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Shareholder Report
 6 Months Ended
Aug. 31, 2024
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name JPMorgan Trust II
Entity Central Index Key 0000763852
Document Period End Date Aug. 31, 2024
C000009621 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Core Plus Bond Fund
Class Name Class A Shares
Trading Symbol ONIAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Core Plus Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Core Plus Bond Fund
(Class A Shares)		 $38 0.74%
*
This charge is annualized.
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.74% [1]
Net Assets $ 21,387,202,000
Holdings Count | Holding 3,042
Investment Company Portfolio Turnover 47.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $21,387,202
Total number of portfolio holdings $3,042
Portfolio turnover rate $47 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000009623 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Core Plus Bond Fund
Class Name Class C Shares
Trading Symbol OBDCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Core Plus Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Core Plus Bond Fund
(Class C Shares)		 $71 1.37%
*
This charge is annualized.
Expenses Paid, Amount $ 71
Expense Ratio, Percent 1.37% [2]
Net Assets $ 21,387,202,000
Holdings Count | Holding 3,042
Investment Company Portfolio Turnover 47.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $21,387,202
Total number of portfolio holdings $3,042
Portfolio turnover rate $47 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000009620 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Core Plus Bond Fund
Class Name Class I Shares
Trading Symbol HLIPX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Core Plus Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Core Plus Bond Fund
(Class I Shares)		 $23 0.45%
*
This charge is annualized.
Expenses Paid, Amount $ 23
Expense Ratio, Percent 0.45% [3]
Net Assets $ 21,387,202,000
Holdings Count | Holding 3,042
Investment Company Portfolio Turnover 47.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $21,387,202
Total number of portfolio holdings $3,042
Portfolio turnover rate $47 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000070639 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Core Plus Bond Fund
Class Name Class R2 Shares
Trading Symbol JCPZX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Core Plus Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Core Plus Bond Fund
(Class R2 Shares)		 $58 1.13%
*
This charge is annualized.
Expenses Paid, Amount $ 58
Expense Ratio, Percent 1.13% [4]
Net Assets $ 21,387,202,000
Holdings Count | Holding 3,042
Investment Company Portfolio Turnover 47.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $21,387,202
Total number of portfolio holdings $3,042
Portfolio turnover rate $47 %
Holdings [Text Block]
Graphical Representation - Allocation 1 Chart
C000173236 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Core Plus Bond Fund
Class Name Class R3 Shares
Trading Symbol JCPPX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Core Plus Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Core Plus Bond Fund
(Class R3 Shares)		 $45 0.87%
*
This charge is annualized.
Expenses Paid, Amount $ 45
Expense Ratio, Percent 0.87% [5]
Net Assets $ 21,387,202,000
Holdings Count | Holding 3,042
Investment Company Portfolio Turnover 47.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $21,387,202
Total number of portfolio holdings $3,042
Portfolio turnover rate $47 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000173237 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Core Plus Bond Fund
Class Name Class R4 Shares
Trading Symbol JCPQX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Core Plus Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Core Plus Bond Fund
(Class R4 Shares)		 $32 0.63%
*
This charge is annualized.
Expenses Paid, Amount $ 32
Expense Ratio, Percent 0.63% [6]
Net Assets $ 21,387,202,000
Holdings Count | Holding 3,042
Investment Company Portfolio Turnover 47.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $21,387,202
Total number of portfolio holdings $3,042
Portfolio turnover rate $47 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000173238 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Core Plus Bond Fund
Class Name Class R5 Shares
Trading Symbol JCPYX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Core Plus Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Core Plus Bond Fund
(Class R5 Shares)		 $25 0.49%
*
This charge is annualized.
Expenses Paid, Amount $ 25
Expense Ratio, Percent 0.49% [7]
Net Assets $ 21,387,202,000
Holdings Count | Holding 3,042
Investment Company Portfolio Turnover 47.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $21,387,202
Total number of portfolio holdings $3,042
Portfolio turnover rate $47 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000009624 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Core Plus Bond Fund
Class Name Class R6 Shares
Trading Symbol JCPUX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Core Plus Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Core Plus Bond Fund
(Class R6 Shares)		 $19 0.36%
*
This charge is annualized.
Expenses Paid, Amount $ 19
Expense Ratio, Percent 0.36% [8]
Net Assets $ 21,387,202,000
Holdings Count | Holding 3,042
Investment Company Portfolio Turnover 47.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $21,387,202
Total number of portfolio holdings $3,042
Portfolio turnover rate $47 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000009633 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Government Bond Fund
Class Name Class A Shares
Trading Symbol OGGAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Government Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Government Bond Fund
(Class A Shares)		 $36 0.69%
*
This charge is annualized.
Expenses Paid, Amount $ 36
Expense Ratio, Percent 0.69% [9]
Net Assets $ 1,978,342,000
Holdings Count | Holding 346
Investment Company Portfolio Turnover 5.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $1,978,342
Total number of portfolio holdings $346
Portfolio turnover rate $5 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000009635 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Government Bond Fund
Class Name Class C Shares
Trading Symbol OGVCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Government Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Government Bond Fund
(Class C Shares)		 $61 1.19%
*
This charge is annualized.
Expenses Paid, Amount $ 61
Expense Ratio, Percent 1.19% [10]
Net Assets $ 1,978,342,000
Holdings Count | Holding 346
Investment Company Portfolio Turnover 5.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $1,978,342
Total number of portfolio holdings $346
Portfolio turnover rate $5 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000009632 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Government Bond Fund
Class Name Class I Shares
Trading Symbol HLGAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Government Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Government Bond Fund
(Class I Shares)		 $23 0.44%
*
This charge is annualized.
Expenses Paid, Amount $ 23
Expense Ratio, Percent 0.44% [11]
Net Assets $ 1,978,342,000
Holdings Count | Holding 346
Investment Company Portfolio Turnover 5.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $1,978,342
Total number of portfolio holdings $346
Portfolio turnover rate $5 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000070640 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Government Bond Fund
Class Name Class R2 Shares
Trading Symbol JGBZX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Government Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Government Bond Fund
(Class R2 Shares)		 $54 1.04%
*
This charge is annualized.
Expenses Paid, Amount $ 54
Expense Ratio, Percent 1.04% [12]
Net Assets $ 1,978,342,000
Holdings Count | Holding 346
Investment Company Portfolio Turnover 5.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $1,978,342
Total number of portfolio holdings $346
Portfolio turnover rate $5 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000171356 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Government Bond Fund
Class Name Class R3 Shares
Trading Symbol OGGPX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Government Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Government Bond Fund
(Class R3 Shares)		 $41 0.79%
*
This charge is annualized.
