Legg Mason Partners Income Trust N-CSR 26 Sep 24 Certified annual shareholder report (management investment company) Financial data

Form N-CSR Cover

Form N-CSR Cover	12 Months Ended
	Jul. 31, 2024
Shareholder Report [Line Items]
Document Type	N-CSR
Amendment Flag	false
Registrant Name	Legg Mason Partners Income Trust
Entity Central Index Key	0000764624
Entity Investment Company Type	N-1A
Document Period End Date	Jul. 31, 2024

Shareholder Report

Shareholder Report	12 Months Ended
	Jul. 31, 2024 USD ($) $ / shares
Shareholder Report [Line Items]
Document Type	N-CSR
Amendment Flag	false
Registrant Name	Legg Mason Partners Income Trust
Entity Central Index Key	0000764624
Entity Investment Company Type	N-1A
Document Period End Date	Jul. 31, 2024
Class A
Shareholder Report [Line Items]
Fund Name	Western Asset Municipal High Income Fund
Class Name	Class A
Trading Symbol	STXAX
Annual or Semi-Annual Statement [Text Block]	This annual shareholder report contains important information about Western Asset Municipal High Income Fund for the period August 1, 2023, to July 31, 2024.
Shareholder Report Annual or Semi-Annual	annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents . You can also request this information by contacting us at 877-6LM-FUND/656-3863 .
Material Fund Change Notice [Text Block]	This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number	877-6LM-FUND/656-3863
Additional Information Website	https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]	WHAT WERE THE FUND COSTS FOR THE LAST YEAR? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $84 0.81%
Expenses Paid, Amount	$ 84
Expense Ratio, Percent	0.81%
Factors Affecting Performance [Text Block]	HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE? For the twelve months ended July 31, 2024, Class A shares of Western Asset Municipal High Income Fund returned 6.73%. The Fund compares its performance to the Bloomberg Municipal Bond Index, which returned 3.74% for the same period. PERFORMANCE HIGHLIGHTS Top contributors to performance: ↑ Yield curve positioning, particularly an overweight to longer maturities ↑ An overweight to lower investment-grade and below investment-grade quality cohorts ↑ An overweight to the industrial revenue sector and security selection in the transportation sector Top detractors from performance: ↓ Duration positioning ↓ Select exposure within the electric utility sector ↓ An overweight to municipal cash equivalents Use of derivatives and the impact on performance: The Fund employed a modest U.S. Treasury futures position as a means to extend duration, as Treasury duration was priced more attractively than municipal duration, in the manager’s view. The position was a modest contributor to performance.
Performance Past Does Not Indicate Future [Text]	The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.
Line Graph [Table Text Block]
Average Annual Return [Table Text Block]	AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended July 31, 2024 1 Year 5 Year 10 Year Class A 6.73 1.74 2.94 Class A (with sales charge) 2.77 0.86 2.49 Bloomberg Municipal Bond Index 3.74 1.18 2.47
No Deduction of Taxes [Text Block]	The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
Updated Performance Information Location [Text Block]	For current month-end performance, please call Franklin Templeton at 877-6LM-FUND/656-3863 or visit https://www.franklintempleton.com/investments/options/mutual-funds .   Important data provider notices and terms available at   www.franklintempletondatasources.com.
Net Assets	$ 334,615,471
Holdings Count | $ / shares	226	[1]
Advisory Fees Paid, Amount	$ 1,399,513
Investment Company Portfolio Turnover	20%
Additional Fund Statistics [Text Block]	KEY FUND STATISTICS (as of July 31, 2024) Total Net Assets $334,615,471 Total Number of Portfolio Holdings * 226 Total Management Fee Paid $1,399,513 Portfolio Turnover Rate 20%	[1]
Holdings [Text Block]
Material Fund Change [Text Block]	HOW HAS THE FUND CHANGED? Effective March 1, 2024, the Fund’s named portfolio management team consists of Robert E. Amodeo, David T. Fare, John Mooney, Michael C. Buchanan and Ryan K. Brist. This is a summary of certain changes to the Fund since August 1, 2023. For more complete information, you may review the Fund’s current prospectus and any applicable supplements at https://www.franklintempleton.com/regulatory-fund-documents or upon request at 877-6LM-FUND/656-3863 or prospectus franklintempleton.com .
Updated Prospectus Phone Number	877-6LM-FUND/656-3863
Updated Prospectus Email Address	prospectus@franklintempleton.com
Updated Prospectus Web Address	https://www.franklintempleton.com/regulatory-fund-documents
Class C
Shareholder Report [Line Items]
Fund Name	Western Asset Municipal High Income Fund
Class Name	Class C
Trading Symbol	SMHLX
Annual or Semi-Annual Statement [Text Block]	This annual shareholder report contains important information about Western Asset Municipal High Income Fund for the period August 1, 2023, to July 31, 2024.
Shareholder Report Annual or Semi-Annual	annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents . You can also request this information by contacting us at 877-6LM-FUND/656-3863 .
Material Fund Change Notice [Text Block]	This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number	877-6LM-FUND/656-3863
Additional Information Website	https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]	WHAT WERE THE FUND COSTS FOR THE LAST YEAR? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $141 1.37%
Expenses Paid, Amount	$ 141
Expense Ratio, Percent	1.37%
Factors Affecting Performance [Text Block]	HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE? For the twelve months ended July 31, 2024, Class C shares of Western Asset Municipal High Income Fund returned 6.07%. The Fund compares its performance to the Bloomberg Municipal Bond Index, which returned 3.74% for the same period. PERFORMANCE HIGHLIGHTS Top contributors to performance: ↑ Yield curve positioning, particularly an overweight to longer maturities ↑ An overweight to lower investment-grade and below investment-grade quality cohorts ↑ An overweight to the industrial revenue sector and security selection in the transportation sector Top detractors from performance: ↓ Duration positioning ↓ Select exposure within the electric utility sector ↓ An overweight to municipal cash equivalents Use of derivatives and the impact on performance: The Fund employed a modest U.S. Treasury futures position as a means to extend duration, as Treasury duration was priced more attractively than municipal duration, in the manager’s view. The position was a modest contributor to performance.
