XML 97 R73.htm IDEA: XBRL DOCUMENT
v3.22.4

Allowance For Credit Losses (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2022 | Dec. 31, 2022 | Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivable, Nonaccrual, No Allowance |  | $ 151 | $ 127
Commercial Portfolio Segment [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivable, Nonaccrual, No Allowance |  | $ 151 |
Consumer Unsecured Loans sold in period |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivables, book balance sold in period | $ 1,200 |  |
Allowance for loan losses, related to loans sold prior to sale | 94 |  |
Financing Receiable, Allowance for Credit loss, writeoff on loans sold | 63 |  |
Allowance for Loan and Lease Losses, Loans Sold | $ 31 |  |
Minimum [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing period for consumer loans, in years |  | 15 years |
Maximum [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing period for consumer loans, in years |  | 30 years |

X
- Definition Allowance for loan losses, related to loans sold prior to sale + References No definition available. + Details
Name: | rf_AllowanceForLoanLossesRelatedToLoansSoldPriorToSale
Namespace Prefix: | rf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Financing Period For Consumer Loan Portfolio Segment + References No definition available. + Details
Name: | rf_FinancingPeriodForConsumerLoanPortfolioSegment
Namespace Prefix: | rf_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Financing Receiable, Allowance for Credit loss, writeoff on loans sold + References No definition available. + Details
Name: | rf_FinancingReceiableAllowanceForCreditLossWriteoffOnLoansSold
Namespace Prefix: | rf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Financing Receivables, book balance sold in period + References No definition available. + Details
Name: | rf_FinancingReceivablesBookBalanceSoldInPeriod
Namespace Prefix: | rf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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
Name: | us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of reduction of allowance reserve for credit loss arising from sale of loan and lease portfolios. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524 + Details
Name: | us-gaap_AllowanceForLoanAndLeaseLossesLoansSold
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amortized cost 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
Name: | us-gaap_FinancingReceivableNonaccrualNoAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rf_ConsumerUnsecuredLoansSoldInPeriodMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |