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
Mar. 31, 2019
Dec. 31, 2018
Mar. 31, 2018
Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Commercial and industrial $ 30,972 $ 30,605    
Commercial real estate 6,795 6,842    
Automobile 12,272 12,429    
Home equity 9,551 9,722    
Residential mortgage 10,885 10,728    
Recreation Finance 3,344 3,254    
Other consumer 1,260 1,320    
Loans and leases [1] 75,079 74,900    
Allowance for loan and lease losses (764) (772) $ (721) $ (691)
Net loans and leases 74,315 74,128    
Consumer        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Automobile 12,272 12,429    
Home equity 9,549 9,720    
Residential mortgage 10,808 10,650    
Other consumer 1,260 1,320    
Allowance for loan and lease losses (219) (230) (206) (209)
Consumer | Automobile        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans and leases 12,272 12,429    
Consumer | Home Equity        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans and leases 9,551 9,722    
Consumer | Residential Mortgage        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans and leases 10,885 10,728    
Consumer | RV and Marine FInance        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans and leases 3,344 3,254    
Consumer | Other Consumer        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans and leases 1,260 1,320    
Commercial        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Commercial and industrial 30,972 30,605    
Commercial real estate 6,795 6,842    
Allowance for loan and lease losses (545) (542) $ (515) $ (482)
Commercial | Commercial and Industrial        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans and leases $ 30,972 $ 30,605    
[1] Amounts represent loans for which Huntington has elected the fair value option.