CONSOLIDATED STATEMENTS OF INCOME AND OTHER COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Apr. 30, 2016	Apr. 25, 2015	Apr. 26, 2014
Income Statement [Abstract]
Net sales	$ 5,386,703	$ 3,910,865	$ 3,585,141
Cost of sales	4,063,955	2,850,316	2,566,444
Gross profit	1,322,748	1,060,549	1,018,697
Operating expenses	975,035	755,963	724,971
Operating income from continuing operations	347,713	304,586	293,726
Other income (expense):
Other income, net	4,045	3,425	3,250
Interest expense	(50,065)	(33,693)	(35,713)
Income from continuing operations before taxes	301,693	274,318	261,263
Income tax expense	116,009	94,235	89,931
Net income from continuing operations	185,684	180,083	171,332
Net income from discontinued operations	1,500	43,178	29,280
Net income	$ 187,184	$ 223,261	$ 200,612
Basic earnings per share:
Continuing operations (in usd per share)	$ 1.91	$ 1.82	$ 1.70
Discontinued operations (in usd per share)	0.02	0.44	0.29
Basic (in usd per share)	1.93	2.26	1.99
Diluted earnings per share:
Continuing operations (in usd per share)	1.90	1.81	1.69
Discontinued operations (in usd per share)	0.01	0.43	0.28
Diluted (in usd per share)	$ 1.91	$ 2.24	$ 1.97
Weighted average shares:
Basic (in shares)	97,222	98,989	100,727
Diluted (in shares)	97,902	99,694	101,643
Dividends declared per common share (in usd per share)	$ 0.9	$ 0.82	$ 0.68
Comprehensive income
Net income	$ 187,184	$ 223,261	$ 200,612
Foreign currency translation gain (loss)	(9,552)	(73,271)	6,059
Cash flow hedges, net of tax	1,934	(12,445)	(5,854)
Comprehensive income	$ 179,566	$ 137,545	$ 200,817