Business Combinations - Additional Information (Detail) $ in Millions			12 Months Ended
	Jan. 03, 2022 USD ($)	Oct. 01, 2019	Dec. 31, 2022 USD ($) Country	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Cash payment			$ 2,839	$ 86	$ 319
Senior Notes [Member]
Line of credit facility, interest rate			4.75%
Contractual Backlog [Member]
Finite-Lived Intangible Asset, Useful Life	2 years
Customer Relationships [Member]
Finite-Lived Intangible Asset, Useful Life	15 years		10 years	6 years 4 months 24 days
Trade Names and Trademarks [Member]
Finite-Lived Intangible Asset, Useful Life	15 years		13 years 2 months 12 days	12 years 8 months 12 days
2022 Acquisitions [Member]
Transaction costs			$ 24
2021 Acquisitions [Member]
Net consideration				$ 113
Cash paid at closing				93
Cash payment				7
Business combination accrued consideration				20
APi Acquisition [Member]
Contingent compensation			19	12
Maximum payout of contingent compensation			25	57
Payout of accrued contingent compensation			19	12
Liability for deferred payments			9	$ 15
APi Acquisition [Member] | Minimum [Member]
Contingent compensation arrangements recognized period		3 years
Liability for deferred payments recognition period		1 year
APi Acquisition [Member] | Maximum [Member]
Contingent compensation arrangements recognized period		5 years
Liability for deferred payments recognition period		1 year
Chubb Limited Fire and Security Business [Member]
Cash paid at closing	$ 2,935
Line of credit facility, interest rate	4.75%
Total transaction costs	$ 45
Net revenues from acquisition			2,061
Operating income (loss) from acquisition			$ 18
Number of countries of significant business operations | Country			17
Number of countries expanding operations | Country			20
Chubb Limited Fire and Security Business [Member] | Safety Services [Member]
Provisional goodwill	$ 1,367