Income Taxes - Deferred Taxes (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Total deferred tax liabilities	$ 66.7	$ 80.0
Income Taxes [Line Items]
Total deferred tax liabilities	66.7	80.0
Other non-current assets
Income Tax Disclosure [Abstract]
Total deferred tax liabilities	23.1	27.4
Income Taxes [Line Items]
Total deferred tax liabilities	23.1	27.4
Deferred tax liabilities
Income Tax Disclosure [Abstract]
Total deferred tax liabilities	89.8	107.4
Income Taxes [Line Items]
Total deferred tax liabilities	$ 89.8	$ 107.4