Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Federal statutory income tax rate (as a percent)		35.00%
Provisional income tax		$ 14.0
Provisional tax rate effect on remeasurement		10.2
Provisional increase of one-time transition tax liability of foreign subsidiaries		8.6
Tax on foreign income		23.8
Foreign tax credit		15.2
unremitted foreign earnings		$ 4.8
Forecast
Federal statutory income tax rate (as a percent)	21.00%