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Financial Instruments (Schedule of the Fair Value of Derivative Instruments) (Details) - USD ($) $ in Millions | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets and liabilities subject to master netting arrangement |  | $ 48 | $ 114
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 | [1] | 66 | 182
Liability derivatives | [1] | 69 | 121
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 | [2] | 60 | 182
Accounts and Notes Receivable [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] |  |  |
Asset derivatives |  | 6 | 0
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 | [2] | 0 | 52
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 |  | $ 69 | $ 121
[1] | The company's derivative assets and liabilities subject to enforceable master netting arrangements totaled $48 at March 31, 2017 and $114 at December 31, 2016.
[2] | Cash collateral held as of March 31, 2017 and December 31, 2016 is related to foreign currency derivatives not designated as hedging instruments.

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