Amortizable Intangible Assets and Unamortizable Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified							3 Months Ended			3 Months Ended				3 Months Ended
	Jul. 27, 2013	Apr. 27, 2013	Jul. 28, 2012	Jul. 27, 2013 Trade name	Jul. 27, 2013 Publishing contracts	Jul. 27, 2013 Customer relationships and other acquired intangible assets	Jul. 27, 2013 Customer relationships and other acquired intangible assets Minimum	Jul. 27, 2013 Customer relationships and other acquired intangible assets Maximum	Jul. 27, 2013 Technology	Jul. 27, 2013 Technology Minimum	Jul. 27, 2013 Technology Maximum	Jul. 27, 2013 Distribution contracts	Jul. 27, 2013 Other	Jul. 27, 2013 Other Minimum	Jul. 27, 2013 Other Maximum
Intangible Assets by Major Class [Line Items]
Useful Life							5 years	25 years		5 years	10 years	10 years		3 years	10 years
Gross Carrying Amount	$ 297,313					$ 271,938			$ 10,710			$ 8,325	$ 6,340
Accumulated Amortization	(68,458)					(51,498)			(5,061)			(6,481)	(5,418)
Total	228,855					220,440			5,649			1,844	922
Unamortizable intangible assets	314,736			293,400	21,336
Total amortizable and unamortizable, intangible assets	$ 543,591	$ 547,931	$ 562,522