Huntington Bancshares Incorporated Annual report pursuant to Section 13 and 15(d)

ACQUISITION OF TCF FINANCIAL CORPORATION - Narrative (Details)

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ACQUISITION OF TCF FINANCIAL CORPORATION - Narrative (Details) $ in Millions					1 Months Ended	12 Months Ended
	Oct. 15, 2021 Rate	Jun. 09, 2021 USD ($)	Jun. 09, 2021 USD ($)	Jun. 09, 2021 USD ($) Rate	Sep. 30, 2021 USD ($) bankingCenter	Dec. 31, 2021 USD ($) Rate	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Business Acquisition [Line Items]
Goodwill						$ 5,349	$ 1,990
Noninterest expense						$ 4,375	$ 2,795	$ 2,721
Disposal Group, Held-for-sale, Not Discontinued Operations \| Branches Sold In Connection with Acquisition of TCF
Business Acquisition [Line Items]
Number of branches disposed \| bankingCenter					14
Deposits classified as held for sale					$ 847
Loans classified as held for sale					$ 209
Series C Non-Cumulative Perpetual Preferred Stock
Business Acquisition [Line Items]
Preferred stock, dividend rate percentage \| Rate	5.875%					5.875%
TCF Financial Corporation
Business Acquisition [Line Items]
Total consideration		$ 7,183
Goodwill		$ 3,359	$ 3,359	$ 3,359
TCF Financial Corporation \| Acquisition-related Costs
Business Acquisition [Line Items]
Noninterest expense						$ 701
TCF Financial Corporation \| Common Stock
Business Acquisition [Line Items]
Share issuance ratio			3.0028
TCF Financial Corporation \| Newly created series of preferred stock
Business Acquisition [Line Items]
Share issuance ratio			1
TCF Financial Corporation \| Core deposit intangible
Business Acquisition [Line Items]
Useful life						10 years
TCF Financial Corporation \| Series C Non-Cumulative Perpetual Preferred Stock
Business Acquisition [Line Items]
Preferred stock, dividend rate percentage			5.70%	5.70%

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