| Form N-CSR Cover | 6 Months Ended |
| Jun. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| 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 | Jun. 30, 2024 |
| Shareholder Report | 6 Months Ended | |
| Jun. 30, 2024 USD ($) $ / shares | ||
| Shareholder Report [Line Items] | ||
| Document Type | N-CSRS | |
| 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 | Jun. 30, 2024 | |
| Class A | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Western Asset Corporate Bond Fund | |
| Class Name | Class A | |
| Trading Symbol | SIGAX | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Western Asset Corporate Bond Fund for the period January 1, 2024, to June 30, 2024. | |
| Shareholder Report Annual or Semi-Annual | semi-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 . | |
| 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 SIX MONTHS? (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 $44 0.88% | [1],[2] |
| Expenses Paid, Amount | $ 44 | |
| Expense Ratio, Percent | 0.88% | |
| Net Assets | $ 1,004,637,926 | |
| Holdings Count | $ / shares | 740 | [3] |
| Investment Company Portfolio Turnover | 51% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (as of June 30, 2024) Total Net Assets $1,004,637,926 Total Number of Portfolio Holdings * 740 Portfolio Turnover Rate 51% | [3] |
| Holdings [Text Block] | ||
| Updated Prospectus Web Address | https://www.franklintempleton.com/regulatory-fund-documents | |
| Class C | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Western Asset Corporate Bond Fund | |
| Class Name | Class C | |
| Trading Symbol | LWBOX | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Western Asset Corporate Bond Fund for the period January 1, 2024, to June 30, 2024. | |
| Shareholder Report Annual or Semi-Annual | semi-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 . | |
| 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 SIX MONTHS? (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 $77 1.55% | [4],[5] |
| Expenses Paid, Amount | $ 77 | |
| Expense Ratio, Percent | 1.55% | |
| Net Assets | $ 1,004,637,926 | |
| Holdings Count | $ / shares | 740 | [6] |
| Investment Company Portfolio Turnover | 51% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (as of June 30, 2024) Total Net Assets $1,004,637,926 Total Number of Portfolio Holdings * 740 Portfolio Turnover Rate 51% | [6] |
| Holdings [Text Block] | ||
| Updated Prospectus Web Address | https://www.franklintempleton.com/regulatory-fund-documents | |
| Class C1 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Western Asset Corporate Bond Fund | |
| Class Name | Class C1 | |
| Trading Symbol | SBILX | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Western Asset Corporate Bond Fund for the period January 1, 2024, to June 30, 2024. | |
| Shareholder Report Annual or Semi-Annual | semi-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 . | |
| 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 SIX MONTHS? (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 C1 $69 1.40% | [7],[8] |
| Expenses Paid, Amount | $ 69 | |
| Expense Ratio, Percent | 1.40% | |
| Net Assets | $ 1,004,637,926 | |
| Holdings Count | $ / shares | 740 | [9] |
| Investment Company Portfolio Turnover | 51% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (as of June 30, 2024) Total Net Assets $1,004,637,926 Total Number of Portfolio Holdings * 740 Portfolio Turnover Rate 51% | [9] |
| Holdings [Text Block] | ||
| Updated Prospectus Web Address | https://www.franklintempleton.com/regulatory-fund-documents | |
| Class I | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Western Asset Corporate Bond Fund | |
| Class Name | Class I | |
| Trading Symbol | SIGYX | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Western Asset Corporate Bond Fund for the period January 1, 2024, to June 30, 2024. | |
| Shareholder Report Annual or Semi-Annual | semi-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 . | |
| 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 SIX MONTHS? (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 $27 0.55% | [10],[11] |
| Expenses Paid, Amount | $ 27 | |
| Expense Ratio, Percent | 0.55% | |
| Net Assets | $ 1,004,637,926 | |
| Holdings Count | $ / shares | 740 | [12] |
| Investment Company Portfolio Turnover | 51% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (as of June 30, 2024) Total Net Assets $1,004,637,926 Total Number of Portfolio Holdings * 740 Portfolio Turnover Rate 51% | [12] |
| Holdings [Text Block] | ||
| Updated Prospectus Web Address | https://www.franklintempleton.com/regulatory-fund-documents | |
| Class P | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Western Asset Corporate Bond Fund | |
| Class Name | Class P | |
| Trading Symbol | LCBPX | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Western Asset Corporate Bond Fund for the period January 1, 2024, to June 30, 2024. | |
| Shareholder Report Annual or Semi-Annual | semi-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 . | |
| 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 SIX MONTHS? (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 P $55 1.10% | [13],[14] |
| Expenses Paid, Amount | $ 55 | |
| Expense Ratio, Percent | 1.10% | |
| Net Assets | $ 1,004,637,926 | |
| Holdings Count | $ / shares | 740 | [15] |
| Investment Company Portfolio Turnover | 51% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (as of June 30, 2024) Total Net Assets $1,004,637,926 Total Number of Portfolio Holdings * 740 Portfolio Turnover Rate 51% | [15] |
| Holdings [Text Block] | ||
| Updated Prospectus Web Address | https://www.franklintempleton.com/regulatory-fund-documents | |
| [1] * Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher. † Annualized. * Does not include derivatives, except purchased options, if any. * Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher. † Annualized. * Does not include derivatives, except purchased options, if any. * Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher. † Annualized. * Does not include derivatives, except purchased options, if any. * Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher. † Annualized. * Does not include derivatives, except purchased options, if any. * Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher. † Annualized. * Does not include derivatives, except purchased options, if any. | ||
| Shareholder Report, Holdings (Details) | Jun. 30, 2024 |
| Class A | Financials [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 23.70% |
| Class A | Energy [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15.10% |
| Class A | Consumer Discretionary [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.40% |
| Class A | Utilities [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8% |
| Class A | Industrials [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.30% |
| Class A | Health Care [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.50% |
| Class A | Communication Services [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.30% |
| Class A | Sovereign Bonds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.10% |
