Thornburg Investment Income Builder Fund Class C (TIBCX) N-CSR 3 Dec 24 Certified annual shareholder report (management investment company) Financial data

Form N-CSR Cover

Form N-CSR Cover	12 Months Ended
	Sep. 30, 2024
Shareholder Report [Line Items]
Document Type	N-CSR
Amendment Flag	false
Registrant Name	Thornburg Investment Trust
Entity Central Index Key	0000816153
Document Period End Date	Sep. 30, 2024

Shareholder Report

Shareholder Report	12 Months Ended
	Sep. 30, 2024 USD ($) Holdings
Shareholder Report [Line Items]
Document Type	N-CSR
Amendment Flag	false
Registrant Name	Thornburg Investment Trust
Entity Central Index Key	0000816153
Document Period End Date	Sep. 30, 2024
Thornburg Global Opportunities Fund - Class A
Shareholder Report [Line Items]
Class Name	CLASS: A
Trading Symbol	THOAX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Global Opportunities Fund Class A Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $149.00 1.30%
Expenses Paid, Amount	$ 149
Expense Ratio, Percent	1.30%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class A shares underperformed the MSCI All Country World Net Total Return USD Index (the 'Index”) during the 12-month period ended September 30, 2024. During the period, major world events included the ongoing Russian/Ukraine conflict, moderating inflation figures in the U.S., Mideast tensions, and upcoming political contests in the U.S. Despite the conflicting economic and geo-political signals, the S&P 500, the Bloomberg U.S. Aggregate Bond, and the MSCI ACWI indexes reported varying positive returns for the period, +36.3%, +11.6%, and +31.8%, respectively. In brief, most equities repriced higher due to a surprising level of economic strength and resilient corporate profits, while interest rates declined along with inflation rates, creating a more favorable backdrop for the economy. Stock selection was a positive contributor to relative performance, consistent with the Fund’s bottom-up investment approach. Sector and geographic allocations detracted from relative results. The Fund’s cash and currency forwards allocations were also a drag on performance. During the period, stock selection in communication services, energy, and the U.S. helped to drive relative performance. The Fund’s underweight allocation and weaker security selection in information technology hampered relative returns. In South Korea, both an overweight positioning and negative security selection detracted from returns.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Global Opportunities Fund MSCI All Country World Net Total Return USD Index 09/30/2014 9549.4862 10000 10/31/2014 9827.0408 10070.4015 11/30/2014 10221.2487 10238.8433 12/31/2014 10144.8207 10041.2717 01/31/2015 10068.3926 9884.2795 02/28/2015 10856.8085 10434.5511 03/31/2015 10820.6057 10272.8725 04/30/2015 10909.1014 10570.9341 05/31/2015 11251.0164 10557.1413 06/30/2015 10840.7183 10308.6058 07/31/2015 11186.6559 10398.1255 08/31/2015 10655.682 9685.3233 09/30/2015 9818.9957 9334.4339 10/31/2015 10217.2262 10067.0465 11/30/2015 10341.9246 9983.9174 12/31/2015 10257.9614 9803.8662 01/31/2016 9612.299 9212.5892 02/29/2016 9592.122 9149.2172 03/31/2016 10023.9088 9827.2446 04/30/2016 9910.9178 9972.308 05/31/2016 10161.112 9984.8759 06/30/2016 9486.3191 9924.4328 07/31/2016 9789.2028 10352.1142 08/31/2016 9918.4332 10386.9422 09/30/2016 10070.9793 10450.5805 10/31/2016 10184.2273 10273.192 11/30/2016 10386.4558 10351.2621 12/31/2016 10631.4649 10574.8749 01/31/2017 11008.4097 10864.043 02/28/2017 11057.0478 11168.8146 03/31/2017 11390.4474 11305.4106 04/30/2017 11824.1762 11481.6274 05/31/2017 12261.9585 11735.1688 06/30/2017 12139.3623 11788.5291 07/31/2017 12553.3426 12117.9572 08/31/2017 12366.6456 12164.3945 09/30/2017 12573.6357 12399.4036 10/31/2017 12817.1535 12656.8857 11/30/2017 12593.9289 12901.9065 12/31/2017 12932.5853 13109.9159 01/31/2018 13420.7609 13849.5047 02/28/2018 12757.6557 13267.8667 03/31/2018 12216.5944 12983.8641 04/30/2018 12529.8404 13107.839 05/31/2018 12562.3854 13124.1879 06/30/2018 12285.7526 13053.1473 07/31/2018 12537.9767 13446.7994 08/31/2018 12363.0471 13552.4017 09/30/2018 12175.9131 13611.407 10/31/2018 11101.9268 12591.3835 11/30/2018 11024.6323 12775.5352 12/31/2018 10227.3608 11875.5991 01/31/2019 11259.6707 12813.3987 02/28/2019 11384.5469 13156.1402 03/31/2019 11492.7729 13321.5465 04/30/2019 12100.5038 13771.3814 05/31/2019 10839.2542 12954.468 06/30/2019 11567.6987 13802.7479 07/31/2019 11655.112 13843.1675 08/31/2019 11051.5437 13514.8046 09/30/2019 11471.9602 13799.1266 10/31/2019 11979.7901 14176.8026 11/30/2019 12492.9325 14522.8991 12/31/2019 13130.0688 15034.2955 01/31/2020 12699.5748 14868.2501 02/29/2020 12155.1264 13667.3235 03/31/2020 9871.8197 11822.1855 04/30/2020 11095.7734 13088.6676 05/31/2020 11631.7807 13657.8975 06/30/2020 12015.8489 14094.3125 07/31/2020 12952.8066 14839.706 08/31/2020 13746.2662 15748.003 09/30/2020 13374.8596 15240.2279 10/31/2020 13315.7722 14869.7412 11/30/2020 15084.9676 16702.6307 12/31/2020 16060.8146 17478.1127 01/31/2021 16029.1899 17398.658 02/28/2021 16747.5217 17801.6296 03/31/2021 17145.089 18277.1328 04/30/2021 17958.2948 19076.2595 05/31/2021 18152.5606 19373.0962 06/30/2021 18143.525 19628.3949 07/31/2021 18066.7222 19763.6596 08/31/2021 18346.8264 20258.3342 09/30/2021 17764.0289 19421.4506 10/31/2021 18161.5962 20412.8235 11/30/2021 17545.4124 19921.2376 12/31/2021 18376.0423 20718.1276 01/31/2022 18288.2669 19700.6071 02/28/2022 17761.6144 19191.767 03/31/2022 17901.0224 19607.4662 04/30/2022 16852.8806 18038.0232 05/31/2022 17245.2884 18059.165 06/30/2022 15567.2289 16536.8516 07/31/2022 15980.2897 17691.6605 08/31/2022 15675.6574 17040.3131 09/30/2022 14333.2098 15409.0425 10/31/2022 15278.0863 16338.9605 11/30/2022 17037.6688 17606.2413 12/31/2022 16474.6254 16913.4626 01/31/2023 17808.2345 18125.7322 02/28/2023 17299.4278 17606.2413 03/31/2023 17154.8196 18149.1107 04/30/2023 17283.3602 18409.9478 05/31/2023 16913.8059 18212.749 06/30/2023 17626.1353 19270.2098 07/31/2023 18820.492 19975.663 08/31/2023 17947.4869 19417.4566 09/30/2023 17476.1712 18614.5489 10/31/2023 16646.0129 18054.8514 11/30/2023 17853.4202 19721.2696 12/31/2023 19095.0603 20668.5483 01/31/2024 18987.4027 20789.7007 02/29/2024 19486.0274 21681.8618 03/31/2024 20670.2611 22362.6052 04/30/2024 20619.2654 21624.7737 05/31/2024 21384.2011 22503.0355 06/30/2024 21406.8658 23004.2603 07/31/2024 21695.8415 23375.2263 08/31/2024 21865.8272 23968.8998 09/30/2024 22489.1081 24525.7216
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Global Opportunities Fund Class A (with sales charge) 22.88% 13.36% 8.44% Global Opportunities Fund Class A (without sales charge) 28.68% 14.41% 8.94% MSCI All Country World Net Total Return USD Index 31.76% 12.19% 9.39%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment and assumes the deduction of the maximum sales charge associated with that investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fgo/THOAX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 1,306,000,000
Holdings Count | Holdings	37
Advisory Fees Paid, Amount	$ 9,300,000
Investment Company, Portfolio Turnover	14.91%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $1,306.0 Number of Holdings 37 Annual Portfolio Turnover 14.91% Total Advisory Fee $9.3
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 2.6 Mid Cap ($2.5-12 B) 17.7 Large Cap (>$12 B) 79.8 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 2.6% Mid Cap ($2.5-12 B) 17.7% Large Cap (>$12 B) 79.8% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Global Opportunities Fund - Class C
Shareholder Report [Line Items]
Class Name	CLASS: C
Trading Symbol	THOCX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Global Opportunities Fund Class C Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $243.00 2.14%
Expenses Paid, Amount	$ 243
Expense Ratio, Percent	2.14%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class C shares underperformed the MSCI All Country World Net Total Return USD Index (the 'Index”) during the 12-month period ended September 30, 2024. During the period, major world events included the ongoing Russian/Ukraine conflict, moderating inflation figures in the U.S., Mideast tensions, and upcoming political contests in the U.S. Despite the conflicting economic and geo-political signals, the S&P 500, the Bloomberg U.S. Aggregate Bond, and the MSCI ACWI indexes reported varying positive returns for the period, +36.3%, +11.6%, and +31.8%, respectively. In brief, most equities repriced higher due to a surprising level of economic strength and resilient corporate profits, while interest rates declined along with inflation rates, creating a more favorable backdrop for the economy. Stock selection was a positive contributor to relative performance, consistent with the Fund’s bottom-up investment approach. Sector and geographic allocations detracted from relative results. The Fund’s cash and currency forwards allocations were also a drag on performance. During the period, stock selection in communication services, energy, and the U.S. helped to drive relative performance. The Fund’s underweight allocation and weaker security selection in information technology hampered relative returns. In South Korea, both an overweight positioning and negative security selection detracted from returns.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Global Opportunities Fund MSCI All Country World Net Total Return USD Index 09/30/2014 10000.0039 10000 10/31/2014 10284.1194 10070.4015 11/30/2014 10684.464 10238.8433 12/31/2014 10602.6731 10041.2717 01/31/2015 10512.2728 9884.2795 02/28/2015 11330.181 10434.5511 03/31/2015 11282.8284 10272.8725 04/30/2015 11368.924 10570.9341 05/31/2015 11717.6112 10557.1413 06/30/2015 11287.1332 10308.6058 07/31/2015 11635.8203 10398.1255 08/31/2015 11076.1989 9685.3233 09/30/2015 10202.3286 9334.4339 10/31/2015 10606.9779 10067.0465 11/30/2015 10731.8165 9983.9174 12/31/2015 10637.1114 9803.8662 01/31/2016 9956.9561 9212.5892 02/29/2016 9935.4322 9149.2172 03/31/2016 10374.5198 9827.2446 04/30/2016 10253.986 9972.308 05/31/2016 10503.6632 9984.8759 06/30/2016 9801.9841 9924.4328 07/31/2016 10107.6234 10352.1142 08/31/2016 10232.4621 10386.9422 09/30/2016 10387.4341 10450.5805 10/31/2016 10495.0536 10273.192 11/30/2016 10701.6831 10351.2621 12/31/2016 10943.2993 10574.8749 01/31/2017 11322.288 10864.043 02/28/2017 11369.6616 11168.8146 03/31/2017 11705.5834 11305.4106 04/30/2017 12140.5591 11481.6274 05/31/2017 12584.1482 11735.1688 06/30/2017 12450.6408 11788.5291 07/31/2017 12864.083 12117.9572 08/31/2017 12665.9753 12164.3945 09/30/2017 12868.3897 12399.4036 10/31/2017 13109.5644 12656.8857 11/30/2017 12877.0031 12901.9065 12/31/2017 13207.4222 13109.9159 01/31/2018 13702.9698 13849.5047 02/28/2018 13013.5122 13267.8667 03/31/2018 12457.637 12983.8641 04/30/2018 12767.8929 13107.839 05/31/2018 12793.7476 13124.1879 06/30/2018 12505.0372 13053.1473 07/31/2018 12754.9656 13446.7994 08/31/2018 12569.6739 13552.4017 09/30/2018 12367.1457 13611.407 10/31/2018 11268.3226 12591.3835 11/30/2018 11182.1404 12775.5352 12/31/2018 10366.2804 11875.5991 01/31/2019 11407.264 12813.3987 02/28/2019 11529.2203 13156.1402 03/31/2019 11629.3986 13321.5465 04/30/2019 12239.1798 13771.3814 05/31/2019 10954.2837 12954.468 06/30/2019 11681.6656 13802.7479 07/31/2019 11760.066 13843.1675 08/31/2019 11145.9292 13514.8046 09/30/2019 11564.0649 13799.1266 10/31/2019 12069.3122 14176.8026 11/30/2019 12580.1104 14522.8991 12/31/2019 13209.1159 15034.2955 01/31/2020 12773.6506 14868.2501 02/29/2020 12219.4219 13667.3235 03/31/2020 9914.5346 11822.1855 04/30/2020 11141.7551 13088.6676 05/31/2020 11673.9906 13657.8975 06/30/2020 12052.2736 14094.3125 07/31/2020 12980.3866 14839.706 08/31/2020 13767.7432 15748.003 09/30/2020 13389.4602 15240.2279 10/31/2020 13319.0819 14869.7412 11/30/2020 15083.7608 16702.6307 12/31/2020 16042.4344 17478.1127 01/31/2021 15999.9316 17398.658 02/28/2021 16713.0337 17801.6296 03/31/2021 17095.5586 18277.1328 04/30/2021 17893.6662 19076.2595 05/31/2021 18077.8448 19373.0962 06/30/2021 18054.2322 19628.3949 07/31/2021 17969.2267 19763.6596 08/31/2021 18233.6883 20258.3342 09/30/2021 17643.3721 19421.4506 10/31/2021 18025.897 20412.8235 11/30/2021 17404.343 19921.2376 12/31/2021 18216.341 20718.1276 01/31/2022 18119.3309 19700.6071 02/28/2022 17591.1648 19191.767 03/31/2022 17715.1222 19607.4662 04/30/2022 16669.5689 18038.0232 05/31/2022 17041.4409 18059.165 06/30/2022 15376.1008 16536.8516 07/31/2022 15769.5307 17691.6605 08/31/2022 15462.3321 17040.3131 09/30/2022 14125.7484 15409.0425 10/31/2022 15047.3444 16338.9605 11/30/2022 16776.1303 17606.2413 12/31/2022 16209.3211 16913.4626 01/31/2023 17512.4995 18125.7322 02/28/2023 16996.7736 17606.2413 03/31/2023 16841.5013 18149.1107 04/30/2023 16963.501 18409.9478 05/31/2023 16586.411 18212.749 06/30/2023 17274.0456 19270.2098 07/31/2023 18427.4971 19975.663 08/31/2023 17562.4085 19417.4566 09/30/2023 17091.0461 18614.5489 10/31/2023 16270.321 18054.8514 11/30/2023 17437.2686 19721.2696 12/31/2023 18629.6259 20668.5483 01/31/2024 18513.4811 20789.7007 02/29/2024 18989.6748 21681.8618 03/31/2024 20127.8938 22362.6052 04/30/2024 20064.0142 21624.7737 05/31/2024 20795.7264 22503.0355 06/30/2024 20801.5337 23004.2603 07/31/2024 21068.6667 23375.2263 08/31/2024 21219.655 23968.8998 09/30/2024 21806.1862 24525.7216
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Global Opportunities Fund Class C (with sales charge) 26.59% 13.53% 8.11% Global Opportunities Fund Class C (without sales charge) 27.59% 13.53% 8.11% MSCI All Country World Net Total Return USD Index 31.76% 12.19% 9.39%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fgo/THOCX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 1,306,000,000
Holdings Count | Holdings	37
Advisory Fees Paid, Amount	$ 9,300,000
Investment Company, Portfolio Turnover	14.91%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $1,306.0 Number of Holdings 37 Annual Portfolio Turnover 14.91% Total Advisory Fee $9.3
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 2.6 Mid Cap ($2.5-12 B) 17.7 Large Cap (>$12 B) 79.8 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 2.6% Mid Cap ($2.5-12 B) 17.7% Large Cap (>$12 B) 79.8% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Global Opportunities Fund - Class I
Shareholder Report [Line Items]
Class Name	CLASS: I
Trading Symbol	THOIX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Global Opportunities Fund Class I Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $113.00 0.99%
Expenses Paid, Amount	$ 113
Expense Ratio, Percent	0.99%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class I shares underperformed the MSCI All Country World Net Total Return USD Index (the 'Index”) during the 12-month period ended September 30, 2024. During the period, major world events included the ongoing Russian/Ukraine conflict, moderating inflation figures in the U.S., Mideast tensions, and upcoming political contests in the U.S. Despite the conflicting economic and geo-political signals, the S&P 500, the Bloomberg U.S. Aggregate Bond, and the MSCI ACWI indexes reported varying positive returns for the period, +36.3%, +11.6%, and +31.8%, respectively. In brief, most equities repriced higher due to a surprising level of economic strength and resilient corporate profits, while interest rates declined along with inflation rates, creating a more favorable backdrop for the economy. Stock selection was a positive contributor to relative performance, consistent with the Fund’s bottom-up investment approach. Sector and geographic allocations detracted from relative results. The Fund’s cash and currency forwards allocations were also a drag on performance. During the period, stock selection in communication services, energy, and the U.S. helped to drive relative performance. The Fund’s underweight allocation and weaker security selection in information technology hampered relative returns. In South Korea, both an overweight positioning and negative security selection detracted from returns.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Global Opportunities Fund MSCI All Country World Net Total Return USD Index 09/30/2014 10000.0076 10000 10/31/2014 10294.2491 10070.4015 11/30/2014 10706.1872 10238.8433 12/31/2014 10632.4899 10041.2717 01/31/2015 10552.578 9884.2795 02/28/2015 11381.1383 10434.5511 03/31/2015 11347.4912 10272.8725 04/30/2015 11444.2267 10570.9341 05/31/2015 11805.9332 10557.1413 06/30/2015 11381.1383 10308.6058 07/31/2015 11747.0508 10398.1255 08/31/2015 11191.8733 9685.3233 09/30/2015 10317.0482 9334.4339 10/31/2015 10737.6372 10067.0465 11/30/2015 10872.2256 9983.9174 12/31/2015 10787.469 9803.8662 01/31/2016 10110.6082 9212.5892 02/29/2016 10093.6867 9149.2172 03/31/2016 10550.5677 9827.2446 04/30/2016 10436.3475 9972.308 05/31/2016 10698.631 9984.8759 06/30/2016 9994.5996 9924.4328 07/31/2016 10317.0061 10352.1142 08/31/2016 10456.9983 10386.9422 09/30/2016 10616.9856 10450.5805 10/31/2016 10740.34 10273.192 11/30/2016 10961.5272 10351.2621 12/31/2016 11222.5256 10574.8749 01/31/2017 11619.3678 10864.043 02/28/2017 11679.1074 11168.8146 03/31/2017 12033.2099 11305.4106 04/30/2017 12490.2754 11481.6274 05/31/2017 12960.1558 11735.1688 06/30/2017 12832.7291 11788.5291 07/31/2017 13273.6134 12117.9572 08/31/2017 13080.9941 12164.3945 09/30/2017 13303.8056 12399.4036 10/31/2017 13569.3677 12656.8857 11/30/2017 13333.7884 12901.9065 12/31/2017 13694.5709 13109.9159 01/31/2018 14218.8061 13849.5047 02/28/2018 13518.3935 13267.8667 03/31/2018 12946.8911 12983.8641 04/30/2018 13282.0579 13107.839 05/31/2018 13320.731 13124.1879 06/30/2018 13032.8313 13053.1473 07/31/2018 13303.543 13446.7994 08/31/2018 13118.7715 13552.4017 09/30/2018 12921.1091 13611.407 10/31/2018 11786.6984 12591.3835 11/30/2018 11709.3523 12775.5352 12/31/2018 10864.2322 11875.5991 01/31/2019 11963.4576 12813.3987 02/28/2019 12100.309 13156.1402 03/31/2019 12219.5021 13321.5465 04/30/2019 12868.4424 13771.3814 05/31/2019 11530.8307 12954.468 06/30/2019 12307.7933 13802.7479 07/31/2019 12400.499 13843.1675 08/31/2019 11764.8024 13514.8046 09/30/2019 12215.0875 13799.1266 10/31/2019 12758.0784 14176.8026 11/30/2019 13311.1772 14522.8991 12/31/2019 13989.2197 15034.2955 01/31/2020 13531.2927 14868.2501 02/29/2020 12956.6393 13667.3235 03/31/2020 10523.3411 11822.1855 04/30/2020 11834.2693 13088.6676 05/31/2020 12408.9227 13657.8975 06/30/2020 12821.9549 14094.3125 07/31/2020 13827.5984 14839.706 08/31/2020 14671.6206 15748.003 09/30/2020 14281.0359 15240.2279 10/31/2020 14222.6726 14869.7412 11/30/2020 16118.2923 16702.6307 12/31/2020 17159.4793 17478.1127 01/31/2021 17130.5831 17398.658 02/28/2021 17905.9624 17801.6296 03/31/2021 18329.7721 18277.1328 04/30/2021 19206.2878 19076.2595 05/31/2021 19418.1926 19373.0962 06/30/2021 19413.3766 19628.3949 07/31/2021 19336.3203 19763.6596 08/31/2021 19639.7296 20258.3342 09/30/2021 19018.463 19421.4506 10/31/2021 19451.9048 20412.8235 11/30/2021 18794.8876 19921.2376 12/31/2021 19690.6206 20718.1276 01/31/2022 19602.3713 19700.6071 02/28/2022 19045.2977 19191.767 03/31/2022 19199.734 19607.4662 04/30/2022 18080.0712 18038.0232 05/31/2022 18504.7709 18059.165 06/30/2022 16706.6918 16536.8516 07/31/2022 17153.4538 17691.6605 08/31/2022 16833.5502 17040.3131 09/30/2022 15393.9838 15409.0425 10/31/2022 16408.8505 16338.9605 11/30/2022 18310.5662 17606.2413 12/31/2022 17705.7707 16913.4626 01/31/2023 19145.8706 18125.7322 02/28/2023 18600.8129 17606.2413 03/31/2023 18451.6392 18149.1107 04/30/2023 18595.0754 18409.9478 05/31/2023 18204.9289 18212.749 06/30/2023 18973.7472 19270.2098 07/31/2023 20264.6734 19975.663 08/31/2023 19329.4691 19417.4566 09/30/2023 18830.3109 18614.5489 10/31/2023 17941.0061 18054.8514 11/30/2023 19246.049 19721.2696 12/31/2023 20582.4462 20668.5483 01/31/2024 20478.9862 20789.7007 02/29/2024 21020.6295 21681.8618 03/31/2024 22304.7502 22362.6052 04/30/2024 22256.0632 21624.7737 05/31/2024 23083.7428 22503.0355 06/30/2024 23114.1722 23004.2603 07/31/2024 23436.7239 23375.2263 08/31/2024 23619.3003 23968.8998 09/30/2024 24300.9188 24525.7216
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Global Opportunities Fund Class I 29.05% 14.75% 9.29% MSCI All Country World Net Total Return USD Index 31.76% 12.19% 9.39%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fgo/THOIX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 1,306,000,000
Holdings Count | Holdings	37
Advisory Fees Paid, Amount	$ 9,300,000
Investment Company, Portfolio Turnover	14.91%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $1,306.0 Number of Holdings 37 Annual Portfolio Turnover 14.91% Total Advisory Fee $9.3
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 2.6 Mid Cap ($2.5-12 B) 17.7 Large Cap (>$12 B) 79.8 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 2.6% Mid Cap ($2.5-12 B) 17.7% Large Cap (>$12 B) 79.8% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Global Opportunities Fund - Class R3
Shareholder Report [Line Items]
Class Name	CLASS: R3
Trading Symbol	THORX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Global Opportunities Fund Class R3 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R3 $171.00 1.50%
Expenses Paid, Amount	$ 171
Expense Ratio, Percent	1.50%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R3 shares underperformed the MSCI All Country World Net Total Return USD Index (the 'Index”) during the 12-month period ended September 30, 2024. During the period, major world events included the ongoing Russian/Ukraine conflict, moderating inflation figures in the U.S., Mideast tensions, and upcoming political contests in the U.S. Despite the conflicting economic and geo-political signals, the S&P 500, the Bloomberg U.S. Aggregate Bond, and the MSCI ACWI indexes reported varying positive returns for the period, +36.3%, +11.6%, and +31.8%, respectively. In brief, most equities repriced higher due to a surprising level of economic strength and resilient corporate profits, while interest rates declined along with inflation rates, creating a more favorable backdrop for the economy. Stock selection was a positive contributor to relative performance, consistent with the Fund’s bottom-up investment approach. Sector and geographic allocations detracted from relative results. The Fund’s cash and currency forwards allocations were also a drag on performance. During the period, stock selection in communication services, energy, and the U.S. helped to drive relative performance. The Fund’s underweight allocation and weaker security selection in information technology hampered relative returns. In South Korea, both an overweight positioning and negative security selection detracted from returns.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Global Opportunities Fund MSCI All Country World Net Total Return USD Index 09/30/2014 9999.9894 10000 10/31/2014 10292.9827 10070.4015 11/30/2014 10700.6256 10238.8433 12/31/2014 10619.9463 10041.2717 01/31/2015 10535.0207 9884.2795 02/28/2015 11363.0453 10434.5511 03/31/2015 11320.5825 10272.8725 04/30/2015 11414.0006 10570.9341 05/31/2015 11766.4419 10557.1413 06/30/2015 11337.5676 10308.6058 07/31/2015 11698.5014 10398.1255 08/31/2015 11137.9924 9685.3233 09/30/2015 10267.505 9334.4339 10/31/2015 10679.3942 10067.0465 11/30/2015 10806.7826 9983.9174 12/31/2015 10721.0628 9803.8662 01/31/2016 10040.3604 9212.5892 02/29/2016 10019.0884 9149.2172 03/31/2016 10470.0538 9827.2446 04/30/2016 10350.9309 9972.308 05/31/2016 10610.4487 9984.8759 06/30/2016 9904.7592 9924.4328 07/31/2016 10219.7365 10352.1142 08/31/2016 10351.6864 10386.9422 09/30/2016 10511.9168 10450.5805 10/31/2016 10627.0108 10273.192 11/30/2016 10840.1478 10351.2621 12/31/2016 11095.6683 10574.8749 01/31/2017 11484.3156 10864.043 02/28/2017 11535.5658 11168.8146 03/31/2017 11881.5047 11305.4106 04/30/2017 12329.944 11481.6274 05/31/2017 12786.9249 11735.1688 06/30/2017 12655.6101 11788.5291 07/31/2017 13087.2942 12117.9572 08/31/2017 12886.4115 12164.3945 09/30/2017 13104.3906 12399.4036 10/31/2017 13356.5625 12656.8857 11/30/2017 13121.487 12901.9065 12/31/2017 13466.3868 13109.9159 01/31/2018 13975.9258 13849.5047 02/28/2018 13282.2677 13267.8667 03/31/2018 12717.0648 12983.8641 04/30/2018 13038.2028 13107.839 05/31/2018 13072.4575 13124.1879 06/30/2018 12781.2924 13053.1473 07/31/2018 13042.4846 13446.7994 08/31/2018 12858.3655 13552.4017 09/30/2018 12661.4009 13611.407 10/31/2018 11543.8406 12591.3835 11/30/2018 11458.2038 12775.5352 12/31/2018 10628.775 11875.5991 01/31/2019 11698.2 12813.3987 02/28/2019 11829.15 13156.1402 03/31/2019 11942.64 13321.5465 04/30/2019 12571.2 13771.3814 05/31/2019 11257.335 12954.468 06/30/2019 12012.48 13802.7479 07/31/2019 12099.78 13843.1675 08/31/2019 11471.22 13514.8046 09/30/2019 11907.72 13799.1266 10/31/2019 12431.52 14176.8026 11/30/2019 12960.8988 14522.8991 12/31/2019 13617.0049 15034.2955 01/31/2020 13166.783 14868.2501 02/29/2020 12601.7987 13667.3235 03/31/2020 10231.5129 11822.1855 04/30/2020 11502.7276 13088.6676 05/31/2020 12054.4701 13657.8975 06/30/2020 12451.7247 14094.3125 07/31/2020 13418.3776 14839.706 08/31/2020 14234.9565 15748.003 09/30/2020 13850.9437 15240.2279 10/31/2020 13789.1486 14869.7412 11/30/2020 15617.2776 16702.6307 12/31/2020 16619.6581 17478.1127 01/31/2021 16586.5607 17398.658 02/28/2021 17328.8897 17801.6296 03/31/2021 17735.5157 18277.1328 04/30/2021 18572.4089 19076.2595 05/31/2021 18770.9937 19373.0962 06/30/2021 18756.8091 19628.3949 07/31/2021 18676.4295 19763.6596 08/31/2021 18960.1221 20258.3342 09/30/2021 18350.183 19421.4506 10/31/2021 18761.5373 20412.8235 11/30/2021 18120.8125 19921.2376 12/31/2021 18976.9929 20718.1276 01/31/2022 18879.8134 19700.6071 02/28/2022 18339.9274 19191.767 03/31/2022 18480.2978 19607.4662 04/30/2022 17395.1269 18038.0232 05/31/2022 17800.0414 18059.165 06/30/2022 16061.6085 16536.8516 07/31/2022 16482.7196 17691.6605 08/31/2022 16169.5857 17040.3131 09/30/2022 14776.6798 15409.0425 10/31/2022 15748.4746 16338.9605 11/30/2022 17566.7263 17606.2413 12/31/2022 16980.4429 16913.4626 01/31/2023 18354.9703 18125.7322 02/28/2023 17824.1569 17606.2413 03/31/2023 17673.2941 18149.1107 04/30/2023 17807.3944 18409.9478 05/31/2023 17421.8562 18212.749 06/30/2023 18153.82 19270.2098 07/31/2023 19377.4847 19975.663 08/31/2023 18477.8956 19417.4566 09/30/2023 17991.7822 18614.5489 10/31/2023 17136.8932 18054.8514 11/30/2023 18374.1106 19721.2696 12/31/2023 19644.6953 20668.5483 01/31/2024 19532.5748 20789.7007 02/29/2024 20051.8698 21681.8618 03/31/2024 21267.4923 22362.6052 04/30/2024 21208.4815 21624.7737 05/31/2024 21993.3252 22503.0355 06/30/2024 22011.0284 23004.2603 07/31/2024 22306.0824 23375.2263 08/31/2024 22477.2137 23968.8998 09/30/2024 23114.5304 24525.7216
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Global Opportunities Fund Class R3 28.47% 14.19% 8.74% MSCI All Country World Net Total Return USD Index 31.76% 12.19% 9.39%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fgo/THORX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 1,306,000,000
Holdings Count | Holdings	37
Advisory Fees Paid, Amount	$ 9,300,000
Investment Company, Portfolio Turnover	14.91%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $1,306.0 Number of Holdings 37 Annual Portfolio Turnover 14.91% Total Advisory Fee $9.3
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 2.6 Mid Cap ($2.5-12 B) 17.7 Large Cap (>$12 B) 79.8 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 2.6% Mid Cap ($2.5-12 B) 17.7% Large Cap (>$12 B) 79.8% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Global Opportunities Fund - Class R4
Shareholder Report [Line Items]
Class Name	CLASS: R4
Trading Symbol	THOVX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Global Opportunities Fund Class R4 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R4 $160.00 1.40%
Expenses Paid, Amount	$ 160
Expense Ratio, Percent	1.40%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R4 shares underperformed the MSCI All Country World Net Total Return USD Index (the 'Index”) during the 12-month period ended September 30, 2024. During the period, major world events included the ongoing Russian/Ukraine conflict, moderating inflation figures in the U.S., Mideast tensions, and upcoming political contests in the U.S. Despite the conflicting economic and geo-political signals, the S&P 500, the Bloomberg U.S. Aggregate Bond, and the MSCI ACWI indexes reported varying positive returns for the period, +36.3%, +11.6%, and +31.8%, respectively. In brief, most equities repriced higher due to a surprising level of economic strength and resilient corporate profits, while interest rates declined along with inflation rates, creating a more favorable backdrop for the economy. Stock selection was a positive contributor to relative performance, consistent with the Fund’s bottom-up investment approach. Sector and geographic allocations detracted from relative results. The Fund’s cash and currency forwards allocations were also a drag on performance. During the period, stock selection in communication services, energy, and the U.S. helped to drive relative performance. The Fund’s underweight allocation and weaker security selection in information technology hampered relative returns. In South Korea, both an overweight positioning and negative security selection detracted from returns.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Global Opportunities Fund MSCI All Country World Net Total Return USD Index 09/30/2014 9999.9968 10000 10/31/2014 10292.7417 10070.4015 11/30/2014 10700.039 10238.8433 12/31/2014 10623.6707 10041.2717 01/31/2015 10538.8171 9884.2795 02/28/2015 11366.1397 10434.5511 03/31/2015 11323.7129 10272.8725 04/30/2015 11417.0519 10570.9341 05/31/2015 11773.437 10557.1413 06/30/2015 11344.9263 10308.6058 07/31/2015 11705.5541 10398.1255 08/31/2015 11149.763 9685.3233 09/30/2015 10275.771 9334.4339 10/31/2015 10687.3109 10067.0465 11/30/2015 10818.834 9983.9174 12/31/2015 10728.5189 9803.8662 01/31/2016 10047.6133 9212.5892 02/29/2016 10030.5906 9149.2172 03/31/2016 10481.6906 9827.2446 04/30/2016 10362.5321 9972.308 05/31/2016 10622.1274 9984.8759 06/30/2016 9917.4895 9924.4328 07/31/2016 10236.9963 10352.1142 08/31/2016 10369.0591 10386.9422 09/30/2016 10527.7992 10450.5805 10/31/2016 10647.2877 10273.192 11/30/2016 10860.6602 10351.2621 12/31/2016 11115.7151 10574.8749 01/31/2017 11509.1917 10864.043 02/28/2017 11560.5148 11168.8146 03/31/2017 11907.335 11305.4106 04/30/2017 12360.7034 11481.6274 05/31/2017 12818.3488 11735.1688 06/30/2017 12686.2919 11788.5291 07/31/2017 13118.7305 12117.9572 08/31/2017 12921.7783 12164.3945 09/30/2017 13140.1383 12399.4036 10/31/2017 13392.751 12656.8857 11/30/2017 13157.2646 12901.9065 12/31/2017 13505.2978 13109.9159 01/31/2018 14020.1122 13849.5047 02/28/2018 13320.8226 13267.8667 03/31/2018 12754.5268 12983.8641 04/30/2018 13080.5759 13107.839 05/31/2018 13114.8968 13124.1879 06/30/2018 12827.4588 13053.1473 07/31/2018 13089.1561 13446.7994 08/31/2018 12904.681 13552.4017 09/30/2018 12707.3354 13611.407 10/31/2018 11587.6141 12591.3835 11/30/2018 11506.1018 12775.5352 12/31/2018 10668.3158 11875.5991 01/31/2019 11745.6581 12813.3987 02/28/2019 11877.0413 13156.1402 03/31/2019 11990.9067 13321.5465 04/30/2019 12625.9255 13771.3814 05/31/2019 11307.7141 12954.468 06/30/2019 12065.3572 13802.7479 07/31/2019 12152.946 13843.1675 08/31/2019 11526.6861 13514.8046 09/30/2019 11964.6301 13799.1266 10/31/2019 12490.1629 14176.8026 11/30/2019 13025.6801 14522.8991 12/31/2019 13684.4806 15034.2955 01/31/2020 13233.4896 14868.2501 02/29/2020 12663.1187 13667.3235 03/31/2020 10284.3625 11822.1855 04/30/2020 11562.1702 13088.6676 05/31/2020 12119.2767 13657.8975 06/30/2020 12517.2099 14094.3125 07/31/2020 13494.357 14839.706 08/31/2020 14312.3308 15748.003 09/30/2020 13927.662 15240.2279 10/31/2020 13865.7613 14869.7412 11/30/2020 15705.7628 16702.6307 12/31/2020 16719.0378 17478.1127 01/31/2021 16685.8933 17398.658 02/28/2021 17434.0123 17801.6296 03/31/2021 17841.2162 18277.1328 04/30/2021 18684.0338 19076.2595 05/31/2021 18887.6358 19373.0962 06/30/2021 18873.431 19628.3949 07/31/2021 18797.6721 19763.6596 08/31/2021 19081.7679 20258.3342 09/30/2021 18470.9619 19421.4506 10/31/2021 18882.9008 20412.8235 11/30/2021 18241.12 19921.2376 12/31/2021 19106.5306 20718.1276 01/31/2022 19014.5682 19700.6071 02/28/2022 18468.2037 19191.767 03/31/2022 18608.852 19607.4662 04/30/2022 17521.5325 18038.0232 05/31/2022 17927.2487 18059.165 06/30/2022 16179.9641 16536.8516 07/31/2022 16607.3185 17691.6605 08/31/2022 16288.155 17040.3131 09/30/2022 14892.4911 15409.0425 10/31/2022 15871.6197 16338.9605 11/30/2022 17698.9175 17606.2413 12/31/2022 17110.5497 16913.4626 01/31/2023 18495.3157 18125.7322 02/28/2023 17962.7134 17606.2413 03/31/2023 17811.3422 18149.1107 04/30/2023 17945.8943 18409.9478 05/31/2023 17559.0569 18212.749 06/30/2023 18299.0938 19270.2098 07/31/2023 19538.0949 19975.663 08/31/2023 18629.8678 19417.4566 09/30/2023 18142.1162 18614.5489 10/31/2023 17278.7399 18054.8514 11/30/2023 18525.6648 19721.2696 12/31/2023 19810.4508 20668.5483 01/31/2024 19697.8578 20789.7007 02/29/2024 20219.3414 21681.8618 03/31/2024 21446.0131 22362.6052 04/30/2024 21392.6795 21624.7737 05/31/2024 22180.8308 22503.0355 06/30/2024 22204.5346 23004.2603 07/31/2024 22500.8321 23375.2263 08/31/2024 22672.6847 23968.8998 09/30/2024 23318.6133 24525.7216
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Global Opportunities Fund Class R4 28.53% 14.28% 8.84% MSCI All Country World Net Total Return USD Index 31.76% 12.19% 9.39%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fgo/THOVX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 1,306,000,000
Holdings Count | Holdings	37
Advisory Fees Paid, Amount	$ 9,300,000
Investment Company, Portfolio Turnover	14.91%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $1,306.0 Number of Holdings 37 Annual Portfolio Turnover 14.91% Total Advisory Fee $9.3
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 2.6 Mid Cap ($2.5-12 B) 17.7 Large Cap (>$12 B) 79.8 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 2.6% Mid Cap ($2.5-12 B) 17.7% Large Cap (>$12 B) 79.8% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Global Opportunities Fund - Class R5
Shareholder Report [Line Items]
Class Name	CLASS: R5
Trading Symbol	THOFX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Global Opportunities Fund Class R5 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R5 $113.00 0.99%
Expenses Paid, Amount	$ 113
Expense Ratio, Percent	0.99%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R5 shares underperformed the MSCI All Country World Net Total Return USD Index (the 'Index”) during the 12-month period ended September 30, 2024. During the period, major world events included the ongoing Russian/Ukraine conflict, moderating inflation figures in the U.S., Mideast tensions, and upcoming political contests in the U.S. Despite the conflicting economic and geo-political signals, the S&P 500, the Bloomberg U.S. Aggregate Bond, and the MSCI ACWI indexes reported varying positive returns for the period, +36.3%, +11.6%, and +31.8%, respectively. In brief, most equities repriced higher due to a surprising level of economic strength and resilient corporate profits, while interest rates declined along with inflation rates, creating a more favorable backdrop for the economy. Stock selection was a positive contributor to relative performance, consistent with the Fund’s bottom-up investment approach. Sector and geographic allocations detracted from relative results. The Fund’s cash and currency forwards allocations were also a drag on performance. During the period, stock selection in communication services, energy, and the U.S. helped to drive relative performance. The Fund’s underweight allocation and weaker security selection in information technology hampered relative returns. In South Korea, both an overweight positioning and negative security selection detracted from returns.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Global Opportunities Fund MSCI All Country World Net Total Return USD Index 09/30/2014 10000.0095 10000 10/31/2014 10294.0039 10070.4015 11/30/2014 10705.5961 10238.8433 12/31/2014 10631.7684 10041.2717 01/31/2015 10551.9251 9884.2795 02/28/2015 11383.9765 10434.5511 03/31/2015 11346.156 10272.8725 04/30/2015 11447.0107 10570.9341 05/31/2015 11804.2045 10557.1413 06/30/2015 11379.7742 10308.6058 07/31/2015 11745.3726 10398.1255 08/31/2015 11190.6716 9685.3233 09/30/2015 10316.5974 9334.4339 10/31/2015 10732.6231 10067.0465 11/30/2015 10867.0961 9983.9174 12/31/2015 10784.6499 9803.8662 01/31/2016 10104.2704 9212.5892 02/29/2016 10091.5925 9149.2172 03/31/2016 10547.9962 9827.2446 04/30/2016 10429.6693 9972.308 05/31/2016 10695.9048 9984.8759 06/30/2016 9992.8975 9924.4328 07/31/2016 10314.9756 10352.1142 08/31/2016 10450.5874 10386.9422 09/30/2016 10617.2014 10450.5805 10/31/2016 10740.4102 10273.192 11/30/2016 10957.0878 10351.2621 12/31/2016 11222.004 10574.8749 01/31/2017 11618.3756 10864.043 02/28/2017 11673.7823 11168.8146 03/31/2017 12031.4736 11305.4106 04/30/2017 12487.987 11481.6274 05/31/2017 12957.2998 11735.1688 06/30/2017 12833.3098 11788.5291 07/31/2017 13269.3517 12117.9572 08/31/2017 13076.9803 12164.3945 09/30/2017 13302.6207 12399.4036 10/31/2017 13563.5403 12656.8857 11/30/2017 13328.2849 12901.9065 12/31/2017 13686.4717 13109.9159 01/31/2018 14209.9042 13849.5047 02/28/2018 13510.5641 13267.8667 03/31/2018 12939.9369 12983.8641 04/30/2018 13274.5904 13107.839 05/31/2018 13313.2043 13124.1879 06/30/2018 13021.455 13053.1473 07/31/2018 13296.0426 13446.7994 08/31/2018 13111.5541 13552.4017 09/30/2018 12914.1943 13611.407 10/31/2018 11781.5208 12591.3835 11/30/2018 11700.0026 12775.5352 12/31/2018 10857.4705 11875.5991 01/31/2019 11955.1198 12813.3987 02/28/2019 12096.1831 13156.1402 03/31/2019 12215.2053 13321.5465 04/30/2019 12863.2151 13771.3814 05/31/2019 11523.1132 12954.468 06/30/2019 12303.3699 13802.7479 07/31/2019 12395.9428 13843.1675 08/31/2019 11756.7494 13514.8046 09/30/2019 12210.7971 13799.1266 10/31/2019 12753.0094 14176.8026 11/30/2019 13300.9005 14522.8991 12/31/2019 13981.822 15034.2955 01/31/2020 13524.5774 14868.2501 02/29/2020 12946.2975 13667.3235 03/31/2020 10516.6253 11822.1855 04/30/2020 11825.6 13088.6676 05/31/2020 12403.8799 13657.8975 06/30/2020 12816.2966 14094.3125 07/31/2020 13815.9588 14839.706 08/31/2020 14663.2061 15748.003 09/30/2020 14273.2034 15240.2279 10/31/2020 14214.9271 14869.7412 11/30/2020 16107.7216 16702.6307 12/31/2020 17152.3832 17478.1127 01/31/2021 17123.5314 17398.658 02/28/2021 17897.7209 17801.6296 03/31/2021 18320.8803 18277.1328 04/30/2021 19196.051 19076.2595 05/31/2021 19407.6307 19373.0962 06/30/2021 19402.8221 19628.3949 07/31/2021 19330.6926 19763.6596 08/31/2021 19628.8277 20258.3342 09/30/2021 19008.5144 19421.4506 10/31/2021 19441.2911 20412.8235 11/30/2021 18785.3635 19921.2376 12/31/2021 19679.2668 20718.1276 01/31/2022 19591.1917 19700.6071 02/28/2022 19035.218 19191.767 03/31/2022 19189.3493 19607.4662 04/30/2022 18071.8973 18038.0232 05/31/2022 18495.7584 18059.165 06/30/2022 16701.2295 16536.8516 07/31/2022 17147.1094 17691.6605 08/31/2022 16822.3326 17040.3131 09/30/2022 15385.6085 15409.0425 10/31/2022 16403.9762 16338.9605 11/30/2022 18302.0651 17606.2413 12/31/2022 17697.335 16913.4626 01/31/2023 19134.4205 18125.7322 02/28/2023 18590.5037 17606.2413 03/31/2023 18441.6422 18149.1107 04/30/2023 18590.5037 18409.9478 05/31/2023 18195.4483 18212.749 06/30/2023 18968.3827 19270.2098 07/31/2023 20250.8813 19975.663 08/31/2023 19317.6346 19417.4566 09/30/2023 18819.5213 18614.5489 10/31/2023 17932.0781 18054.8514 11/30/2023 19234.4 19721.2696 12/31/2023 20572.512 20668.5483 01/31/2024 20463.2129 20789.7007 02/29/2024 21009.7082 21681.8618 03/31/2024 22290.9361 22362.6052 04/30/2024 22242.3587 21624.7737 05/31/2024 23074.246 22503.0355 06/30/2024 23104.6069 23004.2603 07/31/2024 23420.3597 23375.2263 08/31/2024 23608.597 23968.8998 09/30/2024 24288.68 24525.7216
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Global Opportunities Fund Class R5 29.06% 14.74% 9.28% MSCI All Country World Net Total Return USD Index 31.76% 12.19% 9.39%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fgo/THOFX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 1,306,000,000
Holdings Count | Holdings	37
Advisory Fees Paid, Amount	$ 9,300,000
Investment Company, Portfolio Turnover	14.91%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $1,306.0 Number of Holdings 37 Annual Portfolio Turnover 14.91% Total Advisory Fee $9.3
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 2.6 Mid Cap ($2.5-12 B) 17.7 Large Cap (>$12 B) 79.8 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 2.6% Mid Cap ($2.5-12 B) 17.7% Large Cap (>$12 B) 79.8% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Global Opportunities Fund - Class R6
Shareholder Report [Line Items]
Class Name	CLASS: R6
Trading Symbol	THOGX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Global Opportunities Fund Class R6 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R6 $97.00 0.85%
Expenses Paid, Amount	$ 97
Expense Ratio, Percent	0.85%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R6 shares underperformed the MSCI All Country World Net Total Return USD Index (the 'Index”) during the 12-month period ended September 30, 2024. During the period, major world events included the ongoing Russian/Ukraine conflict, moderating inflation figures in the U.S., Mideast tensions, and upcoming political contests in the U.S. Despite the conflicting economic and geo-political signals, the S&P 500, the Bloomberg U.S. Aggregate Bond, and the MSCI ACWI indexes reported varying positive returns for the period, +36.3%, +11.6%, and +31.8%, respectively. In brief, most equities repriced higher due to a surprising level of economic strength and resilient corporate profits, while interest rates declined along with inflation rates, creating a more favorable backdrop for the economy. Stock selection was a positive contributor to relative performance, consistent with the Fund’s bottom-up investment approach. Sector and geographic allocations detracted from relative results. The Fund’s cash and currency forwards allocations were also a drag on performance. During the period, stock selection in communication services, energy, and the U.S. helped to drive relative performance. The Fund’s underweight allocation and weaker security selection in information technology hampered relative returns. In South Korea, both an overweight positioning and negative security selection detracted from returns.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Global Opportunities Fund MSCI All Country World Net Total Return USD Index 04/10/2017 10000.0089 10000 04/30/2017 10328.0515 10183.8364 05/31/2017 10712.5316 10408.7195 06/30/2017 10606.7114 10456.0484 07/31/2017 10973.5547 10748.2405 08/31/2017 10814.8244 10789.4289 09/30/2017 11001.6612 10997.8745 10/31/2017 11220.5646 11226.2529 11/30/2017 11029.9068 11443.5785 12/31/2017 11326.5874 11628.0761 01/31/2018 11762.3616 12284.0678 02/28/2018 11181.3293 11768.1734 03/31/2018 10710.1262 11516.2723 04/30/2018 10990.0138 11626.234 05/31/2018 11021.8997 11640.735 06/30/2018 10784.5267 11577.7242 07/31/2018 11011.271 11926.8811 08/31/2018 10858.9272 12020.547 09/30/2018 10699.4976 12072.8827 10/31/2018 9760.6344 11168.1546 11/30/2018 9696.8626 11331.4912 12/31/2018 8997.149 10533.2767 01/31/2019 9908.899 11365.0749 02/28/2019 10025.603 11669.0756 03/31/2019 10124.072 11815.7857 04/30/2019 10663.828 12214.7749 05/31/2019 9555.14 11490.1989 06/30/2019 10200.659 12242.596 07/31/2019 10280.893 12278.4469 08/31/2019 9752.078 11987.1995 09/30/2019 10127.719 12239.3841 10/31/2019 10579.947 12574.3706 11/30/2019 11036.8672 12881.3471 12/31/2019 11601.1927 13334.9393 01/31/2020 11218.695 13187.6624 02/29/2020 10747.0716 12122.4789 03/31/2020 8730.6031 10485.9005 04/30/2020 9818.6791 11609.2296 05/31/2020 10297.7296 12114.1184 06/30/2020 10639.378 12501.2045 07/31/2020 11474.9313 13162.3447 08/31/2020 12176.796 13967.9751 09/30/2020 11857.429 13517.5948 10/31/2020 11805.439 13188.9849 11/30/2020 13380.7946 14814.6994 12/31/2020 14249.3741 15502.527 01/31/2021 14229.4338 15432.0533 02/28/2021 14871.513 15789.4762 03/31/2021 15226.4513 16211.2323 04/30/2021 15956.2681 16920.0321 05/31/2021 16135.7312 17183.3168 06/30/2021 16131.7431 17409.7586 07/31/2021 16071.9221 17529.7341 08/31/2021 16323.1705 17968.4946 09/30/2021 15808.7095 17226.2057 10/31/2021 16171.6239 18105.5217 11/30/2021 15627.8451 17669.5007 12/31/2021 16374.3608 18376.3167 01/31/2022 16301.2201 17473.8085 02/28/2022 15839.5199 17022.4836 03/31/2022 15967.516 17391.1955 04/30/2022 15039.5441 15999.1498 05/31/2022 15396.1047 16017.9018 06/30/2022 13905.8642 14667.6586 07/31/2022 14276.1387 15691.9371 08/31/2022 14011.0039 15114.2128 09/30/2022 12813.3259 13667.3279 10/31/2022 13663.5858 14492.1355 11/30/2022 15244.3387 15616.1731 12/31/2022 14744.5383 15001.7004 01/31/2023 15944.2876 16076.9449 02/28/2023 15492.0011 15616.1731 03/31/2023 15368.2175 16097.6808 04/30/2023 15492.0011 16329.035 05/31/2023 15168.2593 16154.1259 06/30/2023 15810.9821 17092.0599 07/31/2023 16886.9478 17717.7743 08/31/2023 16110.9194 17222.6631 09/30/2023 15696.7203 16510.5097 10/31/2023 14954.0183 16014.0759 11/30/2023 16046.6161 17492.1355 12/31/2023 17163.1849 18332.3414 01/31/2024 17077.2425 18439.7997 02/29/2024 17532.2312 19231.118 03/31/2024 18609.0378 19834.9157 04/30/2024 18568.5944 19180.4827 05/31/2024 19261.1883 19959.4729 06/30/2024 19291.5209 20404.0433 07/31/2024 19559.4587 20733.0783 08/31/2024 19716.177 21259.6476 09/30/2024 20287.4406 21753.5308
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year Global Opportunities Fund Class R6 29.25% 14.91% MSCI All Country World Net Total Return USD Index 31.76% 12.19%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fgo/THOGX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 1,306,000,000
Holdings Count | Holdings	37
Advisory Fees Paid, Amount	$ 9,300,000
Investment Company, Portfolio Turnover	14.91%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $1,306.0 Number of Holdings 37 Annual Portfolio Turnover 14.91% Total Advisory Fee $9.3
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 2.6 Mid Cap ($2.5-12 B) 17.7 Large Cap (>$12 B) 79.8 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 2.6% Mid Cap ($2.5-12 B) 17.7% Large Cap (>$12 B) 79.8% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg International Equity Fund - Class A
Shareholder Report [Line Items]
Class Name	CLASS: A
Trading Symbol	TGVAX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg International Equity Fund Class A Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $142.00 1.22%
Expenses Paid, Amount	$ 142
Expense Ratio, Percent	1.22%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class A shares outperformed the MSCI All Country World ex USA Net Total Return USD Index (the “Index”) during the 12-month period ended September 30, 2024. During the period, non-U.S. equities have posted strong returns but lagged their U.S. counterparts, as U.S. mega-cap and artificial intelligence beneficiaries have continued to lead the market. Stock selection was a major contributor of the Fund’s outperformance relative to its benchmark, consistent with the Fund’s bottom-up investment approach. Sector allocation was modestly additive to performance while geographic allocation detracted from relative results. The Fund’s cash allocation was a drag on performance. Within industrials and information technology, stock selection bolstered relative returns. Additionally, stock selection in Japan and the U.S. also drove positive relative performance. An underweight positioning and weaker stock selection within financials and India hampered relative returns.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg International Equity Fund MSCI All Country World ex USA Net Total Return USD Index MSCI EAFE Net Total Return USD Index 09/30/2014 9548.8 10000 10000 10/31/2014 9564.8 9900.9916 9854.8027 11/30/2014 9804.3005 9972.6147 9988.8459 12/31/2014 9377.735 9613.0446 9642.8195 01/31/2015 9573.3956 9598.8003 9689.957 02/28/2015 10100.9805 10111.9989 10269.2311 03/31/2015 10076.523 9948.5397 10113.2303 04/30/2015 10764.8291 10451.1052 10526.1436 05/31/2015 10873.1413 10287.947 10472.2625 06/30/2015 10570.8248 10000.9028 10175.5462 07/31/2015 10774.3799 9973.1163 10386.8244 08/31/2015 10061.9372 9210.8418 9622.7394 09/30/2015 9668.1645 8783.7614 9134.1379 10/31/2015 10207.0458 9437.6483 9848.1483 11/30/2015 10080.6553 9242.8415 9694.9419 12/31/2015 9964.9282 9068.7492 9564.3111 01/31/2016 9258.1664 8451.8776 8872.6782 02/29/2016 9001.9136 8355.2767 8710.1239 03/31/2016 9535.0848 9034.6429 9276.8694 04/30/2016 9758.2727 9272.3835 9545.445 05/31/2016 9696.2761 9115.896 9458.7334 06/30/2016 9248.343 8976.4115 9141.226 07/31/2016 9619.7792 9420.3444 9604.511 08/31/2016 9736.6355 9479.93 9611.3298 09/30/2016 9851.5887 9596.794 9729.3984 10/31/2016 9683.4011 9458.8142 9530.3854 11/30/2016 9506.8041 9240.0327 9340.5777 12/31/2016 9691.8105 9476.419 9659.9725 01/31/2017 9876.8168 9812.1147 9940.1874 02/28/2017 9872.6121 9968.552 10082.3268 03/31/2017 10356.1515 10221.2893 10359.8799 04/30/2017 10684.1173 10440.0708 10623.4864 05/31/2017 11087.7675 10778.8762 11013.4103 06/30/2017 11272.6617 10812.3304 10993.9322 07/31/2017 11614.5133 11210.8719 11311.0613 08/31/2017 11386.6122 11269.5045 11306.7993 09/30/2017 11701.3603 11478.7062 11588.1173 10/31/2017 11832.6459 11694.6789 11764.0795 11/30/2017 11940.1705 11789.6748 11887.4756 12/31/2017 12113.2165 12053.1957 12078.2834 01/31/2018 12874.6187 12724.4868 12684.1237 02/28/2018 12103.3282 12124.5179 12111.613 03/31/2018 11821.5105 11910.6517 11893.318 04/30/2018 11915.4497 12100.8441 12164.8742 05/31/2018 11668.2412 11821.4237 11891.4326 06/30/2018 11267.7634 11599.2316 11746.1521 07/31/2018 11594.0786 11876.6458 12035.2871 08/31/2018 11233.1542 11628.0714 11802.8554 09/30/2018 11218.3217 11681.0364 11905.29 10/31/2018 10224.5436 10730.9268 10957.723 11/30/2018 10392.6453 10832.4932 10943.915 12/31/2018 9684.0259 10342.216 10412.6559 01/31/2019 10547.0583 11123.6502 11096.9768 02/28/2019 10943.451 11340.9771 11379.8535 03/31/2019 11189.3149 11408.5376 11451.6124 04/30/2019 11826.5539 11709.9264 11773.5779 05/31/2019 11068.8918 11081.4186 11208.1415 06/30/2019 11676.025 11748.6972 11873.0695 07/31/2019 11575.6724 11606.5043 11722.319 08/31/2019 11374.9672 11248.0376 11418.6413 09/30/2019 11495.3903 11537.4893 11745.855 10/31/2019 11861.6773 11940.0432 12167.8726 11/30/2019 12038.5937 12045.3212 12305.043 12/31/2019 12460.7323 12566.946 12704.9525 01/31/2020 12300.2248 12229.3444 12439.5754 02/29/2020 11620.743 11262.6833 11315.0659 03/31/2020 10026.3685 9631.9034 9804.8628 04/30/2020 10684.4493 10361.8271 10438.2833 05/31/2020 11379.9818 10700.9334 10892.8165 06/30/2020 11877.555 11184.5398 11263.7119 07/31/2020 12685.4427 11683.1931 11526.2569 08/31/2020 13552.1832 12183.301 12118.8319 09/30/2020 13257.9195 11883.8181 11803.9447 10/31/2020 13076.011 11628.3222 11332.6268 11/30/2020 14635.7188 13192.4946 13089.3349 12/31/2020 15246.3722 13905.5658 13697.936 01/31/2021 15356.7331 13935.81 13552 02/28/2021 15781.623 14211.6693 13855.9629 03/31/2021 15880.9479 14391.329 14174.5556 04/30/2021 16294.8017 14814.9987 14601.061 05/31/2021 17050.7745 15278.3922 15077.2152 06/30/2021 16543.1139 15179.3838 14907.5391 07/31/2021 16129.2601 14929.2546 15019.785 08/31/2021 16344.4641 15213.0386 15284.7244 09/30/2021 15864.3938 14725.9212 14841.1473 10/31/2021 16416.1988 15077.4162 15206.1705 11/30/2021 15811.9318 14398.5013 14498.4184 12/31/2021 16353.298 14993.5549 15240.7933 01/31/2022 15806.0915 14441.0338 14504.2965 02/28/2022 14850.0525 14155.1934 14247.8395 03/31/2022 14573.3044 14177.7637 14339.4171 04/30/2022 13623.5552 13287.4905 13411.7322 05/31/2022 13831.1163 13382.8375 13512.2774 06/30/2022 12818.4697 12231.5513 12258.5056 07/31/2022 13252.4611 12650.3057 12869.3466 08/31/2022 12636.0676 12243.4383 12258.1214 09/30/2022 11441.0189 11019.9271 11111.4106 10/31/2022 11730.3465 11349.2529 11708.923 11/30/2022 13585.8168 12688.9762 13027.7676 12/31/2022 13571.6542 12594.0806 13038.2364 01/31/2023 14786.8353 13615.6126 14094.035 02/28/2023 14115.2878 13137.6739 13799.9409 03/31/2023 14652.5258 13458.8242 14141.9588 04/30/2023 14933.9361 13692.6526 14541.2266 05/31/2023 14435.0723 13194.8018 13925.87 06/30/2023 15049.0586 13786.846 14559.6312 07/31/2023 15592.6922 14347.342 15030.7292 08/31/2023 15055.4543 13699.3735 14454.8655 09/30/2023 14396.6982 13266.6757 13961.1207 10/31/2023 14083.3094 12719.3207 13395.1119 11/30/2023 15170.2993 13864.2371 14638.4169 12/31/2023 15711.7222 14560.8069 15416.1415 01/31/2024 15737.8866 14416.1563 15504.8593 02/29/2024 16228.4691 14781.1433 15788.6688 03/31/2024 16908.7435 15243.1825 16307.952 04/30/2024 16712.5105 14969.4799 15890.3251 05/31/2024 17615.1823 15404.0336 16505.8361 06/30/2024 17438.5726 15389.3378 16239.3678 07/31/2024 18020.7305 15745.6978 16715.7754 08/31/2024 18452.4431 16194.1448 17259.3077 09/30/2024 18995.3544 16630.2031 17418.6872
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year International Equity Fund Class A (with sales charge) 26.01% 9.55% 6.63% International Equity Fund Class A (without sales charge) 31.94% 10.57% 7.12% MSCI All Country World ex USA Net Total Return USD Index 25.35% 7.59% 5.22% MSCI EAFE Net Total Return USD Index 24.77% 8.20% 5.71%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment and assumes the deduction of the maximum sales charge associated with that investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fiv/TGVAX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 2,969,100,000
Holdings Count | Holdings	56
Advisory Fees Paid, Amount	$ 17,200,000
Investment Company, Portfolio Turnover	45.47%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $2,969.1 Number of Holdings 56 Annual Portfolio Turnover 45.47% Total Advisory Fee $17.2
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 0.0 Mid Cap ($2.5-12 B) 3.5 Large Cap (>$12 B) 96.5 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 0.0% Mid Cap ($2.5-12 B) 3.5% Large Cap (>$12 B) 96.5% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg International Equity Fund - Class C
Shareholder Report [Line Items]
Class Name	CLASS: C
Trading Symbol	THGCX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg International Equity Fund Class C Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $244.00 2.11%
Expenses Paid, Amount	$ 244
Expense Ratio, Percent	2.11%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class C shares outperformed the MSCI All Country World ex USA Net Total Return USD Index (the “Index”) during the 12-month period ended September 30, 2024. During the period, non-U.S. equities have posted strong returns but lagged their U.S. counterparts, as U.S. mega-cap and artificial intelligence beneficiaries have continued to lead the market. Stock selection was a major contributor of the Fund’s outperformance relative to its benchmark, consistent with the Fund’s bottom-up investment approach. Sector allocation was modestly additive to performance while geographic allocation detracted from relative results. The Fund’s cash allocation was a drag on performance. Within industrials and information technology, stock selection bolstered relative returns. Additionally, stock selection in Japan and the U.S. also drove positive relative performance. An underweight positioning and weaker stock selection within financials and India hampered relative returns.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg International Equity Fund MSCI All Country World ex USA Net Total Return USD Index MSCI EAFE Net Total Return USD Index 09/30/2014 10000.0127 10000 10000 10/31/2014 10007.1914 9900.9916 9854.8027 11/30/2014 10254.3385 9972.6147 9988.8459 12/31/2014 9800.9556 9613.0446 9642.8195 01/31/2015 10002.021 9598.8003 9689.957 02/28/2015 10546.0805 10111.9989 10269.2311 03/31/2015 10510.5984 9948.5397 10113.2303 04/30/2015 11224.1836 10451.1052 10526.1436 05/31/2015 11330.63 10287.947 10472.2625 06/30/2015 11010.9272 10000.9028 10175.5462 07/31/2015 11212.3466 9973.1163 10386.8244 08/31/2015 10465.91 9210.8418 9622.7394 09/30/2015 10052.0754 8783.7614 9134.1379 10/31/2015 10602.1693 9437.6483 9848.1483 11/30/2015 10468.6864 9242.8415 9694.9419 12/31/2015 10341.4791 9068.7492 9564.3111 01/31/2016 9597.0811 8451.8776 8872.6782 02/29/2016 9328.5324 8355.2767 8710.1239 03/31/2016 9875.0525 9034.6429 9276.8694 04/30/2016 10101.1987 9272.3835 9545.445 05/31/2016 10030.528 9115.896 9458.7334 06/30/2016 9559.0391 8976.4115 9141.226 07/31/2016 9938.5543 9420.3444 9604.511 08/31/2016 10047.6649 9479.93 9611.3298 09/30/2016 10164.3357 9596.794 9729.3984 10/31/2016 9982.9149 9458.8142 9530.3854 11/30/2016 9796.72 9240.0327 9340.5777 12/31/2016 9982.9149 9476.419 9659.9725 01/31/2017 10164.3357 9812.1147 9940.1874 02/28/2017 10154.7872 9968.552 10082.3268 03/31/2017 10646.5329 10221.2893 10359.8799 04/30/2017 10975.9548 10440.0708 10623.4864 05/31/2017 11381.7643 10778.8762 11013.4103 06/30/2017 11565.3692 10812.3304 10993.9322 07/31/2017 11909.8899 11210.8719 11311.0613 08/31/2017 11670.6394 11269.5045 11306.7993 09/30/2017 11987.525 11478.7062 11588.1173 10/31/2017 12112.1953 11694.6789 11764.0795 11/30/2017 12213.8571 11789.6748 11887.4756 12/31/2017 12384.8397 12053.1957 12078.2834 01/31/2018 13154.2614 12724.4868 12684.1237 02/28/2018 12362.042 12124.5179 12111.613 03/31/2018 12065.6721 11910.6517 11893.318 04/30/2018 12151.1634 12100.8441 12164.8742 05/31/2018 11888.9901 11821.4237 11891.4326 06/30/2018 11478.6319 11599.2316 11746.1521 07/31/2018 11797.7994 11876.6458 12035.2871 08/31/2018 11427.3371 11628.0714 11802.8554 09/30/2018 11404.5394 11681.0364 11905.29 10/31/2018 10390.0427 10730.9268 10957.723 11/30/2018 10549.6264 10832.4932 10943.915 12/31/2018 9820.1007 10342.216 10412.6559 01/31/2019 10686.4125 11123.6502 11096.9768 02/28/2019 11085.3719 11340.9771 11379.8535 03/31/2019 11330.447 11408.5376 11451.6124 04/30/2019 11963.0826 11709.9264 11773.5779 05/31/2019 11187.9615 11081.4186 11208.1415 06/30/2019 11792.1 11748.6972 11873.0695 07/31/2019 11683.811 11606.5043 11722.319 08/31/2019 11472.9325 11248.0376 11418.6413 09/30/2019 11586.9209 11537.4893 11745.855 10/31/2019 11951.6837 11940.0432 12167.8726 11/30/2019 12124.0549 12045.3212 12305.043 12/31/2019 12536.479 12566.946 12704.9525 01/31/2020 12384.8525 12229.3444 12439.5754 02/29/2020 11687.3706 11262.6833 11315.0659 03/31/2020 10080.1297 9631.9034 9804.8628 04/30/2020 10735.1562 10361.8271 10438.2833 05/31/2020 11432.6381 10700.9334 10892.8165 06/30/2020 11923.908 11184.5398 11263.7119 07/31/2020 12730.5609 11683.1931 11526.2569 08/31/2020 13585.7344 12183.301 12118.8319 09/30/2020 13288.5465 11883.8181 11803.9447 10/31/2020 13094.4645 11628.3222 11332.6268 11/30/2020 14643.9458 13192.4946 13089.3349 12/31/2020 15251.7604 13905.5658 13697.936 01/31/2021 15352.0185 13935.81 13552 02/28/2021 15765.5831 14211.6693 13855.9629 03/31/2021 15853.3089 14391.329 14174.5556 04/30/2021 16260.6074 14814.9987 14601.061 05/31/2021 17000.0107 15278.3922 15077.2152 06/30/2021 16486.188 15179.3838 14907.5391 07/31/2021 16066.3573 14929.2546 15019.785 08/31/2021 16273.1396 15213.0386 15284.7244 09/30/2021 15790.6476 14725.9212 14841.1473 10/31/2021 16329.5348 15077.4162 15206.1705 11/30/2021 15718.8225 14398.5013 14498.4184 12/31/2021 16243.021 14993.5549 15240.7933 01/31/2022 15692.4101 14441.0338 14504.2965 02/28/2022 14736.0859 14155.1934 14247.8395 03/31/2022 14453.5356 14177.7637 14339.4171 04/30/2022 13504.4563 13287.4905 13411.7322 05/31/2022 13707.313 13382.8375 13512.2774 06/30/2022 12693.0298 12231.5513 12258.5056 07/31/2022 13113.2328 12650.3057 12869.3466 08/31/2022 12497.418 12243.4383 12258.1214 09/30/2022 11309.2577 11019.9271 11111.4106 10/31/2022 11591.808 11349.2529 11708.923 11/30/2022 13403.028 12688.9762 13027.7676 12/31/2022 13384.2696 12594.0806 13038.2364 01/31/2023 14571.702 13615.6126 14094.035 02/28/2023 13904.6875 13137.6739 13799.9409 03/31/2023 14425.1054 13458.8242 14141.9588 04/30/2023 14688.9793 13692.6526 14541.2266 05/31/2023 14190.5509 13194.8018 13925.87 06/30/2023 14776.9373 13786.846 14559.6312 07/31/2023 15304.685 14347.342 15030.7292 08/31/2023 14762.2776 13699.3735 14454.8655 09/30/2023 14102.5929 13266.6757 13961.1207 10/31/2023 13780.0804 12719.3207 13395.1119 11/30/2023 14835.2046 13864.2371 14638.4169 12/31/2023 15352.4953 14560.8069 15416.1415 01/31/2024 15374.8208 14416.1563 15504.8593 02/29/2024 15836.2142 14781.1433 15788.6688 03/31/2024 16491.0953 15243.1825 16307.952 04/30/2024 16290.1659 14969.4799 15890.3251 05/31/2024 17153.4181 15404.0336 16505.8361 06/30/2024 16967.3724 15389.3378 16239.3678 07/31/2024 17525.5097 15745.6978 16715.7754 08/31/2024 17934.8103 16194.1448 17259.3077 09/30/2024 18440.8547 16630.2031 17418.6872
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year International Equity Fund Class C (with sales charge) 29.76% 9.74% 6.31% International Equity Fund Class C (without sales charge) 30.76% 9.74% 6.31% MSCI All Country World ex USA Net Total Return USD Index 25.35% 7.59% 5.22% MSCI EAFE Net Total Return USD Index 24.77% 8.20% 5.71%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fiv/THGCX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 2,969,100,000
Holdings Count | Holdings	56
Advisory Fees Paid, Amount	$ 17,200,000
Investment Company, Portfolio Turnover	45.47%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $2,969.1 Number of Holdings 56 Annual Portfolio Turnover 45.47% Total Advisory Fee $17.2
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 0.0 Mid Cap ($2.5-12 B) 3.5 Large Cap (>$12 B) 96.5 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 0.0% Mid Cap ($2.5-12 B) 3.5% Large Cap (>$12 B) 96.5% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg International Equity Fund - Class I
Shareholder Report [Line Items]
Class Name	CLASS: I
Trading Symbol	TGVIX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg International Equity Fund Class I Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $108.00 0.93%
Expenses Paid, Amount	$ 108
Expense Ratio, Percent	0.93%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class I shares outperformed the MSCI All Country World ex USA Net Total Return USD Index (the “Index”) during the 12-month period ended September 30, 2024. During the period, non-U.S. equities have posted strong returns but lagged their U.S. counterparts, as U.S. mega-cap and artificial intelligence beneficiaries have continued to lead the market. Stock selection was a major contributor of the Fund’s outperformance relative to its benchmark, consistent with the Fund’s bottom-up investment approach. Sector allocation was modestly additive to performance while geographic allocation detracted from relative results. The Fund’s cash allocation was a drag on performance. Within industrials and information technology, stock selection bolstered relative returns. Additionally, stock selection in Japan and the U.S. also drove positive relative performance. An underweight positioning and weaker stock selection within financials and India hampered relative returns.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg International Equity Fund MSCI All Country World ex USA Net Total Return USD Index MSCI EAFE Net Total Return USD Index 09/30/2014 9999.9979 10000 10000 10/31/2014 10019.7153 9900.9916 9854.8027 11/30/2014 10275.8545 9972.6147 9988.8459 12/31/2014 9829.3356 9613.0446 9642.8195 01/31/2015 10040.912 9598.8003 9689.957 02/28/2015 10593.1622 10111.9989 10269.2311 03/31/2015 10571.6459 9948.5397 10113.2303 04/30/2015 11299.612 10451.1052 10526.1436 05/31/2015 11417.9514 10287.947 10472.2625 06/30/2015 11103.816 10000.9028 10175.5462 07/31/2015 11316.7264 9973.1163 10386.8244 08/31/2015 10573.3445 9210.8418 9622.7394 09/30/2015 10165.2571 8783.7614 9134.1379 10/31/2015 10730.7992 9437.6483 9848.1483 11/30/2015 10605.1273 9242.8415 9694.9419 12/31/2015 10485.7049 9068.7492 9564.3111 01/31/2016 9743.3916 8451.8776 8872.6782 02/29/2016 9476.1589 8355.2767 8710.1239 03/31/2016 10040.3169 9034.6429 9276.8694 04/30/2016 10277.8572 9272.3835 9545.445 05/31/2016 10218.4721 9115.896 9458.7334 06/30/2016 9747.9024 8976.4115 9141.226 07/31/2016 10142.6238 9420.3444 9604.511 08/31/2016 10267.0469 9479.93 9611.3298 09/30/2016 10390.4275 9596.794 9729.3984 10/31/2016 10217.3979 9458.8142 9530.3854 11/30/2016 10035.7168 9240.0327 9340.5777 12/31/2016 10234.7008 9476.419 9659.9725 01/31/2017 10429.3591 9812.1147 9940.1874 02/28/2017 10429.3591 9968.552 10082.3268 03/31/2017 10946.6445 10221.2893 10359.8799 04/30/2017 11293.0573 10440.0708 10623.4864 05/31/2017 11726.0733 10778.8762 11013.4103 06/30/2017 11927.2613 10812.3304 10993.9322 07/31/2017 12292.6478 11210.8719 11311.0613 08/31/2017 12057.7565 11269.5045 11306.7993 09/30/2017 12394.5409 11478.7062 11588.1173 10/31/2017 12538.7143 11694.6789 11764.0795 11/30/2017 12648.7251 11789.6748 11887.4756 12/31/2017 12841.5574 12053.1957 12078.2834 01/31/2018 13649.2345 12724.4868 12684.1237 02/28/2018 12841.5574 12124.5179 12111.613 03/31/2018 12546.9331 11910.6517 11893.318 04/30/2018 12648.5277 12100.8441 12164.8742 05/31/2018 12384.3817 11821.4237 11891.4326 06/30/2018 11967.8439 11599.2316 11746.1521 07/31/2018 12313.2655 11876.6458 12035.2871 08/31/2018 11937.3655 11628.0714 11802.8554 09/30/2018 11922.1263 11681.0364 11905.29 10/31/2018 10870.6222 10730.9268 10957.723 11/30/2018 11048.4127 10832.4932 10943.915 12/31/2018 10296.1977 10342.216 10412.6559 01/31/2019 11216.7015 11123.6502 11096.9768 02/28/2019 11645.9252 11340.9771 11379.8535 03/31/2019 11909.6651 11408.5376 11451.6124 04/30/2019 12592.2859 11709.9264 11773.5779 05/31/2019 11785.5522 11081.4186 11208.1415 06/30/2019 12437.1449 11748.6972 11873.0695 07/31/2019 12333.7175 11606.5043 11722.319 08/31/2019 12121.6913 11248.0376 11418.6413 09/30/2019 12250.9755 11537.4893 11745.855 10/31/2019 12643.9997 11940.0432 12167.8726 11/30/2019 12836.6916 12045.3212 12305.043 12/31/2019 13291.1757 12566.946 12704.9525 01/31/2020 13125.6567 12229.3444 12439.5754 02/29/2020 12402.8904 11262.6833 11315.0659 03/31/2020 10703.562 9631.9034 9804.8628 04/30/2020 11409.7764 10361.8271 10438.2833 05/31/2020 12154.6119 10700.9334 10892.8165 06/30/2020 12689.79 11184.5398 11263.7119 07/31/2020 13561.5234 11683.1931 11526.2569 08/31/2020 14482.9125 12183.301 12118.8319 09/30/2020 14179.461 11883.8181 11803.9447 10/31/2020 13980.8382 11628.3222 11332.6268 11/30/2020 15655.41 13192.4946 13089.3349 12/31/2020 16316.6376 13905.5658 13697.936 01/31/2021 16441.9749 13935.81 13552 02/28/2021 16892.0498 14211.6693 13855.9629 03/31/2021 17005.9927 14391.329 14174.5556 04/30/2021 17456.0676 14814.9987 14601.061 05/31/2021 18265.0629 15278.3922 15077.2152 06/30/2021 17729.5308 15179.3838 14907.5391 07/31/2021 17290.8502 14929.2546 15019.785 08/31/2021 17524.4334 15213.0386 15284.7244 09/30/2021 17023.0842 14725.9212 14841.1473 10/31/2021 17621.285 15077.4162 15206.1705 11/30/2021 16969.0655 14398.5013 14498.4184 12/31/2021 17557.2342 14993.5549 15240.7933 01/31/2022 16972.8588 14441.0338 14504.2965 02/28/2022 15953.4484 14155.1934 14247.8395 03/31/2022 15667.7538 14177.7637 14339.4171 04/30/2022 14648.3434 13287.4905 13411.7322 05/31/2022 14882.0935 13382.8375 13512.2774 06/30/2022 13797.7525 12231.5513 12258.5056 07/31/2022 14265.2528 12650.3057 12869.3466 08/31/2022 13609.4538 12243.4383 12258.1214 09/30/2022 12317.3348 11019.9271 11111.4106 10/31/2022 12635.4948 11349.2529 11708.923 11/30/2022 14635.3572 12688.9762 13027.7676 12/31/2022 14624.1139 12594.0806 13038.2364 01/31/2023 15935.5154 13615.6126 14094.035 02/28/2023 15213.5823 13137.6739 13799.9409 03/31/2023 15796.4274 13458.8242 14141.9588 04/30/2023 16101.0964 13692.6526 14541.2266 05/31/2023 15571.2372 13194.8018 13925.87 06/30/2023 16233.5612 13786.846 14559.6312 07/31/2023 16823.0296 14347.342 15030.7292 08/31/2023 16246.8077 13699.3735 14454.8655 09/30/2023 15531.4978 13266.6757 13961.1207 10/31/2023 15200.3358 12719.3207 13395.1119 11/30/2023 16378.9746 13864.2371 14638.4169 12/31/2023 16963.5327 14560.8069 15416.1415 01/31/2024 17004.2289 14416.1563 15504.8593 02/29/2024 17533.2795 14781.1433 15788.6688 03/31/2024 18279.3765 15243.1825 16307.952 04/30/2024 18069.1128 14969.4799 15890.3251 05/31/2024 19045.8216 15404.0336 16505.8361 06/30/2024 18855.906 15389.3378 16239.3678 07/31/2024 19493.4798 15745.6978 16715.7754 08/31/2024 19968.2688 16194.1448 17259.3077 09/30/2024 20558.3637 16630.2031 17418.6872
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year International Equity Fund Class I 32.37% 10.91% 7.47% MSCI All Country World ex USA Net Total Return USD Index 25.35% 7.59% 5.22% MSCI EAFE Net Total Return USD Index 24.77% 8.20% 5.71%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fiv/TGVIX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 2,969,100,000
Holdings Count | Holdings	56
Advisory Fees Paid, Amount	$ 17,200,000
Investment Company, Portfolio Turnover	45.47%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $2,969.1 Number of Holdings 56 Annual Portfolio Turnover 45.47% Total Advisory Fee $17.2
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 0.0 Mid Cap ($2.5-12 B) 3.5 Large Cap (>$12 B) 96.5 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 0.0% Mid Cap ($2.5-12 B) 3.5% Large Cap (>$12 B) 96.5% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg International Equity Fund - Class R3
Shareholder Report [Line Items]
Class Name	CLASS: R3
Trading Symbol	TGVRX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg International Equity Fund Class R3 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R3 $164.00 1.42%
Expenses Paid, Amount	$ 164
Expense Ratio, Percent	1.42%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R3 shares outperformed the MSCI All Country World ex USA Net Total Return USD Index (the “Index”) during the 12-month period ended September 30, 2024. During the period, non-U.S. equities have posted strong returns but lagged their U.S. counterparts, as U.S. mega-cap and artificial intelligence beneficiaries have continued to lead the market. Stock selection was a major contributor of the Fund’s outperformance relative to its benchmark, consistent with the Fund’s bottom-up investment approach. Sector allocation was modestly additive to performance while geographic allocation detracted from relative results. The Fund’s cash allocation was a drag on performance. Within industrials and information technology, stock selection bolstered relative returns. Additionally, stock selection in Japan and the U.S. also drove positive relative performance. An underweight positioning and weaker stock selection within financials and India hampered relative returns.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg International Equity Fund MSCI All Country World ex USA Net Total Return USD Index MSCI EAFE Net Total Return USD Index 09/30/2014 9999.9946 10000 10000 10/31/2014 10013.3904 9900.9916 9854.8027 11/30/2014 10267.7119 9972.6147 9988.8459 12/31/2014 9816.7359 9613.0446 9642.8195 01/31/2015 10021.4797 9598.8003 9689.957 02/28/2015 10569.9007 10111.9989 10269.2311 03/31/2015 10540.6516 9948.5397 10113.2303 04/30/2015 11260.9112 10451.1052 10526.1436 05/31/2015 11374.2515 10287.947 10472.2625 06/30/2015 11057.7331 10000.9028 10175.5462 07/31/2015 11266.8541 9973.1163 10386.8244 08/31/2015 10518.4209 9210.8418 9622.7394 09/30/2015 10109.4819 8783.7614 9134.1379 10/31/2015 10668.8708 9437.6483 9848.1483 11/30/2015 10533.1142 9242.8415 9694.9419 12/31/2015 10412.1928 9068.7492 9564.3111 01/31/2016 9673.7088 8451.8776 8872.6782 02/29/2016 9405.9544 8355.2767 8710.1239 03/31/2016 9958.7377 9034.6429 9276.8694 04/30/2016 10191.9432 9272.3835 9545.445 05/31/2016 10127.1639 9115.896 9458.7334 06/30/2016 9654.3034 8976.4115 9141.226 07/31/2016 10041.869 9420.3444 9604.511 08/31/2016 10159.4451 9479.93 9611.3298 09/30/2016 10278.7447 9596.794 9729.3984 10/31/2016 10103.3395 9458.8142 9530.3854 11/30/2016 9914.7789 9240.0327 9340.5777 12/31/2016 10112.1098 9476.419 9659.9725 01/31/2017 10300.6704 9812.1147 9940.1874 02/28/2017 10296.2852 9968.552 10082.3268 03/31/2017 10800.5752 10221.2893 10359.8799 04/30/2017 11138.2302 10440.0708 10623.4864 05/31/2017 11559.2027 10778.8762 11013.4103 06/30/2017 11747.6796 10812.3304 10993.9322 07/31/2017 12104.0699 11210.8719 11311.0613 08/31/2017 11866.4764 11269.5045 11306.7993 09/30/2017 12193.4782 11478.7062 11588.1173 10/31/2017 12330.2852 11694.6789 11764.0795 11/30/2017 12432.7653 11789.6748 11887.4756 12/31/2017 12618.2521 12053.1957 12078.2834 01/31/2018 13406.5708 12724.4868 12684.1237 02/28/2018 12602.7949 12124.5179 12111.613 03/31/2018 12309.1075 11910.6517 11893.318 04/30/2018 12401.8509 12100.8441 12164.8742 05/31/2018 12144.2304 11821.4237 11891.4326 06/30/2018 11726.8852 11599.2316 11746.1521 07/31/2018 12061.7918 11876.6458 12035.2871 08/31/2018 11685.6659 11628.0714 11802.8554 09/30/2018 11670.2086 11681.0364 11905.29 10/31/2018 10634.5742 10730.9268 10957.723 11/30/2018 10804.6038 10832.4932 10943.915 12/31/2018 10066.554 10342.216 10412.6559 01/31/2019 10957.9993 11123.6502 11096.9768 02/28/2019 11369.8365 11340.9771 11379.8535 03/31/2019 11630.493 11408.5376 11451.6124 04/30/2019 12287.3474 11709.9264 11773.5779 05/31/2019 11494.9517 11081.4186 11208.1415 06/30/2019 12130.9535 11748.6972 11873.0695 07/31/2019 12021.4778 11606.5043 11722.319 08/31/2019 11812.9526 11248.0376 11418.6413 09/30/2019 11932.8546 11537.4893 11745.855 10/31/2019 12308.1999 11940.0432 12167.8726 11/30/2019 12492.0079 12045.3212 12305.043 12/31/2019 12926.7936 12566.946 12704.9525 01/31/2020 12760.4256 12229.3444 12439.5754 02/29/2020 12050.5888 11262.6833 11315.0659 03/31/2020 10398 9631.9034 9804.8628 04/30/2020 11074.5632 10361.8271 10438.2833 05/31/2020 11801.0368 10700.9334 10892.8165 06/30/2020 12311.232 11184.5398 11263.7119 07/31/2020 13148.6176 11683.1931 11526.2569 08/31/2020 14041.4592 12183.301 12118.8319 09/30/2020 13736.4512 11883.8181 11803.9447 10/31/2020 13542.3552 11628.3222 11332.6268 11/30/2020 15159.0138 13192.4946 13089.3349 12/31/2020 15786.8344 13905.5658 13697.936 01/31/2021 15900.9836 13935.81 13552 02/28/2021 16334.7505 14211.6693 13855.9629 03/31/2021 16437.4848 14391.329 14174.5556 04/30/2021 16859.8368 14814.9987 14601.061 05/31/2021 17641.7589 15278.3922 15077.2152 06/30/2021 17110.9651 15179.3838 14907.5391 07/31/2021 16677.1981 14929.2546 15019.785 08/31/2021 16905.4965 15213.0386 15284.7244 09/30/2021 16408.9475 14725.9212 14841.1473 10/31/2021 16979.6935 15077.4162 15206.1705 11/30/2021 16348.9257 14398.5013 14498.4184 12/31/2021 16906.8849 14993.5549 15240.7933 01/31/2022 16334.4317 14441.0338 14504.2965 02/28/2022 15345.6489 14155.1934 14247.8395 03/31/2022 15065.9274 14177.7637 14339.4171 04/30/2022 14083.6498 13287.4905 13411.7322 05/31/2022 14304.8249 13382.8375 13512.2774 06/30/2022 13250.9905 12231.5513 12258.5056 07/31/2022 13693.3407 12650.3057 12869.3466 08/31/2022 13062.3412 12243.4383 12258.1214 09/30/2022 11819.8575 11019.9271 11111.4106 10/31/2022 12119.0945 11349.2529 11708.923 11/30/2022 14025.1034 12688.9762 13027.7676 12/31/2022 14010.656 12594.0806 13038.2364 01/31/2023 15259.7192 13615.6126 14094.035 02/28/2023 14565.7952 13137.6739 13799.9409 03/31/2023 15120.9344 13458.8242 14141.9588 04/30/2023 15405.1128 13692.6526 14541.2266 05/31/2023 14889.6264 13194.8018 13925.87 06/30/2023 15517.4624 13786.846 14559.6312 07/31/2023 16079.2104 14347.342 15030.7292 08/31/2023 15517.4624 13699.3735 14454.8655 09/30/2023 14830.1472 13266.6757 13961.1207 10/31/2023 14506.316 12719.3207 13395.1119 11/30/2023 15622.886 13864.2371 14638.4169 12/31/2023 16175.3055 14560.8069 15416.1415 01/31/2024 16209.0181 14416.1563 15504.8593 02/29/2024 16707.9646 14781.1433 15788.6688 03/31/2024 17409.1866 15243.1825 16307.952 04/30/2024 17200.1685 14969.4799 15890.3251 05/31/2024 18123.8938 15404.0336 16505.8361 06/30/2024 17941.8457 15389.3378 16239.3678 07/31/2024 18535.1875 15745.6978 16715.7754 08/31/2024 18980.1938 16194.1448 17259.3077 09/30/2024 19533.0804 16630.2031 17418.6872
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year International Equity Fund Class R3 31.71% 10.36% 6.92% MSCI All Country World ex USA Net Total Return USD Index 25.35% 7.59% 5.22% MSCI EAFE Net Total Return USD Index 24.77% 8.20% 5.71%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fiv/TGVRX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 2,969,100,000
Holdings Count | Holdings	56
Advisory Fees Paid, Amount	$ 17,200,000
Investment Company, Portfolio Turnover	45.47%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $2,969.1 Number of Holdings 56 Annual Portfolio Turnover 45.47% Total Advisory Fee $17.2
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 0.0 Mid Cap ($2.5-12 B) 3.5 Large Cap (>$12 B) 96.5 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 0.0% Mid Cap ($2.5-12 B) 3.5% Large Cap (>$12 B) 96.5% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg International Equity Fund - Class R4
Shareholder Report [Line Items]
Class Name	CLASS: R4
Trading Symbol	THVRX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg International Equity Fund Class R4 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R4 $141.00 1.22%
Expenses Paid, Amount	$ 141
Expense Ratio, Percent	1.22%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R4 shares outperformed the MSCI All Country World ex USA Net Total Return USD Index (the “Index”) during the 12-month period ended September 30, 2024. During the period, non-U.S. equities have posted strong returns but lagged their U.S. counterparts, as U.S. mega-cap and artificial intelligence beneficiaries have continued to lead the market. Stock selection was a major contributor of the Fund’s outperformance relative to its benchmark, consistent with the Fund’s bottom-up investment approach. Sector allocation was modestly additive to performance while geographic allocation detracted from relative results. The Fund’s cash allocation was a drag on performance. Within industrials and information technology, stock selection bolstered relative returns. Additionally, stock selection in Japan and the U.S. also drove positive relative performance. An underweight positioning and weaker stock selection within financials and India hampered relative returns.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg International Equity Fund MSCI All Country World ex USA Net Total Return USD Index MSCI EAFE Net Total Return USD Index 09/30/2014 10000.0077 10000 10000 10/31/2014 10016.8484 9900.9916 9854.8027 11/30/2014 10269.0231 9972.6147 9988.8459 12/31/2014 9819.6274 9613.0446 9642.8195 01/31/2015 10029.417 9598.8003 9689.957 02/28/2015 10577.8145 10111.9989 10269.2311 03/31/2015 10552.0508 9948.5397 10113.2303 04/30/2015 11273.4328 10451.1052 10526.1436 05/31/2015 11391.2094 10287.947 10472.2625 06/30/2015 11072.9643 10000.9028 10175.5462 07/31/2015 11287.399 9973.1163 10386.8244 08/31/2015 10540.5747 9210.8418 9622.7394 09/30/2015 10129.7196 8783.7614 9134.1379 10/31/2015 10690.0081 9437.6483 9848.1483 11/30/2015 10561.1543 9242.8415 9694.9419 12/31/2015 10439.1105 9068.7492 9564.3111 01/31/2016 9698.1297 8451.8776 8872.6782 02/29/2016 9432.2484 8355.2767 8710.1239 03/31/2016 9985.8046 9034.6429 9276.8694 04/30/2016 10221.1749 9272.3835 9545.445 05/31/2016 10160.153 9115.896 9458.7334 06/30/2016 9686.556 8976.4115 9141.226 07/31/2016 10078.4212 9420.3444 9604.511 08/31/2016 10197.3017 9479.93 9611.3298 09/30/2016 10318.7408 9596.794 9729.3984 10/31/2016 10145.7266 9458.8142 9530.3854 11/30/2016 9959.4037 9240.0327 9340.5777 12/31/2016 10154.5991 9476.419 9659.9725 01/31/2017 10345.3583 9812.1147 9940.1874 02/28/2017 10345.3583 9968.552 10082.3268 03/31/2017 10851.092 10221.2893 10359.8799 04/30/2017 11197.1202 10440.0708 10623.4864 05/31/2017 11618.5649 10778.8762 11013.4103 06/30/2017 11815.4804 10812.3304 10993.9322 07/31/2017 12171.7708 11210.8719 11311.0613 08/31/2017 11935.7284 11269.5045 11306.7993 09/30/2017 12268.6951 11478.7062 11588.1173 10/31/2017 12407.2487 11694.6789 11764.0795 11/30/2017 12516.3206 11789.6748 11887.4756 12/31/2017 12699.155 12053.1957 12078.2834 01/31/2018 13493.1787 12724.4868 12684.1237 02/28/2018 12688.7074 12124.5179 12111.613 03/31/2018 12396.1723 11910.6517 11893.318 04/30/2018 12490.2014 12100.8441 12164.8742 05/31/2018 12234.2333 11821.4237 11891.4326 06/30/2018 11816.3261 11599.2316 11746.1521 07/31/2018 12155.8757 11876.6458 12035.2871 08/31/2018 11779.7592 11628.0714 11802.8554 09/30/2018 11764.0877 11681.0364 11905.29 10/31/2018 10719.3197 10730.9268 10957.723 11/30/2018 10891.7064 10832.4932 10943.915 12/31/2018 10149.9596 10342.216 10412.6559 01/31/2019 11056.3006 11123.6502 11096.9768 02/28/2019 11475.0196 11340.9771 11379.8535 03/31/2019 11734.7314 11408.5376 11451.6124 04/30/2019 12402.5616 11709.9264 11773.5779 05/31/2019 11607.5256 11081.4186 11208.1415 06/30/2019 12243.5544 11748.6972 11873.0695 07/31/2019 12137.5496 11606.5043 11722.319 08/31/2019 11925.54 11248.0376 11418.6413 09/30/2019 12052.7458 11537.4893 11745.855 10/31/2019 12434.363 11940.0432 12167.8726 11/30/2019 12621.2384 12045.3212 12305.043 12/31/2019 13060.9631 12566.946 12704.9525 01/31/2020 12897.0653 12229.3444 12439.5754 02/29/2020 12179.3057 11262.6833 11315.0659 03/31/2020 10512.069 9631.9034 9804.8628 04/30/2020 11201.5703 10361.8271 10438.2833 05/31/2020 11930.6331 10700.9334 10892.8165 06/30/2020 12450.585 11184.5398 11263.7119 07/31/2020 13303.9841 11683.1931 11526.2569 08/31/2020 14208.2481 12183.301 12118.8319 09/30/2020 13903.059 11883.8181 11803.9447 10/31/2020 13705.2513 11628.3222 11332.6268 11/30/2020 15341.3804 13192.4946 13089.3349 12/31/2020 15981.7603 13905.5658 13697.936 01/31/2021 16104.1143 13935.81 13552 02/28/2021 16541.0928 14211.6693 13855.9629 03/31/2021 16645.9677 14391.329 14174.5556 04/30/2021 17082.9462 14814.9987 14601.061 05/31/2021 17875.3338 15278.3922 15077.2152 06/30/2021 17339.3069 15179.3838 14907.5391 07/31/2021 16908.1548 14929.2546 15019.785 08/31/2021 17135.3836 15213.0386 15284.7244 09/30/2021 16640.1413 14725.9212 14841.1473 10/31/2021 17216.9529 15077.4162 15206.1705 11/30/2021 16578.8532 14398.5013 14498.4184 12/31/2021 17149.1978 14993.5549 15240.7933 01/31/2022 16576.2254 14441.0338 14504.2965 02/28/2022 15576.8549 14155.1934 14247.8395 03/31/2022 15290.3686 14177.7637 14339.4171 04/30/2022 14297.6606 13287.4905 13411.7322 05/31/2022 14524.1846 13382.8375 13512.2774 06/30/2022 13458.1894 12231.5513 12258.5056 07/31/2022 13911.2374 12650.3057 12869.3466 08/31/2022 13264.9778 12243.4383 12258.1214 09/30/2022 12012.4334 11019.9271 11111.4106 10/31/2022 12312.2446 11349.2529 11708.923 11/30/2022 14257.6858 12688.9762 13027.7676 12/31/2022 14242.7855 12594.0806 13038.2364 01/31/2023 15518.4614 13615.6126 14094.035 02/28/2023 14812.7683 13137.6739 13799.9409 03/31/2023 15375.9657 13458.8242 14141.9588 04/30/2023 15674.5281 13692.6526 14541.2266 05/31/2023 15145.2583 13194.8018 13925.87 06/30/2023 15789.8818 13786.846 14559.6312 07/31/2023 16359.8646 14347.342 15030.7292 08/31/2023 15796.6673 13699.3735 14454.8655 09/30/2023 15097.7598 13266.6757 13961.1207 10/31/2023 14772.0553 12719.3207 13395.1119 11/30/2023 15911.6941 13864.2371 14638.4169 12/31/2023 16478.2963 14560.8069 15416.1415 01/31/2024 16512.9874 14416.1563 15504.8593 02/29/2024 17026.4164 14781.1433 15788.6688 03/31/2024 17741.0541 15243.1825 16307.952 04/30/2024 17532.9072 14969.4799 15890.3251 05/31/2024 18476.5065 15404.0336 16505.8361 06/30/2024 18289.1743 15389.3378 16239.3678 07/31/2024 18906.6768 15745.6978 16715.7754 08/31/2024 19357.6617 16194.1448 17259.3077 09/30/2024 19926.5966 16630.2031 17418.6872
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year International Equity Fund Class R4 31.98% 10.58% 7.14% MSCI All Country World ex USA Net Total Return USD Index 25.35% 7.59% 5.22% MSCI EAFE Net Total Return USD Index 24.77% 8.20% 5.71%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fiv/THVRX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 2,969,100,000
Holdings Count | Holdings	56
Advisory Fees Paid, Amount	$ 17,200,000
Investment Company, Portfolio Turnover	45.47%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $2,969.1 Number of Holdings 56 Annual Portfolio Turnover 45.47% Total Advisory Fee $17.2
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 0.0 Mid Cap ($2.5-12 B) 3.5 Large Cap (>$12 B) 96.5 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 0.0% Mid Cap ($2.5-12 B) 3.5% Large Cap (>$12 B) 96.5% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg International Equity Fund - Class R5
Shareholder Report [Line Items]
Class Name	CLASS: R5
Trading Symbol	TIVRX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg International Equity Fund Class R5 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R5 $111.00 0.96%
Expenses Paid, Amount	$ 111
Expense Ratio, Percent	0.96%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R5 shares outperformed the MSCI All Country World ex USA Net Total Return USD Index (the “Index”) during the 12-month period ended September 30, 2024. During the period, non-U.S. equities have posted strong returns but lagged their U.S. counterparts, as U.S. mega-cap and artificial intelligence beneficiaries have continued to lead the market. Stock selection was a major contributor of the Fund’s outperformance relative to its benchmark, consistent with the Fund’s bottom-up investment approach. Sector allocation was modestly additive to performance while geographic allocation detracted from relative results. The Fund’s cash allocation was a drag on performance. Within industrials and information technology, stock selection bolstered relative returns. Additionally, stock selection in Japan and the U.S. also drove positive relative performance. An underweight positioning and weaker stock selection within financials and India hampered relative returns.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg International Equity Fund MSCI All Country World ex USA Net Total Return USD Index MSCI EAFE Net Total Return USD Index 09/30/2014 9999.994 10000 10000 10/31/2014 10016.4359 9900.9916 9854.8027 11/30/2014 10272.7458 9972.6147 9988.8459 12/31/2014 9827.1485 9613.0446 9642.8195 01/31/2015 10035.2444 9598.8003 9689.957 02/28/2015 10591.3627 10111.9989 10269.2311 03/31/2015 10566.2477 9948.5397 10113.2303 04/30/2015 11290.9954 10451.1052 10526.1436 05/31/2015 11409.3948 10287.947 10472.2625 06/30/2015 11094.3232 10000.9028 10175.5462 07/31/2015 11310.7978 9973.1163 10386.8244 08/31/2015 10567.5684 9210.8418 9622.7394 09/30/2015 10156.6425 8783.7614 9134.1379 10/31/2015 10721.9069 9437.6483 9848.1483 11/30/2015 10592.075 9242.8415 9694.9419 12/31/2015 10475.1373 9068.7492 9564.3111 01/31/2016 9733.2721 8451.8776 8872.6782 02/29/2016 9466.2006 8355.2767 8710.1239 03/31/2016 10025.779 9034.6429 9276.8694 04/30/2016 10267.4151 9272.3835 9545.445 05/31/2016 10208.0658 9115.896 9458.7334 06/30/2016 9732.5115 8976.4115 9141.226 07/31/2016 10126.9569 9420.3444 9604.511 08/31/2016 10255.5804 9479.93 9611.3298 09/30/2016 10379.2589 9596.794 9729.3984 10/31/2016 10206.3433 9458.8142 9530.3854 11/30/2016 10020.459 9240.0327 9340.5777 12/31/2016 10219.312 9476.419 9659.9725 01/31/2017 10413.842 9812.1147 9940.1874 02/28/2017 10413.842 9968.552 10082.3268 03/31/2017 10929.0169 10221.2893 10359.8799 04/30/2017 11275.1457 10440.0708 10623.4864 05/31/2017 11703.48 10778.8762 11013.4103 06/30/2017 11905.7932 10812.3304 10993.9322 07/31/2017 12270.7883 11210.8719 11311.0613 08/31/2017 12031.8034 11269.5045 11306.7993 09/30/2017 12368.5664 11478.7062 11588.1173 10/31/2017 12512.5391 11694.6789 11764.0795 11/30/2017 12623.1128 11789.6748 11887.4756 12/31/2017 12812.9582 12053.1957 12078.2834 01/31/2018 13619.4746 12724.4868 12684.1237 02/28/2018 12807.8857 12124.5179 12111.613 03/31/2018 12513.6848 11910.6517 11893.318 04/30/2018 12615.1334 12100.8441 12164.8742 05/31/2018 12356.4395 11821.4237 11891.4326 06/30/2018 11935.4278 11599.2316 11746.1521 07/31/2018 12280.353 11876.6458 12035.2871 08/31/2018 11904.9932 11628.0714 11802.8554 09/30/2018 11889.7759 11681.0364 11905.29 10/31/2018 10839.7829 10730.9268 10957.723 11/30/2018 11017.318 10832.4932 10943.915 12/31/2018 10269.6537 10342.216 10412.6559 01/31/2019 11188.2458 11123.6502 11096.9768 02/28/2019 11611.4175 11340.9771 11379.8535 03/31/2019 11879.7703 11408.5376 11451.6124 04/30/2019 12555.8128 11709.9264 11773.5779 05/31/2019 11750.7545 11081.4186 11208.1415 06/30/2019 12400.9939 11748.6972 11873.0695 07/31/2019 12297.7813 11606.5043 11722.319 08/31/2019 12086.1955 11248.0376 11418.6413 09/30/2019 12215.2112 11537.4893 11745.855 10/31/2019 12607.4191 11940.0432 12167.8726 11/30/2019 12799.7251 12045.3212 12305.043 12/31/2019 13250.6794 12566.946 12704.9525 01/31/2020 13085.5276 12229.3444 12439.5754 02/29/2020 12364.3648 11262.6833 11315.0659 03/31/2020 10668.8063 9631.9034 9804.8628 04/30/2020 11367.9489 10361.8271 10438.2833 05/31/2020 12111.132 10700.9334 10892.8165 06/30/2020 12645.1228 11184.5398 11263.7119 07/31/2020 13509.4172 11683.1931 11526.2569 08/31/2020 14434.2673 12183.301 12118.8319 09/30/2020 14125.984 11883.8181 11803.9447 10/31/2020 13927.8018 11628.3222 11332.6268 11/30/2020 15598.6568 13192.4946 13089.3349 12/31/2020 16254.2997 13905.5658 13697.936 01/31/2021 16373.566 13935.81 13552 02/28/2021 16827.9141 14211.6693 13855.9629 03/31/2021 16935.8217 14391.329 14174.5556 04/30/2021 17384.4903 14814.9987 14601.061 05/31/2021 18190.958 15278.3922 15077.2152 06/30/2021 17657.0992 15179.3838 14907.5391 07/31/2021 17214.1099 14929.2546 15019.785 08/31/2021 17452.6425 15213.0386 15284.7244 09/30/2021 16947.1804 14725.9212 14841.1473 10/31/2021 17543.5122 15077.4162 15206.1705 11/30/2021 16898.9175 14398.5013 14498.4184 12/31/2021 17484.642 14993.5549 15240.7933 01/31/2022 16902.252 14441.0338 14504.2965 02/28/2022 15886.305 14155.1934 14247.8395 03/31/2022 15595.11 14177.7637 14339.4171 04/30/2022 14585.634 13287.4905 13411.7322 05/31/2022 14818.59 13382.8375 13512.2774 06/30/2022 13737.933 12231.5513 12258.5056 07/31/2022 14203.845 12650.3057 12869.3466 08/31/2022 13550.274 12243.4383 12258.1214 09/30/2022 12269.016 11019.9271 11111.4106 10/31/2022 12579.624 11349.2529 11708.923 11/30/2022 14566.221 12688.9762 13027.7676 12/31/2022 14558.7617 12594.0806 13038.2364 01/31/2023 15865.4865 13615.6126 14094.035 02/28/2023 15146.1279 13137.6739 13799.9409 03/31/2023 15726.8945 13458.8242 14141.9588 04/30/2023 16030.477 13692.6526 14541.2266 05/31/2023 15495.9078 13194.8018 13925.87 06/30/2023 16155.8698 13786.846 14559.6312 07/31/2023 16749.8356 14347.342 15030.7292 08/31/2023 16169.069 13699.3735 14454.8655 09/30/2023 15462.9097 13266.6757 13961.1207 10/31/2023 15126.329 12719.3207 13395.1119 11/30/2023 16300.7472 13864.2371 14638.4169 12/31/2023 16887.1175 14560.8069 15416.1415 01/31/2024 16920.9052 14416.1563 15504.8593 02/29/2024 17454.7517 14781.1433 15788.6688 03/31/2024 18191.3246 15243.1825 16307.952 04/30/2024 17981.8405 14969.4799 15890.3251 05/31/2024 18954.9277 15404.0336 16505.8361 06/30/2024 18765.7164 15389.3378 16239.3678 07/31/2024 19400.926 15745.6978 16715.7754 08/31/2024 19873.9546 16194.1448 17259.3077 09/30/2024 20455.1039 16630.2031 17418.6872
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year International Equity Fund Class R5 32.29% 10.86% 7.42% MSCI All Country World ex USA Net Total Return USD Index 25.35% 7.59% 5.22% MSCI EAFE Net Total Return USD Index 24.77% 8.20% 5.71%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fiv/TIVRX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 2,969,100,000
Holdings Count | Holdings	56
Advisory Fees Paid, Amount	$ 17,200,000
Investment Company, Portfolio Turnover	45.47%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $2,969.1 Number of Holdings 56 Annual Portfolio Turnover 45.47% Total Advisory Fee $17.2
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 0.0 Mid Cap ($2.5-12 B) 3.5 Large Cap (>$12 B) 96.5 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 0.0% Mid Cap ($2.5-12 B) 3.5% Large Cap (>$12 B) 96.5% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg International Equity Fund - Class R6
Shareholder Report [Line Items]
Class Name	CLASS: R6
Trading Symbol	TGIRX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg International Equity Fund Class R6 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R6 $89.00 0.76%
Expenses Paid, Amount	$ 89
Expense Ratio, Percent	0.76%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R6 shares outperformed the MSCI All Country World ex USA Net Total Return USD Index (the “Index”) during the 12-month period ended September 30, 2024. During the period, non-U.S. equities have posted strong returns but lagged their U.S. counterparts, as U.S. mega-cap and artificial intelligence beneficiaries have continued to lead the market. Stock selection was a major contributor of the Fund’s outperformance relative to its benchmark, consistent with the Fund’s bottom-up investment approach. Sector allocation was modestly additive to performance while geographic allocation detracted from relative results. The Fund’s cash allocation was a drag on performance. Within industrials and information technology, stock selection bolstered relative returns. Additionally, stock selection in Japan and the U.S. also drove positive relative performance. An underweight positioning and weaker stock selection within financials and India hampered relative returns.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg International Equity Fund MSCI All Country World ex USA Net Total Return USD Index MSCI EAFE Net Total Return USD Index 09/30/2014 10000.0072 10000 10000 10/31/2014 10019.77 9900.9916 9854.8027 11/30/2014 10276.2325 9972.6147 9988.8459 12/31/2014 9833.7606 9613.0446 9642.8195 01/31/2015 10045.9741 9598.8003 9689.957 02/28/2015 10603.4843 10111.9989 10269.2311 03/31/2015 10578.3064 9948.5397 10113.2303 04/30/2015 11308.465 10451.1052 10526.1436 05/31/2015 11427.1607 10287.947 10472.2625 06/30/2015 11115.2735 10000.9028 10175.5462 07/31/2015 11332.5809 9973.1163 10386.8244 08/31/2015 10590.114 9210.8418 9622.7394 09/30/2015 10181.2198 8783.7614 9134.1379 10/31/2015 10749.0676 9437.6483 9848.1483 11/30/2015 10622.8617 9242.8415 9694.9419 12/31/2015 10507.7034 9068.7492 9564.3111 01/31/2016 9761.7204 8451.8776 8872.6782 02/29/2016 9497.4293 8355.2767 8710.1239 03/31/2016 10064.3764 9034.6429 9276.8694 04/30/2016 10307.3537 9272.3835 9545.445 05/31/2016 10247.675 9115.896 9458.7334 06/30/2016 9771.6504 8976.4115 9141.226 07/31/2016 10173.0477 9420.3444 9604.511 08/31/2016 10298.2146 9479.93 9611.3298 09/30/2016 10425.6984 9596.794 9729.3984 10/31/2016 10251.5741 9458.8142 9530.3854 11/30/2016 10068.7434 9240.0327 9340.5777 12/31/2016 10273.3396 9476.419 9659.9725 01/31/2017 10469.2295 9812.1147 9940.1874 02/28/2017 10473.5827 9968.552 10082.3268 03/31/2017 10992.0888 10221.2893 10359.8799 04/30/2017 11341.044 10440.0708 10623.4864 05/31/2017 11772.8761 10778.8762 11013.4103 06/30/2017 11975.2576 10812.3304 10993.9322 07/31/2017 12343.4573 11210.8719 11311.0613 08/31/2017 12111.1408 11269.5045 11306.7993 09/30/2017 12448.7228 11478.7062 11588.1173 10/31/2017 12594.0386 11694.6789 11764.0795 11/30/2017 12710.0738 11789.6748 11887.4756 12/31/2017 12903.1385 12053.1957 12078.2834 01/31/2018 13717.9117 12724.4868 12684.1237 02/28/2018 12903.1385 12124.5179 12111.613 03/31/2018 12611.05 11910.6517 11893.318 04/30/2018 12713.5372 12100.8441 12164.8742 05/31/2018 12452.1948 11821.4237 11891.4326 06/30/2018 12031.9973 11599.2316 11746.1521 07/31/2018 12380.4538 11876.6458 12035.2871 08/31/2018 12006.3755 11628.0714 11802.8554 09/30/2018 11991.0024 11681.0364 11905.29 10/31/2018 10935.3842 10730.9268 10957.723 11/30/2018 11114.7368 10832.4932 10943.915 12/31/2018 10363.0059 10342.216 10412.6559 01/31/2019 11288.461 11123.6502 11096.9768 02/28/2019 11722.4315 11340.9771 11379.8535 03/31/2019 11994.3166 11408.5376 11451.6124 04/30/2019 12679.258 11709.9264 11773.5779 05/31/2019 11868.8312 11081.4186 11208.1415 06/30/2019 12527.6298 11748.6972 11873.0695 07/31/2019 12423.0586 11606.5043 11722.319 08/31/2019 12213.9162 11248.0376 11418.6413 09/30/2019 12344.6302 11537.4893 11745.855 10/31/2019 12742.0007 11940.0432 12167.8726 11/30/2019 12936.8293 12045.3212 12305.043 12/31/2019 13395.7724 12566.946 12704.9525 01/31/2020 13228.0457 12229.3444 12439.5754 02/29/2020 12501.23 11262.6833 11315.0659 03/31/2020 10790.4177 9631.9034 9804.8628 04/30/2020 11506.0516 10361.8271 10438.2833 05/31/2020 12260.8218 10700.9334 10892.8165 06/30/2020 12797.5472 11184.5398 11263.7119 07/31/2020 13680.9078 11683.1931 11526.2569 08/31/2020 14614.5865 12183.301 12118.8319 09/30/2020 14307.0875 11883.8181 11803.9447 10/31/2020 14111.4064 11628.3222 11332.6268 11/30/2020 15802.7365 13192.4946 13089.3349 12/31/2020 16469.4707 13905.5658 13697.936 01/31/2021 16596.6481 13935.81 13552 02/28/2021 17059.1113 14211.6693 13855.9629 03/31/2021 17168.9463 14391.329 14174.5556 04/30/2021 17625.6287 14814.9987 14601.061 05/31/2021 18452.2817 15278.3922 15077.2152 06/30/2021 17908.8874 15179.3838 14907.5391 07/31/2021 17463.7666 14929.2546 15019.785 08/31/2021 17706.5598 15213.0386 15284.7244 09/30/2021 17197.8502 14725.9212 14841.1473 10/31/2021 17804.8332 15077.4162 15206.1705 11/30/2021 17154.8759 14398.5013 14498.4184 12/31/2021 17749.2403 14993.5549 15240.7933 01/31/2022 17161.5609 14441.0338 14504.2965 02/28/2022 16131.471 14155.1934 14247.8395 03/31/2022 15840.9329 14177.7637 14339.4171 04/30/2022 14824.0493 13287.4905 13411.7322 05/31/2022 15061.7623 13382.8375 13512.2774 06/30/2022 13959.038 12231.5513 12258.5056 07/31/2022 14434.464 12650.3057 12869.3466 08/31/2022 13774.15 12243.4383 12258.1214 09/30/2022 12473.3315 11019.9271 11111.4106 10/31/2022 12796.8853 11349.2529 11708.923 11/30/2022 14817.4462 12688.9762 13027.7676 12/31/2022 14808.2055 12594.0806 13038.2364 01/31/2023 16144.5887 13615.6126 14094.035 02/28/2023 15415.6524 13137.6739 13799.9409 03/31/2023 16009.6005 13458.8242 14141.9588 04/30/2023 16320.0734 13692.6526 14541.2266 05/31/2023 15780.1206 13194.8018 13925.87 06/30/2023 16455.0616 13786.846 14559.6312 07/31/2023 17055.7591 14347.342 15030.7292 08/31/2023 16475.3098 13699.3735 14454.8655 09/30/2023 15753.1229 13266.6757 13961.1207 10/31/2023 15415.6524 12719.3207 13395.1119 11/30/2023 16616.7381 13864.2371 14638.4169 12/31/2023 17215.6992 14560.8069 15416.1415 01/31/2024 17257.2495 14416.1563 15504.8593 02/29/2024 17797.4042 14781.1433 15788.6688 03/31/2024 18552.2357 15243.1825 16307.952 04/30/2024 18344.4839 14969.4799 15890.3251 05/31/2024 19341.6926 15404.0336 16505.8361 06/30/2024 19154.716 15389.3378 16239.3678 07/31/2024 19805.6716 15745.6978 16715.7754 08/31/2024 20290.4258 16194.1448 17259.3077 09/30/2024 20885.981 16630.2031 17418.6872
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year International Equity Fund Class R6 32.58% 11.09% 7.64% MSCI All Country World ex USA Net Total Return USD Index 25.35% 7.59% 5.22% MSCI EAFE Net Total Return USD Index 24.77% 8.20% 5.71%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fiv/TGIRX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 2,969,100,000
Holdings Count | Holdings	56
Advisory Fees Paid, Amount	$ 17,200,000
Investment Company, Portfolio Turnover	45.47%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $2,969.1 Number of Holdings 56 Annual Portfolio Turnover 45.47% Total Advisory Fee $17.2
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 0.0 Mid Cap ($2.5-12 B) 3.5 Large Cap (>$12 B) 96.5 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 0.0% Mid Cap ($2.5-12 B) 3.5% Large Cap (>$12 B) 96.5% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Better World International Fund - Class A
Shareholder Report [Line Items]
Class Name	CLASS: A
Trading Symbol	TBWAX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Better World International Fund Class A Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $159.00 1.44%
Expenses Paid, Amount	$ 159
Expense Ratio, Percent	1.44%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class A shares underperformed the MSCI All Country World ex USA Net Total Return USD Index (the “Index”) during the 12-month period ended September 30, 2024. During the period, non-U.S. equities posted strong returns but lagged their U.S. counterparts, as U.S. mega-cap and artificial intelligence beneficiaries have continued to lead the market. Stock selection contributed positively to Fund performance relative to the Index over the period, aligning with the Fund’s focus on bottom-up security selection. Detractors from relative performance included sector and region/country allocations. Currency effects on the Fund’s performance were negative during the period. Within industrials, stock selection and a zero-weight positioning to energy contributed positively to relative results. However, stock selection in financials and consumer discretionary detracted from relative returns. From a geographic perspective, stock selection in Japan, the U.S., and Germany bolstered relative returns. The Fund’s stock selection in China, as well as an underweight positioning in Taiwan, were the largest detractors.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Better World International Fund MSCI All Country World ex USA Net Total Return USD Index 09/30/2015 9552 10000 10/31/2015 9920 10744.4269 11/30/2015 10000 10522.6463 12/31/2015 9944 10324.4484 01/31/2016 9480 9622.1621 02/29/2016 9440 9512.1854 03/31/2016 9968 10285.6197 04/30/2016 10072 10556.2788 05/31/2016 9984 10378.1234 06/30/2016 9872 10219.3253 07/31/2016 10416 10724.7271 08/31/2016 10584 10792.5632 09/30/2016 11138.0069 10925.6087 10/31/2016 10993.3574 10768.5236 11/30/2016 10573.3442 10519.4486 12/31/2016 10615.7733 10788.5661 01/31/2017 10768.5183 11170.7437 02/28/2017 10700.6316 11348.842 03/31/2017 11155.1824 11636.5744 04/30/2017 11274.1256 11885.6494 05/31/2017 11673.4353 12271.3672 06/30/2017 11746.8206 12309.4537 07/31/2017 12063.147 12763.1789 08/31/2017 12097.3444 12829.9301 09/30/2017 12096.4528 13068.0988 10/31/2017 12404.6427 13313.9761 11/30/2017 12613.7235 13422.1255 12/31/2017 12938.7289 13722.1347 01/31/2018 13448.1968 14486.3757 02/28/2018 12798.186 13803.3324 03/31/2018 12719.1306 13559.8534 04/30/2018 12894.8092 13776.3807 05/31/2018 12763.0503 13458.2705 06/30/2018 12736.6985 13205.3127 07/31/2018 12965.0807 13521.1388 08/31/2018 12657.6431 13238.1458 09/30/2018 12745.4824 13298.4446 10/31/2018 11550.8679 12216.7786 11/30/2018 11683.2545 12332.4083 12/31/2018 11090.4601 11774.2451 01/31/2019 11676.1901 12663.8801 02/28/2019 12050.6731 12911.2992 03/31/2019 12194.7051 12988.2143 04/30/2019 12751.6286 13331.3348 05/31/2019 11916.2433 12615.801 06/30/2019 12694.0159 13375.4739 07/31/2019 12444.3605 13213.5923 08/31/2019 12156.2966 12805.4908 09/30/2019 12338.7371 13135.0212 10/31/2019 12847.6499 13593.3146 11/30/2019 13193.3266 13713.1698 12/31/2019 13722.3688 14307.0212 01/31/2020 13432.4596 13922.6737 02/29/2020 12611.0502 12822.1644 03/31/2020 11035.8769 10965.5795 04/30/2020 12021.5682 11796.5717 05/31/2020 12804.323 12182.6321 06/30/2020 13558.0869 12733.2009 07/31/2020 14408.4872 13300.8999 08/31/2020 15316.8694 13870.2549 09/30/2020 15133.2602 13529.3043 10/31/2020 14833.6874 13238.4313 11/30/2020 16495.8335 15019.186 12/31/2020 17268.9247 15830.9922 01/31/2021 17162.6246 15865.4241 02/28/2021 18341.5887 16179.4802 03/31/2021 18824.7707 16384.0163 04/30/2021 19491.5619 16866.3492 05/31/2021 19858.7802 17393.9062 06/30/2021 21308.3262 17281.1886 07/31/2021 20912.117 16996.4255 08/31/2021 21598.2354 17319.5034 09/30/2021 20738.1714 16764.9376 10/31/2021 21337.3171 17165.1021 11/30/2021 20512.3745 16392.1817 12/31/2021 20789.5688 17069.6291 01/31/2022 20201.9169 16440.6034 02/28/2022 19281.632 16115.1843 03/31/2022 19148.5788 16140.8798 04/30/2022 17563.0277 15127.3354 05/31/2022 17563.0277 15235.8846 06/30/2022 16454.2507 13925.1861 07/31/2022 17174.9557 14401.9232 08/31/2022 16365.5485 13938.7191 09/30/2022 14946.314 12545.7951 10/31/2022 15267.8593 12920.7208 11/30/2022 17186.0435 14445.9481 12/31/2022 16947.1391 14337.9128 01/31/2023 18492.8427 15500.8908 02/28/2023 17647.7098 14956.7745 03/31/2023 18237.0788 15322.3928 04/30/2023 18570.6839 15588.5981 05/31/2023 18214.8385 15021.8126 06/30/2023 18937.6495 15695.8339 07/31/2023 19471.4177 16333.9386 08/31/2023 18748.6066 15596.2496 09/30/2023 17903.4737 15103.6385 10/31/2023 17269.624 14480.4943 11/30/2023 18337.1603 15783.9409 12/31/2023 19003.6778 16576.9609 01/31/2024 18823.8677 16412.2813 02/29/2024 19509.3937 16827.8059 03/31/2024 19880.252 17353.8212 04/30/2024 19408.2505 17042.2205 05/31/2024 20239.8721 17536.9444 06/30/2024 20206.1577 17520.2138 07/31/2024 20959.1125 17925.917 08/31/2024 21577.2096 18436.4579 09/30/2024 21712.0672 18932.8948
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year Better World International Fund Class A (with sales charge) 15.81% 10.93% Better World International Fund Class A (without sales charge) 21.27% 11.97% MSCI All Country World ex USA Net Total Return USD Index 25.35% 7.59%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment and assumes the deduction of the maximum sales charge associated with that investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fbwi/TBWAX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 570,100,000
Holdings Count | Holdings	57
Advisory Fees Paid, Amount	$ 4,700,000
Investment Company, Portfolio Turnover	60.57%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $570.1 Number of Holdings 57 Annual Portfolio Turnover 60.57% Total Advisory Fee $4.7
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 0.9 Mid Cap ($2.5-12 B) 14.4 Large Cap (>$12 B) 84.7 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 0.9% Mid Cap ($2.5-12 B) 14.4% Large Cap (>$12 B) 84.7% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Better World International Fund - Class C
Shareholder Report [Line Items]
Class Name	CLASS: C
Trading Symbol	TBWCX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Better World International Fund Class C Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $241.00 2.19%
Expenses Paid, Amount	$ 241
Expense Ratio, Percent	2.19%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class C shares underperformed the MSCI All Country World ex USA Net Total Return USD Index (the “Index”) during the 12-month period ended September 30, 2024. During the period, non-U.S. equities posted strong returns but lagged their U.S. counterparts, as U.S. mega-cap and artificial intelligence beneficiaries have continued to lead the market. Stock selection contributed positively to Fund performance relative to the Index over the period, aligning with the Fund’s focus on bottom-up security selection. Detractors from relative performance included sector and region/country allocations. Currency effects on the Fund’s performance were negative during the period. Within industrials, stock selection and a zero-weight positioning to energy contributed positively to relative results. However, stock selection in financials and consumer discretionary detracted from relative returns. From a geographic perspective, stock selection in Japan, the U.S., and Germany bolstered relative returns. The Fund’s stock selection in China, as well as an underweight positioning in Taiwan, were the largest detractors.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Better World International Fund MSCI All Country World ex USA Net Total Return USD Index 09/30/2015 10000.0007 10000 10/31/2015 10385.2604 10744.4269 11/30/2015 10460.6373 10522.6463 12/31/2015 10393.6356 10324.4484 01/31/2016 9899.4982 9622.1621 02/29/2016 9865.9974 9512.1854 03/31/2016 10402.0108 10285.6197 04/30/2016 10502.5133 10556.2788 05/31/2016 10410.386 10378.1234 06/30/2016 10284.7579 10219.3253 07/31/2016 10845.897 10724.7271 08/31/2016 11021.7764 10792.5632 09/30/2016 11594.0942 10925.6087 10/31/2016 11425.942 10768.5236 11/30/2016 10994.938 10519.4486 12/31/2016 11030.4628 10788.5661 01/31/2017 11190.3246 11170.7437 02/28/2017 11110.3937 11348.842 03/31/2017 11581.0978 11636.5744 04/30/2017 11705.4348 11885.6494 05/31/2017 12105.0892 12271.3672 06/30/2017 12177.7784 12309.4537 07/31/2017 12499.186 12763.1789 08/31/2017 12525.97 12829.9301 09/30/2017 12518.0094 13068.0988 10/31/2017 12839.4418 13313.9761 11/30/2017 13048.5962 13422.1255 12/31/2017 13369.3131 13722.1347 01/31/2018 13900.7868 14486.3757 02/28/2018 13222.6996 13803.3324 03/31/2018 13131.0662 13559.8534 04/30/2018 13314.333 13776.3807 05/31/2018 13167.7196 13458.2705 06/30/2018 13131.0662 13205.3127 07/31/2018 13360.1497 13521.1388 08/31/2018 13039.4328 13238.1458 09/30/2018 13121.9029 13298.4446 10/31/2018 11884.852 12216.7786 11/30/2018 12023.7736 12332.4083 12/31/2018 11408.8117 11774.2451 01/31/2019 11994.6427 12663.8801 02/28/2019 12381.887 12911.2992 03/31/2019 12520.8977 12988.2143 04/30/2019 13076.9408 13331.3348 05/31/2019 12223.0175 12615.801 06/30/2019 13007.4354 13375.4739 07/31/2019 12759.2019 13213.5923 08/31/2019 12451.3924 12805.4908 09/30/2019 12630.1205 13135.0212 10/31/2019 13146.4462 13593.3146 11/30/2019 13493.9731 13713.1698 12/31/2019 14019.9218 14307.0212 01/31/2020 13721.837 13922.6737 02/29/2020 12887.1995 12822.1644 03/31/2020 11267.6054 10965.5795 04/30/2020 12271.1576 11796.5717 05/31/2020 13056.1142 12182.6321 06/30/2020 13821.1986 12733.2009 07/31/2020 14685.6445 13300.8999 08/31/2020 15599.7712 13870.2549 09/30/2020 15410.9842 13529.3043 10/31/2020 15093.027 13238.4313 11/30/2020 16782.1742 15019.186 12/31/2020 17557.1947 15830.9922 01/31/2021 17428.0246 15865.4241 02/28/2021 18620.3638 16179.4802 03/31/2021 19097.2995 16384.0163 04/30/2021 19763.0222 16866.3492 05/31/2021 20120.724 17393.9062 06/30/2021 21571.4034 17281.1886 07/31/2021 21154.0846 16996.4255 08/31/2021 21839.6797 17319.5034 09/30/2021 20945.4253 16764.9376 10/31/2021 21541.5949 17165.1021 11/30/2021 20693.368 16392.1817 12/31/2021 20956.3224 17069.6291 01/31/2022 20361.8168 16440.6034 02/28/2022 19412.8944 16115.1843 03/31/2022 19275.7008 16140.8798 04/30/2022 17663.676 15127.3354 05/31/2022 17652.2432 15235.8846 06/30/2022 16531.8288 13925.1861 07/31/2022 17252.0952 14401.9232 08/31/2022 16417.5008 13938.7191 09/30/2022 14988.4008 12545.7951 10/31/2022 15297.0864 12920.7208 11/30/2022 17274.9608 14445.9481 12/31/2022 16966.2752 14337.9128 01/31/2023 18509.7032 15500.8908 02/28/2023 17640.8104 14956.7745 03/31/2023 18223.8832 15322.3928 04/30/2023 18544.0016 15588.5981 05/31/2023 18189.5848 15021.8126 06/30/2023 18898.4184 15695.8339 07/31/2023 19412.8944 16333.9386 08/31/2023 18681.1952 15596.2496 09/30/2023 17823.7352 15103.6385 10/31/2023 17183.4984 14480.4943 11/30/2023 18235.316 15783.9409 12/31/2023 18880.7836 16576.9609 01/31/2024 18697.1407 16412.2813 02/29/2024 19362.8462 16827.8059 03/31/2024 19718.6542 17353.8212 04/30/2024 19236.5917 17042.2205 05/31/2024 20040.0293 17536.9444 06/30/2024 20005.5962 17520.2138 07/31/2024 20740.1678 17925.917 08/31/2024 21337.0071 18436.4579 09/30/2024 21463.2616 18932.8948
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year Better World International Fund Class C (with sales charge) 19.42% 11.19% Better World International Fund Class C (without sales charge) 20.42% 11.19% MSCI All Country World ex USA Net Total Return USD Index 25.35% 7.59%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fbwi/TBWCX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 570,100,000
Holdings Count | Holdings	57
Advisory Fees Paid, Amount	$ 4,700,000
Investment Company, Portfolio Turnover	60.57%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $570.1 Number of Holdings 57 Annual Portfolio Turnover 60.57% Total Advisory Fee $4.7
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 0.9 Mid Cap ($2.5-12 B) 14.4 Large Cap (>$12 B) 84.7 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 0.9% Mid Cap ($2.5-12 B) 14.4% Large Cap (>$12 B) 84.7% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Better World International Fund - Class I
Shareholder Report [Line Items]
Class Name	CLASS: I
Trading Symbol	TBWIX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Better World International Fund Class I Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $100.00 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 Fund’s Class I shares underperformed the MSCI All Country World ex USA Net Total Return USD Index (the “Index”) during the 12-month period ended September 30, 2024. During the period, non-U.S. equities posted strong returns but lagged their U.S. counterparts, as U.S. mega-cap and artificial intelligence beneficiaries have continued to lead the market. Stock selection contributed positively to Fund performance relative to the Index over the period, aligning with the Fund’s focus on bottom-up security selection. Detractors from relative performance included sector and region/country allocations. Currency effects on the Fund’s performance were negative during the period. Within industrials, stock selection and a zero-weight positioning to energy contributed positively to relative results. However, stock selection in financials and consumer discretionary detracted from relative returns. From a geographic perspective, stock selection in Japan, the U.S., and Germany bolstered relative returns. The Fund’s stock selection in China, as well as an underweight positioning in Taiwan, were the largest detractors.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Better World International Fund MSCI All Country World ex USA Net Total Return USD Index 09/30/2015 10000.0007 10000 10/31/2015 10393.6356 10744.4269 11/30/2015 10485.7629 10522.6463 12/31/2015 10427.1365 10324.4484 01/31/2016 9941.3743 9622.1621 02/29/2016 9916.2486 9512.1854 03/31/2016 10477.3877 10285.6197 04/30/2016 10594.6406 10556.2788 05/31/2016 10510.8885 10378.1234 06/30/2016 10393.6356 10219.3253 07/31/2016 10971.5251 10724.7271 08/31/2016 11155.7797 10792.5632 09/30/2016 11744.1432 10925.6087 10/31/2016 11592.7144 10768.5236 11/30/2016 11161.4184 10519.4486 12/31/2016 11214.6948 10788.5661 01/31/2017 11383.4036 11170.7437 02/28/2017 11321.2477 11348.842 03/31/2017 11816.9026 11636.5744 04/30/2017 11959.2749 11885.6494 05/31/2017 12377.4936 12271.3672 06/30/2017 12472.3061 12309.4537 07/31/2017 12812.7857 12763.1789 08/31/2017 12857.5856 12829.9301 09/30/2017 12868.8989 13068.0988 10/31/2017 13201.1733 13313.9761 11/30/2017 13429.6672 13422.1255 12/31/2017 13779.6859 13722.1347 01/31/2018 14341.5581 14486.3757 02/28/2018 13650.7316 13803.3324 03/31/2018 13586.2545 13559.8534 04/30/2018 13779.6859 13776.3807 05/31/2018 13650.7316 13458.2705 06/30/2018 13623.0986 13205.3127 07/31/2018 13881.0071 13521.1388 08/31/2018 13549.4104 13238.1458 09/30/2018 13659.9427 13298.4446 10/31/2018 12379.6109 12216.7786 11/30/2018 12537.4517 12332.4083 12/31/2018 11906.7674 11774.2451 01/31/2019 12544.088 12663.8801 02/28/2019 12948.736 12911.2992 03/31/2019 13110.5952 12988.2143 04/30/2019 13717.5672 13331.3348 05/31/2019 12827.3416 12615.801 06/30/2019 13677.1024 13375.4739 07/31/2019 13424.1974 13213.5923 08/31/2019 13110.5952 12805.4908 09/30/2019 13312.9192 13135.0212 10/31/2019 13869.3102 13593.3146 11/30/2019 14253.7258 13713.1698 12/31/2019 14838.5538 14307.0212 01/31/2020 14520.8775 13922.6737 02/29/2020 13649.8298 12822.1644 03/31/2020 11948.7249 10965.5795 04/30/2020 13034.9726 11796.5717 05/31/2020 13885.5251 12182.6321 06/30/2020 14715.5823 12733.2009 07/31/2020 15648.1157 13300.8999 08/31/2020 16642.1349 13870.2549 09/30/2020 16457.6777 13529.3043 10/31/2020 16140.0015 13238.4313 11/30/2020 17964.0779 15019.186 12/31/2020 18807.6705 15830.9922 01/31/2021 18694.4952 15865.4241 02/28/2021 19990.8664 16179.4802 03/31/2021 20525.8767 16384.0163 04/30/2021 21266.6602 16866.3492 05/31/2021 21678.2066 17393.9062 06/30/2021 23262.6603 17281.1886 07/31/2021 22830.5365 16996.4255 08/31/2021 23591.8974 17319.5034 09/30/2021 22665.918 16764.9376 10/31/2021 23324.3922 17165.1021 11/30/2021 22437.0878 16392.1817 12/31/2021 22742.5435 17069.6291 01/31/2022 22117.6836 16440.6034 02/28/2022 21115.5497 16115.1843 03/31/2022 20985.8618 16140.8798 04/30/2022 19252.7597 15127.3354 05/31/2022 19264.5495 15235.8846 06/30/2022 18050.1991 13925.1861 07/31/2022 18851.9062 14401.9232 08/31/2022 17967.6704 13938.7191 09/30/2022 16423.2053 12545.7951 10/31/2022 16776.8996 12920.7208 11/30/2022 18899.0654 14445.9481 12/31/2022 18647.1891 14337.9128 01/31/2023 20359.6861 15500.8908 02/28/2023 19432.0836 14956.7745 03/31/2023 20098.0546 15322.3928 04/30/2023 20466.7171 15588.5981 05/31/2023 20086.1623 15021.8126 06/30/2023 20894.8414 15695.8339 07/31/2023 21489.4584 16333.9386 08/31/2023 20704.5639 15596.2496 09/30/2023 19788.8538 15103.6385 10/31/2023 19087.2057 14480.4943 11/30/2023 20276.4397 15783.9409 12/31/2023 21018.3126 16576.9609 01/31/2024 20837.1202 16412.2813 02/29/2024 21598.1281 16827.8059 03/31/2024 22020.9103 17353.8212 04/30/2024 21501.4922 17042.2205 05/31/2024 22431.6129 17536.9444 06/30/2024 22407.454 17520.2138 07/31/2024 23265.0977 17925.917 08/31/2024 23965.7082 18436.4579 09/30/2024 24122.7415 18932.8948
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year Better World International Fund Class I 21.90% 12.62% MSCI All Country World ex USA Net Total Return USD Index 25.35% 7.59%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fbwi/TBWIX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 570,100,000
Holdings Count | Holdings	57
Advisory Fees Paid, Amount	$ 4,700,000
Investment Company, Portfolio Turnover	60.57%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $570.1 Number of Holdings 57 Annual Portfolio Turnover 60.57% Total Advisory Fee $4.7
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 0.9 Mid Cap ($2.5-12 B) 14.4 Large Cap (>$12 B) 84.7 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 0.9% Mid Cap ($2.5-12 B) 14.4% Large Cap (>$12 B) 84.7% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg International Growth Fund - Class A
Shareholder Report [Line Items]
Class Name	CLASS: A
Trading Symbol	TIGAX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg International Growth Fund Class A Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $154.00 1.37%
Expenses Paid, Amount	$ 154
Expense Ratio, Percent	1.37%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class A shares underperformed the MSCI All Country World ex USA Growth Net Total Return USD Index (the “Index”) during the 12-month period ended September 30, 2024. During the period, non-U.S. equities have posted strong returns but lagged their U.S. counterparts, as U.S. mega-cap and artificial intelligence beneficiaries have continued to lead the market. The Fund’s underperformance relative to the Index was primarily driven by portfolio allocations across sectors and countries. However, strong stock selection added to relative results, consistent with the Fund’s bottom-up investment process. The Fund’s cash allocation was a drag on performance. Within information technology and consumer services, both stock selection and general positioning versus the Index bolstered relative returns. Security selection within South Korea and Brazil also contributed to relative returns. The Fund’s overweight exposure to consumer staples and the UK were detractors from relative performance as both underperformed other sectors and countries, respectively.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg International Growth Fund MSCI All Country World ex USA Growth Net Total Return USD Index MSCI All Country World ex USA Net Total Return USD Index 09/30/2014 9550 10000 10000 10/31/2014 9780 9965.2434 9900.9916 11/30/2014 9800.0074 10111.108 9972.6147 12/31/2014 9489.314 9769.5894 9613.0446 01/31/2015 9310.2703 9843.0021 9598.8003 02/28/2015 10115.9668 10348.0743 10111.9989 03/31/2015 9942.1891 10237.4749 9948.5397 04/30/2015 10431.9262 10688.4625 10451.1052 05/31/2015 10421.3942 10573.2855 10287.947 06/30/2015 10068.5729 10297.4371 10000.9028 07/31/2015 10194.9566 10324.4511 9973.1163 08/31/2015 9731.5495 9548.6733 9210.8418 09/30/2015 9357.6642 9188.0528 8783.7614 10/31/2015 10026.445 9884.1448 9437.6483 11/30/2015 10194.9566 9773.3194 9242.8415 12/31/2015 10089.6368 9647.1785 9068.7492 01/31/2016 9373.4622 9052.0218 8451.8776 02/29/2016 9204.9505 8938.3707 8355.2767 03/31/2016 9752.6135 9614.8521 9034.6429 04/30/2016 9620.9637 9760.6601 9272.3835 05/31/2016 9794.7414 9697.5896 9115.896 06/30/2016 9241.8124 9659.3857 8976.4115 07/31/2016 9852.6673 10124.0498 9420.3444 08/31/2016 10100.1688 10088.1065 9479.93 09/30/2016 10127.9213 10245.1609 9596.794 10/31/2016 9790.6753 9896.9171 9458.8142 11/30/2016 9543.0102 9519.9073 9240.0327 12/31/2016 9579.8965 9659.2161 9476.419 01/31/2017 9954.0288 10048.094 9812.1147 02/28/2017 10017.2625 10250.3038 9968.552 03/31/2017 10607.4431 10540.733 10221.2893 04/30/2017 11160.7375 10847.2124 10440.0708 05/31/2017 11645.5287 11329.4527 10778.8762 06/30/2017 11666.6066 11338.0994 10812.3304 07/31/2017 12272.5956 11730.9333 11210.8719 08/31/2017 12183.0146 11848.5405 11269.5045 09/30/2017 12571.168 12056.2887 11478.7062 10/31/2017 12560.6262 12346.2093 11694.6789 11/30/2017 12562.6316 12482.0707 11789.6748 12/31/2017 12868.3715 12751.4199 12053.1957 01/31/2018 13791.0506 13415.7507 12724.4868 02/28/2018 13305.1427 12815.5642 12124.5179 03/31/2018 13108.5956 12640.3685 11910.6517 04/30/2018 13174.1113 12735.1437 12100.8441 05/31/2018 13397.9566 12662.8048 11821.4237 06/30/2018 13370.6584 12460.4821 11599.2316 07/31/2018 13539.9072 12674.4469 11876.6458 08/31/2018 13316.062 12531.6341 11628.0714 09/30/2018 12983.0239 12428.0991 11681.0364 10/31/2018 11792.8224 11264.5737 10730.9268 11/30/2018 11570.9372 11435.2482 10832.4932 12/31/2018 10679.2036 10911.9218 10342.216 01/31/2019 11579.9958 11741.9537 11123.6502 02/28/2019 11868.9292 12059.2274 11340.9771 03/31/2019 12276.8351 12255.4466 11408.5376 04/30/2019 12922.6862 12641.2727 11709.9264 05/31/2019 11919.9174 11992.9922 11081.4186 06/30/2019 12458.1266 12789.0587 11748.6972 07/31/2019 12480.7881 12762.3273 11606.5043 08/31/2019 12248.5083 12531.5211 11248.0376 09/30/2019 12157.8626 12680.5505 11537.4893 10/31/2019 12560.1031 13141.5977 11940.0432 11/30/2019 12868.7112 13342.0554 12045.3212 12/31/2019 13444.8325 13895.2782 12566.946 01/31/2020 13478.9999 13761.7904 12229.3444 02/29/2020 12846.9048 12757.4105 11262.6833 03/31/2020 11463.1292 11360.0271 9631.9034 04/30/2020 12522.3154 12340.2187 10361.8271 05/31/2020 13701.0873 12877.1087 10700.9334 06/30/2020 14435.6843 13530.5886 11184.5398 07/31/2020 15608.7616 14447.8793 11683.1931 08/31/2020 16320.5803 15037.215 12183.301 09/30/2020 16155.4383 14905.253 11883.8181 10/31/2020 15904.8781 14643.7028 11628.3222 11/30/2020 17136.7577 16132.5836 13192.4946 12/31/2020 18007.7272 16980.1916 13905.5658 01/31/2021 17932.7431 17083.2179 13935.81 02/28/2021 17955.8151 17021.1648 14211.6693 03/31/2021 17407.8542 16967.4193 14391.329 04/30/2021 18296.1277 17593.433 14814.9987 05/31/2021 18013.4952 18018.1412 15278.3922 06/30/2021 18290.3597 18087.4848 15179.3838 07/31/2021 18192.3035 17812.7102 14929.2546 08/31/2021 18665.2804 18215.1516 15213.0386 09/30/2021 17459.7663 17432.253 14725.9212 10/31/2021 18036.5673 17972.3643 15077.4162 11/30/2021 16834.1595 17323.236 14398.5013 12/31/2021 17203.7349 17845.2061 14993.5549 01/31/2022 15805.5079 16406.3975 14441.0338 02/28/2022 15066.3571 15947.6674 14155.1934 03/31/2022 14653.6646 15922.2922 14177.7637 04/30/2022 13544.9384 14737.5738 13287.4905 05/31/2022 13471.0233 14610.9243 13382.8375 06/30/2022 12362.2971 13420.7805 12231.5513 07/31/2022 13193.8418 14159.4846 12650.3057 08/31/2022 12528.6061 13607.2226 12243.4383 09/30/2022 11222.773 12163.3841 11019.9271 10/31/2022 11493.7949 12402.2719 11349.2529 11/30/2022 13132.2459 13943.9939 12688.9762 12/31/2022 12674.5268 13731.1594 12594.0806 01/31/2023 13903.6842 14892.6503 13615.6126 02/28/2023 13496.024 14254.9945 13137.6739 03/31/2023 14169.281 14910.9045 13458.8242 04/30/2023 14286.6377 15061.7989 13692.6526 05/31/2023 13928.3908 14644.7201 13194.8018 06/30/2023 14484.2911 15200.8251 13786.846 07/31/2023 14712.8279 15674.4751 14347.342 08/31/2023 14175.4576 14875.1307 13699.3735 09/30/2023 13335.4305 14090.1975 13266.6757 10/31/2023 12866.0036 13541.835 12719.3207 11/30/2023 14292.8144 14943.2875 13864.2371 12/31/2023 14950.5647 15657.7468 14560.8069 01/31/2024 15173.4302 15538.1051 14416.1563 02/29/2024 15860.599 16132.1315 14781.1433 03/31/2024 16324.9023 16583.1756 15243.1825 04/30/2024 15643.9242 16124.502 14969.4799 05/31/2024 16232.0416 16549.4928 15404.0336 06/30/2024 16461.0979 16703.2129 15389.3378 07/31/2024 16163.9438 16879.5388 15745.6978 08/31/2024 16801.5869 17416.4288 16194.1448 09/30/2024 16776.8241 17859.1088 16630.2031 Effective September 30, 2024, the Fund adopted the MSCI All Country World ex USA Net Total Return USD Index as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the MSCI All Country World ex USA Growth Net Total Return USD Index as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year International Growth Fund Class A (with sales charge) 20.13% 5.68% 5.31% International Growth Fund Class A (without sales charge) 25.81% 6.65% 5.80% MSCI All Country World ex USA Growth Net Total Return USD Index 26.75% 7.09% 5.97% MSCI All Country World ex USA Net Total Return USD Index 25.35% 7.59% 5.22%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment and assumes the deduction of the maximum sales charge associated with that investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fig/TIGAX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 881,600,000
Holdings Count | Holdings	46
Advisory Fees Paid, Amount	$ 7,300,000
Investment Company, Portfolio Turnover	44.57%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $881.6 Number of Holdings 46 Annual Portfolio Turnover 44.57% Total Advisory Fee $7.3
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 3.7 Mid Cap ($2.5-12 B) 14.0 Large Cap (>$12 B) 82.3 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 3.7% Mid Cap ($2.5-12 B) 14.0% Large Cap (>$12 B) 82.3% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg International Growth Fund - Class C
Shareholder Report [Line Items]
Class Name	CLASS: C
Trading Symbol	TIGCX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg International Growth Fund Class C Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $265.00 2.36%
Expenses Paid, Amount	$ 265
Expense Ratio, Percent	2.36%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class C shares underperformed the MSCI All Country World ex USA Growth Net Total Return USD Index (the “Index”) during the 12-month period ended September 30, 2024. During the period, non-U.S. equities have posted strong returns but lagged their U.S. counterparts, as U.S. mega-cap and artificial intelligence beneficiaries have continued to lead the market. The Fund’s underperformance relative to the Index was primarily driven by portfolio allocations across sectors and countries. However, strong stock selection added to relative results, consistent with the Fund’s bottom-up investment process. The Fund’s cash allocation was a drag on performance. Within information technology and consumer services, both stock selection and general positioning versus the Index bolstered relative returns. Security selection within South Korea and Brazil also contributed to relative returns. The Fund’s overweight exposure to consumer staples and the UK were detractors from relative performance as both underperformed other sectors and countries, respectively.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg International Growth Fund MSCI All Country World ex USA Growth Net Total Return USD Index MSCI All Country World ex USA Net Total Return USD Index 09/30/2014 9999.9922 10000 10000 10/31/2014 10238.4744 9965.2434 9900.9916 11/30/2014 10254.6153 10111.108 9972.6147 12/31/2014 9917.1795 9769.5894 9613.0446 01/31/2015 9728.4443 9843.0021 9598.8003 02/28/2015 10563.4548 10348.0743 10111.9989 03/31/2015 10374.7195 10237.4749 9948.5397 04/30/2015 10883.7327 10688.4625 10451.1052 05/31/2015 10866.575 10573.2855 10287.947 06/30/2015 10489.1045 10297.4371 10000.9028 07/31/2015 10614.928 10324.4511 9973.1163 08/31/2015 10123.0725 9548.6733 9210.8418 09/30/2015 9728.4443 9188.0528 8783.7614 10/31/2015 10409.035 9884.1448 9437.6483 11/30/2015 10580.6125 9773.3194 9242.8415 12/31/2015 10466.2275 9647.1785 9068.7492 01/31/2016 9717.0057 9052.0218 8451.8776 02/29/2016 9533.9897 8938.3707 8355.2767 03/31/2016 10094.4763 9614.8521 9034.6429 04/30/2016 9957.2143 9760.6601 9272.3835 05/31/2016 10123.0725 9697.5896 9115.896 06/30/2016 9551.1475 9659.3857 8976.4115 07/31/2016 10174.5457 10124.0498 9420.3444 08/31/2016 10426.1928 10088.1065 9479.93 09/30/2016 10443.3505 10245.1609 9596.794 10/31/2016 10088.757 9896.9171 9458.8142 11/30/2016 9825.6715 9519.9073 9240.0327 12/31/2016 9859.987 9659.2161 9476.419 01/31/2017 10237.4575 10048.094 9812.1147 02/28/2017 10294.65 10250.3038 9968.552 03/31/2017 10900.8905 10540.733 10221.2893 04/30/2017 11461.377 10847.2124 10440.0708 05/31/2017 11953.2325 11329.4527 10778.8762 06/30/2017 11970.3902 11338.0994 10812.3304 07/31/2017 12582.35 11730.9333 11210.8719 08/31/2017 12479.4035 11848.5405 11269.5045 09/30/2017 12868.3125 12056.2887 11478.7062 10/31/2017 12851.1548 12346.2093 11694.6789 11/30/2017 12847.6031 12482.0707 11789.6748 12/31/2017 13150.3885 12751.4199 12053.1957 01/31/2018 14082.4928 13415.7507 12724.4868 02/28/2018 13577.8504 12815.5642 12124.5179 03/31/2018 13370.0564 12640.3685 11910.6517 04/30/2018 13423.4892 12735.1437 12100.8441 05/31/2018 13649.094 12662.8048 11821.4237 06/30/2018 13607.5352 12460.4821 11599.2316 07/31/2018 13773.7704 12674.4469 11876.6458 08/31/2018 13536.2916 12531.6341 11628.0714 09/30/2018 13186.0104 12428.0991 11681.0364 10/31/2018 11974.8685 11264.5737 10730.9268 11/30/2018 11739.3216 11435.2482 10832.4932 12/31/2018 10826.3318 10911.9218 10342.216 01/31/2019 11733.1527 11741.9537 11123.6502 02/28/2019 12023.0886 12059.2274 11340.9771 03/31/2019 12424.0639 12255.4466 11408.5376 04/30/2019 13071.7931 12641.2727 11709.9264 05/31/2019 12047.7641 11992.9922 11081.4186 06/30/2019 12584.454 12789.0587 11748.6972 07/31/2019 12602.9605 12762.3273 11606.5043 08/31/2019 12356.2066 12531.5211 11248.0376 09/30/2019 12257.505 12680.5505 11537.4893 10/31/2019 12652.3114 13141.5977 11940.0432 11/30/2019 12957.4612 13342.0554 12045.3212 12/31/2019 13528.1105 13895.2782 12566.946 01/31/2020 13552.9214 13761.7904 12229.3444 02/29/2020 12914.0422 12757.4105 11262.6833 03/31/2020 11512.2298 11360.0271 9631.9034 04/30/2020 12572.8932 12340.2187 10361.8271 05/31/2020 13739.0026 12877.1087 10700.9334 06/30/2020 14470.9224 13530.5886 11184.5398 07/31/2020 15637.0319 14447.8793 11683.1931 08/31/2020 16344.1408 15037.215 12183.301 09/30/2020 16164.2623 14905.253 11883.8181 10/31/2020 15903.7484 14643.7028 11628.3222 11/30/2020 17121.4072 16132.5836 13192.4946 12/31/2020 17976.8486 16980.1916 13905.5658 01/31/2021 17895.0784 17083.2179 13935.81 02/28/2021 17907.6585 17021.1648 14211.6693 03/31/2021 17347.8476 16967.4193 14391.329 04/30/2021 18222.159 17593.433 14814.9987 05/31/2021 17926.5285 18018.1412 15278.3922 06/30/2021 18190.7089 18087.4848 15179.3838 07/31/2021 18083.7788 17812.7102 14929.2546 08/31/2021 18542.9495 18215.1516 15213.0386 09/30/2021 17328.9775 17432.253 14725.9212 10/31/2021 17888.7884 17972.3643 15077.4162 11/30/2021 16683.9263 17323.236 14398.5013 12/31/2021 17035.594 17845.2061 14993.5549 01/31/2022 15642.4489 16406.3975 14441.0338 02/28/2022 14898.5365 15947.6674 14155.1934 03/31/2022 14479.2404 15922.2922 14177.7637 04/30/2022 13376.8975 14737.5738 13287.4905 05/31/2022 13295.7434 14610.9243 13382.8375 06/30/2022 12193.4005 13420.7805 12231.5513 07/31/2022 12998.1785 14159.4846 12650.3057 08/31/2022 12335.4202 13607.2226 12243.4383 09/30/2022 11043.7177 12163.3841 11019.9271 10/31/2022 11300.7056 12402.2719 11349.2529 11/30/2022 12903.4987 13943.9939 12688.9762 12/31/2022 12443.6256 13731.1594 12594.0806 01/31/2023 13640.6483 14892.6503 13615.6126 02/28/2023 13228.115 14254.9945 13137.6739 03/31/2023 13877.3477 14910.9045 13458.8242 04/30/2023 13985.5531 15061.7989 13692.6526 05/31/2023 13620.3598 14644.7201 13194.8018 06/30/2023 14154.6241 15200.8251 13786.846 07/31/2023 14371.035 15674.4751 14347.342 08/31/2023 13830.0078 14875.1307 13699.3735 09/30/2023 12998.1785 14090.1975 13266.6757 10/31/2023 12531.5425 13541.835 12719.3207 11/30/2023 13911.1619 14943.2875 13864.2371 12/31/2023 14540.106 15657.7468 14560.8069 01/31/2024 14742.9912 15538.1051 14416.1563 02/29/2024 15398.9867 16132.1315 14781.1433 03/31/2024 15838.5713 16583.1756 15243.1825 04/30/2024 15162.2873 16124.502 14969.4799 05/31/2024 15723.603 16549.4928 15404.0336 06/30/2024 15933.251 16703.2129 15389.3378 07/31/2024 15628.9232 16879.5388 15745.6978 08/31/2024 16230.816 17416.4288 16194.1448 09/30/2024 16197.0018 17859.1088 16630.2031 Effective September 30, 2024, the Fund adopted the MSCI All Country World ex USA Net Total Return USD Index as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the MSCI All Country World ex USA Growth Net Total Return USD Index as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year International Growth Fund Class C (with sales charge) 23.61% 5.73% 4.94% International Growth Fund Class C (without sales charge) 24.61% 5.73% 4.94% MSCI All Country World ex USA Growth Net Total Return USD Index 26.75% 7.09% 5.97% MSCI All Country World ex USA Net Total Return USD Index 25.35% 7.59% 5.22%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fig/TIGCX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 881,600,000
Holdings Count | Holdings	46
Advisory Fees Paid, Amount	$ 7,300,000
Investment Company, Portfolio Turnover	44.57%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $881.6 Number of Holdings 46 Annual Portfolio Turnover 44.57% Total Advisory Fee $7.3
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 3.7 Mid Cap ($2.5-12 B) 14.0 Large Cap (>$12 B) 82.3 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 3.7% Mid Cap ($2.5-12 B) 14.0% Large Cap (>$12 B) 82.3% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg International Growth Fund - Class I
Shareholder Report [Line Items]
Class Name	CLASS: I
Trading Symbol	TINGX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg International Growth Fund Class I Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $112.00 0.99%
Expenses Paid, Amount	$ 112
Expense Ratio, Percent	0.99%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class I shares underperformed the MSCI All Country World ex USA Growth Net Total Return USD Index (the “Index”) during the 12-month period ended September 30, 2024. During the period, non-U.S. equities have posted strong returns but lagged their U.S. counterparts, as U.S. mega-cap and artificial intelligence beneficiaries have continued to lead the market. The Fund’s underperformance relative to the Index was primarily driven by portfolio allocations across sectors and countries. However, strong stock selection added to relative results, consistent with the Fund’s bottom-up investment process. The Fund’s cash allocation was a drag on performance. Within information technology and consumer services, both stock selection and general positioning versus the Index bolstered relative returns. Security selection within South Korea and Brazil also contributed to relative returns. The Fund’s overweight exposure to consumer staples and the UK were detractors from relative performance as both underperformed other sectors and countries, respectively.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg International Growth Fund MSCI All Country World ex USA Growth Net Total Return USD Index MSCI All Country World ex USA Net Total Return USD Index 09/30/2014 10000.0066 10000 10000 10/31/2014 10246.0344 9965.2434 9900.9916 11/30/2014 10271.8171 10111.108 9972.6147 12/31/2014 9940.0546 9769.5894 9613.0446 01/31/2015 9762.0721 9843.0021 9598.8003 02/28/2015 10603.4441 10348.0743 10111.9989 03/31/2015 10430.8549 10237.4749 9948.5397 04/30/2015 10948.6223 10688.4625 10451.1052 05/31/2015 10943.2289 10573.2855 10287.947 06/30/2015 10576.477 10297.4371 10000.9028 07/31/2015 10711.3123 10324.4511 9973.1163 08/31/2015 10231.2988 9548.6733 9210.8418 09/30/2015 9841.7046 9188.0528 8783.7614 10/31/2015 10544.6835 9884.1448 9437.6483 11/30/2015 10723.132 9773.3194 9242.8415 12/31/2015 10619.9281 9647.1785 9068.7492 01/31/2016 9867.9312 9052.0218 8451.8776 02/29/2016 9689.3995 8938.3707 8355.2767 03/31/2016 10273.6849 9614.8521 9034.6429 04/30/2016 10138.4337 9760.6601 9272.3835 05/31/2016 10322.3754 9697.5896 9115.896 06/30/2016 9746.8861 9659.3857 8976.4115 07/31/2016 10391.9803 10124.0498 9420.3444 08/31/2016 10663.0283 10088.1065 9479.93 09/30/2016 10690.6855 10245.1609 9596.794 10/31/2016 10337.768 9896.9171 9458.8142 11/30/2016 10082.5815 9519.9073 9240.0327 12/31/2016 10120.588 9659.2161 9476.419 01/31/2017 10516.9415 10048.094 9812.1147 02/28/2017 10592.9545 10250.3038 9968.552 03/31/2017 11222.7765 10540.733 10221.2893 04/30/2017 11814.592 10847.2124 10440.0708 05/31/2017 12330.3945 11329.4527 10778.8762 06/30/2017 12360.0739 11338.0994 10812.3304 07/31/2017 13007.1698 11730.9333 11210.8719 08/31/2017 12914.7275 11848.5405 11269.5045 09/30/2017 13326.5448 12056.2887 11478.7062 10/31/2017 13321.1009 12346.2093 11694.6789 11/30/2017 13328.6244 12482.0707 11789.6748 12/31/2017 13655.3616 12751.4199 12053.1957 01/31/2018 14641.2066 13415.7507 12724.4868 02/28/2018 14122.9338 12815.5642 12124.5179 03/31/2018 13925.7648 12640.3685 11910.6517 04/30/2018 13993.3656 12735.1437 12100.8441 05/31/2018 14235.6018 12662.8048 11821.4237 06/30/2018 14207.4348 12460.4821 11599.2316 07/31/2018 14398.9704 12674.4469 11876.6458 08/31/2018 14162.3676 12531.6341 11628.0714 09/30/2018 13807.4634 12428.0991 11681.0364 10/31/2018 12551.2152 11264.5737 10730.9268 11/30/2018 12316.7194 11435.2482 10832.4932 12/31/2018 11370.1215 10911.9218 10342.216 01/31/2019 12331.8027 11741.9537 11123.6502 02/28/2019 12642.59 12059.2274 11340.9771 03/31/2019 13082.3832 12255.4466 11408.5376 04/30/2019 13774.3246 12641.2727 11709.9264 05/31/2019 12707.093 11992.9922 11081.4186 06/30/2019 13287.6201 12789.0587 11748.6972 07/31/2019 13316.9396 12762.3273 11606.5043 08/31/2019 13064.7915 12531.5211 11248.0376 09/30/2019 12976.8328 12680.5505 11537.4893 10/31/2019 13404.8983 13141.5977 11940.0432 11/30/2019 13741.9396 13342.0554 12045.3212 12/31/2019 14362.3206 13895.2782 12566.946 01/31/2020 14403.6935 13761.7904 12229.3444 02/29/2020 13729.9057 12757.4105 11262.6833 03/31/2020 12252.3007 11360.0271 9631.9034 04/30/2020 13393.0117 12340.2187 10361.8271 05/31/2020 14651.9312 12877.1087 10700.9334 06/30/2020 15443.9275 13530.5886 11184.5398 07/31/2020 16702.8469 14447.8793 11683.1931 08/31/2020 17471.2015 15037.215 12183.301 09/30/2020 17299.7993 14905.253 11883.8181 10/31/2020 17033.8304 14643.7028 11628.3222 11/30/2020 18353.8174 16132.5836 13192.4946 12/31/2020 19293.351 16980.1916 13905.5658 01/31/2021 19221.5395 17083.2179 13935.81 02/28/2021 19245.4766 17021.1648 14211.6693 03/31/2021 18665.0005 16967.4193 14391.329 04/30/2021 19622.4869 17593.433 14814.9987 05/31/2021 19323.2724 18018.1412 15278.3922 06/30/2021 19622.4869 18087.4848 15179.3838 07/31/2021 19526.7383 17812.7102 14929.2546 08/31/2021 20035.4029 18215.1516 15213.0386 09/30/2021 18742.7963 17432.253 14725.9212 10/31/2021 19365.1624 17972.3643 15077.4162 11/30/2021 18081.9106 17323.236 14398.5013 12/31/2021 18483.5892 17845.2061 14993.5549 01/31/2022 16985.2644 16406.3975 14441.0338 02/28/2022 16194.659 15947.6674 14155.1934 03/31/2022 15754.7253 15922.2922 14177.7637 04/30/2022 14568.8173 14737.5738 13287.4905 05/31/2022 14498.6829 14610.9243 13382.8375 06/30/2022 13312.7748 13420.7805 12231.5513 07/31/2022 14205.3938 14159.4846 12650.3057 08/31/2022 13497.6745 13607.2226 12243.4383 09/30/2022 12094.9875 12163.3841 11019.9271 10/31/2022 12388.2766 12402.2719 11349.2529 11/30/2022 14160.7628 13943.9939 12688.9762 12/31/2022 13670.2025 13731.1594 12594.0806 01/31/2023 15005.7601 14892.6503 13615.6126 02/28/2023 14562.7146 14254.9945 13137.6739 03/31/2023 15294.7029 14910.9045 13458.8242 04/30/2023 15429.5428 15061.7989 13692.6526 05/31/2023 15050.7068 14644.7201 13194.8018 06/30/2023 15647.8551 15200.8251 13786.846 07/31/2023 15904.6931 15674.4751 14347.342 08/31/2023 15326.8076 14875.1307 13699.3735 09/30/2023 14421.4537 14090.1975 13266.6757 10/31/2023 13927.0405 13541.835 12719.3207 11/30/2023 15468.0685 14943.2875 13864.2371 12/31/2023 16186.3542 15657.7468 14560.8069 01/31/2024 16431.7978 15538.1051 14416.1563 02/29/2024 17181.0464 16132.1315 14781.1433 03/31/2024 17691.3106 16583.1756 15243.1825 04/30/2024 16961.439 16124.502 14969.4799 05/31/2024 17607.343 16549.4928 15404.0336 06/30/2024 17859.2456 16703.2129 15389.3378 07/31/2024 17542.7526 16879.5388 15745.6978 08/31/2024 18240.329 17416.4288 16194.1448 09/30/2024 18214.4928 17859.1088 16630.2031 Effective September 30, 2024, the Fund adopted the MSCI All Country World ex USA Net Total Return USD Index as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the MSCI All Country World ex USA Growth Net Total Return USD Index as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year International Growth Fund Class I 26.30% 7.02% 6.18% MSCI All Country World ex USA Growth Net Total Return USD Index 26.75% 7.09% 5.97% MSCI All Country World ex USA Net Total Return USD Index 25.35% 7.59% 5.22%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fig/TINGX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 881,600,000
Holdings Count | Holdings	46
Advisory Fees Paid, Amount	$ 7,300,000
Investment Company, Portfolio Turnover	44.57%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $881.6 Number of Holdings 46 Annual Portfolio Turnover 44.57% Total Advisory Fee $7.3
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 3.7 Mid Cap ($2.5-12 B) 14.0 Large Cap (>$12 B) 82.3 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 3.7% Mid Cap ($2.5-12 B) 14.0% Large Cap (>$12 B) 82.3% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg International Growth Fund - Class R3
Shareholder Report [Line Items]
Class Name	CLASS: R3
Trading Symbol	TIGVX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg International Growth Fund Class R3 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R3 $169.00 1.50%
Expenses Paid, Amount	$ 169
Expense Ratio, Percent	1.50%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R3 shares underperformed the MSCI All Country World ex USA Growth Net Total Return USD Index (the “Index”) during the 12-month period ended September 30, 2024. During the period, non-U.S. equities have posted strong returns but lagged their U.S. counterparts, as U.S. mega-cap and artificial intelligence beneficiaries have continued to lead the market. The Fund’s underperformance relative to the Index was primarily driven by portfolio allocations across sectors and countries. However, strong stock selection added to relative results, consistent with the Fund’s bottom-up investment process. The Fund’s cash allocation was a drag on performance. Within information technology and consumer services, both stock selection and general positioning versus the Index bolstered relative returns. Security selection within South Korea and Brazil also contributed to relative returns. The Fund’s overweight exposure to consumer staples and the UK were detractors from relative performance as both underperformed other sectors and countries, respectively.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg International Growth Fund MSCI All Country World ex USA Growth Net Total Return USD Index MSCI All Country World ex USA Net Total Return USD Index 09/30/2014 10000.0011 10000 10000 10/31/2014 10242.2339 9965.2434 9900.9916 11/30/2014 10263.319 10111.108 9972.6147 12/31/2014 9936.0023 9769.5894 9613.0446 01/31/2015 9747.3792 9843.0021 9598.8003 02/28/2015 10585.0879 10348.0743 10111.9989 03/31/2015 10407.5602 10237.4749 9948.5397 04/30/2015 10923.5001 10688.4625 10451.1052 05/31/2015 10912.4046 10573.2855 10287.947 06/30/2015 10540.706 10297.4371 10000.9028 07/31/2015 10673.8518 10324.4511 9973.1163 08/31/2015 10185.6506 9548.6733 9210.8418 09/30/2015 9797.3088 9188.0528 8783.7614 10/31/2015 10490.7763 9884.1448 9437.6483 11/30/2015 10668.304 9773.3194 9242.8415 12/31/2015 10557.3492 9647.1785 9068.7492 01/31/2016 9802.8566 9052.0218 8451.8776 02/29/2016 9625.3289 8938.3707 8355.2767 03/31/2016 10196.7461 9614.8521 9034.6429 04/30/2016 10063.6004 9760.6601 9272.3835 05/31/2016 10241.128 9697.5896 9115.896 06/30/2016 9664.1631 9659.3857 8976.4115 07/31/2016 10302.1532 10124.0498 9420.3444 08/31/2016 10562.897 10088.1065 9479.93 09/30/2016 10584.1551 10245.1609 9596.794 10/31/2016 10234.495 9896.9171 9458.8142 11/30/2016 9973.6375 9519.9073 9240.0327 12/31/2016 10012.4886 9659.2161 9476.419 01/31/2017 10400.9998 10048.094 9812.1147 02/28/2017 10467.6018 10250.3038 9968.552 03/31/2017 11083.6695 10540.733 10221.2893 04/30/2017 11660.8862 10847.2124 10440.0708 05/31/2017 12171.5009 11329.4527 10778.8762 06/30/2017 12193.7015 11338.0994 10812.3304 07/31/2017 12820.8696 11730.9333 11210.8719 08/31/2017 12726.5169 11848.5405 11269.5045 09/30/2017 13131.6786 12056.2887 11478.7062 10/31/2017 13115.0281 12346.2093 11694.6789 11/30/2017 13122.7323 12482.0707 11789.6748 12/31/2017 13439.012 12751.4199 12053.1957 01/31/2018 14399.3522 13415.7507 12724.4868 02/28/2018 13887.5541 12815.5642 12124.5179 03/31/2018 13680.5347 12640.3685 11910.6517 04/30/2018 13743.7906 12735.1437 12100.8441 05/31/2018 13979.5627 12662.8048 11821.4237 06/30/2018 13945.0595 12460.4821 11599.2316 07/31/2018 14123.3262 12674.4469 11876.6458 08/31/2018 13881.8036 12531.6341 11628.0714 09/30/2018 13536.7712 12428.0991 11681.0364 10/31/2018 12294.6545 11264.5737 10730.9268 11/30/2018 12060.9237 11435.2482 10832.4932 12/31/2018 11130.8673 10911.9218 10342.216 01/31/2019 12066.8856 11741.9537 11123.6502 02/28/2019 12364.9806 12059.2274 11340.9771 03/31/2019 12788.2755 12255.4466 11408.5376 04/30/2019 13461.9702 12641.2727 11709.9264 05/31/2019 12412.6758 11992.9922 11081.4186 06/30/2019 12973.0944 12789.0587 11748.6972 07/31/2019 12996.942 12762.3273 11606.5043 08/31/2019 12746.5422 12531.5211 11248.0376 09/30/2019 12657.1137 12680.5505 11537.4893 10/31/2019 13068.4848 13141.5977 11940.0432 11/30/2019 13387.2673 13342.0554 12045.3212 12/31/2019 13986.5183 13895.2782 12566.946 01/31/2020 14022.4734 13761.7904 12229.3444 02/29/2020 13357.3048 12757.4105 11262.6833 03/31/2020 11919.1024 11360.0271 9631.9034 04/30/2020 13021.7242 12340.2187 10361.8271 05/31/2020 14238.2038 12877.1087 10700.9334 06/30/2020 15005.245 13530.5886 11184.5398 07/31/2020 16221.7246 14447.8793 11683.1931 08/31/2020 16958.8033 15037.215 12183.301 09/30/2020 16785.0205 14905.253 11883.8181 10/31/2020 16521.3501 14643.7028 11628.3222 11/30/2020 17793.6907 16132.5836 13192.4946 12/31/2020 18692.1779 16980.1916 13905.5658 01/31/2021 18613.2568 17083.2179 13935.81 02/28/2021 18631.4693 17021.1648 14211.6693 03/31/2021 18060.8085 16967.4193 14391.329 04/30/2021 18983.5792 17593.433 14814.9987 05/31/2021 18680.0362 18018.1412 15278.3922 06/30/2021 18965.3666 18087.4848 15179.3838 07/31/2021 18862.162 17812.7102 14929.2546 08/31/2021 19347.8308 18215.1516 15213.0386 09/30/2021 18091.1628 17432.253 14725.9212 10/31/2021 18692.1779 17972.3643 15077.4162 11/30/2021 17438.63 17323.236 14398.5013 12/31/2021 17815.05 17845.2061 14993.5549 01/31/2022 16367.78 16406.3975 14441.0338 02/28/2022 15601.96 15947.6674 14155.1934 03/31/2022 15173.62 15922.2922 14177.7637 04/30/2022 14024.89 14737.5738 13287.4905 05/31/2022 13953.5 14610.9243 13382.8375 06/30/2022 12804.77 13420.7805 12231.5513 07/31/2022 13661.45 14159.4846 12650.3057 08/31/2022 12973.51 13607.2226 12243.4383 09/30/2022 11617.1 12163.3841 11019.9271 10/31/2022 11896.17 12402.2719 11349.2529 11/30/2022 13590.06 13943.9939 12688.9762 12/31/2022 13118.2108 13731.1594 12594.0806 01/31/2023 14392.3284 14892.6503 13615.6126 02/28/2023 13963.2888 14254.9945 13137.6739 03/31/2023 14652.3524 14910.9045 13458.8242 04/30/2023 14775.8638 15061.7989 13692.6526 05/31/2023 14405.3296 14644.7201 13194.8018 06/30/2023 14977.3824 15200.8251 13786.846 07/31/2023 15217.9046 15674.4751 14347.342 08/31/2023 14658.853 14875.1307 13699.3735 09/30/2023 13787.7726 14090.1975 13266.6757 10/31/2023 13300.2276 13541.835 12719.3207 11/30/2023 14775.8638 14943.2875 13864.2371 12/31/2023 15453.7429 15657.7468 14560.8069 01/31/2024 15681.5782 15538.1051 14416.1563 02/29/2024 16391.1224 16132.1315 14781.1433 03/31/2024 16872.8314 16583.1756 15243.1825 04/30/2024 16163.2871 16124.502 14969.4799 05/31/2024 16768.6781 16549.4928 15404.0336 06/30/2024 17003.023 16703.2129 15389.3378 07/31/2024 16697.0727 16879.5388 15745.6978 08/31/2024 17354.5403 17416.4288 16194.1448 09/30/2024 17321.9924 17859.1088 16630.2031 Effective September 30, 2024, the Fund adopted the MSCI All Country World ex USA Net Total Return USD Index as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the MSCI All Country World ex USA Growth Net Total Return USD Index as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year International Growth Fund Class R3 25.63% 6.48% 5.65% MSCI All Country World ex USA Growth Net Total Return USD Index 26.75% 7.09% 5.97% MSCI All Country World ex USA Net Total Return USD Index 25.35% 7.59% 5.22%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fig/TIGVX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 881,600,000
Holdings Count | Holdings	46
Advisory Fees Paid, Amount	$ 7,300,000
Investment Company, Portfolio Turnover	44.57%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $881.6 Number of Holdings 46 Annual Portfolio Turnover 44.57% Total Advisory Fee $7.3
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 3.7 Mid Cap ($2.5-12 B) 14.0 Large Cap (>$12 B) 82.3 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 3.7% Mid Cap ($2.5-12 B) 14.0% Large Cap (>$12 B) 82.3% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg International Growth Fund - Class R4
Shareholder Report [Line Items]
Class Name	CLASS: R4
Trading Symbol	TINVX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg International Growth Fund Class R4 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R4 $158.00 1.40%
Expenses Paid, Amount	$ 158
Expense Ratio, Percent	1.40%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R4 shares underperformed the MSCI All Country World ex USA Growth Net Total Return USD Index (the “Index”) during the 12-month period ended September 30, 2024. During the period, non-U.S. equities have posted strong returns but lagged their U.S. counterparts, as U.S. mega-cap and artificial intelligence beneficiaries have continued to lead the market. The Fund’s underperformance relative to the Index was primarily driven by portfolio allocations across sectors and countries. However, strong stock selection added to relative results, consistent with the Fund’s bottom-up investment process. The Fund’s cash allocation was a drag on performance. Within information technology and consumer services, both stock selection and general positioning versus the Index bolstered relative returns. Security selection within South Korea and Brazil also contributed to relative returns. The Fund’s overweight exposure to consumer staples and the UK were detractors from relative performance as both underperformed other sectors and countries, respectively.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg International Growth Fund MSCI All Country World ex USA Growth Net Total Return USD Index MSCI All Country World ex USA Net Total Return USD Index 09/30/2014 10000.004 10000 10000 10/31/2014 10242.1094 9965.2434 9900.9916 11/30/2014 10263.1842 10111.108 9972.6147 12/31/2014 9930.504 9769.5894 9613.0446 01/31/2015 9747.5299 9843.0021 9598.8003 02/28/2015 10590.3197 10348.0743 10111.9989 03/31/2015 10412.8903 10237.4749 9948.5397 04/30/2015 10922.9999 10688.4625 10451.1052 05/31/2015 10917.4552 10573.2855 10287.947 06/30/2015 10545.9623 10297.4371 10000.9028 07/31/2015 10673.4898 10324.4511 9973.1163 08/31/2015 10191.1035 9548.6733 9210.8418 09/30/2015 9802.9766 9188.0528 8783.7614 10/31/2015 10501.605 9884.1448 9437.6483 11/30/2015 10673.4898 9773.3194 9242.8415 12/31/2015 10568.141 9647.1785 9068.7492 01/31/2016 9814.0659 9052.0218 8451.8776 02/29/2016 9636.6365 8938.3707 8355.2767 03/31/2016 10213.2821 9614.8521 9034.6429 04/30/2016 10074.6654 9760.6601 9272.3835 05/31/2016 10257.6395 9697.5896 9115.896 06/30/2016 9675.4492 9659.3857 8976.4115 07/31/2016 10313.0862 10124.0498 9420.3444 08/31/2016 10579.2304 10088.1065 9479.93 09/30/2016 10603.8715 10245.1609 9596.794 10/31/2016 10254.2933 9896.9171 9458.8142 11/30/2016 9993.4969 9519.9073 9240.0327 12/31/2016 10026.79 9659.2161 9476.419 01/31/2017 10420.7591 10048.094 9812.1147 02/28/2017 10487.3454 10250.3038 9968.552 03/31/2017 11108.8177 10540.733 10221.2893 04/30/2017 11691.448 10847.2124 10440.0708 05/31/2017 12201.9431 11329.4527 10778.8762 06/30/2017 12224.1386 11338.0994 10812.3304 07/31/2017 12856.7086 11730.9333 11210.8719 08/31/2017 12762.378 11848.5405 11269.5045 09/30/2017 13168.6313 12056.2887 11478.7062 10/31/2017 13151.9832 12346.2093 11694.6789 11/30/2017 13159.667 12482.0707 11789.6748 12/31/2017 13475.867 12751.4199 12053.1957 01/31/2018 14441.7141 13415.7507 12724.4868 02/28/2018 13930.0451 12815.5642 12124.5179 03/31/2018 13728.8269 12640.3685 11910.6517 04/30/2018 13792.0669 12735.1437 12100.8441 05/31/2018 14027.7796 12662.8048 11821.4237 06/30/2018 13993.2851 12460.4821 11599.2316 07/31/2018 14177.2559 12674.4469 11876.6458 08/31/2018 13935.7942 12531.6341 11628.0714 09/30/2018 13585.0997 12428.0991 11681.0364 10/31/2018 12343.2962 11264.5737 10730.9268 11/30/2018 12109.643 11435.2482 10832.4932 12/31/2018 11174.0063 10911.9218 10342.216 01/31/2019 12121.562 11741.9537 11123.6502 02/28/2019 12419.5355 12059.2274 11340.9771 03/31/2019 12842.6578 12255.4466 11408.5376 04/30/2019 13522.0374 12641.2727 11709.9264 05/31/2019 12467.2112 11992.9922 11081.4186 06/30/2019 13033.3609 12789.0587 11748.6972 07/31/2019 13057.1988 12762.3273 11606.5043 08/31/2019 12806.901 12531.5211 11248.0376 09/30/2019 12717.509 12680.5505 11537.4893 10/31/2019 13134.6719 13141.5977 11940.0432 11/30/2019 13459.3053 13342.0554 12045.3212 12/31/2019 14058.2953 13895.2782 12566.946 01/31/2020 14094.2347 13761.7904 12229.3444 02/29/2020 13429.3558 12757.4105 11262.6833 03/31/2020 11979.8 11360.0271 9631.9034 04/30/2020 13093.9214 12340.2187 10361.8271 05/31/2020 14315.861 12877.1087 10700.9334 06/30/2020 15088.5581 13530.5886 11184.5398 07/31/2020 16310.4977 14447.8793 11683.1931 08/31/2020 17053.2453 15037.215 12183.301 09/30/2020 16879.5382 14905.253 11883.8181 10/31/2020 16615.9826 14643.7028 11628.3222 11/30/2020 17899.8035 16132.5836 13192.4946 12/31/2020 18803.8953 16980.1916 13905.5658 01/31/2021 18731.0825 17083.2179 13935.81 02/28/2021 18749.2857 17021.1648 14211.6693 03/31/2021 18178.9191 16967.4193 14391.329 04/30/2021 19101.214 17593.433 14814.9987 05/31/2021 18803.8953 18018.1412 15278.3922 06/30/2021 19095.1463 18087.4848 15179.3838 07/31/2021 18985.9272 17812.7102 14929.2546 08/31/2021 19477.4133 18215.1516 15213.0386 09/30/2021 18215.3255 17432.253 14725.9212 10/31/2021 18816.0307 17972.3643 15077.4162 11/30/2021 17563.3681 17323.236 14398.5013 12/31/2021 17945.8851 17845.2061 14993.5549 01/31/2022 16487.1336 16406.3975 14441.0338 02/28/2022 15709.1328 15947.6674 14155.1934 03/31/2022 15281.2324 15922.2922 14177.7637 04/30/2022 14127.1979 14737.5738 13287.4905 05/31/2022 14055.8811 14610.9243 13382.8375 06/30/2022 12895.3633 13420.7805 12231.5513 07/31/2022 13764.1308 14159.4846 12650.3057 08/31/2022 13070.4134 13607.2226 12243.4383 09/30/2022 11708.912 12163.3841 11019.9271 10/31/2022 11987.6957 12402.2719 11349.2529 11/30/2022 13699.2974 13943.9939 12688.9762 12/31/2022 13218.0381 13731.1594 12594.0806 01/31/2023 14506.0162 14892.6503 13615.6126 02/28/2023 14076.6902 14254.9945 13137.6739 03/31/2023 14772.7187 14910.9045 13458.8242 04/30/2023 14896.3126 15061.7989 13692.6526 05/31/2023 14525.531 14644.7201 13194.8018 06/30/2023 15104.4707 15200.8251 13786.846 07/31/2023 15345.1535 15674.4751 14347.342 08/31/2023 14779.2237 14875.1307 13699.3735 09/30/2023 13907.5617 14090.1975 13266.6757 10/31/2023 13419.6912 13541.835 12719.3207 11/30/2023 14902.8175 14943.2875 13864.2371 12/31/2023 15588.1245 15657.7468 14560.8069 01/31/2024 15822.8265 15538.1051 14416.1563 02/29/2024 16533.452 16132.1315 14781.1433 03/31/2024 17022.4145 16583.1756 15243.1825 04/30/2024 16311.789 16124.502 14969.4799 05/31/2024 16924.622 16549.4928 15404.0336 06/30/2024 17159.324 16703.2129 15389.3378 07/31/2024 16852.9075 16879.5388 15745.6978 08/31/2024 17517.8965 17416.4288 16194.1448 09/30/2024 17491.8185 17859.1088 16630.2031 Effective September 30, 2024, the Fund adopted the MSCI All Country World ex USA Net Total Return USD Index as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the MSCI All Country World ex USA Growth Net Total Return USD Index as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year International Growth Fund Class R4 25.77% 6.58% 5.75% MSCI All Country World ex USA Growth Net Total Return USD Index 26.75% 7.09% 5.97% MSCI All Country World ex USA Net Total Return USD Index 25.35% 7.59% 5.22%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fig/TINVX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 881,600,000
Holdings Count | Holdings	46
Advisory Fees Paid, Amount	$ 7,300,000
Investment Company, Portfolio Turnover	44.57%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $881.6 Number of Holdings 46 Annual Portfolio Turnover 44.57% Total Advisory Fee $7.3
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 3.7 Mid Cap ($2.5-12 B) 14.0 Large Cap (>$12 B) 82.3 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 3.7% Mid Cap ($2.5-12 B) 14.0% Large Cap (>$12 B) 82.3% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg International Growth Fund - Class R5
Shareholder Report [Line Items]
Class Name	CLASS: R5
Trading Symbol	TINFX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg International Growth Fund Class R5 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R5 $112.00 0.99%
Expenses Paid, Amount	$ 112
Expense Ratio, Percent	0.99%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R5 shares underperformed the MSCI All Country World ex USA Growth Net Total Return USD Index (the “Index”) during the 12-month period ended September 30, 2024. During the period, non-U.S. equities have posted strong returns but lagged their U.S. counterparts, as U.S. mega-cap and artificial intelligence beneficiaries have continued to lead the market. The Fund’s underperformance relative to the Index was primarily driven by portfolio allocations across sectors and countries. However, strong stock selection added to relative results, consistent with the Fund’s bottom-up investment process. The Fund’s cash allocation was a drag on performance. Within information technology and consumer services, both stock selection and general positioning versus the Index bolstered relative returns. Security selection within South Korea and Brazil also contributed to relative returns. The Fund’s overweight exposure to consumer staples and the UK were detractors from relative performance as both underperformed other sectors and countries, respectively.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg International Growth Fund MSCI All Country World ex USA Growth Net Total Return USD Index MSCI All Country World ex USA Net Total Return USD Index 09/30/2014 10000.0009 10000 10000 10/31/2014 10245.5253 9965.2434 9900.9916 11/30/2014 10270.9927 10111.108 9972.6147 12/31/2014 9945.0859 9769.5894 9613.0446 01/31/2015 9762.1136 9843.0021 9598.8003 02/28/2015 10607.0153 10348.0743 10111.9989 03/31/2015 10434.8061 10237.4749 9948.5397 04/30/2015 10951.4339 10688.4625 10451.1052 05/31/2015 10946.0524 10573.2855 10287.947 06/30/2015 10580.1076 10297.4371 10000.9028 07/31/2015 10714.6461 10324.4511 9973.1163 08/31/2015 10235.6891 9548.6733 9210.8418 09/30/2015 9846.7693 9188.0528 8783.7614 10/31/2015 10548.1829 9884.1448 9437.6483 11/30/2015 10726.2341 9773.3194 9242.8415 12/31/2015 10622.9885 9647.1785 9068.7492 01/31/2016 9872.6859 9052.0218 8451.8776 02/29/2016 9694.5566 8938.3707 8355.2767 03/31/2016 10277.5254 9614.8521 9034.6429 04/30/2016 10142.5789 9760.6601 9272.3835 05/31/2016 10326.1062 9697.5896 9115.896 06/30/2016 9752.1385 9659.3857 8976.4115 07/31/2016 10395.7905 10124.0498 9420.3444 08/31/2016 10666.2325 10088.1065 9479.93 09/30/2016 10689.8324 10245.1609 9596.794 10/31/2016 10343.0765 9896.9171 9458.8142 11/30/2016 10083.0097 9519.9073 9240.0327 12/31/2016 10126.3541 9659.2161 9476.419 01/31/2017 10521.8725 10048.094 9812.1147 02/28/2017 10592.3073 10250.3038 9968.552 03/31/2017 11226.2203 10540.733 10221.2893 04/30/2017 11816.7889 10847.2124 10440.0708 05/31/2017 12336.9226 11329.4527 10778.8762 06/30/2017 12364.4866 11338.0994 10812.3304 07/31/2017 13010.1092 11730.9333 11210.8719 08/31/2017 12917.8774 11848.5405 11269.5045 09/30/2017 13328.4593 12056.2887 11478.7062 10/31/2017 13323.028 12346.2093 11694.6789 11/30/2017 13330.5214 12482.0707 11789.6748 12/31/2017 13662.0984 12751.4199 12053.1957 01/31/2018 14645.5897 13415.7507 12724.4868 02/28/2018 14128.5543 12815.5642 12124.5179 03/31/2018 13926.2361 12640.3685 11910.6517 04/30/2018 13999.2954 12735.1437 12100.8441 05/31/2018 14240.9533 12662.8048 11821.4237 06/30/2018 14212.8535 12460.4821 11599.2316 07/31/2018 14398.3119 12674.4469 11876.6458 08/31/2018 14162.274 12531.6341 11628.0714 09/30/2018 13813.8371 12428.0991 11681.0364 10/31/2018 12549.3483 11264.5737 10730.9268 11/30/2018 12315.2241 11435.2482 10832.4932 12/31/2018 11375.2742 10911.9218 10342.216 01/31/2019 12334.4232 11741.9537 11123.6502 02/28/2019 12644.3921 12059.2274 11340.9771 03/31/2019 13083.0274 12255.4466 11408.5376 04/30/2019 13778.9953 12641.2727 11709.9264 05/31/2019 12708.7253 11992.9922 11081.4186 06/30/2019 13287.7238 12789.0587 11748.6972 07/31/2019 13322.8147 12762.3273 11606.5043 08/31/2019 13071.3304 12531.5211 11248.0376 09/30/2019 12977.7549 12680.5505 11537.4893 10/31/2019 13410.5417 13141.5977 11940.0432 11/30/2019 13746.6772 13342.0554 12045.3212 12/31/2019 14365.2621 13895.2782 12566.946 01/31/2020 14406.5246 13761.7904 12229.3444 02/29/2020 13728.6399 12757.4105 11262.6833 03/31/2020 12254.9774 11360.0271 9631.9034 04/30/2020 13392.6448 12340.2187 10361.8271 05/31/2020 14654.0999 12877.1087 10700.9334 06/30/2020 15449.8776 13530.5886 11184.5398 07/31/2020 16705.4381 14447.8793 11683.1931 08/31/2020 17477.6373 15037.215 12183.301 09/30/2020 17300.7977 14905.253 11883.8181 10/31/2020 17035.5385 14643.7028 11628.3222 11/30/2020 18357.9064 16132.5836 13192.4946 12/31/2020 19294.8996 16980.1916 13905.5658 01/31/2021 19223.2823 17083.2179 13935.81 02/28/2021 19247.1548 17021.1648 14211.6693 03/31/2021 18668.2481 16967.4193 14391.329 04/30/2021 19623.1457 17593.433 14814.9987 05/31/2021 19324.7402 18018.1412 15278.3922 06/30/2021 19629.1138 18087.4848 15179.3838 07/31/2021 19527.6559 17812.7102 14929.2546 08/31/2021 20040.9134 18215.1516 15213.0386 09/30/2021 18745.8335 17432.253 14725.9212 10/31/2021 19372.4851 17972.3643 15077.4162 11/30/2021 18080.275 17323.236 14398.5013 12/31/2021 18480.7874 17845.2061 14993.5549 01/31/2022 16986.8125 16406.3975 14441.0338 02/28/2022 16198.5023 15947.6674 14155.1934 03/31/2022 15759.8459 15922.2922 14177.7637 04/30/2022 14571.0233 14737.5738 13287.4905 05/31/2022 14501.0925 14610.9243 13382.8375 06/30/2022 13312.27 13420.7805 12231.5513 07/31/2022 14208.6549 14159.4846 12650.3057 08/31/2022 13502.9902 13607.2226 12243.4383 09/30/2022 12098.018 12163.3841 11019.9271 10/31/2022 12390.4557 12402.2719 11349.2529 11/30/2022 14164.1535 13943.9939 12688.9762 12/31/2022 13671.4725 13731.1594 12594.0806 01/31/2023 15009.804 14892.6503 13615.6126 02/28/2023 14567.9625 14254.9945 13137.6739 03/31/2023 15297.9615 14910.9045 13458.8242 04/30/2023 15432.435 15061.7989 13692.6526 05/31/2023 15048.225 14644.7201 13194.8018 06/30/2023 15656.5575 15200.8251 13786.846 07/31/2023 15906.294 15674.4751 14347.342 08/31/2023 15329.979 14875.1307 13699.3735 09/30/2023 14427.0855 14090.1975 13266.6757 10/31/2023 13927.6125 13541.835 12719.3207 11/30/2023 15470.856 14943.2875 13864.2371 12/31/2023 16191.7209 15657.7468 14560.8069 01/31/2024 16436.3672 15538.1051 14416.1563 02/29/2024 17183.1821 16132.1315 14781.1433 03/31/2024 17698.2269 16583.1756 15243.1825 04/30/2024 16964.2881 16124.502 14969.4799 05/31/2024 17608.0941 16549.4928 15404.0336 06/30/2024 17859.1784 16703.2129 15389.3378 07/31/2024 17537.2754 16879.5388 15745.6978 08/31/2024 18239.024 17416.4288 16194.1448 09/30/2024 18213.2717 17859.1088 16630.2031 Effective September 30, 2024, the Fund adopted the MSCI All Country World ex USA Net Total Return USD Index as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the MSCI All Country World ex USA Growth Net Total Return USD Index as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year International Growth Fund Class R5 26.24% 7.01% 6.18% MSCI All Country World ex USA Growth Net Total Return USD Index 26.75% 7.09% 5.97% MSCI All Country World ex USA Net Total Return USD Index 25.35% 7.59% 5.22%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fig/TINFX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 881,600,000
Holdings Count | Holdings	46
Advisory Fees Paid, Amount	$ 7,300,000
Investment Company, Portfolio Turnover	44.57%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $881.6 Number of Holdings 46 Annual Portfolio Turnover 44.57% Total Advisory Fee $7.3
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 3.7 Mid Cap ($2.5-12 B) 14.0 Large Cap (>$12 B) 82.3 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 3.7% Mid Cap ($2.5-12 B) 14.0% Large Cap (>$12 B) 82.3% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg International Growth Fund - Class R6
Shareholder Report [Line Items]
Class Name	CLASS: R6
Trading Symbol	THGIX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg International Growth Fund Class R6 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R6 $101.00 0.89%
Expenses Paid, Amount	$ 101
