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Retirement Benefits (Tables) | 9 Months Ended
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Sep. 30, 2019
Retirement Benefits [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 |  | Nine Months Ended
|  | September 30, |  | September 30,
(in millions) |  | 2019 |  | 2018 |  | 2019 |  | 2018
Components of net periodic pension cost: |  |  |  |  |  |  |  |
Service cost |  | $ | 0.6 |  |  | $ | 0.3 |  |  | $ | 1.5 |  |  | $ | 1.1 |
Interest cost |  | 0.5 |  |  | 0.5 |  |  | 1.5 |  |  | 1.4 |
Expected return on plan assets |  | (0.7 | ) |  | (0.5 | ) |  | (2.0 | ) |  | (1.6 | )
Amortization of net actuarial losses(a) |  | 0.1 |  |  | 0.2 |  |  | 0.4 |  |  | 0.5 |
Amortization of transitional obligation |  | — |  |  | (0.1 | ) |  | — |  |  | (0.1 | )
Net periodic pension cost |  | $ | 0.5 |  |  | $ | 0.4 |  |  | $ | 1.4 |  |  | $ | 1.3 |
(a) Reflects amounts reclassified from accumulated other comprehensive income 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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