Federal Home Loan Bank of Boston 10-Q 12 Nov 24 2024 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares shares in Thousands	9 Months Ended
	Sep. 30, 2024	Oct. 31, 2024
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2024
Document Transition Report	false
Entity File Number	000-51402
Entity Registrant Name	FEDERAL HOME LOAN BANK OF BOSTON
Entity Incorporation, State or Country Code	X1
Entity Tax Identification Number	04-6002575
Entity Address, Address Line One	800 Boylston Street,
Entity Address, City or Town	Boston
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	02199
City Area Code	(617)
Local Phone Number	292-9600
Entity Current Reporting Status	Yes
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		21,181
Amendment Flag	false
Entity Central Index Key	0001331463
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3

Statements of Condition (unaudi

Statements of Condition (unaudited) - USD ($) shares in Thousands, $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Available-for-sale securities - amortized cost	[1]	$ 17,203,037	$ 15,684,997
Allowance for credit loss		$ 2,200	$ 2,000
Common Stock, Class B, putable shares issued		21,615	20,425
Common Stock, Class B, putable shares outstanding		21,615	20,425
ASSETS
Cash and due from banks		$ 50,242	$ 53,412
Interest-bearing deposits		1,809,628	1,643,587
Securities purchased under agreements to resell		2,750,000	1,600,000
Federal funds sold		4,585,000	2,500,000
Investment securities:
Trading securities		1,496	1,395
Available-for-sale securities (amortized cost of $17,203,037 and $15,684,997 at September 30, 2024 and December 31, 2023, respectively)		16,925,261	15,343,745
Held-to-maturity securities	[2]	66,439	78,905
Total investment securities		16,993,196	15,424,045
Advances	[3]	42,006,806	41,958,583
Mortgage loans held for portfolio, net of allowance for credit losses of $2,200 and $2,000 at September 30, 2024 and December 31, 2023, respectively		3,543,560	3,059,331
Accrued interest receivable		223,195	185,709
Derivative assets, net		355,423	383,073
Other assets		79,791	334,534
Total Assets		72,396,841	67,142,274
Deposits
Interest-bearing		728,197	896,005
Non-interest-bearing		37,634	26,874
Total deposits		765,831	922,879
Consolidated obligations (COs):
Bonds		52,338,590	40,248,743
Discount notes		14,941,067	22,000,546
Total consolidated obligations		67,279,657	62,249,289
Mandatorily redeemable capital stock		5,086	6,083
Accrued interest payable		361,110	269,517
Affordable Housing Program (AHP) payable		97,381	87,164
Derivative liabilities, net		6,844	3,017
Other liabilities		73,574	65,711
Total liabilities		68,589,483	63,603,660
Commitments and contingencies (Note 12)
Capital
Capital stock – Class B – putable ($100 par value), 21,615 shares and 20,425 shares issued and outstanding at September 30, 2024 and December 31, 2023, respectively		2,161,471	2,042,453
Retained earnings:
Unrestricted		1,380,713	1,339,546
Restricted		492,833	451,154
Total retained earnings		1,873,546	1,790,700
Accumulated other comprehensive loss		(227,659)	(294,539)
Total capital		3,807,358	3,538,614
Total Liabilities and Capital		$ 72,396,841	$ 67,142,274
Common Class B [Member]
Common Stock, Class B, putable par value per share		$ 100	$ 100
[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 December 31, 2023 , respectively. accrued interest receivable

Statements of Condition (Parent

Statements of Condition (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Held-to-maturity fair value	$ 66,475	$ 78,478

Statements of Operations (unaud

Statements of Operations (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
INTEREST INCOME
Advances	$ 535,200	$ 486,508	$ 1,615,872	$ 1,587,597
Prepayment fees on advances, net	320	336	427	784
Interest-bearing deposits	34,893	38,562	108,505	106,064
Securities purchased under agreements to resell	18,108	28,450	50,291	86,655
Federal funds sold	53,249	57,936	156,389	148,781
Investment securities:
Trading securities	18	18	55	53
Available-for-sale securities	234,545	214,392	707,504	590,767
Held-to-maturity securities	970	1,123	3,183	3,311
Total investment securities	235,533	215,533	710,742	594,131
Mortgage loans held for portfolio	34,570	24,004	94,281	66,904
Other	0	174	0	605
Total interest income	911,873	851,503	2,736,507	2,591,521
Consolidated obligations:
Bonds	567,157	477,389	1,609,188	1,349,479
Discount notes	245,922	258,516	791,065	920,041
Total consolidated obligations	813,079	735,905	2,400,253	2,269,520
Deposits	8,805	11,348	27,909	25,785
Mandatorily redeemable capital stock	107	120	340	416
Other borrowings	95	1	121	123
Total interest expense	822,086	747,374	2,428,623	2,295,844
NET INTEREST INCOME	89,787	104,129	307,884	295,677
(Reduction of) provision for credit losses	(4)	(8)	196	85
NET INTEREST INCOME AFTER (REDUCTION OF) PROVISION FOR CREDIT LOSSES	89,791	104,137	307,688	295,592
OTHER INCOME (LOSS)
Service fees	3,269	3,418	9,326	10,626
Other, net	2,214	(1,351)	1,977	(555)
Total other income	5,483	2,067	11,303	10,071
OTHER EXPENSE
Compensation and benefits	11,894	11,102	36,529	33,060
Other operating expenses	7,758	7,577	22,119	21,454
Federal Housing Finance Agency (the FHFA)	1,189	1,653	3,568	4,958
Office of Finance	1,177	1,112	3,384	3,180
AHP voluntary contribution	507	0	1,852	2,000
Discretionary housing and community investment programs	4,567	6,105	16,673	9,357
Other	1,093	790	3,278	2,917
Total other expense	28,185	28,339	87,403	76,926
INCOME BEFORE ASSESSMENTS	67,089	77,865	231,588	228,737
AHP assessments	6,720	7,798	23,193	22,915
NET INCOME	$ 60,369	$ 70,067	$ 208,395	$ 205,822

Statements of Comprehensive Inc

Statements of Comprehensive Income (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 60,369	$ 70,067	$ 208,395	$ 205,822
Other comprehensive income:
Net unrealized gains (losses) on available-for-sale securities	61,005	(58,738)	63,476	(48,534)
Net unrealized (losses) gains relating to hedging activities	(20,081)	24,080	3,631	28,871
Pension and postretirement benefits	(76)	(122)	(227)	(377)
Total other comprehensive income (loss)	40,848	(34,780)	66,880	(20,040)
Comprehensive income	$ 101,217	$ 35,287	$ 275,275	$ 185,782

Statements of Capital (unaudite

Statements of Capital (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning of period	$ 3,681,966	$ 3,469,852	$ 3,538,614	$ 3,415,321
Comprehensive income (loss)	101,217	35,287	275,275	185,782
Proceeds from issuance of capital stock	824,902	1,366,171	2,227,360	4,128,863
Repurchase of capital stock	(757,707)	(1,363,343)	(2,108,342)	(4,150,886)
Stock reclassified to mandatorily redeemable capital stock		(1,815)		(2,096)
Cash dividends on capital stock	(43,020)	(46,363)	(125,549)	(117,195)
Period end	3,807,358	3,459,789	3,807,358	3,459,789
Retained Earnings, Unrestricted
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning of period	1,375,438	1,328,645	1,339,546	1,290,873
Comprehensive income (loss)	48,295	56,053	166,716	164,657
Cash dividends on capital stock	(43,020)	(46,363)	(125,549)	(117,195)
Period end	1,380,713	1,338,335	1,380,713	1,338,335
Retained Earnings, Restricted
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning of period	480,759	426,846	451,154	399,695
Comprehensive income (loss)	12,074	14,014	41,679	41,165
Period end	492,833	440,860	492,833	440,860
Retained Earnings, Total
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning of period	1,856,197	1,755,491	1,790,700	1,690,568
Comprehensive income (loss)	60,369	70,067	208,395	205,822
Cash dividends on capital stock	(43,020)	(46,363)	(125,549)	(117,195)
Period end	1,873,546	1,779,195	1,873,546	1,779,195
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning of period	(268,507)	(291,685)	(294,539)	(306,425)
Comprehensive income (loss)	40,848	(34,780)	66,880	(20,040)
Period end	$ (227,659)	$ (326,465)	$ (227,659)	$ (326,465)
Common Class B [Member] | Capital Stock Class B - Putable
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning of period, shares	20,943	20,060	20,425	20,312
Beginning of period	$ 2,094,276	$ 2,006,046	$ 2,042,453	$ 2,031,178
Proceeds from issuance of capital stock, shares	8,249	13,662	22,273	41,289
Proceeds from issuance of capital stock	$ 824,902	$ 1,366,171	$ 2,227,360	$ 4,128,863
Repurchase of capital stock, shares	(7,577)	(13,633)	(21,083)	(41,509)
Repurchase of capital stock	$ (757,707)	$ (1,363,343)	$ (2,108,342)	$ (4,150,886)
Stock reclassified to mandatorily redeemable capital stock, shares		(18)		(21)
Stock reclassified to mandatorily redeemable capital stock		$ (1,815)		$ (2,096)
Period end, shares	21,615	20,071	21,615	20,071
Period end	$ 2,161,471	$ 2,007,059	$ 2,161,471	$ 2,007,059

Statements of Cash Flows (unaud

Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
OPERATING ACTIVITIES
Net Income			$ 208,395	$ 205,822
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization			(453)	19,589
Provision for credit losses	$ (4)	$ (8)	196	85
Net change in derivatives and hedging activities			(332,788)	123,290
Other adjustments, net			4,023	5,969
Net change in:
Market value of trading securities			(100)	(37)
Accrued interest receivable			(37,486)	(28,469)
Other assets			5,724	2,392
Accrued interest payable			91,599	140,876
Other liabilities			17,009	12,025
Total adjustments			(252,276)	275,720
Net cash (used in) provided by operating activities			(43,881)	481,542
INVESTING ACTIVITIES
Interest-bearing deposits			196,119	(58,730)
Securities purchased under agreements to resell			(1,150,000)	(500,000)
Federal funds sold			(2,085,000)	266,000
Advances to members			79,358	1,415,643
Available-for-sale securities:
Proceeds			644,808	271,641
Purchases			(1,626,434)	(820,961)
Held-to-maturity securities:
Proceeds			12,179	15,898
Mortgage loans held for portfolio:
Proceeds			209,719	177,549
Purchases			(697,647)	(364,048)
Other investing activities, net			(1,458)	(7,832)
Net cash (used in) provided by investing activities			(4,418,356)	395,160
FINANCING ACTIVITIES
Net change in deposits			(156,435)	506,842
Net payments on derivatives with a financing element			(2,389)	36,070
Net proceeds from issuance of consolidated obligations:
Discount notes			73,404,472	109,089,082
Discount notes transferred from other FHLBanks			614,234	0
Bonds			28,278,786	25,246,360
Bonds transferred from other FHLBanks			5,804,945	0
Payments for maturing and retiring consolidated obligations:
Discount notes			(80,481,393)	(115,783,630)
Discount notes transferred to other FHLBanks			(612,816)	0
Bonds			(22,382,775)	(19,514,435)
Payment of financing lease			(34)	(162)
Proceeds from issuance of capital stock			2,227,360	4,128,863
Payments for repurchase of capital stock			(2,108,342)	(4,150,886)
Payments for redemption of mandatorily redeemable capital stock			(997)	(6,243)
Cash dividends paid			(125,549)	(117,195)
Net cash provided by (used in) financing activities			4,459,067	(565,334)
Net (decrease) increase in cash and due from banks			(3,170)	311,368
Cash and due from banks at beginning of the period			53,412	7,593	$ 7,593
Cash and due from banks at end of the period	$ 50,242	$ 318,961	50,242	318,961	53,412
Supplemental disclosures:
Interest paid			2,322,900	2,166,889
AHP payments			14,132	13,442	$ 16,144
Noncash transfers of mortgage loans held for portfolio to other assets			265	392
Noncash lease liabilities arising from obtaining right-of-use assets			$ 0	$ 26,314

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2024
Accounting Policies [Abstract]
Basis of Accounting [Text Block]	Basis of Presentation The accompanying unaudited financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP) for interim financial information. In the opinion of management, all adjustments considered necessary have been included. All such adjustments consist of normal recurring accruals. The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. The results of operations for interim periods are not necessarily indicative of the results to be expected for the year ending December 31, 2024. These interim financial statements do not include all the information and footnotes required by GAAP for complete annual financial statements and accordingly should be read in conjunction with the Federal Home Loan Bank of Boston's audited financial statements and related notes in our Annual Report on Form 10-K for the year ended December 31, 2023, filed with the Securities and Exchange Commission (the SEC) on March 15, 2024 (the 2023 Annual Report). Unless otherwise indicated or the context requires otherwise, all references in this discussion to “the Bank,” "we," "us," "our," or similar references mean the Federal Home Loan Bank of Boston.

Investments

Investments	9 Months Ended
	Sep. 30, 2024
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 September 30, 2024, and December 31, 2023, none of these investments were made to counterparties or, if applicable, guaranteed by entities rated below single-A or the equivalent. 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 September 30, 2024, and December 31, 2023. Federal funds sold are unsecured loans that are transacted on an overnight term or short-term basis. Federal Housing Finance Agency (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 September 30, 2024, and December 31, 2023, have been repaid according to the contractual terms. No allowance for credit losses was recorded for these assets at September 30, 2024, and December 31, 2023. 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. We are not required to divest instruments that experience credit deterioration after their purchase. Trading Securities Table 2.1 - Trading Securities by Major Security Type (dollars in thousands) September 30, 2024 December 31, 2023 Corporate bonds $ 1,496 $ 1,395 For the nine months ended September 30, 2024 and 2023, net gains on trading securities held at period end were $100 thousand and $37 thousand, respectively. We do not participate in speculative trading practices and typically hold these investments for longer periods of time. Available-for-sale Securities Table 2.2 - Available-for-Sale Securities by Major Security Type (dollars in thousands) September 30, 2024 Amounts Recorded in Accumulated Other Comprehensive Income Amortized Cost (1) Unrealized Unrealized Fair U.S. Treasury obligations $ 5,856,446 $ 363 $ (12,677) $ 5,844,132 State housing-finance-agency obligations (HFA securities) 21,460 9 (78) 21,391 Supranational institutions 347,068 17 (3,419) 343,666 U.S. government-owned corporations 253,228 — (15,594) 237,634 GSE 104,044 — (3,828) 100,216 6,582,246 389 (35,596) 6,547,039 Mortgage-backed securities (MBS) U.S. government guaranteed – single-family 207,989 372 (1,918) 206,443 U.S. government guaranteed – multifamily 512,346 — (40,852) 471,494 GSE – single-family 2,117,517 5,726 (38,789) 2,084,454 GSE – multifamily 7,782,939 8,050 (175,158) 7,615,831 10,620,791 14,148 (256,717) 10,378,222 Total $ 17,203,037 $ 14,537 $ (292,313) $ 16,925,261 December 31, 2023 Amounts Recorded in Accumulated Other Comprehensive Income Amortized Cost (1) Unrealized Unrealized Fair U.S. Treasury obligations $ 5,684,157 $ 122 $ (19,827) $ 5,664,452 HFA securities 22,430 — (625) 21,805 Supranational institutions 350,282 3 (3,910) 346,375 U.S. government-owned corporations 252,585 — (17,394) 235,191 GSE 104,015 — (4,594) 99,421 6,413,469 125 (46,350) 6,367,244 MBS U.S. government guaranteed – single-family 16,854 — (2,421) 14,433 U.S. government guaranteed – multifamily 521,203 — (43,527) 477,676 GSE – single-family 954,298 1,665 (51,507) 904,456 GSE – multifamily 7,779,173 3,517 (202,754) 7,579,936 9,271,528 5,182 (300,209) 8,976,501 Total $ 15,684,997 $ 5,307 $ (346,559) $ 15,343,745 _______________________ (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 2.3 - Available-for-Sale Securities in a Continuous Unrealized Loss Position (dollars in thousands) September 30, 2024 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 $ 1,189,830 $ (815) $ 3,193,324 $ (11,862) $ 4,383,154 $ (12,677) HFA securities — — 13,742 (78) 13,742 (78) Supranational institutions — — 331,252 (3,419) 331,252 (3,419) U.S. government-owned corporations — — 237,634 (15,594) 237,634 (15,594) GSE — — 100,216 (3,828) 100,216 (3,828) 1,189,830 (815) 3,876,168 (34,781) 5,065,998 (35,596) MBS U.S. government guaranteed – single-family — — 13,527 (1,918) 13,527 (1,918) U.S. government guaranteed – multifamily — — 471,494 (40,852) 471,494 (40,852) GSE – single-family 177,641 (88) 540,481 (38,701) 718,122 (38,789) GSE – multifamily 313,431 (1,172) 5,302,715 (173,986) 5,616,146 (175,158) 491,072 (1,260) 6,328,217 (255,457) 6,819,289 (256,717) Total $ 1,680,902 $ (2,075) $ 10,204,385 $ (290,238) $ 11,885,287 $ (292,313) December 31, 2023 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 $ 1,865,124 $ (1,405) $ 3,319,996 $ (18,422) $ 5,185,120 $ (19,827) HFA securities — — 21,805 (625) 21,805 (625) Supranational institutions 82,354 (188) 251,452 (3,722) 333,806 (3,910) U.S. government-owned corporations — — 235,191 (17,394) 235,191 (17,394) GSE — — 99,421 (4,594) 99,421 (4,594) 1,947,478 (1,593) 3,927,865 (44,757) 5,875,343 (46,350) MBS U.S. government guaranteed – single-family — — 14,433 (2,421) 14,433 (2,421) U.S. government guaranteed – multifamily — — 477,676 (43,527) 477,676 (43,527) GSE – single-family 55,457 (117) 616,857 (51,390) 672,314 (51,507) GSE – multifamily 1,238,598 (2,993) 5,299,421 (199,761) 6,538,019 (202,754) 1,294,055 (3,110) 6,408,387 (297,099) 7,702,442 (300,209) Total $ 3,241,533 $ (4,703) $ 10,336,252 $ (341,856) $ 13,577,785 $ (346,559) Table 2.4 - Available-for-Sale Securities by Contractual Maturity (dollars in thousands) September 30, 2024 December 31, 2023 Year of Maturity Amortized Fair Amortized Fair Due in one year or less $ 1,246,798 $ 1,247,046 $ 13,820 $ 13,210 Due after one year through five years 5,017,493 5,001,325 6,082,462 6,058,571 Due after five years through 10 years — — — — Due after 10 years 317,955 298,668 317,187 295,463 6,582,246 6,547,039 6,413,469 6,367,244 MBS (1) 10,620,791 10,378,222 9,271,528 8,976,501 Total $ 17,203,037 $ 16,925,261 $ 15,684,997 $ 15,343,745 _______________________ (1) MBS are not presented by contractual maturity because their expected maturities will likely differ from contractual maturities since 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 2.5 - Held-to-Maturity Securities by Major Security Type (dollars in thousands) September 30, 2024 Amortized Cost (1) Gross Unrecognized Holding Gains Gross Unrecognized Holding Losses Fair Value MBS U.S. government guaranteed – single-family $ 2,861 $ 16 $ — $ 2,877 GSE – single-family 63,578 561 (541) 63,598 Total $ 66,439 $ 577 $ (541) $ 66,475 December 31, 2023 Amortized Cost (1) Gross Unrecognized Holding Gains Gross Unrecognized Holding Losses Fair Value MBS U.S. government guaranteed – single-family $ 3,123 $ 19 $ — $ 3,142 GSE – single-family 75,782 366 (812) 75,336 Total $ 78,905 $ 385 $ (812) $ 78,478 _______________________ (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 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 the U.S. Treasury, GSEs, U.S. government-owned corporations, supranational institutions, state housing finance agency obligations, and MBS issued by Government National Mortgage Association (Ginnie Mae), Federal Home Loan Mortgage Corporation (Freddie Mac), and Federal National Mortgage Association (Fannie Mae) that are backed by single-family or multifamily mortgage loans. We only purchase investment-grade securities. At September 30, 2024, and December 31, 2023, all available-for-sale securities and held-to-maturity securities were rated double-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 September 30, 2024, and December 31, 2023, 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 September 30, 2024, and December 31, 2023.