Expense Ratio, Percent	0.89%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R6 shares underperformed the MSCI All Country World ex USA Growth Net Total Return USD Index (the “Index”) during the 12-month period ended September 30, 2024. During the period, non-U.S. equities have posted strong returns but lagged their U.S. counterparts, as U.S. mega-cap and artificial intelligence beneficiaries have continued to lead the market. The Fund’s underperformance relative to the Index was primarily driven by portfolio allocations across sectors and countries. However, strong stock selection added to relative results, consistent with the Fund’s bottom-up investment process. The Fund’s cash allocation was a drag on performance. Within information technology and consumer services, both stock selection and general positioning versus the Index bolstered relative returns. Security selection within South Korea and Brazil also contributed to relative returns. The Fund’s overweight exposure to consumer staples and the UK were detractors from relative performance as both underperformed other sectors and countries, respectively.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg International Growth Fund MSCI All Country World ex USA Growth Net Total Return USD Index MSCI All Country World ex USA Net Total Return USD Index 09/30/2014 10000.0094 10000 10000 10/31/2014 10250.1372 9965.2434 9900.9916 11/30/2014 10275.8066 10111.108 9972.6147 12/31/2014 9947.8143 9769.5894 9613.0446 01/31/2015 9765.187 9843.0021 9598.8003 02/28/2015 10613.8666 10348.0743 10111.9989 03/31/2015 10436.6108 10237.4749 9948.5397 04/30/2015 10957.6356 10688.4625 10451.1052 05/31/2015 10952.2642 10573.2855 10287.947 06/30/2015 10587.0097 10297.4371 10000.9028 07/31/2015 10721.2944 10324.4511 9973.1163 08/31/2015 10243.2407 9548.6733 9210.8418 09/30/2015 9856.8468 9188.0528 8783.7614 10/31/2015 10557.4428 9884.1448 9437.6483 11/30/2015 10740.6756 9773.3194 9242.8415 12/31/2015 10634.8777 9647.1785 9068.7492 01/31/2016 9885.259 9052.0218 8451.8776 02/29/2016 9707.292 8938.3707 8355.2767 03/31/2016 10289.7295 9614.8521 9034.6429 04/30/2016 10160.299 9760.6601 9272.3835 05/31/2016 10343.6589 9697.5896 9115.896 06/30/2016 9764.4099 9659.3857 8976.4115 07/31/2016 10413.2079 10124.0498 9420.3444 08/31/2016 10683.5404 10088.1065 9479.93 09/30/2016 10709.8835 10245.1609 9596.794 10/31/2016 10363.1801 9896.9171 9458.8142 11/30/2016 10103.1526 9519.9073 9240.0327 12/31/2016 10146.4905 9659.2161 9476.419 01/31/2017 10547.3663 10048.094 9812.1147 02/28/2017 10617.7904 10250.3038 9968.552 03/31/2017 11251.6075 10540.733 10221.2893 04/30/2017 11842.0866 10847.2124 10440.0708 05/31/2017 12367.5589 11329.4527 10778.8762 06/30/2017 12394.4527 11338.0994 10812.3304 07/31/2017 13040.506 11730.9333 11210.8719 08/31/2017 12953.6417 11848.5405 11269.5045 09/30/2017 13367.8617 12056.2887 11478.7062 10/31/2017 13362.4254 12346.2093 11694.6789 11/30/2017 13375.5128 12482.0707 11789.6748 12/31/2017 13701.7448 12751.4199 12053.1957 01/31/2018 14691.6903 13415.7507 12724.4868 02/28/2018 14174.2188 12815.5642 12124.5179 03/31/2018 13977.3547 12640.3685 11910.6517 04/30/2018 14044.8509 12735.1437 12100.8441 05/31/2018 14292.3373 12662.8048 11821.4237 06/30/2018 14264.2138 12460.4821 11599.2316 07/31/2018 14455.4533 12674.4469 11876.6458 08/31/2018 14219.2163 12531.6341 11628.0714 09/30/2018 13864.8608 12428.0991 11681.0364 10/31/2018 12604.9303 11264.5737 10730.9268 11/30/2018 12370.815 11435.2482 10832.4932 12/31/2018 11422.134 10911.9218 10342.216 01/31/2019 12389.1181 11741.9537 11123.6502 02/28/2019 12699.7252 12059.2274 11340.9771 03/31/2019 13139.2634 12255.4466 11408.5376 04/30/2019 13836.6641 12641.2727 11709.9264 05/31/2019 12770.0513 11992.9922 11081.4186 06/30/2019 13350.2418 12789.0587 11748.6972 07/31/2019 13385.4048 12762.3273 11606.5043 08/31/2019 13133.4029 12531.5211 11248.0376 09/30/2019 13045.4953 12680.5505 11537.4893 10/31/2019 13479.173 13141.5977 11940.0432 11/30/2019 13815.9928 13342.0554 12045.3212 12/31/2019 14437.8366 13895.2782 12566.946 01/31/2020 14479.2227 13761.7904 12229.3444 02/29/2020 13805.2205 12757.4105 11262.6833 03/31/2020 12321.2332 11360.0271 9631.9034 04/30/2020 13468.2194 12340.2187 10361.8271 05/31/2020 14739.3639 12877.1087 10700.9334 06/30/2020 15537.5244 13530.5886 11184.5398 07/31/2020 16802.7566 14447.8793 11683.1931 08/31/2020 17577.2679 15037.215 12183.301 09/30/2020 17405.8112 14905.253 11883.8181 10/31/2020 17139.7577 14643.7028 11628.3222 11/30/2020 18466.0696 16132.5836 13192.4946 12/31/2020 19411.8197 16980.1916 13905.5658 01/31/2021 19339.9906 17083.2179 13935.81 02/28/2021 19369.9194 17021.1648 14211.6693 03/31/2021 18789.3006 16967.4193 14391.329 04/30/2021 19753.008 17593.433 14814.9987 05/31/2021 19453.72 18018.1412 15278.3922 06/30/2021 19758.9938 18087.4848 15179.3838 07/31/2021 19663.2216 17812.7102 14929.2546 08/31/2021 20177.997 18215.1516 15213.0386 09/30/2021 18879.087 17432.253 14725.9212 10/31/2021 19507.5918 17972.3643 15077.4162 11/30/2021 18211.8894 17323.236 14398.5013 12/31/2021 18619.8561 17845.2061 14993.5549 01/31/2022 17115.4788 16406.3975 14441.0338 02/28/2022 16318.6688 15947.6674 14155.1934 03/31/2022 15878.8297 15922.2922 14177.7637 04/30/2022 14680.4274 14737.5738 13287.4905 05/31/2022 14610.3082 14610.9243 13382.8375 06/30/2022 13418.2804 13420.7805 12231.5513 07/31/2022 14323.4566 14159.4846 12650.3057 08/31/2022 13609.5148 13607.2226 12243.4383 09/30/2022 12194.3802 12163.3841 11019.9271 10/31/2022 12493.9808 12402.2719 11349.2529 11/30/2022 14278.8352 13943.9939 12688.9762 12/31/2022 13786.8802 13731.1594 12594.0806 01/31/2023 15130.2173 14892.6503 13615.6126 02/28/2023 14693.1507 14254.9945 13137.6739 03/31/2023 15425.88 14910.9045 13458.8242 04/30/2023 15560.8565 15061.7989 13692.6526 05/31/2023 15181.6369 14644.7201 13194.8018 06/30/2023 15792.2447 15200.8251 13786.846 07/31/2023 16049.3426 15674.4751 14347.342 08/31/2023 15470.8722 14875.1307 13699.3735 09/30/2023 14558.1743 14090.1975 13266.6757 10/31/2023 14056.8331 13541.835 12719.3207 11/30/2023 15612.276 14943.2875 13864.2371 12/31/2023 16341.6485 15657.7468 14560.8069 01/31/2024 16594.0542 15538.1051 14416.1563 02/29/2024 17344.7992 16132.1315 14781.1433 03/31/2024 17869.0263 16583.1756 15243.1825 04/30/2024 17124.7532 16124.502 14969.4799 05/31/2024 17778.4192 16549.4928 15404.0336 06/30/2024 18037.2968 16703.2129 15389.3378 07/31/2024 17713.6998 16879.5388 15745.6978 08/31/2024 18425.6132 17416.4288 16194.1448 09/30/2024 18399.7254 17859.1088 16630.2031 Effective September 30, 2024, the Fund adopted the MSCI All Country World ex USA Net Total Return USD Index as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the MSCI All Country World ex USA Growth Net Total Return USD Index as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year International Growth Fund Class R6 26.39% 7.12% 6.29% MSCI All Country World ex USA Growth Net Total Return USD Index 26.75% 7.09% 5.97% MSCI All Country World ex USA Net Total Return USD Index 25.35% 7.59% 5.22%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fig/THGIX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 881,600,000
Holdings Count | Holdings	46
Advisory Fees Paid, Amount	$ 7,300,000
Investment Company, Portfolio Turnover	44.57%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $881.6 Number of Holdings 46 Annual Portfolio Turnover 44.57% Total Advisory Fee $7.3
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 3.7 Mid Cap ($2.5-12 B) 14.0 Large Cap (>$12 B) 82.3 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 3.7% Mid Cap ($2.5-12 B) 14.0% Large Cap (>$12 B) 82.3% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Developing World Fund Class A
Shareholder Report [Line Items]
Class Name	CLASS: A
Trading Symbol	THDAX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Developing World Fund Class A Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $161.00 1.47%
Expenses Paid, Amount	$ 161
Expense Ratio, Percent	1.47%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class A shares underperformed the MSCI Emerging Markets Net Total Return USD Index (the “Index”) during the 12-month period ended September 30, 2024. During the period, emerging market equities have posted strong returns but lagged their developed world counterparts. Much of emerging market underperformance was driven by China, where concerns around the real estate market, a weaker-than-expected recovery from COVID-19, and broadly slower economic growth weighed on sentiment. The Fund’s underperformance was primarily driven by weaker security selection as well as the Fund’s sector and country positioning. The currency effect on the Fund’s performance was modestly positive. Positive contributors included stock selection within the consumer staples, information technology and real estate sectors as well as an underweight allocation to materials. Stock selection in consumer discretionary and industrials hampered relative performance. On a geographic basis, positive stock selection in India and South Korea bolstered relative returns while weaker stock selection in China and Brazil were negative contributors to relative performance.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Developing World Fund MSCI Emerging Markets Net Total Return USD Index 09/30/2014 9548.4932 10000 10/31/2014 9779.381 10117.8941 11/30/2014 9799.9044 10010.8928 12/31/2014 9322.7363 9549.5193 01/31/2015 9230.3812 9606.7659 02/28/2015 9291.9512 9904.2244 03/31/2015 9122.6335 9763.3793 04/30/2015 9533.1007 10514.3152 05/31/2015 9394.568 10093.2546 06/30/2015 9194.4653 9831.1381 07/31/2015 8804.5214 9149.6497 08/31/2015 8045.1571 8322.0838 09/30/2015 7722.8499 8071.7401 10/31/2015 8118.4982 8647.5115 11/30/2015 7979.7644 8310.1921 12/31/2015 7892.4134 8124.9435 01/31/2016 7558.4246 7597.8566 02/29/2016 7455.6588 7585.4179 03/31/2016 8154.4662 8589.171 04/30/2016 8344.583 8635.8577 05/31/2016 8195.5726 8313.7121 06/30/2016 8277.7852 8645.9894 07/31/2016 8642.6038 9081.0822 08/31/2016 8740.2313 9306.7626 09/30/2016 8742.6284 9426.4404 10/31/2016 8665.3967 9448.9157 11/30/2016 8129.9236 9013.9656 12/31/2016 8093.8822 9033.8723 01/31/2017 8356.4699 9528.2332 02/28/2017 8510.9333 9819.9124 03/31/2017 8768.3723 10067.8064 04/30/2017 9061.8528 10288.2068 05/31/2017 9257.5064 10592.3722 06/30/2017 9474.9718 10699.0168 07/31/2017 9949.7525 11336.7677 08/31/2017 10104.5723 11589.6561 09/30/2017 10279.2778 11543.564 10/31/2017 10522.5437 11948.2379 11/30/2017 10698.5233 11972.2115 12/31/2017 10952.1409 12401.9769 01/31/2018 11795.8077 13435.6494 02/28/2018 11210.9344 12815.9976 03/31/2018 10884.8546 12577.7121 04/30/2018 10693.3474 12522.0591 05/31/2018 10470.785 12078.3567 06/30/2018 10139.5293 11576.5277 07/31/2018 10387.9711 11830.8432 08/31/2018 9958.3739 11510.9332 09/30/2018 9901.4393 11449.8575 10/31/2018 9109.5312 10452.7639 11/30/2018 9570.1836 10883.5281 12/31/2018 9289.4932 10595.25 01/31/2019 10192.856 11522.8962 02/28/2019 10375.6172 11548.7963 03/31/2019 10641.9265 11645.7135 04/30/2019 10965.675 11890.8962 05/31/2019 10255.517 11028.0596 06/30/2019 11049.223 11716.3501 07/31/2019 10876.9052 11573.0791 08/31/2019 10511.3827 11008.8189 09/30/2019 10668.0352 11218.9687 10/31/2019 11127.5493 11692.0435 11/30/2019 11174.545 11675.9422 12/31/2019 11988.1657 12547.0316 01/31/2020 11555.6846 11962.1512 02/29/2020 10922.7854 11331.345 03/31/2020 9013.5394 9586.0744 04/30/2020 9894.3242 10463.8945 05/31/2020 10131.6614 10544.2822 06/30/2020 10959.7045 11319.382 07/31/2020 11893.2308 12330.8884 08/31/2020 12278.2445 12603.4695 09/30/2020 12088.3747 12401.3109 10/31/2020 12510.3075 12656.8156 11/30/2020 13686.4452 13827.4089 12/31/2020 14704.3581 14843.9098 01/31/2021 15131.565 15299.0044 02/28/2021 15458.563 15416.0186 03/31/2021 14920.5986 15183.1795 04/30/2021 15163.21 15561.216 05/31/2021 15316.1606 15922.0809 06/30/2021 15558.772 15949.5269 07/31/2021 14720.1806 14876.1362 08/31/2021 15105.1942 15265.5412 09/30/2021 14546.1333 14658.8752 10/31/2021 14693.8098 14803.4543 11/30/2021 13929.0566 14200.1655 12/31/2021 14261.3286 14466.6105 01/31/2022 13765.5576 14192.7689 02/28/2022 13127.3842 13768.5451 03/31/2022 12763.4672 13457.5776 04/30/2022 11692.8127 12708.9725 05/31/2022 11988.1657 12764.9348 06/30/2022 11044.091 11916.7012 07/31/2022 10975.527 11887.4238 08/31/2022 10964.9786 11937.0597 09/30/2022 9720.2769 10537.6467 10/31/2022 9240.3283 10210.4828 11/30/2022 10711.819 11724.8646 12/31/2022 10584.9216 11560.0696 01/31/2023 11418.8851 12472.8751 02/28/2023 10734.6074 11664.0981 03/31/2023 11066.0544 12017.3761 04/30/2023 10916.3686 11881.1926 05/31/2023 10654.4186 11681.6264 06/30/2023 11124.8595 12125.1623 07/31/2023 11584.6086 12879.9749 08/31/2023 10948.4442 12086.5619 09/30/2023 10520.7706 11770.481 10/31/2023 10066.3674 11313.1508 11/30/2023 10857.5635 12218.5358 12/31/2023 11233.5456 12696.2008 01/31/2024 10766.1605 12106.6826 02/29/2024 11402.0216 12682.6205 03/31/2024 11662.8877 12996.8939 04/30/2024 11548.7588 13055.0442 05/31/2024 11733.5389 13128.7726 06/30/2024 12152.0116 13646.6316 07/31/2024 11842.2331 13687.2298 08/31/2024 11842.2331 13908.2248 09/30/2024 12450.9206 14836.9413
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Developing World Fund Class A (with sales charge) 13.01% 2.20% 2.22% Developing World Fund Class A (without sales charge) 18.35% 3.14% 2.69% MSCI Emerging Markets Net Total Return USD Index 26.05% 5.75% 4.02%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment and assumes the deduction of the maximum sales charge associated with that investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fdw/THDAX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 674,800,000
Holdings Count | Holdings	65
Advisory Fees Paid, Amount	$ 7,200,000
Investment Company, Portfolio Turnover	90.88%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $674.8 Number of Holdings 65 Annual Portfolio Turnover 90.88% Total Advisory Fee $7.2
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 5.7 Mid Cap ($2.5-12 B) 21.7 Large Cap (>$12 B) 72.6 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 5.7% Mid Cap ($2.5-12 B) 21.7% Large Cap (>$12 B) 72.6% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Developing World Fund Class C
Shareholder Report [Line Items]
Class Name	CLASS: C
Trading Symbol	THDCX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Developing World Fund Class C Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $253.00 2.33%
Expenses Paid, Amount	$ 253
Expense Ratio, Percent	2.33%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class C shares underperformed the MSCI Emerging Markets Net Total Return USD Index (the “Index”) during the 12-month period ended September 30, 2024. During the period, emerging market equities have posted strong returns but lagged their developed world counterparts. Much of emerging market underperformance was driven by China, where concerns around the real estate market, a weaker-than-expected recovery from COVID-19, and broadly slower economic growth weighed on sentiment. The Fund’s underperformance was primarily driven by weaker security selection as well as the Fund’s sector and country positioning. The currency effect on the Fund’s performance was modestly positive. Positive contributors included stock selection within the consumer staples, information technology and real estate sectors as well as an underweight allocation to materials. Stock selection in consumer discretionary and industrials hampered relative performance. On a geographic basis, positive stock selection in India and South Korea bolstered relative returns while weaker stock selection in China and Brazil were negative contributors to relative performance.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Developing World Fund MSCI Emerging Markets Net Total Return USD Index 09/30/2014 9999.9969 10000 10/31/2014 10232.9419 10117.8941 11/30/2014 10249.5809 10010.8928 12/31/2014 9739.3204 9549.5193 01/31/2015 9639.4868 9606.7659 02/28/2015 9694.9499 9904.2244 03/31/2015 9517.468 9763.3793 04/30/2015 9938.9875 10514.3152 05/31/2015 9789.2371 10093.2546 06/30/2015 9572.9311 9831.1381 07/31/2015 9168.0504 9149.6497 08/31/2015 8369.3818 8322.0838 09/30/2015 8031.0569 8071.7401 10/31/2015 8435.9375 8647.5115 11/30/2015 8280.6408 8310.1921 12/31/2015 8186.3536 8124.9435 01/31/2016 7836.936 7597.8566 02/29/2016 7726.0098 7585.4179 03/31/2016 8447.0301 8589.171 04/30/2016 8635.6047 8635.8577 05/31/2016 8474.7617 8313.7121 06/30/2016 8552.41 8645.9894 07/31/2016 8924.0128 9081.0822 08/31/2016 9018.3001 9306.7626 09/30/2016 9018.3001 9426.4404 10/31/2016 8929.5591 9448.9157 11/30/2016 8374.9281 9013.9656 12/31/2016 8330.5576 9033.8723 01/31/2017 8596.7805 9528.2332 02/28/2017 8746.5309 9819.9124 03/31/2017 9007.2074 10067.8064 04/30/2017 9306.7082 10288.2068 05/31/2017 9500.829 10592.3722 06/30/2017 9718.7504 10699.0168 07/31/2017 10196.0848 11336.7677 08/31/2017 10351.496 11589.6561 09/30/2017 10520.215 11543.564 10/31/2017 10764.7419 11948.2379 11/30/2017 10942.5797 11972.2115 12/31/2017 11192.664 12401.9769 01/31/2018 12048.5082 13435.6494 02/28/2018 11437.1909 12815.9976 03/31/2018 11098.1877 12577.7121 04/30/2018 10898.1202 12522.0591 05/31/2018 10664.7082 12078.3567 06/30/2018 10320.1475 11576.5277 07/31/2018 10564.6744 11830.8432 08/31/2018 10120.08 11510.9332 09/30/2018 10058.9483 11449.8575 10/31/2018 9247.5635 10452.7639 11/30/2018 9708.8302 10883.5281 12/31/2018 9414.2864 10595.25 01/31/2019 10325.7049 11522.8962 02/28/2019 10509.1001 11548.7963 03/31/2019 10764.7419 11645.7135 04/30/2019 11087.0728 11890.8962 05/31/2019 10364.6069 11028.0596 06/30/2019 11159.3194 11716.3501 07/31/2019 10975.9243 11573.0791 08/31/2019 10603.5764 11008.8189 09/30/2019 10753.6271 11218.9687 10/31/2019 11209.3363 11692.0435 11/30/2019 11248.2383 11675.9422 12/31/2019 12055.947 12547.0316 01/31/2020 11626.9692 11962.1512 02/29/2020 10975.1458 11331.345 03/31/2020 9053.1025 9586.0744 04/30/2020 9933.3426 10463.8945 05/31/2020 10161.7594 10544.2822 06/30/2020 10986.2881 11319.382 07/31/2020 11911.0973 12330.8884 08/31/2020 12289.9348 12603.4695 09/30/2020 12089.3738 12401.3109 10/31/2020 12507.2093 12656.8156 11/30/2020 13671.5776 13827.4089 12/31/2020 14679.9539 14843.9098 01/31/2021 15097.7894 15299.0044 02/28/2021 15415.3444 15416.0186 03/31/2021 14869.3727 15183.1795 04/30/2021 15097.7894 15561.216 05/31/2021 15248.2102 15922.0809 06/30/2021 15476.6269 15949.5269 07/31/2021 14635.3848 14876.1362 08/31/2021 15008.6512 15265.5412 09/30/2021 14445.966 14658.8752 10/31/2021 14579.6734 14803.4543 11/30/2021 13810.8561 14200.1655 12/31/2021 14128.411 14466.6105 01/31/2022 13627.0084 14192.7689 02/28/2022 12991.8985 13768.5451 03/31/2022 12618.6321 13457.5776 04/30/2022 11548.9732 12708.9725 05/31/2022 11833.1014 12764.9348 06/30/2022 10891.5787 11916.7012 07/31/2022 10824.725 11887.4238 08/31/2022 10802.4405 11937.0597 09/30/2022 9571.2185 10537.6467 10/31/2022 9092.1005 10210.4828 11/30/2022 10529.4546 11724.8646 12/31/2022 10398.8231 11560.0696 01/31/2023 11214.1981 12472.8751 02/28/2023 10532.8574 11664.0981 03/31/2023 10851.1887 12017.3761 04/30/2023 10694.8154 11881.1926 05/31/2023 10432.3317 11681.6264 06/30/2023 10884.6972 12125.1623 07/31/2023 11325.8933 12879.9749 08/31/2023 10700.4002 12086.5619 09/30/2023 10275.9584 11770.481 10/31/2023 9823.5928 11313.1508 11/30/2023 10588.705 12218.5358 12/31/2023 10948.0132 12696.2008 01/31/2024 10487.1626 12106.6826 02/29/2024 11094.1366 12682.6205 03/31/2024 11341.4223 12996.8939 04/30/2024 11223.3996 13055.0442 05/31/2024 11397.6236 13128.7726 06/30/2024 11791.0327 13646.6316 07/31/2024 11487.5457 13687.2298 08/31/2024 11470.6853 13908.2248 09/30/2024 12055.1789 14836.9413
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Developing World Fund Class C (with sales charge) 16.31% 2.31% 1.89% Developing World Fund Class C (without sales charge) 17.31% 2.31% 1.89% MSCI Emerging Markets Net Total Return USD Index 26.05% 5.75% 4.02%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fdw/THDCX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 674,800,000
Holdings Count | Holdings	65
Advisory Fees Paid, Amount	$ 7,200,000
Investment Company, Portfolio Turnover	90.88%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $674.8 Number of Holdings 65 Annual Portfolio Turnover 90.88% Total Advisory Fee $7.2
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 5.7 Mid Cap ($2.5-12 B) 21.7 Large Cap (>$12 B) 72.6 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 5.7% Mid Cap ($2.5-12 B) 21.7% Large Cap (>$12 B) 72.6% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Developing World Fund Class I
Shareholder Report [Line Items]
Class Name	CLASS: I
Trading Symbol	THDIX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Developing World Fund Class I Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $114.00 1.04%
Expenses Paid, Amount	$ 114
Expense Ratio, Percent	1.04%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class I shares underperformed the MSCI Emerging Markets Net Total Return USD Index (the “Index”) during the 12-month period ended September 30, 2024. During the period, emerging market equities have posted strong returns but lagged their developed world counterparts. Much of emerging market underperformance was driven by China, where concerns around the real estate market, a weaker-than-expected recovery from COVID-19, and broadly slower economic growth weighed on sentiment. The Fund’s underperformance was primarily driven by weaker security selection as well as the Fund’s sector and country positioning. The currency effect on the Fund’s performance was modestly positive. Positive contributors included stock selection within the consumer staples, information technology and real estate sectors as well as an underweight allocation to materials. Stock selection in consumer discretionary and industrials hampered relative performance. On a geographic basis, positive stock selection in India and South Korea bolstered relative returns while weaker stock selection in China and Brazil were negative contributors to relative performance.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Developing World Fund MSCI Emerging Markets Net Total Return USD Index 09/30/2014 9999.9957 10000 10/31/2014 10243.1246 10117.8941 11/30/2014 10269.5516 10010.8928 12/31/2014 9771.1706 9549.5193 01/31/2015 9675.9969 9606.7659 02/28/2015 9744.7335 9904.2244 03/31/2015 9570.2483 9763.3793 04/30/2015 10003.8176 10514.3152 05/31/2015 9861.0569 10093.2546 06/30/2015 9654.8472 9831.1381 07/31/2015 9253.0025 9149.6497 08/31/2015 8459.888 8322.0838 09/30/2015 8125.0601 8071.7401 10/31/2015 8540.0927 8647.5115 11/30/2015 8396.4275 8310.1921 12/31/2015 8306.2044 8124.9435 01/31/2016 7960.1126 7597.8566 02/29/2016 7858.9472 7585.4179 03/31/2016 8599.0514 8589.171 04/30/2016 8801.382 8635.8577 05/31/2016 8646.9718 8313.7121 06/30/2016 8737.4881 8645.9894 07/31/2016 9120.8514 9081.0822 08/31/2016 9227.3412 9306.7626 09/30/2016 9236.4474 9426.4404 10/31/2016 9156.177 9448.9157 11/30/2016 8594.2842 9013.9656 12/31/2016 8562.176 9033.8723 01/31/2017 8840.4467 9528.2332 02/28/2017 9006.3389 9819.9124 03/31/2017 9281.6014 10067.8064 04/30/2017 9597.5936 10288.2068 05/31/2017 9806.4698 10592.3722 06/30/2017 10044.7536 10699.0168 07/31/2017 10549.9472 11336.7677 08/31/2017 10716.5536 11589.6561 09/30/2017 10904.3257 11543.564 10/31/2017 11168.7057 11948.2379 11/30/2017 11362.9441 11972.2115 12/31/2017 11632.7196 12401.9769 01/31/2018 12533.7697 13435.6494 02/28/2018 11913.2861 12815.9976 03/31/2018 11567.9734 12577.7121 04/30/2018 11373.7351 12522.0591 05/31/2018 11136.3326 12078.3567 06/30/2018 10785.6245 11576.5277 07/31/2018 11050.0045 11830.8432 08/31/2018 10602.1772 11510.9332 09/30/2018 10548.2221 11449.8575 10/31/2018 9706.5225 10452.7639 11/30/2018 10197.5139 10883.5281 12/31/2018 9903.3811 10595.25 01/31/2019 10871.2985 11522.8962 02/28/2019 11073.6315 11548.7963 03/31/2019 11352.523 11645.7135 04/30/2019 11707.9729 11890.8962 05/31/2019 10953.3254 11028.0596 06/30/2019 11806.4051 11716.3501 07/31/2019 11620.4775 11573.0791 08/31/2019 11237.6853 11008.8189 09/30/2019 11407.2076 11218.9687 10/31/2019 11899.369 11692.0435 11/30/2019 11954.0536 11675.9422 12/31/2019 12824.0492 12547.0316 01/31/2020 12369.6101 11962.1512 02/29/2020 11693.4934 11331.345 03/31/2020 9654.0595 9586.0744 04/30/2020 10601.7312 10463.8945 05/31/2020 10856.6605 10544.2822 06/30/2020 11754.4547 11319.382 07/31/2020 12752.0039 12330.8884 08/31/2020 13167.6494 12603.4695 09/30/2020 12968.1396 12401.3109 10/31/2020 13428.1206 12656.8156 11/30/2020 14691.6829 13827.4089 12/31/2020 15790.7742 14843.9098 01/31/2021 16257.0044 15299.0044 02/28/2021 16606.6771 15416.0186 03/31/2021 16034.99 15183.1795 04/30/2021 16301.4073 15561.216 05/31/2021 16473.4685 15922.0809 06/30/2021 16734.3354 15949.5269 07/31/2021 15840.7274 14876.1362 08/31/2021 16257.0044 15265.5412 09/30/2021 15663.1159 14658.8752 10/31/2021 15824.0764 14803.4543 11/30/2021 15002.6231 14200.1655 12/31/2021 15368.9468 14466.6105 01/31/2022 14836.1123 14192.7689 02/28/2022 14153.418 13768.5451 03/31/2022 13764.8928 13457.5776 04/30/2022 12615.9683 12708.9725 05/31/2022 12937.8892 12764.9348 06/30/2022 11922.1733 11916.7012 07/31/2022 11855.569 11887.4238 08/31/2022 11844.4682 11937.0597 09/30/2022 10506.8315 10537.6467 10/31/2022 9990.648 10210.4828 11/30/2022 11583.6013 11724.8646 12/31/2022 11450.5027 11560.0696 01/31/2023 12359.9901 12472.8751 02/28/2023 11619.9724 11664.0981 03/31/2023 11975.8588 12017.3761 04/30/2023 11823.3361 11881.1926 05/31/2023 11546.5356 11681.6264 06/30/2023 12060.5936 12125.1623 07/31/2023 12563.3538 12879.9749 08/31/2023 11879.826 12086.5619 09/30/2023 11416.6088 11770.481 10/31/2023 10925.1467 11313.1508 11/30/2023 11795.0911 12218.5358 12/31/2023 12204.2416 12696.2008 01/31/2024 11702.4604 12106.6826 02/29/2024 12394.5724 12682.6205 03/31/2024 12688.72 12996.8939 04/30/2024 12561.8328 13055.0442 05/31/2024 12775.234 13128.7726 06/30/2024 13230.8744 13646.6316 07/31/2024 12902.1212 13687.2298 08/31/2024 12902.1212 13908.2248 09/30/2024 13576.9304 14836.9413
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Developing World Fund Class I 18.92% 3.54% 3.11% MSCI Emerging Markets Net Total Return USD Index 26.05% 5.75% 4.02%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fdw/THDIX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 674,800,000
Holdings Count | Holdings	65
Advisory Fees Paid, Amount	$ 7,200,000
Investment Company, Portfolio Turnover	90.88%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $674.8 Number of Holdings 65 Annual Portfolio Turnover 90.88% Total Advisory Fee $7.2
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 5.7 Mid Cap ($2.5-12 B) 21.7 Large Cap (>$12 B) 72.6 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 5.7% Mid Cap ($2.5-12 B) 21.7% Large Cap (>$12 B) 72.6% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Developing World Fund Class R5
Shareholder Report [Line Items]
Class Name	CLASS: R5
Trading Symbol	THDRX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Developing World Fund Class R5 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R5 $114.00 1.04%
Expenses Paid, Amount	$ 114
Expense Ratio, Percent	1.04%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R5 shares underperformed the MSCI Emerging Markets Net Total Return USD Index (the “Index”) during the 12-month period ended September 30, 2024. During the period, emerging market equities have posted strong returns but lagged their developed world counterparts. Much of emerging market underperformance was driven by China, where concerns around the real estate market, a weaker-than-expected recovery from COVID-19, and broadly slower economic growth weighed on sentiment. The Fund’s underperformance was primarily driven by weaker security selection as well as the Fund’s sector and country positioning. The currency effect on the Fund’s performance was modestly positive. Positive contributors included stock selection within the consumer staples, information technology and real estate sectors as well as an underweight allocation to materials. Stock selection in consumer discretionary and industrials hampered relative performance. On a geographic basis, positive stock selection in India and South Korea bolstered relative returns while weaker stock selection in China and Brazil were negative contributors to relative performance.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Developing World Fund MSCI Emerging Markets Net Total Return USD Index 09/30/2014 10000.0058 10000 10/31/2014 10243.9084 10117.8941 11/30/2014 10270.4195 10010.8928 12/31/2014 9769.3601 9549.5193 01/31/2015 9673.8941 9606.7659 02/28/2015 9742.8418 9904.2244 03/31/2015 9567.8207 9763.3793 04/30/2015 10008.0253 10514.3152 05/31/2015 9864.8262 10093.2546 06/30/2015 9657.9831 9831.1381 07/31/2015 9254.9042 9149.6497 08/31/2015 8459.3536 8322.0838 09/30/2015 8127.8605 8071.7401 10/31/2015 8544.4 8647.5115 11/30/2015 8400.2132 8310.1921 12/31/2015 8309.8578 8124.9435 01/31/2016 7967.8444 7597.8566 02/29/2016 7860.9652 7585.4179 03/31/2016 8603.7756 8589.171 04/30/2016 8806.8461 8635.8577 05/31/2016 8651.8712 8313.7121 06/30/2016 8737.3746 8645.9894 07/31/2016 9127.4837 9081.0822 08/31/2016 9234.3629 9306.7626 09/30/2016 9237.3632 9426.4404 10/31/2016 9162.1754 9448.9157 11/30/2016 8598.2666 9013.9656 12/31/2016 8566.0432 9033.8723 01/31/2017 8839.9418 9528.2332 02/28/2017 9006.4291 9819.9124 03/31/2017 9282.3832 10067.8064 04/30/2017 9599.5 10288.2068 05/31/2017 9809.1195 10592.3722 06/30/2017 10042.7529 10699.0168 07/31/2017 10549.7447 11336.7677 08/31/2017 10722.3376 11589.6561 09/30/2017 10905.4273 11543.564 10/31/2017 11170.753 11948.2379 11/30/2017 11365.6862 11972.2115 12/31/2017 11636.4267 12401.9769 01/31/2018 12535.2851 13435.6494 02/28/2018 11917.9968 12815.9976 03/31/2018 11571.449 12577.7121 04/30/2018 11376.5158 12522.0591 05/31/2018 11138.2642 12078.3567 06/30/2018 10786.3015 11576.5277 07/31/2018 11051.6272 11830.8432 08/31/2018 10602.198 11510.9332 09/30/2018 10548.0499 11449.8575 10/31/2018 9708.7543 10452.7639 11/30/2018 10201.502 10883.5281 12/31/2018 9904.9375 10595.25 01/31/2019 10870.7375 11522.8962 02/28/2019 11073.775 11548.7963 03/31/2019 11359.125 11645.7135 04/30/2019 11710.325 11890.8962 05/31/2019 10953.05 11028.0596 06/30/2019 11809.1 11716.3501 07/31/2019 11628.0125 11573.0791 08/31/2019 11238.4 11008.8189 09/30/2019 11408.5125 11218.9687 10/31/2019 11902.3875 11692.0435 11/30/2019 11957.2625 11675.9422 12/31/2019 12830.3805 12547.0316 01/31/2020 12374.3375 11962.1512 02/29/2020 11695.8345 11331.345 03/31/2020 9654.764 9586.0744 04/30/2020 10605.7805 10463.8945 05/31/2020 10861.6095 10544.2822 06/30/2020 11757.011 11319.382 07/31/2020 12758.081 12330.8884 08/31/2020 13175.1935 12603.4695 09/30/2020 12974.9795 12401.3109 10/31/2020 13431.0225 12656.8156 11/30/2020 14693.483 13827.4089 12/31/2020 15791.8855 14843.9098 01/31/2021 16259.7933 15299.0044 02/28/2021 16610.7241 15416.0186 03/31/2021 16042.5504 15183.1795 04/30/2021 16304.3559 15561.216 05/31/2021 16477.0361 15922.0809 06/30/2021 16738.8417 15949.5269 07/31/2021 15842.0185 14876.1362 08/31/2021 16265.3636 15265.5412 09/30/2021 15663.768 14658.8752 10/31/2021 15830.8779 14803.4543 11/30/2021 15006.469 14200.1655 12/31/2021 15374.1108 14466.6105 01/31/2022 14839.3591 14192.7689 02/28/2022 14159.7789 13768.5451 03/31/2022 13769.8558 13457.5776 04/30/2022 12616.7975 12708.9725 05/31/2022 12945.4469 12764.9348 06/30/2022 11926.0765 11916.7012 07/31/2022 11859.2326 11887.4238 08/31/2022 11848.0919 11937.0597 09/30/2022 10511.2127 10537.6467 10/31/2022 9993.172 10210.4828 11/30/2022 11586.2864 11724.8646 12/31/2022 11452.491 11560.0696 01/31/2023 12365.2885 12472.8751 02/28/2023 11622.5775 11664.0981 03/31/2023 11979.7592 12017.3761 04/30/2023 11826.6813 11881.1926 05/31/2023 11548.8733 11681.6264 06/30/2023 12064.8024 12125.1623 07/31/2023 12563.7228 12879.9749 08/31/2023 11883.3768 12086.5619 09/30/2023 11424.1432 11770.481 10/31/2023 10930.8924 11313.1508 11/30/2023 11798.3335 12218.5358 12/31/2023 12208.6214 12696.2008 01/31/2024 11704.994 12106.6826 02/29/2024 12399.6524 12682.6205 03/31/2024 12689.0934 12996.8939 04/30/2024 12567.5282 13055.0442 05/31/2024 12775.9257 13128.7726 06/30/2024 13233.2425 13646.6316 07/31/2024 12903.2798 13687.2298 08/31/2024 12909.0686 13908.2248 09/30/2024 13580.5717 14836.9413
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Developing World Fund Class R5 18.88% 3.55% 3.11% MSCI Emerging Markets Net Total Return USD Index 26.05% 5.75% 4.02%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fdw/THDRX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 674,800,000
Holdings Count | Holdings	65
Advisory Fees Paid, Amount	$ 7,200,000
Investment Company, Portfolio Turnover	90.88%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $674.8 Number of Holdings 65 Annual Portfolio Turnover 90.88% Total Advisory Fee $7.2
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 5.7 Mid Cap ($2.5-12 B) 21.7 Large Cap (>$12 B) 72.6 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 5.7% Mid Cap ($2.5-12 B) 21.7% Large Cap (>$12 B) 72.6% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Developing World Fund Class R6
Shareholder Report [Line Items]
Class Name	CLASS: R6
Trading Symbol	TDWRX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Developing World Fund Class R6 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R6 $103.00 0.94%
Expenses Paid, Amount	$ 103
Expense Ratio, Percent	0.94%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R6 shares underperformed the MSCI Emerging Markets Net Total Return USD Index (the “Index”) during the 12-month period ended September 30, 2024. During the period, emerging market equities have posted strong returns but lagged their developed world counterparts. Much of emerging market underperformance was driven by China, where concerns around the real estate market, a weaker-than-expected recovery from COVID-19, and broadly slower economic growth weighed on sentiment. The Fund’s underperformance was primarily driven by weaker security selection as well as the Fund’s sector and country positioning. The currency effect on the Fund’s performance was modestly positive. Positive contributors included stock selection within the consumer staples, information technology and real estate sectors as well as an underweight allocation to materials. Stock selection in consumer discretionary and industrials hampered relative performance. On a geographic basis, positive stock selection in India and South Korea bolstered relative returns while weaker stock selection in China and Brazil were negative contributors to relative performance.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Developing World Fund MSCI Emerging Markets Net Total Return USD Index 09/30/2014 10000.0051 10000 10/31/2014 10248.551 10117.8941 11/30/2014 10274.992 10010.8928 12/31/2014 9772.2923 9549.5193 01/31/2015 9682.347 9606.7659 02/28/2015 9745.8378 9904.2244 03/31/2015 9576.529 9763.3793 04/30/2015 10015.6737 10514.3152 05/31/2015 9867.5285 10093.2546 06/30/2015 9666.4743 9831.1381 07/31/2015 9264.3659 9149.6497 08/31/2015 8465.44 8322.0838 09/30/2015 8131.8032 8071.7401 10/31/2015 8553.0573 8647.5115 11/30/2015 8414.4167 8310.1921 12/31/2015 8325.2832 8124.9435 01/31/2016 7978.3964 7597.8566 02/29/2016 7876.9987 7585.4179 03/31/2016 8613.4661 8589.171 04/30/2016 8816.2614 8635.8577 05/31/2016 8661.4966 8313.7121 06/30/2016 8752.2208 8645.9894 07/31/2016 9141.8014 9081.0822 08/31/2016 9248.5358 9306.7626 09/30/2016 9254.8147 9426.4404 10/31/2016 9179.7032 9448.9157 11/30/2016 8616.3667 9013.9656 12/31/2016 8584.176 9033.8723 01/31/2017 8863.1617 9528.2332 02/28/2017 9029.4801 9819.9124 03/31/2017 9305.4475 10067.8064 04/30/2017 9622.2515 10288.2068 05/31/2017 9837.0339 10592.3722 06/30/2017 10071.6485 10699.0168 07/31/2017 10578.1948 11336.7677 08/31/2017 10750.636 11589.6561 09/30/2017 10935.6512 11543.564 10/31/2017 11206.2017 11948.2379 11/30/2017 11395.5871 11972.2115 12/31/2017 11671.5486 12401.9769 01/31/2018 12575.1872 13435.6494 02/28/2018 11952.9211 12815.9976 03/31/2018 11612.0275 12577.7121 04/30/2018 11411.8201 12522.0591 05/31/2018 11173.7356 12078.3567 06/30/2018 10827.431 11576.5277 07/31/2018 11092.5705 11830.8432 08/31/2018 10643.4567 11510.9332 09/30/2018 10589.3466 11449.8575 10/31/2018 9750.64 10452.7639 11/30/2018 10243.0419 10883.5281 12/31/2018 9941.9372 10595.25 01/31/2019 10919.1127 11522.8962 02/28/2019 11122.2335 11548.7963 03/31/2019 11407.7005 11645.7135 04/30/2019 11759.0445 11890.8962 05/31/2019 11001.459 11028.0596 06/30/2019 11857.86 11716.3501 07/31/2019 11682.188 11573.0791 08/31/2019 11292.4157 11008.8189 09/30/2019 11462.598 11218.9687 10/31/2019 11962.1652 11692.0435 11/30/2019 12017.0627 11675.9422 12/31/2019 12896.4376 12547.0316 01/31/2020 12434.2595 11962.1512 02/29/2020 11754.9135 11331.345 03/31/2020 9705.7386 9586.0744 04/30/2020 10663.5051 10463.8945 05/31/2020 10919.652 10544.2822 06/30/2020 11821.7344 11319.382 07/31/2020 12829.6166 12330.8884 08/31/2020 13247.2474 12603.4695 09/30/2020 13046.7846 12401.3109 10/31/2020 13514.5311 12656.8156 11/30/2020 14784.1285 13827.4089 12/31/2020 15890.1889 14843.9098 01/31/2021 16359.0248 15299.0044 02/28/2021 16716.2331 15416.0186 03/31/2021 16141.351 15183.1795 04/30/2021 16409.2572 15561.216 05/31/2021 16582.28 15922.0809 06/30/2021 16850.1862 15949.5269 07/31/2021 15946.0027 14876.1362 08/31/2021 16370.1875 15265.5412 09/30/2021 15772.9799 14658.8752 10/31/2021 15940.4213 14803.4543 11/30/2021 15114.377 14200.1655 12/31/2021 15482.7481 14466.6105 01/31/2022 14946.9356 14192.7689 02/28/2022 14260.4259 13768.5451 03/31/2022 13869.7293 13457.5776 04/30/2022 12714.3836 12708.9725 05/31/2022 13043.6851 12764.9348 06/30/2022 12016.7111 11916.7012 07/31/2022 11949.7346 11887.4238 08/31/2022 11938.5718 11937.0597 09/30/2022 10593.4592 10537.6467 10/31/2022 10074.3909 10210.4828 11/30/2022 11676.247 11724.8646 12/31/2022 11543.5544 11560.0696 01/31/2023 12464.7642 12472.8751 02/28/2023 11719.8353 11664.0981 03/31/2023 12083.77 12017.3761 04/30/2023 11930.235 11881.1926 05/31/2023 11645.911 11681.6264 06/30/2023 12169.0672 12125.1623 07/31/2023 12675.1639 12879.9749 08/31/2023 11987.0998 12086.5619 09/30/2023 11520.8085 11770.481 10/31/2023 11026.0847 11313.1508 11/30/2023 11901.8026 12218.5358 12/31/2023 12319.6168 12696.2008 01/31/2024 11814.0476 12106.6826 02/29/2024 12517.1956 12682.6205 03/31/2024 12807.7526 12996.8939 04/30/2024 12685.7186 13055.0442 05/31/2024 12900.7308 13128.7726 06/30/2024 13359.8109 13646.6316 07/31/2024 13028.5759 13687.2298 08/31/2024 13034.387 13908.2248 09/30/2024 13714.2904 14836.9413
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Developing World Fund Class R6 19.04% 3.65% 3.21% MSCI Emerging Markets Net Total Return USD Index 26.05% 5.75% 4.02%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fdw/TDWRX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 674,800,000
Holdings Count | Holdings	65
Advisory Fees Paid, Amount	$ 7,200,000
Investment Company, Portfolio Turnover	90.88%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $674.8 Number of Holdings 65 Annual Portfolio Turnover 90.88% Total Advisory Fee $7.2
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 5.7 Mid Cap ($2.5-12 B) 21.7 Large Cap (>$12 B) 72.6 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 5.7% Mid Cap ($2.5-12 B) 21.7% Large Cap (>$12 B) 72.6% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Small/Mid Cap Core Fund - Class A
Shareholder Report [Line Items]
Class Name	CLASS: A
Trading Symbol	TVAFX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Small/Mid Cap Core Fund Class A Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $156.00 1.38%
Expenses Paid, Amount	$ 156
Expense Ratio, Percent	1.38%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class A shares outperformed the Russell 2500 Index – Total Return (the “Index”) during the 12-month period ended September 30, 2024. Stock selection was the primary driver of the Fund’s relative outperformance. The Fund’s stock selection in the industrials and consumer discretionary sectors had a positive impact on performance relative to the Index during the period. Stock selection in and underweight allocations to health care and financials detracted from relative results. Returns of larger mid-cap companies outpaced smaller-cap companies within the Index during the period. Stock selection was a negative contributor to performance within the mid-cap (those ranging from approximately $2.5 - $12 billion market capitalization) and large-cap portions (those over approximately $12 billion market capitalization) of the Fund’s portfolio during the period. However, an overweight positioning in the Fund to larger stocks within the Index’s universe positively impacted the Fund’s performance relative to the Index for the period. Stock selection, as well as an underweight positioning to the smaller-cap segment of the universe, contributed positively to relative performance.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Small/Mid Cap Core Fund Russell 2500 Index - Total Return Russell 3000 Index - Total Return 09/30/2014 9549.2313 10000 10000 10/31/2014 9654.4734 10442.5942 10275.133 11/30/2014 9984.0996 10533.251 10524.1387 12/31/2014 9957.9736 10676.6699 10524.0202 01/31/2015 9773.2356 10457.9285 10231.1204 02/28/2015 10359.2324 11081.4277 10823.5111 03/31/2015 10303.6124 11228.531 10713.4813 04/30/2015 10532.0519 11031.8505 10761.9405 05/31/2015 10722.7491 11268.3263 10910.7933 06/30/2015 10649.2512 11190.0848 10728.2506 07/31/2015 10790.2878 11169.2953 10907.6844 08/31/2015 10228.1281 10507.9662 10249.1933 09/30/2015 9767.2763 10037.8688 9950.534 10/31/2015 10351.2867 10598.8371 10736.4785 11/30/2015 10422.7982 10807.0053 10795.9966 12/31/2015 10297.6531 10366.9084 10574.4045 01/31/2016 9654.0498 9540.2877 9977.7406 02/29/2016 9439.5154 9607.3008 9974.5274 03/31/2016 10041.4036 10407.6184 10676.794 04/30/2016 10073.1865 10561.1175 10742.9652 05/31/2016 10293.6803 10783.7702 10935.16 06/30/2016 10220.1823 10779.4502 10957.6458 07/31/2016 10625.4141 11341.6249 11392.5207 08/31/2016 10655.2105 11432.0677 11421.5817 09/30/2016 10776.3053 11486.8731 11439.536 10/31/2016 10585.0099 11020.6417 11192.0343 11/30/2016 10881.9163 11958.1705 11692.9016 12/31/2016 10977.7089 12190.3391 11921.0671 01/31/2017 11224.8917 12359.5098 12145.4442 02/28/2017 11649.488 12657.2451 12597.1533 03/31/2017 11832.8818 12648.2611 12605.7226 04/30/2017 12173.7549 12745.8521 12739.3407 05/31/2017 12399.0102 12603.3544 12869.7154 06/30/2017 12564.4632 12918.2402 12985.8568 07/31/2017 12777.7581 13052.007 13230.7044 08/31/2017 12863.4747 12943.6937 13256.1965 09/30/2017 13008.9937 13530.7446 13579.4861 10/31/2017 13218.3017 13740.4631 13875.8204 11/30/2017 13511.333 14191.8661 14297.1609 12/31/2017 13538.7538 14239.6269 14440.0596 01/31/2018 14286.2308 14673.9183 15201.2038 02/28/2018 13608.8924 14070.4951 14640.8928 03/31/2018 13298.2786 14205.5593 14346.9915 04/30/2018 13464.6072 14239.2118 14401.5198 05/31/2018 13847.3636 14908.7918 14808.0786 06/30/2018 13849.3676 15016.5214 14904.9227 07/31/2018 14330.318 15307.063 15399.5545 08/31/2018 14554.7615 15963.6244 15940.3524 09/30/2018 14520.6942 15721.7583 15966.738 10/31/2018 13352.3855 14125.6248 14791.0638 11/30/2018 13580.8369 14392.419 15087.3096 12/31/2018 12227.2471 12815.3626 13683.1425 01/31/2019 13375.0618 14290.7738 14857.6224 02/28/2019 13654.9675 14965.7053 15380.151 03/31/2019 13928.8321 14842.4403 15604.728 04/30/2019 14476.5612 15362.5365 16227.8554 05/31/2019 13238.1295 14269.5432 15177.7201 06/30/2019 14138.2579 15281.9079 16243.7537 07/31/2019 14406.0813 15440.8687 16485.2181 08/31/2019 14136.2442 14823.1686 16149.1603 09/30/2019 14460.4515 15085.9475 16432.5919 10/31/2019 14742.3709 15374.7508 16786.3352 11/30/2019 15205.5242 16034.6203 17424.4142 12/31/2019 15756.8681 16373.6882 17927.5233 01/31/2020 15361.2813 16041.2367 17907.9411 02/29/2020 14297.6372 14696.1543 16441.7593 03/31/2020 11613.2982 11507.1307 14180.724 04/30/2020 13143.1696 13181.5316 16058.8224 05/31/2020 13621.5067 14155.1648 16917.6229 06/30/2020 13807.1903 14563.9768 17304.3924 07/31/2020 14564.0528 15144.3075 18286.9924 08/31/2020 15583.2943 15829.9744 19611.7831 09/30/2020 15098.9023 15420.7019 18897.6985 10/31/2020 15365.3179 15699.9633 18489.825 11/30/2020 16858.8599 18257.5481 20739.1715 12/31/2020 17601.5943 19647.3167 21672.1852 01/31/2021 17252.4284 20128.7527 21575.7888 02/28/2021 18588.543 21441.9079 22250.1888 03/31/2021 18745.9704 21794.5653 23047.7 04/30/2021 19740.9923 22665.269 24235.7902 05/31/2021 19440.2656 22712.2061 24346.427 06/30/2021 19567.4185 22980.6608 24946.7819 07/31/2021 19601.7296 22578.1215 25368.648 08/31/2021 20106.3046 23090.6283 26092.107 09/30/2021 19698.608 22364.3813 24921.4084 10/31/2021 20437.3058 23460.9617 26606.7068 11/30/2021 19173.2063 22482.217 26201.7175 12/31/2021 20035.5111 23219.6145 27233.5057 01/31/2022 18569.6315 21286.9299 25631.1915 02/28/2022 19045.4954 21526.6814 24985.5606 03/31/2022 19324.4501 21868.9407 25795.9975 04/30/2022 17716.3583 20005.6498 23481.0071 05/31/2022 17751.9114 20073.1949 23449.5237 06/30/2022 16127.4104 18155.3711 21487.7688 07/31/2022 17388.1763 20033.8601 23503.707 08/31/2022 16690.7896 19501.3551 22626.5647 09/30/2022 15137.3948 17643.8243 20528.4243 10/31/2022 16327.0545 19336.6212 22211.8772 11/30/2022 17139.305 20152.9477 23371.2533 12/31/2022 16118.2473 18954.3524 22002.7861 01/31/2023 17385.0523 20849.5055 23518.1774 02/28/2023 16763.9622 20360.1753 22968.4935 03/31/2023 16186.6493 19596.9612 23582.6516 04/30/2023 16162.0246 19341.298 23833.9098 05/31/2023 15521.7818 19002.1652 23926.6418 06/30/2023 16922.6548 20620.8915 25560.4836 07/31/2023 17393.2606 21646.0933 26476.7444 08/31/2023 17223.6236 20796.218 25965.6445 09/30/2023 16602.5334 19634.7846 24728.7907 10/31/2023 15721.5157 18442.2218 24073.2616 11/30/2023 16941.8074 20102.3781 26318.0536 12/31/2023 18235.9732 22256.8203 27714.0123 01/31/2024 17959.6291 21674.6733 28021.1577 02/29/2024 19119.727 22853.6855 29537.9574 03/31/2024 20121.1323 23796.8771 30490.7763 04/30/2024 19010.2838 22202.6637 29149.1283 05/31/2024 19776.3862 23126.2073 30526.3399 06/30/2024 19480.8896 22779.6538 31471.3556 07/31/2024 20454.9341 24472.081 32056.3767 08/31/2024 20805.1523 24409.1674 32754.2021 09/30/2024 21108.8572 24772.5666 33431.7499 Effective September 30, 2024, the Fund adopted the Russell 3000 Index – Total Return as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Russell 2500 Index—Total Return as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Small/Mid Cap Core Fund Class A (with sales charge) 21.42% 6.87% 7.76% Small/Mid Cap Core Fund Class A (without sales charge) 27.14% 7.86% 8.26% Russell 2500 Index - Total Return 26.17% 10.43% 9.50% Russell 3000 Index - Total Return 35.19% 15.26% 12.83%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment and assumes the deduction of the maximum sales charge associated with that investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fv/TVAFX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 559,800,000
Holdings Count | Holdings	49
Advisory Fees Paid, Amount	$ 4,600,000
Investment Company, Portfolio Turnover	32.79%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $559.8 Number of Holdings 49 Annual Portfolio Turnover 32.79% Total Advisory Fee $4.6
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 9.0 Mid Cap ($2.5-12 B) 52.2 Large Cap (>$12 B) 38.8 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 9.0% Mid Cap ($2.5-12 B) 52.2% Large Cap (>$12 B) 38.8% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Small/Mid Cap Core Fund - Class C
Shareholder Report [Line Items]
Class Name	CLASS: C
Trading Symbol	TVCFX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Small/Mid Cap Core Fund Class C Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $264.00 2.34%
Expenses Paid, Amount	$ 264
Expense Ratio, Percent	2.34%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class C shares underperformed the Russell 2500 Index – Total Return (the “Index”) during the 12-month period ended September 30, 2024. The Fund’s stock selection in the industrials and consumer discretionary sectors had a positive impact on performance relative to the Index during the period. Stock selection in and underweight allocations to health care and financials detracted from relative results. Returns of larger mid-cap companies outpaced smaller-cap companies within the Index during the period. Stock selection was a negative contributor to performance within the mid-cap (those ranging from approximately $2.5 - $12 billion market capitalization) and large-cap portions (those over approximately $12 billion market capitalization) of the Fund’s portfolio during the period. However, an overweight positioning in the Fund to larger stocks within the Index’s universe positively impacted the Fund’s performance relative to the Index for the period. Stock selection, as well as an underweight positioning to the smaller-cap segment of the universe, contributed positively to relative performance.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Small/Mid Cap Core Fund Russell 2500 Index - Total Return Russell 3000 Index - Total Return 09/30/2014 9999.9816 10000 10000 10/31/2014 10102.3173 10442.5942 10275.133 11/30/2014 10442.6949 10533.251 10524.1387 12/31/2014 10407.0998 10676.6699 10524.0202 01/31/2015 10209.1024 10457.9285 10231.1204 02/28/2015 10814.2181 11081.4277 10823.5111 03/31/2015 10749.7021 11228.531 10713.4813 04/30/2015 10981.0698 11031.8505 10761.9405 05/31/2015 11174.6179 11268.3263 10910.7933 06/30/2015 11087.855 11190.0848 10728.2506 07/31/2015 11228.0104 11169.2953 10907.6844 08/31/2015 10638.4676 10507.9662 10249.1933 09/30/2015 10151.2605 10037.8688 9950.534 10/31/2015 10751.9268 10598.8371 10736.4785 11/30/2015 10818.6675 10807.0053 10795.9966 12/31/2015 10682.9614 10366.9084 10574.4045 01/31/2016 10008.8803 9540.2877 9977.7406 02/29/2016 9779.7372 9607.3008 9974.5274 03/31/2016 10395.9764 10407.6184 10676.794 04/30/2016 10422.6727 10561.1175 10742.9652 05/31/2016 10645.1417 10783.7702 10935.16 06/30/2016 10562.8281 10779.4502 10957.6458 07/31/2016 10974.3958 11341.6249 11392.5207 08/31/2016 10998.8674 11432.0677 11421.5817 09/30/2016 11116.7759 11486.8731 11439.536 10/31/2016 10912.1045 11020.6417 11192.0343 11/30/2016 11212.4376 11958.1705 11692.9016 12/31/2016 11303.6499 12190.3391 11921.0671 01/31/2017 11550.5905 12359.5098 12145.4442 02/28/2017 11982.1803 12657.2451 12597.1533 03/31/2017 12162.3802 12648.2611 12605.7226 04/30/2017 12504.9825 12745.8521 12739.3407 05/31/2017 12727.4515 12603.3544 12869.7154 06/30/2017 12889.8539 12918.2402 12985.8568 07/31/2017 13098.9747 13052.007 13230.7044 08/31/2017 13179.0636 12943.6937 13256.1965 09/30/2017 13319.219 13530.7446 13579.4861 10/31/2017 13523.8905 13740.4631 13875.8204 11/30/2017 13815.3249 14191.8661 14297.1609 12/31/2017 13836.7183 14239.6269 14440.0596 01/31/2018 14591.6515 14673.9183 15201.2038 02/28/2018 13890.3231 14070.4951 14640.8928 03/31/2018 13564.2277 14205.5593 14346.9915 04/30/2018 13725.0419 14239.2118 14401.5198 05/31/2018 14106.9755 14908.7918 14808.0786 06/30/2018 14100.2749 15016.5214 14904.9227 07/31/2018 14576.0168 15307.063 15399.5545 08/31/2018 14794.9027 15963.6244 15940.3524 09/30/2018 14747.9986 15721.7583 15966.738 10/31/2018 13550.8265 14125.6248 14791.0638 11/30/2018 13769.7125 14392.419 15087.3096 12/31/2018 12387.1574 12815.3626 13683.1425 01/31/2019 13539.6589 14290.7738 14857.6224 02/28/2019 13814.383 14965.7053 15380.151 03/31/2019 14080.1731 14842.4403 15604.728 04/30/2019 14622.9209 15362.5365 16227.8554 05/31/2019 13363.21 14269.5432 15177.7201 06/30/2019 14261.0891 15281.9079 16243.7537 07/31/2019 14524.6456 15440.8687 16485.2181 08/31/2019 14243.2208 14823.1686 16149.1603 09/30/2019 14562.6156 15085.9475 16432.5919 10/31/2019 14835.1063 15374.7508 16786.3352 11/30/2019 15290.7464 16034.6203 17424.4142 12/31/2019 15833.4942 16373.6882 17927.5233 01/31/2020 15431.4588 16041.2367 17907.9411 02/29/2020 14352.6638 14696.1543 16441.7593 03/31/2020 11647.859 11507.1307 14180.724 04/30/2020 13175.5935 13181.5316 16058.8224 05/31/2020 13644.6348 14155.1648 16917.6229 06/30/2020 13821.0836 14563.9768 17304.3924 07/31/2020 14569.3162 15144.3075 18286.9924 08/31/2020 15578.8718 15829.9744 19611.7831 09/30/2020 15085.2616 15420.7019 18897.6985 10/31/2020 15339.884 15699.9633 18489.825 11/30/2020 16820.7144 18257.5481 20739.1715 12/31/2020 17548.8452 19647.3167 21672.1852 01/31/2021 17187.0133 20128.7527 21575.7888 02/28/2021 18507.0296 21441.9079 22250.1888 03/31/2021 18652.209 21794.5653 23047.7 04/30/2021 19628.2616 22665.269 24235.7902 05/31/2021 19317.801 22712.2061 24346.427 06/30/2021 19431.711 22980.6608 24946.7819 07/31/2021 19451.8128 22578.1215 25368.648 08/31/2021 19936.4888 23090.6283 26092.107 09/30/2021 19521.0522 22364.3813 24921.4084 10/31/2021 20238.0153 23460.9617 26606.7068 11/30/2021 18973.6269 22482.217 26201.7175 12/31/2021 19812.7786 23219.6145 27233.5057 01/31/2022 18345.0489 21286.9299 25631.1915 02/28/2022 18803.9109 21526.6814 24985.5606 03/31/2022 19064.7707 21868.9407 25795.9975 04/30/2022 17461.8968 20005.6498 23481.0071 05/31/2022 17483.8971 20073.1949 23449.5237 06/30/2022 15871.5945 18155.3711 21487.7688 07/31/2022 17100.4645 20033.8601 23503.707 08/31/2022 16399.6 19501.3551 22626.5647 09/30/2022 14862.7268 17643.8243 20528.4243 10/31/2022 16019.3103 19336.6212 22211.8772 11/30/2022 16798.7471 20152.9477 23371.2533 12/31/2022 15786.7365 18954.3524 22002.7861 01/31/2023 17012.4636 20849.5055 23518.1774 02/28/2023 16393.3142 20360.1753 22968.4935 03/31/2023 15815.0225 19596.9612 23582.6516 04/30/2023 15780.4507 19341.298 23833.9098 05/31/2023 15142.444 19002.1652 23926.6418 06/30/2023 16493.8867 20620.8915 25560.4836 07/31/2023 16940.1771 21646.0933 26476.7444 08/31/2023 16761.0324 20796.218 25965.6445 09/30/2023 16141.883 19634.7846 24728.7907 10/31/2023 15274.4454 18442.2218 24073.2616 11/30/2023 16446.7434 20102.3781 26318.0536 12/31/2023 17688.1849 22256.8203 27714.0123 01/31/2024 17405.3248 21674.6733 28021.1577 02/29/2024 18514.765 22853.6855 29537.9574 03/31/2024 19463.9178 23796.8771 30490.7763 04/30/2024 18376.4778 22202.6637 29149.1283 05/31/2024 19102.4854 23126.2073 30526.3399 06/30/2024 18800.768 22779.6538 31471.3556 07/31/2024 19724.7776 24472.081 32056.3767 08/31/2024 20048.4953 24409.1674 32754.2021 09/30/2024 20321.9267 24772.5666 33431.7499 Effective September 30, 2024, the Fund adopted the Russell 3000 Index – Total Return as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Russell 2500 Index—Total Return as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Small/Mid Cap Core Fund Class C (with sales charge) 24.90% 6.89% 7.35% Small/Mid Cap Core Fund Class C (without sales charge) 25.90% 6.89% 7.35% Russell 2500 Index - Total Return 26.17% 10.43% 9.50% Russell 3000 Index - Total Return 35.19% 15.26% 12.83%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fv/TVCFX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 559,800,000
Holdings Count | Holdings	49
Advisory Fees Paid, Amount	$ 4,600,000
Investment Company, Portfolio Turnover	32.79%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $559.8 Number of Holdings 49 Annual Portfolio Turnover 32.79% Total Advisory Fee $4.6
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 9.0 Mid Cap ($2.5-12 B) 52.2 Large Cap (>$12 B) 38.8 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 9.0% Mid Cap ($2.5-12 B) 52.2% Large Cap (>$12 B) 38.8% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Small/Mid Cap Core Fund - Class I
Shareholder Report [Line Items]
Class Name	CLASS: I
Trading Symbol	TVIFX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Small/Mid Cap Core Fund Class I Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $108.00 0.95%
Expenses Paid, Amount	$ 108
Expense Ratio, Percent	0.95%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class I shares outperformed the Russell 2500 Index – Total Return (the “Index”) during the 12-month period ended September 30, 2024. Stock selection was the primary driver of the Fund’s relative outperformance. The Fund’s stock selection in the industrials and consumer discretionary sectors had a positive impact on performance relative to the Index during the period. Stock selection in and underweight allocations to health care and financials detracted from relative results. Returns of larger mid-cap companies outpaced smaller-cap companies within the Index during the period. Stock selection was a negative contributor to performance within the mid-cap (those ranging from approximately $2.5 - $12 billion market capitalization) and large-cap portions (those over approximately $12 billion market capitalization) of the Fund’s portfolio during the period. However, an overweight positioning in the Fund to larger stocks within the Index’s universe positively impacted the Fund’s performance relative to the Index for the period. Stock selection, as well as an underweight positioning to the smaller-cap segment of the universe, contributed positively to relative performance.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Small/Mid Cap Core Fund Russell 2500 Index - Total Return Russell 3000 Index - Total Return 09/30/2014 9999.9962 10000 10000 10/31/2014 10113.6325 10442.5942 10275.133 11/30/2014 10462.6583 10533.251 10524.1387 12/31/2014 10437.6134 10676.6699 10524.0202 01/31/2015 10248.6514 10457.9285 10231.1204 02/28/2015 10864.302 11081.4277 10823.5111 03/31/2015 10809.442 11228.531 10713.4813 04/30/2015 11053.264 11031.8505 10761.9405 05/31/2015 11258.4808 11268.3263 10910.7933 06/30/2015 11182.096 11190.0848 10728.2506 07/31/2015 11334.496 11169.2953 10907.6844 08/31/2015 10749.28 10507.9662 10249.1933 09/30/2015 10267.696 10037.8688 9950.534 10/31/2015 10885.424 10598.8371 10736.4785 11/30/2015 10964.672 10807.0053 10795.9966 12/31/2015 10836.656 10366.9084 10574.4045 01/31/2016 10164.064 9540.2877 9977.7406 02/29/2016 9940.544 9607.3008 9974.5274 03/31/2016 10576.56 10407.6184 10676.794 04/30/2016 10613.136 10561.1175 10742.9652 05/31/2016 10850.88 10783.7702 10935.16 06/30/2016 10775.696 10779.4502 10957.6458 07/31/2016 11208.512 11341.6249 11392.5207 08/31/2016 11243.056 11432.0677 11421.5817 09/30/2016 11373.2242 11486.8731 11439.536 10/31/2016 11174.7351 11020.6417 11192.0343 11/30/2016 11491.9085 11958.1705 11692.9016 12/31/2016 11598.4154 12190.3391 11921.0671 01/31/2017 11864.8101 12359.5098 12145.4442 02/28/2017 12315.6319 12657.2451 12597.1533 03/31/2017 12514.4033 12648.2611 12605.7226 04/30/2017 12879.1592 12745.8521 12739.3407 05/31/2017 13120.9636 12603.3544 12869.7154 06/30/2017 13300.0056 12918.2402 12985.8568 07/31/2017 13529.8822 13052.007 13230.7044 08/31/2017 13626.3483 12943.6937 13256.1965 09/30/2017 13784.6214 13530.7446 13579.4861 10/31/2017 14010.5988 13740.4631 13875.8204 11/30/2017 14324.9128 14191.8661 14297.1609 12/31/2017 14360.0569 14239.6269 14440.0596 01/31/2018 15157.8379 14673.9183 15201.2038 02/28/2018 14442.7285 14070.4951 14640.8928 03/31/2018 14116.1757 14205.5593 14346.9915 04/30/2018 14295.9864 14239.2118 14401.5198 05/31/2018 14707.2776 14908.7918 14808.0786 06/30/2018 14713.478 15016.5214 14904.9227 07/31/2018 15228.1087 15307.063 15399.5545 08/31/2018 15471.9899 15963.6244 15940.3524 09/30/2018 15438.9213 15721.7583 15966.738 10/31/2018 14200.9141 14125.6248 14791.0638 11/30/2018 14446.8621 14392.419 15087.3096 12/31/2018 13011.1223 12815.3626 13683.1425 01/31/2019 14236.385 14290.7738 14857.6224 02/28/2019 14540.6168 14965.7053 15380.151 03/31/2019 14836.5136 14842.4403 15604.728 04/30/2019 15422.0558 15362.5365 16227.8554 05/31/2019 14109.2744 14269.5432 15177.7201 06/30/2019 15071.9807 15281.9079 16243.7537 07/31/2019 15361.6262 15440.8687 16485.2181 08/31/2019 15078.2321 14823.1686 16149.1603 09/30/2019 15428.3071 15085.9475 16432.5919 10/31/2019 15732.539 15374.7508 16786.3352 11/30/2019 16230.5624 16034.6203 17424.4142 12/31/2019 16824.3025 16373.6882 17927.5233 01/31/2020 16405.3185 16041.2367 17907.9411 02/29/2020 15274.0617 14696.1543 16441.7593 03/31/2020 12410.3061 11507.1307 14180.724 04/30/2020 14050.6284 13181.5316 16058.8224 05/31/2020 14565.9788 14155.1648 16917.6229 06/30/2020 14767.0911 14563.9768 17304.3924 07/31/2020 15582.015 15144.3075 18286.9924 08/31/2020 16677.6581 15829.9744 19611.7831 09/30/2020 16164.4027 15420.7019 18897.6985 10/31/2020 16455.5966 15699.9633 18489.825 11/30/2020 18060.3053 18257.5481 20739.1715 12/31/2020 18860.5648 19647.3167 21672.1852 01/31/2021 18489.7639 20128.7527 21575.7888 02/28/2021 19926.879 21441.9079 22250.1888 03/31/2021 20102.8523 21794.5653 23047.7 04/30/2021 21173.3564 22665.269 24235.7902 05/31/2021 20857.0235 22712.2061 24346.427 06/30/2021 20997.3832 22980.6608 24946.7819 07/31/2021 21041.3765 22578.1215 25368.648 08/31/2021 21588.1506 23090.6283 26092.107 09/30/2021 21156.5971 22364.3813 24921.4084 10/31/2021 21954.7616 23460.9617 26606.7068 11/30/2021 20600.735 22482.217 26201.7175 12/31/2021 21534.5645 23219.6145 27233.5057 01/31/2022 19967.0328 21286.9299 25631.1915 02/28/2022 20484.853 21526.6814 24985.5606 03/31/2022 20794.4194 21868.9407 25795.9975 04/30/2022 19069.2902 20005.6498 23481.0071 05/31/2022 19114.3181 20073.1949 23449.5237 06/30/2022 17372.3035 18155.3711 21487.7688 07/31/2022 18740.0242 20033.8601 23503.707 08/31/2022 17991.4363 19501.3551 22626.5647 09/30/2022 16325.4062 17643.8243 20528.4243 10/31/2022 17614.3282 19336.6212 22211.8772 11/30/2022 18495.1853 20152.9477 23371.2533 12/31/2022 17402.0394 18954.3524 22002.7861 01/31/2023 18773.9492 20849.5055 23518.1774 02/28/2023 18109.2094 20360.1753 22968.4935 03/31/2023 17492.5571 19596.9612 23582.6516 04/30/2023 17472.7564 19341.298 23833.9098 05/31/2023 16785.3871 19002.1652 23926.6418 06/30/2023 18307.217 20620.8915 25560.4836 07/31/2023 18822.0367 21646.0933 26476.7444 08/31/2023 18646.6586 20796.218 25965.6445 09/30/2023 17979.0901 19634.7846 24728.7907 10/31/2023 17031.4823 18442.2218 24073.2616 11/30/2023 18360.9619 20102.3781 26318.0536 12/31/2023 19769.6445 22256.8203 27714.0123 01/31/2024 19478.2905 21674.6733 28021.1577 02/29/2024 20739.8818 22853.6855 29537.9574 03/31/2024 21834.5809 23796.8771 30490.7763 04/30/2024 20638.0493 22202.6637 29149.1283 05/31/2024 21478.1672 23126.2073 30526.3399 06/30/2024 21164.1838 22779.6538 31471.3556 07/31/2024 22230.5961 24472.081 32056.3767 08/31/2024 22620.954 24409.1674 32754.2021 09/30/2024 22957.5669 24772.5666 33431.7499 Effective September 30, 2024, the Fund adopted the Russell 3000 Index – Total Return as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Russell 2500 Index—Total Return as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Small/Mid Cap Core Fund Class I 27.69% 8.27% 8.67% Russell 2500 Index - Total Return 26.17% 10.43% 9.50% Russell 3000 Index - Total Return 35.19% 15.26% 12.83%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fv/TVIFX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 559,800,000
Holdings Count | Holdings	49
Advisory Fees Paid, Amount	$ 4,600,000
Investment Company, Portfolio Turnover	32.79%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $559.8 Number of Holdings 49 Annual Portfolio Turnover 32.79% Total Advisory Fee $4.6
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 9.0 Mid Cap ($2.5-12 B) 52.2 Large Cap (>$12 B) 38.8 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 9.0% Mid Cap ($2.5-12 B) 52.2% Large Cap (>$12 B) 38.8% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Small/Mid Cap Core Fund - Class R3
Shareholder Report [Line Items]
Class Name	CLASS: R3
Trading Symbol	TVRFX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Small/Mid Cap Core Fund Class R3 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R3 $149.00 1.31%
Expenses Paid, Amount	$ 149
Expense Ratio, Percent	1.31%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R3 shares outperformed the Russell 2500 Index – Total Return (the “Index”) during the 12-month period ended September 30, 2024. Stock selection was the primary driver of the Fund’s relative outperformance. The Fund’s stock selection in the industrials and consumer discretionary sectors had a positive impact on performance relative to the Index during the period. Stock selection in and underweight allocations to health care and financials detracted from relative results. Returns of larger mid-cap companies outpaced smaller-cap companies within the Index during the period. Stock selection was a negative contributor to performance within the mid-cap (those ranging from approximately $2.5 - $12 billion market capitalization) and large-cap portions (those over approximately $12 billion market capitalization) of the Fund’s portfolio during the period. However, an overweight positioning in the Fund to larger stocks within the Index’s universe positively impacted the Fund’s performance relative to the Index for the period. Stock selection, as well as an underweight positioning to the smaller-cap segment of the universe, contributed positively to relative performance.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Small/Mid Cap Core Fund Russell 2500 Index - Total Return Russell 3000 Index - Total Return 09/30/2014 10000.0097 10000 10000 10/31/2014 10108.8192 10442.5942 10275.133 11/30/2014 10456.1725 10533.251 10524.1387 12/31/2014 10427.2254 10676.6699 10524.0202 01/31/2015 10234.6326 10457.9285 10231.1204 02/28/2015 10847.9988 11081.4277 10823.5111 03/31/2015 10789.3836 11228.531 10713.4813 04/30/2015 11030.1246 11031.8505 10761.9405 05/31/2015 11228.9976 11268.3263 10910.7933 06/30/2015 11151.5418 11190.0848 10728.2506 07/31/2015 11300.1732 11169.2953 10907.6844 08/31/2015 10711.9278 10507.9662 10249.1933 09/30/2015 10228.3524 10037.8688 9950.534 10/31/2015 10841.7186 10598.8371 10736.4785 11/30/2015 10917.081 10807.0053 10795.9966 12/31/2015 10787.2902 10366.9084 10574.4045 01/31/2016 10113.2154 9540.2877 9977.7406 02/29/2016 9889.2216 9607.3008 9974.5274 03/31/2016 10519.335 10407.6184 10676.794 04/30/2016 10552.8294 10561.1175 10742.9652 05/31/2016 10785.1968 10783.7702 10935.16 06/30/2016 10707.741 10779.4502 10957.6458 07/31/2016 11132.7012 11341.6249 11392.5207 08/31/2016 11164.1022 11432.0677 11421.5817 09/30/2016 11292.288 11486.8731 11439.536 10/31/2016 11090.64 11020.6417 11192.0343 11/30/2016 11403.6145 11958.1705 11692.9016 12/31/2016 11504.4321 12190.3391 11921.0671 01/31/2017 11765.0367 12359.5098 12145.4442 02/28/2017 12208.4849 12657.2451 12597.1533 03/31/2017 12401.8367 12648.2611 12605.7226 04/30/2017 12759.1172 12745.8521 12739.3407 05/31/2017 12994.502 12603.3544 12869.7154 06/30/2017 13168.9389 12918.2402 12985.8568 07/31/2017 13391.7138 13052.007 13230.7044 08/31/2017 13482.0848 12943.6937 13256.1965 09/30/2017 13635.9594 13530.7446 13579.4861 10/31/2017 13854.5382 13740.4631 13875.8204 11/30/2017 14161.3894 14191.8661 14297.1609 12/31/2017 14191.1095 14239.6269 14440.0596 01/31/2018 14975.0436 14673.9183 15201.2038 02/28/2018 14265.0655 14070.4951 14640.8928 03/31/2018 13939.6589 14205.5593 14346.9915 04/30/2018 14112.9274 14239.2118 14401.5198 05/31/2018 14514.4031 14908.7918 14808.0786 06/30/2018 14514.4031 15016.5214 14904.9227 07/31/2018 15017.3042 15307.063 15399.5545 08/31/2018 15253.9636 15963.6244 15940.3524 09/30/2018 15218.0421 15721.7583 15966.738 10/31/2018 13992.4847 14125.6248 14791.0638 11/30/2018 14231.2571 14392.419 15087.3096 12/31/2018 12811.8736 12815.3626 13683.1425 01/31/2019 14014.3786 14290.7738 14857.6224 02/28/2019 14309.1725 14965.7053 15380.151 03/31/2019 14595.4832 14842.4403 15604.728 04/30/2019 15170.2255 15362.5365 16227.8554 05/31/2019 13872.2836 14269.5432 15177.7201 06/30/2019 14813.9277 15281.9079 16243.7537 07/31/2019 15095.9968 15440.8687 16485.2181 08/31/2019 14811.8069 14823.1686 16149.1603 09/30/2019 15153.2589 15085.9475 16432.5919 10/31/2019 15445.9321 15374.7508 16786.3352 11/30/2019 15929.479 16034.6203 17424.4142 12/31/2019 16508.9967 16373.6882 17927.5233 01/31/2020 16094.6782 16041.2367 17907.9411 02/29/2020 14979.2055 14696.1543 16441.7593 03/31/2020 12166.0895 11507.1307 14180.724 04/30/2020 13770.2455 13181.5316 16058.8224 05/31/2020 14271.6771 14155.1648 16917.6229 06/30/2020 14465.0257 14563.9768 17304.3924 07/31/2020 15259.6672 15144.3075 18286.9924 08/31/2020 16328.3964 15829.9744 19611.7831 09/30/2020 15820.5907 15420.7019 18897.6985 10/31/2020 16098.9277 15699.9633 18489.825 11/30/2020 17662.7142 18257.5481 20739.1715 12/31/2020 18440.3581 19647.3167 21672.1852 01/31/2021 18072.7833 20128.7527 21575.7888 02/28/2021 19472.9672 21441.9079 22250.1888 03/31/2021 19638.6945 21794.5653 23047.7 04/30/2021 20677.6777 22665.269 24235.7902 05/31/2021 20363.2206 22712.2061 24346.427 06/30/2021 20494.9527 22980.6608 24946.7819 07/31/2021 20531.0727 22578.1215 25368.648 08/31/2021 21058.0008 23090.6283 26092.107 09/30/2021 20630.9341 22364.3813 24921.4084 10/31/2021 21402.2038 23460.9617 26606.7068 11/30/2021 20077.4529 22482.217 26201.7175 12/31/2021 20982.1542 23219.6145 27233.5057 01/31/2022 19445.7498 21286.9299 25631.1915 02/28/2022 19947.3152 21526.6814 24985.5606 03/31/2022 20241.3363 21868.9407 25795.9975 04/30/2022 18557.9213 20005.6498 23481.0071 05/31/2022 18595.3946 20073.1949 23449.5237 06/30/2022 16894.6842 18155.3711 21487.7688 07/31/2022 18217.7792 20033.8601 23503.707 08/31/2022 17488.4915 19501.3551 22626.5647 09/30/2022 15862.7277 17643.8243 20528.4243 10/31/2022 17110.8762 19336.6212 22211.8772 11/30/2022 17961.2314 20152.9477 23371.2533 12/31/2022 16893.4732 18954.3524 22002.7861 01/31/2023 18220.9412 20849.5055 23518.1774 02/28/2023 17568.7504 20360.1753 22968.4935 03/31/2023 16965.6182 19596.9612 23582.6516 04/30/2023 16942.5318 19341.298 23833.9098 05/31/2023 16270.1404 19002.1652 23926.6418 06/30/2023 17739.0126 20620.8915 25560.4836 07/31/2023 18235.3702 21646.0933 26476.7444 08/31/2023 18059.3364 20796.218 25965.6445 09/30/2023 17407.1456 19634.7846 24728.7907 10/31/2023 16483.6896 18442.2218 24073.2616 11/30/2023 17764.9848 20102.3781 26318.0536 12/31/2023 19121.3108 22256.8203 27714.0123 01/31/2024 18835.6166 21674.6733 28021.1577 02/29/2024 20050.5384 22853.6855 29537.9574 03/31/2024 21100.9696 23796.8771 30490.7763 04/30/2024 19940.878 22202.6637 29149.1283 05/31/2024 20743.1304 23126.2073 30526.3399 06/30/2024 20434.3498 22779.6538 31471.3556 07/31/2024 21458.8088 24472.081 32056.3767 08/31/2024 21828.1912 24409.1674 32754.2021 09/30/2024 22145.6292 24772.5666 33431.7499 Effective September 30, 2024, the Fund adopted the Russell 3000 Index – Total Return as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Russell 2500 Index—Total Return as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Small/Mid Cap Core Fund Class R3 27.22% 7.88% 8.28% Russell 2500 Index - Total Return 26.17% 10.43% 9.50% Russell 3000 Index - Total Return 35.19% 15.26% 12.83%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fv/TVRFX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 559,800,000
Holdings Count | Holdings	49
Advisory Fees Paid, Amount	$ 4,600,000
Investment Company, Portfolio Turnover	32.79%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $559.8 Number of Holdings 49 Annual Portfolio Turnover 32.79% Total Advisory Fee $4.6
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 9.0 Mid Cap ($2.5-12 B) 52.2 Large Cap (>$12 B) 38.8 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 9.0% Mid Cap ($2.5-12 B) 52.2% Large Cap (>$12 B) 38.8% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Small/Mid Cap Core Fund - Class R4
Shareholder Report [Line Items]
Class Name	CLASS: R4
Trading Symbol	TVIRX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Small/Mid Cap Core Fund Class R4 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R4 $138.00 1.21%
Expenses Paid, Amount	$ 138
Expense Ratio, Percent	1.21%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R4 shares outperformed the Russell 2500 Index – Total Return (the “Index”) during the 12-month period ended September 30, 2024. Stock selection was the primary driver of the Fund’s relative outperformance. The Fund’s stock selection in the industrials and consumer discretionary sectors had a positive impact on performance relative to the Index during the period. Stock selection in and underweight allocations to health care and financials detracted from relative results. Returns of larger mid-cap companies outpaced smaller-cap companies within the Index during the period. Stock selection was a negative contributor to performance within the mid-cap (those ranging from approximately $2.5 - $12 billion market capitalization) and large-cap portions (those over approximately $12 billion market capitalization) of the Fund’s portfolio during the period. However, an overweight positioning in the Fund to larger stocks within the Index’s universe positively impacted the Fund’s performance relative to the Index for the period. Stock selection, as well as an underweight positioning to the smaller-cap segment of the universe, contributed positively to relative performance.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Small/Mid Cap Core Fund Russell 2500 Index - Total Return Russell 3000 Index - Total Return 09/30/2014 10000.0073 10000 10000 10/31/2014 10109.8747 10442.5942 10275.133 11/30/2014 10456.0607 10533.251 10524.1387 12/31/2014 10429.9826 10676.6699 10524.0202 01/31/2015 10239.1397 10457.9285 10231.1204 02/28/2015 10851.0818 11081.4277 10823.5111 03/31/2015 10795.0735 11228.531 10713.4813 04/30/2015 11035.7016 11031.8505 10761.9405 05/31/2015 11236.9165 11268.3263 10910.7933 06/30/2015 11160.1644 11190.0848 10728.2506 07/31/2015 11309.5198 11169.2953 10907.6844 08/31/2015 10722.4702 10507.9662 10249.1933 09/30/2015 10239.1397 10037.8688 9950.534 10/31/2015 10853.1562 10598.8371 10736.4785 11/30/2015 10929.9082 10807.0053 10795.9966 12/31/2015 10801.2967 10366.9084 10574.4045 01/31/2016 10127.1232 9540.2877 9977.7406 02/29/2016 9903.0901 9607.3008 9974.5274 03/31/2016 10533.7016 10407.6184 10676.794 04/30/2016 10568.9661 10561.1175 10742.9652 05/31/2016 10803.371 10783.7702 10935.16 06/30/2016 10726.619 10779.4502 10957.6458 07/31/2016 11153.9413 11341.6249 11392.5207 08/31/2016 11187.1313 11432.0677 11421.5817 09/30/2016 11314.2937 11486.8731 11439.536 10/31/2016 11114.2988 11020.6417 11192.0343 11/30/2016 11426.7908 11958.1705 11692.9016 12/31/2016 11529.7735 12190.3391 11921.0671 01/31/2017 11792.4772 12359.5098 12145.4442 02/28/2017 12238.6565 12657.2451 12597.1533 03/31/2017 12432.5569 12648.2611 12605.7226 04/30/2017 12793.2532 12745.8521 12739.3407 05/31/2017 13028.8525 12603.3544 12869.7154 06/30/2017 13205.1365 12918.2402 12985.8568 07/31/2017 13430.4018 13052.007 13230.7044 08/31/2017 13522.1766 12943.6937 13256.1965 09/30/2017 13676.0898 13530.7446 13579.4861 10/31/2017 13897.244 13740.4631 13875.8204 11/30/2017 14206.0252 14191.8661 14297.1609 12/31/2017 14238.1079 14239.6269 14440.0596 01/31/2018 15026.8996 14673.9183 15201.2038 02/28/2018 14313.6305 14070.4951 14640.8928 03/31/2018 13988.4638 14205.5593 14346.9915 04/30/2018 14164.6832 14239.2118 14401.5198 05/31/2018 14567.4704 14908.7918 14808.0786 06/30/2018 14569.5682 15016.5214 14904.9227 07/31/2018 15077.2479 15307.063 15399.5545 08/31/2018 15314.305 15963.6244 15940.3524 09/30/2018 15278.6416 15721.7583 15966.738 10/31/2018 14051.3993 14125.6248 14791.0638 11/30/2018 14290.5542 14392.419 15087.3096 12/31/2018 12867.9358 12815.3626 13683.1425 01/31/2019 14075.6881 14290.7738 14857.6224 02/28/2019 14372.8836 14965.7053 15380.151 03/31/2019 14661.6481 14842.4403 15604.728 04/30/2019 15239.1771 15362.5365 16227.8554 05/31/2019 13936.5752 14269.5432 15177.7201 06/30/2019 14885.0717 15281.9079 16243.7537 07/31/2019 15169.6207 15440.8687 16485.2181 08/31/2019 14885.0717 14823.1686 16149.1603 09/30/2019 15228.6382 15085.9475 16432.5919 10/31/2019 15525.8338 15374.7508 16786.3352 11/30/2019 16012.7287 16034.6203 17424.4142 12/31/2019 16596.8443 16373.6882 17927.5233 01/31/2020 16180.4966 16041.2367 17907.9411 02/29/2020 15060.3734 14696.1543 16441.7593 03/31/2020 12232.5907 11507.1307 14180.724 04/30/2020 13847.2589 13181.5316 16058.8224 05/31/2020 14352.371 14155.1648 16917.6229 06/30/2020 14548.921 14563.9768 17304.3924 07/31/2020 15347.8013 15144.3075 18286.9924 08/31/2020 16423.5422 15829.9744 19611.7831 09/30/2020 15914.2032 15420.7019 18897.6985 10/31/2020 16195.2907 15699.9633 18489.825 11/30/2020 17771.917 18257.5481 20739.1715 12/31/2020 18556.0032 19647.3167 21672.1852 01/31/2021 18188.2646 20128.7527 21575.7888 02/28/2021 19597.9291 21441.9079 22250.1888 03/31/2021 19764.8909 21794.5653 23047.7 04/30/2021 20813.1571 22665.269 24235.7902 05/31/2021 20498.2546 22712.2061 24346.427 06/30/2021 20633.5147 22980.6608 24946.7819 07/31/2021 20669.4432 22578.1215 25368.648 08/31/2021 21202.0301 23090.6283 26092.107 09/30/2021 20775.1152 22364.3813 24921.4084 10/31/2021 21554.9746 23460.9617 26606.7068 11/30/2021 20222.8308 22482.217 26201.7175 12/31/2021 21134.5877 23219.6145 27233.5057 01/31/2022 19588.6424 21286.9299 25631.1915 02/28/2022 20094.4322 21526.6814 24985.5606 03/31/2022 20391.6195 21868.9407 25795.9975 04/30/2022 18697.0805 20005.6498 23481.0071 05/31/2022 18737.0865 20073.1949 23449.5237 06/30/2022 17025.4021 18155.3711 21487.7688 07/31/2022 18362.7448 20033.8601 23503.707 08/31/2022 17625.4918 19501.3551 22626.5647 09/30/2022 15990.9617 17643.8243 20528.4243 10/31/2022 17248.2925 19336.6212 22211.8772 11/30/2022 18108.4211 20152.9477 23371.2533 12/31/2022 17030.2359 18954.3524 22002.7861 01/31/2023 18373.5223 20849.5055 23518.1774 02/28/2023 17717.6319 20360.1753 22968.4935 03/31/2023 17107.5679 19596.9612 23582.6516 04/30/2023 17087.5189 19341.298 23833.9098 05/31/2023 16411.5795 19002.1652 23926.6418 06/30/2023 17895.2092 20620.8915 25560.4836 07/31/2023 18396.4354 21646.0933 26476.7444 08/31/2023 18218.8581 20796.218 25965.6445 09/30/2023 17562.9678 19634.7846 24728.7907 10/31/2023 16634.9832 18442.2218 24073.2616 11/30/2023 17926.7149 20102.3781 26318.0536 12/31/2023 19298.6427 22256.8203 27714.0123 01/31/2024 19009.3635 21674.6733 28021.1577 02/29/2024 20238.0839 22853.6855 29537.9574 03/31/2024 21300.6835 23796.8771 30490.7763 04/30/2024 20132.1103 22202.6637 29149.1283 05/31/2024 20945.529 23126.2073 30526.3399 06/30/2024 20633.3366 22779.6538 31471.3556 07/31/2024 21670.1589 24472.081 32056.3767 08/31/2024 22045.3625 24409.1674 32754.2021 09/30/2024 22369.0115 24772.5666 33431.7499 Effective September 30, 2024, the Fund adopted the Russell 3000 Index – Total Return as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Russell 2500 Index—Total Return as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Small/Mid Cap Core Fund Class R4 27.36% 7.99% 8.38% Russell 2500 Index - Total Return 26.17% 10.43% 9.50% Russell 3000 Index - Total Return 35.19% 15.26% 12.83%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fv/TVIRX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 559,800,000
Holdings Count | Holdings	49
Advisory Fees Paid, Amount	$ 4,600,000
Investment Company, Portfolio Turnover	32.79%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $559.8 Number of Holdings 49 Annual Portfolio Turnover 32.79% Total Advisory Fee $4.6
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 9.0 Mid Cap ($2.5-12 B) 52.2 Large Cap (>$12 B) 38.8 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 9.0% Mid Cap ($2.5-12 B) 52.2% Large Cap (>$12 B) 38.8% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Small/Mid Cap Core Fund - Class R5
Shareholder Report [Line Items]
Class Name	CLASS: R5
Trading Symbol	TVRRX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Small/Mid Cap Core Fund Class R5 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R5 $108.00 0.95%
Expenses Paid, Amount	$ 108
Expense Ratio, Percent	0.95%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R5 shares outperformed the Russell 2500 Index – Total Return (the “Index”) during the 12-month period ended September 30, 2024. Stock selection was the primary driver of the Fund’s relative outperformance. The Fund’s stock selection in the industrials and consumer discretionary sectors had a positive impact on performance relative to the Index during the period. Stock selection in and underweight allocations to health care and financials detracted from relative results. Returns of larger mid-cap companies outpaced smaller-cap companies within the Index during the period. Stock selection was a negative contributor to performance within the mid-cap (those ranging from approximately $2.5 - $12 billion market capitalization) and large-cap portions (those over approximately $12 billion market capitalization) of the Fund’s portfolio during the period. However, an overweight positioning in the Fund to larger stocks within the Index’s universe positively impacted the Fund’s performance relative to the Index for the period. Stock selection, as well as an underweight positioning to the smaller-cap segment of the universe, contributed positively to relative performance.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Small/Mid Cap Core Fund Russell 2500 Index - Total Return Russell 3000 Index - Total Return 09/30/2014 10000.0133 10000 10000 10/31/2014 10111.7794 10442.5942 10275.133 11/30/2014 10461.3023 10533.251 10524.1387 12/31/2014 10436.2328 10676.6699 10524.0202 01/31/2015 10247.001 10457.9285 10231.1204 02/28/2015 10863.5302 11081.4277 10823.5111 03/31/2015 10808.592 11228.531 10713.4813 04/30/2015 11052.762 11031.8505 10761.9405 05/31/2015 11256.237 11268.3263 10910.7933 06/30/2015 11182.986 11190.0848 10728.2506 07/31/2015 11333.5575 11169.2953 10907.6844 08/31/2015 10749.5843 10507.9662 10249.1933 09/30/2015 10265.3138 10037.8688 9950.534 10/31/2015 10883.8777 10598.8371 10736.4785 11/30/2015 10963.233 10807.0053 10795.9966 12/31/2015 10837.0785 10366.9084 10574.4045 01/31/2016 10161.5415 9540.2877 9977.7406 02/29/2016 9939.7538 9607.3008 9974.5274 03/31/2016 10574.5957 10407.6184 10676.794 04/30/2016 10611.2213 10561.1175 10742.9652 05/31/2016 10849.287 10783.7702 10935.16 06/30/2016 10774.0013 10779.4502 10957.6458 07/31/2016 11207.403 11341.6249 11392.5207 08/31/2016 11241.9938 11432.0677 11421.5817 09/30/2016 11371.95 11486.8731 11439.536 10/31/2016 11173.197 11020.6417 11192.0343 11/30/2016 11490.792 11958.1705 11692.9016 12/31/2016 11597.3953 12190.3391 11921.0671 01/31/2017 11864.1436 12359.5098 12145.4442 02/28/2017 12315.5638 12657.2451 12597.1533 03/31/2017 12514.5991 12648.2611 12605.7226 04/30/2017 12877.7872 12745.8521 12739.3407 05/31/2017 13119.9125 12603.3544 12869.7154 06/30/2017 13298.9404 12918.2402 12985.8568 07/31/2017 13529.1183 13052.007 13230.7044 08/31/2017 13625.7108 12943.6937 13256.1965 09/30/2017 13784.2921 13530.7446 13579.4861 10/31/2017 14008.5105 13740.4631 13875.8204 11/30/2017 14323.2392 14191.8661 14297.1609 12/31/2017 14358.6073 14239.6269 14440.0596 01/31/2018 15157.4574 14673.9183 15201.2038 02/28/2018 14441.3897 14070.4951 14640.8928 03/31/2018 14116.4688 14205.5593 14346.9915 04/30/2018 14296.5205 14239.2118 14401.5198 05/31/2018 14706.2934 14908.7918 14808.0786 06/30/2018 14712.502 15016.5214 14904.9227 07/31/2018 15225.7529 15307.063 15399.5545 08/31/2018 15469.961 15963.6244 15940.3524 09/30/2018 15438.9176 15721.7583 15966.738 10/31/2018 14201.3207 14125.6248 14791.0638 11/30/2018 14445.5288 14392.419 15087.3096 12/31/2018 13009.764 12815.3626 13683.1425 01/31/2019 14236.6671 14290.7738 14857.6224 02/28/2019 14539.2198 14965.7053 15380.151 03/31/2019 14835.5127 14842.4403 15604.728 04/30/2019 15421.8389 15362.5365 16227.8554 05/31/2019 14107.2998 14269.5432 15177.7201 06/30/2019 15069.2085 15281.9079 16243.7537 07/31/2019 15361.3283 15440.8687 16485.2181 08/31/2019 15077.5548 14823.1686 16149.1603 09/30/2019 15428.0986 15085.9475 16432.5919 10/31/2019 15730.6512 15374.7508 16786.3352 11/30/2019 16229.3415 16034.6203 17424.4142 12/31/2019 16823.955 16373.6882 17927.5233 01/31/2020 16402.3073 16041.2367 17907.9411 02/29/2020 15271.62 14696.1543 16441.7593 03/31/2020 12408.1913 11507.1307 14180.724 04/30/2020 14048.6318 13181.5316 16058.8224 05/31/2020 14564.6782 14155.1648 16917.6229 06/30/2020 14766.0623 14563.9768 17304.3924 07/31/2020 15582.087 15144.3075 18286.9924 08/31/2020 16677.1125 15829.9744 19611.7831 09/30/2020 16163.1638 15420.7019 18897.6985 10/31/2020 16452.6532 15699.9633 18489.825 11/30/2020 18057.432 18257.5481 20739.1715 12/31/2020 18858.7725 19647.3167 21672.1852 01/31/2021 18487.4707 20128.7527 21575.7888 02/28/2021 19924.4295 21441.9079 22250.1888 03/31/2021 20100.6405 21794.5653 23047.7 04/30/2021 21170.493 22665.269 24235.7902 05/31/2021 20853.7327 22712.2061 24346.427 06/30/2021 20996.3798 22980.6608 24946.7819 07/31/2021 21038.3348 22578.1215 25368.648 08/31/2021 21585.8475 23090.6283 26092.107 09/30/2021 21153.711 22364.3813 24921.4084 10/31/2021 21952.9538 23460.9617 26606.7068 11/30/2021 20599.1696 22482.217 26201.7175 12/31/2021 21534.8827 23219.6145 27233.5057 01/31/2022 19964.4546 21286.9299 25631.1915 02/28/2022 20483.2316 21526.6814 24985.5606 03/31/2022 20790.5506 21868.9407 25795.9975 04/30/2022 19067.8727 20005.6498 23481.0071 05/31/2022 19112.9838 20073.1949 23449.5237 06/30/2022 17370.5698 18155.3711 21487.7688 07/31/2022 18737.9982 20033.8601 23503.707 08/31/2022 17990.8466 19501.3551 22626.5647 09/30/2022 16324.5576 17643.8243 20528.4243 10/31/2022 17613.0417 19336.6212 22211.8772 11/30/2022 18492.707 20152.9477 23371.2533 12/31/2022 17400.3393 18954.3524 22002.7861 01/31/2023 18774.5722 20849.5055 23518.1774 02/28/2023 18108.7068 20360.1753 22968.4935 03/31/2023 17491.0103 19596.9612 23582.6516 04/30/2023 17471.176 19341.298 23833.9098 05/31/2023 16785.4763 19002.1652 23926.6418 06/30/2023 18304.2162 20620.8915 25560.4836 07/31/2023 18819.9077 21646.0933 26476.7444 08/31/2023 18644.2326 20796.218 25965.6445 09/30/2023 17978.3672 19634.7846 24728.7907 10/31/2023 17029.1547 18442.2218 24073.2616 11/30/2023 18358.0521 20102.3781 26318.0536 12/31/2023 19766.2867 22256.8203 27714.0123 01/31/2024 19474.4393 21674.6733 28021.1577 02/29/2024 20738.1669 22853.6855 29537.9574 03/31/2024 21831.8863 23796.8771 30490.7763 04/30/2024 20636.162 22202.6637 29149.1283 05/31/2024 21474.8691 23126.2073 30526.3399 06/30/2024 21160.354 22779.6538 31471.3556 07/31/2024 22228.5721 24472.081 32056.3767 08/31/2024 22616.7575 24409.1674 32754.2021 09/30/2024 22953.9405 24772.5666 33431.7499 Effective September 30, 2024, the Fund adopted the Russell 3000 Index – Total Return as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Russell 2500 Index—Total Return as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Small/Mid Cap Core Fund Class R5 27.68% 8.27% 8.66% Russell 2500 Index - Total Return 26.17% 10.43% 9.50% Russell 3000 Index - Total Return 35.19% 15.26% 12.83%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fv/TVRRX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 559,800,000
Holdings Count | Holdings	49
Advisory Fees Paid, Amount	$ 4,600,000
Investment Company, Portfolio Turnover	32.79%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $559.8 Number of Holdings 49 Annual Portfolio Turnover 32.79% Total Advisory Fee $4.6
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 9.0 Mid Cap ($2.5-12 B) 52.2 Large Cap (>$12 B) 38.8 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 9.0% Mid Cap ($2.5-12 B) 52.2% Large Cap (>$12 B) 38.8% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Small/Mid Cap Growth Fund - Class A
Shareholder Report [Line Items]
Class Name	CLASS: A
Trading Symbol	THCGX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Small/Mid Cap Growth Fund Class A Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $160.00 1.42%
Expenses Paid, Amount	$ 160
Expense Ratio, Percent	1.42%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class A shares underperformed the Russell 2500 Growth Index - Total Return (the “Index”) during the 12-month period ended September 30, 2024. The Fund’s stock selection in the information technology and energy sectors had a positive impact on performance relative to the Index during the period. Stock selection in and underweight allocations to health care and consumer discretionary stocks detracted from relative results. Returns of mid-cap companies outpaced small-cap companies within the Index during the period. Stock selection was the primary detractor from performance within the mid-cap (those ranging from approximately $2.5 - $12 billion market capitalization) portion of the Fund’s portfolio. However, an underweight positioning in the Fund to smaller stocks (those under approximately $2.5 billion market capitalization) and an overweight positioning to larger stocks (those over approximately $12 billion market capitalization) within the Index’s universe had positive impacts on the Fund’s performance relative to the Index.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Small/Mid Cap Growth Fund Russell 2500 Growth Index - Total Return Russell 3000 Index - Total Return 09/30/2014 9548.568 10000 10000 10/31/2014 9945.8231 10440.1539 10275.133 11/30/2014 9895.2634 10613.8136 10524.1387 12/31/2014 9873.5949 10748.8712 10524.0202 01/31/2015 9682.1902 10583.1968 10231.1204 02/28/2015 10227.5131 11362.1033 10823.5111 03/31/2015 10227.5131 11548.3692 10713.4813 04/30/2015 10238.3473 11308.2289 10761.9405 05/31/2015 10306.9641 11657.0691 10910.7933 06/30/2015 10335.8554 11618.9727 10728.2506 07/31/2015 10440.5863 11756.6519 10907.6844 08/31/2015 9758.0298 10932.9725 10249.1933 09/30/2015 9422.1687 10335.3979 9950.534 10/31/2015 10108.3366 10875.4516 10736.4785 11/30/2015 10433.3635 11121.7296 10795.9966 12/31/2015 10148.0621 10728.7855 10574.4045 01/31/2016 8974.3539 9667.8382 9977.7406 02/29/2016 8710.7209 9697.0839 9974.5274 03/31/2016 9418.5573 10443.495 10676.794 04/30/2016 9306.6036 10543.6262 10742.9652 05/31/2016 9563.0137 10805.4548 10935.16 06/30/2016 9321.0492 10725.3879 10957.6458 07/31/2016 9877.2064 11362.6518 11392.5207 08/31/2016 10028.8856 11441.5829 11421.5817 09/30/2016 10191.399 11474.5198 11439.536 10/31/2016 10003.6057 10875.3738 11192.0343 11/30/2016 10083.0567 11668.1758 11692.9016 12/31/2016 9909.709 11772.4747 11921.0671 01/31/2017 10426.1407 12051.3124 12145.4442 02/28/2017 10718.6649 12416.8331 12597.1533 03/31/2017 10812.5615 12508.3392 12605.7226 04/30/2017 11079.8059 12728.316 12739.3407 05/31/2017 11271.2106 12734.1543 12869.7154 06/30/2017 11357.8845 13024.4312 12985.8568 07/31/2017 11715.414 13197.7486 13230.7044 08/31/2017 11578.1805 13223.521 13256.1965 09/30/2017 11722.6369 13776.9956 13579.4861 10/31/2017 11827.3677 14145.5599 13875.8204 11/30/2017 12054.8866 14612.0578 14297.1609 12/31/2017 12278.794 14651.4962 14440.0596 01/31/2018 13163.5895 15382.9032 15201.2038 02/28/2018 13073.3042 14878.445 14640.8928 03/31/2018 13008.2988 15000.0019 14346.9915 04/30/2018 13214.1492 14904.7482 14401.5198 05/31/2018 13568.0674 15697.7623 14808.0786 06/30/2018 13860.5916 15829.152 14904.9227 07/31/2018 13994.2138 16125.5881 15399.5545 08/31/2018 14817.6152 17214.9293 15940.3524 09/30/2018 14600.9306 16963.5247 15966.738 10/31/2018 13224.9834 14926.0048 14791.0638 11/30/2018 13073.3042 15207.8413 15087.3096 12/31/2018 11964.6013 13557.5089 13683.1425 01/31/2019 13300.823 15172.0319 14857.6224 02/28/2019 13842.5345 16171.8137 15380.151 03/31/2019 14113.3903 16131.6617 15604.728 04/30/2019 14933.1803 16696.3052 16227.8554 05/31/2019 13665.5754 15587.31 15177.7201 06/30/2019 14535.9252 16799.8243 16243.7537 07/31/2019 14853.7293 17062.034 16485.2181 08/31/2019 14395.0803 16577.3348 16149.1603 09/30/2019 14218.1212 16265.5525 16432.5919 10/31/2019 14445.64 16682.9543 16786.3352 11/30/2019 15189.8183 17819.1862 17424.4142 12/31/2019 15423.8129 17984.6195 17927.5233 01/31/2020 15975.0883 18004.3493 17907.9411 02/29/2020 15233.4444 16783.1069 16441.7593 03/31/2020 13448.7399 13808.8142 14180.724 04/30/2020 15300.8666 16022.9423 16058.8224 05/31/2020 16807.9504 17696.2018 16917.6229 06/30/2020 17609.0844 18347.7442 17304.3924 07/31/2020 18648.179 19351.8531 18286.9924 08/31/2020 20040.2485 20222.8453 19611.7831 09/30/2020 19104.2702 20067.4919 18897.6985 10/31/2020 18671.9751 20304.3825 18489.825 11/30/2020 20801.6562 23261.6193 20739.1715 12/31/2020 21847.0294 25262.836 21672.1852 01/31/2021 21847.0294 25968.988 21575.7888 02/28/2021 22257.5605 26784.6666 22250.1888 03/31/2021 20822.8176 25891.2666 23047.7 04/30/2021 22185.6118 26800.8006 24235.7902 05/31/2021 21250.2779 26055.8928 24346.427 06/30/2021 22206.7732 27454.0778 24946.7819 07/31/2021 22574.9815 26859.9901 25368.648 08/31/2021 22769.6664 27531.9742 26092.107 09/30/2021 21910.5136 26484.4226 24921.4084 10/31/2021 23087.0874 27842.3583 26606.7068 11/30/2021 21143.202 26407.8058 26201.7175 12/31/2021 20902.6506 26537.2003 27233.5057 01/31/2022 17781.8127 23036.1894 25631.1915 02/28/2022 17984.3823 23105.4685 24985.5606 03/31/2022 17794.4733 23272.0162 25795.9975 04/30/2022 15407.9502 20614.5915 23481.0071 05/31/2022 14648.3142 20114.1512 23449.5237 06/30/2022 13356.933 18722.174 21487.7688 07/31/2022 14831.8929 20858.2091 23503.707 08/31/2022 14578.6809 20461.7857 22626.5647 09/30/2022 13401.2451 18699.3733 20528.4243 10/31/2022 14160.8811 20218.9499 22211.8772 11/30/2022 14616.6627 20820.7972 23371.2533 12/31/2022 13755.7419 19581.585 22002.7861 01/31/2023 14907.8565 21541.5216 23518.1774 02/28/2023 14426.7537 21201.0069 22968.4935 03/31/2023 14648.3142 20862.9602 23582.6516 04/30/2023 14825.5626 20599.5155 23833.9098 05/31/2023 14812.902 20576.9268 23926.6418 06/30/2023 16256.2104 22201.3119 25560.4836 07/31/2023 16452.4497 22942.7346 26476.7444 08/31/2023 16205.568 22008.7799 25965.6445 09/30/2023 15369.9684 20683.4408 24728.7907 10/31/2023 13945.6509 19247.8226 24073.2616 11/30/2023 15135.7473 20953.669 26318.0536 12/31/2023 16446.1194 23288.4146 27714.0123 01/31/2024 16522.083 22761.5874 28021.1577 02/29/2024 18123.6489 24605.9376 29537.9574 03/31/2024 18687.0456 25269.8333 30490.7763 04/30/2024 17515.9401 23386.8052 29149.1283 05/31/2024 18224.9337 24335.2077 30526.3399 06/30/2024 18142.6398 24204.6697 31471.3556 07/31/2024 18579.4305 25678.8142 32056.3767 08/31/2024 19066.8636 25480.0609 32754.2021 09/30/2024 19136.4969 25896.2783 33431.7499 Effective September 30, 2024, the Fund adopted the Russell 3000 Index – Total Return as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Russell 2500 Index—Total Return as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Small/Mid Cap Growth Fund Class A (with sales charge) 18.92% 5.15% 6.71% Small/Mid Cap Growth Fund Class A (without sales charge) 24.51% 6.12% 7.20% Russell 2500 Growth Index - Total Return 25.20% 9.75% 9.98% Russell 3000 Index - Total Return 35.19% 15.26% 12.83%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment and assumes the deduction of the maximum sales charge associated with that investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fcg/THCGX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 275,600,000
Holdings Count | Holdings	47
Advisory Fees Paid, Amount	$ 2,300,000
Investment Company, Portfolio Turnover	32.58%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $275.6 Number of Holdings 47 Annual Portfolio Turnover 32.58% Total Advisory Fee $2.3
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 3.1 Mid Cap ($2.5-12 B) 52.2 Large Cap (>$12 B) 44.7 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 3.1% Mid Cap ($2.5-12 B) 52.2% Large Cap (>$12 B) 44.7% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Small/Mid Cap Growth Fund - Class C
Shareholder Report [Line Items]
Class Name	CLASS: C
Trading Symbol	TCGCX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Small/Mid Cap Growth Fund Class C Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $261.00 2.34%
Expenses Paid, Amount	$ 261
Expense Ratio, Percent	2.34%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class C shares underperformed the Russell 2500 Growth Index - Total Return (the “Index”) during the 12-month period ended September 30, 2024. The Fund’s stock selection in the information technology and energy sectors had a positive impact on performance relative to the Index during the period. Stock selection in and underweight allocations to health care and consumer discretionary stocks detracted from relative results. Returns of mid-cap companies outpaced small-cap companies within the Index during the period. Stock selection was the primary detractor from performance within the mid-cap (those ranging from approximately $2.5 - $12 billion market capitalization) portion of the Fund’s portfolio. However, an underweight positioning in the Fund to smaller stocks (those under approximately $2.5 billion market capitalization) and an overweight positioning to larger stocks (those over approximately $12 billion market capitalization) within the Index’s universe had positive impacts on the Fund’s performance relative to the Index.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Small/Mid Cap Growth Fund Russell 2500 Growth Index - Total Return Russell 3000 Index - Total Return 09/30/2014 9999.9991 10000 10000 10/31/2014 10409.4545 10440.1539 10275.133 11/30/2014 10350.3579 10613.8136 10524.1387 12/31/2014 10320.8095 10748.8712 10524.0202 01/31/2015 10113.9712 10583.1968 10231.1204 02/28/2015 10679.6107 11362.1033 10823.5111 03/31/2015 10671.1683 11548.3692 10713.4813 04/30/2015 10675.3895 11308.2289 10761.9405 05/31/2015 10738.7074 11657.0691 10910.7933 06/30/2015 10759.8133 11618.9727 10728.2506 07/31/2015 10865.3431 11756.6519 10907.6844 08/31/2015 10147.7408 10932.9725 10249.1933 09/30/2015 9793.1608 10335.3979 9950.534 10/31/2015 10498.0995 10875.4516 10736.4785 11/30/2015 10827.3524 11121.7296 10795.9966 12/31/2015 10523.4267 10728.7855 10574.4045 01/31/2016 9303.5028 9667.8382 9977.7406 02/29/2016 9024.9042 9697.0839 9974.5274 03/31/2016 9750.9489 10443.495 10676.794 04/30/2016 9632.7556 10543.6262 10742.9652 05/31/2016 9890.2482 10805.4548 10935.16 06/30/2016 9632.7556 10725.3879 10957.6458 07/31/2016 10198.395 11362.6518 11392.5207 08/31/2016 10350.3579 11441.5829 11421.5817 09/30/2016 10510.7631 11474.5198 11439.536 10/31/2016 10312.3672 10875.3738 11192.0343 11/30/2016 10388.3486 11668.1758 11692.9016 12/31/2016 10202.6162 11772.4747 11921.0671 01/31/2017 10730.265 12051.3124 12145.4442 02/28/2017 11021.5271 12416.8331 12597.1533 03/31/2017 11110.1721 12508.3392 12605.7226 04/30/2017 11376.1071 12728.316 12739.3407 05/31/2017 11566.0606 12734.1543 12869.7154 06/30/2017 11650.4844 13024.4312 12985.8568 07/31/2017 12005.0644 13197.7486 13230.7044 08/31/2017 11857.3227 13223.521 13256.1965 09/30/2017 12000.8432 13776.9956 13579.4861 10/31/2017 12097.9305 14145.5599 13875.8204 11/30/2017 12325.8748 14612.0578 14297.1609 12/31/2017 12545.3767 14651.4962 14440.0596 01/31/2018 13440.269 15382.9032 15201.2038 02/28/2018 13338.9604 14878.445 14640.8928 03/31/2018 13262.979 15000.0019 14346.9915 04/30/2018 13465.5961 14904.7482 14401.5198 05/31/2018 13815.9549 15697.7623 14808.0786 06/30/2018 14107.217 15829.152 14904.9227 07/31/2018 14229.6315 16125.5881 15399.5545 08/31/2018 15056.9847 17214.9293 15940.3524 09/30/2018 14820.5981 16963.5247 15966.738 10/31/2018 13414.9418 14926.0048 14791.0638 11/30/2018 13254.5366 15207.8413 15087.3096 12/31/2018 12119.0365 13557.5089 13683.1425 01/31/2019 13461.3749 15172.0319 14857.6224 02/28/2019 14001.6872 16171.8137 15380.151 03/31/2019 14263.401 16131.6617 15604.728 04/30/2019 15082.3119 16696.3052 16227.8554 05/31/2019 13794.8489 15587.31 15177.7201 06/30/2019 14660.1929 16799.8243 16243.7537 07/31/2019 14972.5609 17062.034 16485.2181 08/31/2019 14504.0088 16577.3348 16149.1603 09/30/2019 14314.0553 16265.5525 16432.5919 10/31/2019 14537.7784 16682.9543 16786.3352 11/30/2019 15276.4109 17819.1862 17424.4142 12/31/2019 15502.5188 17984.6195 17927.5233 01/31/2020 16044.2355 18004.3493 17907.9411 02/29/2020 15290.5427 16783.1069 16441.7593 03/31/2020 13486.3905 13808.8142 14180.724 04/30/2020 15337.6485 16022.9423 16058.8224 05/31/2020 16835.6129 17696.2018 16917.6229 06/30/2020 17631.7009 18347.7442 17304.3924 07/31/2020 18658.6074 19351.8531 18286.9924 08/31/2020 20043.5179 20222.8453 19611.7831 09/30/2020 19091.9807 20067.4919 18897.6985 10/31/2020 18649.1862 20304.3825 18489.825 11/30/2020 20759.024 23261.6193 20739.1715 12/31/2020 21787.5555 25262.836 21672.1852 01/31/2021 21772.2802 25968.988 21575.7888 02/28/2021 22169.436 26784.6666 22250.1888 03/31/2021 20728.4735 25891.2666 23047.7 04/30/2021 22072.6929 26800.8006 24235.7902 05/31/2021 21125.6293 26055.8928 24346.427 06/30/2021 22062.5094 27454.0778 24946.7819 07/31/2021 22413.8395 26859.9901 25368.648 08/31/2021 22592.0504 27531.9742 26092.107 09/30/2021 21726.4546 26484.4226 24921.4084 10/31/2021 22877.1878 27842.3583 26606.7068 11/30/2021 20942.1167 26407.8058 26201.7175 12/31/2021 20686.4131 26537.2003 27233.5057 01/31/2022 17575.3539 23036.1894 25631.1915 02/28/2022 17762.8698 23105.4685 24985.5606 03/31/2022 17558.307 23272.0162 25795.9975 04/30/2022 15197.3114 20614.5915 23481.0071 05/31/2022 14438.7243 20114.1512 23449.5237 06/30/2022 13151.6833 18722.174 21487.7688 07/31/2022 14592.1464 20858.2091 23503.707 08/31/2022 14336.4429 20461.7857 22626.5647 09/30/2022 13168.7302 18699.3733 20528.4243 10/31/2022 13910.2704 20218.9499 22211.8772 11/30/2022 14344.9664 20820.7972 23371.2533 12/31/2022 13484.0979 19581.585 22002.7861 01/31/2023 14600.6699 21541.5216 23518.1774 02/28/2023 14123.3567 21201.0069 22968.4935 03/31/2023 14327.9195 20862.9602 23582.6516 04/30/2023 14489.865 20599.5155 23833.9098 05/31/2023 14464.2947 20576.9268 23926.6418 06/30/2023 15870.6639 22201.3119 25560.4836 07/31/2023 16049.6564 22942.7346 26476.7444 08/31/2023 15785.4294 22008.7799 25965.6445 09/30/2023 14967.1782 20683.4408 24728.7907 10/31/2023 13569.3324 19247.8226 24073.2616 11/30/2023 14711.4747 20953.669 26318.0536 12/31/2023 15981.4688 23288.4146 27714.0123 01/31/2024 16032.6095 22761.5874 28021.1577 02/29/2024 17583.8774 24605.9376 29537.9574 03/31/2024 18112.3313 25269.8333 30490.7763 04/30/2024 16961.6655 23386.8052 29149.1283 05/31/2024 17643.5415 24335.2077 30526.3399 06/30/2024 17541.2601 24204.6697 31471.3556 07/31/2024 17950.3857 25678.8142 32056.3767 08/31/2024 18410.652 25480.0609 32754.2021 09/30/2024 18461.7927 25896.2783 33431.7499 Effective September 30, 2024, the Fund adopted the Russell 3000 Index – Total Return as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Russell 2500 Index—Total Return as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Small/Mid Cap Growth Fund Class C (with sales charge) 22.35% 5.22% 6.32% Small/Mid Cap Growth Fund Class C (without sales charge) 23.35% 5.22% 6.32% Russell 2500 Growth Index - Total Return 25.20% 9.75% 9.98% Russell 3000 Index - Total Return 35.19% 15.26% 12.83%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fcg/TCGCX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 275,600,000
Holdings Count | Holdings	47
Advisory Fees Paid, Amount	$ 2,300,000
Investment Company, Portfolio Turnover	32.58%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $275.6 Number of Holdings 47 Annual Portfolio Turnover 32.58% Total Advisory Fee $2.3
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 3.1 Mid Cap ($2.5-12 B) 52.2 Large Cap (>$12 B) 44.7 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 3.1% Mid Cap ($2.5-12 B) 52.2% Large Cap (>$12 B) 44.7% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Small/Mid Cap Growth Fund - Class I
Shareholder Report [Line Items]
Class Name	CLASS: I
Trading Symbol	THIGX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Small/Mid Cap Growth Fund Class I Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $107.00 0.95%
Expenses Paid, Amount	$ 107
Expense Ratio, Percent	0.95%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class I shares underperformed the Russell 2500 Growth Index - Total Return (the “Index”) during the 12-month period ended September 30, 2024. The Fund’s stock selection in the information technology and energy sectors had a positive impact on performance relative to the Index during the period. Stock selection in and underweight allocations to health care and consumer discretionary stocks detracted from relative results. Returns of mid-cap companies outpaced small-cap companies within the Index during the period. Stock selection was the primary detractor from performance within the mid-cap (those ranging from approximately $2.5 - $12 billion market capitalization) portion of the Fund’s portfolio. However, an underweight positioning in the Fund to smaller stocks (those under approximately $2.5 billion market capitalization) and an overweight positioning to larger stocks (those over approximately $12 billion market capitalization) within the Index’s universe had positive impacts on the Fund’s performance relative to the Index.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Small/Mid Cap Growth Fund Russell 2500 Growth Index - Total Return Russell 3000 Index - Total Return 09/30/2014 10000.0017 10000 10000 10/31/2014 10419.3566 10440.1539 10275.133 11/30/2014 10372.7616 10613.8136 10524.1387 12/31/2014 10351.2562 10748.8712 10524.0202 01/31/2015 10150.5394 10583.1968 10231.1204 02/28/2015 10727.6004 11362.1033 10823.5111 03/31/2015 10731.1846 11548.3692 10713.4813 04/30/2015 10745.5215 11308.2289 10761.9405 05/31/2015 10820.7904 11657.0691 10910.7933 06/30/2015 10853.0484 11618.9727 10728.2506 07/31/2015 10971.328 11756.6519 10907.6844 08/31/2015 10254.482 10932.9725 10249.1933 09/30/2015 9906.8117 10335.3979 9950.534 10/31/2015 10630.8262 10875.4516 10736.4785 11/30/2015 10974.9123 11121.7296 10795.9966 12/31/2015 10681.0054 10728.7855 10574.4045 01/31/2016 9451.6145 9667.8382 9977.7406 02/29/2016 9175.6288 9697.0839 9974.5274 03/31/2016 9921.1486 10443.495 10676.794 04/30/2016 9810.0375 10543.6262 10742.9652 05/31/2016 10086.0232 10805.4548 10935.16 06/30/2016 9831.5429 10725.3879 10957.6458 07/31/2016 10419.3566 11362.6518 11392.5207 08/31/2016 10587.8154 11441.5829 11421.5817 09/30/2016 10756.2742 11474.5198 11439.536 10/31/2016 10562.7258 10875.3738 11192.0343 11/30/2016 10652.3316 11668.1758 11692.9016 12/31/2016 10473.1201 11772.4747 11921.0671 01/31/2017 11025.0915 12051.3124 12145.4442 02/28/2017 11336.9195 12416.8331 12597.1533 03/31/2017 11437.2779 12508.3392 12605.7226 04/30/2017 11724.0163 12728.316 12739.3407 05/31/2017 11931.9017 12734.1543 12869.7154 06/30/2017 12028.6759 13024.4312 12985.8568 07/31/2017 12408.6043 13197.7486 13230.7044 08/31/2017 12268.8193 13223.521 13256.1965 09/30/2017 12426.5254 13776.9956 13579.4861 10/31/2017 12541.2208 14145.5599 13875.8204 11/30/2017 12788.5326 14612.0578 14297.1609 12/31/2017 13028.676 14651.4962 14440.0596 01/31/2018 13974.9128 15382.9032 15201.2038 02/28/2018 13881.7228 14878.445 14640.8928 03/31/2018 13817.2067 15000.0019 14346.9915 04/30/2018 14039.4289 14904.7482 14401.5198 05/31/2018 14415.7731 15697.7623 14808.0786 06/30/2018 14731.1853 15829.152 14904.9227 07/31/2018 14881.723 16125.5881 15399.5545 08/31/2018 15759.8593 17214.9293 15940.3524 09/30/2018 15530.4686 16963.5247 15966.738 10/31/2018 14071.687 14926.0048 14791.0638 11/30/2018 13917.5651 15207.8413 15087.3096 12/31/2018 12741.9376 13557.5089 13683.1425 01/31/2019 14164.877 15172.0319 14857.6224 02/28/2019 14749.1065 16171.8137 15380.151 03/31/2019 15039.4291 16131.6617 15604.728 04/30/2019 15917.5654 16696.3052 16227.8554 05/31/2019 14573.4792 15587.31 15177.7201 06/30/2019 15501.7948 16799.8243 16243.7537 07/31/2019 15845.8808 17062.034 16485.2181 08/31/2019 15365.594 16577.3348 16149.1603 09/30/2019 15179.2141 16265.5525 16432.5919 10/31/2019 15430.1101 16682.9543 16786.3352 11/30/2019 16226.176 17819.1862 17424.4142 12/31/2019 16484.1687 17984.6195 17927.5233 01/31/2020 17078.3336 18004.3493 17907.9411 02/29/2020 16288.7197 16783.1069 16441.7593 03/31/2020 14381.1374 13808.8142 14180.724 04/30/2020 16366.8993 16022.9423 16058.8224 05/31/2020 17985.217 17696.2018 16917.6229 06/30/2020 18849.1016 18347.7442 17304.3924 07/31/2020 19967.0698 19351.8531 18286.9924 08/31/2020 21464.2092 20222.8453 19611.7831 09/30/2020 20467.4193 20067.4919 18897.6985 10/31/2020 20010.0686 20304.3825 18489.825 11/30/2020 22296.941 23261.6193 20739.1715 12/31/2020 23421.3308 25262.836 21672.1852 01/31/2021 23429.6289 25968.988 21575.7888 02/28/2021 23873.5762 26784.6666 22250.1888 03/31/2021 22342.5804 25891.2666 23047.7 04/30/2021 23811.3406 26800.8006 24235.7902 05/31/2021 22815.571 26055.8928 24346.427 06/30/2021 23848.6819 27454.0778 24946.7819 07/31/2021 24251.1388 26859.9901 25368.648 08/31/2021 24466.8889 27531.9742 26092.107 09/30/2021 23545.802 26484.4226 24921.4084 10/31/2021 24819.5573 27842.3583 26606.7068 11/30/2021 22736.6245 26407.8058 26201.7175 12/31/2021 22486.9021 26537.2003 27233.5057 01/31/2022 19133.4879 23036.1894 25631.1915 02/28/2022 19359.4271 23105.4685 24985.5606 03/31/2022 19157.2709 23272.0162 25795.9975 04/30/2022 16600.5898 20614.5915 23481.0071 05/31/2022 15786.0194 20114.1512 23449.5237 06/30/2022 14406.6007 18722.174 21487.7688 07/31/2022 16000.0671 20858.2091 23503.707 08/31/2022 15732.5074 20461.7857 22626.5647 09/30/2022 14472.0042 18699.3733 20528.4243 10/31/2022 15298.4662 20218.9499 22211.8772 11/30/2022 15797.9109 20820.7972 23371.2533 12/31/2022 14870.3708 19581.585 22002.7861 01/31/2023 16118.9825 21541.5216 23518.1774 02/28/2023 15607.6463 21201.0069 22968.4935 03/31/2023 15851.4228 20862.9602 23582.6516 04/30/2023 16053.579 20599.5155 23833.9098 05/31/2023 16041.6875 20576.9268 23926.6418 06/30/2023 17617.3165 22201.3119 25560.4836 07/31/2023 17837.31 22942.7346 26476.7444 08/31/2023 17569.7503 22008.7799 25965.6445 09/30/2023 16671.9391 20683.4408 24728.7907 10/31/2023 15137.9304 19247.8226 24073.2616 11/30/2023 16434.1083 20953.669 26318.0536 12/31/2023 17867.0389 23288.4146 27714.0123 01/31/2024 17950.2796 22761.5874 28021.1577 02/29/2024 19704.2818 24605.9376 29537.9574 03/31/2024 20322.6419 25269.8333 30490.7763 04/30/2024 19056.1928 23386.8052 29149.1283 05/31/2024 19835.0887 24335.2077 30526.3399 06/30/2024 19751.8479 24204.6697 31471.3556 07/31/2024 20233.4553 25678.8142 32056.3767 08/31/2024 20774.5204 25480.0609 32754.2021 09/30/2024 20857.7612 25896.2783 33431.7499 Effective September 30, 2024, the Fund adopted the Russell 3000 Index – Total Return as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Russell 2500 Index—Total Return as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Small/Mid Cap Growth Fund Class I 25.11% 6.56% 7.63% Russell 2500 Growth Index - Total Return 25.20% 9.75% 9.98% Russell 3000 Index - Total Return 35.19% 15.26% 12.83%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fcg/THIGX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 275,600,000
Holdings Count | Holdings	47
Advisory Fees Paid, Amount	$ 2,300,000
Investment Company, Portfolio Turnover	32.58%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $275.6 Number of Holdings 47 Annual Portfolio Turnover 32.58% Total Advisory Fee $2.3
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 3.1 Mid Cap ($2.5-12 B) 52.2 Large Cap (>$12 B) 44.7 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 3.1% Mid Cap ($2.5-12 B) 52.2% Large Cap (>$12 B) 44.7% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Small/Mid Cap Growth Fund - Class R3
Shareholder Report [Line Items]
Class Name	CLASS: R3
Trading Symbol	THCRX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Small/Mid Cap Growth Fund Class R3 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R3 $164.00 1.46%
Expenses Paid, Amount	$ 164
Expense Ratio, Percent	1.46%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R3 shares underperformed the Russell 2500 Growth Index - Total Return (the “Index”) during the 12-month period ended September 30, 2024. The Fund’s stock selection in the information technology and energy sectors had a positive impact on performance relative to the Index during the period. Stock selection in and underweight allocations to health care and consumer discretionary stocks detracted from relative results. Returns of mid-cap companies outpaced small-cap companies within the Index during the period. Stock selection was the primary detractor from performance within the mid-cap (those ranging from approximately $2.5 - $12 billion market capitalization) portion of the Fund’s portfolio. However, an underweight positioning in the Fund to smaller stocks (those under approximately $2.5 billion market capitalization) and an overweight positioning to larger stocks (those over approximately $12 billion market capitalization) within the Index’s universe had positive impacts on the Fund’s performance relative to the Index.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Small/Mid Cap Growth Fund Russell 2500 Growth Index - Total Return Russell 3000 Index - Total Return 09/30/2014 9999.9891 10000 10000 10/31/2014 10416.8132 10440.1539 10275.133 11/30/2014 10363.7629 10613.8136 10524.1387 12/31/2014 10337.2377 10748.8712 10524.0202 01/31/2015 10136.4043 10583.1968 10231.1204 02/28/2015 10708.5901 11362.1033 10823.5111 03/31/2015 10704.8007 11548.3692 10713.4813 04/30/2015 10716.1687 11308.2289 10761.9405 05/31/2015 10784.3763 11657.0691 10910.7933 06/30/2015 10814.6907 11618.9727 10728.2506 07/31/2015 10924.5807 11756.6519 10907.6844 08/31/2015 10208.4011 10932.9725 10249.1933 09/30/2015 9855.9953 10335.3979 9950.534 10/31/2015 10572.1749 10875.4516 10736.4785 11/30/2015 10913.2128 11121.7296 10795.9966 12/31/2015 10613.8573 10728.7855 10574.4045 01/31/2016 9386.1209 9667.8382 9977.7406 02/29/2016 9109.5012 9697.0839 9974.5274 03/31/2016 9848.4167 10443.495 10676.794 04/30/2016 9730.9481 10543.6262 10742.9652 05/31/2016 9999.9891 10805.4548 10935.16 06/30/2016 9742.316 10725.3879 10957.6458 07/31/2016 10325.8697 11362.6518 11392.5207 08/31/2016 10485.0208 11441.5829 11421.5817 09/30/2016 10647.9611 11474.5198 11439.536 10/31/2016 10450.917 10875.3738 11192.0343 11/30/2016 10534.2818 11668.1758 11692.9016 12/31/2016 10352.3949 11772.4747 11921.0671 01/31/2017 10894.2663 12051.3124 12145.4442 02/28/2017 11197.411 12416.8331 12597.1533 03/31/2017 11292.1438 12508.3392 12605.7226 04/30/2017 11572.5527 12728.316 12739.3407 05/31/2017 11769.5969 12734.1543 12869.7154 06/30/2017 11860.5403 13024.4312 12985.8568 07/31/2017 12231.8927 13197.7486 13230.7044 08/31/2017 12087.8989 13223.521 13256.1965 09/30/2017 12239.4713 13776.9956 13579.4861 10/31/2017 12345.572 14145.5599 13875.8204 11/30/2017 12584.2985 14612.0578 14297.1609 12/31/2017 12815.4464 14651.4962 14440.0596 01/31/2018 13740.0381 15382.9032 15201.2038 02/28/2018 13641.516 14878.445 14640.8928 03/31/2018 13573.3084 15000.0019 14346.9915 04/30/2018 13785.5098 14904.7482 14401.5198 05/31/2018 14153.0728 15697.7623 14808.0786 06/30/2018 14456.2176 15829.152 14904.9227 07/31/2018 14592.6328 16125.5881 15399.5545 08/31/2018 15449.0169 17214.9293 15940.3524 09/30/2018 15217.869 16963.5247 15966.738 10/31/2018 13785.5098 14926.0048 14791.0638 11/30/2018 13626.3588 15207.8413 15087.3096 12/31/2018 12466.8299 13557.5089 13683.1425 01/31/2019 13857.5067 15172.0319 14857.6224 02/28/2019 14422.1139 16171.8137 15380.151 03/31/2019 14698.7335 16131.6617 15604.728 04/30/2019 15551.3282 16696.3052 16227.8554 05/31/2019 14228.8591 15587.31 15177.7201 06/30/2019 15134.5041 16799.8243 16243.7537 07/31/2019 15460.3848 17062.034 16485.2181 08/31/2019 14986.721 16577.3348 16149.1603 09/30/2019 14797.2555 16265.5525 16432.5919 10/31/2019 15035.9821 16682.9543 16786.3352 11/30/2019 15805.1883 17819.1862 17424.4142 12/31/2019 16046.7432 17984.6195 17927.5233 01/31/2020 16617.3126 18004.3493 17907.9411 02/29/2020 15846.8357 16783.1069 16441.7593 03/31/2020 13985.1969 13808.8142 14180.724 04/30/2020 15909.3068 16022.9423 16058.8224 05/31/2020 17475.249 17696.2018 16917.6229 06/30/2020 18308.197 18347.7442 17304.3924 07/31/2020 19382.7 19351.8531 18286.9924 08/31/2020 20827.8647 20222.8453 19611.7831 09/30/2020 19853.3156 20067.4919 18897.6985 10/31/2020 19399.3589 20304.3825 18489.825 11/30/2020 21610.8884 23261.6193 20739.1715 12/31/2020 22687.2076 25262.836 21672.1852 01/31/2021 22687.2076 25968.988 21575.7888 02/28/2021 23109.7296 26784.6666 22250.1888 03/31/2021 21615.336 25891.2666 23047.7 04/30/2021 23029.6728 26800.8006 24235.7902 05/31/2021 22055.6484 26055.8928 24346.427 06/30/2021 23043.0156 27454.0778 24946.7819 07/31/2021 23421.0616 26859.9901 25368.648 08/31/2021 23621.2036 27531.9742 26092.107 09/30/2021 22722.7884 26484.4226 24921.4084 10/31/2021 23941.4308 27842.3583 26606.7068 11/30/2021 21926.8292 26407.8058 26201.7175 12/31/2021 21672.3334 26537.2003 27233.5057 01/31/2022 18430.8595 23036.1894 25631.1915 02/28/2022 18645.1718 23105.4685 24985.5606 03/31/2022 18444.254 23272.0162 25795.9975 04/30/2022 15972.9651 20614.5915 23481.0071 05/31/2022 15182.6884 20114.1512 23449.5237 06/30/2022 13849.9337 18722.174 21487.7688 07/31/2022 15376.909 20858.2091 23503.707 08/31/2022 15115.7158 20461.7857 22626.5647 09/30/2022 13896.8145 18699.3733 20528.4243 10/31/2022 14680.3939 20218.9499 22211.8772 11/30/2022 15155.8994 20820.7972 23371.2533 12/31/2022 14258.4665 19581.585 22002.7861 01/31/2023 15457.2761 21541.5216 23518.1774 02/28/2023 14954.9816 21201.0069 22968.4935 03/31/2023 15182.6884 20862.9602 23582.6516 04/30/2023 15370.2117 20599.5155 23833.9098 05/31/2023 15356.8172 20576.9268 23926.6418 06/30/2023 16850.3062 22201.3119 25560.4836 07/31/2023 17057.9212 22942.7346 26476.7444 08/31/2023 16796.7281 22008.7799 25965.6445 09/30/2023 15926.0843 20683.4408 24728.7907 10/31/2023 14452.6871 19247.8226 24073.2616 11/30/2023 15684.9829 20953.669 26318.0536 12/31/2023 17044.5267 23288.4146 27714.0123 01/31/2024 17118.1966 22761.5874 28021.1577 02/29/2024 18785.8143 24605.9376 29537.9574 03/31/2024 19368.4759 25269.8333 30490.7763 04/30/2024 18149.5746 23386.8052 29149.1283 05/31/2024 18886.2732 24335.2077 30526.3399 06/30/2024 18799.2088 24204.6697 31471.3556 07/31/2024 19247.9252 25678.8142 32056.3767 08/31/2024 19756.917 25480.0609 32754.2021 09/30/2024 19823.8896 25896.2783 33431.7499 Effective September 30, 2024, the Fund adopted the Russell 3000 Index – Total Return as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Russell 2500 Index—Total Return as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Small/Mid Cap Growth Fund Class R3 24.47% 6.02% 7.08% Russell 2500 Growth Index - Total Return 25.20% 9.75% 9.98% Russell 3000 Index - Total Return 35.19% 15.26% 12.83%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fcg/THCRX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 275,600,000
Holdings Count | Holdings	47
Advisory Fees Paid, Amount	$ 2,300,000
Investment Company, Portfolio Turnover	32.58%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $275.6 Number of Holdings 47 Annual Portfolio Turnover 32.58% Total Advisory Fee $2.3
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 3.1 Mid Cap ($2.5-12 B) 52.2 Large Cap (>$12 B) 44.7 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 3.1% Mid Cap ($2.5-12 B) 52.2% Large Cap (>$12 B) 44.7% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Small/Mid Cap Growth Fund - Class R4
Shareholder Report [Line Items]
Class Name	CLASS: R4
Trading Symbol	TCGRX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Small/Mid Cap Growth Fund Class R4 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R4 $153.00 1.36%
Expenses Paid, Amount	$ 153
Expense Ratio, Percent	1.36%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R4 shares underperformed the Russell 2500 Growth Index - Total Return (the “Index”) during the 12-month period ended September 30, 2024. The Fund’s stock selection in the information technology and energy sectors had a positive impact on performance relative to the Index during the period. Stock selection in and underweight allocations to health care and consumer discretionary stocks detracted from relative results. Returns of mid-cap companies outpaced small-cap companies within the Index during the period. Stock selection was the primary detractor from performance within the mid-cap (those ranging from approximately $2.5 - $12 billion market capitalization) portion of the Fund’s portfolio. However, an underweight positioning in the Fund to smaller stocks (those under approximately $2.5 billion market capitalization) and an overweight positioning to larger stocks (those over approximately $12 billion market capitalization) within the Index’s universe had positive impacts on the Fund’s performance relative to the Index.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Small/Mid Cap Growth Fund Russell 2500 Growth Index - Total Return Russell 3000 Index - Total Return 09/30/2014 10000.0066 10000 10000 10/31/2014 10418.2435 10440.1539 10275.133 11/30/2014 10365.4929 10613.8136 10524.1387 12/31/2014 10342.8855 10748.8712 10524.0202 01/31/2015 10139.4189 10583.1968 10231.1204 02/28/2015 10712.1397 11362.1033 10823.5111 03/31/2015 10712.1397 11548.3692 10713.4813 04/30/2015 10723.4434 11308.2289 10761.9405 05/31/2015 10795.0335 11657.0691 10910.7933 06/30/2015 10825.1767 11618.9727 10728.2506 07/31/2015 10934.4458 11756.6519 10907.6844 08/31/2015 10218.5448 10932.9725 10249.1933 09/30/2015 9868.1301 10335.3979 9950.534 10/31/2015 10587.799 10875.4516 10736.4785 11/30/2015 10926.91 11121.7296 10795.9966 12/31/2015 10629.2459 10728.7855 10574.4045 01/31/2016 9400.9105 9667.8382 9977.7406 02/29/2016 9125.8538 9697.0839 9974.5274 03/31/2016 9864.3622 10443.495 10676.794 04/30/2016 9747.5573 10543.6262 10742.9652 05/31/2016 10018.8461 10805.4548 10935.16 06/30/2016 9762.6289 10725.3879 10957.6458 07/31/2016 10346.6534 11362.6518 11392.5207 08/31/2016 10504.9052 11441.5829 11421.5817 09/30/2016 10674.4607 11474.5198 11439.536 10/31/2016 10478.5299 10875.3738 11192.0343 11/30/2016 10561.4237 11668.1758 11692.9016 12/31/2016 10380.5645 11772.4747 11921.0671 01/31/2017 10923.1421 12051.3124 12145.4442 02/28/2017 11228.342 12416.8331 12597.1533 03/31/2017 11322.5395 12508.3392 12605.7226 04/30/2017 11605.132 12728.316 12739.3407 05/31/2017 11804.8307 12734.1543 12869.7154 06/30/2017 11895.2603 13024.4312 12985.8568 07/31/2017 12272.0503 13197.7486 13230.7044 08/31/2017 12125.1022 13223.521 13256.1965 09/30/2017 12279.5861 13776.9956 13579.4861 10/31/2017 12385.0873 14145.5599 13875.8204 11/30/2017 12626.2329 14612.0578 14297.1609 12/31/2017 12859.8427 14651.4962 14440.0596 01/31/2018 13786.7461 15382.9032 15201.2038 02/28/2018 13692.5486 14878.445 14640.8928 03/31/2018 13624.7264 15000.0019 14346.9915 04/30/2018 13835.7288 14904.7482 14401.5198 05/31/2018 14204.983 15697.7623 14808.0786 06/30/2018 14513.9508 15829.152 14904.9227 07/31/2018 14653.3631 16125.5881 15399.5545 08/31/2018 15512.4443 17214.9293 15940.3524 09/30/2018 15282.6024 16963.5247 15966.738 10/31/2018 13843.2646 14926.0048 14791.0638 11/30/2018 13685.0128 15207.8413 15087.3096 12/31/2018 12524.4996 13557.5089 13683.1425 01/31/2019 13922.3905 15172.0319 14857.6224 02/28/2019 14487.5755 16171.8137 15380.151 03/31/2019 14770.168 16131.6617 15604.728 04/30/2019 15629.2492 16696.3052 16227.8554 05/31/2019 14302.9484 15587.31 15177.7201 06/30/2019 15211.0123 16799.8243 16243.7537 07/31/2019 15542.5875 17062.034 16485.2181 08/31/2019 15064.0642 16577.3348 16149.1603 09/30/2019 14879.4371 16265.5525 16432.5919 10/31/2019 15116.8148 16682.9543 16786.3352 11/30/2019 15893.0861 17819.1862 17424.4142 12/31/2019 16137.1497 17984.6195 17927.5233 01/31/2020 16716.2835 18004.3493 17907.9411 02/29/2020 15938.5895 16783.1069 16441.7593 03/31/2020 14068.8147 13808.8142 14180.724 04/30/2020 16004.7762 16022.9423 16058.8224 05/31/2020 17580.8475 17696.2018 16917.6229 06/30/2020 18420.5915 18347.7442 17304.3924 07/31/2020 19500.2624 19351.8531 18286.9924 08/31/2020 20960.5069 20222.8453 19611.7831 09/30/2020 19980.1161 20067.4919 18897.6985 10/31/2020 19525.0824 20304.3825 18489.825 11/30/2020 21750.7629 23261.6193 20739.1715 12/31/2020 22840.9492 25262.836 21672.1852 01/31/2021 22836.5355 25968.988 21575.7888 02/28/2021 23264.6654 26784.6666 22250.1888 03/31/2021 21768.4177 25891.2666 23047.7 04/30/2021 23189.6323 26800.8006 24235.7902 05/31/2021 22209.7887 26055.8928 24346.427 06/30/2021 23207.2872 27454.0778 24946.7819 07/31/2021 23591.28 26859.9901 25368.648 08/31/2021 23789.8969 27531.9742 26092.107 09/30/2021 22889.5001 26484.4226 24921.4084 10/31/2021 24120.9252 27842.3583 26606.7068 11/30/2021 22090.7408 26407.8058 26201.7175 12/31/2021 21840.0844 26537.2003 27233.5057 01/31/2022 18574.9555 23036.1894 25631.1915 02/28/2022 18786.0346 23105.4685 24985.5606 03/31/2022 18588.148 23272.0162 25795.9975 04/30/2022 16101.373 20614.5915 23481.0071 05/31/2022 15303.2304 20114.1512 23449.5237 06/30/2022 13957.6015 18722.174 21487.7688 07/31/2022 15501.117 20858.2091 23503.707 08/31/2022 15237.2682 20461.7857 22626.5647 09/30/2022 14010.3713 18699.3733 20528.4243 10/31/2022 14808.5139 20218.9499 22211.8772 11/30/2022 15283.4417 20820.7972 23371.2533 12/31/2022 14379.7596 19581.585 22002.7861 01/31/2023 15586.8679 21541.5216 23518.1774 02/28/2023 15085.5551 21201.0069 22968.4935 03/31/2023 15316.4228 20862.9602 23582.6516 04/30/2023 15507.7132 20599.5155 23833.9098 05/31/2023 15494.5208 20576.9268 23926.6418 06/30/2023 17005.0552 22201.3119 25560.4836 07/31/2023 17209.538 22942.7346 26476.7444 08/31/2023 16952.2854 22008.7799 25965.6445 09/30/2023 16074.9881 20683.4408 24728.7907 10/31/2023 14590.8386 19247.8226 24073.2616 11/30/2023 15837.5242 20953.669 26318.0536 12/31/2023 17209.538 23288.4146 27714.0123 01/31/2024 17282.0964 22761.5874 28021.1577 02/29/2024 18964.1325 24605.9376 29537.9574 03/31/2024 19557.7923 25269.8333 30490.7763 04/30/2024 18330.8954 23386.8052 29149.1283 05/31/2024 19076.2682 24335.2077 30526.3399 06/30/2024 18983.9212 24204.6697 31471.3556 07/31/2024 19445.6566 25678.8142 32056.3767 08/31/2024 19960.1617 25480.0609 32754.2021 09/30/2024 20026.1239 25896.2783 33431.7499 Effective September 30, 2024, the Fund adopted the Russell 3000 Index – Total Return as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Russell 2500 Index—Total Return as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Small/Mid Cap Growth Fund Class R4 24.58% 6.12% 7.19% Russell 2500 Growth Index - Total Return 25.20% 9.75% 9.98% Russell 3000 Index - Total Return 35.19% 15.26% 12.83%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fcg/TCGRX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 275,600,000
Holdings Count | Holdings	47
Advisory Fees Paid, Amount	$ 2,300,000
Investment Company, Portfolio Turnover	32.58%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $275.6 Number of Holdings 47 Annual Portfolio Turnover 32.58% Total Advisory Fee $2.3
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 3.1 Mid Cap ($2.5-12 B) 52.2 Large Cap (>$12 B) 44.7 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 3.1% Mid Cap ($2.5-12 B) 52.2% Large Cap (>$12 B) 44.7% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Small/Mid Cap Growth Fund - Class R5
Shareholder Report [Line Items]
Class Name	CLASS: R5
Trading Symbol	THGRX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Small/Mid Cap Growth Fund Class R5 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R5 $107.00 0.95%
Expenses Paid, Amount	$ 107
Expense Ratio, Percent	0.95%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R5 shares underperformed the Russell 2500 Growth Index - Total Return (the “Index”) during the 12-month period ended September 30, 2024. The Fund’s stock selection in the information technology and energy sectors had a positive impact on performance relative to the Index during the period. Stock selection in and underweight allocations to health care and consumer discretionary stocks detracted from relative results. Returns of mid-cap companies outpaced small-cap companies within the Index during the period. Stock selection was the primary detractor from performance within the mid-cap (those ranging from approximately $2.5 - $12 billion market capitalization) portion of the Fund’s portfolio. However, an underweight positioning in the Fund to smaller stocks (those under approximately $2.5 billion market capitalization) and an overweight positioning to larger stocks (those over approximately $12 billion market capitalization) within the Index’s universe had positive impacts on the Fund’s performance relative to the Index.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Small/Mid Cap Growth Fund Russell 2500 Growth Index - Total Return Russell 3000 Index - Total Return 09/30/2014 10000.0068 10000 10000 10/31/2014 10419.8134 10440.1539 10275.133 11/30/2014 10373.1682 10613.8136 10524.1387 12/31/2014 10351.6396 10748.8712 10524.0202 01/31/2015 10150.7066 10583.1968 10231.1204 02/28/2015 10728.3891 11362.1033 10823.5111 03/31/2015 10731.9772 11548.3692 10713.4813 04/30/2015 10746.3296 11308.2289 10761.9405 05/31/2015 10821.6794 11657.0691 10910.7933 06/30/2015 10853.9723 11618.9727 10728.2506 07/31/2015 10968.7911 11756.6519 10907.6844 08/31/2015 10254.7612 10932.9725 10249.1933 09/30/2015 9906.7165 10335.3979 9950.534 10/31/2015 10631.5107 10875.4516 10736.4785 11/30/2015 10975.9673 11121.7296 10795.9966 12/31/2015 10678.1558 10728.7855 10574.4045 01/31/2016 9451.0291 9667.8382 9977.7406 02/29/2016 9174.7461 9697.0839 9974.5274 03/31/2016 9921.0689 10443.495 10676.794 04/30/2016 9809.8381 10543.6262 10742.9652 05/31/2016 10086.121 10805.4548 10935.16 06/30/2016 9831.3666 10725.3879 10957.6458 07/31/2016 10419.8134 11362.6518 11392.5207 08/31/2016 10584.8655 11441.5829 11421.5817 09/30/2016 10757.0938 11474.5198 11439.536 10/31/2016 10563.337 10875.3738 11192.0343 11/30/2016 10653.0392 11668.1758 11692.9016 12/31/2016 10473.6347 11772.4747 11921.0671 01/31/2017 11026.2006 12051.3124 12145.4442 02/28/2017 11338.3644 12416.8331 12597.1533 03/31/2017 11438.8309 12508.3392 12605.7226 04/30/2017 11725.8781 12728.316 12739.3407 05/31/2017 11930.3993 12734.1543 12869.7154 06/30/2017 12027.2777 13024.4312 12985.8568 07/31/2017 12411.2033 13197.7486 13230.7044 08/31/2017 12267.6797 13223.521 13256.1965 09/30/2017 12429.1438 13776.9956 13579.4861 10/31/2017 12540.3746 14145.5599 13875.8204 11/30/2017 12787.9528 14612.0578 14297.1609 12/31/2017 13031.9429 14651.4962 14440.0596 01/31/2018 13975.6105 15382.9032 15201.2038 02/28/2018 13882.3202 14878.445 14640.8928 03/31/2018 13814.1465 15000.0019 14346.9915 04/30/2018 14036.6081 14904.7482 14401.5198 05/31/2018 14416.9456 15697.7623 14808.0786 06/30/2018 14732.6975 15829.152 14904.9227 07/31/2018 14879.8092 16125.5881 15399.5545 08/31/2018 15762.4794 17214.9293 15940.3524 09/30/2018 15532.8416 16963.5247 15966.738 10/31/2018 14072.489 14926.0048 14791.0638 11/30/2018 13918.2011 15207.8413 15087.3096 12/31/2018 12741.3076 13557.5089 13683.1425 01/31/2019 14165.7793 15172.0319 14857.6224 02/28/2019 14747.0499 16171.8137 15380.151 03/31/2019 15041.2733 16131.6617 15604.728 04/30/2019 15920.3553 16696.3052 16227.8554 05/31/2019 14571.2335 15587.31 15177.7201 06/30/2019 15504.1369 16799.8243 16243.7537 07/31/2019 15845.0054 17062.034 16485.2181 08/31/2019 15364.2014 16577.3348 16149.1603 09/30/2019 15181.2088 16265.5525 16432.5919 10/31/2019 15428.787 16682.9543 16786.3352 11/30/2019 16225.7441 17819.1862 17424.4142 12/31/2019 16484.0411 17984.6195 17927.5233 01/31/2020 17074.9932 18004.3493 17907.9411 02/29/2020 16288.3616 16783.1069 16441.7593 03/31/2020 14382.4432 13808.8142 14180.724 04/30/2020 16366.6334 16022.9423 16058.8224 05/31/2020 17986.8596 17696.2018 16917.6229 06/30/2020 18851.763 18347.7442 17304.3924 07/31/2020 19967.1362 19351.8531 18286.9924 08/31/2020 21466.0412 20222.8453 19611.7831 09/30/2020 20468.0757 20067.4919 18897.6985 10/31/2020 20010.1857 20304.3825 18489.825 11/30/2020 22295.8598 23261.6193 20739.1715 12/31/2020 23421.6615 25262.836 21672.1852 01/31/2021 23429.97 25968.988 21575.7888 02/28/2021 23874.4748 26784.6666 22250.1888 03/31/2021 22345.7108 25891.2666 23047.7 04/30/2021 23812.161 26800.8006 24235.7902 05/31/2021 22815.141 26055.8928 24346.427 06/30/2021 23849.5492 27454.0778 24946.7819 07/31/2021 24252.5115 26859.9901 25368.648 08/31/2021 24464.3783 27531.9742 26092.107 09/30/2021 23546.289 26484.4226 24921.4084 10/31/2021 24821.6438 27842.3583 26606.7068 11/30/2021 22741.1534 26407.8058 26201.7175 12/31/2021 22485.0325 26537.2003 27233.5057 01/31/2022 19131.6356 23036.1894 25631.1915 02/28/2022 19357.975 23105.4685 24985.5606 03/31/2022 19161.4171 23272.0162 25795.9975 04/30/2022 16600.2081 20614.5915 23481.0071 05/31/2022 15784.195 20114.1512 23449.5237 06/30/2022 14402.3334 18722.174 21487.7688 07/31/2022 15998.6218 20858.2091 23503.707 08/31/2022 15730.5883 20461.7857 22626.5647 09/30/2022 14473.809 18699.3733 20528.4243 10/31/2022 15295.7784 20218.9499 22211.8772 11/30/2022 15796.1076 20820.7972 23371.2533 12/31/2022 14866.9248 19581.585 22002.7861 01/31/2023 16123.7041 21541.5216 23518.1774 02/28/2023 15605.506 21201.0069 22968.4935 03/31/2023 15849.7143 20862.9602 23582.6516 04/30/2023 16052.2285 20599.5155 23833.9098 05/31/2023 16046.2722 20576.9268 23926.6418 06/30/2023 17618.7354 22201.3119 25560.4836 07/31/2023 17839.1185 22942.7346 26476.7444 08/31/2023 17571.085 22008.7799 25965.6445 09/30/2023 16671.6837 20683.4408 24728.7907 10/31/2023 15134.9583 19247.8226 24073.2616 11/30/2023 16433.4317 20953.669 26318.0536 12/31/2023 17868.9 23288.4146 27714.0123 01/31/2024 17952.2882 22761.5874 28021.1577 02/29/2024 19703.4404 24605.9376 29537.9574 03/31/2024 20322.8956 25269.8333 30490.7763 04/30/2024 19054.2037 23386.8052 29149.1283 05/31/2024 19834.479 24335.2077 30526.3399 06/30/2024 19751.0908 24204.6697 31471.3556 07/31/2024 20233.5511 25678.8142 32056.3767 08/31/2024 20775.5744 25480.0609 32754.2021 09/30/2024 20858.9626 25896.2783 33431.7499 Effective September 30, 2024, the Fund adopted the Russell 3000 Index – Total Return as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Russell 2500 Index—Total Return as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Small/Mid Cap Growth Fund Class R5 25.12% 6.56% 7.63% Russell 2500 Growth Index - Total Return 25.20% 9.75% 9.98% Russell 3000 Index - Total Return 35.19% 15.26% 12.83%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fcg/THGRX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 275,600,000
Holdings Count | Holdings	47
Advisory Fees Paid, Amount	$ 2,300,000
Investment Company, Portfolio Turnover	32.58%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $275.6 Number of Holdings 47 Annual Portfolio Turnover 32.58% Total Advisory Fee $2.3
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 3.1 Mid Cap ($2.5-12 B) 52.2 Large Cap (>$12 B) 44.7 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 3.1% Mid Cap ($2.5-12 B) 52.2% Large Cap (>$12 B) 44.7% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Investment Income Builder Fund - Class A
Shareholder Report [Line Items]
Class Name	CLASS: A
Trading Symbol	TIBAX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Investment Income Builder Fund Class A Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $127.00 1.13%
Expenses Paid, Amount	$ 127
Expense Ratio, Percent	1.13%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class A shares underperformed the benchmark composed of 25% Bloomberg U.S. Aggregate Bond Total Return Index Value USD and 75% MSCI World Net Total Return USD Index (the “Blended Index”) during the 12-month period ended September 30, 2024. During the period, major world events included the ongoing Russian/Ukraine conflict, moderating inflation figures in the U.S., Mideast tensions, and upcoming political contests in the U.S. Despite the conflicting economic and geo-political signals, the S&P 500, the Bloomberg U.S. Aggregate Bond, and the MSCI ACWI indexes reported varying positive returns for the period, +36.3%, +11.6%, and +31.8%, respectively. In brief, most equities repriced higher due to a surprising level of economic strength and resilient corporate profits, while interest rates declined along with inflation rates, creating a more favorable backdrop for the economy. A general overweight positioning to equities and underweight positioning to fixed income boosted the Fund’s relative performance during the period. Within equities, the Fund’s focus on dividend paying firms was a source of underperformance versus the broad based MSCI World Index. This underperformance is common during periods such as the current reporting period when growth stocks are outperforming. Security selection within the information technology and energy sectors, along with an overweight positioning to Taiwan, boosted relative performance. Mostly, the Fund’s equity holdings were relative detractors across the various sectors. Stock selection within the U.S. was beneficial to relative performance, however, the overall underweight positioning to U.S. stocks hampered performance. Among its fixed income holdings, the Fund’s shorter duration positioning during the period detracted from relative performance as yields across the curve declined during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Investment Income Builder Fund Thornburg Investment Income Builder Fund’s Blended Index MSCI World Net Total Return USD Index Bloomberg U.S. Aggregate Total Return Value Index USD 09/30/2014 9548.9066 10000 10000 10000 10/31/2014 9560.472 10073.0867 10064.69 10098.2769 11/30/2014 9643.6575 10242.3546 10266.3941 10169.91 12/31/2014 9425.445 10120.8813 10100.8476 10179.4256 01/31/2015 9479.7737 10036.3974 9917.8235 10392.8789 02/28/2015 9838.9889 10453.8199 10498.8953 10295.1602 03/31/2015 9748.6944 10343.2268 10334.5512 10342.967 04/30/2015 10055.8788 10515.8799 10576.9224 10305.856 05/31/2015 9988.2825 10536.7172 10613.3579 10281.0356 06/30/2015 9742.1991 10324.242 10366.5728 10168.9318 07/31/2015 9875.8726 10481.1738 10552.6529 10239.6187 08/31/2015 9268.0964 9957.2209 9854.3359 10224.9146 09/30/2015 8859.9984 9698.6094 9490.8635 10294.0811 10/31/2015 9280.7869 10275.4309 10242.9602 10295.7875 11/30/2015 9195.971 10230.2994 10191.9941 10268.5908 12/31/2015 8919.4855 10087.1673 10012.846 10235.4031 01/31/2016 8639.9506 9669.277 9413.8342 10376.2558 02/29/2016 8577.6893 9632.4537 9343.7725 10449.8664 03/31/2016 9055.7193 10144.7832 9977.8307 10545.7404 04/30/2016 9190.4544 10274.9142 10135.7163 10586.2218 05/31/2016 9296.4935 10318.8548 10192.6431 10588.9383 06/30/2016 9279.9092 10278.4873 10078.4316 10779.1979 07/31/2016 9521.4657 10620.4196 10504.2293 10847.3436 08/31/2016 9605.195 10624.0038 10512.9592 10834.9414 09/30/2016 9599.4675 10664.7736 10568.8037 10828.5941 10/31/2016 9452.5016 10489.5834 10364.2659 10745.7655 11/30/2016 9561.0834 10540.6767 10513.2948 10491.5864 12/31/2016 9767.0867 10733.5596 10764.8605 10506.3861 01/31/2017 9799.5879 10933.1167 11024.6716 10527.0016 02/28/2017 9977.5625 11178.9791 11330.5349 10597.7522 03/31/2017 10129.2383 11266.8226 11451.2272 10592.197 04/30/2017 10181.5607 11413.6778 11620.783 10673.9358 05/31/2017 10412.4299 11616.7289 11866.6147 10756.0945 06/30/2017 10418.3077 11647.3279 11912.2713 10745.2712 07/31/2017 10637.9413 11868.9197 12197.361 10791.5097 08/31/2017 10630.5538 11908.0687 12214.5364 10888.3034 09/30/2017 10848.3625 12094.3409 12488.6825 10836.4459 10/31/2017 10847.1963 12267.5162 12724.6997 10842.724 11/30/2017 11116.7465 12462.9349 13000.4127 10828.8068 12/31/2017 11210.4843 12603.6423 13176.2249 10878.506 01/31/2018 11579.7753 13066.4582 13871.9304 10753.2186 02/28/2018 11031.3439 12629.5108 13297.2527 10651.2843 03/31/2018 10937.3901 12443.3 13007.4202 10719.5896 04/30/2018 11163.8188 12527.4041 13156.8892 10639.8655 05/31/2018 11025.345 12608.6325 13239.3369 10715.7993 06/30/2018 11024.6322 12600.2444 13233.0206 10702.6209 07/31/2018 11476.2682 12896.1549 13646.3345 10705.1619 08/31/2018 11299.2575 13036.5728 13815.1792 10774.0467 09/30/2018 11473.4082 13070.0277 13892.104 10704.6676 10/31/2018 11004.9345 12324.4287 12872.0373 10620.0741 11/30/2018 11197.727 12447.8246 13018.2615 10683.4727 12/31/2018 10692.1638 11795.1134 12028.3785 10879.7393 01/31/2019 11165.3008 12514.7251 12964.2573 10995.2773 02/28/2019 11325.6688 12795.1499 13354.0906 10988.9087 03/31/2019 11446.8494 12982.6158 13529.4894 11199.9166 04/30/2019 11803.3827 13328.7121 14009.2358 11202.782 05/31/2019 11190.5954 12811.0541 13200.8901 11401.6482 06/30/2019 11735.775 13484.4127 14070.7609 11544.8346 07/31/2019 11674.1254 13541.921 14140.4582 11570.2238 08/31/2019 11583.2064 13421.8997 13851.2213 11870.0302 09/30/2019 11949.6806 13618.2531 14145.9899 11806.8123 10/31/2019 12174.5335 13888.4201 14505.9686 11842.3764 11/30/2019 12257.6729 14176.7482 14909.9637 11836.3427 12/31/2019 12580.755 14492.8117 15356.6394 11828.0976 01/31/2020 12386.1866 14496.3784 15263.1682 12055.7234 02/29/2020 11526.9291 13642.6234 13973.0448 12272.7065 03/31/2020 9312.5587 12268.426 12123.8144 12200.4833 04/30/2020 10097.8433 13328.138 13448.2708 12417.3601 05/31/2020 10467.0317 13826.5465 14097.9331 12475.1769 06/30/2020 10687.2805 14122.6145 14470.8377 12553.758 07/31/2020 10934.8001 14682.0864 15163.1429 12741.2746 08/31/2020 11159.6535 15388.1891 16176.2576 12638.4313 09/30/2020 10780.8112 14987.9197 15618.1907 12631.4992 10/31/2020 10593.0346 14626.3723 15139.1022 12575.0965 11/30/2020 12078.6911 16064.8665 17074.8119 12698.4914 12/31/2020 12498.8485 16581.2227 17798.7274 12715.9864 01/31/2021 12695.1968 16427.9066 17621.8329 12624.817 02/28/2021 13128.5499 16684.314 18073.3803 12442.5048 03/31/2021 13570.861 17048.5724 18674.719 12287.1394 04/30/2021 13803.1149 17677.3262 19543.8431 12384.2096 05/31/2021 14132.9821 17882.752 19825.3813 12424.6696 06/30/2021 13977.523 18114.0665 20120.8745 12511.9637 07/31/2021 13993.3323 18408.0562 20481.2976 12651.8595 08/31/2021 14272.5108 18742.9043 20991.0431 12627.7727 09/30/2021 13894.1837 18118.6742 20119.4832 12518.4439 10/31/2021 14452.4358 18887.1147 21259.0619 12514.9938 11/30/2021 14295.1327 18590.6796 20793.2128 12552.0197 12/31/2021 15001.5348 19174.7125 21681.917 12519.9004 01/31/2022 15087.8288 18310.525 20534.7085 12250.172 02/28/2022 14647.893 17912.1323 20015.3596 12113.503 03/31/2022 14689.3904 18156.4024 20564.6499 11776.9683 04/30/2022 14017.2186 16852.9175 18856.2741 11330.0576 05/31/2022 14530.6992 16889.6563 18870.5558 11403.1101 06/30/2022 13423.3405 15726.1529 17235.9512 11224.2161 07/31/2022 13691.7097 16758.6665 18604.4217 11498.4738 08/31/2022 13312.9476 16114.7976 17826.6108 11173.5652 09/30/2022 12251.2618 14817.2114 16169.4523 10690.7981 10/31/2022 13012.7628 15567.2817 17330.6269 10552.327 11/30/2022 14095.4828 16522.2059 18535.6335 10940.3949 12/31/2022 13760.3738 15977.334 17748.4748 10891.0465 01/31/2023 14601.2351 16948.0856 19004.2874 11226.0979 02/28/2023 14537.0848 16532.9814 18547.4527 10935.8444 03/31/2023 14513.2809 17021.1245 19120.5636 11213.6426 04/30/2023 14892.0457 17270.692 19455.737 11281.6023 05/31/2023 14473.1294 17094.3629 19261.5027 11158.7602 06/30/2023 15013.9259 17854.4938 20426.3955 11118.9646 07/31/2023 15437.3 18301.2193 21112.5755 11111.2139 08/31/2023 15216.8431 17944.1406 20608.2862 11040.24 09/30/2023 14977.7232 17249.5813 19719.2775 10759.6881 10/31/2023 14701.453 16806.1446 19147.1067 10589.8898 11/30/2023 15573.9307 18178.1255 20942.1884 11069.4673 12/31/2023 16222.8636 19021.4164 21970.3293 11493.195 01/31/2024 16284.2824 19179.5571 22233.9831 11461.6339 02/29/2024 16314.9918 19721.6884 23176.6516 11299.6979 03/31/2024 17148.9407 20242.5314 23921.4297 11404.0404 04/30/2024 16918.6231 19550.778 23032.8744 11115.9877 05/31/2024 17580.0418 20288.3773 24061.3398 11304.4398 06/30/2024 17585.7243 20646.0169 24550.9362 11411.4668 07/31/2024 18248.5258 21039.4472 24983.5836 11678.0004 08/31/2024 18672.2149 21532.0945 25643.9116 11845.8158 09/30/2024 18696.1115 21899.9228 26113.5523 12004.424 Effective September 30, 2024, the Fund adopted the MSCI World Net Total Return USD Index and the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market indices that represent the overall applicable markets in which the Fund invests, and a Blended Benchmark, comprised of 25% Bloomberg U.S. Aggregate Bond Total Return Value USD and 75% MSCI World Net Total Return USD Index, as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Investment Income Builder Fund Class A (with sales charge) 19.24% 8.37% 6.46% Investment Income Builder Fund Class A (without sales charge) 24.85% 9.37% 6.95% MSCI World Net Total Return USD Index 32.43% 13.04% 10.07% Investment Income Builder Fund’s Blended Index 26.96% 9.97% 8.15% Bloomberg U.S. Aggregate Total Return Value Index USD 11.57% 0.33% 1.84%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment and assumes the deduction of the maximum sales charge associated with that investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fib/TIBAX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 13,932,000,000
Holdings Count | Holdings	341
Advisory Fees Paid, Amount	$ 87,800,000
Investment Company, Portfolio Turnover	24.81%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $13,932.0 Number of Holdings 341 Annual Portfolio Turnover 24.81% Total Advisory Fee $87.8
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Portfolio Composition (%) Foreign Equity 56.8 Domestic Equity 27.4 Domestic Corporate Bonds 4.5 Domestic Other Bonds 3.2 Foreign Bonds 2.8 Other Assets Less Liabilities 5.2 Portfolio Composition (%) Foreign Equity 56.8% Domestic Equity 27.4% Domestic Corporate Bonds 4.5% Domestic Other Bonds 3.2% Foreign Bonds 2.8% Other Assets Less Liabilities 5.2% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Investment Income Builder Fund - Class C
Shareholder Report [Line Items]
Class Name	CLASS: C
Trading Symbol	TIBCX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Investment Income Builder Fund Class C Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $212.00 1.89%
Expenses Paid, Amount	$ 212
Expense Ratio, Percent	1.89%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class C shares underperformed the benchmark composed of 25% Bloomberg U.S. Aggregate Bond Total Return Index Value USD and 75% MSCI World Net Total Return USD Index (the “Blended Index”) during the 12-month period ended September 30, 2024. During the period, major world events included the ongoing Russian/Ukraine conflict, moderating inflation figures in the U.S., Mideast tensions, and upcoming political contests in the U.S. Despite the conflicting economic and geo-political signals, the S&P 500, the Bloomberg U.S. Aggregate Bond, and the MSCI ACWI indexes reported varying positive returns for the period, +36.3%, +11.6%, and +31.8%, respectively. In brief, most equities repriced higher due to a surprising level of economic strength and resilient corporate profits, while interest rates declined along with inflation rates, creating a more favorable backdrop for the economy. A general overweight positioning to equities and underweight positioning to fixed income boosted the Fund’s relative performance during the period. Within equities, the Fund’s focus on dividend paying firms was a source of underperformance versus the broad based MSCI World Index. This underperformance is common during periods such as the current reporting period when growth stocks are outperforming. Security selection within the information technology and energy sectors, along with an overweight positioning to Taiwan, boosted relative performance. Mostly, the Fund’s equity holdings were relative detractors across the various sectors. Stock selection within the U.S. was beneficial to relative performance, however, the overall underweight positioning to U.S. stocks hampered performance. Among its fixed income holdings, the Fund’s shorter duration positioning during the period detracted from relative performance as yields across the curve declined during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Investment Income Builder Fund Thornburg Investment Income Builder Fund’s Blended Index MSCI World Net Total Return USD Index Bloomberg U.S. Aggregate Total Return Value Index USD 09/30/2014 10000.006 10000 10000 10000 10/31/2014 10006.1193 10073.0867 10064.69 10098.2769 11/30/2014 10087.3471 10242.3546 10266.3941 10169.91 12/31/2014 9853.8977 10120.8813 10100.8476 10179.4256 01/31/2015 9904.4979 10036.3974 9917.8235 10392.8789 02/28/2015 10274.4904 10453.8199 10498.8953 10295.1602 03/31/2015 10173.77 10343.2268 10334.5512 10342.967 04/30/2015 10488.1876 10515.8799 10576.9224 10305.856 05/31/2015 10410.955 10536.7172 10613.3579 10281.0356 06/30/2015 10148.3391 10324.242 10366.5728 10168.9318 07/31/2015 10281.4138 10481.1738 10552.6529 10239.6187 08/31/2015 9646.7727 9957.2209 9854.3359 10224.9146 09/30/2015 9211.3269 9698.6094 9490.8635 10294.0811 10/31/2015 9643.2547 10275.4309 10242.9602 10295.7875 11/30/2015 9549.368 10230.2994 10191.9941 10268.5908 12/31/2015 9257.5298 10087.1673 10012.846 10235.4031 01/31/2016 8961.9787 9669.277 9413.8342 10376.2558 02/29/2016 8892.486 9632.4537 9343.7725 10449.8664 03/31/2016 9383.1318 10144.7832 9977.8307 10545.7404 04/30/2016 9517.262 10274.9142 10135.7163 10586.2218 05/31/2016 9621.4687 10318.8548 10192.6431 10588.9383 06/30/2016 9598.0899 10278.4873 10078.4316 10779.1979 07/31/2016 9842.2199 10620.4196 10504.2293 10847.3436 08/31/2016 9922.7614 10624.0038 10512.9592 10834.9414 09/30/2016 9910.7573 10664.7736 10568.8037 10828.5941 10/31/2016 9753.1336 10489.5834 10364.2659 10745.7655 11/30/2016 9859.6668 10540.6767 10513.2948 10491.5864 12/31/2016 10062.4219 10733.5596 10764.8605 10506.3861 01/31/2017 10094.8963 10933.1167 11024.6716 10527.0016 02/28/2017 10267.7966 11178.9791 11330.5349 10597.7522 03/31/2017 10417.9102 11266.8226 11451.2272 10592.197 04/30/2017 10465.5773 11413.6778 11620.783 10673.9358 05/31/2017 10696.7363 11616.7289 11866.6147 10756.0945 06/30/2017 10701.5728 11647.3279 11912.2713 10745.2712 07/31/2017 10920.7351 11868.9197 12197.361 10791.5097 08/31/2017 10901.3841 11908.0687 12214.5364 10888.3034 09/30/2017 11118.7596 12094.3409 12488.6825 10836.4459 10/31/2017 11115.9404 12267.5162 12724.6997 10842.724 11/30/2017 11385.9106 12462.9349 13000.4127 10828.8068 12/31/2017 11470.7579 12603.6423 13176.2249 10878.506 01/31/2018 11841.7339 13066.4582 13871.9304 10753.2186 02/28/2018 11273.5209 12629.5108 13297.2527 10651.2843 03/31/2018 11169.7693 12443.3 13007.4202 10719.5896 04/30/2018 11394.2868 12527.4041 13156.8892 10639.8655 05/31/2018 11245.4687 12608.6325 13239.3369 10715.7993 06/30/2018 11238.0009 12600.2444 13233.0206 10702.6209 07/31/2018 11691.3999 12896.1549 13646.3345 10705.1619 08/31/2018 11503.3032 13036.5728 13815.1792 10774.0467 09/30/2018 11673.8413 13070.0277 13892.104 10704.6676 10/31/2018 11189.6791 12324.4287 12872.0373 10620.0741 11/30/2018 11379.0385 12447.8246 13018.2615 10683.4727 12/31/2018 10852.5217 11795.1134 12028.3785 10879.7393 01/31/2019 11332.1381 12514.7251 12964.2573 10995.2773 02/28/2019 11488.7509 12795.1499 13354.0906 10988.9087 03/31/2019 11604.5201 12982.6158 13529.4894 11199.9166 04/30/2019 11954.1198 13328.7121 14009.2358 11202.782 05/31/2019 11330.7055 12811.0541 13200.8901 11401.6482 06/30/2019 11871.2877 13484.4127 14070.7609 11544.8346 07/31/2019 11801.795 13541.921 14140.4582 11570.2238 08/31/2019 11702.82 13421.8997 13851.2213 11870.0302 09/30/2019 12067.1104 13618.2531 14145.9899 11806.8123 10/31/2019 12292.387 13888.4201 14505.9686 11842.3764 11/30/2019 12363.2446 14176.7482 14909.9637 11836.3427 12/31/2019 12682.6003 14492.8117 15356.6394 11828.0976 01/31/2020 12478.2018 14496.3784 15263.1682 12055.7234 02/29/2020 11603.4576 13642.6234 13973.0448 12272.7065 03/31/2020 9365.7033 12268.426 12123.8144 12200.4833 04/30/2020 10150.6172 13328.138 13448.2708 12417.3601 05/31/2020 10510.5864 13826.5465 14097.9331 12475.1769 06/30/2020 10726.1153 14122.6145 14470.8377 12553.758 07/31/2020 10974.1097 14682.0864 15163.1429 12741.2746 08/31/2020 11187.6785 15388.1891 16176.2576 12638.4313 09/30/2020 10806.6798 14987.9197 15618.1907 12631.4992 10/31/2020 10611.1234 14626.3723 15139.1022 12575.0965 11/30/2020 12095.7796 16064.8665 17074.8119 12698.4914 12/31/2020 12504.6796 16581.2227 17798.7274 12715.9864 01/31/2021 12692.8315 16427.9066 17621.8329 12624.817 02/28/2021 13119.1169 16684.314 18073.3803 12442.5048 03/31/2021 13553.3117 17048.5724 18674.719 12287.1394 04/30/2021 13776.7167 17677.3262 19543.8431 12384.2096 05/31/2021 14091.6048 17882.752 19825.3813 12424.6696 06/30/2021 13933.0645 18114.0665 20120.8745 12511.9637 07/31/2021 13939.6377 18408.0562 20481.2976 12651.8595 08/31/2021 14209.0203 18742.9043 20991.0431 12627.7727 09/30/2021 13822.7948 18118.6742 20119.4832 12518.4439 10/31/2021 14369.6496 18887.1147 21259.0619 12514.9938 11/30/2021 14203.4347 18590.6796 20793.2128 12552.0197 12/31/2021 14892.5591 19174.7125 21681.917 12519.9004 01/31/2022 14968.3749 18310.525 20534.7085 12250.172 02/28/2022 14521.9149 17912.1323 20015.3596 12113.503 03/31/2022 14559.5566 18156.4024 20564.6499 11776.9683 04/30/2022 13882.9367 16852.9175 18856.2741 11330.0576 05/31/2022 14377.1095 16889.6563 18870.5558 11403.1101 06/30/2022 13275.128 15726.1529 17235.9512 11224.2161 07/31/2022 13532.333 16758.6665 18604.4217 11498.4738 08/31/2022 13154.5961 16114.7976 17826.6108 11173.5652 09/30/2022 12090.2961 14817.2114 16169.4523 10690.7981 10/31/2022 12835.0987 15567.2817 17330.6269 10552.327 11/30/2022 13903.8525 16522.2059 18535.6335 10940.3949 12/31/2022 13565.2694 15977.334 17748.4748 10891.0465 01/31/2023 14379.9154 16948.0856 19004.2874 11226.0979 02/28/2023 14308.3826 16532.9814 18547.4527 10935.8444 03/31/2023 14275.1388 17021.1245 19120.5636 11213.6426 04/30/2023 14639.5661 17270.692 19455.737 11281.6023 05/31/2023 14217.8068 17094.3629 19261.5027 11158.7602 06/30/2023 14741.8045 17854.4938 20426.3955 11118.9646 07/31/2023 15145.3117 18301.2193 21112.5755 11111.2139 08/31/2023 14925.7105 17944.1406 20608.2862 11040.24 09/30/2023 14682.2229 17249.5813 19719.2775 10759.6881 10/31/2023 14401.606 16806.1446 19147.1067 10589.8898 11/30/2023 15249.129 18178.1255 20942.1884 11069.4673 12/31/2023 15871.1613 19021.4164 21970.3293 11493.195 01/31/2024 15920.874 19179.5571 22233.9831 11461.6339 02/29/2024 15941.1684 19721.6884 23176.6516 11299.6979 03/31/2024 16747.3006 20242.5314 23921.4297 11404.0404 04/30/2024 16511.4523 19550.778 23032.8744 11115.9877 05/31/2024 17147.567 20288.3773 24061.3398 11304.4398 06/30/2024 17142.4375 20646.0169 24550.9362 11411.4668 07/31/2024 17778.3772 21039.4472 24983.5836 11678.0004 08/31/2024 18180.728 21532.0945 25643.9116 11845.8158 09/30/2024 18186.007 21899.9228 26113.5523 12004.424 Effective September 30, 2024, the Fund adopted the MSCI World Net Total Return USD Index and the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market indices that represent the overall applicable markets in which the Fund invests, and a Blended Benchmark, comprised of 25% Bloomberg U.S. Aggregate Bond Total Return Value USD and 75% MSCI World Net Total Return USD Index, as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Investment Income Builder Fund Class C (with sales charge) 22.88% 8.55% 6.16% Investment Income Builder Fund Class C (without sales charge) 23.88% 8.55% 6.16% MSCI World Net Total Return USD Index 32.43% 13.04% 10.07% Investment Income Builder Fund’s Blended Index 26.96% 9.97% 8.15% Bloomberg U.S. Aggregate Total Return Value Index USD 11.57% 0.33% 1.84%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fib/TIBCX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 13,932,000,000
Holdings Count | Holdings	341
Advisory Fees Paid, Amount	$ 87,800,000
Investment Company, Portfolio Turnover	24.81%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $13,932.0 Number of Holdings 341 Annual Portfolio Turnover 24.81% Total Advisory Fee $87.8
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Portfolio Composition (%) Foreign Equity 56.8 Domestic Equity 27.4 Domestic Corporate Bonds 4.5 Domestic Other Bonds 3.2 Foreign Bonds 2.8 Other Assets Less Liabilities 5.2 Portfolio Composition (%) Foreign Equity 56.8% Domestic Equity 27.4% Domestic Corporate Bonds 4.5% Domestic Other Bonds 3.2% Foreign Bonds 2.8% Other Assets Less Liabilities 5.2% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Investment Income Builder Fund - Class I
Shareholder Report [Line Items]
Class Name	CLASS: I
Trading Symbol	TIBIX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Investment Income Builder Fund Class I Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $100.00 0.89%
Expenses Paid, Amount	$ 100
Expense Ratio, Percent	0.89%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class I shares underperformed the benchmark composed of 25% Bloomberg U.S. Aggregate Bond Total Return Index Value USD and 75% MSCI World Net Total Return USD Index (the “Blended Index”) during the 12-month period ended September 30, 2024. During the period, major world events included the ongoing Russian/Ukraine conflict, moderating inflation figures in the U.S., Mideast tensions, and upcoming political contests in the U.S. Despite the conflicting economic and geo-political signals, the S&P 500, the Bloomberg U.S. Aggregate Bond, and the MSCI ACWI indexes reported varying positive returns for the period, +36.3%, +11.6%, and +31.8%, respectively. In brief, most equities repriced higher due to a surprising level of economic strength and resilient corporate profits, while interest rates declined along with inflation rates, creating a more favorable backdrop for the economy. A general overweight positioning to equities and underweight positioning to fixed income boosted the Fund’s relative performance during the period. Within equities, the Fund’s focus on dividend paying firms was a source of underperformance versus the broad based MSCI World Index. This underperformance is common during periods such as the current reporting period when growth stocks are outperforming. Security selection within the information technology and energy sectors, along with an overweight positioning to Taiwan, boosted relative performance. Mostly, the Fund’s equity holdings were relative detractors across the various sectors. Stock selection within the U.S. was beneficial to relative performance, however, the overall underweight positioning to U.S. stocks hampered performance. Among its fixed income holdings, the Fund’s shorter duration positioning during the period detracted from relative performance as yields across the curve declined during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Investment Income Builder Fund Thornburg Investment Income Builder Fund’s Blended Index MSCI World Net Total Return USD Index Bloomberg U.S. Aggregate Total Return Value Index USD 09/30/2014 9999.996 10000 10000 10000 10/31/2014 10015.0382 10073.0867 10064.69 10098.2769 11/30/2014 10104.6021 10242.3546 10266.3941 10169.91 12/31/2014 9880.0996 10120.8813 10100.8476 10179.4256 01/31/2015 9939.5484 10036.3974 9917.8235 10392.8789 02/28/2015 10320.7348 10453.8199 10498.8953 10295.1602 03/31/2015 10224.9708 10343.2268 10334.5512 10342.967 04/30/2015 10552.489 10515.8799 10576.9224 10305.856 05/31/2015 10480.3197 10536.7172 10613.3579 10281.0356 06/30/2015 10226.7677 10324.242 10366.5728 10168.9318 07/31/2015 10369.0431 10481.1738 10552.6529 10239.6187 08/31/2015 9738.6443 9957.2209 9854.3359 10224.9146 09/30/2015 9311.1707 9698.6094 9490.8635 10294.0811 10/31/2015 9752.9734 10275.4309 10242.9602 10295.7875 11/30/2015 9667.2898 10230.2994 10191.9941 10268.5908 12/31/2015 9376.3208 10087.1673 10012.846 10235.4031 01/31/2016 9087.1284 9669.277 9413.8342 10376.2558 02/29/2016 9024.6026 9632.4537 9343.7725 10449.8664 03/31/2016 9526.4755 10144.7832 9977.8307 10545.7404 04/30/2016 9674.9104 10274.9142 10135.7163 10586.2218 05/31/2016 9788.5738 10318.8548 10192.6431 10588.9383 06/30/2016 9774.2417 10278.4873 10078.4316 10779.1979 07/31/2016 10029.6416 10620.4196 10504.2293 10847.3436 08/31/2016 10120.2395 10624.0038 10512.9592 10834.9414 09/30/2016 10122.1883 10664.7736 10568.8037 10828.5941 10/31/2016 9966.4467 10489.5834 10364.2659 10745.7655 11/30/2016 10082.9683 10540.6767 10513.2948 10491.5864 12/31/2016 10301.1495 10733.5596 10764.8605 10506.3861 01/31/2017 10343.3838 10933.1167 11024.6716 10527.0016 02/28/2017 10527.3713 11178.9791 11330.5349 10597.7522 03/31/2017 10689.3579 11266.8226 11451.2272 10592.197 04/30/2017 10752.3602 11413.6778 11620.783 10673.9358 05/31/2017 10997.5465 11616.7289 11866.6147 10756.0945 06/30/2017 11006.9238 11647.3279 11912.2713 10745.2712 07/31/2017 11245.849 11868.9197 12197.361 10791.5097 08/31/2017 11236.1982 11908.0687 12214.5364 10888.3034 09/30/2017 11468.091 12094.3409 12488.6825 10836.4459 10/31/2017 11475.7266 12267.5162 12724.6997 10842.724 11/30/2017 11762.1862 12462.9349 13000.4127 10828.8068 12/31/2017 11863.9209 12603.6423 13176.2249 10878.506 01/31/2018 12261.0001 13066.4582 13871.9304 10753.2186 02/28/2018 11676.6864 12629.5108 13297.2527 10651.2843 03/31/2018 11580.9958 12443.3 13007.4202 10719.5896 04/30/2018 11821.8151 12527.4041 13156.8892 10639.8655 05/31/2018 11679.1304 12608.6325 13239.3369 10715.7993 06/30/2018 11681.1752 12600.2444 13233.0206 10702.6209 07/31/2018 12164.618 12896.1549 13646.3345 10705.1619 08/31/2018 11981.2661 13036.5728 13815.1792 10774.0467 09/30/2018 12167.3558 13070.0277 13892.104 10704.6676 10/31/2018 11671.4541 12324.4287 12872.0373 10620.0741 11/30/2018 11882.7464 12447.8246 13018.2615 10683.4727 12/31/2018 11342.0757 11795.1134 12028.3785 10879.7393 01/31/2019 11854.4358 12514.7251 12964.2573 10995.2773 02/28/2019 12025.9286 12795.1499 13354.0906 10988.9087 03/31/2019 12156.7468 12982.6158 13529.4894 11199.9166 04/30/2019 12535.1532 13328.7121 14009.2358 11202.782 05/31/2019 11886.3101 12811.0541 13200.8901 11401.6482 06/30/2019 12463.8047 13484.4127 14070.7609 11544.8346 07/31/2019 12401.5645 13541.921 14140.4582 11570.2238 08/31/2019 12308.4714 13421.8997 13851.2213 11870.0302 09/30/2019 12703.3362 13618.2531 14145.9899 11806.8123 10/31/2019 12943.6047 13888.4201 14505.9686 11842.3764 11/30/2019 13034.3343 14176.7482 14909.9637 11836.3427 12/31/2019 13378.2285 14492.8117 15356.6394 11828.0976 01/31/2020 13175.9325 14496.3784 15263.1682 12055.7234 02/29/2020 12265.675 13642.6234 13973.0448 12272.7065 03/31/2020 9913.0529 12268.426 12123.8144 12200.4833 04/30/2020 10751.0129 13328.138 13448.2708 12417.3601 05/31/2020 11143.2836 13826.5465 14097.9331 12475.1769 06/30/2020 11378.1236 14122.6145 14470.8377 12553.758 07/31/2020 11648.271 14682.0864 15163.1429 12741.2746 08/31/2020 11888.4439 15388.1891 16176.2576 12638.4313 09/30/2020 11489.996 14987.9197 15618.1907 12631.4992 10/31/2020 11287.6059 14626.3723 15139.1022 12575.0965 11/30/2020 12873.4585 16064.8665 17074.8119 12698.4914 12/31/2020 13326.5779 16581.2227 17798.7274 12715.9864 01/31/2021 13537.2106 16427.9066 17621.8329 12624.817 02/28/2021 14004.6184 16684.314 18073.3803 12442.5048 03/31/2021 14475.7821 17048.5724 18674.719 12287.1394 04/30/2021 14724.7735 17677.3262 19543.8431 12384.2096 05/31/2021 15077.2848 17882.752 19825.3813 12424.6696 06/30/2021 14916.0284 18114.0665 20120.8745 12511.9637 07/31/2021 14936.785 18408.0562 20481.2976 12651.8595 08/31/2021 15242.9689 18742.9043 20991.0431 12627.7727 09/30/2021 14839.7713 18118.6742 20119.4832 12518.4439 10/31/2021 15441.3939 18887.1147 21259.0619 12514.9938 11/30/2021 15271.6518 18590.6796 20793.2128 12552.0197 12/31/2021 16030.4615 19174.7125 21681.917 12519.9004 01/31/2022 16125.843 18310.525 20534.7085 12250.172 02/28/2022 15656.155 17912.1323 20015.3596 12113.503 03/31/2022 15710.3024 18156.4024 20564.6499 11776.9683 04/30/2022 14993.759 16852.9175 18856.2741 11330.0576 05/31/2022 15542.2371 16889.6563 18870.5558 11403.1101 06/30/2022 14364.0028 15726.1529 17235.9512 11224.2161 07/31/2022 14652.417 16758.6665 18604.4217 11498.4738 08/31/2022 14253.6782 16114.7976 17826.6108 11173.5652 09/30/2022 13115.4337 14817.2114 16169.4523 10690.7981 10/31/2022 13934.7399 15567.2817 17330.6269 10552.327 11/30/2022 15102.1755 16522.2059 18535.6335 10940.3949 12/31/2022 14742.6691 15977.334 17748.4748 10891.0465 01/31/2023 15647.168 16948.0856 19004.2874 11226.0979 02/28/2023 15582.2263 16532.9814 18547.4527 10935.8444 03/31/2023 15560.9396 17021.1245 19120.5636 11213.6426 04/30/2023 15967.3867 17270.692 19455.737 11281.6023 05/31/2023 15518.4259 17094.3629 19261.5027 11158.7602 06/30/2023 16104.4 17854.4938 20426.3955 11118.9646 07/31/2023 16557.8746 18301.2193 21112.5755 11111.2139 08/31/2023 16327.1209 17944.1406 20608.2862 11040.24 09/30/2023 16076.0482 17249.5813 19719.2775 10759.6881 10/31/2023 15785.69 16806.1446 19147.1067 10589.8898 11/30/2023 16725.8946 18178.1255 20942.1884 11069.4673 12/31/2023 17420.7858 19021.4164 21970.3293 11493.195 01/31/2024 17490.3509 19179.5571 22233.9831 11461.6339 02/29/2024 17526.9209 19721.6884 23176.6516 11299.6979 03/31/2024 18420.0358 20242.5314 23921.4297 11404.0404 04/30/2024 18185.8363 19550.778 23032.8744 11115.9877 05/31/2024 18902.75 20288.3773 24061.3398 11304.4398 06/30/2024 18905.7536 20646.0169 24550.9362 11411.4668 07/31/2024 19624.7571 21039.4472 24983.5836 11678.0004 08/31/2024 20088.6877 21532.0945 25643.9116 11845.8158 09/30/2024 20111.2964 21899.9228 26113.5523 12004.424 Effective September 30, 2024, the Fund adopted the MSCI World Net Total Return USD Index and the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market indices that represent the overall applicable markets in which the Fund invests, and a Blended Benchmark, comprised of 25% Bloomberg U.S. Aggregate Bond Total Return Value USD and 75% MSCI World Net Total Return USD Index, as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Investment Income Builder Fund Class I 25.12% 9.62% 7.24% MSCI World Net Total Return USD Index 32.43% 13.04% 10.07% Investment Income Builder Fund’s Blended Index 26.96% 9.97% 8.15% Bloomberg U.S. Aggregate Total Return Value Index USD 11.57% 0.33% 1.84%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fib/TIBIX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 13,932,000,000
Holdings Count | Holdings	341
Advisory Fees Paid, Amount	$ 87,800,000
Investment Company, Portfolio Turnover	24.81%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $13,932.0 Number of Holdings 341 Annual Portfolio Turnover 24.81% Total Advisory Fee $87.8
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Portfolio Composition (%) Foreign Equity 56.8 Domestic Equity 27.4 Domestic Corporate Bonds 4.5 Domestic Other Bonds 3.2 Foreign Bonds 2.8 Other Assets Less Liabilities 5.2 Portfolio Composition (%) Foreign Equity 56.8% Domestic Equity 27.4% Domestic Corporate Bonds 4.5% Domestic Other Bonds 3.2% Foreign Bonds 2.8% Other Assets Less Liabilities 5.2% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Investment Income Builder Fund - Class R3
Shareholder Report [Line Items]
Class Name	CLASS: R3
Trading Symbol	TIBRX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Investment Income Builder Fund Class R3 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R3 $168.00 1.50%
Expenses Paid, Amount	$ 168
