Financial Instruments - Derivative Financial Instruments and Hedging Activities - Footnotes (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
Derivative [Line Items]
Amount of (Gains)/Losses Reclassified from OCI into OID and COS	[1],[2]	$ (186)	$ (81)	$ (167)	$ (343)
Pre-tax gain expected to be reclassified within the next 12 months		102		102
Unsecured Debt [Member]
Derivative [Line Items]
Long-term debt		1,800		1,800
Foreign currency long-term debt [Member]
Derivative [Line Items]
Long-term debt		2,000		2,000
Designated as Hedging Instrument [Member] | Cost of sales [Member] | Foreign exchange contracts [Member]
Derivative [Line Items]
Amount of (Gains)/Losses Reclassified from OCI into OID and COS		$ (80)	$ (59)	$ (150)	$ (103)

[1] Amounts may not add due to rounding.

[2] Reclassified into Other (income)/deductions—net and Cost of sales in the condensed consolidated statements of income. For additional information on amounts reclassified into Other (income)/deductions—net and Cost of sales, see Note 7E. Financial Instruments: Derivative Financial Instruments and Hedging Activities.