CONSOLIDATED STATEMENTS OF INCOME AND OTHER COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Apr. 28, 2018	Apr. 29, 2017	Apr. 30, 2016
Income Statement [Abstract]
Net sales	$ 5,465,683	$ 5,593,127	$ 5,386,703
Cost of sales	4,266,317	4,291,730	4,063,955
Gross profit	1,199,366	1,301,397	1,322,748
Operating expenses	979,477	1,013,469	975,035
Operating income from continuing operations	219,889	287,928	347,713
Other income (expense):
Other income, net	6,117	6,013	4,045
Interest expense	(46,743)	(43,060)	(50,065)
Income from continuing operations before taxes	179,263	250,881	301,693
Income tax expense (benefit)	(21,711)	77,093	116,009
Net income from continuing operations	200,974	173,788	185,684
Net income (loss) from discontinued operations	0	(2,895)	1,500
Net income	$ 200,974	$ 170,893	$ 187,184
Basic earnings (loss) per share:
Continuing operations (in usd per share)	$ 2.17	$ 1.83	$ 1.91
Discontinued operations (in usd per share)	0.00	(0.03)	0.02
Basic (in usd per share)	2.17	1.80	1.93
Diluted earnings (loss) per share:
Continuing operations (in usd per share)	2.16	1.82	1.90
Discontinued operations (in usd per share)	0.00	(0.03)	0.01
Diluted (in usd per share)	$ 2.16	$ 1.79	$ 1.91
Weighted average shares:
Basic (in shares)	92,467	94,897	97,222
Diluted (in shares)	93,094	95,567	97,902
Dividends declared per common share (in usd per share)	$ 1.04	$ 0.98	$ 0.9
Comprehensive income
Net income	$ 200,974	$ 170,893	$ 187,184
Foreign currency translation gain (loss)	15,824	(26,450)	(9,552)
Cash flow hedges, net of tax	1,871	1,745	1,934
Comprehensive income	$ 218,669	$ 146,188	$ 179,566