Noninterest Revenue and Noninterest Expense - Noninterest Expense (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Noninterest Income (Expense) [Abstract]
Legal expense	$ 223	$ 121
FDIC-related expense	332
FDIC-related expense		(11)
Operating losses	$ 286	386
FDIC special assessment release		$ 323

Federal Deposit Insurance Corporation Premium Expense, Special Assessment

No definition available.

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- Definition

Federal Deposit Insurance Corporation Premium Income

+ References

No definition available.

+ Details

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- Definition

Noninterest Income (Expense) [Abstract]

+ References

No definition available.

+ Details

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- Definition

Other Noninterest Expense, Operating Losses

+ References

No definition available.

+ Details

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Namespace Prefix:	jpm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of expense for Federal Deposit Insurance Corporation (FDIC) insurance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(14))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1

+ Details

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Balance Type:	debit
Period Type:	duration

- Definition

Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(6))
-SubTopic 10
-Topic 220
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

+ Details

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Balance Type:	debit
Period Type:	duration