BUSINESS OPTIMIZATION CHARGES - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Restructuring Cost and Reserve [Line Items]
Expected additional pre-tax costs	$ 2
Charges	61	$ 44
Employee termination costs
Restructuring Cost and Reserve [Line Items]
Charges	58	26
Employee termination costs | Kidney Care | Reduced Employee Expenses
Restructuring Cost and Reserve [Line Items]
Charges	58	$ 25
Contract termination and other costs
Restructuring Cost and Reserve [Line Items]
Charges	$ 2