ACQUISITIONS NARRATIVE (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Nov. 20, 2019
Asset acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired									$ 24,634	$ 1,246	$ 726
Revenues	$ 7,945	$ 6,007	$ 6,273	$ 5,920	$ 5,973	$ 5,691	$ 5,704	$ 5,193	26,145	22,561	20,776
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(1,060)	$ 1,366	$ 1,439	$ 1,715	$ 1,158	$ 1,912	$ 382	$ 1,495	3,460	$ 4,947	$ 975
Business Acquisition, Transaction Costs	$ 657								657
Celgene [Member]
Asset acquisition [Line Items]
Business Acquisition, Share Price												$ 50.00
Business Combination, Potential Payment Per Share Based Upon Future Events												$ 9.00
Payments to Acquire Businesses, Gross									35,745
Payments to Acquire Businesses, Net of Cash Acquired									24,600
Celgene [Member]
Asset acquisition [Line Items]
Revenues									1,900
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest									$ 1,600