Income Taxes (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Effective income tax rate, continuing operations	28.20%	32.60%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Amount		$ 27.6
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	$ 11.7	3.7
Tax benefits related to restructuring expense	1.2	5.9
Tax Benefit Associated with Merger and Acquisition Expense	$ 0.3
Effective Income Tax Rate Reconciliation, Gain from customer contract expiration, Percent		$ 2.2