Quarterly report pursuant to Section 13 or 15(d)

LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - Loan and Lease Portfolio Composition (Details)

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LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - Loan and Lease Portfolio Composition (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Document Period End Date Jun. 30, 2019          
Commercial and industrial $ 30,608   $ 30,605      
Commercial real estate 6,888   6,842      
Automobile 12,173   12,429      
Home equity 9,419   9,722      
Residential mortgage 11,182   10,728      
Recreation Finance 3,492   3,254      
Other consumer 1,271   1,320      
Loans and leases [1] 75,033   74,900      
Allowance for loan and lease losses (774) $ (764) (772) $ (741) $ (721) $ (691)
Net loans and leases 74,259   74,128      
Consumer            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Automobile 12,173   12,429      
Home equity 9,418   9,720      
Residential mortgage 11,105   10,650      
Other consumer 1,271   1,320      
Allowance for loan and lease losses (214) (219) (230) (210) (206) (209)
Consumer | Automobile            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Loans and leases 12,173   12,429      
Consumer | Home Equity            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Loans and leases 9,419   9,722      
Consumer | Residential Mortgage            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Loans and leases 11,182   10,728      
Consumer | RV and Marine FInance            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Loans and leases 3,492   3,254      
Consumer | Other Consumer            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Loans and leases 1,271   1,320      
Commercial            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Commercial and industrial 30,608   30,605      
Commercial real estate 6,888   6,842      
Allowance for loan and lease losses (560) $ (545) (542) $ (531) $ (515) $ (482)
Commercial | Commercial and Industrial            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Loans and leases $ 30,608   $ 30,605      
[1] Amounts represent loans for which Huntington has elected the fair value option.