Federal Home Loan Bank of Pittsburgh 10-Q 5 Nov 24 2024 Q2 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2024	Oct. 31, 2024
Document 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	000-51395
Entity Registrant Name	FEDERAL HOME LOAN BANK OF PITTSBURGH
Entity Tax Identification Number	25-6001324
Entity Address, Address Line One	301 Grant Street, Suite 2000
Entity Address, City or Town	Pittsburgh,
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	15219
City Area Code	412
Local Phone Number	288-3400
Entity Central Index Key	0001330399
Current Fiscal Year End Date	--12-31
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Current Reporting Status	Yes
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		38,518,013
Entity Home Country ISO Code	X1

Statements of Income

Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Interest income:
Advances	$ 1,058,730	$ 1,071,029	$ 3,147,401	$ 3,120,857
Interest-bearing deposits	51,864	54,845	154,576	150,582
Securities purchased under agreements to resell	112,166	89,233	307,693	217,988
Federal funds sold	44,607	44,629	125,662	148,900
Trading securities	1,543	1,845	4,864	5,533
Available-for-sale (AFS) securities	262,123	190,518	735,937	516,045
Held-to-maturity (HTM) securities	12,920	10,744	40,633	26,878
Mortgage loans held for portfolio	42,555	37,516	124,967	108,824
Total interest income	1,586,508	1,500,359	4,641,733	4,295,607
Interest expense:
Consolidated obligations - discount notes	143,277	220,233	466,347	943,590
Consolidated obligations - bonds	1,238,603	1,079,869	3,558,550	2,778,910
Deposits	8,721	10,344	26,901	24,533
Mandatorily redeemable capital stock and other borrowings	621	601	1,841	1,831
Interest Expense, Operating	1,391,222	1,311,047	4,053,639	3,748,864
Net interest income	195,286	189,312	588,094	546,743
Provision (reversal) for credit losses	(847)	1,863	1,135	4,080
Net interest income after provision for credit losses	196,133	187,449	586,959	542,663
Other noninterest income (loss):
Net gains (losses) on investment securities (Note 2)	4,303	(2,437)	3,279	(1,077)
Net gains (losses) on derivatives (Note 5)	(17,965)	7,270	(10,618)	21,216
Standby letters of credit fees	8,823	8,133	25,750	22,173
Other, net	1,174	1,063	3,357	2,507
Total noninterest income (loss)	(3,665)	14,029	21,768	44,819
Other Expense
Compensation and benefits	16,875	14,828	47,934	43,723
Other operating	11,918	9,890	35,458	28,522
Finance Agency	2,055	1,652	6,168	4,960
Office of Finance	1,822	1,570	5,202	4,379
Total other expense	43,032	27,940	122,259	81,584
Income before assessments	149,436	173,538	486,468	505,898
Affordable Housing Program (AHP) assessment	15,006	17,414	48,831	50,764
Net income	134,430	156,124	437,637	455,134
Voluntary Contribution Expense	$ 10,362	$ 0	$ 27,497	$ 0

Statements of Comprehensive Inc

Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Net income	$ 134,430	$ 156,124	$ 437,637	$ 455,134
Other comprehensive income (loss):
Net unrealized gains (losses) on AFS securities	30,517	(65,343)	69,307	(48,659)
Total other comprehensive income (loss)	30,547	(65,351)	67,444	(49,173)
Total comprehensive income (loss)	164,977	90,773	505,081	405,961
Pension and Post Retirement Plans
Other comprehensive income (loss):
Pension and post-retirement benefits	30	(8)	(1,863)	(25)
Net Unrealized Gains(Losses)
Other comprehensive income (loss):
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	$ 0	$ 0	$ 0	$ (489)

Statements of Condition

Statements of Condition - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
ASSETS
Cash and due from banks		$ 17,391	$ 11,509
Interest-bearing deposits (Note 2)		3,115,630	3,110,803
Securities Purchased under Agreements to Resell ( Note 2)		4,780,000	5,980,000
Federal Funds Sold ( Note 2)		3,542,000	2,533,000
Investment securities: (Note 2)
Trading securities		156,729	217,722
AFS securities, net; amortized cost of $17,921,485 and $14,907,783		17,904,881	14,822,933
HTM securities; fair value of $1,333,194 and $1,272,746	[1]	1,384,587	1,339,759
Total investment securities		19,446,197	16,380,414
Advances (Note 3)		79,265,375	78,431,508
Mortgage loans held for portfolio, net (Note 4)		4,746,742	4,697,752
Accrued interest receivable		538,812	517,361
Derivative assets (Note 5)		409,878	408,507
Other assets		102,342	76,791
Total assets		115,964,367	112,147,645
Liabilities
Deposits		704,863	636,726
Consolidated obligations: (Note 6)
Discount notes		9,776,014	13,683,580
Bonds		98,528,817	90,801,032
Total consolidated obligations		108,304,831	104,484,612
Mandatorily redeemable capital stock (Note 7)		27,554	27,874
Accrued interest payable		625,184	753,663
AHP payable		146,481	116,338
Derivative liabilities (Note 5)		12,087	7,334
Other liabilities		181,868	441,360
Total liabilities		110,002,868	106,467,907
Commitments and contingencies (Note 10)
Capital (Note 7)
Capital stock - Class B putable ($100 par value) issued and outstanding shares 39,324 and 39,205, respectively		3,932,380	3,920,530
Retained earnings:
Unrestricted		1,331,263	1,216,323
Restricted		702,900	615,373
Total retained earnings		2,034,163	1,831,696
Accumulated Other Comprehensive Income (Loss) (AOCI)		(5,044)	(72,488)
Total capital		5,961,499	5,679,738
Total liabilities and capital		$ 115,964,367	$ 112,147,645
[1] Includes adjustments made to the cost basis of an investment for accretion and amortization and excludes accrued interest receivable

Statement of Condition (Parenth

Statement of Condition (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
ASSETS
HTM securities - fair value	$ 1,333,194	$ 1,272,746
AFS Securities - Amortized Cost	$ 17,921,485	$ 14,907,783	[1]
Stockholders' Equity Attributable to Parent [Abstract]
Capital Stock, Par value Per Share	$ 100	$ 100
Capital Stock, Shares, Issued and Outstanding	39,324,000	39,205,000
[1] Includes adjustments made to the cost basis of an investment for accretion, amortization and/or fair value hedge accounting adjustments, and excludes accrued interest receivable

Statements of Cash Flows

Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
OPERATING ACTIVITIES
Net income	$ 437,637	$ 455,134
Adjustments to reconcile net income to net cash provided by(used in) operating activities:
Depreciation and amortization	(54,511)	(68,142)
Net change in derivative and hedging activities	(188,668)	(7,117)
Net realized (gains) loss from sales of AFS securities	0	(489)
Net change in fair value adjustments on trading securities	(3,279)	1,566
Other adjustments	3,085	5,355
Net change in:
Accrued interest receivable	(21,101)	(189,341)
Other assets	(13,414)	(600)
Accrued interest payable	(128,465)	520,396
Other liabilities	74,328	34,701
Net cash provided by (used in) operating activities	105,612	751,463
Net change in:
Interest-bearing deposits (including $469 and $(365) (to) from other FHLBanks)	186,929	(490,832)
Federal funds sold	1,200,000	(180,000)
Federal funds sold	(1,009,000)	(486,000)
Proceeds	64,350	0
AFS securities:
Proceeds (includes $0, and $798,200 from sales)	1,103,029	2,591,823
Purchases	(4,225,845)	(3,996,519)
HTM securities:
Proceeds	150,760	106,740
Purchases	(197,236)	(398,645)
Advances:
Repaid	359,743,408	556,170,718
Originated	(360,393,132)	(563,639,027)
Mortgage loans held for portfolio:
Proceeds	280,524	276,878
Purchases	(337,070)	(356,582)
Other investing activities, net	(15,688)	(1,026)
Net cash provided by (used in) investing activities	(3,448,971)	(10,402,472)
FINANCING ACTIVITIES
Net change in deposits	68,906	325,604
Net proceeds from issuance of consolidated obligations:
Discount notes	375,934,871	473,218,395
Bonds	93,726,145	76,646,396
Payments for maturing and retiring consolidated obligations
Discount notes	(379,809,621)	(494,401,699)
Bonds	(86,347,420)	(46,332,725)
Proceeds from issuance of capital stock	3,179,487	4,314,023
Payments for repurchase/redemption of capital stock	(3,161,817)	(3,888,129)
Payments for repurchase/redemption of mandatorily redeemable capital stock	(6,140)	(13,448)
Cash dividends paid	(235,170)	(210,322)
Net cash provided by (used in) financing activities	3,349,241	9,658,095
Net increase (decrease) in cash and due from banks	5,882	7,086
Cash and due from banks at beginning of the period	11,509	13,242
Cash and due from banks at end of the period	17,391	20,328
Supplemental disclosures:
Interest paid	4,079,283	3,492,487
AHP payments, net	21,575	17,118
Capital stock reclassified to mandatorily redeemable capital stock	$ 5,820	$ 13,681

Statements of Cash Flows (Paren

Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Cash Flows [Abstract]
Interest-bearing deposits (including $469 and $(365) (to) from other FHLBanks)			$ 469	$ (365)
Net Cash Provided by (Used in) Financing Activities			3,349,241	9,658,095
Cash dividends paid			(235,170)	(210,322)
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities			(332,025)	296,329
Proceeds from Sale of Debt Securities, Available-for-Sale	$ 0	$ 0	$ 0	$ 798,200

Statements of Changes in Capita

Statements of Changes in Capital - 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]
Total capital, beginning balance	$ 5,611,431	$ 5,640,907	$ 5,679,738	$ 4,898,115
Comprehensive Income	164,977	90,773	505,081	405,961
Issuance of capital stock	1,449,646	958,091	3,179,487	4,314,023
Repurchase/redemption of capital stock	(1,186,804)	(1,096,670)	(3,161,817)	(3,888,129)
Capital stock reclassified to mandatorily redeemable capital stock		(5,885)	(5,820)	(13,681)
Cash dividends	(77,751)	(81,249)	(235,170)	(210,322)
Total capital, ending balance	$ 5,961,499	$ 5,505,967	$ 5,961,499	$ 5,505,967
Capital Stock - Putable
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, shares beginning balance	36,695	39,851	39,205	34,284
Total capital, beginning balance	$ 3,669,538	$ 3,985,082	$ 3,920,530	$ 3,428,405
Issuance of capital stock, shares	14,497	9,580	31,795	43,140
Issuance of capital stock	$ 1,449,646	$ 958,091	$ 3,179,487	$ 4,314,023
Repurchase/redemption of capital stock, shares	(11,868)	(10,966)	(31,618)	(38,881)
Repurchase/redemption of capital stock	$ (1,186,804)	$ (1,096,670)	$ (3,161,817)	$ (3,888,129)
Net shares reclassified to mandatorily redeemable capital stock, shares		(59)	(58)	(137)
Capital stock reclassified to mandatorily redeemable capital stock		$ (5,885)	$ (5,820)	$ (13,681)
Balance, shares ending balance	39,324	38,406	39,324	38,406
Total capital, ending balance	$ 3,932,380	$ 3,840,618	$ 3,932,380	$ 3,840,618
Retained Earnings, Unrestricted
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total capital, beginning balance	1,301,470	1,147,317	1,216,323	1,037,182
Comprehensive Income	107,544	124,899	350,110	364,107
Cash dividends	(77,751)	(81,249)	(235,170)	(210,322)
Total capital, ending balance	1,331,263	1,190,967	1,331,263	1,190,967
Retained Earnings, Restricted
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total capital, beginning balance	676,014	558,857	615,373	499,055
Comprehensive Income	26,886	31,225	87,527	91,027
Total capital, ending balance	702,900	590,082	702,900	590,082
Retained Earnings Total
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total capital, beginning balance	1,977,484	1,706,174	1,831,696	1,536,237
Comprehensive Income	134,430	156,124	437,637	455,134
Cash dividends	(77,751)	(81,249)	(235,170)	(210,322)
Total capital, ending balance	2,034,163	1,781,049	2,034,163	1,781,049
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total capital, beginning balance	(35,591)	(50,349)	(72,488)	(66,527)
Comprehensive Income	30,547	(65,351)	67,444	(49,173)
Total capital, ending balance	$ (5,044)	$ (115,700)	$ (5,044)	$ (115,700)

Background Information

Background Information	9 Months Ended
	Sep. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Background Information	Background Information The Bank, a federally chartered corporation, is one of 11 district Federal Home Loan Banks (FHLBanks). Each FHLBank operates as a separate entity with its own management, employees and board of directors. The FHLBanks are government-sponsored enterprises (GSEs) that serve the public by increasing the availability of credit for residential mortgages and community development. The Bank provides a readily available, low-cost source of funds to its member institutions. The Bank is a cooperative, which means that current members own nearly all of the outstanding capital stock of the Bank. All holders of the Bank’s capital stock may, to the extent declared by the Board, receive dividends on their capital stock. Regulated financial depositories and insurance companies engaged in residential housing finance that maintain their principal place of business (as defined by Finance Agency regulation) in Delaware, Pennsylvania or West Virginia may apply for membership. Community Development Financial Institutions (CDFIs) which meet membership regulation standards are also eligible to become Bank members. State and local housing associates that meet certain statutory and regulatory criteria may also borrow from the Bank. While eligible to borrow, state and local housing associates are not members of the Bank and, as such, do not hold capital stock. All members must purchase capital stock in the Bank. The amount of capital stock a member owns is based on membership requirements (membership asset value) and activity requirements (i.e., outstanding advances, letters of credit, and the principal balance of residential mortgage loans sold to the Bank). The Bank considers those members with capital stock outstanding in excess of 10% of total capital stock outstanding to be related parties. See Note 8 - Transactions with Related Parties for additional information. The Federal Housing Finance Agency (Finance Agency), an independent agency in the executive branch of the U.S. government, supervises and regulates the FHLBanks, Federal Home Loan Mortgage Corporation (Freddie Mac), and Federal National Mortgage Association (Fannie Mae). The Finance Agency’s stated mission is to ensure the housing GSEs fulfill their mission by operating in a safe and sound manner to serve as a reliable source for liquidity and funding for the housing finance market throughout the economic cycle. As provided by the Federal Home Loan Bank Act (FHLBank Act) and applicable regulations, consolidated obligations are joint and several obligations of all the FHLBanks and are the primary source of funds for the FHLBanks. These funds are primarily used to provide advances, purchase mortgages from members through the MPF ® Program and purchase certain investments. See Note 6 - Consolidated Obligations for additional information. The Office of Finance (OF) is a joint office of the FHLBanks established to facilitate the issuance and servicing of the consolidated obligations of the FHLBanks and to prepare the combined quarterly and annual financial reports of all the FHLBanks. Deposits, other borrowings, and capital stock issued to members provide other funds. The Bank primarily invests these funds in short-term investments to provide liquidity. The Bank also provides member institutions with correspondent services, such as wire transfer, safekeeping and settlement with the Federal Reserve. Certain amounts in the 2023 financial statements have been reclassified to conform to the current year financial statement presentation. These amounts were not deemed to be material. The accounting and financial reporting policies of the Bank conform to U.S. Generally Accepted Accounting Principles (GAAP). Preparation of the unaudited financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, as well as the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses. Actual results could differ from those estimates. In the opinion of management, all normal recurring adjustments have been included for a fair statement of this interim financial information. These unaudited financial statements should be read in conjunction with the audited financial statements for the year ended December 31, 2023 included in the Bank’s 2023 Form 10-K.

Accounting Adjustments, Changes

Accounting Adjustments, Changes in Accounting Principle and Recently Issued Accounting Standards and Interpretations	9 Months Ended
	Sep. 30, 2024
Accounting Standards Update and Change in Accounting Principle [Abstract]
Accounting Adjustments, Changes in Accounting Principle and Recently Issued Accounting Standards and Interpretations	Changes in Accounting Principle and Recently Issued Accounting Standards and Interpretations The Bank did not adopt any new accounting standards during the nine months ended September 30, 2024.

Advances

Advances	9 Months Ended
	Sep. 30, 2024
Advances [Abstract]
Advances	Advances General Terms. The Bank offers a wide-range of fixed- and variable-rate advance products with different maturities, interest rates, payment characteristics and optionality. Fixed-rate advances generally have maturities ranging from overnight to 30 years. Variable-rate advances generally have maturities ranging up to 30 years, and the interest rates reset periodically at a fixed spread to secured overnight financing rate (SOFR). The following table details the Bank’s advances portfolio by year of redemption and weighted-average interest rate as of September 30, 2024 and December 31, 2023. (dollars in thousands) September 30, 2024 December 31, 2023 Year of Redemption Amount Weighted Average Interest Rate Amount Weighted Average Interest Rate Due in 1 year or less $ 59,628,917 5.02 % $ 46,380,744 5.35 % Due after 1 year through 2 years 11,971,793 4.91 19,483,400 5.17 Due after 2 years through 3 years 5,077,355 4.29 9,308,565 5.24 Due after 3 years through 4 years 2,080,512 4.30 1,909,905 3.97 Due after 4 years through 5 years 379,048 4.65 1,395,177 4.29 Thereafter 159,296 3.38 169,407 3.33 Total par value 79,296,921 4.93 % 78,647,198 5.24 % Deferred prepayment fees (253) (537) Fair value hedging adjustments (31,293) (215,153) Total book value (1) $ 79,265,375 $ 78,431,508 Note : (1) Amounts exclude accrued interest receivable The Bank offers certain advances to members that provide a member the right, based upon predetermined exercise dates, to prepay the advance prior to maturity without incurring prepayment or termination fees (returnable advances). At September 30, 2024 and December 31, 2023, the Bank did not have any advances with embedded features that met the requirements to separate the embedded feature from the host contract and designate the embedded feature as a stand-alone derivative. The following table summarizes advances by the earlier of year of redemption or next call date as of September 30, 2024 and December 31, 2023. Year of Redemption or Next Call Date (in thousands) September 30, 2024 December 31, 2023 Due in 1 year or less $ 59,823,917 $ 46,420,744 Due after 1 year through 2 years 11,966,793 19,458,400 Due after 2 years through 3 years 5,054,855 9,293,565 Due after 3 years through 4 years 2,028,012 1,909,905 Due after 4 years through 5 years 264,048 1,395,177 Thereafter 159,296 169,407 Total par value $ 79,296,921 $ 78,647,198 Interest Rate Payment Terms. The following table details interest rate payment terms by year of redemption for advances as of September 30, 2024 and December 31, 2023. (in thousands) September 30, 2024 December 31, 2023 Fixed-rate – overnight $ 2,248,697 $ 1,739,567 Fixed-rate – term: Due in 1 year or less 11,598,494 15,218,445 Thereafter 10,163,004 13,216,455 Total fixed-rate 24,010,195 30,174,467 Variable-rate: Due in 1 year or less 45,781,726 29,422,731 Thereafter 9,505,000 19,050,000 Total variable-rate 55,286,726 48,472,731 Total par value $ 79,296,921 $ 78,647,198 Credit Risk Exposure and Security Terms. The Bank’s potential credit risk from advances is primarily concentrated in commercial banks. As of September 30, 2024, the Bank had advances of $64.1 billion outstanding to the five largest borrowers, which represented 80.8% of the total principal amount of advances outstanding. Of those five, two had outstanding advance balances that were in excess of 10% of the total portfolio at September 30, 2024. As of December 31, 2023, the Bank had advances of $62.4 billion outstanding to the five largest borrowers, which represented 79.3% of the total principal amount of advances outstanding. Of these five, two had outstanding advance balances that were in excess of 10% of the total portfolio at December 31, 2023. Advances ACL. The Bank manages its total credit exposure (TCE), which includes advances, letters of credit, advance commitments, and other credit product exposure, through an integrated approach. This approach generally requires a credit limit to be established for each borrower and an ongoing review of each borrower’s financial condition in conjunction with the Bank’s collateral and lending policies to limit risk of loss while balancing each borrower's need for a reliable source of funding. Eligible collateral and collateral requirements can vary based on the type of member: commercial banks, insurance companies, credit unions, de novo banks and CDFIs. In addition, the Bank lends to its members in accordance with the FHLBank Act and Finance Agency regulations. Specifically, the FHLBank Act requires the Bank to obtain collateral to fully secure credit products. The estimated value of the collateral required to secure each member’s credit products is calculated by applying collateral weightings, or haircuts, to the value of the collateral. The Bank primarily accepts cash, certain investment securities, residential mortgage loans, and other real estate related assets as collateral. In addition, Community Financial Institutions (CFIs) are eligible to utilize expanded statutory collateral provisions for small business, agriculture, and community development loans. The Bank’s capital stock owned by the borrowing member is pledged as secondary collateral. Collateral arrangements may vary depending upon borrower credit quality, financial condition and performance, borrowing capacity, and overall credit exposure to the borrower. The Bank can require additional or substitute collateral to help ensure that credit products continue to be secured by adequate collateral. Management of the Bank believes that these policies effectively manage the Bank’s credit risk from credit products. Based upon the financial condition of the member, the Bank either allows a member to retain physical possession of the collateral assigned to the Bank or requires the member to specifically deliver physical possession or control of the collateral to the Bank or its custodians. However, regardless of the member’s financial condition, the Bank always takes possession or control of securities used as collateral. The Bank perfects its security interest in all pledged collateral. The FHLBank Act affords any security interest granted to the Bank by a member (or an affiliate of a member) priority over the claims or rights of any other party, except for claims or rights of a third-party that would be otherwise entitled to priority under applicable law and that are held by a bona fide purchaser for value or by a secured party holding a prior perfected security interest. Using a risk-based approach, the Bank considers the payment status, collateral types and concentration levels, and borrower’s financial condition to be indicators of credit quality on its credit products. The Bank’s assessment of a member’s financial condition may require certain risk mitigation actions, including reduced collateral weights, delivery of pledged collateral, reduced advance tenor, and change in availability of certain credit products. At September 30, 2024 and December 31, 2023, the Bank had rights to collateral on a member-by-member basis with a value in excess of its outstanding extensions of credit. The Bank continues to evaluate and, as necessary, make changes to its collateral guidelines based on current market conditions. At September 30, 2024 and December 31, 2023, the Bank did not have any credit products that were past due, on nonaccrual status, or considered impaired. In addition, the Bank did not have any modifications related to advances with borrowers experiencing financial difficulties during the first nine months of 2024. The Bank evaluates its advances for an ACL on a collective, or pooled, basis unless an individual assessment is deemed necessary because the instruments do not possess similar risk characteristics. The Bank pools advances by member type, as noted above. Based on the collateral held as security, the Bank’s credit extension and collateral policies and repayment history on advances, including that the Bank has not incurred any credit losses since inception, the Bank has not recorded an ACL at September 30, 2024 or 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	Mortgage Loans Held for Portfolio Under the MPF Program, the Bank invests in mortgage loans that it purchases from its participating members and housing associates. The Bank’s participating members originate, service, and credit enhance residential mortgage loans that are sold to the Bank. See Note 8 for further information regarding transactions with related parties. The following table presents balances as of September 30, 2024 and December 31, 2023 for mortgage loans held for portfolio. (in thousands) September 30, 2024 December 31, 2023 Fixed-rate long-term single-family mortgages (1) $ 4,595,698 $ 4,527,088 Fixed-rate medium-term single-family mortgages (2) 100,505 116,527 Total par value 4,696,203 4,643,615 Premiums 66,838 68,667 Discounts (11,699) (11,968) Hedging adjustments (2,206) 456 Total mortgage loans held for portfolio (3) $ 4,749,136 $ 4,700,770 Allowance for credit losses on mortgage loans (2,394) (3,018) Mortgage loans held for portfolio, net $ 4,746,742 $ 4,697,752 Notes: (1) Long-term is defined as an original term of greater than 15 years and up to 30 years. (2) Medium-term is defined as an original term of 15 years or less. (3) Amounts exclude accrued interest receivable The following table details the par value of mortgage loans held for portfolio outstanding categorized by type as of September 30, 2024 and December 31, 2023. (in thousands) September 30, 2024 December 31, 2023 Conventional loans $ 4,600,966 $ 4,539,983 Government-guaranteed/insured loans 95,237 103,632 Total par value $ 4,696,203 $ 4,643,615 Conventional MPF Loans - Credit Enhancements (CE). The conventional MPF loans held for portfolio are required to be credit enhanced as determined through the use of a validated model so the risk of loss is limited to the losses within the Bank’s risk tolerance. The Bank and its PFIs share the risk of credit losses on conventional MPF loan products held for portfolio, by structuring potential losses into layers with respect to each master commitment. After considering the borrower’s equity and any PMI, credit losses on mortgage loans in a master commitment are then absorbed by the Bank’s FLA. If applicable to the MPF product, the Bank will withhold a PFI’s scheduled performance CE fee in order to reimburse the Bank for any losses allocated to the FLA (recaptured CE Fees). If the FLA is exhausted, the credit losses are then absorbed by the PFI up to an agreed upon CE amount. The CE amount could be covered by SMI obtained by the PFI. Thereafter, any remaining credit losses are absorbed by the Bank. Payment Status of Mortgage Loans. Payment status is the key credit quality indicator for conventional mortgage loans and allows the Bank to monitor the migration of past due loans. Past due loans are those where the borrower has failed to make timely payments of principal and/or interest in accordance with the terms of the loan. Other delinquency statistics include nonaccrual loans and loans in process of foreclosure. Credit Quality Indicator for Conventional Mortgage Loans. The following table presents the payment status for conventional mortgage loans at September 30, 2024 and December 31, 2023. September 30, 2024 (in thousands) Origination Year Payment Status, at amortized cost (1) Prior to 2020 2020 to 2024 Total Past due 30-59 days $ 22,807 $ 16,600 $ 39,407 Past due 60-89 days 8,026 6,984 15,010 Past due 90 days or more 11,780 7,999 19,779 Total past due loans $ 42,613 $ 31,583 $ 74,196 Current loans 1,479,718 3,098,003 4,577,721 Total conventional loans $ 1,522,331 $ 3,129,586 $ 4,651,917 December 31, 2023 Origination Year Payment Status, at amortized cost (1) Prior to 2019 2019 to 2023 Total Past due 30-59 days $ 18,132 $ 20,959 $ 39,091 Past due 60-89 days 6,372 9,740 16,112 Past due 90 days or more 8,932 9,171 18,103 Total past due loans $ 33,436 $ 39,870 $ 73,306 Current loans 1,148,754 3,372,849 4,521,603 Total conventional loans $ 1,182,190 $ 3,412,719 $ 4,594,909 Note: (1) The amortized cost at September 30, 2024 and December 31, 2023 excludes accrued interest receivable. Other Delinquency Statistics. The following table presents the delinquency statistics for the Bank’s mortgage loans at September 30, 2024 and December 31, 2023. September 30, 2024 (dollars in thousands) (1) Conventional MPF Loans Government-Guaranteed or Insured Loans Total In process of foreclosures, included above (2) $ 5,013 $ 516 $ 5,529 Serious delinquency rate (3) 0.4 % 2.4 % 0.5 % Past due 90 days or more still accruing interest $ — $ 2,350 $ 2,350 Loans on nonaccrual status $ 24,210 $ — $ 24,210 December 31, 2023 (dollars in thousands) (1) Conventional MPF Loans Government-Guaranteed or Insured Loans Total In process of foreclosures, included above (2) $ 5,932 $ 960 $ 6,892 Serious delinquency rate (3) 0.4 % 2.0 % 0.4 % Past due 90 days or more still accruing interest $ — $ 2,137 $ 2,137 Loans on nonaccrual status $ 23,002 $ — $ 23,002 Notes: (1) Amounts presented at amortized cost. (2) Includes loans where the decision of foreclosure or similar alternative such as pursuit of deed-in-lieu has been reported. Loans in process of foreclosure are included in past due or current loans dependent on their delinquency status. (3) Loans that are 90 days or more past due or in the process of foreclosure expressed as a percentage of the total loan portfolio class. Mortgage Loans Held for Portfolio ACL. Conventional MPF - Expected Losses. Conventional loans are evaluated collectively when similar risk characteristics exist. Conventional loans that do not share risk characteristics with other pools are evaluated for expected credit losses on an individual basis. The Bank determines its allowances for credit losses on conventional loans through analyses that include consideration of various loan portfolio and collateral-related characteristics, such as past performance, current conditions, and reasonable and supportable forecasts of expected economic conditions. The Bank uses a third-party model to estimate expected credit losses over the life of the loans. The estimate of the expected credit losses includes coverage of certain losses by PMI, if applicable. The model relies on a number of inputs, such as housing price forecasts, interest rates, and unemployment rates, as well as historical borrower behavior experience. The Bank’s reasonable and supportable forecast for housing prices is two years. The Bank then reverts to historic averages over a three year period. The Bank may incorporate a qualitative adjustment to the model results, if deemed appropriate, based on current market conditions or results. The estimated credit loss on collateral dependent loans is charged-off against the reserve. However, if the estimated loss can be recovered through CE, a receivable is established, resulting in a net charge-off. A mortgage loan is considered collateral dependent when the borrower is experiencing financial difficulty and repayment is expected to be substantially through the sale of the underlying collateral. The expected credit loss of a collateral dependent mortgage loan to determine the charge-off is equal to the difference between the amortized cost of the loan and the estimated fair value of the collateral, less estimated selling costs. The estimate of the expected credit losses includes coverage of certain losses by PMI, if applicable. The estimated fair value of the collateral is determined based on a value provided by a third-party’s retail-based Automated Valuation Model (AVM). The Bank adjusts the AVM based on the amount it has historically received on liquidations. Expected recoveries of prior charge-offs, as determined by a third-party model, if any, are included in the allowance for credit losses. Conventional MPF - Expected Recoveries. The Bank recognizes a recovery through the provision (reversal) for credit losses when expected lifetime credit losses are less than the amounts previously charged-off. This includes potentially recording a negative ACL for certain of the Bank’s MPF products. The reduction to the ACL for expected recoveries is partially offset by a reversal of expected CE, resulting in a net impact to the Bank’s Statements of Condition. Conventional MPF - Application of CE. The Bank also incorporates associated CE, if any, to determine its estimate of expected credit losses. The Bank records an ACL for expected credit losses that exceed the amount the Bank expects to receive from available CE. Potential recoveries from CE for conventional loans are evaluated at the individual master commitment level to determine the CE available to recover losses on loans under each individual master commitment. Conventional MPF - Rollforward of ACL Three months ended September 30, Nine months ended September 30, (in thousands) 2024 2023 2024 2023 Balance, beginning of period $ 2,694 $ 3,256 $ 3,018 $ 3,240 (Charge-offs) Recoveries, net (1) (342) (21) (698) 9 Provision (reversal) for credit losses 42 (264) 74 (278) Balance, end of period $ 2,394 $ 2,971 $ 2,394 $ 2,971 Note: (1) Net charge-offs that the Bank does not expect to recover through CE receivable. Government-Guaranteed or -Insured Mortgage Loans. The Bank invests in government-guaranteed or insured fixed-rate mortgage loans secured by one-to-four family residential properties. Government-guaranteed or insured mortgage loans are those insured or guaranteed by the Federal Housing Administration (FHA), Department of Veterans Affairs (VA), the Rural Housing Service (RHS) of the Department of Agriculture and/or by 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 guarantee or insurance with respect to defaulted government-guaranteed or -insured mortgage loans. Any losses on these loans that are not recovered from the issuer or the guarantor are absorbed by the servicer. Therefore, the Bank only has credit risk for these loans if the servicer fails to pay for losses not covered by the guarantee or insurance, but in such instance, the Bank would have recourse against the servicer for such failure. Based on the Bank’s assessment of its servicers and the collateral backing the loans, the risk of loss was immaterial. Consequently, the Bank has not recorded an ACL for government-guaranteed or -insured mortgage loans at September 30, 2024 or December 31, 2023. Furthermore, none of these mortgage loans have been placed on non-accrual status because of the U.S. government guarantee or insurance on these loans and the contractual obligation of the loan servicer to repurchase the loans when certain criteria are met. Real Estate Owned (REO) . The amount of REO reported in Other assets on the Statements of Condition was immaterial at both September 30, 2024 and December 31, 2023.

