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Employee Benefit Plans
 3 Months Ended
Mar. 31, 2021
Retirement Benefits [Abstract]  
Employee Benefit Plans Employee Benefit Plans
The components of net periodic benefit cost, included in other operating expenses on the Company’s condensed consolidated statements of income, for the three months ended March 31, 2021 and 2020 were as follows (dollars in millions):
 Pension BenefitsOther Benefits
 Three months ended March 31,Three months ended March 31,
 2021202020212020
Service cost$4 $3 $1 $— 
Interest cost1 2 — 1 
Expected return on plan assets(2)(2)— — 
Amortization of prior service cost (credit)— — — — 
Amortization of prior actuarial losses1 1 — — 
Net periodic benefit cost$4 $4 $1 $1