Retirement Plans (Components Of Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	May 28, 2017	May 28, 2017	May 29, 2016	May 31, 2015
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	$ 1.1
Interest cost		10.1	10.6	10.0
Expected return on plan assets		(16.0)	(14.5)	(15.2)
Amortization of unrecognized prior service cost		0.0	0.0	0.0
Recognized net actuarial loss		3.3	2.8	2.6
Settlement loss recognized		19.9	0.0	6.1
Net pension and postretirement cost (benefit)		17.3	(1.1)	4.6
Postretirement Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost		0.2	0.2	0.5
Interest cost		0.6	0.8	1.0
Expected return on plan assets		0.0	0.0	0.0
Amortization of unrecognized prior service cost		(4.8)	(4.8)	(2.8)
Recognized net actuarial loss		1.7	1.2	0.8
Settlement loss recognized		0.0	0.0	0.0
Net pension and postretirement cost (benefit)		$ (2.3)	$ (2.6)	$ (0.5)