Acquisitions and Dispositions - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended	3 Months Ended		12 Months Ended
	Feb. 17, 2023	Mar. 31, 2023	Mar. 31, 2024	Sep. 30, 2023	Dec. 31, 2023	Aug. 08, 2023
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						$ 1
Right to receive gross proceeds, percent						50.00%
Pre-tax non-cash loss				$ 923.2
Goodwill and intangible assets write offs				714.8
Barstool Acquisition
Business Acquisition [Line Items]
Business acquisition, percentage of voting interests acquired	64.00%
Purchase price	$ 405.5
Liabilities incurred on acquisition	$ 23.8
Business acquisition, equity interest Issued or issuable (in shares)	2,442,809
Payments to acquire businesses, gross	$ 315.3
Ownership interest before acquisition	36.00%
Business combination, fair value	$ 660.0
Fair value of investment	171.1
Gain on transaction	66.5
Gain on disposal of business	$ 16.9
Revenue		$ 28.2
Net loss		$ 3.3
Liabilities associated with this indemnity			$ 70.0	$ 70.0	$ 70.0