Three Months Ended

Nine Months Ended

September 30,

September 30,

2022

2021

2022

2021

U.S. defined benefit plans:

Pension benefits

Service cost of benefits earned during the period

$

1.0

$

1.2

$

2.8

$

3.6

Interest cost on projected benefit obligation

2.6

2.2

7.9

6.7

Expected return on plan assets

(4.6

)

(4.1

)

(13.8

)

(12.4

)

Amortization of net actuarial loss

1.0

0.9

3.1

2.7

Net periodic pension cost

$

-

$

0.2

$

-

$

0.6

Retiree health and life insurance benefits

Interest cost on projected benefit obligation

$

0.4

$

0.3

$

1.1

$

0.9

Amortization of prior service credit

(0.1

)

(0.1

)

(0.2

)

(0.2

)

Amortization of net actuarial gain

(0.7

)

(0.6

)

(2.1

)

(1.7

)

Net periodic postretirement (credit)

$

(0.4

)

$

(0.4

)

$

(1.2

)

$

(1.0

)