Securities Financing Activities - Types of Financial Assets Pledged and Remaining Maturity (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Securities Financing Transaction [Line Items]
Securities sold under repurchase agreements	$ 533,390	$ 578,060
Securities loaned and other	52,735	41,366
Overnight and continuous
Securities Financing Transaction [Line Items]
Securities sold under repurchase agreements	223,354	238,667
Securities loaned and other	51,764	37,887
Up to 30 days
Securities Financing Transaction [Line Items]
Securities sold under repurchase agreements	201,325	230,980
Securities loaned and other	76	1,647
30 – 90 days
Securities Financing Transaction [Line Items]
Securities sold under repurchase agreements	40,302	70,777
Securities loaned and other	0	500
Greater than 90 days
Securities Financing Transaction [Line Items]
Securities sold under repurchase agreements	68,409	37,636
Securities loaned and other	895	1,332
Mortgage-backed securities, U.S. GSEs and government agencies
Securities Financing Transaction [Line Items]
Securities sold under repurchase agreements	21,919	56,744
Securities loaned and other	0	0
Mortgage-backed securities, Residential - nonagency
Securities Financing Transaction [Line Items]
Securities sold under repurchase agreements	722	1,016
Securities loaned and other	0	0
Mortgage-backed securities, Commercial - nonagency
Securities Financing Transaction [Line Items]
Securities sold under repurchase agreements	1,065	855
Securities loaned and other	0	0
U.S. Treasury, GSEs and government agencies
Securities Financing Transaction [Line Items]
Securities sold under repurchase agreements	280,004	315,834
Securities loaned and other	230	143
Obligations of U.S. states and municipalities
Securities Financing Transaction [Line Items]
Securities sold under repurchase agreements	1,726	1,525
Securities loaned and other	8	2
Non-U.S. government debt
Securities Financing Transaction [Line Items]
Securities sold under repurchase agreements	155,164	157,563
Securities loaned and other	2,021	1,730
Corporate debt securities
Securities Financing Transaction [Line Items]
Securities sold under repurchase agreements	35,682	22,849
Securities loaned and other	1,325	1,864
Asset-backed securities
Securities Financing Transaction [Line Items]
Securities sold under repurchase agreements	703	694
Securities loaned and other	0	0
Equity securities
Securities Financing Transaction [Line Items]
Securities sold under repurchase agreements	36,405	20,980
Securities loaned and other	$ 49,151	$ 37,627

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- Definition

Amount, before effects of master netting arrangements, of securities loaned to entities in exchange for collateral. Includes liabilities not subject to a master netting arrangement and elected not to be offset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

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Amount, before effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement and elected not to be offset.

+ References

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