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, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share [Abstract]
Net income attributable to the Company	$ 138.5	$ 108.8	$ 184.4	$ 206.7
Basic weighted-average shares	104.3	107.9	104.4	109.1
Effect of dilutive restricted stock units (“RSUs”)	0.2	0.2	0.2	0.3
Diluted weighted-average shares	104.5	108.1	104.6	109.4
Basic	$ 1.33	$ 1.01	$ 1.77	$ 1.89
Diluted	$ 1.33	$ 1.01	$ 1.76	$ 1.89