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Financial Instruments Energy (Details) (Energy Segment [Member], USD $) In Millions, unless otherwise specified |  |  |  |  | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended |  |
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Sep. 30, 2013 Commodity contracts Not Designated as Hedging Instrument [Member] Accrued expenses and other liabilities [Member] | Sep. 30, 2013 Swap [Member] Commodity contracts Not Designated as Hedging Instrument [Member] bbl | Dec. 31, 2012 Swap [Member] Commodity contracts Not Designated as Hedging Instrument [Member] bbl | Sep. 30, 2013 Swap [Member] Commodity contracts Not Designated as Hedging Instrument [Member] Accrued expenses and other liabilities [Member] | Dec. 31, 2012 Swap [Member] Commodity contracts Not Designated as Hedging Instrument [Member] Accrued expenses and other liabilities [Member] | Sep. 30, 2013 Other income (loss), net [Member] Commodity contracts Not Designated as Hedging Instrument [Member] | Sep. 30, 2012 Other income (loss), net [Member] Commodity contracts Not Designated as Hedging Instrument [Member] | Sep. 30, 2013 Other income (loss), net [Member] Commodity contracts Not Designated as Hedging Instrument [Member] | Sep. 30, 2012 Other income (loss), net [Member] Commodity contracts Not Designated as Hedging Instrument [Member] | Sep. 30, 2013 Other income (loss), net [Member] Swap [Member] Commodity contracts Not Designated as Hedging Instrument [Member] | Sep. 30, 2012 Other income (loss), net [Member] Swap [Member] Commodity contracts Not Designated as Hedging Instrument [Member] | Sep. 30, 2013 Other income (loss), net [Member] Swap [Member] Commodity contracts Not Designated as Hedging Instrument [Member] | Sep. 30, 2012 Other income (loss), net [Member] Swap [Member] Commodity contracts Not Designated as Hedging Instrument [Member] | Sep. 30, 2013 Cash Flow Hedging [Member] Interest rate swap contracts Designated as Hedging Instrument [Member] | Jul. 02, 2012 Cash Flow Hedging [Member] Interest rate swap contracts Designated as Hedging Instrument [Member] | Sep. 30, 2013 Debt Facility [Member] Term Loan [Member]
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative contract at fair value (liability) | $ 1 |  |  | $ 110 | $ 67 |  |  |  |  |  |  |  |  |  |  |
Realized loss on commodity derivatives |  |  |  |  |  | 1 | 7 | 2 | 4 | 72 | 162 | 175 | 168 |  |  |
Barrels of crack spreads hedging margin on future gasoline and distillate production |  | 20,600,000 | 23,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Balance of debt partially hedged |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 125
Notional value of interest rate swap agreements |  |  |  |  |  |  |  |  |  |  |  |  |  | 63 |  |
Lower fixed interest rate paid on interest rate swaps |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.94% | 1.975% |
Frequency of interest rate swap settlements |  |  |  |  |  |  |  |  |  |  |  |  |  | 90 days |  |
Average fixed interest rate paid on interest rate swaps |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.96% |  |
Effective interest rate on debt hedged |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.60%
Realized loss on interest rate swaps reclassified from AOCI into interest expense |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1 |  |

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- Definition Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract. + 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 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 Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of the hedged item as of the balance sheet date related to the derivative. For example, the hedged balance on a debt instrument. + References No definition available. + Details
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- Definition Fair value of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be offset against a right to receive collateral under a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=20225523&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41678-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=28370219&loc=SL20226011-175313 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=28370219&loc=SL20226006-175313 + Details
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- Definition Fixed interest rate related to the interest rate derivative. + References No definition available. + 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=7476318&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=7476318&loc=SL5624171-113959 + Details
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- Definition The difference between the book value and the sale price of agreements to purchase or sell mineral resources, energy, and agricultural products at some future point. This element refers to the gain (loss) included in earnings and not to the cash proceeds. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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