			—			9.4
Asset impairment	—			—			(0.4		)	0.1			—			(0.3		)
	$	48.7		$	5.0		$	(0.4	)	$	3.0		$	—		$	56.3
Capital Expenditures
Portfolio investments and capital additions	$	541.8		$	81.6		$	16.0		$	12.0		$	3.7		$	655.1

_____

(1) Includes scrapping gains.

19

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

BUSINESS OVERVIEW

We lease, operate, manage, and remarket long-lived, widely-used assets, primarily in the rail and marine markets. We also invest in joint ventures that complement our existing business activities. We report our financial results through fourprimary business segments: Rail North America, Rail International, American Steamship Company (“ASC”), and Portfolio Management.

The following discussion and analysis should be read in conjunction with the MD&A in our Annual Report on Form 10-K for the year ended December 31, 2014. We based the discussion and analysis that follows on financial data we derived from the financial statements prepared in accordance with GAAP and on certain other financial data that we 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. In prior periods, we reported net income excluding certain items that we believe are not necessarily reflective of our ongoing business activities. No such adjustments occurred in the first six months of 2015 or 2014, however, certain of these adjustments occurred in 2013 and impacted the computation of return on equity for the trailing twelve months earnings as disclosed in this report.

Operating results for the three and six months ended June 30, 2015 are not necessarily indicative of the results we may achieve for the entire year ending December 31, 2015. For more information about our business, refer to our Annual Report on Form 10-K for the year ended December 31, 2014.

DISCUSSION OF OPERATING RESULTS

The following table shows a summary of our reporting segments and consolidated financial results for the three and six months ended June 30 (in millions, except per share data and percentages):

	Three Months Ended June 30					Six Months Ended June 30
	2015			2014		2015		2014
Segment Revenues
Rail North America	$	247.7		$	234.3	$	490.9	$	443.8
Rail International	44.1			50.1		88.1		99.3
ASC	52.0			60.4		60.0		64.6
Portfolio Management	21.5			21.0		46.0		44.7
	$	365.3		$	365.8	$	685.0	$	652.4
Segment Profit
Rail North America	$	84.9		$	91.7	$	190.7	$	166.7
Rail International	19.1			19.4		40.9		40.1
ASC	2.9			3.1		2.5		1.9
Portfolio Management	10.3			11.5		26.2		23.4
	117.2			125.7		260.3		232.1
Less:
Selling, general and administrative expense	44.6			44.9		90.3		87.6
Unallocated interest expense, net	4.0			0.5		7.4		3.5
Other, including eliminations	(0.6		)	1.6		1.2		1.9
Income taxes ($3.0 and $5.4 QTR and $6.0 and $9.6 YTD related to affiliates' earnings)	23.8			25.6		53.8		43.9
Net Income	$	45.4		$	53.1	$	107.6	$	95.2
Diluted earnings per share	$	1.03		$	1.15	$	2.42	$	2.05
Investment Volume	$	175.3		$	209.6	$	356.2	$	655.1

20

The following table shows our return on equity ("ROE") for the trailing twelve months ended June 30:

	2015		2014
ROE	16.3	%	15.6	%
ROE, excluding tax adjustments and other items	16.3	%	15.4	%

Net income was $107.6 million, or $2.42 per diluted share, for the first six months of 2015 compared to $95.2 million, or $2.05 per diluted share, in 2014. Net income increased $12.4 million compared to the prior year, driven by a positive income contribution from the acquisition of boxcars discussed in more detail in the "Rail North America" section of the MD&A, higher lease rates and lower operating lease expense, partially offset by higher depreciation expense and lower share of affiliates' earnings.

Net income was $45.4 million, or $1.03 per diluted share, for the second quarter of 2015 compared to $53.1 million, or $1.15 per diluted share, in 2014. Net income decreased $7.7 million compared to the prior year largely due to lower asset remarketing income and share of affiliates' earnings, partially offset by lower maintenance and operating lease expense.

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, pretax 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.

We allocate debt balances and related interest expense to each segment based upon a predetermined fixed recourse leverage level expressed as a ratio of recourse debt (including off-balance-sheet debt) to equity. The leverage levels are 5:1 for Rail North America, 2:1 for Rail International, 1.5:1 for ASC, and 3:1 for Portfolio Management. We believe that by using this leverage and interest expense allocation methodology, each operating segment’s financial performance reflects appropriate risk-adjusted borrowing costs.

RAIL NORTH AMERICA

Segment Summary

At the end of the first quarter of 2014, we acquired a fleet of more than 18,500 boxcars for approximately $340 million (the "Boxcar Fleet"). At June 30, 2015, Rail North America's wholly owned fleet consisted of approximately 125,600 cars, including approximately 18,700 boxcars. Fleet utilization, excluding boxcars, was 99.3% at the end of the second quarter of 2015 compared to 99.3% at the end of the prior quarter and 98.6% at June 30, 2014. Fleet utilization for boxcars was 97.3% at the end of the second quarter of 2015, compared to 92.8% at the end of the prior quarter and 90.7% at June 30, 2014 as we continued to successfully lease idle cars from the Boxcar Fleet and scrap older boxcars.

During the second quarter of 2015, the Lease Price Index on renewals (the “LPI,” see definition below) increased 36.3%, compared to an increase of 43.2% in the prior quarter and 36.0% in the second quarter of 2014. Lease terms on renewals for cars in the LPI averaged 54 months in the current quarter, compared to 59 months in the prior quarter and 67 months in the second quarter of 2014. While renewal terms for many car types remained longer than historical averages, specific weakness in coal, coupled with regulatory uncertainty impacting cars in flammable service, resulted in shorter lease terms for these car types. During the second quarter of 2015, an average of approximately 106,200 railcars, excluding boxcars, were on lease, compared to 106,500 in the prior quarter and 105,400 in the second quarter of 2014.

The effects of the recently enacted flammable tank car regulatory changes on the industry will take some time to fully develop. However, we are well positioned to address these changes as fewer than 1,400 tank cars require modification or retirement before 2023.

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For the remainder of 2015, we expect the LPI renewal rate change to be in the mid-30% range; however, the uncertain pricing environment for some car types may create volatility in the LPI measure. As of June 30, 2015, leases for approximately 8,800 railcars in our term lease fleet and approximately 3,500 boxcars have expired or are scheduled to expire prior to the end of the year. These amounts exclude railcars on leases that were scheduled to expire in the second half of 2015 but have already been renewed or assigned to a new lessee.

The following table shows Rail North America's segment results (in millions):

	Three Months Ended June 30						Six Months Ended June 30
	2015			2014			2015			2014
Revenues
Lease revenue	$	230.9		$	218.2		$	459.4		$	413.1
Other revenue	16.8			16.1			31.5			30.7
Total Revenues	247.7			234.3			490.9			443.8
Expenses
Maintenance expense	63.8			65.1			133.0			126.5
Depreciation expense	53.3			49.1			105.6			90.6
Operating lease expense	20.7			25.7			41.4			52.6
Other operating expense	5.8			5.2			11.3			10.0
Total Expenses	143.6			145.1			291.3			279.7
Other Income (Expense)
Net gain on asset dispositions	6.1			23.9			42.9			48.7
Interest expense, net	(24.6		)	(25.3		)	(49.1		)	(49.9		)
Other expense	(0.8		)	(0.3		)	(3.0		)	(3.7		)
Share of affiliates' earnings (pretax)	0.1			4.2			0.3			7.5
Segment Profit	$	84.9		$	91.7		$	190.7		$	166.7
Investment Volume	$	135.2		$	145.8		$	265.0		$	541.8

The following table shows the components of Rail North America's lease revenue (in millions):

	Three Months Ended June 30				Six Months Ended June 30
	2015		2014		2015		2014
Railcars (excluding boxcars)	$	201.0	$	189.6	$	399.4	$	375.0
Boxcars	20.6		20.0		41.7		21.3
Locomotives	9.3		8.6		18.3		16.8
	$	230.9	$	218.2	$	459.4	$	413.1

Lease Price Index

Our LPI is an internally-generated business indicator that measures lease rate pricing on renewals for our North American railcar fleet, excluding boxcars. We calculate the index using the weighted average lease rate for a group of railcar types that we believe best represents our overall North American fleet, excluding boxcars. The average renewal lease rate change is reported as the percentage change between the average renewal lease rate and the average expiring lease rate, weighted by fleet composition. The average renewal lease term is reported in months and reflects the average renewal lease term of railcar types in the LPI, weighted by fleet composition.

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Rail North America Fleet Data

The following table shows fleet activity for Rail North America's railcars, excluding boxcars:

	June 30 2014		September 30 2014		December 31 2014		March 31 2015		June 30 2015
Beginning balance	106,804		106,894		107,387		107,343		106,949
Cars added	1,174		958		835		1,013		823
Cars scrapped	(387	)	(440	)	(202	)	(261	)	(347	)
Cars sold	(697	)	(25	)	(677	)	(1,146	)	(441	)
Ending balance	106,894		107,387		107,343		106,949		106,984
Utilization rate at quarter end	98.6	%	98.8	%	99.2	%	99.3	%	99.3	%
Average active railcars	105,366		105,755		106,569		106,541		106,211

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The following table shows fleet activity for Rail North America's boxcars:

	June 30 2014		September 30 2014		December 31 2014		March 31 2015		June 30 2015
Ending balance	19,254		19,146		19,021		18,912		18,651
Utilization	90.7	%	91.3	%	92.7	%	92.8	%	97.3	%

The following table shows fleet activity for Rail North America's locomotives:

	June 30 2014		September 30 2014		December 31 2014		March 31 2015		June 30 2015
Beginning balance	600		602		603		603		608
Locomotives added	9		1		7		7		—
Locomotives scrapped or sold	(7	)	—		(7	)	(2	)	—
Ending balance	602		603		603		608		608
Utilization rate at quarter end	99.2	%	97.7	%	99.3	%	98.8	%	96.1	%
Average active locomotives	594		591		592		599		593

Comparison of the First Six Months of 2015 to the First Six Months of 2014

Segment Profit

Segment profit was $190.7 million, compared to $166.7 million in the prior year. The increase was driven by a positive contribution from the Boxcar Fleet, higher lease rates and lower operating lease expense, partially offset by higher depreciation expense and maintenance expense as well as lower share of affiliates' earnings.

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Revenues

Lease revenue increased $46.3 million in 2015, primarily due to higher lease rates across the non-boxcar fleet and additional revenue from the Boxcar Fleet. Other revenue increased $0.8 million, primarily due to higher excess mileage and equalization revenue.

Expenses

Maintenance expense increased $6.5 million in 2015, primarily due to additional costs attributable to the Boxcar Fleet, partially offset by higher capitalized repairs and fewer wheelset replacements. Depreciation expense increased $15.0 million, largely due to depreciation on new investments, including the Boxcar Fleet. Operating lease expense decreased $11.2 million, resulting from the purchase of railcars previously on operating leases in each year. Other operating expense increased $1.3 million, primarily due to higher storage and switching costs.

Other Income (Expense)

Net gain on asset dispositions decreased $5.8 million in 2015, driven by lower scrapping gains in the current year and the absence of a residual sharing fee received in the prior year, partially offset by higher gains on sales of cars sold. Net interest expense decreased $0.8 million, primarily due to the impact of lower average interest rates. Other expense decreased $0.7 million, primarily due to lower termination costs associated with the early buyouts of operating leases, which occurred in each period. Share of affiliates' earnings decreased $7.2 million, primarily due to gains on dispositions of railcars at our Southern Capital affiliate in the prior year.

Investment Volume

During 2015, investment volume was $265.0 million compared to $541.8 million in 2014. We acquired 1,631 newly built railcars and purchased 200 railcars in the secondary market in the first half of 2015, compared to 1,154 newly built railcars and 384 railcars purchased in the secondary market in 2014. Additionally, investments in 2014 included the purchase of the Boxcar Fleet of approximately 18,500 boxcars.

Comparison of the Second Quarter of 2015 to the Second Quarter of 2014

Segment Profit

Segment profit was $84.9 million, compared to $91.7 million in the prior year. The decrease was driven by lower asset remarketing income and share of affiliates' earnings as well as higher depreciation expense, partially offset by higher lease revenue.

Revenues

Lease revenue increased $12.7 million, primarily due to higher lease rates across the non-boxcar fleet. Other revenue increased $0.7 million, largely due to higher excess mileage revenue.

Expenses

Maintenance expense decreased $1.3 million, driven by higher capitalized repairs and fewer wheelset replacements, partially offset by additional costs attributable to the Boxcar Fleet. Depreciation expense increased $4.2 million, largely due to depreciation on new investments. Operating lease expense decreased $5.0 million, resulting from the purchase of railcars previously on operating leases. Other operating expense increased $0.6 million, primarily due to higher storage and switching costs.

Other Income (Expense)

Net gain on asset dispositions decreased $17.8 million in 2015, primarily due to a lower number of cars sold in the current year, lower scrapping gains and the absence of a residual sharing fee received in the prior year. Net interest expense decreased $0.7 million due to the impact of lower average interest rates. Other expense increased $0.5 million, primarily due to a paint rebate received in the prior year. Share of affiliates' earnings decreased $4.1 million, primarily due to gains on dispositions of railcars at our Southern Capital affiliate in the prior year.

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North American Rail Regulatory Matters

On May 1, 2015 the Pipeline and Hazardous Materials Safety Administration of the US Department of Transportation (“PHMSA”) issued a Final Rule (the “US Rule”) intended to improve the safety of trains that transport large volumes of flammable liquids, primarily crude oil and ethanol. In addition to rail operating requirements and standards for the classification of mined gases and liquids, the US Rule establishes new design standards for tank cars operating in “high hazard flammable trains” (“HHFT”), which are trains that include 20 or more consecutive cars carrying flammable liquids or more than 34 cars carrying flammable liquids in a train. The US Rule requires newly built tank cars for use in HHFT service to comply with the new standards beginning on October 1, 2015. The US Rule establishes standards for modifications to existing tank cars in HHFT service. Existing tank cars in HHFT service would have to be modified or removed from that service between January, 2018, and May, 2025, depending on the type of car and the type of commodity carried. The US Rule was published in the Federal Register on May 8, 2015, and the rule became effective on July 7, 2015. Several legal challenges to the US Rule have been filed in the United States Circuit Court for the District of Columbia, and several petitions for reconsideration have been filed with PHMSA. We cannot predict the timing or the outcome of these challenges.

On May 1, 2015 Transport Canada (“TC”) issued a Final Rule (the “Canada Rule”) intended to improve the safety of trains that transport flammable liquids, primarily crude and ethanol. The Canada Rule establishes new design standards for tank cars carrying flammable liquids. The Canada Rule requires newly built tank cars for use in flammable liquids to comply with the new standards beginning on October 1, 2015. The Canada Rule establishes standards for modifications to existing tank cars. Existing tank cars would have to be modified or removed from flammable liquids service between May, 2017, and May, 2025, depending on the type of car and the type of commodity carried. The Rule was published in the Canada Gazette on May 20, 2015, and took effect that day. The Canada Rule is not subject to legal or administrative challenges.

We have a fleet of approximately 126,000 railcars in North America, including approximately 14,000 tank cars currently used to transport flammable liquids, of which approximately 4,600 are moving crude oil and ethanol. Approximately 90% of our tank cars requiring modification have a deadline of 2023 or later. We have not yet determined the number of cars that will be modified, repurposed or retired.

RAIL INTERNATIONAL

Segment Summary

Rail International's performance has been stable despite the ongoing, unsettled European economy, and we continue to pursue investment opportunities. Railcar utilization for our wholly owned European operations ("GATX Rail Europe" or "GRE") was 95.5% at the end of the second quarter of 2015 compared to 95.9% at the end of the prior quarter and 95.6% at June 30, 2014.

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The following table shows Rail International's segment results (in millions):

	Three Months Ended June 30						Six Months Ended June 30
	2015			2014			2015			2014
Revenues
Lease revenue	$	42.4		$	47.7		$	84.5		$	94.9
Other revenue	1.7			2.4			3.6			4.4
Total Revenues	44.1			50.1			88.1			99.3
Expenses
Maintenance expense	9.4			11.6			18.3			23.1
Depreciation expense	10.8			11.8			21.5			23.5
Operating lease expense	0.1			—			0.1			—
Other operating expense	1.5			1.0			2.4			2.4
Total Expenses	21.8			24.4			42.3			49.0
Other Income (Expense)
Net gain on asset dispositions	1.1			2.6			6.0			5.0
Interest expense, net	(3.0		)	(6.2		)	(9.5		)	(12.4		)
Other expense	(1.2		)	(2.7		)	(1.2		)	(2.7		)
Share of affiliates' earnings (pretax)	(0.1		)	—			(0.2		)	(0.1		)
Segment Profit	$	19.1		$	19.4		$	40.9		$	40.1
Investment Volume	$	27.8		$	42.3		$	69.2		$	81.6

The following table shows fleet activity for GRE railcars:

	June 30 2014		September 30 2014		December 31 2014		March 31 2015		June 30 2015
Beginning balance	21,591		21,684		21,960		22,451		22,497
Cars added	409		481		657		249		301
Cars scrapped or sold	(316	)	(205	)	(166	)	(203	)	(315	)
Ending balance	21,684		21,960		22,451		22,497		22,483
Utilization rate at quarter end	95.6	%	95.1	%	95.9	%	95.9	%	95.5	%
Average active railcars	20,706		20,833		21,111		21,479		21,427

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Comparison of the First Six Months of 2015 to the First Six Months of 2014

Foreign Currency

Rail International's results of operations are impacted by fluctuations in the exchange rates of the foreign currencies in which it conducts business, primarily the euro. In the first six months of 2015, a weaker euro negatively impacted lease revenue by approximately $17.5 million and segment profit, excluding other income (expense), by approximately $9.2 million compared to the first six months of 2014.

Segment Profit

Segment profit was $40.9 million, compared to $40.1 million in the prior year and was positively impacted by higher lease revenue from more cars on lease, lower maintenance expense, a gain on the sale of a workshop in the current year and lower interest expense. These favorable items were largely offset by higher depreciation expense and the negative effects of foreign exchange.

Revenues

Lease revenue decreased $10.4 million in 2015, primarily due to the effects of a weaker euro, as noted above. The decrease was partially offset by additional cars on lease in the current year. Other revenue decreased $0.8 million primarily due to the absence of interest income on a loan that was repaid in the current year.

Expenses

Maintenance expense decreased $4.8 million in 2015, primarily due to the positive effects of foreign exchange, lower costs at our European maintenance facilities and lower costs of wheelset replacements, partially offset by higher cost of railcar revisions. Depreciation expense decreased $2.0 million, largely due to the effects of foreign exchange partially offset by the impact of new cars added to the fleet.

