Goodwill and Intangibles - Summary of Changes In Carrying Amounts of Goodwill By Reportable Segments (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2023 USD ($)
Goodwill [LineItems]
Beginning Balance	$ 2,382
Acquisitions	31
Foreign currency translation	31
Ending Balance	2,444
Safety Services [Member]
Goodwill [LineItems]
Beginning Balance	2,201
Acquisitions	31
Foreign currency translation	31
Ending Balance	2,263
Specialty Services [Member]
Goodwill [LineItems]
Beginning Balance	181
Ending Balance	$ 181