Consolidated Obligations

Consolidated Obligations	9 Months Ended
	Sep. 30, 2024
Debt Disclosure [Abstract]
Consolidated Obligations	Consolidated Obligations Consolidated obligations consist of bonds and discount notes. The FHLBanks issue consolidated obligations through the OF as their agent. In connection with each debt issuance, each FHLBank specifies the amount of debt it wants to have issued on its behalf. The OF tracks the amount of debt issued on behalf of each FHLBank. The Bank records as a liability its specific portion of consolidated obligations for which it is the primary obligor. The Finance Agency and the U.S. Secretary of the Treasury oversee the issuance of FHLBank debt through the OF. Bonds may be issued to raise short-, intermediate-, and long-term funds for the FHLBanks and are not subject to any statutory or regulatory limits on their maturity. Discount notes are issued primarily to raise short-term funds and have original maturities of up to one year. These notes generally sell at less than their face amount and are redeemed at par value when they mature. Although the Bank is primarily liable for its portion of consolidated obligations, the Bank is also jointly and severally liable with the other ten FHLBanks for the payment of principal and interest on all consolidated obligations of each of the FHLBanks. The Finance Agency, at its discretion, may require any FHLBank to make principal or interest payments due on any consolidated obligations whether or not the consolidated obligation represents a primary liability of such FHLBank. Although an FHLBank has never paid the principal or interest payments due on a consolidated obligation on behalf of another FHLBank, if one FHLBank is required to make such payments, Finance Agency regulations provide that the paying FHLBank is entitled to reimbursement from the non-complying FHLBank for any payments made on its behalf and other associated costs including interest to be determined by the Finance Agency. If the Finance Agency determines that the non-complying FHLBank is unable to satisfy its repayment obligations, then the Finance Agency may allocate the outstanding liabilities of the non-complying FHLBank among the remaining FHLBanks on a pro rata basis in proportion to each FHLBank’s participation in all consolidated obligations outstanding. However, the Finance Agency reserves the right to allocate the outstanding liabilities for the consolidated obligations among the FHLBanks in any other manner it may determine to ensure that the FHLBanks operate in a safe and sound manner. The par amounts of the 11 FHLBanks’ outstanding consolidated obligations w ere $1,172.8 billion at September 30, 2024 and $1,204.3 billion at December 31, 2023. Additional detailed information regarding consolidated obligations including general terms and interest rate payment terms can be found in Note 9 to the audited financial statements in the Bank’s 2023 Form 10-K. The following table details interest rate payment terms for the Bank’s consolidated obligation bonds as of September 30, 2024 and December 31, 2023. (in thousands) September 30, 2024 December 31, 2023 Par value of consolidated bonds: Fixed-rate $ 33,728,315 $ 60,032,810 Step-up 1,590,000 2,034,000 Floating-rate 63,478,900 29,338,900 Total par value $ 98,797,215 $ 91,405,710 Maturity Terms. The following table presents a summary of the Bank’s consolidated obligation bonds outstanding by year of contractual maturity and weighted-average interest rate at September 30, 2024 and December 31, 2023. September 30, 2024 December 31, 2023 (dollars in thousands) Amount Weighted Average Interest Rate Amount Weighted Average Interest Rate Due in 1 year or less $ 79,045,455 4.72 % $ 62,578,585 4.89 % Due after 1 year through 2 years 8,013,900 2.67 13,255,965 4.63 Due after 2 years through 3 years 4,409,200 2.56 8,010,800 1.94 Due after 3 years through 4 years 2,418,250 3.64 2,178,600 3.30 Due after 4 years through 5 years 1,768,410 4.25 2,262,125 3.59 Thereafter 3,142,000 3.05 3,119,635 2.87 Total par value $ 98,797,215 4.37 % $ 91,405,710 4.46 % Bond premiums $ 23,196 $ 34,145 Bond discounts (9,534) (13,419) Concession fees (6,511) (6,484) Fair value hedging adjustments (275,549) (618,920) Total book value $ 98,528,817 $ 90,801,032 The following table presents the Bank’s consolidated obligation bonds outstanding between noncallable and callable as of September 30, 2024 and December 31, 2023. (in thousands) September 30, 2024 December 31, 2023 Noncallable $ 71,758,715 $ 51,242,210 Callable 27,038,500 40,163,500 Total par value $ 98,797,215 $ 91,405,710 The following table presents consolidated obligation bonds outstanding by the earlier of contractual maturity or next call date as of September 30, 2024 and December 31, 2023. (in thousands) September 30, 2024 December 31, 2023 Due in 1 year or less $ 90,664,955 $ 75,974,085 Due after 1 year through 2 years 4,179,400 10,202,465 Due after 2 years through 3 years 1,090,200 2,122,800 Due after 3 years through 4 years 1,557,250 650,600 Due after 4 years through 5 years 534,410 1,552,125 Thereafter 771,000 903,635 Total par value $ 98,797,215 $ 91,405,710 Consolidated Obligation Discount Notes. Consolidated obligation discount notes are issued to raise short-term funds. Discount notes are consolidated obligations with original maturities up to one year. These notes are issued at less than their face amount and redeemed at par value when they mature. The following table details the Bank’s consolidated obligation discount notes as of September 30, 2024 and December 31, 2023. (dollars in thousands) September 30, 2024 December 31, 2023 Book value $ 9,776,014 $ 13,683,580 Par value $ 9,810,114 $ 13,806,118 Weighted average interest rate (1) 5.00 % 5.36 % Note: (1) Represents yield to maturity excluding concession fees and hedging adjustments.

Transactions with Related Parti

Transactions with Related Parties	9 Months Ended
	Sep. 30, 2024
Related Party Transactions [Abstract]
Transactions with Related Parties	Transactions with Related Parties The following table includes significant outstanding related party member-activity balances. (in thousands) September 30, 2024 December 31, 2023 Advances (1) $ 53,712,016 $ 45,435,931 Letters of credit (2) 20,190,928 20,225,736 MPF loans 287,805 202,529 Deposits 25,971 40,129 Capital stock 2,407,520 2,038,033 Notes: (1) Amount excludes accrued interest, deferred prepayment fees, and hedging adjustment (2) Letters of credit are off-balance sheet commitments. The following table summarizes the effects on the Statements of Income corresponding to the related party member balances above. Amounts related to interest expense on deposits were immaterial for the periods presented. Three months ended September 30, Nine months ended September 30, (in thousands) 2024 2023 2024 2023 Interest income on advances (1) $ 707,827 $ 601,408 $ 2,006,556 $ 1,824,881 Interest income on MPF loans 3,147 2,628 7,795 8,216 Letters of credit fees 6,112 8,067 17,946 19,127 Note: (1) Interest income on advances includes contractual interest income and prepayment fees. The effect of derivative activities is not included. The following table summarizes the effect of the MPF activities with FHLBank of Chicago. Three months ended September 30, Nine months ended September 30, (in thousands) 2024 2023 2024 2023 Servicing fee expense $ 987 $ 952 $ 2,944 $ 2,833 (in thousands) September 30, 2024 December 31, 2023 Interest-bearing deposits maintained with FHLBank of Chicago $ 5,616 $ 6,075 From time to time, the Bank may borrow from or lend to other FHLBanks on a short-term uncollateralized basis. The amount loaned by the Bank to other FHLBanks and repaid was none during the three and nine months ended September 30, 2024 and none during the three months and $750 million during the nine months ended September 30, 2023. There was no amount borrowed from and repaid to other FHLBanks during the three and nine months ended September 30, 2024 and no amount borrowed during the three and nine months ended September 30, 2023. Subject to mutually agreed upon terms, on occasion, an FHLBank may transfer at fair value its primary debt obligations to another FHLBank. During the three months ended September 30, 2024 there was none, and for the nine months ended September 30, 2024 there was an immaterial amount of transfers of debt between the Bank and another FHLBank. There are no such transfer of debt during the three and nine months ended September 30, 2023 From time to time, a member of one FHLBank may be acquired by a member of another FHLBank. When such an acquisition occurs, the two FHLBanks may agree to transfer at fair value the loans of the acquired member to the FHLBank of the surviving member. The FHLBanks may also agree to the purchase and sale of any related hedging instrument. The Bank had no such activity during the three and nine months ended September 30, 2024 and 2023. In the ordinary course of business, the Bank may utilize products and services, provided at normal market rates and terms, from its members to support its operations. Additional discussions regarding related party transactions can be found in Note 13 to the audited financial statements in the Bank’s 2023 Form 10-K.

Estimated Fair Values

Estimated Fair Values	9 Months Ended
	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Estimated Fair Values	Estimated Fair Values Fair value amounts have been determined by the Bank using available market information and appropriate valuation methods. GAAP defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (i.e., an exit price). These estimates are based on recent market data and other pertinent information available to the Bank at September 30, 2024 and December 31, 2023. Although the management of the Bank believes that the valuation methods are appropriate and provide a reasonable determination of the fair value of these financial instruments, there are inherent limitations in any valuation technique. Therefore, these fair values are not necessarily equal to the amounts that would be realized in current market transactions, although they do reflect the Bank’s judgment of how a market participant would estimate the fair values. The carrying value and estimated fair value of the Bank’s financial instruments at September 30, 2024 and December 31, 2023 are presented in the table below. Fair Value Summary Table September 30, 2024 (in thousands) Carrying Level 1 Level 2 Level 3 Netting Adjustment and Cash Collateral (1) Estimated Assets: Cash and due from banks $ 17,391 $ 17,391 $ — $ — $ — $ 17,391 Interest-bearing deposits 3,115,630 3,115,630 — — — 3,115,630 Securities purchased under agreements to resell (2) 4,780,000 — 4,780,006 — — 4,780,006 Federal funds sold 3,542,000 — 3,542,003 — — 3,542,003 Trading securities 156,729 — 156,729 — — 156,729 AFS securities 17,904,881 — 17,785,526 119,355 — 17,904,881 HTM securities 1,384,587 — 1,296,122 37,072 — 1,333,194 Advances 79,265,375 — 79,277,746 — — 79,277,746 Mortgage loans held for portfolio, net 4,746,742 — 4,312,900 — — 4,312,900 Accrued interest receivable 538,812 — 538,812 — — 538,812 Derivative assets 409,878 — 104,911 — 304,967 409,878 Liabilities: Deposits $ 704,863 $ — $ 704,863 $ — $ — $ 704,863 Discount notes 9,776,014 — 9,776,381 — — 9,776,381 Bonds 98,528,817 — 98,063,403 — — 98,063,403 Mandatorily redeemable capital stock (3) 27,554 28,175 — — — 28,175 Accrued interest payable (3) 625,184 — 624,563 — — 624,563 Derivative liabilities 12,087 — 358,625 — (346,538) 12,087 December 31, 2023 (in thousands) Carrying Level 1 Level 2 Level 3 Netting Adjustment and Cash Collateral (1) Estimated Assets: Cash and due from banks $ 11,509 $ 11,509 $ — $ — $ — $ 11,509 Interest-bearing deposits 3,110,803 3,110,803 — — — 3,110,803 Securities purchased under agreements to resell (2) 5,980,000 — 5,979,957 — — 5,979,957 Federal funds sold 2,533,000 — 2,532,983 — — 2,532,983 Trading securities 217,722 — 217,722 — — 217,722 AFS securities 14,822,933 — 14,697,125 125,808 — 14,822,933 HTM securities 1,339,759 — 1,231,090 41,656 — 1,272,746 Advances 78,431,508 — 78,364,403 — — 78,364,403 Mortgage loans held for portfolio, net 4,697,752 — 4,236,537 — — 4,236,537 Accrued interest receivable 517,361 — 517,361 — — 517,361 Derivative assets 408,507 — 206,615 — 201,892 408,507 Liabilities: Deposits $ 636,726 $ — $ 636,726 $ — $ — $ 636,726 Discount notes 13,683,580 — 13,678,683 — — 13,678,683 Bonds 90,801,032 — 90,267,686 — — 90,267,686 Mandatorily redeemable capital stock (3) 27,874 28,468 — — — 28,468 Accrued interest payable (3) 753,663 — 753,069 — — 753,069 Derivative liabilities 7,334 — 650,673 — (643,339) 7,334 Notes: (1) Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions and also cash collateral held and related interest accrued or placed by the Bank with the same clearing agent and/or counterparties. (2) Based on the fair value of the related collateral held, the securities purchased under agreements to resell were fully collateralized for the periods presented. There were no offsetting liabilities related to these securities at September 30, 2024 and December 31, 2023. These instruments’ maturity term is overnight. (3) The estimated fair value amount for the mandatorily redeemable capital stock line item includes accrued dividend interest; this amount is excluded from the estimated fair value for the accrued interest payable line item. Fair Value Hierarchy. The fair value hierarchy is used to prioritize the inputs used to measure fair value by maximizing the use of observable inputs. The inputs are evaluated and an overall level for the fair value measurement is determined. This overall level is an indication of the market observability of the fair value measurement for the asset or liability. The fair value hierarchy prioritizes the inputs used to measure fair value into three broad levels: Level 1 Inputs - Quoted prices (unadjusted) for identical assets or liabilities in an active market that the reporting entity can access on the measurement date. An active market for the asset or liability is a market in which the transactions for the asset or liability occur with sufficient frequency and volume to provide pricing information on an ongoing basis. Level 2 Inputs - Inputs other than quoted prices within Level 1 that are observable inputs for the asset or liability, either directly or indirectly. If the asset or liability has a specified (contractual) term, a Level 2 input must be observable for substantially the full term of the asset or liability. Level 2 inputs include the following: (1) quoted prices for similar assets or liabilities in active markets; (2) quoted prices for identical or similar assets or liabilities in markets that are not active or in which little information is released publicly; (3) inputs other than quoted prices that are observable for the asset or liability (e.g., interest rates and yield curves that are observable at commonly quoted intervals, and implied volatilities) and (4) inputs that are derived principally from or corroborated by observable market data by correlation or other means. Level 3 Inputs - Valuations derived from techniques in which one or more significant inputs are not observable in the market. Valuation techniques include pricing models, discounted cash flow methodologies or similar techniques. The Bank reviews its fair value hierarchy classifications on a quarterly basis. Changes in the observability of the valuation inputs may result in a reclassification of certain assets or liabilities. Summary of Valuation Methodologies and Primary Inputs The valuation methodologies and primary inputs used to develop the measurement of fair value for assets and liabilities that are measured at fair value on a recurring or nonrecurring basis in the Statements of Condition are listed below. Investment Securities – non-MBS. The Bank uses either the income or market approach to determine the estimated fair value of non-MBS investment securities. For instruments that use the income approach, the significant inputs include a market-observable interest rate curve and a discount spread, if applicable. The market-observable interest rate curves and the related instrument types are as follows: ▪ CO curve: GSE and other U.S. obligations The Bank uses a market approach for its state and local agency bonds and U.S. Treasury obligations. For state and local agency bonds, the Bank obtains prices from multiple designated third-party vendors when available, and the default price is the average of the prices obtained. Otherwise, the approach is generally consistent with the approach outlined below for Investment Securities - MBS. For U.S. Treasury obligations, prices are obtained from a third-party vendor based on daily trade activity or dealer quotes. For certain short-term U.S. Treasury obligations, market prices are not available, and the Bank uses an income approach. Investment Securities – MBS. To value MBS holdings, the Bank obtains prices from multiple third-party pricing vendors, when available. The pricing vendors use various proprietary models to price MBS. The inputs to those models are derived from various sources including, but not limited to: benchmark yields, reported trades, dealer estimates, issuer spreads, benchmark securities, bids, offers and other market-related data. Since many MBS do not trade on a daily basis, the pricing vendors use available information such as benchmark curves, benchmarking of like securities, sector groupings and matrix pricing to determine the prices for individual securities, as applicable. Each pricing vendor has an established challenge process in place for all MBS valuations, which facilitates resolution of potentially erroneous prices identified by the Bank. During the year, the Bank conducts reviews of its pricing vendors to enhance its understanding of the vendors' pricing processes, methodologies and control procedures. To the extent available, the Bank also reviews the vendors' independent auditors' reports regarding the internal controls over their valuation processes. The Bank’s valuation technique first requires the establishment of a median price for each security. All prices that are within a specified tolerance threshold of the median price are included in the cluster of prices that are averaged to compute a default price. Prices that are outside the threshold (outliers) are subject to further analysis (including, but not limited to, comparison to prices provided by an additional third-party valuation service, prices for similar securities, and/or non-binding dealer estimates) to determine if an outlier is a better estimate of fair value. If an outlier (or some other price identified in the analysis) is determined to be a better estimate of fair value, then the outlier (or the other price as appropriate) is used as the price rather than the default price. If, on the other hand, the analysis confirms that an outlier (or outliers) is (are) in fact not representative of fair value and the default price is the best estimate, then the default price is used as the final price. In all cases, the final price is used to determine the fair value of the security. If all prices received for a security are outside the tolerance threshold level of the median price, then there is no default price, and the final price is determined by an evaluation of all outlier prices as described above. As of September 30, 2024, for substantially all of its MBS, the Bank received a price from all of its vendors and the default price was the final price. Based on the Bank’s reviews of the pricing methods including inputs and controls employed by the third-party pricing vendors and the relative lack of dispersion among the vendor prices (or, in those instances in which there were outliers or significant yield variances, the Bank’s additional analyses), the Bank believes the final prices are representative of the prices that would have been received if the assets had been sold at the measurement date (i.e., exit prices) and further that the fair value measurements are classified appropriately in the fair value hierarchy. There continues to be unobservable inputs and a lack of significant market activity for private label MBS; therefore, the Bank classified private label MBS as Level 3. Derivative Assets/Liabilities. The Bank bases the fair values of derivatives with similar terms on market prices, when available. However, market prices do not exist for many types of derivative instruments. Consequently, fair values for these instruments are estimated using standard valuation techniques such as discounted cash flow analysis and comparisons to similar instruments. Estimates developed using these methods are highly subjective and require judgment regarding significant matters such as the amount and timing of future cash flows, volatility of interest rates and the selection of discount rates that appropriately reflect market and credit risks. In addition, the fair value estimates for these instruments include accrued interest receivable/payable which approximate their carrying values due to their short-term nature. The discounted cash flow analysis used to determine the net present value of derivative instruments utilizes market-observable inputs (inputs that are actively quoted and can be validated to external sources). Inputs by class of derivative are as follows: Interest-rate related: ▪ Discount rate assumption. SOFR curve for SOFR indexed derivatives. Overnight Index Swap (OIS) curve for OIS indexed derivatives. ▪ Forward interest rate assumption (rates projected in order to calculate cash flows through the designated term of the hedge relationship). OIS curve or SOFR curve. ▪ Volatility assumption. Market-based expectations of future interest rate volatility implied from current market prices for similar options. Mortgage delivery commitments: ▪ TBA securities prices. Market-based prices of TBAs are determined by coupon class and expected term until settlement and a pricing adjustment reflective of the secondary mortgage market. The Bank is subject to credit risk on uncleared derivatives transactions due to the potential nonperformance by the derivatives counterparties. To mitigate this risk, the Bank has entered into netting arrangements and security agreements that provide for delivery of collateral at specified levels. As a result, uncleared derivatives are recognized as collateralized-to-market and the fair value of uncleared derivatives excludes netting adjustments and collateral. The Bank has evaluated the potential for fair value adjustment due to uncleared counterparty credit risk and has concluded that no adjustments are necessary. Credit risk related to uncleared derivatives may be further mitigated by the change of initial margin with the Bank’s derivative counterparties. However, as of September 30, 2024, the Bank did not exceed initial margin thresholds with any of its counterparties and was not required to post initial margin. If the Bank’s aggregate uncleared derivative transactions exposure to a counterparty exceeds the applicable threshold, certain investment securities are required to be posted and held at a third-party custodian. The Bank’s credit risk exposure on cleared derivatives is mitigated through the delivery of initial margin to offset future changes in value and daily delivery of variation margin to offset changes in market value. This is executed through the use of a central counterparty, either CME clearing or LCH Ltd. Variation margin payments are daily settlement payments rather than collateral. Initial margin continues to be treated as collateral and accounted for separately. The fair values of derivatives are netted by clearing agent and/or by counterparty pursuant to the provisions of each of the Bank’s netting agreements. If these netted amounts are positive, they are classified as an asset and, if negative, as a liability. Impaired Mortgage Loans Held for Portfolio and REO. The estimated fair values of impaired mortgage loans held for portfolio and real estate owned are determined based on values provided by a third-party’s retail-based AVM. The Bank adjusts the AVM value based on the amount it has historically received on liquidation. Subjectivity of Estimates. Estimates of the fair value of financial assets and liabilities using the methods described above are highly subjective and require judgments regarding significant matters such as the amount and timing of future cash flows, prepayment speed assumptions, expected interest rate volatility, possible distributions of future interest rates used to value options, and the selection of discount rates that appropriately reflect market and credit risks. The use of different assumptions could have a material effect on the fair value estimates. These estimates are susceptible to material near term changes because they are made as of a specific point in time. Fair Value Measurements. The following tables present, for each hierarchy level, the Bank’s assets and liabilities that are measured at fair value on a recurring or non-recurring basis on its Statements of Condition at September 30, 2024 and December 31, 2023. The Bank measures certain mortgage loans held for portfolio at fair value when a charge-off is recognized and subsequently when the fair value of collateral less costs to sell is lower than the carrying amount. Real estate owned is measured using fair value when the assets' fair value less costs to sell is lower than the carrying amount. September 30, 2024 (in thousands) Level 1 Level 2 Level 3 Netting Adjustment and Cash Collateral (1) Total Recurring fair value measurements - Assets Trading securities: Non MBS: GSE obligations $ — $ 156,729 $ — $ — $ 156,729 Total trading securities $ — $ 156,729 $ — $ — $ 156,729 AFS securities: Non MBS: U.S. Treasury obligations $ — $ 4,172,234 $ — $ — $ 4,172,234 GSE and TVA obligations — 938,989 — — 938,989 State or local agency obligations — 174,301 — — 174,301 MBS: U.S. obligations single-family — 1,894,417 — — 1,894,417 GSE single-family — 4,090,237 — — 4,090,237 GSE multifamily — 6,515,348 — — 6,515,348 Private label — — 119,355 — 119,355 Total AFS securities $ — $ 17,785,526 $ 119,355 $ — $ 17,904,881 Derivative assets: Interest rate related $ — $ 104,911 $ — $ 304,967 $ 409,878 Total derivative assets — 104,911 — 304,967 409,878 Total recurring assets at fair value $ — $ 18,047,166 $ 119,355 $ 304,967 $ 18,471,488 Recurring fair value measurements - Liabilities Derivative liabilities: Interest rate related $ — $ 358,233 $ — $ (346,538) $ 11,695 Mortgage delivery commitments — 392 — — 392 Total recurring liabilities at fair value $ — $ 358,625 $ — $ (346,538) $ 12,087 Non-recurring fair value measurements - Assets Impaired mortgage loans held for portfolio $ — $ — $ 6,168 $ — $ 6,168 REO — — 312 — 312 Total non-recurring assets at fair value $ — $ — $ 6,480 $ — $ 6,480 December 31, 2023 (in thousands) Level 1 Level 2 Level 3 Netting Adjustment and Cash Collateral (1) Total Recurring fair value measurements - Assets Trading securities: Non MBS: GSE obligations $ — $ 217,722 $ — $ — $ 217,722 Total trading securities $ — $ 217,722 $ — $ — $ 217,722 AFS securities: Non MBS: U.S. Treasury obligations $ — $ 3,676,037 $ — $ — $ 3,676,037 GSE and TVA obligations — 983,307 — — 983,307 State or local agency obligations — 174,111 — — 174,111 MBS: U.S. obligations single-family — 1,538,389 — — 1,538,389 GSE single-family — 2,047,752 — — 2,047,752 GSE multifamily — 6,277,529 — — 6,277,529 Private label — — 125,808 — 125,808 Total AFS securities $ — $ 14,697,125 $ 125,808 $ — $ 14,822,933 Derivative assets: Interest rate related $ — $ 206,460 $ — $ 201,892 $ 408,352 Mortgage delivery commitments — 155 — — 155 Total derivative assets $ — $ 206,615 $ — $ 201,892 $ 408,507 Total recurring assets at fair value $ — $ 15,121,462 $ 125,808 $ 201,892 $ 15,449,162 Recurring fair value measurements - Liabilities Derivative liabilities: Interest rate related $ — $ 650,647 $ — $ (643,339) $ 7,308 Mortgage delivery commitments — 26 — — 26 Total recurring liabilities at fair value $ — $ 650,673 $ — $ (643,339) $ 7,334 Non-recurring fair value measurements - Assets Impaired mortgage loans held for portfolio $ — $ — $ 6,859 $ — $ 6,859 REO — — 290 — 290 Total non-recurring assets at fair value $ — $ — $ 7,149 $ — $ 7,149 Note: (1) Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions and also cash collateral and related accrued interest held or placed by the Bank with the same clearing agent and/or counterparties. Level 3 Disclosures for all Assets and Liabilities That Are Measured at Fair Value on a Recurring Basis. The following table presents a reconciliation of all assets and liabilities that are measured at fair value on the Statements of Condition using significant unobservable inputs (Level 3) for the nine months ended September 30, 2024 and 2023. For instruments carried at fair value, the Bank reviews the fair value hierarchy classifications each quarter. Changes in the observability of the valuation attributes may result in a reclassification of certain financial assets or liabilities. Such reclassifications are reported as transfers in/out at fair value in the quarter in which the changes occur. There were no Level 3 transfers during the first nine months of 2024 or 2023. AFS Private Label MBS Three months ended September 30, Nine months ended September 30, (in thousands) 2024 2023 2024 2023 Balance, beginning of period $ 116,982 $ 134,685 $ 125,808 $ 142,271 Total gains (losses) (realized/unrealized) included in: (Provision) reversal for credit losses 889 (1,566) (1,061) (3,040) Accretion of credit losses in interest income 1,582 1,660 4,465 4,939 Net unrealized gains (losses) on AFS in OCI 3,780 (4,659) 1,505 (8,461) Settlements: Settlements (3,878) (3,263) (11,362) (8,852) Balance, end of period $ 119,355 $ 126,857 $ 119,355 $ 126,857 Total amount of gains for the periods presented included in earnings attributable to the change in unrealized gains (losses) relating to assets and liabilities still held at September 30 $ 2,471 $ 94 $ 3,404 $ 1,899 Change in unrealized gains (losses) for the period included in other comprehensive income (loss) for assets held at September 30 $ 3,780 $ (4,659) $ 1,505 $ (8,461)

