Income Taxes (Details 3) (USD $) In Millions, unless otherwise specified	12 Months Ended
Feb. 25, 2012	Feb. 26, 2011	Feb. 27, 2010
Changes in the Company's unrecognized tax benefits
Beginning balance	$ 182	$ 133	$ 114
Increase based on tax positions related to the current year	14	18	7
Decrease based on tax positions related to the current year	(1)	(1)	(4)
Increase based on tax positions related to prior years	21	41	34
Decrease based on tax positions related to prior years	(46)	(9)	(14)
Decrease due to lapse of statute of limitations	(5)		(4)
Ending balance	$ 165	$ 182	$ 133

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The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date.

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