Mortgage Loans - Credit Quality Indicators - MF (Details) - Multifamily - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
2022	$ 25,484	$ 59,007
2021	66,450	80,197
2020	78,311	66,566
2019	64,250	57,666
2018	54,194	48,128
Prior	129,164	94,641
Total mortgage loans	417,853	406,205
Total mortgage loans (Less than in 2021)	417,853	406,205
Non-classified
Financing Receivable, Credit Quality Indicator [Line Items]
2022	25,484	58,986
2021	66,316	79,602
2020	77,400	64,278
2019	61,574	55,552
2018	52,228	44,037
Prior	116,500	87,549
Total mortgage loans	399,502	390,004
Total mortgage loans (Less than in 2021)	399,502	390,004
Classified
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0	21
2021	134	595
2020	911	2,288
2019	2,676	2,114
2018	1,966	4,091
Prior	12,664	7,092
Total mortgage loans	18,351	16,201
Total mortgage loans (Less than in 2021)	18,351	16,201
Substandard or doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total mortgage loans	37	1
Total mortgage loans (Less than in 2021)	$ 37	$ 1

Amount of financing receivable originated more than five years prior to current fiscal year.

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Amount of financing receivable originated three years prior to current fiscal year.

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