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Goodwill and Other Intangible Assets - Reporting Units With Negative Carrying Values (Details)
$ in Millions
Oct. 01, 2019
USD ($)
Northeast segment | Hollywood Casino at Charles Town Races  
Goodwill [Line Items]  
Reporting unit with negative carrying amount, goodwill $ 8.7
Northeast segment | Plainridge Park Casino  
Goodwill [Line Items]  
Reporting unit with negative carrying amount, goodwill 6.3
Midwest segment | Ameristar Council Bluffs  
Goodwill [Line Items]  
Reporting unit with negative carrying amount, goodwill $ 36.2