Federal Home Loan Bank of Boston 10-K 17 Mar 23 2022 FY Annual report Financial data

Cover Page

Cover Page - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Feb. 28, 2023	Jun. 30, 2022
Entity Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2022
Document Transition Report	false
Entity File Number	000-51402
Entity Registrant Name	FEDERAL HOME LOAN BANK OF BOSTON
Entity Tax Identification Number	04-6002575
Entity Address, Address Line One	800 Boylston Street,
Entity Address, City or Town	Boston
Entity Address, Postal Zip Code	02199
Entity Address, State or Province	MA
City Area Code	(617)
Local Phone Number	292-9600
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		20,870,108
Amendment Flag	false
Entity Central Index Key	0001331463
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Entity Public Float			$ 0
Entity Incorporation, State or Country Code	X1
ICFR Auditor Attestation Flag	true
Entity Current Reporting Status	Yes

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2022
Audit Information [Abstract]
Auditor Name	PricewaterhouseCoopers LLP
Auditor Firm ID	238
Auditor Location	Boston, Massachusetts

Statements of Condition (audite

Statements of Condition (audited) - USD ($) shares in Thousands, $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
ASSETS
Cash and due from banks		$ 7,593	$ 204,993
Interest-bearing deposits		1,485,290	85,153
Securities purchased under agreements to resell		0	800,000
Federal funds sold		2,706,000	1,944,000
Investment securities:
Trading securities		1,507	501,867
Available-for-sale securities (amortized cost of $13,977,197 and $12,837,974 at December 31, 2022 and 2021, respectively)		13,626,916	12,895,987
Held-to-maturity securities	[1]	99,068	145,492
Total investment securities		13,727,491	13,543,346
Advances	[2]	41,599,581	12,340,020
Mortgage loans held for portfolio, net of allowance for credit losses of $1,900 and $1,700 at December 31, 2022 and 2021, respectively		2,758,429	3,120,159
Accrued interest receivable		134,268	68,360
Derivative assets, net		430,744	378,532
Other assets		48,153	60,729
Total Assets		62,897,549	32,545,292
Deposits
Interest-bearing		634,502	833,007
Non-interest-bearing		20,985	51,025
Total deposits		655,487	884,032
Consolidated obligations (COs):
Bonds		31,565,543	26,613,032
Discount notes		26,975,260	2,275,320
Total consolidated obligations		58,540,803	28,888,352
Mandatorily redeemable capital stock		10,290	13,562
Accrued interest payable		130,515	60,968
Affordable Housing Program (AHP) payable		76,622	70,503
Derivative liabilities, net		25,640	38,944
Other liabilities		42,871	57,920
Total liabilities		59,482,228	30,014,281
Commitments and contingencies (Note 16)
Capital [Abstract]
Capital stock – Class B – putable ($100 par value), 20,312 shares and 9,536 shares issued and outstanding at December 31, 2022 and 2021, respectively		2,031,178	953,638
Retained earnings:
Unrestricted		1,290,873	1,179,986
Restricted		399,695	368,420
Total retained earnings		1,690,568	1,548,406
Accumulated other comprehensive (loss) income		(306,425)	28,967
Total capital		3,415,321	2,531,011
Total Liabilities and Capital		62,897,549	32,545,292
Available-for-sale securities - amortized cost	[3]	13,977,197	12,837,974
Allowance for credit loss		$ 1,900	$ 1,700
Common Stock, Class B, putable par value per share		$ 100
Common Stock, Class B, putable shares issued		20,312	9,536
Common Stock, Class B, putable shares outstanding		20,312	9,536
Common Class B [Member]
Common Stock, Class B, putable par value per share		$ 100	$ 100
[1]Fair values of held-to-maturity securities were $98,591 and $148,068 at December 31, 2022 and 2021, respectively.[2]Excludes accrued interest receivable of $72.9 million and $16.3 million at December 31, 2022 and 2021, respectively.[3]Amortized cost of available-for-sale securities includes adjustments made to the cost basis of an investment for accretion, amortization, collection of cash, and fair-value hedge accounting adjustments. Amortized cost excludes accrued interest receivable

Statements of Condition (Parent

Statements of Condition (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Held-to-maturity fair value	$ 98,591	$ 148,068

Statements of Operations (audit

Statements of Operations (audited) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
INTEREST INCOME
Advances	$ 631,838	$ 170,003	$ 400,286
Prepayment fees on advances, net	3,309	34,019	24,028
Interest-bearing deposits	34,869	147	5,749
Securities purchased under agreements to resell	25,065	452	15,049
Federal funds sold	88,071	2,210	18,009
Investment securities:
Trading securities	585	49,809	83,627
Available-for-sale securities	354,512	73,314	63,243
Held-to-maturity securities	3,090	2,533	18,912
Total investment securities	358,187	125,656	165,782
Mortgage loans held for portfolio	85,431	93,048	124,828
Other	194	0	48
Total interest income	1,226,964	425,535	753,779
Consolidated obligations:
Bonds	591,546	210,052	374,449
Discount notes	344,370	4,476	187,743
Total consolidated obligations	935,916	214,528	562,192
Deposits	7,794	98	919
Mandatorily redeemable capital stock	474	192	221
Other borrowings	318	16	239
Total interest expense	944,502	214,834	563,571
NET INTEREST INCOME	282,462	210,701	190,208
Provision for (reduction of) credit losses	171	(1,462)	(4,358)
NET INTEREST INCOME AFTER PROVISION FOR (REDUCTION OF) CREDIT LOSSES	282,291	212,163	194,566
OTHER INCOME (LOSS)
Service fees	14,198	10,430	13,169
Litigation settlements	0	505	26,096
Loss on early extinguishment of debt	(432)	(11,903)	(14,784)
Net losses on trading securities	(360)	(46,341)	(11,936)
Net losses on derivatives	(678)	(559)	(49,674)
Realized net (loss) gain from sale of available-for-sale securities	(2)	0	30,583
Realized net gain from sale of held-to-maturity securities	20	283	47,413
Other, net	898	703	60
Total other income (loss)	13,644	(46,882)	40,927
OTHER EXPENSE
Compensation and benefits	41,879	41,804	47,800
Other operating expenses	25,034	24,229	24,286
Federal Housing Finance Agency (the FHFA)	4,771	3,960	3,797
Office of Finance	4,155	3,693	3,664
AHP voluntary contribution	5,479	4,761	1,614
JNE, HHNE and HOW subsidy expense	5,975	4,417	14,386
Other	3,910	5,217	6,310
Total other expense	91,203	88,081	101,857
INCOME BEFORE ASSESSMENTS	204,732	77,200	133,636
AHP assessments	20,521	7,739	13,386
NET INCOME	$ 184,211	$ 69,461	$ 120,250

Statements of Comprehensive Inc

Statements of Comprehensive Income (audited) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 184,211	$ 69,461	$ 120,250
Other comprehensive income:
Net unrealized (losses) gains on available-for-sale securities	(408,294)	9,445	122,490
Net noncredit portion of other-than-temporary impairment gains on held-to-maturity securities	0	0	76,036
Net unrealized gains (losses) relating to hedging activities	68,773	(1,926)	5,842
Pension and postretirement benefits	4,129	5,309	(1,257)
Total other comprehensive income (loss)	(335,392)	12,828	203,111
Comprehensive (loss) income	$ (151,181)	$ 82,289	$ 323,361

Statements of Capital (audited)

Statements of Capital (audited) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning of period	$ 2,531,011	$ 2,781,953	$ 3,145,312
Comprehensive (loss) income	(151,181)	82,289	323,361
Proceeds from issuance of capital stock	4,529,192	240,730	2,157,029
Repurchase of capital stock	(3,442,691)	(543,999)	(2,758,406)
Shares reclassified to mandatorily redeemable capital stock	(8,961)	(10,265)	(581)
Partial recovery of prior capital distribution to Financing Corporation	0	0	3,726
Cash dividends on capital stock	(42,049)	(19,697)	(80,958)
Period end	3,415,321	2,531,011	2,781,953
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning of period		(7,530)
Period end			(7,530)
Retained Earnings, Unrestricted
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning of period	1,179,986	1,130,222	1,114,337
Comprehensive (loss) income	152,936	69,461	100,647
Partial recovery of prior capital distribution to Financing Corporation			3,726
Cash dividends on capital stock	(42,049)	(19,697)	(80,958)
Period end	1,290,873	1,179,986	1,130,222
Retained Earnings, Unrestricted | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning of period		(7,530)
Period end			(7,530)
Retained Earnings, Restricted
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning of period	368,420	368,420	348,817
Comprehensive (loss) income	31,275	0	19,603
Period end	399,695	368,420	368,420
Retained Earnings, Restricted | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning of period		0
Period end			0
Retained Earnings, Total
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning of period	1,548,406	1,498,642	1,463,154
Comprehensive (loss) income	184,211	69,461	120,250
Partial recovery of prior capital distribution to Financing Corporation			3,726
Cash dividends on capital stock	(42,049)	(19,697)	(80,958)
Period end	1,690,568	1,548,406	1,498,642
Retained Earnings, Total | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning of period		(7,530)
Period end			(7,530)
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning of period	28,967	16,139	(186,972)
Comprehensive (loss) income	(335,392)	12,828	203,111
Period end	$ (306,425)	28,967	16,139
Accumulated Other Comprehensive Income (Loss) | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning of period		$ 0
Period end			$ 0
Common Class B [Member] | Capital Stock Class B - Putable
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning of period, shares	9,536	12,672	18,691
Beginning of period	$ 953,638	$ 1,267,172	$ 1,869,130
Proceeds from issuance of capital stock, shares	45,292	2,407	21,570
Proceeds from issuance of capital stock	$ 4,529,192	$ 240,730	$ 2,157,029
Repurchase of capital stock, shares	(34,427)	(5,440)	(27,584)
Repurchase of capital stock	$ (3,442,691)	$ (543,999)	$ (2,758,406)
Shares reclassified to mandatorily redeemable capital stock, shares	(89)	(103)	(5)
Shares reclassified to mandatorily redeemable capital stock	$ (8,961)	$ (10,265)	$ (581)
Period end, shares	20,312	9,536	12,672
Period end	$ 2,031,178	$ 953,638	$ 1,267,172

Statements of Cash Flows (audit

Statements of Cash Flows (audited) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
OPERATING ACTIVITIES
Net Income	$ 184,211	$ 69,461	$ 120,250
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization (accretion)	31,639	(10,076)	(14,310)
Provision for (reduction of) credit losses	171	(1,462)	(4,358)
Net change in derivatives and hedging activities	1,538,920	255,243	(206,394)
Loss on early extinguishment of debt	432	11,903	14,784
Other adjustments, net	4,815	3,061	4,399
Realized net gain (loss) from sale of available-for sale securities	2	0	(30,583)
Realized net loss from sale of held-to-maturity securities	(20)	(283)	(47,413)
Net change in:
Market value of trading securities	360	46,341	11,936
Accrued interest receivable	(65,908)	19,222	24,581
Other assets	3,737	1,845	(1,437)
Accrued interest payable	69,547	(949)	(42,560)
Other liabilities	(3,661)	(13,662)	(8,658)
Total adjustments	1,580,034	311,183	(300,013)
Net cash provided by (used in) operating activities	1,764,245	380,644	(179,763)
INVESTING ACTIVITIES
Interest-bearing deposits	(2,633,996)	(83,429)	917,422
Securities purchased under agreements to resell	800,000	(50,000)	2,750,000
Federal funds sold	(762,000)	316,000	(1,400,000)
Trading securities:
Proceeds	500,000	3,056,871	1,926,330
Purchases	0	0	(3,293,082)
Available-for-sale securities:
Proceeds	582,454	946,710	1,836,746
Purchases	(3,081,067)	(7,879,275)	0
Held-to-maturity securities:
Proceeds	47,847	62,083	538,452
Advances to members:
Repaid	525,325,900	41,915,962	250,744,528
Originated	(554,809,275)	(35,555,659)	(234,864,985)
Mortgage loans held for portfolio:
Proceeds	435,935	1,222,784	1,310,644
Purchases	(83,683)	(432,918)	(766,089)
Other investing activities, net	(209)	(922)	(756)
Net cash (used in) provided by investing activities	(33,678,094)	3,518,207	19,699,210
FINANCING ACTIVITIES
Net change in deposits	(228,545)	(204,955)	414,118
Net payments on derivatives with a financing element	125,890	31,794	(76,415)
Net proceeds from issuance of consolidated obligations:
Discount notes	208,264,181	262,647,281	100,524,378
Bonds	18,916,991	19,102,211	12,288,286
Payments for maturing and retiring consolidated obligations:
Discount notes	(183,656,942)	(273,248,389)	(115,287,723)
Bonds	(12,737,176)	(13,571,731)	(13,716,653)
Bonds transferred to other FHLBanks	0	(173,984)	(1,005,990)
Payment of financing lease	(169)	(162)	(122)
Partial recovery of prior capital distribution to Financing Corporation	0	0	3,726
Proceeds from issuance of capital stock	4,529,192	240,730	2,157,029
Payments for repurchase of capital stock	(3,442,691)	(543,999)	(2,758,406)
Payments for redemption of mandatorily redeemable capital stock	(12,233)	(2,985)	(105)
Cash dividends paid	(42,049)	(19,697)	(80,958)
Net cash provided by (used in) financing activities	31,716,449	(5,743,886)	(17,538,835)
Net (decrease) increase in cash and due from banks	(197,400)	(1,845,035)	1,980,612
Cash and due from banks at beginning of the year	204,993	2,050,028	69,416
Cash and due from banks at end of the year	7,593	204,993	2,050,028
Supplemental disclosures:
Interest paid	741,552	258,113	677,828
AHP payments	17,683	17,980	21,374
Noncash transfers of mortgage loans held for portfolio to other assets	543	368	606
Noncash lease liabilities arising from (modifying) obtaining right-of-use assets	(552)	0	173
Accounting Standards Update 2020-04 [Member]
Noncash transfer of held-to-maturity securities to available-for-sale securities with the adoption of the reference rate reform guidance (amortized cost)	$ 0	$ 0	$ 254,217

Background Information

Background Information	12 Months Ended
	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations [Text Block]	Background Information We are a federally-chartered corporation and one of 11 district Federal Home Loan Banks (the FHLBanks or the FHLBank System). The FHLBanks are government-sponsored enterprises (GSEs) that were organized under the Federal Home Loan Bank Act of 1932, as amended (FHLBank Act), to serve the public by enhancing the availability of credit for residential mortgages, targeted community development and economic growth. Each FHLBank operates in a specifically defined geographic territory, or district. We provide a readily available, competitively priced source of funds to our members and certain nonmember institutions located within the six New England states, which are Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont. Certain regulated financial institutions, including community development financial institutions (CDFIs) and insurance companies with their principal places of business in New England and engaged in residential housing finance, may apply for membership. Additionally, certain nonmember institutions (referred to as housing associates) that meet applicable legal criteria may also borrow from us. While eligible to borrow, housing associates are not eligible to become members and, therefore, are not allowed to hold capital stock. As we are a cooperative, current and former members own all of our outstanding capital stock and may receive dividends on their investment. We do not have any wholly or partially owned subsidiaries, and we do not have an equity position in any partnerships, corporations, or off-balance-sheet special-purpose entities. All members must purchase our stock as a condition of membership and as a condition of engaging in certain business activities with us. The FHFA, our primary regulator, an independent agency in the executive branch of the U.S. government, supervises and regulates the FHLBanks, Federal Home Loan Mortgage Corporation (Freddie Mac), and Federal National Mortgage Association (Fannie Mae). A purpose of the FHFA is to ensure the FHLBanks fulfill their mission by operating in a safe and sound manner, including maintenance of adequate capital and internal controls. In addition, the FHFA is responsible for ensuring that: 1) the operations and activities of each FHLBank foster liquid, efficient, competitive, and resilient national housing finance markets; 2) each FHLBank complies with the title and the rules, regulations, guidelines, and orders issued under the Housing and Economic Recovery Act (HERA) and the authorizing statutes; 3) each FHLBank carries out its statutory mission through only activities that are authorized under and consistent with HERA and the authorizing statutes, and; 4) the activities of each FHLBank and the manner in which such FHLBank is operated is consistent with the public interest. Each FHLBank is a separate legal entity with its own management, employees, and board of directors. The Office of Finance is the FHLBanks' fiscal agent and is a joint office of the FHLBanks established to facilitate the issuance and servicing of the FHLBanks' COs and to prepare the combined quarterly and annual financial reports of all the FHLBanks. As provided by the FHLBank Act, and applicable regulations, COs are backed only by the financial resources of all the FHLBanks and are our primary source of funds. Deposits, other borrowings, and the issuance of capital stock, which is principally held by our current and former members, provide other funds. We primarily use these funds to provide loans, called advances, to invest in single-family mortgage loans under the Mortgage Partnership Finance ® (MPF ® ) program, and also to fund other investments. In addition, we offer correspondent services, such as wire-transfer, securities-safekeeping, and settlement services. "Mortgage Partnership Finance", "MPF" and "MPF Xtra" are registered trademarks of the FHLBank of Chicago.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Basis of Presentation and Significant Accounting Policies [Text Block]	Summary of Significant Accounting Policies Use of Estimates These financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP). The preparation of financial statements in accordance with GAAP requires management to make subjective assumptions and estimates that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities, and the reported amounts of income and expenses. The most significant of these estimates include but are not limited to, accounting for derivatives and hedging activities, estimation of fair values, and amortization of premiums and discounts associated with prepayable mortgage-backed securities. Actual results could differ from these estimates. Correction of Error In the second quarter of 2022, we identified an accounting error related to changes in fair value of certain available-for-sale securities that are in fair-value hedge relationships. As a result of this error, cumulatively from 2019 through 2021, net income and retained earnings were understated by $5.6 million. We determined the error did not have a material effect on our financial condition, results of operations, or cash flows for the impacted periods, and a correcting adjustment was recorded in interest income from available-for-sale securities in 2022. Fair Value We determine the fair-value amounts recorded on the statement of condition and in the note disclosures for the periods presented by using available market and other pertinent information, and reflect our best judgment of appropriate valuation methods. Although we use our best judgment in estimating the fair value of these financial instruments, there are inherent limitations in any valuation technique. Therefore, these fair values may not be indicative of the amounts that would have been realized in market transactions at the reporting dates. See Note 15 — Fair Values for more information. Financial Instruments Meeting Netting Requirements We present certain financial instruments on a net basis when they are subject to a legal right of offset and all other requirements for netting are met (collectively referred to as the netting requirements). For these financial instruments, we have elected to offset our asset and liability positions, as well as cash collateral received or pledged, when we have met the netting requirements. The net exposure for these financial instruments can change on a daily basis; therefore, there may be a delay between the time this exposure change is identified and additional collateral is requested, and the time when this collateral is received or pledged. Likewise, there may be a delay for excess collateral to be returned. For derivative instruments that meet the requirements for netting, any excess cash collateral received or pledged is recognized as a derivative liability or derivative asset. See Note 8 — Derivatives and Hedging Activities for additional information regarding these agreements. Securities purchased under agreements to resell are also subject to netting requirements. Based on the fair value of the related collateral held, the securities purchased under agreements to resell were fully collateralized for the periods presented. There were no offsetting amounts related to these securities at December 31, 2022 and 2021. Interest-Bearing Deposits, Securities Purchased Under Agreements to Resell, and Federal Funds Sold We invest in interest-bearing deposits, securities purchased under agreements to resell, and federal funds sold. Interest-bearing deposits include bank notes not meeting the definition of a security. Securities purchased under agreements to resell are treated as short-term collateralized loans. Federal funds sold consist of short-term, unsecured loans transacted with counterparties that we consider to be of investment quality. These investments provide short-term liquidity and are carried at cost. Accrued interest receivable is recorded separately on the statements of condition. If applicable, an allowance for credit losses is recorded with a corresponding adjustment to the provision for credit losses. Interest-bearing deposits, securities purchased under agreements to resell, and federal funds sold are evaluated quarterly for expected credit losses if not expected to be repaid according to the contractual terms. We have not sold or repledged the collateral received on securities purchased under agreements to resell. We use the collateral maintenance provision practical expedient for securities purchased under agreements to resell. Consequently, a credit loss would be recognized if there is a collateral shortfall which we do not believe the counterparty will replenish in accordance with its contractual terms. The credit loss would be limited to the difference between the fair value of the collateral and the investment’s amortized cost. See Note 5 — Investments for details on the allowance methodologies relating to these investments. Investment Securities We classify investments as trading, available-for-sale, or held-to-maturity at the date of acquisition. Purchases and sales of securities are recorded on a trade date basis. Trading. Securities classified as trading are carried at fair value and we record changes in the fair value of these investments through other income as net unrealized (losses) gains on trading securities. FHFA regulations prohibit trading in or the speculative use of these instruments and limit the credit risks we have from these instruments. Available-for-sale. We classify certain investments that are not classified as held-to-maturity or trading as available-for-sale and carry them at fair value. Changes in fair value of available-for-sale securities not being hedged by derivatives, or in an economic hedging relationship, are recorded in other comprehensive income. For available-for-sale securities that have been hedged under fair-value hedge designations, we record the portion of the change in the fair value of the investment related to the risk being hedged in available-for-sale interest income together with the related change in the fair value of the derivative. For securities classified as available-for-sale, we evaluate individual securities for impairment on a quarterly basis by comparing the security’s fair value to its amortized cost. Accrued interest receivable is recorded separately on the statements of condition and is not included in the amortized cost basis. Impairment exists when the fair value of the investment is less than its amortized cost. If management does not intend to sell an impaired security classified as available-for-sale and it is not more likely than not that management will be required to sell the debt security, we assess whether a credit loss exists on an impaired security by considering whether there would be a shortfall in receiving all cash flows contractually due on the investment. When a shortfall is considered possible, we compare the present value of cash flows to be collected from the security with the amortized cost basis of the security. If the present value of cash flows is less than amortized cost, an allowance for credit losses is recorded with a corresponding adjustment to the provision for credit losses. The allowance is limited to the difference between the amortized cost and the fair value on the individual security and excludes uncollectible accrued interest receivable, which is measured separately. Any remaining difference between the security’s fair value and amortized cost is recorded to net unrealized gains (losses) on available-for-sale securities within other comprehensive income. If management intends to sell an impaired security classified as available-for-sale, or more likely than not will be required to sell the security before expected recovery of its amortized cost basis, any allowance for credit losses is written off and the amortized cost basis is written down to the security’s fair value at the reporting date with any incremental impairment reported in earnings as net losses on available-for-sale securities. Held-to-Maturity. Certain investments for which we have both the ability and intent to hold to maturity are classified as held-to-maturity and are carried at amortized cost, which is original cost net of periodic principal repayments and amortization of premiums and accretion of discounts using the level-yield method. Accrued interest receivable is recorded separately on the statement of condition. Certain changes in circumstances may cause us to change our intent to hold a security to maturity without calling into question our intent to hold other debt securities to maturity in the future. Thus, the sale or transfer of a held-to-maturity security due to certain changes in circumstances, such as evidence of significant deterioration in the issuer's creditworthiness or changes in regulatory requirements, is not considered to be inconsistent with its original classification. Other events that are isolated, nonrecurring, and unusual for us that could not have been reasonably anticipated may cause us to sell or transfer a held-to-maturity security without necessarily calling into question our intent to hold other debt securities to maturity. In addition, sale of a debt security that meets either of the following two conditions would not be considered inconsistent with the original classification of that security. • The sale occurs near enough to its maturity date (for example, within three months of maturity), or call date if exercise of the call is probable, that interest-rate risk is substantially eliminated as a pricing factor and the changes in market interest rates would not have a significant effect on the security's fair value; or • The sale of a security occurs after we have already collected a substantial portion (at least 85 percent) of the par value at acquisition due either to prepayments on the debt security or to scheduled payments on a debt security payable in equal installments (both principal and interest) over its term. Additionally, in 2020 we adopted a provision of the Accounting Standards Update titled Facilitation of the Effects of Reference Rate Reform on Financial Reporting which provides a one-time election to sell, transfer, or both sell and transfer debt securities classified as held-to-maturity that reference a rate affected by reference rate reform and that were classified as held-to-maturity before January 1, 2020. See Note 5 — Investments for a summary of our transfers and sales of investment securities. Held-to-maturity securities are evaluated quarterly for expected credit losses on a pool basis unless an individual assessment is deemed necessary because the securities do not possess similar risk characteristics. An allowance for credit losses is recorded with a corresponding adjustment to the provision for credit losses. The allowance for credit losses excludes uncollectible accrued interest receivable, which is measured separately. For any improvements in expected future cash flows for held-to-maturity securities with an allowance for credit losses recognized, the allowance for credit losses associated with recoveries may be derecognized up to its full amount immediately in the current period. Premiums and Discounts. We amortize premiums and accrete discounts on mortgage-backed securities (MBS) using the level-yield method over the estimated lives of the securities. This method requires a retrospective adjustment of the effective yield each time we change the estimated life, based on actual prepayments received and changes in expected prepayments, as if the new estimate had been known since the original acquisition date of the securities. We estimate prepayment speeds on each individual security using the most recent three months of historical constant prepayment rates, as available, or may subscribe to third-party data services that provide estimates of future cash flows, from which we determine expected asset lives. We amortize premiums and accrete discounts on other investments using the level-yield method to the contractual maturity of the securities. Gains and Losses on Sales. We compute gains and losses on sales of investment securities using the specific identification method and include these gains and losses in other income (loss). Advances Advances are carried at amortized cost, which is original cost net of periodic principal repayments, amortization of premiums and accretion of discounts, and fair value hedge adjustments, as discussed in Note 6 — Advances . Advances are evaluated quarterly for expected credit losses. We generally record our advances at par. However, we may record premiums or discounts on advances in the following cases: • Advances may be acquired from another FHLBank when one of our members acquires a member of another FHLBank. In these cases, we may purchase the advances from the other FHLBank at a price that results in a fair market yield for the acquired advance. • When the prepayment of an advance is followed by disbursement of a new advance and the transactions effectively represent a modification of the previous advance, the prepayment fee received is deferred and recorded as a discount to the modified advance. • When an advance is modified under our advance restructuring program and our analysis of the restructuring concludes that the transaction is an extinguishment of the prior advance rather than a modification, the deferred prepayment fee is recognized into income immediately and recorded as a premium on the new advance. • When we make an AHP advance, the present value of the variation in the cash flow caused by the difference in the interest rate between the AHP advance rate and our related cost of funds for comparable maturity funding is charged against the AHP liability and recorded as a discount on the AHP advance. • Advances issued under our Jobs for New England (JNE) and Helping to House New England (HHNE) programs have an interest rate at a significant discount to market rates. Due to the below market interest rate, we record a discount on the advance and an interest rate subsidy expense based on the present value of the variation in the cash flow caused by the difference in the interest rate between the advance rate and our related cost of funds for comparable maturity funding at the time that we transact the advance. The subsidy expenses for JNE and HHNE advances, and for our Housing Our Workforce (HOW) grant program, are recorded in JNE, HHNE and HOW subsidy expense in the statement of operations. We amortize the premiums and accrete the discounts on advances to interest income using the level-yield method. We record interest on advances to interest income as earned. Accrued interest receivable is recorded separately on the statements of condition. Prepayment Fees. We charge borrowers a prepayment fee when they prepay certain advances before the original maturity. We record prepayment fees net of hedging fair-value adjustments included in the carrying value of the advance as prepayment fees on advances, net in the interest income section of the statement of operations. Advance Modifications. In cases in which we fund a new advance concurrently with or within a short period of time of the prepayment of an existing advance by the same member, we evaluate whether the new advance meets the accounting criteria to qualify as a modification of the existing advance or whether it constitutes a new advance. We compare the present value of cash flows on the new advance with the present value of cash flows remaining on the existing advance. If there is at least a 10 percent difference in the present value of cash flows or if we conclude the difference between the advances is more than minor based on a qualitative assessment of the modifications made to the advance's original contractual terms, the advance is accounted for as a new advance. In all other instances, the new advance is accounted for as a modification. If a new advance qualifies as a modification of the existing advance, the net prepayment fee on the prepaid advance is deferred, recorded in the basis of the modified advance, and amortized to interest income over the life of the modified advance using the level-yield method. This amortization is recorded in advance interest income. If the modified advance is hedged, changes in fair value are recorded after the amortization of the basis adjustment in advance interest income. For prepaid advances that were hedged and meet the hedge-accounting requirements, we terminate the hedging relationship upon prepayment and record the prepayment fee net of the hedging fair-value adjustment in the basis of the advance as advance interest income. If we fund a new advance to a member concurrent with or within a short period of time after the prepayment of a previous advance to that member, we evaluate whether the new advance qualifies as a modification of the original hedged advance. If the new advance qualifies as a modification of the original hedged advance, the hedging fair-value adjustment and the prepayment fee are included in the carrying amount of the modified advance and are amortized in interest income over the life of the modified advance using the level-yield method. If the modified advance is also hedged and the hedge meets the hedging criteria, the modified advance is marked to fair value after the modification, and subsequent fair-value changes are recorded in advance interest income. If a new advance does not qualify as a modification of an existing advance, prepayment of the existing advance is treated as an advance termination and any prepayment fee, net of hedging adjustments, is recorded to advance interest income in the statement of operations. Commitment Fees We record commitment fees for standby letters of credit to members as deferred fee income when received, and amortize these fees on a straight-line basis to service-fees income in other income over the term of the standby letter of credit. Based upon past experience, we believe the likelihood of standby letters of credit being drawn upon is remote. See Note 16 – Commitments and Contingencies for additional information on standby letters of credit. Mortgage Loans Held for Portfolio We participate in the MPF program through which we invest in conventional, residential, fixed-rate mortgage loans (conventional mortgage loans) and government-insured or -guaranteed residential fixed-rate mortgage loans (government mortgage loans) that are purchased from participating financial institutions (see Note 7 — Mortgage Loans Held for Portfolio ). We classify our investments in mortgage loans for which we have the intent and ability to hold for the foreseeable future or until maturity or payoff as held for portfolio. As of December 31, 2022, all our investments in mortgage loans are held for portfolio. Mortgage loans held for portfolio are recorded at amortized cost, which is original cost, net of periodic principal repayments and amortization of premiums and accretion of discounts, and direct write-downs. Accrued interest receivable is recorded separately on the statements of condition. We perform a quarterly assessment of our mortgage loans held for portfolio to estimate expected credit losses. An allowance for credit losses is recorded with a corresponding adjustment to the provision for credit losses. We do not purchase mortgage loans with credit deterioration present at the time of purchase. Quarterly we measure expected credit losses on mortgage loans on a collective basis, pooling loans with similar risk characteristics. If a mortgage loan no longer shares risk characteristics with other loans, it is removed from the pool and evaluated for expected credit losses on an individual basis. When developing the allowance for credit losses, we measure the expected loss over the estimated remaining life of a mortgage loan, which also considers how our credit enhancements mitigate credit losses. If a loan is purchased at a discount, the discount does not offset the allowance for credit losses. We include estimates of expected recoveries within the allowance for credit losses. The allowance excludes uncollectible accrued interest receivable, as we write off accrued interest receivable by reversing interest income if a mortgage loan is placed on nonaccrual status. Premiums and Discounts. We compute the amortization of mortgage-loan-origination fees (premiums and discounts) as interest income using the level-yield method over the contractual term to maturity of each individual loan, which results in income recognition in a manner that is effectively proportionate to the actual repayment behavior of the underlying assets and reflects the contractual terms of the assets without regard to changes in estimated prepayments based on assumptions about future borrower behavior. Credit-Enhancement Fees. For conventional mortgage loans, participating financial institutions retain a portion of the credit risk on the loans in which we invest by providing credit-enhancement protection either through a direct liability to pay credit losses up to a specified amount or through a contractual obligation to provide supplemental mortgage insurance. Participating financial institutions are paid a credit-enhancement fee for assuming credit risk and in some instances all or a portion of the credit-enhancement fee may be performance-based. Credit-enhancement fees are paid monthly and are determined based on the remaining par value of the pertinent MPF loans. The required credit-enhancement amount varies depending on the MPF product. Credit-enhancement fees are recorded as an offset to mortgage-loan-interest income. To the extent that losses in the current month exceed performance-based credit-enhancement fees accrued, the remaining losses may be recovered from future performance-based credit-enhancement fees payable to the participating financial institution. Other Fees. We record other nonorigination fees in connection with our MPF program activities in other income. Such fees include delivery-commitment-extension fees, pair-off fees, price-adjustment fees, and counterparty fees in connection with MPF products under which we facilitate third party investment in loans (non-investment MPF products) such as with the MPF Xtra ® product. Delivery-commitment-extension fees are charged when a participating financial institution requests to extend the period of the delivery commitment beyond the original stated expiration. Pair-off fees represent a make-whole provision; they are received when the amount funded under a delivery commitment is less than a certain threshold (under-delivery) of the delivery-commitment amount. Price-adjustment fees are received when the amount funded is greater than a certain threshold (over-delivery) of the delivery-commitment amount. To the extent that pair-off fees relate to under-deliveries of loans, they are recorded in service fee income. Fees related to over-deliveries represent purchase-price adjustments to the related loans acquired and are recorded as part of the carrying value of the loan. The FHLBank of Chicago pays us a counterparty fee for the costs and expenses of marketing activities for loans originated for sale under non-investment MPF products. Mortgage-Loan Participations. We may purchase or sell participations in MPF loans from or to other FHLBanks from time to time. References to our investments in mortgage loans throughout this report include any participation interests we own. Nonaccrual Loans. We place conventional mortgage loans on nonaccrual status when the collection of interest or principal is doubtful or contractual principal or interest is 90 days or more past due. When a conventional mortgage loan is placed on nonaccrual status, accrued but uncollected interest is reversed against interest income in the current period. We generally record cash payments received on nonaccrual loans first as interest income and then as a reduction of principal as specified in the contractual agreement unless we consider the collection of the remaining principal amount due to be doubtful. If we consider the collection of the remaining principal amount to be doubtful, cash payments received are applied first solely to principal until the remaining principal amount due is expected to be collected and then as a recovery of any charge-off, if applicable, followed by recording interest income. A loan on nonaccrual status may be restored to accrual status when the collection of the contractual principal and interest is less than 90 days past due. We do not place government mortgage loans on nonaccrual status when the collection of the contractual principal or interest is 90 days or more past due because of the U.S. government guarantee of the loan and the contractual obligations of each related servicer, as more fully discussed in Note 7 – Mortgage Loans Held for Portfolio . Collateral-dependent Loans. A loan is considered collateral-dependent when the borrower is experiencing financial difficulty and repayment is expected to be substantially through the sale of the underlying collateral. A loan that is considered collateral-dependent is measured for credit loss on an individual basis based on the fair value of the underlying property less estimated selling costs, with any shortfall recognized as an allowance for credit losses or charged-off. Charge-Off Policy. A charge-off is recorded if it is estimated that the recorded investment in a loan will not be recovered. The recorded investment in a loan is the par value of the loan, adjusted for accrued interest, net deferred loan fees or costs, unamortized premiums or discounts, hedging adjustments, and direct write-downs. We evaluate whether to record a charge-off on a conventional mortgage loan upon the occurrence of a confirming event. Confirming events include, but are not limited to, the occurrence of foreclosure or notification of a claim against any of the credit-enhancements. We charge off the portion of outstanding conventional mortgage loan balances in excess of fair value of the underlying property less estimated selling costs, and adjusted for any available credit-enhancements for loans that are 180 or more days past due, when the borrower has filed for bankruptcy protection and the loan is at least 30 days past due, or when there is evidence of fraud. Troubled Debt Restructurings. We consider a troubled debt restructuring (TDR) of a financing receivable to have occurred when we grant a concession to a borrower that we would not otherwise consider for economic or legal reasons related to the borrower's financial difficulties. We place conventional mortgage loans that are deemed to be TDRs as a result of our modification program on nonaccrual when payments are 60 days or more past due. See Note 7 — Mortgage Loans Held for Portfolio for additional details on the allowance methodology. Derivatives and Hedging Activities All derivatives are recognized on the statement of condition at fair value and are reported as either derivative assets or derivative liabilities, net of cash collateral and accrued interest received from or pledged to clearing members and/or counterparties. We offset fair-value amounts recognized for derivatives and fair-value amounts recognized for the right to reclaim cash collateral (a receivable) or the obligation to return cash collateral (a payable) arising from derivatives recognized at fair value executed with the same clearing member and/or counterparty when the netting requirements have been met. If these netted amounts are positive, they are classified as an asset and, if negative, they are classified as a liability. Derivative assets and derivative liabilities reported on the statement of condition also include net accrued interest. Cash flows associated with derivatives are reflected as cash flows from operating activities in the statement of cash flows unless the derivative meets the criteria to be a financing derivative. Each derivative is designated as one of the following: • a qualifying hedge of the change in fair value of a recognized asset or liability or an unrecognized firm commitment (a fair value hedge); • a qualifying hedge of a forecasted transaction (a cash-flow hedge); or • a nonqualifying hedge of an asset or liability (an economic hedge) for asset-liability-management purposes. We utilize two derivatives clearing organizations (DCOs), for all cleared derivative transactions, Chicago Mercantile Exchange, Inc. (CME Inc.) and LCH Limited (LCH Ltd.). At both DCOs, variation margin is characterized as daily settlement payments and initial margin is considered collateral. Accounting for Fair-Value and Cash-Flow Hedges. If hedging relationships meet certain criteria, including, but not limited to, formal documentation of the hedging relationship and an expectation to be highly effective, they qualify for fair-value or cash-flow hedge accounting. For cash-flow hedges, we measure effectiveness using the hypothetical derivative method, which compares the cumulative change in fair value of the actual derivative designated as the hedging instrument to the cumulative change in fair value of a hypothetical derivative having terms that identically match the critical terms of the hedged forecasted transaction. Derivatives that are used in fair-value hedges are typically executed at the same time as the hedged items, and we designate the hedged item in a qualifying hedging relationship as of the trade date. We then record the changes in fair value of the derivative and the hedged item beginning on the trade date. Changes in the fair value of a derivative that is designated and qualifies as a fair-value hedge, along with changes in the fair value of the hedged asset or liability that are attributable to the hedged risk, are recorded in net interest income in the same line as the earnings effect of the hedged item. Changes in the fair value of a derivative that is designated and qualifies as a cash-flow hedge are recorded in other comprehensive income, a component of capital, until the hedged transaction affects earnings. Accounting for Economic Hedges. An economic hedge is defined as a derivative hedging specific or nonspecific assets, liabilities, or firm commitments that does not qualify or was not designated for fair-value or cash-flow hedge accounting, but is an acceptable hedging strategy under our risk-management policy. These economic hedging strategies also comply with FHFA regulatory requirements prohibiting speculative derivative transactions. An economic hedge introduces the potential for earnings variability caused by the changes in fair value of the derivatives that are recorded in income but not offset by corresponding changes in the fair value of the economically hedged assets, liabilities, or firm commitments. As a result, we recognize only the net interest and the change in fair value of these derivatives in other income (loss) as net gains (losses) on derivatives with no offsetting fair-value adjustments for the economically hedged assets, liabilities, or firm commitments. Accrued Interest Receivable and Payable. The differential between accrual of interest receivable and payable on derivatives designated as a fair-value hedge or as a cash-flow hedge is recognized through adjustments to the interest income or interest expense of the designated hedged investment securities, advances, COs, or other financial instruments. The differential between accrual of interest receivable and payable on economic hedges is recognized in other income (loss), along with changes in fair value of these derivatives, as net gains (losses) on derivatives. Discontinuance of Hedge Accounting. We may discontinue hedge accounting prospectively when: • we determine that the derivative is no longer highly effective in offsetting changes in the fair value or cash flows of a hedged item attributable to the hedged risk (including hedged items such as firm commitments or forecasted transactions); • the derivative and/or the hedged item expires or is sold, terminated, or exercised; • it is no longer probable that the forecasted transaction in a cash-flow hedge will occur in the originally expected period or within the following two months; • a hedged firm commitment in a fair-value hedge no longer meets the definition of a firm commitment; or • we determine that designating the derivative as a hedging instrument is no longer appropriate. If hedge accounting is discontinued because we determine that the derivative no longer qualifies as

Recently Issued and Adopted Acc

Recently Issued and Adopted Accounting Guidance	12 Months Ended
	Dec. 31, 2022
Accounting Standards Update and Change in Accounting Principle [Abstract]
New Accounting Pronouncements and Changes in Accounting Principles [Text Block]	Recently Issued and Adopted Accounting Guidance Effective Beginning in 2020 Facilitation of the Effects of Reference Rate Reform on Financial Reporting. On March 12, 2020, the Financial Accounting Standards Board (FASB) released temporary optional guidance that provides transition relief for reference rate reform. The guidance contains optional expedients and exceptions for applying GAAP to contract modifications, hedging relationships, and other transactions that reference LIBOR or a reference rate that is expected to be discontinued as a result of reference rate reform if certain criteria are met. This standard was effective upon issuance and the provisions generally can be applied prospectively as of January 1, 2020, through December 31, 2024. In addition to the optional expedients for contract modifications and hedging relationships, this update provided a one-time election to sell, transfer, or both sell and transfer debt securities classified as held-to-maturity that reference a rate affected by reference rate reform and that were classified as held-to-maturity before January 1, 2020. In 2020, we adopted the provision of this guidance which allowed a one-time election to sell, transfer, or both sell and transfer debt securities classified as held-to-maturity. See Note 5 — Investments for additional information related to these sales and transfers. In 2020, we retrospectively elected to adopt the provision of this guidance specific to the modification of interest rates used for the discounting of derivative instruments. This did not have a material effect on our financial condition, results of operations, or cash flows. The remaining provisions of this guidance are not expected to have a material effect on our financial condition, results of operations, and cash flows.

Cash and Due From Banks

Cash and Due From Banks	12 Months Ended
	Dec. 31, 2022
Cash and Due from Banks [Abstract]
Cash and Cash Equivalents Disclosure [Text Block]	Cash and Due from Banks Cash and due from banks includes cash on hand, cash items in the process of collection, compensating balances, and amounts due from correspondent banks and the Federal Reserve Bank of Boston. Compensating Balances. We maintain collected cash balances with a commercial bank in return for certain services. The related agreement contains no legal restrictions on the withdrawal of funds. The average collected cash balance was $87.2 million and $200.7 million for the years ended December 31, 2022 and 2021, respectively.

