XML 108 R90.htm IDEA: XBRL DOCUMENT v3.22.4
Capitalized Servicing Assets - Additional Information (Detail) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Jan. 31, 2019
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Residential Mortgage Loans [Member]        
Servicing Assets at Fair Value [Line Items]        
Mortgage loans serviced for others   $ 22,400 $ 23,200 $ 26,300
Fair value of residential loan servicing assets   $ 336 $ 257  
Weighted average discount rates used to estimate fair value of capitalized mortgaged loan servicing assets   12.29% 9.80%  
Residential Mortgage Loans [Member] | LIBOR [Member]        
Servicing Assets at Fair Value [Line Items]        
Discounted rate represented weighted-average option-adjusted basis spread point percentage   8.81% 8.94%  
Residential Mortgage Sub Servicing Loan [Member]        
Servicing Assets at Fair Value [Line Items]        
Mortgage loans serviced for others   $ 96,000 $ 74,700 68,100
Residential Real Estate [Member]        
Servicing Assets at Fair Value [Line Items]        
Fair value of residential loan servicing assets $ 1,100      
Purchase price of servicing rights $ 12      
Commercial Mortgage Loans [Member]        
Servicing Assets at Fair Value [Line Items]        
Mortgage loans serviced for others   22,200 20,200 18,900
Fair value of residential loan servicing assets   $ 156 $ 160  
Weighted average discount rates used to estimate fair value of capitalized mortgaged loan servicing assets   18.00% 18.00%  
Commercial Mortgage Sub Servicing Loan [Member]        
Servicing Assets at Fair Value [Line Items]        
Mortgage loans serviced for others   $ 3,800 $ 3,500 $ 3,300