Additional Financial Information (Components of Interest) (Details) - USD ($) $ in Millions	12 Months Ended
	May 28, 2017	May 29, 2016	May 31, 2015
Debt Instruments [Line Items]
Interest expense	$ 34.4	$ 165.4	$ 186.2
Imputed interest on capital and financing leases	8.8	8.9	8.0
Capitalized interest	(1.7)	(0.7)	(1.3)
Interest income	(1.3)	(1.1)	(0.6)
Interest, net	$ 40.2	172.5	192.3
Long-term Debt
Debt Instruments [Line Items]
Interest expense		$ 106.8	$ 91.3