Asset Impairment (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Indefinite-lived Intangible Assets [Line Items]
Impairment of intangible assets	$ 0.0		$ 0.0	$ 17.5	$ 0.0
Online Wagering
Indefinite-lived Intangible Assets [Line Items]
Impairment of intangible assets		$ 2.5
Presque Isle | Gaming
Indefinite-lived Intangible Assets [Line Items]
Impairment of intangible assets		12.5
Gaming Rights
Indefinite-lived Intangible Assets [Line Items]
Impairment of intangible assets		15.0
Trademarks
Indefinite-lived Intangible Assets [Line Items]
Impairment of intangible assets		$ 2.5