Fair Value Measurements, Derivative Instruments, Gains & Losses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Apr. 30, 2016	Dec. 31, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) in Currency Translation Adjustment on Net Investment Hedge	$ (664)	$ 172
Notional Amount Of Derivatives	6,020	6,700
Foreign Currency Exchange Contracts [Member] | Cost of Sales [Member] | Derivatives Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Effective Portion of Gain (Loss) on Derivative, Net	(1)	(15)
Foreign Currency Exchange Contracts [Member] | Other Expense [Member] | Derivatives Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Effective Portion of Gain (Loss) on Derivative, Net	92	(99)
Fair Value Hedging [Member] | Interest Rate Swaps [Member] | Other Expense [Member] | Derivatives Designated as Fair Value Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Effective Portion of Gain (Loss) on Derivative, Net		21
Ineffective Portion of Gain (Loss) on Derivative, Net	$ (5)	$ (1)
Cash Flow Hedging [Member] | Interest Rate Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Debt Instrument, Term	10 years
Notional Amount Of Derivatives				$ 1,000
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax			$ (46)