Railcar Leasing and Management Services Group (Details 2) (Leasing Group, USD $) In Millions, unless otherwise specified	Dec. 31, 2012
Future contractual minimum rental revenues on leases
2013	$ 369.2
2014	294.7
2015	236.8
2016	185.7
2017	129.9
Thereafter	249.7
Total	1,466.0
Wholly-owned subsidiaries
Future contractual minimum rental revenues on leases
2013	274.9
2014	222.9
2015	177.7
2016	136.8
2017	95.0
Thereafter	205.7
Total	1,113.0
TRIP Holdings
Future contractual minimum rental revenues on leases
2013	94.3
2014	71.8
2015	59.1
2016	48.9
2017	34.9
Thereafter	44.0
Total	$ 353.0

Future minimum rental payments in aggregate as of the balance sheet date under operating leases.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6454179&loc=d3e41551-112718

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 13

-Paragraph 23

-Subparagraph b(ii)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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