REVENUE RECOGNITION Revenue by Nature (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 5,920	$ 5,193
Sales Revenue, Net [Member]
Disaggregation of Revenue [Line Items]
Revenues	5,713	4,972
Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenues	78	69
Collaborative Arrangement [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,507	2,072
Collaborative Arrangement [Member] | Sales Revenue, Net [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,378	1,920
Collaborative Arrangement [Member] | Collaborative Arrangement [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 129	$ 152