Effective Income Tax Rate Reconciliation, Excluding Tax Cuts And Jobs Act Of 2017 Impact, Percent

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Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Transition Tax For Accumulated Foreign Earnings, Provisional Income Tax Expense

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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 valuation allowance for deferred tax assets.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Income Taxes (Details) - USD ($) $ in Millions	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Tax Contingency [Line Items]
Effective tax rate	17.80%	20.90%	26.60%	28.60%
Tax Act, benefit related to an adjustment of estimated transition tax liability	$ 0.9
Effective tax rate, excluding tax act impact, percent	23.00%
Uncertain tax positions for which the statutes of limitations expired				$ 1.4
Foreign Tax Authority
Income Tax Contingency [Line Items]
Reversals of previously-recorded valuation allowances	$ 2.0
Tax benefit related to repatriation of cash and tax expense	0.4
Cumulative tax catch-up adjustment	$ 0.5