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Stock-Based Incentive Plans (Allocation of Share Based Compensation Costs by Expense Category) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Oct. 18, 2015	Oct. 24, 2014	Oct. 18, 2015	Oct. 24, 2014
Employee Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 15,679,748	$ 2,682,449	$ 18,787,886	$ 6,194,892
Income tax benefit, related to awards, recognized in the consolidated statements of income	(5,019,464)	(972,616)	(5,555,014)	(1,832,434)
Total expense, net of income tax benefit	10,660,284	1,709,833	13,232,872	4,362,458
Cost of goods sold [Member]
Employee Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	930,513	187,103	1,064,251	290,439
Selling, general and administrative [Member]
Employee Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	9,218,626	1,936,262	11,346,514	4,410,334
Research and development [Member]
Employee Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 5,530,609	$ 559,084	$ 6,377,121	$ 1,494,119

X

- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 718



-SubTopic 10



-Section S99



-Paragraph 1



-Subparagraph (SAB TOPIC 14.F)



-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809



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-Name Accounting Standards Codification



-Topic 718



-SubTopic 10



-Section 50



-Paragraph 1



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-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901



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Reference 4: http://www.xbrl.org/2003/role/presentationRef



-Publisher SEC



-Name Staff Accounting Bulletin (SAB)



-Number Topic 14



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- Definition

The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

No definition available.

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No definition available.

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- Definition

The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 718



-SubTopic 10



-Section 50



-Paragraph 2



-Subparagraph (h)(1)(i)



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