Commitments and Guarantees - Schedule Of Repurchase Agreements (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Fair value of indemnified securities financing	$ 376,975	$ 367,901
Fair value of cash and securities held by us, as agent, as collateral for indemnified securities financing	397,797	385,428
Fair value of collateral for indemnified securities financing invested in indemnified repurchase agreements	46,030	45,658
Fair value of cash and securities held by us or our agents as collateral for investments in indemnified repurchase agreements	$ 49,255	$ 48,887