Fair Value Accounting (Details 1) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Recourse:
Less: unamortized discount	$ (99.8)	$ (111.1)
Total Recourse Debt	457.7	450.3
Non-recourse:
Total Non-recourse	2,517.2	2,457.4
Total debt	2,974.9	2,907.7
Carrying Value [Member]
Recourse:
Convertible subordinated notes	450.0	450.0
Less: unamortized discount	(99.8)	(111.1)
Convertible subordinated notes, total	350.2	338.9
Capital lease obligations	48.6	51.2
Term loan	54.7	57.4
Other	4.2	2.8
Total Recourse Debt	457.7	450.3
Non-recourse:
2006 secured railcar equipment notes	269.3	283.2
Promissory notes	465.5	493.8
2009 secured railcar equipment notes	218.4	229.2
2010 secured railcar equipment notes	354.3	367.1
TILC warehouse facility	308.5	80.2
TRIP Holdings senior secured notes	61.2
TRIP Master Funding secured railcar equipment notes	840.0
TRIP Holdings warehouse loan		1,003.9
Total Non-recourse	2,517.2	2,457.4
Total debt	2,974.9	2,907.7
Estimated Fair Value [Member]
Recourse:
Convertible subordinated notes	439.4	448.3
Convertible subordinated notes, total	439.4	448.3
Capital lease obligations	48.6	51.2
Term loan	55.7	54.2
Other	4.2	2.8
Total Recourse Debt	547.9	556.5
Non-recourse:
2006 secured railcar equipment notes	278.5	302.8
Promissory notes	448.6	482.2
2009 secured railcar equipment notes	228.6	256.1
2010 secured railcar equipment notes	333.1	345.5
TILC warehouse facility	308.5	80.2
TRIP Holdings senior secured notes	61.6
TRIP Master Funding secured railcar equipment notes	834.9
TRIP Holdings warehouse loan		994.0
Total Non-recourse	2,493.8	2,460.8
Total debt	$ 3,041.7	$ 3,017.3