JPMorgan National Municipal Income Fund Expense Example - R6 Shares [Member] - JPMorgan National Municipal Income Fund - Class R6	Feb. 28, 2025 USD ($)
Prospectus [Line Items]
Expense Example, with Redemption, 1 Year	$ 31
Expense Example, with Redemption, 3 Years	121
Expense Example, with Redemption, 5 Years	219
Expense Example, with Redemption, 10 Years	$ 507

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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