| Class A | Asset-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.80% |
| Class A | Information Technology [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.60% |
| Class A | Materials [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.40% |
| Class A | Consumer Staples [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.40% |
| Class A | Collateralized Mortgage Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.20% |
| Class A | U.S. Government & Agency Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2% |
| Class A | Real Estate [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.90% |
| Class A | Municipal Bonds [Members] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.80% |
| Class A | Mortgage-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.60% |
| Class A | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.90% |
| Class C | Financials [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 23.70% |
| Class C | Energy [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15.10% |
| Class C | Consumer Discretionary [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.40% |
| Class C | Utilities [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8% |
| Class C | Industrials [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.30% |
| Class C | Health Care [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.50% |
| Class C | Communication Services [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.30% |
| Class C | Sovereign Bonds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.10% |
| Class C | Asset-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.80% |
| Class C | Information Technology [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.60% |
| Class C | Materials [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.40% |
| Class C | Consumer Staples [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.40% |
| Class C | Collateralized Mortgage Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.20% |
| Class C | U.S. Government & Agency Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2% |
| Class C | Real Estate [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.90% |
| Class C | Municipal Bonds [Members] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.80% |
| Class C | Mortgage-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.60% |
| Class C | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.90% |
| Class C1 | Financials [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 23.70% |
| Class C1 | Energy [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15.10% |
| Class C1 | Consumer Discretionary [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.40% |
| Class C1 | Utilities [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8% |
| Class C1 | Industrials [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.30% |
| Class C1 | Health Care [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.50% |
| Class C1 | Communication Services [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.30% |
| Class C1 | Sovereign Bonds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.10% |
| Class C1 | Asset-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.80% |
| Class C1 | Information Technology [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.60% |
| Class C1 | Materials [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.40% |
| Class C1 | Consumer Staples [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.40% |
| Class C1 | Collateralized Mortgage Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.20% |
| Class C1 | U.S. Government & Agency Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2% |
| Class C1 | Real Estate [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.90% |
| Class C1 | Municipal Bonds [Members] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.80% |
| Class C1 | Mortgage-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.60% |
| Class C1 | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.90% |
| Class I | Financials [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 23.70% |
| Class I | Energy [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15.10% |
| Class I | Consumer Discretionary [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.40% |
| Class I | Utilities [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8% |
| Class I | Industrials [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.30% |
| Class I | Health Care [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.50% |
| Class I | Communication Services [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.30% |
| Class I | Sovereign Bonds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.10% |
| Class I | Asset-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.80% |
| Class I | Information Technology [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.60% |
| Class I | Materials [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.40% |
| Class I | Consumer Staples [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.40% |
| Class I | Collateralized Mortgage Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.20% |
| Class I | U.S. Government & Agency Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2% |
| Class I | Real Estate [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.90% |
| Class I | Municipal Bonds [Members] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.80% |
| Class I | Mortgage-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.60% |
| Class I | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.90% |
| Class P | Financials [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 23.70% |
| Class P | Energy [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15.10% |
| Class P | Consumer Discretionary [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.40% |
| Class P | Utilities [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8% |
| Class P | Industrials [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.30% |
| Class P | Health Care [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.50% |
| Class P | Communication Services [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.30% |
| Class P | Sovereign Bonds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.10% |
| Class P | Asset-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.80% |
| Class P | Information Technology [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.60% |
| Class P | Materials [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.40% |
| Class P | Consumer Staples [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.40% |
| Class P | Collateralized Mortgage Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.20% |
| Class P | U.S. Government & Agency Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2% |
| Class P | Real Estate [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.90% |
| Class P | Municipal Bonds [Members] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.80% |
| Class P | Mortgage-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.60% |
| Class P | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.90% |
