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Pension Benefits and Postretirement Benefits Other Than Pensions | 9 Months Ended
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Sep. 30, 2017
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 Expense (Benefit) for the Pension Plan for the nine and three months ended September 30, 2017 and 2016 were:
|  | Nine Months Ended |  | Three Months Ended
(Dollars in Millions) |  | Sep 30, 2017 |  | Sep 30, 2016 |  | Sep 30, 2017 |  | Sep 30, 2016
Service Cost Earned |  | $ | — |  |  | $ | 4.8 |  |  | $ | — |  |  | $ | — |
Interest Cost on Projected Benefit Obligation |  | 15.4 |  |  | 15.2 |  |  | 5.1 |  |  | 4.8 |
Expected Return on Plan Assets |  | (23.2 | ) |  | (24.5 | ) |  | (7.7 | ) |  | (8.3 | )
Amortization of Accumulated Net Unrecognized Pension Costs |  | 2.0 |  |  | 5.8 |  |  | 0.7 |  |  | 0.9 |
Curtailment Gain |  | — |  |  | (0.3 | ) |  | — |  |  | — |
Total Pension Expense (Benefit) Recognized |  | $ | (5.8 | ) |  | $ | 1.0 |  |  | $ | (1.9 | ) |  | $ | (2.6 | )
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 nine and three months ended September 30, 2017 and 2016 were:
|  | Nine Months Ended |  | Three Months Ended
(Dollars in Millions) |  | Sep 30, 2017 |  | Sep 30, 2016 |  | Sep 30, 2017 |  | Sep 30, 2016
Service Cost Earned |  | $ | 0.1 |  |  | $ | 0.1 |  |  | — |  |  | 0.1 |
Interest Cost on Accumulated Postretirement Benefit Obligation |  | 0.3 |  |  | 0.6 |  |  | 0.1 |  |  | 0.2 |
Amortization of Prior Service Credit |  | (1.0 | ) |  | — |  |  | (0.3 | ) |  | — |
Amortization of Accumulated Net Unrecognized Gain |  | (1.4 | ) |  | (1.1 | ) |  | (0.5 | ) |  | (0.4 | )
Total OPEB Benefit |  | $ | (2.0 | ) |  | $ | (0.4 | ) |  | $ | (0.7 | ) |  | $ | (0.1 | )

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2410-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39675-114964 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66047640&loc=d3e39622-114963 + Details
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