Consolidated Statements of Changes In Stockholders' Equity (Unaudited) - USD ($) $ in Millions	Total	Common Stock And Surplus	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Unearned Compensation
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 (1.9 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 (10.0 shares)	(502.3)	(102.5)	(399.8)
Issuance of stock under Employee Stock Purchase Plan and other plans (0.2 shares)	5.6	5.6
Ending balance at Feb. 22, 2015	2,237.8	1,338.8	989.0	(7.8)	(77.8)	(4.4)
Beginning balance at May. 31, 2015	2,333.5	1,405.9	1,026.0	(7.8)	(86.6)	(4.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	235.4		235.4			0.0
Other comprehensive income	23.3				23.3
Dividends declared	(204.8)		(204.8)
Stock option exercises (1.9 shares)	75.6	75.6
Stock-based compensation	12.1	12.1
ESOP note receivable repayments	0.6					0.6
Income tax benefits credited to equity	14.5	14.5
Repurchases of common stock (10.0 shares)	(140.2)	(26.5)	(113.7)
Issuance of stock under Employee Stock Purchase Plan and other plans (0.2 shares)	3.6	3.5				0.1
Separation of Four Corners Property Trust	(435.4)		(435.4)
Ending balance at Feb. 28, 2016	$ 1,918.2	$ 1,485.1	$ 507.5	$ (7.8)	$ (63.3)	$ (3.3)