Expense Ratio, Percent	1.50%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R3 shares underperformed the benchmark composed of 25% Bloomberg U.S. Aggregate Bond Total Return Index Value USD and 75% MSCI World Net Total Return USD Index (the “Blended Index”) during the 12-month period ended September 30, 2024. During the period, major world events included the ongoing Russian/Ukraine conflict, moderating inflation figures in the U.S., Mideast tensions, and upcoming political contests in the U.S. Despite the conflicting economic and geo-political signals, the S&P 500, the Bloomberg U.S. Aggregate Bond, and the MSCI ACWI indexes reported varying positive returns for the period, +36.3%, +11.6%, and +31.8%, respectively. In brief, most equities repriced higher due to a surprising level of economic strength and resilient corporate profits, while interest rates declined along with inflation rates, creating a more favorable backdrop for the economy. A general overweight positioning to equities and underweight positioning to fixed income boosted the Fund’s relative performance during the period. Within equities, the Fund’s focus on dividend paying firms was a source of underperformance versus the broad based MSCI World Index. This underperformance is common during periods such as the current reporting period when growth stocks are outperforming. Security selection within the information technology and energy sectors, along with an overweight positioning to Taiwan, boosted relative performance. Mostly, the Fund’s equity holdings were relative detractors across the various sectors. Stock selection within the U.S. was beneficial to relative performance, however, the overall underweight positioning to U.S. stocks hampered performance. Among its fixed income holdings, the Fund’s shorter duration positioning during the period detracted from relative performance as yields across the curve declined during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Investment Income Builder Fund Thornburg Investment Income Builder Fund’s Blended Index MSCI World Net Total Return USD Index Bloomberg U.S. Aggregate Total Return Value Index USD 09/30/2014 10000.006 10000 10000 10000 10/31/2014 10009.4416 10073.0867 10064.69 10098.2769 11/30/2014 10093.9521 10242.3546 10266.3941 10169.91 12/31/2014 9867.8439 10120.8813 10100.8476 10179.4256 01/31/2015 9921.7967 10036.3974 9917.8235 10392.8789 02/28/2015 10295.28 10453.8199 10498.8953 10295.1602 03/31/2015 10197.9445 10343.2268 10334.5512 10342.967 04/30/2015 10516.3634 10515.8799 10576.9224 10305.856 05/31/2015 10437.791 10536.7172 10613.3579 10281.0356 06/30/2015 10177.8178 10324.242 10366.5728 10168.9318 07/31/2015 10319.5597 10481.1738 10552.6529 10239.6187 08/31/2015 9681.7097 9957.2209 9854.3359 10224.9146 09/30/2015 9252.9062 9698.6094 9490.8635 10294.0811 10/31/2015 9684.9384 10275.4309 10242.9602 10295.7875 11/30/2015 9593.8322 10230.2994 10191.9941 10268.5908 12/31/2015 9303.2182 10087.1673 10012.846 10235.4031 01/31/2016 9014.1358 9669.277 9413.8342 10376.2558 02/29/2016 8942.1722 9632.4537 9343.7725 10449.8664 03/31/2016 9438.4681 10144.7832 9977.8307 10545.7404 04/30/2016 9576.5062 10274.9142 10135.7163 10586.2218 05/31/2016 9684.5399 10318.8548 10192.6431 10588.9383 06/30/2016 9669.4684 10278.4873 10078.4316 10779.1979 07/31/2016 9913.5928 10620.4196 10504.2293 10847.3436 08/31/2016 9998.0618 10624.0038 10512.9592 10834.9414 09/30/2016 9994.2746 10664.7736 10568.8037 10828.5941 10/31/2016 9833.7343 10489.5834 10364.2659 10745.7655 11/30/2016 9949.3697 10540.6767 10513.2948 10491.5864 12/31/2016 10156.5649 10733.5596 10764.8605 10506.3861 01/31/2017 10187.6211 10933.1167 11024.6716 10527.0016 02/28/2017 10370.3021 11178.9791 11330.5349 10597.7522 03/31/2017 10525.2662 11266.8226 11451.2272 10592.197 04/30/2017 10576.8243 11413.6778 11620.783 10673.9358 05/31/2017 10813.8867 11616.7289 11866.6147 10756.0945 06/30/2017 10822.3355 11647.3279 11912.2713 10745.2712 07/31/2017 11047.5588 11868.9197 12197.361 10791.5097 08/31/2017 11031.7344 11908.0687 12214.5364 10888.3034 09/30/2017 11256.3063 12094.3409 12488.6825 10836.4459 10/31/2017 11257.2833 12267.5162 12724.6997 10842.724 11/30/2017 11534.1332 12462.9349 13000.4127 10828.8068 12/31/2017 11628.7046 12603.6423 13176.2249 10878.506 01/31/2018 12008.489 13066.4582 13871.9304 10753.2186 02/28/2018 11431.4595 12629.5108 13297.2527 10651.2843 03/31/2018 11330.391 12443.3 13007.4202 10719.5896 04/30/2018 11561.8758 12527.4041 13156.8892 10639.8655 05/31/2018 11414.7129 12608.6325 13239.3369 10715.7993 06/30/2018 11410.5553 12600.2444 13233.0206 10702.6209 07/31/2018 11879.8036 12896.1549 13646.3345 10705.1619 08/31/2018 11692.6186 13036.5728 13815.1792 10774.0467 09/30/2018 11869.5295 13070.0277 13892.104 10704.6676 10/31/2018 11381.3703 12324.4287 12872.0373 10620.0741 11/30/2018 11577.3645 12447.8246 13018.2615 10683.4727 12/31/2018 11045.7875 11795.1134 12028.3785 10879.7393 01/31/2019 11536.9214 12514.7251 12964.2573 10995.2773 02/28/2019 11699.4677 12795.1499 13354.0906 10988.9087 03/31/2019 11821.089 12982.6158 13529.4894 11199.9166 04/30/2019 12180.4392 13328.7121 14009.2358 11202.782 05/31/2019 11544.1891 12811.0541 13200.8901 11401.6482 06/30/2019 12103.7341 13484.4127 14070.7609 11544.8346 07/31/2019 12036.2058 13541.921 14140.4582 11570.2238 08/31/2019 11938.5933 13421.8997 13851.2213 11870.0302 09/30/2019 12312.8367 13618.2531 14145.9899 11806.8123 10/31/2019 12547.2979 13888.4201 14505.9686 11842.3764 11/30/2019 12624.3772 14176.7482 14909.9637 11836.3427 12/31/2019 12954.4395 14492.8117 15356.6394 11828.0976 01/31/2020 12750.6436 14496.3784 15263.1682 12055.7234 02/29/2020 11862.3432 13642.6234 13973.0448 12272.7065 03/31/2020 9583.4848 12268.426 12123.8144 12200.4833 04/30/2020 10387.7712 13328.138 13448.2708 12417.3601 05/31/2020 10757.5835 13826.5465 14097.9331 12475.1769 06/30/2020 10979.9412 14122.6145 14470.8377 12553.758 07/31/2020 11237.3037 14682.0864 15163.1429 12741.2746 08/31/2020 11459.6049 15388.1891 16176.2576 12638.4313 09/30/2020 11073.3377 14987.9197 15618.1907 12631.4992 10/31/2020 10871.168 14626.3723 15139.1022 12575.0965 11/30/2020 12394.1611 16064.8665 17074.8119 12698.4914 12/31/2020 12822.3205 16581.2227 17798.7274 12715.9864 01/31/2021 13019.618 16427.9066 17621.8329 12624.817 02/28/2021 13460.5217 16684.314 18073.3803 12442.5048 03/31/2021 13910.0734 17048.5724 18674.719 12287.1394 04/30/2021 14143.807 17677.3262 19543.8431 12384.2096 05/31/2021 14471.4661 17882.752 19825.3813 12424.6696 06/30/2021 14313.5607 18114.0665 20120.8745 12511.9637 07/31/2021 14325.2015 18408.0562 20481.2976 12651.8595 08/31/2021 14606.6222 18742.9043 20991.0431 12627.7727 09/30/2021 14214.9083 18118.6742 20119.4832 12518.4439 10/31/2021 14781.6842 18887.1147 21259.0619 12514.9938 11/30/2021 14615.9475 18590.6796 20793.2128 12552.0197 12/31/2021 15334.7247 19174.7125 21681.917 12519.9004 01/31/2022 15417.9876 18310.525 20534.7085 12250.172 02/28/2022 14957.3316 17912.1323 20015.3596 12113.503 03/31/2022 15001.1731 18156.4024 20564.6499 11776.9683 04/30/2022 14309.6825 16852.9175 18856.2741 11330.0576 05/31/2022 14829.6907 16889.6563 18870.5558 11403.1101 06/30/2022 13693.817 15726.1529 17235.9512 11224.2161 07/31/2022 13969.9137 16758.6665 18604.4217 11498.4738 08/31/2022 13579.0033 16114.7976 17826.6108 11173.5652 09/30/2022 12485.7363 14817.2114 16169.4523 10690.7981 10/31/2022 13258.3365 15567.2817 17330.6269 10552.327 11/30/2022 14364.9031 16522.2059 18535.6335 10940.3949 12/31/2022 14012.8564 15977.334 17748.4748 10891.0465 01/31/2023 14864.9815 16948.0856 19004.2874 11226.0979 02/28/2023 14795.3445 16532.9814 18547.4527 10935.8444 03/31/2023 14766.0417 17021.1245 19120.5636 11213.6426 04/30/2023 15147.1383 17270.692 19455.737 11281.6023 05/31/2023 14715.9906 17094.3629 19261.5027 11158.7602 06/30/2023 15261.9611 17854.4938 20426.3955 11118.9646 07/31/2023 15682.5467 18301.2193 21112.5755 11111.2139 08/31/2023 15460.1766 17944.1406 20608.2862 11040.24 09/30/2023 15212.5666 17249.5813 19719.2775 10759.6881 10/31/2023 14926.8567 16806.1446 19147.1067 10589.8898 11/30/2023 15808.8049 18178.1255 20942.1884 11069.4673 12/31/2023 16464.0442 19021.4164 21970.3293 11493.195 01/31/2024 16521.1202 19179.5571 22233.9831 11461.6339 02/29/2024 16540.4576 19721.6884 23176.6516 11299.6979 03/31/2024 17381.5617 20242.5314 23921.4297 11404.0404 04/30/2024 17149.5846 19550.778 23032.8744 11115.9877 05/31/2024 17815.068 20288.3773 24061.3398 11304.4398 06/30/2024 17815.544 20646.0169 24550.9362 11411.4668 07/31/2024 18474.6399 21039.4472 24983.5836 11678.0004 08/31/2024 18905.376 21532.0945 25643.9116 11845.8158 09/30/2024 18916.8624 21899.9228 26113.5523 12004.424 Effective September 30, 2024, the Fund adopted the MSCI World Net Total Return USD Index and the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market indices that represent the overall applicable markets in which the Fund invests, and a Blended Benchmark, comprised of 25% Bloomberg U.S. Aggregate Bond Total Return Value USD and 75% MSCI World Net Total Return USD Index, as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Investment Income Builder Fund Class R3 24.37% 8.97% 6.58% MSCI World Net Total Return USD Index 32.43% 13.04% 10.07% Investment Income Builder Fund’s Blended Index 26.96% 9.97% 8.15% Bloomberg U.S. Aggregate Total Return Value Index USD 11.57% 0.33% 1.84%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fib/TIBRX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 13,932,000,000
Holdings Count | Holdings	341
Advisory Fees Paid, Amount	$ 87,800,000
Investment Company, Portfolio Turnover	24.81%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $13,932.0 Number of Holdings 341 Annual Portfolio Turnover 24.81% Total Advisory Fee $87.8
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Portfolio Composition (%) Foreign Equity 56.8 Domestic Equity 27.4 Domestic Corporate Bonds 4.5 Domestic Other Bonds 3.2 Foreign Bonds 2.8 Other Assets Less Liabilities 5.2 Portfolio Composition (%) Foreign Equity 56.8% Domestic Equity 27.4% Domestic Corporate Bonds 4.5% Domestic Other Bonds 3.2% Foreign Bonds 2.8% Other Assets Less Liabilities 5.2% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Investment Income Builder Fund - Class R4
Shareholder Report [Line Items]
Class Name	CLASS: R4
Trading Symbol	TIBGX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Investment Income Builder Fund Class R4 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R4 $157.00 1.40%
Expenses Paid, Amount	$ 157
Expense Ratio, Percent	1.40%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R4 shares underperformed the benchmark composed of 25% Bloomberg U.S. Aggregate Bond Total Return Index Value USD and 75% MSCI World Net Total Return USD Index (the “Blended Index”) during the 12-month period ended September 30, 2024. During the period, major world events included the ongoing Russian/Ukraine conflict, moderating inflation figures in the U.S., Mideast tensions, and upcoming political contests in the U.S. Despite the conflicting economic and geo-political signals, the S&P 500, the Bloomberg U.S. Aggregate Bond, and the MSCI ACWI indexes reported varying positive returns for the period, +36.3%, +11.6%, and +31.8%, respectively. In brief, most equities repriced higher due to a surprising level of economic strength and resilient corporate profits, while interest rates declined along with inflation rates, creating a more favorable backdrop for the economy. A general overweight positioning to equities and underweight positioning to fixed income boosted the Fund’s relative performance during the period. Within equities, the Fund’s focus on dividend paying firms was a source of underperformance versus the broad based MSCI World Index. This underperformance is common during periods such as the current reporting period when growth stocks are outperforming. Security selection within the information technology and energy sectors, along with an overweight positioning to Taiwan, boosted relative performance. Mostly, the Fund’s equity holdings were relative detractors across the various sectors. Stock selection within the U.S. was beneficial to relative performance, however, the overall underweight positioning to U.S. stocks hampered performance. Among its fixed income holdings, the Fund’s shorter duration positioning during the period detracted from relative performance as yields across the curve declined during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Investment Income Builder Fund Thornburg Investment Income Builder Fund’s Blended Index MSCI World Net Total Return USD Index Bloomberg U.S. Aggregate Total Return Value Index USD 09/30/2014 9999.9913 10000 10000 10000 10/31/2014 10010.9472 10073.0867 10064.69 10098.2769 11/30/2014 10096.222 10242.3546 10266.3941 10169.91 12/31/2014 9866.8482 10120.8813 10100.8476 10179.4256 01/31/2015 9922.2234 10036.3974 9917.8235 10392.8789 02/28/2015 10296.0075 10453.8199 10498.8953 10295.1602 03/31/2015 10199.837 10343.2268 10334.5512 10342.967 04/30/2015 10518.8177 10515.8799 10576.9224 10305.856 05/31/2015 10446.1855 10536.7172 10613.3579 10281.0356 06/30/2015 10187.5272 10324.242 10366.5728 10168.9318 07/31/2015 10325.195 10481.1738 10552.6529 10239.6187 08/31/2015 9689.1576 9957.2209 9854.3359 10224.9146 09/30/2015 9257.162 9698.6094 9490.8635 10294.0811 10/31/2015 9694.4166 10275.4309 10242.9602 10295.7875 11/30/2015 9604.2517 10230.2994 10191.9941 10268.5908 12/31/2015 9309.728 10087.1673 10012.846 10235.4031 01/31/2016 9021.8168 9669.277 9413.8342 10376.2558 02/29/2016 8950.6571 9632.4537 9343.7725 10449.8664 03/31/2016 9452.3528 10144.7832 9977.8307 10545.7404 04/30/2016 9591.1249 10274.9142 10135.7163 10586.2218 05/31/2016 9699.9433 10318.8548 10192.6431 10588.9383 06/30/2016 9680.8757 10278.4873 10078.4316 10779.1979 07/31/2016 9930.9251 10620.4196 10504.2293 10847.3436 08/31/2016 10016.256 10624.0038 10512.9592 10834.9414 09/30/2016 10008.435 10664.7736 10568.8037 10828.5941 10/31/2016 9854.4669 10489.5834 10364.2659 10745.7655 11/30/2016 9965.9033 10540.6767 10513.2948 10491.5864 12/31/2016 10173.856 10733.5596 10764.8605 10506.3861 01/31/2017 10210.9566 10933.1167 11024.6716 10527.0016 02/28/2017 10389.4121 11178.9791 11330.5349 10597.7522 03/31/2017 10545.3999 11266.8226 11451.2272 10592.197 04/30/2017 10603.0659 11413.6778 11620.783 10673.9358 05/31/2017 10836.0541 11616.7289 11866.6147 10756.0945 06/30/2017 10845.491 11647.3279 11912.2713 10745.2712 07/31/2017 11071.8576 11868.9197 12197.361 10791.5097 08/31/2017 11057.0145 11908.0687 12214.5364 10888.3034 09/30/2017 11281.6141 12094.3409 12488.6825 10836.4459 10/31/2017 11283.6087 12267.5162 12724.6997 10842.724 11/30/2017 11561.73 12462.9349 13000.4127 10828.8068 12/31/2017 11657.3259 12603.6423 13176.2249 10878.506 01/31/2018 12038.5609 13066.4582 13871.9304 10753.2186 02/28/2018 11463.2128 12629.5108 13297.2527 10651.2843 03/31/2018 11363.0919 12443.3 13007.4202 10719.5896 04/30/2018 11595.9225 12527.4041 13156.8892 10639.8655 05/31/2018 11449.549 12608.6325 13239.3369 10715.7993 06/30/2018 11446.341 12600.2444 13233.0206 10702.6209 07/31/2018 11917.4423 12896.1549 13646.3345 10705.1619 08/31/2018 11731.0049 13036.5728 13815.1792 10774.0467 09/30/2018 11909.2065 13070.0277 13892.104 10704.6676 10/31/2018 11415.6334 12324.4287 12872.0373 10620.0741 11/30/2018 11618.4487 12447.8246 13018.2615 10683.4727 12/31/2018 11086.8085 11795.1134 12028.3785 10879.7393 01/31/2019 11580.0971 12514.7251 12964.2573 10995.2773 02/28/2019 11738.4323 12795.1499 13354.0906 10988.9087 03/31/2019 11861.3777 12982.6158 13529.4894 11199.9166 04/30/2019 12228.1575 13328.7121 14009.2358 11202.782 05/31/2019 11591.3588 12811.0541 13200.8901 11401.6482 06/30/2019 12153.2481 13484.4127 14070.7609 11544.8346 07/31/2019 12086.6049 13541.921 14140.4582 11570.2238 08/31/2019 11989.8066 13421.8997 13851.2213 11870.0302 09/30/2019 12366.1534 13618.2531 14145.9899 11806.8123 10/31/2019 12595.6753 13888.4201 14505.9686 11842.3764 11/30/2019 12678.6685 14176.7482 14909.9637 11836.3427 12/31/2019 13009.8618 14492.8117 15356.6394 11828.0976 01/31/2020 12805.6076 14496.3784 15263.1682 12055.7234 02/29/2020 11914.834 13642.6234 13973.0448 12272.7065 03/31/2020 9623.7673 12268.426 12123.8144 12200.4833 04/30/2020 10432.7111 13328.138 13448.2708 12417.3601 05/31/2020 10806.4143 13826.5465 14097.9331 12475.1769 06/30/2020 11037.8856 14122.6145 14470.8377 12553.758 07/31/2020 11290.9951 14682.0864 15163.1429 12741.2746 08/31/2020 11520.6355 15388.1891 16176.2576 12638.4313 09/30/2020 11128.0174 14987.9197 15618.1907 12631.4992 10/31/2020 10931.9951 14626.3723 15139.1022 12575.0965 11/30/2020 12461.7436 16064.8665 17074.8119 12698.4914 12/31/2020 12892.601 16581.2227 17798.7274 12715.9864 01/31/2021 13091.8974 16427.9066 17621.8329 12624.817 02/28/2021 13541.7074 16684.314 18073.3803 12442.5048 03/31/2021 13988.3525 17048.5724 18674.719 12287.1394 04/30/2021 14224.3187 17677.3262 19543.8431 12384.2096 05/31/2021 14560.6931 17882.752 19825.3813 12424.6696 06/30/2021 14403.441 18114.0665 20120.8745 12511.9637 07/31/2021 14410.2646 18408.0562 20481.2976 12651.8595 08/31/2021 14694.2805 18742.9043 20991.0431 12627.7727 09/30/2021 14308.2374 18118.6742 20119.4832 12518.4439 10/31/2021 14872.8186 18887.1147 21259.0619 12514.9938 11/30/2021 14707.6069 18590.6796 20793.2128 12552.0197 12/31/2021 15431.0224 19174.7125 21681.917 12519.9004 01/31/2022 15516.0883 18310.525 20534.7085 12250.172 02/28/2022 15060.6794 17912.1323 20015.3596 12113.503 03/31/2022 15106.1389 18156.4024 20564.6499 11776.9683 04/30/2022 14412.313 16852.9175 18856.2741 11330.0576 05/31/2022 14929.995 16889.6563 18870.5558 11403.1101 06/30/2022 13789.4405 15726.1529 17235.9512 11224.2161 07/31/2022 14068.3015 16758.6665 18604.4217 11498.4738 08/31/2022 13676.5094 16114.7976 17826.6108 11173.5652 09/30/2022 12578.1658 14817.2114 16169.4523 10690.7981 10/31/2022 13356.4231 15567.2817 17330.6269 10552.327 11/30/2022 14470.6032 16522.2059 18535.6335 10940.3949 12/31/2022 14124.3234 15977.334 17748.4748 10891.0465 01/31/2023 14982.8993 16948.0856 19004.2874 11226.0979 02/28/2023 14914.0484 16532.9814 18547.4527 10935.8444 03/31/2023 14879.3632 17021.1245 19120.5636 11213.6426 04/30/2023 15264.1266 17270.692 19455.737 11281.6023 05/31/2023 14831.6126 17094.3629 19261.5027 11158.7602 06/30/2023 15382.2693 17854.4938 20426.3955 11118.9646 07/31/2023 15813.3359 18301.2193 21112.5755 11111.2139 08/31/2023 15584.1462 17944.1406 20608.2862 11040.24 09/30/2023 15336.1357 17249.5813 19719.2775 10759.6881 10/31/2023 15049.9159 16806.1446 19147.1067 10589.8898 11/30/2023 15939.1455 18178.1255 20942.1884 11069.4673 12/31/2023 16600.0621 19021.4164 21970.3293 11493.195 01/31/2024 16659.0068 19179.5571 22233.9831 11461.6339 02/29/2024 16686.8027 19721.6884 23176.6516 11299.6979 03/31/2024 17535.3518 20242.5314 23921.4297 11404.0404 04/30/2024 17296.1908 19550.778 23032.8744 11115.9877 05/31/2024 17975.0457 20288.3773 24061.3398 11304.4398 06/30/2024 17969.9986 20646.0169 24550.9362 11411.4668 07/31/2024 18642.6955 21039.4472 24983.5836 11678.0004 08/31/2024 19078.2752 21532.0945 25643.9116 11845.8158 09/30/2024 19091.4807 21899.9228 26113.5523 12004.424 Effective September 30, 2024, the Fund adopted the MSCI World Net Total Return USD Index and the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market indices that represent the overall applicable markets in which the Fund invests, and a Blended Benchmark, comprised of 25% Bloomberg U.S. Aggregate Bond Total Return Value USD and 75% MSCI World Net Total Return USD Index, as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Investment Income Builder Fund Class R4 24.51% 9.07% 6.68% MSCI World Net Total Return USD Index 32.43% 13.04% 10.07% Investment Income Builder Fund’s Blended Index 26.96% 9.97% 8.15% Bloomberg U.S. Aggregate Total Return Value Index USD 11.57% 0.33% 1.84%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fib/TIBGX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 13,932,000,000
Holdings Count | Holdings	341
Advisory Fees Paid, Amount	$ 87,800,000
Investment Company, Portfolio Turnover	24.81%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $13,932.0 Number of Holdings 341 Annual Portfolio Turnover 24.81% Total Advisory Fee $87.8
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Portfolio Composition (%) Foreign Equity 56.8 Domestic Equity 27.4 Domestic Corporate Bonds 4.5 Domestic Other Bonds 3.2 Foreign Bonds 2.8 Other Assets Less Liabilities 5.2 Portfolio Composition (%) Foreign Equity 56.8% Domestic Equity 27.4% Domestic Corporate Bonds 4.5% Domestic Other Bonds 3.2% Foreign Bonds 2.8% Other Assets Less Liabilities 5.2% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Investment Income Builder Fund - Class R5
Shareholder Report [Line Items]
Class Name	CLASS: R5
Trading Symbol	TIBMX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Investment Income Builder Fund Class R5 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R5 $111.00 0.99%
Expenses Paid, Amount	$ 111
Expense Ratio, Percent	0.99%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R5 shares underperformed the benchmark composed of 25% Bloomberg U.S. Aggregate Bond Total Return Index Value USD and 75% MSCI World Net Total Return USD Index (the “Blended Index”) during the 12-month period ended September 30, 2024. During the period, major world events included the ongoing Russian/Ukraine conflict, moderating inflation figures in the U.S., Mideast tensions, and upcoming political contests in the U.S. Despite the conflicting economic and geo-political signals, the S&P 500, the Bloomberg U.S. Aggregate Bond, and the MSCI ACWI indexes reported varying positive returns for the period, +36.3%, +11.6%, and +31.8%, respectively. In brief, most equities repriced higher due to a surprising level of economic strength and resilient corporate profits, while interest rates declined along with inflation rates, creating a more favorable backdrop for the economy. A general overweight positioning to equities and underweight positioning to fixed income boosted the Fund’s relative performance during the period. Within equities, the Fund’s focus on dividend paying firms was a source of underperformance versus the broad based MSCI World Index. This underperformance is common during periods such as the current reporting period when growth stocks are outperforming. Security selection within the information technology and energy sectors, along with an overweight positioning to Taiwan, boosted relative performance. Mostly, the Fund’s equity holdings were relative detractors across the various sectors. Stock selection within the U.S. was beneficial to relative performance, however, the overall underweight positioning to U.S. stocks hampered performance. Among its fixed income holdings, the Fund’s shorter duration positioning during the period detracted from relative performance as yields across the curve declined during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Investment Income Builder Fund Thornburg Investment Income Builder Fund’s Blended Index MSCI World Net Total Return USD Index Bloomberg U.S. Aggregate Total Return Value Index USD 09/30/2014 9999.9997 10000 10000 10000 10/31/2014 10013.9552 10073.0867 10064.69 10098.2769 11/30/2014 10102.4859 10242.3546 10266.3941 10169.91 12/31/2014 9876.909 10120.8813 10100.8476 10179.4256 01/31/2015 9935.0788 10036.3974 9917.8235 10392.8789 02/28/2015 10310.7956 10453.8199 10498.8953 10295.1602 03/31/2015 10218.7232 10343.2268 10334.5512 10342.967 04/30/2015 10540.2516 10515.8799 10576.9224 10305.856 05/31/2015 10471.5365 10536.7172 10613.3579 10281.0356 06/30/2015 10216.9656 10324.242 10366.5728 10168.9318 07/31/2015 10358.0862 10481.1738 10552.6529 10239.6187 08/31/2015 9722.0901 9957.2209 9854.3359 10224.9146 09/30/2015 9298.8397 9698.6094 9490.8635 10294.0811 10/31/2015 9739.2498 10275.4309 10242.9602 10295.7875 11/30/2015 9647.7069 10230.2994 10191.9941 10268.5908 12/31/2015 9361.0105 10087.1673 10012.846 10235.4031 01/31/2016 9071.2438 9669.277 9413.8342 10376.2558 02/29/2016 9003.0659 9632.4537 9343.7725 10449.8664 03/31/2016 9508.3141 10144.7832 9977.8307 10545.7404 04/30/2016 9655.5437 10274.9142 10135.7163 10586.2218 05/31/2016 9767.9535 10318.8548 10192.6431 10588.9383 06/30/2016 9752.4934 10278.4873 10078.4316 10779.1979 07/31/2016 10006.5131 10620.4196 10504.2293 10847.3436 08/31/2016 10095.6688 10624.0038 10512.9592 10834.9414 09/30/2016 10091.3657 10664.7736 10568.8037 10828.5941 10/31/2016 9939.9947 10489.5834 10364.2659 10745.7655 11/30/2016 10055.2761 10540.6767 10513.2948 10491.5864 12/31/2016 10272.0974 10733.5596 10764.8605 10506.3861 01/31/2017 10307.9827 10933.1167 11024.6716 10527.0016 02/28/2017 10495.6906 11178.9791 11330.5349 10597.7522 03/31/2017 10656.1518 11266.8226 11451.2272 10592.197 04/30/2017 10717.828 11413.6778 11620.783 10673.9358 05/31/2017 10955.9189 11616.7289 11866.6147 10756.0945 06/30/2017 10969.2181 11647.3279 11912.2713 10745.2712 07/31/2017 11201.0082 11868.9197 12197.361 10791.5097 08/31/2017 11195.348 11908.0687 12214.5364 10888.3034 09/30/2017 11425.4374 12094.3409 12488.6825 10836.4459 10/31/2017 11426.3984 12267.5162 12724.6997 10842.724 11/30/2017 11715.8471 12462.9349 13000.4127 10828.8068 12/31/2017 11810.592 12603.6423 13176.2249 10878.506 01/31/2018 12204.6409 13066.4582 13871.9304 10753.2186 02/28/2018 11627.3074 12629.5108 13297.2527 10651.2843 03/31/2018 11530.8571 12443.3 13007.4202 10719.5896 04/30/2018 11769.9233 12527.4041 13156.8892 10639.8655 05/31/2018 11626.5472 12608.6325 13239.3369 10715.7993 06/30/2018 11627.3401 12600.2444 13233.0206 10702.6209 07/31/2018 12107.4497 12896.1549 13646.3345 10705.1619 08/31/2018 11918.0132 13036.5728 13815.1792 10774.0467 09/30/2018 12107.7136 13070.0277 13892.104 10704.6676 10/31/2018 11612.8303 12324.4287 12872.0373 10620.0741 11/30/2018 11816.5228 12447.8246 13018.2615 10683.4727 12/31/2018 11282.7389 11795.1134 12028.3785 10879.7393 01/31/2019 11786.0162 12514.7251 12964.2573 10995.2773 02/28/2019 11955.6598 12795.1499 13354.0906 10988.9087 03/31/2019 12084.5463 12982.6158 13529.4894 11199.9166 04/30/2019 12460.1008 13328.7121 14009.2358 11202.782 05/31/2019 11819.156 12811.0541 13200.8901 11401.6482 06/30/2019 12392.7715 13484.4127 14070.7609 11544.8346 07/31/2019 12329.6632 13541.921 14140.4582 11570.2238 08/31/2019 12235.9664 13421.8997 13851.2213 11870.0302 09/30/2019 12621.8612 13618.2531 14145.9899 11806.8123 10/31/2019 12865.7295 13888.4201 14505.9686 11842.3764 11/30/2019 12955.0973 14176.7482 14909.9637 11836.3427 12/31/2019 13296.2372 14492.8117 15356.6394 11828.0976 01/31/2020 13093.9577 14496.3784 15263.1682 12055.7234 02/29/2020 12181.9675 13642.6234 13973.0448 12272.7065 03/31/2020 9847.4647 12268.426 12123.8144 12200.4833 04/30/2020 10678.4518 13328.138 13448.2708 12417.3601 05/31/2020 11068.2429 13826.5465 14097.9331 12475.1769 06/30/2020 11301.7282 14122.6145 14470.8377 12553.758 07/31/2020 11569.6926 14682.0864 15163.1429 12741.2746 08/31/2020 11807.8315 15388.1891 16176.2576 12638.4313 09/30/2020 11411.6891 14987.9197 15618.1907 12631.4992 10/31/2020 11210.0871 14626.3723 15139.1022 12575.0965 11/30/2020 12785.4679 16064.8665 17074.8119 12698.4914 12/31/2020 13229.022 16581.2227 17798.7274 12715.9864 01/31/2021 13437.3976 16427.9066 17621.8329 12624.817 02/28/2021 13900.9587 16684.314 18073.3803 12442.5048 03/31/2021 14368.1076 17048.5724 18674.719 12287.1394 04/30/2021 14614.1968 17677.3262 19543.8431 12384.2096 05/31/2021 14963.0529 17882.752 19825.3813 12424.6696 06/30/2021 14807.781 18114.0665 20120.8745 12511.9637 07/31/2021 14820.2413 18408.0562 20481.2976 12651.8595 08/31/2021 15122.396 18742.9043 20991.0431 12627.7727 09/30/2021 14726.5754 18118.6742 20119.4832 12518.4439 10/31/2021 15316.2302 18887.1147 21259.0619 12514.9938 11/30/2021 15152.7308 18590.6796 20793.2128 12552.0197 12/31/2021 15898.3757 19174.7125 21681.917 12519.9004 01/31/2022 15991.3344 18310.525 20534.7085 12250.172 02/28/2022 15523.5719 17912.1323 20015.3596 12113.503 03/31/2022 15575.83 18156.4024 20564.6499 11776.9683 04/30/2022 14869.9065 16852.9175 18856.2741 11330.0576 05/31/2022 15406.2443 16889.6563 18870.5558 11403.1101 06/30/2022 14235.7303 15726.1529 17235.9512 11224.2161 07/31/2022 14527.1976 16758.6665 18604.4217 11498.4738 08/31/2022 14130.361 16114.7976 17826.6108 11173.5652 09/30/2022 13000.2926 14817.2114 16169.4523 10690.7981 10/31/2022 13804.9468 15567.2817 17330.6269 10552.327 11/30/2022 14961.5789 16522.2059 18535.6335 10940.3949 12/31/2022 14610.5504 15977.334 17748.4748 10891.0465 01/31/2023 15505.9703 16948.0856 19004.2874 11226.0979 02/28/2023 15433.4646 16532.9814 18547.4527 10935.8444 03/31/2023 15410.7994 17021.1245 19120.5636 11213.6426 04/30/2023 15812.355 17270.692 19455.737 11281.6023 05/31/2023 15365.8822 17094.3629 19261.5027 11158.7602 06/30/2023 15945.2717 17854.4938 20426.3955 11118.9646 07/31/2023 16393.6472 18301.2193 21112.5755 11111.2139 08/31/2023 16170.4089 17944.1406 20608.2862 11040.24 09/30/2023 15913.2156 17249.5813 19719.2775 10759.6881 10/31/2023 15623.982 16806.1446 19147.1067 10589.8898 11/30/2023 16554.0219 18178.1255 20942.1884 11069.4673 12/31/2023 17241.0684 19021.4164 21970.3293 11493.195 01/31/2024 17308.2345 19179.5571 22233.9831 11461.6339 02/29/2024 17342.831 19721.6884 23176.6516 11299.6979 03/31/2024 18232.9334 20242.5314 23921.4297 11404.0404 04/30/2024 17992.1011 19550.778 23032.8744 11115.9877 05/31/2024 18700.3172 20288.3773 24061.3398 11304.4398 06/30/2024 18701.6538 20646.0169 24550.9362 11411.4668 07/31/2024 19411.7437 21039.4472 24983.5836 11678.0004 08/31/2024 19869.2931 21532.0945 25643.9116 11845.8158 09/30/2024 19889.9942 21899.9228 26113.5523 12004.424 Effective September 30, 2024, the Fund adopted the MSCI World Net Total Return USD Index and the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market indices that represent the overall applicable markets in which the Fund invests, and a Blended Benchmark, comprised of 25% Bloomberg U.S. Aggregate Bond Total Return Value USD and 75% MSCI World Net Total Return USD Index, as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Investment Income Builder Fund Class R5 25.01% 9.52% 7.12% MSCI World Net Total Return USD Index 32.43% 13.04% 10.07% Investment Income Builder Fund’s Blended Index 26.96% 9.97% 8.15% Bloomberg U.S. Aggregate Total Return Value Index USD 11.57% 0.33% 1.84%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fib/TIBMX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 13,932,000,000
Holdings Count | Holdings	341
Advisory Fees Paid, Amount	$ 87,800,000
Investment Company, Portfolio Turnover	24.81%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $13,932.0 Number of Holdings 341 Annual Portfolio Turnover 24.81% Total Advisory Fee $87.8
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Portfolio Composition (%) Foreign Equity 56.8 Domestic Equity 27.4 Domestic Corporate Bonds 4.5 Domestic Other Bonds 3.2 Foreign Bonds 2.8 Other Assets Less Liabilities 5.2 Portfolio Composition (%) Foreign Equity 56.8% Domestic Equity 27.4% Domestic Corporate Bonds 4.5% Domestic Other Bonds 3.2% Foreign Bonds 2.8% Other Assets Less Liabilities 5.2% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Investment Income Builder Fund - Class R6
Shareholder Report [Line Items]
Class Name	CLASS: R6
Trading Symbol	TIBOX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Investment Income Builder Fund Class R6 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R6 $90.00 0.80%
Expenses Paid, Amount	$ 90
Expense Ratio, Percent	0.80%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R6 shares underperformed the benchmark composed of 25% Bloomberg U.S. Aggregate Bond Total Return Index Value USD and 75% MSCI World Net Total Return USD Index (the “Blended Index”) during the 12-month period ended September 30, 2024. During the period, major world events included the ongoing Russian/Ukraine conflict, moderating inflation figures in the U.S., Mideast tensions, and upcoming political contests in the U.S. Despite the conflicting economic and geo-political signals, the S&P 500, the Bloomberg U.S. Aggregate Bond, and the MSCI ACWI indexes reported varying positive returns for the period, +36.3%, +11.6%, and +31.8%, respectively. In brief, most equities repriced higher due to a surprising level of economic strength and resilient corporate profits, while interest rates declined along with inflation rates, creating a more favorable backdrop for the economy. A general overweight positioning to equities and underweight positioning to fixed income boosted the Fund’s relative performance during the period. Within equities, the Fund’s focus on dividend paying firms was a source of underperformance versus the broad based MSCI World Index. This underperformance is common during periods such as the current reporting period when growth stocks are outperforming. Security selection within the information technology and energy sectors, along with an overweight positioning to Taiwan, boosted relative performance. Mostly, the Fund’s equity holdings were relative detractors across the various sectors. Stock selection within the U.S. was beneficial to relative performance, however, the overall underweight positioning to U.S. stocks hampered performance. Among its fixed income holdings, the Fund’s shorter duration positioning during the period detracted from relative performance as yields across the curve declined during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Investment Income Builder Fund Thornburg Investment Income Builder Fund’s Blended Index MSCI World Net Total Return USD Index Bloomberg U.S. Aggregate Total Return Value Index USD 04/10/2017 9999.9999 10000 10000 10000 04/30/2017 10106.7258 10147.8431 10179.5324 10052.775 05/31/2017 10319.7344 10328.3747 10394.8752 10130.1526 06/30/2017 10330.8459 10355.5801 10434.8693 10119.9591 07/31/2017 10550.3568 10552.5963 10684.6012 10163.5068 08/31/2017 10546.5907 10587.4035 10699.6464 10254.6677 09/30/2017 10765.3118 10753.0171 10939.792 10205.8279 10/31/2017 10767.8542 10906.9864 11146.5375 10211.7408 11/30/2017 11037.9072 11080.7322 11388.0556 10198.6334 12/31/2017 11133.8625 11205.8345 11542.0629 10245.4405 01/31/2018 11508.1253 11617.3217 12151.4846 10127.444 02/28/2018 10963.3852 11228.834 11648.0804 10031.4417 03/31/2018 10874.094 11063.275 11394.194 10095.772 04/30/2018 11101.5887 11138.0515 11525.1253 10020.6874 05/31/2018 10967.6872 11210.2712 11597.3475 10092.2023 06/30/2018 10969.9822 11202.8134 11591.8146 10079.7908 07/31/2018 11425.9234 11465.9059 11953.8679 10082.184 08/31/2018 11253.6029 11590.7507 12101.7718 10147.06 09/30/2018 11429.5047 11620.4953 12169.1561 10081.7184 10/31/2018 10962.689 10957.587 11275.6018 10002.0477 11/30/2018 11162.3193 11067.2977 11403.6907 10061.7569 12/31/2018 10653.1376 10486.9755 10536.5765 10246.602 01/31/2019 11136.6211 11126.7786 11356.3843 10355.4163 02/28/2019 11298.7679 11376.1029 11697.8691 10349.4183 03/31/2019 11422.6767 11542.7779 11851.5143 10548.1468 04/30/2019 11780.0583 11850.4903 12271.7608 10550.8454 05/31/2019 11169.0867 11390.2432 11563.669 10738.1388 06/30/2019 11714.1952 11988.9229 12325.6554 10872.9926 07/31/2019 11656.1272 12040.0533 12386.7086 10896.9043 08/31/2019 11568.9393 11933.3429 12133.3439 11179.2637 09/30/2019 11941.9168 12107.9198 12391.5543 11119.7248 10/31/2019 12169.0164 12348.1238 12706.8871 11153.2192 11/30/2019 12255.0274 12604.4749 13060.7773 11147.5366 12/31/2019 12579.7115 12885.4854 13452.0547 11139.7713 01/31/2020 12389.3692 12888.6565 13370.1761 11354.1506 02/29/2020 11531.2498 12129.5873 12240.0584 11558.5066 03/31/2020 9323.8413 10907.7954 10620.1761 11490.4864 04/30/2020 10115.6169 11849.9799 11780.3687 11694.7422 05/31/2020 10481.6037 12293.1124 12349.4576 11749.1944 06/30/2020 10704.6086 12556.3449 12676.1133 11823.2026 07/31/2020 10960.7336 13053.7686 13282.5563 11999.8067 08/31/2020 11188.5453 13681.5609 14170.0209 11902.9483 09/30/2020 10813.7157 13325.6834 13681.1675 11896.4197 10/31/2020 10623.8586 13004.2334 13261.4973 11843.2992 11/30/2020 12122.106 14283.1914 14957.1333 11959.5133 12/31/2020 12545.0622 14742.281 15591.2664 11975.9902 01/31/2021 12745.1167 14605.9684 15436.3109 11890.1263 02/28/2021 13187.5477 14833.939 15831.8558 11718.4236 03/31/2021 13627.7088 15157.7992 16358.6144 11572.0996 04/30/2021 13869.653 15716.821 17119.9466 11663.5208 05/31/2021 14197.5476 15899.4641 17366.5674 11701.6264 06/30/2021 14051.8675 16105.1246 17625.4125 11783.8404 07/31/2021 14071.7884 16366.5094 17941.1347 11915.5951 08/31/2021 14355.3864 16664.2212 18387.6598 11892.91 09/30/2021 13980.8672 16109.2214 17624.1938 11789.9435 10/31/2021 14544.2438 16792.4379 18622.4379 11786.6942 11/30/2021 14390.7518 16528.879 18214.365 11821.5654 12/31/2021 15102.3635 17048.1397 18992.849 11791.3153 01/31/2022 15193.2238 16279.7949 17987.9214 11537.2834 02/28/2022 14756.0752 15925.586 17532.984 11408.5678 03/31/2022 14801.929 16142.7653 18014.1493 11091.6175 04/30/2022 14131.6381 14983.8435 16517.6524 10670.7144 05/31/2022 14651.0225 15016.5077 16530.1628 10739.5156 06/30/2022 13537.9624 13982.0427 15098.2876 10571.0322 07/31/2022 13817.8047 14900.0454 16297.0356 10829.3297 08/31/2022 13441.6187 14327.5848 15615.6915 10523.3289 09/30/2022 12365.9506 13173.9075 14164.0597 10068.656 10/31/2022 13135.1811 13840.7912 15181.2213 9938.2431 11/30/2022 14240.0623 14689.8094 16236.7787 10303.7277 12/31/2022 13907.1338 14205.3666 15547.2462 10257.2511 01/31/2023 14757.0809 15068.457 16647.3085 10572.8045 02/28/2023 14696.4459 14699.3899 16247.132 10299.4421 03/31/2023 14677.2244 15133.3954 16749.1637 10561.074 04/30/2023 15062.6561 15355.2846 17042.7678 10625.0789 05/31/2023 14638.7405 15198.5114 16872.623 10509.3854 06/30/2023 15193.9626 15874.3399 17893.0417 10471.9057 07/31/2023 15623.6287 16271.5212 18494.1193 10464.6061 08/31/2023 15406.0744 15954.0444 18052.3737 10397.7624 09/30/2023 15169.2008 15336.5152 17273.623 10133.5371 10/31/2023 14895.245 14942.2579 16772.4149 9973.62 11/30/2023 15779.1854 16162.0792 18344.8642 10425.2889 12/31/2023 16444.1891 16911.8449 19245.4914 10824.3581 01/31/2024 16510.9114 17052.4469 19476.446 10794.6337 02/29/2024 16539.4841 17534.4531 20302.2014 10642.1215 03/31/2024 17392.8081 17997.532 20954.6094 10740.3918 04/30/2024 17165.1029 17382.4976 20176.2559 10469.102 05/31/2024 17844.9303 18038.2933 21077.1674 10646.5874 06/30/2024 17855.7557 18356.2689 21506.0423 10747.386 07/31/2024 18530.7634 18706.0658 21885.0312 10998.4089 08/31/2024 18964.21 19144.076 22463.463 11156.4585 09/30/2024 18993.7208 19471.1103 22874.8572 11305.8365 Effective September 30, 2024, the Fund adopted the MSCI World Net Total Return USD Index and the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market indices that represent the overall applicable markets in which the Fund invests, and a Blended Benchmark, comprised of 25% Bloomberg U.S. Aggregate Bond Total Return Value USD and 75% MSCI World Net Total Return USD Index, as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year Investment Income Builder Fund Class R6 25.23% 9.73% MSCI World Net Total Return USD Index 32.43% 13.04% Investment Income Builder Fund’s Blended Index 26.96% 9.97% Bloomberg U.S. Aggregate Total Return Value Index USD 11.57% 0.33%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fib/TIBOX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 13,932,000,000
Holdings Count | Holdings	341
Advisory Fees Paid, Amount	$ 87,800,000
Investment Company, Portfolio Turnover	24.81%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $13,932.0 Number of Holdings 341 Annual Portfolio Turnover 24.81% Total Advisory Fee $87.8
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Portfolio Composition (%) Foreign Equity 56.8 Domestic Equity 27.4 Domestic Corporate Bonds 4.5 Domestic Other Bonds 3.2 Foreign Bonds 2.8 Other Assets Less Liabilities 5.2 Portfolio Composition (%) Foreign Equity 56.8% Domestic Equity 27.4% Domestic Corporate Bonds 4.5% Domestic Other Bonds 3.2% Foreign Bonds 2.8% Other Assets Less Liabilities 5.2% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Summit Fund - Class A
Shareholder Report [Line Items]
Class Name	CLASS: A
Trading Symbol	TSAMX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Summit Fund Class A Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $104.00 0.94%
Expenses Paid, Amount	$ 104
Expense Ratio, Percent	0.94%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class A shares underperformed the benchmark composed of 60% MSCI All Country World Index and 40% Bloomberg Global Aggregate Bond Index (the “Blended Index”) during the 12-month period ended September 30, 2024. Equity markets rebounded strongly in 2023 and continued to climb through the first three quarters of 2024. The Fund’s security selection within equities contributed positively to relative performance, but underweight positioning to equities versus the Blended Index was a headwind to relative results. Within the Fund’s equity holdings, selection effect from information technology and industrials, as well as an overweight positioning within communication services and underweight positioning within consumer staples, contributed positively to relative performance. Security selection within financials and health care hampered results relative to the Blended Index. Given spread tightening over the course of the period, the Fund’s relative overweight to credit versus government bonds contributed positively to relative performance. Selection effect within asset backed securities and corporate bonds was a detractor to the Fund’s relative performance.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Summit Fund Thornburg Summit Fund’s Blended Index MSCI All Country World Net Total Return USD Index Bloomberg Global-Aggregate Total Return Index Value Unhedged USD 01/26/2022 9548.698 10000.0105 10000 10000.0263 01/31/2022 9738.7218 10120.4367 10232.6804 9952.0707 02/28/2022 9596.2039 9915.4874 9968.384 9833.7943 03/31/2022 9620.8351 9923.5679 10184.3021 9534.3248 04/30/2022 9167.2474 9229.498 9369.1187 9011.9468 05/31/2022 9278.6549 9246.0653 9380.0999 9036.5447 06/30/2022 8695.4282 8659.7542 8589.3961 8746.5976 07/31/2022 9055.736 9096.2327 9189.2146 8932.5424 08/31/2022 8855.565 8751.7128 8850.8987 8580.0412 09/30/2022 8305.0658 8069.1688 8003.6014 8139.2048 10/31/2022 8530.6156 8339.1523 8486.6095 8083.2344 11/30/2022 9078.3794 8884.2103 9144.8471 8463.6349 12/31/2022 8926.5337 8693.6762 8785.0113 8509.3959 01/31/2023 9380.5626 9181.7092 9414.6756 8788.752 02/28/2023 9121.1175 8901.7208 9144.8471 8496.5722 03/31/2023 9323.7235 9179.0061 9426.8185 8765.2608 04/30/2023 9445.8684 9274.3607 9562.2998 8803.942 05/31/2023 9364.4385 9142.2328 9459.8729 8631.8325 06/30/2023 9578.0987 9460.4373 10009.128 8631.1646 07/31/2023 9775.9252 9694.4408 10375.547 8690.9325 08/31/2023 9635.7981 9478.8522 10085.6093 8572.0454 09/30/2023 9334.0373 9132.916 9668.5716 8321.6192 10/31/2023 9135.7923 8924.4894 9377.8594 8222.1586 11/30/2023 9689.2263 9598.7274 10243.4126 8636.775 12/31/2023 10041.7053 10034.9351 10735.4381 8995.7262 01/31/2024 10157.8903 10014.8379 10798.3658 8871.5913 02/29/2024 10323.8689 10222.3619 11261.7626 8760.1084 03/31/2024 10584.6909 10437.4411 11615.3472 8808.3311 04/30/2024 10351.1438 10125.4526 11232.1106 8586.0333 05/31/2024 10651.4187 10425.2753 11688.288 8698.5657 06/30/2024 10914.5315 10570.5838 11948.6289 8711.046 07/31/2024 10998.6188 10789.616 12141.3121 8951.5872 08/31/2024 11183.6109 11056.1505 12449.6717 9163.3894 09/30/2024 11375.9344 11285.5211 12738.8901 9319.3357 Effective September 30, 2024, the Fund adopted the MSCI All Country World Net Total Return USD Index and the Bloomberg Global-Aggregate Total Return Index Value Unhedged USD as its broad-based securities market indices that represent the overall applicable markets in which the Fund invests, and a Blended Benchmark, comprised of 60% MSCI All Country World Index and 40% Bloomberg Global Aggregate Bond Index, as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year Summit Fund Class A (with sales charge) 16.42% Summit Fund Class A (without sales charge) 21.88% MSCI All Country World Net Total Return USD Index 31.76% Summit Fund’s Blended Index 23.57%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment and assumes the deduction of the maximum sales charge associated with that investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fs/TSAMX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 112,300,000
Holdings Count | Holdings	201
Advisory Fees Paid, Amount	$ 400,000
Investment Company, Portfolio Turnover	66.54%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $112.3 Number of Holdings 201 Annual Portfolio Turnover 66.54% Total Advisory Fee $0.4
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Portfolio Composition (%) Domestic Equity 31.7 Domestic Other Bonds 25.7 Foreign Equity 24.0 Domestic Corporate Bonds 4.6 Foreign Bonds 5.0 Other Assets Less Liabilities 8.9 Portfolio Composition (%) Domestic Equity 31.7% Domestic Other Bonds 25.7% Foreign Equity 24.0% Domestic Corporate Bonds 4.6% Foreign Bonds 5.0% Other Assets Less Liabilities 8.9% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Summit Fund - Class I
Shareholder Report [Line Items]
Class Name	CLASS: I
Trading Symbol	TSUMX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Summit Fund Class I Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $77.00 0.69%
Expenses Paid, Amount	$ 77
Expense Ratio, Percent	0.69%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class I shares underperformed the benchmark composed of 60% MSCI All Country World Index and 40% Bloomberg Global Aggregate Bond Index (the “Blended Index”) during the 12-month period ended September 30, 2024. Equity markets rebounded strongly in 2023 and continued to climb through the first three quarters of 2024. The Fund’s security selection within equities contributed positively to relative performance, but underweight positioning to equities versus the Blended Index was a headwind to relative results. Within the Fund’s equity holdings, selection effect from information technology and industrials, as well as an overweight positioning within communication services and underweight positioning within consumer staples, contributed positively to relative performance. Security selection within financials and health care hampered results relative to the Blended Index. Given spread tightening over the course of the period, the Fund’s relative overweight to credit versus government bonds contributed positively to relative performance. Selection effect within asset backed securities and corporate bonds was a detractor to the Fund’s relative performance.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Summit Fund Thornburg Summit Fund’s Blended Index MSCI All Country World Net Total Return USD Index Bloomberg Global-Aggregate Total Return Index Value Unhedged USD 03/01/2019 10000 10000.0699 10000 10000.1747 03/31/2019 10190 10108.0383 10079.7834 10150.4215 04/30/2019 10390 10300.8625 10420.1522 10120.3721 05/31/2019 10200 9990.0287 9802.0325 10257.4088 06/30/2019 10461.1027 10471.1288 10443.8857 10484.8425 07/31/2019 10390.7591 10477.8874 10474.4693 10455.7056 08/31/2019 10511.3481 10413.9875 10226.0126 10668.3116 09/30/2019 10545.1327 10503.0742 10441.1457 10559.8103 10/31/2019 10605.5633 10703.5226 10726.9152 10630.1122 11/30/2019 10715.0891 10827.8471 10988.79 10549.5243 12/31/2019 10976.0451 11081.869 11375.7394 10611.0332 01/31/2020 10976.0451 11065.0217 11250.1007 10746.4938 02/29/2020 10629.8618 10558.5462 10341.4164 10818.7657 03/31/2020 9958.0419 9608.6507 8945.2879 10576.3593 04/30/2020 10737.4561 10301.7217 9903.5749 10784.0089 05/31/2020 11301.5059 10588.6117 10334.2843 10831.3122 06/30/2020 11660.4467 10829.2437 10664.4988 10927.5366 07/31/2020 12070.6647 11311.0289 11228.5028 11276.0594 08/31/2020 12634.7144 11719.5207 11915.7681 11258.8676 09/30/2020 12491.1381 11475.9284 11531.5588 11218.3663 10/31/2020 12286.0291 11312.9375 11251.229 11229.1085 11/30/2020 13179.7575 12231.8937 12638.0897 11433.2742 12/31/2020 14024.7232 12638.357 13224.8602 11586.8391 01/31/2021 13884.7989 12559.3689 13164.7406 11484.8081 02/28/2021 14842.7424 12647.4249 13469.6501 11287.1127 03/31/2021 14781.1732 12752.8039 13829.4409 11069.9859 04/30/2021 15316.4855 13151.8036 14434.1022 11209.8429 05/31/2021 15524.0555 13323.9939 14658.7044 11315.109 06/30/2021 15622.3782 13382.3212 14851.8769 11215.2763 07/31/2021 15709.7761 13508.9099 14954.2253 11364.5692 08/31/2021 15971.9699 13689.3108 15328.5222 11317.3073 09/30/2021 15567.7545 13252.705 14695.292 11116.2109 10/31/2021 15982.8946 13645.7809 15445.4169 11089.3344 11/30/2021 15661.6769 13432.644 15073.4571 11056.9002 12/31/2021 16078.1965 13747.5461 15676.426 11041.4711 01/31/2022 15795.6723 13229.7383 14906.5164 10815.1781 02/28/2022 15564.5161 12961.8224 14521.5012 10686.6439 03/31/2022 15608.8066 12972.3854 14836.0411 10361.2025 04/30/2022 14885.818 12065.0766 13648.518 9793.5205 05/31/2022 15053.6547 12086.7338 13664.5149 9820.2518 06/30/2022 14125.7715 11320.2904 12512.6525 9505.1586 07/31/2022 14697.5599 11890.8682 13386.4417 9707.2297 08/31/2022 14385.6753 11440.5014 12893.598 9324.1573 09/30/2022 13488.6039 10548.2594 11659.2927 8845.0888 10/31/2022 13854.9288 10901.1899 12362.9177 8784.2643 11/30/2022 14757.6578 11613.706 13321.8091 9197.6555 12/31/2022 14506.4017 11364.6342 12797.6162 9247.3853 01/31/2023 15244.2386 12002.6055 13714.8832 9550.9689 02/28/2023 14835.7932 11636.5964 13321.8091 9233.4493 03/31/2023 15161.0824 11999.0719 13732.5726 9525.4404 04/30/2023 15372.9403 12123.7224 13929.9357 9567.4763 05/31/2023 15240.5291 11951.0008 13780.7247 9380.4403 06/30/2023 15597.1558 12366.9673 14580.8552 9379.7144 07/31/2023 15905.612 12672.8637 15114.6382 9444.6659 08/31/2023 15691.0338 12391.0399 14692.2699 9315.4681 09/30/2023 15196.3304 11938.8216 14084.7477 9043.3233 10/31/2023 14887.0246 11666.3601 13661.2511 8935.2369 11/30/2023 15788.0459 12547.7442 14922.1508 9385.8114 12/31/2023 16371.4 13117.968 15638.9117 9775.8932 01/31/2024 16560.6648 13091.6964 15730.582 9640.9925 02/29/2024 16831.0429 13362.978 16405.638 9519.8411 03/31/2024 17252.7656 13644.136 16920.7243 9572.246 04/30/2024 16885.6855 13236.2952 16362.4422 9330.6691 05/31/2024 17388.7212 13628.2324 17026.9813 9452.9611 06/30/2024 17801.0446 13818.184 17406.2344 9466.5237 07/31/2024 17951.9009 14104.5096 17686.9268 9727.9262 08/31/2024 18253.6135 14452.9315 18136.1314 9958.0973 09/30/2024 18579.0767 14752.7715 18557.4521 10127.5682 Effective September 30, 2024, the Fund adopted the MSCI All Country World Net Total Return USD Index and the Bloomberg Global-Aggregate Total Return Index Value Unhedged USD as its broad-based securities market indices that represent the overall applicable markets in which the Fund invests, and a Blended Benchmark, comprised of 60% MSCI All Country World Index and 40% Bloomberg Global Aggregate Bond Index, as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year Summit Fund Class I 22.26% 11.99% MSCI All Country World Net Total Return USD Index 31.76% 12.19% Summit Fund’s Blended Index 23.57% 7.03%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fs/TSUMX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 112,300,000
Holdings Count | Holdings	201
Advisory Fees Paid, Amount	$ 400,000
Investment Company, Portfolio Turnover	66.54%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $112.3 Number of Holdings 201 Annual Portfolio Turnover 66.54% Total Advisory Fee $0.4
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Portfolio Composition (%) Domestic Equity 31.7 Domestic Other Bonds 25.7 Foreign Equity 24.0 Domestic Corporate Bonds 4.6 Foreign Bonds 5.0 Other Assets Less Liabilities 8.9 Portfolio Composition (%) Domestic Equity 31.7% Domestic Other Bonds 25.7% Foreign Equity 24.0% Domestic Corporate Bonds 4.6% Foreign Bonds 5.0% Other Assets Less Liabilities 8.9% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Ultra Short Income Fund Class A
Shareholder Report [Line Items]
Class Name	CLASS: A
Trading Symbol	TLDAX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Ultra Short Income Fund Class A Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $52.00 0.50%
Expenses Paid, Amount	$ 52
Expense Ratio, Percent	0.50%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class A shares outperformed the ICE BofA U.S. Treasury Bill Index (the “Index”) during the 12-month period ended September 30, 2024. Treasury yields fell meaningfully over the 12-month period as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. The Fund’s relatively longer duration versus the Index proved to be a positive contributor to relative performance. Additionally, the Fund’s allocation to asset-backed securities and investment-grade corporate bonds was beneficial. There were no material detractors to the Fund’s performance over the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Ultra Short Income Fund ICE BofA U.S. Treasury Bill Index Bloomberg U.S. Aggregate Total Return Value Index USD 09/30/2014 9848.8471 10000 10000 10/31/2014 9862.7621 10000.1038 10098.2769 11/30/2014 9876.8604 10000.3113 10169.91 12/31/2014 9850.5616 10000.3113 10179.4256 01/31/2015 9887.8964 10002.0235 10392.8789 02/28/2015 9878.0515 10002.231 10295.1602 03/31/2015 9899.5276 10002.2829 10342.967 04/30/2015 9904.7728 10003.9951 10305.856 05/31/2015 9909.9312 10004.462 10281.0356 06/30/2015 9907.2175 10005.1884 10168.9318 07/31/2015 9904.2847 10004.8252 10239.6187 08/31/2015 9901.7892 10005.3441 10224.9146 09/30/2015 9915.4886 10009.2873 10294.0811 10/31/2015 9912.2789 10007.9383 10295.7875 11/30/2015 9902.2177 10007.0044 10268.5908 12/31/2015 9878.6027 10008.8722 10235.4031 01/31/2016 9925.871 10011.5183 10376.2558 02/29/2016 9924.5218 10014.2681 10449.8664 03/31/2016 9972.886 10019.716 10545.7404 04/30/2016 9997.479 10022.9847 10586.2218 05/31/2016 10006.9803 10023.1403 10588.9383 06/30/2016 10049.0523 10029.7815 10779.1979 07/31/2016 10058.3101 10032.0125 10847.3436 08/31/2016 10051.408 10033.7766 10834.9414 09/30/2016 10073.9723 10038.6018 10828.5941 10/31/2016 10066.4978 10040.9366 10745.7655 11/30/2016 10035.9867 10041.8705 10491.5864 12/31/2016 10045.6261 10045.9175 10506.3861 01/31/2017 10066.5928 10051.3653 10527.0016 02/28/2017 10092.9888 10055.568 10597.7522 03/31/2017 10105.4957 10056.5019 10592.197 04/30/2017 10117.6549 10063.143 10673.9358 05/31/2017 10136.2548 10067.8126 10756.0945 06/30/2017 10140.5077 10075.8547 10745.2712 07/31/2017 10160.543 10083.7411 10791.5097 08/31/2017 10172.7617 10094.1698 10888.3034 09/30/2017 10178.0037 10102.4712 10836.4459 10/31/2017 10182.8394 10110.6171 10842.724 11/30/2017 10172.5222 10117.829 10828.8068 12/31/2017 10176.7 10127.5313 10878.506 01/31/2018 10165.0503 10138.6345 10753.2186 02/28/2018 10161.1418 10147.2992 10651.2843 03/31/2018 10169.488 10161.5673 10719.5896 04/30/2018 10177.9056 10175.2647 10639.8655 05/31/2018 10202.3187 10191.0375 10715.7993 06/30/2018 10211.5215 10207.5367 10702.6209 07/31/2018 10221.0277 10223.9321 10705.1619 08/31/2018 10255.0548 10242.8698 10774.0467 09/30/2018 10254.6039 10257.9162 10704.6676 10/31/2018 10255.4869 10276.4389 10620.0741 11/30/2018 10266.7447 10297.0369 10683.4727 12/31/2018 10320.5733 10317.5311 10879.7393 01/31/2019 10373.3742 10339.4781 10995.2773 02/28/2019 10400.7995 10358.4159 10988.9087 03/31/2019 10463.4052 10381.9713 11199.9166 04/30/2019 10483.5676 10402.258 11202.782 05/31/2019 10548.1753 10426.8511 11401.6482 06/30/2019 10586.2693 10451.3923 11544.8346 07/31/2019 10590.1194 10470.0187 11570.2238 08/31/2019 10661.5975 10492.3808 11870.0302 09/30/2019 10664.6365 10509.8658 11806.8123 10/31/2019 10684.0959 10531.709 11842.3764 11/30/2019 10695.3149 10544.4725 11836.3427 12/31/2019 10706.2822 10559.9859 11828.0976 01/31/2020 10759.1035 10574.6691 12055.7234 02/29/2020 10803.1625 10593.97 12272.7065 03/31/2020 10528.128 10628.5768 12200.4833 04/30/2020 10694.5981 10628.8362 12417.3601 05/31/2020 10834.2976 10628.8362 12475.1769 06/30/2020 10927.8657 10630.4446 12553.758 07/31/2020 10960.0482 10632.9869 12741.2746 08/31/2020 10983.7174 10633.6614 12638.4313 09/30/2020 10998.2463 10634.9585 12631.4992 10/31/2020 11003.4241 10636.0481 12575.0965 11/30/2020 11017.1299 10637.0858 12698.4914 12/31/2020 11032.6042 10638.2272 12715.9864 01/31/2021 11037.5642 10639.0574 12624.817 02/28/2021 11041.3254 10640.0951 12442.5048 03/31/2021 11035.8625 10641.0809 12287.1394 04/30/2021 11042.8586 10641.4959 12384.2096 05/31/2021 11046.048 10641.7553 12424.6696 06/30/2021 11048.8814 10641.2884 12511.9637 07/31/2021 11051.8206 10641.8072 12651.8595 08/31/2021 11054.0438 10642.3261 12627.7727 09/30/2021 11057.406 10642.8449 12518.4439 10/31/2021 11050.223 10642.7411 12514.9938 11/30/2021 11043.3656 10643.2081 12552.0197 12/31/2021 11045.6602 10643.5713 12519.9004 01/31/2022 11038.5303 10640.6658 12250.172 02/28/2022 10959.8585 10640.9252 12113.503 03/31/2022 10934.6596 10640.7177 11776.9683 04/30/2022 10920.8422 10642.378 11330.0576 05/31/2022 10924.8974 10649.071 11403.1101 06/30/2022 10913.904 10648.6041 11224.2161 07/31/2022 10923.1659 10656.231 11498.4738 08/31/2022 10953.8253 10673.0934 11173.5652 09/30/2022 10951.0247 10693.4839 10690.7981 10/31/2022 10952.4118 10709.6717 10552.327 11/30/2022 10993.8213 10744.0191 10940.3949 12/31/2022 11047.8221 10785.8377 10891.0465 01/31/2023 11112.4525 10821.067 11226.0979 02/28/2023 11141.3192 10856.4521 10935.8444 03/31/2023 11191.9546 10906.6241 11213.6426 04/30/2023 11234.3443 10943.2543 11281.6023 05/31/2023 11278.4973 10982.79 11158.7602 06/30/2023 11323.2218 11032.08 11118.9646 07/31/2023 11378.0738 11077.323 11111.2139 08/31/2023 11425.6828 11127.495 11040.24 09/30/2023 11473.2432 11178.0302 10759.6881 10/31/2023 11521.8623 11228.1503 10589.8898 11/30/2023 11586.6316 11280.6052 11069.4673 12/31/2023 11663.4071 11335.0836 11493.195 01/31/2024 11723.7458 11383.3358 11461.6339 02/29/2024 11764.567 11428.0081 11299.6979 03/31/2024 11816.142 11479.7885 11404.0404 04/30/2024 11860.1934 11527.4701 11115.9877 05/31/2024 11922.4256 11583.4012 11304.4398 06/30/2024 11977.5452 11631.3422 11411.4668 07/31/2024 12044.2615 11686.08 11678.0004 08/31/2024 12110.631 11744.6572 11845.8158 09/30/2024 12175.8823 11797.7866 12004.424 Effective September 30, 2024, the Fund adopted the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the ICE BofA U.S. Treasury Bill Index as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Ultra Short Income Fund Class A (with sales charge) 3.74% 2.38% 1.99% Ultra Short Income Fund Class A (without sales charge) 6.12% 2.69% 2.14% ICE BofA U.S. Treasury Bill Index 5.54% 2.34% 1.67% Bloomberg U.S. Aggregate Total Return Value Index USD 11.57% 0.33% 1.84%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment and assumes the deduction of the maximum sales charge associated with that investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fldi/TLDAX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 264,200,000
Holdings Count | Holdings	280
Advisory Fees Paid, Amount	$ 600,000
Investment Company, Portfolio Turnover	44.59%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $264.2 Number of Holdings 280 Annual Portfolio Turnover 44.59% Total Advisory Fee $0.6
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) U.S. Government 5.3 AAA 16.3 AA 9.3 A 13.1 BBB 43.6 NR 0.8 Below Invest. Grade 0.9 Cash Equivalents & Other 10.7 Credit Quality Ratings (%) U.S. Government 5.3% AAA 16.3% AA 9.3% A 13.1% BBB 43.6% NR 0.8% Below Invest. Grade 0.9% Cash Equivalents & Other 10.7% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Ultra Short Income Fund Class I
Shareholder Report [Line Items]
Class Name	CLASS: I
Trading Symbol	TLDIX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Ultra Short Income Fund Class I Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $31.00 0.30%
Expenses Paid, Amount	$ 31
Expense Ratio, Percent	0.30%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class I shares outperformed the ICE BofA U.S. Treasury Bill Index (the “Index”) during the 12-month period ended September 30, 2024. Treasury yields fell meaningfully over the 12-month period as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. The Fund’s relatively longer duration versus the Index proved to be a positive contributor to relative performance. Additionally, the Fund’s allocation to asset-backed securities and investment-grade corporate bonds was beneficial. There were no material detractors to the Fund’s performance over the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Ultra Short Income Fund ICE BofA U.S. Treasury Bill Index Bloomberg U.S. Aggregate Total Return Value Index USD 09/30/2014 9999.9945 10000 10000 10/31/2014 10015.8282 10000.1038 10098.2769 11/30/2014 10031.786 10000.3113 10169.91 12/31/2014 10006.7796 10000.3113 10179.4256 01/31/2015 10046.418 10002.0235 10392.8789 02/28/2015 10037.9516 10002.231 10295.1602 03/31/2015 10061.484 10002.2829 10342.967 04/30/2015 10068.4652 10003.9951 10305.856 05/31/2015 10075.4092 10004.462 10281.0356 06/30/2015 10074.2966 10005.1884 10168.9318 07/31/2015 10073.0241 10004.8252 10239.6187 08/31/2015 10072.1983 10005.3441 10224.9146 09/30/2015 10079.645 10009.2873 10294.0811 10/31/2015 10078.0968 10007.9383 10295.7875 11/30/2015 10077.6618 10007.0044 10268.5908 12/31/2015 10055.325 10008.8722 10235.4031 01/31/2016 10096.9771 10011.5183 10376.2558 02/29/2016 10105.3752 10014.2681 10449.8664 03/31/2016 10156.3688 10019.716 10545.7404 04/30/2016 10183.0711 10022.9847 10586.2218 05/31/2016 10186.2645 10023.1403 10588.9383 06/30/2016 10239.005 10029.7815 10779.1979 07/31/2016 10241.9552 10032.0125 10847.3436 08/31/2016 10244.8874 10033.7766 10834.9414 09/30/2016 10261.6261 10038.6018 10828.5941 10/31/2016 10263.9952 10040.9366 10745.7655 11/30/2016 10234.5736 10041.8705 10491.5864 12/31/2016 10246.1335 10045.9175 10506.3861 01/31/2017 10264.9928 10051.3653 10527.0016 02/28/2017 10285.2094 10055.568 10597.7522 03/31/2017 10299.7043 10056.5019 10592.197 04/30/2017 10322.1005 10063.143 10673.9358 05/31/2017 10342.829 10067.8126 10756.0945 06/30/2017 10340.558 10075.8547 10745.2712 07/31/2017 10362.7636 10083.7411 10791.5097 08/31/2017 10385.3396 10094.1698 10888.3034 09/30/2017 10384.0179 10102.4712 10836.4459 10/31/2017 10390.7164 10110.6171 10842.724 11/30/2017 10381.9802 10117.829 10828.8068 12/31/2017 10388.0238 10127.5313 10878.506 01/31/2018 10386.2818 10138.6345 10753.2186 02/28/2018 10375.6558 10147.2992 10651.2843 03/31/2018 10393.7885 10161.5673 10719.5896 04/30/2018 10395.9267 10175.2647 10639.8655 05/31/2018 10431.0755 10191.0375 10715.7993 06/30/2018 10433.7061 10207.5367 10702.6209 07/31/2018 10445.2206 10223.9321 10705.1619 08/31/2018 10481.7402 10242.8698 10774.0467 09/30/2018 10482.9939 10257.9162 10704.6676 10/31/2018 10494.1506 10276.4389 10620.0741 11/30/2018 10507.384 10297.0369 10683.4727 12/31/2018 10564.2609 10317.5311 10879.7393 01/31/2019 10611.5063 10339.4781 10995.2773 02/28/2019 10641.1892 10358.4159 10988.9087 03/31/2019 10706.992 10381.9713 11199.9166 04/30/2019 10729.3187 10402.258 11202.782 05/31/2019 10797.3726 10426.8511 11401.6482 06/30/2019 10838.1566 10451.3923 11544.8346 07/31/2019 10852.6276 10470.0187 11570.2238 08/31/2019 10919.025 10492.3808 11870.0302 09/30/2019 10923.9187 10509.8658 11806.8123 10/31/2019 10945.6963 10531.709 11842.3764 11/30/2019 10958.9717 10544.4725 11836.3427 12/31/2019 10972.0764 10559.9859 11828.0976 01/31/2020 11028.0968 10574.6691 12055.7234 02/29/2020 11083.875 10593.97 12272.7065 03/31/2020 10803.5155 10628.5768 12200.4833 04/30/2020 10976.1167 10628.8362 12417.3601 05/31/2020 11121.3446 10628.8362 12475.1769 06/30/2020 11210.275 10630.4446 12553.758 07/31/2020 11245.21 10632.9869 12741.2746 08/31/2020 11271.3907 10633.6614 12638.4313 09/30/2020 11288.1472 10634.9585 12631.4992 10/31/2020 11295.3769 10636.0481 12575.0965 11/30/2020 11311.3447 10637.0858 12698.4914 12/31/2020 11329.1373 10638.2272 12715.9864 01/31/2021 11336.1589 10639.0574 12624.817 02/28/2021 11341.7536 10640.0951 12442.5048 03/31/2021 11338.0223 10641.0809 12287.1394 04/30/2021 11347.0656 10641.4959 12384.2096 05/31/2021 11352.264 10641.7553 12424.6696 06/30/2021 11357.0408 10641.2884 12511.9637 07/31/2021 11361.9821 10641.8072 12651.8595 08/31/2021 11366.1668 10642.3261 12627.7727 09/30/2021 11371.4736 10642.8449 12518.4439 10/31/2021 11365.9839 10642.7411 12514.9938 11/30/2021 11370.0312 10643.2081 12552.0197 12/31/2021 11365.1619 10643.5713 12519.9004 01/31/2022 11359.7176 10640.6658 12250.172 02/28/2022 11289.5166 10640.9252 12113.503 03/31/2022 11256.2819 10640.7177 11776.9683 04/30/2022 11253.1092 10642.378 11330.0576 05/31/2022 11249.9474 10649.071 11403.1101 06/30/2022 11240.4389 10648.6041 11224.2161 07/31/2022 11261.1303 10656.231 11498.4738 08/31/2022 11285.3574 10673.0934 11173.5652 09/30/2022 11284.2896 10693.4839 10690.7981 10/31/2022 11287.623 10709.6717 10552.327 11/30/2022 11332.1582 10744.0191 10940.3949 12/31/2022 11389.77 10785.8377 10891.0465 01/31/2023 11458.2519 10821.067 11226.0979 02/28/2023 11489.8059 10856.4521 10935.8444 03/31/2023 11543.9823 10906.6241 11213.6426 04/30/2023 11589.5934 10943.2543 11281.6023 05/31/2023 11637.1121 10982.79 11158.7602 06/30/2023 11685.1653 11032.08 11118.9646 07/31/2023 11743.7632 11077.323 11111.2139 08/31/2023 11794.9082 11127.495 11040.24 09/30/2023 11845.9437 11178.0302 10759.6881 10/31/2023 11898.1587 11228.1503 10589.8898 11/30/2023 11967.0083 11280.6052 11069.4673 12/31/2023 12048.1588 11335.0836 11493.195 01/31/2024 12112.5398 11383.3358 11461.6339 02/29/2024 12156.629 11428.0081 11299.6979 03/31/2024 12211.9804 11479.7885 11404.0404 04/30/2024 12259.483 11527.4701 11115.9877 05/31/2024 12325.8819 11583.4012 11304.4398 06/30/2024 12384.8693 11631.3422 11411.4668 07/31/2024 12455.9682 11686.08 11678.0004 08/31/2024 12527.3867 11744.6572 11845.8158 09/30/2024 12598.1479 11797.7866 12004.424 Effective September 30, 2024, the Fund adopted the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the ICE BofA U.S. Treasury Bill Index as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Ultra Short Income Fund Class I 6.35% 2.89% 2.34% ICE BofA U.S. Treasury Bill Index 5.54% 2.34% 1.67% Bloomberg U.S. Aggregate Total Return Value Index USD 11.57% 0.33% 1.84%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fldi/TLDIX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 264,200,000
Holdings Count | Holdings	280
Advisory Fees Paid, Amount	$ 600,000
Investment Company, Portfolio Turnover	44.59%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $264.2 Number of Holdings 280 Annual Portfolio Turnover 44.59% Total Advisory Fee $0.6
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) U.S. Government 5.3 AAA 16.3 AA 9.3 A 13.1 BBB 43.6 NR 0.8 Below Invest. Grade 0.9 Cash Equivalents & Other 10.7 Credit Quality Ratings (%) U.S. Government 5.3% AAA 16.3% AA 9.3% A 13.1% BBB 43.6% NR 0.8% Below Invest. Grade 0.9% Cash Equivalents & Other 10.7% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Limited Term U.S. Government Fund - Class A
Shareholder Report [Line Items]
Class Name	CLASS: A
Trading Symbol	LTUSX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Limited Term U.S. Government Fund Class A Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $103.00 0.99%
Expenses Paid, Amount	$ 103
Expense Ratio, Percent	0.99%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class A shares outperformed the Bloomberg U.S. Government Intermediate Total Return Index Value Unhedged (the “Index”) during the 12-month period ended September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. The Fund’s long duration, compared to the Index, was a relative contributor in this environment. Positive relative returns from the Fund’s allocation to asset-backed securities, collateralized mortgage obligations, and commercial mortgage-backed securities also contributed. There were no meaningful detractors to the Fund’s performance over the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Limited Term U.S. Government Fund Bloomberg U.S. Government Intermediate Total Return Index Value Unhedged Bloomberg U.S. Aggregate Total Return Value Index USD 09/30/2014 9851.5153 10000 10000 10/31/2014 9899.6985 10070.1644 10098.2769 11/30/2014 9934.1958 10120.9308 10169.91 12/31/2014 9902.5783 10094.5925 10179.4256 01/31/2015 9985.5717 10255.4004 10392.8789 02/28/2015 9948.8922 10167.2664 10295.1602 03/31/2015 9973.7459 10220.968 10342.967 04/30/2015 9973.6755 10211.7143 10305.856 05/31/2015 9976.4707 10216.8621 10281.0356 06/30/2015 9954.0703 10177.0746 10168.9318 07/31/2015 9969.1242 10218.0552 10239.6187 08/31/2015 9975.7772 10223.7071 10224.9146 09/30/2015 10011.1674 10299.8931 10294.0811 10/31/2015 9989.6005 10267.1468 10295.7875 11/30/2015 9966.7951 10233.2913 10268.5908 12/31/2015 9936.6944 10213.8093 10235.4031 01/31/2016 10047.0775 10375.9447 10376.2558 02/29/2016 10071.1603 10427.2264 10449.8664 03/31/2016 10092.9062 10446.9605 10545.7404 04/30/2016 10098.8946 10443.9861 10586.2218 05/31/2016 10084.3426 10429.0917 10588.9383 06/30/2016 10161.8389 10576.8705 10779.1979 07/31/2016 10154.459 10580.7748 10847.3436 08/31/2016 10138.3976 10533.246 10834.9414 09/30/2016 10152.256 10551.2324 10828.5941 10/31/2016 10138.7353 10500.7461 10745.7655 11/30/2016 10035.0414 10324.3045 10491.5864 12/31/2016 10026.2343 10321.4869 10506.3861 01/31/2017 10035.3884 10342.0668 10527.0016 02/28/2017 10054.1376 10371.9788 10597.7522 03/31/2017 10046.219 10377.1322 10592.197 04/30/2017 10082.5605 10431.506 10673.9358 05/31/2017 10109.3836 10472.509 10756.0945 06/30/2017 10076.0889 10445.1736 10745.2712 07/31/2017 10103.1884 10478.4858 10791.5097 08/31/2017 10145.1823 10542.27 10888.3034 09/30/2017 10108.1195 10481.1129 10836.4459 10/31/2017 10098.5828 10467.9045 10842.724 11/30/2017 10083.7409 10436.0096 10828.8068 12/31/2017 10086.0853 10438.6871 10878.506 01/31/2018 10019.0753 10339.3165 10753.2186 02/28/2018 9991.1484 10308.9283 10651.2843 03/31/2018 10031.5366 10362.5739 10719.5896 04/30/2018 9993.3961 10303.7974 10639.8655 05/31/2018 10047.1333 10370.2928 10715.7993 06/30/2018 10040.4357 10369.1445 10702.6209 07/31/2018 10018.5431 10348.9063 10705.1619 08/31/2018 10064.748 10410.3267 10774.0467 09/30/2018 10030.3156 10357.6278 10704.6676 10/31/2018 10012.2094 10361.6441 10620.0741 11/30/2018 10066.528 10432.5927 10683.4727 12/31/2018 10169.3722 10587.519 10879.7393 01/31/2019 10219.289 10632.7567 10995.2773 02/28/2019 10221.9052 10625.3739 10988.9087 03/31/2019 10301.5508 10754.931 11199.9166 04/30/2019 10310.638 10759.8771 11202.782 05/31/2019 10407.7453 10917.1224 11401.6482 06/30/2019 10449.0176 11007.0825 11544.8346 07/31/2019 10449.4736 10987.8862 11570.2238 08/31/2019 10545.11 11185.5127 11870.0302 09/30/2019 10537.5221 11136.4716 11806.8123 10/31/2019 10553.9626 11168.5514 11842.3764 11/30/2019 10545.1897 11141.3729 11836.3427 12/31/2019 10536.6069 11138.0904 11828.0976 01/31/2020 10647.7428 11295.1397 12055.7234 02/29/2020 10742.9735 11480.5774 12272.7065 03/31/2020 10734.0679 11714.8825 12200.4833 04/30/2020 10813.7095 11747.2424 12417.3601 05/31/2020 10849.3286 11768.6793 12475.1769 06/30/2020 10899.527 11778.8685 12553.758 07/31/2020 10943.2475 11816.4937 12741.2746 08/31/2020 10923.2005 11793.494 12638.4313 09/30/2020 10927.1918 11802.2379 12631.4992 10/31/2020 10889.14 11758.6134 12575.0965 11/30/2020 10915.8685 11772.9365 12698.4914 12/31/2020 10933.7434 11776.6839 12715.9864 01/31/2021 10917.9644 11749.0013 12624.817 02/28/2021 10829.7288 11652.297 12442.5048 03/31/2021 10749.7044 11573.8479 12287.1394 04/30/2021 10793.3721 11616.9459 12384.2096 05/31/2021 10805.0446 11653.6973 12424.6696 06/30/2021 10792.7232 11645.1102 12511.9637 07/31/2021 10862.3263 11734.5102 12651.8595 08/31/2021 10841.3885 11715.5827 12627.7727 09/30/2021 10794.2337 11644.8189 12518.4439 10/31/2021 10753.574 11578.486 12514.9938 11/30/2021 10754.9276 11607.6138 12552.0197 12/31/2021 10733.8147 11577.136 12519.9004 01/31/2022 10611.556 11429.4021 12250.172 02/28/2022 10563.4512 11377.7898 12113.503 03/31/2022 10343.8973 11092.2646 11776.9683 04/30/2022 10149.4306 10915.9181 11330.0576 05/31/2022 10224.8523 10989.7403 11403.1101 06/30/2022 10128.8047 10908.8546 11224.2161 07/31/2022 10296.4164 11053.5022 11498.4738 08/31/2022 10084.1475 10833.0607 11173.5652 09/30/2022 9767.4965 10575.795 10690.7981 10/31/2022 9711.1861 10527.7061 10552.327 11/30/2022 9911.1501 10707.7832 10940.3949 12/31/2022 9878.7528 10682.5596 10891.0465 01/31/2023 10075.7362 10852.6772 11226.0979 02/28/2023 9916.7545 10664.59 10935.8444 03/31/2023 10084.6258 10923.7434 11213.6426 04/30/2023 10124.0247 10982.2287 11281.6023 05/31/2023 10067.1139 10901.147 11158.7602 06/30/2023 10003.5249 10800.9641 11118.9646 07/31/2023 10014.4289 10812.7161 11111.2139 08/31/2023 9983.825 10818.6537 11040.24 09/30/2023 9840.2198 10716.6503 10759.6881 10/31/2023 9760.637 10680.952 10589.8898 11/30/2023 10015.2908 10914.5906 11069.4673 12/31/2023 10258.8228 11142.342 11493.195 01/31/2024 10285.0629 11166.7533 11461.6339 02/29/2024 10183.7366 11049.0938 11299.6979 03/31/2024 10244.3234 11103.49 11404.0404 04/30/2024 10081.2122 10953.0281 11115.9877 05/31/2024 10214.2755 11074.7431 11304.4398 06/30/2024 10290.7174 11168.445 11411.4668 07/31/2024 10496.0142 11372.7933 11678.0004 08/31/2024 10611.0962 11495.8302 11845.8158 09/30/2024 10728.8091 11609.4455 12004.424 Effective September 30, 2024, the Fund adopted the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Bloomberg U.S. Government Intermediate Total Return Index Value Unhedged as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Limited Term U.S. Government Fund Class A (with sales charge) 6.62% 0.06% 0.71% Limited Term U.S. Government Fund Class A (without sales charge) 9.03% 0.36% 0.86% Bloomberg U.S. Aggregate Total Return Index Value USD 11.57% 0.33% 1.84% Bloomberg U.S. Government Intermediate Total Return Index Value Unhedged 8.33% 0.84% 1.50%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment and assumes the deduction of the maximum sales charge associated with that investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fgov/LTUSX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 139,700,000
Holdings Count | Holdings	157
Advisory Fees Paid, Amount	$ 600,000
Investment Company, Portfolio Turnover	32.26%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $139.7 Number of Holdings 157 Annual Portfolio Turnover 32.26% Total Advisory Fee $0.6
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Types of Holdings (%) U.S. Treasury Securities 20.0 U.S. Government Agencies 6.6 Mortgage Backed 62.5 Corporate Bonds 2.1 Cash Equivalents & Other 8.8 Types of Holdings (%) U.S. Treasury Securities 20.0% U.S. Government Agencies 6.6% Mortgage Backed 62.5% Corporate Bonds 2.1% Cash Equivalents & Other 8.8% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Limited Term U.S. Government Fund - Class C
Shareholder Report [Line Items]
Class Name	CLASS: C
Trading Symbol	LTUCX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Limited Term U.S. Government Fund Class C Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $129.00 1.24%
Expenses Paid, Amount	$ 129
Expense Ratio, Percent	1.24%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class C shares outperformed the Bloomberg U.S. Government Intermediate Total Return Index Value Unhedged (the “Index”) during the 12-month period ended September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. The Fund’s long duration, compared to the Index, was a relative contributor in this environment. Positive relative returns from the Fund’s allocation to asset-backed securities, collateralized mortgage obligations, and commercial mortgage-backed securities also contributed. There were no meaningful detractors to the Fund’s performance over the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Limited Term U.S. Government Fund Bloomberg U.S. Government Intermediate Total Return Index Value Unhedged Bloomberg U.S. Aggregate Total Return Value Index USD 09/30/2014 10000.0044 10000 10000 10/31/2014 10046.4099 10070.1644 10098.2769 11/30/2014 10078.7817 10120.9308 10169.91 12/31/2014 10044.6334 10094.5925 10179.4256 01/31/2015 10133.6033 10255.4004 10392.8789 02/28/2015 10087.0218 10167.2664 10295.1602 03/31/2015 10109.6649 10220.968 10342.967 04/30/2015 10107.5084 10211.7143 10305.856 05/31/2015 10108.0008 10216.8621 10281.0356 06/30/2015 10083.1734 10177.0746 10168.9318 07/31/2015 10095.9073 10218.0552 10239.6187 08/31/2015 10100.5464 10223.7071 10224.9146 09/30/2015 10133.7177 10299.8931 10294.0811 10/31/2015 10109.7822 10267.1468 10295.7875 11/30/2015 10084.1504 10233.2913 10268.5908 12/31/2015 10044.1718 10213.8093 10235.4031 01/31/2016 10160.4593 10375.9447 10376.2558 02/29/2016 10182.4856 10427.2264 10449.8664 03/31/2016 10202.0166 10446.9605 10545.7404 04/30/2016 10205.768 10443.9861 10586.2218 05/31/2016 10188.8449 10429.0917 10588.9383 06/30/2016 10264.4526 10576.8705 10779.1979 07/31/2016 10254.7085 10580.7748 10847.3436 08/31/2016 10236.4466 10533.246 10834.9414 09/30/2016 10248.1573 10551.2324 10828.5941 10/31/2016 10232.1688 10500.7461 10745.7655 11/30/2016 10126.0918 10324.3045 10491.5864 12/31/2016 10114.8246 10321.4869 10506.3861 01/31/2017 10121.5683 10342.0668 10527.0016 02/28/2017 10138.0669 10371.9788 10597.7522 03/31/2017 10127.6493 10377.1322 10592.197 04/30/2017 10154.0403 10431.506 10673.9358 05/31/2017 10186.0031 10472.509 10756.0945 06/30/2017 10150.0122 10445.1736 10745.2712 07/31/2017 10174.5006 10478.4858 10791.5097 08/31/2017 10213.8548 10542.27 10888.3034 09/30/2017 10173.8883 10481.1129 10836.4459 10/31/2017 10161.7901 10467.9045 10842.724 11/30/2017 10136.7155 10436.0096 10828.8068 12/31/2017 10144.3133 10438.6871 10878.506 01/31/2018 10067.0826 10339.3165 10753.2186 02/28/2018 10044.5731 10308.9283 10651.2843 03/31/2018 10074.5042 10362.5739 10719.5896 04/30/2018 10041.7009 10303.7974 10639.8655 05/31/2018 10092.757 10370.2928 10715.7993 06/30/2018 10075.7197 10369.1445 10702.6209 07/31/2018 10058.849 10348.9063 10705.1619 08/31/2018 10102.0982 10410.3267 10774.0467 09/30/2018 10064.5095 10357.6278 10704.6676 10/31/2018 10043.4735 10361.6441 10620.0741 11/30/2018 10094.7686 10432.5927 10683.4727 12/31/2018 10194.2756 10587.519 10879.7393 01/31/2019 10233.1382 10632.7567 10995.2773 02/28/2019 10233.1439 10625.3739 10988.9087 03/31/2019 10317.5155 10754.931 11199.9166 04/30/2019 10316.1514 10759.8771 11202.782 05/31/2019 10418.168 10917.1224 11401.6482 06/30/2019 10456.7057 11007.0825 11544.8346 07/31/2019 10446.0972 10987.8862 11570.2238 08/31/2019 10546.0186 11185.5127 11870.0302 09/30/2019 10527.4658 11136.4716 11806.8123 10/31/2019 10549.3379 11168.5514 11842.3764 11/30/2019 10538.3311 11141.3729 11836.3427 12/31/2019 10527.2256 11138.0904 11828.0976 01/31/2020 10635.0697 11295.1397 12055.7234 02/29/2020 10727.2276 11480.5774 12272.7065 03/31/2020 10715.881 11714.8825 12200.4833 04/30/2020 10792.8086 11747.2424 12417.3601 05/31/2020 10825.9811 11768.6793 12475.1769 06/30/2020 10873.6171 11778.8685 12553.758 07/31/2020 10914.6074 11816.4937 12741.2746 08/31/2020 10892.3539 11793.494 12638.4313 09/30/2020 10893.9991 11802.2379 12631.4992 10/31/2020 10853.3434 11758.6134 12575.0965 11/30/2020 10876.7758 11772.9365 12698.4914 12/31/2020 10891.0988 11776.6839 12715.9864 01/31/2021 10872.157 11749.0013 12624.817 02/28/2021 10781.793 11652.297 12442.5048 03/31/2021 10699.2158 11573.8479 12287.1394 04/30/2021 10731.2964 11616.9459 12384.2096 05/31/2021 10747.7881 11653.6973 12424.6696 06/30/2021 10732.105 11645.1102 12511.9637 07/31/2021 10797.107 11734.5102 12651.8595 08/31/2021 10772.4512 11715.5827 12627.7727 09/30/2021 10714.0931 11644.8189 12518.4439 10/31/2021 10678.7344 11578.486 12514.9938 11/30/2021 10676.8569 11607.6138 12552.0197 12/31/2021 10652.7677 11577.136 12519.9004 01/31/2022 10520.9589 11429.4021 12250.172 02/28/2022 10479.168 11377.7898 12113.503 03/31/2022 10259.9772 11092.2646 11776.9683 04/30/2022 10066.2589 10915.9181 11330.0576 05/31/2022 10130.3403 10989.7403 11403.1101 06/30/2022 10033.8046 10908.8546 11224.2161 07/31/2022 10196.2175 11053.5022 11498.4738 08/31/2022 9984.5812 10833.0607 11173.5652 09/30/2022 9670.4459 10575.795 10690.7981 10/31/2022 9612.509 10527.7061 10552.327 11/30/2022 9806.8585 10707.7832 10940.3949 12/31/2022 9763.9826 10682.5596 10891.0465 01/31/2023 9963.4359 10852.6772 11226.0979 02/28/2023 9796.6314 10664.59 10935.8444 03/31/2023 9967.6355 10923.7434 11213.6426 04/30/2023 9995.7033 10982.2287 11281.6023 05/31/2023 9945.7909 10901.147 11158.7602 06/30/2023 9881.0963 10800.9641 11118.9646 07/31/2023 9889.6036 10812.7161 11111.2139 08/31/2023 9857.5145 10818.6537 11040.24 09/30/2023 9706.294 10716.6503 10759.6881 10/31/2023 9634.4727 10680.952 10589.8898 11/30/2023 9882.1944 10914.5906 11069.4673 12/31/2023 10118.8298 11142.342 11493.195 01/31/2024 10134.0309 11166.7533 11461.6339 02/29/2024 10041.2922 11049.0938 11299.6979 03/31/2024 10090.3694 11103.49 11404.0404 04/30/2024 9928.8269 10953.0281 11115.9877 05/31/2024 10057.4813 11074.7431 11304.4398 06/30/2024 10139.0435 11168.445 11411.4668 07/31/2024 10329.4392 11372.7933 11678.0004 08/31/2024 10440.0358 11495.8302 11845.8158 09/30/2024 10561.8919 11609.4455 12004.424 Effective September 30, 2024, the Fund adopted the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Bloomberg U.S. Government Intermediate Total Return Index Value Unhedged as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Limited Term U.S. Government Fund Class C (with sales charge) 8.32% 0.07% 0.55% Limited Term U.S. Government Fund Class C (without sales charge) 8.82% 0.07% 0.55% Bloomberg U.S. Aggregate Total Return Index Value USD 11.57% 0.33% 1.84% Bloomberg U.S. Government Intermediate Total Return Index Value Unhedged 8.33% 0.84% 1.50%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fgov/LTUCX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 139,700,000
Holdings Count | Holdings	157
Advisory Fees Paid, Amount	$ 600,000
Investment Company, Portfolio Turnover	32.26%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $139.7 Number of Holdings 157 Annual Portfolio Turnover 32.26% Total Advisory Fee $0.6
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Types of Holdings (%) U.S. Treasury Securities 20.0 U.S. Government Agencies 6.6 Mortgage Backed 62.5 Corporate Bonds 2.1 Cash Equivalents & Other 8.8 Types of Holdings (%) U.S. Treasury Securities 20.0% U.S. Government Agencies 6.6% Mortgage Backed 62.5% Corporate Bonds 2.1% Cash Equivalents & Other 8.8% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Limited Term U.S. Government Fund - Class C2
Shareholder Report [Line Items]
Class Name	CLASS: C2
Trading Symbol	LTUQX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Limited Term U.S. Government Fund Class C2 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C2 $130.00 1.24%
Expenses Paid, Amount	$ 130
Expense Ratio, Percent	1.24%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class C2 shares outperformed the Bloomberg U.S. Government Intermediate Total Return Index Value Unhedged (the “Index”) during the 12-month period ended September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. The Fund’s long duration, compared to the Index, was a relative contributor in this environment. Positive relative returns from the Fund’s allocation to asset-backed securities, collateralized mortgage obligations, and commercial mortgage-backed securities also contributed. There were no meaningful detractors to the Fund’s performance over the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Limited Term U.S. Government Fund Bloomberg U.S. Government Intermediate Total Return Index Value Unhedged Bloomberg U.S. Aggregate Total Return Value Index USD 09/30/2020 9999.9993 10000 10000 10/31/2020 9962.9134 9963.0371 9955.3475 11/30/2020 9984.1042 9975.173 10053.0358 12/31/2020 9997.104 9978.3481 10066.8861 01/31/2021 9979.1274 9954.8927 9994.7099 02/28/2021 9896.1365 9872.9555 9850.3785 03/31/2021 9819.6047 9806.4859 9727.3801 04/30/2021 9856.1792 9843.0026 9804.2278 05/31/2021 9863.7089 9874.142 9836.2589 06/30/2021 9849.6117 9866.8662 9905.3671 07/31/2021 9909.781 9942.6145 10016.1187 08/31/2021 9887.7246 9926.5773 9997.0498 09/30/2021 9842.1622 9866.6194 9910.4973 10/31/2021 9802.2305 9810.4157 9907.766 11/30/2021 9800.5134 9835.0956 9937.0783 12/31/2021 9778.4808 9809.2719 9911.6504 01/31/2022 9665.0096 9684.0973 9698.114 02/28/2022 9618.9824 9640.3664 9589.917 03/31/2022 9417.8069 9398.4418 9323.4921 04/30/2022 9239.9971 9249.024 8969.6856 05/31/2022 9306.3591 9311.5733 9027.5191 06/30/2022 9210.2192 9243.0391 8885.8938 07/31/2022 9366.4559 9365.5985 9103.0159 08/31/2022 9164.6489 9178.8191 8845.795 09/30/2022 8876.3088 8960.8387 8463.6019 10/31/2022 8823.1111 8920.0931 8353.9783 11/30/2022 9001.7103 9072.6719 8661.2006 12/31/2022 8970.0796 9051.3 8622.1329 01/31/2023 9145.615 9195.4401 8887.3836 02/28/2023 9000.1294 9036.0744 8657.5981 03/31/2023 9149.4734 9255.6543 8877.5231 04/30/2023 9182.916 9305.2087 8931.3249 05/31/2023 9129.4557 9236.5084 8834.0742 06/30/2023 9070.0682 9151.6238 8802.5692 07/31/2023 9077.8934 9161.5812 8796.4332 08/31/2023 9048.3937 9166.6121 8740.2452 09/30/2023 8909.5032 9080.185 8518.1402 10/31/2023 8851.0022 9049.9379 8383.7157 11/30/2023 9078.4 9247.8991 8763.3836 12/31/2023 9295.5908 9440.8722 9098.8368 01/31/2024 9309.5717 9461.5558 9073.8508 02/29/2024 9224.4966 9361.8633 8945.6507 03/31/2024 9269.5916 9407.953 9028.2556 04/30/2024 9121.3326 9280.4671 8800.2124 05/31/2024 9239.45 9383.5958 8949.4047 06/30/2024 9314.3978 9462.9892 9034.1349 07/31/2024 9489.2778 9636.1329 9245.142 08/31/2024 9590.8577 9740.3817 9377.9967 09/30/2024 9702.6988 9836.6476 9503.5623 Effective September 30, 2024, the Fund adopted the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Bloomberg U.S. Government Intermediate Total Return Index Value Unhedged as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year Limited Term U.S. Government Fund Class C2 (with sales charge) 8.25% Limited Term U.S. Government Fund Class C2 (without sales charge) 8.90% Bloomberg U.S. Aggregate Total Return Index Value USD 11.57% Bloomberg U.S. Government Intermediate Total Return Index Value Unhedged 8.33%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 139,700,000
Holdings Count | Holdings	157
Advisory Fees Paid, Amount	$ 600,000
Investment Company, Portfolio Turnover	32.26%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $139.7 Number of Holdings 157 Annual Portfolio Turnover 32.26% Total Advisory Fee $0.6
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Types of Holdings (%) U.S. Treasury Securities 20.0 U.S. Government Agencies 6.6 Mortgage Backed 62.5 Corporate Bonds 2.1 Cash Equivalents & Other 8.8 Types of Holdings (%) U.S. Treasury Securities 20.0% U.S. Government Agencies 6.6% Mortgage Backed 62.5% Corporate Bonds 2.1% Cash Equivalents & Other 8.8% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Limited Term U.S. Government Fund - Class I
Shareholder Report [Line Items]
Class Name	CLASS: I
Trading Symbol	LTUIX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Limited Term U.S. Government Fund Class I Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $68.00 0.65%
Expenses Paid, Amount	$ 68
Expense Ratio, Percent	0.65%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class I shares outperformed the Bloomberg U.S. Government Intermediate Total Return Index Value Unhedged (the “Index”) during the 12-month period ended September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. The Fund’s long duration, compared to the Index, was a relative contributor in this environment. Positive relative returns from the Fund’s allocation to asset-backed securities, collateralized mortgage obligations, and commercial mortgage-backed securities also contributed. There were no meaningful detractors to the Fund’s performance over the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Limited Term U.S. Government Fund Bloomberg U.S. Government Intermediate Total Return Index Value Unhedged Bloomberg U.S. Aggregate Total Return Value Index USD 09/30/2014 10000.0066 10000 10000 10/31/2014 10051.6854 10070.1644 10098.2769 11/30/2014 10089.3704 10120.9308 10169.91 12/31/2014 10059.9737 10094.5925 10179.4256 01/31/2015 10146.9075 10255.4004 10392.8789 02/28/2015 10111.7002 10167.2664 10295.1602 03/31/2015 10139.2379 10220.968 10342.967 04/30/2015 10141.4746 10211.7143 10305.856 05/31/2015 10146.6492 10216.8621 10281.0356 06/30/2015 10126.3757 10177.0746 10168.9318 07/31/2015 10144.3688 10218.0552 10239.6187 08/31/2015 10153.9324 10223.7071 10224.9146 09/30/2015 10192.5775 10299.8931 10294.0811 10/31/2015 10173.5303 10267.1468 10295.7875 11/30/2015 10153.2394 10233.2913 10268.5908 12/31/2015 10117.9047 10213.8093 10235.4031 01/31/2016 10241.0443 10375.9447 10376.2558 02/29/2016 10268.4189 10427.2264 10449.8664 03/31/2016 10293.6069 10446.9605 10545.7404 04/30/2016 10302.682 10443.9861 10586.2218 05/31/2016 10290.2808 10429.0917 10588.9383 06/30/2016 10372.3632 10576.8705 10779.1979 07/31/2016 10367.696 10580.7748 10847.3436 08/31/2016 10354.395 10533.246 10834.9414 09/30/2016 10378.6153 10551.2324 10828.5941 10/31/2016 10359.9588 10500.7461 10745.7655 11/30/2016 10257.2053 10324.3045 10491.5864 12/31/2016 10251.07 10321.4869 10506.3861 01/31/2017 10263.4058 10342.0668 10527.0016 02/28/2017 10285.1487 10371.9788 10597.7522 03/31/2017 10279.954 10377.1322 10592.197 04/30/2017 10319.9922 10431.506 10673.9358 05/31/2017 10350.3291 10472.509 10756.0945 06/30/2017 10319.0636 10445.1736 10745.2712 07/31/2017 10349.6899 10478.4858 10791.5097 08/31/2017 10395.6166 10542.27 10888.3034 09/30/2017 10360.1102 10481.1129 10836.4459 10/31/2017 10353.3153 10467.9045 10842.724 11/30/2017 10341.0398 10436.0096 10828.8068 12/31/2017 10346.5343 10438.6871 10878.506 01/31/2018 10280.8971 10339.3165 10753.2186 02/28/2018 10254.4164 10308.9283 10651.2843 03/31/2018 10298.3177 10362.5739 10719.5896 04/30/2018 10261.6368 10303.7974 10639.8655 05/31/2018 10319.4069 10370.2928 10715.7993 06/30/2018 10315.0181 10369.1445 10702.6209 07/31/2018 10295.011 10348.9063 10705.1619 08/31/2018 10344.8655 10410.3267 10774.0467 09/30/2018 10311.6783 10357.6278 10704.6676 10/31/2018 10295.3543 10361.6441 10620.0741 11/30/2018 10353.4337 10432.5927 10683.4727 12/31/2018 10461.4658 10587.519 10879.7393 01/31/2019 10515.2233 10632.7567 10995.2773 02/28/2019 10520.1536 10625.3739 10988.9087 03/31/2019 10604.6559 10754.931 11199.9166 04/30/2019 10616.6612 10759.8771 11202.782 05/31/2019 10719.4181 10917.1224 11401.6482 06/30/2019 10764.6449 11007.0825 11544.8346 07/31/2019 10767.6923 10987.8862 11570.2238 08/31/2019 10868.8433 11185.5127 11870.0302 09/30/2019 10863.5418 11136.4716 11806.8123 10/31/2019 10882.9953 11168.5514 11842.3764 11/30/2019 10876.4096 11141.3729 11836.3427 12/31/2019 10870.1049 11138.0904 11828.0976 01/31/2020 10987.3235 11295.1397 12055.7234 02/29/2020 11088.012 11480.5774 12272.7065 03/31/2020 11081.4612 11714.8825 12200.4833 04/30/2020 11166.6108 11747.2424 12417.3601 05/31/2020 11206.4271 11768.6793 12475.1769 06/30/2020 11261.2042 11778.8685 12553.758 07/31/2020 11309.0001 11816.4937 12741.2746 08/31/2020 11290.93 11793.494 12638.4313 09/30/2020 11297.6438 11802.2379 12631.4992 10/31/2020 11260.9411 11758.6134 12575.0965 11/30/2020 11291.1494 11772.9365 12698.4914 12/31/2020 11312.2426 11776.6839 12715.9864 01/31/2021 11298.4236 11749.0013 12624.817 02/28/2021 11209.374 11652.297 12442.5048 03/31/2021 11128.6206 11573.8479 12287.1394 04/30/2021 11176.256 11616.9459 12384.2096 05/31/2021 11190.8434 11653.6973 12424.6696 06/30/2021 11180.4832 11645.1102 12511.9637 07/31/2021 11254.9503 11734.5102 12651.8595 08/31/2021 11235.5773 11715.5827 12627.7727 09/30/2021 11188.7893 11644.8189 12518.4439 10/31/2021 11149.281 11578.486 12514.9938 11/30/2021 11153.24 11607.6138 12552.0197 12/31/2021 11133.9826 11577.136 12519.9004 01/31/2022 11009.8111 11429.4021 12250.172 02/28/2022 10962.3631 11377.7898 12113.503 03/31/2022 10737.2128 11092.2646 11776.9683 04/30/2022 10538.1697 10915.9181 11330.0576 05/31/2022 10619.3423 10989.7403 11403.1101 06/30/2022 10522.3504 10908.8546 11224.2161 07/31/2022 10699.0765 11053.5022 11498.4738 08/31/2022 10481.1495 10833.0607 11173.5652 09/30/2022 10154.573 10575.795 10690.7981 10/31/2022 10098.6542 10527.7061 10552.327 11/30/2022 10309.2434 10707.7832 10940.3949 12/31/2022 10269.2016 10682.5596 10891.0465 01/31/2023 10485.2782 10852.6772 11226.0979 02/28/2023 10322.0076 10664.59 10935.8444 03/31/2023 10499.1652 10923.7434 11213.6426 04/30/2023 10533.9186 10982.2287 11281.6023 05/31/2023 10486.0605 10901.147 11158.7602 06/30/2023 10422.2672 10800.9641 11118.9646 07/31/2023 10436.4508 10812.7161 11111.2139 08/31/2023 10407.5044 10818.6537 11040.24 09/30/2023 10251.7942 10716.6503 10759.6881 10/31/2023 10180.4685 10680.952 10589.8898 11/30/2023 10448.7642 10914.5906 11069.4673 12/31/2023 10705.6609 11142.342 11493.195 01/31/2024 10736.0491 11166.7533 11461.6339 02/29/2024 10633.1333 11049.0938 11299.6979 03/31/2024 10690.4528 11103.49 11404.0404 04/30/2024 10523.158 10953.0281 11115.9877 05/31/2024 10674.4716 11074.7431 11304.4398 06/30/2024 10757.3542 11168.445 11411.4668 07/31/2024 10975.0416 11372.7933 11678.0004 08/31/2024 11098.4879 11495.8302 11845.8158 09/30/2024 11224.6251 11609.4455 12004.424 Effective September 30, 2024, the Fund adopted the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Bloomberg U.S. Government Intermediate Total Return Index Value Unhedged as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Limited Term U.S. Government Fund Class I 9.49% 0.66% 1.16% Bloomberg U.S. Aggregate Total Return Index Value USD 11.57% 0.33% 1.84% Bloomberg U.S. Government Intermediate Total Return Index Value Unhedged 8.33% 0.84% 1.50%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fgov/LTUIX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 139,700,000
Holdings Count | Holdings	157
Advisory Fees Paid, Amount	$ 600,000
Investment Company, Portfolio Turnover	32.26%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $139.7 Number of Holdings 157 Annual Portfolio Turnover 32.26% Total Advisory Fee $0.6
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Types of Holdings (%) U.S. Treasury Securities 20.0 U.S. Government Agencies 6.6 Mortgage Backed 62.5 Corporate Bonds 2.1 Cash Equivalents & Other 8.8 Types of Holdings (%) U.S. Treasury Securities 20.0% U.S. Government Agencies 6.6% Mortgage Backed 62.5% Corporate Bonds 2.1% Cash Equivalents & Other 8.8% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Limited Term U.S. Government Fund - Class R3
Shareholder Report [Line Items]
Class Name	CLASS: R3
Trading Symbol	LTURX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Limited Term U.S. Government Fund Class R3 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R3 $103.00 0.99%
Expenses Paid, Amount	$ 103
Expense Ratio, Percent	0.99%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R3 shares outperformed the Bloomberg U.S. Government Intermediate Total Return Index Value Unhedged (the “Index”) during the 12-month period ended September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. The Fund’s long duration, compared to the Index, was a relative contributor in this environment. Positive relative returns from the Fund’s allocation to asset-backed securities, collateralized mortgage obligations, and commercial mortgage-backed securities also contributed. There were no meaningful detractors to the Fund’s performance over the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Limited Term U.S. Government Fund Bloomberg U.S. Government Intermediate Total Return Index Value Unhedged Bloomberg U.S. Aggregate Total Return Value Index USD 09/30/2014 9999.9994 10000 10000 10/31/2014 10048.315 10070.1644 10098.2769 11/30/2014 10082.8256 10120.9308 10169.91 12/31/2014 10042.736 10094.5925 10179.4256 01/31/2015 10133.7176 10255.4004 10392.8789 02/28/2015 10095.894 10167.2664 10295.1602 03/31/2015 10120.4577 10220.968 10342.967 04/30/2015 10119.5636 10211.7143 10305.856 05/31/2015 10114.1552 10216.8621 10281.0356 06/30/2015 10090.9322 10177.0746 10168.9318 07/31/2015 10113.2347 10218.0552 10239.6187 08/31/2015 10119.9808 10223.7071 10224.9146 09/30/2015 10155.0666 10299.8931 10294.0811 10/31/2015 10132.6189 10267.1468 10295.7875 11/30/2015 10108.8292 10233.2913 10268.5908 12/31/2015 10070.1379 10213.8093 10235.4031 01/31/2016 10181.353 10375.9447 10376.2558 02/29/2016 10205.0281 10427.2264 10449.8664 03/31/2016 10234.2968 10446.9605 10545.7404 04/30/2016 10239.6635 10443.9861 10586.2218 05/31/2016 10224.2987 10429.0917 10588.9383 06/30/2016 10294.6195 10576.8705 10779.1979 07/31/2016 10294.3011 10580.7748 10847.3436 08/31/2016 10277.5347 10533.246 10834.9414 09/30/2016 10290.8738 10551.2324 10828.5941 10/31/2016 10268.8994 10500.7461 10745.7655 11/30/2016 10163.8463 10324.3045 10491.5864 12/31/2016 10162.1003 10321.4869 10506.3861 01/31/2017 10170.922 10342.0668 10527.0016 02/28/2017 10189.3467 10371.9788 10597.7522 03/31/2017 10180.8211 10377.1322 10592.197 04/30/2017 10209.5892 10431.506 10673.9358 05/31/2017 10243.9159 10472.509 10756.0945 06/30/2017 10209.8804 10445.1736 10745.2712 07/31/2017 10236.7651 10478.4858 10791.5097 08/31/2017 10278.6433 10542.27 10888.3034 09/30/2017 10242.6387 10481.1129 10836.4459 10/31/2017 10232.4049 10467.9045 10842.724 11/30/2017 10209.0518 10436.0096 10828.8068 12/31/2017 10218.8603 10438.6871 10878.506 01/31/2018 10150.6492 10339.3165 10753.2186 02/28/2018 10123.8989 10308.9283 10651.2843 03/31/2018 10161.9268 10362.5739 10719.5896 04/30/2018 10122.582 10303.7974 10639.8655 05/31/2018 10176.2688 10370.2928 10715.7993 06/30/2018 10168.6871 10369.1445 10702.6209 07/31/2018 10145.6755 10348.9063 10705.1619 08/31/2018 10191.4375 10410.3267 10774.0467 09/30/2018 10155.7328 10357.6278 10704.6676 10/31/2018 10136.4822 10361.6441 10620.0741 11/30/2018 10190.5603 10432.5927 10683.4727 12/31/2018 10293.5882 10587.519 10879.7393 01/31/2019 10343.22 10632.7567 10995.2773 02/28/2019 10337.1311 10625.3739 10988.9087 03/31/2019 10424.9687 10754.931 11199.9166 04/30/2019 10433.6954 10759.8771 11202.782 05/31/2019 10531.4324 10917.1224 11401.6482 06/30/2019 10572.6969 11007.0825 11544.8346 07/31/2019 10564.0725 10987.8862 11570.2238 08/31/2019 10667.8667 11185.5127 11870.0302 09/30/2019 10651.1253 11136.4716 11806.8123 10/31/2019 10674.8962 11168.5514 11842.3764 11/30/2019 10665.0919 11141.3729 11836.3427 12/31/2019 10655.4685 11138.0904 11828.0976 01/31/2020 10758.5632 11295.1397 12055.7234 02/29/2020 10861.9727 11480.5774 12272.7065 03/31/2020 10851.8615 11714.8825 12200.4833 04/30/2020 10931.8172 11747.2424 12417.3601 05/31/2020 10967.2119 11768.6793 12475.1769 06/30/2020 11017.212 11778.8685 12553.758 07/31/2020 11052.0573 11816.4937 12741.2746 08/31/2020 11038.9334 11793.494 12638.4313 09/30/2020 11042.1171 11802.2379 12631.4992 10/31/2020 11002.422 11758.6134 12575.0965 11/30/2020 11028.1279 11772.9365 12698.4914 12/31/2020 11044.9258 11776.6839 12715.9864 01/31/2021 11027.6824 11749.0013 12624.817 02/28/2021 10937.6422 11652.297 12442.5048 03/31/2021 10855.8652 11573.8479 12287.1394 04/30/2021 10890.5078 11616.9459 12384.2096 05/31/2021 10909.4324 11653.6973 12424.6696 06/30/2021 10895.9832 11645.1102 12511.9637 07/31/2021 10965.1801 11734.5102 12651.8595 08/31/2021 10943.0314 11715.5827 12627.7727 09/30/2021 10886.2283 11644.8189 12518.4439 10/31/2021 10852.3826 11578.486 12514.9938 11/30/2021 10852.634 11607.6138 12552.0197 12/31/2021 10830.2702 11577.136 12519.9004 01/31/2022 10706.0736 11429.4021 12250.172 02/28/2022 10656.945 11377.7898 12113.503 03/31/2022 10434.9924 11092.2646 11776.9683 04/30/2022 10238.9232 10915.9181 11330.0576 05/31/2022 10314.9718 10989.7403 11403.1101 06/30/2022 10218.2016 10908.8546 11224.2161 07/31/2022 10386.4992 11053.5022 11498.4738 08/31/2022 10171.9579 10833.0607 11173.5652 09/30/2022 9852.3351 10575.795 10690.7981 10/31/2022 9795 10527.7061 10552.327 11/30/2022 9996.0808 10707.7832 10940.3949 12/31/2022 9962.723 10682.5596 10891.0465 01/31/2023 10160.7265 10852.6772 11226.0979 02/28/2023 10000.1782 10664.59 10935.8444 03/31/2023 10177.5307 10923.7434 11213.6426 04/30/2023 10208.294 10982.2287 11281.6023 05/31/2023 10150.627 10901.147 11158.7602 06/30/2023 10094.8428 10800.9641 11118.9646 07/31/2023 10097.0574 10812.7161 11111.2139 08/31/2023 10066.2094 10818.6537 11040.24 09/30/2023 9921.592 10716.6503 10759.6881 10/31/2023 9849.8338 10680.952 10589.8898 11/30/2023 10106.1769 10914.5906 11069.4673 12/31/2023 10351.2788 11142.342 11493.195 01/31/2024 10369.0127 11166.7533 11461.6339 02/29/2024 10275.7293 11049.0938 11299.6979 03/31/2024 10328.1757 11103.49 11404.0404 04/30/2024 10164.0939 10953.0281 11115.9877 05/31/2024 10298.4298 11074.7431 11304.4398 06/30/2024 10384.3998 11168.445 11411.4668 07/31/2024 10582.509 11372.7933 11678.0004 08/31/2024 10698.5498 11495.8302 11845.8158 09/30/2024 10817.2642 11609.4455 12004.424 Effective September 30, 2024, the Fund adopted the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Bloomberg U.S. Government Intermediate Total Return Index Value Unhedged as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Limited Term U.S. Government Fund Class R3 9.03% 0.31% 0.79% Bloomberg U.S. Aggregate Total Return Index Value USD 11.57% 0.33% 1.84% Bloomberg U.S. Government Intermediate Total Return Index Value Unhedged 8.33% 0.84% 1.50%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fgov/LTURX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 139,700,000
Holdings Count | Holdings	157
Advisory Fees Paid, Amount	$ 600,000
Investment Company, Portfolio Turnover	32.26%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $139.7 Number of Holdings 157 Annual Portfolio Turnover 32.26% Total Advisory Fee $0.6
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Types of Holdings (%) U.S. Treasury Securities 20.0 U.S. Government Agencies 6.6 Mortgage Backed 62.5 Corporate Bonds 2.1 Cash Equivalents & Other 8.8 Types of Holdings (%) U.S. Treasury Securities 20.0% U.S. Government Agencies 6.6% Mortgage Backed 62.5% Corporate Bonds 2.1% Cash Equivalents & Other 8.8% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Limited Term U.S. Government Fund - Class R4
Shareholder Report [Line Items]
Class Name	CLASS: R4
Trading Symbol	LTUGX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Limited Term U.S. Government Fund Class R4 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R4 $103.00 0.99%
Expenses Paid, Amount	$ 103
Expense Ratio, Percent	0.99%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R4 shares outperformed the Bloomberg U.S. Government Intermediate Total Return Index Value Unhedged (the “Index”) during the 12-month period ended September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. The Fund’s long duration, compared to the Index, was a relative contributor in this environment. Positive relative returns from the Fund’s allocation to asset-backed securities, collateralized mortgage obligations, and commercial mortgage-backed securities also contributed. There were no meaningful detractors to the Fund’s performance over the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Limited Term U.S. Government Fund Bloomberg U.S. Government Intermediate Total Return Index Value Unhedged Bloomberg U.S. Aggregate Total Return Value Index USD 09/30/2014 10000.0066 10000 10000 10/31/2014 10048.4777 10070.1644 10098.2769 11/30/2014 10075.4078 10120.9308 10169.91 12/31/2014 10042.8058 10094.5925 10179.4256 01/31/2015 10133.8583 10255.4004 10392.8789 02/28/2015 10096.0077 10167.2664 10295.1602 03/31/2015 10120.6425 10220.968 10342.967 04/30/2015 10112.2294 10211.7143 10305.856 05/31/2015 10114.4995 10216.8621 10281.0356 06/30/2015 10091.209 10177.0746 10168.9318 07/31/2015 10113.5329 10218.0552 10239.6187 08/31/2015 10120.2885 10223.7071 10224.9146 09/30/2015 10155.3964 10299.8931 10294.0811 10/31/2015 10132.9317 10267.1468 10295.7875 11/30/2015 10109.1259 10233.2913 10268.5908 12/31/2015 10070.3941 10213.8093 10235.4031 01/31/2016 10181.6792 10375.9447 10376.2558 02/29/2016 10205.3601 10427.2264 10449.8664 03/31/2016 10234.6437 10446.9605 10545.7404 04/30/2016 10240.0078 10443.9861 10586.2218 05/31/2016 10224.6732 10429.0917 10588.9383 06/30/2016 10294.9182 10576.8705 10779.1979 07/31/2016 10294.5896 10580.7748 10847.3436 08/31/2016 10277.8016 10533.246 10834.9414 09/30/2016 10290.586 10551.2324 10828.5941 10/31/2016 10268.5821 10500.7461 10745.7655 11/30/2016 10163.4487 10324.3045 10491.5864 12/31/2016 10161.6938 10321.4869 10506.3861 01/31/2017 10170.5089 10342.0668 10527.0016 02/28/2017 10181.1365 10371.9788 10597.7522 03/31/2017 10180.2989 10377.1322 10592.197 04/30/2017 10209.1334 10431.506 10673.9358 05/31/2017 10243.4818 10472.509 10756.0945 06/30/2017 10209.1552 10445.1736 10745.2712 07/31/2017 10236.0553 10478.4858 10791.5097 08/31/2017 10277.9474 10542.27 10888.3034 09/30/2017 10239.9368 10481.1129 10836.4459 10/31/2017 10229.6678 10467.9045 10842.724 11/30/2017 10206.2955 10436.0096 10828.8068 12/31/2017 10216.1223 10438.6871 10878.506 01/31/2018 10147.8885 10339.3165 10753.2186 02/28/2018 10121.0443 10308.9283 10651.2843 03/31/2018 10159.2395 10362.5739 10719.5896 04/30/2018 10119.8661 10303.7974 10639.8655 05/31/2018 10173.5369 10370.2928 10715.7993 06/30/2018 10165.943 10369.1445 10702.6209 07/31/2018 10142.9232 10348.9063 10705.1619 08/31/2018 10188.678 10410.3267 10774.0467 09/30/2018 10152.8629 10357.6278 10704.6676 10/31/2018 10133.5608 10361.6441 10620.0741 11/30/2018 10187.6479 10432.5927 10683.4727 12/31/2018 10290.7342 10587.519 10879.7393 01/31/2019 10340.3916 10632.7567 10995.2773 02/28/2019 10334.1584 10625.3739 10988.9087 03/31/2019 10422.0326 10754.931 11199.9166 04/30/2019 10422.7078 10759.8771 11202.782 05/31/2019 10528.5579 10917.1224 11401.6482 06/30/2019 10569.8214 11007.0825 11544.8346 07/31/2019 10561.199 10987.8862 11570.2238 08/31/2019 10665.0263 11185.5127 11870.0302 09/30/2019 10648.2569 11136.4716 11806.8123 10/31/2019 10672.0198 11168.5514 11842.3764 11/30/2019 10662.2054 11141.3729 11836.3427 12/31/2019 10652.5716 11138.0904 11828.0976 01/31/2020 10755.7269 11295.1397 12055.7234 02/29/2020 10851.0345 11480.5774 12272.7065 03/31/2020 10849.116 11714.8825 12200.4833 04/30/2020 10929.0939 11747.2424 12417.3601 05/31/2020 10964.4928 11768.6793 12475.1769 06/30/2020 11014.5738 11778.8685 12553.758 07/31/2020 11049.4241 11816.4937 12741.2746 08/31/2020 11036.2656 11793.494 12638.4313 09/30/2020 11031.1859 11802.2379 12631.4992 10/31/2020 10999.696 11758.6134 12575.0965 11/30/2020 11025.4033 11772.9365 12698.4914 12/31/2020 11042.1855 11776.6839 12715.9864 01/31/2021 11025.004 11749.0013 12624.817 02/28/2021 10934.8404 11652.297 12442.5048 03/31/2021 10853.0237 11573.8479 12287.1394 04/30/2021 10887.7107 11616.9459 12384.2096 05/31/2021 10898.3379 11653.6973 12424.6696 06/30/2021 10893.1609 11645.1102 12511.9637 07/31/2021 10962.3129 11734.5102 12651.8595 08/31/2021 10940.1523 11715.5827 12627.7727 09/30/2021 10883.3085 11644.8189 12518.4439 10/31/2021 10849.462 11578.486 12514.9938 11/30/2021 10849.7416 11607.6138 12552.0197 12/31/2021 10827.3525 11577.136 12519.9004 01/31/2022 10694.8024 11429.4021 12250.172 02/28/2022 10654.0049 11377.7898 12113.503 03/31/2022 10431.9476 11092.2646 11776.9683 04/30/2022 10235.7236 10915.9181 11330.0576 05/31/2022 10311.8002 10989.7403 11403.1101 06/30/2022 10214.9277 10908.8546 11224.2161 07/31/2022 10383.1896 11053.5022 11498.4738 08/31/2022 10160.0733 10833.0607 11173.5652 09/30/2022 9848.7553 10575.795 10690.7981 10/31/2022 9791.2853 10527.7061 10552.327 11/30/2022 9983.9849 10707.7832 10940.3949 12/31/2022 9950.5725 10682.5596 10891.0465 01/31/2023 10148.6601 10852.6772 11226.0979 02/28/2023 9988.0129 10664.59 10935.8444 03/31/2023 10165.3994 10923.7434 11213.6426 04/30/2023 10196.1058 10982.2287 11281.6023 05/31/2023 10138.3928 10901.147 11158.7602 06/30/2023 10082.5585 10800.9641 11118.9646 07/31/2023 10084.7553 10812.7161 11111.2139 08/31/2023 10053.87 10818.6537 11040.24 09/30/2023 9909.1624 10716.6503 10759.6881 10/31/2023 9837.351 10680.952 10589.8898 11/30/2023 10093.7817 10914.5906 11069.4673 12/31/2023 10338.9733 11142.342 11493.195 01/31/2024 10356.6894 11166.7533 11461.6339 02/29/2024 10263.3283 11049.0938 11299.6979 03/31/2024 10315.8727 11103.49 11404.0404 04/30/2024 10151.6684 10953.0281 11115.9877 05/31/2024 10286.031 11074.7431 11304.4398 06/30/2024 10372.0142 11168.445 11411.4668 07/31/2024 10570.1284 11372.7933 11678.0004 08/31/2024 10686.1262 11495.8302 11845.8158 09/30/2024 10804.7684 11609.4455 12004.424 Effective September 30, 2024, the Fund adopted the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Bloomberg U.S. Government Intermediate Total Return Index Value Unhedged as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Limited Term U.S. Government Fund Class R4 9.04% 0.29% 0.78% Bloomberg U.S. Aggregate Total Return Index Value USD 11.57% 0.33% 1.84% Bloomberg U.S. Government Intermediate Total Return Index Value Unhedged 8.33% 0.84% 1.50%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fgov/LTUGX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 139,700,000
Holdings Count | Holdings	157
Advisory Fees Paid, Amount	$ 600,000
Investment Company, Portfolio Turnover	32.26%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $139.7 Number of Holdings 157 Annual Portfolio Turnover 32.26% Total Advisory Fee $0.6
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Types of Holdings (%) U.S. Treasury Securities 20.0 U.S. Government Agencies 6.6 Mortgage Backed 62.5 Corporate Bonds 2.1 Cash Equivalents & Other 8.8 Types of Holdings (%) U.S. Treasury Securities 20.0% U.S. Government Agencies 6.6% Mortgage Backed 62.5% Corporate Bonds 2.1% Cash Equivalents & Other 8.8% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Limited Term U.S. Government Fund - Class R5
Shareholder Report [Line Items]
Class Name	CLASS: R5
Trading Symbol	LTGRX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Limited Term U.S. Government Fund Class R5 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R5 $70.00 0.67%
Expenses Paid, Amount	$ 70
Expense Ratio, Percent	0.67%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R5 shares outperformed the Bloomberg U.S. Government Intermediate Total Return Index Value Unhedged (the “Index”) during the 12-month period ended September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. The Fund’s long duration, compared to the Index, was a relative contributor in this environment. Positive relative returns from the Fund’s allocation to asset-backed securities, collateralized mortgage obligations, and commercial mortgage-backed securities also contributed. There were no meaningful detractors to the Fund’s performance over the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Limited Term U.S. Government Fund Bloomberg U.S. Government Intermediate Total Return Index Value Unhedged Bloomberg U.S. Aggregate Total Return Value Index USD 09/30/2014 10000.0066 10000 10000 10/31/2014 10051.0864 10070.1644 10098.2769 11/30/2014 10088.2773 10120.9308 10169.91 12/31/2014 10058.4344 10094.5925 10179.4256 01/31/2015 10152.3025 10255.4004 10392.8789 02/28/2015 10109.3044 10167.2664 10295.1602 03/31/2015 10144.2563 10220.968 10342.967 04/30/2015 10138.4267 10211.7143 10305.856 05/31/2015 10143.3799 10216.8621 10281.0356 06/30/2015 10122.7479 10177.0746 10168.9318 07/31/2015 10147.8703 10218.0552 10239.6187 08/31/2015 10149.7517 10223.7071 10224.9146 09/30/2015 10195.3145 10299.8931 10294.0811 10/31/2015 10167.8722 10267.1468 10295.7875 11/30/2015 10146.6494 10233.2913 10268.5908 12/31/2015 10118.2358 10213.8093 10235.4031 01/31/2016 10232.7365 10375.9447 10376.2558 02/29/2016 10259.1299 10427.2264 10449.8664 03/31/2016 10291.3374 10446.9605 10545.7404 04/30/2016 10291.6945 10443.9861 10586.2218 05/31/2016 10279.022 10429.0917 10588.9383 06/30/2016 10375.6854 10576.8705 10779.1979 07/31/2016 10370.409 10580.7748 10847.3436 08/31/2016 10356.365 10533.246 10834.9414 09/30/2016 10379.1965 10551.2324 10828.5941 10/31/2016 10359.8896 10500.7461 10745.7655 11/30/2016 10248.9648 10324.3045 10491.5864 12/31/2016 10242.162 10321.4869 10506.3861 01/31/2017 10261.6991 10342.0668 10527.0016 02/28/2017 10274.9419 10371.9788 10597.7522 03/31/2017 10276.9935 10377.1322 10592.197 04/30/2017 10308.7282 10431.506 10673.9358 05/31/2017 10346.1789 10472.509 10756.0945 06/30/2017 10314.3135 10445.1736 10745.2712 07/31/2017 10344.2782 10478.4858 10791.5097 08/31/2017 10389.389 10542.27 10888.3034 09/30/2017 10354.806 10481.1129 10836.4459 10/31/2017 10355.254 10467.9045 10842.724 11/30/2017 10334.3849 10436.0096 10828.8068 12/31/2017 10347.1536 10438.6871 10878.506 01/31/2018 10272.1669 10339.3165 10753.2186 02/28/2018 10244.4958 10308.9283 10651.2843 03/31/2018 10290.9601 10362.5739 10719.5896 04/30/2018 10253.6903 10303.7974 10639.8655 05/31/2018 10310.8864 10370.2928 10715.7993 06/30/2018 10305.9391 10369.1445 10702.6209 07/31/2018 10293.5035 10348.9063 10705.1619 08/31/2018 10334.5664 10410.3267 10774.0467 09/30/2018 10301.0843 10357.6278 10704.6676 10/31/2018 10284.351 10361.6441 10620.0741 11/30/2018 10341.9236 10432.5927 10683.4727 12/31/2018 10449.3384 10587.519 10879.7393 01/31/2019 10502.5635 10632.7567 10995.2773 02/28/2019 10507.1215 10625.3739 10988.9087 03/31/2019 10591.0406 10754.931 11199.9166 04/30/2019 10602.8457 10759.8771 11202.782 05/31/2019 10704.9659 10917.1224 11401.6482 06/30/2019 10749.7252 11007.0825 11544.8346 07/31/2019 10752.1059 10987.8862 11570.2238 08/31/2019 10852.2603 11185.5127 11870.0302 09/30/2019 10846.2439 11136.4716 11806.8123 10/31/2019 10865.0829 11168.5514 11842.3764 11/30/2019 10857.9565 11141.3729 11836.3427 12/31/2019 10851.1011 11138.0904 11828.0976 01/31/2020 10967.3833 11295.1397 12055.7234 02/29/2020 11067.18 11480.5774 12272.7065 03/31/2020 11060.034 11714.8825 12200.4833 04/30/2020 11144.4577 11747.2424 12417.3601 05/31/2020 11183.5753 11768.6793 12475.1769 06/30/2020 11237.5616 11778.8685 12553.758 07/31/2020 11284.5197 11816.4937 12741.2746 08/31/2020 11265.7418 11793.494 12638.4313 09/30/2020 11271.9698 11802.2379 12631.4992 10/31/2020 11234.4707 11758.6134 12575.0965 11/30/2020 11263.6887 11772.9365 12698.4914 12/31/2020 11283.8827 11776.6839 12715.9864 01/31/2021 11269.4753 11749.0013 12624.817 02/28/2021 11180.1382 11652.297 12442.5048 03/31/2021 11099.5907 11573.8479 12287.1394 04/30/2021 11146.4255 11616.9459 12384.2096 05/31/2021 11160.3407 11653.6973 12424.6696 06/30/2021 11149.5306 11645.1102 12511.9637 07/31/2021 11223.3763 11734.5102 12651.8595 08/31/2021 11203.7684 11715.5827 12627.7727 09/30/2021 11157.0617 11644.8189 12518.4439 10/31/2021 11116.9019 11578.486 12514.9938 11/30/2021 11120.122 11607.6138 12552.0197 12/31/2021 11100.24 11577.136 12519.9004 01/31/2022 10976.0256 11429.4021 12250.172 02/28/2022 10928.3358 11377.7898 12113.503 03/31/2022 10703.7007 11092.2646 11776.9683 04/30/2022 10505.3834 10915.9181 11330.0576 05/31/2022 10586.2738 10989.7403 11403.1101 06/30/2022 10489.7491 10908.8546 11224.2161 07/31/2022 10665.4117 11053.5022 11498.4738 08/31/2022 10447.9869 10833.0607 11173.5652 09/30/2022 10122.417 10575.795 10690.7981 10/31/2022 10066.2702 10527.7061 10552.327 11/30/2022 10275.5863 10707.7832 10940.3949 12/31/2022 10235.3221 10682.5596 10891.0465 01/31/2023 10450.4781 10852.6772 11226.0979 02/28/2023 10287.8888 10664.59 10935.8444 03/31/2023 10464.3654 10923.7434 11213.6426 04/30/2023 10498.7818 10982.2287 11281.6023 05/31/2023 10451.0601 10901.147 11158.7602 06/30/2023 10387.5288 10800.9641 11118.9646 07/31/2023 10401.4639 10812.7161 11111.2139 08/31/2023 10372.4941 10818.6537 11040.24 09/30/2023 10217.3033 10716.6503 10759.6881 10/31/2023 10146.0991 10680.952 10589.8898 11/30/2023 10413.0742 10914.5906 11069.4673 12/31/2023 10668.6713 11142.342 11493.195 01/31/2024 10698.7887 11166.7533 11461.6339 02/29/2024 10596.225 11049.0938 11299.6979 03/31/2024 10653.3232 11103.49 11404.0404 04/30/2024 10486.6859 10953.0281 11115.9877 05/31/2024 10628.2683 11074.7431 11304.4398 06/30/2024 10719.8688 11168.445 11411.4668 07/31/2024 10927.4369 11372.7933 11678.0004 08/31/2024 11050.2525 11495.8302 11845.8158 09/30/2024 11184.9234 11609.4455 12004.424 Effective September 30, 2024, the Fund adopted the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Bloomberg U.S. Government Intermediate Total Return Index Value Unhedged as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Limited Term U.S. Government Fund Class R5 9.47% 0.62% 1.13% Bloomberg U.S. Aggregate Total Return Index Value USD 11.57% 0.33% 1.84% Bloomberg U.S. Government Intermediate Total Return Index Value Unhedged 8.33% 0.84% 1.50%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fgov/LTGRX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 139,700,000
Holdings Count | Holdings	157
Advisory Fees Paid, Amount	$ 600,000
Investment Company, Portfolio Turnover	32.26%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $139.7 Number of Holdings 157 Annual Portfolio Turnover 32.26% Total Advisory Fee $0.6
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Types of Holdings (%) U.S. Treasury Securities 20.0 U.S. Government Agencies 6.6 Mortgage Backed 62.5 Corporate Bonds 2.1 Cash Equivalents & Other 8.8 Types of Holdings (%) U.S. Treasury Securities 20.0% U.S. Government Agencies 6.6% Mortgage Backed 62.5% Corporate Bonds 2.1% Cash Equivalents & Other 8.8% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Limited Term Income Fund - Class A
Shareholder Report [Line Items]
Class Name	CLASS: A
Trading Symbol	THIFX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Limited Term Income Fund Class A Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $80.00 0.76%
Expenses Paid, Amount	$ 80
Expense Ratio, Percent	0.76%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class A shares outperformed the Bloomberg Intermediate U.S. Government/Credit Total Return Index Value Unhedged (the “Index”) during the 12-month period ended September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. The Fund’s slight short duration versus the Index was a relative detractor in this environment. However, this was offset by positive relative returns from the Fund’s allocation to collateralized mortgage obligations, corporate bonds, and asset-backed securities
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Limited Term Income Fund Bloomberg Intermediate U.S. Government/Credit Total Return Index Value Unhedged Bloomberg U.S. Aggregate Total Return Value Index USD 09/30/2014 9846.7152 10000 10000 10/31/2014 9891.7695 10070.3226 10098.2769 11/30/2014 9916.0752 10121.0909 10169.91 12/31/2014 9866.5324 10089.052 10179.4256 01/31/2015 9957.4468 10256.6848 10392.8789 02/28/2015 9938.012 10185.2608 10295.1602 03/31/2015 9984.9473 10235.0557 10342.967 04/30/2015 9994.0096 10231.4031 10305.856 05/31/2015 10010.3501 10232.4021 10281.0356 06/30/2015 9960.3157 10171.3008 10168.9318 07/31/2015 9983.6877 10207.7402 10239.6187 08/31/2015 9955.3946 10199.1337 10224.9146 09/30/2015 9972.1778 10267.8682 10294.0811 10/31/2015 9979.9844 10257.2791 10295.7875 11/30/2015 9957.5705 10231.0957 10268.5908 12/31/2015 9912.9021 10196.936 10235.4031 01/31/2016 9972.9241 10321.7051 10376.2558 02/29/2016 10004.06 10371.956 10449.8664 03/31/2016 10089.3693 10446.3359 10545.7404 04/30/2016 10137.1137 10474.0715 10586.2218 05/31/2016 10154.5341 10462.0531 10588.9383 06/30/2016 10254.681 10611.9298 10779.1979 07/31/2016 10285.9214 10641.9861 10847.3436 08/31/2016 10293.6338 10614.6706 10834.9414 09/30/2016 10307.2924 10628.8508 10828.5941 10/31/2016 10306.1981 10584.9473 10745.7655 11/30/2016 10206.7808 10401.8279 10491.5864 12/31/2016 10222.2819 10409.1588 10506.3861 01/31/2017 10252.651 10437.2888 10527.0016 02/28/2017 10291.1121 10485.7672 10597.7522 03/31/2017 10299.1212 10490.5008 10592.197 04/30/2017 10346.0148 10555.767 10673.9358 05/31/2017 10392.3718 10608.4411 10756.0945 06/30/2017 10385.2578 10589.3632 10745.2712 07/31/2017 10424.447 10638.3641 10791.5097 08/31/2017 10464.2739 10701.3353 10888.3034 09/30/2017 10442.0736 10653.0567 10836.4459 10/31/2017 10450.9843 10652.1807 10842.724 11/30/2017 10445.1928 10619.4605 10828.8068 12/31/2017 10454.1622 10631.6377 10878.506 01/31/2018 10416.7595 10538.0724 10753.2186 02/28/2018 10387.8575 10489.6299 10651.2843 03/31/2018 10399.2095 10527.3501 10719.5896 04/30/2018 10379.5824 10472.3605 10639.8655 05/31/2018 10423.229 10534.932 10715.7993 06/30/2018 10420.7532 10528.0058 10702.6209 07/31/2018 10425.894 10530.7671 10705.1619 08/31/2018 10478.2645 10593.0723 10774.0467 09/30/2018 10451.1982 10550.4955 10704.6676 10/31/2018 10432.8593 10536.0027 10620.0741 11/30/2018 10462.8195 10583.559 10683.4727 12/31/2018 10557.1282 10724.993 10879.7393 01/31/2019 10627.1999 10818.0666 10995.2773 02/28/2019 10657.3062 10827.3493 10988.9087 03/31/2019 10768.5192 10973.8756 11199.9166 04/30/2019 10799.3682 10994.9821 11202.782 05/31/2019 10886.475 11138.4756 11401.6482 06/30/2019 10957.8408 11257.799 11544.8346 07/31/2019 10972.6135 11253.962 11570.2238 08/31/2019 11091.8672 11453.5004 11870.0302 09/30/2019 11081.6295 11411.9738 11806.8123 10/31/2019 11118.727 11457.2248 11842.3764 11/30/2019 11110.9185 11440.1193 11836.3427 12/31/2019 11123.6651 11454.4942 11828.0976 01/31/2020 11250.1064 11617.0809 12055.7234 02/29/2020 11351.0225 11781.061 12272.7065 03/31/2020 11048.8104 11729.4064 12200.4833 04/30/2020 11327.1334 11894.5341 12417.3601 05/31/2020 11495.9321 11984.9847 12475.1769 06/30/2020 11680.0199 12058.8984 12553.758 07/31/2020 11814.5518 12148.934 12741.2746 08/31/2020 11824.0513 12134.5437 12638.4313 09/30/2020 11833.2004 12133.0427 12631.4992 10/31/2020 11823.9119 12106.4393 12575.0965 11/30/2020 11895.7929 12166.4545 12698.4914 12/31/2020 11943.5116 12191.48 12715.9864 01/31/2021 11930.992 12157.6584 12624.817 02/28/2021 11859.7286 12058.3042 12442.5048 03/31/2021 11762.346 11964.6876 12287.1394 04/30/2021 11826.9305 12023.96 12384.2096 05/31/2021 11857.3104 12072.2334 12424.6696 06/30/2021 11861.8592 12082.0592 12511.9637 07/31/2021 11925.264 12174.5385 12651.8595 08/31/2021 11911.8695 12154.7844 12627.7727 09/30/2021 11872.1837 12084.8973 12518.4439 10/31/2021 11832.4646 12017.4282 12514.9938 11/30/2021 11819.093 12031.3473 12552.0197 12/31/2021 11815.4719 12015.8862 12519.9004 01/31/2022 11690.1709 11839.6059 12250.172 02/28/2022 11556.427 11761.9166 12113.503 03/31/2022 11355.6537 11474.0792 11776.9683 04/30/2022 11164.6533 11244.7048 11330.0576 05/31/2022 11200.7227 11328.4034 11403.1101 06/30/2022 11054.4774 11202.4406 11224.2161 07/31/2022 11189.5246 11385.3397 11498.4738 08/31/2022 11085.4586 11157.6558 11173.5652 09/30/2022 10817.0002 10859.3626 10690.7981 10/31/2022 10732.6369 10811.5758 10552.327 11/30/2022 10948.729 11046.3498 10940.3949 12/31/2022 10949.0778 11026.4011 10891.0465 01/31/2023 11207.5793 11232.1434 11226.0979 02/28/2023 11077.8348 11030.3918 10935.8444 03/31/2023 11223.664 11283.5469 11213.6426 04/30/2023 11290.183 11352.4197 11281.6023 05/31/2023 11231.9767 11268.3779 11158.7602 06/30/2023 11209.6995 11191.7746 11118.9646 07/31/2023 11257.2256 11221.0881 11111.2139 08/31/2023 11261.4539 11219.4692 11040.24 09/30/2023 11148.2618 11098.5986 10759.6881 10/31/2023 11083.6456 11047.2002 10589.8898 11/30/2023 11360.2349 11341.6308 11069.4673 12/31/2023 11635.8807 11604.5809 11493.195 01/31/2024 11701.3912 11628.8278 11461.6339 02/29/2024 11650.8244 11513.2748 11299.6979 03/31/2024 11724.2116 11587.1629 11404.0404 04/30/2024 11617.2793 11430.8211 11115.9877 05/31/2024 11750.6423 11568.7101 11304.4398 06/30/2024 11836.864 11660.9742 11411.4668 07/31/2024 12033.8513 11880.1489 11678.0004 08/31/2024 12146.8748 12016.8903 11845.8158 09/30/2024 12271.6168 12147.2281 12004.424 Effective September 30, 2024, the Fund adopted the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Bloomberg U.S. Government/Credit Intermediate Total Return Index Value Unhedged as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Limited Term Income Fund Class A (with sales charge) 7.56% 1.75% 2.07% Limited Term Income Fund Class A (without sales charge) 10.08% 2.06% 2.23% Bloomberg Intermediate U.S. Government/Credit Total Return Index Value Unhedged 9.45% 1.26% 1.96% Bloomberg U.S. Aggregate Total Return Value Index USD 11.57% 0.33% 1.84%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment and assumes the deduction of the maximum sales charge associated with that investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fli/THIFX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 6,430,200,000
Holdings Count | Holdings	652
Advisory Fees Paid, Amount	$ 20,800,000
Investment Company, Portfolio Turnover	59.42%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $6,430.2 Number of Holdings 652 Annual Portfolio Turnover 59.42% Total Advisory Fee $20.8
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) U.S. Government 30.1 AAA 19.9 AA 4.6 A 17.0 BBB 20.1 NR 0.3 Below Invest. Grade 0.1 Cash Equivalents & Other 7.7 Credit Quality Ratings (%) U.S. Government 30.1% AAA 19.9% AA 4.6% A 17.0% BBB 20.1% NR 0.3% Below Invest. Grade 0.1% Cash Equivalents & Other 7.7% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Limited Term Income Fund - Class C
Shareholder Report [Line Items]
Class Name	CLASS: C
Trading Symbol	THICX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Limited Term Income Fund Class C Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $106.00 1.01%
Expenses Paid, Amount	$ 106
Expense Ratio, Percent	1.01%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class C shares outperformed the Bloomberg Intermediate U.S. Government/Credit Total Return Index Value Unhedged (the “Index”) during the 12-month period ended September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. The Fund’s slight short duration versus the Index was a relative detractor in this environment. However, this was offset by positive relative returns from the Fund’s allocation to collateralized mortgage obligations, corporate bonds, and asset-backed securities
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Limited Term Income Fund Bloomberg Intermediate U.S. Government/Credit Total Return Index Value Unhedged Bloomberg U.S. Aggregate Total Return Value Index USD 09/30/2014 9999.9933 10000 10000 10/31/2014 10043.8744 10070.3226 10098.2769 11/30/2014 10066.8408 10121.0909 10169.91 12/31/2014 10014.4556 10089.052 10179.4256 01/31/2015 10104.9066 10256.6848 10392.8789 02/28/2015 10083.4483 10185.2608 10295.1602 03/31/2015 10129.1816 10235.0557 10342.967 04/30/2015 10136.5152 10231.4031 10305.856 05/31/2015 10150.9901 10232.4021 10281.0356 06/30/2015 10098.1536 10171.3008 10168.9318 07/31/2015 10112.2779 10207.7402 10239.6187 08/31/2015 10089.1938 10199.1337 10224.9146 09/30/2015 10104.4888 10267.8682 10294.0811 10/31/2015 10110.3941 10257.2791 10295.7875 11/30/2015 10085.7421 10231.0957 10268.5908 12/31/2015 10030.82 10196.936 10235.4031 01/31/2016 10097.3831 10321.7051 10376.2558 02/29/2016 10127.1039 10371.956 10449.8664 03/31/2016 10211.5531 10446.3359 10545.7404 04/30/2016 10257.9453 10474.0715 10586.2218 05/31/2016 10273.5347 10462.0531 10588.9383 06/30/2016 10373.17 10611.9298 10779.1979 07/31/2016 10402.884 10641.9861 10847.3436 08/31/2016 10408.8975 10614.6706 10834.9414 09/30/2016 10421.1734 10628.8508 10828.5941 10/31/2016 10418.3176 10584.9473 10745.7655 11/30/2016 10315.9004 10401.8279 10491.5864 12/31/2016 10321.9582 10409.1588 10506.3861 01/31/2017 10358.5233 10437.2888 10527.0016 02/28/2017 10395.6964 10485.7672 10597.7522 03/31/2017 10402.0426 10490.5008 10592.197 04/30/2017 10447.779 10555.767 10673.9358 05/31/2017 10492.8096 10608.4411 10756.0945 06/30/2017 10483.8307 10589.3632 10745.2712 07/31/2017 10513.7829 10638.3641 10791.5097 08/31/2017 10559.8873 10701.3353 10888.3034 09/30/2017 10535.7602 10653.0567 10836.4459 10/31/2017 10542.9152 10652.1807 10842.724 11/30/2017 10535.2381 10619.4605 10828.8068 12/31/2017 10542.3653 10631.6377 10878.506 01/31/2018 10494.794 10538.0724 10753.2186 02/28/2018 10463.8848 10489.6299 10651.2843 03/31/2018 10481.3749 10527.3501 10719.5896 04/30/2018 10459.7666 10472.3605 10639.8655 05/31/2018 10501.9236 10534.932 10715.7993 06/30/2018 10497.5537 10528.0058 10702.6209 07/31/2018 10500.772 10530.7671 10705.1619 08/31/2018 10551.552 10593.0723 10774.0467 09/30/2018 10522.3149 10550.4955 10704.6676 10/31/2018 10501.9368 10536.0027 10620.0741 11/30/2018 10530.3433 10583.559 10683.4727 12/31/2018 10623.5426 10724.993 10879.7393 01/31/2019 10692.2995 10818.0666 10995.2773 02/28/2019 10720.9354 10827.3493 10988.9087 03/31/2019 10831.0637 10973.8756 11199.9166 04/30/2019 10860.4925 10994.9821 11202.782 05/31/2019 10946.52 11138.4756 11401.6482 06/30/2019 11016.7044 11257.799 11544.8346 07/31/2019 11029.2533 11253.962 11570.2238 08/31/2019 11146.9411 11453.5004 11870.0302 09/30/2019 11134.3414 11411.9738 11806.8123 10/31/2019 11160.976 11457.2248 11842.3764 11/30/2019 11158.9732 11440.1193 11836.3427 12/31/2019 11169.3375 11454.4942 11828.0976 01/31/2020 11294.2968 11617.0809 12055.7234 02/29/2020 11393.7009 11781.061 12272.7065 03/31/2020 11079.3921 11729.4064 12200.4833 04/30/2020 11365.3588 11894.5341 12417.3601 05/31/2020 11532.7842 11984.9847 12475.1769 06/30/2020 11715.578 12058.8984 12553.758 07/31/2020 11848.6554 12148.934 12741.2746 08/31/2020 11856.0732 12134.5437 12638.4313 09/30/2020 11863.2004 12133.0427 12631.4992 10/31/2020 11851.3949 12106.4393 12575.0965 11/30/2020 11921.0889 12166.4545 12698.4914 12/31/2020 11966.4536 12191.48 12715.9864 01/31/2021 11951.324 12157.6584 12624.817 02/28/2021 11877.4944 12058.3042 12442.5048 03/31/2021 11777.2469 11964.6876 12287.1394 04/30/2021 11839.8768 12023.96 12384.2096 05/31/2021 11868.1343 12072.2334 12424.6696 06/30/2021 11870.568 12082.0592 12511.9637 07/31/2021 11932.3855 12174.5385 12651.8595 08/31/2021 11917.2566 12154.7844 12627.7727 09/30/2021 11875.7852 12084.8973 12518.4439 10/31/2021 11833.47 12017.4282 12514.9938 11/30/2021 11817.6397 12031.3473 12552.0197 12/31/2021 11811.4687 12015.8862 12519.9004 01/31/2022 11683.8014 11839.6059 12250.172 02/28/2022 11547.9765 11761.9166 12113.503 03/31/2022 11344.8902 11474.0792 11776.9683 04/30/2022 11151.8904 11244.7048 11330.0576 05/31/2022 11186.0286 11328.4034 11403.1101 06/30/2022 11037.8724 11202.4406 11224.2161 07/31/2022 11170.8514 11385.3397 11498.4738 08/31/2022 11064.6902 11157.6558 11173.5652 09/30/2022 10794.3217 10859.3626 10690.7981 10/31/2022 10707.9437 10811.5758 10552.327 11/30/2022 10921.8628 11046.3498 10940.3949 12/31/2022 10920.0906 11026.4011 10891.0465 01/31/2023 11176.2413 11232.1434 11226.0979 02/28/2023 11044.7565 11030.3918 10935.8444 03/31/2023 11188.237 11283.5469 11213.6426 04/30/2023 11252.3778 11352.4197 11281.6023 05/31/2023 11191.9122 11268.3779 11158.7602 06/30/2023 11167.3841 11191.7746 11118.9646 07/31/2023 11212.5758 11221.0881 11111.2139 08/31/2023 11214.5505 11219.4692 11040.24 09/30/2023 11099.4773 11098.5986 10759.6881 10/31/2023 11032.6024 11047.2002 10589.8898 11/30/2023 11305.9694 11341.6308 11069.4673 12/31/2023 11578.2016 11604.5809 11493.195 01/31/2024 11640.988 11628.8278 11461.6339 02/29/2024 11588.2455 11513.2748 11299.6979 03/31/2024 11658.7884 11587.1629 11404.0404 04/30/2024 11549.8445 11430.8211 11115.9877 05/31/2024 11680.0932 11568.7101 11304.4398 06/30/2024 11763.4277 11660.9742 11411.4668 07/31/2024 11957.2142 11880.1489 11678.0004 08/31/2024 12067.3697 12016.8903 11845.8158 09/30/2024 12189.2278 12147.2281 12004.424 Effective September 30, 2024, the Fund adopted the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Bloomberg U.S. Government/Credit Intermediate Total Return Index Value Unhedged as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Limited Term Income Fund Class C (with sales charge) 9.32% 1.83% 2.00% Limited Term Income Fund Class C (without sales charge) 9.82% 1.83% 2.00% Bloomberg Intermediate U.S. Government/Credit Total Return Index Value Unhedged 9.45% 1.26% 1.96% Bloomberg U.S. Aggregate Total Return Value Index USD 11.57% 0.33% 1.84%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fli/THICX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 6,430,200,000
Holdings Count | Holdings	652
Advisory Fees Paid, Amount	$ 20,800,000
Investment Company, Portfolio Turnover	59.42%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $6,430.2 Number of Holdings 652 Annual Portfolio Turnover 59.42% Total Advisory Fee $20.8
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) U.S. Government 30.1 AAA 19.9 AA 4.6 A 17.0 BBB 20.1 NR 0.3 Below Invest. Grade 0.1 Cash Equivalents & Other 7.7 Credit Quality Ratings (%) U.S. Government 30.1% AAA 19.9% AA 4.6% A 17.0% BBB 20.1% NR 0.3% Below Invest. Grade 0.1% Cash Equivalents & Other 7.7% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Limited Term Income Fund - Class C2
Shareholder Report [Line Items]
Class Name	CLASS: C2
Trading Symbol	THIQX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Limited Term Income Fund Class C2 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C2 $130.00 1.24%
Expenses Paid, Amount	$ 130
Expense Ratio, Percent	1.24%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class C2 shares outperformed the Bloomberg Intermediate U.S. Government/Credit Total Return Index Value Unhedged (the “Index”) during the 12-month period ended September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. The Fund’s slight short duration versus the Index was a relative detractor in this environment. However, this was offset by positive relative returns from the Fund’s allocation to collateralized mortgage obligations, corporate bonds, and asset-backed securities
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Limited Term Income Fund Bloomberg Intermediate U.S. Government/Credit Total Return Index Value Unhedged Bloomberg U.S. Aggregate Total Return Value Index USD 09/30/2020 9999.9958 10000 10000 10/31/2020 9987.147 9978.0736 9955.3475 11/30/2020 10042.9733 10027.5379 10053.0358 12/31/2020 10078.8574 10048.1638 10066.8861 01/31/2021 10063.928 10020.2882 9994.7099 02/28/2021 9999.8407 9938.4008 9850.3785 03/31/2021 9913.4636 9861.2425 9727.3801 04/30/2021 9964.0033 9910.0945 9804.2278 05/31/2021 9985.5453 9949.8813 9836.2589 06/30/2021 9985.477 9957.9796 9905.3671 07/31/2021 10035.2162 10034.2007 10016.1187 08/31/2021 10020.2428 10017.9195 9997.0498 09/30/2021 9983.2904 9960.3188 9910.4973 10/31/2021 9945.8975 9904.7111 9907.766 11/30/2021 9930.8516 9916.1831 9937.0783 12/31/2021 9923.5676 9903.4402 9911.6504 01/31/2022 9813.7243 9758.1507 9698.114 02/28/2022 9697.6487 9694.1195 9589.917 03/31/2022 9524.359 9456.8852 9323.4921 04/30/2022 9360.6173 9267.8359 8969.6856 05/31/2022 9387.6396 9336.8198 9027.5191 06/30/2022 9261.7516 9233.0019 8885.8938 07/31/2022 9371.2355 9383.7465 9103.0159 08/31/2022 9280.1082 9196.0905 8845.795 09/30/2022 9051.4258 8950.2385 8463.6019 10/31/2022 8976.5345 8910.8528 8353.9783 11/30/2022 9154.6486 9104.3525 8661.2006 12/31/2022 9151.2519 9087.9109 8622.1329 01/31/2023 9364.1164 9257.4828 8887.3836 02/28/2023 9252.365 9091.2 8657.5981 03/31/2023 9370.894 9299.8493 8877.5231 04/30/2023 9422.8031 9356.614 8931.3249 05/31/2023 9370.3176 9287.3471 8834.0742 06/30/2023 9348.0182 9224.211 8802.5692 07/31/2023 9383.9277 9248.371 8796.4332 08/31/2023 9383.6794 9247.0368 8740.2452 09/30/2023 9285.5405 9147.4158 8518.1402 10/31/2023 9227.7587 9105.0534 8383.7157 11/30/2023 9454.6243 9347.7218 8763.3836 12/31/2023 9680.4608 9564.4442 9098.8368 01/31/2024 9731.2049 9584.4283 9073.8508 02/29/2024 9685.4993 9489.1901 8945.6507 03/31/2024 9742.7569 9550.0883 9028.2556 04/30/2024 9649.9768 9421.2321 8800.2124 05/31/2024 9756.9976 9534.8796 8949.4047 06/30/2024 9824.8678 9610.9233 9034.1349 07/31/2024 9984.6054 9791.566 9245.142 08/31/2024 10074.4572 9904.2677 9377.9967 09/30/2024 10174.0877 10011.6916 9503.5623 Effective September 30, 2024, the Fund adopted the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Bloomberg U.S. Government/Credit Intermediate Total Return Index Value Unhedged as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year Limited Term Income Fund Class C2 (with sales charge) 8.92% Limited Term Income Fund Class C2 (without sales charge) 9.57% Bloomberg Intermediate U.S. Government/Credit Total Return Index Value Unhedged 9.45% Bloomberg U.S. Aggregate Total Return Value Index USD 11.57%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 6,430,200,000
Holdings Count | Holdings	652
Advisory Fees Paid, Amount	$ 20,800,000
Investment Company, Portfolio Turnover	59.42%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $6,430.2 Number of Holdings 652 Annual Portfolio Turnover 59.42% Total Advisory Fee $20.8
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) U.S. Government 30.1 AAA 19.9 AA 4.6 A 17.0 BBB 20.1 NR 0.3 Below Invest. Grade 0.1 Cash Equivalents & Other 7.7 Credit Quality Ratings (%) U.S. Government 30.1% AAA 19.9% AA 4.6% A 17.0% BBB 20.1% NR 0.3% Below Invest. Grade 0.1% Cash Equivalents & Other 7.7% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Limited Term Income Fund - Class I
Shareholder Report [Line Items]
Class Name	CLASS: I
Trading Symbol	THIIX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Limited Term Income Fund Class I Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $52.00 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? The Fund’s Class I shares outperformed the Bloomberg Intermediate U.S. Government/Credit Total Return Index Value Unhedged (the “Index”) during the 12-month period ended September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. The Fund’s slight short duration versus the Index was a relative detractor in this environment. However, this was offset by positive relative returns from the Fund’s allocation to collateralized mortgage obligations, corporate bonds, and asset-backed securities
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Limited Term Income Fund Bloomberg Intermediate U.S. Government/Credit Total Return Index Value Unhedged Bloomberg U.S. Aggregate Total Return Value Index USD 09/30/2014 10000.0021 10000 10000 10/31/2014 10048.8798 10070.3226 10098.2769 11/30/2014 10076.6376 10121.0909 10169.91 12/31/2014 10029.3536 10089.052 10179.4256 01/31/2015 10124.7336 10256.6848 10392.8789 02/28/2015 10107.7538 10185.2608 10295.1602 03/31/2015 10158.5352 10235.0557 10342.967 04/30/2015 10178.1341 10231.4031 10305.856 05/31/2015 10190.0949 10232.4021 10281.0356 06/30/2015 10149.4793 10171.3008 10168.9318 07/31/2015 10168.6796 10207.7402 10239.6187 08/31/2015 10143.0202 10199.1337 10224.9146 09/30/2015 10170.7633 10267.8682 10294.0811 10/31/2015 10174.0309 10257.2791 10295.7875 11/30/2015 10154.1898 10231.0957 10268.5908 12/31/2015 10111.7487 10196.936 10235.4031 01/31/2016 10183.6585 10321.7051 10376.2558 02/29/2016 10210.6111 10371.956 10449.8664 03/31/2016 10300.6998 10446.3359 10545.7404 04/30/2016 10352.3312 10474.0715 10586.2218 05/31/2016 10373.1928 10462.0531 10588.9383 06/30/2016 10478.5515 10611.9298 10779.1979 07/31/2016 10513.6117 10641.9861 10847.3436 08/31/2016 10532.5802 10614.6706 10834.9414 09/30/2016 10549.8588 10628.8508 10828.5941 10/31/2016 10544.3371 10584.9473 10745.7655 11/30/2016 10453.6641 10401.8279 10491.5864 12/31/2016 10464.9765 10409.1588 10506.3861 01/31/2017 10499.3434 10437.2888 10527.0016 02/28/2017 10541.5989 10485.7672 10597.7522 03/31/2017 10553.2208 10490.5008 10592.197 04/30/2017 10604.5914 10555.767 10673.9358 05/31/2017 10655.4879 10608.4411 10756.0945 06/30/2017 10651.4673 10589.3632 10745.2712 07/31/2017 10695.0468 10638.3641 10791.5097 08/31/2017 10739.1327 10701.3353 10888.3034 09/30/2017 10719.5558 10653.0567 10836.4459 10/31/2017 10740.1325 10652.1807 10842.724 11/30/2017 10729.5542 10619.4605 10828.8068 12/31/2017 10750.217 10631.6377 10878.506 01/31/2018 10707.2554 10538.0724 10753.2186 02/28/2018 10680.0814 10489.6299 10651.2843 03/31/2018 10702.5968 10527.3501 10719.5896 04/30/2018 10677.084 10472.3605 10639.8655 05/31/2018 10724.7407 10534.932 10715.7993 06/30/2018 10724.8152 10528.0058 10702.6209 07/31/2018 10732.8167 10530.7671 10705.1619 08/31/2018 10789.2254 10593.0723 10774.0467 09/30/2018 10763.7746 10550.4955 10704.6676 10/31/2018 10755.7498 10536.0027 10620.0741 11/30/2018 10781.0845 10583.559 10683.4727 12/31/2018 10881.0638 10724.993 10879.7393 01/31/2019 10964.3133 10818.0666 10995.2773 02/28/2019 10998.2591 10827.3493 10988.9087 03/31/2019 11107.9021 10973.8756 11199.9166 04/30/2019 11143.2122 10994.9821 11202.782 05/31/2019 11236.7123 11138.4756 11401.6482 06/30/2019 11313.8886 11257.799 11544.8346 07/31/2019 11331.3074 11253.962 11570.2238 08/31/2019 11456.6225 11453.5004 11870.0302 09/30/2019 11456.5175 11411.9738 11806.8123 10/31/2019 11488.8497 11457.2248 11842.3764 11/30/2019 11491.6195 11440.1193 11836.3427 12/31/2019 11507.2785 11454.4942 11828.0976 01/31/2020 11640.6061 11617.0809 12055.7234 02/29/2020 11738.8732 11781.061 12272.7065 03/31/2020 11428.9421 11729.4064 12200.4833 04/30/2020 11728.6397 11894.5341 12417.3601 05/31/2020 11906.6204 11984.9847 12475.1769 06/30/2020 12100.3559 12058.8984 12553.758 07/31/2020 12242.4407 12148.934 12741.2746 08/31/2020 12246.3722 12134.5437 12638.4313 09/30/2020 12267.1585 12133.0427 12631.4992 10/31/2020 12251.6707 12106.4393 12575.0965 11/30/2020 12337.5579 12166.4545 12698.4914 12/31/2020 12381.0426 12191.48 12715.9864 01/31/2021 12370.8274 12157.6584 12624.817 02/28/2021 12299.4336 12058.3042 12442.5048 03/31/2021 12209.7018 11964.6876 12287.1394 04/30/2021 12270.5045 12023.96 12384.2096 05/31/2021 12313.6559 12072.2334 12424.6696 06/30/2021 12321.0816 12082.0592 12511.9637 07/31/2021 12390.1917 12174.5385 12651.8595 08/31/2021 12379.6319 12154.7844 12627.7727 09/30/2021 12332.8195 12084.8973 12518.4439 10/31/2021 12303.2525 12017.4282 12514.9938 11/30/2021 12292.06 12031.3473 12552.0197 12/31/2021 12282.1577 12015.8862 12519.9004 01/31/2022 12163.4017 11839.6059 12250.172 02/28/2022 12026.6608 11761.9166 12113.503 03/31/2022 11820.0222 11474.0792 11776.9683 04/30/2022 11624.5384 11244.7048 11330.0576 05/31/2022 11665.4072 11328.4034 11403.1101 06/30/2022 11507.4617 11202.4406 11224.2161 07/31/2022 11650.6456 11385.3397 11498.4738 08/31/2022 11544.9251 11157.6558 11173.5652 09/30/2022 11267.9417 10859.3626 10690.7981 10/31/2022 11191.8351 10811.5758 10552.327 11/30/2022 11410.5014 11046.3498 10940.3949 12/31/2022 11422.7798 11026.4011 10891.0465 01/31/2023 11686.093 11232.1434 11226.0979 02/28/2023 11553.5676 11030.3918 10935.8444 03/31/2023 11717.9841 11283.5469 11213.6426 04/30/2023 11790.0168 11352.4197 11281.6023 05/31/2023 11722.7559 11268.3779 11158.7602 06/30/2023 11702.1646 11191.7746 11118.9646 07/31/2023 11754.5381 11221.0881 11111.2139 08/31/2023 11761.7471 11219.4692 11040.24 09/30/2023 11646.2407 11098.5986 10759.6881 10/31/2023 11581.354 11047.2002 10589.8898 11/30/2023 11882.3629 11341.6308 11069.4673 12/31/2023 12163.7057 11604.5809 11493.195 01/31/2024 12235.1197 11628.8278 11461.6339 02/29/2024 12185.0318 11513.2748 11299.6979 03/31/2024 12274.3167 11587.1629 11404.0404 04/30/2024 12155.6633 11430.8211 11115.9877 05/31/2024 12298.1018 11568.7101 11304.4398 06/30/2024 12400.823 11660.9742 11411.4668 07/31/2024 12609.9013 11880.1489 11678.0004 08/31/2024 12731.1361 12016.8903 11845.8158 09/30/2024 12854.8357 12147.2281 12004.424 Effective September 30, 2024, the Fund adopted the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Bloomberg U.S. Government/Credit Intermediate Total Return Index Value Unhedged as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Limited Term Income Fund Class I 10.38% 2.33% 2.54% Bloomberg Intermediate U.S. Government/Credit Total Return Index Value Unhedged 9.45% 1.26% 1.96% Bloomberg U.S. Aggregate Total Return Value Index USD 11.57% 0.33% 1.84%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fli/THIIX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 6,430,200,000
Holdings Count | Holdings	652
Advisory Fees Paid, Amount	$ 20,800,000
Investment Company, Portfolio Turnover	59.42%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $6,430.2 Number of Holdings 652 Annual Portfolio Turnover 59.42% Total Advisory Fee $20.8
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) U.S. Government 30.1 AAA 19.9 AA 4.6 A 17.0 BBB 20.1 NR 0.3 Below Invest. Grade 0.1 Cash Equivalents & Other 7.7 Credit Quality Ratings (%) U.S. Government 30.1% AAA 19.9% AA 4.6% A 17.0% BBB 20.1% NR 0.3% Below Invest. Grade 0.1% Cash Equivalents & Other 7.7% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Limited Term Income Fund - Class R3
Shareholder Report [Line Items]
Class Name	CLASS: R3
Trading Symbol	THIRX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Limited Term Income Fund Class R3 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R3 $104.00 0.99%
Expenses Paid, Amount	$ 104
Expense Ratio, Percent	0.99%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R3 shares outperformed the Bloomberg Intermediate U.S. Government/Credit Total Return Index Value Unhedged (the “Index”) during the 12-month period ended September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. The Fund’s slight short duration versus the Index was a relative detractor in this environment. However, this was offset by positive relative returns from the Fund’s allocation to collateralized mortgage obligations, corporate bonds, and asset-backed securities
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Limited Term Income Fund Bloomberg Intermediate U.S. Government/Credit Total Return Index Value Unhedged Bloomberg U.S. Aggregate Total Return Value Index USD 09/30/2014 10000.0035 10000 10000 10/31/2014 10044.7438 10070.3226 10098.2769 11/30/2014 10068.5894 10121.0909 10169.91 12/31/2014 10017.2732 10089.052 10179.4256 01/31/2015 10108.3133 10256.6848 10392.8789 02/28/2015 10087.6608 10185.2608 10295.1602 03/31/2015 10134.1966 10235.0557 10342.967 04/30/2015 10142.3039 10231.4031 10305.856 05/31/2015 10157.6731 10232.4021 10281.0356 06/30/2015 10105.8471 10171.3008 10168.9318 07/31/2015 10128.5977 10207.7402 10239.6187 08/31/2015 10099.1946 10199.1337 10224.9146 09/30/2015 10115.5638 10267.8682 10294.0811 10/31/2015 10122.3608 10257.2791 10295.7875 11/30/2015 10098.5762 10231.0957 10268.5908 12/31/2015 10052.2573 10196.936 10235.4031 01/31/2016 10111.9893 10321.7051 10376.2558 02/29/2016 10142.4601 10371.956 10449.8664 03/31/2016 10227.7213 10446.3359 10545.7404 04/30/2016 10274.852 10474.0715 10586.2218 05/31/2016 10291.2536 10462.0531 10588.9383 06/30/2016 10392.4324 10611.9298 10779.1979 07/31/2016 10422.9031 10641.9861 10847.3436 08/31/2016 10429.7471 10614.6706 10834.9414 09/30/2016 10442.7398 10628.8508 10828.5941 10/31/2016 10440.684 10584.9473 10745.7655 11/30/2016 10339.0143 10401.8279 10491.5864 12/31/2016 10353.5792 10409.1588 10506.3861 01/31/2017 10383.1955 10437.2888 10527.0016 02/28/2017 10421.0996 10485.7672 10597.7522 03/31/2017 10428.2257 10490.5008 10592.197 04/30/2017 10474.6882 10555.767 10673.9358 05/31/2017 10520.4606 10608.4411 10756.0945 06/30/2017 10512.2573 10589.3632 10745.2712 07/31/2017 10550.9028 10638.3641 10791.5097 08/31/2017 10590.0885 10701.3353 10888.3034 09/30/2017 10566.9656 10653.0567 10836.4459 10/31/2017 10574.928 10652.1807 10842.724 11/30/2017 10568.0455 10619.4605 10828.8068 12/31/2017 10575.9902 10631.6377 10878.506 01/31/2018 10537.0851 10538.0724 10753.2186 02/28/2018 10498.6315 10489.6299 10651.2843 03/31/2018 10516.5988 10527.3501 10719.5896 04/30/2018 10495.3714 10472.3605 10639.8655 05/31/2018 10538.0205 10534.932 10715.7993 06/30/2018 10533.9843 10528.0058 10702.6209 07/31/2018 10537.6625 10530.7671 10705.1619 08/31/2018 10588.9348 10593.0723 10774.0467 09/30/2018 10560.325 10550.4955 10704.6676 10/31/2018 10540.4768 10536.0027 10620.0741 11/30/2018 10569.3611 10583.559 10683.4727 12/31/2018 10663.1727 10724.993 10879.7393 01/31/2019 10732.3781 10818.0666 10995.2773 02/28/2019 10761.4579 10827.3493 10988.9087 03/31/2019 10872.2776 10973.8756 11199.9166 04/30/2019 10902.3568 10994.9821 11202.782 05/31/2019 10989.1294 11138.4756 11401.6482 06/30/2019 11060.0384 11257.799 11544.8346 07/31/2019 11072.3621 11253.962 11570.2238 08/31/2019 11189.9988 11453.5004 11870.0302 09/30/2019 11177.1168 11411.9738 11806.8123 10/31/2019 11212.1346 11457.2248 11842.3764 11/30/2019 11202.0462 11440.1193 11836.3427 12/31/2019 11212.587 11454.4942 11828.0976 01/31/2020 11337.7475 11617.0809 12055.7234 02/29/2020 11437.2959 11781.061 12272.7065 03/31/2020 11130.9627 11729.4064 12200.4833 04/30/2020 11409.6801 11894.5341 12417.3601 05/31/2020 11577.7983 11984.9847 12475.1769 06/30/2020 11761.3771 12058.8984 12553.758 07/31/2020 11894.4964 12148.934 12741.2746 08/31/2020 11901.6782 12134.5437 12638.4313 09/30/2020 11908.6117 12133.0427 12631.4992 10/31/2020 11896.8484 12106.4393 12575.0965 11/30/2020 11966.7149 12166.4545 12698.4914 12/31/2020 12012.1751 12191.48 12715.9864 01/31/2021 11997.1372 12157.6584 12624.817 02/28/2021 11923.2721 12058.3042 12442.5048 03/31/2021 11823.0672 11964.6876 12287.1394 04/30/2021 11885.7123 12023.96 12384.2096 05/31/2021 11913.9119 12072.2334 12424.6696 06/30/2021 11916.2995 12082.0592 12511.9637 07/31/2021 11978.0588 12174.5385 12651.8595 08/31/2021 11962.7709 12154.7844 12627.7727 09/30/2021 11921.2362 12084.8973 12518.4439 10/31/2021 11878.6769 12017.4282 12514.9938 11/30/2021 11862.6613 12031.3473 12552.0197 12/31/2021 11856.4179 12015.8862 12519.9004 01/31/2022 11728.4153 11839.6059 12250.172 02/28/2022 11592.2864 11761.9166 12113.503 03/31/2022 11388.9651 11474.0792 11776.9683 04/30/2022 11196.0039 11244.7048 11330.0576 05/31/2022 11230.636 11328.4034 11403.1101 06/30/2022 11074.0307 11202.4406 11224.2161 07/31/2022 11215.8189 11385.3397 11498.4738 08/31/2022 11109.3809 11157.6558 11173.5652 09/30/2022 10829.8259 10859.3626 10690.7981 10/31/2022 10752.1028 10811.5758 10552.327 11/30/2022 10966.5073 11046.3498 10940.3949 12/31/2022 10964.8748 11026.4011 10891.0465 01/31/2023 11221.7241 11232.1434 11226.0979 02/28/2023 11081.4492 11030.3918 10935.8444 03/31/2023 11234.4443 11283.5469 11213.6426 04/30/2023 11298.8679 11352.4197 11281.6023 05/31/2023 11238.5276 11268.3779 11158.7602 06/30/2023 11214.2249 11191.7746 11118.9646 07/31/2023 11259.6399 11221.0881 11111.2139 08/31/2023 11261.7984 11219.4692 11040.24 09/30/2023 11146.6948 11098.5986 10759.6881 10/31/2023 11079.9758 11047.2002 10589.8898 11/30/2023 11354.127 11341.6308 11069.4673 12/31/2023 11627.1233 11604.5809 11493.195 01/31/2024 11690.4388 11628.8278 11461.6339 02/29/2024 11628.9367 11513.2748 11299.6979 03/31/2024 11709.2239 11587.1629 11404.0404 04/30/2024 11591.2835 11430.8211 11115.9877 05/31/2024 11731.3271 11568.7101 11304.4398 06/30/2024 11815.2523 11660.9742 11411.4668 07/31/2024 12009.4724 11880.1489 11678.0004 08/31/2024 12119.8628 12016.8903 11845.8158 09/30/2024 12241.953 12147.2281 12004.424 Effective September 30, 2024, the Fund adopted the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Bloomberg U.S. Government/Credit Intermediate Total Return Index Value Unhedged as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Limited Term Income Fund Class R3 9.83% 1.84% 2.04% Bloomberg Intermediate U.S. Government/Credit Total Return Index Value Unhedged 9.45% 1.26% 1.96% Bloomberg U.S. Aggregate Total Return Value Index USD 11.57% 0.33% 1.84%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fli/THIRX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 6,430,200,000
Holdings Count | Holdings	652
Advisory Fees Paid, Amount	$ 20,800,000
Investment Company, Portfolio Turnover	59.42%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $6,430.2 Number of Holdings 652 Annual Portfolio Turnover 59.42% Total Advisory Fee $20.8
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) U.S. Government 30.1 AAA 19.9 AA 4.6 A 17.0 BBB 20.1 NR 0.3 Below Invest. Grade 0.1 Cash Equivalents & Other 7.7 Credit Quality Ratings (%) U.S. Government 30.1% AAA 19.9% AA 4.6% A 17.0% BBB 20.1% NR 0.3% Below Invest. Grade 0.1% Cash Equivalents & Other 7.7% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Limited Term Income Fund - Class R4
Shareholder Report [Line Items]
Class Name	CLASS: R4
Trading Symbol	THRIX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Limited Term Income Fund Class R4 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R4 $104.00 0.99%
Expenses Paid, Amount	$ 104
Expense Ratio, Percent	0.99%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R4 shares outperformed the Bloomberg Intermediate U.S. Government/Credit Total Return Index Value Unhedged (the “Index”) during the 12-month period ended September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. The Fund’s slight short duration versus the Index was a relative detractor in this environment. However, this was offset by positive relative returns from the Fund’s allocation to collateralized mortgage obligations, corporate bonds, and asset-backed securities
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Limited Term Income Fund Bloomberg Intermediate U.S. Government/Credit Total Return Index Value Unhedged Bloomberg U.S. Aggregate Total Return Value Index USD 09/30/2014 10000.0032 10000 10000 10/31/2014 10044.7786 10070.3226 10098.2769 11/30/2014 10068.6453 10121.0909 10169.91 12/31/2014 10017.2318 10089.052 10179.4256 01/31/2015 10108.3864 10256.6848 10392.8789 02/28/2015 10087.6798 10185.2608 10295.1602 03/31/2015 10134.2628 10235.0557 10342.967 04/30/2015 10142.3626 10231.4031 10305.856 05/31/2015 10157.7359 10232.4021 10281.0356 06/30/2015 10113.3621 10171.3008 10168.9318 07/31/2015 10128.5638 10207.7402 10239.6187 08/31/2015 10099.0956 10199.1337 10224.9146 09/30/2015 10123.866 10267.8682 10294.0811 10/31/2015 10123.0423 10257.2791 10295.7875 11/30/2015 10099.203 10231.0957 10268.5908 12/31/2015 10052.7795 10196.936 10235.4031 01/31/2016 10112.5886 10321.7051 10376.2558 02/29/2016 10143.087 10371.956 10449.8664 03/31/2016 10228.4583 10446.3359 10545.7404 04/30/2016 10275.6393 10474.0715 10586.2218 05/31/2016 10292.0432 10462.0531 10588.9383 06/30/2016 10392.5206 10611.9298 10779.1979 07/31/2016 10423.0055 10641.9861 10847.3436 08/31/2016 10437.5558 10614.6706 10834.9414 09/30/2016 10450.5119 10628.8508 10828.5941 10/31/2016 10440.7048 10584.9473 10745.7655 11/30/2016 10346.5974 10401.8279 10491.5864 12/31/2016 10353.411 10409.1588 10506.3861 01/31/2017 10383.0559 10437.2888 10527.0016 02/28/2017 10420.9996 10485.7672 10597.7522 03/31/2017 10428.0385 10490.5008 10592.197 04/30/2017 10474.6181 10555.767 10673.9358 05/31/2017 10520.4421 10608.4411 10756.0945 06/30/2017 10512.2081 10589.3632 10745.2712 07/31/2017 10550.8928 10638.3641 10791.5097 08/31/2017 10590.1172 10701.3353 10888.3034 09/30/2017 10566.8314 10653.0567 10836.4459 10/31/2017 10582.652 10652.1807 10842.724 11/30/2017 10567.8567 10619.4605 10828.8068 12/31/2017 10583.6702 10631.6377 10878.506 01/31/2018 10536.7816 10538.0724 10753.2186 02/28/2018 10506.1105 10489.6299 10651.2843 03/31/2018 10524.104 10527.3501 10719.5896 04/30/2018 10494.8873 10472.3605 10639.8655 05/31/2018 10537.5695 10534.932 10715.7993 06/30/2018 10533.5076 10528.0058 10702.6209 07/31/2018 10537.1721 10530.7671 10705.1619 08/31/2018 10588.5151 10593.0723 10774.0467 09/30/2018 10567.8353 10550.4955 10704.6676 10/31/2018 10547.8209 10536.0027 10620.0741 11/30/2018 10576.7274 10583.559 10683.4727 12/31/2018 10670.6549 10724.993 10879.7393 01/31/2019 10740.048 10818.0666 10995.2773 02/28/2019 10769.2035 10827.3493 10988.9087 03/31/2019 10872.0528 10973.8756 11199.9166 04/30/2019 10902.1514 10994.9821 11202.782 05/31/2019 10989.055 11138.4756 11401.6482 06/30/2019 11060.0579 11257.799 11544.8346 07/31/2019 11072.3798 11253.962 11570.2238 08/31/2019 11190.106 11453.5004 11870.0302 09/30/2019 11185.4057 11411.9738 11806.8123 10/31/2019 11212.2155 11457.2248 11842.3764 11/30/2019 11210.3055 11440.1193 11836.3427 12/31/2019 11220.8336 11454.4942 11828.0976 01/31/2020 11346.0593 11617.0809 12055.7234 02/29/2020 11437.403 11781.061 12272.7065 03/31/2020 11130.4184 11729.4064 12200.4833 04/30/2020 11417.853 11894.5341 12417.3601 05/31/2020 11586.384 11984.9847 12475.1769 06/30/2020 11770.2386 12058.8984 12553.758 07/31/2020 11903.5332 12148.934 12741.2746 08/31/2020 11902.3874 12134.5437 12638.4313 09/30/2020 11917.7152 12133.0427 12631.4992 10/31/2020 11897.4672 12106.4393 12575.0965 11/30/2020 11975.8601 12166.4545 12698.4914 12/31/2020 12012.8065 12191.48 12715.9864 01/31/2021 11997.7577 12157.6584 12624.817 02/28/2021 11923.7633 12058.3042 12442.5048 03/31/2021 11831.9855 11964.6876 12287.1394 04/30/2021 11886.4978 12023.96 12384.2096 05/31/2021 11923.3455 12072.2334 12424.6696 06/30/2021 11925.7261 12082.0592 12511.9637 07/31/2021 11987.6117 12174.5385 12651.8595 08/31/2021 11972.3049 12154.7844 12627.7727 09/30/2021 11930.6984 12084.8973 12518.4439 10/31/2021 11888.0679 12017.4282 12514.9938 11/30/2021 11871.9783 12031.3473 12552.0197 12/31/2021 11857.025 12015.8862 12519.9004 01/31/2022 11737.4682 11839.6059 12250.172 02/28/2022 11601.1362 11761.9166 12113.503 03/31/2022 11397.4915 11474.0792 11776.9683 04/30/2022 11204.2176 11244.7048 11330.0576 05/31/2022 11238.8754 11328.4034 11403.1101 06/30/2022 11082.1219 11202.4406 11224.2161 07/31/2022 11215.4928 11385.3397 11498.4738 08/31/2022 11108.944 11157.6558 11173.5652 09/30/2022 10837.691 10859.3626 10690.7981 10/31/2022 10759.8419 10811.5758 10552.327 11/30/2022 10965.7813 11046.3498 10940.3949 12/31/2022 10972.9196 11026.4011 10891.0465 01/31/2023 11230.1573 11232.1434 11226.0979 02/28/2023 11089.6863 11030.3918 10935.8444 03/31/2023 11242.8868 11283.5469 11213.6426 04/30/2023 11307.4058 11352.4197 11281.6023 05/31/2023 11246.9692 11268.3779 11158.7602 06/30/2023 11222.6112 11191.7746 11118.9646 07/31/2023 11259.1375 11221.0881 11111.2139 08/31/2023 11270.2389 11219.4692 11040.24 09/30/2023 11145.9616 11098.5986 10759.6881 10/31/2023 11079.0983 11047.2002 10589.8898 11/30/2023 11362.6571 11341.6308 11069.4673 12/31/2023 11627.0093 11604.5809 11493.195 01/31/2024 11699.4493 11628.8278 11461.6339 02/29/2024 11637.8473 11513.2748 11299.6979 03/31/2024 11718.05 11587.1629 11404.0404 04/30/2024 11599.8923 11430.8211 11115.9877 05/31/2024 11730.9538 11568.7101 11304.4398 06/30/2024 11824.1536 11660.9742 11411.4668 07/31/2024 12018.5597 11880.1489 11678.0004 08/31/2024 12128.9701 12016.8903 11845.8158 09/30/2024 12251.1184 12147.2281 12004.424 Effective September 30, 2024, the Fund adopted the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Bloomberg U.S. Government/Credit Intermediate Total Return Index Value Unhedged as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Limited Term Income Fund Class R4 9.92% 1.84% 2.05% Bloomberg Intermediate U.S. Government/Credit Total Return Index Value Unhedged 9.45% 1.26% 1.96% Bloomberg U.S. Aggregate Total Return Value Index USD 11.57% 0.33% 1.84%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fli/THRIX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 6,430,200,000
Holdings Count | Holdings	652
Advisory Fees Paid, Amount	$ 20,800,000
Investment Company, Portfolio Turnover	59.42%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $6,430.2 Number of Holdings 652 Annual Portfolio Turnover 59.42% Total Advisory Fee $20.8
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) U.S. Government 30.1 AAA 19.9 AA 4.6 A 17.0 BBB 20.1 NR 0.3 Below Invest. Grade 0.1 Cash Equivalents & Other 7.7 Credit Quality Ratings (%) U.S. Government 30.1% AAA 19.9% AA 4.6% A 17.0% BBB 20.1% NR 0.3% Below Invest. Grade 0.1% Cash Equivalents & Other 7.7% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Limited Term Income Fund - Class R5
Shareholder Report [Line Items]
Class Name	CLASS: R5
Trading Symbol	THRRX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Limited Term Income Fund Class R5 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R5 $52.00 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? The Fund’s Class R5 shares outperformed the Bloomberg Intermediate U.S. Government/Credit Total Return Index Value Unhedged (the “Index”) during the 12-month period ended September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. The Fund’s slight short duration versus the Index was a relative detractor in this environment. However, this was offset by positive relative returns from the Fund’s allocation to collateralized mortgage obligations, corporate bonds, and asset-backed securities
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Limited Term Income Fund Bloomberg Intermediate U.S. Government/Credit Total Return Index Value Unhedged Bloomberg U.S. Aggregate Total Return Value Index USD 09/30/2014 10000.0021 10000 10000 10/31/2014 10048.5551 10070.3226 10098.2769 11/30/2014 10075.4792 10121.0909 10169.91 12/31/2014 10027.1995 10089.052 10179.4256 01/31/2015 10121.121 10256.6848 10392.8789 02/28/2015 10102.8921 10185.2608 10295.1602 03/31/2015 10152.2717 10235.0557 10342.967 04/30/2015 10163.0672 10231.4031 10305.856 05/31/2015 10181.2382 10232.4021 10281.0356 06/30/2015 10131.9197 10171.3008 10168.9318 07/31/2015 10149.9157 10207.7402 10239.6187 08/31/2015 10130.7524 10199.1337 10224.9146 09/30/2015 10150.4527 10267.8682 10294.0811 10/31/2015 10161.2001 10257.2791 10295.7875 11/30/2015 10141.0756 10231.0957 10268.5908 12/31/2015 10098.1074 10196.936 10235.4031 01/31/2016 10161.6603 10321.7051 10376.2558 02/29/2016 10195.2295 10371.956 10449.8664 03/31/2016 10283.772 10446.3359 10545.7404 04/30/2016 10333.8932 10474.0715 10586.2218 05/31/2016 10353.2016 10462.0531 10588.9383 06/30/2016 10456.9515 10611.9298 10779.1979 07/31/2016 10490.4654 10641.9861 10847.3436 08/31/2016 10500.1882 10614.6706 10834.9414 09/30/2016 10516.0219 10628.8508 10828.5941 10/31/2016 10516.804 10584.9473 10745.7655 11/30/2016 10417.0993 10401.8279 10491.5864 12/31/2016 10426.9259 10409.1588 10506.3861 01/31/2017 10467.6535 10437.2888 10527.0016 02/28/2017 10508.7532 10485.7672 10597.7522 03/31/2017 10518.9814 10490.5008 10592.197 04/30/2017 10568.666 10555.767 10673.9358 05/31/2017 10617.7595 10608.4411 10756.0945 06/30/2017 10612.4397 10589.3632 10745.2712 07/31/2017 10646.6838 10638.3641 10791.5097 08/31/2017 10697.2462 10701.3353 10888.3034 09/30/2017 10676.8301 10653.0567 10836.4459 10/31/2017 10687.782 10652.1807 10842.724 11/30/2017 10675.6997 10619.4605 10828.8068 12/31/2017 10694.7537 10631.6377 10878.506 01/31/2018 10650.449 10538.0724 10753.2186 02/28/2018 10622.313 10489.6299 10651.2843 03/31/2018 10642.9963 10527.3501 10719.5896 04/30/2018 10616.2617 10472.3605 10639.8655 05/31/2018 10670.3919 10534.932 10715.7993 06/30/2018 10669.1244 10528.0058 10702.6209 07/31/2018 10675.7605 10530.7671 10705.1619 08/31/2018 10730.6608 10593.0723 10774.0467 09/30/2018 10704.4624 10550.4955 10704.6676 10/31/2018 10687.2065 10536.0027 10620.0741 11/30/2018 10719.3024 10583.559 10683.4727 12/31/2018 10817.418 10724.993 10879.7393 01/31/2019 10890.6226 10818.0666 10995.2773 02/28/2019 10924.3272 10827.3493 10988.9087 03/31/2019 11041.5413 10973.8756 11199.9166 04/30/2019 11076.6276 10994.9821 11202.782 05/31/2019 11169.5684 11138.4756 11401.6482 06/30/2019 11246.2834 11257.799 11544.8346 07/31/2019 11263.5897 11253.962 11570.2238 08/31/2019 11388.1541 11453.5004 11870.0302 09/30/2019 11379.7021 11411.9738 11806.8123 10/31/2019 11411.8303 11457.2248 11842.3764 11/30/2019 11414.5875 11440.1193 11836.3427 12/31/2019 11430.1579 11454.4942 11828.0976 01/31/2020 11562.699 11617.0809 12055.7234 02/29/2020 11668.8737 11781.061 12272.7065 03/31/2020 11352.3962 11729.4064 12200.4833 04/30/2020 11650.3059 11894.5341 12417.3601 05/31/2020 11827.1145 11984.9847 12475.1769 06/30/2020 12019.6685 12058.8984 12553.758 07/31/2020 12160.962 12148.934 12741.2746 08/31/2020 12173.4573 12134.5437 12638.4313 09/30/2020 12185.5268 12133.0427 12631.4992 10/31/2020 12178.6373 12106.4393 12575.0965 11/30/2020 12255.2195 12166.4545 12698.4914 12/31/2020 12306.9992 12191.48 12715.9864 01/31/2021 12296.7878 12157.6584 12624.817 02/28/2021 12225.7272 12058.3042 12442.5048 03/31/2021 12128.0706 11964.6876 12287.1394 04/30/2021 12197.3903 12023.96 12384.2096 05/31/2021 12231.5508 12072.2334 12424.6696 06/30/2021 12239.0176 12082.0592 12511.9637 07/31/2021 12307.716 12174.5385 12651.8595 08/31/2021 12297.2198 12154.7844 12627.7727 09/30/2021 12259.5344 12084.8973 12518.4439 10/31/2021 12220.875 12017.4282 12514.9938 11/30/2021 12209.4052 12031.3473 12552.0197 12/31/2021 12208.1109 12015.8862 12519.9004 01/31/2022 12081.3498 11839.6059 12250.172 02/28/2022 11945.6207 11761.9166 12113.503 03/31/2022 11740.9448 11474.0792 11776.9683 04/30/2022 11546.6352 11244.7048 11330.0576 05/31/2022 11587.2632 11328.4034 11403.1101 06/30/2022 11430.2556 11202.4406 11224.2161 07/31/2022 11581.5745 11385.3397 11498.4738 08/31/2022 11476.4691 11157.6558 11173.5652 09/30/2022 11192.0915 10859.3626 10690.7981 10/31/2022 11116.424 10811.5758 10552.327 11/30/2022 11342.8598 11046.3498 10940.3949 12/31/2022 11345.9714 11026.4011 10891.0465 01/31/2023 11616.8198 11232.1434 11226.0979 02/28/2023 11475.9183 11030.3918 10935.8444 03/31/2023 11639.3651 11283.5469 11213.6426 04/30/2023 11710.9478 11352.4197 11281.6023 05/31/2023 11653.2954 11268.3779 11158.7602 06/30/2023 11632.8208 11191.7746 11118.9646 07/31/2023 11684.8827 11221.0881 11111.2139 08/31/2023 11692.0444 11219.4692 11040.24 09/30/2023 11577.2036 11098.5986 10759.6881 10/31/2023 11512.6965 11047.2002 10589.8898 11/30/2023 11802.5346 11341.6308 11069.4673 12/31/2023 12091.6189 11604.5809 11493.195 01/31/2024 12162.6022 11628.8278 11461.6339 02/29/2024 12112.8175 11513.2748 11299.6979 03/31/2024 12192.0712 11587.1629 11404.0404 04/30/2024 12083.6342 11430.8211 11115.9877 05/31/2024 12225.21 11568.7101 11304.4398 06/30/2024 12317.7216 11660.9742 11411.4668 07/31/2024 12525.5311 11880.1489 11678.0004 08/31/2024 12646.0242 12016.8903 11845.8158 09/30/2024 12778.6631 12147.2281 12004.424 Effective September 30, 2024, the Fund adopted the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Bloomberg U.S. Government/Credit Intermediate Total Return Index Value Unhedged as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Limited Term Income Fund Class R5 10.38% 2.35% 2.48% Bloomberg Intermediate U.S. Government/Credit Total Return Index Value Unhedged 9.45% 1.26% 1.96% Bloomberg U.S. Aggregate Total Return Value Index USD 11.57% 0.33% 1.84%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fli/THRRX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 6,430,200,000
Holdings Count | Holdings	652
Advisory Fees Paid, Amount	$ 20,800,000
Investment Company, Portfolio Turnover	59.42%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $6,430.2 Number of Holdings 652 Annual Portfolio Turnover 59.42% Total Advisory Fee $20.8
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) U.S. Government 30.1 AAA 19.9 AA 4.6 A 17.0 BBB 20.1 NR 0.3 Below Invest. Grade 0.1 Cash Equivalents & Other 7.7 Credit Quality Ratings (%) U.S. Government 30.1% AAA 19.9% AA 4.6% A 17.0% BBB 20.1% NR 0.3% Below Invest. Grade 0.1% Cash Equivalents & Other 7.7% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Limited Term Income Fund - Class R6
Shareholder Report [Line Items]
Class Name	CLASS: R6
Trading Symbol	THRLX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Limited Term Income Fund Class R6 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R6 $44.00 0.42%
Expenses Paid, Amount	$ 44
Expense Ratio, Percent	0.42%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R6 shares outperformed the Bloomberg Intermediate U.S. Government/Credit Total Return Index Value Unhedged (the “Index”) during the 12-month period ended September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. The Fund’s slight short duration versus the Index was a relative detractor in this environment. However, this was offset by positive relative returns from the Fund’s allocation to collateralized mortgage obligations, corporate bonds, and asset-backed securities
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Limited Term Income Fund Bloomberg Intermediate U.S. Government/Credit Total Return Index Value Unhedged Bloomberg U.S. Aggregate Total Return Value Index USD 04/10/2017 10000.0046 10000 10000 04/30/2017 10045.1968 10045.4473 10052.775 05/31/2017 10102.7155 10095.5748 10130.1526 06/30/2017 10113.7141 10077.4193 10119.9591 07/31/2017 10167.8831 10124.0512 10163.5068 08/31/2017 10217.8346 10183.978 10254.6677 09/30/2017 10192.4369 10138.0335 10205.8279 10/31/2017 10212.4385 10137.1998 10211.7408 11/30/2017 10202.8637 10106.0615 10198.6334 12/31/2017 10222.8192 10117.65 10245.4405 01/31/2018 10182.3553 10028.6081 10127.444 02/28/2018 10157.0885 9982.5075 10031.4417 03/31/2018 10179.1333 10018.4041 10095.772 04/30/2018 10155.5776 9966.073 10020.6874 05/31/2018 10209.179 10025.6195 10092.2023 06/30/2018 10202.1384 10019.0282 10079.7908 07/31/2018 10218.1464 10021.6559 10082.184 08/31/2018 10264.7734 10080.949 10147.06 09/30/2018 10249.4346 10040.4306 10081.7184 10/31/2018 10234.8511 10026.6385 10002.0477 11/30/2018 10267.4543 10071.8956 10061.7569 12/31/2018 10363.2128 10206.492 10246.602 01/31/2019 10435.2199 10295.0659 10355.4163 02/28/2019 10468.0754 10303.8999 10349.4183 03/31/2019 10580.8245 10443.3423 10548.1468 04/30/2019 10615.0451 10463.4284 10550.8454 05/31/2019 10704.5945 10599.9847 10738.1388 06/30/2019 10778.6374 10713.5394 10872.9926 07/31/2019 10795.9025 10709.8879 10896.9043 08/31/2019 10915.7371 10899.7796 11179.2637 09/30/2019 10908.3445 10860.2607 11119.7248 10/31/2019 10939.7789 10903.3239 11153.2192 11/30/2019 10943.0911 10887.0454 11147.5366 12/31/2019 10958.6901 10900.7254 11139.7713 01/31/2020 11086.1888 11055.4518 11354.1506 02/29/2020 11188.43 11211.5043 11558.5066 03/31/2020 10886.3243 11162.3469 11490.4864 04/30/2020 11172.0536 11319.4915 11694.7422 05/31/2020 11341.9589 11405.5692 11749.1944 06/30/2020 11526.915 11475.9096 11823.2026 07/31/2020 11662.8178 11561.5924 11999.8067 08/31/2020 11675.5142 11547.8978 11902.9483 09/30/2020 11687.7844 11546.4694 11896.4197 10/31/2020 11681.9165 11521.1521 11843.2992 11/30/2020 11755.9166 11578.2659 11959.5133 12/31/2020 11806.2208 11602.0815 11975.9902 01/31/2021 11797.1949 11569.895 11890.1263 02/28/2021 11729.8296 11475.3441 11718.4236 03/31/2021 11637.0619 11386.2534 11572.0996 04/30/2021 11704.1434 11442.6603 11663.5208 05/31/2021 11737.5909 11488.5999 11701.6264 06/30/2021 11745.4951 11497.9507 11783.8404 07/31/2021 11812.023 11585.959 11915.5951 08/31/2021 11802.7123 11567.16 11892.91 09/30/2021 11767.3479 11500.6516 11789.9435 10/31/2021 11731.104 11436.4443 11786.6942 11/30/2021 11720.8312 11449.6904 11821.5654 12/31/2021 11720.3488 11434.9768 11791.3153 01/31/2022 11599.663 11267.2188 11537.2834 02/28/2022 11470.2887 11193.2854 11408.5678 03/31/2022 11274.916 10919.3635 11091.6175 04/30/2022 11089.4145 10701.0783 10670.7144 05/31/2022 11129.0487 10780.7304 10739.5156 06/30/2022 10979.28 10660.8573 10571.0322 07/31/2022 11124.9852 10834.9141 10829.3297 08/31/2022 11016.351 10618.2377 10523.3289 09/30/2022 10753.1436 10334.3654 10068.656 10/31/2022 10681.3127 10288.8889 9938.2431 11/30/2022 10890.3375 10512.3127 10303.7277 12/31/2022 10902.7526 10493.3284 10257.2511 01/31/2023 11163.1095 10689.1241 10572.8045 02/28/2023 11028.6792 10497.1263 10299.4421 03/31/2023 11186.1091 10738.0425 10561.074 04/30/2023 11255.4705 10803.5857 10625.0789 05/31/2023 11200.9172 10723.6069 10509.3854 06/30/2023 11181.9974 10650.707 10471.9057 07/31/2023 11223.7776 10678.6033 10464.6061 08/31/2023 11240.2929 10677.0627 10397.7624 09/30/2023 11121.9413 10562.0356 10133.5371 10/31/2023 11060.7996 10513.122 9973.62 11/30/2023 11348.5186 10793.3183 10425.2889 12/31/2023 11617.5164 11043.5561 10824.3581 01/31/2024 11695.4064 11066.6308 10794.6337 02/29/2024 11639.2837 10956.6642 10642.1215 03/31/2024 11725.2055 11026.9802 10740.3918 04/30/2024 11612.7772 10878.1968 10469.102 05/31/2024 11749.4088 11009.4195 10646.5874 06/30/2024 11848.1458 11097.2231 10747.386 07/31/2024 12048.361 11305.8017 10998.4089 08/31/2024 12164.7924 11435.9324 11156.4585 09/30/2024 12292.8648 11559.969 11305.8365 Effective September 30, 2024, the Fund adopted the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Bloomberg U.S. Government/Credit Intermediate Total Return Index Value Unhedged as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year Limited Term Income Fund Class R6 10.53% 2.42% Bloomberg Intermediate U.S. Government/Credit Total Return Index Value Unhedged 9.45% 1.26% Bloomberg U.S. Aggregate Total Return Value Index USD 11.57% 0.33%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fli/THRLX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 6,430,200,000
Holdings Count | Holdings	652
Advisory Fees Paid, Amount	$ 20,800,000
Investment Company, Portfolio Turnover	59.42%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $6,430.2 Number of Holdings 652 Annual Portfolio Turnover 59.42% Total Advisory Fee $20.8
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) U.S. Government 30.1 AAA 19.9 AA 4.6 A 17.0 BBB 20.1 NR 0.3 Below Invest. Grade 0.1 Cash Equivalents & Other 7.7 Credit Quality Ratings (%) U.S. Government 30.1% AAA 19.9% AA 4.6% A 17.0% BBB 20.1% NR 0.3% Below Invest. Grade 0.1% Cash Equivalents & Other 7.7% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Core Plus Bond Fund - Class A
Shareholder Report [Line Items]
Class Name	CLASS: A
Trading Symbol	THCAX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Core Plus Bond Fund Class A Shares for the period from October 2, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $79.00 0.75% Fund costs may be higher for a full one year period.
