OPERATING DATA - Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Disclosure of detailed information about financial instruments [line items] | ||
| VAT receivables | $ 844 | $ 836 |
| Prepaid expenses and non-trade receivables | 954 | 610 |
| Financial amounts receivable | 282 | 389 |
| Income tax receivable | 163 | 148 |
| Receivables from public authorities | 179 | 207 |
| Receivables from sale of intangible, tangible and financial assets | 44 | 91 |
| Derivative financial instruments (notes 6.1 and 6.3) | 193 | 305 |
| CO2 emission rights | 100 | 180 |
| Other | 268 | 256 |
| Prepaid expenses and other current assets | 3,027 | 3,022 |
| Sovereign-fund guaranteed receivables | ||
| Disclosure of detailed information about financial instruments [line items] | ||
| Financial amounts receivable | $ 0 | $ 98 |