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Financial Instruments (Schedule Of Effect Of Derivatives Recognized) (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2016
Schedule of Cost-method Investments [Line Items] |  |  |  |  |
Long-term Debt, Current Maturities | $ 26 |  | $ 26 |  | $ 279
Derivatives not designated as hedging instruments | (50) | $ 25 | (67) | $ (4) |
Interest Rate Swaps [Member] |  |  |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |  |  |
Derivative, Notional Amount | 1,800 |  | 1,800 |  |
Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member] |  |  |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |  |  |
Interest rate swaps | (2) | (5) | (1) | (8) |
Designated As Hedging Instruments [Member] | Foreign Exchange Contracts [Member] |  |  |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |  |  |
Interest rate swaps | (26) | 7 | (31) | (7) |
Not Designated As Hedging Instruments [Member] | Foreign Exchange Contracts [Member] |  |  |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |  |  |
Derivatives not designated as hedging instruments | (21) | 22 | (33) | 12 |
Not Designated As Hedging Instruments [Member] | Commodity Contracts [Member] |  |  |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |  |  |
Derivatives not designated as hedging instruments | (1) | 2 | (2) | 0 |
Not Designated As Hedging Instruments [Member] | Interest Rate Contracts [Member] |  |  |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |  |  |
Derivatives not designated as hedging instruments | 0 | (1) | 0 | (1) |
Operating Expense [Member] |  |  |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |  |  |
Derivatives not designated as hedging instruments | 10 | 4 | 15 | 23 |
Interest Expense [Member] |  |  |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |  |  |
Derivatives not designated as hedging instruments | $ 11 | $ 26 | $ 18 | $ 35 |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 + Details
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- Definition The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 + Details
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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