XML 135 R117.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Income Taxes (Summary Of Detail Of Tax Carryforwards) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Income Tax Contingency [Line Items] |  |
Deferred Tax Assets, Operating Loss Carryforwards, State and Local | $ 31 | $ 40
Operating Loss Carryforwards, Valuation Allowance | (19) | (21)
Deferred Tax Assets, Net of Valuation Allowance | 1,637 | $ 1,802
Total Net Operating Losses [Member] |  |
Income Tax Contingency [Line Items] |  |
Deferred Tax Assets, Net of Valuation Allowance | 12 |
Net Operating Losses Federal Date Range 2 |  |
Income Tax Contingency [Line Items] |  |
Deferred Tax Assets, Operating Loss Carryforwards, Domestic | 9 |
Operating Loss Carryforwards, Valuation Allowance | 0 |
Deferred Tax Assets, Net of Valuation Allowance | 9 |
Net Operating Losses States Date Range One [Member] |  |
Income Tax Contingency [Line Items] |  |
Deferred Tax Assets, Operating Loss Carryforwards, State and Local | 13 |
Operating Loss Carryforwards, Valuation Allowance | (13) |
Deferred Tax Assets, Net of Valuation Allowance | 0 |
Net Operating Losses States Date Range Two [Member] |  |
Income Tax Contingency [Line Items] |  |
Deferred Tax Assets, Operating Loss Carryforwards, State and Local | 3 |
Operating Loss Carryforwards, Valuation Allowance | (2) |
Deferred Tax Assets, Net of Valuation Allowance | 1 |
Net Operating Losses States Date Range Three [Member] |  |
Income Tax Contingency [Line Items] |  |
Deferred Tax Assets, Operating Loss Carryforwards, State and Local | 3 |
Operating Loss Carryforwards, Valuation Allowance | (2) |
Deferred Tax Assets, Net of Valuation Allowance | 1 |
Other Credits States Date Range One [Member] |  |
Income Tax Contingency [Line Items] |  |
Deferred Tax Assets, Operating Loss Carryforwards, State and Local | 3 |
Operating Loss Carryforwards, Valuation Allowance | (2) |
Deferred Tax Assets, Net of Valuation Allowance | $ 1 |

X
- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-2 + Details
Name: | us-gaap_DeferredTaxAssetsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-6 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-8 + Details
Name: | us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible state and local operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-6 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-8 + Details
Name: | us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_IncomeTaxContingencyLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-2 + Details
Name: | us-gaap_OperatingLossCarryforwardsValuationAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_TaxCreditCarryforwardAxis=rf_TotalNetOperatingLossesCarryforwardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=rf_NetOperatingLossesFederalDateRange2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=rf_NetOperatingLossesStatesDateRangeOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=rf_NetOperatingLossesStatesDateRangeTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=rf_NetOperatingLossesStatesDateRangeThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=rf_NetOperatingLossesStatesnoexpirationDomain
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |