FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Jan. 31, 2024	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 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		146		146
Pre-tax gains				130
Cross-currency swap contracts
Derivative [Line Items]
Recognized in Other comprehensive income/(loss)		(4)	$ 36	90	$ 2
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		4,400		4,400
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