Note 9. Intangible Assets (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
May 04, 2013	Apr. 28, 2012
Amortization of Acquired Intangible Assets	$ 2.7	$ 2.4
Purchased IP Not Yet Deployed	$ 5.9

The aggregate expense charged against earnings to allocate the cost of acquired intangible assets. As a noncash expense, this element is added back to net income when calculating cash provided by (used in) operations using the indirect method.

No definition available.

Name:	us-gaap_AmortizationOfAcquiredIntangibleAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration