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Financial Instruments Energy (Details) (USD $) In Millions, unless otherwise specified |  |  |  | 8 Months Ended | 12 Months Ended |  |
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Dec. 31, 2012 Commodity contracts Not Designated as Hedging Instrument [Member] Accrued Expenses and Other Liabilities [Member] | Dec. 31, 2011 Commodity contracts Not Designated as Hedging Instrument [Member] Accrued Expenses and Other Liabilities [Member] | Dec. 31, 2012 Energy Segment [Member] Commodity contracts Not Designated as Hedging Instrument [Member] Other Assets [Member] | Dec. 31, 2012 Swap [Member] Energy Segment [Member] Commodity contracts Not Designated as Hedging Instrument [Member] bbl | Dec. 31, 2012 Other Income (Loss) [Member] Energy Segment [Member] Commodity contracts Not Designated as Hedging Instrument [Member] | Dec. 31, 2012 Other Income (Loss) [Member] Swap [Member] Energy Segment [Member] Commodity contracts Not Designated as Hedging Instrument [Member] | Dec. 31, 2012 Cash Flow Hedging [Member] Energy Segment [Member] Interest rate swap contracts Designated as Hedging Instrument [Member] | Dec. 31, 2012 Cash Flow Hedging [Member] Energy Segment [Member] Interest rate swap contracts Designated as Hedging Instrument [Member] | Jul. 02, 2012 Cash Flow Hedging [Member] Energy Segment [Member] Interest rate swap contracts Designated as Hedging Instrument [Member] | Dec. 31, 2012 Debt Facility [Member] Term Loan [Member] Energy Segment [Member]
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Fair value of open commodity positions, net liability | $ 68 | [1] | $ 0 | [1] | $ 1 |  |  | $ 67 |  |  |  |
Realized loss on commodity derivatives |  |  |  |  |  |  | 4 | 176 |  |  |  |
Barrels of crack spreads hedging margin on future gasoline and distillate production |  |  |  |  |  | 23,300,000 |  |  |  |  |  |
Balance of debt partially hedged |  |  |  |  |  |  |  |  |  |  |  | 125
Notional value of interest rate swap agreements |  |  |  |  |  |  |  |  | 63 | 63 |  |
Lower fixed interest rate paid on interest rate swaps |  |  |  |  |  |  |  |  | 1.94% | 1.94% | 1.975% |
Frequency of interest rate swap settlements |  |  |  |  |  |  |  |  |  | 90 days |  |
Average fixed interest rate paid on interest rate swaps |  |  |  |  |  |  |  |  | 1.96% | 1.96% |  |
Effective interest rate on debt hedged |  |  |  |  |  |  |  |  |  |  |  | 4.60%
Realized loss on interest rate swaps reclassified from AOCI into interest expense |  |  |  |  |  |  |  |  | $ 0.6 |  |  |
[1] | Net liability derivatives are located within accrued expenses and other liabilities in our consolidated balance sheets.

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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 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 The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments. + 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 (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: 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 + 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 Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: 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=6943989&loc=d3e3602-108585 + Details
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