485BPOS

As filed with the Securities and Exchange Commission on
October 16, 2019
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
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FORM N-1A
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REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933	/ X /
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Pre-Effective Amendment No.	/    /
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Post-Effective Amendment No. 42	/ X /
and	----
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REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY	/ X /
ACT OF 1940	----
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Amendment No. 43	/ X /
(Check appropriate box or boxes)	----
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PUTNAM NEW JERSEY TAX EXEMPT INCOME FUND
(Registration No. 33-32550; 811-05977)
(Exact name of registrants as specified in charter)
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REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933	/ X /
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Pre-Effective Amendment No.	/    /
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Post-Effective Amendment No. 51	/ X /
and	----
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REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY	/ X /
ACT OF 1940	----
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Amendment No. 52	/ X /
(Check appropriate box or boxes)	----
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PUTNAM MASSACHUSETTS TAX EXEMPT INCOME FUND
Registration No. 33-5416; 811-04518
PUTNAM MINNESOTA TAX EXEMPT INCOME FUND
Registration No. 33-8916; 811-04527
PUTNAM OHIO TAX EXEMPT INCOME FUND
Registration No. 33-8924; 811-04528
(Exact name of registrants as specified in charter)
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REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933	/ X /
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Pre-Effective Amendment No.	/    /
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Post-Effective Amendment No. 44	/ X /
and	----
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REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY	/ X /
ACT OF 1940	----
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Amendment No. 45	/ X /
(Check appropriate box or boxes)	----
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PUTNAM PENNSYLVANIA TAX EXEMPT INCOME FUND
(Registration No. 33-28321; 811-05802)
(Exact name of registrant as specified in charter)
100 Federal Street, Boston, Massachusetts 02110
(Address of principal executive offices)
Registrants' Telephone Number, including Area Code (617) 292-1000
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	It is proposed that this filing will become effective
	(check appropriate box)
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/    /	immediately upon filing pursuant to paragraph (b)
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/ X /	on September 30, 2019 pursuant to paragraph (b)
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/    /	60 days after filing pursuant to paragraph (a)(1)
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/    /	on (date) pursuant to paragraph (a)(1)
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/    /	75 days after filing pursuant to paragraph (a)(2)
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/    /	on (date) pursuant to paragraph (a)(2) of Rule 485.
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If appropriate, check the following box:
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/    /	this post-effective amendment designates a new
----	effective date for a previously filed post-effective amendment.
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	ROBERT T. BURNS, Vice President
	PUTNAM MASSACHUSETTS TAX EXEMPT INCOME FUND
	PUTNAM MINNESOTA TAX EXEMPT INCOME FUND
	PUTNAM NEW JERSEY TAX EXEMPT INCOME FUND
	PUTNAM OHIO TAX EXEMPT INCOME FUND
	PUTNAM PENNSYLVANIA TAX EXEMPT INCOME FUND
	100 Federal Street
	Boston, Massachusetts 02110
	(Name and address of agent for service)
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	Copy to:
	BRYAN CHEGWIDDEN, Esquire
	ROPES & GRAY LLP
	1211 Avenue of the Americas
	New York, New York 10036
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Putnam Massachusetts Tax Exempt Income Fund

Putnam Minnesota Tax Exempt Income Fund

Putnam New Jersey Tax Exempt Income Fund

Putnam Ohio Tax Exempt Income Fund

Putnam Pennsylvania Tax Exempt Income Fund

(collectively the "Funds")

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, and the Investment Company Act of 1940, as amended, each of the Registrants certifies that it meets all of the requirements for effectiveness of this Registration Statement under Rule 485(b) under the Securities Act of 1933, as amended, and has duly caused this Amendment to its Registration Statement to be signed on its behalf by the undersigned, duly authorized, in the City of Boston, and The Commonwealth of Massachusetts, on the 16th day of October, 2019.

PUTNAM MASSACHUSETTS TAX EXEMPT INCOME FUND

PUTNAM MINNESOTA TAX EXEMPT INCOME FUND

PUTNAM NEW JERSEY TAX EXEMPT INCOME FUND

PUTNAM OHIO TAX EXEMPT INCOME FUND

PUTNAM PENNSYLVANIA TAX EXEMPT INCOME FUND

By: /s/ Jonathan S. Horwitz, Executive Vice President, Principal Executive Officer and Compliance Liaison

Pursuant to the requirements of the Securities Act of 1933, as amended, this Amendment to the Registration Statements of Putnam Massachusetts Tax Exempt Income Fund, Putnam Minnesota Tax Exempt Income Fund, Putnam New Jersey Tax Exempt Income Fund, Putnam Ohio Tax Exempt Income Fund and Putnam Pennsylvania Tax Exempt Income Fund has been signed below by the following persons in the capacities and on the date indicated:

Signature Title

Kenneth R. Leibler* Chair, Board of Trustees

Robert L. Reynolds* President and Trustee

Jonathan S. Horwitz* Executive Vice President, Principal Executive Officer and Compliance Liaison

Janet C. Smith* Vice President, Principal Financial Officer, Principal Accounting Officer and Assistant Treasurer

Liaquat Ahamed* Trustee

Ravi Akhoury* Trustee

Barbara M. Baumann* Trustee

Katinka Domotorffy* Trustee

Catharine Bond Hill* Trustee

Paul L. Joskow* Trustee

Robert E. Patterson* Trustee

George Putnam, III* Trustee

Manoj P. Singh* Trustee

By: /s/ Jonathan S. Horwitz, as Attorney-in-Fact

October 16, 2019

*Signed pursuant to power of attorney filed in Post-Effective Amendment No. 38 to the New Jersey fund’s Registration Statement on May 18, 2018.

*Signed pursuant to power of attorney filed in Post-Effective Amendment No. 47 to the Massachusetts, Minnesota and Ohio funds’ Registration Statement on May 18, 2018.

*Signed pursuant to power of attorney filed in Post-Effective Amendment No. 40 to the Pennsylvania fund’s Registration Statement on May 18, 2018.

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Putnam Ohio Tax Exempt Income Fund

Fund Summary

Goal

Putnam Ohio Tax Exempt Income Fund seeks as high a level of current income exempt from federal income tax and Ohio personal income tax as we believe is consistent with preservation of capital.

Fees and expenses

The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in class A shares or $50,000 in class M shares of Putnam funds. More information about these and other discounts is available from your financial advisor and in How do I buy fund shares? beginning on page 31 of the fund’s prospectus, in the Appendix to the fund’s prospectus, and in How to buy shares beginning on page II-1 of the fund’s statement of additional information (SAI).

Shareholder fees (fees paid directly from your investment)

Shareholder Fees - Putnam Ohio Tax Exempt Income Fund	Class A		Class B		Class C		Class M	Class R6	Class Y
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	4.00%		none		none		3.25%	none	none
Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)	1.00%	[1]	5.00%	[2]	1.00%	[3]	none	none	none

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

Annual Fund Operating Expenses - Putnam Ohio Tax Exempt Income Fund	Class A		Class B	Class C	Class M	Class R6	Class Y
Management fees	0.43%		0.43%	0.43%	0.43%	0.43%	0.43%
Distribution and service (12b-1) fees	0.22%	[1]	0.85%	1.00%	0.50%
Other expenses	0.19%		0.19%	0.19%	0.19%	0.16%	0.19%
Total annual fund operating expenses	0.84%		1.47%	1.62%	1.12%	0.59%	0.62%

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 - Putnam Ohio Tax Exempt Income Fund - USD ($)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
Class A	482	657	847	1,396
Class B	650	765	1,003	1,587
Class C	265	511	881	1,922
Class M	435	669	922	1,644
Class R6	60	189	329	738
Class Y	63	199	346	774

Expense Example, No Redemption - Putnam Ohio Tax Exempt Income Fund - USD ($)	Expense Example, No Redemption, 1 Year	Expense Example, No Redemption, 3 Years	Expense Example, No Redemption, 5 Years	Expense Example, No Redemption, 10 Years
Class B	150	465	803	1,587
Class C	165	511	881	1,922

Portfolio turnover

The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs and may result in higher taxes when the fund’s shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 19%.

Investments, risks, and performance

Investments
We invest mainly in bonds that pay interest that is exempt from federal income tax and Ohio personal income tax (but that may be subject to federal alternative minimum tax (AMT)), are investment-grade in quality, and have intermediate- to long-term maturities (i.e., three years or longer). Under normal circumstances, we invest at least 80% of the fund’s net assets in tax-exempt investments. Tax-exempt investments are issued by or for states, territories or possessions of the United States or by their political subdivisions, agencies, authorities or other government entities, and the income from these investments is exempt from both federal and Ohio personal income tax. This investment policy cannot be changed without the approval of the fund’s shareholders. We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell investments.

Risks

It is important to understand that you can lose money by investing in the fund.

The value of investments in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical events or changes, and factors related to a specific issuer, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity in the fund’s portfolio holdings.

The risks associated with bond investments include interest rate risk, which means the value of the fund’s investments is likely to fall if interest rates rise. Bond investments also are subject to credit risk, which is the risk that the issuers of the fund’s investments may default on payment of interest or principal. Since the fund invests in tax-exempt bonds, which, to be treated as tax-exempt under the Internal Revenue Code, may be issued only by limited types of issuers for limited types of projects, the fund’s investments may be focused in certain market segments. Consequently, the fund may be more vulnerable to fluctuations in the values of the securities it holds than a fund that invests more broadly. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds, which can be more sensitive to changes in markets, credit conditions, and interest rates. The fund’s performance will be closely tied to the economic and political conditions in Ohio, and can be more volatile than the performance of a more geographically diversified fund. To the extent investments in securities of issuers located outside of Ohio are made, the fund may also be exposed to the risks affecting other states. Interest the fund receives might be taxable.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Performance

The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The bar chart does not reflect the impact of sales charges. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results. Monthly performance figures for the fund are available at putnam.com.

Annual total returns for class A shares before sales charges

Year-to-date performance
through 6/30/19  4.43%

Best calendar quarter
Q3 2009   7.12%

Worst calendar quarter
Q4 2010 −4.37%

Average annual total returns after sales charges (for periods ended 12/31/18)

Average Annual Total Returns - Putnam Ohio Tax Exempt Income Fund		1 Year	5 Years	10 Years
Class A		(3.44%)	2.28%	3.69%
Class A | after taxes on distributions		(3.45%)	2.28%	3.69%
Class A | after taxes on distributions and sale of fund shares		(0.99%)	2.45%	3.66%
Class B		(4.83%)	2.12%	3.60%
Class C		(1.18%)	2.33%	3.31%
Class M		(2.85%)	2.16%	3.50%
Class R6	[1]	0.79%	3.35%	4.36%
Class Y		0.81%	3.35%	4.36%
Bloomberg Barclays Municipal Bond Index (no deduction for fees, expenses or taxes)		1.28%	3.82%	4.85%

After-tax returns reflect the historical highest individual federal marginal income tax rates and do not reflect state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are shown for class A shares only and will vary for other classes. These after-tax returns do not apply if you hold your fund shares through a 401(k) plan, an IRA, or another tax-advantaged arrangement.