Expenses Paid, Amount	$ 79
Expense Ratio, Percent	0.75%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class A shares outperformed the Bloomberg U.S. Aggregate Total Return Index Value USD (the “Index”) during the period from the Fund’s inception on October 2, 2023 to September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. Security selection in corporate bonds, and to a lesser extent asset-backed securities, proved to be beneficial to the Fund’s relative performance. This was partially offset by performance from the Fund’s positioning along the U.S. Treasury yield curve. In particular, the Fund’s overweight to the 10-year part of the curve and underweight to the shorter part of the curve was a detractor to the Fund’s relative performance because longer-maturity securities tended to underperform shorter maturity securities during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Core Plus Bond Fund Bloomberg U.S. Aggregate Total Return Value Index USD 10/02/2023 9551.1 10000 10/31/2023 9415.3767 9910.2343 11/30/2023 9886.1485 10359.0328 12/31/2023 10268.5481 10755.5657 01/31/2024 10275.269 10726.0302 02/29/2024 10125.3594 10574.4872 03/31/2024 10210.9892 10672.133 04/30/2024 9938.1227 10402.5674 05/31/2024 10121.9347 10578.9248 06/30/2024 10227.6145 10679.0828 07/31/2024 10460.2072 10928.5103 08/31/2024 10611.6763 11085.5555 09/30/2024 10745.2473 11233.9842
Average Annual Return [Table Text Block]	Annual Performance Since Inception Core Plus Bond Fund Class A (with sales charge) 7.45% Core Plus Bond Fund Class A (without sales charge) 12.50% Bloomberg U.S. Aggregate Total Return Value Index USD 12.34%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment and assumes the deduction of the maximum sales charge associated with that investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fcb/THCAX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 165,500,000
Holdings Count | Holdings	381
Advisory Fees Paid, Amount	$ 0
Investment Company, Portfolio Turnover	73.32%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $165.5 Number of Holdings 381 Annual Portfolio Turnover 73.32% Total Advisory Fee $0.0
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) U.S. Government 46.7 AAA 10.6 AA 3.1 A 11.1 BBB 16.9 NR 2.6 Below Invest. Grade 5.7 Cash Equivalents & Other 3.3 Credit Quality Ratings (%) U.S. Government 46.7% AAA 10.6% AA 3.1% A 11.1% BBB 16.9% NR 2.6% Below Invest. Grade 5.7% Cash Equivalents & Other 3.3% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 2, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Core Plus Bond Fund - Class C
Shareholder Report [Line Items]
Class Name	CLASS: C
Trading Symbol	THCCX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Core Plus Bond Fund Class C Shares for the period from October 2, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $158.00 1.50% Fund costs may be higher for a full one year period.
Expenses Paid, Amount	$ 158
Expense Ratio, Percent	1.50%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class C shares underperformed the Bloomberg U.S. Aggregate Total Return Index Value USD (the “Index”) during the period from the Fund’s inception on October 2, 2023 to September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. Security selection in corporate bonds, and to a lesser extent asset-backed securities, proved to be beneficial to the Fund’s relative performance. This was partially offset by performance from the Fund’s positioning along the U.S. Treasury yield curve. In particular, the Fund’s overweight to the 10-year part of the curve and underweight to the shorter part of the curve was a detractor to the Fund’s relative performance because longer-maturity securities tended to underperform shorter maturity securities during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Core Plus Bond Fund Bloomberg U.S. Aggregate Total Return Value Index USD 10/02/2023 10000 10000 10/31/2023 9852.1409 9910.2343 11/30/2023 10336.9707 10359.0328 12/31/2023 10732.0267 10755.5657 01/31/2024 10732.2032 10726.0302 02/29/2024 10569.3459 10574.4872 03/31/2024 10662.1559 10672.133 04/30/2024 10371.7673 10402.5674 05/31/2024 10546.6426 10578.9248 06/30/2024 10649.9725 10679.0828 07/31/2024 10885.219 10928.5103 08/31/2024 11036.0102 11085.5555 09/30/2024 11178.2135 11233.9842
Average Annual Return [Table Text Block]	Annual Performance Since Inception Core Plus Bond Fund Class C (with sales charge) 10.78% Core Plus Bond Fund Class C (without sales charge) 11.78% Bloomberg U.S. Aggregate Total Return Value Index USD 12.34%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fcb/THCCX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 165,500,000
Holdings Count | Holdings	381
Advisory Fees Paid, Amount	$ 0
Investment Company, Portfolio Turnover	73.32%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $165.5 Number of Holdings 381 Annual Portfolio Turnover 73.32% Total Advisory Fee $0.0
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) U.S. Government 46.7 AAA 10.6 AA 3.1 A 11.1 BBB 16.9 NR 2.6 Below Invest. Grade 5.7 Cash Equivalents & Other 3.3 Credit Quality Ratings (%) U.S. Government 46.7% AAA 10.6% AA 3.1% A 11.1% BBB 16.9% NR 2.6% Below Invest. Grade 5.7% Cash Equivalents & Other 3.3% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 2, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Core Plus Bond Fund - Class I
Shareholder Report [Line Items]
Class Name	CLASS: I
Trading Symbol	THCIX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Core Plus Bond Fund Class I Shares for the period from October 2, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $48.00 0.46% Fund costs may be higher for a full one year period.
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? The Fund’s Class I shares outperformed the Bloomberg U.S. Aggregate Total Return Index Value USD (the “Index”) during the period from the Fund’s inception on October 2, 2023 to September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. Security selection in corporate bonds, and to a lesser extent asset-backed securities, proved to be beneficial to the Fund’s relative performance. This was partially offset by performance from the Fund’s positioning along the U.S. Treasury yield curve. In particular, the Fund’s overweight to the 10-year part of the curve and underweight to the shorter part of the curve was a detractor to the Fund’s relative performance because longer-maturity securities tended to underperform shorter maturity securities during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Core Plus Bond Fund Bloomberg U.S. Aggregate Total Return Value Index USD 10/02/2023 10000 10000 10/31/2023 9859.8496 9910.2343 11/30/2023 10345.5479 10359.0328 12/31/2023 10758.9632 10755.5657 01/31/2024 10768.3492 10726.0302 02/29/2024 10613.3489 10574.4872 03/31/2024 10705.3602 10672.133 04/30/2024 10422.4091 10402.5674 05/31/2024 10617.3382 10578.9248 06/30/2024 10730.397 10679.0828 07/31/2024 10976.7037 10928.5103 08/31/2024 11127.3458 11085.5555 09/30/2024 11280.3632 11233.9842
Average Annual Return [Table Text Block]	Annual Performance Since Inception Core Plus Bond Fund Class I 12.80% Bloomberg U.S. Aggregate Total Return Value Index USD 12.34%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fcb/THCIX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 165,500,000
Holdings Count | Holdings	381
Advisory Fees Paid, Amount	$ 0
Investment Company, Portfolio Turnover	73.32%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $165.5 Number of Holdings 381 Annual Portfolio Turnover 73.32% Total Advisory Fee $0.0
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) U.S. Government 46.7 AAA 10.6 AA 3.1 A 11.1 BBB 16.9 NR 2.6 Below Invest. Grade 5.7 Cash Equivalents & Other 3.3 Credit Quality Ratings (%) U.S. Government 46.7% AAA 10.6% AA 3.1% A 11.1% BBB 16.9% NR 2.6% Below Invest. Grade 5.7% Cash Equivalents & Other 3.3% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 2, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Core Plus Bond Fund - Class R3
Shareholder Report [Line Items]
Class Name	CLASS: R3
Trading Symbol	THCHX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Core Plus Bond Fund Class R3 Shares for the period from October 2, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R3 $106.00 1.00% Fund costs may be higher for a full one year period.
Expenses Paid, Amount	$ 106
Expense Ratio, Percent	1%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R3 shares performed in-line with the Bloomberg U.S. Aggregate Total Return Index Value USD (the “Index”) during the period from the Fund’s inception on October 2, 2023 to September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. Security selection in corporate bonds, and to a lesser extent asset-backed securities, proved to be beneficial to the Fund’s relative performance. This was partially offset by performance from the Fund’s positioning along the U.S. Treasury yield curve. In particular, the Fund’s overweight to the 10-year part of the curve and underweight to the shorter part of the curve was a detractor to the Fund’s relative performance because longer-maturity securities tended to underperform shorter maturity securities during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Core Plus Bond Fund Bloomberg U.S. Aggregate Total Return Value Index USD 10/02/2023 10000 10000 10/31/2023 9855.9412 9910.2343 11/30/2023 10335.5752 10359.0328 12/31/2023 10745.2186 10755.5657 01/31/2024 10750.0112 10726.0302 02/29/2024 10591.0611 10574.4872 03/31/2024 10678.3734 10672.133 04/30/2024 10390.4276 10402.5674 05/31/2024 10570.2126 10578.9248 06/30/2024 10688.7889 10679.0828 07/31/2024 10929.6346 10928.5103 08/31/2024 11075.4076 11085.5555 09/30/2024 11223.2152 11233.9842
Average Annual Return [Table Text Block]	Annual Performance Since Inception Core Plus Bond Fund Class R3 12.23% Bloomberg U.S. Aggregate Total Return Value Index USD 12.34%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fcb/THCHX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 165,500,000
Holdings Count | Holdings	381
Advisory Fees Paid, Amount	$ 0
Investment Company, Portfolio Turnover	73.32%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $165.5 Number of Holdings 381 Annual Portfolio Turnover 73.32% Total Advisory Fee $0.0
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) U.S. Government 46.7 AAA 10.6 AA 3.1 A 11.1 BBB 16.9 NR 2.6 Below Invest. Grade 5.7 Cash Equivalents & Other 3.3 Credit Quality Ratings (%) U.S. Government 46.7% AAA 10.6% AA 3.1% A 11.1% BBB 16.9% NR 2.6% Below Invest. Grade 5.7% Cash Equivalents & Other 3.3% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 2, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Core Plus Bond Fund - Class R4
Shareholder Report [Line Items]
Class Name	CLASS: R4
Trading Symbol	THCEX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Core Plus Bond Fund Class R4 Shares for the period from October 2, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R4 $79.00 0.75% Fund costs may be higher for a full one year period.
Expenses Paid, Amount	$ 79
Expense Ratio, Percent	0.75%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R4 shares outperformed the Bloomberg U.S. Aggregate Total Return Index Value USD (the “Index”) during the period from the Fund’s inception on October 2, 2023 to September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. Security selection in corporate bonds, and to a lesser extent asset-backed securities, proved to be beneficial to the Fund’s relative performance. This was partially offset by performance from the Fund’s positioning along the U.S. Treasury yield curve. In particular, the Fund’s overweight to the 10-year part of the curve and underweight to the shorter part of the curve was a detractor to the Fund’s relative performance because longer-maturity securities tended to underperform shorter maturity securities during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Core Plus Bond Fund Bloomberg U.S. Aggregate Total Return Value Index USD 10/02/2023 10000 10000 10/31/2023 9857.9052 9910.2343 11/30/2023 10339.7099 10359.0328 12/31/2023 10751.6922 10755.5657 01/31/2024 10758.7986 10726.0302 02/29/2024 10601.8251 10574.4872 03/31/2024 10691.4693 10672.133 04/30/2024 10405.3334 10402.5674 05/31/2024 10587.5484 10578.9248 06/30/2024 10708.559 10679.0828 07/31/2024 10952.1266 10928.5103 08/31/2024 11100.4732 11085.5555 09/30/2024 11250.9951 11233.9842
Average Annual Return [Table Text Block]	Annual Performance Since Inception Core Plus Bond Fund Class R4 12.51% Bloomberg U.S. Aggregate Total Return Value Index USD 12.34%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fcb/THCEX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 165,500,000
Holdings Count | Holdings	381
Advisory Fees Paid, Amount	$ 0
Investment Company, Portfolio Turnover	73.32%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $165.5 Number of Holdings 381 Annual Portfolio Turnover 73.32% Total Advisory Fee $0.0
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) U.S. Government 46.7 AAA 10.6 AA 3.1 A 11.1 BBB 16.9 NR 2.6 Below Invest. Grade 5.7 Cash Equivalents & Other 3.3 Credit Quality Ratings (%) U.S. Government 46.7% AAA 10.6% AA 3.1% A 11.1% BBB 16.9% NR 2.6% Below Invest. Grade 5.7% Cash Equivalents & Other 3.3% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 2, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Core Plus Bond Fund - Class R5
Shareholder Report [Line Items]
Class Name	CLASS: R5
Trading Symbol	THCFX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Core Plus Bond Fund Class R5 Shares for the period from October 2, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R5 $53.00 0.50% Fund costs may be higher for a full one year period.
Expenses Paid, Amount	$ 53
Expense Ratio, Percent	0.50%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R5 shares outperformed the Bloomberg U.S. Aggregate Total Return Index Value USD (the “Index”) during the period from the Fund’s inception on October 2, 2023 to September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. Security selection in corporate bonds, and to a lesser extent asset-backed securities, proved to be beneficial to the Fund’s relative performance. This was partially offset by performance from the Fund’s positioning along the U.S. Treasury yield curve. In particular, the Fund’s overweight to the 10-year part of the curve and underweight to the shorter part of the curve was a detractor to the Fund’s relative performance because longer-maturity securities tended to underperform shorter maturity securities during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Core Plus Bond Fund Bloomberg U.S. Aggregate Total Return Value Index USD 10/02/2023 10000 10000 10/31/2023 9859.8594 9910.2343 11/30/2023 10343.8345 10359.0328 12/31/2023 10758.1659 10755.5657 01/31/2024 10767.586 10726.0302 02/29/2024 10612.589 10574.4872 03/31/2024 10704.5862 10672.133 04/30/2024 10420.2392 10402.5674 05/31/2024 10604.9047 10578.9248 06/30/2024 10728.3497 10679.0828 07/31/2024 10974.6503 10928.5103 08/31/2024 11125.5706 11085.5555 09/30/2024 11278.8288 11233.9842
Average Annual Return [Table Text Block]	Annual Performance Since Inception Core Plus Bond Fund Class R5 12.79% Bloomberg U.S. Aggregate Total Return Value Index USD 12.34%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fcb/THCFX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 165,500,000
Holdings Count | Holdings	381
Advisory Fees Paid, Amount	$ 0
Investment Company, Portfolio Turnover	73.32%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $165.5 Number of Holdings 381 Annual Portfolio Turnover 73.32% Total Advisory Fee $0.0
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) U.S. Government 46.7 AAA 10.6 AA 3.1 A 11.1 BBB 16.9 NR 2.6 Below Invest. Grade 5.7 Cash Equivalents & Other 3.3 Credit Quality Ratings (%) U.S. Government 46.7% AAA 10.6% AA 3.1% A 11.1% BBB 16.9% NR 2.6% Below Invest. Grade 5.7% Cash Equivalents & Other 3.3% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 2, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Core Plus Bond Fund - Class R6
Shareholder Report [Line Items]
Class Name	CLASS: R6
Trading Symbol	THCSX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Core Plus Bond Fund Class R6 Shares for the period from October 2, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R6 $52.00 0.49% Fund costs may be higher for a full one year period.
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? The Fund’s Class R6 shares outperformed the Bloomberg U.S. Aggregate Total Return Index Value USD (the “Index”) during the period from the Fund’s inception on October 2, 2023 to September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. Security selection in corporate bonds, and to a lesser extent asset-backed securities, proved to be beneficial to the Fund’s relative performance. This was partially offset by performance from the Fund’s positioning along the U.S. Treasury yield curve. In particular, the Fund’s overweight to the 10-year part of the curve and underweight to the shorter part of the curve was a detractor to the Fund’s relative performance because longer-maturity securities tended to underperform shorter maturity securities during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Core Plus Bond Fund Bloomberg U.S. Aggregate Total Return Value Index USD 10/02/2023 10000 10000 10/31/2023 9859.9379 9910.2343 11/30/2023 10344.0089 10359.0328 12/31/2023 10758.4317 10755.5657 01/31/2024 10767.9464 10726.0302 02/29/2024 10613.3802 10574.4872 03/31/2024 10705.4857 10672.133 04/30/2024 10422.6018 10402.5674 05/31/2024 10617.6672 10578.9248 06/30/2024 10730.8727 10679.0828 07/31/2024 10977.3144 10928.5103 08/31/2024 11128.345 11085.5555 09/30/2024 11281.7902 11233.9842
Average Annual Return [Table Text Block]	Annual Performance Since Inception Core Plus Bond Fund Class R6 12.82% Bloomberg U.S. Aggregate Total Return Value Index USD 12.34%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fcb/THCSX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 165,500,000
Holdings Count | Holdings	381
Advisory Fees Paid, Amount	$ 0
Investment Company, Portfolio Turnover	73.32%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $165.5 Number of Holdings 381 Annual Portfolio Turnover 73.32% Total Advisory Fee $0.0
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) U.S. Government 46.7 AAA 10.6 AA 3.1 A 11.1 BBB 16.9 NR 2.6 Below Invest. Grade 5.7 Cash Equivalents & Other 3.3 Credit Quality Ratings (%) U.S. Government 46.7% AAA 10.6% AA 3.1% A 11.1% BBB 16.9% NR 2.6% Below Invest. Grade 5.7% Cash Equivalents & Other 3.3% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 2, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Strategic Income Fund - Class A
Shareholder Report [Line Items]
Class Name	CLASS: A
Trading Symbol	TSIAX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Strategic Income Fund Class A Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $102.00 0.97%
Expenses Paid, Amount	$ 102
Expense Ratio, Percent	0.97%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class A shares underperformed the Bloomberg U.S. Universal Total Return Index Value Unhedged (the “Index”) during the 12-month period ended September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. The Fund’s structural short duration versus the Index was a relative detractor in this environment. However, this was offset by positive relative returns from the Fund’s allocation to corporates and collateralized mortgage obligations. The Fund’s exposure to asset-backed securities was a modest detractor, while exposure to mortgage-passthrough securities proved to be neither a material contributor nor a detractor to the Fund’s performance.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Strategic Income Fund Bloomberg U.S. Universal Total Return Index Value Unhedged Thornburg Strategic Income Fund’s Blended Index Bloomberg U.S. Aggregate Total Return Value Index USD 09/30/2014 9552.9445 10000 10000 10000 10/31/2014 9580.3982 10097.9156 10091.5595 10098.2769 11/30/2014 9545.3134 10152.4007 10189.2764 10169.91 12/31/2014 9407.5203 10134.0706 10164.0428 10179.4256 01/31/2015 9389.4936 10326.9713 10297.7135 10392.8789 02/28/2015 9485.957 10266.7871 10340.9202 10295.1602 03/31/2015 9469.8279 10309.1667 10346.9614 10342.967 04/30/2015 9583.1458 10297.2026 10365.7936 10305.856 05/31/2015 9599.3924 10279.1756 10352.9634 10281.0356 06/30/2015 9524.0148 10164.4658 10214.5069 10168.9318 07/31/2015 9491.3107 10223.6598 10307.9799 10239.6187 08/31/2015 9376.4644 10193.5273 10159.713 10224.9146 09/30/2015 9269.4479 10233.421 10139.7461 10294.0811 10/31/2015 9364.4538 10266.1404 10301.7941 10295.7875 11/30/2015 9316.6752 10228.692 10269.7724 10268.5908 12/31/2015 9187.7377 10177.6021 10207.116 10235.4031 01/31/2016 9122.0792 10289.9473 10197.36 10376.2558 02/29/2016 9114.7595 10363.0455 10240.0546 10449.8664 03/31/2016 9359.4312 10490.0427 10454.1897 10545.7404 04/30/2016 9543.8839 10561.5241 10519.3782 10586.2218 05/31/2016 9575.6135 10569.7697 10533.354 10588.9383 06/30/2016 9649.8268 10755.8396 10661.1569 10779.1979 07/31/2016 9790.1119 10844.4789 10805.1599 10847.3436 08/31/2016 9871.0609 10856.1803 10797.0727 10834.9414 09/30/2016 9890.2736 10858.7671 10803.4833 10828.5941 10/31/2016 9918.0817 10786.7199 10695.5582 10745.7655 11/30/2016 9833.4318 10544.2651 10523.9235 10491.5864 12/31/2016 9894.623 10575.59 10586.1638 10506.3861 01/31/2017 9981.74 10612.897 10653.881 10527.0016 02/28/2017 10076.5627 10694.7863 10770.279 10597.7522 03/31/2017 10106.841 10691.2092 10788.7073 10592.197 04/30/2017 10195.7671 10779.9092 10887.2607 10673.9358 05/31/2017 10276.2359 10863.0718 11000.3642 10756.0945 06/30/2017 10304.5903 10853.8764 10999.9736 10745.2712 07/31/2017 10368.0076 10907.9371 11090.4925 10791.5097 08/31/2017 10414.0614 11002.0533 11173.1962 10888.3034 09/30/2017 10425.0509 10963.3317 11180.7795 10836.4459 10/31/2017 10451.5159 10976.4881 11228.2216 10842.724 11/30/2017 10466.9904 10959.8758 11265.3495 10828.8068 12/31/2017 10489.146 11008.197 11337.1814 10878.506 01/31/2018 10493.5834 10902.2582 11352.4461 10753.2186 02/28/2018 10462.4327 10798.886 11172.294 10651.2843 03/31/2018 10449.7261 10853.351 11180.908 10719.5896 04/30/2018 10445.9258 10780.9399 11140.0801 10639.8655 05/31/2018 10462.9466 10839.7297 11217.6448 10715.7993 06/30/2018 10471.024 10824.0066 11205.5381 10702.6209 07/31/2018 10507.0322 10846.6616 11277.6641 10705.1619 08/31/2018 10561.1866 10900.0958 11363.6265 10774.0467 09/30/2018 10570.2314 10853.3914 11317.7408 10704.6676 10/31/2018 10506.7231 10762.5896 11079.9828 10620.0741 11/30/2018 10506.7238 10810.9916 11158.0714 10683.4727 12/31/2018 10520.407 10980.1461 11152.3723 10879.7393 01/31/2019 10689.6439 11131.5363 11420.6629 10995.2773 02/28/2019 10749.2909 11143.6621 11484.0545 10988.9087 03/31/2019 10845.9198 11344.9094 11690.6344 11199.9166 04/30/2019 10905.924 11360.7739 11775.9355 11202.782 05/31/2019 10948.0525 11534.8191 11807.2714 11401.6482 06/30/2019 11064.5924 11697.9511 12081.5035 11544.8346 07/31/2019 11097.1912 11732.7723 12114.7278 11570.2238 08/31/2019 11183.8279 11998.266 12316.2999 11870.0302 09/30/2019 11195.7646 11946.2869 12316.245 11806.8123 10/31/2019 11235.9126 11984.8873 12408.6071 11842.3764 11/30/2019 11247.2085 11982.4823 12472.666 11836.3427 12/31/2019 11315.2041 12000.3476 12540.447 11828.0976 01/31/2020 11392.848 12215.7215 12718.2487 12055.7234 02/29/2020 11421.336 12398.6185 12686.372 12272.7065 03/31/2020 10668.951 12156.4467 12290.8562 12200.4833 04/30/2020 10964.3092 12399.9523 12734.1838 12417.3601 05/31/2020 11279.557 12515.7534 12904.6506 12475.1769 06/30/2020 11520.7826 12620.1967 13037.9479 12553.758 07/31/2020 11735.7135 12841.8759 13318.4978 12741.2746 08/31/2020 11835.517 12767.8279 13410.469 12638.4313 09/30/2020 11875.6397 12744.8092 13312.0547 12631.4992 10/31/2020 11925.6077 12699.2567 13182.8319 12575.0965 11/30/2020 12092.5612 12864.9755 13623.4342 12698.4914 12/31/2020 12204.8969 12909.4165 13753.9673 12715.9864 01/31/2021 12239.206 12828.2749 13647.7392 12624.817 02/28/2021 12262.3281 12662.7379 13560.0148 12442.5048 03/31/2021 12235.1821 12515.3896 13514.7933 12287.1394 04/30/2021 12315.4246 12620.6211 13726.0044 12384.2096 05/31/2021 12362.1428 12668.7604 13801.4253 12424.6696 06/30/2021 12406.004 12761.1183 13920.1403 12511.9637 07/31/2021 12469.4828 12889.2473 14094.5228 12651.8595 08/31/2021 12512.5861 12880.6582 14143.214 12627.7727 09/30/2021 12505.557 12770.6573 13927.8078 12518.4439 10/31/2021 12488.4204 12760.2291 14082.5127 12514.9938 11/30/2021 12459.6697 12775.6288 14054.1256 12552.0197 12/31/2021 12501.2979 12767.0195 14145.4901 12519.9004 01/31/2022 12369.466 12487.1164 13752.0001 12250.172 02/28/2022 12236.7903 12316.8706 13559.6996 12113.503 03/31/2022 12072.5714 11986.4232 13332.7546 11776.9683 04/30/2022 11867.4244 11539.3461 12706.4755 11330.0576 05/31/2022 11877.961 11602.8447 12773.942 11403.1101 06/30/2022 11610.1355 11371 12392.3213 11224.2161 07/31/2022 11797.0087 11656.8852 12831.3419 11498.4738 08/31/2022 11715.5595 11353.842 12433.995 11173.5652 09/30/2022 11458.2729 10864.6885 11773.0422 10690.7981 10/31/2022 11441.5881 10745.472 11820.1424 10552.327 11/30/2022 11654.9455 11146.1276 12332.2684 10940.3949 12/31/2022 11673.3007 11108.275 12183.0234 10891.0465 01/31/2023 11944.344 11452.8489 12655.2662 11226.0979 02/28/2023 11814.9749 11171.4301 12332.6595 10935.8444 03/31/2023 11981.5991 11433.5083 12659.4992 11213.6426 04/30/2023 12052.8286 11503.3528 12765.2599 11281.6023 05/31/2023 12029.093 11384.0958 12628.574 11158.7602 06/30/2023 12038.1948 11366.4124 12745.2937 11118.9646 07/31/2023 12112.831 11377.7096 12823.8162 11111.2139 08/31/2023 12112.296 11309.1788 12697.0243 11040.24 09/30/2023 11961.1631 11039.5219 12329.3555 10759.6881 10/31/2023 11875.4192 10873.4999 12102.1509 10589.8898 11/30/2023 12225.1399 11362.8555 12767.5212 11069.4673 12/31/2023 12522.5663 11794.0277 13283.8655 11493.195 01/31/2024 12568.6627 11765.7948 13286.5653 11461.6339 02/29/2024 12514.9618 11624.7317 13249.0534 11299.6979 03/31/2024 12615.2879 11738.8554 13432.0791 11404.0404 04/30/2024 12460.7812 11464.5503 13060.87 11115.9877 05/31/2024 12629.2077 11654.5813 13354.6483 11304.4398 06/30/2024 12733.7012 11761.1264 13510.1462 11411.4668 07/31/2024 12955.003 12028.0752 13810.2039 11678.0004 08/31/2024 13109.6228 12205.1518 14041.9705 11845.8158 09/30/2024 13254.4009 12372.5481 14243.8138 12004.424 Effective September 30, 2024, the Fund adopted the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Bloomberg U.S. Universal Total Return Index Value Unhedged as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Strategic Income Fund Class A (with sales charge) 5.82% 2.49% 2.86% Strategic Income Fund Class A (without sales charge) 10.81% 3.43% 3.33% Bloomberg U.S. Universal Total Return Index Value Unhedged 12.08% 0.70% 2.15% Strategic Income Fund’s Blended Index 15.53% 2.95% 3.60%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment and assumes the deduction of the maximum sales charge associated with that investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fsi/TSIAX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 9,454,200,000
Holdings Count | Holdings	1,154
Advisory Fees Paid, Amount	$ 41,200,000
Investment Company, Portfolio Turnover	60.47%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $9,454.2 Number of Holdings 1,154 Annual Portfolio Turnover 60.47% Total Advisory Fee $41.2
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Fixed Income Credit Quality (%) U.S. Government 26.5 AAA 10.7 AA 2.4 A 11.8 BBB 22.1 BB 12.2 B 4.1 CCC 0.1 D 0.0 NR 4.2 Cash Equivalents & Other 5.9 Fixed Income Credit Quality (%) U.S. Government 26.5% AAA 10.7% AA 2.4% A 11.8% BBB 22.1% BB 12.2% B 4.1% CCC 0.1% D 0.0% NR 4.2% Cash Equivalents & Other 5.9% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Strategic Income Fund - Class C
Shareholder Report [Line Items]
Class Name	CLASS: C
Trading Symbol	TSICX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Strategic Income Fund Class C Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $180.00 1.72%
Expenses Paid, Amount	$ 180
Expense Ratio, Percent	1.72%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class C shares underperformed the Bloomberg U.S. Universal Total Return Index Value Unhedged (the “Index”) during the 12-month period ended September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. The Fund’s structural short duration versus the Index was a relative detractor in this environment. However, this was offset by positive relative returns from the Fund’s allocation to corporates and collateralized mortgage obligations. The Fund’s exposure to asset-backed securities was a modest detractor, while exposure to mortgage-passthrough securities proved to be neither a material contributor nor a detractor to the Fund’s performance.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Strategic Income Fund Bloomberg U.S. Universal Total Return Index Value Unhedged Thornburg Strategic Income Fund’s Blended Index Bloomberg U.S. Aggregate Total Return Value Index USD 09/30/2014 10000.0038 10000 10000 10000 10/31/2014 10015.3651 10097.9156 10091.5595 10098.2769 11/30/2014 9973.7067 10152.4007 10189.2764 10169.91 12/31/2014 9832.6608 10134.0706 10164.0428 10179.4256 01/31/2015 9800.3932 10326.9713 10297.7135 10392.8789 02/28/2015 9905.2147 10266.7871 10340.9202 10295.1602 03/31/2015 9883.5677 10309.1667 10346.9614 10342.967 04/30/2015 9997.1183 10297.2026 10365.7936 10305.856 05/31/2015 10000.5629 10279.1756 10352.9634 10281.0356 06/30/2015 9917.2615 10164.4658 10214.5069 10168.9318 07/31/2015 9878.484 10223.6598 10307.9799 10239.6187 08/31/2015 9754.1183 10193.5273 10159.713 10224.9146 09/30/2015 9639.1792 10233.421 10139.7461 10294.0811 10/31/2015 9742.182 10266.1404 10301.7941 10295.7875 11/30/2015 9679.2751 10228.692 10269.7724 10268.5908 12/31/2015 9540.586 10177.6021 10207.116 10235.4031 01/31/2016 9467.8195 10289.9473 10197.36 10376.2558 02/29/2016 9456.052 10363.0455 10240.0546 10449.8664 03/31/2016 9714.5628 10490.0427 10454.1897 10545.7404 04/30/2016 9901.7206 10561.5241 10519.3782 10586.2218 05/31/2016 9921.2177 10569.7697 10533.354 10588.9383 06/30/2016 9993.6265 10755.8396 10661.1569 10779.1979 07/31/2016 10134.3529 10844.4789 10805.1599 10847.3436 08/31/2016 10213.3154 10856.1803 10797.0727 10834.9414 09/30/2016 10237.1115 10858.7671 10803.4833 10828.5941 10/31/2016 10253.3393 10786.7199 10695.5582 10745.7655 11/30/2016 10161.0185 10544.2651 10523.9235 10491.5864 12/31/2016 10219.5075 10575.59 10586.1638 10506.3861 01/31/2017 10313.6716 10612.897 10653.881 10527.0016 02/28/2017 10397.7085 10694.7863 10770.279 10597.7522 03/31/2017 10423.0968 10691.2092 10788.7073 10592.197 04/30/2017 10509.1623 10779.9092 10887.2607 10673.9358 05/31/2017 10586.2109 10863.0718 11000.3642 10756.0945 06/30/2017 10609.6015 10853.8764 10999.9736 10745.2712 07/31/2017 10668.9228 10907.9371 11090.4925 10791.5097 08/31/2017 10710.2438 11002.0533 11173.1962 10888.3034 09/30/2017 10724.6846 10963.3317 11180.7795 10836.4459 10/31/2017 10745.671 10976.4881 11228.2216 10842.724 11/30/2017 10746.4671 10959.8758 11265.3495 10828.8068 12/31/2017 10762.9967 11008.197 11337.1814 10878.506 01/31/2018 10761.3345 10902.2582 11352.4461 10753.2186 02/28/2018 10723.7487 10798.886 11172.294 10651.2843 03/31/2018 10704.1791 10853.351 11180.908 10719.5896 04/30/2018 10693.8659 10780.9399 11140.0801 10639.8655 05/31/2018 10713.875 10839.7297 11217.6448 10715.7993 06/30/2018 10706.475 10824.0066 11205.5381 10702.6209 07/31/2018 10736.6592 10846.6616 11277.6641 10705.1619 08/31/2018 10785.1972 10900.0958 11363.6265 10774.0467 09/30/2018 10788.1392 10853.3914 11317.7408 10704.6676 10/31/2018 10716.4893 10762.5896 11079.9828 10620.0741 11/30/2018 10719.286 10810.9916 11158.0714 10683.4727 12/31/2018 10717.2573 10980.1461 11152.3723 10879.7393 01/31/2019 10883.4819 11131.5363 11420.6629 10995.2773 02/28/2019 10938.1527 11143.6621 11484.0545 10988.9087 03/31/2019 11029.6486 11344.9094 11690.6344 11199.9166 04/30/2019 11084.3645 11360.7739 11775.9355 11202.782 05/31/2019 11120.5785 11534.8191 11807.2714 11401.6482 06/30/2019 11232.2028 11697.9511 12081.5035 11544.8346 07/31/2019 11258.0813 11732.7723 12114.7278 11570.2238 08/31/2019 11338.3278 11998.266 12316.2999 11870.0302 09/30/2019 11343.3775 11946.2869 12316.245 11806.8123 10/31/2019 11367.3203 11984.8873 12408.6071 11842.3764 11/30/2019 11381.2864 11982.4823 12472.666 11836.3427 12/31/2019 11433.3064 12000.3476 12540.447 11828.0976 01/31/2020 11514.3374 12215.7215 12718.2487 12055.7234 02/29/2020 11536.3806 12398.6185 12686.372 12272.7065 03/31/2020 10768.1612 12156.4467 12290.8562 12200.4833 04/30/2020 11059.5628 12399.9523 12734.1838 12417.3601 05/31/2020 11370.4248 12515.7534 12904.6506 12475.1769 06/30/2020 11606.8571 12620.1967 13037.9479 12553.758 07/31/2020 11816.8592 12841.8759 13318.4978 12741.2746 08/31/2020 11910.5529 12767.8279 13410.469 12638.4313 09/30/2020 11944.1579 12744.8092 13312.0547 12631.4992 10/31/2020 11976.7976 12699.2567 13182.8319 12575.0965 11/30/2020 12146.7282 12864.9755 13623.4342 12698.4914 12/31/2020 12241.9717 12909.4165 13753.9673 12715.9864 01/31/2021 12278.0394 12828.2749 13647.7392 12624.817 02/28/2021 12293.732 12662.7379 13560.0148 12442.5048 03/31/2021 12258.1161 12515.3896 13514.7933 12287.1394 04/30/2021 12320.5716 12620.6211 13726.0044 12384.2096 05/31/2021 12369.0932 12668.7604 13801.4253 12424.6696 06/30/2021 12404.7565 12761.1183 13920.1403 12511.9637 07/31/2021 12459.9427 12889.2473 14094.5228 12651.8595 08/31/2021 12495.2326 12880.6582 14143.214 12627.7727 09/30/2021 12480.4718 12770.6573 13927.8078 12518.4439 10/31/2021 12455.0211 12760.2291 14082.5127 12514.9938 11/30/2021 12418.2048 12775.6288 14054.1256 12552.0197 12/31/2021 12441.4185 12767.0195 14145.4901 12519.9004 01/31/2022 12302.0707 12487.1164 13752.0001 12250.172 02/28/2022 12172.9733 12316.8706 13559.6996 12113.503 03/31/2022 12001.4382 11986.4232 13332.7546 11776.9683 04/30/2022 11789.9136 11539.3461 12706.4755 11330.0576 05/31/2022 11793.066 11602.8447 12773.942 11403.1101 06/30/2022 11519.6538 11371 12392.3213 11224.2161 07/31/2022 11708.4508 11656.8852 12831.3419 11498.4738 08/31/2022 11620.2299 11353.842 12433.995 11173.5652 09/30/2022 11347.4996 10864.6885 11773.0422 10690.7981 10/31/2022 11334.2023 10745.472 11820.1424 10552.327 11/30/2022 11539.0716 11146.1276 12332.2684 10940.3949 12/31/2022 11550.3128 11108.275 12183.0234 10891.0465 01/31/2023 11801.4031 11452.8489 12655.2662 11226.0979 02/28/2023 11677.5273 11171.4301 12332.6595 10935.8444 03/31/2023 11835.5324 11433.5083 12659.4992 11213.6426 04/30/2023 11888.7478 11503.3528 12765.2599 11281.6023 05/31/2023 11858.3058 11384.0958 12628.574 11158.7602 06/30/2023 11871.0704 11366.4124 12745.2937 11118.9646 07/31/2023 11929.3396 11377.7096 12823.8162 11111.2139 08/31/2023 11921.7259 11309.1788 12697.0243 11040.24 09/30/2023 11765.82 11039.5219 12329.3555 10759.6881 10/31/2023 11674.2726 10873.4999 12102.1509 10589.8898 11/30/2023 12011.7535 11362.8555 12767.5212 11069.4673 12/31/2023 12296.9629 11794.0277 13283.8655 11493.195 01/31/2024 12334.6069 11765.7948 13286.5653 11461.6339 02/29/2024 12274.6024 11624.7317 13249.0534 11299.6979 03/31/2024 12365.4618 11738.8554 13432.0791 11404.0404 04/30/2024 12206.2297 11464.5503 13060.87 11115.9877 05/31/2024 12352.8329 11654.5813 13354.6483 11304.4398 06/30/2024 12447.6871 11761.1264 13510.1462 11411.4668 07/31/2024 12667.606 12028.0752 13810.2039 11678.0004 08/31/2024 12810.9635 12205.1518 14041.9705 11845.8158 09/30/2024 12944.7111 12372.5481 14243.8138 12004.424 Effective September 30, 2024, the Fund adopted the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Bloomberg U.S. Universal Total Return Index Value Unhedged as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Strategic Income Fund Class C (with sales charge) 9.02% 2.68% 2.61% Strategic Income Fund Class C (without sales charge) 10.02% 2.68% 2.61% Bloomberg U.S. Universal Total Return Index Value Unhedged 12.08% 0.70% 2.15% Strategic Income Fund’s Blended Index 15.53% 2.95% 3.60%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fsi/TSICX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 9,454,200,000
Holdings Count | Holdings	1,154
Advisory Fees Paid, Amount	$ 41,200,000
Investment Company, Portfolio Turnover	60.47%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $9,454.2 Number of Holdings 1,154 Annual Portfolio Turnover 60.47% Total Advisory Fee $41.2
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Fixed Income Credit Quality (%) U.S. Government 26.5 AAA 10.7 AA 2.4 A 11.8 BBB 22.1 BB 12.2 B 4.1 CCC 0.1 D 0.0 NR 4.2 Cash Equivalents & Other 5.9 Fixed Income Credit Quality (%) U.S. Government 26.5% AAA 10.7% AA 2.4% A 11.8% BBB 22.1% BB 12.2% B 4.1% CCC 0.1% D 0.0% NR 4.2% Cash Equivalents & Other 5.9% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Strategic Income Fund - Class I
Shareholder Report [Line Items]
Class Name	CLASS: I
Trading Symbol	TSIIX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Strategic Income Fund Class I Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $63.00 0.60%
Expenses Paid, Amount	$ 63
Expense Ratio, Percent	0.60%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class I shares underperformed the Bloomberg U.S. Universal Total Return Index Value Unhedged (the “Index”) during the 12-month period ended September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. The Fund’s structural short duration versus the Index was a relative detractor in this environment. However, this was offset by positive relative returns from the Fund’s allocation to corporates and collateralized mortgage obligations. The Fund’s exposure to asset-backed securities was a modest detractor, while exposure to mortgage-passthrough securities proved to be neither a material contributor nor a detractor to the Fund’s performance.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Strategic Income Fund Bloomberg U.S. Universal Total Return Index Value Unhedged Thornburg Strategic Income Fund’s Blended Index Bloomberg U.S. Aggregate Total Return Value Index USD 09/30/2014 9999.9949 10000 10000 10000 10/31/2014 10031.623 10097.9156 10091.5595 10098.2769 11/30/2014 9989.4726 10152.4007 10189.2764 10169.91 12/31/2014 9856.145 10134.0706 10164.0428 10179.4256 01/31/2015 9831.7379 10326.9713 10297.7135 10392.8789 02/28/2015 9943.9326 10266.7871 10340.9202 10295.1602 03/31/2015 9929.7987 10309.1667 10346.9614 10342.967 04/30/2015 10051.5088 10297.2026 10365.7936 10305.856 05/31/2015 10062.747 10279.1756 10352.9634 10281.0356 06/30/2015 9986.1583 10164.4658 10214.5069 10168.9318 07/31/2015 9954.5079 10223.6598 10307.9799 10239.6187 08/31/2015 9836.2718 10193.5273 10159.713 10224.9146 09/30/2015 9726.818 10233.421 10139.7461 10294.0811 10/31/2015 9838.2415 10266.1404 10301.7941 10295.7875 11/30/2015 9781.9376 10228.692 10269.7724 10268.5908 12/31/2015 9648.9233 10177.6021 10207.116 10235.4031 01/31/2016 9582.3398 10289.9473 10197.36 10376.2558 02/29/2016 9576.9659 10363.0455 10240.0546 10449.8664 03/31/2016 9846.2088 10490.0427 10454.1897 10545.7404 04/30/2016 10043.2219 10561.5241 10519.3782 10586.2218 05/31/2016 10070.6062 10569.7697 10533.354 10588.9383 06/30/2016 10151.493 10755.8396 10661.1569 10779.1979 07/31/2016 10302.3108 10844.4789 10805.1599 10847.3436 08/31/2016 10390.6054 10856.1803 10797.0727 10834.9414 09/30/2016 10422.4895 10858.7671 10803.4833 10828.5941 10/31/2016 10447.5544 10786.7199 10695.5582 10745.7655 11/30/2016 10360.932 10544.2651 10523.9235 10491.5864 12/31/2016 10428.4781 10575.59 10586.1638 10506.3861 01/31/2017 10532.5356 10612.897 10653.881 10527.0016 02/28/2017 10626.7805 10694.7863 10770.279 10597.7522 03/31/2017 10662.6863 10691.2092 10788.7073 10592.197 04/30/2017 10760.5281 10779.9092 10887.2607 10673.9358 05/31/2017 10849.6327 10863.0718 11000.3642 10756.0945 06/30/2017 10883.4845 10853.8764 10999.9736 10745.2712 07/31/2017 10954.6431 10907.9371 11090.4925 10791.5097 08/31/2017 11016.7128 11002.0533 11173.1962 10888.3034 09/30/2017 11032.3392 10963.3317 11180.7795 10836.4459 10/31/2017 11064.3408 10976.4881 11228.2216 10842.724 11/30/2017 11075.2379 10959.8758 11265.3495 10828.8068 12/31/2017 11102.7207 11008.197 11337.1814 10878.506 01/31/2018 11111.4478 10902.2582 11352.4461 10753.2186 02/28/2018 11081.9826 10798.886 11172.294 10651.2843 03/31/2018 11081.6336 10853.351 11180.908 10719.5896 04/30/2018 11071.5507 10780.9399 11140.0801 10639.8655 05/31/2018 11102.6958 10839.7297 11217.6448 10715.7993 06/30/2018 11105.1208 10824.0066 11205.5381 10702.6209 07/31/2018 11156.4666 10846.6616 11277.6641 10705.1619 08/31/2018 11207.8301 10900.0958 11363.6265 10774.0467 09/30/2018 11221.097 10853.3914 11317.7408 10704.6676 10/31/2018 11166.6782 10762.5896 11079.9828 10620.0741 11/30/2018 11170.0765 10810.9916 11158.0714 10683.4727 12/31/2018 11178.467 10980.1461 11152.3723 10879.7393 01/31/2019 11362.0825 11131.5363 11420.6629 10995.2773 02/28/2019 11439.008 11143.6621 11484.0545 10988.9087 03/31/2019 11536.7812 11344.9094 11690.6344 11199.9166 04/30/2019 11614.4935 11360.7739 11775.9355 11202.782 05/31/2019 11663.4933 11534.8191 11807.2714 11401.6482 06/30/2019 11782.1943 11697.9511 12081.5035 11544.8346 07/31/2019 11821.1216 11732.7723 12114.7278 11570.2238 08/31/2019 11927.2712 11998.266 12316.2999 11870.0302 09/30/2019 11933.565 11946.2869 12316.245 11806.8123 10/31/2019 11970.4477 11984.8873 12408.6071 11842.3764 11/30/2019 11996.2577 11982.4823 12472.666 11836.3427 12/31/2019 12062.579 12000.3476 12540.447 11828.0976 01/31/2020 12158.7908 12215.7215 12718.2487 12055.7234 02/29/2020 12182.6354 12398.6185 12686.372 12272.7065 03/31/2020 11391.2525 12156.4467 12290.8562 12200.4833 04/30/2020 11711.7838 12399.9523 12734.1838 12417.3601 05/31/2020 12053.748 12515.7534 12904.6506 12475.1769 06/30/2020 12306.0207 12620.1967 13037.9479 12553.758 07/31/2020 12548.7052 12841.8759 13318.4978 12741.2746 08/31/2020 12649.4724 12767.8279 13410.469 12638.4313 09/30/2020 12696.2228 12744.8092 13312.0547 12631.4992 10/31/2020 12751.3792 12699.2567 13182.8319 12575.0965 11/30/2020 12944.6401 12864.9755 13623.4342 12698.4914 12/31/2020 13058.3108 12909.4165 13753.9673 12715.9864 01/31/2021 13109.6882 12828.2749 13647.7392 12624.817 02/28/2021 13127.2197 12662.7379 13560.0148 12442.5048 03/31/2021 13101.8654 12515.3896 13514.7933 12287.1394 04/30/2021 13191.7513 12620.6211 13726.0044 12384.2096 05/31/2021 13256.3971 12668.7604 13801.4253 12424.6696 06/30/2021 13306.7792 12761.1183 13920.1403 12511.9637 07/31/2021 13378.6253 12889.2473 14094.5228 12651.8595 08/31/2021 13418.2877 12880.6582 14143.214 12627.7727 09/30/2021 13425.5158 12770.6573 13927.8078 12518.4439 10/31/2021 13410.8478 12760.2291 14082.5127 12514.9938 11/30/2021 13372.4043 12775.6288 14054.1256 12552.0197 12/31/2021 13420.805 12767.0195 14145.4901 12519.9004 01/31/2022 13282.9747 12487.1164 13752.0001 12250.172 02/28/2022 13143.5761 12316.8706 13559.6996 12113.503 03/31/2022 12981.2937 11986.4232 13332.7546 11776.9683 04/30/2022 12764.0605 11539.3461 12706.4755 11330.0576 05/31/2022 12779.5572 11602.8447 12773.942 11403.1101 06/30/2022 12494.6304 11371 12392.3213 11224.2161 07/31/2022 12700.3435 11656.8852 12831.3419 11498.4738 08/31/2022 12616.5291 11353.842 12433.995 11173.5652 09/30/2022 12342.6259 10864.6885 11773.0422 10690.7981 10/31/2022 12339.7966 10745.472 11820.1424 10552.327 11/30/2022 12574.1969 11146.1276 12332.2684 10940.3949 12/31/2022 12598.2467 11108.275 12183.0234 10891.0465 01/31/2023 12884.1626 11452.8489 12655.2662 11226.0979 02/28/2023 12759.6991 11171.4301 12332.6595 10935.8444 03/31/2023 12944.2275 11433.5083 12659.4992 11213.6426 04/30/2023 13014.2354 11503.3528 12765.2599 11281.6023 05/31/2023 12993.1523 11384.0958 12628.574 11158.7602 06/30/2023 13018.9943 11366.4124 12745.2937 11118.9646 07/31/2023 13102.918 11377.7096 12823.8162 11111.2139 08/31/2023 13095.1942 11309.1788 12697.0243 11040.24 09/30/2023 12947.44 11039.5219 12329.3555 10759.6881 10/31/2023 12847.1769 10873.4999 12102.1509 10589.8898 11/30/2023 13242.5341 11362.8555 12767.5212 11069.4673 12/31/2023 13557.5516 11794.0277 13283.8655 11493.195 01/31/2024 13611.7432 11765.7948 13286.5653 11461.6339 02/29/2024 13557.2917 11624.7317 13249.0534 11299.6979 03/31/2024 13682.4023 11738.8554 13432.0791 11404.0404 04/30/2024 13506.5462 11464.5503 13060.87 11115.9877 05/31/2024 13693.7149 11654.5813 13354.6483 11304.4398 06/30/2024 13811.3509 11761.1264 13510.1462 11411.4668 07/31/2024 14068.3956 12028.0752 13810.2039 11678.0004 08/31/2024 14228.626 12205.1518 14041.9705 11845.8158 09/30/2024 14402.6387 12372.5481 14243.8138 12004.424 Effective September 30, 2024, the Fund adopted the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Bloomberg U.S. Universal Total Return Index Value Unhedged as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Strategic Income Fund Class I 11.24% 3.83% 3.72% Bloomberg U.S. Universal Total Return Index Value Unhedged 12.08% 0.70% 2.15% Strategic Income Fund’s Blended Index 15.53% 2.95% 3.60%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fsi/TSIIX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 9,454,200,000
Holdings Count | Holdings	1,154
Advisory Fees Paid, Amount	$ 41,200,000
Investment Company, Portfolio Turnover	60.47%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $9,454.2 Number of Holdings 1,154 Annual Portfolio Turnover 60.47% Total Advisory Fee $41.2
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Fixed Income Credit Quality (%) U.S. Government 26.5 AAA 10.7 AA 2.4 A 11.8 BBB 22.1 BB 12.2 B 4.1 CCC 0.1 D 0.0 NR 4.2 Cash Equivalents & Other 5.9 Fixed Income Credit Quality (%) U.S. Government 26.5% AAA 10.7% AA 2.4% A 11.8% BBB 22.1% BB 12.2% B 4.1% CCC 0.1% D 0.0% NR 4.2% Cash Equivalents & Other 5.9% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Strategic Income Fund - Class R3
Shareholder Report [Line Items]
Class Name	CLASS: R3
Trading Symbol	TSIRX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Strategic Income Fund Class R3 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R3 $132.00 1.25%
Expenses Paid, Amount	$ 132
Expense Ratio, Percent	1.25%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R3 shares underperformed the Bloomberg U.S. Universal Total Return Index Value Unhedged (the “Index”) during the 12-month period ended September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. The Fund’s structural short duration versus the Index was a relative detractor in this environment. However, this was offset by positive relative returns from the Fund’s allocation to corporates and collateralized mortgage obligations. The Fund’s exposure to asset-backed securities was a modest detractor, while exposure to mortgage-passthrough securities proved to be neither a material contributor nor a detractor to the Fund’s performance.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Strategic Income Fund Bloomberg U.S. Universal Total Return Index Value Unhedged Thornburg Strategic Income Fund’s Blended Index Bloomberg U.S. Aggregate Total Return Value Index USD 09/30/2014 9999.9992 10000 10000 10000 10/31/2014 10020.0235 10097.9156 10091.5595 10098.2769 11/30/2014 9982.9027 10152.4007 10189.2764 10169.91 12/31/2014 9846.4671 10134.0706 10164.0428 10179.4256 01/31/2015 9818.7879 10326.9713 10297.7135 10392.8789 02/28/2015 9927.8861 10266.7871 10340.9202 10295.1602 03/31/2015 9902.4003 10309.1667 10346.9614 10342.967 04/30/2015 10020.6865 10297.2026 10365.7936 10305.856 05/31/2015 10028.8222 10279.1756 10352.9634 10281.0356 06/30/2015 9958.3343 10164.4658 10214.5069 10168.9318 07/31/2015 9924.075 10223.6598 10307.9799 10239.6187 08/31/2015 9803.8586 10193.5273 10159.713 10224.9146 09/30/2015 9692.861 10233.421 10139.7461 10294.0811 10/31/2015 9792.2523 10266.1404 10301.7941 10295.7875 11/30/2015 9742.1147 10228.692 10269.7724 10268.5908 12/31/2015 9607.1498 10177.6021 10207.116 10235.4031 01/31/2016 9538.3985 10289.9473 10197.36 10376.2558 02/29/2016 9530.7014 10363.0455 10240.0546 10449.8664 03/31/2016 9786.7365 10490.0427 10454.1897 10545.7404 04/30/2016 9979.7428 10561.5241 10519.3782 10586.2218 05/31/2016 10012.895 10569.7697 10533.354 10588.9383 06/30/2016 10090.4454 10755.8396 10661.1569 10779.1979 07/31/2016 10237.1522 10844.4789 10805.1599 10847.3436 08/31/2016 10321.6344 10856.1803 10797.0727 10834.9414 09/30/2016 10341.4427 10858.7671 10803.4833 10828.5941 10/31/2016 10372.2216 10786.7199 10695.5582 10745.7655 11/30/2016 10274.5984 10544.2651 10523.9235 10491.5864 12/31/2016 10347.5378 10575.59 10586.1638 10506.3861 01/31/2017 10438.6507 10612.897 10653.881 10527.0016 02/28/2017 10528.1389 10694.7863 10770.279 10597.7522 03/31/2017 10558.7491 10691.2092 10788.7073 10592.197 04/30/2017 10651.7151 10779.9092 10887.2607 10673.9358 05/31/2017 10734.7985 10863.0718 11000.3642 10756.0945 06/30/2017 10763.3518 10853.8764 10999.9736 10745.2712 07/31/2017 10828.565 10907.9371 11090.4925 10791.5097 08/31/2017 10884.7475 11002.0533 11173.1962 10888.3034 09/30/2017 10909.0326 10963.3317 11180.7795 10836.4459 10/31/2017 10935.5212 10976.4881 11228.2216 10842.724 11/30/2017 10941.2668 10959.8758 11265.3495 10828.8068 12/31/2017 10963.2384 11008.197 11337.1814 10878.506 01/31/2018 10975.9477 10902.2582 11352.4461 10753.2186 02/28/2018 10943.1164 10798.886 11172.294 10651.2843 03/31/2018 10928.2562 10853.351 11180.908 10719.5896 04/30/2018 10922.7149 10780.9399 11140.0801 10639.8655 05/31/2018 10938.8607 10839.7297 11217.6448 10715.7993 06/30/2018 10936.2908 10824.0066 11205.5381 10702.6209 07/31/2018 10981.6183 10846.6616 11277.6641 10705.1619 08/31/2018 11026.9436 10900.0958 11363.6265 10774.0467 09/30/2018 11035.0576 10853.3914 11317.7408 10704.6676 10/31/2018 10976.4617 10762.5896 11079.9828 10620.0741 11/30/2018 10974.793 10810.9916 11158.0714 10683.4727 12/31/2018 10977.8792 10980.1461 11152.3723 10879.7393 01/31/2019 11152.9591 11131.5363 11420.6629 10995.2773 02/28/2019 11223.1602 11143.6621 11484.0545 10988.9087 03/31/2019 11322.1943 11344.9094 11690.6344 11199.9166 04/30/2019 11383.0729 11360.7739 11775.9355 11202.782 05/31/2019 11425.2174 11534.8191 11807.2714 11401.6482 06/30/2019 11535.2423 11697.9511 12081.5035 11544.8346 07/31/2019 11567.1488 11732.7723 12114.7278 11570.2238 08/31/2019 11664.6278 11998.266 12316.2999 11870.0302 09/30/2019 11664.6897 11946.2869 12316.245 11806.8123 10/31/2019 11694.3099 11984.8873 12408.6071 11842.3764 11/30/2019 11703.4935 11982.4823 12472.666 11836.3427 12/31/2019 11771.6173 12000.3476 12540.447 11828.0976 01/31/2020 11858.9373 12215.7215 12718.2487 12055.7234 02/29/2020 11876.1094 12398.6185 12686.372 12272.7065 03/31/2020 11099.7072 12156.4467 12290.8562 12200.4833 04/30/2020 11395.4641 12399.9523 12734.1838 12417.3601 05/31/2020 11731.5643 12515.7534 12904.6506 12475.1769 06/30/2020 11970.8716 12620.1967 13037.9479 12553.758 07/31/2020 12199.9821 12841.8759 13318.4978 12741.2746 08/31/2020 12291.1204 12767.8279 13410.469 12638.4313 09/30/2020 12330.0167 12744.8092 13312.0547 12631.4992 10/31/2020 12376.6622 12699.2567 13182.8319 12575.0965 11/30/2020 12557.3931 12864.9755 13623.4342 12698.4914 12/31/2020 12660.9245 12909.4165 13753.9673 12715.9864 01/31/2021 12703.7459 12828.2749 13647.7392 12624.817 02/28/2021 12714.402 12662.7379 13560.0148 12442.5048 03/31/2021 12682.9832 12515.3896 13514.7933 12287.1394 04/30/2021 12763.131 12620.6211 13726.0044 12384.2096 05/31/2021 12818.7312 12668.7604 13801.4253 12424.6696 06/30/2021 12850.1026 12761.1183 13920.1403 12511.9637 07/31/2021 12922.8246 12889.2473 14094.5228 12651.8595 08/31/2021 12953.5516 12880.6582 14143.214 12627.7727 09/30/2021 12953.598 12770.6573 13927.8078 12518.4439 10/31/2021 12932.3766 12760.2291 14082.5127 12514.9938 11/30/2021 12888.5313 12775.6288 14054.1256 12552.0197 12/31/2021 12928.1945 12767.0195 14145.4901 12519.9004 01/31/2022 12788.6231 12487.1164 13752.0001 12250.172 02/28/2022 12648.3644 12316.8706 13559.6996 12113.503 03/31/2022 12485.592 11986.4232 13332.7546 11776.9683 04/30/2022 12270.4335 11539.3461 12706.4755 11330.0576 05/31/2022 12278.6148 11602.8447 12773.942 11403.1101 06/30/2022 11988.2318 11371 12392.3213 11224.2161 07/31/2022 12189.5382 11656.8852 12831.3419 11498.4738 08/31/2022 12102.5633 11353.842 12433.995 11173.5652 09/30/2022 11833.9146 10864.6885 11773.0422 10690.7981 10/31/2022 11813.9747 10745.472 11820.1424 10552.327 11/30/2022 12031.956 11146.1276 12332.2684 10940.3949 12/31/2022 12048.3477 11108.275 12183.0234 10891.0465 01/31/2023 12314.9288 11452.8489 12655.2662 11226.0979 02/28/2023 12189.9561 11171.4301 12332.6595 10935.8444 03/31/2023 12359.3926 11433.5083 12659.4992 11213.6426 04/30/2023 12430.5948 11503.3528 12765.2599 11281.6023 05/31/2023 12403.6585 11384.0958 12628.574 11158.7602 06/30/2023 12410.6864 11366.4124 12745.2937 11118.9646 07/31/2023 12486.0081 11377.7096 12823.8162 11111.2139 08/31/2023 12482.9709 11309.1788 12697.0243 11040.24 09/30/2023 12324.6711 11039.5219 12329.3555 10759.6881 10/31/2023 12233.7824 10873.4999 12102.1509 10589.8898 11/30/2023 12591.8405 11362.8555 12767.5212 11069.4673 12/31/2023 12895.4634 11794.0277 13283.8655 11493.195 01/31/2024 12939.912 11765.7948 13286.5653 11461.6339 02/29/2024 12881.6942 11624.7317 13249.0534 11299.6979 03/31/2024 12981.9354 11738.8554 13432.0791 11404.0404 04/30/2024 12819.7818 11464.5503 13060.87 11115.9877 05/31/2024 12978.6326 11654.5813 13354.6483 11304.4398 06/30/2024 13083.1249 11761.1264 13510.1462 11411.4668 07/31/2024 13319.208 12028.0752 13810.2039 11678.0004 08/31/2024 13475.067 12205.1518 14041.9705 11845.8158 09/30/2024 13620.8272 12372.5481 14243.8138 12004.424 Effective September 30, 2024, the Fund adopted the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Bloomberg U.S. Universal Total Return Index Value Unhedged as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Strategic Income Fund Class R3 10.52% 3.15% 3.14% Bloomberg U.S. Universal Total Return Index Value Unhedged 12.08% 0.70% 2.15% Strategic Income Fund’s Blended Index 15.53% 2.95% 3.60%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fsi/TSIRX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 9,454,200,000
Holdings Count | Holdings	1,154
Advisory Fees Paid, Amount	$ 41,200,000
Investment Company, Portfolio Turnover	60.47%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $9,454.2 Number of Holdings 1,154 Annual Portfolio Turnover 60.47% Total Advisory Fee $41.2
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Fixed Income Credit Quality (%) U.S. Government 26.5 AAA 10.7 AA 2.4 A 11.8 BBB 22.1 BB 12.2 B 4.1 CCC 0.1 D 0.0 NR 4.2 Cash Equivalents & Other 5.9 Fixed Income Credit Quality (%) U.S. Government 26.5% AAA 10.7% AA 2.4% A 11.8% BBB 22.1% BB 12.2% B 4.1% CCC 0.1% D 0.0% NR 4.2% Cash Equivalents & Other 5.9% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Strategic Income Fund - Class R4
Shareholder Report [Line Items]
Class Name	CLASS: R4
Trading Symbol	TSRIX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Strategic Income Fund Class R4 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R4 $132.00 1.25%
Expenses Paid, Amount	$ 132
Expense Ratio, Percent	1.25%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R4 shares underperformed the Bloomberg U.S. Universal Total Return Index Value Unhedged (the “Index”) during the 12-month period ended September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. The Fund’s structural short duration versus the Index was a relative detractor in this environment. However, this was offset by positive relative returns from the Fund’s allocation to corporates and collateralized mortgage obligations. The Fund’s exposure to asset-backed securities was a modest detractor, while exposure to mortgage-passthrough securities proved to be neither a material contributor nor a detractor to the Fund’s performance.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Strategic Income Fund Bloomberg U.S. Universal Total Return Index Value Unhedged Thornburg Strategic Income Fund’s Blended Index Bloomberg U.S. Aggregate Total Return Value Index USD 09/30/2014 9999.9992 10000 10000 10000 10/31/2014 10028.2568 10097.9156 10091.5595 10098.2769 11/30/2014 9982.9265 10152.4007 10189.2764 10169.91 12/31/2014 9846.5141 10134.0706 10164.0428 10179.4256 01/31/2015 9827.2366 10326.9713 10297.7135 10392.8789 02/28/2015 9927.9331 10266.7871 10340.9202 10295.1602 03/31/2015 9910.8945 10309.1667 10346.9614 10342.967 04/30/2015 10029.1976 10297.2026 10365.7936 10305.856 05/31/2015 10037.3501 10279.1756 10352.9634 10281.0356 06/30/2015 9958.3576 10164.4658 10214.5069 10168.9318 07/31/2015 9924.1213 10223.6598 10307.9799 10239.6187 08/31/2015 9803.9155 10193.5273 10159.713 10224.9146 09/30/2015 9692.9283 10233.421 10139.7461 10294.0811 10/31/2015 9800.9746 10266.1404 10301.7941 10295.7875 11/30/2015 9742.3273 10228.692 10269.7724 10268.5908 12/31/2015 9607.37 10177.6021 10207.116 10235.4031 01/31/2016 9538.6381 10289.9473 10197.36 10376.2558 02/29/2016 9530.9508 10363.0455 10240.0546 10449.8664 03/31/2016 9795.8055 10490.0427 10454.1897 10545.7404 04/30/2016 9988.8348 10561.5241 10519.3782 10586.2218 05/31/2016 10013.1432 10569.7697 10533.354 10588.9383 06/30/2016 10090.7176 10755.8396 10661.1569 10779.1979 07/31/2016 10237.4392 10844.4789 10805.1599 10847.3436 08/31/2016 10321.9347 10856.1803 10797.0727 10834.9414 09/30/2016 10350.6853 10858.7671 10803.4833 10828.5941 10/31/2016 10372.5221 10786.7199 10695.5582 10745.7655 11/30/2016 10283.885 10544.2651 10523.9235 10491.5864 12/31/2016 10347.848 10575.59 10586.1638 10506.3861 01/31/2017 10447.9855 10612.897 10653.881 10527.0016 02/28/2017 10537.4941 10694.7863 10770.279 10597.7522 03/31/2017 10568.119 10691.2092 10788.7073 10592.197 04/30/2017 10660.7254 10779.9092 10887.2607 10673.9358 05/31/2017 10743.8325 10863.0718 11000.3642 10756.0945 06/30/2017 10772.3983 10853.8764 10999.9736 10745.2712 07/31/2017 10837.6355 10907.9371 11090.4925 10791.5097 08/31/2017 10884.6529 11002.0533 11173.1962 10888.3034 09/30/2017 10904.2573 10963.3317 11180.7795 10836.4459 10/31/2017 10930.7105 10976.4881 11228.2216 10842.724 11/30/2017 10936.4878 10959.8758 11265.3495 10828.8068 12/31/2017 10958.4712 11008.197 11337.1814 10878.506 01/31/2018 10961.9261 10902.2582 11352.4461 10753.2186 02/28/2018 10929.3219 10798.886 11172.294 10651.2843 03/31/2018 10915.7776 10853.351 11180.908 10719.5896 04/30/2018 10910.2367 10780.9399 11140.0801 10639.8655 05/31/2018 10926.3865 10839.7297 11217.6448 10715.7993 06/30/2018 10923.8258 10824.0066 11205.5381 10702.6209 07/31/2018 10969.1369 10846.6616 11277.6641 10705.1619 08/31/2018 11014.4343 10900.0958 11363.6265 10774.0467 09/30/2018 11022.4372 10853.3914 11317.7408 10704.6676 10/31/2018 10963.854 10762.5896 11079.9828 10620.0741 11/30/2018 10962.1931 10810.9916 11158.0714 10683.4727 12/31/2018 10974.8229 10980.1461 11152.3723 10879.7393 01/31/2019 11149.8047 11131.5363 11420.6629 10995.2773 02/28/2019 11210.3887 11143.6621 11484.0545 10988.9087 03/31/2019 11309.3651 11344.9094 11690.6344 11199.9166 04/30/2019 11370.232 11360.7739 11775.9355 11202.782 05/31/2019 11412.3462 11534.8191 11807.2714 11401.6482 06/30/2019 11532.0018 11697.9511 12081.5035 11544.8346 07/31/2019 11563.8608 11732.7723 12114.7278 11570.2238 08/31/2019 11651.5657 11998.266 12316.2999 11870.0302 09/30/2019 11651.6113 11946.2869 12316.245 11806.8123 10/31/2019 11681.2185 11984.8873 12408.6071 11842.3764 11/30/2019 11700.2118 11982.4823 12472.666 11836.3427 12/31/2019 11758.4482 12000.3476 12540.447 11828.0976 01/31/2020 11845.7162 12215.7215 12718.2487 12055.7234 02/29/2020 11872.767 12398.6185 12686.372 12272.7065 03/31/2020 11086.6565 12156.4467 12290.8562 12200.4833 04/30/2020 11392.3524 12399.9523 12734.1838 12417.3601 05/31/2020 11718.3984 12515.7534 12904.6506 12475.1769 06/30/2020 11957.5882 12620.1967 13037.9479 12553.758 07/31/2020 12186.6201 12841.8759 13318.4978 12741.2746 08/31/2020 12277.7533 12767.8279 13410.469 12638.4313 09/30/2020 12326.6684 12744.8092 13312.0547 12631.4992 10/31/2020 12363.2795 12699.2567 13182.8319 12575.0965 11/30/2020 12543.9292 12864.9755 13623.4342 12698.4914 12/31/2020 12647.3357 12909.4165 13753.9673 12715.9864 01/31/2021 12689.986 12828.2749 13647.7392 12624.817 02/28/2021 12710.7316 12662.7379 13560.0148 12442.5048 03/31/2021 12679.3212 12515.3896 13514.7933 12287.1394 04/30/2021 12749.1546 12620.6211 13726.0044 12384.2096 05/31/2021 12804.7454 12668.7604 13801.4253 12424.6696 06/30/2021 12846.5839 12761.1183 13920.1403 12511.9637 07/31/2021 12908.8139 12889.2473 14094.5228 12651.8595 08/31/2021 12950.4192 12880.6582 14143.214 12627.7727 09/30/2021 12940.1532 12770.6573 13927.8078 12518.4439 10/31/2021 12918.9928 12760.2291 14082.5127 12514.9938 11/30/2021 12885.628 12775.6288 14054.1256 12552.0197 12/31/2021 12925.2766 12767.0195 14145.4901 12519.9004 01/31/2022 12785.7191 12487.1164 13752.0001 12250.172 02/28/2022 12645.451 12316.8706 13559.6996 12113.503 03/31/2022 12482.9342 11986.4232 13332.7546 11776.9683 04/30/2022 12257.1994 11539.3461 12706.4755 11330.0576 05/31/2022 12265.3595 11602.8447 12773.942 11403.1101 06/30/2022 11985.6872 11371 12392.3213 11224.2161 07/31/2022 12186.9459 11656.8852 12831.3419 11498.4738 08/31/2022 12099.9847 11353.842 12433.995 11173.5652 09/30/2022 11820.6357 10864.6885 11773.0422 10690.7981 10/31/2022 11811.4608 10745.472 11820.1424 10552.327 11/30/2022 12029.3808 11146.1276 12332.2684 10940.3949 12/31/2022 12045.766 11108.275 12183.0234 10891.0465 01/31/2023 12312.2643 11452.8489 12655.2662 11226.0979 02/28/2023 12187.316 11171.4301 12332.6595 10935.8444 03/31/2023 12356.7127 11433.5083 12659.4992 11213.6426 04/30/2023 12427.8852 11503.3528 12765.2599 11281.6023 05/31/2023 12389.9543 11384.0958 12628.574 11158.7602 06/30/2023 12408.0096 11366.4124 12745.2937 11118.9646 07/31/2023 12483.3242 11377.7096 12823.8162 11111.2139 08/31/2023 12469.177 11309.1788 12697.0243 11040.24 09/30/2023 12322.0287 11039.5219 12329.3555 10759.6881 10/31/2023 12231.1579 10873.4999 12102.1509 10589.8898 11/30/2023 12589.1262 11362.8555 12767.5212 11069.4673 12/31/2023 12892.6818 11794.0277 13283.8655 11493.195 01/31/2024 12937.119 11765.7948 13286.5653 11461.6339 02/29/2024 12867.5699 11624.7317 13249.0534 11299.6979 03/31/2024 12979.1635 11738.8554 13432.0791 11404.0404 04/30/2024 12817.0539 11464.5503 13060.87 11115.9877 05/31/2024 12975.8578 11654.5813 13354.6483 11304.4398 06/30/2024 13080.3264 11761.1264 13510.1462 11411.4668 07/31/2024 13316.3585 12028.0752 13810.2039 11678.0004 08/31/2024 13460.5958 12205.1518 14041.9705 11845.8158 09/30/2024 13617.9122 12372.5481 14243.8138 12004.424 Effective September 30, 2024, the Fund adopted the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Bloomberg U.S. Universal Total Return Index Value Unhedged as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Strategic Income Fund Class R4 10.52% 3.17% 3.14% Bloomberg U.S. Universal Total Return Index Value Unhedged 12.08% 0.70% 2.15% Strategic Income Fund’s Blended Index 15.53% 2.95% 3.60%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fsi/TSRIX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 9,454,200,000
Holdings Count | Holdings	1,154
Advisory Fees Paid, Amount	$ 41,200,000
Investment Company, Portfolio Turnover	60.47%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $9,454.2 Number of Holdings 1,154 Annual Portfolio Turnover 60.47% Total Advisory Fee $41.2
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Fixed Income Credit Quality (%) U.S. Government 26.5 AAA 10.7 AA 2.4 A 11.8 BBB 22.1 BB 12.2 B 4.1 CCC 0.1 D 0.0 NR 4.2 Cash Equivalents & Other 5.9 Fixed Income Credit Quality (%) U.S. Government 26.5% AAA 10.7% AA 2.4% A 11.8% BBB 22.1% BB 12.2% B 4.1% CCC 0.1% D 0.0% NR 4.2% Cash Equivalents & Other 5.9% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Strategic Income Fund - Class R5
Shareholder Report [Line Items]
Class Name	CLASS: R5
Trading Symbol	TSRRX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Strategic Income Fund Class R5 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R5 $63.00 0.60%
Expenses Paid, Amount	$ 63
Expense Ratio, Percent	0.60%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R5 shares underperformed the Bloomberg U.S. Universal Total Return Index Value Unhedged (the “Index”) during the 12-month period ended September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. The Fund’s structural short duration versus the Index was a relative detractor in this environment. However, this was offset by positive relative returns from the Fund’s allocation to corporates and collateralized mortgage obligations. The Fund’s exposure to asset-backed securities was a modest detractor, while exposure to mortgage-passthrough securities proved to be neither a material contributor nor a detractor to the Fund’s performance.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Strategic Income Fund Bloomberg U.S. Universal Total Return Index Value Unhedged Thornburg Strategic Income Fund’s Blended Index Bloomberg U.S. Aggregate Total Return Value Index USD 09/30/2014 9999.9968 10000 10000 10000 10/31/2014 10030.4568 10097.9156 10091.5595 10098.2769 11/30/2014 9995.3253 10152.4007 10189.2764 10169.91 12/31/2014 9860.6103 10134.0706 10164.0428 10179.4256 01/31/2015 9834.9533 10326.9713 10297.7135 10392.8789 02/28/2015 9937.8906 10266.7871 10340.9202 10295.1602 03/31/2015 9922.896 10309.1667 10346.9614 10342.967 04/30/2015 10052.2156 10297.2026 10365.7936 10305.856 05/31/2015 10062.5472 10279.1756 10352.9634 10281.0356 06/30/2015 9985.2984 10164.4658 10214.5069 10168.9318 07/31/2015 9953.0423 10223.6598 10307.9799 10239.6187 08/31/2015 9834.3861 10193.5273 10159.713 10224.9146 09/30/2015 9724.8821 10233.421 10139.7461 10294.0811 10/31/2015 9835.5996 10266.1404 10301.7941 10295.7875 11/30/2015 9778.5196 10228.692 10269.7724 10268.5908 12/31/2015 9644.9119 10177.6021 10207.116 10235.4031 01/31/2016 9577.8179 10289.9473 10197.36 10376.2558 02/29/2016 9571.9779 10363.0455 10240.0546 10449.8664 03/31/2016 9840.5247 10490.0427 10454.1897 10545.7404 04/30/2016 10036.8262 10561.5241 10519.3782 10586.2218 05/31/2016 10063.4561 10569.7697 10533.354 10588.9383 06/30/2016 10143.6596 10755.8396 10661.1569 10779.1979 07/31/2016 10293.6241 10844.4789 10805.1599 10847.3436 08/31/2016 10380.9548 10856.1803 10797.0727 10834.9414 09/30/2016 10412.0919 10858.7671 10803.4833 10828.5941 10/31/2016 10436.349 10786.7199 10695.5582 10745.7655 11/30/2016 10349.1809 10544.2651 10523.9235 10491.5864 12/31/2016 10415.9185 10575.59 10586.1638 10506.3861 01/31/2017 10510.0726 10612.897 10653.881 10527.0016 02/28/2017 10613.3013 10694.7863 10770.279 10597.7522 03/31/2017 10649.149 10691.2092 10788.7073 10592.197 04/30/2017 10746.8625 10779.9092 10887.2607 10673.9358 05/31/2017 10835.8382 10863.0718 11000.3642 10756.0945 06/30/2017 10869.6313 10853.8764 10999.9736 10745.2712 07/31/2017 10940.6838 10907.9371 11090.4925 10791.5097 08/31/2017 10993.3857 11002.0533 11173.1962 10888.3034 09/30/2017 11020.315 10963.3317 11180.7795 10836.4459 10/31/2017 11052.293 10976.4881 11228.2216 10842.724 11/30/2017 11063.293 10959.8758 11265.3495 10828.8068 12/31/2017 11090.7758 11008.197 11337.1814 10878.506 01/31/2018 11099.4761 10902.2582 11352.4461 10753.2186 02/28/2018 11079.4165 10798.886 11172.294 10651.2843 03/31/2018 11069.6252 10853.351 11180.908 10719.5896 04/30/2018 11069.058 10780.9399 11140.0801 10639.8655 05/31/2018 11090.6704 10839.7297 11217.6448 10715.7993 06/30/2018 11093.1032 10824.0066 11205.5381 10702.6209 07/31/2018 11144.405 10846.6616 11277.6641 10705.1619 08/31/2018 11195.7012 10900.0958 11363.6265 10774.0467 09/30/2018 11208.9541 10853.3914 11317.7408 10704.6676 10/31/2018 11154.6063 10762.5896 11079.9828 10620.0741 11/30/2018 11158.0015 10810.9916 11158.0714 10683.4727 12/31/2018 11176.1014 10980.1461 11152.3723 10879.7393 01/31/2019 11359.5444 11131.5363 11420.6629 10995.2773 02/28/2019 11426.6368 11143.6621 11484.0545 10988.9087 03/31/2019 11534.1207 11344.9094 11690.6344 11199.9166 04/30/2019 11601.9456 11360.7739 11775.9355 11202.782 05/31/2019 11650.9111 11534.8191 11807.2714 11401.6482 06/30/2019 11779.3994 11697.9511 12081.5035 11544.8346 07/31/2019 11818.324 11732.7723 12114.7278 11570.2238 08/31/2019 11914.4095 11998.266 12316.2999 11870.0302 09/30/2019 11920.6881 11946.2869 12316.245 11806.8123 10/31/2019 11967.9966 11984.8873 12408.6071 11842.3764 11/30/2019 11983.7362 11982.4823 12472.666 11836.3427 12/31/2019 12060.3818 12000.3476 12540.447 11828.0976 01/31/2020 12146.4019 12215.7215 12718.2487 12055.7234 02/29/2020 12180.4087 12398.6185 12686.372 12272.7065 03/31/2020 11389.8625 12156.4467 12290.8562 12200.4833 04/30/2020 11699.8966 12399.9523 12734.1838 12417.3601 05/31/2020 12051.7792 12515.7534 12904.6506 12475.1769 06/30/2020 12303.8275 12620.1967 13037.9479 12553.758 07/31/2020 12546.2966 12841.8759 13318.4978 12741.2746 08/31/2020 12646.9959 12767.8279 13410.469 12638.4313 09/30/2020 12693.748 12744.8092 13312.0547 12631.4992 10/31/2020 12748.8694 12699.2567 13182.8319 12575.0965 11/30/2020 12941.9706 12864.9755 13623.4342 12698.4914 12/31/2020 13055.5687 12909.4165 13753.9673 12715.9864 01/31/2021 13106.9502 12828.2749 13647.7392 12624.817 02/28/2021 13124.5164 12662.7379 13560.0148 12442.5048 03/31/2021 13099.24 12515.3896 13514.7933 12287.1394 04/30/2021 13189.0717 12620.6211 13726.0044 12384.2096 05/31/2021 13253.7061 12668.7604 13801.4253 12424.6696 06/30/2021 13293.3593 12761.1183 13920.1403 12511.9637 07/31/2021 13375.9053 12889.2473 14094.5228 12651.8595 08/31/2021 13415.7114 12880.6582 14143.214 12627.7727 09/30/2021 13422.9791 12770.6573 13927.8078 12518.4439 10/31/2021 13408.3602 12760.2291 14082.5127 12514.9938 11/30/2021 13369.9846 12775.6288 14054.1256 12552.0197 12/31/2021 13418.3682 12767.0195 14145.4901 12519.9004 01/31/2022 13280.7078 12487.1164 13752.0001 12250.172 02/28/2022 13141.4796 12316.8706 13559.6996 12113.503 03/31/2022 12979.1323 11986.4232 13332.7546 11776.9683 04/30/2022 12762.144 11539.3461 12706.4755 11330.0576 05/31/2022 12766.5735 11602.8447 12773.942 11403.1101 06/30/2022 12481.9296 11371 12392.3213 11224.2161 07/31/2022 12698.5715 11656.8852 12831.3419 11498.4738 08/31/2022 12614.85 11353.842 12433.995 11173.5652 09/30/2022 12330.0548 10864.6885 11773.0422 10690.7981 10/31/2022 12327.2276 10745.472 11820.1424 10552.327 11/30/2022 12561.4212 11146.1276 12332.2684 10940.3949 12/31/2022 12585.483 11108.275 12183.0234 10891.0465 01/31/2023 12871.1117 11452.8489 12655.2662 11226.0979 02/28/2023 12746.7772 11171.4301 12332.6595 10935.8444 03/31/2023 12931.1213 11433.5083 12659.4992 11213.6426 04/30/2023 13012.5516 11503.3528 12765.2599 11281.6023 05/31/2023 12979.9581 11384.0958 12628.574 11158.7602 06/30/2023 13005.8013 11366.4124 12745.2937 11118.9646 07/31/2023 13089.6447 11377.7096 12823.8162 11111.2139 08/31/2023 13093.6135 11309.1788 12697.0243 11040.24 09/30/2023 12934.339 11039.5219 12329.3555 10759.6881 10/31/2023 12845.9398 10873.4999 12102.1509 10589.8898 11/30/2023 13229.131 11362.8555 12767.5212 11069.4673 12/31/2023 13555.6832 11794.0277 13283.8655 11493.195 01/31/2024 13609.8654 11765.7948 13286.5653 11461.6339 02/29/2024 13555.5139 11624.7317 13249.0534 11299.6979 03/31/2024 13668.5213 11738.8554 13432.0791 11404.0404 04/30/2024 13504.8874 11464.5503 13060.87 11115.9877 05/31/2024 13679.7965 11654.5813 13354.6483 11304.4398 06/30/2024 13797.3028 11761.1264 13510.1462 11411.4668 07/31/2024 14054.08 12028.0752 13810.2039 11678.0004 08/31/2024 14214.1413 12205.1518 14041.9705 11845.8158 09/30/2024 14387.9947 12372.5481 14243.8138 12004.424 Effective September 30, 2024, the Fund adopted the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Bloomberg U.S. Universal Total Return Index Value Unhedged as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Strategic Income Fund Class R5 11.24% 3.83% 3.71% Bloomberg U.S. Universal Total Return Index Value Unhedged 12.08% 0.70% 2.15% Strategic Income Fund’s Blended Index 15.53% 2.95% 3.60%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fsi/TSRRX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 9,454,200,000
Holdings Count | Holdings	1,154
Advisory Fees Paid, Amount	$ 41,200,000
Investment Company, Portfolio Turnover	60.47%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $9,454.2 Number of Holdings 1,154 Annual Portfolio Turnover 60.47% Total Advisory Fee $41.2
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Fixed Income Credit Quality (%) U.S. Government 26.5 AAA 10.7 AA 2.4 A 11.8 BBB 22.1 BB 12.2 B 4.1 CCC 0.1 D 0.0 NR 4.2 Cash Equivalents & Other 5.9 Fixed Income Credit Quality (%) U.S. Government 26.5% AAA 10.7% AA 2.4% A 11.8% BBB 22.1% BB 12.2% B 4.1% CCC 0.1% D 0.0% NR 4.2% Cash Equivalents & Other 5.9% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Strategic Income Fund - Class R6
Shareholder Report [Line Items]
Class Name	CLASS: R6
Trading Symbol	TSRSX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Strategic Income Fund Class R6 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R6 $56.00 0.53%
Expenses Paid, Amount	$ 56
Expense Ratio, Percent	0.53%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class R6 shares underperformed the Bloomberg U.S. Universal Total Return Index Value Unhedged (the “Index”) during the 12-month period ended September 30, 2024. Treasury yields fell meaningfully over the 12-month period ended September 30, 2024, as U.S. inflation continued to improve, and the market priced in anticipated interest rate cuts by the Federal Reserve. The Fund’s structural short duration versus the Index was a relative detractor in this environment. However, this was offset by positive relative returns from the Fund’s allocation to corporates and collateralized mortgage obligations. The Fund’s exposure to asset-backed securities was a modest detractor, while exposure to mortgage-passthrough securities proved to be neither a material contributor nor a detractor to the Fund’s performance.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Strategic Income Fund Bloomberg U.S. Universal Total Return Index Value Unhedged Thornburg Strategic Income Fund’s Blended Index Bloomberg U.S. Aggregate Total Return Value Index USD 04/10/2017 9999.9973 10000 10000 10000 04/30/2017 10059.5867 10056.6933 10078.1265 10052.775 05/31/2017 10174.3639 10134.2765 10182.8242 10130.1526 06/30/2017 10210.3613 10125.6981 10182.4626 10119.9591 07/31/2017 10273.6056 10176.1319 10266.2542 10163.5068 08/31/2017 10363.0857 10263.9339 10342.8114 10254.6677 09/30/2017 10399.086 10227.8101 10349.8311 10205.8279 10/31/2017 10436.8356 10240.0839 10393.7473 10211.7408 11/30/2017 10436.3077 10224.5861 10428.1159 10198.6334 12/31/2017 10461.5629 10269.6654 10494.6093 10245.4405 01/31/2018 10470.1518 10170.834 10508.7396 10127.444 02/28/2018 10450.779 10074.397 10341.9763 10031.4417 03/31/2018 10438.1316 10125.2079 10349.95 10095.772 04/30/2018 10437.8697 10057.6548 10312.1564 10020.6874 05/31/2018 10458.6469 10112.5004 10383.9566 10092.2023 06/30/2018 10461.3594 10097.8322 10372.7496 10079.7908 07/31/2018 10510.0592 10118.9673 10439.5153 10082.184 08/31/2018 10567.7954 10168.8166 10519.089 10147.06 09/30/2018 10571.6644 10125.2456 10476.6135 10081.7184 10/31/2018 10520.9872 10040.5356 10256.5255 10002.0477 11/30/2018 10524.6186 10085.6904 10328.8107 10061.7569 12/31/2018 10542.1126 10243.4964 10323.5351 10246.602 01/31/2019 10715.1319 10384.73 10571.8865 10355.4163 02/28/2019 10778.8697 10396.0422 10630.5669 10349.4183 03/31/2019 10880.7989 10583.788 10821.7939 10548.1468 04/30/2019 10945.2937 10598.5882 10900.7554 10550.8454 05/31/2019 10992.0776 10760.9569 10929.7626 10738.1388 06/30/2019 11113.7495 10913.1445 11183.6138 10872.9926 07/31/2019 11151.1078 10945.6295 11214.3689 10896.9043 08/31/2019 11242.2971 11193.3114 11400.9604 11179.2637 09/30/2019 11248.2603 11144.8196 11400.9095 11119.7248 10/31/2019 11293.4391 11180.8302 11486.4073 11153.2192 11/30/2019 11308.9976 11178.5866 11545.7054 11147.5366 12/31/2019 11381.646 11195.2534 11608.449 11139.7713 01/31/2020 11463.384 11396.178 11773.0366 11354.1506 02/29/2020 11496.12 11566.8046 11743.5289 11558.5066 03/31/2020 10752.5829 11340.8799 11377.4076 11490.4864 04/30/2020 11045.1938 11568.0489 11787.7874 11694.7422 05/31/2020 11377.2586 11676.081 11945.5852 11749.1944 06/30/2020 11615.3048 11773.5172 12068.9759 11823.2026 07/31/2020 11844.4166 11980.3242 12328.6755 11999.8067 08/31/2020 11940.0588 11911.244 12413.8115 11902.9483 09/30/2020 11984.8694 11889.7696 12322.7113 11896.4197 10/31/2020 12037.6707 11847.2732 12203.0922 11843.2992 11/30/2020 12220.3685 12001.8741 12610.9493 11959.5133 12/31/2020 12328.1892 12043.3335 12731.7813 11975.9902 01/31/2021 12377.4414 11967.6356 12633.4479 11890.1263 02/28/2021 12394.7874 11813.2044 12552.2432 11718.4236 03/31/2021 12371.8348 11675.7416 12510.3825 11572.0996 04/30/2021 12457.3025 11773.9132 12705.8965 11663.5208 05/31/2021 12519.0219 11818.8228 12775.7122 11701.6264 06/30/2021 12557.2074 11904.9846 12885.6044 11783.8404 07/31/2021 12635.8411 12024.5174 13047.0269 11915.5951 08/31/2021 12674.0253 12016.5046 13092.0993 11892.91 09/30/2021 12681.6894 11913.8835 12892.702 11789.9435 10/31/2021 12668.7974 11904.155 13035.9093 11786.6942 11/30/2021 12633.4374 11918.5216 13009.6319 11821.5654 12/31/2021 12679.8736 11910.4899 13094.2063 11791.3153 01/31/2022 12550.9508 11649.3652 12729.9602 11537.2834 02/28/2022 12420.46 11490.5411 12551.9514 11408.5678 03/31/2022 12268.4459 11182.2631 12341.8727 11091.6175 04/30/2022 12054.2339 10765.1801 11762.1383 10670.7144 05/31/2022 12069.6538 10824.4186 11824.5908 10739.5156 06/30/2022 11802.0337 10608.1282 11471.3319 10571.0322 07/31/2022 12007.133 10874.8336 11877.7248 10829.3297 08/31/2022 11928.9948 10592.1214 11509.9084 10523.3289 09/30/2022 11661.1813 10135.7848 10898.0772 10068.656 10/31/2022 11659.3191 10024.5665 10941.677 9938.2431 11/30/2022 11880.9638 10398.3424 11415.7421 10303.7277 12/31/2022 11904.4836 10363.0293 11277.5889 10257.2511 01/31/2023 12174.7513 10684.486 11714.7349 10572.8045 02/28/2023 12058.2349 10421.9473 11416.1041 10299.4421 03/31/2023 12232.9908 10666.4429 11718.6533 10561.074 04/30/2023 12310.6749 10731.6016 11816.5539 10625.0789 05/31/2023 12280.7678 10620.3455 11690.0264 10509.3854 06/30/2023 12305.9838 10603.8484 11798.0716 10471.9057 07/31/2023 12385.7325 10614.3877 11870.7584 10464.6061 08/31/2023 12390.3457 10550.4546 11753.3896 10397.7624 09/30/2023 12240.8734 10298.8888 11413.0457 10133.5371 10/31/2023 12158.3004 10144.0051 11202.7268 9973.62 11/30/2023 12520.8267 10600.5302 11818.6472 10425.2889 12/31/2023 12829.9475 11002.7753 12296.6171 10824.3581 01/31/2024 12881.9884 10976.4366 12299.1162 10794.6337 02/29/2024 12831.5309 10844.8373 12264.3922 10642.1215 03/31/2024 12939.1169 10951.3045 12433.8155 10740.3918 04/30/2024 12785.4944 10695.4023 12090.1944 10469.102 05/31/2024 12951.5741 10872.6843 12362.1394 10646.5874 06/30/2024 13063.4187 10972.0813 12506.0807 10747.386 07/31/2024 13306.8376 11221.1207 12783.8383 10998.4089 08/31/2024 13470.5 11386.3174 12998.3802 11156.4585 09/30/2024 13624.0426 11542.4832 13185.2227 11305.8365 Effective September 30, 2024, the Fund adopted the Bloomberg U.S. Aggregate Total Return Index Value USD as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the Bloomberg U.S. Universal Total Return Index Value Unhedged as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year Strategic Income Fund Class R6 11.30% 3.91% Bloomberg U.S. Universal Total Return Index Value Unhedged 12.08% 0.70% Strategic Income Fund’s Blended Index 15.53% 2.95%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fsi/TSRSX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 9,454,200,000
Holdings Count | Holdings	1,154
Advisory Fees Paid, Amount	$ 41,200,000
Investment Company, Portfolio Turnover	60.47%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $9,454.2 Number of Holdings 1,154 Annual Portfolio Turnover 60.47% Total Advisory Fee $41.2
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Fixed Income Credit Quality (%) U.S. Government 26.5 AAA 10.7 AA 2.4 A 11.8 BBB 22.1 BB 12.2 B 4.1 CCC 0.1 D 0.0 NR 4.2 Cash Equivalents & Other 5.9 Fixed Income Credit Quality (%) U.S. Government 26.5% AAA 10.7% AA 2.4% A 11.8% BBB 22.1% BB 12.2% B 4.1% CCC 0.1% D 0.0% NR 4.2% Cash Equivalents & Other 5.9% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Short Duration Municipal Fund Class A
Shareholder Report [Line Items]
Class Name	CLASS: A
Trading Symbol	TLMAX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Short Duration Municipal Fund Class A Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $72.00 0.70%
Expenses Paid, Amount	$ 72
Expense Ratio, Percent	0.70%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class A shares underperformed the ICE BofA 1-3 Year U.S. Municipal Securities Index (the “Index”) during the 12-month period ended September 30, 2024. The period began with municipal bond yields peaking in October of 2023, which marked the end of the Federal Reserve rate hiking cycle, before falling precipitously throughout the period and ending significantly lower. The backdrop of falling municipal bond yields boosted bond prices due to the inverse relationship between the two, which produced strong absolute returns for the asset class. However, the Fund’s relative underperformance during the period was driven by its shorter duration and yield curve positioning versus its Index. The Fund’s relative performance benefited from active management with respect to its sector/quality returns thanks to its higher weighting to revenue and A-rated bonds. Specifically, within the revenue sector, multi-family housing bonds were a large contributor to relative performance during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Short Duration Municipal Fund ICE BofA 1-3 Year U.S. Municipal Securities Index ICE BofA U.S. Municipal Securities Index 09/30/2014 9848.3689 10000 10000 10/31/2014 9857.6712 10005.9501 10061.0061 11/30/2014 9859.2767 10011.4622 10074.732 12/31/2014 9843.6308 10001.1681 10133.237 01/31/2015 9867.5813 10031.4662 10315.1349 02/28/2015 9852.9841 10032.8168 10213.0312 03/31/2015 9845.1351 10026.9762 10243.2441 04/30/2015 9838.7027 10028.0348 10191.582 05/31/2015 9823.5426 10020.1135 10157.4674 06/30/2015 9833.5604 10028.3269 10143.7215 07/31/2015 9850.6343 10050.9591 10223.9759 08/31/2015 9852.1139 10065.1226 10246.5455 09/30/2015 9870.3794 10085.2361 10315.6951 10/31/2015 9879.4469 10099.0345 10359.774 11/30/2015 9864.9168 10078.7749 10410.5357 12/31/2015 9857.5144 10076.9132 10493.2511 01/31/2016 9882.5245 10123.5649 10609.5409 02/29/2016 9901.0783 10147.4749 10618.4247 03/31/2016 9886.5539 10127.8359 10665.2047 04/30/2016 9889.718 10146.3432 10746.9397 05/31/2016 9884.2237 10140.1376 10780.454 06/30/2016 9911.5023 10175.7652 10955.589 07/31/2016 9921.4412 10196.0613 10949.7465 08/31/2016 9906.9598 10189.7826 10974.9373 09/30/2016 9885.4753 10157.2943 10921.9146 10/31/2016 9887.1288 10158.2434 10819.6708 11/30/2016 9849.3535 10094.9096 10425.262 12/31/2016 9858.9789 10110.0221 10539.3308 01/31/2017 9882.0198 10155.4692 10592.9738 02/28/2017 9904.7257 10197.9959 10661.5031 03/31/2017 9901.8531 10192.5204 10685.8535 04/30/2017 9924.3489 10215.1162 10762.9465 05/31/2017 9946.2717 10239.3911 10922.1347 06/30/2017 9929.2453 10226.0673 10897.224 07/31/2017 9952.0866 10256.3653 10976.8981 08/31/2017 9991.0396 10285.6778 11069.4177 09/30/2017 9982.254 10269.3971 11027.4598 10/31/2017 9972.5424 10259.7237 11047.8085 11/30/2017 9947.6854 10195.9882 11000.3481 12/31/2017 9946.7631 10209.8596 11110.0751 01/31/2018 9953.8291 10233.9886 10993.045 02/28/2018 9962.4584 10246.5093 10946.205 03/31/2018 9953.4252 10239.3911 10982.8206 04/30/2018 9953.8487 10222.3439 10940.1224 05/31/2018 9968.3084 10262.2789 11068.6574 06/30/2018 9984.0207 10299.9142 11080.8826 07/31/2018 9990.6135 10325.9413 11107.1138 08/31/2018 9991.2292 10327.292 11124.0611 09/30/2018 9984.2708 10298.7096 11053.4109 10/31/2018 9985.5003 10297.724 10973.8968 11/30/2018 10004.1727 10341.9665 11094.9286 12/31/2018 10030.6801 10389.0562 11225.6846 01/31/2019 10055.7066 10431.0719 11309.9006 02/28/2019 10076.8114 10458.7052 11374.1081 03/31/2019 10104.646 10495.5739 11556.5862 04/30/2019 10108.3559 10498.6037 11604.8669 05/31/2019 10135.5956 10549.3073 11776.3203 06/30/2019 10163.761 10585.227 11826.3817 07/31/2019 10182.1291 10630.455 11920.3619 08/31/2019 10200.1542 10647.6483 12108.5024 09/30/2019 10185.8389 10620.526 12018.0237 10/31/2019 10203.6914 10651.0066 12032.5099 11/30/2019 10213.0184 10668.9299 12055.2997 12/31/2019 10222.667 10687.8023 12094.0362 01/31/2020 10256.3376 10738.0314 12310.4889 02/29/2020 10274.2018 10766.1392 12480.4216 03/31/2020 10170.5294 10675.5371 12011.9411 04/30/2020 10129.9655 10702.8053 11828.8427 05/31/2020 10238.2648 10835.8612 12213.0072 06/30/2020 10263.8627 10846.6298 12331.8981 07/31/2020 10288.2774 10887.2584 12529.0824 08/31/2020 10295.65 10888.463 12486.8844 09/30/2020 10301.9834 10897.2239 12478.7409 10/31/2020 10297.0913 10885.4697 12453.9903 11/30/2020 10301.0218 10904.5611 12644.4318 12/31/2020 10312.0773 10918.177 12730.2285 01/31/2021 10322.3945 10939.4587 12814.1645 02/28/2021 10301.0115 10926.6824 12608.4364 03/31/2021 10310.9468 10938.8016 12685.0892 04/30/2021 10321.5527 10953.0745 12805.5408 05/31/2021 10314.9144 10959.0246 12861.4247 06/30/2021 10308.7179 10957.4915 12903.5827 07/31/2021 10326.7853 10976.0718 13000.3241 08/31/2021 10319.6112 10971.2169 12952.2436 09/30/2021 10296.3268 10955.8853 12854.4017 10/31/2021 10289.4792 10951.8334 12840.0155 11/30/2021 10283.7124 10956.1043 12944.6803 12/31/2021 10286.076 10955.0822 12962.708 01/31/2022 10162.9875 10843.235 12614.479 02/28/2022 10142.548 10818.4855 12543.3886 03/31/2022 10028.9156 10699.666 12161.105 04/30/2022 9976.0983 10628.9219 11801.7111 05/31/2022 10024.887 10722.8093 11990.3119 06/30/2022 10024.4534 10721.4952 11760.3534 07/31/2022 10084.0348 10805.1981 12081.5509 08/31/2022 10002.6373 10692.5478 11774.1193 09/30/2022 9897.2518 10566.026 11336.1319 10/31/2022 9903.0725 10571.8301 11235.8489 11/30/2022 10018.107 10727.2628 11804.6324 12/31/2022 10026.6127 10732.8478 11792.3671 01/31/2023 10110.6799 10839.4386 12154.9223 02/28/2023 10036.768 10723.1014 11859.776 03/31/2023 10141.6808 10851.8498 12125.9499 04/30/2023 10120.233 10814.4336 12111.7038 05/31/2023 10090.4813 10787.5303 12018.8841 06/30/2023 10155.4636 10840.1321 12128.6911 07/31/2023 10178.3088 10858.6395 12159.4442 08/31/2023 10185.2968 10859.5156 12012.0412 09/30/2023 10124.1722 10796.4737 11671.6555 10/31/2023 10140.9197 10815.9302 11525.4929 11/30/2023 10313.1006 11004.8367 12262.5884 12/31/2023 10373.2429 11092.1535 12561.5363 01/31/2024 10373.2185 11091.6425 12533.8245 02/29/2024 10382.3162 11103.0681 12535.4652 03/31/2024 10391.1109 11097.7021 12522.8598 04/30/2024 10391.7083 11081.1294 12382.8399 05/31/2024 10409.3007 11096.972 12356.9688 06/30/2024 10462.6804 11171.695 12555.7339 07/31/2024 10534.2497 11254.6314 12664.2203 08/31/2024 10597.3762 11342.7513 12763.903 09/30/2024 10642.7436 11391.2647 12899.3409 Effective September 30, 2024, the Fund adopted the ICE BofA U.S. Municipal Securities Index as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the ICE BofA 1-3 Year U.S. Municipal Securities Index as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Short Duration Municipal Fund Class A (with sales charge) 2.76% 0.57% 0.62% Short Duration Municipal Fund Class A (without sales charge) 5.12% 0.88% 0.78% ICE BofA 1-3 Year U.S. Municipal Securities Index 5.51% 1.41% 1.31% ICE BofA U.S. Municipal Securities Index 10.52% 1.43% 2.58%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment and assumes the deduction of the maximum sales charge associated with that investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fldm/TLMAX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 117,900,000
Holdings Count | Holdings	136
Advisory Fees Paid, Amount	$ 500,000
Investment Company, Portfolio Turnover	63.53%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $117.9 Number of Holdings 136 Annual Portfolio Turnover 63.53% Total Advisory Fee $0.5
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) AAA 23.7 AA 30.2 A 31.1 BBB 9.2 NR 4.3 Below Invest. Grade 0.0 Cash & Cash Equivalent 1.6 Credit Quality Ratings (%) AAA 23.7% AA 30.2% A 31.1% BBB 9.2% NR 4.3% Below Invest. Grade 0.0% Cash & Cash Equivalent 1.6% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Short Duration Municipal Fund Class I
Shareholder Report [Line Items]
Class Name	CLASS: I
Trading Symbol	TLMIX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Short Duration Municipal Fund Class I Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $51.00 0.50%
Expenses Paid, Amount	$ 51
Expense Ratio, Percent	0.50%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class I shares underperformed the ICE BofA 1-3 Year U.S. Municipal Securities Index (the “Index”) during the 12-month period ended September 30, 2024. The period began with municipal bond yields peaking in October of 2023, which marked the end of the Federal Reserve rate hiking cycle, before falling precipitously throughout the period and ending significantly lower. The backdrop of falling municipal bond yields boosted bond prices due to the inverse relationship between the two, which produced strong absolute returns for the asset class. However, the Fund’s relative underperformance during the period was driven by its shorter duration and yield curve positioning versus its Index. The Fund’s relative performance benefited from active management with respect to its sector/quality returns thanks to its higher weighting to revenue and A-rated bonds. Specifically, within the revenue sector, multi-family housing bonds were a large contributor to relative performance during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Short Duration Municipal Fund ICE BofA 1-3 Year U.S. Municipal Securities Index ICE BofA U.S. Municipal Securities Index 09/30/2014 10000.0028 10000 10000 10/31/2014 10011.1446 10005.9501 10061.0061 11/30/2014 10014.4174 10011.4622 10074.732 12/31/2014 9999.3464 10001.1681 10133.237 01/31/2015 10023.7622 10031.4662 10315.1349 02/28/2015 10010.4671 10032.8168 10213.0312 03/31/2015 10004.0688 10026.9762 10243.2441 04/30/2015 9999.183 10028.0348 10191.582 05/31/2015 9985.4721 10020.1135 10157.4674 06/30/2015 9997.2957 10028.3269 10143.7215 07/31/2015 10016.3495 10050.9591 10223.9759 08/31/2015 10027.6814 10065.1226 10246.5455 09/30/2015 10039.7719 10085.2361 10315.6951 10/31/2015 10050.6947 10099.0345 10359.774 11/30/2015 10029.4316 10078.7749 10410.5357 12/31/2015 10023.6013 10076.9132 10493.2511 01/31/2016 10058.9017 10123.5649 10609.5409 02/29/2016 10071.2458 10147.4749 10618.4247 03/31/2016 10058.1611 10127.8359 10665.2047 04/30/2016 10071.1752 10146.3432 10746.9397 05/31/2016 10067.2754 10140.1376 10780.454 06/30/2016 10096.7195 10175.7652 10955.589 07/31/2016 10108.5426 10196.0613 10949.7465 08/31/2016 10095.491 10189.7826 10974.9373 09/30/2016 10075.684 10157.2943 10921.9146 10/31/2016 10079.0775 10158.2434 10819.6708 11/30/2016 10042.2205 10094.9096 10425.262 12/31/2016 10045.76 10110.0221 10539.3308 01/31/2017 10069.5677 10155.4692 10592.9738 02/28/2017 10102.4495 10197.9959 10661.5031 03/31/2017 10101.2415 10192.5204 10685.8535 04/30/2017 10117.6771 10215.1162 10762.9465 05/31/2017 10141.7632 10239.3911 10922.1347 06/30/2017 10134.2497 10226.0673 10897.224 07/31/2017 10159.2773 10256.3653 10976.8981 08/31/2017 10192.5592 10285.6778 11069.4177 09/30/2017 10185.2601 10269.3971 11027.4598 10/31/2017 10185.3074 10259.7237 11047.8085 11/30/2017 10153.3372 10195.9882 11000.3481 12/31/2017 10153.9944 10209.8596 11110.0751 01/31/2018 10171.2483 10233.9886 10993.045 02/28/2018 10173.4038 10246.5093 10946.205 03/31/2018 10174.1659 10239.3911 10982.8206 04/30/2018 10167.9772 10222.3439 10940.1224 05/31/2018 10192.7852 10262.2789 11068.6574 06/30/2018 10210.5129 10299.9142 11080.8826 07/31/2018 10218.9876 10325.9413 11107.1138 08/31/2018 10221.3472 10327.292 11124.0611 09/30/2018 10215.9038 10298.7096 11053.4109 10/31/2018 10210.4975 10297.724 10973.8968 11/30/2018 10239.634 10341.9665 11094.9286 12/31/2018 10268.4671 10389.0562 11225.6846 01/31/2019 10287.4986 10431.0719 11309.9006 02/28/2019 10310.696 10458.7052 11374.1081 03/31/2019 10340.9491 10495.5739 11556.5862 04/30/2019 10346.4838 10498.6037 11604.8669 05/31/2019 10384.5963 10549.3073 11776.3203 06/30/2019 10406.7616 10585.227 11826.3817 07/31/2019 10435.7705 10630.455 11920.3619 08/31/2019 10456.0077 10647.6483 12108.5024 09/30/2019 10443.0505 10620.526 12018.0237 10/31/2019 10463.1274 10651.0066 12032.5099 11/30/2019 10474.3965 10668.9299 12055.2997 12/31/2019 10486.0366 10687.8023 12094.0362 01/31/2020 10522.3548 10738.0314 12310.4889 02/29/2020 10542.3446 10766.1392 12480.4216 03/31/2020 10437.5859 10675.5371 12011.9411 04/30/2020 10397.6575 10702.8053 11828.8427 05/31/2020 10510.5729 10835.8612 12213.0072 06/30/2020 10530.0428 10846.6298 12331.8981 07/31/2020 10556.8861 10887.2584 12529.0824 08/31/2020 10566.2303 10888.463 12486.8844 09/30/2020 10574.4991 10897.2239 12478.7409 10/31/2020 10571.2666 10885.4697 12453.9903 11/30/2020 10577.034 10904.5611 12644.4318 12/31/2020 10590.2087 10918.177 12730.2285 01/31/2021 10602.6115 10939.4587 12814.1645 02/28/2021 10582.2534 10926.6824 12608.4364 03/31/2021 10594.2499 10938.8016 12685.0892 04/30/2021 10606.8947 10953.0745 12805.5408 05/31/2021 10610.4544 10959.0246 12861.4247 06/30/2021 10597.2465 10957.4915 12903.5827 07/31/2021 10617.6355 10976.0718 13000.3241 08/31/2021 10612.1203 10971.2169 12952.2436 09/30/2021 10598.5228 10955.8853 12854.4017 10/31/2021 10584.6796 10951.8334 12840.0155 11/30/2021 10589.0374 10956.1043 12944.6803 12/31/2021 10584.6543 10955.0822 12962.708 01/31/2022 10459.6798 10843.235 12614.479 02/28/2022 10440.2165 10818.4855 12543.3886 03/31/2022 10333.5096 10699.666 12161.105 04/30/2022 10272.1606 10628.9219 11801.7111 05/31/2022 10332.7793 10722.8093 11990.3119 06/30/2022 10325.3856 10721.4952 11760.3534 07/31/2022 10397.2038 10805.1981 12081.5509 08/31/2022 10306.3401 10692.5478 11774.1193 09/30/2022 10199.401 10566.026 11336.1319 10/31/2022 10207.178 10571.8301 11235.8489 11/30/2022 10336.2178 10727.2628 11804.6324 12/31/2022 10338.0774 10732.8478 11792.3671 01/31/2023 10426.6408 10839.4386 12154.9223 02/28/2023 10351.9243 10723.1014 11859.776 03/31/2023 10461.9539 10851.8498 12125.9499 04/30/2023 10450.2875 10814.4336 12111.7038 05/31/2023 10421.3309 10787.5303 12018.8841 06/30/2023 10481.3168 10840.1321 12128.6911 07/31/2023 10506.683 10858.6395 12159.4442 08/31/2023 10515.6663 10859.5156 12012.0412 09/30/2023 10454.2218 10796.4737 11671.6555 10/31/2023 10482.1985 10815.9302 11525.4929 11/30/2023 10652.9829 11004.8367 12262.5884 12/31/2023 10725.9313 11092.1535 12561.5363 01/31/2024 10727.7065 11091.6425 12533.8245 02/29/2024 10738.8778 11103.0681 12535.4652 03/31/2024 10749.7847 11097.7021 12522.8598 04/30/2024 10743.1389 11081.1294 12382.8399 05/31/2024 10772.2188 11096.972 12356.9688 06/30/2024 10829.214 11171.695 12555.7339 07/31/2024 10905.1176 11254.6314 12664.2203 08/31/2024 10972.3244 11342.7513 12763.903 09/30/2024 11011.9202 11391.2647 12899.3409 Effective September 30, 2024, the Fund adopted the ICE BofA U.S. Municipal Securities Index as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the ICE BofA 1-3 Year U.S. Municipal Securities Index as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Short Duration Municipal Fund Class I 5.34% 1.07% 0.97% ICE BofA 1-3 Year U.S. Municipal Securities Index 5.51% 1.41% 1.31% ICE BofA U.S. Municipal Securities Index 10.52% 1.43% 2.58%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fldm/TLMIX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 117,900,000
Holdings Count | Holdings	136
Advisory Fees Paid, Amount	$ 500,000
Investment Company, Portfolio Turnover	63.53%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $117.9 Number of Holdings 136 Annual Portfolio Turnover 63.53% Total Advisory Fee $0.5
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) AAA 23.7 AA 30.2 A 31.1 BBB 9.2 NR 4.3 Below Invest. Grade 0.0 Cash & Cash Equivalent 1.6 Credit Quality Ratings (%) AAA 23.7% AA 30.2% A 31.1% BBB 9.2% NR 4.3% Below Invest. Grade 0.0% Cash & Cash Equivalent 1.6% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Limited Term Municipal Fund - Class A
Shareholder Report [Line Items]
Class Name	CLASS: A
Trading Symbol	LTMFX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Limited Term Municipal Fund Class A Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $79.00 0.77%
Expenses Paid, Amount	$ 79
Expense Ratio, Percent	0.77%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class A shares underperformed the ICE BofA 1-10 Year U.S. Municipal Securities Index (the “Index”) during the 12-month period ended September 30, 2024. The period began with municipal bond yields peaking in October of 2023, which marked the end of the Federal Reserve rate hiking cycle, before falling precipitously throughout the period and ending significantly lower. The backdrop of falling municipal bond yields boosted bond prices due to the inverse relationship between the two, producing strong absolute returns for the asset class. However, the Fund’s underperformance during the period was driven by its shorter duration and yield curve positioning compared to the Index. The Fund’s relative performance benefited from active management with respect to its sector/quality returns thanks to the Fund’s higher weighting to revenue bonds and A-rated bonds. Specifically, within the revenue sector, hospital and other utility bonds were large contributors to relative performance during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Limited Term Municipal Fund ICE BofA 1-10 Year U.S. Municipal Securities Index ICE BofA U.S. Municipal Securities Index 09/30/2014 9851.3561 10000 10000 10/31/2014 9877.8928 10031.0861 10061.0061 11/30/2014 9877.4834 10036.9203 10074.732 12/31/2014 9869.6579 10037.6328 10133.237 01/31/2015 9976.9339 10163.3576 10315.1349 02/28/2015 9915.7851 10102.8334 10213.0312 03/31/2015 9914.2534 10101.9427 10243.2441 04/30/2015 9899.707 10091.7885 10191.582 05/31/2015 9871.307 10054.6901 10157.4674 06/30/2015 9871.1551 10061.5931 10143.7215 07/31/2015 9911.2559 10113.7892 10223.9759 08/31/2015 9917.0434 10123.0972 10246.5455 09/30/2015 9964.5823 10181.2611 10315.6951 10/31/2015 9991.3355 10221.0316 10359.774 11/30/2015 9997.9041 10219.8737 10410.5357 12/31/2015 10017.4784 10250.3808 10493.2511 01/31/2016 10105.6579 10357.5787 10609.5409 02/29/2016 10119.0041 10380.4701 10618.4247 03/31/2016 10103.94 10364.6599 10665.2047 04/30/2016 10145.1836 10412.4469 10746.9397 05/31/2016 10130.2964 10394.6771 10780.454 06/30/2016 10213.0206 10485.9311 10955.589 07/31/2016 10225.4506 10509.4015 10949.7465 08/31/2016 10224.0343 10512.5636 10974.9373 09/30/2016 10195.7055 10481.3439 10921.9146 10/31/2016 10145.6049 10435.7837 10819.6708 11/30/2016 9893.4221 10188.5204 10425.262 12/31/2016 9948.3689 10245.66 10539.3308 01/31/2017 9996.7343 10316.8283 10592.9738 02/28/2017 10046.8977 10379.8912 10661.5031 03/31/2017 10053.3903 10387.2396 10685.8535 04/30/2017 10116.9627 10452.3956 10762.9465 05/31/2017 10201.0297 10545.3865 10922.1347 06/30/2017 10172.9062 10509.8914 10897.224 07/31/2017 10214.5874 10573.934 10976.8981 08/31/2017 10270.3154 10635.349 11069.4177 09/30/2017 10220.4227 10584.3109 11027.4598 10/31/2017 10219.3558 10581.0598 11047.8085 11/30/2017 10140.8278 10488.0688 11000.3481 12/31/2017 10175.8839 10535.2323 11110.0751 01/31/2018 10132.3434 10494.8828 10993.045 02/28/2018 10119.0735 10474.2182 10946.205 03/31/2018 10111.5286 10475.3761 10982.8206 04/30/2018 10083.5868 10443.1321 10940.1224 05/31/2018 10147.5338 10529.888 11068.6574 06/30/2018 10162.3131 10554.65 11080.8826 07/31/2018 10190.7046 10595.7566 11107.1138 08/31/2018 10190.9223 10601.3236 11124.0611 09/30/2018 10155.2994 10553.8929 11053.4109 10/31/2018 10133.8716 10524.6328 10973.8968 11/30/2018 10192.5843 10616.4213 11094.9286 12/31/2018 10265.3582 10713.0196 11225.6846 01/31/2019 10330.714 10805.1198 11309.9006 02/28/2019 10362.4819 10853.9757 11374.1081 03/31/2019 10421.5807 10937.3469 11556.5862 04/30/2019 10430.5347 10949.2825 11604.8669 05/31/2019 10504.083 11066.0111 11776.3203 06/30/2019 10541.9798 11111.3932 11826.3817 07/31/2019 10608.7979 11194.319 11920.3619 08/31/2019 10653.5682 11268.4267 12108.5024 09/30/2019 10603.518 11192.2704 12018.0237 10/31/2019 10625.6249 11224.8261 12032.5099 11/30/2019 10633.9274 11243.7093 12055.2997 12/31/2019 10656.2434 11278.67 12094.0362 01/31/2020 10751.6128 11411.0752 12310.4889 02/29/2020 10804.0941 11478.9924 12480.4216 03/31/2020 10620.3544 11208.2587 12011.9411 04/30/2020 10576.5391 11168.7109 11828.8427 05/31/2020 10790.9784 11448.9307 12213.0072 06/30/2020 10835.3948 11498.7218 12331.8981 07/31/2020 10915.725 11617.7663 12529.0824 08/31/2020 10906.4123 11604.8954 12486.8844 09/30/2020 10912.2754 11606.3651 12478.7409 10/31/2020 10894.9288 11585.9676 12453.9903 11/30/2020 10945.2054 11664.3953 12644.4318 12/31/2020 10972.1478 11708.3968 12730.2285 01/31/2021 10998.6087 11755.4267 12814.1645 02/28/2021 10914.4672 11644.3096 12608.4364 03/31/2021 10940.657 11679.6266 12685.0892 04/30/2021 10974.8128 11734.3612 12805.5408 05/31/2021 10970.6587 11746.5195 12861.4247 06/30/2021 10974.3514 11755.8721 12903.5827 07/31/2021 11022.4322 11818.8903 13000.3241 08/31/2021 11003.0631 11802.1003 12952.2436 09/30/2021 10954.4261 11744.9162 12854.4017 10/31/2021 10920.3563 11724.6079 12840.0155 11/30/2021 10947.5534 11758.8114 12944.6803 12/31/2021 10951.2521 11765.1355 12962.708 01/31/2022 10735.2341 11516.7143 12614.479 02/28/2022 10710.2519 11477.4782 12543.3886 03/31/2022 10478.4832 11243.0413 12161.105 04/30/2022 10317.6006 11063.3835 11801.7111 05/31/2022 10423.2571 11210.4855 11990.3119 06/30/2022 10369.9446 11159.1802 11760.3534 07/31/2022 10515.0893 11355.0045 12081.5509 08/31/2022 10378.3901 11175.5694 11774.1193 09/30/2022 10165.8718 10912.5404 11336.1319 10/31/2022 10145.4517 10893.5681 11235.8489 11/30/2022 10372.0782 11188.4403 11804.6324 12/31/2022 10391.5568 11222.5102 11792.3671 01/31/2023 10557.1633 11436.9951 12154.9223 02/28/2023 10416.7075 11232.0409 11859.776 03/31/2023 10553.4254 11425.1485 12125.9499 04/30/2023 10528.0383 11387.1594 12111.7038 05/31/2023 10456.128 11297.3305 12018.8841 06/30/2023 10517.406 11365.8713 12128.6911 07/31/2023 10547.5477 11388.0947 12159.4442 08/31/2023 10500.24 11332.8702 12012.0412 09/30/2023 10359.6239 11153.6577 11671.6555 10/31/2023 10337.1177 11126.4908 11525.4929 11/30/2023 10685.592 11522.2813 12262.5884 12/31/2023 10837.5494 11703.5424 12561.5363 01/31/2024 10808.2629 11680.6955 12533.8245 02/29/2024 10827.4642 11690.627 12535.4652 03/31/2024 10822.1193 11680.3837 12522.8598 04/30/2024 10753.3017 11593.6278 12382.8399 05/31/2024 10716.323 11540.6301 12356.9688 06/30/2024 10808.3665 11666.8448 12555.7339 07/31/2024 10908.834 11771.5932 12664.2203 08/31/2024 11017.734 11895.1358 12763.903 09/30/2024 11078.8105 11981.8917 12899.3409 Effective September 30, 2024, the Fund adopted the ICE BofA U.S. Municipal Securities Index as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the ICE BofA 1-10 Year U.S. Municipal Securities Index as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Limited Term Municipal Fund Class A (with sales charge) 4.56% 0.58% 1.03% Limited Term Municipal Fund Class A (without sales charge) 6.94% 0.88% 1.18% ICE BofA 1-10 Year U.S. Municipal Securities Index 7.43% 1.37% 1.82% ICE BofA U.S. Municipal Securities Index 10.52% 1.43% 2.58%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment and assumes the deduction of the maximum sales charge associated with that investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/flm/LTMFX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 2,492,900,000
Holdings Count | Holdings	801
Advisory Fees Paid, Amount	$ 8,700,000
Investment Company, Portfolio Turnover	39.61%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $2,492.9 Number of Holdings 801 Annual Portfolio Turnover 39.61% Total Advisory Fee $8.7
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) AAA 12.9 AA 36.0 A 42.6 BBB 4.7 NR 1.4 Below Invest. Grade 0.0 Cash & Cash Equivalent 2.3 Credit Quality Ratings (%) AAA 12.9% AA 36.0% A 42.6% BBB 4.7% NR 1.4% Below Invest. Grade 0.0% Cash & Cash Equivalent 2.3% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period
Thornburg Limited Term Municipal Fund - Class C
Shareholder Report [Line Items]
Class Name	CLASS: C
Trading Symbol	LTMCX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Limited Term Municipal Fund Class C Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $107.00 1.04%
Expenses Paid, Amount	$ 107
Expense Ratio, Percent	1.04%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class C shares underperformed the ICE BofA 1-10 Year U.S. Municipal Securities Index (the “Index”) during the 12-month period ended September 30, 2024. The period began with municipal bond yields peaking in October of 2023, which marked the end of the Federal Reserve rate hiking cycle, before falling precipitously throughout the period and ending significantly lower. The backdrop of falling municipal bond yields boosted bond prices due to the inverse relationship between the two, producing strong absolute returns for the asset class. However, the Fund’s underperformance during the period was driven by its shorter duration and yield curve positioning compared to the Index. The Fund’s relative performance benefited from active management with respect to its sector/quality returns thanks to the Fund’s higher weighting to revenue bonds and A-rated bonds. Specifically, within the revenue sector, hospital and other utility bonds were large contributors to relative performance during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Limited Term Municipal Fund ICE BofA 1-10 Year U.S. Municipal Securities Index ICE BofA U.S. Municipal Securities Index 09/30/2014 10000.0072 10000 10000 10/31/2014 10024.8463 10031.0861 10061.0061 11/30/2014 10022.4328 10036.9203 10074.732 12/31/2014 10019.3468 10037.6328 10133.237 01/31/2015 10119.2002 10163.3576 10315.1349 02/28/2015 10062.433 10102.8334 10213.0312 03/31/2015 10058.9588 10101.9427 10243.2441 04/30/2015 10042.3809 10091.7885 10191.582 05/31/2015 10011.5757 10054.6901 10157.4674 06/30/2015 10009.5502 10061.5931 10143.7215 07/31/2015 10048.204 10113.7892 10223.9759 08/31/2015 10045.207 10123.0972 10246.5455 09/30/2015 10098.4857 10181.2611 10315.6951 10/31/2015 10123.542 10221.0316 10359.774 11/30/2015 10121.3292 10219.8737 10410.5357 12/31/2015 10146.0818 10250.3808 10493.2511 01/31/2016 10233.2225 10357.5787 10609.5409 02/29/2016 10244.849 10380.4701 10618.4247 03/31/2016 10227.6211 10364.6599 10665.2047 04/30/2016 10267.2654 10412.4469 10746.9397 05/31/2016 10250.196 10394.6771 10780.454 06/30/2016 10331.664 10485.9311 10955.589 07/31/2016 10342.1736 10509.4015 10949.7465 08/31/2016 10338.6362 10512.5636 10974.9373 09/30/2016 10307.9884 10481.3439 10921.9146 10/31/2016 10255.415 10435.7837 10819.6708 11/30/2016 9992.0646 10188.5204 10425.262 12/31/2016 10052.5628 10245.66 10539.3308 01/31/2017 10099.3607 10316.8283 10592.9738 02/28/2017 10148.1191 10379.8912 10661.5031 03/31/2017 10152.7487 10387.2396 10685.8535 04/30/2017 10207.8288 10452.3956 10762.9465 05/31/2017 10297.6164 10545.3865 10922.1347 06/30/2017 10260.212 10509.8914 10897.224 07/31/2017 10307.2442 10573.934 10976.8981 08/31/2017 10361.2587 10635.349 11069.4177 09/30/2017 10308.9678 10584.3109 11027.4598 10/31/2017 10298.691 10581.0598 11047.8085 11/30/2017 10217.6789 10488.0688 11000.3481 12/31/2017 10258.0473 10535.2323 11110.0751 01/31/2018 10212.1992 10494.8828 10993.045 02/28/2018 10189.8631 10474.2182 10946.205 03/31/2018 10187.4125 10475.3761 10982.8206 04/30/2018 10157.3505 10443.1321 10940.1224 05/31/2018 10219.598 10529.888 11068.6574 06/30/2018 10232.449 10554.65 11080.8826 07/31/2018 10258.8626 10595.7566 11107.1138 08/31/2018 10256.9724 10601.3236 11124.0611 09/30/2018 10211.9229 10553.8929 11053.4109 10/31/2018 10188.3262 10524.6328 10973.8968 11/30/2018 10252.5039 10616.4213 11094.9286 12/31/2018 10316.2042 10713.0196 11225.6846 01/31/2019 10379.6893 10805.1198 11309.9006 02/28/2019 10416.9216 10853.9757 11374.1081 03/31/2019 10474.0487 10937.3469 11556.5862 04/30/2019 10473.7493 10949.2825 11604.8669 05/31/2019 10552.752 11066.0111 11776.3203 06/30/2019 10588.7264 11111.3932 11826.3817 07/31/2019 10646.131 11194.319 11920.3619 08/31/2019 10696.0046 11268.4267 12108.5024 09/30/2019 10636.3274 11192.2704 12018.0237 10/31/2019 10656.1923 11224.8261 12032.5099 11/30/2019 10669.6535 11243.7093 12055.2997 12/31/2019 10689.69 11278.67 12094.0362 01/31/2020 10782.9543 11411.0752 12310.4889 02/29/2020 10826.0277 11478.9924 12480.4216 03/31/2020 10647.3625 11208.2587 12011.9411 04/30/2020 10601.2773 11168.7109 11828.8427 05/31/2020 10813.4174 11448.9307 12213.0072 06/30/2020 10848.1003 11498.7218 12331.8981 07/31/2020 10933.6782 11617.7663 12529.0824 08/31/2020 10914.7441 11604.8954 12486.8844 09/30/2020 10918.4748 11606.3651 12478.7409 10/31/2020 10905.9628 11585.9676 12453.9903 11/30/2020 10953.4673 11664.3953 12644.4318 12/31/2020 10970.1688 11708.3968 12730.2285 01/31/2021 10993.8421 11755.4267 12814.1645 02/28/2021 10914.8374 11644.3096 12608.4364 03/31/2021 10930.6988 11679.6266 12685.0892 04/30/2021 10962.3907 11734.3612 12805.5408 05/31/2021 10963.2456 11746.5195 12861.4247 06/30/2021 10956.9788 11755.8721 12903.5827 07/31/2021 11002.8678 11818.8903 13000.3241 08/31/2021 10988.9914 11802.1003 12952.2436 09/30/2021 10930.178 11744.9162 12854.4017 10/31/2021 10901.0942 11724.6079 12840.0155 11/30/2021 10918.0701 11758.8114 12944.6803 12/31/2021 10926.5902 11765.1355 12962.708 01/31/2022 10709.2356 11516.7143 12614.479 02/28/2022 10674.7911 11477.4782 12543.3886 03/31/2022 10449.454 11243.0413 12161.105 04/30/2022 10279.7205 11063.3835 11801.7111 05/31/2022 10382.6957 11210.4855 11990.3119 06/30/2022 10335.1556 11159.1802 11760.3534 07/31/2022 10477.2835 11355.0045 12081.5509 08/31/2022 10339.1497 11175.5694 11774.1193 09/30/2022 10118.1781 10912.5404 11336.1319 10/31/2022 10095.813 10893.5681 11235.8489 11/30/2022 10318.9005 11188.4403 11804.6324 12/31/2022 10343.8234 11222.5102 11792.3671 01/31/2023 10506.2149 11436.9951 12154.9223 02/28/2023 10357.1828 11232.0409 11859.776 03/31/2023 10490.8202 11425.1485 12125.9499 04/30/2023 10463.7184 11387.1594 12111.7038 05/31/2023 10390.394 11297.3305 12018.8841 06/30/2023 10449.297 11365.8713 12128.6911 07/31/2023 10484.8546 11388.0947 12159.4442 08/31/2023 10428.0915 11332.8702 12012.0412 09/30/2023 10286.5609 11153.6577 11671.6555 10/31/2023 10261.8129 11126.4908 11525.4929 11/30/2023 10604.815 11522.2813 12262.5884 12/31/2023 10752.7893 11703.5424 12561.5363 01/31/2024 10729.0967 11680.6955 12533.8245 02/29/2024 10737.8854 11690.627 12535.4652 03/31/2024 10737.8953 11680.3837 12522.8598 04/30/2024 10667.4873 11593.6278 12382.8399 05/31/2024 10620.5988 11540.6301 12356.9688 06/30/2024 10717.2789 11666.8448 12555.7339 07/31/2024 10814.4058 11771.5932 12664.2203 08/31/2024 10911.8314 11895.1358 12763.903 09/30/2024 10977.9757 11981.8917 12899.3409 Effective September 30, 2024, the Fund adopted the ICE BofA U.S. Municipal Securities Index as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the ICE BofA 1-10 Year U.S. Municipal Securities Index as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Limited Term Municipal Fund Class C (with sales charge) 6.22% 0.63% 0.94% Limited Term Municipal Fund Class C (without sales charge) 6.72% 0.63% 0.94% ICE BofA 1-10 Year U.S. Municipal Securities Index 7.43% 1.37% 1.82% ICE BofA U.S. Municipal Securities Index 10.52% 1.43% 2.58%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/flm/LTMCX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 2,492,900,000
Holdings Count | Holdings	801
Advisory Fees Paid, Amount	$ 8,700,000
Investment Company, Portfolio Turnover	39.61%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $2,492.9 Number of Holdings 801 Annual Portfolio Turnover 39.61% Total Advisory Fee $8.7
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) AAA 12.9 AA 36.0 A 42.6 BBB 4.7 NR 1.4 Below Invest. Grade 0.0 Cash & Cash Equivalent 2.3 Credit Quality Ratings (%) AAA 12.9% AA 36.0% A 42.6% BBB 4.7% NR 1.4% Below Invest. Grade 0.0% Cash & Cash Equivalent 2.3% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period
Thornburg Limited Term Municipal Fund - Class C2
Shareholder Report [Line Items]
Class Name	CLASS: C2
Trading Symbol	LTMQX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Limited Term Municipal Fund Class C2 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C2 $128.00 1.24%
Expenses Paid, Amount	$ 128
Expense Ratio, Percent	1.24%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class C2 shares underperformed the ICE BofA 1-10 Year U.S. Municipal Securities Index (the “Index”) during the 12-month period ended September 30, 2024. The period began with municipal bond yields peaking in October of 2023, which marked the end of the Federal Reserve rate hiking cycle, before falling precipitously throughout the period and ending significantly lower. The backdrop of falling municipal bond yields boosted bond prices due to the inverse relationship between the two, producing strong absolute returns for the asset class. However, the Fund’s underperformance during the period was driven by its shorter duration and yield curve positioning compared to the Index. The Fund’s relative performance benefited from active management with respect to its sector/quality returns thanks to the Fund’s higher weighting to revenue bonds and A-rated bonds. Specifically, within the revenue sector, hospital and other utility bonds were large contributors to relative performance during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Limited Term Municipal Fund ICE BofA 1-10 Year U.S. Municipal Securities Index ICE BofA U.S. Municipal Securities Index 09/30/2020 9999.9965 10000 10000 10/31/2020 9985.7504 9982.4256 9980.1658 11/30/2020 10026.9685 10049.9987 10132.7786 12/31/2020 10046.8179 10087.9101 10201.5329 01/31/2021 10059.0069 10128.4309 10268.796 02/28/2021 9984.5352 10032.6929 10103.9332 03/31/2021 10003.7446 10063.1219 10165.3599 04/30/2021 10030.2886 10110.281 10261.8853 05/31/2021 10021.7468 10120.7565 10306.6686 06/30/2021 10020.5753 10128.8147 10340.4525 07/31/2021 10059.78 10183.111 10417.9775 08/31/2021 10037.5072 10168.6447 10379.4475 09/30/2021 9988.791 10119.3752 10301.0406 10/31/2021 9953.1031 10101.8775 10289.5121 11/30/2021 9973.3175 10131.3472 10373.3866 12/31/2021 9972.018 10136.796 10387.8333 01/31/2022 9771.1205 9922.7573 10108.7755 02/28/2022 9737.4776 9888.9516 10051.8062 03/31/2022 9529.6086 9686.9616 9745.4583 04/30/2022 9372.8753 9532.1691 9457.4535 05/31/2022 9464.8231 9658.9117 9608.5911 06/30/2022 9419.6465 9614.7072 9424.3109 07/31/2022 9546.9825 9783.4287 9681.7067 08/31/2022 9418.8757 9628.8281 9435.3424 09/30/2022 9215.5763 9402.2033 9084.3555 10/31/2022 9193.0243 9385.8569 9003.9925 11/30/2022 9394.1775 9639.9176 9459.7944 12/31/2022 9414.5921 9669.2721 9449.9655 01/31/2023 9560.3943 9854.0715 9740.5038 02/28/2023 9422.9918 9677.4837 9503.9845 03/31/2023 9549.6232 9843.8645 9717.2864 04/30/2023 9515.759 9811.1332 9705.8701 05/31/2023 9453.8733 9733.737 9631.4878 06/30/2023 9498.2895 9792.7914 9719.4831 07/31/2023 9528.4228 9811.9391 9744.1275 08/31/2023 9481.768 9764.3578 9626.0041 09/30/2023 9344.0803 9609.9491 9353.2317 10/31/2023 9319.9705 9586.5422 9236.1024 11/30/2023 9629.9188 9927.5537 9826.7834 12/31/2023 9762.6306 10083.7276 10066.3492 01/31/2024 9739.539 10064.0428 10044.1419 02/29/2024 9746.0937 10072.5997 10045.4567 03/31/2024 9744.6103 10063.7742 10035.3552 04/30/2024 9679.1155 9989.0256 9923.1485 05/31/2024 9634.9618 9943.363 9902.4163 06/30/2024 9721.1503 10052.1091 10061.6993 07/31/2024 9807.4081 10142.36 10148.6363 08/31/2024 9893.9496 10248.8038 10228.5183 09/30/2024 9952.1313 10323.5523 10337.0532 Effective September 30, 2024, the Fund adopted the ICE BofA U.S. Municipal Securities Index as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the ICE BofA 1-10 Year U.S. Municipal Securities Index as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe
Average Annual Return [Table Text Block]	Annual Performance 1 Year Limited Term Municipal Fund Class C2 (with sales charge) 5.86% Limited Term Municipal Fund Class C2 (without sales charge) 6.51% ICE BofA 1-10 Year U.S. Municipal Securities Index 7.43% ICE BofA U.S. Municipal Securities Index 10.52%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 2,492,900,000
Holdings Count | Holdings	801
Advisory Fees Paid, Amount	$ 8,700,000
Investment Company, Portfolio Turnover	39.61%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $2,492.9 Number of Holdings 801 Annual Portfolio Turnover 39.61% Total Advisory Fee $8.7
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) AAA 12.9 AA 36.0 A 42.6 BBB 4.7 NR 1.4 Below Invest. Grade 0.0 Cash & Cash Equivalent 2.3 Credit Quality Ratings (%) AAA 12.9% AA 36.0% A 42.6% BBB 4.7% NR 1.4% Below Invest. Grade 0.0% Cash & Cash Equivalent 2.3% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period
Thornburg Limited Term Municipal Fund - Class I
Shareholder Report [Line Items]
Class Name	CLASS: I
Trading Symbol	LTMIX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Limited Term Municipal Fund Class I Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $52.00 0.51%
Expenses Paid, Amount	$ 52
Expense Ratio, Percent	0.51%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class I shares underperformed the ICE BofA 1-10 Year U.S. Municipal Securities Index (the “Index”) during the 12-month period ended September 30, 2024. The period began with municipal bond yields peaking in October of 2023, which marked the end of the Federal Reserve rate hiking cycle, before falling precipitously throughout the period and ending significantly lower. The backdrop of falling municipal bond yields boosted bond prices due to the inverse relationship between the two, producing strong absolute returns for the asset class. However, the Fund’s underperformance during the period was driven by its shorter duration and yield curve positioning compared to the Index. The Fund’s relative performance benefited from active management with respect to its sector/quality returns thanks to the Fund’s higher weighting to revenue bonds and A-rated bonds. Specifically, within the revenue sector, hospital and other utility bonds were large contributors to relative performance during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Limited Term Municipal Fund ICE BofA 1-10 Year U.S. Municipal Securities Index ICE BofA U.S. Municipal Securities Index 09/30/2014 9999.9992 10000 10000 10/31/2014 10029.7912 10031.0861 10061.0061 11/30/2014 10032.1627 10036.9203 10074.732 12/31/2014 10027.1034 10037.6328 10133.237 01/31/2015 10138.8323 10163.3576 10315.1349 02/28/2015 10079.2415 10102.8334 10213.0312 03/31/2015 10080.4413 10101.9427 10243.2441 04/30/2015 10068.139 10091.7885 10191.582 05/31/2015 10041.7181 10054.6901 10157.4674 06/30/2015 10044.0597 10061.5931 10143.7215 07/31/2015 10087.463 10113.7892 10223.9759 08/31/2015 10096.1531 10123.0972 10246.5455 09/30/2015 10154.1888 10181.2611 10315.6951 10/31/2015 10184.1416 10221.0316 10359.774 11/30/2015 10186.5326 10219.8737 10410.5357 12/31/2015 10216.297 10250.3808 10493.2511 01/31/2016 10301.88 10357.5787 10609.5409 02/29/2016 10318.0829 10380.4701 10618.4247 03/31/2016 10305.4265 10364.6599 10665.2047 04/30/2016 10350.0931 10412.4469 10746.9397 05/31/2016 10337.6854 10394.6771 10780.454 06/30/2016 10431.7549 10485.9311 10955.589 07/31/2016 10440.0842 10509.4015 10949.7465 08/31/2016 10441.3729 10512.5636 10974.9373 09/30/2016 10422.1135 10481.3439 10921.9146 10/31/2016 10366.5983 10435.7837 10819.6708 11/30/2016 10111.5994 10188.5204 10425.262 12/31/2016 10170.4568 10245.66 10539.3308 01/31/2017 10222.6427 10316.8283 10592.9738 02/28/2017 10276.3614 10379.8912 10661.5031 03/31/2017 10285.7275 10387.2396 10685.8535 04/30/2017 10353.4418 10452.3956 10762.9465 05/31/2017 10442.252 10545.3865 10922.1347 06/30/2017 10416.1716 10509.8914 10897.224 07/31/2017 10461.6654 10573.934 10976.8981 08/31/2017 10521.555 10635.349 11069.4177 09/30/2017 10472.8467 10584.3109 11027.4598 10/31/2017 10474.5569 10581.0598 11047.8085 11/30/2017 10396.8253 10488.0688 11000.3481 12/31/2017 10435.6391 10535.2323 11110.0751 01/31/2018 10401.1666 10494.8828 10993.045 02/28/2018 10382.2696 10474.2182 10946.205 03/31/2018 10384.0594 10475.3761 10982.8206 04/30/2018 10350.2178 10443.1321 10940.1224 05/31/2018 10418.0957 10529.888 11068.6574 06/30/2018 10442.8043 10554.65 11080.8826 07/31/2018 10466.842 10595.7566 11107.1138 08/31/2018 10469.3203 10601.3236 11124.0611 09/30/2018 10434.8742 10553.8929 11053.4109 10/31/2018 10415.0823 10524.6328 10973.8968 11/30/2018 10477.5921 10616.4213 11094.9286 12/31/2018 10554.6497 10713.0196 11225.6846 01/31/2019 10624.085 10805.1198 11309.9006 02/28/2019 10658.8062 10853.9757 11374.1081 03/31/2019 10721.8746 10937.3469 11556.5862 04/30/2019 10733.213 10949.2825 11604.8669 05/31/2019 10818.6194 11066.0111 11776.3203 06/30/2019 10852.2809 11111.3932 11826.3817 07/31/2019 10923.186 11194.319 11920.3619 08/31/2019 10978.9243 11268.4267 12108.5024 09/30/2019 10921.9127 11192.2704 12018.0237 10/31/2019 10946.9891 11224.8261 12032.5099 11/30/2019 10957.7591 11243.7093 12055.2997 12/31/2019 10983.0628 11278.67 12094.0362 01/31/2020 11083.6723 11411.0752 12310.4889 02/29/2020 11139.9403 11478.9924 12480.4216 03/31/2020 10960.387 11208.2587 12011.9411 04/30/2020 10917.1313 11168.7109 11828.8427 05/31/2020 11140.3365 11448.9307 12213.0072 06/30/2020 11180.4483 11498.7218 12331.8981 07/31/2020 11265.4026 11617.7663 12529.0824 08/31/2020 11257.8804 11604.8954 12486.8844 09/30/2020 11265.9485 11606.3651 12478.7409 10/31/2020 11250.2198 11585.9676 12453.9903 11/30/2020 11304.2623 11664.3953 12644.4318 12/31/2020 11334.2914 11708.3968 12730.2285 01/31/2021 11363.8021 11755.4267 12814.1645 02/28/2021 11278.8458 11644.3096 12608.4364 03/31/2021 11308.073 11679.6266 12685.0892 04/30/2021 11345.4832 11734.3612 12805.5408 05/31/2021 11351.1204 11746.5195 12861.4247 06/30/2021 11349.2907 11755.8721 12903.5827 07/31/2021 11401.2175 11818.8903 13000.3241 08/31/2021 11391.1244 11802.1003 12952.2436 09/30/2021 11335.0379 11744.9162 12854.4017 10/31/2021 11302.0242 11724.6079 12840.0155 11/30/2021 11332.3397 11758.8114 12944.6803 12/31/2021 11338.4186 11765.1355 12962.708 01/31/2022 11116.9027 11516.7143 12614.479 02/28/2022 11092.9293 11477.4782 12543.3886 03/31/2022 10854.9778 11243.0413 12161.105 04/30/2022 10690.2701 11063.3835 11801.7111 05/31/2022 10801.687 11210.4855 11990.3119 06/30/2022 10748.2902 11159.1802 11760.3534 07/31/2022 10900.9197 11355.0045 12081.5509 08/31/2022 10761.4058 11175.5694 11774.1193 09/30/2022 10543.1453 10912.5404 11336.1319 10/31/2022 10524.0239 10893.5681 11235.8489 11/30/2022 10761.084 11188.4403 11804.6324 12/31/2022 10791.3255 11222.5102 11792.3671 01/31/2023 10957.2432 11436.9951 12154.9223 02/28/2023 10813.3467 11232.0409 11859.776 03/31/2023 10957.3429 11425.1485 12125.9499 04/30/2023 10932.953 11387.1594 12111.7038 05/31/2023 10860.2769 11297.3305 12018.8841 06/30/2023 10925.85 11365.8713 12128.6911 07/31/2023 10959.4379 11388.0947 12159.4442 08/31/2023 10912.558 11332.8702 12012.0412 09/30/2023 10768.593 11153.6577 11671.6555 10/31/2023 10747.4827 11126.4908 11525.4929 11/30/2023 11112.0207 11522.2813 12262.5884 12/31/2023 11272.3874 11703.5424 12561.5363 01/31/2024 11252.5772 11680.6955 12533.8245 02/29/2024 11266.573 11690.627 12535.4652 03/31/2024 11271.7227 11680.3837 12522.8598 04/30/2024 11194.1705 11593.6278 12382.8399 05/31/2024 11158.1172 11540.6301 12356.9688 06/30/2024 11256.3288 11666.8448 12555.7339 07/31/2024 11371.9313 11771.5932 12664.2203 08/31/2024 11479.6227 11895.1358 12763.903 09/30/2024 11545.8311 11981.8917 12899.3409 Effective September 30, 2024, the Fund adopted the ICE BofA U.S. Municipal Securities Index as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the ICE BofA 1-10 Year U.S. Municipal Securities Index as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Limited Term Municipal Fund Class I 7.22% 1.12% 1.45% ICE BofA 1-10 Year U.S. Municipal Securities Index 7.43% 1.37% 1.82% ICE BofA U.S. Municipal Securities Index 10.52% 1.43% 2.58%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/flm/LTMIX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 2,492,900,000
Holdings Count | Holdings	801
Advisory Fees Paid, Amount	$ 8,700,000
Investment Company, Portfolio Turnover	39.61%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $2,492.9 Number of Holdings 801 Annual Portfolio Turnover 39.61% Total Advisory Fee $8.7
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) AAA 12.9 AA 36.0 A 42.6 BBB 4.7 NR 1.4 Below Invest. Grade 0.0 Cash & Cash Equivalent 2.3 Credit Quality Ratings (%) AAA 12.9% AA 36.0% A 42.6% BBB 4.7% NR 1.4% Below Invest. Grade 0.0% Cash & Cash Equivalent 2.3% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period
Thornburg Intermediate Municipal Fund - Class A
Shareholder Report [Line Items]
Class Name	CLASS: A
Trading Symbol	THIMX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Intermediate Municipal Fund Class A Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $77.00 0.74%
Expenses Paid, Amount	$ 77
Expense Ratio, Percent	0.74%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class A shares performed in-line with the ICE BofA 3-15 Year U.S. Municipal Securities Index (the “Index”) during the 12-month period ended September 30, 2024. The period began with municipal bond yields peaking in October of 2023, which marked the end of the Federal Reserve rate hiking cycle, before falling precipitously throughout the period and ending significantly lower. The backdrop of falling municipal bond yields boosted bond prices due to the inverse relationship between the two, which produced strong absolute returns for the asset class. However, the Fund’s relative performance was hampered during the period by individual bond selection. The Fund’s relative performance benefited from active management due to its longer duration and sector/quality returns from its higher weighting to revenue and A-rated bonds. Specifically, within the revenue sector and other utilities bonds were a large contributor to relative performance during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Intermediate Municipal Fund ICE BofA 3-15 Year U.S. Municipal Securities Index ICE BofA U.S. Municipal Securities Index 09/30/2014 9800.2721 10000 10000 10/31/2014 9852.3432 10047.8828 10061.0061 11/30/2014 9849.486 10053.6678 10074.732 12/31/2014 9887.3292 10084.4301 10133.237 01/31/2015 10015.0353 10254.7365 10315.1349 02/28/2015 9922.4152 10156.2738 10213.0312 03/31/2015 9939.1942 10171.2054 10243.2441 04/30/2015 9893.793 10142.593 10191.582 05/31/2015 9861.7469 10095.8047 10157.4674 06/30/2015 9850.6496 10091.6614 10143.7215 07/31/2015 9902.417 10164.9514 10223.9759 08/31/2015 9912 10178.2804 10246.5455 09/30/2015 9964.8966 10260.1697 10315.6951 10/31/2015 10004.0562 10309.2642 10359.774 11/30/2015 10029.4038 10336.704 10410.5357 12/31/2015 10095.9457 10403.1536 10493.2511 01/31/2016 10189.7892 10545.9421 10609.5409 02/29/2016 10192.0231 10558.2157 10618.4247 03/31/2016 10215.3363 10572.4828 10665.2047 04/30/2016 10274.912 10641.3168 10746.9397 05/31/2016 10291.4746 10632.3656 10780.454 06/30/2016 10430.1228 10781.0955 10955.589 07/31/2016 10411.1717 10791.4929 10949.7465 08/31/2016 10420.6081 10807.5581 10974.9373 09/30/2016 10380.8793 10772.5352 10921.9146 10/31/2016 10297.3517 10684.1963 10819.6708 11/30/2016 9969.9225 10291.4401 10425.262 12/31/2016 10045.0623 10397.3686 10539.3308 01/31/2017 10062.7255 10465.499 10592.9738 02/28/2017 10110.8434 10539.5316 10661.5031 03/31/2017 10128.9764 10563.688 10685.8535 04/30/2017 10198.8104 10656.2093 10762.9465 05/31/2017 10326.659 10805.9945 10922.1347 06/30/2017 10294.9485 10760.9261 10897.224 07/31/2017 10342.7897 10844.2226 10976.8981 08/31/2017 10412.4183 10935.1022 11069.4177 09/30/2017 10372.6999 10880.3008 11027.4598 10/31/2017 10376.4503 10886.9849 11047.8085 11/30/2017 10329.5088 10795.4017 11000.3481 12/31/2017 10407.3719 10879.48 11110.0751 01/31/2018 10308.4549 10775.5841 10993.045 02/28/2018 10277.6694 10732.2746 10946.205 03/31/2018 10297.2682 10752.9521 10982.8206 04/30/2018 10265.8 10716.9521 10940.1224 05/31/2018 10352.5036 10832.1835 11068.6574 06/30/2018 10365.4802 10844.8089 11080.8826 07/31/2018 10385.3989 10887.923 11107.1138 08/31/2018 10398.1234 10900.5093 11124.0611 09/30/2018 10350.8142 10842.2682 11053.4109 10/31/2018 10296.372 10780.9782 10973.8968 11/30/2018 10384.8491 10907.4279 11094.9286 12/31/2018 10465.7611 11037.0046 11225.6846 01/31/2019 10539.2255 11148.21 11309.9006 02/28/2019 10584.1889 11210.7117 11374.1081 03/31/2019 10688.3533 11343.3373 11556.5862 04/30/2019 10717.3894 11371.5979 11604.8669 05/31/2019 10838.0858 11536.2365 11776.3203 06/30/2019 10883.7225 11586.5037 11826.3817 07/31/2019 10959.9266 11687.9371 11920.3619 08/31/2019 11089.75 11824.3933 12108.5024 09/30/2019 11012.691 11725.0707 12018.0237 10/31/2019 11019.0864 11746.7645 12032.5099 11/30/2019 11033.7656 11765.8003 12055.2997 12/31/2019 11055.7733 11810.2043 12094.0362 01/31/2020 11232.367 12006.387 12310.4889 02/29/2020 11356.9325 12123.3774 12480.4216 03/31/2020 10945.6158 11719.2465 12011.9411 04/30/2020 10821.6392 11604.3278 11828.8427 05/31/2020 11070.9218 11977.5009 12213.0072 06/30/2020 11187.641 12060.0157 12331.8981 07/31/2020 11350.7889 12237.8661 12529.0824 08/31/2020 11317.7088 12208.4328 12486.8844 09/30/2020 11316.3319 12204.7586 12478.7409 10/31/2020 11282.7429 12179.5859 12453.9903 11/30/2020 11415.412 12323.1952 12644.4318 12/31/2020 11476.5147 12395.5471 12730.2285 01/31/2021 11545.8033 12465.5928 12814.1645 02/28/2021 11410.3164 12279.4948 12608.4364 03/31/2021 11463.6784 12337.4232 12685.0892 04/30/2021 11533.4843 12430.1791 12805.5408 05/31/2021 11555.0003 12459.2214 12861.4247 06/30/2021 11585.2363 12480.9153 12903.5827 07/31/2021 11654.6087 12575.5864 13000.3241 08/31/2021 11635.5585 12545.9186 12952.2436 09/30/2021 11560.36 12456.0944 12854.4017 10/31/2021 11516.4608 12428.3028 12840.0155 11/30/2021 11585.9913 12499.9902 12944.6803 12/31/2021 11590.0268 12512.5375 12962.708 01/31/2022 11326.46 12167.3123 12614.479 02/28/2022 11283.4129 12112.0809 12543.3886 03/31/2022 10978.7995 11777.5267 12161.105 04/30/2022 10757.6214 11497.6567 11801.7111 05/31/2022 10877.9503 11677.4615 11990.3119 06/30/2022 10794.7247 11554.9988 11760.3534 07/31/2022 10990.2517 11842.8819 12081.5509 08/31/2022 10833.5357 11611.2855 11774.1193 09/30/2022 10578.1666 11242.6075 11336.1319 10/31/2022 10520.9791 11202.2296 11235.8489 11/30/2022 10811.9074 11634.8946 11804.6324 12/31/2022 10846.9381 11681.9957 11792.3671 01/31/2023 11047.7281 11983.4423 12154.9223 02/28/2023 10893.2639 11726.2824 11859.776 03/31/2023 11053.9176 11967.0254 12125.9499 04/30/2023 11048.6491 11938.2566 12111.7038 05/31/2023 10976.6286 11817.0447 12018.8841 06/30/2023 11056.2166 11902.6474 12128.6911 07/31/2023 11102.367 11933.0188 12159.4442 08/31/2023 11013.2964 11829.2011 12012.0412 09/30/2023 10822.5449 11557.1486 11671.6555 10/31/2023 10759.6464 11480.6925 11525.4929 11/30/2023 11243.7403 12052.0418 12262.5884 12/31/2023 11438.2997 12314.205 12561.5363 01/31/2024 11426.5104 12277.4232 12533.8245 02/29/2024 11450.192 12288.2896 12535.4652 03/31/2024 11482.2258 12276.5241 12522.8598 04/30/2024 11385.0112 12144.3676 12382.8399 05/31/2024 11374.0107 12061.032 12356.9688 06/30/2024 11511.1108 12227.9768 12555.7339 07/31/2024 11604.8603 12337.7359 12664.2203 08/31/2024 11672.5322 12462.583 12763.903 09/30/2024 11776.1929 12575.0392 12899.3409 Effective September 30, 2024, the Fund adopted the ICE BofA U.S. Municipal Securities Index as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the ICE BofA 3-15 Year U.S. Municipal Securities Index as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Intermediate Municipal Fund Class A (with sales charge) 6.63% 0.94% 1.65% Intermediate Municipal Fund Class A (without sales charge) 8.81% 1.35% 1.85% ICE BofA 3-15 Year U.S. Municipal Securities Index 8.81% 1.41% 2.32% ICE BofA U.S. Municipal Securities Index 10.52% 1.43% 2.58%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment and assumes the deduction of the maximum sales charge associated with that investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fim/THIMX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 1,020,500,000
