FARMER MAC GUARANTEED SECURITIES AND USDA SECURITIES - Narrative (Details) - Farmer Mac Guaranteed Securities - AgVantage - security	Sep. 30, 2025	Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, securities in unrealized loss positions	51	66
Held-to-maturity, securities in unrealized loss positions	22	45
Unrealized loss position for more than 12 months, number of securities in loss position	48	54
Debt securities, held-to-maturity, unrealized loss position for more than 12 months, number of securities in loss position	17	26