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Discontinued Operations Discontinued Operations Income Statement (Tables) | 9 Months Ended
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Sep. 30, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
Disposal Groups, Including Discontinued Operations [Table Text Block] | The following is a summary of operating results included in income (loss) from discontinued operations for the three and nine months ended September 30, 2019 and 2018:
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2019 |  | 2018 |  | 2019 |  | 2018
|  | (in millions)
Revenues |  | $ | — |  |  | $ | 334.8 |  |  | $ | — |  |  | $ | 966.0 |
Cost of revenues |  | — |  |  | 295.6 |  |  | 0.1 |  |  | 786.5 |
Selling, engineering, and administrative expenses |  | 0.5 |  |  | 35.6 |  |  | 2.8 |  |  | 102.0 |
Other (income) expense |  | — |  |  | (0.2 | ) |  | — |  |  | 1.9 |
Income (loss) from discontinued operations before income taxes |  | (0.5 | ) |  | 3.8 |  |  | (2.9 | ) |  | 75.6 |
Provision (benefit) for income taxes |  | (0.1 | ) |  | 4.0 |  |  | (0.6 | ) |  | 21.2 |
Income (loss) from discontinued operations, net of income taxes |  | $ | (0.4 | ) |  | $ | (0.2 | ) |  | $ | (2.3 | ) |  | $ | 54.4 |

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