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Stock-Based Compensation - Expense (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Selling, general and administrative expense and operating expenses (excluding depreciation and amortization)        
Stock-Based Compensation        
Non-cash compensation expense $ 6.4 $ 4.0 $ 12.1 $ 7.1