Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUES OF ASSETS AND LIABILITIES - Non-Recurring Basis (Details)

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FAIR VALUES OF ASSETS AND LIABILITIES - Non-Recurring Basis (Details) - USD ($)
$ in Millions
Sep. 30, 2020
Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans held for sale [1] $ 1,303 $ 877
Long-term debt 9,174 9,849
Amortized Cost 8,557 9,070
Assets measured at fair value on a nonrecurring basis    
Net loans and direct financing leases 79,360 74,621
Loans Held-for-sale, Fair Value Disclosure (1,118) (781)
Fair Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities, Trading, and Equity Securities, FV-NI 54 99
Loans held for sale 1,308 879
Available-for-sale securities 14,807 14,149
Long-term debt 9,440 10,075
Amortized Cost 8,970 9,186
Other Securities 421 441
Assets measured at fair value on a nonrecurring basis    
Net loans and direct financing leases 80,490 75,177
Level 1 | Fair Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities, Trading, and Equity Securities, FV-NI 0 30
Loans held for sale 0 0
Available-for-sale securities 5 10
Long-term debt 0 0
Amortized Cost 0 0
Assets measured at fair value on a nonrecurring basis    
Net loans and direct financing leases 0 0
Level 2 | Fair Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities, Trading, and Equity Securities, FV-NI 54 69
Loans held for sale 1,118 781
Available-for-sale securities 11,659 11,090
Long-term debt 8,877 9,439
Amortized Cost 8,970 9,186
Assets measured at fair value on a nonrecurring basis    
Net loans and direct financing leases 68 55
Level 3 | Fair Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities, Trading, and Equity Securities, FV-NI 0 0
Loans held for sale 190 98
Available-for-sale securities 3,143 3,049
Long-term debt 563 636
Amortized Cost 0 0
Assets measured at fair value on a nonrecurring basis    
Net loans and direct financing leases 80,422 75,122
Nonrecurring Basis    
Assets measured at fair value on a nonrecurring basis    
Collateral-dependent loans   (26)
Nonrecurring Basis | Fair Value    
Assets measured at fair value on a nonrecurring basis    
Collateral-dependent loans (124)  
Loans Held-for-sale, Fair Value Disclosure (107)  
Nonrecurring Basis | Total Gains/(Losses)    
Assets measured at fair value on a nonrecurring basis    
Collateral-dependent loans (39)  
Loans Held-for-sale, Fair Value Disclosure (58)  
Nonrecurring Basis | Level 1 | Fair Value    
Assets measured at fair value on a nonrecurring basis    
Collateral-dependent loans 0  
Nonrecurring Basis | Level 2 | Fair Value    
Assets measured at fair value on a nonrecurring basis    
Collateral-dependent loans 0  
Nonrecurring Basis | Level 3    
Assets measured at fair value on a nonrecurring basis    
MSRs   $ 206
Nonrecurring Basis | Level 3 | Fair Value    
Assets measured at fair value on a nonrecurring basis    
Collateral-dependent loans (124)  
Loans Held-for-sale, Fair Value Disclosure $ (107)  
[1] Amounts represent loans for which Huntington has elected the fair value option. See Note 12 “Fair Values of Assets and Liabilities”.