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Earnings Per Share - Additional Information (Detail) In Millions, unless otherwise specified	3 Months Ended
	May 31, 2013	May 25, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amount of stock options excluded from earnings per share	3.2	3.7
Common shares Class A [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise of employee stock options	0.3	0.1

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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