Note 11 - Capital Stock (Details Textual) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	May 29, 2022	May 30, 2021
Common Stock And Preferred Stock Shares, Authorized (in shares)	1,218,050,000
Common Stock, Shares Authorized (in shares)	1,200,000,000	1,200,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 5	$ 5
Preferred Stock, Shares Outstanding, Ending Balance (in shares)	0
Series B Preferred Stock [Member]
Preferred Stock, Shares Authorized (in shares)	150,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 50.00
Series C Preferred Stock [Member]
Preferred Stock, Shares Authorized (in shares)	250,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 100.00
Series D Preferred Stock [Member]
Preferred Stock, Shares Authorized (in shares)	1,100,000
Series E Preferred Stock [Member]
Preferred Stock, Shares Authorized (in shares)	16,550,000
Common Stock [Member]
Stock Repurchased During Period, Shares (in shares)	1,500,000	8,800,000
Stock Repurchased During Period, Value	$ 50.0	$ 298.1