Railcar Leasing and Management Services Group (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Consolidating Financial Information
Cash, cash equivalents, and short-term marketable securities	$ 962.9	$ 578.2
Property, plant, and equipment, net	5,460.1	5,320.3
Net deferred profit on railcars sold to the Leasing Group	(557.2)	(549.7)
Property, plant, and equipment, net	4,902.9us-gaap_PropertyPlantAndEquipmentNet	4,770.6us-gaap_PropertyPlantAndEquipmentNet
Restricted cash	234.7	260.7
Debt:
Less: unamortized discount	(60.0)	(74.1)
Total debt	3,553.0us-gaap_DebtAndCapitalLeaseObligations	2,989.8us-gaap_DebtAndCapitalLeaseObligations
Net deferred tax liabilities	615.0us-gaap_DeferredTaxLiabilities	639.4us-gaap_DeferredTaxLiabilities
Recourse
Debt:
Recourse	889.3	493.1
Less: unamortized discount	(60.0)	(74.1)
Total debt	829.3	419.0
Non-recourse
Debt:
Total debt	2,723.7	2,570.8
Partially-owned subsidiaries
Consolidating Financial Information
Restricted cash	91.9	77.1
Leasing Group
Consolidating Financial Information
Net deferred profit on railcars sold to the Leasing Group	(557.2)	(549.7)
Leasing Group \| Wholly-owned subsidiaries
Consolidating Financial Information
Cash, cash equivalents, and short-term marketable securities	11.9	3.5
Property, plant, and equipment, net	2,599.2	2,964.6
Restricted cash	142.8	183.6
Debt:
Total debt	1,246.9	1,356.9
Net deferred tax liabilities	658.2	671.9
Leasing Group \| Wholly-owned subsidiaries \| Recourse
Debt:
Recourse	39.1	42.2
Less: unamortized discount	0	0
Total debt	39.1	42.2
Leasing Group \| Wholly-owned subsidiaries \| Non-recourse
Debt:
Total debt	1,207.8	1,314.7
Leasing Group \| Partially-owned subsidiaries
Consolidating Financial Information
Cash, cash equivalents, and short-term marketable securities	0	0
Property, plant, and equipment, net	1,999.9	1,685.1
Restricted cash	91.9	77.1
Debt:
Total debt	1,515.9	1,256.1
Net deferred tax liabilities	0.9	0
Leasing Group \| Partially-owned subsidiaries \| Recourse
Debt:
Recourse	0	0
Less: unamortized discount	0	0
Total debt	0	0
Leasing Group \| Partially-owned subsidiaries \| Non-recourse
Debt:
Total debt	1,515.9	1,256.1
Manufacturing/ Corporate
Consolidating Financial Information
Cash, cash equivalents, and short-term marketable securities	951.0	574.7
Property, plant, and equipment, net	861.0	670.6
Restricted cash	0	0
Debt:
Total debt	790.2	376.8
Net deferred tax liabilities	(44.1)	(32.5)
Manufacturing/ Corporate \| Recourse
Debt:
Recourse	850.2	450.9
Less: unamortized discount	(60.0)	(74.1)
Total debt	790.2	376.8
Manufacturing/ Corporate \| Non-recourse
Debt:
Total debt	$ 0	$ 0

Net deferred profit intercompany equipment sales.

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Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable.

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Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

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Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

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