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Pension Benefits and Postretirement Benefits Other Than Pensions | 3 Months Ended
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Mar. 31, 2018
Compensation and Retirement Disclosure [Abstract] |
Pension Benefits and Postretirement Benefits Other Than Pensions | Note 9 - Pension Benefits and Postretirement Benefits Other Than Pensions The Company sponsors a qualified defined benefit pension plan (the “Pension Plan”) that covers approximately 9,000 participants and beneficiaries, of which 1,600 are active employees. The Pension Plan is closed to employees newly-hired after January 1, 2006. On May 12, 2016, the Company amended the Pension Plan to freeze benefit accruals, effective June 30, 2016, for substantially all of the participants under the plan. The components of Pension Benefit for the Pension Plan for the three months ended March 31, 2018 and 2017 were:
|  | Three Months Ended
(Dollars in Millions) |  | Mar 31, 2018 |  | Mar 31, 2017
Service Cost |  | $ | — |  |  | $ | — |
Interest Cost on Projected Benefit Obligation |  | 5.1 |  |  | 5.1 |
Expected Return on Plan Assets |  | (7.2 | ) |  | (7.7 | )
Amortization of Accumulated Net Unrecognized Pension Costs |  | 1.0 |  |  | 0.6 |
Total Pension Benefit Recognized |  | $ | (1.1 | ) |  | $ | (2.0 | )
Note 9 - Pension Benefits and Postretirement Benefits Other Than Pensions (continued) The Company also sponsors an other postretirement benefit (“OPEB”) plan that provides medical, dental and/or life insurance benefits to approximately 475 retired and 200 active employees (the “OPEB Plan”). The components of OPEB Benefit for the OPEB Plan for the three months ended March 31, 2018 and 2017 were:
|  | Three Months Ended
(Dollars in Millions) |  | Mar 31, 2018 |  | Mar 31, 2017
Service Cost |  | $ | — |  |  | $ | — |
Interest Cost on Accumulated Postretirement Benefit Obligation |  | 0.1 |  |  | 0.1 |
Amortization of Prior Service Credit |  | (0.3 | ) |  | (0.3 | )
Amortization of Accumulated Net Unrecognized Gain |  | (0.4 | ) |  | (0.4 | )
Total OPEB Benefit Recognized |  | $ | (0.6 | ) |  | $ | (0.6 | )
The non-service cost component of the Pension Plan and OBEB Plan is presented within the Interest and Other Expenses line item in the Condensed Consolidated Statement of Operations.

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