Performance Past Does Not Indicate Future [Text]	The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.
Line Graph [Table Text Block]
Average Annual Return [Table Text Block]	AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended July 31, 2024 1 Year 5 Year 10 Year Class C 6.07 1.18 2.36 Class C (with sales charge) 5.07 1.18 2.36 Bloomberg Municipal Bond Index 3.74 1.18 2.47
No Deduction of Taxes [Text Block]	The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
Updated Performance Information Location [Text Block]	For current month-end performance, please call Franklin Templeton at 877-6LM-FUND/656-3863 or visit https://www.franklintempleton.com/investments/options/mutual-funds .   Important data provider notices and terms available at   www.franklintempletondatasources.com.
Net Assets	$ 334,615,471
Holdings Count | $ / shares	226	[2]
Advisory Fees Paid, Amount	$ 1,399,513
Investment Company Portfolio Turnover	20%
Additional Fund Statistics [Text Block]	KEY FUND STATISTICS (as of July 31, 2024) Total Net Assets $334,615,471 Total Number of Portfolio Holdings * 226 Total Management Fee Paid $1,399,513 Portfolio Turnover Rate 20%	[2]
Holdings [Text Block]
Material Fund Change [Text Block]	HOW HAS THE FUND CHANGED? Effective March 1, 2024, the Fund’s named portfolio management team consists of Robert E. Amodeo, David T. Fare, John Mooney, Michael C. Buchanan and Ryan K. Brist. This is a summary of certain changes to the Fund since August 1, 2023. For more complete information, you may review the Fund’s current prospectus and any applicable supplements at https://www.franklintempleton.com/regulatory-fund-documents or upon request at 877-6LM-FUND/656-3863 or prospectus franklintempleton.com .
Updated Prospectus Phone Number	877-6LM-FUND/656-3863
Updated Prospectus Email Address	prospectus@franklintempleton.com
Updated Prospectus Web Address	https://www.franklintempleton.com/regulatory-fund-documents
Class I
Shareholder Report [Line Items]
Fund Name	Western Asset Municipal High Income Fund
Class Name	Class I
Trading Symbol	LMHIX
Annual or Semi-Annual Statement [Text Block]	This annual shareholder report contains important information about Western Asset Municipal High Income Fund for the period August 1, 2023, to July 31, 2024.
Shareholder Report Annual or Semi-Annual	annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents . You can also request this information by contacting us at 877-6LM-FUND/656-3863 .
Material Fund Change Notice [Text Block]	This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number	877-6LM-FUND/656-3863
Additional Information Website	https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]	WHAT WERE THE FUND COSTS FOR THE LAST YEAR? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment * Class I $65 0.63%	[3]
Expenses Paid, Amount	$ 65
Expense Ratio, Percent	0.63%
Factors Affecting Performance [Text Block]	HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE? For the twelve months ended July 31, 2024, Class I shares of Western Asset Municipal High Income Fund returned 6.86%. The Fund compares its performance to the Bloomberg Municipal Bond Index, which returned 3.74% for the same period. PERFORMANCE HIGHLIGHTS Top contributors to performance: ↑ Yield curve positioning, particularly an overweight to longer maturities ↑ An overweight to lower investment-grade and below investment-grade quality cohorts ↑ An overweight to the industrial revenue sector and security selection in the transportation sector Top detractors from performance: ↓ Duration positioning ↓ Select exposure within the electric utility sector ↓ An overweight to municipal cash equivalents Use of derivatives and the impact on performance: The Fund employed a modest U.S. Treasury futures position as a means to extend duration, as Treasury duration was priced more attractively than municipal duration, in the manager’s view. The position was a modest contributor to performance.
Performance Past Does Not Indicate Future [Text]	The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.
Line Graph [Table Text Block]
Average Annual Return [Table Text Block]	AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended July 31, 2024 1 Year 5 Year 10 Year Class I 6.86 1.92 3.11 Bloomberg Municipal Bond Index 3.74 1.18 2.47
No Deduction of Taxes [Text Block]	The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
Updated Performance Information Location [Text Block]	For current month-end performance, please call Franklin Templeton at 877-6LM-FUND/656-3863 or visit https://www.franklintempleton.com/investments/options/mutual-funds .   Important data provider notices and terms available at   www.franklintempletondatasources.com.
Net Assets	$ 334,615,471
Holdings Count | $ / shares	226	[4]
Advisory Fees Paid, Amount	$ 1,399,513
Investment Company Portfolio Turnover	20%
Additional Fund Statistics [Text Block]	KEY FUND STATISTICS (as of July 31, 2024) Total Net Assets $334,615,471 Total Number of Portfolio Holdings * 226 Total Management Fee Paid $1,399,513 Portfolio Turnover Rate 20%	[4]
Holdings [Text Block]
Material Fund Change [Text Block]	HOW HAS THE FUND CHANGED? Effective March 1, 2024, the Fund’s named portfolio management team consists of Robert E. Amodeo, David T. Fare, John Mooney, Michael C. Buchanan and Ryan K. Brist. This is a summary of certain changes to the Fund since August 1, 2023. For more complete information, you may review the Fund’s current prospectus and any applicable supplements at https://www.franklintempleton.com/regulatory-fund-documents or upon request at 877-6LM-FUND/656-3863 or prospectus franklintempleton.com .
Updated Prospectus Phone Number	877-6LM-FUND/656-3863
Updated Prospectus Email Address	prospectus@franklintempleton.com
Updated Prospectus Web Address	https://www.franklintempleton.com/regulatory-fund-documents
[1] * Does not include derivatives, except purchased options, if any. * Does not include derivatives, except purchased options, if any. * Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher. * Does not include derivatives, except purchased options, if any.

