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Retirement Plans
 3 Months Ended
Aug. 24, 2014
Compensation and Retirement Disclosure [Abstract]  
Retirement Plans
Retirement Plans
Components of net periodic benefit cost are as follows:
 
 
Defined Benefit Plans
 
 
Three Months Ended
(in millions)
 
August 24,
2014
 
August 25,
2013
Service cost
 
$
0.2

 
$
1.1

Interest cost
 
2.1

 
2.5

Expected return on plan assets
 
(3.1
)
 
(4.3
)
Recognized net actuarial loss
 
0.5

 
2.3

Net periodic benefit cost
 
$
(0.3
)
 
$
1.6

 
 
 
Postretirement Benefit Plan
 
 
Three Months Ended
(in millions)
 
August 24,
2014
 
August 25,
2013
Service cost
 
$
0.2

 
$
0.2

Interest cost
 
0.4

 
0.3

Recognized net actuarial loss
 
0.1

 
—

Net periodic benefit cost
 
$
0.7

 
$
0.5