Consolidated Obligations Callable/Non-callable (Details) - Unsecured Debt [Member] - USD ($) $ in Thousands |
Mar. 31, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Long-term Debt Callable or Non-Callable [Line Items] | ||
| Debt, Gross | $ 60,660,575 | $ 58,340,975 |
| Non Callable [Member] | ||
| Long-term Debt Callable or Non-Callable [Line Items] | ||
| Debt, Gross | 31,940,075 | 31,777,075 |
| Callable [Member] | ||
| Long-term Debt Callable or Non-Callable [Line Items] | ||
| Debt, Gross | $ 28,720,500 | $ 26,563,900 |