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Employee Retirement Benefits
 9 Months Ended
Sep. 30, 2024
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 September 30,Nine months ended September 30,
2024202320242023
Service cost$1 $1 $4 $4 
Non-service (benefit) costs:
Interest cost4 3 10 9 
Expected return on plan assets(5)(5)(16)(15)
Amortization of actuarial loss (gain) and prior
  service cost 		— — 1 (2)
Other— — — (5)
 Total non-service benefit (1)(2)(5)(13)
Net periodic benefit$— $(1)$(1)$(9)

See our 2023 Annual Report on Form 10-K, Item 8, Note 13, Employee Retirement Benefits, Page 170, 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 2024 and 2023.
We made matching contributions totaling $7 million and $6 million to our 401(k) and Top Hat savings plans during the third quarter of 2024 and 2023, respectively, and contributions of $23 million and $20 million for the first nine months of 2024 and 2023, respectively.
We made no contributions to our qualified pension plan during the first nine months of 2024.