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Supplemental Cash Flow Information (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Supplemental Cash Flow Elements [Abstract]    
Payments of interest and commitment fees $ 69.8 $ 35.4
Interest paid, capitalized 2.0 0.7
Incurred liabilities for fixed and intangible asset additions $ 45.0 $ 27.1