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Pension And Postretirement Benefits (Tables)
 3 Months Ended
Oct. 28, 2018
Retirement Benefits [Abstract]  
Schedule of Net Benefit Costs [Table Text Block]
Components of net benefit expense (income) were as follows:
 
 
Three Months Ended
 
 
Pension
 
Postretirement
 
 
October 28,
2018
 
October 29,
2017
 
October 28,
2018
 
October 29,
2017
Service cost
 
$
5

 
$
6

 
$
—

 
$
—

Interest cost
 
21

 
19

 
2

 
2

Expected return on plan assets
 
(36
)
 
(36
)
 
—

 
—

Amortization of prior service credit
 
—

 
—

 
(7
)
 
(7
)
Net periodic benefit income
 
$
(10
)
 
$
(11
)
 
$
(5
)
 
$
(5
)