Pledged Assets and Collateral, Pledged Assets (Details) - USD ($) $ in Millions	Sep. 30, 2022		Dec. 31, 2021		Sep. 30, 2021
Security Owned and Pledged as Collateral, Fair Value [Abstract]
Assets	$ 1,877,745	[1]	$ 1,948,068	[1]	$ 1,954,901
Equity securities, carried at fair value	24,698		39,098
Available-for-sale debt securities	115,835		177,244
Held-to-maturity debt securities	300,434		272,022
Equity securities	59,560		72,886
VIEs that we consolidate [Member]
Security Owned and Pledged as Collateral, Fair Value [Abstract]
Assets	7,140		7,529
Carrying value [Member]
Security Owned and Pledged as Collateral, Fair Value [Abstract]
Held-to-maturity debt securities	300,434		272,022
Carrying value [Member] | VIEs that we consolidate [Member]
Security Owned and Pledged as Collateral, Fair Value [Abstract]
Assets	4,800		4,800
Related to trading activities [Member]
Security Owned and Pledged as Collateral, Fair Value [Abstract]
Off-balance sheet repledged third-party owned debt and equity securities	36,282		31,087
Asset Pledged as Collateral [Member]
Security Owned and Pledged as Collateral, Fair Value [Abstract]
Assets	459,054		420,516
Loans eligible for repurchase from GNMA securitizations	348		109
Asset Pledged as Collateral [Member] | Carrying value [Member] | VIEs that we consolidate [Member]
Security Owned and Pledged as Collateral, Fair Value [Abstract]
Assets	4,828		4,781
Asset Pledged as Collateral [Member] | Carrying value [Member] | Total VIEs and Transfers that we account for as secured borrowings [Member]
Security Owned and Pledged as Collateral, Fair Value [Abstract]
Assets	5,176		4,890
Asset Pledged as Collateral [Member] | Related to non-trading activities [Member]
Security Owned and Pledged as Collateral, Fair Value [Abstract]
Assets	386,407		369,339
Available-for-sale debt securities	52,961		65,198
Held-to-maturity debt securities	10,973		13,843
Asset Pledged as Collateral [Member] | Loans receivable [Member] | Related to non-trading activities [Member]
Security Owned and Pledged as Collateral, Fair Value [Abstract]
Assets	322,237		288,698
Asset Pledged as Collateral [Member] | Other financial assets [Member] | Related to non-trading activities [Member]
Security Owned and Pledged as Collateral, Fair Value [Abstract]
Equity securities	236		1,600
Asset Pledged as Collateral with Right [Member] | Related to trading activities [Member]
Security Owned and Pledged as Collateral, Fair Value [Abstract]
Assets	67,471		46,287
Equity securities, carried at fair value	2,502		984
Asset Pledged as Collateral with Right [Member] | Trading debt securities and other [Member]
Security Owned and Pledged as Collateral, Fair Value [Abstract]
Assets	$ 28,687		$ 14,216

[1] Our consolidated assets at September 30, 2022, and December 31, 2021, included the following assets of certain variable interest entities (VIEs) that can only be used to settle the liabilities of those VIEs: Debt securities, $71 million and $71 million; Loans, $4.6 billion and $4.5 billion; All other assets, $172 million and $234 million; and Total assets, $4.8 billion and $4.8 billion, respectively.