Maturities of Available for Sale and Held to Maturity Securities (Detail) (USD $) In Millions, unless otherwise specified	May 06, 2012
Available-For-Sale, Cost Basis
Available-For-Sale, Cost Basis due in one year or less	$ 785
Available-For-Sale, Cost Basis due after one year through five years	288
Available-For-Sale, Cost Basis due after five years	1
Available-For-Sale, Cost Basis, total	1,074
Available-For-Sale, Fair Value
Available-For-Sale, Fair Value due in one year or less	786
Available-For-Sale, Fair Value due after one year through five years	294
Available-For-Sale, Fair Value due after five years	1
Available-For-Sale, Fair Value, total	1,081
Held-To-Maturity, Cost Basis
Held-To-Maturity, Cost Basis due in one year or less	104
Held-To-Maturity, Cost Basis due after one year through five years	0
Held-To-Maturity, Cost Basis due after five years	0
Held-To-Maturity, Cost Basis, total	104
Held-To-Maturity, Fair Value
Held-To-Maturity, Fair Value due in one year or less	104
Held-To-Maturity, Fair Value due after one year through five years	0
Held-To-Maturity, Fair Value due after five years	0
Held-To-Maturity, Fair Value, total	$ 104