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Comprehensive Loss - Reclassifications from Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Accumulated Other Comprehensive Income Loss [Line Items]        
Net realized loss $ (7.4) $ (3.8) $ (21.3) $ (11.8)
Reclassifications from Accumulated Other Comprehensive Loss        
Accumulated Other Comprehensive Income Loss [Line Items]        
Reclassifications before tax       0.7
Income tax benefit       0.2
Reclassifications, net of tax       0.5
Reclassifications from Accumulated Other Comprehensive Loss | Interest Rate Collars: Net Realized Loss        
Accumulated Other Comprehensive Income Loss [Line Items]        
Net realized loss       $ 0.7