Financial Instruments (Schedule of the Fair Value of Derivative Instruments) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets and liabilities subject to master netting arrangement	$ 45		$ 54
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset derivatives	301	[1]	121	[1]
Liability derivatives	49	[1]	75	[1]
Designated as Hedging Instrument [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset derivatives	23		35
Not Designated as Hedging Instrument [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability derivatives	49		71
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash collateral	6		17
Foreign Currency Contract [Member] | Not Designated as Hedging Instrument [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash collateral	104		13
Other Assets [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset derivatives	0	[2]	29	[2]
Accounts and Notes Receivable [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset derivatives	8	[2]	0	[2]
Accounts and Notes Receivable [Member] | Foreign Currency Contract [Member] | Designated as Hedging Instrument [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset derivatives	15		6
Accounts and Notes Receivable [Member] | Foreign Currency Contract [Member] | Not Designated as Hedging Instrument [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset derivatives	278	[3]	86	[3]
Other accrued liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash collateral	110	[2],[3]	30	[2],[3]
Other accrued liabilities [Member] | Foreign Currency Contract [Member] | Designated as Hedging Instrument [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability derivatives	0		4
Other accrued liabilities [Member] | Foreign Currency Contract [Member] | Not Designated as Hedging Instrument [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability derivatives	48		70
Other accrued liabilities [Member] | Commodity Contract [Member] | Not Designated as Hedging Instrument [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability derivatives	$ 1		$ 1

[1] The company's derivative assets and liabilities subject to enforceable master netting arrangements totaled $45 at September 30, 2014 and $54 at December 31, 2013.

[2] Cash collateral held as of September 30, 2014 and December 31, 2013 represents $6 and $17, respectively, related to interest rate swap derivatives designated as hedging instruments.

[3] Cash collateral held as of September 30, 2014 and December 31, 2013 represents $104 and $13, respectively, related to foreign currency derivatives not designated as hedging instruments.