DEBT AND CREDIT FACILITIES - Additional Information (Details) € in Millions		1 Months Ended		12 Months Ended			25 Months Ended
	Jan. 31, 2025 USD ($)	Dec. 31, 2025 USD ($)	Feb. 28, 2025 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2025 USD ($)	Jun. 11, 2025 USD ($)	Nov. 30, 2024 USD ($)	Jul. 17, 2024 USD ($)	Oct. 31, 2023 EUR (€)	May 31, 2019 EUR (€)
Debt Instrument [Line Items]
Repayments of debt				$ 5,489,000,000	$ 2,657,000,000	$ 2,634,000,000
Debt obligations		$ 9,476,000,000		9,476,000,000	13,126,000,000		$ 9,476,000,000
Gain on early extinguishment of debt				16,000,000	0	0
Discontinued Operations, Disposed of by Sale | Kidney Care
Debt Instrument [Line Items]
Proceeds	$ 3,300,000,000
Commercial paper
Debt Instrument [Line Items]
Debt obligations		$ 0		$ 0	300,000,000		$ 0
Weighted-average interest rate		4.78%		4.78%			4.78%
Original weighted-average term				45 days
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit, current borrowing capacity						$ 2,050,000,000.00			$ 1,830,000,000
Revolving Credit Facility | Commercial paper
Debt Instrument [Line Items]
Line of credit, current borrowing capacity		$ 1,790,000,000		$ 1,790,000,000			$ 1,790,000,000
Other Line Of Credit
Debt Instrument [Line Items]
Credit facility, maximum capacity		385,000,000		385,000,000	412,000,000		385,000,000
Line of credit, borrowings outstanding		0		0	0		0
Term loan maturing 2027
Debt Instrument [Line Items]
Repayments of debt		645,000,000	$ 1,000,000,000
Debt obligations		$ 1,640,000,000		$ 1,640,000,000			$ 1,640,000,000
Debt term		5 years		5 years			5 years
2.6% notes due 2026
Debt Instrument [Line Items]
Debt obligations		$ 0		$ 0	749,000,000		$ 0
Senior notes, coupon rates		2.60%		2.60%			2.60%
1.915% notes due 2027
Debt Instrument [Line Items]
Debt obligations		$ 834,000,000		$ 834,000,000	1,446,000,000		$ 834,000,000
Senior notes, coupon rates		1.915%		1.915%			1.915%
2026 and 2027 Senior Notes | Maximum
Debt Instrument [Line Items]
Repayments of debt		$ 600,000,000
4.45% notes due 2029
Debt Instrument [Line Items]
Debt obligations		$ 298,000,000		$ 298,000,000	0		$ 298,000,000
Senior notes, coupon rates		4.45%		4.45%			4.45%
Senior notes		$ 300,000,000		$ 300,000,000			$ 300,000,000
4.9% notes due 2030
Debt Instrument [Line Items]
Debt obligations		$ 695,000,000		$ 695,000,000	0		$ 695,000,000
Senior notes, coupon rates		4.90%		4.90%			4.90%
Senior notes		$ 700,000,000		$ 700,000,000			$ 700,000,000
5.65% notes due 2035
Debt Instrument [Line Items]
Debt obligations		$ 991,000,000		$ 991,000,000	0		$ 991,000,000
Senior notes, coupon rates		5.65%		5.65%			5.65%
Senior notes		$ 1,000,000,000.00		$ 1,000,000,000.00			$ 1,000,000,000.00
2026 Senior Notes
Debt Instrument [Line Items]
Repayments of debt							$ 750,000,000
2027 Senior Notes
Debt Instrument [Line Items]
Repayments of debt		$ 600,000,000
7.0% Notes Due 2024
Debt Instrument [Line Items]
Repayments of debt					$ 13,000,000
Senior notes, coupon rates					7.00%
0.40% Senior Notes Due May 2024
Debt Instrument [Line Items]
Repayments of debt					$ 809,000,000
Senior notes, coupon rates					0.40%						0.40%	0.40%
Senior notes | €											€ 750	€ 750
1.322% Notes Due 2024
Debt Instrument [Line Items]
Repayments of debt					$ 1,400,000,000
Senior notes, coupon rates					1.322%
Floating-Rate Notes Due 2024
Debt Instrument [Line Items]
Repayments of debt					$ 300,000,000
Term Loan Due 2024
Debt Instrument [Line Items]
Repayments of debt					$ 130,000,000
Debt term		3 years		3 years	3 years		3 years
Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Credit facility, maximum capacity								$ 2,200,000,000
Revolving Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit, borrowings outstanding		$ 0		$ 0			$ 0
Revolving Credit Facility | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Credit facility, maximum capacity								300,000,000
Increase amount								1,100,000,000
Aggregate commitment maximum amount								$ 3,300,000,000
Senior Unsecured Term Loans | Line of Credit
Debt Instrument [Line Items]
Line of credit, borrowings outstanding	$ 1,830,000,000				$ 1,830,000,000
Senior Unsecured Term Loans | Bridge Facility
Debt Instrument [Line Items]
Credit facility, maximum capacity										$ 2,050,000,000.00
Senior Notes
Debt Instrument [Line Items]
Senior notes, coupon rates										1.322%
Interest rate				0.25%