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Equity Compensation Plans (Details) (USD $) In Millions, except Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011
Grant Date Fair Value of Outstanding Class B Units: |  |  |  |
Equity compensation expense | $ 20 | $ 27 | $ 60 | $ 46
AAP LP Class B Units |  |  |  |
Reserved for Future Grants |  |  |  |
Reserved for future grants outstanding, beginning balance (in units) |  |  | 16,500 |
Unit forfeitures (in units) |  |  | 1,000 |
Reserved for future grants outstanding, ending balance (in units) | 17,500 |  | 17,500 |
Outstanding |  |  |  |
Outstanding at the beginning of the period (in units) |  |  | 183,500 |
Unit forfeitures (in units) |  |  | (1,000) |
Outstanding at the ending of the period (in units) | 182,500 |  | 182,500 |
Outstanding Units Earned |  |  |  |
Outstanding Units Earned, beginning balance (in units) |  |  | 80,063 |
Units earned (in units) |  |  | 24,250 |
Outstanding Units Earned, end balance (in units) | 104,313 |  | 104,313 |
Grant Date Fair Value of Outstanding Class B Units: |  |  |  |
Grant Date Fair Value of Outstanding Class B Units, beginning balance |  |  | 44 |
Grant Date Fair Value of Outstanding Class B Units, ending balance | 44 |  | 44 |
Equity compensation expense |  |  | $ 5 |

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- Definition The number of shares outstanding/issued under a share-based award plan which have become earned during the reporting period as certain performance conditions have been met giving the grantee the right to receive quarterly distributions. + References No definition available. + Details
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- Definition The number of outstanding awards on non-stock option plans for which the employer has issued equity instruments to an employee, including both employees who have and who have not yet satisfied service or performance criteria necessary to gain title to distributions to the shares. + References No definition available. + Details
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- Definition The number of outstanding awards on non-stock option plans for which the employer has issued equity instruments to an employee and the units issued have been earned as required performance conditions have been met, giving the employee the right to receive quarterly distributions. + References No definition available. + Details
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph g(1) -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 Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -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 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=6793087&loc=d3e301413-122809 + Details
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