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Parent Company - Footnote Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Long-term Debt, Fiscal Year Maturity [Abstract]      
2019 $ 32,394    
2020 46,700    
2021 40,000    
2022 16,300    
2023 26,400    
Reimbursements from income taxes paid on behalf of certain subsidiaries 1,200 $ 4,100 $ 3,000
JPMorgan Chase & Co.      
Long-term Debt, Fiscal Year Maturity [Abstract]      
2019 13,141    
2020 22,100    
2021 20,300    
2022 12,800    
2023 $ 16,200    
JPMorgan Chase & Co. | Non-bank      
Condensed Financial Statements, Captions [Line Items]      
Contributions of substantially all of direct subsidiaries     55,400
JPMorgan Chase & Co. | Non-bank | Other assets      
Condensed Financial Statements, Captions [Line Items]      
Contributions to IHC     160,500
JPMorgan Chase & Co. | Non-bank | Noncash Assets      
Condensed Financial Statements, Captions [Line Items]      
Contributions to IHC   $ 16,200 $ 62,300