v3.26.1
Variable interest entities and asset securitizations - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Other assets for its "investment" in the common securities recognized by the company of various trusts $ 16    
Total assets of partnerships in which the company invested 214,736   $ 213,510
Variable Interest Entity Primary Beneficiary      
Total assets of partnerships in which the company invested 10,900   $ 10,700
Federal tax credits and other federal tax benefits recognized 16 $ 9  
Investments amortized to income tax expense 49 $ 44  
Maximum exposure to loss of investments in real estate partnerships 2,300    
Variable Interest Entity Primary Beneficiary | Renewable Energy      
Federal tax credits and other federal tax benefits recognized $ 6