Short-term and Long-term Debt - Short-Term Debt (Details) - USD ($) $ in Millions |
Sep. 30, 2026 |
Dec. 31, 2025 |
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| Short-term Debt [Abstract] | ||
| Short-term Debt | $ 9,525 | $ 37,718 |
| Held by Freddie Mac | ||
| Short-term Debt [Abstract] | ||
| Short-term debt par value | 9,581 | 37,867 |
| Short-term Debt | $ 9,525 | $ 37,718 |
| Short-term debt weighted average effective rate | 3.79% | 3.82% |
| Held by Freddie Mac | Variable Rate | Callable Short Term Notes [Member] | ||
| Short-term Debt [Abstract] | ||
| Short-term debt par value | $ 200 | $ 3,000 |
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- Definition Par value of total other short-term debt. No definition available.
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- Definition Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition Weighted average interest rate of short-term debt outstanding calculated at point in time. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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