v3.26.1
Estimated Fair Values (Carrying Value and Fair Value of Financial Instruments) (Details) - USD ($)
Jun. 30, 2026
Dec. 31, 2025
Jun. 30, 2025
Dec. 31, 2024
Reported Value Measurement [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Cash and due from banks $ 36,728,000 $ 32,585,000    
Interest-bearing deposits 3,463,600,000 2,408,873,000    
Securities Purchased under Agreements to Resell, Fair Value Disclosure 2,200,000,000 2,680,000,000    
Federal funds sold 7,097,000,000 5,977,000,000    
Trading securities 113,575,000 119,676,000    
Fair Value 20,595,928,000 18,189,327,000    
HTM securities; fair value of $961,993 and $1,099,599 1,013,785,000 1,143,705,000    
Advances 77,683,630,000 36,819,992,000    
Accrued interest receivable 371,342,000 261,589,000    
Derivative assets 344,620,000 350,117,000    
Deposits 598,618,000 590,785,000    
Mandatorily redeemable capital stock (Note 7) 13,379,000 12,344,000    
Accrued interest payable 413,359,000 305,053,000    
Derivative liabilities 7,032,000 1,994,000    
Cash and due from banks 36,728,000 32,585,000    
Fair Value 20,595,928,000 18,189,327,000    
HTM securities; fair value of $961,993 and $1,099,599 [1] 1,013,785,000 1,143,705,000    
HTM securities 961,993,000 1,099,599,000    
Accrued interest receivable 371,342,000 261,589,000    
Derivative assets 344,620,000 350,117,000    
Derivative Asset, Subject to Master Netting Arrangement, Gross Liability and Collateral, Obligation to Return Cash, Offset [2],[3] 235,783,000 271,014,000    
Mandatorily redeemable capital stock (Note 7) 13,379,000 12,344,000 $ 6,231,000 $ 7,025,000
Accrued interest payable 413,359,000 305,053,000    
Derivative liabilities 7,032,000 1,994,000    
Derivative Liability, Subject to Master Netting Arrangement, Gross Asset and Collateral, Right to Reclaim Cash, Offset [3] (72,808,000) (124,837,000) [2]    
GSE obligations        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Trading securities 113,575,000 119,676,000    
Fair Value 775,565,000 834,063,000    
U.S. Treasury obligations        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Fair Value 5,105,478,000 4,912,280,000    
State or local agency obligations [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Fair Value 175,902,000 174,833,000    
Single Family, Mortgage-backed Securities, Other US Obligations [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Fair Value 1,447,418,000 1,303,882,000    
HTM securities; fair value of $961,993 and $1,099,599 389,709,000 470,133,000    
HTM securities 387,563,000 471,865,000    
GSE MBS [Member] | Multifamily [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Fair Value 7,143,406,000 6,314,368,000    
HTM securities; fair value of $961,993 and $1,099,599 238,129,000 238,829,000    
HTM securities 234,605,000 238,031,000    
GSE MBS [Member] | Single Family [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Fair Value 5,852,554,000 4,547,773,000    
HTM securities; fair value of $961,993 and $1,099,599 358,902,000 405,197,000    
HTM securities 313,985,000 361,389,000    
Private label MBS [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Fair Value 95,605,000 102,128,000    
HTM securities; fair value of $961,993 and $1,099,599 27,045,000 29,546,000    
HTM securities 25,840,000 28,314,000    
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 235,783,000 271,014,000    
Derivative Liability, Subject to Master Netting Arrangement, Gross Asset and Collateral, Right to Reclaim Cash, Offset (72,808,000) [2] (124,837,000)    
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 235,783,000 271,014,000    
Derivative Liability, Subject to Master Netting Arrangement, Gross Asset and Collateral, Right to Reclaim Cash, Offset (72,808,000) (124,837,000)    
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 36,728,000 32,585,000    
Interest-bearing deposits 3,463,600,000 2,408,873,000    
Securities Purchased under Agreements to Resell, Fair Value Disclosure [4] 2,200,000,000 2,680,006,000    
Federal funds sold 7,096,993,000 5,976,975,000    
Trading securities 113,575,000 119,676,000    
Fair Value 20,595,928,000 18,189,327,000    
HTM securities 961,993,000 1,099,599,000    
Advances 77,639,644,000 36,861,975,000    
Accrued interest receivable 371,342,000 261,590,000    
Derivative assets 344,620,000 350,117,000    
Deposits 598,618,000 590,785,000    
Mandatorily redeemable capital stock (Note 7) [5] 13,710,000 12,638,000    
Accrued interest payable [5] 413,028,000 304,759,000    
Derivative liabilities 7,032,000 1,994,000    
Estimate of Fair Value, Fair Value Disclosure | Fair Value, Recurring [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Trading securities 113,575,000 119,676,000    
AFS Securities 20,595,928,000 18,189,327,000    
Derivative assets 344,620,000 350,117,000    
Derivative liabilities 7,032,000 1,994,000    
Total assets at fair value 21,054,123,000 18,659,120,000    
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 113,575,000 119,676,000    
AFS Securities 775,565,000 834,063,000    
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 5,105,478,000 4,912,280,000    
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 175,902,000 174,833,000    
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 1,447,418,000 1,303,882,000    
