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Commitments and Contingencies (Details 3) (USD $) In Millions, unless otherwise specified | 6 Months Ended |
--- | --- | ---
Jun. 30, 2011 Y D bbl Segments InterestRateSwaps | Dec. 31, 2010
Environmental |  |
Estimated environmental reserve | $ 122 | $ 66
Reserve for environmental liabilities, short-term | 64 | 10
Reserve for environmental liabilities, long-term | 58 | 56
Probable recoveries from insurers and third parties recorded as a receivable | 64 | 5
Actual cash expenditures for environmental liabilities, period paid, low end of range (in years) | 3 |
Actual cash expenditures for environmental liabilities, period paid, high end of range (in years) | 5 |
Insurance |  |
Premium and deductible as a percentage of coverage limit (as a percent) | 20.00% |
Number of years over which hurricane limit insurance is purchased (in years) | 2 |
Hurricane property and business interruption insurance limit | $ 10 |

X
- Definition The high end of the range of the estimated period of time when actual cash expenditures are made for environmental liabilities, as stated in years. + Details
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- Definition The low end of the range of the estimated period of time when actual cash expenditures are made for environmental liabilities, as stated in years. + Details
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- Definition Amount of insurance to cover property and business interruption losses associated with hurricane damage. + Details
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- Definition Represents number of years over which hurricane limit insurance is purchased which covers property and business interruption. + Details
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- Definition Total costs accrued as of the balance sheet date for environmental loss contingencies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 96-1 -Paragraph 161 -Subparagraph a Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 9 + Details
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- Definition Carrying value of the obligation (known or estimated) arising from requirements to perform activities to remediate one or more sites, payable in twelve months or in the next operating cycle if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 96-1 -Paragraph 161, 163 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Chapter 3 -Section A -Paragraph 8 + Details
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- Definition Carrying amount as of the balance sheet date of known and reasonably estimable amounts of recoveries from third-parties pertaining to an entity's environmental remediation obligations. An entity's balance sheet may include several assets that relate to an environmental remediation obligation. Among them are the following: a. Receivables from other potentially responsible parties that are not providing initial funding; b. anticipated recoveries from insurers; and c. anticipated recoveries from prior owners as a result of indemnification agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 96-1 -Paragraph 161 + Details
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