EARNINGS PER SHARE - Schedule of Net Income (Loss) Attributable to Stockholder (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Earnings Per Share [Abstract]
Loss from continuing operations	$ (311)	$ (193)	$ (272)	$ (193)
Less: Comprehensive income attributable to noncontrolling interests	3	2	5	3
Loss from continuing operations attributable to Baxter stockholders	(314)	(195)	(277)	(196)
Income from discontinued operations, net of tax	0	54	0	99
Net loss attributable to Baxter stockholders	$ (314)	$ (141)	$ (277)	$ (97)