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v3.23.4

Acquisitions - Additional Information (Detail) - USD ($) shares in Millions, $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2023 | Sep. 30, 2023 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Business Acquisition [Line Items] |  |  |  |  |
Business combination shares issued |  |  | 5.0 |  |
Business combination shares issued, value |  |  | $ 1,254.0 |  |
Common stock value | $ 11,624.0 |  | 11,624.0 | $ 11,837.0 |
Ownership interest in net assets, value | $ 1,170.0 |  | 1,170.0 | 304.0 |
Revenue |  |  | $ 33,135.0 | 28,091.0 | $ 22,929.0
Aker and Subsea7 |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Percentage of ownership interest, non-controlling | 30.00% |  | 30.00% |  |
Aker | Subsea Business |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Revenue |  | $ 1,400.0 |  | $ 1,500.0 |
Subsea7 |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Percentage of ownership interest purchased |  |  | 10.00% |  |
Payment to purchase ownership interest |  |  | $ 306.5 |  |
OneSubsea |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Net assets of joint venture | $ 2,800.0 |  | 2,800.0 |  |
Ownership interest in net assets, value | $ 800.0 |  | 800.0 |  |
Increase in common stock value |  |  | $ 100.0 |  |
OneSubsea | Aker |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business combination shares issued |  |  | 5.1 |  |
Business combination shares issued, value |  |  | $ 306.5 |  |
Percentage of ownership interest, non-controlling | 20.00% |  | 20.00% |  |
Promissory note issued |  |  | $ 87.5 |  |
Fair value of assets acquired and liabilities assumed | $ 1,300.0 |  | $ 1,300.0 |  |
Revenue | $ 500.0 |  |  |  |
OneSubsea | Subsea7 |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Percentage of ownership interest, non-controlling | 10.00% |  | 10.00% |  |
OneSubsea | SLB |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Percentage of ownership interest | 70.00% |  | 70.00% |  |

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