EARNINGS PER SHARE - Reconciliation of Basic Shares to Diluted Shares (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Reconciliation of Basic Shares to Diluted Shares
Basic (in shares)	510	506	509	506
Effect of dilutive securities (in shares)	0	0	0	0
Diluted (in shares)	510	506	509	506
Loss from continuing operations	$ (311)	$ (193)	$ (272)	$ (193)
Less: Comprehensive income attributable to noncontrolling interests	3	2	5	3
Income from discontinued operations, net of tax	0	54	0	99
Net loss attributable to Baxter stockholders	(314)	(141)	(277)	(97)
Loss from continuing operations	$ (314)	$ (195)	$ (277)	$ (196)