Restructuring and Transformation Program - Costs Included in Selling, General & Administrative Expenses (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 2.7	$ 10.9	$ 6.6	$ 13.8
Transformation costs	13.9	10.1	28.4	20.8
Total restructuring and transformation costs	16.6	21.0	35.0	34.6
Severance and related costs
Restructuring Cost and Reserve [Line Items]
Transformation costs	2.9	3.1	5.1	3.1
Other Transformation
Restructuring Cost and Reserve [Line Items]
Transformation costs	11.0	7.0	23.3	17.7
Severance and related costs
Restructuring Cost and Reserve [Line Items]
Restructuring costs	1.1	8.5	4.5	11.2
Other
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 1.6	$ 2.4	$ 2.1	$ 2.6