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Defined Benefit Pension Plans (Tables)
9 Months Ended
Sep. 30, 2020
Retirement Benefits [Abstract]  
Schedule of Defined Benefit Plans Disclosures [Table Text Block] e following table summarizes our net periodic pension cost for our defined benefit pension and postretirement plans during the three and nine months ended September 30, 2020, and 2019:
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2020
 
2019
 
2020
 
2019
Service cost
$

 
$
1

 
$
1

 
$
3

Other components of net periodic pension cost1:
 
 
 
 
 
 
 
Interest cost
2

 
3

 
7

 
9

Expected return on plan assets
(4
)
 
(4
)
 
(11
)
 
(11
)
Amortization of prior service cost
1

 

 
1

 

Amortization of net loss
1

 
1

 
4

 
4

Net periodic pension cost
$

 
$
2

 
$
2

 
$
5

1Other components of net periodic pension cost are included in other non-operating items on our Condensed Consolidated Statements of Income.