Holdings Count | Holdings	479
Advisory Fees Paid, Amount	$ 4,500,000
Investment Company, Portfolio Turnover	29.65%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $1,020.5 Number of Holdings 479 Annual Portfolio Turnover 29.65% Total Advisory Fee $4.5
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) AAA 10.8 AA 38.6 A 38.3 BBB 7.4 NR 2.5 Below Invest. Grade 0.0 Cash & Cash Equivalent 2.5 Credit Quality Ratings (%) AAA 10.8% AA 38.6% A 38.3% BBB 7.4% NR 2.5% Below Invest. Grade 0.0% Cash & Cash Equivalent 2.5% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Intermediate Municipal Fund - Class C
Shareholder Report [Line Items]
Class Name	CLASS: C
Trading Symbol	THMCX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Intermediate Municipal Fund Class C Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $116.00 1.11%
Expenses Paid, Amount	$ 116
Expense Ratio, Percent	1.11%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class C shares underperformed the ICE BofA 3-15 Year U.S. Municipal Securities Index (the “Index”) during the 12-month period ended September 30, 2024. The period began with municipal bond yields peaking in October of 2023, which marked the end of the Federal Reserve rate hiking cycle, before falling precipitously throughout the period and ending significantly lower. The backdrop of falling municipal bond yields boosted bond prices due to the inverse relationship between the two, which produced strong absolute returns for the asset class. However, the Fund’s relative performance was hampered during the period by individual bond selection. The Fund’s relative performance benefited from active management due to its longer duration and sector/quality returns from its higher weighting to revenue and A-rated bonds. Specifically, within the revenue sector and other utilities bonds were a large contributor to relative performance during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Intermediate Municipal Fund ICE BofA 3-15 Year U.S. Municipal Securities Index ICE BofA U.S. Municipal Securities Index 09/30/2014 9999.9945 10000 10000 10/31/2014 10050.2402 10047.8828 10061.0061 11/30/2014 10044.6673 10053.6678 10074.732 12/31/2014 10080.4275 10084.4301 10133.237 01/31/2015 10207.5743 10254.7365 10315.1349 02/28/2015 10110.8007 10156.2738 10213.0312 03/31/2015 10125.1293 10171.2054 10243.2441 04/30/2015 10076.1973 10142.593 10191.582 05/31/2015 10040.7999 10095.8047 10157.4674 06/30/2015 10019.7794 10091.6614 10143.7215 07/31/2015 10069.6879 10164.9514 10223.9759 08/31/2015 10084.1248 10178.2804 10246.5455 09/30/2015 10135.4062 10260.1697 10315.6951 10/31/2015 10165.2798 10309.2642 10359.774 11/30/2015 10195.4535 10336.704 10410.5357 12/31/2015 10260.2214 10403.1536 10493.2511 01/31/2016 10352.5475 10545.9421 10609.5409 02/29/2016 10352.7272 10558.2157 10618.4247 03/31/2016 10373.5296 10572.4828 10665.2047 04/30/2016 10431.2271 10641.3168 10746.9397 05/31/2016 10445.2388 10632.3656 10780.454 06/30/2016 10582.9616 10781.0955 10955.589 07/31/2016 10560.8772 10791.4929 10949.7465 08/31/2016 10567.621 10807.5581 10974.9373 09/30/2016 10524.3913 10772.5352 10921.9146 10/31/2016 10436.9129 10684.1963 10819.6708 11/30/2016 10102.7693 10291.4401 10425.262 12/31/2016 10176.0368 10397.3686 10539.3308 01/31/2017 10191.1306 10465.499 10592.9738 02/28/2017 10229.9768 10539.5316 10661.5031 03/31/2017 10252.9073 10563.688 10685.8535 04/30/2017 10320.7571 10656.2093 10762.9465 05/31/2017 10447.0783 10805.9945 10922.1347 06/30/2017 10412.3425 10760.9261 10897.224 07/31/2017 10457.8918 10844.2226 10976.8981 08/31/2017 10525.335 10935.1022 11069.4177 09/30/2017 10482.6401 10880.3008 11027.4598 10/31/2017 10476.1563 10886.9849 11047.8085 11/30/2017 10426.0273 10795.4017 11000.3481 12/31/2017 10509.1167 10879.48 11110.0751 01/31/2018 10406.5023 10775.5841 10993.045 02/28/2018 10372.6314 10732.2746 10946.205 03/31/2018 10389.2399 10752.9521 10982.8206 04/30/2018 10354.4929 10716.9521 10940.1224 05/31/2018 10438.6684 10832.1835 11068.6574 06/30/2018 10448.6582 10844.8089 11080.8826 07/31/2018 10465.4736 10887.923 11107.1138 08/31/2018 10475.1063 10900.5093 11124.0611 09/30/2018 10424.965 10842.2682 11053.4109 10/31/2018 10367.175 10780.9782 10973.8968 11/30/2018 10445.6616 10907.4279 11094.9286 12/31/2018 10531.5508 11037.0046 11225.6846 01/31/2019 10602.3548 11148.21 11309.9006 02/28/2019 10644.7811 11210.7117 11374.1081 03/31/2019 10746.3291 11343.3373 11556.5862 04/30/2019 10764.927 11371.5979 11604.8669 05/31/2019 10890.6808 11536.2365 11776.3203 06/30/2019 10933.5456 11586.5037 11826.3817 07/31/2019 11006.4232 11687.9371 11920.3619 08/31/2019 11132.9914 11824.3933 12108.5024 09/30/2019 11052.2839 11725.0707 12018.0237 10/31/2019 11055.3944 11746.7645 12032.5099 11/30/2019 11059.2116 11765.8003 12055.2997 12/31/2019 11085.7134 11810.2043 12094.0362 01/31/2020 11259.171 12006.387 12310.4889 02/29/2020 11380.5742 12123.3774 12480.4216 03/31/2020 10965.5284 11719.2465 12011.9411 04/30/2020 10830.4497 11604.3278 11828.8427 05/31/2020 11076.3525 11977.5009 12213.0072 06/30/2020 11189.6785 12060.0157 12331.8981 07/31/2020 11357.0012 12237.8661 12529.0824 08/31/2020 11320.3922 12208.4328 12486.8844 09/30/2020 11315.5909 12204.7586 12478.7409 10/31/2020 11278.4893 12179.5859 12453.9903 11/30/2020 11407.494 12323.1952 12644.4318 12/31/2020 11464.8879 12395.5471 12730.2285 01/31/2021 11522.5219 12465.5928 12814.1645 02/28/2021 11384.1485 12279.4948 12608.4364 03/31/2021 11441.7129 12337.4232 12685.0892 04/30/2021 11507.8174 12430.1791 12805.5408 05/31/2021 11525.6589 12459.2214 12861.4247 06/30/2021 11552.2598 12480.9153 12903.5827 07/31/2021 11617.7217 12575.5864 13000.3241 08/31/2021 11587.1422 12545.9186 12952.2436 09/30/2021 11516.8221 12456.0944 12854.4017 10/31/2021 11469.5541 12428.3028 12840.0155 11/30/2021 11535.2188 12499.9902 12944.6803 12/31/2021 11535.6213 12512.5375 12962.708 01/31/2022 11262.0412 12167.3123 12614.479 02/28/2022 11224.1666 12112.0809 12543.3886 03/31/2022 10918.1115 11777.5267 12161.105 04/30/2022 10695.2076 11497.6567 11801.7111 05/31/2022 10811.3378 11677.4615 11990.3119 06/30/2022 10717.3961 11554.9988 11760.3534 07/31/2022 10916.1358 11842.8819 12081.5509 08/31/2022 10757.3183 11611.2855 11774.1193 09/30/2022 10492.7461 11242.6075 11336.1319 10/31/2022 10440.9651 11202.2296 11235.8489 11/30/2022 10717.8345 11634.8946 11804.6324 12/31/2022 10757.3942 11681.9957 11792.3671 01/31/2023 10952.8526 11983.4423 12154.9223 02/28/2023 10788.6307 11726.2824 11859.776 03/31/2023 10952.5056 11967.0254 12125.9499 04/30/2023 10943.9866 11938.2566 12111.7038 05/31/2023 10869.3548 11817.0447 12018.8841 06/30/2023 10944.7565 11902.6474 12128.6911 07/31/2023 10986.9453 11933.0188 12159.4442 08/31/2023 10895.534 11829.2011 12012.0412 09/30/2023 10695.4914 11557.1486 11671.6555 10/31/2023 10638.4763 11480.6925 11525.4929 11/30/2023 11104.6884 12052.0418 12262.5884 12/31/2023 11301.6695 12314.205 12561.5363 01/31/2024 11286.5396 12277.4232 12533.8245 02/29/2024 11298.1326 12288.2896 12535.4652 03/31/2024 11326.2066 12276.5241 12522.8598 04/30/2024 11235.541 12144.3676 12382.8399 05/31/2024 11212.6469 12061.032 12356.9688 06/30/2024 11344.3176 12227.9768 12555.7339 07/31/2024 11433.1002 12337.7359 12664.2203 08/31/2024 11504.7238 12462.583 12763.903 09/30/2024 11603.194 12575.0392 12899.3409 Effective September 30, 2024, the Fund adopted the ICE BofA U.S. Municipal Securities Index as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the ICE BofA 3-15 Year U.S. Municipal Securities Index as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Intermediate Municipal Fund Class C (with sales charge) 7.89% 0.98% 1.50% Intermediate Municipal Fund Class C (without sales charge) 8.49% 0.98% 1.50% ICE BofA 3-15 Year U.S. Municipal Securities Index 8.81% 1.41% 2.32% ICE BofA U.S. Municipal Securities Index 10.52% 1.43% 2.58%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fim/THMCX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 1,020,500,000
Holdings Count | Holdings	479
Advisory Fees Paid, Amount	$ 4,500,000
Investment Company, Portfolio Turnover	29.65%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $1,020.5 Number of Holdings 479 Annual Portfolio Turnover 29.65% Total Advisory Fee $4.5
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) AAA 10.8 AA 38.6 A 38.3 BBB 7.4 NR 2.5 Below Invest. Grade 0.0 Cash & Cash Equivalent 2.5 Credit Quality Ratings (%) AAA 10.8% AA 38.6% A 38.3% BBB 7.4% NR 2.5% Below Invest. Grade 0.0% Cash & Cash Equivalent 2.5% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Intermediate Municipal Fund - Class C2
Shareholder Report [Line Items]
Class Name	CLASS: C2
Trading Symbol	THMQX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Intermediate Municipal Fund Class C2 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C2 $115.00 1.11%
Expenses Paid, Amount	$ 115
Expense Ratio, Percent	1.11%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class C2 shares underperformed the ICE BofA 3-15 Year U.S. Municipal Securities Index (the “Index”) during the 12-month period ended September 30, 2024. The period began with municipal bond yields peaking in October of 2023, which marked the end of the Federal Reserve rate hiking cycle, before falling precipitously throughout the period and ending significantly lower. The backdrop of falling municipal bond yields boosted bond prices due to the inverse relationship between the two, which produced strong absolute returns for the asset class. However, the Fund’s relative performance was hampered during the period by individual bond selection. The Fund’s relative performance benefited from active management due to its longer duration and sector/quality returns from its higher weighting to revenue and A-rated bonds. Specifically, within the revenue sector and other utilities bonds were a large contributor to relative performance during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Intermediate Municipal Fund ICE BofA 3-15 Year U.S. Municipal Securities Index ICE BofA U.S. Municipal Securities Index 09/30/2020 9999.9995 10000 10000 10/31/2020 9966.8632 9979.3747 9980.1658 11/30/2020 10079.9214 10097.0414 10132.7786 12/31/2020 10130.3016 10156.3231 10201.5329 01/31/2021 10188.2036 10213.7152 10268.796 02/28/2021 10065.9551 10061.2353 10103.9332 03/31/2021 10109.6237 10108.6991 10165.3599 04/30/2021 10168.0401 10184.6989 10261.8853 05/31/2021 10183.74 10208.4948 10306.6686 06/30/2021 10207.2706 10226.2697 10340.4525 07/31/2021 10265.0946 10303.8387 10417.9775 08/31/2021 10245.0676 10279.5304 10379.4475 09/30/2021 10175.8568 10205.9327 10301.0406 10/31/2021 10134.0965 10183.1616 10289.5121 11/30/2021 10192.1306 10241.8988 10373.3866 12/31/2021 10192.4991 10252.1794 10387.8333 01/31/2022 9957.8981 9969.3183 10108.7755 02/28/2022 9917.2608 9924.0643 10051.8062 03/31/2022 9646.776 9649.9465 9745.4583 04/30/2022 9449.8668 9420.6343 9457.4535 05/31/2022 9552.4913 9567.9578 9608.5911 06/30/2022 9476.6457 9467.6177 9424.3109 07/31/2022 9645.0654 9703.4954 9681.7067 08/31/2022 9504.757 9513.7363 9435.3424 09/30/2022 9271.0093 9211.6591 9084.3555 10/31/2022 9225.2761 9178.5753 9003.9925 11/30/2022 9477.0674 9533.0805 9459.7944 12/31/2022 9505.0137 9571.6729 9449.9655 01/31/2023 9677.7203 9818.664 9740.5038 02/28/2023 9532.6205 9607.9593 9503.9845 03/31/2023 9677.4234 9805.2127 9717.2864 04/30/2023 9669.9024 9781.6409 9705.8701 05/31/2023 9603.9583 9682.3257 9631.4878 06/30/2023 9670.5946 9752.4645 9719.4831 07/31/2023 9707.8846 9777.3493 9744.1275 08/31/2023 9627.137 9692.286 9626.0041 09/30/2023 9450.3828 9469.3791 9353.2317 10/31/2023 9400.0164 9406.7346 9236.1024 11/30/2023 9811.9777 9874.8711 9826.7834 12/31/2023 9986.0136 10089.6752 10066.3492 01/31/2024 9972.6725 10059.5379 10044.1419 02/29/2024 9990.3189 10068.4414 10045.4567 03/31/2024 10015.1314 10058.8013 10035.3552 04/30/2024 9927.4934 9950.5185 9923.1485 05/31/2024 9907.276 9882.2373 9902.4163 06/30/2024 10031.1984 10019.0239 10061.6993 07/31/2024 10109.6656 10108.9553 10148.6363 08/31/2024 10165.3978 10211.2491 10228.5183 09/30/2024 10252.4338 10303.3904 10337.0532 Effective September 30, 2024, the Fund adopted the ICE BofA U.S. Municipal Securities Index as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the ICE BofA 3-15 Year U.S. Municipal Securities Index as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year Intermediate Municipal Fund Class C2 (with sales charge) 7.84% Intermediate Municipal Fund Class C2 (without sales charge) 8.49% ICE BofA 3-15 Year U.S. Municipal Securities Index 8.81% ICE BofA U.S. Municipal Securities Index 10.52%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 1,020,500,000
Holdings Count | Holdings	479
Advisory Fees Paid, Amount	$ 4,500,000
Investment Company, Portfolio Turnover	29.65%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $1,020.5 Number of Holdings 479 Annual Portfolio Turnover 29.65% Total Advisory Fee $4.5
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) AAA 10.8 AA 38.6 A 38.3 BBB 7.4 NR 2.5 Below Invest. Grade 0.0 Cash & Cash Equivalent 2.5 Credit Quality Ratings (%) AAA 10.8% AA 38.6% A 38.3% BBB 7.4% NR 2.5% Below Invest. Grade 0.0% Cash & Cash Equivalent 2.5% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Intermediate Municipal Fund - Class I
Shareholder Report [Line Items]
Class Name	CLASS: I
Trading Symbol	THMIX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Intermediate Municipal Fund Class I Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $52.00 0.50%
Expenses Paid, Amount	$ 52
Expense Ratio, Percent	0.50%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class I shares outperformed the ICE BofA 3-15 Year U.S. Municipal Securities Index (the “Index”) during the 12-month period ended September 30, 2024. The period began with municipal bond yields peaking in October of 2023, which marked the end of the Federal Reserve rate hiking cycle, before falling precipitously throughout the period and ending significantly lower. The backdrop of falling municipal bond yields boosted bond prices due to the inverse relationship between the two, which produced strong absolute returns for the asset class. However, the Fund’s relative performance was hampered during the period by individual bond selection. The Fund’s relative performance benefited from active management due to its longer duration and sector/quality returns from its higher weighting to revenue and A-rated bonds. Specifically, within the revenue sector and other utilities bonds were a large contributor to relative performance during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Intermediate Municipal Fund ICE BofA 3-15 Year U.S. Municipal Securities Index ICE BofA U.S. Municipal Securities Index 09/30/2014 10000.0017 10000 10000 10/31/2014 10048.8937 10047.8828 10061.0061 11/30/2014 10048.5287 10053.6678 10074.732 12/31/2014 10089.9482 10084.4301 10133.237 01/31/2015 10223.0878 10254.7365 10315.1349 02/28/2015 10130.8459 10156.2738 10213.0312 03/31/2015 10150.5675 10171.2054 10243.2441 04/30/2015 10113.573 10142.593 10191.582 05/31/2015 10076.1138 10095.8047 10157.4674 06/30/2015 10067.0303 10091.6614 10143.7215 07/31/2015 10122.3588 10164.9514 10223.9759 08/31/2015 10134.798 10178.2804 10246.5455 09/30/2015 10191.1979 10260.1697 10315.6951 10/31/2015 10233.7627 10309.2642 10359.774 11/30/2015 10269.4542 10336.704 10410.5357 12/31/2015 10333.0527 10403.1536 10493.2511 01/31/2016 10439.046 10545.9421 10609.5409 02/29/2016 10436.8555 10558.2157 10618.4247 03/31/2016 10470.6861 10572.4828 10665.2047 04/30/2016 10527.0759 10641.3168 10746.9397 05/31/2016 10546.9178 10632.3656 10780.454 06/30/2016 10699.0844 10781.0955 10955.589 07/31/2016 10675.0354 10791.4929 10949.7465 08/31/2016 10687.527 10807.5581 10974.9373 09/30/2016 10656.5139 10772.5352 10921.9146 10/31/2016 10573.3868 10684.1963 10819.6708 11/30/2016 10231.9734 10291.4401 10425.262 12/31/2016 10319.1883 10397.3686 10539.3308 01/31/2017 10332.501 10465.499 10592.9738 02/28/2017 10384.2823 10539.5316 10661.5031 03/31/2017 10405.4445 10563.688 10685.8535 04/30/2017 10479.7818 10656.2093 10762.9465 05/31/2017 10613.996 10805.9945 10922.1347 06/30/2017 10583.9958 10760.9261 10897.224 07/31/2017 10643.5026 10844.2226 10976.8981 08/31/2017 10710.4038 10935.1022 11069.4177 09/30/2017 10672.064 10880.3008 11027.4598 10/31/2017 10678.6879 10886.9849 11047.8085 11/30/2017 10632.9783 10795.4017 11000.3481 12/31/2017 10716.0141 10879.48 11110.0751 01/31/2018 10624.3898 10775.5841 10993.045 02/28/2018 10594.5068 10732.2746 10946.205 03/31/2018 10609.1491 10752.9521 10982.8206 04/30/2018 10578.6798 10716.9521 10940.1224 05/31/2018 10670.2424 10832.1835 11068.6574 06/30/2018 10685.6984 10844.8089 11080.8826 07/31/2018 10716.0794 10887.923 11107.1138 08/31/2018 10731.3775 10900.5093 11124.0611 09/30/2018 10676.992 10842.2682 11053.4109 10/31/2018 10622.9441 10780.9782 10973.8968 11/30/2018 10716.4887 10907.4279 11094.9286 12/31/2018 10802.3214 11037.0046 11225.6846 01/31/2019 10880.4566 11148.21 11309.9006 02/28/2019 10928.9461 11210.7117 11374.1081 03/31/2019 11046.7228 11343.3373 11556.5862 04/30/2019 11071.0217 11371.5979 11604.8669 05/31/2019 11197.978 11536.2365 11776.3203 06/30/2019 11247.2497 11586.5037 11826.3817 07/31/2019 11328.5601 11687.9371 11920.3619 08/31/2019 11465.4322 11824.3933 12108.5024 09/30/2019 11388.0554 11725.0707 12018.0237 10/31/2019 11397.1324 11746.7645 12032.5099 11/30/2019 11414.7037 11765.8003 12055.2997 12/31/2019 11439.965 11810.2043 12094.0362 01/31/2020 11625.4418 12006.387 12310.4889 02/29/2020 11764.7432 12123.3774 12480.4216 03/31/2020 11332.5754 11719.2465 12011.9411 04/30/2020 11206.2119 11604.3278 11828.8427 05/31/2020 11466.9902 11977.5009 12213.0072 06/30/2020 11590.2938 12060.0157 12331.8981 07/31/2020 11761.8809 12237.8661 12529.0824 08/31/2020 11729.9098 12208.4328 12486.8844 09/30/2020 11730.7519 12204.7586 12478.7409 10/31/2020 11698.2331 12179.5859 12453.9903 11/30/2020 11838.272 12323.1952 12644.4318 12/31/2020 11904.1073 12395.5471 12730.2285 01/31/2021 11978.4739 12465.5928 12814.1645 02/28/2021 11839.8759 12279.4948 12608.4364 03/31/2021 11897.7133 12337.4232 12685.0892 04/30/2021 11972.5854 12430.1791 12805.5408 05/31/2021 11997.3617 12459.2214 12861.4247 06/30/2021 12031.1336 12480.9153 12903.5827 07/31/2021 12105.7165 12575.5864 13000.3241 08/31/2021 12088.3498 12545.9186 12952.2436 09/30/2021 12020.8348 12456.0944 12854.4017 10/31/2021 11969.1877 12428.3028 12840.0155 11/30/2021 12043.8827 12499.9902 12944.6803 12/31/2021 12050.5141 12512.5375 12962.708 01/31/2022 11778.5054 12167.3123 12614.479 02/28/2022 11735.8025 12112.0809 12543.3886 03/31/2022 11429.2815 11777.5267 12161.105 04/30/2022 11201.0323 11497.6567 11801.7111 05/31/2022 11328.6485 11677.4615 11990.3119 06/30/2022 11235.5704 11554.9988 11760.3534 07/31/2022 11450.2017 11842.8819 12081.5509 08/31/2022 11289.0909 11611.2855 11774.1193 09/30/2022 11016.3584 11242.6075 11336.1319 10/31/2022 10958.9189 11202.2296 11235.8489 11/30/2022 11264.5785 11634.8946 11804.6324 12/31/2022 11312.0305 11681.9957 11792.3671 01/31/2023 11523.896 11983.4423 12154.9223 02/28/2023 11356.0049 11726.2824 11859.776 03/31/2023 11526.0286 11967.0254 12125.9499 04/30/2023 11522.7682 11938.2566 12111.7038 05/31/2023 11458.6081 11817.0447 12018.8841 06/30/2023 11535.1866 11902.6474 12128.6911 07/31/2023 11594.5364 11933.0188 12159.4442 08/31/2023 11503.7415 11829.2011 12012.0412 09/30/2023 11297.7041 11557.1486 11671.6555 10/31/2023 11243.0808 11480.6925 11525.4929 11/30/2023 11742.6099 12052.0418 12262.5884 12/31/2023 11957.4173 12314.205 12561.5363 01/31/2024 11938.4819 12277.4232 12533.8245 02/29/2024 11965.4788 12288.2896 12535.4652 03/31/2024 12001.3995 12276.5241 12522.8598 04/30/2024 11901.9395 12144.3676 12382.8399 05/31/2024 11892.8174 12061.032 12356.9688 06/30/2024 12038.7102 12227.9768 12555.7339 07/31/2024 12139.3191 12337.7359 12664.2203 08/31/2024 12212.6466 12462.583 12763.903 09/30/2024 12323.6381 12575.0392 12899.3409 Effective September 30, 2024, the Fund adopted the ICE BofA U.S. Municipal Securities Index as its broad-based securities market index that represents the overall applicable market in which the Fund invests, and the ICE BofA 3-15 Year U.S. Municipal Securities Index as an additional index that represents the market sectors which the Fund’s advisor believes are more representative of the Fund’s investment universe.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Intermediate Municipal Fund Class I 9.08% 1.59% 2.11% ICE BofA 3-15 Year U.S. Municipal Securities Index 8.81% 1.41% 2.32% ICE BofA U.S. Municipal Securities Index 10.52% 1.43% 2.58%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fim/THMIX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 1,020,500,000
Holdings Count | Holdings	479
Advisory Fees Paid, Amount	$ 4,500,000
Investment Company, Portfolio Turnover	29.65%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $1,020.5 Number of Holdings 479 Annual Portfolio Turnover 29.65% Total Advisory Fee $4.5
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) AAA 10.8 AA 38.6 A 38.3 BBB 7.4 NR 2.5 Below Invest. Grade 0.0 Cash & Cash Equivalent 2.5 Credit Quality Ratings (%) AAA 10.8% AA 38.6% A 38.3% BBB 7.4% NR 2.5% Below Invest. Grade 0.0% Cash & Cash Equivalent 2.5% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Strategic Municipal Income Fund Class A
Shareholder Report [Line Items]
Class Name	CLASS: A
Trading Symbol	TSSAX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Strategic Municipal Income Class A Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $85.00 0.81%
Expenses Paid, Amount	$ 85
Expense Ratio, Percent	0.81%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class A shares underperformed the ICE BofA U.S. Municipal Master Index (the “Index”) during the 12-month period ended September 30, 2024. The period began with municipal bond yields peaking in October of 2023, which marked the end of the Federal Reserve rate hiking cycle, before falling precipitously throughout the period and ending significantly lower. The backdrop of falling municipal bond yields boosted bond prices due to the inverse relationship between the two, producing strong absolute returns for the asset class. However, the Fund’s relative performance was hampered during the period by its shorter duration and yield curve positioning compared to its Index. The Fund’s relative performance benefited from active management with respect to its sector/quality returns thanks to its higher weighting to revenue and A-rated bonds. Specifically, within the revenue sector, healthcare and other utilities bonds were large contributors to relative performance during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Strategic Municipal Income Fund ICE BofA U.S. Municipal Securities Index 09/30/2014 9799.9956 10000 10/31/2014 9857.4932 10061.0061 11/30/2014 9864.4473 10074.732 12/31/2014 9921.2582 10133.237 01/31/2015 10068.0217 10315.1349 02/28/2015 9956.8147 10213.0312 03/31/2015 9987.7941 10243.2441 04/30/2015 9927.9932 10191.582 05/31/2015 9894.3807 10157.4674 06/30/2015 9881.1076 10143.7215 07/31/2015 9946.4047 10223.9759 08/31/2015 9959.5903 10246.5455 09/30/2015 10013.4377 10315.6951 10/31/2015 10041.3567 10359.774 11/30/2015 10056.2041 10410.5357 12/31/2015 10142.1928 10493.2511 01/31/2016 10239.7425 10609.5409 02/29/2016 10238.3272 10618.4247 03/31/2016 10275.7625 10665.2047 04/30/2016 10340.5151 10746.9397 05/31/2016 10377.6217 10780.454 06/30/2016 10522.0132 10955.589 07/31/2016 10497.9435 10949.7465 08/31/2016 10513.8189 10974.9373 09/30/2016 10477.3611 10921.9146 10/31/2016 10385.8471 10819.6708 11/30/2016 10038.5308 10425.262 12/31/2016 10103.1834 10539.3308 01/31/2017 10120.5866 10592.9738 02/28/2017 10162.4628 10661.5031 03/31/2017 10182.8871 10685.8535 04/30/2017 10245.0654 10762.9465 05/31/2017 10375.6593 10922.1347 06/30/2017 10348.6349 10897.224 07/31/2017 10403.8722 10976.8981 08/31/2017 10480.0094 11069.4177 09/30/2017 10453.1859 11027.4598 10/31/2017 10460.7266 11047.8085 11/30/2017 10427.3523 11000.3481 12/31/2017 10511.1439 11110.0751 01/31/2018 10427.8626 10993.045 02/28/2018 10401.2756 10946.205 03/31/2018 10422.4478 10982.8206 04/30/2018 10395.6426 10940.1224 05/31/2018 10480.4718 11068.6574 06/30/2018 10495.5486 11080.8826 07/31/2018 10517.3616 11107.1138 08/31/2018 10532.4985 11124.0611 09/30/2018 10491.1225 11053.4109 10/31/2018 10443.0451 10973.8968 11/30/2018 10516.2372 11094.9286 12/31/2018 10589.1171 11225.6846 01/31/2019 10654.5958 11309.9006 02/28/2019 10700.3578 11374.1081 03/31/2019 10809.5 11556.5862 04/30/2019 10840.4239 11604.8669 05/31/2019 10957.1775 11776.3203 06/30/2019 11002.7771 11826.3817 07/31/2019 11069.397 11920.3619 08/31/2019 11200.8328 12108.5024 09/30/2019 11129.214 12018.0237 10/31/2019 11136.8088 12032.5099 11/30/2019 11152.0367 12055.2997 12/31/2019 11181.24 12094.0362 01/31/2020 11349.038 12310.4889 02/29/2020 11490.1961 12480.4216 03/31/2020 11001.0155 12011.9411 04/30/2020 10834.4439 11828.8427 05/31/2020 11079.3 12213.0072 06/30/2020 11243.3342 12331.8981 07/31/2020 11437.2761 12529.0824 08/31/2020 11414.8915 12486.8844 09/30/2020 11414.3654 12478.7409 10/31/2020 11391.0382 12453.9903 11/30/2020 11525.0159 12644.4318 12/31/2020 11605.2375 12730.2285 01/31/2021 11684.5949 12814.1645 02/28/2021 11554.548 12608.4364 03/31/2021 11602.9795 12685.0892 04/30/2021 11681.699 12805.5408 05/31/2021 11706.8084 12861.4247 06/30/2021 11739.6861 12903.5827 07/31/2021 11817.7847 13000.3241 08/31/2021 11789.9633 12952.2436 09/30/2021 11717.1408 12854.4017 10/31/2021 11666.116 12840.0155 11/30/2021 11744.6122 12944.6803 12/31/2021 11746.3038 12962.708 01/31/2022 11473.1922 12614.479 02/28/2022 11423.3909 12543.3886 03/31/2022 11097.3417 12161.105 04/30/2022 10834.2224 11801.7111 05/31/2022 10932.7903 11990.3119 06/30/2022 10770.0877 11760.3534 07/31/2022 10992.5754 12081.5509 08/31/2022 10807.1759 11774.1193 09/30/2022 10459.442 11336.1319 10/31/2022 10360.7489 11235.8489 11/30/2022 10744.8999 11804.6324 12/31/2022 10779.8499 11792.3671 01/31/2023 11025.2379 12154.9223 02/28/2023 10842.4668 11859.776 03/31/2023 11012.7031 12125.9499 04/30/2023 11009.9793 12111.7038 05/31/2023 10928.7582 12018.8841 06/30/2023 11021.8443 12128.6911 07/31/2023 11068.0001 12159.4442 08/31/2023 10963.1167 12012.0412 09/30/2023 10722.4308 11671.6555 10/31/2023 10626.2302 11525.4929 11/30/2023 11188.8395 12262.5884 12/31/2023 11415.2031 12561.5363 01/31/2024 11383.5348 12533.8245 02/29/2024 11425.4513 12535.4652 03/31/2024 11491.4436 12522.8598 04/30/2024 11386.4934 12382.8399 05/31/2024 11395.6787 12356.9688 06/30/2024 11544.755 12555.7339 07/31/2024 11661.4135 12664.2203 08/31/2024 11754.0999 12763.903 09/30/2024 11838.235 12899.3409 Effective September 30, 2024, the name of the Fund’s broad-based securities market index was changed from the ICE BofA U.S. Municipal Master Index to the ICE BofA U.S. Municipal Securities Index.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Strategic Municipal Income Fund Class A (with sales charge) 8.22% 0.84% 1.70% Strategic Municipal Income Fund Class A (without sales charge) 10.41% 1.24% 1.91% ICE BofA U.S. Municipal Securities Index 10.52% 1.43% 2.58%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment and assumes the deduction of the maximum sales charge associated with that investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fsm/TSSAX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 322,300,000
Holdings Count | Holdings	258
Advisory Fees Paid, Amount	$ 1,600,000
Investment Company, Portfolio Turnover	23.43%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $322.3 Number of Holdings 258 Annual Portfolio Turnover 23.43% Total Advisory Fee $1.6
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) AAA 5.1 AA 23.5 A 37.1 BBB 17.6 NR 12.2 Below Invest. Grade 1.3 Cash & Cash Equivalent 3.1 Credit Quality Ratings (%) AAA 5.1% AA 23.5% A 37.1% BBB 17.6% NR 12.2% Below Invest. Grade 1.3% Cash & Cash Equivalent 3.1% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Strategic Municipal Income Fund Class C
Shareholder Report [Line Items]
Class Name	CLASS: C
Trading Symbol	TSSCX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Strategic Municipal Income Class C Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $134.00 1.28%
Expenses Paid, Amount	$ 134
Expense Ratio, Percent	1.28%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class C shares underperformed the ICE BofA U.S. Municipal Master Index (the “Index”) during the 12-month period ended September 30, 2024. The period began with municipal bond yields peaking in October of 2023, which marked the end of the Federal Reserve rate hiking cycle, before falling precipitously throughout the period and ending significantly lower. The backdrop of falling municipal bond yields boosted bond prices due to the inverse relationship between the two, producing strong absolute returns for the asset class. However, the Fund’s relative performance was hampered during the period by its shorter duration and yield curve positioning compared to its Index. The Fund’s relative performance benefited from active management with respect to its sector/quality returns thanks to its higher weighting to revenue and A-rated bonds. Specifically, within the revenue sector, healthcare and other utilities bonds were large contributors to relative performance during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Strategic Municipal Income Fund ICE BofA U.S. Municipal Securities Index 09/30/2014 10000.004 10000 10/31/2014 10056.0806 10061.0061 11/30/2014 10067.3154 10074.732 12/31/2014 10122.6636 10133.237 01/31/2015 10263.0079 10315.1349 02/28/2015 10154.0286 10213.0312 03/31/2015 10183.0202 10243.2441 04/30/2015 10119.6432 10191.582 05/31/2015 10076.2244 10157.4674 06/30/2015 10060.2607 10143.7215 07/31/2015 10130.825 10223.9759 08/31/2015 10141.6693 10246.5455 09/30/2015 10187.2466 10315.6951 10/31/2015 10219.7712 10359.774 11/30/2015 10232.3826 10410.5357 12/31/2015 10317.1782 10493.2511 01/31/2016 10406.9181 10609.5409 02/29/2016 10409.7782 10618.4247 03/31/2016 10445.1732 10665.2047 04/30/2016 10508.3533 10746.9397 05/31/2016 10543.348 10780.454 06/30/2016 10687.2749 10955.589 07/31/2016 10660.1602 10949.7465 08/31/2016 10673.5707 10974.9373 09/30/2016 10627.1999 10921.9146 10/31/2016 10538.6103 10819.6708 11/30/2016 10184.1152 10425.262 12/31/2016 10247.1157 10539.3308 01/31/2017 10262.1401 10592.9738 02/28/2017 10300.55 10661.5031 03/31/2017 10310.4526 10685.8535 04/30/2017 10375.8726 10762.9465 05/31/2017 10503.5715 10922.1347 06/30/2017 10471.9104 10897.224 07/31/2017 10523.2051 10976.8981 08/31/2017 10595.5719 11069.4177 09/30/2017 10564.0792 11027.4598 10/31/2017 10560.3164 11047.8085 11/30/2017 10529.3195 11000.3481 12/31/2017 10609.2875 11110.0751 01/31/2018 10520.775 10993.045 02/28/2018 10490.1913 10946.205 03/31/2018 10500.2484 10982.8206 04/30/2018 10476.4337 10940.1224 05/31/2018 10557.6152 11068.6574 06/30/2018 10568.7203 11080.8826 07/31/2018 10586.4392 11107.1138 08/31/2018 10597.523 11124.0611 09/30/2018 10551.893 11053.4109 10/31/2018 10499.4199 10973.8968 11/30/2018 10568.8751 11094.9286 12/31/2018 10637.8162 11225.6846 01/31/2019 10692.1195 11309.9006 02/28/2019 10734.174 11374.1081 03/31/2019 10839.2929 11556.5862 04/30/2019 10866.1128 11604.8669 05/31/2019 10985.9321 11776.3203 06/30/2019 11027.3643 11826.3817 07/31/2019 11089.6578 11920.3619 08/31/2019 11209.474 12108.5024 09/30/2019 11140.8131 12018.0237 10/31/2019 11144.0897 12032.5099 11/30/2019 11155.0956 12055.2997 12/31/2019 11172.4572 12094.0362 01/31/2020 11342.9938 12310.4889 02/29/2020 11472.3674 12480.4216 03/31/2020 10987.2158 12011.9411 04/30/2020 10809.57 11828.8427 05/31/2020 11049.3713 12213.0072 06/30/2020 11215.9453 12331.8981 07/31/2020 11404.6634 12529.0824 08/31/2020 11377.8472 12486.8844 09/30/2020 11365.5594 12478.7409 10/31/2020 11337.7906 12453.9903 11/30/2020 11466.6502 12644.4318 12/31/2020 11541.8285 12730.2285 01/31/2021 11623.5444 12814.1645 02/28/2021 11490.1556 12608.4364 03/31/2021 11533.68 12685.0892 04/30/2021 11599.898 12805.5408 05/31/2021 11627.6682 12861.4247 06/30/2021 11655.7513 12903.5827 07/31/2021 11728.5488 13000.3241 08/31/2021 11696.3397 12952.2436 09/30/2021 11619.6978 12854.4017 10/31/2021 11557.0303 12840.0155 11/30/2021 11637.8382 12944.6803 12/31/2021 11634.8989 12962.708 01/31/2022 11360.1181 12614.479 02/28/2022 11306.7897 12543.3886 03/31/2022 10980.038 12161.105 04/30/2022 10708.368 11801.7111 05/31/2022 10809.0226 11990.3119 06/30/2022 10644.2775 11760.3534 07/31/2022 10859.583 12081.5509 08/31/2022 10672.3879 11774.1193 09/30/2022 10317.786 11336.1319 10/31/2022 10216.3786 11235.8489 11/30/2022 10590.8855 11804.6324 12/31/2022 10621.032 11792.3671 01/31/2023 10858.3834 12154.9223 02/28/2023 10674.6328 11859.776 03/31/2023 10837.8292 12125.9499 04/30/2023 10830.9753 12111.7038 05/31/2023 10754.572 12018.8841 06/30/2023 10834.1028 12128.6911 07/31/2023 10875.144 12159.4442 08/31/2023 10767.8869 12012.0412 09/30/2023 10527.5626 11671.6555 10/31/2023 10436.9057 11525.4929 11/30/2023 10976.7049 12262.5884 12/31/2023 11201.9749 12561.5363 01/31/2024 11166.5289 12533.8245 02/29/2024 11195.5271 12535.4652 03/31/2024 11255.6881 12522.8598 04/30/2024 11148.6823 12382.8399 05/31/2024 11153.2467 12356.9688 06/30/2024 11302.7637 12555.7339 07/31/2024 11404.2916 12664.2203 08/31/2024 11490.3288 12763.903 09/30/2024 11576.1718 12899.3409 Effective September 30, 2024, the name of the Fund’s broad-based securities market index was changed from the ICE BofA U.S. Municipal Master Index to the ICE BofA U.S. Municipal Securities Index.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Strategic Municipal Income Fund Class C (with sales charge) 9.36% 0.77% 1.47% Strategic Municipal Income Fund Class C (without sales charge) 9.96% 0.77% 1.47% ICE BofA U.S. Municipal Securities Index 10.52% 1.43% 2.58%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fsm/TSSCX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 322,300,000
Holdings Count | Holdings	258
Advisory Fees Paid, Amount	$ 1,600,000
Investment Company, Portfolio Turnover	23.43%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $322.3 Number of Holdings 258 Annual Portfolio Turnover 23.43% Total Advisory Fee $1.6
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) AAA 5.1 AA 23.5 A 37.1 BBB 17.6 NR 12.2 Below Invest. Grade 1.3 Cash & Cash Equivalent 3.1 Credit Quality Ratings (%) AAA 5.1% AA 23.5% A 37.1% BBB 17.6% NR 12.2% Below Invest. Grade 1.3% Cash & Cash Equivalent 3.1% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Strategic Municipal Income Fund Class I
Shareholder Report [Line Items]
Class Name	CLASS: I
Trading Symbol	TSSIX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Strategic Municipal Income Class I Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $62.00 0.59%
Expenses Paid, Amount	$ 62
Expense Ratio, Percent	0.59%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class I shares outperformed the ICE BofA U.S. Municipal Master Index (the “Index”) during the 12-month period ended September 30, 2024. The period began with municipal bond yields peaking in October of 2023, which marked the end of the Federal Reserve rate hiking cycle, before falling precipitously throughout the period and ending significantly lower. The backdrop of falling municipal bond yields boosted bond prices due to the inverse relationship between the two, producing strong absolute returns for the asset class. However, the Fund’s relative performance was hampered during the period by its shorter duration and yield curve positioning compared to its Index. The Fund’s relative performance benefited from active management with respect to its sector/quality returns thanks to its higher weighting to revenue and A-rated bonds. Specifically, within the revenue sector, healthcare and other utilities bonds were large contributors to relative performance during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Strategic Municipal Income Fund ICE BofA U.S. Municipal Securities Index 09/30/2014 10000.004 10000 10/31/2014 10061.62 10061.0061 11/30/2014 10078.1053 10074.732 12/31/2014 10132.4536 10133.237 01/31/2015 10285.2826 10315.1349 02/28/2015 10174.2871 10213.0312 03/31/2015 10215.3607 10243.2441 04/30/2015 10157.2328 10191.582 05/31/2015 10119.0915 10157.4674 06/30/2015 10107.8654 10143.7215 07/31/2015 10183.8907 10223.9759 08/31/2015 10192.9061 10246.5455 09/30/2015 10250.187 10315.6951 10/31/2015 10288.0959 10359.774 11/30/2015 10305.6109 10410.5357 12/31/2015 10396.512 10493.2511 01/31/2016 10492.5788 10609.5409 02/29/2016 10500.784 10618.4247 03/31/2016 10542.0392 10665.2047 04/30/2016 10611.1669 10746.9397 05/31/2016 10652.189 10780.454 06/30/2016 10803.02 10955.589 07/31/2016 10781.277 10949.7465 08/31/2016 10800.5019 10974.9373 09/30/2016 10759.0879 10921.9146 10/31/2016 10675.0426 10819.6708 11/30/2016 10321.1955 10425.262 12/31/2016 10390.3626 10539.3308 01/31/2017 10411.0119 10592.9738 02/28/2017 10455.8057 10661.5031 03/31/2017 10471.8046 10685.8535 04/30/2017 10544.57 10762.9465 05/31/2017 10673.8528 10922.1347 06/30/2017 10655.0583 10897.224 07/31/2017 10713.8679 10976.8981 08/31/2017 10794.2016 11069.4177 09/30/2017 10768.5876 11027.4598 10/31/2017 10771.274 11047.8085 11/30/2017 10746.0329 11000.3481 12/31/2017 10827.2045 11110.0751 01/31/2018 10750.725 10993.045 02/28/2018 10725.1895 10946.205 03/31/2018 10741.833 10982.8206 04/30/2018 10716.1906 10940.1224 05/31/2018 10805.594 11068.6574 06/30/2018 10830.3347 11080.8826 07/31/2018 10854.8662 11107.1138 08/31/2018 10872.5933 11124.0611 09/30/2018 10831.9089 11053.4109 10/31/2018 10784.3736 10973.8968 11/30/2018 10861.8169 11094.9286 12/31/2018 10939.0469 11225.6846 01/31/2019 11001.3049 11309.9006 02/28/2019 11050.3985 11374.1081 03/31/2019 11165.1264 11556.5862 04/30/2019 11199.0737 11604.8669 05/31/2019 11321.7471 11776.3203 06/30/2019 11370.9032 11826.3817 07/31/2019 11449.3101 11920.3619 08/31/2019 11579.7719 12108.5024 09/30/2019 11507.8784 12018.0237 10/31/2019 11525.4198 12032.5099 11/30/2019 11543.2501 12055.2997 12/31/2019 11568.0676 12094.0362 01/31/2020 11751.2939 12310.4889 02/29/2020 11891.7436 12480.4216 03/31/2020 11387.9335 12011.9411 04/30/2020 11217.6695 11828.8427 05/31/2020 11473.1337 12213.0072 06/30/2020 11652.6244 12331.8981 07/31/2020 11847.9101 12529.0824 08/31/2020 11834.6485 12486.8844 09/30/2020 11828.5666 12478.7409 10/31/2020 11806.6268 12453.9903 11/30/2020 11947.557 12644.4318 12/31/2020 12032.9217 12730.2285 01/31/2021 12125.178 12814.1645 02/28/2021 11992.442 12608.4364 03/31/2021 12044.9138 12685.0892 04/30/2021 12120.9409 12805.5408 05/31/2021 12157.0704 12861.4247 06/30/2021 12193.377 12903.5827 07/31/2021 12268.854 13000.3241 08/31/2021 12242.3279 12952.2436 09/30/2021 12176.8711 12854.4017 10/31/2021 12118.3184 12840.0155 11/30/2021 12209.9057 12944.6803 12/31/2021 12213.9507 12962.708 01/31/2022 11932.6006 12614.479 02/28/2022 11882.843 12543.3886 03/31/2022 11538.329 12161.105 04/30/2022 11267.0116 11801.7111 05/31/2022 11371.5207 11990.3119 06/30/2022 11212.4254 11760.3534 07/31/2022 11437.8386 12081.5509 08/31/2022 11255.2281 11774.1193 09/30/2022 10887.5497 11336.1319 10/31/2022 10786.9159 11235.8489 11/30/2022 11188.5579 11804.6324 12/31/2022 11227.0176 11792.3671 01/31/2023 11484.6054 12154.9223 02/28/2023 11296.29 11859.776 03/31/2023 11475.6612 12125.9499 04/30/2023 11474.9213 12111.7038 05/31/2023 11400.7123 12018.8841 06/30/2023 11491.5165 12128.6911 07/31/2023 11541.7808 12159.4442 08/31/2023 11434.6341 12012.0412 09/30/2023 11185.8644 11671.6555 10/31/2023 11096.0402 11525.4929 11/30/2023 11676.3197 12262.5884 12/31/2023 11914.5902 12561.5363 01/31/2024 11883.7932 12533.8245 02/29/2024 11929.6294 12535.4652 03/31/2024 12000.7525 12522.8598 04/30/2024 11893.4128 12382.8399 05/31/2024 11905.2491 12356.9688 06/30/2024 12063.0771 12555.7339 07/31/2024 12187.1827 12664.2203 08/31/2024 12286.2933 12763.903 09/30/2024 12385.0716 12899.3409 Effective September 30, 2024, the name of the Fund’s broad-based securities market index was changed from the ICE BofA U.S. Municipal Master Index to the ICE BofA U.S. Municipal Securities Index.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year Strategic Municipal Income Fund Class I 10.72% 1.48% 2.16% ICE BofA U.S. Municipal Securities Index 10.52% 1.43% 2.58%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fsm/TSSIX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 322,300,000
Holdings Count | Holdings	258
Advisory Fees Paid, Amount	$ 1,600,000
Investment Company, Portfolio Turnover	23.43%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $322.3 Number of Holdings 258 Annual Portfolio Turnover 23.43% Total Advisory Fee $1.6
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) AAA 5.1 AA 23.5 A 37.1 BBB 17.6 NR 12.2 Below Invest. Grade 1.3 Cash & Cash Equivalent 3.1 Credit Quality Ratings (%) AAA 5.1% AA 23.5% A 37.1% BBB 17.6% NR 12.2% Below Invest. Grade 1.3% Cash & Cash Equivalent 3.1% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg California Limited Term Municipal Fund - Class A
Shareholder Report [Line Items]
Class Name	CLASS: A
Trading Symbol	LTCAX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg California Limited Term Municipal Fund Class A Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $76.00 0.74%
Expenses Paid, Amount	$ 76
Expense Ratio, Percent	0.74%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class A shares underperformed the ICE BofA 1-10 Year U.S. Municipal Securities Index (the “Index”) during the 12-month period ended September 30, 2024. The period began with municipal bond yields peaking in October of 2023, which marked the end of the Federal Reserve rate hiking cycle, before falling precipitously throughout the period and ending significantly lower. The backdrop of falling municipal bond yields boosted bond prices due to the inverse relationship between the two, producing strong absolute returns for the asset class. However, the Fund’s underperformance during the period was driven by its shorter duration and yield curve positioning compared to the Index. The Fund’s relative performance did benefit from its focus on California municipal bonds as opposed to the Index’s national focus. As a result, sector/quality returns and security selection contributed to relative performance during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg California Limited Term Municipal Fund ICE BofA 1-10 Year U.S. Municipal Securities Index ICE BofA U.S. Municipal Securities Index 09/30/2014 9850.537 10000 10000 10/31/2014 9884.1781 10031.0861 10061.0061 11/30/2014 9874.4802 10036.9203 10074.732 12/31/2014 9878.7275 10037.6328 10133.237 01/31/2015 10003.8153 10163.3576 10315.1349 02/28/2015 9937.5664 10102.8334 10213.0312 03/31/2015 9941.4751 10101.9427 10243.2441 04/30/2015 9916.928 10091.7885 10191.582 05/31/2015 9884.6198 10054.6901 10157.4674 06/30/2015 9881.753 10061.5931 10143.7215 07/31/2015 9928.1519 10113.7892 10223.9759 08/31/2015 9940.3698 10123.0972 10246.5455 09/30/2015 9988.0512 10181.2611 10315.6951 10/31/2015 10006.3065 10221.0316 10359.774 11/30/2015 10010.4443 10219.8737 10410.5357 12/31/2015 10042.9203 10250.3808 10493.2511 01/31/2016 10126.0567 10357.5787 10609.5409 02/29/2016 10145.3279 10380.4701 10618.4247 03/31/2016 10126.7548 10364.6599 10665.2047 04/30/2016 10166.7593 10412.4469 10746.9397 05/31/2016 10147.9436 10394.6771 10780.454 06/30/2016 10224.601 10485.9311 10955.589 07/31/2016 10227.5479 10509.4015 10949.7465 08/31/2016 10230.3402 10512.5636 10974.9373 09/30/2016 10219.4639 10481.3439 10921.9146 10/31/2016 10156.5234 10435.7837 10819.6708 11/30/2016 9889.1685 10188.5204 10425.262 12/31/2016 9943.3175 10245.66 10539.3308 01/31/2017 9998.2922 10316.8283 10592.9738 02/28/2017 10039.8678 10379.8912 10661.5031 03/31/2017 10043.4243 10387.2396 10685.8535 04/30/2017 10092.1187 10452.3956 10762.9465 05/31/2017 10184.585 10545.3865 10922.1347 06/30/2017 10159.5584 10509.8914 10897.224 07/31/2017 10200.4356 10573.934 10976.8981 08/31/2017 10255.9842 10635.349 11069.4177 09/30/2017 10208.472 10584.3109 11027.4598 10/31/2017 10197.4813 10581.0598 11047.8085 11/30/2017 10112.9453 10488.0688 11000.3481 12/31/2017 10147.0005 10535.2323 11110.0751 01/31/2018 10106.9286 10494.8828 10993.045 02/28/2018 10076.4019 10474.2182 10946.205 03/31/2018 10066.8316 10475.3761 10982.8206 04/30/2018 10035.9838 10443.1321 10940.1224 05/31/2018 10116.0561 10529.888 11068.6574 06/30/2018 10129.3868 10554.65 11080.8826 07/31/2018 10149.3266 10595.7566 11107.1138 08/31/2018 10154.6422 10601.3236 11124.0611 09/30/2018 10114.9649 10553.8929 11053.4109 10/31/2018 10090.4144 10524.6328 10973.8968 11/30/2018 10141.838 10616.4213 11094.9286 12/31/2018 10200.2527 10713.0196 11225.6846 01/31/2019 10251.4549 10805.1198 11309.9006 02/28/2019 10281.6217 10853.9757 11374.1081 03/31/2019 10333.012 10937.3469 11556.5862 04/30/2019 10331.8682 10949.2825 11604.8669 05/31/2019 10406.1934 11066.0111 11776.3203 06/30/2019 10435.4213 11111.3932 11826.3817 07/31/2019 10494.296 11194.319 11920.3619 08/31/2019 10537.8172 11268.4267 12108.5024 09/30/2019 10482.2446 11192.2704 12018.0237 10/31/2019 10501.9809 11224.8261 12032.5099 11/30/2019 10506.8995 11243.7093 12055.2997 12/31/2019 10526.4752 11278.67 12094.0362 01/31/2020 10614.6495 11411.0752 12310.4889 02/29/2020 10659.3724 11478.9924 12480.4216 03/31/2020 10457.804 11208.2587 12011.9411 04/30/2020 10417.0383 11168.7109 11828.8427 05/31/2020 10606.2413 11448.9307 12213.0072 06/30/2020 10624.9629 11498.7218 12331.8981 07/31/2020 10688.7506 11617.7663 12529.0824 08/31/2020 10674.8934 11604.8954 12486.8844 09/30/2020 10684.4016 11606.3651 12478.7409 10/31/2020 10662.335 11585.9676 12453.9903 11/30/2020 10710.6493 11664.3953 12644.4318 12/31/2020 10727.8026 11708.3968 12730.2285 01/31/2021 10744.5408 11755.4267 12814.1645 02/28/2021 10663.1993 11644.3096 12608.4364 03/31/2021 10688.0224 11679.6266 12685.0892 04/30/2021 10713.78 11734.3612 12805.5408 05/31/2021 10716.2657 11746.5195 12861.4247 06/30/2021 10703.9454 11755.8721 12903.5827 07/31/2021 10737.5627 11818.8903 13000.3241 08/31/2021 10739.2902 11802.1003 12952.2436 09/30/2021 10694.5643 11744.9162 12854.4017 10/31/2021 10672.5639 11724.6079 12840.0155 11/30/2021 10690.4179 11758.8114 12944.6803 12/31/2021 10684.0133 11765.1355 12962.708 01/31/2022 10489.5355 11516.7143 12614.479 02/28/2022 10453.6482 11477.4782 12543.3886 03/31/2022 10258.1932 11243.0413 12161.105 04/30/2022 10105.2112 11063.3835 11801.7111 05/31/2022 10219.8292 11210.4855 11990.3119 06/30/2022 10177.0032 11159.1802 11760.3534 07/31/2022 10316.5438 11355.0045 12081.5509 08/31/2022 10204.399 11175.5694 11774.1193 09/30/2022 10005.6189 10912.5404 11336.1319 10/31/2022 9989.5927 10893.5681 11235.8489 11/30/2022 10181.9016 11188.4403 11804.6324 12/31/2022 10207.3088 11222.5102 11792.3671 01/31/2023 10344.7579 11436.9951 12154.9223 02/28/2023 10213.3464 11232.0409 11859.776 03/31/2023 10352.2708 11425.1485 12125.9499 04/30/2023 10331.814 11387.1594 12111.7038 05/31/2023 10271.2641 11297.3305 12018.8841 06/30/2023 10324.6464 11365.8713 12128.6911 07/31/2023 10354.1052 11388.0947 12159.4442 08/31/2023 10318.3044 11332.8702 12012.0412 09/30/2023 10194.7636 11153.6577 11671.6555 10/31/2023 10177.9609 11126.4908 11525.4929 11/30/2023 10486.8027 11522.2813 12262.5884 12/31/2023 10633.06 11703.5424 12561.5363 01/31/2024 10608.4069 11680.6955 12533.8245 02/29/2024 10616.9911 11690.627 12535.4652 03/31/2024 10633.4701 11680.3837 12522.8598 04/30/2024 10559.8464 11593.6278 12382.8399 05/31/2024 10518.6514 11540.6301 12356.9688 06/30/2024 10618.478 11666.8448 12555.7339 07/31/2024 10694.0948 11771.5932 12664.2203 08/31/2024 10811.068 11895.1358 12763.903 09/30/2024 10878.7079 11981.8917 12899.3409 Effective September 30, 2024, the Fund changed its benchmark to the ICE BofA U.S. Municipal Securities Index, a broad-based securities market index that represents the overall applicable market in which the Fund invests.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year California Limited Term Municipal Fund Class A (with sales charge) 4.30% 0.44% 0.85% California Limited Term Municipal Fund Class A (without sales charge) 6.71% 0.75% 1.00% ICE BofA 1-10 Year U.S. Municipal Securities Index 7.43% 1.37% 1.82% ICE BofA U.S. Municipal Securities Index 10.52% 1.43% 2.58%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment and assumes the deduction of the maximum sales charge associated with that investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fca/LTCAX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 273,400,000
Holdings Count | Holdings	197
Advisory Fees Paid, Amount	$ 1,200,000
Investment Company, Portfolio Turnover	46.36%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $273.4 Number of Holdings 197 Annual Portfolio Turnover 46.36% Total Advisory Fee $1.2
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) AAA 12.9 AA 51.6 A 24.8 BBB 8.6 NR 1.0 Below Invest. Grade 0.0 Cash & Cash Equivalent 1.1 Credit Quality Ratings (%) AAA 12.9% AA 51.6% A 24.8% BBB 8.6% NR 1.0% Below Invest. Grade 0.0% Cash & Cash Equivalent 1.1% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg California Limited Term Municipal Fund - Class C
Shareholder Report [Line Items]
Class Name	CLASS: C
Trading Symbol	LTCCX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg California Limited Term Municipal Fund Class C Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $105.00 1.02%
Expenses Paid, Amount	$ 105
Expense Ratio, Percent	1.02%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class C shares underperformed the ICE BofA 1-10 Year U.S. Municipal Securities Index (the “Index”) during the 12-month period ended September 30, 2024. The period began with municipal bond yields peaking in October of 2023, which marked the end of the Federal Reserve rate hiking cycle, before falling precipitously throughout the period and ending significantly lower. The backdrop of falling municipal bond yields boosted bond prices due to the inverse relationship between the two, producing strong absolute returns for the asset class. However, the Fund’s underperformance during the period was driven by its shorter duration and yield curve positioning compared to the Index. The Fund’s relative performance did benefit from its focus on California municipal bonds as opposed to the Index’s national focus. As a result, sector/quality returns and security selection contributed to relative performance during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg California Limited Term Municipal Fund ICE BofA 1-10 Year U.S. Municipal Securities Index ICE BofA U.S. Municipal Securities Index 09/30/2014 10000.0047 10000 10000 10/31/2014 10031.9088 10031.0861 10061.0061 11/30/2014 10019.9487 10036.9203 10074.732 12/31/2014 10029.2836 10037.6328 10133.237 01/31/2015 10146.85 10163.3576 10315.1349 02/28/2015 10077.7923 10102.8334 10213.0312 03/31/2015 10079.6144 10101.9427 10243.2441 04/30/2015 10052.8195 10091.7885 10191.582 05/31/2015 10018.1156 10054.6901 10157.4674 06/30/2015 10013.3138 10061.5931 10143.7215 07/31/2015 10058.3646 10113.7892 10223.9759 08/31/2015 10068.8526 10123.0972 10246.5455 09/30/2015 10115.3475 10181.2611 10315.6951 10/31/2015 10131.6877 10221.0316 10359.774 11/30/2015 10133.8095 10219.8737 10410.5357 12/31/2015 10164.5183 10250.3808 10493.2511 01/31/2016 10246.4872 10357.5787 10609.5409 02/29/2016 10263.9733 10380.4701 10618.4247 03/31/2016 10243.0805 10364.6599 10665.2047 04/30/2016 10281.4748 10412.4469 10746.9397 05/31/2016 10260.3366 10394.6771 10780.454 06/30/2016 10335.7145 10485.9311 10955.589 07/31/2016 10343.9419 10509.4015 10949.7465 08/31/2016 10344.6277 10512.5636 10974.9373 09/30/2016 10324.1723 10481.3439 10921.9146 10/31/2016 10258.4734 10435.7837 10819.6708 11/30/2016 9986.6055 10188.5204 10425.262 12/31/2016 10039.2217 10245.66 10539.3308 01/31/2017 10092.647 10316.8283 10592.9738 02/28/2017 10132.7371 10379.8912 10661.5031 03/31/2017 10134.2857 10387.2396 10685.8535 04/30/2017 10188.7738 10452.3956 10762.9465 05/31/2017 10272.3784 10545.3865 10922.1347 06/30/2017 10244.9764 10509.8914 10897.224 07/31/2017 10283.8789 10573.934 10976.8981 08/31/2017 10337.4497 10635.349 11069.4177 09/30/2017 10287.2297 10584.3109 11027.4598 10/31/2017 10273.8214 10581.0598 11047.8085 11/30/2017 10186.4623 10488.0688 11000.3481 12/31/2017 10225.9529 10535.2323 11110.0751 01/31/2018 10175.893 10494.8828 10993.045 02/28/2018 10143.1569 10474.2182 10946.205 03/31/2018 10138.7821 10475.3761 10982.8206 04/30/2018 10105.5633 10443.1321 10940.1224 05/31/2018 10176.2918 10529.888 11068.6574 06/30/2018 10187.4541 10554.65 11080.8826 07/31/2018 10212.635 10595.7566 11107.1138 08/31/2018 10208.0468 10601.3236 11124.0611 09/30/2018 10165.988 10553.8929 11053.4109 10/31/2018 10138.9792 10524.6328 10973.8968 11/30/2018 10188.3316 10616.4213 11094.9286 12/31/2018 10244.6042 10713.0196 11225.6846 01/31/2019 10293.6049 10805.1198 11309.9006 02/28/2019 10321.6865 10853.9757 11374.1081 03/31/2019 10370.7512 10937.3469 11556.5862 04/30/2019 10367.3397 10949.2825 11604.8669 05/31/2019 10447.1297 11066.0111 11776.3203 06/30/2019 10466.4666 11111.3932 11826.3817 07/31/2019 10530.5404 11194.319 11920.3619 08/31/2019 10571.5137 11268.4267 12108.5024 09/30/2019 10505.6468 11192.2704 12018.0237 10/31/2019 10522.7927 11224.8261 12032.5099 11/30/2019 10532.8229 11243.7093 12055.2997 12/31/2019 10542.1112 11278.67 12094.0362 01/31/2020 10635.6781 11411.0752 12310.4889 02/29/2020 10670.3888 11478.9924 12480.4216 03/31/2020 10466.288 11208.2587 12011.9411 04/30/2020 10430.8098 11168.7109 11828.8427 05/31/2020 10609.7994 11448.9307 12213.0072 06/30/2020 10626.0749 11498.7218 12331.8981 07/31/2020 10687.2342 11617.7663 12529.0824 08/31/2020 10670.8489 11604.8954 12486.8844 09/30/2020 10677.8782 11606.3651 12478.7409 10/31/2020 10653.2431 11585.9676 12453.9903 11/30/2020 10706.7573 11664.3953 12644.4318 12/31/2020 10713.5755 11708.3968 12730.2285 01/31/2021 10727.7438 11755.4267 12814.1645 02/28/2021 10644.2916 11644.3096 12608.4364 03/31/2021 10666.5269 11679.6266 12685.0892 04/30/2021 10689.745 11734.3612 12805.5408 05/31/2021 10689.6763 11746.5195 12861.4247 06/30/2021 10674.9283 11755.8721 12903.5827 07/31/2021 10705.8875 11818.8903 13000.3241 08/31/2021 10705.0538 11802.1003 12952.2436 09/30/2021 10658.0342 11744.9162 12854.4017 10/31/2021 10633.5808 11724.6079 12840.0155 11/30/2021 10648.898 11758.8114 12944.6803 12/31/2021 10639.9712 11765.1355 12962.708 01/31/2022 10443.9395 11516.7143 12614.479 02/28/2022 10405.9998 11477.4782 12543.3886 03/31/2022 10209.0682 11243.0413 12161.105 04/30/2022 10054.6144 11063.3835 11801.7111 05/31/2022 10166.1869 11210.4855 11990.3119 06/30/2022 10121.2924 11159.1802 11760.3534 07/31/2022 10257.5349 11355.0045 12081.5509 08/31/2022 10143.6953 11175.5694 11774.1193 09/30/2022 9943.9416 10912.5404 11336.1319 10/31/2022 9925.6703 10893.5681 11235.8489 11/30/2022 10114.304 11188.4403 11804.6324 12/31/2022 10137.1423 11222.5102 11792.3671 01/31/2023 10271.111 11436.9951 12154.9223 02/28/2023 10146.4765 11232.0409 11859.776 03/31/2023 10273.9323 11425.1485 12125.9499 04/30/2023 10251.3025 11387.1594 12111.7038 05/31/2023 10188.8638 11297.3305 12018.8841 06/30/2023 10239.4173 11365.8713 12128.6911 07/31/2023 10266.1791 11388.0947 12159.4442 08/31/2023 10228.2795 11332.8702 12012.0412 09/30/2023 10111.5901 11153.6577 11671.6555 10/31/2023 10084.5345 11126.4908 11525.4929 11/30/2023 10387.969 11522.2813 12262.5884 12/31/2023 10530.2896 11703.5424 12561.5363 01/31/2024 10511.4587 11680.6955 12533.8245 02/29/2024 10509.4927 11690.627 12535.4652 03/31/2024 10531.426 11680.3837 12522.8598 04/30/2024 10456.2228 11593.6278 12382.8399 05/31/2024 10404.7764 11540.6301 12356.9688 06/30/2024 10501.0671 11666.8448 12555.7339 07/31/2024 10573.295 11771.5932 12664.2203 08/31/2024 10686.3404 11895.1358 12763.903 09/30/2024 10750.7106 11981.8917 12899.3409 Effective September 30, 2024, the Fund changed its benchmark to the ICE BofA U.S. Municipal Securities Index, a broad-based securities market index that represents the overall applicable market in which the Fund invests.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year California Limited Term Municipal Fund Class C (with sales charge) 5.80% 0.46% 0.73% California Limited Term Municipal Fund Class C (without sales charge) 6.32% 0.46% 0.73% ICE BofA 1-10 Year U.S. Municipal Securities Index 7.43% 1.37% 1.82% ICE BofA U.S. Municipal Securities Index 10.52% 1.43% 2.58%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fca/LTCCX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 273,400,000
Holdings Count | Holdings	197
Advisory Fees Paid, Amount	$ 1,200,000
Investment Company, Portfolio Turnover	46.36%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $273.4 Number of Holdings 197 Annual Portfolio Turnover 46.36% Total Advisory Fee $1.2
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) AAA 12.9 AA 51.6 A 24.8 BBB 8.6 NR 1.0 Below Invest. Grade 0.0 Cash & Cash Equivalent 1.1 Credit Quality Ratings (%) AAA 12.9% AA 51.6% A 24.8% BBB 8.6% NR 1.0% Below Invest. Grade 0.0% Cash & Cash Equivalent 1.1% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg California Limited Term Municipal Fund - Class C2
Shareholder Report [Line Items]
Class Name	CLASS: C2
Trading Symbol	LTCQX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg California Limited Term Municipal Fund Class C2 Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C2 $105.00 1.02%
Expenses Paid, Amount	$ 105
Expense Ratio, Percent	1.02%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class C2 shares underperformed the ICE BofA 1-10 Year U.S. Municipal Securities Index (the “Index”) during the 12-month period ended September 30, 2024. The period began with municipal bond yields peaking in October of 2023, which marked the end of the Federal Reserve rate hiking cycle, before falling precipitously throughout the period and ending significantly lower. The backdrop of falling municipal bond yields boosted bond prices due to the inverse relationship between the two, producing strong absolute returns for the asset class. However, the Fund’s underperformance during the period was driven by its shorter duration and yield curve positioning compared to the Index. The Fund’s relative performance did benefit from its focus on California municipal bonds as opposed to the Index’s national focus. As a result, sector/quality returns and security selection contributed to relative performance during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg California Limited Term Municipal Fund ICE BofA 1-10 Year U.S. Municipal Securities Index ICE BofA U.S. Municipal Securities Index 09/30/2020 10000.0005 10000 10000 10/31/2020 9977.2187 9982.4256 9980.1658 11/30/2020 10020.0804 10049.9987 10132.7786 12/31/2020 10033.9554 10087.9101 10201.5329 01/31/2021 10047.6047 10128.4309 10268.796 02/28/2021 9969.7752 10032.6929 10103.9332 03/31/2021 9990.9173 10063.1219 10165.3599 04/30/2021 10013.0557 10110.281 10261.8853 05/31/2021 10013.0113 10120.7565 10306.6686 06/30/2021 9997.5445 10128.8147 10340.4525 07/31/2021 10026.555 10183.111 10417.9775 08/31/2021 10025.8032 10168.6447 10379.4475 09/30/2021 9981.7793 10119.3752 10301.0406 10/31/2021 9958.8958 10101.8775 10289.5121 11/30/2021 9973.2543 10131.3472 10373.3866 12/31/2021 9964.9368 10136.796 10387.8333 01/31/2022 9781.3102 9922.7573 10108.7755 02/28/2022 9745.7878 9888.9516 10051.8062 03/31/2022 9561.4235 9686.9616 9745.4583 04/30/2022 9416.9377 9532.1691 9457.4535 05/31/2022 9512.9146 9658.9117 9608.5911 06/30/2022 9478.2361 9614.7072 9424.3109 07/31/2022 9605.844 9783.4287 9681.7067 08/31/2022 9499.2468 9628.8281 9435.3424 09/30/2022 9304.8307 9402.2033 9084.3555 10/31/2022 9295.0978 9385.8569 9003.9925 11/30/2022 9471.7568 9639.9176 9459.7944 12/31/2022 9485.7472 9669.2721 9449.9655 01/31/2023 9618.6269 9854.0715 9740.5038 02/28/2023 9494.495 9677.4837 9503.9845 03/31/2023 9621.2914 9843.8645 9717.2864 04/30/2023 9600.1062 9811.1332 9705.8701 05/31/2023 9541.6418 9733.737 9631.4878 06/30/2023 9589.0024 9792.7914 9719.4831 07/31/2023 9614.077 9811.9391 9744.1275 08/31/2023 9578.6032 9764.3578 9626.0041 09/30/2023 9461.8412 9609.9491 9353.2317 10/31/2023 9444.0488 9586.5422 9236.1024 11/30/2023 9728.1627 9927.5537 9826.7834 12/31/2023 9861.4522 10083.7276 10066.3492 01/31/2024 9836.2901 10064.0428 10044.1419 02/29/2024 9842.0864 10072.5997 10045.4567 03/31/2024 9855.0262 10063.7742 10035.3552 04/30/2024 9784.6111 9989.0256 9923.1485 05/31/2024 9744.153 9943.363 9902.4163 06/30/2024 9834.3374 10052.1091 10061.6993 07/31/2024 9902.0023 10142.36 10148.6363 08/31/2024 10007.8857 10248.8038 10228.5183 09/30/2024 10068.171 10323.5523 10337.0532 Effective September 30, 2024, the Fund changed its benchmark to the ICE BofA U.S. Municipal Securities Index, a broad-based securities market index that represents the overall applicable market in which the Fund invests.
Average Annual Return [Table Text Block]	Annual Performance 1 Year California Limited Term Municipal Fund Class C2 (with sales charge) 5.76% California Limited Term Municipal Fund Class C2 (without sales charge) 6.41% ICE BofA 1-10 Year U.S. Municipal Securities Index 7.43% ICE BofA U.S. Municipal Securities Index 10.52%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 273,400,000
Holdings Count | Holdings	197
Advisory Fees Paid, Amount	$ 1,200,000
Investment Company, Portfolio Turnover	46.36%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $273.4 Number of Holdings 197 Annual Portfolio Turnover 46.36% Total Advisory Fee $1.2
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) AAA 12.9 AA 51.6 A 24.8 BBB 8.6 NR 1.0 Below Invest. Grade 0.0 Cash & Cash Equivalent 1.1 Credit Quality Ratings (%) AAA 12.9% AA 51.6% A 24.8% BBB 8.6% NR 1.0% Below Invest. Grade 0.0% Cash & Cash Equivalent 1.1% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg California Limited Term Municipal Fund - Class I
Shareholder Report [Line Items]
Class Name	CLASS: I
Trading Symbol	LTCIX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg California Limited Term Municipal Fund Class I Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $51.00 0.49%
Expenses Paid, Amount	$ 51
Expense Ratio, Percent	0.49%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class I shares underperformed the ICE BofA 1-10 Year U.S. Municipal Securities Index (the “Index”) during the 12-month period ended September 30, 2024. The period began with municipal bond yields peaking in October of 2023, which marked the end of the Federal Reserve rate hiking cycle, before falling precipitously throughout the period and ending significantly lower. The backdrop of falling municipal bond yields boosted bond prices due to the inverse relationship between the two, producing strong absolute returns for the asset class. However, the Fund’s underperformance during the period was driven by its shorter duration and yield curve positioning compared to the Index. The Fund’s relative performance did benefit from its focus on California municipal bonds as opposed to the Index’s national focus. As a result, sector/quality returns and security selection contributed to relative performance during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg California Limited Term Municipal Fund ICE BofA 1-10 Year U.S. Municipal Securities Index ICE BofA U.S. Municipal Securities Index 09/30/2014 10000.0047 10000 10000 10/31/2014 10037.0305 10031.0861 10061.0061 11/30/2014 10029.9622 10036.9203 10074.732 12/31/2014 10044.4078 10037.6328 10133.237 01/31/2015 10166.94 10163.3576 10315.1349 02/28/2015 10102.0581 10102.8334 10213.0312 03/31/2015 10108.6791 10101.9427 10243.2441 04/30/2015 10093.4982 10091.7885 10191.582 05/31/2015 10063.2171 10054.6901 10157.4674 06/30/2015 10062.8531 10061.5931 10143.7215 07/31/2015 10105.4088 10113.7892 10223.9759 08/31/2015 10120.713 10123.0972 10246.5455 09/30/2015 10171.7585 10181.2611 10315.6951 10/31/2015 10200.4557 10221.0316 10359.774 11/30/2015 10207.3772 10219.8737 10410.5357 12/31/2015 10235.8476 10250.3808 10493.2511 01/31/2016 10323.2794 10357.5787 10609.5409 02/29/2016 10345.5071 10380.4701 10618.4247 03/31/2016 10336.7099 10364.6599 10665.2047 04/30/2016 10380.132 10412.4469 10746.9397 05/31/2016 10356.3266 10394.6771 10780.454 06/30/2016 10444.5452 10485.9311 10955.589 07/31/2016 10450.2809 10509.4015 10949.7465 08/31/2016 10455.8856 10512.5636 10974.9373 09/30/2016 10439.8416 10481.3439 10921.9146 10/31/2016 10385.7325 10435.7837 10819.6708 11/30/2016 10107.8307 10188.5204 10425.262 12/31/2016 10165.8027 10245.66 10539.3308 01/31/2017 10224.599 10316.8283 10592.9738 02/28/2017 10269.4371 10379.8912 10661.5031 03/31/2017 10275.653 10387.2396 10685.8535 04/30/2017 10335.4544 10452.3956 10762.9465 05/31/2017 10425.0617 10545.3865 10922.1347 06/30/2017 10401.8855 10509.8914 10897.224 07/31/2017 10446.2016 10573.934 10976.8981 08/31/2017 10505.5818 10635.349 11069.4177 09/30/2017 10459.2323 10584.3109 11027.4598 10/31/2017 10450.5136 10581.0598 11047.8085 11/30/2017 10366.4192 10488.0688 11000.3481 12/31/2017 10411.5505 10535.2323 11110.0751 01/31/2018 10365.5551 10494.8828 10993.045 02/28/2018 10343.8018 10474.2182 10946.205 03/31/2018 10335.9066 10475.3761 10982.8206 04/30/2018 10306.3315 10443.1321 10940.1224 05/31/2018 10382.9355 10529.888 11068.6574 06/30/2018 10406.3295 10554.65 11080.8826 07/31/2018 10428.893 10595.7566 11107.1138 08/31/2018 10428.8564 10601.3236 11124.0611 09/30/2018 10390.77 10553.8929 11053.4109 10/31/2018 10367.8476 10524.6328 10973.8968 11/30/2018 10422.8856 10616.4213 11094.9286 12/31/2018 10493.0021 10713.0196 11225.6846 01/31/2019 10548.0206 10805.1198 11309.9006 02/28/2019 10581.1944 10853.9757 11374.1081 03/31/2019 10628.6426 10937.3469 11556.5862 04/30/2019 10637.6425 10949.2825 11604.8669 05/31/2019 10716.5586 11066.0111 11776.3203 06/30/2019 10741.2508 11111.3932 11826.3817 07/31/2019 10811.7323 11194.319 11920.3619 08/31/2019 10858.6107 11268.4267 12108.5024 09/30/2019 10795.5969 11192.2704 12018.0237 10/31/2019 10818.134 11224.8261 12032.5099 11/30/2019 10833.2343 11243.7093 12055.2997 12/31/2019 10847.7575 11278.67 12094.0362 01/31/2020 10948.7158 11411.0752 12310.4889 02/29/2020 10989.0458 11478.9924 12480.4216 03/31/2020 10783.6712 11208.2587 12011.9411 04/30/2020 10751.8161 11168.7109 11828.8427 05/31/2020 10941.1814 11448.9307 12213.0072 06/30/2020 10962.7239 11498.7218 12331.8981 07/31/2020 11030.8122 11617.7663 12529.0824 08/31/2020 11018.8747 11604.8954 12486.8844 09/30/2020 11038.9185 11606.3651 12478.7409 10/31/2020 11010.5058 11585.9676 12453.9903 11/30/2020 11070.6246 11664.3953 12644.4318 12/31/2020 11090.6702 11708.3968 12730.2285 01/31/2021 11102.2958 11755.4267 12814.1645 02/28/2021 11020.4528 11644.3096 12608.4364 03/31/2021 11056.4713 11679.6266 12685.0892 04/30/2021 11085.3182 11734.3612 12805.5408 05/31/2021 11082.1975 11746.5195 12861.4247 06/30/2021 11071.7382 11755.8721 12903.5827 07/31/2021 11116.9242 11818.8903 13000.3241 08/31/2021 11112.9944 11802.1003 12952.2436 09/30/2021 11069.0228 11744.9162 12854.4017 10/31/2021 11048.6279 11724.6079 12840.0155 11/30/2021 11069.3783 11758.8114 12944.6803 12/31/2021 11065.1195 11765.1355 12962.708 01/31/2022 10866.1957 11516.7143 12614.479 02/28/2022 10831.121 11477.4782 12543.3886 03/31/2022 10630.9774 11243.0413 12161.105 04/30/2022 10474.7199 11063.3835 11801.7111 05/31/2022 10595.6554 11210.4855 11990.3119 06/30/2022 10553.4555 11159.1802 11760.3534 07/31/2022 10700.2953 11355.0045 12081.5509 08/31/2022 10594.5378 11175.5694 11774.1193 09/30/2022 10382.4361 10912.5404 11336.1319 10/31/2022 10368.0209 10893.5681 11235.8489 11/30/2022 10569.6128 11188.4403 11804.6324 12/31/2022 10598.2254 11222.5102 11792.3671 01/31/2023 10743.1013 11436.9951 12154.9223 02/28/2023 10617.0872 11232.0409 11859.776 03/31/2023 10755.2411 11425.1485 12125.9499 04/30/2023 10736.2441 11387.1594 12111.7038 05/31/2023 10675.6689 11297.3305 12018.8841 06/30/2023 10733.3197 11365.8713 12128.6911 07/31/2023 10766.2232 11388.0947 12159.4442 08/31/2023 10731.318 11332.8702 12012.0412 09/30/2023 10613.5699 11153.6577 11671.6555 10/31/2023 10589.9293 11126.4908 11525.4929 11/30/2023 10913.2323 11522.2813 12262.5884 12/31/2023 11067.6901 11703.5424 12561.5363 01/31/2024 11052.8913 11680.6955 12533.8245 02/29/2024 11055.509 11690.627 12535.4652 03/31/2024 11083.5629 11680.3837 12522.8598 04/30/2024 11009.2263 11593.6278 12382.8399 05/31/2024 10960.1099 11540.6301 12356.9688 06/30/2024 11066.3394 11666.8448 12555.7339 07/31/2024 11156.1017 11771.5932 12664.2203 08/31/2024 11280.334 11895.1358 12763.903 09/30/2024 11353.1476 11981.8917 12899.3409 Effective September 30, 2024, the Fund changed its benchmark to the ICE BofA U.S. Municipal Securities Index, a broad-based securities market index that represents the overall applicable market in which the Fund invests.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year California Limited Term Municipal Fund Class I 6.97% 1.01% 1.28% ICE BofA 1-10 Year U.S. Municipal Securities Index 7.43% 1.37% 1.82% ICE BofA U.S. Municipal Securities Index 10.52% 1.43% 2.58%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fca/LTCIX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 273,400,000
Holdings Count | Holdings	197
Advisory Fees Paid, Amount	$ 1,200,000
Investment Company, Portfolio Turnover	46.36%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $273.4 Number of Holdings 197 Annual Portfolio Turnover 46.36% Total Advisory Fee $1.2
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) AAA 12.9 AA 51.6 A 24.8 BBB 8.6 NR 1.0 Below Invest. Grade 0.0 Cash & Cash Equivalent 1.1 Credit Quality Ratings (%) AAA 12.9% AA 51.6% A 24.8% BBB 8.6% NR 1.0% Below Invest. Grade 0.0% Cash & Cash Equivalent 1.1% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg New Mexico Intermediate Municipal Fund - Class A
Shareholder Report [Line Items]
Class Name	CLASS: A
Trading Symbol	THNMX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg New Mexico Intermediate Municipal Fund Class A Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $102.00 0.99%
Expenses Paid, Amount	$ 102
Expense Ratio, Percent	0.99%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class A shares underperformed the ICE BofA 3-15 Year U.S. Municipal Securities Index (the “Index”) during the 12-month period ended September 30, 2024. The period began with municipal bond yields peaking in October of 2023, which marked the end of the Federal Reserve rate hiking cycle, before falling precipitously throughout the period and ending significantly lower. The backdrop of falling municipal bond yields boosted bond prices due to the inverse relationship between the two, producing strong absolute returns for the asset class. However, the Fund’s relative underperformance during the period was driven by its shorter duration and its focus on New Mexico bonds. The Fund’s single-state focus and the impact on relative performance were evident in individual bond selection. The Fund’s relative performance benefited from active management with respect to its sector/quality returns thanks to the Fund’s higher weighting to revenue and AA-rated bonds. Specifically, within the revenue sector, single-family housing and education bonds were positive contributors to relative performance during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg New Mexico Intermediate Municipal Fund ICE BofA 3-15 Year U.S. Municipal Securities Index ICE BofA U.S. Municipal Securities Index 09/30/2014 9798.2696 10000 10000 10/31/2014 9864.7876 10047.8828 10061.0061 11/30/2014 9859.6133 10053.6678 10074.732 12/31/2014 9888.1288 10084.4301 10133.237 01/31/2015 10010.4044 10254.7365 10315.1349 02/28/2015 9937.954 10156.2738 10213.0312 03/31/2015 9966.1244 10171.2054 10243.2441 04/30/2015 9936.8662 10142.593 10191.582 05/31/2015 9907.4504 10095.8047 10157.4674 06/30/2015 9890.408 10091.6614 10143.7215 07/31/2015 9936.432 10164.9514 10223.9759 08/31/2015 9953.712 10178.2804 10246.5455 09/30/2015 10008.8566 10260.1697 10315.6951 10/31/2015 10034.617 10309.2642 10359.774 11/30/2015 10053.5603 10336.704 10410.5357 12/31/2015 10101.3728 10403.1536 10493.2511 01/31/2016 10201.2134 10545.9421 10609.5409 02/29/2016 10197.8244 10558.2157 10618.4247 03/31/2016 10208.6193 10572.4828 10665.2047 04/30/2016 10264.865 10641.3168 10746.9397 05/31/2016 10260.7508 10632.3656 10780.454 06/30/2016 10369.2385 10781.0955 10955.589 07/31/2016 10342.1588 10791.4929 10949.7465 08/31/2016 10352.9389 10807.5581 10974.9373 09/30/2016 10320.2212 10772.5352 10921.9146 10/31/2016 10255.5365 10684.1963 10819.6708 11/30/2016 10002.3396 10291.4401 10425.262 12/31/2016 10059.9963 10397.3686 10539.3308 01/31/2017 10072.6875 10465.499 10592.9738 02/28/2017 10116.8755 10539.5316 10661.5031 03/31/2017 10129.4996 10563.688 10685.8535 04/30/2017 10187.9931 10656.2093 10762.9465 05/31/2017 10277.0094 10805.9945 10922.1347 06/30/2017 10251.7233 10760.9261 10897.224 07/31/2017 10295.0203 10844.2226 10976.8981 08/31/2017 10337.7918 10935.1022 11069.4177 09/30/2017 10280.7537 10880.3008 11027.4598 10/31/2017 10269.4987 10886.9849 11047.8085 11/30/2017 10212.5153 10795.4017 11000.3481 12/31/2017 10264.2804 10879.48 11110.0751 01/31/2018 10200.0553 10775.5841 10993.045 02/28/2018 10192.0239 10732.2746 10946.205 03/31/2018 10198.568 10752.9521 10982.8206 04/30/2018 10182.9787 10716.9521 10940.1224 05/31/2018 10260.8366 10832.1835 11068.6574 06/30/2018 10290.4833 10844.8089 11080.8826 07/31/2018 10319.8237 10887.923 11107.1138 08/31/2018 10340.043 10900.5093 11124.0611 09/30/2018 10305.165 10842.2682 11053.4109 10/31/2018 10270.6093 10780.9782 10973.8968 11/30/2018 10339.7542 10907.4279 11094.9286 12/31/2018 10407.7795 11037.0046 11225.6846 01/31/2019 10468.2886 11148.21 11309.9006 02/28/2019 10498.7764 11210.7117 11374.1081 03/31/2019 10583.3526 11343.3373 11556.5862 04/30/2019 10596.5091 11371.5979 11604.8669 05/31/2019 10681.4604 11536.2365 11776.3203 06/30/2019 10718.6598 11586.5037 11826.3817 07/31/2019 10787.7245 11687.9371 11920.3619 08/31/2019 10897.0151 11824.3933 12108.5024 09/30/2019 10835.8879 11725.0707 12018.0237 10/31/2019 10846.6073 11746.7645 12032.5099 11/30/2019 10857.365 11765.8003 12055.2997 12/31/2019 10875.2139 11810.2043 12094.0362 01/31/2020 11015.9369 12006.387 12310.4889 02/29/2020 11109.0805 12123.3774 12480.4216 03/31/2020 10848.6265 11719.2465 12011.9411 04/30/2020 10759.3313 11604.3278 11828.8427 05/31/2020 10997.186 11977.5009 12213.0072 06/30/2020 11069.4931 12060.0157 12331.8981 07/31/2020 11190.2834 12237.8661 12529.0824 08/31/2020 11138.3962 12208.4328 12486.8844 09/30/2020 11144.1721 12204.7586 12478.7409 10/31/2020 11116.5482 12179.5859 12453.9903 11/30/2020 11214.0699 12323.1952 12644.4318 12/31/2020 11251.5592 12395.5471 12730.2285 01/31/2021 11280.7702 12465.5928 12814.1645 02/28/2021 11137.7217 12279.4948 12608.4364 03/31/2021 11175.2232 12337.4232 12685.0892 04/30/2021 11238.6939 12430.1791 12805.5408 05/31/2021 11251.6616 12459.2214 12861.4247 06/30/2021 11265.4382 12480.9153 12903.5827 07/31/2021 11329.0128 12575.5864 13000.3241 08/31/2021 11308.896 12545.9186 12952.2436 09/30/2021 11239.0222 12456.0944 12854.4017 10/31/2021 11219.1001 12428.3028 12840.0155 11/30/2021 11250.6131 12499.9902 12944.6803 12/31/2021 11262.6953 12512.5375 12962.708 01/31/2022 10996.8566 12167.3123 12614.479 02/28/2022 10977.5908 12112.0809 12543.3886 03/31/2022 10703.2612 11777.5267 12161.105 04/30/2022 10505.8048 11497.6567 11801.7111 05/31/2022 10620.7906 11677.4615 11990.3119 06/30/2022 10533.5386 11554.9988 11760.3534 07/31/2022 10742.0764 11842.8819 12081.5509 08/31/2022 10560.0429 11611.2855 11774.1193 09/30/2022 10285.371 11242.6075 11336.1319 10/31/2022 10247.3144 11202.2296 11235.8489 11/30/2022 10508.7023 11634.8946 11804.6324 12/31/2022 10556.2613 11681.9957 11792.3671 01/31/2023 10750.2045 11983.4423 12154.9223 02/28/2023 10570.8912 11726.2824 11859.776 03/31/2023 10723.6392 11967.0254 12125.9499 04/30/2023 10697.6536 11938.2566 12111.7038 05/31/2023 10612.1523 11817.0447 12018.8841 06/30/2023 10666.1114 11902.6474 12128.6911 07/31/2023 10703.1042 11933.0188 12159.4442 08/31/2023 10602.4226 11829.2011 12012.0412 09/30/2023 10424.4278 11557.1486 11671.6555 10/31/2023 10368.3259 11480.6925 11525.4929 11/30/2023 10800.2019 12052.0418 12262.5884 12/31/2023 10970.8209 12314.205 12561.5363 01/31/2024 10923.1699 12277.4232 12533.8245 02/29/2024 10938.1977 12288.2896 12535.4652 03/31/2024 10961.0053 12276.5241 12522.8598 04/30/2024 10887.8498 12144.3676 12382.8399 05/31/2024 10831.6124 12061.032 12356.9688 06/30/2024 10935.4482 12227.9768 12555.7339 07/31/2024 11012.7146 12337.7359 12664.2203 08/31/2024 11081.9269 12462.583 12763.903 09/30/2024 11142.7321 12575.0392 12899.3409 Effective September 30, 2024, the Fund changed its benchmark to the ICE BofA U.S. Municipal Securities Index, a broad-based securities market index that represents the overall applicable market in which the Fund invests.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year New Mexico Intermediate Municipal Fund Class A (with sales charge) 4.71% 0.16% 1.09% New Mexico Intermediate Municipal Fund Class A (without sales charge) 6.89% 0.56% 1.29% ICE BofA 3-15 Year U.S. Municipal Securities Index 8.81% 1.41% 2.32% ICE BofA U.S. Municipal Securities Index 10.52% 1.43% 2.58%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment and assumes the deduction of the maximum sales charge associated with that investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fnm/THNMX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 94,500,000
Holdings Count | Holdings	94
Advisory Fees Paid, Amount	$ 500,000
Investment Company, Portfolio Turnover	19.49%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $94.5 Number of Holdings 94 Annual Portfolio Turnover 19.49% Total Advisory Fee $0.5
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) AAA 40.6 AA 43.5 A 5.2 BBB 8.3 NR 0.4 Below Invest. Grade 0.0 Cash & Cash Equivalent 2.0 Credit Quality Ratings (%) AAA 40.6% AA 43.5% A 5.2% BBB 8.3% NR 0.4% Below Invest. Grade 0.0% Cash & Cash Equivalent 2.0% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg New Mexico Intermediate Municipal Fund - Class D
Shareholder Report [Line Items]
Class Name	CLASS: D
Trading Symbol	THNDX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg New Mexico Intermediate Municipal Fund Class D Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class D $128.00 1.24%
Expenses Paid, Amount	$ 128
Expense Ratio, Percent	1.24%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class D shares underperformed the ICE BofA 3-15 Year U.S. Municipal Securities Index (the “Index”) during the 12-month period ended September 30, 2024. The period began with municipal bond yields peaking in October of 2023, which marked the end of the Federal Reserve rate hiking cycle, before falling precipitously throughout the period and ending significantly lower. The backdrop of falling municipal bond yields boosted bond prices due to the inverse relationship between the two, producing strong absolute returns for the asset class. However, the Fund’s relative underperformance during the period was driven by its shorter duration and its focus on New Mexico bonds. The Fund’s single-state focus and the impact on relative performance were evident in individual bond selection. The Fund’s relative performance benefited from active management with respect to its sector/quality returns thanks to the Fund’s higher weighting to revenue and AA-rated bonds. Specifically, within the revenue sector, single-family housing and education bonds were positive contributors to relative performance during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg New Mexico Intermediate Municipal Fund ICE BofA 3-15 Year U.S. Municipal Securities Index ICE BofA U.S. Municipal Securities Index 09/30/2014 10000.0019 10000 10000 10/31/2014 10058.2405 10047.8828 10061.0061 11/30/2014 10050.879 10053.6678 10074.732 12/31/2014 10077.8584 10084.4301 10133.237 01/31/2015 10207.7693 10254.7365 10315.1349 02/28/2015 10124.6446 10156.2738 10213.0312 03/31/2015 10151.2593 10171.2054 10243.2441 04/30/2015 10126.9418 10142.593 10191.582 05/31/2015 10095.2894 10095.8047 10157.4674 06/30/2015 10076.3008 10091.6614 10143.7215 07/31/2015 10121.5299 10164.9514 10223.9759 08/31/2015 10130.0355 10178.2804 10246.5455 09/30/2015 10184.4104 10260.1697 10315.6951 10/31/2015 10215.9302 10309.2642 10359.774 11/30/2015 10233.0827 10336.704 10410.5357 12/31/2015 10272.012 10403.1536 10493.2511 01/31/2016 10371.3819 10545.9421 10609.5409 02/29/2016 10373.488 10558.2157 10618.4247 03/31/2016 10382.3813 10572.4828 10665.2047 04/30/2016 10437.4773 10641.3168 10746.9397 05/31/2016 10431.1663 10632.3656 10780.454 06/30/2016 10539.5051 10781.0955 10955.589 07/31/2016 10509.8192 10791.4929 10949.7465 08/31/2016 10510.8939 10807.5581 10974.9373 09/30/2016 10483.5175 10772.5352 10921.9146 10/31/2016 10415.6535 10684.1963 10819.6708 11/30/2016 10156.601 10291.4401 10425.262 12/31/2016 10213.7272 10397.3686 10539.3308 01/31/2017 10224.4818 10465.499 10592.9738 02/28/2017 10259.7005 10539.5316 10661.5031 03/31/2017 10278.8093 10563.688 10685.8535 04/30/2017 10328.174 10656.2093 10762.9465 05/31/2017 10423.9685 10805.9945 10922.1347 06/30/2017 10396.8999 10760.9261 10897.224 07/31/2017 10430.8595 10844.2226 10976.8981 08/31/2017 10479.7273 10935.1022 11069.4177 09/30/2017 10419.7867 10880.3008 11027.4598 10/31/2017 10406.188 10886.9849 11047.8085 11/30/2017 10338.5223 10795.4017 11000.3481 12/31/2017 10396.587 10879.48 11110.0751 01/31/2018 10329.3893 10775.5841 10993.045 02/28/2018 10320.3254 10732.2746 10946.205 03/31/2018 10323.6115 10752.9521 10982.8206 04/30/2018 10305.6425 10716.9521 10940.1224 05/31/2018 10382.1123 10832.1835 11068.6574 06/30/2018 10409.8237 10844.8089 11080.8826 07/31/2018 10437.1206 10887.923 11107.1138 08/31/2018 10455.2626 10900.5093 11124.0611 09/30/2018 10418.0437 10842.2682 11053.4109 10/31/2018 10372.7951 10780.9782 10973.8968 11/30/2018 10440.3748 10907.4279 11094.9286 12/31/2018 10514.7758 11037.0046 11225.6846 01/31/2019 10573.5559 11148.21 11309.9006 02/28/2019 10602.2195 11210.7117 11374.1081 03/31/2019 10677.1335 11343.3373 11556.5862 04/30/2019 10688.0838 11371.5979 11604.8669 05/31/2019 10779.4864 11536.2365 11776.3203 06/30/2019 10814.6976 11586.5037 11826.3817 07/31/2019 10873.5274 11687.9371 11920.3619 08/31/2019 10989.1209 11824.3933 12108.5024 09/30/2019 10924.9129 11725.0707 12018.0237 10/31/2019 10925.0198 11746.7645 12032.5099 11/30/2019 10941.6014 11765.8003 12055.2997 12/31/2019 10957.0625 11810.2043 12094.0362 01/31/2020 11096.1051 12006.387 12310.4889 02/29/2020 11187.367 12123.3774 12480.4216 03/31/2020 10914.4722 11719.2465 12011.9411 04/30/2020 10822.5126 11604.3278 11828.8427 05/31/2020 11067.8156 11977.5009 12213.0072 06/30/2020 11130.0538 12060.0157 12331.8981 07/31/2020 11249.1636 12237.8661 12529.0824 08/31/2020 11202.9075 12208.4328 12486.8844 09/30/2020 11206.4802 12204.7586 12478.7409 10/31/2020 11176.2202 12179.5859 12453.9903 11/30/2020 11271.7657 12323.1952 12644.4318 12/31/2020 11306.904 12395.5471 12730.2285 01/31/2021 11333.7338 12465.5928 12814.1645 02/28/2021 11187.8476 12279.4948 12608.4364 03/31/2021 11214.7048 12337.4232 12685.0892 04/30/2021 11284.3041 12430.1791 12805.5408 05/31/2021 11294.7858 12459.2214 12861.4247 06/30/2021 11306.3737 12480.9153 12903.5827 07/31/2021 11359.3153 12575.5864 13000.3241 08/31/2021 11336.7465 12545.9186 12952.2436 09/30/2021 11272.7947 12456.0944 12854.4017 10/31/2021 11250.4673 12428.3028 12840.0155 11/30/2021 11279.7628 12499.9902 12944.6803 12/31/2021 11281.066 12512.5375 12962.708 01/31/2022 11020.8508 12167.3123 12614.479 02/28/2022 10999.4522 12112.0809 12543.3886 03/31/2022 10722.4996 11777.5267 12161.105 04/30/2022 10522.6786 11497.6567 11801.7111 05/31/2022 10627.0732 11677.4615 11990.3119 06/30/2022 10546.0843 11554.9988 11760.3534 07/31/2022 10743.9613 11842.8819 12081.5509 08/31/2022 10568.1352 11611.2855 11774.1193 09/30/2022 10282.8222 11242.6075 11336.1319 10/31/2022 10242.5906 11202.2296 11235.8489 11/30/2022 10510.2413 11634.8946 11804.6324 12/31/2022 10555.5389 11681.9957 11792.3671 01/31/2023 10738.5237 11983.4423 12154.9223 02/28/2023 10557.3652 11726.2824 11859.776 03/31/2023 10707.677 11967.0254 12125.9499 04/30/2023 10688.1133 11938.2566 12111.7038 05/31/2023 10591.8982 11817.0447 12018.8841 06/30/2023 10652.1657 11902.6474 12128.6911 07/31/2023 10686.8334 11933.0188 12159.4442 08/31/2023 10575.5191 11829.2011 12012.0412 09/30/2023 10404.4639 11557.1486 11671.6555 10/31/2023 10346.3521 11480.6925 11525.4929 11/30/2023 10766.1294 12052.0418 12262.5884 12/31/2023 10933.9322 12314.205 12561.5363 01/31/2024 10892.8537 12277.4232 12533.8245 02/29/2024 10905.6854 12288.2896 12535.4652 03/31/2024 10926.1152 12276.5241 12522.8598 04/30/2024 10842.2785 12144.3676 12382.8399 05/31/2024 10792.7569 12061.032 12356.9688 06/30/2024 10893.925 12227.9768 12555.7339 07/31/2024 10968.5427 12337.7359 12664.2203 08/31/2024 11035.128 12462.583 12763.903 09/30/2024 11084.548 12575.0392 12899.3409 Effective September 30, 2024, the Fund changed its benchmark to the ICE BofA U.S. Municipal Securities Index, a broad-based securities market index that represents the overall applicable market in which the Fund invests.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year New Mexico Intermediate Municipal Fund Class D 6.54% 0.29% 1.03% ICE BofA 3-15 Year U.S. Municipal Securities Index 8.81% 1.41% 2.32% ICE BofA U.S. Municipal Securities Index 10.52% 1.43% 2.58%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fnm/THNDX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 94,500,000
Holdings Count | Holdings	94
Advisory Fees Paid, Amount	$ 500,000
Investment Company, Portfolio Turnover	19.49%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $94.5 Number of Holdings 94 Annual Portfolio Turnover 19.49% Total Advisory Fee $0.5
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) AAA 40.6 AA 43.5 A 5.2 BBB 8.3 NR 0.4 Below Invest. Grade 0.0 Cash & Cash Equivalent 2.0 Credit Quality Ratings (%) AAA 40.6% AA 43.5% A 5.2% BBB 8.3% NR 0.4% Below Invest. Grade 0.0% Cash & Cash Equivalent 2.0% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg New Mexico Intermediate Municipal Fund - Class I
Shareholder Report [Line Items]
Class Name	CLASS: I
Trading Symbol	THNIX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg New Mexico Intermediate Municipal Fund Class I Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $69.00 0.67%
Expenses Paid, Amount	$ 69
Expense Ratio, Percent	0.67%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class I shares underperformed the ICE BofA 3-15 Year U.S. Municipal Securities Index (the “Index”) during the 12-month period ended September 30, 2024. The period began with municipal bond yields peaking in October of 2023, which marked the end of the Federal Reserve rate hiking cycle, before falling precipitously throughout the period and ending significantly lower. The backdrop of falling municipal bond yields boosted bond prices due to the inverse relationship between the two, producing strong absolute returns for the asset class. However, the Fund’s relative underperformance during the period was driven by its shorter duration and its focus on New Mexico bonds. The Fund’s single-state focus and the impact on relative performance were evident in individual bond selection. The Fund’s relative performance benefited from active management with respect to its sector/quality returns thanks to the Fund’s higher weighting to revenue and AA-rated bonds. Specifically, within the revenue sector, single-family housing and education bonds were positive contributors to relative performance during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg New Mexico Intermediate Municipal Fund ICE BofA 3-15 Year U.S. Municipal Securities Index ICE BofA U.S. Municipal Securities Index 09/30/2014 9999.9977 10000 10000 10/31/2014 10070.7789 10047.8828 10061.0061 11/30/2014 10068.2833 10053.6678 10074.732 12/31/2014 10100.3741 10084.4301 10133.237 01/31/2015 10228.0694 10254.7365 10315.1349 02/28/2015 10156.4081 10156.2738 10213.0312 03/31/2015 10187.8524 10171.2054 10243.2441 04/30/2015 10160.4289 10142.593 10191.582 05/31/2015 10133.073 10095.8047 10157.4674 06/30/2015 10118.3274 10091.6614 10143.7215 07/31/2015 10175.6655 10164.9514 10223.9759 08/31/2015 10188.7542 10178.2804 10246.5455 09/30/2015 10248.0875 10260.1697 10315.6951 10/31/2015 10284.9888 10309.2642 10359.774 11/30/2015 10307.295 10336.704 10410.5357 12/31/2015 10351.6525 10403.1536 10493.2511 01/31/2016 10456.9908 10545.9421 10609.5409 02/29/2016 10463.9414 10558.2157 10618.4247 03/31/2016 10477.932 10572.4828 10665.2047 04/30/2016 10538.5241 10641.3168 10746.9397 05/31/2016 10529.6328 10632.3656 10780.454 06/30/2016 10643.8296 10781.0955 10955.589 07/31/2016 10626.6325 10791.4929 10949.7465 08/31/2016 10632.9651 10807.5581 10974.9373 09/30/2016 10609.8475 10772.5352 10921.9146 10/31/2016 10546.2629 10684.1963 10819.6708 11/30/2016 10280.9191 10291.4401 10425.262 12/31/2016 10350.8735 10397.3686 10539.3308 01/31/2017 10358.9709 10465.499 10592.9738 02/28/2017 10407.0447 10539.5316 10661.5031 03/31/2017 10430.7536 10563.688 10685.8535 04/30/2017 10485.9461 10656.2093 10762.9465 05/31/2017 10588.4656 10805.9945 10922.1347 06/30/2017 10557.3867 10760.9261 10897.224 07/31/2017 10604.9943 10844.2226 10976.8981 08/31/2017 10652.0931 10935.1022 11069.4177 09/30/2017 10595.7316 10880.3008 11027.4598 10/31/2017 10595.0848 10886.9849 11047.8085 11/30/2017 10531.1906 10795.4017 11000.3481 12/31/2017 10595.5608 10879.48 11110.0751 01/31/2018 10532.1878 10775.5841 10993.045 02/28/2018 10518.1944 10732.2746 10946.205 03/31/2018 10527.3991 10752.9521 10982.8206 04/30/2018 10513.7803 10716.9521 10940.1224 05/31/2018 10604.9128 10832.1835 11068.6574 06/30/2018 10637.9838 10844.8089 11080.8826 07/31/2018 10670.7924 10887.923 11107.1138 08/31/2018 10686.136 10900.5093 11124.0611 09/30/2018 10661.209 10842.2682 11053.4109 10/31/2018 10619.9816 10780.9782 10973.8968 11/30/2018 10694.1831 10907.4279 11094.9286 12/31/2018 10775.6069 11037.0046 11225.6846 01/31/2019 10832.852 11148.21 11309.9006 02/28/2019 10875.2563 11210.7117 11374.1081 03/31/2019 10957.4171 11343.3373 11556.5862 04/30/2019 10973.7708 11371.5979 11604.8669 05/31/2019 11073.0017 11536.2365 11776.3203 06/30/2019 11106.0346 11586.5037 11826.3817 07/31/2019 11180.2709 11687.9371 11920.3619 08/31/2019 11304.6577 11824.3933 12108.5024 09/30/2019 11235.4016 11725.0707 12018.0237 10/31/2019 11249.3336 11746.7645 12032.5099 11/30/2019 11271.6614 11765.8003 12055.2997 12/31/2019 11293.0294 11810.2043 12094.0362 01/31/2020 11433.4438 12006.387 12310.4889 02/29/2020 11532.78 12123.3774 12480.4216 03/31/2020 11264.9603 11719.2465 12011.9411 04/30/2020 11175.2079 11604.3278 11828.8427 05/31/2020 11434.1577 11977.5009 12213.0072 06/30/2020 11503.8425 12060.0157 12331.8981 07/31/2020 11632.6087 12237.8661 12529.0824 08/31/2020 11581.7599 12208.4328 12486.8844 09/30/2020 11590.8811 12204.7586 12478.7409 10/31/2020 11565.1279 12179.5859 12453.9903 11/30/2020 11669.5717 12323.1952 12644.4318 12/31/2020 11720.2877 12395.5471 12730.2285 01/31/2021 11753.7888 12465.5928 12814.1645 02/28/2021 11607.5232 12279.4948 12608.4364 03/31/2021 11641.0333 12337.4232 12685.0892 04/30/2021 11718.7976 12430.1791 12805.5408 05/31/2021 11726.6587 12459.2214 12861.4247 06/30/2021 11744.1967 12480.9153 12903.5827 07/31/2021 11813.6924 12575.5864 13000.3241 08/31/2021 11795.8988 12545.9186 12952.2436 09/30/2021 11734.8088 12456.0944 12854.4017 10/31/2021 11708.444 12428.3028 12840.0155 11/30/2021 11753.2195 12499.9902 12944.6803 12/31/2021 11760.252 12512.5375 12962.708 01/31/2022 11494.4139 12167.3123 12614.479 02/28/2022 11477.0837 12112.0809 12543.3886 03/31/2022 11193.3622 11777.5267 12161.105 04/30/2022 10989.7749 11497.6567 11801.7111 05/31/2022 11104.1862 11677.4615 11990.3119 06/30/2022 11024.6503 11554.9988 11760.3534 07/31/2022 11237.0485 11842.8819 12081.5509 08/31/2022 11058.3954 11611.2855 11774.1193 09/30/2022 10764.7261 11242.6075 11336.1319 10/31/2022 10727.7884 11202.2296 11235.8489 11/30/2022 11013.4369 11634.8946 11804.6324 12/31/2022 11066.2916 11681.9957 11792.3671 01/31/2023 11263.6877 11983.4423 12154.9223 02/28/2023 11078.3904 11726.2824 11859.776 03/31/2023 11241.6221 11967.0254 12125.9499 04/30/2023 11226.3287 11938.2566 12111.7038 05/31/2023 11130.6158 11817.0447 12018.8841 06/30/2023 11190.1621 11902.6474 12128.6911 07/31/2023 11241.1019 11933.0188 12159.4442 08/31/2023 11129.3 11829.2011 12012.0412 09/30/2023 10954.309 11557.1486 11671.6555 10/31/2023 10898.3249 11480.6925 11525.4929 11/30/2023 11346.0348 12052.0418 12262.5884 12/31/2023 11528.5178 12314.205 12561.5363 01/31/2024 11490.6854 12277.4232 12533.8245 02/29/2024 11500.1688 12288.2896 12535.4652 03/31/2024 11536.5083 12276.5241 12522.8598 04/30/2024 11453.2542 12144.3676 12382.8399 05/31/2024 11397.1535 12061.032 12356.9688 06/30/2024 11518.7908 12227.9768 12555.7339 07/31/2024 11603.3229 12337.7359 12664.2203 08/31/2024 11679.4269 12462.583 12763.903 09/30/2024 11737.2375 12575.0392 12899.3409 Effective September 30, 2024, the Fund changed its benchmark to the ICE BofA U.S. Municipal Securities Index, a broad-based securities market index that represents the overall applicable market in which the Fund invests.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year New Mexico Intermediate Municipal Fund Class I 7.15% 0.88% 1.61% ICE BofA 3-15 Year U.S. Municipal Securities Index 8.81% 1.41% 2.32% ICE BofA U.S. Municipal Securities Index 10.52% 1.43% 2.58%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fnm/THNIX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 94,500,000
Holdings Count | Holdings	94
Advisory Fees Paid, Amount	$ 500,000
Investment Company, Portfolio Turnover	19.49%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $94.5 Number of Holdings 94 Annual Portfolio Turnover 19.49% Total Advisory Fee $0.5
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) AAA 40.6 AA 43.5 A 5.2 BBB 8.3 NR 0.4 Below Invest. Grade 0.0 Cash & Cash Equivalent 2.0 Credit Quality Ratings (%) AAA 40.6% AA 43.5% A 5.2% BBB 8.3% NR 0.4% Below Invest. Grade 0.0% Cash & Cash Equivalent 2.0% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg New York Intermediate Municipal Fund - Class A
Shareholder Report [Line Items]
Class Name	CLASS: A
Trading Symbol	THNYX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg New York Intermediate Municipal Fund Class A Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $103.00 0.99%
Expenses Paid, Amount	$ 103
Expense Ratio, Percent	0.99%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class A shares underperformed the ICE BofA 3-15 Year U.S. Municipal Securities Index (the “Index”) during the 12-month period ended September 30, 2024. The period began with municipal bond yields peaking in October of 2023, which marked the end of the Federal Reserve rate hiking cycle, before falling precipitously throughout the period and ending significantly lower. The backdrop of falling municipal bond yields boosted bond prices due to the inverse relationship between the two, which produced strong absolute returns for the asset class. However, the Fund’s relative underperformance during the period was driven by its shorter duration and its focus on New York bonds. The Fund’s single-state focus and the impact on relative performance were evident in individual bond selection. The Fund’s relative performance benefited from active management regarding its sector/quality returns and thanks to its higher weighting to revenue and AA-rated bonds. Specifically, within the revenue sector, multi-family housing and other utilities bonds were positive contributors to relative performance during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg New York Intermediate Municipal Fund ICE BofA 3-15 Year U.S. Municipal Securities Index ICE BofA U.S. Municipal Securities Index 09/30/2014 9799.8538 10000 10000 10/31/2014 9839.238 10047.8828 10061.0061 11/30/2014 9842.4585 10053.6678 10074.732 12/31/2014 9889.9187 10084.4301 10133.237 01/31/2015 10034.4922 10254.7365 10315.1349 02/28/2015 9919.2889 10156.2738 10213.0312 03/31/2015 9944.2859 10171.2054 10243.2441 04/30/2015 9894.5819 10142.593 10191.582 05/31/2015 9866.5418 10095.8047 10157.4674 06/30/2015 9855.4399 10091.6614 10143.7215 07/31/2015 9917.5858 10164.9514 10223.9759 08/31/2015 9927.1334 10178.2804 10246.5455 09/30/2015 9983.1251 10260.1697 10315.6951 10/31/2015 10008.7567 10309.2642 10359.774 11/30/2015 10042.3477 10336.704 10410.5357 12/31/2015 10105.2377 10403.1536 10493.2511 01/31/2016 10206.4112 10545.9421 10609.5409 02/29/2016 10209.6051 10558.2157 10618.4247 03/31/2016 10227.5209 10572.4828 10665.2047 04/30/2016 10284.5045 10641.3168 10746.9397 05/31/2016 10287.5906 10632.3656 10780.454 06/30/2016 10406.4116 10781.0955 10955.589 07/31/2016 10378.6022 10791.4929 10949.7465 08/31/2016 10404.8746 10807.5581 10974.9373 09/30/2016 10373.8244 10772.5352 10921.9146 10/31/2016 10300.1141 10684.1963 10819.6708 11/30/2016 9986.4674 10291.4401 10425.262 12/31/2016 10053.598 10397.3686 10539.3308 01/31/2017 10090.4686 10465.499 10592.9738 02/28/2017 10136.7806 10539.5316 10661.5031 03/31/2017 10142.8378 10563.688 10685.8535 04/30/2017 10204.1906 10656.2093 10762.9465 05/31/2017 10288.5602 10805.9945 10922.1347 06/30/2017 10263.1597 10760.9261 10897.224 07/31/2017 10308.9546 10844.2226 10976.8981 08/31/2017 10362.1722 10935.1022 11069.4177 09/30/2017 10319.881 10880.3008 11027.4598 10/31/2017 10315.6117 10886.9849 11047.8085 11/30/2017 10262.9386 10795.4017 11000.3481 12/31/2017 10321.657 10879.48 11110.0751 01/31/2018 10253.2693 10775.5841 10993.045 02/28/2018 10226.502 10732.2746 10946.205 03/31/2018 10214.5162 10752.9521 10982.8206 04/30/2018 10187.2615 10716.9521 10940.1224 05/31/2018 10247.4375 10832.1835 11068.6574 06/30/2018 10284.5797 10844.8089 11080.8826 07/31/2018 10296.8527 10887.923 11107.1138 08/31/2018 10301.6431 10900.5093 11124.0611 09/30/2018 10250.1394 10842.2682 11053.4109 10/31/2018 10198.2411 10780.9782 10973.8968 11/30/2018 10268.5256 10907.4279 11094.9286 12/31/2018 10338.5214 11037.0046 11225.6846 01/31/2019 10400.9397 11148.21 11309.9006 02/28/2019 10439.689 11210.7117 11374.1081 03/31/2019 10534.3744 11343.3373 11556.5862 04/30/2019 10555.7504 11371.5979 11604.8669 05/31/2019 10658.3283 11536.2365 11776.3203 06/30/2019 10687.5693 11586.5037 11826.3817 07/31/2019 10756.3452 11687.9371 11920.3619 08/31/2019 10867.034 11824.3933 12108.5024 09/30/2019 10778.9973 11725.0707 12018.0237 10/31/2019 10781.2279 11746.7645 12032.5099 11/30/2019 10792.2956 11765.8003 12055.2997 12/31/2019 10810.3707 11810.2043 12094.0362 01/31/2020 10970.2447 12006.387 12310.4889 02/29/2020 11081.004 12123.3774 12480.4216 03/31/2020 10755.1238 11719.2465 12011.9411 04/30/2020 10596.9391 11604.3278 11828.8427 05/31/2020 10884.3234 11977.5009 12213.0072 06/30/2020 10961.5177 12060.0157 12331.8981 07/31/2020 11080.2923 12237.8661 12529.0824 08/31/2020 11012.8181 12208.4328 12486.8844 09/30/2020 11005.3728 12204.7586 12478.7409 10/31/2020 10962.7774 12179.5859 12453.9903 11/30/2020 11090.9438 12323.1952 12644.4318 12/31/2020 11133.9076 12395.5471 12730.2285 01/31/2021 11176.6638 12465.5928 12814.1645 02/28/2021 11041.626 12279.4948 12608.4364 03/31/2021 11075.7863 12337.4232 12685.0892 04/30/2021 11144.9395 12430.1791 12805.5408 05/31/2021 11159.9444 12459.2214 12861.4247 06/30/2021 11176.3901 12480.9153 12903.5827 07/31/2021 11251.8144 12575.5864 13000.3241 08/31/2021 11224.304 12545.9186 12952.2436 09/30/2021 11137.2845 12456.0944 12854.4017 10/31/2021 11110.1513 12428.3028 12840.0155 11/30/2021 11161.8936 12499.9902 12944.6803 12/31/2021 11169.3601 12512.5375 12962.708 01/31/2022 10933.9014 12167.3123 12614.479 02/28/2022 10900.3758 12112.0809 12543.3886 03/31/2022 10630.0585 11777.5267 12161.105 04/30/2022 10456.6639 11497.6567 11801.7111 05/31/2022 10562.6425 11677.4615 11990.3119 06/30/2022 10477.2664 11554.9988 11760.3534 07/31/2022 10635.5491 11842.8819 12081.5509 08/31/2022 10487.3148 11611.2855 11774.1193 09/30/2022 10304.4114 11242.6075 11336.1319 10/31/2022 10279.1522 11202.2296 11235.8489 11/30/2022 10510.9681 11634.8946 11804.6324 12/31/2022 10539.2588 11681.9957 11792.3671 01/31/2023 10709.0278 11983.4423 12154.9223 02/28/2023 10579.1638 11726.2824 11859.776 03/31/2023 10705.716 11967.0254 12125.9499 04/30/2023 10698.8698 11938.2566 12111.7038 05/31/2023 10647.2215 11817.0447 12018.8841 06/30/2023 10704.1925 11902.6474 12128.6911 07/31/2023 10734.3943 11933.0188 12159.4442 08/31/2023 10658.6289 11829.2011 12012.0412 09/30/2023 10484.6195 11557.1486 11671.6555 10/31/2023 10427.4202 11480.6925 11525.4929 11/30/2023 10850.7339 12052.0418 12262.5884 12/31/2023 11040.1646 12314.205 12561.5363 01/31/2024 10999.2582 12277.4232 12533.8245 02/29/2024 11006.9158 12288.2896 12535.4652 03/31/2024 11022.3551 12276.5241 12522.8598 04/30/2024 10965.6068 12144.3676 12382.8399 05/31/2024 10936.422 12061.032 12356.9688 06/30/2024 11054.78 12227.9768 12555.7339 07/31/2024 11118.4628 12337.7359 12664.2203 08/31/2024 11182.7464 12462.583 12763.903 09/30/2024 11237.8992 12575.0392 12899.3409 Effective September 30, 2024, the Fund changed its benchmark to the ICE BofA U.S. Municipal Securities Index, a broad-based securities market index that represents the overall applicable market in which the Fund invests.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year New York Intermediate Municipal Fund Class A (with sales charge) 5.01% 0.44% 1.17% New York Intermediate Municipal Fund Class A (without sales charge) 7.18% 0.84% 1.38% ICE BofA 3-15 Year U.S. Municipal Securities Index 8.81% 1.41% 2.32% ICE BofA U.S. Municipal Securities Index 10.52% 1.43% 2.58%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment and assumes the deduction of the maximum sales charge associated with that investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fny/THNYX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 25,300,000
Holdings Count | Holdings	56
Advisory Fees Paid, Amount	$ 100,000
Investment Company, Portfolio Turnover	20.23%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $25.3 Number of Holdings 56 Annual Portfolio Turnover 20.23% Total Advisory Fee $0.1
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) AAA 20.5 AA 50.0 A 17.5 BBB 4.0 NR 7.4 Below Invest. Grade 0.0 Cash & Cash Equivalent 0.7 Credit Quality Ratings (%) AAA 20.5% AA 50.0% A 17.5% BBB 4.0% NR 7.4% Below Invest. Grade 0.0% Cash & Cash Equivalent 0.7% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg New York Intermediate Municipal Fund - Class I
Shareholder Report [Line Items]
Class Name	CLASS: I
Trading Symbol	TNYIX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg New York Intermediate Municipal Fund Class I Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $70.00 0.67%
Expenses Paid, Amount	$ 70
Expense Ratio, Percent	0.67%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class I shares underperformed the ICE BofA 3-15 Year U.S. Municipal Securities Index (the “Index”) during the 12-month period ended September 30, 2024. The period began with municipal bond yields peaking in October of 2023, which marked the end of the Federal Reserve rate hiking cycle, before falling precipitously throughout the period and ending significantly lower. The backdrop of falling municipal bond yields boosted bond prices due to the inverse relationship between the two, which produced strong absolute returns for the asset class. However, the Fund’s relative underperformance during the period was driven by its shorter duration and its focus on New York bonds. The Fund’s single-state focus and the impact on relative performance were evident in individual bond selection. The Fund’s relative performance benefited from active management regarding its sector/quality returns and thanks to its higher weighting to revenue and AA-rated bonds. Specifically, within the revenue sector, multi-family housing and other utilities bonds were positive contributors to relative performance during the period.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg New York Intermediate Municipal Fund ICE BofA 3-15 Year U.S. Municipal Securities Index ICE BofA U.S. Municipal Securities Index 09/30/2014 10000.0046 10000 10000 10/31/2014 10042.9303 10047.8828 10061.0061 11/30/2014 10048.8597 10053.6678 10074.732 12/31/2014 10100.0624 10084.4301 10133.237 01/31/2015 10250.4864 10254.7365 10315.1349 02/28/2015 10135.3075 10156.2738 10213.0312 03/31/2015 10163.6124 10171.2054 10243.2441 04/30/2015 10115.4918 10142.593 10191.582 05/31/2015 10089.7261 10095.8047 10157.4674 06/30/2015 10079.4872 10091.6614 10143.7215 07/31/2015 10145.7882 10164.9514 10223.9759 08/31/2015 10158.3134 10178.2804 10246.5455 09/30/2015 10218.9285 10260.1697 10315.6951 10/31/2015 10247.9573 10309.2642 10359.774 11/30/2015 10285.0418 10336.704 10410.5357 12/31/2015 10352.2588 10403.1536 10493.2511 01/31/2016 10458.7312 10545.9421 10609.5409 02/29/2016 10464.6609 10558.2157 10618.4247 03/31/2016 10485.8498 10572.4828 10665.2047 04/30/2016 10547.0321 10641.3168 10746.9397 05/31/2016 10553.0607 10632.3656 10780.454 06/30/2016 10677.731 10781.0955 10955.589 07/31/2016 10652.0959 10791.4929 10949.7465 08/31/2016 10681.9525 10807.5581 10974.9373 09/30/2016 10652.866 10772.5352 10921.9146 10/31/2016 10580.0698 10684.1963 10819.6708 11/30/2016 10260.6607 10291.4401 10425.262 12/31/2016 10332.4281 10397.3686 10539.3308 01/31/2017 10373.1442 10465.499 10592.9738 02/28/2017 10423.3133 10539.5316 10661.5031 03/31/2017 10432.3703 10563.688 10685.8535 04/30/2017 10498.2322 10656.2093 10762.9465 05/31/2017 10587.9024 10805.9945 10922.1347 06/30/2017 10564.5493 10760.9261 10897.224 07/31/2017 10614.573 10844.2226 10976.8981 08/31/2017 10672.2598 10935.1022 11069.4177 09/30/2017 10631.504 10880.3008 11027.4598 10/31/2017 10630.0564 10886.9849 11047.8085 11/30/2017 10578.6016 10795.4017 11000.3481 12/31/2017 10642.0106 10879.48 11110.0751 01/31/2018 10574.3847 10775.5841 10993.045 02/28/2018 10549.3428 10732.2746 10946.205 03/31/2018 10539.8429 10752.9521 10982.8206 04/30/2018 10514.5225 10716.9521 10940.1224 05/31/2018 10579.5117 10832.1835 11068.6574 06/30/2018 10620.639 10844.8089 11080.8826 07/31/2018 10636.1969 10887.923 11107.1138 08/31/2018 10644.0605 10900.5093 11124.0611 09/30/2018 10593.6484 10842.2682 11053.4109 10/31/2018 10542.8666 10780.9782 10973.8968 11/30/2018 10618.2874 10907.4279 11094.9286 12/31/2018 10693.5664 11037.0046 11225.6846 01/31/2019 10761.0185 11148.21 11309.9006 02/28/2019 10803.7542 11210.7117 11374.1081 03/31/2019 10904.6784 11343.3373 11556.5862 04/30/2019 10929.6512 11371.5979 11604.8669 05/31/2019 11038.8525 11536.2365 11776.3203 06/30/2019 11072.0808 11586.5037 11826.3817 07/31/2019 11146.3531 11687.9371 11920.3619 08/31/2019 11264.1036 11824.3933 12108.5024 09/30/2019 11175.7982 11725.0707 12018.0237 10/31/2019 11181.1658 11746.7645 12032.5099 11/30/2019 11195.5676 11765.8003 12055.2997 12/31/2019 11217.3507 11810.2043 12094.0362 01/31/2020 11394.8778 12006.387 12310.4889 02/29/2020 11504.0244 12123.3774 12480.4216 03/31/2020 11168.714 11719.2465 12011.9411 04/30/2020 11007.3616 11604.3278 11828.8427 05/31/2020 11308.8753 11977.5009 12213.0072 06/30/2020 11392.0568 12060.0157 12331.8981 07/31/2020 11518.5979 12237.8661 12529.0824 08/31/2020 11460.371 12208.4328 12486.8844 09/30/2020 11446.8293 12204.7586 12478.7409 10/31/2020 11405.6263 12179.5859 12453.9903 11/30/2020 11541.9956 12323.1952 12644.4318 12/31/2020 11589.8485 12395.5471 12730.2285 01/31/2021 11637.5114 12465.5928 12814.1645 02/28/2021 11499.7179 12279.4948 12608.4364 03/31/2021 11538.4256 12337.4232 12685.0892 04/30/2021 11613.5175 12430.1791 12805.5408 05/31/2021 11632.3126 12459.2214 12861.4247 06/30/2021 11652.5224 12480.9153 12903.5827 07/31/2021 11734.3643 12575.5864 13000.3241 08/31/2021 11708.853 12545.9186 12952.2436 09/30/2021 11621.1474 12456.0944 12854.4017 10/31/2021 11595.9721 12428.3028 12840.0155 11/30/2021 11653.0257 12499.9902 12944.6803 12/31/2021 11663.9171 12512.5375 12962.708 01/31/2022 11421.1774 12167.3123 12614.479 02/28/2022 11388.9539 12112.0809 12543.3886 03/31/2022 11118.694 11777.5267 12161.105 04/30/2022 10931.2486 11497.6567 11801.7111 05/31/2022 11044.9942 11677.4615 11990.3119 06/30/2022 10958.5917 11554.9988 11760.3534 07/31/2022 11136.3318 11842.8819 12081.5509 08/31/2022 10975.065 11611.2855 11774.1193 09/30/2022 10786.5267 11242.6075 11336.1319 10/31/2022 10763.03 11202.2296 11235.8489 11/30/2022 11008.5704 11634.8946 11804.6324 12/31/2022 11041.177 11681.9957 11792.3671 01/31/2023 11222.0686 11983.4423 12154.9223 02/28/2023 11088.7207 11726.2824 11859.776 03/31/2023 11224.38 11967.0254 12125.9499 04/30/2023 11229.5129 11938.2566 12111.7038 05/31/2023 11169.0142 11817.0447 12018.8841 06/30/2023 11231.7252 11902.6474 12128.6911 07/31/2023 11266.4765 11933.0188 12159.4442 08/31/2023 11189.9852 11829.2011 12012.0412 09/30/2023 11010.2274 11557.1486 11671.6555 10/31/2023 10953.1238 11480.6925 11525.4929 11/30/2023 11400.7026 12052.0418 12262.5884 12/31/2023 11602.8536 12314.205 12561.5363 01/31/2024 11562.9876 12277.4232 12533.8245 02/29/2024 11573.9768 12288.2896 12535.4652 03/31/2024 11593.328 12276.5241 12522.8598 04/30/2024 11536.6734 12144.3676 12382.8399 05/31/2024 11509.1039 12061.032 12356.9688 06/30/2024 11636.7027 12227.9768 12555.7339 07/31/2024 11706.8862 12337.7359 12664.2203 08/31/2024 11777.7491 12462.583 12763.903 09/30/2024 11838.9304 12575.0392 12899.3409 Effective September 30, 2024, the Fund changed its benchmark to the ICE BofA U.S. Municipal Securities Index, a broad-based securities market index that represents the overall applicable market in which the Fund invests.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year 10 Year New York Intermediate Municipal Fund Class I 7.53% 1.16% 1.70% ICE BofA 3-15 Year U.S. Municipal Securities Index 8.81% 1.41% 2.32% ICE BofA U.S. Municipal Securities Index 10.52% 1.43% 2.58%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, visit https://www.thornburg.com/product/mutual-funds/fny/TNYIX or call 1-800-847-0200. Performance for other share classes of the Fund will vary.
Net Assets	$ 25,300,000
Holdings Count | Holdings	56
Advisory Fees Paid, Amount	$ 100,000
Investment Company, Portfolio Turnover	20.23%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $25.3 Number of Holdings 56 Annual Portfolio Turnover 20.23% Total Advisory Fee $0.1
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) AAA 20.5 AA 50.0 A 17.5 BBB 4.0 NR 7.4 Below Invest. Grade 0.0 Cash & Cash Equivalent 0.7 Credit Quality Ratings (%) AAA 20.5% AA 50.0% A 17.5% BBB 4.0% NR 7.4% Below Invest. Grade 0.0% Cash & Cash Equivalent 0.7% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Emerging Markets Managed Account Fund - Class I
Shareholder Report [Line Items]
Class Name	CLASS: I
Trading Symbol	THMGX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Emerging Markets Managed Account Fund Class I Shares for the period from October 2, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $0.00 0.00% Fund costs may be higher for a full one year period. End Block Thornburg Emerging Markets Managed Account Fund Tailored Shareholder Report Thornburg Emerging Markets Managed Account Fund Tailored Shareholder Report 9/30/24 TH6224 Annual Performance Since Inception Emerging Markets Managed Account Fund Class I 6.67% MSCI Emerging Markets Net Total Return USD Index 26.22%
Expenses Paid, Amount	$ 0
Expense Ratio, Percent	0%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class I shares underperformed the MSCI Emerging Markets Net Total Return USD Index (the “Index”) during the period from the Fund’s inception on October 2, 2023 to September 30, 2024. The Fund’s relative underperformance during the period was primarily driven by bottom-up stock selection, followed by country allocation decisions. During the period, the Fund’s underweight allocation to materials and stock selection in communication services contributed positively to relative performance. Stock selection in health care and consumer staples were primary detractors. On a geographic basis, stock selection within South Korea and Saudi Arabia aided relative performance, while stock selection within China and Taiwan hampered relative results.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Emerging Markets Managed Account Fund MSCI Emerging Markets Net Total Return USD Index 10/02/2023 10000 10000 10/31/2023 9360 9624.4117 11/30/2023 9910 10394.6479 12/31/2023 10324.8726 10801.0108 01/31/2024 9691.5065 10299.4913 02/29/2024 10264.552 10789.4577 03/31/2024 10535.9946 11056.8188 04/30/2024 10214.2849 11106.2889 05/31/2024 10324.8726 11169.0117 06/30/2024 10747.1167 11609.5687 07/31/2024 10666.6892 11644.1067 08/31/2024 10666.6892 11832.1133 09/30/2024 10666.6892 12622.1982
Average Annual Return [Table Text Block]	Annual Performance Since Inception Emerging Markets Managed Account Fund Class I 6.67% MSCI Emerging Markets Net Total Return USD Index 26.22%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, call 1-800-847-0200.
Net Assets	$ 1,100,000
Holdings Count | Holdings	29
Advisory Fees Paid, Amount	$ 0
Investment Company, Portfolio Turnover	145.98%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $1.1 Number of Holdings 29 Annual Portfolio Turnover 145.98% Total Advisory Fee $0.0
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Market Capitalization Exposure (%) Small Cap (<$2.5 B) 10.2 Mid Cap ($2.5-12 B) 40.4 Large Cap (>$12 B) 49.4 Market Capitalization Exposure (%) Small Cap (<$2.5 B) 10.2% Mid Cap ($2.5-12 B) 40.4% Large Cap (>$12 B) 49.4% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 2, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
Thornburg Municipal Managed Account Fund - Class I
Shareholder Report [Line Items]
Class Name	CLASS: I
Trading Symbol	THMMX
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Municipal Managed Account Fund Class I Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $0.00 0.00%
Expenses Paid, Amount	$ 0
Expense Ratio, Percent	0%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class I shares outperformed the ICE BofA U.S. Municipal Master Index (the “Index”) during the 12-month period ended September 30, 2024. The period began with municipal bond yields peaking in October of 2023, which marked the end of the Federal Reserve rate hiking cycle, before falling precipitously throughout the period and ending significantly lower. The backdrop of falling municipal yields boosted bond prices due to the inverse relationship between the two, which produced strong absolute returns for the asset class. However, the Fund’s relative performance during the period was negatively impacted by its yield curve positioning versus its Index. The Fund’s relative performance benefited from numerous factors, including its longer duration positioning versus the Index, sector/quality returns, and individual bond selection. The Fund benefited from our active management approach with respect to its sector/quality returns thanks to its higher weighting to revenue bonds and A-rated bonds. Specifically, within the revenue sector, hospital, and other utility bonds were large contributors to relative performance during the period
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Municipal Managed Account Fund ICE BofA U.S. Municipal Securities Index 05/15/2023 10000 10000 05/31/2023 9994.6706 9885.9154 06/30/2023 10033.7562 9976.2351 07/31/2023 10113.8107 10001.5306 08/31/2023 10041.3054 9880.2868 09/30/2023 9826.2067 9600.3087 10/31/2023 9701.8796 9480.0854 11/30/2023 10239.6294 10086.3699 12/31/2023 10460.5139 10332.2641 01/31/2024 10467.5432 10309.4702 02/29/2024 10535.4002 10310.8198 03/31/2024 10625.2902 10300.4514 04/30/2024 10538.0876 10185.2806 05/31/2024 10586.5591 10164.0008 06/30/2024 10731.8429 10327.4914 07/31/2024 10866.5678 10416.725 08/31/2024 10969.4906 10498.7171 09/30/2024 11105.7907 10610.1192 Effective September 30, 2024, the name of the Fund’s broad-based securities market index was changed from the ICE BofA U.S. Municipal Master Index to the ICE BofA U.S. Municipal Securities Index.
Average Annual Return [Table Text Block]	Annual Performance 1 Year Municipal Managed Account Fund Class I 13.02% ICE BofA U.S. Municipal Securities Index 10.52%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, call 1-800-847-0200.
Net Assets	$ 11,300,000
Holdings Count | Holdings	62
Advisory Fees Paid, Amount	$ 0
Investment Company, Portfolio Turnover	21.60%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $11.3 Number of Holdings 62 Annual Portfolio Turnover 21.60% Total Advisory Fee $0.0
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Credit Quality Ratings (%) AAA 15.1 AA 17.6 A 30.9 BBB 21.8 NR 11.9 Below Invest. Grade 0.9 Cash & Cash Equivalent 1.7 Credit Quality Ratings (%) AAA 15.1% AA 17.6% A 30.9% BBB 21.8% NR 11.9% Below Invest. Grade 0.9% Cash & Cash Equivalent 1.7% Expressed as a percentage of the Fund’s net assets. * Credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Services, both of which are independent, nationally recognized statistical rating organizations. If a credit rating for an investment is not available from either S&P or Moody’s, then the Fund’s investment advi­sor will determine the credit quality of the investment. Investments are considered to be investment grade if they are rated within the four highest grades by S&P or Moody’s (BBB/Baa or higher) or, if no credit rating is available, have been judged to be of comparable quality by the Fund’s investment advisor. (NR = Not Rated)
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.
C 000161463 [Member]
Shareholder Report [Line Items]
Class Name	CLASS: I
Shareholder Report Annual or Semi-Annual	Annual Shareholder Report
Additional Information [Text Block]	This annual shareholder report contains important information about the Thornburg Capital Management Fund Class I Shares for the period from October 1, 2023 to September 30, 2024. You can find additional information about the Fund at https://www.thornburg.com/download. 1-800-847-0200.
Additional Information Phone Number	1-800-847-0200.
Additional Information Website	https://www.thornburg.com/download.
Expenses [Text Block]	What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $1.00 0.01%
Expenses Paid, Amount	$ 1
Expense Ratio, Percent	0.01%
Factors Affecting Performance [Text Block]	How did the Fund perform last year and what affected its performance? The Fund’s Class I shares generated positive total returns and outpaced the FTSE 1-Month Treasury Bill Local Currency Index (the “Index”) during the 12-month period ended September 30, 2024. Over the reporting period, the Fund accomplished its goal of 'safety of capital' by providing a share price of $10.00 that has not fluctuated since the Fund’s inception. The Fund has matched or beat the Index for all standard time periods since inception. As of September 30, 2024, throughout the life of the strategy, the Fund has never suffered a default on any cash equivalent investment.
Line Graph [Table Text Block]	Cumulative Performance Growth Table Date Thornburg Capital Management Fund FTSE 1-Month Treasury Bill Local Currency Index ICE BofA U.S. 1-Month Treasury Bill Index 07/31/2015 10000 10000 10000 08/31/2015 10002.22 10000.2559 10000.264 09/30/2015 10004.35 10000.2742 10000.33 10/31/2015 10006.68 10000.2193 10000.198 11/30/2015 10008.78 10000.2742 10000.264 12/31/2015 10012 10001.1698 10001.3198 01/31/2016 10016.22 10002.303 10001.9798 02/29/2016 10020.38 10004.1125 10003.6955 03/31/2016 10024.92 10006.1047 10005.8073 04/30/2016 10029.16 10007.5487 10006.5332 05/31/2016 10033.27 10008.9743 10007.655 06/30/2016 10037.25 10010.601 10009.8988 07/31/2016 10041.35 10012.1912 10011.9445 08/31/2016 10045.43 10013.7265 10013.7263 09/30/2016 10049.44 10015.9929 10015.97 10/31/2016 10053.48 10017.7293 10017.3558 11/30/2016 10057.49 10019.1367 10019.0056 12/31/2016 10062.52 10022.2987 10021.8433 01/31/2017 10068.57 10026.0639 10025.3408 02/28/2017 10074.14 10029.8291 10028.9044 03/31/2017 10081.11 10033.3018 10032.468 04/30/2017 10089.08 10039.4797 10038.0773 05/31/2017 10097.62 10045.2554 10043.5546 06/30/2017 10106.51 10052.4933 10050.0878 07/31/2017 10116.84 10059.8775 10056.8849 08/31/2017 10127.13 10068.5045 10065.1339 09/30/2017 10137.19 10076.5101 10074.9007 10/31/2017 10147.69 10084.7168 10082.8197 11/30/2017 10157.98 10092.96 10090.8707 12/31/2017 10170.04 10102.8116 10100.9674 01/31/2018 10183.61 10113.6686 10111.0642 02/28/2018 10196.14 10124.7448 10122.0848 03/31/2018 10211.83 10137.9047 10135.6131 04/30/2018 10228.92 10151.5946 10148.2176 05/31/2018 10245.76 10165.7598 10162.2078 06/30/2018 10262.9 10180.5281 10177.9799 07/31/2018 10280.98 10195.9179 10193.026 08/31/2018 10298.91 10212.5871 10211.2397 09/30/2018 10316.7 10229.0552 10226.6818 10/31/2018 10337.12 10247.607 10243.9716 11/30/2018 10357.26 10266.3416 10263.5052 12/31/2018 10378.93 10286.648 10282.7088 01/31/2019 10401.52 10308.2704 10301.7805 02/28/2019 10422.24 10327.4254 10320.1262 03/31/2019 10445.39 10348.8651 10342.1674 04/30/2019 10467.65 10369.665 10361.0411 05/31/2019 10490.48 10391.2874 10383.7423 06/30/2019 10512.24 10412.2519 10402.4179 07/31/2019 10533.99 10431.6079 10419.5098 08/31/2019 10554.09 10449.4834 10438.1195 09/30/2019 10573.02 10467.7062 10454.4195 10/31/2019 10590.86 10484.6861 10469.7956 11/30/2019 10606.27 10498.175 10483.5218 12/31/2019 10622.37 10513.1078 10496.7862 01/31/2020 10637.43 10526.4322 10511.4364 02/29/2020 10651.82 10539.7383 10524.1068 03/31/2020 10669.39 10553.1175 10535.9193 04/30/2020 10678.56 10553.4282 10536.3813 05/31/2020 10682.94 10554.2507 10537.1732 06/30/2020 10684.5 10555.3657 10538.0971 07/31/2020 10685.87 10556.5172 10539.4169 08/31/2020 10686.65 10557.3945 10540.2748 09/30/2020 10687.45 10558.1987 10541.1327 10/31/2020 10688.56 10558.8933 10542.0566 11/30/2020 10689.62 10559.6609 10542.7825 12/31/2020 10690.82 10560.4286 10543.5084 01/31/2021 10691.98 10560.9403 10544.1683 02/28/2021 10693.02 10561.3607 10544.6962 03/31/2021 10694.27 10561.6897 10545.0922 04/30/2021 10695.38 10561.8177 10545.1582 05/31/2021 10696.36 10561.9091 10545.2902 06/30/2021 10697.28 10562.0004 10545.3562 07/31/2021 10698.17 10562.4208 10545.8181 08/31/2021 10699.05 10562.7864 10546.1481 09/30/2021 10699.91 10563.0971 10546.478 10/31/2021 10700.87 10563.554 10547.0719 11/30/2021 10701.88 10564.011 10547.5339 12/31/2021 10703.45 10564.9797 10548.1278 01/31/2022 10705.19 10565.4366 10548.3918 02/28/2022 10706.92 10565.7656 10548.6557 03/31/2022 10711.53 10566.3688 10549.3157 04/30/2022 10717.36 10567.6665 10550.7675 05/31/2022 10725.91 10571.121 10553.5391 06/30/2022 10737.61 10577.4633 10559.4124 07/31/2022 10754.86 10587.2419 10569.5751 08/31/2022 10777.57 10607.1827 10588.9107 09/30/2022 10802.37 10627.7633 10610.622 10/31/2022 10834.46 10652.8037 10633.3892 11/30/2022 10870.89 10684.8627 10663.8774 12/31/2022 10911.34 10721.2717 10702.2186 01/31/2023 10953.8 10758.2656 10735.0166 02/28/2023 10994.1 10795.9175 10770.8501 03/31/2023 11040.79 10838.413 10815.7245 04/30/2023 11087.59 10881.3654 10854.5277 05/31/2023 11137.27 10922.088 10894.5847 06/30/2023 11186.24 10969.1529 10941.5049 07/31/2023 11237.22 11017.8262 10986.2473 08/31/2023 11289.67 11068.5283 11034.4873 09/30/2023 11341.14 11117.9327 11084.7731 10/31/2023 11394.79 11169.2015 11131.9572 11/30/2023 11447.05 11219.1177 11179.5373 12/31/2023 11501.61 11270.8251 11232.1987 01/31/2024 11555.95 11322.9346 11281.6926 02/29/2024 11606.89 11371.6627 11327.8868 03/31/2024 11661.64 11424.2109 11379.7564 04/30/2024 11714.92 11474.9496 11428.0623 05/31/2024 11770.27 11527.6074 11483.5614 06/30/2024 11824.01 11578.8031 11530.6796 07/31/2024 11879.78 11631.5889 11582.8131 08/31/2024 11935.66 11685.124 11638.9061 09/30/2024 11988.01 11736.1186 11685.8263 Effective September 30, 2024, the Fund changed its benchmark to the ICE Bof A U.S. 1-Month Treasury Bill Index, a broad-based securities market index that represents the overall applicable market in which the Fund invests.
Average Annual Return [Table Text Block]	Annual Performance 1 Year 5 Year Capital Management Fund Class I 5.70% 2.54% FTSE 1-Month Treasury Bill Local Currency Index 5.56% 2.31% ICE BofA U.S. 1-Month Treasury Bill Index 5.42% 2.25%
Prior Market Index Comparison [Text Block]	How did the Fund perform over the past 10 years? The line graph below reflects a hypothetical $10,000 investment. The returns shown in the line graph and table assume the reinvestment of dividends and capital gains, but do not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. The performance information shown below represents past performance and is no guarantee of future results. For Fund performance current to the most recent month end, call 1-800-847-0200.
Net Assets	$ 2,094,000,000
Holdings Count | Holdings	62
Advisory Fees Paid, Amount	$ 0
Investment Company, Portfolio Turnover	0%
Additional Fund Statistics [Text Block]	Key Fund Statistics (as of September 30, 2024 ) Fund Size (Millions) $2,094.0 Number of Holdings 62 Annual Portfolio Turnover 0.00% Total Advisory Fee $0.0
Holdings [Text Block]	What did the Fund invest in? (as of September 30, 2024 ) Types of Holdings (%) Commercial Paper 59.6 Mutual Fund 33.7 Other Assets Less Liabilities 6.7 Types of Holdings (%) Commercial Paper 59.6% Mutual Fund 33.7% Other Assets Less Liabilities 6.7% Expressed as a percentage of the Fund’s net assets.
Material Fund Change [Text Block]	How has the Fund changed? This is a summary of certain changes to the Fund since October 1, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at https://www.thornburg.com/download or upon request by calling 1-800-847-0200.
Accountant Change Disagreements [Text Block]	Changes In and Disagreements with Accountants No changes and/or disagreements occurred in the current reporting period.

