Railcar Leasing and Management Services Group (Details) - USD ($) $ in Millions	Sep. 30, 2015		Dec. 31, 2014
Consolidating Financial Information
Cash, cash equivalents, and short-term marketable securities	$ 677.8		$ 962.9
Property, plant, and equipment, net	5,308.4	[1]	4,902.9
Restricted cash	211.8	[1]	234.7
Debt:
Recourse	886.6		889.3
Less: unamortized discount	(48.3)	[1]	(60.0)
Total recourse debt	838.3	[1]	829.3
Non-recourse debt	2,446.2		2,723.7
Total debt	3,284.5	[1]	3,553.0
Net deferred tax liabilities	649.6		615.0
Wholly-owned subsidiaries
Debt:
Non-recourse debt	982.1	[1]	1,207.8
Partially-owned subsidiaries
Consolidating Financial Information
Restricted cash	90.5	[1]	91.9
Debt:
Non-recourse debt	1,464.1	[1]	1,515.9
Leasing Group
Debt:
Non-recourse debt	2,446.2		2,723.7
Leasing Group | Wholly-owned subsidiaries
Debt:
Non-recourse debt	982.1		1,207.8
Leasing Group | Partially-owned subsidiaries
Debt:
Non-recourse debt	1,464.1		1,515.9
Operating segment
Consolidating Financial Information
Property, plant, and equipment, net	5,950.5		5,460.1
Operating segment | Leasing Group | Wholly-owned subsidiaries
Consolidating Financial Information
Cash, cash equivalents, and short-term marketable securities	2.5		11.9
Property, plant, and equipment, net	3,064.3		2,599.2
Restricted cash	121.3		142.8
Debt:
Recourse	36.6		39.1
Less: unamortized discount	0.0		0.0
Total recourse debt	36.6		39.1
Non-recourse debt	982.1		1,207.8
Total debt	1,018.7		1,246.9
Net deferred tax liabilities	656.7		658.2
Operating segment | 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	1,952.5		1,999.9
Restricted cash	90.5		91.9
Debt:
Recourse	0.0		0.0
Less: unamortized discount	0.0		0.0
Total recourse debt	0.0		0.0
Non-recourse debt	1,464.1		1,515.9
Total debt	1,464.1		1,515.9
Net deferred tax liabilities	0.9		0.9
Manufacturing/ Corporate
Consolidating Financial Information
Cash, cash equivalents, and short-term marketable securities	675.3		951.0
Property, plant, and equipment, net	933.7		861.0
Restricted cash	0.0		0.0
Debt:
Recourse	850.0		850.2
Less: unamortized discount	(48.3)		(60.0)
Total recourse debt	801.7		790.2
Non-recourse debt	0.0		0.0
Total debt	801.7		790.2
Net deferred tax liabilities	(8.0)		(44.1)
Net deferred profit on railcars sold to the Leasing Group
Consolidating Financial Information
Property, plant, and equipment, net	$ (642.1)		$ (557.2)

[1] (unaudited)