Restructuring, Impairment, and Other Exit Costs (Schedule of restructuring charges classification) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 25, 2018	Nov. 26, 2017	Nov. 25, 2018	Nov. 26, 2017
Restructuring and Related Cost [Line Items]
Restructuring charges (recoveries), impairment, and other exit costs	$ 209.4	$ 2.2	$ 208.2	$ 19.7
Project-related costs classified in cost of sales	0.0	4.2	1.2	5.4
Restructuring, Impairment, and Other Exit Costs [Member]
Restructuring and Related Cost [Line Items]
Restructuring charges (recoveries), impairment, and other exit costs	209.4	1.6	208.0	6.8
Cost of Sales [Member]
Restructuring and Related Cost [Line Items]
Restructuring charges (recoveries), impairment, and other exit costs	$ 0.0	$ 0.6	$ 0.2	$ 12.9