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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Percentage 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 changes in the income tax rates.

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

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Amount of unrecognized tax benefits.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Provision for Income Taxes (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
Provision for Income Taxes
Income tax expense (benefit)	$ 10.6	$ 11.8	$ 18.3	$ 20.2
Effective tax rates (as a percent)	22.30%	27.30%	21.30%	25.50%
Unrecognized tax benefits, excluding penalties and interest	$ 6.6		$ 6.6		$ 6.6
Accrued interest and penalties related to uncertain tax positions	0.3		0.3		$ 0.2
Penalties and interest (benefit) expense relating to unrecognized tax benefits	$ 0.1	$ 0.0	$ 0.1	$ 0.0
Statutory tax rate (as a percent)			21.00%
Germany and Switzerland
Provision for Income Taxes
Change in tax rates (as a percent)			3.30%
Germany
Provision for Income Taxes
Statutory tax rate (as a percent)			30.00%
Switzerland
Provision for Income Taxes
Statutory tax rate (as a percent)			20.00%