CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net Income	$ (131)	$ (232)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	97	108
Stock-based compensation and other	12	9
Special items - Impairment charges and other	18	160
Restructuring Charges	11	0
Changes in certain assets and liabilities:
Changes in deferred tax provision	(39)	(44)
Increase (Decrease) in Contract with Customer, Liability	224	210
Increase in deferred revenue	48	33
Other - net	(73)	(211)
Net cash provided by operating activities	167	33
Property and equipment additions:
Aircraft and aircraft purchase deposits	(3)	(57)
Other flight equipment	(11)	(35)
Other property and equipment	(13)	(27)
Total property and equipment additions, including capitalized interest	(27)	(119)
Purchases of marketable securities	(1,243)	(527)
Sales and maturities of marketable securities	732	511
Other investing activities	(5)	(8)
Net cash used in investing activities	(543)	(127)
Cash flows from financing activities:
Proceeds from issuance of debt	189	825
Long-term debt payments	(115)	(60)
Common stock repurchases	0	(31)
Dividends paid	0	(45)
Other financing activities	8	(5)
Net cash provided by (used in) financing activities	82	684
Net increase in cash, cash equivalents, and restricted cash	(294)	590
Cash, cash equivalents, and restricted cash at beginning of year	1,386	232
Cash, cash equivalents, and restricted cash at end of the period	1,092	822
Cash paid during the period for:
Interest (net of amount capitalized)	50	9
Income taxes	0	0
Cash and cash equivalents	1,076	811
Restricted cash included in Prepaid expenses, assets held-for-sale and other current assets	$ 16	$ 11