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Putnam International Capital Opportunities

Prospectus Supplement   May 18, 2018  

Putnam International Capital Opportunities Fund
Prospectus dated December 30, 2017

Beginning on May 21, 2018, the fund will offer class R6 shares to:

• employer-sponsored retirement plans that are clients of third-party administrators (including affiliates of Putnam) that have entered into agreements with Putnam;

• investors purchasing shares through an asset-based fee program that is sponsored by a registered broker-dealer or other financial institution;

• investors purchasing shares through a commission-based platform of a registered broker-dealer or other financial institution that charges the shareholder additional fees or commissions, other than those described in the prospectus and statement of additional information, and that has entered into an agreement with Putnam Retail Management to offer class R6 shares through such a program;

• corporations, endowments, foundations and other institutional investors that have been approved by Putnam; and

• unaffiliated investment companies (whether registered or private) that have been approved by Putnam.

The prospectus is supplemented as follows to add information about class R6 shares.

The front cover page is supplemented to add class R6 shares to the list of shares to which the prospectus relates, and to indicate that the fund’s symbol for class R6 shares is PICOX.

The following information is added to similar disclosure for the fund under Fund summary — Fees and expenses:

Shareholder fees (fees paid directly from your investment)

Share class	Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)
Class R6	NONE	NONE

Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)

Share class	Management fees†	Distribution and service (12b-1) fees	Other expenses	Total annual fund operating expenses
Class R6	0.69%	N/A	0.16%=	0.85%

† 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 Developed Ex-U.S. SmallCap Index. For the most recent fiscal year, the fund’s base management fee prior to any performance adjustment was 0.925%.

= Other expenses are based on expenses of class A shares for the fund’s last fiscal year, restated to reflect the lower investor servicing fees applicable to class R6 shares.

Example

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. Your actual costs may be higher or lower.

Share class	1 year	3 years	5 years	10 years
Class R6	$87	$271	$471	$1,049

Shareholder fees (fees paid directly from your investment)

Shareholder Fees	Putnam International Capital Opportunities Class R6
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	none
Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)	none

Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Putnam International Capital Opportunities Class R6
Management fees	0.69%	[1]
Distribution and service (12b-1) fees
Other expenses	0.11%	[2]
Total annual fund operating expenses	0.85%

Example

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. Your actual costs may be higher or lower.

Expense Example	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
Putnam International Capital Opportunities | Class R6 | USD ($)	87	271	471	1,049

[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 Developed Ex-U.S. SmallCap Index. For the most recent fiscal year, the fund's base management fee prior to any performance adjustment was 0.925%.

[2] Other expenses are based on expenses of class A shares for the fund's last fiscal year, restated to reflect the lower investor servicing fees applicable to class R6 shares.

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Putnam International Growth Fund

Prospectus Supplement   May 18, 2018  

Putnam International Growth Fund
Prospectus dated January 30, 2018

Beginning on May 21, 2018, the fund will offer class R6 shares to:

• employer-sponsored retirement plans that are clients of third-party administrators (including affiliates of Putnam) that have entered into agreements with Putnam;

• investors purchasing shares through an asset-based fee program that is sponsored by a registered broker-dealer or other financial institution;

• investors purchasing shares through a commission-based platform of a registered broker-dealer or other financial institution that charges the shareholder additional fees or commissions, other than those described in the prospectus and statement of additional information, and that has entered into an agreement with Putnam Retail Management to offer class R6 shares through such a program;

• corporations, endowments, foundations and other institutional investors that have been approved by Putnam; and

• unaffiliated investment companies (whether registered or private) that have been approved by Putnam.

The prospectus is supplemented as follows to add information about class R6 shares.

The front cover page is supplemented to add class R6 shares to the list of shares to which the prospectus relates, and to indicate that the fund’s symbol for class R6 shares is PIDRX.

The following information is added to similar disclosure for the fund under Fund summary — Fees and expenses:

Shareholder fees (fees paid directly from your investment)

Share class	Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)
Class R6	NONE	NONE

Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)

Share class	Management fees†	Distribution and service (12b-1) fees	Other expenses	Total annual fund operating expenses
Class R6	0.84%	N/A	0.20%=	1.04%

† Management fees are subject to 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 MSCI EAFE Growth Index (ND). For the most recent fiscal year, the fund’s base management fee prior to any performance adjustment was 0.925%.

