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Property and Equipment - Depreciation Expense (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Depreciation, Depletion and Amortization [Abstract]      
Depreciation expense, including amortization of assets under finance lease obligations $ 178.8 $ 173.3 $ 172.2