Interest Income and Interest Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Interest income
Loans	$ 92,353	$ 83,384	$ 52,736
Taxable securities	21,947	17,390	10,372
Non-taxable securities	1,197	1,336	975
Total investment securities	23,144	18,726	11,347
Trading assets - debt instruments	20,327	15,950	9,053
Federal funds sold and securities purchased under resale agreements	18,299	15,079	4,632
Securities borrowed	9,208	7,983	2,237
Deposits with banks	22,297	21,797	9,039
All other interest-earning assets	8,305	7,669	3,763
Total interest income	193,933	170,588	92,807
Interest expense
Interest bearing deposits	49,559	40,016	10,082
Federal funds purchased and securities loaned or sold under repurchase agreements	19,149	13,259	3,721
Short-term borrowings	2,101	1,894	747
Trading liabilities – debt and all other interest-bearing liabilities	10,238	9,396	3,246
Long-term debt	18,920	15,803	8,075
Beneficial interest issued by consolidated VIEs	1,383	953	226
Total interest expense	101,350	81,321	26,097
Net interest income	92,583	89,267	66,710
Provision for credit losses	10,678	9,320	6,389
Net interest income after provision for credit losses	$ 81,905	$ 79,947	$ 60,321