Advances

Advances	9 Months Ended
	Sep. 30, 2024
Advances [Abstract]
Federal Home Loan Bank, Advances [Text Block]	Advances General Terms. At both September 30, 2024, and December 31, 2023, we had advances outstanding with interest rates ranging from 0.00 percent to 6.23 percent. Table 3.1 - Advances Outstanding by Year of Contractual Maturity (dollars in thousands) September 30, 2024 December 31, 2023 Amount Weighted Amount Weighted Overdrawn demand-deposit accounts $ 5,013 5.23 % $ 5,909 5.76 % Due in one year or less 25,315,411 4.91 21,829,742 5.25 Due after one year through two years 5,509,786 4.35 9,069,939 4.53 Due after two years through three years 3,373,686 4.21 3,306,934 4.02 Due after three years through four years 3,330,861 3.54 2,295,317 4.37 Due after four years through five years 2,509,574 3.97 3,905,361 3.52 Due after five years through fifteen years 1,898,815 3.42 1,601,794 3.26 Thereafter 44,152 1.74 51,660 1.72 Total par value 41,987,298 4.55 % 42,066,656 4.71 % Discounts (36,556) (37,289) Fair value of bifurcated derivatives (1) — 790 Fair value hedging adjustments 56,064 (71,574) Total (2) $ 42,006,806 $ 41,958,583 _________________________ (1) At December 31, 2023, we had certain advances with embedded features that met the requirements to be separated from the host contract and designated those embedded features as stand-alone derivatives. (2) Excludes accrued interest receivable 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 3.2 - Advances Outstanding by Year of Contractual Maturity or Next Call Date (dollars in thousands) September 30, 2024 December 31, 2023 Overdrawn demand-deposit accounts $ 5,013 $ 5,909 Due in one year or less 27,073,306 26,546,662 Due after one year through two years 4,617,222 5,272,439 Due after two years through three years 2,789,655 2,989,434 Due after three years through four years 3,296,937 1,711,697 Due after four years through five years 2,356,311 3,887,061 Due after five years through fifteen years 1,804,702 1,601,794 Thereafter 44,152 51,660 Total par value $ 41,987,298 $ 42,066,656 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 3.3 - Advances Outstanding by Year of Contractual Maturity or Next Put Date (dollars in thousands) September 30, 2024 December 31, 2023 Overdrawn demand-deposit accounts $ 5,013 $ 5,909 Due in one year or less 32,220,332 27,338,812 Due after one year through two years 4,144,986 8,472,939 Due after two years through three years 1,960,065 1,996,364 Due after three years through four years 2,074,861 1,447,317 Due after four years through five years 700,574 1,955,361 Due after five years through fifteen years 837,315 798,294 Thereafter 44,152 51,660 Total par value $ 41,987,298 $ 42,066,656 Table 3.4 - Advances by Current Interest Rate Terms (dollars in thousands) September 30, 2024 December 31, 2023 Fixed-rate $ 35,332,343 $ 36,330,552 Variable-rate 6,654,955 5,736,104 Total par value $ 41,987,298 $ 42,066,656 Credit Risk Exposure and Security Terms. Our advances are primarily made to our members, 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 credit limits for borrowers based on ongoing reviews of each borrower's financial condition, the amount and value of available collateral, and collateral and lending policies that are intended to limit risk of loss while balancing borrowers' needs for a reliable source of funding. For additional information on credit risk exposure and security terms see Part II — Item 8 — Financial Statements and Supplementary Data — Note 6 — Advances in the 2023 Annual Report. The Bank’s decision to lend is based principally on our analysis of each borrower’s financial condition and outlook, though we consider the types and level of collateral as additional factors. At September 30, 2024, and December 31, 2023, we had rights to collateral, on a borrower-by-borrower basis, with an estimated value greater than our outstanding extensions of credit. We continue to evaluate and make changes to our collateral guidelines based on market conditions. At September 30, 2024, and December 31, 2023, none of our advances were past due, on nonaccrual status, or considered impaired. In addition, there were no modifications for borrowers experiencing financial difficulties related to advances during the nine months ended September 30, 2024 and 2023. 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 September 30, 2024, and December 31, 2023.

Mortgage Loans Held for Portfol

Mortgage Loans Held for Portfolio	9 Months Ended
	Sep. 30, 2024
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. Table 4.1 - Mortgage Loans Held for Portfolio (dollars in thousands) September 30, 2024 December 31, 2023 Real estate Fixed-rate 15-year single-family mortgages $ 165,130 $ 192,104 Fixed-rate 20- and 30-year single-family mortgages 3,338,564 2,831,319 Premiums 44,700 39,990 Discounts (3,153) (2,222) Deferred derivative gains, net 519 140 Total mortgage loans held for portfolio (1) 3,545,760 3,061,331 Less: allowance for credit losses (2,200) (2,000) Total mortgage loans, net of allowance for credit losses $ 3,543,560 $ 3,059,331 ________________________ (1) Excludes accrued interest receivable Table 4.2 - Mortgage Loans Held for Portfolio by Collateral/Guarantee Type (dollars in thousands) September 30, 2024 December 31, 2023 Conventional mortgage loans $ 3,366,023 $ 2,877,109 Government mortgage loans 137,671 146,314 Total par value $ 3,503,694 $ 3,023,423 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. For additional information on credit enhancements see Part II — Item 8 — Financial Statements and Supplementary Data — Note 7 — Mortgage Loans Held for Portfolio — Credit-Enhancements in the 2023 Annual Report. 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 for which 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 4.3 and 4.4 present the payment status for conventional mortgage loans and other delinquency statistics for all mortgage loans at September 30, 2024, and December 31, 2023. Table 4.3 - Credit Quality Indicator for Conventional Mortgage Loans (dollars in thousands) September 30, 2024 Year of Origination Payment Status at Amortized Cost (1) Prior to 2020 2020 to 2024 Total Past due 30-59 days delinquent $ 12,728 $ 7,509 $ 20,237 Past due 60-89 days delinquent 3,395 1,769 5,164 Past due 90 days or more delinquent 5,179 1,131 6,310 Total past due 21,302 10,409 31,711 Total current loans 1,324,869 2,049,094 3,373,963 Total conventional mortgage loans $ 1,346,171 $ 2,059,503 $ 3,405,674 December 31, 2023 Year of Origination Payment Status at Amortized Cost (1) Prior to 2019 2019 to 2023 Total Past due 30-59 days delinquent $ 9,392 $ 5,630 $ 15,022 Past due 60-89 days delinquent 3,068 1,694 4,762 Past due 90 days or more delinquent 6,841 889 7,730 Total past due 19,301 8,213 27,514 Total current loans 1,169,734 1,715,134 2,884,868 Total conventional mortgage loans $ 1,189,035 $ 1,723,347 $ 2,912,382 _________________________ (1) Amortized cost excludes accrued interest receivable. Table 4.4 - Other Delinquency Statistics of Mortgage Loans (dollars in thousands) September 30, 2024 Amortized Cost in Conventional Mortgage Loans Amortized Cost in Government Mortgage Loans Total In process of foreclosure (1) $ 1,016 $ 925 $ 1,941 Serious delinquency rate (2) 0.19 % 1.39 % 0.23 % Past due 90 days or more still accruing interest $ — $ 1,945 $ 1,945 Loans on nonaccrual status (3) $ 6,445 $ — $ 6,445 December 31, 2023 Amortized Cost in Conventional Mortgage Loans Amortized Cost in Government Mortgage Loans Total In process of foreclosure (1) $ 1,742 $ 623 $ 2,365 Serious delinquency rate (2) 0.27 % 0.94 % 0.30 % Past due 90 days or more still accruing interest $ — $ 1,356 $ 1,356 Loans on nonaccrual status (3) $ 7,913 $ — $ 7,913 _______________________ (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 amortized cost of the total loan portfolio class. (3) As of September 30, 2024, and December 31, 2023, $3.4 million and $4.3 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 mortgage loans are evaluated collectively when similar risk characteristics exist. Conventional mortgage loans that do not share risk characteristics with other mortgage loans are evaluated for expected credit losses on an individual basis. We determine our allowance for credit losses on conventional mortgage 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 several 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 mortgage 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 made 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 conventional 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 reserve for these estimated losses or record a direct charge-off of the loan balance if certain triggering criteria are met. Table 4.5 presents a roll forward of the allowance for credit losses on conventional mortgage loans for the three and nine months ended September 30, 2024 and 2023. Table 4.5 - Allowance for Credit Losses on Conventional Mortgage Loans (dollars in thousands) For the Three Months Ended September 30, For the Nine Months Ended September 30, 2024 2023 2024 2023 Allowance for credit losses (1) Balance, beginning of period $ 2,200 $ 2,000 $ 2,000 $ 1,900 Net recoveries 4 8 4 15 (Reduction of) provision for credit losses (4) (8) 196 85 Balance, end of period $ 2,200 $ 2,000 $ 2,200 $ 2,000 _________________________ (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 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 will 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 September 30, 2024, and December 31, 2023. 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. "Mortgage Partnership Finance," "MPF," "eMPF" and "MPF Xtra" are registered trademarks of the Federal Home Loan Bank of Chicago.

Derivatives and Hedging Activit

Derivatives and Hedging Activities	9 Months Ended
	Sep. 30, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Activities [Text Block]	Derivatives and Hedging Activities Table 5.1 - Fair Value of Derivative Instruments (dollars in thousands) September 30, 2024 December 31, 2023 Notional Derivative Derivative Notional Derivative Derivative Derivatives designated as hedging instruments Interest-rate swaps $ 50,587,956 $ 86,842 $ (685,517) $ 51,587,480 $ 77,093 $ (1,009,217) Forward-start interest-rate swaps 941,000 1,094 (1,550) 1,391,000 254 (170) Total derivatives designated as hedging instruments 51,528,956 87,936 (687,067) 52,978,480 77,347 (1,009,387) Derivatives not designated as hedging instruments Interest-rate swaps 1,641,043 — (236) 90,000 — (729) Mortgage-delivery commitments (1) 69,710 108 (155) 29,995 290 — Total derivatives not designated as hedging instruments 1,710,753 108 (391) 119,995 290 (729) Total notional amount of derivatives $ 53,239,709 $ 53,098,475 Total derivatives before netting and collateral adjustments 88,044 (687,458) 77,637 (1,010,116) Netting adjustments and cash collateral, including related accrued interest (2) 267,379 680,614 305,436 1,007,099 Derivative assets and derivative liabilities $ 355,423 $ (6,844) $ 383,073 $ (3,017) _______________________ (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 $952.4 million and $1.3 billion at September 30, 2024, and December 31, 2023, respectively. The change in cash collateral posted is included in the net change in interest-bearing deposits in the statement of cash flows. Cash collateral received, including accrued interest, was $4.4 million and $3.8 million at September 30, 2024, and December 31, 2023. Changes in fair value of the derivative hedging instrument and the hedged item attributable to the hedged risk for designated fair-value hedges are recorded in net interest income in the same line as the earnings effect of the hedged item. For designated cash-flow hedges, the entire change in the fair value of the hedging instrument (assuming it is included in the assessment of hedge effectiveness) is reported in other comprehensive income until the hedged transaction affects earnings. At that time, this amount is reclassified from other comprehensive income and recorded in net interest income in the same line as the earnings effect of the hedged item. Tables 5.2 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 5.2 - Net Gains (Losses) on Fair Value Hedging Relationships (dollars in thousands) For the Three Months Ended September 30, 2024 Advances Available-for-sale Securities CO Bonds Total interest income (expense) presented on the statements of operations $ 535,200 $ 234,545 $ (567,157) Gains (losses) on fair value hedging relationships Changes in fair value: Derivatives $ (212,219) $ (381,278) $ 358,310 Hedged items 208,913 375,947 (358,256) Net changes in fair value before price alignment interest (3,306) (5,331) 54 Price alignment interest (1) (2,204) (10,679) 416 Net interest settlements on derivatives (2)(3) 56,387 122,394 (151,214) Net gains (losses) on qualifying hedging relationships 50,877 106,384 (150,744) Amortization/accretion of discontinued hedging relationships (166) — (847) Net gains (losses) on derivatives and hedging activities recorded in net interest income $ 50,711 $ 106,384 $ (151,591) For the Three Months Ended September 30, 2023 Advances Available-for-sale Securities CO Bonds Total interest income (expense) presented on the statements of operations $ 486,508 $ 214,392 $ (477,389) Gains (losses) on fair value hedging relationships Changes in fair value: Derivatives $ 32,714 $ 144,001 $ (2,046) Hedged items (32,778) (144,300) 3,198 Net changes in fair value before price alignment interest (64) (299) 1,152 Price alignment interest (1) (2,771) (15,008) 332 Net interest settlements on derivatives (2)(3) 53,399 125,784 (170,493) Net gains (losses) on qualifying hedging relationships 50,564 110,477 (169,009) Amortization/accretion of discontinued hedging relationships (366) — (1,463) Net gains (losses) on derivatives and hedging activities recorded in net interest income $ 50,198 $ 110,477 $ (170,472) For the Nine Months Ended September 30, 2024 Advances Available-for-sale Securities CO Bonds Total interest income (expense) presented on the statements of operations $ 1,615,872 $ 707,504 $ (1,609,188) Gains (losses) on fair value hedging relationships Changes in fair value: Derivatives $ (104,427) $ (280,496) $ 396,862 Hedged items 103,489 278,177 (397,515) Net changes in fair value before price alignment interest (938) (2,319) (653) Price alignment interest (1) (4,075) (40,184) 1,302 Net interest settlements on derivatives (2)(3) 172,692 371,440 (470,450) Net gains (losses) on qualifying hedging relationships 167,679 328,937 (469,801) Amortization/accretion of discontinued hedging relationships (813) — (3,550) Net gains (losses) on derivatives and hedging activities recorded in net interest income $ 166,866 $ 328,937 $ (473,351) For the Nine Months Ended September 30, 2023 Advances Available-for-sale Securities CO Bonds Total interest income (expense) presented on the statements of operations $ 1,587,597 $ 590,767 $ (1,349,479) Gains (losses) on fair value hedging relationships Changes in fair value: Derivatives $ 52,677 $ 120,049 $ 79,608 Hedged items (52,407) (123,228) (78,646) Net changes in fair value before price alignment interest 270 (3,179) 962 Price alignment interest (1) (6,354) (35,365) 872 Net interest settlements on derivatives (2)(3) 125,370 337,838 (468,235) Net gains (losses) on qualifying hedging relationships 119,286 299,294 (466,401) Amortization/accretion of discontinued hedging relationships (1,349) — (621) Net gains (losses) on derivatives and hedging activities recorded in net interest income $ 117,937 $ 299,294 $ (467,022) _______________________ (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. Table 5.3 presents the net gains (losses) on qualifying cash flow hedging relationships. Table 5.3 - Net (Losses) Gains on Cash Flow Hedging Relationships (dollars in thousands) For the Three Months Ended September 30, For the Nine Months Ended September 30, 2024 2023 2024 2023 Forward-start interest rate swaps - CO Bonds Gains (losses) reclassified from accumulated other comprehensive loss into interest expense $ 1,314 $ (1,130) $ (39) $ (3,374) (Losses) gains recognized in other comprehensive income (18,767) 22,950 3,592 25,497 For the nine months ended September 30, 2024 and 2023, 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 period or within a two-month period thereafter. As of September 30, 2024, the maximum length of time over which we are hedging our exposure to the variability in future cash flows for forecasted transactions is seven years. As of September 30, 2024, 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 $8.5 million. Table 5.4 - Cumulative Basis Adjustments for Fair-Value Hedges (dollars in thousands) September 30, 2024 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 $ 14,612,292 $ 51,014 $ 5,050 $ 56,064 Available-for-sale securities 11,184,356 608,767 — 608,767 Consolidated obligation bonds 23,599,942 (496,541) 35,153 (461,388) _______________________ (1) Includes only the amortized cost of hedged items in fair-value hedging relationships. 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 5.5 - Impact of Variation Margin for Cleared Derivatives on the Statement of Cash Flows (dollars in thousands) Increase (decrease) on Cash Flow Statement For the Nine Months Ended September 30, 2024 2023 Operating activity - net change in derivatives and hedging activities $ (310,209) $ 400,260 Financing activity - net receipts on derivatives with a financing element 1,619 50,123 Total variation margin (paid) received on cleared derivatives $ (308,590) $ 450,383 Managing Credit Risk on Derivatives. We enter into derivatives that we clear (cleared derivatives) with a derivatives clearing organization (DCO), our counterparty for such derivatives. We also enter into derivatives that are not cleared (uncleared derivatives) under master-netting agreements. Derivatives that we use containing any optionality are not currently 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 rating is lowered to a certain level by Moody's Investors Service Inc. (Moody's) or Standard & Poor's Financial Services LLC (S&P). 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 September 30, 2024, was $631.2 million for which we had delivered collateral with a post-haircut value of $632.1 million 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 5.6 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 September 30, 2024. Table 5.6 - Post Haircut Value of Incremental Collateral to be Delivered as of September 30, 2024 (dollars in thousands) Ratings Downgrade (1) From To Incremental Collateral AA+ AA or AA- $ — AA- A+, A or A- — A- below A- 69,734 _______________________ (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, Chicago Mercantile Exchange, Inc. (CME Inc.) or LCH Limited (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 U.S. Commodity Futures Trading Commission-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. 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 5.7 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 September 30, 2024, and December 31, 2023, which includes cleared and uncleared interest rate swaps, and the fair value of derivatives that are not subject to such netting, which includes mortgage delivery commitments and CO bond firm commitments. Derivatives subject to netting include any related cash collateral received from or pledged to counterparties. Table 5.7 - Netting of Derivative Assets and Derivative Liabilities (dollars in thousands) September 30, 2024 Derivative Instruments Meeting Netting Requirements Gross Recognized Amount Gross Amounts of Netting Adjustments and Cash Collateral Derivative Instruments Not Meeting Netting Requirements Total Derivative Assets and Total Derivative Liabilities Derivative Assets Interest-rate swaps Uncleared $ 50,281 $ (42,958) $ 7,323 Cleared 37,655 310,337 347,992 Mortgage delivery commitments $ 108 108 Total $ 355,423 Derivative Liabilities Interest-rate swaps Uncleared $ (677,371) $ 670,682 $ (6,689) Cleared (9,931) 9,931 — Mortgage delivery commitments $ (155) (155) Total $ (6,844) December 31, 2023 Derivative Instruments Meeting Netting Requirements Gross Recognized Amount Gross Amounts of Netting Adjustments and Cash Collateral Derivative Instruments Not Meeting Netting Requirements Total Derivative Assets and Total Derivative Liabilities Derivative Assets Interest-rate swaps Uncleared $ 72,517 $ (69,838) $ 2,679 Cleared 4,830 375,274 380,104 Mortgage delivery commitment $ 290 290 Total $ 383,073 Derivative Liabilities Interest-rate swaps Uncleared $ (997,974) $ 994,957 $ (3,017) Cleared (12,142) 12,142 — Total $ (3,017)

Deposits

Deposits	9 Months Ended
	Sep. 30, 2024
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. Table 6.1 - Deposits (dollars in thousands) September 30, 2024 December 31, 2023 Interest-bearing Demand and overnight $ 728,197 $ 896,005 Noninterest-bearing Other 37,634 26,874 Total deposits $ 765,831 $ 922,879 None of the deposits are federally insured.

