Intangible Assets (Tables)

6 Months Ended

Jul. 27, 2014

Notes to financial statements [Abstract]

Amortizable Intangible Assets Components

	July 27, 2014							January 26, 2014
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	(In thousands)
Acquisition-related intangible assets	$	189,239	$	(124,083	)	$	65,156	$	189,239	$	(114,104	)	$	75,135
Patents and licensed technology	449,204		(253,747		)	195,457		446,196		(225,319		)	220,877
Total intangible assets	$	638,443	$	(377,830	)	$	260,613	$	635,435	$	(339,423	)	$	296,012