Loans - Wholesale Loan Portfolio, Nonaccrual Loans (Details) - Wholesale - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Nonaccrual [Line Items]
With an allowance	$ 1,345	$ 1,144
Without an allowance	618	910
Total nonaccrual loans	1,963	2,054
Secured by real estate
Financing Receivable, Nonaccrual [Line Items]
With an allowance	172	254
Without an allowance	74	72
Total nonaccrual loans	246	326
Commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
With an allowance	686	604
Without an allowance	332	365
Total nonaccrual loans	1,018	969
Other
Financing Receivable, Nonaccrual [Line Items]
With an allowance	487	286
Without an allowance	212	473
Total nonaccrual loans	$ 699	$ 759

Financing Receivable, Excluding Accrued Interest, Nonaccrual, With Related Allowance

No definition available.

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

Amortized cost excluding accrued interest, of financing receivable on nonaccrual status. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 16
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919258-210447

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost excluding accrued interest, of financing receivable on nonaccrual status with no allowance for credit loss. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 16
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919258-210447

+ 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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- Details

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