Investments

Investments	12 Months Ended
	Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]	Investments Interest-Bearing Deposits, Securities Purchased under Agreements to Resell, and Federal Funds Sold We invest in interest-bearing deposits, securities purchased under agreements to resell, and federal funds sold to provide short-term liquidity. These investments are generally transacted with counterparties that have received, or whose guarantors have received, a credit rating of triple-B or greater (investment grade) by a nationally recognized statistical rating organization (NRSRO), or the equivalent. At December 31, 2022 and 2021, none of these investments were made to counterparties or, if applicable, guaranteed by entities rated below single-A. Securities purchased under agreements to resell are short-term and are structured such that they are evaluated daily to determine if the market value of the underlying securities decreases below the market value required as collateral (i.e. subject to collateral maintenance provisions). If so, the counterparty must place an amount of additional securities as collateral or remit an equivalent amount of cash sufficient to comply with collateral maintenance provisions, generally by the next business day. Based upon the collateral held as security and collateral maintenance provisions with our counterparties, we determined that no allowance for credit losses was needed for our securities purchased under agreements to resell at December 31, 2022 and 2021. Federal funds sold are unsecured loans that are transacted on an overnight term or short-term basis. FHFA regulations include a limit on the amount of unsecured credit we may extend to a counterparty. All investments in interest-bearing deposits and federal funds sold outstanding as of December 31, 2022 and 2021, have been repaid according to the contractual terms. No allowance for credit losses was recorded for these assets at December 31, 2022 and 2021. Debt Securities We invest in debt securities, which are classified as either trading, available-for-sale, or held-to-maturity. We are prohibited by FHFA regulations from investing in certain higher-risk securities, such as equity securities and debt instruments that are not investment quality, other than certain investments targeted at low-income persons or communities, but we are not required to divest instruments that experience credit deterioration after their purchase. Trading Securities Table 5.1 - Trading Securities by Major Security Type (dollars in thousands) December 31, 2022 December 31, 2021 Corporate bonds $ 1,507 $ 1,442 U.S. Treasury obligations — 500,425 Total $ 1,507 $ 501,867 Table 5.2 - Net Gains (Losses) on Trading Securities (dollars in thousands) For the Year Ended December 31, 2022 2021 2020 Net gains (losses) on trading securities held at year end $ 65 $ (9,049) $ (8,392) Net losses on trading securities sold or matured during the year (425) (37,292) (3,544) Net losses on trading securities $ (360) $ (46,341) $ (11,936) We do not participate in speculative trading practices and typically hold these investments over a longer time horizon. Available-for-sale Securities Table 5.3 - Available-for-Sale Securities by Major Security Type (dollars in thousands) December 31, 2022 Amounts Recorded in Accumulated Other Comprehensive Income Amortized Cost (1) Unrealized Unrealized Fair U.S. Treasury obligations $ 5,732,249 $ 2,784 $ (11,471) $ 5,723,562 State housing-finance-agency obligations (HFA securities) 34,580 — (1,806) 32,774 Supranational institutions 355,767 33 (5,448) 350,352 U.S. government-owned corporations 253,490 — (26,290) 227,200 GSE 104,530 — (6,864) 97,666 6,480,616 2,817 (51,879) 6,431,554 MBS U.S. government guaranteed – single-family 18,737 — (2,589) 16,148 U.S. government guaranteed – multifamily 531,184 — (54,454) 476,730 GSE – single-family 831,304 251 (66,029) 765,526 GSE – multifamily 6,115,356 322 (178,720) 5,936,958 7,496,581 573 (301,792) 7,195,362 Total $ 13,977,197 $ 3,390 $ (353,671) $ 13,626,916 December 31, 2021 Amounts Recorded in Accumulated Other Comprehensive Income Amortized Cost (1) Unrealized Unrealized Fair U.S. Treasury obligations $ 5,081,536 $ 3,380 $ (370) $ 5,084,546 HFA securities 63,330 2 (1,067) 62,265 Supranational institutions 409,337 96 (5,668) 403,765 U.S. government-owned corporations 325,567 — (18,703) 306,864 GSE 130,143 — (3,671) 126,472 6,009,913 3,478 (29,479) 5,983,912 MBS U.S. government guaranteed – single-family 21,435 100 — 21,535 U.S. government guaranteed – multifamily 541,238 219 (52) 541,405 GSE – single-family 1,093,890 9,945 (121) 1,103,714 GSE – multifamily 5,171,498 99,119 (25,196) 5,245,421 6,828,061 109,383 (25,369) 6,912,075 Total $ 12,837,974 $ 112,861 $ (54,848) $ 12,895,987 _______________________ (1) Amortized cost of available-for-sale securities includes adjustments made to the cost basis of an investment for accretion, amortization, collection of cash, and fair-value hedge accounting adjustments. Amortized cost excludes accrued interest receivable Table 5.4 - Available-for-Sale Securities in a Continuous Unrealized Loss Position (dollars in thousands) December 31, 2022 Continuous Unrealized Loss Less than 12 Months Continuous Unrealized Loss 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized U.S. Treasury obligations $ 2,792,558 $ (7,428) $ 1,077,821 $ (4,043) $ 3,870,379 $ (11,471) HFA securities 10,383 (77) 22,391 (1,729) 32,774 (1,806) Supranational institutions — — 337,485 (5,448) 337,485 (5,448) U.S. government-owned corporations — — 227,200 (26,290) 227,200 (26,290) GSE — — 97,666 (6,864) 97,666 (6,864) 2,802,941 (7,505) 1,762,563 (44,374) 4,565,504 (51,879) MBS U.S. government guaranteed – single-family 16,148 (2,589) — — 16,148 (2,589) U.S. government guaranteed – multifamily 310,447 (36,177) 166,283 (18,277) 476,730 (54,454) GSE – single-family 657,378 (52,285) 77,892 (13,744) 735,270 (66,029) GSE – multifamily 4,516,466 (124,136) 1,210,970 (54,584) 5,727,436 (178,720) 5,500,439 (215,187) 1,455,145 (86,605) 6,955,584 (301,792) Total $ 8,303,380 $ (222,692) $ 3,217,708 $ (130,979) $ 11,521,088 $ (353,671) December 31, 2021 Continuous Unrealized Loss Less than 12 Months Continuous Unrealized Loss 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized U.S. Treasury obligations $ 1,212,443 $ (370) $ — $ — $ 1,212,443 $ (370) HFA securities — — 50,053 (1,067) 50,053 (1,067) Supranational institutions — — 389,180 (5,668) 389,180 (5,668) U.S. government-owned corporations — — 306,864 (18,703) 306,864 (18,703) GSE — — 126,472 (3,671) 126,472 (3,671) 1,212,443 (370) 872,569 (29,109) 2,085,012 (29,479) MBS U.S. government guaranteed – multifamily 187,437 (52) — — 187,437 (52) GSE – single-family 93,020 (121) — — 93,020 (121) GSE – multifamily 1,507,051 (25,196) — — 1,507,051 (25,196) 1,787,508 (25,369) — — 1,787,508 (25,369) Total $ 2,999,951 $ (25,739) $ 872,569 $ (29,109) $ 3,872,520 $ (54,848) Table 5.5 - Available-for-Sale Securities by Contractual Maturity (dollars in thousands) December 31, 2022 December 31, 2021 Year of Maturity Amortized Fair Amortized Fair Due in one year or less $ 250,015 $ 250,198 $ 27,000 $ 26,780 Due after one year through five years 5,011,292 4,998,056 1,898,894 1,898,308 Due after five years through 10 years 900,988 897,913 3,674,762 3,671,798 Due after 10 years 318,321 285,387 409,257 387,026 6,480,616 6,431,554 6,009,913 5,983,912 MBS (1) 7,496,581 7,195,362 6,828,061 6,912,075 Total $ 13,977,197 $ 13,626,916 $ 12,837,974 $ 12,895,987 _______________________ (1) MBS are not presented by contractual maturity because their expected maturities will likely differ from contractual maturities because borrowers of the underlying loans may have the right to call or prepay obligations with or without call or prepayment fees. Held-to-Maturity Securities Table 5.6 - Held-to-Maturity Securities by Major Security Type (dollars in thousands) December 31, 2022 Amortized Cost (1) Gross Unrecognized Holding Gains Gross Unrecognized Holding Losses Fair Value MBS U.S. government guaranteed – single-family $ 3,614 $ 29 $ — $ 3,643 GSE – single-family 95,454 420 (926) 94,948 Total $ 99,068 $ 449 $ (926) $ 98,591 December 31, 2021 Amortized Cost (1) Gross Unrecognized Holding Gains Gross Unrecognized Holding Losses Fair Value MBS U.S. government guaranteed – single-family $ 4,320 $ 88 $ — $ 4,408 GSE – single-family 141,172 2,605 (117) 143,660 Total $ 145,492 $ 2,693 $ (117) $ 148,068 _______________________ (1) Amortized cost of held-to-maturity securities includes adjustments made to the cost basis of an investment for accretion, amortization, and collection of cash. Amortized cost excludes accrued interest receivable Transfers and Sales of Available-for-Sale Securities and Held-to-Maturity Securities During each of the three years ended December 31, 2022, we sold held-to-maturity MBS that had less than 15 percent of the acquired par value at the time of the sale. Such sales are treated as maturities for the purposes of security classification. These sales do not impact our ability and intent to hold the remaining investments classified as held-to-maturity through their stated maturity dates. These sales were as follows: • In 2022, we sold securities with an amortized cost of $10.4 million and a realized gain of $20 thousand; • In 2021, we sold securities with an amortized cost of $5.6 million and a realized gain of $283 thousand; and • In 2020, we sold securities with an amortized cost of $133.2 million and realized a gain of $41.2 million. During 2020 we adopted a provision of the Accounting Standards Update titled Facilitation of the Effects of Reference Rate Reform on Financial Reporting which provided a one-time election to sell, transfer, or both sell and transfer debt securities classified as held-to-maturity that reference a rate affected by reference rate reform and that were classified as held-to-maturity before January 1, 2020. Upon adopting this provision, we sold certain held-to-maturity private-label MBS which had an amortized cost of $82.2 million and realized a net gain of $6.2 million. Gains and Losses on Sales. We compute gains and losses on sales of investment securities using the specific identification method and include these gains and losses in other income (loss). The following table summarizes the proceeds from sale and gains and losses on sales of securities for the years ended December 31, 2022, 2021, and 2020. Table 5.7 - Proceeds and Gains (Losses) from Sales of Investment Securities (dollars in thousands) For the Years Ended December 31, 2022 2021 2020 Available-for-Sale Securities Proceeds from sale $ 142,733 $ — $ 187,366 Amortized cost, net of allowance for credit losses 142,735 — 156,783 Gross realized gains from sale $ 124 $ — $ 30,948 Gross realized losses from sale (126) — (365) Realized net (loss) gain from sale $ (2) $ — $ 30,583 Held-to-Maturity Securities Proceeds from sale $ 10,405 $ 5,883 $ 262,850 Carrying value 10,385 5,600 176,293 Noncredit losses recorded in accumulated other comprehensive income — — 39,144 Realized net gain from sale $ 20 $ 283 $ 47,413 Allowance for Credit Losses on Available-for-Sale Securities and Held-to-Maturity Securities We evaluate available-for-sale and held-to-maturity investment securities for credit losses on a quarterly basis. Our available-for-sale and held-to-maturity securities are principally debt securities of GSE or U.S. government-owned corporations, supranational institutions, and state or local housing finance agency obligations, and MBS issued by Ginnie Mae, Freddie Mac, and Fannie Mae that are backed by single-family or multifamily mortgage loans. We only purchase investment-grade securities. At December 31, 2022 and 2021, all available-for-sale securities and held-to-maturity securities were rated single-A, or above, by an NRSRO, based on the lowest long-term credit rating for each security. We evaluate individual available-for-sale securities for impairment by comparing the security’s fair value to its amortized cost. Impairment may exist when the fair value of the investment is less than its amortized cost (i.e. in an unrealized loss position). At December 31, 2022 and 2021, certain available-for-sale securities were in an unrealized loss position. These losses are considered temporary as we expect to recover the entire amortized cost basis on these available-for-sale investment securities and we neither intend to sell these securities nor do we consider it more likely than not that we will be required to sell these securities before the anticipated recovery of each security's remaining amortized cost basis. Further, we have not experienced any material payment defaults on the instruments. We evaluate held-to-maturity securities for impairment on a collective or pooled basis unless an individual assessment is deemed necessary because the securities do not possess similar risk characteristics. We have not experienced and do not anticipate any payment defaults on these securities. Based on our assessment of the credit worthiness of the issuers or guarantors, no allowance for credit losses was recorded on available-for-sale securities or held-to-maturity securities at December 31, 2022 or 2021. Table 5.8 presents a roll-forward of the allowance for credit losses on available-for-sale securities and held-to-maturity securities for the year ended December 31, 2020. Table 5.8 - Allowance for Credit Losses on Debt Securities (dollars in thousands) For the Year Ended December 31, 2020 Available-for-Sale Held-to-Maturity Balance at beginning of year $ — $ — Adjustments for cumulative effect of change in accounting principle (1) — 5,308 Transfers 634 (634) Reduction of provision for credit losses due to sales of securities (126) (3,205) Reduction of provision for credit losses (143) (1,469) Charge-offs (365) — Balance at end of year $ — $ — _________________________ (1) We adopted new accounting guidance for the measurement of credit losses on financial instruments on January 1, 2020. Upon adoption we recorded through a cumulative effect adjustment to retained earnings an increase in the allowance for credit losses associated with held-to-maturity private-label MBS.

Advances

Advances	12 Months Ended
	Dec. 31, 2022
Advances [Abstract]
Federal Home Loan Bank, Advances [Text Block]	Advances General Terms. We offer a wide range of fixed- and variable-rate advance products with different maturities, interest rates, payment characteristics, and optionality. Advances have maturities ranging from one day to 30 years or longer with the approval of our credit committee. At December 31, 2022 and 2021, we had advances outstanding with interest rates ranging from 0.00 percent to 6.23 percent and 0.00 percent to 7.72 percent, respectively. Additionally, certain advances contain embedded interest-rate features that have met the requirements to be separated from the host contract and are recorded as stand-alone derivatives, and which we economically hedge with derivatives containing offsetting interest-rate features. Table 6.1 - Advances Outstanding by Year of Contractual Maturity (dollars in thousands) December 31, 2022 December 31, 2021 Amount Weighted Amount Weighted Overdrawn demand-deposit accounts $ 2,000 4.48 % $ 64 0.60 % Due in one year or less 24,563,604 4.26 5,064,776 0.76 Due after one year through two years 10,260,956 4.05 1,354,297 2.26 Due after two years through three years 2,034,070 2.10 1,541,076 1.64 Due after three years through four years 775,951 2.35 2,173,238 1.43 Due after four years through five years 1,775,923 3.76 1,310,971 1.07 Due after five years through fifteen years 2,377,747 2.53 871,692 2.11 Thereafter 40,525 1.41 31,591 1.33 Total par value 41,830,776 3.94 % 12,347,705 1.28 % Discounts (34,257) (34,926) Fair value of bifurcated derivatives (1) 400 11,890 Hedging adjustments (197,338) 15,351 Total (2) $ 41,599,581 $ 12,340,020 _________________________ (1) At December 31, 2022 and 2021, 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 $72.9 million and $16.3 million at December 31, 2022 and 2021, respectively. We offer advances to members and eligible nonmembers that provide the borrower the right, based upon predetermined option exercise dates, to repay the advance prior to maturity without incurring prepayment or termination fees (callable advances). We also offer certain floating-rate advances that may be contractually prepaid by the borrower on a floating-rate reset date without incurring prepayment or termination fees. Other advances may only be prepaid by paying a fee (prepayment fee) that makes us financially indifferent to the prepayment of the advance. Table 6.2 - Advances Outstanding by Year of Contractual Maturity or Next Call Date (dollars in thousands) December 31, 2022 December 31, 2021 Overdrawn demand-deposit accounts $ 2,000 $ 64 Due in one year or less 33,919,899 6,116,251 Due after one year through two years 1,718,681 1,354,297 Due after two years through three years 1,986,570 1,249,001 Due after three years through four years 711,351 2,106,238 Due after four years through five years 1,078,603 632,271 Due after five years through fifteen years 2,373,147 857,992 Thereafter 40,525 31,591 Total par value $ 41,830,776 $ 12,347,705 We currently hold putable advances that provide us with the right to require repayment prior to maturity of the advance (and thereby extinguish the advance) on predetermined exercise dates (put dates). Generally, we would exercise the put options when interest rates increase relative to contractual rates. Table 6.3 - Advances Outstanding by Year of Contractual Maturity or Next Put Date (dollars in thousands) December 31, 2022 December 31, 2021 Overdrawn demand-deposit accounts $ 2,000 $ 64 Due in one year or less 25,751,204 6,088,201 Due after one year through two years 10,525,456 908,797 Due after two years through three years 2,000,070 1,497,076 Due after three years through four years 750,951 1,709,313 Due after four years through five years 1,184,423 1,277,471 Due after five years through fifteen years 1,576,147 835,192 Thereafter 40,525 31,591 Total par value $ 41,830,776 $ 12,347,705 Table 6.4 - Advances by Current Interest Rate Terms (dollars in thousands) December 31, 2022 December 31, 2021 Fixed-rate Due in one year or less $ 24,190,034 $ 3,803,476 Due after one year 7,786,877 6,195,290 Total fixed-rate 31,976,911 9,998,766 Variable-rate Due in one year or less 375,570 1,261,364 Due after one year 9,478,295 1,087,575 Total variable-rate 9,853,865 2,348,939 Total par value $ 41,830,776 $ 12,347,705 Credit Risk Exposure and Security Terms. Our advances are primarily made to member financial institutions, including commercial banks, insurance companies, savings institutions, and credit unions. We manage our credit exposure to secured member credit products through an integrated approach that generally includes establishing a credit limit for each borrower. This approach includes an ongoing review of each borrower's financial condition, and collateral and lending policies that are intended to limit risk of loss while balancing borrowers' needs for a reliable source of funding. In addition, we lend to eligible borrowers in accordance with federal law and FHFA regulations. Specifically, we are required to obtain sufficient collateral to fully secure credit products up to the counterparty’s total outstanding credit obligations plus unused credit lines. Collateral eligible to secure new or renewed advances includes: • fully disbursed, first-mortgage loans on improved residential property (provided that the borrower is not in arrears by two or more payments), or securities representing a whole interest in such mortgages; • securities issued, insured, or guaranteed by the U.S. government or any agency thereof (including without limitation, MBS issued or guaranteed by Freddie Mac, Fannie Mae, and Ginnie Mae); • cash or deposits in a collateral account with us; and • other real-estate-related collateral acceptable to us if such collateral has a readily ascertainable value and we can perfect our security interest in the collateral. In addition, in the case of any community financial institution, as defined in accordance with the FHLBank Act, we may accept as collateral secured loans for small-business and agriculture, or securities representing a whole interest in such secured loans. Residential mortgage loans are the principal form of collateral for advances. The estimated value of the collateral pledged to secure each borrower's credit products is calculated by applying collateral discounts, or haircuts, to the market value or par value of the collateral, as applicable. We require all borrowers that pledge securities collateral to place physical possession of such securities collateral with our safekeeping agent, the borrower's approved designated agent, or the borrower's securities corporation, subject to a control agreement giving us appropriate control over such collateral. In addition, community financial institutions are eligible to use expanded statutory collateral provisions for small-business and agriculture loans. The Bank has a lien on and holds the stock of a member in the Bank as further collateral security for all indebtedness of the member to the Bank. Collateral arrangements may vary depending upon borrower credit quality, financial condition, performance, borrowing capacity, and our overall credit exposure to the borrower. We can call for additional or substitute collateral to further safeguard our security interest. We also have policies and procedures for validating the reasonableness of our collateral valuations. In addition, we perform collateral verifications based on the risk profile of the borrower and other considerations. Management believes that these policies effectively manage our credit risk from advances. We either allow the borrower to retain possession of loan collateral pledged to us while agreeing to hold such collateral for our benefit or require the borrower to specifically assign or place physical possession of such loan collateral with us or a third-party custodian under a tri-party collateral control agreement that we approve. We are provided an additional safeguard for our security interests by Section 10(e) of the FHLBank Act, which generally affords any security interest granted by a borrower to the Bank priority over the claims and rights of any other party. The exceptions to this prioritization are limited to claims that would be entitled to priority under otherwise applicable law and are held by bona fide purchasers for value or by secured parties with higher priority perfected security interests. The priority granted to our security interests under Section 10(e) of the FHLBank Act may not apply when lending to insurance company members due to the anti-preemption provision contained in the McCarran-Ferguson Act, which provides that federal law does not preempt state insurance law unless the federal law expressly regulates the business of insurance. Thus, if state law conflicts with Section 10(e) of the FHLBank Act, the protection afforded by this provision may not be available to us. However, we perfect our security interests in the collateral pledged by our members, including insurance company members, by filing Uniform Commercial Code (UCC)-1 financing statements, taking possession or control of such collateral, or taking other appropriate steps. Using a risk-based approach and taking into consideration each borrower's financial strength, we consider the types and level of collateral to be the primary indicator of credit quality on our credit products. At December 31, 2022 and 2021, we had rights to collateral, on a borrower-by-borrower basis, with an estimated value in excess of our outstanding extensions of credit. We continue to evaluate and make changes to our collateral guidelines based on market conditions. At December 31, 2022 and 2021, none of our advances were past due, on nonaccrual status, or considered impaired. In addition, there were no troubled debt restructurings related to advances during the years ended December 31, 2022 and 2021. Based upon the collateral held as security, our credit extension and collateral policies, management's credit analysis, and the repayment history on advances, we have not recorded any allowance for credit losses on our advances at December 31, 2022, and 2021. Prepayment Fees. We record prepayment fees received from borrowers on certain prepaid advances net of any associated basis adjustments related to hedging activities on those advances and net of deferred prepayment fees on advance prepayments considered to be loan modifications. Additionally, for certain advances products, the prepayment-fee provisions of the advance agreement could result in either a payment from the borrower or to the borrower when such an advance is prepaid, based upon market conditions at the time of prepayment (referred to as a symmetrical prepayment fee). Advances with a symmetrical prepayment fee provision are hedged with derivatives containing offsetting terms, so that we are financially indifferent to the borrower's decision to prepay such advances. The net amount of prepayment fees is reflected as interest income in the statement of operations. We also offer an advance restructuring program under which the prepayment fee on prepaid advances may be satisfied by the borrower's agreement to pay an interest rate on a new advance sufficient to amortize the prepayment fee by the maturity date of the new advance, rather than paying the fee in immediately available funds to us. If we conclude an advance restructuring is an extinguishment of the prior loan rather than a modification, the deferred prepayment fee is recognized into income immediately. Table 6.5 - Advances Prepayment Fees (dollars in thousands) For the Year Ended December 31, 2022 2021 2020 Prepayment fees received from borrowers $ 1,726 $ 54,537 $ 32,340 Hedging fair-value adjustments on prepaid advances 1,280 (6,356) (8,013) Net discounts (premiums) associated with prepaid advances 303 (14,162) (299) Advance prepayment fees recognized in income, net $ 3,309 $ 34,019 $ 24,028

Mortgage Loans Held for Portfol

Mortgage Loans Held for Portfolio	12 Months Ended
	Dec. 31, 2022
Receivables [Abstract]
Mortgage Loans Held for Portfolio [Text Block]	Mortgage Loans Held for Portfolio We invest in mortgage loans through the Mortgage Partnership Finance® (MPF®) program. These mortgage loans are either guaranteed or insured by federal agencies, as is the case with government mortgage loans, or are credit-enhanced, directly or indirectly, by the related entity that sold the loan (a participating financial institution), as is the case with conventional mortgage loans. All such investments are held for portfolio. The mortgage loans are typically originated and credit-enhanced by the related participating financial institution. The majority of these loans are serviced by the originating institution or an affiliate thereof. However, a portion of these loans are sold servicing-released by the participating financial institution and serviced by a third-party servicer. Table 7.1 - Mortgage Loans Held for Portfolio (dollars in thousands) December 31, 2022 December 31, 2021 Real estate Fixed-rate 15-year single-family mortgages $ 224,307 $ 278,393 Fixed-rate 20- and 30-year single-family mortgages 2,496,044 2,793,682 Premiums 40,305 48,043 Discounts (1,660) (671) Deferred derivative gains, net 1,333 2,412 Total mortgage loans held for portfolio (1) 2,760,329 3,121,859 Less: allowance for credit losses (1,900) (1,700) Total mortgage loans, net of allowance for credit losses $ 2,758,429 $ 3,120,159 ________________________ (1) Excludes accrued interest receivable Table 7.2 - Mortgage Loans Held for Portfolio by Collateral/Guarantee Type (dollars in thousands) December 31, 2022 December 31, 2021 Conventional mortgage loans $ 2,557,230 $ 2,880,354 Government mortgage loans 163,121 191,721 Total par value $ 2,720,351 $ 3,072,075 Credit-Enhancements. Our allowance for credit losses factors in the credit-enhancements associated with conventional mortgage loans under the MPF program. These credit-enhancements apply after the homeowner's equity is exhausted and can include primary and/or supplemental mortgage insurance or other kinds of credit-enhancement. The credit risk analysis of our conventional loans is performed at the individual master commitment level to determine the credit-enhancements available to recover losses on loans under each individual master commitment. The credit-enhancement amounts estimated to protect us against credit losses are determined through the use of a model. Any incurred losses that would be recovered from the credit-enhancements are not reserved as part of our allowance for loan losses. In such cases, a receivable is generally established to reflect the expected recovery from credit-enhancement arrangements. Assets delivered to us must be credit enhanced to an equivalent of a single-A-minus rated MBS. We share the risk of credit losses on our investments in mortgage loans with the related participating financial institution by structuring potential losses on these investments into layers with respect to each master commitment. We analyze the risk characteristics of our mortgage loans using a third-party model to determine the credit-enhancement amount at the time of purchase. This credit-enhancement amount is broken into two parts: the Bank's first-loss account and the participating financial institution's credit-enhancement obligation, which may be calculated based on the risk analysis to equal the difference between the amounts needed for the master commitment to have a rating equivalent to a single-A-minus rated MBS and our initial first-loss account exposure. The first-loss account represents the first layer or portion of credit losses that we absorb with respect to our investments in mortgage loans after considering the borrower's equity and primary mortgage insurance. The participating financial institution is required to cover the next layer of losses up to an agreed-upon credit-enhancement obligation amount, which may consist of a direct liability of the participating financial institution to pay credit losses up to a specified amount, a contractual obligation of a participating financial institution to provide supplemental mortgage insurance, or a combination of both. We absorb any remaining unallocated losses. Credit and special hazard losses that are not covered by the liquidation value of the real property or primary mortgage insurance are first charged to us, with a corresponding reduction of the first-loss account for that master commitment up to the amount in the first-loss account at that time. Over time, the first-loss account may cover the credit losses on a master commitment, although excessive losses might not be so covered. In that case, the excess losses would be charged to the participating financial institution's credit-enhancement amount, then to us after the participating financial institution's credit-enhancement amount has been exhausted. For loans in which we buy or sell participations from or to other FHLBanks that participate in the MPF program (MPF Banks), the amount of the first-loss account remaining to absorb losses for loans that we own is partly dependent on the percentage of our participation in such loans. Assuming losses occur on a proportional basis between loans that we own and loans owned by other MPF Banks, at December 31, 2022 and 2021, the amount of first-loss account remaining for losses allocable to us was $31.6 million and $31.9 million, respectively. Participating financial institutions are paid a credit-enhancement fee for assuming credit risk and in some instances all or a portion of the credit-enhancement fee may be performance based. For certain MPF products, our losses incurred under the first-loss account can be mitigated by withholding future performance-based credit-enhancement fees that would otherwise be payable to the participating financial institutions. We record credit-enhancement fees paid to participating financial institutions as a reduction to mortgage-loan-interest income. Withheld performance-based credit-enhancement fees can mitigate losses from our investments in mortgage loans and therefore we consider our expectations for each master commitment for such withheld fees in determining the allowance for loan losses. More specifically, we determine the amount of credit-enhancement fees available to mitigate losses as follows: accrued credit-enhancement fees to be paid to participating financial institutions; plus projected credit-enhancement fees to be paid to the participating financial institutions using the weighted average life of the loans within each relevant master commitment; minus any losses incurred or expected to be incurred. Payment Status of Mortgage Loans. Payment status is a key credit quality indicator for conventional mortgage loans and allows us to monitor borrower performance. A past due loan is one where the borrower has failed to make a full payment of principal and interest within 30 days of its due date. Other delinquency statistics include nonaccrual loans and loans in process of foreclosure. Tables 7.3 and 7.4 present the payment status for conventional mortgage loans and other delinquency statistics for all mortgage loans at December 31, 2022 and 2021. Table 7.3 - Credit Quality Indicator for Conventional Mortgage Loans (dollars in thousands) December 31, 2022 Year of Origination Payment Status at Amortized Cost (1) Prior to 2018 2018 to 2022 Total Past due 30-59 days delinquent $ 9,640 $ 9,274 $ 18,914 Past due 60-89 days delinquent 2,844 1,554 4,398 Past due 90 days or more delinquent 9,638 5,444 15,082 Total past due 22,122 16,272 38,394 Total current loans 1,161,468 1,394,290 2,555,758 Total conventional mortgage loans $ 1,183,590 $ 1,410,562 $ 2,594,152 December 31, 2021 Year of Origination Payment Status at Amortized Cost (1) Prior to 2017 2017 to 2021 Total Past due 30-59 days delinquent $ 7,719 $ 8,053 $ 15,772 Past due 60-89 days delinquent 3,312 2,660 5,972 Past due 90 days or more delinquent 11,932 9,196 21,128 Total past due 22,963 19,909 42,872 Total current loans 1,153,115 1,730,438 2,883,553 Total conventional mortgage loans $ 1,176,078 $ 1,750,347 $ 2,926,425 _________________________ (1) Amortized cost excludes accrued interest receivable. Table 7.4 - Other Delinquency Statistics of Mortgage Loans (dollars in thousands) December 31, 2022 Amortized Cost in Conventional Mortgage Loans Amortized Cost in Government Mortgage Loans Total In process of foreclosure (1) $ 2,898 $ 891 $ 3,789 Serious delinquency rate (2) 0.58 % 1.42 % 0.63 % Past due 90 days or more still accruing interest $ — $ 2,359 $ 2,359 Loans on nonaccrual status (3) $ 15,246 $ — $ 15,246 December 31, 2021 Amortized Cost in Conventional Mortgage Loans Amortized Cost in Government Mortgage Loans Total In process of foreclosure (1) $ 786 $ 935 $ 1,721 Serious delinquency rate (2) 0.74 % 2.24 % 0.83 % Past due 90 days or more still accruing interest $ — $ 4,383 $ 4,383 Loans on nonaccrual status (3) $ 21,529 $ — $ 21,529 _______________________ (1) Includes loans where the decision of foreclosure or similar alternative such as pursuit of deed-in-lieu of foreclosure has been reported. (2) Loans that are 90 days or more past due or in the process of foreclosure expressed as a percentage of the recorded investment in the total loan portfolio class. (3) As of December 31, 2022 and 2021, $8.7 million and $11.8 million, respectively, of conventional mortgage loans on nonaccrual status did not have an associated allowance for credit losses because either these loans were charged off or the fair value of the underlying collateral, including any credit enhancements, is greater than the amortized cost of the loans. Allowance for Credit Losses for Mortgage Loans. Conventional Mortgage Loans. Conventional loans are evaluated collectively when similar risk characteristics exist. Conventional loans that do not share risk characteristics with other loans are evaluated for expected credit losses on an individual basis. We determine our allowance for credit losses on conventional loans through analyses that include consideration of various loan portfolio and collateral-related characteristics, such as past performance, current conditions, and reasonable and supportable forecasts of expected economic conditions. We use a discounted cash flow model to project our expected losses. We use a third-party model to project cash flows to estimate the expected credit losses over the life of the loans. The model relies on a number of inputs, such as both current and forecasted property values and interest rates as well as historical borrower behavior. We incorporate associated credit enhancements and expected recoveries, if any, to determine our estimate of expected credit losses. Certain conventional loans may be evaluated for credit losses by using the practical expedient for collateral dependent assets. A mortgage loan is considered collateral dependent when the borrower is experiencing financial difficulty and repayment is expected to be substantially through the sale of the underlying collateral. We estimate the fair value of this collateral by using a third-party property valuation model. The expected credit loss of a collateral dependent mortgage loan is equal to the difference between the amortized cost of the loan and the estimated fair value of the collateral, less estimated selling costs. We will reserve for these estimated losses or record a direct charge-off of the loan balance if certain triggering criteria are met. Table 7.5 presents a roll forward of the allowance for credit losses on conventional mortgage loans for the years ended December 31, 2022, 2021, and 2020. Table 7.5 - Allowance for Credit Losses on Conventional Mortgage Loans (dollars in thousands) 2022 2021 2020 Allowance for credit losses (1) Balance, beginning of year $ 1,700 $ 3,100 $ 500 Adjustment for cumulative effect of change in accounting principle — — 2,221 Recoveries (charge-offs) 29 62 (207) Provision for (reduction of) credit losses 171 (1,462) 586 Balance, end of year $ 1,900 $ 1,700 $ 3,100 _________________________ (1) These amounts exclude government mortgage loans because we make no allowance for credit losses based on our investments in government mortgage loans, as discussed below under — Government Mortgage Loans Held for Portfolio. Government Mortgage Loans Held for Portfolio. We invest in government mortgage loans secured by one- to four-family residential properties. Government mortgage loans are mortgage loans insured or guaranteed by the Federal Housing Administration (the FHA), the U.S. Department of Veterans Affairs (the VA), the Rural Housing Service of the U.S. Department of Agriculture (RHS), or by the U.S. Department of Housing and Urban Development (HUD). The servicer provides and maintains insurance or a guarantee from the applicable government agency. The servicer is responsible for compliance with all government agency requirements and for obtaining the benefit of the applicable insurance or guaranty with respect to defaulted government-guaranteed mortgage loans. Any losses incurred on these loans that are not recovered from the insurer or guarantor are absorbed by the related servicer. Therefore, we only have credit risk for these loans if the servicer fails to pay for losses not covered by insurance or guarantees, but in such instances we would have recourse against the servicer for such failure. Due to government guarantees or insurance on our government loans, there is no allowance for credit losses for the government mortgage loan portfolio as of December 31, 2022 and 2021. Additionally, government mortgage loans are not placed on nonaccrual status due to the government guarantee or insurance on these loans and the contractual obligation of the loan servicers to repurchase their related loans when certain criteria are met. Troubled Debt Restructurings. At December 31, 2022 and 2021, the recorded investments of mortgage loans classified as troubled debt restructurings were $9.1 million and $8.0 million, respectively.

