Fair Value Accounting (Details 1) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Recourse:
Less: unamortized discount	$ (96.8)	$ (99.8)
Total Recourse Debt	461.2	457.7
Non-recourse:
Total non-recourse debt	2,466.3	2,517.2
Total debt	2,927.5	2,974.9
Carrying Value [Member]
Recourse:
Convertible subordinated notes	450.0	450.0
Less: unamortized discount	(96.8)	(99.8)
Convertible subordinated notes, total	353.2	350.2
Capital lease obligations	47.9	48.6
Term loan	54.0	54.7
Other	6.1	4.2
Total Recourse Debt	461.2	457.7
Non-recourse:
2006 secured railcar equipment notes	266.0	269.3
Promissory notes	459.3	465.5
2009 secured railcar equipment notes	216.2	218.4
2010 secured railcar equipment notes	351.3	354.3
TILC warehouse facility	282.7	308.5
TRIP Holdings senior secured notes	61.2	61.2
TRIP Master Funding secured railcar equipment notes	829.6	840.0
Total non-recourse debt	2,466.3	2,517.2
Total debt	2,927.5	2,974.9
Estimated Fair Value [Member]
Recourse:
Convertible subordinated notes	490.4	439.4
Capital lease obligations	47.9	48.6
Term loan	54.6	55.7
Other	6.1	4.2
Total Recourse Debt	599.0	547.9
Non-recourse:
2006 secured railcar equipment notes	283.0	278.5
Promissory notes	443.1	448.6
2009 secured railcar equipment notes	240.3	228.6
2010 secured railcar equipment notes	354.2	333.1
TILC warehouse facility	282.7	308.5
TRIP Holdings senior secured notes	62.2	61.6
TRIP Master Funding secured railcar equipment notes	890.8	834.9
Total non-recourse debt	2,556.3	2,493.8
Total debt	$ 3,155.3	$ 3,041.7