XML 57 R50.htm IDEA: XBRL DOCUMENT
v3.21.2

Investment in associated companies (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2021
Equity Method Investments and Joint Ventures [Abstract] |
Schedule of investment in associated companies | As at June 30, 2021 and December 31, 2020, the carrying values of our investments in associated companies were as follows.
(In $ millions) |  | As at June 30, 2021 |  | As at December 31, 2020
Seabras Sapura |  | 108 |  |  | 103 |
Shareholder loans provided to Seabras Sapura |  | 115 |  |  | 121 |
Sonadrill |  | 23 |  |  | 22 |
Gulfdrill |  | 2 |  |  | 2 |
Total investment in associated companies |  | 248 |  |  | 248 |

X
- Definition Tabular disclosure of the share of recorded equity in the statutory accounts of the entity's equity method investees. + References No definition available. + Details
Name: | sdrl_RecordedEquityInStatutoryAccountsOfEquityMethodInvesteesTableTextBlock
Namespace Prefix: | sdrl_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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