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Inventory, Linefill, Base Gas and Long-term Inventory (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Inventory-related disclosures |  |  |
Gain on sale of linefill | $ 19 | $ 21 | $ 21
Proceeds from sale of pipeline linefill | 65 | 56 | 72
Non-cash charges related to the write-down of inventory | 128 | 4 | 3
Ratio of Mcf of natural gas to crude Btu | 6 | 6 |
Inventory by category |  |  |
Inventory | 1,209 | 978 |
Linefill and base gas | 707 | 564 |
Long-term inventory | 274 | 135 |
Total | 2,190 | 1,677 |
Crude oil |  |  |
Inventory by category |  |  |
Inventory | 737 | 483 |
Linefill and base gas | 583 | 514 |
Long-term inventory | 149 | 127 |
Inventory, Volumes (in barrels or in Mcf) | 9,492,000 | 5,361,000 |
Linefill and base gas, Volumes (in barrels or in Mcf) | 9,919,000 | 9,366,000 |
Long-term inventory, Volumes (in barrels or Mcf) | 1,962,000 | 1,714,000 |
Inventory, Price/Unit of measure (in dollars per unit) | 77.64 | 90.10 |
Linefill and base gas, Price/Unit of measure (in dollars per unit) | 58.78 | 54.88 |
Long-term inventory, Price/Unit of measure (in dollars per unit) | 75.94 | 74.10 |
NGL |  |  |
Inventory by category |  |  |
Inventory | 388 | 438 |
Linefill and base gas | 70 | 2 |
Long-term inventory | 125 | 8 |
Inventory, Volumes (in barrels or in Mcf) | 9,472,000 | 6,885,000 |
Linefill and base gas, Volumes (in barrels or in Mcf) | 1,400,000 | 31,000 |
Long-term inventory, Volumes (in barrels or Mcf) | 3,238,000 | 150,000 |
Inventory, Price/Unit of measure (in dollars per unit) | 40.96 | 63.62 |
Linefill and base gas, Price/Unit of measure (in dollars per unit) | 50.00 | 64.52 |
Long-term inventory, Price/Unit of measure (in dollars per unit) | 38.60 | 53.33 |
Natural gas |  |  |
Inventory-related disclosures |  |  |
Number used to divide into natural gas volumes to convert to barrels | 6 |  |
Inventory by category |  |  |
Inventory | 60 | 51 |
Linefill and base gas | 54 | 48 |
Inventory, Volumes (in barrels or in Mcf) | 20,374,000 | 16,170,000 |
Linefill and base gas, Volumes (in barrels or in Mcf) | 15,755,000 | 14,105,000 |
Inventory, Price/Unit of measure (in dollars per unit) | 2.94 | 3.15 |
Linefill and base gas, Price/Unit of measure (in dollars per unit) | 3.43 | 3.40 |
Other |  |  |
Inventory by category |  |  |
Inventory | $ 24 | $ 6 |

X
- Definition Represents the number to be divided into the amount in cubic feet of natural gas volumes in order to convert the volumes to barrels. + References No definition available. + Details
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- Definition The difference between the sale price and book value of linefill that was sold during the reporting period. + References No definition available. + Details
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- Details
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- Definition This element represents the aggregate of current and non-current inventory. + References No definition available. + Details
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- Details
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- Definition The volume of current inventory as of the balance sheet date. + References No definition available. + Details
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- Definition The volume of linefill and base gas inventory as of the balance sheet date. + References No definition available. + Details
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- Definition The volume of noncurrent inventory as of the balance sheet date. + References No definition available. + Details
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- Definition The weighted-average price per unit of current inventory. + References No definition available. + Details
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- Definition The weighted-average price per unit of linefill and base gas inventory. + References No definition available. + Details
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- Definition Crude oil, refined products, and NGL linefill and base gas in pipelines and natural gas storage facilities that are owned by the entity. The linefill and base gas are intended for long-term use. + References No definition available. + Details
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- Definition Represents the minimum ratio of Mcf of natural gas to crude Btu. + References No definition available. + Details
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- Definition This element represents the cash inflow that is associated with sale of linefill during the reporting period. + References No definition available. + Details
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- Definition Carrying amount (lower of cost or market) as of the balance sheet date of inventories less all valuation and other allowances. Excludes noncurrent inventory balances (expected to remain on hand past one year or one operating cycle, if longer). + 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 210.5-02.6(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6386567&loc=d3e3927-108312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e6676-107765 + Details
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- Definition Inventories not expected to be converted to cash, sold or exchanged within the normal operating cycle. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Section A -Paragraph 4, 5 -Chapter 3 -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 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(d)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 6 -Subparagraph d -Article 5 + Details
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- Definition Charge to cost of goods sold that represents the reduction of the carrying amount of inventory, generally attributable to obsolescence or market conditions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Concepts (CON) -Number 6 -Paragraph 86 -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 AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Section 7 -Paragraph 14 -Chapter 4 -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 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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6386783&loc=d3e4542-108314 + Details
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