Income Taxes Income Taxes Details (Tax Reform) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Tax [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	35.00%
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount		$ 22.2
Foreign Earnings Repatriated		195.1
Estimated Tax Reform Repatriation Liability		$ 10.0