Fair Value Measurements, Derivative Instruments, Gains & Losses (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Currency Exchange Contracts [Member] | Cost of Product Revenues [Member] | Derivatives Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative, Net	$ 2	$ (2)
Currency Exchange Contracts [Member] | Other Expense, Net [Member] | Derivatives Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative, Net	17	(8)
Fair Value Hedging [Member] | Interest Rate Swaps [Member] | Other Expense, Net [Member] | Derivatives Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Hedged Debt in Fair Value Hedge	(28)	42
Gain (Loss) on Derivative, Net	29	(38)
Cash Flow Hedging [Member] | Interest Rate Swaps [Member] | Other Expense, Net [Member] | Derivatives Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	(3)	(3)
Net Investment Hedging [Member] | Foreign currency-denominated debt [Member] | Derivatives Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) in Currency Translation Adjustment on Net Investment Hedge	156	$ (200)
Net Investment Hedging [Member] | Cross Currency Interest Rate Contract [Member] | Derivatives Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) in Currency Translation Adjustment on Net Investment Hedge	37
Net Investment Hedging [Member] | Cross Currency Interest Rate Contract [Member] | Other Expense, Net [Member] | Derivatives Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative, Net	$ 14