FAIR VALUE MEASUREMENTS - Reconciliation of Fair Value Measurements that Use Significant Unobservable Inputs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024	Dec. 31, 2023
Indemnifications related to Kidney Care separation
Contingent payments related to acquisitions
Fair value at beginning of period	$ 57		$ 57		$ 56	$ 0
Additions	1		57
Payments	0		0
Fair value at end of period	57		57
Contingent payments related to acquisitions
Contingent payments related to acquisitions
Fair value at beginning of period	14	$ 12	14	$ 12	$ 12	$ 12	$ 14	$ 14
Additions	0	0	0	0
Change in fair value recognized in earnings	2	0	2	0
Payments	0	(2)	0	(2)
Fair value at end of period	14	12	14	12
Available-for-sale debt securities
Available-for-sale debt securities
Fair value at beginning of period	1	1	1	1
Change in fair value recognized in earnings	0	0	0	0
Payments	0	0	0	0
Additions	0	0	0	0
Fair value at end of period	$ 1	$ 1	$ 1	$ 1