Financial Instruments - Fair Value of Derivative Financial Instruments and Related Notional Amounts (Details) - USD ($) $ in Millions		Mar. 29, 2020	Dec. 31, 2019
Derivative [Line Items]
Asset		$ 1,192	$ 992
Liability		1,248	718
Derivatives designated as hedging instruments [Member]
Derivative [Line Items]
Asset		1,103	909
Liability		1,150	662
Derivatives designated as hedging instruments [Member] | Foreign exchange contracts [Member]
Derivative [Line Items]
Notional	[1]	23,877	25,193
Asset	[1]	955	591
Liability	[1]	1,150	662
Derivatives designated as hedging instruments [Member] | Interest rate contracts [Member]
Derivative [Line Items]
Notional		1,995	6,645
Asset		148	318
Liability		0	0
Derivatives not designated as hedging instruments [Member] | Foreign exchange contracts [Member]
Derivative [Line Items]
Notional		13,402	19,623
Asset		89	82
Liability		97	55
Inventory sales [Member] | Derivatives designated as hedging instruments [Member] | Foreign exchange contracts [Member]
Derivative [Line Items]
Notional	[1]	$ 5,300	$ 5,900

[1] The notional amount of outstanding foreign currency forward-exchange contracts hedging our intercompany forecasted inventory sales was $5.3 billion as of March 29, 2020 and $5.9 billion as of December 31, 2019.