Quarterly report pursuant to Section 13 or 15(d)

NONINTEREST INCOME - Disaggregation by Segment (Details)

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NONINTEREST INCOME - Disaggregation by Segment (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers $ 308 $ 222
Noninterest income within the scope of other GAAP topics 191 173
Noninterest income 499 395
Service charges on deposit accounts    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 97 69
Card and payment processing income    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 80 62
Mortgage banking income    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 65 52
Insurance income    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 31 27
Other noninterest income    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 35 12
Operating Segments | Commercial Banking    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 56 28
Noninterest income within the scope of other GAAP topics 85 60
Noninterest income 141 88
Operating Segments | Commercial Banking | Service charges on deposit accounts    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 23 19
Operating Segments | Commercial Banking | Card and payment processing income    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 6 4
Operating Segments | Commercial Banking | Mortgage banking income    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 0 1
Operating Segments | Commercial Banking | Insurance income    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 2 2
Operating Segments | Commercial Banking | Other noninterest income    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 25 2
Operating Segments | Consumer & Business Banking    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 183 137
Noninterest income within the scope of other GAAP topics 89 99
Noninterest income 272 236
Operating Segments | Consumer & Business Banking | Service charges on deposit accounts    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 71 48
Operating Segments | Consumer & Business Banking | Card and payment processing income    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 74 58
Operating Segments | Consumer & Business Banking | Mortgage banking income    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 18 13
Operating Segments | Consumer & Business Banking | Insurance income    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 12 12
Operating Segments | Consumer & Business Banking | Other noninterest income    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 8 6
Operating Segments | Vehicle Finance    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 2 3
Noninterest income within the scope of other GAAP topics 1 0
Noninterest income 3 3
Operating Segments | Vehicle Finance | Service charges on deposit accounts    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 2 2
Operating Segments | Vehicle Finance | Card and payment processing income    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 0 0
Operating Segments | Vehicle Finance | Mortgage banking income    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 0 0
Operating Segments | Vehicle Finance | Insurance income    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 0 0
Operating Segments | Vehicle Finance | Other noninterest income    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 0 1
Operating Segments | RBPCG    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 65 52
Noninterest income within the scope of other GAAP topics 1 1
Noninterest income 66 53
Operating Segments | RBPCG | Service charges on deposit accounts    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 1 0
Operating Segments | RBPCG | Card and payment processing income    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 0 0
Operating Segments | RBPCG | Mortgage banking income    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 47 38
Operating Segments | RBPCG | Insurance income    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 16 13
Operating Segments | RBPCG | Other noninterest income    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 1 1
Treasury / Other    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 2 2
Noninterest income within the scope of other GAAP topics 15 13
Noninterest income 17 15
Treasury / Other | Service charges on deposit accounts    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 0 0
Treasury / Other | Card and payment processing income    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers 0 0
Treasury / Other | Mortgage banking income    
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 1 0
Treasury / Other | Other noninterest income    
Disaggregation of Revenue [Line Items]    
Noninterest income from contracts with customers $ 1 $ 2