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Retirement Plans
9 Months Ended
Sep. 30, 2020
Retirement Benefits [Abstract]  
Retirement Plans Retirement Plans
Defined Benefit Pension Plans
The Company’s net periodic benefit costs for plans for the three and nine months ended September 30, 2020 and 2019 were as follows:
 Three Months Ended September 30Nine Months Ended September 30
(Dollars in millions)2020201920202019
Service cost$$$$
Interest cost— 
Expected return on plan assets(1)(1)(2)(1)
Net periodic benefit cost$1 $ $3 $4 
The service cost and amortization of prior service cost components are reported among employee compensation costs in the unaudited Condensed Consolidated Statements of Operations. The remaining components (interest cost, expected return on plan assets and amortization of actuarial loss) are reported in Other non-operating items, net in the unaudited Condensed Consolidated Statements of Operations.