Expenses Paid, Amount $ 41
Expense Ratio, Percent 0.79% [13]
Net Assets $ 1,978,342,000
Holdings Count | Holding 346
Investment Company Portfolio Turnover 5.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $1,978,342
Total number of portfolio holdings $346
Portfolio turnover rate $5 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000171357 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Government Bond Fund
Class Name Class R4 Shares
Trading Symbol OGGQX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Government Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Government Bond Fund
(Class R4 Shares)		 $28 0.54%
*
This charge is annualized.
Expenses Paid, Amount $ 28
Expense Ratio, Percent 0.54% [14]
Net Assets $ 1,978,342,000
Holdings Count | Holding 346
Investment Company Portfolio Turnover 5.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $1,978,342
Total number of portfolio holdings $346
Portfolio turnover rate $5 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000009631 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Government Bond Fund
Class Name Class R6 Shares
Trading Symbol OGGYX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Government Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Government Bond Fund
(Class R6 Shares)		 $15 0.29%
*
This charge is annualized.
Expenses Paid, Amount $ 15
Expense Ratio, Percent 0.29% [15]
Net Assets $ 1,978,342,000
Holdings Count | Holding 346
Investment Company Portfolio Turnover 5.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $1,978,342
Total number of portfolio holdings $346
Portfolio turnover rate $5 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000009654 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Short Duration Bond Fund
Class Name Class A Shares
Trading Symbol OGLVX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Short Duration Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Short Duration Bond Fund
(Class A Shares)		 $30 0.58%
*
This charge is annualized.
Expenses Paid, Amount $ 30
Expense Ratio, Percent 0.58% [16]
Net Assets $ 9,139,968,000
Holdings Count | Holding 1,517
Investment Company Portfolio Turnover 28.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $9,139,968
Total number of portfolio holdings $1,517
Portfolio turnover rate $28 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000009656 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Short Duration Bond Fund
Class Name Class C Shares
Trading Symbol OSTCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Short Duration Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Short Duration Bond Fund
(Class C Shares)		 $55 1.08%
*
This charge is annualized.
Expenses Paid, Amount $ 55
Expense Ratio, Percent 1.08% [17]
Net Assets $ 9,139,968,000
Holdings Count | Holding 1,517
Investment Company Portfolio Turnover 28.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $9,139,968
Total number of portfolio holdings $1,517
Portfolio turnover rate $28 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000009653 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Short Duration Bond Fund
Class Name Class I Shares
Trading Symbol HLLVX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Short Duration Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Short Duration Bond Fund
(Class I Shares)		 $17 0.33%
*
This charge is annualized.
Expenses Paid, Amount $ 17
Expense Ratio, Percent 0.33% [18]
Net Assets $ 9,139,968,000
Holdings Count | Holding 1,517
Investment Company Portfolio Turnover 28.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $9,139,968
Total number of portfolio holdings $1,517
Portfolio turnover rate $28 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000009657 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Short Duration Bond Fund
Class Name Class R6 Shares
Trading Symbol JSDUX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Short Duration Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Short Duration Bond Fund
(Class R6 Shares)		 $14 0.27%
*
This charge is annualized.
Expenses Paid, Amount $ 14
Expense Ratio, Percent 0.27% [19]
Net Assets $ 9,139,968,000
Holdings Count | Holding 1,517
Investment Company Portfolio Turnover 28.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $9,139,968
Total number of portfolio holdings $1,517
Portfolio turnover rate $28 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000009616 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Core Bond Fund
Class Name Class A Shares
Trading Symbol PGBOX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Core Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Core Bond Fund
(Class A Shares)		 $38 0.74%
*
This charge is annualized.
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.74% [20]
Net Assets $ 47,498,418,000
Holdings Count | Holding 3,740
Investment Company Portfolio Turnover 14.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $47,498,418
Total number of portfolio holdings $3,740
Portfolio turnover rate $14 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000009618 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Core Bond Fund
Class Name Class C Shares
Trading Symbol OBOCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Core Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Core Bond Fund
(Class C Shares)		 $68 1.32%
*
This charge is annualized.
Expenses Paid, Amount $ 68
Expense Ratio, Percent 1.32% [21]
Net Assets $ 47,498,418,000
Holdings Count | Holding 3,740
Investment Company Portfolio Turnover 14.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $47,498,418
Total number of portfolio holdings $3,740
Portfolio turnover rate $14 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000009615 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Core Bond Fund
Class Name Class I Shares
Trading Symbol WOBDX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Core Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Core Bond Fund
(Class I Shares)		 $25 0.49%
*
This charge is annualized.
Expenses Paid, Amount $ 25
Expense Ratio, Percent 0.49% [22]
Net Assets $ 47,498,418,000
Holdings Count | Holding 3,740
Investment Company Portfolio Turnover 14.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $47,498,418
Total number of portfolio holdings $3,740
Portfolio turnover rate $14 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000070638 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Core Bond Fund
Class Name Class R2 Shares
Trading Symbol JCBZX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Core Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Core Bond Fund
(Class R2 Shares)		 $56 1.08%
*
This charge is annualized.
Expenses Paid, Amount $ 56
Expense Ratio, Percent 1.08% [23]
Net Assets $ 47,498,418,000
Holdings Count | Holding 3,740
Investment Company Portfolio Turnover 14.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $47,498,418
Total number of portfolio holdings $3,740
Portfolio turnover rate $14 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000173234 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Core Bond Fund
Class Name Class R3 Shares
Trading Symbol JCBPX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Core Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Core Bond Fund
(Class R3 Shares)		 $42 0.82%
*
This charge is annualized.
Expenses Paid, Amount $ 42
Expense Ratio, Percent 0.82% [24]
Net Assets $ 47,498,418,000
Holdings Count | Holding 3,740
Investment Company Portfolio Turnover 14.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $47,498,418
Total number of portfolio holdings $3,740
Portfolio turnover rate $14 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000173235 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Core Bond Fund
Class Name Class R4 Shares
Trading Symbol JCBQX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Core Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Core Bond Fund
(Class R4 Shares)		 $30 0.58%
*
This charge is annualized.