Derivatives and Hedging Activit

Derivatives and Hedging Activities	12 Months Ended
	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Activities [Text Block]	Derivatives and Hedging ActivitiesNature of Business Activity We are exposed to interest-rate risk primarily from the effects of interest-rate changes on interest-earning assets and interest-bearing liabilities that finance these assets. The goal of our interest-rate risk-management strategy is to manage interest-rate risk within appropriate limits. As part of our effort to mitigate the risk of loss, we have established policies and procedures, which include guidelines on the amount of exposure to interest-rate changes we will accept. In addition, we monitor the risk to our interest income, net interest margin, and average maturity of interest-earning assets and interest-bearing liabilities. Consistent with FHFA regulations, we enter into derivatives to manage the interest-rate-risk exposures inherent in otherwise unhedged assets and liabilities and achieve our risk-management objectives. FHFA regulation prohibits us from the speculative use of these derivative instruments. The use of derivatives is an integral part of our financial and risk management strategy. We may enter into derivatives that do not qualify for hedge accounting provided that we document a non-speculative use. We reevaluate our hedging strategies periodically and may change the hedging techniques we use or may adopt new strategies. The most common ways in which we use derivatives are to: • effectively change the coupon repricing characteristics of assets and liabilities from fixed-rate to floating-rate; • hedge the mark-to-market sensitivity of existing assets or liabilities; • offset or neutralize embedded options in assets and liabilities; and • hedge the potential yield variability of anticipated asset or liability transactions. Application of Derivatives We formally document at inception all relationships between derivatives designated as hedging instruments and hedged items, as well as our risk-management objectives and strategies for undertaking various hedge transactions and our method of assessing hedge effectiveness for all derivatives designated in an accounting hedge relationship. This process includes linking all derivatives that are designated as fair-value or cash-flow hedges to specific assets or liabilities on the statement of condition, firm commitments, or forecasted transactions. We may use derivatives to adjust the effective maturity, repricing frequency, or option characteristics of our financial instruments, including our advances products, investments, and COs to achieve risk-management objectives. Derivative instruments are designated by us as: • a qualifying fair-value hedge of a non-derivative financial instrument or a cash-flow hedge of a forecasted transaction; and • a non-qualifying economic hedge in general asset-liability management where derivatives serve a documented risk-mitigation purpose but do not qualify for hedge accounting. These hedges are primarily used to manage certain mismatches between the coupon features of our assets and liabilities. We transact all of our derivatives with counterparties who are major banks or securities firms, and in a few instances, with their affiliates with unconditional guarantees provided by the respective major bank or securities firm. Some of these derivative counterparties and their affiliates buy, sell, and distribute COs. Derivative transactions may be either over-the-counter with a counterparty (uncleared derivatives) or cleared through a futures commission merchant (clearing member) with a DCO as the counterparty (cleared derivatives). We are not a derivatives dealer and do not trade derivatives for short-term profit. Types of Derivatives We primarily use the following derivatives instruments to reduce funding costs and/or to manage our interest-rate risks: • Interest-Rate Swaps. An interest-rate swap is an agreement between two entities to exchange cash flows in the future. The agreement sets the dates on which the cash flows will be exchanged and the manner in which the cash flows will be calculated. One of the simplest forms of an interest-rate swap involves the promise by one party to pay cash flows equivalent to the interest on a notional amount at a predetermined fixed rate for a given period of time to the counterparty. In return for this promise, this party receives cash flows equivalent to the interest on the same notional amount at a variable-rate index for the same period of time from the counterparty. The variable-rate indices on our outstanding derivative transactions are either LIBOR, the overnight-index swap rate based on the federal funds effective rate (OIS), or the overnight-index swap rate based on the Secured Overnight Financing Rate (SOFR). • Optional Termination Interest-Rate Swaps. In an optional termination interest-rate swap, one counterparty has the right, but not the obligation, to terminate the interest-rate swap prior to its stated maturity date. We use optional termination interest-rate swaps to hedge callable CO bonds and putable advances. In most cases, we own an option to terminate the hedged item, that is, redeem a callable bond or demand repayment of a putable advance on specified dates, and the counterparty to the optional termination interest-rate swap owns the option to terminate the interest-rate swap on those same dates. • Forward-Start Interest-Rate Swaps. A forward-start interest-rate swap is an interest-rate swap (as described above) with a deferred effective date. We designate forward-start interest-rate swaps as cash-flow hedges of expected debt issuances. • Interest-Rate Cap and Floor Agreements. In an interest-rate cap agreement, a cash flow is generated if the price or rate of an underlying variable rises above a certain threshold or cap price. In an interest-rate floor agreement, a cash flow is generated if the price or rate of an underlying variable falls below a certain threshold or floor price. These agreements are intended to serve as protection against the interest rate on a variable-rate asset or liability falling below or rising above a certain level. Types of Assets and Liabilities Hedged Investments. We use derivatives to manage the interest-rate and prepayment risk associated with certain investment securities that are classified either as available-for-sale or as trading securities. We may also manage the risk arising from changing market prices or cash flows of certain investment securities classified as trading securities by entering into economic hedges that offset the changes in fair value or cash flows of the securities. These economic hedges are not specifically designated as hedges of individual assets, but rather are collectively managed to provide an offset to the changes in the fair values of the assets. The market-value changes of trading securities are included in net unrealized losses on trading securities in the statement of operations, while the changes in fair value of the associated derivatives are included in other income as net losses on derivatives. Advances. We offer a wide range of fixed- and variable-rate advance products with different maturities, interest rates, payment characteristics and optionality. We may use interest-rate swaps to manage the repricing and/or options characteristics of advances to more closely match the characteristics of our funding liabilities. Typically, we hedge the fair value of fixed-rate advances with interest-rate swaps where we pay a fixed-rate coupon and receive a variable-rate coupon, effectively converting the advance to a floating-rate advance. We also hedge the fair value of certain floating-rate advances that contain either an interest-rate cap or floor, or both a cap and a floor, with a derivative containing an offsetting cap and/or floor. With each issuance of a putable advance, we effectively purchase from the borrower an embedded put option that enables us to terminate a fixed-rate advance on predetermined put dates, and offer, subject to certain conditions, replacement funding at then-current advances rates. We may hedge a putable advance by entering into a derivative that is cancelable by the derivative counterparty, where we pay a fixed-rate coupon and receive a variable-rate coupon. This type of hedge is treated as a fair-value hedge. The swap counterparty would normally exercise its option to cancel the derivative at par on any defined exercise date if interest rates had risen, and at that time, we could, at our option, require immediate repayment of the advance. Additionally, the borrower's option to prepay an advance can create interest-rate risk. When a borrower prepays an advance, we could suffer lower future income if the principal portion of the prepaid advance were invested in lower-yielding assets that continue to be funded by higher-cost debt. To protect against this risk, we generally charge a prepayment fee that makes us financially indifferent to a borrower's decision to prepay an advance. If the advance is hedged with a derivative instrument, the prepayment fee will generally offset the cost of terminating the designated hedge. When we offer advances that a borrower may prepay without a prepayment fee (other than floating-rate advances that may be prepaid on a floating-rate reset date without a prepayment fee), we usually finance such advances with callable debt or with an interest-rate swap cancellable by us. COs. We may enter into derivatives to hedge (or partially hedge, depending on the risk strategy) the interest-rate risk associated with our specific debt issuances, including using derivatives to change the effective interest-rate sensitivity of debt to better match the characteristics of funded assets. We endeavor to manage the risk arising from changing market prices and volatility of a CO by matching the cash inflow on the derivative with the cash outflow on the CO. As an example of such a hedging strategy, when fixed-rate COs are issued, we may simultaneously enter into a matching derivative in which we receive a fixed-interest cash flows designed to mirror in timing and amount the interest cash outflows we pay on the CO. At the same time, we may pay variable cash flows that closely match the interest payments we receive on short-term or variable-rate assets. In some cases, the hedged CO may have a nonstatic coupon that is subject to fair-value risk and that is matched by the receivable coupon on the hedging interest-rate swap. These transactions are treated as fair-value hedges. In a typical cash-flow hedge of anticipated CO issuance, we may enter into interest-rate swaps to hedge the cost of anticipated future issuance of fixed-rate CO bonds against potential rising interest rates. The interest-rate swap is terminated upon issuance of the fixed-rate CO bond. Changes in fair value of the hedging derivative, to the extent that the hedge is effective, will be recorded in accumulated other comprehensive income and reclassified into earnings in the period or periods during which the cash flows of the fixed-rate CO bond affects earnings (beginning upon issuance and continuing over the life of the CO bond). Firm Commitments. Mortgage loan purchase commitments are considered derivatives. When the mortgage loan purchase commitment derivative settles, the current market value of the commitment is included in the basis of the mortgage loan. The basis adjustments on the resulting performing loans are then amortized into net interest income over the life of the loans. We may also hedge a firm commitment for a forward-starting CO bond through the use of an interest-rate swap. In this case, the interest-rate swap functions as the hedging instrument for both the firm commitment and the subsequent CO bond and is treated as a fair value hedge. The fair-value change associated with the firm commitment is recorded as a basis adjustment of the CO bond at the time the commitment is terminated and the CO bond is issued. The basis adjustment is then amortized into interest expense over the life of the CO bond. Financial Statement Impact and Additional Financial Information. The notional amount of derivatives is a factor in determining periodic interest payments or cash flows received and paid. However, the notional amount of derivatives reflects our involvement in the various classes of financial instruments and represents neither the actual amounts exchanged nor our overall exposure to credit and market risk; the overall risk is much smaller. The risks of derivatives can be measured meaningfully on a portfolio basis that takes into account the counterparties, the types of derivatives, the tenor of the derivatives, the items being hedged, and any offsets between the derivatives and the items being hedged. Table 8.1 - Fair Value of Derivative Instruments (dollars in thousands) December 31, 2022 December 31, 2021 Notional Derivative Derivative Notional Derivative Derivative Derivatives designated as hedging instruments Interest-rate swaps $ 38,356,160 $ 47,000 $ (1,394,051) $ 26,589,956 $ 362 $ (163,457) Forward-start interest-rate swaps 1,391,000 756 (40) 1,391,000 48 (428) Total derivatives designated as hedging instruments 39,747,160 47,756 (1,394,091) 27,980,956 410 (163,885) Derivatives not designated as hedging instruments Interest-rate swaps 107,000 1 (226) 900,425 3,440 (13,663) CO bond firm commitments 35,000 50 — 55,000 54 (30) Mortgage-delivery commitments (1) 3,454 47 (2) 3,164 68 — Total derivatives not designated as hedging instruments 145,454 98 (228) 958,589 3,562 (13,693) Total notional amount of derivatives $ 39,892,614 $ 28,939,545 Total derivatives before netting and collateral adjustments 47,854 (1,394,319) 3,972 (177,578) Netting adjustments and cash collateral, including related accrued interest (2) 382,890 1,368,679 374,560 138,634 Derivative assets and derivative liabilities $ 430,744 $ (25,640) $ 378,532 $ (38,944) _______________________ (1) Mortgage-delivery commitments are classified as derivatives with changes in fair value recorded in other income. (2) Amounts represent the effect of master-netting agreements intended to allow us to settle positive and negative positions with the same counterparty. Cash collateral posted, including accrued interest, was $1.8 billion and $513.2 million at December 31, 2022, and 2021, respectively. The change in cash collateral posted is included in the net change in interest-bearing deposits in the statement of cash flows. Tables 8.2 presents the net gains (losses) on qualifying fair-value hedging relationships. Gains (losses) on derivatives include unrealized changes in fair value as well as net interest settlements. Table 8.2 - Net Gains (Losses) on Fair Value Hedging Relationships (dollars in thousands) For the Year Ended December 31, 2022 Advances Available-for-sale Securities CO Bonds Total interest income (expense) in the statements of operations $ 631,838 $ 354,512 $ (591,546) Gains (losses) on hedging relationships Changes in fair value: Derivatives $ 209,234 $ 1,438,662 $ (1,206,071) Hedged items (206,017) (1,397,528) 1,207,056 Net changes in fair value before price alignment interest 3,217 41,134 985 Price alignment interest (1) (2,285) (12,540) 391 Net interest settlements on derivatives (2)(3) 7,704 33,981 (114,582) Net gains (losses) on qualifying hedging relationships 8,636 62,575 (113,206) Amortization/accretion of discontinued hedging relationships (990) — 2,045 Net gains (losses) on derivatives and hedging activities recorded in net interest income $ 7,646 $ 62,575 $ (111,161) For the Year Ended December 31, 2021 Advances Available-for-sale Securities CO Bonds Total interest income (expense) in the statements of operations $ 170,003 $ 73,314 $ (210,052) Gains (losses) on hedging relationships Changes in fair value: Derivatives $ 85,265 $ 280,707 $ (197,016) Hedged items (84,296) (273,132) 197,116 Net changes in fair value before price alignment interest 969 7,575 100 Price alignment interest (1) 20 66 (4) Net interest settlements on derivatives (2)(3) (60,285) (120,524) 67,028 Net (losses) gains on qualifying hedging relationships (59,296) (112,883) 67,124 Amortization/accretion of discontinued hedging relationships (2,064) — 2,804 Net (losses) gains on derivatives and hedging activities recorded in net interest income $ (61,360) $ (112,883) $ 69,928 For the Year Ended December 31, 2020 Advances Available-for-sale Securities CO Bonds Total interest income (expense) in the statements of operations $ 400,286 $ 63,243 $ (374,449) Gains (losses) on hedging relationships Changes in fair value: Derivatives $ (82,885) $ (270,047) $ 25,811 Hedged items 81,859 263,226 (27,353) Net changes in fair value before price alignment interest (1,026) (6,821) (1,542) Price alignment interest (1) 484 1,373 (204) Net interest settlements on derivatives (2)(3) (53,615) (70,317) 23,843 Net (losses) gains on qualifying hedging relationships (54,157) (75,765) 22,097 Amortization/accretion of discontinued hedging relationships (1,937) — 3,322 Net (losses) gains on derivatives and hedging activities recorded in net interest income $ (56,094) $ (75,765) $ 25,419 _______________________ (1) Relates to derivatives for which variation margin payments are characterized as daily settled contracts. (2) Represents interest income/expense on derivatives in qualifying fair-value hedging relationships. Net interest settlements on derivatives that are not in qualifying fair-value hedging relationships are reported in other income. (3) Excludes the interest income/expense of the respective hedged items recorded in net interest income. Tables 8.3 presents the net gains (losses) on qualifying cash flow hedging relationships. Table 8.3 - Net Gains (Losses) on Cash Flow Hedging Relationships (dollars in thousands) For the Year Ended December 31, 2022 2021 2020 Forward-start interest rate swaps - CO Bonds Losses reclassified from accumulated other comprehensive loss into interest expense $ (5,539) $ (5,949) $ (7,029) Gains (losses) recognized in other comprehensive income 63,235 (7,875) (1,187) For the years ended December 31, 2022, 2021, and 2020, there were no reclassifications from accumulated other comprehensive income into earnings as a result of the discontinuance of cash-flow hedges because the original forecasted transactions were not expected to occur by the end of the originally specified time period or within a two-month period thereafter. As of December 31, 2022, the maximum length of time over which we are hedging our exposure to the variability in future cash flows for forecasted transactions is nine years. As of December 31, 2022, the amount of deferred net losses on derivatives accumulated in other comprehensive income related to cash flow hedges expected to be reclassified to earnings during the next 12 months is $4.4 million. Table 8.4 - Cumulative Basis Adjustments for Fair-Value Hedges (dollars in thousands) December 31, 2022 Line Item in Statement of Condition Amortized Cost of Hedged Asset/ Liability (1) Basis Adjustments for Active Hedging Relationships Included in Amortized Cost Basis Adjustments for Discontinued Hedging Relationships Included in Amortized Cost Cumulative Amount of Fair Value Hedging Basis Adjustments Advances $ 3,855,472 $ (199,540) $ 2,202 $ (197,338) Available-for-sale securities 11,288,325 (1,190,434) — (1,190,434) Consolidated obligation bonds 20,338,009 (1,382,685) 29,504 (1,353,181) _______________________ (1) Includes only the amortized cost of hedged items in fair-value hedging relationships. Table 8.5 - Net Gains and Losses on Derivatives and Hedging Activities (dollars in thousands) For the Year Ended December 31, 2022 2021 2020 Derivatives not designated as hedging instruments: Economic hedges: Interest-rate swaps $ (530) $ (2,183) $ (51,187) CO Bond firm commitments 520 1,734 — Mortgage-delivery commitments (668) (118) 1,405 Total net losses related to derivatives not designated as hedging instruments (678) (567) (49,782) Other (1) — 8 108 Net losses on derivatives and hedging activities $ (678) $ (559) $ (49,674) ______________________ (1) Consists of price alignment amount on derivatives for which variation margin is characterized as a daily settlement amount. Impacts on Statement of Cash Flows. Cash paid or received for cleared derivatives variation margin is included on the statement of cash flows in either net change in derivatives and hedging activities as an operating activity or net payments on derivatives with a financing element, as a financing activity. The table below shows the impact of variation margin for cleared derivatives on the statement of cash flows: Table 8.6 - Impact of Variation Margin for Cleared Derivatives on the Statement of Cash Flows (dollars in thousands) Increase (decrease) on Cash Flow Statement For the Year Ended December 31, 2022 2021 2020 Operating activity - net change in derivatives and hedging activities $ 1,633,293 $ 257,727 $ (321,862) Financing activity - net payments on derivatives with a financing element 161,289 69,021 (53,832) Total variation margin received (posted) on cleared derivatives $ 1,794,582 $ 326,748 $ (375,694) Managing Credit Risk on Derivatives. We are subject to credit risk on our hedging activities due to the risk of nonperformance by nonmember counterparties (including DCOs and their clearing members acting as agent to the DCOs as well as uncleared counterparties) to the derivative agreements. We manage credit risk through credit analysis, collateral requirements and adherence to the requirements set forth in our policies, U.S. Commodity Futures Trading Commission (the CFTC) regulations, and FHFA regulations. Uncleared Derivatives. All counterparties must execute master-netting agreements prior to entering into any uncleared derivative with us. Our master-netting agreements for uncleared derivatives contain bilateral-collateral exchange agreements that require that credit exposure be secured by readily marketable, U.S. Treasury, U.S. Government-guaranteed, or GSE securities, or cash. Credit exposures are measured daily and adjustments to collateral positions are made in accordance with the terms of the master-netting agreements. These master-netting agreements also contain bilateral ratings-tied termination events permitting us to terminate all outstanding derivatives transactions with a counterparty in the event of a specified rating downgrade by Moody's or S&P. We execute uncleared derivatives with nonmember counterparties rated in at least the third-highest internal rating category on a scale of FHFA-1 through FHFA-7 at the time of the transaction, although risk-reducing trades may be permitted for counterparties whose ratings have fallen below these ratings. The internal rating scale of FHFA-1 through FHFA-7 reflects progressively lower credit quality, with FHFA-1 through FHFA-4 considered to be investment quality. Some of these counterparties or their affiliates buy, sell, and distribute COs. See Note 10 — Consolidated Obligations for additional information. Uncleared derivative transactions entered on or after September 1, 2022, are subject to two-way initial margin requirements as mandated by the Wall Street Reform and Consumer Protection Act, if the aggregate uncleared derivative transaction exposure to a counterparty exceeds a specified threshold. The initial margin is required to be held at a third-party custodian and does not change ownership. Rather, the party in respect of which the initial margin has been posted to the third-party custodian will have a security interest in the amount of initial margin required under the uncleared margin regulations and can only take ownership upon the occurrence of certain events, including an event of default due to bankruptcy, insolvency, or similar proceeding. As of December 31, 2022, none of our aggregate uncleared derivative transaction exposures with any of our counterparties exceeded the specified delivery thresholds. Based on credit analyses and collateral requirements, we do not anticipate any credit losses on our uncleared derivative agreements. Currently derivatives that we use containing any optionality are not eligible for clearing. Accordingly, such derivatives, including the derivatives used to hedge issuance of callable CO bonds, are executed with our uncleared derivatives counterparties. Certain of our uncleared derivatives master-netting agreements contain provisions that require us to post additional collateral with our uncleared derivatives counterparties if our credit ratings are lowered. Under the terms that govern such agreements, if our credit rating is lowered by Moody's or S&P to a certain level, we are required to deliver additional collateral on uncleared derivatives. In the event of a split between such credit ratings, the lower rating governs. The aggregate fair value of all uncleared derivatives with these provisions that were in a net-liability position (before cash collateral and related accrued interest) at December 31, 2022, was $1.4 billion for which we had delivered collateral with a post-haircut value of $1.3 billion in accordance with the terms of the master-netting agreements. Securities collateral is subject to valuation haircuts in accordance with the terms of the master-netting arrangements. Table 8.7 sets forth the post-haircut value of incremental collateral that certain uncleared derivatives counterparties could have required us to deliver based on incremental credit rating downgrades at December 31, 2022. Table 8.7 - Post Haircut Value of Incremental Collateral to be Delivered as of December 31, 2022 (dollars in thousands) Ratings Downgrade (1) From To Incremental Collateral AA+ AA or AA- $ — AA- A+, A or A- — A- below A- 70,047 _______________________ (1) Ratings are expressed in this table according to S&P's conventions but include the equivalent of such rating by Moody's. If there is a split rating, the lower rating is used. Cleared Derivatives. For cleared derivatives, the DCO is our counterparty. The DCO notifies the clearing member of the required initial and variation margin and our agent (clearing member) in turn notifies us. We utilize one of two DCOs, for each cleared derivative transaction, CME Inc. or LCH Ltd. Based upon their rulebooks, we characterize variation margin payments as daily settlement payments, rather than as collateral. At both DCOs, posted initial margin is considered collateral. We post initial margin and exchange variation margin through a clearing member of the DCO which clears our trades, acts as our agent to the DCO and guarantees our performance to the DCO, subject to the terms of relevant agreements. These arrangements expose us to credit risk in the event that one of our clearing members or one of the DCOs fails to meet its obligations. The use of cleared derivatives is intended to mitigate credit risk exposure because the DCO, which is fully secured at all times through margin received from its clearing members, is substituted for the credit risk exposure of individual counterparties in uncleared derivatives, and collateral is posted at least once daily for changes in the fair value of cleared derivatives through a clearing member. For cleared derivatives, the DCO determines initial margin requirements. Our clearing members, which are CFTC-registered futures commission merchants, may require us to post margin in excess of DCO requirements based on our credit or other considerations, including but not limited to, credit rating downgrades. We were not required to post any such excess margin by our clearing members based on credit or any other considerations at December 31, 2022. Offsetting of Certain Derivatives. We present derivatives, any related cash collateral received or pledged, and associated accrued interest, on a net basis by counterparty. We have analyzed the rights, rules, and regulations governing our cleared and uncleared derivatives and determined that those rights, rules, and regulations should result in a net claim with each of our counterparties (which, in the context of cleared derivatives is through each of our clearing members with the related DCO) upon an event of default of our counterparty (solely in the case of uncleared derivatives) or the bankruptcy, insolvency or a similar proceeding involving our counterparty (and/or one of our clearing members, in the case of cleared derivatives). For this purpose, "net claim" generally means a single net amount reflecting the aggregation of all amounts owed by us to the relevant counterparty and payable to us from the relevant counterparty. Table 8.8 presents separately the fair value of derivatives that are subject to netting due to a legal right of offset based on the terms of our master netting arrangements or similar agreements as of December 31, 2022 and 2021, and the fair value of derivatives that are not subject to such netting. Derivatives subject to netting include any related cash collateral received from or pledged to counterparties. Table 8.8 - Netting of Derivative Assets and Derivative Liabilities (dollars in thousands) December 31, 2022 Derivative Instruments Meeting Netting Requirements Gross Recognized Amount Gross Amounts of Netting Adjustments (1) Derivative Instruments Not Meeting Netting Requirements Total Derivative Assets and Total Derivative Liabilities Non-cash Collateral (Received) or Pledged Not Offset (2) Net Amount Derivative Assets Interest-rate swaps Uncleared $ 23,782 $ (23,782) $ — $ — $ — Cleared 23,975 406,672 430,647 — 430,647 CO bond firm commitments $ 50 50 50 Mortgage delivery commitments 47 47 47 Total $ 430,744 $ 430,744 Derivative Liabilities Interest-rate swaps Uncleared $ (1,393,632) $ 1,367,994 $ (25,638) $ — $ (25,638) Cleared (684) 684 — — — Mortgage delivery commitments $ (2) (2) (2) Total $ (25,640) $ (25,640) December 31, 2021 Derivative Instruments Meeting Netting Requirements Gross Recognized Amount Gross Amounts of Netting Adjustments (1) Derivative Instruments Not Meeting Netting Requirements Total Derivative Assets and Total Derivative Liabilities Non-cash Collateral (Received) or Pledged Not Offset (2) Net Amount Derivative Assets Interest-rate swaps Uncleared $ 327 $ (103) $ 224 $ — $ 224 Cleared 3,523 374,663 378,186 — 378,186 CO bond firm commitments $ 54 54 54 Mortgage delivery commitment 68 68 68 Total $ 378,532 $ 378,532 Derivative Liabilities Interest-rate swaps Uncleared $ (171,374) $ 132,460 $ (38,914) $ 28,374 $ (10,540) Cleared (6,175) 6,175 — — — CO bond firm commitments $ (30) (30) (30) Total $ (38,944) $ (10,570) _______________________ (1) Includes gross amounts of netting adjustments and cash collateral. (2) Includes non-cash collateral at fair value that cannot be sold or repledged by the counterparty. Additionally, any overcollateralization with a counterparty is not included in the determination of the net amount. There was no overcollateralization at either December 31, 2022 or 2021.

Deposits

Deposits	12 Months Ended
	Dec. 31, 2022
Deposits [Abstract]
Deposits [Text Block]	Deposits We offer demand and overnight deposits for members and qualifying nonmembers. Members that service mortgage loans may deposit funds collected in connection with mortgage loans pending disbursement of such funds to the owners of the mortgage loans, which we classify as "other" in the following table. Deposits classified as demand, overnight, and other pay interest based on a daily interest rate. The average interest rate paid on average deposits during 2022 and 2021 was 1.01 percent and 0.01 percent, respectively. Table 9.1 - Deposits (dollars in thousands) December 31, 2022 December 31, 2021 Interest-bearing Demand and overnight $ 632,635 $ 831,009 Other 1,867 1,998 Noninterest-bearing Other 20,985 51,025 Total deposits $ 655,487 $ 884,032

Consolidated Obligations

Consolidated Obligations	12 Months Ended
	Dec. 31, 2022
Debt Disclosure [Abstract]
Consolidated Obligations [Text Block]	Consolidated ObligationsCOs consist of CO bonds and CO discount notes. CO bonds may be issued to raise short-, intermediate-, and long-term funds and are not subject to any statutory or regulatory limits on maturity. CO discount notes are issued to raise short-term funds and have original maturities of up to one year. These notes sell at less than their face amount and are redeemed at par value when they mature. Although we are primarily liable for the portion of COs issued for which we received issuance proceeds, we are also jointly and severally liable with the other FHLBanks for the payment of principal and interest on all COs. The FHFA, at its discretion, may require any FHLBank to make principal or interest payments due on any CO whether or not the CO represents a primary liability of such FHLBank. Although an FHLBank has never paid the principal or interest payments due on a CO on behalf of another FHLBank, if that event should occur, FHFA regulations provide that the paying FHLBank is entitled to reimbursement from the noncomplying FHLBank for any payments made on its behalf and other associated costs, including interest to be determined by the FHFA. If, however, the FHFA determines that the noncomplying FHLBank is unable to satisfy its repayment obligations, the FHFA may allocate the outstanding liabilities of the noncomplying FHLBank among the remaining FHLBanks on a pro rata basis in proportion to each FHLBank's participation in all COs outstanding or in any other manner it may determine to ensure that the FHLBanks operate in a safe and sound manner. See Note 16 – Commitments and Contingencies for additional information regarding the FHLBanks' joint and several liability. The par values of the FHLBanks' outstanding COs, including COs on which other FHLBanks are primarily liable, were $1.2 trillion and $652.9 billion at December 31, 2022 and 2021, respectively. Regulations require each FHLBank to maintain unpledged qualifying assets equal to outstanding COs for which it is primarily liable. Such qualifying assets include cash; secured advances; obligations of or fully guaranteed by the U.S.; obligations, participations, or other instruments of or issued by Fannie Mae or Ginnie Mae; mortgages, obligations, or other securities which are or ever have been sold by Freddie Mac; and such securities as fiduciary and trust funds may invest in under the laws of the state in which the FHLBank is located. Any assets subject to a lien or pledge for the benefit of holders of any issues of COs are treated as if they were free from lien or pledge for purposes of compliance with these regulations. CO Bonds. Table 10.1 - CO Bonds Outstanding by Contractual Maturity (dollars in thousands) December 31, 2022 December 31, 2021 Amount Weighted Average Rate (1) Amount Weighted Average Rate (1) Due in one year or less $ 10,616,385 3.15 % $ 6,919,220 0.79 % Due after one year through two years 5,321,650 1.85 3,069,155 1.18 Due after two years through three years 4,993,600 1.70 3,514,735 1.09 Due after three years through four years 5,951,355 1.10 3,029,600 0.88 Due after four years through five years 2,099,000 2.24 5,735,605 0.91 Thereafter 3,916,865 2.09 4,456,865 1.91 Total par value 32,898,855 2.17 % 26,725,180 1.10 % Premiums 27,902 40,251 Discounts (8,033) (9,011) Hedging adjustments (1,353,181) (143,388) Total $ 31,565,543 $ 26,613,032 _______________________ (1) The CO bonds' weighted-average rate excludes concession fees. CO bonds outstanding were issued with either fixed-rate coupon-payment terms or variable-rate coupon-payment terms that may use a variety of indices for interest-rate resets, such as SOFR. To meet the expected specific needs of certain investors in CO bonds, both fixed-rate CO bonds and variable-rate CO bonds may contain features which may result in complex coupon-payment terms and call options. When these CO bonds are issued, we may enter into derivatives containing features that offset the terms and embedded options, if any, of the CO bonds. Table 10.2 - CO Bonds Outstanding by Call Feature (dollars in thousands) December 31, 2022 December 31, 2021 Noncallable and nonputable $ 15,039,805 $ 13,924,180 Callable 17,859,050 12,801,000 Total par value $ 32,898,855 $ 26,725,180 Table 10.3 - CO Bonds Outstanding by Contractual Maturity or Next Call Date (dollars in thousands) December 31, 2022 December 31, 2021 Due in one year or less $ 26,319,885 $ 19,150,220 Due after one year through two years 1,843,150 3,461,155 Due after two years through three years 1,952,600 1,044,735 Due after three years through four years 1,370,355 1,544,600 Due after four years through five years 438,000 539,605 Thereafter 974,865 984,865 Total par value $ 32,898,855 $ 26,725,180 Table 10.4 - CO Bonds by Interest Rate-Payment Type (dollars in thousands) December 31, 2022 December 31, 2021 Fixed-rate $ 22,667,605 $ 17,707,180 Step-up (1) 6,031,250 4,215,000 Simple variable-rate 4,200,000 4,803,000 Total par value $ 32,898,855 $ 26,725,180 _______________________ (1) Step-up bonds pay interest at increasing fixed rates for specified intervals over the life of the CO bond and can be called at our option on the step-up dates. CO Discount Notes. Outstanding CO discount notes for which we were primarily liable, all of which are due within one year, were as follows: Table 10.5 - CO Discount Notes Outstanding (dollars in thousands) Book Value Par Value Weighted Average Rate (1) December 31, 2022 $ 26,975,260 $ 27,109,244 4.22 % December 31, 2021 $ 2,275,320 $ 2,275,519 0.05 % _______________________ (1) CO discount notes' weighted-average rate represents a yield to maturity excluding concession fees.

Affordable Housing Program

Affordable Housing Program	12 Months Ended
	Dec. 31, 2022
Affordable Housing Program AHP [Abstract]
Affordable Housing Program [Text Block]	Affordable Housing ProgramThe FHLBank Act requires each FHLBank to establish and maintain an AHP to provide subsidies in the form of direct grants or below-market interest-rates on advances (AHP advances). These funds are intended to assist in the purchase, construction, or rehabilitation of housing for very low and low- or moderate-income households with incomes at or below 80 percent of area median income. Each FHLBank recognizes AHP assessment expense equal to the greater of 10 percent of its previous year's net income before interest expense associated with mandatorily redeemable capital stock and the assessment for AHP (AHP earnings), or the prorated sum required to ensure the aggregate contribution by the FHLBanks is no less than $100 million for each year. We accrue this expense monthly based on our AHP earnings, and the accruals are accumulated into our AHP payable account. We may elect to voluntarily contribute amounts in addition to the required accruals. We reduce our AHP payable account as we disburse the funds either in the form of direct grants to member institutions or as a discount on below-market-rate AHP advances. If we experience a net loss during a quarter, but still have AHP earnings for the year, our obligation to the AHP would be calculated based on our AHP earnings for that calendar year. In annual periods where our AHP earnings are zero or less, our required AHP assessment is zero since our required annual contribution is limited to our annual AHP earnings. If the result of the aggregate 10 percent calculation described above is less than $100 million for all the FHLBanks, then each FHLBank would be required to contribute such prorated sums as may be required to ensure that the aggregate contributions by the FHLBanks equals $100 million. The proration would be made on the basis of the income of the FHLBanks for the year, except that the required annual AHP contribution for an FHLBank cannot exceed its AHP earnings for the year pursuant to an FHFA regulation. Each FHLBank's required annual AHP contribution is limited to its annual net earnings. Our required AHP expense for 2022, 2021, and 2020 was $20.5 million, $7.7 million, and $13.4 million, respectively. Additionally, in 2022, 2021, and 2020 we voluntarily contributed $5.5 million, $4.8 million and $1.6 million, respectively, to our AHP, resulting in total combined contribution amounts of $26.0 million for 2022, $12.5 million for 2021, and $15.0 million for 2020. There was no shortfall, as described above, in 2022, 2021, or 2020. If an FHLBank is experiencing financial instability and finds that its required AHP contributions are contributing to the financial instability, the FHLBank may apply to the FHFA for a temporary suspension of its contributions. We did not make such an application in 2022, 2021, or 2020. Table 11.1 - AHP Liability (dollars in thousands) 2022 2021 Balance at beginning of year $ 70,503 $ 78,640 AHP expense for the period 20,521 7,739 AHP voluntary contribution 5,479 4,761 AHP direct grant disbursements (17,683) (17,980) AHP subsidy for AHP advance disbursements (3,155) (5,806) Return of previously disbursed grants and subsidies 957 3,149 Balance at end of year $ 76,622 $ 70,503

Capital

Capital	12 Months Ended
	Dec. 31, 2022
Banking Regulation, Total Capital [Abstract]
Capital [Text Block]	Capital We are subject to capital requirements under our capital plan, the FHLBank Act, and FHFA regulations and guidance: 1. Risk-based capital. We are required to maintain at all times permanent capital, defined as the amounts paid-in for Class B stock and retained earnings, in an amount at least equal to the sum of our credit-risk capital requirement, market-risk capital requirement, and operational-risk capital requirement, calculated in accordance with FHFA rules and regulations, referred to herein as the risk-based capital requirement. 2. Total regulatory capital. We are required to maintain at all times a total capital-to-assets ratio of at least four percent. Total regulatory capital is the sum of permanent capital, the amount of any general loss allowance if consistent with GAAP and not established for specific assets, and other amounts from sources determined by the FHFA as available to absorb losses. 3. Leverage capital. We are required to maintain at all times a leverage capital-to-assets ratio of at least five percent. Leverage capital is calculated by multiplying permanent capital by 1.5 and adding to this product all other components of total capital. The FHFA has authority to require us to maintain a greater amount of permanent capital than is required as defined by the risk-based capital requirements. Table 12.1 - Regulatory Capital Requirements (dollars in thousands) Risk-Based Capital Requirements December 31, December 31, Permanent capital Class B capital stock $ 2,031,178 $ 953,638 Mandatorily redeemable capital stock 10,290 13,562 Retained earnings 1,690,568 1,548,406 Total permanent capital $ 3,732,036 $ 2,515,606 Risk-based capital requirement Credit-risk capital $ 130,875 $ 84,301 Market-risk capital 225,813 213,467 Operations-risk capital 107,006 89,330 Total risk-based capital requirement $ 463,694 $ 387,098 Permanent capital in excess of risk-based capital requirement $ 3,268,342 $ 2,128,508 December 31, 2022 December 31, 2021 Required Actual Required Actual Capital Ratio Risk-based capital $ 463,694 $ 3,732,036 $ 387,098 $ 2,515,606 Total regulatory capital $ 2,515,902 $ 3,732,036 $ 1,301,812 $ 2,515,606 Total capital-to-asset ratio 4.0 % 5.9 % 4.0 % 7.7 % Leverage Ratio Leverage capital $ 3,144,877 $ 5,598,054 $ 1,627,265 $ 3,773,409 Leverage capital-to-assets ratio 5.0 % 8.9 % 5.0 % 11.6 % We are a cooperative whose members own most of our capital stock. Former members, including certain nonmembers that own our capital stock as a result of merger or acquisition, relocation, or involuntary termination of membership, own the remaining capital stock to support business transactions still carried on our statement of condition or, for a small amount of capital stock held by former members, until the five-year redemption period applicable to their membership stock is complete. Shares of capital stock cannot be purchased or sold except between us and our members at $100 per share par value. Each member is required to purchase Class B stock equal to 0.05 percent of the value of the member's total assets measured as of December 31 of the preceding year, subject to a current minimum balance of $10 thousand and a current maximum balance of $5 million (the membership stock investment requirement), and 3.00 percent for overnight advances, 4.00 percent for all other advances, 0.25 percent for outstanding letters of credit, and 4.50 percent of the par value of certain mortgage we purchased through the MPF program (collectively, the activity-based stock-investment requirement). The sum of the membership stock investment requirement and the activity-based stock investment requirement, rounded up to the nearest whole share, represents the total stock investment requirement. Members may redeem Class B stock after no sooner than five years' notice provided in accordance with our capital plan (the redemption-notice period). The effective date of termination of membership for any member that voluntarily withdraws from membership is the end of the redemption-notice period, at which time any stock that is held as a condition of membership shall be divested, subject to any other applicable restrictions. At that time, any stock held pursuant to activity-based stock investment requirements shall remain outstanding until such requirements are eliminated by disposition of the related business activity. Any member that withdraws from membership, or otherwise has had its membership terminated, may not be readmitted to membership in any FHLBank until five years from the divestiture date for all capital stock that is held as a condition of membership. This restriction does not apply if the member is transferring its membership from one FHLBank to another on an uninterrupted basis. The redemption-notice period can also be triggered by the involuntary termination of membership of a member by our board of directors or by the FHFA, the merger or acquisition of a member into a nonmember institution, or the relocation of a member to a principal location outside our district. At the end of the redemption-notice period, if the former member's activity-based stock investment requirement is greater than zero, we may require the associated remaining obligations to us to be satisfied in full prior to allowing the member to redeem the remaining shares. Because our Class B stock is subject to redemption in certain instances, we can experience a reduction in our capital, particularly due to membership terminations due to merger and acquisition activity. However, there are several mitigants to this risk, including, but not limited to, the following: • the activity-based stock-investment requirement allows us to retain stock beyond the redemption-notice period if the associated member-related activity is still outstanding, until the obligations are paid in full; • the redemption notice period allows for a significant period in which we can restructure our balance sheet to accommodate a reduction in capital; • our board of directors may modify the membership stock-investment requirement (MSIR) or the activity-based stock-investment requirement (ABSIR), or both, to address expected shortfalls in capitalization due to membership termination; • our board of directors or the FHFA may suspend redemptions in the event that such redemptions would cause us not to meet our minimum regulatory capital requirements; and • the growth in our retained earnings, which are included in our equity capital, helps offset the risk that our capital could be reduced by redemptions. Our board of directors may declare and pay dividends in either cash or capital stock, subject to limitations in applicable law and our capital plan. Restricted Retained Earnings. At December 31, 2022, our contribution requirement totaled $582.4 million. At December 31, 2022 and 2021, restricted retained earnings totaled $399.7 million and $368.4 million, respectively. These restricted retained earnings are not available to pay dividends. Mandatorily Redeemable Capital Stock. We will reclassify capital stock subject to redemption from equity to liability once a member exercises a written notice of redemption, gives notice of intent to withdraw from membership, or attains nonmember status by merger or acquisition, charter termination, or involuntary termination from membership. Dividends related to capital stock classified as a liability are accrued at the expected dividend rate and reported as interest expense in the statement of operations. If a member cancels its written notice of redemption or notice of withdrawal, we will reclassify mandatorily redeemable capital stock from a liability to equity. After the reclassification, dividends on the capital stock would no longer be classified as interest expense. Redemption of capital stock is subject to the redemption-notice period and our satisfaction of applicable minimum capital requirements. For the years ended December 31, 2022, 2021, and 2020, dividends on mandatorily redeemable capital stock of $474 thousand, $192 thousand, and $221 thousand, respectively, were recorded as interest expense. Table 12.2 - Mandatorily Redeemable Capital Stock (dollars in thousands) 2022 2021 2020 Balance at beginning of year $ 13,562 $ 6,282 $ 5,806 Capital stock subject to mandatory redemption reclassified from capital 8,961 10,265 581 Redemption/repurchase of mandatorily redeemable capital stock (12,233) (2,985) (105) Balance at end of year $ 10,290 $ 13,562 $ 6,282 The number of stockholders holding mandatorily redeemable capital stock was 11, 14, and 12 at December 31, 2022, 2021, and 2020, respectively. Table 12.3 - Mandatorily Redeemable Capital Stock by Expiry of Redemption Notice Period (dollars in thousands) December 31, 2022 December 31, 2021 Past redemption date (1) $ 2,980 $ 3,138 Due in one year or less 59 92 Due after one year through two years — 30 Due after two years through three years 435 — Due after three years through four years 689 581 Due after four years through five years 6,127 9,721 Total $ 10,290 $ 13,562 _______________________ (1) Amount represents mandatorily redeemable capital stock that has reached the end of the five-year redemption-notice period but the member-related activity (for example, advances) remains outstanding. Accordingly, these shares of stock will not be redeemed until the activity is no longer outstanding. A member may cancel or revoke its written notice of redemption or its notice of withdrawal from membership prior to the end of the redemption-notice period. Our capital plan provides that we will charge the member a cancellation fee in the amount of 2.0 percent of the par amount of the shares of Class B stock that is the subject of the redemption notice. We will assess a redemption-cancellation fee unless the board of directors decides that it has a bona fide business purpose for waiving the imposition of the fee, and such a waiver is consistent with the FHLBank Act. Excess Capital Stock Repurchases. Our capital plan provides us with the sole discretion to repurchase capital stock from a member at par value that is in excess of the amount required to meet the member's total stock investment requirement (excess capital stock) subject to all applicable limitations. In conducting any repurchases, we repurchase any shares that are the subject of an outstanding redemption notice from the member from whom we are repurchasing prior to repurchasing any other shares that are in excess of the member's total stock-investment requirement (TSIR). We generally repurchase excess stock held by any shareholder whose excess stock exceeds the lesser of $3.0 million or 3.00 percent of the shareholder’s total stock investment requirement, subject to a minimum repurchase of $100,000. We plan to continue with this practice, subject to regulatory requirements and our anticipated liquidity or capital management needs, although continued repurchases remain at our sole discretion, and we retain authority to suspend repurchases of excess stock from any shareholder or all shareholders without prior notice. In addition to these daily repurchases, subject to our sole discretion shareholders may request that we voluntarily repurchase excess stock shares at any time. We may also allow the member to sell the excess capital stock at par value to another one of our members. At December 31, 2022 and 2021, members and nonmembers with capital stock outstanding held excess capital stock totaling $56.9 million and $32.6 million, respectively, representing approximately 2.8 percent and 3.4 percent, respectively, of total capital stock outstanding. FHFA rules limit our ability to create member excess capital stock under certain circumstances. We may not pay dividends in the form of capital stock or issue new excess capital stock to members if our excess capital stock exceeds one percent of our total assets or if the issuance of excess capital stock would cause our excess capital stock to exceed one percent of our total assets. At December 31, 2022, we had excess capital stock outstanding totaling 0.1 percent of our total assets. For the year ended December 31, 2022, we complied with the FHFA's excess capital stock rule. Capital Classification Determination. We are subject to the FHFA's regulation on FHLBank capital classification and critical capital levels (the Capital Rule). The Capital Rule, among other things, defines criteria for four capital classifications and corrective action requirements for FHLBanks that are classified in any classification other than adequately capitalized. An adequately capitalized FHLBank is one that has sufficient permanent and total capital to satisfy its risk-based and minimum capital requirements. We satisfied these requirements at December 31, 2022. However, pursuant to the Capital Rule, the FHFA has discretion to reclassify an FHLBank and modify or add to corrective action requirements for a particular capital classification. If we become classified into a capital classification other than adequately capitalized, we will be subject to the corrective action requirements for that capital classification in addition to being subject to prohibitions on declaring dividends and redeeming or repurchasing capital stock. By letter dated March 16, 2023, the Director of the FHFA notified us that, based on December 31, 2022 financial information, we met the definition of adequately capitalized under the Capital Rule.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2022
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income (Loss) [Text Block]	Accumulated Other Comprehensive Income (Loss) Table 13.1 - Accumulated Other Comprehensive Income (Loss) (dollars in thousands) Net Unrealized Gain (Loss) on Available-for-sale Securities Noncredit Portion of Other-than-temporary Impairment Losses on Held-to-maturity Securities Net Unrealized Loss Relating to Hedging Activities Pension and Postretirement Benefits Total Balance, December 31, 2019 $ (73,922) $ (76,036) $ (30,207) $ (6,807) $ (186,972) Other comprehensive income (loss) before reclassifications: Adjustment for transfer of securities from held-to-maturity to available-for-sale 16,062 31,502 — — 47,564 Net unrealized gains (losses) 137,011 — (1,187) — 135,824 Noncredit losses included in basis of securities sold — 39,144 — — 39,144 Accretion of noncredit loss — 5,390 — — 5,390 Net actuarial loss — — — (2,386) (2,386) Reclassifications from other comprehensive income to net income Reclassification of realized net gains included in net income (30,583) — — — (30,583) Amortization - hedging activities (1) — — 7,029 — 7,029 Amortization - pension and postretirement benefits (2) — — — 1,129 1,129 Other comprehensive income (loss) 122,490 76,036 5,842 (1,257) 203,111 Balance, December 31, 2020 48,568 — (24,365) (8,064) 16,139 Other comprehensive income (loss) before reclassifications: Net unrealized gains (losses) 9,445 — (7,875) — 1,570 Net actuarial gain — — — 4,059 4,059 Reclassifications from other comprehensive income to net income Amortization - hedging activities (1) — — 5,949 — 5,949 Amortization - pension and postretirement benefits (2) — — — 1,250 1,250 Other comprehensive income (loss) 9,445 — (1,926) 5,309 12,828 Balance, December 31, 2021 58,013 — (26,291) (2,755) 28,967 Other comprehensive income (loss) before reclassifications: Net unrealized (losses) gains (408,296) — 63,234 — (345,062) Net actuarial gain — — — 4,310 4,310 Reclassifications from other comprehensive income to net income Reclassification of realized net loss included in net income 2 — — — 2 Amortization - hedging activities (1) — — 5,539 — 5,539 Amortization - pension and postretirement benefits (2) — — — (181) (181) Other comprehensive (loss) income (408,294) — 68,773 4,129 (335,392) Balance, December 31, 2022 $ (350,281) $ — $ 42,482 $ 1,374 $ (306,425) _______________________ (1) Recorded in CO bond interest expense. (2) Recorded in other expenses in the statement of operations.