Shareholder Report, Line Graph

Shareholder Report, Line Graph (Details) - USD ($)	Sep. 30, 2024	Aug. 31, 2024	Jul. 31, 2024	Jun. 30, 2024	May 31, 2024	Apr. 30, 2024	Mar. 31, 2024	Feb. 29, 2024	Jan. 31, 2024	Dec. 31, 2023	Nov. 30, 2023	Oct. 31, 2023	Oct. 02, 2023	Sep. 30, 2023	Aug. 31, 2023	Jul. 31, 2023	Jun. 30, 2023	May 31, 2023	May 15, 2023	Apr. 30, 2023	Mar. 31, 2023	Feb. 28, 2023	Jan. 31, 2023	Dec. 31, 2022	Nov. 30, 2022	Oct. 31, 2022	Sep. 30, 2022	Aug. 31, 2022	Jul. 31, 2022	Jun. 30, 2022	May 31, 2022	Apr. 30, 2022	Mar. 31, 2022	Feb. 28, 2022	Jan. 31, 2022	Jan. 26, 2022	Dec. 31, 2021	Nov. 30, 2021	Oct. 31, 2021	Sep. 30, 2021	Aug. 31, 2021	Jul. 31, 2021	Jun. 30, 2021	May 31, 2021	Apr. 30, 2021	Mar. 31, 2021	Feb. 28, 2021	Jan. 31, 2021	Dec. 31, 2020	Nov. 30, 2020	Oct. 31, 2020	Sep. 30, 2020	Aug. 31, 2020	Jul. 31, 2020	Jun. 30, 2020	May 31, 2020	Apr. 30, 2020	Mar. 31, 2020	Feb. 29, 2020	Jan. 31, 2020	Dec. 31, 2019	Nov. 30, 2019	Oct. 31, 2019	Sep. 30, 2019	Aug. 31, 2019	Jul. 31, 2019	Jun. 30, 2019	May 31, 2019	Apr. 30, 2019	Mar. 31, 2019	Mar. 01, 2019	Feb. 28, 2019	Jan. 31, 2019	Dec. 31, 2018	Nov. 30, 2018	Oct. 31, 2018	Sep. 30, 2018	Aug. 31, 2018	Jul. 31, 2018	Jun. 30, 2018	May 31, 2018	Apr. 30, 2018	Mar. 31, 2018	Feb. 28, 2018	Jan. 31, 2018	Dec. 31, 2017	Nov. 30, 2017	Oct. 31, 2017	Sep. 30, 2017	Aug. 31, 2017	Jul. 31, 2017	Jun. 30, 2017	May 31, 2017	Apr. 30, 2017	Apr. 10, 2017	Mar. 31, 2017	Feb. 28, 2017	Jan. 31, 2017	Dec. 31, 2016	Nov. 30, 2016	Oct. 31, 2016	Sep. 30, 2016	Aug. 31, 2016	Jul. 31, 2016	Jun. 30, 2016	May 31, 2016	Apr. 30, 2016	Mar. 31, 2016	Feb. 29, 2016	Jan. 31, 2016	Dec. 31, 2015	Nov. 30, 2015	Oct. 31, 2015	Sep. 30, 2015	Aug. 31, 2015	Jul. 31, 2015	Jun. 30, 2015	May 31, 2015	Apr. 30, 2015	Mar. 31, 2015	Feb. 28, 2015	Jan. 31, 2015	Dec. 31, 2014	Nov. 30, 2014	Oct. 31, 2014	Sep. 30, 2014
Thornburg Global Opportunities Fund - Class A
Account Value [Line Items]
Account Value	$ 22,489.1081	$ 21,865.8272	$ 21,695.8415	$ 21,406.8658	$ 21,384.2011	$ 20,619.2654	$ 20,670.2611	$ 19,486.0274	$ 18,987.4027	$ 19,095.0603	$ 17,853.4202	$ 16,646.0129		$ 17,476.1712	$ 17,947.4869	$ 18,820.492	$ 17,626.1353	$ 16,913.8059		$ 17,283.3602	$ 17,154.8196	$ 17,299.4278	$ 17,808.2345	$ 16,474.6254	$ 17,037.6688	$ 15,278.0863	$ 14,333.2098	$ 15,675.6574	$ 15,980.2897	$ 15,567.2289	$ 17,245.2884	$ 16,852.8806	$ 17,901.0224	$ 17,761.6144	$ 18,288.2669		$ 18,376.0423	$ 17,545.4124	$ 18,161.5962	$ 17,764.0289	$ 18,346.8264	$ 18,066.7222	$ 18,143.525	$ 18,152.5606	$ 17,958.2948	$ 17,145.089	$ 16,747.5217	$ 16,029.1899	$ 16,060.8146	$ 15,084.9676	$ 13,315.7722	$ 13,374.8596	$ 13,746.2662	$ 12,952.8066	$ 12,015.8489	$ 11,631.7807	$ 11,095.7734	$ 9,871.8197	$ 12,155.1264	$ 12,699.5748	$ 13,130.0688	$ 12,492.9325	$ 11,979.7901	$ 11,471.9602	$ 11,051.5437	$ 11,655.112	$ 11,567.6987	$ 10,839.2542	$ 12,100.5038	$ 11,492.7729		$ 11,384.5469	$ 11,259.6707	$ 10,227.3608	$ 11,024.6323	$ 11,101.9268	$ 12,175.9131	$ 12,363.0471	$ 12,537.9767	$ 12,285.7526	$ 12,562.3854	$ 12,529.8404	$ 12,216.5944	$ 12,757.6557	$ 13,420.7609	$ 12,932.5853	$ 12,593.9289	$ 12,817.1535	$ 12,573.6357	$ 12,366.6456	$ 12,553.3426	$ 12,139.3623	$ 12,261.9585	$ 11,824.1762		$ 11,390.4474	$ 11,057.0478	$ 11,008.4097	$ 10,631.4649	$ 10,386.4558	$ 10,184.2273	$ 10,070.9793	$ 9,918.4332	$ 9,789.2028	$ 9,486.3191	$ 10,161.112	$ 9,910.9178	$ 10,023.9088	$ 9,592.122	$ 9,612.299	$ 10,257.9614	$ 10,341.9246	$ 10,217.2262	$ 9,818.9957	$ 10,655.682	$ 11,186.6559	$ 10,840.7183	$ 11,251.0164	$ 10,909.1014	$ 10,820.6057	$ 10,856.8085	$ 10,068.3926	$ 10,144.8207	$ 10,221.2487	$ 9,827.0408	$ 9,549.4862
Thornburg Global Opportunities Fund - Class C
Account Value [Line Items]
Account Value	21,806.1862	21,219.655	21,068.6667	20,801.5337	20,795.7264	20,064.0142	20,127.8938	18,989.6748	18,513.4811	18,629.6259	17,437.2686	16,270.321		17,091.0461	17,562.4085	18,427.4971	17,274.0456	16,586.411		16,963.501	16,841.5013	16,996.7736	17,512.4995	16,209.3211	16,776.1303	15,047.3444	14,125.7484	15,462.3321	15,769.5307	15,376.1008	17,041.4409	16,669.5689	17,715.1222	17,591.1648	18,119.3309		18,216.341	17,404.343	18,025.897	17,643.3721	18,233.6883	17,969.2267	18,054.2322	18,077.8448	17,893.6662	17,095.5586	16,713.0337	15,999.9316	16,042.4344	15,083.7608	13,319.0819	13,389.4602	13,767.7432	12,980.3866	12,052.2736	11,673.9906	11,141.7551	9,914.5346	12,219.4219	12,773.6506	13,209.1159	12,580.1104	12,069.3122	11,564.0649	11,145.9292	11,760.066	11,681.6656	10,954.2837	12,239.1798	11,629.3986		11,529.2203	11,407.264	10,366.2804	11,182.1404	11,268.3226	12,367.1457	12,569.6739	12,754.9656	12,505.0372	12,793.7476	12,767.8929	12,457.637	13,013.5122	13,702.9698	13,207.4222	12,877.0031	13,109.5644	12,868.3897	12,665.9753	12,864.083	12,450.6408	12,584.1482	12,140.5591		11,705.5834	11,369.6616	11,322.288	10,943.2993	10,701.6831	10,495.0536	10,387.4341	10,232.4621	10,107.6234	9,801.9841	10,503.6632	10,253.986	10,374.5198	9,935.4322	9,956.9561	10,637.1114	10,731.8165	10,606.9779	10,202.3286	11,076.1989	11,635.8203	11,287.1332	11,717.6112	11,368.924	11,282.8284	11,330.181	10,512.2728	10,602.6731	10,684.464	10,284.1194	10,000.0039
Thornburg Global Opportunities Fund - Class I
Account Value [Line Items]
Account Value	24,300.9188	23,619.3003	23,436.7239	23,114.1722	23,083.7428	22,256.0632	22,304.7502	21,020.6295	20,478.9862	20,582.4462	19,246.049	17,941.0061		18,830.3109	19,329.4691	20,264.6734	18,973.7472	18,204.9289		18,595.0754	18,451.6392	18,600.8129	19,145.8706	17,705.7707	18,310.5662	16,408.8505	15,393.9838	16,833.5502	17,153.4538	16,706.6918	18,504.7709	18,080.0712	19,199.734	19,045.2977	19,602.3713		19,690.6206	18,794.8876	19,451.9048	19,018.463	19,639.7296	19,336.3203	19,413.3766	19,418.1926	19,206.2878	18,329.7721	17,905.9624	17,130.5831	17,159.4793	16,118.2923	14,222.6726	14,281.0359	14,671.6206	13,827.5984	12,821.9549	12,408.9227	11,834.2693	10,523.3411	12,956.6393	13,531.2927	13,989.2197	13,311.1772	12,758.0784	12,215.0875	11,764.8024	12,400.499	12,307.7933	11,530.8307	12,868.4424	12,219.5021		12,100.309	11,963.4576	10,864.2322	11,709.3523	11,786.6984	12,921.1091	13,118.7715	13,303.543	13,032.8313	13,320.731	13,282.0579	12,946.8911	13,518.3935	14,218.8061	13,694.5709	13,333.7884	13,569.3677	13,303.8056	13,080.9941	13,273.6134	12,832.7291	12,960.1558	12,490.2754		12,033.2099	11,679.1074	11,619.3678	11,222.5256	10,961.5272	10,740.34	10,616.9856	10,456.9983	10,317.0061	9,994.5996	10,698.631	10,436.3475	10,550.5677	10,093.6867	10,110.6082	10,787.469	10,872.2256	10,737.6372	10,317.0482	11,191.8733	11,747.0508	11,381.1383	11,805.9332	11,444.2267	11,347.4912	11,381.1383	10,552.578	10,632.4899	10,706.1872	10,294.2491	10,000.0076
Thornburg Global Opportunities Fund - Class R3
Account Value [Line Items]
Account Value	23,114.5304	22,477.2137	22,306.0824	22,011.0284	21,993.3252	21,208.4815	21,267.4923	20,051.8698	19,532.5748	19,644.6953	18,374.1106	17,136.8932		17,991.7822	18,477.8956	19,377.4847	18,153.82	17,421.8562		17,807.3944	17,673.2941	17,824.1569	18,354.9703	16,980.4429	17,566.7263	15,748.4746	14,776.6798	16,169.5857	16,482.7196	16,061.6085	17,800.0414	17,395.1269	18,480.2978	18,339.9274	18,879.8134		18,976.9929	18,120.8125	18,761.5373	18,350.183	18,960.1221	18,676.4295	18,756.8091	18,770.9937	18,572.4089	17,735.5157	17,328.8897	16,586.5607	16,619.6581	15,617.2776	13,789.1486	13,850.9437	14,234.9565	13,418.3776	12,451.7247	12,054.4701	11,502.7276	10,231.5129	12,601.7987	13,166.783	13,617.0049	12,960.8988	12,431.52	11,907.72	11,471.22	12,099.78	12,012.48	11,257.335	12,571.2	11,942.64		11,829.15	11,698.2	10,628.775	11,458.2038	11,543.8406	12,661.4009	12,858.3655	13,042.4846	12,781.2924	13,072.4575	13,038.2028	12,717.0648	13,282.2677	13,975.9258	13,466.3868	13,121.487	13,356.5625	13,104.3906	12,886.4115	13,087.2942	12,655.6101	12,786.9249	12,329.944		11,881.5047	11,535.5658	11,484.3156	11,095.6683	10,840.1478	10,627.0108	10,511.9168	10,351.6864	10,219.7365	9,904.7592	10,610.4487	10,350.9309	10,470.0538	10,019.0884	10,040.3604	10,721.0628	10,806.7826	10,679.3942	10,267.505	11,137.9924	11,698.5014	11,337.5676	11,766.4419	11,414.0006	11,320.5825	11,363.0453	10,535.0207	10,619.9463	10,700.6256	10,292.9827	9,999.9894
Thornburg Global Opportunities Fund - Class R4
Account Value [Line Items]
Account Value	23,318.6133	22,672.6847	22,500.8321	22,204.5346	22,180.8308	21,392.6795	21,446.0131	20,219.3414	19,697.8578	19,810.4508	18,525.6648	17,278.7399		18,142.1162	18,629.8678	19,538.0949	18,299.0938	17,559.0569		17,945.8943	17,811.3422	17,962.7134	18,495.3157	17,110.5497	17,698.9175	15,871.6197	14,892.4911	16,288.155	16,607.3185	16,179.9641	17,927.2487	17,521.5325	18,608.852	18,468.2037	19,014.5682		19,106.5306	18,241.12	18,882.9008	18,470.9619	19,081.7679	18,797.6721	18,873.431	18,887.6358	18,684.0338	17,841.2162	17,434.0123	16,685.8933	16,719.0378	15,705.7628	13,865.7613	13,927.662	14,312.3308	13,494.357	12,517.2099	12,119.2767	11,562.1702	10,284.3625	12,663.1187	13,233.4896	13,684.4806	13,025.6801	12,490.1629	11,964.6301	11,526.6861	12,152.946	12,065.3572	11,307.7141	12,625.9255	11,990.9067		11,877.0413	11,745.6581	10,668.3158	11,506.1018	11,587.6141	12,707.3354	12,904.681	13,089.1561	12,827.4588	13,114.8968	13,080.5759	12,754.5268	13,320.8226	14,020.1122	13,505.2978	13,157.2646	13,392.751	13,140.1383	12,921.7783	13,118.7305	12,686.2919	12,818.3488	12,360.7034		11,907.335	11,560.5148	11,509.1917	11,115.7151	10,860.6602	10,647.2877	10,527.7992	10,369.0591	10,236.9963	9,917.4895	10,622.1274	10,362.5321	10,481.6906	10,030.5906	10,047.6133	10,728.5189	10,818.834	10,687.3109	10,275.771	11,149.763	11,705.5541	11,344.9263	11,773.437	11,417.0519	11,323.7129	11,366.1397	10,538.8171	10,623.6707	10,700.039	10,292.7417	9,999.9968
Thornburg Global Opportunities Fund - Class R5
Account Value [Line Items]
Account Value	24,288.68	23,608.597	23,420.3597	23,104.6069	23,074.246	22,242.3587	22,290.9361	21,009.7082	20,463.2129	20,572.512	19,234.4	17,932.0781		18,819.5213	19,317.6346	20,250.8813	18,968.3827	18,195.4483		18,590.5037	18,441.6422	18,590.5037	19,134.4205	17,697.335	18,302.0651	16,403.9762	15,385.6085	16,822.3326	17,147.1094	16,701.2295	18,495.7584	18,071.8973	19,189.3493	19,035.218	19,591.1917		19,679.2668	18,785.3635	19,441.2911	19,008.5144	19,628.8277	19,330.6926	19,402.8221	19,407.6307	19,196.051	18,320.8803	17,897.7209	17,123.5314	17,152.3832	16,107.7216	14,214.9271	14,273.2034	14,663.2061	13,815.9588	12,816.2966	12,403.8799	11,825.6	10,516.6253	12,946.2975	13,524.5774	13,981.822	13,300.9005	12,753.0094	12,210.7971	11,756.7494	12,395.9428	12,303.3699	11,523.1132	12,863.2151	12,215.2053		12,096.1831	11,955.1198	10,857.4705	11,700.0026	11,781.5208	12,914.1943	13,111.5541	13,296.0426	13,021.455	13,313.2043	13,274.5904	12,939.9369	13,510.5641	14,209.9042	13,686.4717	13,328.2849	13,563.5403	13,302.6207	13,076.9803	13,269.3517	12,833.3098	12,957.2998	12,487.987		12,031.4736	11,673.7823	11,618.3756	11,222.004	10,957.0878	10,740.4102	10,617.2014	10,450.5874	10,314.9756	9,992.8975	10,695.9048	10,429.6693	10,547.9962	10,091.5925	10,104.2704	10,784.6499	10,867.0961	10,732.6231	10,316.5974	11,190.6716	11,745.3726	11,379.7742	11,804.2045	11,447.0107	11,346.156	11,383.9765	10,551.9251	10,631.7684	10,705.5961	10,294.0039	10,000.0095
Thornburg Global Opportunities Fund - Class R6
Account Value [Line Items]
Account Value	20,287.4406	19,716.177	19,559.4587	19,291.5209	19,261.1883	18,568.5944	18,609.0378	17,532.2312	17,077.2425	17,163.1849	16,046.6161	14,954.0183		15,696.7203	16,110.9194	16,886.9478	15,810.9821	15,168.2593		15,492.0011	15,368.2175	15,492.0011	15,944.2876	14,744.5383	15,244.3387	13,663.5858	12,813.3259	14,011.0039	14,276.1387	13,905.8642	15,396.1047	15,039.5441	15,967.516	15,839.5199	16,301.2201		16,374.3608	15,627.8451	16,171.6239	15,808.7095	16,323.1705	16,071.9221	16,131.7431	16,135.7312	15,956.2681	15,226.4513	14,871.513	14,229.4338	14,249.3741	13,380.7946	11,805.439	11,857.429	12,176.796	11,474.9313	10,639.378	10,297.7296	9,818.6791	8,730.6031	10,747.0716	11,218.695	11,601.1927	11,036.8672	10,579.947	10,127.719	9,752.078	10,280.893	10,200.659	9,555.14	10,663.828	10,124.072		10,025.603	9,908.899	8,997.149	9,696.8626	9,760.6344	10,699.4976	10,858.9272	11,011.271	10,784.5267	11,021.8997	10,990.0138	10,710.1262	11,181.3293	11,762.3616	11,326.5874	11,029.9068	11,220.5646	11,001.6612	10,814.8244	10,973.5547	10,606.7114	10,712.5316	10,328.0515	$ 10,000.0089
Thornburg International Equity Fund - Class A
Account Value [Line Items]
Account Value	18,995.3544	18,452.4431	18,020.7305	17,438.5726	17,615.1823	16,712.5105	16,908.7435	16,228.4691	15,737.8866	15,711.7222	15,170.2993	14,083.3094		14,396.6982	15,055.4543	15,592.6922	15,049.0586	14,435.0723		14,933.9361	14,652.5258	14,115.2878	14,786.8353	13,571.6542	13,585.8168	11,730.3465	11,441.0189	12,636.0676	13,252.4611	12,818.4697	13,831.1163	13,623.5552	14,573.3044	14,850.0525	15,806.0915		16,353.298	15,811.9318	16,416.1988	15,864.3938	16,344.4641	16,129.2601	16,543.1139	17,050.7745	16,294.8017	15,880.9479	15,781.623	15,356.7331	15,246.3722	14,635.7188	13,076.011	13,257.9195	13,552.1832	12,685.4427	11,877.555	11,379.9818	10,684.4493	10,026.3685	11,620.743	12,300.2248	12,460.7323	12,038.5937	11,861.6773	11,495.3903	11,374.9672	11,575.6724	11,676.025	11,068.8918	11,826.5539	11,189.3149		10,943.451	10,547.0583	9,684.0259	10,392.6453	10,224.5436	11,218.3217	11,233.1542	11,594.0786	11,267.7634	11,668.2412	11,915.4497	11,821.5105	12,103.3282	12,874.6187	12,113.2165	11,940.1705	11,832.6459	11,701.3603	11,386.6122	11,614.5133	11,272.6617	11,087.7675	10,684.1173		10,356.1515	9,872.6121	9,876.8168	9,691.8105	9,506.8041	9,683.4011	9,851.5887	9,736.6355	9,619.7792	9,248.343	9,696.2761	9,758.2727	9,535.0848	9,001.9136	9,258.1664	9,964.9282	10,080.6553	10,207.0458	9,668.1645	10,061.9372	10,774.3799	10,570.8248	10,873.1413	10,764.8291	10,076.523	10,100.9805	9,573.3956	9,377.735	9,804.3005	9,564.8	9,548.8
Thornburg International Equity Fund - Class C
Account Value [Line Items]
Account Value	18,440.8547	17,934.8103	17,525.5097	16,967.3724	17,153.4181	16,290.1659	16,491.0953	15,836.2142	15,374.8208	15,352.4953	14,835.2046	13,780.0804		14,102.5929	14,762.2776	15,304.685	14,776.9373	14,190.5509		14,688.9793	14,425.1054	13,904.6875	14,571.702	13,384.2696	13,403.028	11,591.808	11,309.2577	12,497.418	13,113.2328	12,693.0298	13,707.313	13,504.4563	14,453.5356	14,736.0859	15,692.4101		16,243.021	15,718.8225	16,329.5348	15,790.6476	16,273.1396	16,066.3573	16,486.188	17,000.0107	16,260.6074	15,853.3089	15,765.5831	15,352.0185	15,251.7604	14,643.9458	13,094.4645	13,288.5465	13,585.7344	12,730.5609	11,923.908	11,432.6381	10,735.1562	10,080.1297	11,687.3706	12,384.8525	12,536.479	12,124.0549	11,951.6837	11,586.9209	11,472.9325	11,683.811	11,792.1	11,187.9615	11,963.0826	11,330.447		11,085.3719	10,686.4125	9,820.1007	10,549.6264	10,390.0427	11,404.5394	11,427.3371	11,797.7994	11,478.6319	11,888.9901	12,151.1634	12,065.6721	12,362.042	13,154.2614	12,384.8397	12,213.8571	12,112.1953	11,987.525	11,670.6394	11,909.8899	11,565.3692	11,381.7643	10,975.9548		10,646.5329	10,154.7872	10,164.3357	9,982.9149	9,796.72	9,982.9149	10,164.3357	10,047.6649	9,938.5543	9,559.0391	10,030.528	10,101.1987	9,875.0525	9,328.5324	9,597.0811	10,341.4791	10,468.6864	10,602.1693	10,052.0754	10,465.91	11,212.3466	11,010.9272	11,330.63	11,224.1836	10,510.5984	10,546.0805	10,002.021	9,800.9556	10,254.3385	10,007.1914	10,000.0127
Thornburg International Equity Fund - Class I
Account Value [Line Items]
Account Value	20,558.3637	19,968.2688	19,493.4798	18,855.906	19,045.8216	18,069.1128	18,279.3765	17,533.2795	17,004.2289	16,963.5327	16,378.9746	15,200.3358		15,531.4978	16,246.8077	16,823.0296	16,233.5612	15,571.2372		16,101.0964	15,796.4274	15,213.5823	15,935.5154	14,624.1139	14,635.3572	12,635.4948	12,317.3348	13,609.4538	14,265.2528	13,797.7525	14,882.0935	14,648.3434	15,667.7538	15,953.4484	16,972.8588		17,557.2342	16,969.0655	17,621.285	17,023.0842	17,524.4334	17,290.8502	17,729.5308	18,265.0629	17,456.0676	17,005.9927	16,892.0498	16,441.9749	16,316.6376	15,655.41	13,980.8382	14,179.461	14,482.9125	13,561.5234	12,689.79	12,154.6119	11,409.7764	10,703.562	12,402.8904	13,125.6567	13,291.1757	12,836.6916	12,643.9997	12,250.9755	12,121.6913	12,333.7175	12,437.1449	11,785.5522	12,592.2859	11,909.6651		11,645.9252	11,216.7015	10,296.1977	11,048.4127	10,870.6222	11,922.1263	11,937.3655	12,313.2655	11,967.8439	12,384.3817	12,648.5277	12,546.9331	12,841.5574	13,649.2345	12,841.5574	12,648.7251	12,538.7143	12,394.5409	12,057.7565	12,292.6478	11,927.2613	11,726.0733	11,293.0573		10,946.6445	10,429.3591	10,429.3591	10,234.7008	10,035.7168	10,217.3979	10,390.4275	10,267.0469	10,142.6238	9,747.9024	10,218.4721	10,277.8572	10,040.3169	9,476.1589	9,743.3916	10,485.7049	10,605.1273	10,730.7992	10,165.2571	10,573.3445	11,316.7264	11,103.816	11,417.9514	11,299.612	10,571.6459	10,593.1622	10,040.912	9,829.3356	10,275.8545	10,019.7153	9,999.9979
Thornburg International Equity Fund - Class R3
Account Value [Line Items]
Account Value	19,533.0804	18,980.1938	18,535.1875	17,941.8457	18,123.8938	17,200.1685	17,409.1866	16,707.9646	16,209.0181	16,175.3055	15,622.886	14,506.316		14,830.1472	15,517.4624	16,079.2104	15,517.4624	14,889.6264		15,405.1128	15,120.9344	14,565.7952	15,259.7192	14,010.656	14,025.1034	12,119.0945	11,819.8575	13,062.3412	13,693.3407	13,250.9905	14,304.8249	14,083.6498	15,065.9274	15,345.6489	16,334.4317		16,906.8849	16,348.9257	16,979.6935	16,408.9475	16,905.4965	16,677.1981	17,110.9651	17,641.7589	16,859.8368	16,437.4848	16,334.7505	15,900.9836	15,786.8344	15,159.0138	13,542.3552	13,736.4512	14,041.4592	13,148.6176	12,311.232	11,801.0368	11,074.5632	10,398	12,050.5888	12,760.4256	12,926.7936	12,492.0079	12,308.1999	11,932.8546	11,812.9526	12,021.4778	12,130.9535	11,494.9517	12,287.3474	11,630.493		11,369.8365	10,957.9993	10,066.554	10,804.6038	10,634.5742	11,670.2086	11,685.6659	12,061.7918	11,726.8852	12,144.2304	12,401.8509	12,309.1075	12,602.7949	13,406.5708	12,618.2521	12,432.7653	12,330.2852	12,193.4782	11,866.4764	12,104.0699	11,747.6796	11,559.2027	11,138.2302		10,800.5752	10,296.2852	10,300.6704	10,112.1098	9,914.7789	10,103.3395	10,278.7447	10,159.4451	10,041.869	9,654.3034	10,127.1639	10,191.9432	9,958.7377	9,405.9544	9,673.7088	10,412.1928	10,533.1142	10,668.8708	10,109.4819	10,518.4209	11,266.8541	11,057.7331	11,374.2515	11,260.9112	10,540.6516	10,569.9007	10,021.4797	9,816.7359	10,267.7119	10,013.3904	9,999.9946
Thornburg International Equity Fund - Class R4
Account Value [Line Items]
Account Value	19,926.5966	19,357.6617	18,906.6768	18,289.1743	18,476.5065	17,532.9072	17,741.0541	17,026.4164	16,512.9874	16,478.2963	15,911.6941	14,772.0553		15,097.7598	15,796.6673	16,359.8646	15,789.8818	15,145.2583		15,674.5281	15,375.9657	14,812.7683	15,518.4614	14,242.7855	14,257.6858	12,312.2446	12,012.4334	13,264.9778	13,911.2374	13,458.1894	14,524.1846	14,297.6606	15,290.3686	15,576.8549	16,576.2254		17,149.1978	16,578.8532	17,216.9529	16,640.1413	17,135.3836	16,908.1548	17,339.3069	17,875.3338	17,082.9462	16,645.9677	16,541.0928	16,104.1143	15,981.7603	15,341.3804	13,705.2513	13,903.059	14,208.2481	13,303.9841	12,450.585	11,930.6331	11,201.5703	10,512.069	12,179.3057	12,897.0653	13,060.9631	12,621.2384	12,434.363	12,052.7458	11,925.54	12,137.5496	12,243.5544	11,607.5256	12,402.5616	11,734.7314		11,475.0196	11,056.3006	10,149.9596	10,891.7064	10,719.3197	11,764.0877	11,779.7592	12,155.8757	11,816.3261	12,234.2333	12,490.2014	12,396.1723	12,688.7074	13,493.1787	12,699.155	12,516.3206	12,407.2487	12,268.6951	11,935.7284	12,171.7708	11,815.4804	11,618.5649	11,197.1202		10,851.092	10,345.3583	10,345.3583	10,154.5991	9,959.4037	10,145.7266	10,318.7408	10,197.3017	10,078.4212	9,686.556	10,160.153	10,221.1749	9,985.8046	9,432.2484	9,698.1297	10,439.1105	10,561.1543	10,690.0081	10,129.7196	10,540.5747	11,287.399	11,072.9643	11,391.2094	11,273.4328	10,552.0508	10,577.8145	10,029.417	9,819.6274	10,269.0231	10,016.8484	10,000.0077
Thornburg International Equity Fund - Class R5
Account Value [Line Items]
Account Value	20,455.1039	19,873.9546	19,400.926	18,765.7164	18,954.9277	17,981.8405	18,191.3246	17,454.7517	16,920.9052	16,887.1175	16,300.7472	15,126.329		15,462.9097	16,169.069	16,749.8356	16,155.8698	15,495.9078		16,030.477	15,726.8945	15,146.1279	15,865.4865	14,558.7617	14,566.221	12,579.624	12,269.016	13,550.274	14,203.845	13,737.933	14,818.59	14,585.634	15,595.11	15,886.305	16,902.252		17,484.642	16,898.9175	17,543.5122	16,947.1804	17,452.6425	17,214.1099	17,657.0992	18,190.958	17,384.4903	16,935.8217	16,827.9141	16,373.566	16,254.2997	15,598.6568	13,927.8018	14,125.984	14,434.2673	13,509.4172	12,645.1228	12,111.132	11,367.9489	10,668.8063	12,364.3648	13,085.5276	13,250.6794	12,799.7251	12,607.4191	12,215.2112	12,086.1955	12,297.7813	12,400.9939	11,750.7545	12,555.8128	11,879.7703		11,611.4175	11,188.2458	10,269.6537	11,017.318	10,839.7829	11,889.7759	11,904.9932	12,280.353	11,935.4278	12,356.4395	12,615.1334	12,513.6848	12,807.8857	13,619.4746	12,812.9582	12,623.1128	12,512.5391	12,368.5664	12,031.8034	12,270.7883	11,905.7932	11,703.48	11,275.1457		10,929.0169	10,413.842	10,413.842	10,219.312	10,020.459	10,206.3433	10,379.2589	10,255.5804	10,126.9569	9,732.5115	10,208.0658	10,267.4151	10,025.779	9,466.2006	9,733.2721	10,475.1373	10,592.075	10,721.9069	10,156.6425	10,567.5684	11,310.7978	11,094.3232	11,409.3948	11,290.9954	10,566.2477	10,591.3627	10,035.2444	9,827.1485	10,272.7458	10,016.4359	9,999.994
Thornburg International Equity Fund - Class R6
Account Value [Line Items]
Account Value	20,885.981	20,290.4258	19,805.6716	19,154.716	19,341.6926	18,344.4839	18,552.2357	17,797.4042	17,257.2495	17,215.6992	16,616.7381	15,415.6524		15,753.1229	16,475.3098	17,055.7591	16,455.0616	15,780.1206		16,320.0734	16,009.6005	15,415.6524	16,144.5887	14,808.2055	14,817.4462	12,796.8853	12,473.3315	13,774.15	14,434.464	13,959.038	15,061.7623	14,824.0493	15,840.9329	16,131.471	17,161.5609		17,749.2403	17,154.8759	17,804.8332	17,197.8502	17,706.5598	17,463.7666	17,908.8874	18,452.2817	17,625.6287	17,168.9463	17,059.1113	16,596.6481	16,469.4707	15,802.7365	14,111.4064	14,307.0875	14,614.5865	13,680.9078	12,797.5472	12,260.8218	11,506.0516	10,790.4177	12,501.23	13,228.0457	13,395.7724	12,936.8293	12,742.0007	12,344.6302	12,213.9162	12,423.0586	12,527.6298	11,868.8312	12,679.258	11,994.3166		11,722.4315	11,288.461	10,363.0059	11,114.7368	10,935.3842	11,991.0024	12,006.3755	12,380.4538	12,031.9973	12,452.1948	12,713.5372	12,611.05	12,903.1385	13,717.9117	12,903.1385	12,710.0738	12,594.0386	12,448.7228	12,111.1408	12,343.4573	11,975.2576	11,772.8761	11,341.044		10,992.0888	10,473.5827	10,469.2295	10,273.3396	10,068.7434	10,251.5741	10,425.6984	10,298.2146	10,173.0477	9,771.6504	10,247.675	10,307.3537	10,064.3764	9,497.4293	9,761.7204	10,507.7034	10,622.8617	10,749.0676	10,181.2198	10,590.114	11,332.5809	11,115.2735	11,427.1607	11,308.465	10,578.3064	10,603.4843	10,045.9741	9,833.7606	10,276.2325	10,019.77	10,000.0072
Thornburg Better World International Fund - Class A
Account Value [Line Items]
Account Value	21,712.0672	21,577.2096	20,959.1125	20,206.1577	20,239.8721	19,408.2505	19,880.252	19,509.3937	18,823.8677	19,003.6778	18,337.1603	17,269.624		17,903.4737	18,748.6066	19,471.4177	18,937.6495	18,214.8385		18,570.6839	18,237.0788	17,647.7098	18,492.8427	16,947.1391	17,186.0435	15,267.8593	14,946.314	16,365.5485	17,174.9557	16,454.2507	17,563.0277	17,563.0277	19,148.5788	19,281.632	20,201.9169		20,789.5688	20,512.3745	21,337.3171	20,738.1714	21,598.2354	20,912.117	21,308.3262	19,858.7802	19,491.5619	18,824.7707	18,341.5887	17,162.6246	17,268.9247	16,495.8335	14,833.6874	15,133.2602	15,316.8694	14,408.4872	13,558.0869	12,804.323	12,021.5682	11,035.8769	12,611.0502	13,432.4596	13,722.3688	13,193.3266	12,847.6499	12,338.7371	12,156.2966	12,444.3605	12,694.0159	11,916.2433	12,751.6286	12,194.7051		12,050.6731	11,676.1901	11,090.4601	11,683.2545	11,550.8679	12,745.4824	12,657.6431	12,965.0807	12,736.6985	12,763.0503	12,894.8092	12,719.1306	12,798.186	13,448.1968	12,938.7289	12,613.7235	12,404.6427	12,096.4528	12,097.3444	12,063.147	11,746.8206	11,673.4353	11,274.1256		11,155.1824	10,700.6316	10,768.5183	10,615.7733	10,573.3442	10,993.3574	11,138.0069	10,584	10,416	9,872	9,984	10,072	9,968	9,440	9,480	9,944	10,000	9,920	9,552
Thornburg Better World International Fund - Class C
Account Value [Line Items]
Account Value	21,463.2616	21,337.0071	20,740.1678	20,005.5962	20,040.0293	19,236.5917	19,718.6542	19,362.8462	18,697.1407	18,880.7836	18,235.316	17,183.4984		17,823.7352	18,681.1952	19,412.8944	18,898.4184	18,189.5848		18,544.0016	18,223.8832	17,640.8104	18,509.7032	16,966.2752	17,274.9608	15,297.0864	14,988.4008	16,417.5008	17,252.0952	16,531.8288	17,652.2432	17,663.676	19,275.7008	19,412.8944	20,361.8168		20,956.3224	20,693.368	21,541.5949	20,945.4253	21,839.6797	21,154.0846	21,571.4034	20,120.724	19,763.0222	19,097.2995	18,620.3638	17,428.0246	17,557.1947	16,782.1742	15,093.027	15,410.9842	15,599.7712	14,685.6445	13,821.1986	13,056.1142	12,271.1576	11,267.6054	12,887.1995	13,721.837	14,019.9218	13,493.9731	13,146.4462	12,630.1205	12,451.3924	12,759.2019	13,007.4354	12,223.0175	13,076.9408	12,520.8977		12,381.887	11,994.6427	11,408.8117	12,023.7736	11,884.852	13,121.9029	13,039.4328	13,360.1497	13,131.0662	13,167.7196	13,314.333	13,131.0662	13,222.6996	13,900.7868	13,369.3131	13,048.5962	12,839.4418	12,518.0094	12,525.97	12,499.186	12,177.7784	12,105.0892	11,705.4348		11,581.0978	11,110.3937	11,190.3246	11,030.4628	10,994.938	11,425.942	11,594.0942	11,021.7764	10,845.897	10,284.7579	10,410.386	10,502.5133	10,402.0108	9,865.9974	9,899.4982	10,393.6356	10,460.6373	10,385.2604	10,000.0007
Thornburg Better World International Fund - Class I
Account Value [Line Items]
Account Value	24,122.7415	23,965.7082	23,265.0977	22,407.454	22,431.6129	21,501.4922	22,020.9103	21,598.1281	20,837.1202	21,018.3126	20,276.4397	19,087.2057		19,788.8538	20,704.5639	21,489.4584	20,894.8414	20,086.1623		20,466.7171	20,098.0546	19,432.0836	20,359.6861	18,647.1891	18,899.0654	16,776.8996	16,423.2053	17,967.6704	18,851.9062	18,050.1991	19,264.5495	19,252.7597	20,985.8618	21,115.5497	22,117.6836		22,742.5435	22,437.0878	23,324.3922	22,665.918	23,591.8974	22,830.5365	23,262.6603	21,678.2066	21,266.6602	20,525.8767	19,990.8664	18,694.4952	18,807.6705	17,964.0779	16,140.0015	16,457.6777	16,642.1349	15,648.1157	14,715.5823	13,885.5251	13,034.9726	11,948.7249	13,649.8298	14,520.8775	14,838.5538	14,253.7258	13,869.3102	13,312.9192	13,110.5952	13,424.1974	13,677.1024	12,827.3416	13,717.5672	13,110.5952		12,948.736	12,544.088	11,906.7674	12,537.4517	12,379.6109	13,659.9427	13,549.4104	13,881.0071	13,623.0986	13,650.7316	13,779.6859	13,586.2545	13,650.7316	14,341.5581	13,779.6859	13,429.6672	13,201.1733	12,868.8989	12,857.5856	12,812.7857	12,472.3061	12,377.4936	11,959.2749		11,816.9026	11,321.2477	11,383.4036	11,214.6948	11,161.4184	11,592.7144	11,744.1432	11,155.7797	10,971.5251	10,393.6356	10,510.8885	10,594.6406	10,477.3877	9,916.2486	9,941.3743	10,427.1365	10,485.7629	10,393.6356	10,000.0007
Thornburg International Growth Fund - Class A
Account Value [Line Items]
Account Value	16,776.8241	16,801.5869	16,163.9438	16,461.0979	16,232.0416	15,643.9242	16,324.9023	15,860.599	15,173.4302	14,950.5647	14,292.8144	12,866.0036		13,335.4305	14,175.4576	14,712.8279	14,484.2911	13,928.3908		14,286.6377	14,169.281	13,496.024	13,903.6842	12,674.5268	13,132.2459	11,493.7949	11,222.773	12,528.6061	13,193.8418	12,362.2971	13,471.0233	13,544.9384	14,653.6646	15,066.3571	15,805.5079		17,203.7349	16,834.1595	18,036.5673	17,459.7663	18,665.2804	18,192.3035	18,290.3597	18,013.4952	18,296.1277	17,407.8542	17,955.8151	17,932.7431	18,007.7272	17,136.7577	15,904.8781	16,155.4383	16,320.5803	15,608.7616	14,435.6843	13,701.0873	12,522.3154	11,463.1292	12,846.9048	13,478.9999	13,444.8325	12,868.7112	12,560.1031	12,157.8626	12,248.5083	12,480.7881	12,458.1266	11,919.9174	12,922.6862	12,276.8351		11,868.9292	11,579.9958	10,679.2036	11,570.9372	11,792.8224	12,983.0239	13,316.062	13,539.9072	13,370.6584	13,397.9566	13,174.1113	13,108.5956	13,305.1427	13,791.0506	12,868.3715	12,562.6316	12,560.6262	12,571.168	12,183.0146	12,272.5956	11,666.6066	11,645.5287	11,160.7375		10,607.4431	10,017.2625	9,954.0288	9,579.8965	9,543.0102	9,790.6753	10,127.9213	10,100.1688	9,852.6673	9,241.8124	9,794.7414	9,620.9637	9,752.6135	9,204.9505	9,373.4622	10,089.6368	10,194.9566	10,026.445	9,357.6642	9,731.5495	10,194.9566	10,068.5729	10,421.3942	10,431.9262	9,942.1891	10,115.9668	9,310.2703	9,489.314	9,800.0074	9,780	9,550
Thornburg International Growth Fund - Class C
Account Value [Line Items]
Account Value	16,197.0018	16,230.816	15,628.9232	15,933.251	15,723.603	15,162.2873	15,838.5713	15,398.9867	14,742.9912	14,540.106	13,911.1619	12,531.5425		12,998.1785	13,830.0078	14,371.035	14,154.6241	13,620.3598		13,985.5531	13,877.3477	13,228.115	13,640.6483	12,443.6256	12,903.4987	11,300.7056	11,043.7177	12,335.4202	12,998.1785	12,193.4005	13,295.7434	13,376.8975	14,479.2404	14,898.5365	15,642.4489		17,035.594	16,683.9263	17,888.7884	17,328.9775	18,542.9495	18,083.7788	18,190.7089	17,926.5285	18,222.159	17,347.8476	17,907.6585	17,895.0784	17,976.8486	17,121.4072	15,903.7484	16,164.2623	16,344.1408	15,637.0319	14,470.9224	13,739.0026	12,572.8932	11,512.2298	12,914.0422	13,552.9214	13,528.1105	12,957.4612	12,652.3114	12,257.505	12,356.2066	12,602.9605	12,584.454	12,047.7641	13,071.7931	12,424.0639		12,023.0886	11,733.1527	10,826.3318	11,739.3216	11,974.8685	13,186.0104	13,536.2916	13,773.7704	13,607.5352	13,649.094	13,423.4892	13,370.0564	13,577.8504	14,082.4928	13,150.3885	12,847.6031	12,851.1548	12,868.3125	12,479.4035	12,582.35	11,970.3902	11,953.2325	11,461.377		10,900.8905	10,294.65	10,237.4575	9,859.987	9,825.6715	10,088.757	10,443.3505	10,426.1928	10,174.5457	9,551.1475	10,123.0725	9,957.2143	10,094.4763	9,533.9897	9,717.0057	10,466.2275	10,580.6125	10,409.035	9,728.4443	10,123.0725	10,614.928	10,489.1045	10,866.575	10,883.7327	10,374.7195	10,563.4548	9,728.4443	9,917.1795	10,254.6153	10,238.4744	9,999.9922
Thornburg International Growth Fund - Class I
Account Value [Line Items]
Account Value	18,214.4928	18,240.329	17,542.7526	17,859.2456	17,607.343	16,961.439	17,691.3106	17,181.0464	16,431.7978	16,186.3542	15,468.0685	13,927.0405		14,421.4537	15,326.8076	15,904.6931	15,647.8551	15,050.7068		15,429.5428	15,294.7029	14,562.7146	15,005.7601	13,670.2025	14,160.7628	12,388.2766	12,094.9875	13,497.6745	14,205.3938	13,312.7748	14,498.6829	14,568.8173	15,754.7253	16,194.659	16,985.2644		18,483.5892	18,081.9106	19,365.1624	18,742.7963	20,035.4029	19,526.7383	19,622.4869	19,323.2724	19,622.4869	18,665.0005	19,245.4766	19,221.5395	19,293.351	18,353.8174	17,033.8304	17,299.7993	17,471.2015	16,702.8469	15,443.9275	14,651.9312	13,393.0117	12,252.3007	13,729.9057	14,403.6935	14,362.3206	13,741.9396	13,404.8983	12,976.8328	13,064.7915	13,316.9396	13,287.6201	12,707.093	13,774.3246	13,082.3832		12,642.59	12,331.8027	11,370.1215	12,316.7194	12,551.2152	13,807.4634	14,162.3676	14,398.9704	14,207.4348	14,235.6018	13,993.3656	13,925.7648	14,122.9338	14,641.2066	13,655.3616	13,328.6244	13,321.1009	13,326.5448	12,914.7275	13,007.1698	12,360.0739	12,330.3945	11,814.592		11,222.7765	10,592.9545	10,516.9415	10,120.588	10,082.5815	10,337.768	10,690.6855	10,663.0283	10,391.9803	9,746.8861	10,322.3754	10,138.4337	10,273.6849	9,689.3995	9,867.9312	10,619.9281	10,723.132	10,544.6835	9,841.7046	10,231.2988	10,711.3123	10,576.477	10,943.2289	10,948.6223	10,430.8549	10,603.4441	9,762.0721	9,940.0546	10,271.8171	10,246.0344	10,000.0066
Thornburg International Growth Fund - Class R3
Account Value [Line Items]
Account Value	17,321.9924	17,354.5403	16,697.0727	17,003.023	16,768.6781	16,163.2871	16,872.8314	16,391.1224	15,681.5782	15,453.7429	14,775.8638	13,300.2276		13,787.7726	14,658.853	15,217.9046	14,977.3824	14,405.3296		14,775.8638	14,652.3524	13,963.2888	14,392.3284	13,118.2108	13,590.06	11,896.17	11,617.1	12,973.51	13,661.45	12,804.77	13,953.5	14,024.89	15,173.62	15,601.96	16,367.78		17,815.05	17,438.63	18,692.1779	18,091.1628	19,347.8308	18,862.162	18,965.3666	18,680.0362	18,983.5792	18,060.8085	18,631.4693	18,613.2568	18,692.1779	17,793.6907	16,521.3501	16,785.0205	16,958.8033	16,221.7246	15,005.245	14,238.2038	13,021.7242	11,919.1024	13,357.3048	14,022.4734	13,986.5183	13,387.2673	13,068.4848	12,657.1137	12,746.5422	12,996.942	12,973.0944	12,412.6758	13,461.9702	12,788.2755		12,364.9806	12,066.8856	11,130.8673	12,060.9237	12,294.6545	13,536.7712	13,881.8036	14,123.3262	13,945.0595	13,979.5627	13,743.7906	13,680.5347	13,887.5541	14,399.3522	13,439.012	13,122.7323	13,115.0281	13,131.6786	12,726.5169	12,820.8696	12,193.7015	12,171.5009	11,660.8862		11,083.6695	10,467.6018	10,400.9998	10,012.4886	9,973.6375	10,234.495	10,584.1551	10,562.897	10,302.1532	9,664.1631	10,241.128	10,063.6004	10,196.7461	9,625.3289	9,802.8566	10,557.3492	10,668.304	10,490.7763	9,797.3088	10,185.6506	10,673.8518	10,540.706	10,912.4046	10,923.5001	10,407.5602	10,585.0879	9,747.3792	9,936.0023	10,263.319	10,242.2339	10,000.0011
Thornburg International Growth Fund - Class R4
Account Value [Line Items]
Account Value	17,491.8185	17,517.8965	16,852.9075	17,159.324	16,924.622	16,311.789	17,022.4145	16,533.452	15,822.8265	15,588.1245	14,902.8175	13,419.6912		13,907.5617	14,779.2237	15,345.1535	15,104.4707	14,525.531		14,896.3126	14,772.7187	14,076.6902	14,506.0162	13,218.0381	13,699.2974	11,987.6957	11,708.912	13,070.4134	13,764.1308	12,895.3633	14,055.8811	14,127.1979	15,281.2324	15,709.1328	16,487.1336		17,945.8851	17,563.3681	18,816.0307	18,215.3255	19,477.4133	18,985.9272	19,095.1463	18,803.8953	19,101.214	18,178.9191	18,749.2857	18,731.0825	18,803.8953	17,899.8035	16,615.9826	16,879.5382	17,053.2453	16,310.4977	15,088.5581	14,315.861	13,093.9214	11,979.8	13,429.3558	14,094.2347	14,058.2953	13,459.3053	13,134.6719	12,717.509	12,806.901	13,057.1988	13,033.3609	12,467.2112	13,522.0374	12,842.6578		12,419.5355	12,121.562	11,174.0063	12,109.643	12,343.2962	13,585.0997	13,935.7942	14,177.2559	13,993.2851	14,027.7796	13,792.0669	13,728.8269	13,930.0451	14,441.7141	13,475.867	13,159.667	13,151.9832	13,168.6313	12,762.378	12,856.7086	12,224.1386	12,201.9431	11,691.448		11,108.8177	10,487.3454	10,420.7591	10,026.79	9,993.4969	10,254.2933	10,603.8715	10,579.2304	10,313.0862	9,675.4492	10,257.6395	10,074.6654	10,213.2821	9,636.6365	9,814.0659	10,568.141	10,673.4898	10,501.605	9,802.9766	10,191.1035	10,673.4898	10,545.9623	10,917.4552	10,922.9999	10,412.8903	10,590.3197	9,747.5299	9,930.504	10,263.1842	10,242.1094	10,000.004
Thornburg International Growth Fund - Class R5
Account Value [Line Items]
Account Value	18,213.2717	18,239.024	17,537.2754	17,859.1784	17,608.0941	16,964.2881	17,698.2269	17,183.1821	16,436.3672	16,191.7209	15,470.856	13,927.6125		14,427.0855	15,329.979	15,906.294	15,656.5575	15,048.225		15,432.435	15,297.9615	14,567.9625	15,009.804	13,671.4725	14,164.1535	12,390.4557	12,098.018	13,502.9902	14,208.6549	13,312.27	14,501.0925	14,571.0233	15,759.8459	16,198.5023	16,986.8125		18,480.7874	18,080.275	19,372.4851	18,745.8335	20,040.9134	19,527.6559	19,629.1138	19,324.7402	19,623.1457	18,668.2481	19,247.1548	19,223.2823	19,294.8996	18,357.9064	17,035.5385	17,300.7977	17,477.6373	16,705.4381	15,449.8776	14,654.0999	13,392.6448	12,254.9774	13,728.6399	14,406.5246	14,365.2621	13,746.6772	13,410.5417	12,977.7549	13,071.3304	13,322.8147	13,287.7238	12,708.7253	13,778.9953	13,083.0274		12,644.3921	12,334.4232	11,375.2742	12,315.2241	12,549.3483	13,813.8371	14,162.274	14,398.3119	14,212.8535	14,240.9533	13,999.2954	13,926.2361	14,128.5543	14,645.5897	13,662.0984	13,330.5214	13,323.028	13,328.4593	12,917.8774	13,010.1092	12,364.4866	12,336.9226	11,816.7889		11,226.2203	10,592.3073	10,521.8725	10,126.3541	10,083.0097	10,343.0765	10,689.8324	10,666.2325	10,395.7905	9,752.1385	10,326.1062	10,142.5789	10,277.5254	9,694.5566	9,872.6859	10,622.9885	10,726.2341	10,548.1829	9,846.7693	10,235.6891	10,714.6461	10,580.1076	10,946.0524	10,951.4339	10,434.8061	10,607.0153	9,762.1136	9,945.0859	10,270.9927	10,245.5253	10,000.0009
Thornburg International Growth Fund - Class R6
Account Value [Line Items]
Account Value	18,399.7254	18,425.6132	17,713.6998	18,037.2968	17,778.4192	17,124.7532	17,869.0263	17,344.7992	16,594.0542	16,341.6485	15,612.276	14,056.8331		14,558.1743	15,470.8722	16,049.3426	15,792.2447	15,181.6369		15,560.8565	15,425.88	14,693.1507	15,130.2173	13,786.8802	14,278.8352	12,493.9808	12,194.3802	13,609.5148	14,323.4566	13,418.2804	14,610.3082	14,680.4274	15,878.8297	16,318.6688	17,115.4788		18,619.8561	18,211.8894	19,507.5918	18,879.087	20,177.997	19,663.2216	19,758.9938	19,453.72	19,753.008	18,789.3006	19,369.9194	19,339.9906	19,411.8197	18,466.0696	17,139.7577	17,405.8112	17,577.2679	16,802.7566	15,537.5244	14,739.3639	13,468.2194	12,321.2332	13,805.2205	14,479.2227	14,437.8366	13,815.9928	13,479.173	13,045.4953	13,133.4029	13,385.4048	13,350.2418	12,770.0513	13,836.6641	13,139.2634		12,699.7252	12,389.1181	11,422.134	12,370.815	12,604.9303	13,864.8608	14,219.2163	14,455.4533	14,264.2138	14,292.3373	14,044.8509	13,977.3547	14,174.2188	14,691.6903	13,701.7448	13,375.5128	13,362.4254	13,367.8617	12,953.6417	13,040.506	12,394.4527	12,367.5589	11,842.0866		11,251.6075	10,617.7904	10,547.3663	10,146.4905	10,103.1526	10,363.1801	10,709.8835	10,683.5404	10,413.2079	9,764.4099	10,343.6589	10,160.299	10,289.7295	9,707.292	9,885.259	10,634.8777	10,740.6756	10,557.4428	9,856.8468	10,243.2407	10,721.2944	10,587.0097	10,952.2642	10,957.6356	10,436.6108	10,613.8666	9,765.187	9,947.8143	10,275.8066	10,250.1372	10,000.0094
Thornburg Developing World Fund Class A
Account Value [Line Items]
Account Value	12,450.9206	11,842.2331	11,842.2331	12,152.0116	11,733.5389	11,548.7588	11,662.8877	11,402.0216	10,766.1605	11,233.5456	10,857.5635	10,066.3674		10,520.7706	10,948.4442	11,584.6086	11,124.8595	10,654.4186		10,916.3686	11,066.0544	10,734.6074	11,418.8851	10,584.9216	10,711.819	9,240.3283	9,720.2769	10,964.9786	10,975.527	11,044.091	11,988.1657	11,692.8127	12,763.4672	13,127.3842	13,765.5576		14,261.3286	13,929.0566	14,693.8098	14,546.1333	15,105.1942	14,720.1806	15,558.772	15,316.1606	15,163.21	14,920.5986	15,458.563	15,131.565	14,704.3581	13,686.4452	12,510.3075	12,088.3747	12,278.2445	11,893.2308	10,959.7045	10,131.6614	9,894.3242	9,013.5394	10,922.7854	11,555.6846	11,988.1657	11,174.545	11,127.5493	10,668.0352	10,511.3827	10,876.9052	11,049.223	10,255.517	10,965.675	10,641.9265		10,375.6172	10,192.856	9,289.4932	9,570.1836	9,109.5312	9,901.4393	9,958.3739	10,387.9711	10,139.5293	10,470.785	10,693.3474	10,884.8546	11,210.9344	11,795.8077	10,952.1409	10,698.5233	10,522.5437	10,279.2778	10,104.5723	9,949.7525	9,474.9718	9,257.5064	9,061.8528		8,768.3723	8,510.9333	8,356.4699	8,093.8822	8,129.9236	8,665.3967	8,742.6284	8,740.2313	8,642.6038	8,277.7852	8,195.5726	8,344.583	8,154.4662	7,455.6588	7,558.4246	7,892.4134	7,979.7644	8,118.4982	7,722.8499	8,045.1571	8,804.5214	9,194.4653	9,394.568	9,533.1007	9,122.6335	9,291.9512	9,230.3812	9,322.7363	9,799.9044	9,779.381	9,548.4932
Thornburg Developing World Fund Class C
Account Value [Line Items]
Account Value	12,055.1789	11,470.6853	11,487.5457	11,791.0327	11,397.6236	11,223.3996	11,341.4223	11,094.1366	10,487.1626	10,948.0132	10,588.705	9,823.5928		10,275.9584	10,700.4002	11,325.8933	10,884.6972	10,432.3317		10,694.8154	10,851.1887	10,532.8574	11,214.1981	10,398.8231	10,529.4546	9,092.1005	9,571.2185	10,802.4405	10,824.725	10,891.5787	11,833.1014	11,548.9732	12,618.6321	12,991.8985	13,627.0084		14,128.411	13,810.8561	14,579.6734	14,445.966	15,008.6512	14,635.3848	15,476.6269	15,248.2102	15,097.7894	14,869.3727	15,415.3444	15,097.7894	14,679.9539	13,671.5776	12,507.2093	12,089.3738	12,289.9348	11,911.0973	10,986.2881	10,161.7594	9,933.3426	9,053.1025	10,975.1458	11,626.9692	12,055.947	11,248.2383	11,209.3363	10,753.6271	10,603.5764	10,975.9243	11,159.3194	10,364.6069	11,087.0728	10,764.7419		10,509.1001	10,325.7049	9,414.2864	9,708.8302	9,247.5635	10,058.9483	10,120.08	10,564.6744	10,320.1475	10,664.7082	10,898.1202	11,098.1877	11,437.1909	12,048.5082	11,192.664	10,942.5797	10,764.7419	10,520.215	10,351.496	10,196.0848	9,718.7504	9,500.829	9,306.7082		9,007.2074	8,746.5309	8,596.7805	8,330.5576	8,374.9281	8,929.5591	9,018.3001	9,018.3001	8,924.0128	8,552.41	8,474.7617	8,635.6047	8,447.0301	7,726.0098	7,836.936	8,186.3536	8,280.6408	8,435.9375	8,031.0569	8,369.3818	9,168.0504	9,572.9311	9,789.2371	9,938.9875	9,517.468	9,694.9499	9,639.4868	9,739.3204	10,249.5809	10,232.9419	9,999.9969
Thornburg Developing World Fund Class I
Account Value [Line Items]
Account Value	13,576.9304	12,902.1212	12,902.1212	13,230.8744	12,775.234	12,561.8328	12,688.72	12,394.5724	11,702.4604	12,204.2416	11,795.0911	10,925.1467		11,416.6088	11,879.826	12,563.3538	12,060.5936	11,546.5356		11,823.3361	11,975.8588	11,619.9724	12,359.9901	11,450.5027	11,583.6013	9,990.648	10,506.8315	11,844.4682	11,855.569	11,922.1733	12,937.8892	12,615.9683	13,764.8928	14,153.418	14,836.1123		15,368.9468	15,002.6231	15,824.0764	15,663.1159	16,257.0044	15,840.7274	16,734.3354	16,473.4685	16,301.4073	16,034.99	16,606.6771	16,257.0044	15,790.7742	14,691.6829	13,428.1206	12,968.1396	13,167.6494	12,752.0039	11,754.4547	10,856.6605	10,601.7312	9,654.0595	11,693.4934	12,369.6101	12,824.0492	11,954.0536	11,899.369	11,407.2076	11,237.6853	11,620.4775	11,806.4051	10,953.3254	11,707.9729	11,352.523		11,073.6315	10,871.2985	9,903.3811	10,197.5139	9,706.5225	10,548.2221	10,602.1772	11,050.0045	10,785.6245	11,136.3326	11,373.7351	11,567.9734	11,913.2861	12,533.7697	11,632.7196	11,362.9441	11,168.7057	10,904.3257	10,716.5536	10,549.9472	10,044.7536	9,806.4698	9,597.5936		9,281.6014	9,006.3389	8,840.4467	8,562.176	8,594.2842	9,156.177	9,236.4474	9,227.3412	9,120.8514	8,737.4881	8,646.9718	8,801.382	8,599.0514	7,858.9472	7,960.1126	8,306.2044	8,396.4275	8,540.0927	8,125.0601	8,459.888	9,253.0025	9,654.8472	9,861.0569	10,003.8176	9,570.2483	9,744.7335	9,675.9969	9,771.1706	10,269.5516	10,243.1246	9,999.9957
Thornburg Developing World Fund Class R5
Account Value [Line Items]
Account Value	13,580.5717	12,909.0686	12,903.2798	13,233.2425	12,775.9257	12,567.5282	12,689.0934	12,399.6524	11,704.994	12,208.6214	11,798.3335	10,930.8924		11,424.1432	11,883.3768	12,563.7228	12,064.8024	11,548.8733		11,826.6813	11,979.7592	11,622.5775	12,365.2885	11,452.491	11,586.2864	9,993.172	10,511.2127	11,848.0919	11,859.2326	11,926.0765	12,945.4469	12,616.7975	13,769.8558	14,159.7789	14,839.3591		15,374.1108	15,006.469	15,830.8779	15,663.768	16,265.3636	15,842.0185	16,738.8417	16,477.0361	16,304.3559	16,042.5504	16,610.7241	16,259.7933	15,791.8855	14,693.483	13,431.0225	12,974.9795	13,175.1935	12,758.081	11,757.011	10,861.6095	10,605.7805	9,654.764	11,695.8345	12,374.3375	12,830.3805	11,957.2625	11,902.3875	11,408.5125	11,238.4	11,628.0125	11,809.1	10,953.05	11,710.325	11,359.125		11,073.775	10,870.7375	9,904.9375	10,201.502	9,708.7543	10,548.0499	10,602.198	11,051.6272	10,786.3015	11,138.2642	11,376.5158	11,571.449	11,917.9968	12,535.2851	11,636.4267	11,365.6862	11,170.753	10,905.4273	10,722.3376	10,549.7447	10,042.7529	9,809.1195	9,599.5		9,282.3832	9,006.4291	8,839.9418	8,566.0432	8,598.2666	9,162.1754	9,237.3632	9,234.3629	9,127.4837	8,737.3746	8,651.8712	8,806.8461	8,603.7756	7,860.9652	7,967.8444	8,309.8578	8,400.2132	8,544.4	8,127.8605	8,459.3536	9,254.9042	9,657.9831	9,864.8262	10,008.0253	9,567.8207	9,742.8418	9,673.8941	9,769.3601	10,270.4195	10,243.9084	10,000.0058
Thornburg Developing World Fund Class R6
Account Value [Line Items]
Account Value	13,714.2904	13,034.387	13,028.5759	13,359.8109	12,900.7308	12,685.7186	12,807.7526	12,517.1956	11,814.0476	12,319.6168	11,901.8026	11,026.0847		11,520.8085	11,987.0998	12,675.1639	12,169.0672	11,645.911		11,930.235	12,083.77	11,719.8353	12,464.7642	11,543.5544	11,676.247	10,074.3909	10,593.4592	11,938.5718	11,949.7346	12,016.7111	13,043.6851	12,714.3836	13,869.7293	14,260.4259	14,946.9356		15,482.7481	15,114.377	15,940.4213	15,772.9799	16,370.1875	15,946.0027	16,850.1862	16,582.28	16,409.2572	16,141.351	16,716.2331	16,359.0248	15,890.1889	14,784.1285	13,514.5311	13,046.7846	13,247.2474	12,829.6166	11,821.7344	10,919.652	10,663.5051	9,705.7386	11,754.9135	12,434.2595	12,896.4376	12,017.0627	11,962.1652	11,462.598	11,292.4157	11,682.188	11,857.86	11,001.459	11,759.0445	11,407.7005		11,122.2335	10,919.1127	9,941.9372	10,243.0419	9,750.64	10,589.3466	10,643.4567	11,092.5705	10,827.431	11,173.7356	11,411.8201	11,612.0275	11,952.9211	12,575.1872	11,671.5486	11,395.5871	11,206.2017	10,935.6512	10,750.636	10,578.1948	10,071.6485	9,837.0339	9,622.2515		9,305.4475	9,029.4801	8,863.1617	8,584.176	8,616.3667	9,179.7032	9,254.8147	9,248.5358	9,141.8014	8,752.2208	8,661.4966	8,816.2614	8,613.4661	7,876.9987	7,978.3964	8,325.2832	8,414.4167	8,553.0573	8,131.8032	8,465.44	9,264.3659	9,666.4743	9,867.5285	10,015.6737	9,576.529	9,745.8378	9,682.347	9,772.2923	10,274.992	10,248.551	10,000.0051
Thornburg Small/Mid Cap Core Fund - Class A
Account Value [Line Items]
Account Value	21,108.8572	20,805.1523	20,454.9341	19,480.8896	19,776.3862	19,010.2838	20,121.1323	19,119.727	17,959.6291	18,235.9732	16,941.8074	15,721.5157		16,602.5334	17,223.6236	17,393.2606	16,922.6548	15,521.7818		16,162.0246	16,186.6493	16,763.9622	17,385.0523	16,118.2473	17,139.305	16,327.0545	15,137.3948	16,690.7896	17,388.1763	16,127.4104	17,751.9114	17,716.3583	19,324.4501	19,045.4954	18,569.6315		20,035.5111	19,173.2063	20,437.3058	19,698.608	20,106.3046	19,601.7296	19,567.4185	19,440.2656	19,740.9923	18,745.9704	18,588.543	17,252.4284	17,601.5943	16,858.8599	15,365.3179	15,098.9023	15,583.2943	14,564.0528	13,807.1903	13,621.5067	13,143.1696	11,613.2982	14,297.6372	15,361.2813	15,756.8681	15,205.5242	14,742.3709	14,460.4515	14,136.2442	14,406.0813	14,138.2579	13,238.1295	14,476.5612	13,928.8321		13,654.9675	13,375.0618	12,227.2471	13,580.8369	13,352.3855	14,520.6942	14,554.7615	14,330.318	13,849.3676	13,847.3636	13,464.6072	13,298.2786	13,608.8924	14,286.2308	13,538.7538	13,511.333	13,218.3017	13,008.9937	12,863.4747	12,777.7581	12,564.4632	12,399.0102	12,173.7549		11,832.8818	11,649.488	11,224.8917	10,977.7089	10,881.9163	10,585.0099	10,776.3053	10,655.2105	10,625.4141	10,220.1823	10,293.6803	10,073.1865	10,041.4036	9,439.5154	9,654.0498	10,297.6531	10,422.7982	10,351.2867	9,767.2763	10,228.1281	10,790.2878	10,649.2512	10,722.7491	10,532.0519	10,303.6124	10,359.2324	9,773.2356	9,957.9736	9,984.0996	9,654.4734	9,549.2313
Thornburg Small/Mid Cap Core Fund - Class C
Account Value [Line Items]
Account Value	20,321.9267	20,048.4953	19,724.7776	18,800.768	19,102.4854	18,376.4778	19,463.9178	18,514.765	17,405.3248	17,688.1849	16,446.7434	15,274.4454		16,141.883	16,761.0324	16,940.1771	16,493.8867	15,142.444		15,780.4507	15,815.0225	16,393.3142	17,012.4636	15,786.7365	16,798.7471	16,019.3103	14,862.7268	16,399.6	17,100.4645	15,871.5945	17,483.8971	17,461.8968	19,064.7707	18,803.9109	18,345.0489		19,812.7786	18,973.6269	20,238.0153	19,521.0522	19,936.4888	19,451.8128	19,431.711	19,317.801	19,628.2616	18,652.209	18,507.0296	17,187.0133	17,548.8452	16,820.7144	15,339.884	15,085.2616	15,578.8718	14,569.3162	13,821.0836	13,644.6348	13,175.5935	11,647.859	14,352.6638	15,431.4588	15,833.4942	15,290.7464	14,835.1063	14,562.6156	14,243.2208	14,524.6456	14,261.0891	13,363.21	14,622.9209	14,080.1731		13,814.383	13,539.6589	12,387.1574	13,769.7125	13,550.8265	14,747.9986	14,794.9027	14,576.0168	14,100.2749	14,106.9755	13,725.0419	13,564.2277	13,890.3231	14,591.6515	13,836.7183	13,815.3249	13,523.8905	13,319.219	13,179.0636	13,098.9747	12,889.8539	12,727.4515	12,504.9825		12,162.3802	11,982.1803	11,550.5905	11,303.6499	11,212.4376	10,912.1045	11,116.7759	10,998.8674	10,974.3958	10,562.8281	10,645.1417	10,422.6727	10,395.9764	9,779.7372	10,008.8803	10,682.9614	10,818.6675	10,751.9268	10,151.2605	10,638.4676	11,228.0104	11,087.855	11,174.6179	10,981.0698	10,749.7021	10,814.2181	10,209.1024	10,407.0998	10,442.6949	10,102.3173	9,999.9816
Thornburg Small/Mid Cap Core Fund - Class I
Account Value [Line Items]
Account Value	22,957.5669	22,620.954	22,230.5961	21,164.1838	21,478.1672	20,638.0493	21,834.5809	20,739.8818	19,478.2905	19,769.6445	18,360.9619	17,031.4823		17,979.0901	18,646.6586	18,822.0367	18,307.217	16,785.3871		17,472.7564	17,492.5571	18,109.2094	18,773.9492	17,402.0394	18,495.1853	17,614.3282	16,325.4062	17,991.4363	18,740.0242	17,372.3035	19,114.3181	19,069.2902	20,794.4194	20,484.853	19,967.0328		21,534.5645	20,600.735	21,954.7616	21,156.5971	21,588.1506	21,041.3765	20,997.3832	20,857.0235	21,173.3564	20,102.8523	19,926.879	18,489.7639	18,860.5648	18,060.3053	16,455.5966	16,164.4027	16,677.6581	15,582.015	14,767.0911	14,565.9788	14,050.6284	12,410.3061	15,274.0617	16,405.3185	16,824.3025	16,230.5624	15,732.539	15,428.3071	15,078.2321	15,361.6262	15,071.9807	14,109.2744	15,422.0558	14,836.5136		14,540.6168	14,236.385	13,011.1223	14,446.8621	14,200.9141	15,438.9213	15,471.9899	15,228.1087	14,713.478	14,707.2776	14,295.9864	14,116.1757	14,442.7285	15,157.8379	14,360.0569	14,324.9128	14,010.5988	13,784.6214	13,626.3483	13,529.8822	13,300.0056	13,120.9636	12,879.1592		12,514.4033	12,315.6319	11,864.8101	11,598.4154	11,491.9085	11,174.7351	11,373.2242	11,243.056	11,208.512	10,775.696	10,850.88	10,613.136	10,576.56	9,940.544	10,164.064	10,836.656	10,964.672	10,885.424	10,267.696	10,749.28	11,334.496	11,182.096	11,258.4808	11,053.264	10,809.442	10,864.302	10,248.6514	10,437.6134	10,462.6583	10,113.6325	9,999.9962
Thornburg Small/Mid Cap Core Fund - Class R3
Account Value [Line Items]
Account Value	22,145.6292	21,828.1912	21,458.8088	20,434.3498	20,743.1304	19,940.878	21,100.9696	20,050.5384	18,835.6166	19,121.3108	17,764.9848	16,483.6896		17,407.1456	18,059.3364	18,235.3702	17,739.0126	16,270.1404		16,942.5318	16,965.6182	17,568.7504	18,220.9412	16,893.4732	17,961.2314	17,110.8762	15,862.7277	17,488.4915	18,217.7792	16,894.6842	18,595.3946	18,557.9213	20,241.3363	19,947.3152	19,445.7498		20,982.1542	20,077.4529	21,402.2038	20,630.9341	21,058.0008	20,531.0727	20,494.9527	20,363.2206	20,677.6777	19,638.6945	19,472.9672	18,072.7833	18,440.3581	17,662.7142	16,098.9277	15,820.5907	16,328.3964	15,259.6672	14,465.0257	14,271.6771	13,770.2455	12,166.0895	14,979.2055	16,094.6782	16,508.9967	15,929.479	15,445.9321	15,153.2589	14,811.8069	15,095.9968	14,813.9277	13,872.2836	15,170.2255	14,595.4832		14,309.1725	14,014.3786	12,811.8736	14,231.2571	13,992.4847	15,218.0421	15,253.9636	15,017.3042	14,514.4031	14,514.4031	14,112.9274	13,939.6589	14,265.0655	14,975.0436	14,191.1095	14,161.3894	13,854.5382	13,635.9594	13,482.0848	13,391.7138	13,168.9389	12,994.502	12,759.1172		12,401.8367	12,208.4849	11,765.0367	11,504.4321	11,403.6145	11,090.64	11,292.288	11,164.1022	11,132.7012	10,707.741	10,785.1968	10,552.8294	10,519.335	9,889.2216	10,113.2154	10,787.2902	10,917.081	10,841.7186	10,228.3524	10,711.9278	11,300.1732	11,151.5418	11,228.9976	11,030.1246	10,789.3836	10,847.9988	10,234.6326	10,427.2254	10,456.1725	10,108.8192	10,000.0097
Thornburg Small/Mid Cap Core Fund - Class R4
Account Value [Line Items]
Account Value	22,369.0115	22,045.3625	21,670.1589	20,633.3366	20,945.529	20,132.1103	21,300.6835	20,238.0839	19,009.3635	19,298.6427	17,926.7149	16,634.9832		17,562.9678	18,218.8581	18,396.4354	17,895.2092	16,411.5795		17,087.5189	17,107.5679	17,717.6319	18,373.5223	17,030.2359	18,108.4211	17,248.2925	15,990.9617	17,625.4918	18,362.7448	17,025.4021	18,737.0865	18,697.0805	20,391.6195	20,094.4322	19,588.6424		21,134.5877	20,222.8308	21,554.9746	20,775.1152	21,202.0301	20,669.4432	20,633.5147	20,498.2546	20,813.1571	19,764.8909	19,597.9291	18,188.2646	18,556.0032	17,771.917	16,195.2907	15,914.2032	16,423.5422	15,347.8013	14,548.921	14,352.371	13,847.2589	12,232.5907	15,060.3734	16,180.4966	16,596.8443	16,012.7287	15,525.8338	15,228.6382	14,885.0717	15,169.6207	14,885.0717	13,936.5752	15,239.1771	14,661.6481		14,372.8836	14,075.6881	12,867.9358	14,290.5542	14,051.3993	15,278.6416	15,314.305	15,077.2479	14,569.5682	14,567.4704	14,164.6832	13,988.4638	14,313.6305	15,026.8996	14,238.1079	14,206.0252	13,897.244	13,676.0898	13,522.1766	13,430.4018	13,205.1365	13,028.8525	12,793.2532		12,432.5569	12,238.6565	11,792.4772	11,529.7735	11,426.7908	11,114.2988	11,314.2937	11,187.1313	11,153.9413	10,726.619	10,803.371	10,568.9661	10,533.7016	9,903.0901	10,127.1232	10,801.2967	10,929.9082	10,853.1562	10,239.1397	10,722.4702	11,309.5198	11,160.1644	11,236.9165	11,035.7016	10,795.0735	10,851.0818	10,239.1397	10,429.9826	10,456.0607	10,109.8747	10,000.0073
Thornburg Small/Mid Cap Core Fund - Class R5
Account Value [Line Items]
Account Value	22,953.9405	22,616.7575	22,228.5721	21,160.354	21,474.8691	20,636.162	21,831.8863	20,738.1669	19,474.4393	19,766.2867	18,358.0521	17,029.1547		17,978.3672	18,644.2326	18,819.9077	18,304.2162	16,785.4763		17,471.176	17,491.0103	18,108.7068	18,774.5722	17,400.3393	18,492.707	17,613.0417	16,324.5576	17,990.8466	18,737.9982	17,370.5698	19,112.9838	19,067.8727	20,790.5506	20,483.2316	19,964.4546		21,534.8827	20,599.1696	21,952.9538	21,153.711	21,585.8475	21,038.3348	20,996.3798	20,853.7327	21,170.493	20,100.6405	19,924.4295	18,487.4707	18,858.7725	18,057.432	16,452.6532	16,163.1638	16,677.1125	15,582.087	14,766.0623	14,564.6782	14,048.6318	12,408.1913	15,271.62	16,402.3073	16,823.955	16,229.3415	15,730.6512	15,428.0986	15,077.5548	15,361.3283	15,069.2085	14,107.2998	15,421.8389	14,835.5127		14,539.2198	14,236.6671	13,009.764	14,445.5288	14,201.3207	15,438.9176	15,469.961	15,225.7529	14,712.502	14,706.2934	14,296.5205	14,116.4688	14,441.3897	15,157.4574	14,358.6073	14,323.2392	14,008.5105	13,784.2921	13,625.7108	13,529.1183	13,298.9404	13,119.9125	12,877.7872		12,514.5991	12,315.5638	11,864.1436	11,597.3953	11,490.792	11,173.197	11,371.95	11,241.9938	11,207.403	10,774.0013	10,849.287	10,611.2213	10,574.5957	9,939.7538	10,161.5415	10,837.0785	10,963.233	10,883.8777	10,265.3138	10,749.5843	11,333.5575	11,182.986	11,256.237	11,052.762	10,808.592	10,863.5302	10,247.001	10,436.2328	10,461.3023	10,111.7794	10,000.0133
Thornburg Small/Mid Cap Growth Fund - Class A
Account Value [Line Items]
Account Value	19,136.4969	19,066.8636	18,579.4305	18,142.6398	18,224.9337	17,515.9401	18,687.0456	18,123.6489	16,522.083	16,446.1194	15,135.7473	13,945.6509		15,369.9684	16,205.568	16,452.4497	16,256.2104	14,812.902		14,825.5626	14,648.3142	14,426.7537	14,907.8565	13,755.7419	14,616.6627	14,160.8811	13,401.2451	14,578.6809	14,831.8929	13,356.933	14,648.3142	15,407.9502	17,794.4733	17,984.3823	17,781.8127		20,902.6506	21,143.202	23,087.0874	21,910.5136	22,769.6664	22,574.9815	22,206.7732	21,250.2779	22,185.6118	20,822.8176	22,257.5605	21,847.0294	21,847.0294	20,801.6562	18,671.9751	19,104.2702	20,040.2485	18,648.179	17,609.0844	16,807.9504	15,300.8666	13,448.7399	15,233.4444	15,975.0883	15,423.8129	15,189.8183	14,445.64	14,218.1212	14,395.0803	14,853.7293	14,535.9252	13,665.5754	14,933.1803	14,113.3903		13,842.5345	13,300.823	11,964.6013	13,073.3042	13,224.9834	14,600.9306	14,817.6152	13,994.2138	13,860.5916	13,568.0674	13,214.1492	13,008.2988	13,073.3042	13,163.5895	12,278.794	12,054.8866	11,827.3677	11,722.6369	11,578.1805	11,715.414	11,357.8845	11,271.2106	11,079.8059		10,812.5615	10,718.6649	10,426.1407	9,909.709	10,083.0567	10,003.6057	10,191.399	10,028.8856	9,877.2064	9,321.0492	9,563.0137	9,306.6036	9,418.5573	8,710.7209	8,974.3539	10,148.0621	10,433.3635	10,108.3366	9,422.1687	9,758.0298	10,440.5863	10,335.8554	10,306.9641	10,238.3473	10,227.5131	10,227.5131	9,682.1902	9,873.5949	9,895.2634	9,945.8231	9,548.568
Thornburg Small/Mid Cap Growth Fund - Class C
Account Value [Line Items]
Account Value	18,461.7927	18,410.652	17,950.3857	17,541.2601	17,643.5415	16,961.6655	18,112.3313	17,583.8774	16,032.6095	15,981.4688	14,711.4747	13,569.3324		14,967.1782	15,785.4294	16,049.6564	15,870.6639	14,464.2947		14,489.865	14,327.9195	14,123.3567	14,600.6699	13,484.0979	14,344.9664	13,910.2704	13,168.7302	14,336.4429	14,592.1464	13,151.6833	14,438.7243	15,197.3114	17,558.307	17,762.8698	17,575.3539		20,686.4131	20,942.1167	22,877.1878	21,726.4546	22,592.0504	22,413.8395	22,062.5094	21,125.6293	22,072.6929	20,728.4735	22,169.436	21,772.2802	21,787.5555	20,759.024	18,649.1862	19,091.9807	20,043.5179	18,658.6074	17,631.7009	16,835.6129	15,337.6485	13,486.3905	15,290.5427	16,044.2355	15,502.5188	15,276.4109	14,537.7784	14,314.0553	14,504.0088	14,972.5609	14,660.1929	13,794.8489	15,082.3119	14,263.401		14,001.6872	13,461.3749	12,119.0365	13,254.5366	13,414.9418	14,820.5981	15,056.9847	14,229.6315	14,107.217	13,815.9549	13,465.5961	13,262.979	13,338.9604	13,440.269	12,545.3767	12,325.8748	12,097.9305	12,000.8432	11,857.3227	12,005.0644	11,650.4844	11,566.0606	11,376.1071		11,110.1721	11,021.5271	10,730.265	10,202.6162	10,388.3486	10,312.3672	10,510.7631	10,350.3579	10,198.395	9,632.7556	9,890.2482	9,632.7556	9,750.9489	9,024.9042	9,303.5028	10,523.4267	10,827.3524	10,498.0995	9,793.1608	10,147.7408	10,865.3431	10,759.8133	10,738.7074	10,675.3895	10,671.1683	10,679.6107	10,113.9712	10,320.8095	10,350.3579	10,409.4545	9,999.9991
Thornburg Small/Mid Cap Growth Fund - Class I
Account Value [Line Items]
Account Value	20,857.7612	20,774.5204	20,233.4553	19,751.8479	19,835.0887	19,056.1928	20,322.6419	19,704.2818	17,950.2796	17,867.0389	16,434.1083	15,137.9304		16,671.9391	17,569.7503	17,837.31	17,617.3165	16,041.6875		16,053.579	15,851.4228	15,607.6463	16,118.9825	14,870.3708	15,797.9109	15,298.4662	14,472.0042	15,732.5074	16,000.0671	14,406.6007	15,786.0194	16,600.5898	19,157.2709	19,359.4271	19,133.4879		22,486.9021	22,736.6245	24,819.5573	23,545.802	24,466.8889	24,251.1388	23,848.6819	22,815.571	23,811.3406	22,342.5804	23,873.5762	23,429.6289	23,421.3308	22,296.941	20,010.0686	20,467.4193	21,464.2092	19,967.0698	18,849.1016	17,985.217	16,366.8993	14,381.1374	16,288.7197	17,078.3336	16,484.1687	16,226.176	15,430.1101	15,179.2141	15,365.594	15,845.8808	15,501.7948	14,573.4792	15,917.5654	15,039.4291		14,749.1065	14,164.877	12,741.9376	13,917.5651	14,071.687	15,530.4686	15,759.8593	14,881.723	14,731.1853	14,415.7731	14,039.4289	13,817.2067	13,881.7228	13,974.9128	13,028.676	12,788.5326	12,541.2208	12,426.5254	12,268.8193	12,408.6043	12,028.6759	11,931.9017	11,724.0163		11,437.2779	11,336.9195	11,025.0915	10,473.1201	10,652.3316	10,562.7258	10,756.2742	10,587.8154	10,419.3566	9,831.5429	10,086.0232	9,810.0375	9,921.1486	9,175.6288	9,451.6145	10,681.0054	10,974.9123	10,630.8262	9,906.8117	10,254.482	10,971.328	10,853.0484	10,820.7904	10,745.5215	10,731.1846	10,727.6004	10,150.5394	10,351.2562	10,372.7616	10,419.3566	10,000.0017
Thornburg Small/Mid Cap Growth Fund - Class R3
Account Value [Line Items]
Account Value	19,823.8896	19,756.917	19,247.9252	18,799.2088	18,886.2732	18,149.5746	19,368.4759	18,785.8143	17,118.1966	17,044.5267	15,684.9829	14,452.6871		15,926.0843	16,796.7281	17,057.9212	16,850.3062	15,356.8172		15,370.2117	15,182.6884	14,954.9816	15,457.2761	14,258.4665	15,155.8994	14,680.3939	13,896.8145	15,115.7158	15,376.909	13,849.9337	15,182.6884	15,972.9651	18,444.254	18,645.1718	18,430.8595		21,672.3334	21,926.8292	23,941.4308	22,722.7884	23,621.2036	23,421.0616	23,043.0156	22,055.6484	23,029.6728	21,615.336	23,109.7296	22,687.2076	22,687.2076	21,610.8884	19,399.3589	19,853.3156	20,827.8647	19,382.7	18,308.197	17,475.249	15,909.3068	13,985.1969	15,846.8357	16,617.3126	16,046.7432	15,805.1883	15,035.9821	14,797.2555	14,986.721	15,460.3848	15,134.5041	14,228.8591	15,551.3282	14,698.7335		14,422.1139	13,857.5067	12,466.8299	13,626.3588	13,785.5098	15,217.869	15,449.0169	14,592.6328	14,456.2176	14,153.0728	13,785.5098	13,573.3084	13,641.516	13,740.0381	12,815.4464	12,584.2985	12,345.572	12,239.4713	12,087.8989	12,231.8927	11,860.5403	11,769.5969	11,572.5527		11,292.1438	11,197.411	10,894.2663	10,352.3949	10,534.2818	10,450.917	10,647.9611	10,485.0208	10,325.8697	9,742.316	9,999.9891	9,730.9481	9,848.4167	9,109.5012	9,386.1209	10,613.8573	10,913.2128	10,572.1749	9,855.9953	10,208.4011	10,924.5807	10,814.6907	10,784.3763	10,716.1687	10,704.8007	10,708.5901	10,136.4043	10,337.2377	10,363.7629	10,416.8132	9,999.9891
Thornburg Small/Mid Cap Growth Fund - Class R4
Account Value [Line Items]
Account Value	20,026.1239	19,960.1617	19,445.6566	18,983.9212	19,076.2682	18,330.8954	19,557.7923	18,964.1325	17,282.0964	17,209.538	15,837.5242	14,590.8386		16,074.9881	16,952.2854	17,209.538	17,005.0552	15,494.5208		15,507.7132	15,316.4228	15,085.5551	15,586.8679	14,379.7596	15,283.4417	14,808.5139	14,010.3713	15,237.2682	15,501.117	13,957.6015	15,303.2304	16,101.373	18,588.148	18,786.0346	18,574.9555		21,840.0844	22,090.7408	24,120.9252	22,889.5001	23,789.8969	23,591.28	23,207.2872	22,209.7887	23,189.6323	21,768.4177	23,264.6654	22,836.5355	22,840.9492	21,750.7629	19,525.0824	19,980.1161	20,960.5069	19,500.2624	18,420.5915	17,580.8475	16,004.7762	14,068.8147	15,938.5895	16,716.2835	16,137.1497	15,893.0861	15,116.8148	14,879.4371	15,064.0642	15,542.5875	15,211.0123	14,302.9484	15,629.2492	14,770.168		14,487.5755	13,922.3905	12,524.4996	13,685.0128	13,843.2646	15,282.6024	15,512.4443	14,653.3631	14,513.9508	14,204.983	13,835.7288	13,624.7264	13,692.5486	13,786.7461	12,859.8427	12,626.2329	12,385.0873	12,279.5861	12,125.1022	12,272.0503	11,895.2603	11,804.8307	11,605.132		11,322.5395	11,228.342	10,923.1421	10,380.5645	10,561.4237	10,478.5299	10,674.4607	10,504.9052	10,346.6534	9,762.6289	10,018.8461	9,747.5573	9,864.3622	9,125.8538	9,400.9105	10,629.2459	10,926.91	10,587.799	9,868.1301	10,218.5448	10,934.4458	10,825.1767	10,795.0335	10,723.4434	10,712.1397	10,712.1397	10,139.4189	10,342.8855	10,365.4929	10,418.2435	10,000.0066
Thornburg Small/Mid Cap Growth Fund - Class R5
Account Value [Line Items]
Account Value	20,858.9626	20,775.5744	20,233.5511	19,751.0908	19,834.479	19,054.2037	20,322.8956	19,703.4404	17,952.2882	17,868.9	16,433.4317	15,134.9583		16,671.6837	17,571.085	17,839.1185	17,618.7354	16,046.2722		16,052.2285	15,849.7143	15,605.506	16,123.7041	14,866.9248	15,796.1076	15,295.7784	14,473.809	15,730.5883	15,998.6218	14,402.3334	15,784.195	16,600.2081	19,161.4171	19,357.975	19,131.6356		22,485.0325	22,741.1534	24,821.6438	23,546.289	24,464.3783	24,252.5115	23,849.5492	22,815.141	23,812.161	22,345.7108	23,874.4748	23,429.97	23,421.6615	22,295.8598	20,010.1857	20,468.0757	21,466.0412	19,967.1362	18,851.763	17,986.8596	16,366.6334	14,382.4432	16,288.3616	17,074.9932	16,484.0411	16,225.7441	15,428.787	15,181.2088	15,364.2014	15,845.0054	15,504.1369	14,571.2335	15,920.3553	15,041.2733		14,747.0499	14,165.7793	12,741.3076	13,918.2011	14,072.489	15,532.8416	15,762.4794	14,879.8092	14,732.6975	14,416.9456	14,036.6081	13,814.1465	13,882.3202	13,975.6105	13,031.9429	12,787.9528	12,540.3746	12,429.1438	12,267.6797	12,411.2033	12,027.2777	11,930.3993	11,725.8781		11,438.8309	11,338.3644	11,026.2006	10,473.6347	10,653.0392	10,563.337	10,757.0938	10,584.8655	10,419.8134	9,831.3666	10,086.121	9,809.8381	9,921.0689	9,174.7461	9,451.0291	10,678.1558	10,975.9673	10,631.5107	9,906.7165	10,254.7612	10,968.7911	10,853.9723	10,821.6794	10,746.3296	10,731.9772	10,728.3891	10,150.7066	10,351.6396	10,373.1682	10,419.8134	10,000.0068
Thornburg Investment Income Builder Fund - Class A
Account Value [Line Items]
Account Value	18,696.1115	18,672.2149	18,248.5258	17,585.7243	17,580.0418	16,918.6231	17,148.9407	16,314.9918	16,284.2824	16,222.8636	15,573.9307	14,701.453		14,977.7232	15,216.8431	15,437.3	15,013.9259	14,473.1294		14,892.0457	14,513.2809	14,537.0848	14,601.2351	13,760.3738	14,095.4828	13,012.7628	12,251.2618	13,312.9476	13,691.7097	13,423.3405	14,530.6992	14,017.2186	14,689.3904	14,647.893	15,087.8288		15,001.5348	14,295.1327	14,452.4358	13,894.1837	14,272.5108	13,993.3323	13,977.523	14,132.9821	13,803.1149	13,570.861	13,128.5499	12,695.1968	12,498.8485	12,078.6911	10,593.0346	10,780.8112	11,159.6535	10,934.8001	10,687.2805	10,467.0317	10,097.8433	9,312.5587	11,526.9291	12,386.1866	12,580.755	12,257.6729	12,174.5335	11,949.6806	11,583.2064	11,674.1254	11,735.775	11,190.5954	11,803.3827	11,446.8494		11,325.6688	11,165.3008	10,692.1638	11,197.727	11,004.9345	11,473.4082	11,299.2575	11,476.2682	11,024.6322	11,025.345	11,163.8188	10,937.3901	11,031.3439	11,579.7753	11,210.4843	11,116.7465	10,847.1963	10,848.3625	10,630.5538	10,637.9413	10,418.3077	10,412.4299	10,181.5607		10,129.2383	9,977.5625	9,799.5879	9,767.0867	9,561.0834	9,452.5016	9,599.4675	9,605.195	9,521.4657	9,279.9092	9,296.4935	9,190.4544	9,055.7193	8,577.6893	8,639.9506	8,919.4855	9,195.971	9,280.7869	8,859.9984	9,268.0964	9,875.8726	9,742.1991	9,988.2825	10,055.8788	9,748.6944	9,838.9889	9,479.7737	9,425.445	9,643.6575	9,560.472	9,548.9066
Thornburg Investment Income Builder Fund - Class C
Account Value [Line Items]
Account Value	18,186.007	18,180.728	17,778.3772	17,142.4375	17,147.567	16,511.4523	16,747.3006	15,941.1684	15,920.874	15,871.1613	15,249.129	14,401.606		14,682.2229	14,925.7105	15,145.3117	14,741.8045	14,217.8068		14,639.5661	14,275.1388	14,308.3826	14,379.9154	13,565.2694	13,903.8525	12,835.0987	12,090.2961	13,154.5961	13,532.333	13,275.128	14,377.1095	13,882.9367	14,559.5566	14,521.9149	14,968.3749		14,892.5591	14,203.4347	14,369.6496	13,822.7948	14,209.0203	13,939.6377	13,933.0645	14,091.6048	13,776.7167	13,553.3117	13,119.1169	12,692.8315	12,504.6796	12,095.7796	10,611.1234	10,806.6798	11,187.6785	10,974.1097	10,726.1153	10,510.5864	10,150.6172	9,365.7033	11,603.4576	12,478.2018	12,682.6003	12,363.2446	12,292.387	12,067.1104	11,702.82	11,801.795	11,871.2877	11,330.7055	11,954.1198	11,604.5201		11,488.7509	11,332.1381	10,852.5217	11,379.0385	11,189.6791	11,673.8413	11,503.3032	11,691.3999	11,238.0009	11,245.4687	11,394.2868	11,169.7693	11,273.5209	11,841.7339	11,470.7579	11,385.9106	11,115.9404	11,118.7596	10,901.3841	10,920.7351	10,701.5728	10,696.7363	10,465.5773		10,417.9102	10,267.7966	10,094.8963	10,062.4219	9,859.6668	9,753.1336	9,910.7573	9,922.7614	9,842.2199	9,598.0899	9,621.4687	9,517.262	9,383.1318	8,892.486	8,961.9787	9,257.5298	9,549.368	9,643.2547	9,211.3269	9,646.7727	10,281.4138	10,148.3391	10,410.955	10,488.1876	10,173.77	10,274.4904	9,904.4979	9,853.8977	10,087.3471	10,006.1193	10,000.006
Thornburg Investment Income Builder Fund - Class I
Account Value [Line Items]
Account Value	20,111.2964	20,088.6877	19,624.7571	18,905.7536	18,902.75	18,185.8363	18,420.0358	17,526.9209	17,490.3509	17,420.7858	16,725.8946	15,785.69		16,076.0482	16,327.1209	16,557.8746	16,104.4	15,518.4259		15,967.3867	15,560.9396	15,582.2263	15,647.168	14,742.6691	15,102.1755	13,934.7399	13,115.4337	14,253.6782	14,652.417	14,364.0028	15,542.2371	14,993.759	15,710.3024	15,656.155	16,125.843		16,030.4615	15,271.6518	15,441.3939	14,839.7713	15,242.9689	14,936.785	14,916.0284	15,077.2848	14,724.7735	14,475.7821	14,004.6184	13,537.2106	13,326.5779	12,873.4585	11,287.6059	11,489.996	11,888.4439	11,648.271	11,378.1236	11,143.2836	10,751.0129	9,913.0529	12,265.675	13,175.9325	13,378.2285	13,034.3343	12,943.6047	12,703.3362	12,308.4714	12,401.5645	12,463.8047	11,886.3101	12,535.1532	12,156.7468		12,025.9286	11,854.4358	11,342.0757	11,882.7464	11,671.4541	12,167.3558	11,981.2661	12,164.618	11,681.1752	11,679.1304	11,821.8151	11,580.9958	11,676.6864	12,261.0001	11,863.9209	11,762.1862	11,475.7266	11,468.091	11,236.1982	11,245.849	11,006.9238	10,997.5465	10,752.3602		10,689.3579	10,527.3713	10,343.3838	10,301.1495	10,082.9683	9,966.4467	10,122.1883	10,120.2395	10,029.6416	9,774.2417	9,788.5738	9,674.9104	9,526.4755	9,024.6026	9,087.1284	9,376.3208	9,667.2898	9,752.9734	9,311.1707	9,738.6443	10,369.0431	10,226.7677	10,480.3197	10,552.489	10,224.9708	10,320.7348	9,939.5484	9,880.0996	10,104.6021	10,015.0382	9,999.996
Thornburg Investment Income Builder Fund - Class R3
Account Value [Line Items]
Account Value	18,916.8624	18,905.376	18,474.6399	17,815.544	17,815.068	17,149.5846	17,381.5617	16,540.4576	16,521.1202	16,464.0442	15,808.8049	14,926.8567		15,212.5666	15,460.1766	15,682.5467	15,261.9611	14,715.9906		15,147.1383	14,766.0417	14,795.3445	14,864.9815	14,012.8564	14,364.9031	13,258.3365	12,485.7363	13,579.0033	13,969.9137	13,693.817	14,829.6907	14,309.6825	15,001.1731	14,957.3316	15,417.9876		15,334.7247	14,615.9475	14,781.6842	14,214.9083	14,606.6222	14,325.2015	14,313.5607	14,471.4661	14,143.807	13,910.0734	13,460.5217	13,019.618	12,822.3205	12,394.1611	10,871.168	11,073.3377	11,459.6049	11,237.3037	10,979.9412	10,757.5835	10,387.7712	9,583.4848	11,862.3432	12,750.6436	12,954.4395	12,624.3772	12,547.2979	12,312.8367	11,938.5933	12,036.2058	12,103.7341	11,544.1891	12,180.4392	11,821.089		11,699.4677	11,536.9214	11,045.7875	11,577.3645	11,381.3703	11,869.5295	11,692.6186	11,879.8036	11,410.5553	11,414.7129	11,561.8758	11,330.391	11,431.4595	12,008.489	11,628.7046	11,534.1332	11,257.2833	11,256.3063	11,031.7344	11,047.5588	10,822.3355	10,813.8867	10,576.8243		10,525.2662	10,370.3021	10,187.6211	10,156.5649	9,949.3697	9,833.7343	9,994.2746	9,998.0618	9,913.5928	9,669.4684	9,684.5399	9,576.5062	9,438.4681	8,942.1722	9,014.1358	9,303.2182	9,593.8322	9,684.9384	9,252.9062	9,681.7097	10,319.5597	10,177.8178	10,437.791	10,516.3634	10,197.9445	10,295.28	9,921.7967	9,867.8439	10,093.9521	10,009.4416	10,000.006
Thornburg Investment Income Builder Fund - Class R4
Account Value [Line Items]
Account Value	19,091.4807	19,078.2752	18,642.6955	17,969.9986	17,975.0457	17,296.1908	17,535.3518	16,686.8027	16,659.0068	16,600.0621	15,939.1455	15,049.9159		15,336.1357	15,584.1462	15,813.3359	15,382.2693	14,831.6126		15,264.1266	14,879.3632	14,914.0484	14,982.8993	14,124.3234	14,470.6032	13,356.4231	12,578.1658	13,676.5094	14,068.3015	13,789.4405	14,929.995	14,412.313	15,106.1389	15,060.6794	15,516.0883		15,431.0224	14,707.6069	14,872.8186	14,308.2374	14,694.2805	14,410.2646	14,403.441	14,560.6931	14,224.3187	13,988.3525	13,541.7074	13,091.8974	12,892.601	12,461.7436	10,931.9951	11,128.0174	11,520.6355	11,290.9951	11,037.8856	10,806.4143	10,432.7111	9,623.7673	11,914.834	12,805.6076	13,009.8618	12,678.6685	12,595.6753	12,366.1534	11,989.8066	12,086.6049	12,153.2481	11,591.3588	12,228.1575	11,861.3777		11,738.4323	11,580.0971	11,086.8085	11,618.4487	11,415.6334	11,909.2065	11,731.0049	11,917.4423	11,446.341	11,449.549	11,595.9225	11,363.0919	11,463.2128	12,038.5609	11,657.3259	11,561.73	11,283.6087	11,281.6141	11,057.0145	11,071.8576	10,845.491	10,836.0541	10,603.0659		10,545.3999	10,389.4121	10,210.9566	10,173.856	9,965.9033	9,854.4669	10,008.435	10,016.256	9,930.9251	9,680.8757	9,699.9433	9,591.1249	9,452.3528	8,950.6571	9,021.8168	9,309.728	9,604.2517	9,694.4166	9,257.162	9,689.1576	10,325.195	10,187.5272	10,446.1855	10,518.8177	10,199.837	10,296.0075	9,922.2234	9,866.8482	10,096.222	10,010.9472	9,999.9913
Thornburg Investment Income Builder Fund - Class R5
Account Value [Line Items]
Account Value	19,889.9942	19,869.2931	19,411.7437	18,701.6538	18,700.3172	17,992.1011	18,232.9334	17,342.831	17,308.2345	17,241.0684	16,554.0219	15,623.982		15,913.2156	16,170.4089	16,393.6472	15,945.2717	15,365.8822		15,812.355	15,410.7994	15,433.4646	15,505.9703	14,610.5504	14,961.5789	13,804.9468	13,000.2926	14,130.361	14,527.1976	14,235.7303	15,406.2443	14,869.9065	15,575.83	15,523.5719	15,991.3344		15,898.3757	15,152.7308	15,316.2302	14,726.5754	15,122.396	14,820.2413	14,807.781	14,963.0529	14,614.1968	14,368.1076	13,900.9587	13,437.3976	13,229.022	12,785.4679	11,210.0871	11,411.6891	11,807.8315	11,569.6926	11,301.7282	11,068.2429	10,678.4518	9,847.4647	12,181.9675	13,093.9577	13,296.2372	12,955.0973	12,865.7295	12,621.8612	12,235.9664	12,329.6632	12,392.7715	11,819.156	12,460.1008	12,084.5463		11,955.6598	11,786.0162	11,282.7389	11,816.5228	11,612.8303	12,107.7136	11,918.0132	12,107.4497	11,627.3401	11,626.5472	11,769.9233	11,530.8571	11,627.3074	12,204.6409	11,810.592	11,715.8471	11,426.3984	11,425.4374	11,195.348	11,201.0082	10,969.2181	10,955.9189	10,717.828		10,656.1518	10,495.6906	10,307.9827	10,272.0974	10,055.2761	9,939.9947	10,091.3657	10,095.6688	10,006.5131	9,752.4934	9,767.9535	9,655.5437	9,508.3141	9,003.0659	9,071.2438	9,361.0105	9,647.7069	9,739.2498	9,298.8397	9,722.0901	10,358.0862	10,216.9656	10,471.5365	10,540.2516	10,218.7232	10,310.7956	9,935.0788	9,876.909	10,102.4859	10,013.9552	9,999.9997
Thornburg Investment Income Builder Fund - Class R6
Account Value [Line Items]
Account Value	18,993.7208	18,964.21	18,530.7634	17,855.7557	17,844.9303	17,165.1029	17,392.8081	16,539.4841	16,510.9114	16,444.1891	15,779.1854	14,895.245		15,169.2008	15,406.0744	15,623.6287	15,193.9626	14,638.7405		15,062.6561	14,677.2244	14,696.4459	14,757.0809	13,907.1338	14,240.0623	13,135.1811	12,365.9506	13,441.6187	13,817.8047	13,537.9624	14,651.0225	14,131.6381	14,801.929	14,756.0752	15,193.2238		15,102.3635	14,390.7518	14,544.2438	13,980.8672	14,355.3864	14,071.7884	14,051.8675	14,197.5476	13,869.653	13,627.7088	13,187.5477	12,745.1167	12,545.0622	12,122.106	10,623.8586	10,813.7157	11,188.5453	10,960.7336	10,704.6086	10,481.6037	10,115.6169	9,323.8413	11,531.2498	12,389.3692	12,579.7115	12,255.0274	12,169.0164	11,941.9168	11,568.9393	11,656.1272	11,714.1952	11,169.0867	11,780.0583	11,422.6767		11,298.7679	11,136.6211	10,653.1376	11,162.3193	10,962.689	11,429.5047	11,253.6029	11,425.9234	10,969.9822	10,967.6872	11,101.5887	10,874.094	10,963.3852	11,508.1253	11,133.8625	11,037.9072	10,767.8542	10,765.3118	10,546.5907	10,550.3568	10,330.8459	10,319.7344	10,106.7258	9,999.9999
Thornburg Summit Fund - Class A
Account Value [Line Items]
Account Value	11,375.9344	11,183.6109	10,998.6188	10,914.5315	10,651.4187	10,351.1438	10,584.6909	10,323.8689	10,157.8903	10,041.7053	9,689.2263	9,135.7923		9,334.0373	9,635.7981	9,775.9252	9,578.0987	9,364.4385		9,445.8684	9,323.7235	9,121.1175	9,380.5626	8,926.5337	9,078.3794	8,530.6156	8,305.0658	8,855.565	9,055.736	8,695.4282	9,278.6549	9,167.2474	9,620.8351	9,596.2039	9,738.7218	$ 9,548.698
Thornburg Summit Fund - Class I
Account Value [Line Items]
Account Value	18,579.0767	18,253.6135	17,951.9009	17,801.0446	17,388.7212	16,885.6855	17,252.7656	16,831.0429	16,560.6648	16,371.4	15,788.0459	14,887.0246		15,196.3304	15,691.0338	15,905.612	15,597.1558	15,240.5291		15,372.9403	15,161.0824	14,835.7932	15,244.2386	14,506.4017	14,757.6578	13,854.9288	13,488.6039	14,385.6753	14,697.5599	14,125.7715	15,053.6547	14,885.818	15,608.8066	15,564.5161	15,795.6723		16,078.1965	15,661.6769	15,982.8946	15,567.7545	15,971.9699	15,709.7761	15,622.3782	15,524.0555	15,316.4855	14,781.1732	14,842.7424	13,884.7989	14,024.7232	13,179.7575	12,286.0291	12,491.1381	12,634.7144	12,070.6647	11,660.4467	11,301.5059	10,737.4561	9,958.0419	10,629.8618	10,976.0451	10,976.0451	10,715.0891	10,605.5633	10,545.1327	10,511.3481	10,390.7591	10,461.1027	10,200	10,390	10,190	$ 10,000
Thornburg Ultra Short Income Fund Class A
Account Value [Line Items]
Account Value	12,175.8823	12,110.631	12,044.2615	11,977.5452	11,922.4256	11,860.1934	11,816.142	11,764.567	11,723.7458	11,663.4071	11,586.6316	11,521.8623		11,473.2432	11,425.6828	11,378.0738	11,323.2218	11,278.4973		11,234.3443	11,191.9546	11,141.3192	11,112.4525	11,047.8221	10,993.8213	10,952.4118	10,951.0247	10,953.8253	10,923.1659	10,913.904	10,924.8974	10,920.8422	10,934.6596	10,959.8585	11,038.5303		11,045.6602	11,043.3656	11,050.223	11,057.406	11,054.0438	11,051.8206	11,048.8814	11,046.048	11,042.8586	11,035.8625	11,041.3254	11,037.5642	11,032.6042	11,017.1299	11,003.4241	10,998.2463	10,983.7174	10,960.0482	10,927.8657	10,834.2976	10,694.5981	10,528.128	10,803.1625	10,759.1035	10,706.2822	10,695.3149	10,684.0959	10,664.6365	10,661.5975	10,590.1194	10,586.2693	10,548.1753	10,483.5676	10,463.4052		10,400.7995	10,373.3742	10,320.5733	10,266.7447	10,255.4869	10,254.6039	10,255.0548	10,221.0277	10,211.5215	10,202.3187	10,177.9056	10,169.488	10,161.1418	10,165.0503	10,176.7	10,172.5222	10,182.8394	10,178.0037	10,172.7617	10,160.543	10,140.5077	10,136.2548	10,117.6549		10,105.4957	10,092.9888	10,066.5928	10,045.6261	10,035.9867	10,066.4978	10,073.9723	10,051.408	10,058.3101	10,049.0523	10,006.9803	9,997.479	9,972.886	9,924.5218	9,925.871	9,878.6027	9,902.2177	9,912.2789	9,915.4886	9,901.7892	9,904.2847	9,907.2175	9,909.9312	9,904.7728	9,899.5276	9,878.0515	9,887.8964	9,850.5616	9,876.8604	9,862.7621	9,848.8471
Thornburg Ultra Short Income Fund Class I
Account Value [Line Items]
Account Value	12,598.1479	12,527.3867	12,455.9682	12,384.8693	12,325.8819	12,259.483	12,211.9804	12,156.629	12,112.5398	12,048.1588	11,967.0083	11,898.1587		11,845.9437	11,794.9082	11,743.7632	11,685.1653	11,637.1121		11,589.5934	11,543.9823	11,489.8059	11,458.2519	11,389.77	11,332.1582	11,287.623	11,284.2896	11,285.3574	11,261.1303	11,240.4389	11,249.9474	11,253.1092	11,256.2819	11,289.5166	11,359.7176		11,365.1619	11,370.0312	11,365.9839	11,371.4736	11,366.1668	11,361.9821	11,357.0408	11,352.264	11,347.0656	11,338.0223	11,341.7536	11,336.1589	11,329.1373	11,311.3447	11,295.3769	11,288.1472	11,271.3907	11,245.21	11,210.275	11,121.3446	10,976.1167	10,803.5155	11,083.875	11,028.0968	10,972.0764	10,958.9717	10,945.6963	10,923.9187	10,919.025	10,852.6276	10,838.1566	10,797.3726	10,729.3187	10,706.992		10,641.1892	10,611.5063	10,564.2609	10,507.384	10,494.1506	10,482.9939	10,481.7402	10,445.2206	10,433.7061	10,431.0755	10,395.9267	10,393.7885	10,375.6558	10,386.2818	10,388.0238	10,381.9802	10,390.7164	10,384.0179	10,385.3396	10,362.7636	10,340.558	10,342.829	10,322.1005		10,299.7043	10,285.2094	10,264.9928	10,246.1335	10,234.5736	10,263.9952	10,261.6261	10,244.8874	10,241.9552	10,239.005	10,186.2645	10,183.0711	10,156.3688	10,105.3752	10,096.9771	10,055.325	10,077.6618	10,078.0968	10,079.645	10,072.1983	10,073.0241	10,074.2966	10,075.4092	10,068.4652	10,061.484	10,037.9516	10,046.418	10,006.7796	10,031.786	10,015.8282	9,999.9945
Thornburg Limited Term U.S. Government Fund - Class A
Account Value [Line Items]
Account Value	10,728.8091	10,611.0962	10,496.0142	10,290.7174	10,214.2755	10,081.2122	10,244.3234	10,183.7366	10,285.0629	10,258.8228	10,015.2908	9,760.637		9,840.2198	9,983.825	10,014.4289	10,003.5249	10,067.1139		10,124.0247	10,084.6258	9,916.7545	10,075.7362	9,878.7528	9,911.1501	9,711.1861	9,767.4965	10,084.1475	10,296.4164	10,128.8047	10,224.8523	10,149.4306	10,343.8973	10,563.4512	10,611.556		10,733.8147	10,754.9276	10,753.574	10,794.2337	10,841.3885	10,862.3263	10,792.7232	10,805.0446	10,793.3721	10,749.7044	10,829.7288	10,917.9644	10,933.7434	10,915.8685	10,889.14	10,927.1918	10,923.2005	10,943.2475	10,899.527	10,849.3286	10,813.7095	10,734.0679	10,742.9735	10,647.7428	10,536.6069	10,545.1897	10,553.9626	10,537.5221	10,545.11	10,449.4736	10,449.0176	10,407.7453	10,310.638	10,301.5508		10,221.9052	10,219.289	10,169.3722	10,066.528	10,012.2094	10,030.3156	10,064.748	10,018.5431	10,040.4357	10,047.1333	9,993.3961	10,031.5366	9,991.1484	10,019.0753	10,086.0853	10,083.7409	10,098.5828	10,108.1195	10,145.1823	10,103.1884	10,076.0889	10,109.3836	10,082.5605		10,046.219	10,054.1376	10,035.3884	10,026.2343	10,035.0414	10,138.7353	10,152.256	10,138.3976	10,154.459	10,161.8389	10,084.3426	10,098.8946	10,092.9062	10,071.1603	10,047.0775	9,936.6944	9,966.7951	9,989.6005	10,011.1674	9,975.7772	9,969.1242	9,954.0703	9,976.4707	9,973.6755	9,973.7459	9,948.8922	9,985.5717	9,902.5783	9,934.1958	9,899.6985	9,851.5153
Thornburg Limited Term U.S. Government Fund - Class C
Account Value [Line Items]
Account Value	10,561.8919	10,440.0358	10,329.4392	10,139.0435	10,057.4813	9,928.8269	10,090.3694	10,041.2922	10,134.0309	10,118.8298	9,882.1944	9,634.4727		9,706.294	9,857.5145	9,889.6036	9,881.0963	9,945.7909		9,995.7033	9,967.6355	9,796.6314	9,963.4359	9,763.9826	9,806.8585	9,612.509	9,670.4459	9,984.5812	10,196.2175	10,033.8046	10,130.3403	10,066.2589	10,259.9772	10,479.168	10,520.9589		10,652.7677	10,676.8569	10,678.7344	10,714.0931	10,772.4512	10,797.107	10,732.105	10,747.7881	10,731.2964	10,699.2158	10,781.793	10,872.157	10,891.0988	10,876.7758	10,853.3434	10,893.9991	10,892.3539	10,914.6074	10,873.6171	10,825.9811	10,792.8086	10,715.881	10,727.2276	10,635.0697	10,527.2256	10,538.3311	10,549.3379	10,527.4658	10,546.0186	10,446.0972	10,456.7057	10,418.168	10,316.1514	10,317.5155		10,233.1439	10,233.1382	10,194.2756	10,094.7686	10,043.4735	10,064.5095	10,102.0982	10,058.849	10,075.7197	10,092.757	10,041.7009	10,074.5042	10,044.5731	10,067.0826	10,144.3133	10,136.7155	10,161.7901	10,173.8883	10,213.8548	10,174.5006	10,150.0122	10,186.0031	10,154.0403		10,127.6493	10,138.0669	10,121.5683	10,114.8246	10,126.0918	10,232.1688	10,248.1573	10,236.4466	10,254.7085	10,264.4526	10,188.8449	10,205.768	10,202.0166	10,182.4856	10,160.4593	10,044.1718	10,084.1504	10,109.7822	10,133.7177	10,100.5464	10,095.9073	10,083.1734	10,108.0008	10,107.5084	10,109.6649	10,087.0218	10,133.6033	10,044.6334	10,078.7817	10,046.4099	10,000.0044
Thornburg Limited Term U.S. Government Fund - Class C2
Account Value [Line Items]
Account Value	9,702.6988	9,590.8577	9,489.2778	9,314.3978	9,239.45	9,121.3326	9,269.5916	9,224.4966	9,309.5717	9,295.5908	9,078.4	8,851.0022		8,909.5032	9,048.3937	9,077.8934	9,070.0682	9,129.4557		9,182.916	9,149.4734	9,000.1294	9,145.615	8,970.0796	9,001.7103	8,823.1111	8,876.3088	9,164.6489	9,366.4559	9,210.2192	9,306.3591	9,239.9971	9,417.8069	9,618.9824	9,665.0096		9,778.4808	9,800.5134	9,802.2305	9,842.1622	9,887.7246	9,909.781	9,849.6117	9,863.7089	9,856.1792	9,819.6047	9,896.1365	9,979.1274	9,997.104	9,984.1042	9,962.9134	9,999.9993
Thornburg Limited Term U.S. Government Fund - Class I
Account Value [Line Items]
Account Value	11,224.6251	11,098.4879	10,975.0416	10,757.3542	10,674.4716	10,523.158	10,690.4528	10,633.1333	10,736.0491	10,705.6609	10,448.7642	10,180.4685		10,251.7942	10,407.5044	10,436.4508	10,422.2672	10,486.0605		10,533.9186	10,499.1652	10,322.0076	10,485.2782	10,269.2016	10,309.2434	10,098.6542	10,154.573	10,481.1495	10,699.0765	10,522.3504	10,619.3423	10,538.1697	10,737.2128	10,962.3631	11,009.8111		11,133.9826	11,153.24	11,149.281	11,188.7893	11,235.5773	11,254.9503	11,180.4832	11,190.8434	11,176.256	11,128.6206	11,209.374	11,298.4236	11,312.2426	11,291.1494	11,260.9411	11,297.6438	11,290.93	11,309.0001	11,261.2042	11,206.4271	11,166.6108	11,081.4612	11,088.012	10,987.3235	10,870.1049	10,876.4096	10,882.9953	10,863.5418	10,868.8433	10,767.6923	10,764.6449	10,719.4181	10,616.6612	10,604.6559		10,520.1536	10,515.2233	10,461.4658	10,353.4337	10,295.3543	10,311.6783	10,344.8655	10,295.011	10,315.0181	10,319.4069	10,261.6368	10,298.3177	10,254.4164	10,280.8971	10,346.5343	10,341.0398	10,353.3153	10,360.1102	10,395.6166	10,349.6899	10,319.0636	10,350.3291	10,319.9922		10,279.954	10,285.1487	10,263.4058	10,251.07	10,257.2053	10,359.9588	10,378.6153	10,354.395	10,367.696	10,372.3632	10,290.2808	10,302.682	10,293.6069	10,268.4189	10,241.0443	10,117.9047	10,153.2394	10,173.5303	10,192.5775	10,153.9324	10,144.3688	10,126.3757	10,146.6492	10,141.4746	10,139.2379	10,111.7002	10,146.9075	10,059.9737	10,089.3704	10,051.6854	10,000.0066
Thornburg Limited Term U.S. Government Fund - Class R3
Account Value [Line Items]
Account Value	10,817.2642	10,698.5498	10,582.509	10,384.3998	10,298.4298	10,164.0939	10,328.1757	10,275.7293	10,369.0127	10,351.2788	10,106.1769	9,849.8338		9,921.592	10,066.2094	10,097.0574	10,094.8428	10,150.627		10,208.294	10,177.5307	10,000.1782	10,160.7265	9,962.723	9,996.0808	9,795	9,852.3351	10,171.9579	10,386.4992	10,218.2016	10,314.9718	10,238.9232	10,434.9924	10,656.945	10,706.0736		10,830.2702	10,852.634	10,852.3826	10,886.2283	10,943.0314	10,965.1801	10,895.9832	10,909.4324	10,890.5078	10,855.8652	10,937.6422	11,027.6824	11,044.9258	11,028.1279	11,002.422	11,042.1171	11,038.9334	11,052.0573	11,017.212	10,967.2119	10,931.8172	10,851.8615	10,861.9727	10,758.5632	10,655.4685	10,665.0919	10,674.8962	10,651.1253	10,667.8667	10,564.0725	10,572.6969	10,531.4324	10,433.6954	10,424.9687		10,337.1311	10,343.22	10,293.5882	10,190.5603	10,136.4822	10,155.7328	10,191.4375	10,145.6755	10,168.6871	10,176.2688	10,122.582	10,161.9268	10,123.8989	10,150.6492	10,218.8603	10,209.0518	10,232.4049	10,242.6387	10,278.6433	10,236.7651	10,209.8804	10,243.9159	10,209.5892		10,180.8211	10,189.3467	10,170.922	10,162.1003	10,163.8463	10,268.8994	10,290.8738	10,277.5347	10,294.3011	10,294.6195	10,224.2987	10,239.6635	10,234.2968	10,205.0281	10,181.353	10,070.1379	10,108.8292	10,132.6189	10,155.0666	10,119.9808	10,113.2347	10,090.9322	10,114.1552	10,119.5636	10,120.4577	10,095.894	10,133.7176	10,042.736	10,082.8256	10,048.315	9,999.9994
Thornburg Limited Term U.S. Government Fund - Class R4
Account Value [Line Items]
Account Value	10,804.7684	10,686.1262	10,570.1284	10,372.0142	10,286.031	10,151.6684	10,315.8727	10,263.3283	10,356.6894	10,338.9733	10,093.7817	9,837.351		9,909.1624	10,053.87	10,084.7553	10,082.5585	10,138.3928		10,196.1058	10,165.3994	9,988.0129	10,148.6601	9,950.5725	9,983.9849	9,791.2853	9,848.7553	10,160.0733	10,383.1896	10,214.9277	10,311.8002	10,235.7236	10,431.9476	10,654.0049	10,694.8024		10,827.3525	10,849.7416	10,849.462	10,883.3085	10,940.1523	10,962.3129	10,893.1609	10,898.3379	10,887.7107	10,853.0237	10,934.8404	11,025.004	11,042.1855	11,025.4033	10,999.696	11,031.1859	11,036.2656	11,049.4241	11,014.5738	10,964.4928	10,929.0939	10,849.116	10,851.0345	10,755.7269	10,652.5716	10,662.2054	10,672.0198	10,648.2569	10,665.0263	10,561.199	10,569.8214	10,528.5579	10,422.7078	10,422.0326		10,334.1584	10,340.3916	10,290.7342	10,187.6479	10,133.5608	10,152.8629	10,188.678	10,142.9232	10,165.943	10,173.5369	10,119.8661	10,159.2395	10,121.0443	10,147.8885	10,216.1223	10,206.2955	10,229.6678	10,239.9368	10,277.9474	10,236.0553	10,209.1552	10,243.4818	10,209.1334		10,180.2989	10,181.1365	10,170.5089	10,161.6938	10,163.4487	10,268.5821	10,290.586	10,277.8016	10,294.5896	10,294.9182	10,224.6732	10,240.0078	10,234.6437	10,205.3601	10,181.6792	10,070.3941	10,109.1259	10,132.9317	10,155.3964	10,120.2885	10,113.5329	10,091.209	10,114.4995	10,112.2294	10,120.6425	10,096.0077	10,133.8583	10,042.8058	10,075.4078	10,048.4777	10,000.0066
Thornburg Limited Term U.S. Government Fund - Class R5
Account Value [Line Items]
Account Value	11,184.9234	11,050.2525	10,927.4369	10,719.8688	10,628.2683	10,486.6859	10,653.3232	10,596.225	10,698.7887	10,668.6713	10,413.0742	10,146.0991		10,217.3033	10,372.4941	10,401.4639	10,387.5288	10,451.0601		10,498.7818	10,464.3654	10,287.8888	10,450.4781	10,235.3221	10,275.5863	10,066.2702	10,122.417	10,447.9869	10,665.4117	10,489.7491	10,586.2738	10,505.3834	10,703.7007	10,928.3358	10,976.0256		11,100.24	11,120.122	11,116.9019	11,157.0617	11,203.7684	11,223.3763	11,149.5306	11,160.3407	11,146.4255	11,099.5907	11,180.1382	11,269.4753	11,283.8827	11,263.6887	11,234.4707	11,271.9698	11,265.7418	11,284.5197	11,237.5616	11,183.5753	11,144.4577	11,060.034	11,067.18	10,967.3833	10,851.1011	10,857.9565	10,865.0829	10,846.2439	10,852.2603	10,752.1059	10,749.7252	10,704.9659	10,602.8457	10,591.0406		10,507.1215	10,502.5635	10,449.3384	10,341.9236	10,284.351	10,301.0843	10,334.5664	10,293.5035	10,305.9391	10,310.8864	10,253.6903	10,290.9601	10,244.4958	10,272.1669	10,347.1536	10,334.3849	10,355.254	10,354.806	10,389.389	10,344.2782	10,314.3135	10,346.1789	10,308.7282		10,276.9935	10,274.9419	10,261.6991	10,242.162	10,248.9648	10,359.8896	10,379.1965	10,356.365	10,370.409	10,375.6854	10,279.022	10,291.6945	10,291.3374	10,259.1299	10,232.7365	10,118.2358	10,146.6494	10,167.8722	10,195.3145	10,149.7517	10,147.8703	10,122.7479	10,143.3799	10,138.4267	10,144.2563	10,109.3044	10,152.3025	10,058.4344	10,088.2773	10,051.0864	10,000.0066
Thornburg Limited Term Income Fund - Class A
Account Value [Line Items]
Account Value	12,271.6168	12,146.8748	12,033.8513	11,836.864	11,750.6423	11,617.2793	11,724.2116	11,650.8244	11,701.3912	11,635.8807	11,360.2349	11,083.6456		11,148.2618	11,261.4539	11,257.2256	11,209.6995	11,231.9767		11,290.183	11,223.664	11,077.8348	11,207.5793	10,949.0778	10,948.729	10,732.6369	10,817.0002	11,085.4586	11,189.5246	11,054.4774	11,200.7227	11,164.6533	11,355.6537	11,556.427	11,690.1709		11,815.4719	11,819.093	11,832.4646	11,872.1837	11,911.8695	11,925.264	11,861.8592	11,857.3104	11,826.9305	11,762.346	11,859.7286	11,930.992	11,943.5116	11,895.7929	11,823.9119	11,833.2004	11,824.0513	11,814.5518	11,680.0199	11,495.9321	11,327.1334	11,048.8104	11,351.0225	11,250.1064	11,123.6651	11,110.9185	11,118.727	11,081.6295	11,091.8672	10,972.6135	10,957.8408	10,886.475	10,799.3682	10,768.5192		10,657.3062	10,627.1999	10,557.1282	10,462.8195	10,432.8593	10,451.1982	10,478.2645	10,425.894	10,420.7532	10,423.229	10,379.5824	10,399.2095	10,387.8575	10,416.7595	10,454.1622	10,445.1928	10,450.9843	10,442.0736	10,464.2739	10,424.447	10,385.2578	10,392.3718	10,346.0148		10,299.1212	10,291.1121	10,252.651	10,222.2819	10,206.7808	10,306.1981	10,307.2924	10,293.6338	10,285.9214	10,254.681	10,154.5341	10,137.1137	10,089.3693	10,004.06	9,972.9241	9,912.9021	9,957.5705	9,979.9844	9,972.1778	9,955.3946	9,983.6877	9,960.3157	10,010.3501	9,994.0096	9,984.9473	9,938.012	9,957.4468	9,866.5324	9,916.0752	9,891.7695	9,846.7152
Thornburg Limited Term Income Fund - Class C
Account Value [Line Items]
Account Value	12,189.2278	12,067.3697	11,957.2142	11,763.4277	11,680.0932	11,549.8445	11,658.7884	11,588.2455	11,640.988	11,578.2016	11,305.9694	11,032.6024		11,099.4773	11,214.5505	11,212.5758	11,167.3841	11,191.9122		11,252.3778	11,188.237	11,044.7565	11,176.2413	10,920.0906	10,921.8628	10,707.9437	10,794.3217	11,064.6902	11,170.8514	11,037.8724	11,186.0286	11,151.8904	11,344.8902	11,547.9765	11,683.8014		11,811.4687	11,817.6397	11,833.47	11,875.7852	11,917.2566	11,932.3855	11,870.568	11,868.1343	11,839.8768	11,777.2469	11,877.4944	11,951.324	11,966.4536	11,921.0889	11,851.3949	11,863.2004	11,856.0732	11,848.6554	11,715.578	11,532.7842	11,365.3588	11,079.3921	11,393.7009	11,294.2968	11,169.3375	11,158.9732	11,160.976	11,134.3414	11,146.9411	11,029.2533	11,016.7044	10,946.52	10,860.4925	10,831.0637		10,720.9354	10,692.2995	10,623.5426	10,530.3433	10,501.9368	10,522.3149	10,551.552	10,500.772	10,497.5537	10,501.9236	10,459.7666	10,481.3749	10,463.8848	10,494.794	10,542.3653	10,535.2381	10,542.9152	10,535.7602	10,559.8873	10,513.7829	10,483.8307	10,492.8096	10,447.779		10,402.0426	10,395.6964	10,358.5233	10,321.9582	10,315.9004	10,418.3176	10,421.1734	10,408.8975	10,402.884	10,373.17	10,273.5347	10,257.9453	10,211.5531	10,127.1039	10,097.3831	10,030.82	10,085.7421	10,110.3941	10,104.4888	10,089.1938	10,112.2779	10,098.1536	10,150.9901	10,136.5152	10,129.1816	10,083.4483	10,104.9066	10,014.4556	10,066.8408	10,043.8744	9,999.9933
Thornburg Limited Term Income Fund - Class C2
Account Value [Line Items]
Account Value	10,174.0877	10,074.4572	9,984.6054	9,824.8678	9,756.9976	9,649.9768	9,742.7569	9,685.4993	9,731.2049	9,680.4608	9,454.6243	9,227.7587		9,285.5405	9,383.6794	9,383.9277	9,348.0182	9,370.3176		9,422.8031	9,370.894	9,252.365	9,364.1164	9,151.2519	9,154.6486	8,976.5345	9,051.4258	9,280.1082	9,371.2355	9,261.7516	9,387.6396	9,360.6173	9,524.359	9,697.6487	9,813.7243		9,923.5676	9,930.8516	9,945.8975	9,983.2904	10,020.2428	10,035.2162	9,985.477	9,985.5453	9,964.0033	9,913.4636	9,999.8407	10,063.928	10,078.8574	10,042.9733	9,987.147	9,999.9958
Thornburg Limited Term Income Fund - Class I
Account Value [Line Items]
Account Value	12,854.8357	12,731.1361	12,609.9013	12,400.823	12,298.1018	12,155.6633	12,274.3167	12,185.0318	12,235.1197	12,163.7057	11,882.3629	11,581.354		11,646.2407	11,761.7471	11,754.5381	11,702.1646	11,722.7559		11,790.0168	11,717.9841	11,553.5676	11,686.093	11,422.7798	11,410.5014	11,191.8351	11,267.9417	11,544.9251	11,650.6456	11,507.4617	11,665.4072	11,624.5384	11,820.0222	12,026.6608	12,163.4017		12,282.1577	12,292.06	12,303.2525	12,332.8195	12,379.6319	12,390.1917	12,321.0816	12,313.6559	12,270.5045	12,209.7018	12,299.4336	12,370.8274	12,381.0426	12,337.5579	12,251.6707	12,267.1585	12,246.3722	12,242.4407	12,100.3559	11,906.6204	11,728.6397	11,428.9421	11,738.8732	11,640.6061	11,507.2785	11,491.6195	11,488.8497	11,456.5175	11,456.6225	11,331.3074	11,313.8886	11,236.7123	11,143.2122	11,107.9021		10,998.2591	10,964.3133	10,881.0638	10,781.0845	10,755.7498	10,763.7746	10,789.2254	10,732.8167	10,724.8152	10,724.7407	10,677.084	10,702.5968	10,680.0814	10,707.2554	10,750.217	10,729.5542	10,740.1325	10,719.5558	10,739.1327	10,695.0468	10,651.4673	10,655.4879	10,604.5914		10,553.2208	10,541.5989	10,499.3434	10,464.9765	10,453.6641	10,544.3371	10,549.8588	10,532.5802	10,513.6117	10,478.5515	10,373.1928	10,352.3312	10,300.6998	10,210.6111	10,183.6585	10,111.7487	10,154.1898	10,174.0309	10,170.7633	10,143.0202	10,168.6796	10,149.4793	10,190.0949	10,178.1341	10,158.5352	10,107.7538	10,124.7336	10,029.3536	10,076.6376	10,048.8798	10,000.0021
Thornburg Limited Term Income Fund - Class R3
Account Value [Line Items]
Account Value	12,241.953	12,119.8628	12,009.4724	11,815.2523	11,731.3271	11,591.2835	11,709.2239	11,628.9367	11,690.4388	11,627.1233	11,354.127	11,079.9758		11,146.6948	11,261.7984	11,259.6399	11,214.2249	11,238.5276		11,298.8679	11,234.4443	11,081.4492	11,221.7241	10,964.8748	10,966.5073	10,752.1028	10,829.8259	11,109.3809	11,215.8189	11,074.0307	11,230.636	11,196.0039	11,388.9651	11,592.2864	11,728.4153		11,856.4179	11,862.6613	11,878.6769	11,921.2362	11,962.7709	11,978.0588	11,916.2995	11,913.9119	11,885.7123	11,823.0672	11,923.2721	11,997.1372	12,012.1751	11,966.7149	11,896.8484	11,908.6117	11,901.6782	11,894.4964	11,761.3771	11,577.7983	11,409.6801	11,130.9627	11,437.2959	11,337.7475	11,212.587	11,202.0462	11,212.1346	11,177.1168	11,189.9988	11,072.3621	11,060.0384	10,989.1294	10,902.3568	10,872.2776		10,761.4579	10,732.3781	10,663.1727	10,569.3611	10,540.4768	10,560.325	10,588.9348	10,537.6625	10,533.9843	10,538.0205	10,495.3714	10,516.5988	10,498.6315	10,537.0851	10,575.9902	10,568.0455	10,574.928	10,566.9656	10,590.0885	10,550.9028	10,512.2573	10,520.4606	10,474.6882		10,428.2257	10,421.0996	10,383.1955	10,353.5792	10,339.0143	10,440.684	10,442.7398	10,429.7471	10,422.9031	10,392.4324	10,291.2536	10,274.852	10,227.7213	10,142.4601	10,111.9893	10,052.2573	10,098.5762	10,122.3608	10,115.5638	10,099.1946	10,128.5977	10,105.8471	10,157.6731	10,142.3039	10,134.1966	10,087.6608	10,108.3133	10,017.2732	10,068.5894	10,044.7438	10,000.0035
Thornburg Limited Term Income Fund - Class R4
Account Value [Line Items]
Account Value	12,251.1184	12,128.9701	12,018.5597	11,824.1536	11,730.9538	11,599.8923	11,718.05	11,637.8473	11,699.4493	11,627.0093	11,362.6571	11,079.0983		11,145.9616	11,270.2389	11,259.1375	11,222.6112	11,246.9692		11,307.4058	11,242.8868	11,089.6863	11,230.1573	10,972.9196	10,965.7813	10,759.8419	10,837.691	11,108.944	11,215.4928	11,082.1219	11,238.8754	11,204.2176	11,397.4915	11,601.1362	11,737.4682		11,857.025	11,871.9783	11,888.0679	11,930.6984	11,972.3049	11,987.6117	11,925.7261	11,923.3455	11,886.4978	11,831.9855	11,923.7633	11,997.7577	12,012.8065	11,975.8601	11,897.4672	11,917.7152	11,902.3874	11,903.5332	11,770.2386	11,586.384	11,417.853	11,130.4184	11,437.403	11,346.0593	11,220.8336	11,210.3055	11,212.2155	11,185.4057	11,190.106	11,072.3798	11,060.0579	10,989.055	10,902.1514	10,872.0528		10,769.2035	10,740.048	10,670.6549	10,576.7274	10,547.8209	10,567.8353	10,588.5151	10,537.1721	10,533.5076	10,537.5695	10,494.8873	10,524.104	10,506.1105	10,536.7816	10,583.6702	10,567.8567	10,582.652	10,566.8314	10,590.1172	10,550.8928	10,512.2081	10,520.4421	10,474.6181		10,428.0385	10,420.9996	10,383.0559	10,353.411	10,346.5974	10,440.7048	10,450.5119	10,437.5558	10,423.0055	10,392.5206	10,292.0432	10,275.6393	10,228.4583	10,143.087	10,112.5886	10,052.7795	10,099.203	10,123.0423	10,123.866	10,099.0956	10,128.5638	10,113.3621	10,157.7359	10,142.3626	10,134.2628	10,087.6798	10,108.3864	10,017.2318	10,068.6453	10,044.7786	10,000.0032
Thornburg Limited Term Income Fund - Class R5
Account Value [Line Items]
Account Value	12,778.6631	12,646.0242	12,525.5311	12,317.7216	12,225.21	12,083.6342	12,192.0712	12,112.8175	12,162.6022	12,091.6189	11,802.5346	11,512.6965		11,577.2036	11,692.0444	11,684.8827	11,632.8208	11,653.2954		11,710.9478	11,639.3651	11,475.9183	11,616.8198	11,345.9714	11,342.8598	11,116.424	11,192.0915	11,476.4691	11,581.5745	11,430.2556	11,587.2632	11,546.6352	11,740.9448	11,945.6207	12,081.3498		12,208.1109	12,209.4052	12,220.875	12,259.5344	12,297.2198	12,307.716	12,239.0176	12,231.5508	12,197.3903	12,128.0706	12,225.7272	12,296.7878	12,306.9992	12,255.2195	12,178.6373	12,185.5268	12,173.4573	12,160.962	12,019.6685	11,827.1145	11,650.3059	11,352.3962	11,668.8737	11,562.699	11,430.1579	11,414.5875	11,411.8303	11,379.7021	11,388.1541	11,263.5897	11,246.2834	11,169.5684	11,076.6276	11,041.5413		10,924.3272	10,890.6226	10,817.418	10,719.3024	10,687.2065	10,704.4624	10,730.6608	10,675.7605	10,669.1244	10,670.3919	10,616.2617	10,642.9963	10,622.313	10,650.449	10,694.7537	10,675.6997	10,687.782	10,676.8301	10,697.2462	10,646.6838	10,612.4397	10,617.7595	10,568.666		10,518.9814	10,508.7532	10,467.6535	10,426.9259	10,417.0993	10,516.804	10,516.0219	10,500.1882	10,490.4654	10,456.9515	10,353.2016	10,333.8932	10,283.772	10,195.2295	10,161.6603	10,098.1074	10,141.0756	10,161.2001	10,150.4527	10,130.7524	10,149.9157	10,131.9197	10,181.2382	10,163.0672	10,152.2717	10,102.8921	10,121.121	10,027.1995	10,075.4792	10,048.5551	10,000.0021
Thornburg Limited Term Income Fund - Class R6
Account Value [Line Items]
Account Value	12,292.8648	12,164.7924	12,048.361	11,848.1458	11,749.4088	11,612.7772	11,725.2055	11,639.2837	11,695.4064	11,617.5164	11,348.5186	11,060.7996		11,121.9413	11,240.2929	11,223.7776	11,181.9974	11,200.9172		11,255.4705	11,186.1091	11,028.6792	11,163.1095	10,902.7526	10,890.3375	10,681.3127	10,753.1436	11,016.351	11,124.9852	10,979.28	11,129.0487	11,089.4145	11,274.916	11,470.2887	11,599.663		11,720.3488	11,720.8312	11,731.104	11,767.3479	11,802.7123	11,812.023	11,745.4951	11,737.5909	11,704.1434	11,637.0619	11,729.8296	11,797.1949	11,806.2208	11,755.9166	11,681.9165	11,687.7844	11,675.5142	11,662.8178	11,526.915	11,341.9589	11,172.0536	10,886.3243	11,188.43	11,086.1888	10,958.6901	10,943.0911	10,939.7789	10,908.3445	10,915.7371	10,795.9025	10,778.6374	10,704.5945	10,615.0451	10,580.8245		10,468.0754	10,435.2199	10,363.2128	10,267.4543	10,234.8511	10,249.4346	10,264.7734	10,218.1464	10,202.1384	10,209.179	10,155.5776	10,179.1333	10,157.0885	10,182.3553	10,222.8192	10,202.8637	10,212.4385	10,192.4369	10,217.8346	10,167.8831	10,113.7141	10,102.7155	10,045.1968	10,000.0046
Thornburg Core Plus Bond Fund - Class A
Account Value [Line Items]
Account Value	10,745.2473	10,611.6763	10,460.2072	10,227.6145	10,121.9347	9,938.1227	10,210.9892	10,125.3594	10,275.269	10,268.5481	9,886.1485	9,415.3767	$ 9,551.1
Thornburg Core Plus Bond Fund - Class C
Account Value [Line Items]
Account Value	11,178.2135	11,036.0102	10,885.219	10,649.9725	10,546.6426	10,371.7673	10,662.1559	10,569.3459	10,732.2032	10,732.0267	10,336.9707	9,852.1409	10,000
Thornburg Core Plus Bond Fund - Class I
Account Value [Line Items]
Account Value	11,280.3632	11,127.3458	10,976.7037	10,730.397	10,617.3382	10,422.4091	10,705.3602	10,613.3489	10,768.3492	10,758.9632	10,345.5479	9,859.8496	10,000
Thornburg Core Plus Bond Fund - Class R3
Account Value [Line Items]
Account Value	11,223.2152	11,075.4076	10,929.6346	10,688.7889	10,570.2126	10,390.4276	10,678.3734	10,591.0611	10,750.0112	10,745.2186	10,335.5752	9,855.9412	10,000
Thornburg Core Plus Bond Fund - Class R4
Account Value [Line Items]
Account Value	11,250.9951	11,100.4732	10,952.1266	10,708.559	10,587.5484	10,405.3334	10,691.4693	10,601.8251	10,758.7986	10,751.6922	10,339.7099	9,857.9052	10,000
Thornburg Core Plus Bond Fund - Class R5
Account Value [Line Items]
Account Value	11,278.8288	11,125.5706	10,974.6503	10,728.3497	10,604.9047	10,420.2392	10,704.5862	10,612.589	10,767.586	10,758.1659	10,343.8345	9,859.8594	10,000
Thornburg Core Plus Bond Fund - Class R6
Account Value [Line Items]
Account Value	11,281.7902	11,128.345	10,977.3144	10,730.8727	10,617.6672	10,422.6018	10,705.4857	10,613.3802	10,767.9464	10,758.4317	10,344.0089	9,859.9379	10,000
Thornburg Strategic Income Fund - Class A
Account Value [Line Items]
Account Value	13,254.4009	13,109.6228	12,955.003	12,733.7012	12,629.2077	12,460.7812	12,615.2879	12,514.9618	12,568.6627	12,522.5663	12,225.1399	11,875.4192		11,961.1631	12,112.296	12,112.831	12,038.1948	12,029.093		12,052.8286	11,981.5991	11,814.9749	11,944.344	11,673.3007	11,654.9455	11,441.5881	11,458.2729	11,715.5595	11,797.0087	11,610.1355	11,877.961	11,867.4244	12,072.5714	12,236.7903	12,369.466		12,501.2979	12,459.6697	12,488.4204	12,505.557	12,512.5861	12,469.4828	12,406.004	12,362.1428	12,315.4246	12,235.1821	12,262.3281	12,239.206	12,204.8969	12,092.5612	11,925.6077	11,875.6397	11,835.517	11,735.7135	11,520.7826	11,279.557	10,964.3092	10,668.951	11,421.336	11,392.848	11,315.2041	11,247.2085	11,235.9126	11,195.7646	11,183.8279	11,097.1912	11,064.5924	10,948.0525	10,905.924	10,845.9198		10,749.2909	10,689.6439	10,520.407	10,506.7238	10,506.7231	10,570.2314	10,561.1866	10,507.0322	10,471.024	10,462.9466	10,445.9258	10,449.7261	10,462.4327	10,493.5834	10,489.146	10,466.9904	10,451.5159	10,425.0509	10,414.0614	10,368.0076	10,304.5903	10,276.2359	10,195.7671		10,106.841	10,076.5627	9,981.74	9,894.623	9,833.4318	9,918.0817	9,890.2736	9,871.0609	9,790.1119	9,649.8268	9,575.6135	9,543.8839	9,359.4312	9,114.7595	9,122.0792	9,187.7377	9,316.6752	9,364.4538	9,269.4479	9,376.4644	9,491.3107	9,524.0148	9,599.3924	9,583.1458	9,469.8279	9,485.957	9,389.4936	9,407.5203	9,545.3134	9,580.3982	9,552.9445
Thornburg Strategic Income Fund - Class C
Account Value [Line Items]
Account Value	12,944.7111	12,810.9635	12,667.606	12,447.6871	12,352.8329	12,206.2297	12,365.4618	12,274.6024	12,334.6069	12,296.9629	12,011.7535	11,674.2726		11,765.82	11,921.7259	11,929.3396	11,871.0704	11,858.3058		11,888.7478	11,835.5324	11,677.5273	11,801.4031	11,550.3128	11,539.0716	11,334.2023	11,347.4996	11,620.2299	11,708.4508	11,519.6538	11,793.066	11,789.9136	12,001.4382	12,172.9733	12,302.0707		12,441.4185	12,418.2048	12,455.0211	12,480.4718	12,495.2326	12,459.9427	12,404.7565	12,369.0932	12,320.5716	12,258.1161	12,293.732	12,278.0394	12,241.9717	12,146.7282	11,976.7976	11,944.1579	11,910.5529	11,816.8592	11,606.8571	11,370.4248	11,059.5628	10,768.1612	11,536.3806	11,514.3374	11,433.3064	11,381.2864	11,367.3203	11,343.3775	11,338.3278	11,258.0813	11,232.2028	11,120.5785	11,084.3645	11,029.6486		10,938.1527	10,883.4819	10,717.2573	10,719.286	10,716.4893	10,788.1392	10,785.1972	10,736.6592	10,706.475	10,713.875	10,693.8659	10,704.1791	10,723.7487	10,761.3345	10,762.9967	10,746.4671	10,745.671	10,724.6846	10,710.2438	10,668.9228	10,609.6015	10,586.2109	10,509.1623		10,423.0968	10,397.7085	10,313.6716	10,219.5075	10,161.0185	10,253.3393	10,237.1115	10,213.3154	10,134.3529	9,993.6265	9,921.2177	9,901.7206	9,714.5628	9,456.052	9,467.8195	9,540.586	9,679.2751	9,742.182	9,639.1792	9,754.1183	9,878.484	9,917.2615	10,000.5629	9,997.1183	9,883.5677	9,905.2147	9,800.3932	9,832.6608	9,973.7067	10,015.3651	10,000.0038
Thornburg Strategic Income Fund - Class I
Account Value [Line Items]
Account Value	14,402.6387	14,228.626	14,068.3956	13,811.3509	13,693.7149	13,506.5462	13,682.4023	13,557.2917	13,611.7432	13,557.5516	13,242.5341	12,847.1769		12,947.44	13,095.1942	13,102.918	13,018.9943	12,993.1523		13,014.2354	12,944.2275	12,759.6991	12,884.1626	12,598.2467	12,574.1969	12,339.7966	12,342.6259	12,616.5291	12,700.3435	12,494.6304	12,779.5572	12,764.0605	12,981.2937	13,143.5761	13,282.9747		13,420.805	13,372.4043	13,410.8478	13,425.5158	13,418.2877	13,378.6253	13,306.7792	13,256.3971	13,191.7513	13,101.8654	13,127.2197	13,109.6882	13,058.3108	12,944.6401	12,751.3792	12,696.2228	12,649.4724	12,548.7052	12,306.0207	12,053.748	11,711.7838	11,391.2525	12,182.6354	12,158.7908	12,062.579	11,996.2577	11,970.4477	11,933.565	11,927.2712	11,821.1216	11,782.1943	11,663.4933	11,614.4935	11,536.7812		11,439.008	11,362.0825	11,178.467	11,170.0765	11,166.6782	11,221.097	11,207.8301	11,156.4666	11,105.1208	11,102.6958	11,071.5507	11,081.6336	11,081.9826	11,111.4478	11,102.7207	11,075.2379	11,064.3408	11,032.3392	11,016.7128	10,954.6431	10,883.4845	10,849.6327	10,760.5281		10,662.6863	10,626.7805	10,532.5356	10,428.4781	10,360.932	10,447.5544	10,422.4895	10,390.6054	10,302.3108	10,151.493	10,070.6062	10,043.2219	9,846.2088	9,576.9659	9,582.3398	9,648.9233	9,781.9376	9,838.2415	9,726.818	9,836.2718	9,954.5079	9,986.1583	10,062.747	10,051.5088	9,929.7987	9,943.9326	9,831.7379	9,856.145	9,989.4726	10,031.623	9,999.9949
Thornburg Strategic Income Fund - Class R3
Account Value [Line Items]
Account Value	13,620.8272	13,475.067	13,319.208	13,083.1249	12,978.6326	12,819.7818	12,981.9354	12,881.6942	12,939.912	12,895.4634	12,591.8405	12,233.7824		12,324.6711	12,482.9709	12,486.0081	12,410.6864	12,403.6585		12,430.5948	12,359.3926	12,189.9561	12,314.9288	12,048.3477	12,031.956	11,813.9747	11,833.9146	12,102.5633	12,189.5382	11,988.2318	12,278.6148	12,270.4335	12,485.592	12,648.3644	12,788.6231		12,928.1945	12,888.5313	12,932.3766	12,953.598	12,953.5516	12,922.8246	12,850.1026	12,818.7312	12,763.131	12,682.9832	12,714.402	12,703.7459	12,660.9245	12,557.3931	12,376.6622	12,330.0167	12,291.1204	12,199.9821	11,970.8716	11,731.5643	11,395.4641	11,099.7072	11,876.1094	11,858.9373	11,771.6173	11,703.4935	11,694.3099	11,664.6897	11,664.6278	11,567.1488	11,535.2423	11,425.2174	11,383.0729	11,322.1943		11,223.1602	11,152.9591	10,977.8792	10,974.793	10,976.4617	11,035.0576	11,026.9436	10,981.6183	10,936.2908	10,938.8607	10,922.7149	10,928.2562	10,943.1164	10,975.9477	10,963.2384	10,941.2668	10,935.5212	10,909.0326	10,884.7475	10,828.565	10,763.3518	10,734.7985	10,651.7151		10,558.7491	10,528.1389	10,438.6507	10,347.5378	10,274.5984	10,372.2216	10,341.4427	10,321.6344	10,237.1522	10,090.4454	10,012.895	9,979.7428	9,786.7365	9,530.7014	9,538.3985	9,607.1498	9,742.1147	9,792.2523	9,692.861	9,803.8586	9,924.075	9,958.3343	10,028.8222	10,020.6865	9,902.4003	9,927.8861	9,818.7879	9,846.4671	9,982.9027	10,020.0235	9,999.9992
Thornburg Strategic Income Fund - Class R4
Account Value [Line Items]
Account Value	13,617.9122	13,460.5958	13,316.3585	13,080.3264	12,975.8578	12,817.0539	12,979.1635	12,867.5699	12,937.119	12,892.6818	12,589.1262	12,231.1579		12,322.0287	12,469.177	12,483.3242	12,408.0096	12,389.9543		12,427.8852	12,356.7127	12,187.316	12,312.2643	12,045.766	12,029.3808	11,811.4608	11,820.6357	12,099.9847	12,186.9459	11,985.6872	12,265.3595	12,257.1994	12,482.9342	12,645.451	12,785.7191		12,925.2766	12,885.628	12,918.9928	12,940.1532	12,950.4192	12,908.8139	12,846.5839	12,804.7454	12,749.1546	12,679.3212	12,710.7316	12,689.986	12,647.3357	12,543.9292	12,363.2795	12,326.6684	12,277.7533	12,186.6201	11,957.5882	11,718.3984	11,392.3524	11,086.6565	11,872.767	11,845.7162	11,758.4482	11,700.2118	11,681.2185	11,651.6113	11,651.5657	11,563.8608	11,532.0018	11,412.3462	11,370.232	11,309.3651		11,210.3887	11,149.8047	10,974.8229	10,962.1931	10,963.854	11,022.4372	11,014.4343	10,969.1369	10,923.8258	10,926.3865	10,910.2367	10,915.7776	10,929.3219	10,961.9261	10,958.4712	10,936.4878	10,930.7105	10,904.2573	10,884.6529	10,837.6355	10,772.3983	10,743.8325	10,660.7254		10,568.119	10,537.4941	10,447.9855	10,347.848	10,283.885	10,372.5221	10,350.6853	10,321.9347	10,237.4392	10,090.7176	10,013.1432	9,988.8348	9,795.8055	9,530.9508	9,538.6381	9,607.37	9,742.3273	9,800.9746	9,692.9283	9,803.9155	9,924.1213	9,958.3576	10,037.3501	10,029.1976	9,910.8945	9,927.9331	9,827.2366	9,846.5141	9,982.9265	10,028.2568	9,999.9992
Thornburg Strategic Income Fund - Class R5
Account Value [Line Items]
Account Value	14,387.9947	14,214.1413	14,054.08	13,797.3028	13,679.7965	13,504.8874	13,668.5213	13,555.5139	13,609.8654	13,555.6832	13,229.131	12,845.9398		12,934.339	13,093.6135	13,089.6447	13,005.8013	12,979.9581		13,012.5516	12,931.1213	12,746.7772	12,871.1117	12,585.483	12,561.4212	12,327.2276	12,330.0548	12,614.85	12,698.5715	12,481.9296	12,766.5735	12,762.144	12,979.1323	13,141.4796	13,280.7078		13,418.3682	13,369.9846	13,408.3602	13,422.9791	13,415.7114	13,375.9053	13,293.3593	13,253.7061	13,189.0717	13,099.24	13,124.5164	13,106.9502	13,055.5687	12,941.9706	12,748.8694	12,693.748	12,646.9959	12,546.2966	12,303.8275	12,051.7792	11,699.8966	11,389.8625	12,180.4087	12,146.4019	12,060.3818	11,983.7362	11,967.9966	11,920.6881	11,914.4095	11,818.324	11,779.3994	11,650.9111	11,601.9456	11,534.1207		11,426.6368	11,359.5444	11,176.1014	11,158.0015	11,154.6063	11,208.9541	11,195.7012	11,144.405	11,093.1032	11,090.6704	11,069.058	11,069.6252	11,079.4165	11,099.4761	11,090.7758	11,063.293	11,052.293	11,020.315	10,993.3857	10,940.6838	10,869.6313	10,835.8382	10,746.8625		10,649.149	10,613.3013	10,510.0726	10,415.9185	10,349.1809	10,436.349	10,412.0919	10,380.9548	10,293.6241	10,143.6596	10,063.4561	10,036.8262	9,840.5247	9,571.9779	9,577.8179	9,644.9119	9,778.5196	9,835.5996	9,724.8821	9,834.3861	9,953.0423	9,985.2984	10,062.5472	10,052.2156	9,922.896	9,937.8906	9,834.9533	9,860.6103	9,995.3253	10,030.4568	9,999.9968
Thornburg Strategic Income Fund - Class R6
Account Value [Line Items]
Account Value	13,624.0426	13,470.5	13,306.8376	13,063.4187	12,951.5741	12,785.4944	12,939.1169	12,831.5309	12,881.9884	12,829.9475	12,520.8267	12,158.3004		12,240.8734	12,390.3457	12,385.7325	12,305.9838	12,280.7678		12,310.6749	12,232.9908	12,058.2349	12,174.7513	11,904.4836	11,880.9638	11,659.3191	11,661.1813	11,928.9948	12,007.133	11,802.0337	12,069.6538	12,054.2339	12,268.4459	12,420.46	12,550.9508		12,679.8736	12,633.4374	12,668.7974	12,681.6894	12,674.0253	12,635.8411	12,557.2074	12,519.0219	12,457.3025	12,371.8348	12,394.7874	12,377.4414	12,328.1892	12,220.3685	12,037.6707	11,984.8694	11,940.0588	11,844.4166	11,615.3048	11,377.2586	11,045.1938	10,752.5829	11,496.12	11,463.384	11,381.646	11,308.9976	11,293.4391	11,248.2603	11,242.2971	11,151.1078	11,113.7495	10,992.0776	10,945.2937	10,880.7989		10,778.8697	10,715.1319	10,542.1126	10,524.6186	10,520.9872	10,571.6644	10,567.7954	10,510.0592	10,461.3594	10,458.6469	10,437.8697	10,438.1316	10,450.779	10,470.1518	10,461.5629	10,436.3077	10,436.8356	10,399.086	10,363.0857	10,273.6056	10,210.3613	10,174.3639	10,059.5867	9,999.9973
Thornburg Short Duration Municipal Fund Class A
Account Value [Line Items]
Account Value	10,642.7436	10,597.3762	10,534.2497	10,462.6804	10,409.3007	10,391.7083	10,391.1109	10,382.3162	10,373.2185	10,373.2429	10,313.1006	10,140.9197		10,124.1722	10,185.2968	10,178.3088	10,155.4636	10,090.4813		10,120.233	10,141.6808	10,036.768	10,110.6799	10,026.6127	10,018.107	9,903.0725	9,897.2518	10,002.6373	10,084.0348	10,024.4534	10,024.887	9,976.0983	10,028.9156	10,142.548	10,162.9875		10,286.076	10,283.7124	10,289.4792	10,296.3268	10,319.6112	10,326.7853	10,308.7179	10,314.9144	10,321.5527	10,310.9468	10,301.0115	10,322.3945	10,312.0773	10,301.0218	10,297.0913	10,301.9834	10,295.65	10,288.2774	10,263.8627	10,238.2648	10,129.9655	10,170.5294	10,274.2018	10,256.3376	10,222.667	10,213.0184	10,203.6914	10,185.8389	10,200.1542	10,182.1291	10,163.761	10,135.5956	10,108.3559	10,104.646		10,076.8114	10,055.7066	10,030.6801	10,004.1727	9,985.5003	9,984.2708	9,991.2292	9,990.6135	9,984.0207	9,968.3084	9,953.8487	9,953.4252	9,962.4584	9,953.8291	9,946.7631	9,947.6854	9,972.5424	9,982.254	9,991.0396	9,952.0866	9,929.2453	9,946.2717	9,924.3489		9,901.8531	9,904.7257	9,882.0198	9,858.9789	9,849.3535	9,887.1288	9,885.4753	9,906.9598	9,921.4412	9,911.5023	9,884.2237	9,889.718	9,886.5539	9,901.0783	9,882.5245	9,857.5144	9,864.9168	9,879.4469	9,870.3794	9,852.1139	9,850.6343	9,833.5604	9,823.5426	9,838.7027	9,845.1351	9,852.9841	9,867.5813	9,843.6308	9,859.2767	9,857.6712	9,848.3689
Thornburg Short Duration Municipal Fund Class I
Account Value [Line Items]
Account Value	11,011.9202	10,972.3244	10,905.1176	10,829.214	10,772.2188	10,743.1389	10,749.7847	10,738.8778	10,727.7065	10,725.9313	10,652.9829	10,482.1985		10,454.2218	10,515.6663	10,506.683	10,481.3168	10,421.3309		10,450.2875	10,461.9539	10,351.9243	10,426.6408	10,338.0774	10,336.2178	10,207.178	10,199.401	10,306.3401	10,397.2038	10,325.3856	10,332.7793	10,272.1606	10,333.5096	10,440.2165	10,459.6798		10,584.6543	10,589.0374	10,584.6796	10,598.5228	10,612.1203	10,617.6355	10,597.2465	10,610.4544	10,606.8947	10,594.2499	10,582.2534	10,602.6115	10,590.2087	10,577.034	10,571.2666	10,574.4991	10,566.2303	10,556.8861	10,530.0428	10,510.5729	10,397.6575	10,437.5859	10,542.3446	10,522.3548	10,486.0366	10,474.3965	10,463.1274	10,443.0505	10,456.0077	10,435.7705	10,406.7616	10,384.5963	10,346.4838	10,340.9491		10,310.696	10,287.4986	10,268.4671	10,239.634	10,210.4975	10,215.9038	10,221.3472	10,218.9876	10,210.5129	10,192.7852	10,167.9772	10,174.1659	10,173.4038	10,171.2483	10,153.9944	10,153.3372	10,185.3074	10,185.2601	10,192.5592	10,159.2773	10,134.2497	10,141.7632	10,117.6771		10,101.2415	10,102.4495	10,069.5677	10,045.76	10,042.2205	10,079.0775	10,075.684	10,095.491	10,108.5426	10,096.7195	10,067.2754	10,071.1752	10,058.1611	10,071.2458	10,058.9017	10,023.6013	10,029.4316	10,050.6947	10,039.7719	10,027.6814	10,016.3495	9,997.2957	9,985.4721	9,999.183	10,004.0688	10,010.4671	10,023.7622	9,999.3464	10,014.4174	10,011.1446	10,000.0028
Thornburg Limited Term Municipal Fund - Class A
Account Value [Line Items]
Account Value	11,078.8105	11,017.734	10,908.834	10,808.3665	10,716.323	10,753.3017	10,822.1193	10,827.4642	10,808.2629	10,837.5494	10,685.592	10,337.1177		10,359.6239	10,500.24	10,547.5477	10,517.406	10,456.128		10,528.0383	10,553.4254	10,416.7075	10,557.1633	10,391.5568	10,372.0782	10,145.4517	10,165.8718	10,378.3901	10,515.0893	10,369.9446	10,423.2571	10,317.6006	10,478.4832	10,710.2519	10,735.2341		10,951.2521	10,947.5534	10,920.3563	10,954.4261	11,003.0631	11,022.4322	10,974.3514	10,970.6587	10,974.8128	10,940.657	10,914.4672	10,998.6087	10,972.1478	10,945.2054	10,894.9288	10,912.2754	10,906.4123	10,915.725	10,835.3948	10,790.9784	10,576.5391	10,620.3544	10,804.0941	10,751.6128	10,656.2434	10,633.9274	10,625.6249	10,603.518	10,653.5682	10,608.7979	10,541.9798	10,504.083	10,430.5347	10,421.5807		10,362.4819	10,330.714	10,265.3582	10,192.5843	10,133.8716	10,155.2994	10,190.9223	10,190.7046	10,162.3131	10,147.5338	10,083.5868	10,111.5286	10,119.0735	10,132.3434	10,175.8839	10,140.8278	10,219.3558	10,220.4227	10,270.3154	10,214.5874	10,172.9062	10,201.0297	10,116.9627		10,053.3903	10,046.8977	9,996.7343	9,948.3689	9,893.4221	10,145.6049	10,195.7055	10,224.0343	10,225.4506	10,213.0206	10,130.2964	10,145.1836	10,103.94	10,119.0041	10,105.6579	10,017.4784	9,997.9041	9,991.3355	9,964.5823	9,917.0434	9,911.2559	9,871.1551	9,871.307	9,899.707	9,914.2534	9,915.7851	9,976.9339	9,869.6579	9,877.4834	9,877.8928	9,851.3561
Thornburg Limited Term Municipal Fund - Class C
Account Value [Line Items]
Account Value	10,977.9757	10,911.8314	10,814.4058	10,717.2789	10,620.5988	10,667.4873	10,737.8953	10,737.8854	10,729.0967	10,752.7893	10,604.815	10,261.8129		10,286.5609	10,428.0915	10,484.8546	10,449.297	10,390.394		10,463.7184	10,490.8202	10,357.1828	10,506.2149	10,343.8234	10,318.9005	10,095.813	10,118.1781	10,339.1497	10,477.2835	10,335.1556	10,382.6957	10,279.7205	10,449.454	10,674.7911	10,709.2356		10,926.5902	10,918.0701	10,901.0942	10,930.178	10,988.9914	11,002.8678	10,956.9788	10,963.2456	10,962.3907	10,930.6988	10,914.8374	10,993.8421	10,970.1688	10,953.4673	10,905.9628	10,918.4748	10,914.7441	10,933.6782	10,848.1003	10,813.4174	10,601.2773	10,647.3625	10,826.0277	10,782.9543	10,689.69	10,669.6535	10,656.1923	10,636.3274	10,696.0046	10,646.131	10,588.7264	10,552.752	10,473.7493	10,474.0487		10,416.9216	10,379.6893	10,316.2042	10,252.5039	10,188.3262	10,211.9229	10,256.9724	10,258.8626	10,232.449	10,219.598	10,157.3505	10,187.4125	10,189.8631	10,212.1992	10,258.0473	10,217.6789	10,298.691	10,308.9678	10,361.2587	10,307.2442	10,260.212	10,297.6164	10,207.8288		10,152.7487	10,148.1191	10,099.3607	10,052.5628	9,992.0646	10,255.415	10,307.9884	10,338.6362	10,342.1736	10,331.664	10,250.196	10,267.2654	10,227.6211	10,244.849	10,233.2225	10,146.0818	10,121.3292	10,123.542	10,098.4857	10,045.207	10,048.204	10,009.5502	10,011.5757	10,042.3809	10,058.9588	10,062.433	10,119.2002	10,019.3468	10,022.4328	10,024.8463	10,000.0072
Thornburg Limited Term Municipal Fund - Class C2
Account Value [Line Items]
Account Value	9,952.1313	9,893.9496	9,807.4081	9,721.1503	9,634.9618	9,679.1155	9,744.6103	9,746.0937	9,739.539	9,762.6306	9,629.9188	9,319.9705		9,344.0803	9,481.768	9,528.4228	9,498.2895	9,453.8733		9,515.759	9,549.6232	9,422.9918	9,560.3943	9,414.5921	9,394.1775	9,193.0243	9,215.5763	9,418.8757	9,546.9825	9,419.6465	9,464.8231	9,372.8753	9,529.6086	9,737.4776	9,771.1205		9,972.018	9,973.3175	9,953.1031	9,988.791	10,037.5072	10,059.78	10,020.5753	10,021.7468	10,030.2886	10,003.7446	9,984.5352	10,059.0069	10,046.8179	10,026.9685	9,985.7504	9,999.9965
Thornburg Limited Term Municipal Fund - Class I
Account Value [Line Items]
Account Value	11,545.8311	11,479.6227	11,371.9313	11,256.3288	11,158.1172	11,194.1705	11,271.7227	11,266.573	11,252.5772	11,272.3874	11,112.0207	10,747.4827		10,768.593	10,912.558	10,959.4379	10,925.85	10,860.2769		10,932.953	10,957.3429	10,813.3467	10,957.2432	10,791.3255	10,761.084	10,524.0239	10,543.1453	10,761.4058	10,900.9197	10,748.2902	10,801.687	10,690.2701	10,854.9778	11,092.9293	11,116.9027		11,338.4186	11,332.3397	11,302.0242	11,335.0379	11,391.1244	11,401.2175	11,349.2907	11,351.1204	11,345.4832	11,308.073	11,278.8458	11,363.8021	11,334.2914	11,304.2623	11,250.2198	11,265.9485	11,257.8804	11,265.4026	11,180.4483	11,140.3365	10,917.1313	10,960.387	11,139.9403	11,083.6723	10,983.0628	10,957.7591	10,946.9891	10,921.9127	10,978.9243	10,923.186	10,852.2809	10,818.6194	10,733.213	10,721.8746		10,658.8062	10,624.085	10,554.6497	10,477.5921	10,415.0823	10,434.8742	10,469.3203	10,466.842	10,442.8043	10,418.0957	10,350.2178	10,384.0594	10,382.2696	10,401.1666	10,435.6391	10,396.8253	10,474.5569	10,472.8467	10,521.555	10,461.6654	10,416.1716	10,442.252	10,353.4418		10,285.7275	10,276.3614	10,222.6427	10,170.4568	10,111.5994	10,366.5983	10,422.1135	10,441.3729	10,440.0842	10,431.7549	10,337.6854	10,350.0931	10,305.4265	10,318.0829	10,301.88	10,216.297	10,186.5326	10,184.1416	10,154.1888	10,096.1531	10,087.463	10,044.0597	10,041.7181	10,068.139	10,080.4413	10,079.2415	10,138.8323	10,027.1034	10,032.1627	10,029.7912	9,999.9992
Thornburg Intermediate Municipal Fund - Class A
Account Value [Line Items]
Account Value	11,776.1929	11,672.5322	11,604.8603	11,511.1108	11,374.0107	11,385.0112	11,482.2258	11,450.192	11,426.5104	11,438.2997	11,243.7403	10,759.6464		10,822.5449	11,013.2964	11,102.367	11,056.2166	10,976.6286		11,048.6491	11,053.9176	10,893.2639	11,047.7281	10,846.9381	10,811.9074	10,520.9791	10,578.1666	10,833.5357	10,990.2517	10,794.7247	10,877.9503	10,757.6214	10,978.7995	11,283.4129	11,326.46		11,590.0268	11,585.9913	11,516.4608	11,560.36	11,635.5585	11,654.6087	11,585.2363	11,555.0003	11,533.4843	11,463.6784	11,410.3164	11,545.8033	11,476.5147	11,415.412	11,282.7429	11,316.3319	11,317.7088	11,350.7889	11,187.641	11,070.9218	10,821.6392	10,945.6158	11,356.9325	11,232.367	11,055.7733	11,033.7656	11,019.0864	11,012.691	11,089.75	10,959.9266	10,883.7225	10,838.0858	10,717.3894	10,688.3533		10,584.1889	10,539.2255	10,465.7611	10,384.8491	10,296.372	10,350.8142	10,398.1234	10,385.3989	10,365.4802	10,352.5036	10,265.8	10,297.2682	10,277.6694	10,308.4549	10,407.3719	10,329.5088	10,376.4503	10,372.6999	10,412.4183	10,342.7897	10,294.9485	10,326.659	10,198.8104		10,128.9764	10,110.8434	10,062.7255	10,045.0623	9,969.9225	10,297.3517	10,380.8793	10,420.6081	10,411.1717	10,430.1228	10,291.4746	10,274.912	10,215.3363	10,192.0231	10,189.7892	10,095.9457	10,029.4038	10,004.0562	9,964.8966	9,912	9,902.417	9,850.6496	9,861.7469	9,893.793	9,939.1942	9,922.4152	10,015.0353	9,887.3292	9,849.486	9,852.3432	9,800.2721
Thornburg Intermediate Municipal Fund - Class C
Account Value [Line Items]
Account Value	11,603.194	11,504.7238	11,433.1002	11,344.3176	11,212.6469	11,235.541	11,326.2066	11,298.1326	11,286.5396	11,301.6695	11,104.6884	10,638.4763		10,695.4914	10,895.534	10,986.9453	10,944.7565	10,869.3548		10,943.9866	10,952.5056	10,788.6307	10,952.8526	10,757.3942	10,717.8345	10,440.9651	10,492.7461	10,757.3183	10,916.1358	10,717.3961	10,811.3378	10,695.2076	10,918.1115	11,224.1666	11,262.0412		11,535.6213	11,535.2188	11,469.5541	11,516.8221	11,587.1422	11,617.7217	11,552.2598	11,525.6589	11,507.8174	11,441.7129	11,384.1485	11,522.5219	11,464.8879	11,407.494	11,278.4893	11,315.5909	11,320.3922	11,357.0012	11,189.6785	11,076.3525	10,830.4497	10,965.5284	11,380.5742	11,259.171	11,085.7134	11,059.2116	11,055.3944	11,052.2839	11,132.9914	11,006.4232	10,933.5456	10,890.6808	10,764.927	10,746.3291		10,644.7811	10,602.3548	10,531.5508	10,445.6616	10,367.175	10,424.965	10,475.1063	10,465.4736	10,448.6582	10,438.6684	10,354.4929	10,389.2399	10,372.6314	10,406.5023	10,509.1167	10,426.0273	10,476.1563	10,482.6401	10,525.335	10,457.8918	10,412.3425	10,447.0783	10,320.7571		10,252.9073	10,229.9768	10,191.1306	10,176.0368	10,102.7693	10,436.9129	10,524.3913	10,567.621	10,560.8772	10,582.9616	10,445.2388	10,431.2271	10,373.5296	10,352.7272	10,352.5475	10,260.2214	10,195.4535	10,165.2798	10,135.4062	10,084.1248	10,069.6879	10,019.7794	10,040.7999	10,076.1973	10,125.1293	10,110.8007	10,207.5743	10,080.4275	10,044.6673	10,050.2402	9,999.9945
Thornburg Intermediate Municipal Fund - Class C2
Account Value [Line Items]
Account Value	10,252.4338	10,165.3978	10,109.6656	10,031.1984	9,907.276	9,927.4934	10,015.1314	9,990.3189	9,972.6725	9,986.0136	9,811.9777	9,400.0164		9,450.3828	9,627.137	9,707.8846	9,670.5946	9,603.9583		9,669.9024	9,677.4234	9,532.6205	9,677.7203	9,505.0137	9,477.0674	9,225.2761	9,271.0093	9,504.757	9,645.0654	9,476.6457	9,552.4913	9,449.8668	9,646.776	9,917.2608	9,957.8981		10,192.4991	10,192.1306	10,134.0965	10,175.8568	10,245.0676	10,265.0946	10,207.2706	10,183.74	10,168.0401	10,109.6237	10,065.9551	10,188.2036	10,130.3016	10,079.9214	9,966.8632	9,999.9995
Thornburg Intermediate Municipal Fund - Class I
Account Value [Line Items]
Account Value	12,323.6381	12,212.6466	12,139.3191	12,038.7102	11,892.8174	11,901.9395	12,001.3995	11,965.4788	11,938.4819	11,957.4173	11,742.6099	11,243.0808		11,297.7041	11,503.7415	11,594.5364	11,535.1866	11,458.6081		11,522.7682	11,526.0286	11,356.0049	11,523.896	11,312.0305	11,264.5785	10,958.9189	11,016.3584	11,289.0909	11,450.2017	11,235.5704	11,328.6485	11,201.0323	11,429.2815	11,735.8025	11,778.5054		12,050.5141	12,043.8827	11,969.1877	12,020.8348	12,088.3498	12,105.7165	12,031.1336	11,997.3617	11,972.5854	11,897.7133	11,839.8759	11,978.4739	11,904.1073	11,838.272	11,698.2331	11,730.7519	11,729.9098	11,761.8809	11,590.2938	11,466.9902	11,206.2119	11,332.5754	11,764.7432	11,625.4418	11,439.965	11,414.7037	11,397.1324	11,388.0554	11,465.4322	11,328.5601	11,247.2497	11,197.978	11,071.0217	11,046.7228		10,928.9461	10,880.4566	10,802.3214	10,716.4887	10,622.9441	10,676.992	10,731.3775	10,716.0794	10,685.6984	10,670.2424	10,578.6798	10,609.1491	10,594.5068	10,624.3898	10,716.0141	10,632.9783	10,678.6879	10,672.064	10,710.4038	10,643.5026	10,583.9958	10,613.996	10,479.7818		10,405.4445	10,384.2823	10,332.501	10,319.1883	10,231.9734	10,573.3868	10,656.5139	10,687.527	10,675.0354	10,699.0844	10,546.9178	10,527.0759	10,470.6861	10,436.8555	10,439.046	10,333.0527	10,269.4542	10,233.7627	10,191.1979	10,134.798	10,122.3588	10,067.0303	10,076.1138	10,113.573	10,150.5675	10,130.8459	10,223.0878	10,089.9482	10,048.5287	10,048.8937	10,000.0017
Thornburg Strategic Municipal Income Fund Class A
Account Value [Line Items]
Account Value	11,838.235	11,754.0999	11,661.4135	11,544.755	11,395.6787	11,386.4934	11,491.4436	11,425.4513	11,383.5348	11,415.2031	11,188.8395	10,626.2302		10,722.4308	10,963.1167	11,068.0001	11,021.8443	10,928.7582		11,009.9793	11,012.7031	10,842.4668	11,025.2379	10,779.8499	10,744.8999	10,360.7489	10,459.442	10,807.1759	10,992.5754	10,770.0877	10,932.7903	10,834.2224	11,097.3417	11,423.3909	11,473.1922		11,746.3038	11,744.6122	11,666.116	11,717.1408	11,789.9633	11,817.7847	11,739.6861	11,706.8084	11,681.699	11,602.9795	11,554.548	11,684.5949	11,605.2375	11,525.0159	11,391.0382	11,414.3654	11,414.8915	11,437.2761	11,243.3342	11,079.3	10,834.4439	11,001.0155	11,490.1961	11,349.038	11,181.24	11,152.0367	11,136.8088	11,129.214	11,200.8328	11,069.397	11,002.7771	10,957.1775	10,840.4239	10,809.5		10,700.3578	10,654.5958	10,589.1171	10,516.2372	10,443.0451	10,491.1225	10,532.4985	10,517.3616	10,495.5486	10,480.4718	10,395.6426	10,422.4478	10,401.2756	10,427.8626	10,511.1439	10,427.3523	10,460.7266	10,453.1859	10,480.0094	10,403.8722	10,348.6349	10,375.6593	10,245.0654		10,182.8871	10,162.4628	10,120.5866	10,103.1834	10,038.5308	10,385.8471	10,477.3611	10,513.8189	10,497.9435	10,522.0132	10,377.6217	10,340.5151	10,275.7625	10,238.3272	10,239.7425	10,142.1928	10,056.2041	10,041.3567	10,013.4377	9,959.5903	9,946.4047	9,881.1076	9,894.3807	9,927.9932	9,987.7941	9,956.8147	10,068.0217	9,921.2582	9,864.4473	9,857.4932	9,799.9956
Thornburg Strategic Municipal Income Fund Class C
Account Value [Line Items]
Account Value	11,576.1718	11,490.3288	11,404.2916	11,302.7637	11,153.2467	11,148.6823	11,255.6881	11,195.5271	11,166.5289	11,201.9749	10,976.7049	10,436.9057		10,527.5626	10,767.8869	10,875.144	10,834.1028	10,754.572		10,830.9753	10,837.8292	10,674.6328	10,858.3834	10,621.032	10,590.8855	10,216.3786	10,317.786	10,672.3879	10,859.583	10,644.2775	10,809.0226	10,708.368	10,980.038	11,306.7897	11,360.1181		11,634.8989	11,637.8382	11,557.0303	11,619.6978	11,696.3397	11,728.5488	11,655.7513	11,627.6682	11,599.898	11,533.68	11,490.1556	11,623.5444	11,541.8285	11,466.6502	11,337.7906	11,365.5594	11,377.8472	11,404.6634	11,215.9453	11,049.3713	10,809.57	10,987.2158	11,472.3674	11,342.9938	11,172.4572	11,155.0956	11,144.0897	11,140.8131	11,209.474	11,089.6578	11,027.3643	10,985.9321	10,866.1128	10,839.2929		10,734.174	10,692.1195	10,637.8162	10,568.8751	10,499.4199	10,551.893	10,597.523	10,586.4392	10,568.7203	10,557.6152	10,476.4337	10,500.2484	10,490.1913	10,520.775	10,609.2875	10,529.3195	10,560.3164	10,564.0792	10,595.5719	10,523.2051	10,471.9104	10,503.5715	10,375.8726		10,310.4526	10,300.55	10,262.1401	10,247.1157	10,184.1152	10,538.6103	10,627.1999	10,673.5707	10,660.1602	10,687.2749	10,543.348	10,508.3533	10,445.1732	10,409.7782	10,406.9181	10,317.1782	10,232.3826	10,219.7712	10,187.2466	10,141.6693	10,130.825	10,060.2607	10,076.2244	10,119.6432	10,183.0202	10,154.0286	10,263.0079	10,122.6636	10,067.3154	10,056.0806	10,000.004
Thornburg Strategic Municipal Income Fund Class I
Account Value [Line Items]
Account Value	12,385.0716	12,286.2933	12,187.1827	12,063.0771	11,905.2491	11,893.4128	12,000.7525	11,929.6294	11,883.7932	11,914.5902	11,676.3197	11,096.0402		11,185.8644	11,434.6341	11,541.7808	11,491.5165	11,400.7123		11,474.9213	11,475.6612	11,296.29	11,484.6054	11,227.0176	11,188.5579	10,786.9159	10,887.5497	11,255.2281	11,437.8386	11,212.4254	11,371.5207	11,267.0116	11,538.329	11,882.843	11,932.6006		12,213.9507	12,209.9057	12,118.3184	12,176.8711	12,242.3279	12,268.854	12,193.377	12,157.0704	12,120.9409	12,044.9138	11,992.442	12,125.178	12,032.9217	11,947.557	11,806.6268	11,828.5666	11,834.6485	11,847.9101	11,652.6244	11,473.1337	11,217.6695	11,387.9335	11,891.7436	11,751.2939	11,568.0676	11,543.2501	11,525.4198	11,507.8784	11,579.7719	11,449.3101	11,370.9032	11,321.7471	11,199.0737	11,165.1264		11,050.3985	11,001.3049	10,939.0469	10,861.8169	10,784.3736	10,831.9089	10,872.5933	10,854.8662	10,830.3347	10,805.594	10,716.1906	10,741.833	10,725.1895	10,750.725	10,827.2045	10,746.0329	10,771.274	10,768.5876	10,794.2016	10,713.8679	10,655.0583	10,673.8528	10,544.57		10,471.8046	10,455.8057	10,411.0119	10,390.3626	10,321.1955	10,675.0426	10,759.0879	10,800.5019	10,781.277	10,803.02	10,652.189	10,611.1669	10,542.0392	10,500.784	10,492.5788	10,396.512	10,305.6109	10,288.0959	10,250.187	10,192.9061	10,183.8907	10,107.8654	10,119.0915	10,157.2328	10,215.3607	10,174.2871	10,285.2826	10,132.4536	10,078.1053	10,061.62	10,000.004
Thornburg California Limited Term Municipal Fund - Class A
Account Value [Line Items]
Account Value	10,878.7079	10,811.068	10,694.0948	10,618.478	10,518.6514	10,559.8464	10,633.4701	10,616.9911	10,608.4069	10,633.06	10,486.8027	10,177.9609		10,194.7636	10,318.3044	10,354.1052	10,324.6464	10,271.2641		10,331.814	10,352.2708	10,213.3464	10,344.7579	10,207.3088	10,181.9016	9,989.5927	10,005.6189	10,204.399	10,316.5438	10,177.0032	10,219.8292	10,105.2112	10,258.1932	10,453.6482	10,489.5355		10,684.0133	10,690.4179	10,672.5639	10,694.5643	10,739.2902	10,737.5627	10,703.9454	10,716.2657	10,713.78	10,688.0224	10,663.1993	10,744.5408	10,727.8026	10,710.6493	10,662.335	10,684.4016	10,674.8934	10,688.7506	10,624.9629	10,606.2413	10,417.0383	10,457.804	10,659.3724	10,614.6495	10,526.4752	10,506.8995	10,501.9809	10,482.2446	10,537.8172	10,494.296	10,435.4213	10,406.1934	10,331.8682	10,333.012		10,281.6217	10,251.4549	10,200.2527	10,141.838	10,090.4144	10,114.9649	10,154.6422	10,149.3266	10,129.3868	10,116.0561	10,035.9838	10,066.8316	10,076.4019	10,106.9286	10,147.0005	10,112.9453	10,197.4813	10,208.472	10,255.9842	10,200.4356	10,159.5584	10,184.585	10,092.1187		10,043.4243	10,039.8678	9,998.2922	9,943.3175	9,889.1685	10,156.5234	10,219.4639	10,230.3402	10,227.5479	10,224.601	10,147.9436	10,166.7593	10,126.7548	10,145.3279	10,126.0567	10,042.9203	10,010.4443	10,006.3065	9,988.0512	9,940.3698	9,928.1519	9,881.753	9,884.6198	9,916.928	9,941.4751	9,937.5664	10,003.8153	9,878.7275	9,874.4802	9,884.1781	9,850.537
Thornburg California Limited Term Municipal Fund - Class C
Account Value [Line Items]
Account Value	10,750.7106	10,686.3404	10,573.295	10,501.0671	10,404.7764	10,456.2228	10,531.426	10,509.4927	10,511.4587	10,530.2896	10,387.969	10,084.5345		10,111.5901	10,228.2795	10,266.1791	10,239.4173	10,188.8638		10,251.3025	10,273.9323	10,146.4765	10,271.111	10,137.1423	10,114.304	9,925.6703	9,943.9416	10,143.6953	10,257.5349	10,121.2924	10,166.1869	10,054.6144	10,209.0682	10,405.9998	10,443.9395		10,639.9712	10,648.898	10,633.5808	10,658.0342	10,705.0538	10,705.8875	10,674.9283	10,689.6763	10,689.745	10,666.5269	10,644.2916	10,727.7438	10,713.5755	10,706.7573	10,653.2431	10,677.8782	10,670.8489	10,687.2342	10,626.0749	10,609.7994	10,430.8098	10,466.288	10,670.3888	10,635.6781	10,542.1112	10,532.8229	10,522.7927	10,505.6468	10,571.5137	10,530.5404	10,466.4666	10,447.1297	10,367.3397	10,370.7512		10,321.6865	10,293.6049	10,244.6042	10,188.3316	10,138.9792	10,165.988	10,208.0468	10,212.635	10,187.4541	10,176.2918	10,105.5633	10,138.7821	10,143.1569	10,175.893	10,225.9529	10,186.4623	10,273.8214	10,287.2297	10,337.4497	10,283.8789	10,244.9764	10,272.3784	10,188.7738		10,134.2857	10,132.7371	10,092.647	10,039.2217	9,986.6055	10,258.4734	10,324.1723	10,344.6277	10,343.9419	10,335.7145	10,260.3366	10,281.4748	10,243.0805	10,263.9733	10,246.4872	10,164.5183	10,133.8095	10,131.6877	10,115.3475	10,068.8526	10,058.3646	10,013.3138	10,018.1156	10,052.8195	10,079.6144	10,077.7923	10,146.85	10,029.2836	10,019.9487	10,031.9088	10,000.0047
Thornburg California Limited Term Municipal Fund - Class C2
Account Value [Line Items]
Account Value	10,068.171	10,007.8857	9,902.0023	9,834.3374	9,744.153	9,784.6111	9,855.0262	9,842.0864	9,836.2901	9,861.4522	9,728.1627	9,444.0488		9,461.8412	9,578.6032	9,614.077	9,589.0024	9,541.6418		9,600.1062	9,621.2914	9,494.495	9,618.6269	9,485.7472	9,471.7568	9,295.0978	9,304.8307	9,499.2468	9,605.844	9,478.2361	9,512.9146	9,416.9377	9,561.4235	9,745.7878	9,781.3102		9,964.9368	9,973.2543	9,958.8958	9,981.7793	10,025.8032	10,026.555	9,997.5445	10,013.0113	10,013.0557	9,990.9173	9,969.7752	10,047.6047	10,033.9554	10,020.0804	9,977.2187	10,000.0005
Thornburg California Limited Term Municipal Fund - Class I
Account Value [Line Items]
Account Value	11,353.1476	11,280.334	11,156.1017	11,066.3394	10,960.1099	11,009.2263	11,083.5629	11,055.509	11,052.8913	11,067.6901	10,913.2323	10,589.9293		10,613.5699	10,731.318	10,766.2232	10,733.3197	10,675.6689		10,736.2441	10,755.2411	10,617.0872	10,743.1013	10,598.2254	10,569.6128	10,368.0209	10,382.4361	10,594.5378	10,700.2953	10,553.4555	10,595.6554	10,474.7199	10,630.9774	10,831.121	10,866.1957		11,065.1195	11,069.3783	11,048.6279	11,069.0228	11,112.9944	11,116.9242	11,071.7382	11,082.1975	11,085.3182	11,056.4713	11,020.4528	11,102.2958	11,090.6702	11,070.6246	11,010.5058	11,038.9185	11,018.8747	11,030.8122	10,962.7239	10,941.1814	10,751.8161	10,783.6712	10,989.0458	10,948.7158	10,847.7575	10,833.2343	10,818.134	10,795.5969	10,858.6107	10,811.7323	10,741.2508	10,716.5586	10,637.6425	10,628.6426		10,581.1944	10,548.0206	10,493.0021	10,422.8856	10,367.8476	10,390.77	10,428.8564	10,428.893	10,406.3295	10,382.9355	10,306.3315	10,335.9066	10,343.8018	10,365.5551	10,411.5505	10,366.4192	10,450.5136	10,459.2323	10,505.5818	10,446.2016	10,401.8855	10,425.0617	10,335.4544		10,275.653	10,269.4371	10,224.599	10,165.8027	10,107.8307	10,385.7325	10,439.8416	10,455.8856	10,450.2809	10,444.5452	10,356.3266	10,380.132	10,336.7099	10,345.5071	10,323.2794	10,235.8476	10,207.3772	10,200.4557	10,171.7585	10,120.713	10,105.4088	10,062.8531	10,063.2171	10,093.4982	10,108.6791	10,102.0581	10,166.94	10,044.4078	10,029.9622	10,037.0305	10,000.0047
Thornburg New Mexico Intermediate Municipal Fund - Class A
Account Value [Line Items]
Account Value	11,142.7321	11,081.9269	11,012.7146	10,935.4482	10,831.6124	10,887.8498	10,961.0053	10,938.1977	10,923.1699	10,970.8209	10,800.2019	10,368.3259		10,424.4278	10,602.4226	10,703.1042	10,666.1114	10,612.1523		10,697.6536	10,723.6392	10,570.8912	10,750.2045	10,556.2613	10,508.7023	10,247.3144	10,285.371	10,560.0429	10,742.0764	10,533.5386	10,620.7906	10,505.8048	10,703.2612	10,977.5908	10,996.8566		11,262.6953	11,250.6131	11,219.1001	11,239.0222	11,308.896	11,329.0128	11,265.4382	11,251.6616	11,238.6939	11,175.2232	11,137.7217	11,280.7702	11,251.5592	11,214.0699	11,116.5482	11,144.1721	11,138.3962	11,190.2834	11,069.4931	10,997.186	10,759.3313	10,848.6265	11,109.0805	11,015.9369	10,875.2139	10,857.365	10,846.6073	10,835.8879	10,897.0151	10,787.7245	10,718.6598	10,681.4604	10,596.5091	10,583.3526		10,498.7764	10,468.2886	10,407.7795	10,339.7542	10,270.6093	10,305.165	10,340.043	10,319.8237	10,290.4833	10,260.8366	10,182.9787	10,198.568	10,192.0239	10,200.0553	10,264.2804	10,212.5153	10,269.4987	10,280.7537	10,337.7918	10,295.0203	10,251.7233	10,277.0094	10,187.9931		10,129.4996	10,116.8755	10,072.6875	10,059.9963	10,002.3396	10,255.5365	10,320.2212	10,352.9389	10,342.1588	10,369.2385	10,260.7508	10,264.865	10,208.6193	10,197.8244	10,201.2134	10,101.3728	10,053.5603	10,034.617	10,008.8566	9,953.712	9,936.432	9,890.408	9,907.4504	9,936.8662	9,966.1244	9,937.954	10,010.4044	9,888.1288	9,859.6133	9,864.7876	9,798.2696
Thornburg New Mexico Intermediate Municipal Fund - Class D
Account Value [Line Items]
Account Value	11,084.548	11,035.128	10,968.5427	10,893.925	10,792.7569	10,842.2785	10,926.1152	10,905.6854	10,892.8537	10,933.9322	10,766.1294	10,346.3521		10,404.4639	10,575.5191	10,686.8334	10,652.1657	10,591.8982		10,688.1133	10,707.677	10,557.3652	10,738.5237	10,555.5389	10,510.2413	10,242.5906	10,282.8222	10,568.1352	10,743.9613	10,546.0843	10,627.0732	10,522.6786	10,722.4996	10,999.4522	11,020.8508		11,281.066	11,279.7628	11,250.4673	11,272.7947	11,336.7465	11,359.3153	11,306.3737	11,294.7858	11,284.3041	11,214.7048	11,187.8476	11,333.7338	11,306.904	11,271.7657	11,176.2202	11,206.4802	11,202.9075	11,249.1636	11,130.0538	11,067.8156	10,822.5126	10,914.4722	11,187.367	11,096.1051	10,957.0625	10,941.6014	10,925.0198	10,924.9129	10,989.1209	10,873.5274	10,814.6976	10,779.4864	10,688.0838	10,677.1335		10,602.2195	10,573.5559	10,514.7758	10,440.3748	10,372.7951	10,418.0437	10,455.2626	10,437.1206	10,409.8237	10,382.1123	10,305.6425	10,323.6115	10,320.3254	10,329.3893	10,396.587	10,338.5223	10,406.188	10,419.7867	10,479.7273	10,430.8595	10,396.8999	10,423.9685	10,328.174		10,278.8093	10,259.7005	10,224.4818	10,213.7272	10,156.601	10,415.6535	10,483.5175	10,510.8939	10,509.8192	10,539.5051	10,431.1663	10,437.4773	10,382.3813	10,373.488	10,371.3819	10,272.012	10,233.0827	10,215.9302	10,184.4104	10,130.0355	10,121.5299	10,076.3008	10,095.2894	10,126.9418	10,151.2593	10,124.6446	10,207.7693	10,077.8584	10,050.879	10,058.2405	10,000.0019
Thornburg New Mexico Intermediate Municipal Fund - Class I
Account Value [Line Items]
Account Value	11,737.2375	11,679.4269	11,603.3229	11,518.7908	11,397.1535	11,453.2542	11,536.5083	11,500.1688	11,490.6854	11,528.5178	11,346.0348	10,898.3249		10,954.309	11,129.3	11,241.1019	11,190.1621	11,130.6158		11,226.3287	11,241.6221	11,078.3904	11,263.6877	11,066.2916	11,013.4369	10,727.7884	10,764.7261	11,058.3954	11,237.0485	11,024.6503	11,104.1862	10,989.7749	11,193.3622	11,477.0837	11,494.4139		11,760.252	11,753.2195	11,708.444	11,734.8088	11,795.8988	11,813.6924	11,744.1967	11,726.6587	11,718.7976	11,641.0333	11,607.5232	11,753.7888	11,720.2877	11,669.5717	11,565.1279	11,590.8811	11,581.7599	11,632.6087	11,503.8425	11,434.1577	11,175.2079	11,264.9603	11,532.78	11,433.4438	11,293.0294	11,271.6614	11,249.3336	11,235.4016	11,304.6577	11,180.2709	11,106.0346	11,073.0017	10,973.7708	10,957.4171		10,875.2563	10,832.852	10,775.6069	10,694.1831	10,619.9816	10,661.209	10,686.136	10,670.7924	10,637.9838	10,604.9128	10,513.7803	10,527.3991	10,518.1944	10,532.1878	10,595.5608	10,531.1906	10,595.0848	10,595.7316	10,652.0931	10,604.9943	10,557.3867	10,588.4656	10,485.9461		10,430.7536	10,407.0447	10,358.9709	10,350.8735	10,280.9191	10,546.2629	10,609.8475	10,632.9651	10,626.6325	10,643.8296	10,529.6328	10,538.5241	10,477.932	10,463.9414	10,456.9908	10,351.6525	10,307.295	10,284.9888	10,248.0875	10,188.7542	10,175.6655	10,118.3274	10,133.073	10,160.4289	10,187.8524	10,156.4081	10,228.0694	10,100.3741	10,068.2833	10,070.7789	9,999.9977
Thornburg New York Intermediate Municipal Fund - Class A
Account Value [Line Items]
Account Value	11,237.8992	11,182.7464	11,118.4628	11,054.78	10,936.422	10,965.6068	11,022.3551	11,006.9158	10,999.2582	11,040.1646	10,850.7339	10,427.4202		10,484.6195	10,658.6289	10,734.3943	10,704.1925	10,647.2215		10,698.8698	10,705.716	10,579.1638	10,709.0278	10,539.2588	10,510.9681	10,279.1522	10,304.4114	10,487.3148	10,635.5491	10,477.2664	10,562.6425	10,456.6639	10,630.0585	10,900.3758	10,933.9014		11,169.3601	11,161.8936	11,110.1513	11,137.2845	11,224.304	11,251.8144	11,176.3901	11,159.9444	11,144.9395	11,075.7863	11,041.626	11,176.6638	11,133.9076	11,090.9438	10,962.7774	11,005.3728	11,012.8181	11,080.2923	10,961.5177	10,884.3234	10,596.9391	10,755.1238	11,081.004	10,970.2447	10,810.3707	10,792.2956	10,781.2279	10,778.9973	10,867.034	10,756.3452	10,687.5693	10,658.3283	10,555.7504	10,534.3744		10,439.689	10,400.9397	10,338.5214	10,268.5256	10,198.2411	10,250.1394	10,301.6431	10,296.8527	10,284.5797	10,247.4375	10,187.2615	10,214.5162	10,226.502	10,253.2693	10,321.657	10,262.9386	10,315.6117	10,319.881	10,362.1722	10,308.9546	10,263.1597	10,288.5602	10,204.1906		10,142.8378	10,136.7806	10,090.4686	10,053.598	9,986.4674	10,300.1141	10,373.8244	10,404.8746	10,378.6022	10,406.4116	10,287.5906	10,284.5045	10,227.5209	10,209.6051	10,206.4112	10,105.2377	10,042.3477	10,008.7567	9,983.1251	9,927.1334	9,917.5858	9,855.4399	9,866.5418	9,894.5819	9,944.2859	9,919.2889	10,034.4922	9,889.9187	9,842.4585	9,839.238	9,799.8538
Thornburg New York Intermediate Municipal Fund - Class I
Account Value [Line Items]
Account Value	11,838.9304	11,777.7491	11,706.8862	11,636.7027	11,509.1039	11,536.6734	11,593.328	11,573.9768	11,562.9876	11,602.8536	11,400.7026	10,953.1238		11,010.2274	11,189.9852	11,266.4765	11,231.7252	11,169.0142		11,229.5129	11,224.38	11,088.7207	11,222.0686	11,041.177	11,008.5704	10,763.03	10,786.5267	10,975.065	11,136.3318	10,958.5917	11,044.9942	10,931.2486	11,118.694	11,388.9539	11,421.1774		11,663.9171	11,653.0257	11,595.9721	11,621.1474	11,708.853	11,734.3643	11,652.5224	11,632.3126	11,613.5175	11,538.4256	11,499.7179	11,637.5114	11,589.8485	11,541.9956	11,405.6263	11,446.8293	11,460.371	11,518.5979	11,392.0568	11,308.8753	11,007.3616	11,168.714	11,504.0244	11,394.8778	11,217.3507	11,195.5676	11,181.1658	11,175.7982	11,264.1036	11,146.3531	11,072.0808	11,038.8525	10,929.6512	10,904.6784		10,803.7542	10,761.0185	10,693.5664	10,618.2874	10,542.8666	10,593.6484	10,644.0605	10,636.1969	10,620.639	10,579.5117	10,514.5225	10,539.8429	10,549.3428	10,574.3847	10,642.0106	10,578.6016	10,630.0564	10,631.504	10,672.2598	10,614.573	10,564.5493	10,587.9024	10,498.2322		10,432.3703	10,423.3133	10,373.1442	10,332.4281	10,260.6607	10,580.0698	10,652.866	10,681.9525	10,652.0959	10,677.731	10,553.0607	10,547.0321	10,485.8498	10,464.6609	10,458.7312	10,352.2588	10,285.0418	10,247.9573	10,218.9285	10,158.3134	10,145.7882	10,079.4872	10,089.7261	10,115.4918	10,163.6124	10,135.3075	10,250.4864	10,100.0624	10,048.8597	10,042.9303	10,000.0046
Thornburg Emerging Markets Managed Account Fund - Class I
Account Value [Line Items]
Account Value	10,666.6892	10,666.6892	10,666.6892	10,747.1167	10,324.8726	10,214.2849	10,535.9946	10,264.552	9,691.5065	10,324.8726	9,910	9,360	10,000
Thornburg Municipal Managed Account Fund - Class I
Account Value [Line Items]
Account Value	11,105.7907	10,969.4906	10,866.5678	10,731.8429	10,586.5591	10,538.0876	10,625.2902	10,535.4002	10,467.5432	10,460.5139	10,239.6294	9,701.8796		9,826.2067	10,041.3054	10,113.8107	10,033.7562	9,994.6706	$ 10,000
C 000161463 [Member]
Account Value [Line Items]
Account Value	11,988.01	11,935.66	11,879.78	11,824.01	11,770.27	11,714.92	11,661.64	11,606.89	11,555.95	11,501.61	11,447.05	11,394.79		11,341.14	11,289.67	11,237.22	11,186.24	11,137.27		11,087.59	11,040.79	10,994.1	10,953.8	10,911.34	10,870.89	10,834.46	10,802.37	10,777.57	10,754.86	10,737.61	10,725.91	10,717.36	10,711.53	10,706.92	10,705.19		10,703.45	10,701.88	10,700.87	10,699.91	10,699.05	10,698.17	10,697.28	10,696.36	10,695.38	10,694.27	10,693.02	10,691.98	10,690.82	10,689.62	10,688.56	10,687.45	10,686.65	10,685.87	10,684.5	10,682.94	10,678.56	10,669.39	10,651.82	10,637.43	10,622.37	10,606.27	10,590.86	10,573.02	10,554.09	10,533.99	10,512.24	10,490.48	10,467.65	10,445.39		10,422.24	10,401.52	10,378.93	10,357.26	10,337.12	10,316.7	10,298.91	10,280.98	10,262.9	10,245.76	10,228.92	10,211.83	10,196.14	10,183.61	10,170.04	10,157.98	10,147.69	10,137.19	10,127.13	10,116.84	10,106.51	10,097.62	10,089.08		10,081.11	10,074.14	10,068.57	10,062.52	10,057.49	10,053.48	10,049.44	10,045.43	10,041.35	10,037.25	10,033.27	10,029.16	10,024.92	10,020.38	10,016.22	10,012	10,008.78	10,006.68	10,004.35	10,002.22	10,000
