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Restructuring and other (Tables) | 3 Months Ended
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Mar. 31, 2018
Restructuring and Related Activities [Abstract] |
Schedule of Restructuring and Other Costs | The following table summarizes pre-tax restructuring and other costs for the periods presented:
|  | Three Months Ended March 31,
|  | 2018 |  | 2017
Employee severance (1) |  | $ | 5.1 |  |  | $ | 2.7 |
Acquisitions and related costs(2) |  | 7.8 |  |  | 3.4 |
Contingent consideration adjustment(3) |  | 18.0 |  |  | — |
Legal and related |  | 16.0 |  |  | — |
Restructuring, integration and other |  | 5.3 |  |  | 3.1 |
Total |  | $ | 52.2 |  |  | $ | 9.2 |
(1) Inclusive of employee severance and termination costs associated with restructuring and integration activities.
(2) Three months ended March 31, 2018 includes $7.7 million related to the NYX acquisition.
(3) Represents contingent consideration fair value adjustment based on remeasurement as of March 31, 2018 (see Note 12).

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- Definition Tabular disclosure of an entity's restructuring reserve that occurred during the period associated with the exit from or disposal of business activities or restructurings for each major type of cost. This element may also include a description of any reversal and other adjustment made during the period to the amount of an accrued liability for restructuring activities. This element may be used to encapsulate the roll forward presentations of an entity's restructuring reserve by type of cost and in total, and explanation of changes that occurred in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(2)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
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