Debt Instrument, Redemption Period Prior To Maturity Date

No definition available.

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Namespace Prefix:	fitb_
Data Type:	xbrli:durationItemType
Balance Type:	na
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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: 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 http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- 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

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph e
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Period Type:	duration

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- Details

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- Details

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Long-Term Debt - Senior Notes (Details) - USD ($)	May 05, 2020	Oct. 28, 2019	Jan. 25, 2019	Jun. 05, 2018	Mar. 14, 2018	Jun. 15, 2017	Mar. 07, 2012	Dec. 31, 2020
Debt Instrument
Principal amount								$ 1,370,000,000
Parent Company \| Senior Notes \| Fixed Rate 3.50% Due 2022
Debt Instrument
Principal amount							$ 500,000,000
Interest rate							3.50%	3.50%
Redemption period prior to maturity date							30 days
Redemption price percentage							100.00%
Parent Company \| Senior Notes \| Fixed Rate 2.60% Notes Due 2022
Debt Instrument
Principal amount						$ 700,000,000
Interest rate						2.60%		2.60%
Redemption period prior to maturity date						30 days
Redemption price percentage						100.00%
Parent Company \| Senior Notes \| Fixed Rate 3.95% Notes Due 2028
Debt Instrument
Principal amount					$ 650,000,000
Interest rate					3.95%			3.95%
Redemption period prior to maturity date					30 days
Redemption price percentage					100.00%
Parent Company \| Senior Notes \| Floating Rate 0.70 Percent Notes Due 2021
Debt Instrument
Principal amount				$ 250,000,000
Interest rate								0.70%
Redemption period prior to maturity date				30 days
Redemption price percentage				100.00%
Parent Company \| Senior Notes \| Floating Rate 0.70 Percent Notes Due 2021 \| LIBOR
Debt Instrument
Basis spread on variable rate (as a percent)				0.47%
Parent Company \| Senior Notes \| Fixed Rate 3.65 Percent Notes Due 2024
Debt Instrument
Principal amount			$ 1,500,000,000
Interest rate			3.65%
Redemption period prior to maturity date			30 days
Redemption price percentage			100.00%
Parent Company \| Senior Notes \| Fixed Rate 2.375% Notes Due 2025
Debt Instrument
Principal amount		$ 750,000,000
Interest rate		2.375%						2.375%
Redemption period prior to maturity date		30 days
Redemption price percentage		100.00%
Parent Company \| Senior Notes \| Fixed Rate 2.375% Notes Due 2025 \| U.S. Treasury Rate
Debt Instrument
Basis spread on variable rate (as a percent)		0.15%
Parent Company \| Senior Notes \| Fixed Rate 1.625% and 2.55% Notes
Debt Instrument
Principal amount	$ 1,250,000,000
Parent Company \| Senior Notes \| Fixed Rate 1.625% Notes Due 2023
Debt Instrument
Principal amount	$ 500,000,000
Interest rate	1.625%							1.625%
Redemption price percentage	100.00%
Debt term	3 years
Parent Company \| Senior Notes \| Fixed Rate 1.625% Notes Due 2023 \| U.S. Treasury Rate
Debt Instrument
Basis spread on variable rate (as a percent)	0.25%
Parent Company \| Senior Notes \| Fixed Rate 2.55% Notes Due 2027
Debt Instrument
Principal amount	$ 750,000,000
Interest rate	2.55%							2.55%
Redemption price percentage	100.00%
Debt term	7 years
Parent Company \| Senior Notes \| Fixed Rate 2.55% Notes Due 2027 \| U.S. Treasury Rate
Debt Instrument
Basis spread on variable rate (as a percent)	0.35%