Segment Reporting - Schedule of Assets by Segment (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 4,317,538	$ 4,349,731
Operating Segments | Single-Family
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	3,757,261	3,823,840
Operating Segments | Multifamily
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 560,277	$ 525,891