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Employee benefit plans (Tables)
6 Months Ended
Jun. 30, 2022
Employee benefit plans  
Summary of the components of net periodic benefit income

Three Months Ended June 30, 

Six Months Ended June 30, 

    

2022

2021

2022

    

2021

Interest cost

$

3

$

4

$

7

$

7

Expected return on plan assets

(8)

(7)

(15)

(14)

Amortization of net loss

2

3

Expenses paid

1

1

Net periodic benefit credit

$

(5)

$

(1)

$

(7)

$

(3)