Consolidated Obligations CO Bonds - Outstanding By Call Features (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Schedule of Short-term and Long-term Debt [Line Items]
Total par value	$ 23,804,805	$ 25,901,315
Noncallable and nonputable [Member]
Schedule of Short-term and Long-term Debt [Line Items]
Total par value	20,954,805	20,419,315
Callable [Member]
Schedule of Short-term and Long-term Debt [Line Items]
Total par value	$ 2,850,000	$ 5,482,000