Consolidated Obligations Bonds by Call Features (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Debt Instrument [Line Items]
Total par value	$ 103,433	$ 89,188
Consolidated Obligation Bonds [Member]
Debt Instrument [Line Items]
Total par value	103,433	89,188
Noncallable or Nonputable [Member] | Consolidated Obligation Bonds [Member]
Debt Instrument [Line Items]
Total par value	47,373	37,814
Callable [Member] | Consolidated Obligation Bonds [Member]
Debt Instrument [Line Items]
Total par value	$ 56,060	$ 51,374