Employee Retirement Plans

Employee Retirement Plans	12 Months Ended
	Dec. 31, 2022
Retirement Benefits [Abstract]
Employee Retirement Plans [Text Block]	Employee Retirement Plans Qualified Defined Benefit Multiemployer Plan. We participate in the Pentegra Defined Benefit Plan for Financial Institutions (the Pentegra Defined Benefit Plan), a funded, tax-qualified, noncontributory defined-benefit pension plan. The Pentegra Defined Benefit Plan is treated as a multiemployer plan for accounting purposes, but operates as a multiple-employer plan under the Employee Retirement Income Security Act of 1974, as amended (ERISA), and the Internal Revenue Code. Accordingly, certain multiemployer plan disclosures are not applicable to the Pentegra Defined Benefit Plan. Under the Pentegra Defined Benefit Plan, contributions made by a participating employer may be used to provide benefits to employees of other participating employers since assets contributed by an employer are not segregated in a separate account or restricted to provide benefits only to employees of that employer. Also, in the event a participating employer is unable to meet its contribution requirements, the required contributions for the other participating employers could increase proportionately. The plan covers substantially all of our employees. For the year ended December 31, 2020, in addition to our required contribution, we made voluntary contributions of $6.0 million to the Pentegra Defined Benefit Plan. We were not required to nor did we pay a funding improvement surcharge to the plan for the years ended December 31, 2022, 2021, and 2020. The Pentegra Defined Benefit Plan operates on a fiscal year from July 1 through June 30. The Pentegra Defined Benefit Plan files one Form 5500 on behalf of all employers who participate in the plan. The Employer Identification Number is 13-5645888 and the three-digit plan number is 333. We do not have any collective bargaining agreements in place. The Pentegra Defined Benefit Plan's annual valuation process includes calculating the plan's funded status and separately calculating the funded status of each participating employer. The funded status is defined as the market value of assets divided by the funding target (100 percent of the present value of all benefit liabilities accrued at that date). As permitted by ERISA, the Pentegra Defined Benefit Plan accepts contributions for the prior plan year up to eight and a half months after the asset valuation date. Accordingly, the market value of assets at the valuation date (July 1) will increase by any subsequent contributions designated for the immediately preceding plan year ended June 30. The most recent Form 5500 available for the Pentegra Defined Benefit Plan is for the plan year ended June 30, 2021. For the Pentegra Defined Benefit Plan plan years ended June 30, 2020 and 2019, our contributions did not represent more than five percent of the total contributions to the Pentegra Defined Benefit Plan. On November 30, 2020, the board of directors elected to freeze the Pentegra Defined Benefit Plan. Employees hired on or after January 1, 2021, are ineligible to participate in the Pentegra Defined Benefit Plan, and on January 1, 2024, future benefit accruals under the plan will cease for all employees that were hired before January 1, 2021. Table 14.1 - Pentegra Defined Benefit Plan Net Pension Cost and Funded Status (dollars in thousands) For the Years Ended December 31, 2022 2021 2020 Net pension cost $ 704 $ 883 $ 6,843 Pentegra Defined Benefit Plan funded status as of July 1 (1) 118.9 % (2) 130.6 % (3) 108.5 % Our funded status as of July 1 (1) 119.2 % 136.4 % 110.2 % ______________________ (1) The funded status is calculated in accordance with a provision contained in the Highway and Transportation Funding Act of 2014 (HATFA), which was signed into law on August 8, 2014, and which modifies the interest rates that had been set by the Moving Ahead for Progress in the 21st Century Act (MAP-21). MAP-21, signed into law in 2012, changed the calculation of the discount rate used in measuring the pension plan liability. MAP-21 allows plan sponsors to measure the pension plan liability using a 25-year average of interest rates plus or minus a corridor. Prior to MAP-21, the discount rate used in measuring the pension plan liability was based on the 24-month average of interest rates. HATFA amended MAP-21 by extending the time period and reducing the rate at which the 25-year corridors widen. Over time, the pension funding stabilization effect of MAP-21 will decline because the 24-month smoothed segment rates and the amended 25-year corridors are likely to converge. (2) The funded status as of July 1, 2022, is preliminary and may increase because the plan's participants were permitted to make contributions for the plan year ended June 30, 2022, through March 15, 2023. Contributions made on or before March 15, 2023, and designated for the plan year ended June 30, 2022, will be included in the final valuation as of July 1, 2022. The final funded status as of July 1, 2022, will not be available until the Form 5500 for the plan year July 1, 2022, through June 30, 2023 is filed. This Form 5500 is due to be filed no later than April 2024. (3) The funded status as of July 1, 2021, is preliminary and may increase because the plan's participants were permitted to make contributions for the plan year ended June 30, 2021, through March 15, 2022. Contributions made on or before March 15, 2022, and designated for the plan year ended June 30, 2021, will be included in the final valuation as of July 1, 2021. The final funded status as of July 1, 2021, will not be available until the Form 5500 for the plan year July 1, 2021, through June 30, 2022 is filed. This Form 5500 is due to be filed no later than April 2023. Qualified Defined Contribution Plan. We also maintain a Pentegra Defined Contribution Plan for Financial Institutions, a tax-qualified defined contribution plan. The plan covers substantially all of our employees. We contribute a percentage of the participants' compensation by making a matching contribution equal to a certain percentage of voluntary employee contributions, subject to certain limitations. Our matching contributions are charged to compensation and benefits expense and are not considered to be material. On November 30, 2020, the board of directors adopted changes to the Pentegra Defined Contribution Plan to add, subject to certain limitations of the Internal Revenue Code, a non-elective, non-matching contribution from the Bank of six percent of each eligible employee’s salary for employees who are ineligible to accrue benefits under the Pentegra Defined Benefit Plan, either because they were hired on or after January 1, 2021, or because benefit accruals have ceased on January 1, 2024. Nonqualified Defined Contribution Plan. We also maintain the Thrift Benefit Equalization Plan, a nonqualified, unfunded deferred compensation plan covering certain of our senior officers and directors. The plan's liability consists of the accumulated compensation deferrals and the accumulated earnings on these deferrals. Our obligation from this plan was $11.4 million and $13.5 million at December 31, 2022 and 2021, respectively, which is recorded in other liabilities on the statement of condition. We maintain a rabbi trust, which is recorded in other assets on the statement of condition, intended to satisfy future benefit obligations. Our matching contributions are charged to compensation and benefits expense and are not considered to be material. On November 30, 2020, the board of directors adopted changes to the Thrift Benefit Equalization Plan to add, subject to certain limitations of the Internal Revenue Code, a non-elective, non-matching contribution from the Bank of six percent of each eligible executive participant's salary for certain senior officers who are ineligible to accrue benefits under the Nonqualified Supplemental Defined Benefit Retirement Plan, either because they were hired on or after January 1, 2021, or because benefit accruals have ceased on January 1, 2024. Nonqualified Supplemental Defined Benefit Retirement Plan. We also maintain a nonqualified, single-employer unfunded defined-benefit plan covering certain senior officers, for which our obligation is detailed below. We maintain a rabbi trust which is recorded in other assets on the statement of condition, intended to satisfy future benefit obligations. On November 30, 2020, the board of directors elected to freeze this plan. Senior officers hired on or after January 1, 2021, are ineligible to participate in the plan, and on January 1, 2024, future benefit accruals under the plan will cease for all senior officers. Postretirement Benefits. We sponsor a fully insured postretirement benefit program that includes life insurance benefits for eligible retirees. We provide life insurance to all employees who retire on or after age 55 after completing six years of service. No contributions are required from the retirees. There are no funded plan assets that have been designated to provide postretirement benefits. Table 14.2 - Pension and Postretirement Benefit Obligation, Fair Value of Plan Assets, and Funded Status (dollars in thousands) Nonqualified Supplemental Defined Benefit Retirement Plan Postretirement Benefits December 31, 2022 December 31, 2021 December 31, 2022 December 31, 2021 Change in benefit obligation (1) Benefit obligation at beginning of year $ 19,828 $ 28,028 $ 1,658 $ 1,690 Service cost 856 1,347 34 45 Interest cost 497 407 48 43 Actuarial gain (3,726) (3,960) (584) (99) Benefits paid (129) (137) (25) (21) Settlements (3,346) (5,857) — — Benefit obligation at end of year 13,980 19,828 1,131 1,658 Change in plan assets Fair value of plan assets at beginning of year — — — — Employer contribution 3,475 5,994 25 21 Benefits paid (129) (137) (25) (21) Settlements (3,346) (5,857) — — Fair value of plan assets at end of year — — — — Funded status at end of year $ (13,980) $ (19,828) $ (1,131) $ (1,658) ______________________ (1) Represents the projected benefit obligation for the nonqualified supplemental defined benefit retirement plan and the accumulated postretirement benefit obligation for postretirement benefits. Table 14.3 - Pension and Postretirement Benefits Recognized in Accumulated Other Comprehensive Income (dollars in thousands) Nonqualified Supplemental Defined Benefit Retirement Plan Postretirement December 31, 2022 December 31, 2021 December 31, 2022 December 31, 2021 Net actuarial (gain) loss $ (1,288) $ 2,218 $ (85) $ 537 The accumulated benefit obligation for the nonqualified supplemental defined benefit retirement plan was $13.7 million and $19.7 million at December 31, 2022 and 2021, respectively. Table 14.4 - Net Periodic Benefit Cost and Other Amounts Recognized in Other Comprehensive Income (dollars in thousands) Nonqualified Supplemental Defined Benefit Retirement Plan Postretirement Benefits 2022 2021 2020 2022 2021 2020 Net Periodic Benefit Cost Service cost $ 856 $ 1,347 $ 1,487 $ 34 $ 45 $ 44 Interest cost 497 407 551 48 43 44 Amortization of prior service cost — — 79 — — — Amortization of net actuarial loss 290 543 1,020 39 52 30 Curtailment charge — — 69 — — — Settlement (gain) loss (510) 655 875 — — — Net periodic benefit cost 1,133 2,952 4,081 121 140 118 Other Changes in Benefit Obligations Recognized in Accumulated Other Comprehensive Income (Loss) Amortization of prior service cost — — (79) — — — Amortization of net actuarial loss (290) (543) (1,020) (39) (52) (30) Net actuarial (gain) loss (3,726) (3,960) 3,048 (584) (99) 282 Curtailment charge — — (69) — — — Settlement gain (loss) recognized in earnings 510 (655) (875) — — — Total amount recognized in other comprehensive income (3,506) (5,158) 1,005 (623) (151) 252 Total amount recognized in net periodic benefit cost and other comprehensive income $ (2,373) $ (2,206) $ 5,086 $ (502) $ (11) $ 370 Table 14.5 - Pension and Postretirement Benefit Plan Key Assumptions Nonqualified Supplemental Defined Benefit Retirement Plan Postretirement 2022 2021 2022 2021 Benefit obligation Discount rate 4.90 % 2.32 % 5.03 % 2.85 % Salary increases 5.50 % 5.50 % — — Net periodic benefit cost Discount rate 2.32 % 1.73 % 2.85 % 2.55 % Salary increases 5.50 % 5.50 % — — The discount rate for the nonqualified supplemental defined benefit retirement plan was determined by using a discounted cash-flow analysis using the FTSE Pension Discount Curve as of December 31, 2022. Our nonqualified supplemental defined benefit retirement plan and postretirement benefits are not funded; therefore, no contributions will be made in 2023 other than the payment of benefits. Table 14.6 - Estimated Future Benefit Payments (dollars in thousands) Estimated Future Payments Nonqualified Supplemental Defined Benefit Postretirement 2023 $ 1,591 $ 27 2024 2,295 29 2025 4,532 31 2026 2,225 33 2027 210 36 2028-2032 1,495 222

Fair Values

Fair Values	12 Months Ended
	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Fair Value [Text Block]	Fair Values Fair-Value Methodologies and Techniques We have determined the fair-value amounts below using available market and other pertinent information and our best judgment of appropriate valuation methods. Fair value is the price in an orderly transaction between market participants to sell an asset or transfer a liability in the principal (or advantageous) market for the asset or liability at the measurement date (an exit price). Although we use our best judgment in estimating the fair value of these financial instruments, there are inherent limitations in any estimation technique or valuation methodology. For example, because an active secondary market does not exist for a portion of our financial instruments, in certain cases, fair values are not subject to precise quantification or verification and may change as economic and market factors and evaluation of those factors change. Therefore, these fair values are not necessarily indicative of the amounts that would be realized in current market transactions, although they do reflect our judgment of how a market participant would estimate the fair values. Additionally, these values do not represent an estimate of the overall market value of the Bank as a going concern, which would take into account, among other things, future business opportunities and the net profitability of assets and liabilities. Fair-Value Hierarchy. GAAP establishes a fair-value hierarchy and requires an entity to maximize the use of significant observable inputs and minimize the use of significant unobservable inputs when measuring fair value. The inputs are evaluated and an overall level for the fair-value measurement is determined. This overall level is an indication of market observability of the fair-value measurement for the asset or liability. An entity must disclose the level within the fair value hierarchy in which the measurements are classified. The fair-value hierarchy prioritizes the inputs used to measure fair value into three broad levels: Level 1 Quoted prices (unadjusted) for identical assets or liabilities in an active market that the reporting entity can access on the measurement date. An active market for the asset or liability is a market in which the transaction for the asset or liability occurs with sufficient frequency and volume to provide pricing information on an ongoing basis. Level 2 Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. If the asset or liability has a specified or contractual term, a Level 2 input must be observable for substantially the full term of the asset or liability. Level 2 inputs include the following: (1) quoted prices for similar assets or liabilities in active markets; (2) quoted prices for identical or similar assets or liabilities in markets that are not active; (3) inputs other than quoted prices that are observable for the asset or liability (e.g., interest rates and yield curves that are observable at commonly quoted intervals, volatilities, and prepayment speeds); and (4) inputs that are derived principally from or corroborated by observable market data (e.g., implied spreads). Level 3 Unobservable inputs for the asset or liability. Valuations are derived from techniques that use significant assumptions not observable in the market, which include pricing models, discounted cash flow models, or similar techniques. We review the fair-value hierarchy classifications on a quarterly basis. Changes in the observability of the valuation inputs may result in a reclassification of certain assets or liabilities. There were no such transfers into or out of Level 3 of the fair value hierarchy during the years ended December 31, 2022 and 2021. Table 15.1 presents the carrying value, fair value, and fair value hierarchy of our financial assets and liabilities at December 31, 2022 and 2021. We record trading securities, available-for-sale securities, derivative assets, derivative liabilities, and certain other assets at fair value on a recurring basis and certain mortgage loans, and certain other assets at fair value on a non-recurring basis. We record all other financial assets and liabilities at amortized cost. Refer to Table 15.2 for further details about the financial assets and liabilities held at fair value on either a recurring or non-recurring basis. Table 15.1 - Fair Value Summary (dollars in thousands) December 31, 2022 Carrying Total Fair Value Level 1 Level 2 Level 3 Netting Adjustments and Cash Collateral (2) Financial instruments Assets: Cash and due from banks $ 7,593 $ 7,593 $ 7,593 $ — $ — $ — Interest-bearing deposits 1,485,290 1,485,290 1,485,290 — — — Federal funds sold 2,706,000 2,705,992 — 2,705,992 — — Trading securities (1) 1,507 1,507 — 1,507 — — Available-for-sale securities (1) 13,626,916 13,626,916 — 13,594,142 32,774 — Held-to-maturity securities 99,068 98,591 — 98,591 — — Advances 41,599,581 41,378,357 — 41,378,357 — — Mortgage loans, net 2,758,429 2,483,271 — 2,462,257 21,014 — Accrued interest receivable 134,268 134,268 — 134,268 — — Derivative assets (1) 430,744 430,744 — 47,854 — 382,890 Other assets (1) 25,504 25,504 11,950 13,554 — — Liabilities: Deposits (655,487) (655,425) — (655,425) — — COs: Bonds (31,565,543) (30,981,391) — (30,981,391) — — Discount notes (26,975,260) (26,972,926) — (26,972,926) — — Mandatorily redeemable capital stock (10,290) (10,290) (10,290) — — — Accrued interest payable (130,515) (130,515) — (130,515) — — Derivative liabilities (1) (25,640) (25,640) — (1,394,319) — 1,368,679 Other: Commitments to extend credit for advances — (13,327) — (13,327) — — Standby letters of credit (1,168) (1,168) — (1,168) — — December 31, 2021 Carrying Total Fair Level 1 Level 2 Level 3 Netting Adjustments and Cash Collateral (2) Financial instruments Assets: Cash and due from banks $ 204,993 $ 204,993 $ 204,993 $ — $ — $ — Interest-bearing deposits 85,153 85,153 85,153 — — — Securities purchased under agreements to resell 800,000 799,998 — 799,998 — — Federal funds sold 1,944,000 1,943,998 — 1,943,998 — — Trading securities (1) 501,867 501,867 — 501,867 — — Available-for-sale securities (1) 12,895,987 12,895,987 — 12,833,722 62,265 — Held-to-maturity securities 145,492 148,068 — 148,068 — — Advances 12,340,020 12,440,985 — 12,440,985 — — Mortgage loans, net 3,120,159 3,234,829 — 3,204,222 30,607 — Accrued interest receivable 68,360 68,360 — 68,360 — — Derivative assets (1) 378,532 378,532 — 3,972 — 374,560 Other assets (1) 32,570 32,570 13,937 18,633 — — Liabilities: Deposits (884,032) (884,029) — (884,029) — — COs: Bonds (26,613,032) (26,882,036) — (26,882,036) — — Discount notes (2,275,320) (2,275,276) — (2,275,276) — — Mandatorily redeemable capital stock (13,562) (13,562) (13,562) — — — Accrued interest payable (60,968) (60,968) — (60,968) — — Derivative liabilities (1) (38,944) (38,944) — (177,578) — 138,634 Other: Commitments to extend credit for advances — (6,196) — (6,196) — — Standby letters of credit (1,146) (1,146) — (1,146) — — _______________________ (1) Carried at fair value and measured on a recurring basis. (2) These amounts represent the effect of master-netting agreements intended to allow us to settle positive and negative positions and also cash collateral and related accrued interest held or placed with the same clearing member and/or counterparty. Summary of Valuation Methodologies and Primary Inputs The valuation methodologies and primary inputs used to develop the measurement of fair value for assets and liabilities that are measured at fair value on a recurring or nonrecurring basis in the Statement of Condition are listed below. The fair values and level within the fair value hierarchy of these assets and liabilities are reported in Table 15.2. Investment Securities. We determine the fair values of our investment securities, other than HFA floating-rate securities, based on prices obtained for each of these securities that we request from multiple designated third-party pricing vendors. The fair value of each such security is the average of such vendor prices that are within a cluster pricing tolerance range. A cluster is defined as a group of available vendor prices for a given security that is within a defined price tolerance range of the median vendor price depending on the security type. An outlier is any vendor price that is outside of the defined cluster and is evaluated for reasonableness. All prices that are within a specified tolerance threshold of the median price are included in the cluster of prices that are averaged to compute a default price. Vendor prices that are outside of a defined cluster are identified as outliers and are subject to additional review including, but not limited to, comparison to prices provided by an additional third-party valuation vendor, prices for similar securities, and/or nonbinding dealer estimates, or the use of internal model prices, which we believe reflect the facts and circumstances that a market participant would consider. We also perform this analysis in those limited instances where no third-party vendor price or only one third-party vendor price is available to determine fair value. If the analysis indicates that an outlier is not representative of fair value and that the average of the vendor prices within the tolerance threshold of the median price is the best estimate, then we use the average of the vendor prices within the tolerance threshold of the median price as the final price. If, on the other hand, we determine that an outlier (or some other price identified in the analysis) is a better estimate of fair value, then the outlier (or the other price as appropriate) is used as the final price. In all cases, the final price is used to determine the fair value of the security. As of December 31, 2022, multiple vendor prices were received for substantially all of our investment securities and the final prices for substantially all of those securities were computed by averaging the prices received. The relative proximity of the prices received supports our conclusion that the final computed prices are reasonable estimates of fair value. Our fixed-rate HFA securities fall within Level 3 of the fair-value hierarchy due to the current lack of market activities for these bonds. Investment Securities – HFA Floating Rate Securities. The fair value is determined by calculating the present value of the expected future cash flows. The discount rates used in these calculations are the rates for securities with similar terms. Our floating rate HFA securities fall within Level 3 of the fair-value hierarchy due to the current lack of market activity for these bonds. Mortgage Loans. The fair value of impaired conventional mortgage loans is based on the lower of the carrying value of the loans or fair value of the collateral less estimated costs to sell. The fair value of impaired government mortgage loans is equal to the par value. REO. Fair value is derived from third-party valuations of the property, which fall within Level 3 of the fair-value hierarchy. Derivative Assets/Liabilities - Interest-Rate-Exchange Agreements . We base the fair values of interest-rate-exchange agreements on available market prices of derivatives having similar terms, including accrued interest receivable and payable. The fair-value methodology uses standard valuation techniques for derivatives such as discounted cash-flow analysis and comparisons with similar instruments. The fair values of all interest-rate-exchange agreements are netted by clearing member and/or by counterparty, including cash collateral received from or delivered to the counterparty. If these netted amounts are positive, they are classified as an asset, and if negative, they are classified as a liability. We generally use a midmarket pricing convention based on the bid-ask spread as a practical expedient for fair-value measurements. Because these estimates are made at a specific point in time, they are susceptible to material near-term changes. We have evaluated the potential for the fair value of the instruments to be affected by counterparty risk and our own credit risk and have determined that no adjustments were significant to the overall fair-value measurements. The discounted cash-flow model uses market-observable inputs (inputs that are actively quoted and can be validated to external sources), including the following: • Discount rate assumption . For all derivatives cleared through a DCO the discount rate used is SOFR. For our bilateral, non-cleared interest-rate derivatives the discount rate used is either SOFR, OIS, or the LIBOR swap curve depending on the terms of the International Swaps and Derivatives Association (ISDA) agreement we have with each derivative counterparty. • Forward interest-rate assumption . Forward rates implied by the LIBOR swap curve, forward rates based on the OIS swap curve or forward rates implied by the SOFR swap curve. • Volatility assumption . Market-based expectations of future interest-rate volatility implied from current market prices for similar options. Derivative Assets/Liabilities – Commitments to Invest in Mortgage Loans . Commitments to invest in mortgage loans are recorded as derivatives in the statement of condition. The fair values of such commitments are based on the end-of-day delivery commitment prices provided by the FHLBank of Chicago and a spread, derived from MBS TBA delivery commitment prices with adjustment for the contractual features of the MPF program, such as servicing and credit-enhancement features. Subjectivity of Estimates. Estimates of the fair value of financial assets and liabilities using the methodologies described above are highly subjective and require judgments regarding significant matters such as the amount and timing of future cash flows, prepayment speed assumptions, expected interest-rate volatility, possible distributions of future interest rates used to value options, and the selection of discount rates that appropriately reflect market and credit risks. The use of different assumptions could have a material effect on the fair-value estimates. Since these estimates are made as of a specific point in time, they are susceptible to material near-term changes. Fair Value Measured on a Recurring and Nonrecurring Basis. Table 15.2 - Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis (dollars in thousands) December 31, 2022 Level 1 Level 2 Level 3 Netting Adjustments and Cash Collateral (1) Total Assets: Carried at fair value on a recurring basis Trading securities: Corporate bonds $ — $ 1,507 $ — $ — $ 1,507 Total trading securities — 1,507 — — 1,507 Available-for-sale securities: U.S. Treasury obligations — 5,723,562 — — 5,723,562 HFA securities — — 32,774 — 32,774 Supranational institutions — 350,352 — — 350,352 U.S. government-owned corporations — 227,200 — — 227,200 GSE — 97,666 — — 97,666 U.S. government guaranteed – single-family MBS — 16,148 — — 16,148 U.S. government guaranteed – multifamily MBS — 476,730 — — 476,730 GSE – single-family MBS — 765,526 — — 765,526 GSE – multifamily MBS — 5,936,958 — — 5,936,958 Total available-for-sale securities — 13,594,142 32,774 — 13,626,916 Derivative assets: Interest-rate-exchange agreements — 47,757 — 382,890 430,647 CO Bond firm commitments — 50 — — 50 Mortgage delivery commitments — 47 — — 47 Total derivative assets — 47,854 — 382,890 430,744 Other assets 11,950 13,554 — — 25,504 Total assets carried at fair value on a recurring basis $ 11,950 $ 13,657,057 $ 32,774 $ 382,890 $ 14,084,671 Carried at fair value on a nonrecurring basis (2) Mortgage loans held for portfolio $ — $ — $ 90 $ — $ 90 Total assets carried at fair value on a nonrecurring basis $ — $ — $ 90 $ — $ 90 Liabilities: Carried at fair value on a recurring basis Derivative liabilities Interest-rate-exchange agreements $ — $ (1,394,317) $ — $ 1,368,679 $ (25,638) Mortgage delivery commitments — (2) — — (2) Total liabilities carried at fair value on a recurring basis $ — $ (1,394,319) $ — $ 1,368,679 $ (25,640) December 31, 2021 Level 1 Level 2 Level 3 Netting (1) Total Assets: Carried at fair value on a recurring basis Trading securities: Corporate bonds $ — $ 1,442 $ — $ — $ 1,442 U.S. Treasury obligations — 500,425 — — 500,425 Total trading securities — 501,867 — — 501,867 Available-for-sale securities: U.S. Treasury obligations — 5,084,546 — — 5,084,546 HFA securities — — 62,265 — 62,265 Supranational institutions — 403,765 — — 403,765 U.S. government-owned corporations — 306,864 — — 306,864 GSE — 126,472 — — 126,472 U.S. government guaranteed – single-family MBS — 21,535 — — 21,535 U.S. government guaranteed – multifamily MBS — 541,405 — — 541,405 GSE – single-family MBS — 1,103,714 — — 1,103,714 GSE – multifamily MBS — 5,245,421 — — 5,245,421 Total available-for-sale securities — 12,833,722 62,265 — 12,895,987 Derivative assets: Interest-rate-exchange agreements — 3,850 — 374,560 378,410 CO Bond firm commitments — 54 — — 54 Mortgage delivery commitments — 68 — — 68 Total derivative assets — 3,972 — 374,560 378,532 Other assets 13,937 18,633 — — 32,570 Total assets carried at fair value on a recurring basis $ 13,937 $ 13,358,194 $ 62,265 $ 374,560 $ 13,808,956 Carried at fair value on a nonrecurring basis (2) Mortgage loans held for portfolio — — 3,860 — 3,860 REO — — 59 — 59 Total assets carried at fair value on a nonrecurring basis $ — $ — $ 3,919 $ — $ 3,919 Liabilities: Carried at fair value on a recurring basis Derivative liabilities Interest-rate-exchange agreements $ — $ (177,548) $ — $ 138,634 $ (38,914) CO Bond firm commitments — (30) — — (30) Total liabilities carried at fair value on a recurring basis $ — $ (177,578) $ — $ 138,634 $ (38,944) _______________________ (1) These amounts represent the effect of master-netting agreements intended to allow us to settle positive and negative positions and also cash collateral and related accrued interest held or placed with the same clearing member and/or counterparty. (2) We measure certain mortgage loans held for portfolio and REO at fair value on a nonrecurring basis, that is, they are not measured at fair value on an ongoing basis but are subject to fair-value adjustments only in certain circumstances. The fair values presented are as of the date the fair value adjustment was recorded. Table 15.3 presents a reconciliation of available-for-sale securities that are measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the years ended December 31, 2022, 2021, and 2020. Table 15.3 - Roll Forward of Level 3 Available-for-Sale Securities (dollars in thousands) For the Year ended December 31, 2022 2021 2020 HFA Securities HFA Securities HFA Securities Private-label MBS Balance at beginning of year $ 62,265 $ 122,549 $ 64,652 $ — Transfer of securities from held-to-maturity to available-for-sale — — 71,240 180,514 Total gains included in earnings Net gains on sale — — — 30,583 Reduction of provision for credit losses — — — 269 Accretion — — — 353 Total gains (losses) included in other comprehensive income Net unrealized (losses) gains (741) 3,316 6,517 (22,203) Sales, maturities, and settlements Sales — — — (187,366) Maturities (27,000) (61,320) (18,685) — Settlements (1,750) (2,280) (1,175) (2,150) Balance at end of year $ 32,774 $ 62,265 $ 122,549 $ — Total amount of unrealized (losses) gains for the period included in other comprehensive income relating to securities held at period end $ (960) $ 124 $ 5,823 $ —

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies [Text Block]	Commitments and Contingencies Joint and Several Liability. COs are backed by the financial resources of the FHLBanks. The FHFA has authority to require any FHLBank to repay all or a portion of the principal and interest on COs for which another FHLBank is the primary obligor. No FHLBank has ever been asked or required to repay the principal or interest on any CO on behalf of another FHLBank. We evaluate the financial condition of the other FHLBanks primarily based on known regulatory actions, publicly available financial information, and individual long-term credit-rating action as of each period-end presented. Based on this evaluation, as of December 31, 2022, and through the filing of this report, we do not believe it is likely that we will be required to repay the principal or interest on any CO on behalf of another FHLBank. We have considered applicable FASB guidance and determined it is not necessary to recognize a liability for the fair value of our joint and several liability for all of the COs. The joint and several obligation is mandated by the FHLBank Act, as implemented by FHFA regulations, and is not the result of an arms-length transaction among the FHLBanks. The FHLBanks have no control over the amount of the guaranty or the determination of how each FHLBank would perform under the joint and several obligation. Because the FHLBanks are subject to the authority of the FHFA as it relates to decisions involving the allocation of the joint and several liability for the FHLBanks' COs, the FHLBanks' joint and several obligation is excluded from the initial recognition and measurement provisions. Accordingly, we have not recognized a liability for our joint and several obligation related to other FHLBanks' COs at December 31, 2022 and 2021. The par amounts of other FHLBanks' outstanding COs for which we are jointly and severally liable totaled $1.1 trillion and $623.9 billion at December 31, 2022 and 2021, respectively. See Note 10 — Consolidated Obligations for additional information. Off-Balance-Sheet Commitments Table 16.1 - Off-Balance Sheet Commitments (1) (dollars in thousands) December 31, 2022 December 31, 2021 Expire within one year Expire after one year Total Expire within one year Expire after one year Total Standby letters of credit outstanding (2) $ 10,148,761 $ 77,521 $ 10,226,282 $ 5,369,701 $ 132,096 $ 5,501,797 Commitments for unused lines of credit - advances (3) 1,123,269 — 1,123,269 1,095,844 — 1,095,844 Commitments to make additional advances 57,024 29,010 86,034 40,917 66,318 107,235 Commitments to invest in mortgage loans 3,454 — 3,454 3,164 — 3,164 Unsettled CO bonds, at par 172,140 — 172,140 260,000 — 260,000 Unsettled CO discount notes, at par 32,480 — 32,480 — — — __________________________ (1) We have determined that it is unnecessary to record any liability for credit losses on these agreements. (2) The amount of standby letters of credit outstanding excludes commitments to issue standby letters of credit that expire within one year. At December 31, 2022 and 2021, these amounts totaled $22.0 million and $16.1 million, respectively. Also excluded are commitments to issue standby letters of credit that expire after one year totaling $125 thousand at December 31, 2021. (3) Commitments for unused line-of-credit advances are generally for periods of up to 12 months. Since many of these commitments are not expected to be drawn upon, the total commitment amount does not necessarily indicate future liquidity requirements. Standby Letters of Credit. For a fee we, issue standby letters of credit on behalf of our members to support certain obligations of the members to third-party beneficiaries. These standby letters of credit are generally subject to the same collateralization and borrowing limits similar to advances. Standby letters of credit may be offered to assist members and nonmember housing associates in facilitating residential housing finance, community lending, and asset-liability management, and to provide liquidity. In particular, members often use standby letters of credit as collateral for deposits from state and local government agencies. If we are required to make payment for a beneficiary's draw, our strategy is to take prompt action to recover the funds paid to the third-party beneficiary, including converting the payment amount into a collateralized advance to the primary obligor, withdrawing the payment amount from the primary obligor's demand deposit account with us, or selling collateral pledged by the primary obligor in a commercially reasonable manner to offset the payment amount. Historically, standby letters of credit usually expire without being drawn upon. At December 31, 2022, the outstanding standby letters of credit issued expire no later than 2032. Currently, we offer new standby letters of credit with terms typically up to 10 years, while terms greater than 10 years may be available on an exception basis. Unearned fees for the value of the guarantees related to standby letters of credit are recorded in other liabilities and totaled $1.2 million and $1.1 million at December 31, 2022 and 2021, respectively. We monitor the creditworthiness of our members and housing associates that have standby letter of credit agreements outstanding based on our evaluations of the financial condition of the member or housing associate. We review available financial data, which can include regulatory call reports filed by depository institution members, regulatory financial statements filed with the appropriate state insurance department by insurance company members, audited financial statements of housing associates, SEC filings, and rating-agency reports to ensure that potentially troubled members are identified as soon as possible. In addition, we have access to most members' regulatory examination reports. We analyze this information on a regular basis. Standby letters of credit are fully collateralized at the time of issuance. Based on our credit analyses and collateral requirements, we have not deemed it necessary to record any additional liability on these commitments. Commitments to Invest in Mortgage Loans. Commitments to invest in mortgage loans are generally for periods not to exceed 60 business days. Such commitments are recorded as derivatives at their fair values on the statement of condition. Pledged Collateral. We have pledged securities as collateral related to derivatives. See Note 8 — Derivatives and Hedging Activities for additional information about our pledged collateral and other credit-risk-related contingent features. Legal Proceedings . We are subject to various legal proceedings arising in the normal course of business from time to time. We would record an accrual for a loss contingency when it is probable that a loss has been incurred and the amount can be reasonably estimated. Management does not anticipate that the ultimate liability, if any, arising out of these matters will have a material effect on our financial condition, results of operations, or cash flows. Other commitments and contingencies are discussed in Note 6 — Advances , Note 8 — Derivatives and Hedging Activities , Note 10 — Consolidated Obligations , Note 11 — Affordable Housing Program , Note 12 — Capital , and Note 14 — Employee Retirement Plans .

Transactions with Shareholders

Transactions with Shareholders	12 Months Ended
	Dec. 31, 2022
Transactions with Shareholders [Abstract]
Transactions with Shareholders [Text Block]	Transactions with Shareholders We are a cooperative whose members own our capital stock and may receive dividends on their investment in our capital stock. In addition, certain former members and nonmembers that still have outstanding transactions with us are required to maintain their investment in our capital stock until the transactions mature or are paid off. All advances are issued to members or housing associates, and mortgage loans held for portfolio are generally acquired from our members or housing associates. We also maintain demand-deposit accounts for members and housing associates primarily to facilitate settlement activities that are directly related to advances, mortgage-loan purchases, and other transactions between us and the member or housing associate. In instances where the member has an officer or director who serves as a director of the Bank, those transactions are subject to the same eligibility and credit criteria, as well as the same terms and conditions, as transactions with all other members. Related Parties. We define related parties as members who owned 10 percent or more of the voting interests of our capital stock outstanding at year end. Each member eligible to vote is entitled to cast by ballot one vote for each share of stock that it was required to hold as of the record date, which is December 31, of the year prior to each election, subject to the limitation that no member may cast more votes than the average number of shares of our stock that is required to be held by all members located in such member's state. Under the FHLBank Act and FHFA regulations, each member directorship is designated to one of the six states in our district. Eligible members are permitted to vote all their eligible shares for one candidate for each open member directorship in the state in which the member is located and for each open independent directorship. A nonmember stockholder is not entitled to cast votes for the election of directors unless it was a member as of the record date. At December 31, 2022 and 2021, no shareholder owned more than 10 percent of the total voting interests due to statutory limits on members' voting rights, therefore, we did not have any related parties. Shareholder Concentrations. We consider shareholder concentrations as holdings of capital stock (including mandatorily redeemable capital stock) by individual members or nonmembers in excess of 10 percent of total capital stock outstanding at December 31, 2022. At December 31, 2021, no shareholder had more than 10 percent of total capital stock outstanding. Table 17.1 - Shareholder Concentrations, Balance Sheet (dollars in thousands) Capital Stock Percent Par Percent of Total Par Value Total Accrued Percent of Total December 31, 2022 Citizens Bank, N.A. $ 363,769 17.8 % $ 8,519,007 20.4 % $ 5,662 7.8 % Webster Bank, N.A. 221,408 10.8 5,460,552 13.1 9,942 13.6 We held sufficient collateral to support the advances to the above institution such that we do not expect to incur any credit losses on these advances. Transactions with Directors' Institutions. We provide, in the ordinary course of business, products and services to members whose officers or directors serve on our board of directors. In accordance with FHFA regulations, transactions with directors' institutions are conducted on the same terms as those with any other member. Table 17.2 - Transactions with Directors' Institutions (dollars in thousands) Capital Stock Percent Par Percent of Total Par Value Total Accrued Percent of Total December 31, 2022 $ 374,123 18.3 % $ 8,683,521 20.8 % $ 5,803 8.0 % December 31, 2021 48,104 5.0 416,542 3.4 466 2.8

