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Financial Instruments, Derivatives and Hedging Activities - Location of Gain or (Losses) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Hedging relationships
Income (expense) reported in earnings	$ 140	$ 132	$ 431	$ 483
Net sales before shipping and handling costs
Hedging relationships
Income (expense) reported in earnings	1,574	1,563	4,660	4,752
Cost of sales
Hedging relationships
Income (expense) reported in earnings	(1,113)	(1,116)	(3,322)	(3,367)
Financing costs, net
Hedging relationships
Income (expense) reported in earnings	(24)	(24)	(62)	(65)
Fair Value Hedging \| Interest Rate Contracts \| Financing costs, net
Hedging relationships
Hedged item		1	(3)	4
Derivatives designated as hedging instruments		(1)	3	(4)
Cash Flow Hedging
Hedging relationships
Gain (loss) reclassified from accumulated OCI into earnings	3	(2)	(3)	(5)
Cash Flow Hedging \| Commodity Contracts \| Cost of sales
Hedging relationships
Gain (loss) reclassified from accumulated OCI into earnings	2	$ (2)	(1)	(5)
Cash Flow Hedging \| Foreign Currency Contracts \| Net sales before shipping and handling costs
Hedging relationships
Gain (loss) reclassified from accumulated OCI into earnings	$ 1		(2)	2
Cash Flow Hedging \| Foreign Currency Contracts \| Cost of sales
Hedging relationships
Gain (loss) reclassified from accumulated OCI into earnings			1	(1)
Cash Flow Hedging \| Interest Rate Contracts \| Financing costs, net
Hedging relationships
Gain (loss) reclassified from accumulated OCI into earnings			$ (1)	$ (1)