Goodwill and Intangibles - Summary of Changes In Carrying Amounts of Goodwill By Reportable Segments (Detail) $ in Millions	6 Months Ended
Jun. 30, 2022 USD ($)
Goodwill [LineItems]
Beginning Balance	$ 1,106
Acquisitions	1,229
Measurement period adjustments and other	(109)
Ending Balance	2,226
Safety Services [Member]
Goodwill [LineItems]
Beginning Balance	925
Acquisitions	1,229
Measurement period adjustments and other	(109)
Ending Balance	2,045
Specialty Services [Member]
Goodwill [LineItems]
Beginning Balance	181
Ending Balance	$ 181

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

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Amount of increase (decrease) from foreign currency translation adjustments and purchase accounting adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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