XML 51 R41.htm IDEA: XBRL DOCUMENT v3.23.1
Business Combinations - Additional Information (Detail)
$ in Millions
 3 Months Ended 255 Months Ended
Dec. 20, 2022
USD ($)
Employee
Mar. 31, 2023
USD ($)
Entity
Mar. 31, 2022
USD ($)
Entity
Mar. 31, 2023
USD ($)
Entity
Business Acquisition [Line Items]        
Accretion of the discount on acquisition   $ 19.8 $ 9.4  
Income (expense) related to net adjustments to estimated fair value of liability for earnout obligations   $ (22.0) $ (11.5)  
Number of companies acquired | Entity   22 31 660
Aggregate amount of maximum earnout obligations related to acquisitions   $ 1,748.3    
Aggregate amount of maximum earnout obligations related to acquisitions, recorded in consolidated balance sheet   901.8    
Aggregate amount of earnout obligation expected settlement in cash or stock at option   524.0   $ 524.0
Aggregate amount of earnout obligation expected settlement in cash   377.8   377.8
Goodwill   181.2   181.2
Expiration lists   147.6   147.6
Non-compete agreements   6.8   6.8
Trade names   1.3   1.3
Total revenues   2,712.2 $ 2,454.2  
Brokerage Management [Member]        
Business Acquisition [Line Items]        
Goodwill   181.2   181.2
Expiration lists   147.6   147.6
Non-compete agreements   6.8   6.8
Trade names   1.3   1.3
Brokerage and Risk Management [Member]        
Business Acquisition [Line Items]        
Write-off of amortizable intangible assets   0.1 $ 0.2  
Brokerage [Member] | Expiration Lists [Member]        
Business Acquisition [Line Items]        
Business acquisition not deductible for income tax purposes   61.7   61.7
Brokerage [Member] | Non-Compete Agreements [Member]        
Business Acquisition [Line Items]        
Business acquisition not deductible for income tax purposes   6.4   6.4
Brokerage [Member] | Trade Names [Member]        
Business Acquisition [Line Items]        
Business acquisition not deductible for income tax purposes   $ 0.0   0.0
Minimum [Member] | Expiration Lists [Member]        
Business Acquisition [Line Items]        
Estimated useful lives of intangibles assets, years   2 years    
Minimum [Member] | Non-Compete Agreements [Member]        
Business Acquisition [Line Items]        
Estimated useful lives of intangibles assets, years   2 years    
Minimum [Member] | Trade Names [Member]        
Business Acquisition [Line Items]        
Estimated useful lives of intangibles assets, years   2 years    
Maximum [Member] | Expiration Lists [Member]        
Business Acquisition [Line Items]        
Estimated useful lives of intangibles assets, years   15 years    
Maximum [Member] | Non-Compete Agreements [Member]        
Business Acquisition [Line Items]        
Estimated useful lives of intangibles assets, years   6 years    
Maximum [Member] | Trade Names [Member]        
Business Acquisition [Line Items]        
Estimated useful lives of intangibles assets, years   15 years    
2023 Acquisitions [Member]        
Business Acquisition [Line Items]        
Trade names   $ 1.3   $ 1.3
2023 Acquisitions [Member] | Valuation, Market Approach [Member] | Measurement Input, Discount Rate [Member] | Minimum [Member]        
Business Acquisition [Line Items]        
Measurement input   0.050   0.050
2023 Acquisitions [Member] | Valuation, Market Approach [Member] | Measurement Input, Discount Rate [Member] | Maximum [Member]        
Business Acquisition [Line Items]        
Measurement input   0.200   0.200
2023 Acquisitions [Member] | Valuation, Income Approach | Measurement Input, Discount Rate [Member]        
Business Acquisition [Line Items]        
Measurement input   0.090   0.090
2022 Acquisitions [Member] | Valuation, Market Approach [Member] | Measurement Input, Long-term Revenue Growth Rate [Member]        
Business Acquisition [Line Items]        
Measurement input   0.030   0.030
2022 Acquisitions [Member] | Valuation, Income Approach        
Business Acquisition [Line Items]        
Attrition rate   25.50%    
2022 Acquisitions [Member] | Valuation, Income Approach | Measurement Input, Long-term Revenue Growth Rate [Member]        
Business Acquisition [Line Items]        
Measurement input   0.110   0.110
Business Acquisition [Member]        
Business Acquisition [Line Items]        
Annualized revenue of business acquisitions   $ 69.0    
Total revenues   11.7    
Net earnings   (2.2)    
Business Acquisition [Member] | Brokerage [Member]        
Business Acquisition [Line Items]        
Expiration lists   147.6   $ 147.6
Non-compete agreements   6.8   6.8
Deferred tax liability   $ 13.1   $ 13.1
BCHR Holdings, L.P [Member]        
Business Acquisition [Line Items]        
Initial gross consideration $ 660.0      
Net of agreed seller funded expenses and net working capital $ 585.0      
Number of employees | Employee 2,300      
Number of credentialed actuaries | Employee 220      
BCHR Holdings, L.P [Member] | Maximum [Member]        
Business Acquisition [Line Items]        
Business combination period of existence 100 years