Income Taxes, Provision and Effective tax rate (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Taxes
Provision for income taxes	$ (117.2)	$ (134.2)
Effective tax rate	20.90%	23.80%
Excess tax benefit from option exercises	$ 17.1	$ 3.8
Excess tax benefit, impact on effective tax rate	(3.10%)	(0.70%)