Expenses Paid, Amount $ 30
Expense Ratio, Percent 0.58% [25]
Net Assets $ 47,498,418,000
Holdings Count | Holding 3,740
Investment Company Portfolio Turnover 14.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $47,498,418
Total number of portfolio holdings $3,740
Portfolio turnover rate $14 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000033520 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Core Bond Fund
Class Name Class R5 Shares
Trading Symbol JCBRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Core Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Core Bond Fund
(Class R5 Shares)		 $22 0.42%
*
This charge is annualized.
Expenses Paid, Amount $ 22
Expense Ratio, Percent 0.42% [26]
Net Assets $ 47,498,418,000
Holdings Count | Holding 3,740
Investment Company Portfolio Turnover 14.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $47,498,418
Total number of portfolio holdings $3,740
Portfolio turnover rate $14 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000009619 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Core Bond Fund
Class Name Class R6 Shares
Trading Symbol JCBUX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Core Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Core Bond Fund
(Class R6 Shares)		 $17 0.32%
*
This charge is annualized.
Expenses Paid, Amount $ 17
Expense Ratio, Percent 0.32% [27]
Net Assets $ 47,498,418,000
Holdings Count | Holding 3,740
Investment Company Portfolio Turnover 14.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $47,498,418
Total number of portfolio holdings $3,740
Portfolio turnover rate $14 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000009637 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan High Yield Fund
Class Name Class A Shares
Trading Symbol OHYAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan High Yield Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan High Yield Fund
(Class A Shares)		 $46 0.89%
*
This charge is annualized.
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.89% [28]
Net Assets $ 5,516,014,000
Holdings Count | Holding 782
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $5,516,014
Total number of portfolio holdings $782
Portfolio turnover rate $11 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000009639 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan High Yield Fund
Class Name Class C Shares
Trading Symbol OGHCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan High Yield Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan High Yield Fund
(Class C Shares)		 $72 1.39%
*
This charge is annualized.
Expenses Paid, Amount $ 72
Expense Ratio, Percent 1.39% [29]
Net Assets $ 5,516,014,000
Holdings Count | Holding 782
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $5,516,014
Total number of portfolio holdings $782
Portfolio turnover rate $11 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000009636 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan High Yield Fund
Class Name Class I Shares
Trading Symbol OHYFX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan High Yield Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan High Yield Fund
(Class I Shares)		 $33 0.64%
*
This charge is annualized.
Expenses Paid, Amount $ 33
Expense Ratio, Percent 0.64% [30]
Net Assets $ 5,516,014,000
Holdings Count | Holding 782
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $5,516,014
Total number of portfolio holdings $782
Portfolio turnover rate $11 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000070641 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan High Yield Fund
Class Name Class R2 Shares
Trading Symbol JHYZX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan High Yield Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan High Yield Fund
(Class R2 Shares)		 $64 1.24%
*
This charge is annualized.
Expenses Paid, Amount $ 64
Expense Ratio, Percent 1.24% [31]
Net Assets $ 5,516,014,000
Holdings Count | Holding 782
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $5,516,014
Total number of portfolio holdings $782
Portfolio turnover rate $11 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000192734 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan High Yield Fund
Class Name Class R3 Shares
Trading Symbol JRJYX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan High Yield Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan High Yield Fund
(Class R3 Shares)		 $51 0.99%
*
This charge is annualized.
Expenses Paid, Amount $ 51
Expense Ratio, Percent 0.99% [32]
Net Assets $ 5,516,014,000
Holdings Count | Holding 782
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $5,516,014
Total number of portfolio holdings $782
Portfolio turnover rate $11 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000192735 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan High Yield Fund
Class Name Class R4 Shares
Trading Symbol JRJKX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan High Yield Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan High Yield Fund
(Class R4 Shares)		 $38 0.74%
*
This charge is annualized.
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.74% [33]
Net Assets $ 5,516,014,000
Holdings Count | Holding 782
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $5,516,014
Total number of portfolio holdings $782
Portfolio turnover rate $11 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000033521 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan High Yield Fund
Class Name Class R5 Shares
Trading Symbol JYHRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan High Yield Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan High Yield Fund
(Class R5 Shares)		 $31 0.59%
*
This charge is annualized.
Expenses Paid, Amount $ 31
Expense Ratio, Percent 0.59% [34]
Net Assets $ 5,516,014,000
Holdings Count | Holding 782
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $5,516,014
Total number of portfolio holdings $782
Portfolio turnover rate $11 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000009640 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan High Yield Fund
Class Name Class R6 Shares
Trading Symbol JHYUX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan High Yield Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan High Yield Fund
(Class R6 Shares)		 $25 0.49%
*
This charge is annualized.
Expenses Paid, Amount $ 25
Expense Ratio, Percent 0.49% [35]
Net Assets $ 5,516,014,000
Holdings Count | Holding 782
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $5,516,014
Total number of portfolio holdings $782
Portfolio turnover rate $11 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000009692 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Short-Intermediate Municipal Bond Fund
Class Name Class A Shares
Trading Symbol OSTAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Short-Intermediate Municipal Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Short-Intermediate Municipal Bond Fund
(Class A Shares)		 $35 0.69%
*
This charge is annualized.
Expenses Paid, Amount $ 35
Expense Ratio, Percent 0.69% [36]
Net Assets $ 762,245,000
Holdings Count | Holding 366
Investment Company Portfolio Turnover 33.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $762,245
Total number of portfolio holdings $366
Portfolio turnover rate $33 %
Holdings [Text Block]
CREDIT QUALITY ALLOCATIONS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000009647 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Mortgage-Backed Securities Fund
Class Name Class A Shares
Trading Symbol OMBAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Mortgage-Backed Securities Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Mortgage-Backed Securities Fund
(Class A Shares)		 $33 0.63%
*
This charge is annualized.
Expenses Paid, Amount $ 33
Expense Ratio, Percent 0.63% [37]
Net Assets $ 5,847,588,000
Holdings Count | Holding 2,404
Investment Company Portfolio Turnover 46.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $5,847,588
Total number of portfolio holdings $2,404
Portfolio turnover rate $46 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000116212 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Mortgage-Backed Securities Fund
Class Name Class C Shares
Trading Symbol OBBCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Mortgage-Backed Securities Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Mortgage-Backed Securities Fund
(Class C Shares)		 $58 1.13%
*
This charge is annualized.
