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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jan. 31, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024
Derivative [Line Items] |  |  |  |  |  |
Debt securities, available-for-sale, term |  | 5 years |  | 5 years |  | 5 years
Cumulative upward adjustments |  | $ 229 |  | $ 229 |  |
Cumulative impairment amount |  | 140 |  | 140 |  |
Pre-tax gains |  |  |  | 156 |  |
Cross-currency swap contracts |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Recognized in Other comprehensive income/(loss) |  | 70 | $ (18) | 94 | $ (34) |
Forward interest rate contracts | Cash Flow Hedging |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative, notional amount | $ 5,000 |  |  |  |  |
Recognized in Other comprehensive income/(loss) | $ 131 |  |  |  |  |
Designated as cash flow hedges | Cross-currency swap contracts | Cash Flow Hedging |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative, notional amount |  | 584 |  | 584 |  |
Designated as cash flow hedges | Cross-currency swap contracts | Net Investment Hedging |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative, notional amount |  | 707 |  | 707 |  |
Designated as cash flow hedges | Euro Member Countries, Euro | Foreign currency exchange contracts |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative, notional amount |  | 4,500 |  | 4,500 |  |
Designated as cash flow hedges | Euro Member Countries, Euro | Cross-currency swap contracts | Net Investment Hedging |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative, notional amount |  | 345 |  | 345 |  |
Designated as cash flow hedges | Japan, Yen | Foreign currency exchange contracts |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative, notional amount |  | 1,200 |  | 1,200 |  |
Designated as cash flow hedges | Japan, Yen | Cross-currency swap contracts | Net Investment Hedging |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative, notional amount |  | $ 362 |  | $ 362 |  |

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