Shareholder Report, Line Graph

Shareholder Report, Line Graph (Details) - USD ($)	12 Months Ended
	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2014
Class A
Account Value [Line Items]
Line Graph and Table Measure Name	Class A (with sales charge)
Account Value	$ 12,789	$ 11,982	$ 11,932	$ 12,963	$ 12,005	$ 11,733	$ 11,060	$ 10,810	$ 10,766	$ 9,939	$ 9,575
Class C
Account Value [Line Items]
Line Graph and Table Measure Name	Class C (with sales charge)
Account Value	$ 12,628	11,905	11,915	13,007	12,118	11,911	11,290	11,098	11,126	10,321	10,000
Class I
Account Value [Line Items]
Line Graph and Table Measure Name	Class I
Account Value	$ 1,358,765	1,271,554	1,263,136	1,369,810	1,266,175	1,235,380	1,163,154	1,134,997	1,128,847	1,039,631	1,000,000
Bloomberg Municipal Bond Index [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Bloomberg Municipal Bond Index
Account Value	$ 12,762	12,301	12,188	13,095	12,678	12,033	11,214	11,104	11,075	10,356	10,000
Bloomberg Municipal Bond Index [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Bloomberg Municipal Bond Index
Account Value	$ 12,762	12,301	12,188	13,095	12,678	12,033	11,214	11,104	11,075	10,356	10,000
Bloomberg Municipal Bond Index [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Bloomberg Municipal Bond Index
Account Value	$ 1,276,168	$ 1,230,125	$ 1,218,808	$ 1,309,530	$ 1,267,820	$ 1,203,341	$ 1,121,412	$ 1,110,379	$ 1,107,538	$ 1,035,627	$ 1,000,000

Shareholder Report, Average Ann

Shareholder Report, Average Annual Return (Details)	12 Months Ended	60 Months Ended	120 Months Ended
	Jul. 31, 2024	Jul. 31, 2024	Jul. 31, 2024
Class A
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Class A (with sales charge)
Average Annual Return, Percent	2.77%	0.86%	2.49%
Class C
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Class C (with sales charge)
Average Annual Return, Percent	5.07%	1.18%	2.36%
Class I
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Class I
Average Annual Return, Percent	6.86%	1.92%	3.11%
Without Sales Load [Member] | Class A
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Class A
Average Annual Return, Percent	6.73%	1.74%	2.94%
Without Sales Load [Member] | Class C
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Class C
Average Annual Return, Percent	6.07%	1.18%	2.36%
Bloomberg Municipal Bond Index [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Bloomberg Municipal Bond Index
Average Annual Return, Percent	3.74%	1.18%	2.47%
Bloomberg Municipal Bond Index [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Bloomberg Municipal Bond Index
Average Annual Return, Percent	3.74%	1.18%	2.47%
Bloomberg Municipal Bond Index [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Bloomberg Municipal Bond Index
Average Annual Return, Percent	3.74%	1.18%	2.47%

