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Employee Retirement Benefits
 3 Months Ended
Mar. 31, 2025
Retirement Benefits [Abstract]  
Employee Retirement Benefits Employee Retirement Benefits
The following summarizes the components of net periodic benefit for our qualified and supplemental pension plans:
(Dollars in millions)Three months ended March 31,
20252024
Service cost$1 $1 
Non-service (benefit) costs:
Interest cost4 3 
Expected return on plan assets(6)(5)
Amortization of actuarial gain and prior service cost (1)— 
 Total non-service benefit (3)(2)
Net periodic benefit$(2)$(1)

See our 2024 Annual Report on Form 10-K, Item 8, Note 13, Employee Retirement Benefits, Page 167, for information on our retirement benefits. The net periodic benefit is allocated in the same proportion primarily to the underwriting, acquisition and insurance expenses line item with the remainder allocated to the insurance losses and contract holders' benefits line item on the condensed consolidated statements of income for both 2025 and 2024.

We made matching contributions totaling $11 million and $9 million to our 401(k) and Top Hat savings plans during the first quarter of 2025 and 2024, respectively.
We made no contributions to our qualified pension plan during the first three months of 2025.