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Leases (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2014
Leases [Abstract] |
Sublease Rollforward |
(in millions) |  | B717 lease/sublease liability
Balance at December 31, 2012 |  | $ | 128 |
Lease/sublease accretion |  | 6 |
Lease/sublease payments, net (a) |  | (12 | )
Balance at December 31, 2013 |  | $ | 122 |
Lease/sublease accretion |  | 4 |
Lease/sublease expense adjustment |  | 19 |
Lease/sublease payments, net (a) |  | (66 | )
Balance at September 30, 2014 |  | $ | 79 |
(a) Includes lease conversion cost payments

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- Definition Sublease Rollforward + References No definition available. + Details
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Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
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