Condensed Quarterly Results (Unaudited) - Quarterly Financial Information (Parenthetical) (Detail) (USD $)	0 Months Ended	3 Months Ended			12 Months Ended
	Mar. 13, 2014	Mar. 30, 2014	Jun. 30, 2013	Mar. 31, 2013	Mar. 30, 2014
Schedule Of Quarterly Financial Information [Line Items]
Special charges		$ 56,500,000	$ 12,000,000		$ 74,853,000
Exit costs		10,600,000	9,600,000		26,491,000
Asset impairment charges		4,900,000	2,400,000		7,322,000
Patent license agreement, prior periods	41,000,000	41,000,000			41,040,000
Income tax benefits associated with adjustments to certain tax positions subject to an IRS examination				14,300,000
Retroactive reinstatement of the federal research tax credit				5,000,000
Valuation Allowance, State Tax Credits and Net Operating Loss Carryforwards [Member]
Schedule Of Quarterly Financial Information [Line Items]
Incremental tax charges		$ 14,700,000