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Costs and expenses by nature - Other (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Costs and expenses by nature |  |  |
Profit sharing program | $ 115 | $ 89 | $ 187
COVID-19 expenses | 109 |  |
Disposals of materials and inventories | 25 | 47 | 32
Others | 118 | (14) | 36
Total | 752 | 505 | 445
Termination or amendment of contracts of all converted vessels | 128 |  |
Provision for litigations |  |  |
Costs and expenses by nature |  |  |
Provision | 73 | 291 | 185
Asset Retirement Obligation |  |  |
Costs and expenses by nature |  |  |
Provision | $ 312 | $ 92 | $ 5

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- Definition The amount of post-employment benefit expense relating to defined contribution plans included in other operational expenses. Defined contribution plans are post-employment benefit plans under which an entity pays fixed contributions into a separate entity (a fund) and will have no legal or constructive obligation to pay further contributions if the fund does not hold sufficient assets to pay all employee benefits relating to employee service in the current and prior periods. + References No definition available. + Details
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