v3.25.1
Label Element Value
Prospectus [Line Items] rr_ProspectusLineItems  
Document Type dei_DocumentType 497
Document Period End Date dei_DocumentPeriodEndDate Dec. 31, 2024
Entity Registrant Name dei_EntityRegistrantName Putnam Investment Funds
Entity Central Index Key dei_EntityCentralIndexKey 0000932101
Entity Inv Company Type dei_EntityInvCompanyType N-1A
Amendment Flag dei_AmendmentFlag false
Putnam International Capital Opportunities Fund  
Prospectus [Line Items] rr_ProspectusLineItems  
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses (expenses you pay each year as a percentage of the value of your investment)
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. It assumes that you invest $10,000 in the fund for the time periods indicated and then, except as indicated, redeem all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Only the first year of each period in the example takes into account the fee waiver/expense reimbursement arrangements described above. Your actual costs may be higher or lower.

Putnam International Capital Opportunities Fund | Class A  
Prospectus [Line Items] rr_ProspectusLineItems  
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 1.02% [1]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.32%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.59%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.08%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.51% [3]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 720
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 1,041
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,384
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,349
Putnam International Capital Opportunities Fund | Class C  
Prospectus [Line Items] rr_ProspectusLineItems  
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 1.02% [1]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.32%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 2.34%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.08%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 2.26% [3]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 329
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 723
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,244
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,484
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 229
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 723
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,244
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,484
Putnam International Capital Opportunities Fund | Class R  
Prospectus [Line Items] rr_ProspectusLineItems  
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 1.02% [1]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.50%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.32%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.84%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.08%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.76% [3]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 179
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 571
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 988
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,152
Putnam International Capital Opportunities Fund | Class R6  
Prospectus [Line Items] rr_ProspectusLineItems  
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 1.02% [1]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.16%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.18%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.13%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.05% [3]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 107
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 362
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 637
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,422
Putnam International Capital Opportunities Fund | Class Y  
Prospectus [Line Items] rr_ProspectusLineItems  
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 1.02% [1]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.32%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.34%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.29%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.05% [3]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 107
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 396
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 706
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,587
[1] Management fees reflect a performance adjustment. The fund's base management fee is subject to adjustment, up or down, based on the fund's performance relative to the performance of the S&P’s base management fee prior to any performance adjustment was 0.91%.
[2] Effective June 2, 2025, the fund's investment manager has agreed to waive fees and/or reimburse operating expenses (excluding 12b-1 fees, interest expense, payments under the fund's investor servicing contract, brokerage commissions, taxes, acquired fund fees and expenses, investment-related expenses (such as short selling and lines of credit costs) and extraordinary expenses, such as those relating to litigation, indemnification, reorganizations and liquidations) for the fund so that the ratio of total annual fund operating expenses will not exceed 1.05% for each share class. In addition, fund's investor servicing agent has agreed to waive all investor servicing fees with respect to Class R6 and Y shares of the fund. These contractual fee waiver and expense reimbursement arrangements run until December 30, 2026. During their terms, the fee waiver and expense reimbursement arrangements may not be terminated or amended without approval of the board of trustees.
[3] Total annual fund operating expenses after expense reimbursement have been restated to reflect current waiver arrangements and operating expense caps.