Derivatives and Other Hedging Instruments (Schedule of the Fair Value of Derivative Instruments) (Details) (Fair Value, Measurements, Recurring [Member], Level 2 Inputs [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset derivatives	$ 265	[1]	$ 121	[1]
Liability derivatives	73	[1]	75	[1]
Derivative assets and liabilities subject to master netting arrangement	67		54
Other accrued liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash collateral	47	[2],[3]	30	[2],[3]
Designated as Hedging Instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset derivatives	11		35
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash collateral	6		17
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset derivatives	0	[3]	29	[3]
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Accounts and Notes Receivable, Net [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset derivatives	1		0
Designated as Hedging Instrument [Member] | Foreign Currency Contract [Member] | Accounts and Notes Receivable, Net [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset derivatives	10		6
Designated as Hedging Instrument [Member] | Foreign Currency Contract [Member] | Other accrued liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability derivatives	10		4
Not Designated as Hedging Instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability derivatives	63		71
Not Designated as Hedging Instrument [Member] | Foreign Currency Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash collateral	41		13
Not Designated as Hedging Instrument [Member] | Foreign Currency Contract [Member] | Accounts and Notes Receivable, Net [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset derivatives	254	[2]	86	[2]
Not Designated as Hedging Instrument [Member] | Foreign Currency Contract [Member] | Other accrued liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability derivatives	62		70
Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] | Other accrued liabilities [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 $67 at December 31, 2014 and $54 at December 31, 2013.

[2] Cash collateral held as of December 31, 2014 and 2013 represents $41 and $13, respectively, related to foreign currency derivatives not designated as hedging instruments.

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