= Other expenses are based on expenses of class A shares for the fund’s last fiscal year, restated to reflect the lower investor servicing fees applicable to class R6 shares.

Example

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. Your actual costs may be higher or lower.

Share class	1 year	3 years	5 years	10 years
Class R6	$106	$331	$574	$1,271

Shareholder fees (fees paid directly from your investment)

Shareholder Fees	Putnam International Growth Fund Class R6
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	none
Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)	none

Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Putnam International Growth Fund Class R6
Management fees	0.84%	[1]
Distribution and service (12b-1) fees
Other expenses	0.20%	[2]
Total annual fund operating expenses	1.04%

Example

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. Your actual costs may be higher or lower.

Expense Example	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
Putnam International Growth Fund | Class R6 | USD ($)	106	331	574	1,271

[1] Management fees are subject to 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 MSCI EAFE Growth Index (ND). For the most recent fiscal year, the fund's base management fee prior to any performance adjustment was 0.925%.

[2] Other expenses are based on expenses of class A shares for the fund's last fiscal year, restated to reflect the lower investor servicing fees applicable to class R6 shares.

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Putnam Sustainable Future Fund

Prospectus Supplement   May 18, 2018  

Putnam Sustainable Future Fund
Prospectus dated March 21, 2018

Beginning on May 21, 2018, the fund will offer class R6 shares to:

• employer-sponsored retirement plans that are clients of third-party administrators (including affiliates of Putnam) that have entered into agreements with Putnam;

• investors purchasing shares through an asset-based fee program that is sponsored by a registered broker-dealer or other financial institution;

• investors purchasing shares through a commission-based platform of a registered broker-dealer or other financial institution that charges the shareholder additional fees or commissions, other than those described in the prospectus and statement of additional information, and that has entered into an agreement with Putnam Retail Management to offer class R6 shares through such a program;

• corporations, endowments, foundations and other institutional investors that have been approved by Putnam; and

• unaffiliated investment companies (whether registered or private) that have been approved by Putnam.

The prospectus is supplemented as follows to add information about class R6 shares.

The front cover page is supplemented to add class R6 shares to the list of shares to which the prospectus relates, and to indicate that the fund’s symbol for class R6 shares is PNOTX.

The following information is added to similar disclosure for the fund under Fund summary — Fees and expenses:

Shareholder fees (fees paid directly from your investment)

Share class	Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)
Class R6	NONE	NONE

Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)

Share class	Management fees	Distribution and service (12b-1) fees	Other expenses	Total annual fund operating expenses
Class R6	0.56%	N/A	0.11%=	0.67%

= Other expenses are based on expenses of class A shares for the fund’s last fiscal year, restated to reflect the lower investor servicing fees applicable to class R6 shares.

Example

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. Your actual costs may be higher or lower.

Share class	1 year	3 years	5 years	10 years
Class R6	$68	$214	$373	$835

Shareholder fees (fees paid directly from your investment)

Shareholder Fees	Putnam Sustainable Future Fund Class R6
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	none
Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)	none

Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Putnam Sustainable Future Fund Class R6
Management fees	0.56%
Distribution and service (12b-1) fees
Other expenses	0.11%	[1]
Total annual fund operating expenses	0.67%

Example

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. Your actual costs may be higher or lower.

Expense Example	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
Putnam Sustainable Future Fund | Class R6 | USD ($)	68	214	373	835

[1] Other expenses are based on expenses of class A shares for the fund's last fiscal year, restated to reflect the lower investor servicing fees applicable to class R6 shares.

XML

Label

Element

Value

Risk Return Abstract

rr_RiskReturnAbstract

Document Type

dei_DocumentType

497

Document Period End Date

dei_DocumentPeriodEndDate

May 18, 2018

Registrant Name

dei_EntityRegistrantName

PUTNAM INVESTMENT FUNDS

Central Index Key

dei_EntityCentralIndexKey

0000932101

Amendment Flag

dei_AmendmentFlag

false

Trading Symbol

dei_TradingSymbol

PIF

Document Creation Date

dei_DocumentCreationDate

May 16, 2018

Document Effective Date

dei_DocumentEffectiveDate

May 18, 2018

Prospectus Date

rr_ProspectusDate

Dec. 30, 2017

Supplement Text

PIF_SupplementText

Prospectus Supplement   May 18, 2018  

Putnam International Capital Opportunities Fund
Prospectus dated December 30, 2017

