| Shareholder Report | 12 Months Ended |
| Oct. 31, 2024 USD ($) Holding |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | RUSSELL INVESTMENT CO |
| Entity Central Index Key | 0000351601 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Oct. 31, 2024 |
| C000089840 | |
| Shareholder Report [Line Items] | |
| Fund Name | Opportunistic Credit Fund |
| Class Name | Class A |
| Trading Symbol | RGCAX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class A $107 1.00% |
| Expenses Paid, Amount | $ 107 |
| Expense Ratio, Percent | 1% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Following the rally at the end of 2023, interest rates steadily climbed in 2024, but cooling inflation and a weakening labor market gave central banks confidence to start cutting rates. However, rates volatility (as measured by the ICE BofA MOVE Index) stayed at elevated levels during the fiscal year and increased in October in anticipation of the U.S. general election. Corporate bonds and securitized credit were top performers over the fiscal year as “all-in” yield buyers brought strong demand and drove credit spreads to decade-tight levels. The Fund performed in line with its secondary benchmark for the fiscal year. Positioning in emerging markets and an overweight to securitized credit were strong contributors, while an underweight to corporate bonds in favor of securitized credit dragged on performance as credit spreads narrowed during the fiscal year. An overweight to duration and yield curve positioning, both implemented via derivatives, detracted as interest rates increased during the beginning of 2024. Additionally, derivatives were used to maintain a steepening bias in the Fund, which benefitted from the rates curve steepening towards the end of the fiscal year. The Fund also used government bond futures to actively seek to generate returns through international rates positioning, currency forwards to seek to generate active returns through currency positioning and credit default swaps to adjust credit risk and these strategies had a positive impact during the fiscal year. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B24"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class A Bloomberg U.S. Universal Index Opportunistic Credit Linked Benchmark Footnote Reference 2014 9,624 10,000 10,000 2015 9,302 10,167 9,978 2016 10,214 10,682 11,081 2017 10,961 10,870 11,988 2018 10,741 10,658 11,792 2019 11,563 11,869 12,890 2020 11,459 12,576 13,200 2021 12,450 12,636 14,022 2022 10,656 10,641 12,260 2023 11,363 10,768 13,083 2024 12,975 11,974 14,940 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class A - with sales charge 9.87% 1.55% 2.64% Class A - no sales charge 14.19% 2.33% 3.03% Bloomberg U.S. Universal Index 11.20% 0.18% 1.82% Opportunistic Credit Linked Benchmark Footnote Reference 14.20% 3.00% 4.10% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 458,934,000 |
| Holdings Count | Holding | 1,292 |
| Advisory Fees Paid, Amount | $ 3,131,000 |
| InvestmentCompanyPortfolioTurnover | 67% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $458,934 Total Number of Portfolio Holdings 1,292 Total Advisory Fees Paid (thousands) $3,131 Portfolio Turnover Rate 67% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 3.8% Common Stocks 1.6% Short-Term Investments 11.3% Long-Term Fixed Income Investments 83.3% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 1.00% to (i) 0.58% on the first $1 billion; (ii) 0.54% on the next $2 billion; (iii) 0.51% on the next $3 billion; and (iv) 0.49% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a fee waiver that resulted in an effective advisory fee not to exceed 0.511%. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective advisory fee not to exceed 0.493%. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 1.00% to (i) 0.58% on the first $1 billion; (ii) 0.54% on the next $2 billion; (iii) 0.51% on the next $3 billion; and (iv) 0.49% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a fee waiver that resulted in an effective advisory fee not to exceed 0.511%. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective advisory fee not to exceed 0.493%. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000089841 | |
| Shareholder Report [Line Items] | |
| Fund Name | Opportunistic Credit Fund |
| Class Name | Class C |
| Trading Symbol | RGCCX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class C $187 1.75% |
| Expenses Paid, Amount | $ 187 |
| Expense Ratio, Percent | 1.75% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Following the rally at the end of 2023, interest rates steadily climbed in 2024, but cooling inflation and a weakening labor market gave central banks confidence to start cutting rates. However, rates volatility (as measured by the ICE BofA MOVE Index) stayed at elevated levels during the fiscal year and increased in October in anticipation of the U.S. general election. Corporate bonds and securitized credit were top performers over the fiscal year as “all-in” yield buyers brought strong demand and drove credit spreads to decade-tight levels. The Fund performed in line with its secondary benchmark for the fiscal year. Positioning in emerging markets and an overweight to securitized credit were strong contributors, while an underweight to corporate bonds in favor of securitized credit dragged on performance as credit spreads narrowed during the fiscal year. An overweight to duration and yield curve positioning, both implemented via derivatives, detracted as interest rates increased during the beginning of 2024. Additionally, derivatives were used to maintain a steepening bias in the Fund, which benefitted from the rates curve steepening towards the end of the fiscal year. The Fund also used government bond futures to actively seek to generate returns through international rates positioning, currency forwards to seek to generate active returns through currency positioning and credit default swaps to adjust credit risk and these strategies had a positive impact during the fiscal year. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B54"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class C Bloomberg U.S. Universal Index Opportunistic Credit Linked Benchmark Footnote Reference 2014 10,000 10,000 10,000 2015 9,586 10,167 9,978 2016 10,452 10,682 11,081 2017 11,138 10,870 11,988 2018 10,833 10,658 11,792 2019 11,569 11,869 12,890 2020 11,390 12,576 13,200 2021 12,271 12,636 14,022 2022 10,420 10,641 12,260 2023 11,033 10,768 13,083 2024 12,493 11,974 14,940 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class C 13.24% 1.55% 2.25% Bloomberg U.S. Universal Index 11.20% 0.18% 1.82% Opportunistic Credit Linked Benchmark Footnote Reference 14.20% 3.00% 4.10% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 458,934,000 |
| Holdings Count | Holding | 1,292 |
| Advisory Fees Paid, Amount | $ 3,131,000 |
| InvestmentCompanyPortfolioTurnover | 67% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $458,934 Total Number of Portfolio Holdings 1,292 Total Advisory Fees Paid (thousands) $3,131 Portfolio Turnover Rate 67% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 3.8% Common Stocks 1.6% Short-Term Investments 11.3% Long-Term Fixed Income Investments 83.3% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 1.00% to (i) 0.58% on the first $1 billion; (ii) 0.54% on the next $2 billion; (iii) 0.51% on the next $3 billion; and (iv) 0.49% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a fee waiver that resulted in an effective advisory fee not to exceed 0.511%. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective advisory fee not to exceed 0.493%. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 1.00% to (i) 0.58% on the first $1 billion; (ii) 0.54% on the next $2 billion; (iii) 0.51% on the next $3 billion; and (iv) 0.49% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a fee waiver that resulted in an effective advisory fee not to exceed 0.511%. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective advisory fee not to exceed 0.493%. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000178390 | |
| Shareholder Report [Line Items] | |
| Fund Name | Opportunistic Credit Fund |
| Class Name | Class M |
| Trading Symbol | RGOTX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class M $75 0.70% |
| Expenses Paid, Amount | $ 75 |
| Expense Ratio, Percent | 0.70% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Following the rally at the end of 2023, interest rates steadily climbed in 2024, but cooling inflation and a weakening labor market gave central banks confidence to start cutting rates. However, rates volatility (as measured by the ICE BofA MOVE Index) stayed at elevated levels during the fiscal year and increased in October in anticipation of the U.S. general election. Corporate bonds and securitized credit were top performers over the fiscal year as “all-in” yield buyers brought strong demand and drove credit spreads to decade-tight levels. The Fund performed in line with its secondary benchmark for the fiscal year. Positioning in emerging markets and an overweight to securitized credit were strong contributors, while an underweight to corporate bonds in favor of securitized credit dragged on performance as credit spreads narrowed during the fiscal year. An overweight to duration and yield curve positioning, both implemented via derivatives, detracted as interest rates increased during the beginning of 2024. Additionally, derivatives were used to maintain a steepening bias in the Fund, which benefitted from the rates curve steepening towards the end of the fiscal year. The Fund also used government bond futures to actively seek to generate returns through international rates positioning, currency forwards to seek to generate active returns through currency positioning and credit default swaps to adjust credit risk and these strategies had a positive impact during the fiscal year. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B84"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class M Footnote Reference Bloomberg U.S. Universal Index Opportunistic Credit Linked Benchmark Footnote Reference 2014 10,000 10,000 10,000 2015 9,689 10,167 9,978 2016 10,663 10,682 11,081 2017 11,482 10,870 11,988 2018 11,273 10,658 11,792 2019 12,182 11,869 12,890 2020 12,111 12,576 13,200 2021 13,190 12,636 14,022 2022 11,318 10,641 12,260 2023 12,104 10,768 13,083 2024 13,862 11,974 14,940 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class M Footnote Reference 14.53% 2.62% 3.32% Bloomberg U.S. Universal Index 11.20% 0.18% 1.82% Opportunistic Credit Linked Benchmark Footnote Reference 14.20% 3.00% 4.10% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 458,934,000 |
| Holdings Count | Holding | 1,292 |
| Advisory Fees Paid, Amount | $ 3,131,000 |
| InvestmentCompanyPortfolioTurnover | 67% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $458,934 Total Number of Portfolio Holdings 1,292 Total Advisory Fees Paid (thousands) $3,131 Portfolio Turnover Rate 67% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 3.8% Common Stocks 1.6% Short-Term Investments 11.3% Long-Term Fixed Income Investments 83.3% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 1.00% to (i) 0.58% on the first $1 billion; (ii) 0.54% on the next $2 billion; (iii) 0.51% on the next $3 billion; and (iv) 0.49% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a fee waiver that resulted in an effective advisory fee not to exceed 0.511%. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective advisory fee not to exceed 0.493%. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 1.00% to (i) 0.58% on the first $1 billion; (ii) 0.54% on the next $2 billion; (iii) 0.51% on the next $3 billion; and (iv) 0.49% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a fee waiver that resulted in an effective advisory fee not to exceed 0.511%. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective advisory fee not to exceed 0.493%. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000089843 | |
| Shareholder Report [Line Items] | |
| Fund Name | Opportunistic Credit Fund |
| Class Name | Class S |
| Trading Symbol | RGCSX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class S $80 0.75% |
| Expenses Paid, Amount | $ 80 |
| Expense Ratio, Percent | 0.75% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Following the rally at the end of 2023, interest rates steadily climbed in 2024, but cooling inflation and a weakening labor market gave central banks confidence to start cutting rates. However, rates volatility (as measured by the ICE BofA MOVE Index) stayed at elevated levels during the fiscal year and increased in October in anticipation of the U.S. general election. Corporate bonds and securitized credit were top performers over the fiscal year as “all-in” yield buyers brought strong demand and drove credit spreads to decade-tight levels. The Fund performed in line with its secondary benchmark for the fiscal year. Positioning in emerging markets and an overweight to securitized credit were strong contributors, while an underweight to corporate bonds in favor of securitized credit dragged on performance as credit spreads narrowed during the fiscal year. An overweight to duration and yield curve positioning, both implemented via derivatives, detracted as interest rates increased during the beginning of 2024. Additionally, derivatives were used to maintain a steepening bias in the Fund, which benefitted from the rates curve steepening towards the end of the fiscal year. The Fund also used government bond futures to actively seek to generate returns through international rates positioning, currency forwards to seek to generate active returns through currency positioning and credit default swaps to adjust credit risk and these strategies had a positive impact during the fiscal year. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B114"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class S Bloomberg U.S. Universal Index Opportunistic Credit Linked Benchmark Footnote Reference 2014 10,000 10,000 10,000 2015 9,689 10,167 9,978 2016 10,663 10,682 11,081 2017 11,477 10,870 11,988 2018 11,275 10,658 11,792 2019 12,164 11,869 12,890 2020 12,101 12,576 13,200 2021 13,171 12,636 14,022 2022 11,299 10,641 12,260 2023 12,079 10,768 13,083 2024 13,826 11,974 14,940 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class S 14.46% 2.59% 3.29% Bloomberg U.S. Universal Index 11.20% 0.18% 1.82% Opportunistic Credit Linked Benchmark Footnote Reference 14.20% 3.00% 4.10% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 458,934,000 |
| Holdings Count | Holding | 1,292 |
| Advisory Fees Paid, Amount | $ 3,131,000 |
| InvestmentCompanyPortfolioTurnover | 67% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $458,934 Total Number of Portfolio Holdings 1,292 Total Advisory Fees Paid (thousands) $3,131 Portfolio Turnover Rate 67% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 3.8% Common Stocks 1.6% Short-Term Investments 11.3% Long-Term Fixed Income Investments 83.3% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 1.00% to (i) 0.58% on the first $1 billion; (ii) 0.54% on the next $2 billion; (iii) 0.51% on the next $3 billion; and (iv) 0.49% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a fee waiver that resulted in an effective advisory fee not to exceed 0.511%. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective advisory fee not to exceed 0.493%. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 1.00% to (i) 0.58% on the first $1 billion; (ii) 0.54% on the next $2 billion; (iii) 0.51% on the next $3 billion; and (iv) 0.49% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a fee waiver that resulted in an effective advisory fee not to exceed 0.511%. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective advisory fee not to exceed 0.493%. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000089839 | |
| Shareholder Report [Line Items] | |
| Fund Name | Opportunistic Credit Fund |
| Class Name | Class Y |
| Trading Symbol | RGCYX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class Y $72 0.67% |
| Expenses Paid, Amount | $ 72 |
| Expense Ratio, Percent | 0.67% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Following the rally at the end of 2023, interest rates steadily climbed in 2024, but cooling inflation and a weakening labor market gave central banks confidence to start cutting rates. However, rates volatility (as measured by the ICE BofA MOVE Index) stayed at elevated levels during the fiscal year and increased in October in anticipation of the U.S. general election. Corporate bonds and securitized credit were top performers over the fiscal year as “all-in” yield buyers brought strong demand and drove credit spreads to decade-tight levels. The Fund performed in line with its secondary benchmark for the fiscal year. Positioning in emerging markets and an overweight to securitized credit were strong contributors, while an underweight to corporate bonds in favor of securitized credit dragged on performance as credit spreads narrowed during the fiscal year. An overweight to duration and yield curve positioning, both implemented via derivatives, detracted as interest rates increased during the beginning of 2024. Additionally, derivatives were used to maintain a steepening bias in the Fund, which benefitted from the rates curve steepening towards the end of the fiscal year. The Fund also used government bond futures to actively seek to generate returns through international rates positioning, currency forwards to seek to generate active returns through currency positioning and credit default swaps to adjust credit risk and these strategies had a positive impact during the fiscal year. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B144"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class Y Bloomberg U.S. Universal Index Opportunistic Credit Linked Benchmark Footnote Reference 2014 10,000 10,000 10,000 2015 9,696 10,167 9,978 2016 10,678 10,682 11,081 2017 11,514 10,870 11,988 2018 11,296 10,658 11,792 2019 12,210 11,869 12,890 2020 12,142 12,576 13,200 2021 13,226 12,636 14,022 2022 11,352 10,641 12,260 2023 12,158 10,768 13,083 2024 13,925 11,974 14,940 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class Y 14.53% 2.66% 3.37% Bloomberg U.S. Universal Index 11.20% 0.18% 1.82% Opportunistic Credit Linked Benchmark Footnote Reference 14.20% 3.00% 4.10% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 458,934,000 |
| Holdings Count | Holding | 1,292 |
| Advisory Fees Paid, Amount | $ 3,131,000 |
| InvestmentCompanyPortfolioTurnover | 67% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $458,934 Total Number of Portfolio Holdings 1,292 Total Advisory Fees Paid (thousands) $3,131 Portfolio Turnover Rate 67% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 3.8% Common Stocks 1.6% Short-Term Investments 11.3% Long-Term Fixed Income Investments 83.3% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 1.00% to (i) 0.58% on the first $1 billion; (ii) 0.54% on the next $2 billion; (iii) 0.51% on the next $3 billion; and (iv) 0.49% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a fee waiver that resulted in an effective advisory fee not to exceed 0.511%. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective advisory fee not to exceed 0.493%. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 1.00% to (i) 0.58% on the first $1 billion; (ii) 0.54% on the next $2 billion; (iii) 0.51% on the next $3 billion; and (iv) 0.49% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a fee waiver that resulted in an effective advisory fee not to exceed 0.511%. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective advisory fee not to exceed 0.493%. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000192625 | |
| Shareholder Report [Line Items] | |
| Fund Name | Long Duration Bond Fund |
| Class Name | Class M |
| Trading Symbol | RMHTX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class M $39 0.37% |
| Expenses Paid, Amount | $ 39 |
| Expense Ratio, Percent | 0.37% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Following the rally at the end of 2023, interest rates steadily climbed in 2024, but cooling inflation and a weakening labor market gave central banks confidence to start cutting rates. However, rates volatility (as measured by the ICE BofA MOVE Index) stayed at elevated levels during the fiscal year and increased in October in anticipation of the U.S. general election. The Fund performed in line with its secondary benchmark for the fiscal year. The Fund’s duration and yield curve positioning, both implemented via derivatives, detracted from performance, with the Fund’s underweight to the 12- and 15-year key rate durations a main detractor to performance. Out-of-benchmark exposures to agency bonds and taxable municipals were the primary positive return drivers for the Fund over the fiscal year, as long-dated agency bonds outperformed their Treasury counterparts. The Fund also used government bond futures during the period to seek to generate active returns through international rates positioning, and this strategy detracted. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B174"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class M Footnote Reference Bloomberg U.S. Aggregate Bond Index Long Duration Bond Linked Benchmark Footnote Reference 11/13/2019 10,000 10,000 10,000 2020 10,577 10,692 10,504 2021 10,596 10,641 10,417 2022 9,125 8,972 9,154 2023 8,803 9,004 9,075 2024 9,842 9,954 10,145 |
| Average Annual Return [Table Text Block] | 1 Year Since Inception Class M Footnote Reference 11.80% (0.32)% Bloomberg U.S. Aggregate Bond Index 10.55% (0.09)% Long Duration Bond Linked Benchmark Footnote Reference 11.78% 0.29% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 280,872,000 |
| Holdings Count | Holding | 173 |
| Advisory Fees Paid, Amount | $ 396,000 |
| InvestmentCompanyPortfolioTurnover | 49% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $280,872 Total Number of Portfolio Holdings 173 Total Advisory Fees Paid (thousands) $396 Portfolio Turnover Rate 49% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 1.4% Short-Term Investments 4.2% Long-Term Investments 94.4% |
| Material Fund Change [Text Block] | Material Fund Changes Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.26% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.34%. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.26% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.34%. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000192624 | |
| Shareholder Report [Line Items] | |
| Fund Name | Long Duration Bond Fund |
| Class Name | Class S |
| Trading Symbol | RMHSX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class S $55 0.52% |
| Expenses Paid, Amount | $ 55 |
| Expense Ratio, Percent | 0.52% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Following the rally at the end of 2023, interest rates steadily climbed in 2024, but cooling inflation and a weakening labor market gave central banks confidence to start cutting rates. However, rates volatility (as measured by the ICE BofA MOVE Index) stayed at elevated levels during the fiscal year and increased in October in anticipation of the U.S. general election. The Fund performed in line with its secondary benchmark for the fiscal year. The Fund’s duration and yield curve positioning, both implemented via derivatives, detracted from performance, with the Fund’s underweight to the 12- and 15-year key rate durations a main detractor to performance. Out-of-benchmark exposures to agency bonds and taxable municipals were the primary positive return drivers for the Fund over the fiscal year, as long-dated agency bonds outperformed their Treasury counterparts. The Fund also used government bond futures during the period to seek to generate active returns through international rates positioning, and this strategy detracted. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B204"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class S Footnote Reference Bloomberg U.S. Aggregate Bond Index Long Duration Bond Linked Benchmark Footnote Reference 11/13/2019 10,000 10,000 10,000 2020 10,577 10,692 10,504 2021 10,596 10,641 10,417 2022 9,125 8,972 9,154 2023 8,803 9,004 9,075 2024 9,817 9,954 10,145 |
| Average Annual Return [Table Text Block] | 1 Year Since Inception Class S Footnote Reference 11.51% (0.37)% Bloomberg U.S. Aggregate Bond Index 10.55% (0.09)% Long Duration Bond Linked Benchmark Footnote Reference 11.78% 0.29% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 280,872,000 |
| Holdings Count | Holding | 173 |
| Advisory Fees Paid, Amount | $ 396,000 |
| InvestmentCompanyPortfolioTurnover | 49% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $280,872 Total Number of Portfolio Holdings 173 Total Advisory Fees Paid (thousands) $396 Portfolio Turnover Rate 49% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 1.4% Short-Term Investments 4.2% Long-Term Investments 94.4% |
| Material Fund Change [Text Block] | Material Fund Changes Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.26% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.34%. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.26% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.34%. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000192626 | |
| Shareholder Report [Line Items] | |
| Fund Name | Long Duration Bond Fund |
| Class Name | Class Y |
| Trading Symbol | RMHYX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class Y $34 0.32% |
| Expenses Paid, Amount | $ 34 |
| Expense Ratio, Percent | 0.32% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Following the rally at the end of 2023, interest rates steadily climbed in 2024, but cooling inflation and a weakening labor market gave central banks confidence to start cutting rates. However, rates volatility (as measured by the ICE BofA MOVE Index) stayed at elevated levels during the fiscal year and increased in October in anticipation of the U.S. general election. The Fund performed in line with its secondary benchmark for the fiscal year. The Fund’s duration and yield curve positioning, both implemented via derivatives, detracted from performance, with the Fund’s underweight to the 12- and 15-year key rate durations a main detractor to performance. Out-of-benchmark exposures to agency bonds and taxable municipals were the primary positive return drivers for the Fund over the fiscal year, as long-dated agency bonds outperformed their Treasury counterparts. The Fund also used government bond futures during the period to seek to generate active returns through international rates positioning, and this strategy detracted. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B234"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class Y Bloomberg U.S. Aggregate Bond Index Long Duration Bond Linked Benchmark Footnote Reference 11/13/2019 10,000 10,000 10,000 2020 10,577 10,692 10,504 2021 10,596 10,641 10,417 2022 9,125 8,972 9,154 2023 8,803 9,004 9,075 2024 9,846 9,954 10,145 |