Class B share performance reflects conversion to class A shares after eight years.

[1] Applies only to certain redemptions of shares bought with no initial sales charge.

[2] This charge is phased out over six years.

[3] This charge is eliminated after one year.

[1] Represents a blended rate.

[1] Performance for class R6 shares prior to their inception (5/22/18) is derived from the historical performance of class Y shares and has not been adjusted for the lower investor servicing fees applicable to class R6 shares; had it, returns would have been higher.

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Putnam Massachusetts Tax Exempt Income Fund

Fund Summary

Goal

Putnam Massachusetts Tax Exempt Income Fund seeks as high a level of current income exempt from federal income tax and Massachusetts personal income tax as we believe is consistent with preservation of capital.

Fees and expenses

The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in class A shares or $50,000 in class M shares of Putnam funds. More information about these and other discounts is available from your financial advisor and in How do I buy fund shares? beginning on page 31 of the fund’s prospectus, in the Appendix to the fund’s prospectus, and in How to buy shares beginning on page II-1 of the fund’s statement of additional information (SAI).

Shareholder fees (fees paid directly from your investment)

Shareholder Fees - Putnam Massachusetts Tax Exempt Income Fund	Class A		Class B		Class C		Class M	Class R6	Class Y
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	4.00%		none		none		3.25%	none	none
Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)	1.00%	[1]	5.00%	[2]	1.00%	[3]	none	none	none

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

Annual Fund Operating Expenses - Putnam Massachusetts Tax Exempt Income Fund	Class A		Class B	Class C	Class M	Class R6	Class Y
Management fees	0.43%		0.43%	0.43%	0.43%	0.43%	0.43%
Distribution and service (12b-1) fees	0.23%	[1]	0.85%	1.00%	0.50%
Other expenses	0.14%		0.14%	0.14%	0.14%	0.13%	0.14%
Total annual fund operating expenses	0.80%		1.42%	1.57%	1.07%	0.56%	0.57%

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 - Putnam Massachusetts Tax Exempt Income Fund - USD ($)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
Class A	478	645	826	1,350
Class B	645	749	976	1,533
Class C	260	496	855	1,867
Class M	431	654	896	1,588
Class R6	57	179	313	701
Class Y	58	183	318	714

Expense Example, No Redemption - Putnam Massachusetts Tax Exempt Income Fund - USD ($)	Expense Example, No Redemption, 1 Year	Expense Example, No Redemption, 3 Years	Expense Example, No Redemption, 5 Years	Expense Example, No Redemption, 10 Years
Class B	145	449	776	1,533
Class C	160	496	855	1,867

Portfolio turnover

The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs and may result in higher taxes when the fund’s shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 22%.

Investments, risks, and performance

Investments
We invest mainly in bonds that pay interest that is exempt from federal income tax and Massachusetts personal income tax (but that may be subject to federal alternative minimum tax (AMT)), are investment-grade in quality, and have intermediate- to long-term maturities (i.e., three years or longer). Under normal circumstances, we invest at least 80% of the fund’s net assets in tax-exempt investments. Tax-exempt investments are issued by or for states, territories or possessions of the United States or by their political subdivisions, agencies, authorities or other government entities, and the income from these investments is exempt from both federal and Massachusetts personal income tax. This investment policy cannot be changed without the approval of the fund’s shareholders. We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell investments.

Risks

It is important to understand that you can lose money by investing in the fund.

The value of investments in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical events or changes, and factors related to a specific issuer, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity in the fund’s portfolio holdings.

The risks associated with bond investments include interest rate risk, which means the value of the fund’s investments is likely to fall if interest rates rise. Bond investments also are subject to credit risk, which is the risk that the issuers of the fund’s investments may default on payment of interest or principal. Since the fund invests in tax-exempt bonds, which, to be treated as tax-exempt under the Internal Revenue Code, may be issued only by limited types of issuers for limited types of projects, the fund’s investments may be focused in certain market segments. Consequently, the fund may be more vulnerable to fluctuations in the values of the securities it holds than a fund that invests more broadly. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds, which can be more sensitive to changes in markets, credit conditions, and interest rates. The fund’s performance will be closely tied to the economic and political conditions in Massachusetts, and can be more volatile than the performance of a more geographically diversified fund. To the extent investments in securities of issuers located outside of Massachusetts are made, the fund may also be exposed to the risks affecting other states. Interest the fund receives might be taxable.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Performance

The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The bar chart does not reflect the impact of sales charges. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results. Monthly performance figures for the fund are available at putnam.com.

Annual total returns for class A shares before sales charges

Year-to-date performance
through 6/30/19  4.78%

Best calendar quarter
Q3 2009   8.19%

Worst calendar quarter
Q4 2010 −5.07%

Average annual total returns after sales charges (for periods ended 12/31/18)

Average Annual Total Returns - Putnam Massachusetts Tax Exempt Income Fund		1 Year	5 Years	10 Years
Class A		(3.80%)	2.55%	4.32%
Class A | after taxes on distributions		(3.83%)	2.53%	4.28%
Class A | after taxes on distributions and sale of fund shares		(1.15%)	2.66%	4.18%
Class B		(5.28%)	2.39%	4.20%
Class C		(1.53%)	2.59%	3.94%
Class M		(3.31%)	2.43%	4.12%
Class R6	[1]	0.45%	3.64%	4.99%
Class Y		0.43%	3.63%	4.98%
Bloomberg Barclays Municipal Bond Index (no deduction for fees, expenses or taxes)		1.28%	3.82%	4.85%

After-tax returns reflect the historical highest individual federal marginal income tax rates and do not reflect state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are shown for class A shares only and will vary for other classes. These after-tax returns do not apply if you hold your fund shares through a 401(k) plan, an IRA, or another tax-advantaged arrangement.

Class B share performance reflects conversion to class A shares after eight years.

[1] Applies only to certain redemptions of shares bought with no initial sales charge.

[2] This charge is phased out over six years.

[3] This charge is eliminated after one year.

[1] Represents a blended rate.

[1] Performance for class R6 shares prior to their inception (5/22/18) is derived from the historical performance of class Y shares and has not been adjusted for the lower investor servicing fees applicable to class R6 shares; had it, returns would have been higher.

XML

Putnam Pennsylvania Tax Exempt Income Fund

Fund Summary

Goal

Putnam Pennsylvania Tax Exempt Income Fund seeks as high a level of current income exempt from federal income tax and Pennsylvania personal income tax as we believe is consistent with preservation of capital.

Fees and expenses

The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in class A shares or $50,000 in class M shares of Putnam funds. More information about these and other discounts is available from your financial advisor and in How do I buy fund shares? beginning on page 31 of the fund’s prospectus, in the Appendix to the fund’s prospectus, and in How to buy shares beginning on page II-1 of the fund’s statement of additional information (SAI).

Shareholder fees (fees paid directly from your investment)

Shareholder Fees - Putnam Pennsylvania Tax Exempt Income Fund	Class A		Class B		Class C		Class M	Class R6	Class Y
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	4.00%		none		none		3.25%	none	none
Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)	1.00%	[1]	5.00%	[2]	1.00%	[3]	none	none	none

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

Annual Fund Operating Expenses - Putnam Pennsylvania Tax Exempt Income Fund	Class A		Class B	Class C	Class M	Class R6	Class Y
Management fees	0.43%		0.43%	0.43%	0.43%	0.43%	0.43%
Distribution and service (12b-1) fees	0.23%	[1]	0.85%	1.00%	0.50%
Other expenses	0.17%		0.17%	0.17%	0.17%	0.14%	0.17%
Total annual fund operating expenses	0.83%		1.45%	1.60%	1.10%	0.57%	0.60%

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 - Putnam Pennsylvania Tax Exempt Income Fund - USD ($)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
Class A	481	654	842	1,384
Class B	648	759	992	1,567
Class C	263	505	871	1,900
Class M	434	663	911	1,622
Class R6	58	183	318	714
Class Y	61	192	335	750

Expense Example, No Redemption - Putnam Pennsylvania Tax Exempt Income Fund - USD ($)	Expense Example, No Redemption, 1 Year	Expense Example, No Redemption, 3 Years	Expense Example, No Redemption, 5 Years	Expense Example, No Redemption, 10 Years
Class B	148	459	792	1,567
Class C	163	505	871	1,900

Portfolio turnover

The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs and may result in higher taxes when the fund’s shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 12%.

Investments, risks, and performance

Investments
We invest mainly in bonds that pay interest that is exempt from federal income tax and Pennsylvania personal income tax (but that may be subject to federal alternative minimum tax (AMT)), are investment-grade in quality, and have intermediate- to long-term maturities (i.e., three years or longer). Under normal circumstances, we invest at least 80% of the fund’s net assets in tax-exempt investments. Tax-exempt investments are issued by or for states, territories or possessions of the United States or by their political subdivisions, agencies, authorities or other government entities, and the income from these investments is exempt from both federal and Pennsylvania personal income tax. This investment policy cannot be changed without the approval of the fund’s shareholders. We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell investments.

Risks

It is important to understand that you can lose money by investing in the fund.

The value of investments in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical events or changes, and factors related to a specific issuer, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity in the fund’s portfolio holdings.

The risks associated with bond investments include interest rate risk, which means the value of the fund’s investments is likely to fall if interest rates rise. Bond investments also are subject to credit risk, which is the risk that the issuers of the fund’s investments may default on payment of interest or principal. Since the fund invests in tax-exempt bonds, which, to be treated as tax-exempt under the Internal Revenue Code, may be issued only by limited types of issuers for limited types of projects, the fund’s investments may be focused in certain market segments. Consequently, the fund may be more vulnerable to fluctuations in the values of the securities it holds than a fund that invests more broadly. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds, which can be more sensitive to changes in markets, credit conditions, and interest rates. The fund’s performance will be closely tied to the economic and political conditions in Pennsylvania, and can be more volatile than the performance of a more geographically diversified fund. To the extent investments in securities of issuers located outside of Pennsylvania are made, the fund may also be exposed to the risks affecting other states. Interest the fund receives might be taxable.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Performance

The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The bar chart does not reflect the impact of sales charges. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results. Monthly performance figures for the fund are available at putnam.com.

Annual total returns for class A shares before sales charges

Year-to-date performance
through 6/30/19  4.90%

Best calendar quarter
Q3 2009   6.87%

Worst calendar quarter
Q4 2010 −4.41%

Average annual total returns after sales charges (for periods ended 12/31/18)

Average Annual Total Returns - Putnam Pennsylvania Tax Exempt Income Fund		1 Year	5 Years	10 Years
Class A		(3.48%)	2.64%	4.08%
Class A | after taxes on distributions		(3.52%)	2.62%	4.07%
Class A | after taxes on distributions and sale of fund shares		(0.94%)	2.75%	4.00%
Class B		(4.98%)	2.48%	3.98%
Class C		(1.21%)	2.69%	3.71%
Class M		(3.10%)	2.52%	3.88%
Class R6	[1]	0.78%	3.72%	4.75%
Class Y		0.77%	3.71%	4.75%
Bloomberg Barclays Municipal Bond Index (no deduction for fees, expenses or taxes)		1.28%	3.82%	4.85%

After-tax returns reflect the historical highest individual federal marginal income tax rates and do not reflect state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are shown for class A shares only and will vary for other classes. These after-tax returns do not apply if you hold your fund shares through a 401(k) plan, an IRA, or another tax-advantaged arrangement.

