Financial Instruments - Derivative Financial Instruments and Hedging Activities - Footnotes (Details) - USD ($) $ in Millions		3 Months Ended
		Apr. 04, 2021	Mar. 29, 2020	Dec. 31, 2020
Derivative [Line Items]
Amount of Gains/(Losses) Reclassified from OCI into OID and COS	[1]	$ (259)	$ (19)
Pre-tax loss expected to be reclassified within the next 12 months		20
Short-term borrowings		4,352		$ 2,703
Foreign currency debt [Member]
Derivative [Line Items]
Short-term borrowings		1,200
Long-term debt		$ 872		$ 2,100
Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member]
Derivative [Line Items]
Remaining period of hedging exposure		22 years
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		$ (45)	$ 70

[1] Reclassified into Other (income)/deductions—net and Cost of sales. See Note 7E.