Consolidated Obligations

Consolidated Obligations	9 Months Ended
	Sep. 30, 2024
Debt Disclosure [Abstract]
Consolidated Obligations [Text Block]	Consolidated Obligations CO Bonds. CO bonds for which we have received issuance proceeds and are primarily liable were as follows: Table 7.1 - CO Bonds Outstanding by Contractual Maturity (dollars in thousands) September 30, 2024 December 31, 2023 Amount Weighted Average Rate (1) Amount Weighted Average Rate (1) Due in one year or less $ 32,036,475 4.31 % $ 17,841,615 4.27 % Due after one year through two years 8,169,250 2.36 7,476,350 2.86 Due after two years through three years 4,123,300 2.92 7,014,955 1.76 Due after three years through four years 3,326,480 3.22 2,854,250 2.94 Due after four years through five years 1,884,515 3.87 2,712,400 2.94 Thereafter 3,247,820 3.38 3,193,305 2.95 Total par value 52,787,840 3.76 % 41,092,875 3.30 % Premiums 25,831 32,419 Discounts (13,693) (14,451) Hedging adjustments (461,388) (862,100) Total $ 52,338,590 $ 40,248,743 _______________________ (1) The CO bonds' weighted-average rate excludes concession fees. Table 7.2 - CO Bonds Outstanding by Early Redemption Feature (dollars in thousands) September 30, 2024 December 31, 2023 Noncallable and nonputable $ 33,537,640 $ 18,882,235 Callable 19,250,200 22,210,640 Total par value $ 52,787,840 $ 41,092,875 Table 7.3 - CO Bonds Outstanding by Contractual Maturity or Next Call Date (dollars in thousands) September 30, 2024 December 31, 2023 Due in one year or less $ 43,735,675 $ 30,900,615 Due after one year through two years 3,789,250 4,203,850 Due after two years through three years 1,441,100 2,487,955 Due after three years through four years 1,606,480 852,750 Due after four years through five years 789,515 1,171,400 Thereafter 1,425,820 1,476,305 Total par value $ 52,787,840 $ 41,092,875 Table 7.4 - CO Bonds by Interest Rate-Payment Type (dollars in thousands) September 30, 2024 December 31, 2023 Fixed-rate $ 31,437,840 $ 32,454,235 Simple variable-rate 16,253,000 3,012,500 Step-up (1) 5,097,000 5,626,140 Total par value $ 52,787,840 $ 41,092,875 _______________________ (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 7.5 - CO Discount Notes Outstanding (dollars in thousands) Book Value Par Value Weighted Average Rate (1) September 30, 2024 $ 14,941,067 $ 15,030,861 5.11 % December 31, 2023 $ 22,000,546 $ 22,150,970 5.31 % _______________________ (1) CO discount notes' weighted-average rate represents a yield to maturity excluding concession fees.

Affordable Housing Program

Affordable Housing Program	9 Months Ended
	Sep. 30, 2024
Affordable Housing Program AHP [Abstract]
Affordable Housing Program [Text Block]	Affordable Housing Program Table 8.1 - AHP Liability (dollars in thousands) September 30, 2024 December 31, 2023 Balance at beginning of year $ 87,164 $ 76,622 AHP expense for the period 23,193 28,648 AHP voluntary contribution 1,852 2,000 AHP direct grant disbursements (14,132) (16,144) AHP subsidy for AHP advance disbursements (998) (3,965) Return of previously disbursed grants and subsidies 302 3 Balance at end of period $ 97,381 $ 87,164

Capital

Capital	9 Months Ended
	Sep. 30, 2024
Banking Regulation, Total Capital [Abstract]
Capital [Text Block]	Capital Regulatory Capital Requirements. We are subject to three capital requirements at all times under our capital plan, the Federal Home Loan Bank Act of 1932 (as amended, the FHLBank Act), and FHFA regulations and guidance: 1. Risk-based capital. We are required to maintain 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, market-risk, and operational-risk capital requirements, all of which are 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 a total capital-to-assets ratio of at least four percent. 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 a leverage capital-to-assets ratio of at least five percent. Leverage capital is defined as the sum of permanent capital weighted 1.5 times and all other components of total capital. The FHFA has authority to require us to maintain greater minimum capital levels than are required based on FHFA rules and regulations. Table 9.1 - Regulatory Capital Requirements (dollars in thousands) September 30, 2024 December 31, 2023 Required Actual Required Actual Risk-based capital $ 589,241 $ 4,040,103 $ 628,052 $ 3,839,236 Regulatory capital $ 2,895,874 $ 4,040,103 $ 2,685,691 $ 3,839,236 Capital-to-asset ratio 4.0 % 5.6 % 4.0 % 5.7 % Leverage capital $ 3,619,842 $ 6,060,155 $ 3,357,114 $ 5,758,854 Leverage capital-to-assets ratio 5.0 % 8.4 % 5.0 % 8.6 % 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 standby letters of credit, and 4.50 percent of the par value of certain mortgage loans 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. Mandatorily Redeemable Capital Stock. Table 9.2 - Mandatorily Redeemable Capital Stock by Expiry of Redemption Notice Period (dollars in thousands) September 30, 2024 December 31, 2023 Past redemption date (1) $ 2,669 $ 2,778 Due in one year or less 435 — Due after one year through two years 689 435 Due after two years through three years 960 689 Due after three years through four years 333 960 Due after four years through five years — 1,221 Total $ 5,086 $ 6,083 _______________________ (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. Restricted Retained Earnings. At September 30, 2024, our restricted retained earnings contribution requirement totaled $643.6 million. At September 30, 2024, and December 31, 2023, restricted retained earnings totaled $492.8 million and $451.2 million, respectively. These restricted retained earnings are not available to pay dividends.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2024
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income (Loss) [Text Block]	Accumulated Other Comprehensive Income (Loss) Table 10.1 - Accumulated Other Comprehensive Income (Loss) (dollars in thousands) Net Unrealized Gain (Loss) on Available-for-sale Securities Net Unrealized Gain (Loss) Relating to Hedging Activities Pension and Postretirement Benefits Total Accumulated Other Comprehensive Gain (Loss) Balance, June 30, 2023 $ (340,077) $ 47,273 $ 1,119 $ (291,685) Other comprehensive (loss) income before reclassifications: Net unrealized (losses) gains (58,738) 22,950 — (35,788) Net actuarial loss — — (122) (122) Reclassifications from other comprehensive income to net income Amortization - hedging activities (1) — 1,130 — 1,130 Other comprehensive (loss) income (58,738) 24,080 (122) (34,780) Balance, September 30, 2023 $ (398,815) $ 71,353 $ 997 $ (326,465) Balance, June 30, 2024 $ (338,781) $ 69,676 $ 598 $ (268,507) Other comprehensive (loss) income before reclassifications: Net unrealized gains (losses) 61,005 (18,767) — 42,238 Net actuarial loss — — (76) (76) Reclassifications from other comprehensive income to net income Amortization - hedging activities (1) — (1,314) — (1,314) Other comprehensive income (loss) 61,005 (20,081) (76) 40,848 Balance, September 30, 2024 $ (277,776) $ 49,595 $ 522 $ (227,659) Balance, December 31, 2022 $ (350,281) $ 42,482 $ 1,374 $ (306,425) Other comprehensive (loss) income before reclassifications: Net unrealized (losses) gains (48,534) 25,497 — (23,037) Net actuarial loss — — (377) (377) Reclassifications from other comprehensive income to net income Amortization - hedging activities (1) — 3,374 — 3,374 Other comprehensive (loss) income (48,534) 28,871 (377) (20,040) Balance, September 30, 2023 $ (398,815) $ 71,353 $ 997 $ (326,465) Balance, December 31, 2023 $ (341,252) $ 45,964 $ 749 $ (294,539) Other comprehensive income (loss) before reclassifications: Net unrealized gains 63,476 3,592 — 67,068 Net actuarial loss — — (227) (227) Reclassifications from other comprehensive income to net income Amortization - hedging activities (1) — 39 — 39 Other comprehensive income (loss) 63,476 3,631 (227) 66,880 Balance, September 30, 2024 $ (277,776) $ 49,595 $ 522 $ (227,659) _______________________ (1) Recorded in CO bond interest expense.

Fair Values

Fair Values	9 Months Ended
	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Fair Value [Text Block]	Fair Values A fair-value hierarchy is used to prioritize the inputs of valuation techniques used to measure fair value. A description of the application of the fair-value hierarchy, valuation techniques, and significant inputs is disclosed in Part II — Item 8 — Financial Statements and Supplementary Data — Note 15 — Fair Values in the 2023 Annual Report. There have been no material changes in the fair-value hierarchy classification of financial assets and liabilities, valuation techniques, or significant inputs during the three months ended September 30, 2024. Table 11.1 presents the carrying value, fair value, and fair value hierarchy of our financial assets and liabilities at September 30, 2024, and December 31, 2023. 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 at fair value on a non-recurring basis. We record all other financial assets and liabilities at amortized cost. Refer to Table 11.2 for further details about the financial assets and liabilities held at fair value on either a recurring or non-recurring basis. Table 11.1 - Fair Value Summary (dollars in thousands) September 30, 2024 Carrying Total Fair Value Level 1 Level 2 Level 3 Netting Adjustments and Cash Collateral (2) Financial instruments Assets: Cash and due from banks $ 50,242 $ 50,242 $ 50,242 $ — $ — $ — Interest-bearing deposits 1,809,628 1,809,628 1,809,628 — — — Securities purchased under agreements to resell 2,750,000 2,750,001 — 2,750,001 — — Federal funds sold 4,585,000 4,584,997 — 4,584,997 — — Trading securities (1) 1,496 1,496 — 1,496 — — Available-for-sale securities (1) 16,925,261 16,925,261 — 16,903,870 21,391 — Held-to-maturity securities 66,439 66,475 — 66,475 — — Advances 42,006,806 41,988,285 — 41,988,285 — — Mortgage loans, net 3,543,560 3,354,085 — 3,341,656 12,429 — Accrued interest receivable 223,195 223,195 — 223,195 — — Derivative assets (1) 355,423 355,423 — 88,044 — 267,379 Other assets (1) 32,874 32,874 16,489 16,385 — — Liabilities: Deposits (765,831) (765,807) — (765,807) — — COs: Bonds (52,338,590) (52,205,575) — (52,205,575) — — Discount notes (14,941,067) (14,946,443) — (14,946,443) — — Mandatorily redeemable capital stock (5,086) (5,086) (5,086) — — — Accrued interest payable (361,110) (361,110) — (361,110) — — Derivative liabilities (1) (6,844) (6,844) — (687,458) — 680,614 Other: Commitments to extend credit for advances — (267) — (267) — — Standby letters of credit (1,526) (1,526) — (1,526) — — December 31, 2023 Carrying Total Fair Level 1 Level 2 Level 3 Netting Adjustments and Cash Collateral (2) Financial instruments Assets: Cash and due from banks $ 53,412 $ 53,412 $ 53,412 $ — $ — $ — Interest-bearing deposits 1,643,587 1,643,587 1,643,587 — — — Securities purchased under agreements to resell 1,600,000 1,599,996 — 1,599,996 — — Federal funds sold 2,500,000 2,499,995 — 2,499,995 — — Trading securities (1) 1,395 1,395 — 1,395 — — Available-for-sale securities (1) 15,343,745 15,343,745 — 15,321,940 21,805 — Held-to-maturity securities 78,905 78,478 — 78,478 — — Advances 41,958,583 41,834,762 — 41,834,762 — — Mortgage loans, net 3,059,331 2,796,000 — 2,781,976 14,024 — Accrued interest receivable 185,709 185,709 — 185,709 — — Derivative assets (1) 383,073 383,073 — 77,637 — 305,436 Other assets (1) 28,369 28,369 13,724 14,645 — — Liabilities: Deposits (922,879) (922,830) — (922,830) — — COs: Bonds (40,248,743) (39,887,287) — (39,887,287) — — Discount notes (22,000,546) (21,998,576) — (21,998,576) — — Mandatorily redeemable capital stock (6,083) (6,083) (6,083) — — — Accrued interest payable (269,517) (269,517) — (269,517) — — Derivative liabilities (1) (3,017) (3,017) — (1,010,116) — 1,007,099 Other: Commitments to extend credit for advances — (2,101) — (2,101) — — Standby letters of credit (1,340) (1,340) — (1,340) — — _______________________ (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 a Recurring and Nonrecurring Basis. Table 11.2 - Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis (dollars in thousands) September 30, 2024 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 $ — $ 1,496 $ — $ — $ 1,496 Available-for-sale securities: U.S. Treasury obligations — 5,844,132 — — 5,844,132 HFA securities — — 21,391 — 21,391 Supranational institutions — 343,666 — — 343,666 U.S. government-owned corporations — 237,634 — — 237,634 GSE — 100,216 — — 100,216 U.S. government guaranteed – single-family MBS — 206,443 — — 206,443 U.S. government guaranteed – multifamily MBS — 471,494 — — 471,494 GSE – single-family MBS — 2,084,454 — — 2,084,454 GSE – multifamily MBS — 7,615,831 — — 7,615,831 Total available-for-sale securities — 16,903,870 21,391 — 16,925,261 Derivative assets: Interest-rate-exchange agreements — 87,936 — 267,379 355,315 Mortgage delivery commitments — 108 — — 108 Total derivative assets — 88,044 — 267,379 355,423 Other assets 16,489 16,385 — — 32,874 Total assets carried at fair value on a recurring basis $ 16,489 $ 17,009,795 $ 21,391 $ 267,379 $ 17,315,054 Liabilities: Carried at fair value on a recurring basis Derivative liabilities Interest-rate-exchange agreements $ — $ (687,303) $ — $ 680,614 $ (6,689) Mortgage delivery commitments — (155) — — (155) Total liabilities carried at fair value on a recurring basis $ — $ (687,458) $ — $ 680,614 $ (6,844) December 31, 2023 Level 1 Level 2 Level 3 Netting (1) Total Assets: Carried at fair value on a recurring basis Trading securities: Corporate bonds $ — $ 1,395 $ — $ — $ 1,395 Available-for-sale securities: U.S. Treasury obligations — 5,664,452 — — 5,664,452 HFA securities — — 21,805 — 21,805 Supranational institutions — 346,375 — — 346,375 U.S. government-owned corporations — 235,191 — — 235,191 GSE — 99,421 — — 99,421 U.S. government guaranteed – single-family MBS — 14,433 — — 14,433 U.S. government guaranteed – multifamily MBS — 477,676 — — 477,676 GSE – single-family MBS — 904,456 — — 904,456 GSE – multifamily MBS — 7,579,936 — — 7,579,936 Total available-for-sale securities — 15,321,940 21,805 — 15,343,745 Derivative assets: Interest-rate-exchange agreements — 77,347 — 305,436 382,783 Mortgage delivery commitments — 290 — — 290 Total derivative assets — 77,637 — 305,436 383,073 Other assets 13,724 14,645 — — 28,369 Total assets carried at fair value on a recurring basis $ 13,724 $ 15,415,617 $ 21,805 $ 305,436 $ 15,756,582 Liabilities: Carried at fair value on a recurring basis Derivative liabilities Interest-rate-exchange agreements $ — $ (1,010,116) $ — $ 1,007,099 $ (3,017) Total liabilities carried at fair value on a recurring basis $ — $ (1,010,116) $ — $ 1,007,099 $ (3,017) _______________________ (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. Table 11.3 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 three and nine months ended September 30, 2024 and 2023. Table 11.3 - Roll Forward of Level 3 Available-for-Sale HFA Securities (dollars in thousands) For the Three Months Ended September 30, For the Nine Months Ended September 30, 2024 2023 2024 2023 Balance at beginning of period $ 21,174 $ 32,391 $ 21,805 $ 32,774 Total gains included in other comprehensive income Net unrealized gains 217 298 556 825 Sales, maturities, and settlements Settlements — — (970) (910) Balance at end of period $ 21,391 $ 32,689 $ 21,391 $ 32,689 Total amount of unrealized gains for the period included in other comprehensive income relating to securities held at period end $ 217 $ 298 $ 556 $ 825

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2024
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 11 district Federal Home Loan Banks (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 September 30, 2024, 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 September 30, 2024, and December 31, 2023. The par amounts of other FHLBanks' outstanding COs for which we are jointly and severally liable totaled $1.1 trillion at both September 30, 2024, and December 31, 2023. See Note 7 — Consolidated Obligations for additional information. Off-Balance-Sheet Commitments Table 12.1 - Off-Balance Sheet Commitments (1) (dollars in thousands) September 30, 2024 December 31, 2023 Expire within one year Expire after one year Total Expire within one year Expire after one year Total Standby letters of credit outstanding (2) $ 8,460,340 $ 314,262 $ 8,774,602 $ 8,217,388 $ 207,677 $ 8,425,065 Commitments for unused lines of credit - advances (3) 1,102,651 — 1,102,651 1,113,354 — 1,113,354 Commitments to make additional advances 21,350 12,263 33,613 13,170 20,463 33,633 Commitments to invest in mortgage loans 69,710 — 69,710 29,995 — 29,995 Unsettled CO bonds, at par 98,000 — 98,000 131,500 — 131,500 Unsettled CO discount notes, at par — — — 61,008 — 61,008 __________________________ (1) We have determined that it is unnecessary to record any liability for credit losses on these agreements based on our credit extension and collateral policies. (2) The amount of standby letters of credit outstanding excludes commitments to issue standby letters of credit. At September 30, 2024, and December 31, 2023, commitments to issue standby letters of credit that expire within one year totaled $47.9 million and $16.0 million, respectively, and at December 31, 2023, commitments to issue standby letters of credit that expire after one year totaled $13.1 million. (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 . At September 30, 2024, the outstanding standby letters of credit issued expire no later than 2039. 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 $1.5 million and $1.3 million at September 30, 2024, and December 31, 2023, respectively. 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 5 — 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.

