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COMMISSIONS AND FEES; ADMINISTRATION AND OTHER FIDUCIARY FEES - Administration and Other Fiduciary Fees (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Commissions and fees
Total administration and other fiduciary fees	$ 1,117	$ 1,059	$ 3,285	$ 3,142
Custody fees
Commissions and fees
Total administration and other fiduciary fees	551	520	1,597	1,562
Fiduciary fees
Commissions and fees
Total administration and other fiduciary fees	431	403	1,286	1,183
Guarantee fees
Commissions and fees
Total administration and other fiduciary fees	135	136	402	397
Administration and other fiduciary fees
Commissions and fees
Total administration and other fiduciary fees	$ 1,117	$ 1,059	$ 3,285	$ 3,142

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