Shareholder Report, Holdings (D

Shareholder Report, Holdings (Details)	Jul. 31, 2024
Class A | Industrial Revenue [Member]
Holdings [Line Items]
Percent of Total Investments	28.40%
Class A | Transportation [Member]
Holdings [Line Items]
Percent of Total Investments	17%
Class A | Education [Member]
Holdings [Line Items]
Percent of Total Investments	9.20%
Class A | Leasing [Member]
Holdings [Line Items]
Percent of Total Investments	8.90%
Class A | Health Care [Member]
Holdings [Line Items]
Percent of Total Investments	8.40%
Class A | Special Tax Obligation [Member]
Holdings [Line Items]
Percent of Total Investments	8%
Class A | Water & Sewer [Member]
Holdings [Line Items]
Percent of Total Investments	5.50%
Class A | Local General Obligation [Member]
Holdings [Line Items]
Percent of Total Investments	5%
Class A | State General Obligation [Member]
Holdings [Line Items]
Percent of Total Investments	4.10%
Class A | Housing [Member]
Holdings [Line Items]
Percent of Total Investments	1.80%
Class A | Power [Member]
Holdings [Line Items]
Percent of Total Investments	1.60%
Class A | Other [Member]
Holdings [Line Items]
Percent of Total Investments	0.70%
Class A | Pre-Refunded/Escrowed to Maturity [Member]
Holdings [Line Items]
Percent of Total Investments	0.20%
Class A | Short-Term Investments [Member]
Holdings [Line Items]
Percent of Total Investments	1.20%
Class C | Industrial Revenue [Member]
Holdings [Line Items]
Percent of Total Investments	28.40%
Class C | Transportation [Member]
Holdings [Line Items]
Percent of Total Investments	17%
Class C | Education [Member]
Holdings [Line Items]
Percent of Total Investments	9.20%
Class C | Leasing [Member]
Holdings [Line Items]
Percent of Total Investments	8.90%
Class C | Health Care [Member]
Holdings [Line Items]
Percent of Total Investments	8.40%
Class C | Special Tax Obligation [Member]
Holdings [Line Items]
Percent of Total Investments	8%
Class C | Water & Sewer [Member]
Holdings [Line Items]
Percent of Total Investments	5.50%
Class C | Local General Obligation [Member]
Holdings [Line Items]
Percent of Total Investments	5%
Class C | State General Obligation [Member]
Holdings [Line Items]
Percent of Total Investments	4.10%
Class C | Housing [Member]
Holdings [Line Items]
Percent of Total Investments	1.80%
Class C | Power [Member]
Holdings [Line Items]
Percent of Total Investments	1.60%
Class C | Other [Member]
Holdings [Line Items]
Percent of Total Investments	0.70%
Class C | Pre-Refunded/Escrowed to Maturity [Member]
Holdings [Line Items]
Percent of Total Investments	0.20%
Class C | Short-Term Investments [Member]
Holdings [Line Items]
Percent of Total Investments	1.20%
Class I | Industrial Revenue [Member]
Holdings [Line Items]
Percent of Total Investments	28.40%
Class I | Transportation [Member]
Holdings [Line Items]
Percent of Total Investments	17%
Class I | Education [Member]
Holdings [Line Items]
Percent of Total Investments	9.20%
Class I | Leasing [Member]
Holdings [Line Items]
Percent of Total Investments	8.90%
Class I | Health Care [Member]
Holdings [Line Items]
Percent of Total Investments	8.40%
Class I | Special Tax Obligation [Member]
Holdings [Line Items]
Percent of Total Investments	8%
Class I | Water & Sewer [Member]
Holdings [Line Items]
Percent of Total Investments	5.50%
Class I | Local General Obligation [Member]
Holdings [Line Items]
Percent of Total Investments	5%
Class I | State General Obligation [Member]
Holdings [Line Items]
Percent of Total Investments	4.10%
Class I | Housing [Member]
Holdings [Line Items]
Percent of Total Investments	1.80%
Class I | Power [Member]
Holdings [Line Items]
Percent of Total Investments	1.60%
Class I | Other [Member]
Holdings [Line Items]
Percent of Total Investments	0.70%
Class I | Pre-Refunded/Escrowed to Maturity [Member]
Holdings [Line Items]
Percent of Total Investments	0.20%
Class I | Short-Term Investments [Member]
Holdings [Line Items]
Percent of Total Investments	1.20%