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Other Income (Expense)

Net gain on asset dispositions increased $1.0 million in 2015, primarily due to a gain on the sale of a workshop in the current year, partially offset by lower railcar scrapping gains and fewer railcars sold. Net interest expense decreased $2.9 million, driven by lower average rates in the current year and the effects of foreign exchange. Other expense decreased $1.5 million largely due to the net impact of changes in foreign exchange rates on non-functional currency items and derivatives, partially offset by higher legal fees and costs related to the early repayment of debt in the current year.

Investment Volume

Investment volume in 2015, which includes progress payments on scheduled deliveries of new railcars and car improvements, was $69.2 million compared to $81.6 million in 2014. During 2015, we took delivery of 550 railcars at GRE, 277 railcars at Rail India and 50 railcars at Rail Russia, compared to approximately 535 railcars at GRE in 2014.

Comparison of the Second Quarter of 2015 to the Second Quarter of 2014

Foreign Currency

In the second quarter of 2015, a weaker euro negatively impacted lease revenue by approximately $9.1 million and segment profit, excluding other income (expense), by approximately $4.9 million compared to the second quarter of 2014.

Segment Profit

Segment profit was $19.1 million in 2015, compared to $19.4 million in 2014 and was positively impacted by higher lease revenue from more cars on lease and lower interest expense. These favorable items were partially offset by higher depreciation expense, lower asset remarketing income and the negative effects of foreign exchange.

Revenues

Lease revenue decreased $5.3 million, primarily due to the effects of a weaker euro. The decrease was partially offset by additional cars on lease in the current year. Other revenue decreased $0.7 million primarily due to the absence of interest income on a loan that was repaid in the current year.

Expenses

Maintenance expense decreased $2.2 million, largely due to the effects of foreign exchange. Depreciation expense decreased $1.0 million, driven by the effects of foreign exchange, partially offset by the impact of new cars added to the fleet. Other operating expense increased $0.5 million primarily due to higher switching and freight costs.

Other Income (Expense)

Net gain on asset dispositions decreased $1.5 million, primarily due to a gain on the sale of railcars in the prior year and lower railcar scrapping gains. Net interest expense decreased $3.2 million primarily due to lower average rates in the current year and the effects of foreign exchange. Other expense decreased $1.5 million largely due to the net impact of changes in foreign exchange rates on non-functional currency items and derivatives, partially offset by higher legal fees and costs related to the early repayment of debt in the current year.

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ASC

Segment Summary

Extended winter weather conditions on the Great Lakes resulted in significant ice coverage and thickness and a later start to the 2015 sailing season, consistent with 2014. ASC experienced lower demand for iron ore shipments as domestic steel production declined. ASC expects to recover some of this lost iron ore volume in the second half of the year, but segment profit for the full year will be lower than 2014. Twelve vessels were in service at the end of the quarter, compared to thirteen vessels in the prior year.

During the first six months of 2015, we carried 9.2 million net tons of freight compared to 8.3 million net tons during the first six months of 2014.

The following table shows ASC’s segment results (in millions):

	Three Months Ended June 30						Six Months Ended June 30
	2015			2014			2015			2014
Revenues
Lease revenue	$	1.0		$	1.0		$	2.0		$	2.1
Marine operating revenue	51.0			59.4			58.0			62.5
Total Revenues	52.0			60.4			60.0			64.6
Expenses
Maintenance expense	7.0			7.3			7.2			7.5
Marine operating expense	34.1			42.3			41.0			45.7
Depreciation expense	4.9			4.4			4.9			4.4
Operating lease expense	1.7			1.7			1.7			1.7
Total Expenses	47.7			55.7			54.8			59.3
Other Income (Expense)
Net loss on asset dispositions	—			—			—			(0.4		)
Interest expense, net	(1.3		)	(1.4		)	(2.6		)	(2.8		)
Other expense	(0.1		)	(0.2		)	(0.1		)	(0.2		)
Segment Profit	$	2.9		$	3.1		$	2.5		$	1.9
Investment Volume	$	10.2		$	7.7		$	19.5		$	16.0
Total Net Tons Carried (000's)	8,447			7,827			9,231			8,276

Comparison of the First Six Months of 2015 to the First Six Months of 2014

Segment Profit

Segment profit was $2.5 million, compared to a profit of $1.9 million in the prior period. Both periods were impacted by difficult operating conditions on the Great Lakes. Additionally, results in the current year were negatively impacted by lower shipments of higher-margin iron ore.

Revenues

Marine operating revenue decreased $4.5 million in 2015, primarily due to lower shipments of iron ore, which is longer haul, higher rate business, the impact of which more than offset the increase in overall volume. In addition, lower fuel revenue, which is offset in marine operating expense, contributed to the variance.

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Expenses

Marine operating expense decreased $4.7 million in 2015, largely driven by lower fuel costs and the impact of fewer operating days. Due to the delay in the deployment of vessels at the beginning of the season, as well as the temporary lay-up of certain vessels for repairs, total operating days were lower in the current year. Inefficiencies associated with extended winter conditions earlier in each year also negatively impacted operations in both periods.

Other Income (Expense)

Net loss on asset dispositions of $0.4 million in 2014 was attributable to the ultimate disposal of an older, idle vessel.

Investment Volume

ASC's investments in each period consisted of structural and mechanical upgrades to our vessels.

Comparison of the Second Quarter of 2015 to the Second Quarter of 2014

Segment Profit

Segment profit was $2.9 million, compared to a profit of $3.1 million in the prior period. Lower iron ore shipments more than offset the impact of higher overall volume and lower marine operating expenses.

Revenues

Marine operating revenue decreased $8.4 million in 2015, primarily due to lower shipments of iron ore, which is longer haul, higher rate business, which more than offset the impact of higher overall volume. In addition, lower fuel revenue, which is offset in marine operating expense, contributed to the variance.

Expenses

Marine operating expense decreased $8.2 million in 2015, largely driven by lower fuel costs, fewer operating days and the temporary lay-up of a particular vessel for repairs.

Other Income (Expense)

Other expenses were comparable to prior year.

PORTFOLIO MANAGEMENT

Segment Summary

Portfolio Management's total asset base was $796.5 million at June 30, 2015, compared to $813.3 million at December 31, 2014, and $859.3 million at June 30, 2014.

The Rolls-Royce & Partners Finance companies (collectively the "RRPF affiliates") reported solid results, which reflect continued strong demand for spare aircraft engines. The RRPF affiliates contributed $24.0 million and $12.4 million to segment profit for the first six months and second quarter of 2015, compared to $21.8 million and $11.3 million in 2014.

The outlook for the inland marine market continues to be favorable for the remainder of 2015. Separately, the ocean-going vessels have recorded mixed results. The Nordic vessels have benefited from increased freight rates, resulting from an increase in demand and a decrease in excess supply. Alternatively, the Norgas vessels have experienced a significant market slowdown, resulting in reduced loads, shipments and rates. In aggregate, marine operations had a higher contribution to our segment profit for the first six months of 2015 compared to 2014.

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The following table shows Portfolio Management's segment results (in millions):

	Three Months Ended June 30						Six Months Ended June 30
	2015			2014			2015			2014
Revenues
Lease revenue	$	6.3		$	7.4		$	13.0		$	14.8
Marine operating revenue	15.0			12.8			32.2			27.4
Other revenue	0.2			0.8			0.8			2.5
Total Revenues	21.5			21.0			46.0			44.7
Expenses
Marine operating expense	13.2			12.3			25.2			23.9
Depreciation expense	5.4			5.8			10.9			11.3
Other operating expense	0.5			0.5			1.4			0.9
Total Expenses	19.1			18.6			37.5			36.1
Other Income (Expense)
Net gain on asset dispositions	1.5			1.7			5.1			3.0
Interest expense, net	(5.6		)	(6.1		)	(10.8		)	(12.9		)
Other income	—			—			—			0.3
Share of affiliates' earnings (pretax)	12.0			13.5			23.4			24.4
Segment Profit	$	10.3		$	11.5		$	26.2		$	23.4
Investment Volume	$	0.3		$	12.0		$	0.3		$	12.0

The following table shows the approximate net book values of Portfolio Management's assets (in millions):

	June 30 2014		September 30 2014		December 31 2014		March 31 2015		June 30 2015
Net book value of owned assets	$	523.0	$	488.5	$	474.6	$	450.2	$	442.8
Affiliate investments	336.3		327.9		338.7		344.2		353.7
Net book value of managed portfolio	85.1		77.4		64.1		107.8		88.1

Comparison of the First Six Months of 2015 to the First Six Months of 2014

Segment Profit

Segment profit was $26.2 million, compared to $23.4 million in the prior year. This increase was attributable to higher marine operating income, lower interest expense and higher gains on asset dispositions. These favorable items were partially offset by lower lease revenue and share of affiliates' earnings.

Revenues

Lease revenue decreased $1.8 million in 2015, primarily due to the sale of leased assets in both years. Marine operating revenue increased $4.8 million, primarily due to higher inland marine revenue and higher revenue from the Nordic vessels, partially offset by lower revenue from the Norgas vessels. Other revenue decreased $1.7 million, primarily due to lower distributions from investment funds and lower interest income due to the payoff of loans in the prior year.

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Expenses

Marine operating expense increased $1.3 million in 2015, primarily due to higher expenses for inland marine operations and higher expenses for the Norgas vessels related to the allocation of expenses from the pool in which it operates. Partially offsetting these higher expenses was an insurance claim recovery received in the current year.

Other Income (Expense)

Net gain on asset dispositions increased $2.1 million in 2015, primarily due to the sale of an inland marine asset in the current year. Net interest expense decreased $2.1 million as a result of a lower average debt balance and lower average interest rates.

Share of affiliates' earnings decreased $1.0 million in 2015, largely due to a casualty gain recognized at our Cardinal Marine affiliate in the prior year and the absence of earnings from terminated joint ventures, partially offset by lower interest expense and higher gains on engine disposals at the RRPF affiliates in the current year.

Investment Volume

Investment volume in 2015 included $0.3 million to convert six open hopper barges to covered hopper barges.

Comparison of the Second Quarter of 2015 to the Second Quarter of 2014

Segment Profit

Segment profit was $10.3 million in 2015 compared to $11.5 million in the prior year. This decrease was attributable to lower share of affiliates' earnings and lower lease revenue, partially offset by lower interest expense.

Revenues

Lease revenue decreased $1.1 million in 2015, primarily due to the sale of leased assets in both years. Marine operating revenue increased $2.2 million, primarily due to higher revenue from the Nordic vessels and higher inland marine revenue, partially offset by lower revenue from the Norgas vessels. Other revenue decreased $0.6 million, primarily due to lower interest income due to the payoff of loans in the prior year and lower distributions from investment funds.

Expenses

Marine operating expense increased $0.9 million in 2015, primarily due to higher expenses for the Norgas vessels related to the allocation of expenses from the pool in which it operates. Depreciation expense decreased $0.4 million primarily due to the sale of a leased asset in the current year.

Other Income (Expense)

Net gain on asset dispositions decreased $0.2 million in 2015, primarily due to fewer asset dispositions. Net interest expense decreased $0.5 million as a result of a lower average debt balance and lower average interest rates.

Share of affiliates' earnings decreased $1.5 million in 2015, largely due to a casualty gain recognized at our Cardinal Marine affiliate in the prior year and the absence of earnings from terminated joint ventures, partially offset by lower interest expense and higher gains on engine disposals at the RRPF affiliates in the current year.

33

OTHER

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

The following table shows components of Other (in millions):

	Three Months Ended June 30					Six Months Ended June 30
	2015			2014		2015		2014
Selling, general and administrative expense	$	44.6		$	44.9	$	90.3	$	87.6
Unallocated interest expense, net	4.0			0.5		7.4		3.5
Other expense (including eliminations)	(0.6		)	1.6		1.2		1.9

SG&A, Unallocated Interest and Other

SG&A was $2.7 million higher for the six months of 2015 compared to the prior year, primarily due to higher compensation and pension expense, partially offset by lower information technology expense. SG&A was modestly lower for the second quarter of 2015 compared to the prior year largely due to lower information technology expense, which is expected to be timing in nature, partially offset by higher pension expense. Unallocated interest expense (the difference between external interest expense and interest expense allocated to the reporting segments in accordance with assigned leverage targets) in any period is affected by our consolidated leverage position as well as the timing of debt issuances and investing activities. Other expense and eliminations decreased $0.7 million and $2.2 million for the first six months and the second quarter of 2015, compared to the prior year periods. Both decreases were due to the impacts of foreign exchange on a pension plan and termination costs incurred in the prior year related to the prepayment of debt.

Consolidated Income Taxes

See "Note 7. Income Taxes" in Part I, Item 1 of this Form 10-Q.

CASH FLOW AND LIQUIDITY

We generate a significant amount of cash from operating activities and from our investment portfolio. We also access domestic and international capital markets by issuing unsecured or secured debt and commercial paper. We use these sources of cash, along with our available cash balances, to fulfill our debt, lease, and dividend obligations and to fund portfolio investments and capital additions. We primarily use cash from operations and commercial paper issuances to fund daily operations.

The timing of asset dispositions and changes in working capital impacts cash flows from operations and portfolio proceeds. As a result, these cash flow components may vary materially from quarter to quarter and year to year. As of June 30, 2015, we had an unrestricted cash balance of $58.6 million.

34

The following table shows our principal sources and uses of cash for the six months endedJune 30 (in millions):

	2015			2014
Principal sources of cash
Net cash provided by operating activities	$	191.5		$	168.1
Portfolio proceeds	211.5			137.8
Other asset sales	12.9			16.3
Proceeds from issuance of debt, commercial paper, and credit facilities	689.0			993.7
	$	1,104.9		$	1,315.9
Principal uses of cash
Portfolio investments and capital additions	$	(356.2	)	$	(655.1	)
Repayments of debt, commercial paper, and credit facilities	(713.3		)	(665.8		)
Purchases of leased-in assets	(99.5		)	(150.5		)
Payments on capital lease obligations	(1.3		)	(1.3		)
Cash dividends	(35.2		)	(32.2		)
Stock repurchases	(64.1		)	(88.5		)
	$	(1,269.6	)	$	(1,593.4	)

Net cash provided by operating activities of $191.5 million increased $23.4 million compared to 2014. The increase was driven by higher lease revenue and lower maintenance expense, partially offset by a decrease in distributions from joint ventures and other net changes in certain working capital items.

Portfolio proceeds for the first six months of 2015 of $211.5 million increased by $73.7 million compared to 2014, driven by a loan repayment and higher asset sales. In January 2015, Ahaus Alstätter Eisenbahn Cargo AG (“AAE”) repaid its outstanding loan in the amount of €67.5 million ($76.4 million).

Proceeds from the issuance of debt for the first six months of 2015 were $689.0 million (net of hedges and debt issuance costs). In North America, $650 million of unsecured debt was issued, which included $100 million of 2.60% senior notes due in 2020, $300 million of 3.25% senior notes due in 2025, and $250 million of 4.50% senior notes due in 2045. In Europe, $56.5 million of unsecured debt was issued. Debt repayments of $713.3 million for the first six months of 2015 were $47.5 million higher than prior year and included debt repayments of $290.7 million in Europe. Each year included scheduled maturities in addition to the early retirement of higher cost debt.

Portfolio investments and capital additions primarily consist of purchases of operating assets, investments in affiliates, and capitalized asset improvements. See individual segment discussions for further information on investment volume. In 2014, we acquired a fleet of more than 18,500 boxcars for approximately $340 million.

In the first quarter of 2014, our board of directors authorized a $250 million share repurchase program. As of June 30, 2015, 3.1 million shares had been acquired for $192.5 million, and $57.5 million remains available under the repurchase authorization.

35

Short-Term Borrowings

The following table provides additional information regarding our short-term borrowings for the six months endedJune 30, 2015:

	North America (1)			Europe (2)
Balance as of June 30 (in millions)	$	—		$	3.8
Weighted average interest rate	—		%	1.3		%
Euro/Dollar exchange rate	n/a			1.11
Average amount outstanding year to date (in millions)	$	10.9		$	3.8
Weighted average interest rate	0.5		%	1.3		%
Average Euro/Dollar exchange rate	n/a			1.12
Average amount outstanding during 2nd quarter (in millions)	$	0.1		$	3.8
Weighted average interest rate	0.4		%	1.3		%
Average Euro/Dollar exchange rate	n/a			1.11
Maximum month-end amount outstanding year to date (in millions)	$	35.0		$	3.8
Applicable month-end Euro/Dollar exchange rate	n/a			1.11

_________

(1) Short-term borrowings in North America consist solely of commercial paper issued in the US.

(2) Short-term borrowings in Europe are comprised of borrowings under bank credit facilities.

Revolving Credit Facility

As of June 30, 2015, we had a $575 million 5-year unsecured credit facility in the US. In May 2015, we exercised an option to extend the maturity date of our revolving credit facility by one year to April 2020. As of June 30, 2015, the full $575 million was available under the facility.

Restrictive Covenants

Our $575 million revolving credit facility contains various restrictive covenants, including requirements to maintain a fixed charge coverage ratio and an asset coverage test. Some of our bank term loans have the same financial covenants as the facility.

The indentures for our public debt also contain various restrictive covenants, including limitation on liens provisions that limit the amount of additional secured indebtedness that we may incur. Additionally, certain exceptions to the covenants permit us to incur an unlimited amount of purchase money and nonrecourse indebtedness.

The loan agreements for our 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 or to distribute capital to certain related parties (including GATX, the US parent company). These covenants effectively limit GRE's ability to transfer funds to us.

We do not anticipate any covenant violations nor do we anticipate that any of these covenants will restrict our operations or our ability to obtain additional financing. At June 30, 2015, we were in compliance with all covenants and conditions of all of our credit agreements.

Credit Ratings

The global capital market environment and outlook may affect our funding options and our financial performance. Our access to capital markets at competitive rates depends on our credit rating and ratings outlook, as determined by rating agencies. As of June 30, 2015, our long-term unsecured debt was rated BBB by Standard & Poor's and Baa2 by Moody’s Investors Service and our short-term unsecured debt was rated A-2 by Standard & Poor's and P-2 by Moody’s Investor Service. Our rating outlook from both agencies was stable.

36

Contractual Commitments

The following table shows our contractual commitments, including debt principal amounts, lease payments, and portfolio investments at June 30, 2015, (in millions):

	Payments Due by Period
	Total		2015 (1)		2016		2017		2018		2019		Thereafter
Recourse debt	$	4,217.3	$	76.7	$	558.1	$	412.8	$	519.7	$	550.0	$	2,100.0
Nonrecourse debt	11.5		4.5		7.0		—		—		—		—
Commercial paper and credit facilities	3.8		3.8		—		—		—		—		—
Capital lease obligations	5.4		1.5		2.7		1.2		—		—		—
Operating leases — recourse	689.3		33.5		86.8		93.0		84.1		79.2		312.7
Operating leases — nonrecourse	60.4		5.5		8.1		9.5		9.0		9.7		18.6
Portfolio investments (2)	1,821.5		279.8		490.0		345.8		313.8		392.1		—
	$	6,809.2	$	405.3	$	1,152.7	$	862.3	$	926.6	$	1,031.0	$	2,431.3

_________

(1) For remainder of the year.

