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, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Earnings Per Share [Line Items]
Net income attributable to the Company	$ 146.1	$ 116.0	$ 220.3	$ 162.7
Basic weighted-average shares	103.5	104.1	103.7	104.1
Diluted weighted-average shares	103.8	104.3	104.0	104.4
Basic	$ 1.41	$ 1.11	$ 2.12	$ 1.56
Diluted	$ 1.41	$ 1.11	$ 2.12	$ 1.56
RSUs and PRSUs
Earnings Per Share [Line Items]
Effect of dilutive restricted stock units ("RSUs") and performance restricted stock units ("PRSUs")	0.3	0.2	0.3	0.3