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Investments - Other Investments - Additional Information (Detail)
Dec. 31, 2022
USD ($)
Investment
Venture
Dec. 31, 2021
USD ($)
Schedule of Equity Method Investments [Line Items]    
Non controlling interest certified low-income housing developments | Investment 5  
Liabilities $ 29,717,600,000 $ 24,784,900,000
Variable Interest Entity, Not Primary Beneficiary [Member] | Venture Capital Funds [Member]    
Schedule of Equity Method Investments [Line Items]    
Liabilities $ 400,000  
Other Investments [Member] | One Startup Venture [Member]    
Schedule of Equity Method Investments [Line Items]    
Non-controlling interest in startup venture number | Venture 1  
Assets $ 2,200,000  
Other Investments [Member] | Four Venture Capital Funds [Member]    
Schedule of Equity Method Investments [Line Items]    
Assets $ 3,400,000  
Non controlling interest in venture capital funds number | Venture 4  
Other Investments [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]    
Schedule of Equity Method Investments [Line Items]    
Assets $ 4,600,000  
Other Investments [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] | Five Certified Low-income Housing Developments [Member]    
Schedule of Equity Method Investments [Line Items]    
Carrying value of investments $ 0