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Commitments, Contingencies and Off-Balance Sheet Arrangements - Additional Information (Detail)
 12 Months Ended
Dec. 31, 2024
USD ($)
ft²
Employee
LetterOfCredit
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Number of square feet | ft² 360,000    
Number of employees will accommodate at new facility | Employee 2,000    
Total rent expense $ 183,400,000 $ 183,500,000 $ 176,600,000
Aggregate amount of maximum earnout obligations related to acquisitions 1,998,200,000 2,009,800,000  
Aggregate amount of maximum earnout obligations related to acquisitions, recorded in consolidated balance sheet 1,302,000,000 1,294,200,000  
Aggregate amount of earnout obligation expected settlement in cash or common stock at option 511,900,000 564,800,000  
Aggregate amount of earnout obligation expected settlement in cash 790,100,000 $ 729,400,000  
Debt 23,000,000.0    
Liabilities recorded on self-insurance $ 12,000,000.0    
Collateral [Member]      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Number of letters of credit issued | LetterOfCredit 1    
Self-Insurance Deductibles [Member]      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Number of letters of credit issued | LetterOfCredit 2    
Rent-A-Captive Facility [Member]      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Number of letters of credit issued | LetterOfCredit 8    
Errors And Omissions [Member] | Up to $4.5 Million [Member]      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Insurance claims, amount retained $ 2,000,000.0    
Errors And Omissions [Member] | Up to $10 Million [Member]      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Insurance claims, amount retained 15,000,000.0    
Errors And Omissions [Member] | Up to $20.0 Million [Member]      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Insurance claims, amount retained 10,000,000.0    
Errors And Omissions [Member] | Up to $27.0 Million [Member]      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Insurance claims, amount retained 20,000,000.0    
Letter of Credit [Member] | Security Deposit [Member]      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Debt 800,000    
Letter of Credit [Member] | Self-Insurance Deductibles [Member]      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Debt 9,200,000    
Liabilities recorded on self-insurance 12,000,000    
Letter of Credit [Member] | Rent-A-Captive Facility [Member]      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Debt 13,000,000    
Minimum [Member] | Errors And Omissions [Member]      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Loss Contingency Accrual, Product Liability, Net, Total 10,700,000    
Minimum [Member] | Errors And Omissions [Member] | Up to $4.5 Million [Member]      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Insurance claim arise during ordinary course of business 15,000,000.0    
Minimum [Member] | Errors And Omissions [Member] | Up to $20.0 Million [Member]      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Insurance claim arise during ordinary course of business 100,000,000.0    
Minimum [Member] | Errors And Omissions [Member] | Up to $27.0 Million [Member]      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Insurance claim arise during ordinary course of business $ 225,000,000.0    
Minimum [Member] | Unconsolidated Investments in Enterprises [Member]      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Ownership interest 1.00%    
Maximum [Member] | Errors And Omissions [Member]      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Loss Contingency Accrual, Product Liability, Net, Total $ 4,400,000    
Maximum [Member] | Errors And Omissions [Member] | Up to $4.5 Million [Member]      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Insurance claim arise during ordinary course of business 100,000,000.0    
Maximum [Member] | Errors And Omissions [Member] | Up to $20.0 Million [Member]      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Insurance claim arise during ordinary course of business 225,000,000.0    
Maximum [Member] | Errors And Omissions [Member] | Up to $27.0 Million [Member]      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Insurance claim arise during ordinary course of business $ 400,000,000    
Maximum [Member] | Unconsolidated Investments in Enterprises [Member]      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Ownership interest 50.00%    
Tax Increment Financing [Member]      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Property tax credits receivable period 15 years    
Economic development for growing economy tax credit $ 62,600,000    
Tax Increment Financing [Member] | Minimum [Member]      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Property tax credit expect to receive 50,000,000    
Tax Increment Financing [Member] | Maximum [Member]      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Property tax credit expect to receive $ 80,000,000