Class B share performance reflects conversion to class A shares after eight years.

[1] Applies only to certain redemptions of shares bought with no initial sales charge.

[2] This charge is phased out over six years.

[3] This charge is eliminated after one year.

[1] Represents a blended rate.

[1] Performance for class R6 shares prior to their inception (5/22/18) is derived from the historical performance of class Y shares and has not been adjusted for the lower investor servicing fees applicable to class R6 shares; had it, returns would have been higher.

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Putnam New Jersey Tax Exempt Income Fund

Fund Summary

Goal

Putnam New Jersey Tax Exempt Income Fund seeks as high a level of current income exempt from federal income tax and New Jersey personal income tax as we believe is consistent with preservation of capital.

Fees and expenses

The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in class A shares or $50,000 in class M shares of Putnam funds. More information about these and other discounts is available from your financial advisor and in How do I buy fund shares? beginning on page 31 of the fund’s prospectus, in the Appendix to the fund’s prospectus, and in How to buy shares beginning on page II-1 of the fund’s statement of additional information (SAI).

Shareholder fees (fees paid directly from your investment)

Shareholder Fees - Putnam New Jersey Tax Exempt Income Fund	Class A		Class B		Class C		Class M	Class R6	Class Y
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	4.00%		none		none		3.25%	none	none
Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)	1.00%	[1]	5.00%	[2]	1.00%	[3]	none	none	none

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

Annual Fund Operating Expenses - Putnam New Jersey Tax Exempt Income Fund	Class A		Class B	Class C	Class M	Class R6	Class Y
Management fees	0.43%		0.43%	0.43%	0.43%	0.43%	0.43%
Distribution and service (12b-1) fees	0.22%	[1]	0.85%	1.00%	0.50%
Other expenses	0.15%		0.15%	0.15%	0.15%	0.14%	0.15%
Total annual fund operating expenses	0.80%		1.43%	1.58%	1.08%	0.57%	0.58%

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 - Putnam New Jersey Tax Exempt Income Fund - USD ($)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
Class A	479	646	828	1,353
Class B	646	752	982	1,542
Class C	261	499	860	1,878
Class M	432	657	901	1,599
Class R6	58	183	318	714
Class Y	59	186	324	726

Expense Example, No Redemption - Putnam New Jersey Tax Exempt Income Fund - USD ($)	Expense Example, No Redemption, 1 Year	Expense Example, No Redemption, 3 Years	Expense Example, No Redemption, 5 Years	Expense Example, No Redemption, 10 Years
Class B	146	452	782	1,542
Class C	161	499	860	1,878

Portfolio turnover

The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs and may result in higher taxes when the fund’s shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 11%.

Investments, risks, and performance

Investments
We invest mainly in bonds that pay interest that is exempt from federal income tax and New Jersey personal income tax (but that may be subject to federal alternative minimum tax (AMT)), are investment-grade in quality, and have intermediate- to long-term maturities (i.e., three years or longer). Under normal circumstances, we invest at least 80% of the fund’s net assets in tax-exempt investments. Tax-exempt investments are issued by or for states, territories or possessions of the United States or by their political subdivisions, agencies, authorities or other government entities, and the income from these investments is exempt from both federal and New Jersey personal income tax. This investment policy cannot be changed without the approval of the fund’s shareholders. We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell investments.

Risks

It is important to understand that you can lose money by investing in the fund.

The value of investments in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical events or changes, and factors related to a specific issuer, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity in the fund’s portfolio holdings.

The risks associated with bond investments include interest rate risk, which means the value of the fund’s investments is likely to fall if interest rates rise. Bond investments also are subject to credit risk, which is the risk that the issuers of the fund’s investments may default on payment of interest or principal. Since the fund invests in tax-exempt bonds, which, to be treated as tax-exempt under the Internal Revenue Code, may be issued only by limited types of issuers for limited types of projects, the fund’s investments may be focused in certain market segments. Consequently, the fund may be more vulnerable to fluctuations in the values of the securities it holds than a fund that invests more broadly. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds, which can be more sensitive to changes in markets, credit conditions, and interest rates. The fund’s performance will be closely tied to the economic and political conditions in New Jersey, and can be more volatile than the performance of a more geographically diversified fund. To the extent investments in securities of issuers located outside of New Jersey are made, the fund may also be exposed to the risks affecting other states. Interest the fund receives might be taxable.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Performance

The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The bar chart does not reflect the impact of sales charges. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results. Monthly performance figures for the fund are available at putnam.com.

Annual total returns for class A shares before sales charges

Year-to-date performance
through 6/30/19  4.84%

Best calendar quarter
Q3 2009   8.26%

Worst calendar quarter
Q4 2010 −4.47%

Average annual total returns after sales charges (for periods ended 12/31/18)

Average Annual Total Returns - Putnam New Jersey Tax Exempt Income Fund		1 Year	5 Years	10 Years
Class A		(2.97%)	2.64%	4.07%
Class A | after taxes on distributions		(3.02%)	2.60%	4.04%
Class A | after taxes on distributions and sale of fund shares		(0.55%)	2.78%	4.00%
Class B		(4.45%)	2.48%	3.96%
Class C		(0.79%)	2.68%	3.68%
Class M		(2.59%)	2.52%	3.86%
Class R6	[1]	1.32%	3.74%	4.74%
Class Y		1.30%	3.73%	4.73%
Bloomberg Barclays Municipal Bond Index (no deduction for fees, expenses or taxes)		1.28%	3.82%	4.85%

After-tax returns reflect the historical highest individual federal marginal income tax rates and do not reflect state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are shown for class A shares only and will vary for other classes. These after-tax returns do not apply if you hold your fund shares through a 401(k) plan, an IRA, or another tax-advantaged arrangement.

Class B share performance reflects conversion to class A shares after eight years.

[1] Applies only to certain redemptions of shares bought with no initial sales charge.

[2] This charge is phased out over six years.

[3] This charge is eliminated after one year.

[1] Represents a blended rate.

[1] Performance for class R6 shares prior to their inception (5/22/18) is derived from the historical performance of class Y shares and has not been adjusted for the lower investor servicing fees applicable to class R6 shares; had it, returns would have been higher.

