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Selected Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract] |
Schedule of Quarterly Results of Operations | The following is a summary of the quarterly results of operations of the Company for the years ended December 31, 2016 and 2017:
|  | 2016
|  | First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter
Revenue |  | $ | 545.4 |  |  | $ | 554.1 |  |  | $ | 544.7 |  |  | $ | 550.3 |
Operating income |  | 246.8 |  |  | 247.0 |  |  | 238.5 |  |  | 301.9 |
Income before income taxes |  | 230.5 |  |  | 235.9 |  |  | 226.2 |  |  | 281.9 |
Net income (controlling interest) |  | 104.0 |  |  | 108.3 |  |  | 110.2 |  |  | 150.2 |
Earnings per share (diluted) |  | $ | 1.90 |  |  | $ | 1.98 |  |  | $ | 2.02 |  |  | $ | 2.67 |
|  | 2017
|  | First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter(1)
Revenue |  | $ | 544.3 |  |  | $ | 570.9 |  |  | $ | 585.7 |  |  | $ | 604.1 |
Operating income |  | 262.5 |  |  | 275.9 |  |  | 289.5 |  |  | 280.0 |
Income before income taxes |  | 253.3 |  |  | 266.9 |  |  | 282.9 |  |  | 264.0 |
Net income (controlling interest) |  | 122.5 |  |  | 126.3 |  |  | 125.4 |  |  | 315.4 |
Earnings per share (diluted) |  | $ | 2.13 |  |  | $ | 2.22 |  |  | $ | 2.22 |  |  | $ | 5.50 |
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(1) | In the fourth quarter of 2017, the Company recorded a provisional one-time net benefit from changes in U.S tax laws (see Note 22) and an expense associated with the impairment of one of its Affiliates accounted for under the equity method (see Note 13).

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=84173487&loc=d3e1280-108306 + Details
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