Consolidated Statements Of Changes In Stockholders' Equity (USD $) In Millions, unless otherwise specified	Total	Common Stock And Surplus	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Unearned Compensation
Balances at May. 27, 2012	$ 1,842.0	$ 2,518.8	$ 3,172.8	$ (3,695.8)	$ (146.6)	$ (7.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	110.8		110.8
Other comprehensive income (loss)	(1.2)				(1.2)
Dividends declared	(64.5)		(64.5)
Stock option exercises	12.7	12.2		0.5
Stock-based compensation	5.9	5.9
ESOP note receivable repayments	0.5					0.5
Income tax benefits credited to equity	4.0	4.0
Repurchases of common stock	(52.2)			(52.2)
Issuance of treasury stock under Employee Stock Purchase Plan and other plans	2.0	1.6		0.3		0.1
Balances at Aug. 26, 2012	1,860.0	2,542.5	3,219.1	(3,747.2)	(147.8)	(6.6)
Balances at May. 26, 2013	2,059.5	1,207.6	998.9	(8.1)	(132.8)	(6.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	70.2		70.2
Other comprehensive income (loss)	(1.6)				(1.6)
Dividends declared	(72.0)		(72.0)
Stock option exercises	6.4	6.2		0.2
Stock-based compensation	5.7	5.7
ESOP note receivable repayments	0.3					0.3
Income tax benefits credited to equity	1.6	1.6
Repurchases of common stock	(0.4)	(0.1)	(0.3)
Issuance of treasury stock under Employee Stock Purchase Plan and other plans	1.8	1.8
Balances at Aug. 25, 2013	$ 2,071.5	$ 1,222.8	$ 996.8	$ (7.9)	$ (134.4)	$ (5.8)