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Retirement Benefits (Tables)
 6 Months Ended
Jun. 30, 2020
Defined Benefit Plan [Abstract]  
Components of Net Periodic (Benefit Credit) Benefit Cost
The components of net periodic benefit credit included in our consolidated statements of income for the three months ended June 30, 2020 and 2019 are as follows:
 
Pension Benefits
 
Other Benefits
 
Three Months Ended 
 June 30
 
Three Months Ended 
 June 30
 
2020
 
2019
 
2020
 
2019
Interest cost
$
13

 
$
16

 
$
2

 
$
4

Expected return on assets
(29
)
 
(35
)
 
(6
)
 
(6
)
Recognized actuarial loss
6

 
4

 
—

 
1

Settlement loss
10

 
2

 
—

 
—

Amortization of prior service credit
—

 
—

 
(2
)
 
(3
)
Net periodic benefit credit
$
—

 
$
(13
)
 
$
(6
)
 
$
(4
)
The components of net periodic benefit credit included in our consolidated statements of income for the six months ended June 30, 2020 and 2019 are as follows:
 
Pension Benefits
 
Other Benefits
 
Six Months Ended 
 June 30
 
Six Months Ended 
 June 30
 
2020
 
2019
 
2020
 
2019
Interest cost
$
25

 
$
32

 
$
5

 
$
8

Expected return on assets
(69
)
 
(69
)
 
(12
)
 
(11
)
Recognized actuarial loss
12

 
8

 
—

 
1

Settlement loss
15

 
4

 
—

 
—

Amortization of prior service credit
—

 
—

 
(4
)
 
(6
)
Net periodic benefit credit
$
(17
)
 
$
(25
)
 
$
(11
)
 
$
(8
)