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Pension and Other Retiree Benefits
 3 Months Ended
Mar. 31, 2024
Retirement Benefits [Abstract]  
Pension and Other Retiree Benefits

5. Pension and Other Retiree Benefits

 

The components of net periodic benefit (income) cost for pension and post-retirement plans for the three months ended March 31, 2024 and 2023 were as follows:

 

 

 

Three Months Ended March 31,

 

 

 

Pension

 

 

Post-retirement

 

 

 

U.S.

 

 

International

 

 

 

 

 

 

 

(in millions)

 

2024

 

 

2023

 

 

2024

 

 

2023

 

 

2024

 

 

2023

 

Service cost

 

$

—

 

 

$

—

 

 

$

0.2

 

 

$

0.1

 

 

$

—

 

 

$

—

 

Interest cost

 

 

1.9

 

 

 

2.0

 

 

 

4.6

 

 

 

4.9

 

 

 

—

 

 

 

—

 

Expected return on plan assets

 

 

(3.2

)

 

 

(3.0

)

 

 

(4.8

)

 

 

(5.3

)

 

 

—

 

 

 

—

 

Amortization of net loss (gain)

 

 

0.6

 

 

 

0.6

 

 

 

1.3

 

 

 

1.0

 

 

 

(0.1

)

 

 

(0.1

)

Amortization of prior service cost

 

 

—

 

 

 

—

 

 

 

—

 

 

 

0.1

 

 

 

—

 

 

 

—

 

Net periodic benefit (income) cost (1)

 

$

(0.7

)

 

$

(0.4

)

 

$

1.3

 

 

$

0.8

 

 

$

(0.1

)

 

$

(0.1

)

 

(1)
The components of net periodic benefit (income) cost, other than service cost, are included in the line "Non-operating pension expense" in the Consolidated Statements of Loss.

 

We expect to contribute approximately $15.8 million to our defined benefit plans in 2024. For the three months ended March 31, 2024, we have contributed $4.6 million to these plans.