M S C I All Country World Net Total Return U S D Index 1 [Member]
Account Value [Line Items]
Account Value	24,525.7216	23,968.8998	23,375.2263	23,004.2603	22,503.0355	21,624.7737	22,362.6052	21,681.8618	20,789.7007	20,668.5483	19,721.2696	18,054.8514		18,614.5489	19,417.4566	19,975.663	19,270.2098	18,212.749		18,409.9478	18,149.1107	17,606.2413	18,125.7322	16,913.4626	17,606.2413	16,338.9605	15,409.0425	17,040.3131	17,691.6605	16,536.8516	18,059.165	18,038.0232	19,607.4662	19,191.767	19,700.6071		20,718.1276	19,921.2376	20,412.8235	19,421.4506	20,258.3342	19,763.6596	19,628.3949	19,373.0962	19,076.2595	18,277.1328	17,801.6296	17,398.658	17,478.1127	16,702.6307	14,869.7412	15,240.2279	15,748.003	14,839.706	14,094.3125	13,657.8975	13,088.6676	11,822.1855	13,667.3235	14,868.2501	15,034.2955	14,522.8991	14,176.8026	13,799.1266	13,514.8046	13,843.1675	13,802.7479	12,954.468	13,771.3814	13,321.5465		13,156.1402	12,813.3987	11,875.5991	12,775.5352	12,591.3835	13,611.407	13,552.4017	13,446.7994	13,053.1473	13,124.1879	13,107.839	12,983.8641	13,267.8667	13,849.5047	13,109.9159	12,901.9065	12,656.8857	12,399.4036	12,164.3945	12,117.9572	11,788.5291	11,735.1688	11,481.6274		11,305.4106	11,168.8146	10,864.043	10,574.8749	10,351.2621	10,273.192	10,450.5805	10,386.9422	10,352.1142	9,924.4328	9,984.8759	9,972.308	9,827.2446	9,149.2172	9,212.5892	9,803.8662	9,983.9174	10,067.0465	9,334.4339	9,685.3233	10,398.1255	10,308.6058	10,557.1413	10,570.9341	10,272.8725	10,434.5511	9,884.2795	10,041.2717	10,238.8433	10,070.4015	10,000
M S C I All Country World Net Total Return U S D Index 13 [Member]
Account Value [Line Items]
Account Value	24,525.7216	23,968.8998	23,375.2263	23,004.2603	22,503.0355	21,624.7737	22,362.6052	21,681.8618	20,789.7007	20,668.5483	19,721.2696	18,054.8514		18,614.5489	19,417.4566	19,975.663	19,270.2098	18,212.749		18,409.9478	18,149.1107	17,606.2413	18,125.7322	16,913.4626	17,606.2413	16,338.9605	15,409.0425	17,040.3131	17,691.6605	16,536.8516	18,059.165	18,038.0232	19,607.4662	19,191.767	19,700.6071		20,718.1276	19,921.2376	20,412.8235	19,421.4506	20,258.3342	19,763.6596	19,628.3949	19,373.0962	19,076.2595	18,277.1328	17,801.6296	17,398.658	17,478.1127	16,702.6307	14,869.7412	15,240.2279	15,748.003	14,839.706	14,094.3125	13,657.8975	13,088.6676	11,822.1855	13,667.3235	14,868.2501	15,034.2955	14,522.8991	14,176.8026	13,799.1266	13,514.8046	13,843.1675	13,802.7479	12,954.468	13,771.3814	13,321.5465		13,156.1402	12,813.3987	11,875.5991	12,775.5352	12,591.3835	13,611.407	13,552.4017	13,446.7994	13,053.1473	13,124.1879	13,107.839	12,983.8641	13,267.8667	13,849.5047	13,109.9159	12,901.9065	12,656.8857	12,399.4036	12,164.3945	12,117.9572	11,788.5291	11,735.1688	11,481.6274		11,305.4106	11,168.8146	10,864.043	10,574.8749	10,351.2621	10,273.192	10,450.5805	10,386.9422	10,352.1142	9,924.4328	9,984.8759	9,972.308	9,827.2446	9,149.2172	9,212.5892	9,803.8662	9,983.9174	10,067.0465	9,334.4339	9,685.3233	10,398.1255	10,308.6058	10,557.1413	10,570.9341	10,272.8725	10,434.5511	9,884.2795	10,041.2717	10,238.8433	10,070.4015	10,000
M S C I All Country World Net Total Return U S D Index 25 [Member]
Account Value [Line Items]
Account Value	24,525.7216	23,968.8998	23,375.2263	23,004.2603	22,503.0355	21,624.7737	22,362.6052	21,681.8618	20,789.7007	20,668.5483	19,721.2696	18,054.8514		18,614.5489	19,417.4566	19,975.663	19,270.2098	18,212.749		18,409.9478	18,149.1107	17,606.2413	18,125.7322	16,913.4626	17,606.2413	16,338.9605	15,409.0425	17,040.3131	17,691.6605	16,536.8516	18,059.165	18,038.0232	19,607.4662	19,191.767	19,700.6071		20,718.1276	19,921.2376	20,412.8235	19,421.4506	20,258.3342	19,763.6596	19,628.3949	19,373.0962	19,076.2595	18,277.1328	17,801.6296	17,398.658	17,478.1127	16,702.6307	14,869.7412	15,240.2279	15,748.003	14,839.706	14,094.3125	13,657.8975	13,088.6676	11,822.1855	13,667.3235	14,868.2501	15,034.2955	14,522.8991	14,176.8026	13,799.1266	13,514.8046	13,843.1675	13,802.7479	12,954.468	13,771.3814	13,321.5465		13,156.1402	12,813.3987	11,875.5991	12,775.5352	12,591.3835	13,611.407	13,552.4017	13,446.7994	13,053.1473	13,124.1879	13,107.839	12,983.8641	13,267.8667	13,849.5047	13,109.9159	12,901.9065	12,656.8857	12,399.4036	12,164.3945	12,117.9572	11,788.5291	11,735.1688	11,481.6274		11,305.4106	11,168.8146	10,864.043	10,574.8749	10,351.2621	10,273.192	10,450.5805	10,386.9422	10,352.1142	9,924.4328	9,984.8759	9,972.308	9,827.2446	9,149.2172	9,212.5892	9,803.8662	9,983.9174	10,067.0465	9,334.4339	9,685.3233	10,398.1255	10,308.6058	10,557.1413	10,570.9341	10,272.8725	10,434.5511	9,884.2795	10,041.2717	10,238.8433	10,070.4015	10,000
M S C I All Country World Net Total Return U S D Index 36 [Member]
Account Value [Line Items]
Account Value	24,525.7216	23,968.8998	23,375.2263	23,004.2603	22,503.0355	21,624.7737	22,362.6052	21,681.8618	20,789.7007	20,668.5483	19,721.2696	18,054.8514		18,614.5489	19,417.4566	19,975.663	19,270.2098	18,212.749		18,409.9478	18,149.1107	17,606.2413	18,125.7322	16,913.4626	17,606.2413	16,338.9605	15,409.0425	17,040.3131	17,691.6605	16,536.8516	18,059.165	18,038.0232	19,607.4662	19,191.767	19,700.6071		20,718.1276	19,921.2376	20,412.8235	19,421.4506	20,258.3342	19,763.6596	19,628.3949	19,373.0962	19,076.2595	18,277.1328	17,801.6296	17,398.658	17,478.1127	16,702.6307	14,869.7412	15,240.2279	15,748.003	14,839.706	14,094.3125	13,657.8975	13,088.6676	11,822.1855	13,667.3235	14,868.2501	15,034.2955	14,522.8991	14,176.8026	13,799.1266	13,514.8046	13,843.1675	13,802.7479	12,954.468	13,771.3814	13,321.5465		13,156.1402	12,813.3987	11,875.5991	12,775.5352	12,591.3835	13,611.407	13,552.4017	13,446.7994	13,053.1473	13,124.1879	13,107.839	12,983.8641	13,267.8667	13,849.5047	13,109.9159	12,901.9065	12,656.8857	12,399.4036	12,164.3945	12,117.9572	11,788.5291	11,735.1688	11,481.6274		11,305.4106	11,168.8146	10,864.043	10,574.8749	10,351.2621	10,273.192	10,450.5805	10,386.9422	10,352.1142	9,924.4328	9,984.8759	9,972.308	9,827.2446	9,149.2172	9,212.5892	9,803.8662	9,983.9174	10,067.0465	9,334.4339	9,685.3233	10,398.1255	10,308.6058	10,557.1413	10,570.9341	10,272.8725	10,434.5511	9,884.2795	10,041.2717	10,238.8433	10,070.4015	10,000
M S C I All Country World Net Total Return U S D Index 47 [Member]
Account Value [Line Items]
Account Value	24,525.7216	23,968.8998	23,375.2263	23,004.2603	22,503.0355	21,624.7737	22,362.6052	21,681.8618	20,789.7007	20,668.5483	19,721.2696	18,054.8514		18,614.5489	19,417.4566	19,975.663	19,270.2098	18,212.749		18,409.9478	18,149.1107	17,606.2413	18,125.7322	16,913.4626	17,606.2413	16,338.9605	15,409.0425	17,040.3131	17,691.6605	16,536.8516	18,059.165	18,038.0232	19,607.4662	19,191.767	19,700.6071		20,718.1276	19,921.2376	20,412.8235	19,421.4506	20,258.3342	19,763.6596	19,628.3949	19,373.0962	19,076.2595	18,277.1328	17,801.6296	17,398.658	17,478.1127	16,702.6307	14,869.7412	15,240.2279	15,748.003	14,839.706	14,094.3125	13,657.8975	13,088.6676	11,822.1855	13,667.3235	14,868.2501	15,034.2955	14,522.8991	14,176.8026	13,799.1266	13,514.8046	13,843.1675	13,802.7479	12,954.468	13,771.3814	13,321.5465		13,156.1402	12,813.3987	11,875.5991	12,775.5352	12,591.3835	13,611.407	13,552.4017	13,446.7994	13,053.1473	13,124.1879	13,107.839	12,983.8641	13,267.8667	13,849.5047	13,109.9159	12,901.9065	12,656.8857	12,399.4036	12,164.3945	12,117.9572	11,788.5291	11,735.1688	11,481.6274		11,305.4106	11,168.8146	10,864.043	10,574.8749	10,351.2621	10,273.192	10,450.5805	10,386.9422	10,352.1142	9,924.4328	9,984.8759	9,972.308	9,827.2446	9,149.2172	9,212.5892	9,803.8662	9,983.9174	10,067.0465	9,334.4339	9,685.3233	10,398.1255	10,308.6058	10,557.1413	10,570.9341	10,272.8725	10,434.5511	9,884.2795	10,041.2717	10,238.8433	10,070.4015	10,000
M S C I All Country World Net Total Return U S D Index 58 [Member]
Account Value [Line Items]
Account Value	24,525.7216	23,968.8998	23,375.2263	23,004.2603	22,503.0355	21,624.7737	22,362.6052	21,681.8618	20,789.7007	20,668.5483	19,721.2696	18,054.8514		18,614.5489	19,417.4566	19,975.663	19,270.2098	18,212.749		18,409.9478	18,149.1107	17,606.2413	18,125.7322	16,913.4626	17,606.2413	16,338.9605	15,409.0425	17,040.3131	17,691.6605	16,536.8516	18,059.165	18,038.0232	19,607.4662	19,191.767	19,700.6071		20,718.1276	19,921.2376	20,412.8235	19,421.4506	20,258.3342	19,763.6596	19,628.3949	19,373.0962	19,076.2595	18,277.1328	17,801.6296	17,398.658	17,478.1127	16,702.6307	14,869.7412	15,240.2279	15,748.003	14,839.706	14,094.3125	13,657.8975	13,088.6676	11,822.1855	13,667.3235	14,868.2501	15,034.2955	14,522.8991	14,176.8026	13,799.1266	13,514.8046	13,843.1675	13,802.7479	12,954.468	13,771.3814	13,321.5465		13,156.1402	12,813.3987	11,875.5991	12,775.5352	12,591.3835	13,611.407	13,552.4017	13,446.7994	13,053.1473	13,124.1879	13,107.839	12,983.8641	13,267.8667	13,849.5047	13,109.9159	12,901.9065	12,656.8857	12,399.4036	12,164.3945	12,117.9572	11,788.5291	11,735.1688	11,481.6274		11,305.4106	11,168.8146	10,864.043	10,574.8749	10,351.2621	10,273.192	10,450.5805	10,386.9422	10,352.1142	9,924.4328	9,984.8759	9,972.308	9,827.2446	9,149.2172	9,212.5892	9,803.8662	9,983.9174	10,067.0465	9,334.4339	9,685.3233	10,398.1255	10,308.6058	10,557.1413	10,570.9341	10,272.8725	10,434.5511	9,884.2795	10,041.2717	10,238.8433	10,070.4015	10,000
M S C I All Country World Net Total Return U S D Index 69 [Member]
Account Value [Line Items]
Account Value	21,753.5308	21,259.6476	20,733.0783	20,404.0433	19,959.4729	19,180.4827	19,834.9157	19,231.118	18,439.7997	18,332.3414	17,492.1355	16,014.0759		16,510.5097	17,222.6631	17,717.7743	17,092.0599	16,154.1259		16,329.035	16,097.6808	15,616.1731	16,076.9449	15,001.7004	15,616.1731	14,492.1355	13,667.3279	15,114.2128	15,691.9371	14,667.6586	16,017.9018	15,999.1498	17,391.1955	17,022.4836	17,473.8085		18,376.3167	17,669.5007	18,105.5217	17,226.2057	17,968.4946	17,529.7341	17,409.7586	17,183.3168	16,920.0321	16,211.2323	15,789.4762	15,432.0533	15,502.527	14,814.6994	13,188.9849	13,517.5948	13,967.9751	13,162.3447	12,501.2045	12,114.1184	11,609.2296	10,485.9005	12,122.4789	13,187.6624	13,334.9393	12,881.3471	12,574.3706	12,239.3841	11,987.1995	12,278.4469	12,242.596	11,490.1989	12,214.7749	11,815.7857		11,669.0756	11,365.0749	10,533.2767	11,331.4912	11,168.1546	12,072.8827	12,020.547	11,926.8811	11,577.7242	11,640.735	11,626.234	11,516.2723	11,768.1734	12,284.0678	11,628.0761	11,443.5785	11,226.2529	10,997.8745	10,789.4289	10,748.2405	10,456.0484	10,408.7195	10,183.8364	10,000
M S C I All Country Worldex U S A Net Total Return U S D Index 80 [Member]
Account Value [Line Items]
Account Value	16,630.2031	16,194.1448	15,745.6978	15,389.3378	15,404.0336	14,969.4799	15,243.1825	14,781.1433	14,416.1563	14,560.8069	13,864.2371	12,719.3207		13,266.6757	13,699.3735	14,347.342	13,786.846	13,194.8018		13,692.6526	13,458.8242	13,137.6739	13,615.6126	12,594.0806	12,688.9762	11,349.2529	11,019.9271	12,243.4383	12,650.3057	12,231.5513	13,382.8375	13,287.4905	14,177.7637	14,155.1934	14,441.0338		14,993.5549	14,398.5013	15,077.4162	14,725.9212	15,213.0386	14,929.2546	15,179.3838	15,278.3922	14,814.9987	14,391.329	14,211.6693	13,935.81	13,905.5658	13,192.4946	11,628.3222	11,883.8181	12,183.301	11,683.1931	11,184.5398	10,700.9334	10,361.8271	9,631.9034	11,262.6833	12,229.3444	12,566.946	12,045.3212	11,940.0432	11,537.4893	11,248.0376	11,606.5043	11,748.6972	11,081.4186	11,709.9264	11,408.5376		11,340.9771	11,123.6502	10,342.216	10,832.4932	10,730.9268	11,681.0364	11,628.0714	11,876.6458	11,599.2316	11,821.4237	12,100.8441	11,910.6517	12,124.5179	12,724.4868	12,053.1957	11,789.6748	11,694.6789	11,478.7062	11,269.5045	11,210.8719	10,812.3304	10,778.8762	10,440.0708		10,221.2893	9,968.552	9,812.1147	9,476.419	9,240.0327	9,458.8142	9,596.794	9,479.93	9,420.3444	8,976.4115	9,115.896	9,272.3835	9,034.6429	8,355.2767	8,451.8776	9,068.7492	9,242.8415	9,437.6483	8,783.7614	9,210.8418	9,973.1163	10,000.9028	10,287.947	10,451.1052	9,948.5397	10,111.9989	9,598.8003	9,613.0446	9,972.6147	9,900.9916	10,000
M S C I E A F E Net Total Return U S D Index 81 [Member]
Account Value [Line Items]
Account Value	17,418.6872	17,259.3077	16,715.7754	16,239.3678	16,505.8361	15,890.3251	16,307.952	15,788.6688	15,504.8593	15,416.1415	14,638.4169	13,395.1119		13,961.1207	14,454.8655	15,030.7292	14,559.6312	13,925.87		14,541.2266	14,141.9588	13,799.9409	14,094.035	13,038.2364	13,027.7676	11,708.923	11,111.4106	12,258.1214	12,869.3466	12,258.5056	13,512.2774	13,411.7322	14,339.4171	14,247.8395	14,504.2965		15,240.7933	14,498.4184	15,206.1705	14,841.1473	15,284.7244	15,019.785	14,907.5391	15,077.2152	14,601.061	14,174.5556	13,855.9629	13,552	13,697.936	13,089.3349	11,332.6268	11,803.9447	12,118.8319	11,526.2569	11,263.7119	10,892.8165	10,438.2833	9,804.8628	11,315.0659	12,439.5754	12,704.9525	12,305.043	12,167.8726	11,745.855	11,418.6413	11,722.319	11,873.0695	11,208.1415	11,773.5779	11,451.6124		11,379.8535	11,096.9768	10,412.6559	10,943.915	10,957.723	11,905.29	11,802.8554	12,035.2871	11,746.1521	11,891.4326	12,164.8742	11,893.318	12,111.613	12,684.1237	12,078.2834	11,887.4756	11,764.0795	11,588.1173	11,306.7993	11,311.0613	10,993.9322	11,013.4103	10,623.4864		10,359.8799	10,082.3268	9,940.1874	9,659.9725	9,340.5777	9,530.3854	9,729.3984	9,611.3298	9,604.511	9,141.226	9,458.7334	9,545.445	9,276.8694	8,710.1239	8,872.6782	9,564.3111	9,694.9419	9,848.1483	9,134.1379	9,622.7394	10,386.8244	10,175.5462	10,472.2625	10,526.1436	10,113.2303	10,269.2311	9,689.957	9,642.8195	9,988.8459	9,854.8027	10,000
M S C I All Country Worldex U S A Net Total Return U S D Index 94 [Member]
Account Value [Line Items]
Account Value	16,630.2031	16,194.1448	15,745.6978	15,389.3378	15,404.0336	14,969.4799	15,243.1825	14,781.1433	14,416.1563	14,560.8069	13,864.2371	12,719.3207		13,266.6757	13,699.3735	14,347.342	13,786.846	13,194.8018		13,692.6526	13,458.8242	13,137.6739	13,615.6126	12,594.0806	12,688.9762	11,349.2529	11,019.9271	12,243.4383	12,650.3057	12,231.5513	13,382.8375	13,287.4905	14,177.7637	14,155.1934	14,441.0338		14,993.5549	14,398.5013	15,077.4162	14,725.9212	15,213.0386	14,929.2546	15,179.3838	15,278.3922	14,814.9987	14,391.329	14,211.6693	13,935.81	13,905.5658	13,192.4946	11,628.3222	11,883.8181	12,183.301	11,683.1931	11,184.5398	10,700.9334	10,361.8271	9,631.9034	11,262.6833	12,229.3444	12,566.946	12,045.3212	11,940.0432	11,537.4893	11,248.0376	11,606.5043	11,748.6972	11,081.4186	11,709.9264	11,408.5376		11,340.9771	11,123.6502	10,342.216	10,832.4932	10,730.9268	11,681.0364	11,628.0714	11,876.6458	11,599.2316	11,821.4237	12,100.8441	11,910.6517	12,124.5179	12,724.4868	12,053.1957	11,789.6748	11,694.6789	11,478.7062	11,269.5045	11,210.8719	10,812.3304	10,778.8762	10,440.0708		10,221.2893	9,968.552	9,812.1147	9,476.419	9,240.0327	9,458.8142	9,596.794	9,479.93	9,420.3444	8,976.4115	9,115.896	9,272.3835	9,034.6429	8,355.2767	8,451.8776	9,068.7492	9,242.8415	9,437.6483	8,783.7614	9,210.8418	9,973.1163	10,000.9028	10,287.947	10,451.1052	9,948.5397	10,111.9989	9,598.8003	9,613.0446	9,972.6147	9,900.9916	10,000
M S C I E A F E Net Total Return U S D Index 95 [Member]
Account Value [Line Items]
Account Value	17,418.6872	17,259.3077	16,715.7754	16,239.3678	16,505.8361	15,890.3251	16,307.952	15,788.6688	15,504.8593	15,416.1415	14,638.4169	13,395.1119		13,961.1207	14,454.8655	15,030.7292	14,559.6312	13,925.87		14,541.2266	14,141.9588	13,799.9409	14,094.035	13,038.2364	13,027.7676	11,708.923	11,111.4106	12,258.1214	12,869.3466	12,258.5056	13,512.2774	13,411.7322	14,339.4171	14,247.8395	14,504.2965		15,240.7933	14,498.4184	15,206.1705	14,841.1473	15,284.7244	15,019.785	14,907.5391	15,077.2152	14,601.061	14,174.5556	13,855.9629	13,552	13,697.936	13,089.3349	11,332.6268	11,803.9447	12,118.8319	11,526.2569	11,263.7119	10,892.8165	10,438.2833	9,804.8628	11,315.0659	12,439.5754	12,704.9525	12,305.043	12,167.8726	11,745.855	11,418.6413	11,722.319	11,873.0695	11,208.1415	11,773.5779	11,451.6124		11,379.8535	11,096.9768	10,412.6559	10,943.915	10,957.723	11,905.29	11,802.8554	12,035.2871	11,746.1521	11,891.4326	12,164.8742	11,893.318	12,111.613	12,684.1237	12,078.2834	11,887.4756	11,764.0795	11,588.1173	11,306.7993	11,311.0613	10,993.9322	11,013.4103	10,623.4864		10,359.8799	10,082.3268	9,940.1874	9,659.9725	9,340.5777	9,530.3854	9,729.3984	9,611.3298	9,604.511	9,141.226	9,458.7334	9,545.445	9,276.8694	8,710.1239	8,872.6782	9,564.3111	9,694.9419	9,848.1483	9,134.1379	9,622.7394	10,386.8244	10,175.5462	10,472.2625	10,526.1436	10,113.2303	10,269.2311	9,689.957	9,642.8195	9,988.8459	9,854.8027	10,000
M S C I All Country Worldex U S A Net Total Return U S D Index 108 [Member]
Account Value [Line Items]
Account Value	16,630.2031	16,194.1448	15,745.6978	15,389.3378	15,404.0336	14,969.4799	15,243.1825	14,781.1433	14,416.1563	14,560.8069	13,864.2371	12,719.3207		13,266.6757	13,699.3735	14,347.342	13,786.846	13,194.8018		13,692.6526	13,458.8242	13,137.6739	13,615.6126	12,594.0806	12,688.9762	11,349.2529	11,019.9271	12,243.4383	12,650.3057	12,231.5513	13,382.8375	13,287.4905	14,177.7637	14,155.1934	14,441.0338		14,993.5549	14,398.5013	15,077.4162	14,725.9212	15,213.0386	14,929.2546	15,179.3838	15,278.3922	14,814.9987	14,391.329	14,211.6693	13,935.81	13,905.5658	13,192.4946	11,628.3222	11,883.8181	12,183.301	11,683.1931	11,184.5398	10,700.9334	10,361.8271	9,631.9034	11,262.6833	12,229.3444	12,566.946	12,045.3212	11,940.0432	11,537.4893	11,248.0376	11,606.5043	11,748.6972	11,081.4186	11,709.9264	11,408.5376		11,340.9771	11,123.6502	10,342.216	10,832.4932	10,730.9268	11,681.0364	11,628.0714	11,876.6458	11,599.2316	11,821.4237	12,100.8441	11,910.6517	12,124.5179	12,724.4868	12,053.1957	11,789.6748	11,694.6789	11,478.7062	11,269.5045	11,210.8719	10,812.3304	10,778.8762	10,440.0708		10,221.2893	9,968.552	9,812.1147	9,476.419	9,240.0327	9,458.8142	9,596.794	9,479.93	9,420.3444	8,976.4115	9,115.896	9,272.3835	9,034.6429	8,355.2767	8,451.8776	9,068.7492	9,242.8415	9,437.6483	8,783.7614	9,210.8418	9,973.1163	10,000.9028	10,287.947	10,451.1052	9,948.5397	10,111.9989	9,598.8003	9,613.0446	9,972.6147	9,900.9916	10,000
M S C I E A F E Net Total Return U S D Index 109 [Member]
Account Value [Line Items]
Account Value	17,418.6872	17,259.3077	16,715.7754	16,239.3678	16,505.8361	15,890.3251	16,307.952	15,788.6688	15,504.8593	15,416.1415	14,638.4169	13,395.1119		13,961.1207	14,454.8655	15,030.7292	14,559.6312	13,925.87		14,541.2266	14,141.9588	13,799.9409	14,094.035	13,038.2364	13,027.7676	11,708.923	11,111.4106	12,258.1214	12,869.3466	12,258.5056	13,512.2774	13,411.7322	14,339.4171	14,247.8395	14,504.2965		15,240.7933	14,498.4184	15,206.1705	14,841.1473	15,284.7244	15,019.785	14,907.5391	15,077.2152	14,601.061	14,174.5556	13,855.9629	13,552	13,697.936	13,089.3349	11,332.6268	11,803.9447	12,118.8319	11,526.2569	11,263.7119	10,892.8165	10,438.2833	9,804.8628	11,315.0659	12,439.5754	12,704.9525	12,305.043	12,167.8726	11,745.855	11,418.6413	11,722.319	11,873.0695	11,208.1415	11,773.5779	11,451.6124		11,379.8535	11,096.9768	10,412.6559	10,943.915	10,957.723	11,905.29	11,802.8554	12,035.2871	11,746.1521	11,891.4326	12,164.8742	11,893.318	12,111.613	12,684.1237	12,078.2834	11,887.4756	11,764.0795	11,588.1173	11,306.7993	11,311.0613	10,993.9322	11,013.4103	10,623.4864		10,359.8799	10,082.3268	9,940.1874	9,659.9725	9,340.5777	9,530.3854	9,729.3984	9,611.3298	9,604.511	9,141.226	9,458.7334	9,545.445	9,276.8694	8,710.1239	8,872.6782	9,564.3111	9,694.9419	9,848.1483	9,134.1379	9,622.7394	10,386.8244	10,175.5462	10,472.2625	10,526.1436	10,113.2303	10,269.2311	9,689.957	9,642.8195	9,988.8459	9,854.8027	10,000
M S C I All Country Worldex U S A Net Total Return U S D Index 121 [Member]
Account Value [Line Items]
Account Value	16,630.2031	16,194.1448	15,745.6978	15,389.3378	15,404.0336	14,969.4799	15,243.1825	14,781.1433	14,416.1563	14,560.8069	13,864.2371	12,719.3207		13,266.6757	13,699.3735	14,347.342	13,786.846	13,194.8018		13,692.6526	13,458.8242	13,137.6739	13,615.6126	12,594.0806	12,688.9762	11,349.2529	11,019.9271	12,243.4383	12,650.3057	12,231.5513	13,382.8375	13,287.4905	14,177.7637	14,155.1934	14,441.0338		14,993.5549	14,398.5013	15,077.4162	14,725.9212	15,213.0386	14,929.2546	15,179.3838	15,278.3922	14,814.9987	14,391.329	14,211.6693	13,935.81	13,905.5658	13,192.4946	11,628.3222	11,883.8181	12,183.301	11,683.1931	11,184.5398	10,700.9334	10,361.8271	9,631.9034	11,262.6833	12,229.3444	12,566.946	12,045.3212	11,940.0432	11,537.4893	11,248.0376	11,606.5043	11,748.6972	11,081.4186	11,709.9264	11,408.5376		11,340.9771	11,123.6502	10,342.216	10,832.4932	10,730.9268	11,681.0364	11,628.0714	11,876.6458	11,599.2316	11,821.4237	12,100.8441	11,910.6517	12,124.5179	12,724.4868	12,053.1957	11,789.6748	11,694.6789	11,478.7062	11,269.5045	11,210.8719	10,812.3304	10,778.8762	10,440.0708		10,221.2893	9,968.552	9,812.1147	9,476.419	9,240.0327	9,458.8142	9,596.794	9,479.93	9,420.3444	8,976.4115	9,115.896	9,272.3835	9,034.6429	8,355.2767	8,451.8776	9,068.7492	9,242.8415	9,437.6483	8,783.7614	9,210.8418	9,973.1163	10,000.9028	10,287.947	10,451.1052	9,948.5397	10,111.9989	9,598.8003	9,613.0446	9,972.6147	9,900.9916	10,000
M S C I E A F E Net Total Return U S D Index 122 [Member]
Account Value [Line Items]
Account Value	17,418.6872	17,259.3077	16,715.7754	16,239.3678	16,505.8361	15,890.3251	16,307.952	15,788.6688	15,504.8593	15,416.1415	14,638.4169	13,395.1119		13,961.1207	14,454.8655	15,030.7292	14,559.6312	13,925.87		14,541.2266	14,141.9588	13,799.9409	14,094.035	13,038.2364	13,027.7676	11,708.923	11,111.4106	12,258.1214	12,869.3466	12,258.5056	13,512.2774	13,411.7322	14,339.4171	14,247.8395	14,504.2965		15,240.7933	14,498.4184	15,206.1705	14,841.1473	15,284.7244	15,019.785	14,907.5391	15,077.2152	14,601.061	14,174.5556	13,855.9629	13,552	13,697.936	13,089.3349	11,332.6268	11,803.9447	12,118.8319	11,526.2569	11,263.7119	10,892.8165	10,438.2833	9,804.8628	11,315.0659	12,439.5754	12,704.9525	12,305.043	12,167.8726	11,745.855	11,418.6413	11,722.319	11,873.0695	11,208.1415	11,773.5779	11,451.6124		11,379.8535	11,096.9768	10,412.6559	10,943.915	10,957.723	11,905.29	11,802.8554	12,035.2871	11,746.1521	11,891.4326	12,164.8742	11,893.318	12,111.613	12,684.1237	12,078.2834	11,887.4756	11,764.0795	11,588.1173	11,306.7993	11,311.0613	10,993.9322	11,013.4103	10,623.4864		10,359.8799	10,082.3268	9,940.1874	9,659.9725	9,340.5777	9,530.3854	9,729.3984	9,611.3298	9,604.511	9,141.226	9,458.7334	9,545.445	9,276.8694	8,710.1239	8,872.6782	9,564.3111	9,694.9419	9,848.1483	9,134.1379	9,622.7394	10,386.8244	10,175.5462	10,472.2625	10,526.1436	10,113.2303	10,269.2311	9,689.957	9,642.8195	9,988.8459	9,854.8027	10,000
M S C I All Country Worldex U S A Net Total Return U S D Index 134 [Member]
Account Value [Line Items]
Account Value	16,630.2031	16,194.1448	15,745.6978	15,389.3378	15,404.0336	14,969.4799	15,243.1825	14,781.1433	14,416.1563	14,560.8069	13,864.2371	12,719.3207		13,266.6757	13,699.3735	14,347.342	13,786.846	13,194.8018		13,692.6526	13,458.8242	13,137.6739	13,615.6126	12,594.0806	12,688.9762	11,349.2529	11,019.9271	12,243.4383	12,650.3057	12,231.5513	13,382.8375	13,287.4905	14,177.7637	14,155.1934	14,441.0338		14,993.5549	14,398.5013	15,077.4162	14,725.9212	15,213.0386	14,929.2546	15,179.3838	15,278.3922	14,814.9987	14,391.329	14,211.6693	13,935.81	13,905.5658	13,192.4946	11,628.3222	11,883.8181	12,183.301	11,683.1931	11,184.5398	10,700.9334	10,361.8271	9,631.9034	11,262.6833	12,229.3444	12,566.946	12,045.3212	11,940.0432	11,537.4893	11,248.0376	11,606.5043	11,748.6972	11,081.4186	11,709.9264	11,408.5376		11,340.9771	11,123.6502	10,342.216	10,832.4932	10,730.9268	11,681.0364	11,628.0714	11,876.6458	11,599.2316	11,821.4237	12,100.8441	11,910.6517	12,124.5179	12,724.4868	12,053.1957	11,789.6748	11,694.6789	11,478.7062	11,269.5045	11,210.8719	10,812.3304	10,778.8762	10,440.0708		10,221.2893	9,968.552	9,812.1147	9,476.419	9,240.0327	9,458.8142	9,596.794	9,479.93	9,420.3444	8,976.4115	9,115.896	9,272.3835	9,034.6429	8,355.2767	8,451.8776	9,068.7492	9,242.8415	9,437.6483	8,783.7614	9,210.8418	9,973.1163	10,000.9028	10,287.947	10,451.1052	9,948.5397	10,111.9989	9,598.8003	9,613.0446	9,972.6147	9,900.9916	10,000
M S C I E A F E Net Total Return U S D Index 135 [Member]
Account Value [Line Items]
Account Value	17,418.6872	17,259.3077	16,715.7754	16,239.3678	16,505.8361	15,890.3251	16,307.952	15,788.6688	15,504.8593	15,416.1415	14,638.4169	13,395.1119		13,961.1207	14,454.8655	15,030.7292	14,559.6312	13,925.87		14,541.2266	14,141.9588	13,799.9409	14,094.035	13,038.2364	13,027.7676	11,708.923	11,111.4106	12,258.1214	12,869.3466	12,258.5056	13,512.2774	13,411.7322	14,339.4171	14,247.8395	14,504.2965		15,240.7933	14,498.4184	15,206.1705	14,841.1473	15,284.7244	15,019.785	14,907.5391	15,077.2152	14,601.061	14,174.5556	13,855.9629	13,552	13,697.936	13,089.3349	11,332.6268	11,803.9447	12,118.8319	11,526.2569	11,263.7119	10,892.8165	10,438.2833	9,804.8628	11,315.0659	12,439.5754	12,704.9525	12,305.043	12,167.8726	11,745.855	11,418.6413	11,722.319	11,873.0695	11,208.1415	11,773.5779	11,451.6124		11,379.8535	11,096.9768	10,412.6559	10,943.915	10,957.723	11,905.29	11,802.8554	12,035.2871	11,746.1521	11,891.4326	12,164.8742	11,893.318	12,111.613	12,684.1237	12,078.2834	11,887.4756	11,764.0795	11,588.1173	11,306.7993	11,311.0613	10,993.9322	11,013.4103	10,623.4864		10,359.8799	10,082.3268	9,940.1874	9,659.9725	9,340.5777	9,530.3854	9,729.3984	9,611.3298	9,604.511	9,141.226	9,458.7334	9,545.445	9,276.8694	8,710.1239	8,872.6782	9,564.3111	9,694.9419	9,848.1483	9,134.1379	9,622.7394	10,386.8244	10,175.5462	10,472.2625	10,526.1436	10,113.2303	10,269.2311	9,689.957	9,642.8195	9,988.8459	9,854.8027	10,000
M S C I All Country Worldex U S A Net Total Return U S D Index 147 [Member]
Account Value [Line Items]
Account Value	16,630.2031	16,194.1448	15,745.6978	15,389.3378	15,404.0336	14,969.4799	15,243.1825	14,781.1433	14,416.1563	14,560.8069	13,864.2371	12,719.3207		13,266.6757	13,699.3735	14,347.342	13,786.846	13,194.8018		13,692.6526	13,458.8242	13,137.6739	13,615.6126	12,594.0806	12,688.9762	11,349.2529	11,019.9271	12,243.4383	12,650.3057	12,231.5513	13,382.8375	13,287.4905	14,177.7637	14,155.1934	14,441.0338		14,993.5549	14,398.5013	15,077.4162	14,725.9212	15,213.0386	14,929.2546	15,179.3838	15,278.3922	14,814.9987	14,391.329	14,211.6693	13,935.81	13,905.5658	13,192.4946	11,628.3222	11,883.8181	12,183.301	11,683.1931	11,184.5398	10,700.9334	10,361.8271	9,631.9034	11,262.6833	12,229.3444	12,566.946	12,045.3212	11,940.0432	11,537.4893	11,248.0376	11,606.5043	11,748.6972	11,081.4186	11,709.9264	11,408.5376		11,340.9771	11,123.6502	10,342.216	10,832.4932	10,730.9268	11,681.0364	11,628.0714	11,876.6458	11,599.2316	11,821.4237	12,100.8441	11,910.6517	12,124.5179	12,724.4868	12,053.1957	11,789.6748	11,694.6789	11,478.7062	11,269.5045	11,210.8719	10,812.3304	10,778.8762	10,440.0708		10,221.2893	9,968.552	9,812.1147	9,476.419	9,240.0327	9,458.8142	9,596.794	9,479.93	9,420.3444	8,976.4115	9,115.896	9,272.3835	9,034.6429	8,355.2767	8,451.8776	9,068.7492	9,242.8415	9,437.6483	8,783.7614	9,210.8418	9,973.1163	10,000.9028	10,287.947	10,451.1052	9,948.5397	10,111.9989	9,598.8003	9,613.0446	9,972.6147	9,900.9916	10,000
M S C I E A F E Net Total Return U S D Index 148 [Member]
Account Value [Line Items]
Account Value	17,418.6872	17,259.3077	16,715.7754	16,239.3678	16,505.8361	15,890.3251	16,307.952	15,788.6688	15,504.8593	15,416.1415	14,638.4169	13,395.1119		13,961.1207	14,454.8655	15,030.7292	14,559.6312	13,925.87		14,541.2266	14,141.9588	13,799.9409	14,094.035	13,038.2364	13,027.7676	11,708.923	11,111.4106	12,258.1214	12,869.3466	12,258.5056	13,512.2774	13,411.7322	14,339.4171	14,247.8395	14,504.2965		15,240.7933	14,498.4184	15,206.1705	14,841.1473	15,284.7244	15,019.785	14,907.5391	15,077.2152	14,601.061	14,174.5556	13,855.9629	13,552	13,697.936	13,089.3349	11,332.6268	11,803.9447	12,118.8319	11,526.2569	11,263.7119	10,892.8165	10,438.2833	9,804.8628	11,315.0659	12,439.5754	12,704.9525	12,305.043	12,167.8726	11,745.855	11,418.6413	11,722.319	11,873.0695	11,208.1415	11,773.5779	11,451.6124		11,379.8535	11,096.9768	10,412.6559	10,943.915	10,957.723	11,905.29	11,802.8554	12,035.2871	11,746.1521	11,891.4326	12,164.8742	11,893.318	12,111.613	12,684.1237	12,078.2834	11,887.4756	11,764.0795	11,588.1173	11,306.7993	11,311.0613	10,993.9322	11,013.4103	10,623.4864		10,359.8799	10,082.3268	9,940.1874	9,659.9725	9,340.5777	9,530.3854	9,729.3984	9,611.3298	9,604.511	9,141.226	9,458.7334	9,545.445	9,276.8694	8,710.1239	8,872.6782	9,564.3111	9,694.9419	9,848.1483	9,134.1379	9,622.7394	10,386.8244	10,175.5462	10,472.2625	10,526.1436	10,113.2303	10,269.2311	9,689.957	9,642.8195	9,988.8459	9,854.8027	10,000
M S C I All Country Worldex U S A Net Total Return U S D Index 160 [Member]
Account Value [Line Items]
Account Value	16,630.2031	16,194.1448	15,745.6978	15,389.3378	15,404.0336	14,969.4799	15,243.1825	14,781.1433	14,416.1563	14,560.8069	13,864.2371	12,719.3207		13,266.6757	13,699.3735	14,347.342	13,786.846	13,194.8018		13,692.6526	13,458.8242	13,137.6739	13,615.6126	12,594.0806	12,688.9762	11,349.2529	11,019.9271	12,243.4383	12,650.3057	12,231.5513	13,382.8375	13,287.4905	14,177.7637	14,155.1934	14,441.0338		14,993.5549	14,398.5013	15,077.4162	14,725.9212	15,213.0386	14,929.2546	15,179.3838	15,278.3922	14,814.9987	14,391.329	14,211.6693	13,935.81	13,905.5658	13,192.4946	11,628.3222	11,883.8181	12,183.301	11,683.1931	11,184.5398	10,700.9334	10,361.8271	9,631.9034	11,262.6833	12,229.3444	12,566.946	12,045.3212	11,940.0432	11,537.4893	11,248.0376	11,606.5043	11,748.6972	11,081.4186	11,709.9264	11,408.5376		11,340.9771	11,123.6502	10,342.216	10,832.4932	10,730.9268	11,681.0364	11,628.0714	11,876.6458	11,599.2316	11,821.4237	12,100.8441	11,910.6517	12,124.5179	12,724.4868	12,053.1957	11,789.6748	11,694.6789	11,478.7062	11,269.5045	11,210.8719	10,812.3304	10,778.8762	10,440.0708		10,221.2893	9,968.552	9,812.1147	9,476.419	9,240.0327	9,458.8142	9,596.794	9,479.93	9,420.3444	8,976.4115	9,115.896	9,272.3835	9,034.6429	8,355.2767	8,451.8776	9,068.7492	9,242.8415	9,437.6483	8,783.7614	9,210.8418	9,973.1163	10,000.9028	10,287.947	10,451.1052	9,948.5397	10,111.9989	9,598.8003	9,613.0446	9,972.6147	9,900.9916	10,000
M S C I E A F E Net Total Return U S D Index 161 [Member]
Account Value [Line Items]
Account Value	17,418.6872	17,259.3077	16,715.7754	16,239.3678	16,505.8361	15,890.3251	16,307.952	15,788.6688	15,504.8593	15,416.1415	14,638.4169	13,395.1119		13,961.1207	14,454.8655	15,030.7292	14,559.6312	13,925.87		14,541.2266	14,141.9588	13,799.9409	14,094.035	13,038.2364	13,027.7676	11,708.923	11,111.4106	12,258.1214	12,869.3466	12,258.5056	13,512.2774	13,411.7322	14,339.4171	14,247.8395	14,504.2965		15,240.7933	14,498.4184	15,206.1705	14,841.1473	15,284.7244	15,019.785	14,907.5391	15,077.2152	14,601.061	14,174.5556	13,855.9629	13,552	13,697.936	13,089.3349	11,332.6268	11,803.9447	12,118.8319	11,526.2569	11,263.7119	10,892.8165	10,438.2833	9,804.8628	11,315.0659	12,439.5754	12,704.9525	12,305.043	12,167.8726	11,745.855	11,418.6413	11,722.319	11,873.0695	11,208.1415	11,773.5779	11,451.6124		11,379.8535	11,096.9768	10,412.6559	10,943.915	10,957.723	11,905.29	11,802.8554	12,035.2871	11,746.1521	11,891.4326	12,164.8742	11,893.318	12,111.613	12,684.1237	12,078.2834	11,887.4756	11,764.0795	11,588.1173	11,306.7993	11,311.0613	10,993.9322	11,013.4103	10,623.4864		10,359.8799	10,082.3268	9,940.1874	9,659.9725	9,340.5777	9,530.3854	9,729.3984	9,611.3298	9,604.511	9,141.226	9,458.7334	9,545.445	9,276.8694	8,710.1239	8,872.6782	9,564.3111	9,694.9419	9,848.1483	9,134.1379	9,622.7394	10,386.8244	10,175.5462	10,472.2625	10,526.1436	10,113.2303	10,269.2311	9,689.957	9,642.8195	9,988.8459	9,854.8027	10,000
M S C I All Country Worldex U S A Net Total Return U S D Index 173 [Member]
Account Value [Line Items]
Account Value	18,932.8948	18,436.4579	17,925.917	17,520.2138	17,536.9444	17,042.2205	17,353.8212	16,827.8059	16,412.2813	16,576.9609	15,783.9409	14,480.4943		15,103.6385	15,596.2496	16,333.9386	15,695.8339	15,021.8126		15,588.5981	15,322.3928	14,956.7745	15,500.8908	14,337.9128	14,445.9481	12,920.7208	12,545.7951	13,938.7191	14,401.9232	13,925.1861	15,235.8846	15,127.3354	16,140.8798	16,115.1843	16,440.6034		17,069.6291	16,392.1817	17,165.1021	16,764.9376	17,319.5034	16,996.4255	17,281.1886	17,393.9062	16,866.3492	16,384.0163	16,179.4802	15,865.4241	15,830.9922	15,019.186	13,238.4313	13,529.3043	13,870.2549	13,300.8999	12,733.2009	12,182.6321	11,796.5717	10,965.5795	12,822.1644	13,922.6737	14,307.0212	13,713.1698	13,593.3146	13,135.0212	12,805.4908	13,213.5923	13,375.4739	12,615.801	13,331.3348	12,988.2143		12,911.2992	12,663.8801	11,774.2451	12,332.4083	12,216.7786	13,298.4446	13,238.1458	13,521.1388	13,205.3127	13,458.2705	13,776.3807	13,559.8534	13,803.3324	14,486.3757	13,722.1347	13,422.1255	13,313.9761	13,068.0988	12,829.9301	12,763.1789	12,309.4537	12,271.3672	11,885.6494		11,636.5744	11,348.842	11,170.7437	10,788.5661	10,519.4486	10,768.5236	10,925.6087	10,792.5632	10,724.7271	10,219.3253	10,378.1234	10,556.2788	10,285.6197	9,512.1854	9,622.1621	10,324.4484	10,522.6463	10,744.4269	10,000
M S C I All Country Worldex U S A Net Total Return U S D Index 185 [Member]
Account Value [Line Items]
Account Value	18,932.8948	18,436.4579	17,925.917	17,520.2138	17,536.9444	17,042.2205	17,353.8212	16,827.8059	16,412.2813	16,576.9609	15,783.9409	14,480.4943		15,103.6385	15,596.2496	16,333.9386	15,695.8339	15,021.8126		15,588.5981	15,322.3928	14,956.7745	15,500.8908	14,337.9128	14,445.9481	12,920.7208	12,545.7951	13,938.7191	14,401.9232	13,925.1861	15,235.8846	15,127.3354	16,140.8798	16,115.1843	16,440.6034		17,069.6291	16,392.1817	17,165.1021	16,764.9376	17,319.5034	16,996.4255	17,281.1886	17,393.9062	16,866.3492	16,384.0163	16,179.4802	15,865.4241	15,830.9922	15,019.186	13,238.4313	13,529.3043	13,870.2549	13,300.8999	12,733.2009	12,182.6321	11,796.5717	10,965.5795	12,822.1644	13,922.6737	14,307.0212	13,713.1698	13,593.3146	13,135.0212	12,805.4908	13,213.5923	13,375.4739	12,615.801	13,331.3348	12,988.2143		12,911.2992	12,663.8801	11,774.2451	12,332.4083	12,216.7786	13,298.4446	13,238.1458	13,521.1388	13,205.3127	13,458.2705	13,776.3807	13,559.8534	13,803.3324	14,486.3757	13,722.1347	13,422.1255	13,313.9761	13,068.0988	12,829.9301	12,763.1789	12,309.4537	12,271.3672	11,885.6494		11,636.5744	11,348.842	11,170.7437	10,788.5661	10,519.4486	10,768.5236	10,925.6087	10,792.5632	10,724.7271	10,219.3253	10,378.1234	10,556.2788	10,285.6197	9,512.1854	9,622.1621	10,324.4484	10,522.6463	10,744.4269	10,000
M S C I All Country Worldex U S A Net Total Return U S D Index 197 [Member]
Account Value [Line Items]
Account Value	18,932.8948	18,436.4579	17,925.917	17,520.2138	17,536.9444	17,042.2205	17,353.8212	16,827.8059	16,412.2813	16,576.9609	15,783.9409	14,480.4943		15,103.6385	15,596.2496	16,333.9386	15,695.8339	15,021.8126		15,588.5981	15,322.3928	14,956.7745	15,500.8908	14,337.9128	14,445.9481	12,920.7208	12,545.7951	13,938.7191	14,401.9232	13,925.1861	15,235.8846	15,127.3354	16,140.8798	16,115.1843	16,440.6034		17,069.6291	16,392.1817	17,165.1021	16,764.9376	17,319.5034	16,996.4255	17,281.1886	17,393.9062	16,866.3492	16,384.0163	16,179.4802	15,865.4241	15,830.9922	15,019.186	13,238.4313	13,529.3043	13,870.2549	13,300.8999	12,733.2009	12,182.6321	11,796.5717	10,965.5795	12,822.1644	13,922.6737	14,307.0212	13,713.1698	13,593.3146	13,135.0212	12,805.4908	13,213.5923	13,375.4739	12,615.801	13,331.3348	12,988.2143		12,911.2992	12,663.8801	11,774.2451	12,332.4083	12,216.7786	13,298.4446	13,238.1458	13,521.1388	13,205.3127	13,458.2705	13,776.3807	13,559.8534	13,803.3324	14,486.3757	13,722.1347	13,422.1255	13,313.9761	13,068.0988	12,829.9301	12,763.1789	12,309.4537	12,271.3672	11,885.6494		11,636.5744	11,348.842	11,170.7437	10,788.5661	10,519.4486	10,768.5236	10,925.6087	10,792.5632	10,724.7271	10,219.3253	10,378.1234	10,556.2788	10,285.6197	9,512.1854	9,622.1621	10,324.4484	10,522.6463	10,744.4269	10,000
M S C I All Country Worldex U S A Growth Net Total Return U S D Index 208 [Member]
Account Value [Line Items]
Account Value	17,859.1088	17,416.4288	16,879.5388	16,703.2129	16,549.4928	16,124.502	16,583.1756	16,132.1315	15,538.1051	15,657.7468	14,943.2875	13,541.835		14,090.1975	14,875.1307	15,674.4751	15,200.8251	14,644.7201		15,061.7989	14,910.9045	14,254.9945	14,892.6503	13,731.1594	13,943.9939	12,402.2719	12,163.3841	13,607.2226	14,159.4846	13,420.7805	14,610.9243	14,737.5738	15,922.2922	15,947.6674	16,406.3975		17,845.2061	17,323.236	17,972.3643	17,432.253	18,215.1516	17,812.7102	18,087.4848	18,018.1412	17,593.433	16,967.4193	17,021.1648	17,083.2179	16,980.1916	16,132.5836	14,643.7028	14,905.253	15,037.215	14,447.8793	13,530.5886	12,877.1087	12,340.2187	11,360.0271	12,757.4105	13,761.7904	13,895.2782	13,342.0554	13,141.5977	12,680.5505	12,531.5211	12,762.3273	12,789.0587	11,992.9922	12,641.2727	12,255.4466		12,059.2274	11,741.9537	10,911.9218	11,435.2482	11,264.5737	12,428.0991	12,531.6341	12,674.4469	12,460.4821	12,662.8048	12,735.1437	12,640.3685	12,815.5642	13,415.7507	12,751.4199	12,482.0707	12,346.2093	12,056.2887	11,848.5405	11,730.9333	11,338.0994	11,329.4527	10,847.2124		10,540.733	10,250.3038	10,048.094	9,659.2161	9,519.9073	9,896.9171	10,245.1609	10,088.1065	10,124.0498	9,659.3857	9,697.5896	9,760.6601	9,614.8521	8,938.3707	9,052.0218	9,647.1785	9,773.3194	9,884.1448	9,188.0528	9,548.6733	10,324.4511	10,297.4371	10,573.2855	10,688.4625	10,237.4749	10,348.0743	9,843.0021	9,769.5894	10,111.108	9,965.2434	10,000
M S C I All Country Worldex U S A Net Total Return U S D Index 209 [Member]
Account Value [Line Items]
Account Value	16,630.2031	16,194.1448	15,745.6978	15,389.3378	15,404.0336	14,969.4799	15,243.1825	14,781.1433	14,416.1563	14,560.8069	13,864.2371	12,719.3207		13,266.6757	13,699.3735	14,347.342	13,786.846	13,194.8018		13,692.6526	13,458.8242	13,137.6739	13,615.6126	12,594.0806	12,688.9762	11,349.2529	11,019.9271	12,243.4383	12,650.3057	12,231.5513	13,382.8375	13,287.4905	14,177.7637	14,155.1934	14,441.0338		14,993.5549	14,398.5013	15,077.4162	14,725.9212	15,213.0386	14,929.2546	15,179.3838	15,278.3922	14,814.9987	14,391.329	14,211.6693	13,935.81	13,905.5658	13,192.4946	11,628.3222	11,883.8181	12,183.301	11,683.1931	11,184.5398	10,700.9334	10,361.8271	9,631.9034	11,262.6833	12,229.3444	12,566.946	12,045.3212	11,940.0432	11,537.4893	11,248.0376	11,606.5043	11,748.6972	11,081.4186	11,709.9264	11,408.5376		11,340.9771	11,123.6502	10,342.216	10,832.4932	10,730.9268	11,681.0364	11,628.0714	11,876.6458	11,599.2316	11,821.4237	12,100.8441	11,910.6517	12,124.5179	12,724.4868	12,053.1957	11,789.6748	11,694.6789	11,478.7062	11,269.5045	11,210.8719	10,812.3304	10,778.8762	10,440.0708		10,221.2893	9,968.552	9,812.1147	9,476.419	9,240.0327	9,458.8142	9,596.794	9,479.93	9,420.3444	8,976.4115	9,115.896	9,272.3835	9,034.6429	8,355.2767	8,451.8776	9,068.7492	9,242.8415	9,437.6483	8,783.7614	9,210.8418	9,973.1163	10,000.9028	10,287.947	10,451.1052	9,948.5397	10,111.9989	9,598.8003	9,613.0446	9,972.6147	9,900.9916	10,000
M S C I All Country Worldex U S A Growth Net Total Return U S D Index 222 [Member]
Account Value [Line Items]
Account Value	17,859.1088	17,416.4288	16,879.5388	16,703.2129	16,549.4928	16,124.502	16,583.1756	16,132.1315	15,538.1051	15,657.7468	14,943.2875	13,541.835		14,090.1975	14,875.1307	15,674.4751	15,200.8251	14,644.7201		15,061.7989	14,910.9045	14,254.9945	14,892.6503	13,731.1594	13,943.9939	12,402.2719	12,163.3841	13,607.2226	14,159.4846	13,420.7805	14,610.9243	14,737.5738	15,922.2922	15,947.6674	16,406.3975		17,845.2061	17,323.236	17,972.3643	17,432.253	18,215.1516	17,812.7102	18,087.4848	18,018.1412	17,593.433	16,967.4193	17,021.1648	17,083.2179	16,980.1916	16,132.5836	14,643.7028	14,905.253	15,037.215	14,447.8793	13,530.5886	12,877.1087	12,340.2187	11,360.0271	12,757.4105	13,761.7904	13,895.2782	13,342.0554	13,141.5977	12,680.5505	12,531.5211	12,762.3273	12,789.0587	11,992.9922	12,641.2727	12,255.4466		12,059.2274	11,741.9537	10,911.9218	11,435.2482	11,264.5737	12,428.0991	12,531.6341	12,674.4469	12,460.4821	12,662.8048	12,735.1437	12,640.3685	12,815.5642	13,415.7507	12,751.4199	12,482.0707	12,346.2093	12,056.2887	11,848.5405	11,730.9333	11,338.0994	11,329.4527	10,847.2124		10,540.733	10,250.3038	10,048.094	9,659.2161	9,519.9073	9,896.9171	10,245.1609	10,088.1065	10,124.0498	9,659.3857	9,697.5896	9,760.6601	9,614.8521	8,938.3707	9,052.0218	9,647.1785	9,773.3194	9,884.1448	9,188.0528	9,548.6733	10,324.4511	10,297.4371	10,573.2855	10,688.4625	10,237.4749	10,348.0743	9,843.0021	9,769.5894	10,111.108	9,965.2434	10,000
M S C I All Country Worldex U S A Net Total Return U S D Index 223 [Member]
Account Value [Line Items]
Account Value	16,630.2031	16,194.1448	15,745.6978	15,389.3378	15,404.0336	14,969.4799	15,243.1825	14,781.1433	14,416.1563	14,560.8069	13,864.2371	12,719.3207		13,266.6757	13,699.3735	14,347.342	13,786.846	13,194.8018		13,692.6526	13,458.8242	13,137.6739	13,615.6126	12,594.0806	12,688.9762	11,349.2529	11,019.9271	12,243.4383	12,650.3057	12,231.5513	13,382.8375	13,287.4905	14,177.7637	14,155.1934	14,441.0338		14,993.5549	14,398.5013	15,077.4162	14,725.9212	15,213.0386	14,929.2546	15,179.3838	15,278.3922	14,814.9987	14,391.329	14,211.6693	13,935.81	13,905.5658	13,192.4946	11,628.3222	11,883.8181	12,183.301	11,683.1931	11,184.5398	10,700.9334	10,361.8271	9,631.9034	11,262.6833	12,229.3444	12,566.946	12,045.3212	11,940.0432	11,537.4893	11,248.0376	11,606.5043	11,748.6972	11,081.4186	11,709.9264	11,408.5376		11,340.9771	11,123.6502	10,342.216	10,832.4932	10,730.9268	11,681.0364	11,628.0714	11,876.6458	11,599.2316	11,821.4237	12,100.8441	11,910.6517	12,124.5179	12,724.4868	12,053.1957	11,789.6748	11,694.6789	11,478.7062	11,269.5045	11,210.8719	10,812.3304	10,778.8762	10,440.0708		10,221.2893	9,968.552	9,812.1147	9,476.419	9,240.0327	9,458.8142	9,596.794	9,479.93	9,420.3444	8,976.4115	9,115.896	9,272.3835	9,034.6429	8,355.2767	8,451.8776	9,068.7492	9,242.8415	9,437.6483	8,783.7614	9,210.8418	9,973.1163	10,000.9028	10,287.947	10,451.1052	9,948.5397	10,111.9989	9,598.8003	9,613.0446	9,972.6147	9,900.9916	10,000
M S C I All Country Worldex U S A Growth Net Total Return U S D Index 236 [Member]
Account Value [Line Items]
Account Value	17,859.1088	17,416.4288	16,879.5388	16,703.2129	16,549.4928	16,124.502	16,583.1756	16,132.1315	15,538.1051	15,657.7468	14,943.2875	13,541.835		14,090.1975	14,875.1307	15,674.4751	15,200.8251	14,644.7201		15,061.7989	14,910.9045	14,254.9945	14,892.6503	13,731.1594	13,943.9939	12,402.2719	12,163.3841	13,607.2226	14,159.4846	13,420.7805	14,610.9243	14,737.5738	15,922.2922	15,947.6674	16,406.3975		17,845.2061	17,323.236	17,972.3643	17,432.253	18,215.1516	17,812.7102	18,087.4848	18,018.1412	17,593.433	16,967.4193	17,021.1648	17,083.2179	16,980.1916	16,132.5836	14,643.7028	14,905.253	15,037.215	14,447.8793	13,530.5886	12,877.1087	12,340.2187	11,360.0271	12,757.4105	13,761.7904	13,895.2782	13,342.0554	13,141.5977	12,680.5505	12,531.5211	12,762.3273	12,789.0587	11,992.9922	12,641.2727	12,255.4466		12,059.2274	11,741.9537	10,911.9218	11,435.2482	11,264.5737	12,428.0991	12,531.6341	12,674.4469	12,460.4821	12,662.8048	12,735.1437	12,640.3685	12,815.5642	13,415.7507	12,751.4199	12,482.0707	12,346.2093	12,056.2887	11,848.5405	11,730.9333	11,338.0994	11,329.4527	10,847.2124		10,540.733	10,250.3038	10,048.094	9,659.2161	9,519.9073	9,896.9171	10,245.1609	10,088.1065	10,124.0498	9,659.3857	9,697.5896	9,760.6601	9,614.8521	8,938.3707	9,052.0218	9,647.1785	9,773.3194	9,884.1448	9,188.0528	9,548.6733	10,324.4511	10,297.4371	10,573.2855	10,688.4625	10,237.4749	10,348.0743	9,843.0021	9,769.5894	10,111.108	9,965.2434	10,000
M S C I All Country Worldex U S A Net Total Return U S D Index 237 [Member]
Account Value [Line Items]
Account Value	16,630.2031	16,194.1448	15,745.6978	15,389.3378	15,404.0336	14,969.4799	15,243.1825	14,781.1433	14,416.1563	14,560.8069	13,864.2371	12,719.3207		13,266.6757	13,699.3735	14,347.342	13,786.846	13,194.8018		13,692.6526	13,458.8242	13,137.6739	13,615.6126	12,594.0806	12,688.9762	11,349.2529	11,019.9271	12,243.4383	12,650.3057	12,231.5513	13,382.8375	13,287.4905	14,177.7637	14,155.1934	14,441.0338		14,993.5549	14,398.5013	15,077.4162	14,725.9212	15,213.0386	14,929.2546	15,179.3838	15,278.3922	14,814.9987	14,391.329	14,211.6693	13,935.81	13,905.5658	13,192.4946	11,628.3222	11,883.8181	12,183.301	11,683.1931	11,184.5398	10,700.9334	10,361.8271	9,631.9034	11,262.6833	12,229.3444	12,566.946	12,045.3212	11,940.0432	11,537.4893	11,248.0376	11,606.5043	11,748.6972	11,081.4186	11,709.9264	11,408.5376		11,340.9771	11,123.6502	10,342.216	10,832.4932	10,730.9268	11,681.0364	11,628.0714	11,876.6458	11,599.2316	11,821.4237	12,100.8441	11,910.6517	12,124.5179	12,724.4868	12,053.1957	11,789.6748	11,694.6789	11,478.7062	11,269.5045	11,210.8719	10,812.3304	10,778.8762	10,440.0708		10,221.2893	9,968.552	9,812.1147	9,476.419	9,240.0327	9,458.8142	9,596.794	9,479.93	9,420.3444	8,976.4115	9,115.896	9,272.3835	9,034.6429	8,355.2767	8,451.8776	9,068.7492	9,242.8415	9,437.6483	8,783.7614	9,210.8418	9,973.1163	10,000.9028	10,287.947	10,451.1052	9,948.5397	10,111.9989	9,598.8003	9,613.0446	9,972.6147	9,900.9916	10,000
M S C I All Country Worldex U S A Growth Net Total Return U S D Index 249 [Member]
Account Value [Line Items]
Account Value	17,859.1088	17,416.4288	16,879.5388	16,703.2129	16,549.4928	16,124.502	16,583.1756	16,132.1315	15,538.1051	15,657.7468	14,943.2875	13,541.835		14,090.1975	14,875.1307	15,674.4751	15,200.8251	14,644.7201		15,061.7989	14,910.9045	14,254.9945	14,892.6503	13,731.1594	13,943.9939	12,402.2719	12,163.3841	13,607.2226	14,159.4846	13,420.7805	14,610.9243	14,737.5738	15,922.2922	15,947.6674	16,406.3975		17,845.2061	17,323.236	17,972.3643	17,432.253	18,215.1516	17,812.7102	18,087.4848	18,018.1412	17,593.433	16,967.4193	17,021.1648	17,083.2179	16,980.1916	16,132.5836	14,643.7028	14,905.253	15,037.215	14,447.8793	13,530.5886	12,877.1087	12,340.2187	11,360.0271	12,757.4105	13,761.7904	13,895.2782	13,342.0554	13,141.5977	12,680.5505	12,531.5211	12,762.3273	12,789.0587	11,992.9922	12,641.2727	12,255.4466		12,059.2274	11,741.9537	10,911.9218	11,435.2482	11,264.5737	12,428.0991	12,531.6341	12,674.4469	12,460.4821	12,662.8048	12,735.1437	12,640.3685	12,815.5642	13,415.7507	12,751.4199	12,482.0707	12,346.2093	12,056.2887	11,848.5405	11,730.9333	11,338.0994	11,329.4527	10,847.2124		10,540.733	10,250.3038	10,048.094	9,659.2161	9,519.9073	9,896.9171	10,245.1609	10,088.1065	10,124.0498	9,659.3857	9,697.5896	9,760.6601	9,614.8521	8,938.3707	9,052.0218	9,647.1785	9,773.3194	9,884.1448	9,188.0528	9,548.6733	10,324.4511	10,297.4371	10,573.2855	10,688.4625	10,237.4749	10,348.0743	9,843.0021	9,769.5894	10,111.108	9,965.2434	10,000
M S C I All Country Worldex U S A Net Total Return U S D Index 250 [Member]
Account Value [Line Items]
Account Value	16,630.2031	16,194.1448	15,745.6978	15,389.3378	15,404.0336	14,969.4799	15,243.1825	14,781.1433	14,416.1563	14,560.8069	13,864.2371	12,719.3207		13,266.6757	13,699.3735	14,347.342	13,786.846	13,194.8018		13,692.6526	13,458.8242	13,137.6739	13,615.6126	12,594.0806	12,688.9762	11,349.2529	11,019.9271	12,243.4383	12,650.3057	12,231.5513	13,382.8375	13,287.4905	14,177.7637	14,155.1934	14,441.0338		14,993.5549	14,398.5013	15,077.4162	14,725.9212	15,213.0386	14,929.2546	15,179.3838	15,278.3922	14,814.9987	14,391.329	14,211.6693	13,935.81	13,905.5658	13,192.4946	11,628.3222	11,883.8181	12,183.301	11,683.1931	11,184.5398	10,700.9334	10,361.8271	9,631.9034	11,262.6833	12,229.3444	12,566.946	12,045.3212	11,940.0432	11,537.4893	11,248.0376	11,606.5043	11,748.6972	11,081.4186	11,709.9264	11,408.5376		11,340.9771	11,123.6502	10,342.216	10,832.4932	10,730.9268	11,681.0364	11,628.0714	11,876.6458	11,599.2316	11,821.4237	12,100.8441	11,910.6517	12,124.5179	12,724.4868	12,053.1957	11,789.6748	11,694.6789	11,478.7062	11,269.5045	11,210.8719	10,812.3304	10,778.8762	10,440.0708		10,221.2893	9,968.552	9,812.1147	9,476.419	9,240.0327	9,458.8142	9,596.794	9,479.93	9,420.3444	8,976.4115	9,115.896	9,272.3835	9,034.6429	8,355.2767	8,451.8776	9,068.7492	9,242.8415	9,437.6483	8,783.7614	9,210.8418	9,973.1163	10,000.9028	10,287.947	10,451.1052	9,948.5397	10,111.9989	9,598.8003	9,613.0446	9,972.6147	9,900.9916	10,000
M S C I All Country Worldex U S A Growth Net Total Return U S D Index 262 [Member]
Account Value [Line Items]
Account Value	17,859.1088	17,416.4288	16,879.5388	16,703.2129	16,549.4928	16,124.502	16,583.1756	16,132.1315	15,538.1051	15,657.7468	14,943.2875	13,541.835		14,090.1975	14,875.1307	15,674.4751	15,200.8251	14,644.7201		15,061.7989	14,910.9045	14,254.9945	14,892.6503	13,731.1594	13,943.9939	12,402.2719	12,163.3841	13,607.2226	14,159.4846	13,420.7805	14,610.9243	14,737.5738	15,922.2922	15,947.6674	16,406.3975		17,845.2061	17,323.236	17,972.3643	17,432.253	18,215.1516	17,812.7102	18,087.4848	18,018.1412	17,593.433	16,967.4193	17,021.1648	17,083.2179	16,980.1916	16,132.5836	14,643.7028	14,905.253	15,037.215	14,447.8793	13,530.5886	12,877.1087	12,340.2187	11,360.0271	12,757.4105	13,761.7904	13,895.2782	13,342.0554	13,141.5977	12,680.5505	12,531.5211	12,762.3273	12,789.0587	11,992.9922	12,641.2727	12,255.4466		12,059.2274	11,741.9537	10,911.9218	11,435.2482	11,264.5737	12,428.0991	12,531.6341	12,674.4469	12,460.4821	12,662.8048	12,735.1437	12,640.3685	12,815.5642	13,415.7507	12,751.4199	12,482.0707	12,346.2093	12,056.2887	11,848.5405	11,730.9333	11,338.0994	11,329.4527	10,847.2124		10,540.733	10,250.3038	10,048.094	9,659.2161	9,519.9073	9,896.9171	10,245.1609	10,088.1065	10,124.0498	9,659.3857	9,697.5896	9,760.6601	9,614.8521	8,938.3707	9,052.0218	9,647.1785	9,773.3194	9,884.1448	9,188.0528	9,548.6733	10,324.4511	10,297.4371	10,573.2855	10,688.4625	10,237.4749	10,348.0743	9,843.0021	9,769.5894	10,111.108	9,965.2434	10,000
M S C I All Country Worldex U S A Net Total Return U S D Index 263 [Member]
Account Value [Line Items]
Account Value	16,630.2031	16,194.1448	15,745.6978	15,389.3378	15,404.0336	14,969.4799	15,243.1825	14,781.1433	14,416.1563	14,560.8069	13,864.2371	12,719.3207		13,266.6757	13,699.3735	14,347.342	13,786.846	13,194.8018		13,692.6526	13,458.8242	13,137.6739	13,615.6126	12,594.0806	12,688.9762	11,349.2529	11,019.9271	12,243.4383	12,650.3057	12,231.5513	13,382.8375	13,287.4905	14,177.7637	14,155.1934	14,441.0338		14,993.5549	14,398.5013	15,077.4162	14,725.9212	15,213.0386	14,929.2546	15,179.3838	15,278.3922	14,814.9987	14,391.329	14,211.6693	13,935.81	13,905.5658	13,192.4946	11,628.3222	11,883.8181	12,183.301	11,683.1931	11,184.5398	10,700.9334	10,361.8271	9,631.9034	11,262.6833	12,229.3444	12,566.946	12,045.3212	11,940.0432	11,537.4893	11,248.0376	11,606.5043	11,748.6972	11,081.4186	11,709.9264	11,408.5376		11,340.9771	11,123.6502	10,342.216	10,832.4932	10,730.9268	11,681.0364	11,628.0714	11,876.6458	11,599.2316	11,821.4237	12,100.8441	11,910.6517	12,124.5179	12,724.4868	12,053.1957	11,789.6748	11,694.6789	11,478.7062	11,269.5045	11,210.8719	10,812.3304	10,778.8762	10,440.0708		10,221.2893	9,968.552	9,812.1147	9,476.419	9,240.0327	9,458.8142	9,596.794	9,479.93	9,420.3444	8,976.4115	9,115.896	9,272.3835	9,034.6429	8,355.2767	8,451.8776	9,068.7492	9,242.8415	9,437.6483	8,783.7614	9,210.8418	9,973.1163	10,000.9028	10,287.947	10,451.1052	9,948.5397	10,111.9989	9,598.8003	9,613.0446	9,972.6147	9,900.9916	10,000
M S C I All Country Worldex U S A Growth Net Total Return U S D Index 275 [Member]
Account Value [Line Items]
Account Value	17,859.1088	17,416.4288	16,879.5388	16,703.2129	16,549.4928	16,124.502	16,583.1756	16,132.1315	15,538.1051	15,657.7468	14,943.2875	13,541.835		14,090.1975	14,875.1307	15,674.4751	15,200.8251	14,644.7201		15,061.7989	14,910.9045	14,254.9945	14,892.6503	13,731.1594	13,943.9939	12,402.2719	12,163.3841	13,607.2226	14,159.4846	13,420.7805	14,610.9243	14,737.5738	15,922.2922	15,947.6674	16,406.3975		17,845.2061	17,323.236	17,972.3643	17,432.253	18,215.1516	17,812.7102	18,087.4848	18,018.1412	17,593.433	16,967.4193	17,021.1648	17,083.2179	16,980.1916	16,132.5836	14,643.7028	14,905.253	15,037.215	14,447.8793	13,530.5886	12,877.1087	12,340.2187	11,360.0271	12,757.4105	13,761.7904	13,895.2782	13,342.0554	13,141.5977	12,680.5505	12,531.5211	12,762.3273	12,789.0587	11,992.9922	12,641.2727	12,255.4466		12,059.2274	11,741.9537	10,911.9218	11,435.2482	11,264.5737	12,428.0991	12,531.6341	12,674.4469	12,460.4821	12,662.8048	12,735.1437	12,640.3685	12,815.5642	13,415.7507	12,751.4199	12,482.0707	12,346.2093	12,056.2887	11,848.5405	11,730.9333	11,338.0994	11,329.4527	10,847.2124		10,540.733	10,250.3038	10,048.094	9,659.2161	9,519.9073	9,896.9171	10,245.1609	10,088.1065	10,124.0498	9,659.3857	9,697.5896	9,760.6601	9,614.8521	8,938.3707	9,052.0218	9,647.1785	9,773.3194	9,884.1448	9,188.0528	9,548.6733	10,324.4511	10,297.4371	10,573.2855	10,688.4625	10,237.4749	10,348.0743	9,843.0021	9,769.5894	10,111.108	9,965.2434	10,000
M S C I All Country Worldex U S A Net Total Return U S D Index 276 [Member]
Account Value [Line Items]
Account Value	16,630.2031	16,194.1448	15,745.6978	15,389.3378	15,404.0336	14,969.4799	15,243.1825	14,781.1433	14,416.1563	14,560.8069	13,864.2371	12,719.3207		13,266.6757	13,699.3735	14,347.342	13,786.846	13,194.8018		13,692.6526	13,458.8242	13,137.6739	13,615.6126	12,594.0806	12,688.9762	11,349.2529	11,019.9271	12,243.4383	12,650.3057	12,231.5513	13,382.8375	13,287.4905	14,177.7637	14,155.1934	14,441.0338		14,993.5549	14,398.5013	15,077.4162	14,725.9212	15,213.0386	14,929.2546	15,179.3838	15,278.3922	14,814.9987	14,391.329	14,211.6693	13,935.81	13,905.5658	13,192.4946	11,628.3222	11,883.8181	12,183.301	11,683.1931	11,184.5398	10,700.9334	10,361.8271	9,631.9034	11,262.6833	12,229.3444	12,566.946	12,045.3212	11,940.0432	11,537.4893	11,248.0376	11,606.5043	11,748.6972	11,081.4186	11,709.9264	11,408.5376		11,340.9771	11,123.6502	10,342.216	10,832.4932	10,730.9268	11,681.0364	11,628.0714	11,876.6458	11,599.2316	11,821.4237	12,100.8441	11,910.6517	12,124.5179	12,724.4868	12,053.1957	11,789.6748	11,694.6789	11,478.7062	11,269.5045	11,210.8719	10,812.3304	10,778.8762	10,440.0708		10,221.2893	9,968.552	9,812.1147	9,476.419	9,240.0327	9,458.8142	9,596.794	9,479.93	9,420.3444	8,976.4115	9,115.896	9,272.3835	9,034.6429	8,355.2767	8,451.8776	9,068.7492	9,242.8415	9,437.6483	8,783.7614	9,210.8418	9,973.1163	10,000.9028	10,287.947	10,451.1052	9,948.5397	10,111.9989	9,598.8003	9,613.0446	9,972.6147	9,900.9916	10,000
M S C I All Country Worldex U S A Growth Net Total Return U S D Index 288 [Member]
Account Value [Line Items]
Account Value	17,859.1088	17,416.4288	16,879.5388	16,703.2129	16,549.4928	16,124.502	16,583.1756	16,132.1315	15,538.1051	15,657.7468	14,943.2875	13,541.835		14,090.1975	14,875.1307	15,674.4751	15,200.8251	14,644.7201		15,061.7989	14,910.9045	14,254.9945	14,892.6503	13,731.1594	13,943.9939	12,402.2719	12,163.3841	13,607.2226	14,159.4846	13,420.7805	14,610.9243	14,737.5738	15,922.2922	15,947.6674	16,406.3975		17,845.2061	17,323.236	17,972.3643	17,432.253	18,215.1516	17,812.7102	18,087.4848	18,018.1412	17,593.433	16,967.4193	17,021.1648	17,083.2179	16,980.1916	16,132.5836	14,643.7028	14,905.253	15,037.215	14,447.8793	13,530.5886	12,877.1087	12,340.2187	11,360.0271	12,757.4105	13,761.7904	13,895.2782	13,342.0554	13,141.5977	12,680.5505	12,531.5211	12,762.3273	12,789.0587	11,992.9922	12,641.2727	12,255.4466		12,059.2274	11,741.9537	10,911.9218	11,435.2482	11,264.5737	12,428.0991	12,531.6341	12,674.4469	12,460.4821	12,662.8048	12,735.1437	12,640.3685	12,815.5642	13,415.7507	12,751.4199	12,482.0707	12,346.2093	12,056.2887	11,848.5405	11,730.9333	11,338.0994	11,329.4527	10,847.2124		10,540.733	10,250.3038	10,048.094	9,659.2161	9,519.9073	9,896.9171	10,245.1609	10,088.1065	10,124.0498	9,659.3857	9,697.5896	9,760.6601	9,614.8521	8,938.3707	9,052.0218	9,647.1785	9,773.3194	9,884.1448	9,188.0528	9,548.6733	10,324.4511	10,297.4371	10,573.2855	10,688.4625	10,237.4749	10,348.0743	9,843.0021	9,769.5894	10,111.108	9,965.2434	10,000
M S C I All Country Worldex U S A Net Total Return U S D Index 289 [Member]
Account Value [Line Items]
Account Value	16,630.2031	16,194.1448	15,745.6978	15,389.3378	15,404.0336	14,969.4799	15,243.1825	14,781.1433	14,416.1563	14,560.8069	13,864.2371	12,719.3207		13,266.6757	13,699.3735	14,347.342	13,786.846	13,194.8018		13,692.6526	13,458.8242	13,137.6739	13,615.6126	12,594.0806	12,688.9762	11,349.2529	11,019.9271	12,243.4383	12,650.3057	12,231.5513	13,382.8375	13,287.4905	14,177.7637	14,155.1934	14,441.0338		14,993.5549	14,398.5013	15,077.4162	14,725.9212	15,213.0386	14,929.2546	15,179.3838	15,278.3922	14,814.9987	14,391.329	14,211.6693	13,935.81	13,905.5658	13,192.4946	11,628.3222	11,883.8181	12,183.301	11,683.1931	11,184.5398	10,700.9334	10,361.8271	9,631.9034	11,262.6833	12,229.3444	12,566.946	12,045.3212	11,940.0432	11,537.4893	11,248.0376	11,606.5043	11,748.6972	11,081.4186	11,709.9264	11,408.5376		11,340.9771	11,123.6502	10,342.216	10,832.4932	10,730.9268	11,681.0364	11,628.0714	11,876.6458	11,599.2316	11,821.4237	12,100.8441	11,910.6517	12,124.5179	12,724.4868	12,053.1957	11,789.6748	11,694.6789	11,478.7062	11,269.5045	11,210.8719	10,812.3304	10,778.8762	10,440.0708		10,221.2893	9,968.552	9,812.1147	9,476.419	9,240.0327	9,458.8142	9,596.794	9,479.93	9,420.3444	8,976.4115	9,115.896	9,272.3835	9,034.6429	8,355.2767	8,451.8776	9,068.7492	9,242.8415	9,437.6483	8,783.7614	9,210.8418	9,973.1163	10,000.9028	10,287.947	10,451.1052	9,948.5397	10,111.9989	9,598.8003	9,613.0446	9,972.6147	9,900.9916	10,000
M S C I Emerging Markets Net Total Return U S D Index 301 [Member]
Account Value [Line Items]
Account Value	14,836.9413	13,908.2248	13,687.2298	13,646.6316	13,128.7726	13,055.0442	12,996.8939	12,682.6205	12,106.6826	12,696.2008	12,218.5358	11,313.1508		11,770.481	12,086.5619	12,879.9749	12,125.1623	11,681.6264		11,881.1926	12,017.3761	11,664.0981	12,472.8751	11,560.0696	11,724.8646	10,210.4828	10,537.6467	11,937.0597	11,887.4238	11,916.7012	12,764.9348	12,708.9725	13,457.5776	13,768.5451	14,192.7689		14,466.6105	14,200.1655	14,803.4543	14,658.8752	15,265.5412	14,876.1362	15,949.5269	15,922.0809	15,561.216	15,183.1795	15,416.0186	15,299.0044	14,843.9098	13,827.4089	12,656.8156	12,401.3109	12,603.4695	12,330.8884	11,319.382	10,544.2822	10,463.8945	9,586.0744	11,331.345	11,962.1512	12,547.0316	11,675.9422	11,692.0435	11,218.9687	11,008.8189	11,573.0791	11,716.3501	11,028.0596	11,890.8962	11,645.7135		11,548.7963	11,522.8962	10,595.25	10,883.5281	10,452.7639	11,449.8575	11,510.9332	11,830.8432	11,576.5277	12,078.3567	12,522.0591	12,577.7121	12,815.9976	13,435.6494	12,401.9769	11,972.2115	11,948.2379	11,543.564	11,589.6561	11,336.7677	10,699.0168	10,592.3722	10,288.2068		10,067.8064	9,819.9124	9,528.2332	9,033.8723	9,013.9656	9,448.9157	9,426.4404	9,306.7626	9,081.0822	8,645.9894	8,313.7121	8,635.8577	8,589.171	7,585.4179	7,597.8566	8,124.9435	8,310.1921	8,647.5115	8,071.7401	8,322.0838	9,149.6497	9,831.1381	10,093.2546	10,514.3152	9,763.3793	9,904.2244	9,606.7659	9,549.5193	10,010.8928	10,117.8941	10,000
M S C I Emerging Markets Net Total Return U S D Index 313 [Member]
Account Value [Line Items]
Account Value	14,836.9413	13,908.2248	13,687.2298	13,646.6316	13,128.7726	13,055.0442	12,996.8939	12,682.6205	12,106.6826	12,696.2008	12,218.5358	11,313.1508		11,770.481	12,086.5619	12,879.9749	12,125.1623	11,681.6264		11,881.1926	12,017.3761	11,664.0981	12,472.8751	11,560.0696	11,724.8646	10,210.4828	10,537.6467	11,937.0597	11,887.4238	11,916.7012	12,764.9348	12,708.9725	13,457.5776	13,768.5451	14,192.7689		14,466.6105	14,200.1655	14,803.4543	14,658.8752	15,265.5412	14,876.1362	15,949.5269	15,922.0809	15,561.216	15,183.1795	15,416.0186	15,299.0044	14,843.9098	13,827.4089	12,656.8156	12,401.3109	12,603.4695	12,330.8884	11,319.382	10,544.2822	10,463.8945	9,586.0744	11,331.345	11,962.1512	12,547.0316	11,675.9422	11,692.0435	11,218.9687	11,008.8189	11,573.0791	11,716.3501	11,028.0596	11,890.8962	11,645.7135		11,548.7963	11,522.8962	10,595.25	10,883.5281	10,452.7639	11,449.8575	11,510.9332	11,830.8432	11,576.5277	12,078.3567	12,522.0591	12,577.7121	12,815.9976	13,435.6494	12,401.9769	11,972.2115	11,948.2379	11,543.564	11,589.6561	11,336.7677	10,699.0168	10,592.3722	10,288.2068		10,067.8064	9,819.9124	9,528.2332	9,033.8723	9,013.9656	9,448.9157	9,426.4404	9,306.7626	9,081.0822	8,645.9894	8,313.7121	8,635.8577	8,589.171	7,585.4179	7,597.8566	8,124.9435	8,310.1921	8,647.5115	8,071.7401	8,322.0838	9,149.6497	9,831.1381	10,093.2546	10,514.3152	9,763.3793	9,904.2244	9,606.7659	9,549.5193	10,010.8928	10,117.8941	10,000
M S C I Emerging Markets Net Total Return U S D Index 325 [Member]
Account Value [Line Items]
Account Value	14,836.9413	13,908.2248	13,687.2298	13,646.6316	13,128.7726	13,055.0442	12,996.8939	12,682.6205	12,106.6826	12,696.2008	12,218.5358	11,313.1508		11,770.481	12,086.5619	12,879.9749	12,125.1623	11,681.6264		11,881.1926	12,017.3761	11,664.0981	12,472.8751	11,560.0696	11,724.8646	10,210.4828	10,537.6467	11,937.0597	11,887.4238	11,916.7012	12,764.9348	12,708.9725	13,457.5776	13,768.5451	14,192.7689		14,466.6105	14,200.1655	14,803.4543	14,658.8752	15,265.5412	14,876.1362	15,949.5269	15,922.0809	15,561.216	15,183.1795	15,416.0186	15,299.0044	14,843.9098	13,827.4089	12,656.8156	12,401.3109	12,603.4695	12,330.8884	11,319.382	10,544.2822	10,463.8945	9,586.0744	11,331.345	11,962.1512	12,547.0316	11,675.9422	11,692.0435	11,218.9687	11,008.8189	11,573.0791	11,716.3501	11,028.0596	11,890.8962	11,645.7135		11,548.7963	11,522.8962	10,595.25	10,883.5281	10,452.7639	11,449.8575	11,510.9332	11,830.8432	11,576.5277	12,078.3567	12,522.0591	12,577.7121	12,815.9976	13,435.6494	12,401.9769	11,972.2115	11,948.2379	11,543.564	11,589.6561	11,336.7677	10,699.0168	10,592.3722	10,288.2068		10,067.8064	9,819.9124	9,528.2332	9,033.8723	9,013.9656	9,448.9157	9,426.4404	9,306.7626	9,081.0822	8,645.9894	8,313.7121	8,635.8577	8,589.171	7,585.4179	7,597.8566	8,124.9435	8,310.1921	8,647.5115	8,071.7401	8,322.0838	9,149.6497	9,831.1381	10,093.2546	10,514.3152	9,763.3793	9,904.2244	9,606.7659	9,549.5193	10,010.8928	10,117.8941	10,000
M S C I Emerging Markets Net Total Return U S D Index 336 [Member]
Account Value [Line Items]
Account Value	14,836.9413	13,908.2248	13,687.2298	13,646.6316	13,128.7726	13,055.0442	12,996.8939	12,682.6205	12,106.6826	12,696.2008	12,218.5358	11,313.1508		11,770.481	12,086.5619	12,879.9749	12,125.1623	11,681.6264		11,881.1926	12,017.3761	11,664.0981	12,472.8751	11,560.0696	11,724.8646	10,210.4828	10,537.6467	11,937.0597	11,887.4238	11,916.7012	12,764.9348	12,708.9725	13,457.5776	13,768.5451	14,192.7689		14,466.6105	14,200.1655	14,803.4543	14,658.8752	15,265.5412	14,876.1362	15,949.5269	15,922.0809	15,561.216	15,183.1795	15,416.0186	15,299.0044	14,843.9098	13,827.4089	12,656.8156	12,401.3109	12,603.4695	12,330.8884	11,319.382	10,544.2822	10,463.8945	9,586.0744	11,331.345	11,962.1512	12,547.0316	11,675.9422	11,692.0435	11,218.9687	11,008.8189	11,573.0791	11,716.3501	11,028.0596	11,890.8962	11,645.7135		11,548.7963	11,522.8962	10,595.25	10,883.5281	10,452.7639	11,449.8575	11,510.9332	11,830.8432	11,576.5277	12,078.3567	12,522.0591	12,577.7121	12,815.9976	13,435.6494	12,401.9769	11,972.2115	11,948.2379	11,543.564	11,589.6561	11,336.7677	10,699.0168	10,592.3722	10,288.2068		10,067.8064	9,819.9124	9,528.2332	9,033.8723	9,013.9656	9,448.9157	9,426.4404	9,306.7626	9,081.0822	8,645.9894	8,313.7121	8,635.8577	8,589.171	7,585.4179	7,597.8566	8,124.9435	8,310.1921	8,647.5115	8,071.7401	8,322.0838	9,149.6497	9,831.1381	10,093.2546	10,514.3152	9,763.3793	9,904.2244	9,606.7659	9,549.5193	10,010.8928	10,117.8941	10,000
M S C I Emerging Markets Net Total Return U S D Index 347 [Member]
Account Value [Line Items]
Account Value	14,836.9413	13,908.2248	13,687.2298	13,646.6316	13,128.7726	13,055.0442	12,996.8939	12,682.6205	12,106.6826	12,696.2008	12,218.5358	11,313.1508		11,770.481	12,086.5619	12,879.9749	12,125.1623	11,681.6264		11,881.1926	12,017.3761	11,664.0981	12,472.8751	11,560.0696	11,724.8646	10,210.4828	10,537.6467	11,937.0597	11,887.4238	11,916.7012	12,764.9348	12,708.9725	13,457.5776	13,768.5451	14,192.7689		14,466.6105	14,200.1655	14,803.4543	14,658.8752	15,265.5412	14,876.1362	15,949.5269	15,922.0809	15,561.216	15,183.1795	15,416.0186	15,299.0044	14,843.9098	13,827.4089	12,656.8156	12,401.3109	12,603.4695	12,330.8884	11,319.382	10,544.2822	10,463.8945	9,586.0744	11,331.345	11,962.1512	12,547.0316	11,675.9422	11,692.0435	11,218.9687	11,008.8189	11,573.0791	11,716.3501	11,028.0596	11,890.8962	11,645.7135		11,548.7963	11,522.8962	10,595.25	10,883.5281	10,452.7639	11,449.8575	11,510.9332	11,830.8432	11,576.5277	12,078.3567	12,522.0591	12,577.7121	12,815.9976	13,435.6494	12,401.9769	11,972.2115	11,948.2379	11,543.564	11,589.6561	11,336.7677	10,699.0168	10,592.3722	10,288.2068		10,067.8064	9,819.9124	9,528.2332	9,033.8723	9,013.9656	9,448.9157	9,426.4404	9,306.7626	9,081.0822	8,645.9894	8,313.7121	8,635.8577	8,589.171	7,585.4179	7,597.8566	8,124.9435	8,310.1921	8,647.5115	8,071.7401	8,322.0838	9,149.6497	9,831.1381	10,093.2546	10,514.3152	9,763.3793	9,904.2244	9,606.7659	9,549.5193	10,010.8928	10,117.8941	10,000
Russell 2500 Index 358 [Member]
Account Value [Line Items]
Account Value	24,772.5666	24,409.1674	24,472.081	22,779.6538	23,126.2073	22,202.6637	23,796.8771	22,853.6855	21,674.6733	22,256.8203	20,102.3781	18,442.2218		19,634.7846	20,796.218	21,646.0933	20,620.8915	19,002.1652		19,341.298	19,596.9612	20,360.1753	20,849.5055	18,954.3524	20,152.9477	19,336.6212	17,643.8243	19,501.3551	20,033.8601	18,155.3711	20,073.1949	20,005.6498	21,868.9407	21,526.6814	21,286.9299		23,219.6145	22,482.217	23,460.9617	22,364.3813	23,090.6283	22,578.1215	22,980.6608	22,712.2061	22,665.269	21,794.5653	21,441.9079	20,128.7527	19,647.3167	18,257.5481	15,699.9633	15,420.7019	15,829.9744	15,144.3075	14,563.9768	14,155.1648	13,181.5316	11,507.1307	14,696.1543	16,041.2367	16,373.6882	16,034.6203	15,374.7508	15,085.9475	14,823.1686	15,440.8687	15,281.9079	14,269.5432	15,362.5365	14,842.4403		14,965.7053	14,290.7738	12,815.3626	14,392.419	14,125.6248	15,721.7583	15,963.6244	15,307.063	15,016.5214	14,908.7918	14,239.2118	14,205.5593	14,070.4951	14,673.9183	14,239.6269	14,191.8661	13,740.4631	13,530.7446	12,943.6937	13,052.007	12,918.2402	12,603.3544	12,745.8521		12,648.2611	12,657.2451	12,359.5098	12,190.3391	11,958.1705	11,020.6417	11,486.8731	11,432.0677	11,341.6249	10,779.4502	10,783.7702	10,561.1175	10,407.6184	9,607.3008	9,540.2877	10,366.9084	10,807.0053	10,598.8371	10,037.8688	10,507.9662	11,169.2953	11,190.0848	11,268.3263	11,031.8505	11,228.531	11,081.4277	10,457.9285	10,676.6699	10,533.251	10,442.5942	10,000
Russell 3000 Index 359 [Member]
Account Value [Line Items]
Account Value	33,431.7499	32,754.2021	32,056.3767	31,471.3556	30,526.3399	29,149.1283	30,490.7763	29,537.9574	28,021.1577	27,714.0123	26,318.0536	24,073.2616		24,728.7907	25,965.6445	26,476.7444	25,560.4836	23,926.6418		23,833.9098	23,582.6516	22,968.4935	23,518.1774	22,002.7861	23,371.2533	22,211.8772	20,528.4243	22,626.5647	23,503.707	21,487.7688	23,449.5237	23,481.0071	25,795.9975	24,985.5606	25,631.1915		27,233.5057	26,201.7175	26,606.7068	24,921.4084	26,092.107	25,368.648	24,946.7819	24,346.427	24,235.7902	23,047.7	22,250.1888	21,575.7888	21,672.1852	20,739.1715	18,489.825	18,897.6985	19,611.7831	18,286.9924	17,304.3924	16,917.6229	16,058.8224	14,180.724	16,441.7593	17,907.9411	17,927.5233	17,424.4142	16,786.3352	16,432.5919	16,149.1603	16,485.2181	16,243.7537	15,177.7201	16,227.8554	15,604.728		15,380.151	14,857.6224	13,683.1425	15,087.3096	14,791.0638	15,966.738	15,940.3524	15,399.5545	14,904.9227	14,808.0786	14,401.5198	14,346.9915	14,640.8928	15,201.2038	14,440.0596	14,297.1609	13,875.8204	13,579.4861	13,256.1965	13,230.7044	12,985.8568	12,869.7154	12,739.3407		12,605.7226	12,597.1533	12,145.4442	11,921.0671	11,692.9016	11,192.0343	11,439.536	11,421.5817	11,392.5207	10,957.6458	10,935.16	10,742.9652	10,676.794	9,974.5274	9,977.7406	10,574.4045	10,795.9966	10,736.4785	9,950.534	10,249.1933	10,907.6844	10,728.2506	10,910.7933	10,761.9405	10,713.4813	10,823.5111	10,231.1204	10,524.0202	10,524.1387	10,275.133	10,000
Russell 2500 Index 372 [Member]
Account Value [Line Items]
Account Value	24,772.5666	24,409.1674	24,472.081	22,779.6538	23,126.2073	22,202.6637	23,796.8771	22,853.6855	21,674.6733	22,256.8203	20,102.3781	18,442.2218		19,634.7846	20,796.218	21,646.0933	20,620.8915	19,002.1652		19,341.298	19,596.9612	20,360.1753	20,849.5055	18,954.3524	20,152.9477	19,336.6212	17,643.8243	19,501.3551	20,033.8601	18,155.3711	20,073.1949	20,005.6498	21,868.9407	21,526.6814	21,286.9299		23,219.6145	22,482.217	23,460.9617	22,364.3813	23,090.6283	22,578.1215	22,980.6608	22,712.2061	22,665.269	21,794.5653	21,441.9079	20,128.7527	19,647.3167	18,257.5481	15,699.9633	15,420.7019	15,829.9744	15,144.3075	14,563.9768	14,155.1648	13,181.5316	11,507.1307	14,696.1543	16,041.2367	16,373.6882	16,034.6203	15,374.7508	15,085.9475	14,823.1686	15,440.8687	15,281.9079	14,269.5432	15,362.5365	14,842.4403		14,965.7053	14,290.7738	12,815.3626	14,392.419	14,125.6248	15,721.7583	15,963.6244	15,307.063	15,016.5214	14,908.7918	14,239.2118	14,205.5593	14,070.4951	14,673.9183	14,239.6269	14,191.8661	13,740.4631	13,530.7446	12,943.6937	13,052.007	12,918.2402	12,603.3544	12,745.8521		12,648.2611	12,657.2451	12,359.5098	12,190.3391	11,958.1705	11,020.6417	11,486.8731	11,432.0677	11,341.6249	10,779.4502	10,783.7702	10,561.1175	10,407.6184	9,607.3008	9,540.2877	10,366.9084	10,807.0053	10,598.8371	10,037.8688	10,507.9662	11,169.2953	11,190.0848	11,268.3263	11,031.8505	11,228.531	11,081.4277	10,457.9285	10,676.6699	10,533.251	10,442.5942	10,000
Russell 3000 Index 373 [Member]
Account Value [Line Items]
Account Value	33,431.7499	32,754.2021	32,056.3767	31,471.3556	30,526.3399	29,149.1283	30,490.7763	29,537.9574	28,021.1577	27,714.0123	26,318.0536	24,073.2616		24,728.7907	25,965.6445	26,476.7444	25,560.4836	23,926.6418		23,833.9098	23,582.6516	22,968.4935	23,518.1774	22,002.7861	23,371.2533	22,211.8772	20,528.4243	22,626.5647	23,503.707	21,487.7688	23,449.5237	23,481.0071	25,795.9975	24,985.5606	25,631.1915		27,233.5057	26,201.7175	26,606.7068	24,921.4084	26,092.107	25,368.648	24,946.7819	24,346.427	24,235.7902	23,047.7	22,250.1888	21,575.7888	21,672.1852	20,739.1715	18,489.825	18,897.6985	19,611.7831	18,286.9924	17,304.3924	16,917.6229	16,058.8224	14,180.724	16,441.7593	17,907.9411	17,927.5233	17,424.4142	16,786.3352	16,432.5919	16,149.1603	16,485.2181	16,243.7537	15,177.7201	16,227.8554	15,604.728		15,380.151	14,857.6224	13,683.1425	15,087.3096	14,791.0638	15,966.738	15,940.3524	15,399.5545	14,904.9227	14,808.0786	14,401.5198	14,346.9915	14,640.8928	15,201.2038	14,440.0596	14,297.1609	13,875.8204	13,579.4861	13,256.1965	13,230.7044	12,985.8568	12,869.7154	12,739.3407		12,605.7226	12,597.1533	12,145.4442	11,921.0671	11,692.9016	11,192.0343	11,439.536	11,421.5817	11,392.5207	10,957.6458	10,935.16	10,742.9652	10,676.794	9,974.5274	9,977.7406	10,574.4045	10,795.9966	10,736.4785	9,950.534	10,249.1933	10,907.6844	10,728.2506	10,910.7933	10,761.9405	10,713.4813	10,823.5111	10,231.1204	10,524.0202	10,524.1387	10,275.133	10,000
Russell 2500 Index 386 [Member]
Account Value [Line Items]
Account Value	24,772.5666	24,409.1674	24,472.081	22,779.6538	23,126.2073	22,202.6637	23,796.8771	22,853.6855	21,674.6733	22,256.8203	20,102.3781	18,442.2218		19,634.7846	20,796.218	21,646.0933	20,620.8915	19,002.1652		19,341.298	19,596.9612	20,360.1753	20,849.5055	18,954.3524	20,152.9477	19,336.6212	17,643.8243	19,501.3551	20,033.8601	18,155.3711	20,073.1949	20,005.6498	21,868.9407	21,526.6814	21,286.9299		23,219.6145	22,482.217	23,460.9617	22,364.3813	23,090.6283	22,578.1215	22,980.6608	22,712.2061	22,665.269	21,794.5653	21,441.9079	20,128.7527	19,647.3167	18,257.5481	15,699.9633	15,420.7019	15,829.9744	15,144.3075	14,563.9768	14,155.1648	13,181.5316	11,507.1307	14,696.1543	16,041.2367	16,373.6882	16,034.6203	15,374.7508	15,085.9475	14,823.1686	15,440.8687	15,281.9079	14,269.5432	15,362.5365	14,842.4403		14,965.7053	14,290.7738	12,815.3626	14,392.419	14,125.6248	15,721.7583	15,963.6244	15,307.063	15,016.5214	14,908.7918	14,239.2118	14,205.5593	14,070.4951	14,673.9183	14,239.6269	14,191.8661	13,740.4631	13,530.7446	12,943.6937	13,052.007	12,918.2402	12,603.3544	12,745.8521		12,648.2611	12,657.2451	12,359.5098	12,190.3391	11,958.1705	11,020.6417	11,486.8731	11,432.0677	11,341.6249	10,779.4502	10,783.7702	10,561.1175	10,407.6184	9,607.3008	9,540.2877	10,366.9084	10,807.0053	10,598.8371	10,037.8688	10,507.9662	11,169.2953	11,190.0848	11,268.3263	11,031.8505	11,228.531	11,081.4277	10,457.9285	10,676.6699	10,533.251	10,442.5942	10,000
Russell 3000 Index 387 [Member]
Account Value [Line Items]
Account Value	33,431.7499	32,754.2021	32,056.3767	31,471.3556	30,526.3399	29,149.1283	30,490.7763	29,537.9574	28,021.1577	27,714.0123	26,318.0536	24,073.2616		24,728.7907	25,965.6445	26,476.7444	25,560.4836	23,926.6418		23,833.9098	23,582.6516	22,968.4935	23,518.1774	22,002.7861	23,371.2533	22,211.8772	20,528.4243	22,626.5647	23,503.707	21,487.7688	23,449.5237	23,481.0071	25,795.9975	24,985.5606	25,631.1915		27,233.5057	26,201.7175	26,606.7068	24,921.4084	26,092.107	25,368.648	24,946.7819	24,346.427	24,235.7902	23,047.7	22,250.1888	21,575.7888	21,672.1852	20,739.1715	18,489.825	18,897.6985	19,611.7831	18,286.9924	17,304.3924	16,917.6229	16,058.8224	14,180.724	16,441.7593	17,907.9411	17,927.5233	17,424.4142	16,786.3352	16,432.5919	16,149.1603	16,485.2181	16,243.7537	15,177.7201	16,227.8554	15,604.728		15,380.151	14,857.6224	13,683.1425	15,087.3096	14,791.0638	15,966.738	15,940.3524	15,399.5545	14,904.9227	14,808.0786	14,401.5198	14,346.9915	14,640.8928	15,201.2038	14,440.0596	14,297.1609	13,875.8204	13,579.4861	13,256.1965	13,230.7044	12,985.8568	12,869.7154	12,739.3407		12,605.7226	12,597.1533	12,145.4442	11,921.0671	11,692.9016	11,192.0343	11,439.536	11,421.5817	11,392.5207	10,957.6458	10,935.16	10,742.9652	10,676.794	9,974.5274	9,977.7406	10,574.4045	10,795.9966	10,736.4785	9,950.534	10,249.1933	10,907.6844	10,728.2506	10,910.7933	10,761.9405	10,713.4813	10,823.5111	10,231.1204	10,524.0202	10,524.1387	10,275.133	10,000
Russell 2500 Index 399 [Member]
Account Value [Line Items]
Account Value	24,772.5666	24,409.1674	24,472.081	22,779.6538	23,126.2073	22,202.6637	23,796.8771	22,853.6855	21,674.6733	22,256.8203	20,102.3781	18,442.2218		19,634.7846	20,796.218	21,646.0933	20,620.8915	19,002.1652		19,341.298	19,596.9612	20,360.1753	20,849.5055	18,954.3524	20,152.9477	19,336.6212	17,643.8243	19,501.3551	20,033.8601	18,155.3711	20,073.1949	20,005.6498	21,868.9407	21,526.6814	21,286.9299		23,219.6145	22,482.217	23,460.9617	22,364.3813	23,090.6283	22,578.1215	22,980.6608	22,712.2061	22,665.269	21,794.5653	21,441.9079	20,128.7527	19,647.3167	18,257.5481	15,699.9633	15,420.7019	15,829.9744	15,144.3075	14,563.9768	14,155.1648	13,181.5316	11,507.1307	14,696.1543	16,041.2367	16,373.6882	16,034.6203	15,374.7508	15,085.9475	14,823.1686	15,440.8687	15,281.9079	14,269.5432	15,362.5365	14,842.4403		14,965.7053	14,290.7738	12,815.3626	14,392.419	14,125.6248	15,721.7583	15,963.6244	15,307.063	15,016.5214	14,908.7918	14,239.2118	14,205.5593	14,070.4951	14,673.9183	14,239.6269	14,191.8661	13,740.4631	13,530.7446	12,943.6937	13,052.007	12,918.2402	12,603.3544	12,745.8521		12,648.2611	12,657.2451	12,359.5098	12,190.3391	11,958.1705	11,020.6417	11,486.8731	11,432.0677	11,341.6249	10,779.4502	10,783.7702	10,561.1175	10,407.6184	9,607.3008	9,540.2877	10,366.9084	10,807.0053	10,598.8371	10,037.8688	10,507.9662	11,169.2953	11,190.0848	11,268.3263	11,031.8505	11,228.531	11,081.4277	10,457.9285	10,676.6699	10,533.251	10,442.5942	10,000
Russell 3000 Index 400 [Member]
Account Value [Line Items]
Account Value	33,431.7499	32,754.2021	32,056.3767	31,471.3556	30,526.3399	29,149.1283	30,490.7763	29,537.9574	28,021.1577	27,714.0123	26,318.0536	24,073.2616		24,728.7907	25,965.6445	26,476.7444	25,560.4836	23,926.6418		23,833.9098	23,582.6516	22,968.4935	23,518.1774	22,002.7861	23,371.2533	22,211.8772	20,528.4243	22,626.5647	23,503.707	21,487.7688	23,449.5237	23,481.0071	25,795.9975	24,985.5606	25,631.1915		27,233.5057	26,201.7175	26,606.7068	24,921.4084	26,092.107	25,368.648	24,946.7819	24,346.427	24,235.7902	23,047.7	22,250.1888	21,575.7888	21,672.1852	20,739.1715	18,489.825	18,897.6985	19,611.7831	18,286.9924	17,304.3924	16,917.6229	16,058.8224	14,180.724	16,441.7593	17,907.9411	17,927.5233	17,424.4142	16,786.3352	16,432.5919	16,149.1603	16,485.2181	16,243.7537	15,177.7201	16,227.8554	15,604.728		15,380.151	14,857.6224	13,683.1425	15,087.3096	14,791.0638	15,966.738	15,940.3524	15,399.5545	14,904.9227	14,808.0786	14,401.5198	14,346.9915	14,640.8928	15,201.2038	14,440.0596	14,297.1609	13,875.8204	13,579.4861	13,256.1965	13,230.7044	12,985.8568	12,869.7154	12,739.3407		12,605.7226	12,597.1533	12,145.4442	11,921.0671	11,692.9016	11,192.0343	11,439.536	11,421.5817	11,392.5207	10,957.6458	10,935.16	10,742.9652	10,676.794	9,974.5274	9,977.7406	10,574.4045	10,795.9966	10,736.4785	9,950.534	10,249.1933	10,907.6844	10,728.2506	10,910.7933	10,761.9405	10,713.4813	10,823.5111	10,231.1204	10,524.0202	10,524.1387	10,275.133	10,000
Russell 2500 Index 412 [Member]
Account Value [Line Items]
Account Value	24,772.5666	24,409.1674	24,472.081	22,779.6538	23,126.2073	22,202.6637	23,796.8771	22,853.6855	21,674.6733	22,256.8203	20,102.3781	18,442.2218		19,634.7846	20,796.218	21,646.0933	20,620.8915	19,002.1652		19,341.298	19,596.9612	20,360.1753	20,849.5055	18,954.3524	20,152.9477	19,336.6212	17,643.8243	19,501.3551	20,033.8601	18,155.3711	20,073.1949	20,005.6498	21,868.9407	21,526.6814	21,286.9299		23,219.6145	22,482.217	23,460.9617	22,364.3813	23,090.6283	22,578.1215	22,980.6608	22,712.2061	22,665.269	21,794.5653	21,441.9079	20,128.7527	19,647.3167	18,257.5481	15,699.9633	15,420.7019	15,829.9744	15,144.3075	14,563.9768	14,155.1648	13,181.5316	11,507.1307	14,696.1543	16,041.2367	16,373.6882	16,034.6203	15,374.7508	15,085.9475	14,823.1686	15,440.8687	15,281.9079	14,269.5432	15,362.5365	14,842.4403		14,965.7053	14,290.7738	12,815.3626	14,392.419	14,125.6248	15,721.7583	15,963.6244	15,307.063	15,016.5214	14,908.7918	14,239.2118	14,205.5593	14,070.4951	14,673.9183	14,239.6269	14,191.8661	13,740.4631	13,530.7446	12,943.6937	13,052.007	12,918.2402	12,603.3544	12,745.8521		12,648.2611	12,657.2451	12,359.5098	12,190.3391	11,958.1705	11,020.6417	11,486.8731	11,432.0677	11,341.6249	10,779.4502	10,783.7702	10,561.1175	10,407.6184	9,607.3008	9,540.2877	10,366.9084	10,807.0053	10,598.8371	10,037.8688	10,507.9662	11,169.2953	11,190.0848	11,268.3263	11,031.8505	11,228.531	11,081.4277	10,457.9285	10,676.6699	10,533.251	10,442.5942	10,000
Russell 3000 Index 413 [Member]
Account Value [Line Items]
Account Value	33,431.7499	32,754.2021	32,056.3767	31,471.3556	30,526.3399	29,149.1283	30,490.7763	29,537.9574	28,021.1577	27,714.0123	26,318.0536	24,073.2616		24,728.7907	25,965.6445	26,476.7444	25,560.4836	23,926.6418		23,833.9098	23,582.6516	22,968.4935	23,518.1774	22,002.7861	23,371.2533	22,211.8772	20,528.4243	22,626.5647	23,503.707	21,487.7688	23,449.5237	23,481.0071	25,795.9975	24,985.5606	25,631.1915		27,233.5057	26,201.7175	26,606.7068	24,921.4084	26,092.107	25,368.648	24,946.7819	24,346.427	24,235.7902	23,047.7	22,250.1888	21,575.7888	21,672.1852	20,739.1715	18,489.825	18,897.6985	19,611.7831	18,286.9924	17,304.3924	16,917.6229	16,058.8224	14,180.724	16,441.7593	17,907.9411	17,927.5233	17,424.4142	16,786.3352	16,432.5919	16,149.1603	16,485.2181	16,243.7537	15,177.7201	16,227.8554	15,604.728		15,380.151	14,857.6224	13,683.1425	15,087.3096	14,791.0638	15,966.738	15,940.3524	15,399.5545	14,904.9227	14,808.0786	14,401.5198	14,346.9915	14,640.8928	15,201.2038	14,440.0596	14,297.1609	13,875.8204	13,579.4861	13,256.1965	13,230.7044	12,985.8568	12,869.7154	12,739.3407		12,605.7226	12,597.1533	12,145.4442	11,921.0671	11,692.9016	11,192.0343	11,439.536	11,421.5817	11,392.5207	10,957.6458	10,935.16	10,742.9652	10,676.794	9,974.5274	9,977.7406	10,574.4045	10,795.9966	10,736.4785	9,950.534	10,249.1933	10,907.6844	10,728.2506	10,910.7933	10,761.9405	10,713.4813	10,823.5111	10,231.1204	10,524.0202	10,524.1387	10,275.133	10,000
Russell 2500 Index 425 [Member]
Account Value [Line Items]
Account Value	24,772.5666	24,409.1674	24,472.081	22,779.6538	23,126.2073	22,202.6637	23,796.8771	22,853.6855	21,674.6733	22,256.8203	20,102.3781	18,442.2218		19,634.7846	20,796.218	21,646.0933	20,620.8915	19,002.1652		19,341.298	19,596.9612	20,360.1753	20,849.5055	18,954.3524	20,152.9477	19,336.6212	17,643.8243	19,501.3551	20,033.8601	18,155.3711	20,073.1949	20,005.6498	21,868.9407	21,526.6814	21,286.9299		23,219.6145	22,482.217	23,460.9617	22,364.3813	23,090.6283	22,578.1215	22,980.6608	22,712.2061	22,665.269	21,794.5653	21,441.9079	20,128.7527	19,647.3167	18,257.5481	15,699.9633	15,420.7019	15,829.9744	15,144.3075	14,563.9768	14,155.1648	13,181.5316	11,507.1307	14,696.1543	16,041.2367	16,373.6882	16,034.6203	15,374.7508	15,085.9475	14,823.1686	15,440.8687	15,281.9079	14,269.5432	15,362.5365	14,842.4403		14,965.7053	14,290.7738	12,815.3626	14,392.419	14,125.6248	15,721.7583	15,963.6244	15,307.063	15,016.5214	14,908.7918	14,239.2118	14,205.5593	14,070.4951	14,673.9183	14,239.6269	14,191.8661	13,740.4631	13,530.7446	12,943.6937	13,052.007	12,918.2402	12,603.3544	12,745.8521		12,648.2611	12,657.2451	12,359.5098	12,190.3391	11,958.1705	11,020.6417	11,486.8731	11,432.0677	11,341.6249	10,779.4502	10,783.7702	10,561.1175	10,407.6184	9,607.3008	9,540.2877	10,366.9084	10,807.0053	10,598.8371	10,037.8688	10,507.9662	11,169.2953	11,190.0848	11,268.3263	11,031.8505	11,228.531	11,081.4277	10,457.9285	10,676.6699	10,533.251	10,442.5942	10,000
Russell 3000 Index 426 [Member]
Account Value [Line Items]
Account Value	33,431.7499	32,754.2021	32,056.3767	31,471.3556	30,526.3399	29,149.1283	30,490.7763	29,537.9574	28,021.1577	27,714.0123	26,318.0536	24,073.2616		24,728.7907	25,965.6445	26,476.7444	25,560.4836	23,926.6418		23,833.9098	23,582.6516	22,968.4935	23,518.1774	22,002.7861	23,371.2533	22,211.8772	20,528.4243	22,626.5647	23,503.707	21,487.7688	23,449.5237	23,481.0071	25,795.9975	24,985.5606	25,631.1915		27,233.5057	26,201.7175	26,606.7068	24,921.4084	26,092.107	25,368.648	24,946.7819	24,346.427	24,235.7902	23,047.7	22,250.1888	21,575.7888	21,672.1852	20,739.1715	18,489.825	18,897.6985	19,611.7831	18,286.9924	17,304.3924	16,917.6229	16,058.8224	14,180.724	16,441.7593	17,907.9411	17,927.5233	17,424.4142	16,786.3352	16,432.5919	16,149.1603	16,485.2181	16,243.7537	15,177.7201	16,227.8554	15,604.728		15,380.151	14,857.6224	13,683.1425	15,087.3096	14,791.0638	15,966.738	15,940.3524	15,399.5545	14,904.9227	14,808.0786	14,401.5198	14,346.9915	14,640.8928	15,201.2038	14,440.0596	14,297.1609	13,875.8204	13,579.4861	13,256.1965	13,230.7044	12,985.8568	12,869.7154	12,739.3407		12,605.7226	12,597.1533	12,145.4442	11,921.0671	11,692.9016	11,192.0343	11,439.536	11,421.5817	11,392.5207	10,957.6458	10,935.16	10,742.9652	10,676.794	9,974.5274	9,977.7406	10,574.4045	10,795.9966	10,736.4785	9,950.534	10,249.1933	10,907.6844	10,728.2506	10,910.7933	10,761.9405	10,713.4813	10,823.5111	10,231.1204	10,524.0202	10,524.1387	10,275.133	10,000
Russell 2500 Growth Index 438 [Member]
Account Value [Line Items]
Account Value	25,896.2783	25,480.0609	25,678.8142	24,204.6697	24,335.2077	23,386.8052	25,269.8333	24,605.9376	22,761.5874	23,288.4146	20,953.669	19,247.8226		20,683.4408	22,008.7799	22,942.7346	22,201.3119	20,576.9268		20,599.5155	20,862.9602	21,201.0069	21,541.5216	19,581.585	20,820.7972	20,218.9499	18,699.3733	20,461.7857	20,858.2091	18,722.174	20,114.1512	20,614.5915	23,272.0162	23,105.4685	23,036.1894		26,537.2003	26,407.8058	27,842.3583	26,484.4226	27,531.9742	26,859.9901	27,454.0778	26,055.8928	26,800.8006	25,891.2666	26,784.6666	25,968.988	25,262.836	23,261.6193	20,304.3825	20,067.4919	20,222.8453	19,351.8531	18,347.7442	17,696.2018	16,022.9423	13,808.8142	16,783.1069	18,004.3493	17,984.6195	17,819.1862	16,682.9543	16,265.5525	16,577.3348	17,062.034	16,799.8243	15,587.31	16,696.3052	16,131.6617		16,171.8137	15,172.0319	13,557.5089	15,207.8413	14,926.0048	16,963.5247	17,214.9293	16,125.5881	15,829.152	15,697.7623	14,904.7482	15,000.0019	14,878.445	15,382.9032	14,651.4962	14,612.0578	14,145.5599	13,776.9956	13,223.521	13,197.7486	13,024.4312	12,734.1543	12,728.316		12,508.3392	12,416.8331	12,051.3124	11,772.4747	11,668.1758	10,875.3738	11,474.5198	11,441.5829	11,362.6518	10,725.3879	10,805.4548	10,543.6262	10,443.495	9,697.0839	9,667.8382	10,728.7855	11,121.7296	10,875.4516	10,335.3979	10,932.9725	11,756.6519	11,618.9727	11,657.0691	11,308.2289	11,548.3692	11,362.1033	10,583.1968	10,748.8712	10,613.8136	10,440.1539	10,000
Russell 3000 Index 439 [Member]
Account Value [Line Items]
Account Value	33,431.7499	32,754.2021	32,056.3767	31,471.3556	30,526.3399	29,149.1283	30,490.7763	29,537.9574	28,021.1577	27,714.0123	26,318.0536	24,073.2616		24,728.7907	25,965.6445	26,476.7444	25,560.4836	23,926.6418		23,833.9098	23,582.6516	22,968.4935	23,518.1774	22,002.7861	23,371.2533	22,211.8772	20,528.4243	22,626.5647	23,503.707	21,487.7688	23,449.5237	23,481.0071	25,795.9975	24,985.5606	25,631.1915		27,233.5057	26,201.7175	26,606.7068	24,921.4084	26,092.107	25,368.648	24,946.7819	24,346.427	24,235.7902	23,047.7	22,250.1888	21,575.7888	21,672.1852	20,739.1715	18,489.825	18,897.6985	19,611.7831	18,286.9924	17,304.3924	16,917.6229	16,058.8224	14,180.724	16,441.7593	17,907.9411	17,927.5233	17,424.4142	16,786.3352	16,432.5919	16,149.1603	16,485.2181	16,243.7537	15,177.7201	16,227.8554	15,604.728		15,380.151	14,857.6224	13,683.1425	15,087.3096	14,791.0638	15,966.738	15,940.3524	15,399.5545	14,904.9227	14,808.0786	14,401.5198	14,346.9915	14,640.8928	15,201.2038	14,440.0596	14,297.1609	13,875.8204	13,579.4861	13,256.1965	13,230.7044	12,985.8568	12,869.7154	12,739.3407		12,605.7226	12,597.1533	12,145.4442	11,921.0671	11,692.9016	11,192.0343	11,439.536	11,421.5817	11,392.5207	10,957.6458	10,935.16	10,742.9652	10,676.794	9,974.5274	9,977.7406	10,574.4045	10,795.9966	10,736.4785	9,950.534	10,249.1933	10,907.6844	10,728.2506	10,910.7933	10,761.9405	10,713.4813	10,823.5111	10,231.1204	10,524.0202	10,524.1387	10,275.133	10,000
Russell 2500 Growth Index 452 [Member]
Account Value [Line Items]
Account Value	25,896.2783	25,480.0609	25,678.8142	24,204.6697	24,335.2077	23,386.8052	25,269.8333	24,605.9376	22,761.5874	23,288.4146	20,953.669	19,247.8226		20,683.4408	22,008.7799	22,942.7346	22,201.3119	20,576.9268		20,599.5155	20,862.9602	21,201.0069	21,541.5216	19,581.585	20,820.7972	20,218.9499	18,699.3733	20,461.7857	20,858.2091	18,722.174	20,114.1512	20,614.5915	23,272.0162	23,105.4685	23,036.1894		26,537.2003	26,407.8058	27,842.3583	26,484.4226	27,531.9742	26,859.9901	27,454.0778	26,055.8928	26,800.8006	25,891.2666	26,784.6666	25,968.988	25,262.836	23,261.6193	20,304.3825	20,067.4919	20,222.8453	19,351.8531	18,347.7442	17,696.2018	16,022.9423	13,808.8142	16,783.1069	18,004.3493	17,984.6195	17,819.1862	16,682.9543	16,265.5525	16,577.3348	17,062.034	16,799.8243	15,587.31	16,696.3052	16,131.6617		16,171.8137	15,172.0319	13,557.5089	15,207.8413	14,926.0048	16,963.5247	17,214.9293	16,125.5881	15,829.152	15,697.7623	14,904.7482	15,000.0019	14,878.445	15,382.9032	14,651.4962	14,612.0578	14,145.5599	13,776.9956	13,223.521	13,197.7486	13,024.4312	12,734.1543	12,728.316		12,508.3392	12,416.8331	12,051.3124	11,772.4747	11,668.1758	10,875.3738	11,474.5198	11,441.5829	11,362.6518	10,725.3879	10,805.4548	10,543.6262	10,443.495	9,697.0839	9,667.8382	10,728.7855	11,121.7296	10,875.4516	10,335.3979	10,932.9725	11,756.6519	11,618.9727	11,657.0691	11,308.2289	11,548.3692	11,362.1033	10,583.1968	10,748.8712	10,613.8136	10,440.1539	10,000
Russell 3000 Index 453 [Member]
Account Value [Line Items]
Account Value	33,431.7499	32,754.2021	32,056.3767	31,471.3556	30,526.3399	29,149.1283	30,490.7763	29,537.9574	28,021.1577	27,714.0123	26,318.0536	24,073.2616		24,728.7907	25,965.6445	26,476.7444	25,560.4836	23,926.6418		23,833.9098	23,582.6516	22,968.4935	23,518.1774	22,002.7861	23,371.2533	22,211.8772	20,528.4243	22,626.5647	23,503.707	21,487.7688	23,449.5237	23,481.0071	25,795.9975	24,985.5606	25,631.1915		27,233.5057	26,201.7175	26,606.7068	24,921.4084	26,092.107	25,368.648	24,946.7819	24,346.427	24,235.7902	23,047.7	22,250.1888	21,575.7888	21,672.1852	20,739.1715	18,489.825	18,897.6985	19,611.7831	18,286.9924	17,304.3924	16,917.6229	16,058.8224	14,180.724	16,441.7593	17,907.9411	17,927.5233	17,424.4142	16,786.3352	16,432.5919	16,149.1603	16,485.2181	16,243.7537	15,177.7201	16,227.8554	15,604.728		15,380.151	14,857.6224	13,683.1425	15,087.3096	14,791.0638	15,966.738	15,940.3524	15,399.5545	14,904.9227	14,808.0786	14,401.5198	14,346.9915	14,640.8928	15,201.2038	14,440.0596	14,297.1609	13,875.8204	13,579.4861	13,256.1965	13,230.7044	12,985.8568	12,869.7154	12,739.3407		12,605.7226	12,597.1533	12,145.4442	11,921.0671	11,692.9016	11,192.0343	11,439.536	11,421.5817	11,392.5207	10,957.6458	10,935.16	10,742.9652	10,676.794	9,974.5274	9,977.7406	10,574.4045	10,795.9966	10,736.4785	9,950.534	10,249.1933	10,907.6844	10,728.2506	10,910.7933	10,761.9405	10,713.4813	10,823.5111	10,231.1204	10,524.0202	10,524.1387	10,275.133	10,000
Russell 2500 Growth Index 466 [Member]
Account Value [Line Items]
Account Value	25,896.2783	25,480.0609	25,678.8142	24,204.6697	24,335.2077	23,386.8052	25,269.8333	24,605.9376	22,761.5874	23,288.4146	20,953.669	19,247.8226		20,683.4408	22,008.7799	22,942.7346	22,201.3119	20,576.9268		20,599.5155	20,862.9602	21,201.0069	21,541.5216	19,581.585	20,820.7972	20,218.9499	18,699.3733	20,461.7857	20,858.2091	18,722.174	20,114.1512	20,614.5915	23,272.0162	23,105.4685	23,036.1894		26,537.2003	26,407.8058	27,842.3583	26,484.4226	27,531.9742	26,859.9901	27,454.0778	26,055.8928	26,800.8006	25,891.2666	26,784.6666	25,968.988	25,262.836	23,261.6193	20,304.3825	20,067.4919	20,222.8453	19,351.8531	18,347.7442	17,696.2018	16,022.9423	13,808.8142	16,783.1069	18,004.3493	17,984.6195	17,819.1862	16,682.9543	16,265.5525	16,577.3348	17,062.034	16,799.8243	15,587.31	16,696.3052	16,131.6617		16,171.8137	15,172.0319	13,557.5089	15,207.8413	14,926.0048	16,963.5247	17,214.9293	16,125.5881	15,829.152	15,697.7623	14,904.7482	15,000.0019	14,878.445	15,382.9032	14,651.4962	14,612.0578	14,145.5599	13,776.9956	13,223.521	13,197.7486	13,024.4312	12,734.1543	12,728.316		12,508.3392	12,416.8331	12,051.3124	11,772.4747	11,668.1758	10,875.3738	11,474.5198	11,441.5829	11,362.6518	10,725.3879	10,805.4548	10,543.6262	10,443.495	9,697.0839	9,667.8382	10,728.7855	11,121.7296	10,875.4516	10,335.3979	10,932.9725	11,756.6519	11,618.9727	11,657.0691	11,308.2289	11,548.3692	11,362.1033	10,583.1968	10,748.8712	10,613.8136	10,440.1539	10,000
Russell 3000 Index 467 [Member]
Account Value [Line Items]
Account Value	33,431.7499	32,754.2021	32,056.3767	31,471.3556	30,526.3399	29,149.1283	30,490.7763	29,537.9574	28,021.1577	27,714.0123	26,318.0536	24,073.2616		24,728.7907	25,965.6445	26,476.7444	25,560.4836	23,926.6418		23,833.9098	23,582.6516	22,968.4935	23,518.1774	22,002.7861	23,371.2533	22,211.8772	20,528.4243	22,626.5647	23,503.707	21,487.7688	23,449.5237	23,481.0071	25,795.9975	24,985.5606	25,631.1915		27,233.5057	26,201.7175	26,606.7068	24,921.4084	26,092.107	25,368.648	24,946.7819	24,346.427	24,235.7902	23,047.7	22,250.1888	21,575.7888	21,672.1852	20,739.1715	18,489.825	18,897.6985	19,611.7831	18,286.9924	17,304.3924	16,917.6229	16,058.8224	14,180.724	16,441.7593	17,907.9411	17,927.5233	17,424.4142	16,786.3352	16,432.5919	16,149.1603	16,485.2181	16,243.7537	15,177.7201	16,227.8554	15,604.728		15,380.151	14,857.6224	13,683.1425	15,087.3096	14,791.0638	15,966.738	15,940.3524	15,399.5545	14,904.9227	14,808.0786	14,401.5198	14,346.9915	14,640.8928	15,201.2038	14,440.0596	14,297.1609	13,875.8204	13,579.4861	13,256.1965	13,230.7044	12,985.8568	12,869.7154	12,739.3407		12,605.7226	12,597.1533	12,145.4442	11,921.0671	11,692.9016	11,192.0343	11,439.536	11,421.5817	11,392.5207	10,957.6458	10,935.16	10,742.9652	10,676.794	9,974.5274	9,977.7406	10,574.4045	10,795.9966	10,736.4785	9,950.534	10,249.1933	10,907.6844	10,728.2506	10,910.7933	10,761.9405	10,713.4813	10,823.5111	10,231.1204	10,524.0202	10,524.1387	10,275.133	10,000
Russell 2500 Growth Index 479 [Member]
Account Value [Line Items]
Account Value	25,896.2783	25,480.0609	25,678.8142	24,204.6697	24,335.2077	23,386.8052	25,269.8333	24,605.9376	22,761.5874	23,288.4146	20,953.669	19,247.8226		20,683.4408	22,008.7799	22,942.7346	22,201.3119	20,576.9268		20,599.5155	20,862.9602	21,201.0069	21,541.5216	19,581.585	20,820.7972	20,218.9499	18,699.3733	20,461.7857	20,858.2091	18,722.174	20,114.1512	20,614.5915	23,272.0162	23,105.4685	23,036.1894		26,537.2003	26,407.8058	27,842.3583	26,484.4226	27,531.9742	26,859.9901	27,454.0778	26,055.8928	26,800.8006	25,891.2666	26,784.6666	25,968.988	25,262.836	23,261.6193	20,304.3825	20,067.4919	20,222.8453	19,351.8531	18,347.7442	17,696.2018	16,022.9423	13,808.8142	16,783.1069	18,004.3493	17,984.6195	17,819.1862	16,682.9543	16,265.5525	16,577.3348	17,062.034	16,799.8243	15,587.31	16,696.3052	16,131.6617		16,171.8137	15,172.0319	13,557.5089	15,207.8413	14,926.0048	16,963.5247	17,214.9293	16,125.5881	15,829.152	15,697.7623	14,904.7482	15,000.0019	14,878.445	15,382.9032	14,651.4962	14,612.0578	14,145.5599	13,776.9956	13,223.521	13,197.7486	13,024.4312	12,734.1543	12,728.316		12,508.3392	12,416.8331	12,051.3124	11,772.4747	11,668.1758	10,875.3738	11,474.5198	11,441.5829	11,362.6518	10,725.3879	10,805.4548	10,543.6262	10,443.495	9,697.0839	9,667.8382	10,728.7855	11,121.7296	10,875.4516	10,335.3979	10,932.9725	11,756.6519	11,618.9727	11,657.0691	11,308.2289	11,548.3692	11,362.1033	10,583.1968	10,748.8712	10,613.8136	10,440.1539	10,000
Russell 3000 Index 480 [Member]
Account Value [Line Items]
Account Value	33,431.7499	32,754.2021	32,056.3767	31,471.3556	30,526.3399	29,149.1283	30,490.7763	29,537.9574	28,021.1577	27,714.0123	26,318.0536	24,073.2616		24,728.7907	25,965.6445	26,476.7444	25,560.4836	23,926.6418		23,833.9098	23,582.6516	22,968.4935	23,518.1774	22,002.7861	23,371.2533	22,211.8772	20,528.4243	22,626.5647	23,503.707	21,487.7688	23,449.5237	23,481.0071	25,795.9975	24,985.5606	25,631.1915		27,233.5057	26,201.7175	26,606.7068	24,921.4084	26,092.107	25,368.648	24,946.7819	24,346.427	24,235.7902	23,047.7	22,250.1888	21,575.7888	21,672.1852	20,739.1715	18,489.825	18,897.6985	19,611.7831	18,286.9924	17,304.3924	16,917.6229	16,058.8224	14,180.724	16,441.7593	17,907.9411	17,927.5233	17,424.4142	16,786.3352	16,432.5919	16,149.1603	16,485.2181	16,243.7537	15,177.7201	16,227.8554	15,604.728		15,380.151	14,857.6224	13,683.1425	15,087.3096	14,791.0638	15,966.738	15,940.3524	15,399.5545	14,904.9227	14,808.0786	14,401.5198	14,346.9915	14,640.8928	15,201.2038	14,440.0596	14,297.1609	13,875.8204	13,579.4861	13,256.1965	13,230.7044	12,985.8568	12,869.7154	12,739.3407		12,605.7226	12,597.1533	12,145.4442	11,921.0671	11,692.9016	11,192.0343	11,439.536	11,421.5817	11,392.5207	10,957.6458	10,935.16	10,742.9652	10,676.794	9,974.5274	9,977.7406	10,574.4045	10,795.9966	10,736.4785	9,950.534	10,249.1933	10,907.6844	10,728.2506	10,910.7933	10,761.9405	10,713.4813	10,823.5111	10,231.1204	10,524.0202	10,524.1387	10,275.133	10,000
Russell 2500 Growth Index 492 [Member]
Account Value [Line Items]
Account Value	25,896.2783	25,480.0609	25,678.8142	24,204.6697	24,335.2077	23,386.8052	25,269.8333	24,605.9376	22,761.5874	23,288.4146	20,953.669	19,247.8226		20,683.4408	22,008.7799	22,942.7346	22,201.3119	20,576.9268		20,599.5155	20,862.9602	21,201.0069	21,541.5216	19,581.585	20,820.7972	20,218.9499	18,699.3733	20,461.7857	20,858.2091	18,722.174	20,114.1512	20,614.5915	23,272.0162	23,105.4685	23,036.1894		26,537.2003	26,407.8058	27,842.3583	26,484.4226	27,531.9742	26,859.9901	27,454.0778	26,055.8928	26,800.8006	25,891.2666	26,784.6666	25,968.988	25,262.836	23,261.6193	20,304.3825	20,067.4919	20,222.8453	19,351.8531	18,347.7442	17,696.2018	16,022.9423	13,808.8142	16,783.1069	18,004.3493	17,984.6195	17,819.1862	16,682.9543	16,265.5525	16,577.3348	17,062.034	16,799.8243	15,587.31	16,696.3052	16,131.6617		16,171.8137	15,172.0319	13,557.5089	15,207.8413	14,926.0048	16,963.5247	17,214.9293	16,125.5881	15,829.152	15,697.7623	14,904.7482	15,000.0019	14,878.445	15,382.9032	14,651.4962	14,612.0578	14,145.5599	13,776.9956	13,223.521	13,197.7486	13,024.4312	12,734.1543	12,728.316		12,508.3392	12,416.8331	12,051.3124	11,772.4747	11,668.1758	10,875.3738	11,474.5198	11,441.5829	11,362.6518	10,725.3879	10,805.4548	10,543.6262	10,443.495	9,697.0839	9,667.8382	10,728.7855	11,121.7296	10,875.4516	10,335.3979	10,932.9725	11,756.6519	11,618.9727	11,657.0691	11,308.2289	11,548.3692	11,362.1033	10,583.1968	10,748.8712	10,613.8136	10,440.1539	10,000
Russell 3000 Index 493 [Member]
Account Value [Line Items]
Account Value	33,431.7499	32,754.2021	32,056.3767	31,471.3556	30,526.3399	29,149.1283	30,490.7763	29,537.9574	28,021.1577	27,714.0123	26,318.0536	24,073.2616		24,728.7907	25,965.6445	26,476.7444	25,560.4836	23,926.6418		23,833.9098	23,582.6516	22,968.4935	23,518.1774	22,002.7861	23,371.2533	22,211.8772	20,528.4243	22,626.5647	23,503.707	21,487.7688	23,449.5237	23,481.0071	25,795.9975	24,985.5606	25,631.1915		27,233.5057	26,201.7175	26,606.7068	24,921.4084	26,092.107	25,368.648	24,946.7819	24,346.427	24,235.7902	23,047.7	22,250.1888	21,575.7888	21,672.1852	20,739.1715	18,489.825	18,897.6985	19,611.7831	18,286.9924	17,304.3924	16,917.6229	16,058.8224	14,180.724	16,441.7593	17,907.9411	17,927.5233	17,424.4142	16,786.3352	16,432.5919	16,149.1603	16,485.2181	16,243.7537	15,177.7201	16,227.8554	15,604.728		15,380.151	14,857.6224	13,683.1425	15,087.3096	14,791.0638	15,966.738	15,940.3524	15,399.5545	14,904.9227	14,808.0786	14,401.5198	14,346.9915	14,640.8928	15,201.2038	14,440.0596	14,297.1609	13,875.8204	13,579.4861	13,256.1965	13,230.7044	12,985.8568	12,869.7154	12,739.3407		12,605.7226	12,597.1533	12,145.4442	11,921.0671	11,692.9016	11,192.0343	11,439.536	11,421.5817	11,392.5207	10,957.6458	10,935.16	10,742.9652	10,676.794	9,974.5274	9,977.7406	10,574.4045	10,795.9966	10,736.4785	9,950.534	10,249.1933	10,907.6844	10,728.2506	10,910.7933	10,761.9405	10,713.4813	10,823.5111	10,231.1204	10,524.0202	10,524.1387	10,275.133	10,000
Russell 2500 Growth Index 505 [Member]
Account Value [Line Items]
Account Value	25,896.2783	25,480.0609	25,678.8142	24,204.6697	24,335.2077	23,386.8052	25,269.8333	24,605.9376	22,761.5874	23,288.4146	20,953.669	19,247.8226		20,683.4408	22,008.7799	22,942.7346	22,201.3119	20,576.9268		20,599.5155	20,862.9602	21,201.0069	21,541.5216	19,581.585	20,820.7972	20,218.9499	18,699.3733	20,461.7857	20,858.2091	18,722.174	20,114.1512	20,614.5915	23,272.0162	23,105.4685	23,036.1894		26,537.2003	26,407.8058	27,842.3583	26,484.4226	27,531.9742	26,859.9901	27,454.0778	26,055.8928	26,800.8006	25,891.2666	26,784.6666	25,968.988	25,262.836	23,261.6193	20,304.3825	20,067.4919	20,222.8453	19,351.8531	18,347.7442	17,696.2018	16,022.9423	13,808.8142	16,783.1069	18,004.3493	17,984.6195	17,819.1862	16,682.9543	16,265.5525	16,577.3348	17,062.034	16,799.8243	15,587.31	16,696.3052	16,131.6617		16,171.8137	15,172.0319	13,557.5089	15,207.8413	14,926.0048	16,963.5247	17,214.9293	16,125.5881	15,829.152	15,697.7623	14,904.7482	15,000.0019	14,878.445	15,382.9032	14,651.4962	14,612.0578	14,145.5599	13,776.9956	13,223.521	13,197.7486	13,024.4312	12,734.1543	12,728.316		12,508.3392	12,416.8331	12,051.3124	11,772.4747	11,668.1758	10,875.3738	11,474.5198	11,441.5829	11,362.6518	10,725.3879	10,805.4548	10,543.6262	10,443.495	9,697.0839	9,667.8382	10,728.7855	11,121.7296	10,875.4516	10,335.3979	10,932.9725	11,756.6519	11,618.9727	11,657.0691	11,308.2289	11,548.3692	11,362.1033	10,583.1968	10,748.8712	10,613.8136	10,440.1539	10,000
Russell 3000 Index 506 [Member]
Account Value [Line Items]
Account Value	33,431.7499	32,754.2021	32,056.3767	31,471.3556	30,526.3399	29,149.1283	30,490.7763	29,537.9574	28,021.1577	27,714.0123	26,318.0536	24,073.2616		24,728.7907	25,965.6445	26,476.7444	25,560.4836	23,926.6418		23,833.9098	23,582.6516	22,968.4935	23,518.1774	22,002.7861	23,371.2533	22,211.8772	20,528.4243	22,626.5647	23,503.707	21,487.7688	23,449.5237	23,481.0071	25,795.9975	24,985.5606	25,631.1915		27,233.5057	26,201.7175	26,606.7068	24,921.4084	26,092.107	25,368.648	24,946.7819	24,346.427	24,235.7902	23,047.7	22,250.1888	21,575.7888	21,672.1852	20,739.1715	18,489.825	18,897.6985	19,611.7831	18,286.9924	17,304.3924	16,917.6229	16,058.8224	14,180.724	16,441.7593	17,907.9411	17,927.5233	17,424.4142	16,786.3352	16,432.5919	16,149.1603	16,485.2181	16,243.7537	15,177.7201	16,227.8554	15,604.728		15,380.151	14,857.6224	13,683.1425	15,087.3096	14,791.0638	15,966.738	15,940.3524	15,399.5545	14,904.9227	14,808.0786	14,401.5198	14,346.9915	14,640.8928	15,201.2038	14,440.0596	14,297.1609	13,875.8204	13,579.4861	13,256.1965	13,230.7044	12,985.8568	12,869.7154	12,739.3407		12,605.7226	12,597.1533	12,145.4442	11,921.0671	11,692.9016	11,192.0343	11,439.536	11,421.5817	11,392.5207	10,957.6458	10,935.16	10,742.9652	10,676.794	9,974.5274	9,977.7406	10,574.4045	10,795.9966	10,736.4785	9,950.534	10,249.1933	10,907.6844	10,728.2506	10,910.7933	10,761.9405	10,713.4813	10,823.5111	10,231.1204	10,524.0202	10,524.1387	10,275.133	10,000
Thornburg Investment Income Builder Funds Blended Index 518 [Member]
Account Value [Line Items]
Account Value	21,899.9228	21,532.0945	21,039.4472	20,646.0169	20,288.3773	19,550.778	20,242.5314	19,721.6884	19,179.5571	19,021.4164	18,178.1255	16,806.1446		17,249.5813	17,944.1406	18,301.2193	17,854.4938	17,094.3629		17,270.692	17,021.1245	16,532.9814	16,948.0856	15,977.334	16,522.2059	15,567.2817	14,817.2114	16,114.7976	16,758.6665	15,726.1529	16,889.6563	16,852.9175	18,156.4024	17,912.1323	18,310.525		19,174.7125	18,590.6796	18,887.1147	18,118.6742	18,742.9043	18,408.0562	18,114.0665	17,882.752	17,677.3262	17,048.5724	16,684.314	16,427.9066	16,581.2227	16,064.8665	14,626.3723	14,987.9197	15,388.1891	14,682.0864	14,122.6145	13,826.5465	13,328.138	12,268.426	13,642.6234	14,496.3784	14,492.8117	14,176.7482	13,888.4201	13,618.2531	13,421.8997	13,541.921	13,484.4127	12,811.0541	13,328.7121	12,982.6158		12,795.1499	12,514.7251	11,795.1134	12,447.8246	12,324.4287	13,070.0277	13,036.5728	12,896.1549	12,600.2444	12,608.6325	12,527.4041	12,443.3	12,629.5108	13,066.4582	12,603.6423	12,462.9349	12,267.5162	12,094.3409	11,908.0687	11,868.9197	11,647.3279	11,616.7289	11,413.6778		11,266.8226	11,178.9791	10,933.1167	10,733.5596	10,540.6767	10,489.5834	10,664.7736	10,624.0038	10,620.4196	10,278.4873	10,318.8548	10,274.9142	10,144.7832	9,632.4537	9,669.277	10,087.1673	10,230.2994	10,275.4309	9,698.6094	9,957.2209	10,481.1738	10,324.242	10,536.7172	10,515.8799	10,343.2268	10,453.8199	10,036.3974	10,120.8813	10,242.3546	10,073.0867	10,000
M S C I World Net Total Return U S D Index 519 [Member]
Account Value [Line Items]
Account Value	26,113.5523	25,643.9116	24,983.5836	24,550.9362	24,061.3398	23,032.8744	23,921.4297	23,176.6516	22,233.9831	21,970.3293	20,942.1884	19,147.1067		19,719.2775	20,608.2862	21,112.5755	20,426.3955	19,261.5027		19,455.737	19,120.5636	18,547.4527	19,004.2874	17,748.4748	18,535.6335	17,330.6269	16,169.4523	17,826.6108	18,604.4217	17,235.9512	18,870.5558	18,856.2741	20,564.6499	20,015.3596	20,534.7085		21,681.917	20,793.2128	21,259.0619	20,119.4832	20,991.0431	20,481.2976	20,120.8745	19,825.3813	19,543.8431	18,674.719	18,073.3803	17,621.8329	17,798.7274	17,074.8119	15,139.1022	15,618.1907	16,176.2576	15,163.1429	14,470.8377	14,097.9331	13,448.2708	12,123.8144	13,973.0448	15,263.1682	15,356.6394	14,909.9637	14,505.9686	14,145.9899	13,851.2213	14,140.4582	14,070.7609	13,200.8901	14,009.2358	13,529.4894		13,354.0906	12,964.2573	12,028.3785	13,018.2615	12,872.0373	13,892.104	13,815.1792	13,646.3345	13,233.0206	13,239.3369	13,156.8892	13,007.4202	13,297.2527	13,871.9304	13,176.2249	13,000.4127	12,724.6997	12,488.6825	12,214.5364	12,197.361	11,912.2713	11,866.6147	11,620.783		11,451.2272	11,330.5349	11,024.6716	10,764.8605	10,513.2948	10,364.2659	10,568.8037	10,512.9592	10,504.2293	10,078.4316	10,192.6431	10,135.7163	9,977.8307	9,343.7725	9,413.8342	10,012.846	10,191.9941	10,242.9602	9,490.8635	9,854.3359	10,552.6529	10,366.5728	10,613.3579	10,576.9224	10,334.5512	10,498.8953	9,917.8235	10,100.8476	10,266.3941	10,064.69	10,000
Bloomberg U S Aggregate Total Return Value Index 520 [Member]
Account Value [Line Items]
Account Value	12,004.424	11,845.8158	11,678.0004	11,411.4668	11,304.4398	11,115.9877	11,404.0404	11,299.6979	11,461.6339	11,493.195	11,069.4673	10,589.8898		10,759.6881	11,040.24	11,111.2139	11,118.9646	11,158.7602		11,281.6023	11,213.6426	10,935.8444	11,226.0979	10,891.0465	10,940.3949	10,552.327	10,690.7981	11,173.5652	11,498.4738	11,224.2161	11,403.1101	11,330.0576	11,776.9683	12,113.503	12,250.172		12,519.9004	12,552.0197	12,514.9938	12,518.4439	12,627.7727	12,651.8595	12,511.9637	12,424.6696	12,384.2096	12,287.1394	12,442.5048	12,624.817	12,715.9864	12,698.4914	12,575.0965	12,631.4992	12,638.4313	12,741.2746	12,553.758	12,475.1769	12,417.3601	12,200.4833	12,272.7065	12,055.7234	11,828.0976	11,836.3427	11,842.3764	11,806.8123	11,870.0302	11,570.2238	11,544.8346	11,401.6482	11,202.782	11,199.9166		10,988.9087	10,995.2773	10,879.7393	10,683.4727	10,620.0741	10,704.6676	10,774.0467	10,705.1619	10,702.6209	10,715.7993	10,639.8655	10,719.5896	10,651.2843	10,753.2186	10,878.506	10,828.8068	10,842.724	10,836.4459	10,888.3034	10,791.5097	10,745.2712	10,756.0945	10,673.9358		10,592.197	10,597.7522	10,527.0016	10,506.3861	10,491.5864	10,745.7655	10,828.5941	10,834.9414	10,847.3436	10,779.1979	10,588.9383	10,586.2218	10,545.7404	10,449.8664	10,376.2558	10,235.4031	10,268.5908	10,295.7875	10,294.0811	10,224.9146	10,239.6187	10,168.9318	10,281.0356	10,305.856	10,342.967	10,295.1602	10,392.8789	10,179.4256	10,169.91	10,098.2769	10,000
Thornburg Investment Income Builder Funds Blended Index 540 [Member]
Account Value [Line Items]
Account Value	21,899.9228	21,532.0945	21,039.4472	20,646.0169	20,288.3773	19,550.778	20,242.5314	19,721.6884	19,179.5571	19,021.4164	18,178.1255	16,806.1446		17,249.5813	17,944.1406	18,301.2193	17,854.4938	17,094.3629		17,270.692	17,021.1245	16,532.9814	16,948.0856	15,977.334	16,522.2059	15,567.2817	14,817.2114	16,114.7976	16,758.6665	15,726.1529	16,889.6563	16,852.9175	18,156.4024	17,912.1323	18,310.525		19,174.7125	18,590.6796	18,887.1147	18,118.6742	18,742.9043	18,408.0562	18,114.0665	17,882.752	17,677.3262	17,048.5724	16,684.314	16,427.9066	16,581.2227	16,064.8665	14,626.3723	14,987.9197	15,388.1891	14,682.0864	14,122.6145	13,826.5465	13,328.138	12,268.426	13,642.6234	14,496.3784	14,492.8117	14,176.7482	13,888.4201	13,618.2531	13,421.8997	13,541.921	13,484.4127	12,811.0541	13,328.7121	12,982.6158		12,795.1499	12,514.7251	11,795.1134	12,447.8246	12,324.4287	13,070.0277	13,036.5728	12,896.1549	12,600.2444	12,608.6325	12,527.4041	12,443.3	12,629.5108	13,066.4582	12,603.6423	12,462.9349	12,267.5162	12,094.3409	11,908.0687	11,868.9197	11,647.3279	11,616.7289	11,413.6778		11,266.8226	11,178.9791	10,933.1167	10,733.5596	10,540.6767	10,489.5834	10,664.7736	10,624.0038	10,620.4196	10,278.4873	10,318.8548	10,274.9142	10,144.7832	9,632.4537	9,669.277	10,087.1673	10,230.2994	10,275.4309	9,698.6094	9,957.2209	10,481.1738	10,324.242	10,536.7172	10,515.8799	10,343.2268	10,453.8199	10,036.3974	10,120.8813	10,242.3546	10,073.0867	10,000
M S C I World Net Total Return U S D Index 541 [Member]
Account Value [Line Items]
Account Value	26,113.5523	25,643.9116	24,983.5836	24,550.9362	24,061.3398	23,032.8744	23,921.4297	23,176.6516	22,233.9831	21,970.3293	20,942.1884	19,147.1067		19,719.2775	20,608.2862	21,112.5755	20,426.3955	19,261.5027		19,455.737	19,120.5636	18,547.4527	19,004.2874	17,748.4748	18,535.6335	17,330.6269	16,169.4523	17,826.6108	18,604.4217	17,235.9512	18,870.5558	18,856.2741	20,564.6499	20,015.3596	20,534.7085		21,681.917	20,793.2128	21,259.0619	20,119.4832	20,991.0431	20,481.2976	20,120.8745	19,825.3813	19,543.8431	18,674.719	18,073.3803	17,621.8329	17,798.7274	17,074.8119	15,139.1022	15,618.1907	16,176.2576	15,163.1429	14,470.8377	14,097.9331	13,448.2708	12,123.8144	13,973.0448	15,263.1682	15,356.6394	14,909.9637	14,505.9686	14,145.9899	13,851.2213	14,140.4582	14,070.7609	13,200.8901	14,009.2358	13,529.4894		13,354.0906	12,964.2573	12,028.3785	13,018.2615	12,872.0373	13,892.104	13,815.1792	13,646.3345	13,233.0206	13,239.3369	13,156.8892	13,007.4202	13,297.2527	13,871.9304	13,176.2249	13,000.4127	12,724.6997	12,488.6825	12,214.5364	12,197.361	11,912.2713	11,866.6147	11,620.783		11,451.2272	11,330.5349	11,024.6716	10,764.8605	10,513.2948	10,364.2659	10,568.8037	10,512.9592	10,504.2293	10,078.4316	10,192.6431	10,135.7163	9,977.8307	9,343.7725	9,413.8342	10,012.846	10,191.9941	10,242.9602	9,490.8635	9,854.3359	10,552.6529	10,366.5728	10,613.3579	10,576.9224	10,334.5512	10,498.8953	9,917.8235	10,100.8476	10,266.3941	10,064.69	10,000
Bloomberg U S Aggregate Total Return Value Index 542 [Member]
Account Value [Line Items]
Account Value	12,004.424	11,845.8158	11,678.0004	11,411.4668	11,304.4398	11,115.9877	11,404.0404	11,299.6979	11,461.6339	11,493.195	11,069.4673	10,589.8898		10,759.6881	11,040.24	11,111.2139	11,118.9646	11,158.7602		11,281.6023	11,213.6426	10,935.8444	11,226.0979	10,891.0465	10,940.3949	10,552.327	10,690.7981	11,173.5652	11,498.4738	11,224.2161	11,403.1101	11,330.0576	11,776.9683	12,113.503	12,250.172		12,519.9004	12,552.0197	12,514.9938	12,518.4439	12,627.7727	12,651.8595	12,511.9637	12,424.6696	12,384.2096	12,287.1394	12,442.5048	12,624.817	12,715.9864	12,698.4914	12,575.0965	12,631.4992	12,638.4313	12,741.2746	12,553.758	12,475.1769	12,417.3601	12,200.4833	12,272.7065	12,055.7234	11,828.0976	11,836.3427	11,842.3764	11,806.8123	11,870.0302	11,570.2238	11,544.8346	11,401.6482	11,202.782	11,199.9166		10,988.9087	10,995.2773	10,879.7393	10,683.4727	10,620.0741	10,704.6676	10,774.0467	10,705.1619	10,702.6209	10,715.7993	10,639.8655	10,719.5896	10,651.2843	10,753.2186	10,878.506	10,828.8068	10,842.724	10,836.4459	10,888.3034	10,791.5097	10,745.2712	10,756.0945	10,673.9358		10,592.197	10,597.7522	10,527.0016	10,506.3861	10,491.5864	10,745.7655	10,828.5941	10,834.9414	10,847.3436	10,779.1979	10,588.9383	10,586.2218	10,545.7404	10,449.8664	10,376.2558	10,235.4031	10,268.5908	10,295.7875	10,294.0811	10,224.9146	10,239.6187	10,168.9318	10,281.0356	10,305.856	10,342.967	10,295.1602	10,392.8789	10,179.4256	10,169.91	10,098.2769	10,000
Thornburg Investment Income Builder Funds Blended Index 562 [Member]
Account Value [Line Items]
Account Value	21,899.9228	21,532.0945	21,039.4472	20,646.0169	20,288.3773	19,550.778	20,242.5314	19,721.6884	19,179.5571	19,021.4164	18,178.1255	16,806.1446		17,249.5813	17,944.1406	18,301.2193	17,854.4938	17,094.3629		17,270.692	17,021.1245	16,532.9814	16,948.0856	15,977.334	16,522.2059	15,567.2817	14,817.2114	16,114.7976	16,758.6665	15,726.1529	16,889.6563	16,852.9175	18,156.4024	17,912.1323	18,310.525		19,174.7125	18,590.6796	18,887.1147	18,118.6742	18,742.9043	18,408.0562	18,114.0665	17,882.752	17,677.3262	17,048.5724	16,684.314	16,427.9066	16,581.2227	16,064.8665	14,626.3723	14,987.9197	15,388.1891	14,682.0864	14,122.6145	13,826.5465	13,328.138	12,268.426	13,642.6234	14,496.3784	14,492.8117	14,176.7482	13,888.4201	13,618.2531	13,421.8997	13,541.921	13,484.4127	12,811.0541	13,328.7121	12,982.6158		12,795.1499	12,514.7251	11,795.1134	12,447.8246	12,324.4287	13,070.0277	13,036.5728	12,896.1549	12,600.2444	12,608.6325	12,527.4041	12,443.3	12,629.5108	13,066.4582	12,603.6423	12,462.9349	12,267.5162	12,094.3409	11,908.0687	11,868.9197	11,647.3279	11,616.7289	11,413.6778		11,266.8226	11,178.9791	10,933.1167	10,733.5596	10,540.6767	10,489.5834	10,664.7736	10,624.0038	10,620.4196	10,278.4873	10,318.8548	10,274.9142	10,144.7832	9,632.4537	9,669.277	10,087.1673	10,230.2994	10,275.4309	9,698.6094	9,957.2209	10,481.1738	10,324.242	10,536.7172	10,515.8799	10,343.2268	10,453.8199	10,036.3974	10,120.8813	10,242.3546	10,073.0867	10,000
M S C I World Net Total Return U S D Index 563 [Member]
Account Value [Line Items]
Account Value	26,113.5523	25,643.9116	24,983.5836	24,550.9362	24,061.3398	23,032.8744	23,921.4297	23,176.6516	22,233.9831	21,970.3293	20,942.1884	19,147.1067		19,719.2775	20,608.2862	21,112.5755	20,426.3955	19,261.5027		19,455.737	19,120.5636	18,547.4527	19,004.2874	17,748.4748	18,535.6335	17,330.6269	16,169.4523	17,826.6108	18,604.4217	17,235.9512	18,870.5558	18,856.2741	20,564.6499	20,015.3596	20,534.7085		21,681.917	20,793.2128	21,259.0619	20,119.4832	20,991.0431	20,481.2976	20,120.8745	19,825.3813	19,543.8431	18,674.719	18,073.3803	17,621.8329	17,798.7274	17,074.8119	15,139.1022	15,618.1907	16,176.2576	15,163.1429	14,470.8377	14,097.9331	13,448.2708	12,123.8144	13,973.0448	15,263.1682	15,356.6394	14,909.9637	14,505.9686	14,145.9899	13,851.2213	14,140.4582	14,070.7609	13,200.8901	14,009.2358	13,529.4894		13,354.0906	12,964.2573	12,028.3785	13,018.2615	12,872.0373	13,892.104	13,815.1792	13,646.3345	13,233.0206	13,239.3369	13,156.8892	13,007.4202	13,297.2527	13,871.9304	13,176.2249	13,000.4127	12,724.6997	12,488.6825	12,214.5364	12,197.361	11,912.2713	11,866.6147	11,620.783		11,451.2272	11,330.5349	11,024.6716	10,764.8605	10,513.2948	10,364.2659	10,568.8037	10,512.9592	10,504.2293	10,078.4316	10,192.6431	10,135.7163	9,977.8307	9,343.7725	9,413.8342	10,012.846	10,191.9941	10,242.9602	9,490.8635	9,854.3359	10,552.6529	10,366.5728	10,613.3579	10,576.9224	10,334.5512	10,498.8953	9,917.8235	10,100.8476	10,266.3941	10,064.69	10,000
Bloomberg U S Aggregate Total Return Value Index 564 [Member]
Account Value [Line Items]
Account Value	12,004.424	11,845.8158	11,678.0004	11,411.4668	11,304.4398	11,115.9877	11,404.0404	11,299.6979	11,461.6339	11,493.195	11,069.4673	10,589.8898		10,759.6881	11,040.24	11,111.2139	11,118.9646	11,158.7602		11,281.6023	11,213.6426	10,935.8444	11,226.0979	10,891.0465	10,940.3949	10,552.327	10,690.7981	11,173.5652	11,498.4738	11,224.2161	11,403.1101	11,330.0576	11,776.9683	12,113.503	12,250.172		12,519.9004	12,552.0197	12,514.9938	12,518.4439	12,627.7727	12,651.8595	12,511.9637	12,424.6696	12,384.2096	12,287.1394	12,442.5048	12,624.817	12,715.9864	12,698.4914	12,575.0965	12,631.4992	12,638.4313	12,741.2746	12,553.758	12,475.1769	12,417.3601	12,200.4833	12,272.7065	12,055.7234	11,828.0976	11,836.3427	11,842.3764	11,806.8123	11,870.0302	11,570.2238	11,544.8346	11,401.6482	11,202.782	11,199.9166		10,988.9087	10,995.2773	10,879.7393	10,683.4727	10,620.0741	10,704.6676	10,774.0467	10,705.1619	10,702.6209	10,715.7993	10,639.8655	10,719.5896	10,651.2843	10,753.2186	10,878.506	10,828.8068	10,842.724	10,836.4459	10,888.3034	10,791.5097	10,745.2712	10,756.0945	10,673.9358		10,592.197	10,597.7522	10,527.0016	10,506.3861	10,491.5864	10,745.7655	10,828.5941	10,834.9414	10,847.3436	10,779.1979	10,588.9383	10,586.2218	10,545.7404	10,449.8664	10,376.2558	10,235.4031	10,268.5908	10,295.7875	10,294.0811	10,224.9146	10,239.6187	10,168.9318	10,281.0356	10,305.856	10,342.967	10,295.1602	10,392.8789	10,179.4256	10,169.91	10,098.2769	10,000
Thornburg Investment Income Builder Funds Blended Index 583 [Member]
Account Value [Line Items]
Account Value	21,899.9228	21,532.0945	21,039.4472	20,646.0169	20,288.3773	19,550.778	20,242.5314	19,721.6884	19,179.5571	19,021.4164	18,178.1255	16,806.1446		17,249.5813	17,944.1406	18,301.2193	17,854.4938	17,094.3629		17,270.692	17,021.1245	16,532.9814	16,948.0856	15,977.334	16,522.2059	15,567.2817	14,817.2114	16,114.7976	16,758.6665	15,726.1529	16,889.6563	16,852.9175	18,156.4024	17,912.1323	18,310.525		19,174.7125	18,590.6796	18,887.1147	18,118.6742	18,742.9043	18,408.0562	18,114.0665	17,882.752	17,677.3262	17,048.5724	16,684.314	16,427.9066	16,581.2227	16,064.8665	14,626.3723	14,987.9197	15,388.1891	14,682.0864	14,122.6145	13,826.5465	13,328.138	12,268.426	13,642.6234	14,496.3784	14,492.8117	14,176.7482	13,888.4201	13,618.2531	13,421.8997	13,541.921	13,484.4127	12,811.0541	13,328.7121	12,982.6158		12,795.1499	12,514.7251	11,795.1134	12,447.8246	12,324.4287	13,070.0277	13,036.5728	12,896.1549	12,600.2444	12,608.6325	12,527.4041	12,443.3	12,629.5108	13,066.4582	12,603.6423	12,462.9349	12,267.5162	12,094.3409	11,908.0687	11,868.9197	11,647.3279	11,616.7289	11,413.6778		11,266.8226	11,178.9791	10,933.1167	10,733.5596	10,540.6767	10,489.5834	10,664.7736	10,624.0038	10,620.4196	10,278.4873	10,318.8548	10,274.9142	10,144.7832	9,632.4537	9,669.277	10,087.1673	10,230.2994	10,275.4309	9,698.6094	9,957.2209	10,481.1738	10,324.242	10,536.7172	10,515.8799	10,343.2268	10,453.8199	10,036.3974	10,120.8813	10,242.3546	10,073.0867	10,000
M S C I World Net Total Return U S D Index 584 [Member]
Account Value [Line Items]
Account Value	26,113.5523	25,643.9116	24,983.5836	24,550.9362	24,061.3398	23,032.8744	23,921.4297	23,176.6516	22,233.9831	21,970.3293	20,942.1884	19,147.1067		19,719.2775	20,608.2862	21,112.5755	20,426.3955	19,261.5027		19,455.737	19,120.5636	18,547.4527	19,004.2874	17,748.4748	18,535.6335	17,330.6269	16,169.4523	17,826.6108	18,604.4217	17,235.9512	18,870.5558	18,856.2741	20,564.6499	20,015.3596	20,534.7085		21,681.917	20,793.2128	21,259.0619	20,119.4832	20,991.0431	20,481.2976	20,120.8745	19,825.3813	19,543.8431	18,674.719	18,073.3803	17,621.8329	17,798.7274	17,074.8119	15,139.1022	15,618.1907	16,176.2576	15,163.1429	14,470.8377	14,097.9331	13,448.2708	12,123.8144	13,973.0448	15,263.1682	15,356.6394	14,909.9637	14,505.9686	14,145.9899	13,851.2213	14,140.4582	14,070.7609	13,200.8901	14,009.2358	13,529.4894		13,354.0906	12,964.2573	12,028.3785	13,018.2615	12,872.0373	13,892.104	13,815.1792	13,646.3345	13,233.0206	13,239.3369	13,156.8892	13,007.4202	13,297.2527	13,871.9304	13,176.2249	13,000.4127	12,724.6997	12,488.6825	12,214.5364	12,197.361	11,912.2713	11,866.6147	11,620.783		11,451.2272	11,330.5349	11,024.6716	10,764.8605	10,513.2948	10,364.2659	10,568.8037	10,512.9592	10,504.2293	10,078.4316	10,192.6431	10,135.7163	9,977.8307	9,343.7725	9,413.8342	10,012.846	10,191.9941	10,242.9602	9,490.8635	9,854.3359	10,552.6529	10,366.5728	10,613.3579	10,576.9224	10,334.5512	10,498.8953	9,917.8235	10,100.8476	10,266.3941	10,064.69	10,000
Bloomberg U S Aggregate Total Return Value Index 585 [Member]
Account Value [Line Items]
Account Value	12,004.424	11,845.8158	11,678.0004	11,411.4668	11,304.4398	11,115.9877	11,404.0404	11,299.6979	11,461.6339	11,493.195	11,069.4673	10,589.8898		10,759.6881	11,040.24	11,111.2139	11,118.9646	11,158.7602		11,281.6023	11,213.6426	10,935.8444	11,226.0979	10,891.0465	10,940.3949	10,552.327	10,690.7981	11,173.5652	11,498.4738	11,224.2161	11,403.1101	11,330.0576	11,776.9683	12,113.503	12,250.172		12,519.9004	12,552.0197	12,514.9938	12,518.4439	12,627.7727	12,651.8595	12,511.9637	12,424.6696	12,384.2096	12,287.1394	12,442.5048	12,624.817	12,715.9864	12,698.4914	12,575.0965	12,631.4992	12,638.4313	12,741.2746	12,553.758	12,475.1769	12,417.3601	12,200.4833	12,272.7065	12,055.7234	11,828.0976	11,836.3427	11,842.3764	11,806.8123	11,870.0302	11,570.2238	11,544.8346	11,401.6482	11,202.782	11,199.9166		10,988.9087	10,995.2773	10,879.7393	10,683.4727	10,620.0741	10,704.6676	10,774.0467	10,705.1619	10,702.6209	10,715.7993	10,639.8655	10,719.5896	10,651.2843	10,753.2186	10,878.506	10,828.8068	10,842.724	10,836.4459	10,888.3034	10,791.5097	10,745.2712	10,756.0945	10,673.9358		10,592.197	10,597.7522	10,527.0016	10,506.3861	10,491.5864	10,745.7655	10,828.5941	10,834.9414	10,847.3436	10,779.1979	10,588.9383	10,586.2218	10,545.7404	10,449.8664	10,376.2558	10,235.4031	10,268.5908	10,295.7875	10,294.0811	10,224.9146	10,239.6187	10,168.9318	10,281.0356	10,305.856	10,342.967	10,295.1602	10,392.8789	10,179.4256	10,169.91	10,098.2769	10,000
Thornburg Investment Income Builder Funds Blended Index 604 [Member]
Account Value [Line Items]
Account Value	21,899.9228	21,532.0945	21,039.4472	20,646.0169	20,288.3773	19,550.778	20,242.5314	19,721.6884	19,179.5571	19,021.4164	18,178.1255	16,806.1446		17,249.5813	17,944.1406	18,301.2193	17,854.4938	17,094.3629		17,270.692	17,021.1245	16,532.9814	16,948.0856	15,977.334	16,522.2059	15,567.2817	14,817.2114	16,114.7976	16,758.6665	15,726.1529	16,889.6563	16,852.9175	18,156.4024	17,912.1323	18,310.525		19,174.7125	18,590.6796	18,887.1147	18,118.6742	18,742.9043	18,408.0562	18,114.0665	17,882.752	17,677.3262	17,048.5724	16,684.314	16,427.9066	16,581.2227	16,064.8665	14,626.3723	14,987.9197	15,388.1891	14,682.0864	14,122.6145	13,826.5465	13,328.138	12,268.426	13,642.6234	14,496.3784	14,492.8117	14,176.7482	13,888.4201	13,618.2531	13,421.8997	13,541.921	13,484.4127	12,811.0541	13,328.7121	12,982.6158		12,795.1499	12,514.7251	11,795.1134	12,447.8246	12,324.4287	13,070.0277	13,036.5728	12,896.1549	12,600.2444	12,608.6325	12,527.4041	12,443.3	12,629.5108	13,066.4582	12,603.6423	12,462.9349	12,267.5162	12,094.3409	11,908.0687	11,868.9197	11,647.3279	11,616.7289	11,413.6778		11,266.8226	11,178.9791	10,933.1167	10,733.5596	10,540.6767	10,489.5834	10,664.7736	10,624.0038	10,620.4196	10,278.4873	10,318.8548	10,274.9142	10,144.7832	9,632.4537	9,669.277	10,087.1673	10,230.2994	10,275.4309	9,698.6094	9,957.2209	10,481.1738	10,324.242	10,536.7172	10,515.8799	10,343.2268	10,453.8199	10,036.3974	10,120.8813	10,242.3546	10,073.0867	10,000
M S C I World Net Total Return U S D Index 605 [Member]
Account Value [Line Items]
Account Value	26,113.5523	25,643.9116	24,983.5836	24,550.9362	24,061.3398	23,032.8744	23,921.4297	23,176.6516	22,233.9831	21,970.3293	20,942.1884	19,147.1067		19,719.2775	20,608.2862	21,112.5755	20,426.3955	19,261.5027		19,455.737	19,120.5636	18,547.4527	19,004.2874	17,748.4748	18,535.6335	17,330.6269	16,169.4523	17,826.6108	18,604.4217	17,235.9512	18,870.5558	18,856.2741	20,564.6499	20,015.3596	20,534.7085		21,681.917	20,793.2128	21,259.0619	20,119.4832	20,991.0431	20,481.2976	20,120.8745	19,825.3813	19,543.8431	18,674.719	18,073.3803	17,621.8329	17,798.7274	17,074.8119	15,139.1022	15,618.1907	16,176.2576	15,163.1429	14,470.8377	14,097.9331	13,448.2708	12,123.8144	13,973.0448	15,263.1682	15,356.6394	14,909.9637	14,505.9686	14,145.9899	13,851.2213	14,140.4582	14,070.7609	13,200.8901	14,009.2358	13,529.4894		13,354.0906	12,964.2573	12,028.3785	13,018.2615	12,872.0373	13,892.104	13,815.1792	13,646.3345	13,233.0206	13,239.3369	13,156.8892	13,007.4202	13,297.2527	13,871.9304	13,176.2249	13,000.4127	12,724.6997	12,488.6825	12,214.5364	12,197.361	11,912.2713	11,866.6147	11,620.783		11,451.2272	11,330.5349	11,024.6716	10,764.8605	10,513.2948	10,364.2659	10,568.8037	10,512.9592	10,504.2293	10,078.4316	10,192.6431	10,135.7163	9,977.8307	9,343.7725	9,413.8342	10,012.846	10,191.9941	10,242.9602	9,490.8635	9,854.3359	10,552.6529	10,366.5728	10,613.3579	10,576.9224	10,334.5512	10,498.8953	9,917.8235	10,100.8476	10,266.3941	10,064.69	10,000
Bloomberg U S Aggregate Total Return Value Index 606 [Member]
Account Value [Line Items]
Account Value	12,004.424	11,845.8158	11,678.0004	11,411.4668	11,304.4398	11,115.9877	11,404.0404	11,299.6979	11,461.6339	11,493.195	11,069.4673	10,589.8898		10,759.6881	11,040.24	11,111.2139	11,118.9646	11,158.7602		11,281.6023	11,213.6426	10,935.8444	11,226.0979	10,891.0465	10,940.3949	10,552.327	10,690.7981	11,173.5652	11,498.4738	11,224.2161	11,403.1101	11,330.0576	11,776.9683	12,113.503	12,250.172		12,519.9004	12,552.0197	12,514.9938	12,518.4439	12,627.7727	12,651.8595	12,511.9637	12,424.6696	12,384.2096	12,287.1394	12,442.5048	12,624.817	12,715.9864	12,698.4914	12,575.0965	12,631.4992	12,638.4313	12,741.2746	12,553.758	12,475.1769	12,417.3601	12,200.4833	12,272.7065	12,055.7234	11,828.0976	11,836.3427	11,842.3764	11,806.8123	11,870.0302	11,570.2238	11,544.8346	11,401.6482	11,202.782	11,199.9166		10,988.9087	10,995.2773	10,879.7393	10,683.4727	10,620.0741	10,704.6676	10,774.0467	10,705.1619	10,702.6209	10,715.7993	10,639.8655	10,719.5896	10,651.2843	10,753.2186	10,878.506	10,828.8068	10,842.724	10,836.4459	10,888.3034	10,791.5097	10,745.2712	10,756.0945	10,673.9358		10,592.197	10,597.7522	10,527.0016	10,506.3861	10,491.5864	10,745.7655	10,828.5941	10,834.9414	10,847.3436	10,779.1979	10,588.9383	10,586.2218	10,545.7404	10,449.8664	10,376.2558	10,235.4031	10,268.5908	10,295.7875	10,294.0811	10,224.9146	10,239.6187	10,168.9318	10,281.0356	10,305.856	10,342.967	10,295.1602	10,392.8789	10,179.4256	10,169.91	10,098.2769	10,000
Thornburg Investment Income Builder Funds Blended Index 625 [Member]
Account Value [Line Items]
Account Value	21,899.9228	21,532.0945	21,039.4472	20,646.0169	20,288.3773	19,550.778	20,242.5314	19,721.6884	19,179.5571	19,021.4164	18,178.1255	16,806.1446		17,249.5813	17,944.1406	18,301.2193	17,854.4938	17,094.3629		17,270.692	17,021.1245	16,532.9814	16,948.0856	15,977.334	16,522.2059	15,567.2817	14,817.2114	16,114.7976	16,758.6665	15,726.1529	16,889.6563	16,852.9175	18,156.4024	17,912.1323	18,310.525		19,174.7125	18,590.6796	18,887.1147	18,118.6742	18,742.9043	18,408.0562	18,114.0665	17,882.752	17,677.3262	17,048.5724	16,684.314	16,427.9066	16,581.2227	16,064.8665	14,626.3723	14,987.9197	15,388.1891	14,682.0864	14,122.6145	13,826.5465	13,328.138	12,268.426	13,642.6234	14,496.3784	14,492.8117	14,176.7482	13,888.4201	13,618.2531	13,421.8997	13,541.921	13,484.4127	12,811.0541	13,328.7121	12,982.6158		12,795.1499	12,514.7251	11,795.1134	12,447.8246	12,324.4287	13,070.0277	13,036.5728	12,896.1549	12,600.2444	12,608.6325	12,527.4041	12,443.3	12,629.5108	13,066.4582	12,603.6423	12,462.9349	12,267.5162	12,094.3409	11,908.0687	11,868.9197	11,647.3279	11,616.7289	11,413.6778		11,266.8226	11,178.9791	10,933.1167	10,733.5596	10,540.6767	10,489.5834	10,664.7736	10,624.0038	10,620.4196	10,278.4873	10,318.8548	10,274.9142	10,144.7832	9,632.4537	9,669.277	10,087.1673	10,230.2994	10,275.4309	9,698.6094	9,957.2209	10,481.1738	10,324.242	10,536.7172	10,515.8799	10,343.2268	10,453.8199	10,036.3974	10,120.8813	10,242.3546	10,073.0867	10,000
M S C I World Net Total Return U S D Index 626 [Member]
Account Value [Line Items]
Account Value	26,113.5523	25,643.9116	24,983.5836	24,550.9362	24,061.3398	23,032.8744	23,921.4297	23,176.6516	22,233.9831	21,970.3293	20,942.1884	19,147.1067		19,719.2775	20,608.2862	21,112.5755	20,426.3955	19,261.5027		19,455.737	19,120.5636	18,547.4527	19,004.2874	17,748.4748	18,535.6335	17,330.6269	16,169.4523	17,826.6108	18,604.4217	17,235.9512	18,870.5558	18,856.2741	20,564.6499	20,015.3596	20,534.7085		21,681.917	20,793.2128	21,259.0619	20,119.4832	20,991.0431	20,481.2976	20,120.8745	19,825.3813	19,543.8431	18,674.719	18,073.3803	17,621.8329	17,798.7274	17,074.8119	15,139.1022	15,618.1907	16,176.2576	15,163.1429	14,470.8377	14,097.9331	13,448.2708	12,123.8144	13,973.0448	15,263.1682	15,356.6394	14,909.9637	14,505.9686	14,145.9899	13,851.2213	14,140.4582	14,070.7609	13,200.8901	14,009.2358	13,529.4894		13,354.0906	12,964.2573	12,028.3785	13,018.2615	12,872.0373	13,892.104	13,815.1792	13,646.3345	13,233.0206	13,239.3369	13,156.8892	13,007.4202	13,297.2527	13,871.9304	13,176.2249	13,000.4127	12,724.6997	12,488.6825	12,214.5364	12,197.361	11,912.2713	11,866.6147	11,620.783		11,451.2272	11,330.5349	11,024.6716	10,764.8605	10,513.2948	10,364.2659	10,568.8037	10,512.9592	10,504.2293	10,078.4316	10,192.6431	10,135.7163	9,977.8307	9,343.7725	9,413.8342	10,012.846	10,191.9941	10,242.9602	9,490.8635	9,854.3359	10,552.6529	10,366.5728	10,613.3579	10,576.9224	10,334.5512	10,498.8953	9,917.8235	10,100.8476	10,266.3941	10,064.69	10,000
Bloomberg U S Aggregate Total Return Value Index 627 [Member]
Account Value [Line Items]
Account Value	12,004.424	11,845.8158	11,678.0004	11,411.4668	11,304.4398	11,115.9877	11,404.0404	11,299.6979	11,461.6339	11,493.195	11,069.4673	10,589.8898		10,759.6881	11,040.24	11,111.2139	11,118.9646	11,158.7602		11,281.6023	11,213.6426	10,935.8444	11,226.0979	10,891.0465	10,940.3949	10,552.327	10,690.7981	11,173.5652	11,498.4738	11,224.2161	11,403.1101	11,330.0576	11,776.9683	12,113.503	12,250.172		12,519.9004	12,552.0197	12,514.9938	12,518.4439	12,627.7727	12,651.8595	12,511.9637	12,424.6696	12,384.2096	12,287.1394	12,442.5048	12,624.817	12,715.9864	12,698.4914	12,575.0965	12,631.4992	12,638.4313	12,741.2746	12,553.758	12,475.1769	12,417.3601	12,200.4833	12,272.7065	12,055.7234	11,828.0976	11,836.3427	11,842.3764	11,806.8123	11,870.0302	11,570.2238	11,544.8346	11,401.6482	11,202.782	11,199.9166		10,988.9087	10,995.2773	10,879.7393	10,683.4727	10,620.0741	10,704.6676	10,774.0467	10,705.1619	10,702.6209	10,715.7993	10,639.8655	10,719.5896	10,651.2843	10,753.2186	10,878.506	10,828.8068	10,842.724	10,836.4459	10,888.3034	10,791.5097	10,745.2712	10,756.0945	10,673.9358		10,592.197	10,597.7522	10,527.0016	10,506.3861	10,491.5864	10,745.7655	10,828.5941	10,834.9414	10,847.3436	10,779.1979	10,588.9383	10,586.2218	10,545.7404	10,449.8664	10,376.2558	10,235.4031	10,268.5908	10,295.7875	10,294.0811	10,224.9146	10,239.6187	10,168.9318	10,281.0356	10,305.856	10,342.967	10,295.1602	10,392.8789	10,179.4256	10,169.91	10,098.2769	10,000
Thornburg Investment Income Builder Funds Blended Index 646 [Member]
Account Value [Line Items]
Account Value	19,471.1103	19,144.076	18,706.0658	18,356.2689	18,038.2933	17,382.4976	17,997.532	17,534.4531	17,052.4469	16,911.8449	16,162.0792	14,942.2579		15,336.5152	15,954.0444	16,271.5212	15,874.3399	15,198.5114		15,355.2846	15,133.3954	14,699.3899	15,068.457	14,205.3666	14,689.8094	13,840.7912	13,173.9075	14,327.5848	14,900.0454	13,982.0427	15,016.5077	14,983.8435	16,142.7653	15,925.586	16,279.7949		17,048.1397	16,528.879	16,792.4379	16,109.2214	16,664.2212	16,366.5094	16,105.1246	15,899.4641	15,716.821	15,157.7992	14,833.939	14,605.9684	14,742.281	14,283.1914	13,004.2334	13,325.6834	13,681.5609	13,053.7686	12,556.3449	12,293.1124	11,849.9799	10,907.7954	12,129.5873	12,888.6565	12,885.4854	12,604.4749	12,348.1238	12,107.9198	11,933.3429	12,040.0533	11,988.9229	11,390.2432	11,850.4903	11,542.7779		11,376.1029	11,126.7786	10,486.9755	11,067.2977	10,957.587	11,620.4953	11,590.7507	11,465.9059	11,202.8134	11,210.2712	11,138.0515	11,063.275	11,228.834	11,617.3217	11,205.8345	11,080.7322	10,906.9864	10,753.0171	10,587.4035	10,552.5963	10,355.5801	10,328.3747	10,147.8431	10,000
M S C I World Net Total Return U S D Index 647 [Member]
Account Value [Line Items]
Account Value	22,874.8572	22,463.463	21,885.0312	21,506.0423	21,077.1674	20,176.2559	20,954.6094	20,302.2014	19,476.446	19,245.4914	18,344.8642	16,772.4149		17,273.623	18,052.3737	18,494.1193	17,893.0417	16,872.623		17,042.7678	16,749.1637	16,247.132	16,647.3085	15,547.2462	16,236.7787	15,181.2213	14,164.0597	15,615.6915	16,297.0356	15,098.2876	16,530.1628	16,517.6524	18,014.1493	17,532.984	17,987.9214		18,992.849	18,214.365	18,622.4379	17,624.1938	18,387.6598	17,941.1347	17,625.4125	17,366.5674	17,119.9466	16,358.6144	15,831.8558	15,436.3109	15,591.2664	14,957.1333	13,261.4973	13,681.1675	14,170.0209	13,282.5563	12,676.1133	12,349.4576	11,780.3687	10,620.1761	12,240.0584	13,370.1761	13,452.0547	13,060.7773	12,706.8871	12,391.5543	12,133.3439	12,386.7086	12,325.6554	11,563.669	12,271.7608	11,851.5143		11,697.8691	11,356.3843	10,536.5765	11,403.6907	11,275.6018	12,169.1561	12,101.7718	11,953.8679	11,591.8146	11,597.3475	11,525.1253	11,394.194	11,648.0804	12,151.4846	11,542.0629	11,388.0556	11,146.5375	10,939.792	10,699.6464	10,684.6012	10,434.8693	10,394.8752	10,179.5324	10,000
Bloomberg U S Aggregate Total Return Value Index 648 [Member]
Account Value [Line Items]
Account Value	11,305.8365	11,156.4585	10,998.4089	10,747.386	10,646.5874	10,469.102	10,740.3918	10,642.1215	10,794.6337	10,824.3581	10,425.2889	9,973.62		10,133.5371	10,397.7624	10,464.6061	10,471.9057	10,509.3854		10,625.0789	10,561.074	10,299.4421	10,572.8045	10,257.2511	10,303.7277	9,938.2431	10,068.656	10,523.3289	10,829.3297	10,571.0322	10,739.5156	10,670.7144	11,091.6175	11,408.5678	11,537.2834		11,791.3153	11,821.5654	11,786.6942	11,789.9435	11,892.91	11,915.5951	11,783.8404	11,701.6264	11,663.5208	11,572.0996	11,718.4236	11,890.1263	11,975.9902	11,959.5133	11,843.2992	11,896.4197	11,902.9483	11,999.8067	11,823.2026	11,749.1944	11,694.7422	11,490.4864	11,558.5066	11,354.1506	11,139.7713	11,147.5366	11,153.2192	11,119.7248	11,179.2637	10,896.9043	10,872.9926	10,738.1388	10,550.8454	10,548.1468		10,349.4183	10,355.4163	10,246.602	10,061.7569	10,002.0477	10,081.7184	10,147.06	10,082.184	10,079.7908	10,092.2023	10,020.6874	10,095.772	10,031.4417	10,127.444	10,245.4405	10,198.6334	10,211.7408	10,205.8279	10,254.6677	10,163.5068	10,119.9591	10,130.1526	10,052.775	10,000
Thornburg Summit Funds Blended Index 667 [Member]
Account Value [Line Items]
Account Value	11,285.5211	11,056.1505	10,789.616	10,570.5838	10,425.2753	10,125.4526	10,437.4411	10,222.3619	10,014.8379	10,034.9351	9,598.7274	8,924.4894		9,132.916	9,478.8522	9,694.4408	9,460.4373	9,142.2328		9,274.3607	9,179.0061	8,901.7208	9,181.7092	8,693.6762	8,884.2103	8,339.1523	8,069.1688	8,751.7128	9,096.2327	8,659.7542	9,246.0653	9,229.498	9,923.5679	9,915.4874	10,120.4367	10,000.0105
M S C I All Country World Net Total Return U S D Index 668 [Member]
Account Value [Line Items]
Account Value	12,738.8901	12,449.6717	12,141.3121	11,948.6289	11,688.288	11,232.1106	11,615.3472	11,261.7626	10,798.3658	10,735.4381	10,243.4126	9,377.8594		9,668.5716	10,085.6093	10,375.547	10,009.128	9,459.8729		9,562.2998	9,426.8185	9,144.8471	9,414.6756	8,785.0113	9,144.8471	8,486.6095	8,003.6014	8,850.8987	9,189.2146	8,589.3961	9,380.0999	9,369.1187	10,184.3021	9,968.384	10,232.6804	10,000
Bloomberg Global Aggregate Total Return Index 669 [Member]
Account Value [Line Items]
Account Value	9,319.3357	9,163.3894	8,951.5872	8,711.046	8,698.5657	8,586.0333	8,808.3311	8,760.1084	8,871.5913	8,995.7262	8,636.775	8,222.1586		8,321.6192	8,572.0454	8,690.9325	8,631.1646	8,631.8325		8,803.942	8,765.2608	8,496.5722	8,788.752	8,509.3959	8,463.6349	8,083.2344	8,139.2048	8,580.0412	8,932.5424	8,746.5976	9,036.5447	9,011.9468	9,534.3248	9,833.7943	9,952.0707	$ 10,000.0263
Thornburg Summit Funds Blended Index 688 [Member]
Account Value [Line Items]
Account Value	14,752.7715	14,452.9315	14,104.5096	13,818.184	13,628.2324	13,236.2952	13,644.136	13,362.978	13,091.6964	13,117.968	12,547.7442	11,666.3601		11,938.8216	12,391.0399	12,672.8637	12,366.9673	11,951.0008		12,123.7224	11,999.0719	11,636.5964	12,002.6055	11,364.6342	11,613.706	10,901.1899	10,548.2594	11,440.5014	11,890.8682	11,320.2904	12,086.7338	12,065.0766	12,972.3854	12,961.8224	13,229.7383		13,747.5461	13,432.644	13,645.7809	13,252.705	13,689.3108	13,508.9099	13,382.3212	13,323.9939	13,151.8036	12,752.8039	12,647.4249	12,559.3689	12,638.357	12,231.8937	11,312.9375	11,475.9284	11,719.5207	11,311.0289	10,829.2437	10,588.6117	10,301.7217	9,608.6507	10,558.5462	11,065.0217	11,081.869	10,827.8471	10,703.5226	10,503.0742	10,413.9875	10,477.8874	10,471.1288	9,990.0287	10,300.8625	10,108.0383	10,000.0699
M S C I All Country World Net Total Return U S D Index 689 [Member]
Account Value [Line Items]
Account Value	18,557.4521	18,136.1314	17,686.9268	17,406.2344	17,026.9813	16,362.4422	16,920.7243	16,405.638	15,730.582	15,638.9117	14,922.1508	13,661.2511		14,084.7477	14,692.2699	15,114.6382	14,580.8552	13,780.7247		13,929.9357	13,732.5726	13,321.8091	13,714.8832	12,797.6162	13,321.8091	12,362.9177	11,659.2927	12,893.598	13,386.4417	12,512.6525	13,664.5149	13,648.518	14,836.0411	14,521.5012	14,906.5164		15,676.426	15,073.4571	15,445.4169	14,695.292	15,328.5222	14,954.2253	14,851.8769	14,658.7044	14,434.1022	13,829.4409	13,469.6501	13,164.7406	13,224.8602	12,638.0897	11,251.229	11,531.5588	11,915.7681	11,228.5028	10,664.4988	10,334.2843	9,903.5749	8,945.2879	10,341.4164	11,250.1007	11,375.7394	10,988.79	10,726.9152	10,441.1457	10,226.0126	10,474.4693	10,443.8857	9,802.0325	10,420.1522	10,079.7834	10,000
Bloomberg Global Aggregate Total Return Index 690 [Member]
Account Value [Line Items]
Account Value	10,127.5682	9,958.0973	9,727.9262	9,466.5237	9,452.9611	9,330.6691	9,572.246	9,519.8411	9,640.9925	9,775.8932	9,385.8114	8,935.2369		9,043.3233	9,315.4681	9,444.6659	9,379.7144	9,380.4403		9,567.4763	9,525.4404	9,233.4493	9,550.9689	9,247.3853	9,197.6555	8,784.2643	8,845.0888	9,324.1573	9,707.2297	9,505.1586	9,820.2518	9,793.5205	10,361.2025	10,686.6439	10,815.1781		11,041.4711	11,056.9002	11,089.3344	11,116.2109	11,317.3073	11,364.5692	11,215.2763	11,315.109	11,209.8429	11,069.9859	11,287.1127	11,484.8081	11,586.8391	11,433.2742	11,229.1085	11,218.3663	11,258.8676	11,276.0594	10,927.5366	10,831.3122	10,784.0089	10,576.3593	10,818.7657	10,746.4938	10,611.0332	10,549.5243	10,630.1122	10,559.8103	10,668.3116	10,455.7056	10,484.8425	10,257.4088	10,120.3721	10,150.4215	$ 10,000.1747
I C E Bof A U S Treasury Bill Index 708 [Member]
Account Value [Line Items]
Account Value	11,797.7866	11,744.6572	11,686.08	11,631.3422	11,583.4012	11,527.4701	11,479.7885	11,428.0081	11,383.3358	11,335.0836	11,280.6052	11,228.1503		11,178.0302	11,127.495	11,077.323	11,032.08	10,982.79		10,943.2543	10,906.6241	10,856.4521	10,821.067	10,785.8377	10,744.0191	10,709.6717	10,693.4839	10,673.0934	10,656.231	10,648.6041	10,649.071	10,642.378	10,640.7177	10,640.9252	10,640.6658		10,643.5713	10,643.2081	10,642.7411	10,642.8449	10,642.3261	10,641.8072	10,641.2884	10,641.7553	10,641.4959	10,641.0809	10,640.0951	10,639.0574	10,638.2272	10,637.0858	10,636.0481	10,634.9585	10,633.6614	10,632.9869	10,630.4446	10,628.8362	10,628.8362	10,628.5768	10,593.97	10,574.6691	10,559.9859	10,544.4725	10,531.709	10,509.8658	10,492.3808	10,470.0187	10,451.3923	10,426.8511	10,402.258	10,381.9713		10,358.4159	10,339.4781	10,317.5311	10,297.0369	10,276.4389	10,257.9162	10,242.8698	10,223.9321	10,207.5367	10,191.0375	10,175.2647	10,161.5673	10,147.2992	10,138.6345	10,127.5313	10,117.829	10,110.6171	10,102.4712	10,094.1698	10,083.7411	10,075.8547	10,067.8126	10,063.143		10,056.5019	10,055.568	10,051.3653	10,045.9175	10,041.8705	10,040.9366	10,038.6018	10,033.7766	10,032.0125	10,029.7815	10,023.1403	10,022.9847	10,019.716	10,014.2681	10,011.5183	10,008.8722	10,007.0044	10,007.9383	10,009.2873	10,005.3441	10,004.8252	10,005.1884	10,004.462	10,003.9951	10,002.2829	10,002.231	10,002.0235	10,000.3113	10,000.3113	10,000.1038	10,000
Bloomberg U S Aggregate Total Return Value Index 709 [Member]
Account Value [Line Items]
Account Value	12,004.424	11,845.8158	11,678.0004	11,411.4668	11,304.4398	11,115.9877	11,404.0404	11,299.6979	11,461.6339	11,493.195	11,069.4673	10,589.8898		10,759.6881	11,040.24	11,111.2139	11,118.9646	11,158.7602		11,281.6023	11,213.6426	10,935.8444	11,226.0979	10,891.0465	10,940.3949	10,552.327	10,690.7981	11,173.5652	11,498.4738	11,224.2161	11,403.1101	11,330.0576	11,776.9683	12,113.503	12,250.172		12,519.9004	12,552.0197	12,514.9938	12,518.4439	12,627.7727	12,651.8595	12,511.9637	12,424.6696	12,384.2096	12,287.1394	12,442.5048	12,624.817	12,715.9864	12,698.4914	12,575.0965	12,631.4992	12,638.4313	12,741.2746	12,553.758	12,475.1769	12,417.3601	12,200.4833	12,272.7065	12,055.7234	11,828.0976	11,836.3427	11,842.3764	11,806.8123	11,870.0302	11,570.2238	11,544.8346	11,401.6482	11,202.782	11,199.9166		10,988.9087	10,995.2773	10,879.7393	10,683.4727	10,620.0741	10,704.6676	10,774.0467	10,705.1619	10,702.6209	10,715.7993	10,639.8655	10,719.5896	10,651.2843	10,753.2186	10,878.506	10,828.8068	10,842.724	10,836.4459	10,888.3034	10,791.5097	10,745.2712	10,756.0945	10,673.9358		10,592.197	10,597.7522	10,527.0016	10,506.3861	10,491.5864	10,745.7655	10,828.5941	10,834.9414	10,847.3436	10,779.1979	10,588.9383	10,586.2218	10,545.7404	10,449.8664	10,376.2558	10,235.4031	10,268.5908	10,295.7875	10,294.0811	10,224.9146	10,239.6187	10,168.9318	10,281.0356	10,305.856	10,342.967	10,295.1602	10,392.8789	10,179.4256	10,169.91	10,098.2769	10,000
I C E Bof A U S Treasury Bill Index 732 [Member]
Account Value [Line Items]
Account Value	11,797.7866	11,744.6572	11,686.08	11,631.3422	11,583.4012	11,527.4701	11,479.7885	11,428.0081	11,383.3358	11,335.0836	11,280.6052	11,228.1503		11,178.0302	11,127.495	11,077.323	11,032.08	10,982.79		10,943.2543	10,906.6241	10,856.4521	10,821.067	10,785.8377	10,744.0191	10,709.6717	10,693.4839	10,673.0934	10,656.231	10,648.6041	10,649.071	10,642.378	10,640.7177	10,640.9252	10,640.6658		10,643.5713	10,643.2081	10,642.7411	10,642.8449	10,642.3261	10,641.8072	10,641.2884	10,641.7553	10,641.4959	10,641.0809	10,640.0951	10,639.0574	10,638.2272	10,637.0858	10,636.0481	10,634.9585	10,633.6614	10,632.9869	10,630.4446	10,628.8362	10,628.8362	10,628.5768	10,593.97	10,574.6691	10,559.9859	10,544.4725	10,531.709	10,509.8658	10,492.3808	10,470.0187	10,451.3923	10,426.8511	10,402.258	10,381.9713		10,358.4159	10,339.4781	10,317.5311	10,297.0369	10,276.4389	10,257.9162	10,242.8698	10,223.9321	10,207.5367	10,191.0375	10,175.2647	10,161.5673	10,147.2992	10,138.6345	10,127.5313	10,117.829	10,110.6171	10,102.4712	10,094.1698	10,083.7411	10,075.8547	10,067.8126	10,063.143		10,056.5019	10,055.568	10,051.3653	10,045.9175	10,041.8705	10,040.9366	10,038.6018	10,033.7766	10,032.0125	10,029.7815	10,023.1403	10,022.9847	10,019.716	10,014.2681	10,011.5183	10,008.8722	10,007.0044	10,007.9383	10,009.2873	10,005.3441	10,004.8252	10,005.1884	10,004.462	10,003.9951	10,002.2829	10,002.231	10,002.0235	10,000.3113	10,000.3113	10,000.1038	10,000
Bloomberg U S Aggregate Total Return Value Index 733 [Member]
Account Value [Line Items]
Account Value	12,004.424	11,845.8158	11,678.0004	11,411.4668	11,304.4398	11,115.9877	11,404.0404	11,299.6979	11,461.6339	11,493.195	11,069.4673	10,589.8898		10,759.6881	11,040.24	11,111.2139	11,118.9646	11,158.7602		11,281.6023	11,213.6426	10,935.8444	11,226.0979	10,891.0465	10,940.3949	10,552.327	10,690.7981	11,173.5652	11,498.4738	11,224.2161	11,403.1101	11,330.0576	11,776.9683	12,113.503	12,250.172		12,519.9004	12,552.0197	12,514.9938	12,518.4439	12,627.7727	12,651.8595	12,511.9637	12,424.6696	12,384.2096	12,287.1394	12,442.5048	12,624.817	12,715.9864	12,698.4914	12,575.0965	12,631.4992	12,638.4313	12,741.2746	12,553.758	12,475.1769	12,417.3601	12,200.4833	12,272.7065	12,055.7234	11,828.0976	11,836.3427	11,842.3764	11,806.8123	11,870.0302	11,570.2238	11,544.8346	11,401.6482	11,202.782	11,199.9166		10,988.9087	10,995.2773	10,879.7393	10,683.4727	10,620.0741	10,704.6676	10,774.0467	10,705.1619	10,702.6209	10,715.7993	10,639.8655	10,719.5896	10,651.2843	10,753.2186	10,878.506	10,828.8068	10,842.724	10,836.4459	10,888.3034	10,791.5097	10,745.2712	10,756.0945	10,673.9358		10,592.197	10,597.7522	10,527.0016	10,506.3861	10,491.5864	10,745.7655	10,828.5941	10,834.9414	10,847.3436	10,779.1979	10,588.9383	10,586.2218	10,545.7404	10,449.8664	10,376.2558	10,235.4031	10,268.5908	10,295.7875	10,294.0811	10,224.9146	10,239.6187	10,168.9318	10,281.0356	10,305.856	10,342.967	10,295.1602	10,392.8789	10,179.4256	10,169.91	10,098.2769	10,000
