v3.25.1
Benefit Plans (Tables)
3 Months Ended
Mar. 31, 2025
Retirement Benefits [Abstract]  
Components of Net Periodic Benefit Cost
The components of net periodic (benefit) cost for defined benefit pension plans are summarized in the following table:

Three Months Ended March 31,
(Dollars in millions)Income Statement Location20252024
Service cost(1)
Personnel expense / Net income from discontinued operations$68 $96 
Interest costOther expense114 108 
Estimated return on plan assetsOther expense(243)(244)
Amortization and otherOther expense— 
Net periodic (benefit) cost$(61)$(39)
(1)Includes $7 million for the three months ended March 31, 2024 of service cost reported in net income from discontinued operations for the qualified defined benefit pension plan for employees of TIH.