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Equity accounted investment - continuity (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of associates [line items] |  |  |
Net investment beginning | $ 1,487 | $ 2,862 |
Net income/(loss) from equity accounted investments | 53 | 164 | $ 291
Acqusitions and increase in paid in capital | 995 | 188 |
Dividends and other distributions | (141) | (273) |
Other comprehensive income / (loss) | 21 | (10) |
Divestments, derecognition and decrease in paid in capital | (147) | (1,444) |
Net investment ending | 2,270 | 1,487 | $ 2,862
Included in equity accounted investments [member] |  |  |
Disclosure of associates [line items] |  |  |
Net investment beginning | 1,441 |  |
Net investment ending | 2,262 | 1,441 |
Other long-term receivable in equity accounted investments [member] |  |  |
Disclosure of associates [line items] |  |  |
Net investment beginning | 46 |  |
Net investment ending | 8 | $ 46 |
Other equity accounted investments [Member] |  |  |
Disclosure of associates [line items] |  |  |
Net investment ending | $ 600 |  |

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