Expenses Paid, Amount $ 58
Expense Ratio, Percent 1.13% [38]
Net Assets $ 5,847,588,000
Holdings Count | Holding 2,404
Investment Company Portfolio Turnover 46.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $5,847,588
Total number of portfolio holdings $2,404
Portfolio turnover rate $46 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000009646 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Mortgage-Backed Securities Fund
Class Name Class I Shares
Trading Symbol OMBIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Mortgage-Backed Securities Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Mortgage-Backed Securities Fund
(Class I Shares)		 $20 0.38%
*
This charge is annualized.
Expenses Paid, Amount $ 20
Expense Ratio, Percent 0.38% [39]
Net Assets $ 5,847,588,000
Holdings Count | Holding 2,404
Investment Company Portfolio Turnover 46.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $5,847,588
Total number of portfolio holdings $2,404
Portfolio turnover rate $46 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000009648 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Mortgage-Backed Securities Fund
Class Name Class R6 Shares
Trading Symbol JMBUX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Mortgage-Backed Securities Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Mortgage-Backed Securities Fund
(Class R6 Shares)		 $12 0.23%
*
This charge is annualized.
Expenses Paid, Amount $ 12
Expense Ratio, Percent 0.23% [40]
Net Assets $ 5,847,588,000
Holdings Count | Holding 2,404
Investment Company Portfolio Turnover 46.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $5,847,588
Total number of portfolio holdings $2,404
Portfolio turnover rate $46 %
Holdings [Text Block]
PORTFOLIO COMPOSITION - ASSET CLASS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000009697 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Tax Free Bond Fund
Class Name Class A Shares
Trading Symbol PMBAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Tax Free Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Tax Free Bond Fund
(Class A Shares)		 $34 0.66%
*
This charge is annualized.
Expenses Paid, Amount $ 34
Expense Ratio, Percent 0.66% [41]
Net Assets $ 642,341,000
Holdings Count | Holding 292
Investment Company Portfolio Turnover 38.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $642,341
Total number of portfolio holdings $292
Portfolio turnover rate $38 %
Holdings [Text Block]
CREDIT QUALITY ALLOCATIONS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000009695 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Tax Free Bond Fund
Class Name Class C Shares
Trading Symbol JTFCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Tax Free Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Tax Free Bond Fund
(Class C Shares)		 $63 1.24%
*
This charge is annualized.
Expenses Paid, Amount $ 63
Expense Ratio, Percent 1.24% [42]
Net Assets $ 642,341,000
Holdings Count | Holding 292
Investment Company Portfolio Turnover 38.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $642,341
Total number of portfolio holdings $292
Portfolio turnover rate $38 %
Holdings [Text Block]
CREDIT QUALITY ALLOCATIONS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000009696 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Tax Free Bond Fund
Class Name Class I Shares
Trading Symbol PRBIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Tax Free Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Tax Free Bond Fund
(Class I Shares)		 $22 0.44%
*
This charge is annualized.
Expenses Paid, Amount $ 22
Expense Ratio, Percent 0.44% [43]
Net Assets $ 642,341,000
Holdings Count | Holding 292
Investment Company Portfolio Turnover 38.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $642,341
Total number of portfolio holdings $292
Portfolio turnover rate $38 %
Holdings [Text Block]
CREDIT QUALITY ALLOCATIONS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000205208 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Tax Free Bond Fund
Class Name Class R6 Shares
Trading Symbol RUNFX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Tax Free Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Tax Free Bond Fund
(Class R6 Shares)		 $20 0.39%
*
This charge is annualized.
Expenses Paid, Amount $ 20
Expense Ratio, Percent 0.39% [44]
Net Assets $ 642,341,000
Holdings Count | Holding 292
Investment Company Portfolio Turnover 38.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $642,341
Total number of portfolio holdings $292
Portfolio turnover rate $38 %
Holdings [Text Block]
CREDIT QUALITY ALLOCATIONS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000212348 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan U.S. Government Money Market Fund
Class Name Academy Shares
Trading Symbol JGAXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan U.S. Government Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorgan.com/academy. You can also request this information by contacting us at 1-646-341-6869 or by sending an e-mail request to funds@academysecurities.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-646-341-6869
Additional Information Email funds@academysecurities.com
Additional Information Website www.jpmorgan.com/academy
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan U.S. Government Money Market Fund
(Academy Shares)		 $9 0.17%
*
This charge is annualized.
Expenses Paid, Amount $ 9
Expense Ratio, Percent 0.17% [45]
Net Assets $ 266,456,580,000
Holdings Count | Holding 181
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $266,456,580
Total number of portfolio holdings $181
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 66.5
8–30 calendar days 4.4
31–60 calendar days 3.1
61–90 calendar days 10.5
91–180 calendar days 11.2
181+ calendar days 4.3
C000010945 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan U.S. Government Money Market Fund
Class Name Agency Shares
Trading Symbol OGAXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan U.S. Government Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block]  You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-766-7722 or by sending an e-mail request to global_liquidity_funds_services_us@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-766-7722
Additional Information Email global_liquidity_funds_services_us@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan U.S. Government Money Market Fund
(Agency Shares)		 $13 0.26%
*
This charge is annualized.
Expenses Paid, Amount $ 13
Expense Ratio, Percent 0.26% [46]
Net Assets $ 266,456,580,000
Holdings Count | Holding 181
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $266,456,580
Total number of portfolio holdings $181
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 66.5
8–30 calendar days 4.4
31–60 calendar days 3.1
61–90 calendar days 10.5
91–180 calendar days 11.2
181+ calendar days 4.3
C000010941 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan U.S. Government Money Market Fund
Class Name Capital Shares
Trading Symbol OGVXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan U.S. Government Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-766-7722 or by sending an e-mail request to global_liquidity_funds_services_us@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-766-7722
Additional Information Email global_liquidity_funds_services_us@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan U.S. Government Money Market Fund
(Capital Shares)		 $9 0.17%
*
This charge is annualized.
Expenses Paid, Amount $ 9
Expense Ratio, Percent 0.17% [47]
Net Assets $ 266,456,580,000
Holdings Count | Holding 181
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $266,456,580
Total number of portfolio holdings $181
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 66.5
8–30 calendar days 4.4
31–60 calendar days 3.1
61–90 calendar days 10.5
91–180 calendar days 11.2
181+ calendar days 4.3
C000225258 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan U.S. Government Money Market Fund
Class Name Empower Shares
Trading Symbol EJGXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan U.S. Government Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan U.S. Government Money Market Fund
(Empower Shares)		 $9 0.17%
*
This charge is annualized.
