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v3.21.2

Segment information - Results by Segment (Details) $ in Millions | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2021 USD ($) segment | Jun. 30, 2020 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Segment Reporting [Abstract] |  |  |  |
Number of reportable segments | segment | 3 |  |  |
Number of operating segments | segment | 3 |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total operating revenue | $ 452 | $ 598 |  |
Loss on impairment of long-lived assets | 152 | 1,230 |  |
Operating loss - Net loss |  |  |  |
Operating loss | (252) | (1,372) |  |
Unallocated items: |  |  |  |
Total financial items and other | (342) | (374) |  |
Income taxes | (11) | (2) |  |
Net loss | (605) | (1,748) |  |
Investments in associated companies | 248 |  | $ 248 |
Cash and restricted cash | 644 | 1,020 | 723 | $ 1,357
Other assets | 232 |  | 240 |
Total assets | 3,657 |  | 3,961 |
Drilling units - capital expenditures | 40 | 85 |  |
Harsh environment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Loss on impairment of long-lived assets | 152 | 160 |  |
Operating loss - Net loss |  |  |  |
Operating loss | (177) | (147) |  |
Unallocated items: |  |  |  |
Drilling units - capital expenditures | 17 | 11 |  |
Floaters |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Loss on impairment of long-lived assets | 0 | 1,070 |  |
Operating loss - Net loss |  |  |  |
Operating loss | (27) | (1,184) |  |
Unallocated items: |  |  |  |
Drilling units - capital expenditures | 12 | 58 |  |
Jack-up rigs |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Loss on impairment of long-lived assets | 0 | 0 |  |
Operating loss - Net loss |  |  |  |
Operating loss | (1) | 10 |  |
Unallocated items: |  |  |  |
Drilling units - capital expenditures | 10 | 7 |  |
Other |  |  |  |
Operating loss - Net loss |  |  |  |
Operating loss | (47) | (51) |  |
Unallocated items: |  |  |  |
Drilling units - capital expenditures | 1 | 9 |  |
Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total operating revenue | 452 | 598 |  |
Depreciation | 83 | 182 |  |
Unallocated items: |  |  |  |
Total drilling units | 1,927 |  | 2,120 |
Operating Segments | Harsh environment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total operating revenue | 232 | 276 |  |
Depreciation | 43 | 52 |  |
Unallocated items: |  |  |  |
Total drilling units | 858 |  | 1,032 |
Operating Segments | Floaters |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total operating revenue | 154 | 216 |  |
Depreciation | 19 | 105 |  |
Unallocated items: |  |  |  |
Total drilling units | 507 |  | 528 |
Operating Segments | Jack-up rigs |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total operating revenue | 60 | 98 |  |
Depreciation | 21 | 25 |  |
Unallocated items: |  |  |  |
Total drilling units | 562 |  | 560 |
Operating Segments | Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total operating revenue | 6 | $ 8 |  |
Segment Reconciling Items |  |  |  |
Unallocated items: |  |  |  |
Investments in associated companies | 248 |  | 248 |
Cash and restricted cash | 644 |  | 723 |
Other assets | $ 838 |  | $ 870 |

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