Income Taxes, Provision and Effective tax rate (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Taxes
Provision for income taxes	$ (135.1)	$ (130.6)	$ (245.8)	$ (247.8)
Effective tax rate	20.40%	21.90%	18.50%	21.40%
Discrete tax benefit comprised of the settlement of tax audits and lapses of statutes of limitation, along with a difference in a non-U.S. tax filing position			$ 18.6
Impact on the effective tax rate associated with the discrete tax benefit comprised of the settlement of tax audits and lapses of statutes of limitation, along with a difference in a non-U.S. tax filing position.			(1.40%)
Excess tax benefit from option exercises	$ 30.9	$ 11.9	$ 60.6	$ 29.0
Excess tax benefit, impact on effective tax rate	(4.70%)	(2.00%)	(4.60%)	(2.50%)
Impact of gain associated with the bargain purchase acquisition on the effective tax rate		(0.20%)		(0.10%)
Impact of acquisition-related expenses on the effective tax rate	1.00%	0.10%	0.50%	0.10%