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v3.21.1

Employee benefits - Costs recognized in the statement of comprehensive income (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Costs recognized in the statement of comprehensive income |  |  |
Others comprehensive income | $ (5,492) | $ (848) | $ (3,399)
Overfunded pension plans |  |  |
Costs recognized in the statement of comprehensive income |  |  |
Balance at beginning of the year | (173) | (166) | (163)
Effect of changes actuarial assumptions | (118) | (718) | (679)
Return on plan assets (excluding interest income) | (114) | 757 | 479
Change of asset ceiling | 278 | (60) | 172
Others |  |  | (1)
Total | 46 | (21) | (29)
Deferred income tax | (15) | 7 | 10
Others comprehensive income | 31 | (14) | (19)
Translation adjustments | 41 | 7 | 23
Transfers/ disposal |  |  | (7)
Accumulated other comprehensive income | (101) | (173) | (166)
Underfunded pension plans |  |  |
Costs recognized in the statement of comprehensive income |  |  |
Balance at beginning of the year | (459) | (468) | (496)
Effect of changes actuarial assumptions | (271) | (373) | 172
Return on plan assets (excluding interest income) | 305 | 385 | (144)
Others | 9 |  |
Total | 43 | 12 | 28
Deferred income tax | (12) | (5) | (7)
Others comprehensive income | 31 | 7 | 21
Translation adjustments | 28 | 2 | 11
Transfers/ disposal |  |  | (4)
Accumulated other comprehensive income | (400) | (459) | (468)
Other benefits |  |  |
Costs recognized in the statement of comprehensive income |  |  |
Balance at beginning of the year | (238) | (128) | (189)
Effect of changes actuarial assumptions | (243) | (176) | 32
Others | 11 |  | (1)
Total | (232) | (176) | 31
Deferred income tax | 82 | 63 | (8)
Others comprehensive income | (150) | (113) | 23
Translation adjustments | 25 | 3 | 10
Transfers/ disposal |  |  | 28
Accumulated other comprehensive income | $ (363) | $ (238) | $ (128)

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- Definition The amount of income tax relating to amounts recognised in other comprehensive income in relation to remeasurements of defined benefit plans. [Refer: Other comprehensive income; Reserve of remeasurements of defined benefit plans; Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 81 -Subparagraph ab -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_ab&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 90 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_90&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of income and expense (including reclassification adjustments) that is not recognised in profit or loss as required or permitted by IFRSs. [Refer: IFRSs [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 106 -Subparagraph d -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_106_d_ii&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2020-01-01 -Paragraph B12 -Subparagraph b -Clause viii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_B12_b_viii&doctype=Appendix&subtype=B -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 81A -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_81A_b&doctype=Standard -URIDate 2020-01-01 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 91 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_91_a&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of other comprehensive income, before tax, related to gains (losses) on remeasurements of defined benefit plans, which comprise actuarial gains and losses; the return on plan assets, excluding amounts included in net interest on the net defined benefit liability (asset); and any change in the effect of the asset ceiling, excluding amounts included in net interest on the net defined benefit liability (asset). [Refer: Other comprehensive income, before tax; Defined benefit plans [member]; Plan assets [member]; Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 91 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_91_b&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_7&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of accumulated items of income and expense related to defined benefit plans. + References No definition available. + Details
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- Definition The a mount of defined benefit plan gain or loss in accumulated other comprehensive income transferred between different plans or disposed. + References No definition available. + Details
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- Definition The amount of other comprehensive income, net of tax, related to change of asset ceiling / costly liabilities (excluding interest income) of defined benefit plans. + References No definition available. + Details
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- Definition The amount of other comprehensive income, net of tax, related to actuarial gains and losses of defined benefit plans. + References No definition available. + Details
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- Definition The amount of other comprehensive income, net of tax, other loss (gains) of defined benefit plans. + References No definition available. + Details
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- Definition The amount of other comprehensive income, net of tax, related to return on plan assets (excluding interest income) of defined benefit plans. + References No definition available. + Details
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- Definition The amount of translation adjustments related to defined benefit plan. + References No definition available. + Details
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