CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:
Net Income	$ 259	$ 141
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	143	136
Stock-based compensation and other	21	17
Changes in certain assets and liabilities:
Changes in deferred income taxes	14	16
Increase in air traffic liability	243	190
Increase (decrease) in deferred revenue	7	12
Other - net	(52)	80
Net cash provided by operating activities	635	592
Property and equipment additions:
Aircraft and aircraft purchase deposits	(255)	(233)
Other flight equipment	(60)	(12)
Other property and equipment	(35)	(13)
Total property and equipment additions	(350)	(258)
Purchases of marketable securities	(628)	(720)
Sales and maturities of marketable securities	398	465
Proceeds from disposition of assets and changes in restricted deposits	(2)	1
Net cash used in investing activities	(582)	(512)
Cash flows from financing activities:
Proceeds from issuance of debt	51	0
Long-term debt payments	(64)	(109)
Common stock repurchases	(83)	(51)
Payments of Dividends	(34)	0
Other financing activities	19	15
Net cash used in financing activities	(111)	(145)
Net decrease in cash and cash equivalents	(58)	(65)
Cash and cash equivalents at beginning of year	80	122
Cash and cash equivalents at end of the period	22	57
Cash paid during the period for:
Interest (net of amount capitalized)	16	21
Income taxes	$ 93	$ 6