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v3.20.4

Equipment | 12 Months Ended
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Dec. 31, 2020
Property, Plant and Equipment [Abstract] |
Equipment | Equipment Equipment consists of office equipment, software, furniture and fittings. Changes in equipment balances for the periods presented in this report were as follows:
(In $ millions) |  | Cost |  | Accumulated depreciation |  | Net book value
January 1, 2019 |  | 34 |  |  | (5) |  |  | 29 |
Additions |  | 4 |  |  | — |  |  | 4 |
Depreciation |  | — |  |  | (10) |  |  | (10) |
December 31, 2019 |  | 38 |  |  | (15) |  |  | 23 |
Additions |  | 1 |  |  | — |  |  | 1 |
Depreciation |  | — |  |  | (5) |  |  | (5) |
December 31, 2020 |  | 39 |  |  | (20) |  |  | 19 |

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- Definition The entire disclosure for long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. + References No definition available. + Details
Name: | sdrl_EquipmentTextBlock
Namespace Prefix: | sdrl_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration