Balance Sheet Effect of Derivative Financial Instruments (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Derivative [Line Items]
Notional	$ 134,914,000,000	$ 129,083,000,000
Derivative Asset	1,895,000,000	1,852,000,000
Derivative Liability	619,000,000	873,000,000
Derivative Asset, Current	1,108,000,000	1,209,000,000
Derivative Liability, Current	371,000,000	692,000,000
Derivative Asset, Noncurrent	787,000,000	643,000,000
Derivative Liability, Noncurrent	248,000,000	181,000,000
Net obligation to return cash collateral	3,000,000	0
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Foreign currency exchange contracts [Member]
Derivative [Line Items]
Notional	19,091,000,000	12,593,000,000
Designated as Hedging Instrument [Member] | Fair Value Hedging [Member] | Interest rate contracts [Member]
Derivative [Line Items]
Notional	33,175,000,000	28,964,000,000
Not Designated as Hedging Instrument [Member] | Foreign currency exchange contracts [Member]
Derivative [Line Items]
Notional	17,227,000,000	21,108,000,000
Not Designated as Hedging Instrument [Member] | Cross-currency interest rate swap contracts [Member]
Derivative [Line Items]
Notional	3,201,000,000	3,137,000,000
Not Designated as Hedging Instrument [Member] | Interest rate contracts [Member]
Derivative [Line Items]
Notional	61,689,000,000	62,638,000,000
Not Designated as Hedging Instrument [Member] | Commodity Contract [Member]
Derivative [Line Items]
Notional	531,000,000	643,000,000
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Derivative [Line Items]
Fair Value of Assets	1,895,000,000	1,852,000,000
Fair Value of Liabilities	619,000,000	873,000,000
Counterparty netting, Assets	554,000,000	733,000,000
Counterparty netting, Liabilities	544,000,000	733,000,000
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Foreign currency exchange contracts [Member]
Derivative [Line Items]
Fair Value of Assets	620,000,000	522,000,000
Fair Value of Liabilities	257,000,000	366,000,000
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Designated as Hedging Instrument [Member] | Fair Value Hedging [Member] | Interest rate contracts [Member]
Derivative [Line Items]
Fair Value of Assets	487,000,000	670,000,000
Fair Value of Liabilities	80,000,000	16,000,000
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Not Designated as Hedging Instrument [Member] | Foreign currency exchange contracts [Member]
Derivative [Line Items]
Fair Value of Assets	379,000,000	426,000,000
Fair Value of Liabilities	194,000,000	242,000,000
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Not Designated as Hedging Instrument [Member] | Cross-currency interest rate swap contracts [Member]
Derivative [Line Items]
Fair Value of Assets	242,000,000	73,000,000
Fair Value of Liabilities	8,000,000	111,000,000
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Not Designated as Hedging Instrument [Member] | Interest rate contracts [Member]
Derivative [Line Items]
Fair Value of Assets	156,000,000	159,000,000
Fair Value of Liabilities	74,000,000	112,000,000
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contract [Member]
Derivative [Line Items]
Fair Value of Assets	11,000,000	2,000,000
Fair Value of Liabilities	$ 6,000,000	$ 26,000,000