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Fair Value Measurements (Carrying Value And Fair Value Of Long-Term Debt) (Details) (USD $) In Billions, unless otherwise specified	Aug. 26, 2012	May 27, 2012
Fair Value Disclosures [Abstract]
Carrying value of long-term debt	$ 1.80	$ 1.80
Fair value of long-term debt	$ 2.00	$ 1.99

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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