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Debt Narrative - Senior Unsecured Notes and Secured Term Loan Facility - Railcar (Details) (USD $) | 12 Months Ended | 1 Months Ended | 12 Months Ended |  | 12 Months Ended |  |  | 12 Months Ended | 1 Months Ended | 0 Months Ended | 1 Months Ended |  |  |  |  |  |  |  |  | 0 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Jan. 31, 2013 Railcar Segment [Member] | Sep. 30, 2012 Railcar Segment [Member] | Dec. 31, 2013 Railcar Segment [Member] | Dec. 31, 2012 Railcar Segment [Member] | Dec. 31, 2011 Railcar Segment [Member] | Feb. 28, 2007 Railcar Segment [Member] Senior unsecured notes [Member] | Dec. 31, 2013 Railcar Segment [Member] Term Loan [Member] | Dec. 31, 2012 Railcar Segment [Member] Term Loan [Member] | Dec. 01, 2012 Railcar Segment [Member] Term Loan [Member] | Dec. 31, 2013 Loss on extinguishment of debt | Dec. 31, 2012 Loss on extinguishment of debt | Dec. 31, 2011 Loss on extinguishment of debt | Sep. 30, 2012 Loss on extinguishment of debt Railcar Segment [Member] | Oct. 02, 2013 New ARL [Member] [Member] Railcar Segment [Member] | Feb. 28, 2014 New ARL [Member] [Member] Railcar Segment [Member] | Jan. 31, 2014 New ARL [Member] [Member] Railcar Segment [Member] | Dec. 31, 2013 Revolving Credit Facility [Member] ARL [Member] Railcar Segment [Member] | Jul. 12, 2013 Revolving Credit Facility [Member] ARL [Member] Railcar Segment [Member] | Dec. 31, 2012 Revolving Credit Facility [Member] ARL [Member] Railcar Segment [Member] | Jun. 08, 2011 Revolving Credit Facility [Member] ARL [Member] Railcar Segment [Member] | Jan. 04, 2011 Revolving Credit Facility [Member] ARL [Member] Railcar Segment [Member] | Oct. 09, 2009 Revolving Credit Facility [Member] ARL [Member] Railcar Segment [Member] | Feb. 02, 2006 Revolving Credit Facility [Member] ARL [Member] Railcar Segment [Member] | Dec. 12, 2013 Class A-2 Notes [Member] Railcar Segment [Member] Term Loan [Member] | Dec. 12, 2013 Class A-1 Notes [Member] Railcar Segment [Member] Term Loan [Member]
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount issued, long-term debt |  |  |  |  |  |  |  |  | $ 275,000,000 |  |  |  |  |  |  |  |  |  | $ 385,000,000 | $ 47,000,000 |  | $ 58,000,000 |  |  |  |  |  |
Future debt expected to be incurred by new capitalized entity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 381,000,000 | 381,000,000 |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Long-term Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 106,000,000 | 110,000,000
Draw on term loan, initial draw |  |  |  |  |  |  |  |  |  |  |  | 98,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross proceeds from sale of senior unsecured notes |  |  |  |  |  |  |  |  |  | 100,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Debt |  |  |  |  |  |  |  |  |  | 196,000,000 | 100,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  |  |  |  |  | 2.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate assets pledged to collateralize mortgages |  |  |  |  |  |  |  |  |  | 217,000,000 | 112,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 126,000,000 | 120,000,000 | 115,000,000 | 130,000,000 | 110,000,000 | 43,000,000 | 40,000,000 |  |
Repayments of debt |  |  |  | 175,000,000 | 100,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other (loss) income, net | $ 21,000,000 | $ (175,000,000) | $ (72,000,000) |  |  | $ (6,000,000) | $ 0 | $ (2,000,000) |  |  |  |  | $ 0 | $ (10,000,000) | $ 0 | $ (2,000,000) |  |  |  |  |  |  |  |  |  |  |  |

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