Consolidated Statements Of Changes In Stockholders' Equity (Unaudited) (USD $) In Millions, unless otherwise specified	Total	Common Stock And Surplus	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Unearned Compensation
Beginning balance 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	4.8				4.8
Dividends declared	(216.2)		(216.2)
Stock option exercises (2015: 2.8 shares and 2014: 1.4 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 (2015: 10.0 shares and 2014: 0.0 shares)	(0.5)	(0.1)	(0.4)
Issuance of stock under Employee Stock Purchase Plan and other plans (0.1 shares in 2015 and 2014)	5.4	5.4
Ending balance at Feb. 23, 2014	2,121.7	1,280.9	982.0	(7.8)	(128.0)	(5.4)
Beginning balance at May. 25, 2014	2,156.9	1,302.2	995.8	(7.8)	(128.1)	(5.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	604.2		604.2
Other comprehensive income	50.3				50.3
Dividends declared	(211.2)		(211.2)
Stock option exercises (2015: 2.8 shares and 2014: 1.4 shares)	103.1	103.1
Stock-based compensation	21.3	21.3
ESOP note receivable repayments	0.8					0.8
Income tax benefits credited to equity	9.1	9.1
Repurchases of common stock (2015: 10.0 shares and 2014: 0.0 shares)	(502.3)	(102.5)	(399.8)
Issuance of stock under Employee Stock Purchase Plan and other plans (0.1 shares in 2015 and 2014)	5.6	5.6
Ending balance at Feb. 22, 2015	$ 2,237.8	$ 1,338.8	$ 989.0	$ (7.8)	$ (77.8)	$ (4.4)