Restructuring and Transformation Program - Costs Included in Selling, General & Administrative Expenses (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 5.0	$ 3.1
Transformation costs	17.0	8.5
Total restructuring and transformation costs	22.0	11.6
Severance and related costs
Restructuring Cost and Reserve [Line Items]
Transformation costs	0.4	1.9
Other Transformation
Restructuring Cost and Reserve [Line Items]
Transformation costs	16.6	6.6
Severance and related costs
Restructuring Cost and Reserve [Line Items]
Restructuring costs	4.0	2.5
Other Restructuring Costs
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 1.0	$ 0.6