Supplemental Cash Flow Disclosures - Non-Cash Investing and Financing Activities (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disclosure Supplemental Cash Flow Disclosures Noncash Investing And Financing Activities [Abstract]
Capital property and equipment acquired on account, but not paid as of December 31	$ 34.0	$ 33.3	$ 13.2
Non Cash Performance Incentive Plan DRP	1.2	0.0	0.0
Performance Incentive Plan	$ 4.9	$ 3.7	$ 2.9