Consolidated Obligations CO Bonds - Year of Contractual Maturity or Next Call Date (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Due in one year or less	$ 9,455,725	$ 9,638,270
Due after one year through two years	6,442,960	5,375,845
Due after two years through three years	2,154,920	3,864,560
Due after three years through four years	1,319,915	1,891,975
Due after four years through five years	1,211,080	1,338,515
Thereafter	3,220,205	3,792,150
Total par value	23,804,805	25,901,315
Earlier Of Contractual Maturity Or Next Call Date [Member]
Debt Instrument [Line Items]
Due in one year or less	11,297,725	13,435,270
Due after one year through two years	6,432,960	5,602,845
Due after two years through three years	2,019,920	2,802,560
Due after three years through four years	1,332,915	1,366,975
Due after four years through five years	926,080	1,156,515
Thereafter	1,795,205	1,537,150
Total par value	$ 23,804,805	$ 25,901,315