Consolidated Obligations (Details) - USD ($) $ in Billions |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Schedule of Short-term and Long-term Debt [Line Items] | ||
| Percent of Fixed Rate Long Term Debt Swapped to An Adjustable Rate | 85.00% | 86.00% |
| FHLBanks [Member] | ||
| Schedule of Short-term and Long-term Debt [Line Items] | ||
| Obligation with Joint and Several Liability Arrangement, Amount Outstanding | $ 1,331.0 | $ 1,152.0 |
| FHL Bank of Dallas [Member] | ||
| Schedule of Short-term and Long-term Debt [Line Items] | ||
| Obligation with Joint and Several Liability Arrangement, Amount Recognized | $ 96.7 | $ 98.8 |