Beginning on May 21, 2018, the fund will offer class R6 shares to:

• employer-sponsored retirement plans that are clients of third-party administrators (including affiliates of Putnam) that have entered into agreements with Putnam;

• investors purchasing shares through an asset-based fee program that is sponsored by a registered broker-dealer or other financial institution;

• investors purchasing shares through a commission-based platform of a registered broker-dealer or other financial institution that charges the shareholder additional fees or commissions, other than those described in the prospectus and statement of additional information, and that has entered into an agreement with Putnam Retail Management to offer class R6 shares through such a program;

• corporations, endowments, foundations and other institutional investors that have been approved by Putnam; and

• unaffiliated investment companies (whether registered or private) that have been approved by Putnam.

The prospectus is supplemented as follows to add information about class R6 shares.

The front cover page is supplemented to add class R6 shares to the list of shares to which the prospectus relates, and to indicate that the fund’s symbol for class R6 shares is PICOX.

The following information is added to similar disclosure for the fund under Fund summary — Fees and expenses:

Shareholder fees (fees paid directly from your investment)

Share class	Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)
Class R6	NONE	NONE

Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)

Share class	Management fees†	Distribution and service (12b-1) fees	Other expenses	Total annual fund operating expenses
Class R6	0.69%	N/A	0.16%=	0.85%

† 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 Developed Ex-U.S. SmallCap Index. For the most recent fiscal year, the fund’s base management fee prior to any performance adjustment was 0.925%.

= Other expenses are based on expenses of class A shares for the fund’s last fiscal year, restated to reflect the lower investor servicing fees applicable to class R6 shares.

Example

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. Your actual costs may be higher or lower.

Share class	1 year	3 years	5 years	10 years
Class R6	$87	$271	$471	$1,049

Prospectus Supplement   May 18, 2018  

Putnam International Growth Fund
Prospectus dated January 30, 2018

Beginning on May 21, 2018, the fund will offer class R6 shares to:

• employer-sponsored retirement plans that are clients of third-party administrators (including affiliates of Putnam) that have entered into agreements with Putnam;

• investors purchasing shares through an asset-based fee program that is sponsored by a registered broker-dealer or other financial institution;

• investors purchasing shares through a commission-based platform of a registered broker-dealer or other financial institution that charges the shareholder additional fees or commissions, other than those described in the prospectus and statement of additional information, and that has entered into an agreement with Putnam Retail Management to offer class R6 shares through such a program;

• corporations, endowments, foundations and other institutional investors that have been approved by Putnam; and

• unaffiliated investment companies (whether registered or private) that have been approved by Putnam.

The prospectus is supplemented as follows to add information about class R6 shares.

The front cover page is supplemented to add class R6 shares to the list of shares to which the prospectus relates, and to indicate that the fund’s symbol for class R6 shares is PIDRX.

The following information is added to similar disclosure for the fund under Fund summary — Fees and expenses:

Shareholder fees (fees paid directly from your investment)

Share class	Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)
Class R6	NONE	NONE

Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)

Share class	Management fees†	Distribution and service (12b-1) fees	Other expenses	Total annual fund operating expenses
Class R6	0.84%	N/A	0.20%=	1.04%

† Management fees are subject to 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 MSCI EAFE Growth Index (ND). For the most recent fiscal year, the fund’s base management fee prior to any performance adjustment was 0.925%.

= Other expenses are based on expenses of class A shares for the fund’s last fiscal year, restated to reflect the lower investor servicing fees applicable to class R6 shares.

Example

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. Your actual costs may be higher or lower.

Share class	1 year	3 years	5 years	10 years
Class R6	$106	$331	$574	$1,271

Prospectus Supplement   May 18, 2018  

Putnam Sustainable Future Fund
Prospectus dated March 21, 2018

Beginning on May 21, 2018, the fund will offer class R6 shares to:

• employer-sponsored retirement plans that are clients of third-party administrators (including affiliates of Putnam) that have entered into agreements with Putnam;

• investors purchasing shares through an asset-based fee program that is sponsored by a registered broker-dealer or other financial institution;

• investors purchasing shares through a commission-based platform of a registered broker-dealer or other financial institution that charges the shareholder additional fees or commissions, other than those described in the prospectus and statement of additional information, and that has entered into an agreement with Putnam Retail Management to offer class R6 shares through such a program;

• corporations, endowments, foundations and other institutional investors that have been approved by Putnam; and

• unaffiliated investment companies (whether registered or private) that have been approved by Putnam.

