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Accumulated Other Comprehensive Income (Loss) (Tables) | 3 Months Ended
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Mar. 31, 2018
Equity [Abstract] |
Components of Accumulated Other Comprehensive Income | The following tables display the changes in accumulated other comprehensive income (loss) (“AOCI”) by component, net of tax, for the three months ended March 31, 2018 (in millions):
|  | Cumulative Translation Adjustment |  |  | Pension and Postretirement Costs |  |  | Derivative Financial Instruments |  |  | AOCI |
Balance at December 31, 2017 |  | $ | (318.8 | ) |  | $ | (385.5 | ) |  | $ | (58.8 | ) |  | $ | (763.1 | )
Other comprehensive (loss) income before reclassifications |  |  | 64.1 |  |  |  | (19.2 | ) |  |  | (8.8 | ) |  |  | 36.1 |
Amounts reclassified to earnings |  |  | — |  |  |  | 2.9 |  |  |  | 12.4 |  |  |  | 15.3 |
Net current period other comprehensive income (loss) |  |  | 64.1 |  |  |  | (16.3 | ) |  |  | 3.6 |  |  |  | 51.4 |
Balance at March 31, 2018 |  | $ | (254.7 | ) |  | $ | (401.8 | ) |  | $ | (55.2 | ) |  | $ | (711.7 | )
Schedule of Income Tax (Provision) Benefit Allocated to Components of OCI | The income tax provision (benefit) allocated to the components of other comprehensive income (loss) (“OCI”) for the periods indicated are as follows (in millions):
|  | Three Months Ended March 31, |
|  | 2018 |  |  | 2017 |
Foreign currency translation adjustments |  | $ | 7.9 |  |  | $ | 1.8 |
Unrecognized pension and postretirement costs |  |  | 4.0 |  |  |  | 1.3 |
Derivative financial instruments |  |  | (0.2 | ) |  |  | (4.4 | )
Income tax provision (benefit) related to OCI |  | $ | 11.7 |  |  | $ | (1.3 | )

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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