Annual report pursuant to Section 13 and 15(d)

NONINTEREST INCOME - Disaggregation by Segment (Details)

v3.10.0.1
NONINTEREST INCOME - Disaggregation by Segment (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 $ 881    
Noninterest income within the scope of other GAAP topics                 440    
Noninterest income $ 329 $ 342 $ 336 $ 314 $ 340 $ 330 $ 325 $ 312 1,321 $ 1,307 $ 1,150
Service charges on deposit accounts                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 363    
Cards and payment processing income                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 209    
Trust and investment management services                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 171    
Insurance income                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 82    
Other income                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 56    
Operating Segments | Consumer And Business Banking [Member]                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 588    
Noninterest income within the scope of other GAAP topics                 150    
Noninterest income                 738 735 649
Operating Segments | Consumer And Business Banking [Member] | Service charges on deposit accounts                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 290    
Operating Segments | Consumer And Business Banking [Member] | Cards and payment processing income                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 198    
Operating Segments | Consumer And Business Banking [Member] | Trust and investment management services                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 28    
Operating Segments | Consumer And Business Banking [Member] | Insurance income                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 34    
Operating Segments | Consumer And Business Banking [Member] | Other income                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 38    
Operating Segments | Commercial Banking [Member]                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 90    
Noninterest income within the scope of other GAAP topics                 223    
Noninterest income                 313 278 245
Operating Segments | Commercial Banking [Member] | Service charges on deposit accounts                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 64    
Operating Segments | Commercial Banking [Member] | Cards and payment processing income                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 11    
Operating Segments | Commercial Banking [Member] | Trust and investment management services                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 4    
Operating Segments | Commercial Banking [Member] | Insurance income                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 5    
Operating Segments | Commercial Banking [Member] | Other income                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 6    
Operating Segments | Vehicle Finance [Member]                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 8    
Noninterest income within the scope of other GAAP topics                 2    
Noninterest income                 10    
Operating Segments | Vehicle Finance [Member] | Service charges on deposit accounts                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 5    
Operating Segments | Vehicle Finance [Member] | Cards and payment processing income                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 0    
Operating Segments | Vehicle Finance [Member] | Trust and investment management services                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 0    
Operating Segments | Vehicle Finance [Member] | Insurance income                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 0    
Operating Segments | Vehicle Finance [Member] | Other income                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 3    
Operating Segments | Regional Banking and The Huntington Private Client Group [Member]                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 192    
Noninterest income within the scope of other GAAP topics                 1    
Noninterest income                 193 188 177
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                 4    
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    
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                 139    
Operating Segments | Regional Banking and The Huntington Private Client Group [Member] | Insurance income                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 41    
Operating Segments | Regional Banking and The Huntington Private Client Group [Member] | Other income                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 8    
Treasury / Other                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 3    
Noninterest income within the scope of other GAAP topics                 64    
Noninterest income                 67 $ 92 $ 64
Treasury / Other | Service charges on deposit accounts                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 0    
Treasury / Other | Cards and payment processing income                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 0    
Treasury / Other | Trust and investment management services                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 0    
Treasury / Other | Insurance income                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 2    
Treasury / Other | Other income                      
Disaggregation of Revenue [Line Items]                      
Noninterest income from contracts with customers                 $ 1