CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net Income	$ (877.0)	$ 588.0
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	320.0	317.0
Stock-based compensation and other	14.0	20.0
Restructuring Charges	322.0	0.0
Changes in certain assets and liabilities:
Changes in deferred tax provision	(220.0)	187.0
Increase in deferred revenue	193.0	97.0
Pension contribution	0.0	(65.0)
Other - net	(150.0)	(7.0)
Net cash provided by operating activities	116.0	1,381.0
Property and equipment additions:
Aircraft and aircraft purchase deposits	(61.0)	(286.0)
Other flight equipment	(49.0)	(125.0)
Other property and equipment	(94.0)	(116.0)
Total property and equipment additions, including capitalized interest	(204.0)	(527.0)
Purchases of marketable securities	(2,092.0)	(1,446.0)
Sales and maturities of marketable securities	1,520.0	1,228.0
Other investing activities	9.0	37.0
Net cash used in investing activities	(767.0)	(708.0)
Cash flows from financing activities:
Proceeds from issuance of debt	2,581.0	356.0
Long-term debt payments	(238.0)	(129.0)
Common stock repurchases	(31.0)	(752.0)
Dividends paid	(45.0)	(53.0)
Other financing activities	19.0	40.0
Net cash provided by (used in) financing activities	2,286.0	(538.0)
Net increase in cash, cash equivalents, and restricted cash	1,635.0	135.0
Cash, cash equivalents, and restricted cash at beginning of year	232.0	114.0
Cash, cash equivalents, and restricted cash at end of the period	1,867.0	249.0
Cash paid during the period for:
Interest (net of amount capitalized)	38.0	48.0
Income taxes	0.0	2.0
Cash and cash equivalents	1,855.0	237.0
Restricted cash included in Prepaid expenses, assets held-for-sale and other current assets	$ 12.0	$ 12.0