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PENSION PLANS
 6 Months Ended
Oct. 30, 2011
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]  
PENSION PLANS
PENSION PLANS 
The components of net periodic pension cost consist of:
 
 
Three Months Ended
 
Six Months Ended
 
 
October 30,
2011
 
October 31,
2010
 
October 30,
2011
 
October 31,
2010
 
 
(in millions)
 
(in millions)
Service cost
 
$
9.4

 
$
9.3

 
$
18.7

 
$
18.5

Interest cost
 
19.0

 
18.7

 
38.0

 
37.5

Expected return on plan assets
 
(19.9
)
 
(16.0
)
 
(39.8
)
 
(32.0
)
Net amortization
 
5.8

 
8.5

 
11.7

 
17.0

Net periodic pension cost
 
$
14.3

 
$
20.5

 
$
28.6

 
$
41.0


In June 2011 (fiscal 2012), we made a voluntary contribution of $100.0 million to our qualified pension plans above the minimum amount required under government regulations. As a result of the voluntary contribution, we now expect employer contributions to our qualified pension plans for fiscal 2012 to total approximately $140.0 million.