Transactions with Other FHLBank

Transactions with Other FHLBanks	12 Months Ended
	Dec. 31, 2022
Transactions with Other FHLBanks [Abstract]
Transactions with Other FHLBanks [Text Block]	Transactions with Other FHLBanks We may occasionally enter into transactions with other FHLBanks. These transactions are summarized below. Overnight Funds . We may borrow or lend unsecured overnight funds from or to other FHLBanks. All such transactions are at current market rates. Interest income and interest expense related to these transactions with other FHLBanks are included within other interest income and interest expense from other borrowings in the statement of operations. During the years ended December 31, 2022 and 2020, we recorded $194 thousand and $48 thousand, respectively, in interest income on loans to other FHLBanks. Interest expense for loans from other FHLBanks was $307 thousand and $218 thousand for the years ended December 31, 2022 and 2020, respectively. There was no interest income nor interest expense on/for loans to/from other FHLBanks at December 31, 2021. MPF Mortgage Loans. We pay a transaction-services fee and a membership fee to the FHLBank of Chicago for our participation in the MPF program. For the years ended December 31, 2022, 2021, and 2020, we recorded $2.0 million, $2.4 million, and $2.9 million, respectively in MPF transaction-services fee expense to the FHLBank of Chicago which has been recorded in the statement of operations as other expense. The membership fee has been recorded in the statement of operations as an operating expense, and totaled $600 thousand for each of the years ended December 31, 2022, 2021, and 2020. In addition, we receive an MPF performance fee from the FHLBank of Chicago. The MPF performance fee for the years ended December 31, 2022, 2021, and 2020 amounted to $225 thousand, $125 thousand, and $50 thousand, respectively, and was recorded in the statement of operations as other income.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2022
Subsequent Events [Abstract]
Subsequent Events [Text Block]	Subsequent EventsOn February 24, 2023, the board of directors declared a cash dividend at an annualized rate of 6.67 percent based on daily average capital stock balances outstanding during the fourth quarter of 2022. The dividend, including dividends classified as interest on mandatorily redeemable capital stock, amounted to $31.2 million and was paid on March 2, 2023.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Use of Estimates, Policy	These financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP). The preparation of financial statements in accordance with GAAP requires management to make subjective assumptions and estimates that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities, and the reported amounts of income and expenses. The most significant of these estimates include but are not limited to, accounting for derivatives and hedging activities, estimation of fair values, and amortization of premiums and discounts associated with prepayable mortgage-backed securities. Actual results could differ from these estimates.
Fair Value Measurement, Policy	We determine the fair-value amounts recorded on the statement of condition and in the note disclosures for the periods presented by using available market and other pertinent information, and reflect our best judgment of appropriate valuation methods. Although we use our best judgment in estimating the fair value of these financial instruments, there are inherent limitations in any valuation technique. Therefore, these fair values may not be indicative of the amounts that would have been realized in market transactions at the reporting dates.
Derivatives, Offsetting Fair Value Amounts, Policy	We present certain financial instruments on a net basis when they are subject to a legal right of offset and all other requirements for netting are met (collectively referred to as the netting requirements). For these financial instruments, we have elected to offset our asset and liability positions, as well as cash collateral received or pledged, when we have met the netting requirements. The net exposure for these financial instruments can change on a daily basis; therefore, there may be a delay between the time this exposure change is identified and additional collateral is requested, and the time when this collateral is received or pledged. Likewise, there may be a delay for excess collateral to be returned. For derivative instruments that meet the requirements for netting, any excess cash collateral received or pledged is recognized as a derivative liability or derivative asset. See Note 8 — Derivatives and Hedging Activities for additional information regarding these agreements.
Investment, Policy	Interest-Bearing Deposits, Securities Purchased Under Agreements to Resell, and Federal Funds Sold We invest in interest-bearing deposits, securities purchased under agreements to resell, and federal funds sold. Interest-bearing deposits include bank notes not meeting the definition of a security. Securities purchased under agreements to resell are treated as short-term collateralized loans. Federal funds sold consist of short-term, unsecured loans transacted with counterparties that we consider to be of investment quality. These investments provide short-term liquidity and are carried at cost. Accrued interest receivable is recorded separately on the statements of condition. If applicable, an allowance for credit losses is recorded with a corresponding adjustment to the provision for credit losses. Interest-bearing deposits, securities purchased under agreements to resell, and federal funds sold are evaluated quarterly for expected credit losses if not expected to be repaid according to the contractual terms. We have not sold or repledged the collateral received on securities purchased under agreements to resell. We use the collateral maintenance provision practical expedient for securities purchased under agreements to resell. Consequently, a credit loss would be recognized if there is a collateral shortfall which we do not believe the counterparty will replenish in accordance with its contractual terms. The credit loss would be limited to the difference between the fair value of the collateral and the investment’s amortized cost. Investment Securities We classify investments as trading, available-for-sale, or held-to-maturity at the date of acquisition. Purchases and sales of securities are recorded on a trade date basis. Trading. Securities classified as trading are carried at fair value and we record changes in the fair value of these investments through other income as net unrealized (losses) gains on trading securities. FHFA regulations prohibit trading in or the speculative use of these instruments and limit the credit risks we have from these instruments. Available-for-sale. We classify certain investments that are not classified as held-to-maturity or trading as available-for-sale and carry them at fair value. Changes in fair value of available-for-sale securities not being hedged by derivatives, or in an economic hedging relationship, are recorded in other comprehensive income. For available-for-sale securities that have been hedged under fair-value hedge designations, we record the portion of the change in the fair value of the investment related to the risk being hedged in available-for-sale interest income together with the related change in the fair value of the derivative. For securities classified as available-for-sale, we evaluate individual securities for impairment on a quarterly basis by comparing the security’s fair value to its amortized cost. Accrued interest receivable is recorded separately on the statements of condition and is not included in the amortized cost basis. Impairment exists when the fair value of the investment is less than its amortized cost. If management does not intend to sell an impaired security classified as available-for-sale and it is not more likely than not that management will be required to sell the debt security, we assess whether a credit loss exists on an impaired security by considering whether there would be a shortfall in receiving all cash flows contractually due on the investment. When a shortfall is considered possible, we compare the present value of cash flows to be collected from the security with the amortized cost basis of the security. If the present value of cash flows is less than amortized cost, an allowance for credit losses is recorded with a corresponding adjustment to the provision for credit losses. The allowance is limited to the difference between the amortized cost and the fair value on the individual security and excludes uncollectible accrued interest receivable, which is measured separately. Any remaining difference between the security’s fair value and amortized cost is recorded to net unrealized gains (losses) on available-for-sale securities within other comprehensive income. If management intends to sell an impaired security classified as available-for-sale, or more likely than not will be required to sell the security before expected recovery of its amortized cost basis, any allowance for credit losses is written off and the amortized cost basis is written down to the security’s fair value at the reporting date with any incremental impairment reported in earnings as net losses on available-for-sale securities. Held-to-Maturity. Certain investments for which we have both the ability and intent to hold to maturity are classified as held-to-maturity and are carried at amortized cost, which is original cost net of periodic principal repayments and amortization of premiums and accretion of discounts using the level-yield method. Accrued interest receivable is recorded separately on the statement of condition. Certain changes in circumstances may cause us to change our intent to hold a security to maturity without calling into question our intent to hold other debt securities to maturity in the future. Thus, the sale or transfer of a held-to-maturity security due to certain changes in circumstances, such as evidence of significant deterioration in the issuer's creditworthiness or changes in regulatory requirements, is not considered to be inconsistent with its original classification. Other events that are isolated, nonrecurring, and unusual for us that could not have been reasonably anticipated may cause us to sell or transfer a held-to-maturity security without necessarily calling into question our intent to hold other debt securities to maturity. In addition, sale of a debt security that meets either of the following two conditions would not be considered inconsistent with the original classification of that security. • The sale occurs near enough to its maturity date (for example, within three months of maturity), or call date if exercise of the call is probable, that interest-rate risk is substantially eliminated as a pricing factor and the changes in market interest rates would not have a significant effect on the security's fair value; or • The sale of a security occurs after we have already collected a substantial portion (at least 85 percent) of the par value at acquisition due either to prepayments on the debt security or to scheduled payments on a debt security payable in equal installments (both principal and interest) over its term. For any improvements in expected future cash flows for held-to-maturity securities with an allowance for credit losses recognized, the allowance for credit losses associated with recoveries may be derecognized up to its full amount immediately in the current period. Premiums and Discounts. We amortize premiums and accrete discounts on mortgage-backed securities (MBS) using the level-yield method over the estimated lives of the securities. This method requires a retrospective adjustment of the effective yield each time we change the estimated life, based on actual prepayments received and changes in expected prepayments, as if the new estimate had been known since the original acquisition date of the securities. We estimate prepayment speeds on each individual security using the most recent three months of historical constant prepayment rates, as available, or may subscribe to third-party data services that provide estimates of future cash flows, from which we determine expected asset lives. We amortize premiums and accrete discounts on other investments using the level-yield method to the contractual maturity of the securities. Gains and Losses on Sales. We compute gains and losses on sales of investment securities using the specific identification method and include these gains and losses in other income (loss).
Federal Home Loan Bank Advances , Policy	Advances Advances are carried at amortized cost, which is original cost net of periodic principal repayments, amortization of premiums and accretion of discounts, and fair value hedge adjustments, as discussed in Note 6 — Advances . Advances are evaluated quarterly for expected credit losses. We generally record our advances at par. However, we may record premiums or discounts on advances in the following cases: • Advances may be acquired from another FHLBank when one of our members acquires a member of another FHLBank. In these cases, we may purchase the advances from the other FHLBank at a price that results in a fair market yield for the acquired advance. • When the prepayment of an advance is followed by disbursement of a new advance and the transactions effectively represent a modification of the previous advance, the prepayment fee received is deferred and recorded as a discount to the modified advance. • When an advance is modified under our advance restructuring program and our analysis of the restructuring concludes that the transaction is an extinguishment of the prior advance rather than a modification, the deferred prepayment fee is recognized into income immediately and recorded as a premium on the new advance. • When we make an AHP advance, the present value of the variation in the cash flow caused by the difference in the interest rate between the AHP advance rate and our related cost of funds for comparable maturity funding is charged against the AHP liability and recorded as a discount on the AHP advance. • Advances issued under our Jobs for New England (JNE) and Helping to House New England (HHNE) programs have an interest rate at a significant discount to market rates. Due to the below market interest rate, we record a discount on the advance and an interest rate subsidy expense based on the present value of the variation in the cash flow caused by the difference in the interest rate between the advance rate and our related cost of funds for comparable maturity funding at the time that we transact the advance. The subsidy expenses for JNE and HHNE advances, and for our Housing Our Workforce (HOW) grant program, are recorded in JNE, HHNE and HOW subsidy expense in the statement of operations. We amortize the premiums and accrete the discounts on advances to interest income using the level-yield method. We record interest on advances to interest income as earned. Accrued interest receivable is recorded separately on the statements of condition. Prepayment Fees. We charge borrowers a prepayment fee when they prepay certain advances before the original maturity. We record prepayment fees net of hedging fair-value adjustments included in the carrying value of the advance as prepayment fees on advances, net in the interest income section of the statement of operations. Advance Modifications. In cases in which we fund a new advance concurrently with or within a short period of time of the prepayment of an existing advance by the same member, we evaluate whether the new advance meets the accounting criteria to qualify as a modification of the existing advance or whether it constitutes a new advance. We compare the present value of cash flows on the new advance with the present value of cash flows remaining on the existing advance. If there is at least a 10 percent difference in the present value of cash flows or if we conclude the difference between the advances is more than minor based on a qualitative assessment of the modifications made to the advance's original contractual terms, the advance is accounted for as a new advance. In all other instances, the new advance is accounted for as a modification. If a new advance qualifies as a modification of the existing advance, the net prepayment fee on the prepaid advance is deferred, recorded in the basis of the modified advance, and amortized to interest income over the life of the modified advance using the level-yield method. This amortization is recorded in advance interest income. If the modified advance is hedged, changes in fair value are recorded after the amortization of the basis adjustment in advance interest income. For prepaid advances that were hedged and meet the hedge-accounting requirements, we terminate the hedging relationship upon prepayment and record the prepayment fee net of the hedging fair-value adjustment in the basis of the advance as advance interest income. If we fund a new advance to a member concurrent with or within a short period of time after the prepayment of a previous advance to that member, we evaluate whether the new advance qualifies as a modification of the original hedged advance. If the new advance qualifies as a modification of the original hedged advance, the hedging fair-value adjustment and the prepayment fee are included in the carrying amount of the modified advance and are amortized in interest income over the life of the modified advance using the level-yield method. If the modified advance is also hedged and the hedge meets the hedging criteria, the modified advance is marked to fair value after the modification, and subsequent fair-value changes are recorded in advance interest income. If a new advance does not qualify as a modification of an existing advance, prepayment of the existing advance is treated as an advance termination and any prepayment fee, net of hedging adjustments, is recorded to advance interest income in the statement of operations.
Commitment Fees, Policy	Commitment FeesWe record commitment fees for standby letters of credit to members as deferred fee income when received, and amortize these fees on a straight-line basis to service-fees income in other income over the term of the standby letter of credit. Based upon past experience, we believe the likelihood of standby letters of credit being drawn upon is remote.
Loans and Leases Receivables, Held For Portfolio, Policy	We classify our investments in mortgage loans for which we have the intent and ability to hold for the foreseeable future or until maturity or payoff as held for portfolio.Mortgage loans held for portfolio are recorded at amortized cost, which is original cost, net of periodic principal repayments and amortization of premiums and accretion of discounts, and direct write-downs. Accrued interest receivable is recorded separately on the statements of condition. We perform a quarterly assessment of our mortgage loans held for portfolio to estimate expected credit losses. An allowance for credit losses is recorded with a corresponding adjustment to the provision for credit losses. We do not purchase mortgage loans with credit deterioration present at the time of purchase. Quarterly we measure expected credit losses on mortgage loans on a collective basis, pooling loans with similar risk characteristics. If a mortgage loan no longer shares risk characteristics with other loans, it is removed from the pool and evaluated for expected credit losses on an individual basis. When developing the allowance for credit losses, we measure the expected loss over the estimated remaining life of a mortgage loan, which also considers how our credit enhancements mitigate credit losses. If a loan is purchased at a discount, the discount does not offset the allowance for credit losses. We include estimates of expected recoveries within the allowance for credit losses.
Loans and Leases Receivable, Origination Fees, Discounts or Premiums, and Direct Costs to Acquire Loans, Policy	We compute the amortization of mortgage-loan-origination fees (premiums and discounts) as interest income using the level-yield method over the contractual term to maturity of each individual loan, which results in income recognition in a manner that is effectively proportionate to the actual repayment behavior of the underlying assets and reflects the contractual terms of the assets without regard to changes in estimated prepayments based on assumptions about future borrower behavior.Credit-enhancement fees are recorded as an offset to mortgage-loan-interest income.We record other nonorigination fees in connection with our MPF program activities in other income. Such fees include delivery-commitment-extension fees, pair-off fees, price-adjustment fees, and counterparty fees in connection with MPF products under which we facilitate third party investment in loans (non-investment MPF products) such as with the MPF Xtra® product. Delivery-commitment-extension fees are charged when a participating financial institution requests to extend the period of the delivery commitment beyond the original stated expiration. Pair-off fees represent a make-whole provision; they are received when the amount funded under a delivery commitment is less than a certain threshold (under-delivery) of the delivery-commitment amount. Price-adjustment fees are received when the amount funded is greater than a certain threshold (over-delivery) of the delivery-commitment amount. To the extent that pair-off fees relate to under-deliveries of loans, they are recorded in service fee income. Fees related to over-deliveries represent purchase-price adjustments to the related loans acquired and are recorded as part of the carrying value of the loan.
Loans and Leases Receivable, Nonaccrual Loan and Lease Status, Policy	We place conventional mortgage loans on nonaccrual status when the collection of interest or principal is doubtful or contractual principal or interest is 90 days or more past due. When a conventional mortgage loan is placed on nonaccrual status, accrued but uncollected interest is reversed against interest income in the current period. We generally record cash payments received on nonaccrual loans first as interest income and then as a reduction of principal as specified in the contractual agreement unless we consider the collection of the remaining principal amount due to be doubtful. If we consider the collection of the remaining principal amount to be doubtful, cash payments received are applied first solely to principal until the remaining principal amount due is expected to be collected and then as a recovery of any charge-off, if applicable, followed by recording interest income. A loan on nonaccrual status may be restored to accrual status when the collection of the contractual principal and interest is less than 90 days past due. We do not place government mortgage loans on nonaccrual status when the collection of the contractual principal or interest is 90 days or more past due because of the U.S. government guarantee of the loan and the contractual obligations of each related servicer,
Impaired Financing Receivable, Policy	Collateral-dependent Loans. A loan is considered collateral-dependent when the borrower is experiencing financial difficulty and repayment is expected to be substantially through the sale of the underlying collateral. A loan that is considered collateral-dependent is measured for credit loss on an individual basis based on the fair value of the underlying property less estimated selling costs, with any shortfall recognized as an allowance for credit losses or charged-off. Charge-Off Policy. A charge-off is recorded if it is estimated that the recorded investment in a loan will not be recovered. The recorded investment in a loan is the par value of the loan, adjusted for accrued interest, net deferred loan fees or costs, unamortized premiums or discounts, hedging adjustments, and direct write-downs. We evaluate whether to record a charge-off on a conventional mortgage loan upon the occurrence of a confirming event. Confirming events include, but are not limited to, the occurrence of foreclosure or notification of a claim against any of the credit-enhancements. We charge off the portion of outstanding conventional mortgage loan balances in excess of fair value of the underlying property less estimated selling costs, and adjusted for any available credit-enhancements for loans that are 180 or more days past due, when the borrower has filed for bankruptcy protection and the loan is at least 30 days past due, or when there is evidence of fraud.
Loans and Leases Receivable, Troubled Debt Restructuring, Policy	Troubled Debt Restructurings. We consider a troubled debt restructuring (TDR) of a financing receivable to have occurred when we grant a concession to a borrower that we would not otherwise consider for economic or legal reasons related to the borrower's financial difficulties. We place conventional mortgage loans that are deemed to be TDRs as a result of our modification program on nonaccrual when payments are 60 days or more past due.
Derivatives, Policy	Derivatives and Hedging Activities All derivatives are recognized on the statement of condition at fair value and are reported as either derivative assets or derivative liabilities, net of cash collateral and accrued interest received from or pledged to clearing members and/or counterparties. We offset fair-value amounts recognized for derivatives and fair-value amounts recognized for the right to reclaim cash collateral (a receivable) or the obligation to return cash collateral (a payable) arising from derivatives recognized at fair value executed with the same clearing member and/or counterparty when the netting requirements have been met. If these netted amounts are positive, they are classified as an asset and, if negative, they are classified as a liability. Derivative assets and derivative liabilities reported on the statement of condition also include net accrued interest. Cash flows associated with derivatives are reflected as cash flows from operating activities in the statement of cash flows unless the derivative meets the criteria to be a financing derivative. Each derivative is designated as one of the following: • a qualifying hedge of the change in fair value of a recognized asset or liability or an unrecognized firm commitment (a fair value hedge); • a qualifying hedge of a forecasted transaction (a cash-flow hedge); or • a nonqualifying hedge of an asset or liability (an economic hedge) for asset-liability-management purposes. We utilize two derivatives clearing organizations (DCOs), for all cleared derivative transactions, Chicago Mercantile Exchange, Inc. (CME Inc.) and LCH Limited (LCH Ltd.). At both DCOs, variation margin is characterized as daily settlement payments and initial margin is considered collateral. Accounting for Fair-Value and Cash-Flow Hedges. If hedging relationships meet certain criteria, including, but not limited to, formal documentation of the hedging relationship and an expectation to be highly effective, they qualify for fair-value or cash-flow hedge accounting. For cash-flow hedges, we measure effectiveness using the hypothetical derivative method, which compares the cumulative change in fair value of the actual derivative designated as the hedging instrument to the cumulative change in fair value of a hypothetical derivative having terms that identically match the critical terms of the hedged forecasted transaction. Derivatives that are used in fair-value hedges are typically executed at the same time as the hedged items, and we designate the hedged item in a qualifying hedging relationship as of the trade date. We then record the changes in fair value of the derivative and the hedged item beginning on the trade date. Changes in the fair value of a derivative that is designated and qualifies as a fair-value hedge, along with changes in the fair value of the hedged asset or liability that are attributable to the hedged risk, are recorded in net interest income in the same line as the earnings effect of the hedged item. Changes in the fair value of a derivative that is designated and qualifies as a cash-flow hedge are recorded in other comprehensive income, a component of capital, until the hedged transaction affects earnings. Accounting for Economic Hedges. An economic hedge is defined as a derivative hedging specific or nonspecific assets, liabilities, or firm commitments that does not qualify or was not designated for fair-value or cash-flow hedge accounting, but is an acceptable hedging strategy under our risk-management policy. These economic hedging strategies also comply with FHFA regulatory requirements prohibiting speculative derivative transactions. An economic hedge introduces the potential for earnings variability caused by the changes in fair value of the derivatives that are recorded in income but not offset by corresponding changes in the fair value of the economically hedged assets, liabilities, or firm commitments. As a result, we recognize only the net interest and the change in fair value of these derivatives in other income (loss) as net gains (losses) on derivatives with no offsetting fair-value adjustments for the economically hedged assets, liabilities, or firm commitments. Accrued Interest Receivable and Payable. The differential between accrual of interest receivable and payable on derivatives designated as a fair-value hedge or as a cash-flow hedge is recognized through adjustments to the interest income or interest expense of the designated hedged investment securities, advances, COs, or other financial instruments. The differential between accrual of interest receivable and payable on economic hedges is recognized in other income (loss), along with changes in fair value of these derivatives, as net gains (losses) on derivatives. Discontinuance of Hedge Accounting. We may discontinue hedge accounting prospectively when: • we determine that the derivative is no longer highly effective in offsetting changes in the fair value or cash flows of a hedged item attributable to the hedged risk (including hedged items such as firm commitments or forecasted transactions); • the derivative and/or the hedged item expires or is sold, terminated, or exercised; • it is no longer probable that the forecasted transaction in a cash-flow hedge will occur in the originally expected period or within the following two months; • a hedged firm commitment in a fair-value hedge no longer meets the definition of a firm commitment; or • we determine that designating the derivative as a hedging instrument is no longer appropriate. If hedge accounting is discontinued because we determine that the derivative no longer qualifies as an effective fair-value hedge of an existing hedged item, we either terminate the derivative or continue to carry the derivative on the statement of condition at its fair value and cease to adjust the hedged asset or liability for changes in fair value. We will then begin to amortize the cumulative basis adjustment on the hedged item into earnings over the remaining life of the hedged item using the level-yield method. If hedge accounting is discontinued because we determine that the derivative no longer qualifies as an effective cash-flow hedge of an existing hedged item, we will continue to carry the derivative on the statement of condition at its fair value and amortize the cumulative other comprehensive income adjustment to earnings when earnings are affected by the existing hedged item. If it is no longer probable that a forecasted transaction will occur by the end of the originally expected period or within two months thereafter, we immediately recognize in earnings the gain or loss that was in accumulated other comprehensive income. If hedge accounting is discontinued because the hedged item no longer meets the definition of a firm commitment, we will continue to carry the derivative on the statement of condition at its fair value, removing from the statement of condition any asset or liability that was recorded to recognize the firm commitment and recording it as a gain or loss in current period earnings. Managing Credit Risk on Derivatives. We are subject to credit risk on our hedging activities due to the risk of nonperformance by nonmember counterparties (including DCOs and their clearing members acting as agent to the DCOs as well as uncleared counterparties) to the derivative agreements. We manage credit risk through credit analysis, collateral requirements and adherence to the requirements set forth in our policies, U.S. Commodity Futures Trading Commission (the CFTC) regulations, and FHFA regulations.
Derivatives, Embedded Derivatives, Policy	Embedded Derivatives. We may issue debt, make advances, or purchase financial instruments in which a derivative is embedded. Upon execution of these transactions, we assess whether the economic characteristics of the embedded derivative are clearly and closely related to the economic characteristics of the remaining component of the debt, advance, or other financial instrument (the host contract) and whether a separate, nonembedded instrument with the same terms as the embedded instrument would meet the definition of a derivative. When we determine that (1) the embedded derivative has economic characteristics that are not clearly and closely related to the economic characteristics of the host contract and (2) a separate, stand-alone instrument with the same terms would qualify as a derivative instrument, the embedded derivative is separated from the host contract, carried at fair value, and designated as a stand-alone derivative instrument. If the entire contract (the host contract and the embedded derivative) is to be measured at fair value, with changes in fair value reported in current earnings (for example, an investment security classified as trading, as well as hybrid financial instruments) or if we cannot reliably identify and measure the embedded derivative for purposes of separating that derivative from its host contract, the entire contract is carried on the statement of condition at fair value and no portion of the contract is designated as a hedging instrument.
Property, Plant and Equipment, Policy [Policy Text Block]	Premises, Software, Equipment and LeasesWe record premises, software, and equipment at cost less accumulated depreciation and amortization and compute depreciation on a straight-line basis over estimated useful lives ranging from three years to 10 years. We amortize leasehold improvements on a straight-line basis over the shorter of the estimated useful life of the improvement or the remaining term of the lease. We capitalize improvements and major renewals but expense ordinary maintenance and repairs when incurred. We include gains and losses on disposal of premises, software, and equipment in other income (loss) on the statement of operations.
Internal Use Software, Policy [Policy Text Block]	The cost of purchased software and certain costs incurred in developing computer software for internal use are capitalized and amortized over future periods.
Lessee, Leases [Policy Text Block]	For leases with a term of 12 months or less, we have made an accounting policy election to not recognize lease right-of-use assets and lease liabilities.
Debt, Policy	Consolidated Obligations We record COs at amortized cost. Discounts and Premiums. We accrete discounts and amortize premiums on COs to interest expense using the level-yield method over the contractual term to maturity of the CO. Concessions on COs. We pay concessions to dealers in connection with the issuance of certain COs. The Office of Finance prorates the amounts paid to dealers based upon the percentage of debt issued that we assumed. We record concessions paid on COs as a direct reduction from their carrying amounts, consistent with the presentation of discounts on COs. These dealer concessions are amortized using the level-yield method over the contractual term to maturity of the COs. The amortization of those concessions is included in CO interest expense on the statement of operations.
Off-Balance-Sheet Credit Exposure, Policy	We evaluate our off-balance sheet credit exposures on a quarterly basis for expected credit losses. If deemed necessary, an allowance for expected credit losses on these off-balance sheet exposures is recorded in other liabilities with a corresponding adjustment to the provision for credit losses.
Shares Subject to Mandatory Redemption, Changes in Redemption Value, Policy	Mandatorily Redeemable Capital Stock We reclassify stock subject to redemption from equity to a liability after a member exercises a written redemption request, gives notice of intent to withdraw from membership, or attains nonmember status by merger or acquisition, charter termination, or other involuntary termination from membership, since the shares meet the definition of a mandatorily redeemable financial instrument upon such instances. Member shares meeting this definition are reclassified to a liability at fair value. Dividends declared on mandatorily redeemable capital stock are accrued at the expected dividend rate for Class B stock and reflected as interest expense on the statement of operations. The repayment of these mandatorily redeemable financial instruments is reflected as cash outflows in the financing activities section of the statement of cash flows once settled. We do not take into consideration our members' right to cancel a redemption request in determining when shares of capital stock should be classified as a liability because such cancellation would be subject to a cancellation fee equal to two percent of the par amount of the shares of Class B stock that is the subject of the redemption notice. If a member cancels its written notice of redemption or notice of withdrawal, we will reclassify mandatorily redeemable capital stock from a liability to equity. After the reclassification, dividends on the capital stock will no longer be classified as interest expense. Mandatorily Redeemable Capital Stock. We will reclassify capital stock subject to redemption from equity to liability once a member exercises a written notice of redemption, gives notice of intent to withdraw from membership, or attains nonmember status by merger or acquisition, charter termination, or involuntary termination from membership. Dividends related to capital stock classified as a liability are accrued at the expected dividend rate and reported as interest expense in the statement of operations. If a member cancels its written notice of redemption or notice of withdrawal, we will reclassify mandatorily redeemable capital stock from a liability to equity. After the reclassification, dividends on the capital stock would no longer be classified as interest expense. A member may cancel or revoke its written notice of redemption or its notice of withdrawal from membership prior to the end of the redemption-notice period. Our capital plan provides that we will charge the member a cancellation fee in the amount of 2.0 percent of the par amount of the shares of Class B stock that is the subject of the redemption notice. We will assess a redemption-cancellation fee unless the board of directors decides that it has a bona fide business purpose for waiving the imposition of the fee, and such a waiver is consistent with the FHLBank Act. Excess Capital Stock Repurchases. Our capital plan provides us with the sole discretion to repurchase capital stock from a member at par value that is in excess of the amount required to meet the member's total stock investment requirement (excess capital stock) subject to all applicable limitations. In conducting any repurchases, we repurchase any shares that are the subject of an outstanding redemption notice from the member from whom we are repurchasing prior to repurchasing any other shares that are in excess of the member's total stock-investment requirement (TSIR). We generally repurchase excess stock held by any shareholder whose excess stock exceeds the lesser of $3.0 million or 3.00 percent of the shareholder’s total stock investment requirement, subject to a minimum repurchase of $100,000. We plan to continue with this practice, subject to regulatory requirements and our anticipated liquidity or capital management needs, although continued repurchases remain at our sole discretion, and we retain authority to suspend repurchases of excess stock from any shareholder or all shareholders without prior notice. In addition to these daily repurchases, subject to our sole discretion shareholders may request that we voluntarily repurchase excess stock shares at any time. We may also allow the member to sell the excess capital stock at par value to another one of our members.
Restricted Retained Earnings [Policy Text Block]	Restricted Retained EarningsThe joint capital enhancement agreement, as amended (the Joint Capital Agreement), provides that each FHLBank will, on a quarterly basis, contribute 20 percent of its net income to a separate restricted retained earnings account until the balance of that account, calculated as of the last day of each calendar quarter, equals at least 1 percent of that FHLBank's average balance of outstanding COs (excluding fair-value adjustments) for the calendar quarter.
Gains On Litigation Settlements, Policy	Litigation Settlements Litigation settlement gains, net of related legal expenses, are recorded in other income (loss). A litigation settlement gain is considered realized and recorded when we receive cash or assets that are readily convertible to known amounts of cash or claims to cash. In addition, a litigation settlement gain is considered realizable and recorded when we enter into a signed
Regulator Expenses Cost Assessed On Federal Home Loan Bank [Policy Text Block]	FHFA Expenses We fund a portion of the costs of operating the FHFA. The portion of the FHFA's expenses and working capital fund paid by the FHLBanks is allocated among the FHLBanks based on the ratio of each FHLBank's minimum required regulatory capital to the aggregate minimum required regulatory capital of every FHLBank. We must pay an amount equal to one-half of our annual assessment twice each year.
Office Of Finance Cost Assessed on Federal Home Loan Bank [Policy Text Block]	Office of Finance ExpensesEach FHLBank's proportionate share of Office of Finance operating and capital expenditures has been calculated using a formula based upon the following components: (1) two-thirds based upon each FHLBank's share of total COs outstanding and (2) one-third divided equally among the FHLBanks.
Federal Home Loan Bank Assessments, Policy	AssessmentsAffordable Housing Program. The FHLBank Act requires us to establish and fund an AHP based on positive annual net earnings, providing grants to members to assist in the purchase, construction, or rehabilitation of housing for very low and low- or moderate-income households. We charge the required funding as well as any discretionary funding for the AHP to earnings and establish a liability, except when annual net earnings are zero or negative, in which case there is no requirement to fund an AHP. We also issue AHP advances at interest rates below the customary interest rate for nonsubsidized advances. A discount on the AHP advance and charge against the AHP liability is recorded for the present value of the variation in the cash flow caused by the difference in the interest rate between the AHP advance rate and our related cost of funds for comparable maturity funding. The discount on AHP advances is accreted to interest income on advances using the level-yield method over the life of the advance.
Cash and Cash Equivalents, Policy	Cash Flows In the statement of cash flows, we consider noninterest bearing cash and due from banks as cash and cash equivalents. Federal funds sold and interest-bearing deposits are not treated as cash equivalents for purposes of the statement of cash flows, but are instead treated as short-term investments and are reflected in the investing activities section of the statement of cash flows.
Segment Reporting, Policy [Policy Text Block]	Segment Reporting We report on an enterprise-wide basis. The enterprise-wide method of evaluating our financial information reflects the manner in which the chief operating decision-maker manages the business.
Reclassification, Policy	ReclassificationCertain amounts in the 2021 and 2020 financial statements have been reclassified to conform to the financial statement presentation for the year ended December 31, 2022
Federal Home Loan Bank Advances, Prepayment Fees, Policy [Policy Text Block]	We record prepayment fees received from borrowers on certain prepaid advances net of any associated basis adjustments related to hedging activities on those advances and net of deferred prepayment fees on advance prepayments considered to be loan modifications. Additionally, for certain advances products, the prepayment-fee provisions of the advance agreement could result in either a payment from the borrower or to the borrower when such an advance is prepaid, based upon market conditions at the time of prepayment (referred to as a symmetrical prepayment fee). Advances with a symmetrical prepayment fee provision are hedged with derivatives containing offsetting terms, so that we are financially indifferent to the borrower's decision to prepay such advances. The net amount of prepayment fees is reflected as interest income in the statement of operations.
Fair Value of Financial Instruments, Policy [Policy Text Block]	Summary of Valuation Methodologies and Primary Inputs The valuation methodologies and primary inputs used to develop the measurement of fair value for assets and liabilities that are measured at fair value on a recurring or nonrecurring basis in the Statement of Condition are listed below. The fair values and level within the fair value hierarchy of these assets and liabilities are reported in Table 15.2. Investment Securities. We determine the fair values of our investment securities, other than HFA floating-rate securities, based on prices obtained for each of these securities that we request from multiple designated third-party pricing vendors. The fair value of each such security is the average of such vendor prices that are within a cluster pricing tolerance range. A cluster is defined as a group of available vendor prices for a given security that is within a defined price tolerance range of the median vendor price depending on the security type. An outlier is any vendor price that is outside of the defined cluster and is evaluated for reasonableness. All prices that are within a specified tolerance threshold of the median price are included in the cluster of prices that are averaged to compute a default price. Vendor prices that are outside of a defined cluster are identified as outliers and are subject to additional review including, but not limited to, comparison to prices provided by an additional third-party valuation vendor, prices for similar securities, and/or nonbinding dealer estimates, or the use of internal model prices, which we believe reflect the facts and circumstances that a market participant would consider. We also perform this analysis in those limited instances where no third-party vendor price or only one third-party vendor price is available to determine fair value. If the analysis indicates that an outlier is not representative of fair value and that the average of the vendor prices within the tolerance threshold of the median price is the best estimate, then we use the average of the vendor prices within the tolerance threshold of the median price as the final price. If, on the other hand, we determine that an outlier (or some other price identified in the analysis) is a better estimate of fair value, then the outlier (or the other price as appropriate) is used as the final price. In all cases, the final price is used to determine the fair value of the security. As of December 31, 2022, multiple vendor prices were received for substantially all of our investment securities and the final prices for substantially all of those securities were computed by averaging the prices received. The relative proximity of the prices received supports our conclusion that the final computed prices are reasonable estimates of fair value. Our fixed-rate HFA securities fall within Level 3 of the fair-value hierarchy due to the current lack of market activities for these bonds. Investment Securities – HFA Floating Rate Securities. The fair value is determined by calculating the present value of the expected future cash flows. The discount rates used in these calculations are the rates for securities with similar terms. Our floating rate HFA securities fall within Level 3 of the fair-value hierarchy due to the current lack of market activity for these bonds. Mortgage Loans. The fair value of impaired conventional mortgage loans is based on the lower of the carrying value of the loans or fair value of the collateral less estimated costs to sell. The fair value of impaired government mortgage loans is equal to the par value. REO. Fair value is derived from third-party valuations of the property, which fall within Level 3 of the fair-value hierarchy. Derivative Assets/Liabilities - Interest-Rate-Exchange Agreements . We base the fair values of interest-rate-exchange agreements on available market prices of derivatives having similar terms, including accrued interest receivable and payable. The fair-value methodology uses standard valuation techniques for derivatives such as discounted cash-flow analysis and comparisons with similar instruments. The fair values of all interest-rate-exchange agreements are netted by clearing member and/or by counterparty, including cash collateral received from or delivered to the counterparty. If these netted amounts are positive, they are classified as an asset, and if negative, they are classified as a liability. We generally use a midmarket pricing convention based on the bid-ask spread as a practical expedient for fair-value measurements. Because these estimates are made at a specific point in time, they are susceptible to material near-term changes. We have evaluated the potential for the fair value of the instruments to be affected by counterparty risk and our own credit risk and have determined that no adjustments were significant to the overall fair-value measurements. The discounted cash-flow model uses market-observable inputs (inputs that are actively quoted and can be validated to external sources), including the following: • Discount rate assumption . For all derivatives cleared through a DCO the discount rate used is SOFR. For our bilateral, non-cleared interest-rate derivatives the discount rate used is either SOFR, OIS, or the LIBOR swap curve depending on the terms of the International Swaps and Derivatives Association (ISDA) agreement we have with each derivative counterparty. • Forward interest-rate assumption . Forward rates implied by the LIBOR swap curve, forward rates based on the OIS swap curve or forward rates implied by the SOFR swap curve. • Volatility assumption . Market-based expectations of future interest-rate volatility implied from current market prices for similar options. Derivative Assets/Liabilities – Commitments to Invest in Mortgage Loans . Commitments to invest in mortgage loans are recorded as derivatives in the statement of condition. The fair values of such commitments are based on the end-of-day delivery commitment prices provided by the FHLBank of Chicago and a spread, derived from MBS TBA delivery commitment prices with adjustment for the contractual features of the MPF program, such as servicing and credit-enhancement features.
Joint and Several Liability Policy [Policy Text Block]	We evaluate the financial condition of the other FHLBanks primarily based on known regulatory actions, publicly available financial information, and individual long-term credit-rating action as of each period-end presented.

Investments (Tables)

Investments (Tables)	12 Months Ended
	Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block]	Table 5.1 - Trading Securities by Major Security Type (dollars in thousands) December 31, 2022 December 31, 2021 Corporate bonds $ 1,507 $ 1,442 U.S. Treasury obligations — 500,425 Total $ 1,507 $ 501,867
Gain (Loss) on Securities [Table Text Block]	Table 5.2 - Net Gains (Losses) on Trading Securities (dollars in thousands) For the Year Ended December 31, 2022 2021 2020 Net gains (losses) on trading securities held at year end $ 65 $ (9,049) $ (8,392) Net losses on trading securities sold or matured during the year (425) (37,292) (3,544) Net losses on trading securities $ (360) $ (46,341) $ (11,936)
Schedule of Available-for-sale Securities Reconciliation [Table Text Block]	Table 5.3 - Available-for-Sale Securities by Major Security Type (dollars in thousands) December 31, 2022 Amounts Recorded in Accumulated Other Comprehensive Income Amortized Cost (1) Unrealized Unrealized Fair U.S. Treasury obligations $ 5,732,249 $ 2,784 $ (11,471) $ 5,723,562 State housing-finance-agency obligations (HFA securities) 34,580 — (1,806) 32,774 Supranational institutions 355,767 33 (5,448) 350,352 U.S. government-owned corporations 253,490 — (26,290) 227,200 GSE 104,530 — (6,864) 97,666 6,480,616 2,817 (51,879) 6,431,554 MBS U.S. government guaranteed – single-family 18,737 — (2,589) 16,148 U.S. government guaranteed – multifamily 531,184 — (54,454) 476,730 GSE – single-family 831,304 251 (66,029) 765,526 GSE – multifamily 6,115,356 322 (178,720) 5,936,958 7,496,581 573 (301,792) 7,195,362 Total $ 13,977,197 $ 3,390 $ (353,671) $ 13,626,916 December 31, 2021 Amounts Recorded in Accumulated Other Comprehensive Income Amortized Cost (1) Unrealized Unrealized Fair U.S. Treasury obligations $ 5,081,536 $ 3,380 $ (370) $ 5,084,546 HFA securities 63,330 2 (1,067) 62,265 Supranational institutions 409,337 96 (5,668) 403,765 U.S. government-owned corporations 325,567 — (18,703) 306,864 GSE 130,143 — (3,671) 126,472 6,009,913 3,478 (29,479) 5,983,912 MBS U.S. government guaranteed – single-family 21,435 100 — 21,535 U.S. government guaranteed – multifamily 541,238 219 (52) 541,405 GSE – single-family 1,093,890 9,945 (121) 1,103,714 GSE – multifamily 5,171,498 99,119 (25,196) 5,245,421 6,828,061 109,383 (25,369) 6,912,075 Total $ 12,837,974 $ 112,861 $ (54,848) $ 12,895,987 _______________________ (1) Amortized cost of available-for-sale securities includes adjustments made to the cost basis of an investment for accretion, amortization, collection of cash, and fair-value hedge accounting adjustments. Amortized cost excludes accrued interest receivable
Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table Text Block]	Table 5.4 - Available-for-Sale Securities in a Continuous Unrealized Loss Position (dollars in thousands) December 31, 2022 Continuous Unrealized Loss Less than 12 Months Continuous Unrealized Loss 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized U.S. Treasury obligations $ 2,792,558 $ (7,428) $ 1,077,821 $ (4,043) $ 3,870,379 $ (11,471) HFA securities 10,383 (77) 22,391 (1,729) 32,774 (1,806) Supranational institutions — — 337,485 (5,448) 337,485 (5,448) U.S. government-owned corporations — — 227,200 (26,290) 227,200 (26,290) GSE — — 97,666 (6,864) 97,666 (6,864) 2,802,941 (7,505) 1,762,563 (44,374) 4,565,504 (51,879) MBS U.S. government guaranteed – single-family 16,148 (2,589) — — 16,148 (2,589) U.S. government guaranteed – multifamily 310,447 (36,177) 166,283 (18,277) 476,730 (54,454) GSE – single-family 657,378 (52,285) 77,892 (13,744) 735,270 (66,029) GSE – multifamily 4,516,466 (124,136) 1,210,970 (54,584) 5,727,436 (178,720) 5,500,439 (215,187) 1,455,145 (86,605) 6,955,584 (301,792) Total $ 8,303,380 $ (222,692) $ 3,217,708 $ (130,979) $ 11,521,088 $ (353,671) December 31, 2021 Continuous Unrealized Loss Less than 12 Months Continuous Unrealized Loss 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized U.S. Treasury obligations $ 1,212,443 $ (370) $ — $ — $ 1,212,443 $ (370) HFA securities — — 50,053 (1,067) 50,053 (1,067) Supranational institutions — — 389,180 (5,668) 389,180 (5,668) U.S. government-owned corporations — — 306,864 (18,703) 306,864 (18,703) GSE — — 126,472 (3,671) 126,472 (3,671) 1,212,443 (370) 872,569 (29,109) 2,085,012 (29,479) MBS U.S. government guaranteed – multifamily 187,437 (52) — — 187,437 (52) GSE – single-family 93,020 (121) — — 93,020 (121) GSE – multifamily 1,507,051 (25,196) — — 1,507,051 (25,196) 1,787,508 (25,369) — — 1,787,508 (25,369) Total $ 2,999,951 $ (25,739) $ 872,569 $ (29,109) $ 3,872,520 $ (54,848)
Investments Classified by Contractual Maturity Date [Table Text Block]	Table 5.5 - Available-for-Sale Securities by Contractual Maturity (dollars in thousands) December 31, 2022 December 31, 2021 Year of Maturity Amortized Fair Amortized Fair Due in one year or less $ 250,015 $ 250,198 $ 27,000 $ 26,780 Due after one year through five years 5,011,292 4,998,056 1,898,894 1,898,308 Due after five years through 10 years 900,988 897,913 3,674,762 3,671,798 Due after 10 years 318,321 285,387 409,257 387,026 6,480,616 6,431,554 6,009,913 5,983,912 MBS (1) 7,496,581 7,195,362 6,828,061 6,912,075 Total $ 13,977,197 $ 13,626,916 $ 12,837,974 $ 12,895,987 _______________________ (1) MBS are not presented by contractual maturity because their expected maturities will likely differ from contractual maturities because borrowers of the underlying loans may have the right to call or prepay obligations with or without call or prepayment fees.
Debt Securities, Held-to-maturity [Table Text Block]	Table 5.6 - Held-to-Maturity Securities by Major Security Type (dollars in thousands) December 31, 2022 Amortized Cost (1) Gross Unrecognized Holding Gains Gross Unrecognized Holding Losses Fair Value MBS U.S. government guaranteed – single-family $ 3,614 $ 29 $ — $ 3,643 GSE – single-family 95,454 420 (926) 94,948 Total $ 99,068 $ 449 $ (926) $ 98,591 December 31, 2021 Amortized Cost (1) Gross Unrecognized Holding Gains Gross Unrecognized Holding Losses Fair Value MBS U.S. government guaranteed – single-family $ 4,320 $ 88 $ — $ 4,408 GSE – single-family 141,172 2,605 (117) 143,660 Total $ 145,492 $ 2,693 $ (117) $ 148,068 _______________________ (1) Amortized cost of held-to-maturity securities includes adjustments made to the cost basis of an investment for accretion, amortization, and collection of cash. Amortized cost excludes accrued interest receivable
Realized Gain (Loss) on Investments [Table Text Block]	Table 5.7 - Proceeds and Gains (Losses) from Sales of Investment Securities (dollars in thousands) For the Years Ended December 31, 2022 2021 2020 Available-for-Sale Securities Proceeds from sale $ 142,733 $ — $ 187,366 Amortized cost, net of allowance for credit losses 142,735 — 156,783 Gross realized gains from sale $ 124 $ — $ 30,948 Gross realized losses from sale (126) — (365) Realized net (loss) gain from sale $ (2) $ — $ 30,583 Held-to-Maturity Securities Proceeds from sale $ 10,405 $ 5,883 $ 262,850 Carrying value 10,385 5,600 176,293 Noncredit losses recorded in accumulated other comprehensive income — — 39,144 Realized net gain from sale $ 20 $ 283 $ 47,413
Debt Securities, Held-to-maturity, Allowance for Credit Loss	Table 5.8 - Allowance for Credit Losses on Debt Securities (dollars in thousands) For the Year Ended December 31, 2020 Available-for-Sale Held-to-Maturity Balance at beginning of year $ — $ — Adjustments for cumulative effect of change in accounting principle (1) — 5,308 Transfers 634 (634) Reduction of provision for credit losses due to sales of securities (126) (3,205) Reduction of provision for credit losses (143) (1,469) Charge-offs (365) — Balance at end of year $ — $ — _________________________ (1) We adopted new accounting guidance for the measurement of credit losses on financial instruments on January 1, 2020. Upon adoption we recorded through a cumulative effect adjustment to retained earnings an increase in the allowance for credit losses associated with held-to-maturity private-label MBS.	[1]
Debt Securities, Available-for-sale, Allowance for Credit Loss	Table 5.8 - Allowance for Credit Losses on Debt Securities (dollars in thousands) For the Year Ended December 31, 2020 Available-for-Sale Held-to-Maturity Balance at beginning of year $ — $ — Adjustments for cumulative effect of change in accounting principle (1) — 5,308 Transfers 634 (634) Reduction of provision for credit losses due to sales of securities (126) (3,205) Reduction of provision for credit losses (143) (1,469) Charge-offs (365) — Balance at end of year $ — $ — _________________________ (1) We adopted new accounting guidance for the measurement of credit losses on financial instruments on January 1, 2020. Upon adoption we recorded through a cumulative effect adjustment to retained earnings an increase in the allowance for credit losses associated with held-to-maturity private-label MBS.	[1]
[1]We adopted new accounting guidance for the measurement of credit losses on financial instruments on January 1, 2020. Upon adoption we recorded through a cumulative effect adjustment to retained earnings an increase in the allowance for credit losses associated with held-to-maturity private-label MBS.

Advances (Tables)

Advances (Tables)	12 Months Ended
	Dec. 31, 2022
Advances [Abstract]
Advances [Table Text Block]	Table 6.1 - Advances Outstanding by Year of Contractual Maturity (dollars in thousands) December 31, 2022 December 31, 2021 Amount Weighted Amount Weighted Overdrawn demand-deposit accounts $ 2,000 4.48 % $ 64 0.60 % Due in one year or less 24,563,604 4.26 5,064,776 0.76 Due after one year through two years 10,260,956 4.05 1,354,297 2.26 Due after two years through three years 2,034,070 2.10 1,541,076 1.64 Due after three years through four years 775,951 2.35 2,173,238 1.43 Due after four years through five years 1,775,923 3.76 1,310,971 1.07 Due after five years through fifteen years 2,377,747 2.53 871,692 2.11 Thereafter 40,525 1.41 31,591 1.33 Total par value 41,830,776 3.94 % 12,347,705 1.28 % Discounts (34,257) (34,926) Fair value of bifurcated derivatives (1) 400 11,890 Hedging adjustments (197,338) 15,351 Total (2) $ 41,599,581 $ 12,340,020 _________________________ (1) At December 31, 2022 and 2021, 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 $72.9 million and $16.3 million at December 31, 2022 and 2021, respectively. Table 6.2 - Advances Outstanding by Year of Contractual Maturity or Next Call Date (dollars in thousands) December 31, 2022 December 31, 2021 Overdrawn demand-deposit accounts $ 2,000 $ 64 Due in one year or less 33,919,899 6,116,251 Due after one year through two years 1,718,681 1,354,297 Due after two years through three years 1,986,570 1,249,001 Due after three years through four years 711,351 2,106,238 Due after four years through five years 1,078,603 632,271 Due after five years through fifteen years 2,373,147 857,992 Thereafter 40,525 31,591 Total par value $ 41,830,776 $ 12,347,705 Table 6.3 - Advances Outstanding by Year of Contractual Maturity or Next Put Date (dollars in thousands) December 31, 2022 December 31, 2021 Overdrawn demand-deposit accounts $ 2,000 $ 64 Due in one year or less 25,751,204 6,088,201 Due after one year through two years 10,525,456 908,797 Due after two years through three years 2,000,070 1,497,076 Due after three years through four years 750,951 1,709,313 Due after four years through five years 1,184,423 1,277,471 Due after five years through fifteen years 1,576,147 835,192 Thereafter 40,525 31,591 Total par value $ 41,830,776 $ 12,347,705 Table 6.4 - Advances by Current Interest Rate Terms (dollars in thousands) December 31, 2022 December 31, 2021 Fixed-rate Due in one year or less $ 24,190,034 $ 3,803,476 Due after one year 7,786,877 6,195,290 Total fixed-rate 31,976,911 9,998,766 Variable-rate Due in one year or less 375,570 1,261,364 Due after one year 9,478,295 1,087,575 Total variable-rate 9,853,865 2,348,939 Total par value $ 41,830,776 $ 12,347,705 Table 6.5 - Advances Prepayment Fees (dollars in thousands) For the Year Ended December 31, 2022 2021 2020 Prepayment fees received from borrowers $ 1,726 $ 54,537 $ 32,340 Hedging fair-value adjustments on prepaid advances 1,280 (6,356) (8,013) Net discounts (premiums) associated with prepaid advances 303 (14,162) (299) Advance prepayment fees recognized in income, net $ 3,309 $ 34,019 $ 24,028

Mortgage Loans Held for Portf_2

Mortgage Loans Held for Portfolio (Tables)	12 Months Ended
	Dec. 31, 2022
Receivables [Abstract]
Mortgage Loans Held for Portfolio [Table Text Block]	Table 7.1 - Mortgage Loans Held for Portfolio (dollars in thousands) December 31, 2022 December 31, 2021 Real estate Fixed-rate 15-year single-family mortgages $ 224,307 $ 278,393 Fixed-rate 20- and 30-year single-family mortgages 2,496,044 2,793,682 Premiums 40,305 48,043 Discounts (1,660) (671) Deferred derivative gains, net 1,333 2,412 Total mortgage loans held for portfolio (1) 2,760,329 3,121,859 Less: allowance for credit losses (1,900) (1,700) Total mortgage loans, net of allowance for credit losses $ 2,758,429 $ 3,120,159 ________________________ (1) Excludes accrued interest receivable Table 7.2 - Mortgage Loans Held for Portfolio by Collateral/Guarantee Type (dollars in thousands) December 31, 2022 December 31, 2021 Conventional mortgage loans $ 2,557,230 $ 2,880,354 Government mortgage loans 163,121 191,721 Total par value $ 2,720,351 $ 3,072,075
Financing Receivable Credit Quality Indicators [Table Text Block]	Table 7.3 - Credit Quality Indicator for Conventional Mortgage Loans (dollars in thousands) December 31, 2022 Year of Origination Payment Status at Amortized Cost (1) Prior to 2018 2018 to 2022 Total Past due 30-59 days delinquent $ 9,640 $ 9,274 $ 18,914 Past due 60-89 days delinquent 2,844 1,554 4,398 Past due 90 days or more delinquent 9,638 5,444 15,082 Total past due 22,122 16,272 38,394 Total current loans 1,161,468 1,394,290 2,555,758 Total conventional mortgage loans $ 1,183,590 $ 1,410,562 $ 2,594,152 December 31, 2021 Year of Origination Payment Status at Amortized Cost (1) Prior to 2017 2017 to 2021 Total Past due 30-59 days delinquent $ 7,719 $ 8,053 $ 15,772 Past due 60-89 days delinquent 3,312 2,660 5,972 Past due 90 days or more delinquent 11,932 9,196 21,128 Total past due 22,963 19,909 42,872 Total current loans 1,153,115 1,730,438 2,883,553 Total conventional mortgage loans $ 1,176,078 $ 1,750,347 $ 2,926,425 _________________________
Amortized Cost/Recorded Investment in Delinquent Mortgage Loans [Table Text Block]	Table 7.4 - Other Delinquency Statistics of Mortgage Loans (dollars in thousands) December 31, 2022 Amortized Cost in Conventional Mortgage Loans Amortized Cost in Government Mortgage Loans Total In process of foreclosure (1) $ 2,898 $ 891 $ 3,789 Serious delinquency rate (2) 0.58 % 1.42 % 0.63 % Past due 90 days or more still accruing interest $ — $ 2,359 $ 2,359 Loans on nonaccrual status (3) $ 15,246 $ — $ 15,246 December 31, 2021 Amortized Cost in Conventional Mortgage Loans Amortized Cost in Government Mortgage Loans Total In process of foreclosure (1) $ 786 $ 935 $ 1,721 Serious delinquency rate (2) 0.74 % 2.24 % 0.83 % Past due 90 days or more still accruing interest $ — $ 4,383 $ 4,383 Loans on nonaccrual status (3) $ 21,529 $ — $ 21,529 _______________________ (1) Includes loans where the decision of foreclosure or similar alternative such as pursuit of deed-in-lieu of foreclosure has been reported. (2) Loans that are 90 days or more past due or in the process of foreclosure expressed as a percentage of the recorded investment in the total loan portfolio class. (3) As of December 31, 2022 and 2021, $8.7 million and $11.8 million, respectively, of conventional mortgage loans on nonaccrual status did not have an associated allowance for credit losses because either these loans were charged off or the fair value of the underlying collateral, including any credit enhancements, is greater than the amortized cost of the loans.
Rollforward of Allowance for Credit Losses on Mortgage Loans [Table Text Block]	Table 7.5 presents a roll forward of the allowance for credit losses on conventional mortgage loans for the years ended December 31, 2022, 2021, and 2020. Table 7.5 - Allowance for Credit Losses on Conventional Mortgage Loans (dollars in thousands) 2022 2021 2020 Allowance for credit losses (1) Balance, beginning of year $ 1,700 $ 3,100 $ 500 Adjustment for cumulative effect of change in accounting principle — — 2,221 Recoveries (charge-offs) 29 62 (207) Provision for (reduction of) credit losses 171 (1,462) 586 Balance, end of year $ 1,900 $ 1,700 $ 3,100 _________________________ (1) These amounts exclude government mortgage loans because we make no allowance for credit losses based on our investments in government mortgage loans, as discussed below under — Government Mortgage Loans Held for Portfolio.