Expenses Paid, Amount $ 9
Expense Ratio, Percent 0.17% [48]
Net Assets $ 266,456,580,000
Holdings Count | Holding 181
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $266,456,580
Total number of portfolio holdings $181
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 66.5
8–30 calendar days 4.4
31–60 calendar days 3.1
61–90 calendar days 10.5
91–180 calendar days 11.2
181+ calendar days 4.3
C000115393 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan U.S. Government Money Market Fund
Class Name IM Shares
Trading Symbol MGMXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan U.S. Government Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/jpmfpages/imshares. You can also request this information by contacting us at 1-800-766-7722 or by sending an e-mail request to global_liquidity_funds_services_us@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-766-7722
Additional Information Email global_liquidity_funds_services_us@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/jpmfpages/imshares
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan U.S. Government Money Market Fund
(IM Shares)		 $6 0.12%
*
This charge is annualized.
Expenses Paid, Amount $ 6
Expense Ratio, Percent 0.12% [49]
Net Assets $ 266,456,580,000
Holdings Count | Holding 181
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $266,456,580
Total number of portfolio holdings $181
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 66.5
8–30 calendar days 4.4
31–60 calendar days 3.1
61–90 calendar days 10.5
91–180 calendar days 11.2
181+ calendar days 4.3
C000010940 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan U.S. Government Money Market Fund
Class Name Institutional Class Shares
Trading Symbol IJGXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan U.S. Government Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-766-7722 or by sending an e-mail request to global_liquidity_funds_services_us@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-766-7722
Additional Information Email global_liquidity_funds_services_us@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan U.S. Government Money Market Fund
(Institutional Class Shares)		 $11 0.21%
*
This charge is annualized.
Expenses Paid, Amount $ 11
Expense Ratio, Percent 0.21% [50]
Net Assets $ 266,456,580,000
Holdings Count | Holding 181
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $266,456,580
Total number of portfolio holdings $181
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 66.5
8–30 calendar days 4.4
31–60 calendar days 3.1
61–90 calendar days 10.5
91–180 calendar days 11.2
181+ calendar days 4.3
C000078417 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan U.S. Government Money Market Fund
Class Name Investor Shares
Trading Symbol JGMXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan U.S. Government Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-766-7722 or by sending an e-mail request to global_liquidity_funds_services_us@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-766-7722
Additional Information Email global_liquidity_funds_services_us@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan U.S. Government Money Market Fund
(Investor Shares)		 $24 0.47%
*
This charge is annualized.
Expenses Paid, Amount $ 24
Expense Ratio, Percent 0.47% [51]
Net Assets $ 266,456,580,000
Holdings Count | Holding 181
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $266,456,580
Total number of portfolio holdings $181
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 66.5
8–30 calendar days 4.4
31–60 calendar days 3.1
61–90 calendar days 10.5
91–180 calendar days 11.2
181+ calendar days 4.3
C000010942 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan U.S. Government Money Market Fund
Class Name Morgan Shares
Trading Symbol MJGXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan U.S. Government Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan U.S. Government Money Market Fund
(Morgan Shares)		 $29 0.57%
*
This charge is annualized.
Expenses Paid, Amount $ 29
Expense Ratio, Percent 0.57% [52]
Net Assets $ 266,456,580,000
Holdings Count | Holding 181
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $266,456,580
Total number of portfolio holdings $181
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 66.5
8–30 calendar days 4.4
31–60 calendar days 3.1
61–90 calendar days 10.5
91–180 calendar days 11.2
181+ calendar days 4.3
C000010943 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan U.S. Government Money Market Fund
Class Name Premier Shares
Trading Symbol OGSXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan U.S. Government Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-766-7722 or by sending an e-mail request to global_liquidity_funds_services_us@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-766-7722
Additional Information Email global_liquidity_funds_services_us@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan U.S. Government Money Market Fund
(Premier Shares)		 $21 0.42%
*
This charge is annualized.
Expenses Paid, Amount $ 21
Expense Ratio, Percent 0.42% [53]
Net Assets $ 266,456,580,000
Holdings Count | Holding 181
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $266,456,580
Total number of portfolio holdings $181
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 66.5
8–30 calendar days 4.4
31–60 calendar days 3.1
61–90 calendar days 10.5
91–180 calendar days 11.2
181+ calendar days 4.3
C000010944 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan U.S. Government Money Market Fund
Class Name Reserve Shares
Trading Symbol RJGXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan U.S. Government Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-766-7722 or by sending an e-mail request to global_liquidity_funds_services_us@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-766-7722
Additional Information Email global_liquidity_funds_services_us@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan U.S. Government Money Market Fund
(Reserve Shares)		 $34 0.67%
*
This charge is annualized.
Expenses Paid, Amount $ 34
Expense Ratio, Percent 0.67% [54]
Net Assets $ 266,456,580,000
Holdings Count | Holding 181
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $266,456,580
Total number of portfolio holdings $181
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 66.5
8–30 calendar days 4.4
31–60 calendar days 3.1
61–90 calendar days 10.5
91–180 calendar days 11.2
181+ calendar days 4.3
C000010946 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan U.S. Government Money Market Fund
Class Name Service Shares
Trading Symbol SJGXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan U.S. Government Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-766-7722 or by sending an e-mail request to global_liquidity_funds_services_us@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-766-7722
Additional Information Email global_liquidity_funds_services_us@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan U.S. Government Money Market Fund
(Service Shares)		 $52 1.02%
*
This charge is annualized.
Expenses Paid, Amount $ 52
Expense Ratio, Percent 1.02% [55]
Net Assets $ 266,456,580,000
Holdings Count | Holding 181
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $266,456,580
Total number of portfolio holdings $181
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 66.5
8–30 calendar days 4.4
31–60 calendar days 3.1
61–90 calendar days 10.5
91–180 calendar days 11.2
181+ calendar days 4.3
C000010926 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Liquid Assets Money Market Fund
Class Name Agency Shares
Trading Symbol AJLXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Liquid Assets Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-766-7722 or by sending an e-mail request to global_liquidity_funds_services_us@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-766-7722
Additional Information Email global_liquidity_funds_services_us@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Liquid Assets Money Market Fund
(Agency Shares)		 $13 0.26%
*
This charge is annualized.
