Litigation, Contractual Commitments, and Contingencies - Additional Information (Details) - USD ($) shares in Millions, $ in Millions		3 Months Ended		6 Months Ended		72 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Sep. 01, 2023	Dec. 31, 2018
Other Commitments [Line Items]
Contractual Obligation	[1]	$ 11,364		$ 11,364
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount		32		32
Share-based Payment Arrangement, Accelerated Cost		3		13
Bankruptcy Claims, Amount of Claims Filed				452
Accrued Liabilities		51		51
Self-Insurance Reserve		175		175			$ 173
Convertible Debt [Member]
Other Commitments [Line Items]
Restricted Cash and Cash Equivalents		$ 49		$ 49
Common Stock, Capital Shares Reserved for Future Issuance		8		8
CEC Convertible Notes
Other Commitments [Line Items]
Obligations, Fair Value Disclosure		$ 32		$ 32
VICI Properties, Inc. [Member] | Golf Courses [Member]
Other Commitments [Line Items]
Liabilities, Other than Long-term Debt, Noncurrent		144		144
Debt Instrument, Annual Principal Payment		10		10
Finance Lease, Right-of-Use Asset, Amortization		2	$ 2	5	$ 5
NV Energy Exit
Other Commitments [Line Items]
Business Exit Costs				48
Other Accrued Liabilities, Current		32		32
Business Exit Costs Fair Value				22
Forecast [Member] | NV Energy Exit
Other Commitments [Line Items]
Business Exit Costs						$ 31
Sports Partnership [Member]
Other Commitments [Line Items]
Contractual Obligation		274		274
Pending Litigation [Member]
Other Commitments [Line Items]
Accrued Liabilities		$ 1		$ 1

[1] ⁽¹⁾  Debt principal payments are estimated amounts based on maturity dates and borrowings under our revolving credit facilities, if any. Interest payments are estimated based on the forward-looking LIBOR curve and include the estimated impact of the ten interest rate swap agreements (see Note 6). Actual payments may differ from these estimates.