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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+ Details

Earnings Per Share - Additional Information (Detail) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Aug. 24, 2012	Aug. 26, 2011	Aug. 24, 2012	Aug. 26, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options excluded from the computation of earnings per share-assuming dilution	3.7	2.5	3.7	2.2
Common Shares - Class A [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise of employee stock options	0	0.2	0.2	0.7
Common Shares - Class B [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise of employee stock options				0.3