Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Before Income Taxes [Abstract]
Income before income taxes, Domestic	$ 696.0	$ 789.3	$ 845.9
Income before income taxes, International	1,296.9	1,156.1	1,142.9
Income Before Income Taxes and Income From Equity Method Investments	1,992.9	1,945.4	1,988.8
Income Tax Expense [Abstract]
Income tax expense, current, U.S. federal	154.2	180.1	144.0
Income tax expense, current, U.S. state and local	34.8	57.0	16.5
Income tax expense, current, International	330.8	287.4	303.9
Income tax expense, current	519.8	524.5	464.4
Income tax expense, deferred, U.S. federal	10.9	11.1	40.0
Income tax expense, deferred, U.S. state and local	1.3	(0.3)	(11.6)
Income tax expense, deferred, International	(7.1)	11.5	(4.1)
Income tax expense, deferred	5.1	22.3	24.3
Income tax expense	$ 524.9	$ 546.8	$ 488.7
Reconciliation from the Statutory U.S. Federal Income Tax Rate to Effective Tax Rate [Abstract]
Statutory U.S. federal income tax rate	21.00%	21.00%	21.00%
U.S. state and local income taxes, net of U.S. federal income tax benefit	1.40%	2.30%	0.20%
Impact of foreign operations	3.90%	3.50%	3.60%
Other, including impact of war in Ukraine	0.00%	1.30%	(0.20%)
Effective tax rate	26.30%	28.10%	24.60%
Charges arising from the effects of the war in Ukraine	$ 0.0	$ 113.4	$ 0.0
Income tax expense related to charges arising from the effects of the war in Ukraine		4.8
Tax Act, net cash liability, transition tax on accumulated foreign earnings	68.9	88.8
Income tax expense, GILTI	17.0	10.9
Deferred tax assets:
Compensation	153.8	197.6
Tax loss and credit carryforwards	78.6	77.1
Basis differences from acquisitions	41.2	31.0
Basis differences from short-term assets and liabilities	33.3	20.5
Other, net	19.5
Other, net		(18.6)
Deferred tax assets	326.4	307.6
Valuation allowance	(18.9)	(21.1)
Deferred tax assets, net	307.5	286.5
Deferred tax liabilities:
Goodwill and intangible assets	687.3	653.3
Unremitted foreign earnings	71.1	34.9
Basis differences from investments	3.8	6.9
Financial instruments	0.9	0.3
Deferred tax liabilities	763.1	695.4
Long-term deferred tax liabilities	529.1	475.7
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
January 1	167.6	162.8
Current year tax positions	3.3	2.7
Prior year tax positions	4.3	4.7
Reduction of prior year tax positions	(7.9)	(1.5)
Settlements	0.0	(0.9)
Foreign currency translation	0.5
Foreign currency translation		(0.2)
December 31	167.8	167.6	162.8
Unrecognized tax benefits that would impact effective tax rate	161.7	161.8
Unrecognized Tax Benefits, Penalties and Interest [Abstract]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	3.2	4.3	$ 2.1
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	19.9	15.9
Other Assets
Long-term deferred tax assets	$ 73.5	$ 66.8