EARNINGS PER SHARE - Schedule of Net Income (Loss) Attributable to Stockholder (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share [Abstract]
Income from continuing operations	$ 39	$ 0
Less: Comprehensive income attributable to noncontrolling interests	2	1
Income (loss) from continuing operations attributable to Baxter stockholders	37	(1)
Income from discontinued operations, net of tax	0	45
Net income attributable to Baxter stockholders	$ 37	$ 44