Income Taxes (Details 2) (USD $) In Millions, unless otherwise specified	Feb. 25, 2012	Feb. 26, 2011
Deferred tax assets:
Compensation and benefits	$ 531	$ 435
Self-insurance	217	241
Deferred Tax Assets Property Plant and Equipment	437	452
Net operating loss carryforward	39	38
Other	222	163
Gross deferred tax assets	1,446	1,329
Valuation allowance	(25)	(24)
Total deferred tax assets	1,421	1,305
Deferred tax liabilities:
Property, plant and equipment and capitalized lease assets	(356)	(345)
Inventories	(253)	(267)
Debt discount	(75)	(78)
Intangible assets	(223)	(342)
Other	(31)	(26)
Total deferred tax liabilities	(938)	(1,058)
Net deferred tax asset	$ 483	$ 247