Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent	23.00%	22.00%	18.00%	17.00%
Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-based Payment Arrangement, Amount	$ 12.7	$ 6.0
Tax Cuts and Jobs Act, Income Tax Expense (Benefit)				$ 12.1
Statutory federal rate			21.00%
Foreign Earnings Repatriated			$ 249.0
foreign withholding tax			$ 13.1

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

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.

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Amount of foreign earnings repatriated from subsidiaries outside the country of domicile.

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Amount of income tax expense (benefit) from effect of Tax Cuts and Jobs Act.

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Foreign withholding tax on repatriated earnings

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