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Loans and Leases - Financial Effect of TDRs (Details) - Mortgage Loans: - Commercial real estate $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($) loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	1
Pre- Modification Recorded Investment	$ 22
Post- Modification Recorded Investment	$ 19
Interest rate reduction, weighted-average contractual interest rate, prior to modification	6.00%
Interest rate reduction, weighted-average contractual interest rate, after modification	4.00%
Charge- off Amount	$ 3
Capitalized Interest	$ 0

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- Definition

Financing Receivable, Modified, Weighted Average Interest Rate After Modification

+ References

No definition available.

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- Definition

Financing Receivable, Modified, Weighted Average Interest Rate Prior To Modification

+ References

No definition available.

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- Definition

Financing Receivable, Troubled Debt Restructuring, Capitalized Interest

+ References

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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

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, 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, before troubled debt restructuring, of financing receivable to be modified.

+ 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

Reflects the amount of the write-down related to a troubled debt restructuring.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI https://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554

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