Consolidated Obligations Bonds (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Debt Instrument [Line Items]
Total par value	$ 103,433	$ 89,188
Federal Home Loan Bank, Consolidated Obligations, Bonds	103,417	89,249
Fixed Income Interest Rate
Debt Instrument [Line Items]
Total par value	40,936	34,962
Adjustable Interest Rate
Debt Instrument [Line Items]
Total par value	62,497	54,226
Consolidated Obligation Bonds [Member]
Debt Instrument [Line Items]
Total par value	103,433	89,188
Federal Home Loan Bank, Consolidated Obligations, Bonds	103,417	89,249
Due in one year or less	$ 52,139	$ 38,808
Due in one year or less, Weighted Average Interest Rate	3.68%	3.76%
Due after one year through two years, Weighted Average Interest Rate	3.77%	3.84%
Due after one year through two years	$ 32,900	$ 32,347
Due after two years through three years	$ 3,312	$ 3,577
Due after two years through three years, Weighted Average Interest Rate	4.02%	4.11%
Due after three years through four years	$ 3,259	$ 3,351
Due after three years through four years, Weighted Average Interest Rate	3.53%	3.71%
Due after four years through five years	$ 2,939	$ 2,399
Due after four years through five years, Weighted Average Interest Rate	3.65%	3.44%
Thereafter	$ 8,884	$ 8,706
Thereafter, Weighted Average Interest Rate	4.51%	4.52%
Total par value, Weighted Average Interest Rate	3.78%	3.87%
Premiums	$ 27	$ 28
Discounts and concessions	(22)	(23)
Fair value hedging adjustments	(21)	56
Consolidated Obligation Bonds [Member] | Earlier of Contractual Maturity or Next Call Date [Member]
Debt Instrument [Line Items]
Due in one year or less	94,314	79,984
Due after one year through two years	3,600	3,609
Due after two years through three years	2,871	2,901
Due after three years through four years	1,540	1,594
Due after four years through five years	693	685
Thereafter	$ 415	$ 415