Significant Accounting Policies and Basis of Presentation - Guarantees and Indemnifications (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Settlement costs			$ 30.5	$ 0.0
Barstool Acquisition
Disaggregation of Revenue [Line Items]
Settlement costs	$ 30.5
Liabilities associated with this indemnity		$ 70.0	$ 39.5		$ 70.0