v3.26.1
Derivatives and Hedging Activities Cumulative Basis Adjustments for Fair Value Hedges (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Consolidated Obligation Bonds [Member]    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Hedged Liability, Fair Value Hedge $ 26,706 $ 20,546
Hedged Liability, Active Fair Value Hedge, Cumulative Increase (Decrease) (70) 56
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) (70) 56
Hedged Liability, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) 0 0
Available-for-sale Securities [Member]    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Hedged Asset, Fair Value Hedge 20,102 19,983
Hedged Asset, Active Fair Value Hedge, Cumulative Increase (Decrease) (617) (315)
Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) (40) (42)
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) (657) (357)
Advances [Member]    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Hedged Asset, Fair Value Hedge 62,503 58,516
Hedged Asset, Active Fair Value Hedge, Cumulative Increase (Decrease) (497) 82
Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) (4) (10)
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) (501) 72
Consolidated Obligation Discount Notes [Member]    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Hedged Liability, Fair Value Hedge 89,990 61,439
Hedged Liability, Active Fair Value Hedge, Cumulative Increase (Decrease) (26) 17
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) (26) 17
Hedged Liability, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) $ 0 $ 0