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies The following table presents the Bank’s various off-balance sheet commitments which are described in detail below. The Bank deemed it unnecessary to record any liabilities for credit losses on these commitments at September 30, 2024 and December 31, 2023, based on the Bank’s credit extension and collateral policies. (in thousands) September 30, 2024 December 31, 2023 Notional amount Expiration Date Within One Year Expiration Date After One Year Total Total Standby letters of credit outstanding (1) (2) $ 30,897,854 $ — $ 30,897,854 $ 28,789,179 Commitments to purchase mortgage loans 21,095 — 21,095 30,028 Unsettled consolidated obligation discount notes, at par 845,790 — 845,790 — Unsettled consolidated obligation bonds, at par 461,000 — 461,000 78,000 Notes : (1) Excludes approved requests to issue future standby letters of credit of $94.1 million at September 30, 2024 and $32.0 million at December 31, 2023. (2) Letters of credit in the amount of $7.6 billion at September 30, 2024 and $7.0 billion at December 31, 2023, have renewal language that permits the letter of credit to be renewed for an additional period with a maximum renewal period of approximately five years. Commitments to Extend Credit on Standby Letters of Credit. Standby letters of credit are issued on behalf of members for a fee. A standby letter of credit is a financing arrangement between the Bank and its member. If the Bank is required to make payment for a beneficiary’s draw, these amounts are withdrawn from the member’s Demand Deposit Account (DDA). Any remaining amounts not covered by the withdrawal from the member’s DDA are converted into a collateralized overnight advance. Unearned fees related to standby letters of credit are recorded in other liabilities and had a balance of $6.5 million at September 30, 2024 and $5.0 million at December 31, 2023. The Bank manages the credit risk of each member on the basis of the member's TCE which includes its standby letters of credit. Standby letters of credit, similar to advances, are fully collateralized at the time of issuance and subject to member borrowing limits as established by the Bank. The Bank has established parameters for the review, assessment, monitoring and measurement of credit risk related to these standby letters of credit as described in Note 3 - Advances. The Bank does not have any legally binding or unconditional unused lines of credit for advances at September 30, 2024 or December 31, 2023. However, within the Bank’s Rollover (weekly/monthly) advance product, there were conditional lines of credit outstanding of $11.5 billion at September 30, 2024 and $10.0 billion at December 31, 2023. Commitments to Purchase Mortgage Loans. The Bank may enter into commitments that unconditionally obligate the Bank to purchase mortgage loans under the MPF Program. These delivery commitments are generally for periods not to exceed 60 days. Such commitments are recorded as derivatives. Pledged Collateral. The Bank may pledge cash and securities, as collateral, related to derivatives. Refer to Note 5 - Derivatives and Hedging Activities in this Form 10-Q for additional information about the Bank’s pledged collateral and other credit-risk-related contingent features. Legal Proceedings. The Bank is subject to legal proceedings arising in the normal course of business. The Bank 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. After consultation with legal counsel, management does not anticipate that the ultimate liability, if any, arising out of these matters will have a material effect on the Bank’s financial condition, results of operations or cash flows. Notes 3, 5, 6, 7, and 8 also discuss other commitments and contingencies.

Significant Accounting Policies

Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2024
Derivatives, Policy	The Bank is subject to credit risk due to the risk of nonperformance by counterparties to its derivative transactions. The Bank manages counterparty credit risk through credit analyses of derivative counterparties, collateral requirements, and adherence to the requirements set forth in its policies, U.S. Commodity Futures Trading Commission regulations, and Finance Agency regulations. Uncleared Derivatives. For uncleared derivatives, the degree of credit risk depends on the extent to which netting arrangements are included in such contracts to mitigate the risk. The Bank requires collateral agreements with collateral delivery thresholds on all uncleared derivatives. Uncleared derivative transactions executed on or after the September 1, 2022, are subject to two-way initial margin requirements as mandated by the Wall Street Reform and Consumer Protection Act. As of September 30, 2024, the Bank did not exceed initial margin thresholds and was not required to post two-way initial margin. If the Bank’s aggregate uncleared derivative transactions exposure to a counterparty exceeds the threshold, certain investment securities are required to be posted and held at a third-party custodian. The counterparty is entitled to a security interest in those securities which do not change ownership except upon the occurrence of certain events, including an event of default due to bankruptcy, insolvency, or similar proceeding. Generally, the Bank’s ISDA agreements for uncleared derivatives have collateral delivery thresholds set to zero (subject to minimum transfer amounts).
Fair Value Measurement, Policy	Fair Value Hierarchy. The fair value hierarchy is used to prioritize the inputs used to measure fair value by maximizing the use of observable inputs. The inputs are evaluated and an overall level for the fair value measurement is determined. This overall level is an indication of the market observability of the fair value measurement for the asset or liability. The fair value hierarchy prioritizes the inputs used to measure fair value into three broad levels: Level 1 Inputs - Quoted prices (unadjusted) for identical assets or liabilities in an active market that the reporting entity can access on the measurement date. An active market for the asset or liability is a market in which the transactions for the asset or liability occur with sufficient frequency and volume to provide pricing information on an ongoing basis. Level 2 Inputs - Inputs other than quoted prices within Level 1 that are observable inputs for the asset or liability, either directly or indirectly. If the asset or liability has a specified (contractual) term, a Level 2 input must be observable for substantially the full term of the asset or liability. Level 2 inputs include the following: (1) quoted prices for similar assets or liabilities in active markets; (2) quoted prices for identical or similar assets or liabilities in markets that are not active or in which little information is released publicly; (3) inputs other than quoted prices that are observable for the asset or liability (e.g., interest rates and yield curves that are observable at commonly quoted intervals, and implied volatilities) and (4) inputs that are derived principally from or corroborated by observable market data by correlation or other means. Level 3 Inputs - Valuations derived from techniques in which one or more significant inputs are not observable in the market. Valuation techniques include pricing models, discounted cash flow methodologies or similar techniques.
Fair Value of Financial Instruments, Policy	Investment Securities – non-MBS. The Bank uses either the income or market approach to determine the estimated fair value of non-MBS investment securities. For instruments that use the income approach, the significant inputs include a market-observable interest rate curve and a discount spread, if applicable. The market-observable interest rate curves and the related instrument types are as follows: ▪ CO curve: GSE and other U.S. obligations The Bank uses a market approach for its state and local agency bonds and U.S. Treasury obligations. For state and local agency bonds, the Bank obtains prices from multiple designated third-party vendors when available, and the default price is the average of the prices obtained. Otherwise, the approach is generally consistent with the approach outlined below for Investment Securities - MBS. For U.S. Treasury obligations, prices are obtained from a third-party vendor based on daily trade activity or dealer quotes. For certain short-term U.S. Treasury obligations, market prices are not available, and the Bank uses an income approach. Investment Securities – MBS. To value MBS holdings, the Bank obtains prices from multiple third-party pricing vendors, when available. The pricing vendors use various proprietary models to price MBS. The inputs to those models are derived from various sources including, but not limited to: benchmark yields, reported trades, dealer estimates, issuer spreads, benchmark securities, bids, offers and other market-related data. Since many MBS do not trade on a daily basis, the pricing vendors use available information such as benchmark curves, benchmarking of like securities, sector groupings and matrix pricing to determine the prices for individual securities, as applicable. Each pricing vendor has an established challenge process in place for all MBS valuations, which facilitates resolution of potentially erroneous prices identified by the Bank. The Bank’s valuation technique first requires the establishment of a median price for each security. All prices that are within a specified tolerance threshold of the median price are included in the cluster of prices that are averaged to compute a default price. Prices that are outside the threshold (outliers) are subject to further analysis (including, but not limited to, comparison to prices provided by an additional third-party valuation service, prices for similar securities, and/or non-binding dealer estimates) to determine if an outlier is a better estimate of fair value. If an outlier (or some other price identified in the analysis) is determined to be a better estimate of fair value, then the outlier (or the other price as appropriate) is used as the price rather than the default price. If, on the other hand, the analysis confirms that an outlier (or outliers) is (are) in fact not representative of fair value and the default price is the best estimate, then the default price is used as the final price. In all cases, the final price is used to determine the fair value of the security. If all prices received for a security are outside the tolerance threshold level of the median price, then there is no default price, and the final price is determined by an evaluation of all outlier prices as described above. Derivative Assets/Liabilities. The Bank bases the fair values of derivatives with similar terms on market prices, when available. However, market prices do not exist for many types of derivative instruments. Consequently, fair values for these instruments are estimated using standard valuation techniques such as discounted cash flow analysis and comparisons to similar instruments. Estimates developed using these methods are highly subjective and require judgment regarding significant matters such as the amount and timing of future cash flows, volatility of interest rates and the selection of discount rates that appropriately reflect market and credit risks. In addition, the fair value estimates for these instruments include accrued interest receivable/payable which approximate their carrying values due to their short-term nature. The discounted cash flow analysis used to determine the net present value of derivative instruments utilizes market-observable inputs (inputs that are actively quoted and can be validated to external sources). Inputs by class of derivative are as follows: Interest-rate related: ▪ Discount rate assumption. SOFR curve for SOFR indexed derivatives. Overnight Index Swap (OIS) curve for OIS indexed derivatives. ▪ Forward interest rate assumption (rates projected in order to calculate cash flows through the designated term of the hedge relationship). OIS curve or SOFR curve. ▪ Volatility assumption. Market-based expectations of future interest rate volatility implied from current market prices for similar options. Mortgage delivery commitments: ▪ TBA securities prices. Market-based prices of TBAs are determined by coupon class and expected term until settlement and a pricing adjustment reflective of the secondary mortgage market. The Bank is subject to credit risk on uncleared derivatives transactions due to the potential nonperformance by the derivatives counterparties. To mitigate this risk, the Bank has entered into netting arrangements and security agreements that provide for delivery of collateral at specified levels. As a result, uncleared derivatives are recognized as collateralized-to-market and the fair value of uncleared derivatives excludes netting adjustments and collateral. The Bank has evaluated the potential for fair value adjustment due to uncleared counterparty credit risk and has concluded that no adjustments are necessary. Credit risk related to uncleared derivatives may be further mitigated by the change of initial margin with the Bank’s derivative counterparties. However, as of September 30, 2024, the Bank did not exceed initial margin thresholds with any of its counterparties and was not required to post initial margin. If the Bank’s aggregate uncleared derivative transactions exposure to a counterparty exceeds the applicable threshold, certain investment securities are required to be posted and held at a third-party custodian. The Bank’s credit risk exposure on cleared derivatives is mitigated through the delivery of initial margin to offset future changes in value and daily delivery of variation margin to offset changes in market value. This is executed through the use of a central counterparty, either CME clearing or LCH Ltd. Variation margin payments are daily settlement payments rather than collateral. Initial margin continues to be treated as collateral and accounted for separately. The fair values of derivatives are netted by clearing agent and/or by counterparty pursuant to the provisions of each of the Bank’s netting agreements. If these netted amounts are positive, they are classified as an asset and, if negative, as a liability. Impaired Mortgage Loans Held for Portfolio and REO. The estimated fair values of impaired mortgage loans held for portfolio and real estate owned are determined based on values provided by a third-party’s retail-based AVM. The Bank adjusts the AVM value based on the amount it has historically received on liquidation. Subjectivity of Estimates. Estimates of the fair value of financial assets and liabilities using the methods described above are highly subjective and require judgments regarding significant matters such as the amount and timing of future cash flows, prepayment speed assumptions, expected interest rate volatility, possible distributions of future interest rates used to value options, and the selection of discount rates that appropriately reflect market and credit risks. The use of different assumptions could have a material effect on the fair value estimates. These estimates are susceptible to material near term changes because they are made as of a specific point in time.
Fair Value Transfer, Policy	For instruments carried at fair value, the Bank reviews the fair value hierarchy classifications each quarter. Changes in the observability of the valuation attributes may result in a reclassification of certain financial assets or liabilities. Such reclassifications are reported as transfers in/out at fair value in the quarter in which the changes occur.

Commitment and Contingencies (P

Commitment and Contingencies (Policies)	9 Months Ended
	Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Off-Balance-Sheet Credit Exposure, Policy	The Bank manages the credit risk of each member on the basis of the member's TCE which includes its standby letters of credit. Standby letters of credit, similar to advances, are fully collateralized at the time of issuance and subject to member borrowing limits as established by the Bank. The Bank has established parameters for the review, assessment, monitoring and measurement of credit risk related to these standby letters of credit as described in Note 3 - Advances.

Investments (Tables)

