JPMorgan National Municipal Income Fund Average Annual Total Returns - A C I Shares [Member]

12 Months Ended

60 Months Ended

120 Months Ended

Dec. 31, 2024

Dec. 31, 2024

Dec. 31, 2024

BLOOMBERG US MUNICIPAL INDEX(Reflects No Deduction for Fees, Expenses, or Taxes)[Member]

Prospectus [Line Items]

Average Annual Return, Percent

^[1],[2]

1.05%

0.99%

2.25%

BLOOMBERG U.S. 1-15 YEAR BLEND (1-17) MUNICIPAL BOND INDEX(Reflects No Deduction for Fees, Expenses, or Taxes)[Member]

Prospectus [Line Items]

Average Annual Return, Percent

0.88%

1.08%

2.04%

Class A

Prospectus [Line Items]

Average Annual Return, Percent

(1.83%)

(0.09%)

1.09%

Class C

Prospectus [Line Items]

Average Annual Return, Percent

0.38%

0.12%

1.01%

Class I

Prospectus [Line Items]

Average Annual Return, Percent

2.20%

0.91%

1.74%

Class I | After Taxes on Distributions

Prospectus [Line Items]

Average Annual Return, Percent

2.18%

0.86%

1.69%

Class I | After Taxes on Distributions and Sales

Prospectus [Line Items]

Average Annual Return, Percent

2.79%

1.35%

1.94%

[1]	As a result of new regulatory requirements, the Fund's regulatory index has changed from the Bloomberg California Municipal Bond Index to the Bloomberg US Municipal Index.
[2]	As a result of new regulatory requirements, the Fund's regulatory index has changed from the Bloomberg New York Municipal Bond Index to the Bloomberg US Municipal Index.