Retirement Plans (Components Of Net Periodic Benefit Cost) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Nov. 27, 2011	Nov. 28, 2010	Nov. 27, 2011	Nov. 28, 2010
Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 1.3	$ 1.5	$ 2.7	$ 3.0
Interest cost	2.3	2.4	4.5	4.8
Expected return on plan assets	(4.4)	(4.1)	(8.9)	(8.1)
Recognized net actuarial loss	1.5	1.2	3.1	2.3
Net periodic benefit cost	0.7	1.0	1.4	2.0
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	0.2	0.3	0.4	0.5
Interest cost	0.4	0.6	0.7	1.2
Recognized net actuarial loss	0	0.3	0	0.6
Net periodic benefit cost	$ 0.6	$ 1.2	$ 1.1	$ 2.3