Transactions with Shareholders

Transactions with Shareholders	9 Months Ended
	Sep. 30, 2024
Transactions with Shareholders [Abstract]
Transactions with Shareholders [Text Block]	Transactions with Shareholders 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. Table 13.1 - Shareholder Concentrations, Balance Sheet (dollars in thousands) Capital Stock Percent Par Percent of Total Par Value Total Accrued Percent of Total September 30, 2024 State Street Bank and Trust Company $ 335,000 15.5 % $ 6,000,000 14.3 % $ 39,102 25.0 % 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 13.2 - Transactions with Directors' Institutions (dollars in thousands) Capital Stock Percent Par Percent of Total Par Value Total Accrued Percent of Total September 30, 2024 $ 49,352 2.3 % $ 677,825 1.6 % $ 869 0.6 % December 31, 2023 201,250 9.8 4,485,824 10.7 5,953 5.2

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2024
Subsequent Events [Abstract]
Subsequent Events [Text Block]	Subsequent Events On October 25, 2024, the board of directors declared a cash dividend at an annualized rate of 8.36 percent based on daily average capital stock balances outstanding during the third quarter of 2024. The dividend, including dividends classified as interest on mandatorily redeemable capital stock, amounted to $43.0 million and was paid on November 4, 2024.

Basis of Presentation - Summary

Basis of Presentation - Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2024
Accounting Policies [Abstract]
Credit Loss, Financial Instrument, Policy	Allowance for Credit Losses on Available-for-Sale Securities and Held-to-Maturity Securities
Derivatives, Policy	. Changes in fair value of the derivative hedging instrument and the hedged item attributable to the hedged risk for designated fair-value hedges are recorded in net interest income in the same line as the earnings effect of the hedged item. For designated cash-flow hedges, the entire change in the fair value of the hedging instrument (assuming it is included in the assessment of hedge effectiveness) is reported in other comprehensive income until the hedged transaction affects earnings. At that time, this amount is reclassified from other comprehensive income and recorded in net interest income in the same line as the earnings effect of the hedged item. Managing Credit Risk on Derivatives.
Fair Value of Financial Instruments, Policy	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 at fair value on a non-recurring basis. We record all other financial assets and liabilities at amortized cost.
Joint and Several Liability, Policy	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)	9 Months Ended
	Sep. 30, 2024
Investments, Debt and Equity Securities [Abstract]
Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block]	Table 2.1 - Trading Securities by Major Security Type (dollars in thousands) September 30, 2024 December 31, 2023 Corporate bonds $ 1,496 $ 1,395
Schedule of Available-for-sale Securities Reconciliation [Table Text Block]	Table 2.2 - Available-for-Sale Securities by Major Security Type (dollars in thousands) September 30, 2024 Amounts Recorded in Accumulated Other Comprehensive Income Amortized Cost (1) Unrealized Unrealized Fair U.S. Treasury obligations $ 5,856,446 $ 363 $ (12,677) $ 5,844,132 State housing-finance-agency obligations (HFA securities) 21,460 9 (78) 21,391 Supranational institutions 347,068 17 (3,419) 343,666 U.S. government-owned corporations 253,228 — (15,594) 237,634 GSE 104,044 — (3,828) 100,216 6,582,246 389 (35,596) 6,547,039 Mortgage-backed securities (MBS) U.S. government guaranteed – single-family 207,989 372 (1,918) 206,443 U.S. government guaranteed – multifamily 512,346 — (40,852) 471,494 GSE – single-family 2,117,517 5,726 (38,789) 2,084,454 GSE – multifamily 7,782,939 8,050 (175,158) 7,615,831 10,620,791 14,148 (256,717) 10,378,222 Total $ 17,203,037 $ 14,537 $ (292,313) $ 16,925,261 December 31, 2023 Amounts Recorded in Accumulated Other Comprehensive Income Amortized Cost (1) Unrealized Unrealized Fair U.S. Treasury obligations $ 5,684,157 $ 122 $ (19,827) $ 5,664,452 HFA securities 22,430 — (625) 21,805 Supranational institutions 350,282 3 (3,910) 346,375 U.S. government-owned corporations 252,585 — (17,394) 235,191 GSE 104,015 — (4,594) 99,421 6,413,469 125 (46,350) 6,367,244 MBS U.S. government guaranteed – single-family 16,854 — (2,421) 14,433 U.S. government guaranteed – multifamily 521,203 — (43,527) 477,676 GSE – single-family 954,298 1,665 (51,507) 904,456 GSE – multifamily 7,779,173 3,517 (202,754) 7,579,936 9,271,528 5,182 (300,209) 8,976,501 Total $ 15,684,997 $ 5,307 $ (346,559) $ 15,343,745 _______________________ (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 2.3 - Available-for-Sale Securities in a Continuous Unrealized Loss Position (dollars in thousands) September 30, 2024 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 $ 1,189,830 $ (815) $ 3,193,324 $ (11,862) $ 4,383,154 $ (12,677) HFA securities — — 13,742 (78) 13,742 (78) Supranational institutions — — 331,252 (3,419) 331,252 (3,419) U.S. government-owned corporations — — 237,634 (15,594) 237,634 (15,594) GSE — — 100,216 (3,828) 100,216 (3,828) 1,189,830 (815) 3,876,168 (34,781) 5,065,998 (35,596) MBS U.S. government guaranteed – single-family — — 13,527 (1,918) 13,527 (1,918) U.S. government guaranteed – multifamily — — 471,494 (40,852) 471,494 (40,852) GSE – single-family 177,641 (88) 540,481 (38,701) 718,122 (38,789) GSE – multifamily 313,431 (1,172) 5,302,715 (173,986) 5,616,146 (175,158) 491,072 (1,260) 6,328,217 (255,457) 6,819,289 (256,717) Total $ 1,680,902 $ (2,075) $ 10,204,385 $ (290,238) $ 11,885,287 $ (292,313) December 31, 2023 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 $ 1,865,124 $ (1,405) $ 3,319,996 $ (18,422) $ 5,185,120 $ (19,827) HFA securities — — 21,805 (625) 21,805 (625) Supranational institutions 82,354 (188) 251,452 (3,722) 333,806 (3,910) U.S. government-owned corporations — — 235,191 (17,394) 235,191 (17,394) GSE — — 99,421 (4,594) 99,421 (4,594) 1,947,478 (1,593) 3,927,865 (44,757) 5,875,343 (46,350) MBS U.S. government guaranteed – single-family — — 14,433 (2,421) 14,433 (2,421) U.S. government guaranteed – multifamily — — 477,676 (43,527) 477,676 (43,527) GSE – single-family 55,457 (117) 616,857 (51,390) 672,314 (51,507) GSE – multifamily 1,238,598 (2,993) 5,299,421 (199,761) 6,538,019 (202,754) 1,294,055 (3,110) 6,408,387 (297,099) 7,702,442 (300,209) Total $ 3,241,533 $ (4,703) $ 10,336,252 $ (341,856) $ 13,577,785 $ (346,559)
Investments Classified by Contractual Maturity Date [Table Text Block]	Table 2.4 - Available-for-Sale Securities by Contractual Maturity (dollars in thousands) September 30, 2024 December 31, 2023 Year of Maturity Amortized Fair Amortized Fair Due in one year or less $ 1,246,798 $ 1,247,046 $ 13,820 $ 13,210 Due after one year through five years 5,017,493 5,001,325 6,082,462 6,058,571 Due after five years through 10 years — — — — Due after 10 years 317,955 298,668 317,187 295,463 6,582,246 6,547,039 6,413,469 6,367,244 MBS (1) 10,620,791 10,378,222 9,271,528 8,976,501 Total $ 17,203,037 $ 16,925,261 $ 15,684,997 $ 15,343,745 _______________________ (1) MBS are not presented by contractual maturity because their expected maturities will likely differ from contractual maturities since 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 2.5 - Held-to-Maturity Securities by Major Security Type (dollars in thousands) September 30, 2024 Amortized Cost (1) Gross Unrecognized Holding Gains Gross Unrecognized Holding Losses Fair Value MBS U.S. government guaranteed – single-family $ 2,861 $ 16 $ — $ 2,877 GSE – single-family 63,578 561 (541) 63,598 Total $ 66,439 $ 577 $ (541) $ 66,475 December 31, 2023 Amortized Cost (1) Gross Unrecognized Holding Gains Gross Unrecognized Holding Losses Fair Value MBS U.S. government guaranteed – single-family $ 3,123 $ 19 $ — $ 3,142 GSE – single-family 75,782 366 (812) 75,336 Total $ 78,905 $ 385 $ (812) $ 78,478 _______________________ (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

Advances (Tables)

Advances (Tables)	9 Months Ended
	Sep. 30, 2024
Advances [Abstract]
Advances [Table Text Block]	Table 3.1 - Advances Outstanding by Year of Contractual Maturity (dollars in thousands) September 30, 2024 December 31, 2023 Amount Weighted Amount Weighted Overdrawn demand-deposit accounts $ 5,013 5.23 % $ 5,909 5.76 % Due in one year or less 25,315,411 4.91 21,829,742 5.25 Due after one year through two years 5,509,786 4.35 9,069,939 4.53 Due after two years through three years 3,373,686 4.21 3,306,934 4.02 Due after three years through four years 3,330,861 3.54 2,295,317 4.37 Due after four years through five years 2,509,574 3.97 3,905,361 3.52 Due after five years through fifteen years 1,898,815 3.42 1,601,794 3.26 Thereafter 44,152 1.74 51,660 1.72 Total par value 41,987,298 4.55 % 42,066,656 4.71 % Discounts (36,556) (37,289) Fair value of bifurcated derivatives (1) — 790 Fair value hedging adjustments 56,064 (71,574) Total (2) $ 42,006,806 $ 41,958,583 _________________________ (1) At December 31, 2023, we had certain advances with embedded features that met the requirements to be separated from the host contract and designated those embedded features as stand-alone derivatives. (2) Excludes accrued interest receivable Table 3.2 - Advances Outstanding by Year of Contractual Maturity or Next Call Date (dollars in thousands) September 30, 2024 December 31, 2023 Overdrawn demand-deposit accounts $ 5,013 $ 5,909 Due in one year or less 27,073,306 26,546,662 Due after one year through two years 4,617,222 5,272,439 Due after two years through three years 2,789,655 2,989,434 Due after three years through four years 3,296,937 1,711,697 Due after four years through five years 2,356,311 3,887,061 Due after five years through fifteen years 1,804,702 1,601,794 Thereafter 44,152 51,660 Total par value $ 41,987,298 $ 42,066,656 Table 3.3 - Advances Outstanding by Year of Contractual Maturity or Next Put Date (dollars in thousands) September 30, 2024 December 31, 2023 Overdrawn demand-deposit accounts $ 5,013 $ 5,909 Due in one year or less 32,220,332 27,338,812 Due after one year through two years 4,144,986 8,472,939 Due after two years through three years 1,960,065 1,996,364 Due after three years through four years 2,074,861 1,447,317 Due after four years through five years 700,574 1,955,361 Due after five years through fifteen years 837,315 798,294 Thereafter 44,152 51,660 Total par value $ 41,987,298 $ 42,066,656 Table 3.4 - Advances by Current Interest Rate Terms (dollars in thousands) September 30, 2024 December 31, 2023 Fixed-rate $ 35,332,343 $ 36,330,552 Variable-rate 6,654,955 5,736,104 Total par value $ 41,987,298 $ 42,066,656

