Loans - Wholesale Loan Portfolio, Loan Modifications, Narrative (Details) - Wholesale - USD ($)	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Financing Receivable, Troubled Debt Restructuring [Line Items]
Carrying value of new TDRs		$ 418,000,000
Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Additional commitments to lend to borrowers whose loans have been modified as FDM's	$ 909,000,000
Amortized cost of modified loans	373,000,000
Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Additional commitments to lend to borrowers whose loans have been modified as FDM's	0
Amortized cost of modified loans	$ 63,000,000
Weighted-average term loan extensions	4 months
Secured by real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Additional commitments to lend to borrowers whose loans have been modified as FDM's	$ 0
Amortized cost of modified loans	$ 0

Financing Receivable, Excluding Accrued Interest, Modified Period

No definition available.

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- Definition

Financing Receivable, Modified, Weighted Average Term Increase From Modification

+ References

No definition available.

+ 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.

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- Definition

Amount, after troubled debt restructuring, of modified financing receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524

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- Definition

Amount of unfunded portion of contractual agreement to lend funds to borrower for financing receivable modified as troubled debt restructuring.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=121585226&loc=d3e18794-111554

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