Income Taxes Additional Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended	9 Months Ended			12 Months Ended
	May 11, 2014	May 12, 2013	Feb. 16, 2014	May 11, 2014	May 12, 2013	May 12, 2013 Special Dividend [Member]	Aug. 31, 2014 Scenario, Forecast [Member]
Income Taxes [Line Items]
Effective Income Tax Rate Reconciliation, Percent	33.90%	34.80%		34.50%	31.40%		34.80%
Estimated Annual Effective Tax Rate		34.80%	35.20%		34.80%
Discrete Income Tax Benefit					$ 72	$ 62