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Retirement and Postretirement Plans (Tables)
 9 Months Ended
Sep. 30, 2025
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]  
Schedule of Defined Benefit Plans Disclosures

The components of net periodic benefit cost (income) for the three months ended September 30, 2025 were as follows:

 

 

Pension

 

 

 

 

 

 

 

 

 

United States of America

 

 

United Kingdom

 

 

 

 

 

 

 

 

 

Bargaining
Plan

 

 

Supplemental
Plan

 

 

Pension
Scheme

 

 

Total
Pension

 

 

Postretirement
Plans

 

Service cost

 

$

2.2

 

 

$

—

 

 

$

—

 

 

$

2.2

 

 

$

0.1

 

Interest cost

 

 

6.5

 

 

 

0.2

 

 

 

0.7

 

 

 

7.4

 

 

 

1.1

 

Expected return on plan assets

 

 

(7.5

)

 

 

—

 

 

 

(0.6

)

 

 

(8.1

)

 

 

(0.7

)

Amortization of prior service cost

 

 

0.3

 

 

 

—

 

 

 

—

 

 

 

0.3

 

 

 

(1.5

)

Net Periodic Benefit Cost (Income)

 

$

1.5

 

 

$

0.2

 

 

$

0.1

 

 

$

1.8

 

 

$

(1.0

)

The components of net periodic benefit cost (income) for the three months ended September 30, 2024 were as follows:

 

 

Pension

 

 

 

 

 

 

 

 

 

United States of America

 

 

United Kingdom

 

 

 

 

 

 

 

 

 

Bargaining
Plan

 

 

Supplemental
Plan

 

 

Pension
Scheme

 

 

Total
Pension

 

 

Postretirement
Plans

 

Service cost

 

$

2.2

 

 

$

—

 

 

$

—

 

 

$

2.2

 

 

$

0.1

 

Interest cost

 

 

6.4

 

 

 

0.2

 

 

 

0.6

 

 

 

7.2

 

 

 

1.1

 

Expected return on plan assets

 

 

(7.0

)

 

 

—

 

 

 

(0.7

)

 

 

(7.7

)

 

 

(0.7

)

Amortization of prior service cost

 

 

0.3

 

 

 

—

 

 

 

—

 

 

 

0.3

 

 

 

(1.5

)

Net Periodic Benefit Cost (Income)

 

$

1.9

 

 

$

0.2

 

 

$

(0.1

)

 

$

2.0

 

 

$

(1.0

)

 

The components of net periodic benefit cost (income) for the nine months ended September 30, 2025 were as follows:

 

 

Pension

 

 

 

 

 

 

 

 

 

United States of America

 

 

United Kingdom

 

 

 

 

 

 

 

 

 

Bargaining
Plan

 

 

Supplemental
Plan

 

 

Pension
Scheme

 

 

Total
Pension

 

 

Postretirement
Plans

 

Service cost

 

$

6.6

 

 

$

—

 

 

$

—

 

 

$

6.6

 

 

$

0.3

 

Interest cost

 

 

19.5

 

 

 

0.6

 

 

 

2.1

 

 

 

22.2

 

 

 

3.3

 

Expected return on plan assets

 

 

(22.5

)

 

 

—

 

 

 

(1.8

)

 

 

(24.3

)

 

 

(2.1

)

Amortization of prior service cost

 

 

0.9

 

 

 

—

 

 

 

—

 

 

 

0.9

 

 

 

(4.5

)

Net Periodic Benefit Cost (Income)

 

$

4.5

 

 

$

0.6

 

 

$

0.3

 

 

$

5.4

 

 

$

(3.0

)

 

The components of net periodic benefit cost (income) for the nine months ended September 30, 2024 were as follows:

 

 

Pension

 

 

 

 

 

 

 

 

 

United States of America

 

 

United Kingdom

 

 

 

 

 

 

 

 

 

Bargaining
Plan

 

 

Salaried
Plan

 

 

Supplemental
Plan

 

 

Pension
Scheme

 

 

Total
Pension

 

 

Postretirement
Plans

 

Service cost

 

$

6.6

 

 

$

0.3

 

 

$

—

 

 

$

—

 

 

$

6.9

 

 

$

0.3

 

Interest cost

 

 

19.2

 

 

 

2.5

 

 

 

0.6

 

 

 

1.8

 

 

 

24.1

 

 

 

3.3

 

Expected return on plan assets

 

 

(21.0

)

 

 

(2.7

)

 

 

—

 

 

 

(2.1

)

 

 

(25.8

)

 

 

(2.1

)

Amortization of prior service cost

 

 

0.9

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

0.9

 

 

 

(4.5

)

Net remeasurement losses (gains)

 

 

—

 

 

 

1.8

 

 

 

—

 

 

 

—

 

 

 

1.8

 

 

 

—

 

Net Periodic Benefit Cost (Income)

 

$

5.7

 

 

$

1.9

 

 

$

0.6

 

 

$

(0.3

)

 

$

7.9

 

 

$

(3.0

)