Employee Benefits Defined Benefit Plan Disclosures (Details) (USD $) In Millions, unless otherwise specified	Aug. 31, 2014	Aug. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation	$ 14	$ 15
Defined Benefit Plan, Funded Status of Plan	4	3
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.05%	4.73%
Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	18	17
Supplemental Employee Retirement Plan, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	3	2
Defined Benefit Plan, Benefit Obligation	4	3
Defined Benefit Plan, Funded Status of Plan	(4)	(3)
Minimum
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months	1
Maximum
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months	$ 3