Summary of Significant Accounting Policies (Details) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended	3 Months Ended		12 Months Ended
	Sep. 30, 2010	Jun. 30, 2011	Jun. 30, 2009	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 09, 2010
New Accounting Pronouncements or Change In Accounting Principle [Line Items]
Noncontrolling interest				$ 84.5	$ 80.9
Summary of Significant Accounting Policies (Textual) [Abstract]
Increase in ownership interest percentage in TRIP Holdings	57.00%
Effect of adopting accounting standard resulted in increase to net income					5.3
Effect of adopting accounting standard, per share					$ 0.07
Authorization for repurchase shares by board of director							200
Shares repurchased, shares				0
Share repurchase program effective date							Jan. 01, 2011
Reclassification of purchase of additional interest in TRIP Holdings		15.5			(37.6)
Percentage of tax benefits realized				50.00%
Percentage of receivables, outstanding				21.00%
Percentage of receivables, paid next year				69.00%
Goodwill impairment			325.0			325.0
Net book value of intangible assets				24.7
Decrease in revenue due to adaptation of emerging industry policy					33.6	154.3
Offsetting decrease in cash flow from investing activities due to adaptation of emerging industry policy					0.3	2.1
Reclassification of deferred loan issuance costs from an operating activity to a financing activity					6.6	19.0
TRIP Holdings [Member]
New Accounting Pronouncements or Change In Accounting Principle [Line Items]
Retained earnings					105.4
Net of tax benefit					57.7
Noncontrolling interest					$ 129.9
Maximum [Member]
New Accounting Pronouncements or Change In Accounting Principle [Line Items]
Product warranties against workmanship and materials defects				5 years
Percentage of ownership for using equity method of accounting				50.00%
Minimum [Member]
New Accounting Pronouncements or Change In Accounting Principle [Line Items]
Product warranties against workmanship and materials defects				1 year
Building Improvements [Member]
Property Plant and Equipment [Line Items]
Estimated useful lives, Minimum				3
Estimated useful lives, Maximum				30
Leasehold Improvements [Member]
Property Plant and Equipment [Line Items]
Estimated useful lives, Maximum				7
Machinery and other [Member]
Property Plant and Equipment [Line Items]
Estimated useful lives, Minimum				2
Estimated useful lives, Maximum				10
Information Systems Hardware and Software [Member]
Property Plant and Equipment [Line Items]
Estimated useful lives, Minimum				2
Estimated useful lives, Maximum				5
Railcars in lease fleet [Member]
Property Plant and Equipment [Line Items]
Estimated useful lives, Average				35