Retirement Plans (Components Of Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions	12 Months Ended
	May 26, 2019	May 27, 2018	May 28, 2017
Defined Benefit Plan Disclosure [Line Items]
Settlement loss recognized			$ 19.9
Defined Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0.0	$ 0.0	0.0
Interest cost	9.3	8.6	10.1
Expected return on plan assets	(11.2)	(12.0)	(16.0)
Amortization of unrecognized prior service cost	0.0	0.0	0.0
Recognized net actuarial loss	2.5	2.8	3.3
Settlement loss recognized	0.0	0.0	19.9
Net pension and postretirement cost (benefit)	0.6	(0.6)	17.3
Postretirement Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.1	0.1	0.2
Interest cost	0.8	0.7	0.6
Expected return on plan assets	0.0	0.0	0.0
Amortization of unrecognized prior service cost	(4.8)	(4.8)	(4.8)
Recognized net actuarial loss	1.5	1.7	1.7
Settlement loss recognized	0.0	0.0	0.0
Net pension and postretirement cost (benefit)	$ (2.4)	$ (2.3)	$ (2.3)