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Related party - Schedule of Allocated Corporate Expenses (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Related Party Transaction [Line Items] |  |  |  |
Total cost of revenues | $ 2,254 | $ 2,264 | $ 4,113 | $ 4,158
Selling, general and administrative expenses | 299 | 228 | 538 | 441
Related Party |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Total cost of revenues | 8 | 5 | 16 | 15
Selling, general and administrative expenses | 25 | 26 | 44 | 44
Total | $ 33 | $ 31 | $ 60 | $ 59

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