REVENUE RECOGNITION Revenue by Nature (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Total Revenues	$ 11,073	$ 10,781
Net product sales [Member]
Disaggregation of Revenue [Line Items]
Total Revenues	10,798	10,541
Other revenues [Member]
Disaggregation of Revenue [Line Items]
Total Revenues	133	135
Collaborative Arrangement [Member]
Disaggregation of Revenue [Line Items]
Total Revenues	3,024	2,828
Collaborative Arrangement [Member] | Net product sales [Member]
Disaggregation of Revenue [Line Items]
Total Revenues	2,882	2,723
Collaborative Arrangement [Member] | Collaborative Arrangement [Member]
Disaggregation of Revenue [Line Items]
Total Revenues	$ 142	$ 105