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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2018 | Jun. 30, 2018
Retained Earnings Adjustments [Line Items] |  |
Unrecognized tax benefits |  | $ 0.3
Deferred Other Tax Expense (Benefit) |  | $ 3.8
Accounting Standards Update 2016-16 [Member] |  |
Retained Earnings Adjustments [Line Items] |  |
Cumulative Effect on Retained Earnings, Net of Tax | $ 5.1 |
Accounting Standards Update 2018-02 [Member] |  |
Retained Earnings Adjustments [Line Items] |  |
Cumulative Effect on Retained Earnings, Net of Tax | $ (22.7) |

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- Definition Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Provisional Income Tax Expense(Benefit) + References No definition available. + Details
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- Definition Amount of the cumulative effect on retained earnings net of related income tax effect. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22663-107794 + Details
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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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