REVENUE RECOGNITION Revenue by Nature (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 6,007	$ 5,691	$ 18,200	$ 16,588
Net product sales [Member]
Disaggregation of Revenue [Line Items]
Revenues	5,768	5,433	17,512	15,866
Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenues	96	81	270	239
Collaborative Arrangement [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,607	2,214	7,830	6,618
Collaborative Arrangement [Member] | Net product sales [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,464	2,037	7,412	6,135
Collaborative Arrangement [Member] | Collaborative Arrangement [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 143	$ 177	$ 418	$ 483