Revenue Recognition - Summary of Net Revenues Disaggregated Type of Revenue and Reportable Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Net revenues	$ 2,685	$ 1,443	$ 6,979	$ 2,043
Accounts receivable, net	438		438		$ 342
Casino and pari-mutuel commissions
Disaggregation of Revenue [Line Items]
Net revenues	1,510	981	4,308	1,422
Contract receivable	141		141		137
Food and beverage
Disaggregation of Revenue [Line Items]
Net revenues	347	127	797	190
Hotel
Disaggregation of Revenue [Line Items]
Net revenues	511	200	1,122	257
Food and beverage and hotel
Disaggregation of Revenue [Line Items]
Contract receivable	91		91		25
Other
Disaggregation of Revenue [Line Items]
Net revenues	317	135	752	174
Contract receivable	206		206		$ 180
Corporate and other
Disaggregation of Revenue [Line Items]
Net revenues	1	4	10	8
Corporate and other | Casino and pari-mutuel commissions
Disaggregation of Revenue [Line Items]
Net revenues	0	0	0	0
Corporate and other | Food and beverage
Disaggregation of Revenue [Line Items]
Net revenues	0	0	0	0
Corporate and other | Hotel
Disaggregation of Revenue [Line Items]
Net revenues	0	0	0	0
Corporate and other | Other
Disaggregation of Revenue [Line Items]
Net revenues	1	4	10	8
Las Vegas | Operating Segment
Disaggregation of Revenue [Line Items]
Net revenues	1,017	304	2,369	304
Las Vegas | Operating Segment | Casino and pari-mutuel commissions
Disaggregation of Revenue [Line Items]
Net revenues	329	122	870	122
Las Vegas | Operating Segment | Food and beverage
Disaggregation of Revenue [Line Items]
Net revenues	221	52	476	52
Las Vegas | Operating Segment | Hotel
Disaggregation of Revenue [Line Items]
Net revenues	303	79	660	79
Las Vegas | Operating Segment | Other
Disaggregation of Revenue [Line Items]
Net revenues	164	51	363	51
Regional | Operating Segment
Disaggregation of Revenue [Line Items]
Net revenues	1,492	1,055	4,173	1,632
Regional | Operating Segment | Casino and pari-mutuel commissions
Disaggregation of Revenue [Line Items]
Net revenues	1,096	825	3,241	1,247
Regional | Operating Segment | Food and beverage
Disaggregation of Revenue [Line Items]
Net revenues	125	74	318	137
Regional | Operating Segment | Hotel
Disaggregation of Revenue [Line Items]
Net revenues	208	121	462	178
Regional | Operating Segment | Other
Disaggregation of Revenue [Line Items]
Net revenues	63	35	152	70
Caesars Digital | Operating Segment
Disaggregation of Revenue [Line Items]
Net revenues	96	39	221	58
Caesars Digital | Operating Segment | Casino and pari-mutuel commissions
Disaggregation of Revenue [Line Items]
Net revenues	85	34	197	53
Caesars Digital | Operating Segment | Food and beverage
Disaggregation of Revenue [Line Items]
Net revenues	0	0	0	0
Caesars Digital | Operating Segment | Hotel
Disaggregation of Revenue [Line Items]
Net revenues	0	0	0	0
Caesars Digital | Operating Segment | Other
Disaggregation of Revenue [Line Items]
Net revenues	11	5	24	5
Managed and Branded | Operating Segment
Disaggregation of Revenue [Line Items]
Net revenues	79	41	206	41
Managed and Branded | Operating Segment | Casino and pari-mutuel commissions
Disaggregation of Revenue [Line Items]
Net revenues	0	0	0	0
Managed and Branded | Operating Segment | Food and beverage
Disaggregation of Revenue [Line Items]
Net revenues	1	1	3	1
Managed and Branded | Operating Segment | Hotel
Disaggregation of Revenue [Line Items]
Net revenues	0	0	0	0
Managed and Branded | Operating Segment | Other
Disaggregation of Revenue [Line Items]
Net revenues	$ 78	$ 40	$ 203	$ 40