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v3.10.0.1

Segment Information - Segment Results (Detail) - USD ($) $ in Millions | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017 | Dec. 31, 2016
Segment Reporting Information [Line Items] |  |  |  |
Drilling units and new buildings | $ 12,780 |  | $ 13,464 |
Operating Revenue | 712 | $ 1,146 |  |
Depreciation and amortization | 391 | 406 |  |
Operating loss | (613) | (17) |  |
Drilling unit and new buildings capital expenditure | 117 | 66 |  |
Unallocated items: |  |  |  |
Assets held for sale |  |  | 126 |
Total financial items and other | 14 | (96) |  |
Investments in associated companies | 1,615 |  | 1,473 |
Income taxes | (36) | 12 |  |
Marketable securities | 121 |  | 124 |
Net loss | (635) | (101) |  |
Cash and restricted cash | 1,218 | 1,441 | 1,359 | $ 1,443
Other assets | 1,311 |  | 1,436 |
Total assets | 17,045 |  | 17,982 |
Floaters [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Drilling units and new buildings | 9,411 |  | 9,956 |
Operating Revenue | 482 | 744 |  |
Depreciation and amortization | 298 | 301 |  |
Operating loss | (446) | 95 |  |
Drilling unit and new buildings capital expenditure | 93 | 54 |  |
Jack Ups [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Drilling units and new buildings | 3,369 |  | $ 3,508 |
Operating Revenue | 193 | 360 |  |
Depreciation and amortization | 93 | 105 |  |
Operating loss | (167) | (115) |  |
Drilling unit and new buildings capital expenditure | 24 | 12 |  |
Other Drilling Units [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating Revenue | $ 37 | 42 |  |
Operating loss |  | $ 3 |  |

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