Condensed Consolidated Statements of Comprehensive Income (Loss) (unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Statement of Comprehensive Income [Abstract]
Income (loss) from continuing operations	$ (17)	$ 64
Other comprehensive income (loss) from continuing operations, net of tax:
Currency translation adjustments, net of tax expense (benefit) of $15 and $6 for the three months ended March 31, 2026 and 2025, respectively.	(52)	(68)
Pension and other postretirement benefits, net of tax expense (benefit) of $1 and $(4) for the three months ended March 31, 2026 and 2025, respectively.	3	12
Hedging activities, net of tax expense (benefit) of zero and $(1) for the three months ended March 31, 2026 and 2025, respectively.	1	(2)
Total other comprehensive income (loss) from continuing operations, net of tax	(48)	(58)
Comprehensive income (loss) from continuing operations	(65)	6
Income (loss) from discontinued operations, net of tax	2	62
Currency translation adjustments, net of tax expense (benefit) of zero for the three months ended March 31, 2026 and 2025, respectively.	0	137
Pension and other postretirement benefits, net of tax expense (benefit) of zero and $(3) for the three months ended March 31, 2026 and 2025, respectively.	0	(11)
Total other comprehensive income (loss) from discontinued operations	0	126
Comprehensive income (loss) from discontinued operations	2	188
Comprehensive income (loss)	(63)	194
Less: Comprehensive income attributable to noncontrolling interests	0	0
Less: Other comprehensive loss attributable to noncontrolling interests	0	0
Comprehensive income (loss) attributable to Baxter stockholders	$ (63)	$ 194