Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements Narrative (Details)

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Fair Value Measurements Narrative (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
Jeffersonville [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Impairment charges   $ 2.4   $ 37.6  
Foxwoods [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Impairment charges $ 7.0 $ 19.2 $ 45.7   $ 64.8