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Pension and Post-Retirement Benefit Plans (Tables) | 9 Months Ended
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Sep. 30, 2018
Retirement Benefits [Abstract] |
Components of net periodic benefit cost | The components of net periodic benefit cost were as follows (in millions):
| For the Three Months Ended September 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
| Pension Benefits |  | Other Benefits
Service cost | $ | 1.3 |  |  | $ | 1.3 |  |  | $ | — |  |  | $ | — |
Interest cost | 3.1 |  |  | 3.2 |  |  | — |  |  | — |
Expected return on plan assets | (4.7 | ) |  | (5.3 | ) |  | — |  |  | — |
Amortization of prior service cost | 0.1 |  |  | — |  |  | (0.3 | ) |  | (0.6 | )
Recognized actuarial loss | 2.3 |  |  | 2.0 |  |  | 0.3 |  |  | 0.4 |
Settlements and curtailments | 0.3 |  |  | — |  |  | — |  |  | — |
Net periodic benefit cost | $ | 2.4 |  |  | $ | 1.2 |  |  | $ | — |  |  | $ | (0.2 | )

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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