Expenses Paid, Amount $ 13
Expense Ratio, Percent 0.26% [56]
Net Assets $ 67,662,383,000
Holdings Count | Holding 451
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $67,662,383
Total number of portfolio holdings $451
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 68.7
8–30 calendar days 5.2
31–60 calendar days 6.8
61–90 calendar days 3.0
91–180 calendar days 8.0
181+ calendar days 8.3
C000010922 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Liquid Assets Money Market Fund
Class Name Capital Shares
Trading Symbol CJLXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Liquid Assets Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-766-7722 or by sending an e-mail request to global_liquidity_funds_services_us@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-766-7722
Additional Information Email global_liquidity_funds_services_us@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Liquid Assets Money Market Fund
(Capital Shares)		 $9 0.18%
*
This charge is annualized.
Expenses Paid, Amount $ 9
Expense Ratio, Percent 0.18% [57]
Net Assets $ 67,662,383,000
Holdings Count | Holding 451
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $67,662,383
Total number of portfolio holdings $451
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 68.7
8–30 calendar days 5.2
31–60 calendar days 6.8
61–90 calendar days 3.0
91–180 calendar days 8.0
181+ calendar days 8.3
C000010918 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Liquid Assets Money Market Fund
Class Name Institutional Class Shares
Trading Symbol IJLXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Liquid Assets Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-766-7722 or by sending an e-mail request to global_liquidity_funds_services_us@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-766-7722
Additional Information Email global_liquidity_funds_services_us@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Liquid Assets Money Market Fund
(Institutional Class Shares)		 $11 0.21%
*
This charge is annualized.
Expenses Paid, Amount $ 11
Expense Ratio, Percent 0.21% [58]
Net Assets $ 67,662,383,000
Holdings Count | Holding 451
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $67,662,383
Total number of portfolio holdings $451
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 68.7
8–30 calendar days 5.2
31–60 calendar days 6.8
61–90 calendar days 3.0
91–180 calendar days 8.0
181+ calendar days 8.3
C000010927 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Liquid Assets Money Market Fund
Class Name Investor Shares
Trading Symbol HLPXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Liquid Assets Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-766-7722 or by sending an e-mail request to global_liquidity_funds_services_us@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-766-7722
Additional Information Email global_liquidity_funds_services_us@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Liquid Assets Money Market Fund
(Investor Shares)		 $25 0.49%
*
This charge is annualized.
Expenses Paid, Amount $ 25
Expense Ratio, Percent 0.49% [59]
Net Assets $ 67,662,383,000
Holdings Count | Holding 451
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $67,662,383
Total number of portfolio holdings $451
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 68.7
8–30 calendar days 5.2
31–60 calendar days 6.8
61–90 calendar days 3.0
91–180 calendar days 8.0
181+ calendar days 8.3
C000010923 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Liquid Assets Money Market Fund
Class Name Morgan Shares
Trading Symbol MJLXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Liquid Assets Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Liquid Assets Money Market Fund
(Morgan Shares)		 $30 0.58%
*
This charge is annualized.
Expenses Paid, Amount $ 30
Expense Ratio, Percent 0.58% [60]
Net Assets $ 67,662,383,000
Holdings Count | Holding 451
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $67,662,383
Total number of portfolio holdings $451
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 68.7
8–30 calendar days 5.2
31–60 calendar days 6.8
61–90 calendar days 3.0
91–180 calendar days 8.0
181+ calendar days 8.3
C000010924 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Liquid Assets Money Market Fund
Class Name Premier Shares
Trading Symbol PJLXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Liquid Assets Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-766-7722 or by sending an e-mail request to global_liquidity_funds_services_us@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-766-7722
Additional Information Email global_liquidity_funds_services_us@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Liquid Assets Money Market Fund
(Premier Shares)		 $22 0.43%
*
This charge is annualized.
Expenses Paid, Amount $ 22
Expense Ratio, Percent 0.43% [61]
Net Assets $ 67,662,383,000
Holdings Count | Holding 451
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $67,662,383
Total number of portfolio holdings $451
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 68.7
8–30 calendar days 5.2
31–60 calendar days 6.8
61–90 calendar days 3.0
91–180 calendar days 8.0
181+ calendar days 8.3
C000010925 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Liquid Assets Money Market Fund
Class Name Reserve Shares
Trading Symbol HPIXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Liquid Assets Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-766-7722 or by sending an e-mail request to global_liquidity_funds_services_us@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-766-7722
Additional Information Email global_liquidity_funds_services_us@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Liquid Assets Money Market Fund
(Reserve Shares)		 $35 0.69%
*
This charge is annualized.
Expenses Paid, Amount $ 35
Expense Ratio, Percent 0.69% [62]
Net Assets $ 67,662,383,000
Holdings Count | Holding 451
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $67,662,383
Total number of portfolio holdings $451
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 68.7
8–30 calendar days 5.2
31–60 calendar days 6.8
61–90 calendar days 3.0
91–180 calendar days 8.0
181+ calendar days 8.3
C000222399 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan U.S. Treasury Plus Money Market Fund
Class Name Academy Shares
Trading Symbol JPCXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan U.S. Treasury Plus Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorgan.com/academy. You can also request this information by contacting us at 1-646-341-6869 or by sending an e-mail request to funds@academysecurities.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-646-341-6869
Additional Information Email funds@academysecurities.com
Additional Information Website www.jpmorgan.com/academy
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan U.S. Treasury Plus Money Market Fund
(Academy Shares)		 $9 0.17%
*
This charge is annualized.
Expenses Paid, Amount $ 9
Expense Ratio, Percent 0.17% [63]
Net Assets $ 39,987,842,000
Holdings Count | Holding 86
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $39,987,842
Total number of portfolio holdings $86
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 56.7
8–30 calendar days 10.2
31–60 calendar days 8.1
61–90 calendar days 5.3
91–180 calendar days 16.0
181+ calendar days 3.7
C000010953 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan U.S. Treasury Plus Money Market Fund
Class Name Agency Shares
Trading Symbol AJTXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan U.S. Treasury Plus Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-766-7722 or by sending an e-mail request to global_liquidity_funds_services_us@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-766-7722
Additional Information Email global_liquidity_funds_services_us@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan U.S. Treasury Plus Money Market Fund
(Agency Shares)		 $13 0.26%
*
This charge is annualized.
