FAIR VALUE MEASUREMENTS - Cross-currency Swaps, Effect of Hedging Instruments on Financial Instruments (Details) - Net Investment Hedging - Cross-currency swaps - Designated as Hedging Instrument - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in Other comprehensive income (loss)	$ 2	$ (92)	$ 22	$ (128)
Location, Statement of Income, Balance [Axis]: us-gaap:InterestExpenseDebt
Derivative Instruments, Gain (Loss) [Line Items]
Gain excluded from assessment of hedge effectiveness	$ 1	$ 3	$ 4	$ 6

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

- Definition

Amount, before tax and adjustments, of gain (loss) from increase (decrease) in value of excluded component of derivative designated and qualifying as hedge. Adjustments include, but are not limited to, reclassifications for sale and settlement, and amounts recognized under systematic and rational method.

+ References + Details

Bausch Health Companies Inc. 10-Q