Income Taxes - Narratives (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Tax Examination [Line Items]
Effective Income Tax Rate, Continuing Operations	28.00%	35.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	5.00%
Effective Income Tax Rate Reconciliation, Tax Contingencies	1.00%
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Percent	1.00%
Decrease in Unrecognized Tax Benefits is Reasonably Possible	$ 0.7
Income Tax Examination, Likelihood of Unfavorable Settlement	twelve
Income Taxes Paid, Net	$ 5.4	$ 20.0