Expenses Paid, Amount $ 13
Expense Ratio, Percent 0.26% [64]
Net Assets $ 39,987,842,000
Holdings Count | Holding 86
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $39,987,842
Total number of portfolio holdings $86
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 56.7
8–30 calendar days 10.2
31–60 calendar days 8.1
61–90 calendar days 5.3
91–180 calendar days 16.0
181+ calendar days 3.7
C000165408 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan U.S. Treasury Plus Money Market Fund
Class Name Capital Shares
Trading Symbol JTCXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan U.S. Treasury Plus Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-766-7722 or by sending an e-mail request to global_liquidity_funds_services_us@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-766-7722
Additional Information Email global_liquidity_funds_services_us@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan U.S. Treasury Plus Money Market Fund
(Capital Shares)		 $9 0.17%
*
This charge is annualized.
Expenses Paid, Amount $ 9
Expense Ratio, Percent 0.17% [65]
Net Assets $ 39,987,842,000
Holdings Count | Holding 86
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $39,987,842
Total number of portfolio holdings $86
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 56.7
8–30 calendar days 10.2
31–60 calendar days 8.1
61–90 calendar days 5.3
91–180 calendar days 16.0
181+ calendar days 3.7
C000225259 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan U.S. Treasury Plus Money Market Fund
Class Name Empower Shares
Trading Symbol EJUXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan U.S. Treasury Plus Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan U.S. Treasury Plus Money Market Fund
(Empower Shares)		 $9 0.17%
*
This charge is annualized.
Expenses Paid, Amount $ 9
Expense Ratio, Percent 0.17% [66]
Net Assets $ 39,987,842,000
Holdings Count | Holding 86
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $39,987,842
Total number of portfolio holdings $86
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 56.7
8–30 calendar days 10.2
31–60 calendar days 8.1
61–90 calendar days 5.3
91–180 calendar days 16.0
181+ calendar days 3.7
C000115394 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan U.S. Treasury Plus Money Market Fund
Class Name IM Shares
Trading Symbol MJPXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan U.S. Treasury Plus Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/jpmfpages/imshares. You can also request this information by contacting us at 1-800-766-7722 or by sending an e-mail request to global_liquidity_funds_services_us@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-766-7722
Additional Information Email global_liquidity_funds_services_us@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/jpmfpages/imshares
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan U.S. Treasury Plus Money Market Fund
(IM Shares)		 $6 0.12%
*
This charge is annualized.
Expenses Paid, Amount $ 6
Expense Ratio, Percent 0.12% [67]
Net Assets $ 39,987,842,000
Holdings Count | Holding 86
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $39,987,842
Total number of portfolio holdings $86
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 56.7
8–30 calendar days 10.2
31–60 calendar days 8.1
61–90 calendar days 5.3
91–180 calendar days 16.0
181+ calendar days 3.7
C000010947 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan U.S. Treasury Plus Money Market Fund
Class Name Institutional Class Shares
Trading Symbol IJTXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan U.S. Treasury Plus Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-766-7722 or by sending an e-mail request to global_liquidity_funds_services_us@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-766-7722
Additional Information Email global_liquidity_funds_services_us@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan U.S. Treasury Plus Money Market Fund
(Institutional Class Shares)		 $11 0.21%
*
This charge is annualized.
Expenses Paid, Amount $ 11
Expense Ratio, Percent 0.21% [68]
Net Assets $ 39,987,842,000
Holdings Count | Holding 86
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $39,987,842
Total number of portfolio holdings $86
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 56.7
8–30 calendar days 10.2
31–60 calendar days 8.1
61–90 calendar days 5.3
91–180 calendar days 16.0
181+ calendar days 3.7
C000010954 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan U.S. Treasury Plus Money Market Fund
Class Name Investor Shares
Trading Symbol HGOXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan U.S. Treasury Plus Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-766-7722 or by sending an e-mail request to global_liquidity_funds_services_us@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-766-7722
Additional Information Email global_liquidity_funds_services_us@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan U.S. Treasury Plus Money Market Fund
(Investor Shares)		 $24 0.47%
*
This charge is annualized.
Expenses Paid, Amount $ 24
Expense Ratio, Percent 0.47% [69]
Net Assets $ 39,987,842,000
Holdings Count | Holding 86
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $39,987,842
Total number of portfolio holdings $86
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 56.7
8–30 calendar days 10.2
31–60 calendar days 8.1
61–90 calendar days 5.3
91–180 calendar days 16.0
181+ calendar days 3.7
C000010950 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan U.S. Treasury Plus Money Market Fund
Class Name Morgan Shares
Trading Symbol MJTXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan U.S. Treasury Plus Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan U.S. Treasury Plus Money Market Fund
(Morgan Shares)		 $29 0.57%
*
This charge is annualized.
Expenses Paid, Amount $ 29
Expense Ratio, Percent 0.57% [70]
Net Assets $ 39,987,842,000
Holdings Count | Holding 86
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $39,987,842
Total number of portfolio holdings $86
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 56.7
8–30 calendar days 10.2
31–60 calendar days 8.1
61–90 calendar days 5.3
91–180 calendar days 16.0
181+ calendar days 3.7
C000010951 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan U.S. Treasury Plus Money Market Fund
Class Name Premier Shares
Trading Symbol PJTXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan U.S. Treasury Plus Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-766-7722 or by sending an e-mail request to global_liquidity_funds_services_us@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-766-7722
Additional Information Email global_liquidity_funds_services_us@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan U.S. Treasury Plus Money Market Fund
(Premier Shares)		 $22 0.42%
*
This charge is annualized.
Expenses Paid, Amount $ 22
Expense Ratio, Percent 0.42% [71]
Net Assets $ 39,987,842,000
Holdings Count | Holding 86
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $39,987,842
Total number of portfolio holdings $86
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 56.7
8–30 calendar days 10.2
31–60 calendar days 8.1
61–90 calendar days 5.3
91–180 calendar days 16.0
181+ calendar days 3.7
C000010952 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan U.S. Treasury Plus Money Market Fund
Class Name Reserve Shares
Trading Symbol HTIXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan U.S. Treasury Plus Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-766-7722 or by sending an e-mail request to global_liquidity_funds_services_us@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-766-7722
Additional Information Email global_liquidity_funds_services_us@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan U.S. Treasury Plus Money Market Fund
(Reserve Shares)		 $34 0.67%
*
This charge is annualized.