| Average Annual Return [Table Text Block] | 1 Year Since Inception Class Y 11.84% (0.31)% Bloomberg U.S. Aggregate Bond Index 10.55% (0.09)% Long Duration Bond Linked Benchmark Footnote Reference 11.78% 0.29% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 280,872,000 |
| Holdings Count | Holding | 173 |
| Advisory Fees Paid, Amount | $ 396,000 |
| InvestmentCompanyPortfolioTurnover | 49% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $280,872 Total Number of Portfolio Holdings 173 Total Advisory Fees Paid (thousands) $396 Portfolio Turnover Rate 49% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 1.4% Short-Term Investments 4.2% Long-Term Investments 94.4% |
| Material Fund Change [Text Block] | Material Fund Changes Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.26% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.34%. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.26% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.34%. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000066911 | |
| Shareholder Report [Line Items] | |
| Fund Name | Strategic Bond Fund |
| Class Name | Class A |
| Trading Symbol | RFDAX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class A $88 0.84% |
| Expenses Paid, Amount | $ 88 |
| Expense Ratio, Percent | 0.84% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Following the rally at the end of 2023, interest rates steadily climbed in 2024, but cooling inflation and a weakening labor market gave central banks confidence to start cutting rates. However, rates volatility (as measured by the ICE BofA MOVE Index) stayed at elevated levels during the fiscal year and increased in October in anticipation of the U.S. general election. Corporate bonds and securitized credit were top performers over the fiscal year as “all-in” yield buyers brought strong demand and drove credit spreads to decade-tight levels. The Fund outperformed its primary benchmark for the fiscal year. The Fund’s overweight duration position and yield curve positioning, both implemented via derivatives, detracted from performance as interest rates increased during the beginning of 2024, but this was partially offset as rates rallied at the end of 2023 and during the last month of the fiscal year. Sector allocation was additive to performance, as overweights to high yield corporates, commercial mortgaged-backed securities and emerging market debt benefited from a spread tightening environment. During the period, the Fund used derivatives to maintain a steepening bias in the Fund, which benefitted from the rates curve steepening towards the end of the fiscal year. The Fund also used government bond futures to seek to generate active returns through international rates positioning and currency forwards to seek to generate active returns through currency positioning and these strategies had a positive impact during the fiscal year. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B264"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class A Bloomberg U.S. Aggregate Bond Index 2014 9,624 10,000 2015 9,775 10,196 2016 10,235 10,641 2017 10,298 10,737 2018 9,980 10,517 2019 11,163 11,727 2020 11,821 12,453 2021 11,860 12,393 2022 9,842 10,450 2023 9,760 10,487 2024 10,713 11,593 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class A - with sales charge 5.63% (1.58)% 0.69% Class A - no sales charge 9.76% (0.82)% 1.08% Bloomberg U.S. Aggregate Bond Index 10.55% (0.23)% 1.49% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 2,087,942,000 |
| Holdings Count | Holding | 993 |
| Advisory Fees Paid, Amount | $ 9,082,000 |
| InvestmentCompanyPortfolioTurnover | 91% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $2,087,942 Total Number of Portfolio Holdings 993 Total Advisory Fees Paid (thousands) $9,082 Portfolio Turnover Rate 91% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other (4.6)% Short-Term Investments 25.1% Long-Term Investments 79.5% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.50% to (i) 0.40% on the first $1 billion; (ii) 0.36% on the next $2 billion; (iii) 0.33% on the next $3 billion; and (iv) 0.31% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.43% on an annual basis. From March 1, 2024 until May 31, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.34%. Effective June 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.33%. In October 2024, RIM terminated Western Asset Management Company and Western Asset Management Company Limited as a money manager for the Fund and hired Allspring Global Investments, LLC as a money manager for the Fund. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.50% to (i) 0.40% on the first $1 billion; (ii) 0.36% on the next $2 billion; (iii) 0.33% on the next $3 billion; and (iv) 0.31% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.43% on an annual basis. From March 1, 2024 until May 31, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.34%. Effective June 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.33%. |
| Material Fund Change Adviser [Text Block] | In October 2024, RIM terminated Western Asset Management Company and Western Asset Management Company Limited as a money manager for the Fund and hired Allspring Global Investments, LLC as a money manager for the Fund. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000066912 | |
| Shareholder Report [Line Items] | |
| Fund Name | Strategic Bond Fund |
| Class Name | Class C |
| Trading Symbol | RFCCX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class C $166 1.59% |
| Expenses Paid, Amount | $ 166 |
| Expense Ratio, Percent | 1.59% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Following the rally at the end of 2023, interest rates steadily climbed in 2024, but cooling inflation and a weakening labor market gave central banks confidence to start cutting rates. However, rates volatility (as measured by the ICE BofA MOVE Index) stayed at elevated levels during the fiscal year and increased in October in anticipation of the U.S. general election. Corporate bonds and securitized credit were top performers over the fiscal year as “all-in” yield buyers brought strong demand and drove credit spreads to decade-tight levels. The Fund outperformed its primary benchmark for the fiscal year. The Fund’s overweight duration position and yield curve positioning, both implemented via derivatives, detracted from performance as interest rates increased during the beginning of 2024, but this was partially offset as rates rallied at the end of 2023 and during the last month of the fiscal year. Sector allocation was additive to performance, as overweights to high yield corporates, commercial mortgaged-backed securities and emerging market debt benefited from a spread tightening environment. During the period, the Fund used derivatives to maintain a steepening bias in the Fund, which benefitted from the rates curve steepening towards the end of the fiscal year. The Fund also used government bond futures to seek to generate active returns through international rates positioning and currency forwards to seek to generate active returns through currency positioning and these strategies had a positive impact during the fiscal year. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B295"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class C Bloomberg U.S. Aggregate Bond Index 2014 10,000 10,000 2015 10,078 10,196 2016 10,482 10,641 2017 10,462 10,737 2018 10,063 10,517 2019 11,177 11,727 2020 11,738 12,453 2021 11,700 12,393 2022 9,629 10,450 2023 9,483 10,487 2024 10,334 11,593 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class C 8.97% (1.56)% 0.33% Bloomberg U.S. Aggregate Bond Index 10.55% (0.23)% 1.49% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 2,087,942,000 |
| Holdings Count | Holding | 993 |
| Advisory Fees Paid, Amount | $ 9,082,000 |
| InvestmentCompanyPortfolioTurnover | 91% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $2,087,942 Total Number of Portfolio Holdings 993 Total Advisory Fees Paid (thousands) $9,082 Portfolio Turnover Rate 91% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other (4.6)% Short-Term Investments 25.1% Long-Term Investments 79.5% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.50% to (i) 0.40% on the first $1 billion; (ii) 0.36% on the next $2 billion; (iii) 0.33% on the next $3 billion; and (iv) 0.31% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.43% on an annual basis. From March 1, 2024 until May 31, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.34%. Effective June 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.33%. In October 2024, RIM terminated Western Asset Management Company and Western Asset Management Company Limited as a money manager for the Fund and hired Allspring Global Investments, LLC as a money manager for the Fund. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.50% to (i) 0.40% on the first $1 billion; (ii) 0.36% on the next $2 billion; (iii) 0.33% on the next $3 billion; and (iv) 0.31% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.43% on an annual basis. From March 1, 2024 until May 31, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.34%. Effective June 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.33%. |
| Material Fund Change Adviser [Text Block] | In October 2024, RIM terminated Western Asset Management Company and Western Asset Management Company Limited as a money manager for the Fund and hired Allspring Global Investments, LLC as a money manager for the Fund. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000178355 | |
| Shareholder Report [Line Items] | |
| Fund Name | Strategic Bond Fund |
| Class Name | Class M |
| Trading Symbol | RSYTX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class M $49 0.47% |
| Expenses Paid, Amount | $ 49 |
| Expense Ratio, Percent | 0.47% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Following the rally at the end of 2023, interest rates steadily climbed in 2024, but cooling inflation and a weakening labor market gave central banks confidence to start cutting rates. However, rates volatility (as measured by the ICE BofA MOVE Index) stayed at elevated levels during the fiscal year and increased in October in anticipation of the U.S. general election. Corporate bonds and securitized credit were top performers over the fiscal year as “all-in” yield buyers brought strong demand and drove credit spreads to decade-tight levels. The Fund outperformed its primary benchmark for the fiscal year. The Fund’s overweight duration position and yield curve positioning, both implemented via derivatives, detracted from performance as interest rates increased during the beginning of 2024, but this was partially offset as rates rallied at the end of 2023 and during the last month of the fiscal year. Sector allocation was additive to performance, as overweights to high yield corporates, commercial mortgaged-backed securities and emerging market debt benefited from a spread tightening environment. During the period, the Fund used derivatives to maintain a steepening bias in the Fund, which benefitted from the rates curve steepening towards the end of the fiscal year. The Fund also used government bond futures to seek to generate active returns through international rates positioning and currency forwards to seek to generate active returns through currency positioning and these strategies had a positive impact during the fiscal year. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B326"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class M Footnote Reference Bloomberg U.S. Aggregate Bond Index 2014 10,000 10,000 2015 10,182 10,196 2016 10,696 10,641 2017 10,793 10,737 2018 10,490 10,517 2019 11,773 11,727 2020 12,521 12,453 2021 12,613 12,393 2022 10,496 10,450 2023 10,448 10,487 2024 11,514 11,593 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class M Footnote Reference 10.20% (0.44)% 1.42% Bloomberg U.S. Aggregate Bond Index 10.55% (0.23)% 1.49% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 2,087,942,000 |
| Holdings Count | Holding | 993 |
| Advisory Fees Paid, Amount | $ 9,082,000 |
| InvestmentCompanyPortfolioTurnover | 91% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $2,087,942 Total Number of Portfolio Holdings 993 Total Advisory Fees Paid (thousands) $9,082 Portfolio Turnover Rate 91% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other (4.6)% Short-Term Investments 25.1% Long-Term Investments 79.5% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.50% to (i) 0.40% on the first $1 billion; (ii) 0.36% on the next $2 billion; (iii) 0.33% on the next $3 billion; and (iv) 0.31% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.43% on an annual basis. From March 1, 2024 until May 31, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.34%. Effective June 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.33%. In October 2024, RIM terminated Western Asset Management Company and Western Asset Management Company Limited as a money manager for the Fund and hired Allspring Global Investments, LLC as a money manager for the Fund. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.50% to (i) 0.40% on the first $1 billion; (ii) 0.36% on the next $2 billion; (iii) 0.33% on the next $3 billion; and (iv) 0.31% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.43% on an annual basis. From March 1, 2024 until May 31, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.34%. Effective June 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.33%. |
| Material Fund Change Adviser [Text Block] | In October 2024, RIM terminated Western Asset Management Company and Western Asset Management Company Limited as a money manager for the Fund and hired Allspring Global Investments, LLC as a money manager for the Fund. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000166202 | |
| Shareholder Report [Line Items] | |
| Fund Name | Strategic Bond Fund |
| Class Name | Class R6 |
| Trading Symbol | RSBRX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class R6 $48 0.46% |
| Expenses Paid, Amount | $ 48 |
| Expense Ratio, Percent | 0.46% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Following the rally at the end of 2023, interest rates steadily climbed in 2024, but cooling inflation and a weakening labor market gave central banks confidence to start cutting rates. However, rates volatility (as measured by the ICE BofA MOVE Index) stayed at elevated levels during the fiscal year and increased in October in anticipation of the U.S. general election. Corporate bonds and securitized credit were top performers over the fiscal year as “all-in” yield buyers brought strong demand and drove credit spreads to decade-tight levels. The Fund outperformed its primary benchmark for the fiscal year. The Fund’s overweight duration position and yield curve positioning, both implemented via derivatives, detracted from performance as interest rates increased during the beginning of 2024, but this was partially offset as rates rallied at the end of 2023 and during the last month of the fiscal year. Sector allocation was additive to performance, as overweights to high yield corporates, commercial mortgaged-backed securities and emerging market debt benefited from a spread tightening environment. During the period, the Fund used derivatives to maintain a steepening bias in the Fund, which benefitted from the rates curve steepening towards the end of the fiscal year. The Fund also used government bond futures to seek to generate active returns through international rates positioning and currency forwards to seek to generate active returns through currency positioning and these strategies had a positive impact during the fiscal year. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B357"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class R6 Footnote Reference Bloomberg U.S. Aggregate Bond Index 2014 10,000 10,000 2015 10,200 10,196 2016 10,737 10,641 2017 10,841 10,737 2018 10,535 10,517 2019 11,828 11,727 2020 12,569 12,453 2021 12,663 12,393 2022 10,543 10,450 2023 10,496 10,487 2024 11,571 11,593 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class R6 Footnote Reference 10.24% (0.44)% 1.47% Bloomberg U.S. Aggregate Bond Index 10.55% (0.23)% 1.49% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 2,087,942,000 |
| Holdings Count | Holding | 993 |
| Advisory Fees Paid, Amount | $ 9,082,000 |
| InvestmentCompanyPortfolioTurnover | 91% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $2,087,942 Total Number of Portfolio Holdings 993 Total Advisory Fees Paid (thousands) $9,082 Portfolio Turnover Rate 91% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other (4.6)% Short-Term Investments 25.1% Long-Term Investments 79.5% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.50% to (i) 0.40% on the first $1 billion; (ii) 0.36% on the next $2 billion; (iii) 0.33% on the next $3 billion; and (iv) 0.31% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.43% on an annual basis. From March 1, 2024 until May 31, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.34%. Effective June 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.33%. In October 2024, RIM terminated Western Asset Management Company and Western Asset Management Company Limited as a money manager for the Fund and hired Allspring Global Investments, LLC as a money manager for the Fund. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.50% to (i) 0.40% on the first $1 billion; (ii) 0.36% on the next $2 billion; (iii) 0.33% on the next $3 billion; and (iv) 0.31% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.43% on an annual basis. From March 1, 2024 until May 31, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.34%. Effective June 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.33%. |
| Material Fund Change Adviser [Text Block] | In October 2024, RIM terminated Western Asset Management Company and Western Asset Management Company Limited as a money manager for the Fund and hired Allspring Global Investments, LLC as a money manager for the Fund. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000066913 | |
| Shareholder Report [Line Items] | |
| Fund Name | Strategic Bond Fund |
| Class Name | Class S |
| Trading Symbol | RFCTX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class S $60 0.57% |
| Expenses Paid, Amount | $ 60 |
| Expense Ratio, Percent | 0.57% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Following the rally at the end of 2023, interest rates steadily climbed in 2024, but cooling inflation and a weakening labor market gave central banks confidence to start cutting rates. However, rates volatility (as measured by the ICE BofA MOVE Index) stayed at elevated levels during the fiscal year and increased in October in anticipation of the U.S. general election. Corporate bonds and securitized credit were top performers over the fiscal year as “all-in” yield buyers brought strong demand and drove credit spreads to decade-tight levels. The Fund outperformed its primary benchmark for the fiscal year. The Fund’s overweight duration position and yield curve positioning, both implemented via derivatives, detracted from performance as interest rates increased during the beginning of 2024, but this was partially offset as rates rallied at the end of 2023 and during the last month of the fiscal year. Sector allocation was additive to performance, as overweights to high yield corporates, commercial mortgaged-backed securities and emerging market debt benefited from a spread tightening environment. During the period, the Fund used derivatives to maintain a steepening bias in the Fund, which benefitted from the rates curve steepening towards the end of the fiscal year. The Fund also used government bond futures to seek to generate active returns through international rates positioning and currency forwards to seek to generate active returns through currency positioning and these strategies had a positive impact during the fiscal year. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B388"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class S Bloomberg U.S. Aggregate Bond Index 2014 10,000 10,000 2015 10,182 10,196 2016 10,696 10,641 2017 10,780 10,737 2018 10,486 10,517 2019 11,765 11,727 2020 12,489 12,453 2021 12,569 12,393 2022 10,461 10,450 2023 10,398 10,487 2024 11,447 11,593 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class S 10.09% (0.55)% 1.36% Bloomberg U.S. Aggregate Bond Index 10.55% (0.23)% 1.49% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 2,087,942,000 |
| Holdings Count | Holding | 993 |
| Advisory Fees Paid, Amount | $ 9,082,000 |
| InvestmentCompanyPortfolioTurnover | 91% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $2,087,942 Total Number of Portfolio Holdings 993 Total Advisory Fees Paid (thousands) $9,082 Portfolio Turnover Rate 91% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other (4.6)% Short-Term Investments 25.1% Long-Term Investments 79.5% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.50% to (i) 0.40% on the first $1 billion; (ii) 0.36% on the next $2 billion; (iii) 0.33% on the next $3 billion; and (iv) 0.31% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.43% on an annual basis. From March 1, 2024 until May 31, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.34%. Effective June 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.33%. In October 2024, RIM terminated Western Asset Management Company and Western Asset Management Company Limited as a money manager for the Fund and hired Allspring Global Investments, LLC as a money manager for the Fund. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.50% to (i) 0.40% on the first $1 billion; (ii) 0.36% on the next $2 billion; (iii) 0.33% on the next $3 billion; and (iv) 0.31% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.43% on an annual basis. From March 1, 2024 until May 31, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.34%. Effective June 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.33%. |
| Material Fund Change Adviser [Text Block] | In October 2024, RIM terminated Western Asset Management Company and Western Asset Management Company Limited as a money manager for the Fund and hired Allspring Global Investments, LLC as a money manager for the Fund. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000004307 | |
| Shareholder Report [Line Items] | |
| Fund Name | Strategic Bond Fund |
| Class Name | Class Y |
| Trading Symbol | RFCYX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class Y $45 0.43% |
| Expenses Paid, Amount | $ 45 |
| Expense Ratio, Percent | 0.43% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Following the rally at the end of 2023, interest rates steadily climbed in 2024, but cooling inflation and a weakening labor market gave central banks confidence to start cutting rates. However, rates volatility (as measured by the ICE BofA MOVE Index) stayed at elevated levels during the fiscal year and increased in October in anticipation of the U.S. general election. Corporate bonds and securitized credit were top performers over the fiscal year as “all-in” yield buyers brought strong demand and drove credit spreads to decade-tight levels. The Fund outperformed its primary benchmark for the fiscal year. The Fund’s overweight duration position and yield curve positioning, both implemented via derivatives, detracted from performance as interest rates increased during the beginning of 2024, but this was partially offset as rates rallied at the end of 2023 and during the last month of the fiscal year. Sector allocation was additive to performance, as overweights to high yield corporates, commercial mortgaged-backed securities and emerging market debt benefited from a spread tightening environment. During the period, the Fund used derivatives to maintain a steepening bias in the Fund, which benefitted from the rates curve steepening towards the end of the fiscal year. The Fund also used government bond futures to seek to generate active returns through international rates positioning and currency forwards to seek to generate active returns through currency positioning and these strategies had a positive impact during the fiscal year. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B419"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class Y Bloomberg U.S. Aggregate Bond Index 2014 10,000 10,000 2015 10,200 10,196 2016 10,729 10,641 2017 10,845 10,737 2018 10,540 10,517 2019 11,840 11,727 2020 12,586 12,453 2021 12,684 12,393 2022 10,571 10,450 2023 10,525 10,487 2024 11,595 11,593 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class Y 10.17% (0.42)% 1.49% Bloomberg U.S. Aggregate Bond Index 10.55% (0.23)% 1.49% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 2,087,942,000 |
| Holdings Count | Holding | 993 |
| Advisory Fees Paid, Amount | $ 9,082,000 |
| InvestmentCompanyPortfolioTurnover | 91% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $2,087,942 Total Number of Portfolio Holdings 993 Total Advisory Fees Paid (thousands) $9,082 Portfolio Turnover Rate 91% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other (4.6)% Short-Term Investments 25.1% Long-Term Investments 79.5% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.50% to (i) 0.40% on the first $1 billion; (ii) 0.36% on the next $2 billion; (iii) 0.33% on the next $3 billion; and (iv) 0.31% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.43% on an annual basis. From March 1, 2024 until May 31, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.34%. Effective June 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.33%. In October 2024, RIM terminated Western Asset Management Company and Western Asset Management Company Limited as a money manager for the Fund and hired Allspring Global Investments, LLC as a money manager for the Fund. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.50% to (i) 0.40% on the first $1 billion; (ii) 0.36% on the next $2 billion; (iii) 0.33% on the next $3 billion; and (iv) 0.31% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.43% on an annual basis. From March 1, 2024 until May 31, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.34%. Effective June 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.33%. |
| Material Fund Change Adviser [Text Block] | In October 2024, RIM terminated Western Asset Management Company and Western Asset Management Company Limited as a money manager for the Fund and hired Allspring Global Investments, LLC as a money manager for the Fund. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000089691 | |
| Shareholder Report [Line Items] | |
| Fund Name | Investment Grade Bond Fund |
