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Derivatives And Hedging Activities Effect of Derivative Instruments in Consolidated Statement of Operations (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Designated as Hedging Instrument |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Loss recognized in OCI (Effective Portion) | $ (33) | $ (15) | $ 24
Loss Reclassified from Accumulated OCI into Income (Effective Portion) | 0 | 7 | 126
Gain Recognized in Income (Ineffective Portion Excluded from Effectiveness Testing) | 0 | 0 | 0
Designated as Hedging Instrument | Cash Flow Hedging | Commodity Derivative |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Loss recognized in OCI (Effective Portion) | (45) | 45 | (22)
Derivative Instruments, Gain Reclassified from Accumulated OCI into Income, Effective Portion | 14 | 18 |
Loss Reclassified from Accumulated OCI into Income (Effective Portion) |  |  | 42
Gain Recognized in Income (Ineffective Portion Excluded from Effectiveness Testing) | 0 | 0 | 0
Designated as Hedging Instrument | Cash Flow Hedging | Foreign Currency Derivative |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Loss recognized in OCI (Effective Portion) | 14 | (4) | 62
Loss Reclassified from Accumulated OCI into Income (Effective Portion) | 14 | 27 | 84
Gain Recognized in Income (Ineffective Portion Excluded from Effectiveness Testing) | 0 | 0 | 0
Designated as Hedging Instrument | Net Investment Hedging | Foreign Currency Derivative |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Loss recognized in OCI (Effective Portion) | 2 | (34) | 16
Derivative Instruments, Gain Reclassified from Accumulated OCI into Income, Effective Portion | 0 | 2 |
Loss Reclassified from Accumulated OCI into Income (Effective Portion) |  |  | 0
Gain Recognized in Income (Ineffective Portion Excluded from Effectiveness Testing) | 0 | 0 | 0
Not Designated as Hedging Instrument |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Gain on Derivative | (2) |  | (1)
Derivative, Loss on Derivative |  | 5 |
Not Designated as Hedging Instrument | Foreign Currency Derivative |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Gain on Derivative | $ (2) |  | $ (1)
Derivative, Loss on Derivative |  | $ 5 |

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- Definition Amount of increase in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959 + 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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- Definition The effective portion of gain reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
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- Definition The portion of gains on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109977999&loc=d3e76258-113986 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
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- Definition The effective portion of loss reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
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- Definition Amount of decrease in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959 + Details
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- Definition Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e637-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109978405&loc=d3e80720-113993 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580 + Details
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