Advances Outstanding by Year of Contractual Maturity (Details) - USD ($) $ in Thousands		Mar. 31, 2020	Dec. 31, 2019
Federal Home Loan Bank, Advances, Maturity, Rolling Year, Par Value [Abstract]
Overdrawn demand-deposit accounts		$ 2,841	$ 5,101
Due in one year or less		25,324,147	18,972,466
Due after one year through two years		11,478,292	8,600,922
Due after two years through three years		2,653,833	2,200,019
Due after three years through four years		1,756,774	1,766,314
Due after four years through five years		2,335,849	1,726,754
Thereafter		1,364,666	1,312,311
Total par value		$ 44,916,402	$ 34,583,887
Federal Home Loan Bank, Advances, Weighted Average Interest Rate, Rolling Year [Abstract]
Overdrawn demand-deposit accounts, Weighted average rate		0.57%	2.05%
Due in one year or less, Weighted average rate		1.09%	1.96%
Due after one year through two years, Weighted average rate		1.05%	2.16%
Due after two years through three years, Weighted average rate		2.15%	2.16%
Due after three years through four years, Weighted average rate		2.44%	2.71%
Due after four years through five years, Weighted average rate		1.75%	2.15%
Thereafter, Weighted average rate		2.62%	2.68%
Total Weighted average rate		1.28%	2.10%
Premiums		$ 3,227	$ 3,397
Discounts		(41,391)	(41,744)
Fair value of bifurcated derivatives	[1]	53,783	29,983
Hedging adjustments		144,202	19,840
Total Advances	[2]	45,076,223	34,595,363
Federal Home Loan Bank Advances Receivable [Member]
Federal Home Loan Bank, Advances, Weighted Average Interest Rate, Rolling Year [Abstract]
Advances - accrued interest receivable		$ 46,400	$ 48,100

[1] At March 31, 2020, and December 31, 2019, we had certain advances with embedded features that met the requirements to be separated from the host contract and designated as stand-alone derivatives.

[2] Excludes accrued interest receivable of $46.4 million and $48.1 million at March 31, 2020, and December 31, 2019.