XML

Label	Element	Value
Prospectus [Line Items]	rr_ProspectusLineItems
Document Type	dei_DocumentType	485BPOS
Document Period End Date	dei_DocumentPeriodEndDate	Dec. 31, 2018
Entity Registrant Name	dei_EntityRegistrantName	PUTNAM MASSACHUSETTS TAX EXEMPT INCOME FUND/MA/
Entity Central Index Key	dei_EntityCentralIndexKey	0000792288
Amendment Flag	dei_AmendmentFlag	false
Entity Inv Company Type	dei_EntityInvCompanyType	N-1A
Trading Symbol	dei_TradingSymbol	TEIF
Document Creation Date	dei_DocumentCreationDate	Sep. 24, 2019
Document Effective Date	dei_DocumentEffectiveDate	Sep. 30, 2019
Prospectus Date	rr_ProspectusDate	Sep. 30, 2019
Putnam Massachusetts Tax Exempt Income Fund
Prospectus [Line Items]	rr_ProspectusLineItems
Risk/Return [Heading]	rr_RiskReturnHeading	Fund Summary
Objective [Heading]	rr_ObjectiveHeading	Goal
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	Putnam Massachusetts Tax Exempt Income Fund seeks as high a level of current income exempt from federal income tax and Massachusetts personal income tax as we believe is consistent with preservation of capital.
Expense [Heading]	rr_ExpenseHeading	Fees and expenses
Expense Narrative [Text Block]	rr_ExpenseNarrativeTextBlock	The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in class A shares or $50,000 in class M shares of Putnam funds. More information about these and other discounts is available from your financial advisor and in How do I buy fund shares? beginning on page 31 of the fund’s prospectus, in the Appendix to the fund’s prospectus, and in How to buy shares beginning on page II-1 of the fund’s statement of additional information (SAI).
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)
Portfolio Turnover [Heading]	rr_PortfolioTurnoverHeading	Portfolio turnover
Portfolio Turnover [Text Block]	rr_PortfolioTurnoverTextBlock	The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs and may result in higher taxes when the fund’s shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 22%.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	22.00%
Expense Breakpoint Discounts [Text]	rr_ExpenseBreakpointDiscounts	You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in class A shares or $50,000 in class M shares of Putnam funds. More information about these and other discounts is available from your financial advisor and in How do I buy fund shares? beginning on page 31 of the fund's prospectus, in the Appendix to the fund's prospectus, and in How to buy shares beginning on page II-1 of the fund's statement of additional information (SAI).
Expense Breakpoint, Minimum Investment Required [Amount]	rr_ExpenseBreakpointMinimumInvestmentRequiredAmount	$ 50,000
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.
Strategy [Heading]	rr_StrategyHeading	Investments, risks, and performance
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	Investments We invest mainly in bonds that pay interest that is exempt from federal income tax and Massachusetts personal income tax (but that may be subject to federal alternative minimum tax (AMT)), are investment-grade in quality, and have intermediate- to long-term maturities (i.e., three years or longer). Under normal circumstances, we invest at least 80% of the fund’s net assets in tax-exempt investments. Tax-exempt investments are issued by or for states, territories or possessions of the United States or by their political subdivisions, agencies, authorities or other government entities, and the income from these investments is exempt from both federal and Massachusetts personal income tax. This investment policy cannot be changed without the approval of the fund’s shareholders. We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell investments.
Risk [Heading]	rr_RiskHeading	Risks
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	It is important to understand that you can lose money by investing in the fund. The value of investments in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical events or changes, and factors related to a specific issuer, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity in the fund’s portfolio holdings. The risks associated with bond investments include interest rate risk, which means the value of the fund’s investments is likely to fall if interest rates rise. Bond investments also are subject to credit risk, which is the risk that the issuers of the fund’s investments may default on payment of interest or principal. Since the fund invests in tax-exempt bonds, which, to be treated as tax-exempt under the Internal Revenue Code, may be issued only by limited types of issuers for limited types of projects, the fund’s investments may be focused in certain market segments. Consequently, the fund may be more vulnerable to fluctuations in the values of the securities it holds than a fund that invests more broadly. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds, which can be more sensitive to changes in markets, credit conditions, and interest rates. The fund’s performance will be closely tied to the economic and political conditions in Massachusetts, and can be more volatile than the performance of a more geographically diversified fund. To the extent investments in securities of issuers located outside of Massachusetts are made, the fund may also be exposed to the risks affecting other states. Interest the fund receives might be taxable. The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Lose Money [Text]	rr_RiskLoseMoney	It is important to understand that you can lose money by investing in the fund.
Risk Not Insured Depository Institution [Text]	rr_RiskNotInsuredDepositoryInstitution	An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	Performance
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The bar chart does not reflect the impact of sales charges. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results. Monthly performance figures for the fund are available at putnam.com.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	putnam.com
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading]	rr_BarChartHeading	Annual total returns for class A shares before sales charges
Bar Chart Does Not Reflect Sales Loads [Text]	rr_BarChartDoesNotReflectSalesLoads	The bar chart does not reflect the impact of sales charges. If it did, performance would be lower.
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Year-to-date performance through 6/30/19  4.78% Best calendar quarter Q3 2009   8.19% Worst calendar quarter Q4 2010 −5.07%
Year to Date Return, Label	rr_YearToDateReturnLabel	Year-to-date performance
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Jun. 30, 2019
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	4.78%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best calendar quarter
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Sep. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	8.19%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst calendar quarter
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2010
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(5.07%)
Performance Table Heading	rr_PerformanceTableHeading	Average annual total returns after sales charges (for periods ended 12/31/18)
Performance Table Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	After-tax returns reflect the historical highest individual federal marginal income tax rates and do not reflect state and local taxes.
Performance Table Not Relevant to Tax Deferred	rr_PerformanceTableNotRelevantToTaxDeferred	Actual after-tax returns depend on an investor's tax situation and may differ from those shown.
Performance Table One Class of after Tax Shown [Text]	rr_PerformanceTableOneClassOfAfterTaxShown	After-tax returns are shown for class A shares only and will vary for other classes.
Performance Table Closing [Text Block]	rr_PerformanceTableClosingTextBlock	After-tax returns reflect the historical highest individual federal marginal income tax rates and do not reflect state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are shown for class A shares only and will vary for other classes. These after-tax returns do not apply if you hold your fund shares through a 401(k) plan, an IRA, or another tax-advantaged arrangement. Class B share performance reflects conversion to class A shares after eight years.
Putnam Massachusetts Tax Exempt Income Fund | Bloomberg Barclays Municipal Bond Index (no deduction for fees, expenses or taxes)
Prospectus [Line Items]	rr_ProspectusLineItems
1 Year	rr_AverageAnnualReturnYear01	1.28%
5 Years	rr_AverageAnnualReturnYear05	3.82%
10 Years	rr_AverageAnnualReturnYear10	4.85%
Putnam Massachusetts Tax Exempt Income Fund | Class A
Prospectus [Line Items]	rr_ProspectusLineItems
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	4.00%
Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	1.00%	[1]
Management fees	rr_ManagementFeesOverAssets	0.43%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.23%	[2]
Other expenses	rr_OtherExpensesOverAssets	0.14%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.80%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 478
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	645
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	826
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 1,350
Annual Return 2009	rr_AnnualReturn2009	15.91%
Annual Return 2010	rr_AnnualReturn2010	2.40%
Annual Return 2011	rr_AnnualReturn2011	11.11%
Annual Return 2012	rr_AnnualReturn2012	7.42%
Annual Return 2013	rr_AnnualReturn2013	(4.98%)
Annual Return 2014	rr_AnnualReturn2014	9.91%
Annual Return 2015	rr_AnnualReturn2015	2.11%
Annual Return 2016	rr_AnnualReturn2016	0.37%
Annual Return 2017	rr_AnnualReturn2017	4.65%
Annual Return 2018	rr_AnnualReturn2018	0.21%
1 Year	rr_AverageAnnualReturnYear01	(3.80%)
5 Years	rr_AverageAnnualReturnYear05	2.55%
10 Years	rr_AverageAnnualReturnYear10	4.32%
Putnam Massachusetts Tax Exempt Income Fund | Class A | after taxes on distributions
Prospectus [Line Items]	rr_ProspectusLineItems
1 Year	rr_AverageAnnualReturnYear01	(3.83%)
5 Years	rr_AverageAnnualReturnYear05	2.53%
10 Years	rr_AverageAnnualReturnYear10	4.28%
Putnam Massachusetts Tax Exempt Income Fund | Class A | after taxes on distributions and sale of fund shares
Prospectus [Line Items]	rr_ProspectusLineItems
1 Year	rr_AverageAnnualReturnYear01	(1.15%)
5 Years	rr_AverageAnnualReturnYear05	2.66%
10 Years	rr_AverageAnnualReturnYear10	4.18%
Putnam Massachusetts Tax Exempt Income Fund | Class B
Prospectus [Line Items]	rr_ProspectusLineItems
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	5.00%	[3]
Management fees	rr_ManagementFeesOverAssets	0.43%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.85%
Other expenses	rr_OtherExpensesOverAssets	0.14%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.42%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 645
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	749
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	976
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,533
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	145
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	449
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	776
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,533
1 Year	rr_AverageAnnualReturnYear01	(5.28%)
5 Years	rr_AverageAnnualReturnYear05	2.39%
10 Years	rr_AverageAnnualReturnYear10	4.20%
Putnam Massachusetts Tax Exempt Income Fund | Class C
Prospectus [Line Items]	rr_ProspectusLineItems
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	1.00%	[4]
Management fees	rr_ManagementFeesOverAssets	0.43%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other expenses	rr_OtherExpensesOverAssets	0.14%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.57%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 260
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	496
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	855
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,867
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	160
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	496
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	855
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,867
1 Year	rr_AverageAnnualReturnYear01	(1.53%)
5 Years	rr_AverageAnnualReturnYear05	2.59%
10 Years	rr_AverageAnnualReturnYear10	3.94%
Putnam Massachusetts Tax Exempt Income Fund | Class M
Prospectus [Line Items]	rr_ProspectusLineItems
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	3.25%
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	0.43%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.50%
Other expenses	rr_OtherExpensesOverAssets	0.14%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.07%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 431
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	654
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	896
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 1,588
1 Year	rr_AverageAnnualReturnYear01	(3.31%)
5 Years	rr_AverageAnnualReturnYear05	2.43%
10 Years	rr_AverageAnnualReturnYear10	4.12%
Putnam Massachusetts Tax Exempt Income Fund | Class R6
Prospectus [Line Items]	rr_ProspectusLineItems
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	0.43%
Other expenses	rr_OtherExpensesOverAssets	0.13%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.56%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 57
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	179
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	313
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 701
1 Year	rr_AverageAnnualReturnYear01	0.45%	[5]
5 Years	rr_AverageAnnualReturnYear05	3.64%	[5]
10 Years	rr_AverageAnnualReturnYear10	4.99%	[5]
Putnam Massachusetts Tax Exempt Income Fund | Class Y
Prospectus [Line Items]	rr_ProspectusLineItems
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	0.43%
Other expenses	rr_OtherExpensesOverAssets	0.14%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.57%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 58
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	183
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	318
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 714
1 Year	rr_AverageAnnualReturnYear01	0.43%
5 Years	rr_AverageAnnualReturnYear05	3.63%
10 Years	rr_AverageAnnualReturnYear10	4.98%
Putnam Minnesota Tax Exempt Income Fund
Prospectus [Line Items]	rr_ProspectusLineItems
Risk/Return [Heading]	rr_RiskReturnHeading	Fund Summary
Objective [Heading]	rr_ObjectiveHeading	Goal
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	Putnam Minnesota Tax Exempt Income Fund seeks as high a level of current income exempt from federal income tax and Minnesota personal income tax as we believe is consistent with preservation of capital.
Expense [Heading]	rr_ExpenseHeading	Fees and expenses
Expense Narrative [Text Block]	rr_ExpenseNarrativeTextBlock	The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in class A shares or $50,000 in class M shares of Putnam funds. More information about these and other discounts is available from your financial advisor and in How do I buy fund shares? beginning on page 31 of the fund’s prospectus, in the Appendix to the fund’s prospectus, and in How to buy shares beginning on page II-1 of the fund’s statement of additional information (SAI).
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)
Portfolio Turnover [Heading]	rr_PortfolioTurnoverHeading	Portfolio turnover
Portfolio Turnover [Text Block]	rr_PortfolioTurnoverTextBlock	The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs and may result in higher taxes when the fund’s shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 19%.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	19.00%
Expense Breakpoint Discounts [Text]	rr_ExpenseBreakpointDiscounts	You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in class A shares or $50,000 in class M shares of Putnam funds. More information about these and other discounts is available from your financial advisor and in How do I buy fund shares? beginning on page 31 of the fund's prospectus, in the Appendix to the fund's prospectus, and in How to buy shares beginning on page II-1 of the fund's statement of additional information (SAI).
Expense Breakpoint, Minimum Investment Required [Amount]	rr_ExpenseBreakpointMinimumInvestmentRequiredAmount	$ 50,000
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.
Strategy [Heading]	rr_StrategyHeading	Investments, risks, and performance
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	Investments We invest mainly in bonds that pay interest that is exempt from federal income tax and Minnesota personal income tax (but that may be subject to federal alternative minimum tax (AMT)), are investment-grade in quality, and have intermediate- to long-term maturities (i.e., three years or longer). Under normal circumstances, we invest at least 80% of the fund’s net assets in tax-exempt investments. Tax-exempt investments are issued by or for states, territories or possessions of the United States or by their political subdivisions, agencies, authorities or other government entities, and the income from these investments is exempt from both federal and Minnesota personal income tax. This investment policy cannot be changed without the approval of the fund’s shareholders. We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell investments.
