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Business Combinations, Goodwill and Other Intangible Assets, Business Combinations Activity (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2024
USD ($)
acquisition
Dec. 31, 2023
USD ($)
acquisition
Dec. 31, 2022
USD ($)
Business Acquisition [Line Items]      
Payment for Contingent Consideration Liability, Total $ 7.4 $ 26.8  
Number of Businesses Acquired | acquisition 2    
Goodwill, acquired during period $ 64.0 18.7  
Finite-lived intangible assets acquired 30.2 2.1  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net (3.7) $ 2.8  
Business Acquisition, Goodwill, Expected Tax Deductible Amount $ 41.2    
Number of acquisitions subject to potential earn-out payments provisions | acquisition 13 14  
Business Combination, Contingent Consideration Arrangements, Range of OUtcomes, High, Value $ 108.0 $ 100.0  
Other Payments to Acquire Businesses   10.0  
Payments to Acquire Businesses, Net of Cash Acquired 60.9 13.6 $ 5.7
Payments to Acquire Businesses, Gross 62.3    
Goodwill 4,611.3 4,587.4 4,528.0
Goodwill Additions, net of adjustments 64.0 18.7  
Goodwill, Foreign Currency Translation Gain (Loss) (40.1) 41.3  
Identified intangibles, net of accumulated amortization 724.1 785.0  
Servicing Asset at Amortized Cost, Other than Temporary Impairments 7.7 $ 10.0  
Goodwill [Line Items]      
Equity Ownership, Excluding Consolidated Entity and Equity Method Investee, Percentage   50.00%  
Business Combination, Consideration Transferred, Other 13.5    
Business Combinations, Guaranteed Deferred Acquisition Obligation 14.7 $ 0.0 3.1
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]      
Business Acquisition [Line Items]      
Business Combination, Contingent Consideration, Liability, Current 12.0 12.0  
Business Combination, Contingent Consideration, Liability, Noncurrent 23.8 45.5  
Business Combination, Contingent Consideration, Liability $ 35.8 $ 57.5 $ 73.2