Derivative Instruments (Details Textual) (USD $) In Millions, unless otherwise specified						12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2012 Designated as hedging instrument Foreign exchange hedges	Dec. 31, 2012 Designated as hedging instrument Expired hedges 2006 secured railcar equipment notes		Dec. 31, 2012 Designated as hedging instrument Expired hedges Promissory notes		Dec. 31, 2012 Designated as hedging instrument Expired hedges TRIP Holdings		Dec. 31, 2012 Designated as hedging instrument Open hedges Promissory notes		Dec. 31, 2012 Designated as hedging instrument Open hedges TILC Warehouse		Dec. 31, 2012 Designated as hedging instrument Open hedges TRIP Master Funding secured railcar equipment notes		Jul. 31, 2011 Designated as hedging instrument Open hedges TRIP Master Funding secured railcar equipment notes
Derivative Instruments (Textual) [Abstract]
Interest rate swap, notional amount						$ 200.0		$ 370.0		$ 788.5		$ 443.8		$ 200.0		$ 78.4		$ 94.1
Changes in fair value of cash flow hedges which is being amortized to income						4.5		(24.5)
Expected effect during next twelve months						(0.3)	[1]	3.1	[1]	5.6	[1]	16.7	[1],[2]	0	[1],[2]	1.8	[1],[2]
Remaining AOCL balance of foreign exchange hedges with quarterly maturities	$ (34.8)	$ (46.2)	$ (36.3)	$ (29.0)	$ 0	$ 1.9		$ (7.2)		$ (19.9)		$ (34.9)				$ (2.9)

[1] )Based on fair value as of December 31, 2012

[2] Cash flows related to open hedges are included as a change in accrued liabilities in the Consolidated Statements of Cash Flows.