Consolidated Obligations (Bonds by Call Features) (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Total Par Value	$ 89,188	$ 88,588
Consolidated Obligation Bonds [Member]
Debt Instrument [Line Items]
Total Par Value	89,188	88,588
Consolidated Obligation Bonds [Member] | Noncallable or Nonputable [Member]
Debt Instrument [Line Items]
Total Par Value	37,814	56,373
Consolidated Obligation Bonds [Member] | Callable [Member]
Debt Instrument [Line Items]
Total Par Value	$ 51,374	$ 32,215