Derivative and Other Financial Instruments (Notional Values of Outstanding Derivative Instruments in the Consolidated Balance Sheet) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Foreign Exchange [Member]
Derivatives, Fair Value [Line Items]
Derivatives	$ 922	$ 678
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Commodities [Member]
Derivatives, Fair Value [Line Items]
Derivatives	324	213
Designated as Hedging Instrument [Member] | Fair Value Hedging [Member] | Foreign Exchange [Member]
Derivatives, Fair Value [Line Items]
Derivatives	125	85
Not Designated as Hedging Instrument [Member] | Foreign Exchange [Member]
Derivatives, Fair Value [Line Items]
Derivatives	674	603
Not Designated as Hedging Instrument [Member] | Commodities [Member]
Derivatives, Fair Value [Line Items]
Derivatives	$ 57	$ 0