RESTRUCTURING SCHEDULE OF RESTRUCTURING RESERVE (Details) - USD ($) $ in Millions				12 Months Ended
	Jan. 01, 2019	Jan. 01, 2018	Jan. 01, 2017	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2020	Dec. 31, 2017
Restructuring Reserve	$ 96	$ 186		$ 148	$ 100	$ 99	$ 100	$ 186
Restructuring Reserve, Translation and Other Adjustment	$ 0	$ (3)	$ 0
Provision for restructuring				530	301	131
Restructuring Reserve, Foreign Currency Translation Gain (Loss)				6	(1)	1
Payments for Restructuring				(418)	(151)	(219)
Restructuring Reserve, Accrual Adjustment				10	4	17
Restructuring Charges				460	156	$ 131
Accelerated Stock Based Compensation [Member] | Celgene Integration [Member]
Provision for restructuring				$ 70	$ 145