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 7,143,406,000 6,314,368,000    
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 5,852,554,000 4,547,773,000    
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 95,605,000 102,128,000    
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 5,399,000 10,751,000    
REO - FV 906,000 328,000    
Total assets at fair value 6,305,000 11,079,000    
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 344,613,000 350,111,000    
Derivative liabilities 6,082,000 1,396,000    
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 7,000 6,000    
Derivative liabilities 950,000 598,000    
Consolidated Obligations, Discount Notes | Reported Value Measurement [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Discount notes 29,428,993,000 16,697,025,000    
Consolidated Obligations, Discount Notes | Estimate of Fair Value, Fair Value Disclosure        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Discount notes 29,423,669,000 16,698,670,000    
Consolidated Obligation Bonds | Reported Value Measurement [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Bonds 81,349,327,000 50,795,251,000    
Consolidated Obligation Bonds | Estimate of Fair Value, Fair Value Disclosure        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Bonds 80,890,944,000 50,432,389,000    
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 5,476,529,000 5,220,302,000    
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 5,080,714,000 4,856,826,000    
Fair Value, Inputs, Level 1        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Cash and due from banks 36,728,000 32,585,000    
Interest-bearing deposits 3,463,600,000 2,408,873,000    
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) 13,710,000 12,638,000    
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 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] 2,200,000,000 2,680,006,000    
Federal funds sold 7,096,993,000 5,976,975,000    
Trading securities 113,575,000 119,676,000    
Fair Value 20,500,323,000 18,087,199,000    
HTM securities 936,153,000 1,071,285,000    
Advances 77,639,644,000 36,861,975,000    
Accrued interest receivable 371,342,000 261,590,000    
Derivative assets 108,837,000 79,103,000    
Deposits 598,618,000 590,785,000    
Mandatorily redeemable capital stock (Note 7) 0 0    
Accrued interest payable 413,028,000 304,759,000    
Derivative liabilities 79,840,000 126,831,000    
Fair Value, Inputs, Level 2 | Fair Value, Recurring [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Trading securities 113,575,000 119,676,000    
AFS Securities 20,500,323,000 18,087,199,000    
Derivative assets 108,837,000 79,103,000    
Derivative liabilities 79,840,000 126,831,000    
Total assets at fair value 20,722,735,000 18,285,978,000    
Fair Value, Inputs, Level 2 | Fair Value, Recurring [Member] | GSE obligations        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Trading securities 113,575,000 119,676,000    
AFS Securities 775,565,000 834,063,000    
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 5,105,478,000 4,912,280,000    
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 175,902,000      
Fair Value   174,833,000    
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 1,447,418,000      
Fair Value   1,303,882,000    
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 7,143,406,000      
Fair Value   6,314,368,000    
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 5,852,554,000      
Fair Value   4,547,773,000    
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 108,830,000 79,097,000    
Derivative liabilities 78,890,000 126,233,000    
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 7,000 6,000    
Derivative liabilities 950,000 598,000    
Fair Value, Inputs, Level 2 | Consolidated Obligations, Discount Notes        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Discount notes 29,423,669,000 16,698,670,000    
Fair Value, Inputs, Level 2 | Consolidated Obligation Bonds        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Bonds 80,890,944,000 50,432,389,000    
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 5,080,714,000 4,856,826,000    
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 95,605,000 102,128,000    
HTM securities 25,840,000 28,314,000    
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 95,605,000 102,128,000    
Derivative assets 0 0    
Derivative liabilities 0 0    
Total assets at fair value 95,605,000 102,128,000    
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 95,605,000      
Fair Value   102,128,000    
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 5,399,000 10,751,000    
REO - FV 906,000 328,000    
Total assets at fair value 6,305,000 11,079,000    
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 $3.4 million at June 30, 2026 and $3.9 million at December 31, 2025.
[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 $350.1 million for June 30, 2026 and $411.3 million for December 31, 2025. Cash collateral received was $41.5 million for June 30, 2026 and $15.5 million for December 31, 2025
[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 June 30, 2026 and December 31, 2025. 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.