Investments (Tables)	9 Months Ended
	Sep. 30, 2024
Investments, Debt and Equity Securities [Abstract]
Schedule of Trading Securities	The following table presents the fair value of trading securities by major security type at September 30, 2024 and December 31, 2023. (in thousands) September 30, 2024 December 31, 2023 GSE obligations $ 156,729 $ 217,722
Net Gains (Losses) on Trading Securities	The following table presents net gains (losses) on trading securities for the first nine months of 2024 and 2023. Three months ended September 30, Nine months ended September 30, (in thousands) 2024 2023 2024 2023 Net unrealized gains (losses) on trading securities held at period-end $ 4,165 $ (2,437) $ 2,787 $ (1,566) Net gains (losses) on trading securities sold/matured during the period 138 — 492 — Net gains (losses) on trading securities $ 4,303 $ (2,437) $ 3,279 $ (1,566)
Schedule of Available-for-sale Securities Reconciliation [Table Text Block]	The following tables presents AFS securities by major security type at September 30, 2024 and December 31, 2023. September 30, 2024 (in thousands) Amortized Cost (1) Allowance for Credit Losses Gross Unrealized Gains Gross Unrealized Losses Fair Value Non-MBS: U.S. Treasury obligations $ 4,172,740 $ — $ 3,945 $ (4,451) $ 4,172,234 GSE and TVA obligations 920,864 — 19,373 (1,248) 938,989 State or local agency obligations 182,700 — 10 (8,409) 174,301 Total non-MBS $ 5,276,304 $ — $ 23,328 $ (14,108) $ 5,285,524 MBS: U.S. obligations single-family $ 1,897,775 $ — $ 5,681 $ (9,039) $ 1,894,417 GSE single-family 4,112,428 — 9,903 (32,094) 4,090,237 GSE multifamily 6,508,243 — 20,023 (12,918) 6,515,348 Private label 126,735 (13,049) 6,704 (1,035) 119,355 Total MBS $ 12,645,181 $ (13,049) $ 42,311 $ (55,086) $ 12,619,357 Total AFS securities $ 17,921,485 $ (13,049) $ 65,639 $ (69,194) $ 17,904,881 December 31, 2023 (in thousands) Amortized Cost (1) Allowance for Credit Losses Gross Unrealized Gains Gross Unrealized Losses Fair Value Non-MBS: U.S. Treasury obligations $ 3,683,045 $ — $ 1,345 $ (8,353) $ 3,676,037 GSE and TVA obligations 967,074 — 18,218 (1,985) 983,307 State or local agency obligations 183,430 — 19 (9,338) 174,111 Total non-MBS $ 4,833,549 $ — $ 19,582 $ (19,676) $ 4,833,455 MBS: U.S. obligations single-family $ 1,551,915 $ — $ 3,161 $ (16,687) $ 1,538,389 GSE single-family 2,095,261 — 5,174 (52,683) 2,047,752 GSE multifamily 6,293,426 — 8,922 (24,819) 6,277,529 Private label 133,632 (11,988) 7,609 (3,445) 125,808 Total MBS $ 10,074,234 $ (11,988) $ 24,866 $ (97,634) $ 9,989,478 Total AFS securities $ 14,907,783 $ (11,988) $ 44,448 $ (117,310) $ 14,822,933 Note : (1) Includes adjustments made to the cost basis of an investment for accretion, amortization and/or fair value hedge accounting adjustments, and excludes accrued interest receivable
Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table Text Block]	The following tables summarize the AFS securities with gross unrealized losses as of September 30, 2024 and December 31, 2023. The gross unrealized losses are aggregated by major security type and length of time that individual securities have been in a continuous unrealized loss position. September 30, 2024 Less than 12 Months Greater than 12 Months Total (in thousands) Fair Value Gross Fair Value Gross Fair Value Gross Non-MBS: U.S. Treasury obligations $ 2,086,310 $ (2,371) $ 71,723 $ (2,080) $ 2,158,033 $ (4,451) GSE and TVA obligations — — 26,482 (1,248) 26,482 (1,248) State or local agency obligations 6,586 (29) 150,380 (8,380) 156,966 (8,409) Total non-MBS $ 2,092,896 $ (2,400) $ 248,585 $ (11,708) $ 2,341,481 $ (14,108) MBS: U.S. obligations single-family $ 94,988 $ (87) $ 832,522 $ (8,952) $ 927,510 $ (9,039) GSE single-family 296,832 (155) 1,386,940 (31,939) 1,683,772 (32,094) GSE multifamily 860,479 (1,906) 2,392,646 (11,012) 3,253,125 (12,918) Private label — — 34,540 (1,035) 34,540 (1,035) Total MBS $ 1,252,299 $ (2,148) $ 4,646,648 $ (52,938) $ 5,898,947 $ (55,086) Total $ 3,345,195 $ (4,548) $ 4,895,233 $ (64,646) $ 8,240,428 $ (69,194) December 31, 2023 Less than 12 Months Greater than 12 Months Total (in thousands) Fair Value Gross Unrealized Losses Fair Value Gross Fair Value Gross Non-MBS: U.S. Treasury obligations $ 2,655,906 $ (4,566) $ 94,409 $ (3,787) $ 2,750,315 $ (8,353) GSE and TVA obligations — — 32,837 (1,985) 32,837 (1,985) State or local agency obligations 2,229 (11) 149,653 (9,327) 151,882 (9,338) Total non-MBS $ 2,658,135 $ (4,577) $ 276,899 $ (15,099) $ 2,935,034 $ (19,676) MBS: U.S. obligations single-family $ 722,587 $ (5,968) $ 291,262 $ (10,719) $ 1,013,849 $ (16,687) GSE single-family 205,891 (2,279) 1,329,086 (50,404) 1,534,977 (52,683) GSE multifamily 2,650,655 (16,858) 2,000,100 (7,961) 4,650,755 (24,819) Private label 18,497 (686) 27,259 (2,759) 45,756 (3,445) Total MBS $ 3,597,630 $ (25,791) $ 3,647,707 $ (71,843) $ 7,245,337 $ (97,634) Total $ 6,255,765 $ (30,368) $ 3,924,606 $ (86,942) $ 10,180,371 $ (117,310)
Proceeds from Sales and Gross Gains and Losses on AFS Securities	The following table provides a summary of proceeds, gross gains and losses on sales of AFS securities for the three and nine months ended September 30, 2024 and September 30, 2023 Three months ended September 30, Nine months ended September 30, (in thousands) 2024 2023 2024 2023 Proceeds from sale of AFS securities $ — $ — $ — $ 798,200 Gross gains on AFS securities $ — $ — $ — $ 489 Net realized gains(losses) from sale of AFS securities $ — $ — $ — $ 489
Investments Classified by Contractual Maturity Date [Table Text Block]	The amortized cost and fair value of AFS securities by contractual maturity as of September 30, 2024 and December 31, 2023 are presented below. Expected maturities of some securities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment fees. MBS are not presented by contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment fees. (in thousands) September 30, 2024 December 31, 2023 Year of Maturity Amortized Cost Fair Value Amortized Cost Fair Value Non-MBS: Due in one year or less $ 271,744 $ 272,320 $ 100,351 $ 100,521 Due after one year through five years 4,092,249 4,101,984 4,022,388 4,024,322 Due after five years through ten years 790,816 796,207 588,935 594,033 Due after ten years 121,495 115,013 121,875 114,579 Total non-MBS 5,276,304 5,285,524 4,833,549 4,833,455 MBS 12,645,181 12,619,357 10,074,234 9,989,478 Total AFS securities $ 17,921,485 $ 17,904,881 $ 14,907,783 $ 14,822,933
Debt Securities, Held-to-maturity [Table Text Block]	The following tables presents HTM securities by major security type at September 30, 2024 and December 31, 2023. September 30, 2024 (in thousands) Amortized Cost (1) Gross Unrealized Holding Gains Gross Unrealized Holding Losses Fair Value MBS: U.S. obligations single-family $ 700,682 $ 4,290 $ (3,142) $ 701,830 GSE single-family 400,836 909 (49,589) 352,156 GSE multifamily 244,348 — (2,212) 242,136 Private label 38,721 1 (1,650) 37,072 Total MBS $ 1,384,587 $ 5,200 $ (56,593) $ 1,333,194 Total HTM securities $ 1,384,587 $ 5,200 $ (56,593) $ 1,333,194 December 31, 2023 (in thousands) Amortized Cost (1) Gross Unrealized Holding Gains Gross Unrealized Holding Losses Fair Value MBS: U.S. obligations single-family $ 608,937 $ 4,962 $ (5,362) $ 608,537 GSE single-family 440,752 1,393 (58,407) 383,738 GSE multifamily 245,545 — (6,730) 238,815 Private label 44,525 — (2,869) 41,656 Total MBS $ 1,339,759 $ 6,355 $ (73,368) $ 1,272,746 Total HTM securities $ 1,339,759 $ 6,355 $ (73,368) $ 1,272,746 Note : (1) Includes adjustments made to the cost basis of an investment for accretion and amortization and excludes accrued interest receivable
Schedule of Interest Rate Payment Terms For Investments [Table Text Block]	The following table details interest payment terms at September 30, 2024 and December 31, 2023. (in thousands) September 30, 2024 December 31, 2023 Amortized cost of AFS non-MBS: Fixed-rate $ 5,276,304 $ 4,833,549 Total non-MBS $ 5,276,304 $ 4,833,549 Amortized cost of AFS MBS: Fixed-rate $ 4,341,525 $ 3,804,161 Variable-rate 8,303,656 6,270,073 Total MBS $ 12,645,181 $ 10,074,234 Total amortized cost of AFS securities $ 17,921,485 $ 14,907,783 Realized Gains (Losses) on AFS Securities. The following table provides a summary of proceeds, gross gains and losses on sales of AFS securities for the three and nine months ended September 30, 2024 and September 30, 2023 Three months ended September 30, Nine months ended September 30, (in thousands) 2024 2023 2024 2023 Proceeds from sale of AFS securities $ — $ — $ — $ 798,200 Gross gains on AFS securities $ — $ — $ — $ 489 Net realized gains(losses) from sale of AFS securities $ — $ — $ — $ 489 (in thousands) September 30, 2024 December 31, 2023 Amortized cost of HTM MBS: Fixed-rate $ 1,289,721 $ 1,230,759 Variable-rate 94,866 109,000 Total MBS $ 1,384,587 $ 1,339,759 Total HTM securities $ 1,384,587 $ 1,339,759
Debt Securities, Available-for-sale, Allowance for Credit Loss [Table Text Block]	The following table presents a rollforward of the ACL on AFS securities for the three and nine months ended September 30, 2024 and 2023. Private label MBS Three months ended September 30, Nine months ended September 30, (in thousands) 2024 2023 2024 2023 Balance, beginning of period $ 13,938 $ 10,006 $ 11,988 $ 8,532 Increases (decreases) for securities with a previous ACL or OTTI recorded (889) 1,566 1,061 3,040 Balance, end of period $ 13,049 $ 11,572 $ 13,049 $ 11,572

Advances (Tables)

Advances (Tables)	9 Months Ended
	Sep. 30, 2024
Advances [Abstract]
Schedule of Advances Classified by Contractual Maturity Date	The following table details the Bank’s advances portfolio by year of redemption and weighted-average interest rate as of September 30, 2024 and December 31, 2023. (dollars in thousands) September 30, 2024 December 31, 2023 Year of Redemption Amount Weighted Average Interest Rate Amount Weighted Average Interest Rate Due in 1 year or less $ 59,628,917 5.02 % $ 46,380,744 5.35 % Due after 1 year through 2 years 11,971,793 4.91 19,483,400 5.17 Due after 2 years through 3 years 5,077,355 4.29 9,308,565 5.24 Due after 3 years through 4 years 2,080,512 4.30 1,909,905 3.97 Due after 4 years through 5 years 379,048 4.65 1,395,177 4.29 Thereafter 159,296 3.38 169,407 3.33 Total par value 79,296,921 4.93 % 78,647,198 5.24 % Deferred prepayment fees (253) (537) Fair value hedging adjustments (31,293) (215,153) Total book value (1) $ 79,265,375 $ 78,431,508 The following table summarizes advances by the earlier of year of redemption or next call date as of September 30, 2024 and December 31, 2023. Year of Redemption or Next Call Date (in thousands) September 30, 2024 December 31, 2023 Due in 1 year or less $ 59,823,917 $ 46,420,744 Due after 1 year through 2 years 11,966,793 19,458,400 Due after 2 years through 3 years 5,054,855 9,293,565 Due after 3 years through 4 years 2,028,012 1,909,905 Due after 4 years through 5 years 264,048 1,395,177 Thereafter 159,296 169,407 Total par value $ 79,296,921 $ 78,647,198 The following table details interest rate payment terms by year of redemption for advances as of September 30, 2024 and December 31, 2023. (in thousands) September 30, 2024 December 31, 2023 Fixed-rate – overnight $ 2,248,697 $ 1,739,567 Fixed-rate – term: Due in 1 year or less 11,598,494 15,218,445 Thereafter 10,163,004 13,216,455 Total fixed-rate 24,010,195 30,174,467 Variable-rate: Due in 1 year or less 45,781,726 29,422,731 Thereafter 9,505,000 19,050,000 Total variable-rate 55,286,726 48,472,731 Total par value $ 79,296,921 $ 78,647,198

Mortgage Loans Held for Portf_2

Mortgage Loans Held for Portfolio (Tables)	9 Months Ended
	Sep. 30, 2024
Receivables [Abstract]
Schedule of Mortgage Loans Held for Portfolio	The following table presents balances as of September 30, 2024 and December 31, 2023 for mortgage loans held for portfolio. (in thousands) September 30, 2024 December 31, 2023 Fixed-rate long-term single-family mortgages (1) $ 4,595,698 $ 4,527,088 Fixed-rate medium-term single-family mortgages (2) 100,505 116,527 Total par value 4,696,203 4,643,615 Premiums 66,838 68,667 Discounts (11,699) (11,968) Hedging adjustments (2,206) 456 Total mortgage loans held for portfolio (3) $ 4,749,136 $ 4,700,770 Allowance for credit losses on mortgage loans (2,394) (3,018) Mortgage loans held for portfolio, net $ 4,746,742 $ 4,697,752 Notes: (1) Long-term is defined as an original term of greater than 15 years and up to 30 years. (2) Medium-term is defined as an original term of 15 years or less. (3) Amounts exclude accrued interest receivable The following table details the par value of mortgage loans held for portfolio outstanding categorized by type as of September 30, 2024 and December 31, 2023. (in thousands) September 30, 2024 December 31, 2023 Conventional loans $ 4,600,966 $ 4,539,983 Government-guaranteed/insured loans 95,237 103,632 Total par value $ 4,696,203 $ 4,643,615
Financing Receivable Credit Quality Indicators [Table Text Block]	Credit Quality Indicator for Conventional Mortgage Loans. The following table presents the payment status for conventional mortgage loans at September 30, 2024 and December 31, 2023. September 30, 2024 (in thousands) Origination Year Payment Status, at amortized cost (1) Prior to 2020 2020 to 2024 Total Past due 30-59 days $ 22,807 $ 16,600 $ 39,407 Past due 60-89 days 8,026 6,984 15,010 Past due 90 days or more 11,780 7,999 19,779 Total past due loans $ 42,613 $ 31,583 $ 74,196 Current loans 1,479,718 3,098,003 4,577,721 Total conventional loans $ 1,522,331 $ 3,129,586 $ 4,651,917 December 31, 2023 Origination Year Payment Status, at amortized cost (1) Prior to 2019 2019 to 2023 Total Past due 30-59 days $ 18,132 $ 20,959 $ 39,091 Past due 60-89 days 6,372 9,740 16,112 Past due 90 days or more 8,932 9,171 18,103 Total past due loans $ 33,436 $ 39,870 $ 73,306 Current loans 1,148,754 3,372,849 4,521,603 Total conventional loans $ 1,182,190 $ 3,412,719 $ 4,594,909 Note: (1) The amortized cost at September 30, 2024 and December 31, 2023 excludes accrued interest receivable. Other Delinquency Statistics. The following table presents the delinquency statistics for the Bank’s mortgage loans at September 30, 2024 and December 31, 2023. September 30, 2024 (dollars in thousands) (1) Conventional MPF Loans Government-Guaranteed or Insured Loans Total In process of foreclosures, included above (2) $ 5,013 $ 516 $ 5,529 Serious delinquency rate (3) 0.4 % 2.4 % 0.5 % Past due 90 days or more still accruing interest $ — $ 2,350 $ 2,350 Loans on nonaccrual status $ 24,210 $ — $ 24,210 December 31, 2023 (dollars in thousands) (1) Conventional MPF Loans Government-Guaranteed or Insured Loans Total In process of foreclosures, included above (2) $ 5,932 $ 960 $ 6,892 Serious delinquency rate (3) 0.4 % 2.0 % 0.4 % Past due 90 days or more still accruing interest $ — $ 2,137 $ 2,137 Loans on nonaccrual status $ 23,002 $ — $ 23,002 Notes: (1) Amounts presented at amortized cost. (2) Includes loans where the decision of foreclosure or similar alternative such as pursuit of deed-in-lieu has been reported. Loans in process of foreclosure are included in past due or current loans dependent on their delinquency status. (3) Loans that are 90 days or more past due or in the process of foreclosure expressed as a percentage of the total loan portfolio class.
Financing Receivable, Past Due [Table Text Block]	The following table presents the delinquency statistics for the Bank’s mortgage loans at September 30, 2024 and December 31, 2023. September 30, 2024 (dollars in thousands) (1) Conventional MPF Loans Government-Guaranteed or Insured Loans Total In process of foreclosures, included above (2) $ 5,013 $ 516 $ 5,529 Serious delinquency rate (3) 0.4 % 2.4 % 0.5 % Past due 90 days or more still accruing interest $ — $ 2,350 $ 2,350 Loans on nonaccrual status $ 24,210 $ — $ 24,210 December 31, 2023 (dollars in thousands) (1) Conventional MPF Loans Government-Guaranteed or Insured Loans Total In process of foreclosures, included above (2) $ 5,932 $ 960 $ 6,892 Serious delinquency rate (3) 0.4 % 2.0 % 0.4 % Past due 90 days or more still accruing interest $ — $ 2,137 $ 2,137 Loans on nonaccrual status $ 23,002 $ — $ 23,002 Notes: (1) Amounts presented at amortized cost. (2) Includes loans where the decision of foreclosure or similar alternative such as pursuit of deed-in-lieu has been reported. Loans in process of foreclosure are included in past due or current loans dependent on their delinquency status. (3) Loans that are 90 days or more past due or in the process of foreclosure expressed as a percentage of the total loan portfolio class.
Financing Receivable, Allowance for Credit Loss [Table Text Block]	Conventional MPF - Rollforward of ACL Three months ended September 30, Nine months ended September 30, (in thousands) 2024 2023 2024 2023 Balance, beginning of period $ 2,694 $ 3,256 $ 3,018 $ 3,240 (Charge-offs) Recoveries, net (1) (342) (21) (698) 9 Provision (reversal) for credit losses 42 (264) 74 (278) Balance, end of period $ 2,394 $ 2,971 $ 2,394 $ 2,971 Note: (1) Net charge-offs that the Bank does not expect to recover through CE receivable.

Derivatives and Hedging Activit

Derivatives and Hedging Activities (Tables)	9 Months Ended
	Sep. 30, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	The following tables summarize the notional amount and fair value of derivative instruments and total derivatives assets and liabilities. Total derivative assets and liabilities include the effect of netting adjustments and cash collateral. For purposes of this disclosure, the derivative values include the fair value of derivatives and the related accrued interest. September 30, 2024 (in thousands) Notional Amount of Derivatives Derivative Assets Derivative Liabilities Derivatives designated as hedging instruments: Interest rate swaps $ 50,879,656 $ 92,971 $ 346,532 Derivatives not designated as hedging instruments: Interest rate swaps $ 2,796,145 $ 9,312 $ 11,701 Interest rate caps or floors 2,025,000 2,628 — Mortgage delivery commitments 21,095 — 392 Total derivatives not designated as hedging instruments: $ 4,842,240 $ 11,940 $ 12,093 Total derivatives before netting and collateral adjustments $ 55,721,896 $ 104,911 $ 358,625 Netting adjustments and cash collateral (1) 304,967 (346,538) Derivative assets and derivative liabilities as reported on the Statements of Condition $ 409,878 $ 12,087 December 31, 2023 (in thousands) Notional Amount of Derivatives Derivative Assets Derivative Liabilities Derivatives designated as hedging instruments: Interest rate swaps $ 81,226,968 $ 199,554 $ 632,508 Derivatives not designated as hedging instruments: Interest rate swaps $ 2,615,212 $ 2,037 $ 18,139 Interest rate caps or floors 1,525,000 4,869 — Mortgage delivery commitments 30,028 155 26 Total derivatives not designated as hedging instruments: $ 4,170,240 $ 7,061 $ 18,165 Total derivatives before netting and collateral adjustments $ 85,397,208 $ 206,615 $ 650,673 Netting adjustments and cash collateral (1) 201,892 (643,339) Derivative assets and derivative liabilities as reported on the Statements of $ 408,507 $ 7,334 Note: (1) Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions, cash collateral including accrued interest held or placed with the same clearing agent and/or counterparties. Cash collateral posted including accrued interest was $661.7 million for September 30, 2024 and $854.6 million for December 31, 2023. Cash collateral received was $10.2 million for September 30, 2024 and $9.4 million for December 31, 2023.
Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table]	The following table presents, by type of hedged item, the gains (losses) on derivatives and the related hedged items in fair value hedging relationships, which also includes amortization of basis adjustments related to hedged items in discontinued fair value hedge relationships, and the impact of those derivatives on the Bank’s net interest income. Also included is the amortization of basis adjustments related to mortgage delivery commitments, which are characterized as derivatives, but are not designated in fair value hedge relationships. (in thousands) Gains/(Losses) on Derivative Gains/ (Losses) on Hedged Item Net Interest Settlements Effect of Derivatives on Net Interest Income Total Interest Income/ (Expense) Recorded in the Statements of Income Three months ended September 30, 2024 Hedged item type: Advances $ (245,715) $ 245,823 $ 74,955 $ 75,063 $ 1,058,730 AFS securities (292,757) 289,817 56,888 53,948 262,123 Mortgage loans held for portfolio — (91) — (91) 42,555 Consolidated obligations – discount notes 1,841 (1,638) (995) (792) (143,277) Consolidated obligations – bonds 298,007 (298,041) (124,212) (124,246) (1,238,603) Total $ (238,624) $ 235,870 $ 6,636 $ 3,882 Nine months ended September 30, 2024 Hedged item type: Advances $ (183,617) $ 183,856 $ 241,114 $ 241,353 $ 3,147,401 AFS securities (164,311) 161,450 163,526 160,665 735,937 Mortgage loans held for portfolio — (256) — (256) 124,967 Consolidated obligations – discount notes 823 (1,079) (3,723) (3,979) (466,347) Consolidated obligations – bonds 344,215 (343,370) (414,514) (413,669) (3,558,550) Total $ (2,890) $ 601 $ (13,597) $ (15,886) (in thousands) Gains/(Losses) on Derivative Gains/ (Losses) on Hedged Item Net Interest Settlements Effect of Derivatives on Net Interest Income Total Interest Income/ (Expense) Recorded in the Statements of Income Three months ended September 30, 2023 Hedged item type: Advances $ 36,853 $ (36,808) $ 91,203 $ 91,248 $ 1,071,029 AFS securities 138,160 (138,366) 47,439 47,233 190,518 Mortgage loans held for portfolio — (119) — (119) 37,516 Consolidated obligations - discount notes 4,507 (2,215) (4,712) (2,420) (220,233) Consolidated obligations – bonds 53,846 (54,243) (179,861) (180,258) (1,079,869) Total $ 233,366 $ (231,751) $ (45,931) $ (44,316) Nine months ended September 30, 2023 Hedged item type: Advances $ 119,382 $ (119,191) $ 225,959 $ 226,150 $ 3,120,857 AFS securities 100,815 (100,467) 138,872 139,220 516,045 Mortgage loans held for portfolio — (423) — (423) 108,824 Consolidated obligations - discount notes 3,573 (5,584) (6,778) (8,789) (943,590) Consolidated obligations – bonds 66,758 (67,189) (450,544) (450,975) (2,778,910) $ 290,528 $ (292,854) $ (92,491) $ (94,817)
Schedule Of Derivative Instruments By Type Gain Loss In Statement Of Financial Performance	The following table presents the cumulative amount of fair value hedging adjustments and the related carrying amount of the hedged items. (in thousands) September 30, 2024 Hedged item type Carrying Amount of Hedged Assets/Liabilities (1) Cumulative Amount of Fair Value Hedging Adjustments Included in the Carrying Amount of the Hedged Assets/Liabilities Fair Value Hedging Adjustments for Discontinued Hedging Relationships Total Amount of Fair Value Hedging Adjustments Advances $ 15,192,060 $ (30,916) $ (378) $ (31,294) AFS securities 8,626,329 (162,654) 624 (162,030) Consolidated obligations – discount notes 1,247,389 706 — 706 Consolidated obligations – bonds 25,321,040 (275,549) — (275,549) (in thousands) December 31, 2023 Hedged item type Carrying Amount of Hedged Assets/Liabilities (1) Cumulative Amount of Fair Value Hedging Adjustments Included in the Carrying Amount of the Hedged Assets/Liabilities Fair Value Hedging Adjustments for Discontinued Hedging Relationships Total Amount of Fair Value Hedging Adjustments Advances $ 17,280,826 $ (214,538) $ (615) $ (215,153) AFS securities 7,258,326 (324,211) 730 (323,481) Consolidated obligations – discounted notes 3,749,121 (373) — (373) Consolidated obligations – bonds 51,362,338 (618,920) — (618,920) Note: (1)
Derivatives Not Designated as Hedging Instruments	The following table presents net gains (losses) related to derivatives not designated as hedging instruments in noninterest income. Three months ended September 30, Nine months ended September 30, (in thousands) 2024 2023 2024 2023 Derivatives not designated as hedging instruments: Economic hedges: Interest rate swaps $ (18,319) $ 5,913 $ (13,140) $ 19,717 Interest rate caps or floors (1,829) (1,273) (2,910) (2,230) Net interest settlements 3,888 3,941 9,494 5,850 Mortgage delivery commitments (1,591) (731) (2,797) (856) Other — — 1 1 Total net gains (losses) related to derivatives not designated as hedging instruments $ (17,851) $ 7,850 $ (9,352) $ 22,482 Other - price alignment amount on cleared derivatives (1) (114) (580) (1,266) (1,266) Net gains (losses) on derivatives $ (17,965) $ 7,270 $ (10,618) $ 21,216 Note: (1) This amount is for derivatives for which variation margin is characterized as a daily settled contract.
Offsetting Assets	The following tables present separately the fair value of derivative instruments meeting or not meeting netting requirements. Gross recognized amounts do not include the related collateral received from or pledged to counterparties. Net amounts reflect the adjustments of collateral received from or pledged to counterparties. September 30, 2024 Derivative Instruments Meeting Netting Requirements (in thousands) Gross Recognized Amount Gross Amounts of Netting Adjustments and Cash Collateral Net amounts after netting adjustments and cash collateral Derivative Instruments Not Meeting Netting Requirements (1) Total Derivative Assets and Total Derivative Liabilities Derivative assets Uncleared $ 64,095 $ (63,739) $ 356 $ — $ 356 Cleared 40,816 368,706 409,522 — 409,522 Total derivative assets $ 104,911 $ 304,967 $ 409,878 $ — $ 409,878 Derivative liabilities Uncleared $ 354,945 $ (343,250) $ 11,695 $ 392 $ 12,087 Cleared 3,288 (3,288) — — — Total derivative liabilities $ 358,233 $ (346,538) $ 11,695 $ 392 $ 12,087 December 31, 2023 Derivative Instruments Meeting Netting Requirements (in thousands) Gross Recognized Amount Gross Amounts of Netting Adjustments and Cash Collateral Net amounts after netting adjustments and cash collateral Derivative Instruments Not Meeting Netting Requirements (1) Total Derivative Assets and Total Derivative Liabilities Derivative assets Uncleared $ 201,762 $ (201,356) $ 406 $ 155 $ 561 Cleared 4,698 403,248 407,946 — 407,946 Total derivative assets $ 206,460 $ 201,892 $ 408,352 $ 155 $ 408,507 Derivative liabilities Uncleared $ 644,826 $ (637,518) $ 7,308 $ 26 $ 7,334 Cleared 5,821 (5,821) — — — Total derivative liabilities $ 650,647 $ (643,339) $ 7,308 $ 26 7,334 Note: (1) Represents derivatives that are not subject to an enforceable netting agreement (e.g., mortgage delivery commitments).
Offsetting Liabilities	The following tables present separately the fair value of derivative instruments meeting or not meeting netting requirements. Gross recognized amounts do not include the related collateral received from or pledged to counterparties. Net amounts reflect the adjustments of collateral received from or pledged to counterparties. September 30, 2024 Derivative Instruments Meeting Netting Requirements (in thousands) Gross Recognized Amount Gross Amounts of Netting Adjustments and Cash Collateral Net amounts after netting adjustments and cash collateral Derivative Instruments Not Meeting Netting Requirements (1) Total Derivative Assets and Total Derivative Liabilities Derivative assets Uncleared $ 64,095 $ (63,739) $ 356 $ — $ 356 Cleared 40,816 368,706 409,522 — 409,522 Total derivative assets $ 104,911 $ 304,967 $ 409,878 $ — $ 409,878 Derivative liabilities Uncleared $ 354,945 $ (343,250) $ 11,695 $ 392 $ 12,087 Cleared 3,288 (3,288) — — — Total derivative liabilities $ 358,233 $ (346,538) $ 11,695 $ 392 $ 12,087 December 31, 2023 Derivative Instruments Meeting Netting Requirements (in thousands) Gross Recognized Amount Gross Amounts of Netting Adjustments and Cash Collateral Net amounts after netting adjustments and cash collateral Derivative Instruments Not Meeting Netting Requirements (1) Total Derivative Assets and Total Derivative Liabilities Derivative assets Uncleared $ 201,762 $ (201,356) $ 406 $ 155 $ 561 Cleared 4,698 403,248 407,946 — 407,946 Total derivative assets $ 206,460 $ 201,892 $ 408,352 $ 155 $ 408,507 Derivative liabilities Uncleared $ 644,826 $ (637,518) $ 7,308 $ 26 $ 7,334 Cleared 5,821 (5,821) — — — Total derivative liabilities $ 650,647 $ (643,339) $ 7,308 $ 26 7,334 Note: (1) Represents derivatives that are not subject to an enforceable netting agreement (e.g., mortgage delivery commitments).

