Consolidated Statements of Changes In Stockholders' Equity - USD ($) $ in Millions	Total	Common Stock And Surplus	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Unearned Compensation
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
Other comprehensive income	23.3				23.3
Dividends declared	(204.8)		(204.8)
Stock option exercises (1.5, 1.9 shares)	75.6	75.6
Stock-based compensation	12.1	12.1
Income tax benefits credited to equity	14.5	14.5
Repurchases of common stock (3.5, 2.3 shares)	(140.2)	(26.5)	(113.7)
Issuance of stock under Employee Stock Purchase Plan and other plans (0.1, 0.2) shares)	3.6	3.5				0.1
Separation of Four Corners Property Trust	(435.4)		(435.4)
Other	0.6					0.6
Ending balance at Feb. 28, 2016	1,918.2	1,485.1	507.5	(7.8)	(63.3)	(3.3)
Beginning balance at Nov. 29, 2015					(65.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	105.8
Other comprehensive income	1.7
Ending balance at Feb. 28, 2016	1,918.2	1,485.1	507.5	(7.8)	(63.3)	(3.3)
Beginning balance at May. 29, 2016	1,952.0	1,502.6	547.5	(7.8)	(87.0)	(3.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	355.3		355.3
Other comprehensive income	3.0				3.0
Dividends declared	(208.9)		(208.9)
Stock option exercises (1.5, 1.9 shares)	58.5	58.5
Stock-based compensation	11.4	11.4
Income tax benefits credited to equity	12.1	12.1
Repurchases of common stock (3.5, 2.3 shares)	(214.9)	(41.5)	(173.4)
Issuance of stock under Employee Stock Purchase Plan and other plans (0.1, 0.2) shares)	4.0	3.9				0.1
Other	0.3		(0.5)			0.8
Ending balance at Feb. 26, 2017	1,972.8	1,547.0	520.0	(7.8)	(84.0)	(2.4)
Beginning balance at Nov. 27, 2016					(83.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	165.6
Other comprehensive income	(0.7)
Ending balance at Feb. 26, 2017	$ 1,972.8	$ 1,547.0	$ 520.0	$ (7.8)	$ (84.0)	$ (2.4)