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

Three Months Ended 

Nine Months Ended

September 30, 

September 30, 

    

2022

    

2021

    

2022

    

2021

Interest cost

$

4

$

3

$

11

$

10

Expected return on plan assets

(7)

(7)

(22)

(21)

Amortization of net loss

1

4

Expenses paid

1

1

2

2

Net periodic benefit credit

$

(2)

$

(2)

$

(9)

$

(5)