Consolidated Obligations (Table

Consolidated Obligations (Tables)	9 Months Ended
	Sep. 30, 2024
Schedule of Short-term and Long-term Debt [Line Items]
Schedule of Maturities of Debt	The following table presents a summary of the Bank’s consolidated obligation bonds outstanding by year of contractual maturity and weighted-average interest rate at September 30, 2024 and December 31, 2023. September 30, 2024 December 31, 2023 (dollars in thousands) Amount Weighted Average Interest Rate Amount Weighted Average Interest Rate Due in 1 year or less $ 79,045,455 4.72 % $ 62,578,585 4.89 % Due after 1 year through 2 years 8,013,900 2.67 13,255,965 4.63 Due after 2 years through 3 years 4,409,200 2.56 8,010,800 1.94 Due after 3 years through 4 years 2,418,250 3.64 2,178,600 3.30 Due after 4 years through 5 years 1,768,410 4.25 2,262,125 3.59 Thereafter 3,142,000 3.05 3,119,635 2.87 Total par value $ 98,797,215 4.37 % $ 91,405,710 4.46 % Bond premiums $ 23,196 $ 34,145 Bond discounts (9,534) (13,419) Concession fees (6,511) (6,484) Fair value hedging adjustments (275,549) (618,920) Total book value $ 98,528,817 $ 90,801,032 The following table presents consolidated obligation bonds outstanding by the earlier of contractual maturity or next call date as of September 30, 2024 and December 31, 2023. (in thousands) September 30, 2024 December 31, 2023 Due in 1 year or less $ 90,664,955 $ 75,974,085 Due after 1 year through 2 years 4,179,400 10,202,465 Due after 2 years through 3 years 1,090,200 2,122,800 Due after 3 years through 4 years 1,557,250 650,600 Due after 4 years through 5 years 534,410 1,552,125 Thereafter 771,000 903,635 Total par value $ 98,797,215 $ 91,405,710
Schedule of Long-term Debt by Call Feature	The following table details interest rate payment terms for the Bank’s consolidated obligation bonds as of September 30, 2024 and December 31, 2023. (in thousands) September 30, 2024 December 31, 2023 Par value of consolidated bonds: Fixed-rate $ 33,728,315 $ 60,032,810 Step-up 1,590,000 2,034,000 Floating-rate 63,478,900 29,338,900 Total par value $ 98,797,215 $ 91,405,710 The following table presents the Bank’s consolidated obligation bonds outstanding between noncallable and callable as of September 30, 2024 and December 31, 2023. (in thousands) September 30, 2024 December 31, 2023 Noncallable $ 71,758,715 $ 51,242,210 Callable 27,038,500 40,163,500 Total par value $ 98,797,215 $ 91,405,710
Schedule of Short-term Debt	The following table details the Bank’s consolidated obligation discount notes as of September 30, 2024 and December 31, 2023. (dollars in thousands) September 30, 2024 December 31, 2023 Book value $ 9,776,014 $ 13,683,580 Par value $ 9,810,114 $ 13,806,118 Weighted average interest rate (1) 5.00 % 5.36 % Note: (1) Represents yield to maturity excluding concession fees and hedging adjustments.

Capital (Tables)

Capital (Tables)	9 Months Ended
	Sep. 30, 2024
Banking Regulation, Total Capital [Abstract]
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations	The following table demonstrates the Bank’s compliance with the regulatory capital requirements at September 30, 2024 and December 31, 2023. September 30, 2024 December 31, 2023 (dollars in thousands) Required Actual Required Actual Regulatory capital requirements: RBC $ 901,689 $ 5,994,096 $ 748,268 $ 5,780,099 Total capital-to-asset ratio 4.0 % 5.2 % 4.0 % 5.2 % Total regulatory capital $ 4,638,575 $ 5,994,096 $ 4,485,906 $ 5,780,099 Leverage ratio 5.0 % 7.8 % 5.0 % 7.7 % Leverage capital $ 5,798,218 $ 8,991,144 $ 5,607,382 $ 8,670,149
Schedule of Dividends Paid [Table Text Block]	Dividends paid through the third quarter of 2024 and 2023 are presented in the table below. Dividend - Annual Yield 2024 2023 Membership Activity Membership Activity February 5.35 % 8.50 % 4.00 % 7.95 % April 5.60 % 8.75 % 5.00 % 7.95 % July 5.60 % 9.00 % 5.25 % 7.95 %
Schedule of Mandatorily Redeemable Capital Stock by Maturity Date	The following table provides the related dollar amounts for activities recorded in mandatorily redeemable capital stock during the nine months ended September 30, 2024 and 2023. Nine months ended September 30, (in thousands) 2024 2023 Balance, beginning of the period $ 27,874 $ 27,763 Capital stock subject to mandatory redemption reclassified from capital 5,820 13,681 Redemption/repurchase of mandatorily redeemable capital stock (6,140) (13,448) Balance, end of the period $ 27,554 $ 27,996 The following table shows the amount of mandatorily redeemable capital stock by contractual year of redemption at September 30, 2024 and December 31, 2023. (in thousands) September 30, 2024 December 31, 2023 Due in 1 year or less $ 43 $ — Due after 1 year through 2 years 450 40 Due after 2 years through 3 years 4,262 486 Due after 3 years through 4 years 1,108 4,728 Due after 4 years through 5 years 400 1,181 Past contractual redemption date due to activity outstanding 21,291 21,439 Total $ 27,554 $ 27,874
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table summarizes the changes in AOCI for the three and nine months ended September 30, 2024 and 2023. (in thousands) Net Unrealized Gains(Losses) on AFS Pension and Post-Retirement Plans Total June 30, 2023 $ (49,722) $ (627) $ (50,349) Other comprehensive income (loss) before reclassification: Net unrealized gains (losses) (65,343) — (65,343) Reclassifications from OCI to net income: Pension and post-retirement — (8) (8) September 30, 2023 $ (115,065) $ (635) $ (115,700) June 30, 2024 $ (34,072) $ (1,519) $ (35,591) Other comprehensive income (loss) before reclassification: Net unrealized gains (losses) 30,517 — 30,517 Reclassifications from OCI to net income: Pension and post-retirement — 30 30 September 30, 2024 $ (3,555) $ (1,489) $ (5,044) December 31, 2022 $ (65,917) $ (610) $ (66,527) Other comprehensive income (loss) before reclassification: Net unrealized gains (losses) (48,659) — (48,659) Reclassifications from OCI to net income: Reclassification adjustment for net gains included in net income (489) — (489) Pension and post-retirement — (25) (25) September 30, 2023 $ (115,065) $ (635) $ (115,700) December 31, 2023 $ (72,862) $ 374 $ (72,488) Other comprehensive income (loss) before reclassification: Net unrealized gains (losses) 69,307 — 69,307 Reclassifications from OCI to net income: Pension and post-retirement — (1,863) (1,863) September 30, 2024 $ (3,555) $ (1,489) $ (5,044)

Transactions with Related Par_2

Transactions with Related Parties (Tables)	9 Months Ended
	Sep. 30, 2024
Related Party Transaction [Line Items]
Related Party Transactions, by Balance Sheet Grouping	The following table includes significant outstanding related party member-activity balances. (in thousands) September 30, 2024 December 31, 2023 Advances (1) $ 53,712,016 $ 45,435,931 Letters of credit (2) 20,190,928 20,225,736 MPF loans 287,805 202,529 Deposits 25,971 40,129 Capital stock 2,407,520 2,038,033 Notes: (1) Amount excludes accrued interest, deferred prepayment fees, and hedging adjustment (2) Letters of credit are off-balance sheet commitments.
Related Party Transactions, Income Statement	The following table summarizes the effects on the Statements of Income corresponding to the related party member balances above. Amounts related to interest expense on deposits were immaterial for the periods presented. Three months ended September 30, Nine months ended September 30, (in thousands) 2024 2023 2024 2023 Interest income on advances (1) $ 707,827 $ 601,408 $ 2,006,556 $ 1,824,881 Interest income on MPF loans 3,147 2,628 7,795 8,216 Letters of credit fees 6,112 8,067 17,946 19,127 Note: (1) Interest income on advances includes contractual interest income and prepayment fees. The effect of derivative activities is not included.
FHLBank of Chicago [Member]
Related Party Transaction [Line Items]
Schedule of Related Party Transactions, Mortgage Loans	The following table summarizes the effect of the MPF activities with FHLBank of Chicago. Three months ended September 30, Nine months ended September 30, (in thousands) 2024 2023 2024 2023 Servicing fee expense $ 987 $ 952 $ 2,944 $ 2,833 (in thousands) September 30, 2024 December 31, 2023 Interest-bearing deposits maintained with FHLBank of Chicago $ 5,616 $ 6,075

Estimated Fair Values (Tables)

Estimated Fair Values (Tables)	9 Months Ended
	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Fair Value, by Balance Sheet Grouping	The carrying value and estimated fair value of the Bank’s financial instruments at September 30, 2024 and December 31, 2023 are presented in the table below. Fair Value Summary Table September 30, 2024 (in thousands) Carrying Level 1 Level 2 Level 3 Netting Adjustment and Cash Collateral (1) Estimated Assets: Cash and due from banks $ 17,391 $ 17,391 $ — $ — $ — $ 17,391 Interest-bearing deposits 3,115,630 3,115,630 — — — 3,115,630 Securities purchased under agreements to resell (2) 4,780,000 — 4,780,006 — — 4,780,006 Federal funds sold 3,542,000 — 3,542,003 — — 3,542,003 Trading securities 156,729 — 156,729 — — 156,729 AFS securities 17,904,881 — 17,785,526 119,355 — 17,904,881 HTM securities 1,384,587 — 1,296,122 37,072 — 1,333,194 Advances 79,265,375 — 79,277,746 — — 79,277,746 Mortgage loans held for portfolio, net 4,746,742 — 4,312,900 — — 4,312,900 Accrued interest receivable 538,812 — 538,812 — — 538,812 Derivative assets 409,878 — 104,911 — 304,967 409,878 Liabilities: Deposits $ 704,863 $ — $ 704,863 $ — $ — $ 704,863 Discount notes 9,776,014 — 9,776,381 — — 9,776,381 Bonds 98,528,817 — 98,063,403 — — 98,063,403 Mandatorily redeemable capital stock (3) 27,554 28,175 — — — 28,175 Accrued interest payable (3) 625,184 — 624,563 — — 624,563 Derivative liabilities 12,087 — 358,625 — (346,538) 12,087 December 31, 2023 (in thousands) Carrying Level 1 Level 2 Level 3 Netting Adjustment and Cash Collateral (1) Estimated Assets: Cash and due from banks $ 11,509 $ 11,509 $ — $ — $ — $ 11,509 Interest-bearing deposits 3,110,803 3,110,803 — — — 3,110,803 Securities purchased under agreements to resell (2) 5,980,000 — 5,979,957 — — 5,979,957 Federal funds sold 2,533,000 — 2,532,983 — — 2,532,983 Trading securities 217,722 — 217,722 — — 217,722 AFS securities 14,822,933 — 14,697,125 125,808 — 14,822,933 HTM securities 1,339,759 — 1,231,090 41,656 — 1,272,746 Advances 78,431,508 — 78,364,403 — — 78,364,403 Mortgage loans held for portfolio, net 4,697,752 — 4,236,537 — — 4,236,537 Accrued interest receivable 517,361 — 517,361 — — 517,361 Derivative assets 408,507 — 206,615 — 201,892 408,507 Liabilities: Deposits $ 636,726 $ — $ 636,726 $ — $ — $ 636,726 Discount notes 13,683,580 — 13,678,683 — — 13,678,683 Bonds 90,801,032 — 90,267,686 — — 90,267,686 Mandatorily redeemable capital stock (3) 27,874 28,468 — — — 28,468 Accrued interest payable (3) 753,663 — 753,069 — — 753,069 Derivative liabilities 7,334 — 650,673 — (643,339) 7,334 Notes: (1) Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions and also cash collateral held and related interest accrued or placed by the Bank with the same clearing agent and/or counterparties. (2) Based on the fair value of the related collateral held, the securities purchased under agreements to resell were fully collateralized for the periods presented. There were no offsetting liabilities related to these securities at September 30, 2024 and December 31, 2023. These instruments’ maturity term is overnight. (3) The estimated fair value amount for the mandatorily redeemable capital stock line item includes accrued dividend interest; this amount is excluded from the estimated fair value for the accrued interest payable line item.
Fair Value Measurements	Fair Value Measurements. The following tables present, for each hierarchy level, the Bank’s assets and liabilities that are measured at fair value on a recurring or non-recurring basis on its Statements of Condition at September 30, 2024 and December 31, 2023. The Bank measures certain mortgage loans held for portfolio at fair value when a charge-off is recognized and subsequently when the fair value of collateral less costs to sell is lower than the carrying amount. Real estate owned is measured using fair value when the assets' fair value less costs to sell is lower than the carrying amount. September 30, 2024 (in thousands) Level 1 Level 2 Level 3 Netting Adjustment and Cash Collateral (1) Total Recurring fair value measurements - Assets Trading securities: Non MBS: GSE obligations $ — $ 156,729 $ — $ — $ 156,729 Total trading securities $ — $ 156,729 $ — $ — $ 156,729 AFS securities: Non MBS: U.S. Treasury obligations $ — $ 4,172,234 $ — $ — $ 4,172,234 GSE and TVA obligations — 938,989 — — 938,989 State or local agency obligations — 174,301 — — 174,301 MBS: U.S. obligations single-family — 1,894,417 — — 1,894,417 GSE single-family — 4,090,237 — — 4,090,237 GSE multifamily — 6,515,348 — — 6,515,348 Private label — — 119,355 — 119,355 Total AFS securities $ — $ 17,785,526 $ 119,355 $ — $ 17,904,881 Derivative assets: Interest rate related $ — $ 104,911 $ — $ 304,967 $ 409,878 Total derivative assets — 104,911 — 304,967 409,878 Total recurring assets at fair value $ — $ 18,047,166 $ 119,355 $ 304,967 $ 18,471,488 Recurring fair value measurements - Liabilities Derivative liabilities: Interest rate related $ — $ 358,233 $ — $ (346,538) $ 11,695 Mortgage delivery commitments — 392 — — 392 Total recurring liabilities at fair value $ — $ 358,625 $ — $ (346,538) $ 12,087 Non-recurring fair value measurements - Assets Impaired mortgage loans held for portfolio $ — $ — $ 6,168 $ — $ 6,168 REO — — 312 — 312 Total non-recurring assets at fair value $ — $ — $ 6,480 $ — $ 6,480 December 31, 2023 (in thousands) Level 1 Level 2 Level 3 Netting Adjustment and Cash Collateral (1) Total Recurring fair value measurements - Assets Trading securities: Non MBS: GSE obligations $ — $ 217,722 $ — $ — $ 217,722 Total trading securities $ — $ 217,722 $ — $ — $ 217,722 AFS securities: Non MBS: U.S. Treasury obligations $ — $ 3,676,037 $ — $ — $ 3,676,037 GSE and TVA obligations — 983,307 — — 983,307 State or local agency obligations — 174,111 — — 174,111 MBS: U.S. obligations single-family — 1,538,389 — — 1,538,389 GSE single-family — 2,047,752 — — 2,047,752 GSE multifamily — 6,277,529 — — 6,277,529 Private label — — 125,808 — 125,808 Total AFS securities $ — $ 14,697,125 $ 125,808 $ — $ 14,822,933 Derivative assets: Interest rate related $ — $ 206,460 $ — $ 201,892 $ 408,352 Mortgage delivery commitments — 155 — — 155 Total derivative assets $ — $ 206,615 $ — $ 201,892 $ 408,507 Total recurring assets at fair value $ — $ 15,121,462 $ 125,808 $ 201,892 $ 15,449,162 Recurring fair value measurements - Liabilities Derivative liabilities: Interest rate related $ — $ 650,647 $ — $ (643,339) $ 7,308 Mortgage delivery commitments — 26 — — 26 Total recurring liabilities at fair value $ — $ 650,673 $ — $ (643,339) $ 7,334 Non-recurring fair value measurements - Assets Impaired mortgage loans held for portfolio $ — $ — $ 6,859 $ — $ 6,859 REO — — 290 — 290 Total non-recurring assets at fair value $ — $ — $ 7,149 $ — $ 7,149 Note: (1)
Rollforward of Level 3 Assets and Liabilities	Level 3 Disclosures for all Assets and Liabilities That Are Measured at Fair Value on a Recurring Basis. The following table presents a reconciliation of all assets and liabilities that are measured at fair value on the Statements of Condition using significant unobservable inputs (Level 3) for the nine months ended September 30, 2024 and 2023. For instruments carried at fair value, the Bank reviews the fair value hierarchy classifications each quarter. Changes in the observability of the valuation attributes may result in a reclassification of certain financial assets or liabilities. Such reclassifications are reported as transfers in/out at fair value in the quarter in which the changes occur. There were no Level 3 transfers during the first nine months of 2024 or 2023. AFS Private Label MBS Three months ended September 30, Nine months ended September 30, (in thousands) 2024 2023 2024 2023 Balance, beginning of period $ 116,982 $ 134,685 $ 125,808 $ 142,271 Total gains (losses) (realized/unrealized) included in: (Provision) reversal for credit losses 889 (1,566) (1,061) (3,040) Accretion of credit losses in interest income 1,582 1,660 4,465 4,939 Net unrealized gains (losses) on AFS in OCI 3,780 (4,659) 1,505 (8,461) Settlements: Settlements (3,878) (3,263) (11,362) (8,852) Balance, end of period $ 119,355 $ 126,857 $ 119,355 $ 126,857 Total amount of gains for the periods presented included in earnings attributable to the change in unrealized gains (losses) relating to assets and liabilities still held at September 30 $ 2,471 $ 94 $ 3,404 $ 1,899 Change in unrealized gains (losses) for the period included in other comprehensive income (loss) for assets held at September 30 $ 3,780 $ (4,659) $ 1,505 $ (8,461)

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Off-Balance Sheet Commitments	The following table presents the Bank’s various off-balance sheet commitments which are described in detail below. The Bank deemed it unnecessary to record any liabilities for credit losses on these commitments at September 30, 2024 and December 31, 2023, based on the Bank’s credit extension and collateral policies. (in thousands) September 30, 2024 December 31, 2023 Notional amount Expiration Date Within One Year Expiration Date After One Year Total Total Standby letters of credit outstanding (1) (2) $ 30,897,854 $ — $ 30,897,854 $ 28,789,179 Commitments to purchase mortgage loans 21,095 — 21,095 30,028 Unsettled consolidated obligation discount notes, at par 845,790 — 845,790 — Unsettled consolidated obligation bonds, at par 461,000 — 461,000 78,000 Notes : (1) Excludes approved requests to issue future standby letters of credit of $94.1 million at September 30, 2024 and $32.0 million at December 31, 2023. (2) Letters of credit in the amount of $7.6 billion at September 30, 2024 and $7.0 billion at December 31, 2023, have renewal language that permits the letter of credit to be renewed for an additional period with a maximum renewal period of approximately five years.

Background Information (Details

Background Information (Details)	Sep. 30, 2024 Banks
Nature of Operations [Line Items]
Number of Federal Home Loan Banks	11
Minimum
Nature of Operations [Line Items]
Related Party Transaction, Definition Of Related Party, Capital Stock, Percent	10%

Investments Narrative (Details)

Investments Narrative (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses - HTM	$ 0	$ 0
Interest-Bearing Deposits and Federal Funds Sold, Percentage Rated Below Triple-B	0%
Securities Purchased Under Agreement to Resell, Percentage Rated Below Triple-B	0%
Securities Purchased under Agreements to Resell, Allowance for Credit Loss	$ 0	0
Securities Purchased Under Agreement to Resell, Percentage Rated Above Triple-B	1,280%
TradedNotSettldInvestments	$ 52.9	346.6
TradedNotSettldInvestments	52.9	346.6
AFS HTM - GSE and Other US Obligations [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Credit Loss	0	0
Interest Bearing Deposits and Federal Funds Sold
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Credit Loss	0	0
State or local agency obligations [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Credit Loss	$ 0	$ 0

Trading Securities (Details)

Trading Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Investments, Debt and Equity Securities [Line Items]
Securities Purchased Under Agreement to Resell, Percentage Rated Above Triple-B	1,280%
GSE obligations
Investments, Debt and Equity Securities [Line Items]
Trading securities	$ 156,729	$ 217,722

Trading Securities (Net Gains (

Trading Securities (Net Gains (Losses) on Trading Securities) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Investments, Debt and Equity Securities [Abstract]
Net unrealized gains (losses) on trading securities held at period-end	$ 4,165	$ (2,437)	$ 2,787	$ (1,566)
Net gains (losses) on trading securities	4,303	(2,437)	3,279	(1,566)
Net gains (losses) on trading securities sold/matured during the period	$ 138	$ 0	$ 492	$ 0

Investments AFS - Schedule of R

Investments AFS - Schedule of Reconciliation Table (Details) - USD ($)		Sep. 30, 2024		Jun. 30, 2024	Dec. 31, 2023		Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
AFS Securities - Amortized Cost,		$ 17,921,485,000			$ 14,907,783,000	[1]
Balance, beginning of period		13,049,000		$ 13,938,000	11,988,000		$ 11,572,000	$ 10,006,000	$ 8,532,000
Gross Unrealized Gains		65,639,000			44,448,000
Gross Unrealized Losses		(69,194,000)			(117,310,000)
Available-for-Sale - Accrued Interest		62,800,000			52,400,000
Fair Value		$ 17,904,881,000			$ 14,822,933,000
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]		Accrued interest receivable			Accrued interest receivable
GSE obligations
Debt Securities, Available-for-sale [Line Items]
AFS Securities - Amortized Cost,	[1]	$ 920,864,000			$ 967,074,000
Balance, beginning of period		0			0
Gross Unrealized Gains		19,373,000			18,218,000
Gross Unrealized Losses		(1,248,000)			(1,985,000)
Fair Value		938,989,000			983,307,000
State or local agency obligations [Member]
Debt Securities, Available-for-sale [Line Items]
AFS Securities - Amortized Cost,	[1]	182,700,000			183,430,000
Balance, beginning of period		0			0
Gross Unrealized Gains		10,000			19,000
Gross Unrealized Losses		(8,409,000)			(9,338,000)
Fair Value		174,301,000			174,111,000
Non-MBS [Member]
Debt Securities, Available-for-sale [Line Items]
AFS Securities - Amortized Cost,	[1]	5,276,304,000			4,833,549,000
Balance, beginning of period		0			0
Gross Unrealized Gains		23,328,000			19,582,000
Gross Unrealized Losses		(14,108,000)			(19,676,000)
Fair Value		5,285,524,000			4,833,455,000
U.S. obligations single-family
Debt Securities, Available-for-sale [Line Items]
AFS Securities - Amortized Cost,	[1]	1,897,775,000			1,551,915,000
Balance, beginning of period		0			0
Gross Unrealized Gains		5,681,000			3,161,000
Gross Unrealized Losses		(9,039,000)			(16,687,000)
Fair Value		1,894,417,000			1,538,389,000
Private label MBS [Member]
Debt Securities, Available-for-sale [Line Items]
AFS Securities - Amortized Cost,	[1]	126,735,000			133,632,000
Balance, beginning of period		13,049,000			11,988,000
Gross Unrealized Gains		6,704,000			7,609,000
Gross Unrealized Losses		(1,035,000)			(3,445,000)
Fair Value		119,355,000			125,808,000
MBS [Member]
Debt Securities, Available-for-sale [Line Items]
AFS Securities - Amortized Cost,	[1]	12,645,181,000			10,074,234,000
Balance, beginning of period		13,049,000			11,988,000
Gross Unrealized Gains		42,311,000			24,866,000
Gross Unrealized Losses		(55,086,000)			(97,634,000)
Fair Value		12,619,357,000			9,989,478,000
U.S. Treasury obligations
Debt Securities, Available-for-sale [Line Items]
AFS Securities - Amortized Cost,		4,172,740,000	[1]		3,683,045,000
Balance, beginning of period		0			0
Gross Unrealized Gains		3,945,000			1,345,000
Gross Unrealized Losses		(4,451,000)			(8,353,000)
Fair Value		4,172,234,000			3,676,037,000
Single Family [Member] | GSE MBS [Member]
Debt Securities, Available-for-sale [Line Items]
AFS Securities - Amortized Cost,	[1]	4,112,428,000			2,095,261,000
Balance, beginning of period		0			0
Gross Unrealized Gains		9,903,000			5,174,000
Gross Unrealized Losses		(32,094,000)			(52,683,000)
Fair Value		4,090,237,000			2,047,752,000
Multifamily [Member] | GSE MBS [Member]
Debt Securities, Available-for-sale [Line Items]
AFS Securities - Amortized Cost,	[1]	6,508,243,000			6,293,426,000
Balance, beginning of period		0			0
Gross Unrealized Gains		20,023,000			8,922,000
Gross Unrealized Losses		(12,918,000)			(24,819,000)
Fair Value		$ 6,515,348,000			$ 6,277,529,000
[1] Includes adjustments made to the cost basis of an investment for accretion, amortization and/or fair value hedge accounting adjustments, and excludes accrued interest receivable

