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Significant Accounting Policies - (Gain) Loss on Disposition of Assets (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Accounting Policies [Abstract]      
Net book value of assets disposed $ 30.8 $ 3.3 $ 36.4
Proceeds from sales (12.8) (4.8) (27.6)
(Gain) loss on disposition of assets $ 18.0 $ (1.5) $ 8.8