Pension Plans

Three Months Ended June 30,

Six Months Ended June 30,

2026

2025

2026

2025

Service cost

$

2.1

$

2.6

$

4.1

$

5.2

Interest cost

13.2

14.3

26.5

28.6

Expected return on plan assets

(15.8

)

(15.6

)

(31.6

)

(31.2

)

Net amortization of unrecognized amounts

Prior service cost

1.4

1.4

2.8

2.8

Actuarial loss

—

—

—

—

Net periodic benefit cost

$

0.9

$

2.7

$

1.8

$

5.4