Income Taxes - Components of Earnings Before Income Taxes and Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
United States	$ 605.0	$ 781.6	$ 593.0
Foreign, principally Australia, Canada, New Zealand and the U.K.	580.1	545.4	382.1
Earnings before income taxes	1,185.1	1,327.0	975.1
Federal Current	(21.4)	109.1	44.6
Federal Deferred	112.9	(3.5)	(151.6)
Total Provision for income taxes, Federal	91.5	105.6	(107.0)
State and local Current	(15.4)	114.3	50.6
State and local Deferred	43.0	(83.5)	(11.6)
Total Provision for income taxes, State and local	27.6	30.8	39.0
Foreign Current	212.8	196.6	108.8
Foreign Deferred	(112.8)	(122.0)	(20.7)
Total Provision for income taxes, Foreign	100.0	74.6	88.1
Total provision for income taxes	$ 219.1	$ 211.0	$ 20.1