(2) Primarily railcar purchase commitments. The amounts shown for all years are based on management's estimates of the timing, anticipated car types and related costs of railcars to be purchased under its agreements. Amount shown for 2017 also includes $24.0 million related to an option we exercised to purchase a vessel that is currently on lease.

In 2014, we entered into a long-term supply agreement with Trinity Rail Group, LLC (“Trinity”), a subsidiary of Trinity Industries, Inc., to take effect upon the scheduled expiration of the current railcar supply agreement in 2016. Under terms of the agreement, we will purchase up to a total of 8,950 newly built railcars over a four-year period from March, 2016 through March, 2020. We may order both tank and freight cars; however, we expect that the majority of the order will be for tank cars. Except to the extent the parties otherwise agree, railcar pricing will be on an agreed upon or cost-plus basis subject to certain specified adjustments and surcharges throughout the term of the agreement. In addition, in January, 2017, either party may initiate a review of the cost-plus basis pricing if it is not reflective of then-current market prices. If the parties cannot agree on revised cost-plus pricing (or otherwise agree that no changes are necessary), either party may, at its election, deliver to the other party a notice of its intent to terminate, and in such case, the agreement will automatically terminate 30 days thereafter unless the non-terminating party agrees to a specified revised margin as set forth in the agreement.

CRITICAL ACCOUNTING POLICIES

There have been no changes to our critical accounting policies during the six months endedJune 30, 2015. Refer to our Annual Report on Form 10-K for the year ended December 31, 2014, for a summary of our policies.

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NON-GAAP FINANCIAL MEASURES

We compute some financial measures using non-GAAP components, as defined by the SEC. These measures are not in accordance with, or a substitute for, GAAP and our financial measures may be different from non-GAAP financial measures used by other companies.

We have provided a reconciliation of our non-GAAP components to the most directly comparable GAAP components. We include these non-GAAP financial measures to provide additional information and insight into our operating results and financial position. We use these measures in analyzing our financial performance from period to period and when making compensation decisions.

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 — Net income excluding certain items that we believe are not necessarily related to our ongoing business activities.

• Off-balance-sheet assets — Assets, primarily railcars, that are financed with operating leases and therefore not recorded on the balance sheet. We estimate 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 reported on the balance sheet.

• 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

Balance Sheet Measures

We disclose total on- and off-balance-sheet assets because a portion of our North America railcar fleet has been financed through sale-leasebacks that are accounted for as operating leases and the assets are not recorded on the balance sheet. Additionally, ASC utilizes a tug and barge unit that is accounted for as an operating lease and the assets are not recorded on the balance sheet. We believe this information provides investors with a better representation of the assets deployed in our businesses.

The following table shows total on- and off-balance-sheet assets (in millions):

	June 30 2014		September 30 2014		December 31 2014		March 31 2015		June 30 2015
Consolidated on-balance-sheet assets	$	6,921.1	$	6,816.3	$	6,937.5	$	7,056.4	$	6,860.0
Off-balance-sheet assets:
Rail North America	683.2		602.9		606.1		566.1		557.2
ASC	14.1		12.9		11.7		10.5		9.3
Total On- and Off-Balance-Sheet Assets	$	7,618.4	$	7,432.1	$	7,555.3	$	7,633.0	$	7,426.5
Shareholders’ Equity	$	1,374.4	$	1,331.2	$	1,314.0	$	1,282.5	$	1,285.4

38

Net Income Measures

We report net income excluding certain items that we believe are not necessarily reflective of our ongoing business activities. No such adjustments occurred in the first six months of 2015 or 2014, however, certain of these adjustments occurred in 2013 and impacted the computation of return on equity for the trailing twelve months earnings as disclosed in this report. The following table shows our net income, excluding tax adjustments and other items, for the trailing twelve months ended June 30 (in millions):

	2015		2014
Net income	$	217.4	$	202.3
Adjustments attributable to consolidated income:
GATX income taxes on sale of AAE (1)	—		23.2
Foreign tax credit carryforward (1)(2)	—		(3.9		)
Adjustments attributable to affiliates' earnings:
Pretax gain on sale of AAE (1)	—		(9.3		)
Gains on interest rate swaps at AAE, net of taxes (3)	—		(5.2		)
Income tax rate changes (4)	—		(7.6		)
Net income excluding tax adjustments and other items	$	217.4	$	199.5

________

(1) Aggregate after-tax impact of the AAE sale, including the $3.9 million foreign credit carryforward, was a net loss of $10.0

million.

(2) Represents benefits attributable to the utilization of foreign tax credit carryforwards.

(3) Represents unrealized gains on AAE interest rate swaps.

(4) Deferred tax adjustments due to an enacted statutory rate decrease in the United Kingdom.

39

Item 3. Quantitative and Qualitative Disclosures about Market Risk

Since December 31, 2014, there have been no material changes in our interest rate and foreign currency exposures or types of derivative instruments used to hedge these exposures. For a discussion of our exposure to market risk, refer to "Item 7A. Quantitative and Qualitative Disclosure about Market Risk" of our Annual Report on Form 10-K for the year ended December 31, 2014.

Item 4. Controls and Procedures

We have conducted an evaluation of our 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”)), with the participation of our Chief Executive Officer and Chief Financial Officer. Based on such evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that, as of the end of the period covered by this quarterly report, our disclosure controls and procedures were effective.

No change in our internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) occurred during the quarter ended June 30, 2015, that materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

40

PART II - OTHER INFORMATION

Item 1. Legal Proceedings

Information concerning litigation and other contingencies is described in "Note 11. Legal Proceedings and Other Contingencies" in Part I, Item 1 of this Form 10-Q and is incorporated herein by reference.

Item 1A.  Risk Factors

Since December 31, 2014, there have been no material changes in our risk factors. For a discussion of our risk factors, refer to "Item 1A. Risk Factors" of our Annual Report on Form 10-K for the year ended December 31, 2014.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

(c) On January 23, 2014, our board of directors authorized a $250 million share repurchase program. The following is a summary of stock repurchases for the quarter ended June 30, 2015. As of June 30, 2015, $57.5 million was available under the repurchase authorization.

Issuer Purchases of Equity Securities
	(a)	(b)	(c)	(d)
Total	Total Number of Shares Purchased	Average Price Paid per Share	Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Maximum Number (or Approximate Dollar Value) of Shares that May Yet Be Purchased Under the Plans or Programs (1)
April 1, 2015 - April 30, 2015	205,112	$57.83	205,112	$86.6 million
May 1, 2015 - May 31, 2015	222,715	$55.44	222,715	$74.2 million
June 1, 2015 - June 30, 2015	298,943	$56.01	298,943	$57.5 million
Total	726,770	$56.35	726,770

_________

(1) Does not include commissions paid to repurchase shares.

Item 6.  Exhibits

Exhibits:

Reference is made to the exhibit index which is included herewith and is incorporated by reference hereto.

41

SIGNATURE

Pursuant to the requirements 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/ Robert C. Lyons

Robert C. Lyons

Executive Vice President and Chief Financial Officer

(Duly Authorized Officer)

Date: July 31, 2015

42

EXHIBIT INDEX

Exhibit Number	Exhibit Description
	Filed with this Report:
10.1	Amendment No. 2 to the Credit Agreement, dated as of May 20, 2015, among GATX Corporation, as borrower, 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, N.A., 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.
31A.	Certification Pursuant to Exchange Act Rule 13a-14(a) and Rule 15d-14(a) (CEO Certification).
31B.	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 Quarterly Report on Form 10-Q for the quarter ended June 30, 2015, formatted in XBRL (eXtensible Business Reporting Language): (i) Consolidated Balance Sheets at June 30, 2015 and December 31, 2014, (ii) Consolidated Statements of Comprehensive Income for the three and six months ended June 30, 2015 and 2014, (iii) Consolidated Statements of Cash Flows for the six months ended June 30, 2015 and 2014, and (iv) Notes to the Consolidated Financial Statements.

43

EX-10.1

EX-31.A

Exhibit 31A

Certification of Principal Executive Officer

I, Brian A. Kenney, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q 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 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

July 31, 2015

EX-31.B

Exhibit 31B

Certification of Principal Financial Officer

I, Robert C. Lyons, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q 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 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

Executive Vice President and Chief Financial Officer

July 31, 2015

EX-32

Exhibit 32

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 Quarterly Report of GATX Corporation (the “Company”) on Form 10-Q for the period ending June 30, 2015, 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	Robert C. Lyons
Chairman, President and Chief Executive Officer	Executive Vice President and Chief Financial Officer

July 31, 2015

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.

XML

Income Taxes Statutory Tax Rate Reconciliation, Percent (Details)	6 Months Ended
	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%

XML

Pension and Other Post-Retirement Benefits (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Defined Benefit Plan Disclosure [Line Items]
Post-Retirement Benefit Plans, Reclassification adjustments into earnings	$ 3.5	$ 3.3
Defined Benefit Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	2.0		$ 1.6	$ 3.7	$ 3.0
Interest cost	5.0		5.3	9.9	10.4
Expected return on plan assets	(6.4)		(7.1)	(12.9)	(14.3)
Unrecognized prior service credit	(0.3)		(0.3)	(0.5)	(0.5)
Unrecognized net actuarial loss (gain)	3.9		3.1	7.4	5.7
Net expense	4.2		2.6	7.6	4.3
Retiree Health and Life [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.1		0.1	0.1	0.1
Interest cost	0.3		0.4	0.7	0.8
Expected return on plan assets	0.0		0.0	0.0	0.0
Unrecognized prior service credit	(0.1)		(0.1)	(0.1)	(0.1)
Unrecognized net actuarial loss (gain)	0.0		(0.1)	0.0	(0.1)
Net expense	$ 0.3		$ 0.3	$ 0.7	$ 0.7

XML

Financial Data of Business Segments (Tables)

6 Months Ended

Jun. 30, 2015

Segment Reporting Information [Line Items]

Segment Reporting Disclosure [Text Block]

Financial Data of Business Segments

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

We lease, operate, manage, and remarket long-lived, widely-used assets, primarily in the rail and marine markets. We also invest in joint ventures that complement our existing business activities. We report our financial results through fourprimary business segments: Rail North America, Rail International, ASC, and Portfolio Management.

Rail North America comprises our wholly owned operations in the United States, Canada, and Mexico, as well as an affiliate investment. 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 comprises our wholly owned European operations ("GATX Rail Europe" or "GRE"), a railcar leasing business in India ("GATX India Pte. Ltd." or "GIPL"), and a recently established railcar leasing business in Russia ("GATX Rail Vostok LLC" or "GRV"), as well as one development stage affiliate in China. GRE leases railcars 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 US-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 generates leasing, marine operating, asset remarketing and management fee income through a collection of diversified wholly owned assets and joint venture 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, pretax 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.

We allocate debt balances and related interest expense to each segment based upon a predetermined fixed recourse leverage level expressed as a ratio of recourse debt (including off-balance-sheet debt) to equity. The leverage levels are 5:1 for Rail North America, 2:1 for Rail International, 1.5:1 for ASC, and 3:1 for Portfolio Management. We believe that by using this leverage and interest expense allocation methodology, each operating segment’s financial performance reflects appropriate risk-adjusted borrowing costs.

The following tables show certain segment data for each of our business segments (in millions):

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
Three Months Ended June 30, 2015
Profitability
Revenues
Lease revenue	$	230.9		$	42.4		$	1.0		$	6.3		$	—		$	280.6
Marine operating revenue	—			—			51.0			15.0			—			66.0
Other revenue	16.8			1.7			—			0.2			—			18.7
Total Revenues	247.7			44.1			52.0			21.5			—			365.3
Expenses
Maintenance expense	63.8			9.4			7.0			—			—			80.2
Marine operating expense	—			—			34.1			13.2			—			47.3
Depreciation expense	53.3			10.8			4.9			5.4			—			74.4
Operating lease expense	20.7			0.1			1.7			—			(0.1		)	22.4
Other operating expense	5.8			1.5			—			0.5			—			7.8
Total Expenses	143.6			21.8			47.7			19.1			(0.1		)	232.1
Other Income (Expense)
Net gain on asset dispositions	6.1			1.1			—			1.5			—			8.7
Interest expense, net	(24.6		)	(3.0		)	(1.3		)	(5.6		)	(4.0		)	(38.5		)
Other (expense) income	(0.8		)	(1.2		)	(0.1		)	—			0.5			(1.6		)
Share of affiliates' earnings (pretax)	0.1			(0.1		)	—			12.0			—			12.0
Segment Profit (Loss)	$	84.9		$	19.1		$	2.9		$	10.3		$	(3.4	)	113.8
Selling, general and administrative expense																44.6
Income taxes (including $3.0 related to affiliates' earnings)																23.8
Net Income																$	45.4
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	$	5.0		$	—		$	—		$	0.1		$	—		$	5.1
Residual sharing income	0.2			—			—			1.4			—			1.6
Non-remarketing disposition gains (1)	0.9			1.1			—			—			—			2.0
Asset impairment	—			—			—			—			—			—
	$	6.1		$	1.1		$	—		$	1.5		$	—		$	8.7
Capital Expenditures
Portfolio investments and capital additions	$	135.2		$	27.8		$	10.2		$	0.3		$	1.8		$	175.3
Selected Balance Sheet Data at June 30, 2015
Investments in affiliated companies	$	13.4		$	1.6		$	—		$	353.7		$	—		$	368.7
Identifiable assets	$	4,560.4		$	1,104.9		$	307.8		$	796.5		$	90.4		$	6,860.0

_____

(1) Includes scrapping gains.

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
Three Months Ended June 30, 2014
Profitability
Revenues
Lease revenue	$	218.2		$	47.7		$	1.0		$	7.4		$	—		$	274.3
Marine operating revenue	—			—			59.4			12.8			—			72.2
Other revenue	16.1			2.4			—			0.8			—			19.3
Total Revenues	234.3			50.1			60.4			21.0			—			365.8
Expenses
Maintenance expense	65.1			11.6			7.3			—			—			84.0
Marine operating expense	—			—			42.3			12.3			—			54.6
Depreciation expense	49.1			11.8			4.4			5.8			—			71.1
Operating lease expense	25.7			—			1.7			—			(0.1		)	27.3
Other operating expense	5.2			1.0			—			0.5			—			6.7
Total Expenses	145.1			24.4			55.7			18.6			(0.1		)	243.7
Other Income (Expense)
Net gain on asset dispositions	23.9			2.6			—			1.7			—			28.2
Interest expense, net	(25.3		)	(6.2		)	(1.4		)	(6.1		)	(0.5		)	(39.5		)
Other expense	(0.3		)	(2.7		)	(0.2		)	—			(1.7		)	(4.9		)
Share of affiliates' earnings (pretax)	4.2			—			—			13.5			—			17.7
Segment Profit (Loss)	$	91.7		$	19.4		$	3.1		$	11.5		$	(2.1	)	123.6
Selling, general and administrative expense																44.9
Income taxes (including $5.4 related to affiliates' earnings)																25.6
Net Income																$	53.1
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	$	17.7		$	0.6		$	—		$	0.5		$	—		$	18.8
Residual sharing income	3.8			—			—			1.2			—			5.0
Non-remarketing disposition gains (1)	2.4			2.0			—			—			—			4.4
Asset impairment	—			—			—			—			—			—
	$	23.9		$	2.6		$	—		$	1.7		$	—		$	28.2
Capital Expenditures
Portfolio investments and capital additions	$	145.8		$	42.3		$	7.7		$	12.0		$	1.8		$	209.6
Selected Balance Sheet Data at December 31, 2014
Investments in affiliated companies	$	17.2		$	1.8		$	—		$	338.7		$	—		$	357.7
Identifiable assets	$	4,358.3		$	1,229.4		$	286.7		$	813.3		$	249.8		$	6,937.5

_____

(1) Includes scrapping gains.

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
Six Months Ended June 30, 2015
Profitability
Revenues
Lease revenue	$	459.4		$	84.5		$	2.0		$	13.0		$	—		$	558.9
Marine operating revenue	—			—			58.0			32.2			—			90.2
Other revenue	31.5			3.6			—			0.8			—			35.9
Total Revenues	490.9			88.1			60.0			46.0			—			685.0
Expenses
Maintenance expense	133.0			18.3			7.2			—			—			158.5
Marine operating expense	—			—			41.0			25.2			—			66.2
Depreciation expense	105.6			21.5			4.9			10.9			—			142.9
Operating lease expense	41.4			0.1			1.7			—			(0.1		)	43.1
Other operating expense	11.3			2.4			—			1.4			—			15.1
Total Expenses	291.3			42.3			54.8			37.5			(0.1		)	425.8
Other Income (Expense)
Net gain on asset dispositions	42.9			6.0			—			5.1			—			54.0
Interest expense, net	(49.1		)	(9.5		)	(2.6		)	(10.8		)	(7.4		)	(79.4		)
Other expense	(3.0		)	(1.2		)	(0.1		)	—			(1.3		)	(5.6		)
Share of affiliates' earnings (pretax)	0.3			(0.2		)	—			23.4			—			23.5
Segment Profit (Loss)	$	190.7		$	40.9		$	2.5		$	26.2		$	(8.6	)	251.7
Selling, general and administrative expense																90.3
Income taxes (including $6.0 related to affiliates' earnings)																53.8
Net Income																$	107.6
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	$	40.9		$	—		$	—		$	2.1		$	—		$	43.0
Residual sharing income	0.4			—			—			3.0			—			3.4
Non-remarketing disposition gains (1)	1.6			6.1			—			—			—			7.7
Asset impairment	—			(0.1		)	—			—			—			(0.1		)
	$	42.9		$	6.0		$	—		$	5.1		$	—		$	54.0
Capital Expenditures
Portfolio investments and capital additions	$	265.0		$	69.2		$	19.5		$	0.3		$	2.2		$	356.2

_____

(1) Includes scrapping gains.

