v3.25.2
Borrowings - Additional Information (Detail) - USD ($)
$ in Millions
1 Months Ended
Jul. 31, 2025
Jun. 30, 2025
Dec. 31, 2024
Debt Instrument [Line Items]      
Senior notes   $ 3,744 $ 3,745
FHLB of New York      
Debt Instrument [Line Items]      
Available line of credit   18,100  
FRB of New York      
Debt Instrument [Line Items]      
Available line of credit   24,700  
Five Point One Seven Nine Percentage Fixed Rate Senior Notes Due To Mature In July 2030      
Debt Instrument [Line Items]      
Senior notes   $ 750  
Debt instrument, interest rate, stated percentage   5.179%  
Variable rate   1.40%  
Four Point Seven Six Two Percentage Fixed Rate Senior Notes Due To Mature In July 2027      
Debt Instrument [Line Items]      
Senior notes   $ 750  
Debt instrument, interest rate, stated percentage   4.762%  
Variable rate   0.95%  
Five Point Four Zero Percentage Fixed Rate Senior Notes Due To Mature In July 2030 | Subsequent Event      
Debt Instrument [Line Items]      
Senior notes $ 750    
Debt instrument, interest rate, stated percentage 5.40%    
Variable rate 1.43%