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Summary Quarterly Financial Information (Tables) | 12 Months Ended
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Dec. 31, 2017
Quarterly Financial Data [Abstract] |
Quarterly Financial Information [Table Text Block] | A summary of the unaudited quarterly results of operations for the years ended December 31, 2017 and 2016 is presented below.
| 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 | 198.1 |  |  | — |  | 146.0 |  |  | 202.9 |  |  | 338.2 |
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.
Quarterly Financial Information - PY [Table Text Block] |
| Year Ended December 31, 2016
| Predecessor
| First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter
| (In millions, except per share data)
Revenues | $ | 1,027.2 |  |  | $ | 1,040.2 |  |  | $ | 1,207.1 |  |  | $ | 1,440.8 |
Operating profit (loss) | (102.7 | ) |  | (107.7 | ) |  | (21.6 | ) |  | (44.9 | )
Loss from continuing operations, net of income taxes | (167.7 | ) |  | (223.2 | ) |  | (97.7 | ) |  | (175.2 | )
Net loss | (171.1 | ) |  | (226.2 | ) |  | (135.8 | ) |  | (188.3 | )
Net loss attributable to common stockholders | (171.1 | ) |  | (227.9 | ) |  | (137.6 | ) |  | (192.7 | )
Basic and diluted EPS — continuing operations (1) | $ | (9.17 | ) |  | $ | (12.30 | ) |  | $ | (5.44 | ) |  | $ | (9.82 | )
Weighted average shares used in calculating basic and diluted EPS | 18.3 |  |  | 18.3 |  |  | 18.3 |  |  | 18.3 |
(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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