Share-Based Payment Arrangement, Non Option Equity Instruments, Grant-Date Fair Value Range, Lower Range Limit

No definition available.

Name:	fitb_ShareBasedPaymentArrangementNonOptionEquityInstrumentsGrantDateFairValueRangeLowerRangeLimit
Namespace Prefix:	fitb_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Share-Based Payment Arrangement, Non Option Equity Instruments, Grant-Date Fair Value Range, Upper Range Limit

+ References

No definition available.

+ Details

Name:	fitb_ShareBasedPaymentArrangementNonOptionEquityInstrumentsGrantDateFairValueRangeUpperRangeLimit
Namespace Prefix:	fitb_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(ii)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)(1)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=fitb_ExercisePriceRangeUnder25Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=fitb_Range2530Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=fitb_Range3035Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=fitb_Range3540Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=fitb_Range4045Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=fitb_PriceRange4501AndOverMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Stock-Based Compensation - Outstanding RSUs by Grant-Date Fair Value (Details) - RSUs - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award
Number of shares/units outstanding (in shares)	9,906	9,487	9,466	10,006
Weighted-Average Remaining Contractual Life (in years)	1 year 1 month 6 days
Under $25.00
Share-based Compensation Arrangement by Share-based Payment Award
Grant-date fair value range, upper limit (in usd per share)	$ 25.00
Number of shares/units outstanding (in shares)	431
Weighted-Average Remaining Contractual Life (in years)	2 months 12 days
$25.01-$30.00
Share-based Compensation Arrangement by Share-based Payment Award
Grant-date fair value range, lower limit (in usd per share)	$ 25.01
Grant-date fair value range, upper limit (in usd per share)	$ 30.00
Number of shares/units outstanding (in shares)	2,249
Weighted-Average Remaining Contractual Life (in years)	4 months 24 days
$30.01-$35.00
Share-based Compensation Arrangement by Share-based Payment Award
Grant-date fair value range, lower limit (in usd per share)	$ 30.01
Grant-date fair value range, upper limit (in usd per share)	$ 35.00
Number of shares/units outstanding (in shares)	2,471
Weighted-Average Remaining Contractual Life (in years)	1 year 2 months 12 days
$35.01-$40.00
Share-based Compensation Arrangement by Share-based Payment Award
Grant-date fair value range, lower limit (in usd per share)	$ 35.01
Grant-date fair value range, upper limit (in usd per share)	$ 40.00
Number of shares/units outstanding (in shares)	1,021
Weighted-Average Remaining Contractual Life (in years)	1 year 3 months 18 days
$40.01-$45.00
Share-based Compensation Arrangement by Share-based Payment Award
Grant-date fair value range, lower limit (in usd per share)	$ 40.01
Grant-date fair value range, upper limit (in usd per share)	$ 45.00
Number of shares/units outstanding (in shares)	165
Weighted-Average Remaining Contractual Life (in years)	1 year 10 months 24 days
$45.01 and over
Share-based Compensation Arrangement by Share-based Payment Award
Grant-date fair value range, lower limit (in usd per share)	$ 45.01
Number of shares/units outstanding (in shares)	3,569
Weighted-Average Remaining Contractual Life (in years)	1 year 7 months 6 days