CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash flows from operating activities:
Net Income	$ 457	$ 430
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	218	203
Stock-based compensation and other	27	26
Changes in certain assets and liabilities:
Changes in deferred income taxes	27	121
Increase in air traffic liability	139	93
Increase (decrease) in deferred revenue	21	(147)
Other - net	3	96
Net cash provided by operating activities	892	822
Property and equipment additions:
Aircraft and aircraft purchase deposits	(414)	(353)
Other flight equipment	(92)	(16)
Other property and equipment	(53)	(26)
Total property and equipment additions	(559)	(395)
Purchases of marketable securities	(794)	(994)
Sales and maturities of marketable securities	739	712
Proceeds from disposition of assets and changes in restricted deposits	(4)	(3)
Net cash used in investing activities	(618)	(680)
Cash flows from financing activities:
Proceeds from issuance of debt	51	0
Long-term debt payments	(97)	(139)
Common stock repurchases	(242)	(83)
Payments of Dividends	(51)	(14)
Other financing activities	19	13
Net cash used in financing activities	(320)	(223)
Net decrease in cash and cash equivalents	(46)	(81)
Cash and cash equivalents at beginning of year	80	122
Cash and cash equivalents at end of the period	34	41
Cash paid during the period for:
Interest (net of amount capitalized)	26	31
Income taxes	$ 185	$ 100