Fair Value Accounting (Details 1) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Recourse:
Less: unamortized discount	$ (93.8)	$ (99.8)
Total Recourse Debt	461.5	457.7
Non-recourse:
Total non-recourse debt	2,449.0	2,517.2
Total debt	2,910.5	2,974.9
Carrying Value [Member]
Recourse:
Convertible subordinated notes	450.0	450.0
Less: unamortized discount	(93.8)	(99.8)
Convertible subordinated notes, total	356.2	350.2
Capital lease obligations	47.2	48.6
Term loan	52.4	54.7
Other	5.7	4.2
Total Recourse Debt	461.5	457.7
Non-recourse:
2006 secured railcar equipment notes	262.6	269.3
Promissory notes	452.6	465.5
2009 secured railcar equipment notes	213.9	218.4
2010 secured railcar equipment notes	348.2	354.3
TILC warehouse facility	291.4	308.5
TRIP Holdings senior secured notes	61.2	61.2
TRIP Master Funding secured railcar equipment notes	819.1	840.0
Total non-recourse debt	2,449.0	2,517.2
Total debt	2,910.5	2,974.9
Estimated Fair Value [Member]
Recourse:
Convertible subordinated notes	450.2	439.4
Capital lease obligations	47.2	48.6
Term loan	55.6	55.7
Other	5.7	4.2
Total Recourse Debt	558.7	547.9
Non-recourse:
2006 secured railcar equipment notes	283.1	278.5
Promissory notes	433.8	448.6
2009 secured railcar equipment notes	242.1	228.6
2010 secured railcar equipment notes	354.8	333.1
TILC warehouse facility	291.4	308.5
TRIP Holdings senior secured notes	62.8	61.6
TRIP Master Funding secured railcar equipment notes	892.4	834.9
Total non-recourse debt	2,560.4	2,493.8
Total debt	$ 3,119.1	$ 3,041.7