Risk [Heading]	rr_RiskHeading	Risks
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	It is important to understand that you can lose money by investing in the fund. The value of investments in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical events or changes, and factors related to a specific issuer, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity in the fund’s portfolio holdings. The risks associated with bond investments include interest rate risk, which means the value of the fund’s investments is likely to fall if interest rates rise. Bond investments also are subject to credit risk, which is the risk that the issuers of the fund’s investments may default on payment of interest or principal. Since the fund invests in tax-exempt bonds, which, to be treated as tax-exempt under the Internal Revenue Code, may be issued only by limited types of issuers for limited types of projects, the fund’s investments may be focused in certain market segments. Consequently, the fund may be more vulnerable to fluctuations in the values of the securities it holds than a fund that invests more broadly. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds, which can be more sensitive to changes in markets, credit conditions, and interest rates. The fund’s performance will be closely tied to the economic and political conditions in Minnesota, and can be more volatile than the performance of a more geographically diversified fund. To the extent investments in securities of issuers located outside of Minnesota are made, the fund may also be exposed to the risks affecting other states. Interest the fund receives might be taxable. The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Lose Money [Text]	rr_RiskLoseMoney	It is important to understand that you can lose money by investing in the fund.
Risk Not Insured Depository Institution [Text]	rr_RiskNotInsuredDepositoryInstitution	An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	Performance
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The bar chart does not reflect the impact of sales charges. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results. Monthly performance figures for the fund are available at putnam.com.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	putnam.com
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading]	rr_BarChartHeading	Annual total returns for class A shares before sales charges
Bar Chart Does Not Reflect Sales Loads [Text]	rr_BarChartDoesNotReflectSalesLoads	The bar chart does not reflect the impact of sales charges. If it did, performance would be lower.
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Year-to-date performance through 6/30/19  4.67% Best calendar quarter Q3 2009   6.51% Worst calendar quarter Q4 2010 −4.22%
Year to Date Return, Label	rr_YearToDateReturnLabel	Year-to-date performance
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Jun. 30, 2019
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	4.67%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best calendar quarter
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Sep. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	6.51%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst calendar quarter
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2010
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(4.22%)
Performance Table Heading	rr_PerformanceTableHeading	Average annual total returns after sales charges (for periods ended 12/31/18)
Performance Table Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	After-tax returns reflect the historical highest individual federal marginal income tax rates and do not reflect state and local taxes.
Performance Table Not Relevant to Tax Deferred	rr_PerformanceTableNotRelevantToTaxDeferred	Actual after-tax returns depend on an investor's tax situation and may differ from those shown.
Performance Table One Class of after Tax Shown [Text]	rr_PerformanceTableOneClassOfAfterTaxShown	After-tax returns are shown for class A shares only and will vary for other classes.
Performance Table Closing [Text Block]	rr_PerformanceTableClosingTextBlock	After-tax returns reflect the historical highest individual federal marginal income tax rates and do not reflect state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are shown for class A shares only and will vary for other classes. These after-tax returns do not apply if you hold your fund shares through a 401(k) plan, an IRA, or another tax-advantaged arrangement. Class B share performance reflects conversion to class A shares after eight years.
Putnam Minnesota Tax Exempt Income Fund | Bloomberg Barclays Municipal Bond Index (no deduction for fees, expenses or taxes)
Prospectus [Line Items]	rr_ProspectusLineItems
1 Year	rr_AverageAnnualReturnYear01	1.28%
5 Years	rr_AverageAnnualReturnYear05	3.82%
10 Years	rr_AverageAnnualReturnYear10	4.85%
Putnam Minnesota Tax Exempt Income Fund | Class A
Prospectus [Line Items]	rr_ProspectusLineItems
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	4.00%
Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	1.00%	[1]
Management fees	rr_ManagementFeesOverAssets	0.43%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.23%	[2]
Other expenses	rr_OtherExpensesOverAssets	0.21%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.87%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 485
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	666
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	862
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 1,427
Annual Return 2009	rr_AnnualReturn2009	15.26%
Annual Return 2010	rr_AnnualReturn2010	2.37%
Annual Return 2011	rr_AnnualReturn2011	10.12%
Annual Return 2012	rr_AnnualReturn2012	6.62%
Annual Return 2013	rr_AnnualReturn2013	(2.79%)
Annual Return 2014	rr_AnnualReturn2014	8.15%
Annual Return 2015	rr_AnnualReturn2015	2.48%
Annual Return 2016	rr_AnnualReturn2016	0.25%
Annual Return 2017	rr_AnnualReturn2017	4.35%
Annual Return 2018	rr_AnnualReturn2018	0.39%
1 Year	rr_AverageAnnualReturnYear01	(3.63%)
5 Years	rr_AverageAnnualReturnYear05	2.24%
10 Years	rr_AverageAnnualReturnYear10	4.17%
Putnam Minnesota Tax Exempt Income Fund | Class A | after taxes on distributions
Prospectus [Line Items]	rr_ProspectusLineItems
1 Year	rr_AverageAnnualReturnYear01	(3.64%)
5 Years	rr_AverageAnnualReturnYear05	2.22%
10 Years	rr_AverageAnnualReturnYear10	4.13%
Putnam Minnesota Tax Exempt Income Fund | Class A | after taxes on distributions and sale of fund shares
Prospectus [Line Items]	rr_ProspectusLineItems
1 Year	rr_AverageAnnualReturnYear01	(1.12%)
5 Years	rr_AverageAnnualReturnYear05	2.39%
10 Years	rr_AverageAnnualReturnYear10	4.01%
Putnam Minnesota Tax Exempt Income Fund | Class B
Prospectus [Line Items]	rr_ProspectusLineItems
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	5.00%	[3]
Management fees	rr_ManagementFeesOverAssets	0.43%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.85%
Other expenses	rr_OtherExpensesOverAssets	0.21%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.49%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 652
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	771
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,013
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,611
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	152
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	471
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	813
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,611
1 Year	rr_AverageAnnualReturnYear01	(5.12%)
5 Years	rr_AverageAnnualReturnYear05	2.07%
10 Years	rr_AverageAnnualReturnYear10	4.08%
Putnam Minnesota Tax Exempt Income Fund | Class C
Prospectus [Line Items]	rr_ProspectusLineItems
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	1.00%	[4]
Management fees	rr_ManagementFeesOverAssets	0.43%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other expenses	rr_OtherExpensesOverAssets	0.21%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.64%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 267
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	517
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	892
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,944
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	167
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	517
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	892
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,944
1 Year	rr_AverageAnnualReturnYear01	(1.25%)
5 Years	rr_AverageAnnualReturnYear05	2.30%
10 Years	rr_AverageAnnualReturnYear10	3.81%
Putnam Minnesota Tax Exempt Income Fund | Class M
Prospectus [Line Items]	rr_ProspectusLineItems
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	3.25%
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	0.43%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.50%
Other expenses	rr_OtherExpensesOverAssets	0.21%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.14%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 437
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	675
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	932
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 1,666
1 Year	rr_AverageAnnualReturnYear01	(3.11%)
5 Years	rr_AverageAnnualReturnYear05	2.11%
10 Years	rr_AverageAnnualReturnYear10	3.98%
Putnam Minnesota Tax Exempt Income Fund | Class R6
Prospectus [Line Items]	rr_ProspectusLineItems
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	0.43%
Other expenses	rr_OtherExpensesOverAssets	0.18%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.61%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 62
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	195
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	340
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 762
1 Year	rr_AverageAnnualReturnYear01	0.62%	[5]
5 Years	rr_AverageAnnualReturnYear05	3.31%	[5]
10 Years	rr_AverageAnnualReturnYear10	4.86%	[5]
Putnam Minnesota Tax Exempt Income Fund | Class Y
Prospectus [Line Items]	rr_ProspectusLineItems
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	0.43%
Other expenses	rr_OtherExpensesOverAssets	0.21%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.64%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 65
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	205
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	357
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 798
1 Year	rr_AverageAnnualReturnYear01	0.62%
5 Years	rr_AverageAnnualReturnYear05	3.31%
10 Years	rr_AverageAnnualReturnYear10	4.86%
Putnam New Jersey Tax Exempt Income Fund
Prospectus [Line Items]	rr_ProspectusLineItems
Risk/Return [Heading]	rr_RiskReturnHeading	Fund Summary
Objective [Heading]	rr_ObjectiveHeading	Goal
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	Putnam New Jersey Tax Exempt Income Fund seeks as high a level of current income exempt from federal income tax and New Jersey personal income tax as we believe is consistent with preservation of capital.
Expense [Heading]	rr_ExpenseHeading	Fees and expenses
Expense Narrative [Text Block]	rr_ExpenseNarrativeTextBlock	The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in class A shares or $50,000 in class M shares of Putnam funds. More information about these and other discounts is available from your financial advisor and in How do I buy fund shares? beginning on page 31 of the fund’s prospectus, in the Appendix to the fund’s prospectus, and in How to buy shares beginning on page II-1 of the fund’s statement of additional information (SAI).
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)
Portfolio Turnover [Heading]	rr_PortfolioTurnoverHeading	Portfolio turnover
Portfolio Turnover [Text Block]	rr_PortfolioTurnoverTextBlock	The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs and may result in higher taxes when the fund’s shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 11%.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	11.00%
Expense Breakpoint Discounts [Text]	rr_ExpenseBreakpointDiscounts	You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in class A shares or $50,000 in class M shares of Putnam funds. More information about these and other discounts is available from your financial advisor and in How do I buy fund shares? beginning on page 31 of the fund's prospectus, in the Appendix to the fund's prospectus, and in How to buy shares beginning on page II-1 of the fund's statement of additional information (SAI).
Expense Breakpoint, Minimum Investment Required [Amount]	rr_ExpenseBreakpointMinimumInvestmentRequiredAmount	$ 50,000
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.
Strategy [Heading]	rr_StrategyHeading	Investments, risks, and performance
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	Investments We invest mainly in bonds that pay interest that is exempt from federal income tax and New Jersey personal income tax (but that may be subject to federal alternative minimum tax (AMT)), are investment-grade in quality, and have intermediate- to long-term maturities (i.e., three years or longer). Under normal circumstances, we invest at least 80% of the fund’s net assets in tax-exempt investments. Tax-exempt investments are issued by or for states, territories or possessions of the United States or by their political subdivisions, agencies, authorities or other government entities, and the income from these investments is exempt from both federal and New Jersey personal income tax. This investment policy cannot be changed without the approval of the fund’s shareholders. We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell investments.
Risk [Heading]	rr_RiskHeading	Risks
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	It is important to understand that you can lose money by investing in the fund. The value of investments in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical events or changes, and factors related to a specific issuer, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity in the fund’s portfolio holdings. The risks associated with bond investments include interest rate risk, which means the value of the fund’s investments is likely to fall if interest rates rise. Bond investments also are subject to credit risk, which is the risk that the issuers of the fund’s investments may default on payment of interest or principal. Since the fund invests in tax-exempt bonds, which, to be treated as tax-exempt under the Internal Revenue Code, may be issued only by limited types of issuers for limited types of projects, the fund’s investments may be focused in certain market segments. Consequently, the fund may be more vulnerable to fluctuations in the values of the securities it holds than a fund that invests more broadly. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds, which can be more sensitive to changes in markets, credit conditions, and interest rates. The fund’s performance will be closely tied to the economic and political conditions in New Jersey, and can be more volatile than the performance of a more geographically diversified fund. To the extent investments in securities of issuers located outside of New Jersey are made, the fund may also be exposed to the risks affecting other states. Interest the fund receives might be taxable. The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Lose Money [Text]	rr_RiskLoseMoney	It is important to understand that you can lose money by investing in the fund.
Risk Not Insured Depository Institution [Text]	rr_RiskNotInsuredDepositoryInstitution	An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	Performance
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The bar chart does not reflect the impact of sales charges. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results. Monthly performance figures for the fund are available at putnam.com.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	putnam.com
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading]	rr_BarChartHeading	Annual total returns for class A shares before sales charges
Bar Chart Does Not Reflect Sales Loads [Text]	rr_BarChartDoesNotReflectSalesLoads	The bar chart does not reflect the impact of sales charges. If it did, performance would be lower.
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Year-to-date performance through 6/30/19  4.84% Best calendar quarter Q3 2009   8.26% Worst calendar quarter Q4 2010 −4.47%
Year to Date Return, Label	rr_YearToDateReturnLabel	Year-to-date performance
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Jun. 30, 2019
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	4.84%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best calendar quarter
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Sep. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	8.26%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst calendar quarter
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2010
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(4.47%)
Performance Table Heading	rr_PerformanceTableHeading	Average annual total returns after sales charges (for periods ended 12/31/18)