Expenses Paid, Amount $ 34
Expense Ratio, Percent 0.67% [72]
Net Assets $ 39,987,842,000
Holdings Count | Holding 86
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $39,987,842
Total number of portfolio holdings $86
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 56.7
8–30 calendar days 10.2
31–60 calendar days 8.1
61–90 calendar days 5.3
91–180 calendar days 16.0
181+ calendar days 3.7
C000009694 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Short-Intermediate Municipal Bond Fund
Class Name Class C Shares
Trading Symbol STMCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Short-Intermediate Municipal Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Short-Intermediate Municipal Bond Fund
(Class C Shares)		 $60 1.19%
*
This charge is annualized.
Expenses Paid, Amount $ 60
Expense Ratio, Percent 1.19% [73]
Net Assets $ 762,245,000
Holdings Count | Holding 366
Investment Company Portfolio Turnover 33.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $762,245
Total number of portfolio holdings $366
Portfolio turnover rate $33 %
Holdings [Text Block]
CREDIT QUALITY ALLOCATIONS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000077258 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Short-Intermediate Municipal Bond Fund
Class Name Class I Shares
Trading Symbol JIMIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Short-Intermediate Municipal Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Short-Intermediate Municipal Bond Fund
(Class I Shares)		 $12 0.24%
*
This charge is annualized.
Expenses Paid, Amount $ 12
Expense Ratio, Percent 0.24% [74]
Net Assets $ 762,245,000
Holdings Count | Holding 366
Investment Company Portfolio Turnover 33.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $762,245
Total number of portfolio holdings $366
Portfolio turnover rate $33 %
Holdings [Text Block]
CREDIT QUALITY ALLOCATIONS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000205207 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Short-Intermediate Municipal Bond Fund
Class Name Class R6 Shares
Trading Symbol OSTSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Short-Intermediate Municipal Bond Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Short-Intermediate Municipal Bond Fund
(Class R6 Shares)		 $10 0.19%
*
This charge is annualized.
Expenses Paid, Amount $ 10
Expense Ratio, Percent 0.19% [75]
Net Assets $ 762,245,000
Holdings Count | Holding 366
Investment Company Portfolio Turnover 33.00%
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $762,245
Total number of portfolio holdings $366
Portfolio turnover rate $33 %
Holdings [Text Block]
CREDIT QUALITY ALLOCATIONS
(% of Total Investments)
Graphical Representation - Allocation 1 Chart
C000010932 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Municipal Money Market Fund
Class Name Agency Shares
Trading Symbol JMAXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Municipal Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block]  You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-766-7722 or by sending an e-mail request to global_liquidity_funds_services_us@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-766-7722
Additional Information Email global_liquidity_funds_services_us@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Municipal Money Market Fund
(Agency Shares)		 $13 0.26%
*
This charge is annualized.
Expenses Paid, Amount $ 13
Expense Ratio, Percent 0.26% [76]
Net Assets $ 2,011,764,000
Holdings Count | Holding 258
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $2,011,764
Total number of portfolio holdings $258
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 23.6
8–30 calendar days 48.5
31–60 calendar days 9.5
61–90 calendar days 7.5
91–180 calendar days 3.5
181+ calendar days 7.4
C000010928 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Municipal Money Market Fund
Class Name Institutional Class Shares
Trading Symbol IJMXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Municipal Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-766-7722 or by sending an e-mail request to global_liquidity_funds_services_us@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-766-7722
Additional Information Email global_liquidity_funds_services_us@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Municipal Money Market Fund
(Institutional Class Shares)		 $11 0.21%
*
This charge is annualized.
Expenses Paid, Amount $ 11
Expense Ratio, Percent 0.21% [77]
Net Assets $ 2,011,764,000
Holdings Count | Holding 258
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $2,011,764
Total number of portfolio holdings $258
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 23.6
8–30 calendar days 48.5
31–60 calendar days 9.5
61–90 calendar days 7.5
91–180 calendar days 3.5
181+ calendar days 7.4
C000010929 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Municipal Money Market Fund
Class Name Morgan Shares
Trading Symbol MJMXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Municipal Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111 or by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-480-4111
Additional Information Email Funds.Website.Support@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Municipal Money Market Fund
(Morgan Shares)		 $30 0.59%
*
This charge is annualized.
Expenses Paid, Amount $ 30
Expense Ratio, Percent 0.59% [78]
Net Assets $ 2,011,764,000
Holdings Count | Holding 258
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $2,011,764
Total number of portfolio holdings $258
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 23.6
8–30 calendar days 48.5
31–60 calendar days 9.5
61–90 calendar days 7.5
91–180 calendar days 3.5
181+ calendar days 7.4
C000010930 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Municipal Money Market Fund
Class Name Premier Shares
Trading Symbol HTOXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Municipal Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-766-7722 or by sending an e-mail request to global_liquidity_funds_services_us@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-766-7722
Additional Information Email global_liquidity_funds_services_us@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Municipal Money Market Fund
(Premier Shares)		 $22 0.44%
*
This charge is annualized.
Expenses Paid, Amount $ 22
Expense Ratio, Percent 0.44% [79]
Net Assets $ 2,011,764,000
Holdings Count | Holding 258
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $2,011,764
Total number of portfolio holdings $258
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 23.6
8–30 calendar days 48.5
31–60 calendar days 9.5
61–90 calendar days 7.5
91–180 calendar days 3.5
181+ calendar days 7.4
C000010933 [Member]  
Shareholder Report [Line Items]  
Fund Name JPMorgan Municipal Money Market Fund
Class Name Service Shares
Trading Symbol SJMXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the JPMorgan Municipal Money Market Fund for the period March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-766-7722 or by sending an e-mail request to global_liquidity_funds_services_us@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund.
Additional Information Phone Number 1-800-766-7722
Additional Information Email global_liquidity_funds_services_us@jpmorganfunds.com
Additional Information Website www.jpmorganfunds.com/funddocuments
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Fund (Class) Costs of a
$10,000 investment		 Costs paid as a percentage
of a $10,000 investment*
JPMorgan Municipal Money Market Fund
(Service Shares)		 $53 1.04%
*
This charge is annualized.
Expenses Paid, Amount $ 53
Expense Ratio, Percent 1.04% [80]
Net Assets $ 2,011,764,000
Holdings Count | Holding 258
Additional Fund Statistics [Text Block]

KEY FUND STATISTICS
Fund net assets (000's) $2,011,764
Total number of portfolio holdings $258
Holdings [Text Block]
EFFECTIVE MATURITY
(% of total investments)
2–7 calendar days 23.6
8–30 calendar days 48.5
31–60 calendar days 9.5
61–90 calendar days 7.5
91–180 calendar days 3.5
181+ calendar days 7.4
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