Earnings Per Share (Schedule of Earnings Per Share) (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended
		Mar. 31, 2025	Mar. 31, 2024
Earnings Per Share [Line Items]
Net income attributable to the Company		$ 74.2	$ 46.7
Basic weighted-average shares		103.8	104.1
Diluted weighted-average shares		104.2	104.4
Basic	[1]	$ 0.72	$ 0.45
Diluted	[1]	$ 0.71	$ 0.45
RSUs and PRSUs
Earnings Per Share [Line Items]
Effect of dilutive restricted stock units ("RSUs") and performance restricted stock units ("PRSUs")		0.4	0.3

[1] Net income per share may not recalculate due to rounding.