Financial Instruments - Fair Value And Cash Flow Hedges (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018
Financial Instruments [Abstract]
Cost of sales	[1],[2]	$ 2,576	$ 2,916	$ 5,009	$ 5,479
Other (income)/deductions––net	[2]	$ 126	$ (551)	$ 218	$ (728)

[1] Excludes amortization of intangible assets, except as disclosed in Note 9A. Identifiable Intangible Assets and Goodwill: Identifiable Intangible Assets.

[2] Amounts may not add due to rounding.