Mortgage Loans - Loan Restructuring - Financial Impacts (Details) - Single-family	3 Months Ended	6 Months Ended
	Jun. 30, 2022 USD ($) mo	Jun. 30, 2022 USD ($) mo
20- and 30-year or more, amortizing fixed-rate
Loans in Mortgage Portfolio [Line Items]
Weighted-Average Interest Rate Reduction	1.45%	1.52%
Weighted-Average Term Extension (in Months) | mo	180	179
Average Amount Capitalized as a Result of a Payment Delay	$ 22,997	$ 23,372
15-year or less, amortizing fixed-rate
Loans in Mortgage Portfolio [Line Items]
Weighted-Average Interest Rate Reduction	1.88%	2.69%
Weighted-Average Term Extension (in Months) | mo	51	61
Average Amount Capitalized as a Result of a Payment Delay	$ 18,394	$ 20,361
Adjustable-rate
Loans in Mortgage Portfolio [Line Items]
Weighted-Average Interest Rate Reduction	0.78%	0.53%
Average Amount Capitalized as a Result of a Payment Delay	$ 19,528	$ 23,406
Other
Loans in Mortgage Portfolio [Line Items]
Weighted-Average Interest Rate Reduction	1.81%	1.87%
Weighted-Average Term Extension (in Months) | mo	183	185
Average Amount Capitalized as a Result of a Payment Delay	$ 22,666	$ 24,310