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
Six Months Ended June 30, 2014
Profitability
Revenues
Lease revenue	$	413.1		$	94.9		$	2.1		$	14.8		$	—		$	524.9
Marine operating revenue	—			—			62.5			27.4			—			89.9
Other revenue	30.7			4.4			—			2.5			—			37.6
Total Revenues	443.8			99.3			64.6			44.7			—			652.4
Expenses
Maintenance expense	126.5			23.1			7.5			—			—			157.1
Marine operating expense	—			—			45.7			23.9			—			69.6
Depreciation expense	90.6			23.5			4.4			11.3			—			129.8
Operating lease expense	52.6			—			1.7			—			(0.1		)	54.2
Other operating expense	10.0			2.4			—			0.9			—			13.3
Total Expenses	279.7			49.0			59.3			36.1			(0.1		)	424.0
Other Income (Expense)
Net gain on asset dispositions	48.7			5.0			(0.4		)	3.0			—			56.3
Interest expense, net	(49.9		)	(12.4		)	(2.8		)	(12.9		)	(3.5		)	(81.5		)
Other (expense) income	(3.7		)	(2.7		)	(0.2		)	0.3			(2.0		)	(8.3		)
Share of affiliates' earnings (pretax)	7.5			(0.1		)	—			24.4			—			31.8
Segment Profit (Loss)	$	166.7		$	40.1		$	1.9		$	23.4		$	(5.4	)	226.7
Selling, general and administrative expense																87.6
Income taxes (including $9.6 related to affiliates' earnings)																43.9
Net Income																$	95.2
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	$	39.3		$	0.6		$	—		$	0.5		$	—		$	40.4
Residual sharing income	4.4			—			—			2.4			—			6.8
Non-remarketing disposition gains (1)	5.0			4.4			—			—			—			9.4
Asset impairment	—			—			(0.4		)	0.1			—			(0.3		)
	$	48.7		$	5.0		$	(0.4	)	$	3.0		$	—		$	56.3
Capital Expenditures
Portfolio investments and capital additions	$	541.8		$	81.6		$	16.0		$	12.0		$	3.7		$	655.1

_____

(1) Includes scrapping gains.

Segment data

The following tables show certain segment data for each of our business segments (in millions):

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
Three Months Ended June 30, 2015
Profitability
Revenues
Lease revenue	$	230.9		$	42.4		$	1.0		$	6.3		$	—		$	280.6
Marine operating revenue	—			—			51.0			15.0			—			66.0
Other revenue	16.8			1.7			—			0.2			—			18.7
Total Revenues	247.7			44.1			52.0			21.5			—			365.3
Expenses
Maintenance expense	63.8			9.4			7.0			—			—			80.2
Marine operating expense	—			—			34.1			13.2			—			47.3
Depreciation expense	53.3			10.8			4.9			5.4			—			74.4
Operating lease expense	20.7			0.1			1.7			—			(0.1		)	22.4
Other operating expense	5.8			1.5			—			0.5			—			7.8
Total Expenses	143.6			21.8			47.7			19.1			(0.1		)	232.1
Other Income (Expense)
Net gain on asset dispositions	6.1			1.1			—			1.5			—			8.7
Interest expense, net	(24.6		)	(3.0		)	(1.3		)	(5.6		)	(4.0		)	(38.5		)
Other (expense) income	(0.8		)	(1.2		)	(0.1		)	—			0.5			(1.6		)
Share of affiliates' earnings (pretax)	0.1			(0.1		)	—			12.0			—			12.0
Segment Profit (Loss)	$	84.9		$	19.1		$	2.9		$	10.3		$	(3.4	)	113.8
Selling, general and administrative expense																44.6
Income taxes (including $3.0 related to affiliates' earnings)																23.8
Net Income																$	45.4
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	$	5.0		$	—		$	—		$	0.1		$	—		$	5.1
Residual sharing income	0.2			—			—			1.4			—			1.6
Non-remarketing disposition gains (1)	0.9			1.1			—			—			—			2.0
Asset impairment	—			—			—			—			—			—
	$	6.1		$	1.1		$	—		$	1.5		$	—		$	8.7
Capital Expenditures
Portfolio investments and capital additions	$	135.2		$	27.8		$	10.2		$	0.3		$	1.8		$	175.3
Selected Balance Sheet Data at June 30, 2015
Investments in affiliated companies	$	13.4		$	1.6		$	—		$	353.7		$	—		$	368.7
Identifiable assets	$	4,560.4		$	1,104.9		$	307.8		$	796.5		$	90.4		$	6,860.0

_____

(1) Includes scrapping gains.

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
Three Months Ended June 30, 2014
Profitability
Revenues
Lease revenue	$	218.2		$	47.7		$	1.0		$	7.4		$	—		$	274.3
Marine operating revenue	—			—			59.4			12.8			—			72.2
Other revenue	16.1			2.4			—			0.8			—			19.3
Total Revenues	234.3			50.1			60.4			21.0			—			365.8
Expenses
Maintenance expense	65.1			11.6			7.3			—			—			84.0
Marine operating expense	—			—			42.3			12.3			—			54.6
Depreciation expense	49.1			11.8			4.4			5.8			—			71.1
Operating lease expense	25.7			—			1.7			—			(0.1		)	27.3
Other operating expense	5.2			1.0			—			0.5			—			6.7
Total Expenses	145.1			24.4			55.7			18.6			(0.1		)	243.7
Other Income (Expense)
Net gain on asset dispositions	23.9			2.6			—			1.7			—			28.2
Interest expense, net	(25.3		)	(6.2		)	(1.4		)	(6.1		)	(0.5		)	(39.5		)
Other expense	(0.3		)	(2.7		)	(0.2		)	—			(1.7		)	(4.9		)
Share of affiliates' earnings (pretax)	4.2			—			—			13.5			—			17.7
Segment Profit (Loss)	$	91.7		$	19.4		$	3.1		$	11.5		$	(2.1	)	123.6
Selling, general and administrative expense																44.9
Income taxes (including $5.4 related to affiliates' earnings)																25.6
Net Income																$	53.1
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	$	17.7		$	0.6		$	—		$	0.5		$	—		$	18.8
Residual sharing income	3.8			—			—			1.2			—			5.0
Non-remarketing disposition gains (1)	2.4			2.0			—			—			—			4.4
Asset impairment	—			—			—			—			—			—
	$	23.9		$	2.6		$	—		$	1.7		$	—		$	28.2
Capital Expenditures
Portfolio investments and capital additions	$	145.8		$	42.3		$	7.7		$	12.0		$	1.8		$	209.6
Selected Balance Sheet Data at December 31, 2014
Investments in affiliated companies	$	17.2		$	1.8		$	—		$	338.7		$	—		$	357.7
Identifiable assets	$	4,358.3		$	1,229.4		$	286.7		$	813.3		$	249.8		$	6,937.5

_____

(1) Includes scrapping gains.

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
Six Months Ended June 30, 2015
Profitability
Revenues
Lease revenue	$	459.4		$	84.5		$	2.0		$	13.0		$	—		$	558.9
Marine operating revenue	—			—			58.0			32.2			—			90.2
Other revenue	31.5			3.6			—			0.8			—			35.9
Total Revenues	490.9			88.1			60.0			46.0			—			685.0
Expenses
Maintenance expense	133.0			18.3			7.2			—			—			158.5
Marine operating expense	—			—			41.0			25.2			—			66.2
Depreciation expense	105.6			21.5			4.9			10.9			—			142.9
Operating lease expense	41.4			0.1			1.7			—			(0.1		)	43.1
Other operating expense	11.3			2.4			—			1.4			—			15.1
Total Expenses	291.3			42.3			54.8			37.5			(0.1		)	425.8
Other Income (Expense)
Net gain on asset dispositions	42.9			6.0			—			5.1			—			54.0
Interest expense, net	(49.1		)	(9.5		)	(2.6		)	(10.8		)	(7.4		)	(79.4		)
Other expense	(3.0		)	(1.2		)	(0.1		)	—			(1.3		)	(5.6		)
Share of affiliates' earnings (pretax)	0.3			(0.2		)	—			23.4			—			23.5
Segment Profit (Loss)	$	190.7		$	40.9		$	2.5		$	26.2		$	(8.6	)	251.7
Selling, general and administrative expense																90.3
Income taxes (including $6.0 related to affiliates' earnings)																53.8
Net Income																$	107.6
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	$	40.9		$	—		$	—		$	2.1		$	—		$	43.0
Residual sharing income	0.4			—			—			3.0			—			3.4
Non-remarketing disposition gains (1)	1.6			6.1			—			—			—			7.7
Asset impairment	—			(0.1		)	—			—			—			(0.1		)
	$	42.9		$	6.0		$	—		$	5.1		$	—		$	54.0
Capital Expenditures
Portfolio investments and capital additions	$	265.0		$	69.2		$	19.5		$	0.3		$	2.2		$	356.2

_____

(1) Includes scrapping gains.

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
Six Months Ended June 30, 2014
Profitability
Revenues
Lease revenue	$	413.1		$	94.9		$	2.1		$	14.8		$	—		$	524.9
Marine operating revenue	—			—			62.5			27.4			—			89.9
Other revenue	30.7			4.4			—			2.5			—			37.6
Total Revenues	443.8			99.3			64.6			44.7			—			652.4
Expenses
Maintenance expense	126.5			23.1			7.5			—			—			157.1
Marine operating expense	—			—			45.7			23.9			—			69.6
Depreciation expense	90.6			23.5			4.4			11.3			—			129.8
Operating lease expense	52.6			—			1.7			—			(0.1		)	54.2
Other operating expense	10.0			2.4			—			0.9			—			13.3
Total Expenses	279.7			49.0			59.3			36.1			(0.1		)	424.0
Other Income (Expense)
Net gain on asset dispositions	48.7			5.0			(0.4		)	3.0			—			56.3
Interest expense, net	(49.9		)	(12.4		)	(2.8		)	(12.9		)	(3.5		)	(81.5		)
Other (expense) income	(3.7		)	(2.7		)	(0.2		)	0.3			(2.0		)	(8.3		)
Share of affiliates' earnings (pretax)	7.5			(0.1		)	—			24.4			—			31.8
Segment Profit (Loss)	$	166.7		$	40.1		$	1.9		$	23.4		$	(5.4	)	226.7
Selling, general and administrative expense																87.6
Income taxes (including $9.6 related to affiliates' earnings)																43.9
Net Income																$	95.2
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	$	39.3		$	0.6		$	—		$	0.5		$	—		$	40.4
Residual sharing income	4.4			—			—			2.4			—			6.8
Non-remarketing disposition gains (1)	5.0			4.4			—			—			—			9.4
Asset impairment	—			—			(0.4		)	0.1			—			(0.3		)
	$	48.7		$	5.0		$	(0.4	)	$	3.0		$	—		$	56.3
Capital Expenditures
Portfolio investments and capital additions	$	541.8		$	81.6		$	16.0		$	12.0		$	3.7		$	655.1

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Earnings Per Share (Details) - USD ($)	3 Months Ended		6 Months Ended		18 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015
Earnings Per Share [Abstract]
Stock Repurchase Program, Authorized Amount		$ 250,000,000		$ 250,000,000
Stock Repurchased During Period, Shares			1,200,000.0		3,100,000.0
Treasury Stock, Value, Acquired, Cost Method			$ 68,000,000		$ 192,500,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 57,500,000		57,500,000		$ 57,500,000
Numerator:
Net income	$ 45,400,000	$ 53,100,000	$ 107,600,000	$ 95,200,000
Denominator:
Denominator for basic earnings per share — weighted average shares	43,500,000	45,500,000	43,800,000	45,700,000
Effect of dilutive securities:
Equity compensation plans	700,000	800,000	700,000	800,000
Denominator for diluted earnings per share — adjusted weighted average and assumed conversion	44,200,000	46,300,000	44,500,000	46,500,000
Basic earnings per share (in dollars per share)	$ 1.04	$ 1.17	$ 2.46	$ 2.08
Diluted earnings per share (in dollars per share)	$ 1.03	$ 1.15	$ 2.42	$ 2.05

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Income Taxes Effective tax rate (Details)	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent	35.00%	32.00%

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Fair Value Disclosure

6 Months Ended

Jun. 30, 2015

Fair Value Disclosures [Abstract]

Fair Value Disclosures [Text Block]

Fair Value Disclosure

The following tables show our assets and liabilities that are measured at fair value on a recurring basis (in millions):

Assets	June 30, 2015		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs    (Level 3)
Interest rate derivatives (1)	$	1.6	$	—	$	1.6	$	—
Foreign exchange rate derivatives (1)	7.8		—		7.8		—
Foreign exchange rate derivatives (2)	1.6		—		1.6		—
Available-for-sale equity securities	4.2		4.2		—		—
Liabilities
Foreign exchange rate derivatives (1)	4.2		—		4.2		—
Foreign exchange rate derivatives (2)	2.5		—		2.5		—

Assets	December 31, 2014		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Interest rate derivatives (1)	$	1.8	$	—	$	1.8	$	—
Foreign exchange rate derivatives (2)	9.7		—		9.7		—
Available-for-sale equity securities	4.4		4.4		—		—
Liabilities
Interest rate derivatives (1)	5.9		—		5.9		—
Foreign exchange rate derivatives (2)	1.6		—		1.6		—

_________

(1) Designated as hedges.

(2) Not designated as hedges.

We base our valuations of available-for-sale equity securities on their quoted prices on an active exchange. We value derivatives using a pricing model with inputs (such as yield curves and foreign currency rates) that are observable in the market or that can be derived principally from observable market data.

Derivative instruments

Fair Value Hedges

We use interest rate swaps to manage the fixed-to-floating rate mix of our debt obligations by converting the fixed rate debt to floating rate debt. For fair value hedges, we recognize changes in fair value of both the derivative and the hedged item as interest expense. We had eight instruments outstanding with an aggregate notional amount of $550.0 million as of June 30, 2015 that mature from 2017 to 2020, and eight instruments outstanding with an aggregate notional amount of $600.0 million as of December 31, 2014 that mature from 2015 to 2020.

Cash Flow Hedges

We use interest rate swaps to convert floating rate debt to fixed rate debt. We use Treasury rate locks to hedge our exposure to interest rate risk on anticipated transactions. We also use currency swaps to hedge our exposure to fluctuations in the exchange rates of the foreign currencies in which we conduct business. We had seven instruments outstanding with an aggregate notional amount of $346.2 million as of June 30, 2015, and seven instruments outstanding with an aggregate notional amount of $281.5 million as of December 31, 2014. These derivatives had maturities ranging from 2015 to 2022. Within the next 12 months, we expect to reclassify $5.7 million ($3.6 million after-tax) of net losses on previously terminated derivatives from accumulated other comprehensive loss. We reclassify these amounts when interest and operating lease expense on the related hedged transactions affect earnings.

Non-designated Derivatives

We do not hold derivative financial instruments for purposes other than hedging, although certain of our derivatives are not designated as accounting hedges. We recognize changes in the fair value of these derivatives in other (income) expense immediately.

Some of our derivative instruments contain credit risk provisions that could require us to make immediate payment on net liability positions in the event that we default on certain outstanding debt obligations. The aggregate fair value of our derivative instruments with credit risk related contingent features that are in a liability position as of June 30, 2015, was $4.2 million. We are not required to post any collateral on our derivative instruments and do not expect the credit risk provisions to be triggered.

In the event that a counterparty fails to meet the terms of an interest rate swap agreement or a foreign exchange contract, our exposure is limited to the fair value of the swap, if in our favor. We manage the credit risk of counterparties by transacting with institutions that we consider financially sound and by avoiding concentrations of risk with a single counterparty. We believe that the risk of non-performance by any of our counterparties is remote.

The following table shows the impacts of our derivative instruments on our statements of comprehensive income (in millions):

		Three Months Ended June 30						Six Months Ended June 30
Derivative Designation	Location of Loss (Gain) Recognized	2015			2014			2015			2014
Fair value hedges (1)	Interest expense	$	1.4		$	(0.5	)	$	(0.9	)	$	1.6
Cash flow hedges	Other comprehensive (income) loss (effective portion)	10.9			1.4			2.5			3.2
Cash flow hedges	Interest expense (effective portion reclassified from accumulated other comprehensive loss)	1.4			1.2			2.7			2.4
Cash flow hedges	Operating lease expense (effective portion reclassified from accumulated other comprehensive loss)	0.1			0.3			0.2			0.5
Cash flow hedges (2)	Other (income) expense (effective portion reclassified from accumulated other comprehensive loss)	12.6			—			4.2			2.2
Non-designated (3)	Other (income) expense	(1.6		)	0.9			(5.8		)	1.0

_________

(1) The fair value adjustments related to the underlying debt equally offset the amounts recognized in interest expense.

(2) For 2015, includes $12.6 million and $2.7 million of losses for the three and six months ended June 30, 2015 on foreign currency derivatives which are substantially offset by gains from foreign currency remeasurement adjustments, also recognized in Other (income) expense.

(3) For 2015, includes $5.1 million of gains on foreign currency derivatives which are substantially offset by losses from foreign currency remeasurement adjustments on the AAE loan, also recognized in Other (income) expense.

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. We base the fair values of investment funds, which are accounted for under the cost method, on the best information available, which may include quoted investment fund values. We estimate the fair values of loans and fixed and floating rate debt using discounted cash flow analyses based on interest rates currently offered for loans with similar terms to borrowers of similar credit quality. The estimated fair values for these investments are classified in Level 2 of the fair value hierarchy because they are based on directly or indirectly observable inputs.

