Equity-Indexed Compensation Plans (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended			86 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 AAP Management Units	Sep. 30, 2014 AAP Management Units
Reserved for Future Grants
Reserved for future grants, beginning balance (in units)					3.5
Granted (in units)					(0.4)
Reserved for future grants, ending balance (in units)					3.1	3.1
Outstanding
Outstanding at the beginning of the period (in units)					48.6
Granted (in units)					0.4
Outstanding at the ending of the period (in units)					49.0	49.0
Outstanding Units Earned
Outstanding Units Earned, beginning balance (in units)					47.0
Earned (in units)					0.8
Outstanding Units Earned, end balance (in units)					47.8	47.8
Grant Date Fair Value of Outstanding AAP Management Units:
Grant Date Fair Value of Outstanding AAP Management Units, beginning balance					$ 51
Granted					11
Grant Date Fair Value of Outstanding AAP Management Units, ending balance					62	62
Equity-indexed compensation expense	$ 22	$ 17	$ 91	$ 96	$ 5	$ 54