| Class Name | Class A |
| Trading Symbol | RFAAX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class A $82 0.78% |
| Expenses Paid, Amount | $ 82 |
| Expense Ratio, Percent | 0.78% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Following the rally at the end of 2023, interest rates steadily climbed in 2024, but cooling inflation and a weakening labor market gave central banks confidence to start cutting rates. However, rates volatility (as measured by the ICE BofA MOVE Index) stayed at elevated levels during the fiscal year and increased in October in anticipation of the U.S. general election. Corporate bonds and securitized credit were top performers over the fiscal year as “all-in” yield buyers brought strong demand and drove credit spreads to decade-tight levels. The Fund outperformed its primary benchmark for the fiscal year. The Fund’s overweight duration position and yield curve positioning, both implemented via derivatives, detracted from performance as interest rates increased during the beginning of 2024, but this was partially offset as rates rallied at the end of 2023 and during the last month of the fiscal year. Sector allocation was additive to performance, as overweights to investment grade and high yield corporates and commercial mortgaged-backed securities benefited from a spread tightening environment. The Fund used government bond futures to seek to generate active returns through international rates positioning and currency forwards to seek to generate active returns through currency positioning and these strategies had mixed results during the fiscal year. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B450"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class A Bloomberg U.S. Aggregate Bond Index 2014 9,623 10,000 2015 9,790 10,196 2016 10,227 10,641 2017 10,247 10,737 2018 9,938 10,517 2019 11,062 11,727 2020 11,757 12,453 2021 11,795 12,393 2022 9,771 10,450 2023 9,696 10,487 2024 10,669 11,593 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class A - with sales charge 5.93% (1.47)% 0.65% Class A - no sales charge 10.03% (0.72)% 1.04% Bloomberg U.S. Aggregate Bond Index 10.55% (0.23)% 1.49% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 1,059,484,000 |
| Holdings Count | Holding | 793 |
| Advisory Fees Paid, Amount | $ 2,747,000 |
| InvestmentCompanyPortfolioTurnover | 77% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $1,059,484 Total Number of Portfolio Holdings 793 Total Advisory Fees Paid (thousands) $2,747 Portfolio Turnover Rate 77% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other (10.3)% Short-Term Investments 17.4% Long-Term Investments 92.9% |
| Material Fund Change [Text Block] | Material Fund Changes Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.32% on an annual basis. Effective March 1, 2024, RIM contractually agreed to waive 0.01% of its advisory fee. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.32% on an annual basis. Effective March 1, 2024, RIM contractually agreed to waive 0.01% of its advisory fee. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000053055 | |
| Shareholder Report [Line Items] | |
| Fund Name | Investment Grade Bond Fund |
| Class Name | Class C |
| Trading Symbol | RFACX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class C $160 1.53% |
| Expenses Paid, Amount | $ 160 |
| Expense Ratio, Percent | 1.53% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Following the rally at the end of 2023, interest rates steadily climbed in 2024, but cooling inflation and a weakening labor market gave central banks confidence to start cutting rates. However, rates volatility (as measured by the ICE BofA MOVE Index) stayed at elevated levels during the fiscal year and increased in October in anticipation of the U.S. general election. Corporate bonds and securitized credit were top performers over the fiscal year as “all-in” yield buyers brought strong demand and drove credit spreads to decade-tight levels. The Fund outperformed its primary benchmark for the fiscal year. The Fund’s overweight duration position and yield curve positioning, both implemented via derivatives, detracted from performance as interest rates increased during the beginning of 2024, but this was partially offset as rates rallied at the end of 2023 and during the last month of the fiscal year. Sector allocation was additive to performance, as overweights to investment grade and high yield corporates and commercial mortgaged-backed securities benefited from a spread tightening environment. The Fund used government bond futures to seek to generate active returns through international rates positioning and currency forwards to seek to generate active returns through currency positioning and these strategies had mixed results during the fiscal year. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B480"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class C Bloomberg U.S. Aggregate Bond Index 2014 10,000 10,000 2015 10,099 10,196 2016 10,470 10,641 2017 10,407 10,737 2018 10,024 10,517 2019 11,072 11,727 2020 11,681 12,453 2021 11,633 12,393 2022 9,565 10,450 2023 9,422 10,487 2024 10,287 11,593 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class C 9.18% (1.46)% 0.28% Bloomberg U.S. Aggregate Bond Index 10.55% (0.23)% 1.49% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 1,059,484,000 |
| Holdings Count | Holding | 793 |
| Advisory Fees Paid, Amount | $ 2,747,000 |
| InvestmentCompanyPortfolioTurnover | 77% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $1,059,484 Total Number of Portfolio Holdings 793 Total Advisory Fees Paid (thousands) $2,747 Portfolio Turnover Rate 77% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other (10.3)% Short-Term Investments 17.4% Long-Term Investments 92.9% |
| Material Fund Change [Text Block] | Material Fund Changes Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.32% on an annual basis. Effective March 1, 2024, RIM contractually agreed to waive 0.01% of its advisory fee. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.32% on an annual basis. Effective March 1, 2024, RIM contractually agreed to waive 0.01% of its advisory fee. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000178345 | |
| Shareholder Report [Line Items] | |
| Fund Name | Investment Grade Bond Fund |
| Class Name | Class M |
| Trading Symbol | RIWTX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class M $41 0.39% |
| Expenses Paid, Amount | $ 41 |
| Expense Ratio, Percent | 0.39% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Following the rally at the end of 2023, interest rates steadily climbed in 2024, but cooling inflation and a weakening labor market gave central banks confidence to start cutting rates. However, rates volatility (as measured by the ICE BofA MOVE Index) stayed at elevated levels during the fiscal year and increased in October in anticipation of the U.S. general election. Corporate bonds and securitized credit were top performers over the fiscal year as “all-in” yield buyers brought strong demand and drove credit spreads to decade-tight levels. The Fund outperformed its primary benchmark for the fiscal year. The Fund’s overweight duration position and yield curve positioning, both implemented via derivatives, detracted from performance as interest rates increased during the beginning of 2024, but this was partially offset as rates rallied at the end of 2023 and during the last month of the fiscal year. Sector allocation was additive to performance, as overweights to investment grade and high yield corporates and commercial mortgaged-backed securities benefited from a spread tightening environment. The Fund used government bond futures to seek to generate active returns through international rates positioning and currency forwards to seek to generate active returns through currency positioning and these strategies had mixed results during the fiscal year. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B510"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class M Footnote Reference Bloomberg U.S. Aggregate Bond Index 2014 10,000 10,000 2015 10,203 10,196 2016 10,680 10,641 2017 10,738 10,737 2018 10,459 10,517 2019 11,685 11,727 2020 12,468 12,453 2021 12,558 12,393 2022 10,443 10,450 2023 10,404 10,487 2024 11,491 11,593 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class M Footnote Reference 10.45% (0.33)% 1.40% Bloomberg U.S. Aggregate Bond Index 10.55% (0.23)% 1.49% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 1,059,484,000 |
| Holdings Count | Holding | 793 |
| Advisory Fees Paid, Amount | $ 2,747,000 |
| InvestmentCompanyPortfolioTurnover | 77% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $1,059,484 Total Number of Portfolio Holdings 793 Total Advisory Fees Paid (thousands) $2,747 Portfolio Turnover Rate 77% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other (10.3)% Short-Term Investments 17.4% Long-Term Investments 92.9% |
| Material Fund Change [Text Block] | Material Fund Changes Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.32% on an annual basis. Effective March 1, 2024, RIM contractually agreed to waive 0.01% of its advisory fee. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.32% on an annual basis. Effective March 1, 2024, RIM contractually agreed to waive 0.01% of its advisory fee. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000166200 | |
| Shareholder Report [Line Items] | |
| Fund Name | Investment Grade Bond Fund |
| Class Name | Class R6 |
| Trading Symbol | RIGRX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class R6 $38 0.36% |
| Expenses Paid, Amount | $ 38 |
| Expense Ratio, Percent | 0.36% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Following the rally at the end of 2023, interest rates steadily climbed in 2024, but cooling inflation and a weakening labor market gave central banks confidence to start cutting rates. However, rates volatility (as measured by the ICE BofA MOVE Index) stayed at elevated levels during the fiscal year and increased in October in anticipation of the U.S. general election. Corporate bonds and securitized credit were top performers over the fiscal year as “all-in” yield buyers brought strong demand and drove credit spreads to decade-tight levels. The Fund outperformed its primary benchmark for the fiscal year. The Fund’s overweight duration position and yield curve positioning, both implemented via derivatives, detracted from performance as interest rates increased during the beginning of 2024, but this was partially offset as rates rallied at the end of 2023 and during the last month of the fiscal year. Sector allocation was additive to performance, as overweights to investment grade and high yield corporates and commercial mortgaged-backed securities benefited from a spread tightening environment. The Fund used government bond futures to seek to generate active returns through international rates positioning and currency forwards to seek to generate active returns through currency positioning and these strategies had mixed results during the fiscal year. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B540"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class R6 Footnote Reference Bloomberg U.S. Aggregate Bond Index 2014 10,000 10,000 2015 10,218 10,196 2016 10,722 10,641 2017 10,783 10,737 2018 10,507 10,517 2019 11,743 11,727 2020 12,535 12,453 2021 12,629 12,393 2022 10,507 10,450 2023 10,471 10,487 2024 11,570 11,593 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class R6 Footnote Reference 10.49% (0.30)% 1.47% Bloomberg U.S. Aggregate Bond Index 10.55% (0.23)% 1.49% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 1,059,484,000 |
| Holdings Count | Holding | 793 |
| Advisory Fees Paid, Amount | $ 2,747,000 |
| InvestmentCompanyPortfolioTurnover | 77% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $1,059,484 Total Number of Portfolio Holdings 793 Total Advisory Fees Paid (thousands) $2,747 Portfolio Turnover Rate 77% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other (10.3)% Short-Term Investments 17.4% Long-Term Investments 92.9% |
| Material Fund Change [Text Block] | Material Fund Changes Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.32% on an annual basis. Effective March 1, 2024, RIM contractually agreed to waive 0.01% of its advisory fee. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.32% on an annual basis. Effective March 1, 2024, RIM contractually agreed to waive 0.01% of its advisory fee. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000053056 | |
| Shareholder Report [Line Items] | |
| Fund Name | Investment Grade Bond Fund |
| Class Name | Class S |
| Trading Symbol | RFATX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class S $52 0.49% |
| Expenses Paid, Amount | $ 52 |
| Expense Ratio, Percent | 0.49% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Following the rally at the end of 2023, interest rates steadily climbed in 2024, but cooling inflation and a weakening labor market gave central banks confidence to start cutting rates. However, rates volatility (as measured by the ICE BofA MOVE Index) stayed at elevated levels during the fiscal year and increased in October in anticipation of the U.S. general election. Corporate bonds and securitized credit were top performers over the fiscal year as “all-in” yield buyers brought strong demand and drove credit spreads to decade-tight levels. The Fund outperformed its primary benchmark for the fiscal year. The Fund’s overweight duration position and yield curve positioning, both implemented via derivatives, detracted from performance as interest rates increased during the beginning of 2024, but this was partially offset as rates rallied at the end of 2023 and during the last month of the fiscal year. Sector allocation was additive to performance, as overweights to investment grade and high yield corporates and commercial mortgaged-backed securities benefited from a spread tightening environment. The Fund used government bond futures to seek to generate active returns through international rates positioning and currency forwards to seek to generate active returns through currency positioning and these strategies had mixed results during the fiscal year. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B570"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class S Bloomberg U.S. Aggregate Bond Index 2014 10,000 10,000 2015 10,203 10,196 2016 10,680 10,641 2017 10,731 10,737 2018 10,442 10,517 2019 11,654 11,727 2020 12,422 12,453 2021 12,499 12,393 2022 10,387 10,450 2023 10,332 10,487 2024 11,401 11,593 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class S 10.35% (0.44)% 1.32% Bloomberg U.S. Aggregate Bond Index 10.55% (0.23)% 1.49% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 1,059,484,000 |
| Holdings Count | Holding | 793 |
| Advisory Fees Paid, Amount | $ 2,747,000 |
| InvestmentCompanyPortfolioTurnover | 77% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $1,059,484 Total Number of Portfolio Holdings 793 Total Advisory Fees Paid (thousands) $2,747 Portfolio Turnover Rate 77% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other (10.3)% Short-Term Investments 17.4% Long-Term Investments 92.9% |
| Material Fund Change [Text Block] | Material Fund Changes Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.32% on an annual basis. Effective March 1, 2024, RIM contractually agreed to waive 0.01% of its advisory fee. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.32% on an annual basis. Effective March 1, 2024, RIM contractually agreed to waive 0.01% of its advisory fee. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000004301 | |
| Shareholder Report [Line Items] | |
| Fund Name | Investment Grade Bond Fund |
| Class Name | Class Y |
| Trading Symbol | RFAYX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class Y $35 0.33% |
| Expenses Paid, Amount | $ 35 |
| Expense Ratio, Percent | 0.33% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Following the rally at the end of 2023, interest rates steadily climbed in 2024, but cooling inflation and a weakening labor market gave central banks confidence to start cutting rates. However, rates volatility (as measured by the ICE BofA MOVE Index) stayed at elevated levels during the fiscal year and increased in October in anticipation of the U.S. general election. Corporate bonds and securitized credit were top performers over the fiscal year as “all-in” yield buyers brought strong demand and drove credit spreads to decade-tight levels. The Fund outperformed its primary benchmark for the fiscal year. The Fund’s overweight duration position and yield curve positioning, both implemented via derivatives, detracted from performance as interest rates increased during the beginning of 2024, but this was partially offset as rates rallied at the end of 2023 and during the last month of the fiscal year. Sector allocation was additive to performance, as overweights to investment grade and high yield corporates and commercial mortgaged-backed securities benefited from a spread tightening environment. The Fund used government bond futures to seek to generate active returns through international rates positioning and currency forwards to seek to generate active returns through currency positioning and these strategies had mixed results during the fiscal year. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B600"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class Y Bloomberg U.S. Aggregate Bond Index 2014 10,000 10,000 2015 10,218 10,196 2016 10,722 10,641 2017 10,790 10,737 2018 10,517 10,517 2019 11,753 11,727 2020 12,551 12,453 2021 12,648 12,393 2022 10,527 10,450 2023 10,487 10,487 2024 11,593 11,593 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class Y 10.54% (0.27)% 1.49% Bloomberg U.S. Aggregate Bond Index 10.55% (0.23)% 1.49% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 1,059,484,000 |
| Holdings Count | Holding | 793 |
| Advisory Fees Paid, Amount | $ 2,747,000 |
| InvestmentCompanyPortfolioTurnover | 77% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $1,059,484 Total Number of Portfolio Holdings 793 Total Advisory Fees Paid (thousands) $2,747 Portfolio Turnover Rate 77% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other (10.3)% Short-Term Investments 17.4% Long-Term Investments 92.9% |
| Material Fund Change [Text Block] | Material Fund Changes Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.32% on an annual basis. Effective March 1, 2024, RIM contractually agreed to waive 0.01% of its advisory fee. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.32% on an annual basis. Effective March 1, 2024, RIM contractually agreed to waive 0.01% of its advisory fee. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000043470 | |
| Shareholder Report [Line Items] | |
| Fund Name | Short Duration Bond Fund |
| Class Name | Class A |
| Trading Symbol | RSBTX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $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? Following the rally at the end of 2023, interest rates steadily climbed in 2024, but cooling inflation and a weakening labor market gave central banks confidence to start cutting rates. However, rates volatility (as measured by the ICE BofA MOVE Index) stayed at elevated levels during the fiscal year and increased in October in anticipation of the U.S. general election. Corporate bonds and securitized credit were top performers over the fiscal year as “all-in” yield buyers brought strong demand and drove credit spreads to decade-tight levels. The Fund outperformed its secondary benchmark for the fiscal year, due primarily to out-of-benchmark exposures to corporate bonds and securitized sectors, which outperformed as credit spreads tightened during the fiscal year. Both of the Fund’s money managers benefitted from their allocations to these spread sectors. The Fund’s overweight duration position and yield curve positioning, both implemented via derivatives, detracted from performance as interest rates increased during the beginning of 2024, but this was partially offset as rates rallied at the end of 2023 and the last month of the fiscal year. The Fund also used government bond futures to seek to generate active returns through international rates positioning and currency forwards to seek to generate active returns through currency positioning and these strategies were additive during the fiscal year. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B630"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class A Bloomberg U.S. Aggregate Bond Index Footnote Reference ICE BofA 1-3 Year US Treasury Index 2014 9,627 10,000 10,000 2015 9,668 10,196 10,078 2016 9,881 10,641 10,170 2017 9,948 10,737 10,195 2018 9,994 10,517 10,221 2019 10,476 11,727 10,685 2020 10,893 12,453 11,026 2021 10,888 12,393 11,000 2022 10,156 10,450 10,487 2023 10,478 10,487 10,795 2024 11,209 11,593 11,418 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class A - with sales charge 4.28% 0.59% 1.15% Class A - no sales charge 6.98% 1.36% 1.53% Bloomberg U.S. Aggregate Bond Index Footnote Reference 10.55% (0.23)% 1.49% ICE BofA 1-3 Year US Treasury Index 5.77% 1.34% 1.34% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 458,695,000 |
| Holdings Count | Holding | 696 |
| Advisory Fees Paid, Amount | $ 1,547,000 |
| InvestmentCompanyPortfolioTurnover | 122% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $458,695 Total Number of Portfolio Holdings 696 Total Advisory Fees Paid (thousands) $1,547 Portfolio Turnover Rate 122% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 0.6% Short-Term Investments 15.0% Long-Term Investments 84.4% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.45% to (i) 0.35% on the first $1 billion; (ii) 0.31% on the next $2 billion; (iii) 0.28% on the next $3 billion; and (iv) 0.26% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.306%. From March 1, 2024 until May 31, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.31%. Effective June 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.292%. In September 2024, RIM hired MetLife Investment Management as a money manager for the Fund. In October 2024, RIM terminated Western Asset Management Company and Western Asset Management Company Limited as a money manager for the Fund. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.45% to (i) 0.35% on the first $1 billion; (ii) 0.31% on the next $2 billion; (iii) 0.28% on the next $3 billion; and (iv) 0.26% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.306%. From March 1, 2024 until May 31, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.31%. Effective June 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.292%. |
| Material Fund Change Adviser [Text Block] | In September 2024, RIM hired MetLife Investment Management as a money manager for the Fund. In October 2024, RIM terminated Western Asset Management Company and Western Asset Management Company Limited as a money manager for the Fund. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000004337 | |
| Shareholder Report [Line Items] | |
| Fund Name | Short Duration Bond Fund |
| Class Name | Class C |
| Trading Symbol | RSBCX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class C $161 1.56% |
| Expenses Paid, Amount | $ 161 |
| Expense Ratio, Percent | 1.56% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Following the rally at the end of 2023, interest rates steadily climbed in 2024, but cooling inflation and a weakening labor market gave central banks confidence to start cutting rates. However, rates volatility (as measured by the ICE BofA MOVE Index) stayed at elevated levels during the fiscal year and increased in October in anticipation of the U.S. general election. Corporate bonds and securitized credit were top performers over the fiscal year as “all-in” yield buyers brought strong demand and drove credit spreads to decade-tight levels. The Fund outperformed its secondary benchmark for the fiscal year, due primarily to out-of-benchmark exposures to corporate bonds and securitized sectors, which outperformed as credit spreads tightened during the fiscal year. Both of the Fund’s money managers benefitted from their allocations to these spread sectors. The Fund’s overweight duration position and yield curve positioning, both implemented via derivatives, detracted from performance as interest rates increased during the beginning of 2024, but this was partially offset as rates rallied at the end of 2023 and the last month of the fiscal year. The Fund also used government bond futures to seek to generate active returns through international rates positioning and currency forwards to seek to generate active returns through currency positioning and these strategies were additive during the fiscal year. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B661"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class C Bloomberg U.S. Aggregate Bond Index Footnote Reference ICE BofA 1-3 Year US Treasury Index 2014 10,000 10,000 10,000 2015 9,971 10,196 10,078 2016 10,115 10,641 10,170 2017 10,109 10,737 10,195 2018 10,075 10,517 10,221 2019 10,487 11,727 10,685 2020 10,817 12,453 11,026 2021 10,737 12,393 11,000 2022 9,937 10,450 10,487 2023 10,177 10,487 10,795 2024 10,808 11,593 11,418 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class C 6.20% 0.61% 0.78% Bloomberg U.S. Aggregate Bond Index Footnote Reference 10.55% (0.23)% 1.49% ICE BofA 1-3 Year US Treasury Index 5.77% 1.34% 1.34% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 458,695,000 |
| Holdings Count | Holding | 696 |
| Advisory Fees Paid, Amount | $ 1,547,000 |
| InvestmentCompanyPortfolioTurnover | 122% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $458,695 Total Number of Portfolio Holdings 696 Total Advisory Fees Paid (thousands) $1,547 Portfolio Turnover Rate 122% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 0.6% Short-Term Investments 15.0% Long-Term Investments 84.4% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.45% to (i) 0.35% on the first $1 billion; (ii) 0.31% on the next $2 billion; (iii) 0.28% on the next $3 billion; and (iv) 0.26% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.306%. From March 1, 2024 until May 31, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.31%. Effective June 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.292%. In September 2024, RIM hired MetLife Investment Management as a money manager for the Fund. In October 2024, RIM terminated Western Asset Management Company and Western Asset Management Company Limited as a money manager for the Fund. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.45% to (i) 0.35% on the first $1 billion; (ii) 0.31% on the next $2 billion; (iii) 0.28% on the next $3 billion; and (iv) 0.26% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.306%. From March 1, 2024 until May 31, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.31%. Effective June 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.292%. |
