Three Months Ended

Nine Months Ended

September 30,

September 30,

2023

2022

2023

2022

U.S. defined benefit plans:

Pension benefits

Service cost of benefits earned during the period

$

0.6

$

1.0

$

1.9

$

2.8

Interest cost on projected benefit obligation

4.3

2.6

12.8

7.9

Expected return on plan assets

(6.3

)

(4.6

)

(18.8

)

(13.8

)

Amortization of net actuarial loss

1.4

1.0

4.1

3.1

Net periodic pension credit

$

-

$

-

$

-

$

-

Retiree health and life insurance benefits

Interest cost on projected benefit obligation

$

0.7

$

0.4

2.1

$

1.1

Amortization of prior service credit

(0.1

)

(0.1

)

(0.2

)

(0.2

)

Amortization of net actuarial gain

(1.4

)

(0.7

)

(4.3

)

(2.1

)

Net periodic postretirement credit

$

(0.8

)

$

(0.4

)

$

(2.4

)

$

(1.2

)