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, 2024
Dec. 31, 2023
Dec. 31, 2022
Disaggregation of Revenue [Line Items]      
Insurance income $ 1,468 $ 1,400 $ 1,318
Noninterest income within the scope of other GAAP topics 572 521 663
Noninterest income 2,040 1,921 1,981
Payments and cash management revenue      
Disaggregation of Revenue [Line Items]      
Insurance income 567 536 513
Wealth and asset management revenue      
Disaggregation of Revenue [Line Items]      
Insurance income 364 328 300
Customer deposit and loan fees      
Disaggregation of Revenue [Line Items]      
Insurance income 227 211 231
Capital markets and advisory fees      
Disaggregation of Revenue [Line Items]      
Insurance income 193 132 110
Leasing revenue      
Disaggregation of Revenue [Line Items]      
Insurance income 30 51 67
Insurance income      
Disaggregation of Revenue [Line Items]      
Insurance income 77 74 79
Other noninterest income      
Disaggregation of Revenue [Line Items]      
Insurance income 10 68 18
Operating Segments | Consumer & Regional Banking      
Disaggregation of Revenue [Line Items]      
Insurance income 1,120 1,098 1,020
Noninterest income within the scope of other GAAP topics 181 159 252
Noninterest income 1,301 1,257 1,272
Operating Segments | Consumer & Regional Banking | Payments and cash management revenue      
Disaggregation of Revenue [Line Items]      
Insurance income 452 433 405
Operating Segments | Consumer & Regional Banking | Wealth and asset management revenue      
Disaggregation of Revenue [Line Items]      
Insurance income 352 313 294
Operating Segments | Consumer & Regional Banking | Customer deposit and loan fees      
Disaggregation of Revenue [Line Items]      
Insurance income 217 203 226
Operating Segments | Consumer & Regional Banking | Capital markets and advisory fees      
Disaggregation of Revenue [Line Items]      
Insurance income 21 16 15
Operating Segments | Consumer & Regional Banking | Leasing revenue      
Disaggregation of Revenue [Line Items]      
Insurance income 2 2 1
Operating Segments | Consumer & Regional Banking | Insurance income      
Disaggregation of Revenue [Line Items]      
Insurance income 67 64 71
Operating Segments | Consumer & Regional Banking | Other noninterest income      
Disaggregation of Revenue [Line Items]      
Insurance income 9 67 8
Operating Segments | Commercial Banking      
Disaggregation of Revenue [Line Items]      
Insurance income 353 307 304
Noninterest income within the scope of other GAAP topics 363 339 363
Noninterest income 716 646 667
Operating Segments | Commercial Banking | Payments and cash management revenue      
Disaggregation of Revenue [Line Items]      
Insurance income 115 103 108
Operating Segments | Commercial Banking | Wealth and asset management revenue      
Disaggregation of Revenue [Line Items]      
Insurance income 12 15 6
Operating Segments | Commercial Banking | Customer deposit and loan fees      
Disaggregation of Revenue [Line Items]      
Insurance income 10 8 5
Operating Segments | Commercial Banking | Capital markets and advisory fees      
Disaggregation of Revenue [Line Items]      
Insurance income 172 118 98
Operating Segments | Commercial Banking | Leasing revenue      
Disaggregation of Revenue [Line Items]      
Insurance income 28 49 66
Operating Segments | Commercial Banking | Insurance income      
Disaggregation of Revenue [Line Items]      
Insurance income 11 11 9
Operating Segments | Commercial Banking | Other noninterest income      
Disaggregation of Revenue [Line Items]      
Insurance income 5 3 12
Treasury / Other      
Disaggregation of Revenue [Line Items]      
Insurance income (5) (5) (6)
Noninterest income within the scope of other GAAP topics 28 23 48
Noninterest income 23 18 42
Treasury / Other | Payments and cash management revenue      
Disaggregation of Revenue [Line Items]      
Insurance income 0 0 0
Treasury / Other | Wealth and asset management revenue      
Disaggregation of Revenue [Line Items]      
Insurance income 0 0 0
Treasury / Other | Customer deposit and loan fees      
Disaggregation of Revenue [Line Items]      
Insurance income 0 0 0
Treasury / Other | Capital markets and advisory fees      
Disaggregation of Revenue [Line Items]      
Insurance income 0 (2) (3)
Treasury / Other | Leasing revenue      
Disaggregation of Revenue [Line Items]      
Insurance income 0 0 0
Treasury / Other | Insurance income      
Disaggregation of Revenue [Line Items]      
Insurance income (1) (1) (1)
Treasury / Other | Other noninterest income      
Disaggregation of Revenue [Line Items]      
Insurance income $ (4) $ (2) $ (2)