Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Net Cash Provided by Operating Activities
Net Cash Provided by Operating Activities	$ 4,226	$ 4,381
Property and equipment additions:
Flight equipment, including advance payments	(1,644)	(1,177)
Ground property and equipment, including technology	(273)	(328)
Purchase of short-term investments	(866)	(613)
Redemption of short-term investments	1,051	334
Other, net	19	17
Net cash used in investing activities	(1,713)	(1,767)
Cash Flows from Financing Activities:
Payments on long-term debt and capital lease obligations	(1,149)	(634)
Repurchase of common stock	(1,801)	(1,350)
Cash dividends	(210)	(147)
Fuel card obligation	4	(320)
Payments on hedge derivative contracts	(205)	0
Proceeds from hedge derivative contracts	46	0
Proceeds from short-term obligations	68	0
Proceeds from long-term obligations	450	41
Other, net	(26)	1
Net cash used in financing activities	(2,823)	(2,409)
Net (Decrease) Increase in Cash and Cash Equivalents	(310)	205
Cash and cash equivalents at beginning of period	1,972	2,088
Cash and cash equivalents at end of period	1,662	2,293
Non-Cash Transactions:
Treasury stock contributed to our qualified defined benefit pension plans	350	0
Flight equipment acquired under capital leases	$ 50	$ 65