XML 110 R86.htm IDEA: XBRL DOCUMENT
v3.22.4

Borrowings (Schedule of Long-Term Borrowings) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Sep. 30, 2021
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Long-term borrowings | $ 2,284 | $ 2,407 |
Senior Notes [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 1.80%
Parent Company [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term borrowings | 1,786 | 1,909 |
Parent Company [Member] | Senior Notes [Member] | Two Point Two Five Percent Senior Notes Due April Two Thousand Twenty Five [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term borrowings | $ 747 | 746 |
Debt Instrument, Interest Rate, Stated Percentage | 2.25% |  |
Parent Company [Member] | Senior Notes [Member] | One point Eight Percent Senior Notes Due August Two Thousand |  |  |
Debt Instrument [Line Items] |  |  |
Long-term borrowings | $ 646 | 645 |
Debt Instrument, Interest Rate, Stated Percentage | 1.80% |  |
Parent Company [Member] | Subordinated Debt [Member] | Seven Point Seven Five Percent Subordinated Notes Due September Two Thousand Twenty Four [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term borrowings | $ 100 | 100 |
Debt Instrument, Interest Rate, Stated Percentage | 7.75% |  |
Parent Company [Member] | Subordinated Debt [Member] | Six Point Seven Five Percent Subordinated Debentures Due November Two Thousand Twenty Five [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term borrowings | $ 153 | 154 |
Debt Instrument, Interest Rate, Stated Percentage | 6.75% |  |
Parent Company [Member] | Subordinated Debt [Member] | Seven Point Three Seven Five Percent Subordinated Notes Due December Two Thousand Thirty Seven [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term borrowings | $ 298 | 298 |
Debt Instrument, Interest Rate, Stated Percentage | 7.375% |  |
Parent Company [Member] | Valuation Adjustments On Hedged Long Term Debt [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term borrowings | $ (158) | (34) |
Regions Bank [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term borrowings | 498 | 498 |
Regions Bank [Member] | Subordinated Debt [Member] | Six Point Four Five Percent Subordinated Notes Due June Two Thousand Thirty Seven [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term borrowings | $ 496 | 496 |
Debt Instrument, Interest Rate, Stated Percentage | 6.45% |  |
Regions Bank [Member] | Other Long Term Debt [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term borrowings | $ 2 | $ 2 |

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI https://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69C -URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69B -URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1D -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=srt_ParentCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=rf_TwoPointTwoFivePercentSeniorNotesDueMayTwoThousandTwentyFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=rf_OnePointEightPercentSeniorNotesDueAugustTwoThousandTwentyEightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SubordinatedDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=rf_SevenPointSevenFivePercentSubordinatedNotesDueSeptemberTwoThousandTwentyFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=rf_SixPointSevenFivePercentSubordinatedDebenturesDueNovemberTwoThousandTwentyFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=rf_SevenPointThreeSevenFivePercentSubordinatedNotesDueDecemberTwoThousandThirtySevenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=rf_ValuationAdjustmentsOnHedgedLongTermDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=srt_SubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=rf_SixPointFourFivePercentSubordinatedNotesDueJuneTwoThousandThirtySevenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_OtherLongTermInvestmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |