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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2021
Income Tax Disclosure [Abstract]  
Schedule of Components of Income Tax Expense The following is a summary of the provision for income taxes for the years ended December 31, 2021, 2020 and 2019 (in millions):
 For the Year Ended December 31,
 202120202019
Current expense:   
State$0.5 $0.1 $0.4 
Deferred provision:   
State0.2 0.2 0.1 
Income taxes$0.7 $0.3 $0.5