Mortgage Loans Held for Portf_2

Mortgage Loans Held for Portfolio (Tables)	9 Months Ended
	Sep. 30, 2024
Receivables [Abstract]
Mortgage Loans Held for Portfolio [Table Text Block]	Table 4.1 - Mortgage Loans Held for Portfolio (dollars in thousands) September 30, 2024 December 31, 2023 Real estate Fixed-rate 15-year single-family mortgages $ 165,130 $ 192,104 Fixed-rate 20- and 30-year single-family mortgages 3,338,564 2,831,319 Premiums 44,700 39,990 Discounts (3,153) (2,222) Deferred derivative gains, net 519 140 Total mortgage loans held for portfolio (1) 3,545,760 3,061,331 Less: allowance for credit losses (2,200) (2,000) Total mortgage loans, net of allowance for credit losses $ 3,543,560 $ 3,059,331 ________________________ (1) Excludes accrued interest receivable Table 4.2 - Mortgage Loans Held for Portfolio by Collateral/Guarantee Type (dollars in thousands) September 30, 2024 December 31, 2023 Conventional mortgage loans $ 3,366,023 $ 2,877,109 Government mortgage loans 137,671 146,314 Total par value $ 3,503,694 $ 3,023,423
Financing Receivable Credit Quality Indicators [Table Text Block]	Table 4.3 - Credit Quality Indicator for Conventional Mortgage Loans (dollars in thousands) September 30, 2024 Year of Origination Payment Status at Amortized Cost (1) Prior to 2020 2020 to 2024 Total Past due 30-59 days delinquent $ 12,728 $ 7,509 $ 20,237 Past due 60-89 days delinquent 3,395 1,769 5,164 Past due 90 days or more delinquent 5,179 1,131 6,310 Total past due 21,302 10,409 31,711 Total current loans 1,324,869 2,049,094 3,373,963 Total conventional mortgage loans $ 1,346,171 $ 2,059,503 $ 3,405,674 December 31, 2023 Year of Origination Payment Status at Amortized Cost (1) Prior to 2019 2019 to 2023 Total Past due 30-59 days delinquent $ 9,392 $ 5,630 $ 15,022 Past due 60-89 days delinquent 3,068 1,694 4,762 Past due 90 days or more delinquent 6,841 889 7,730 Total past due 19,301 8,213 27,514 Total current loans 1,169,734 1,715,134 2,884,868 Total conventional mortgage loans $ 1,189,035 $ 1,723,347 $ 2,912,382 _________________________
Amortized Cost/Recorded Investment in Delinquent Mortgage Loans [Table Text Block]	Table 4.4 - Other Delinquency Statistics of Mortgage Loans (dollars in thousands) September 30, 2024 Amortized Cost in Conventional Mortgage Loans Amortized Cost in Government Mortgage Loans Total In process of foreclosure (1) $ 1,016 $ 925 $ 1,941 Serious delinquency rate (2) 0.19 % 1.39 % 0.23 % Past due 90 days or more still accruing interest $ — $ 1,945 $ 1,945 Loans on nonaccrual status (3) $ 6,445 $ — $ 6,445 December 31, 2023 Amortized Cost in Conventional Mortgage Loans Amortized Cost in Government Mortgage Loans Total In process of foreclosure (1) $ 1,742 $ 623 $ 2,365 Serious delinquency rate (2) 0.27 % 0.94 % 0.30 % Past due 90 days or more still accruing interest $ — $ 1,356 $ 1,356 Loans on nonaccrual status (3) $ 7,913 $ — $ 7,913 _______________________ (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 amortized cost of the total loan portfolio class. (3) As of September 30, 2024, and December 31, 2023, $3.4 million and $4.3 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 4.5 presents a roll forward of the allowance for credit losses on conventional mortgage loans for the three and nine months ended September 30, 2024 and 2023. Table 4.5 - Allowance for Credit Losses on Conventional Mortgage Loans (dollars in thousands) For the Three Months Ended September 30, For the Nine Months Ended September 30, 2024 2023 2024 2023 Allowance for credit losses (1) Balance, beginning of period $ 2,200 $ 2,000 $ 2,000 $ 1,900 Net recoveries 4 8 4 15 (Reduction of) provision for credit losses (4) (8) 196 85 Balance, end of period $ 2,200 $ 2,000 $ 2,200 $ 2,000 _________________________ (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)	9 Months Ended
	Sep. 30, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Value of Derivative Instruments [Table Text Block]	Table 5.1 - Fair Value of Derivative Instruments (dollars in thousands) September 30, 2024 December 31, 2023 Notional Derivative Derivative Notional Derivative Derivative Derivatives designated as hedging instruments Interest-rate swaps $ 50,587,956 $ 86,842 $ (685,517) $ 51,587,480 $ 77,093 $ (1,009,217) Forward-start interest-rate swaps 941,000 1,094 (1,550) 1,391,000 254 (170) Total derivatives designated as hedging instruments 51,528,956 87,936 (687,067) 52,978,480 77,347 (1,009,387) Derivatives not designated as hedging instruments Interest-rate swaps 1,641,043 — (236) 90,000 — (729) Mortgage-delivery commitments (1) 69,710 108 (155) 29,995 290 — Total derivatives not designated as hedging instruments 1,710,753 108 (391) 119,995 290 (729) Total notional amount of derivatives $ 53,239,709 $ 53,098,475 Total derivatives before netting and collateral adjustments 88,044 (687,458) 77,637 (1,010,116) Netting adjustments and cash collateral, including related accrued interest (2) 267,379 680,614 305,436 1,007,099 Derivative assets and derivative liabilities $ 355,423 $ (6,844) $ 383,073 $ (3,017) _______________________ (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 $952.4 million and $1.3 billion at September 30, 2024, and December 31, 2023, respectively. The change in cash collateral posted is included in the net change in interest-bearing deposits in the statement of cash flows. Cash collateral received, including accrued interest, was $4.4 million and $3.8 million at September 30, 2024, and December 31, 2023.
Net Gains (Losses) on Derivatives and Hedging Activities [Table Text Block]	Tables 5.2 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 5.2 - Net Gains (Losses) on Fair Value Hedging Relationships (dollars in thousands) For the Three Months Ended September 30, 2024 Advances Available-for-sale Securities CO Bonds Total interest income (expense) presented on the statements of operations $ 535,200 $ 234,545 $ (567,157) Gains (losses) on fair value hedging relationships Changes in fair value: Derivatives $ (212,219) $ (381,278) $ 358,310 Hedged items 208,913 375,947 (358,256) Net changes in fair value before price alignment interest (3,306) (5,331) 54 Price alignment interest (1) (2,204) (10,679) 416 Net interest settlements on derivatives (2)(3) 56,387 122,394 (151,214) Net gains (losses) on qualifying hedging relationships 50,877 106,384 (150,744) Amortization/accretion of discontinued hedging relationships (166) — (847) Net gains (losses) on derivatives and hedging activities recorded in net interest income $ 50,711 $ 106,384 $ (151,591) For the Three Months Ended September 30, 2023 Advances Available-for-sale Securities CO Bonds Total interest income (expense) presented on the statements of operations $ 486,508 $ 214,392 $ (477,389) Gains (losses) on fair value hedging relationships Changes in fair value: Derivatives $ 32,714 $ 144,001 $ (2,046) Hedged items (32,778) (144,300) 3,198 Net changes in fair value before price alignment interest (64) (299) 1,152 Price alignment interest (1) (2,771) (15,008) 332 Net interest settlements on derivatives (2)(3) 53,399 125,784 (170,493) Net gains (losses) on qualifying hedging relationships 50,564 110,477 (169,009) Amortization/accretion of discontinued hedging relationships (366) — (1,463) Net gains (losses) on derivatives and hedging activities recorded in net interest income $ 50,198 $ 110,477 $ (170,472) For the Nine Months Ended September 30, 2024 Advances Available-for-sale Securities CO Bonds Total interest income (expense) presented on the statements of operations $ 1,615,872 $ 707,504 $ (1,609,188) Gains (losses) on fair value hedging relationships Changes in fair value: Derivatives $ (104,427) $ (280,496) $ 396,862 Hedged items 103,489 278,177 (397,515) Net changes in fair value before price alignment interest (938) (2,319) (653) Price alignment interest (1) (4,075) (40,184) 1,302 Net interest settlements on derivatives (2)(3) 172,692 371,440 (470,450) Net gains (losses) on qualifying hedging relationships 167,679 328,937 (469,801) Amortization/accretion of discontinued hedging relationships (813) — (3,550) Net gains (losses) on derivatives and hedging activities recorded in net interest income $ 166,866 $ 328,937 $ (473,351) For the Nine Months Ended September 30, 2023 Advances Available-for-sale Securities CO Bonds Total interest income (expense) presented on the statements of operations $ 1,587,597 $ 590,767 $ (1,349,479) Gains (losses) on fair value hedging relationships Changes in fair value: Derivatives $ 52,677 $ 120,049 $ 79,608 Hedged items (52,407) (123,228) (78,646) Net changes in fair value before price alignment interest 270 (3,179) 962 Price alignment interest (1) (6,354) (35,365) 872 Net interest settlements on derivatives (2)(3) 125,370 337,838 (468,235) Net gains (losses) on qualifying hedging relationships 119,286 299,294 (466,401) Amortization/accretion of discontinued hedging relationships (1,349) — (621) Net gains (losses) on derivatives and hedging activities recorded in net interest income $ 117,937 $ 299,294 $ (467,022) _______________________ (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. Table 5.3 presents the net gains (losses) on qualifying cash flow hedging relationships. Table 5.3 - Net (Losses) Gains on Cash Flow Hedging Relationships (dollars in thousands) For the Three Months Ended September 30, For the Nine Months Ended September 30, 2024 2023 2024 2023 Forward-start interest rate swaps - CO Bonds Gains (losses) reclassified from accumulated other comprehensive loss into interest expense $ 1,314 $ (1,130) $ (39) $ (3,374) (Losses) gains recognized in other comprehensive income (18,767) 22,950 3,592 25,497
Gains (Losses) By Type of Hedged Item [Table Text Block]	Table 5.4 - Cumulative Basis Adjustments for Fair-Value Hedges (dollars in thousands) September 30, 2024 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 $ 14,612,292 $ 51,014 $ 5,050 $ 56,064 Available-for-sale securities 11,184,356 608,767 — 608,767 Consolidated obligation bonds 23,599,942 (496,541) 35,153 (461,388) _______________________ (1) Includes only the amortized cost of hedged items in fair-value hedging relationships.
Impact of Variation Margin for Cleared Derivatives on the Statement of Cash Flows [Table Text Block]	Table 5.5 - Impact of Variation Margin for Cleared Derivatives on the Statement of Cash Flows (dollars in thousands) Increase (decrease) on Cash Flow Statement For the Nine Months Ended September 30, 2024 2023 Operating activity - net change in derivatives and hedging activities $ (310,209) $ 400,260 Financing activity - net receipts on derivatives with a financing element 1,619 50,123 Total variation margin (paid) received on cleared derivatives $ (308,590) $ 450,383
Post-haircut Value of Incremental Collateral Based on Incremental Credit Rating Downgrades [Table Text Block]	Table 5.6 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 September 30, 2024. Table 5.6 - Post Haircut Value of Incremental Collateral to be Delivered as of September 30, 2024 (dollars in thousands) Ratings Downgrade (1) From To Incremental Collateral AA+ AA or AA- $ — AA- A+, A or A- — A- below A- 69,734 _______________________ (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 5.7 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 September 30, 2024, and December 31, 2023, which includes cleared and uncleared interest rate swaps, and the fair value of derivatives that are not subject to such netting, which includes mortgage delivery commitments and CO bond firm commitments. Derivatives subject to netting include any related cash collateral received from or pledged to counterparties. Table 5.7 - Netting of Derivative Assets and Derivative Liabilities (dollars in thousands) September 30, 2024 Derivative Instruments Meeting Netting Requirements Gross Recognized Amount Gross Amounts of Netting Adjustments and Cash Collateral Derivative Instruments Not Meeting Netting Requirements Total Derivative Assets and Total Derivative Liabilities Derivative Assets Interest-rate swaps Uncleared $ 50,281 $ (42,958) $ 7,323 Cleared 37,655 310,337 347,992 Mortgage delivery commitments $ 108 108 Total $ 355,423 Derivative Liabilities Interest-rate swaps Uncleared $ (677,371) $ 670,682 $ (6,689) Cleared (9,931) 9,931 — Mortgage delivery commitments $ (155) (155) Total $ (6,844) December 31, 2023 Derivative Instruments Meeting Netting Requirements Gross Recognized Amount Gross Amounts of Netting Adjustments and Cash Collateral Derivative Instruments Not Meeting Netting Requirements Total Derivative Assets and Total Derivative Liabilities Derivative Assets Interest-rate swaps Uncleared $ 72,517 $ (69,838) $ 2,679 Cleared 4,830 375,274 380,104 Mortgage delivery commitment $ 290 290 Total $ 383,073 Derivative Liabilities Interest-rate swaps Uncleared $ (997,974) $ 994,957 $ (3,017) Cleared (12,142) 12,142 — Total $ (3,017)
Offsetting Liabilities [Table Text Block]	Table 5.7 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 September 30, 2024, and December 31, 2023, which includes cleared and uncleared interest rate swaps, and the fair value of derivatives that are not subject to such netting, which includes mortgage delivery commitments and CO bond firm commitments. Derivatives subject to netting include any related cash collateral received from or pledged to counterparties. Table 5.7 - Netting of Derivative Assets and Derivative Liabilities (dollars in thousands) September 30, 2024 Derivative Instruments Meeting Netting Requirements Gross Recognized Amount Gross Amounts of Netting Adjustments and Cash Collateral Derivative Instruments Not Meeting Netting Requirements Total Derivative Assets and Total Derivative Liabilities Derivative Assets Interest-rate swaps Uncleared $ 50,281 $ (42,958) $ 7,323 Cleared 37,655 310,337 347,992 Mortgage delivery commitments $ 108 108 Total $ 355,423 Derivative Liabilities Interest-rate swaps Uncleared $ (677,371) $ 670,682 $ (6,689) Cleared (9,931) 9,931 — Mortgage delivery commitments $ (155) (155) Total $ (6,844) December 31, 2023 Derivative Instruments Meeting Netting Requirements Gross Recognized Amount Gross Amounts of Netting Adjustments and Cash Collateral Derivative Instruments Not Meeting Netting Requirements Total Derivative Assets and Total Derivative Liabilities Derivative Assets Interest-rate swaps Uncleared $ 72,517 $ (69,838) $ 2,679 Cleared 4,830 375,274 380,104 Mortgage delivery commitment $ 290 290 Total $ 383,073 Derivative Liabilities Interest-rate swaps Uncleared $ (997,974) $ 994,957 $ (3,017) Cleared (12,142) 12,142 — Total $ (3,017)

Deposits (Tables)

Deposits (Tables)	9 Months Ended
	Sep. 30, 2024
Deposits [Abstract]
Interest-bearing and Non-interest-bearing Deposits [Table Text Block]	Table 6.1 - Deposits (dollars in thousands) September 30, 2024 December 31, 2023 Interest-bearing Demand and overnight $ 728,197 $ 896,005 Noninterest-bearing Other 37,634 26,874 Total deposits $ 765,831 $ 922,879

Consolidated Obligations (Table

Consolidated Obligations (Tables)	9 Months Ended
	Sep. 30, 2024
Debt Disclosure [Abstract]
CO Bonds by Year of Contractual Maturity [Table Text Block]	Table 7.1 - CO Bonds Outstanding by Contractual Maturity (dollars in thousands) September 30, 2024 December 31, 2023 Amount Weighted Average Rate (1) Amount Weighted Average Rate (1) Due in one year or less $ 32,036,475 4.31 % $ 17,841,615 4.27 % Due after one year through two years 8,169,250 2.36 7,476,350 2.86 Due after two years through three years 4,123,300 2.92 7,014,955 1.76 Due after three years through four years 3,326,480 3.22 2,854,250 2.94 Due after four years through five years 1,884,515 3.87 2,712,400 2.94 Thereafter 3,247,820 3.38 3,193,305 2.95 Total par value 52,787,840 3.76 % 41,092,875 3.30 % Premiums 25,831 32,419 Discounts (13,693) (14,451) Hedging adjustments (461,388) (862,100) Total $ 52,338,590 $ 40,248,743 _______________________ (1) The CO bonds' weighted-average rate excludes concession fees. Table 7.3 - CO Bonds Outstanding by Contractual Maturity or Next Call Date (dollars in thousands) September 30, 2024 December 31, 2023 Due in one year or less $ 43,735,675 $ 30,900,615 Due after one year through two years 3,789,250 4,203,850 Due after two years through three years 1,441,100 2,487,955 Due after three years through four years 1,606,480 852,750 Due after four years through five years 789,515 1,171,400 Thereafter 1,425,820 1,476,305 Total par value $ 52,787,840 $ 41,092,875
CO Bonds Long-term Debt Instruments [Table Text Block]	Table 7.2 - CO Bonds Outstanding by Early Redemption Feature (dollars in thousands) September 30, 2024 December 31, 2023 Noncallable and nonputable $ 33,537,640 $ 18,882,235 Callable 19,250,200 22,210,640 Total par value $ 52,787,840 $ 41,092,875 Table 7.4 - CO Bonds by Interest Rate-Payment Type (dollars in thousands) September 30, 2024 December 31, 2023 Fixed-rate $ 31,437,840 $ 32,454,235 Simple variable-rate 16,253,000 3,012,500 Step-up (1) 5,097,000 5,626,140 Total par value $ 52,787,840 $ 41,092,875 _______________________ (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]	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 7.5 - CO Discount Notes Outstanding (dollars in thousands) Book Value Par Value Weighted Average Rate (1) September 30, 2024 $ 14,941,067 $ 15,030,861 5.11 % December 31, 2023 $ 22,000,546 $ 22,150,970 5.31 % _______________________ (1) CO discount notes' weighted-average rate represents a yield to maturity excluding concession fees.

Affordable Housing Program (Tab

Affordable Housing Program (Tables)	9 Months Ended
	Sep. 30, 2024
Affordable Housing Program AHP [Abstract]
Roll-forward of the AHP Liability[Table Text Block]	Table 8.1 - AHP Liability (dollars in thousands) September 30, 2024 December 31, 2023 Balance at beginning of year $ 87,164 $ 76,622 AHP expense for the period 23,193 28,648 AHP voluntary contribution 1,852 2,000 AHP direct grant disbursements (14,132) (16,144) AHP subsidy for AHP advance disbursements (998) (3,965) Return of previously disbursed grants and subsidies 302 3 Balance at end of period $ 97,381 $ 87,164

Capital (Tables)

Capital (Tables)	9 Months Ended
	Sep. 30, 2024
Banking Regulation, Total Capital [Abstract]
Compliance with Regulatory Capital Requirements [Table Text Block]	Table 9.1 - Regulatory Capital Requirements (dollars in thousands) September 30, 2024 December 31, 2023 Required Actual Required Actual Risk-based capital $ 589,241 $ 4,040,103 $ 628,052 $ 3,839,236 Regulatory capital $ 2,895,874 $ 4,040,103 $ 2,685,691 $ 3,839,236 Capital-to-asset ratio 4.0 % 5.6 % 4.0 % 5.7 % Leverage capital $ 3,619,842 $ 6,060,155 $ 3,357,114 $ 5,758,854 Leverage capital-to-assets ratio 5.0 % 8.4 % 5.0 % 8.6 %
Mandatorily redeemable capital stock [Table Text Block]	Table 9.2 - Mandatorily Redeemable Capital Stock by Expiry of Redemption Notice Period (dollars in thousands) September 30, 2024 December 31, 2023 Past redemption date (1) $ 2,669 $ 2,778 Due in one year or less 435 — Due after one year through two years 689 435 Due after two years through three years 960 689 Due after three years through four years 333 960 Due after four years through five years — 1,221 Total $ 5,086 $ 6,083 _______________________ (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)	9 Months Ended
	Sep. 30, 2024
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Schedule of Accumulated Other Comprehensive Loss [Table Text Block]	Accumulated Other Comprehensive Income (Loss) Table 10.1 - Accumulated Other Comprehensive Income (Loss) (dollars in thousands) Net Unrealized Gain (Loss) on Available-for-sale Securities Net Unrealized Gain (Loss) Relating to Hedging Activities Pension and Postretirement Benefits Total Accumulated Other Comprehensive Gain (Loss) Balance, June 30, 2023 $ (340,077) $ 47,273 $ 1,119 $ (291,685) Other comprehensive (loss) income before reclassifications: Net unrealized (losses) gains (58,738) 22,950 — (35,788) Net actuarial loss — — (122) (122) Reclassifications from other comprehensive income to net income Amortization - hedging activities (1) — 1,130 — 1,130 Other comprehensive (loss) income (58,738) 24,080 (122) (34,780) Balance, September 30, 2023 $ (398,815) $ 71,353 $ 997 $ (326,465) Balance, June 30, 2024 $ (338,781) $ 69,676 $ 598 $ (268,507) Other comprehensive (loss) income before reclassifications: Net unrealized gains (losses) 61,005 (18,767) — 42,238 Net actuarial loss — — (76) (76) Reclassifications from other comprehensive income to net income Amortization - hedging activities (1) — (1,314) — (1,314) Other comprehensive income (loss) 61,005 (20,081) (76) 40,848 Balance, September 30, 2024 $ (277,776) $ 49,595 $ 522 $ (227,659) Balance, December 31, 2022 $ (350,281) $ 42,482 $ 1,374 $ (306,425) Other comprehensive (loss) income before reclassifications: Net unrealized (losses) gains (48,534) 25,497 — (23,037) Net actuarial loss — — (377) (377) Reclassifications from other comprehensive income to net income Amortization - hedging activities (1) — 3,374 — 3,374 Other comprehensive (loss) income (48,534) 28,871 (377) (20,040) Balance, September 30, 2023 $ (398,815) $ 71,353 $ 997 $ (326,465) Balance, December 31, 2023 $ (341,252) $ 45,964 $ 749 $ (294,539) Other comprehensive income (loss) before reclassifications: Net unrealized gains 63,476 3,592 — 67,068 Net actuarial loss — — (227) (227) Reclassifications from other comprehensive income to net income Amortization - hedging activities (1) — 39 — 39 Other comprehensive income (loss) 63,476 3,631 (227) 66,880 Balance, September 30, 2024 $ (277,776) $ 49,595 $ 522 $ (227,659) _______________________ (1) Recorded in CO bond interest expense.

