v3.25.3
Estimated Fair Values (Carrying Value and Fair Value of Financial Instruments) (Details) - USD ($)
Sep. 30, 2025
Dec. 31, 2024
Sep. 30, 2024
Dec. 31, 2023
Reported Value Measurement [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Cash and due from banks $ 19,543,000 $ 17,340,000    
Interest-bearing deposits 2,473,784,000 2,726,628,000    
Securities Purchased under Agreements to Resell, Fair Value Disclosure 2,280,000,000 6,280,000,000    
Federal funds sold 5,903,000,000 2,664,000,000    
Trading securities 119,169,000 149,153,000    
Fair Value 17,832,294,000 18,163,843,000    
HTM securities; fair value of $1,173,394 and $1,219,392 1,221,361,000 1,298,808,000    
Advances 42,164,297,000 69,873,233,000    
Accrued interest receivable 308,636,000 469,154,000    
Derivative assets 301,096,000 353,629,000    
Deposits 576,741,000 774,883,000    
Mandatorily redeemable capital stock (Note 7) 6,085,000 7,025,000    
Accrued interest payable 424,768,000 540,958,000    
Derivative liabilities 13,387,000 8,666,000    
Cash and due from banks 19,543,000 17,340,000    
Fair Value 17,832,294,000 18,163,843,000    
HTM securities; fair value of $1,173,394 and $1,219,392 [1] 1,221,361,000 1,298,808,000    
HTM securities 1,173,394,000 1,219,392,000    
Accrued interest receivable 308,636,000 469,154,000    
Derivative assets 301,096,000 353,629,000    
Derivative Asset, Subject to Master Netting Arrangement, Gross Liability and Collateral, Obligation to Return Cash, Offset [2],[3] 195,599,000 286,230,000    
Mandatorily redeemable capital stock (Note 7) 6,085,000 7,025,000 $ 27,554,000 $ 27,874,000
Accrued interest payable 424,768,000 540,958,000    
Derivative liabilities 13,387,000 8,666,000    
Derivative Liability, Subject to Master Netting Arrangement, Gross Asset and Collateral, Right to Reclaim Cash, Offset [3] (170,574,000) (363,409,000) [2]    
GSE obligations        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Trading securities 119,169,000 149,153,000    
Fair Value 862,486,000 907,124,000    
U.S. Treasury obligations        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Fair Value 3,952,753,000 4,112,955,000    
State or local agency obligations [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Fair Value 172,001,000 169,336,000    
Single Family, Mortgage-backed Securities, Other US Obligations [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Fair Value 1,401,260,000 1,712,384,000    
HTM securities; fair value of $1,173,394 and $1,219,392 519,803,000 635,986,000    
HTM securities 520,597,000 627,588,000    
GSE MBS [Member] | Multifamily [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Fair Value 6,380,268,000 6,550,664,000    
HTM securities; fair value of $1,173,394 and $1,219,392 239,018,000 243,913,000    
HTM securities 237,662,000 235,854,000    
GSE MBS [Member] | Single Family [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Fair Value 4,958,359,000 4,597,885,000    
HTM securities; fair value of $1,173,394 and $1,219,392 431,872,000 382,388,000    
HTM securities 385,834,000 321,230,000    
Private label MBS [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Fair Value 105,167,000 113,495,000    
HTM securities; fair value of $1,173,394 and $1,219,392 30,668,000 36,521,000    
HTM securities 29,301,000 34,720,000    
Fair Value, Recurring [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Derivative Asset, Subject to Master Netting Arrangement, Gross Liability and Collateral, Obligation to Return Cash, Offset 195,599,000 286,230,000    
Derivative Liability, Subject to Master Netting Arrangement, Gross Asset and Collateral, Right to Reclaim Cash, Offset (170,574,000) [2] (363,409,000)    
Interest Rate Swap [Member] | Fair Value, Recurring [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Derivative Asset, Subject to Master Netting Arrangement, Gross Liability and Collateral, Obligation to Return Cash, Offset 195,599,000 286,230,000    
Derivative Liability, Subject to Master Netting Arrangement, Gross Asset and Collateral, Right to Reclaim Cash, Offset (170,574,000) (363,409,000)    
Forward Contracts [Member] | Fair Value, Recurring [Member] | Mortgage Receivable [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Derivative Asset, Subject to Master Netting Arrangement, Gross Liability and Collateral, 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 19,543,000 17,340,000    
Interest-bearing deposits 2,473,784,000 2,726,628,000    
Securities Purchased under Agreements to Resell, Fair Value Disclosure [4] 2,280,005,000 6,279,993,000    
Federal funds sold 5,903,000,000 2,663,996,000    
Trading securities 119,169,000 149,153,000    
Fair Value 17,832,294,000 18,163,843,000    
HTM securities 1,173,394,000 1,219,392,000    
Advances 42,191,968,000 69,888,161,000    
Accrued interest receivable 308,636,000 469,154,000    
Derivative assets 301,096,000 353,629,000    
Deposits 576,741,000 774,883,000    
Mandatorily redeemable capital stock (Note 7) [5] 6,228,000 7,568,000    
Accrued interest payable [5] 424,625,000 540,415,000    
Derivative liabilities 13,387,000 8,666,000    
Estimate of Fair Value, Fair Value Disclosure | Fair Value, Recurring [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Trading securities 119,169,000 149,153,000    
AFS Securities 17,832,294,000 18,163,843,000    
Derivative assets 301,096,000 353,629,000    
Derivative liabilities 13,387,000 8,666,000    
Total assets at fair value 18,252,559,000 18,666,625,000    
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 119,169,000 149,153,000    
AFS Securities 862,486,000 907,124,000    
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 3,952,753,000 4,112,955,000    
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 172,001,000 169,336,000    
