Mortgage Loans - Financial Effects of Single-Family Loan Restructurings Involving Borrowers Experiencing Financial Difficulty (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
20- and 30-year or more, amortizing fixed-rate
financing receivable, loan restructuring [Line Items]
Weighted average interest rate reduction	0.60%	0.50%	1.00%
Weighted average term extension	150 months	168 months	175 months
Weighted average payment deferral or principal forbearance	$ 25	$ 16	$ 16
15-year or less, amortizing fixed-rate
financing receivable, loan restructuring [Line Items]
Weighted average interest rate reduction		0.00%	0.00%
Weighted average term extension	36 months	10 months	0 months
Weighted average payment deferral or principal forbearance	$ 11	$ 12	$ 15
Adjustable-rate and other
financing receivable, loan restructuring [Line Items]
Weighted average interest rate reduction	0.80%	1.00%	1.60%
Weighted average term extension	145 months	229 months	202 months
Weighted average payment deferral or principal forbearance	$ 14	$ 15	$ 17

FEDERAL HOME LOAN MORTGAGE CORP 10-K