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Income Taxes (Narrative) (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2017 USD ($)
Income Tax Disclosure [Abstract] |
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount | $ 67.9
Effective Income Tax Rate Reconciliation, Transition tax, Net of Foreign Taxes Deemed Paid, Amount | 11.0
Estimated Reduction, Income Tax Liability | 28.0
Estimated Reduction, Net Deferred Tax Assets | 19.0
Deferred Tax Assets, Tax Credit Carryforwards, Foreign | 15.0
Operating Loss Carryforwards | 302.1
Deferred Tax Assets, Valuation Allowance | 54.0
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount | 52.3
Second component of tax deductible goodwill, net of tax | 1.6
Liability for Uncertain Tax Positions, Noncurrent | 21.8
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense | 4.5
Deferred tax asset, Uncertain tax position | 4.9
Unrecognized Tax Benefits, Interest on Income Taxes Expense | $ 1.5

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign tax credit carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=84176650&loc=d3e32059-109318 + Details
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