Quarterly report pursuant to Section 13 or 15(d)

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

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REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation by Segment (Details)
$ in Millions
 3 Months Ended 6 Months Ended 9 Months Ended
Sep. 30, 2024
USD ($)
Sep. 30, 2023
USD ($)
Jun. 30, 2024
reporting_segment
Sep. 30, 2024
USD ($)
reporting_segment
Sep. 30, 2023
USD ($)
Disaggregation of Revenue [Line Items]          
Number of reporting segments | reporting_segment     2 2  
Noninterest income from contracts with customers $ 362 $ 338   $ 1,058 $ 1,047
Noninterest income within the scope of other GAAP topics 161 171   423 469
Noninterest income 523 509   1,481 1,516
Payments and cash management revenue          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers 143 138   419 397
Wealth and asset management revenue          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers 93 79   271 242
Customer deposit and loan fees          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers 58 57   168 156
Capital markets fees          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers 37 31   109 92
Leasing revenue          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers 10 12   30 40
Insurance income          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers 17 18   54 55
Other noninterest income          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers 4 3   7 65
Operating Segments | Consumer & Regional Banking          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers 283 267   828 829
Noninterest income within the scope of other GAAP topics 55 40   140 124
Noninterest income 338 307   968 953
Operating Segments | Consumer & Regional Banking | Payments and cash management revenue          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers 114 112   335 321
Operating Segments | Consumer & Regional Banking | Wealth and asset management revenue          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers 89 76   262 231
Operating Segments | Consumer & Regional Banking | Customer deposit and loan fees          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers 57 55   160 152
Operating Segments | Consumer & Regional Banking | Capital markets fees          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers 5 3   16 11
Operating Segments | Consumer & Regional Banking | Leasing revenue          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers 1 0   2 1
Operating Segments | Consumer & Regional Banking | Insurance income          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers 15 17   47 49
Operating Segments | Consumer & Regional Banking | Other noninterest income          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers 2 4   6 64
Operating Segments | Commercial Banking          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers 81 74   233 222
Noninterest income within the scope of other GAAP topics 100 82   257 257
Noninterest income 181 156   490 479
Operating Segments | Commercial Banking | Payments and cash management revenue          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers 29 26   84 76
Operating Segments | Commercial Banking | Wealth and asset management revenue          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers 4 3   9 11
Operating Segments | Commercial Banking | Customer deposit and loan fees          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers 1 2   8 4
Operating Segments | Commercial Banking | Capital markets fees          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers 32 29   93 82
Operating Segments | Commercial Banking | Leasing revenue          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers 9 12   28 39
Operating Segments | Commercial Banking | Insurance income          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers 3 2   8 7
Operating Segments | Commercial Banking | Other noninterest income          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers 3 0   3 3
Treasury / Other          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers (2) (3)   (3) (4)
Noninterest income within the scope of other GAAP topics 6 49   26 88
Noninterest income 4 46   23 84
Treasury / Other | Payments and cash management revenue          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers 0 0   0 0
Treasury / Other | Wealth and asset management revenue          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers 0 0   0 0
Treasury / Other | Customer deposit and loan fees          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers 0 0   0 0
Treasury / Other | Capital markets fees          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers 0 (1)   0 (1)
Treasury / Other | Leasing revenue          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers 0 0   0 0
Treasury / Other | Insurance income          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers (1) (1)   (1) (1)
Treasury / Other | Other noninterest income          
Disaggregation of Revenue [Line Items]          
Noninterest income from contracts with customers $ (1) $ (1)   $ (2) $ (2)