Fair Value Measurements - Items Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions			12 Months Ended
		Oct. 01, 2018	Dec. 31, 2018		Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3	[1],[2],[3]	$ 0
Accrued Liabilities			$ 45		$ 112
Liability [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3	[1]	(73)
Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments			21		33
Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Assets [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments			0		8
Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Assets [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments			21		25
Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Assets [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments			0		0
Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Assets [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments					8
Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Assets [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments					8
Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Assets [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments					0
Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Assets [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments					0
Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Assets [Member] | US Treasury and Government [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments			15		25
Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Assets [Member] | US Treasury and Government [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments			0		0
Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Assets [Member] | US Treasury and Government [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments			15		25
Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Assets [Member] | US Treasury and Government [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments			0		0
Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Liability [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability			391		1,128
Obligations, Fair Value Disclosure			45		112
Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Liability [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability			0		0
Obligations, Fair Value Disclosure			0		0
Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Liability [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability			391		0
Obligations, Fair Value Disclosure					0
Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Liability [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements			(29)		112
Derivative Liability			0		1,128
Obligations, Fair Value Disclosure					112
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value			0	[2]	112	$ 0
CEC Convertible Notes | Liability [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3	[1],[2]	$ (738)
CEC Convertible Notes | Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Liability [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability			324		1,016
CEC Convertible Notes | Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Liability [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability			0		0
CEC Convertible Notes | Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Liability [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability			324		0
CEC Convertible Notes | Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Liability [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements	[2]		4		1,080
Derivative Liability			0		1,016
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	[2]		0		$ 1,016	$ 0
Interest Rate Swap [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset			6
Interest Rate Swap [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Assets [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset			0
Interest Rate Swap [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Assets [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset			6
Interest Rate Swap [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Assets [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset			0
Interest Rate Swap [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Liability [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset			22
Interest Rate Swap [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Liability [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset			0
Interest Rate Swap [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Liability [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset			22
Interest Rate Swap [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Liability [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset			$ 0

[1] Due to a change in valuation methodology of the CEC Convertible Notes on October 1, 2018, the derivative liability of the CEC Convertible Notes and the Disputed claims liability were transferred to Level 2.

[2] The CEC Convertible Notes were remeasured at fair value and issued on the Effective Date with a debt component and a derivative liability component. See Note 12 for further details on the debt portion of the CEC Convertible Notes. The derivative portion of the CEC Convertible Notes is a recurring fair value measurement, see below.

[3] The VICI Call Right was remeasured at fair value and then transferred to Accrued expenses and other current liabilities on the Balance Sheet upon settlement on the Effective Date because it is an option related to real estate and not a derivative. See Note 9