Income Taxes (Narrative) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2016 USD ($)
Income Tax Disclosure [Abstract]
Gross unrecognized tax benefits, increase	$ 2.7
Increases to the amount of unrecognized tax benefits	16.1
Decrease in unrecognized tax benefits related to settlements of tax positions taken in prior years	11.3
Accrued interest on unrecognized tax benefits	$ 2.1