Annual report pursuant to Section 13 and 15(d)

REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation by Segment (Details)

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REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation by Segment (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers $ 1,400 $ 1,318 $ 1,113
Noninterest income within the scope of other GAAP topics 521 663 776
Noninterest income 1,921 1,981 1,889
Payments and cash management revenue      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers 536 513 464
Wealth and asset management revenue      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers 328 300 269
Customer deposit and loan fees      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers 211 231 227
Capital markets fees      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers 132 110 29
Leasing revenue      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers 51 67 23
Insurance income      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers 74 79 82
Other      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers 68 18 19
Operating Segments | Consumer & Business Banking      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers 1,098 1,020 945
Noninterest income within the scope of other GAAP topics 159 252 344
Noninterest income 1,257 1,272 1,289
Operating Segments | Consumer & Business Banking | Payments and cash management revenue      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers 433 405 360
Operating Segments | Consumer & Business Banking | Wealth and asset management revenue      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers 313 294 266
Operating Segments | Consumer & Business Banking | Customer deposit and loan fees      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers 203 226 226
Operating Segments | Consumer & Business Banking | Capital markets fees      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers 16 15 10
Operating Segments | Consumer & Business Banking | Leasing revenue      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers 2 1 2
Operating Segments | Consumer & Business Banking | Insurance income      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers 64 71 75
Operating Segments | Consumer & Business Banking | Other      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers 67 8 6
Operating Segments | Commercial Banking      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers 307 304 156
Noninterest income within the scope of other GAAP topics 339 363 363
Noninterest income 646 667 519
Operating Segments | Commercial Banking | Payments and cash management revenue      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers 103 108 104
Operating Segments | Commercial Banking | Wealth and asset management revenue      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers 15 6 3
Operating Segments | Commercial Banking | Customer deposit and loan fees      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers 8 5 1
Operating Segments | Commercial Banking | Capital markets fees      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers 118 98 19
Operating Segments | Commercial Banking | Leasing revenue      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers 49 66 21
Operating Segments | Commercial Banking | Insurance income      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers 11 9 6
Operating Segments | Commercial Banking | Other      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers 3 12 2
Treasury / Other      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers (5) (6) 12
Noninterest income within the scope of other GAAP topics 23 48 69
Noninterest income 18 42 81
Treasury / Other | Payments and cash management revenue      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers 0 0 0
Treasury / Other | Wealth and asset management revenue      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers 0 0 0
Treasury / Other | Customer deposit and loan fees      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers 0 0 0
Treasury / Other | Capital markets fees      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers (2) (3) 0
Treasury / Other | Leasing revenue      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers 0 0 0
Treasury / Other | Insurance income      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers (1) (1) 1
Treasury / Other | Other      
Disaggregation of Revenue [Line Items]      
Net revenue from contracts with customers $ (2) $ (2) $ 11