Railcar Leasing and Management Services Group (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013
Consolidating Financial Information
Cash, cash equivalents, and short-term marketable securities	$ 933.8		$ 578.2
Property, plant, and equipment, net	5,207.7		5,320.3
Net deferred profit on railcars sold to the Leasing Group	(537.0)		(549.7)
Property, plant, and equipment, net	4,670.7	[1]	4,770.6
Restricted cash	248.5	[1]	260.7
Debt:
Less: unamortized discount	(67.0)	[1]	(74.1)
Total debt	3,242.5	[1]	2,989.8
Net deferred tax liabilities	639.7		639.4
Recourse
Debt:
Recourse	491.5		493.1
Less: unamortized discount	(67.0)		(74.1)
Total debt	424.5		419.0
Non-recourse
Debt:
Non-recourse	2,818.0		2,570.8
Partially-owned subsidiaries
Consolidating Financial Information
Restricted cash	90.6	[1]	77.1
Leasing Group
Consolidating Financial Information
Net deferred profit on railcars sold to the Leasing Group	(537.0)		(549.7)
Leasing Group | Wholly-owned subsidiaries
Consolidating Financial Information
Cash, cash equivalents, and short-term marketable securities	3.3		3.5
Property, plant, and equipment, net	2,436.8		2,964.6
Restricted cash	157.9		183.6
Debt:
Total debt	1,301.3		1,356.9
Net deferred tax liabilities	647.8		671.9
Leasing Group | Wholly-owned subsidiaries | Recourse
Debt:
Recourse	40.6		42.2
Less: unamortized discount	0		0
Total debt	40.6		42.2
Leasing Group | Wholly-owned subsidiaries | Non-recourse
Debt:
Non-recourse	1,260.7		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	2,030.4		1,685.1
Restricted cash	90.6		77.1
Debt:
Total debt	1,557.3		1,256.1
Net deferred tax liabilities	0.1		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:
Non-recourse	1,557.3		1,256.1
Manufacturing/Corporate
Consolidating Financial Information
Cash, cash equivalents, and short-term marketable securities	930.5		574.7
Property, plant, and equipment, net	740.5		670.6
Restricted cash	0		0
Debt:
Total debt	383.9		376.8
Net deferred tax liabilities	(8.2)		(32.5)
Manufacturing/Corporate | Recourse
Debt:
Recourse	450.9		450.9
Less: unamortized discount	(67.0)		(74.1)
Total debt	383.9		376.8
Manufacturing/Corporate | Non-recourse
Debt:
Non-recourse	$ 0		$ 0

[1] (unaudited)