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PENSION AND POST-RETIREMENT PLANS | 9 Months Ended
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Sep. 30, 2018
PENSION AND POST-RETIREMENT PLANS |
PENSION AND POST-RETIREMENT PLANS | 11. PENSION AND POST-RETIREMENT PLANS The Company’s pension and post-retirement plans are described in Note 11 to the Consolidated Financial Statements included in Part II, Item 8 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2017. The following tables provide the components of net periodic benefit cost for the Company’s qualified defined benefit pension and post-retirement plans for the three and nine months ended September 30, 2018 and 2017:
|  | Pension Benefits |  | Post-retirement Benefits
|  | Three Months Ended September 30, |  | Three Months Ended September 30,
(In millions) |  | 2018 |  | 2017 |  | 2018 |  | 2017
Components of net periodic benefit cost (benefit): |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 1.1 |  | $ | 1.1 |  | $ | 0.2 |  | $ | (0.4)
Interest cost |  |  | 2.1 |  |  | 2.5 |  |  | 0.3 |  |  | (0.6)
Expected return on plan assets |  |  | (3.3) |  |  | (3.3) |  |  | — |  |  | —
Amortization of net loss |  |  | 1.0 |  |  | 1.3 |  |  | 0.3 |  |  | 0.3
Amortization of prior service credit |  |  | (0.5) |  |  | (0.6) |  |  | (1.0) |  |  | (2.8)
Other adjustments |  |  | — |  |  | 0.1 |  |  | — |  |  | —
Net periodic benefit cost |  | $ | 0.4 |  | $ | 1.1 |  | $ | (0.2) |  | $ | (3.5)
|  | Pension Benefits |  | Post-retirement Benefits
|  | Nine Months Ended September 30, |  | Nine Months Ended September 30,
(In millions) |  | 2018 |  | 2017 |  | 2018 |  | 2017
Components of net periodic benefit cost (benefit): |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 3.3 |  | $ | 3.0 |  | $ | 0.5 |  | $ | 0.4
Interest cost |  |  | 6.4 |  |  | 7.3 |  |  | 0.8 |  |  | 0.8
Expected return on plan assets |  |  | (10.1) |  |  | (10.1) |  |  | — |  |  | —
Amortization of net loss |  |  | 3.4 |  |  | 3.8 |  |  | 1.1 |  |  | 0.9
Amortization of prior service credit |  |  | (1.7) |  |  | (1.7) |  |  | (2.8) |  |  | (2.8)
Other adjustments |  |  | — |  |  | 0.1 |  |  | — |  |  | —
Net periodic benefit cost |  | $ | 1.3 |  | $ | 2.4 |  | $ | (0.4) |  | $ | (0.7)

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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 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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