Supplemental Cash Flow Information - Schedule of Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024		Dec. 31, 2024		Dec. 31, 2023	[1]
Supplemental Cash Flow Elements [Abstract]
Interest paid	$ 10.0	$ 10.3
Non-cash investing and financing activities (included in Accounts payable):
Unpaid purchases of property and equipment	22.1	19.5
Supplemental lease disclosures:
Cash paid for amounts included in the measurement of operating lease liabilities	1.9	2.1
Finance lease liabilities arising from obtaining finance lease assets	0.3	1.0
Components of cash, cash equivalents and restricted cash:
Cash and cash equivalents	21.3	101.6		$ 18.4	[1]
Restricted cash included in Other assets	20.0	18.3		19.5	[2]
Total cash, cash equivalents and restricted cash presented on our Statements of Consolidated Cash Flows	$ 41.3	$ 119.9	[1]	$ 37.9		$ 100.7

[1] Adjusted to reflect the retrospective change in inventory valuation methodology from LIFO to WAC. See Note 14 for further discussion.

[2] Adjusted to reflect the retrospective change in inventory valuation methodology from LIFO to WAC. See Note 14 for further discussion.