v3.26.1
Employee Retirement Benefits (Tables)
 6 Months Ended
Jun. 30, 2026
Retirement Benefits [Abstract]  
Schedule of Defined Benefit Plans Disclosures
The following summarizes the components of net periodic benefit for our qualified and supplemental pension plans:
(Dollars in millions)Three months ended June 30,Six months ended June 30,
2026202520262025
Service cost$1 $1 $2 $2 
Non-service (benefit) costs:
Interest cost3 3 7 7 
Expected return on plan assets(6)(5)(12)(11)
Amortization of actuarial gain and prior service cost(1)(1)(2)(2)
 Total non-service benefit (4)(3)(7)(6)
Net periodic benefit$(3)$(2)$(5)$(4)