Fair Value Measurements (Carrying Value And Fair Value Of Long-Term Debt) (Details) - USD ($) $ in Millions	12 Months Ended
	May. 31, 2015	Aug. 30, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying value of long-term debt	$ 1,470.0	$ 1,450.0
Fair value of long-term debt	1,570.0	$ 1,560.0
Impairment of long-lived assets held-for-use	55.4
Impairment of long-lived assets held-for-use, sale-leaseback assets	15.1
Fair value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Nonfinancial assets fair value disclosure	$ 70.5