Stockholders' Equity, Accumulated Other Comprehensive Income (Loss) and Noncontrolling Interest - Changes in Accumulated Other Comprehensive Income/(Loss) Net of Tax by Component (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss) net of tax, beginning balance	$ (165.1)
Accumulated other comprehensive income (loss) net of tax, ending balance	(162.2)
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss) net of tax, beginning balance	(49.1)
Other comprehensive income before reclassifications	1.5
Net current-period other comprehensive income	1.5
Accumulated other comprehensive income (loss) net of tax, ending balance	(47.6)
Benefit Plan Liabilities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss) net of tax, beginning balance	(114.5)
Amounts reclassified from accumulated other comprehensive income into net income	0.7
Net current-period other comprehensive income	0.7
Accumulated other comprehensive income (loss) net of tax, ending balance	(113.8)
Interest Rate Swap [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss) net of tax, beginning balance	(1.5)
Amounts reclassified from accumulated other comprehensive income into net income	0.7
Net current-period other comprehensive income	0.7
Accumulated other comprehensive income (loss) net of tax, ending balance	$ (0.8)