REVENUE - RECONCILIATION (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue from customers	$ 17,130	$ 19,192
All other revenue	679	1,719
Net sales	$ 17,809	$ 20,911	$ 17,824