Performance Table Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	After-tax returns reflect the historical highest individual federal marginal income tax rates and do not reflect state and local taxes.
Performance Table Not Relevant to Tax Deferred	rr_PerformanceTableNotRelevantToTaxDeferred	Actual after-tax returns depend on an investor's tax situation and may differ from those shown.
Performance Table One Class of after Tax Shown [Text]	rr_PerformanceTableOneClassOfAfterTaxShown	After-tax returns are shown for class A shares only and will vary for other classes.
Performance Table Closing [Text Block]	rr_PerformanceTableClosingTextBlock	After-tax returns reflect the historical highest individual federal marginal income tax rates and do not reflect state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are shown for class A shares only and will vary for other classes. These after-tax returns do not apply if you hold your fund shares through a 401(k) plan, an IRA, or another tax-advantaged arrangement. Class B share performance reflects conversion to class A shares after eight years.
Putnam New Jersey Tax Exempt Income Fund | Bloomberg Barclays Municipal Bond Index (no deduction for fees, expenses or taxes)
Prospectus [Line Items]	rr_ProspectusLineItems
1 Year	rr_AverageAnnualReturnYear01	1.28%
5 Years	rr_AverageAnnualReturnYear05	3.82%
10 Years	rr_AverageAnnualReturnYear10	4.85%
Putnam New Jersey Tax Exempt Income Fund | Class A
Prospectus [Line Items]	rr_ProspectusLineItems
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	4.00%
Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	1.00%	[1]
Management fees	rr_ManagementFeesOverAssets	0.43%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.22%	[2]
Other expenses	rr_OtherExpensesOverAssets	0.15%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.80%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 479
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	646
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	828
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 1,353
Annual Return 2009	rr_AnnualReturn2009	14.97%
Annual Return 2010	rr_AnnualReturn2010	1.84%
Annual Return 2011	rr_AnnualReturn2011	9.97%
Annual Return 2012	rr_AnnualReturn2012	7.05%
Annual Return 2013	rr_AnnualReturn2013	(5.15%)
Annual Return 2014	rr_AnnualReturn2014	8.84%
Annual Return 2015	rr_AnnualReturn2015	2.00%
Annual Return 2016	rr_AnnualReturn2016	0.18%
Annual Return 2017	rr_AnnualReturn2017	5.57%
Annual Return 2018	rr_AnnualReturn2018	1.07%
1 Year	rr_AverageAnnualReturnYear01	(2.97%)
5 Years	rr_AverageAnnualReturnYear05	2.64%
10 Years	rr_AverageAnnualReturnYear10	4.07%
Putnam New Jersey Tax Exempt Income Fund | Class A | after taxes on distributions
Prospectus [Line Items]	rr_ProspectusLineItems
1 Year	rr_AverageAnnualReturnYear01	(3.02%)
5 Years	rr_AverageAnnualReturnYear05	2.60%
10 Years	rr_AverageAnnualReturnYear10	4.04%
Putnam New Jersey Tax Exempt Income Fund | Class A | after taxes on distributions and sale of fund shares
Prospectus [Line Items]	rr_ProspectusLineItems
1 Year	rr_AverageAnnualReturnYear01	(0.55%)
5 Years	rr_AverageAnnualReturnYear05	2.78%
10 Years	rr_AverageAnnualReturnYear10	4.00%
Putnam New Jersey Tax Exempt Income Fund | Class B
Prospectus [Line Items]	rr_ProspectusLineItems
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	5.00%	[3]
Management fees	rr_ManagementFeesOverAssets	0.43%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.85%
Other expenses	rr_OtherExpensesOverAssets	0.15%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.43%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 646
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	752
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	982
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,542
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	146
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	452
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	782
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,542
1 Year	rr_AverageAnnualReturnYear01	(4.45%)
5 Years	rr_AverageAnnualReturnYear05	2.48%
10 Years	rr_AverageAnnualReturnYear10	3.96%
Putnam New Jersey Tax Exempt Income Fund | Class C
Prospectus [Line Items]	rr_ProspectusLineItems
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	1.00%	[4]
Management fees	rr_ManagementFeesOverAssets	0.43%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other expenses	rr_OtherExpensesOverAssets	0.15%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.58%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 261
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	499
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	860
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,878
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	161
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	499
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	860
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,878
1 Year	rr_AverageAnnualReturnYear01	(0.79%)
5 Years	rr_AverageAnnualReturnYear05	2.68%
10 Years	rr_AverageAnnualReturnYear10	3.68%
Putnam New Jersey Tax Exempt Income Fund | Class M
Prospectus [Line Items]	rr_ProspectusLineItems
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	3.25%
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	0.43%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.50%
Other expenses	rr_OtherExpensesOverAssets	0.15%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.08%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 432
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	657
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	901
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 1,599
1 Year	rr_AverageAnnualReturnYear01	(2.59%)
5 Years	rr_AverageAnnualReturnYear05	2.52%
10 Years	rr_AverageAnnualReturnYear10	3.86%
Putnam New Jersey Tax Exempt Income Fund | Class R6
Prospectus [Line Items]	rr_ProspectusLineItems
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	0.43%
Other expenses	rr_OtherExpensesOverAssets	0.14%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.57%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 58
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	183
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	318
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 714
1 Year	rr_AverageAnnualReturnYear01	1.32%	[5]
5 Years	rr_AverageAnnualReturnYear05	3.74%	[5]
10 Years	rr_AverageAnnualReturnYear10	4.74%	[5]
Putnam New Jersey Tax Exempt Income Fund | Class Y
Prospectus [Line Items]	rr_ProspectusLineItems
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	0.43%
Other expenses	rr_OtherExpensesOverAssets	0.15%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.58%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 59
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	186
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	324
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 726
1 Year	rr_AverageAnnualReturnYear01	1.30%
5 Years	rr_AverageAnnualReturnYear05	3.73%
10 Years	rr_AverageAnnualReturnYear10	4.73%
Putnam Ohio Tax Exempt Income Fund
Prospectus [Line Items]	rr_ProspectusLineItems
Risk/Return [Heading]	rr_RiskReturnHeading	Fund Summary
Objective [Heading]	rr_ObjectiveHeading	Goal
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	Putnam Ohio Tax Exempt Income Fund seeks as high a level of current income exempt from federal income tax and Ohio personal income tax as we believe is consistent with preservation of capital.
Expense [Heading]	rr_ExpenseHeading	Fees and expenses
Expense Narrative [Text Block]	rr_ExpenseNarrativeTextBlock	The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in class A shares or $50,000 in class M shares of Putnam funds. More information about these and other discounts is available from your financial advisor and in How do I buy fund shares? beginning on page 31 of the fund’s prospectus, in the Appendix to the fund’s prospectus, and in How to buy shares beginning on page II-1 of the fund’s statement of additional information (SAI).
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)
Portfolio Turnover [Heading]	rr_PortfolioTurnoverHeading	Portfolio turnover
Portfolio Turnover [Text Block]	rr_PortfolioTurnoverTextBlock	The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs and may result in higher taxes when the fund’s shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 19%.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	19.00%
Expense Breakpoint Discounts [Text]	rr_ExpenseBreakpointDiscounts	You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in class A shares or $50,000 in class M shares of Putnam funds. More information about these and other discounts is available from your financial advisor and in How do I buy fund shares? beginning on page 31 of the fund's prospectus, in the Appendix to the fund's prospectus, and in How to buy shares beginning on page II-1 of the fund's statement of additional information (SAI).
Expense Breakpoint, Minimum Investment Required [Amount]	rr_ExpenseBreakpointMinimumInvestmentRequiredAmount	$ 50,000
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.
Strategy [Heading]	rr_StrategyHeading	Investments, risks, and performance
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	Investments We invest mainly in bonds that pay interest that is exempt from federal income tax and Ohio personal income tax (but that may be subject to federal alternative minimum tax (AMT)), are investment-grade in quality, and have intermediate- to long-term maturities (i.e., three years or longer). Under normal circumstances, we invest at least 80% of the fund’s net assets in tax-exempt investments. Tax-exempt investments are issued by or for states, territories or possessions of the United States or by their political subdivisions, agencies, authorities or other government entities, and the income from these investments is exempt from both federal and Ohio personal income tax. This investment policy cannot be changed without the approval of the fund’s shareholders. We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell investments.
Risk [Heading]	rr_RiskHeading	Risks
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	It is important to understand that you can lose money by investing in the fund. The value of investments in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical events or changes, and factors related to a specific issuer, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity in the fund’s portfolio holdings. The risks associated with bond investments include interest rate risk, which means the value of the fund’s investments is likely to fall if interest rates rise. Bond investments also are subject to credit risk, which is the risk that the issuers of the fund’s investments may default on payment of interest or principal. Since the fund invests in tax-exempt bonds, which, to be treated as tax-exempt under the Internal Revenue Code, may be issued only by limited types of issuers for limited types of projects, the fund’s investments may be focused in certain market segments. Consequently, the fund may be more vulnerable to fluctuations in the values of the securities it holds than a fund that invests more broadly. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds, which can be more sensitive to changes in markets, credit conditions, and interest rates. The fund’s performance will be closely tied to the economic and political conditions in Ohio, and can be more volatile than the performance of a more geographically diversified fund. To the extent investments in securities of issuers located outside of Ohio are made, the fund may also be exposed to the risks affecting other states. Interest the fund receives might be taxable. The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Lose Money [Text]	rr_RiskLoseMoney	It is important to understand that you can lose money by investing in the fund.
Risk Not Insured Depository Institution [Text]	rr_RiskNotInsuredDepositoryInstitution	An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	Performance
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The bar chart does not reflect the impact of sales charges. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results. Monthly performance figures for the fund are available at putnam.com.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	putnam.com
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading]	rr_BarChartHeading	Annual total returns for class A shares before sales charges
Bar Chart Does Not Reflect Sales Loads [Text]	rr_BarChartDoesNotReflectSalesLoads	The bar chart does not reflect the impact of sales charges. If it did, performance would be lower.
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Year-to-date performance through 6/30/19  4.43% Best calendar quarter Q3 2009   7.12% Worst calendar quarter Q4 2010 −4.37%
Year to Date Return, Label	rr_YearToDateReturnLabel	Year-to-date performance
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Jun. 30, 2019
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	4.43%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best calendar quarter
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Sep. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	7.12%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst calendar quarter
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2010
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(4.37%)
Performance Table Heading	rr_PerformanceTableHeading	Average annual total returns after sales charges (for periods ended 12/31/18)
Performance Table Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	After-tax returns reflect the historical highest individual federal marginal income tax rates and do not reflect state and local taxes.
Performance Table Not Relevant to Tax Deferred	rr_PerformanceTableNotRelevantToTaxDeferred	Actual after-tax returns depend on an investor's tax situation and may differ from those shown.
Performance Table One Class of after Tax Shown [Text]	rr_PerformanceTableOneClassOfAfterTaxShown	After-tax returns are shown for class A shares only and will vary for other classes.
Performance Table Closing [Text Block]	rr_PerformanceTableClosingTextBlock	After-tax returns reflect the historical highest individual federal marginal income tax rates and do not reflect state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are shown for class A shares only and will vary for other classes. These after-tax returns do not apply if you hold your fund shares through a 401(k) plan, an IRA, or another tax-advantaged arrangement. Class B share performance reflects conversion to class A shares after eight years.
Putnam Ohio Tax Exempt Income Fund | Bloomberg Barclays Municipal Bond Index (no deduction for fees, expenses or taxes)
Prospectus [Line Items]	rr_ProspectusLineItems
1 Year	rr_AverageAnnualReturnYear01	1.28%
5 Years	rr_AverageAnnualReturnYear05	3.82%
10 Years	rr_AverageAnnualReturnYear10	4.85%
Putnam Ohio Tax Exempt Income Fund | Class A
Prospectus [Line Items]	rr_ProspectusLineItems
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	4.00%
Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	1.00%	[1]
Management fees	rr_ManagementFeesOverAssets	0.43%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.22%	[2]
Other expenses	rr_OtherExpensesOverAssets	0.19%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.84%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 482
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	657
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	847
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 1,396
Annual Return 2009	rr_AnnualReturn2009	13.13%
Annual Return 2010	rr_AnnualReturn2010	0.84%
Annual Return 2011	rr_AnnualReturn2011	9.85%
Annual Return 2012	rr_AnnualReturn2012	6.48%
Annual Return 2013	rr_AnnualReturn2013	(3.78%)
Annual Return 2014	rr_AnnualReturn2014	8.23%
Annual Return 2015	rr_AnnualReturn2015	2.47%
Annual Return 2016	rr_AnnualReturn2016	0.22%
Annual Return 2017	rr_AnnualReturn2017	4.31%
Annual Return 2018	rr_AnnualReturn2018	0.58%
1 Year	rr_AverageAnnualReturnYear01	(3.44%)
5 Years	rr_AverageAnnualReturnYear05	2.28%
10 Years	rr_AverageAnnualReturnYear10	3.69%
Putnam Ohio Tax Exempt Income Fund | Class A | after taxes on distributions
Prospectus [Line Items]	rr_ProspectusLineItems
1 Year	rr_AverageAnnualReturnYear01	(3.45%)
5 Years	rr_AverageAnnualReturnYear05	2.28%
10 Years	rr_AverageAnnualReturnYear10	3.69%
Putnam Ohio Tax Exempt Income Fund | Class A | after taxes on distributions and sale of fund shares
Prospectus [Line Items]	rr_ProspectusLineItems
1 Year	rr_AverageAnnualReturnYear01	(0.99%)
5 Years	rr_AverageAnnualReturnYear05	2.45%
10 Years	rr_AverageAnnualReturnYear10	3.66%
Putnam Ohio Tax Exempt Income Fund | Class B
Prospectus [Line Items]	rr_ProspectusLineItems
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	5.00%	[3]
Management fees	rr_ManagementFeesOverAssets	0.43%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.85%
Other expenses	rr_OtherExpensesOverAssets	0.19%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.47%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 650
