Acquisitions and Dispositions - Summary of Final Allocation of Purchase Price to Fair Value of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Goodwill	[1]	$ 2,465.1	$ 2,394.8	$ 2,090.2
Larson [Member]
Business Acquisition [Line Items]
Accounts receivable			42.3
Inventories			49.8
Property, plant and equipment			66.6
Goodwill			307.0
Identifiable intangible assets			313.0
Operating lease assets			6.2
Other assets			3.7
Total assets			788.6
Accounts payable			6.6
Other current liabilities and accruals			32.1
Other non-current liabilities			32.4
Net assets acquired	[2]		$ 717.5

[1] Net of accumulated impairment losses of $399.5 million in the Outdoors & Security segment.

[2] Net assets exclude $0.4 million of cash transferred to the Company as the result of the Larson acquisition.