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Leases (Future Minimum Lease Payments Under Capital and Operating Leases) (Parenthetical) (Detail) (USD $)
In Millions, unless otherwise specified

Dec. 31, 2012

Present value of net minimum lease payments

$ 431

^[1]

Liabilities Subject To Compromise [Member]

Lease payments, Type [Line Items]

Present value of net minimum lease payments

19

Deferred Rent Credit

201

Accrued Liabilities And Other Liabilities And Deferred Credits [Member]

Lease payments, Type [Line Items]

Deferred Rent Credit

$ 160

[1]	As of December 31, 2012, included in Liabilities Subject to Compromise on the accompanying consolidated balance sheet is approximately $19 million relating to ground capital leases.

- Definition

The cumulative difference between the rental payments required by a lease agreement and the rental income or expense recognized on a straight-line basis, or other systematic and rational basis more representative of the time pattern in which use or benefit is granted or derived from the leased property, expected to be recognized in income or expense over the term of the leased property by the lessor or lessee, respectively.

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