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	765
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,003
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,587
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	150
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	465
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	803
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,587
1 Year	rr_AverageAnnualReturnYear01	(4.83%)
5 Years	rr_AverageAnnualReturnYear05	2.12%
10 Years	rr_AverageAnnualReturnYear10	3.60%
Putnam Ohio Tax Exempt Income Fund | Class C
Prospectus [Line Items]	rr_ProspectusLineItems
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	1.00%	[4]
Management fees	rr_ManagementFeesOverAssets	0.43%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other expenses	rr_OtherExpensesOverAssets	0.19%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.62%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 265
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	511
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	881
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,922
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	165
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	511
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	881
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,922
1 Year	rr_AverageAnnualReturnYear01	(1.18%)
5 Years	rr_AverageAnnualReturnYear05	2.33%
10 Years	rr_AverageAnnualReturnYear10	3.31%
Putnam Ohio Tax Exempt Income Fund | Class M
Prospectus [Line Items]	rr_ProspectusLineItems
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	3.25%
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	0.43%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.50%
Other expenses	rr_OtherExpensesOverAssets	0.19%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.12%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 435
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	669
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	922
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 1,644
1 Year	rr_AverageAnnualReturnYear01	(2.85%)
5 Years	rr_AverageAnnualReturnYear05	2.16%
10 Years	rr_AverageAnnualReturnYear10	3.50%
Putnam Ohio Tax Exempt Income Fund | Class R6
Prospectus [Line Items]	rr_ProspectusLineItems
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	0.43%
Other expenses	rr_OtherExpensesOverAssets	0.16%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.59%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 60
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	189
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	329
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 738
1 Year	rr_AverageAnnualReturnYear01	0.79%	[5]
5 Years	rr_AverageAnnualReturnYear05	3.35%	[5]
10 Years	rr_AverageAnnualReturnYear10	4.36%	[5]
Putnam Ohio Tax Exempt Income Fund | Class Y
Prospectus [Line Items]	rr_ProspectusLineItems
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	0.43%
Other expenses	rr_OtherExpensesOverAssets	0.19%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.62%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 63
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	199
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	346
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 774
1 Year	rr_AverageAnnualReturnYear01	0.81%
5 Years	rr_AverageAnnualReturnYear05	3.35%
10 Years	rr_AverageAnnualReturnYear10	4.36%
Putnam Pennsylvania Tax Exempt Income Fund
Prospectus [Line Items]	rr_ProspectusLineItems
Risk/Return [Heading]	rr_RiskReturnHeading	Fund Summary
Objective [Heading]	rr_ObjectiveHeading	Goal
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	Putnam Pennsylvania Tax Exempt Income Fund seeks as high a level of current income exempt from federal income tax and Pennsylvania personal income tax as we believe is consistent with preservation of capital.
Expense [Heading]	rr_ExpenseHeading	Fees and expenses
Expense Narrative [Text Block]	rr_ExpenseNarrativeTextBlock	The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in class A shares or $50,000 in class M shares of Putnam funds. More information about these and other discounts is available from your financial advisor and in How do I buy fund shares? beginning on page 31 of the fund’s prospectus, in the Appendix to the fund’s prospectus, and in How to buy shares beginning on page II-1 of the fund’s statement of additional information (SAI).
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)
Portfolio Turnover [Heading]	rr_PortfolioTurnoverHeading	Portfolio turnover
Portfolio Turnover [Text Block]	rr_PortfolioTurnoverTextBlock	The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs and may result in higher taxes when the fund’s shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 12%.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	12.00%
Expense Breakpoint Discounts [Text]	rr_ExpenseBreakpointDiscounts	You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in class A shares or $50,000 in class M shares of Putnam funds. More information about these and other discounts is available from your financial advisor and in How do I buy fund shares? beginning on page 31 of the fund's prospectus, in the Appendix to the fund's prospectus, and in How to buy shares beginning on page II-1 of the fund's statement of additional information (SAI).
Expense Breakpoint, Minimum Investment Required [Amount]	rr_ExpenseBreakpointMinimumInvestmentRequiredAmount	$ 50,000
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.
Strategy [Heading]	rr_StrategyHeading	Investments, risks, and performance
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	Investments We invest mainly in bonds that pay interest that is exempt from federal income tax and Pennsylvania personal income tax (but that may be subject to federal alternative minimum tax (AMT)), are investment-grade in quality, and have intermediate- to long-term maturities (i.e., three years or longer). Under normal circumstances, we invest at least 80% of the fund’s net assets in tax-exempt investments. Tax-exempt investments are issued by or for states, territories or possessions of the United States or by their political subdivisions, agencies, authorities or other government entities, and the income from these investments is exempt from both federal and Pennsylvania personal income tax. This investment policy cannot be changed without the approval of the fund’s shareholders. We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell investments.
Risk [Heading]	rr_RiskHeading	Risks
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	It is important to understand that you can lose money by investing in the fund. The value of investments in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical events or changes, and factors related to a specific issuer, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity in the fund’s portfolio holdings. The risks associated with bond investments include interest rate risk, which means the value of the fund’s investments is likely to fall if interest rates rise. Bond investments also are subject to credit risk, which is the risk that the issuers of the fund’s investments may default on payment of interest or principal. Since the fund invests in tax-exempt bonds, which, to be treated as tax-exempt under the Internal Revenue Code, may be issued only by limited types of issuers for limited types of projects, the fund’s investments may be focused in certain market segments. Consequently, the fund may be more vulnerable to fluctuations in the values of the securities it holds than a fund that invests more broadly. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds, which can be more sensitive to changes in markets, credit conditions, and interest rates. The fund’s performance will be closely tied to the economic and political conditions in Pennsylvania, and can be more volatile than the performance of a more geographically diversified fund. To the extent investments in securities of issuers located outside of Pennsylvania are made, the fund may also be exposed to the risks affecting other states. Interest the fund receives might be taxable. The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Lose Money [Text]	rr_RiskLoseMoney	It is important to understand that you can lose money by investing in the fund.
Risk Not Insured Depository Institution [Text]	rr_RiskNotInsuredDepositoryInstitution	An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	Performance
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The bar chart does not reflect the impact of sales charges. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results. Monthly performance figures for the fund are available at putnam.com.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	putnam.com
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	Please remember that past performance is not necessarily an indication of future results.
Bar Chart [Heading]	rr_BarChartHeading	Annual total returns for class A shares before sales charges
Bar Chart Does Not Reflect Sales Loads [Text]	rr_BarChartDoesNotReflectSalesLoads	The bar chart does not reflect the impact of sales charges. If it did, performance would be lower.
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Year-to-date performance through 6/30/19  4.90% Best calendar quarter Q3 2009   6.87% Worst calendar quarter Q4 2010 −4.41%
Year to Date Return, Label	rr_YearToDateReturnLabel	Year-to-date performance
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Jun. 30, 2019
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	4.90%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best calendar quarter
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Sep. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	6.87%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst calendar quarter
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2010
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(4.41%)
Performance Table Heading	rr_PerformanceTableHeading	Average annual total returns after sales charges (for periods ended 12/31/18)
Performance Table Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	After-tax returns reflect the historical highest individual federal marginal income tax rates and do not reflect state and local taxes.
Performance Table Not Relevant to Tax Deferred	rr_PerformanceTableNotRelevantToTaxDeferred	Actual after-tax returns depend on an investor's tax situation and may differ from those shown.
Performance Table One Class of after Tax Shown [Text]	rr_PerformanceTableOneClassOfAfterTaxShown	After-tax returns are shown for class A shares only and will vary for other classes.
Performance Table Closing [Text Block]	rr_PerformanceTableClosingTextBlock	After-tax returns reflect the historical highest individual federal marginal income tax rates and do not reflect state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are shown for class A shares only and will vary for other classes. These after-tax returns do not apply if you hold your fund shares through a 401(k) plan, an IRA, or another tax-advantaged arrangement. Class B share performance reflects conversion to class A shares after eight years.
Putnam Pennsylvania Tax Exempt Income Fund | Bloomberg Barclays Municipal Bond Index (no deduction for fees, expenses or taxes)
Prospectus [Line Items]	rr_ProspectusLineItems
1 Year	rr_AverageAnnualReturnYear01	1.28%
5 Years	rr_AverageAnnualReturnYear05	3.82%
10 Years	rr_AverageAnnualReturnYear10	4.85%
Putnam Pennsylvania Tax Exempt Income Fund | Class A
Prospectus [Line Items]	rr_ProspectusLineItems
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	4.00%
Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	1.00%	[1]
Management fees	rr_ManagementFeesOverAssets	0.43%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.23%	[2]
Other expenses	rr_OtherExpensesOverAssets	0.17%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.83%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 481
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	654
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	842
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 1,384
Annual Return 2009	rr_AnnualReturn2009	14.87%
Annual Return 2010	rr_AnnualReturn2010	1.66%
Annual Return 2011	rr_AnnualReturn2011	9.55%
Annual Return 2012	rr_AnnualReturn2012	7.24%
Annual Return 2013	rr_AnnualReturn2013	(4.56%)
Annual Return 2014	rr_AnnualReturn2014	9.40%
Annual Return 2015	rr_AnnualReturn2015	2.60%
Annual Return 2016	rr_AnnualReturn2016	0.36%
Annual Return 2017	rr_AnnualReturn2017	4.76%
Annual Return 2018	rr_AnnualReturn2018	0.54%
1 Year	rr_AverageAnnualReturnYear01	(3.48%)
5 Years	rr_AverageAnnualReturnYear05	2.64%
10 Years	rr_AverageAnnualReturnYear10	4.08%
Putnam Pennsylvania Tax Exempt Income Fund | Class A | after taxes on distributions
Prospectus [Line Items]	rr_ProspectusLineItems
1 Year	rr_AverageAnnualReturnYear01	(3.52%)
5 Years	rr_AverageAnnualReturnYear05	2.62%
10 Years	rr_AverageAnnualReturnYear10	4.07%
Putnam Pennsylvania Tax Exempt Income Fund | Class A | after taxes on distributions and sale of fund shares
Prospectus [Line Items]	rr_ProspectusLineItems
1 Year	rr_AverageAnnualReturnYear01	(0.94%)
5 Years	rr_AverageAnnualReturnYear05	2.75%
10 Years	rr_AverageAnnualReturnYear10	4.00%
Putnam Pennsylvania Tax Exempt Income Fund | Class B
Prospectus [Line Items]	rr_ProspectusLineItems
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	5.00%	[3]
Management fees	rr_ManagementFeesOverAssets	0.43%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.85%
Other expenses	rr_OtherExpensesOverAssets	0.17%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.45%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 648
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	759
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	992
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,567
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	148
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	459
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	792
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,567
1 Year	rr_AverageAnnualReturnYear01	(4.98%)
5 Years	rr_AverageAnnualReturnYear05	2.48%
10 Years	rr_AverageAnnualReturnYear10	3.98%
Putnam Pennsylvania Tax Exempt Income Fund | Class C
Prospectus [Line Items]	rr_ProspectusLineItems
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	1.00%	[4]
Management fees	rr_ManagementFeesOverAssets	0.43%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other expenses	rr_OtherExpensesOverAssets	0.17%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.60%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 263
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	505
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	871
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,900
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	163
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	505
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	871
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,900
1 Year	rr_AverageAnnualReturnYear01	(1.21%)
5 Years	rr_AverageAnnualReturnYear05	2.69%
10 Years	rr_AverageAnnualReturnYear10	3.71%
Putnam Pennsylvania Tax Exempt Income Fund | Class M
Prospectus [Line Items]	rr_ProspectusLineItems
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	3.25%
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	0.43%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.50%
Other expenses	rr_OtherExpensesOverAssets	0.17%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.10%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 434
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	663
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	911
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 1,622
1 Year	rr_AverageAnnualReturnYear01	(3.10%)
5 Years	rr_AverageAnnualReturnYear05	2.52%
10 Years	rr_AverageAnnualReturnYear10	3.88%
Putnam Pennsylvania Tax Exempt Income Fund | Class R6
Prospectus [Line Items]	rr_ProspectusLineItems
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	0.43%
Other expenses	rr_OtherExpensesOverAssets	0.14%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.57%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 58
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	183
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	318
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 714
1 Year	rr_AverageAnnualReturnYear01	0.78%	[5]
5 Years	rr_AverageAnnualReturnYear05	3.72%	[5]
10 Years	rr_AverageAnnualReturnYear10	4.75%	[5]
Putnam Pennsylvania Tax Exempt Income Fund | Class Y
Prospectus [Line Items]	rr_ProspectusLineItems
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	0.43%
Other expenses	rr_OtherExpensesOverAssets	0.17%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.60%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 61
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	192
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	335
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 750
1 Year	rr_AverageAnnualReturnYear01	0.77%
5 Years	rr_AverageAnnualReturnYear05	3.71%
10 Years	rr_AverageAnnualReturnYear10	4.75%

