Acquisitions and Dispositions - Narrative (Details) - USD ($)		1 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended		12 Months Ended
	Feb. 17, 2023	Aug. 07, 2023	Sep. 30, 2023	Aug. 07, 2023	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Aug. 08, 2023
Business Acquisition [Line Items]
Gain on disposal of business					$ (923,200,000)	$ 0
Barstool Sports, Inc | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Business Acquisition [Line Items]
Disposal group, percentage of ownership interest sold								100.00%
Cash consideration per share (in dollars per share)								$ 1
Right to receive gross proceeds, percent								50.00%
Pre-tax non-cash loss			$ 923,200,000
Minimum | Barstool Sports, Inc | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Business Acquisition [Line Items]
Goodwill and intangible assets write offs			714,800,000
Barstool Acquisition
Business Acquisition [Line Items]
Business acquisition, percentage of voting interests acquired	64.00%
Purchase price	$ 405,500,000
Liabilities incurred on acquisition	$ 23,800,000
Ownership interest before acquisition	36.00%
Ownership interest after acquisition	100.00%							100.00%
Business combination, fair value	$ 660,000,000
Business acquisition, equity interest Issued or issuable (in shares)	2,442,809
Payments to acquire businesses, gross	$ 315,300,000
Fair value of investment	171,100,000
Gain on transaction	66,500,000
Gain on disposal of business	$ 16,900,000
Goodwill tax deductible amount			$ 0		$ 0
Goodwill, percent of net assets acquired			35.10%		35.10%
Revenue		$ 18,300,000		$ 99,200,000
Loss recorded		$ 7,800,000		$ 23,900,000
Liabilities associated with this indemnity					$ 70,000,000		$ 0
Barstool Acquisition | Minimum
Business Acquisition [Line Items]
Intangible asset, useful life			2 years		2 years
Barstool Acquisition | Maximum
Business Acquisition [Line Items]
Intangible asset, useful life			5 years		5 years