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Financial Instruments, Derivatives and Hedging Activities - Additional information - CF hedges (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Gains or losses on hedging relationships
Amount of Gains (Losses) Recognized in OCI	$ (12)	$ 22
Gain (loss) reclassified from accumulated OCI into earnings	(2)	(4)
Commodity Contracts
Gains or losses on hedging relationships
Amount of Gains (Losses) Recognized in OCI	(10)	20
Commodity Contracts | Cost of sales
Gains or losses on hedging relationships
Gain (loss) reclassified from accumulated OCI into earnings	2	(5)
Foreign Currency Contracts
Gains or losses on hedging relationships
Amount of Gains (Losses) Recognized in OCI	(2)	2
Foreign Currency Contracts | Net sales
Gains or losses on hedging relationships
Gain (loss) reclassified from accumulated OCI into earnings	(3)	1
Interest Rate Contracts | Financing costs, net
Gains or losses on hedging relationships
Gain (loss) reclassified from accumulated OCI into earnings	(1)
Cash Flow Hedging | Commodity Contracts | Cost of sales
Gains or losses on hedging relationships
Gain (loss) reclassified from accumulated OCI into earnings	2	$ (5)
Cash Flow Hedging | Interest Rate Contracts | Financing costs, net
Gains or losses on hedging relationships
Gain (loss) reclassified from accumulated OCI into earnings	$ (1)

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