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Equity-Indexed Compensation Plans (Details 2) - USD ($) shares in Millions, $ in Millions | 3 Months Ended | 9 Months Ended | 98 Months Ended
--- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015
Grant Date Fair Value of Outstanding AAP Management Units |  |  |  |
Equity-indexed compensation expense | $ 22 | $ 27 | $ 90 |
AAP Management Units |  |  |  |
Reserved for Future Grants |  |  |  |
Reserved for future grants, beginning balance (in units) |  | 3.0 |  |
Granted (in units) |  | (1.6) |  |
Reserved for future grants, ending balance (in units) |  | 1.4 |  | 1.4
Outstanding |  |  |  |
Outstanding, beginning balance (in units) |  | 49.1 |  |
Granted (in units) |  | 1.6 |  |
Outstanding, ending balance (in units) |  | 50.7 |  | 50.7
Outstanding Units Earned |  |  |  |
Outstanding Units Earned, beginning balance (in units) |  | 47.8 |  |
Earned (in units) |  | 0.7 |  |
Outstanding Units Earned, ending balance (in units) |  | 48.5 |  | 48.5
Grant Date Fair Value of Outstanding AAP Management Units |  |  |  |
Grant Date Fair Value of Outstanding AAP Management Units, beginning balance |  | $ 64 |  |
Granted |  | 24 |  |
Grant Date Fair Value of Outstanding AAP Management Units, ending balance |  | 88 |  | $ 88
Equity-indexed compensation expense |  | $ 1 |  | $ 57

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