ACQUISITIONS, DIVESTITURES, LICENSING AND OTHER ARRANGEMENTS - Divestitures (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Divestiture proceeds	$ 1,157	$ 748	$ 715
Divestiture gains (Note 4)	(211)	(9)	(55)
Royalty Income	(832)	(666)	(644)
Diabetes business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Divestiture proceeds	767	612	558
Divestiture gains (Note 4)	0	0	0
Royalty Income	(810)	(622)	(567)
Mature products and other
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Divestiture proceeds	390	136	157
Divestiture gains (Note 4)	(211)	(9)	(55)
Royalty Income	(22)	(44)	(77)
Not all inclusive
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Divestiture gains (Note 4)	$ (211)	$ (9)	$ (55)