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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Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

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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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Intangible Assets (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Amortized intangible assets:
Gross carrying value	$ 8,148	$ 20,989
Accumulated amortization	(6,213)	(19,001)
Net carrying value	1,935	1,988
Unamortized intangible assets:
Mortgage servicing rights	13,336	14,649
Goodwill	26,420	26,418	$ 26,445	$ 26,587
Trademark	14	14
MSRs [Member]
Amortized intangible assets:
Gross carrying value	4,211	4,161
Accumulated amortization	(2,784)	(2,718)
Net carrying value	1,427	1,443
Core deposit intangibles [Member]
Amortized intangible assets:
Gross carrying value	0	12,834
Accumulated amortization	0	(12,834)
Net carrying value	0	0
Customer relationship and other intangibles [Member]
Amortized intangible assets:
Gross carrying value	3,937	3,994
Accumulated amortization	(3,429)	(3,449)
Net carrying value	$ 508	$ 545