Derivatives and Hedging Activities Derivative Fair Value Hedges (Details) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Derivatives, Fair Value [Line Items]
Hedged Liability, Fair Value Hedge	[1]	$ 2,282,003	$ 2,271,192
Advances [Member]
Derivatives, Fair Value [Line Items]
Hedged Asset, Fair Value Hedge	[1]	28,176,695	28,017,560
Hedged Asset, Active Fair Value Hedge, Cumulative Increase (Decrease)		(380,204)	(88,047)
Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease)		483	546
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease)		$ (379,721)	$ (87,501)
Hedged Asset, Statement of Financial Position [Extensible Enumeration]		Advances (includes $239,652 and $214,035 at fair value under fair value option)	Advances (includes $239,652 and $214,035 at fair value under fair value option)
Available-for-sale Securities [Member]
Derivatives, Fair Value [Line Items]
Hedged Asset, Fair Value Hedge	[1]	$ 9,105,680	$ 10,222,924
Hedged Asset, Active Fair Value Hedge, Cumulative Increase (Decrease)		(894,865)	(775,129)
Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease)		15,477	16,064
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease)		$ (879,388)	$ (759,065)
Hedged Asset, Statement of Financial Position [Extensible Enumeration]		Available-for-sale securities (amortized cost of $9,131,043 and $10,247,585 and includes $806,963 and $819,794 pledged as collateral that may be repledged)	Available-for-sale securities (amortized cost of $9,131,043 and $10,247,585 and includes $806,963 and $819,794 pledged as collateral that may be repledged)
Consolidated Obligation Bonds [Member]
Derivatives, Fair Value [Line Items]
Hedged Liability, Active Fair Value Hedge, Cumulative Increase (Decrease)		$ (18,672)	$ (2,234)
Hedged Liability, Discontinued Fair Value Hedge, Cumulative Increase (Decrease)		0	0
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)		$ (18,672)	$ (2,234)
Hedged Liability, Statement of Financial Position [Extensible Enumeration]		Bonds (includes $12,315,622 and $20,657,254 at fair value under fair value option)	Bonds (includes $12,315,622 and $20,657,254 at fair value under fair value option)

[1] Includes only the portion of amortized cost representing the hedged items in active or discontinued fair value hedging relationships. Amortized cost includes fair value hedging adjustments.