Segment Reporting - Schedule of Assets by Segment (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Segment Reporting [Line Items]
Total assets	$ 4,332,343	$ 4,317,538
Business segments \| Single-Family
Segment Reporting [Line Items]
Total assets	3,755,422	3,757,261
Business segments \| Multifamily
Segment Reporting [Line Items]
Total assets	$ 576,921	$ 560,277

Amount of asset recognized for present right to economic benefit.

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+ Details

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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+ Details