FINANCIAL INSTRUMENTS - Income statement (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Net sales	$ 10,165	$ 10,168	$ 10,530
Cost of sales	8,255	8,067	8,300
Selling, general and administrative expenses	951	873	946
Other comprehensive income (loss)	76	(53)	(170)
Gain (loss) on cash flow hedging relationships:
Gain (loss) recognized in other comprehensive income (loss)	(1)	(1)	(1)
Cash Flow Hedging | Foreign currency | Gain (loss) reclassified from AOCI to income
Derivatives, Fair Value [Line Items]
Net sales	0	(5)	(2)
Cost of sales	1	1	(1)
Selling, general and administrative expenses	$ (2)	$ 3	$ 0