CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:
Net Income	$ 430	$ 272
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	203	195
Stock-based compensation and other	26	8
Changes in certain assets and liabilities:
Changes in fair values of open fuel hedge contracts	35	28
Changes in deferred income taxes	121	101
Increase in air traffic liability	93	94
Increase (decrease) in deferred revenue	(147)	13
Other - net	61	(73)
Net cash provided by operating activities	822	638
Property and equipment additions:
Aircraft and aircraft purchase deposits	(353)	(298)
Other flight equipment	(16)	(13)
Other property and equipment	(26)	(29)
Total property and equipment additions	(395)	(340)
Assets constructed for others (Terminal 6 at LAX)	0	(65)
Purchases of marketable securities	(994)	(811)
Sales and maturities of marketable securities	712	701
Proceeds from disposition of assets and changes in restricted deposits	(3)	1
Net cash used in investing activities	(680)	(514)
Cash flows from financing activities:
Long-term debt payments	(139)	(240)
Proceeds from sale-leaseback transactions	0	49
Common stock repurchases	(83)	(52)
Payments of Dividends	(14)	0
Proceeds and tax benefit from issuance of common stock	20	23
Other financing activities	(7)	21
Net cash used in financing activities	(223)	(199)
Net decrease in cash and cash equivalents	(81)	(75)
Cash and cash equivalents at beginning of year	122	102
Cash and cash equivalents at end of the period	41	27
Cash paid during the period for:
Interest (net of amount capitalized)	31	40
Income taxes	100	49
Non-cash transactions:
Assets constructed related to Terminal 6 at LAX	$ 0	$ 2