Investments in Securities - Trading 1 (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Schedule of Investments in Trading Securities [Line Items]
Trading, at fair value	$ 51,288	$ 50,129
Mortgage-related
Schedule of Investments in Trading Securities [Line Items]
Trading, at fair value	2,634	3,211
Non-mortgage-related securities
Schedule of Investments in Trading Securities [Line Items]
Trading, at fair value	48,654	46,918
Non-mortgage-related securities | Pledged as collateral
Schedule of Investments in Trading Securities [Line Items]
Trading, at fair value	5,100	3,900
Consolidated trusts | Mortgage-related
Schedule of Investments in Trading Securities [Line Items]
Trading, at fair value	$ 375	$ 427