The following table shows the carrying amounts and fair values of our other financial instruments as of (in millions):

	June 30, 2015				December 31, 2014
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets
Investment funds	$	0.8	$	1.8	$	1.5	$	2.4
Loans	12.5		12.6		97.3		97.4
Liabilities
Recourse fixed rate debt	$	3,990.8	$	4,022.0	$	3,639.9	$	3,775.0
Recourse floating rate debt	217.3		216.5		540.0		540.0
Nonrecourse debt	11.5		11.9		15.9		16.6

Fair Value Disclosure

The following table shows the carrying amounts and fair values of our other financial instruments as of (in millions):

	June 30, 2015				December 31, 2014
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets
Investment funds	$	0.8	$	1.8	$	1.5	$	2.4
Loans	12.5		12.6		97.3		97.4
Liabilities
Recourse fixed rate debt	$	3,990.8	$	4,022.0	$	3,639.9	$	3,775.0
Recourse floating rate debt	217.3		216.5		540.0		540.0
Nonrecourse debt	11.5		11.9		15.9		16.6

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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Equity [Abstract]
Beginning Balance, Foreign Currency Translation Gain (Loss)	$ (69.9)	$ (21.9)
Change in Foreign Currency Translation Gain (Loss)	11.5	(48.0)
Foreign currency translation gain loss before reclassification adjustment into earnings	0.0	0.0
Foreign Currency Translation Gain (Loss), Income tax effect	0.0	0.0
Ending Balance, Foreign Currency Translation Gain (Loss)	(58.4)	(69.9)
Beginning Balance, Unrealized Gain (Loss) on Securities	0.3	0.3
Change in Unrealized Gain (Loss) on Securities	(0.2)	0.0
Unrealized Gain (Loss) on Securities, Reclassification adjustments into earnings	0.0	0.0
Unrealized Gain (Loss) on Securities, Income tax effect	0.1	0.0
Ending Balance, Unrealized Gain (Loss) on Securities	0.2	0.3
Beginning Balance, Unrealized Loss on Derivative Instruments	(21.7)	(19.1)
Change in Unrealized Loss on Derivative Instruments	(13.3)	6.0
Unrealized Loss on Derivative Instruments, Reclassification adjustments into earnings	14.1	(7.0)
Unrealized Loss on Derivative Instruments, Income tax effect	(0.7)	(1.6)
Ending Balance, Unrealized Loss on Derivative Instruments	(21.6)	(21.7)
Beginning Balance, Post-Retirement Benefit Plans	(105.6)	(107.7)
Change in Post-Retirement Benefit Plans	0.0	0.0
Post-Retirement Benefit Plans, Reclassification adjustments into earnings	3.5	3.3
Post-Retirement Benefit Plans, Income tax effect	(1.4)	(1.2)
Ending Balance, Post-Retirement Benefit Plans	(103.5)	(105.6)
Other Comprehensive Income Change in Component	(2.0)	(42.0)
Reclassification adjustments into earnings, Total	17.6	(3.7)
Income tax effect, Total	(2.0)	(2.8)
Accumulated other comprehensive income (loss), net of tax	$ (183.3)	$ (196.9)	$ (148.4)

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Fair Value Disclosure (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended		12 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Notional Amount		$ 550.0		$ 550.0		$ 600.0
Fair Value, Measurements, Recurring [Member]
Assets
Available for sale equity securities		4.2		4.2		4.4
Fair Value, Measurements, Recurring [Member] | Designated as Hedging Instrument [Member]
Assets
Interest rate derivatives	[1]	1.6		1.6		1.8
Liabilities
Interest rate derivatives	[1]					5.9
Foreign Currency Cash Flow Hedge Liability at Fair Value	[2]	4.2		4.2
Fair Value, Measurements, Recurring [Member] | Not Designated as Hedging Instrument [Member]
Assets
Foreign Currency Cash Flow Hedge Asset at Fair Value	[2]	7.8		7.8
Foreign exchange rate derivatives	[2]	1.6		1.6		9.7
Liabilities
Foreign exchange rate derivatives	[2]	2.5		2.5		1.6
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets
Available for sale equity securities		4.2		4.2		4.4
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Designated as Hedging Instrument [Member]
Assets
Interest rate derivatives	[1]	0.0		0.0		0.0
Liabilities
Interest rate derivatives	[1]					0.0
Foreign Currency Cash Flow Hedge Liability at Fair Value	[2]	0.0		0.0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Not Designated as Hedging Instrument [Member]
Assets
Foreign Currency Cash Flow Hedge Asset at Fair Value	[2]	0.0		0.0
Foreign exchange rate derivatives	[2]	0.0		0.0		0.0
Liabilities
Foreign exchange rate derivatives	[2]	0.0		0.0		0.0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Assets
Available for sale equity securities		0.0		0.0		0.0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Designated as Hedging Instrument [Member]
Assets
Interest rate derivatives	[1]	1.6		1.6		1.8
Liabilities
Interest rate derivatives	[1]					5.9
Foreign Currency Cash Flow Hedge Liability at Fair Value	[2]	4.2		4.2
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Not Designated as Hedging Instrument [Member]
Assets
Foreign Currency Cash Flow Hedge Asset at Fair Value	[2]	7.8		7.8
Foreign exchange rate derivatives	[2]	1.6		1.6		9.7
Liabilities
Foreign exchange rate derivatives	[2]	2.5		2.5		1.6
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Assets
Available for sale equity securities		0.0		0.0		0.0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Designated as Hedging Instrument [Member]
Assets
Interest rate derivatives	[1]	0.0		0.0		0.0
Liabilities
Interest rate derivatives	[1]					0.0
Foreign Currency Cash Flow Hedge Liability at Fair Value	[2]	0.0		0.0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Not Designated as Hedging Instrument [Member]
Assets
Foreign Currency Cash Flow Hedge Asset at Fair Value	[2]	0.0		0.0
Foreign exchange rate derivatives	[2]	0.0		0.0		0.0
Liabilities
Foreign exchange rate derivatives	[2]	$ 0.0		$ 0.0		$ 0.0
Fair Value Hedging [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Maturity Date Range of Derivative Instruments
Cash Flow Hedging [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Maturity Date Range of Derivative Instruments
Other Expense [Member] | Not Designated as Hedging Instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net		$ (1.6)	$ 0.9	$ (5.8)	$ 1.0
Other Expense [Member] | Cash Flow Hedging [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net		12.6	$ 0.0	4.2	$ 2.2
Other Expense [Member] | Foreign Currency Gain (Loss) [Member] | Cash Flow Hedging [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net		$ 12.6		$ 2.7

[1] (1) Designated as hedges

[2] (2) Not designated as hedges

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Variable Interest Entities (Details 1) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Carrying amounts and maximum exposure to loss with respect to VIEs
Net Carrying Amount	$ 153.7	$ 144.3
Maximum Exposure to Loss	153.7	144.3
Investments in Affiliates [Member]
Carrying amounts and maximum exposure to loss with respect to VIEs
Net Carrying Amount	153.4	143.9
Maximum Exposure to Loss	153.4	143.9
Other investment [Member]
Carrying amounts and maximum exposure to loss with respect to VIEs
Net Carrying Amount	0.3	0.4
Maximum Exposure to Loss	$ 0.3	$ 0.4

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Legal Proceedings and Other Contingencies (Details) - Viareggio [Member] $ in Millions	6 Months Ended
	Jun. 30, 2015 USD ($) case	Oct. 02, 2013 Insurance_Provider	Dec. 14, 2012 Employee Corporations	Jun. 29, 2009 Car
Loss Contingencies [Line Items]
Number of casualties				32
Number of subsidiaries			2
Number of Maintenance and Supervisory employees | Employee			10.0
Number of Italian railway companies | Corporations			4
Number of employees			18
Loss Contingency, Pending Claims, Number	90
Number of insurers | Insurance_Provider		3
Court Proceedings | case	1
Legal Fees | $	$ 9.6
Percentage of coverage held by Liberty Mutual Insurance Europe Limited		25.00%
Derailed [Member]
Loss Contingencies [Line Items]
number of railcars				14
Overturned [Member]
Loss Contingencies [Line Items]
number of railcars				5
Punctured and Ignited [Member]
Loss Contingencies [Line Items]
number of railcars				1

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Fair Value Disclosure (Details 2) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Interest Expense [Member] | Fair Value Hedging [Member]
Impact of GATX's Derivative Instrument on Income Statement and Other comprehensive income (loss)
Interest expense	[1]	$ 1.4	$ (0.5)	$ (0.9)	$ 1.6
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		1.4	1.2	2.7	2.4
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)		10.9	1.4	2.5	3.2
Operating 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		0.1	0.3	0.2	0.5
Other Expense [Member] | Cash Flow Hedges [Member]
Impact of GATX's Derivative Instrument on Income Statement and Other comprehensive income (loss)
Other expense		12.6	0.0	4.2	2.2
Not Designated as Hedging Instrument [Member] | Other Expense [Member]
Impact of GATX's Derivative Instrument on Income Statement and Other comprehensive income (loss)
Other expense		(1.6)	$ 0.9	(5.8)	$ 1.0
Not Designated as Hedging Instrument [Member] | Other Expense [Member] | Aae Cargo Ag [Member]
Impact of GATX's Derivative Instrument on Income Statement and Other comprehensive income (loss)
Other expense		5.1
Foreign Currency Gain (Loss) [Member] | Other Expense [Member] | Cash Flow Hedges [Member]
Impact of GATX's Derivative Instrument on Income Statement and Other comprehensive income (loss)
Other expense		$ 12.6		$ 2.7

[1] (1) The fair value adjustments related to the underlying debt equally offset the amounts recognized in interest expense.

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Fair Value Disclosure (Details 3) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Assets
Loans	$ 12.5	$ 97.3
Carrying Amount [Member]
Assets
Investment Funds	0.8	1.5
Loans	12.5	97.3
Liabilities
Recourse fixed rate debt	3,990.8	3,639.9
Recourse floating rate debt	217.3	540.0
Nonrecourse debt	11.5	15.9
Fair Value [Member]
Assets
Investment Funds	1.8	2.4
Loans	12.6	97.4
Liabilities
Recourse fixed rate debt	4,022.0	3,775.0
Recourse floating rate debt	216.5	540.0
Nonrecourse debt	$ 11.9	$ 16.6

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Variable Interest Entities

6 Months Ended

Jun. 30, 2015

Variable Interest Entity, Not Primary Beneficiary, Disclosures [Abstract]

Variable Interest Entities

Variable Interest Entities

We are the primary beneficiary of one of our variable interest entities, a structured lease financing of a portfolio of railcars, because we have the power to direct its significant activities. As a result, we consolidate this variable interest entity. The risks associated with it are similar to those of our wholly owned railcar leasing activities.

The following table shows the carrying amounts of assets and liabilities of the consolidated variable interest entity (in millions):

	June 30 2015		December 31 2014
Operating assets, net of accumulated depreciation (1)	$	85.6	$	88.1
Nonrecourse debt	11.5		15.9

_________

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

We determined that we are not the primary beneficiary of our other variable interest entities, which are primarily investments in equipment leasing affiliates that were financed through a variety of equity investments and third party lending arrangements. We are not the primary beneficiary of these variable interest entities because we do not have the power to direct the activities that most significantly impact the entities’ economic performance. For investments in affiliates we determined were variable interest entities, we concluded that power was shared by the affiliate partners based on the terms of the relevant joint venture agreements, which require approval of all partners for significant decisions regarding the variable interest entity.

The following table shows the carrying amounts and maximum exposure to loss for our unconsolidated variable interest entities (in millions):

	June 30, 2015				December 31, 2014
	Net Carrying Amount		Maximum Exposure to Loss		Net Carrying Amount		Maximum Exposure to Loss
Investments in affiliates	$	153.4	$	153.4	$	143.9	$	143.9
Other investment	0.3		0.3		0.4		0.4
Total	$	153.7	$	153.7	$	144.3	$	144.3

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Fair Value Disclosure (Details Textual) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2015 USD ($) Instrument	Jun. 30, 2015 USD ($) Instrument	Dec. 31, 2014 USD ($) Instrument
Fair Value Disclosure (Textual) [Abstract]
Derivative Asset, Notional Amount	$ 550.0	$ 550.0	$ 600.0
Derivative, Notional Amount	346.2	346.2	$ 281.5
Cash Flow Hedge Pre Tax Gain Loss to be Reclassified within Twelve Months		(5.7)
Expected After tax reclassification of net losses from accumulated other comprehensive income to earnings in Next Twelve Months		3.6
Aggregate fair value of all derivative instruments with Net liability position	$ 4.2	$ 4.2
Fair Value Hedging [Member]
Fair Value Disclosure (Textual) [Abstract]
Number of instruments, outstanding | Instrument	8	8
Maturity Date Range of Derivative Instruments
Cash Flow Hedges [Member]
Fair Value Disclosure (Textual) [Abstract]
Number of instruments, outstanding | Instrument	7	7	7
Maturity Date Range of Derivative Instruments

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Commercial Commitments (Details) - USD ($) $ in Millions		Jun. 30, 2015	Dec. 31, 2014
Guarantor Obligations [Line Items]
Total commercial commitments	[1]	$ 34.4	$ 37.6
Lease payment guarantees [Member]
Guarantor Obligations [Line Items]
Total commercial commitments		25.4	28.5
Standby letters of credit [Member]
Guarantor Obligations [Line Items]
Total commercial commitments		8.6	8.7
Performance bonds [Member]
Guarantor Obligations [Line Items]
Total commercial commitments		$ 0.4	$ 0.4

[1] (1) The carrying value of liabilities on the balance sheet for commercial commitments was $4.6 million at June 30, 2015 and $5.1 million at December 31, 2014. The expirations of these commitments range from 2017 to 2023. We are not aware of any event that would require us to satisfy any of our commitments.

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Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Assets
Cash and Cash Equivalents	$ 58.6	$ 209.9
Restricted Cash	13.3	14.5
Receivables
Rent and other receivables	76.3	86.0
Loans	12.5	97.3
Finance leases	177.9	174.7
Less: allowance for losses	(6.0)	(5.7)
Receivables, net	260.7	352.3
Operating Assets and Facilities
Operating Assets and Facilities ($123.0 and $123.1 related to a consolidated VIE)	8,341.3	8,143.5
Less: allowance for depreciation ($37.4 and $35.0 related to a consolidated VIE)	(2,506.9)	(2,455.5)
Operating assets and facilities, net	5,834.4	5,688.0
Investments in Affiliated Companies	368.7	357.7
Goodwill	81.2	86.1
Other Assets	243.1	229.0
Total Assets	6,860.0	6,937.5
Liabilities and Shareholders’ Equity
Accounts Payable and Accrued Expenses	171.3	165.9
Debt
Commercial paper and borrowings under bank credit facilities	3.8	72.1
Recourse	4,208.1	4,179.9
Nonrecourse ($11.5 and $15.9 related to a consolidated VIE)	(11.5)	(15.9)
Capital lease obligations	5.0	6.3
Total Debt	4,228.4	4,274.2
Deferred Income Taxes	974.5	937.3
Other Liabilities	200.4	246.1
Total Liabilities	5,574.6	5,623.5
Shareholders’ Equity
Common stock, $0.625 par value: Authorized shares — 120,000,000 Issued shares — 66,727,318 and 66,600,984 Outstanding shares — 43,218,915 and 44,198,850	(41.5)	(41.4)
Additional paid in capital	(673.8)	(672.8)
Retained earnings	1,574.9	1,501.7
Accumulated other comprehensive loss	183.3	148.4
Treasury stock at cost (23,508,403 and 22,402,134 shares)	(821.5)	(753.5)
Total Shareholders’ Equity	1,285.4	1,314.0
Total Liabilities and Shareholders’ Equity	$ 6,860.0	$ 6,937.5

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Financial Data of Business Segments (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) Segment	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Segment Reporting Information [Line Items]
Lease Income	$ 280.6	$ 274.3	$ 558.9	$ 524.9
Cargo and Freight Revenue	66.0	72.2	90.2	89.9
Provision for Income Taxes, Equity Method Investment	3.0	5.4	$ 6.0	9.6
Number of business segments | Segment			4
Profitability
Other revenue	18.7	19.3	$ 35.9	37.6
Maintenance expense	80.2	84.0	158.5	157.1
Depreciation expense	74.4	71.1	142.9	129.8
Marine operating expense	47.3	54.6	66.2	69.6
Operating lease expense	22.4	27.3	43.1	54.2
Other operating expense	7.8	6.7	15.1	13.3
Total Expenses	232.1	243.7	425.8	424.0
Disposition gains on owned assets	5.1	18.8	43.0	40.4
Residual sharing income	1.6	5.0	3.4	6.8
Nonremarketing disposition gains	2.0	4.4	7.7	9.4
Asset impairment	0.0	0.0	(0.1)	(0.3)
Net gain on asset dispositions	8.7	28.2	54.0	56.3
Interest expense, net	(38.5)	(39.5)	(79.4)	(81.5)
Other (expense) income	(1.6)	(4.9)	(5.6)	(8.3)
Share of affiliates' earnings (pre-tax)	12.0	17.7	23.5	31.8
Segment profit (loss)	113.8	123.6	251.7	226.7
SG&A	44.6	44.9	90.3	87.6
Income tax benefit	20.8	20.2	47.8	34.3
Net Income	45.4	53.1	107.6	95.2
Revenues	365.3	365.8	685.0	652.4
Selected Balance Sheet Data
Portfolio Investments and Capital Additions	175.3	209.6	356.2	655.1
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	368.7		368.7		$ 357.7
Identifiable assets	6,860.0		6,860.0		6,937.5
Rail North America [Member]
Segment Reporting Information [Line Items]
Lease Income	230.9	218.2	459.4	413.1
Cargo and Freight Revenue	0.0	0.0	$ 0.0	0.0
Leverage level expressed as a ratio of recourse debt to equity			5
Profitability
Other revenue	16.8	16.1	$ 31.5	30.7
Maintenance expense	63.8	65.1	133.0	126.5
Depreciation expense	53.3	49.1	105.6	90.6
Marine operating expense	0.0	0.0	0.0	0.0
Operating lease expense	20.7	25.7	41.4	52.6
Other operating expense	5.8	5.2	11.3	10.0
Total Expenses	143.6	145.1	291.3	279.7
Disposition gains on owned assets	5.0	17.7	40.9	39.3
Residual sharing income	0.2	3.8	0.4	4.4
Nonremarketing disposition gains	0.9	2.4	1.6	5.0
Asset impairment	0.0	0.0	0.0	0.0
Net gain on asset dispositions	6.1	23.9	42.9	48.7
Interest expense, net	(24.6)	(25.3)	(49.1)	(49.9)
Other (expense) income	(0.8)	(0.3)	(3.0)	(3.7)
Share of affiliates' earnings (pre-tax)	0.1	4.2	0.3	7.5
Segment profit (loss)	84.9	91.7	190.7	166.7
Revenues	247.7	234.3	490.9	443.8
Selected Balance Sheet Data
Portfolio Investments and Capital Additions	135.2	145.8	265.0	541.8
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	13.4		13.4		17.2
Identifiable assets	4,560.4		4,560.4		4,358.3
Rail International [Member]
Segment Reporting Information [Line Items]
Lease Income	42.4	47.7	84.5	94.9
Cargo and Freight Revenue	0.0	0.0	$ 0.0	0.0
Leverage level expressed as a ratio of recourse debt to equity			2
Profitability
Other revenue	1.7	2.4	$ 3.6	4.4
Maintenance expense	9.4	11.6	18.3	23.1
Depreciation expense	10.8	11.8	21.5	23.5
Marine operating expense	0.0	0.0	0.0	0.0
Operating lease expense	0.1	0.0	0.1	0.0
Other operating expense	1.5	1.0	2.4	2.4
Total Expenses	21.8	24.4	42.3	49.0
Disposition gains on owned assets	0.0	0.6	0.0	0.6
Residual sharing income	0.0	0.0	0.0	0.0
Nonremarketing disposition gains	1.1	2.0	6.1	4.4
Asset impairment	0.0	0.0	(0.1)	0.0
Net gain on asset dispositions	1.1	2.6	6.0	5.0
Interest expense, net	(3.0)	(6.2)	(9.5)	(12.4)
Other (expense) income	(1.2)	(2.7)	(1.2)	(2.7)
Share of affiliates' earnings (pre-tax)	(0.1)	0.0	(0.2)	(0.1)
Segment profit (loss)	19.1	19.4	40.9	40.1
Revenues	44.1	50.1	88.1	99.3
Selected Balance Sheet Data
Portfolio Investments and Capital Additions	27.8	42.3	69.2	81.6
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	1.6		1.6		1.8
Identifiable assets	1,104.9		1,104.9		1,229.4
ASC [Member]
Segment Reporting Information [Line Items]
Lease Income	1.0	1.0	2.0	2.1
Cargo and Freight Revenue	51.0	59.4	$ 58.0	62.5
Leverage level expressed as a ratio of recourse debt to equity			1.5
Profitability
Other revenue	0.0	0.0	$ 0.0	0.0
Maintenance expense	7.0	7.3	7.2	7.5
Depreciation expense	4.9	4.4	4.9	4.4
Marine operating expense	34.1	42.3	41.0	45.7
Operating lease expense	1.7	1.7	1.7	1.7
Other operating expense	0.0	0.0	0.0	0.0
Total Expenses	47.7	55.7	54.8	59.3
Disposition gains on owned assets	0.0	0.0	0.0	0.0
Residual sharing income	0.0	0.0	0.0	0.0
Nonremarketing disposition gains	0.0	0.0	0.0	0.0
Asset impairment	0.0	0.0	0.0	(0.4)
Net gain on asset dispositions	0.0	0.0	0.0	(0.4)
Interest expense, net	(1.3)	(1.4)	(2.6)	(2.8)
Other (expense) income	(0.1)	(0.2)	(0.1)	(0.2)
Share of affiliates' earnings (pre-tax)	0.0	0.0	0.0	0.0
Segment profit (loss)	2.9	3.1	2.5	1.9
Revenues	52.0	60.4	60.0	64.6
Selected Balance Sheet Data
Portfolio Investments and Capital Additions	10.2	7.7	19.5	16.0
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	0.0		0.0		0.0
Identifiable assets	307.8		307.8		286.7
Portfolio Management [Member]
Segment Reporting Information [Line Items]
Lease Income	6.3	7.4	13.0	14.8
Cargo and Freight Revenue	15.0	12.8	$ 32.2	27.4
Leverage level expressed as a ratio of recourse debt to equity			3
Profitability
Other revenue	0.2	0.8	$ 0.8	2.5
Maintenance expense	0.0	0.0	0.0	0.0
Depreciation expense	5.4	5.8	10.9	11.3
Marine operating expense	13.2	12.3	25.2	23.9
Operating lease expense	0.0	0.0	0.0	0.0
Other operating expense	0.5	0.5	1.4	0.9
Total Expenses	19.1	18.6	37.5	36.1
Disposition gains on owned assets	0.1	0.5	2.1	0.5
Residual sharing income	1.4	1.2	3.0	2.4
Nonremarketing disposition gains	0.0	0.0	0.0	0.0
Asset impairment	0.0	0.0	0.0	0.1
Net gain on asset dispositions	1.5	1.7	5.1	3.0
Interest expense, net	(5.6)	(6.1)	(10.8)	(12.9)
Other (expense) income	0.0	0.0	0.0	0.3
Share of affiliates' earnings (pre-tax)	12.0	13.5	23.4	24.4
Segment profit (loss)	10.3	11.5	26.2	23.4
Revenues	21.5	21.0	46.0	44.7
Selected Balance Sheet Data
Portfolio Investments and Capital Additions	0.3	12.0	0.3	12.0
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	353.7		353.7		338.7
Identifiable assets	796.5		796.5		813.3
Other [Member]
Segment Reporting Information [Line Items]
Lease Income	0.0	0.0	0.0	0.0
Cargo and Freight Revenue	0.0	0.0	0.0	0.0
Profitability
Other revenue	0.0	0.0	0.0	0.0
Maintenance expense	0.0	0.0	0.0	0.0
Depreciation expense	0.0	0.0	0.0	0.0
Marine operating expense	0.0	0.0	0.0	0.0
Operating lease expense	(0.1)	(0.1)	(0.1)	(0.1)
Other operating expense	0.0	0.0	0.0	0.0
Total Expenses	(0.1)	(0.1)	(0.1)	(0.1)
Disposition gains on owned assets	0.0	0.0	0.0	0.0
Residual sharing income	0.0	0.0	0.0	0.0
Nonremarketing disposition gains	0.0	0.0	0.0	0.0
Asset impairment	0.0	0.0	0.0	0.0
Net gain on asset dispositions	0.0	0.0	0.0	0.0
Interest expense, net	(4.0)	(0.5)	(7.4)	(3.5)
Other (expense) income	0.5	(1.7)	(1.3)	(2.0)
Share of affiliates' earnings (pre-tax)	0.0	0.0	0.0	0.0
Segment profit (loss)	(3.4)	(2.1)	(8.6)	(5.4)
Revenues	0.0	0.0	0.0	0.0
Selected Balance Sheet Data
Portfolio Investments and Capital Additions	1.8	1.8	2.2	3.7
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	0.0		0.0		0.0
Identifiable assets	90.4		90.4		$ 249.8
Parent [Member]
Profitability
Income tax benefit	$ 23.8	$ 25.6	$ 53.8	$ 43.9

