Financial Instruments - Derivative Financial Instruments and Hedging Activities - Footnotes (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Oct. 03, 2021	Sep. 27, 2020	Oct. 03, 2021	Sep. 27, 2020	Dec. 31, 2020
Derivative [Line Items]
Amount of Gains/(Losses) Reclassified from OCI into OID and COS	[1]	$ (48)	$ (143)	$ (286)	$ 25
Pre-tax gain expected to be reclassified within the next 12 months		202		202
Short-term borrowings		3,629		3,629		$ 2,703
Foreign currency debt [Member]
Derivative [Line Items]
Short-term borrowings		1,200		1,200
Long-term debt		862		$ 862		$ 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		$ (18)	$ 34	$ (94)	$ 184

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