v2.4.0.6

Financial Instruments And Fair Value (Contractual Maturities Of Available-For-Sale Securities) (Details) (USD $) In Millions, unless otherwise specified	Jan. 27, 2012
Financial Instruments And Fair Value [Abstract]
Due in one year or less, Cost	$ 821.6
Due in one year or less, Fair Value	823.6
Due in one through five years, Cost	1,672.0
Due in one through five years, Fair Value	1,675.8
Due after ten years, Cost	54.4	[1]
Due after ten years, Fair Value	51.0	[1]
Total, Cost	2,548.0
Total, Fair Value	$ 2,550.4
[1] Consists of auction rate securities which have contractual maturities of greater than 10 years.

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This item represents debt securities, at cost, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments, as defined), and fair value hedge accounting adjustments, if any, which are expected to mature after one year and through five years from the balance sheet date and which are categorized neither as held-to-maturity nor trading securities.

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