v3.25.2
Shareholder Report
 12 Months Ended
Jul. 31, 2025
USD ($)
$ / shares
Shareholder Report [Line Items]  
Document Type N-CSR
Amendment Flag false
Registrant Name Putnam Investment Funds
Entity Central Index Key 0000932101
Entity Investment Company Type N-1A
Document Period End Date Jul. 31, 2025
Class A  
Shareholder Report [Line Items]  
Fund Name Putnam Large Cap Growth Fund
Class Name Class A
Trading Symbol POGAX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Putnam Large Cap Growth Fund for the period August 1, 2024, to July 31, 2025.
Shareholder Report Annual or Semi-Annual annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at (800) 225-1581.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number (800) 225-1581
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST YEAR? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*
Class A
$103
0.93%
[1]
Expenses Paid, Amount $ 103
Expense Ratio, Percent 0.93%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
For the twelve months ended July 31, 2025, Class A shares of Putnam Large Cap Growth Fund returned 21.47%. The Fund compares its performance to the Russell 1000 Growth Index, which returned 23.75% for the same period.
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
↑
Overweight position in Broadcom, a semiconductor and software company
↑
Not owning Merck, a pharmaceutical company
↑
Overweight position in Netflix
Top detractors from performance:
↓
Underweight exposure to Palantir Technologies
↓
Overweight position in Salesforce, a cloud-based software company
↓
Out-of-benchmark position in Canadian Pacific Kansas City Railway
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.
Line Graph [Table Text Block]
image
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended July 31, 2025
 
1 Year
5 Year
10 Year
Class A
21.47
14.86
16.48
Class A (with sales charge)
14.49
13.51
15.79
Russell 3000 Index
15.68
15.19
13.02
Russell 1000 Growth Index
23.75
17.27
17.06
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
Material Change Date Aug. 01, 2024
Updated Performance Information Location [Text Block]
For current month-end performance, please call Franklin Templeton at (800) 225-1581 or visit
https://www.franklintempleton.com/investments/options/mutual-funds.
Important data provider notices and terms available at www.franklintempletondatasources.com.
Net Assets $ 12,839,766,564
Holdings Count | $ / shares 48 [2]
Advisory Fees Paid, Amount $ 61,100,092
Investment Company Portfolio Turnover 34.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of July 31, 2025)
Total Net Assets
$12,839,766,564
Total Number of Portfolio Holdings*
48
Total Management Fee Paid
$61,100,092
Portfolio Turnover Rate
34%
[2]
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of July 31, 2025)
Portfolio Composition* (% of Total Investments)
image
 [3]
Material Fund Change [Text Block]
HOW HAS THE FUND CHANGED?
Effective November 1, 2024 (the “Effective Date”), Putnam Investments Limited (“PIL”), a sub-advisor of the Fund prior to the Effective Date, merged with and into Franklin Templeton Investment Management Limited (“FTIML”), a wholly-owned subsidiary of Franklin Resources, Inc. (the “Merger”). As of the Effective Date, PIL investment professionals became employees of FTIML, and the sub-advisory agreement between Putnam Investment Management, LLC (“Putnam Management”) and PIL with respect to the Fund was terminated. In connection with the Merger, the Fund’s Trustees approved a new sub-advisory agreement between Putnam Management and FTIML, pursuant to which FTIML became a sub-advisor of the Fund on the Effective Date.
Effective September 5, 2024 (the “Conversion Date”), class B shares of the Fund acquired prior to the Conversion Date converted automatically to class A shares.
This is a summary of certain changes to the Fund since August 1, 2024. For more complete information, you may review the Fund’s current prospectus and any applicable supplements and the Fund’s next prospectus, which we expect to be available by December 1, 2025, at https://www.franklintempleton.com/regulatory-fund-documents or upon request at (800) 225-1581 or
funddocuments@putnam.com.
Updated Prospectus Phone Number (800) 225-1581
Updated Prospectus Email Address funddocuments@putnam.com
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class C  
Shareholder Report [Line Items]  
Fund Name Putnam Large Cap Growth Fund
Class Name Class C
Trading Symbol POGCX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Putnam Large Cap Growth Fund for the period August 1, 2024, to July 31, 2025.
