CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Statement of Comprehensive Income [Abstract]
Income (loss) from continuing operations	$ (900)	$ (326)	$ 181
Other comprehensive income (loss) from continuing operations, net of tax:
Currency translation adjustments, net of tax expense (benefit) of ($24) in 2025, $1 in 2024 and $(26) in 2023	160	(648)	301
Pension and other postretirement benefit plans, net of tax expense of $(17) in 2025, $(6) in 2024 and $(25) in 2023	(28)	(19)	(92)
Hedging activities, net of tax expense (benefit) of zero in 2025, $3 in 2024 and zero in 2023	(2)	12	(1)
Total other comprehensive income (loss) from continuing operations, net of tax	130	(655)	208
Comprehensive income (loss) from continuing operations	(770)	(981)	389
Other comprehensive income (loss) from discontinued operations
Income (loss) from discontinued operations, net of tax	(57)	(312)	2,482
Currency translation adjustments, net of tax expense (benefit) of zero in 2025, $(7) in 2024 and $8 in 2023	137	187	97
Pension and other postretirement benefit plans, net of tax expense of $(3) in 2025, $3 in 2024 and $(2) in 2023	(11)	(4)	(29)
Total other comprehensive income from discontinued operations	126	183	68
Comprehensive income (loss) from discontinued operations	69	(129)	2,550
Comprehensive income (loss)	(701)	(1,110)	2,939
Less: Net income attributable to noncontrolling interests	0	11	7
Less: Other comprehensive income (loss) attributable to noncontrolling interests	0	(16)	(3)
Comprehensive income (loss) attributable to Baxter stockholders	$ (701)	$ (1,105)	$ 2,935