[1] Applies only to certain redemptions of shares bought with no initial sales charge.

[2] Represents a blended rate.

[3] This charge is phased out over six years.

[4] This charge is eliminated after one year.

[5] Performance for class R6 shares prior to their inception (5/22/18) is derived from the historical performance of class Y shares and has not been adjusted for the lower investor servicing fees applicable to class R6 shares; had it, returns would have been higher.

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Putnam Minnesota Tax Exempt Income Fund

Fund Summary

Goal

Putnam Minnesota Tax Exempt Income Fund seeks as high a level of current income exempt from federal income tax and Minnesota personal income tax as we believe is consistent with preservation of capital.

Fees and expenses

The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in class A shares or $50,000 in class M shares of Putnam funds. More information about these and other discounts is available from your financial advisor and in How do I buy fund shares? beginning on page 31 of the fund’s prospectus, in the Appendix to the fund’s prospectus, and in How to buy shares beginning on page II-1 of the fund’s statement of additional information (SAI).

Shareholder fees (fees paid directly from your investment)

Shareholder Fees - Putnam Minnesota Tax Exempt Income Fund	Class A		Class B		Class C		Class M	Class R6	Class Y
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	4.00%		none		none		3.25%	none	none
Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)	1.00%	[1]	5.00%	[2]	1.00%	[3]	none	none	none

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

Annual Fund Operating Expenses - Putnam Minnesota Tax Exempt Income Fund	Class A		Class B	Class C	Class M	Class R6	Class Y
Management fees	0.43%		0.43%	0.43%	0.43%	0.43%	0.43%
Distribution and service (12b-1) fees	0.23%	[1]	0.85%	1.00%	0.50%
Other expenses	0.21%		0.21%	0.21%	0.21%	0.18%	0.21%
Total annual fund operating expenses	0.87%		1.49%	1.64%	1.14%	0.61%	0.64%

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 - Putnam Minnesota Tax Exempt Income Fund - USD ($)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
Class A	485	666	862	1,427
Class B	652	771	1,013	1,611
Class C	267	517	892	1,944
Class M	437	675	932	1,666
Class R6	62	195	340	762
Class Y	65	205	357	798

Expense Example, No Redemption - Putnam Minnesota Tax Exempt Income Fund - USD ($)	Expense Example, No Redemption, 1 Year	Expense Example, No Redemption, 3 Years	Expense Example, No Redemption, 5 Years	Expense Example, No Redemption, 10 Years
Class B	152	471	813	1,611
Class C	167	517	892	1,944

Portfolio turnover

The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs and may result in higher taxes when the fund’s shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 19%.

Investments, risks, and performance

Investments
We invest mainly in bonds that pay interest that is exempt from federal income tax and Minnesota personal income tax (but that may be subject to federal alternative minimum tax (AMT)), are investment-grade in quality, and have intermediate- to long-term maturities (i.e., three years or longer). Under normal circumstances, we invest at least 80% of the fund’s net assets in tax-exempt investments. Tax-exempt investments are issued by or for states, territories or possessions of the United States or by their political subdivisions, agencies, authorities or other government entities, and the income from these investments is exempt from both federal and Minnesota personal income tax. This investment policy cannot be changed without the approval of the fund’s shareholders. We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell investments.

Risks

It is important to understand that you can lose money by investing in the fund.

The value of investments in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical events or changes, and factors related to a specific issuer, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity in the fund’s portfolio holdings.

The risks associated with bond investments include interest rate risk, which means the value of the fund’s investments is likely to fall if interest rates rise. Bond investments also are subject to credit risk, which is the risk that the issuers of the fund’s investments may default on payment of interest or principal. Since the fund invests in tax-exempt bonds, which, to be treated as tax-exempt under the Internal Revenue Code, may be issued only by limited types of issuers for limited types of projects, the fund’s investments may be focused in certain market segments. Consequently, the fund may be more vulnerable to fluctuations in the values of the securities it holds than a fund that invests more broadly. Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds, which can be more sensitive to changes in markets, credit conditions, and interest rates. The fund’s performance will be closely tied to the economic and political conditions in Minnesota, and can be more volatile than the performance of a more geographically diversified fund. To the extent investments in securities of issuers located outside of Minnesota are made, the fund may also be exposed to the risks affecting other states. Interest the fund receives might be taxable.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Performance

The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund’s performance year to year and over time. The bar chart does not reflect the impact of sales charges. If it did, performance would be lower. Please remember that past performance is not necessarily an indication of future results. Monthly performance figures for the fund are available at putnam.com.

Annual total returns for class A shares before sales charges

Year-to-date performance
through 6/30/19  4.67%

Best calendar quarter
Q3 2009   6.51%

Worst calendar quarter
Q4 2010 −4.22%

Average annual total returns after sales charges (for periods ended 12/31/18)

Average Annual Total Returns - Putnam Minnesota Tax Exempt Income Fund		1 Year	5 Years	10 Years
Class A		(3.63%)	2.24%	4.17%
Class A | after taxes on distributions		(3.64%)	2.22%	4.13%
Class A | after taxes on distributions and sale of fund shares		(1.12%)	2.39%	4.01%
Class B		(5.12%)	2.07%	4.08%
Class C		(1.25%)	2.30%	3.81%
Class M		(3.11%)	2.11%	3.98%
Class R6	[1]	0.62%	3.31%	4.86%
Class Y		0.62%	3.31%	4.86%
Bloomberg Barclays Municipal Bond Index (no deduction for fees, expenses or taxes)		1.28%	3.82%	4.85%

After-tax returns reflect the historical highest individual federal marginal income tax rates and do not reflect state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are shown for class A shares only and will vary for other classes. These after-tax returns do not apply if you hold your fund shares through a 401(k) plan, an IRA, or another tax-advantaged arrangement.

Class B share performance reflects conversion to class A shares after eight years.

[1] Applies only to certain redemptions of shares bought with no initial sales charge.

[2] This charge is phased out over six years.

[3] This charge is eliminated after one year.

[1] Represents a blended rate.

[1] Performance for class R6 shares prior to their inception (5/22/18) is derived from the historical performance of class Y shares and has not been adjusted for the lower investor servicing fees applicable to class R6 shares; had it, returns would have been higher.