Parent Company - Statements of Income and Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income
Other income	$ 64,980	$ 58,154	$ 53,724
Total income	119,543	115,399	108,783
Expense
Other interest expense	9,960	26,795	21,041
Noninterest expense	5,941	5,087	5,731
Income tax benefit	(6,276)	(8,114)	(8,290)
Net income	29,131	36,431	32,474
Comprehensive income	35,548	39,507	30,998
JPMorgan Chase & Co.
Income
Interest income from subsidiaries	63	223	216
Other income	205	(1,731)	888
Total income	7,718	27,427	33,678
Expense
Interest expense/(income) to subsidiaries and affiliates	(8,830)	(5,303)	2,291
Other interest expense	14,150	13,246	4,581
Noninterest expense	2,222	1,992	1,793
Total expense	7,542	9,935	8,665
Income before income tax benefit and undistributed net income of subsidiaries	176	17,492	25,013
Income tax benefit	1,324	2,033	1,838
Equity in undistributed net income of subsidiaries	27,631	16,906	5,623
Net income	29,131	36,431	32,474
Other comprehensive income, net	6,417	3,076	(1,476)
Comprehensive income	35,548	39,507	30,998
Bank and bank holding company | JPMorgan Chase & Co.
Income
Dividends from subsidiaries and affiliates	6,000	26,000	32,501
Other income from subsidiaries	2,019	2,738	515
Non-bank | JPMorgan Chase & Co.
Income
Dividends from subsidiaries and affiliates	0	0	2
Other income from subsidiaries	$ (569)	$ 197	$ (444)