Supplemental Cash Flow Information (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Supplemental Cash Flow Elements [Abstract]
Payments of interest and commitment fees	$ 282.4	$ 293.9	$ 251.3
Capitalized interest	16.7	47.2	43.2
Cash paid for income taxes	0.8	1.2	0.9
Incurred liabilities for fixed and intangible asset additions	$ 13.0	$ 43.3	$ 79.5

Future cash outflow to pay for purchases of fixed assets that have occurred.

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