Leases (Components of Lease Expenses) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Feb. 23, 2020	Feb. 23, 2020
Operating Leases
Operating lease expense	$ 99.6	$ 296.2
Finance Leases
Amortization of leased assets	2.5	6.1
Interest on lease liabilities	4.2	11.5
Variable lease expense	2.3	5.2
Total lease expense	$ 108.6	$ 319.0