GOODWILL AND OTHER INTANGIBLE ASSETS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 20,547	$ 22,488
Other intangible assets
Total other intangible assets, gross	66,859	68,106
Other intangible assets accumulated amortization	(13,616)	(4,137)
Other intangible assets	53,243	63,969
Acquired Developed Product Rights Reclassed From IPRD	13,100
Amortization of intangible assets	9,900	1,300	$ 198
Future estimated amortization, 2021	10,200
Future estimated amortization, 2022	10,100
Future estimated amortization, 2023	9,500
Future estimated amortization, 2024	8,500
Future estimated amortization, 2025	1,200
Impairment of other intangible assets	1,100	66	84
Asset Impairment Charges			$ 64
Inrebic [Member]
Other intangible assets
Impairment of other intangible assets	575
Orva-cel [Member]
Other intangible assets
Impairment of other intangible assets	470
In Process Research and Development [Member]
Other intangible assets
Indefinite-lived Intangible Assets (Excluding Goodwill)	6,130	19,500
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)		32
Licenses [Member]
Other intangible assets
Finite-lived intangible assets, net	$ 328	482
Licenses [Member] | Maximum [Member]
Other intangible assets
Finite-Lived Intangible Asset, Useful Life	15 years
Licenses [Member] | Minimum [Member]
Other intangible assets
Finite-Lived Intangible Asset, Useful Life	5 years
Developed technology rights [Member]
Other intangible assets
Finite-lived intangible assets, net	$ 59,076	46,827
Developed technology rights [Member] | Maximum [Member]
Other intangible assets
Finite-Lived Intangible Asset, Useful Life	15 years
Developed technology rights [Member] | Minimum [Member]
Other intangible assets
Finite-Lived Intangible Asset, Useful Life	3 years
Capitalized Software [Member]
Other intangible assets
Finite-lived intangible assets, net	$ 1,325	$ 1,297
Capitalized Software [Member] | Maximum [Member]
Other intangible assets
Finite-Lived Intangible Asset, Useful Life	10 years
Capitalized Software [Member] | Minimum [Member]
Other intangible assets
Finite-Lived Intangible Asset, Useful Life	3 years