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Operating Expenses (Schedule of Depreciation and Amortization Expenses) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Operating Expenses        
Depreciation $ 25.5 $ 7.9 $ 37.0 $ 15.6
Amortization 84.1 16.4 108.8 32.9
Total depreciation and amortization expenses $ 109.6 $ 24.3 $ 145.8 $ 48.5