Financial Instruments - Derivative Financial Instruments and Hedging Activities - Footnotes (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 29, 2020	Mar. 31, 2019
Derivative [Line Items]
Amount of (Gains)/Losses Reclassified from OCI into OID and COS	[1],[2]	$ 19	$ (263)
Pre-tax gain expected to be reclassified within the next 12 months		220
Unsecured Debt [Member]
Derivative [Line Items]
Long-term debt		1,800
Foreign currency long-term debt [Member]
Derivative [Line Items]
Long-term debt		1,900
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		$ (70)	$ (44)

[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.