The prospectus is supplemented as follows to add information about class R6 shares.

The front cover page is supplemented to add class R6 shares to the list of shares to which the prospectus relates, and to indicate that the fund’s symbol for class R6 shares is PNOTX.

The following information is added to similar disclosure for the fund under Fund summary — Fees and expenses:

Shareholder fees (fees paid directly from your investment)

Share class	Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)
Class R6	NONE	NONE

Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)

Share class	Management fees	Distribution and service (12b-1) fees	Other expenses	Total annual fund operating expenses
Class R6	0.56%	N/A	0.11%=	0.67%

= Other expenses are based on expenses of class A shares for the fund’s last fiscal year, restated to reflect the lower investor servicing fees applicable to class R6 shares.

Example

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. Your actual costs may be higher or lower.

Share class	1 year	3 years	5 years	10 years
Class R6	$68	$214	$373	$835

Putnam International Capital Opportunities

Risk Return Abstract

rr_RiskReturnAbstract

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

Other expenses are based on expenses of class A shares for the fund's last fiscal year, restated to reflect the lower investor servicing fees applicable to class R6 shares.

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. Your actual costs may be higher or lower.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

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 Developed Ex-U.S. SmallCap Index. For the most recent fiscal year, the fund’s base management fee prior to any performance adjustment was 0.925%.

Putnam International Capital Opportunities | Class R6

Risk Return Abstract

rr_RiskReturnAbstract

Maximum sales charge (load) imposed on purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)

rr_MaximumDeferredSalesChargeOverOther

none

Management fees

rr_ManagementFeesOverAssets

0.69%

^[1]

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

Other expenses

rr_OtherExpensesOverAssets

0.11%

^[2]

Total annual fund operating expenses

rr_ExpensesOverAssets

0.85%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 87

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

271

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

471

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,049

Putnam International Growth Fund

Risk Return Abstract

rr_RiskReturnAbstract

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

Other expenses are based on expenses of class A shares for the fund's last fiscal year, restated to reflect the lower investor servicing fees applicable to class R6 shares.

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. Your actual costs may be higher or lower.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

Management fees are subject to 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 MSCI EAFE Growth Index (ND). For the most recent fiscal year, the fund’s base management fee prior to any performance adjustment was 0.925%.

Putnam International Growth Fund | Class R6

Risk Return Abstract

rr_RiskReturnAbstract

Maximum sales charge (load) imposed on purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)

rr_MaximumDeferredSalesChargeOverOther

none

Management fees

rr_ManagementFeesOverAssets

0.84%

^[3]

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

Other expenses

rr_OtherExpensesOverAssets

0.20%

^[2]

Total annual fund operating expenses

rr_ExpensesOverAssets

1.04%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 106

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

331

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

574

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,271

Putnam Sustainable Future Fund

Risk Return Abstract

rr_RiskReturnAbstract

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

Other expenses are based on expenses of class A shares for the fund's last fiscal year, restated to reflect the lower investor servicing fees applicable to class R6 shares.

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. Your actual costs may be higher or lower.

Putnam Sustainable Future Fund | Class R6

Risk Return Abstract

rr_RiskReturnAbstract

Maximum sales charge (load) imposed on purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)

rr_MaximumDeferredSalesChargeOverOther

none

Management fees

rr_ManagementFeesOverAssets

0.56%

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

Other expenses

rr_OtherExpensesOverAssets

0.11%

^[2]

Total annual fund operating expenses

rr_ExpensesOverAssets

0.67%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 68

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

214

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

373

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 835

[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 Developed Ex-U.S. SmallCap Index. For the most recent fiscal year, the fund's base management fee prior to any performance adjustment was 0.925%.

[2] Other expenses are based on expenses of class A shares for the fund's last fiscal year, restated to reflect the lower investor servicing fees applicable to class R6 shares.

[3] Management fees are subject to 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 MSCI EAFE Growth Index (ND). For the most recent fiscal year, the fund's base management fee prior to any performance adjustment was 0.925%.