Retirement Plans, Postretirement and Postemployment Benefits - Schedule of Amounts Recognized on Consolidated Balance Sheet (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Noncurrent asset pension and postretirement benefits	$ 295.3	$ 179.2
Current pension and postretirement benefits	(6.8)	(14.8)
Noncurrent pension, postretirement and postemployment benefits	(79.0)	(99.6)
Net amount recognized at end of year	209.5	64.8
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Net amount recognized at end of year	(8.9)	(11.4)
Current pension and postretirement benefits	(1.0)	(1.2)
Noncurrent pension, postretirement and postemployment benefits	(7.9)	(10.2)
Net amount recognized at end of year	$ (8.9)	$ (11.4)