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Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified						3 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Fort Lauderdale-Hollywood International Airport	Sep. 30, 2014 HOU	Sep. 30, 2014 Los Angeles World Airport	Jun. 30, 2012 DAL	Dec. 31, 2010 DAL	Sep. 30, 2014 DAL
Airport Project [Line Items]
Total Expected Cost Of Airport Project			$ 295	$ 156	$ 525			$ 519
Assets constructed for others	570	453		42	44			484
Municipal bonds issued						146	310
Construction obligation	$ 521	$ 437						$ 481

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- Definition

The aggregate costs related to airport construction projects recorded as an asset.

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- Definition

Construction Obligation, Noncurrent

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- Definition

Long-term debt securities issued by state, city or local governments or the agencies operated by state, city or local governments.

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- Definition

The total expected cost of the airport modernization project for the city.

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No definition available.

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