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Pensions and Post-Employment Benefits - Aggregate Projected Benefit Obligation for Pension Plans and Other Post-employment Benefits and the Plan Assets by Country (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disclosure of fair value of plan assets [line items]
PBO	$ 1,704	$ 2,010	$ 1,903
Assets	1,145	1,275	$ 1,208
Deficit	559	735
Mexico [member]
Disclosure of fair value of plan assets [line items]
PBO	200	253
Assets	30	44
Deficit	170	209
United States [member]
Disclosure of fair value of plan assets [line items]
PBO	142	184
Assets	143	188
Deficit	(1)	(4)
United Kingdom [member]
Disclosure of fair value of plan assets [line items]
PBO	960	1,129
Assets	752	821
Deficit	208	308
Germany [member]
Disclosure of fair value of plan assets [line items]
PBO	121	141
Assets	5	6
Deficit	116	135
Other countries [member]
Disclosure of fair value of plan assets [line items]
PBO	281	303
Assets	215	216
Deficit	$ 66	$ 87

X

- Definition

The present value, without deducting any plan assets, of expected future payments required to settle the obligation resulting from employee service in the current and prior periods. [Refer: Plan assets, at fair value]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2024-01-01
-Paragraph 57
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_57_a&doctype=Standard
-URIDate 2024-03-27

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

+ References

No definition available.

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- Definition

The fair value of defined benefit plan assets. Plan assets comprise assets held by a long-term employee benefit fund and qualifying insurance policies. [Refer: At fair value [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2024-01-01
-Paragraph 57
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_57_a&doctype=Standard
-URIDate 2024-03-27

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- Definition

The fair value of any plan assets, less the present value of the defined benefit obligation. [Refer: Plan assets [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Number 19
-IssueDate 2024-01-01
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-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_57_a&doctype=Standard
-URIDate 2024-03-27

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