Railcar Leasing and Management Services Group (Details) - USD ($) $ in Millions	Jun. 30, 2017		Dec. 31, 2016
Consolidating Financial Information
Cash, cash equivalents, and short-term marketable securities	$ 988.3		$ 798.1
Property, plant, and equipment, net	6,073.2	[1]	5,966.8
Restricted cash	194.8	[1]	178.2
Debt:
Recourse	880.2		881.5
Less: unamortized discount	(17.9)	[1]	(27.1)
Less: unamortized debt issuance costs	(3.3)		(3.8)
Recourse, net of unamortized discount and unamortized debt issuance costs	859.0	[1]	850.6
Non-recourse	2,438.2		2,232.4
Less: unamortized debt issuance costs	(27.2)		(26.4)
Non-recourse debt, net of unamortized debt issuance costs	2,411.0		2,206.0
Total debt	3,270.0	[1]	3,056.6
Net deferred tax liabilities	1,194.6		1,057.0
Wholly-owned subsidiaries
Debt:
Non-recourse debt, net of unamortized debt issuance costs	1,069.0	[1]	840.0
Partially-owned subsidiaries
Consolidating Financial Information
Restricted cash	77.0	[1]	78.4
Debt:
Non-recourse debt, net of unamortized debt issuance costs	1,342.0	[1]	1,366.0
Manufacturing/ Corporate
Consolidating Financial Information
Property, plant, and equipment, net	953.1		961.7
Leasing Group
Debt:
Non-recourse debt, net of unamortized debt issuance costs	2,411.0		2,206.0
Leasing Group | Wholly-owned subsidiaries
Debt:
Non-recourse	1,082.1		851.4
Less: unamortized debt issuance costs	(13.1)		(11.4)
Non-recourse debt, net of unamortized debt issuance costs	1,069.0		840.0
Leasing Group | Partially-owned subsidiaries
Debt:
Non-recourse	1,356.1		1,381.0
Less: unamortized debt issuance costs	(14.1)		(15.0)
Non-recourse debt, net of unamortized debt issuance costs	1,342.0		1,366.0
Operating Segments
Consolidating Financial Information
Property, plant, and equipment, net	6,880.3		6,764.9
Operating Segments | Manufacturing/ Corporate
Consolidating Financial Information
Property, plant, and equipment, net	953.1		961.7
Operating Segments | Leasing Group | Wholly-owned subsidiaries
Consolidating Financial Information
Cash, cash equivalents, and short-term marketable securities	8.0		7.2
Property, plant, and equipment, net	4,077.1		3,923.6
Restricted cash	117.7		99.7
Debt:
Recourse	30.2		32.1
Less: unamortized discount	0.0		0.0
Less: unamortized debt issuance costs	0.0		(0.1)
Recourse, net of unamortized discount and unamortized debt issuance costs	30.2		32.0
Non-recourse	1,082.1		851.4
Less: unamortized debt issuance costs	(13.1)		(11.4)
Non-recourse debt, net of unamortized debt issuance costs	1,069.0		840.0
Total debt	1,099.2		872.0
Net deferred tax liabilities	1,035.5		956.6
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	1,850.1		1,879.6
Restricted cash	77.0		78.4
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 and unamortized debt issuance costs	0.0		0.0
Non-recourse	1,356.1		1,381.0
Less: unamortized debt issuance costs	(14.1)		(15.0)
Non-recourse debt, net of unamortized debt issuance costs	1,342.0		1,366.0
Total debt	1,342.0		1,366.0
Net deferred tax liabilities	2.0		2.0
Operating Segments | Manufacturing/ Corporate | Manufacturing/ Corporate
Consolidating Financial Information
Cash, cash equivalents, and short-term marketable securities	980.3		790.9
Restricted cash	0.1		0.1
Debt:
Recourse	850.0		849.4
Less: unamortized discount	(17.9)		(27.1)
Less: unamortized debt issuance costs	(3.3)		(3.7)
Recourse, net of unamortized discount and unamortized debt issuance costs	828.8		818.6
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	828.8		818.6
Net deferred tax liabilities	157.1		98.4
Net deferred profit on railcars sold to the Leasing Group
Consolidating Financial Information
Property, plant, and equipment, net	$ (807.1)		$ (798.1)

[1] (unaudited)