GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of Intangible Assets By Major Class (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 20,500	$ 20,502
Gross other intangible assets	66,038	66,010
Less accumulated amortization	(25,935)	(23,483)
Other intangible assets	40,103	42,527
IPRD
Finite-Lived Intangible Assets [Line Items]
IPRD	3,710	3,750
Licenses
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, net	307	307
Acquired marketed product rights
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, net	60,477	60,454
Capitalized software
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, net	$ 1,544	$ 1,499
Minimum | Licenses
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	5 years
Minimum | Acquired marketed product rights
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	3 years
Minimum | Capitalized software
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	3 years
Maximum | Licenses
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	15 years
Maximum | Acquired marketed product rights
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	15 years
Maximum | Capitalized software
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	10 years