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Financial instruments disclosures - Carrying Amounts And Fair Values (Detail) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Carrying Value
Current borrowings and bank overdrafts	$ (313)	$ (720)
Non-current borrowings	(12,291)	(12,086)
Total	(12,604)	(12,806)
Fair Value
Current borrowings and bank overdrafts	(313)	(720)
Non-current borrowings	(14,413)	(13,958)
Total	$ (14,726)	$ (14,678)

X

- Definition

The amount of outstanding funds that the entity is obligated to repay.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 55
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-URIDate 2019-03-27

+ Details

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X

- Definition

The current portion of non-current borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_55&doctype=Standard
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X

- Definition

The non-current portion of non-current borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_55&doctype=Standard
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- Definition

Borrowings at fair value.

+ References

No definition available.

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Balance Type:	credit
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X

- Definition

Carrying Value [Abstract]

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No definition available.

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- Definition

Fair Value [Abstract]

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No definition available.

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- Definition

Longterm borrowings at fair value.

+ References

No definition available.

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- Definition

Short term borrowings at fair value.

+ References

No definition available.

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