Financial Instruments - Income Statement (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Derivatives, Fair Value
Net sales	$ 2,534	$ 2,492	$ 6,239	$ 7,609
Cost of sales	2,017	1,968	5,101	6,053
Selling, general and administrative expenses	204	230	601	668
Other comprehensive income (loss)	57	(109)	(3)	(105)
Gain (loss) on cash flow hedging relationships:
Gain (loss) recognized in other comprehensive income (loss)	1	0	(1)	(1)
Cash Flow Hedging | Foreign currency | Gain (loss) reclassified from AOCI to income
Derivatives, Fair Value
Net sales	0	(2)	0	(4)
Cost of sales	0	0	0	1
Selling, general and administrative expenses	$ 0	$ 1	$ (1)	$ 2