Three Months Ended

Nine Months Ended

September 30,

2025

2024

2025

2024

U.S. defined benefit plans:

Pension benefits

Service cost of benefits earned during the period

$

0.5

$

0.6

$

1.7

$

1.8

Interest cost on projected benefit obligation

4.1

4.2

12.4

12.6

Expected return on plan assets

(5.6

)

(6.0

)

(16.8

)

(18.2

)

Amortization of net actuarial loss

1.4

1.3

4.1

3.9

Net periodic pension cost

$

0.4

$

0.1

$

1.4

$

0.1

Retiree health and life insurance benefits

Interest cost on projected benefit obligation

$

0.5

$

0.6

$

1.5

$

1.6

Amortization of prior service credit

-

(0.1

)

(0.1

)

(0.2

)

Amortization of net actuarial gain

(0.5

)

(2.2

)

(1.3

)

(6.4

)

Net periodic postretirement (credit) cost

$

-

$

(1.7

)

$

0.1

$

(5.0

)