Restructuring and Transformation Program - Costs Included in Selling, General & Administrative Expenses (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 0.8	$ 1.0	$ 3.9	$ 2.9
Transformation costs	6.0	5.2	14.5	10.7
Total restructuring and transformation costs	6.8	6.2	18.4	13.6
Severance and related costs
Restructuring Cost and Reserve [Line Items]
Transformation costs	0.3	0.0	2.2	0.0
Other Transformation
Restructuring Cost and Reserve [Line Items]
Transformation costs	5.7	5.2	12.3	10.7
Severance and related costs
Restructuring Cost and Reserve [Line Items]
Restructuring costs	0.9	0.8	3.4	2.7
Other
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ (0.1)	$ 0.2	$ 0.5	$ 0.2