Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

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Reflects the estimated amount of impairment as of the balance sheet date of recognized servicing assets that are being amortized in proportion to and over the period of estimated net servicing income or loss.

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Intangible Assets (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Amortized intangible assets:
Gross carrying value	$ 5,580	$ 5,636
Accumulated amortization	(4,142)	(4,156)
Net carrying value	1,438	1,480
Unamortized intangible assets:
Goodwill	25,181	25,180	$ 26,290	$ 26,392
Residential mortgage servicing rights [Member]
Unamortized intangible assets:
Mortgage servicing rights, carried at fair value	8,511	6,920	$ 7,536	$ 6,125
Amortized [Member] \| Commercial mortgage servicing [Member]
Finite-Lived Intangible Assets [Line Items]
MSR Valuation allowance		4
MSRs [Member]
Amortized intangible assets:
Gross carrying value	4,826	4,794
Accumulated amortization	(3,584)	(3,525)
Net carrying value	1,242	1,269
Customer relationship and other intangibles [Member]
Amortized intangible assets:
Gross carrying value	754	842
Accumulated amortization	(558)	(631)
Net carrying value	$ 196	$ 211