Investments AFS - Unrealized Lo

Investments AFS - Unrealized Loss Position Table (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
AFS - Fair Value - Less than 12 Months	$ 3,345,195	$ 6,255,765
AFS - Unrealized Losses - Less than 12 months	(4,548)	(30,368)
AFS - Fair Value - 12 months or longer	4,895,233	3,924,606
AFS - Unrealized Losses - 12 months or longer	(64,646)	(86,942)
AFS - Fair Value - Total in Continuous Loss Position	8,240,428	10,180,371
AFS - Unrealized Losses - Total in Continuous Loss Position	(69,194)	(117,310)
GSE obligations
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
AFS - Fair Value - Less than 12 Months	0	0
AFS - Unrealized Losses - Less than 12 months	0	0
AFS - Fair Value - 12 months or longer	26,482	32,837
AFS - Unrealized Losses - 12 months or longer	(1,248)	(1,985)
AFS - Fair Value - Total in Continuous Loss Position	26,482	32,837
AFS - Unrealized Losses - Total in Continuous Loss Position	(1,248)	(1,985)
State or local agency obligations [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
AFS - Fair Value - Less than 12 Months	6,586	2,229
AFS - Unrealized Losses - Less than 12 months	(29)	(11)
AFS - Fair Value - 12 months or longer	150,380	149,653
AFS - Unrealized Losses - 12 months or longer	(8,380)	(9,327)
AFS - Fair Value - Total in Continuous Loss Position	156,966	151,882
AFS - Unrealized Losses - Total in Continuous Loss Position	(8,409)	(9,338)
Non-MBS [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
AFS - Fair Value - Less than 12 Months	2,092,896	2,658,135
AFS - Unrealized Losses - Less than 12 months	(2,400)	(4,577)
AFS - Fair Value - 12 months or longer	248,585	276,899
AFS - Unrealized Losses - 12 months or longer	(11,708)	(15,099)
AFS - Fair Value - Total in Continuous Loss Position	2,341,481	2,935,034
AFS - Unrealized Losses - Total in Continuous Loss Position	(14,108)	(19,676)
U.S. obligations single-family
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
AFS - Fair Value - Less than 12 Months	94,988	722,587
AFS - Unrealized Losses - Less than 12 months	(87)	(5,968)
AFS - Fair Value - 12 months or longer	832,522	291,262
AFS - Unrealized Losses - 12 months or longer	(8,952)	(10,719)
AFS - Fair Value - Total in Continuous Loss Position	927,510	1,013,849
AFS - Unrealized Losses - Total in Continuous Loss Position	(9,039)	(16,687)
Private label MBS [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
AFS - Fair Value - Less than 12 Months	0	18,497
AFS - Unrealized Losses - Less than 12 months	0	(686)
AFS - Fair Value - 12 months or longer	34,540	27,259
AFS - Unrealized Losses - 12 months or longer	(1,035)	(2,759)
AFS - Fair Value - Total in Continuous Loss Position	34,540	45,756
AFS - Unrealized Losses - Total in Continuous Loss Position	(1,035)	(3,445)
MBS [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
AFS - Fair Value - Less than 12 Months	1,252,299	3,597,630
AFS - Unrealized Losses - Less than 12 months	(2,148)	(25,791)
AFS - Fair Value - 12 months or longer	4,646,648	3,647,707
AFS - Unrealized Losses - 12 months or longer	(52,938)	(71,843)
AFS - Fair Value - Total in Continuous Loss Position	5,898,947	7,245,337
AFS - Unrealized Losses - Total in Continuous Loss Position	(55,086)	(97,634)
U.S. Treasury obligations
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
AFS - Fair Value - Less than 12 Months	2,086,310	2,655,906
AFS - Unrealized Losses - Less than 12 months	(2,371)	(4,566)
AFS - Fair Value - 12 months or longer	71,723	94,409
AFS - Unrealized Losses - 12 months or longer	(2,080)	(3,787)
AFS - Fair Value - Total in Continuous Loss Position	2,158,033	2,750,315
AFS - Unrealized Losses - Total in Continuous Loss Position	(4,451)	(8,353)
Single Family [Member] | GSE MBS [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
AFS - Fair Value - Less than 12 Months	296,832	205,891
AFS - Unrealized Losses - Less than 12 months	(155)	(2,279)
AFS - Fair Value - 12 months or longer	1,386,940	1,329,086
AFS - Unrealized Losses - 12 months or longer	(31,939)	(50,404)
AFS - Fair Value - Total in Continuous Loss Position	1,683,772	1,534,977
AFS - Unrealized Losses - Total in Continuous Loss Position	(32,094)	(52,683)
Multifamily [Member] | GSE MBS [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
AFS - Fair Value - Less than 12 Months	860,479	2,650,655
AFS - Unrealized Losses - Less than 12 months	(1,906)	(16,858)
AFS - Fair Value - 12 months or longer	2,392,646	2,000,100
AFS - Unrealized Losses - 12 months or longer	(11,012)	(7,961)
AFS - Fair Value - Total in Continuous Loss Position	3,253,125	4,650,755
AFS - Unrealized Losses - Total in Continuous Loss Position	$ (12,918)	$ (24,819)

Investments AFS - Contractual M

Investments AFS - Contractual Maturities Table (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Fair Value		$ 17,904,881	$ 14,822,933
AFS Securities - Amortized Cost,		17,921,485	14,907,783	[1]
Non-MBS [Member]
Debt Securities, Available-for-sale [Line Items]
AFS - Non-MBS - Due in one year or less - Amortized Cost		271,744	100,351
AFS - Non-MBS - Due after one year through five years - Amortized Cost		4,092,249	4,022,388
AFS - Non-MBS - Due after five through ten years - Amortized Cost		790,816	588,935
AFS - Non-MBS - Due after 10 years - Amortized Cost		121,495	121,875
AFS - Non-MBS - Due in one year or less - Fair Value		272,320	100,521
AFS - Non-MBS - Due after one year through five years - Fair Value		4,101,984	4,024,322
AFS - Non-MBS - Due after five through ten years - Fair Value		796,207	594,033
AFS - Non-MBS - Due after 10 years - Fair Value		115,013	114,579
Fair Value		5,285,524	4,833,455
AFS Securities - Amortized Cost,	[1]	5,276,304	4,833,549
MBS [Member]
Debt Securities, Available-for-sale [Line Items]
Fair Value		12,619,357	9,989,478
AFS Securities - Amortized Cost,	[1]	$ 12,645,181	$ 10,074,234
[1] Includes adjustments made to the cost basis of an investment for accretion, amortization and/or fair value hedge accounting adjustments, and excludes accrued interest receivable

Investments AFS - Interest Rate

Investments AFS - Interest Rate Payment Terms Table (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
AFS Securities - Amortized Cost,		$ 17,921,485	$ 14,907,783	[1]
Non-MBS [Member]
Debt Securities, Available-for-sale [Line Items]
AFS Securities - Amortized Cost,	[1]	5,276,304	4,833,549
MBS [Member]
Debt Securities, Available-for-sale [Line Items]
AFS Securities - Amortized Cost,	[1]	12,645,181	10,074,234
Fixed Interest Rate [Member] | Non-MBS [Member]
Debt Securities, Available-for-sale [Line Items]
AFS Securities - Amortized Cost,		5,276,304	4,833,549
Fixed Interest Rate [Member] | MBS [Member]
Debt Securities, Available-for-sale [Line Items]
AFS Securities - Amortized Cost,		4,341,525	3,804,161
Variable interest rate [Member] | MBS [Member]
Debt Securities, Available-for-sale [Line Items]
AFS Securities - Amortized Cost,		$ 8,303,656	$ 6,270,073
[1] Includes adjustments made to the cost basis of an investment for accretion, amortization and/or fair value hedge accounting adjustments, and excludes accrued interest receivable

Investments, Gain Loss on Sales

Investments, Gain Loss on Sales of AFS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Investments, Debt and Equity Securities [Abstract]
Debt Securities, Available-for-Sale, Realized Gain	$ 0	$ 0	$ 0	$ 489
Securities Purchased Under Agreement to Resell, Percentage Rated Above Triple-B	1,280%		1,280%

Investments HTM - Securities by

Investments HTM - Securities by Major Security Type Table (Details) - USD ($) $ in Thousands		Sep. 30, 2024		Dec. 31, 2023
Schedule of Held-to-maturity Securities [Line Items]
HTM securities; fair value of $1,333,194 and $1,272,746	[1]	$ 1,384,587		$ 1,339,759
Gross Unrealized Holding Gains		5,200		6,355
Gross Unrealized Holding Losses		(56,593)		(73,368)
HTM securities - fair value		1,333,194		1,272,746
HTM - Accrued Interest		$ 5,000		$ 4,700
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. obligations single-family
Schedule of Held-to-maturity Securities [Line Items]
HTM securities; fair value of $1,333,194 and $1,272,746		$ 700,682	[1]	$ 608,937
Gross Unrealized Holding Gains		4,290		4,962
Gross Unrealized Holding Losses		(3,142)		(5,362)
HTM securities - fair value		701,830		608,537
Private label MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
HTM securities; fair value of $1,333,194 and $1,272,746		38,721	[1]	44,525
Gross Unrealized Holding Gains		1		0
Gross Unrealized Holding Losses		(1,650)		(2,869)
HTM securities - fair value		37,072		41,656
MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
HTM securities; fair value of $1,333,194 and $1,272,746		1,384,587	[1]	1,339,759
Gross Unrealized Holding Gains		5,200		6,355
Gross Unrealized Holding Losses		(56,593)		(73,368)
HTM securities - fair value		1,333,194		1,272,746
Single Family [Member] | GSE MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
HTM securities; fair value of $1,333,194 and $1,272,746		400,836	[1]	440,752
Gross Unrealized Holding Gains		909		1,393
Gross Unrealized Holding Losses		(49,589)		(58,407)
HTM securities - fair value		352,156		383,738
Multifamily [Member] | GSE MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
HTM securities; fair value of $1,333,194 and $1,272,746		244,348	[1]	245,545
Gross Unrealized Holding Gains		0		0
Gross Unrealized Holding Losses		(2,212)		(6,730)
HTM securities - fair value		$ 242,136		$ 238,815
[1] Includes adjustments made to the cost basis of an investment for accretion and amortization and excludes accrued interest receivable

Investments HTM - Contractual M

Investments HTM - Contractual Maturity Table (Details) - USD ($) $ in Thousands		Sep. 30, 2024		Dec. 31, 2023
Schedule of Held-to-maturity Securities [Line Items]
HTM securities; fair value of $1,333,194 and $1,272,746	[1]	$ 1,384,587		$ 1,339,759
HTM securities		1,333,194		1,272,746
MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
HTM securities; fair value of $1,333,194 and $1,272,746		1,384,587	[1]	1,339,759
HTM securities		$ 1,333,194		$ 1,272,746
[1] Includes adjustments made to the cost basis of an investment for accretion and amortization and excludes accrued interest receivable

Investments HTM - Interest Rate

Investments HTM - Interest Rate Payment Terms (Details) - USD ($) $ in Thousands		Sep. 30, 2024		Dec. 31, 2023
Schedule of Held-to-maturity Securities [Line Items]
HTM - Amortized Cost	[1]	$ 1,384,587		$ 1,339,759
MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
HTM - Amortized Cost		1,384,587	[1]	1,339,759
Fixed Interest Rate [Member] | MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
HTM - Amortized Cost		1,289,721		1,230,759
Variable interest rate [Member] | MBS [Member]
Schedule of Held-to-maturity Securities [Line Items]
HTM - Amortized Cost		$ 94,866		$ 109,000
[1] Includes adjustments made to the cost basis of an investment for accretion and amortization and excludes accrued interest receivable

Investments AFS - Allowance Rol

Investments AFS - Allowance Rollforward Table (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
AFS - Allowance - beginning	$ 13,938	$ 10,006	$ 11,988	$ 8,532
Increases (decreases) for securities with a previous ACL or OTTI recorded	(889)	1,566	1,061	3,040
Balance, end of period	$ 13,049	$ 11,572	$ 13,049	$ 11,572

Advances (Details)

Advances (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Federal Home Loan Bank Advances
Total Par Value	$ 79,296,921	$ 78,647,198
Federal Home Loan Bank, Advances, Five Largest Borrowers Amount Outstanding	$ 64,100,000	$ 62,400,000
Number Of Top Advances Borrowers	5	5
Federal Home Loan Bank, Advances, Five Largest Borrowers, Percent of Total	80.80%	79.30%
Federal Home Loan Bank, Advances, Borrowers With Outstanding Loan Balances Greater Than Ten Percent	2	2
Maximum
Federal Home Loan Bank Advances
Federal Home Loan Bank, Advances, Maturity Period, Fixed Rate	30 years
Federal Home Loan Bank, Advances, Maturity Period, Variable Rate	30 years

Advances (Portfolio by Year of

Advances (Portfolio by Year of Contractual Maturity) (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Federal Home Loan Bank, Advances [Line Items]
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]
Due in 1 year or less	5.02%	5.35%
Due after 1 year through 2 years	4.91%	5.17%
Due after 2 years through 3 years	4.29%	5.24%
Due after 3 years through 4 years	4.30%	3.97%
Due after 4 years through 5 years	4.65%	4.29%
Thereafter	3.38%	3.33%
Total par value, Weighted Average Interest Rate	4.93%	5.24%
Federal Home Loan Bank, Advances, Maturity, Rolling Year, Par Value [Abstract]
Due in 1 year or less	$ 59,628,917	$ 46,380,744
Due after 1 year through 2 years	11,971,793	19,483,400
Due after 2 years through 3 years	5,077,355	9,308,565
Due after 3 years through 4 years	2,080,512	1,909,905
Due after 4 years through 5 years	379,048	1,395,177
Thereafter	159,296	169,407
Total Par Value	79,296,921	78,647,198
Deferred prepayment fees	(253)	(537)
Hedging adjustments	(31,293)	(215,153)
Total book value	79,265,375	78,431,508
Federal Home Loan Bank Advances
Federal Home Loan Bank, Advances [Line Items]
Accrued Interest - Advances	$ 433,100	$ 422,700

Advances (Advances by Year of C

Advances (Advances by Year of Contractual Maturity or Next Call Date or Next Convertible Date) (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Advances [Abstract]
Due in 1 year or less	$ 59,823,917	$ 46,420,744
Due after 1 year through 2 years	11,966,793	19,458,400
Due after 2 years through 3 years	5,054,855	9,293,565
Due after 3 years through 4 years	2,028,012	1,909,905
Due after 4 years through 5 years	264,048	1,395,177
Thereafter	159,296	169,407
Total Par Value	$ 79,296,921	$ 78,647,198

Advances (Interest Rate Payment

Advances (Interest Rate Payment Terms) (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Federal Home Loan Bank, Advances, Fixed Rate [Abstract]
Fixed rate – overnight	$ 2,248,697	$ 1,739,567
Due in 1 year or less	11,598,494	15,218,445
Thereafter	10,163,004	13,216,455
Total Fixed Rate	24,010,195	30,174,467
Federal Home Loan Bank, Advances, Floating Rate [Abstract]
Due in 1 year or less	45,781,726	29,422,731
Thereafter	9,505,000	19,050,000
Total Variable Rate	55,286,726	48,472,731
Total Par Value	$ 79,296,921	$ 78,647,198

Mortgage Loans Held for Portf_3

Mortgage Loans Held for Portfolio (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Mortgage Loans held for portfolio [Line Items]
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]		Accrued interest receivable		Accrued interest receivable
Fixed-rate single-family mortgages		$ 4,696,203		$ 4,643,615
Government-guaranteed/insured loans
Mortgage Loans held for portfolio [Line Items]
Fixed-rate single-family mortgages		95,237		103,632
Conventional MPF Loan [Member]
Mortgage Loans held for portfolio [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	[1]	4,651,917		4,594,909
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	[1]	1,522,331		1,182,190
Fixed-rate single-family mortgages		4,600,966		4,539,983
Mortgage loans held for portfolio, net
Mortgage Loans held for portfolio [Line Items]
Premiums		66,838		68,667
Discounts		(11,699)		(11,968)
Hedging adjustments		(2,206)		456
Loans and Leases Receivable, Net of Deferred Income, Total	[2]	4,749,136		4,700,770
Allowance for credit losses on mortgage loans		(2,394)		(3,018)
Mortgage loans held for portfolio, net		4,746,742		4,697,752
Accrued Interest - Mortgage loans held for portfolio		26,200		25,100
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process		4,696,203		4,643,615
Mortgage loans held for portfolio, net | Government-guaranteed/insured loans
Mortgage Loans held for portfolio [Line Items]
Allowance for credit losses on mortgage loans		0		0
Mortgage loans held for portfolio, net | Conventional MPF Loan [Member]
Mortgage Loans held for portfolio [Line Items]
Allowance for credit losses on mortgage loans		(2,394)	$ (2,694)	(3,018)	$ (2,971)	$ (3,256)	$ (3,240)
Single Family [Member] | Fixed-rate long-term single-family mortgages (1)
Mortgage Loans held for portfolio [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process	[3]	4,595,698		4,527,088
Single Family [Member] | Fixed-rate medium-term single-family mortgages (2)
Mortgage Loans held for portfolio [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process	[3]	$ 100,505		$ 116,527
[1] The amortized cost at September 30, 2024 and December 31, 2023 excludes accrued interest receivable. accrued interest receivable Long-term is defined as an original term of greater than 15 years and up to 30 years. (2) Medium-term is defined as an original term of 15 years or less.

Mortgage Loans Held for Portf_4

Mortgage Loans Held for Portfolio Credit Quality Indicators (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Mortgage Loans in Process of Foreclosure, Amount	[1]	$ 5,529	$ 6,892
Mortgage loans held for portfolio, net
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	[2]	4,749,136	4,700,770
Financing Receivable, 90 Days or More Past Due, Still Accruing		2,350	2,137
Financing Receivable, Excluding Accrued Interest, Nonaccrual		24,210	23,002
Government-guaranteed/insured loans
Financing Receivable, Credit Quality Indicator [Line Items]
Mortgage Loans in Process of Foreclosure, Amount	[1]	516	960
Government-guaranteed/insured loans | Mortgage loans held for portfolio, net
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, 90 Days or More Past Due, Still Accruing		2,350	2,137
Financing Receivable, Excluding Accrued Interest, Nonaccrual		0	0
Conventional MPF Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated, Current Fiscal Year and Preceeding Four Preceeding Fiscal Years	[3]	3,129,586	3,412,719
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	[3]	4,651,917	4,594,909
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	[3]	1,522,331	1,182,190
Mortgage Loans in Process of Foreclosure, Amount	[1]	5,013	5,932
Conventional MPF Loan [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		42,613
Conventional MPF Loan [Member] | Mortgage loans held for portfolio, net
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, 90 Days or More Past Due, Still Accruing		0	0
Financing Receivable, Excluding Accrued Interest, Nonaccrual		24,210	23,002
Financial Asset, 30 to 59 Days Past Due [Member] | Conventional MPF Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated, Current Fiscal Year and Preceeding Four Preceeding Fiscal Years		16,600	20,959
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		39,407	39,091
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		22,807	18,132
Financial Asset, 60 to 89 Days Past Due [Member] | Conventional MPF Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated, Current Fiscal Year and Preceeding Four Preceeding Fiscal Years		6,984	9,740
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		15,010	16,112
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		$ 8,026	$ 6,372
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Mortgage loans held for portfolio, net
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Percent Past Due	[4]	0.50%	0.40%
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Government-guaranteed/insured loans | Mortgage loans held for portfolio, net
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Percent Past Due	[4]	2.40%	2%
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Conventional MPF Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated, Current Fiscal Year and Preceeding Four Preceeding Fiscal Years		$ 7,999	$ 9,171
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		19,779	18,103
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		$ 11,780	$ 8,932
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Conventional MPF Loan [Member] | Mortgage loans held for portfolio, net
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Percent Past Due	[4]	0.40%	0.40%
Financial Asset, Past Due | Conventional MPF Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated, Current Fiscal Year and Preceeding Four Preceeding Fiscal Years		$ 31,583	$ 39,870
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		74,196	73,306
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year			33,436
Financial Asset, Not Past Due | Conventional MPF Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated, Current Fiscal Year and Preceeding Four Preceeding Fiscal Years		3,098,003	3,372,849
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		4,577,721	4,521,603
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year		$ 1,479,718	$ 1,148,754
[1] Includes loans where the decision of foreclosure or similar alternative such as pursuit of deed-in-lieu has been reported. Loans in process of foreclosure are included in past due or current loans dependent on their delinquency status. accrued interest receivable The amortized cost at September 30, 2024 and December 31, 2023 excludes accrued interest receivable. Loans that are 90 days or more past due or in the process of foreclosure expressed as a percentage of the total loan portfolio class.

Mortgage Loans Held for Portf_5

Mortgage Loans Held for Portfolio MPF -Allowance Roll Forward Table (Details) - Mortgage loans held for portfolio, net - 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]
MPF - Allowance for Credit Loss - Beginning Balance				$ 3,018
MPF -Allowance for Credit Loss - Ending Balance		$ 2,394		2,394
Conventional MPF Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
MPF - Allowance for Credit Loss - Beginning Balance		2,694	$ 3,256	3,018	$ 3,240
(Charge-offs) Recoveries, net	[1]	342	21	698	(9)
Provision( reversal) for credit losses		(42)	264	(74)	278
MPF -Allowance for Credit Loss - Ending Balance		$ 2,394	$ 2,971	$ 2,394	$ 2,971
[1] Net charge-offs that the Bank does not expect to recover through CE receivable.

Mortgage Loans Held for Portf_6

Mortgage Loans Held for Portfolio Narrative (Details) - Mortgage loans held for portfolio, net - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Excluding Accrued Interest, Nonaccrual	$ 24,210	$ 23,002
Government-guaranteed/insured loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Excluding Accrued Interest, Nonaccrual	0	0
Conventional MPF Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Excluding Accrued Interest, Nonaccrual	$ 24,210	$ 23,002

Derivatives and Hedging Activ_2

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		$ 55,721,896	$ 85,397,208
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		104,911	206,615
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		358,625	650,673
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	[1],[2]	304,967	201,892
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	[2]	(346,538)	(643,339)	[1]
Derivative assets		409,878	408,507
Derivative liabilities		12,087	7,334
Cash Collateral posted		661,700	854,600
Cash Collateral received		10,200	9,400
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		50,879,656	81,226,968
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		92,971	199,554
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		346,532	632,508
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		4,842,240	4,170,240
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		11,940	7,061
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		12,093	18,165
Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		2,796,145	2,615,212
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		9,312	2,037
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		11,701	18,139
Not Designated as Hedging Instrument [Member] | Interest Rate Caps or Floors [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		2,025,000	1,525,000
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		2,628	4,869
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		0	0
Mortgage Receivable [Member] | Not Designated as Hedging Instrument [Member] | Forward Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		21,095	30,028
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		0	155
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		$ 392	$ 26
[1] Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions and also cash collateral held and related interest accrued or placed by the Bank with the same clearing agent and/or counterparties.