Fair Values (Tables)

Fair Values (Tables)	9 Months Ended
	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments [Table Text Block]	Table 11.1 presents the carrying value, fair value, and fair value hierarchy of our financial assets and liabilities at September 30, 2024, and December 31, 2023. 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 at fair value on a non-recurring basis. We record all other financial assets and liabilities at amortized cost. Refer to Table 11.2 for further details about the financial assets and liabilities held at fair value on either a recurring or non-recurring basis. Table 11.1 - Fair Value Summary (dollars in thousands) September 30, 2024 Carrying Total Fair Value Level 1 Level 2 Level 3 Netting Adjustments and Cash Collateral (2) Financial instruments Assets: Cash and due from banks $ 50,242 $ 50,242 $ 50,242 $ — $ — $ — Interest-bearing deposits 1,809,628 1,809,628 1,809,628 — — — Securities purchased under agreements to resell 2,750,000 2,750,001 — 2,750,001 — — Federal funds sold 4,585,000 4,584,997 — 4,584,997 — — Trading securities (1) 1,496 1,496 — 1,496 — — Available-for-sale securities (1) 16,925,261 16,925,261 — 16,903,870 21,391 — Held-to-maturity securities 66,439 66,475 — 66,475 — — Advances 42,006,806 41,988,285 — 41,988,285 — — Mortgage loans, net 3,543,560 3,354,085 — 3,341,656 12,429 — Accrued interest receivable 223,195 223,195 — 223,195 — — Derivative assets (1) 355,423 355,423 — 88,044 — 267,379 Other assets (1) 32,874 32,874 16,489 16,385 — — Liabilities: Deposits (765,831) (765,807) — (765,807) — — COs: Bonds (52,338,590) (52,205,575) — (52,205,575) — — Discount notes (14,941,067) (14,946,443) — (14,946,443) — — Mandatorily redeemable capital stock (5,086) (5,086) (5,086) — — — Accrued interest payable (361,110) (361,110) — (361,110) — — Derivative liabilities (1) (6,844) (6,844) — (687,458) — 680,614 Other: Commitments to extend credit for advances — (267) — (267) — — Standby letters of credit (1,526) (1,526) — (1,526) — — December 31, 2023 Carrying Total Fair Level 1 Level 2 Level 3 Netting Adjustments and Cash Collateral (2) Financial instruments Assets: Cash and due from banks $ 53,412 $ 53,412 $ 53,412 $ — $ — $ — Interest-bearing deposits 1,643,587 1,643,587 1,643,587 — — — Securities purchased under agreements to resell 1,600,000 1,599,996 — 1,599,996 — — Federal funds sold 2,500,000 2,499,995 — 2,499,995 — — Trading securities (1) 1,395 1,395 — 1,395 — — Available-for-sale securities (1) 15,343,745 15,343,745 — 15,321,940 21,805 — Held-to-maturity securities 78,905 78,478 — 78,478 — — Advances 41,958,583 41,834,762 — 41,834,762 — — Mortgage loans, net 3,059,331 2,796,000 — 2,781,976 14,024 — Accrued interest receivable 185,709 185,709 — 185,709 — — Derivative assets (1) 383,073 383,073 — 77,637 — 305,436 Other assets (1) 28,369 28,369 13,724 14,645 — — Liabilities: Deposits (922,879) (922,830) — (922,830) — — COs: Bonds (40,248,743) (39,887,287) — (39,887,287) — — Discount notes (22,000,546) (21,998,576) — (21,998,576) — — Mandatorily redeemable capital stock (6,083) (6,083) (6,083) — — — Accrued interest payable (269,517) (269,517) — (269,517) — — Derivative liabilities (1) (3,017) (3,017) — (1,010,116) — 1,007,099 Other: Commitments to extend credit for advances — (2,101) — (2,101) — — Standby letters of credit (1,340) (1,340) — (1,340) — — _______________________ (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 11.2 - Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis (dollars in thousands) September 30, 2024 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 $ — $ 1,496 $ — $ — $ 1,496 Available-for-sale securities: U.S. Treasury obligations — 5,844,132 — — 5,844,132 HFA securities — — 21,391 — 21,391 Supranational institutions — 343,666 — — 343,666 U.S. government-owned corporations — 237,634 — — 237,634 GSE — 100,216 — — 100,216 U.S. government guaranteed – single-family MBS — 206,443 — — 206,443 U.S. government guaranteed – multifamily MBS — 471,494 — — 471,494 GSE – single-family MBS — 2,084,454 — — 2,084,454 GSE – multifamily MBS — 7,615,831 — — 7,615,831 Total available-for-sale securities — 16,903,870 21,391 — 16,925,261 Derivative assets: Interest-rate-exchange agreements — 87,936 — 267,379 355,315 Mortgage delivery commitments — 108 — — 108 Total derivative assets — 88,044 — 267,379 355,423 Other assets 16,489 16,385 — — 32,874 Total assets carried at fair value on a recurring basis $ 16,489 $ 17,009,795 $ 21,391 $ 267,379 $ 17,315,054 Liabilities: Carried at fair value on a recurring basis Derivative liabilities Interest-rate-exchange agreements $ — $ (687,303) $ — $ 680,614 $ (6,689) Mortgage delivery commitments — (155) — — (155) Total liabilities carried at fair value on a recurring basis $ — $ (687,458) $ — $ 680,614 $ (6,844) December 31, 2023 Level 1 Level 2 Level 3 Netting (1) Total Assets: Carried at fair value on a recurring basis Trading securities: Corporate bonds $ — $ 1,395 $ — $ — $ 1,395 Available-for-sale securities: U.S. Treasury obligations — 5,664,452 — — 5,664,452 HFA securities — — 21,805 — 21,805 Supranational institutions — 346,375 — — 346,375 U.S. government-owned corporations — 235,191 — — 235,191 GSE — 99,421 — — 99,421 U.S. government guaranteed – single-family MBS — 14,433 — — 14,433 U.S. government guaranteed – multifamily MBS — 477,676 — — 477,676 GSE – single-family MBS — 904,456 — — 904,456 GSE – multifamily MBS — 7,579,936 — — 7,579,936 Total available-for-sale securities — 15,321,940 21,805 — 15,343,745 Derivative assets: Interest-rate-exchange agreements — 77,347 — 305,436 382,783 Mortgage delivery commitments — 290 — — 290 Total derivative assets — 77,637 — 305,436 383,073 Other assets 13,724 14,645 — — 28,369 Total assets carried at fair value on a recurring basis $ 13,724 $ 15,415,617 $ 21,805 $ 305,436 $ 15,756,582 Liabilities: Carried at fair value on a recurring basis Derivative liabilities Interest-rate-exchange agreements $ — $ (1,010,116) $ — $ 1,007,099 $ (3,017) Total liabilities carried at fair value on a recurring basis $ — $ (1,010,116) $ — $ 1,007,099 $ (3,017) _______________________ (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.
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]	Table 11.3 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 three and nine months ended September 30, 2024 and 2023. Table 11.3 - Roll Forward of Level 3 Available-for-Sale HFA Securities (dollars in thousands) For the Three Months Ended September 30, For the Nine Months Ended September 30, 2024 2023 2024 2023 Balance at beginning of period $ 21,174 $ 32,391 $ 21,805 $ 32,774 Total gains included in other comprehensive income Net unrealized gains 217 298 556 825 Sales, maturities, and settlements Settlements — — (970) (910) Balance at end of period $ 21,391 $ 32,689 $ 21,391 $ 32,689 Total amount of unrealized gains for the period included in other comprehensive income relating to securities held at period end $ 217 $ 298 $ 556 $ 825

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Off-Balance Sheet Commitments [Table Text Block]	Table 12.1 - Off-Balance Sheet Commitments (1) (dollars in thousands) September 30, 2024 December 31, 2023 Expire within one year Expire after one year Total Expire within one year Expire after one year Total Standby letters of credit outstanding (2) $ 8,460,340 $ 314,262 $ 8,774,602 $ 8,217,388 $ 207,677 $ 8,425,065 Commitments for unused lines of credit - advances (3) 1,102,651 — 1,102,651 1,113,354 — 1,113,354 Commitments to make additional advances 21,350 12,263 33,613 13,170 20,463 33,633 Commitments to invest in mortgage loans 69,710 — 69,710 29,995 — 29,995 Unsettled CO bonds, at par 98,000 — 98,000 131,500 — 131,500 Unsettled CO discount notes, at par — — — 61,008 — 61,008 __________________________ (1) We have determined that it is unnecessary to record any liability for credit losses on these agreements based on our credit extension and collateral policies. (2) The amount of standby letters of credit outstanding excludes commitments to issue standby letters of credit. At September 30, 2024, and December 31, 2023, commitments to issue standby letters of credit that expire within one year totaled $47.9 million and $16.0 million, respectively, and at December 31, 2023, commitments to issue standby letters of credit that expire after one year totaled $13.1 million. (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)	9 Months Ended
	Sep. 30, 2024
Transactions with Shareholders [Abstract]
Schedule of Transactions with Shareholders, Shareholder Concentrations Balance Sheet [Table Text Block]	Table 13.1 - Shareholder Concentrations, Balance Sheet (dollars in thousands) Capital Stock Percent Par Percent of Total Par Value Total Accrued Percent of Total September 30, 2024 State Street Bank and Trust Company $ 335,000 15.5 % $ 6,000,000 14.3 % $ 39,102 25.0 %
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 13.2 - Transactions with Directors' Institutions (dollars in thousands) Capital Stock Percent Par Percent of Total Par Value Total Accrued Percent of Total September 30, 2024 $ 49,352 2.3 % $ 677,825 1.6 % $ 869 0.6 % December 31, 2023 201,250 9.8 4,485,824 10.7 5,953 5.2

Investments Trading Securities

Investments Trading Securities by Major Security Type (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Corporate bonds [Member]
Debt and Equity Securities, FV-NI [Line Items]
Trading securities	$ 1,496	$ 1,395

Available-for-Sale Securities M

Available-for-Sale Securities Major Security Types (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	[1]	$ 17,203,037	$ 15,684,997
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Income		14,537	5,307
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Income		(292,313)	(346,559)
Available-for-sale securities Fair Value		16,925,261	15,343,745
Available-for-sale securities - accrued interest receivable		$ 39,100	$ 46,700
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]	$ 5,856,446	$ 5,684,157
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Income		363	122
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Income		(12,677)	(19,827)
Available-for-sale securities Fair Value		5,844,132	5,664,452
State housing-finance-agency obligations (HFA securities) [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	[1]	21,460	22,430
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Income		9	0
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Income		(78)	(625)
Available-for-sale securities Fair Value		21,391	21,805
Supranational institutions [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	[1]	347,068	350,282
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Income		17	3
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Income		(3,419)	(3,910)
Available-for-sale securities Fair Value		343,666	346,375
U.S. government-owned corporations [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	[1]	253,228	252,585
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Income		0	0
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Income		(15,594)	(17,394)
Available-for-sale securities Fair Value		237,634	235,191
GSE [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	[1]	104,044	104,015
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Income		0	0
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Income		(3,828)	(4,594)
Available-for-sale securities Fair Value		100,216	99,421
Other Than MBS [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	[1]	6,582,246	6,413,469
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Income		389	125
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Income		(35,596)	(46,350)
Available-for-sale securities Fair Value		6,547,039	6,367,244
U.S. government guaranteed - single-family MBS [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	[1]	207,989	16,854
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Income		372	0
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Income		(1,918)	(2,421)
Available-for-sale securities Fair Value		206,443	14,433
U.S. government guaranteed-multifamily MBS [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	[1]	512,346	521,203
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Income		0	0
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Income		(40,852)	(43,527)
Available-for-sale securities Fair Value		471,494	477,676
MBS [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	[1]	10,620,791	9,271,528
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Income		14,148	5,182
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Income		(256,717)	(300,209)
Available-for-sale securities Fair Value		10,378,222	8,976,501
Single Family [Member] | GSE – MBS [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	[1]	2,117,517	954,298
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Income		5,726	1,665
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Income		(38,789)	(51,507)
Available-for-sale securities Fair Value		2,084,454	904,456
Multifamily [Member] | GSE – MBS [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	[1]	7,782,939	7,779,173
Unrealized Gains Amounts Recorded in Accumulated Other Comprehensive Income		8,050	3,517
Unrealized Losses Amounts Recorded in Accumulated Other Comprehensive Income		(175,158)	(202,754)
Available-for-sale securities Fair Value		$ 7,615,831	$ 7,579,936
[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	Sep. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	$ 1,680,902	$ 3,241,533
Less than 12 Months, Unrealized Losses	(2,075)	(4,703)
12 Months or More, Fair Value	10,204,385	10,336,252
12 Months or More, Unrealized Losses	(290,238)	(341,856)
Total Fair Value	11,885,287	13,577,785
Total Unrealized Losses	(292,313)	(346,559)
US Treasury Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	1,189,830	1,865,124
Less than 12 Months, Unrealized Losses	(815)	(1,405)
12 Months or More, Fair Value	3,193,324	3,319,996
12 Months or More, Unrealized Losses	(11,862)	(18,422)
Total Fair Value	4,383,154	5,185,120
Total Unrealized Losses	(12,677)	(19,827)
HFA securities [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	13,742	21,805
12 Months or More, Unrealized Losses	(78)	(625)
Total Fair Value	13,742	21,805
Total Unrealized Losses	(78)	(625)
Supranational institutions [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	0	82,354
Less than 12 Months, Unrealized Losses	0	(188)
12 Months or More, Fair Value	331,252	251,452
12 Months or More, Unrealized Losses	(3,419)	(3,722)
Total Fair Value	331,252	333,806
Total Unrealized Losses	(3,419)	(3,910)
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	237,634	235,191
12 Months or More, Unrealized Losses	(15,594)	(17,394)
Total Fair Value	237,634	235,191
Total Unrealized Losses	(15,594)	(17,394)
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	100,216	99,421
12 Months or More, Unrealized Losses	(3,828)	(4,594)
Total Fair Value	100,216	99,421
Total Unrealized Losses	(3,828)	(4,594)
Other Than MBS [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	1,189,830	1,947,478
Less than 12 Months, Unrealized Losses	(815)	(1,593)
12 Months or More, Fair Value	3,876,168	3,927,865
12 Months or More, Unrealized Losses	(34,781)	(44,757)
Total Fair Value	5,065,998	5,875,343
Total Unrealized Losses	(35,596)	(46,350)
U.S. government guaranteed - single-family MBS [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	13,527	14,433
12 Months or More, Unrealized Losses	(1,918)	(2,421)
Total Fair Value	13,527	14,433
Total Unrealized Losses	(1,918)	(2,421)
U.S. government guaranteed-multifamily MBS [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	471,494	477,676
12 Months or More, Unrealized Losses	(40,852)	(43,527)
Total Fair Value	471,494	477,676
Total Unrealized Losses	(40,852)	(43,527)
MBS [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	491,072	1,294,055
Less than 12 Months, Unrealized Losses	(1,260)	(3,110)
12 Months or More, Fair Value	6,328,217	6,408,387
12 Months or More, Unrealized Losses	(255,457)	(297,099)
Total Fair Value	6,819,289	7,702,442
Total Unrealized Losses	(256,717)	(300,209)
Single Family [Member] | GSE – MBS [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	177,641	55,457
Less than 12 Months, Unrealized Losses	(88)	(117)
12 Months or More, Fair Value	540,481	616,857
12 Months or More, Unrealized Losses	(38,701)	(51,390)
Total Fair Value	718,122	672,314
Total Unrealized Losses	(38,789)	(51,507)
Multifamily [Member] | GSE – MBS [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	313,431	1,238,598
Less than 12 Months, Unrealized Losses	(1,172)	(2,993)
12 Months or More, Fair Value	5,302,715	5,299,421
12 Months or More, Unrealized Losses	(173,986)	(199,761)
Total Fair Value	5,616,146	6,538,019
Total Unrealized Losses	$ (175,158)	$ (202,754)

Available-for-Sale Securities b

Available-for-Sale Securities by Contractual Maturity (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	[1]	$ 17,203,037	$ 15,684,997
Fair Value		16,925,261	15,343,745
Other Than MBS [Member]
Debt Securities, Available-for-sale [Line Items]
Due in one year or less, amortized cost		1,246,798	13,820
Due in one year or less, fair value		1,247,046	13,210
Due after one year through five years, amortized cost		5,017,493	6,082,462
Due after one year through five years, fair value		5,001,325	6,058,571
Due after five years through 10 years, amortized cost		0	0
Due after five years through 10 years, fair value		0	0
Due after 10 years, amortized cost		317,955	317,187
Due after 10 years, fair value		298,668	295,463
Amortized Cost	[1]	6,582,246	6,413,469
Fair Value		6,547,039	6,367,244
MBS [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	[1]	10,620,791	9,271,528
Fair Value		10,378,222	8,976,501
Amortized Cost MBS	[2]	10,620,791	9,271,528
Fair Value MBS	[2]	$ 10,378,222	$ 8,976,501
[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		Sep. 30, 2024	Dec. 31, 2023
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity fair value		$ 66,475	$ 78,478
Held-to-maturity securities - accrued interest receivable		$ 389	$ 399
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]	$ 2,861	$ 3,123
Gross Unrecognized Holding Gains		16	19
Gross Unrecognized Holding Losses		0	0
Held-to-maturity fair value		2,877	3,142
GSE – MBS [Member] | Single Family [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	[1]	63,578	75,782
Gross Unrecognized Holding Gains		561	366
Gross Unrecognized Holding Losses		(541)	(812)
Held-to-maturity fair value		63,598	75,336
MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	[1]	66,439	78,905
Gross Unrecognized Holding Gains		577	385
Gross Unrecognized Holding Losses		(541)	(812)
Held-to-maturity fair value		$ 66,475	$ 78,478
[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

Investments Narrative (Details)

Investments Narrative (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
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	2,200		$ 2,000
Net gains on trading securities held at period end	$ 100	$ 37
Available for-Sale securities, rated double-A or above, based on amortized cost	100%		100%
Held -to-maturity securities, rated double-A or above, based on amortized cost	100%		100%
Allowance for credit loss on held-to-maturity securities	$ 0		$ 0
Allowance for credit loss on available-for-sale securities	0		0
Interest Bearing Deposits and Federal Funds Sold [Member]
Allowance for credit loss	$ 0		$ 0

Advances - Outstanding by Year

Advances - Outstanding by Year of Contractual Maturity (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Federal Home Loan Bank, Advances, Maturity, Rolling Year, Par Value [Abstract]
Overdrawn demand-deposit accounts		$ 5,013	$ 5,909
Due in one year or less		25,315,411	21,829,742
Due after one year through two years		5,509,786	9,069,939
Due after two years through three years		3,373,686	3,306,934
Due after three years through four years		3,330,861	2,295,317
Due after four years through five years		2,509,574	3,905,361
Due after five years through fifteen years		1,898,815	1,601,794
Thereafter		44,152	51,660
Total par value		41,987,298	42,066,656
Discounts		(36,556)	(37,289)
Fair value of bifurcated derivatives	[1]	0	790
Fair value hedging adjustments		56,064	(71,574)
Total Advances	[2]	$ 42,006,806	$ 41,958,583
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]		Accrued interest receivable	Accrued interest receivable
Federal Home Loan Bank, Advances, Weighted Average Interest Rate, Rolling Year [Abstract]
Overdrawn demand-deposit accounts, Weighted average rate		5.23%	5.76%
Due in one year or less, Weighted average rate		4.91%	5.25%
Due after one year through two years, Weighted average rate		4.35%	4.53%
Due after two years through three years, Weighted average rate		4.21%	4.02%
Due after three years through four years, Weighted average rate		3.54%	4.37%
Due after four years through five years, Weighted average rate		3.97%	3.52%
Due after five years through fifteen years, Weighted average rate		3.42%	3.26%
Thereafter, Weighted average rate		1.74%	1.72%
Total Weighted average rate		4.55%	4.71%
Federal Home Loan Bank Advances Receivable
Federal Home Loan Bank, Advances, Maturity, Rolling Year, Par Value [Abstract]
Advances accrued interest receivable		$ 156,400	$ 115,000
[1]At December 31, 2023, we had certain advances with embedded features that met the requirements to be separated from the host contract and designated those embedded features as stand-alone derivatives.[2]Excludes accrued interest receivable

Advances - Outstanding by Yea_2

Advances - Outstanding by Year of Contractual Maturity or Next Call Date (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Call Date, Rolling Year, Par Value [Abstract]
Overdrawn demand-deposit accounts	$ 5,013	$ 5,909
Due in one year or less	27,073,306	26,546,662
Due after one year through two years	4,617,222	5,272,439
Due after two years through three years	2,789,655	2,989,434
Due after three years through four years	3,296,937	1,711,697
Due after four years through five years	2,356,311	3,887,061
Due after five years through fifteen years	1,804,702	1,601,794
Thereafter	44,152	51,660
Total par value	$ 41,987,298	$ 42,066,656

