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Related party transactions (Tables) | 9 Months Ended
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Sep. 30, 2025
Related Party Transactions [Abstract] |
Schedule of related party transactions | Our related party revenues include the following:
|  | Three months ended September 30, |  | Nine months ended September 30, |  |
(In $ millions) |  | 2025 |  | 2024 |  | 2025 |  | 2024 |  |
Management fees revenues (a) |  | 61 |  |  | 59 |  |  | 181 |  |  | 176 |  |  |
Add-on services |  | 2 |  |  | 3 |  |  | 8 |  |  | 9 |  |  |
Reimbursable revenues (b) |  | 5 |  |  | 3 |  |  | 21 |  |  | 10 |  |  |
Leasing revenues (c) |  | 9 |  |  | 9 |  |  | 25 |  |  | 46 |  |  |
Other |  | — |  |  | — |  |  | — |  |  | 5 |  |  |
Total related party operating revenues |  | 77 |  |  | 74 |  |  | 235 |  |  | 246 |  |  |
(a) Seadrill provides management and administrative services an d operational and technical support services to Sonadrill. These services are charged on a dayrate basis. (b) Reimbursable revenues primarily relate to Sonadrill project work on the Libongos, Quenguela and West Gemini rigs. (c) During 2025, we earned leasing revenues on the charter of the West Gemini to Sonadrill. During 2024, we also earned leasing revenues from the West Castor, West Telesto, and West Tucana, which were leased to Gulfdrill, up to their disposal in June 2024.

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- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-1 + Details
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