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Description of Business

6 Months Ended

Jun. 30, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Description of Business

Description of Business

As used herein, "GATX," "we," "us," "our," and similar terms refer to GATX Corporation and its subsidiaries, unless indicated otherwise.

We lease, operate, manage, and remarket long-lived, widely-used assets, primarily in the rail and marine markets. We also invest in joint ventures that complement our existing business activities. We report our financial results through fourprimary business segments: Rail North America, Rail International, American Steamship Company (“ASC”), and Portfolio Management.

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Share Based Compensation - Weighted Average and Assumptions (Details) - Jun. 30, 2015 - $ / shares	Total
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Estimated fair value	$ 18.16
Quarterly dividend rate	$ 0.38
Risk-free interest rate	1.20%
Dividend yield	2.60%
Expected stock price volatility	29.20%
Present value of dividends	$ 6.90

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Commercial Commitments (Tables)

6 Months Ended

Jun. 30, 2015

Guarantees [Abstract]

Commercial Commitments

The following table shows our commercial commitments (in millions):

	June 30 2015		December 31 2014
Lease payment guarantees	$	25.4	$	28.5
Standby letters of credit	8.6		8.7
Performance bonds	0.4		0.4
Total commercial commitments (1)	$	34.4	$	37.6

_________

(1) The carrying value of liabilities on the balance sheet for commercial commitments was $4.6 million at June 30, 2015 and $5.1 million at December 31, 2014. The expirations of these commitments range from 2017 to 2023. We are not aware of any event that would require us to satisfy any of our commitments.

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Income Taxes (Details Textual) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Income Tax Disclosure [Abstract]
Unrecognized Tax Benefits	$ 5.6
Effective Income Tax Rate Reconciliation, Percent	35.00%	32.00%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 5.6
Decrease in Income Tax Expenses Unrecognized Tax Benefits if Recognized Net of Federal Tax	$ 3.6

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Accumulated Other Comprehensive Income (Loss) (Tables)

6 Months Ended

Jun. 30, 2015

Equity [Abstract]

Accumulated other comprehensive income (loss)

The following table shows the change in components for accumulated other comprehensive loss (in millions):

	Foreign Currency Translation Gain (Loss)			Unrealized Gain (Loss) on Securities			Unrealized Gain (Loss) on Derivative Instruments			Post-Retirement Benefit Plans			Total
Balance at December 31, 2014	$	(21.9	)	$	0.3		$	(19.1	)	$	(107.7	)	$	(148.4	)
Change in component	(48.0		)	—			6.0			—			(42.0		)
Reclassification adjustments into earnings	—			—			(7.0		)	3.3			(3.7		)
Income tax effect	—			—			(1.6		)	(1.2		)	(2.8		)
Balance at March 31, 2015	$	(69.9	)	$	0.3		$	(21.7	)	$	(105.6	)	$	(196.9	)
Change in component	11.5			(0.2		)	(13.3		)	—			(2.0		)
Reclassification adjustments into earnings	—			—			14.1			3.5			17.6
Income tax effect	—			0.1			(0.7		)	(1.4		)	(2.0		)
Balance at June 30, 2015	$	(58.4	)	$	0.2		$	(21.6	)	$	(103.5	)	$	(183.3	)

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Basis of Presentation Basis of Presentation (Notes)

6 Months Ended

Jun. 30, 2015

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

We prepared the accompanying unaudited consolidated financial statements in accordance with US Generally Accepted Accounting Principles ("GAAP") for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, our unaudited consolidated financial statements do not include all of the information and footnotes required for complete financial statements. We have included all of the normal recurring adjustments that we deemed necessary for a fair presentation.

Operating results for the six months endedJune 30, 2015, are not necessarily indicative of the results we may achieve for the entire year ending December 31, 2015. In particular, ASC's fleet is inactive for a significant portion of the first quarter of each year due to winter conditions on the Great Lakes. In addition, asset remarketing income does not occur evenly throughout the year. For more information, refer to the consolidated financial statements and footnotes in our Annual Report on Form 10-K for the year ended December 31, 2014.

Accounting Changes

Discontinued Operations

In April 2014, the Financial Accounting Standards Board ("FASB") issued amendments to authoritative guidance for reporting discontinued operations and disposals of components of an entity. The amendments require that disposals representing strategic shifts that have (or will have) a major effect on an entity’s operations or financial results should be reported as discontinued operations. The amendments also expand the disclosure requirements for both discontinued operations and significant dispositions that do not qualify as discontinued operations.

The amendments were effective for us beginning in the first quarter of 2015. Adoption of the new guidance did not impact the amount or timing of net income or the presentation and disclosures of our financial statements.

New Accounting Pronouncements

Debt Issue Costs

In April 2015, the FASB issued authoritative guidance that requires presentation of debt issue costs as a deduction from the carrying amount of the related debt liability on the balance sheet, rather than as a deferred charge. The new guidance is effective for us beginning in the first quarter of 2016, with early adoption permitted. Adoption of the new guidance is not expected to impact the amount or timing of net income but may result in changes to the presentation and disclosures of our financial statements.

Consolidation

In February 2015, the FASB issued authoritative guidance amending the analysis required to determine whether to consolidate certain types of legal entities such as limited partnerships, limited liability corporations, and certain securitization structures. The new guidance is effective for us beginning in the first quarter of 2016, with early adoption permitted. We are currently evaluating the effect, if any, the new guidance will have on our financial statements and related disclosures.

Revenue from Contracts with Customers

In May 2014, the FASB issued authoritative accounting guidance that supersedes most current revenue recognition guidance, including industry-specific guidance. The new guidance requires companies to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration it expects to be entitled to in exchange for those goods or services.

In July 2015, the FASB deferred the effective date of this standard from the first quarter of 2017 to the first quarter of 2018. Early adoption is permitted as of the original effective date. We can adopt the new guidance using either the retrospective method or the cumulative effect transition method. We are still evaluating the effect that the new guidance will have on our consolidated financial statements and related disclosures, including which transition method we will use and when we will choose to adopt this standard.

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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Operating Assets and Facilities ($123.2 and $123.3 related to a consolidated VIE)	$ 8,341.3	$ 8,143.5
Less: allowance for depreciation ($37.4 and $35.0 related to a consolidated VIE)	(2,506.9)	(2,455.5)
Nonrecourse ($11.5 and $15.9 related to a consolidated VIE)	$ (11.5)	$ (15.9)
Common stock, par value	$ 0.625	$ 0.625
Common stock, shares authorized	120,000,000	120,000,000
Common stock, shares issued	66,727,318	66,600,984
Common stock, shares outstanding	43,218,915	44,198,850
Treasury stock, shares outstanding	23,508,403	22,402,134
Variable Interest Entity, Primary Beneficiary [Member]
Operating Assets and Facilities ($123.2 and $123.3 related to a consolidated VIE)	$ 123.0	$ 123.1
Less: allowance for depreciation ($37.4 and $35.0 related to a consolidated VIE)	(37.4)	(35.0)
Nonrecourse ($11.5 and $15.9 related to a consolidated VIE)	$ (11.5)	$ (15.9)

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Financial Data of Business Segments

6 Months Ended

Jun. 30, 2015

Segment Reporting Information [Line Items]

Segment Reporting Disclosure [Text Block]

Financial Data of Business Segments

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

We lease, operate, manage, and remarket long-lived, widely-used assets, primarily in the rail and marine markets. We also invest in joint ventures that complement our existing business activities. We report our financial results through fourprimary business segments: Rail North America, Rail International, ASC, and Portfolio Management.

Rail North America comprises our wholly owned operations in the United States, Canada, and Mexico, as well as an affiliate investment. 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 comprises our wholly owned European operations ("GATX Rail Europe" or "GRE"), a railcar leasing business in India ("GATX India Pte. Ltd." or "GIPL"), and a recently established railcar leasing business in Russia ("GATX Rail Vostok LLC" or "GRV"), as well as one development stage affiliate in China. GRE leases railcars 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 US-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 generates leasing, marine operating, asset remarketing and management fee income through a collection of diversified wholly owned assets and joint venture 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, pretax 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.

We allocate debt balances and related interest expense to each segment based upon a predetermined fixed recourse leverage level expressed as a ratio of recourse debt (including off-balance-sheet debt) to equity. The leverage levels are 5:1 for Rail North America, 2:1 for Rail International, 1.5:1 for ASC, and 3:1 for Portfolio Management. We believe that by using this leverage and interest expense allocation methodology, each operating segment’s financial performance reflects appropriate risk-adjusted borrowing costs.

The following tables show certain segment data for each of our business segments (in millions):

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
Three Months Ended June 30, 2015
Profitability
Revenues
Lease revenue	$	230.9		$	42.4		$	1.0		$	6.3		$	—		$	280.6
Marine operating revenue	—			—			51.0			15.0			—			66.0
Other revenue	16.8			1.7			—			0.2			—			18.7
Total Revenues	247.7			44.1			52.0			21.5			—			365.3
Expenses
Maintenance expense	63.8			9.4			7.0			—			—			80.2
Marine operating expense	—			—			34.1			13.2			—			47.3
Depreciation expense	53.3			10.8			4.9			5.4			—			74.4
Operating lease expense	20.7			0.1			1.7			—			(0.1		)	22.4
Other operating expense	5.8			1.5			—			0.5			—			7.8
Total Expenses	143.6			21.8			47.7			19.1			(0.1		)	232.1
Other Income (Expense)
Net gain on asset dispositions	6.1			1.1			—			1.5			—			8.7
Interest expense, net	(24.6		)	(3.0		)	(1.3		)	(5.6		)	(4.0		)	(38.5		)
Other (expense) income	(0.8		)	(1.2		)	(0.1		)	—			0.5			(1.6		)
Share of affiliates' earnings (pretax)	0.1			(0.1		)	—			12.0			—			12.0
Segment Profit (Loss)	$	84.9		$	19.1		$	2.9		$	10.3		$	(3.4	)	113.8
Selling, general and administrative expense																44.6
Income taxes (including $3.0 related to affiliates' earnings)																23.8
Net Income																$	45.4
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	$	5.0		$	—		$	—		$	0.1		$	—		$	5.1
Residual sharing income	0.2			—			—			1.4			—			1.6
Non-remarketing disposition gains (1)	0.9			1.1			—			—			—			2.0
Asset impairment	—			—			—			—			—			—
	$	6.1		$	1.1		$	—		$	1.5		$	—		$	8.7
Capital Expenditures
Portfolio investments and capital additions	$	135.2		$	27.8		$	10.2		$	0.3		$	1.8		$	175.3
Selected Balance Sheet Data at June 30, 2015
Investments in affiliated companies	$	13.4		$	1.6		$	—		$	353.7		$	—		$	368.7
Identifiable assets	$	4,560.4		$	1,104.9		$	307.8		$	796.5		$	90.4		$	6,860.0

_____

(1) Includes scrapping gains.

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
Three Months Ended June 30, 2014
Profitability
Revenues
Lease revenue	$	218.2		$	47.7		$	1.0		$	7.4		$	—		$	274.3
Marine operating revenue	—			—			59.4			12.8			—			72.2
Other revenue	16.1			2.4			—			0.8			—			19.3
Total Revenues	234.3			50.1			60.4			21.0			—			365.8
Expenses
Maintenance expense	65.1			11.6			7.3			—			—			84.0
Marine operating expense	—			—			42.3			12.3			—			54.6
Depreciation expense	49.1			11.8			4.4			5.8			—			71.1
Operating lease expense	25.7			—			1.7			—			(0.1		)	27.3
Other operating expense	5.2			1.0			—			0.5			—			6.7
Total Expenses	145.1			24.4			55.7			18.6			(0.1		)	243.7
Other Income (Expense)
Net gain on asset dispositions	23.9			2.6			—			1.7			—			28.2
Interest expense, net	(25.3		)	(6.2		)	(1.4		)	(6.1		)	(0.5		)	(39.5		)
Other expense	(0.3		)	(2.7		)	(0.2		)	—			(1.7		)	(4.9		)
Share of affiliates' earnings (pretax)	4.2			—			—			13.5			—			17.7
Segment Profit (Loss)	$	91.7		$	19.4		$	3.1		$	11.5		$	(2.1	)	123.6
Selling, general and administrative expense																44.9
Income taxes (including $5.4 related to affiliates' earnings)																25.6
Net Income																$	53.1
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	$	17.7		$	0.6		$	—		$	0.5		$	—		$	18.8
Residual sharing income	3.8			—			—			1.2			—			5.0
Non-remarketing disposition gains (1)	2.4			2.0			—			—			—			4.4
Asset impairment	—			—			—			—			—			—
	$	23.9		$	2.6		$	—		$	1.7		$	—		$	28.2
Capital Expenditures
Portfolio investments and capital additions	$	145.8		$	42.3		$	7.7		$	12.0		$	1.8		$	209.6
Selected Balance Sheet Data at December 31, 2014
Investments in affiliated companies	$	17.2		$	1.8		$	—		$	338.7		$	—		$	357.7
Identifiable assets	$	4,358.3		$	1,229.4		$	286.7		$	813.3		$	249.8		$	6,937.5

_____

(1) Includes scrapping gains.

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
Six Months Ended June 30, 2015
Profitability
Revenues
Lease revenue	$	459.4		$	84.5		$	2.0		$	13.0		$	—		$	558.9
Marine operating revenue	—			—			58.0			32.2			—			90.2
Other revenue	31.5			3.6			—			0.8			—			35.9
Total Revenues	490.9			88.1			60.0			46.0			—			685.0
Expenses
Maintenance expense	133.0			18.3			7.2			—			—			158.5
Marine operating expense	—			—			41.0			25.2			—			66.2
Depreciation expense	105.6			21.5			4.9			10.9			—			142.9
Operating lease expense	41.4			0.1			1.7			—			(0.1		)	43.1
Other operating expense	11.3			2.4			—			1.4			—			15.1
Total Expenses	291.3			42.3			54.8			37.5			(0.1		)	425.8
Other Income (Expense)
Net gain on asset dispositions	42.9			6.0			—			5.1			—			54.0
Interest expense, net	(49.1		)	(9.5		)	(2.6		)	(10.8		)	(7.4		)	(79.4		)
Other expense	(3.0		)	(1.2		)	(0.1		)	—			(1.3		)	(5.6		)
Share of affiliates' earnings (pretax)	0.3			(0.2		)	—			23.4			—			23.5
Segment Profit (Loss)	$	190.7		$	40.9		$	2.5		$	26.2		$	(8.6	)	251.7
Selling, general and administrative expense																90.3
Income taxes (including $6.0 related to affiliates' earnings)																53.8
Net Income																$	107.6
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	$	40.9		$	—		$	—		$	2.1		$	—		$	43.0
Residual sharing income	0.4			—			—			3.0			—			3.4
Non-remarketing disposition gains (1)	1.6			6.1			—			—			—			7.7
Asset impairment	—			(0.1		)	—			—			—			(0.1		)
	$	42.9		$	6.0		$	—		$	5.1		$	—		$	54.0
Capital Expenditures
Portfolio investments and capital additions	$	265.0		$	69.2		$	19.5		$	0.3		$	2.2		$	356.2

_____

(1) Includes scrapping gains.

