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Employee Benefit Plans
9 Months Ended
Sep. 30, 2023
Retirement Benefits [Abstract]  
EMPLOYEE BENEFIT PLANS
NOTE 20 — EMPLOYEE BENEFIT PLANS

BancShares sponsors non-contributory defined benefit pension plans for its qualifying employees. The service cost component of net periodic benefit cost is included in salaries and wages while all other non-service cost components are included in other noninterest expense.

The components of net periodic benefit cost are as follows:
dollars in millionsThree Months Ended September 30,Nine Months Ended September 30,
2023202220232022
Service cost$$$$10 
Interest cost15 11 45 33 
Expected return on assets(21)(22)(64)(65)
Amortization of prior service cost— — — — 
Amortization of net actuarial loss— — 
Net periodic benefit$(4)$(5)$(12)$(13)