Annual report pursuant to Section 13 and 15(d)

Income Taxes (Narrative) (Details)

v3.8.0.1
Income Taxes (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2013
Tax Credit Carryforward [Line Items]          
Statutory rate   35.00% 35.00% 35.00%  
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount   $ 66.9      
Cumulative undistributed net earnings of foreign subsidiaries included in retained earnings   (87.8)      
Adjustment to additional paid in capital, income tax effect from share-based compensation, net     $ 2.3 $ 0.1  
Liability for Uncertainty in Income Taxes, Noncurrent         $ 10.1
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense   2.0      
State and Local Jurisdiction [Member]          
Tax Credit Carryforward [Line Items]          
State net operating loss carryforwards, valuation allowance   $ 6.7 $ 3.6    
Subsequent Event [Member]          
Tax Credit Carryforward [Line Items]          
Statutory rate 21.00%