Fair Value Measurements - Narrative (Details) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024 USD ($) anniversary period payment	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) anniversary period payment	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)	Apr. 07, 2023 USD ($)	Jul. 01, 2021	Feb. 28, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	$ 8.2		$ 8.2		$ 10.7
Equity securities, unrealized gain (loss)	3.0	$ (11.6)	(2.4)	$ (8.5)
Hitpoint
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Installment amount of contingent consideration	$ 1.0		$ 1.0
Number of installments for contingent consideration | anniversary	3		3
Number of remaining achievement periods | period	0		0
Plainridge Park Casino
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Period of actual earnings used to calculate contingent consideration			10 years
Number of remaining annual payments | payment	1		1
Barstool Acquisition
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities associated with this indemnity		$ 70.0	$ 39.5		70.0
Retama Development Corporation | Promissory Notes | Other Assets | Pinnacle Retama Partners, LLC
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Promissory notes	$ 7.9		7.9		7.9
Retama Development Corporation | Local Government Corporation Bonds | Other Assets | Pinnacle Retama Partners, LLC
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Promissory notes	$ 6.7		$ 6.7		6.7
Pinnacle Retama Partners, LLC
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Ownership interest by parent	75.50%		75.50%
Retama Nominal Holder, LLC
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Ownership interest	1.00%		1.00%
Convertible Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	$ 24.2		$ 24.2		$ 24.2
Senior Notes | 5.625% Notes due 2027
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate	5.625%		5.625%		5.625%
Senior Notes | Senior Unsecured Notes Due 2029
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate	4.125%		4.125%		4.125%		4.125%
Other long-term obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Effective yield								27.00%
Debt Securities | Secured Convertible Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate						12.00%
Debt securities, available-for-sale						$ 20.0