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Assets Held For Sale and Other Current Assets - Summary of Assets and liabilities Held for Sale (Parenthetical) (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Asset held for sale and discontinued operations [line items]
Disposal group including discontinued operations assets held for sale	$ 187	$ 839
Disposal group including discontinued operations liabilities held for sale	6	$ 37
France [member] | Committed sale of certain assets [member]
Asset held for sale and discontinued operations [line items]
Disposal group including discontinued operations assets held for sale	26
Disposal group including discontinued operations liabilities held for sale	$ 6

X

- Definition

Asset held for sale and discontinued operations.

+ References

No definition available.

+ Details

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- Definition

The amount of current assets other than non-current assets or disposal groups classified as held for sale or as held for distribution to owners. [Refer: Current assets; Disposal groups classified as held for sale [member]; Non-current assets or disposal groups classified as held for sale; Non-current assets or disposal groups classified as held for distribution to owners]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 66
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-URIDate 2020-01-01

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X

- Definition

The amount of liabilities included in disposal groups classified as held for sale. [Refer: Liabilities; Disposal groups classified as held for sale [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 5
-IssueDate 2020-01-01
-Paragraph 38
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-URIDate 2020-01-01

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-IssueDate 2020-01-01
-Paragraph 54
-Subparagraph p
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_p&doctype=Standard
-URIDate 2020-01-01

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