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Acquisitions - Summary of Fair Values of Assets Acquired and Liabilities Assumed (Parenthetical) (Detail) - shares
shares in Millions
 1 Months Ended
Jul. 01, 2025
Mar. 03, 2025
Oct. 01, 2024
Oct. 31, 2024
Subco Units [Member]        
Business Acquisition [Line Items]        
Number of shares issued 8.5      
Minimum [Member] | Subco Units [Member]        
Business Acquisition [Line Items]        
Business combination contigent consideration 2.8      
Maximum [Member] | Subco Units [Member]        
Business Acquisition [Line Items]        
Business combination contigent consideration 4.4      
Management Contracts [Member] | Fair Value, Inputs, Level 3        
Business Acquisition [Line Items]        
Finite-lived intangible assets acquired, useful life 8 years   8 years  
Customer Relationships [Member] | Fair Value, Inputs, Level 3        
Business Acquisition [Line Items]        
Finite-lived intangible assets acquired, useful life   8 years    
Technology-Based Intangible Assets [Member] | Fair Value, Inputs, Level 3        
Business Acquisition [Line Items]        
Finite-lived intangible assets acquired, useful life   5 years    
Investor Relationship [Member] | Fair Value, Inputs, Level 3        
Business Acquisition [Line Items]        
Finite-lived intangible assets acquired, useful life 12 years   14 years  
Trade Names [Member] | Fair Value, Inputs, Level 3        
Business Acquisition [Line Items]        
Finite-lived intangible assets acquired, useful life       10 years
Global Infrastructure Management L L C [Member] | Common Stock [Member]        
Business Acquisition [Line Items]        
Number of shares issued     6.9