Mortgage Loans - Loan Restructuring - Financial Impacts (Details) - Single-family	12 Months Ended
	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	1.42%
Weighted-Average Term Extension (in Months) | mo	179
Average Amount Capitalized as a Result of a Payment Delay	$ 22,248
15-year or less, amortizing fixed-rate
Loans in Mortgage Portfolio [Line Items]
Weighted-Average Interest Rate Reduction	2.54%
Weighted-Average Term Extension (in Months) | mo	55
Average Amount Capitalized as a Result of a Payment Delay	$ 19,276
Adjustable-rate
Loans in Mortgage Portfolio [Line Items]
Weighted-Average Interest Rate Reduction	0.70%
Average Amount Capitalized as a Result of a Payment Delay	$ 22,153
Other
Loans in Mortgage Portfolio [Line Items]
Weighted-Average Interest Rate Reduction	1.80%
Weighted-Average Term Extension (in Months) | mo	187
Average Amount Capitalized as a Result of a Payment Delay	$ 22,773