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Income Taxes (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Company's effective tax rate	25.70%	(9.40%)	23.90%	45.20%
Increase in unrecognized tax benefits	$ (0.7)		$ (1.1)
Increase in unrecognized tax benefits that would impact effective tax rate	0.8		1.2
Unrecognized tax benefits, interest expense	0.1		0.2
Unrecognized tax benefits, income tax penalties and interest accrued	2.0		2.0		$ 2.0
Reasonable possible decrease in unrecognized tax benefits during the next twelve months	0.5		0.5
Indemnification liability for uncertain tax benefits	$ 8.5		$ 8.5

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- Definition

Increase (Decrease) in Unrecognized Tax Benefits that Would Impact Effective Tax Rate

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Unrecognized Tax Benefits, Interest Expense

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Publisher FASB
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The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.

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Amount of unrecognized tax benefits.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Amount of increase (decrease) in unrecognized tax benefits attributable to uncertain tax positions taken in tax returns.

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