Restructuring and Transformation Program - Costs Included in Selling, General & Administrative Expenses (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 1.1	$ 28.3	$ 26.3	$ 38.6
Transformation costs	11.5	15.4	48.6	44.2
Total restructuring and transformation costs	12.6	43.7	74.9	82.8
Severance and related costs
Restructuring Cost and Reserve [Line Items]
Transformation costs	0.0	0.0	0.0	0.7
Asset impairment and write-offs
Restructuring Cost and Reserve [Line Items]
Transformation costs	0.7	2.8	16.2	2.8
Other transformation costs
Restructuring Cost and Reserve [Line Items]
Transformation costs	10.8	12.6	32.4	40.7
Severance and related costs
Restructuring Cost and Reserve [Line Items]
Restructuring costs	0.0	17.4	20.3	26.8
Other restructuring costs and related adjustments
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 1.1	$ 10.9	$ 6.0	$ 11.8