BUSINESS OPTIMIZATION CHARGES - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Restructuring Cost and Reserve [Line Items]
Expected additional pre-tax costs	$ 1		$ 1
Charges	37	$ 15	95	$ 36
Exit Of Product Line
Restructuring Cost and Reserve [Line Items]
Charges	21		24
Employee termination costs
Restructuring Cost and Reserve [Line Items]
Charges	18	12	49	29
Employee termination costs | Kidney Care | Reduced Employee Expenses
Restructuring Cost and Reserve [Line Items]
Charges	10		41
Employee termination costs | Exit Of Product Line
Restructuring Cost and Reserve [Line Items]
Charges	5		5
Asset write offs | Exit Of Product Line
Restructuring Cost and Reserve [Line Items]
Charges	8		11
Asset write offs | New Operating Model
Restructuring Cost and Reserve [Line Items]
Charges		7		14
Contract termination and other costs
Restructuring Cost and Reserve [Line Items]
Charges	10	$ 3	14	7
Contract termination and other costs | Exit Of Product Line
Restructuring Cost and Reserve [Line Items]
Charges	$ 8		$ 8
Contract termination and other costs | New Operating Model
Restructuring Cost and Reserve [Line Items]
Charges				$ 7