| Material Fund Change Adviser [Text Block] | In September 2024, RIM hired MetLife Investment Management as a money manager for the Fund. In October 2024, RIM terminated Western Asset Management Company and Western Asset Management Company Limited as a money manager for the Fund. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000178370 | |
| Shareholder Report [Line Items] | |
| Fund Name | Short Duration Bond Fund |
| Class Name | Class M |
| Trading Symbol | RSDTX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class M $53 0.51% |
| Expenses Paid, Amount | $ 53 |
| Expense Ratio, Percent | 0.51% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Following the rally at the end of 2023, interest rates steadily climbed in 2024, but cooling inflation and a weakening labor market gave central banks confidence to start cutting rates. However, rates volatility (as measured by the ICE BofA MOVE Index) stayed at elevated levels during the fiscal year and increased in October in anticipation of the U.S. general election. Corporate bonds and securitized credit were top performers over the fiscal year as “all-in” yield buyers brought strong demand and drove credit spreads to decade-tight levels. The Fund outperformed its secondary benchmark for the fiscal year, due primarily to out-of-benchmark exposures to corporate bonds and securitized sectors, which outperformed as credit spreads tightened during the fiscal year. Both of the Fund’s money managers benefitted from their allocations to these spread sectors. The Fund’s overweight duration position and yield curve positioning, both implemented via derivatives, detracted from performance as interest rates increased during the beginning of 2024, but this was partially offset as rates rallied at the end of 2023 and the last month of the fiscal year. The Fund also used government bond futures to seek to generate active returns through international rates positioning and currency forwards to seek to generate active returns through currency positioning and these strategies were additive during the fiscal year. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B692"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class M Footnote Reference Bloomberg U.S. Aggregate Bond Index Footnote Reference ICE BofA 1-3 Year US Treasury Index 2014 10,000 10,000 10,000 2015 10,067 10,196 10,078 2016 10,315 10,641 10,170 2017 10,420 10,737 10,195 2018 10,502 10,517 10,221 2019 11,041 11,727 10,685 2020 11,509 12,453 11,026 2021 11,545 12,393 11,000 2022 10,795 10,450 10,487 2023 11,178 10,487 10,795 2024 11,997 11,593 11,418 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class M Footnote Reference 7.33% 1.67% 1.84% Bloomberg U.S. Aggregate Bond Index Footnote Reference 10.55% (0.23)% 1.49% ICE BofA 1-3 Year US Treasury Index 5.77% 1.34% 1.34% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 458,695,000 |
| Holdings Count | Holding | 696 |
| Advisory Fees Paid, Amount | $ 1,547,000 |
| InvestmentCompanyPortfolioTurnover | 122% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $458,695 Total Number of Portfolio Holdings 696 Total Advisory Fees Paid (thousands) $1,547 Portfolio Turnover Rate 122% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 0.6% Short-Term Investments 15.0% Long-Term Investments 84.4% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.45% to (i) 0.35% on the first $1 billion; (ii) 0.31% on the next $2 billion; (iii) 0.28% on the next $3 billion; and (iv) 0.26% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.306%. From March 1, 2024 until May 31, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.31%. Effective June 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.292%. In September 2024, RIM hired MetLife Investment Management as a money manager for the Fund. In October 2024, RIM terminated Western Asset Management Company and Western Asset Management Company Limited as a money manager for the Fund. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.45% to (i) 0.35% on the first $1 billion; (ii) 0.31% on the next $2 billion; (iii) 0.28% on the next $3 billion; and (iv) 0.26% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.306%. From March 1, 2024 until May 31, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.31%. Effective June 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.292%. |
| Material Fund Change Adviser [Text Block] | In September 2024, RIM hired MetLife Investment Management as a money manager for the Fund. In October 2024, RIM terminated Western Asset Management Company and Western Asset Management Company Limited as a money manager for the Fund. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000166204 | |
| Shareholder Report [Line Items] | |
| Fund Name | Short Duration Bond Fund |
| Class Name | Class R6 |
| Trading Symbol | RDBRX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class R6 $53 0.51% |
| Expenses Paid, Amount | $ 53 |
| Expense Ratio, Percent | 0.51% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Following the rally at the end of 2023, interest rates steadily climbed in 2024, but cooling inflation and a weakening labor market gave central banks confidence to start cutting rates. However, rates volatility (as measured by the ICE BofA MOVE Index) stayed at elevated levels during the fiscal year and increased in October in anticipation of the U.S. general election. Corporate bonds and securitized credit were top performers over the fiscal year as “all-in” yield buyers brought strong demand and drove credit spreads to decade-tight levels. The Fund outperformed its secondary benchmark for the fiscal year, due primarily to out-of-benchmark exposures to corporate bonds and securitized sectors, which outperformed as credit spreads tightened during the fiscal year. Both of the Fund’s money managers benefitted from their allocations to these spread sectors. The Fund’s overweight duration position and yield curve positioning, both implemented via derivatives, detracted from performance as interest rates increased during the beginning of 2024, but this was partially offset as rates rallied at the end of 2023 and the last month of the fiscal year. The Fund also used government bond futures to seek to generate active returns through international rates positioning and currency forwards to seek to generate active returns through currency positioning and these strategies were additive during the fiscal year. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B723"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class R6 Footnote Reference Bloomberg U.S. Aggregate Bond Index Footnote Reference ICE BofA 1-3 Year US Treasury Index 2014 10,000 10,000 10,000 2015 10,080 10,196 10,078 2016 10,331 10,641 10,170 2017 10,438 10,737 10,195 2018 10,514 10,517 10,221 2019 11,059 11,727 10,685 2020 11,527 12,453 11,026 2021 11,557 12,393 11,000 2022 10,812 10,450 10,487 2023 11,189 10,487 10,795 2024 12,008 11,593 11,418 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class R6 Footnote Reference 7.32% 1.66% 1.85% Bloomberg U.S. Aggregate Bond Index Footnote Reference 10.55% (0.23)% 1.49% ICE BofA 1-3 Year US Treasury Index 5.77% 1.34% 1.34% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 458,695,000 |
| Holdings Count | Holding | 696 |
| Advisory Fees Paid, Amount | $ 1,547,000 |
| InvestmentCompanyPortfolioTurnover | 122% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $458,695 Total Number of Portfolio Holdings 696 Total Advisory Fees Paid (thousands) $1,547 Portfolio Turnover Rate 122% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 0.6% Short-Term Investments 15.0% Long-Term Investments 84.4% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.45% to (i) 0.35% on the first $1 billion; (ii) 0.31% on the next $2 billion; (iii) 0.28% on the next $3 billion; and (iv) 0.26% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.306%. From March 1, 2024 until May 31, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.31%. Effective June 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.292%. In September 2024, RIM hired MetLife Investment Management as a money manager for the Fund. In October 2024, RIM terminated Western Asset Management Company and Western Asset Management Company Limited as a money manager for the Fund. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.45% to (i) 0.35% on the first $1 billion; (ii) 0.31% on the next $2 billion; (iii) 0.28% on the next $3 billion; and (iv) 0.26% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.306%. From March 1, 2024 until May 31, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.31%. Effective June 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.292%. |
| Material Fund Change Adviser [Text Block] | In September 2024, RIM hired MetLife Investment Management as a money manager for the Fund. In October 2024, RIM terminated Western Asset Management Company and Western Asset Management Company Limited as a money manager for the Fund. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000004336 | |
| Shareholder Report [Line Items] | |
| Fund Name | Short Duration Bond Fund |
| Class Name | Class S |
| Trading Symbol | RFBSX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class S $58 0.56% |
| Expenses Paid, Amount | $ 58 |
| Expense Ratio, Percent | 0.56% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Following the rally at the end of 2023, interest rates steadily climbed in 2024, but cooling inflation and a weakening labor market gave central banks confidence to start cutting rates. However, rates volatility (as measured by the ICE BofA MOVE Index) stayed at elevated levels during the fiscal year and increased in October in anticipation of the U.S. general election. Corporate bonds and securitized credit were top performers over the fiscal year as “all-in” yield buyers brought strong demand and drove credit spreads to decade-tight levels. The Fund outperformed its secondary benchmark for the fiscal year, due primarily to out-of-benchmark exposures to corporate bonds and securitized sectors, which outperformed as credit spreads tightened during the fiscal year. Both of the Fund’s money managers benefitted from their allocations to these spread sectors. The Fund’s overweight duration position and yield curve positioning, both implemented via derivatives, detracted from performance as interest rates increased during the beginning of 2024, but this was partially offset as rates rallied at the end of 2023 and the last month of the fiscal year. The Fund also used government bond futures to seek to generate active returns through international rates positioning and currency forwards to seek to generate active returns through currency positioning and these strategies were additive during the fiscal year. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B754"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class S Bloomberg U.S. Aggregate Bond Index Footnote Reference ICE BofA 1-3 Year US Treasury Index 2014 10,000 10,000 10,000 2015 10,067 10,196 10,078 2016 10,315 10,641 10,170 2017 10,411 10,737 10,195 2018 10,488 10,517 10,221 2019 11,021 11,727 10,685 2020 11,483 12,453 11,026 2021 11,512 12,393 11,000 2022 10,761 10,450 10,487 2023 11,132 10,487 10,795 2024 11,942 11,593 11,418 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class S 7.28% 1.62% 1.79% Bloomberg U.S. Aggregate Bond Index Footnote Reference 10.55% (0.23)% 1.49% ICE BofA 1-3 Year US Treasury Index 5.77% 1.34% 1.34% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 458,695,000 |
| Holdings Count | Holding | 696 |
| Advisory Fees Paid, Amount | $ 1,547,000 |
| InvestmentCompanyPortfolioTurnover | 122% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $458,695 Total Number of Portfolio Holdings 696 Total Advisory Fees Paid (thousands) $1,547 Portfolio Turnover Rate 122% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 0.6% Short-Term Investments 15.0% Long-Term Investments 84.4% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.45% to (i) 0.35% on the first $1 billion; (ii) 0.31% on the next $2 billion; (iii) 0.28% on the next $3 billion; and (iv) 0.26% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.306%. From March 1, 2024 until May 31, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.31%. Effective June 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.292%. In September 2024, RIM hired MetLife Investment Management as a money manager for the Fund. In October 2024, RIM terminated Western Asset Management Company and Western Asset Management Company Limited as a money manager for the Fund. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.45% to (i) 0.35% on the first $1 billion; (ii) 0.31% on the next $2 billion; (iii) 0.28% on the next $3 billion; and (iv) 0.26% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.306%. From March 1, 2024 until May 31, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.31%. Effective June 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.292%. |
| Material Fund Change Adviser [Text Block] | In September 2024, RIM hired MetLife Investment Management as a money manager for the Fund. In October 2024, RIM terminated Western Asset Management Company and Western Asset Management Company Limited as a money manager for the Fund. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000066918 | |
| Shareholder Report [Line Items] | |
| Fund Name | Short Duration Bond Fund |
| Class Name | Class Y |
| Trading Symbol | RSBYX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class Y $50 0.48% |
| Expenses Paid, Amount | $ 50 |
| Expense Ratio, Percent | 0.48% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Following the rally at the end of 2023, interest rates steadily climbed in 2024, but cooling inflation and a weakening labor market gave central banks confidence to start cutting rates. However, rates volatility (as measured by the ICE BofA MOVE Index) stayed at elevated levels during the fiscal year and increased in October in anticipation of the U.S. general election. Corporate bonds and securitized credit were top performers over the fiscal year as “all-in” yield buyers brought strong demand and drove credit spreads to decade-tight levels. The Fund outperformed its secondary benchmark for the fiscal year, due primarily to out-of-benchmark exposures to corporate bonds and securitized sectors, which outperformed as credit spreads tightened during the fiscal year. Both of the Fund’s money managers benefitted from their allocations to these spread sectors. The Fund’s overweight duration position and yield curve positioning, both implemented via derivatives, detracted from performance as interest rates increased during the beginning of 2024, but this was partially offset as rates rallied at the end of 2023 and the last month of the fiscal year. The Fund also used government bond futures to seek to generate active returns through international rates positioning and currency forwards to seek to generate active returns through currency positioning and these strategies were additive during the fiscal year. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B785"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class Y Bloomberg U.S. Aggregate Bond Index Footnote Reference ICE BofA 1-3 Year US Treasury Index 2014 10,000 10,000 10,000 2015 10,080 10,196 10,078 2016 10,336 10,641 10,170 2017 10,441 10,737 10,195 2018 10,519 10,517 10,221 2019 11,068 11,727 10,685 2020 11,540 12,453 11,026 2021 11,578 12,393 11,000 2022 10,834 10,450 10,487 2023 11,215 10,487 10,795 2024 12,039 11,593 11,418 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class Y 7.35% 1.70% 1.87% Bloomberg U.S. Aggregate Bond Index Footnote Reference 10.55% (0.23)% 1.49% ICE BofA 1-3 Year US Treasury Index 5.77% 1.34% 1.34% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 458,695,000 |
| Holdings Count | Holding | 696 |
| Advisory Fees Paid, Amount | $ 1,547,000 |
| InvestmentCompanyPortfolioTurnover | 122% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $458,695 Total Number of Portfolio Holdings 696 Total Advisory Fees Paid (thousands) $1,547 Portfolio Turnover Rate 122% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 0.6% Short-Term Investments 15.0% Long-Term Investments 84.4% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.45% to (i) 0.35% on the first $1 billion; (ii) 0.31% on the next $2 billion; (iii) 0.28% on the next $3 billion; and (iv) 0.26% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.306%. From March 1, 2024 until May 31, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.31%. Effective June 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.292%. In September 2024, RIM hired MetLife Investment Management as a money manager for the Fund. In October 2024, RIM terminated Western Asset Management Company and Western Asset Management Company Limited as a money manager for the Fund. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.45% to (i) 0.35% on the first $1 billion; (ii) 0.31% on the next $2 billion; (iii) 0.28% on the next $3 billion; and (iv) 0.26% in excess of $6 billion. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.306%. From March 1, 2024 until May 31, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.31%. Effective June 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.292%. |
| Material Fund Change Adviser [Text Block] | In September 2024, RIM hired MetLife Investment Management as a money manager for the Fund. In October 2024, RIM terminated Western Asset Management Company and Western Asset Management Company Limited as a money manager for the Fund. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000155368 | |
| Shareholder Report [Line Items] | |
| Fund Name | Tax-Exempt High Yield Bond Fund |
| Class Name | Class A |
| Trading Symbol | RTHAX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class A $97 0.90% |
| Expenses Paid, Amount | $ 97 |
| Expense Ratio, Percent | 0.90% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Through the end of the Fund's fiscal year, strong demand was able to keep up with the surge in supply of new municipal bonds as issuers looked to avoid potential volatility around the U.S. election. High yield municipals outperformed their investment grade counterparts over the fiscal year, as both mutual funds and ETFs witnessed inflows. Healthcare and education were among the top performing high yield sectors, while airline, electric, and transportation lagged the Bloomberg Municipal High Yield Index. The Fund outperformed the 60% Bloomberg Municipal High Yield Index/40% Bloomberg Municipal Bond Index for the fiscal year. The Fund’s overweight to BBB-rated municipals and underweight to AAA- and AA-rated municipals was additive to performance while an underweight to high yield municipals detracted, as lower quality cohorts significantly outperformed over the fiscal year. As rates rallied at the end of 2023 and in the second half of the fiscal year , an overweight to longer maturing municipals contributed positively. This was partially offset by an overweight duration position as rates rose during the first half of 2024 and in October. Overweight positions within the education sector and an underweight to utility sectors also contributed positively. Additionally, the Fund’s underweight to California was additive. Both of the Fund’s money managers outperformed the Bloomberg Municipal Bond Index over the fiscal year, benefiting from their positioning within the transportation and healthcare sectors, strong security selection and overweight duration positioning. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B816"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class A Bloomberg Municipal Bond Index Footnote Reference Bloomberg U.S. Aggregate Bond Index 60% Bloomberg Municipal High Yield Index/40% Bloomberg Municipal Bond Index 6/1/2015 9,625 10,000 10,000 10,000 2015 9,827 10,206 10,062 10,046 2016 10,671 10,620 10,502 10,727 2017 10,885 10,853 10,597 11,014 2018 11,263 10,797 10,379 11,302 2019 12,394 11,814 11,574 12,518 2020 12,452 12,239 12,290 12,802 2021 13,504 12,561 12,231 13,749 2022 11,231 11,057 10,313 11,731 2023 11,514 11,349 10,350 12,134 2024 13,300 12,449 11,441 13,870 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years Since Inception Class A - with sales charge 11.17% 0.65% 3.07% Class A - no sales charge 15.51% 1.42% 3.49% Bloomberg Municipal Bond Index Footnote Reference 9.70% 1.05% 2.35% Bloomberg U.S. Aggregate Bond Index 10.55% (0.23)% 1.44% 60% Bloomberg Municipal High Yield Index/40% Bloomberg Municipal Bond Index 14.31% 2.07% 3.54% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 2,074,644,000 |
| Holdings Count | Holding | 2,678 |
| Advisory Fees Paid, Amount | $ 9,183,000 |
| InvestmentCompanyPortfolioTurnover | 16% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $2,074,644 Total Number of Portfolio Holdings 2,678 Total Advisory Fees Paid (thousands) $9,183 Portfolio Turnover Rate 16% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 0.8% Short-Term Investments 3.8% Long-Term Investments 95.4% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee was changed from 0.50% to 0.47%. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.44% on an annual basis. Effective March 1, 2024, RIM contractually agreed to waive 0.12% of its advisory fee. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee was changed from 0.50% to 0.47%. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.44% on an annual basis. Effective March 1, 2024, RIM contractually agreed to waive 0.12% of its advisory fee. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000155369 | |
| Shareholder Report [Line Items] | |
| Fund Name | Tax-Exempt High Yield Bond Fund |
| Class Name | Class C |
| Trading Symbol | RTHCX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class C $177 1.65% |
| Expenses Paid, Amount | $ 177 |
| Expense Ratio, Percent | 1.65% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Through the end of the Fund's fiscal year, strong demand was able to keep up with the surge in supply of new municipal bonds as issuers looked to avoid potential volatility around the U.S. election. High yield municipals outperformed their investment grade counterparts over the fiscal year, as both mutual funds and ETFs witnessed inflows. Healthcare and education were among the top performing high yield sectors, while airline, electric, and transportation lagged the Bloomberg Municipal High Yield Index. The Fund outperformed the 60% Bloomberg Municipal High Yield Index/40% Bloomberg Municipal Bond Index for the fiscal year. The Fund’s overweight to BBB-rated municipals and underweight to AAA- and AA-rated municipals was additive to performance while an underweight to high yield municipals detracted, as lower quality cohorts significantly outperformed over the fiscal year. As rates rallied at the end of 2023 and in the second half of the fiscal year , an overweight to longer maturing municipals contributed positively. This was partially offset by an overweight duration position as rates rose during the first half of 2024 and in October. Overweight positions within the education sector and an underweight to utility sectors also contributed positively. Additionally, the Fund’s underweight to California was additive. Both of the Fund’s money managers outperformed the Bloomberg Municipal Bond Index over the fiscal year, benefiting from their positioning within the transportation and healthcare sectors, strong security selection and overweight duration positioning. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B846"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class C Bloomberg Municipal Bond Index Footnote Reference Bloomberg U.S. Aggregate Bond Index 60% Bloomberg Municipal High Yield Index/40% Bloomberg Municipal Bond Index 6/1/2015 10,000 10,000 10,000 10,000 2015 10,182 10,206 10,062 10,046 2016 10,975 10,620 10,502 10,727 2017 11,117 10,853 10,597 11,014 2018 11,419 10,797 10,379 11,302 2019 12,467 11,814 11,574 12,518 2020 12,441 12,239 12,290 12,802 2021 13,385 12,561 12,231 13,749 2022 11,035 11,057 10,313 11,731 2023 11,230 11,349 10,350 12,134 2024 12,885 12,449 11,441 13,870 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years Since Inception Class C 14.73% 0.66% 2.73% Bloomberg Municipal Bond Index Footnote Reference 9.70% 1.05% 2.35% Bloomberg U.S. Aggregate Bond Index 10.55% (0.23)% 1.44% 60% Bloomberg Municipal High Yield Index/40% Bloomberg Municipal Bond Index 14.31% 2.07% 3.54% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 2,074,644,000 |
| Holdings Count | Holding | 2,678 |
| Advisory Fees Paid, Amount | $ 9,183,000 |
| InvestmentCompanyPortfolioTurnover | 16% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $2,074,644 Total Number of Portfolio Holdings 2,678 Total Advisory Fees Paid (thousands) $9,183 Portfolio Turnover Rate 16% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 0.8% Short-Term Investments 3.8% Long-Term Investments 95.4% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee was changed from 0.50% to 0.47%. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.44% on an annual basis. Effective March 1, 2024, RIM contractually agreed to waive 0.12% of its advisory fee. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee was changed from 0.50% to 0.47%. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.44% on an annual basis. Effective March 1, 2024, RIM contractually agreed to waive 0.12% of its advisory fee. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000178433 | |
| Shareholder Report [Line Items] | |
| Fund Name | Tax-Exempt High Yield Bond Fund |
| Class Name | Class M |
| Trading Symbol | RHYTX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class M $59 0.55% |
| Expenses Paid, Amount | $ 59 |
