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Financial Instruments Measured at Fair Value - Short-Term Investments by Security Type (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	Mar. 30, 2013	Dec. 29, 2012
Investments Debt And Equity Securities [Abstract]
Amortized cost of investments with loss positions	$ 0
Fair value of investments with loss positions		$ 0

- Definition

This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities.

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