Derivatives and Hedging Activ_3

Derivatives and Hedging Activities (Derivatives in Statement of Income and Impact on Interest) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table]			The following table presents, by type of hedged item, the gains (losses) on derivatives and the related hedged items in fair value hedging relationships, which also includes amortization of basis adjustments related to hedged items in discontinued fair value hedge relationships, and the impact of those derivatives on the Bank’s net interest income. Also included is the amortization of basis adjustments related to mortgage delivery commitments, which are characterized as derivatives, but are not designated in fair value hedge relationships. (in thousands) Gains/(Losses) on Derivative Gains/ (Losses) on Hedged Item Net Interest Settlements Effect of Derivatives on Net Interest Income Total Interest Income/ (Expense) Recorded in the Statements of Income Three months ended September 30, 2024 Hedged item type: Advances $ (245,715) $ 245,823 $ 74,955 $ 75,063 $ 1,058,730 AFS securities (292,757) 289,817 56,888 53,948 262,123 Mortgage loans held for portfolio — (91) — (91) 42,555 Consolidated obligations – discount notes 1,841 (1,638) (995) (792) (143,277) Consolidated obligations – bonds 298,007 (298,041) (124,212) (124,246) (1,238,603) Total $ (238,624) $ 235,870 $ 6,636 $ 3,882 Nine months ended September 30, 2024 Hedged item type: Advances $ (183,617) $ 183,856 $ 241,114 $ 241,353 $ 3,147,401 AFS securities (164,311) 161,450 163,526 160,665 735,937 Mortgage loans held for portfolio — (256) — (256) 124,967 Consolidated obligations – discount notes 823 (1,079) (3,723) (3,979) (466,347) Consolidated obligations – bonds 344,215 (343,370) (414,514) (413,669) (3,558,550) Total $ (2,890) $ 601 $ (13,597) $ (15,886) (in thousands) Gains/(Losses) on Derivative Gains/ (Losses) on Hedged Item Net Interest Settlements Effect of Derivatives on Net Interest Income Total Interest Income/ (Expense) Recorded in the Statements of Income Three months ended September 30, 2023 Hedged item type: Advances $ 36,853 $ (36,808) $ 91,203 $ 91,248 $ 1,071,029 AFS securities 138,160 (138,366) 47,439 47,233 190,518 Mortgage loans held for portfolio — (119) — (119) 37,516 Consolidated obligations - discount notes 4,507 (2,215) (4,712) (2,420) (220,233) Consolidated obligations – bonds 53,846 (54,243) (179,861) (180,258) (1,079,869) Total $ 233,366 $ (231,751) $ (45,931) $ (44,316) Nine months ended September 30, 2023 Hedged item type: Advances $ 119,382 $ (119,191) $ 225,959 $ 226,150 $ 3,120,857 AFS securities 100,815 (100,467) 138,872 139,220 516,045 Mortgage loans held for portfolio — (423) — (423) 108,824 Consolidated obligations - discount notes 3,573 (5,584) (6,778) (8,789) (943,590) Consolidated obligations – bonds 66,758 (67,189) (450,544) (450,975) (2,778,910) $ 290,528 $ (292,854) $ (92,491) $ (94,817)
Gains/(Losses) on Derivative	$ (238,624)	$ 233,366	$ (2,890)	$ 290,528
Gains/(Losses) on Hedged Item	235,870	(231,751)	601	(292,854)
Net Interest Settlements on FV Hedges	6,636	(45,931)	(13,597)	(92,491)
Gain (Loss) on Fair Value Hedges Recognized in Net Interest Income	3,882	(44,316)	(15,886)	(94,817)
Advances	1,058,730	1,071,029	3,147,401	3,120,857
Available-for-sale (AFS) securities	262,123	190,518	735,937	516,045
Mortgage loans held for portfolio	42,555	37,516	124,967	108,824
Consolidated obligations - bonds	1,238,603	1,079,869	3,558,550	2,778,910
Consolidated obligations - discount notes	(143,277)	(220,233)	(466,347)	(943,590)
Net gains (losses) related to derivatives not designated as hedging instruments	(17,965)	7,270	(10,618)	21,216
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) on Derivative	(238,624)	233,366	(2,890)	290,528
Gains/(Losses) on Hedged Item	235,870	(231,751)	601	(292,854)
Net Interest Settlements on FV Hedges	6,636	(45,931)	(13,597)	(92,491)
Gain (Loss) on Fair Value Hedges Recognized in Net Interest Income	3,882	(44,316)	(15,886)	(94,817)
Advances	1,058,730	1,071,029	3,147,401	3,120,857
Available-for-sale (AFS) securities	262,123	190,518	735,937	516,045
Mortgage loans held for portfolio	42,555	37,516	124,967	108,824
Consolidated obligations - bonds	1,238,603	1,079,869	3,558,550	2,778,910
Consolidated obligations - discount notes	(143,277)	(220,233)	(466,347)	(943,590)
Net gains (losses) related to derivatives not designated as hedging instruments	(17,965)	7,270	(10,618)	21,216
Other Contract [Member]
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Net gains (losses) related to derivatives not designated as hedging instruments	0	0	1	1
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) related to derivatives not designated as hedging instruments	0	0	1	1
Interest Income [Member] | Advances [Member]
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gains/(Losses) on Derivative	(245,715)	36,853	(183,617)	119,382
Gains/(Losses) on Hedged Item	245,823	(36,808)	183,856	(119,191)
Net Interest Settlements on FV Hedges	74,955	91,203	241,114	225,959
Gain (Loss) on Fair Value Hedges Recognized in Net Interest Income	75,063	91,248	241,353	226,150
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) on Derivative	(245,715)	36,853	(183,617)	119,382
Gains/(Losses) on Hedged Item	245,823	(36,808)	183,856	(119,191)
Net Interest Settlements on FV Hedges	74,955	91,203	241,114	225,959
Gain (Loss) on Fair Value Hedges Recognized in Net Interest Income	75,063	91,248	241,353	226,150
Interest Income [Member] | Available-for-sale Securities
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gains/(Losses) on Derivative	(292,757)	138,160	(164,311)	100,815
Gains/(Losses) on Hedged Item	289,817	(138,366)	161,450	(100,467)
Net Interest Settlements on FV Hedges	56,888	47,439	163,526	138,872
Gain (Loss) on Fair Value Hedges Recognized in Net Interest Income	53,948	47,233	160,665	139,220
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) on Derivative	(292,757)	138,160	(164,311)	100,815
Gains/(Losses) on Hedged Item	289,817	(138,366)	161,450	(100,467)
Net Interest Settlements on FV Hedges	56,888	47,439	163,526	138,872
Gain (Loss) on Fair Value Hedges Recognized in Net Interest Income	53,948	47,233	160,665	139,220
Interest Income [Member] | Mortgage Receivable [Member]
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gains/(Losses) on Derivative	0	0	0	0
Gains/(Losses) on Hedged Item	(91)	(119)	(256)	(423)
Net Interest Settlements on FV Hedges	0	0	0	0
Gain (Loss) on Fair Value Hedges Recognized in Net Interest Income	(91)	(119)	(256)	(423)
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) on Derivative	0	0	0	0
Gains/(Losses) on Hedged Item	(91)	(119)	(256)	(423)
Net Interest Settlements on FV Hedges	0	0	0	0
Gain (Loss) on Fair Value Hedges Recognized in Net Interest Income	(91)	(119)	(256)	(423)
Interest Expense [Member] | Consolidated Obligations Bonds [Member]
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gains/(Losses) on Derivative	298,007	53,846	344,215	66,758
Gains/(Losses) on Hedged Item	(298,041)	(54,243)	(343,370)	(67,189)
Net Interest Settlements on FV Hedges	(124,212)	(179,861)	(414,514)	(450,544)
Gain (Loss) on Fair Value Hedges Recognized in Net Interest Income	(124,246)	(180,258)	(413,669)	(450,975)
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) on Derivative	298,007	53,846	344,215	66,758
Gains/(Losses) on Hedged Item	(298,041)	(54,243)	(343,370)	(67,189)
Net Interest Settlements on FV Hedges	(124,212)	(179,861)	(414,514)	(450,544)
Gain (Loss) on Fair Value Hedges Recognized in Net Interest Income	(124,246)	(180,258)	(413,669)	(450,975)
Interest Expense [Member] | Consolidated Obligations Discount Notes
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gains/(Losses) on Derivative	1,841	4,507	823	3,573
Gains/(Losses) on Hedged Item	(1,638)	(2,215)	(1,079)	(5,584)
Net Interest Settlements on FV Hedges	(995)	(4,712)	(3,723)	(6,778)
Gain (Loss) on Fair Value Hedges Recognized in Net Interest Income	(792)	(2,420)	(3,979)	(8,789)
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) on Derivative	1,841	4,507	823	3,573
Gains/(Losses) on Hedged Item	(1,638)	(2,215)	(1,079)	(5,584)
Net Interest Settlements on FV Hedges	(995)	(4,712)	(3,723)	(6,778)
Gain (Loss) on Fair Value Hedges Recognized in Net Interest Income	$ (792)	$ (2,420)	$ (3,979)	$ (8,789)

Fair Value Measures and Disclos

Fair Value Measures and Disclosures (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Advances [Member]
Derivative [Line Items]
Hedged Asset, Fair Value Hedge	[1]	$ 15,192,060	$ 17,280,826
Hedged Asset, Active Fair Value Hedge, Cumulative Increase (Decrease)		(30,916)	(214,538)
Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease)		(378)	(615)
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease)		(31,294)	(215,153)
Available-for-sale Securities
Derivative [Line Items]
Hedged Asset, Fair Value Hedge	[1]	8,626,329	7,258,326
Hedged Asset, Active Fair Value Hedge, Cumulative Increase (Decrease)		(162,654)	(324,211)
Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease)		624	730
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease)		(162,030)	(323,481)
Consolidated Obligations Bonds [Member]
Derivative [Line Items]
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)		(275,549)	(618,920)
Hedged Liability, Discontinued Fair Value Hedge, Cumulative Increase (Decrease)		0	0
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)		(275,549)	(618,920)
Hedged Liability, Fair Value Hedge	[1]	25,321,040	51,362,338
Consolidated Obligations Discount Notes
Derivative [Line Items]
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)		706	(373)
Hedged Liability, Discontinued Fair Value Hedge, Cumulative Increase (Decrease)		0	0
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)		706	(373)
Hedged Liability, Fair Value Hedge		$ 1,247,389	$ 3,749,121
[1] Includes carrying value of hedged items in current fair value hedging relationships. Carrying value includes fair value hedging adjustments.

Derivatives and Hedging Activ_4

Derivatives and Hedging Activities (Derivatives in Statement of Income) (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]
Net gains (losses) related to derivatives not designated as hedging instruments	$ (17,965)		$ 7,270	$ (10,618)		$ 21,216
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) related to derivatives not designated as hedging instruments	(18,319)		5,913	(13,140)		19,717
Interest Rate Caps or Floors [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) related to derivatives not designated as hedging instruments	(1,829)		(1,273)	(2,910)		(2,230)
Net Interest Settlements [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) related to derivatives not designated as hedging instruments	3,888		3,941	9,494		5,850
Derivatives Not Designated As Hedging Before Price Alignment
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) related to derivatives not designated as hedging instruments	(17,851)		7,850	(9,352)		22,482
Price Alignment Amount
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) related to derivatives not designated as hedging instruments	(114)	[1]	(580)	(1,266)	[1]	(1,266)
Mortgage Receivable [Member] | Forward Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) related to derivatives not designated as hedging instruments	$ (1,591)		$ (731)	$ (2,797)		$ (856)
[1] This amount is for derivatives for which variation margin is characterized as a daily settled contract.

Derivatives and Hedging Activ_5

Derivatives and Hedging Activities (Offsetting Assets) (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Offsetting Assets [Line Items]
Derivative Asset, Fair Value, Gross Asset		$ 104,911	$ 206,460
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	[1],[2]	304,967	201,892
Derivative Asset, Net Fair Value Amount, After Offsetting Adjustment		409,878	408,352
Derivative Asset, Not Subject to Master Netting Arrangement		0	155	[3]
Derivative assets		409,878	408,507
Derivative Liability, Fair Value, Gross Liability		358,233	650,647
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	[2]	(346,538)	(643,339)	[1]
Derivative Laibility, Net Fair Value Amount, After Offsetting Adjustment		11,695	7,308
Derivative Liability, Not Subject to Master Netting Arrangement		392	26	[3]
Derivative liabilities (Note 5)		12,087	7,334
Over the Counter [Member]
Offsetting Assets [Line Items]
Derivative Asset, Fair Value, Gross Asset		64,095	201,762
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset		(63,739)	(201,356)
Derivative Asset, Net Fair Value Amount, After Offsetting Adjustment		356	406
Derivative Asset, Not Subject to Master Netting Arrangement		0	155	[3]
Derivative assets		356	561
Derivative Liability, Fair Value, Gross Liability		354,945	644,826
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset		(343,250)	(637,518)
Derivative Laibility, Net Fair Value Amount, After Offsetting Adjustment		11,695	7,308
Derivative Liability, Not Subject to Master Netting Arrangement		392	26	[3]
Derivative liabilities (Note 5)		12,087	7,334
Exchange Cleared [Member]
Offsetting Assets [Line Items]
Derivative Asset, Fair Value, Gross Asset		40,816	4,698
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset		368,706	403,248
Derivative Asset, Net Fair Value Amount, After Offsetting Adjustment		409,522	407,946
Derivative Asset, Not Subject to Master Netting Arrangement		0	0	[3]
Derivative assets		409,522	407,946
Derivative Liability, Fair Value, Gross Liability		3,288	5,821
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset		(3,288)	(5,821)
Derivative Laibility, Net Fair Value Amount, After Offsetting Adjustment		0	0
Derivative Liability, Not Subject to Master Netting Arrangement		0	0	[3]
Derivative liabilities (Note 5)		$ 0	$ 0
[1] Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions and also cash collateral held and related interest accrued or placed by the Bank with the same clearing agent and/or counterparties. Represents derivatives that are not subject to an enforceable netting agreement (e.g., mortgage delivery commitments).

Derivatives and Hedging Activ_6

Derivatives and Hedging Activities (Offsetting Liabilities) (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Offsetting Liabilities [Line Items]
Derivative Liability, Fair Value, Gross Liability		$ 358,233	$ 650,647
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	[1]	(346,538)	(643,339)	[2]
Derivative Laibility, Net Fair Value Amount, After Offsetting Adjustment		11,695	7,308
Derivative Liability, Not Subject to Master Netting Arrangement		392	26	[3]
Derivative liabilities		12,087	7,334
Over the Counter [Member]
Offsetting Liabilities [Line Items]
Derivative Liability, Fair Value, Gross Liability		354,945	644,826
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset		(343,250)	(637,518)
Derivative Laibility, Net Fair Value Amount, After Offsetting Adjustment		11,695	7,308
Derivative Liability, Not Subject to Master Netting Arrangement		392	26	[3]
Derivative liabilities		12,087	7,334
Exchange Cleared [Member]
Offsetting Liabilities [Line Items]
Derivative Liability, Fair Value, Gross Liability		3,288	5,821
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset		(3,288)	(5,821)
Derivative Laibility, Net Fair Value Amount, After Offsetting Adjustment		0	0
Derivative Liability, Not Subject to Master Netting Arrangement		0	0	[3]
Derivative liabilities		$ 0	$ 0
[1]Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions, cash collateral including accrued interest held or placed with the same clearing agent and/or counterparties. Cash collateral posted including accrued interest was $661.7 million for September 30, 2024 and $854.6 million for December 31, 2023. Cash collateral received was $10.2 million for September 30, 2024 and $9.4 million for December 31, 2023[2] Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions and also cash collateral held and related interest accrued or placed by the Bank with the same clearing agent and/or counterparties. Represents derivatives that are not subject to an enforceable netting agreement (e.g., mortgage delivery commitments).

Schedule of Long-term Debt by C

Schedule of Long-term Debt by Call Feature (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Schedule of Short-term and Long-term Debt [Line Items]
Par amounts for the FHLBanks' outstanding Consolidated Obligation	$ 1,172,800,000	$ 1,204,300,000
Bond premiums	23,196	34,145
Bond discounts	(9,534)	(13,419)
Concession fees	(6,511)	(6,484)
Fair value hedging adjustments	(275,549)	(618,920)
Total book value	98,528,817	90,801,032
Long-term Debt, Gross	98,797,215	91,405,710
Fixed Interest Rate [Member]
Schedule of Short-term and Long-term Debt [Line Items]
Long-term Debt, Gross	33,728,315	60,032,810
Step-up Interest Rate [Member] [Member]
Schedule of Short-term and Long-term Debt [Line Items]
Long-term Debt, Gross	1,590,000	2,034,000
Variable interest rate [Member]
Schedule of Short-term and Long-term Debt [Line Items]
Long-term Debt, Gross	$ 63,478,900	$ 29,338,900

Consolidated Obligations (Contr

Consolidated Obligations (Contractual Maturity Terms) (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Schedule of Short-term and Long-term Debt [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Rolling Twelve Months	$ 79,045,455	$ 62,578,585
Long Debt, Maturities, Repayments of Principal in Next Twelve Months, Weighted Average Interest Rate	4.72%	4.89%
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Two	$ 8,013,900	$ 13,255,965
Long-term Debt, Maturities, Repayments of Principal in Year Two, Weighted Average Interest Rate	2.67%	4.63%
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Three	$ 4,409,200	$ 8,010,800
Long-term Debt, Maturities, Repayments of Principal in Year Three, Weighted Average Interest Rate	2.56%	1.94%
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Four	$ 2,418,250	$ 2,178,600
Long-term Debt, Maturities, Repayments of Principal in Year Four, Weighted Average Interest Rate	3.64%	3.30%
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Five	$ 1,768,410	$ 2,262,125
Long-term Debt, Maturities, Repayments of Principal in Year Five, Weighted Average Interest Rate	4.25%	3.59%
Long-term Debt, Maturities, Repayments of Principal in Rolling after Year Five	$ 3,142,000	$ 3,119,635
Long-term Debt, Maturities, Repayments of Principal After Year Five, Weighted Average Interest Rate	3.05%	2.87%
Long-term Debt, Gross	$ 98,797,215	$ 91,405,710
Long-term Debt, Weighted Average Interest Rate, at Point in Time	4.37%	4.46%

Consolidated Obligations (Conso

Consolidated Obligations (Consolidated Obligation Bonds Noncallable and Callable) (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Schedule of Short-term and Long-term Debt [Line Items]
Long-term Debt, Gross	$ 98,797,215	$ 91,405,710
Non Callable [Member]
Schedule of Short-term and Long-term Debt [Line Items]
Long-term Debt, Gross	71,758,715	51,242,210
Callable [Member]
Schedule of Short-term and Long-term Debt [Line Items]
Long-term Debt, Gross	$ 27,038,500	$ 40,163,500

Consolidated Obligations (Con_2

Consolidated Obligations (Consolidated Obligation Bonds by Earlier of Contractual Maturity or Next Call Date) (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Schedule of Short-term and Long-term Debt [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Rolling Twelve Months	$ 79,045,455	$ 62,578,585
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Two	8,013,900	13,255,965
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Three	4,409,200	8,010,800
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Four	2,418,250	2,178,600
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Five	1,768,410	2,262,125
Long-term Debt, Maturities, Repayments of Principal in Rolling after Year Five	3,142,000	3,119,635
Long-term Debt, Gross	98,797,215	91,405,710
Earlier of Contractual Maturity or Next Call Date [Member] [Member]
Schedule of Short-term and Long-term Debt [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Rolling Twelve Months	90,664,955	75,974,085
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Two	4,179,400	10,202,465
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Three	1,090,200	2,122,800
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Four	1,557,250	650,600
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Five	534,410	1,552,125
Long-term Debt, Maturities, Repayments of Principal in Rolling after Year Five	$ 771,000	$ 903,635

Consolidated Obligations (Con_3

Consolidated Obligations (Consolidated Obligation Discount Notes) (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Short-term Debt [Line Items]
Discount Notes, Book value		$ 9,776,014	$ 13,683,580
Discount Notes, Weighted Average Interest Rate	[1]	5%	5.36%
Short-term Debt [Member]
Short-term Debt [Line Items]
Debt Instrument, Face Amount		$ 9,810,114	$ 13,806,118
[1]Represents yield to maturity excluding concession fees and hedging adjustments.

Capital (Capital Requirements)

Capital (Capital Requirements) (Details) $ in Thousands	Sep. 30, 2024 USD ($) numberOfRegulatoryRequirements	Dec. 31, 2023 USD ($)
Banking Regulation, Total Capital [Abstract]
Number of Finance Agency Regulatory Capital Requirements | numberOfRegulatoryRequirements	3
Number Of Subclasses Of Capital Stock	2
Risk-Based Capital, Required	$ 901,689	$ 748,268
Risk-Based Capital, Actual	$ 5,994,096	$ 5,780,099
Total capital-to-asset ratio, Required	4%	4%
Total capital-to-asset ratio, Actual	5.20%	5.20%
Total regulatory capital, Required	$ 4,638,575	$ 4,485,906
Total regulatory capital, Actual	$ 5,994,096	$ 5,780,099
Leverage ratio - Required	5%	5%
Leverage ratio, Actual	7.80%	7.70%
Leverage capital, Required	$ 5,798,218	$ 5,607,382
Leverage capital, Actual	$ 8,991,144	$ 8,670,149

Capital (Mandatorily Redeemable

Capital (Mandatorily Redeemable Capital Stock) (Details) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024 USD ($) Institutions $ / shares	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) Institutions $ / shares	Sep. 30, 2023 USD ($)	Dec. 31, 2023 $ / shares
Banking Regulation, Total Capital [Abstract]
Interest Expense, Capital Securities	$ 600	$ 600	$ 1,800	$ 1,700
Balance, beginning of the period			27,874	27,763
Capital stock subject to mandatory redemption reclassified from capital		5,885	5,820	13,681
Redemption/repurchase of mandatorily redeemable capital stock			(6,140)	(13,448)
Balance, end of the period	$ 27,554	$ 27,996	$ 27,554	$ 27,996
Capital stock, Par value Per Share | $ / shares	$ 100		$ 100		$ 100
Financial Instruments Subject to Mandatory Redemption, Number of Institutions | Institutions	9		9
Financial Instruments Subject to Mandatory Redemption, Due to Institution Mergers | Institutions	5		5
Financial instruments subject to mandatory redemption, due to relocation | Institutions	1		1
Financial Instruments Subject to Mandatory Redemption, Number of Institutions, Voluntary Withdrawls | Institutions	3		3

Capital (Mandatorily Redeemab_2

Capital (Mandatorily Redeemable Capital Stock by Contractual Year of Redemption) (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022
Banking Regulation, Total Capital [Abstract]
Due in 1 year or less	$ 43	$ 0
Due after 1 year through 2 years	450	40
Due after 2 years through 3 years	4,262	486
Due after 3 years through 4 years	1,108	4,728
Due after 4 years through 5 years	400	1,181
Financial Instruments Subject to Mandatory Redemption, Past Contractual Redemption Date, Due to Outstanding Activity	21,291	21,439
Total	$ 27,554	$ 27,874	$ 27,996	$ 27,763

Capital (Dividends and Retained

Capital (Dividends and Retained Earnings) (Details) - USD ($)								9 Months Ended
	Oct. 25, 2024	Jul. 26, 2024	Apr. 26, 2024	Feb. 23, 2024	Jul. 28, 2023	Apr. 28, 2023	Feb. 24, 2023	Sep. 30, 2024	Dec. 31, 2023
Capital [Line Items]
Joint Capital Enhancement Agreement Percentage								20%
Percent of Average Balance of Outstanding Consolidated Obligations Required per the Joint Capital Enhancement Agreement For Each Previous Quarter								1%
Retained Earnings, Restricted, Percent								150%
Unrestricted								$ 1,331,263,000	$ 1,216,323,000
Restricted								702,900,000	615,373,000
Retained Earnings (Accumulated Deficit)								2,034,163,000	1,831,696,000
Subclass B1 [Member]
Capital [Line Items]
Common Stock, Value, Outstanding								333,000,000	315,700,000
Dividends Cash, Annualized Rate		5.60%	5.60%	5.35%	5.25%	5%	4%
Subclass B1 [Member] | Subsequent Event [Member]
Capital [Line Items]
Dividends Cash, Annualized Rate	5.60%
Subclass B2 [Member]
Capital [Line Items]
Common Stock, Value, Outstanding								$ 3,599,400,000	$ 3,604,800,000
Dividends Cash, Annualized Rate		9%	8.75%	8.50%	7.95%	7.95%	7.95%
Subclass B2 [Member] | Subsequent Event [Member]
Capital [Line Items]
Dividends Cash, Annualized Rate	9%

Capital (Accumulated Other Comp

Capital (Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023	Dec. 31, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI balance	$ 5,961,499	$ 5,505,967	$ 5,961,499	$ 5,505,967	$ 5,611,431	$ 5,679,738	$ 5,640,907	$ 4,898,115
Net unrealized gains (losses) on AFS securities	30,517	(65,343)	69,307	(48,659)
Net Unrealized Gains(Losses)
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI balance	(3,555)	(115,065)	(3,555)	(115,065)	(34,072)	(72,862)	(49,722)	(65,917)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	0	0	0	(489)
Pension and Post Retirement Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI balance	(1,489)	(635)	(1,489)	(635)	(1,519)	374	(627)	(610)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent	30	(8)	(1,863)	(25)
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI balance	(5,044)	(115,700)	(5,044)	(115,700)	$ (35,591)	$ (72,488)	$ (50,349)	$ (66,527)
Net unrealized gains (losses)	30,517	(65,343)	69,307	(48,659)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent	$ 30	$ (8)	$ (1,863)	(25)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax				$ 489

Transactions with Related Par_3

Transactions with Related Parties (By Balance Sheet Grouping) (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Related Party Transaction [Line Items]
Advances		$ 79,265,375	$ 78,431,508
Deposits		704,863	636,726
Capital stock		3,932,380	3,920,530
Principal Owner [Member]
Related Party Transaction [Line Items]
Advances		53,712,016	45,435,931
Letters of credit	[1]	20,190,928	20,225,736
MPF loans		287,805	202,529
Deposits		25,971	40,129
Capital stock		$ 2,407,520	$ 2,038,033
[1] (2) Letters of credit are off-balance sheet commitments.

