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 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 loss	(94)	(97)				(97)		3
Other comprehensive income (loss)	19	19					19
Stock issued under employee benefit plans and other (in shares)				(2,000,000)
Stock issued under employee benefit plans and other	112	112		$ 93	19
Dividends declared on common stock	(298)	(298)				(298)
Change in noncontrolling interests	(3)							(3)
Balance, end of period (in shares) at Jun. 30, 2023			683,000,000
Balance, end of period (in usd) at Jun. 30, 2023	5,631	5,569	$ 683	$ (11,296)	6,341	13,655	(3,814)	62
Balance, treasury, ending period (in shares) at Jun. 30, 2023				177,000,000
Balance, beginning of period (in shares) at Mar. 31, 2023			683,000,000
Balance, beginning of period (in usd) at Mar. 31, 2023	5,941	5,879	$ 683	$ (11,324)	6,312	13,947	(3,739)	62
Balance, treasury, beginning period (in shares) at Mar. 31, 2023				178,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(139)	(141)				(141)		2
Other comprehensive income (loss)	(75)	(75)					(75)
Stock issued under employee benefit plans and other (in shares)				(1,000,000)
Stock issued under employee benefit plans and other	57	57		$ 28	29
Dividends declared on common stock	(151)	(151)				(151)
Change in noncontrolling interests	(2)							(2)
Balance, end of period (in shares) at Jun. 30, 2023			683,000,000
Balance, end of period (in usd) at Jun. 30, 2023	5,631	5,569	$ 683	$ (11,296)	6,341	13,655	(3,814)	62
Balance, treasury, ending period (in shares) at Jun. 30, 2023				177,000,000
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 loss	$ (272)	(277)				(277)		5
Other comprehensive income (loss)	(278)	(274)					(274)	(4)
Stock issued under employee benefit plans and other (in shares)				(3,000,000)
Stock issued under employee benefit plans and other	90	90		$ 126	(36)
Dividends declared on common stock	(298)	(298)				(298)
Change in noncontrolling interests	(2)							(2)
Balance, end of period (in shares) at Jun. 30, 2024			683,000,000
Balance, end of period (in usd) at Jun. 30, 2024	$ 7,708	7,643	$ 683	$ (11,104)	6,353	15,539	(3,828)	65
Balance, treasury, ending period (in shares) at Jun. 30, 2024	173,429,843			173,000,000
Balance, beginning of period (in shares) at Mar. 31, 2024			683,000,000
Balance, beginning of period (in usd) at Mar. 31, 2024	$ 8,235	8,173	$ 683	$ (11,130)	6,339	16,003	(3,722)	62
Balance, treasury, beginning period (in shares) at Mar. 31, 2024				174,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(311)	(314)				(314)		3
Other comprehensive income (loss)	(106)	(106)					(106)
Stock issued under employee benefit plans and other (in shares)				(1,000,000)
Stock issued under employee benefit plans and other	40	40		$ 26	14
Dividends declared on common stock	(150)	(150)				(150)
Balance, end of period (in shares) at Jun. 30, 2024			683,000,000
Balance, end of period (in usd) at Jun. 30, 2024	$ 7,708	$ 7,643	$ 683	$ (11,104)	$ 6,353	$ 15,539	$ (3,828)	$ 65
Balance, treasury, ending period (in shares) at Jun. 30, 2024	173,429,843			173,000,000