Railcar Leasing and Management Services Group (Details) - USD ($) $ in Millions	Jun. 30, 2016		Dec. 31, 2015
Consolidating Financial Information
Cash, cash equivalents, and short-term marketable securities	$ 814.0		$ 870.9
Property, plant, and equipment, net	5,606.6	[1]	5,348.0
Restricted cash	183.3	[1]	195.8
Debt:
Recourse	884.0		885.7
Less: unamortized discount	(35.8)	[1]	(44.2)
Less: unamortized debt issuance costs	(4.3)		(4.8)
Recourse, net of unamortized discount of $35.8 and $44.2	843.9	[1]	836.7
Non-recourse	2,314.8		2,390.7
Less: unamortized debt issuance costs	(29.1)		(32.0)
Non-recourse debt, net of unamortized debt issuance costs	2,285.7		2,358.7
Total debt	3,129.6	[1]	3,195.4
Net deferred tax liabilities	885.3		734.8
Wholly-owned subsidiaries
Debt:
Non-recourse debt, net of unamortized debt issuance costs	892.4	[1]	928.7
Partially-owned subsidiaries
Consolidating Financial Information
Restricted cash	80.3	[1]	89.9
Debt:
Non-recourse debt, net of unamortized debt issuance costs	1,393.3	[1]	1,430.0
Manufacturing/ Corporate
Consolidating Financial Information
Property, plant, and equipment, net	968.7		956.1
Leasing Group
Debt:
Non-recourse debt, net of unamortized debt issuance costs	2,285.7		2,358.7
Leasing Group | Wholly-owned subsidiaries
Debt:
Non-recourse	905.6		943.8
Less: unamortized debt issuance costs	(13.2)		(15.1)
Non-recourse debt, net of unamortized debt issuance costs	892.4		928.7
Leasing Group | Partially-owned subsidiaries
Debt:
Non-recourse	1,409.2		1,446.9
Less: unamortized debt issuance costs	(15.9)		(16.9)
Non-recourse debt, net of unamortized debt issuance costs	1,393.3		1,430.0
Operating Segments
Consolidating Financial Information
Cash, cash equivalents, and short-term marketable securities	810.7		867.1
Property, plant, and equipment, net	6,352.1		6,021.0
Restricted cash	0.0		0.0
Debt:
Recourse	849.9		849.9
Less: unamortized discount	(35.8)		(44.2)
Less: unamortized debt issuance costs	(4.2)		(4.7)
Recourse, net of unamortized discount of $35.8 and $44.2	809.9		801.0
Non-recourse	0.0		0.0
Less: unamortized debt issuance costs	0.0		0.0
Non-recourse debt, net of unamortized debt issuance costs	0.0		0.0
Total debt	809.9		801.0
Net deferred tax liabilities	34.8		(12.6)
Operating Segments | Manufacturing/ Corporate
Consolidating Financial Information
Property, plant, and equipment, net	968.7		956.1
Operating Segments | Leasing Group | Wholly-owned subsidiaries
Consolidating Financial Information
Cash, cash equivalents, and short-term marketable securities	3.3		3.8
Property, plant, and equipment, net	3,475.3		3,126.3
Restricted cash	103.0		105.9
Debt:
Recourse	34.1		35.8
Less: unamortized discount	0.0		0.0
Less: unamortized debt issuance costs	(0.1)		(0.1)
Recourse, net of unamortized discount of $35.8 and $44.2	34.0		35.7
Non-recourse	905.6		943.8
Less: unamortized debt issuance costs	(13.2)		(15.1)
Non-recourse debt, net of unamortized debt issuance costs	892.4		928.7
Total debt	926.4		964.4
Net deferred tax liabilities	849.1		746.0
Operating Segments | Leasing Group | Partially-owned subsidiaries
Consolidating Financial Information
Cash, cash equivalents, and short-term marketable securities	0.0		0.0
Property, plant, and equipment, net	1,908.1		1,938.6
Restricted cash	80.3		89.9
Debt:
Recourse	0.0		0.0
Less: unamortized discount	0.0		0.0
Less: unamortized debt issuance costs	0.0		0.0
Recourse, net of unamortized discount of $35.8 and $44.2	0.0		0.0
Non-recourse	1,409.2		1,446.9
Less: unamortized debt issuance costs	(15.9)		(16.9)
Non-recourse debt, net of unamortized debt issuance costs	1,393.3		1,430.0
Total debt	1,393.3		1,430.0
Net deferred tax liabilities	1.4		1.4
Net deferred profit on railcars sold to the Leasing Group
Consolidating Financial Information
Property, plant, and equipment, net	$ (745.5)		$ (673.0)

[1] (unaudited)