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Pension Benefits and Postretirement Benefits Other Than Pensions
 9 Months Ended
Sep. 30, 2020
Retirement Benefits [Abstract]  
Pension Benefits and Postretirement Benefits Other Than Pensions Pension Benefits and Postretirement Benefits Other Than Pensions
The Company sponsors a qualified defined benefit pension plan (the “Pension Plan”) that covers approximately 8,510 participants and beneficiaries, of which 1,040 are active employees. Effective January 1, 2006 the Pension Plan was closed to new hires, and effective June 30, 2016, benefit accruals were frozen for substantially all of the participants under the Pension Plan. The components of Pension Income for the Pension Plan for the nine and three months ended September 30, 2020 and 2019 were:
 Nine Months EndedThree Months Ended
(Dollars in Millions)Sep 30,
2020		Sep 30,
2019		Sep 30,
2020		Sep 30,
2019
Interest Cost on Projected Benefit Obligation$13.5 $16.8 $4.5 $5.6 
Expected Return on Plan Assets(22.0)(22.9)(7.3)(7.6)
Amortization of Net Actuarial Loss4.6 2.2 1.6 0.7 
Total Pension Benefit Recognized$(3.9)$(3.9)$(1.2)$(1.3)
The Company sponsors two other than pension postretirement benefit (“OPEB”) plans (together the “OPEB Plans”) that together provide medical, dental and/or life insurance benefits to approximately 590 retired and 500 active employees.
The components of OPEB benefits for the OPEB Plans for the nine and three months ended September 30, 2020 and 2019 were:
 Nine Months EndedThree Months Ended
(Dollars in Millions)Sep 30,
2020		Sep 30,
2019		Sep 30,
2020		Sep 30,
2019
Service Cost$0.1 $0.1 $— $— 
Interest Cost on Accumulated Postretirement Benefit Obligation0.2 0.3 — — 
Amortization of Prior Service Credit(0.9)(1.0)(0.2)(0.3)
Amortization of Net Gain(1.4)(1.8)(0.4)(0.8)
Total OPEB Benefit Recognized$(2.0)$(2.4)$(0.6)$(1.1)
The non-service cost components of the Pension Plan and OPEB Plans are presented within the Interest and Other Expenses line item in the Condensed Consolidated Statements of Income.