Quarterly report pursuant to Section 13 or 15(d)

AVAILABLE-FOR-SALE AND OTHER SECURITIES - Narrative (Details)

v3.5.0.2
AVAILABLE-FOR-SALE AND OTHER SECURITIES - Narrative (Details)
$ in Millions
3 Months Ended 9 Months Ended
Jan. 14, 2014
agency
Sep. 30, 2016
USD ($)
pool
Sep. 30, 2015
USD ($)
Sep. 30, 2016
USD ($)
pool
Sep. 30, 2015
USD ($)
Dec. 31, 2015
USD ($)
Schedule of Available-for-sale Securities [Line Items]            
Pledged investment securities to secure public and trust deposits, trading account liabilities, US Treasury demand notes and security repurchase agreements   $ 6,000   $ 6,000    
Non-marketable equity securities            
Schedule of Available-for-sale Securities [Line Items]            
Stock issued by Federal Reserve Banks included in other securities   $ 243   $ 243   $ 176
Collateralized Debt Obligations            
Schedule of Available-for-sale Securities [Line Items]            
Number of federal agencies | agency 5          
Number of pools of trust preferred securities | pool   7   7    
Number of pools of trust preferred securities included in the no-exclusive list | pool   6   6    
Federal Home Loan Bank of Cincinnati | Non-marketable equity securities            
Schedule of Available-for-sale Securities [Line Items]            
Stock issued by the Federal Home Loan Bank included in other securities   $ 249   $ 249   $ 157
Commercial            
Schedule of Available-for-sale Securities [Line Items]            
Contractually Specified Servicing Fees, Late Fees, and Ancillary Fees Earned in Exchange for Servicing Financial Assets   $ 2 $ 2 $ 7 $ 6