Derivatives and Hedging Activ_2

Derivatives and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Value of Derivative Instruments [Table Text Block]	Table 8.1 - Fair Value of Derivative Instruments (dollars in thousands) December 31, 2022 December 31, 2021 Notional Derivative Derivative Notional Derivative Derivative Derivatives designated as hedging instruments Interest-rate swaps $ 38,356,160 $ 47,000 $ (1,394,051) $ 26,589,956 $ 362 $ (163,457) Forward-start interest-rate swaps 1,391,000 756 (40) 1,391,000 48 (428) Total derivatives designated as hedging instruments 39,747,160 47,756 (1,394,091) 27,980,956 410 (163,885) Derivatives not designated as hedging instruments Interest-rate swaps 107,000 1 (226) 900,425 3,440 (13,663) CO bond firm commitments 35,000 50 — 55,000 54 (30) Mortgage-delivery commitments (1) 3,454 47 (2) 3,164 68 — Total derivatives not designated as hedging instruments 145,454 98 (228) 958,589 3,562 (13,693) Total notional amount of derivatives $ 39,892,614 $ 28,939,545 Total derivatives before netting and collateral adjustments 47,854 (1,394,319) 3,972 (177,578) Netting adjustments and cash collateral, including related accrued interest (2) 382,890 1,368,679 374,560 138,634 Derivative assets and derivative liabilities $ 430,744 $ (25,640) $ 378,532 $ (38,944) _______________________ (1) Mortgage-delivery commitments are classified as derivatives with changes in fair value recorded in other income. (2) Amounts represent the effect of master-netting agreements intended to allow us to settle positive and negative positions with the same counterparty. Cash collateral posted, including accrued interest, was $1.8 billion and $513.2 million at
Net Gains (Losses) on Derivatives and Hedging Activities [Table Text Block]	Tables 8.2 presents the net gains (losses) on qualifying fair-value hedging relationships. Gains (losses) on derivatives include unrealized changes in fair value as well as net interest settlements. Table 8.2 - Net Gains (Losses) on Fair Value Hedging Relationships (dollars in thousands) For the Year Ended December 31, 2022 Advances Available-for-sale Securities CO Bonds Total interest income (expense) in the statements of operations $ 631,838 $ 354,512 $ (591,546) Gains (losses) on hedging relationships Changes in fair value: Derivatives $ 209,234 $ 1,438,662 $ (1,206,071) Hedged items (206,017) (1,397,528) 1,207,056 Net changes in fair value before price alignment interest 3,217 41,134 985 Price alignment interest (1) (2,285) (12,540) 391 Net interest settlements on derivatives (2)(3) 7,704 33,981 (114,582) Net gains (losses) on qualifying hedging relationships 8,636 62,575 (113,206) Amortization/accretion of discontinued hedging relationships (990) — 2,045 Net gains (losses) on derivatives and hedging activities recorded in net interest income $ 7,646 $ 62,575 $ (111,161) For the Year Ended December 31, 2021 Advances Available-for-sale Securities CO Bonds Total interest income (expense) in the statements of operations $ 170,003 $ 73,314 $ (210,052) Gains (losses) on hedging relationships Changes in fair value: Derivatives $ 85,265 $ 280,707 $ (197,016) Hedged items (84,296) (273,132) 197,116 Net changes in fair value before price alignment interest 969 7,575 100 Price alignment interest (1) 20 66 (4) Net interest settlements on derivatives (2)(3) (60,285) (120,524) 67,028 Net (losses) gains on qualifying hedging relationships (59,296) (112,883) 67,124 Amortization/accretion of discontinued hedging relationships (2,064) — 2,804 Net (losses) gains on derivatives and hedging activities recorded in net interest income $ (61,360) $ (112,883) $ 69,928 For the Year Ended December 31, 2020 Advances Available-for-sale Securities CO Bonds Total interest income (expense) in the statements of operations $ 400,286 $ 63,243 $ (374,449) Gains (losses) on hedging relationships Changes in fair value: Derivatives $ (82,885) $ (270,047) $ 25,811 Hedged items 81,859 263,226 (27,353) Net changes in fair value before price alignment interest (1,026) (6,821) (1,542) Price alignment interest (1) 484 1,373 (204) Net interest settlements on derivatives (2)(3) (53,615) (70,317) 23,843 Net (losses) gains on qualifying hedging relationships (54,157) (75,765) 22,097 Amortization/accretion of discontinued hedging relationships (1,937) — 3,322 Net (losses) gains on derivatives and hedging activities recorded in net interest income $ (56,094) $ (75,765) $ 25,419 _______________________ (1) Relates to derivatives for which variation margin payments are characterized as daily settled contracts. (2) Represents interest income/expense on derivatives in qualifying fair-value hedging relationships. Net interest settlements on derivatives that are not in qualifying fair-value hedging relationships are reported in other income. (3) Excludes the interest income/expense of the respective hedged items recorded in net interest income. Tables 8.3 presents the net gains (losses) on qualifying cash flow hedging relationships. Table 8.3 - Net Gains (Losses) on Cash Flow Hedging Relationships (dollars in thousands) For the Year Ended December 31, 2022 2021 2020 Forward-start interest rate swaps - CO Bonds Losses reclassified from accumulated other comprehensive loss into interest expense $ (5,539) $ (5,949) $ (7,029) Gains (losses) recognized in other comprehensive income 63,235 (7,875) (1,187)
Gains (Losses) By Type of Hedged Item [Table Text Block]	Table 8.4 - Cumulative Basis Adjustments for Fair-Value Hedges (dollars in thousands) December 31, 2022 Line Item in Statement of Condition Amortized Cost of Hedged Asset/ Liability (1) Basis Adjustments for Active Hedging Relationships Included in Amortized Cost Basis Adjustments for Discontinued Hedging Relationships Included in Amortized Cost Cumulative Amount of Fair Value Hedging Basis Adjustments Advances $ 3,855,472 $ (199,540) $ 2,202 $ (197,338) Available-for-sale securities 11,288,325 (1,190,434) — (1,190,434) Consolidated obligation bonds 20,338,009 (1,382,685) 29,504 (1,353,181) _______________________ (1) Includes only the amortized cost of hedged items in fair-value hedging relationships.
Derivatives Not Designated as Hedging Instruments [Table Text Block]	Table 8.5 - Net Gains and Losses on Derivatives and Hedging Activities (dollars in thousands) For the Year Ended December 31, 2022 2021 2020 Derivatives not designated as hedging instruments: Economic hedges: Interest-rate swaps $ (530) $ (2,183) $ (51,187) CO Bond firm commitments 520 1,734 — Mortgage-delivery commitments (668) (118) 1,405 Total net losses related to derivatives not designated as hedging instruments (678) (567) (49,782) Other (1) — 8 108 Net losses on derivatives and hedging activities $ (678) $ (559) $ (49,674) ______________________ (1) Consists of price alignment amount on derivatives for which variation margin is characterized as a daily settlement amount.
Impact of Variation Margin for Cleared Derivatives on the Statement of Cash Flows [Table Text Block]	Table 8.6 - Impact of Variation Margin for Cleared Derivatives on the Statement of Cash Flows (dollars in thousands) Increase (decrease) on Cash Flow Statement For the Year Ended December 31, 2022 2021 2020 Operating activity - net change in derivatives and hedging activities $ 1,633,293 $ 257,727 $ (321,862) Financing activity - net payments on derivatives with a financing element 161,289 69,021 (53,832) Total variation margin received (posted) on cleared derivatives $ 1,794,582 $ 326,748 $ (375,694)
Post-haircut Value of Incremental Collateral Based on Incremental Credit Rating Downgrades [Table Text Block]	Table 8.7 sets forth the post-haircut value of incremental collateral that certain uncleared derivatives counterparties could have required us to deliver based on incremental credit rating downgrades at December 31, 2022. Table 8.7 - Post Haircut Value of Incremental Collateral to be Delivered as of December 31, 2022 (dollars in thousands) Ratings Downgrade (1) From To Incremental Collateral AA+ AA or AA- $ — AA- A+, A or A- — A- below A- 70,047 _______________________ (1) Ratings are expressed in this table according to S&P's conventions but include the equivalent of such rating by Moody's. If there is a split rating, the lower rating is used.
Offsetting Assets [Table Text Block]	Table 8.8 presents separately the fair value of derivatives that are subject to netting due to a legal right of offset based on the terms of our master netting arrangements or similar agreements as of December 31, 2022 and 2021, and the fair value of derivatives that are not subject to such netting. Derivatives subject to netting include any related cash collateral received from or pledged to counterparties. Table 8.8 - Netting of Derivative Assets and Derivative Liabilities (dollars in thousands) December 31, 2022 Derivative Instruments Meeting Netting Requirements Gross Recognized Amount Gross Amounts of Netting Adjustments (1) Derivative Instruments Not Meeting Netting Requirements Total Derivative Assets and Total Derivative Liabilities Non-cash Collateral (Received) or Pledged Not Offset (2) Net Amount Derivative Assets Interest-rate swaps Uncleared $ 23,782 $ (23,782) $ — $ — $ — Cleared 23,975 406,672 430,647 — 430,647 CO bond firm commitments $ 50 50 50 Mortgage delivery commitments 47 47 47 Total $ 430,744 $ 430,744 Derivative Liabilities Interest-rate swaps Uncleared $ (1,393,632) $ 1,367,994 $ (25,638) $ — $ (25,638) Cleared (684) 684 — — — Mortgage delivery commitments $ (2) (2) (2) Total $ (25,640) $ (25,640) December 31, 2021 Derivative Instruments Meeting Netting Requirements Gross Recognized Amount Gross Amounts of Netting Adjustments (1) Derivative Instruments Not Meeting Netting Requirements Total Derivative Assets and Total Derivative Liabilities Non-cash Collateral (Received) or Pledged Not Offset (2) Net Amount Derivative Assets Interest-rate swaps Uncleared $ 327 $ (103) $ 224 $ — $ 224 Cleared 3,523 374,663 378,186 — 378,186 CO bond firm commitments $ 54 54 54 Mortgage delivery commitment 68 68 68 Total $ 378,532 $ 378,532 Derivative Liabilities Interest-rate swaps Uncleared $ (171,374) $ 132,460 $ (38,914) $ 28,374 $ (10,540) Cleared (6,175) 6,175 — — — CO bond firm commitments $ (30) (30) (30) Total $ (38,944) $ (10,570) _______________________ (1) Includes gross amounts of netting adjustments and cash collateral. (2) Includes non-cash collateral at fair value that cannot be sold or repledged by the counterparty. Additionally, any overcollateralization with a counterparty is not included in the determination of the net amount. There was no overcollateralization at either December 31, 2022 or 2021.
Offsetting Liabilities [Table Text Block]	Table 8.8 presents separately the fair value of derivatives that are subject to netting due to a legal right of offset based on the terms of our master netting arrangements or similar agreements as of December 31, 2022 and 2021, and the fair value of derivatives that are not subject to such netting. Derivatives subject to netting include any related cash collateral received from or pledged to counterparties. Table 8.8 - Netting of Derivative Assets and Derivative Liabilities (dollars in thousands) December 31, 2022 Derivative Instruments Meeting Netting Requirements Gross Recognized Amount Gross Amounts of Netting Adjustments (1) Derivative Instruments Not Meeting Netting Requirements Total Derivative Assets and Total Derivative Liabilities Non-cash Collateral (Received) or Pledged Not Offset (2) Net Amount Derivative Assets Interest-rate swaps Uncleared $ 23,782 $ (23,782) $ — $ — $ — Cleared 23,975 406,672 430,647 — 430,647 CO bond firm commitments $ 50 50 50 Mortgage delivery commitments 47 47 47 Total $ 430,744 $ 430,744 Derivative Liabilities Interest-rate swaps Uncleared $ (1,393,632) $ 1,367,994 $ (25,638) $ — $ (25,638) Cleared (684) 684 — — — Mortgage delivery commitments $ (2) (2) (2) Total $ (25,640) $ (25,640) December 31, 2021 Derivative Instruments Meeting Netting Requirements Gross Recognized Amount Gross Amounts of Netting Adjustments (1) Derivative Instruments Not Meeting Netting Requirements Total Derivative Assets and Total Derivative Liabilities Non-cash Collateral (Received) or Pledged Not Offset (2) Net Amount Derivative Assets Interest-rate swaps Uncleared $ 327 $ (103) $ 224 $ — $ 224 Cleared 3,523 374,663 378,186 — 378,186 CO bond firm commitments $ 54 54 54 Mortgage delivery commitment 68 68 68 Total $ 378,532 $ 378,532 Derivative Liabilities Interest-rate swaps Uncleared $ (171,374) $ 132,460 $ (38,914) $ 28,374 $ (10,540) Cleared (6,175) 6,175 — — — CO bond firm commitments $ (30) (30) (30) Total $ (38,944) $ (10,570) _______________________ (1) Includes gross amounts of netting adjustments and cash collateral. (2) Includes non-cash collateral at fair value that cannot be sold or repledged by the counterparty. Additionally, any overcollateralization with a counterparty is not included in the determination of the net amount. There was no overcollateralization at either December 31, 2022 or 2021.

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2022
Deposits [Abstract]
Interest-bearing and Non-interest-bearing Deposits [Table Text Block]	Table 9.1 - Deposits (dollars in thousands) December 31, 2022 December 31, 2021 Interest-bearing Demand and overnight $ 632,635 $ 831,009 Other 1,867 1,998 Noninterest-bearing Other 20,985 51,025 Total deposits $ 655,487 $ 884,032

Consolidated Obligations (Table

Consolidated Obligations (Tables)	12 Months Ended
	Dec. 31, 2022
Debt Disclosure [Abstract]
CO Bonds by Year of Contractual Maturity [Table Text Block]	Table 10.1 - CO Bonds Outstanding by Contractual Maturity (dollars in thousands) December 31, 2022 December 31, 2021 Amount Weighted Average Rate (1) Amount Weighted Average Rate (1) Due in one year or less $ 10,616,385 3.15 % $ 6,919,220 0.79 % Due after one year through two years 5,321,650 1.85 3,069,155 1.18 Due after two years through three years 4,993,600 1.70 3,514,735 1.09 Due after three years through four years 5,951,355 1.10 3,029,600 0.88 Due after four years through five years 2,099,000 2.24 5,735,605 0.91 Thereafter 3,916,865 2.09 4,456,865 1.91 Total par value 32,898,855 2.17 % 26,725,180 1.10 % Premiums 27,902 40,251 Discounts (8,033) (9,011) Hedging adjustments (1,353,181) (143,388) Total $ 31,565,543 $ 26,613,032 _______________________ (1) The CO bonds' weighted-average rate excludes concession fees. Table 10.3 - CO Bonds Outstanding by Contractual Maturity or Next Call Date (dollars in thousands) December 31, 2022 December 31, 2021 Due in one year or less $ 26,319,885 $ 19,150,220 Due after one year through two years 1,843,150 3,461,155 Due after two years through three years 1,952,600 1,044,735 Due after three years through four years 1,370,355 1,544,600 Due after four years through five years 438,000 539,605 Thereafter 974,865 984,865 Total par value $ 32,898,855 $ 26,725,180
CO Bonds Long-term Debt Instruments [Table Text Block]	Table 10.2 - CO Bonds Outstanding by Call Feature (dollars in thousands) December 31, 2022 December 31, 2021 Noncallable and nonputable $ 15,039,805 $ 13,924,180 Callable 17,859,050 12,801,000 Total par value $ 32,898,855 $ 26,725,180 Table 10.4 - CO Bonds by Interest Rate-Payment Type (dollars in thousands) December 31, 2022 December 31, 2021 Fixed-rate $ 22,667,605 $ 17,707,180 Step-up (1) 6,031,250 4,215,000 Simple variable-rate 4,200,000 4,803,000 Total par value $ 32,898,855 $ 26,725,180 _______________________ (1) Step-up bonds pay interest at increasing fixed rates for specified intervals over the life of the CO bond and can be called at our option on the step-up dates.
CO Discount Notes [Table Text Block]	Outstanding CO discount notes for which we were primarily liable, all of which are due within one year, were as follows: Table 10.5 - CO Discount Notes Outstanding (dollars in thousands) Book Value Par Value Weighted Average Rate (1) December 31, 2022 $ 26,975,260 $ 27,109,244 4.22 % December 31, 2021 $ 2,275,320 $ 2,275,519 0.05 % _______________________ (1) CO discount notes' weighted-average rate represents a yield to maturity excluding concession fees.

Affordable Housing Program (Tab

Affordable Housing Program (Tables)	12 Months Ended
	Dec. 31, 2022
Affordable Housing Program AHP [Abstract]
Roll-forward of the AHP Liability[Table Text Block]	Table 11.1 - AHP Liability (dollars in thousands) 2022 2021 Balance at beginning of year $ 70,503 $ 78,640 AHP expense for the period 20,521 7,739 AHP voluntary contribution 5,479 4,761 AHP direct grant disbursements (17,683) (17,980) AHP subsidy for AHP advance disbursements (3,155) (5,806) Return of previously disbursed grants and subsidies 957 3,149 Balance at end of year $ 76,622 $ 70,503

Capital (Tables)

Capital (Tables)	12 Months Ended
	Dec. 31, 2022
Banking Regulation, Total Capital [Abstract]
Compliance with Regulatory Capital Requirements [Table Text Block]	Table 12.1 - Regulatory Capital Requirements (dollars in thousands) Risk-Based Capital Requirements December 31, December 31, Permanent capital Class B capital stock $ 2,031,178 $ 953,638 Mandatorily redeemable capital stock 10,290 13,562 Retained earnings 1,690,568 1,548,406 Total permanent capital $ 3,732,036 $ 2,515,606 Risk-based capital requirement Credit-risk capital $ 130,875 $ 84,301 Market-risk capital 225,813 213,467 Operations-risk capital 107,006 89,330 Total risk-based capital requirement $ 463,694 $ 387,098 Permanent capital in excess of risk-based capital requirement $ 3,268,342 $ 2,128,508 December 31, 2022 December 31, 2021 Required Actual Required Actual Capital Ratio Risk-based capital $ 463,694 $ 3,732,036 $ 387,098 $ 2,515,606 Total regulatory capital $ 2,515,902 $ 3,732,036 $ 1,301,812 $ 2,515,606 Total capital-to-asset ratio 4.0 % 5.9 % 4.0 % 7.7 % Leverage Ratio Leverage capital $ 3,144,877 $ 5,598,054 $ 1,627,265 $ 3,773,409 Leverage capital-to-assets ratio 5.0 % 8.9 % 5.0 % 11.6 %
Mandatorily redeemable capital stock [Table Text Block]	Table 12.2 - Mandatorily Redeemable Capital Stock (dollars in thousands) 2022 2021 2020 Balance at beginning of year $ 13,562 $ 6,282 $ 5,806 Capital stock subject to mandatory redemption reclassified from capital 8,961 10,265 581 Redemption/repurchase of mandatorily redeemable capital stock (12,233) (2,985) (105) Balance at end of year $ 10,290 $ 13,562 $ 6,282 Table 12.3 - Mandatorily Redeemable Capital Stock by Expiry of Redemption Notice Period (dollars in thousands) December 31, 2022 December 31, 2021 Past redemption date (1) $ 2,980 $ 3,138 Due in one year or less 59 92 Due after one year through two years — 30 Due after two years through three years 435 — Due after three years through four years 689 581 Due after four years through five years 6,127 9,721 Total $ 10,290 $ 13,562 _______________________ (1) Amount represents mandatorily redeemable capital stock that has reached the end of the five-year redemption-notice period but the member-related activity (for example, advances) remains outstanding. Accordingly, these shares of stock will not be redeemed until the activity is no longer outstanding.

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	12 Months Ended
	Dec. 31, 2022
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Schedule of Accumulated Other Comprehensive Loss [Table Text Block]	Accumulated Other Comprehensive Income (Loss) Table 13.1 - Accumulated Other Comprehensive Income (Loss) (dollars in thousands) Net Unrealized Gain (Loss) on Available-for-sale Securities Noncredit Portion of Other-than-temporary Impairment Losses on Held-to-maturity Securities Net Unrealized Loss Relating to Hedging Activities Pension and Postretirement Benefits Total Balance, December 31, 2019 $ (73,922) $ (76,036) $ (30,207) $ (6,807) $ (186,972) Other comprehensive income (loss) before reclassifications: Adjustment for transfer of securities from held-to-maturity to available-for-sale 16,062 31,502 — — 47,564 Net unrealized gains (losses) 137,011 — (1,187) — 135,824 Noncredit losses included in basis of securities sold — 39,144 — — 39,144 Accretion of noncredit loss — 5,390 — — 5,390 Net actuarial loss — — — (2,386) (2,386) Reclassifications from other comprehensive income to net income Reclassification of realized net gains included in net income (30,583) — — — (30,583) Amortization - hedging activities (1) — — 7,029 — 7,029 Amortization - pension and postretirement benefits (2) — — — 1,129 1,129 Other comprehensive income (loss) 122,490 76,036 5,842 (1,257) 203,111 Balance, December 31, 2020 48,568 — (24,365) (8,064) 16,139 Other comprehensive income (loss) before reclassifications: Net unrealized gains (losses) 9,445 — (7,875) — 1,570 Net actuarial gain — — — 4,059 4,059 Reclassifications from other comprehensive income to net income Amortization - hedging activities (1) — — 5,949 — 5,949 Amortization - pension and postretirement benefits (2) — — — 1,250 1,250 Other comprehensive income (loss) 9,445 — (1,926) 5,309 12,828 Balance, December 31, 2021 58,013 — (26,291) (2,755) 28,967 Other comprehensive income (loss) before reclassifications: Net unrealized (losses) gains (408,296) — 63,234 — (345,062) Net actuarial gain — — — 4,310 4,310 Reclassifications from other comprehensive income to net income Reclassification of realized net loss included in net income 2 — — — 2 Amortization - hedging activities (1) — — 5,539 — 5,539 Amortization - pension and postretirement benefits (2) — — — (181) (181) Other comprehensive (loss) income (408,294) — 68,773 4,129 (335,392) Balance, December 31, 2022 $ (350,281) $ — $ 42,482 $ 1,374 $ (306,425) _______________________ (1) Recorded in CO bond interest expense. (2) Recorded in other expenses in the statement of operations.

Employee Retirement Plans (Tabl

Employee Retirement Plans (Tables)	12 Months Ended
	Dec. 31, 2022
Retirement Benefits [Abstract]
Schedule of Net Funded Status [Table Text Block]	Table 14.1 - Pentegra Defined Benefit Plan Net Pension Cost and Funded Status (dollars in thousands) For the Years Ended December 31, 2022 2021 2020 Net pension cost $ 704 $ 883 $ 6,843 Pentegra Defined Benefit Plan funded status as of July 1 (1) 118.9 % (2) 130.6 % (3) 108.5 % Our funded status as of July 1 (1) 119.2 % 136.4 % 110.2 % ______________________ (1) The funded status is calculated in accordance with a provision contained in the Highway and Transportation Funding Act of 2014 (HATFA), which was signed into law on August 8, 2014, and which modifies the interest rates that had been set by the Moving Ahead for Progress in the 21st Century Act (MAP-21). MAP-21, signed into law in 2012, changed the calculation of the discount rate used in measuring the pension plan liability. MAP-21 allows plan sponsors to measure the pension plan liability using a 25-year average of interest rates plus or minus a corridor. Prior to MAP-21, the discount rate used in measuring the pension plan liability was based on the 24-month average of interest rates. HATFA amended MAP-21 by extending the time period and reducing the rate at which the 25-year corridors widen. Over time, the pension funding stabilization effect of MAP-21 will decline because the 24-month smoothed segment rates and the amended 25-year corridors are likely to converge. (2) The funded status as of July 1, 2022, is preliminary and may increase because the plan's participants were permitted to make contributions for the plan year ended June 30, 2022, through March 15, 2023. Contributions made on or before March 15, 2023, and designated for the plan year ended June 30, 2022, will be included in the final valuation as of July 1, 2022. The final funded status as of July 1, 2022, will not be available until the Form 5500 for the plan year July 1, 2022, through June 30, 2023 is filed. This Form 5500 is due to be filed no later than April 2024.
Change in Benefit Obligation [Table Text Block]	Table 14.2 - Pension and Postretirement Benefit Obligation, Fair Value of Plan Assets, and Funded Status (dollars in thousands) Nonqualified Supplemental Defined Benefit Retirement Plan Postretirement Benefits December 31, 2022 December 31, 2021 December 31, 2022 December 31, 2021 Change in benefit obligation (1) Benefit obligation at beginning of year $ 19,828 $ 28,028 $ 1,658 $ 1,690 Service cost 856 1,347 34 45 Interest cost 497 407 48 43 Actuarial gain (3,726) (3,960) (584) (99) Benefits paid (129) (137) (25) (21) Settlements (3,346) (5,857) — — Benefit obligation at end of year 13,980 19,828 1,131 1,658 Change in plan assets Fair value of plan assets at beginning of year — — — — Employer contribution 3,475 5,994 25 21 Benefits paid (129) (137) (25) (21) Settlements (3,346) (5,857) — — Fair value of plan assets at end of year — — — — Funded status at end of year $ (13,980) $ (19,828) $ (1,131) $ (1,658) ______________________ (1) Represents the projected benefit obligation for the nonqualified supplemental defined benefit retirement plan and the accumulated postretirement benefit obligation for postretirement benefits.
Schedule of Net Periodic Benefit Cost Not yet Recognized [Table Text Block]	Table 14.3 - Pension and Postretirement Benefits Recognized in Accumulated Other Comprehensive Income (dollars in thousands) Nonqualified Supplemental Defined Benefit Retirement Plan Postretirement December 31, 2022 December 31, 2021 December 31, 2022 December 31, 2021 Net actuarial (gain) loss $ (1,288) $ 2,218 $ (85) $ 537
Net Periodic Benefit Cost [Table Text Block]	Table 14.4 - Net Periodic Benefit Cost and Other Amounts Recognized in Other Comprehensive Income (dollars in thousands) Nonqualified Supplemental Defined Benefit Retirement Plan Postretirement Benefits 2022 2021 2020 2022 2021 2020 Net Periodic Benefit Cost Service cost $ 856 $ 1,347 $ 1,487 $ 34 $ 45 $ 44 Interest cost 497 407 551 48 43 44 Amortization of prior service cost — — 79 — — — Amortization of net actuarial loss 290 543 1,020 39 52 30 Curtailment charge — — 69 — — — Settlement (gain) loss (510) 655 875 — — — Net periodic benefit cost 1,133 2,952 4,081 121 140 118 Other Changes in Benefit Obligations Recognized in Accumulated Other Comprehensive Income (Loss) Amortization of prior service cost — — (79) — — — Amortization of net actuarial loss (290) (543) (1,020) (39) (52) (30) Net actuarial (gain) loss (3,726) (3,960) 3,048 (584) (99) 282 Curtailment charge — — (69) — — — Settlement gain (loss) recognized in earnings 510 (655) (875) — — — Total amount recognized in other comprehensive income (3,506) (5,158) 1,005 (623) (151) 252 Total amount recognized in net periodic benefit cost and other comprehensive income $ (2,373) $ (2,206) $ 5,086 $ (502) $ (11) $ 370
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]	Nonqualified Supplemental Defined Benefit Retirement Plan Postretirement Benefits 2022 2021 2020 2022 2021 2020 Net Periodic Benefit Cost Service cost $ 856 $ 1,347 $ 1,487 $ 34 $ 45 $ 44 Interest cost 497 407 551 48 43 44 Amortization of prior service cost — — 79 — — — Amortization of net actuarial loss 290 543 1,020 39 52 30 Curtailment charge — — 69 — — — Settlement (gain) loss (510) 655 875 — — — Net periodic benefit cost 1,133 2,952 4,081 121 140 118 Other Changes in Benefit Obligations Recognized in Accumulated Other Comprehensive Income (Loss) Amortization of prior service cost — — (79) — — — Amortization of net actuarial loss (290) (543) (1,020) (39) (52) (30) Net actuarial (gain) loss (3,726) (3,960) 3,048 (584) (99) 282 Curtailment charge — — (69) — — — Settlement gain (loss) recognized in earnings 510 (655) (875) — — — Total amount recognized in other comprehensive income (3,506) (5,158) 1,005 (623) (151) 252 Total amount recognized in net periodic benefit cost and other comprehensive income $ (2,373) $ (2,206) $ 5,086 $ (502) $ (11) $ 370
Defined Benefit Plan, Assumptions [Table Text Block]	Table 14.5 - Pension and Postretirement Benefit Plan Key Assumptions Nonqualified Supplemental Defined Benefit Retirement Plan Postretirement 2022 2021 2022 2021 Benefit obligation Discount rate 4.90 % 2.32 % 5.03 % 2.85 % Salary increases 5.50 % 5.50 % — — Net periodic benefit cost Discount rate 2.32 % 1.73 % 2.85 % 2.55 % Salary increases 5.50 % 5.50 % — —
Schedule of Expected Benefit Payments [Table Text Block]	Table 14.6 - Estimated Future Benefit Payments (dollars in thousands) Estimated Future Payments Nonqualified Supplemental Defined Benefit Postretirement 2023 $ 1,591 $ 27 2024 2,295 29 2025 4,532 31 2026 2,225 33 2027 210 36 2028-2032 1,495 222

Fair Values (Tables)

Fair Values (Tables)	12 Months Ended
	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments [Table Text Block]	Table 15.1 presents the carrying value, fair value, and fair value hierarchy of our financial assets and liabilities at December 31, 2022 and 2021. We record trading securities, available-for-sale securities, derivative assets, derivative liabilities, and certain other assets at fair value on a recurring basis and certain mortgage loans, and certain other assets at fair value on a non-recurring basis. We record all other financial assets and liabilities at amortized cost. Refer to Table 15.2 for further details about the financial assets and liabilities held at fair value on either a recurring or non-recurring basis. Table 15.1 - Fair Value Summary (dollars in thousands) December 31, 2022 Carrying Total Fair Value Level 1 Level 2 Level 3 Netting Adjustments and Cash Collateral (2) Financial instruments Assets: Cash and due from banks $ 7,593 $ 7,593 $ 7,593 $ — $ — $ — Interest-bearing deposits 1,485,290 1,485,290 1,485,290 — — — Federal funds sold 2,706,000 2,705,992 — 2,705,992 — — Trading securities (1) 1,507 1,507 — 1,507 — — Available-for-sale securities (1) 13,626,916 13,626,916 — 13,594,142 32,774 — Held-to-maturity securities 99,068 98,591 — 98,591 — — Advances 41,599,581 41,378,357 — 41,378,357 — — Mortgage loans, net 2,758,429 2,483,271 — 2,462,257 21,014 — Accrued interest receivable 134,268 134,268 — 134,268 — — Derivative assets (1) 430,744 430,744 — 47,854 — 382,890 Other assets (1) 25,504 25,504 11,950 13,554 — — Liabilities: Deposits (655,487) (655,425) — (655,425) — — COs: Bonds (31,565,543) (30,981,391) — (30,981,391) — — Discount notes (26,975,260) (26,972,926) — (26,972,926) — — Mandatorily redeemable capital stock (10,290) (10,290) (10,290) — — — Accrued interest payable (130,515) (130,515) — (130,515) — — Derivative liabilities (1) (25,640) (25,640) — (1,394,319) — 1,368,679 Other: Commitments to extend credit for advances — (13,327) — (13,327) — — Standby letters of credit (1,168) (1,168) — (1,168) — — December 31, 2021 Carrying Total Fair Level 1 Level 2 Level 3 Netting Adjustments and Cash Collateral (2) Financial instruments Assets: Cash and due from banks $ 204,993 $ 204,993 $ 204,993 $ — $ — $ — Interest-bearing deposits 85,153 85,153 85,153 — — — Securities purchased under agreements to resell 800,000 799,998 — 799,998 — — Federal funds sold 1,944,000 1,943,998 — 1,943,998 — — Trading securities (1) 501,867 501,867 — 501,867 — — Available-for-sale securities (1) 12,895,987 12,895,987 — 12,833,722 62,265 — Held-to-maturity securities 145,492 148,068 — 148,068 — — Advances 12,340,020 12,440,985 — 12,440,985 — — Mortgage loans, net 3,120,159 3,234,829 — 3,204,222 30,607 — Accrued interest receivable 68,360 68,360 — 68,360 — — Derivative assets (1) 378,532 378,532 — 3,972 — 374,560 Other assets (1) 32,570 32,570 13,937 18,633 — — Liabilities: Deposits (884,032) (884,029) — (884,029) — — COs: Bonds (26,613,032) (26,882,036) — (26,882,036) — — Discount notes (2,275,320) (2,275,276) — (2,275,276) — — Mandatorily redeemable capital stock (13,562) (13,562) (13,562) — — — Accrued interest payable (60,968) (60,968) — (60,968) — — Derivative liabilities (1) (38,944) (38,944) — (177,578) — 138,634 Other: Commitments to extend credit for advances — (6,196) — (6,196) — — Standby letters of credit (1,146) (1,146) — (1,146) — — _______________________ (1) Carried at fair value and measured on a recurring basis. (2) These amounts represent the effect of master-netting agreements intended to allow us to settle positive and negative positions and also cash collateral and related accrued interest held or placed with the same clearing member and/or counterparty.
Fair Value Measured on Recurring and Nonrecurring Basis [Table Text Block]	Table 15.2 - Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis (dollars in thousands) December 31, 2022 Level 1 Level 2 Level 3 Netting Adjustments and Cash Collateral (1) Total Assets: Carried at fair value on a recurring basis Trading securities: Corporate bonds $ — $ 1,507 $ — $ — $ 1,507 Total trading securities — 1,507 — — 1,507 Available-for-sale securities: U.S. Treasury obligations — 5,723,562 — — 5,723,562 HFA securities — — 32,774 — 32,774 Supranational institutions — 350,352 — — 350,352 U.S. government-owned corporations — 227,200 — — 227,200 GSE — 97,666 — — 97,666 U.S. government guaranteed – single-family MBS — 16,148 — — 16,148 U.S. government guaranteed – multifamily MBS — 476,730 — — 476,730 GSE – single-family MBS — 765,526 — — 765,526 GSE – multifamily MBS — 5,936,958 — — 5,936,958 Total available-for-sale securities — 13,594,142 32,774 — 13,626,916 Derivative assets: Interest-rate-exchange agreements — 47,757 — 382,890 430,647 CO Bond firm commitments — 50 — — 50 Mortgage delivery commitments — 47 — — 47 Total derivative assets — 47,854 — 382,890 430,744 Other assets 11,950 13,554 — — 25,504 Total assets carried at fair value on a recurring basis $ 11,950 $ 13,657,057 $ 32,774 $ 382,890 $ 14,084,671 Carried at fair value on a nonrecurring basis (2) Mortgage loans held for portfolio $ — $ — $ 90 $ — $ 90 Total assets carried at fair value on a nonrecurring basis $ — $ — $ 90 $ — $ 90 Liabilities: Carried at fair value on a recurring basis Derivative liabilities Interest-rate-exchange agreements $ — $ (1,394,317) $ — $ 1,368,679 $ (25,638) Mortgage delivery commitments — (2) — — (2) Total liabilities carried at fair value on a recurring basis $ — $ (1,394,319) $ — $ 1,368,679 $ (25,640) December 31, 2021 Level 1 Level 2 Level 3 Netting (1) Total Assets: Carried at fair value on a recurring basis Trading securities: Corporate bonds $ — $ 1,442 $ — $ — $ 1,442 U.S. Treasury obligations — 500,425 — — 500,425 Total trading securities — 501,867 — — 501,867 Available-for-sale securities: U.S. Treasury obligations — 5,084,546 — — 5,084,546 HFA securities — — 62,265 — 62,265 Supranational institutions — 403,765 — — 403,765 U.S. government-owned corporations — 306,864 — — 306,864 GSE — 126,472 — — 126,472 U.S. government guaranteed – single-family MBS — 21,535 — — 21,535 U.S. government guaranteed – multifamily MBS — 541,405 — — 541,405 GSE – single-family MBS — 1,103,714 — — 1,103,714 GSE – multifamily MBS — 5,245,421 — — 5,245,421 Total available-for-sale securities — 12,833,722 62,265 — 12,895,987 Derivative assets: Interest-rate-exchange agreements — 3,850 — 374,560 378,410 CO Bond firm commitments — 54 — — 54 Mortgage delivery commitments — 68 — — 68 Total derivative assets — 3,972 — 374,560 378,532 Other assets 13,937 18,633 — — 32,570 Total assets carried at fair value on a recurring basis $ 13,937 $ 13,358,194 $ 62,265 $ 374,560 $ 13,808,956 Carried at fair value on a nonrecurring basis (2) Mortgage loans held for portfolio — — 3,860 — 3,860 REO — — 59 — 59 Total assets carried at fair value on a nonrecurring basis $ — $ — $ 3,919 $ — $ 3,919 Liabilities: Carried at fair value on a recurring basis Derivative liabilities Interest-rate-exchange agreements $ — $ (177,548) $ — $ 138,634 $ (38,914) CO Bond firm commitments — (30) — — (30) Total liabilities carried at fair value on a recurring basis $ — $ (177,578) $ — $ 138,634 $ (38,944) _______________________ (1) These amounts represent the effect of master-netting agreements intended to allow us to settle positive and negative positions and also cash collateral and related accrued interest held or placed with the same clearing member and/or counterparty. (2) We measure certain mortgage loans held for portfolio and REO at fair value on a nonrecurring basis, that is, they are not measured at fair value on an ongoing basis but are subject to fair-value adjustments only in certain circumstances. The fair values presented are as of the date the fair value adjustment was recorded.
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]	Table 15.3 presents a reconciliation of available-for-sale securities that are measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the years ended December 31, 2022, 2021, and 2020. Table 15.3 - Roll Forward of Level 3 Available-for-Sale Securities (dollars in thousands) For the Year ended December 31, 2022 2021 2020 HFA Securities HFA Securities HFA Securities Private-label MBS Balance at beginning of year $ 62,265 $ 122,549 $ 64,652 $ — Transfer of securities from held-to-maturity to available-for-sale — — 71,240 180,514 Total gains included in earnings Net gains on sale — — — 30,583 Reduction of provision for credit losses — — — 269 Accretion — — — 353 Total gains (losses) included in other comprehensive income Net unrealized (losses) gains (741) 3,316 6,517 (22,203) Sales, maturities, and settlements Sales — — — (187,366) Maturities (27,000) (61,320) (18,685) — Settlements (1,750) (2,280) (1,175) (2,150) Balance at end of year $ 32,774 $ 62,265 $ 122,549 $ — Total amount of unrealized (losses) gains for the period included in other comprehensive income relating to securities held at period end $ (960) $ 124 $ 5,823 $ —

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Off-Balance Sheet Commitments [Table Text Block]	Table 16.1 - Off-Balance Sheet Commitments (1) (dollars in thousands) December 31, 2022 December 31, 2021 Expire within one year Expire after one year Total Expire within one year Expire after one year Total Standby letters of credit outstanding (2) $ 10,148,761 $ 77,521 $ 10,226,282 $ 5,369,701 $ 132,096 $ 5,501,797 Commitments for unused lines of credit - advances (3) 1,123,269 — 1,123,269 1,095,844 — 1,095,844 Commitments to make additional advances 57,024 29,010 86,034 40,917 66,318 107,235 Commitments to invest in mortgage loans 3,454 — 3,454 3,164 — 3,164 Unsettled CO bonds, at par 172,140 — 172,140 260,000 — 260,000 Unsettled CO discount notes, at par 32,480 — 32,480 — — — __________________________ (1) We have determined that it is unnecessary to record any liability for credit losses on these agreements. (2) The amount of standby letters of credit outstanding excludes commitments to issue standby letters of credit that expire within one year. At December 31, 2022 and 2021, these amounts totaled $22.0 million and $16.1 million, respectively. Also excluded are commitments to issue standby letters of credit that expire after one year totaling $125 thousand at December 31, 2021. (3) Commitments for unused line-of-credit advances are generally for periods of up to 12 months. Since many of these commitments are not expected to be drawn upon, the total commitment amount does not necessarily indicate future liquidity requirements.

