Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Tax Disclosure [Abstract]
Income tax expense	$ 28.7	$ 15.0
Effective income tax rate	16.40%	17.40%
Tax benefit associated with stock-based compensation	$ 11.1	$ 5.1