Retirement Plans (Funded Status And Amounts Recognized In Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	May 28, 2017	May 29, 2016
Defined Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Current liabilities	$ 0.0	$ 0.0
Noncurrent liabilities	44.6	56.5
Net amounts recognized	44.6	56.5
Prior service credit	0.0	0.0
Net actuarial gain (loss)	(70.1)	(87.9)
Net amounts recognized	(70.1)	(87.9)
Postretirement Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Current liabilities	1.3	1.3
Noncurrent liabilities	19.5	18.6
Net amounts recognized	20.8	19.9
Prior service credit	9.0	11.9
Net actuarial gain (loss)	(9.3)	(9.5)
Net amounts recognized	$ (0.3)	$ 2.4