v3.26.1
Estimated Fair Values - Recurring and Non-Recurring Basis (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Assets:    
Available-for-sale securities (amortized cost of $15,546,015 and $15,251,368) (Note 3) $ 15,642,918 $ 15,319,045
Derivative assets, net 458,746 445,491
Netting adjustments and cash collateral, derivative asset [1],[2] 32,044 55,624
Liabilities:    
Derivative liabilities, net 3,374 935
Netting adjustments and cash collateral, derivative liability [1],[2] (493,790) (551,733)
Fair Value, Measurements, Recurring    
Assets:    
Netting adjustments and cash collateral, derivative asset [3] 32,044 55,624
Liabilities:    
Netting adjustments and cash collateral, derivative liability [3] (493,790) (551,733)
Fair Value, Measurements, Recurring | Interest-rate related    
Assets:    
Netting adjustments and cash collateral, derivative asset [3] 32,044 55,624
Liabilities:    
Netting adjustments and cash collateral, derivative liability [3] (493,790) (551,733)
Level 1    
Assets:    
Trading securities 0 0
Available-for-sale securities (amortized cost of $15,546,015 and $15,251,368) (Note 3) 0 0
Derivative assets, net 0 0
Grantor trust assets [4] 47,223 44,195
Liabilities:    
Derivative liabilities, net 0 0
Level 1 | Fair Value, Measurements, Recurring    
Assets:    
Trading securities 0 0
Available-for-sale securities (amortized cost of $15,546,015 and $15,251,368) (Note 3) 0 0
Derivative assets, net 0 0
Grantor trust assets 47,223 44,195
Total assets at estimated fair value 47,223 44,195
Liabilities:    
Derivative liabilities, net 0 0
Total liabilities at recurring estimated fair value 0 0
Level 1 | Fair Value, Measurements, Recurring | Interest-rate related    
Assets:    
Derivative assets, net 0 0
Liabilities:    
Derivative liabilities, net 0 0
Level 2    
Assets:    
Trading securities 1,095,821 1,101,519
Available-for-sale securities (amortized cost of $15,546,015 and $15,251,368) (Note 3) 15,642,918 15,319,045
Derivative assets, net 426,702 389,867
Grantor trust assets [4] 0 0
Liabilities:    
Derivative liabilities, net 497,164 552,668
Level 2 | Fair Value, Measurements, Recurring    
Assets:    
Trading securities 1,095,821 1,101,519
Available-for-sale securities (amortized cost of $15,546,015 and $15,251,368) (Note 3) 15,642,918 15,319,045
Derivative assets, net 426,702 389,867
Grantor trust assets 0 0
Total assets at estimated fair value 17,165,441 16,810,431
Liabilities:    
Derivative liabilities, net 497,164 552,668
Total liabilities at recurring estimated fair value 497,164 552,668
Level 2 | Fair Value, Measurements, Recurring | Interest-rate related    
Assets:    
Derivative assets, net 426,422 389,771
Liabilities:    
Derivative liabilities, net 497,055 552,664
Level 3    
Assets:    
Trading securities 0 0
Available-for-sale securities (amortized cost of $15,546,015 and $15,251,368) (Note 3) 0 0
Derivative assets, net 0 0
Grantor trust assets [4] 0 0
Liabilities:    
Derivative liabilities, net 0 0
Level 3 | Fair Value, Measurements, Recurring    
Assets:    
Trading securities 0 0
Available-for-sale securities (amortized cost of $15,546,015 and $15,251,368) (Note 3) 0 0
Derivative assets, net 0 0
Grantor trust assets 0 0
Total assets at estimated fair value 0 0
Liabilities:    
Derivative liabilities, net 0 0
Total liabilities at recurring estimated fair value 0 0
Level 3 | Fair Value, Measurements, Recurring | Interest-rate related    
Assets:    
Derivative assets, net 0 0
Liabilities:    
Derivative liabilities, net 0 0
U.S. Treasury obligations    
Assets:    
Trading securities 1,095,821 1,101,519
Available-for-sale securities (amortized cost of $15,546,015 and $15,251,368) (Note 3) 6,439,531 6,008,304
U.S. Treasury obligations | Level 1 | Fair Value, Measurements, Recurring    
Assets:    
Trading securities 0 0
Available-for-sale securities (amortized cost of $15,546,015 and $15,251,368) (Note 3) 0 0
U.S. Treasury obligations | Level 2 | Fair Value, Measurements, Recurring    
Assets:    
Trading securities 1,095,821 1,101,519
Available-for-sale securities (amortized cost of $15,546,015 and $15,251,368) (Note 3) 6,439,531 6,008,304
U.S. Treasury obligations | Level 3 | Fair Value, Measurements, Recurring    
Assets:    
Trading securities 0 0
Available-for-sale securities (amortized cost of $15,546,015 and $15,251,368) (Note 3) 0 0
GSE and TVA debentures    
Assets:    
Available-for-sale securities (amortized cost of $15,546,015 and $15,251,368) (Note 3) 954,394 1,474,220
GSE and TVA debentures | Level 1 | Fair Value, Measurements, Recurring    
Assets:    
Available-for-sale securities (amortized cost of $15,546,015 and $15,251,368) (Note 3) 0 0
