Mortgage Loans - Loan Restructuring - Financial Impacts (Details) - Single-family	3 Months Ended	9 Months Ended
	Sep. 30, 2022 USD ($) mo	Sep. 30, 2022 USD ($) mo
20- and 30-year or more, amortizing fixed-rate
Loans in Mortgage Portfolio [Line Items]
Weighted-Average Interest Rate Reduction	1.18%	1.45%
Weighted-Average Term Extension (in Months) | mo	179	179
Average Amount Capitalized as a Result of a Payment Delay	$ 20,896	$ 22,862
15-year or less, amortizing fixed-rate
Loans in Mortgage Portfolio [Line Items]
Weighted-Average Interest Rate Reduction	1.88%	2.31%
Weighted-Average Term Extension (in Months) | mo	45	52
Average Amount Capitalized as a Result of a Payment Delay	$ 16,950	$ 19,872
Adjustable-rate
Loans in Mortgage Portfolio [Line Items]
Weighted-Average Interest Rate Reduction	1.47%	0.82%
Average Amount Capitalized as a Result of a Payment Delay	$ 22,079	$ 23,065
Other
Loans in Mortgage Portfolio [Line Items]
Weighted-Average Interest Rate Reduction	1.66%	1.82%
Weighted-Average Term Extension (in Months) | mo	192	184
Average Amount Capitalized as a Result of a Payment Delay	$ 21,042	$ 23,776