Advances - Outstanding by Yea_3

Advances - Outstanding by Year of Contractual Maturity or Next Put Date (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Put or Convert Date, Rolling Year, Par Value [Abstract]
Overdrawn demand-deposit accounts	$ 5,013	$ 5,909
Due in one year or less	32,220,332	27,338,812
Due after one year through two years	4,144,986	8,472,939
Due after two years through three years	1,960,065	1,996,364
Due after three years through four years	2,074,861	1,447,317
Due after four years through five years	700,574	1,955,361
Due after five years through fifteen years	837,315	798,294
Thereafter	44,152	51,660
Total par value	$ 41,987,298	$ 42,066,656

Advances - by Current Interest

Advances - by Current Interest Rate Terms (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Federal Home Loan Bank, Advances, Fixed Rate [Abstract]
Fixed-rate	$ 35,332,343	$ 36,330,552
Federal Home Loan Bank, Advances, Floating Rate [Abstract]
Variable-rate	6,654,955	5,736,104
Total par value	$ 41,987,298	$ 42,066,656

Advances - Narratives (Details)

Advances - Narratives (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
Federal Home Loan Bank, Advances [Line Items]
Allowance for credit lossed on advances	$ 2,200	$ 2,000
Federal Home Loan Bank Advances Receivable
Federal Home Loan Bank, Advances [Line Items]
Nonaccrual status on advances	0	0
Impaired advances	0	0
Modifications	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]
Interest rates of advances outstanding	0%	0%
Maximum [Member]
Federal Home Loan Bank, Advances [Line Items]
Interest rates of advances outstanding	6.23%	6.23%

Mortgage Loans Held for Portf_3

Mortgage Loans Held for Portfolio (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: Allowance for credit losses		$ (2,200)	$ (2,000)
Total mortgage loans, net of allowance for credit losses		$ 3,543,560	$ 3,059,331
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		$ 3,503,694	$ 3,023,423
Premiums		44,700	39,990
Discounts		(3,153)	(2,222)
Deferred derivative gains, net		519	140
Total mortgage loans held for portfolio	[1]	3,545,760	3,061,331
Less: Allowance for credit losses		(2,200)	(2,000)
Total mortgage loans, net of allowance for credit losses		3,543,560	3,059,331
Mortgage loans held for portfolio, accrued interest receivable		22,200	17,800
Single Family [Member] | Fixed-rate 15-year single-family mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Par Value		165,130	192,104
Single Family [Member] | Fixed-rate 20- and 30-year single-family mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Par Value		$ 3,338,564	$ 2,831,319
[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	Sep. 30, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Par Value	$ 3,503,694	$ 3,023,423
Government Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Par Value	137,671	146,314
Conventional Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Par Value	$ 3,366,023	$ 2,877,109

Credit Quality Indicator for Co

Credit Quality Indicator for Conventional Mortgage Loans (Details) - Conventional Mortgage Loans [Member] - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Originated more than five years before current fiscal year	[1]	$ 1,346,171	$ 1,189,035
Originated current fiscal year and preceding four fiscal years	[1]	2,059,503	1,723,347
Total mortgage loans held for portfolio	[1]	3,405,674	2,912,382
Past due 30-59 days delinquent [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Originated more than five years before current fiscal year	[1]	12,728	9,392
Originated current fiscal year and preceding four fiscal years	[1]	7,509	5,630
Total mortgage loans held for portfolio	[1]	20,237	15,022
Past due 60-89 days delinquent [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Originated more than five years before current fiscal year	[1]	3,395	3,068
Originated current fiscal year and preceding four fiscal years	[1]	1,769	1,694
Total mortgage loans held for portfolio	[1]	5,164	4,762
Past due 90 days or more delinquent [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Originated more than five years before current fiscal year	[1]	5,179	6,841
Originated current fiscal year and preceding four fiscal years	[1]	1,131	889
Total mortgage loans held for portfolio	[1]	6,310	7,730
Total past due
Financing Receivable, Credit Quality Indicator [Line Items]
Originated more than five years before current fiscal year	[1]	21,302	19,301
Originated current fiscal year and preceding four fiscal years	[1]	10,409	8,213
Total mortgage loans held for portfolio	[1]	31,711	27,514
Total current loans
Financing Receivable, Credit Quality Indicator [Line Items]
Originated more than five years before current fiscal year	[1]	1,324,869	1,169,734
Originated current fiscal year and preceding four fiscal years	[1]	2,049,094	1,715,134
Total mortgage loans held for portfolio	[1]	$ 3,373,963	$ 2,884,868
[1]Amortized cost excludes accrued interest receivable.

Other Delinquency Statistics of

Other Delinquency Statistics of Mortgage Loans (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Mortgage Loans Past Due [Line Items]
In process of foreclosure	[1]	$ 1,941	$ 2,365
Residential Portfolio Segment
Mortgage Loans Past Due [Line Items]
Past due 90 days or more still accruing interest		1,945	1,356
Loans on nonaccrual status	[2]	$ 6,445	$ 7,913
Past due 90 days or more delinquent [Member] | Residential Portfolio Segment
Mortgage Loans Past Due [Line Items]
Serious delinquency rate	[3]	0.23%	0.30%
Recorded Investment in Government Mortgage Loans [Member]
Mortgage Loans Past Due [Line Items]
In process of foreclosure	[1]	$ 925	$ 623
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		1,945	1,356
Loans on nonaccrual status	[2]	$ 0	$ 0
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	[3]	1.39%	0.94%
Recorded Investment in Conventional Mortgage Loans [Member]
Mortgage Loans Past Due [Line Items]
In process of foreclosure	[1]	$ 1,016	$ 1,742
Mortgage loans on non-accrual status with no allowance for credit losses		3,400	4,300
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	[2]	$ 6,445	$ 7,913
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	[3]	0.19%	0.27%
[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 September 30, 2024, and December 31, 2023, $3.4 million and $4.3 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]Loans that are 90 days or more past due or in the process of foreclosure expressed as a percentage of the amortized cost of the total loan portfolio class.

Allowance for Credit Losses on

Allowance for Credit Losses on Conventional Mortgage Loans (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, beginning of period				$ 2,000
Balance, end of period		$ 2,200		2,200
Residential Portfolio Segment
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, beginning of period				2,000
Balance, end of period		2,200		2,200
Conventional Mortgage Loans [Member] | Residential Portfolio Segment
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, beginning of period	[1]	2,200	$ 2,000	2,000	$ 1,900
Net recoveries	[1]	4	8	4	15
(Reduction of) provision for credit losses	[1]	(4)	(8)	196	85
Balance, end of period	[1]	$ 2,200	$ 2,000	$ 2,200	$ 2,000
[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		Sep. 30, 2024	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Allowance for credit losses - mortgage loans held for portfolio		$ 2,200	$ 2,000
Residential Portfolio Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Allowance for credit losses - mortgage loans held for portfolio		2,200	2,000
Government mortgage loans placed on non-accrual status	[1]	6,445	7,913
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	[1]	$ 0	$ 0
[1]As of September 30, 2024, and December 31, 2023, $3.4 million and $4.3 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		Sep. 30, 2024	Dec. 31, 2023
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		$ 53,239,709	$ 53,098,475
Derivative Assets, before netting and collateral adjustments		88,044	77,637
Derivative Liabilities, before netting and collateral adjustments		(687,458)	(1,010,116)
Derivative Asset, netting adjustments and cash collateral including related accrued interest	[1],[2]	267,379	305,436
Derivative Liability, netting adjustments and cash collateral including related accrued interest	[1],[2]	680,614	1,007,099
Derivative assets		355,423	383,073
Derivative liabilities		(6,844)	(3,017)
Cash collateral and related accrued interest posted		952,400	1,300,000
Cash collateral and related accrued interest received		4,400	3,800
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		51,528,956	52,978,480
Derivative Assets, before netting and collateral adjustments		87,936	77,347
Derivative Liabilities, before netting and collateral adjustments		(687,067)	(1,009,387)
Designated as Hedging Instrument [Member] | Interest-rate swaps [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		50,587,956	51,587,480
Derivative Assets, before netting and collateral adjustments		86,842	77,093
Derivative Liabilities, before netting and collateral adjustments		(685,517)	(1,009,217)
Designated as Hedging Instrument [Member] | Forward-start interest-rate swaps [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		941,000	1,391,000
Derivative Assets, before netting and collateral adjustments		1,094	254
Derivative Liabilities, before netting and collateral adjustments		(1,550)	(170)
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		1,710,753	119,995
Derivative Assets, before netting and collateral adjustments		108	290
Derivative Liabilities, before netting and collateral adjustments		(391)	(729)
Not Designated as Hedging Instrument [Member] | Interest-rate swaps [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		1,641,043	90,000
Derivative Assets, before netting and collateral adjustments		0	0
Derivative Liabilities, before netting and collateral adjustments		(236)	(729)
Mortgage Receivable [Member] | Mortgage-delivery commitments [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, before netting and collateral adjustments		108	290
Derivative Liabilities, before netting and collateral adjustments		(155)
Derivative assets		108	290
Derivative liabilities		(155)
Mortgage Receivable [Member] | Not Designated as Hedging Instrument [Member] | Mortgage-delivery commitments [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	[3]	69,710	29,995
Derivative Assets, before netting and collateral adjustments	[3]	108	290
Derivative Liabilities, before netting and collateral adjustments	[3]	$ (155)	$ 0
[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.

Derivatives and Hedging Activ_4

Derivatives and Hedging Activities Derivatives in Statement of Income and Impact on Interest Income/Expense (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Derivative Instruments, Gain (Loss) [Line Items]
Interest income on advances		$ 535,200	$ 486,508	$ 1,615,872	$ 1,587,597
Interest income on available-for-sale securities		234,545	214,392	707,504	590,767
Interest expense on consolidated obligations bonds		(567,157)	(477,389)	(1,609,188)	(1,349,479)
Advances [Member] | Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net changes in fair value before price alignment interest		(3,306)	(64)	(938)	270
Advances [Member] | Interest Rate Contract [Member] | Interest Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives		(212,219)	32,714	(104,427)	52,677
Hedged items		208,913	(32,778)	103,489	(52,407)
Price alignment interest	[1]	(2,204)	(2,771)	(4,075)	(6,354)
Net interest settlements on derivatives	[2],[3]	56,387	53,399	172,692	125,370
Net gains (losses) on qualifying fair-value hedging relationships		50,877	50,564	167,679	119,286
Amortization/accretion of discontinued hedging relationships		(166)	(366)	(813)	(1,349)
Net gains (losses) on derivatives and hedging activities recorded in net interest income		50,711	50,198	166,866	117,937
Available-for-sale securities | Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net changes in fair value before price alignment interest		(5,331)	(299)	(2,319)	(3,179)
Available-for-sale securities | Interest Rate Contract [Member] | Interest Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives		(381,278)	144,001	(280,496)	120,049
Hedged items		375,947	(144,300)	278,177	(123,228)
Price alignment interest	[1]	(10,679)	(15,008)	(40,184)	(35,365)
Net interest settlements on derivatives	[2],[3]	122,394	125,784	371,440	337,838
Net gains (losses) on qualifying fair-value hedging relationships		106,384	110,477	328,937	299,294
Amortization/accretion of discontinued hedging relationships		0	0	0	0
Net gains (losses) on derivatives and hedging activities recorded in net interest income		106,384	110,477	328,937	299,294
COs - bonds [Member] | Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net changes in fair value before price alignment interest		54	1,152	(653)	962
COs - bonds [Member] | Interest Rate Contract [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives		358,310	(2,046)	396,862	79,608
Hedged items		(358,256)	3,198	(397,515)	(78,646)
Price alignment interest	[1]	416	332	1,302	872
Net interest settlements on derivatives	[2],[3]	(151,214)	(170,493)	(470,450)	(468,235)
Net gains (losses) on qualifying fair-value hedging relationships		(150,744)	(169,009)	(469,801)	(466,401)
Amortization/accretion of discontinued hedging relationships		(847)	(1,463)	(3,550)	(621)
Net gains (losses) on derivatives and hedging activities recorded in net interest income		$ (151,591)	$ (170,472)	$ (473,351)	$ (467,022)
[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	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Interest Expense [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gains (losses) reclassified from accumulated other comprehensive loss into interest expense	$ 1,314	$ (1,130)	$ (39)	$ (3,374)
Other Comprehensive Income (Loss) [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
(Losses) gains recognized in other comprehensive income	$ (18,767)	$ 22,950	$ 3,592	$ 25,497

Derivatives and Hedging Activ_6

Derivatives and Hedging Activities Cumulative Basis Adjustments for Fair Value Hedges (Details) $ in Thousands	Sep. 30, 2024 USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged Liability, Statement of Financial Position [Extensible Enumeration]	Bonds
Amortized Cost of Hedged Asset/(Liability)	$ 23,599,942	[1]
Basis Adjustments for Active Hedging Relationships Included in Amortized Cost	(496,541)
Basis Adjustments for Discontinued Hedging Relationships Included in Amortized Cost	35,153
Cumulative Amount of Fair Value Hedging Basis Adjustments	(461,388)
Advances
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amortized Cost of Hedged Asset/(Liability)	14,612,292	[1]
Basis Adjustments for Active Hedging Relationships Included in Amortized Cost	51,014
Basis Adjustments for Discontinued Hedging Relationships Included in Amortized Cost	5,050
Cumulative Amount of Fair Value Hedging Basis Adjustments	$ 56,064
Hedged Asset, Statement of Financial Position [Extensible Enumeration]	Advances
Available-for-sale securities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amortized Cost of Hedged Asset/(Liability)	$ 11,184,356	[1]
Basis Adjustments for Active Hedging Relationships Included in Amortized Cost	608,767
Basis Adjustments for Discontinued Hedging Relationships Included in Amortized Cost	0
Cumulative Amount of Fair Value Hedging Basis Adjustments	$ 608,767
Hedged Asset, Statement of Financial Position [Extensible Enumeration]	Available-for-sale securities Fair Value
[1]Includes only the amortized cost of hedged items in fair-value hedging relationships.

Impact of Variation Margin for

Impact of Variation Margin for Cleared Derivatives on the Statement of Cash Flow (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Derivative [Line Items]
Financing activity - net receipts on derivatives with financing element	$ 2,389	$ (36,070)
Cleared derivatives [Member]
Derivative [Line Items]
Operating activity - net change in derivatives and hedging activities	(310,209)	400,260
Financing activity - net receipts on derivatives with financing element	1,619	50,123
Total variation margin (paid) received on cleared derivatives	$ (308,590)	$ 450,383

Derivatives and Hedging Activ_7

Derivatives and Hedging Activities Fair Value of Derivative Instruments With or Without Legal Rights of Offset (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Offsetting Assets [Line Items]
Derivative Assets, Netting Adjustments and Cash Collateral	[1],[2]	$ 267,379	$ 305,436
Derivative liability, Netting Adjustments and Cash Collateral	[1],[2]	680,614	1,007,099
Derivative Assets, before netting and collateral adjustments		88,044	77,637
Derivative Liabilities, before netting and collateral adjustments		(687,458)	(1,010,116)
Derivative assets		355,423	383,073
Derivative liabilities		(6,844)	(3,017)
Uncleared derivatives [Member] | Interest-rate swaps [Member]
Offsetting Assets [Line Items]
Derivative Asset, total gross recognized amount		50,281	72,517
Derivative Liability, total gross recognized amount		(677,371)	(997,974)
Derivative Assets, Netting Adjustments and Cash Collateral		(42,958)	(69,838)
Derivative liability, Netting Adjustments and Cash Collateral		670,682	994,957
Derivative assets		7,323	2,679
Derivative liabilities		(6,689)	(3,017)
Cleared derivatives [Member] | Interest-rate swaps [Member]
Offsetting Assets [Line Items]
Derivative Asset, total gross recognized amount		37,655	4,830
Derivative Liability, total gross recognized amount		(9,931)	(12,142)
Derivative Assets, Netting Adjustments and Cash Collateral		310,337	375,274
Derivative liability, Netting Adjustments and Cash Collateral		9,931	12,142
Derivative assets		347,992	380,104
Derivative liabilities		0	0
Mortgage Receivable [Member] | Mortgage-delivery commitments [Member]
Offsetting Assets [Line Items]
Derivative Assets, before netting and collateral adjustments		108	290
Derivative Liabilities, before netting and collateral adjustments		(155)
Derivative assets		108	$ 290
Derivative liabilities		$ (155)
[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.

Derivatives and Hedging Activ_8

Derivatives and Hedging Activities Narratives (Details) - USD ($)		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023
Derivative [Line Items]
Reclassifications from accumulated other comprehensive loss into earnings as a result of the discontinuance of cash-flow hedges		$ 0	$ 0
Maximum length of time which we are hedging our exposure to the variability in future cash flows for forecasted transactions		7 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		$ 8,500,000
Aggregate fair value of all uncleared derivatives in a net-liability position (before cash collateral and related accrued interest)		631,200,000
Post-haircut value of collateral already posted		632,100,000
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]	$ 69,734,000
[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	Sep. 30, 2024	Dec. 31, 2023
Deposits [Abstract]
Interest-bearing deposits demand and overnight	$ 728,197	$ 896,005
Non-interest bearing deposits other	37,634	26,874
Total deposits	765,831	922,879
Federally Insured Liability Deposits	$ 0	$ 0

CO Bonds Outstanding by Contrac

CO Bonds Outstanding by Contractual Maturity (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Schedule of Short-term and Long-term Debt [Line Items]
Due in one year or less, weighted average rate	[1]	4.31%	4.27%
Due after one year through two years, weighted average rate	[1]	2.36%	2.86%
Due after two years through three years, weighted average rate	[1]	2.92%	1.76%
Due after three years through four years, weighted average rate	[1]	3.22%	2.94%
Due after four years through five years, weighted average rate	[1]	3.87%	2.94%
Thereafter, weighted average rate	[1]	3.38%	2.95%
Total par value		$ 52,787,840	$ 41,092,875
Hedging adjustments		(461,388)	(862,100)
Total		52,338,590	40,248,743
COs - bonds [Member]
Schedule of Short-term and Long-term Debt [Line Items]
Due in one year or less		32,036,475	17,841,615
Due after one year through two years		8,169,250	7,476,350
Due after two years through three years		4,123,300	7,014,955
Due after three years through four years		3,326,480	2,854,250
Due after four years through five years		1,884,515	2,712,400
Thereafter		3,247,820	3,193,305
Total par value		$ 52,787,840	$ 41,092,875
Total par value, weighted average rate	[1]	3.76%	3.30%
Premiums		$ 25,831	$ 32,419
Discounts		$ (13,693)	$ (14,451)
[1] The CO bonds' weighted-average rate excludes concession fees.