Shareholder Report Annual or Semi-Annual annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at (800) 225-1581.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number (800) 225-1581
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST YEAR? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*
Class C
$186
1.69%
[4]
Expenses Paid, Amount $ 186
Expense Ratio, Percent 1.69%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
For the twelve months ended July 31, 2025, Class C shares of Putnam Large Cap Growth Fund returned 20.56%. The Fund compares its performance to the Russell 1000 Growth Index, which returned 23.75% for the same period.
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
↑
Overweight position in Broadcom, a semiconductor and software company
↑
Not owning Merck, a pharmaceutical company
↑
Overweight position in Netflix
Top detractors from performance:
↓
Underweight exposure to Palantir Technologies
↓
Overweight position in Salesforce, a cloud-based software company
↓
Out-of-benchmark position in Canadian Pacific Kansas City Railway
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.
Line Graph [Table Text Block]
image
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended July 31, 2025
 
1 Year
5 Year
10 Year
Class C
20.56
14.00
15.79
Class C (with sales charge)
19.56
14.00
15.79
Russell 3000 Index
15.68
15.19
13.02
Russell 1000 Growth Index
23.75
17.27
17.06
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
Material Change Date Aug. 01, 2024
Updated Performance Information Location [Text Block]
For current month-end performance, please call Franklin Templeton at (800) 225-1581 or visit
https://www.franklintempleton.com/investments/options/mutual-funds.
Important data provider notices and terms available at www.franklintempletondatasources.com.
Net Assets $ 12,839,766,564
Holdings Count | $ / shares 48 [5]
Advisory Fees Paid, Amount $ 61,100,092
Investment Company Portfolio Turnover 34.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of July 31, 2025)
Total Net Assets
$12,839,766,564
Total Number of Portfolio Holdings*
48
Total Management Fee Paid
$61,100,092
Portfolio Turnover Rate
34%
[5]
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of July 31, 2025)
Portfolio Composition* (% of Total Investments)
image
 [6]
Material Fund Change [Text Block]
HOW HAS THE FUND CHANGED?
Effective November 1, 2024 (the “Effective Date”), Putnam Investments Limited (“PIL”), a sub-advisor of the Fund prior to the Effective Date, merged with and into Franklin Templeton Investment Management Limited (“FTIML”), a wholly-owned subsidiary of Franklin Resources, Inc. (the “Merger”). As of the Effective Date, PIL investment professionals became employees of FTIML, and the sub-advisory agreement between Putnam Investment Management, LLC (“Putnam Management”) and PIL with respect to the Fund was terminated. In connection with the Merger, the Fund’s Trustees approved a new sub-advisory agreement between Putnam Management and FTIML, pursuant to which FTIML became a sub-advisor of the Fund on the Effective Date.
This is a summary of certain changes to the Fund since August 1, 2024. For more complete information, you may review the Fund’s current prospectus and any applicable supplements and the Fund’s next prospectus, which we expect to be available by December 1, 2025, at https://www.franklintempleton.com/regulatory-fund-documents or upon request at (800) 225-1581 or
funddocuments@putnam.com.
Updated Prospectus Phone Number (800) 225-1581
Updated Prospectus Email Address funddocuments@putnam.com
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R  
Shareholder Report [Line Items]  
Fund Name Putnam Large Cap Growth Fund
Class Name Class R
Trading Symbol PGORX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Putnam Large Cap Growth Fund for the period August 1, 2024, to July 31, 2025.
Shareholder Report Annual or Semi-Annual annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at (800) 225-1581.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number (800) 225-1581
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST YEAR? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*
Class R
$132
1.19%
[7]
Expenses Paid, Amount $ 132
Expense Ratio, Percent 1.19%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
For the twelve months ended July 31, 2025, Class R shares of Putnam Large Cap Growth Fund returned 21.15%. The Fund compares its performance to the Russell 1000 Growth Index, which returned 23.75% for the same period.
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
↑
Overweight position in Broadcom, a semiconductor and software company
↑
Not owning Merck, a pharmaceutical company
↑
Overweight position in Netflix
Top detractors from performance:
↓
Underweight exposure to Palantir Technologies
↓
Overweight position in Salesforce, a cloud-based software company
↓
Out-of-benchmark position in Canadian Pacific Kansas City Railway
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.
