Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	May 31, 2013	May 25, 2012	Feb. 28, 2013
Income Tax Disclosure [Abstract]
Effective tax rate	36.40%	30.40%
Unrecognized tax benefits			$ 21.7
Income tax expenses affected by unrecognized tax benefits if recognized			18.5
Decreased unrecognized tax benefit			3.1
Interest and penalties on unrecognized tax benefits and refundable income taxes	0.2
Accrued Interest and penalties on unrecognized tax benefit	$ 4.7
Open tax years by major tax jurisdiction	The Corporation is subject to examination by the Internal Revenue Service for tax years 2010 to the present and various U.S. state and local jurisdictions for tax years 1996 to the present. The Corporation is also subject to tax examination in various international tax jurisdictions including Australia, Canada, New Zealand and the United Kingdom for tax years 2006 to the present.