XML 123 R110.htm IDEA: XBRL DOCUMENT
v3.25.1

Business Segments - Schedule of Movements Between Segments (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Segment Reporting Information |  |  |  |  |
Net interest income (FTE) | $ 1,442 | $ 1,390 |  |  |
Income before income taxes (FTE) | 658 | 664 |  |  |
Average assets | 210,558 | 213,203 |  |  |
Operating Segments | Consumer and Small Business Banking |  |  |  |  |
Segment Reporting Information |  |  |  |  |
Net interest income (FTE) | 975 | 1,152 |  |  |
Income before income taxes (FTE) | 522 | 685 |  |  |
Average assets | $ 54,406 | $ 51,363 |  |  |
Operating Segments | Consumer and Small Business Banking | Scenario, Adjustment |  |  |  |  |
Segment Reporting Information |  |  |  |  |
Net interest income (FTE) |  |  | $ 103 | $ 135 | $ 74
Income before income taxes (FTE) |  |  | 68 | 105 | 43
Average assets |  |  | $ 714 | $ 686 | $ 660

X
- Definition Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest, Including FTE Adjustments + References No definition available. + Details
Name: | fitb_IncomeLossFromContinuingOperationsBeforeIncomeTaxesNoncontrollingInterestIncludingFTEAdjustments
Namespace Prefix: | fitb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Interest Income (Expense), Operating, Including FTE Adjustments + References No definition available. + Details
Name: | fitb_InterestIncomeExpenseOperatingIncludingFTEAdjustments
Namespace Prefix: | fitb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Average amount outstanding of interest-earning and noninterest-earning assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1402 -Paragraph a -Publisher SEC + Details
Name: | us-gaap_AssetsAverageOutstanding
Namespace Prefix: | us-gaap_
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_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=fitb_ConsumerAndSmallBusinessBankingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=us-gaap_ScenarioAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |