Risk Management Activities (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended
	Feb. 27, 2022	Feb. 28, 2021
Credit Risk [Abstract]
Accounts Payable to Suppliers that Utilize Third Party Service	$ 1,382.8	$ 1,420.3
Commodity Contracts [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 634.1
Derivative Contracts Inputs, Average Period of Utilization	12 months
Energy Related Derivative [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 147.7
Agricultural Related Derivative [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 486.4