v3.25.3
Pension Benefits (Tables)
 9 Months Ended
Sep. 30, 2025
Retirement Benefits [Abstract]  
Summary of net periodic benefit cost
Net periodic benefit costs for our significant defined benefit plans include the following components:
Three Months Ended September 30,Nine Months Ended September 30,
U.S. Plans Non-U.S. Plan U.S. Plans Non-U.S. Plan
20252024202520242025202420252024
(Dollars in millions)
Service cost$— $— $2 $2 $— $— $5 $5 
Interest cost2 2 1 1 6 6 3 3 
Expected return on plan assets(2)(2)(2)(2)(6)(6)(5)(6)
Amortization of prior service (credit)— — — — — — (1)(1)
Total$— $— $1 $1 $— $— $2 $1