Intangible Assets (Tables)

3 Months Ended

Apr. 28, 2013

Notes to financial statements [Abstract]

Amortizable Intangible Assets Components

	April 28, 2013							January 27, 2013
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	(In thousands)
Acquisition-related intangible assets	$	172,039	$	(100,306	)	$	71,733	$	172,039	$	(96,389	)	$	75,650
Patents and licensed technology	448,834		(183,834		)	265,000		407,002		(170,320		)	236,682
Total intangible assets	$	620,873	$	(284,140	)	$	336,733	$	579,041	$	(266,709	)	$	312,332