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
Six Months Ended June 30, 2014
Profitability
Revenues
Lease revenue	$	413.1		$	94.9		$	2.1		$	14.8		$	—		$	524.9
Marine operating revenue	—			—			62.5			27.4			—			89.9
Other revenue	30.7			4.4			—			2.5			—			37.6
Total Revenues	443.8			99.3			64.6			44.7			—			652.4
Expenses
Maintenance expense	126.5			23.1			7.5			—			—			157.1
Marine operating expense	—			—			45.7			23.9			—			69.6
Depreciation expense	90.6			23.5			4.4			11.3			—			129.8
Operating lease expense	52.6			—			1.7			—			(0.1		)	54.2
Other operating expense	10.0			2.4			—			0.9			—			13.3
Total Expenses	279.7			49.0			59.3			36.1			(0.1		)	424.0
Other Income (Expense)
Net gain on asset dispositions	48.7			5.0			(0.4		)	3.0			—			56.3
Interest expense, net	(49.9		)	(12.4		)	(2.8		)	(12.9		)	(3.5		)	(81.5		)
Other (expense) income	(3.7		)	(2.7		)	(0.2		)	0.3			(2.0		)	(8.3		)
Share of affiliates' earnings (pretax)	7.5			(0.1		)	—			24.4			—			31.8
Segment Profit (Loss)	$	166.7		$	40.1		$	1.9		$	23.4		$	(5.4	)	226.7
Selling, general and administrative expense																87.6
Income taxes (including $9.6 related to affiliates' earnings)																43.9
Net Income																$	95.2
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	$	39.3		$	0.6		$	—		$	0.5		$	—		$	40.4
Residual sharing income	4.4			—			—			2.4			—			6.8
Non-remarketing disposition gains (1)	5.0			4.4			—			—			—			9.4
Asset impairment	—			—			(0.4		)	0.1			—			(0.3		)
	$	48.7		$	5.0		$	(0.4	)	$	3.0		$	—		$	56.3
Capital Expenditures
Portfolio investments and capital additions	$	541.8		$	81.6		$	16.0		$	12.0		$	3.7		$	655.1

_____

(1) Includes scrapping gains.

Financial Data of Business Segments

The following tables show certain segment data for each of our business segments (in millions):

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
Three Months Ended June 30, 2015
Profitability
Revenues
Lease revenue	$	230.9		$	42.4		$	1.0		$	6.3		$	—		$	280.6
Marine operating revenue	—			—			51.0			15.0			—			66.0
Other revenue	16.8			1.7			—			0.2			—			18.7
Total Revenues	247.7			44.1			52.0			21.5			—			365.3
Expenses
Maintenance expense	63.8			9.4			7.0			—			—			80.2
Marine operating expense	—			—			34.1			13.2			—			47.3
Depreciation expense	53.3			10.8			4.9			5.4			—			74.4
Operating lease expense	20.7			0.1			1.7			—			(0.1		)	22.4
Other operating expense	5.8			1.5			—			0.5			—			7.8
Total Expenses	143.6			21.8			47.7			19.1			(0.1		)	232.1
Other Income (Expense)
Net gain on asset dispositions	6.1			1.1			—			1.5			—			8.7
Interest expense, net	(24.6		)	(3.0		)	(1.3		)	(5.6		)	(4.0		)	(38.5		)
Other (expense) income	(0.8		)	(1.2		)	(0.1		)	—			0.5			(1.6		)
Share of affiliates' earnings (pretax)	0.1			(0.1		)	—			12.0			—			12.0
Segment Profit (Loss)	$	84.9		$	19.1		$	2.9		$	10.3		$	(3.4	)	113.8
Selling, general and administrative expense																44.6
Income taxes (including $3.0 related to affiliates' earnings)																23.8
Net Income																$	45.4
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	$	5.0		$	—		$	—		$	0.1		$	—		$	5.1
Residual sharing income	0.2			—			—			1.4			—			1.6
Non-remarketing disposition gains (1)	0.9			1.1			—			—			—			2.0
Asset impairment	—			—			—			—			—			—
	$	6.1		$	1.1		$	—		$	1.5		$	—		$	8.7
Capital Expenditures
Portfolio investments and capital additions	$	135.2		$	27.8		$	10.2		$	0.3		$	1.8		$	175.3
Selected Balance Sheet Data at June 30, 2015
Investments in affiliated companies	$	13.4		$	1.6		$	—		$	353.7		$	—		$	368.7
Identifiable assets	$	4,560.4		$	1,104.9		$	307.8		$	796.5		$	90.4		$	6,860.0

_____

(1) Includes scrapping gains.

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
Three Months Ended June 30, 2014
Profitability
Revenues
Lease revenue	$	218.2		$	47.7		$	1.0		$	7.4		$	—		$	274.3
Marine operating revenue	—			—			59.4			12.8			—			72.2
Other revenue	16.1			2.4			—			0.8			—			19.3
Total Revenues	234.3			50.1			60.4			21.0			—			365.8
Expenses
Maintenance expense	65.1			11.6			7.3			—			—			84.0
Marine operating expense	—			—			42.3			12.3			—			54.6
Depreciation expense	49.1			11.8			4.4			5.8			—			71.1
Operating lease expense	25.7			—			1.7			—			(0.1		)	27.3
Other operating expense	5.2			1.0			—			0.5			—			6.7
Total Expenses	145.1			24.4			55.7			18.6			(0.1		)	243.7
Other Income (Expense)
Net gain on asset dispositions	23.9			2.6			—			1.7			—			28.2
Interest expense, net	(25.3		)	(6.2		)	(1.4		)	(6.1		)	(0.5		)	(39.5		)
Other expense	(0.3		)	(2.7		)	(0.2		)	—			(1.7		)	(4.9		)
Share of affiliates' earnings (pretax)	4.2			—			—			13.5			—			17.7
Segment Profit (Loss)	$	91.7		$	19.4		$	3.1		$	11.5		$	(2.1	)	123.6
Selling, general and administrative expense																44.9
Income taxes (including $5.4 related to affiliates' earnings)																25.6
Net Income																$	53.1
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	$	17.7		$	0.6		$	—		$	0.5		$	—		$	18.8
Residual sharing income	3.8			—			—			1.2			—			5.0
Non-remarketing disposition gains (1)	2.4			2.0			—			—			—			4.4
Asset impairment	—			—			—			—			—			—
	$	23.9		$	2.6		$	—		$	1.7		$	—		$	28.2
Capital Expenditures
Portfolio investments and capital additions	$	145.8		$	42.3		$	7.7		$	12.0		$	1.8		$	209.6
Selected Balance Sheet Data at December 31, 2014
Investments in affiliated companies	$	17.2		$	1.8		$	—		$	338.7		$	—		$	357.7
Identifiable assets	$	4,358.3		$	1,229.4		$	286.7		$	813.3		$	249.8		$	6,937.5

_____

(1) Includes scrapping gains.

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
Six Months Ended June 30, 2015
Profitability
Revenues
Lease revenue	$	459.4		$	84.5		$	2.0		$	13.0		$	—		$	558.9
Marine operating revenue	—			—			58.0			32.2			—			90.2
Other revenue	31.5			3.6			—			0.8			—			35.9
Total Revenues	490.9			88.1			60.0			46.0			—			685.0
Expenses
Maintenance expense	133.0			18.3			7.2			—			—			158.5
Marine operating expense	—			—			41.0			25.2			—			66.2
Depreciation expense	105.6			21.5			4.9			10.9			—			142.9
Operating lease expense	41.4			0.1			1.7			—			(0.1		)	43.1
Other operating expense	11.3			2.4			—			1.4			—			15.1
Total Expenses	291.3			42.3			54.8			37.5			(0.1		)	425.8
Other Income (Expense)
Net gain on asset dispositions	42.9			6.0			—			5.1			—			54.0
Interest expense, net	(49.1		)	(9.5		)	(2.6		)	(10.8		)	(7.4		)	(79.4		)
Other expense	(3.0		)	(1.2		)	(0.1		)	—			(1.3		)	(5.6		)
Share of affiliates' earnings (pretax)	0.3			(0.2		)	—			23.4			—			23.5
Segment Profit (Loss)	$	190.7		$	40.9		$	2.5		$	26.2		$	(8.6	)	251.7
Selling, general and administrative expense																90.3
Income taxes (including $6.0 related to affiliates' earnings)																53.8
Net Income																$	107.6
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	$	40.9		$	—		$	—		$	2.1		$	—		$	43.0
Residual sharing income	0.4			—			—			3.0			—			3.4
Non-remarketing disposition gains (1)	1.6			6.1			—			—			—			7.7
Asset impairment	—			(0.1		)	—			—			—			(0.1		)
	$	42.9		$	6.0		$	—		$	5.1		$	—		$	54.0
Capital Expenditures
Portfolio investments and capital additions	$	265.0		$	69.2		$	19.5		$	0.3		$	2.2		$	356.2

_____

(1) Includes scrapping gains.

	Rail North America			Rail International			ASC			Portfolio Management			Other			GATX Consolidated
Six Months Ended June 30, 2014
Profitability
Revenues
Lease revenue	$	413.1		$	94.9		$	2.1		$	14.8		$	—		$	524.9
Marine operating revenue	—			—			62.5			27.4			—			89.9
Other revenue	30.7			4.4			—			2.5			—			37.6
Total Revenues	443.8			99.3			64.6			44.7			—			652.4
Expenses
Maintenance expense	126.5			23.1			7.5			—			—			157.1
Marine operating expense	—			—			45.7			23.9			—			69.6
Depreciation expense	90.6			23.5			4.4			11.3			—			129.8
Operating lease expense	52.6			—			1.7			—			(0.1		)	54.2
Other operating expense	10.0			2.4			—			0.9			—			13.3
Total Expenses	279.7			49.0			59.3			36.1			(0.1		)	424.0
Other Income (Expense)
Net gain on asset dispositions	48.7			5.0			(0.4		)	3.0			—			56.3
Interest expense, net	(49.9		)	(12.4		)	(2.8		)	(12.9		)	(3.5		)	(81.5		)
Other (expense) income	(3.7		)	(2.7		)	(0.2		)	0.3			(2.0		)	(8.3		)
Share of affiliates' earnings (pretax)	7.5			(0.1		)	—			24.4			—			31.8
Segment Profit (Loss)	$	166.7		$	40.1		$	1.9		$	23.4		$	(5.4	)	226.7
Selling, general and administrative expense																87.6
Income taxes (including $9.6 related to affiliates' earnings)																43.9
Net Income																$	95.2
Net Gain on Asset Dispositions
Asset Remarketing Income:
Disposition gains on owned assets	$	39.3		$	0.6		$	—		$	0.5		$	—		$	40.4
Residual sharing income	4.4			—			—			2.4			—			6.8
Non-remarketing disposition gains (1)	5.0			4.4			—			—			—			9.4
Asset impairment	—			—			(0.4		)	0.1			—			(0.3		)
	$	48.7		$	5.0		$	(0.4	)	$	3.0		$	—		$	56.3
Capital Expenditures
Portfolio investments and capital additions	$	541.8		$	81.6		$	16.0		$	12.0		$	3.7		$	655.1

XML

Document and Entity Information - Jun. 30, 2015 - shares shares in Millions	Total
Document and Entity Information [Abstract]
Entity Registrant Name	GATX Corporation
Entity Central Index Key	0000040211
Document Type	10-Q
Document Period End Date	Jun. 30, 2015
Amendment Flag	false
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q2
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 Common Stock, Shares Outstanding	43.2

XML

Variable Interest Entities (Tables)

6 Months Ended

Jun. 30, 2015

Variable Interest Entity, Not Primary Beneficiary, Disclosures [Abstract]

Carrying amounts of assets and liabilities of consolidated VIE

Variable Interest Entities

We are the primary beneficiary of one of our variable interest entities, a structured lease financing of a portfolio of railcars, because we have the power to direct its significant activities. As a result, we consolidate this variable interest entity. The risks associated with it are similar to those of our wholly owned railcar leasing activities.

The following table shows the carrying amounts of assets and liabilities of the consolidated variable interest entity (in millions):

	June 30 2015		December 31 2014
Operating assets, net of accumulated depreciation (1)	$	85.6	$	88.1
Nonrecourse debt	11.5		15.9

_________

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

We determined that we are not the primary beneficiary of our other variable interest entities, which are primarily investments in equipment leasing affiliates that were financed through a variety of equity investments and third party lending arrangements. We are not the primary beneficiary of these variable interest entities because we do not have the power to direct the activities that most significantly impact the entities’ economic performance. For investments in affiliates we determined were variable interest entities, we concluded that power was shared by the affiliate partners based on the terms of the relevant joint venture agreements, which require approval of all partners for significant decisions regarding the variable interest entity.

Carrying amounts and maximum exposure to loss for non consolidated VIEs

The following table shows the carrying amounts and maximum exposure to loss for our unconsolidated variable interest entities (in millions):

	June 30, 2015				December 31, 2014
	Net Carrying Amount		Maximum Exposure to Loss		Net Carrying Amount		Maximum Exposure to Loss
Investments in affiliates	$	153.4	$	153.4	$	143.9	$	143.9
Other investment	0.3		0.3		0.4		0.4
Total	$	153.7	$	153.7	$	144.3	$	144.3

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Consolidated Statements of Comprehensive Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenues
Lease revenue	$ 280.6	$ 274.3	$ 558.9	$ 524.9
Marine operating revenue	66.0	72.2	90.2	89.9
Other revenue	18.7	19.3	35.9	37.6
Total Revenues	365.3	365.8	685.0	652.4
Expenses
Maintenance expense	80.2	84.0	158.5	157.1
Marine operating expense	47.3	54.6	66.2	69.6
Depreciation expense	74.4	71.1	142.9	129.8
Operating lease expense	22.4	27.3	43.1	54.2
Other operating expense	7.8	6.7	15.1	13.3
Selling, general and administrative	44.6	44.9	90.3	87.6
Total Expenses	276.7	288.6	516.1	511.6
Other Income (Expense)
Net gain on asset dispositions	8.7	28.2	54.0	56.3
Interest expense, net	(38.5)	(39.5)	(79.4)	(81.5)
Other (expense) income	(1.6)	(4.9)	(5.6)	(8.3)
Income before Income Taxes and Share of Affiliates’ Earnings	57.2	61.0	137.9	107.3
Income Taxes	(20.8)	(20.2)	(47.8)	(34.3)
Share of Affiliates’ Earnings (net of tax)	9.0	12.3	17.5	22.2
Net Income	45.4	53.1	107.6	95.2
Other Comprehensive Income, net of taxes
Foreign currency translation adjustments	(11.5)	1.9	36.5	1.2
Unrealized gain (loss) on securities	0.1	(0.1)	0.1	0.1
Unrealized gain (loss) on derivative instruments	(0.1)	(0.8)	2.5	(1.5)
Post-retirement benefit plans	2.1	1.7	4.2	3.1
Other comprehensive income (loss)	13.6	0.7	(34.9)	3.3
Comprehensive Income	$ 59.0	$ 53.8	$ 72.7	$ 98.5
Share Data
Basic earnings per share (in dollars per share)	$ 1.04	$ 1.17	$ 2.46	$ 2.08
Average number of common shares (in shares)	43.5	45.5	43.8	45.7
Diluted earnings per share (in dollars per share)	$ 1.03	$ 1.15	$ 2.42	$ 2.05
Average number of common shares and common share equivalents (in shares)	44.2	46.3	44.5	46.5
Dividends declared per common share (in dollars per share)	$ 0.38	$ 0.33	$ 0.76	$ 0.66

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Income Taxes

6 Months Ended

Jun. 30, 2015

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

Our effective tax rate was 35% for the six months endedJune 30, 2015, compared to 32% for the six months endedJune 30, 2014. The difference in the effective rates for the prior year, compared to the statutory rate of 35%, is primarily attributable to the mix of pretax income among domestic and foreign jurisdictions which are taxed at different rates. The current year reflects a higher contribution from domestic source income, which is taxed at a higher rate, as well as the impact of an increase in the statutory tax rate in Alberta, Canada.

As of June 30, 2015, our gross liability for unrecognized tax benefits was $5.6 million. If fully recognized, these tax benefits would decrease our income tax expense by $5.6 million ($3.6 million, net of federal tax). We do not anticipate the recognition of any tax benefits that were previously unrecognized within the next 12 months.

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Share-Based Compensation

6 Months Ended

Jun. 30, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-Based Compensation

Share-Based Compensation

During the six months ended of 2015, we granted 341,800 stock appreciation rights (“SARs”), 65,850 restricted stock units, 61,740 performance shares, and 5,617 phantom stock units. For the three and six months ended June 30, 2015, total share-based compensation expense was $3.2 million and $6.1 million and the related tax benefits were $1.2 million and $2.3 million. For the three and six months ended June 30, 2014, total share-based compensation expense was $3.1 million and $6.2 million and the related tax benefits were $1.2 million and $2.3 million.

The estimated fair value of our 2015 SARs awards and related underlying assumptions are shown in the table below.

	2015
Estimated fair value	$	18.16
Quarterly dividend rate	$	0.38
Expected term of stock appreciation rights, in years	4.7
Risk-free interest rate	1.2		%
Dividend yield	2.6		%
Expected stock price volatility	29.2		%
Present value of dividends	$	6.90

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Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2015

Earnings Per Share [Abstract]

Computation of basic and diluted net income per common share

he following table shows the computation of our basic and diluted net income per common share (in millions, except per share amounts):

	Three Months Ended June 30				Six Months Ended June 30
	2015		2014		2015		2014
Numerator:
Net income	$	45.4	$	53.1	$	107.6	$	95.2
Denominator:
Weighted average shares outstanding - basic	43.5		45.5		43.8		45.7
Effect of dilutive securities:
Equity compensation plans	0.7		0.8		0.7		0.8
Weighted average shares outstanding - diluted	44.2		46.3		44.5		46.5
Basic earnings per share	$	1.04	$	1.17	$	2.46	$	2.08
Diluted earnings per share	$	1.03	$	1.15	$	2.42	$	2.05

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Fair Value Disclosure (Tables)

6 Months Ended

Jun. 30, 2015

Fair Value Disclosures [Abstract]

Fair Value Measurements, Recurring and Nonrecurring

The following tables show our assets and liabilities that are measured at fair value on a recurring basis (in millions):

Assets	June 30, 2015		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs    (Level 3)
Interest rate derivatives (1)	$	1.6	$	—	$	1.6	$	—
Foreign exchange rate derivatives (1)	7.8		—		7.8		—
Foreign exchange rate derivatives (2)	1.6		—		1.6		—
Available-for-sale equity securities	4.2		4.2		—		—
Liabilities
Foreign exchange rate derivatives (1)	4.2		—		4.2		—
Foreign exchange rate derivatives (2)	2.5		—		2.5		—

Assets	December 31, 2014		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Interest rate derivatives (1)	$	1.8	$	—	$	1.8	$	—
Foreign exchange rate derivatives (2)	9.7		—		9.7		—
Available-for-sale equity securities	4.4		4.4		—		—
Liabilities
Interest rate derivatives (1)	5.9		—		5.9		—
Foreign exchange rate derivatives (2)	1.6		—		1.6		—

_________

(1) Designated as hedges.

