CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net Income	$ 141	$ 109
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	136	129
Stock-based compensation and other	17	6
Changes in certain assets and liabilities:
Changes in fair values of open fuel hedge contracts	39	45
Changes in deferred income taxes	16	58
Increase in air traffic liability	190	178
Increase (decrease) in deferred revenue	12	4
Increase (decrease) in other long-term liabilities	(5)	5
Other - net	46	(79)
Net cash provided by operating activities	592	455
Property and equipment additions:
Aircraft and aircraft purchase deposits	(233)	(228)
Other flight equipment	(12)	(7)
Other property and equipment	(13)	(20)
Total property and equipment additions	(258)	(255)
Assets constructed for others (Terminal 6 at LAX)	0	(50)
Purchases of marketable securities	(720)	(537)
Sales and maturities of marketable securities	465	430
Proceeds from disposition of assets and changes in restricted deposits	1	1
Net cash used in investing activities	(512)	(411)
Cash flows from financing activities:
Long-term debt payments	(109)	(165)
Proceeds from sale-leaseback transactions	0	49
Common stock repurchases	(51)	(26)
Proceeds and tax benefit from issuance of common stock	13	14
Other financing activities	2	17
Net cash used in financing activities	(145)	(111)
Net decrease in cash and cash equivalents	(65)	(67)
Cash and cash equivalents at beginning of year	122	102
Cash and cash equivalents at end of the period	57	35
Cash paid during the period for:
Interest (net of amount capitalized)	21	25
Income taxes	6	(3)
Non-cash transactions:
Assets constructed related to Terminal 6 at LAX	$ 0	$ 26