Fair Value, Assets and Liabilities, Fair Value Option (Details) - Fair value option election [Member] - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans held for sale, carried at fair value	$ 13,155		$ 15,895
Loans held for sale, Aggregate unpaid principal	13,471		15,750
Loans held for sale, Fair value carrying amount less aggregate unpaid principal	(316)		$ 145
Loans held for sale [Member]
Fair Value Disclosures, Textual [Abstract]
Fair value option, changes in fair value, gain (loss)	$ (357)	$ 363

For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123596393&loc=d3e14172-108612

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

+ References

No definition available.

+ Details

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- Definition

Fair Value Disclosures, Textual [Abstract]

+ References

No definition available.

+ Details

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- Definition

This item represents the difference between the aggregate fair value and the aggregate unpaid principal balance of loans held for sale, for which the fair value option has been elected.

+ References

No definition available.

+ Details

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- Definition

For loans held for sale for which the fair value option has been elected, this item represents the aggregate unpaid principal balance.

+ References

No definition available.

+ Details

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