Shareholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended
	Nov. 20, 2015	Oct. 31, 2015	May. 29, 2015
Class of Stock [Line Items]
Common stock authorized for repurchase (in shares)			14,000,000.0
Stock repurchased during the period (in shares)		2,070,000
Stock repurchased during the period, value		$ 68.0
Average price per share (in usd per share)		$ 32.85
Shares with remaining authorization for repurchase under stock repurchase plan (in shares)		10,900,000.0
Subsequent Event [Member]
Class of Stock [Line Items]
Cash dividend declared per common share (in usd per share)	$ 0.170