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

SIGNIFICANT ACCOUNTING POLICIES - Loans and Leases (Details)

SIGNIFICANT ACCOUNTING POLICIES - Loans and Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Allowance for loan and lease losses	$ 2,121	$ 2,030	$ 1,814		$ 783
Retained earnings (accumulated deficit)	(3,419)	(2,202)
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Past Due [Line Items]
Allowance for loan and lease losses				$ 393
Retained earnings (accumulated deficit)				$ 306
Commercial portfolio
Financing Receivable, Past Due [Line Items]
Allowance for loan and lease losses	$ 1,424	1,462	1,236		552
Threshold period past due for nonperforming status	90 days
Threshold past due for write-off	90 days
Commercial real estate
Financing Receivable, Past Due [Line Items]
Threshold period past due for nonperforming status	90 days
Threshold past due for write-off	90 days
Home Equity \| First-lien home equity loan
Financing Receivable, Past Due [Line Items]
Threshold period past due for nonperforming status	150 days
Threshold past due for write-off	150 days
Home Equity \| Junior-lien home equity loan
Financing Receivable, Past Due [Line Items]
Threshold past due for write-off	120 days
Automobile
Financing Receivable, Past Due [Line Items]
Threshold past due for write-off	120 days
RV and marine
Financing Receivable, Past Due [Line Items]
Threshold past due for write-off	120 days
Residential Mortgage
Financing Receivable, Past Due [Line Items]
Threshold period past due for nonperforming status	150 days
Threshold past due for write-off	150 days
Other consumer
Financing Receivable, Past Due [Line Items]
Threshold past due for write-off	120 days
Consumer portfolio
Financing Receivable, Past Due [Line Items]
Allowance for loan and lease losses	$ 697	$ 568	$ 578		$ 231
Threshold past due for write-off	120 days