Three Months Ended

Six Months Ended

June 30,

2025

2024

2025

2024

U.S. defined benefit plans:

Pension benefits

Service cost of benefits earned during the period

$

0.6

$

0.6

$

1.2

$

1.2

Interest cost on projected benefit obligation

4.1

4.2

8.3

8.4

Expected return on plan assets

(5.6

)

(6.1

)

(11.2

)

(12.2

)

Amortization of net actuarial loss

1.4

1.3

2.7

2.6

Net periodic pension cost

$

0.5

$

-

$

1.0

$

-

Retiree health and life insurance benefits

Interest cost on projected benefit obligation

$

0.5

$

0.5

$

1.0

$

1.0

Amortization of prior service credit

(0.1

)

-

(0.1

)

(0.1

)

Amortization of net actuarial gain

(0.4

)

(2.1

)

(0.8

)

(4.2

)

Net periodic postretirement (credit) cost

$

-

$

(1.6

)

$

0.1

$

(3.3

)