Supplemental Cash Flow Information - Schedule of Noncash Investing and Financing Activities (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Supplemental Cash Flow Elements [Abstract]
Right-of-use assets obtained in exchange for new finance lease liabilities	$ 3.6	$ 115.1
Right-of-use assets obtained in exchange for new operating lease liabilities	6.1	6.0
Accrued liabilities for purchases of property, plant and equipment	24.5	28.7
Remeasurement of operating lease right-of-use assets	0.3	$ (6.2)
Remeasurement of finance lease right-of-use assets	$ 0.4