Quarterly report pursuant to Section 13 or 15(d)

NON-INTEREST INCOME - Disaggregation by Segment (Details)

v3.10.0.1
NON-INTEREST INCOME - Disaggregation by Segment (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers $ 217   $ 431  
Noninterest income within the scope of other GAAP topics 119   219  
Noninterest income 336 $ 325 650 $ 638
Service charges on deposit accounts        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 91   177  
Cards and payment processing income        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 52   101  
Trust and investment management services        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 42   86  
Insurance income        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 21   42  
Other income        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 11   25  
Operating Segments | Consumer And Business Banking [Member]        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 146   286  
Noninterest income within the scope of other GAAP topics 41   75  
Noninterest income 187 184 361 355
Operating Segments | Consumer And Business Banking [Member] | Service charges on deposit accounts        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 72   140  
Operating Segments | Consumer And Business Banking [Member] | Cards and payment processing income        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 49   96  
Operating Segments | Consumer And Business Banking [Member] | Trust and investment management services        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 5   12  
Operating Segments | Consumer And Business Banking [Member] | Insurance income        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 10   18  
Operating Segments | Consumer And Business Banking [Member] | Other income        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 10   20  
Operating Segments | Commercial Banking [Member]        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 23   42  
Noninterest income within the scope of other GAAP topics 57   107  
Noninterest income 80 69 149 134
Operating Segments | Commercial Banking [Member] | Service charges on deposit accounts        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 16   32  
Operating Segments | Commercial Banking [Member] | Cards and payment processing income        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 3   5  
Operating Segments | Commercial Banking [Member] | Trust and investment management services        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 2   2  
Operating Segments | Commercial Banking [Member] | Insurance income        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 1   2  
Operating Segments | Commercial Banking [Member] | Other income        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 1   1  
Operating Segments | Vehicle Finance [Member]        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 2   4  
Noninterest income within the scope of other GAAP topics 0   2  
Noninterest income 2 3 6 8
Operating Segments | Vehicle Finance [Member] | Service charges on deposit accounts        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 2   3  
Operating Segments | Vehicle Finance [Member] | Cards and payment processing income        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 0   0  
Operating Segments | Vehicle Finance [Member] | Trust and investment management services        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 0   0  
Operating Segments | Vehicle Finance [Member] | Insurance income        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 0   0  
Operating Segments | Vehicle Finance [Member] | Other income        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 0   1  
Operating Segments | Regional Banking and The Huntington Private Client Group [Member]        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 46   97  
Noninterest income within the scope of other GAAP topics 2   1  
Noninterest income 48 47 98 94
Operating Segments | Regional Banking and The Huntington Private Client Group [Member] | Service charges on deposit accounts        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 1   2  
Operating Segments | Regional Banking and The Huntington Private Client Group [Member] | Cards and payment processing income        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 0   0  
Operating Segments | Regional Banking and The Huntington Private Client Group [Member] | Trust and investment management services        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 35   72  
Operating Segments | Regional Banking and The Huntington Private Client Group [Member] | Insurance income        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 10   21  
Operating Segments | Regional Banking and The Huntington Private Client Group [Member] | Other income        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 0   2  
Treasury / Other        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 0   2  
Noninterest income within the scope of other GAAP topics 19   34  
Noninterest income 19 $ 22 36 $ 47
Treasury / Other | Service charges on deposit accounts        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 0   0  
Treasury / Other | Cards and payment processing income        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 0   0  
Treasury / Other | Trust and investment management services        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 0   0  
Treasury / Other | Insurance income        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers 0   1  
Treasury / Other | Other income        
Disaggregation of Revenue [Line Items]        
Noninterest income from contracts with customers $ 0   $ 1