Business Combinations - Additional Information (Detail) $ in Millions		3 Months Ended
	Oct. 01, 2019	Mar. 31, 2023 USD ($) Country	Dec. 31, 2022 USD ($)
APi Acquisition [Member]
Contingent compensation		$ 21	$ 19
Maximum payout of contingent compensation		31	25
Payout of accrued contingent compensation		21	19
Liability for deferred payments		$ 11	$ 9
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	2 years
Chubb Limited Fire and Security Business [Member]
Number of countries of significant business operations | Country		17
Number of countries expanding operations | Country		20