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Pension and Postretirement Benefits (Tables) | 3 Months Ended
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Mar. 31, 2018
Pension Plans |
Defined Benefit Plan Disclosure [Line Items] |
Components of Net Periodic Benefit Expense | Net periodic pension expense for the three months ended March 31, 2018 and 2017 is presented below:
|  | Three Months Ended March 31, 2018 |  | Three Months Ended March 31, 2017
|  | Total |  | U.S. Plans |  | International Plans |  | Total |  | U.S. Plans |  | International Plans
Service cost(i) |  | $ | 0.8 |  |  | $ | — |  |  | $ | 0.8 |  |  | $ | 1.6 |  |  | $ | — |  |  | $ | 1.6 |
Interest cost |  | 64.0 |  |  | 46.6 |  |  | 17.4 |  |  | 69.9 |  |  | 52.5 |  |  | 17.4 |
Expected return on plan assets |  | (87.2 | ) |  | (57.6 | ) |  | (29.6 | ) |  | (89.4 | ) |  | (58.8 | ) |  | (30.6 | )
Amortization of prior service benefit |  | (1.5 | ) |  | (0.6 | ) |  | (0.9 | ) |  | (1.3 | ) |  | (0.6 | ) |  | (0.7 | )
Recognized net actuarial loss |  | 42.1 |  |  | 31.2 |  |  | 10.9 |  |  | 43.7 |  |  | 30.9 |  |  | 12.8 |
Net periodic pension expense (benefit) |  | $ | 18.2 |  |  | $ | 19.6 |  |  | $ | (1.4 | ) |  | $ | 24.5 |  |  | $ | 24.0 |  |  | $ | 0.5 |
(i) | Service cost is reported in cost of revenue - services and selling, general and administrative expenses. All other components of net periodic pension expense are reported in other income (expense), net in the Consolidated Statements of Income.
Other Postretirement Benefit Plans |
Defined Benefit Plan Disclosure [Line Items] |
Components of Net Periodic Benefit Expense | Net periodic postretirement benefit expense for the three months ended March 31, 2018 and 2017 is presented below:
|  | Three Months Ended March 31,
|  | 2018 |  | 2017
Service cost(i) |  | $ | 0.2 |  |  | $ | 0.1 |
Interest cost |  | 1.2 |  |  | 1.5 |
Expected return on assets |  | (0.1 | ) |  | (0.1 | )
Recognized net actuarial loss |  | 0.3 |  |  | 0.3 |
Amortization of prior service benefit |  | (0.5 | ) |  | (0.1 | )
Net periodic postretirement benefit expense |  | $ | 1.1 |  |  | $ | 1.7 |
(i) | Service cost is reported in selling, general and administrative expenses. All other components of net periodic postretirement benefit expense are reported in other income (expense), net in the Consolidated Statements of Income.

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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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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