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Other Assets - Accounts Receivable, Net (Details) - USD ($)
$ in Millions
15 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Accounts Receivable, Net    
Allowance for credit losses $ 0.2 $ 0.2
Allowance for lease related receivables 0.1 $ 0.1
Maximum    
Accounts Receivable, Net    
Increase (decrease) in allowance for credit losses related to accounts receivable $ (0.1)