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Income Taxes (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2018
Income Taxes |  |
Potential decrease in unrecognized tax benefit |  | $ 0.9
Tax cuts and jobs act, income tax benefit | $ 53.4 |
Other Comprehensive Income (Loss) |  |
Income Taxes |  |
Tax cuts and jobs act, income tax benefit | 0.3 |
Continuing Operations |  |
Income Taxes |  |
Tax cuts and jobs act, income tax benefit | 57.7 |
Discontinued Operations |  |
Income Taxes |  |
Tax cuts and jobs act, income tax benefit | $ 4.6 |

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- Definition Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Provisional Income Tax Expense (Benefit) + References No definition available. + Details
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- Definition Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d)(3) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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