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Fair Value Measurements - Additional Information (Detail) (USD $) In Billions, unless otherwise specified	Nov. 25, 2012	May 27, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying amount of long-term debt	$ 3.6	$ 2.9
Long-term debt at fair value	$ 4.3	$ 3.5

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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