Loans - Consumer, Excluding Credit Card Loan Portfolio, Residential Real Estate, Nature and Extent of TDRs (Details) - Consumer, excluding credit card - Residential real estate $ in Millions	12 Months Ended
Dec. 31, 2022 USD ($) loan
Financing Receivable, Impaired [Line Items]
New TDRs \| $	$ 362
Percentage, sum of items by type, may exceed	100.00%
Trial Modification
Financing Receivable, Impaired [Line Items]
Number of loans modified	3,902
Permanent Modification
Financing Receivable, Impaired [Line Items]
Number of loans modified	4,182
Interest rate reduction
Financing Receivable, Impaired [Line Items]
Concession granted	54.00%
Term or payment extension
Financing Receivable, Impaired [Line Items]
Concession granted	67.00%
Principal and/or interest deferred
Financing Receivable, Impaired [Line Items]
Concession granted	10.00%
Principal forgiveness
Financing Receivable, Impaired [Line Items]
Concession granted	1.00%
Other
Financing Receivable, Impaired [Line Items]
Concession granted	37.00%

Financing Receivable, Modifications, Percentage of Modifications

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- Definition

In a group of items by type, the percentage that the sum of the items may exceed due to the inclusion of some items in more than one category. For example, in loan modifications, some loans may have more than one type of concession granted on the loan, so a sum of all types of loan modifications granted would exceed 100%.

+ References

No definition available.

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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.

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- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

+ References

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- Definition

Amortized cost of financing receivable modified during period for debtor experiencing financial difficulty.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 33
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-33

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 12A
-Publisher FASB
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
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-Paragraph 42
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-Publisher FASB
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