Derivatives - Cash Flow Hedges - Gain (Loss) in OCI or Reclassified from AOCI (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Foreign currency forward/option contracts \| Cost of sales
Derivatives in Cash Flow Hedging Relationships
Pretax Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income	$ 18	$ 7
Cash flow hedge
Derivatives in Cash Flow Hedging Relationships
Pretax Gain (Loss) Recognized in Other Comprehensive Income on Derivative	77	13
Pretax Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income	16	7
Cash flow hedge \| Foreign currency forward/option contracts
Derivatives in Cash Flow Hedging Relationships
Pretax Gain (Loss) Recognized in Other Comprehensive Income on Derivative	79	30
Cash flow hedge \| Foreign currency forward/option contracts \| Cost of sales
Derivatives in Cash Flow Hedging Relationships
Pretax Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income	18	7
Cash flow hedge \| Interest rate contracts
Derivatives in Cash Flow Hedging Relationships
Pretax Gain (Loss) Recognized in Other Comprehensive Income on Derivative	(2)	$ (17)
Cash flow hedge \| Interest rate contracts \| Interest expense
Derivatives in Cash Flow Hedging Relationships
Pretax Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income	$ (2)

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669686-108580

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