Earnings Per Share (Schedule of Earnings Per Share) (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Earnings Per Share [Line Items]
Net income attributable to the Company	$ 116.0	$ 138.5	$ 162.7	$ 184.4
Basic weighted-average shares	104.1	104.3	104.1	104.4
Diluted weighted-average shares	104.3	104.5	104.4	104.6
Basic	$ 1.11	$ 1.33	$ 1.56	$ 1.77
Diluted	$ 1.11	$ 1.33	$ 1.56	$ 1.76
RSUs and PRSUs
Earnings Per Share [Line Items]
Effect of dilutive restricted stock units ("RSUs") and performance restricted stock units ("PRSUs")	0.2	0.2	0.3	0.2