Fair Value Measurements - Narrative (Details) $ in Millions	3 Months Ended			12 Months Ended
	Mar. 31, 2024 USD ($) payment period anniversary	Sep. 30, 2023 USD ($)	Mar. 31, 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	$ 9.2			$ 10.7
Holding loss on equity securities	1.5		$ 3.2
Hitpoint
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Installment amount of contingent consideration	$ 1.0
Number of installments for contingent consideration | anniversary	3
Number of remaining achievement periods | period	1
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	2
Barstool Acquisition
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities associated with this indemnity	$ 70.0	$ 70.0		70.0
Accrued Liabilities | Barstool Acquisition
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities associated with this indemnity	35.0			35.0
Other Noncurrent Liabilities | Barstool Acquisition
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities associated with this indemnity	35.0			35.0
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
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
Pinnacle Retama Partners, LLC
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Ownership interest by parent	75.50%
Retama Nominal Holder, LLC
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Ownership interest	1.00%
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%
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%
Other long-term obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Effective yield							27.00%
Convertible Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	$ 24.2			$ 24.2
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