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Segment Information - Net Revenues (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Total net revenues | $ 13,269 | $ 17,286 | $ 16,128
Switzerland |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Total net revenues | 3,944 | 5,755 | 4,569
France |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Total net revenues | 147 | 158 | 153
Italy |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Total net revenues | 34 | 54 | 47
USA |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Total net revenues | 1,668 | 2,279 | 1,981
Singapore |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Total net revenues | 6,808 | 8,138 | 8,604
Japan |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Total net revenues | 657 | 890 | 758
Other countries |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Total net revenues | $ 11 | $ 12 | $ 16

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