XML 51 R44.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Investment in associated companies (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2018
Investments, Debt and Equity Securities [Abstract] |
Equity Method Investments | We have the following investments that are either recorded using the equity method or at cost less impairment for the periods presented in these Consolidated Financial Statements:
(In $ millions) |  | June 30, 2018 |  |  | December 31, 2017 |
Seabras Sapura Participacoes |  |  | 76 |  |  |  | 63 |
Seabras Sapura Holdco |  |  | 334 |  |  |  | 290 |
Seadrill Partners—Total direct ownership interests |  |  | 914 |  |  |  | 857 |
Seadrill Partners—Subordinated units |  |  | 120 |  |  |  | 97 |
Seadrill Partners—Seadrill member interest and IDRs (1) |  |  | 64 |  |  |  | 64 |
SeaMex Ltd |  |  | 107 |  |  |  | 102 |
Total investment in associated companies |  |  | 1,615 |  |  |  | 1,473 |
(1) | The Seadrill Partners—Seadrill member interest and Incentive Distribution Rights (“IDRs”) are recorded at cost less impairment on the basis that they do not represent common stock interests and their fair value is not readily determinable.

X
- Definition Schedule of Equity and Cost Investments [Table Text Block] + References No definition available. + Details
Name: | sdrl_ScheduleOfEquityAndCostInvestmentsTableTextBlock
Namespace Prefix: | sdrl_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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