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 1,401,260,000 1,712,384,000    
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 6,380,268,000 6,550,664,000    
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 4,958,359,000 4,597,885,000    
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 105,167,000 113,495,000    
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 8,870,000 8,090,000    
REO - FV 94,000 312,000    
Total assets at fair value 8,964,000 8,402,000    
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 301,095,000 353,622,000    
Derivative liabilities 13,074,000 8,429,000    
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 1,000 7,000    
Derivative liabilities 313,000 237,000    
Consolidated Obligations, Discount Notes | Reported Value Measurement [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Discount notes 12,226,613,000 11,685,159,000    
Consolidated Obligations, Discount Notes | Estimate of Fair Value, Fair Value Disclosure        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Discount notes 12,225,409,000 11,683,853,000    
Consolidated Obligation Bonds | Reported Value Measurement [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Bonds 59,653,325,000 87,965,104,000    
Consolidated Obligation Bonds | Estimate of Fair Value, Fair Value Disclosure        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Bonds 59,256,277,000 87,349,924,000    
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 5,187,822,000 4,816,452,000    
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 4,779,683,000 4,233,555,000    
Fair Value, Inputs, Level 1        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Cash and due from banks 19,543,000 17,340,000    
Interest-bearing deposits 2,473,784,000 2,726,628,000    
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) 6,228,000 7,568,000    
Accrued interest payable 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 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 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] 2,280,005,000 6,279,993,000    
Federal funds sold 5,903,000,000 2,663,996,000    
Trading securities 119,169,000 149,153,000    
Fair Value 17,727,127,000 18,050,348,000    
HTM securities 1,144,093,000 1,184,672,000    
Advances 42,191,968,000 69,888,161,000    
Accrued interest receivable 308,636,000 469,154,000    
Derivative assets 105,497,000 67,399,000    
Deposits 576,741,000 774,883,000    
Mandatorily redeemable capital stock (Note 7) 0    
Accrued interest payable 424,625,000 540,415,000    
Derivative liabilities 183,961,000 372,075,000    
Fair Value, Inputs, Level 2 | Fair Value, Recurring [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Trading securities 119,169,000 149,153,000    
AFS Securities 17,727,127,000 18,050,348,000    
Derivative assets 105,497,000 67,399,000    
Derivative liabilities 183,961,000 372,075,000    
Total assets at fair value 17,951,793,000 18,266,900,000    
Fair Value, Inputs, Level 2 | Fair Value, Recurring [Member] | GSE obligations        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Trading securities 119,169,000 149,153,000    
AFS Securities 862,486,000 907,124,000    
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 3,952,753,000 4,112,955,000    
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 172,001,000      
Fair Value   169,336,000    
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 1,401,260,000      
Fair Value   1,712,384,000    
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 6,380,268,000      
Fair Value   6,550,664,000    
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 4,958,359,000      
Fair Value   4,597,885,000    
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 105,496,000 67,392,000    
Derivative liabilities 183,648,000 371,838,000    
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 1,000 7,000    
Derivative liabilities 313,000 237,000    
Fair Value, Inputs, Level 2 | Consolidated Obligations, Discount Notes        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Discount notes 12,225,409,000 11,683,853,000    
Fair Value, Inputs, Level 2 | Consolidated Obligation Bonds        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Bonds 59,256,277,000 87,349,924,000    
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 4,779,683,000 4,233,555,000    
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 105,167,000 113,495,000    
HTM securities 29,301,000 34,720,000    
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 105,167,000 113,495,000    
Derivative assets 0 0    
Derivative liabilities 0 0    
Total assets at fair value 105,167,000 113,495,000    
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 105,167,000      
Fair Value   113,495,000    
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 8,870,000 8,090,000    
REO - FV 94,000 312,000    
Total assets at fair value 8,964,000 8,402,000    
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 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 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 investments for accretion and amortization and excludes accrued interest receivable of $4.3 million at September 30, 2025 and $4.5 million at December 31, 2024.
[2] 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.
[3] 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. Cash collateral posted including accrued interest was $401.0 million for September 30, 2025 and $658.4 million for December 31, 2024. Cash collateral received was $34.9 million for September 30, 2025 and $8.8 million for December 31, 2024
[4] 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, 2025 and December 31, 2024. These instruments’ maturity term is overnight.
[5] 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.