Commitments and Guarantees - Schedule Of Repurchase Agreements (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Fair value of indemnified securities financing	$ 367,214	$ 367,901
Fair value of cash and securities held by us, as agent, as collateral for indemnified securities financing	384,761	385,428
Fair value of collateral for indemnified securities financing invested in indemnified repurchase agreements	53,273	45,658
Fair value of cash and securities held by us or our agents as collateral for investments in indemnified repurchase agreements	$ 56,829	$ 48,887