Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Jun. 30, 2020	Dec. 31, 2021	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense of intangible assets		$ 34.0	$ 36.1
Estimated Future Amortization Expense by Fiscal Year [Abstract]
2018		26.2
2019		25.1
2020		25.0
2021		25.0
2022		23.8
After 2022		191.0
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	$ 108.9		108.9
Goodwill, Impairment Loss	270.3		270.3
Deferred Income Taxes and Tax Credits	$ 90.3
Accumulated amortization		$ 10.0	$ 9.5

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of deferred income tax expense (benefit) and income tax credits.

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Amount of accumulated amortization of right-of-use asset from finance lease.

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

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