Fair Values of Financial Assets and Liabilities (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	Mar. 23, 2013		Mar. 24, 2012
Derivatives, Fair Value [Line Items]
Deferred compensation, Liabilities	$ 502	[1],[2]	$ 523	[1],[2]
Level 1 Fair Values Of Assets And Liabilities
Derivatives, Fair Value [Line Items]
Deferred compensation, Liabilities	$ 9		$ 49

[1] Based on the fair value of investments corresponding to employees’ investment elections. As of March 23, 2013 and March 24, 2012, $9 million and $49 million, respectively, are categorized as Level 1 liabilities. The remaining balances are categorized as Level 2 liabilities.

[2] Financial assets are classified on our balance sheet within prepaid expenses and other current assets, and other assets, with the exception of available-for-sale securities and short-term investments, which are classified as short-term investments. Financial liabilities are classified on our balance sheet within accounts payable and other current liabilities and other liabilities. Unless specifically indicated, all financial assets and liabilities are categorized as Level 2 assets or liabilities.