Consolidated Balance Sheets Parenthetical (Parentheticals) (USD $) In Millions, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current Assets [Abstract]
Allowance for Doubtful Accounts Receivable, Current	$ 22	$ 36
Airline Related Inventory, Valuation Reserves	133	127
Property, Plant and Equipment [Abstract]
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	6,938	6,656
Other Assets [Abstract]
Finite-Lived Intangible Assets, Accumulated Amortization	$ 685	$ 670
Stockholders' Deficit
Common Stock, Par or Stated Value Per Share	$ 0.0001	$ 0.0001
Common Stock, Shares Authorized	1,500,000,000	1,500,000,000
Common Stock, Shares, Issued	874,326,995	867,866,505
Treasury Stock, Shares	17,905,962	16,464,472