Transactions with Related Par_4

Transactions with Related Parties (Statement of Income Effects) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Related Party Transaction [Line Items]
Interest income on advances (1)	$ 1,058,730	$ 1,071,029	$ 3,147,401	$ 3,120,857
Interest Income on MPF loans	42,555	37,516	124,967	108,824
Letters of credit fees	8,823	8,133	25,750	22,173
Principal Owner [Member]
Related Party Transaction [Line Items]
Interest income on advances (1)	707,827	601,408	2,006,556	1,824,881
Interest Income on MPF loans	3,147	2,628	7,795	8,216
Letters of credit fees	$ 6,112	$ 8,067	$ 17,946	$ 19,127

Transactions with Related Par_5

Transactions with Related Parties (Transactions with Other FHLBanks) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Related Party Transaction [Line Items]
Loans Repaid by Other Federal Home Loan Banks	$ 0	$ 0		$ 750,000
Loans from Other Federal Home Loan Banks	0	0	$ 0	0
FHLBank of Chicago [Member]
Related Party Transaction [Line Items]
Servicing fee expense	987	$ 952	2,944	$ 2,833
Interest-bearing deposits maintained with FHLBank of Chicago	$ 5,616		$ 5,616		$ 6,075

Estimated Fair Values (Carrying

Estimated Fair Values (Carrying Value and Fair Value of Financial Instruments) (Details) - USD ($)		Sep. 30, 2024		Dec. 31, 2023		Sep. 30, 2023	Dec. 31, 2022
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks		$ 17,391,000		$ 11,509,000
Interest-bearing deposits		3,115,630,000		3,110,803,000
Securities Purchased under Agreements to Resell, Fair Value Disclosure		4,780,000,000		5,980,000,000
Federal funds sold		3,542,000,000		2,533,000,000
Trading securities		156,729,000		217,722,000
Fair Value		17,904,881,000		14,822,933,000
HTM securities; fair value of $1,333,194 and $1,272,746		1,384,587,000		1,339,759,000
Advances		79,265,375,000		78,431,508,000
Accrued interest receivable		538,812,000		517,361,000
Derivative assets		409,878,000		408,507,000
Deposits		704,863,000		636,726,000
Mandatorily redeemable capital stock (Note 7)		27,554,000		27,874,000
Accrued interest payable		625,184,000		753,663,000
Derivative liabilities		12,087,000		7,334,000
Cash and due from banks		17,391,000		11,509,000
Fair Value		17,904,881,000		14,822,933,000
HTM securities; fair value of $1,333,194 and $1,272,746	[1]	1,384,587,000		1,339,759,000
HTM securities		1,333,194,000		1,272,746,000
Accrued interest receivable		538,812,000		517,361,000
Derivative assets		409,878,000		408,507,000
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	[2],[3]	304,967,000		201,892,000
Mandatorily redeemable capital stock (Note 7)		27,554,000		27,874,000		$ 27,996,000	$ 27,763,000
Accrued interest payable		625,184,000		753,663,000
Derivative liabilities		12,087,000		7,334,000
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	[3]	(346,538,000)		(643,339,000)	[2]
GSE obligations
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities		156,729,000		217,722,000
Fair Value		938,989,000		983,307,000
U.S. Treasury obligations
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value		4,172,234,000		3,676,037,000
State or local agency obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value		174,301,000		174,111,000
Single Family, Mortgage-backed Securities, Other US Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value		1,894,417,000		1,538,389,000
HTM securities; fair value of $1,333,194 and $1,272,746		700,682,000	[1]	608,937,000
HTM securities		701,830,000		608,537,000
GSE MBS [Member] | Multifamily [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value		6,515,348,000		6,277,529,000
HTM securities; fair value of $1,333,194 and $1,272,746		244,348,000	[1]	245,545,000
HTM securities		242,136,000		238,815,000
GSE MBS [Member] | Single Family [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value		4,090,237,000		2,047,752,000
HTM securities; fair value of $1,333,194 and $1,272,746		400,836,000	[1]	440,752,000
HTM securities		352,156,000		383,738,000
Private label MBS [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value		119,355,000		125,808,000
HTM securities; fair value of $1,333,194 and $1,272,746		38,721,000	[1]	44,525,000
HTM securities		37,072,000		41,656,000
Fair Value, Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset		304,967,000		201,892,000
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset		(346,538,000)	[2]	(643,339,000)
Interest Rate Swap [Member] | Fair Value, Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset		304,967,000		201,892,000
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset		(346,538,000)		(643,339,000)
Forward Contracts [Member] | Fair Value, Recurring [Member] | Mortgage Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset		0		0
Estimate of Fair Value, Fair Value Disclosure
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks		17,391,000		11,509,000
Interest-bearing deposits		3,115,630,000		3,110,803,000
Securities Purchased under Agreements to Resell, Fair Value Disclosure	[4]	4,780,006,000		5,979,957,000
Federal funds sold		3,542,003,000		2,532,983,000
Trading securities		156,729,000		217,722,000
Fair Value		17,904,881,000		14,822,933,000
HTM securities		1,333,194,000		1,272,746,000
Advances		79,277,746,000		78,364,403,000
Accrued interest receivable		538,812,000		517,361,000
Derivative assets		409,878,000		408,507,000
Deposits		704,863,000		636,726,000
Mandatorily redeemable capital stock (Note 7)	[5]	28,175,000		28,468,000
Accrued interest payable	[5]	624,563,000		753,069,000
Derivative liabilities		12,087,000		7,334,000
Estimate of Fair Value, Fair Value Disclosure | Fair Value, Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities		156,729,000		217,722,000
AFS Securities		17,904,881,000		14,822,933,000
Derivative assets		409,878,000		408,507,000
Derivative liabilities		12,087,000		7,334,000
Total assets at fair value		18,471,488,000		15,449,162,000
Estimate of Fair Value, Fair Value Disclosure | Fair Value, Recurring [Member] | GSE obligations
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities		156,729,000		217,722,000
AFS Securities		938,989,000		983,307,000
Estimate of Fair Value, Fair Value Disclosure | Fair Value, Recurring [Member] | U.S. Treasury obligations
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
AFS Securities		4,172,234,000		3,676,037,000
Estimate of Fair Value, Fair Value Disclosure | Fair Value, Recurring [Member] | State or local agency obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
AFS Securities		174,301,000		174,111,000
Estimate of Fair Value, Fair Value Disclosure | Fair Value, Recurring [Member] | Single Family, Mortgage-backed Securities, Other US Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
AFS Securities		1,894,417,000		1,538,389,000
Estimate of Fair Value, Fair Value Disclosure | Fair Value, Recurring [Member] | GSE MBS [Member] | Multifamily [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
AFS Securities		6,515,348,000		6,277,529,000
Estimate of Fair Value, Fair Value Disclosure | Fair Value, Recurring [Member] | GSE MBS [Member] | Single Family [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
AFS Securities		4,090,237,000		2,047,752,000
Estimate of Fair Value, Fair Value Disclosure | Fair Value, Recurring [Member] | Private label MBS [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
AFS Securities		119,355,000		125,808,000
Estimate of Fair Value, Fair Value Disclosure | Fair Value, Nonrecurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
MPF & BOB Loans , Net of Allowance		6,168,000		6,859,000
REO - FV		312,000		290,000
Total assets at fair value		6,480,000		7,149,000
Estimate of Fair Value, Fair Value Disclosure | Interest Rate Swap [Member] | Fair Value, Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets		409,878,000		408,352,000
Derivative liabilities		11,695,000		7,308,000
Estimate of Fair Value, Fair Value Disclosure | Forward Contracts [Member] | Fair Value, Recurring [Member] | Mortgage Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets				155,000
Derivative liabilities		392,000		26,000
Consolidated Obligations, Discount Notes | Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discount notes		9,776,014,000		13,683,580,000
Consolidated Obligations, Discount Notes | Estimate of Fair Value, Fair Value Disclosure
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discount notes		9,776,381,000		13,678,683,000
Consolidated Obligation Bonds | Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Bonds		98,528,817,000		90,801,032,000
Consolidated Obligation Bonds | Estimate of Fair Value, Fair Value Disclosure
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Bonds		98,063,403,000		90,267,686,000
Mortgage loans held for portfolio, net | Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
MPF & BOB Loans , Net of Allowance		4,746,742,000		4,697,752,000
Mortgage loans held for portfolio, net | Estimate of Fair Value, Fair Value Disclosure
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
MPF & BOB Loans , Net of Allowance		4,312,900,000		4,236,537,000
Fair Value, Inputs, Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks		17,391,000		11,509,000
Interest-bearing deposits		3,115,630,000		3,110,803,000
Securities Purchased under Agreements to Resell, Fair Value Disclosure		0	[4]	0
Federal funds sold		0		0
Trading securities		0		0
Fair Value		0		0
HTM securities		0		0
Advances		0		0
Accrued interest receivable		0		0
Derivative assets		0		0
Deposits		0		0
Mandatorily redeemable capital stock (Note 7)		28,175,000		28,468,000
Accrued interest payable		0		0
Derivative liabilities		0		0
Fair Value, Inputs, Level 1 | Fair Value, Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities		0		0
AFS Securities		0		0
Derivative assets		0		0
Derivative liabilities		0
Total assets at fair value		0		0
Fair Value, Inputs, Level 1 | Fair Value, Recurring [Member] | GSE obligations
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities		0		0
AFS Securities		0		0
Fair Value, Inputs, Level 1 | Fair Value, Recurring [Member] | State or local agency obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
AFS Securities		0
Fair Value				0
Fair Value, Inputs, Level 1 | Fair Value, Recurring [Member] | Single Family, Mortgage-backed Securities, Other US Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
AFS Securities		0
Fair Value				0
Fair Value, Inputs, Level 1 | Fair Value, Recurring [Member] | GSE MBS [Member] | Multifamily [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
AFS Securities		0
Fair Value				0
Fair Value, Inputs, Level 1 | Fair Value, Recurring [Member] | GSE MBS [Member] | Single Family [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
AFS Securities		0
Fair Value				0
Fair Value, Inputs, Level 1 | Fair Value, Recurring [Member] | Private label MBS [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
AFS Securities		0
Fair Value				0
Fair Value, Inputs, Level 1 | Interest Rate Swap [Member] | Fair Value, Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets		0		0
Derivative liabilities				0
Fair Value, Inputs, Level 1 | Forward Contracts [Member] | Fair Value, Recurring [Member] | Mortgage Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets				0
Derivative liabilities		0
Fair Value, Inputs, Level 1 | Consolidated Obligations, Discount Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discount notes		0		0
Fair Value, Inputs, Level 1 | Consolidated Obligation Bonds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Bonds		0		0
Fair Value, Inputs, Level 1 | Mortgage loans held for portfolio, net
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
MPF & BOB Loans , Net of Allowance		0		0
Fair Value, Inputs, Level 2
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, Fair Value Disclosure	[4]	4,780,006,000		5,979,957,000
Federal funds sold		3,542,003,000		2,532,983,000
Trading securities		156,729,000		217,722,000
Fair Value		17,785,526,000		14,697,125,000
HTM securities		1,296,122,000		1,231,090,000
Advances		79,277,746,000		78,364,403,000
Accrued interest receivable		538,812,000		517,361,000
Derivative assets		104,911,000		206,615,000
Deposits		704,863,000		636,726,000
Mandatorily redeemable capital stock (Note 7)		0		0
Accrued interest payable		624,563,000		753,069,000
Derivative liabilities		358,625,000		650,673,000
Fair Value, Inputs, Level 2 | Fair Value, Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities		156,729,000		217,722,000
AFS Securities		17,785,526,000		14,697,125,000
Derivative assets		104,911,000		206,615,000
Derivative liabilities		358,625,000		650,673,000
Total assets at fair value		18,047,166,000		15,121,462,000
Fair Value, Inputs, Level 2 | Fair Value, Recurring [Member] | GSE obligations
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities		156,729,000		217,722,000
AFS Securities		938,989,000		983,307,000
Fair Value, Inputs, Level 2 | Fair Value, Recurring [Member] | U.S. Treasury obligations
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
AFS Securities		4,172,234,000		3,676,037,000
Fair Value, Inputs, Level 2 | Fair Value, Recurring [Member] | State or local agency obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
AFS Securities		174,301,000
Fair Value				174,111,000
Fair Value, Inputs, Level 2 | Fair Value, Recurring [Member] | Single Family, Mortgage-backed Securities, Other US Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
AFS Securities		1,894,417,000
Fair Value				1,538,389,000
Fair Value, Inputs, Level 2 | Fair Value, Recurring [Member] | GSE MBS [Member] | Multifamily [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
AFS Securities		6,515,348,000
Fair Value				6,277,529,000
Fair Value, Inputs, Level 2 | Fair Value, Recurring [Member] | GSE MBS [Member] | Single Family [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
AFS Securities		4,090,237,000
Fair Value				2,047,752,000
Fair Value, Inputs, Level 2 | Fair Value, Recurring [Member] | Private label MBS [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
AFS Securities		0
Fair Value				0
Fair Value, Inputs, Level 2 | Interest Rate Swap [Member] | Fair Value, Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets		104,911,000		206,460,000
Derivative liabilities		358,233,000		650,647,000
Fair Value, Inputs, Level 2 | Forward Contracts [Member] | Fair Value, Recurring [Member] | Mortgage Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets				155,000
Derivative liabilities		392,000		26,000
Fair Value, Inputs, Level 2 | Consolidated Obligations, Discount Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discount notes		9,776,381,000		13,678,683,000
Fair Value, Inputs, Level 2 | Consolidated Obligation Bonds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Bonds		98,063,403,000		90,267,686,000
Fair Value, Inputs, Level 2 | Mortgage loans held for portfolio, net
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
MPF & BOB Loans , Net of Allowance		4,312,900,000		4,236,537,000
Fair Value, Inputs, Level 3
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, Fair Value Disclosure	[4]	0		0
Federal funds sold		0		0
Trading securities		0		0
Fair Value		119,355,000		125,808,000
HTM securities		37,072,000		41,656,000
Advances		0		0
Accrued interest receivable		0		0
Derivative assets		0		0
Deposits		0		0
Mandatorily redeemable capital stock (Note 7)		0		0
Accrued interest payable		0		0
Derivative liabilities		0		0
Fair Value, Inputs, Level 3 | Fair Value, Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities		0		0
AFS Securities		119,355,000		125,808,000
Derivative assets		0		0
Derivative liabilities		0		0
Total assets at fair value		119,355,000		125,808,000
Fair Value, Inputs, Level 3 | Fair Value, Recurring [Member] | GSE obligations
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities		0		0
AFS Securities		0		0
Fair Value, Inputs, Level 3 | Fair Value, Recurring [Member] | State or local agency obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
AFS Securities		0
Fair Value				0
Fair Value, Inputs, Level 3 | Fair Value, Recurring [Member] | Single Family, Mortgage-backed Securities, Other US Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
AFS Securities		0
Fair Value				0
Fair Value, Inputs, Level 3 | Fair Value, Recurring [Member] | GSE MBS [Member] | Multifamily [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
AFS Securities		0
Fair Value				0
Fair Value, Inputs, Level 3 | Fair Value, Recurring [Member] | GSE MBS [Member] | Single Family [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
AFS Securities		0
Fair Value, Inputs, Level 3 | Fair Value, Recurring [Member] | Private label MBS [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
AFS Securities		119,355,000
Fair Value				125,808,000
Fair Value, Inputs, Level 3 | Fair Value, Nonrecurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
MPF & BOB Loans , Net of Allowance		6,168,000		6,859,000
REO - FV		312,000		290,000
Total assets at fair value		6,480,000		7,149,000
Fair Value, Inputs, Level 3 | Interest Rate Swap [Member] | Fair Value, Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets		0		0
Derivative liabilities				0
Fair Value, Inputs, Level 3 | Forward Contracts [Member] | Fair Value, Recurring [Member] | Mortgage Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets				0
Derivative liabilities		0
Fair Value, Inputs, Level 3 | Consolidated Obligations, Discount Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discount notes		0		0
Fair Value, Inputs, Level 3 | Consolidated Obligation Bonds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Bonds		0		0
Fair Value, Inputs, Level 3 | Mortgage loans held for portfolio, net
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
MPF & BOB Loans , Net of Allowance		$ 0		$ 0
[1] Includes adjustments made to the cost basis of an investment for accretion and amortization and excludes accrued interest receivable Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions and also cash collateral held and related interest accrued or placed by the Bank with the same clearing agent and/or counterparties. Based on the fair value of the related collateral held, the securities purchased under agreements to resell were fully collateralized for the periods presented. There were no offsetting liabilities related to these securities at September 30, 2024 and December 31, 2023. These instruments’ maturity term is overnight.

Estimated Fair Values (Fair Val

Estimated Fair Values (Fair Value Measured on Recurring and Nonrecurring Basis) (Details) - USD ($)		Sep. 30, 2024		Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		$ 409,878,000		$ 408,507,000
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	[1],[2]	304,967,000		201,892,000
Derivative liabilities		12,087,000		7,334,000
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	[2]	(346,538,000)		(643,339,000)	[1]
Fair Value		17,904,881,000		14,822,933,000
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0		0
Derivative assets		0		0
Derivative liabilities		0		0
Fair Value		0		0
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		156,729,000		217,722,000
Derivative assets		104,911,000		206,615,000
Derivative liabilities		358,625,000		650,673,000
Fair Value		17,785,526,000		14,697,125,000
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0		0
Derivative assets		0		0
Derivative liabilities		0		0
Fair Value		119,355,000		125,808,000
Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset		304,967,000		201,892,000
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset		(346,538,000)	[1]	(643,339,000)
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0		0
AFS Securities		0		0
Derivative assets		0		0
Derivative liabilities		0
Total assets at fair value		0		0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		156,729,000		217,722,000
AFS Securities		17,785,526,000		14,697,125,000
Derivative assets		104,911,000		206,615,000
Derivative liabilities		358,625,000		650,673,000
Total assets at fair value		18,047,166,000		15,121,462,000
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0		0
AFS Securities		119,355,000		125,808,000
Derivative assets		0		0
Derivative liabilities		0		0
Total assets at fair value		119,355,000		125,808,000
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for portfolio		6,168,000		6,859,000
REO - FV		312,000		290,000
Total assets at fair value		6,480,000		7,149,000
Interest Rate Swap [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset		304,967,000		201,892,000
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset		(346,538,000)		(643,339,000)
Interest Rate Swap [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0		0
Derivative liabilities				0
Interest Rate Swap [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		104,911,000		206,460,000
Derivative liabilities		358,233,000		650,647,000
Interest Rate Swap [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0		0
Derivative liabilities				0
U.S. Treasury obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		4,172,234,000		3,676,037,000
U.S. Treasury obligations | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS Securities		4,172,234,000		3,676,037,000
GSE obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		156,729,000		217,722,000
Fair Value		938,989,000		983,307,000
GSE obligations | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0		0
AFS Securities		0		0
GSE obligations | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		156,729,000		217,722,000
AFS Securities		938,989,000		983,307,000
GSE obligations | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0		0
AFS Securities		0		0
State or local agency obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		174,301,000		174,111,000
State or local agency obligations [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS Securities		0
Fair Value				0
State or local agency obligations [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS Securities		174,301,000
Fair Value				174,111,000
State or local agency obligations [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS Securities		0
Fair Value				0
U.S. obligations single-family
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		1,894,417,000		1,538,389,000
U.S. obligations single-family | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS Securities		0
Fair Value				0
U.S. obligations single-family | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS Securities		1,894,417,000
Fair Value				1,538,389,000
U.S. obligations single-family | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS Securities		0
Fair Value				0
Private label MBS [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		119,355,000		125,808,000
Private label MBS [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS Securities		0
Fair Value				0
Private label MBS [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS Securities		0
Fair Value				0
Private label MBS [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS Securities		119,355,000
Fair Value				125,808,000
Mortgage Receivable [Member] | Forward Contracts [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset		0		0
Mortgage Receivable [Member] | Forward Contracts [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets				0
Derivative liabilities		0
Mortgage Receivable [Member] | Forward Contracts [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets				155,000
Derivative liabilities		392,000		26,000
Mortgage Receivable [Member] | Forward Contracts [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets				0
Derivative liabilities		0
Estimate of Fair Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		156,729,000		217,722,000
Derivative assets		409,878,000		408,507,000
Derivative liabilities		12,087,000		7,334,000
Fair Value		17,904,881,000		14,822,933,000
Estimate of Fair Value Measurement [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		156,729,000		217,722,000
AFS Securities		17,904,881,000		14,822,933,000
Derivative assets		409,878,000		408,507,000
Derivative liabilities		12,087,000		7,334,000
Total assets at fair value		18,471,488,000		15,449,162,000
Estimate of Fair Value Measurement [Member] | Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for portfolio		6,168,000		6,859,000
REO - FV		312,000		290,000
Total assets at fair value		6,480,000		7,149,000
Estimate of Fair Value Measurement [Member] | Interest Rate Swap [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		409,878,000		408,352,000
Derivative liabilities		11,695,000		7,308,000
Estimate of Fair Value Measurement [Member] | U.S. Treasury obligations | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS Securities		4,172,234,000		3,676,037,000
Estimate of Fair Value Measurement [Member] | GSE obligations | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		156,729,000		217,722,000
AFS Securities		938,989,000		983,307,000
Estimate of Fair Value Measurement [Member] | State or local agency obligations [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS Securities		174,301,000		174,111,000
Estimate of Fair Value Measurement [Member] | U.S. obligations single-family | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS Securities		1,894,417,000		1,538,389,000
Estimate of Fair Value Measurement [Member] | Private label MBS [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS Securities		119,355,000		125,808,000
Estimate of Fair Value Measurement [Member] | Mortgage Receivable [Member] | Forward Contracts [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets				155,000
Derivative liabilities		392,000		26,000
Single Family [Member] | GSE MBS [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		4,090,237,000		2,047,752,000
Single Family [Member] | GSE MBS [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS Securities		0
Fair Value				0
Single Family [Member] | GSE MBS [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS Securities		4,090,237,000
Fair Value				2,047,752,000
Single Family [Member] | GSE MBS [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS Securities		0
Single Family [Member] | Estimate of Fair Value Measurement [Member] | GSE MBS [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS Securities		4,090,237,000		2,047,752,000
Multifamily [Member] | GSE MBS [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		6,515,348,000		6,277,529,000
Multifamily [Member] | GSE MBS [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS Securities		0
Fair Value				0
Multifamily [Member] | GSE MBS [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS Securities		6,515,348,000
Fair Value				6,277,529,000
Multifamily [Member] | GSE MBS [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS Securities		0
Fair Value				0
Multifamily [Member] | Estimate of Fair Value Measurement [Member] | GSE MBS [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS Securities		$ 6,515,348,000		$ 6,277,529,000
[1] Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions and also cash collateral held and related interest accrued or placed by the Bank with the same clearing agent and/or counterparties.

Estimated Fair Values (Level 3

Estimated Fair Values (Level 3 Reconciliation) (Details) - Private label MBS [Member] - Fair Value, Recurring [Member] - Fair Value, Inputs, Level 3 - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Purchases, issuances, sales, and settlements:
Change in unrealized gains (losses) for the period included in other comprehensive income (loss) for assets held at September 30	$ 3,780	$ 94	$ 1,505	$ 1,899
Available-for-sale Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	116,982	134,685	125,808	142,271
(Provision) benefit for credit losses	889	(1,566)	(1,061)	(3,040)
Accretion of credit losses in interest income	1,582	1,660	4,465	4,939
Net unrealized gains (losses) on AFS in OCI	3,780	(4,659)	1,505	(8,461)
Purchases, issuances, sales, and settlements:
Settlements	(3,878)	(3,263)	(11,362)	(8,852)
Balance, end of period	119,355	126,857	119,355	126,857
Total amount of gains for the periods presented included in earnings attributable to the change in unrealized gains (losses) relating to assets and liabilities still held at September 30	$ 2,471	$ (4,659)	$ 3,404	$ (8,461)

Commitments and Contingencies_2

Commitments and Contingencies (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2024	Dec. 31, 2023
Loss Contingencies [Line Items]
Off-balance Sheet Risks, with annual renewal option		$ 7,600,000	$ 7,000,000
Maximum Commitment Period		60 days
Other liabilities		$ 181,868	441,360
Rollover (weekly/monthly) advance Product
Loss Contingencies [Line Items]
Rollover -weekly/monthly advance product Outstanding		$ 11,500,000	10,000,000
Maximum
Loss Contingencies [Line Items]
Letter of Credit Renewal Period		5 years
Standby Letters of Credit Issuance Commitments [Member]
Loss Contingencies [Line Items]
Total		$ 94,100	32,000
Standby letters of credit outstanding (1) (2)
Loss Contingencies [Line Items]
Expiration Date Within One Year	[1],[2]	30,897,854
Expiration Date After One Year	[1],[2]	0
Total	[1],[2]	30,897,854	28,789,179
Other liabilities		6,500	5,000
Commitments to purchase mortgage loans | Mortgage Receivable [Member]
Loss Contingencies [Line Items]
Expiration Date Within One Year		21,095	30,028
Expiration Date After One Year		0
Total		21,095
Unsettled consolidated obligation bonds, at par
Loss Contingencies [Line Items]
Expiration Date Within One Year		461,000	78,000
Expiration Date After One Year		0
Total		461,000
Unsettled consolidated obligation discount notes, at par [Member]
Loss Contingencies [Line Items]
Expiration Date Within One Year		845,790
Expiration Date After One Year		0
Total		$ 845,790	$ 0
[1]Excludes approved requests to issue future standby letters of credit of $94.1 million at September 30, 2024 and $32.0 million at December 31, 2023. and $7.0 billion at December 31, 2023, have renewal language that permits the letter of credit to be renewed for an additional period with a maximum renewal period of approximately five years.