Fair Value Measurements, Derivative Instruments, Gains & Losses (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) in Currency Translation Adjustment on Net Investment Hedge	$ (200)	$ (46)
Currency Exchange Contracts [Member] | Cost of Sales [Member] | Derivatives Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative, Net	(2)	(1)
Currency Exchange Contracts [Member] | Other Expense [Member] | Derivatives Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative, Net	(8)	19
Fair Value Hedging [Member] | Interest Rate Swaps [Member] | Other Expense [Member] | Derivatives Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Hedged Debt in Fair Value Hedge	(38)	(6)
Gain (Loss) on Derivative, Net	42	3
Cash Flow Hedging [Member] | Interest Rate Swaps [Member] | Other Expense [Member] | Derivatives Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	$ (3)	$ (3)