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	278.8		278.8
Other comprehensive income (loss)	(3.7)				(3.7)
Dividends declared	(194.1)	0.4	(194.5)
Stock option exercises (2014: 1.4 shares and 2013: 1.5 shares)	43.9	42.5		1.4
Stock-based compensation	19.0	19.0
ESOP note receivable repayments	0.9					0.9
Income tax benefits credited to equity	10.4	10.4
Repurchases of common stock (1.0 shares)	(52.4)		(0.1)	(52.3)
Issuance of treasury stock under Employee Stock Purchase Plan and other plans (0.2 shares)	5.5	4.8		0.7
Treasury shares retirement (159.3 shares)	0	(1,411.4)	(2,326.1)	3,737.5	0	0
Balances at Feb. 24, 2013	1,950.3	1,184.5	930.9	(8.5)	(150.3)	(6.3)
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	199.7		199.7
Other comprehensive income (loss)	4.8				4.8
Dividends declared	(216.2)		(216.2)
Stock option exercises (2014: 1.4 shares and 2013: 1.5 shares)	38.4	38.1		0.3
Stock-based compensation	20.4	20.4
ESOP note receivable repayments	0.7					0.7
Income tax benefits credited to equity	9.5	9.5
Repurchases of common stock (0.0 shares)	(0.5)	(0.1)	(0.4)
Issuance of treasury stock under Employee Stock Purchase Plan and other plans (0.2 shares)	5.4	5.4
Balances at Feb. 23, 2014	$ 2,121.7	$ 1,280.9	$ 982.0	$ (7.8)	$ (128.0)	$ (5.4)