Three Months Ended

Six Months Ended

June 30,

June 30,

2023

2022

2023

2022

U.S. defined benefit plans:

Pension benefits

Service cost of benefits earned during the period

$

0.6

$

0.9

$

1.3

$

1.8

Interest cost on projected benefit obligation

4.3

2.6

8.5

5.3

Expected return on plan assets

(6.3

)

(4.6

)

(12.5

)

(9.2

)

Amortization of net actuarial loss

1.4

1.1

2.7

2.1

Net periodic pension cost

$

-

$

-

$

-

$

-

Retiree health and life insurance benefits

Interest cost on projected benefit obligation

$

0.7

$

0.3

1.4

$

0.7

Amortization of prior service credit

(0.1

)

-

(0.1

)

(0.1

)

Amortization of net actuarial gain

(1.4

)

(0.7

)

(2.9

)

(1.4

)

Net periodic postretirement (credit)

$

(0.8

)

$

(0.4

)

$

(1.6

)

$

(0.8

)