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Pension And Other Retiree Benefits (Tables) | 3 Months Ended
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Mar. 31, 2019
Retirement Benefits [Abstract] |
Components of Net Periodic Benefit Cost for Pension and Post-Retirement Plans | The components of net periodic benefit (income) cost for pension and post-retirement plans for the three months ended March 31, 2019 and 2018 were as follows:
| Three Months Ended March 31,
| Pension |  | Post-retirement
| U.S. |  | International |  |  |  |
(in millions) | 2019 |  | 2018 |  | 2019 |  | 2018 |  | 2019 |  | 2018
Service cost | $ | 0.4 |  |  | $ | 0.4 |  |  | $ | 0.3 |  |  | $ | 0.5 |  |  | $ | — |  |  | $ | — |
Interest cost | 1.8 |  |  | 1.7 |  |  | 3.4 |  |  | 3.4 |  |  | 0.1 |  |  | — |
Expected return on plan assets | (2.9 | ) |  | (2.9 | ) |  | (5.1 | ) |  | (5.9 | ) |  | — |  |  | — |
Amortization of net loss (gain) | 0.5 |  |  | 0.6 |  |  | 0.8 |  |  | 0.9 |  |  | (0.1 | ) |  | (0.1 | )
Amortization of prior service cost | 0.1 |  |  | 0.1 |  |  | — |  |  | — |  |  | — |  |  | — |
Net periodic benefit income(1) | $ | (0.1 | ) |  | $ | (0.1 | ) |  | $ | (0.6 | ) |  | $ | (1.1 | ) |  | $ | — |  |  | $ | (0.1 | )
(1) | The components, other than service cost, are included in the line "Non-operating pension income" in the Consolidated Statements of 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://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=108410482&loc=d3e1928-114920 + Details
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