Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Impairment of Long-Lived Assets (Details)

v3.22.0.1
Summary of Significant Accounting Policies - Impairment of Long-Lived Assets (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Mar. 31, 2020
Dec. 31, 2019
Dec. 31, 2020
Foxwoods [Member]          
Property, Plant and Equipment [Line Items]          
Impairment charges $ 7.0 $ 19.2 $ 45.7   $ 64.8
Jeffersonville [Member]          
Property, Plant and Equipment [Line Items]          
Impairment charges   $ 2.4   $ 37.6