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Loans and Leases - Schedule Of Troubled Debt Restructurings Within The Previous 12 Months (Details) $ in Millions | 3 Months Ended
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Mar. 31, 2021 USD ($) loan | Mar. 31, 2020 USD ($) loan
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number | loan | 11 | 16
Recorded Investment | $ | $ 3 | $ 1
Consumer | Consumer Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number | loan | 4 | 9
Recorded Investment | $ | $ 2 | $ 1
Consumer | Credit Card and Other |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number | loan | 0 | 7
Recorded Investment | $ | $ 0 | $ 0
C&I | Commercial | Commercial and industrial |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number | loan | 7 | 0
Recorded Investment | $ | $ 1 | $ 0
CRE | Commercial | Consumer Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number | loan | 0 | 0
Recorded Investment | $ | $ 0 | $ 0
HELOC | Consumer | Consumer Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number | loan | 1 | 4
Recorded Investment | $ | $ 0 | $ 1
R/E Installment Loans | Consumer | Consumer Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number | loan | 3 | 5
Recorded Investment | $ | $ 2 | $ 0

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- Definition Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953682-111524 + Details
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