BUSINESS OPTIMIZATION CHARGES - Components of Restructuring Charges (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 37	$ 15	$ 95	$ 36
COGS
Restructuring Cost and Reserve [Line Items]
Restructuring charges	25	2	42	5
SG&A
Restructuring Cost and Reserve [Line Items]
Restructuring charges	10	13	50	31
R&D
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2		3
Employee termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	18	12	49	29
Employee termination costs \| COGS
Restructuring Cost and Reserve [Line Items]
Restructuring charges	8	2	19	4
Employee termination costs \| SG&A
Restructuring Cost and Reserve [Line Items]
Restructuring charges	8	10	27	25
Employee termination costs \| R&D
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2		3
Contract termination and other costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	10	3	14	7
Contract termination and other costs \| COGS
Restructuring Cost and Reserve [Line Items]
Restructuring charges	8	0	10	1
Contract termination and other costs \| SG&A
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2	$ 3	4	$ 6
Contract termination and other costs \| R&D
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0		0
Asset write offs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	9		32
Asset write offs \| COGS
Restructuring Cost and Reserve [Line Items]
Restructuring charges	9		13
Asset write offs \| SG&A
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0		19
Asset write offs \| R&D
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 0		$ 0

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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- Definition

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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BAXTER INTERNATIONAL INC 10-Q