Derivatives, Offsetting of Derivative Assets and Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Derivative Assets
Derivative Assets, gross	$ 69,478	$ 68,095
Counterparty netting, assets	(52,158)	(50,692)
Cash collateral netting, assets	(3,275)	(4,456)
Total derivatives subject to enforceable master netting arrangements, net, assets	14,045	12,947
Derivatives not subject to enforceable master netting arrangements, assets	3,676	5,276
Derivative assets	17,721	18,223
Non-cash collateral not offset, assets	(2,097)	(2,587)
Total Derivatives, net, assets	15,624	15,636
Derivative Liabilities
Derivative Liabilities, gross	72,418	75,488
Counterparty netting, liabilities	(52,075)	(50,606)
Cash collateral netting, liabilities	(12,540)	(11,538)
Total derivatives subject to enforceable master netting arrangements, net, liabilities	7,803	13,344
Derivatives not subject to enforceable master netting arrangements , liabilities	3,587	5,151
Derivative liabilities	11,390	18,495
Non-cash collateral not offset, Liabilities	(1,330)	(4,388)
Total Derivatives, net, liabilities	10,060	14,107
Derivatives (Textual) [Abstract]
Valuation adjustments for derivative assets	299	292
Valuation adjustments for derivative liabilities	215	222
Interest rate contracts [Member]
Derivative Assets
Derivative Assets, gross	25,208	30,816
Derivative Liabilities
Derivative Liabilities, gross	25,928	33,407
Interest rate contracts [Member] | OTC [Member]
Derivative Assets
Derivative Assets, gross	24,365	29,040
Derivative Liabilities
Derivative Liabilities, gross	25,027	31,809
Interest rate contracts [Member] | OTC cleared [Member]
Derivative Assets
Derivative Assets, gross	673	1,581
Derivative Liabilities
Derivative Liabilities, gross	743	1,397
Interest rate contracts [Member] | Exchange traded [Member]
Derivative Assets
Derivative Assets, gross	170	195
Derivative Liabilities
Derivative Liabilities, gross	158	201
Commodity contracts [Member]
Derivative Assets
Derivative Assets, gross	2,190	2,526
Derivative Liabilities
Derivative Liabilities, gross	2,145	2,610
Commodity contracts [Member] | OTC [Member]
Derivative Assets
Derivative Assets, gross	1,785	2,014
Derivative Liabilities
Derivative Liabilities, gross	1,859	2,254
Commodity contracts [Member] | Exchange traded [Member]
Derivative Assets
Derivative Assets, gross	405	512
Derivative Liabilities
Derivative Liabilities, gross	286	356
Equity contracts [Member]
Derivative Assets
Derivative Assets, gross	14,514	10,165
Derivative Liabilities
Derivative Liabilities, gross	15,101	12,471
Equity contracts [Member] | OTC [Member]
Derivative Assets
Derivative Assets, gross	6,729	5,375
Derivative Liabilities
Derivative Liabilities, gross	9,843	8,501
Equity contracts [Member] | Exchange traded [Member]
Derivative Assets
Derivative Assets, gross	7,785	4,790
Derivative Liabilities
Derivative Liabilities, gross	5,258	3,970
Foreign exchange contracts [Member]
Derivative Assets
Derivative Assets, gross	27,477	24,511
Derivative Liabilities
Derivative Liabilities, gross	29,204	26,961
Foreign exchange contracts [Member] | OTC [Member]
Derivative Assets
Derivative Assets, gross	27,477	24,511
Derivative Liabilities
Derivative Liabilities, gross	29,204	26,961
Credit contracts [Member]
Derivative Assets
Derivative Assets, gross	89	77
Derivative Liabilities
Derivative Liabilities, gross	40	39
Credit contracts [Member] | OTC [Member]
Derivative Assets
Derivative Assets, gross	89	77
Derivative Liabilities
Derivative Liabilities, gross	$ 40	$ 39