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Pension and Post-Retirement Benefit Plans (Tables) | 6 Months Ended
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Jun. 30, 2017
Compensation and Retirement Disclosure [Abstract] |
Components of net periodic benefit cost | The components of net periodic benefit cost were as follows (in millions):
| For the Three Months Ended June 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
| Pension Benefits |  | Other Benefits
Service cost | $ | 1.2 |  |  | $ | 1.1 |  |  | $ | — |  |  | $ | — |
Interest cost | 3.1 |  |  | 3.9 |  |  | — |  |  | — |
Expected return on plan assets | (5.4 | ) |  | (5.7 | ) |  | — |  |  | — |
Amortization of prior service cost | 0.1 |  |  | 0.1 |  |  | (0.6 | ) |  | (0.8 | )
Recognized actuarial loss | 2.0 |  |  | 1.7 |  |  | 0.4 |  |  | 0.4 |
Settlements and curtailments | 0.3 |  |  | — |  |  | — |  |  | — |
Net periodic benefit cost (1) | $ | 1.3 |  |  | $ | 1.1 |  |  | $ | (0.2 | ) |  | $ | (0.4 | )
| For the Six Months Ended June 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
| Pension Benefits |  | Other Benefits
Service cost | $ | 2.5 |  |  | $ | 2.2 |  |  | $ | — |  |  | $ | — |
Interest cost | 6.4 |  |  | 7.7 |  |  | — |  |  | — |
Expected return on plan assets | (10.7 | ) |  | (10.8 | ) |  | — |  |  | — |
Amortization of prior service cost | 0.1 |  |  | 0.1 |  |  | (1.2 | ) |  | (1.5 | )
Recognized actuarial loss | 4.0 |  |  | 3.8 |  |  | 0.7 |  |  | 0.7 |
Settlements and curtailments | 0.6 |  |  | — |  |  | — |  |  | — |
Net periodic benefit cost (1) | $ | 2.9 |  |  | $ | 3.0 |  |  | $ | (0.5 | ) |  | $ | (0.8 | )
(1) All net periodic benefit cost for the three and six months ended June 30, 2017 and 2016 related to continuing operations.

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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=65897934&loc=d3e1928-114920 + Details
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