Line Graph [Table Text Block]
image
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended July 31, 2025
 
1 Year
5 Year
10 Year
Class R
21.15
14.57
16.19
Russell 3000 Index
15.68
15.19
13.02
Russell 1000 Growth Index
23.75
17.27
17.06
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
Material Change Date Aug. 01, 2024
Updated Performance Information Location [Text Block]
For current month-end performance, please call Franklin Templeton at (800) 225-1581 or visit
https://www.franklintempleton.com/investments/options/mutual-funds.
Important data provider notices and terms available at www.franklintempletondatasources.com.
Net Assets $ 12,839,766,564
Holdings Count | $ / shares 48 [8]
Advisory Fees Paid, Amount $ 61,100,092
Investment Company Portfolio Turnover 34.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of July 31, 2025)
Total Net Assets
$12,839,766,564
Total Number of Portfolio Holdings*
48
Total Management Fee Paid
$61,100,092
Portfolio Turnover Rate
34%
[8]
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of July 31, 2025)
Portfolio Composition* (% of Total Investments)
image
 [9]
Material Fund Change [Text Block]
HOW HAS THE FUND CHANGED?
Effective November 1, 2024 (the “Effective Date”), Putnam Investments Limited (“PIL”), a sub-advisor of the Fund prior to the Effective Date, merged with and into Franklin Templeton Investment Management Limited (“FTIML”), a wholly-owned subsidiary of Franklin Resources, Inc. (the “Merger”). As of the Effective Date, PIL investment professionals became employees of FTIML, and the sub-advisory agreement between Putnam Investment Management, LLC (“Putnam Management”) and PIL with respect to the Fund was terminated. In connection with the Merger, the Fund’s Trustees approved a new sub-advisory agreement between Putnam Management and FTIML, pursuant to which FTIML became a sub-advisor of the Fund on the Effective Date.
This is a summary of certain changes to the Fund since August 1, 2024. For more complete information, you may review the Fund’s current prospectus and any applicable supplements and the Fund’s next prospectus, which we expect to be available by December 1, 2025, at https://www.franklintempleton.com/regulatory-fund-documents or upon request at (800) 225-1581 or
funddocuments@putnam.com.
Updated Prospectus Phone Number (800) 225-1581
Updated Prospectus Email Address funddocuments@putnam.com
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R5  
Shareholder Report [Line Items]  
Fund Name Putnam Large Cap Growth Fund
Class Name Class R5
Trading Symbol PGODX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Putnam Large Cap Growth Fund for the period August 1, 2024, to July 31, 2025.
Shareholder Report Annual or Semi-Annual annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at (800) 225-1581.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number (800) 225-1581
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST YEAR? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*
Class R5
$78
0.70%
[10]
Expenses Paid, Amount $ 78
Expense Ratio, Percent 0.70%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
For the twelve months ended July 31, 2025, Class R5 shares of Putnam Large Cap Growth Fund returned 21.75%. The Fund compares its performance to the Russell 1000 Growth Index, which returned 23.75% for the same period.
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
↑
Overweight position in Broadcom, a semiconductor and software company
↑
Not owning Merck, a pharmaceutical company
↑
Overweight position in Netflix
Top detractors from performance:
↓
Underweight exposure to Palantir Technologies
↓
Overweight position in Salesforce, a cloud-based software company
↓
Out-of-benchmark position in Canadian Pacific Kansas City Railway
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended July 31, 2025
 
1 Year
5 Year
10 Year
Class R5
21.75
15.14
16.79
Russell 3000 Index
15.68
15.19
13.02
Russell 1000 Growth Index
23.75
17.27
17.06
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
Material Change Date Aug. 01, 2024
Updated Performance Information Location [Text Block]
For current month-end performance, please call Franklin Templeton at (800) 225-1581 or visit
https://www.franklintempleton.com/investments/options/mutual-funds.
Important data provider notices and terms available at www.franklintempletondatasources.com.
Net Assets $ 12,839,766,564
Holdings Count | $ / shares 48 [11]
Advisory Fees Paid, Amount $ 61,100,092
Investment Company Portfolio Turnover 34.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of July 31, 2025)
Total Net Assets
$12,839,766,564
Total Number of Portfolio Holdings*
48
Total Management Fee Paid
$61,100,092
Portfolio Turnover Rate
34%
[11]
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of July 31, 2025)
Portfolio Composition* (% of Total Investments)
image
 [12]
Material Fund Change [Text Block]
HOW HAS THE FUND CHANGED?