(2) Not designated as hedges.

We base our valuations of available-for-sale equity securities on their quoted prices on an active exchange. We value derivatives using a pricing model with inputs (such as yield curves and foreign currency rates) that are observable in the market or that can be derived principally from observable market data.

Derivative Instruments, Gain (Loss) [Table Text Block]

Derivative instruments

Fair Value Hedges

We use interest rate swaps to manage the fixed-to-floating rate mix of our debt obligations by converting the fixed rate debt to floating rate debt. For fair value hedges, we recognize changes in fair value of both the derivative and the hedged item as interest expense. We had eight instruments outstanding with an aggregate notional amount of $550.0 million as of June 30, 2015 that mature from 2017 to 2020, and eight instruments outstanding with an aggregate notional amount of $600.0 million as of December 31, 2014 that mature from 2015 to 2020.

Cash Flow Hedges

We use interest rate swaps to convert floating rate debt to fixed rate debt. We use Treasury rate locks to hedge our exposure to interest rate risk on anticipated transactions. We also use currency swaps to hedge our exposure to fluctuations in the exchange rates of the foreign currencies in which we conduct business. We had seven instruments outstanding with an aggregate notional amount of $346.2 million as of June 30, 2015, and seven instruments outstanding with an aggregate notional amount of $281.5 million as of December 31, 2014. These derivatives had maturities ranging from 2015 to 2022. Within the next 12 months, we expect to reclassify $5.7 million ($3.6 million after-tax) of net losses on previously terminated derivatives from accumulated other comprehensive loss. We reclassify these amounts when interest and operating lease expense on the related hedged transactions affect earnings.

Non-designated Derivatives

We do not hold derivative financial instruments for purposes other than hedging, although certain of our derivatives are not designated as accounting hedges. We recognize changes in the fair value of these derivatives in other (income) expense immediately.

Some of our derivative instruments contain credit risk provisions that could require us to make immediate payment on net liability positions in the event that we default on certain outstanding debt obligations. The aggregate fair value of our derivative instruments with credit risk related contingent features that are in a liability position as of June 30, 2015, was $4.2 million. We are not required to post any collateral on our derivative instruments and do not expect the credit risk provisions to be triggered.

In the event that a counterparty fails to meet the terms of an interest rate swap agreement or a foreign exchange contract, our exposure is limited to the fair value of the swap, if in our favor. We manage the credit risk of counterparties by transacting with institutions that we consider financially sound and by avoiding concentrations of risk with a single counterparty. We believe that the risk of non-performance by any of our counterparties is remote.

The following table shows the impacts of our derivative instruments on our statements of comprehensive income (in millions):

		Three Months Ended June 30						Six Months Ended June 30
Derivative Designation	Location of Loss (Gain) Recognized	2015			2014			2015			2014
Fair value hedges (1)	Interest expense	$	1.4		$	(0.5	)	$	(0.9	)	$	1.6
Cash flow hedges	Other comprehensive (income) loss (effective portion)	10.9			1.4			2.5			3.2
Cash flow hedges	Interest expense (effective portion reclassified from accumulated other comprehensive loss)	1.4			1.2			2.7			2.4
Cash flow hedges	Operating lease expense (effective portion reclassified from accumulated other comprehensive loss)	0.1			0.3			0.2			0.5
Cash flow hedges (2)	Other (income) expense (effective portion reclassified from accumulated other comprehensive loss)	12.6			—			4.2			2.2
Non-designated (3)	Other (income) expense	(1.6		)	0.9			(5.8		)	1.0

_________

(1) The fair value adjustments related to the underlying debt equally offset the amounts recognized in interest expense.

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Accumulated Other Comprehensive Income (Loss)

6 Months Ended

Jun. 30, 2015

Equity [Abstract]

Accumulated Other Comprehensive Income (Loss)

Accumulated Other Comprehensive Loss

The following table shows the change in components for accumulated other comprehensive loss (in millions):

	Foreign Currency Translation Gain (Loss)			Unrealized Gain (Loss) on Securities			Unrealized Gain (Loss) on Derivative Instruments			Post-Retirement Benefit Plans			Total
Balance at December 31, 2014	$	(21.9	)	$	0.3		$	(19.1	)	$	(107.7	)	$	(148.4	)
Change in component	(48.0		)	—			6.0			—			(42.0		)
Reclassification adjustments into earnings	—			—			(7.0		)	3.3			(3.7		)
Income tax effect	—			—			(1.6		)	(1.2		)	(2.8		)
Balance at March 31, 2015	$	(69.9	)	$	0.3		$	(21.7	)	$	(105.6	)	$	(196.9	)
Change in component	11.5			(0.2		)	(13.3		)	—			(2.0		)
Reclassification adjustments into earnings	—			—			14.1			3.5			17.6
Income tax effect	—			0.1			(0.7		)	(1.4		)	(2.0		)
Balance at June 30, 2015	$	(58.4	)	$	0.2		$	(21.6	)	$	(103.5	)	$	(183.3	)

________

See "Note 4. Fair Value Disclosure" and "Note 5. Pension and Other Post-Retirement Benefits" for impacts of the reclassification adjustments on the statement of comprehensive income.

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Commercial Commitments

6 Months Ended

Jun. 30, 2015

Guarantees [Abstract]

Commercial Commitments

Commercial Commitments

We have entered into various commercial commitments, such as guarantees and standby letters of credit, related to certain transactions. These commercial commitments require us to fulfill specific obligations in the event of third party demands. Similar to our balance sheet investments, these commitments expose us to credit, market, and equipment risk. Accordingly, we evaluate these commitments and other contingent obligations using techniques similar to those we use to evaluate funded transactions.

The following table shows our commercial commitments (in millions):

	June 30 2015		December 31 2014
Lease payment guarantees	$	25.4	$	28.5
Standby letters of credit	8.6		8.7
Performance bonds	0.4		0.4
Total commercial commitments (1)	$	34.4	$	37.6

_________

(1) The carrying value of liabilities on the balance sheet for commercial commitments was $4.6 million at June 30, 2015 and $5.1 million at December 31, 2014. The expirations of these commitments range from 2017 to 2023. We are not aware of any event that would require us to satisfy any of our commitments.

Lease payment guarantees are commitments to financial institutions to make lease payments for a third party in the event they default. We reduce any liability that may result from these guarantees by the value of the underlying asset or group of assets.

We are also parties to standby letters of credit and performance bonds, which primarily relate to contractual obligations and general liability insurance coverages. No material claims have been made against these obligations, and no material losses are anticipated.

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Earnings Per Share

6 Months Ended

Jun. 30, 2015

Earnings Per Share [Abstract]

Earnings Per Share

Earnings per Share

We compute basic earnings per share by dividing net income available to our common shareholders by the weighted average number of shares of our common stock outstanding. We appropriately weighted shares issued or reacquired during the period that they were outstanding. Our diluted earnings per share reflect the impacts of our potentially dilutive securities and our equity compensation awards.

In the first quarter of 2014, our board of directors authorized a $250 million share repurchase program. During the first six months of 2015, 1.2 million shares were acquired for $68.0 million. As of June 30, 2015, a total of 3.1 million shares had been repurchased for $192.5 million, and $57.5 million was available under the repurchase authorization.

The following table shows the computation of our basic and diluted net income per common share (in millions, except per share amounts):

	Three Months Ended June 30				Six Months Ended June 30
	2015		2014		2015		2014
Numerator:
Net income	$	45.4	$	53.1	$	107.6	$	95.2
Denominator:
Weighted average shares outstanding - basic	43.5		45.5		43.8		45.7
Effect of dilutive securities:
Equity compensation plans	0.7		0.8		0.7		0.8
Weighted average shares outstanding - diluted	44.2		46.3		44.5		46.5
Basic earnings per share	$	1.04	$	1.17	$	2.46	$	2.08
Diluted earnings per share	$	1.03	$	1.15	$	2.42	$	2.05

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Legal Proceedings and Other Contingencies

6 Months Ended

Jun. 30, 2015

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 our 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. For a full discussion of our pending legal matters, please refer to "Note 23. Legal Proceedings and Other Contingencies" of our consolidated financial statements in our Annual Report on Form 10-K for the year ended December 31, 2014.

Viareggio Derailment

In June 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, in the province of Lucca, 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 December 14, 2012, the Public Prosecutors of Lucca ("Public Prosecutors") formally charged GATX Rail Austria and two of its subsidiaries (collectively, "GRA"), as well as ten maintenance and supervisory employees (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 charges were brought against four Italian Railway companies and eighteen of their employees, among others. The Public Prosecutors assert that the axle on a tank car broke, causing the derailment and resulting in a tank rupture and release of LPG, after the car hit an obstacle placed on the side of the track by the Italian Railway. The Public Prosecutors further allege that a crack in the axle 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 trial in the Court of Lucca (the “Lucca Trial”) commenced on November 13, 2013.

With respect to civil claims, GRA’s insurers continue to work cooperatively with the insurer for the Italian Railway to adjust and settle personal injury and property damage claims. These joint settlement efforts have so far settled most of the significant civil claims related to the accident; however, approximately 90 civil claimants did not settle and are currently parties to the Lucca Trial. The Court of Lucca will determine both the civil and criminal liability of the defendants in the one proceeding. GRA expects that its insurers will cover any civil damages if awarded to the claimants in the Lucca trial. The Public Prosecutors and civil claimants have finished presenting their cases in the Lucca Trial. GRA, the Italian Railway, and the other defendants in the Lucca Trial will begin presenting the defense of their cases on September 16, 2015.

Since May 2012, one of the excess insurers providing coverage, Liberty Mutual Insurance Europe Limited (“Liberty”), has settled civil claims but has refused to reimburse GRA for its ongoing legal defense fees and costs, taking a position contrary to our other insurers in the prior underlying layers who had provided coverage for such expenses. As of June 30, 2015, GRA had incurred approximately $9.6 million in unreimbursed defense fees and costs, and GRA continues to incur costs in connection with the Lucca Trial. Consequently, in October 2013, GRA filed an arbitration proceeding against Liberty seeking to recoup its unreimbursed defense fees and costs (the “Liberty Arbitration”), which is set for hearing in November 2015. GRA is also negotiating issues of reimbursement for outstanding defense costs with the three other insurers in the current coverage layer, which includes a 25% share held by Liberty. GRA cannot predict the outcome of the Liberty Arbitration or the amount of defense fees and costs that ultimately may not be reimbursed by Liberty or the other excess insurers in the current coverage layer.

GRA believes that it and its Employees acted diligently and properly, but we cannot predict the outcome of the Lucca Trial or what other legal proceedings or claims, if any, may be initiated against GRA or its personnel, and, therefore, cannot reasonably estimate the possible amount or range of loss that may ultimately be incurred in connection with this accident. Accordingly, we have not established any accruals with respect to this matter.

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Share Based Compensation (Details Textual) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term			4 years 8 months 12 days
Share-based compensation expense	$ 3.2	$ 3.1	$ 6.1	$ 6.2
Tax benefit from share-based compensation expense	$ 1.2	$ 1.2	$ 2.3	$ 2.3
Stock Option SAR Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units granted during period			341,800
Restricted Stock and Performance Share Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units granted during period			65,850
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units granted during period			61,740
Phantom Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units granted during period			5,617

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Share Based Compensation (Tables)

6 Months Ended

Jun. 30, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Weighted Average Fair Value and Assumptions

The estimated fair value of our 2015 SARs awards and related underlying assumptions are shown in the table below.

	2015
Estimated fair value	$	18.16
Quarterly dividend rate	$	0.38
Expected term of stock appreciation rights, in years	4.7
Risk-free interest rate	1.2		%
Dividend yield	2.6		%
Expected stock price volatility	29.2		%
Present value of dividends	$	6.90

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Description of Business (Details)	6 Months Ended
	Jun. 30, 2015 Segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of business segments	4

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Commercial Commitments (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Guarantees [Abstract]
Amount of liability included in recorded value of the company's commitment	$ 4.6	$ 5.1
Expiration of commitment range	2017 to 2023

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Consolidated Statements of Cash Flows $ in Millions	6 Months Ended
	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($) railcar
Operating Activities
Net income	$ 107.6	$ 95.2
Adjustments to reconcile income to net cash provided by operating activities:
Depreciation expense	149.1	136.5
Gains on sales of assets	(50.7)	(50.0)
Deferred income taxes	(40.0)	(27.8)
Share of affiliates’ earnings, net of dividends	(17.3)	(2.5)
Change in accrued operating lease expense	(33.2)	(22.0)
Other	(4.0)	(16.9)
Net cash provided by operating activities	191.5	168.1
Investing Activities
Purchases of leased-in assets	(99.5)	(150.5)
Portfolio proceeds	(211.5)	(137.8)
Proceeds from sales of other assets	(12.9)	(16.3)
Net decrease (increase) in restricted cash	1.2	7.2
Other	9.7	0.0
Net cash used in investing activities	(220.4)	(644.3)
Financing Activities
Net proceeds from issuances of debt (original maturities longer than 90 days)	689.0	876.6
Repayments of debt (original maturities longer than 90 days)	(645.2)	(665.8)
Net increase (decrease) in debt with original maturities of 90 days or less	68.1	(117.1)
Stock repurchases	(64.1)	(88.5)
Dividends	(35.2)	(32.2)
Other	5.1	(1.5)
Net cash (used in) provided by financing activities	118.5	(205.7)
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(3.9)	1.1
Net decrease in Cash and Cash Equivalents	(151.3)	(269.4)
Cash and Cash Equivalents at beginning of period	209.9	379.7
Cash and Cash Equivalents at end of period	58.6	110.3
Noncash Investing Transactions
Distributions from affiliates	0.0	1.1	[1]
Portfolio proceeds	211.5	$ 137.8
Number of railcars received | railcar		62
Portfolio Investments and Capital Additions	$ (356.2)	$ (655.1)

[1] (1) In 2014, we received distributions of 62 railcars from our Southern Capital affiliate.

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Pension and Other Post-Retirement Benefits

6 Months Ended

Jun. 30, 2015

Compensation and Retirement Disclosure [Abstract]

Pension and Other Post-Retirement Benefits

Pension and Other Post-Retirement Benefits

The following table shows components of our pension and other post-retirement benefits expense for the three months ended June 30, 2015 and 2014 (in millions):

	2015 Pension Benefits			2014 Pension Benefits			2015 Retiree Health and Life			2014 Retiree Health and Life
Service cost	$	2.0		$	1.6		$	0.1		$	0.1
Interest cost	5.0			5.3			0.3			0.4
Expected return on plan assets	(6.4		)	(7.1		)	—			—
Amortization of (1):
Unrecognized prior service credit	(0.3		)	(0.3		)	(0.1		)	(0.1		)
Unrecognized net actuarial loss (gain)	3.9			3.1			—			(0.1		)
Net expense	$	4.2		$	2.6		$	0.3		$	0.3

The following table shows components of our pension and other post-retirement benefits expense for the six months endedJune 30, 2015 and 2014 (in millions):

	2015 Pension Benefits			2014 Pension Benefits			2015 Retiree Health and Life			2014 Retiree Health and Life
Service cost	$	3.7		$	3.0		$	0.1		$	0.1
Interest cost	9.9			10.4			0.7			0.8
Expected return on plan assets	(12.9		)	(14.3		)	—			—
Amortization of (1):
Unrecognized prior service credit	(0.5		)	(0.5		)	(0.1		)	(0.1		)
Unrecognized net actuarial loss (gain)	7.4			5.7			—			(0.1		)
Net expense	$	7.6		$	4.3		$	0.7		$	0.7

_________

(1) Amounts reclassified from accumulated other comprehensive loss.

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Variable Interest Entities (Details) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2015	Dec. 31, 2014
Variable Interest Entity [Line Items]
Variable Interest Entity, Qualitative or Quantitative Information, Type of Entity		one
Variable Interest, Held by Entity [Member]
Carrying amounts of assets and liabilities of the VIE
Operating assets, net of accumulated depreciation	[1]	$ 85.6	$ 88.1
Nonrecourse debt		$ 11.5	$ 15.9

[1] (1) All operating assets are pledged as collateral on the nonrecourse debt.

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Income Taxes Effective Income Tax Reconciliation, Percent (Details)	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent	35.00%	32.00%

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Pension and Other Post-Retirement Benefits (Tables)

6 Months Ended

Jun. 30, 2015

Compensation and Retirement Disclosure [Abstract]

Pension obligations and plan assets and other post-retirement obligations

The following table shows components of our pension and other post-retirement benefits expense for the three months ended June 30, 2015 and 2014 (in millions):

	2015 Pension Benefits			2014 Pension Benefits			2015 Retiree Health and Life			2014 Retiree Health and Life
Service cost	$	2.0		$	1.6		$	0.1		$	0.1
Interest cost	5.0			5.3			0.3			0.4
Expected return on plan assets	(6.4		)	(7.1		)	—			—
Amortization of (1):
Unrecognized prior service credit	(0.3		)	(0.3		)	(0.1		)	(0.1		)
Unrecognized net actuarial loss (gain)	3.9			3.1			—			(0.1		)
Net expense	$	4.2		$	2.6		$	0.3		$	0.3

The following table shows components of our pension and other post-retirement benefits expense for the six months endedJune 30, 2015 and 2014 (in millions):

	2015 Pension Benefits			2014 Pension Benefits			2015 Retiree Health and Life			2014 Retiree Health and Life
Service cost	$	3.7		$	3.0		$	0.1		$	0.1
Interest cost	9.9			10.4			0.7			0.8
Expected return on plan assets	(12.9		)	(14.3		)	—			—
Amortization of (1):
Unrecognized prior service credit	(0.5		)	(0.5		)	(0.1		)	(0.1		)
Unrecognized net actuarial loss (gain)	7.4			5.7			—			(0.1		)
Net expense	$	7.6		$	4.3		$	0.7		$	0.7

_________

(1) Amounts reclassified from accumulated other comprehensive loss.