Quarterly report pursuant to Section 13 or 15(d)

LONG-TERM DEBT (Details)

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LONG-TERM DEBT (Details) - Senior Notes - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Jan. 28, 2020
Huntington National Bank Senior Note Due February 2023, 1.8 Percent [Member]    
Debt Instrument [Line Items]    
Debt face amount   $ 500
Debt percent of value 99.916%  
Debt stated interest rate   1.80%
Debt Instrument, Redemption Price, Percentage 100.00%  
Huntington National Bank Senior Note Due February 4, 2030 2.550 Percent [Member]    
Debt Instrument [Line Items]    
Debt face amount   $ 750
Debt percent of value 99.597%  
Debt stated interest rate   2.55%
Debt Instrument, Redemption Price, Percentage 100.00%