Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Operating Activities:
Net loss	$ (305)	$ (950)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	145	150
Gain on sales of assets, net	(6)	(63)
Impairment loss and casualty gain, net	5	694
Equity in losses from investments in affiliates	6	9
Other loss, net	2	3
Share-based compensation expense	10	6
Amortization of deferred financing costs	5	3
Distributions from unconsolidated affiliates	0	5
Deferred Income Taxes	0	2
Changes in operating assets and liabilities	(23)	(17)
Net cash used in operating activities	(161)	(158)
Investing Activities:
Capital expenditures for property and equipment	(13)	(56)
Proceeds from asset dispositions, net	168	207
Contributions to unconsolidated affiliates	(5)	(2)
Insurance proceeds for property damage claims	4	1
Net cash provided by investing activities	154	150
Financing Activities:
Borrowings from credit facilities	0	1,000
Repayments of credit facilities	(761)	(388)
Proceeds from issuance of Senior Secured Note	750	652
Proceeds from Issuance of Mortgage Debt	14	0
Repayments of mortgage debt	(14)	(4)
Debt issuance costs	(15)	(15)
Dividends paid	0	(241)
Distributions to noncontrolling interests	0	(1)
Tax withholdings on share-based compensation	(4)	(6)
Repurchase of common stock	0	(66)
Net cash (used in) provided by financing activities	(30)	931
Net (decrease) increase in cash and cash equivalents and restricted cash	(37)	923
Cash and cash equivalents and restricted cash, beginning of period	981	386
Cash and cash equivalents and restricted cash, end of period	$ 944	$ 1,309