Retirement Benefits - Additional Information (Detail) (USD $)				6 Months Ended		3 Months Ended		6 Months Ended
	Aug. 29, 2014	Feb. 28, 2014	Aug. 30, 2013	Aug. 29, 2014 Profit-Sharing Plan [Member]	Aug. 30, 2013 Profit-Sharing Plan [Member]	Aug. 29, 2014 401 (k) [Member] United States [Member]	Aug. 30, 2013 401 (k) [Member] United States [Member]	Aug. 29, 2014 401 (k) [Member] United States [Member]	Aug. 30, 2013 401 (k) [Member] United States [Member]
Defined Contribution Plan Disclosure [Line Items]
Corporate contributions to the profit-sharing plan				$ 5,500,000	$ 4,500,000
Corporate contributions to the 401(k) employee contribution plan						1,300,000	1,400,000	2,600,000	2,700,000
Liability for postretirement benefits other than pensions	19,700,000	17,900,000	17,600,000
Long-term liability for pension benefits	$ 74,500,000	$ 77,300,000	$ 81,100,000