Transactions with Shareholders

Transactions with Shareholders (Tables)	12 Months Ended
	Dec. 31, 2022
Transactions with Shareholders [Abstract]
Schedule of Transactions with Shareholders, Shareholder Concentrations Balance Sheet [Table Text Block]	Table 17.1 - Shareholder Concentrations, Balance Sheet (dollars in thousands) Capital Stock Percent Par Percent of Total Par Value Total Accrued Percent of Total December 31, 2022 Citizens Bank, N.A. $ 363,769 17.8 % $ 8,519,007 20.4 % $ 5,662 7.8 % Webster Bank, N.A. 221,408 10.8 5,460,552 13.1 9,942 13.6
Schedule of Transactions with Shareholders, Transactions with Directors' Financial Institutions [Table Text Block]	Transactions with Directors' Institutions. We provide, in the ordinary course of business, products and services to members whose officers or directors serve on our board of directors. In accordance with FHFA regulations, transactions with directors' institutions are conducted on the same terms as those with any other member. Table 17.2 - Transactions with Directors' Institutions (dollars in thousands) Capital Stock Percent Par Percent of Total Par Value Total Accrued Percent of Total December 31, 2022 $ 374,123 18.3 % $ 8,683,521 20.8 % $ 5,803 8.0 % December 31, 2021 48,104 5.0 416,542 3.4 466 2.8

Background Information Narrativ

Background Information Narratives (Details)	Dec. 31, 2022
Background Information [Abstract]
Number of Federal Home Loan Banks	11
Number of states we conduct business	6

Summary of Significant Accoun_3

Summary of Significant Accounting Policies Narratives (Details) - USD ($) $ in Thousands	12 Months Ended			36 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Mar. 31, 2022
Accounting Policies [Line Items]
Cumulative effect adjustment recorded in interest income related to available-for-sale securities				$ 5,600
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other assets	Other assets
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other assets	Other assets
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Other liabilities	Other liabilities
Finance Lease, Liability, Statement of Financial Position [Extensible List]	Other liabilities	Other liabilities
Operating lease, right-of-use asset	$ 20,400
Operating lease, liability	$ 26,300
Quarterly percentage of net income contributed to restricted retained earnings per the Joint Capital Enhancement Agreement	20%
Percent of average balance of outstanding consolidated obligations prescribed per the Joint Capital Enhancement Agreement for each previous quarter	1%
Minimum [Member]
Accounting Policies [Line Items]
Premises, software, and equipment, useful life	3 years
Definition of related party, minimum percent	10%
Maximum [Member]
Accounting Policies [Line Items]
Premises, software, and equipment, useful life	10 years
Accounting Standards Update 2016-02 [Member]
Accounting Policies [Line Items]
Lease Right Of Use Asset	$ 2,400	$ 5,400
Lease Liability	2,200	5,300
Other Expense [Member]
Accounting Policies [Line Items]
Operating lease cost	$ 2,400	$ 2,600	$ 2,600

Cash and Due From Bank - Narrat

Cash and Due From Bank - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Cash and Due from Banks [Abstract]
Average collected cash balances with commercial banks	$ 87.2	$ 200.7

Investments Trading Securities

Investments Trading Securities by Major Security Type (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Corporate bonds [Member]
Debt and Equity Securities, FV-NI [Line Items]
Trading securities	$ 1,507	$ 1,442
US Treasury obligations [Member]
Debt and Equity Securities, FV-NI [Line Items]
Trading securities	0	500,425
Other Than MBS [Member]
Debt and Equity Securities, FV-NI [Line Items]
Trading securities	$ 1,507	$ 501,867

Unrealized and Realized Gains (

Unrealized and Realized Gains (Losses) on Trading Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Debt Securities, Trading, Gain (Loss) [Abstract]
Net gains (losses) on trading securities held at year-end	$ 65	$ (9,049)	$ (8,392)
Net losses on trading securities sold or matured during the year	(425)	(37,292)	(3,544)
Net losses on trading securities	$ (360)	$ (46,341)	$ (11,936)

Available-for-Sale Securities M

Available-for-Sale Securities Major Security Types (Details) - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	[1]	$ 13,977,197	$ 12,837,974
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Loss		3,390	112,861
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Loss		(353,671)	(54,848)
Available-for-sale securities Fair Value		13,626,916	12,895,987
Available-for-sale securities - accrued interest receivable		$ 43,100	$ 31,600
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]		Accrued interest receivable	Accrued interest receivable
US Treasury Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	[1]	$ 5,732,249	$ 5,081,536
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Loss		2,784	3,380
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Loss		(11,471)	(370)
Available-for-sale securities Fair Value		5,723,562	5,084,546
State housing-finance-agency obligations (HFA securities) [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	[1]	34,580	63,330
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Loss		0	2
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Loss		(1,806)	(1,067)
Available-for-sale securities Fair Value		32,774	62,265
Supranational institutions [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	[1]	355,767	409,337
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Loss		33	96
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Loss		(5,448)	(5,668)
Available-for-sale securities Fair Value		350,352	403,765
U.S. government-owned corporations [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	[1]	253,490	325,567
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Loss		0	0
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Loss		(26,290)	(18,703)
Available-for-sale securities Fair Value		227,200	306,864
GSE [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	[1]	104,530	130,143
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Loss		0	0
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Loss		(6,864)	(3,671)
Available-for-sale securities Fair Value		97,666	126,472
Other Than MBS [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	[1]	6,480,616	6,009,913
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Loss		2,817	3,478
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Loss		(51,879)	(29,479)
Available-for-sale securities Fair Value		6,431,554	5,983,912
U.S. government guaranteed - single-family MBS [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	[1]	18,737	21,435
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Loss		0	100
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Loss		(2,589)	0
Available-for-sale securities Fair Value		16,148	21,535
U.S. government guaranteed-multifamily MBS [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	[1]	531,184	541,238
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Loss		0	219
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Loss		(54,454)	(52)
Available-for-sale securities Fair Value		476,730	541,405
MBS [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	[1]	7,496,581	6,828,061
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Loss		573	109,383
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Loss		(301,792)	(25,369)
Available-for-sale securities Fair Value		7,195,362	6,912,075
Single Family [Member] | GSE – MBS [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	[1]	831,304	1,093,890
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Loss		251	9,945
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Loss		(66,029)	(121)
Available-for-sale securities Fair Value		765,526	1,103,714
Multifamily [Member] | GSE – MBS [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	[1]	6,115,356	5,171,498
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Loss		322	99,119
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Loss		(178,720)	(25,196)
Available-for-sale securities Fair Value		$ 5,936,958	$ 5,245,421
[1]Amortized cost of available-for-sale securities includes adjustments made to the cost basis of an investment for accretion, amortization, collection of cash, and fair-value hedge accounting adjustments. Amortized cost excludes accrued interest receivable

Available-for-Sale Securities S

Available-for-Sale Securities Securities in a Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	$ 8,303,380	$ 2,999,951
Less than 12 Months, Unrealized Losses	(222,692)	(25,739)
12 Months or More, Fair Value	3,217,708	872,569
12 Months or More, Unrealized Losses	(130,979)	(29,109)
Total Fair Value	11,521,088	3,872,520
Total Unrealized Losses	(353,671)	(54,848)
US Treasury Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	2,792,558	1,212,443
Less than 12 Months, Unrealized Losses	(7,428)	(370)
12 Months or More, Fair Value	1,077,821	0
12 Months or More, Unrealized Losses	(4,043)	0
Total Fair Value	3,870,379	1,212,443
Total Unrealized Losses	(11,471)	(370)
HFA securities [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	10,383	0
Less than 12 Months, Unrealized Losses	(77)	0
12 Months or More, Fair Value	22,391	50,053
12 Months or More, Unrealized Losses	(1,729)	(1,067)
Total Fair Value	32,774	50,053
Total Unrealized Losses	(1,806)	(1,067)
Supranational institutions [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	0	0
Less than 12 Months, Unrealized Losses	0	0
12 Months or More, Fair Value	337,485	389,180
12 Months or More, Unrealized Losses	(5,448)	(5,668)
Total Fair Value	337,485	389,180
Total Unrealized Losses	(5,448)	(5,668)
U.S. government-owned corporations [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	0	0
Less than 12 Months, Unrealized Losses	0	0
12 Months or More, Fair Value	227,200	306,864
12 Months or More, Unrealized Losses	(26,290)	(18,703)
Total Fair Value	227,200	306,864
Total Unrealized Losses	(26,290)	(18,703)
GSE [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	0	0
Less than 12 Months, Unrealized Losses	0	0
12 Months or More, Fair Value	97,666	126,472
12 Months or More, Unrealized Losses	(6,864)	(3,671)
Total Fair Value	97,666	126,472
Total Unrealized Losses	(6,864)	(3,671)
Other Than MBS [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	2,802,941	1,212,443
Less than 12 Months, Unrealized Losses	(7,505)	(370)
12 Months or More, Fair Value	1,762,563	872,569
12 Months or More, Unrealized Losses	(44,374)	(29,109)
Total Fair Value	4,565,504	2,085,012
Total Unrealized Losses	(51,879)	(29,479)
U.S. government guaranteed - single-family MBS [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	16,148
Less than 12 Months, Unrealized Losses	(2,589)
12 Months or More, Fair Value	0
12 Months or More, Unrealized Losses	0
Total Fair Value	16,148
Total Unrealized Losses	(2,589)
U.S. government guaranteed-multifamily MBS [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	310,447	187,437
Less than 12 Months, Unrealized Losses	(36,177)	(52)
12 Months or More, Fair Value	166,283	0
12 Months or More, Unrealized Losses	(18,277)	0
Total Fair Value	476,730	187,437
Total Unrealized Losses	(54,454)	(52)
MBS [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	5,500,439	1,787,508
Less than 12 Months, Unrealized Losses	(215,187)	(25,369)
12 Months or More, Fair Value	1,455,145	0
12 Months or More, Unrealized Losses	(86,605)	0
Total Fair Value	6,955,584	1,787,508
Total Unrealized Losses	(301,792)	(25,369)
GSEs - single-family [Member] | GSE – MBS [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	657,378	93,020
Less than 12 Months, Unrealized Losses	(52,285)	(121)
12 Months or More, Fair Value	77,892	0
12 Months or More, Unrealized Losses	(13,744)	0
Total Fair Value	735,270	93,020
Total Unrealized Losses	(66,029)	(121)
Multifamily [Member] | GSE – MBS [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	4,516,466	1,507,051
Less than 12 Months, Unrealized Losses	(124,136)	(25,196)
12 Months or More, Fair Value	1,210,970	0
12 Months or More, Unrealized Losses	(54,584)	0
Total Fair Value	5,727,436	1,507,051
Total Unrealized Losses	$ (178,720)	$ (25,196)

Available-for-Sale Securities b

Available-for-Sale Securities by Contractual Maturity (Details) - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	[1]	$ 13,977,197	$ 12,837,974
Fair Value		13,626,916	12,895,987
Other Than MBS [Member]
Debt Securities, Available-for-sale [Line Items]
Due in one year or less, amortized cost		250,015	27,000
Due in one year or less, fair value		250,198	26,780
Due after one year through five years, amortized cost		5,011,292	1,898,894
Due after one year through five years, fair value		4,998,056	1,898,308
Due after five years through 10 years, amortized cost		900,988	3,674,762
Due after five years through 10 years, fair value		897,913	3,671,798
Due after 10 years, amortized cost		318,321	409,257
Due after 10 years, fair value		285,387	387,026
Amortized Cost	[1]	6,480,616	6,009,913
Fair Value		6,431,554	5,983,912
MBS [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	[1]	7,496,581	6,828,061
Fair Value		7,195,362	6,912,075
Amortized Cost MBS	[2]	7,496,581	6,828,061
Fair Value MBS	[2]	$ 7,195,362	$ 6,912,075
[1]Amortized cost of available-for-sale securities includes adjustments made to the cost basis of an investment for accretion, amortization, collection of cash, and fair-value hedge accounting adjustments. Amortized cost excludes accrued interest receivable

Held-to-Maturity Securities by

Held-to-Maturity Securities by Major Security Type (Details) - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity fair value		$ 98,591	$ 148,068
Held-to-maturity securities - accrued interest receivable		$ 323	$ 200
Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]		Accrued interest receivable	Accrued interest receivable
U.S. government guaranteed - single-family MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	[1]	$ 3,614	$ 4,320
Gross Unrecognized Holding Gains		29	88
Gross Unrecognized Holding Losses		0	0
Held-to-maturity fair value		3,643	4,408
GSE – MBS [Member] | Single Family [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	[1]	95,454	141,172
Gross Unrecognized Holding Gains		420	2,605
Gross Unrecognized Holding Losses		(926)	(117)
Held-to-maturity fair value		94,948	143,660
MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	[1]	99,068	145,492
Gross Unrecognized Holding Gains		449	2,693
Gross Unrecognized Holding Losses		(926)	(117)
Held-to-maturity fair value		$ 98,591	$ 148,068
[1]Amortized cost of held-to-maturity securities includes adjustments made to the cost basis of an investment for accretion, amortization, and collection of cash. Amortized cost excludes accrued interest receivable

Proceeds and Gains (Losses) fro

Proceeds and Gains (Losses) from Sales of Investment Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale, Sale [Abstract]
Proceeds from sale	$ 142,733	$ 0	$ 187,366
Amortized cost, net of allowance for credit losses	142,735	0	156,783
Gross realized gains from sale	124	0	30,948
Gross realized losses from sale	(126)	0	(365)
Realized net (loss) gain from sale	(2)	0	30,583
Debt Securities, Held-to-maturity, Sale [Abstract]
Proceeds from sale	10,405	5,883	262,850
Carrying value	10,385	5,600	176,293
Noncredit losses recorded in accumulated other comprehensive income	0	0	39,144
Realized net gain from sale	$ 20	$ 283	$ 47,413

Allowance for Credit Losses on

Allowance for Credit Losses on Debt Securities (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)
Available-for-Sale, Allowance for Credit Loss
Balance at beginning of year	$ 0
Adjustments for cumulative effect of change in accounting principle	0	[1]
Transfers	634
Reduction of provision for credit losses due to sales of securities	(126)
Reduction of provision for credit losses	(143)
Charge-offs	(365)
Balance at end of year	0
Held-to-maturity, Allowance for Credit Loss
Balance at beginning of year	0
Adjustments for cumulative effect of change in accounting principle	5,308	[1]
Transfer	(634)
Reduction of provision for credit losses due to sales of securities	(3,205)
Reduction of provision for credit losses	(1,469)
Charge-offs	0
Balance at end of year	$ 0
[1]We adopted new accounting guidance for the measurement of credit losses on financial instruments on January 1, 2020. Upon adoption we recorded through a cumulative effect adjustment to retained earnings an increase in the allowance for credit losses associated with held-to-maturity private-label MBS.

Investments Narrative (Details)

Investments Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Percentage of short-term investments in interest-bearing deposits, securities purchased under agreements to resell, and federal funds sold assets rated below single-A		0%	0%
Allowance for credit losses for securities purchased under agreements to resell		$ 0	$ 0
Allowance for credit loss		1,900	1,700
Securities sold		10,385	5,600	$ 176,293
Realized net gain from sale		$ 20	283	47,413
Available for-Sale securities, rated single-A or above, based on amortized cost		100%
Held -to-maturity securities, rated single-A or above, based on amortized cost		100%
Interest Bearing Deposits and Federal Funds Sold [Member]
Allowance for credit loss		$ 0	0
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Accounting Standards Update 2020-04 [Member]
Securities sold	$ 82,200
Realized net gain from sale	$ 6,200
Held-to-maturity Securities [Member]
Securities sold		10,400	5,600	133,200
Realized net gain from sale		$ 20	$ 283	$ 41,200

Advances - Outstanding by Year

Advances - Outstanding by Year of Contractual Maturity (Details) - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
Federal Home Loan Bank, Advances, Maturity, Rolling Year, Par Value [Abstract]
Overdrawn demand-deposit accounts		$ 2,000	$ 64
Due in one year or less		24,563,604	5,064,776
Due after one year through two years		10,260,956	1,354,297
Due after two years through three years		2,034,070	1,541,076
Due after three years through four years		775,951	2,173,238
Due after four years through five years		1,775,923	1,310,971
Due after five years through fifteen years		2,377,747	871,692
Thereafter		40,525	31,591
Total par value		41,830,776	12,347,705
Discounts		(34,257)	(34,926)
Fair value of bifurcated derivatives	[1]	400	11,890
Hedging adjustments		(197,338)	15,351
Total Advances	[2]	$ 41,599,581	$ 12,340,020
Federal Home Loan Bank, Advances, Weighted Average Interest Rate, Rolling Year [Abstract]
Overdrawn demand-deposit accounts, Weighted average rate		4.48%	0.60%
Due in one year or less, Weighted average rate		4.26%	0.76%
Due after one year through two years, Weighted average rate		4.05%	2.26%
Due after two years through three years, Weighted average rate		2.10%	1.64%
Due after three years through four years, Weighted average rate		2.35%	1.43%
Due after four years through five years, Weighted average rate		3.76%	1.07%
Due after five years through fifteen years, Weighted average rate		2.53%	2.11%
Thereafter, Weighted average rate		1.41%	1.33%
Total Weighted average rate		3.94%	1.28%
Federal Home Loan Bank Advances Receivable
Federal Home Loan Bank, Advances, Maturity, Rolling Year, Par Value [Abstract]
Advances accrued interest receivable		$ 72,900	$ 16,300
[1]At December 31, 2022 and 2021, 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 $72.9 million and $16.3 million at December 31, 2022 and 2021, respectively.

Advances - Outstanding by Yea_2

Advances - Outstanding by Year of Contractual Maturity or Next Call Date (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Call Date, Rolling Year, Par Value [Abstract]
Overdrawn demand-deposit accounts	$ 2,000	$ 64
Due in one year or less	33,919,899	6,116,251
Due after one year through two years	1,718,681	1,354,297
Due after two years through three years	1,986,570	1,249,001
Due after three years through four years	711,351	2,106,238
Due after four years through five years	1,078,603	632,271
Due after five years through fifteen years	2,373,147	857,992
Thereafter	40,525	31,591
Total par value	$ 41,830,776	$ 12,347,705

Advances - Outstanding by Yea_3

Advances - Outstanding by Year of Contractual Maturity or Next Put Date (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Put or Convert Date, Rolling Year, Par Value [Abstract]
Overdrawn demand-deposit accounts	$ 2,000	$ 64
Due in one year or less	25,751,204	6,088,201
Due after one year through two years	10,525,456	908,797
Due after two years through three years	2,000,070	1,497,076
Due after three years through four years	750,951	1,709,313
Due after four years through five years	1,184,423	1,277,471
Due after five years through fifteen years	1,576,147	835,192
Thereafter	40,525	31,591
Total par value	$ 41,830,776	$ 12,347,705

Advances - by Current Interest

Advances - by Current Interest Rate Terms (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Federal Home Loan Bank, Advances, Fixed Rate [Abstract]
Due in one year or less - fixed rate	$ 24,190,034	$ 3,803,476
Due after one year - fixed rate	7,786,877	6,195,290
Total fixed-rate	31,976,911	9,998,766
Federal Home Loan Bank, Advances, Floating Rate [Abstract]
Due in one year or less - variable rate	375,570	1,261,364
Due after one year - variable rate	9,478,295	1,087,575
Total variable-rate	9,853,865	2,348,939
Total par value	$ 41,830,776	$ 12,347,705

Advances - Prepayment Fees (Det

Advances - Prepayment Fees (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Federal Home Loan Bank Advances Prepayment Fees [Abstract]
Prepayment fees received from borrowers	$ 1,726	$ 54,537	$ 32,340
Hedging fair-value adjustments on prepaid advances	1,280	(6,356)	(8,013)
Net discounts (premiums) associated with prepaid advances	303	(14,162)	(299)
Advance prepayment fees recognized in income, net	$ 3,309	$ 34,019	$ 24,028

Advances - Narratives (Details)

Advances - Narratives (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Federal Home Loan Bank, Advances [Line Items]
Allowance for credit lossed on advances	$ 1,900	$ 1,700
Federal Home Loan Bank Advances Receivable
Federal Home Loan Bank, Advances [Line Items]
Nonaccrual status on advances	0	0
Impaired advances	0	0
Troubled debt restructuring related to advances	0	0
Allowance for credit lossed on advances	0	0
Federal Home Loan Bank Advances Receivable | Financial Asset, Past Due
Federal Home Loan Bank, Advances [Line Items]
Past due advances	$ 0	$ 0
Minimum [Member]
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank Advances Maturities	1 day
Interest rates of advances outstanding	0%	0%
Maximum [Member]
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank Advances Maturities	30 years
Interest rates of advances outstanding	6.23%	7.72%

Mortgage Loans Held for Portf_3

Mortgage Loans Held for Portfolio (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: Allowance for credit losses		$ (1,900)	$ (1,700)
Total mortgage loans, net of allowance for credit losses		$ 2,758,429	$ 3,120,159
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]		Accrued interest receivable	Accrued interest receivable
Fixed-rate 15-year single-family mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Original contractual terms		15 years
Fixed-rate 20- and 30-year single-family mortgages | Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Original contractual terms		20 years
Fixed-rate 20- and 30-year single-family mortgages | Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Original contractual terms		30 years
Residential Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Par Value		$ 2,720,351	$ 3,072,075
Premiums		40,305	48,043
Discounts		(1,660)	(671)
Deferred derivative gains, net		1,333	2,412
Total mortgage loans held for portfolio	[1]	2,760,329	3,121,859
Less: Allowance for credit losses		(1,900)	(1,700)
Total mortgage loans, net of allowance for credit losses		2,758,429	3,120,159
Mortgage loans held for portfolio, accrued interest receivable		14,300	15,700
Single Family [Member] | Fixed-rate 15-year single-family mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Par Value		224,307	278,393
Single Family [Member] | Fixed-rate 20- and 30-year single-family mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Par Value		$ 2,496,044	$ 2,793,682
[1] Excludes accrued interest receivable

Mortgage Loans Held for Portf_4

Mortgage Loans Held for Portfolio by Collateral/Guarantee Type (Details) - Residential Portfolio Segment - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Par Value	$ 2,720,351	$ 3,072,075
Government Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Par Value	163,121	191,721
Conventional Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Par Value	$ 2,557,230	$ 2,880,354

Credit Quality Indicator for Co

Credit Quality Indicator for Conventional Mortgage Loans (Details) - Conventional Mortgage Loans [Member] - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Originated five or more years before latest fiscal year	[1]	$ 1,183,590	$ 1,176,078
Originated current fiscal year and preceding four fiscal years	[1]	1,410,562	1,750,347
Total mortgage loans held for portfolio	[1]	2,594,152	2,926,425
Past due 30-59 days delinquent [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Originated five or more years before latest fiscal year	[1]	9,640	7,719
Originated current fiscal year and preceding four fiscal years	[1]	9,274	8,053
Total mortgage loans held for portfolio	[1]	18,914	15,772
Past due 60-89 days delinquent [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Originated five or more years before latest fiscal year	[1]	2,844	3,312
Originated current fiscal year and preceding four fiscal years	[1]	1,554	2,660
Total mortgage loans held for portfolio	[1]	4,398	5,972
Past due 90 days or more delinquent [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Originated five or more years before latest fiscal year	[1]	9,638	11,932
Originated current fiscal year and preceding four fiscal years	[1]	5,444	9,196
Total mortgage loans held for portfolio	[1]	15,082	21,128
Total past due
Financing Receivable, Credit Quality Indicator [Line Items]
Originated five or more years before latest fiscal year	[1]	22,122	22,963
Originated current fiscal year and preceding four fiscal years	[1]	16,272	19,909
Total mortgage loans held for portfolio	[1]	38,394	42,872
Total current loans
Financing Receivable, Credit Quality Indicator [Line Items]
Originated five or more years before latest fiscal year	[1]	1,161,468	1,153,115
Originated current fiscal year and preceding four fiscal years	[1]	1,394,290	1,730,438
Total mortgage loans held for portfolio	[1]	$ 2,555,758	$ 2,883,553
[1]Amortized cost excludes accrued interest receivable.

Other Delinquency Statistics of

Other Delinquency Statistics of Mortgage Loans (Details) - USD ($) $ in Thousands		Dec. 31, 2022		Dec. 31, 2021
Mortgage Loans Past Due [Line Items]
In process of foreclosure	[1]	$ 3,789		$ 1,721
Residential Portfolio Segment
Mortgage Loans Past Due [Line Items]
Past due 90 days or more still accruing interest		2,359		4,383
Loans on nonaccrual status		$ 15,246	[2]	$ 21,529	[3]
Past due 90 days or more delinquent [Member] | Residential Portfolio Segment
Mortgage Loans Past Due [Line Items]
Serious delinquency rate	[4]	0.63%		0.83%
Recorded Investment in Government Mortgage Loans [Member]
Mortgage Loans Past Due [Line Items]
In process of foreclosure	[1]	$ 891		$ 935
Recorded Investment in Government Mortgage Loans [Member] | Residential Portfolio Segment
Mortgage Loans Past Due [Line Items]
Past due 90 days or more still accruing interest		2,359		4,383
Loans on nonaccrual status		$ 0	[2]	$ 0	[3]
Recorded Investment in Government Mortgage Loans [Member] | Past due 90 days or more delinquent [Member] | Residential Portfolio Segment
Mortgage Loans Past Due [Line Items]
Serious delinquency rate	[4]	1.42%		2.24%
Recorded Investment in Conventional Mortgage Loans [Member]
Mortgage Loans Past Due [Line Items]
In process of foreclosure	[1]	$ 2,898		$ 786
Mortgage loans on non-accrual status with no allowance for credit losses		8,700		11,800
Recorded Investment in Conventional Mortgage Loans [Member] | Residential Portfolio Segment
Mortgage Loans Past Due [Line Items]
Past due 90 days or more still accruing interest		0		0
Loans on nonaccrual status		$ 15,246	[2]	$ 21,529	[3]
Recorded Investment in Conventional Mortgage Loans [Member] | Past due 90 days or more delinquent [Member] | Residential Portfolio Segment
Mortgage Loans Past Due [Line Items]
Serious delinquency rate	[4]	0.58%		0.74%
[1]Includes loans where the decision of foreclosure or similar alternative such as pursuit of deed-in-lieu of foreclosure has been reported.[2]As of December 31, 2022 and 2021, $8.7 million and $11.8 million, respectively, of conventional mortgage loans on nonaccrual status did not have an associated allowance for credit losses because either these loans were charged off or the fair value of the underlying collateral, including any credit enhancements, is greater than the amortized cost of the loans.[3]of December 31, 2022 and 2021, $8.7 million and $11.8 million, respectively, of conventional mortgage loans on nonaccrual status did not have an associated allowance for credit losses because either these loans were charged off or the fair value of the underlying collateral, including any credit enhancements, is greater than the amortized cost of the loans.[4]Loans that are 90 days or more past due or in the process of foreclosure expressed as a percentage of the recorded investment in the total loan portfolio class.

Allowance for Credit Losses o_2

Allowance for Credit Losses on Conventional Mortgage Loans (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, beginning of year		$ 1,700
Balance, end of year		1,900	$ 1,700
Residential Portfolio Segment
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, beginning of year		1,700
Balance, end of year		1,900	1,700
Conventional Mortgage Loans [Member] | Residential Portfolio Segment
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, beginning of year	[1]	1,700	3,100	$ 500
Adjustment for cumulative effect of change in accounting principle	[1]	0	0	2,221
Recoveries (charge-offs)	[1]	29	62	(207)
Provision for (reduction of) credit losses	[1]	171	(1,462)	586
Balance, end of year	[1]	$ 1,900	$ 1,700	$ 3,100
[1]These amounts exclude government mortgage loans because we make no allowance for credit losses based on our investments in government mortgage loans, as discussed below under — Government Mortgage Loans Held for Portfolio.

Mortgage Loans Held for Portf_5

Mortgage Loans Held for Portfolio Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2022		Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Maximum Exposure Under First Loss Account	$ 31,600		$ 31,900
Allowance for credit losses - mortgage loans held for portfolio	1,900		1,700
Residential Portfolio Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Allowance for credit losses - mortgage loans held for portfolio	1,900		1,700
Government mortgage loans placed on non-accrual status	15,246	[1]	21,529	[2]
Real Estate Loan
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded investment of trouble debt restructuring	9,100		8,000
Government Mortgage Loans [Member] | Residential Portfolio Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Allowance for credit losses - mortgage loans held for portfolio	0		0
Government mortgage loans placed on non-accrual status	$ 0	[1]	$ 0	[2]
[1]As of December 31, 2022 and 2021, $8.7 million and $11.8 million, respectively, of conventional mortgage loans on nonaccrual status did not have an associated allowance for credit losses because either these loans were charged off or the fair value of the underlying collateral, including any credit enhancements, is greater than the amortized cost of the loans.[2]of December 31, 2022 and 2021, $8.7 million and $11.8 million, respectively, of conventional mortgage loans on nonaccrual status did not have an associated allowance for credit losses because either these loans were charged off or the fair value of the underlying collateral, including any credit enhancements, is greater than the amortized cost of the loans.

Derivatives and Hedging Activ_3

Derivatives and Hedging Activities Derivatives in Statement of Condition (Details) - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		$ 39,892,614	$ 28,939,545
Derivative Assets, before netting and collateral adjustments		47,854	3,972
Derivative Liabilities, before netting and collateral adjustments		(1,394,319)	(177,578)
Derivative Asset, netting adjustments and cash collateral including related accrued interest	[1],[2]	382,890	374,560
Derivative Liability, netting adjustments and cash collateral including related accrued interest	[1],[2]	1,368,679	138,634
Derivative assets		430,744	378,532
Derivative liabilities		(25,640)	(38,944)
Cash collateral and related accrued interest posted		1,800,000	513,200
COs - bonds [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, before netting and collateral adjustments		50	54
Derivative Liabilities, before netting and collateral adjustments			(30)
Derivative assets		50	54
Derivative liabilities			(30)
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		39,747,160	27,980,956
Derivative Assets, before netting and collateral adjustments		47,756	410
Derivative Liabilities, before netting and collateral adjustments		(1,394,091)	(163,885)
Designated as Hedging Instrument [Member] | Interest-rate swaps [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		38,356,160	26,589,956
Derivative Assets, before netting and collateral adjustments		47,000	362
Derivative Liabilities, before netting and collateral adjustments		(1,394,051)	(163,457)
Designated as Hedging Instrument [Member] | Forward-start interest-rate swaps [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		1,391,000	1,391,000
Derivative Assets, before netting and collateral adjustments		756	48
Derivative Liabilities, before netting and collateral adjustments		(40)	(428)
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		145,454	958,589
Derivative Assets, before netting and collateral adjustments		98	3,562
Derivative Liabilities, before netting and collateral adjustments		(228)	(13,693)
Not Designated as Hedging Instrument [Member] | Interest-rate swaps [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		107,000	900,425
Derivative Assets, before netting and collateral adjustments		1	3,440
Derivative Liabilities, before netting and collateral adjustments		(226)	(13,663)
Not Designated as Hedging Instrument [Member] | COs - bonds [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		35,000	55,000
Derivative Assets, before netting and collateral adjustments		50	54
Derivative Liabilities, before netting and collateral adjustments		0	(30)
Mortgage Receivable [Member] | Mortgage-delivery commitments [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, before netting and collateral adjustments		47	68
Derivative Liabilities, before netting and collateral adjustments		(2)
Derivative assets		47	68
Derivative liabilities		(2)
Mortgage Receivable [Member] | Not Designated as Hedging Instrument [Member] | Mortgage-delivery commitments [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	[3]	3,454	3,164
Derivative Assets, before netting and collateral adjustments	[3]	47	68
Derivative Liabilities, before netting and collateral adjustments	[3]	$ (2)	$ 0
[1]Amounts represent the effect of master-netting agreements intended to allow us to settle positive and negative positions with the same counterparty. Cash collateral posted, including accrued interest, was $1.8 billion and $513.2 million at December 31, 2022, and 2021, respectively. The change in cash collateral posted is included in the net change in interest-bearing deposits in the statement of cash flows.[2]These amounts represent the effect of master-netting agreements intended to allow us to settle positive and negative positions and also cash collateral and related accrued interest held or placed with the same clearing member and/or counterparty.[3]Mortgage-delivery commitments are classified as derivatives with changes in fair value recorded in other income.

Derivatives and Hedging Activ_4

Derivatives and Hedging Activities Derivatives in Statement of Income and Impact on Interest Income/Expense (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Interest income on advances		$ 631,838	$ 170,003	$ 400,286
Interest income on available-for-sale securities		354,512	73,314	63,243
Interest expense on consolidated obligations bonds		(591,546)	(210,052)	(374,449)
Advances [Member] | Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net changes in fair value before price alignment interest		3,217	969	(1,026)
Advances [Member] | Interest Rate Contract [Member] | Interest Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives		209,234	85,265	(82,885)
Hedged items		(206,017)	(84,296)	81,859
Price alignment interest	[1]	(2,285)	20	484
Net interest settlements on derivatives	[2],[3]	7,704	(60,285)	(53,615)
Net gains (losses) on qualifying fair-value hedging relationships		8,636	(59,296)	(54,157)
Amortization/accretion of discontinued hedging relationships		(990)	(2,064)	(1,937)
Net gains (losses) on derivatives and hedging activities recorded in net interest income		7,646	(61,360)	(56,094)
Available-for-sale Securities [Member] | Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net changes in fair value before price alignment interest		41,134	7,575	(6,821)
Available-for-sale Securities [Member] | Interest Rate Contract [Member] | Interest Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives		1,438,662	280,707	(270,047)
Hedged items		(1,397,528)	(273,132)	263,226
Price alignment interest	[1]	(12,540)	66	1,373
Net interest settlements on derivatives	[2],[3]	33,981	(120,524)	(70,317)
Net gains (losses) on qualifying fair-value hedging relationships		62,575	(112,883)	(75,765)
Amortization/accretion of discontinued hedging relationships		0	0	0
Net gains (losses) on derivatives and hedging activities recorded in net interest income		62,575	(112,883)	(75,765)
COs - bonds [Member] | Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net changes in fair value before price alignment interest		985	100	(1,542)
COs - bonds [Member] | Interest Rate Contract [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives		(1,206,071)	(197,016)	25,811
Hedged items		1,207,056	197,116	(27,353)
Price alignment interest	[1]	391	(4)	(204)
Net interest settlements on derivatives	[2],[3]	(114,582)	67,028	23,843
Net gains (losses) on qualifying fair-value hedging relationships		(113,206)	67,124	22,097
Amortization/accretion of discontinued hedging relationships		2,045	2,804	3,322
Net gains (losses) on derivatives and hedging activities recorded in net interest income		$ (111,161)	$ 69,928	$ 25,419
[1]Relates to derivatives for which variation margin payments are characterized as daily settled contracts.[2]Excludes the interest income/expense of the respective hedged items recorded in net interest income.[3]Represents interest income/expense on derivatives in qualifying fair-value hedging relationships. Net interest settlements on derivatives that are not in qualifying fair-value hedging relationships are reported in other income.

Derivatives and Hedging Activ_5

Derivatives and Hedging Activities Net Gains (Losses) on Cash Flow Hedging Relationships (Details) - Forward-start interest rate swaps [Member] - COs - bonds [Member] - Designated as Hedging Instrument [Member] - Cash Flow Hedging [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Interest Expense [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Losses reclassified from accumulated other comprehensive loss into interest expense	$ (5,539)	$ (5,949)	$ (7,029)
Other Comprehensive Income (Loss) [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gains (losses) recognized in other comprehensive income	$ 63,235	$ (7,875)	$ (1,187)

Derivatives and Hedging Activ_6

Derivatives and Hedging Activities Basis Adjustments for Fair Value Hedges (Details) $ in Thousands	Dec. 31, 2022 USD ($)
Advances [Member]
Derivatives, Fair Value [Line Items]
Amortized Cost of Hedged Asset/(Liability)	$ 3,855,472	[1]
Basis Adjustments for Active Hedging Relationships Included in Amortized Cost	(199,540)
Basis Adjustments for Discontinued Hedging Relationships Included in Amortized Cost	2,202
Cumulative Amount of Fair Value Hedging Basis Adjustments	(197,338)
Available-for-sale Securities [Member]
Derivatives, Fair Value [Line Items]
Amortized Cost of Hedged Asset/(Liability)	11,288,325	[1]
Basis Adjustments for Active Hedging Relationships Included in Amortized Cost	(1,190,434)
Basis Adjustments for Discontinued Hedging Relationships Included in Amortized Cost	0
Cumulative Amount of Fair Value Hedging Basis Adjustments	(1,190,434)
COs - bonds [Member]
Derivatives, Fair Value [Line Items]
Amortized Cost of Hedged Asset/(Liability)	20,338,009	[1]
Basis Adjustments for Active Hedging Relationships Included in Amortized Cost	(1,382,685)
Basis Adjustments for Discontinued Hedging Relationships Included in Amortized Cost	29,504
Cumulative Amount of Fair Value Hedging Basis Adjustments	$ (1,353,181)
[1]Includes only the amortized cost of hedged items in fair-value hedging relationships.

Derivatives and Hedging Activ_7

Derivatives and Hedging Activities Derivatives in Statement of Income and Impact on Other Income/Loss (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Net (losses) gains on derivatives and hedging activities		$ (678)	$ (559)	$ (49,674)
Interest-rate swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net (losses) gains on derivatives and hedging activities		(530)	(2,183)	(51,187)
CO Bonds firm commitments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net (losses) gains on derivatives and hedging activities		520	1,734	0
Total net (losses) gains related to derivatives not designated as hedging instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net (losses) gains on derivatives and hedging activities		(678)	(567)	(49,782)
Other [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net (losses) gains on derivatives and hedging activities	[1]	0	8	108
Mortgage Receivable [Member] | Mortgage-delivery commitments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net (losses) gains on derivatives and hedging activities		$ (668)	$ (118)	$ 1,405
[1]Consists of price alignment amount on derivatives for which variation margin is characterized as a daily settlement amount.

Impact of Variation Margin for

Impact of Variation Margin for Cleared Derivatives on the Statement of Cash Flow (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Financing activity - net payments on derivatives with financing element	$ (125,890)	$ (31,794)	$ 76,415
Cleared derivatives [Member]
Derivative [Line Items]
Operating activity - net change in derivatives and hedging activities	1,633,293	257,727	(321,862)
Financing activity - net payments on derivatives with financing element	161,289	69,021	(53,832)
Total variation margin received (posted) on clear derivatives	$ 1,794,582	$ 326,748	$ (375,694)

Derivatives and Hedging Activ_8

Derivatives and Hedging Activities Fair Value of Derivative Instruments With or Without Legal Rights of Offset (Details) - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
Offsetting Assets [Line Items]
Derivative Assets, Netting Adjustments and Cash Collateral	[1],[2]	$ 382,890	$ 374,560
Derivative liability, Netting Adjustments and Cash Collateral	[1],[2]	1,368,679	138,634
Derivative Assets, before netting and collateral adjustments		47,854	3,972
Derivative Liabilities, before netting and collateral adjustments		(1,394,319)	(177,578)
Derivative assets		430,744	378,532
Derivative liabilities		(25,640)	(38,944)
Derivative Asset, Fair value, amount offset against collateral		430,744	378,532
Derivative Liability, Fair value, amount offset against collateral		(25,640)	(10,570)
Derivative Liabilities, additional net exposure, collateral pledged to counterparties in excess of net liabilities		0	0
Unsettled CO bonds, at par [Member]
Offsetting Assets [Line Items]
Derivative Assets, before netting and collateral adjustments		50	54
Derivative Liabilities, before netting and collateral adjustments			(30)
Derivative assets		50	54
Derivative liabilities			(30)
Derivative Asset, Fair value, amount offset against collateral		50	54
Derivative Liability, Fair value, amount offset against collateral			(30)
Uncleared derivatives [Member] | Interest-rate swaps [Member]
Offsetting Assets [Line Items]
Derivative Asset, total gross recognized amount		23,782	327
Derivative Liability, total gross recognized amount		(1,393,632)	(171,374)
Derivative Assets, Netting Adjustments and Cash Collateral	[3]	(23,782)	(103)
Derivative liability, Netting Adjustments and Cash Collateral	[3]	1,367,994	132,460
Derivative assets		0	224
Derivative liabilities		(25,638)	(38,914)
Derivative, Collateral, Obligation To Return Securities That Cannot Be Sold Or Repledged	[4]	0	0
Derivative Liabilities, fair value of securities pledged as collateral that cannot be sold or repledged	[4]	0	28,374
Derivative Asset, Fair value, amount offset against collateral		0	224
Derivative Liability, Fair value, amount offset against collateral		(25,638)	(10,540)
Cleared derivatives [Member] | Interest-rate swaps [Member]
Offsetting Assets [Line Items]
Derivative Asset, total gross recognized amount		23,975	3,523
Derivative Liability, total gross recognized amount		(684)	(6,175)
Derivative Assets, Netting Adjustments and Cash Collateral	[3]	406,672	374,663
Derivative liability, Netting Adjustments and Cash Collateral	[3]	684	6,175
Derivative assets		430,647	378,186
Derivative liabilities		0	0
Derivative, Collateral, Obligation To Return Securities That Cannot Be Sold Or Repledged	[4]	0	0
Derivative Liabilities, fair value of securities pledged as collateral that cannot be sold or repledged	[4]	0	0
Derivative Asset, Fair value, amount offset against collateral		430,647	378,186
Derivative Liability, Fair value, amount offset against collateral		0	0
Mortgage Receivable [Member] | Mortgage-delivery commitments [Member]
Offsetting Assets [Line Items]
Derivative Assets, before netting and collateral adjustments		47	68
Derivative Liabilities, before netting and collateral adjustments		(2)
Derivative assets		47	68
Derivative liabilities		(2)
Derivative Asset, Fair value, amount offset against collateral		47	$ 68
Derivative Liability, Fair value, amount offset against collateral		$ (2)
[1]Amounts represent the effect of master-netting agreements intended to allow us to settle positive and negative positions with the same counterparty. Cash collateral posted, including accrued interest, was $1.8 billion and $513.2 million at December 31, 2022, and 2021, respectively. The change in cash collateral posted is included in the net change in interest-bearing deposits in the statement of cash flows.[2]These amounts represent the effect of master-netting agreements intended to allow us to settle positive and negative positions and also cash collateral and related accrued interest held or placed with the same clearing member and/or counterparty.[3]Includes gross amounts of netting adjustments and cash collateral.[4]Includes non-cash collateral at fair value that cannot be sold or repledged by the counterparty. Additionally, any overcollateralization with a counterparty is not included in the determination of the net amount. There was no overcollateralization at either December 31, 2022 or 2021.

Derivatives and Hedging Activ_9

Derivatives and Hedging Activities Narratives (Details) - USD ($)		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Reclassifications from accumulated other comprehensive loss into earnings as a result of the discontinuance of cash-flow hedges		$ 0	$ 0	$ 0
Maximum length of time which we are hedging our exposure to the variability in future cash flows for forecasted transactions		9 years
Deferred net losses on derivatives accumulated in other comprehensive loss related to cash flow hedges expected to be reclassified to earnings during the next 12 months		$ 4,400,000
Aggregate fair value of all uncleared derivatives in a net-liability position (before cash collateral and related accrued interest)		1,400,000,000
Post-haircut value of collateral already posted		1,300,000,000
Rating Downgrade from AAPlus to AA or AAMinus [Member]
Derivative [Line Items]
Incremental collateral	[1]	0
Rating Downgrade From AAMinus to APlus, A or AMinus [Member]
Derivative [Line Items]
Incremental collateral	[1]	0
Rating Downgrade From AMinus to below AMinus [Member]
Derivative [Line Items]
Incremental collateral	[1]	$ 70,047,000
[1]Ratings are expressed in this table according to S&P's conventions but include the equivalent of such rating by Moody's. If there is a split rating, the lower rating is used.

