v3.26.1
Capital Retained Earnings (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Banking Regulation, Total Capital [Abstract]    
Percent of Average Balance of Outstanding Consolidated Obligations Prescribed per the Joint Capital Enhancement Agreement For Each Previous Quarter 1.00%  
Retained Earnings, Appropriated $ 1,352 $ 1,254