Income Taxes Tax Narrative (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Effective income tax rate reconciliation, percent	32.50%	23.60%
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities		$ 23.4
Valuation Allowance, Deferred Tax Asset, Decrease, Amount		12.2
Excess Tax Benefit from Share-based Compensation, Operating Activities		$ 10.5