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PENSION PLANS
3 Months Ended
Jul. 29, 2012
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
 
 
July 29,
2012
 
July 31,
2011
 
 
(in millions)
Service cost
 
$
11.8

 
$
9.3

Interest cost
 
18.7

 
19.0

Expected return on plan assets
 
(19.7
)
 
(19.9
)
Net amortization
 
13.2

 
5.9

Net periodic pension cost
 
$
24.0

 
$
14.3