Acquisition (Narrative) (Details) item in Thousands, $ in Thousands		12 Months Ended
	Mar. 01, 2014 USD ($) item	May 28, 2016 USD ($)	May 30, 2015 USD ($)	May 31, 2014 USD ($)
Business Acquisition [Line Items]
Net income including noncontrolling interests		$ 318,047	$ 162,281	$ 109,807
Delta Egg Farm, LLC [Member]
Business Acquisition [Line Items]
Acquisition date	Mar. 01, 2014
Percentage of voting interest acquired	50.00%
Purchase price	$ 17,000
Previous ownership interest of purchase	50.00%
Non-recurring, non-cash gain for excess purchase price over carrying value				4,000
Reduction in tax expense				(1,500)
Decrease in deferred tax liability				(3,300)
Revenues				4,700
Net income including noncontrolling interests				$ 1,300
Delta, Utah [Member] | Delta Egg Farm, LLC [Member]
Business Acquisition [Line Items]
Number of laying hens | item	1,200
Chase, Kansas [Member] | Delta Egg Farm, LLC [Member]
Business Acquisition [Line Items]
Number of laying hens | item	400