Goodwill and Other Intangible Assets - Narrative (Details) $ in Millions				3 Months Ended		12 Months Ended
	Oct. 01, 2023 USD ($) unit	Oct. 01, 2022 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Schedule Of Goodwill And Intangible Assets [Line Items]
Total  Reduction in Fair Value Recorded						$ 30.0	$ 37.4
Number of reporting units with negative carrying values | unit	4
Intangible asset amortization expense						58.8	56.7	$ 19.6
Fair Value, Nonrecurring
Schedule Of Goodwill And Intangible Assets [Line Items]
Total  Reduction in Fair Value Recorded	$ 30.0		$ 37.4
Northeast segment | Operating segments
Schedule Of Goodwill And Intangible Assets [Line Items]
Total  Reduction in Fair Value Recorded	30.0				$ 37.4	30.0	37.4
West segment | Operating segments
Schedule Of Goodwill And Intangible Assets [Line Items]
Total  Reduction in Fair Value Recorded						0.0	0.0
Interactive | Operating segments
Schedule Of Goodwill And Intangible Assets [Line Items]
Goodwill write-off						231.9
Total  Reduction in Fair Value Recorded						0.0	0.0
Barstool Sports, Inc | Interactive | Operating segments
Schedule Of Goodwill And Intangible Assets [Line Items]
Total  Reduction in Fair Value Recorded						482.9
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Barstool Sports, Inc
Schedule Of Goodwill And Intangible Assets [Line Items]
Pre-tax non-cash loss				$ 923.2
Gaming licenses | Fair Value, Nonrecurring
Schedule Of Goodwill And Intangible Assets [Line Items]
Impairment of other intangible assets	100.6				$ 65.4	$ 100.6	79.0
Total  Reduction in Fair Value Recorded	$ 100.6	$ 13.6	$ 65.4				$ 13.6