Business Combinations - Additional Information (Detail) $ in Millions			3 Months Ended	6 Months Ended		12 Months Ended
	Jan. 03, 2022 USD ($)	Oct. 01, 2019	Jun. 30, 2022 USD ($)	Jun. 30, 2022 USD ($) Country	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Cash payment				$ 2,875	$ 12
Senior Notes [Member]
Line of credit facility, interest rate				4.75%
Contractual Backlog [Member]
Finite-Lived Intangible Asset, Useful Life	1 year
Customer Relationships [Member]
Finite-Lived Intangible Asset, Useful Life	15 years			11 years 6 months		6 years 4 months 24 days
Trade Names and Trademarks [Member]
Finite-Lived Intangible Asset, Useful Life	15 years			13 years 9 months 18 days		12 years 8 months 12 days
2022 Acquisitions [Member]
Transaction costs			$ 0	$ 24
2021 Acquisitions [Member]
Net consideration				113
Aggregate cash consideration				93
Cash payment				7
Business combination accrued consideration			20	20
Goodwill, expected tax deduction						$ 48
APi Acquisition [Member]
Contingent compensation			16	16		12
Maximum payout of contingent compensation			20	20		57
Payout of accrued contingent compensation			16	16		12
Liability for deferred payments			15	15		$ 15
APi Acquisition [Member] | Minimum [Member]
Contingent compensation arrangements recognized period		3 years
Liability for deferred payments recognition period		12 months
APi Acquisition [Member] | Maximum [Member]
Contingent compensation arrangements recognized period		5 years
Liability for deferred payments recognition period		24 months
Chubb Limited Fire and Security Business [Member]
Net consideration				2,899
Aggregate cash consideration				2,935
Line of credit facility, interest rate	4.75%
Total transaction costs	$ 44
Net revenues from acquisition			560	1,103
Operating income (loss) from acquisition			$ 4	$ 14
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	$ 1,229