Financial Instruments - Fair Value of Derivative Financial Instruments and Related Notional Amounts (Details) - USD ($) $ in Millions		Jun. 28, 2020	Dec. 31, 2019
Derivative [Line Items]
Asset		$ 792	$ 992
Liability		993	718
Derivatives designated as hedging instruments [Member]
Derivative [Line Items]
Asset		708	909
Liability		914	662
Derivatives designated as hedging instruments [Member] | Foreign exchange contracts [Member]
Derivative [Line Items]
Notional	[1]	22,543	25,193
Asset	[1]	551	591
Liability	[1]	914	662
Derivatives designated as hedging instruments [Member] | Interest rate contracts [Member]
Derivative [Line Items]
Notional		1,995	6,645
Asset		158	318
Liability		0	0
Derivatives not designated as hedging instruments [Member] | Foreign exchange contracts [Member]
Derivative [Line Items]
Notional		14,433	19,623
Asset		84	82
Liability		79	55
Inventory sales [Member] | Derivatives designated as hedging instruments [Member] | Foreign exchange contracts [Member]
Derivative [Line Items]
Notional	[1]	$ 5,200	$ 5,900

[1] The notional amount of outstanding foreign currency forward-exchange contracts hedging our intercompany forecasted inventory sales was $5.2 billion as of June 28, 2020 and $5.9 billion as of December 31, 2019.