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Summary Quarterly Financial Information (Tables) | 12 Months Ended
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Dec. 31, 2018
Quarterly Financial Data [Abstract] |
Current Year Quarterly Financial Information [Table Text Block] | A summary of the unaudited quarterly results of operations for the years ended December 31, 2018 and 2017 is presented below.
| Year Ended December 31, 2018
| Successor
| First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter
| (In millions, except per share data)
Revenues | $ | 1,462.7 |  |  | $ | 1,309.4 |  |  | $ | 1,412.6 |  |  | $ | 1,397.1 |
Operating profit | 239.2 |  |  | 165.3 |  |  | 130.3 |  |  | 126.8 |
Income from continuing operations, net of income taxes | 208.3 |  |  | 120.0 |  |  | 83.9 |  |  | 233.5 |
Net income | 207.0 |  |  | 116.4 |  |  | 79.8 |  |  | 260.6 |
Net income attributable to common stockholders | 106.6 |  |  | 113.7 |  |  | 71.5 |  |  | 252.6 |
Basic EPS — continuing operations (1) | $ | 0.84 |  |  | $ | 0.94 |  |  | $ | 0.64 |  |  | $ | 1.99 |
Diluted EPS — continuing operations (1) | $ | 0.83 |  |  | $ | 0.93 |  |  | $ | 0.63 |  |  | $ | 1.97 |
Weighted average shares used in calculating basic EPS | 120.9 |  |  | 124.5 |  |  | 118.6 |  |  | 113.1 |
Weighted average shares used in calculating diluted EPS | 123.2 |  |  | 126.0 |  |  | 120.3 |  |  | 114.7 |
(1) | EPS for the quarters may not sum to the amounts for the year as each period is computed on a discrete basis.
Prior Year Quarterly Financial Information [Table Text Block] |
| Year Ended December 31, 2017
| Predecessor | Successor
| First Quarter |  | April 1 | April 2 through June 30 |  | Third Quarter |  | Fourth Quarter
| (In millions, except per share data)
Revenues | $ | 1,326.2 |  |  | $ | — |  | $ | 1,258.3 |  |  | $ | 1,477.2 |  |  | $ | 1,517.1 |
Operating profit | 212.5 |  |  | — |  | 152.6 |  |  | 209.5 |  |  | 301.7 |
Income (loss) from continuing operations, net of income taxes | 124.3 |  |  | (319.8 | ) | 101.4 |  |  | 233.7 |  |  | 378.0 |
Net income (loss) | 120.2 |  |  | (331.9 | ) | 98.7 |  |  | 230.0 |  |  | 364.6 |
Net income (loss) attributable to common stockholders | 115.4 |  |  | (331.9 | ) | (20.2 | ) |  | 201.4 |  |  | 317.4 |
Basic EPS — continuing operations (1) | $ | 6.46 |  |  | $ | (17.44 | ) | $ | (0.18 | ) |  | $ | 1.51 |  |  | $ | 2.50 |
Diluted EPS — continuing operations (1) | $ | 6.44 |  |  | $ | (17.44 | ) | $ | (0.18 | ) |  | $ | 1.49 |  |  | $ | 2.47 |
Weighted average shares used in calculating basic EPS | 18.3 |  |  | 18.3 |  | 96.8 |  |  | 101.6 |  |  | 104.8 |
Weighted average shares used in calculating diluted EPS | 18.4 |  |  | 18.3 |  | 96.8 |  |  | 103.1 |  |  | 106.5 |
(1) | EPS for the quarters may not sum to the amounts for the year as each period is computed on a discrete basis.

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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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