Mortgage Loans - Loan Restructuring - Financial Impacts (Details) - Single-family	12 Months Ended
	Dec. 31, 2023 USD ($) mo	Dec. 31, 2022 USD ($) mo
20- and 30-year or more, amortizing fixed-rate
Loans in Mortgage Portfolio [Line Items]
Weighted-Average Interest Rate Reduction	1.06%	1.42%
Weighted-Average Term Extension (in Months) | mo	171	179
Average amount capitalized as a result of a payment delay | $	$ 16,186	$ 22,248
15-year or less, amortizing fixed-rate
Loans in Mortgage Portfolio [Line Items]
Weighted-Average Interest Rate Reduction	1.62%	2.54%
Weighted-Average Term Extension (in Months) | mo	72	55
Average amount capitalized as a result of a payment delay | $	$ 14,236	$ 19,276
Adjustable-rate
Loans in Mortgage Portfolio [Line Items]
Weighted-Average Interest Rate Reduction	1.62%	0.70%
Weighted-Average Term Extension (in Months) | mo	0	0
Average amount capitalized as a result of a payment delay | $	$ 14,608	$ 22,153
Other
Loans in Mortgage Portfolio [Line Items]
Weighted-Average Interest Rate Reduction	1.36%	1.80%
Weighted-Average Term Extension (in Months) | mo	189	187
Average amount capitalized as a result of a payment delay | $	$ 20,910	$ 22,773