Stock Based Awards (Details 1) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	12 Months Ended
	Feb. 25, 2012 Y	Feb. 26, 2011 Y	Feb. 27, 2010
Stock options granted, exercised and outstanding
Shares Under Option, Granted
Shares Under Option, Exercised
Ending Balance, Weighted Average Remaining Contractual Term, Outstanding	2.62
Ending Balance, Aggregate Intrinsic Value, Outstanding
Shares Under Option, Canceled and forfeited	(3,591)
Ending Balance, Shares Under Option Outstanding	18,413	22,004
Shares Under Option, Vested and expected to vest in future	18,243
Shares Under Option, Exercisable	15,475
Weighted Average Exercise Price, Granted
Weighted Average Exercise Price, Exercised
Weighted Average Exercise Price, Canceled and forfeited	$ 32.06
Ending Balance, Weighted Average Exercise Price , Outstanding	$ 28.90	$ 29.40
Weighted Average Exercise Price, Vested and expected to vest in future	$ 29.04
Weighted Average Exercise Price, Exercisable	$ 31.32
Weighted Average Remaining Contractual Term, Granted
Weighted Average Remaining Contractual Term, Exercised
Weighted Average Remaining Contractual Term, Canceled and forfeited
Beginning Balance, Weighted Average Remaining Contractual Term, Outstanding
Weighted Average Remaining Contractual Term, Vested and expected to vest in future	2.60
Weighted Average Remaining Contractual Term, Exercisable	2.21
Aggregate Intrinsic Value, Granted
Aggregate Intrinsic Value, Exercised		1	1
Aggregate Intrinsic Value, Canceled and forfeited
Beginning Balance, Aggregate Intrinsic Value, Outstanding
Aggregate Intrinsic Value, Vested and expected to vest in future
Aggregate Intrinsic Value, Exercisable