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BENEFIT PLANS (Tables)
 6 Months Ended
Jul. 29, 2017
Defined Benefit Plan [Abstract]  
Summary of Components of Total Net Periodic Benefit Expense for Retirement Plans
The following table summarizes the components of total net periodic benefit expense, recorded within selling and administrative in the Condensed Consolidated Statements of Operations, for our retirement plans:
 
13 Weeks Ended
 
26 Weeks Ended
millions
July 29,
2017
 
July 30,
2016
 
July 29,
2017
 
July 30,
2016
Components of net periodic expense:
 
 
 
 
 
 
 
Interest cost
$
45

 
$
58

 
$
98

 
$
116

Expected return on plan assets
(46
)
 
(51
)
 
(103
)
 
(101
)
Amortization of experience losses(1)
247

 
64

 
297

 
128

Net periodic expense
$
246

 
$
71

 
$
292

 
$
143


(1) Amortization of experience losses for the 13- and 26- weeks ended July 29, 2017 includes $200 million as a result of the pension annuity purchase described below.