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v3.21.2

Related party transactions - Related Party Revenue, Operating Expenses, and Financial Items (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Related Party Transaction [Line Items] |  |  |
Total related party operating revenues | $ 84 | $ 177 |
Receivables from related parties | 460 |  | $ 477
Total related party operating expenses | 23 | 0 |
Total related party financial items | 10 | 12 |
Northern Ocean |  |  |
Related Party Transaction [Line Items] |  |  |
Receivables from related parties |  |  | 142
Receivables from related parties, billed and unbilled | 152 |  | 137
Receivables from related parties, costs incurred not yet billable | 5 |  | $ 5
Northern Ocean | Variable Interest Entity |  |  |
Related Party Transaction [Line Items] |  |  |
Receivables from related parties | 157 |  |
West Bollsta |  |  |
Related Party Transaction [Line Items] |  |  |
Total related party operating expenses | 21 | 0 |
Management fee revenues |  |  |
Related Party Transaction [Line Items] |  |  |
Total related party operating revenues | 55 | 76 |
Reimbursable revenues |  |  |
Related Party Transaction [Line Items] |  |  |
Total related party operating revenues | 29 | 100 |
Related party inventory sales |  |  |
Related Party Transaction [Line Items] |  |  |
Total related party operating revenues | 0 | 1 |
Other, operating expenses |  |  |
Related Party Transaction [Line Items] |  |  |
Total related party operating expenses | $ 2 | $ 0 |

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