Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Income Loss From Operations Before Provision Benefit For Income Taxes [Line Items]
Windfall benefit			$ 12.6	$ 4.6
Pretax income (loss)	$ 24.8	$ 27.5	$ (23.5)	$ 63.2
Cumulative operating income loss period considered			3 years
Valuation allowance	11.2		$ 11.2
Unrecognized income tax benefits	$ 31.7		31.7		$ 30.3
Domestic Deferred Tax Assets [Member]
Income Loss From Operations Before Provision Benefit For Income Taxes [Line Items]
Valuation allowance			$ 11.2