Fair Value Measurements - Derivative Instruments (Details) $ / shares in Units, € in Millions, $ in Millions				1 Months Ended		3 Months Ended	9 Months Ended
	Sep. 30, 2020 USD ($) interest_rate_swap_agreement $ / shares shares	Sep. 28, 2020 USD ($)	Oct. 06, 2017 USD ($) $ / shares shares	Nov. 02, 2020 USD ($)	Oct. 31, 2020 day	Sep. 30, 2020 USD ($) interest_rate_swap_agreement $ / shares shares	Sep. 30, 2020 USD ($) interest_rate_swap_agreement $ / shares shares	Oct. 09, 2020 EUR (€)	Sep. 28, 2020 EUR (€)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate (as a percent)	4.30%					4.30%	4.30%
Common stock issued (in shares) | shares	8,400,000					8,400,000	8,400,000
Conversion of stock, amount converted	$ 708
Other comprehensive income (loss), cash flow hedge, gain (loss), before reclassification and tax						$ 18
Cash flow hedge gain (loss) to be reclassified within twelve months							$ (62)
Interest Expense
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amounts reclassified from accumulated other comprehensive income						12	12
Other Long Term Liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability	5					5	5
Foreign Exchange Contract | Not Designated as Hedging Instrument
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, notional amount | €									€ 1,300
Derivative, gain (loss) on derivative, net		$ 5
Foreign Exchange Contract | Not Designated as Hedging Instrument | Subsequent Event
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, notional amount | €								€ 536
CRC Credit Agreement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, notional amount	$ 3,000					$ 3,000	$ 3,000
Number of interest rate derivatives held | interest_rate_swap_agreement	10					10	10
Interest Rate Swap | Other Long Term Liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability	$ 109					$ 109	$ 109
Former Caesars 5% Convertible Notes | Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate (as a percent)	5.00%		5.00%			5.00%	5.00%
Common stock issued (in shares) | shares			0.014
Common stock, par value (in dollars per share) | $ / shares			$ 1.17
Debt instrument, convertible, conversion price (in dollars per share) | $ / shares	$ 193.00		$ 1.00			$ 193.00	$ 193.00
Debt conversion, converted instrument, amount	$ 487
Other (loss) income	34					$ 87
Convertible debt	607					607	$ 607
Common stock held in trust	$ 10					10	10
Debt instrument, term	4 years		7 years
Debt instrument, face amount	$ 574		$ 1,100			$ 574	$ 574
Debt instrument, interest rate, increase (decrease)	6.00%
Former Caesars 5% Convertible Notes | Senior Notes | Subsequent Event
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate (as a percent)				5.00%	5.00%
Debt instrument, convertible, threshold percentage of stock price trigger					140.00%
Debt instrument, convertible, threshold trading days | day					20
Debt instrument, convertible, threshold consecutive trading days | day					30
Debt conversion, converted instrument, amount				$ 281
Debt instrument, face amount				$ 328