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Retirement Benefits (Tables) | 6 Months Ended
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Jun. 30, 2015
Compensation and Retirement Disclosure [Abstract] |
Schedule of Net Benefit Costs | The following table presents the components of net periodic pension cost and amounts recognized in other comprehensive income (loss) for our pension plans:
|  | Three Months Ended |  | Six Months Ended
|  | June 30, |  | June 30,
(in millions) |  | 2015 |  | 2014 |  | 2015 |  | 2014
Components of net periodic pension cost: |  |  |  |  |  |  |  |
Service cost |  | $ | 0.4 |  |  | $ | 0.4 |  |  | $ | 0.7 |  |  | $ | 0.7 |
Interest cost |  | 0.5 |  |  | 0.5 |  |  | 0.9 |  |  | 1.1 |
Expected return on plan assets |  | (0.6 | ) |  | (0.6 | ) |  | (1.1 | ) |  | (1.3 | )
Amortization of net actuarial losses(a) |  | 0.2 |  |  | — |  |  | 0.4 |  |  | 0.2 |
Net periodic pension cost |  | $ | 0.5 |  |  | $ | 0.3 |  |  | $ | 0.9 |  |  | $ | 0.7 |
(a) | Reflects amounts reclassified from accumulated other comprehensive income (loss) to net income.

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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=58740216&loc=d3e1928-114920 + Details
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