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RETIREMENT AND BENEFIT PLANS (Tables)
 6 Months Ended
Aug. 05, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Schedule of Net Benefit Costs [Table Text Block]
 
Pension Plans
 
Pension Plans
 
Thirteen Weeks Ended
 
Twenty-Six Weeks Ended
(In millions)
8/5/18
 
7/30/17
 
8/5/18
 
7/30/17
 
 
 
 
 
 
 
 
Service cost, including plan expenses    
$
8.6

 
$
6.7

 
$
16.9

 
$
13.6

Interest cost    
6.5

 
6.5

 
13.0

 
12.9

Expected return on plan assets    
(10.1
)
 
(9.6
)
 
(20.1
)
 
(19.3
)
Settlement loss
—

 
—

 
—

 
9.4

Curtailment gain
—

 
(0.3
)
 
—

 
(0.3
)
Total    
$
5.0

 
$
3.3

 
$
9.8

 
$
16.3



 
SERP Plans
 
SERP Plans
 
Thirteen Weeks Ended
 
Twenty-Six Weeks Ended
(In millions)
8/5/18
 
7/30/17
 
8/5/18
 
7/30/17
 
 
 
 
 
 
 
 
Service cost, including plan expenses    
$
1.6

 
$
1.1

 
$
2.9

 
$
2.3

Interest cost    
1.0

 
0.9

 
2.0

 
1.9

Total    
$
2.6

 
$
2.0

 
$
4.9

 
$
4.2


Net benefit cost related to the Postretirement Plans was immaterial for the thirteen and twenty-six weeks ended August 5, 2018 and July 30, 2017.