v2.4.0.6

Financial Instruments and Fair Value - Contractual Maturities of Debt Investments (Detail) (USD $) In Millions, unless otherwise specified	Oct. 26, 2012
Schedule of Available-for-sale Securities [Line Items]
Due in one year or less, Amortized Cost	$ 1,586.3
Due in one through five years, Amortized Cost	2,152.9
Due after ten years, Amortized Cost	49.1	[1]
Total, Amortized Cost	3,788.3
Due in one year or less, Fair Value	1,589.3
Due in one through five years, Fair Value	2,164.9
Due after ten years, Fair Value	46.5	[1]
Total, Fair Value	$ 3,800.7
[1] Consists of auction rate securities which have contractual maturities of greater than 10 years.

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