Fair Value Disclosures Fair Value Disclosures - Changes in Fair Value under the FVO option (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Mortgage loans held-for-sale | ||
| Fair Value, Option, Quantitative Disclosures [Line Items] | ||
| Fair Value, Option, Changes in Fair Value, Gain (Loss) | $ 0 | $ 227 |
| Mortgage loans held-for-investment | ||
| Fair Value, Option, Quantitative Disclosures [Line Items] | ||
| Fair Value, Option, Changes in Fair Value, Gain (Loss) | (24) | 48 |
| Debt | Held by Freddie Mac | ||
| Fair Value, Option, Quantitative Disclosures [Line Items] | ||
| Fair Value, Option, Changes in Fair Value, Gain (Loss) | 3 | 11 |
| Debt | Held by consolidated trusts | ||
| Fair Value, Option, Quantitative Disclosures [Line Items] | ||
| Fair Value, Option, Changes in Fair Value, Gain (Loss) | 34 | (47) |
| Other assets/other liabilities | ||
| Fair Value, Option, Quantitative Disclosures [Line Items] | ||
| Fair Value, Option, Changes in Fair Value, Gain (Loss) | $ 0 | $ 100 |