CO Bonds Outstanding by Early R

CO Bonds Outstanding by Early Redemption Feature (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Total par value	$ 52,787,840	$ 41,092,875
Noncallable and nonputable
Debt Instrument [Line Items]
Total par value	33,537,640	18,882,235
Callable
Debt Instrument [Line Items]
Total par value	$ 19,250,200	$ 22,210,640

CO Bonds Outstanding by Contr_2

CO Bonds Outstanding by Contractual Maturity or Next Call Date (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Total par value	$ 52,787,840	$ 41,092,875
Earlier Of Contractual Maturity Or Next Call Date [Member]
Debt Instrument [Line Items]
Due in one year or less	43,735,675	30,900,615
Due after one year through two years	3,789,250	4,203,850
Due after two years through three years	1,441,100	2,487,955
Due after three years through four years	1,606,480	852,750
Due after four years through five years	789,515	1,171,400
Thereafter	1,425,820	1,476,305
Total par value	$ 52,787,840	$ 41,092,875

CO Bonds by Interest Rate-Payme

CO Bonds by Interest Rate-Payment Type (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Total par value		$ 52,787,840	$ 41,092,875
Fixed-rate [Member]
Debt Instrument [Line Items]
Total par value		31,437,840	32,454,235
Step-up [Member]
Debt Instrument [Line Items]
Total par value	[1]	5,097,000	5,626,140
Simple variable-rate [Member]
Debt Instrument [Line Items]
Total par value		$ 16,253,000	$ 3,012,500
[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		Sep. 30, 2024	Dec. 31, 2023
Debt Disclosure [Abstract]
Federal Home Loan Bank, Consolidated Obligations, Discount Notes		$ 14,941,067	$ 22,000,546
Par value		$ 15,030,861	$ 22,150,970
Weighted Average Rate	[1]	5.11%	5.31%
[1] CO discount notes' weighted-average rate represents a yield to maturity excluding concession fees.

Affordable Housing Program Narr

Affordable Housing Program Narratives (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Affordable Housing Program [Roll Forward]
Balance at beginning of year			$ 87,164	$ 76,622	$ 76,622
AHP expense for the period	$ 6,720	$ 7,798	23,193	22,915	28,648
AHP voluntary contribution	507	$ 0	1,852	2,000	2,000
AHP direct grant disbursements			(14,132)	$ (13,442)	(16,144)
AHP subsidy for AHP advance disbursements			(998)		(3,965)
Return of previously disbursed grants and subsidies			302		3
Balance at end of period	$ 97,381		$ 97,381		$ 87,164

Regulatory Capital Requirements

Regulatory Capital Requirements (Details) $ in Thousands	Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
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
Risk-based capital, Required	$ 589,241	$ 628,052
Regulatory capital, Required	2,895,874	2,685,691
Leverage capital, Required	3,619,842	3,357,114
Risk-based capital, Actual	4,040,103	3,839,236
Regulatory capital, Actual	$ 4,040,103	$ 3,839,236
Capital-to-asset ratio, Actual	5.60%	5.70%
Leverage capital, Actual	$ 6,060,155	$ 5,758,854
Leverage capital-to-assets ratio, Actual	8.40%	8.60%

Mandatorily Redeemable Capital

Mandatorily Redeemable Capital Stock by Expiry of Redemption Notice Period (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Banking Regulation, Total Capital [Abstract]
Past redemption date	[1]	$ 2,669	$ 2,778
Due in one year or less		435	0
Due after one year through two years		689	435
Due after two years through three years		960	689
Due after three years through four years		333	960
Due after four years through five years		0	1,221
Total		$ 5,086	$ 6,083
[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 ($) $ / shares in Units, $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Contribution requirement - restricted retained earnings	$ 643,600
Restricted retained earnings	$ 492,833	$ 451,154
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
Maximum [Member]
Class B Stock Purchase Requirement Amount	$ 5,000

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Accumulated Other Comprehensive Income (Loss) Before Tax1 [Roll Forward]
Beginning of period		$ 3,681,966	$ 3,469,852	$ 3,538,614	$ 3,415,321
Total other comprehensive income (loss)		40,848	(34,780)	66,880	(20,040)
Period end		3,807,358	3,459,789	3,807,358	3,459,789
Net Unrealized Gain (Loss) Relating to Hedging Activities [Member]
Accumulated Other Comprehensive Income (Loss) Before Tax1 [Roll Forward]
Beginning of period		69,676	47,273	45,964	42,482
Net unrealized gains (losses)		(18,767)	22,950	3,592	25,497
Net actuarial loss		0	0	0	0
Amortization - hedging activities	[1]	(1,314)	1,130	39	3,374
Total other comprehensive income (loss)		(20,081)	24,080	3,631	28,871
Period end		49,595	71,353	49,595	71,353
Pension and Postretirement Benefits [Member]
Accumulated Other Comprehensive Income (Loss) Before Tax1 [Roll Forward]
Beginning of period		598	1,119	749	1,374
Net unrealized gains (losses)		0	0	0	0
Net actuarial loss		(76)	(122)	(227)	(377)
Amortization - hedging activities	[1]	0	0	0	0
Total other comprehensive income (loss)		(76)	(122)	(227)	(377)
Period end		522	997	522	997
Total Accumulated Other Comprehensive Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) Before Tax1 [Roll Forward]
Beginning of period		(268,507)	(291,685)	(294,539)	(306,425)
Net unrealized gains (losses)		42,238	(35,788)	67,068	(23,037)
Net actuarial loss		(76)	(122)	(227)	(377)
Amortization - hedging activities	[1]	(1,314)	1,130	39	3,374
Total other comprehensive income (loss)		40,848	(34,780)	66,880	(20,040)
Period end		(227,659)	(326,465)	(227,659)	(326,465)
Available-for-sale securities | Net Unrealized Gain (Loss) on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) Before Tax1 [Roll Forward]
Beginning of period		(338,781)	(340,077)	(341,252)	(350,281)
Net unrealized gains (losses)		61,005	(58,738)	63,476	(48,534)
Net actuarial loss		0	0	0	0
Amortization - hedging activities	[1]	0	0	0	0
Total other comprehensive income (loss)		61,005	(58,738)	63,476	(48,534)
Period end		$ (277,776)	$ (398,815)	$ (277,776)	$ (398,815)
[1]Recorded in CO bond interest expense.

Fair Values Carrying Value and

Fair Values Carrying Value and Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks		$ 50,242	$ 53,412
Available-for-sale securities Fair Value		16,925,261	15,343,745
Held-to-Maturity Securities Carrying Value	[1]	66,439	78,905
Held-to-maturity fair value		66,475	78,478
Accrued interest receivable		223,195	185,709
Derivative assets		355,423	383,073
Derivative Assets, Netting Adjustments and Cash Collateral	[2],[3]	267,379	305,436
Mandatorily redeemable capital stock		(5,086)	(6,083)
Accrued interest payable		(361,110)	(269,517)
Derivative liabilities		(6,844)	(3,017)
Derivative liability, Netting Adjustments and Cash Collateral	[2],[3]	680,614	1,007,099
Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks		50,242	53,412
Interest-bearing deposits		1,809,628	1,643,587
Securities purchased under agreements to resell		0	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]	16,489	13,724
Deposits		0	0
Mandatorily redeemable capital stock		(5,086)	(6,083)
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		2,750,001	1,599,996
Federal funds sold		4,584,997	2,499,995
Trading securities	[4]	1,496	1,395
Available-for-sale securities Fair Value	[4]	16,903,870	15,321,940
Held-to-maturity fair value		66,475	78,478
Advances		41,988,285	41,834,762
Mortgage loans, net		3,341,656	2,781,976
Accrued interest receivable		223,195	185,709
Derivative assets	[4]	88,044	77,637
Other assets	[4]	16,385	14,645
Deposits		(765,807)	(922,830)
Mandatorily redeemable capital stock		0	0
Accrued interest payable		(361,110)	(269,517)
Derivative liabilities	[4]	(687,458)	(1,010,116)
Level 2 [Member] | Commitments to make additional advances [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other		(267)	(2,101)
Level 2 [Member] | Standby Letters of Credit [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other		(1,526)	(1,340)
Level 2 [Member] | COs - Discount notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
CO Discount notes		(14,946,443)	(21,998,576)
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	0
Federal funds sold		0	0
Trading securities	[4]	0	0
Available-for-sale securities Fair Value	[4]	21,391	21,805
Held-to-maturity fair value		0	0
Advances		0	0
Mortgage loans, net		12,429	14,024
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		50,242	53,412
Interest-bearing deposits		1,809,628	1,643,587
Securities purchased under agreements to resell		2,750,000	1,600,000
Federal funds sold		4,585,000	2,500,000
Trading securities	[4]	1,496	1,395
Available-for-sale securities Fair Value	[4]	16,925,261	15,343,745
Held-to-Maturity Securities Carrying Value		66,439	78,905
Advances		42,006,806	41,958,583
Mortgage loans, net		3,543,560	3,059,331
Accrued interest receivable		223,195	185,709
Derivative assets	[4]	355,423	383,073
Other assets	[4]	32,874	28,369
Deposits		(765,831)	(922,879)
Mandatorily redeemable capital stock		(5,086)	(6,083)
Accrued interest payable		(361,110)	(269,517)
Derivative liabilities	[4]	(6,844)	(3,017)
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		(1,526)	(1,340)
Carrying Value [Member] | COs - Discount notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
CO Discount notes		(14,941,067)	(22,000,546)
Total Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks		50,242	53,412
Interest-bearing deposits		1,809,628	1,643,587
Securities purchased under agreements to resell		2,750,001	1,599,996
Federal funds sold		4,584,997	2,499,995
Trading securities	[4]	1,496	1,395
Available-for-sale securities Fair Value	[4]	16,925,261	15,343,745
Held-to-maturity fair value		66,475	78,478
Advances		41,988,285	41,834,762
Mortgage loans, net		3,354,085	2,796,000
Accrued interest receivable		223,195	185,709
Derivative assets	[4]	355,423	383,073
Other assets	[4]	32,874	28,369
Deposits		(765,807)	(922,830)
Mandatorily redeemable capital stock		(5,086)	(6,083)
Accrued interest payable		(361,110)	(269,517)
Derivative liabilities	[4]	(6,844)	(3,017)
Total Fair Value [Member] | Commitments to make additional advances [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other		(267)	(2,101)
Total Fair Value [Member] | Standby Letters of Credit [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other		(1,526)	(1,340)
Total Fair Value [Member] | COs - Discount notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
CO Discount notes		(14,946,443)	(21,998,576)
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		(52,205,575)	(39,887,287)
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		(52,338,590)	(40,248,743)
COs - bonds [Member] | Total Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
CO Bonds		$ (52,205,575)	$ (39,887,287)
[1]Fair values of held-to-maturity securities were $66,475 and $78,478 at September 30, 2024, and December 31, 2023 , respectively. 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. 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		Sep. 30, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		$ 16,925,261	$ 15,343,745
Derivative assets		355,423	383,073
Derivative Assets, Netting Adjustments and Cash Collateral	[1],[2]	267,379	305,436
Derivative liabilities		(6,844)	(3,017)
Derivative liability, Netting Adjustments and Cash Collateral	[1],[2]	680,614	1,007,099
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]	16,489	13,724
Derivative liabilities	[3]	0	0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	[3]	1,496	1,395
Available-for-sale securities Fair Value	[3]	16,903,870	15,321,940
Derivative assets	[3]	88,044	77,637
Other assets	[3]	16,385	14,645
Derivative liabilities	[3]	(687,458)	(1,010,116)
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]	21,391	21,805
Derivative assets	[3]	0	0
Other assets	[3]	0	0
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]	267,379	305,436
Derivative liability, Netting Adjustments and Cash Collateral	[4]	680,614	1,007,099
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]	267,379	305,436
Derivative liability, Netting Adjustments and Cash Collateral	[4]	680,614	1,007,099
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
Derivative assets		0	0
Other assets		16,489	13,724
Total assets carried at fair value		16,489	13,724
Total liabilities carried at fair value		0	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]
Available-for-sale securities Fair Value		16,903,870	15,321,940
Derivative assets		88,044	77,637
Other assets		16,385	14,645
Total assets carried at fair value		17,009,795	15,415,617
Total liabilities carried at fair value		(687,458)	(1,010,116)
Recurring [Member] | Level 2 [Member] | Interest-rate swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		87,936	77,347
Derivative liabilities		(687,303)	(1,010,116)
Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		21,391	21,805
Derivative assets		0	0
Other assets		0	0
Total assets carried at fair value		21,391	21,805
Total liabilities carried at fair value		0	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
Estimate of Fair Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	[3]	1,496	1,395
Available-for-sale securities Fair Value	[3]	16,925,261	15,343,745
Derivative assets	[3]	355,423	383,073
Other assets	[3]	32,874	28,369
Derivative liabilities	[3]	(6,844)	(3,017)
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		16,925,261	15,343,745
Derivative assets		355,423	383,073
Other assets		32,874	28,369
Total assets carried at fair value		17,315,054	15,756,582
Total liabilities carried at fair value		(6,844)	(3,017)
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		355,315	382,783
Derivative liabilities		(6,689)	(3,017)
Corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		1,496	1,395
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		1,496	1,395
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		1,496	1,395
US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		5,844,132	5,664,452
US Treasury 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
US Treasury 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		5,844,132	5,664,452
US Treasury 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		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]
Available-for-sale securities Fair Value		5,844,132	5,664,452
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		206,443	14,433
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		206,443	14,433
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		206,443	14,433
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		471,494	477,676
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		471,494	477,676
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		471,494	477,676
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		108	290
Derivative liabilities		(155)
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		108	290
Derivative liabilities		(155)
HFA securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		21,391	21,805
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		21,391	21,805
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		21,391	21,805
Supranational institutions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		343,666	346,375
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		343,666	346,375
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		343,666	346,375
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		237,634	235,191
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		237,634	235,191
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		237,634	235,191
GSE [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities Fair Value		100,216	99,421
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		100,216	99,421
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		100,216	99,421
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		2,084,454	904,456
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		2,084,454	904,456
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		2,084,454	904,456
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		7,615,831	7,579,936
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		7,615,831	7,579,936
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		$ 7,615,831	$ 7,579,936
[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. Carried at fair value and measured on a recurring basis.

Estimated Fair Value Level 3 Re

Estimated Fair Value Level 3 Reconciliation - Roll Forward (Details) - HFA securities [Member] - Level 3 [Member] - Recurring [Member] - Available-for-sale securities - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 21,174	$ 32,391	$ 21,805	$ 32,774
Net unrealized gains	217	298	556	825
Settlements	0	0	(970)	(910)
Balance at end of period	21,391	32,689	21,391	32,689
Total amount of unrealized gains for the period included in other comprehensive income relating to securities held at period end	$ 217	$ 298	$ 556	$ 825

Off-Balance Sheet Commitments (

Off-Balance Sheet Commitments (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2024	Dec. 31, 2023
Loss Contingencies [Line Items]
Value of the guarantees related to standby letters of credit		$ 73,574	$ 65,711
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	1,100,000,000
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]	$ 8,460,340	8,217,388
Off-balance-sheet Commitments Expiring After One Year	[1],[2]	314,262	207,677
Total Off-balance Sheet Commitments	[1],[2]	8,774,602	8,425,065
Value of the guarantees related to standby letters of credit		1,500	1,300
Commitments of unused lines of credit - advances [Member]
Loss Contingencies [Line Items]
Off-balance-sheet Commitments Expiring Within One Year	[2],[3]	1,102,651	1,113,354
Off-balance-sheet Commitments Expiring After One Year	[2],[3]	0	0
Total Off-balance Sheet Commitments	[2],[3]	$ 1,102,651	1,113,354
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]	$ 21,350	13,170
Off-balance-sheet Commitments Expiring After One Year	[2]	12,263	20,463
Total Off-balance Sheet Commitments	[2]	33,613	33,633
Unsettled CO bonds, at par [Member]
Loss Contingencies [Line Items]
Off-balance-sheet Commitments Expiring Within One Year		98,000	131,500
Off-balance-sheet Commitments Expiring After One Year		0	0
Total Off-balance Sheet Commitments		98,000	131,500
Unsettled CO discount notes, at par [Member]
Loss Contingencies [Line Items]
Off-balance-sheet Commitments Expiring Within One Year	[2]	0	61,008
Off-balance-sheet Commitments Expiring After One Year	[2]	0	0
Total Off-balance Sheet Commitments	[2]	0	61,008
Standby Letters of Credit Issuance Commitments [Member]
Loss Contingencies [Line Items]
Off-balance-sheet Commitments Expiring Within One Year		47,900	16,000
Off-balance-sheet Commitments Expiring After One Year			13,100
Mortgage Receivable [Member] | Commitments to invest in mortgage loans [Member]
Loss Contingencies [Line Items]
Off-balance-sheet Commitments Expiring Within One Year	[2]	69,710	29,995
Off-balance-sheet Commitments Expiring After One Year	[2]	0	0
Total Off-balance Sheet Commitments	[2]	$ 69,710	$ 29,995
[1]The amount of standby letters of credit outstanding excludes commitments to issue standby letters of credit. At September 30, 2024, and December 31, 2023, commitments to issue standby letters of credit that expire within one year totaled $47.9 million and $16.0 million, respectively, and at December 31, 2023, commitments to issue standby letters of credit that expire after one year totaled $13.1 million.[2]We have determined that it is unnecessary to record any liability for credit losses on these agreements based on our credit extension and collateral policies.[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	Sep. 30, 2024	Dec. 31, 2023
Transactions with Shareholders [Line Items]
Capital Stock Outstanding	$ 2,161,471	$ 2,042,453
Par Value of Advances	41,987,298	42,066,656
Total Accrued Interest Receivable	223,195	185,709
State Street Bank And Trust Company
Transactions with Shareholders [Line Items]
Capital Stock Outstanding	$ 335,000
Percent of Total Capital Stock	15.50%
Par Value of Advances	$ 6,000,000
Percentage of Total Par Value of Advances	14.30%
Total Accrued Interest Receivable	$ 39,102
Percent of Total Accrued Interest Receivable on Advances	25%
Directors' Financial Institutions [Member]
Transactions with Shareholders [Line Items]
Capital Stock Outstanding	$ 49,352	$ 201,250
Percent of Total Capital Stock	2.30%	9.80%
Par Value of Advances	$ 677,825	$ 4,485,824
Percentage of Total Par Value of Advances	1.60%	10.70%
Total Accrued Interest Receivable	$ 869	$ 5,953
Percent of Total Accrued Interest Receivable on Advances	0.60%	5.20%
Minimum [Member]
Transactions with Shareholders [Line Items]
Definition of shareholder concentration, minimum percent	10%

Subsequent Events (Details)

Subsequent Events (Details) - Common Class B [Member] - Subsequent Event [Member] - USD ($) $ in Millions	Nov. 04, 2024	Oct. 25, 2024
Subsequent Event [Line Items]
Annualized rate of cash dividend		8.36%
Dividend, including dividends on mandatorily redeemable capital stock	$ 43