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Accumulated other comprehensive (loss)/income (Tables) | 6 Months Ended
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Jun. 30, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Schedule of accumulated other comprehensive income | Accumulated other comprehensive (loss)/income for the six months ended June 30, 2021 and June 30, 2020 were as follows:
(In $ millions) |  |  |  |  |  | Actuarial loss relating to pension |  | Share in unrealized loss from associated companies |  |  |  | Change in debt component on Archer bond |  | Total
As at January 1, 2021 |  |  |  |  |  | (2) |  |  | (28) |  |  |  |  | 4 |  |  | (26) |
Other comprehensive income |  |  |  |  |  | — |  |  | 4 |  |  |  |  | 1 |  |  | 5 |
As at June 30, 2021 |  |  |  |  |  | (2) |  |  | (24) |  |  |  |  | 5 |  |  | (21) |
(In $ millions) |  |  |  |  |  | Actuarial loss relating to pension |  | Share in unrealized loss from associated companies |  |  |  | Change in debt component on Archer bond |  | Total
As at January 1, 2020 |  |  |  |  |  | — |  |  | (13) |  |  |  |  | — |  |  | (13) |
Other comprehensive (loss)/income |  |  |  |  |  | (7) |  |  | (17) |  |  |  |  | 2 |  | (22) |
As at June 30, 2020 |  |  |  |  |  | (7) |  |  | (30) |  |  |  |  | 2 |  |  | (35) |

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=124509347&loc=SL7669686-108580 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
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