Restructuring, Impairment, and Other Exit Costs (Schedule of restructuring charges classification) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 23, 2020	Feb. 24, 2019	Feb. 23, 2020	Feb. 24, 2019
Restructuring and Related Cost [Line Items]
Restructuring charges (recoveries), impairment, and other exit costs	$ 12.4	$ 59.8	$ 37.2	$ 268.0
Project-related costs classified in cost of sales	0.4	0.1	1.1	1.3
Cost of Sales [Member]
Restructuring and Related Cost [Line Items]
Restructuring charges (recoveries), impairment, and other exit costs	6.6	0.1	24.3	0.3
Restructuring, Impairment, and Other Exit Costs [Member]
Restructuring and Related Cost [Line Items]
Restructuring charges (recoveries), impairment, and other exit costs	$ 5.8	$ 59.7	$ 12.9	$ 267.7