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Business Combinations - Summary of Fair Value of Identifiable Intangible Assets (Detail) - APi Acquisition [Member] $ in Millions	Oct. 01, 2019 USD ($)
Indefinite Lived Intangible Assets By Major Class [Line Items]
Total intangibles	$ 1,110
Contractual Backlog [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Total intangibles	99
Customer Relationships [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Total intangibles	752
Tradenames and Trademarks [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Total intangibles	$ 259

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount of increase in assets, excluding financial assets and goodwill, lacking physical substance with an indefinite life, from an acquisition.

+ References

No definition available.

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