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Parent Company - Footnote Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Long-term Debt, Fiscal Year Maturity [Abstract]      
2021 $ 26,934    
2022 18,400    
2023 32,200    
2024 29,600    
2025 17,100    
Reimbursements from income taxes paid on behalf of certain subsidiaries 8,300 $ 6,400 $ 1,200
JPMorgan Chase & Co.      
Long-term Debt, Fiscal Year Maturity [Abstract]      
2021 10,805    
2022 10,000    
2023 19,100    
2024 21,800    
2025 13,500    
JPMorgan Chase & Co. | JPMorgan Chase Bank, N.A.      
Long-term Debt, Fiscal Year Maturity [Abstract]      
Distributions received as return of capital $ 13,500