Condensed Consolidated Statements of Changes in Equity (unaudited) - USD ($) $ in Millions	Total	Total Baxter stockholders' equity	Common stock	Common stock in treasury	Additional contributed capital	Retained earnings	Accumulated other comprehensive income (loss)	Noncontrolling interests
Balance, beginning of period (in shares) at Dec. 31, 2022			683,000,000
Balance, beginning of period (in usd) at Dec. 31, 2022	$ 5,895	$ 5,833	$ 683	$ (11,389)	$ 6,322	$ 14,050	$ (3,833)	$ 62
Balance, treasury, beginning period (in shares) at Dec. 31, 2022				179,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	45	44				44		1
Other comprehensive income (loss)	94	94					94
Stock issued under employee benefit plans and other (in shares)				(1,000,000)
Stock issued under employee benefit plans and other	55	55		$ 65	(10)
Dividends declared on common stock	(147)	(147)				(147)
Change in noncontrolling interests	(1)							(1)
Balance, end of period (in shares) at Mar. 31, 2023			683,000,000
Balance, end of period (in usd) at Mar. 31, 2023	5,941	5,879	$ 683	$ (11,324)	6,312	13,947	(3,739)	62
Balance, treasury, ending period (in shares) at Mar. 31, 2023				178,000,000
Balance, beginning of period (in shares) at Dec. 31, 2023			683,000,000
Balance, beginning of period (in usd) at Dec. 31, 2023	$ 8,468	8,402	$ 683	$ (11,230)	6,389	16,114	(3,554)	66
Balance, treasury, beginning period (in shares) at Dec. 31, 2023	175,861,893			176,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 39	37				37		2
Other comprehensive income (loss)	(172)	(168)					(168)	(4)
Stock issued under employee benefit plans and other (in shares)				(2,000,000)
Stock issued under employee benefit plans and other	50	50		$ 100	(50)
Dividends declared on common stock	(148)	(148)				(148)
Change in noncontrolling interests	(2)							(2)
Balance, end of period (in shares) at Mar. 31, 2024			683,000,000
Balance, end of period (in usd) at Mar. 31, 2024	$ 8,235	$ 8,173	$ 683	$ (11,130)	$ 6,339	$ 16,003	$ (3,722)	$ 62
Balance, treasury, ending period (in shares) at Mar. 31, 2024	173,930,493			174,000,000