Noninterest Revenue and Noninterest Expense - Other Income (Details) - USD ($) $ in Millions		12 Months Ended
Jan. 31, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Schedule of Non interest Revenue [Line Items]
Operating lease income		$ 3,803	$ 2,795	$ 2,843
Losses on tax-oriented investments		(173)	(97)	(1,538)
Gain on Visa shares		0	7,990	0
First Republic-related gains	$ 588	628
First Republic-related gains		0	103	2,775
Gain related to the acquisition of CIFM		$ 0	$ 0	$ 339
Business Combination, Bargain Purchase, Gain, Statement of Income or Comprehensive Income [Extensible Enumeration]			Other income	Other income
Business Combination, Achieved in Stages, Preacquisition Equity Interest in Acquiree, Remeasurement, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]				Other income
Payment related to business acquisition	$ 609
CIFM
Schedule of Non interest Revenue [Line Items]
Percentage interest acquired				51.00%

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Gain (Loss) On Business Combination After Measurement Period

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Losses On Tax-Oriented Investments

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Percentage of voting equity interest acquired in business combination.

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Indicates line item in statement of income or comprehensive income that includes gain (loss) from remeasurement of acquisition-date fair value of equity interest in acquiree held by acquirer immediately before acquisition date in business combination achieved in stages.

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In a business combination in which the amount of net identifiable assets acquired and liabilities assumed exceeds the aggregate consideration transferred or to be transferred (as defined), this element represents the amount of gain recognized by the entity.

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Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable.

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