Effective November 1, 2024 (the “Effective Date”), Putnam Investments Limited (“PIL”), a sub-advisor of the Fund prior to the Effective Date, merged with and into Franklin Templeton Investment Management Limited (“FTIML”), a wholly-owned subsidiary of Franklin Resources, Inc. (the “Merger”). As of the Effective Date, PIL investment professionals became employees of FTIML, and the sub-advisory agreement between Putnam Investment Management, LLC (“Putnam Management”) and PIL with respect to the Fund was terminated. In connection with the Merger, the Fund’s Trustees approved a new sub-advisory agreement between Putnam Management and FTIML, pursuant to which FTIML became a sub-advisor of the Fund on the Effective Date.
This is a summary of certain changes to the Fund since August 1, 2024. For more complete information, you may review the Fund’s current prospectus and any applicable supplements and the Fund’s next prospectus, which we expect to be available by December 1, 2025, at https://www.franklintempleton.com/regulatory-fund-documents or upon request at (800) 225-1581 or
funddocuments@putnam.com.
Updated Prospectus Phone Number (800) 225-1581
Updated Prospectus Email Address funddocuments@putnam.com
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R6  
Shareholder Report [Line Items]  
Fund Name Putnam Large Cap Growth Fund
Class Name Class R6
Trading Symbol PGOEX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Putnam Large Cap Growth Fund for the period August 1, 2024, to July 31, 2025.
Shareholder Report Annual or Semi-Annual annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at (800) 225-1581.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number (800) 225-1581
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST YEAR? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*
Class R6
$67
0.60%
[13]
Expenses Paid, Amount $ 67
Expense Ratio, Percent 0.60%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
For the twelve months ended July 31, 2025, Class R6 shares of Putnam Large Cap Growth Fund returned 21.88%. The Fund compares its performance to the Russell 1000 Growth Index, which returned 23.75% for the same period.
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
↑
Overweight position in Broadcom, a semiconductor and software company
↑
Not owning Merck, a pharmaceutical company
↑
Overweight position in Netflix
Top detractors from performance:
↓
Underweight exposure to Palantir Technologies
↓
Overweight position in Salesforce, a cloud-based software company
↓
Out-of-benchmark position in Canadian Pacific Kansas City Railway
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.
Line Graph [Table Text Block]
image
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended July 31, 2025
 
1 Year
5 Year
10 Year
Class R6
21.88
15.25
16.91
Russell 3000 Index
15.68
15.19
13.02
Russell 1000 Growth Index
23.75
17.27
17.06
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
Material Change Date Aug. 01, 2024
Updated Performance Information Location [Text Block]
For current month-end performance, please call Franklin Templeton at (800) 225-1581 or visit
https://www.franklintempleton.com/investments/options/mutual-funds.
Important data provider notices and terms available at www.franklintempletondatasources.com.
Net Assets $ 12,839,766,564
Holdings Count | $ / shares 48 [14]
Advisory Fees Paid, Amount $ 61,100,092
Investment Company Portfolio Turnover 34.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of July 31, 2025)
Total Net Assets
$12,839,766,564
Total Number of Portfolio Holdings*
48
Total Management Fee Paid
$61,100,092
Portfolio Turnover Rate
34%
[14]
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of July 31, 2025)
Portfolio Composition* (% of Total Investments)
image
 [15]
Material Fund Change [Text Block]
HOW HAS THE FUND CHANGED?
Effective November 1, 2024 (the “Effective Date”), Putnam Investments Limited (“PIL”), a sub-advisor of the Fund prior to the Effective Date, merged with and into Franklin Templeton Investment Management Limited (“FTIML”), a wholly-owned subsidiary of Franklin Resources, Inc. (the “Merger”). As of the Effective Date, PIL investment professionals became employees of FTIML, and the sub-advisory agreement between Putnam Investment Management, LLC (“Putnam Management”) and PIL with respect to the Fund was terminated. In connection with the Merger, the Fund’s Trustees approved a new sub-advisory agreement between Putnam Management and FTIML, pursuant to which FTIML became a sub-advisor of the Fund on the Effective Date.
This is a summary of certain changes to the Fund since August 1, 2024. For more complete information, you may review the Fund’s current prospectus and any applicable supplements and the Fund’s next prospectus, which we expect to be available by December 1, 2025, at https://www.franklintempleton.com/regulatory-fund-documents or upon request at (800) 225-1581 or
funddocuments@putnam.com.
