GUARANTEES AND COMMITMENTS - Guarantees (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Maximum potential amount of future payments
Expire within 1 year	$ 335,200	$ 317,400
Expire after 1 year	94,100	94,700
Total amount outstanding	429,300	412,100
Carrying value	1,043	1,156
Amount of cash initial margin collected and remitted	16,100	17,800
Cash collateral available to reimburse losses realized under guarantees and indemnifications	50,400	52,500
Securities and other marketable assets held as collateral	71,200	67,700
Letters of credit in favor of the Company held as collateral	3,000	3,100
Financial standby letters of credit
Maximum potential amount of future payments
Expire within 1 year	17,300	17,800
Expire after 1 year	62,800	63,500
Total amount outstanding	80,100	81,300
Carrying value	676	674
Performance guarantees
Maximum potential amount of future payments
Expire within 1 year	4,500	4,800
Expire after 1 year	5,500	5,800
Total amount outstanding	10,000	10,600
Carrying value	36	49
Derivative instruments considered to be guarantees
Maximum potential amount of future payments
Expire within 1 year	24,600	24,200
Expire after 1 year	16,900	16,300
Total amount outstanding	41,500	40,500
Carrying value	281	362
Loans sold with recourse
Maximum potential amount of future payments
Expire within 1 year	0	600
Expire after 1 year	1,000	1,200
Total amount outstanding	1,000	1,800
Carrying value	0	16
Repurchase reserve for consumer mortgages representations and warranties	12	11
Securities lending indemnifications
Maximum potential amount of future payments
Expire within 1 year	105,200	104,100
Expire after 1 year	0	0
Total amount outstanding	105,200	104,100
Carrying value	0	0
Credit card merchant processing
Maximum potential amount of future payments
Expire within 1 year	128,300	138,000
Expire after 1 year	0	0
Total amount outstanding	128,300	138,000
Carrying value	0	0
Credit card arrangements with partners
Maximum potential amount of future payments
Expire within 1 year	100	200
Expire after 1 year	200	200
Total amount outstanding	300	400
Carrying value	5	5
Other
Maximum potential amount of future payments
Expire within 1 year	55,200	27,700
Expire after 1 year	7,700	7,700
Total amount outstanding	62,900	35,400
Carrying value	$ 45	$ 50