Consolidated Statements Of Changes In Shareholders' Equity (USD $) In Millions, except Share data	Total USD ($)	Restricted Stock Units (RSUs) [Member]	Common Shares Outstanding [Member]	Common Shares Outstanding [Member] Performance Units [Member]	Common Shares Outstanding [Member] Restricted Stock Units (RSUs) [Member]	Class A Common Stock [Member] USD ($)	Class B Common Stock [Member] USD ($)	Additional Paid-In Capital [Member] USD ($)	Accumulated Other Comprehensive Income (Loss) [Member] USD ($)	Retained Earnings [Member] USD ($)
Balance at Feb. 25, 2011	$ 696.3					$ 48.5	$ 0	$ 20.2	$ 0.6	$ 627.0
Balance, shares at Feb. 25, 2011			132,234,568
Common stock issuance	0.3					0.3
Common stock issuance, shares			38,888
Common stock repurchases	(47.7)					(47.7)
Common stock repurchases, shares			(5,802,293)
Tax effect of exercise of stock awards	1.1							1.1
Units issued as common stock, shares					18,166
Performance units and restricted stock units expense	11.3							11.3
Other comprehensive income (loss)	0.2								0.2
Dividends paid	(31.7)									(31.7)
Net income	56.7									56.7
Balance at Feb. 24, 2012	686.5					1.1	0	32.6	0.8	652.0
Balance, shares at Feb. 24, 2012	126,500,000		126,489,329
Common stock issuance	0.3							0.3
Common stock issuance, shares			43,238
Common stock repurchases	(19.9)					(1.1)		(18.8)
Common stock repurchases, shares	(2,300,000)		(2,346,590)
Tax effect of exercise of stock awards	3.8							3.8
Units issued as common stock, shares				763,425	215,185
Performance units and restricted stock units expense	9.3							9.3
Other comprehensive income (loss)	(5.0)								(5.0)
Dividends paid	(45.8)									(45.8)
Net income	38.8									38.8
Balance at Feb. 22, 2013	668.0					0	0	27.2	(4.2)	645.0
Balance, shares at Feb. 22, 2013	125,200,000		125,164,587
Common stock issuance	0.5							0.5
Common stock issuance, shares			31,790
Common stock repurchases	(49.9)							(43.7)		(6.2)
Common stock repurchases, shares	(3,600,000)		(3,619,817)
Tax effect of exercise of stock awards	0.5							0.5
Units issued as common stock, shares		266,704		1,018,500	281,704
Performance units and restricted stock units expense	16.3							16.3
Common stock repurchases related to vested but not issued	(0.8)							(0.8)
Other comprehensive income (loss)	5.0								5.0
Dividends paid	(50.2)									(50.2)
Net income	87.7									87.7
Balance at Feb. 28, 2014	$ 677.1					$ 0	$ 0	$ 0	$ 0.8	$ 676.3
Balance, shares at Feb. 28, 2014	122,900,000		122,876,764