Additional borrowing availability

No definition available.

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- Definition

Draw on term loan

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Future debt expected to be incurred by new capitalized entity

+ References

No definition available.

+ Details

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- Definition

Interest reserve amount

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

Proceeds from issuance of Long-term debt after proceeds used to refinance prior debt

+ References

No definition available.

+ Details

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- Definition

Use of portion of debt proceeds to repay other debt

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

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- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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-Paragraph 28

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

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-Section S99

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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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-Publisher SEC

-Name Regulation S-X (SX)

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-Section 03

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-Subparagraph (SX 210.5-02.22)

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-Topic 942

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-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

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-Subparagraph (SX 210.7-03.16)

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- Definition

The carrying amount, as of the date of the latest financial statement presented, of all assets that are pledged as collateral for the payment of the related debt obligation primarily arising from secured borrowings, repurchase agreements or other current or potential obligations, where the secured party does not have the right by contract or custom to sell or re-pledge the collateral and therefore are not reclassified and separately reported in the statement of financial position.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 30

-Section 50

-Paragraph 1A

-Subparagraph (b)(1)(i)

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- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

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-SubTopic 10

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-Subparagraph (b)

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- Definition

The cash inflow from a borrowing with the highest claim on the assets of the entity in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle, if longer).

+ References

+ Details

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- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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-Name Accounting Standards Codification

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-Glossary Financing Activities

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Debt Narrative - Senior Unsecured Notes and Secured Term Loan Facility - Railcar (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		0 Months Ended	1 Months Ended	3 Months Ended		3 Months Ended			1 Months Ended				1 Months Ended								1 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 01, 2013 Railcar Segment [Member]	Sep. 30, 2012 Railcar Segment [Member]	Mar. 31, 2014 Railcar Segment [Member]	Feb. 28, 2007 Railcar Segment [Member] Senior unsecured notes [Member]	Mar. 31, 2014 Railcar Segment [Member] Term Loan [Member]	Dec. 31, 2013 Railcar Segment [Member] Term Loan [Member]	Dec. 01, 2012 Railcar Segment [Member] Term Loan [Member]	Jan. 31, 2014 Railcar Segment [Member] Term Loan [Member] ARI Notes due 2020 [Member]	Mar. 31, 2014 Railcar Segment [Member] Term Loan [Member] ARI Notes due 2020 [Member]	Dec. 31, 2013 Railcar Segment [Member] Term Loan [Member] ARI Notes due 2020 [Member]	Mar. 27, 2014 Railcar Segment [Member] Term Loan [Member] RCF Term Loan [Member]	Mar. 31, 2014 Railcar Segment [Member] Term Loan [Member] Class A-1 Notes [Member]	Dec. 12, 2012 Railcar Segment [Member] Term Loan [Member] Class A-1 Notes [Member]	Dec. 12, 2012 Railcar Segment [Member] Term Loan [Member] Class A-2 Notes [Member]	Dec. 31, 2013 ARL [Member] Railcar Segment [Member] Revolving Credit Facility [Member]	Jul. 12, 2013 ARL [Member] Railcar Segment [Member] Revolving Credit Facility [Member]	Jun. 08, 2011 ARL [Member] Railcar Segment [Member] Revolving Credit Facility [Member]	Jan. 04, 2011 ARL [Member] Railcar Segment [Member] Revolving Credit Facility [Member]	Feb. 02, 2006 ARL [Member] Railcar Segment [Member] Revolving Credit Facility [Member]	Feb. 28, 2014 New ARL [Member] [Member] Railcar Segment [Member]	Jan. 31, 2014 New ARL [Member] [Member] Railcar Segment [Member] NCF I Term Loan [Member]	Jan. 31, 2014 New ARL [Member] [Member] Railcar Segment [Member] NCF II Term Loan [Member]
Debt Instrument [Line Items]
Aggregate principal amount issued, long-term debt						$ 275							$ 300		$ 110	$ 106	$ 47						$ 250	$ 135
Draw on term loan, initial draw									98
Long-term Debt								195
Line of credit facility																	73	120	130	110	40
Debt Instrument, Basis Spread on Variable Rate										2.00%
Interest reserve amount											4	4
Pledged assets							312	217
Repayments of debt			175	100
Loss (gain) on extinguishment of debt	126	(5)			1
Additional borrowing availability										100
Gross proceeds from sale of senior unsecured notes							100
Future debt expected to be incurred by new capitalized entity																						381
Proceeds from Issuance of Long-term Debt										316
Use of portion of debt proceeds to repay other debt										194				256
Proceeds from issuance of Long-term debt after proceeds used to refinance prior debt										$ 122