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Acquisitions, Purchase Price Accounting and Pro forma Information -Acquisition of William Hill- Additional Information (Details) $ in Millions, £ in Billions			3 Months Ended	8 Months Ended	12 Months Ended
	Apr. 22, 2021 GBP (£)	Apr. 22, 2021 USD ($)	Dec. 31, 2021 USD ($) state sportsbook	Dec. 31, 2021 USD ($) state sportsbook	Dec. 31, 2021 USD ($) state sportsbook	Dec. 31, 2020 USD ($)	Sep. 08, 2021 GBP (£)
Business Acquisition [Line Items]
Number of states gaming facilities are located | state			16	16	16
Trademarks
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life					15 years
William Hill International
Business Acquisition [Line Items]
Disposal group, consideration | £							£ 2.2
Sports Wagering
Business Acquisition [Line Items]
Number of states gaming facilities are located | state			21	21	21
Online Real Money Gaming Businesses
Business Acquisition [Line Items]
Number of states gaming facilities are located | state			5	5	5
William Hill
Business Acquisition [Line Items]
Cash consideration paid	£ 2.9	$ 3,900
Number of sportsbooks | sportsbook			37	37	37
Increase to other current assets			$ 4
Decrease to assets held for sale			38
Increase to goodwill			(46)
Other noncurrent assets		$ 317	10	$ 10	$ 10
Decrease to other current liabilities			7
Increase to liabilities related to assets held for sale			12
Increase to deferred income taxes			$ 17
Business acquisition, transaction costs					$ 68	$ 8
Revenue since transaction				183
Net income (loss)				$ (415)
William Hill | Trademarks
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life					15 years
William Hill | Technology
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life					6 years
William Hill | User Relationship
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life					3 years
William Hill | Operating Agreements
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life					20 years
William Hill | Rights Value
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life					24 years
William Hill | Sports Wagering
Business Acquisition [Line Items]
Number of states gaming facilities are located | state			8	8	8

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