GSE and TVA debentures | Level 2 | Fair Value, Measurements, Recurring    
Assets:    
Available-for-sale securities (amortized cost of $15,546,015 and $15,251,368) (Note 3) 954,394 1,474,220
GSE and TVA debentures | Level 3 | Fair Value, Measurements, Recurring    
Assets:    
Available-for-sale securities (amortized cost of $15,546,015 and $15,251,368) (Note 3) 0 0
GSE MBS | Multifamily    
Assets:    
Available-for-sale securities (amortized cost of $15,546,015 and $15,251,368) (Note 3) 8,248,993 7,836,521
GSE MBS | Level 1 | Fair Value, Measurements, Recurring | Multifamily    
Assets:    
Available-for-sale securities (amortized cost of $15,546,015 and $15,251,368) (Note 3) 0 0
GSE MBS | Level 2 | Fair Value, Measurements, Recurring | Multifamily    
Assets:    
Available-for-sale securities (amortized cost of $15,546,015 and $15,251,368) (Note 3) 8,248,993 7,836,521
GSE MBS | Level 3 | Fair Value, Measurements, Recurring | Multifamily    
Assets:    
Available-for-sale securities (amortized cost of $15,546,015 and $15,251,368) (Note 3) 0 0
MDCs | Fair Value, Measurements, Recurring | Interest-rate forwards    
Assets:    
Netting adjustments and cash collateral, derivative asset [3] 0 0
Liabilities:    
Netting adjustments and cash collateral, derivative liability [3] 0 0
MDCs | Level 1 | Fair Value, Measurements, Recurring | Interest-rate forwards    
Assets:    
Derivative assets, net 0 0
Liabilities:    
Derivative liabilities, net 0 0
MDCs | Level 2 | Fair Value, Measurements, Recurring | Interest-rate forwards    
Assets:    
Derivative assets, net 280 96
Liabilities:    
Derivative liabilities, net 109 4
MDCs | Level 3 | Fair Value, Measurements, Recurring | Interest-rate forwards    
Assets:    
Derivative assets, net 0 0
Liabilities:    
Derivative liabilities, net 0 0
Total    
Assets:    
Trading securities 1,095,821 1,101,519
Available-for-sale securities (amortized cost of $15,546,015 and $15,251,368) (Note 3) 15,642,918 15,319,045
Derivative assets, net 458,746 445,491
Grantor trust assets [4] 47,223 44,195
Liabilities:    
Derivative liabilities, net 3,374 935
Total | Fair Value, Measurements, Recurring    
Assets:    
Trading securities 1,095,821 1,101,519
Available-for-sale securities (amortized cost of $15,546,015 and $15,251,368) (Note 3) 15,642,918 15,319,045
Derivative assets, net 458,746 445,491
Grantor trust assets 47,223 44,195
Total assets at estimated fair value 17,244,708 16,910,250
Liabilities:    
Derivative liabilities, net 3,374 935
Total liabilities at recurring estimated fair value 3,374 935
Total | Fair Value, Measurements, Recurring | Interest-rate related    
Assets:    
Derivative assets, net 458,466 445,395
Liabilities:    
Derivative liabilities, net 3,265 931
Total | U.S. Treasury obligations | Fair Value, Measurements, Recurring    
Assets:    
Trading securities 1,095,821 1,101,519
Available-for-sale securities (amortized cost of $15,546,015 and $15,251,368) (Note 3) 6,439,531 6,008,304
Total | GSE and TVA debentures | Fair Value, Measurements, Recurring    
Assets:    
Available-for-sale securities (amortized cost of $15,546,015 and $15,251,368) (Note 3) 954,394 1,474,220
Total | GSE MBS | Fair Value, Measurements, Recurring | Multifamily    
Assets:    
Available-for-sale securities (amortized cost of $15,546,015 and $15,251,368) (Note 3) 8,248,993 7,836,521
Total | MDCs | Fair Value, Measurements, Recurring | Interest-rate forwards    
Assets:    
Derivative assets, net 280 96
Liabilities:    
Derivative liabilities, net $ 109 $ 4
[1] Represents the application of the netting requirements that allow us to settle (i) positive and negative positions and (ii) cash collateral and related accrued interest held or placed with the same clearing agent and/or counterparty. Cash collateral pledged to counterparties at June 30, 2026 and December 31, 2025, including accrued interest, totaled $668,506 and $719,187, respectively. Cash collateral received from counterparties and held at June 30, 2026 and December 31, 2025, including accrued interest, totaled $142,672 and $111,829, respectively.
[2] Represents the application of the netting requirements that allow us to settle (i) positive and negative positions and (ii) cash collateral and related accrued interest held or placed with the same clearing agent and/or counterparty.
[3] Represents the application of the netting requirements that allow us to settle (i) positive and negative positions and (ii) cash collateral and related accrued interest held or placed with the same clearing agent and/or counterparty
[4] Included in other assets on the statement of condition.