GOODWILL AND INTANGIBLE ASSETS - ADDITIONAL INFORMATION (Details)			3 Months Ended		12 Months Ended
	Jan. 01, 2019 reporting_unit	Dec. 31, 2018 USD ($) reporting_unit	Mar. 31, 2020 USD ($) reporting_unit	Mar. 31, 2019 USD ($)	Dec. 31, 2020 USD ($) reporting_unit	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Goodwill [Line Items]
Number of reporting units | reporting_unit	5	11	5		5
Goodwill		$ 3,431,000,000			$ 3,986,000,000	$ 3,397,000,000	$ 3,431,000,000
Impairment					157,000,000	0	1,086,000,000
Indefinite-lived intangible asset impairment				$ 5,000,000	39,000,000	5,000,000	179,000,000
Amortization of intangible assets					192,000,000	190,000,000	198,000,000
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2021					216,000,000
2022					215,000,000
2023					217,000,000
2024					219,000,000
2025					223,000,000
Tradenames and trademarks
Goodwill [Line Items]
Indefinite-lived intangibles, carrying amount					$ 642,000,000	628,000,000
C O V I D19 [Member]
Goodwill [Line Items]
Number of reporting units | reporting_unit			4
Minimum
Goodwill [Line Items]
Indefinite lived intangible asset, discount rate			10.00%
Minimum | Measurement Input, Discount Rate [Member]
Goodwill [Line Items]
Goodwill, measurement input					0.090
Minimum | Measurement Input, Discount Rate [Member] | C O V I D19 [Member]
Goodwill [Line Items]
Goodwill, measurement input			0.095
Maximum
Goodwill [Line Items]
Indefinite lived intangible asset, discount rate			17.50%
Maximum | Measurement Input, Discount Rate [Member]
Goodwill [Line Items]
Goodwill, measurement input					0.115
Maximum | Measurement Input, Discount Rate [Member] | C O V I D19 [Member]
Goodwill [Line Items]
Goodwill, measurement input			0.115
Technologies & Equipment
Goodwill [Line Items]
Goodwill		$ 2,545,000,000			$ 3,092,000,000	$ 2,516,000,000	2,545,000,000
Impairment					157,000,000		$ 1,086,000,000
Equipment And Instruments Reporting Unit | Tradenames and trademarks
Goodwill [Line Items]
Indefinite-lived intangibles, carrying amount					82,000,000
Indefinite-lived intangible asset impairment			$ 39,000,000
Equipment And Instruments Reporting Unit | Technologies & Equipment
Goodwill [Line Items]
Goodwill					292,000,000
Equipment And Instruments Reporting Unit | Technologies & Equipment | C O V I D19 [Member]
Goodwill [Line Items]
Impairment			$ 157,000,000
MIS Implants Technologies Ltd. and Health Consumable Business | Technologies & Equipment
Goodwill [Line Items]
Goodwill					$ 1,232,000,000