ACQUISITIONS, DIVESTITURES, LICENSING AND OTHER ARRANGEMENTS - Schedule of Consideration Transferred (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	Nov. 20, 2019	Dec. 31, 2021	Nov. 21, 2019	Nov. 19, 2019
Business Acquisition [Line Items]
Closing share price (in usd per share)		$ 62.35		$ 56.48
Celgene
Business Acquisition [Line Items]
Number of shares acquired (in shares)				714.9
Business acquisition, share price (in usd per share)	$ 50.00
Cash consideration for outstanding shares	$ 35,745
Estimated fair value of share consideration	40,378
CVR closing price per share (in usd per share)			$ 2.30
Fair value of CVRs	1,644
Fair value of replacement options	1,428
Fair value of replacement restricted share awards	987
Fair value of CVRs issued to option and share award holders	87
Fair value of shared-based compensation awards attributable to pre-combination service	2,502
Total consideration transferred	80,269
Fair value of awards attributed to post-combination services	$ 1,000