| Expense Ratio, Percent | 0.55% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Through the end of the Fund's fiscal year, strong demand was able to keep up with the surge in supply of new municipal bonds as issuers looked to avoid potential volatility around the U.S. election. High yield municipals outperformed their investment grade counterparts over the fiscal year, as both mutual funds and ETFs witnessed inflows. Healthcare and education were among the top performing high yield sectors, while airline, electric, and transportation lagged the Bloomberg Municipal High Yield Index. The Fund outperformed the 60% Bloomberg Municipal High Yield Index/40% Bloomberg Municipal Bond Index for the fiscal year. The Fund’s overweight to BBB-rated municipals and underweight to AAA- and AA-rated municipals was additive to performance while an underweight to high yield municipals detracted, as lower quality cohorts significantly outperformed over the fiscal year. As rates rallied at the end of 2023 and in the second half of the fiscal year , an overweight to longer maturing municipals contributed positively. This was partially offset by an overweight duration position as rates rose during the first half of 2024 and in October. Overweight positions within the education sector and an underweight to utility sectors also contributed positively. Additionally, the Fund’s underweight to California was additive. Both of the Fund’s money managers outperformed the Bloomberg Municipal Bond Index over the fiscal year, benefiting from their positioning within the transportation and healthcare sectors, strong security selection and overweight duration positioning. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B876"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class M Footnote Reference Bloomberg Municipal Bond Index Footnote Reference Bloomberg U.S. Aggregate Bond Index 60% Bloomberg Municipal High Yield Index/40% Bloomberg Municipal Bond Index 6/1/2015 10,000 10,000 10,000 10,000 2015 10,220 10,206 10,062 10,046 2016 11,134 10,620 10,502 10,727 2017 11,382 10,853 10,597 11,014 2018 11,830 10,797 10,379 11,302 2019 13,052 11,814 11,574 12,518 2020 13,168 12,239 12,290 12,802 2021 14,328 12,561 12,231 13,749 2022 11,951 11,057 10,313 11,731 2023 12,295 11,349 10,350 12,134 2024 14,250 12,449 11,441 13,870 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years Since Inception Class M Footnote Reference 15.90% 1.77% 3.83% Bloomberg Municipal Bond Index Footnote Reference 9.70% 1.05% 2.35% Bloomberg U.S. Aggregate Bond Index 10.55% (0.23)% 1.44% 60% Bloomberg Municipal High Yield Index/40% Bloomberg Municipal Bond Index 14.31% 2.07% 3.54% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 2,074,644,000 |
| Holdings Count | Holding | 2,678 |
| Advisory Fees Paid, Amount | $ 9,183,000 |
| InvestmentCompanyPortfolioTurnover | 16% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $2,074,644 Total Number of Portfolio Holdings 2,678 Total Advisory Fees Paid (thousands) $9,183 Portfolio Turnover Rate 16% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 0.8% Short-Term Investments 3.8% Long-Term Investments 95.4% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee was changed from 0.50% to 0.47%. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.44% on an annual basis. Effective March 1, 2024, RIM contractually agreed to waive 0.12% of its advisory fee. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee was changed from 0.50% to 0.47%. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.44% on an annual basis. Effective March 1, 2024, RIM contractually agreed to waive 0.12% of its advisory fee. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000155371 | |
| Shareholder Report [Line Items] | |
| Fund Name | Tax-Exempt High Yield Bond Fund |
| Class Name | Class S |
| Trading Symbol | RTHSX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class S $67 0.62% |
| Expenses Paid, Amount | $ 67 |
| Expense Ratio, Percent | 0.62% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Through the end of the Fund's fiscal year, strong demand was able to keep up with the surge in supply of new municipal bonds as issuers looked to avoid potential volatility around the U.S. election. High yield municipals outperformed their investment grade counterparts over the fiscal year, as both mutual funds and ETFs witnessed inflows. Healthcare and education were among the top performing high yield sectors, while airline, electric, and transportation lagged the Bloomberg Municipal High Yield Index. The Fund outperformed the 60% Bloomberg Municipal High Yield Index/40% Bloomberg Municipal Bond Index for the fiscal year. The Fund’s overweight to BBB-rated municipals and underweight to AAA- and AA-rated municipals was additive to performance while an underweight to high yield municipals detracted, as lower quality cohorts significantly outperformed over the fiscal year. As rates rallied at the end of 2023 and in the second half of the fiscal year , an overweight to longer maturing municipals contributed positively. This was partially offset by an overweight duration position as rates rose during the first half of 2024 and in October. Overweight positions within the education sector and an underweight to utility sectors also contributed positively. Additionally, the Fund’s underweight to California was additive. Both of the Fund’s money managers outperformed the Bloomberg Municipal Bond Index over the fiscal year, benefiting from their positioning within the transportation and healthcare sectors, strong security selection and overweight duration positioning. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B906"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class S Bloomberg Municipal Bond Index Footnote Reference Bloomberg U.S. Aggregate Bond Index 60% Bloomberg Municipal High Yield Index/40% Bloomberg Municipal Bond Index 6/1/2015 10,000 10,000 10,000 10,000 2015 10,220 10,206 10,062 10,046 2016 11,134 10,620 10,502 10,727 2017 11,385 10,853 10,597 11,014 2018 11,809 10,797 10,379 11,302 2019 13,016 11,814 11,574 12,518 2020 13,119 12,239 12,290 12,802 2021 14,274 12,561 12,231 13,749 2022 11,886 11,057 10,313 11,731 2023 12,220 11,349 10,350 12,134 2024 14,168 12,449 11,441 13,870 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years Since Inception Class S 15.94% 1.71% 3.77% Bloomberg Municipal Bond Index Footnote Reference 9.70% 1.05% 2.35% Bloomberg U.S. Aggregate Bond Index 10.55% (0.23)% 1.44% 60% Bloomberg Municipal High Yield Index/40% Bloomberg Municipal Bond Index 14.31% 2.07% 3.54% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 2,074,644,000 |
| Holdings Count | Holding | 2,678 |
| Advisory Fees Paid, Amount | $ 9,183,000 |
| InvestmentCompanyPortfolioTurnover | 16% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $2,074,644 Total Number of Portfolio Holdings 2,678 Total Advisory Fees Paid (thousands) $9,183 Portfolio Turnover Rate 16% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 0.8% Short-Term Investments 3.8% Long-Term Investments 95.4% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee was changed from 0.50% to 0.47%. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.44% on an annual basis. Effective March 1, 2024, RIM contractually agreed to waive 0.12% of its advisory fee. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee was changed from 0.50% to 0.47%. Until February 29, 2024, Russell Investment Management, LLC ("RIM") contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.44% on an annual basis. Effective March 1, 2024, RIM contractually agreed to waive 0.12% of its advisory fee. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000089692 | |
| Shareholder Report [Line Items] | |
| Fund Name | Tax-Exempt Bond Fund |
| Class Name | Class A |
| Trading Symbol | RTEAX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class A $83 0.80% |
| Expenses Paid, Amount | $ 83 |
| Expense Ratio, Percent | 0.80% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Through the end of the Fund's fiscal year, strong demand was able to keep up with the surge in supply of new municipal bonds as issuers looked to avoid potential volatility around the U.S. Election. BBB-rated municipals outperformed higher quality cohorts over the fiscal year, but still underperformed against the Bloomberg Municipal High Yield Index. Healthcare and housing were among the top performing sectors, while Iowa and New Hampshire were among the top performing states. The Fund outperformed the Bloomberg Municipal 1-15 Year Blend (1-17) Index for the fiscal year. The Fund’s overweight to BBB-rated municipals and underweight to AAA- and AA-rated municipals was additive to performance, as lower quality cohorts significantly outperformed over the fiscal year. As rates rallied at the end of 2023 and in the second half of the fiscal year, an overweight to longer maturing municipals contributed positively. This was partially offset by an overweight duration position as rates rose during the first half of 2024 and in October. Overweight positions within the health care, housing and industrial development revenue/pollution control revenue sectors also contributed positively. Additionally, the Fund’s underweight to California and overweights to Florida and Georgia were additive. Both of the Fund’s money managers outperformed the Bloomberg Municipal Bond Index over the fiscal year, benefiting from their sector/state allocation and overweight to lower quality cohorts. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B935"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class A Bloomberg Municipal Bond Index Footnote Reference Bloomberg U.S. Aggregate Bond Index Bloomberg Municipal 1-15 Year Blend (1-17) Index 2014 9,624 10,000 10,000 10,000 2015 9,832 10,287 10,196 10,246 2016 10,164 10,704 10,641 10,563 2017 10,290 10,939 10,737 10,768 2018 10,263 10,883 10,517 10,711 2019 11,090 11,908 11,727 11,580 2020 11,319 12,336 12,453 12,004 2021 11,683 12,661 12,393 12,218 2022 10,433 11,144 10,450 11,125 2023 10,749 11,439 10,487 11,400 2024 11,651 12,548 11,593 12,258 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class A - with sales charge 4.31% 0.22% 1.54% Class A - no sales charge 8.39% 0.99% 1.93% Bloomberg Municipal Bond Index Footnote Reference 9.70% 1.05% 2.30% Bloomberg U.S. Aggregate Bond Index 10.55% (0.23)% 1.49% Bloomberg Municipal 1-15 Year Blend (1-17) Index 7.53% 1.14% 2.06% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 5,744,157,000 |
| Holdings Count | Holding | 3,218 |
| Advisory Fees Paid, Amount | $ 16,065,000 |
| InvestmentCompanyPortfolioTurnover | 39% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $5,744,157 Total Number of Portfolio Holdings 3,218 Total Advisory Fees Paid (thousands) $16,065 Portfolio Turnover Rate 39% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 2.0% Short-Term Investments 0.0% Long-Term Investments 98.0% |
| C000004331 | |
| Shareholder Report [Line Items] | |
| Fund Name | Tax-Exempt Bond Fund |
| Class Name | Class C |
| Trading Symbol | RTECX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class C $157 1.51% |
| Expenses Paid, Amount | $ 157 |
| Expense Ratio, Percent | 1.51% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Through the end of the Fund's fiscal year, strong demand was able to keep up with the surge in supply of new municipal bonds as issuers looked to avoid potential volatility around the U.S. Election. BBB-rated municipals outperformed higher quality cohorts over the fiscal year, but still underperformed against the Bloomberg Municipal High Yield Index. Healthcare and housing were among the top performing sectors, while Iowa and New Hampshire were among the top performing states. The Fund outperformed the Bloomberg Municipal 1-15 Year Blend (1-17) Index for the fiscal year. The Fund’s overweight to BBB-rated municipals and underweight to AAA- and AA-rated municipals was additive to performance, as lower quality cohorts significantly outperformed over the fiscal year. As rates rallied at the end of 2023 and in the second half of the fiscal year, an overweight to longer maturing municipals contributed positively. This was partially offset by an overweight duration position as rates rose during the first half of 2024 and in October. Overweight positions within the health care, housing and industrial development revenue/pollution control revenue sectors also contributed positively. Additionally, the Fund’s underweight to California and overweights to Florida and Georgia were additive. Both of the Fund’s money managers outperformed the Bloomberg Municipal Bond Index over the fiscal year, benefiting from their sector/state allocation and overweight to lower quality cohorts. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B961"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class C Bloomberg Municipal Bond Index Footnote Reference Bloomberg U.S. Aggregate Bond Index Bloomberg Municipal 1-15 Year Blend (1-17) Index 2014 10,000 10,000 10,000 10,000 2015 10,145 10,287 10,196 10,246 2016 10,416 10,704 10,641 10,563 2017 10,466 10,939 10,737 10,768 2018 10,370 10,883 10,517 10,711 2019 11,126 11,908 11,727 11,580 2020 11,276 12,336 12,453 12,004 2021 11,551 12,661 12,393 12,218 2022 10,248 11,144 10,450 11,125 2023 10,481 11,439 10,487 11,400 2024 11,282 12,548 11,593 12,258 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class C 7.65% 0.28% 1.21% Bloomberg Municipal Bond Index Footnote Reference 9.70% 1.05% 2.30% Bloomberg U.S. Aggregate Bond Index 10.55% (0.23)% 1.49% Bloomberg Municipal 1-15 Year Blend (1-17) Index 7.53% 1.14% 2.06% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 5,744,157,000 |
| Holdings Count | Holding | 3,218 |
| Advisory Fees Paid, Amount | $ 16,065,000 |
| InvestmentCompanyPortfolioTurnover | 39% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $5,744,157 Total Number of Portfolio Holdings 3,218 Total Advisory Fees Paid (thousands) $16,065 Portfolio Turnover Rate 39% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 2.0% Short-Term Investments 0.0% Long-Term Investments 98.0% |
| C000178365 | |
| Shareholder Report [Line Items] | |
| Fund Name | Tax-Exempt Bond Fund |
| Class Name | Class M |
| Trading Symbol | RBCUX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class M $43 0.41% |
| Expenses Paid, Amount | $ 43 |
| Expense Ratio, Percent | 0.41% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Through the end of the Fund's fiscal year, strong demand was able to keep up with the surge in supply of new municipal bonds as issuers looked to avoid potential volatility around the U.S. Election. BBB-rated municipals outperformed higher quality cohorts over the fiscal year, but still underperformed against the Bloomberg Municipal High Yield Index. Healthcare and housing were among the top performing sectors, while Iowa and New Hampshire were among the top performing states. The Fund outperformed the Bloomberg Municipal 1-15 Year Blend (1-17) Index for the fiscal year. The Fund’s overweight to BBB-rated municipals and underweight to AAA- and AA-rated municipals was additive to performance, as lower quality cohorts significantly outperformed over the fiscal year. As rates rallied at the end of 2023 and in the second half of the fiscal year, an overweight to longer maturing municipals contributed positively. This was partially offset by an overweight duration position as rates rose during the first half of 2024 and in October. Overweight positions within the health care, housing and industrial development revenue/pollution control revenue sectors also contributed positively. Additionally, the Fund’s underweight to California and overweights to Florida and Georgia were additive. Both of the Fund’s money managers outperformed the Bloomberg Municipal Bond Index over the fiscal year, benefiting from their sector/state allocation and overweight to lower quality cohorts. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B987"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class M Footnote Reference Bloomberg Municipal Bond Index Footnote Reference Bloomberg U.S. Aggregate Bond Index Bloomberg Municipal 1-15 Year Blend (1-17) Index 2014 10,000 10,000 10,000 10,000 2015 10,247 10,287 10,196 10,246 2016 10,625 10,704 10,641 10,563 2017 10,796 10,939 10,737 10,768 2018 10,814 10,883 10,517 10,711 2019 11,729 11,908 11,727 11,580 2020 12,014 12,336 12,453 12,004 2021 12,450 12,661 12,393 12,218 2022 11,162 11,144 10,450 11,125 2023 11,545 11,439 10,487 11,400 2024 12,559 12,548 11,593 12,258 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class M Footnote Reference 8.78% 1.38% 2.30% Bloomberg Municipal Bond Index Footnote Reference 9.70% 1.05% 2.30% Bloomberg U.S. Aggregate Bond Index 10.55% (0.23)% 1.49% Bloomberg Municipal 1-15 Year Blend (1-17) Index 7.53% 1.14% 2.06% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 5,744,157,000 |
| Holdings Count | Holding | 3,218 |
| Advisory Fees Paid, Amount | $ 16,065,000 |
| InvestmentCompanyPortfolioTurnover | 39% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $5,744,157 Total Number of Portfolio Holdings 3,218 Total Advisory Fees Paid (thousands) $16,065 Portfolio Turnover Rate 39% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 2.0% Short-Term Investments 0.0% Long-Term Investments 98.0% |
| C000004330 | |
| Shareholder Report [Line Items] | |
| Fund Name | Tax-Exempt Bond Fund |
| Class Name | Class S |
| Trading Symbol | RLVSX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class S $53 0.51% |
| Expenses Paid, Amount | $ 53 |
| Expense Ratio, Percent | 0.51% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Through the end of the Fund's fiscal year, strong demand was able to keep up with the surge in supply of new municipal bonds as issuers looked to avoid potential volatility around the U.S. Election. BBB-rated municipals outperformed higher quality cohorts over the fiscal year, but still underperformed against the Bloomberg Municipal High Yield Index. Healthcare and housing were among the top performing sectors, while Iowa and New Hampshire were among the top performing states. The Fund outperformed the Bloomberg Municipal 1-15 Year Blend (1-17) Index for the fiscal year. The Fund’s overweight to BBB-rated municipals and underweight to AAA- and AA-rated municipals was additive to performance, as lower quality cohorts significantly outperformed over the fiscal year. As rates rallied at the end of 2023 and in the second half of the fiscal year, an overweight to longer maturing municipals contributed positively. This was partially offset by an overweight duration position as rates rose during the first half of 2024 and in October. Overweight positions within the health care, housing and industrial development revenue/pollution control revenue sectors also contributed positively. Additionally, the Fund’s underweight to California and overweights to Florida and Georgia were additive. Both of the Fund’s money managers outperformed the Bloomberg Municipal Bond Index over the fiscal year, benefiting from their sector/state allocation and overweight to lower quality cohorts. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B1013"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class S Bloomberg Municipal Bond Index Footnote Reference Bloomberg U.S. Aggregate Bond Index Bloomberg Municipal 1-15 Year Blend (1-17) Index 2014 10,000 10,000 10,000 10,000 2015 10,247 10,287 10,196 10,246 2016 10,625 10,704 10,641 10,563 2017 10,784 10,939 10,737 10,768 2018 10,792 10,883 10,517 10,711 2019 11,693 11,908 11,727 11,580 2020 11,970 12,336 12,453 12,004 2021 12,387 12,661 12,393 12,218 2022 11,100 11,144 10,450 11,125 2023 11,464 11,439 10,487 11,400 2024 12,465 12,548 11,593 12,258 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class S 8.73% 1.29% 2.23% Bloomberg Municipal Bond Index Footnote Reference 9.70% 1.05% 2.30% Bloomberg U.S. Aggregate Bond Index 10.55% (0.23)% 1.49% Bloomberg Municipal 1-15 Year Blend (1-17) Index 7.53% 1.14% 2.06% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 5,744,157,000 |
| Holdings Count | Holding | 3,218 |
| Advisory Fees Paid, Amount | $ 16,065,000 |
| InvestmentCompanyPortfolioTurnover | 39% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $5,744,157 Total Number of Portfolio Holdings 3,218 Total Advisory Fees Paid (thousands) $16,065 Portfolio Turnover Rate 39% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 2.0% Short-Term Investments 0.0% Long-Term Investments 98.0% |
| C000089834 | |
| Shareholder Report [Line Items] | |
| Fund Name | Global Infrastructure Fund |
| Class Name | Class A |
| Trading Symbol | RGIAX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class A $144 1.27% |
| Expenses Paid, Amount | $ 144 |
| Expense Ratio, Percent | 1.27% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? For the fiscal year, the global infrastructure market modestly underperformed broader global equities. Within the global infrastructure sector, energy infrastructure was the top performing category. Utilities followed closely, led by electric utilities, benefiting from anticipated U.S. Federal Reserve rate cuts, expected increases in electricity demand and a shift towards defensive assets due to economic growth concerns. Transports, including the airports and seaports sectors, finished slightly behind the Fund’s secondary benchmark, but still experienced strong performance. The Fund underperformed its secondary benchmark during the period. Negative security selection among electric utilities had the largest impact on performance. Out-of-index exposure to freight rail further detracted. An underweight to airports and favorable security selection among seaports was beneficial. Money manager performance was mixed for the fiscal year, with two managers hindered by unfavorable stock selection in the electric utilities sector and one manager benefiting from positive security selection in the energy infrastructure and seaport sectors. Russell Investment Management, LLC’s (“RIM”) positioning strategy, which implemented sector tilting through the purchase of infrastructure stocks, underperformed the Fund’s secondary benchmark. An underweight to electric utilities and airports detracted from performance while an overweight to renewable electricity was beneficial. During the fiscal year, the Fund used index futures contracts to equitize the Fund’s cash and this strategy performed as intended. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B1040"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class A MSCI World Index (Net ) Footnote Reference S& P ® 2014 9,424 10,000 10,000 2015 9,095 10,177 9,371 2016 9,589 10,298 9,871 2017 11,036 12,643 11,501 2018 10,254 12,789 10,529 2019 12,356 14,413 12,629 2020 10,810 15,042 10,508 2021 13,566 21,122 13,443 2022 12,759 17,219 12,714 2023 12,459 19,024 12,430 2024 15,869 25,431 16,409 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class A - with sales charge 20.02% 3.89% 4.73% Class A - no sales charge 27.37% 5.13% 5.35% MSCI World Index (Net ) Footnote Reference 33.68% 12.03% 9.78% S& P ® 32.01% 5.38% 5.08% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 342,101,000 |
| Holdings Count | Holding | 135 |
| Advisory Fees Paid, Amount | $ 3,090,000 |
| InvestmentCompanyPortfolioTurnover | 67% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $342,101 Total Number of Portfolio Holdings 135 Total Advisory Fees Paid (thousands) $3,090 Portfolio Turnover Rate 67% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 0.4% Short-Term Investments 2.7% Common Stocks 96.9% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 1.25% to (i) 0.85% on the first $1 billion; (ii) 0.81% on the next $2 billion; (iii) 0.78% on the next $3 billion; and (iv) 0.76% in excess of $6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.85% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.83% on an annual basis. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 1.25% to (i) 0.85% on the first $1 billion; (ii) 0.81% on the next $2 billion; (iii) 0.78% on the next $3 billion; and (iv) 0.76% in excess of $6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.85% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.83% on an annual basis. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000089835 | |
| Shareholder Report [Line Items] | |
| Fund Name | Global Infrastructure Fund |
| Class Name | Class C |
| Trading Symbol | RGCIX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class C $229 2.02% |
| Expenses Paid, Amount | $ 229 |
| Expense Ratio, Percent | 2.02% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? For the fiscal year, the global infrastructure market modestly underperformed broader global equities. Within the global infrastructure sector, energy infrastructure was the top performing category. Utilities followed closely, led by electric utilities, benefiting from anticipated U.S. Federal Reserve rate cuts, expected increases in electricity demand and a shift towards defensive assets due to economic growth concerns. Transports, including the airports and seaports sectors, finished slightly behind the Fund’s secondary benchmark, but still experienced strong performance. The Fund underperformed its secondary benchmark during the period. Negative security selection among electric utilities had the largest impact on performance. Out-of-index exposure to freight rail further detracted. An underweight to airports and favorable security selection among seaports was beneficial. Money manager performance was mixed for the fiscal year, with two managers hindered by unfavorable stock selection in the electric utilities sector and one manager benefiting from positive security selection in the energy infrastructure and seaport sectors. Russell Investment Management, LLC’s (“RIM”) positioning strategy, which implemented sector tilting through the purchase of infrastructure stocks, underperformed the Fund’s secondary benchmark. An underweight to electric utilities and airports detracted from performance while an overweight to renewable electricity was beneficial. During the fiscal year, the Fund used index futures contracts to equitize the Fund’s cash and this strategy performed as intended. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B1070"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class C MSCI World Index (Net ) Footnote Reference S& P ® 2014 10,000 10,000 10,000 2015 9,577 10,177 9,371 2016 10,022 10,298 9,871 2017 11,449 12,643 11,501 2018 10,564 12,789 10,529 2019 12,639 14,413 12,629 2020 10,965 15,042 10,508 2021 13,667 21,122 13,443 2022 12,755 17,219 12,714 2023 12,354 19,024 12,430 2024 15,636 25,431 16,409 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class C 26.57% 4.35% 4.57% MSCI World Index (Net ) Footnote Reference 33.68% 12.03% 9.78% S& P ® 32.01% 5.38% 5.08% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 342,101,000 |
| Holdings Count | Holding | 135 |
| Advisory Fees Paid, Amount | $ 3,090,000 |
| InvestmentCompanyPortfolioTurnover | 67% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $342,101 Total Number of Portfolio Holdings 135 Total Advisory Fees Paid (thousands) $3,090 Portfolio Turnover Rate 67% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 0.4% Short-Term Investments 2.7% Common Stocks 96.9% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 1.25% to (i) 0.85% on the first $1 billion; (ii) 0.81% on the next $2 billion; (iii) 0.78% on the next $3 billion; and (iv) 0.76% in excess of $6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.85% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.83% on an annual basis. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 1.25% to (i) 0.85% on the first $1 billion; (ii) 0.81% on the next $2 billion; (iii) 0.78% on the next $3 billion; and (iv) 0.76% in excess of $6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.85% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.83% on an annual basis. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000178385 | |
