REVENUE RECOGNITION Revenue by Nature (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 6,273	$ 5,704	$ 12,193	$ 10,897
Sales Revenue, Net [Member]
Disaggregation of Revenue [Line Items]
Revenues	6,031	5,461	11,744	10,433
Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenues	96	89	174	158
Collaborative Arrangement [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,716	2,332	5,223	4,404
Collaborative Arrangement [Member] | Sales Revenue, Net [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,570	2,178	4,948	4,098
Collaborative Arrangement [Member] | Collaborative Arrangement [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 146	$ 154	$ 275	$ 306