CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Unearned ESOP Shares [Member]
Beginning Balance at Apr. 26, 2014	$ 1,471,664	$ 1,040	$ 0	$ 25,370	$ 1,531,198	$ (85,944)
Beginning balance (in shares) at Apr. 26, 2014		103,965
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Foreign currency translation	(73,271)			(73,271)
Cash flow hedges	(12,445)			(12,445)
Net income	223,261				223,261
Dividends declared	(82,531)				(82,531)
Common stock issued and related tax benefits	11,336	$ 5	11,331
Common stock issued and related tax benefits (in shares)		507
Repurchase of common stock	(47,539)	$ (12)	(5,747)		(41,780)
Repurchase of common stock (in shares)		(1,194)
Stock based compensation	15,442		15,442
ESOP activity	8,206					8,206
Ending Balance at Apr. 25, 2015	1,514,123	$ 1,033	21,026	(60,346)	1,630,148	(77,738)
Ending balance (in shares) at Apr. 25, 2015		103,278
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Foreign currency translation	(9,552)			(9,552)
Cash flow hedges	1,934			1,934
Net income	187,184				187,184
Dividends declared	(88,218)				(88,218)
Common stock issued and related tax benefits	12,877	$ 2	12,875
Common stock issued and related tax benefits (in shares)		208
Repurchase of common stock	(200,000)	$ (44)			(199,956)
Repurchase of common stock (in shares)		(4,379)
Stock based compensation	14,576		14,576
ESOP activity	8,822					8,822
Ending Balance at Apr. 30, 2016	$ 1,441,746	$ 991	48,477	(67,964)	1,529,158	(68,916)
Ending balance (in shares) at Apr. 30, 2016	99,107	99,107
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Foreign currency translation	$ (26,450)			(26,450)
Cash flow hedges	1,745			1,745
Net income	170,893				170,893
Dividends declared	(93,461)				(93,461)
Common stock issued and related tax benefits	6,789	$ 3	6,786
Common stock issued and related tax benefits (in shares)		282
Repurchase of common stock	(125,384)	$ (28)			(125,356)
Repurchase of common stock (in shares)		(2,855)
Stock based compensation	17,710		17,710
ESOP activity	845					845
Ending Balance at Apr. 29, 2017	$ 1,394,433	$ 966	$ 72,973	$ (92,669)	$ 1,481,234	$ (68,071)
Ending balance (in shares) at Apr. 29, 2017	96,534	96,534