Consolidated Statements of Cash Flow (USD $) In Millions	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Net cash provided by (used in) operating activities	$ 1,774	$ 2,000
Property and equipment additions:
Flight equipment, including advance payments	(481)	(449)
Ground property and equipment, including technology	(172)	(75)
Payments to Acquire Short-term Investments	(479)	0
Proceeds from Sale of Short-term Investments	250	73
Other investments	0	(98)
Other, net	8	(6)
Net cash (used in) provided by investing activities	(874)	(555)
Cash Flows From Financing Activities:
Payments on long-term debt and capital lease obligations	(2,394)	(1,622)
Proceeds From Long-term Obligations	1,599	0
Payments of Debt Issuance Costs	(58)	0
(Increase) decrease in restricted cash and cash equivalents	(84)	0
Other, net	0	4
Net cash used in financing activities	(937)	(1,618)
Net Increase in Cash and Cash Equivalents	(37)	(173)
Cash and cash equivalents at beginning of period	2,892	4,607
Cash and cash equivalents at end of period	2,855	4,434
Non-cash transactions:
Flight equipment under capital leases	89	199
Debt discount on American Express Agreement	$ 0	$ 110