Deposits Narratives (Details)

Deposits Narratives (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Deposits [Abstract]
Average interest rates paid on average deposits	1.01%	0.01%
Interest-bearing deposits demand and overnight	$ 632,635	$ 831,009
Interest-bearing deposits other	1,867	1,998
Non-interest bearing deposits other	20,985	51,025
Total deposits	$ 655,487	$ 884,032

CO Bonds Outstanding by Contrac

CO Bonds Outstanding by Contractual Maturity (Details) - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
Schedule of Short-term and Long-term Debt [Line Items]
Due in one year or less, weighted average rate	[1]	3.15%	0.79%
Due after one year through two years, weighted average rate	[1]	1.85%	1.18%
Due after two years through three years, weighted average rate	[1]	1.70%	1.09%
Due after three years through four years, weighted average rate	[1]	1.10%	0.88%
Due after four years through five years, weighted average rate	[1]	2.24%	0.91%
Thereafter, weighted average rate	[1]	2.09%	1.91%
Total par value		$ 32,898,855	$ 26,725,180
Hedging adjustments		(1,353,181)	(143,388)
Total		31,565,543	26,613,032
COs - bonds [Member]
Schedule of Short-term and Long-term Debt [Line Items]
Due in one year or less		10,616,385	6,919,220
Due after one year through two years		5,321,650	3,069,155
Due after two years through three years		4,993,600	3,514,735
Due after three years through four years		5,951,355	3,029,600
Due after four years through five years		2,099,000	5,735,605
Thereafter		3,916,865	4,456,865
Total par value		$ 32,898,855	$ 26,725,180
Total par value, weighted average rate	[1]	2.17%	1.10%
Premiums		$ 27,902	$ 40,251
Discounts		$ (8,033)	$ (9,011)
[1]The CO bonds' weighted-average rate excludes concession fees.

CO Bonds Outstanding by Call Fe

CO Bonds Outstanding by Call Feature (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Total par value	$ 32,898,855	$ 26,725,180
Noncallable and nonputable
Debt Instrument [Line Items]
Total par value	15,039,805	13,924,180
Callable
Debt Instrument [Line Items]
Total par value	$ 17,859,050	$ 12,801,000

CO Bonds Outstanding by Contr_2

CO Bonds Outstanding by Contractual Maturity or Next Call Date (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Total par value	$ 32,898,855	$ 26,725,180
Earlier Of Contractual Maturity Or Next Call Date [Member]
Debt Instrument [Line Items]
Due in one year or less	26,319,885	19,150,220
Due after one year through two years	1,843,150	3,461,155
Due after two years through three years	1,952,600	1,044,735
Due after three years through four years	1,370,355	1,544,600
Due after four years through five years	438,000	539,605
Thereafter	974,865	984,865
Total par value	$ 32,898,855	$ 26,725,180

CO Bonds by Interest Rate-Payme

CO Bonds by Interest Rate-Payment Type (Details) - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Total par value		$ 32,898,855	$ 26,725,180
Fixed-rate [Member]
Debt Instrument [Line Items]
Total par value		22,667,605	17,707,180
Step-up [Member]
Debt Instrument [Line Items]
Total par value	[1]	6,031,250	4,215,000
Simple variable-rate [Member]
Debt Instrument [Line Items]
Total par value		$ 4,200,000	$ 4,803,000
[1]Step-up bonds pay interest at increasing fixed rates for specified intervals over the life of the CO bond and can be called at our option on the step-up dates.

CO Discount Notes Outstanding (

CO Discount Notes Outstanding (Details) - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
Debt Disclosure [Abstract]
Federal Home Loan Bank, Consolidated Obligations, Discount Notes		$ 26,975,260	$ 2,275,320
Par value		$ 27,109,244	$ 2,275,519
Weighted Average Rate	[1]	4.22%	0.05%
[1]CO discount notes' weighted-average rate represents a yield to maturity excluding concession fees.

CO Bonds - Narratives (Details)

CO Bonds - Narratives (Details) - USD ($) $ in Billions	Dec. 31, 2022	Dec. 31, 2021
Debt Disclosure [Abstract]
Obligation with Joint and Several Liability Arrangement, Amount Outstanding	$ 1,200	$ 652.9

Affordable Housing Program Narr

Affordable Housing Program Narratives (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Affordable Housing Program [Line Items]
AHP voluntary contribution	$ 5,479	$ 4,761	$ 1,614
Affordable Housing Program total combined contribution	26,000	12,500	15,000
Affordable Housing Program [Roll Forward]
Balance at beginning of year	70,503	78,640
AHP expense for the period	20,521	7,739	13,386
AHP voluntary contribution	5,479	4,761	1,614
AHP direct grant disbursements	(17,683)	(17,980)	(21,374)
AHP subsidy for AHP advance disbursements	(3,155)	(5,806)
Return of previously disbursed grants and subsidies	957	3,149
Balance at end of year	$ 76,622	$ 70,503	$ 78,640
FHLBanks [Member]
Affordable Housing Program [Line Items]
Affordable Housing Program Contribution Requirement, Percent	10%
Affordable Housing Program Contribution Requirement, Amount	$ 100,000

Regulatory Capital Requirements

Regulatory Capital Requirements (Details) $ in Thousands	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Banking Regulation, Total Capital [Abstract]
Capital-to-asset ratio, Required	4%	4%
Leverage capital-to-assets ratio, Required	5%	5%
Multiplier for Determining Permanent Capital in Leverage Capital Calculation	1.5
Class B capital stock	$ 2,031,178	$ 953,638
Mandatorily redeemable capital stock	10,290	13,562	$ 6,282	$ 5,806
Retained earnings	1,690,568	1,548,406
Total permanent capital	3,732,036	2,515,606
Credit-risk capital	130,875	84,301
Market-risk capital	225,813	213,467
Operations-risk capital	107,006	89,330
Total risk-based capital requirement	463,694	387,098
Permanent capital in excess of risk-based capital requirement	3,268,342	2,128,508
Regulatory capital, Required	2,515,902	1,301,812
Leverage capital, Required	3,144,877	1,627,265
Risk-based capital, Actual	3,732,036	2,515,606
Regulatory capital, Actual	$ 3,732,036	$ 2,515,606
Capital-to-asset ratio, Actual	5.90%	7.70%
Leverage capital, Actual	$ 5,598,054	$ 3,773,409
Leverage capital-to-assets ratio, Actual	8.90%	11.60%

Mandatorily Redeemable Capital

Mandatorily Redeemable Capital Stock (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Mandatorily Redeemable Capital Stock [Roll Forward]
Balance at beginning of year	$ 13,562	$ 6,282	$ 5,806
Capital stock subject to mandatory redemption reclassified from capital	8,961	10,265	581
Redemption/repurchase of mandatorily redeemable capital stock	(12,233)	(2,985)	(105)
Balance at end of year	$ 10,290	$ 13,562	$ 6,282
Number of stockholders holding mandatorily redeemable capital stock	11	14	12

Mandatorily Redeemable Capita_2

Mandatorily Redeemable Capital Stock by Expiry of Redemption Notice Period (Details) - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Banking Regulation, Total Capital [Abstract]
Past redemption date	[1]	$ 2,980	$ 3,138
Due in one year or less		59	92
Due after one year through two years		0	30
Due after two years through three years		435	0
Due after three years through four years		689	581
Due after four years through five years		6,127	9,721
Total		$ 10,290	$ 13,562	$ 6,282	$ 5,806
Member withdrawal cancellation fee		2%
[1]Amount represents mandatorily redeemable capital stock that has reached the end of the five-year redemption-notice period but the member-related activity (for example, advances) remains outstanding. Accordingly, these shares of stock will not be redeemed until the activity is no longer outstanding.

Capital Narratives (Details)

Capital Narratives (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Common Stock, Class B, putable par value per share	$ 100
Contribution requirement - restricted retained earnings	$ 582,400,000
Restricted retained earnings	399,695,000	$ 368,420,000
Dividends on mandatorily redeemable capital stock	474,000	192,000	$ 221,000
Minimum repurchase of excess capital stock	100,000
Excess capital stock	$ 56,900,000	$ 32,600,000
Excess capital stock to total capital stock outstanding, percent	2.80%	3.40%
Excess capital stock to total assets, percent	0.10%
Certain member assets eligible to secure advances [Member]
Class B stock purchase requirement	0.05%
Overnight advances [Member]
Class B stock purchase requirement	3%
All other advances greater than overnight [Member]
Class B stock purchase requirement	4%
Outstanding letters of credit [Member]
Class B stock purchase requirement	0.25%
Unpaid principal balance of mortgage purchased through MPF program
Class B stock purchase requirement	4.50%
Common Class B [Member]
Common Stock, Class B, putable par value per share	$ 100	$ 100
Minimum [Member]
Class B Stock Purchase Requirement Amount	$ 10,000
Repurchase of excess capital stock held by shareholders, excess stock exceeds, amount	$ 3,000,000
Repurchase of excess capital stock held by shareholders, excess stock exceeds, percentage	3%
Maximum [Member]
Class B Stock Purchase Requirement Amount	$ 5,000,000

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) Before Tax1 [Roll Forward]
Beginning of period		$ 2,531,011	$ 2,781,953	$ 3,145,312
Noncredit losses included in basis of securities sold		0	0	39,144
Reclassification of realized net gains included in net income
Total other comprehensive income (loss)		(335,392)	12,828	203,111
Period end		3,415,321	2,531,011	2,781,953
Total [Member]
Accumulated Other Comprehensive Income (Loss) Before Tax1 [Roll Forward]
Beginning of period		28,967	16,139	(186,972)
Adjustment for transfer of securities from held-to-maturity to available-for-sale				47,564
Net Unrealized Gains (Losses)		(345,062)	1,570	135,824
Noncredit losses included in basis of securities sold				39,144
Accretion of noncredit loss				5,390
Net actuarial loss		4,310	4,059	(2,386)
Reclassification of realized net gains included in net income		2		(30,583)
Amortization - hedging activities	[1]	5,539	5,949	7,029
Amortization - pension and postretirement benefits	[2]	(181)	1,250	1,129
Total other comprehensive income (loss)		(335,392)	12,828	203,111
Period end		(306,425)	28,967	16,139
Net Unrealized Loss Relating to Hedging Activities
Accumulated Other Comprehensive Income (Loss) Before Tax1 [Roll Forward]
Beginning of period		(26,291)	(24,365)	(30,207)
Adjustment for transfer of securities from held-to-maturity to available-for-sale				0
Net Unrealized Gains (Losses)		63,234	(7,875)	(1,187)
Noncredit losses included in basis of securities sold				0
Accretion of noncredit loss				0
Net actuarial loss		0	0	0
Reclassification of realized net gains included in net income		0		0
Amortization - hedging activities	[1]	5,539	5,949	7,029
Amortization - pension and postretirement benefits	[2]	0	0	0
Total other comprehensive income (loss)		68,773	(1,926)	5,842
Period end		42,482	(26,291)	(24,365)
Pension and Postretirement Benefits [Member]
Accumulated Other Comprehensive Income (Loss) Before Tax1 [Roll Forward]
Beginning of period		(2,755)	(8,064)	(6,807)
Adjustment for transfer of securities from held-to-maturity to available-for-sale				0
Net Unrealized Gains (Losses)		0	0	0
Noncredit losses included in basis of securities sold				0
Accretion of noncredit loss				0
Net actuarial loss		4,310	4,059	(2,386)
Reclassification of realized net gains included in net income		0		0
Amortization - hedging activities	[1]	0	0	0
Amortization - pension and postretirement benefits	[2]	(181)	1,250	1,129
Total other comprehensive income (loss)		4,129	5,309	(1,257)
Period end		1,374	(2,755)	(8,064)
Available-for-sale Securities [Member] | Net Unrealized Loss on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) Before Tax1 [Roll Forward]
Beginning of period		58,013	48,568	(73,922)
Adjustment for transfer of securities from held-to-maturity to available-for-sale				16,062
Net Unrealized Gains (Losses)		(408,296)	9,445	137,011
Noncredit losses included in basis of securities sold				0
Accretion of noncredit loss				0
Net actuarial loss		0	0	0
Reclassification of realized net gains included in net income		2		(30,583)
Amortization - hedging activities	[1]	0	0	0
Amortization - pension and postretirement benefits	[2]	0	0	0
Total other comprehensive income (loss)		(408,294)	9,445	122,490
Period end		(350,281)	58,013	48,568
Held-to-maturity Securities [Member] | Total [Member]
Accumulated Other Comprehensive Income (Loss) Before Tax1 [Roll Forward]
Beginning of period		0	0	(76,036)
Adjustment for transfer of securities from held-to-maturity to available-for-sale				31,502
Net Unrealized Gains (Losses)		0	0	0
Noncredit losses included in basis of securities sold				39,144
Accretion of noncredit loss				5,390
Net actuarial loss		0	0	0
Reclassification of realized net gains included in net income		0		0
Amortization - hedging activities	[1]	0	0	0
Amortization - pension and postretirement benefits	[2]	0	0	0
Total other comprehensive income (loss)		0	0	76,036
Period end		$ 0	$ 0	$ 0
[1]Recorded in CO bond interest expense.[2]Recorded in other expenses in the statement of operations

Employee Retirement Plans - Net

Employee Retirement Plans - Net Pension Cost and Funded Status (Details) - Pentegra Defined Benefit Plan [Member] - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022		Dec. 31, 2021		Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Net pension cost		$ 704		$ 883		$ 6,843
Pentegra Defined Benefit Plan funded status as of July 1	[2]	118.90%	[1]	130.60%	[3]	108.50%
Our funded status as of July 1	[2]	119.20%		136.40%		110.20%
[1]The funded status as of July 1, 2022, is preliminary and may increase because the plan's participants were permitted to make contributions for the plan year ended June 30, 2022, through March 15, 2023. Contributions made on or before March 15, 2023, and designated for the plan year ended June 30, 2022, will be included in the final valuation as of July 1, 2022. The final funded status as of July 1, 2022, will not be available until the Form 5500 for the plan year July 1, 2022, through June 30, 2023 is filed. This Form 5500 is due to be filed no later than April 2024.[2]The funded status is calculated in accordance with a provision contained in the Highway and Transportation Funding Act of 2014 (HATFA), which was signed into law on August 8, 2014, and which modifies the interest rates that had been set by the Moving Ahead for Progress in the 21st Century Act (MAP-21). MAP-21, signed into law in 2012, changed the calculation of the discount rate used in measuring the pension plan liability. MAP-21 allows plan sponsors to measure the pension plan liability using a 25-year average of interest rates plus or minus a corridor. Prior to MAP-21, the discount rate used in measuring the pension plan liability was based on the 24-month average of interest rates. HATFA amended MAP-21 by extending the time period and reducing the rate at which the 25-year corridors widen. Over time, the pension funding stabilization effect of MAP-21 will decline because the 24-month smoothed segment rates and the amended 25-year corridors are likely to converge.[3]The funded status as of July 1, 2021, is preliminary and may increase because the plan's participants were permitted to make contributions for the plan year ended June 30, 2021, through March 15, 2022. Contributions made on or before March 15, 2022, and designated for the plan year ended June 30, 2021, will be included in the final valuation as of July 1, 2021. The final funded status as of July 1, 2021, will not be available until the Form 5500 for the plan year July 1, 2021, through June 30, 2022 is filed. This Form 5500 is due to be filed no later than April 2023.

Employee Retirement Plans - Non

Employee Retirement Plans - Nonqualified Supplemental Defined Benefit and Postretirement Benefits (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022		Dec. 31, 2021		Dec. 31, 2020
Supplemental Employee Retirement Plan, Defined Benefit [Member]
Change in benefit obligation [Roll Forward]
Benefit obligation at beginning of year	[1]	$ 19,828		$ 28,028
Service Cost		856	[1]	1,347	[1]	$ 1,487
Interest Cost		497	[1]	407	[1]	551
Actuarial gain	[1]	(3,726)		(3,960)
Benefits paid	[1]	(129)		(137)
Settlements	[1]	(3,346)		(5,857)
Benefit obligation at end of year	[1]	13,980		19,828		28,028
Change in plan assets [Roll Forward]
Fair value of plan assets at beginning of year		0		0
Employer contribution		3,475		5,994
Benefits paid		(129)		(137)
Settlements		(3,346)		(5,857)
Fair value of plan assets at end of year		0		0		0
Funded status at end of year		(13,980)		(19,828)
Other Postretirement Benefit Plan, Defined Benefit [Member]
Change in benefit obligation [Roll Forward]
Benefit obligation at beginning of year	[1]	1,658		1,690
Service Cost		34	[1]	45	[1]	44
Interest Cost		48	[1]	43	[1]	44
Actuarial gain	[1]	(584)		(99)
Benefits paid	[1]	(25)		(21)
Settlements	[1]	0		0
Benefit obligation at end of year	[1]	1,131		1,658		1,690
Change in plan assets [Roll Forward]
Fair value of plan assets at beginning of year		0		0
Employer contribution		25		21
Benefits paid		(25)		(21)
Settlements		0		0
Fair value of plan assets at end of year		0		0		$ 0
Funded status at end of year		$ (1,131)		$ (1,658)
[1]Represents the projected benefit obligation for the nonqualified supplemental defined benefit retirement plan and the accumulated postretirement benefit obligation for postretirement benefits.

Employee Retirement Plans - Amo

Employee Retirement Plans - Amounts Recognized in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Supplemental Employee Retirement Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (gain) loss	$ (1,288)	$ 2,218
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (gain) loss	$ (85)	$ 537

Employees Retirement Plans - Co

Employees Retirement Plans - Components of net periodic benefit cost and other amounts recognized in AOCL (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022		Dec. 31, 2021		Dec. 31, 2020
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Total amount recognized in other comprehensive income	$ (4,129)		$ (5,309)		$ 1,257
Supplemental Employee Retirement Plan, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	856	[1]	1,347	[1]	1,487
Interest Cost	497	[1]	407	[1]	551
Amortization of prior service cost	0		0		79
Amortization of net actuarial loss	290		543		1,020
Curtailment charge	0		0		69
Settlement (gain) loss	(510)		655		875
Net periodic benefit cost	1,133		2,952		4,081
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Amortization of prior service cost	0		0		(79)
Amortization of net actuarial loss	(290)		(543)		(1,020)
Net actuarial (gain) loss	(3,726)		(3,960)		3,048
Curtailment charge	0		0		(69)
Settlement gains (loss) recognized in earnings	510		(655)		(875)
Total amount recognized in other comprehensive income	(3,506)		(5,158)		1,005
Total amount recognized in net periodic benefit cost and other comprehensive income	(2,373)		(2,206)		5,086
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	34	[1]	45	[1]	44
Interest Cost	48	[1]	43	[1]	44
Amortization of prior service cost	0		0		0
Amortization of net actuarial loss	39		52		30
Curtailment charge	0		0		0
Settlement (gain) loss	0		0		0
Net periodic benefit cost	121		140		118
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Amortization of prior service cost	0		0		0
Amortization of net actuarial loss	(39)		(52)		(30)
Net actuarial (gain) loss	(584)		(99)		282
Curtailment charge	0		0		0
Settlement gains (loss) recognized in earnings	0		0		0
Total amount recognized in other comprehensive income	(623)		(151)		252
Total amount recognized in net periodic benefit cost and other comprehensive income	$ (502)		$ (11)		$ 370
[1]Represents the projected benefit obligation for the nonqualified supplemental defined benefit retirement plan and the accumulated postretirement benefit obligation for postretirement benefits.

Employee Retirement Plans - Key

Employee Retirement Plans - Key Assumptions used for actuarial calculations (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Salary increases	5.50%	5.50%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Salary increases	5.50%	5.50%
Supplemental Employee Retirement Plan, Defined Benefit [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	4.90%	2.32%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	2.32%	1.73%
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	5.03%	2.85%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	2.85%	2.55%

Employee Retirement Plans - Exp

Employee Retirement Plans - Expected future benefit payments (Details) $ in Thousands	Dec. 31, 2022 USD ($)
Supplemental Employee Retirement Plan, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2023	$ 1,591
2024	2,295
2025	4,532
2026	2,225
2027	210
2028-2032	1,495
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2023	27
2024	29
2025	31
2026	33
2027	36
2028-2032	$ 222

Employee Retirement Plans - Nar

Employee Retirement Plans - Narratives (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2020	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Employer Identification Number	04-6002575
Multiemployer Plans, Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Multiemployer Plan Number	333
Supplemental Employee Retirement Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	$ 13,700		$ 19,700
Pentegra Defined Benefit Plan, Voluntary Contribution [Member]
Defined Benefit Plan Disclosure [Line Items]
Voluntary employer contributions to Pentegra Defined Benefit Plan		$ 6,000
Thrift Benefit Equalization Plan [Member] | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Deferred Compensation Arrangement with Individual, Recorded Liability	$ 11,400		$ 13,500
Pentegra Defined Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer Identification Number	13-5645888

Fair Values Carrying Value and

Fair Values Carrying Value and Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks		$ 7,593	$ 204,993
Available-for-sale securities Fair Value		13,626,916	12,895,987
Held-to-Maturity Securities Carrying Value	[1]	99,068	145,492
Held-to-maturity fair value		98,591	148,068
Accrued interest receivable		134,268	68,360
Derivative assets		430,744	378,532
Derivative Assets, Netting Adjustments and Cash Collateral	[2],[3]	382,890	374,560
Mandatorily redeemable capital stock		(10,290)	(13,562)	$ (6,282)	$ (5,806)
Accrued interest payable		(130,515)	(60,968)
Derivative liabilities		(25,640)	(38,944)
Derivative liability, Netting Adjustments and Cash Collateral	[2],[3]	1,368,679	138,634
Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks		7,593	204,993
Interest-bearing deposits		1,485,290	85,153
Securities purchased under agreements to resell			0
Federal funds sold		0	0
Trading securities	[4]	0	0
Available-for-sale securities Fair Value	[4]	0	0
Held-to-maturity fair value		0	0
Advances		0	0
Mortgage loans, net		0	0
Accrued interest receivable		0	0
Derivative assets	[4]	0	0
Other assets	[4]	11,950	13,937
Deposits		0	0
Mandatorily redeemable capital stock		(10,290)	(13,562)
Accrued interest payable		0	0
Derivative liabilities	[4]	0	0
Level 1 [Member] | Commitments to make additional advances [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other		0	0
Level 1 [Member] | Standby Letters of Credit [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other		0	0
Level 1 [Member] | COs - Discount notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
CO Discount notes		0	0
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks		0	0
Interest-bearing deposits		0	0
Securities purchased under agreements to resell			799,998
Federal funds sold		2,705,992	1,943,998
Trading securities	[4]	1,507	501,867
Available-for-sale securities Fair Value	[4]	13,594,142	12,833,722
Held-to-maturity fair value		98,591	148,068
Advances		41,378,357	12,440,985
Mortgage loans, net		2,462,257	3,204,222
Accrued interest receivable		134,268	68,360
Derivative assets	[4]	47,854	3,972
Other assets	[4]	13,554	18,633
Deposits		(655,425)	(884,029)
Mandatorily redeemable capital stock		0	0
Accrued interest payable		(130,515)	(60,968)
Derivative liabilities	[4]	(1,394,319)	(177,578)
Level 2 [Member] | Commitments to make additional advances [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other		(13,327)	(6,196)
Level 2 [Member] | Standby Letters of Credit [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other		(1,168)	(1,146)
Level 2 [Member] | COs - Discount notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
CO Discount notes		(26,972,926)	(2,275,276)
Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks		0	0
Interest-bearing deposits		0	0
Securities purchased under agreements to resell			0
Federal funds sold		0	0
Trading securities	[4]	0	0
Available-for-sale securities Fair Value	[4]	32,774	62,265
Held-to-maturity fair value		0	0
Advances		0	0
Mortgage loans, net		21,014	30,607
Accrued interest receivable		0	0
Derivative assets	[4]	0	0
Other assets	[4]	0	0
Deposits		0	0
Mandatorily redeemable capital stock		0	0
Accrued interest payable		0	0
Derivative liabilities	[4]	0	0
Level 3 [Member] | Commitments to make additional advances [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other		0	0
Level 3 [Member] | Standby Letters of Credit [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other		0	0
Level 3 [Member] | COs - Discount notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
CO Discount notes		0	0
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks		7,593	204,993
Interest-bearing deposits		1,485,290	85,153
Securities purchased under agreements to resell			800,000
Federal funds sold		2,706,000	1,944,000
Trading securities	[4]	1,507	501,867
Available-for-sale securities Fair Value	[4]	13,626,916	12,895,987
Held-to-Maturity Securities Carrying Value		99,068	145,492
Advances		41,599,581	12,340,020
Mortgage loans, net		2,758,429	3,120,159
Accrued interest receivable		134,268	68,360
Derivative assets	[4]	430,744	378,532
Other assets	[4]	25,504	32,570
Deposits		(655,487)	(884,032)
Mandatorily redeemable capital stock		(10,290)	(13,562)
Accrued interest payable		(130,515)	(60,968)
Derivative liabilities	[4]	(25,640)	(38,944)
Carrying Value [Member] | Commitments to make additional advances [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other		0	0
Carrying Value [Member] | Standby Letters of Credit [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other		(1,168)	(1,146)
Carrying Value [Member] | COs - Discount notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
CO Discount notes		(26,975,260)	(2,275,320)
Total Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks		7,593	204,993
Interest-bearing deposits		1,485,290	85,153
Securities purchased under agreements to resell			799,998
Federal funds sold		2,705,992	1,943,998
Trading securities	[4]	1,507	501,867
Available-for-sale securities Fair Value	[4]	13,626,916	12,895,987
Held-to-maturity fair value		98,591	148,068
Advances		41,378,357	12,440,985
Mortgage loans, net		2,483,271	3,234,829
Accrued interest receivable		134,268	68,360
Derivative assets	[4]	430,744	378,532
Other assets	[4]	25,504	32,570
Deposits		(655,425)	(884,029)
Mandatorily redeemable capital stock		(10,290)	(13,562)
Accrued interest payable		(130,515)	(60,968)
Derivative liabilities	[4]	(25,640)	(38,944)
Total Fair Value [Member] | Commitments to make additional advances [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other		(13,327)	(6,196)
Total Fair Value [Member] | Standby Letters of Credit [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other		(1,168)	(1,146)
Total Fair Value [Member] | COs - Discount notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
CO Discount notes		(26,972,926)	(2,275,276)
COs - bonds [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
CO Bonds		0	0
COs - bonds [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
CO Bonds		(30,981,391)	(26,882,036)
COs - bonds [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
CO Bonds		0	0
COs - bonds [Member] | Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
CO Bonds		(31,565,543)	(26,613,032)
COs - bonds [Member] | Total Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
CO Bonds		$ (30,981,391)	$ (26,882,036)
[1]Fair values of held-to-maturity securities were $98,591 and $148,068 at December 31, 2022 and 2021, respectively.[2]Amounts represent the effect of master-netting agreements intended to allow us to settle positive and negative positions with the same counterparty. Cash collateral posted, including accrued interest, was $1.8 billion and $513.2 million at December 31, 2022, and 2021, respectively. The change in cash collateral posted is included in the net change in interest-bearing deposits in the statement of cash flows.[3]These amounts represent the effect of master-netting agreements intended to allow us to settle positive and negative positions and also cash collateral and related accrued interest held or placed with the same clearing member and/or counterparty.[4]Carried at fair value and measured on a recurring basis.

Fair Value of Assets and Liabil

Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis (Details) - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		$ 13,626,916	$ 12,895,987
Derivative assets		430,744	378,532
Derivative Assets, Netting Adjustments and Cash Collateral	[1],[2]	382,890	374,560
Derivative liabilities		(25,640)	(38,944)
Derivative liability, Netting Adjustments and Cash Collateral	[1],[2]	1,368,679	138,634
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	[3]	0	0
Available-for-sale securities Fair Value	[3]	0	0
Derivative assets	[3]	0	0
Other assets	[3]	11,950	13,937
Mortgage loans held for portfolio		0	0
Derivative liabilities	[3]	0	0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	[3]	1,507	501,867
Available-for-sale securities Fair Value	[3]	13,594,142	12,833,722
Derivative assets	[3]	47,854	3,972
Other assets	[3]	13,554	18,633
Mortgage loans held for portfolio		2,462,257	3,204,222
Derivative liabilities	[3]	(1,394,319)	(177,578)
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	[3]	0	0
Available-for-sale securities Fair Value	[3]	32,774	62,265
Derivative assets	[3]	0	0
Other assets	[3]	0	0
Mortgage loans held for portfolio		21,014	30,607
Derivative liabilities	[3]	0	0
Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Netting Adjustments and Cash Collateral	[4]	382,890	374,560
Derivative liability, Netting Adjustments and Cash Collateral	[4]	1,368,679	138,634
Recurring [Member] | Interest-rate swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Netting Adjustments and Cash Collateral	[4]	382,890	374,560
Derivative liability, Netting Adjustments and Cash Collateral	[4]	1,368,679	138,634
Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0	0
Available-for-sale securities Fair Value		0	0
Derivative assets		0	0
Other assets		11,950	13,937
Total assets carried at fair value		11,950	13,937
Total liabilities carried at fair value		0	0
Recurring [Member] | Level 1 [Member] | CO Bonds firm commitments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0	0
Derivative liabilities			0
Recurring [Member] | Level 1 [Member] | Interest-rate swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0	0
Derivative liabilities		0	0
Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		1,507	501,867
Available-for-sale securities Fair Value		13,594,142	12,833,722
Derivative assets		47,854	3,972
Other assets		13,554	18,633
Total assets carried at fair value		13,657,057	13,358,194
Total liabilities carried at fair value		(1,394,319)	(177,578)
Recurring [Member] | Level 2 [Member] | CO Bonds firm commitments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		50	54
Derivative liabilities			(30)
Recurring [Member] | Level 2 [Member] | Interest-rate swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		47,757	3,850
Derivative liabilities		(1,394,317)	(177,548)
Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0	0
Available-for-sale securities Fair Value		32,774	62,265
Derivative assets		0	0
Other assets		0	0
Total assets carried at fair value		32,774	62,265
Total liabilities carried at fair value		0	0
Recurring [Member] | Level 3 [Member] | CO Bonds firm commitments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0	0
Derivative liabilities			0
Recurring [Member] | Level 3 [Member] | Interest-rate swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0	0
Derivative liabilities		0	0
Nonrecurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets carried at fair value	[5]	0	0
Mortgage loans held for portfolio	[5]	0	0
REO	[5]		0
Nonrecurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets carried at fair value	[5]	0	0
Mortgage loans held for portfolio	[5]	0	0
REO	[5]		0
Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets carried at fair value	[5]	90	3,919
Mortgage loans held for portfolio	[5]	90	3,860
REO	[5]		59
Estimate of Fair Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	[3]	1,507	501,867
Available-for-sale securities Fair Value	[3]	13,626,916	12,895,987
Derivative assets	[3]	430,744	378,532
Other assets	[3]	25,504	32,570
Mortgage loans held for portfolio		2,483,271	3,234,829
Derivative liabilities	[3]	(25,640)	(38,944)
Estimate of Fair Value Measurement [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		1,507	501,867
Available-for-sale securities Fair Value		13,626,916	12,895,987
Derivative assets		430,744	378,532
Other assets		25,504	32,570
Total assets carried at fair value		14,084,671	13,808,956
Total liabilities carried at fair value		(25,640)	(38,944)
Estimate of Fair Value Measurement [Member] | Recurring [Member] | CO Bonds firm commitments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		50	54
Derivative liabilities			(30)
Estimate of Fair Value Measurement [Member] | Recurring [Member] | Interest-rate swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		430,647	378,410
Derivative liabilities		(25,638)	(38,914)
Estimate of Fair Value Measurement [Member] | Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets carried at fair value	[5]	90	3,919
Mortgage loans held for portfolio	[5]	90	3,860
REO	[5]		59
Corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		1,507	1,442
Corporate bonds [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0	0
Corporate bonds [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		1,507	1,442
Corporate bonds [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0	0
Corporate bonds [Member] | Estimate of Fair Value Measurement [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		1,507	1,442
US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0	500,425
Available-for-sale securities Fair Value		5,723,562	5,084,546
US Treasury Securities [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities			0
Available-for-sale securities Fair Value		0	0
US Treasury Securities [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities			500,425
Available-for-sale securities Fair Value		5,723,562	5,084,546
US Treasury Securities [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities			0
Available-for-sale securities Fair Value		0	0
US Treasury Securities [Member] | Estimate of Fair Value Measurement [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities			500,425
Available-for-sale securities Fair Value		5,723,562	5,084,546
U.S. government guaranteed - single-family MBS [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		16,148	21,535
U.S. government guaranteed - single-family MBS [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		0	0
U.S. government guaranteed - single-family MBS [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		16,148	21,535
U.S. government guaranteed - single-family MBS [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		0	0
U.S. government guaranteed - single-family MBS [Member] | Estimate of Fair Value Measurement [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		16,148	21,535
U.S. government guaranteed-multifamily MBS [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		476,730	541,405
U.S. government guaranteed-multifamily MBS [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		0	0
U.S. government guaranteed-multifamily MBS [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		476,730	541,405
U.S. government guaranteed-multifamily MBS [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		0	0
U.S. government guaranteed-multifamily MBS [Member] | Estimate of Fair Value Measurement [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		476,730	541,405
Mortgage Receivable [Member] | Recurring [Member] | Level 1 [Member] | Mortgage-delivery commitments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0	0
Derivative liabilities		0
Mortgage Receivable [Member] | Recurring [Member] | Level 2 [Member] | Mortgage-delivery commitments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		47	68
Derivative liabilities		(2)
Mortgage Receivable [Member] | Recurring [Member] | Level 3 [Member] | Mortgage-delivery commitments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0	0
Derivative liabilities		0
Mortgage Receivable [Member] | Estimate of Fair Value Measurement [Member] | Recurring [Member] | Mortgage-delivery commitments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		47	68
Derivative liabilities		(2)
HFA securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		32,774	62,265
HFA securities [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		0	0
HFA securities [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		0	0
HFA securities [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		32,774	62,265
HFA securities [Member] | Estimate of Fair Value Measurement [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		32,774	62,265
Supranational institutions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		350,352	403,765
Supranational institutions [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		0	0
Supranational institutions [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		350,352	403,765
Supranational institutions [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		0	0
Supranational institutions [Member] | Estimate of Fair Value Measurement [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		350,352	403,765
U.S. government-owned corporations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		227,200	306,864
U.S. government-owned corporations [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		0	0
U.S. government-owned corporations [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		227,200	306,864
U.S. government-owned corporations [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		0	0
U.S. government-owned corporations [Member] | Estimate of Fair Value Measurement [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		227,200	306,864
GSE [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		97,666	126,472
GSE [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		0	0
GSE [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		97,666	126,472
GSE [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		0	0
GSE [Member] | Estimate of Fair Value Measurement [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		97,666	126,472
Single Family [Member] | Government Sponsored Enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		765,526	1,103,714
Single Family [Member] | Government Sponsored Enterprises [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		0	0
Single Family [Member] | Government Sponsored Enterprises [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		765,526	1,103,714
Single Family [Member] | Government Sponsored Enterprises [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		0	0
Single Family [Member] | Government Sponsored Enterprises [Member] | Estimate of Fair Value Measurement [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		765,526	1,103,714
Multifamily [Member] | Government Sponsored Enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		5,936,958	5,245,421
Multifamily [Member] | Government Sponsored Enterprises [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		0	0
Multifamily [Member] | Government Sponsored Enterprises [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		5,936,958	5,245,421
Multifamily [Member] | Government Sponsored Enterprises [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		0	0
Multifamily [Member] | Government Sponsored Enterprises [Member] | Estimate of Fair Value Measurement [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		$ 5,936,958	$ 5,245,421
[1]Amounts represent the effect of master-netting agreements intended to allow us to settle positive and negative positions with the same counterparty. Cash collateral posted, including accrued interest, was $1.8 billion and $513.2 million at December 31, 2022, and 2021, respectively. The change in cash collateral posted is included in the net change in interest-bearing deposits in the statement of cash flows.[2]These amounts represent the effect of master-netting agreements intended to allow us to settle positive and negative positions and also cash collateral and related accrued interest held or placed with the same clearing member and/or counterparty.[3]Carried at fair value and measured on a recurring basis.[4]These amounts represent the effect of master-netting agreements intended to allow us to settle positive and negative positions and also cash collateral and related accrued interest held or placed with the same clearing member and/or counterparty.[5]We measure certain mortgage loans held for portfolio and REO at fair value on a nonrecurring basis, that is, they are not measured at fair value on an ongoing basis but are subject to fair-value adjustments only in certain circumstances. The fair values presented are as of the date the fair value adjustment was recorded.

Estimated Fair Value Level 3 Re

Estimated Fair Value Level 3 Reconciliation - Roll Forward (Details) - Level 3 [Member] - Recurring [Member] - Available-for-sale Securities [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
HFA securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of year	$ 62,265	$ 122,549	$ 64,652
Transfer of securities from held-to-maturity to available-for-sale	0	0	71,240
Net gains on sale	0	0	0
Reduction of provision for credit losses	0	0	0
Accretion	0	0	0
Net unrealized (losses) gains	(741)	3,316	6,517
Sales	0	0	0
Maturities	(27,000)	(61,320)	(18,685)
Settlements	(1,750)	(2,280)	(1,175)
Balance at end of year	32,774	62,265	122,549
Total amount of unrealized (losses) gains for the period included in other comprehensive income relating to securities held at period end	$ (960)	124	5,823
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Residential Mortgage Backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of year		$ 0	0
Transfer of securities from held-to-maturity to available-for-sale			180,514
Net gains on sale			30,583
Reduction of provision for credit losses			269
Accretion			353
Net unrealized (losses) gains			(22,203)
Sales			(187,366)
Maturities			0
Settlements			(2,150)
Balance at end of year			0
Total amount of unrealized (losses) gains for the period included in other comprehensive income relating to securities held at period end			$ 0

Off-Balance Sheet Commitments (

Off-Balance Sheet Commitments (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021
Loss Contingencies [Line Items]
Value of the guarantees related to standby letters of credit		$ 42,871	$ 57,920
Maximum term of commitments to invest in mortgage loans		60 days
Other FHLBanks [Member]
Loss Contingencies [Line Items]
Par value of other FHLBanks' outstanding COs for which we are jointly and severally liable		$ 1,100,000,000	623,900,000
Maximum [Member]
Loss Contingencies [Line Items]
Standby letters of credit, current terms		10 years
Standby letters of credit [Member]
Loss Contingencies [Line Items]
Off-balance-sheet Commitments Expiring Within One Year	[1],[2]	$ 10,148,761	5,369,701
Off-balance-sheet Commitments Expiring After One Year	[1],[2]	77,521	132,096
Total Off-balance Sheet Commitments	[1],[2]	10,226,282	5,501,797
Value of the guarantees related to standby letters of credit		1,200	1,100
Commitments of unused lines of credit - advances [Member]
Loss Contingencies [Line Items]
Off-balance-sheet Commitments Expiring Within One Year	[2],[3]	1,123,269	1,095,844
Off-balance-sheet Commitments Expiring After One Year	[2],[3]	0	0
Total Off-balance Sheet Commitments	[2],[3]	$ 1,123,269	1,095,844
Commitments of unused lines of credit - advances [Member] | Maximum [Member]
Loss Contingencies [Line Items]
Period for commitments for unused line-of-credit advances		12 months
Commitments to make additional advances [Member]
Loss Contingencies [Line Items]
Off-balance-sheet Commitments Expiring Within One Year	[2]	$ 57,024	40,917
Off-balance-sheet Commitments Expiring After One Year	[2]	29,010	66,318
Total Off-balance Sheet Commitments	[2]	86,034	107,235
Unsettled CO bonds, at par [Member]
Loss Contingencies [Line Items]
Off-balance-sheet Commitments Expiring Within One Year		172,140	260,000
Off-balance-sheet Commitments Expiring After One Year		0	0
Total Off-balance Sheet Commitments		172,140	260,000
Unsettled CO discount notes, at par [Member]
Loss Contingencies [Line Items]
Off-balance-sheet Commitments Expiring Within One Year	[2]	32,480	0
Off-balance-sheet Commitments Expiring After One Year	[2]	0	0
Total Off-balance Sheet Commitments	[2]	32,480	0
Standby Letters of Credit Issuance Commitments [Member]
Loss Contingencies [Line Items]
Off-balance-sheet Commitments Expiring Within One Year		22,000	16,100
Off-balance-sheet Commitments Expiring After One Year			125
Mortgage Receivable [Member] | Commitments to invest in mortgage loans [Member]
Loss Contingencies [Line Items]
Off-balance-sheet Commitments Expiring Within One Year	[2]	3,454	3,164
Off-balance-sheet Commitments Expiring After One Year	[2]	0	0
Total Off-balance Sheet Commitments	[2]	$ 3,454	$ 3,164
[1]The amount of standby letters of credit outstanding excludes commitments to issue standby letters of credit that expire within one year. At December 31, 2022 and 2021, these amounts totaled $22.0 million and $16.1 million, respectively. Also excluded are commitments to issue standby letters of credit that expire after one year totaling $125 thousand at December 31, 2021.[2]We have determined that it is unnecessary to record any liability for credit losses on these agreements.[3]Commitments for unused line-of-credit advances are generally for periods of up to 12 months. Since many of these commitments are not expected to be drawn upon, the total commitment amount does not necessarily indicate future liquidity requirements.

Transactions with Shareholder_2

Transactions with Shareholders (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Transactions with Shareholders [Line Items]
Capital Stock Outstanding	$ 2,031,178	$ 953,638
Par Value of Advances	41,830,776	12,347,705
Total Accrued Interest Receivable	134,268	68,360
Citizens Bank N.A.
Transactions with Shareholders [Line Items]
Capital Stock Outstanding	$ 363,769
Percent of Total Capital Stock	17.80%
Par Value of Advances	$ 8,519,007
Percentage of Total Par Value of Advances	20.40%
Total Accrued Interest Receivable	$ 5,662
Percent of Total Accrued Interest Receivable on Advances	7.80%
Webster Bank N.A.
Transactions with Shareholders [Line Items]
Capital Stock Outstanding	$ 221,408
Percent of Total Capital Stock	10.80%
Par Value of Advances	$ 5,460,552
Percentage of Total Par Value of Advances	13.10%
Total Accrued Interest Receivable	$ 9,942
Percent of Total Accrued Interest Receivable on Advances	13.60%
Directors' Financial Institutions [Member]
Transactions with Shareholders [Line Items]
Capital Stock Outstanding	$ 374,123	$ 48,104
Percent of Total Capital Stock	18.30%	5%
Par Value of Advances	$ 8,683,521	$ 416,542
Percentage of Total Par Value of Advances	20.80%	3.40%
Total Accrued Interest Receivable	$ 5,803	$ 466
Percent of Total Accrued Interest Receivable on Advances	8%	2.80%
Minimum [Member]
Transactions with Shareholders [Line Items]
Definition of related party, minimum percent	10%
Definition of shareholder concentration, minimum percent	10%

Transactions with Other FHLBa_2

Transactions with Other FHLBanks (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Transactions with Other FHLBanks [Line Items]
Bonds transferred to other FHLBanks - par amount	$ 0	$ 171,200	$ 985,100
Bonds transferred to other FHLBanks at fair value	0	173,984	1,005,990
FHLBanks [Member]
Transactions with Other FHLBanks [Line Items]
Interest Income on loans to other FHLBanks	194	0	48
Interest expense for loans from other FHLBanks	307	0	218
Federal Home Loan Bank of Chicago [Member]
Transactions with Other FHLBanks [Line Items]
MPF transaction-services fee expense	2,000	2,400	2,900
MPF membership fee expense	600	600	600
Performance Fee	$ 225	$ 125	$ 50

Subsequent Events (Details)

Subsequent Events (Details) - Common Class B [Member] - Subsequent Event [Member] - USD ($) $ in Millions	Mar. 02, 2023	Feb. 24, 2023
Subsequent Event [Line Items]
Annualized rate of cash dividend		6.67%
Dividend, including dividends on mandatorily redeemable capital stock	$ 31.2