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FARMER MAC GUARANTEED SECURITIES AND USDA SECURITIES - Narrative (Details) - AgVantage $ in Millions | Jul. 01, 2023 USD ($) | Sep. 30, 2024 security | Dec. 31, 2023 security
--- | --- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |  |
Held-to-maturity, transfer in | $ | $ 2,700.0 |  |
Held-to-maturity, transfer in, unrealized loss | $ | 31.9 |  |
Held-to-maturity, transfer in, accumulated unrealized loss | $ | $ 31.9 |  |
Farmer Mac Guaranteed Securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Available-for-sale, securities in unrealized loss positions |  | 58 | 68
Held-to-maturity, securities in unrealized loss positions |  | 48 | 53
Unrealized loss position for more than 12 months, number of securities in loss position |  | 57 | 62
Debt securities, held-to-maturity, unrealized loss position for more than 12 months, number of securities in loss position |  | 16 | 22

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