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BENEFIT PLANS (Tables)
 6 Months Ended
Aug. 04, 2018
Retirement Benefits [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 other loss in the Condensed Consolidated Statements of Operations, for our retirement plans:
 
13 Weeks Ended
 
26 Weeks Ended
millions
August 4,
2018
 
July 29,
2017
 
August 4,
2018
 
July 29,
2017
Components of net periodic expense:
 
 
 
 
 
 
 
Interest cost
$
37

 
$
45

 
$
74

 
$
98

Expected return on plan assets
(41
)
 
(46
)
 
(81
)
 
(103
)
Amortization of experience losses(1)
142

 
247

 
178

 
297

Net periodic expense
$
138

 
$
246

 
$
171

 
$
292


(1) Amortization of the experiences losses for the 13- and 26- weeks ended August 4, 2018 includes $108 million as a result of the lump sum settlement described below. 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.