DERIVATIVES - Derivative Notionals (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Derivatives
Reduction in derivative receivables	$ (373,974)	$ (444,987)
Hedging instruments under ASC 815
Derivatives
Derivative notionals	356,381	349,195
Reduction in derivative receivables	(2,093)	(2,888)
Hedging instruments under ASC 815 | Interest rate contracts
Derivatives
Derivative notionals	264,079	255,280
Reduction in derivative receivables	(600)	(597)
Hedging instruments under ASC 815 | Interest rate swaps
Derivatives
Derivative notionals	264,079	255,280
Hedging instruments under ASC 815 | Interest rate futures and forwards
Derivatives
Derivative notionals	0	0
Hedging instruments under ASC 815 | Interest rate contract options | Written
Derivatives
Derivative notionals	0	0
Hedging instruments under ASC 815 | Interest rate contract options | Purchased
Derivatives
Derivative notionals	0	0
Hedging instruments under ASC 815 | Foreign exchange contracts
Derivatives
Derivative notionals	91,248	92,344
Reduction in derivative receivables	(1,493)	(2,291)
Hedging instruments under ASC 815 | Foreign exchange swaps
Derivatives
Derivative notionals	43,953	48,678
Hedging instruments under ASC 815 | Foreign exchange futures, forwards and spot
Derivatives
Derivative notionals	47,295	43,666
Hedging instruments under ASC 815 | Foreign exchange contract options | Written
Derivatives
Derivative notionals	0	0
Hedging instruments under ASC 815 | Foreign exchange contract options | Purchased
Derivatives
Derivative notionals	0	0
Hedging instruments under ASC 815 | Equity contracts
Derivatives
Derivative notionals	0	0
Hedging instruments under ASC 815 | Equity swaps
Derivatives
Derivative notionals	0	0
Hedging instruments under ASC 815 | Equity futures and forwards
Derivatives
Derivative notionals
Hedging instruments under ASC 815 | Equity contract options | Written
Derivatives
Derivative notionals	0	0
Hedging instruments under ASC 815 | Equity contract options | Purchased
Derivatives
Derivative notionals	0	0
Hedging instruments under ASC 815 | Commodity and other contracts
Derivatives
Derivative notionals	1,054	1,571
Hedging instruments under ASC 815 | Commodity and other swaps
Derivatives
Derivative notionals	0	0
Hedging instruments under ASC 815 | Commodity and other futures and forwards
Derivatives
Derivative notionals	1,054	1,571
Hedging instruments under ASC 815 | Commodity and other contracts | Written
Derivatives
Derivative notionals	0	0
Hedging instruments under ASC 815 | Commodity and other contracts | Purchased
Derivatives
Derivative notionals	0	0
Hedging instruments under ASC 815 | Credit derivatives
Derivatives
Derivative notionals	0	0
Hedging instruments under ASC 815 | Credit derivatives | Written
Derivatives
Derivative notionals	0	0
Hedging instruments under ASC 815 | Credit derivatives | Purchased
Derivatives
Derivative notionals	0	0
Other derivative instruments, Trading derivatives
Derivatives
Derivative notionals	51,366,831	45,032,245
Other derivative instruments, Trading derivatives | Interest rate contracts
Derivatives
Derivative notionals	35,100,946	30,565,052
Other derivative instruments, Trading derivatives | Interest rate swaps
Derivatives
Derivative notionals	26,305,698	23,780,711
Other derivative instruments, Trading derivatives | Interest rate futures and forwards
Derivatives
Derivative notionals	4,093,147	2,966,025
Other derivative instruments, Trading derivatives | Interest rate contract options | Written
Derivatives
Derivative notionals	2,422,224	1,937,025
Other derivative instruments, Trading derivatives | Interest rate contract options | Purchased
Derivatives
Derivative notionals	2,279,877	1,881,291
Other derivative instruments, Trading derivatives | Foreign exchange contracts
Derivatives
Derivative notionals	13,118,333	11,669,079
Other derivative instruments, Trading derivatives | Foreign exchange swaps
Derivatives
Derivative notionals	7,524,629	6,746,070
Other derivative instruments, Trading derivatives | Foreign exchange futures, forwards and spot
Derivatives
Derivative notionals	3,940,884	3,350,341
Other derivative instruments, Trading derivatives | Foreign exchange contract options | Written
Derivatives
Derivative notionals	831,553	789,077
Other derivative instruments, Trading derivatives | Foreign exchange contract options | Purchased
Derivatives
Derivative notionals	821,267	783,591
Other derivative instruments, Trading derivatives | Equity contracts
Derivatives
Derivative notionals	1,264,027	1,213,082
Other derivative instruments, Trading derivatives | Equity swaps
Derivatives
Derivative notionals	268,081	266,115
Other derivative instruments, Trading derivatives | Equity futures and forwards
Derivatives
Derivative notionals	95,533	76,935
Other derivative instruments, Trading derivatives | Equity contract options | Written
Derivatives
Derivative notionals	503,029	482,266
Other derivative instruments, Trading derivatives | Equity contract options | Purchased
Derivatives
Derivative notionals	397,384	387,766
Other derivative instruments, Trading derivatives | Commodity and other contracts
Derivatives
Derivative notionals	370,505	350,257
Other derivative instruments, Trading derivatives | Commodity and other swaps
Derivatives
Derivative notionals	89,225	90,884
Other derivative instruments, Trading derivatives | Commodity and other futures and forwards
Derivatives
Derivative notionals	176,672	165,314
Other derivative instruments, Trading derivatives | Commodity and other contracts | Written
Derivatives
Derivative notionals	51,463	45,862
Other derivative instruments, Trading derivatives | Commodity and other contracts | Purchased
Derivatives
Derivative notionals	53,145	48,197
Other derivative instruments, Trading derivatives | Credit derivatives
Derivatives
Derivative notionals	1,513,020	1,234,775
Other derivative instruments, Trading derivatives | Credit derivatives | Written
Derivatives
Derivative notionals	731,188	593,136
Other derivative instruments, Trading derivatives | Credit derivatives | Purchased
Derivatives
Derivative notionals	$ 781,832	$ 641,639