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Supplemental Cash Flow Information (Narrative) (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Supplemental Cash Flow Elements [Abstract]    
Payments of interest and commitment fees $ 114.6 $ 78.0
Interest paid, capitalized 5.9 1.4
Incurred liabilities for fixed and intangible asset additions $ 35.5 $ 71.5