CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Unearned ESOP Shares	Non-controlling interests
Beginning balance at Apr. 29, 2017	$ 1,394,433	$ 966	$ 72,973	$ (92,669)	$ 1,481,234	$ (68,071)	$ 0
Beginning balance (in shares) at Apr. 29, 2017		96,534
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Foreign currency translation	15,824			15,824
Cash flow hedges	1,871			1,871
Net (loss) income	200,974				200,974
Dividends declared	(96,964)				(96,964)
Common stock issued and related tax benefits	12,407	$ 4	12,403
Common stock issued and related tax benefits (in shares)		369
Repurchases of common stock	(87,500)	$ (22)	0		(87,478)
Repurchase of common stock (in shares)		(2,147)
Stock based compensation	18,400		18,400
ESOP activity	2,345					2,345
Ending balance at Apr. 28, 2018	1,461,790	$ 948	103,776	(74,974)	1,497,766	(65,726)
Ending balance (in shares) at Apr. 28, 2018		94,756
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Foreign currency translation	(15,583)			(15,583)
Cash flow hedges	2,288			2,288
Net (loss) income	82,876				83,628		(752)
Dividends declared	(97,898)				(97,898)
Common stock issued and related tax benefits	8,004	$ 5	7,999
Common stock issued and related tax benefits (in shares)		516
Stock based compensation	19,685		19,685
ESOP activity	15,345					15,345
Increase from asset acquisition	4,000						4,000
Ending balance at Apr. 27, 2019	$ 1,480,507	$ 953	131,460	(88,269)	1,483,496	(50,381)	3,248
Ending balance (in shares) at Apr. 27, 2019	95,947	95,272
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Foreign currency translation	$ (14,062)			(14,062)
Cash flow hedges	7,999			7,999
Net (loss) income	(589,367)				(588,446)		(921)
Dividends declared	(99,552)				(99,552)
Common stock issued and related tax benefits	(7,784)	$ 6	(7,790)
Common stock issued and related tax benefits (in shares)		675
Stock based compensation	22,936		22,936
ESOP activity	34,320					34,320
Adoption of ASU 2018-02 | ASU 2018-02				(2,707)	2,707
Ending balance at Apr. 25, 2020	$ 836,444	$ 959	146,606	(97,039)	799,652	(16,061)	2,327
Ending balance (in shares) at Apr. 25, 2020	95,947	95,947
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of ASU 2016-02 | ASU 2016-02	$ 1,447				1,447
Net (loss) income	(608,797)
Adoption of ASU 2018-02 | ASU 2018-02	2,707
Ending balance at Apr. 25, 2020	$ 836,444	$ 959	$ 146,606	$ (97,039)	$ 799,652	$ (16,061)	$ 2,327
Ending balance (in shares) at Apr. 25, 2020	95,947	95,947