Updated Prospectus Phone Number (800) 225-1581
Updated Prospectus Email Address funddocuments@putnam.com
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class Y  
Shareholder Report [Line Items]  
Fund Name Putnam Large Cap Growth Fund
Class Name Class Y
Trading Symbol PGOYX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Putnam Large Cap Growth Fund for the period August 1, 2024, to July 31, 2025.
Shareholder Report Annual or Semi-Annual annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at (800) 225-1581.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number (800) 225-1581
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST YEAR? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*
Class Y
$75
0.68%
[16]
Expenses Paid, Amount $ 75
Expense Ratio, Percent 0.68%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
For the twelve months ended July 31, 2025, Class Y shares of Putnam Large Cap Growth Fund returned 21.77%. The Fund compares its performance to the Russell 1000 Growth Index, which returned 23.75% for the same period.
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
↑
Overweight position in Broadcom, a semiconductor and software company
↑
Not owning Merck, a pharmaceutical company
↑
Overweight position in Netflix
Top detractors from performance:
↓
Underweight exposure to Palantir Technologies
↓
Overweight position in Salesforce, a cloud-based software company
↓
Out-of-benchmark position in Canadian Pacific Kansas City Railway
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.
Line Graph [Table Text Block]
image
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended July 31, 2025
 
1 Year
5 Year
10 Year
Class Y
21.77
15.15
16.77
Russell 3000 Index
15.68
15.19
13.02
Russell 1000 Growth Index
23.75
17.27
17.06
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
Material Change Date Aug. 01, 2024
Updated Performance Information Location [Text Block]
For current month-end performance, please call Franklin Templeton at (800) 225-1581 or visit
https://www.franklintempleton.com/investments/options/mutual-funds.
Important data provider notices and terms available at www.franklintempletondatasources.com.
Net Assets $ 12,839,766,564
Holdings Count | $ / shares 48 [17]
Advisory Fees Paid, Amount $ 61,100,092
Investment Company Portfolio Turnover 34.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of July 31, 2025)
Total Net Assets
$12,839,766,564
Total Number of Portfolio Holdings*
48
Total Management Fee Paid
$61,100,092
Portfolio Turnover Rate
34%
[17]
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of July 31, 2025)
Portfolio Composition* (% of Total Investments)
image
 [18]
Material Fund Change [Text Block]
HOW HAS THE FUND CHANGED?
Effective November 1, 2024 (the “Effective Date”), Putnam Investments Limited (“PIL”), a sub-advisor of the Fund prior to the Effective Date, merged with and into Franklin Templeton Investment Management Limited (“FTIML”), a wholly-owned subsidiary of Franklin Resources, Inc. (the “Merger”). As of the Effective Date, PIL investment professionals became employees of FTIML, and the sub-advisory agreement between Putnam Investment Management, LLC (“Putnam Management”) and PIL with respect to the Fund was terminated. In connection with the Merger, the Fund’s Trustees approved a new sub-advisory agreement between Putnam Management and FTIML, pursuant to which FTIML became a sub-advisor of the Fund on the Effective Date.
This is a summary of certain changes to the Fund since August 1, 2024. For more complete information, you may review the Fund’s current prospectus and any applicable supplements and the Fund’s next prospectus, which we expect to be available by December 1, 2025, at https://www.franklintempleton.com/regulatory-fund-documents or upon request at (800) 225-1581 or
funddocuments@putnam.com.
Updated Prospectus Phone Number (800) 225-1581
Updated Prospectus Email Address funddocuments@putnam.com
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
[1]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[2]
* Does not include derivatives, except purchased options, if any.  
[3]
* Does not include derivatives, except purchased options, if any.  
[4]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[5]
* Does not include derivatives, except purchased options, if any.  
[6]
* Does not include derivatives, except purchased options, if any.  
[7]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[8]
* Does not include derivatives, except purchased options, if any.  
[9]
* Does not include derivatives, except purchased options, if any.  
[10]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[11]
* Does not include derivatives, except purchased options, if any.  
[12]
* Does not include derivatives, except purchased options, if any.  
[13]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[14]
* Does not include derivatives, except purchased options, if any.  
[15]
* Does not include derivatives, except purchased options, if any.  
[16]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[17]
* Does not include derivatives, except purchased options, if any.  
[18]
* Does not include derivatives, except purchased options, if any.