Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUES OF ASSETS AND LIABILITIES - Balance Sheet Location (Details)

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FAIR VALUES OF ASSETS AND LIABILITIES - Balance Sheet Location (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Financial Assets:    
Trading account securities $ 85,000 $ 86,000
Available-for-sale securities 14,607,000 14,869,000
Held-to-maturity securities, Total 8,789,000 9,091,000
Loans held for sale [1] 506,000 488,000
Net loans and direct financing leases 70,442,000 69,426,000
Derivatives 87,000 132,000
Financial Liabilities:    
Deposits 79,471,000 77,041,000
Short-term borrowings 2,854,000 5,056,000
Long-term borrowings 8,618,000 9,206,000
Derivatives 157,000 86,000
Reported Value Measurement [Member]    
Financial Assets:    
Cash and short term assets 1,115,000 1,567,000
Trading account securities 85,000 86,000
Available-for-sale securities 14,607,000 14,869,000
Held-to-maturity securities, Total 8,789,000 9,091,000
Loans held for sale 506,000 488,000
Other Securities 602,000 600,000
Net loans and direct financing leases 70,442,000 69,426,000
Derivatives 87,000 132,000
Financial Liabilities:    
Deposits 79,471,000 77,041,000
Short-term borrowings 2,854,000 5,056,000
Long-term borrowings 8,618,000 9,206,000
Derivatives 157,000 86,000
Estimate of Fair Value Measurement [Member]    
Financial Assets:    
Cash and short term assets 1,115,000 1,567,000
Trading account securities 85,000 86,000
Available-for-sale securities 14,607,000 14,869,000
Held-to-maturity securities, Total 8,550,000 8,971,000
Loans held for sale 510,000 491,000
Other Securities 602,000 600,000
Other securities 21,000 19,000
Net loans and direct financing leases 69,820,000 69,146,000
Derivatives 87,000 132,000
Financial Liabilities:    
Deposits 79,425,000 77,010,000
Short-term borrowings 2,854,000 5,056,000
Long-term borrowings 8,771,000 9,402,000
Derivatives 157,000 86,000
Estimate of Fair Value Measurement [Member] | Level 1    
Financial Assets:    
Trading account securities 82,000  
Available-for-sale securities 5,000 5,000
Held-to-maturity securities, Total 0 0
Loans held for sale 0 0
Other securities 21,000 19,000
Net loans and direct financing leases 0 0
Financial Liabilities:    
Deposits 0 0
Short-term borrowings 1,000 0
Long-term borrowings 0 0
Estimate of Fair Value Measurement [Member] | Level 2    
Financial Assets:    
Trading account securities 3,000  
Available-for-sale securities 11,372,000 11,673,000
Held-to-maturity securities, Total 8,550,000 8,971,000
Loans held for sale 426,000 413,000
Other securities 0 0
Net loans and direct financing leases 0 0
Financial Liabilities:    
Deposits 74,573,000 73,975,000
Short-term borrowings 0 0
Long-term borrowings 8,299,000 8,944,000
Estimate of Fair Value Measurement [Member] | Level 3    
Financial Assets:    
Trading account securities 0 0
Available-for-sale securities 3,230,000 3,191,000
Held-to-maturity securities, Total 0 0
Loans held for sale 84,000 78,000
Other securities 0 0
Net loans and direct financing leases 69,820,000 69,146,000
Financial Liabilities:    
Deposits 4,852,000 3,035,000
Short-term borrowings 2,853,000 5,056,000
Long-term borrowings 472,000 458,000
Fair Value, Measurements, Recurring [Member]    
Financial Assets:    
Trading account securities 85,000 86,000
Available-for-sale securities 14,607,000 14,869,000
Derivatives 87,000 132,000
Financial Liabilities:    
Derivatives 157,000 86,000
Fair Value, Measurements, Recurring [Member] | Level 1    
Financial Assets:    
Trading account securities 82,000 83,000
Available-for-sale securities 5,000 5,000
Fair Value, Measurements, Recurring [Member] | Level 2    
Financial Assets:    
Trading account securities 3,000 3,000
Available-for-sale securities 11,372,000 11,673,000
Fair Value, Measurements, Recurring [Member] | Level 3    
Financial Assets:    
Trading account securities 0 0
Available-for-sale securities 3,230,000 3,191,000
Other Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member]    
Financial Assets:    
Trading account securities 83,000 86,000
Available-for-sale securities 6,000 2,000
Other Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Level 1    
Financial Assets:    
Trading account securities 82,000 83,000
Available-for-sale securities 0 0
Other Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Level 2    
Financial Assets:    
Trading account securities 1,000 3,000
Available-for-sale securities 6,000 2,000
Other Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Level 3    
Financial Assets:    
Trading account securities 0 0
Available-for-sale securities 0 0
Amortized Cost [Member] | Reported Value Measurement [Member]    
Financial Assets:    
Cash and short term assets 1,115,000 1,567,000
Held-to-maturity securities, Total 8,789,000 9,091,000
Other Securities 581,000 581,000
Net loans and direct financing leases 70,356,000 69,333,000
Financial Liabilities:    
Deposits 79,471,000 77,041,000
Short-term borrowings 2,854,000 5,056,000
Long-term borrowings 8,618,000 9,206,000
Fair Value Fair Value Option [Member] | Reported Value Measurement [Member]    
Financial Assets:    
Trading account securities 85,000 86,000
Available-for-sale securities 14,607,000 14,869,000
Loans held for sale 426,000 413,000
Other Securities 21,000 19,000
Net loans and direct financing leases 86,000 93,000
Derivatives 87,000 132,000
Financial Liabilities:    
Derivatives 157,000 86,000
LowerOfCostOrMarket [Member] | Reported Value Measurement [Member]    
Financial Assets:    
Loans held for sale $ 80,000 $ 75,000
[1] Amounts represent loans for which Huntington has elected the fair value option.