| Shareholder Report [Line Items] | |
| Fund Name | Global Infrastructure Fund |
| Class Name | Class M |
| Trading Symbol | RGFTX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class M $105 0.92% |
| Expenses Paid, Amount | $ 105 |
| Expense Ratio, Percent | 0.92% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? For the fiscal year, the global infrastructure market modestly underperformed broader global equities. Within the global infrastructure sector, energy infrastructure was the top performing category. Utilities followed closely, led by electric utilities, benefiting from anticipated U.S. Federal Reserve rate cuts, expected increases in electricity demand and a shift towards defensive assets due to economic growth concerns. Transports, including the airports and seaports sectors, finished slightly behind the Fund’s secondary benchmark, but still experienced strong performance. The Fund underperformed its secondary benchmark during the period. Negative security selection among electric utilities had the largest impact on performance. Out-of-index exposure to freight rail further detracted. An underweight to airports and favorable security selection among seaports was beneficial. Money manager performance was mixed for the fiscal year, with two managers hindered by unfavorable stock selection in the electric utilities sector and one manager benefiting from positive security selection in the energy infrastructure and seaport sectors. Russell Investment Management, LLC’s (“RIM”) positioning strategy, which implemented sector tilting through the purchase of infrastructure stocks, underperformed the Fund’s secondary benchmark. An underweight to electric utilities and airports detracted from performance while an overweight to renewable electricity was beneficial. During the fiscal year, the Fund used index futures contracts to equitize the Fund’s cash and this strategy performed as intended. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B1100"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class M Footnote Reference MSCI World Index (Net ) Footnote Reference S& P ® 2014 10,000 10,000 10,000 2015 9,675 10,177 9,371 2016 10,225 10,298 9,871 2017 11,809 12,643 11,501 2018 11,010 12,789 10,529 2019 13,302 14,413 12,629 2020 11,682 15,042 10,508 2021 14,709 21,122 13,443 2022 13,870 17,219 12,714 2023 13,610 19,024 12,430 2024 17,386 25,431 16,409 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class M Footnote Reference 27.74% 5.50% 5.69% MSCI World Index (Net ) Footnote Reference 33.68% 12.03% 9.78% S& P ® 32.01% 5.38% 5.08% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 342,101,000 |
| Holdings Count | Holding | 135 |
| Advisory Fees Paid, Amount | $ 3,090,000 |
| InvestmentCompanyPortfolioTurnover | 67% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $342,101 Total Number of Portfolio Holdings 135 Total Advisory Fees Paid (thousands) $3,090 Portfolio Turnover Rate 67% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 0.4% Short-Term Investments 2.7% Common Stocks 96.9% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 1.25% to (i) 0.85% on the first $1 billion; (ii) 0.81% on the next $2 billion; (iii) 0.78% on the next $3 billion; and (iv) 0.76% in excess of $6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.85% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.83% on an annual basis. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 1.25% to (i) 0.85% on the first $1 billion; (ii) 0.81% on the next $2 billion; (iii) 0.78% on the next $3 billion; and (iv) 0.76% in excess of $6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.85% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.83% on an annual basis. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000089837 | |
| Shareholder Report [Line Items] | |
| Fund Name | Global Infrastructure Fund |
| Class Name | Class S |
| Trading Symbol | RGISX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class S $116 1.02% |
| Expenses Paid, Amount | $ 116 |
| Expense Ratio, Percent | 1.02% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? For the fiscal year, the global infrastructure market modestly underperformed broader global equities. Within the global infrastructure sector, energy infrastructure was the top performing category. Utilities followed closely, led by electric utilities, benefiting from anticipated U.S. Federal Reserve rate cuts, expected increases in electricity demand and a shift towards defensive assets due to economic growth concerns. Transports, including the airports and seaports sectors, finished slightly behind the Fund’s secondary benchmark, but still experienced strong performance. The Fund underperformed its secondary benchmark during the period. Negative security selection among electric utilities had the largest impact on performance. Out-of-index exposure to freight rail further detracted. An underweight to airports and favorable security selection among seaports was beneficial. Money manager performance was mixed for the fiscal year, with two managers hindered by unfavorable stock selection in the electric utilities sector and one manager benefiting from positive security selection in the energy infrastructure and seaport sectors. Russell Investment Management, LLC’s (“RIM”) positioning strategy, which implemented sector tilting through the purchase of infrastructure stocks, underperformed the Fund’s secondary benchmark. An underweight to electric utilities and airports detracted from performance while an overweight to renewable electricity was beneficial. During the fiscal year, the Fund used index futures contracts to equitize the Fund’s cash and this strategy performed as intended. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B1130"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class S MSCI World Index (Net ) Footnote Reference S& P ® 2014 10,000 10,000 10,000 2015 9,675 10,177 9,371 2016 10,225 10,298 9,871 2017 11,803 12,643 11,501 2018 10,995 12,789 10,529 2019 13,289 14,413 12,629 2020 11,654 15,042 10,508 2021 14,665 21,122 13,443 2022 13,815 17,219 12,714 2023 13,528 19,024 12,430 2024 17,274 25,431 16,409 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class S 27.69% 5.39% 5.62% MSCI World Index (Net ) Footnote Reference 33.68% 12.03% 9.78% S& P ® 32.01% 5.38% 5.08% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 342,101,000 |
| Holdings Count | Holding | 135 |
| Advisory Fees Paid, Amount | $ 3,090,000 |
| InvestmentCompanyPortfolioTurnover | 67% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $342,101 Total Number of Portfolio Holdings 135 Total Advisory Fees Paid (thousands) $3,090 Portfolio Turnover Rate 67% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 0.4% Short-Term Investments 2.7% Common Stocks 96.9% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 1.25% to (i) 0.85% on the first $1 billion; (ii) 0.81% on the next $2 billion; (iii) 0.78% on the next $3 billion; and (iv) 0.76% in excess of $6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.85% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.83% on an annual basis. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 1.25% to (i) 0.85% on the first $1 billion; (ii) 0.81% on the next $2 billion; (iii) 0.78% on the next $3 billion; and (iv) 0.76% in excess of $6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.85% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.83% on an annual basis. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000089838 | |
| Shareholder Report [Line Items] | |
| Fund Name | Global Infrastructure Fund |
| Class Name | Class Y |
| Trading Symbol | RGIYX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class Y $96 0.84% |
| Expenses Paid, Amount | $ 96 |
| Expense Ratio, Percent | 0.84% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? For the fiscal year, the global infrastructure market modestly underperformed broader global equities. Within the global infrastructure sector, energy infrastructure was the top performing category. Utilities followed closely, led by electric utilities, benefiting from anticipated U.S. Federal Reserve rate cuts, expected increases in electricity demand and a shift towards defensive assets due to economic growth concerns. Transports, including the airports and seaports sectors, finished slightly behind the Fund’s secondary benchmark, but still experienced strong performance. The Fund underperformed its secondary benchmark during the period. Negative security selection among electric utilities had the largest impact on performance. Out-of-index exposure to freight rail further detracted. An underweight to airports and favorable security selection among seaports was beneficial. Money manager performance was mixed for the fiscal year, with two managers hindered by unfavorable stock selection in the electric utilities sector and one manager benefiting from positive security selection in the energy infrastructure and seaport sectors. Russell Investment Management, LLC’s (“RIM”) positioning strategy, which implemented sector tilting through the purchase of infrastructure stocks, underperformed the Fund’s secondary benchmark. An underweight to electric utilities and airports detracted from performance while an overweight to renewable electricity was beneficial. During the fiscal year, the Fund used index futures contracts to equitize the Fund’s cash and this strategy performed as intended. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B1160"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class Y MSCI World Index (Net ) Footnote Reference S& P ® 2014 10,000 10,000 10,000 2015 9,685 10,177 9,371 2016 10,254 10,298 9,871 2017 11,858 12,643 11,501 2018 11,067 12,789 10,529 2019 13,389 14,413 12,629 2020 11,760 15,042 10,508 2021 14,825 21,122 13,443 2022 13,995 17,219 12,714 2023 13,727 19,024 12,430 2024 17,556 25,431 16,409 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class Y 27.89% 5.57% 5.79% MSCI World Index (Net ) Footnote Reference 33.68% 12.03% 9.78% S& P ® 32.01% 5.38% 5.08% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 342,101,000 |
| Holdings Count | Holding | 135 |
| Advisory Fees Paid, Amount | $ 3,090,000 |
| InvestmentCompanyPortfolioTurnover | 67% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $342,101 Total Number of Portfolio Holdings 135 Total Advisory Fees Paid (thousands) $3,090 Portfolio Turnover Rate 67% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 0.4% Short-Term Investments 2.7% Common Stocks 96.9% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 1.25% to (i) 0.85% on the first $1 billion; (ii) 0.81% on the next $2 billion; (iii) 0.78% on the next $3 billion; and (iv) 0.76% in excess of $6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.85% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.83% on an annual basis. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 1.25% to (i) 0.85% on the first $1 billion; (ii) 0.81% on the next $2 billion; (iii) 0.78% on the next $3 billion; and (iv) 0.76% in excess of $6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.85% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.83% on an annual basis. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000043465 | |
| Shareholder Report [Line Items] | |
| Fund Name | Global Real Estate Securities Fund |
| Class Name | Class A |
| Trading Symbol | RREAX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class A $154 1.35% |
| Expenses Paid, Amount | $ 154 |
| Expense Ratio, Percent | 1.35% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? For the fiscal year, the global real estate market underperformed relative to broader global equities. U.S. property markets stood out as the strongest performers, particularly office and mall REITs. Healthcare REITs also showed resilience, benefiting from long-term growth trends associated with an aging population. Data centers also outperformed, driven by increasing demand linked to advancements in artificial intelligence. In Europe, real estate securities showed strength, whereas property stocks in Asia lagged. The Fund performed in line with its secondary benchmark during the period. Favorable security selection among U.S. specialty REITs significantly contributed to performance, particularly due to the strong results from Iron Mountain, Inc., which benefitted from excitement surrounding its data center business. Stock selection within Australia was also beneficial. An underweight to U.S. storage REITs has a marginally negative impact. Both of the Fund’s money managers demonstrated strong performance during the period, with favorable stock selection in U.S. specialty and office REITs, Australian real estate securities and an overweight position in U.S. specialty REITs driving outperformance. Russell Investment Management, LLC’s (“RIM”) positioning strategy, which implemented sector tilting through the purchase of real estate stocks, outperformed the Fund’s secondary benchmark. An overweight to the storage sector was additive, while an underweight to malls detracted from performance. During the fiscal year, the Fund used index futures contracts to equitize the Fund’s cash and this strategy performed as intended. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B1190"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class A MSCI World Index (Net ) Footnote Reference FTSE EPRA Nareit Developed Index (Net) 2014 9,425 10,000 10,000 2015 9,634 10,177 10,184 2016 9,675 10,298 10,437 2017 10,265 12,643 11,075 2018 10,353 12,789 11,108 2019 12,373 14,413 13,362 2020 10,024 15,042 10,298 2021 13,992 21,122 14,635 2022 10,234 17,219 10,984 2023 9,796 19,024 10,322 2024 12,532 25,431 13,260 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class A - with sales charge 20.58% (0.93)% 2.28% Class A - no sales charge 27.93% 0.25% 2.89% MSCI World Index (Net ) Footnote Reference 33.68% 12.03% 9.78% FTSE EPRA Nareit Developed Index (Net) 28.46% (0.15)% 2.86% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 407,877,000 |
| Holdings Count | Holding | 136 |
| Advisory Fees Paid, Amount | $ 3,204,000 |
| InvestmentCompanyPortfolioTurnover | 70% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $407,877 Total Number of Portfolio Holdings 136 Total Advisory Fees Paid (thousands) $3,204 Portfolio Turnover Rate 70% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 0.2% Short-Term Investments 2.7% Common Stocks 97.1% |
| Material Fund Change [Text Block] | Material Fund Changes Until February 29, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.75%. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.72%. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Until February 29, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.75%. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.72%. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000004270 | |
| Shareholder Report [Line Items] | |
| Fund Name | Global Real Estate Securities Fund |
| Class Name | Class C |
| Trading Symbol | RRSCX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class C $238 2.10% |
| Expenses Paid, Amount | $ 238 |
| Expense Ratio, Percent | 2.10% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? For the fiscal year, the global real estate market underperformed relative to broader global equities. U.S. property markets stood out as the strongest performers, particularly office and mall REITs. Healthcare REITs also showed resilience, benefiting from long-term growth trends associated with an aging population. Data centers also outperformed, driven by increasing demand linked to advancements in artificial intelligence. In Europe, real estate securities showed strength, whereas property stocks in Asia lagged. The Fund performed in line with its secondary benchmark during the period. Favorable security selection among U.S. specialty REITs significantly contributed to performance, particularly due to the strong results from Iron Mountain, Inc., which benefitted from excitement surrounding its data center business. Stock selection within Australia was also beneficial. An underweight to U.S. storage REITs has a marginally negative impact. Both of the Fund’s money managers demonstrated strong performance during the period, with favorable stock selection in U.S. specialty and office REITs, Australian real estate securities and an overweight position in U.S. specialty REITs driving outperformance. Russell Investment Management, LLC’s (“RIM”) positioning strategy, which implemented sector tilting through the purchase of real estate stocks, outperformed the Fund’s secondary benchmark. An overweight to the storage sector was additive, while an underweight to malls detracted from performance. During the fiscal year, the Fund used index futures contracts to equitize the Fund’s cash and this strategy performed as intended. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B1220"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class C MSCI World Index (Net ) Footnote Reference FTSE EPRA Nareit Developed Index (Net) 2014 10,000 10,000 10,000 2015 10,146 10,177 10,184 2016 10,114 10,298 10,437 2017 10,649 12,643 11,075 2018 10,659 12,789 11,108 2019 12,648 14,413 13,362 2020 10,166 15,042 10,298 2021 14,086 21,122 14,635 2022 10,223 17,219 10,984 2023 9,715 19,024 10,322 2024 12,333 25,431 13,260 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class C 26.94% (0.50)% 2.12% MSCI World Index (Net ) Footnote Reference 33.68% 12.03% 9.78% FTSE EPRA Nareit Developed Index (Net) 28.46% (0.15)% 2.86% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 407,877,000 |
| Holdings Count | Holding | 136 |
| Advisory Fees Paid, Amount | $ 3,204,000 |
| InvestmentCompanyPortfolioTurnover | 70% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $407,877 Total Number of Portfolio Holdings 136 Total Advisory Fees Paid (thousands) $3,204 Portfolio Turnover Rate 70% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 0.2% Short-Term Investments 2.7% Common Stocks 97.1% |
| Material Fund Change [Text Block] | Material Fund Changes Until February 29, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.75%. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.72%. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Until February 29, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.75%. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.72%. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000178325 | |
| Shareholder Report [Line Items] | |
| Fund Name | Global Real Estate Securities Fund |
| Class Name | Class M |
| Trading Symbol | RETTX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class M $114 1.00% |
| Expenses Paid, Amount | $ 114 |
| Expense Ratio, Percent | 1% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? For the fiscal year, the global real estate market underperformed relative to broader global equities. U.S. property markets stood out as the strongest performers, particularly office and mall REITs. Healthcare REITs also showed resilience, benefiting from long-term growth trends associated with an aging population. Data centers also outperformed, driven by increasing demand linked to advancements in artificial intelligence. In Europe, real estate securities showed strength, whereas property stocks in Asia lagged. The Fund performed in line with its secondary benchmark during the period. Favorable security selection among U.S. specialty REITs significantly contributed to performance, particularly due to the strong results from Iron Mountain, Inc., which benefitted from excitement surrounding its data center business. Stock selection within Australia was also beneficial. An underweight to U.S. storage REITs has a marginally negative impact. Both of the Fund’s money managers demonstrated strong performance during the period, with favorable stock selection in U.S. specialty and office REITs, Australian real estate securities and an overweight position in U.S. specialty REITs driving outperformance. Russell Investment Management, LLC’s (“RIM”) positioning strategy, which implemented sector tilting through the purchase of real estate stocks, outperformed the Fund’s secondary benchmark. An overweight to the storage sector was additive, while an underweight to malls detracted from performance. During the fiscal year, the Fund used index futures contracts to equitize the Fund’s cash and this strategy performed as intended. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B1250"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class M Footnote Reference MSCI World Index (Net ) Footnote Reference FTSE EPRA Nareit Developed Index (Net) 2014 10,000 10,000 10,000 2015 10,251 10,177 10,184 2016 10,320 10,298 10,437 2017 10,981 12,643 11,075 2018 11,114 12,789 11,108 2019 13,331 14,413 13,362 2020 10,837 15,042 10,298 2021 15,179 21,122 14,635 2022 11,138 17,219 10,984 2023 10,700 19,024 10,322 2024 13,738 25,431 13,260 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class M Footnote Reference 28.39% 0.60% 3.23% MSCI World Index (Net ) Footnote Reference 33.68% 12.03% 9.78% FTSE EPRA Nareit Developed Index (Net) 28.46% (0.15)% 2.86% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 407,877,000 |
| Holdings Count | Holding | 136 |
| Advisory Fees Paid, Amount | $ 3,204,000 |
| InvestmentCompanyPortfolioTurnover | 70% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $407,877 Total Number of Portfolio Holdings 136 Total Advisory Fees Paid (thousands) $3,204 Portfolio Turnover Rate 70% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 0.2% Short-Term Investments 2.7% Common Stocks 97.1% |
| Material Fund Change [Text Block] | Material Fund Changes Until February 29, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.75%. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.72%. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Until February 29, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.75%. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.72%. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000166197 | |
| Shareholder Report [Line Items] | |
| Fund Name | Global Real Estate Securities Fund |
| Class Name | Class R6 |
| Trading Symbol | RRSRX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class R6 $106 0.93% |
| Expenses Paid, Amount | $ 106 |
| Expense Ratio, Percent | 0.93% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? For the fiscal year, the global real estate market underperformed relative to broader global equities. U.S. property markets stood out as the strongest performers, particularly office and mall REITs. Healthcare REITs also showed resilience, benefiting from long-term growth trends associated with an aging population. Data centers also outperformed, driven by increasing demand linked to advancements in artificial intelligence. In Europe, real estate securities showed strength, whereas property stocks in Asia lagged. The Fund performed in line with its secondary benchmark during the period. Favorable security selection among U.S. specialty REITs significantly contributed to performance, particularly due to the strong results from Iron Mountain, Inc., which benefitted from excitement surrounding its data center business. Stock selection within Australia was also beneficial. An underweight to U.S. storage REITs has a marginally negative impact. Both of the Fund’s money managers demonstrated strong performance during the period, with favorable stock selection in U.S. specialty and office REITs, Australian real estate securities and an overweight position in U.S. specialty REITs driving outperformance. Russell Investment Management, LLC’s (“RIM”) positioning strategy, which implemented sector tilting through the purchase of real estate stocks, outperformed the Fund’s secondary benchmark. An overweight to the storage sector was additive, while an underweight to malls detracted from performance. During the fiscal year, the Fund used index futures contracts to equitize the Fund’s cash and this strategy performed as intended. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B1280"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class R6 Footnote Reference MSCI World Index (Net ) Footnote Reference FTSE EPRA Nareit Developed Index (Net) 2014 10,000 10,000 10,000 2015 10,269 10,177 10,184 2016 10,360 10,298 10,437 2017 11,036 12,643 11,075 2018 11,179 12,789 11,108 2019 13,418 14,413 13,362 2020 10,915 15,042 10,298 2021 15,299 21,122 14,635 2022 11,236 17,219 10,984 2023 10,805 19,024 10,322 2024 13,876 25,431 13,260 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class R6 Footnote Reference 28.42% 0.67% 3.33% MSCI World Index (Net ) Footnote Reference 33.68% 12.03% 9.78% FTSE EPRA Nareit Developed Index (Net) 28.46% (0.15)% 2.86% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 407,877,000 |
| Holdings Count | Holding | 136 |
| Advisory Fees Paid, Amount | $ 3,204,000 |
| InvestmentCompanyPortfolioTurnover | 70% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $407,877 Total Number of Portfolio Holdings 136 Total Advisory Fees Paid (thousands) $3,204 Portfolio Turnover Rate 70% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 0.2% Short-Term Investments 2.7% Common Stocks 97.1% |
| Material Fund Change [Text Block] | Material Fund Changes Until February 29, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.75%. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.72%. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Until February 29, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.75%. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.72%. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000004269 | |
| Shareholder Report [Line Items] | |
| Fund Name | Global Real Estate Securities Fund |
| Class Name | Class S |
| Trading Symbol | RRESX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class S $126 1.10% |
| Expenses Paid, Amount | $ 126 |
