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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	Dec. 31, 2018
Income tax expense	$ 6.0	$ 2.0	$ 3.0	$ 19.9
Effective income tax rate, continuing operations	10.20%	1.30%	3.10%	7.60%
Other Tax Expense (Benefit)			$ (9.3)
Unrecognized tax benefit liability, including penalties and accrued interest	$ 51.3		$ 51.3		$ 45.6
Foreign Tax Authority [Member]
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities		$ 20.0

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Unrecognized tax benefit liability, including penalties and accrued interest

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