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Post-employment benefits for employees (Details 3) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Pension plans |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | $ 17,533 | $ 23,583 | $ 25,602
Plan assets, at fair value | 18,945 | 22,420 | 22,317
Funded status | 1,412 | (1,163) |
Pension plans | Unfunded |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 919 | 1,127 |
Pension plans | Active |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 6,161 | 8,510 |
Pension plans | Deferred pensioners |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 1,691 | 2,938 |
Pension plans | Pensioners |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 9,681 | 12,135 |
Pension plans | Switzerland |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 11,824 | 15,268 |
Plan assets, at fair value | 14,701 | 16,436 |
Funded status | 2,877 | 1,168 |
Pension plans | Switzerland | Active |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 4,799 | 6,478 |
Pension plans | Switzerland | Pensioners |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 7,025 | 8,790 |
Pension plans | US |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 2,746 | 3,645 |
Plan assets, at fair value | 1,978 | 2,551 |
Funded status | (768) | (1,094) |
Pension plans | US | Unfunded |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 556 | 688 |
Pension plans | US | Active |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 431 | 620 |
Pension plans | US | Deferred pensioners |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 830 | 1,208 |
Pension plans | US | Pensioners |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 1,485 | 1,817 |
Pension plans | Rest of the world |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 2,963 | 4,670 |
Plan assets, at fair value | 2,266 | 3,433 |
Funded status | (697) | (1,237) |
Pension plans | Rest of the world | Unfunded |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 363 | 439 |
Pension plans | Rest of the world | Active |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 931 | 1,412 |
Pension plans | Rest of the world | Deferred pensioners |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 861 | 1,730 |
Pension plans | Rest of the world | Pensioners |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 1,171 | 1,528 |
Other post-employment benefit plans |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 422 | 560 | 632
Plan assets, at fair value | 60 | 73 | $ 89
Funded status | (362) | (487) |
Other post-employment benefit plans | Unfunded |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 362 | 487 |
Other post-employment benefit plans | Active |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 48 | 83 |
Other post-employment benefit plans | Deferred pensioners |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 8 | 13 |
Other post-employment benefit plans | Pensioners |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 366 | 464 |
Other post-employment benefit plans | US |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 346 | 473 |
Plan assets, at fair value | 60 | 73 |
Funded status | (286) | (400) |
Other post-employment benefit plans | US | Unfunded |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 286 | 400 |
Other post-employment benefit plans | US | Active |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 30 | 60 |
Other post-employment benefit plans | US | Deferred pensioners |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 8 | 13 |
Other post-employment benefit plans | US | Pensioners |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 308 | 400 |
Other post-employment benefit plans | Rest of the world |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 76 | 87 |
Plan assets, at fair value | 0 | 0 |
Funded status | (76) | (87) |
Other post-employment benefit plans | Rest of the world | Unfunded |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 76 | 87 |
Other post-employment benefit plans | Rest of the world | Active |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 18 | 23 |
Other post-employment benefit plans | Rest of the world | Deferred pensioners |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | 0 | 0 |
Other post-employment benefit plans | Rest of the world | Pensioners |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Defined benefit obligation, at present value | $ 58 | $ 64 |

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 2022-03-24 -Paragraph 57 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_57_a&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition 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. + Details
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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 2022-03-24 -Paragraph 57 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_57_a&doctype=Standard -URIDate 2022-03-24 + Details
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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 -Name IAS -Number 19 -IssueDate 2022-03-24 -Paragraph 57 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_57_a&doctype=Standard -URIDate 2022-03-24 + Details
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- Details
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Namespace Prefix: |
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Balance Type: |
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- Details
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- Details
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- Details
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- Details
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- Details
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