| Expense Ratio, Percent | 1.10% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? For the fiscal year, the global real estate market underperformed relative to broader global equities. U.S. property markets stood out as the strongest performers, particularly office and mall REITs. Healthcare REITs also showed resilience, benefiting from long-term growth trends associated with an aging population. Data centers also outperformed, driven by increasing demand linked to advancements in artificial intelligence. In Europe, real estate securities showed strength, whereas property stocks in Asia lagged. The Fund performed in line with its secondary benchmark during the period. Favorable security selection among U.S. specialty REITs significantly contributed to performance, particularly due to the strong results from Iron Mountain, Inc., which benefitted from excitement surrounding its data center business. Stock selection within Australia was also beneficial. An underweight to U.S. storage REITs has a marginally negative impact. Both of the Fund’s money managers demonstrated strong performance during the period, with favorable stock selection in U.S. specialty and office REITs, Australian real estate securities and an overweight position in U.S. specialty REITs driving outperformance. Russell Investment Management, LLC’s (“RIM”) positioning strategy, which implemented sector tilting through the purchase of real estate stocks, outperformed the Fund’s secondary benchmark. An overweight to the storage sector was additive, while an underweight to malls detracted from performance. During the fiscal year, the Fund used index futures contracts to equitize the Fund’s cash and this strategy performed as intended. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B1310"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class S MSCI World Index (Net ) Footnote Reference FTSE EPRA Nareit Developed Index (Net) 2014 10,000 10,000 10,000 2015 10,251 10,177 10,184 2016 10,320 10,298 10,437 2017 10,973 12,643 11,075 2018 11,096 12,789 11,108 2019 13,297 14,413 13,362 2020 10,800 15,042 10,298 2021 15,109 21,122 14,635 2022 11,079 17,219 10,984 2023 10,635 19,024 10,322 2024 13,636 25,431 13,260 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class S 28.22% 0.51% 3.15% MSCI World Index (Net ) Footnote Reference 33.68% 12.03% 9.78% FTSE EPRA Nareit Developed Index (Net) 28.46% (0.15)% 2.86% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 407,877,000 |
| Holdings Count | Holding | 136 |
| Advisory Fees Paid, Amount | $ 3,204,000 |
| InvestmentCompanyPortfolioTurnover | 70% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $407,877 Total Number of Portfolio Holdings 136 Total Advisory Fees Paid (thousands) $3,204 Portfolio Turnover Rate 70% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 0.2% Short-Term Investments 2.7% Common Stocks 97.1% |
| Material Fund Change [Text Block] | Material Fund Changes Until February 29, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.75%. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.72%. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Until February 29, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.75%. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.72%. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000066901 | |
| Shareholder Report [Line Items] | |
| Fund Name | Global Real Estate Securities Fund |
| Class Name | Class Y |
| Trading Symbol | RREYX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class Y $103 0.90% |
| Expenses Paid, Amount | $ 103 |
| Expense Ratio, Percent | 0.90% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? For the fiscal year, the global real estate market underperformed relative to broader global equities. U.S. property markets stood out as the strongest performers, particularly office and mall REITs. Healthcare REITs also showed resilience, benefiting from long-term growth trends associated with an aging population. Data centers also outperformed, driven by increasing demand linked to advancements in artificial intelligence. In Europe, real estate securities showed strength, whereas property stocks in Asia lagged. The Fund performed in line with its secondary benchmark during the period. Favorable security selection among U.S. specialty REITs significantly contributed to performance, particularly due to the strong results from Iron Mountain, Inc., which benefitted from excitement surrounding its data center business. Stock selection within Australia was also beneficial. An underweight to U.S. storage REITs has a marginally negative impact. Both of the Fund’s money managers demonstrated strong performance during the period, with favorable stock selection in U.S. specialty and office REITs, Australian real estate securities and an overweight position in U.S. specialty REITs driving outperformance. Russell Investment Management, LLC’s (“RIM”) positioning strategy, which implemented sector tilting through the purchase of real estate stocks, outperformed the Fund’s secondary benchmark. An overweight to the storage sector was additive, while an underweight to malls detracted from performance. During the fiscal year, the Fund used index futures contracts to equitize the Fund’s cash and this strategy performed as intended. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B1340"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class Y MSCI World Index (Net ) Footnote Reference FTSE EPRA Nareit Developed Index (Net) 2014 10,000 10,000 10,000 2015 10,269 10,177 10,184 2016 10,359 10,298 10,437 2017 11,037 12,643 11,075 2018 11,183 12,789 11,108 2019 13,428 14,413 13,362 2020 10,926 15,042 10,298 2021 15,319 21,122 14,635 2022 11,253 17,219 10,984 2023 10,823 19,024 10,322 2024 13,903 25,431 13,260 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years 10 Years Class Y 28.46% 0.70% 3.35% MSCI World Index (Net ) Footnote Reference 33.68% 12.03% 9.78% FTSE EPRA Nareit Developed Index (Net) 28.46% (0.15)% 2.86% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 407,877,000 |
| Holdings Count | Holding | 136 |
| Advisory Fees Paid, Amount | $ 3,204,000 |
| InvestmentCompanyPortfolioTurnover | 70% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $407,877 Total Number of Portfolio Holdings 136 Total Advisory Fees Paid (thousands) $3,204 Portfolio Turnover Rate 70% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 0.2% Short-Term Investments 2.7% Common Stocks 97.1% |
| Material Fund Change [Text Block] | Material Fund Changes Until February 29, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.75%. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.72%. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Until February 29, 2024, RIM contractually agreed to a fee waiver that resulted in an effective annual advisory fee not to exceed 0.75%. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.72%. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000152724 | |
| Shareholder Report [Line Items] | |
| Fund Name | Multi-Strategy Income Fund |
| Class Name | Class A |
| Trading Symbol | RMYAX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class A $111 1.01% |
| Expenses Paid, Amount | $ 111 |
| Expense Ratio, Percent | 1.01% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? The fiscal year saw heightened volatility as conflicting economic data and central bank policy affected investor sentiment. Initially, central banks raised or maintained interest rates as economic data remained resilient; however, in the second half of the year, moderating inflation and slowing growth prompted central banks to deliver the first interest rate cuts since the pandemic. Equities outperformed fixed income, with equity rallies differentiated across global markets. In the U.S., artificial intelligence (“AI”) and market concentration within large-cap names drove outperformance. Fixed income markets were affected by restrictive monetary policy but delivered positive returns over the fiscal year. Lower quality, higher yielding credit posted greater returns than the aggregate fixed income index as credit spreads remained tight. The Fund outperformed its secondary benchmark for the fiscal year. Security selection had a mixed impact on benchmark-relative performance, with some money managers contributing positively and some negatively. Active management of the Fund’s duration positioning was a notable positive contributor. Russell Investment Management, LLC’s (“RIM”) positioning strategy, which sought to control Fund-level exposures and risks through the purchase of a stock portfolio providing exposure to value, quality and low volatility factors, contributed positively to benchmark-relative performance. During the fiscal year, RIM used equity and fixed income derivatives, such as futures and options, to seek to maintain tactical asset allocation preferences and implement risk-mitigation strategies and these instruments performed as intended. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B1370"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class A Bloomberg U.S. Aggregate Bond Index Footnote Reference Multi-Strategy Income Composite Index Footnote Reference 30% FTSE All-World/70% FTSE U.S. Broad Investment Grade Composite Index 5/1/2015 9,425 10,000 10,000 10,000 2015 9,104 10,023 9,732 9,876 2016 9,567 10,461 10,330 10,277 2017 10,488 10,555 11,261 11,029 2018 10,312 10,339 11,127 10,882 2019 10,938 11,528 12,566 12,233 2020 10,496 12,242 12,324 13,030 2021 12,534 12,183 14,016 14,339 2022 10,202 10,273 11,919 11,926 2023 10,744 10,309 12,384 12,350 2024 12,798 11,396 14,611 14,459 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years Since Inception Class A - with sales charge 12.25% 1.98% 2.63% Class A - no sales charge 19.12% 3.19% 3.27% Bloomberg U.S. Aggregate Bond Index Footnote Reference 10.55% (0.23)% 1.39% Multi-Strategy Income Composite Index Footnote Reference 17.98% 3.06% 4.07% 30% FTSE All-World/70% FTSE U.S. Broad Investment Grade Composite Index 17.08% 3.40% 3.96% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 318,105,000 |
| Holdings Count | Holding | 1,539 |
| Advisory Fees Paid, Amount | $ 1,925,000 |
| InvestmentCompanyPortfolioTurnover | 88% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $318,105 Total Number of Portfolio Holdings 1,539 Total Advisory Fees Paid (thousands) $1,925 Portfolio Turnover Rate 88% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 3.9% Preferred Stocks 1.8% Short-Term Investments 9.0% Long-Term Investments 33.8% Common Stocks 51.5% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.75% to (i) 0.53% on the first $1 billion; (ii) 0.49% on the next $2 billion; (iii) 0.46% on the next $3 billion; and (iv) 0.44% in excess of $6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.57% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.36%. In September 2024, RIM terminated Sompo Asset Management as a money manager for the Fund and hired Algert Global LLC as a money manager for the Fund. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.75% to (i) 0.53% on the first $1 billion; (ii) 0.49% on the next $2 billion; (iii) 0.46% on the next $3 billion; and (iv) 0.44% in excess of $6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.57% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.36%. |
| Material Fund Change Adviser [Text Block] | In September 2024, RIM terminated Sompo Asset Management as a money manager for the Fund and hired Algert Global LLC as a money manager for the Fund. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000152725 | |
| Shareholder Report [Line Items] | |
| Fund Name | Multi-Strategy Income Fund |
| Class Name | Class C |
| Trading Symbol | RMYCX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class C $192 1.76% |
| Expenses Paid, Amount | $ 192 |
| Expense Ratio, Percent | 1.76% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? The fiscal year saw heightened volatility as conflicting economic data and central bank policy affected investor sentiment. Initially, central banks raised or maintained interest rates as economic data remained resilient; however, in the second half of the year, moderating inflation and slowing growth prompted central banks to deliver the first interest rate cuts since the pandemic. Equities outperformed fixed income, with equity rallies differentiated across global markets. In the U.S., artificial intelligence (“AI”) and market concentration within large-cap names drove outperformance. Fixed income markets were affected by restrictive monetary policy but delivered positive returns over the fiscal year. Lower quality, higher yielding credit posted greater returns than the aggregate fixed income index as credit spreads remained tight. The Fund outperformed its secondary benchmark for the fiscal year. Security selection had a mixed impact on benchmark-relative performance, with some money managers contributing positively and some negatively. Active management of the Fund’s duration positioning was a notable positive contributor. Russell Investment Management, LLC’s (“RIM”) positioning strategy, which sought to control Fund-level exposures and risks through the purchase of a stock portfolio providing exposure to value, quality and low volatility factors, contributed positively to benchmark-relative performance. During the fiscal year, RIM used equity and fixed income derivatives, such as futures and options, to seek to maintain tactical asset allocation preferences and implement risk-mitigation strategies and these instruments performed as intended. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B1401"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class C Bloomberg U.S. Aggregate Bond Index Footnote Reference Multi-Strategy Income Composite Index Footnote Reference 30% FTSE All-World/70% FTSE U.S. Broad Investment Grade Composite Index 5/1/2015 10,000 10,000 10,000 10,000 2015 9,629 10,023 9,732 9,876 2016 10,047 10,461 10,330 10,277 2017 10,924 10,555 11,261 11,029 2018 10,653 10,339 11,127 10,882 2019 11,227 11,528 12,566 12,233 2020 10,687 12,242 12,324 13,030 2021 12,672 12,183 14,016 14,339 2022 10,230 10,273 11,919 11,926 2023 10,701 10,309 12,384 12,350 2024 12,643 11,396 14,611 14,459 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years Since Inception Class C 18.15% 2.40% 2.50% Bloomberg U.S. Aggregate Bond Index Footnote Reference 10.55% (0.23)% 1.39% Multi-Strategy Income Composite Index Footnote Reference 17.98% 3.06% 4.07% 30% FTSE All-World/70% FTSE U.S. Broad Investment Grade Composite Index 17.08% 3.40% 3.96% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 318,105,000 |
| Holdings Count | Holding | 1,539 |
| Advisory Fees Paid, Amount | $ 1,925,000 |
| InvestmentCompanyPortfolioTurnover | 88% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $318,105 Total Number of Portfolio Holdings 1,539 Total Advisory Fees Paid (thousands) $1,925 Portfolio Turnover Rate 88% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 3.9% Preferred Stocks 1.8% Short-Term Investments 9.0% Long-Term Investments 33.8% Common Stocks 51.5% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.75% to (i) 0.53% on the first $1 billion; (ii) 0.49% on the next $2 billion; (iii) 0.46% on the next $3 billion; and (iv) 0.44% in excess of $6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.57% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.36%. In September 2024, RIM terminated Sompo Asset Management as a money manager for the Fund and hired Algert Global LLC as a money manager for the Fund. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.75% to (i) 0.53% on the first $1 billion; (ii) 0.49% on the next $2 billion; (iii) 0.46% on the next $3 billion; and (iv) 0.44% in excess of $6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.57% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.36%. |
| Material Fund Change Adviser [Text Block] | In September 2024, RIM terminated Sompo Asset Management as a money manager for the Fund and hired Algert Global LLC as a money manager for the Fund. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000178428 | |
| Shareholder Report [Line Items] | |
| Fund Name | Multi-Strategy Income Fund |
| Class Name | Class M |
| Trading Symbol | RGYTX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class M $72 0.66% |
| Expenses Paid, Amount | $ 72 |
| Expense Ratio, Percent | 0.66% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? The fiscal year saw heightened volatility as conflicting economic data and central bank policy affected investor sentiment. Initially, central banks raised or maintained interest rates as economic data remained resilient; however, in the second half of the year, moderating inflation and slowing growth prompted central banks to deliver the first interest rate cuts since the pandemic. Equities outperformed fixed income, with equity rallies differentiated across global markets. In the U.S., artificial intelligence (“AI”) and market concentration within large-cap names drove outperformance. Fixed income markets were affected by restrictive monetary policy but delivered positive returns over the fiscal year. Lower quality, higher yielding credit posted greater returns than the aggregate fixed income index as credit spreads remained tight. The Fund outperformed its secondary benchmark for the fiscal year. Security selection had a mixed impact on benchmark-relative performance, with some money managers contributing positively and some negatively. Active management of the Fund’s duration positioning was a notable positive contributor. Russell Investment Management, LLC’s (“RIM”) positioning strategy, which sought to control Fund-level exposures and risks through the purchase of a stock portfolio providing exposure to value, quality and low volatility factors, contributed positively to benchmark-relative performance. During the fiscal year, RIM used equity and fixed income derivatives, such as futures and options, to seek to maintain tactical asset allocation preferences and implement risk-mitigation strategies and these instruments performed as intended. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B1432"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class M Footnote Reference Bloomberg U.S. Aggregate Bond Index Footnote Reference Multi-Strategy Income Composite Index Footnote Reference 30% FTSE All-World/70% FTSE U.S. Broad Investment Grade Composite Index 5/1/2015 10,000 10,000 10,000 10,000 2015 9,673 10,023 9,732 9,876 2016 10,198 10,461 10,330 10,277 2017 11,207 10,555 11,261 11,029 2018 11,051 10,339 11,127 10,882 2019 11,778 11,528 12,566 12,233 2020 11,337 12,242 12,324 13,030 2021 13,583 12,183 14,016 14,339 2022 11,092 10,273 11,919 11,926 2023 11,734 10,309 12,384 12,350 2024 14,015 11,396 14,611 14,459 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years Since Inception Class M Footnote Reference 19.44% 3.54% 3.62% Bloomberg U.S. Aggregate Bond Index Footnote Reference 10.55% (0.23)% 1.39% Multi-Strategy Income Composite Index Footnote Reference 17.98% 3.06% 4.07% 30% FTSE All-World/70% FTSE U.S. Broad Investment Grade Composite Index 17.08% 3.40% 3.96% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 318,105,000 |
| Holdings Count | Holding | 1,539 |
| Advisory Fees Paid, Amount | $ 1,925,000 |
| InvestmentCompanyPortfolioTurnover | 88% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $318,105 Total Number of Portfolio Holdings 1,539 Total Advisory Fees Paid (thousands) $1,925 Portfolio Turnover Rate 88% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 3.9% Preferred Stocks 1.8% Short-Term Investments 9.0% Long-Term Investments 33.8% Common Stocks 51.5% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.75% to (i) 0.53% on the first $1 billion; (ii) 0.49% on the next $2 billion; (iii) 0.46% on the next $3 billion; and (iv) 0.44% in excess of $6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.57% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.36%. In September 2024, RIM terminated Sompo Asset Management as a money manager for the Fund and hired Algert Global LLC as a money manager for the Fund. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.75% to (i) 0.53% on the first $1 billion; (ii) 0.49% on the next $2 billion; (iii) 0.46% on the next $3 billion; and (iv) 0.44% in excess of $6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.57% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.36%. |
| Material Fund Change Adviser [Text Block] | In September 2024, RIM terminated Sompo Asset Management as a money manager for the Fund and hired Algert Global LLC as a money manager for the Fund. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000152727 | |
| Shareholder Report [Line Items] | |
| Fund Name | Multi-Strategy Income Fund |
| Class Name | Class S |
| Trading Symbol | RMYSX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class S $83 0.76% |
| Expenses Paid, Amount | $ 83 |
| Expense Ratio, Percent | 0.76% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? The fiscal year saw heightened volatility as conflicting economic data and central bank policy affected investor sentiment. Initially, central banks raised or maintained interest rates as economic data remained resilient; however, in the second half of the year, moderating inflation and slowing growth prompted central banks to deliver the first interest rate cuts since the pandemic. Equities outperformed fixed income, with equity rallies differentiated across global markets. In the U.S., artificial intelligence (“AI”) and market concentration within large-cap names drove outperformance. Fixed income markets were affected by restrictive monetary policy but delivered positive returns over the fiscal year. Lower quality, higher yielding credit posted greater returns than the aggregate fixed income index as credit spreads remained tight. The Fund outperformed its secondary benchmark for the fiscal year. Security selection had a mixed impact on benchmark-relative performance, with some money managers contributing positively and some negatively. Active management of the Fund’s duration positioning was a notable positive contributor. Russell Investment Management, LLC’s (“RIM”) positioning strategy, which sought to control Fund-level exposures and risks through the purchase of a stock portfolio providing exposure to value, quality and low volatility factors, contributed positively to benchmark-relative performance. During the fiscal year, RIM used equity and fixed income derivatives, such as futures and options, to seek to maintain tactical asset allocation preferences and implement risk-mitigation strategies and these instruments performed as intended. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B1463"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class S Bloomberg U.S. Aggregate Bond Index Footnote Reference Multi-Strategy Income Composite Index Footnote Reference 30% FTSE All-World/70% FTSE U.S. Broad Investment Grade Composite Index 5/1/2015 10,000 10,000 10,000 10,000 2015 9,673 10,023 9,732 9,876 2016 10,198 10,461 10,330 10,277 2017 11,207 10,555 11,261 11,029 2018 11,038 10,339 11,127 10,882 2019 11,748 11,528 12,566 12,233 2020 11,299 12,242 12,324 13,030 2021 13,529 12,183 14,016 14,339 2022 11,036 10,273 11,919 11,926 2023 11,650 10,309 12,384 12,350 2024 13,917 11,396 14,611 14,459 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years Since Inception Class S 19.46% 3.45% 3.54% Bloomberg U.S. Aggregate Bond Index Footnote Reference 10.55% (0.23)% 1.39% Multi-Strategy Income Composite Index Footnote Reference 17.98% 3.06% 4.07% 30% FTSE All-World/70% FTSE U.S. Broad Investment Grade Composite Index 17.08% 3.40% 3.96% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 318,105,000 |
| Holdings Count | Holding | 1,539 |
| Advisory Fees Paid, Amount | $ 1,925,000 |
| InvestmentCompanyPortfolioTurnover | 88% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $318,105 Total Number of Portfolio Holdings 1,539 Total Advisory Fees Paid (thousands) $1,925 Portfolio Turnover Rate 88% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 3.9% Preferred Stocks 1.8% Short-Term Investments 9.0% Long-Term Investments 33.8% Common Stocks 51.5% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.75% to (i) 0.53% on the first $1 billion; (ii) 0.49% on the next $2 billion; (iii) 0.46% on the next $3 billion; and (iv) 0.44% in excess of $6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.57% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.36%. In September 2024, RIM terminated Sompo Asset Management as a money manager for the Fund and hired Algert Global LLC as a money manager for the Fund. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.75% to (i) 0.53% on the first $1 billion; (ii) 0.49% on the next $2 billion; (iii) 0.46% on the next $3 billion; and (iv) 0.44% in excess of $6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.57% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.36%. |
| Material Fund Change Adviser [Text Block] | In September 2024, RIM terminated Sompo Asset Management as a money manager for the Fund and hired Algert Global LLC as a money manager for the Fund. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000152728 | |
| Shareholder Report [Line Items] | |
| Fund Name | Multi-Strategy Income Fund |
| Class Name | Class Y |
| Trading Symbol | RMYYX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class Y $61 0.56% |
| Expenses Paid, Amount | $ 61 |
| Expense Ratio, Percent | 0.56% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? The fiscal year saw heightened volatility as conflicting economic data and central bank policy affected investor sentiment. Initially, central banks raised or maintained interest rates as economic data remained resilient; however, in the second half of the year, moderating inflation and slowing growth prompted central banks to deliver the first interest rate cuts since the pandemic. Equities outperformed fixed income, with equity rallies differentiated across global markets. In the U.S., artificial intelligence (“AI”) and market concentration within large-cap names drove outperformance. Fixed income markets were affected by restrictive monetary policy but delivered positive returns over the fiscal year. Lower quality, higher yielding credit posted greater returns than the aggregate fixed income index as credit spreads remained tight. The Fund outperformed its secondary benchmark for the fiscal year. Security selection had a mixed impact on benchmark-relative performance, with some money managers contributing positively and some negatively. Active management of the Fund’s duration positioning was a notable positive contributor. Russell Investment Management, LLC’s (“RIM”) positioning strategy, which sought to control Fund-level exposures and risks through the purchase of a stock portfolio providing exposure to value, quality and low volatility factors, contributed positively to benchmark-relative performance. During the fiscal year, RIM used equity and fixed income derivatives, such as futures and options, to seek to maintain tactical asset allocation preferences and implement risk-mitigation strategies and these instruments performed as intended. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B1494"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class Y Bloomberg U.S. Aggregate Bond Index Footnote Reference Multi-Strategy Income Composite Index Footnote Reference 30% FTSE All-World/70% FTSE U.S. Broad Investment Grade Composite Index 5/1/2015 10,000 10,000 10,000 10,000 2015 9,691 10,023 9,732 9,876 2016 10,225 10,461 10,330 10,277 2017 11,266 10,555 11,261 11,029 2018 11,119 10,339 11,127 10,882 2019 11,857 11,528 12,566 12,233 2020 11,421 12,242 12,324 13,030 2021 13,699 12,183 14,016 14,339 2022 11,203 10,273 11,919 11,926 2023 11,848 10,309 12,384 12,350 2024 14,176 11,396 14,611 14,459 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years Since Inception Class Y 19.64% 3.64% 3.74% Bloomberg U.S. Aggregate Bond Index Footnote Reference 10.55% (0.23)% 1.39% Multi-Strategy Income Composite Index Footnote Reference 17.98% 3.06% 4.07% 30% FTSE All-World/70% FTSE U.S. Broad Investment Grade Composite Index 17.08% 3.40% 3.96% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 318,105,000 |
