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Goodwill and Intangible Assets, Net - Summary of Changes in Consolidated goodwill (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of reconciliation of changes in goodwill [abstract]
Balance at beginning of period	$ 9,562	$ 9,912	$ 9,948
Business combinations (note 5.1)	2		16
Reclassification to assets held for sale (notes 5.2, 5.3 and 13)	(9)	(371)	(22)
Impairment losses of goodwill	(1,020)
Foreign currency translation effects	(29)	21	(30)
Balance at end of period	$ 8,506	$ 9,562	$ 9,912

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- Definition

Reclassification to assets held for sale and other current assets.

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No definition available.

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- Definition

The amount of additional goodwill recognised, except goodwill included in a disposal group that, on acquisition, meets the criteria to be classified as held for sale in accordance with IFRS 5. [Refer: Goodwill; Disposal groups classified as held for sale [member]]

+ References

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- Definition

The amount of assets representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognised. [Refer: Business combinations [member]]

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The amount of impairment loss recognised in profit or loss for goodwill. [Refer: Impairment loss recognised in profit or loss; Goodwill]

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The increase (decrease) in goodwill resulting from net exchange differences arising on the translation of the financial statements from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Goodwill]

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