Supplemental Cash Flow Information (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Supplemental Cash Flow Elements [Abstract]
Payments of interest and commitment fees	$ 196.3	$ 189.2
Interest paid, capitalized	29.2	11.2
Incurred liabilities for fixed and intangible asset additions	$ 121.4	$ 67.6