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COMMITMENTS, GUARANTEES, PRODUCT WARRANTIES AND OTHER LOSS CONTINGENCIES - Bank BPH (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2024
Jun. 30, 2023
Sep. 30, 2024
Sep. 30, 2025
Dec. 31, 2024
Related Party Transaction [Line Items]          
Litigation settlement costs $ 328   $ 363    
Bank BPH | Bank BPH litigation          
Related Party Transaction [Line Items]          
Litigation settlement costs   $ 1,014      
Estimate loss       $ 2,476 $ 2,461