Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Before Income Taxes [Abstract]
Income before income taxes, Domestic	$ 940.0	$ 696.0	$ 789.3
Income before income taxes, International	1,187.6	1,296.9	1,156.1
Income Before Income Taxes and Income From Equity Method Investments	2,127.6	1,992.9	1,945.4
Income Tax Expense [Abstract]
Income tax expense, current, U.S. federal	183.8	154.2	180.1
Income tax expense, current, U.S. state and local	46.6	34.8	57.0
Income tax expense, current, International	309.9	330.8	287.4
Income tax expense, current	540.3	519.8	524.5
Income tax expense, deferred, U.S. federal	17.5	10.9	11.1
Income tax expense, deferred, U.S. state and local	1.3	1.3	(0.3)
Income tax expense, deferred, International	1.4	(7.1)	11.5
Income tax expense, deferred	20.2	5.1	22.3
Income tax expense	$ 560.5	$ 524.9	$ 546.8
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	1.70%	1.40%	2.30%
Impact of foreign operations	3.80%	3.90%	3.50%
Other, including impact of war in Ukraine	(0.20%)	0.00%	1.30%
Effective tax rate	26.30%	26.30%	28.10%
Income taxes, impact of real estate repositioning costs and increase in U.K. statutory tax rate		$ 10.7
Income taxes, impact from the resolution of certain non-U.S. tax positions		10.0
Tax Act, net cash liability, transition tax on accumulated foreign earnings	$ 41.2	68.9
Income tax expense, GILTI	5.5	17.0
Deferred tax assets:
Compensation	136.1	153.8
Tax loss and credit carryforwards	78.2	78.6
Basis differences from acquisitions	53.2	41.2
Basis differences from short-term assets and liabilities	27.6	33.3
Capitalized research and development expenditures	106.8	64.8
Deferred tax assets	401.9	371.7
Valuation allowance	(17.0)	(18.9)
Deferred tax assets, net	384.9	352.8
Deferred tax liabilities:
Goodwill and intangible assets	707.5	687.3
Unremitted foreign earnings	44.1	71.1
Basis differences from investments	5.2	3.8
Financial instruments	0.0	0.9
Other	44.4	45.3
Deferred tax liabilities	801.2	808.4
Deferred Tax Liabilities	491.8	529.1
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
January 1	167.8	167.6
Current year tax positions	15.7	3.3
Prior year tax positions	4.4	4.3
Reduction of prior year tax positions	(2.5)	(7.9)
Settlements	(2.6)	0.0
Foreign currency translation	(1.3)
Foreign currency translation		0.5
December 31	181.5	167.8	$ 167.6
Unrecognized tax benefits that would impact effective tax rate	175.1	161.7
Unrecognized Tax Benefits, Penalties and Interest [Abstract]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	4.4	3.2	$ 4.3
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	23.5	19.9
Other Assets
Long-term deferred tax assets	$ 75.5	$ 73.5