| Holdings Count | Holding | 1,539 |
| Advisory Fees Paid, Amount | $ 1,925,000 |
| InvestmentCompanyPortfolioTurnover | 88% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $318,105 Total Number of Portfolio Holdings 1,539 Total Advisory Fees Paid (thousands) $1,925 Portfolio Turnover Rate 88% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 3.9% Preferred Stocks 1.8% Short-Term Investments 9.0% Long-Term Investments 33.8% Common Stocks 51.5% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.75% to (i) 0.53% on the first $1 billion; (ii) 0.49% on the next $2 billion; (iii) 0.46% on the next $3 billion; and (iv) 0.44% in excess of $6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.57% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.36%. In September 2024, RIM terminated Sompo Asset Management as a money manager for the Fund and hired Algert Global LLC as a money manager for the Fund. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.75% to (i) 0.53% on the first $1 billion; (ii) 0.49% on the next $2 billion; (iii) 0.46% on the next $3 billion; and (iv) 0.44% in excess of $6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.57% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.36%. |
| Material Fund Change Adviser [Text Block] | In September 2024, RIM terminated Sompo Asset Management as a money manager for the Fund and hired Algert Global LLC as a money manager for the Fund. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000174738 | |
| Shareholder Report [Line Items] | |
| Fund Name | Multi-Asset Growth Strategy Fund |
| Class Name | Class A |
| Trading Symbol | RAZAX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class A $128 1.15% |
| Expenses Paid, Amount | $ 128 |
| Expense Ratio, Percent | 1.15% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? The fiscal year saw heightened volatility as conflicting economic data and central bank policy affected investor sentiment. Initially, central banks raised or maintained interest rates as economic data remained resilient; however, in the second half of the year, moderating inflation and slowing growth prompted central banks to deliver the first interest rate cuts since the pandemic. Equities outperformed fixed income, with equity rallies differentiated across global markets. In the U.S., artificial intelligence (“AI”) and market concentration within large-cap names drove outperformance. Fixed income markets were affected by restrictive monetary policy but delivered positive returns over the fiscal year. Lower quality, higher yielding credit posted greater returns than the aggregate fixed income index as credit spreads remained tight. The Fund underperformed the Multi-Asset Growth Strategy Composite Index for the fiscal year. Security selection was a negative contributor to benchmark-relative performance, as active managers struggled in a concentrated market driven by AI themes. Active management of the Fund’s duration positioning was a notable positive contributor. Russell Investment Management, LLC’s (“RIM”) positioning strategy, which sought to control Fund-level exposures and risks through the purchase of a stock portfolio providing exposure to value and low volatility factors, contributed positively to benchmark-relative performance. During the fiscal year, RIM used equity and fixed income derivatives, such as futures and options, to seek to maintain tactical asset allocation preferences and implement risk-mitigation strategies and these instruments performed as intended. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B1525"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class A Footnote Reference Russell 1000 ® Index Footnote Reference Multi-Asset Growth Strategy Composite Index Footnote Reference 60% FTSE All-World/40% FTSE U.S. Broad Investment Grade Composite Index 3/7/2017 9,425 10,000 10,000 10,000 2017 9,983 11,006 10,905 10,922 2018 9,691 11,774 10,850 10,842 2019 10,147 13,440 12,197 12,243 2020 9,654 14,901 12,637 13,009 2021 11,491 21,384 15,594 15,782 2022 9,339 17,882 12,790 12,962 2023 10,076 19,578 13,718 13,849 2024 12,302 27,031 17,111 17,134 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years Since Inception Class A - with sales charge Footnote Reference 15.02% 2.70% 2.74% Class A - no sales charge Footnote Reference 22.09% 3.93% 3.54% Russell 1000 ® Index Footnote Reference 38.07% 15.00% 13.88% Multi-Asset Growth Strategy Composite Index Footnote Reference 24.73% 7.01% 7.27% 60% FTSE All-World/40% FTSE U.S. Broad Investment Grade Composite Index 23.72% 6.95% 7.29% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 589,888,000 |
| Holdings Count | Holding | 1,302 |
| Advisory Fees Paid, Amount | $ 4,468,000 |
| InvestmentCompanyPortfolioTurnover | 92% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $589,888 Total Number of Portfolio Holdings 1,302 Total Advisory Fees Paid (thousands) $4,468 Portfolio Turnover Rate 92% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 2.6% Preferred Stocks 0.2% Long-Term Investments 15.7% Short-Term Investments 16.8% Common Stocks 64.7% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.85% to (i) 0.72% on the first $1 billion; (ii) 0.68% on the next $2 billion; (iii) 0.65% on the next $3 billion; and (iv) 0.63% in excess of $ 6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.73% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.54%. In March 2024, RIM hired Calamos Advisors, LLC as a money manager for the Fund. In September 2024, RIM terminated Hermes Investment Limited and Sompo Asset Management as money managers for the Fund and hired Algert Global LLC as a money manager for the Fund. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.85% to (i) 0.72% on the first $1 billion; (ii) 0.68% on the next $2 billion; (iii) 0.65% on the next $3 billion; and (iv) 0.63% in excess of $ 6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.73% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.54%. |
| Material Fund Change Adviser [Text Block] | In March 2024, RIM hired Calamos Advisors, LLC as a money manager for the Fund. In September 2024, RIM terminated Hermes Investment Limited and Sompo Asset Management as money managers for the Fund and hired Algert Global LLC as a money manager for the Fund. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000174739 | |
| Shareholder Report [Line Items] | |
| Fund Name | Multi-Asset Growth Strategy Fund |
| Class Name | Class C |
| Trading Symbol | RAZCX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class C $210 1.90% |
| Expenses Paid, Amount | $ 210 |
| Expense Ratio, Percent | 1.90% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? The fiscal year saw heightened volatility as conflicting economic data and central bank policy affected investor sentiment. Initially, central banks raised or maintained interest rates as economic data remained resilient; however, in the second half of the year, moderating inflation and slowing growth prompted central banks to deliver the first interest rate cuts since the pandemic. Equities outperformed fixed income, with equity rallies differentiated across global markets. In the U.S., artificial intelligence (“AI”) and market concentration within large-cap names drove outperformance. Fixed income markets were affected by restrictive monetary policy but delivered positive returns over the fiscal year. Lower quality, higher yielding credit posted greater returns than the aggregate fixed income index as credit spreads remained tight. The Fund underperformed the Multi-Asset Growth Strategy Composite Index for the fiscal year. Security selection was a negative contributor to benchmark-relative performance, as active managers struggled in a concentrated market driven by AI themes. Active management of the Fund’s duration positioning was a notable positive contributor. Russell Investment Management, LLC’s (“RIM”) positioning strategy, which sought to control Fund-level exposures and risks through the purchase of a stock portfolio providing exposure to value and low volatility factors, contributed positively to benchmark-relative performance. During the fiscal year, RIM used equity and fixed income derivatives, such as futures and options, to seek to maintain tactical asset allocation preferences and implement risk-mitigation strategies and these instruments performed as intended. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B1556"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class C Footnote Reference Russell 1000 ® Index Footnote Reference Multi-Asset Growth Strategy Composite Index Footnote Reference 60% FTSE All-World/40% FTSE U.S. Broad Investment Grade Composite Index 3/7/2017 10,000 10,000 10,000 10,000 2017 10,582 11,006 10,905 10,922 2018 10,195 11,774 10,850 10,842 2019 10,586 13,440 12,197 12,243 2020 9,990 14,901 12,637 13,009 2021 11,799 21,384 15,594 15,782 2022 9,531 17,882 12,790 12,962 2023 10,196 19,578 13,718 13,849 2024 12,351 27,031 17,111 17,134 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years Since Inception Class C Footnote Reference 21.13% 3.13% 2.80% Russell 1000 ® Index Footnote Reference 38.07% 15.00% 13.88% Multi-Asset Growth Strategy Composite Index Footnote Reference 24.73% 7.01% 7.27% 60% FTSE All-World/40% FTSE U.S. Broad Investment Grade Composite Index 23.72% 6.95% 7.29% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 589,888,000 |
| Holdings Count | Holding | 1,302 |
| Advisory Fees Paid, Amount | $ 4,468,000 |
| InvestmentCompanyPortfolioTurnover | 92% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $589,888 Total Number of Portfolio Holdings 1,302 Total Advisory Fees Paid (thousands) $4,468 Portfolio Turnover Rate 92% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 2.6% Preferred Stocks 0.2% Long-Term Investments 15.7% Short-Term Investments 16.8% Common Stocks 64.7% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.85% to (i) 0.72% on the first $1 billion; (ii) 0.68% on the next $2 billion; (iii) 0.65% on the next $3 billion; and (iv) 0.63% in excess of $ 6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.73% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.54%. In March 2024, RIM hired Calamos Advisors, LLC as a money manager for the Fund. In September 2024, RIM terminated Hermes Investment Limited and Sompo Asset Management as money managers for the Fund and hired Algert Global LLC as a money manager for the Fund. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.85% to (i) 0.72% on the first $1 billion; (ii) 0.68% on the next $2 billion; (iii) 0.65% on the next $3 billion; and (iv) 0.63% in excess of $ 6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.73% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.54%. |
| Material Fund Change Adviser [Text Block] | In March 2024, RIM hired Calamos Advisors, LLC as a money manager for the Fund. In September 2024, RIM terminated Hermes Investment Limited and Sompo Asset Management as money managers for the Fund and hired Algert Global LLC as a money manager for the Fund. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000178443 | |
| Shareholder Report [Line Items] | |
| Fund Name | Multi-Asset Growth Strategy Fund |
| Class Name | Class M |
| Trading Symbol | RMATX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class M $89 0.80% |
| Expenses Paid, Amount | $ 89 |
| Expense Ratio, Percent | 0.80% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? The fiscal year saw heightened volatility as conflicting economic data and central bank policy affected investor sentiment. Initially, central banks raised or maintained interest rates as economic data remained resilient; however, in the second half of the year, moderating inflation and slowing growth prompted central banks to deliver the first interest rate cuts since the pandemic. Equities outperformed fixed income, with equity rallies differentiated across global markets. In the U.S., artificial intelligence (“AI”) and market concentration within large-cap names drove outperformance. Fixed income markets were affected by restrictive monetary policy but delivered positive returns over the fiscal year. Lower quality, higher yielding credit posted greater returns than the aggregate fixed income index as credit spreads remained tight. The Fund underperformed the Multi-Asset Growth Strategy Composite Index for the fiscal year. Security selection was a negative contributor to benchmark-relative performance, as active managers struggled in a concentrated market driven by AI themes. Active management of the Fund’s duration positioning was a notable positive contributor. Russell Investment Management, LLC’s (“RIM”) positioning strategy, which sought to control Fund-level exposures and risks through the purchase of a stock portfolio providing exposure to value and low volatility factors, contributed positively to benchmark-relative performance. During the fiscal year, RIM used equity and fixed income derivatives, such as futures and options, to seek to maintain tactical asset allocation preferences and implement risk-mitigation strategies and these instruments performed as intended. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B1587"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class M Footnote Reference Russell 1000 ® Index Footnote Reference Multi-Asset Growth Strategy Composite Index Footnote Reference 60% FTSE All-World/40% FTSE U.S. Broad Investment Grade Composite Index 3/7/2017 10,000 10,000 10,000 10,000 2017 10,605 11,006 10,905 10,922 2018 10,326 11,774 10,850 10,842 2019 10,839 13,440 12,197 12,243 2020 10,357 14,901 12,637 13,009 2021 12,363 21,384 15,594 15,782 2022 10,091 17,882 12,790 12,962 2023 10,921 19,578 13,718 13,849 2024 13,393 27,031 17,111 17,134 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years Since Inception Class M Footnote Reference 22.63% 4.32% 3.89% Russell 1000 ® Index Footnote Reference 38.07% 15.00% 13.88% Multi-Asset Growth Strategy Composite Index Footnote Reference 24.73% 7.01% 7.27% 60% FTSE All-World/40% FTSE U.S. Broad Investment Grade Composite Index 23.72% 6.95% 7.29% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 589,888,000 |
| Holdings Count | Holding | 1,302 |
| Advisory Fees Paid, Amount | $ 4,468,000 |
| InvestmentCompanyPortfolioTurnover | 92% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $589,888 Total Number of Portfolio Holdings 1,302 Total Advisory Fees Paid (thousands) $4,468 Portfolio Turnover Rate 92% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 2.6% Preferred Stocks 0.2% Long-Term Investments 15.7% Short-Term Investments 16.8% Common Stocks 64.7% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.85% to (i) 0.72% on the first $1 billion; (ii) 0.68% on the next $2 billion; (iii) 0.65% on the next $3 billion; and (iv) 0.63% in excess of $ 6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.73% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.54%. In March 2024, RIM hired Calamos Advisors, LLC as a money manager for the Fund. In September 2024, RIM terminated Hermes Investment Limited and Sompo Asset Management as money managers for the Fund and hired Algert Global LLC as a money manager for the Fund. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.85% to (i) 0.72% on the first $1 billion; (ii) 0.68% on the next $2 billion; (iii) 0.65% on the next $3 billion; and (iv) 0.63% in excess of $ 6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.73% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.54%. |
| Material Fund Change Adviser [Text Block] | In March 2024, RIM hired Calamos Advisors, LLC as a money manager for the Fund. In September 2024, RIM terminated Hermes Investment Limited and Sompo Asset Management as money managers for the Fund and hired Algert Global LLC as a money manager for the Fund. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000174742 | |
| Shareholder Report [Line Items] | |
| Fund Name | Multi-Asset Growth Strategy Fund |
| Class Name | Class S |
| Trading Symbol | RMGSX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class S $100 0.90% |
| Expenses Paid, Amount | $ 100 |
| Expense Ratio, Percent | 0.90% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? The fiscal year saw heightened volatility as conflicting economic data and central bank policy affected investor sentiment. Initially, central banks raised or maintained interest rates as economic data remained resilient; however, in the second half of the year, moderating inflation and slowing growth prompted central banks to deliver the first interest rate cuts since the pandemic. Equities outperformed fixed income, with equity rallies differentiated across global markets. In the U.S., artificial intelligence (“AI”) and market concentration within large-cap names drove outperformance. Fixed income markets were affected by restrictive monetary policy but delivered positive returns over the fiscal year. Lower quality, higher yielding credit posted greater returns than the aggregate fixed income index as credit spreads remained tight. The Fund underperformed the Multi-Asset Growth Strategy Composite Index for the fiscal year. Security selection was a negative contributor to benchmark-relative performance, as active managers struggled in a concentrated market driven by AI themes. Active management of the Fund’s duration positioning was a notable positive contributor. Russell Investment Management, LLC’s (“RIM”) positioning strategy, which sought to control Fund-level exposures and risks through the purchase of a stock portfolio providing exposure to value and low volatility factors, contributed positively to benchmark-relative performance. During the fiscal year, RIM used equity and fixed income derivatives, such as futures and options, to seek to maintain tactical asset allocation preferences and implement risk-mitigation strategies and these instruments performed as intended. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B1618"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class S Russell 1000 ® Index Footnote Reference Multi-Asset Growth Strategy Composite Index Footnote Reference 60% FTSE All-World/40% FTSE U.S. Broad Investment Grade Composite Index 3/7/2017 10,000 10,000 10,000 10,000 2017 10,593 11,006 10,905 10,922 2018 10,303 11,774 10,850 10,842 2019 10,813 13,440 12,197 12,243 2020 10,324 14,901 12,637 13,009 2021 12,309 21,384 15,594 15,782 2022 10,037 17,882 12,790 12,962 2023 10,853 19,578 13,718 13,849 2024 13,287 27,031 17,111 17,134 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years Since Inception Class S 22.43% 4.21% 3.78% Russell 1000 ® Index Footnote Reference 38.07% 15.00% 13.88% Multi-Asset Growth Strategy Composite Index Footnote Reference 24.73% 7.01% 7.27% 60% FTSE All-World/40% FTSE U.S. Broad Investment Grade Composite Index 23.72% 6.95% 7.29% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 589,888,000 |
| Holdings Count | Holding | 1,302 |
| Advisory Fees Paid, Amount | $ 4,468,000 |
| InvestmentCompanyPortfolioTurnover | 92% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $589,888 Total Number of Portfolio Holdings 1,302 Total Advisory Fees Paid (thousands) $4,468 Portfolio Turnover Rate 92% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 2.6% Preferred Stocks 0.2% Long-Term Investments 15.7% Short-Term Investments 16.8% Common Stocks 64.7% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.85% to (i) 0.72% on the first $1 billion; (ii) 0.68% on the next $2 billion; (iii) 0.65% on the next $3 billion; and (iv) 0.63% in excess of $ 6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.73% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.54%. In March 2024, RIM hired Calamos Advisors, LLC as a money manager for the Fund. In September 2024, RIM terminated Hermes Investment Limited and Sompo Asset Management as money managers for the Fund and hired Algert Global LLC as a money manager for the Fund. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.85% to (i) 0.72% on the first $1 billion; (ii) 0.68% on the next $2 billion; (iii) 0.65% on the next $3 billion; and (iv) 0.63% in excess of $ 6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.73% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.54%. |
| Material Fund Change Adviser [Text Block] | In March 2024, RIM hired Calamos Advisors, LLC as a money manager for the Fund. In September 2024, RIM terminated Hermes Investment Limited and Sompo Asset Management as money managers for the Fund and hired Algert Global LLC as a money manager for the Fund. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| C000174743 | |
| Shareholder Report [Line Items] | |
| Fund Name | Multi-Asset Growth Strategy Fund |
| Class Name | Class Y |
| Trading Symbol | RMGYX |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-787-7354 |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of $10,000 Investment Costs Paid as % of $10,000 Investment Class Y $78 0.70% |
| Expenses Paid, Amount | $ 78 |
| Expense Ratio, Percent | 0.70% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? The fiscal year saw heightened volatility as conflicting economic data and central bank policy affected investor sentiment. Initially, central banks raised or maintained interest rates as economic data remained resilient; however, in the second half of the year, moderating inflation and slowing growth prompted central banks to deliver the first interest rate cuts since the pandemic. Equities outperformed fixed income, with equity rallies differentiated across global markets. In the U.S., artificial intelligence (“AI”) and market concentration within large-cap names drove outperformance. Fixed income markets were affected by restrictive monetary policy but delivered positive returns over the fiscal year. Lower quality, higher yielding credit posted greater returns than the aggregate fixed income index as credit spreads remained tight. The Fund underperformed the Multi-Asset Growth Strategy Composite Index for the fiscal year. Security selection was a negative contributor to benchmark-relative performance, as active managers struggled in a concentrated market driven by AI themes. Active management of the Fund’s duration positioning was a notable positive contributor. Russell Investment Management, LLC’s (“RIM”) positioning strategy, which sought to control Fund-level exposures and risks through the purchase of a stock portfolio providing exposure to value and low volatility factors, contributed positively to benchmark-relative performance. During the fiscal year, RIM used equity and fixed income derivatives, such as futures and options, to seek to maintain tactical asset allocation preferences and implement risk-mitigation strategies and these instruments performed as intended. |
| Performance Past Does Not Indicate Future [Text] | *The Fund's past performance is not a good predictor of the Fund's future performance. </span>" id="sjs-B1649"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9.33333px; grid-area: auto; line-height: 14px; margin: 0px; overflow: visible; text-align: justify;">*The Fund's past performance is not a good predictor of the Fund's future performance. </span> |
| Line Graph [Table Text Block] | Class Y Footnote Reference Russell 1000 ® Index Footnote Reference Multi-Asset Growth Strategy Composite Index Footnote Reference 60% FTSE All-World/40% FTSE U.S. Broad Investment Grade Composite Index 3/7/2017 10,000 10,000 10,000 10,000 2017 10,605 11,006 10,905 10,922 2018 10,333 11,774 10,850 10,842 2019 10,866 13,440 12,197 12,243 2020 10,392 14,901 12,637 13,009 2021 12,416 21,384 15,594 15,782 2022 10,146 17,882 12,790 12,962 2023 10,990 19,578 13,718 13,849 2024 13,472 27,031 17,111 17,134 |
| Average Annual Return [Table Text Block] | 1 Year 5 Years Since Inception Class Y Footnote Reference 22.58% 4.39% 3.97% Russell 1000 ® Index Footnote Reference 38.07% 15.00% 13.88% Multi-Asset Growth Strategy Composite Index Footnote Reference 24.73% 7.01% 7.27% 60% FTSE All-World/40% FTSE U.S. Broad Investment Grade Composite Index 23.72% 6.95% 7.29% |
| No Deduction of Taxes [Text Block] | The returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Material Change Description [Text Block] | |
| Updated Performance Information Location [Text Block] | |
| AssetsNet | $ 589,888,000 |
| Holdings Count | Holding | 1,302 |
| Advisory Fees Paid, Amount | $ 4,468,000 |
| InvestmentCompanyPortfolioTurnover | 92% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets (thousands) $589,888 Total Number of Portfolio Holdings 1,302 Total Advisory Fees Paid (thousands) $4,468 Portfolio Turnover Rate 92% |
| Holdings [Text Block] | Asset Type Exposure Value Value Other 2.6% Preferred Stocks 0.2% Long-Term Investments 15.7% Short-Term Investments 16.8% Common Stocks 64.7% |
| Material Fund Change [Text Block] | Material Fund Changes Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.85% to (i) 0.72% on the first $1 billion; (ii) 0.68% on the next $2 billion; (iii) 0.65% on the next $3 billion; and (iv) 0.63% in excess of $ 6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.73% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.54%. In March 2024, RIM hired Calamos Advisors, LLC as a money manager for the Fund. In September 2024, RIM terminated Hermes Investment Limited and Sompo Asset Management as money managers for the Fund and hired Algert Global LLC as a money manager for the Fund. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, the Fund’s annual contractual advisory fee, calculated as a percentage of the Fund’s average daily net assets, was changed from 0.85% to (i) 0.72% on the first $1 billion; (ii) 0.68% on the next $2 billion; (iii) 0.65% on the next $3 billion; and (iv) 0.63% in excess of $ 6 billion. Until February 29, 2024, RIM contractually agreed to a Fund-level expense cap (with certain exclusions) of 0.73% on an annual basis. Effective March 1, 2024, RIM contractually agreed to a fee waiver that results in an effective annual advisory fee not to exceed 0.54%. |
| Material Fund Change Adviser [Text Block] | In March 2024, RIM hired Calamos Advisors, LLC as a money manager for the Fund. In September 2024, RIM terminated Hermes Investment Limited and Sompo Asset Management as money managers for the Fund and hired Algert Global LLC as a money manager for the Fund. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by March 1, 2025 at https://connect.rightprospectus.com/russellinvestments 1-800-787-7354 |
