Interest Income and Interest Expense - Interest Income and Interest Expense (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Interest income and expense
Deposits with banks	$ (13)	$ 11	$ (9)	$ 234
Collateralized agreements	(220)	(67)	(651)	451
Trading assets	1,230	1,176	3,553	4,006
Investments	358	404	1,243	1,196
Loans	1,363	1,153	3,878	3,691
Other interest	399	255	1,096	1,138
Total interest income	3,117	2,932	9,110	10,716
Deposits	319	505	978	1,982
Collateralized financings	33	50	41	570
Trading liabilities	495	345	1,240	931
Short-term borrowings	115	124	433	423
Long-term borrowings	843	981	2,477	3,217
Other interest	(252)	(157)	(734)	252
Total interest expense	1,553	1,848	4,435	7,375
Net interest income	$ 1,564	$ 1,084	$ 4,675	$ 3,341

Interest expense securities sold under agreements to repurchase and securities loaned.

No definition available.

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- Definition

Interest income derived from the firm's loans receivable.

+ References

No definition available.

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- Definition

Interest income on deposits with banks.

+ References

No definition available.

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- Definition

Interest income on investments.

+ References

No definition available.

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- Definition

Fair value portion of assets pertaining to principal and customer trading transactions, or which may be incurred with the objective of generating a profit from short- term fluctuations in price as part of an entity's market-making and hedging in trading cash instruments and derivatives

+ References

No definition available.

+ Details

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- Definition

The aggregate interest income earned from securities borrowed, securities purchased under agreements to resell and federal funds sold.

+ References

No definition available.

+ Details

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- Definition

Interest expense on all other items not previously classified.

+ References

No definition available.

+ Details

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- Definition

Represents the total of interest and dividend income, including any amortization and accretion (as applicable) of discounts and premiums, earned from (1) loans and leases whether held-for-sale or held-in-portfolio; (2) investment securities; (3) federal funds sold; (4) securities purchased under agreements to resell; (5) investments in banker's acceptances, commercial paper, or certificates of deposit; (6) dividend income; or (7) other investments not otherwise specified herein.

+ References

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- Definition

Amount of the cost of borrowed funds accounted for as interest expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=124435984&loc=d3e28555-108399

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (210.5-03(11))
-URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.9)
-URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

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- Definition

Aggregate amount of interest expense on all deposits.

+ References

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- Definition

Aggregate amount of interest paid or due on all long-term debt.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.8)
-URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1402
-Paragraph (a)

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1402
-Paragraph (b)
-Subparagraph (1)

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- Definition

The aggregate interest expense incurred on short-term borrowings including commercial paper, Federal Home Loan Bank and Federal Reserve Bank advances and other short term borrowings.

+ References

+ Details

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- Definition

Interest expense incurred on short positions arising from sales of securities and other assets, which the entity does not own, to other parties. Trading liabilities includes the fair value of derivative contracts held for trading that are in loss positions.

+ References

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- Definition

The net amount of operating interest income (expense).

+ References

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- References

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- Definition

Amount, after discount, accretion and premium amortization, of interest income and dividend income classified as other.

+ References

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