Retirement Plans (Funded Status And Amounts Recognized In Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	May 26, 2019	May 27, 2018
Defined Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Current liabilities	$ 0.0	$ 0.0
Noncurrent assets		(16.6)
Noncurrent liabilities	3.5
Net amounts recognized	3.5	(16.6)
Prior service credit	0.0	0.0
Net actuarial gain (loss)	(100.4)	(85.4)
Net amounts recognized	(100.4)	(85.4)
Postretirement Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Current liabilities	1.4	1.4
Noncurrent liabilities	18.4	18.5
Net amounts recognized	19.8	19.9
Prior service credit	3.8	7.4
Net actuarial gain (loss)	(8.7)	(9.6)
Net amounts recognized	$ (4.9)	$ (2.2)