Fair Value Measurements - Narrative (Details) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) payment period anniversary	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Apr. 07, 2023 USD ($)	Jul. 01, 2021	Feb. 28, 2021	Jan. 19, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities		$ 10.7	$ 17.1
Holding (losses) gains on equity securities		$ (6.4)	(69.9)	$ (24.9)
Retama Nominal Holder, LLC
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Ownership interest		1.00%
HitPoint Inc. And Lucky Point Inc.
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
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
Hitpoint
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of remaining achievement periods | period		1
Barstool Acquisition
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities associated with this indemnity	$ 70.0	$ 70.0
Barstool Acquisition | Accrued Liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities associated with this indemnity		35.0
Barstool Acquisition | Other Noncurrent Liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities associated with this indemnity		35.0
Retama Development Corporation | Pinnacle Retama Partners, LLC | Promissory Notes | Other Noncurrent Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Promissory notes		7.9	7.9
Retama Development Corporation | Pinnacle Retama Partners, LLC | Local Government Corporation Bonds | Other Noncurrent Assets
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%
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 | 4.125% Notes due 2029
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate		4.125%				4.125%
Other long-term obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate							27.00%
Convertible Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt		$ 24.2
Debt Securities | Secured Convertible Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate					12.00%
Available-for-sale debt securities					$ 20.0