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Benefit Plans (Details 4)	12 Months Ended
Benefit Plans (Details 4)	Feb. 25, 2012	Feb. 26, 2011	Feb. 27, 2010
Benefit obligation assumptions:
Discount rate	4.55%	5.60%	6.00%
Rate of compensation increase	2.00%	2.00%	3.00%
Net periodic benefit cost assumptions:
Discount rate	5.60%	6.00%	7.35%
Rate of compensation increase	2.00%	3.00%	3.25%
Expected return on plan assets	7.50%	7.75%	8.00%

An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

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