Revenue Recognition - Summary of Activity Related to Contract and Contract Related Liabilities (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Outstanding Chip Liability
Disaggregation of Revenue [Line Items]
Balance at January 1	$ 32	$ 10
March 31	28	7
Increase / (decrease)	(4)	(3)
Caesars Rewards
Disaggregation of Revenue [Line Items]
Balance at January 1	94	13
March 31	93	12
Increase / (decrease)	(1)	(1)
Customer Deposits and Other Deferred Revenue
Disaggregation of Revenue [Line Items]
Balance at January 1	278	172
March 31	298	172
Increase / (decrease)	$ 20	$ 0

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130531-203044

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130532-203044

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130549-203045

Name:	us-gaap_ContractWithCustomerLiabilityCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant