Supplemental Cash Flow Information (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Supplemental Cash Flow Elements [Abstract]
Payments of interest and commitment fees	$ 318.6	$ 276.2	$ 236.9
Capitalized interest	47.2	43.2	18.1
Cash paid for income taxes	1.4	0.9	1.0
Incurred liabilities for fixed and intangible asset additions	$ 56.3	$ 172.7	$ 93.5