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Related party transactions | 9 Months Ended
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Sep. 30, 2025
Related Party Transactions [Abstract] |
Related party transactions | Related party transactions As of September 30, 2025, our major related party is the Sonadrill joint venture, over which we hold significant influence. Related party revenues 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. R elated party balance s Sonadrill prepaid management fees a s of September 30, 2025 and December 31, 2024 of $5 million and $7 million, respectively, to Seadrill. These balances were recorded in "Other current liabilities" within our unaudited Condensed Consolidated Balance Sheets.

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- Definition The entire disclosure for related party transactions. Examples of related party transactions include 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/2003/role/disclosureRef -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/2003/role/disclosureRef -Topic 946 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480990/946-20-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480990/946-20-50-5 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480990/946-20-50-6 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477968/946-235-50-2 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477968/946-235-50-2 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(g)(3)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(c)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(e)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/850/tableOfContent Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-6 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-1 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-1 + Details
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