Quarterly report pursuant to Section 13 or 15(d)

NONINTEREST INCOME - Summary of Noninterest Income (Details)

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NONINTEREST INCOME - Summary of Noninterest Income (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Revenue from Contract with Customer [Abstract]        
Noninterest income from contracts with customers $ 257 $ 201 $ 479 $ 428
Noninterest income within the scope of other GAAP topics 187 190 360 324
Total noninterest income $ 444 $ 391 $ 839 $ 752