Bloomberg U S Government Intermediate Total Return Index 755 [Member]
Account Value [Line Items]
Account Value	11,609.4455	11,495.8302	11,372.7933	11,168.445	11,074.7431	10,953.0281	11,103.49	11,049.0938	11,166.7533	11,142.342	10,914.5906	10,680.952		10,716.6503	10,818.6537	10,812.7161	10,800.9641	10,901.147		10,982.2287	10,923.7434	10,664.59	10,852.6772	10,682.5596	10,707.7832	10,527.7061	10,575.795	10,833.0607	11,053.5022	10,908.8546	10,989.7403	10,915.9181	11,092.2646	11,377.7898	11,429.4021		11,577.136	11,607.6138	11,578.486	11,644.8189	11,715.5827	11,734.5102	11,645.1102	11,653.6973	11,616.9459	11,573.8479	11,652.297	11,749.0013	11,776.6839	11,772.9365	11,758.6134	11,802.2379	11,793.494	11,816.4937	11,778.8685	11,768.6793	11,747.2424	11,714.8825	11,480.5774	11,295.1397	11,138.0904	11,141.3729	11,168.5514	11,136.4716	11,185.5127	10,987.8862	11,007.0825	10,917.1224	10,759.8771	10,754.931		10,625.3739	10,632.7567	10,587.519	10,432.5927	10,361.6441	10,357.6278	10,410.3267	10,348.9063	10,369.1445	10,370.2928	10,303.7974	10,362.5739	10,308.9283	10,339.3165	10,438.6871	10,436.0096	10,467.9045	10,481.1129	10,542.27	10,478.4858	10,445.1736	10,472.509	10,431.506		10,377.1322	10,371.9788	10,342.0668	10,321.4869	10,324.3045	10,500.7461	10,551.2324	10,533.246	10,580.7748	10,576.8705	10,429.0917	10,443.9861	10,446.9605	10,427.2264	10,375.9447	10,213.8093	10,233.2913	10,267.1468	10,299.8931	10,223.7071	10,218.0552	10,177.0746	10,216.8621	10,211.7143	10,220.968	10,167.2664	10,255.4004	10,094.5925	10,120.9308	10,070.1644	10,000
Bloomberg U S Aggregate Total Return Value Index 756 [Member]
Account Value [Line Items]
Account Value	12,004.424	11,845.8158	11,678.0004	11,411.4668	11,304.4398	11,115.9877	11,404.0404	11,299.6979	11,461.6339	11,493.195	11,069.4673	10,589.8898		10,759.6881	11,040.24	11,111.2139	11,118.9646	11,158.7602		11,281.6023	11,213.6426	10,935.8444	11,226.0979	10,891.0465	10,940.3949	10,552.327	10,690.7981	11,173.5652	11,498.4738	11,224.2161	11,403.1101	11,330.0576	11,776.9683	12,113.503	12,250.172		12,519.9004	12,552.0197	12,514.9938	12,518.4439	12,627.7727	12,651.8595	12,511.9637	12,424.6696	12,384.2096	12,287.1394	12,442.5048	12,624.817	12,715.9864	12,698.4914	12,575.0965	12,631.4992	12,638.4313	12,741.2746	12,553.758	12,475.1769	12,417.3601	12,200.4833	12,272.7065	12,055.7234	11,828.0976	11,836.3427	11,842.3764	11,806.8123	11,870.0302	11,570.2238	11,544.8346	11,401.6482	11,202.782	11,199.9166		10,988.9087	10,995.2773	10,879.7393	10,683.4727	10,620.0741	10,704.6676	10,774.0467	10,705.1619	10,702.6209	10,715.7993	10,639.8655	10,719.5896	10,651.2843	10,753.2186	10,878.506	10,828.8068	10,842.724	10,836.4459	10,888.3034	10,791.5097	10,745.2712	10,756.0945	10,673.9358		10,592.197	10,597.7522	10,527.0016	10,506.3861	10,491.5864	10,745.7655	10,828.5941	10,834.9414	10,847.3436	10,779.1979	10,588.9383	10,586.2218	10,545.7404	10,449.8664	10,376.2558	10,235.4031	10,268.5908	10,295.7875	10,294.0811	10,224.9146	10,239.6187	10,168.9318	10,281.0356	10,305.856	10,342.967	10,295.1602	10,392.8789	10,179.4256	10,169.91	10,098.2769	10,000
Bloomberg U S Government Intermediate Total Return Index 773 [Member]
Account Value [Line Items]
Account Value	11,609.4455	11,495.8302	11,372.7933	11,168.445	11,074.7431	10,953.0281	11,103.49	11,049.0938	11,166.7533	11,142.342	10,914.5906	10,680.952		10,716.6503	10,818.6537	10,812.7161	10,800.9641	10,901.147		10,982.2287	10,923.7434	10,664.59	10,852.6772	10,682.5596	10,707.7832	10,527.7061	10,575.795	10,833.0607	11,053.5022	10,908.8546	10,989.7403	10,915.9181	11,092.2646	11,377.7898	11,429.4021		11,577.136	11,607.6138	11,578.486	11,644.8189	11,715.5827	11,734.5102	11,645.1102	11,653.6973	11,616.9459	11,573.8479	11,652.297	11,749.0013	11,776.6839	11,772.9365	11,758.6134	11,802.2379	11,793.494	11,816.4937	11,778.8685	11,768.6793	11,747.2424	11,714.8825	11,480.5774	11,295.1397	11,138.0904	11,141.3729	11,168.5514	11,136.4716	11,185.5127	10,987.8862	11,007.0825	10,917.1224	10,759.8771	10,754.931		10,625.3739	10,632.7567	10,587.519	10,432.5927	10,361.6441	10,357.6278	10,410.3267	10,348.9063	10,369.1445	10,370.2928	10,303.7974	10,362.5739	10,308.9283	10,339.3165	10,438.6871	10,436.0096	10,467.9045	10,481.1129	10,542.27	10,478.4858	10,445.1736	10,472.509	10,431.506		10,377.1322	10,371.9788	10,342.0668	10,321.4869	10,324.3045	10,500.7461	10,551.2324	10,533.246	10,580.7748	10,576.8705	10,429.0917	10,443.9861	10,446.9605	10,427.2264	10,375.9447	10,213.8093	10,233.2913	10,267.1468	10,299.8931	10,223.7071	10,218.0552	10,177.0746	10,216.8621	10,211.7143	10,220.968	10,167.2664	10,255.4004	10,094.5925	10,120.9308	10,070.1644	10,000
Bloomberg U S Aggregate Total Return Value Index 774 [Member]
Account Value [Line Items]
Account Value	12,004.424	11,845.8158	11,678.0004	11,411.4668	11,304.4398	11,115.9877	11,404.0404	11,299.6979	11,461.6339	11,493.195	11,069.4673	10,589.8898		10,759.6881	11,040.24	11,111.2139	11,118.9646	11,158.7602		11,281.6023	11,213.6426	10,935.8444	11,226.0979	10,891.0465	10,940.3949	10,552.327	10,690.7981	11,173.5652	11,498.4738	11,224.2161	11,403.1101	11,330.0576	11,776.9683	12,113.503	12,250.172		12,519.9004	12,552.0197	12,514.9938	12,518.4439	12,627.7727	12,651.8595	12,511.9637	12,424.6696	12,384.2096	12,287.1394	12,442.5048	12,624.817	12,715.9864	12,698.4914	12,575.0965	12,631.4992	12,638.4313	12,741.2746	12,553.758	12,475.1769	12,417.3601	12,200.4833	12,272.7065	12,055.7234	11,828.0976	11,836.3427	11,842.3764	11,806.8123	11,870.0302	11,570.2238	11,544.8346	11,401.6482	11,202.782	11,199.9166		10,988.9087	10,995.2773	10,879.7393	10,683.4727	10,620.0741	10,704.6676	10,774.0467	10,705.1619	10,702.6209	10,715.7993	10,639.8655	10,719.5896	10,651.2843	10,753.2186	10,878.506	10,828.8068	10,842.724	10,836.4459	10,888.3034	10,791.5097	10,745.2712	10,756.0945	10,673.9358		10,592.197	10,597.7522	10,527.0016	10,506.3861	10,491.5864	10,745.7655	10,828.5941	10,834.9414	10,847.3436	10,779.1979	10,588.9383	10,586.2218	10,545.7404	10,449.8664	10,376.2558	10,235.4031	10,268.5908	10,295.7875	10,294.0811	10,224.9146	10,239.6187	10,168.9318	10,281.0356	10,305.856	10,342.967	10,295.1602	10,392.8789	10,179.4256	10,169.91	10,098.2769	10,000
Bloomberg U S Government Intermediate Total Return Index 791 [Member]
Account Value [Line Items]
Account Value	9,836.6476	9,740.3817	9,636.1329	9,462.9892	9,383.5958	9,280.4671	9,407.953	9,361.8633	9,461.5558	9,440.8722	9,247.8991	9,049.9379		9,080.185	9,166.6121	9,161.5812	9,151.6238	9,236.5084		9,305.2087	9,255.6543	9,036.0744	9,195.4401	9,051.3	9,072.6719	8,920.0931	8,960.8387	9,178.8191	9,365.5985	9,243.0391	9,311.5733	9,249.024	9,398.4418	9,640.3664	9,684.0973		9,809.2719	9,835.0956	9,810.4157	9,866.6194	9,926.5773	9,942.6145	9,866.8662	9,874.142	9,843.0026	9,806.4859	9,872.9555	9,954.8927	9,978.3481	9,975.173	9,963.0371	10,000
Bloomberg U S Aggregate Total Return Value Index 792 [Member]
Account Value [Line Items]
Account Value	9,503.5623	9,377.9967	9,245.142	9,034.1349	8,949.4047	8,800.2124	9,028.2556	8,945.6507	9,073.8508	9,098.8368	8,763.3836	8,383.7157		8,518.1402	8,740.2452	8,796.4332	8,802.5692	8,834.0742		8,931.3249	8,877.5231	8,657.5981	8,887.3836	8,622.1329	8,661.2006	8,353.9783	8,463.6019	8,845.795	9,103.0159	8,885.8938	9,027.5191	8,969.6856	9,323.4921	9,589.917	9,698.114		9,911.6504	9,937.0783	9,907.766	9,910.4973	9,997.0498	10,016.1187	9,905.3671	9,836.2589	9,804.2278	9,727.3801	9,850.3785	9,994.7099	10,066.8861	10,053.0358	9,955.3475	10,000
Bloomberg U S Government Intermediate Total Return Index 809 [Member]
Account Value [Line Items]
Account Value	11,609.4455	11,495.8302	11,372.7933	11,168.445	11,074.7431	10,953.0281	11,103.49	11,049.0938	11,166.7533	11,142.342	10,914.5906	10,680.952		10,716.6503	10,818.6537	10,812.7161	10,800.9641	10,901.147		10,982.2287	10,923.7434	10,664.59	10,852.6772	10,682.5596	10,707.7832	10,527.7061	10,575.795	10,833.0607	11,053.5022	10,908.8546	10,989.7403	10,915.9181	11,092.2646	11,377.7898	11,429.4021		11,577.136	11,607.6138	11,578.486	11,644.8189	11,715.5827	11,734.5102	11,645.1102	11,653.6973	11,616.9459	11,573.8479	11,652.297	11,749.0013	11,776.6839	11,772.9365	11,758.6134	11,802.2379	11,793.494	11,816.4937	11,778.8685	11,768.6793	11,747.2424	11,714.8825	11,480.5774	11,295.1397	11,138.0904	11,141.3729	11,168.5514	11,136.4716	11,185.5127	10,987.8862	11,007.0825	10,917.1224	10,759.8771	10,754.931		10,625.3739	10,632.7567	10,587.519	10,432.5927	10,361.6441	10,357.6278	10,410.3267	10,348.9063	10,369.1445	10,370.2928	10,303.7974	10,362.5739	10,308.9283	10,339.3165	10,438.6871	10,436.0096	10,467.9045	10,481.1129	10,542.27	10,478.4858	10,445.1736	10,472.509	10,431.506		10,377.1322	10,371.9788	10,342.0668	10,321.4869	10,324.3045	10,500.7461	10,551.2324	10,533.246	10,580.7748	10,576.8705	10,429.0917	10,443.9861	10,446.9605	10,427.2264	10,375.9447	10,213.8093	10,233.2913	10,267.1468	10,299.8931	10,223.7071	10,218.0552	10,177.0746	10,216.8621	10,211.7143	10,220.968	10,167.2664	10,255.4004	10,094.5925	10,120.9308	10,070.1644	10,000
Bloomberg U S Aggregate Total Return Value Index 810 [Member]
Account Value [Line Items]
Account Value	12,004.424	11,845.8158	11,678.0004	11,411.4668	11,304.4398	11,115.9877	11,404.0404	11,299.6979	11,461.6339	11,493.195	11,069.4673	10,589.8898		10,759.6881	11,040.24	11,111.2139	11,118.9646	11,158.7602		11,281.6023	11,213.6426	10,935.8444	11,226.0979	10,891.0465	10,940.3949	10,552.327	10,690.7981	11,173.5652	11,498.4738	11,224.2161	11,403.1101	11,330.0576	11,776.9683	12,113.503	12,250.172		12,519.9004	12,552.0197	12,514.9938	12,518.4439	12,627.7727	12,651.8595	12,511.9637	12,424.6696	12,384.2096	12,287.1394	12,442.5048	12,624.817	12,715.9864	12,698.4914	12,575.0965	12,631.4992	12,638.4313	12,741.2746	12,553.758	12,475.1769	12,417.3601	12,200.4833	12,272.7065	12,055.7234	11,828.0976	11,836.3427	11,842.3764	11,806.8123	11,870.0302	11,570.2238	11,544.8346	11,401.6482	11,202.782	11,199.9166		10,988.9087	10,995.2773	10,879.7393	10,683.4727	10,620.0741	10,704.6676	10,774.0467	10,705.1619	10,702.6209	10,715.7993	10,639.8655	10,719.5896	10,651.2843	10,753.2186	10,878.506	10,828.8068	10,842.724	10,836.4459	10,888.3034	10,791.5097	10,745.2712	10,756.0945	10,673.9358		10,592.197	10,597.7522	10,527.0016	10,506.3861	10,491.5864	10,745.7655	10,828.5941	10,834.9414	10,847.3436	10,779.1979	10,588.9383	10,586.2218	10,545.7404	10,449.8664	10,376.2558	10,235.4031	10,268.5908	10,295.7875	10,294.0811	10,224.9146	10,239.6187	10,168.9318	10,281.0356	10,305.856	10,342.967	10,295.1602	10,392.8789	10,179.4256	10,169.91	10,098.2769	10,000
Bloomberg U S Government Intermediate Total Return Index 826 [Member]
Account Value [Line Items]
Account Value	11,609.4455	11,495.8302	11,372.7933	11,168.445	11,074.7431	10,953.0281	11,103.49	11,049.0938	11,166.7533	11,142.342	10,914.5906	10,680.952		10,716.6503	10,818.6537	10,812.7161	10,800.9641	10,901.147		10,982.2287	10,923.7434	10,664.59	10,852.6772	10,682.5596	10,707.7832	10,527.7061	10,575.795	10,833.0607	11,053.5022	10,908.8546	10,989.7403	10,915.9181	11,092.2646	11,377.7898	11,429.4021		11,577.136	11,607.6138	11,578.486	11,644.8189	11,715.5827	11,734.5102	11,645.1102	11,653.6973	11,616.9459	11,573.8479	11,652.297	11,749.0013	11,776.6839	11,772.9365	11,758.6134	11,802.2379	11,793.494	11,816.4937	11,778.8685	11,768.6793	11,747.2424	11,714.8825	11,480.5774	11,295.1397	11,138.0904	11,141.3729	11,168.5514	11,136.4716	11,185.5127	10,987.8862	11,007.0825	10,917.1224	10,759.8771	10,754.931		10,625.3739	10,632.7567	10,587.519	10,432.5927	10,361.6441	10,357.6278	10,410.3267	10,348.9063	10,369.1445	10,370.2928	10,303.7974	10,362.5739	10,308.9283	10,339.3165	10,438.6871	10,436.0096	10,467.9045	10,481.1129	10,542.27	10,478.4858	10,445.1736	10,472.509	10,431.506		10,377.1322	10,371.9788	10,342.0668	10,321.4869	10,324.3045	10,500.7461	10,551.2324	10,533.246	10,580.7748	10,576.8705	10,429.0917	10,443.9861	10,446.9605	10,427.2264	10,375.9447	10,213.8093	10,233.2913	10,267.1468	10,299.8931	10,223.7071	10,218.0552	10,177.0746	10,216.8621	10,211.7143	10,220.968	10,167.2664	10,255.4004	10,094.5925	10,120.9308	10,070.1644	10,000
Bloomberg U S Aggregate Total Return Value Index 827 [Member]
Account Value [Line Items]
Account Value	12,004.424	11,845.8158	11,678.0004	11,411.4668	11,304.4398	11,115.9877	11,404.0404	11,299.6979	11,461.6339	11,493.195	11,069.4673	10,589.8898		10,759.6881	11,040.24	11,111.2139	11,118.9646	11,158.7602		11,281.6023	11,213.6426	10,935.8444	11,226.0979	10,891.0465	10,940.3949	10,552.327	10,690.7981	11,173.5652	11,498.4738	11,224.2161	11,403.1101	11,330.0576	11,776.9683	12,113.503	12,250.172		12,519.9004	12,552.0197	12,514.9938	12,518.4439	12,627.7727	12,651.8595	12,511.9637	12,424.6696	12,384.2096	12,287.1394	12,442.5048	12,624.817	12,715.9864	12,698.4914	12,575.0965	12,631.4992	12,638.4313	12,741.2746	12,553.758	12,475.1769	12,417.3601	12,200.4833	12,272.7065	12,055.7234	11,828.0976	11,836.3427	11,842.3764	11,806.8123	11,870.0302	11,570.2238	11,544.8346	11,401.6482	11,202.782	11,199.9166		10,988.9087	10,995.2773	10,879.7393	10,683.4727	10,620.0741	10,704.6676	10,774.0467	10,705.1619	10,702.6209	10,715.7993	10,639.8655	10,719.5896	10,651.2843	10,753.2186	10,878.506	10,828.8068	10,842.724	10,836.4459	10,888.3034	10,791.5097	10,745.2712	10,756.0945	10,673.9358		10,592.197	10,597.7522	10,527.0016	10,506.3861	10,491.5864	10,745.7655	10,828.5941	10,834.9414	10,847.3436	10,779.1979	10,588.9383	10,586.2218	10,545.7404	10,449.8664	10,376.2558	10,235.4031	10,268.5908	10,295.7875	10,294.0811	10,224.9146	10,239.6187	10,168.9318	10,281.0356	10,305.856	10,342.967	10,295.1602	10,392.8789	10,179.4256	10,169.91	10,098.2769	10,000
Bloomberg U S Government Intermediate Total Return Index 843 [Member]
Account Value [Line Items]
Account Value	11,609.4455	11,495.8302	11,372.7933	11,168.445	11,074.7431	10,953.0281	11,103.49	11,049.0938	11,166.7533	11,142.342	10,914.5906	10,680.952		10,716.6503	10,818.6537	10,812.7161	10,800.9641	10,901.147		10,982.2287	10,923.7434	10,664.59	10,852.6772	10,682.5596	10,707.7832	10,527.7061	10,575.795	10,833.0607	11,053.5022	10,908.8546	10,989.7403	10,915.9181	11,092.2646	11,377.7898	11,429.4021		11,577.136	11,607.6138	11,578.486	11,644.8189	11,715.5827	11,734.5102	11,645.1102	11,653.6973	11,616.9459	11,573.8479	11,652.297	11,749.0013	11,776.6839	11,772.9365	11,758.6134	11,802.2379	11,793.494	11,816.4937	11,778.8685	11,768.6793	11,747.2424	11,714.8825	11,480.5774	11,295.1397	11,138.0904	11,141.3729	11,168.5514	11,136.4716	11,185.5127	10,987.8862	11,007.0825	10,917.1224	10,759.8771	10,754.931		10,625.3739	10,632.7567	10,587.519	10,432.5927	10,361.6441	10,357.6278	10,410.3267	10,348.9063	10,369.1445	10,370.2928	10,303.7974	10,362.5739	10,308.9283	10,339.3165	10,438.6871	10,436.0096	10,467.9045	10,481.1129	10,542.27	10,478.4858	10,445.1736	10,472.509	10,431.506		10,377.1322	10,371.9788	10,342.0668	10,321.4869	10,324.3045	10,500.7461	10,551.2324	10,533.246	10,580.7748	10,576.8705	10,429.0917	10,443.9861	10,446.9605	10,427.2264	10,375.9447	10,213.8093	10,233.2913	10,267.1468	10,299.8931	10,223.7071	10,218.0552	10,177.0746	10,216.8621	10,211.7143	10,220.968	10,167.2664	10,255.4004	10,094.5925	10,120.9308	10,070.1644	10,000
Bloomberg U S Aggregate Total Return Value Index 844 [Member]
Account Value [Line Items]
Account Value	12,004.424	11,845.8158	11,678.0004	11,411.4668	11,304.4398	11,115.9877	11,404.0404	11,299.6979	11,461.6339	11,493.195	11,069.4673	10,589.8898		10,759.6881	11,040.24	11,111.2139	11,118.9646	11,158.7602		11,281.6023	11,213.6426	10,935.8444	11,226.0979	10,891.0465	10,940.3949	10,552.327	10,690.7981	11,173.5652	11,498.4738	11,224.2161	11,403.1101	11,330.0576	11,776.9683	12,113.503	12,250.172		12,519.9004	12,552.0197	12,514.9938	12,518.4439	12,627.7727	12,651.8595	12,511.9637	12,424.6696	12,384.2096	12,287.1394	12,442.5048	12,624.817	12,715.9864	12,698.4914	12,575.0965	12,631.4992	12,638.4313	12,741.2746	12,553.758	12,475.1769	12,417.3601	12,200.4833	12,272.7065	12,055.7234	11,828.0976	11,836.3427	11,842.3764	11,806.8123	11,870.0302	11,570.2238	11,544.8346	11,401.6482	11,202.782	11,199.9166		10,988.9087	10,995.2773	10,879.7393	10,683.4727	10,620.0741	10,704.6676	10,774.0467	10,705.1619	10,702.6209	10,715.7993	10,639.8655	10,719.5896	10,651.2843	10,753.2186	10,878.506	10,828.8068	10,842.724	10,836.4459	10,888.3034	10,791.5097	10,745.2712	10,756.0945	10,673.9358		10,592.197	10,597.7522	10,527.0016	10,506.3861	10,491.5864	10,745.7655	10,828.5941	10,834.9414	10,847.3436	10,779.1979	10,588.9383	10,586.2218	10,545.7404	10,449.8664	10,376.2558	10,235.4031	10,268.5908	10,295.7875	10,294.0811	10,224.9146	10,239.6187	10,168.9318	10,281.0356	10,305.856	10,342.967	10,295.1602	10,392.8789	10,179.4256	10,169.91	10,098.2769	10,000
Bloomberg U S Government Intermediate Total Return Index 860 [Member]
Account Value [Line Items]
Account Value	11,609.4455	11,495.8302	11,372.7933	11,168.445	11,074.7431	10,953.0281	11,103.49	11,049.0938	11,166.7533	11,142.342	10,914.5906	10,680.952		10,716.6503	10,818.6537	10,812.7161	10,800.9641	10,901.147		10,982.2287	10,923.7434	10,664.59	10,852.6772	10,682.5596	10,707.7832	10,527.7061	10,575.795	10,833.0607	11,053.5022	10,908.8546	10,989.7403	10,915.9181	11,092.2646	11,377.7898	11,429.4021		11,577.136	11,607.6138	11,578.486	11,644.8189	11,715.5827	11,734.5102	11,645.1102	11,653.6973	11,616.9459	11,573.8479	11,652.297	11,749.0013	11,776.6839	11,772.9365	11,758.6134	11,802.2379	11,793.494	11,816.4937	11,778.8685	11,768.6793	11,747.2424	11,714.8825	11,480.5774	11,295.1397	11,138.0904	11,141.3729	11,168.5514	11,136.4716	11,185.5127	10,987.8862	11,007.0825	10,917.1224	10,759.8771	10,754.931		10,625.3739	10,632.7567	10,587.519	10,432.5927	10,361.6441	10,357.6278	10,410.3267	10,348.9063	10,369.1445	10,370.2928	10,303.7974	10,362.5739	10,308.9283	10,339.3165	10,438.6871	10,436.0096	10,467.9045	10,481.1129	10,542.27	10,478.4858	10,445.1736	10,472.509	10,431.506		10,377.1322	10,371.9788	10,342.0668	10,321.4869	10,324.3045	10,500.7461	10,551.2324	10,533.246	10,580.7748	10,576.8705	10,429.0917	10,443.9861	10,446.9605	10,427.2264	10,375.9447	10,213.8093	10,233.2913	10,267.1468	10,299.8931	10,223.7071	10,218.0552	10,177.0746	10,216.8621	10,211.7143	10,220.968	10,167.2664	10,255.4004	10,094.5925	10,120.9308	10,070.1644	10,000
Bloomberg U S Aggregate Total Return Value Index 861 [Member]
Account Value [Line Items]
Account Value	12,004.424	11,845.8158	11,678.0004	11,411.4668	11,304.4398	11,115.9877	11,404.0404	11,299.6979	11,461.6339	11,493.195	11,069.4673	10,589.8898		10,759.6881	11,040.24	11,111.2139	11,118.9646	11,158.7602		11,281.6023	11,213.6426	10,935.8444	11,226.0979	10,891.0465	10,940.3949	10,552.327	10,690.7981	11,173.5652	11,498.4738	11,224.2161	11,403.1101	11,330.0576	11,776.9683	12,113.503	12,250.172		12,519.9004	12,552.0197	12,514.9938	12,518.4439	12,627.7727	12,651.8595	12,511.9637	12,424.6696	12,384.2096	12,287.1394	12,442.5048	12,624.817	12,715.9864	12,698.4914	12,575.0965	12,631.4992	12,638.4313	12,741.2746	12,553.758	12,475.1769	12,417.3601	12,200.4833	12,272.7065	12,055.7234	11,828.0976	11,836.3427	11,842.3764	11,806.8123	11,870.0302	11,570.2238	11,544.8346	11,401.6482	11,202.782	11,199.9166		10,988.9087	10,995.2773	10,879.7393	10,683.4727	10,620.0741	10,704.6676	10,774.0467	10,705.1619	10,702.6209	10,715.7993	10,639.8655	10,719.5896	10,651.2843	10,753.2186	10,878.506	10,828.8068	10,842.724	10,836.4459	10,888.3034	10,791.5097	10,745.2712	10,756.0945	10,673.9358		10,592.197	10,597.7522	10,527.0016	10,506.3861	10,491.5864	10,745.7655	10,828.5941	10,834.9414	10,847.3436	10,779.1979	10,588.9383	10,586.2218	10,545.7404	10,449.8664	10,376.2558	10,235.4031	10,268.5908	10,295.7875	10,294.0811	10,224.9146	10,239.6187	10,168.9318	10,281.0356	10,305.856	10,342.967	10,295.1602	10,392.8789	10,179.4256	10,169.91	10,098.2769	10,000
Bloomberg Intermediate U S Government Credit Total Return Index 877 [Member]
Account Value [Line Items]
Account Value	12,147.2281	12,016.8903	11,880.1489	11,660.9742	11,568.7101	11,430.8211	11,587.1629	11,513.2748	11,628.8278	11,604.5809	11,341.6308	11,047.2002		11,098.5986	11,219.4692	11,221.0881	11,191.7746	11,268.3779		11,352.4197	11,283.5469	11,030.3918	11,232.1434	11,026.4011	11,046.3498	10,811.5758	10,859.3626	11,157.6558	11,385.3397	11,202.4406	11,328.4034	11,244.7048	11,474.0792	11,761.9166	11,839.6059		12,015.8862	12,031.3473	12,017.4282	12,084.8973	12,154.7844	12,174.5385	12,082.0592	12,072.2334	12,023.96	11,964.6876	12,058.3042	12,157.6584	12,191.48	12,166.4545	12,106.4393	12,133.0427	12,134.5437	12,148.934	12,058.8984	11,984.9847	11,894.5341	11,729.4064	11,781.061	11,617.0809	11,454.4942	11,440.1193	11,457.2248	11,411.9738	11,453.5004	11,253.962	11,257.799	11,138.4756	10,994.9821	10,973.8756		10,827.3493	10,818.0666	10,724.993	10,583.559	10,536.0027	10,550.4955	10,593.0723	10,530.7671	10,528.0058	10,534.932	10,472.3605	10,527.3501	10,489.6299	10,538.0724	10,631.6377	10,619.4605	10,652.1807	10,653.0567	10,701.3353	10,638.3641	10,589.3632	10,608.4411	10,555.767		10,490.5008	10,485.7672	10,437.2888	10,409.1588	10,401.8279	10,584.9473	10,628.8508	10,614.6706	10,641.9861	10,611.9298	10,462.0531	10,474.0715	10,446.3359	10,371.956	10,321.7051	10,196.936	10,231.0957	10,257.2791	10,267.8682	10,199.1337	10,207.7402	10,171.3008	10,232.4021	10,231.4031	10,235.0557	10,185.2608	10,256.6848	10,089.052	10,121.0909	10,070.3226	10,000
Bloomberg U S Aggregate Total Return Value Index 878 [Member]
Account Value [Line Items]
Account Value	12,004.424	11,845.8158	11,678.0004	11,411.4668	11,304.4398	11,115.9877	11,404.0404	11,299.6979	11,461.6339	11,493.195	11,069.4673	10,589.8898		10,759.6881	11,040.24	11,111.2139	11,118.9646	11,158.7602		11,281.6023	11,213.6426	10,935.8444	11,226.0979	10,891.0465	10,940.3949	10,552.327	10,690.7981	11,173.5652	11,498.4738	11,224.2161	11,403.1101	11,330.0576	11,776.9683	12,113.503	12,250.172		12,519.9004	12,552.0197	12,514.9938	12,518.4439	12,627.7727	12,651.8595	12,511.9637	12,424.6696	12,384.2096	12,287.1394	12,442.5048	12,624.817	12,715.9864	12,698.4914	12,575.0965	12,631.4992	12,638.4313	12,741.2746	12,553.758	12,475.1769	12,417.3601	12,200.4833	12,272.7065	12,055.7234	11,828.0976	11,836.3427	11,842.3764	11,806.8123	11,870.0302	11,570.2238	11,544.8346	11,401.6482	11,202.782	11,199.9166		10,988.9087	10,995.2773	10,879.7393	10,683.4727	10,620.0741	10,704.6676	10,774.0467	10,705.1619	10,702.6209	10,715.7993	10,639.8655	10,719.5896	10,651.2843	10,753.2186	10,878.506	10,828.8068	10,842.724	10,836.4459	10,888.3034	10,791.5097	10,745.2712	10,756.0945	10,673.9358		10,592.197	10,597.7522	10,527.0016	10,506.3861	10,491.5864	10,745.7655	10,828.5941	10,834.9414	10,847.3436	10,779.1979	10,588.9383	10,586.2218	10,545.7404	10,449.8664	10,376.2558	10,235.4031	10,268.5908	10,295.7875	10,294.0811	10,224.9146	10,239.6187	10,168.9318	10,281.0356	10,305.856	10,342.967	10,295.1602	10,392.8789	10,179.4256	10,169.91	10,098.2769	10,000
Bloomberg Intermediate U S Government Credit Total Return Index 901 [Member]
Account Value [Line Items]
Account Value	12,147.2281	12,016.8903	11,880.1489	11,660.9742	11,568.7101	11,430.8211	11,587.1629	11,513.2748	11,628.8278	11,604.5809	11,341.6308	11,047.2002		11,098.5986	11,219.4692	11,221.0881	11,191.7746	11,268.3779		11,352.4197	11,283.5469	11,030.3918	11,232.1434	11,026.4011	11,046.3498	10,811.5758	10,859.3626	11,157.6558	11,385.3397	11,202.4406	11,328.4034	11,244.7048	11,474.0792	11,761.9166	11,839.6059		12,015.8862	12,031.3473	12,017.4282	12,084.8973	12,154.7844	12,174.5385	12,082.0592	12,072.2334	12,023.96	11,964.6876	12,058.3042	12,157.6584	12,191.48	12,166.4545	12,106.4393	12,133.0427	12,134.5437	12,148.934	12,058.8984	11,984.9847	11,894.5341	11,729.4064	11,781.061	11,617.0809	11,454.4942	11,440.1193	11,457.2248	11,411.9738	11,453.5004	11,253.962	11,257.799	11,138.4756	10,994.9821	10,973.8756		10,827.3493	10,818.0666	10,724.993	10,583.559	10,536.0027	10,550.4955	10,593.0723	10,530.7671	10,528.0058	10,534.932	10,472.3605	10,527.3501	10,489.6299	10,538.0724	10,631.6377	10,619.4605	10,652.1807	10,653.0567	10,701.3353	10,638.3641	10,589.3632	10,608.4411	10,555.767		10,490.5008	10,485.7672	10,437.2888	10,409.1588	10,401.8279	10,584.9473	10,628.8508	10,614.6706	10,641.9861	10,611.9298	10,462.0531	10,474.0715	10,446.3359	10,371.956	10,321.7051	10,196.936	10,231.0957	10,257.2791	10,267.8682	10,199.1337	10,207.7402	10,171.3008	10,232.4021	10,231.4031	10,235.0557	10,185.2608	10,256.6848	10,089.052	10,121.0909	10,070.3226	10,000
Bloomberg U S Aggregate Total Return Value Index 902 [Member]
Account Value [Line Items]
Account Value	12,004.424	11,845.8158	11,678.0004	11,411.4668	11,304.4398	11,115.9877	11,404.0404	11,299.6979	11,461.6339	11,493.195	11,069.4673	10,589.8898		10,759.6881	11,040.24	11,111.2139	11,118.9646	11,158.7602		11,281.6023	11,213.6426	10,935.8444	11,226.0979	10,891.0465	10,940.3949	10,552.327	10,690.7981	11,173.5652	11,498.4738	11,224.2161	11,403.1101	11,330.0576	11,776.9683	12,113.503	12,250.172		12,519.9004	12,552.0197	12,514.9938	12,518.4439	12,627.7727	12,651.8595	12,511.9637	12,424.6696	12,384.2096	12,287.1394	12,442.5048	12,624.817	12,715.9864	12,698.4914	12,575.0965	12,631.4992	12,638.4313	12,741.2746	12,553.758	12,475.1769	12,417.3601	12,200.4833	12,272.7065	12,055.7234	11,828.0976	11,836.3427	11,842.3764	11,806.8123	11,870.0302	11,570.2238	11,544.8346	11,401.6482	11,202.782	11,199.9166		10,988.9087	10,995.2773	10,879.7393	10,683.4727	10,620.0741	10,704.6676	10,774.0467	10,705.1619	10,702.6209	10,715.7993	10,639.8655	10,719.5896	10,651.2843	10,753.2186	10,878.506	10,828.8068	10,842.724	10,836.4459	10,888.3034	10,791.5097	10,745.2712	10,756.0945	10,673.9358		10,592.197	10,597.7522	10,527.0016	10,506.3861	10,491.5864	10,745.7655	10,828.5941	10,834.9414	10,847.3436	10,779.1979	10,588.9383	10,586.2218	10,545.7404	10,449.8664	10,376.2558	10,235.4031	10,268.5908	10,295.7875	10,294.0811	10,224.9146	10,239.6187	10,168.9318	10,281.0356	10,305.856	10,342.967	10,295.1602	10,392.8789	10,179.4256	10,169.91	10,098.2769	10,000
Bloomberg Intermediate U S Government Credit Total Return Index 925 [Member]
Account Value [Line Items]
Account Value	10,011.6916	9,904.2677	9,791.566	9,610.9233	9,534.8796	9,421.2321	9,550.0883	9,489.1901	9,584.4283	9,564.4442	9,347.7218	9,105.0534		9,147.4158	9,247.0368	9,248.371	9,224.211	9,287.3471		9,356.614	9,299.8493	9,091.2	9,257.4828	9,087.9109	9,104.3525	8,910.8528	8,950.2385	9,196.0905	9,383.7465	9,233.0019	9,336.8198	9,267.8359	9,456.8852	9,694.1195	9,758.1507		9,903.4402	9,916.1831	9,904.7111	9,960.3188	10,017.9195	10,034.2007	9,957.9796	9,949.8813	9,910.0945	9,861.2425	9,938.4008	10,020.2882	10,048.1638	10,027.5379	9,978.0736	10,000
Bloomberg U S Aggregate Total Return Value Index 926 [Member]
Account Value [Line Items]
Account Value	9,503.5623	9,377.9967	9,245.142	9,034.1349	8,949.4047	8,800.2124	9,028.2556	8,945.6507	9,073.8508	9,098.8368	8,763.3836	8,383.7157		8,518.1402	8,740.2452	8,796.4332	8,802.5692	8,834.0742		8,931.3249	8,877.5231	8,657.5981	8,887.3836	8,622.1329	8,661.2006	8,353.9783	8,463.6019	8,845.795	9,103.0159	8,885.8938	9,027.5191	8,969.6856	9,323.4921	9,589.917	9,698.114		9,911.6504	9,937.0783	9,907.766	9,910.4973	9,997.0498	10,016.1187	9,905.3671	9,836.2589	9,804.2278	9,727.3801	9,850.3785	9,994.7099	10,066.8861	10,053.0358	9,955.3475	10,000
Bloomberg Intermediate U S Government Credit Total Return Index 949 [Member]
Account Value [Line Items]
Account Value	12,147.2281	12,016.8903	11,880.1489	11,660.9742	11,568.7101	11,430.8211	11,587.1629	11,513.2748	11,628.8278	11,604.5809	11,341.6308	11,047.2002		11,098.5986	11,219.4692	11,221.0881	11,191.7746	11,268.3779		11,352.4197	11,283.5469	11,030.3918	11,232.1434	11,026.4011	11,046.3498	10,811.5758	10,859.3626	11,157.6558	11,385.3397	11,202.4406	11,328.4034	11,244.7048	11,474.0792	11,761.9166	11,839.6059		12,015.8862	12,031.3473	12,017.4282	12,084.8973	12,154.7844	12,174.5385	12,082.0592	12,072.2334	12,023.96	11,964.6876	12,058.3042	12,157.6584	12,191.48	12,166.4545	12,106.4393	12,133.0427	12,134.5437	12,148.934	12,058.8984	11,984.9847	11,894.5341	11,729.4064	11,781.061	11,617.0809	11,454.4942	11,440.1193	11,457.2248	11,411.9738	11,453.5004	11,253.962	11,257.799	11,138.4756	10,994.9821	10,973.8756		10,827.3493	10,818.0666	10,724.993	10,583.559	10,536.0027	10,550.4955	10,593.0723	10,530.7671	10,528.0058	10,534.932	10,472.3605	10,527.3501	10,489.6299	10,538.0724	10,631.6377	10,619.4605	10,652.1807	10,653.0567	10,701.3353	10,638.3641	10,589.3632	10,608.4411	10,555.767		10,490.5008	10,485.7672	10,437.2888	10,409.1588	10,401.8279	10,584.9473	10,628.8508	10,614.6706	10,641.9861	10,611.9298	10,462.0531	10,474.0715	10,446.3359	10,371.956	10,321.7051	10,196.936	10,231.0957	10,257.2791	10,267.8682	10,199.1337	10,207.7402	10,171.3008	10,232.4021	10,231.4031	10,235.0557	10,185.2608	10,256.6848	10,089.052	10,121.0909	10,070.3226	10,000
Bloomberg U S Aggregate Total Return Value Index 950 [Member]
Account Value [Line Items]
Account Value	12,004.424	11,845.8158	11,678.0004	11,411.4668	11,304.4398	11,115.9877	11,404.0404	11,299.6979	11,461.6339	11,493.195	11,069.4673	10,589.8898		10,759.6881	11,040.24	11,111.2139	11,118.9646	11,158.7602		11,281.6023	11,213.6426	10,935.8444	11,226.0979	10,891.0465	10,940.3949	10,552.327	10,690.7981	11,173.5652	11,498.4738	11,224.2161	11,403.1101	11,330.0576	11,776.9683	12,113.503	12,250.172		12,519.9004	12,552.0197	12,514.9938	12,518.4439	12,627.7727	12,651.8595	12,511.9637	12,424.6696	12,384.2096	12,287.1394	12,442.5048	12,624.817	12,715.9864	12,698.4914	12,575.0965	12,631.4992	12,638.4313	12,741.2746	12,553.758	12,475.1769	12,417.3601	12,200.4833	12,272.7065	12,055.7234	11,828.0976	11,836.3427	11,842.3764	11,806.8123	11,870.0302	11,570.2238	11,544.8346	11,401.6482	11,202.782	11,199.9166		10,988.9087	10,995.2773	10,879.7393	10,683.4727	10,620.0741	10,704.6676	10,774.0467	10,705.1619	10,702.6209	10,715.7993	10,639.8655	10,719.5896	10,651.2843	10,753.2186	10,878.506	10,828.8068	10,842.724	10,836.4459	10,888.3034	10,791.5097	10,745.2712	10,756.0945	10,673.9358		10,592.197	10,597.7522	10,527.0016	10,506.3861	10,491.5864	10,745.7655	10,828.5941	10,834.9414	10,847.3436	10,779.1979	10,588.9383	10,586.2218	10,545.7404	10,449.8664	10,376.2558	10,235.4031	10,268.5908	10,295.7875	10,294.0811	10,224.9146	10,239.6187	10,168.9318	10,281.0356	10,305.856	10,342.967	10,295.1602	10,392.8789	10,179.4256	10,169.91	10,098.2769	10,000
Bloomberg Intermediate U S Government Credit Total Return Index 972 [Member]
Account Value [Line Items]
Account Value	12,147.2281	12,016.8903	11,880.1489	11,660.9742	11,568.7101	11,430.8211	11,587.1629	11,513.2748	11,628.8278	11,604.5809	11,341.6308	11,047.2002		11,098.5986	11,219.4692	11,221.0881	11,191.7746	11,268.3779		11,352.4197	11,283.5469	11,030.3918	11,232.1434	11,026.4011	11,046.3498	10,811.5758	10,859.3626	11,157.6558	11,385.3397	11,202.4406	11,328.4034	11,244.7048	11,474.0792	11,761.9166	11,839.6059		12,015.8862	12,031.3473	12,017.4282	12,084.8973	12,154.7844	12,174.5385	12,082.0592	12,072.2334	12,023.96	11,964.6876	12,058.3042	12,157.6584	12,191.48	12,166.4545	12,106.4393	12,133.0427	12,134.5437	12,148.934	12,058.8984	11,984.9847	11,894.5341	11,729.4064	11,781.061	11,617.0809	11,454.4942	11,440.1193	11,457.2248	11,411.9738	11,453.5004	11,253.962	11,257.799	11,138.4756	10,994.9821	10,973.8756		10,827.3493	10,818.0666	10,724.993	10,583.559	10,536.0027	10,550.4955	10,593.0723	10,530.7671	10,528.0058	10,534.932	10,472.3605	10,527.3501	10,489.6299	10,538.0724	10,631.6377	10,619.4605	10,652.1807	10,653.0567	10,701.3353	10,638.3641	10,589.3632	10,608.4411	10,555.767		10,490.5008	10,485.7672	10,437.2888	10,409.1588	10,401.8279	10,584.9473	10,628.8508	10,614.6706	10,641.9861	10,611.9298	10,462.0531	10,474.0715	10,446.3359	10,371.956	10,321.7051	10,196.936	10,231.0957	10,257.2791	10,267.8682	10,199.1337	10,207.7402	10,171.3008	10,232.4021	10,231.4031	10,235.0557	10,185.2608	10,256.6848	10,089.052	10,121.0909	10,070.3226	10,000
Bloomberg U S Aggregate Total Return Value Index 973 [Member]
Account Value [Line Items]
Account Value	12,004.424	11,845.8158	11,678.0004	11,411.4668	11,304.4398	11,115.9877	11,404.0404	11,299.6979	11,461.6339	11,493.195	11,069.4673	10,589.8898		10,759.6881	11,040.24	11,111.2139	11,118.9646	11,158.7602		11,281.6023	11,213.6426	10,935.8444	11,226.0979	10,891.0465	10,940.3949	10,552.327	10,690.7981	11,173.5652	11,498.4738	11,224.2161	11,403.1101	11,330.0576	11,776.9683	12,113.503	12,250.172		12,519.9004	12,552.0197	12,514.9938	12,518.4439	12,627.7727	12,651.8595	12,511.9637	12,424.6696	12,384.2096	12,287.1394	12,442.5048	12,624.817	12,715.9864	12,698.4914	12,575.0965	12,631.4992	12,638.4313	12,741.2746	12,553.758	12,475.1769	12,417.3601	12,200.4833	12,272.7065	12,055.7234	11,828.0976	11,836.3427	11,842.3764	11,806.8123	11,870.0302	11,570.2238	11,544.8346	11,401.6482	11,202.782	11,199.9166		10,988.9087	10,995.2773	10,879.7393	10,683.4727	10,620.0741	10,704.6676	10,774.0467	10,705.1619	10,702.6209	10,715.7993	10,639.8655	10,719.5896	10,651.2843	10,753.2186	10,878.506	10,828.8068	10,842.724	10,836.4459	10,888.3034	10,791.5097	10,745.2712	10,756.0945	10,673.9358		10,592.197	10,597.7522	10,527.0016	10,506.3861	10,491.5864	10,745.7655	10,828.5941	10,834.9414	10,847.3436	10,779.1979	10,588.9383	10,586.2218	10,545.7404	10,449.8664	10,376.2558	10,235.4031	10,268.5908	10,295.7875	10,294.0811	10,224.9146	10,239.6187	10,168.9318	10,281.0356	10,305.856	10,342.967	10,295.1602	10,392.8789	10,179.4256	10,169.91	10,098.2769	10,000
Bloomberg Intermediate U S Government Credit Total Return Index 995 [Member]
Account Value [Line Items]
Account Value	12,147.2281	12,016.8903	11,880.1489	11,660.9742	11,568.7101	11,430.8211	11,587.1629	11,513.2748	11,628.8278	11,604.5809	11,341.6308	11,047.2002		11,098.5986	11,219.4692	11,221.0881	11,191.7746	11,268.3779		11,352.4197	11,283.5469	11,030.3918	11,232.1434	11,026.4011	11,046.3498	10,811.5758	10,859.3626	11,157.6558	11,385.3397	11,202.4406	11,328.4034	11,244.7048	11,474.0792	11,761.9166	11,839.6059		12,015.8862	12,031.3473	12,017.4282	12,084.8973	12,154.7844	12,174.5385	12,082.0592	12,072.2334	12,023.96	11,964.6876	12,058.3042	12,157.6584	12,191.48	12,166.4545	12,106.4393	12,133.0427	12,134.5437	12,148.934	12,058.8984	11,984.9847	11,894.5341	11,729.4064	11,781.061	11,617.0809	11,454.4942	11,440.1193	11,457.2248	11,411.9738	11,453.5004	11,253.962	11,257.799	11,138.4756	10,994.9821	10,973.8756		10,827.3493	10,818.0666	10,724.993	10,583.559	10,536.0027	10,550.4955	10,593.0723	10,530.7671	10,528.0058	10,534.932	10,472.3605	10,527.3501	10,489.6299	10,538.0724	10,631.6377	10,619.4605	10,652.1807	10,653.0567	10,701.3353	10,638.3641	10,589.3632	10,608.4411	10,555.767		10,490.5008	10,485.7672	10,437.2888	10,409.1588	10,401.8279	10,584.9473	10,628.8508	10,614.6706	10,641.9861	10,611.9298	10,462.0531	10,474.0715	10,446.3359	10,371.956	10,321.7051	10,196.936	10,231.0957	10,257.2791	10,267.8682	10,199.1337	10,207.7402	10,171.3008	10,232.4021	10,231.4031	10,235.0557	10,185.2608	10,256.6848	10,089.052	10,121.0909	10,070.3226	10,000
Bloomberg U S Aggregate Total Return Value Index 996 [Member]
Account Value [Line Items]
Account Value	12,004.424	11,845.8158	11,678.0004	11,411.4668	11,304.4398	11,115.9877	11,404.0404	11,299.6979	11,461.6339	11,493.195	11,069.4673	10,589.8898		10,759.6881	11,040.24	11,111.2139	11,118.9646	11,158.7602		11,281.6023	11,213.6426	10,935.8444	11,226.0979	10,891.0465	10,940.3949	10,552.327	10,690.7981	11,173.5652	11,498.4738	11,224.2161	11,403.1101	11,330.0576	11,776.9683	12,113.503	12,250.172		12,519.9004	12,552.0197	12,514.9938	12,518.4439	12,627.7727	12,651.8595	12,511.9637	12,424.6696	12,384.2096	12,287.1394	12,442.5048	12,624.817	12,715.9864	12,698.4914	12,575.0965	12,631.4992	12,638.4313	12,741.2746	12,553.758	12,475.1769	12,417.3601	12,200.4833	12,272.7065	12,055.7234	11,828.0976	11,836.3427	11,842.3764	11,806.8123	11,870.0302	11,570.2238	11,544.8346	11,401.6482	11,202.782	11,199.9166		10,988.9087	10,995.2773	10,879.7393	10,683.4727	10,620.0741	10,704.6676	10,774.0467	10,705.1619	10,702.6209	10,715.7993	10,639.8655	10,719.5896	10,651.2843	10,753.2186	10,878.506	10,828.8068	10,842.724	10,836.4459	10,888.3034	10,791.5097	10,745.2712	10,756.0945	10,673.9358		10,592.197	10,597.7522	10,527.0016	10,506.3861	10,491.5864	10,745.7655	10,828.5941	10,834.9414	10,847.3436	10,779.1979	10,588.9383	10,586.2218	10,545.7404	10,449.8664	10,376.2558	10,235.4031	10,268.5908	10,295.7875	10,294.0811	10,224.9146	10,239.6187	10,168.9318	10,281.0356	10,305.856	10,342.967	10,295.1602	10,392.8789	10,179.4256	10,169.91	10,098.2769	10,000
Bloomberg Intermediate U S Government Credit Total Return Index 1018 [Member]
Account Value [Line Items]
Account Value	12,147.2281	12,016.8903	11,880.1489	11,660.9742	11,568.7101	11,430.8211	11,587.1629	11,513.2748	11,628.8278	11,604.5809	11,341.6308	11,047.2002		11,098.5986	11,219.4692	11,221.0881	11,191.7746	11,268.3779		11,352.4197	11,283.5469	11,030.3918	11,232.1434	11,026.4011	11,046.3498	10,811.5758	10,859.3626	11,157.6558	11,385.3397	11,202.4406	11,328.4034	11,244.7048	11,474.0792	11,761.9166	11,839.6059		12,015.8862	12,031.3473	12,017.4282	12,084.8973	12,154.7844	12,174.5385	12,082.0592	12,072.2334	12,023.96	11,964.6876	12,058.3042	12,157.6584	12,191.48	12,166.4545	12,106.4393	12,133.0427	12,134.5437	12,148.934	12,058.8984	11,984.9847	11,894.5341	11,729.4064	11,781.061	11,617.0809	11,454.4942	11,440.1193	11,457.2248	11,411.9738	11,453.5004	11,253.962	11,257.799	11,138.4756	10,994.9821	10,973.8756		10,827.3493	10,818.0666	10,724.993	10,583.559	10,536.0027	10,550.4955	10,593.0723	10,530.7671	10,528.0058	10,534.932	10,472.3605	10,527.3501	10,489.6299	10,538.0724	10,631.6377	10,619.4605	10,652.1807	10,653.0567	10,701.3353	10,638.3641	10,589.3632	10,608.4411	10,555.767		10,490.5008	10,485.7672	10,437.2888	10,409.1588	10,401.8279	10,584.9473	10,628.8508	10,614.6706	10,641.9861	10,611.9298	10,462.0531	10,474.0715	10,446.3359	10,371.956	10,321.7051	10,196.936	10,231.0957	10,257.2791	10,267.8682	10,199.1337	10,207.7402	10,171.3008	10,232.4021	10,231.4031	10,235.0557	10,185.2608	10,256.6848	10,089.052	10,121.0909	10,070.3226	10,000
Bloomberg U S Aggregate Total Return Value Index 1019 [Member]
Account Value [Line Items]
Account Value	12,004.424	11,845.8158	11,678.0004	11,411.4668	11,304.4398	11,115.9877	11,404.0404	11,299.6979	11,461.6339	11,493.195	11,069.4673	10,589.8898		10,759.6881	11,040.24	11,111.2139	11,118.9646	11,158.7602		11,281.6023	11,213.6426	10,935.8444	11,226.0979	10,891.0465	10,940.3949	10,552.327	10,690.7981	11,173.5652	11,498.4738	11,224.2161	11,403.1101	11,330.0576	11,776.9683	12,113.503	12,250.172		12,519.9004	12,552.0197	12,514.9938	12,518.4439	12,627.7727	12,651.8595	12,511.9637	12,424.6696	12,384.2096	12,287.1394	12,442.5048	12,624.817	12,715.9864	12,698.4914	12,575.0965	12,631.4992	12,638.4313	12,741.2746	12,553.758	12,475.1769	12,417.3601	12,200.4833	12,272.7065	12,055.7234	11,828.0976	11,836.3427	11,842.3764	11,806.8123	11,870.0302	11,570.2238	11,544.8346	11,401.6482	11,202.782	11,199.9166		10,988.9087	10,995.2773	10,879.7393	10,683.4727	10,620.0741	10,704.6676	10,774.0467	10,705.1619	10,702.6209	10,715.7993	10,639.8655	10,719.5896	10,651.2843	10,753.2186	10,878.506	10,828.8068	10,842.724	10,836.4459	10,888.3034	10,791.5097	10,745.2712	10,756.0945	10,673.9358		10,592.197	10,597.7522	10,527.0016	10,506.3861	10,491.5864	10,745.7655	10,828.5941	10,834.9414	10,847.3436	10,779.1979	10,588.9383	10,586.2218	10,545.7404	10,449.8664	10,376.2558	10,235.4031	10,268.5908	10,295.7875	10,294.0811	10,224.9146	10,239.6187	10,168.9318	10,281.0356	10,305.856	10,342.967	10,295.1602	10,392.8789	10,179.4256	10,169.91	10,098.2769	10,000
Bloomberg Intermediate U S Government Credit Total Return Index 1041 [Member]
Account Value [Line Items]
Account Value	11,559.969	11,435.9324	11,305.8017	11,097.2231	11,009.4195	10,878.1968	11,026.9802	10,956.6642	11,066.6308	11,043.5561	10,793.3183	10,513.122		10,562.0356	10,677.0627	10,678.6033	10,650.707	10,723.6069		10,803.5857	10,738.0425	10,497.1263	10,689.1241	10,493.3284	10,512.3127	10,288.8889	10,334.3654	10,618.2377	10,834.9141	10,660.8573	10,780.7304	10,701.0783	10,919.3635	11,193.2854	11,267.2188		11,434.9768	11,449.6904	11,436.4443	11,500.6516	11,567.16	11,585.959	11,497.9507	11,488.5999	11,442.6603	11,386.2534	11,475.3441	11,569.895	11,602.0815	11,578.2659	11,521.1521	11,546.4694	11,547.8978	11,561.5924	11,475.9096	11,405.5692	11,319.4915	11,162.3469	11,211.5043	11,055.4518	10,900.7254	10,887.0454	10,903.3239	10,860.2607	10,899.7796	10,709.8879	10,713.5394	10,599.9847	10,463.4284	10,443.3423		10,303.8999	10,295.0659	10,206.492	10,071.8956	10,026.6385	10,040.4306	10,080.949	10,021.6559	10,019.0282	10,025.6195	9,966.073	10,018.4041	9,982.5075	10,028.6081	10,117.65	10,106.0615	10,137.1998	10,138.0335	10,183.978	10,124.0512	10,077.4193	10,095.5748	10,045.4473	10,000
Bloomberg U S Aggregate Total Return Value Index 1042 [Member]
Account Value [Line Items]
Account Value	11,305.8365	11,156.4585	10,998.4089	10,747.386	10,646.5874	10,469.102	10,740.3918	10,642.1215	10,794.6337	10,824.3581	10,425.2889	9,973.62		10,133.5371	10,397.7624	10,464.6061	10,471.9057	10,509.3854		10,625.0789	10,561.074	10,299.4421	10,572.8045	10,257.2511	10,303.7277	9,938.2431	10,068.656	10,523.3289	10,829.3297	10,571.0322	10,739.5156	10,670.7144	11,091.6175	11,408.5678	11,537.2834		11,791.3153	11,821.5654	11,786.6942	11,789.9435	11,892.91	11,915.5951	11,783.8404	11,701.6264	11,663.5208	11,572.0996	11,718.4236	11,890.1263	11,975.9902	11,959.5133	11,843.2992	11,896.4197	11,902.9483	11,999.8067	11,823.2026	11,749.1944	11,694.7422	11,490.4864	11,558.5066	11,354.1506	11,139.7713	11,147.5366	11,153.2192	11,119.7248	11,179.2637	10,896.9043	10,872.9926	10,738.1388	10,550.8454	10,548.1468		10,349.4183	10,355.4163	10,246.602	10,061.7569	10,002.0477	10,081.7184	10,147.06	10,082.184	10,079.7908	10,092.2023	10,020.6874	10,095.772	10,031.4417	10,127.444	10,245.4405	10,198.6334	10,211.7408	10,205.8279	10,254.6677	10,163.5068	10,119.9591	10,130.1526	10,052.775	10,000
Bloomberg U S Aggregate Total Return Value Index 1064 [Member]
Account Value [Line Items]
Account Value	11,233.9842	11,085.5555	10,928.5103	10,679.0828	10,578.9248	10,402.5674	10,672.133	10,574.4872	10,726.0302	10,755.5657	10,359.0328	9,910.2343	10,000
Bloomberg U S Aggregate Total Return Value Index 1086 [Member]
Account Value [Line Items]
Account Value	11,233.9842	11,085.5555	10,928.5103	10,679.0828	10,578.9248	10,402.5674	10,672.133	10,574.4872	10,726.0302	10,755.5657	10,359.0328	9,910.2343	10,000
Bloomberg U S Aggregate Total Return Value Index 1108 [Member]
Account Value [Line Items]
Account Value	11,233.9842	11,085.5555	10,928.5103	10,679.0828	10,578.9248	10,402.5674	10,672.133	10,574.4872	10,726.0302	10,755.5657	10,359.0328	9,910.2343	10,000
Bloomberg U S Aggregate Total Return Value Index 1129 [Member]
Account Value [Line Items]
Account Value	11,233.9842	11,085.5555	10,928.5103	10,679.0828	10,578.9248	10,402.5674	10,672.133	10,574.4872	10,726.0302	10,755.5657	10,359.0328	9,910.2343	10,000
Bloomberg U S Aggregate Total Return Value Index 1150 [Member]
Account Value [Line Items]
Account Value	11,233.9842	11,085.5555	10,928.5103	10,679.0828	10,578.9248	10,402.5674	10,672.133	10,574.4872	10,726.0302	10,755.5657	10,359.0328	9,910.2343	10,000
Bloomberg U S Aggregate Total Return Value Index 1171 [Member]
Account Value [Line Items]
Account Value	11,233.9842	11,085.5555	10,928.5103	10,679.0828	10,578.9248	10,402.5674	10,672.133	10,574.4872	10,726.0302	10,755.5657	10,359.0328	9,910.2343	10,000
Bloomberg U S Aggregate Total Return Value Index 1192 [Member]
Account Value [Line Items]
Account Value	11,233.9842	11,085.5555	10,928.5103	10,679.0828	10,578.9248	10,402.5674	10,672.133	10,574.4872	10,726.0302	10,755.5657	10,359.0328	9,910.2343	10,000
Bloomberg U S Universal Total Return Index 1213 [Member]
Account Value [Line Items]
Account Value	12,372.5481	12,205.1518	12,028.0752	11,761.1264	11,654.5813	11,464.5503	11,738.8554	11,624.7317	11,765.7948	11,794.0277	11,362.8555	10,873.4999		11,039.5219	11,309.1788	11,377.7096	11,366.4124	11,384.0958		11,503.3528	11,433.5083	11,171.4301	11,452.8489	11,108.275	11,146.1276	10,745.472	10,864.6885	11,353.842	11,656.8852	11,371	11,602.8447	11,539.3461	11,986.4232	12,316.8706	12,487.1164		12,767.0195	12,775.6288	12,760.2291	12,770.6573	12,880.6582	12,889.2473	12,761.1183	12,668.7604	12,620.6211	12,515.3896	12,662.7379	12,828.2749	12,909.4165	12,864.9755	12,699.2567	12,744.8092	12,767.8279	12,841.8759	12,620.1967	12,515.7534	12,399.9523	12,156.4467	12,398.6185	12,215.7215	12,000.3476	11,982.4823	11,984.8873	11,946.2869	11,998.266	11,732.7723	11,697.9511	11,534.8191	11,360.7739	11,344.9094		11,143.6621	11,131.5363	10,980.1461	10,810.9916	10,762.5896	10,853.3914	10,900.0958	10,846.6616	10,824.0066	10,839.7297	10,780.9399	10,853.351	10,798.886	10,902.2582	11,008.197	10,959.8758	10,976.4881	10,963.3317	11,002.0533	10,907.9371	10,853.8764	10,863.0718	10,779.9092		10,691.2092	10,694.7863	10,612.897	10,575.59	10,544.2651	10,786.7199	10,858.7671	10,856.1803	10,844.4789	10,755.8396	10,569.7697	10,561.5241	10,490.0427	10,363.0455	10,289.9473	10,177.6021	10,228.692	10,266.1404	10,233.421	10,193.5273	10,223.6598	10,164.4658	10,279.1756	10,297.2026	10,309.1667	10,266.7871	10,326.9713	10,134.0706	10,152.4007	10,097.9156	10,000
Thornburg Strategic Income Funds Blended Index 1214 [Member]
Account Value [Line Items]
Account Value	14,243.8138	14,041.9705	13,810.2039	13,510.1462	13,354.6483	13,060.87	13,432.0791	13,249.0534	13,286.5653	13,283.8655	12,767.5212	12,102.1509		12,329.3555	12,697.0243	12,823.8162	12,745.2937	12,628.574		12,765.2599	12,659.4992	12,332.6595	12,655.2662	12,183.0234	12,332.2684	11,820.1424	11,773.0422	12,433.995	12,831.3419	12,392.3213	12,773.942	12,706.4755	13,332.7546	13,559.6996	13,752.0001		14,145.4901	14,054.1256	14,082.5127	13,927.8078	14,143.214	14,094.5228	13,920.1403	13,801.4253	13,726.0044	13,514.7933	13,560.0148	13,647.7392	13,753.9673	13,623.4342	13,182.8319	13,312.0547	13,410.469	13,318.4978	13,037.9479	12,904.6506	12,734.1838	12,290.8562	12,686.372	12,718.2487	12,540.447	12,472.666	12,408.6071	12,316.245	12,316.2999	12,114.7278	12,081.5035	11,807.2714	11,775.9355	11,690.6344		11,484.0545	11,420.6629	11,152.3723	11,158.0714	11,079.9828	11,317.7408	11,363.6265	11,277.6641	11,205.5381	11,217.6448	11,140.0801	11,180.908	11,172.294	11,352.4461	11,337.1814	11,265.3495	11,228.2216	11,180.7795	11,173.1962	11,090.4925	10,999.9736	11,000.3642	10,887.2607		10,788.7073	10,770.279	10,653.881	10,586.1638	10,523.9235	10,695.5582	10,803.4833	10,797.0727	10,805.1599	10,661.1569	10,533.354	10,519.3782	10,454.1897	10,240.0546	10,197.36	10,207.116	10,269.7724	10,301.7941	10,139.7461	10,159.713	10,307.9799	10,214.5069	10,352.9634	10,365.7936	10,346.9614	10,340.9202	10,297.7135	10,164.0428	10,189.2764	10,091.5595	10,000
Bloomberg U S Aggregate Total Return Value Index 1215 [Member]
Account Value [Line Items]
Account Value	12,004.424	11,845.8158	11,678.0004	11,411.4668	11,304.4398	11,115.9877	11,404.0404	11,299.6979	11,461.6339	11,493.195	11,069.4673	10,589.8898		10,759.6881	11,040.24	11,111.2139	11,118.9646	11,158.7602		11,281.6023	11,213.6426	10,935.8444	11,226.0979	10,891.0465	10,940.3949	10,552.327	10,690.7981	11,173.5652	11,498.4738	11,224.2161	11,403.1101	11,330.0576	11,776.9683	12,113.503	12,250.172		12,519.9004	12,552.0197	12,514.9938	12,518.4439	12,627.7727	12,651.8595	12,511.9637	12,424.6696	12,384.2096	12,287.1394	12,442.5048	12,624.817	12,715.9864	12,698.4914	12,575.0965	12,631.4992	12,638.4313	12,741.2746	12,553.758	12,475.1769	12,417.3601	12,200.4833	12,272.7065	12,055.7234	11,828.0976	11,836.3427	11,842.3764	11,806.8123	11,870.0302	11,570.2238	11,544.8346	11,401.6482	11,202.782	11,199.9166		10,988.9087	10,995.2773	10,879.7393	10,683.4727	10,620.0741	10,704.6676	10,774.0467	10,705.1619	10,702.6209	10,715.7993	10,639.8655	10,719.5896	10,651.2843	10,753.2186	10,878.506	10,828.8068	10,842.724	10,836.4459	10,888.3034	10,791.5097	10,745.2712	10,756.0945	10,673.9358		10,592.197	10,597.7522	10,527.0016	10,506.3861	10,491.5864	10,745.7655	10,828.5941	10,834.9414	10,847.3436	10,779.1979	10,588.9383	10,586.2218	10,545.7404	10,449.8664	10,376.2558	10,235.4031	10,268.5908	10,295.7875	10,294.0811	10,224.9146	10,239.6187	10,168.9318	10,281.0356	10,305.856	10,342.967	10,295.1602	10,392.8789	10,179.4256	10,169.91	10,098.2769	10,000
Bloomberg U S Universal Total Return Index 1244 [Member]
Account Value [Line Items]
Account Value	12,372.5481	12,205.1518	12,028.0752	11,761.1264	11,654.5813	11,464.5503	11,738.8554	11,624.7317	11,765.7948	11,794.0277	11,362.8555	10,873.4999		11,039.5219	11,309.1788	11,377.7096	11,366.4124	11,384.0958		11,503.3528	11,433.5083	11,171.4301	11,452.8489	11,108.275	11,146.1276	10,745.472	10,864.6885	11,353.842	11,656.8852	11,371	11,602.8447	11,539.3461	11,986.4232	12,316.8706	12,487.1164		12,767.0195	12,775.6288	12,760.2291	12,770.6573	12,880.6582	12,889.2473	12,761.1183	12,668.7604	12,620.6211	12,515.3896	12,662.7379	12,828.2749	12,909.4165	12,864.9755	12,699.2567	12,744.8092	12,767.8279	12,841.8759	12,620.1967	12,515.7534	12,399.9523	12,156.4467	12,398.6185	12,215.7215	12,000.3476	11,982.4823	11,984.8873	11,946.2869	11,998.266	11,732.7723	11,697.9511	11,534.8191	11,360.7739	11,344.9094		11,143.6621	11,131.5363	10,980.1461	10,810.9916	10,762.5896	10,853.3914	10,900.0958	10,846.6616	10,824.0066	10,839.7297	10,780.9399	10,853.351	10,798.886	10,902.2582	11,008.197	10,959.8758	10,976.4881	10,963.3317	11,002.0533	10,907.9371	10,853.8764	10,863.0718	10,779.9092		10,691.2092	10,694.7863	10,612.897	10,575.59	10,544.2651	10,786.7199	10,858.7671	10,856.1803	10,844.4789	10,755.8396	10,569.7697	10,561.5241	10,490.0427	10,363.0455	10,289.9473	10,177.6021	10,228.692	10,266.1404	10,233.421	10,193.5273	10,223.6598	10,164.4658	10,279.1756	10,297.2026	10,309.1667	10,266.7871	10,326.9713	10,134.0706	10,152.4007	10,097.9156	10,000
Thornburg Strategic Income Funds Blended Index 1245 [Member]
Account Value [Line Items]
Account Value	14,243.8138	14,041.9705	13,810.2039	13,510.1462	13,354.6483	13,060.87	13,432.0791	13,249.0534	13,286.5653	13,283.8655	12,767.5212	12,102.1509		12,329.3555	12,697.0243	12,823.8162	12,745.2937	12,628.574		12,765.2599	12,659.4992	12,332.6595	12,655.2662	12,183.0234	12,332.2684	11,820.1424	11,773.0422	12,433.995	12,831.3419	12,392.3213	12,773.942	12,706.4755	13,332.7546	13,559.6996	13,752.0001		14,145.4901	14,054.1256	14,082.5127	13,927.8078	14,143.214	14,094.5228	13,920.1403	13,801.4253	13,726.0044	13,514.7933	13,560.0148	13,647.7392	13,753.9673	13,623.4342	13,182.8319	13,312.0547	13,410.469	13,318.4978	13,037.9479	12,904.6506	12,734.1838	12,290.8562	12,686.372	12,718.2487	12,540.447	12,472.666	12,408.6071	12,316.245	12,316.2999	12,114.7278	12,081.5035	11,807.2714	11,775.9355	11,690.6344		11,484.0545	11,420.6629	11,152.3723	11,158.0714	11,079.9828	11,317.7408	11,363.6265	11,277.6641	11,205.5381	11,217.6448	11,140.0801	11,180.908	11,172.294	11,352.4461	11,337.1814	11,265.3495	11,228.2216	11,180.7795	11,173.1962	11,090.4925	10,999.9736	11,000.3642	10,887.2607		10,788.7073	10,770.279	10,653.881	10,586.1638	10,523.9235	10,695.5582	10,803.4833	10,797.0727	10,805.1599	10,661.1569	10,533.354	10,519.3782	10,454.1897	10,240.0546	10,197.36	10,207.116	10,269.7724	10,301.7941	10,139.7461	10,159.713	10,307.9799	10,214.5069	10,352.9634	10,365.7936	10,346.9614	10,340.9202	10,297.7135	10,164.0428	10,189.2764	10,091.5595	10,000
Bloomberg U S Aggregate Total Return Value Index 1246 [Member]
Account Value [Line Items]
Account Value	12,004.424	11,845.8158	11,678.0004	11,411.4668	11,304.4398	11,115.9877	11,404.0404	11,299.6979	11,461.6339	11,493.195	11,069.4673	10,589.8898		10,759.6881	11,040.24	11,111.2139	11,118.9646	11,158.7602		11,281.6023	11,213.6426	10,935.8444	11,226.0979	10,891.0465	10,940.3949	10,552.327	10,690.7981	11,173.5652	11,498.4738	11,224.2161	11,403.1101	11,330.0576	11,776.9683	12,113.503	12,250.172		12,519.9004	12,552.0197	12,514.9938	12,518.4439	12,627.7727	12,651.8595	12,511.9637	12,424.6696	12,384.2096	12,287.1394	12,442.5048	12,624.817	12,715.9864	12,698.4914	12,575.0965	12,631.4992	12,638.4313	12,741.2746	12,553.758	12,475.1769	12,417.3601	12,200.4833	12,272.7065	12,055.7234	11,828.0976	11,836.3427	11,842.3764	11,806.8123	11,870.0302	11,570.2238	11,544.8346	11,401.6482	11,202.782	11,199.9166		10,988.9087	10,995.2773	10,879.7393	10,683.4727	10,620.0741	10,704.6676	10,774.0467	10,705.1619	10,702.6209	10,715.7993	10,639.8655	10,719.5896	10,651.2843	10,753.2186	10,878.506	10,828.8068	10,842.724	10,836.4459	10,888.3034	10,791.5097	10,745.2712	10,756.0945	10,673.9358		10,592.197	10,597.7522	10,527.0016	10,506.3861	10,491.5864	10,745.7655	10,828.5941	10,834.9414	10,847.3436	10,779.1979	10,588.9383	10,586.2218	10,545.7404	10,449.8664	10,376.2558	10,235.4031	10,268.5908	10,295.7875	10,294.0811	10,224.9146	10,239.6187	10,168.9318	10,281.0356	10,305.856	10,342.967	10,295.1602	10,392.8789	10,179.4256	10,169.91	10,098.2769	10,000
Bloomberg U S Universal Total Return Index 1275 [Member]
Account Value [Line Items]
Account Value	12,372.5481	12,205.1518	12,028.0752	11,761.1264	11,654.5813	11,464.5503	11,738.8554	11,624.7317	11,765.7948	11,794.0277	11,362.8555	10,873.4999		11,039.5219	11,309.1788	11,377.7096	11,366.4124	11,384.0958		11,503.3528	11,433.5083	11,171.4301	11,452.8489	11,108.275	11,146.1276	10,745.472	10,864.6885	11,353.842	11,656.8852	11,371	11,602.8447	11,539.3461	11,986.4232	12,316.8706	12,487.1164		12,767.0195	12,775.6288	12,760.2291	12,770.6573	12,880.6582	12,889.2473	12,761.1183	12,668.7604	12,620.6211	12,515.3896	12,662.7379	12,828.2749	12,909.4165	12,864.9755	12,699.2567	12,744.8092	12,767.8279	12,841.8759	12,620.1967	12,515.7534	12,399.9523	12,156.4467	12,398.6185	12,215.7215	12,000.3476	11,982.4823	11,984.8873	11,946.2869	11,998.266	11,732.7723	11,697.9511	11,534.8191	11,360.7739	11,344.9094		11,143.6621	11,131.5363	10,980.1461	10,810.9916	10,762.5896	10,853.3914	10,900.0958	10,846.6616	10,824.0066	10,839.7297	10,780.9399	10,853.351	10,798.886	10,902.2582	11,008.197	10,959.8758	10,976.4881	10,963.3317	11,002.0533	10,907.9371	10,853.8764	10,863.0718	10,779.9092		10,691.2092	10,694.7863	10,612.897	10,575.59	10,544.2651	10,786.7199	10,858.7671	10,856.1803	10,844.4789	10,755.8396	10,569.7697	10,561.5241	10,490.0427	10,363.0455	10,289.9473	10,177.6021	10,228.692	10,266.1404	10,233.421	10,193.5273	10,223.6598	10,164.4658	10,279.1756	10,297.2026	10,309.1667	10,266.7871	10,326.9713	10,134.0706	10,152.4007	10,097.9156	10,000
Thornburg Strategic Income Funds Blended Index 1276 [Member]
Account Value [Line Items]
Account Value	14,243.8138	14,041.9705	13,810.2039	13,510.1462	13,354.6483	13,060.87	13,432.0791	13,249.0534	13,286.5653	13,283.8655	12,767.5212	12,102.1509		12,329.3555	12,697.0243	12,823.8162	12,745.2937	12,628.574		12,765.2599	12,659.4992	12,332.6595	12,655.2662	12,183.0234	12,332.2684	11,820.1424	11,773.0422	12,433.995	12,831.3419	12,392.3213	12,773.942	12,706.4755	13,332.7546	13,559.6996	13,752.0001		14,145.4901	14,054.1256	14,082.5127	13,927.8078	14,143.214	14,094.5228	13,920.1403	13,801.4253	13,726.0044	13,514.7933	13,560.0148	13,647.7392	13,753.9673	13,623.4342	13,182.8319	13,312.0547	13,410.469	13,318.4978	13,037.9479	12,904.6506	12,734.1838	12,290.8562	12,686.372	12,718.2487	12,540.447	12,472.666	12,408.6071	12,316.245	12,316.2999	12,114.7278	12,081.5035	11,807.2714	11,775.9355	11,690.6344		11,484.0545	11,420.6629	11,152.3723	11,158.0714	11,079.9828	11,317.7408	11,363.6265	11,277.6641	11,205.5381	11,217.6448	11,140.0801	11,180.908	11,172.294	11,352.4461	11,337.1814	11,265.3495	11,228.2216	11,180.7795	11,173.1962	11,090.4925	10,999.9736	11,000.3642	10,887.2607		10,788.7073	10,770.279	10,653.881	10,586.1638	10,523.9235	10,695.5582	10,803.4833	10,797.0727	10,805.1599	10,661.1569	10,533.354	10,519.3782	10,454.1897	10,240.0546	10,197.36	10,207.116	10,269.7724	10,301.7941	10,139.7461	10,159.713	10,307.9799	10,214.5069	10,352.9634	10,365.7936	10,346.9614	10,340.9202	10,297.7135	10,164.0428	10,189.2764	10,091.5595	10,000
Bloomberg U S Aggregate Total Return Value Index 1277 [Member]
Account Value [Line Items]
Account Value	12,004.424	11,845.8158	11,678.0004	11,411.4668	11,304.4398	11,115.9877	11,404.0404	11,299.6979	11,461.6339	11,493.195	11,069.4673	10,589.8898		10,759.6881	11,040.24	11,111.2139	11,118.9646	11,158.7602		11,281.6023	11,213.6426	10,935.8444	11,226.0979	10,891.0465	10,940.3949	10,552.327	10,690.7981	11,173.5652	11,498.4738	11,224.2161	11,403.1101	11,330.0576	11,776.9683	12,113.503	12,250.172		12,519.9004	12,552.0197	12,514.9938	12,518.4439	12,627.7727	12,651.8595	12,511.9637	12,424.6696	12,384.2096	12,287.1394	12,442.5048	12,624.817	12,715.9864	12,698.4914	12,575.0965	12,631.4992	12,638.4313	12,741.2746	12,553.758	12,475.1769	12,417.3601	12,200.4833	12,272.7065	12,055.7234	11,828.0976	11,836.3427	11,842.3764	11,806.8123	11,870.0302	11,570.2238	11,544.8346	11,401.6482	11,202.782	11,199.9166		10,988.9087	10,995.2773	10,879.7393	10,683.4727	10,620.0741	10,704.6676	10,774.0467	10,705.1619	10,702.6209	10,715.7993	10,639.8655	10,719.5896	10,651.2843	10,753.2186	10,878.506	10,828.8068	10,842.724	10,836.4459	10,888.3034	10,791.5097	10,745.2712	10,756.0945	10,673.9358		10,592.197	10,597.7522	10,527.0016	10,506.3861	10,491.5864	10,745.7655	10,828.5941	10,834.9414	10,847.3436	10,779.1979	10,588.9383	10,586.2218	10,545.7404	10,449.8664	10,376.2558	10,235.4031	10,268.5908	10,295.7875	10,294.0811	10,224.9146	10,239.6187	10,168.9318	10,281.0356	10,305.856	10,342.967	10,295.1602	10,392.8789	10,179.4256	10,169.91	10,098.2769	10,000
Bloomberg U S Universal Total Return Index 1305 [Member]
Account Value [Line Items]
Account Value	12,372.5481	12,205.1518	12,028.0752	11,761.1264	11,654.5813	11,464.5503	11,738.8554	11,624.7317	11,765.7948	11,794.0277	11,362.8555	10,873.4999		11,039.5219	11,309.1788	11,377.7096	11,366.4124	11,384.0958		11,503.3528	11,433.5083	11,171.4301	11,452.8489	11,108.275	11,146.1276	10,745.472	10,864.6885	11,353.842	11,656.8852	11,371	11,602.8447	11,539.3461	11,986.4232	12,316.8706	12,487.1164		12,767.0195	12,775.6288	12,760.2291	12,770.6573	12,880.6582	12,889.2473	12,761.1183	12,668.7604	12,620.6211	12,515.3896	12,662.7379	12,828.2749	12,909.4165	12,864.9755	12,699.2567	12,744.8092	12,767.8279	12,841.8759	12,620.1967	12,515.7534	12,399.9523	12,156.4467	12,398.6185	12,215.7215	12,000.3476	11,982.4823	11,984.8873	11,946.2869	11,998.266	11,732.7723	11,697.9511	11,534.8191	11,360.7739	11,344.9094		11,143.6621	11,131.5363	10,980.1461	10,810.9916	10,762.5896	10,853.3914	10,900.0958	10,846.6616	10,824.0066	10,839.7297	10,780.9399	10,853.351	10,798.886	10,902.2582	11,008.197	10,959.8758	10,976.4881	10,963.3317	11,002.0533	10,907.9371	10,853.8764	10,863.0718	10,779.9092		10,691.2092	10,694.7863	10,612.897	10,575.59	10,544.2651	10,786.7199	10,858.7671	10,856.1803	10,844.4789	10,755.8396	10,569.7697	10,561.5241	10,490.0427	10,363.0455	10,289.9473	10,177.6021	10,228.692	10,266.1404	10,233.421	10,193.5273	10,223.6598	10,164.4658	10,279.1756	10,297.2026	10,309.1667	10,266.7871	10,326.9713	10,134.0706	10,152.4007	10,097.9156	10,000
Thornburg Strategic Income Funds Blended Index 1306 [Member]
Account Value [Line Items]
Account Value	14,243.8138	14,041.9705	13,810.2039	13,510.1462	13,354.6483	13,060.87	13,432.0791	13,249.0534	13,286.5653	13,283.8655	12,767.5212	12,102.1509		12,329.3555	12,697.0243	12,823.8162	12,745.2937	12,628.574		12,765.2599	12,659.4992	12,332.6595	12,655.2662	12,183.0234	12,332.2684	11,820.1424	11,773.0422	12,433.995	12,831.3419	12,392.3213	12,773.942	12,706.4755	13,332.7546	13,559.6996	13,752.0001		14,145.4901	14,054.1256	14,082.5127	13,927.8078	14,143.214	14,094.5228	13,920.1403	13,801.4253	13,726.0044	13,514.7933	13,560.0148	13,647.7392	13,753.9673	13,623.4342	13,182.8319	13,312.0547	13,410.469	13,318.4978	13,037.9479	12,904.6506	12,734.1838	12,290.8562	12,686.372	12,718.2487	12,540.447	12,472.666	12,408.6071	12,316.245	12,316.2999	12,114.7278	12,081.5035	11,807.2714	11,775.9355	11,690.6344		11,484.0545	11,420.6629	11,152.3723	11,158.0714	11,079.9828	11,317.7408	11,363.6265	11,277.6641	11,205.5381	11,217.6448	11,140.0801	11,180.908	11,172.294	11,352.4461	11,337.1814	11,265.3495	11,228.2216	11,180.7795	11,173.1962	11,090.4925	10,999.9736	11,000.3642	10,887.2607		10,788.7073	10,770.279	10,653.881	10,586.1638	10,523.9235	10,695.5582	10,803.4833	10,797.0727	10,805.1599	10,661.1569	10,533.354	10,519.3782	10,454.1897	10,240.0546	10,197.36	10,207.116	10,269.7724	10,301.7941	10,139.7461	10,159.713	10,307.9799	10,214.5069	10,352.9634	10,365.7936	10,346.9614	10,340.9202	10,297.7135	10,164.0428	10,189.2764	10,091.5595	10,000
Bloomberg U S Aggregate Total Return Value Index 1307 [Member]
Account Value [Line Items]
Account Value	12,004.424	11,845.8158	11,678.0004	11,411.4668	11,304.4398	11,115.9877	11,404.0404	11,299.6979	11,461.6339	11,493.195	11,069.4673	10,589.8898		10,759.6881	11,040.24	11,111.2139	11,118.9646	11,158.7602		11,281.6023	11,213.6426	10,935.8444	11,226.0979	10,891.0465	10,940.3949	10,552.327	10,690.7981	11,173.5652	11,498.4738	11,224.2161	11,403.1101	11,330.0576	11,776.9683	12,113.503	12,250.172		12,519.9004	12,552.0197	12,514.9938	12,518.4439	12,627.7727	12,651.8595	12,511.9637	12,424.6696	12,384.2096	12,287.1394	12,442.5048	12,624.817	12,715.9864	12,698.4914	12,575.0965	12,631.4992	12,638.4313	12,741.2746	12,553.758	12,475.1769	12,417.3601	12,200.4833	12,272.7065	12,055.7234	11,828.0976	11,836.3427	11,842.3764	11,806.8123	11,870.0302	11,570.2238	11,544.8346	11,401.6482	11,202.782	11,199.9166		10,988.9087	10,995.2773	10,879.7393	10,683.4727	10,620.0741	10,704.6676	10,774.0467	10,705.1619	10,702.6209	10,715.7993	10,639.8655	10,719.5896	10,651.2843	10,753.2186	10,878.506	10,828.8068	10,842.724	10,836.4459	10,888.3034	10,791.5097	10,745.2712	10,756.0945	10,673.9358		10,592.197	10,597.7522	10,527.0016	10,506.3861	10,491.5864	10,745.7655	10,828.5941	10,834.9414	10,847.3436	10,779.1979	10,588.9383	10,586.2218	10,545.7404	10,449.8664	10,376.2558	10,235.4031	10,268.5908	10,295.7875	10,294.0811	10,224.9146	10,239.6187	10,168.9318	10,281.0356	10,305.856	10,342.967	10,295.1602	10,392.8789	10,179.4256	10,169.91	10,098.2769	10,000
Bloomberg U S Universal Total Return Index 1335 [Member]
Account Value [Line Items]
Account Value	12,372.5481	12,205.1518	12,028.0752	11,761.1264	11,654.5813	11,464.5503	11,738.8554	11,624.7317	11,765.7948	11,794.0277	11,362.8555	10,873.4999		11,039.5219	11,309.1788	11,377.7096	11,366.4124	11,384.0958		11,503.3528	11,433.5083	11,171.4301	11,452.8489	11,108.275	11,146.1276	10,745.472	10,864.6885	11,353.842	11,656.8852	11,371	11,602.8447	11,539.3461	11,986.4232	12,316.8706	12,487.1164		12,767.0195	12,775.6288	12,760.2291	12,770.6573	12,880.6582	12,889.2473	12,761.1183	12,668.7604	12,620.6211	12,515.3896	12,662.7379	12,828.2749	12,909.4165	12,864.9755	12,699.2567	12,744.8092	12,767.8279	12,841.8759	12,620.1967	12,515.7534	12,399.9523	12,156.4467	12,398.6185	12,215.7215	12,000.3476	11,982.4823	11,984.8873	11,946.2869	11,998.266	11,732.7723	11,697.9511	11,534.8191	11,360.7739	11,344.9094		11,143.6621	11,131.5363	10,980.1461	10,810.9916	10,762.5896	10,853.3914	10,900.0958	10,846.6616	10,824.0066	10,839.7297	10,780.9399	10,853.351	10,798.886	10,902.2582	11,008.197	10,959.8758	10,976.4881	10,963.3317	11,002.0533	10,907.9371	10,853.8764	10,863.0718	10,779.9092		10,691.2092	10,694.7863	10,612.897	10,575.59	10,544.2651	10,786.7199	10,858.7671	10,856.1803	10,844.4789	10,755.8396	10,569.7697	10,561.5241	10,490.0427	10,363.0455	10,289.9473	10,177.6021	10,228.692	10,266.1404	10,233.421	10,193.5273	10,223.6598	10,164.4658	10,279.1756	10,297.2026	10,309.1667	10,266.7871	10,326.9713	10,134.0706	10,152.4007	10,097.9156	10,000
Thornburg Strategic Income Funds Blended Index 1336 [Member]
Account Value [Line Items]
Account Value	14,243.8138	14,041.9705	13,810.2039	13,510.1462	13,354.6483	13,060.87	13,432.0791	13,249.0534	13,286.5653	13,283.8655	12,767.5212	12,102.1509		12,329.3555	12,697.0243	12,823.8162	12,745.2937	12,628.574		12,765.2599	12,659.4992	12,332.6595	12,655.2662	12,183.0234	12,332.2684	11,820.1424	11,773.0422	12,433.995	12,831.3419	12,392.3213	12,773.942	12,706.4755	13,332.7546	13,559.6996	13,752.0001		14,145.4901	14,054.1256	14,082.5127	13,927.8078	14,143.214	14,094.5228	13,920.1403	13,801.4253	13,726.0044	13,514.7933	13,560.0148	13,647.7392	13,753.9673	13,623.4342	13,182.8319	13,312.0547	13,410.469	13,318.4978	13,037.9479	12,904.6506	12,734.1838	12,290.8562	12,686.372	12,718.2487	12,540.447	12,472.666	12,408.6071	12,316.245	12,316.2999	12,114.7278	12,081.5035	11,807.2714	11,775.9355	11,690.6344		11,484.0545	11,420.6629	11,152.3723	11,158.0714	11,079.9828	11,317.7408	11,363.6265	11,277.6641	11,205.5381	11,217.6448	11,140.0801	11,180.908	11,172.294	11,352.4461	11,337.1814	11,265.3495	11,228.2216	11,180.7795	11,173.1962	11,090.4925	10,999.9736	11,000.3642	10,887.2607		10,788.7073	10,770.279	10,653.881	10,586.1638	10,523.9235	10,695.5582	10,803.4833	10,797.0727	10,805.1599	10,661.1569	10,533.354	10,519.3782	10,454.1897	10,240.0546	10,197.36	10,207.116	10,269.7724	10,301.7941	10,139.7461	10,159.713	10,307.9799	10,214.5069	10,352.9634	10,365.7936	10,346.9614	10,340.9202	10,297.7135	10,164.0428	10,189.2764	10,091.5595	10,000
Bloomberg U S Aggregate Total Return Value Index 1337 [Member]
Account Value [Line Items]
Account Value	12,004.424	11,845.8158	11,678.0004	11,411.4668	11,304.4398	11,115.9877	11,404.0404	11,299.6979	11,461.6339	11,493.195	11,069.4673	10,589.8898		10,759.6881	11,040.24	11,111.2139	11,118.9646	11,158.7602		11,281.6023	11,213.6426	10,935.8444	11,226.0979	10,891.0465	10,940.3949	10,552.327	10,690.7981	11,173.5652	11,498.4738	11,224.2161	11,403.1101	11,330.0576	11,776.9683	12,113.503	12,250.172		12,519.9004	12,552.0197	12,514.9938	12,518.4439	12,627.7727	12,651.8595	12,511.9637	12,424.6696	12,384.2096	12,287.1394	12,442.5048	12,624.817	12,715.9864	12,698.4914	12,575.0965	12,631.4992	12,638.4313	12,741.2746	12,553.758	12,475.1769	12,417.3601	12,200.4833	12,272.7065	12,055.7234	11,828.0976	11,836.3427	11,842.3764	11,806.8123	11,870.0302	11,570.2238	11,544.8346	11,401.6482	11,202.782	11,199.9166		10,988.9087	10,995.2773	10,879.7393	10,683.4727	10,620.0741	10,704.6676	10,774.0467	10,705.1619	10,702.6209	10,715.7993	10,639.8655	10,719.5896	10,651.2843	10,753.2186	10,878.506	10,828.8068	10,842.724	10,836.4459	10,888.3034	10,791.5097	10,745.2712	10,756.0945	10,673.9358		10,592.197	10,597.7522	10,527.0016	10,506.3861	10,491.5864	10,745.7655	10,828.5941	10,834.9414	10,847.3436	10,779.1979	10,588.9383	10,586.2218	10,545.7404	10,449.8664	10,376.2558	10,235.4031	10,268.5908	10,295.7875	10,294.0811	10,224.9146	10,239.6187	10,168.9318	10,281.0356	10,305.856	10,342.967	10,295.1602	10,392.8789	10,179.4256	10,169.91	10,098.2769	10,000
Bloomberg U S Universal Total Return Index 1365 [Member]
Account Value [Line Items]
Account Value	12,372.5481	12,205.1518	12,028.0752	11,761.1264	11,654.5813	11,464.5503	11,738.8554	11,624.7317	11,765.7948	11,794.0277	11,362.8555	10,873.4999		11,039.5219	11,309.1788	11,377.7096	11,366.4124	11,384.0958		11,503.3528	11,433.5083	11,171.4301	11,452.8489	11,108.275	11,146.1276	10,745.472	10,864.6885	11,353.842	11,656.8852	11,371	11,602.8447	11,539.3461	11,986.4232	12,316.8706	12,487.1164		12,767.0195	12,775.6288	12,760.2291	12,770.6573	12,880.6582	12,889.2473	12,761.1183	12,668.7604	12,620.6211	12,515.3896	12,662.7379	12,828.2749	12,909.4165	12,864.9755	12,699.2567	12,744.8092	12,767.8279	12,841.8759	12,620.1967	12,515.7534	12,399.9523	12,156.4467	12,398.6185	12,215.7215	12,000.3476	11,982.4823	11,984.8873	11,946.2869	11,998.266	11,732.7723	11,697.9511	11,534.8191	11,360.7739	11,344.9094		11,143.6621	11,131.5363	10,980.1461	10,810.9916	10,762.5896	10,853.3914	10,900.0958	10,846.6616	10,824.0066	10,839.7297	10,780.9399	10,853.351	10,798.886	10,902.2582	11,008.197	10,959.8758	10,976.4881	10,963.3317	11,002.0533	10,907.9371	10,853.8764	10,863.0718	10,779.9092		10,691.2092	10,694.7863	10,612.897	10,575.59	10,544.2651	10,786.7199	10,858.7671	10,856.1803	10,844.4789	10,755.8396	10,569.7697	10,561.5241	10,490.0427	10,363.0455	10,289.9473	10,177.6021	10,228.692	10,266.1404	10,233.421	10,193.5273	10,223.6598	10,164.4658	10,279.1756	10,297.2026	10,309.1667	10,266.7871	10,326.9713	10,134.0706	10,152.4007	10,097.9156	10,000
Thornburg Strategic Income Funds Blended Index 1366 [Member]
Account Value [Line Items]
Account Value	14,243.8138	14,041.9705	13,810.2039	13,510.1462	13,354.6483	13,060.87	13,432.0791	13,249.0534	13,286.5653	13,283.8655	12,767.5212	12,102.1509		12,329.3555	12,697.0243	12,823.8162	12,745.2937	12,628.574		12,765.2599	12,659.4992	12,332.6595	12,655.2662	12,183.0234	12,332.2684	11,820.1424	11,773.0422	12,433.995	12,831.3419	12,392.3213	12,773.942	12,706.4755	13,332.7546	13,559.6996	13,752.0001		14,145.4901	14,054.1256	14,082.5127	13,927.8078	14,143.214	14,094.5228	13,920.1403	13,801.4253	13,726.0044	13,514.7933	13,560.0148	13,647.7392	13,753.9673	13,623.4342	13,182.8319	13,312.0547	13,410.469	13,318.4978	13,037.9479	12,904.6506	12,734.1838	12,290.8562	12,686.372	12,718.2487	12,540.447	12,472.666	12,408.6071	12,316.245	12,316.2999	12,114.7278	12,081.5035	11,807.2714	11,775.9355	11,690.6344		11,484.0545	11,420.6629	11,152.3723	11,158.0714	11,079.9828	11,317.7408	11,363.6265	11,277.6641	11,205.5381	11,217.6448	11,140.0801	11,180.908	11,172.294	11,352.4461	11,337.1814	11,265.3495	11,228.2216	11,180.7795	11,173.1962	11,090.4925	10,999.9736	11,000.3642	10,887.2607		10,788.7073	10,770.279	10,653.881	10,586.1638	10,523.9235	10,695.5582	10,803.4833	10,797.0727	10,805.1599	10,661.1569	10,533.354	10,519.3782	10,454.1897	10,240.0546	10,197.36	10,207.116	10,269.7724	10,301.7941	10,139.7461	10,159.713	10,307.9799	10,214.5069	10,352.9634	10,365.7936	10,346.9614	10,340.9202	10,297.7135	10,164.0428	10,189.2764	10,091.5595	10,000
Bloomberg U S Aggregate Total Return Value Index 1367 [Member]
Account Value [Line Items]
Account Value	12,004.424	11,845.8158	11,678.0004	11,411.4668	11,304.4398	11,115.9877	11,404.0404	11,299.6979	11,461.6339	11,493.195	11,069.4673	10,589.8898		10,759.6881	11,040.24	11,111.2139	11,118.9646	11,158.7602		11,281.6023	11,213.6426	10,935.8444	11,226.0979	10,891.0465	10,940.3949	10,552.327	10,690.7981	11,173.5652	11,498.4738	11,224.2161	11,403.1101	11,330.0576	11,776.9683	12,113.503	12,250.172		12,519.9004	12,552.0197	12,514.9938	12,518.4439	12,627.7727	12,651.8595	12,511.9637	12,424.6696	12,384.2096	12,287.1394	12,442.5048	12,624.817	12,715.9864	12,698.4914	12,575.0965	12,631.4992	12,638.4313	12,741.2746	12,553.758	12,475.1769	12,417.3601	12,200.4833	12,272.7065	12,055.7234	11,828.0976	11,836.3427	11,842.3764	11,806.8123	11,870.0302	11,570.2238	11,544.8346	11,401.6482	11,202.782	11,199.9166		10,988.9087	10,995.2773	10,879.7393	10,683.4727	10,620.0741	10,704.6676	10,774.0467	10,705.1619	10,702.6209	10,715.7993	10,639.8655	10,719.5896	10,651.2843	10,753.2186	10,878.506	10,828.8068	10,842.724	10,836.4459	10,888.3034	10,791.5097	10,745.2712	10,756.0945	10,673.9358		10,592.197	10,597.7522	10,527.0016	10,506.3861	10,491.5864	10,745.7655	10,828.5941	10,834.9414	10,847.3436	10,779.1979	10,588.9383	10,586.2218	10,545.7404	10,449.8664	10,376.2558	10,235.4031	10,268.5908	10,295.7875	10,294.0811	10,224.9146	10,239.6187	10,168.9318	10,281.0356	10,305.856	10,342.967	10,295.1602	10,392.8789	10,179.4256	10,169.91	10,098.2769	10,000
Bloomberg U S Universal Total Return Index 1395 [Member]
Account Value [Line Items]
Account Value	11,542.4832	11,386.3174	11,221.1207	10,972.0813	10,872.6843	10,695.4023	10,951.3045	10,844.8373	10,976.4366	11,002.7753	10,600.5302	10,144.0051		10,298.8888	10,550.4546	10,614.3877	10,603.8484	10,620.3455		10,731.6016	10,666.4429	10,421.9473	10,684.486	10,363.0293	10,398.3424	10,024.5665	10,135.7848	10,592.1214	10,874.8336	10,608.1282	10,824.4186	10,765.1801	11,182.2631	11,490.5411	11,649.3652		11,910.4899	11,918.5216	11,904.155	11,913.8835	12,016.5046	12,024.5174	11,904.9846	11,818.8228	11,773.9132	11,675.7416	11,813.2044	11,967.6356	12,043.3335	12,001.8741	11,847.2732	11,889.7696	11,911.244	11,980.3242	11,773.5172	11,676.081	11,568.0489	11,340.8799	11,566.8046	11,396.178	11,195.2534	11,178.5866	11,180.8302	11,144.8196	11,193.3114	10,945.6295	10,913.1445	10,760.9569	10,598.5882	10,583.788		10,396.0422	10,384.73	10,243.4964	10,085.6904	10,040.5356	10,125.2456	10,168.8166	10,118.9673	10,097.8322	10,112.5004	10,057.6548	10,125.2079	10,074.397	10,170.834	10,269.6654	10,224.5861	10,240.0839	10,227.8101	10,263.9339	10,176.1319	10,125.6981	10,134.2765	10,056.6933	10,000
Thornburg Strategic Income Funds Blended Index 1396 [Member]
Account Value [Line Items]
Account Value	13,185.2227	12,998.3802	12,783.8383	12,506.0807	12,362.1394	12,090.1944	12,433.8155	12,264.3922	12,299.1162	12,296.6171	11,818.6472	11,202.7268		11,413.0457	11,753.3896	11,870.7584	11,798.0716	11,690.0264		11,816.5539	11,718.6533	11,416.1041	11,714.7349	11,277.5889	11,415.7421	10,941.677	10,898.0772	11,509.9084	11,877.7248	11,471.3319	11,824.5908	11,762.1383	12,341.8727	12,551.9514	12,729.9602		13,094.2063	13,009.6319	13,035.9093	12,892.702	13,092.0993	13,047.0269	12,885.6044	12,775.7122	12,705.8965	12,510.3825	12,552.2432	12,633.4479	12,731.7813	12,610.9493	12,203.0922	12,322.7113	12,413.8115	12,328.6755	12,068.9759	11,945.5852	11,787.7874	11,377.4076	11,743.5289	11,773.0366	11,608.449	11,545.7054	11,486.4073	11,400.9095	11,400.9604	11,214.3689	11,183.6138	10,929.7626	10,900.7554	10,821.7939		10,630.5669	10,571.8865	10,323.5351	10,328.8107	10,256.5255	10,476.6135	10,519.089	10,439.5153	10,372.7496	10,383.9566	10,312.1564	10,349.95	10,341.9763	10,508.7396	10,494.6093	10,428.1159	10,393.7473	10,349.8311	10,342.8114	10,266.2542	10,182.4626	10,182.8242	10,078.1265	10,000
Bloomberg U S Aggregate Total Return Value Index 1397 [Member]
Account Value [Line Items]
Account Value	11,305.8365	11,156.4585	10,998.4089	10,747.386	10,646.5874	10,469.102	10,740.3918	10,642.1215	10,794.6337	10,824.3581	10,425.2889	9,973.62		10,133.5371	10,397.7624	10,464.6061	10,471.9057	10,509.3854		10,625.0789	10,561.074	10,299.4421	10,572.8045	10,257.2511	10,303.7277	9,938.2431	10,068.656	10,523.3289	10,829.3297	10,571.0322	10,739.5156	10,670.7144	11,091.6175	11,408.5678	11,537.2834		11,791.3153	11,821.5654	11,786.6942	11,789.9435	11,892.91	11,915.5951	11,783.8404	11,701.6264	11,663.5208	11,572.0996	11,718.4236	11,890.1263	11,975.9902	11,959.5133	11,843.2992	11,896.4197	11,902.9483	11,999.8067	11,823.2026	11,749.1944	11,694.7422	11,490.4864	11,558.5066	11,354.1506	11,139.7713	11,147.5366	11,153.2192	11,119.7248	11,179.2637	10,896.9043	10,872.9926	10,738.1388	10,550.8454	10,548.1468		10,349.4183	10,355.4163	10,246.602	10,061.7569	10,002.0477	10,081.7184	10,147.06	10,082.184	10,079.7908	10,092.2023	10,020.6874	10,095.772	10,031.4417	10,127.444	10,245.4405	10,198.6334	10,211.7408	10,205.8279	10,254.6677	10,163.5068	10,119.9591	10,130.1526	10,052.775	$ 10,000
I C E Bof A 13 Year U S Municipal Securities Index 1425 [Member]
Account Value [Line Items]
Account Value	11,391.2647	11,342.7513	11,254.6314	11,171.695	11,096.972	11,081.1294	11,097.7021	11,103.0681	11,091.6425	11,092.1535	11,004.8367	10,815.9302		10,796.4737	10,859.5156	10,858.6395	10,840.1321	10,787.5303		10,814.4336	10,851.8498	10,723.1014	10,839.4386	10,732.8478	10,727.2628	10,571.8301	10,566.026	10,692.5478	10,805.1981	10,721.4952	10,722.8093	10,628.9219	10,699.666	10,818.4855	10,843.235		10,955.0822	10,956.1043	10,951.8334	10,955.8853	10,971.2169	10,976.0718	10,957.4915	10,959.0246	10,953.0745	10,938.8016	10,926.6824	10,939.4587	10,918.177	10,904.5611	10,885.4697	10,897.2239	10,888.463	10,887.2584	10,846.6298	10,835.8612	10,702.8053	10,675.5371	10,766.1392	10,738.0314	10,687.8023	10,668.9299	10,651.0066	10,620.526	10,647.6483	10,630.455	10,585.227	10,549.3073	10,498.6037	10,495.5739		10,458.7052	10,431.0719	10,389.0562	10,341.9665	10,297.724	10,298.7096	10,327.292	10,325.9413	10,299.9142	10,262.2789	10,222.3439	10,239.3911	10,246.5093	10,233.9886	10,209.8596	10,195.9882	10,259.7237	10,269.3971	10,285.6778	10,256.3653	10,226.0673	10,239.3911	10,215.1162		10,192.5204	10,197.9959	10,155.4692	10,110.0221	10,094.9096	10,158.2434	10,157.2943	10,189.7826	10,196.0613	10,175.7652	10,140.1376	10,146.3432	10,127.8359	10,147.4749	10,123.5649	10,076.9132	10,078.7749	10,099.0345	10,085.2361	10,065.1226	10,050.9591	10,028.3269	10,020.1135	10,028.0348	10,026.9762	10,032.8168	10,031.4662	10,001.1681	10,011.4622	10,005.9501	10,000
I C E Bof A U S Municipal Securities Index 1426 [Member]
Account Value [Line Items]
Account Value	12,899.3409	12,763.903	12,664.2203	12,555.7339	12,356.9688	12,382.8399	12,522.8598	12,535.4652	12,533.8245	12,561.5363	12,262.5884	11,525.4929		11,671.6555	12,012.0412	12,159.4442	12,128.6911	12,018.8841		12,111.7038	12,125.9499	11,859.776	12,154.9223	11,792.3671	11,804.6324	11,235.8489	11,336.1319	11,774.1193	12,081.5509	11,760.3534	11,990.3119	11,801.7111	12,161.105	12,543.3886	12,614.479		12,962.708	12,944.6803	12,840.0155	12,854.4017	12,952.2436	13,000.3241	12,903.5827	12,861.4247	12,805.5408	12,685.0892	12,608.4364	12,814.1645	12,730.2285	12,644.4318	12,453.9903	12,478.7409	12,486.8844	12,529.0824	12,331.8981	12,213.0072	11,828.8427	12,011.9411	12,480.4216	12,310.4889	12,094.0362	12,055.2997	12,032.5099	12,018.0237	12,108.5024	11,920.3619	11,826.3817	11,776.3203	11,604.8669	11,556.5862		11,374.1081	11,309.9006	11,225.6846	11,094.9286	10,973.8968	11,053.4109	11,124.0611	11,107.1138	11,080.8826	11,068.6574	10,940.1224	10,982.8206	10,946.205	10,993.045	11,110.0751	11,000.3481	11,047.8085	11,027.4598	11,069.4177	10,976.8981	10,897.224	10,922.1347	10,762.9465		10,685.8535	10,661.5031	10,592.9738	10,539.3308	10,425.262	10,819.6708	10,921.9146	10,974.9373	10,949.7465	10,955.589	10,780.454	10,746.9397	10,665.2047	10,618.4247	10,609.5409	10,493.2511	10,410.5357	10,359.774	10,315.6951	10,246.5455	10,223.9759	10,143.7215	10,157.4674	10,191.582	10,243.2441	10,213.0312	10,315.1349	10,133.237	10,074.732	10,061.0061	10,000
I C E Bof A 13 Year U S Municipal Securities Index 1447 [Member]
Account Value [Line Items]
Account Value	11,391.2647	11,342.7513	11,254.6314	11,171.695	11,096.972	11,081.1294	11,097.7021	11,103.0681	11,091.6425	11,092.1535	11,004.8367	10,815.9302		10,796.4737	10,859.5156	10,858.6395	10,840.1321	10,787.5303		10,814.4336	10,851.8498	10,723.1014	10,839.4386	10,732.8478	10,727.2628	10,571.8301	10,566.026	10,692.5478	10,805.1981	10,721.4952	10,722.8093	10,628.9219	10,699.666	10,818.4855	10,843.235		10,955.0822	10,956.1043	10,951.8334	10,955.8853	10,971.2169	10,976.0718	10,957.4915	10,959.0246	10,953.0745	10,938.8016	10,926.6824	10,939.4587	10,918.177	10,904.5611	10,885.4697	10,897.2239	10,888.463	10,887.2584	10,846.6298	10,835.8612	10,702.8053	10,675.5371	10,766.1392	10,738.0314	10,687.8023	10,668.9299	10,651.0066	10,620.526	10,647.6483	10,630.455	10,585.227	10,549.3073	10,498.6037	10,495.5739		10,458.7052	10,431.0719	10,389.0562	10,341.9665	10,297.724	10,298.7096	10,327.292	10,325.9413	10,299.9142	10,262.2789	10,222.3439	10,239.3911	10,246.5093	10,233.9886	10,209.8596	10,195.9882	10,259.7237	10,269.3971	10,285.6778	10,256.3653	10,226.0673	10,239.3911	10,215.1162		10,192.5204	10,197.9959	10,155.4692	10,110.0221	10,094.9096	10,158.2434	10,157.2943	10,189.7826	10,196.0613	10,175.7652	10,140.1376	10,146.3432	10,127.8359	10,147.4749	10,123.5649	10,076.9132	10,078.7749	10,099.0345	10,085.2361	10,065.1226	10,050.9591	10,028.3269	10,020.1135	10,028.0348	10,026.9762	10,032.8168	10,031.4662	10,001.1681	10,011.4622	10,005.9501	10,000
I C E Bof A U S Municipal Securities Index 1448 [Member]
Account Value [Line Items]
Account Value	12,899.3409	12,763.903	12,664.2203	12,555.7339	12,356.9688	12,382.8399	12,522.8598	12,535.4652	12,533.8245	12,561.5363	12,262.5884	11,525.4929		11,671.6555	12,012.0412	12,159.4442	12,128.6911	12,018.8841		12,111.7038	12,125.9499	11,859.776	12,154.9223	11,792.3671	11,804.6324	11,235.8489	11,336.1319	11,774.1193	12,081.5509	11,760.3534	11,990.3119	11,801.7111	12,161.105	12,543.3886	12,614.479		12,962.708	12,944.6803	12,840.0155	12,854.4017	12,952.2436	13,000.3241	12,903.5827	12,861.4247	12,805.5408	12,685.0892	12,608.4364	12,814.1645	12,730.2285	12,644.4318	12,453.9903	12,478.7409	12,486.8844	12,529.0824	12,331.8981	12,213.0072	11,828.8427	12,011.9411	12,480.4216	12,310.4889	12,094.0362	12,055.2997	12,032.5099	12,018.0237	12,108.5024	11,920.3619	11,826.3817	11,776.3203	11,604.8669	11,556.5862		11,374.1081	11,309.9006	11,225.6846	11,094.9286	10,973.8968	11,053.4109	11,124.0611	11,107.1138	11,080.8826	11,068.6574	10,940.1224	10,982.8206	10,946.205	10,993.045	11,110.0751	11,000.3481	11,047.8085	11,027.4598	11,069.4177	10,976.8981	10,897.224	10,922.1347	10,762.9465		10,685.8535	10,661.5031	10,592.9738	10,539.3308	10,425.262	10,819.6708	10,921.9146	10,974.9373	10,949.7465	10,955.589	10,780.454	10,746.9397	10,665.2047	10,618.4247	10,609.5409	10,493.2511	10,410.5357	10,359.774	10,315.6951	10,246.5455	10,223.9759	10,143.7215	10,157.4674	10,191.582	10,243.2441	10,213.0312	10,315.1349	10,133.237	10,074.732	10,061.0061	10,000
I C E Bof A 110 Year U S Municipal Securities Index 1468 [Member]
Account Value [Line Items]
Account Value	11,981.8917	11,895.1358	11,771.5932	11,666.8448	11,540.6301	11,593.6278	11,680.3837	11,690.627	11,680.6955	11,703.5424	11,522.2813	11,126.4908		11,153.6577	11,332.8702	11,388.0947	11,365.8713	11,297.3305		11,387.1594	11,425.1485	11,232.0409	11,436.9951	11,222.5102	11,188.4403	10,893.5681	10,912.5404	11,175.5694	11,355.0045	11,159.1802	11,210.4855	11,063.3835	11,243.0413	11,477.4782	11,516.7143		11,765.1355	11,758.8114	11,724.6079	11,744.9162	11,802.1003	11,818.8903	11,755.8721	11,746.5195	11,734.3612	11,679.6266	11,644.3096	11,755.4267	11,708.3968	11,664.3953	11,585.9676	11,606.3651	11,604.8954	11,617.7663	11,498.7218	11,448.9307	11,168.7109	11,208.2587	11,478.9924	11,411.0752	11,278.67	11,243.7093	11,224.8261	11,192.2704	11,268.4267	11,194.319	11,111.3932	11,066.0111	10,949.2825	10,937.3469		10,853.9757	10,805.1198	10,713.0196	10,616.4213	10,524.6328	10,553.8929	10,601.3236	10,595.7566	10,554.65	10,529.888	10,443.1321	10,475.3761	10,474.2182	10,494.8828	10,535.2323	10,488.0688	10,581.0598	10,584.3109	10,635.349	10,573.934	10,509.8914	10,545.3865	10,452.3956		10,387.2396	10,379.8912	10,316.8283	10,245.66	10,188.5204	10,435.7837	10,481.3439	10,512.5636	10,509.4015	10,485.9311	10,394.6771	10,412.4469	10,364.6599	10,380.4701	10,357.5787	10,250.3808	10,219.8737	10,221.0316	10,181.2611	10,123.0972	10,113.7892	10,061.5931	10,054.6901	10,091.7885	10,101.9427	10,102.8334	10,163.3576	10,037.6328	10,036.9203	10,031.0861	10,000
I C E Bof A U S Municipal Securities Index 1469 [Member]
Account Value [Line Items]
Account Value	12,899.3409	12,763.903	12,664.2203	12,555.7339	12,356.9688	12,382.8399	12,522.8598	12,535.4652	12,533.8245	12,561.5363	12,262.5884	11,525.4929		11,671.6555	12,012.0412	12,159.4442	12,128.6911	12,018.8841		12,111.7038	12,125.9499	11,859.776	12,154.9223	11,792.3671	11,804.6324	11,235.8489	11,336.1319	11,774.1193	12,081.5509	11,760.3534	11,990.3119	11,801.7111	12,161.105	12,543.3886	12,614.479		12,962.708	12,944.6803	12,840.0155	12,854.4017	12,952.2436	13,000.3241	12,903.5827	12,861.4247	12,805.5408	12,685.0892	12,608.4364	12,814.1645	12,730.2285	12,644.4318	12,453.9903	12,478.7409	12,486.8844	12,529.0824	12,331.8981	12,213.0072	11,828.8427	12,011.9411	12,480.4216	12,310.4889	12,094.0362	12,055.2997	12,032.5099	12,018.0237	12,108.5024	11,920.3619	11,826.3817	11,776.3203	11,604.8669	11,556.5862		11,374.1081	11,309.9006	11,225.6846	11,094.9286	10,973.8968	11,053.4109	11,124.0611	11,107.1138	11,080.8826	11,068.6574	10,940.1224	10,982.8206	10,946.205	10,993.045	11,110.0751	11,000.3481	11,047.8085	11,027.4598	11,069.4177	10,976.8981	10,897.224	10,922.1347	10,762.9465		10,685.8535	10,661.5031	10,592.9738	10,539.3308	10,425.262	10,819.6708	10,921.9146	10,974.9373	10,949.7465	10,955.589	10,780.454	10,746.9397	10,665.2047	10,618.4247	10,609.5409	10,493.2511	10,410.5357	10,359.774	10,315.6951	10,246.5455	10,223.9759	10,143.7215	10,157.4674	10,191.582	10,243.2441	10,213.0312	10,315.1349	10,133.237	10,074.732	10,061.0061	10,000
I C E Bof A 110 Year U S Municipal Securities Index 1490 [Member]
Account Value [Line Items]
Account Value	11,981.8917	11,895.1358	11,771.5932	11,666.8448	11,540.6301	11,593.6278	11,680.3837	11,690.627	11,680.6955	11,703.5424	11,522.2813	11,126.4908		11,153.6577	11,332.8702	11,388.0947	11,365.8713	11,297.3305		11,387.1594	11,425.1485	11,232.0409	11,436.9951	11,222.5102	11,188.4403	10,893.5681	10,912.5404	11,175.5694	11,355.0045	11,159.1802	11,210.4855	11,063.3835	11,243.0413	11,477.4782	11,516.7143		11,765.1355	11,758.8114	11,724.6079	11,744.9162	11,802.1003	11,818.8903	11,755.8721	11,746.5195	11,734.3612	11,679.6266	11,644.3096	11,755.4267	11,708.3968	11,664.3953	11,585.9676	11,606.3651	11,604.8954	11,617.7663	11,498.7218	11,448.9307	11,168.7109	11,208.2587	11,478.9924	11,411.0752	11,278.67	11,243.7093	11,224.8261	11,192.2704	11,268.4267	11,194.319	11,111.3932	11,066.0111	10,949.2825	10,937.3469		10,853.9757	10,805.1198	10,713.0196	10,616.4213	10,524.6328	10,553.8929	10,601.3236	10,595.7566	10,554.65	10,529.888	10,443.1321	10,475.3761	10,474.2182	10,494.8828	10,535.2323	10,488.0688	10,581.0598	10,584.3109	10,635.349	10,573.934	10,509.8914	10,545.3865	10,452.3956		10,387.2396	10,379.8912	10,316.8283	10,245.66	10,188.5204	10,435.7837	10,481.3439	10,512.5636	10,509.4015	10,485.9311	10,394.6771	10,412.4469	10,364.6599	10,380.4701	10,357.5787	10,250.3808	10,219.8737	10,221.0316	10,181.2611	10,123.0972	10,113.7892	10,061.5931	10,054.6901	10,091.7885	10,101.9427	10,102.8334	10,163.3576	10,037.6328	10,036.9203	10,031.0861	10,000
I C E Bof A U S Municipal Securities Index 1491 [Member]
Account Value [Line Items]
Account Value	12,899.3409	12,763.903	12,664.2203	12,555.7339	12,356.9688	12,382.8399	12,522.8598	12,535.4652	12,533.8245	12,561.5363	12,262.5884	11,525.4929		11,671.6555	12,012.0412	12,159.4442	12,128.6911	12,018.8841		12,111.7038	12,125.9499	11,859.776	12,154.9223	11,792.3671	11,804.6324	11,235.8489	11,336.1319	11,774.1193	12,081.5509	11,760.3534	11,990.3119	11,801.7111	12,161.105	12,543.3886	12,614.479		12,962.708	12,944.6803	12,840.0155	12,854.4017	12,952.2436	13,000.3241	12,903.5827	12,861.4247	12,805.5408	12,685.0892	12,608.4364	12,814.1645	12,730.2285	12,644.4318	12,453.9903	12,478.7409	12,486.8844	12,529.0824	12,331.8981	12,213.0072	11,828.8427	12,011.9411	12,480.4216	12,310.4889	12,094.0362	12,055.2997	12,032.5099	12,018.0237	12,108.5024	11,920.3619	11,826.3817	11,776.3203	11,604.8669	11,556.5862		11,374.1081	11,309.9006	11,225.6846	11,094.9286	10,973.8968	11,053.4109	11,124.0611	11,107.1138	11,080.8826	11,068.6574	10,940.1224	10,982.8206	10,946.205	10,993.045	11,110.0751	11,000.3481	11,047.8085	11,027.4598	11,069.4177	10,976.8981	10,897.224	10,922.1347	10,762.9465		10,685.8535	10,661.5031	10,592.9738	10,539.3308	10,425.262	10,819.6708	10,921.9146	10,974.9373	10,949.7465	10,955.589	10,780.454	10,746.9397	10,665.2047	10,618.4247	10,609.5409	10,493.2511	10,410.5357	10,359.774	10,315.6951	10,246.5455	10,223.9759	10,143.7215	10,157.4674	10,191.582	10,243.2441	10,213.0312	10,315.1349	10,133.237	10,074.732	10,061.0061	10,000
I C E Bof A 110 Year U S Municipal Securities Index 1512 [Member]
Account Value [Line Items]
Account Value	10,323.5523	10,248.8038	10,142.36	10,052.1091	9,943.363	9,989.0256	10,063.7742	10,072.5997	10,064.0428	10,083.7276	9,927.5537	9,586.5422		9,609.9491	9,764.3578	9,811.9391	9,792.7914	9,733.737		9,811.1332	9,843.8645	9,677.4837	9,854.0715	9,669.2721	9,639.9176	9,385.8569	9,402.2033	9,628.8281	9,783.4287	9,614.7072	9,658.9117	9,532.1691	9,686.9616	9,888.9516	9,922.7573		10,136.796	10,131.3472	10,101.8775	10,119.3752	10,168.6447	10,183.111	10,128.8147	10,120.7565	10,110.281	10,063.1219	10,032.6929	10,128.4309	10,087.9101	10,049.9987	9,982.4256	10,000
I C E Bof A U S Municipal Securities Index 1513 [Member]
Account Value [Line Items]
Account Value	10,337.0532	10,228.5183	10,148.6363	10,061.6993	9,902.4163	9,923.1485	10,035.3552	10,045.4567	10,044.1419	10,066.3492	9,826.7834	9,236.1024		9,353.2317	9,626.0041	9,744.1275	9,719.4831	9,631.4878		9,705.8701	9,717.2864	9,503.9845	9,740.5038	9,449.9655	9,459.7944	9,003.9925	9,084.3555	9,435.3424	9,681.7067	9,424.3109	9,608.5911	9,457.4535	9,745.4583	10,051.8062	10,108.7755		10,387.8333	10,373.3866	10,289.5121	10,301.0406	10,379.4475	10,417.9775	10,340.4525	10,306.6686	10,261.8853	10,165.3599	10,103.9332	10,268.796	10,201.5329	10,132.7786	9,980.1658	10,000
I C E Bof A 110 Year U S Municipal Securities Index 1534 [Member]
Account Value [Line Items]
Account Value	11,981.8917	11,895.1358	11,771.5932	11,666.8448	11,540.6301	11,593.6278	11,680.3837	11,690.627	11,680.6955	11,703.5424	11,522.2813	11,126.4908		11,153.6577	11,332.8702	11,388.0947	11,365.8713	11,297.3305		11,387.1594	11,425.1485	11,232.0409	11,436.9951	11,222.5102	11,188.4403	10,893.5681	10,912.5404	11,175.5694	11,355.0045	11,159.1802	11,210.4855	11,063.3835	11,243.0413	11,477.4782	11,516.7143		11,765.1355	11,758.8114	11,724.6079	11,744.9162	11,802.1003	11,818.8903	11,755.8721	11,746.5195	11,734.3612	11,679.6266	11,644.3096	11,755.4267	11,708.3968	11,664.3953	11,585.9676	11,606.3651	11,604.8954	11,617.7663	11,498.7218	11,448.9307	11,168.7109	11,208.2587	11,478.9924	11,411.0752	11,278.67	11,243.7093	11,224.8261	11,192.2704	11,268.4267	11,194.319	11,111.3932	11,066.0111	10,949.2825	10,937.3469		10,853.9757	10,805.1198	10,713.0196	10,616.4213	10,524.6328	10,553.8929	10,601.3236	10,595.7566	10,554.65	10,529.888	10,443.1321	10,475.3761	10,474.2182	10,494.8828	10,535.2323	10,488.0688	10,581.0598	10,584.3109	10,635.349	10,573.934	10,509.8914	10,545.3865	10,452.3956		10,387.2396	10,379.8912	10,316.8283	10,245.66	10,188.5204	10,435.7837	10,481.3439	10,512.5636	10,509.4015	10,485.9311	10,394.6771	10,412.4469	10,364.6599	10,380.4701	10,357.5787	10,250.3808	10,219.8737	10,221.0316	10,181.2611	10,123.0972	10,113.7892	10,061.5931	10,054.6901	10,091.7885	10,101.9427	10,102.8334	10,163.3576	10,037.6328	10,036.9203	10,031.0861	10,000
I C E Bof A U S Municipal Securities Index 1535 [Member]
Account Value [Line Items]
Account Value	12,899.3409	12,763.903	12,664.2203	12,555.7339	12,356.9688	12,382.8399	12,522.8598	12,535.4652	12,533.8245	12,561.5363	12,262.5884	11,525.4929		11,671.6555	12,012.0412	12,159.4442	12,128.6911	12,018.8841		12,111.7038	12,125.9499	11,859.776	12,154.9223	11,792.3671	11,804.6324	11,235.8489	11,336.1319	11,774.1193	12,081.5509	11,760.3534	11,990.3119	11,801.7111	12,161.105	12,543.3886	12,614.479		12,962.708	12,944.6803	12,840.0155	12,854.4017	12,952.2436	13,000.3241	12,903.5827	12,861.4247	12,805.5408	12,685.0892	12,608.4364	12,814.1645	12,730.2285	12,644.4318	12,453.9903	12,478.7409	12,486.8844	12,529.0824	12,331.8981	12,213.0072	11,828.8427	12,011.9411	12,480.4216	12,310.4889	12,094.0362	12,055.2997	12,032.5099	12,018.0237	12,108.5024	11,920.3619	11,826.3817	11,776.3203	11,604.8669	11,556.5862		11,374.1081	11,309.9006	11,225.6846	11,094.9286	10,973.8968	11,053.4109	11,124.0611	11,107.1138	11,080.8826	11,068.6574	10,940.1224	10,982.8206	10,946.205	10,993.045	11,110.0751	11,000.3481	11,047.8085	11,027.4598	11,069.4177	10,976.8981	10,897.224	10,922.1347	10,762.9465		10,685.8535	10,661.5031	10,592.9738	10,539.3308	10,425.262	10,819.6708	10,921.9146	10,974.9373	10,949.7465	10,955.589	10,780.454	10,746.9397	10,665.2047	10,618.4247	10,609.5409	10,493.2511	10,410.5357	10,359.774	10,315.6951	10,246.5455	10,223.9759	10,143.7215	10,157.4674	10,191.582	10,243.2441	10,213.0312	10,315.1349	10,133.237	10,074.732	10,061.0061	10,000
I C E Bof A 315 Year U S Municipal Securities Index 1555 [Member]
Account Value [Line Items]
Account Value	12,575.0392	12,462.583	12,337.7359	12,227.9768	12,061.032	12,144.3676	12,276.5241	12,288.2896	12,277.4232	12,314.205	12,052.0418	11,480.6925		11,557.1486	11,829.2011	11,933.0188	11,902.6474	11,817.0447		11,938.2566	11,967.0254	11,726.2824	11,983.4423	11,681.9957	11,634.8946	11,202.2296	11,242.6075	11,611.2855	11,842.8819	11,554.9988	11,677.4615	11,497.6567	11,777.5267	12,112.0809	12,167.3123		12,512.5375	12,499.9902	12,428.3028	12,456.0944	12,545.9186	12,575.5864	12,480.9153	12,459.2214	12,430.1791	12,337.4232	12,279.4948	12,465.5928	12,395.5471	12,323.1952	12,179.5859	12,204.7586	12,208.4328	12,237.8661	12,060.0157	11,977.5009	11,604.3278	11,719.2465	12,123.3774	12,006.387	11,810.2043	11,765.8003	11,746.7645	11,725.0707	11,824.3933	11,687.9371	11,586.5037	11,536.2365	11,371.5979	11,343.3373		11,210.7117	11,148.21	11,037.0046	10,907.4279	10,780.9782	10,842.2682	10,900.5093	10,887.923	10,844.8089	10,832.1835	10,716.9521	10,752.9521	10,732.2746	10,775.5841	10,879.48	10,795.4017	10,886.9849	10,880.3008	10,935.1022	10,844.2226	10,760.9261	10,805.9945	10,656.2093		10,563.688	10,539.5316	10,465.499	10,397.3686	10,291.4401	10,684.1963	10,772.5352	10,807.5581	10,791.4929	10,781.0955	10,632.3656	10,641.3168	10,572.4828	10,558.2157	10,545.9421	10,403.1536	10,336.704	10,309.2642	10,260.1697	10,178.2804	10,164.9514	10,091.6614	10,095.8047	10,142.593	10,171.2054	10,156.2738	10,254.7365	10,084.4301	10,053.6678	10,047.8828	10,000
I C E Bof A U S Municipal Securities Index 1556 [Member]
Account Value [Line Items]
Account Value	12,899.3409	12,763.903	12,664.2203	12,555.7339	12,356.9688	12,382.8399	12,522.8598	12,535.4652	12,533.8245	12,561.5363	12,262.5884	11,525.4929		11,671.6555	12,012.0412	12,159.4442	12,128.6911	12,018.8841		12,111.7038	12,125.9499	11,859.776	12,154.9223	11,792.3671	11,804.6324	11,235.8489	11,336.1319	11,774.1193	12,081.5509	11,760.3534	11,990.3119	11,801.7111	12,161.105	12,543.3886	12,614.479		12,962.708	12,944.6803	12,840.0155	12,854.4017	12,952.2436	13,000.3241	12,903.5827	12,861.4247	12,805.5408	12,685.0892	12,608.4364	12,814.1645	12,730.2285	12,644.4318	12,453.9903	12,478.7409	12,486.8844	12,529.0824	12,331.8981	12,213.0072	11,828.8427	12,011.9411	12,480.4216	12,310.4889	12,094.0362	12,055.2997	12,032.5099	12,018.0237	12,108.5024	11,920.3619	11,826.3817	11,776.3203	11,604.8669	11,556.5862		11,374.1081	11,309.9006	11,225.6846	11,094.9286	10,973.8968	11,053.4109	11,124.0611	11,107.1138	11,080.8826	11,068.6574	10,940.1224	10,982.8206	10,946.205	10,993.045	11,110.0751	11,000.3481	11,047.8085	11,027.4598	11,069.4177	10,976.8981	10,897.224	10,922.1347	10,762.9465		10,685.8535	10,661.5031	10,592.9738	10,539.3308	10,425.262	10,819.6708	10,921.9146	10,974.9373	10,949.7465	10,955.589	10,780.454	10,746.9397	10,665.2047	10,618.4247	10,609.5409	10,493.2511	10,410.5357	10,359.774	10,315.6951	10,246.5455	10,223.9759	10,143.7215	10,157.4674	10,191.582	10,243.2441	10,213.0312	10,315.1349	10,133.237	10,074.732	10,061.0061	10,000
I C E Bof A 315 Year U S Municipal Securities Index 1577 [Member]
Account Value [Line Items]
Account Value	12,575.0392	12,462.583	12,337.7359	12,227.9768	12,061.032	12,144.3676	12,276.5241	12,288.2896	12,277.4232	12,314.205	12,052.0418	11,480.6925		11,557.1486	11,829.2011	11,933.0188	11,902.6474	11,817.0447		11,938.2566	11,967.0254	11,726.2824	11,983.4423	11,681.9957	11,634.8946	11,202.2296	11,242.6075	11,611.2855	11,842.8819	11,554.9988	11,677.4615	11,497.6567	11,777.5267	12,112.0809	12,167.3123		12,512.5375	12,499.9902	12,428.3028	12,456.0944	12,545.9186	12,575.5864	12,480.9153	12,459.2214	12,430.1791	12,337.4232	12,279.4948	12,465.5928	12,395.5471	12,323.1952	12,179.5859	12,204.7586	12,208.4328	12,237.8661	12,060.0157	11,977.5009	11,604.3278	11,719.2465	12,123.3774	12,006.387	11,810.2043	11,765.8003	11,746.7645	11,725.0707	11,824.3933	11,687.9371	11,586.5037	11,536.2365	11,371.5979	11,343.3373		11,210.7117	11,148.21	11,037.0046	10,907.4279	10,780.9782	10,842.2682	10,900.5093	10,887.923	10,844.8089	10,832.1835	10,716.9521	10,752.9521	10,732.2746	10,775.5841	10,879.48	10,795.4017	10,886.9849	10,880.3008	10,935.1022	10,844.2226	10,760.9261	10,805.9945	10,656.2093		10,563.688	10,539.5316	10,465.499	10,397.3686	10,291.4401	10,684.1963	10,772.5352	10,807.5581	10,791.4929	10,781.0955	10,632.3656	10,641.3168	10,572.4828	10,558.2157	10,545.9421	10,403.1536	10,336.704	10,309.2642	10,260.1697	10,178.2804	10,164.9514	10,091.6614	10,095.8047	10,142.593	10,171.2054	10,156.2738	10,254.7365	10,084.4301	10,053.6678	10,047.8828	10,000
I C E Bof A U S Municipal Securities Index 1578 [Member]
Account Value [Line Items]
Account Value	12,899.3409	12,763.903	12,664.2203	12,555.7339	12,356.9688	12,382.8399	12,522.8598	12,535.4652	12,533.8245	12,561.5363	12,262.5884	11,525.4929		11,671.6555	12,012.0412	12,159.4442	12,128.6911	12,018.8841		12,111.7038	12,125.9499	11,859.776	12,154.9223	11,792.3671	11,804.6324	11,235.8489	11,336.1319	11,774.1193	12,081.5509	11,760.3534	11,990.3119	11,801.7111	12,161.105	12,543.3886	12,614.479		12,962.708	12,944.6803	12,840.0155	12,854.4017	12,952.2436	13,000.3241	12,903.5827	12,861.4247	12,805.5408	12,685.0892	12,608.4364	12,814.1645	12,730.2285	12,644.4318	12,453.9903	12,478.7409	12,486.8844	12,529.0824	12,331.8981	12,213.0072	11,828.8427	12,011.9411	12,480.4216	12,310.4889	12,094.0362	12,055.2997	12,032.5099	12,018.0237	12,108.5024	11,920.3619	11,826.3817	11,776.3203	11,604.8669	11,556.5862		11,374.1081	11,309.9006	11,225.6846	11,094.9286	10,973.8968	11,053.4109	11,124.0611	11,107.1138	11,080.8826	11,068.6574	10,940.1224	10,982.8206	10,946.205	10,993.045	11,110.0751	11,000.3481	11,047.8085	11,027.4598	11,069.4177	10,976.8981	10,897.224	10,922.1347	10,762.9465		10,685.8535	10,661.5031	10,592.9738	10,539.3308	10,425.262	10,819.6708	10,921.9146	10,974.9373	10,949.7465	10,955.589	10,780.454	10,746.9397	10,665.2047	10,618.4247	10,609.5409	10,493.2511	10,410.5357	10,359.774	10,315.6951	10,246.5455	10,223.9759	10,143.7215	10,157.4674	10,191.582	10,243.2441	10,213.0312	10,315.1349	10,133.237	10,074.732	10,061.0061	10,000
I C E Bof A 315 Year U S Municipal Securities Index 1599 [Member]
Account Value [Line Items]
Account Value	10,303.3904	10,211.2491	10,108.9553	10,019.0239	9,882.2373	9,950.5185	10,058.8013	10,068.4414	10,059.5379	10,089.6752	9,874.8711	9,406.7346		9,469.3791	9,692.286	9,777.3493	9,752.4645	9,682.3257		9,781.6409	9,805.2127	9,607.9593	9,818.664	9,571.6729	9,533.0805	9,178.5753	9,211.6591	9,513.7363	9,703.4954	9,467.6177	9,567.9578	9,420.6343	9,649.9465	9,924.0643	9,969.3183		10,252.1794	10,241.8988	10,183.1616	10,205.9327	10,279.5304	10,303.8387	10,226.2697	10,208.4948	10,184.6989	10,108.6991	10,061.2353	10,213.7152	10,156.3231	10,097.0414	9,979.3747	10,000
I C E Bof A U S Municipal Securities Index 1600 [Member]
Account Value [Line Items]
Account Value	10,337.0532	10,228.5183	10,148.6363	10,061.6993	9,902.4163	9,923.1485	10,035.3552	10,045.4567	10,044.1419	10,066.3492	9,826.7834	9,236.1024		9,353.2317	9,626.0041	9,744.1275	9,719.4831	9,631.4878		9,705.8701	9,717.2864	9,503.9845	9,740.5038	9,449.9655	9,459.7944	9,003.9925	9,084.3555	9,435.3424	9,681.7067	9,424.3109	9,608.5911	9,457.4535	9,745.4583	10,051.8062	10,108.7755		10,387.8333	10,373.3866	10,289.5121	10,301.0406	10,379.4475	10,417.9775	10,340.4525	10,306.6686	10,261.8853	10,165.3599	10,103.9332	10,268.796	10,201.5329	10,132.7786	9,980.1658	10,000
I C E Bof A 315 Year U S Municipal Securities Index 1621 [Member]
Account Value [Line Items]
Account Value	12,575.0392	12,462.583	12,337.7359	12,227.9768	12,061.032	12,144.3676	12,276.5241	12,288.2896	12,277.4232	12,314.205	12,052.0418	11,480.6925		11,557.1486	11,829.2011	11,933.0188	11,902.6474	11,817.0447		11,938.2566	11,967.0254	11,726.2824	11,983.4423	11,681.9957	11,634.8946	11,202.2296	11,242.6075	11,611.2855	11,842.8819	11,554.9988	11,677.4615	11,497.6567	11,777.5267	12,112.0809	12,167.3123		12,512.5375	12,499.9902	12,428.3028	12,456.0944	12,545.9186	12,575.5864	12,480.9153	12,459.2214	12,430.1791	12,337.4232	12,279.4948	12,465.5928	12,395.5471	12,323.1952	12,179.5859	12,204.7586	12,208.4328	12,237.8661	12,060.0157	11,977.5009	11,604.3278	11,719.2465	12,123.3774	12,006.387	11,810.2043	11,765.8003	11,746.7645	11,725.0707	11,824.3933	11,687.9371	11,586.5037	11,536.2365	11,371.5979	11,343.3373		11,210.7117	11,148.21	11,037.0046	10,907.4279	10,780.9782	10,842.2682	10,900.5093	10,887.923	10,844.8089	10,832.1835	10,716.9521	10,752.9521	10,732.2746	10,775.5841	10,879.48	10,795.4017	10,886.9849	10,880.3008	10,935.1022	10,844.2226	10,760.9261	10,805.9945	10,656.2093		10,563.688	10,539.5316	10,465.499	10,397.3686	10,291.4401	10,684.1963	10,772.5352	10,807.5581	10,791.4929	10,781.0955	10,632.3656	10,641.3168	10,572.4828	10,558.2157	10,545.9421	10,403.1536	10,336.704	10,309.2642	10,260.1697	10,178.2804	10,164.9514	10,091.6614	10,095.8047	10,142.593	10,171.2054	10,156.2738	10,254.7365	10,084.4301	10,053.6678	10,047.8828	10,000
I C E Bof A U S Municipal Securities Index 1622 [Member]
Account Value [Line Items]
Account Value	12,899.3409	12,763.903	12,664.2203	12,555.7339	12,356.9688	12,382.8399	12,522.8598	12,535.4652	12,533.8245	12,561.5363	12,262.5884	11,525.4929		11,671.6555	12,012.0412	12,159.4442	12,128.6911	12,018.8841		12,111.7038	12,125.9499	11,859.776	12,154.9223	11,792.3671	11,804.6324	11,235.8489	11,336.1319	11,774.1193	12,081.5509	11,760.3534	11,990.3119	11,801.7111	12,161.105	12,543.3886	12,614.479		12,962.708	12,944.6803	12,840.0155	12,854.4017	12,952.2436	13,000.3241	12,903.5827	12,861.4247	12,805.5408	12,685.0892	12,608.4364	12,814.1645	12,730.2285	12,644.4318	12,453.9903	12,478.7409	12,486.8844	12,529.0824	12,331.8981	12,213.0072	11,828.8427	12,011.9411	12,480.4216	12,310.4889	12,094.0362	12,055.2997	12,032.5099	12,018.0237	12,108.5024	11,920.3619	11,826.3817	11,776.3203	11,604.8669	11,556.5862		11,374.1081	11,309.9006	11,225.6846	11,094.9286	10,973.8968	11,053.4109	11,124.0611	11,107.1138	11,080.8826	11,068.6574	10,940.1224	10,982.8206	10,946.205	10,993.045	11,110.0751	11,000.3481	11,047.8085	11,027.4598	11,069.4177	10,976.8981	10,897.224	10,922.1347	10,762.9465		10,685.8535	10,661.5031	10,592.9738	10,539.3308	10,425.262	10,819.6708	10,921.9146	10,974.9373	10,949.7465	10,955.589	10,780.454	10,746.9397	10,665.2047	10,618.4247	10,609.5409	10,493.2511	10,410.5357	10,359.774	10,315.6951	10,246.5455	10,223.9759	10,143.7215	10,157.4674	10,191.582	10,243.2441	10,213.0312	10,315.1349	10,133.237	10,074.732	10,061.0061	10,000
I C E Bof A U S Municipal Securities Index 1642 [Member]
Account Value [Line Items]
Account Value	12,899.3409	12,763.903	12,664.2203	12,555.7339	12,356.9688	12,382.8399	12,522.8598	12,535.4652	12,533.8245	12,561.5363	12,262.5884	11,525.4929		11,671.6555	12,012.0412	12,159.4442	12,128.6911	12,018.8841		12,111.7038	12,125.9499	11,859.776	12,154.9223	11,792.3671	11,804.6324	11,235.8489	11,336.1319	11,774.1193	12,081.5509	11,760.3534	11,990.3119	11,801.7111	12,161.105	12,543.3886	12,614.479		12,962.708	12,944.6803	12,840.0155	12,854.4017	12,952.2436	13,000.3241	12,903.5827	12,861.4247	12,805.5408	12,685.0892	12,608.4364	12,814.1645	12,730.2285	12,644.4318	12,453.9903	12,478.7409	12,486.8844	12,529.0824	12,331.8981	12,213.0072	11,828.8427	12,011.9411	12,480.4216	12,310.4889	12,094.0362	12,055.2997	12,032.5099	12,018.0237	12,108.5024	11,920.3619	11,826.3817	11,776.3203	11,604.8669	11,556.5862		11,374.1081	11,309.9006	11,225.6846	11,094.9286	10,973.8968	11,053.4109	11,124.0611	11,107.1138	11,080.8826	11,068.6574	10,940.1224	10,982.8206	10,946.205	10,993.045	11,110.0751	11,000.3481	11,047.8085	11,027.4598	11,069.4177	10,976.8981	10,897.224	10,922.1347	10,762.9465		10,685.8535	10,661.5031	10,592.9738	10,539.3308	10,425.262	10,819.6708	10,921.9146	10,974.9373	10,949.7465	10,955.589	10,780.454	10,746.9397	10,665.2047	10,618.4247	10,609.5409	10,493.2511	10,410.5357	10,359.774	10,315.6951	10,246.5455	10,223.9759	10,143.7215	10,157.4674	10,191.582	10,243.2441	10,213.0312	10,315.1349	10,133.237	10,074.732	10,061.0061	10,000
I C E Bof A U S Municipal Securities Index 1662 [Member]
Account Value [Line Items]
Account Value	12,899.3409	12,763.903	12,664.2203	12,555.7339	12,356.9688	12,382.8399	12,522.8598	12,535.4652	12,533.8245	12,561.5363	12,262.5884	11,525.4929		11,671.6555	12,012.0412	12,159.4442	12,128.6911	12,018.8841		12,111.7038	12,125.9499	11,859.776	12,154.9223	11,792.3671	11,804.6324	11,235.8489	11,336.1319	11,774.1193	12,081.5509	11,760.3534	11,990.3119	11,801.7111	12,161.105	12,543.3886	12,614.479		12,962.708	12,944.6803	12,840.0155	12,854.4017	12,952.2436	13,000.3241	12,903.5827	12,861.4247	12,805.5408	12,685.0892	12,608.4364	12,814.1645	12,730.2285	12,644.4318	12,453.9903	12,478.7409	12,486.8844	12,529.0824	12,331.8981	12,213.0072	11,828.8427	12,011.9411	12,480.4216	12,310.4889	12,094.0362	12,055.2997	12,032.5099	12,018.0237	12,108.5024	11,920.3619	11,826.3817	11,776.3203	11,604.8669	11,556.5862		11,374.1081	11,309.9006	11,225.6846	11,094.9286	10,973.8968	11,053.4109	11,124.0611	11,107.1138	11,080.8826	11,068.6574	10,940.1224	10,982.8206	10,946.205	10,993.045	11,110.0751	11,000.3481	11,047.8085	11,027.4598	11,069.4177	10,976.8981	10,897.224	10,922.1347	10,762.9465		10,685.8535	10,661.5031	10,592.9738	10,539.3308	10,425.262	10,819.6708	10,921.9146	10,974.9373	10,949.7465	10,955.589	10,780.454	10,746.9397	10,665.2047	10,618.4247	10,609.5409	10,493.2511	10,410.5357	10,359.774	10,315.6951	10,246.5455	10,223.9759	10,143.7215	10,157.4674	10,191.582	10,243.2441	10,213.0312	10,315.1349	10,133.237	10,074.732	10,061.0061	10,000
I C E Bof A U S Municipal Securities Index 1682 [Member]
Account Value [Line Items]
Account Value	12,899.3409	12,763.903	12,664.2203	12,555.7339	12,356.9688	12,382.8399	12,522.8598	12,535.4652	12,533.8245	12,561.5363	12,262.5884	11,525.4929		11,671.6555	12,012.0412	12,159.4442	12,128.6911	12,018.8841		12,111.7038	12,125.9499	11,859.776	12,154.9223	11,792.3671	11,804.6324	11,235.8489	11,336.1319	11,774.1193	12,081.5509	11,760.3534	11,990.3119	11,801.7111	12,161.105	12,543.3886	12,614.479		12,962.708	12,944.6803	12,840.0155	12,854.4017	12,952.2436	13,000.3241	12,903.5827	12,861.4247	12,805.5408	12,685.0892	12,608.4364	12,814.1645	12,730.2285	12,644.4318	12,453.9903	12,478.7409	12,486.8844	12,529.0824	12,331.8981	12,213.0072	11,828.8427	12,011.9411	12,480.4216	12,310.4889	12,094.0362	12,055.2997	12,032.5099	12,018.0237	12,108.5024	11,920.3619	11,826.3817	11,776.3203	11,604.8669	11,556.5862		11,374.1081	11,309.9006	11,225.6846	11,094.9286	10,973.8968	11,053.4109	11,124.0611	11,107.1138	11,080.8826	11,068.6574	10,940.1224	10,982.8206	10,946.205	10,993.045	11,110.0751	11,000.3481	11,047.8085	11,027.4598	11,069.4177	10,976.8981	10,897.224	10,922.1347	10,762.9465		10,685.8535	10,661.5031	10,592.9738	10,539.3308	10,425.262	10,819.6708	10,921.9146	10,974.9373	10,949.7465	10,955.589	10,780.454	10,746.9397	10,665.2047	10,618.4247	10,609.5409	10,493.2511	10,410.5357	10,359.774	10,315.6951	10,246.5455	10,223.9759	10,143.7215	10,157.4674	10,191.582	10,243.2441	10,213.0312	10,315.1349	10,133.237	10,074.732	10,061.0061	10,000
I C E Bof A 110 Year U S Municipal Securities Index 1701 [Member]
Account Value [Line Items]
Account Value	11,981.8917	11,895.1358	11,771.5932	11,666.8448	11,540.6301	11,593.6278	11,680.3837	11,690.627	11,680.6955	11,703.5424	11,522.2813	11,126.4908		11,153.6577	11,332.8702	11,388.0947	11,365.8713	11,297.3305		11,387.1594	11,425.1485	11,232.0409	11,436.9951	11,222.5102	11,188.4403	10,893.5681	10,912.5404	11,175.5694	11,355.0045	11,159.1802	11,210.4855	11,063.3835	11,243.0413	11,477.4782	11,516.7143		11,765.1355	11,758.8114	11,724.6079	11,744.9162	11,802.1003	11,818.8903	11,755.8721	11,746.5195	11,734.3612	11,679.6266	11,644.3096	11,755.4267	11,708.3968	11,664.3953	11,585.9676	11,606.3651	11,604.8954	11,617.7663	11,498.7218	11,448.9307	11,168.7109	11,208.2587	11,478.9924	11,411.0752	11,278.67	11,243.7093	11,224.8261	11,192.2704	11,268.4267	11,194.319	11,111.3932	11,066.0111	10,949.2825	10,937.3469		10,853.9757	10,805.1198	10,713.0196	10,616.4213	10,524.6328	10,553.8929	10,601.3236	10,595.7566	10,554.65	10,529.888	10,443.1321	10,475.3761	10,474.2182	10,494.8828	10,535.2323	10,488.0688	10,581.0598	10,584.3109	10,635.349	10,573.934	10,509.8914	10,545.3865	10,452.3956		10,387.2396	10,379.8912	10,316.8283	10,245.66	10,188.5204	10,435.7837	10,481.3439	10,512.5636	10,509.4015	10,485.9311	10,394.6771	10,412.4469	10,364.6599	10,380.4701	10,357.5787	10,250.3808	10,219.8737	10,221.0316	10,181.2611	10,123.0972	10,113.7892	10,061.5931	10,054.6901	10,091.7885	10,101.9427	10,102.8334	10,163.3576	10,037.6328	10,036.9203	10,031.0861	10,000
I C E Bof A U S Municipal Securities Index 1702 [Member]
Account Value [Line Items]
Account Value	12,899.3409	12,763.903	12,664.2203	12,555.7339	12,356.9688	12,382.8399	12,522.8598	12,535.4652	12,533.8245	12,561.5363	12,262.5884	11,525.4929		11,671.6555	12,012.0412	12,159.4442	12,128.6911	12,018.8841		12,111.7038	12,125.9499	11,859.776	12,154.9223	11,792.3671	11,804.6324	11,235.8489	11,336.1319	11,774.1193	12,081.5509	11,760.3534	11,990.3119	11,801.7111	12,161.105	12,543.3886	12,614.479		12,962.708	12,944.6803	12,840.0155	12,854.4017	12,952.2436	13,000.3241	12,903.5827	12,861.4247	12,805.5408	12,685.0892	12,608.4364	12,814.1645	12,730.2285	12,644.4318	12,453.9903	12,478.7409	12,486.8844	12,529.0824	12,331.8981	12,213.0072	11,828.8427	12,011.9411	12,480.4216	12,310.4889	12,094.0362	12,055.2997	12,032.5099	12,018.0237	12,108.5024	11,920.3619	11,826.3817	11,776.3203	11,604.8669	11,556.5862		11,374.1081	11,309.9006	11,225.6846	11,094.9286	10,973.8968	11,053.4109	11,124.0611	11,107.1138	11,080.8826	11,068.6574	10,940.1224	10,982.8206	10,946.205	10,993.045	11,110.0751	11,000.3481	11,047.8085	11,027.4598	11,069.4177	10,976.8981	10,897.224	10,922.1347	10,762.9465		10,685.8535	10,661.5031	10,592.9738	10,539.3308	10,425.262	10,819.6708	10,921.9146	10,974.9373	10,949.7465	10,955.589	10,780.454	10,746.9397	10,665.2047	10,618.4247	10,609.5409	10,493.2511	10,410.5357	10,359.774	10,315.6951	10,246.5455	10,223.9759	10,143.7215	10,157.4674	10,191.582	10,243.2441	10,213.0312	10,315.1349	10,133.237	10,074.732	10,061.0061	10,000
I C E Bof A 110 Year U S Municipal Securities Index 1723 [Member]
Account Value [Line Items]
Account Value	11,981.8917	11,895.1358	11,771.5932	11,666.8448	11,540.6301	11,593.6278	11,680.3837	11,690.627	11,680.6955	11,703.5424	11,522.2813	11,126.4908		11,153.6577	11,332.8702	11,388.0947	11,365.8713	11,297.3305		11,387.1594	11,425.1485	11,232.0409	11,436.9951	11,222.5102	11,188.4403	10,893.5681	10,912.5404	11,175.5694	11,355.0045	11,159.1802	11,210.4855	11,063.3835	11,243.0413	11,477.4782	11,516.7143		11,765.1355	11,758.8114	11,724.6079	11,744.9162	11,802.1003	11,818.8903	11,755.8721	11,746.5195	11,734.3612	11,679.6266	11,644.3096	11,755.4267	11,708.3968	11,664.3953	11,585.9676	11,606.3651	11,604.8954	11,617.7663	11,498.7218	11,448.9307	11,168.7109	11,208.2587	11,478.9924	11,411.0752	11,278.67	11,243.7093	11,224.8261	11,192.2704	11,268.4267	11,194.319	11,111.3932	11,066.0111	10,949.2825	10,937.3469		10,853.9757	10,805.1198	10,713.0196	10,616.4213	10,524.6328	10,553.8929	10,601.3236	10,595.7566	10,554.65	10,529.888	10,443.1321	10,475.3761	10,474.2182	10,494.8828	10,535.2323	10,488.0688	10,581.0598	10,584.3109	10,635.349	10,573.934	10,509.8914	10,545.3865	10,452.3956		10,387.2396	10,379.8912	10,316.8283	10,245.66	10,188.5204	10,435.7837	10,481.3439	10,512.5636	10,509.4015	10,485.9311	10,394.6771	10,412.4469	10,364.6599	10,380.4701	10,357.5787	10,250.3808	10,219.8737	10,221.0316	10,181.2611	10,123.0972	10,113.7892	10,061.5931	10,054.6901	10,091.7885	10,101.9427	10,102.8334	10,163.3576	10,037.6328	10,036.9203	10,031.0861	10,000
I C E Bof A U S Municipal Securities Index 1724 [Member]
Account Value [Line Items]
Account Value	12,899.3409	12,763.903	12,664.2203	12,555.7339	12,356.9688	12,382.8399	12,522.8598	12,535.4652	12,533.8245	12,561.5363	12,262.5884	11,525.4929		11,671.6555	12,012.0412	12,159.4442	12,128.6911	12,018.8841		12,111.7038	12,125.9499	11,859.776	12,154.9223	11,792.3671	11,804.6324	11,235.8489	11,336.1319	11,774.1193	12,081.5509	11,760.3534	11,990.3119	11,801.7111	12,161.105	12,543.3886	12,614.479		12,962.708	12,944.6803	12,840.0155	12,854.4017	12,952.2436	13,000.3241	12,903.5827	12,861.4247	12,805.5408	12,685.0892	12,608.4364	12,814.1645	12,730.2285	12,644.4318	12,453.9903	12,478.7409	12,486.8844	12,529.0824	12,331.8981	12,213.0072	11,828.8427	12,011.9411	12,480.4216	12,310.4889	12,094.0362	12,055.2997	12,032.5099	12,018.0237	12,108.5024	11,920.3619	11,826.3817	11,776.3203	11,604.8669	11,556.5862		11,374.1081	11,309.9006	11,225.6846	11,094.9286	10,973.8968	11,053.4109	11,124.0611	11,107.1138	11,080.8826	11,068.6574	10,940.1224	10,982.8206	10,946.205	10,993.045	11,110.0751	11,000.3481	11,047.8085	11,027.4598	11,069.4177	10,976.8981	10,897.224	10,922.1347	10,762.9465		10,685.8535	10,661.5031	10,592.9738	10,539.3308	10,425.262	10,819.6708	10,921.9146	10,974.9373	10,949.7465	10,955.589	10,780.454	10,746.9397	10,665.2047	10,618.4247	10,609.5409	10,493.2511	10,410.5357	10,359.774	10,315.6951	10,246.5455	10,223.9759	10,143.7215	10,157.4674	10,191.582	10,243.2441	10,213.0312	10,315.1349	10,133.237	10,074.732	10,061.0061	10,000
I C E Bof A 110 Year U S Municipal Securities Index 1745 [Member]
Account Value [Line Items]
Account Value	10,323.5523	10,248.8038	10,142.36	10,052.1091	9,943.363	9,989.0256	10,063.7742	10,072.5997	10,064.0428	10,083.7276	9,927.5537	9,586.5422		9,609.9491	9,764.3578	9,811.9391	9,792.7914	9,733.737		9,811.1332	9,843.8645	9,677.4837	9,854.0715	9,669.2721	9,639.9176	9,385.8569	9,402.2033	9,628.8281	9,783.4287	9,614.7072	9,658.9117	9,532.1691	9,686.9616	9,888.9516	9,922.7573		10,136.796	10,131.3472	10,101.8775	10,119.3752	10,168.6447	10,183.111	10,128.8147	10,120.7565	10,110.281	10,063.1219	10,032.6929	10,128.4309	10,087.9101	10,049.9987	9,982.4256	10,000
I C E Bof A U S Municipal Securities Index 1746 [Member]
Account Value [Line Items]
Account Value	10,337.0532	10,228.5183	10,148.6363	10,061.6993	9,902.4163	9,923.1485	10,035.3552	10,045.4567	10,044.1419	10,066.3492	9,826.7834	9,236.1024		9,353.2317	9,626.0041	9,744.1275	9,719.4831	9,631.4878		9,705.8701	9,717.2864	9,503.9845	9,740.5038	9,449.9655	9,459.7944	9,003.9925	9,084.3555	9,435.3424	9,681.7067	9,424.3109	9,608.5911	9,457.4535	9,745.4583	10,051.8062	10,108.7755		10,387.8333	10,373.3866	10,289.5121	10,301.0406	10,379.4475	10,417.9775	10,340.4525	10,306.6686	10,261.8853	10,165.3599	10,103.9332	10,268.796	10,201.5329	10,132.7786	9,980.1658	10,000
I C E Bof A 110 Year U S Municipal Securities Index 1767 [Member]
Account Value [Line Items]
Account Value	11,981.8917	11,895.1358	11,771.5932	11,666.8448	11,540.6301	11,593.6278	11,680.3837	11,690.627	11,680.6955	11,703.5424	11,522.2813	11,126.4908		11,153.6577	11,332.8702	11,388.0947	11,365.8713	11,297.3305		11,387.1594	11,425.1485	11,232.0409	11,436.9951	11,222.5102	11,188.4403	10,893.5681	10,912.5404	11,175.5694	11,355.0045	11,159.1802	11,210.4855	11,063.3835	11,243.0413	11,477.4782	11,516.7143		11,765.1355	11,758.8114	11,724.6079	11,744.9162	11,802.1003	11,818.8903	11,755.8721	11,746.5195	11,734.3612	11,679.6266	11,644.3096	11,755.4267	11,708.3968	11,664.3953	11,585.9676	11,606.3651	11,604.8954	11,617.7663	11,498.7218	11,448.9307	11,168.7109	11,208.2587	11,478.9924	11,411.0752	11,278.67	11,243.7093	11,224.8261	11,192.2704	11,268.4267	11,194.319	11,111.3932	11,066.0111	10,949.2825	10,937.3469		10,853.9757	10,805.1198	10,713.0196	10,616.4213	10,524.6328	10,553.8929	10,601.3236	10,595.7566	10,554.65	10,529.888	10,443.1321	10,475.3761	10,474.2182	10,494.8828	10,535.2323	10,488.0688	10,581.0598	10,584.3109	10,635.349	10,573.934	10,509.8914	10,545.3865	10,452.3956		10,387.2396	10,379.8912	10,316.8283	10,245.66	10,188.5204	10,435.7837	10,481.3439	10,512.5636	10,509.4015	10,485.9311	10,394.6771	10,412.4469	10,364.6599	10,380.4701	10,357.5787	10,250.3808	10,219.8737	10,221.0316	10,181.2611	10,123.0972	10,113.7892	10,061.5931	10,054.6901	10,091.7885	10,101.9427	10,102.8334	10,163.3576	10,037.6328	10,036.9203	10,031.0861	10,000
I C E Bof A U S Municipal Securities Index 1768 [Member]
Account Value [Line Items]
Account Value	12,899.3409	12,763.903	12,664.2203	12,555.7339	12,356.9688	12,382.8399	12,522.8598	12,535.4652	12,533.8245	12,561.5363	12,262.5884	11,525.4929		11,671.6555	12,012.0412	12,159.4442	12,128.6911	12,018.8841		12,111.7038	12,125.9499	11,859.776	12,154.9223	11,792.3671	11,804.6324	11,235.8489	11,336.1319	11,774.1193	12,081.5509	11,760.3534	11,990.3119	11,801.7111	12,161.105	12,543.3886	12,614.479		12,962.708	12,944.6803	12,840.0155	12,854.4017	12,952.2436	13,000.3241	12,903.5827	12,861.4247	12,805.5408	12,685.0892	12,608.4364	12,814.1645	12,730.2285	12,644.4318	12,453.9903	12,478.7409	12,486.8844	12,529.0824	12,331.8981	12,213.0072	11,828.8427	12,011.9411	12,480.4216	12,310.4889	12,094.0362	12,055.2997	12,032.5099	12,018.0237	12,108.5024	11,920.3619	11,826.3817	11,776.3203	11,604.8669	11,556.5862		11,374.1081	11,309.9006	11,225.6846	11,094.9286	10,973.8968	11,053.4109	11,124.0611	11,107.1138	11,080.8826	11,068.6574	10,940.1224	10,982.8206	10,946.205	10,993.045	11,110.0751	11,000.3481	11,047.8085	11,027.4598	11,069.4177	10,976.8981	10,897.224	10,922.1347	10,762.9465		10,685.8535	10,661.5031	10,592.9738	10,539.3308	10,425.262	10,819.6708	10,921.9146	10,974.9373	10,949.7465	10,955.589	10,780.454	10,746.9397	10,665.2047	10,618.4247	10,609.5409	10,493.2511	10,410.5357	10,359.774	10,315.6951	10,246.5455	10,223.9759	10,143.7215	10,157.4674	10,191.582	10,243.2441	10,213.0312	10,315.1349	10,133.237	10,074.732	10,061.0061	10,000
I C E Bof A 315 Year U S Municipal Securities Index 1788 [Member]
Account Value [Line Items]
Account Value	12,575.0392	12,462.583	12,337.7359	12,227.9768	12,061.032	12,144.3676	12,276.5241	12,288.2896	12,277.4232	12,314.205	12,052.0418	11,480.6925		11,557.1486	11,829.2011	11,933.0188	11,902.6474	11,817.0447		11,938.2566	11,967.0254	11,726.2824	11,983.4423	11,681.9957	11,634.8946	11,202.2296	11,242.6075	11,611.2855	11,842.8819	11,554.9988	11,677.4615	11,497.6567	11,777.5267	12,112.0809	12,167.3123		12,512.5375	12,499.9902	12,428.3028	12,456.0944	12,545.9186	12,575.5864	12,480.9153	12,459.2214	12,430.1791	12,337.4232	12,279.4948	12,465.5928	12,395.5471	12,323.1952	12,179.5859	12,204.7586	12,208.4328	12,237.8661	12,060.0157	11,977.5009	11,604.3278	11,719.2465	12,123.3774	12,006.387	11,810.2043	11,765.8003	11,746.7645	11,725.0707	11,824.3933	11,687.9371	11,586.5037	11,536.2365	11,371.5979	11,343.3373		11,210.7117	11,148.21	11,037.0046	10,907.4279	10,780.9782	10,842.2682	10,900.5093	10,887.923	10,844.8089	10,832.1835	10,716.9521	10,752.9521	10,732.2746	10,775.5841	10,879.48	10,795.4017	10,886.9849	10,880.3008	10,935.1022	10,844.2226	10,760.9261	10,805.9945	10,656.2093		10,563.688	10,539.5316	10,465.499	10,397.3686	10,291.4401	10,684.1963	10,772.5352	10,807.5581	10,791.4929	10,781.0955	10,632.3656	10,641.3168	10,572.4828	10,558.2157	10,545.9421	10,403.1536	10,336.704	10,309.2642	10,260.1697	10,178.2804	10,164.9514	10,091.6614	10,095.8047	10,142.593	10,171.2054	10,156.2738	10,254.7365	10,084.4301	10,053.6678	10,047.8828	10,000
I C E Bof A U S Municipal Securities Index 1789 [Member]
Account Value [Line Items]
Account Value	12,899.3409	12,763.903	12,664.2203	12,555.7339	12,356.9688	12,382.8399	12,522.8598	12,535.4652	12,533.8245	12,561.5363	12,262.5884	11,525.4929		11,671.6555	12,012.0412	12,159.4442	12,128.6911	12,018.8841		12,111.7038	12,125.9499	11,859.776	12,154.9223	11,792.3671	11,804.6324	11,235.8489	11,336.1319	11,774.1193	12,081.5509	11,760.3534	11,990.3119	11,801.7111	12,161.105	12,543.3886	12,614.479		12,962.708	12,944.6803	12,840.0155	12,854.4017	12,952.2436	13,000.3241	12,903.5827	12,861.4247	12,805.5408	12,685.0892	12,608.4364	12,814.1645	12,730.2285	12,644.4318	12,453.9903	12,478.7409	12,486.8844	12,529.0824	12,331.8981	12,213.0072	11,828.8427	12,011.9411	12,480.4216	12,310.4889	12,094.0362	12,055.2997	12,032.5099	12,018.0237	12,108.5024	11,920.3619	11,826.3817	11,776.3203	11,604.8669	11,556.5862		11,374.1081	11,309.9006	11,225.6846	11,094.9286	10,973.8968	11,053.4109	11,124.0611	11,107.1138	11,080.8826	11,068.6574	10,940.1224	10,982.8206	10,946.205	10,993.045	11,110.0751	11,000.3481	11,047.8085	11,027.4598	11,069.4177	10,976.8981	10,897.224	10,922.1347	10,762.9465		10,685.8535	10,661.5031	10,592.9738	10,539.3308	10,425.262	10,819.6708	10,921.9146	10,974.9373	10,949.7465	10,955.589	10,780.454	10,746.9397	10,665.2047	10,618.4247	10,609.5409	10,493.2511	10,410.5357	10,359.774	10,315.6951	10,246.5455	10,223.9759	10,143.7215	10,157.4674	10,191.582	10,243.2441	10,213.0312	10,315.1349	10,133.237	10,074.732	10,061.0061	10,000
I C E Bof A 315 Year U S Municipal Securities Index 1810 [Member]
Account Value [Line Items]
Account Value	12,575.0392	12,462.583	12,337.7359	12,227.9768	12,061.032	12,144.3676	12,276.5241	12,288.2896	12,277.4232	12,314.205	12,052.0418	11,480.6925		11,557.1486	11,829.2011	11,933.0188	11,902.6474	11,817.0447		11,938.2566	11,967.0254	11,726.2824	11,983.4423	11,681.9957	11,634.8946	11,202.2296	11,242.6075	11,611.2855	11,842.8819	11,554.9988	11,677.4615	11,497.6567	11,777.5267	12,112.0809	12,167.3123		12,512.5375	12,499.9902	12,428.3028	12,456.0944	12,545.9186	12,575.5864	12,480.9153	12,459.2214	12,430.1791	12,337.4232	12,279.4948	12,465.5928	12,395.5471	12,323.1952	12,179.5859	12,204.7586	12,208.4328	12,237.8661	12,060.0157	11,977.5009	11,604.3278	11,719.2465	12,123.3774	12,006.387	11,810.2043	11,765.8003	11,746.7645	11,725.0707	11,824.3933	11,687.9371	11,586.5037	11,536.2365	11,371.5979	11,343.3373		11,210.7117	11,148.21	11,037.0046	10,907.4279	10,780.9782	10,842.2682	10,900.5093	10,887.923	10,844.8089	10,832.1835	10,716.9521	10,752.9521	10,732.2746	10,775.5841	10,879.48	10,795.4017	10,886.9849	10,880.3008	10,935.1022	10,844.2226	10,760.9261	10,805.9945	10,656.2093		10,563.688	10,539.5316	10,465.499	10,397.3686	10,291.4401	10,684.1963	10,772.5352	10,807.5581	10,791.4929	10,781.0955	10,632.3656	10,641.3168	10,572.4828	10,558.2157	10,545.9421	10,403.1536	10,336.704	10,309.2642	10,260.1697	10,178.2804	10,164.9514	10,091.6614	10,095.8047	10,142.593	10,171.2054	10,156.2738	10,254.7365	10,084.4301	10,053.6678	10,047.8828	10,000
I C E Bof A U S Municipal Securities Index 1811 [Member]
Account Value [Line Items]
Account Value	12,899.3409	12,763.903	12,664.2203	12,555.7339	12,356.9688	12,382.8399	12,522.8598	12,535.4652	12,533.8245	12,561.5363	12,262.5884	11,525.4929		11,671.6555	12,012.0412	12,159.4442	12,128.6911	12,018.8841		12,111.7038	12,125.9499	11,859.776	12,154.9223	11,792.3671	11,804.6324	11,235.8489	11,336.1319	11,774.1193	12,081.5509	11,760.3534	11,990.3119	11,801.7111	12,161.105	12,543.3886	12,614.479		12,962.708	12,944.6803	12,840.0155	12,854.4017	12,952.2436	13,000.3241	12,903.5827	12,861.4247	12,805.5408	12,685.0892	12,608.4364	12,814.1645	12,730.2285	12,644.4318	12,453.9903	12,478.7409	12,486.8844	12,529.0824	12,331.8981	12,213.0072	11,828.8427	12,011.9411	12,480.4216	12,310.4889	12,094.0362	12,055.2997	12,032.5099	12,018.0237	12,108.5024	11,920.3619	11,826.3817	11,776.3203	11,604.8669	11,556.5862		11,374.1081	11,309.9006	11,225.6846	11,094.9286	10,973.8968	11,053.4109	11,124.0611	11,107.1138	11,080.8826	11,068.6574	10,940.1224	10,982.8206	10,946.205	10,993.045	11,110.0751	11,000.3481	11,047.8085	11,027.4598	11,069.4177	10,976.8981	10,897.224	10,922.1347	10,762.9465		10,685.8535	10,661.5031	10,592.9738	10,539.3308	10,425.262	10,819.6708	10,921.9146	10,974.9373	10,949.7465	10,955.589	10,780.454	10,746.9397	10,665.2047	10,618.4247	10,609.5409	10,493.2511	10,410.5357	10,359.774	10,315.6951	10,246.5455	10,223.9759	10,143.7215	10,157.4674	10,191.582	10,243.2441	10,213.0312	10,315.1349	10,133.237	10,074.732	10,061.0061	10,000
I C E Bof A 315 Year U S Municipal Securities Index 1831 [Member]
Account Value [Line Items]
Account Value	12,575.0392	12,462.583	12,337.7359	12,227.9768	12,061.032	12,144.3676	12,276.5241	12,288.2896	12,277.4232	12,314.205	12,052.0418	11,480.6925		11,557.1486	11,829.2011	11,933.0188	11,902.6474	11,817.0447		11,938.2566	11,967.0254	11,726.2824	11,983.4423	11,681.9957	11,634.8946	11,202.2296	11,242.6075	11,611.2855	11,842.8819	11,554.9988	11,677.4615	11,497.6567	11,777.5267	12,112.0809	12,167.3123		12,512.5375	12,499.9902	12,428.3028	12,456.0944	12,545.9186	12,575.5864	12,480.9153	12,459.2214	12,430.1791	12,337.4232	12,279.4948	12,465.5928	12,395.5471	12,323.1952	12,179.5859	12,204.7586	12,208.4328	12,237.8661	12,060.0157	11,977.5009	11,604.3278	11,719.2465	12,123.3774	12,006.387	11,810.2043	11,765.8003	11,746.7645	11,725.0707	11,824.3933	11,687.9371	11,586.5037	11,536.2365	11,371.5979	11,343.3373		11,210.7117	11,148.21	11,037.0046	10,907.4279	10,780.9782	10,842.2682	10,900.5093	10,887.923	10,844.8089	10,832.1835	10,716.9521	10,752.9521	10,732.2746	10,775.5841	10,879.48	10,795.4017	10,886.9849	10,880.3008	10,935.1022	10,844.2226	10,760.9261	10,805.9945	10,656.2093		10,563.688	10,539.5316	10,465.499	10,397.3686	10,291.4401	10,684.1963	10,772.5352	10,807.5581	10,791.4929	10,781.0955	10,632.3656	10,641.3168	10,572.4828	10,558.2157	10,545.9421	10,403.1536	10,336.704	10,309.2642	10,260.1697	10,178.2804	10,164.9514	10,091.6614	10,095.8047	10,142.593	10,171.2054	10,156.2738	10,254.7365	10,084.4301	10,053.6678	10,047.8828	10,000
I C E Bof A U S Municipal Securities Index 1832 [Member]
Account Value [Line Items]
Account Value	12,899.3409	12,763.903	12,664.2203	12,555.7339	12,356.9688	12,382.8399	12,522.8598	12,535.4652	12,533.8245	12,561.5363	12,262.5884	11,525.4929		11,671.6555	12,012.0412	12,159.4442	12,128.6911	12,018.8841		12,111.7038	12,125.9499	11,859.776	12,154.9223	11,792.3671	11,804.6324	11,235.8489	11,336.1319	11,774.1193	12,081.5509	11,760.3534	11,990.3119	11,801.7111	12,161.105	12,543.3886	12,614.479		12,962.708	12,944.6803	12,840.0155	12,854.4017	12,952.2436	13,000.3241	12,903.5827	12,861.4247	12,805.5408	12,685.0892	12,608.4364	12,814.1645	12,730.2285	12,644.4318	12,453.9903	12,478.7409	12,486.8844	12,529.0824	12,331.8981	12,213.0072	11,828.8427	12,011.9411	12,480.4216	12,310.4889	12,094.0362	12,055.2997	12,032.5099	12,018.0237	12,108.5024	11,920.3619	11,826.3817	11,776.3203	11,604.8669	11,556.5862		11,374.1081	11,309.9006	11,225.6846	11,094.9286	10,973.8968	11,053.4109	11,124.0611	11,107.1138	11,080.8826	11,068.6574	10,940.1224	10,982.8206	10,946.205	10,993.045	11,110.0751	11,000.3481	11,047.8085	11,027.4598	11,069.4177	10,976.8981	10,897.224	10,922.1347	10,762.9465		10,685.8535	10,661.5031	10,592.9738	10,539.3308	10,425.262	10,819.6708	10,921.9146	10,974.9373	10,949.7465	10,955.589	10,780.454	10,746.9397	10,665.2047	10,618.4247	10,609.5409	10,493.2511	10,410.5357	10,359.774	10,315.6951	10,246.5455	10,223.9759	10,143.7215	10,157.4674	10,191.582	10,243.2441	10,213.0312	10,315.1349	10,133.237	10,074.732	10,061.0061	10,000
I C E Bof A 315 Year U S Municipal Securities Index 1852 [Member]
Account Value [Line Items]
Account Value	12,575.0392	12,462.583	12,337.7359	12,227.9768	12,061.032	12,144.3676	12,276.5241	12,288.2896	12,277.4232	12,314.205	12,052.0418	11,480.6925		11,557.1486	11,829.2011	11,933.0188	11,902.6474	11,817.0447		11,938.2566	11,967.0254	11,726.2824	11,983.4423	11,681.9957	11,634.8946	11,202.2296	11,242.6075	11,611.2855	11,842.8819	11,554.9988	11,677.4615	11,497.6567	11,777.5267	12,112.0809	12,167.3123		12,512.5375	12,499.9902	12,428.3028	12,456.0944	12,545.9186	12,575.5864	12,480.9153	12,459.2214	12,430.1791	12,337.4232	12,279.4948	12,465.5928	12,395.5471	12,323.1952	12,179.5859	12,204.7586	12,208.4328	12,237.8661	12,060.0157	11,977.5009	11,604.3278	11,719.2465	12,123.3774	12,006.387	11,810.2043	11,765.8003	11,746.7645	11,725.0707	11,824.3933	11,687.9371	11,586.5037	11,536.2365	11,371.5979	11,343.3373		11,210.7117	11,148.21	11,037.0046	10,907.4279	10,780.9782	10,842.2682	10,900.5093	10,887.923	10,844.8089	10,832.1835	10,716.9521	10,752.9521	10,732.2746	10,775.5841	10,879.48	10,795.4017	10,886.9849	10,880.3008	10,935.1022	10,844.2226	10,760.9261	10,805.9945	10,656.2093		10,563.688	10,539.5316	10,465.499	10,397.3686	10,291.4401	10,684.1963	10,772.5352	10,807.5581	10,791.4929	10,781.0955	10,632.3656	10,641.3168	10,572.4828	10,558.2157	10,545.9421	10,403.1536	10,336.704	10,309.2642	10,260.1697	10,178.2804	10,164.9514	10,091.6614	10,095.8047	10,142.593	10,171.2054	10,156.2738	10,254.7365	10,084.4301	10,053.6678	10,047.8828	10,000
I C E Bof A U S Municipal Securities Index 1853 [Member]
Account Value [Line Items]
Account Value	12,899.3409	12,763.903	12,664.2203	12,555.7339	12,356.9688	12,382.8399	12,522.8598	12,535.4652	12,533.8245	12,561.5363	12,262.5884	11,525.4929		11,671.6555	12,012.0412	12,159.4442	12,128.6911	12,018.8841		12,111.7038	12,125.9499	11,859.776	12,154.9223	11,792.3671	11,804.6324	11,235.8489	11,336.1319	11,774.1193	12,081.5509	11,760.3534	11,990.3119	11,801.7111	12,161.105	12,543.3886	12,614.479		12,962.708	12,944.6803	12,840.0155	12,854.4017	12,952.2436	13,000.3241	12,903.5827	12,861.4247	12,805.5408	12,685.0892	12,608.4364	12,814.1645	12,730.2285	12,644.4318	12,453.9903	12,478.7409	12,486.8844	12,529.0824	12,331.8981	12,213.0072	11,828.8427	12,011.9411	12,480.4216	12,310.4889	12,094.0362	12,055.2997	12,032.5099	12,018.0237	12,108.5024	11,920.3619	11,826.3817	11,776.3203	11,604.8669	11,556.5862		11,374.1081	11,309.9006	11,225.6846	11,094.9286	10,973.8968	11,053.4109	11,124.0611	11,107.1138	11,080.8826	11,068.6574	10,940.1224	10,982.8206	10,946.205	10,993.045	11,110.0751	11,000.3481	11,047.8085	11,027.4598	11,069.4177	10,976.8981	10,897.224	10,922.1347	10,762.9465		10,685.8535	10,661.5031	10,592.9738	10,539.3308	10,425.262	10,819.6708	10,921.9146	10,974.9373	10,949.7465	10,955.589	10,780.454	10,746.9397	10,665.2047	10,618.4247	10,609.5409	10,493.2511	10,410.5357	10,359.774	10,315.6951	10,246.5455	10,223.9759	10,143.7215	10,157.4674	10,191.582	10,243.2441	10,213.0312	10,315.1349	10,133.237	10,074.732	10,061.0061	10,000
I C E Bof A 315 Year U S Municipal Securities Index 1874 [Member]
Account Value [Line Items]
Account Value	12,575.0392	12,462.583	12,337.7359	12,227.9768	12,061.032	12,144.3676	12,276.5241	12,288.2896	12,277.4232	12,314.205	12,052.0418	11,480.6925		11,557.1486	11,829.2011	11,933.0188	11,902.6474	11,817.0447		11,938.2566	11,967.0254	11,726.2824	11,983.4423	11,681.9957	11,634.8946	11,202.2296	11,242.6075	11,611.2855	11,842.8819	11,554.9988	11,677.4615	11,497.6567	11,777.5267	12,112.0809	12,167.3123		12,512.5375	12,499.9902	12,428.3028	12,456.0944	12,545.9186	12,575.5864	12,480.9153	12,459.2214	12,430.1791	12,337.4232	12,279.4948	12,465.5928	12,395.5471	12,323.1952	12,179.5859	12,204.7586	12,208.4328	12,237.8661	12,060.0157	11,977.5009	11,604.3278	11,719.2465	12,123.3774	12,006.387	11,810.2043	11,765.8003	11,746.7645	11,725.0707	11,824.3933	11,687.9371	11,586.5037	11,536.2365	11,371.5979	11,343.3373		11,210.7117	11,148.21	11,037.0046	10,907.4279	10,780.9782	10,842.2682	10,900.5093	10,887.923	10,844.8089	10,832.1835	10,716.9521	10,752.9521	10,732.2746	10,775.5841	10,879.48	10,795.4017	10,886.9849	10,880.3008	10,935.1022	10,844.2226	10,760.9261	10,805.9945	10,656.2093		10,563.688	10,539.5316	10,465.499	10,397.3686	10,291.4401	10,684.1963	10,772.5352	10,807.5581	10,791.4929	10,781.0955	10,632.3656	10,641.3168	10,572.4828	10,558.2157	10,545.9421	10,403.1536	10,336.704	10,309.2642	10,260.1697	10,178.2804	10,164.9514	10,091.6614	10,095.8047	10,142.593	10,171.2054	10,156.2738	10,254.7365	10,084.4301	10,053.6678	10,047.8828	10,000
I C E Bof A U S Municipal Securities Index 1875 [Member]
Account Value [Line Items]
Account Value	12,899.3409	12,763.903	12,664.2203	12,555.7339	12,356.9688	12,382.8399	12,522.8598	12,535.4652	12,533.8245	12,561.5363	12,262.5884	11,525.4929		11,671.6555	12,012.0412	12,159.4442	12,128.6911	12,018.8841		12,111.7038	12,125.9499	11,859.776	12,154.9223	11,792.3671	11,804.6324	11,235.8489	11,336.1319	11,774.1193	12,081.5509	11,760.3534	11,990.3119	11,801.7111	12,161.105	12,543.3886	12,614.479		12,962.708	12,944.6803	12,840.0155	12,854.4017	12,952.2436	13,000.3241	12,903.5827	12,861.4247	12,805.5408	12,685.0892	12,608.4364	12,814.1645	12,730.2285	12,644.4318	12,453.9903	12,478.7409	12,486.8844	12,529.0824	12,331.8981	12,213.0072	11,828.8427	12,011.9411	12,480.4216	12,310.4889	12,094.0362	12,055.2997	12,032.5099	12,018.0237	12,108.5024	11,920.3619	11,826.3817	11,776.3203	11,604.8669	11,556.5862		11,374.1081	11,309.9006	11,225.6846	11,094.9286	10,973.8968	11,053.4109	11,124.0611	11,107.1138	11,080.8826	11,068.6574	10,940.1224	10,982.8206	10,946.205	10,993.045	11,110.0751	11,000.3481	11,047.8085	11,027.4598	11,069.4177	10,976.8981	10,897.224	10,922.1347	10,762.9465		10,685.8535	10,661.5031	10,592.9738	10,539.3308	10,425.262	10,819.6708	10,921.9146	10,974.9373	10,949.7465	10,955.589	10,780.454	10,746.9397	10,665.2047	10,618.4247	10,609.5409	10,493.2511	10,410.5357	10,359.774	10,315.6951	10,246.5455	10,223.9759	$ 10,143.7215	$ 10,157.4674	$ 10,191.582	$ 10,243.2441	$ 10,213.0312	$ 10,315.1349	$ 10,133.237	$ 10,074.732	$ 10,061.0061	$ 10,000
M S C I Emerging Markets Net Total Return U S D Index 1895 [Member]
Account Value [Line Items]
Account Value	12,622.1982	11,832.1133	11,644.1067	11,609.5687	11,169.0117	11,106.2889	11,056.8188	10,789.4577	10,299.4913	10,801.0108	10,394.6479	9,624.4117	$ 10,000
I C E Bof A U S Municipal Securities Index 1906 [Member]
Account Value [Line Items]
Account Value	10,610.1192	10,498.7171	10,416.725	10,327.4914	10,164.0008	10,185.2806	10,300.4514	10,310.8198	10,309.4702	10,332.2641	10,086.3699	9,480.0854		9,600.3087	9,880.2868	10,001.5306	9,976.2351	9,885.9154	$ 10,000
F T S E 1 Month Treasury Bill Local Currency Index 1925 [Member]
Account Value [Line Items]
Account Value	11,736.1186	11,685.124	11,631.5889	11,578.8031	11,527.6074	11,474.9496	11,424.2109	11,371.6627	11,322.9346	11,270.8251	11,219.1177	11,169.2015		11,117.9327	11,068.5283	11,017.8262	10,969.1529	10,922.088		10,881.3654	10,838.413	10,795.9175	10,758.2656	10,721.2717	10,684.8627	10,652.8037	10,627.7633	10,607.1827	10,587.2419	10,577.4633	10,571.121	10,567.6665	10,566.3688	10,565.7656	10,565.4366		10,564.9797	10,564.011	10,563.554	10,563.0971	10,562.7864	10,562.4208	10,562.0004	10,561.9091	10,561.8177	10,561.6897	10,561.3607	10,560.9403	10,560.4286	10,559.6609	10,558.8933	10,558.1987	10,557.3945	10,556.5172	10,555.3657	10,554.2507	10,553.4282	10,553.1175	10,539.7383	10,526.4322	10,513.1078	10,498.175	10,484.6861	10,467.7062	10,449.4834	10,431.6079	10,412.2519	10,391.2874	10,369.665	10,348.8651		10,327.4254	10,308.2704	10,286.648	10,266.3416	10,247.607	10,229.0552	10,212.5871	10,195.9179	10,180.5281	10,165.7598	10,151.5946	10,137.9047	10,124.7448	10,113.6686	10,102.8116	10,092.96	10,084.7168	10,076.5101	10,068.5045	10,059.8775	10,052.4933	10,045.2554	10,039.4797		10,033.3018	10,029.8291	10,026.0639	10,022.2987	10,019.1367	10,017.7293	10,015.9929	10,013.7265	10,012.1912	10,010.601	10,008.9743	10,007.5487	10,006.1047	10,004.1125	10,002.303	10,001.1698	10,000.2742	10,000.2193	10,000.2742	10,000.2559	10,000
I C E Bof A U S 1 Month Treasury Bill Index 1926 [Member]
Account Value [Line Items]
Account Value	$ 11,685.8263	$ 11,638.9061	$ 11,582.8131	$ 11,530.6796	$ 11,483.5614	$ 11,428.0623	$ 11,379.7564	$ 11,327.8868	$ 11,281.6926	$ 11,232.1987	$ 11,179.5373	$ 11,131.9572		$ 11,084.7731	$ 11,034.4873	$ 10,986.2473	$ 10,941.5049	$ 10,894.5847		$ 10,854.5277	$ 10,815.7245	$ 10,770.8501	$ 10,735.0166	$ 10,702.2186	$ 10,663.8774	$ 10,633.3892	$ 10,610.622	$ 10,588.9107	$ 10,569.5751	$ 10,559.4124	$ 10,553.5391	$ 10,550.7675	$ 10,549.3157	$ 10,548.6557	$ 10,548.3918		$ 10,548.1278	$ 10,547.5339	$ 10,547.0719	$ 10,546.478	$ 10,546.1481	$ 10,545.8181	$ 10,545.3562	$ 10,545.2902	$ 10,545.1582	$ 10,545.0922	$ 10,544.6962	$ 10,544.1683	$ 10,543.5084	$ 10,542.7825	$ 10,542.0566	$ 10,541.1327	$ 10,540.2748	$ 10,539.4169	$ 10,538.0971	$ 10,537.1732	$ 10,536.3813	$ 10,535.9193	$ 10,524.1068	$ 10,511.4364	$ 10,496.7862	$ 10,483.5218	$ 10,469.7956	$ 10,454.4195	$ 10,438.1195	$ 10,419.5098	$ 10,402.4179	$ 10,383.7423	$ 10,361.0411	$ 10,342.1674		$ 10,320.1262	$ 10,301.7805	$ 10,282.7088	$ 10,263.5052	$ 10,243.9716	$ 10,226.6818	$ 10,211.2397	$ 10,193.026	$ 10,177.9799	$ 10,162.2078	$ 10,148.2176	$ 10,135.6131	$ 10,122.0848	$ 10,111.0642	$ 10,100.9674	$ 10,090.8707	$ 10,082.8197	$ 10,074.9007	$ 10,065.1339	$ 10,056.8849	$ 10,050.0878	$ 10,043.5546	$ 10,038.0773		$ 10,032.468	$ 10,028.9044	$ 10,025.3408	$ 10,021.8433	$ 10,019.0056	$ 10,017.3558	$ 10,015.97	$ 10,013.7263	$ 10,011.9445	$ 10,009.8988	$ 10,007.655	$ 10,006.5332	$ 10,005.8073	$ 10,003.6955	$ 10,001.9798	$ 10,001.3198	$ 10,000.264	$ 10,000.198	$ 10,000.33	$ 10,000.264	$ 10,000

Shareholder Report, Average Ann

Shareholder Report, Average Annual Return (Details)	12 Months Ended	60 Months Ended	120 Months Ended
	Sep. 30, 2024	Sep. 30, 2024	Sep. 30, 2024
Thornburg Global Opportunities Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	22.88%	13.36%	8.44%
Thornburg Global Opportunities Fund - Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	26.59%	13.53%	8.11%
Thornburg Global Opportunities Fund - Class I
Average Annual Return [Line Items]
Average Annual Return, Percent	29.05%	14.75%	9.29%
Thornburg Global Opportunities Fund - Class R3
Average Annual Return [Line Items]
Average Annual Return, Percent	28.47%	14.19%	8.74%
Thornburg Global Opportunities Fund - Class R4
Average Annual Return [Line Items]
Average Annual Return, Percent	28.53%	14.28%	8.84%
Thornburg Global Opportunities Fund - Class R5
Average Annual Return [Line Items]
Average Annual Return, Percent	29.06%	14.74%	9.28%
Thornburg Global Opportunities Fund - Class R6
Average Annual Return [Line Items]
Average Annual Return, Percent	29.25%	14.91%
Thornburg International Equity Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	26.01%	9.55%	6.63%
Thornburg International Equity Fund - Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	29.76%	9.74%	6.31%
Thornburg International Equity Fund - Class I
Average Annual Return [Line Items]
Average Annual Return, Percent	32.37%	10.91%	7.47%
Thornburg International Equity Fund - Class R3
Average Annual Return [Line Items]
Average Annual Return, Percent	31.71%	10.36%	6.92%
Thornburg International Equity Fund - Class R4
Average Annual Return [Line Items]
Average Annual Return, Percent	31.98%	10.58%	7.14%
Thornburg International Equity Fund - Class R5
Average Annual Return [Line Items]
Average Annual Return, Percent	32.29%	10.86%	7.42%
Thornburg International Equity Fund - Class R6
Average Annual Return [Line Items]
Average Annual Return, Percent	32.58%	11.09%	7.64%
Thornburg Better World International Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	15.81%	10.93%
Thornburg Better World International Fund - Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	19.42%	11.19%
Thornburg Better World International Fund - Class I
Average Annual Return [Line Items]
Average Annual Return, Percent	21.90%	12.62%
Thornburg International Growth Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	20.13%	5.68%	5.31%
Thornburg International Growth Fund - Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	23.61%	5.73%	4.94%
Thornburg International Growth Fund - Class I
Average Annual Return [Line Items]
Average Annual Return, Percent	26.30%	7.02%	6.18%
Thornburg International Growth Fund - Class R3
Average Annual Return [Line Items]
Average Annual Return, Percent	25.63%	6.48%	5.65%
Thornburg International Growth Fund - Class R4
Average Annual Return [Line Items]
Average Annual Return, Percent	25.77%	6.58%	5.75%
Thornburg International Growth Fund - Class R5
Average Annual Return [Line Items]
Average Annual Return, Percent	26.24%	7.01%	6.18%
Thornburg International Growth Fund - Class R6
Average Annual Return [Line Items]
Average Annual Return, Percent	26.39%	7.12%	6.29%
Thornburg Developing World Fund Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	13.01%	2.20%	2.22%
Thornburg Developing World Fund Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	16.31%	2.31%	1.89%
Thornburg Developing World Fund Class I
Average Annual Return [Line Items]
Average Annual Return, Percent	18.92%	3.54%	3.11%
Thornburg Developing World Fund Class R5
Average Annual Return [Line Items]
Average Annual Return, Percent	18.88%	3.55%	3.11%
Thornburg Developing World Fund Class R6
Average Annual Return [Line Items]
Average Annual Return, Percent	19.04%	3.65%	3.21%
Thornburg Small/Mid Cap Core Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	21.42%	6.87%	7.76%
Thornburg Small/Mid Cap Core Fund - Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	24.90%	6.89%	7.35%
Thornburg Small/Mid Cap Core Fund - Class I
Average Annual Return [Line Items]
Average Annual Return, Percent	27.69%	8.27%	8.67%
Thornburg Small/Mid Cap Core Fund - Class R3
Average Annual Return [Line Items]
Average Annual Return, Percent	27.22%	7.88%	8.28%
Thornburg Small/Mid Cap Core Fund - Class R4
Average Annual Return [Line Items]
Average Annual Return, Percent	27.36%	7.99%	8.38%
Thornburg Small/Mid Cap Core Fund - Class R5
Average Annual Return [Line Items]
Average Annual Return, Percent	27.68%	8.27%	8.66%
Thornburg Small/Mid Cap Growth Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	18.92%	5.15%	6.71%
Thornburg Small/Mid Cap Growth Fund - Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	22.35%	5.22%	6.32%
Thornburg Small/Mid Cap Growth Fund - Class I
Average Annual Return [Line Items]
Average Annual Return, Percent	25.11%	6.56%	7.63%
Thornburg Small/Mid Cap Growth Fund - Class R3
Average Annual Return [Line Items]
Average Annual Return, Percent	24.47%	6.02%	7.08%
Thornburg Small/Mid Cap Growth Fund - Class R4
Average Annual Return [Line Items]
Average Annual Return, Percent	24.58%	6.12%	7.19%
Thornburg Small/Mid Cap Growth Fund - Class R5
Average Annual Return [Line Items]
Average Annual Return, Percent	25.12%	6.56%	7.63%
Thornburg Investment Income Builder Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	19.24%	8.37%	6.46%
Thornburg Investment Income Builder Fund - Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	22.88%	8.55%	6.16%
Thornburg Investment Income Builder Fund - Class I
Average Annual Return [Line Items]
Average Annual Return, Percent	25.12%	9.62%	7.24%
Thornburg Investment Income Builder Fund - Class R3
Average Annual Return [Line Items]
Average Annual Return, Percent	24.37%	8.97%	6.58%
Thornburg Investment Income Builder Fund - Class R4
Average Annual Return [Line Items]
Average Annual Return, Percent	24.51%	9.07%	6.68%
Thornburg Investment Income Builder Fund - Class R5
Average Annual Return [Line Items]
Average Annual Return, Percent	25.01%	9.52%	7.12%
Thornburg Investment Income Builder Fund - Class R6
Average Annual Return [Line Items]
Average Annual Return, Percent	25.23%	9.73%
Thornburg Summit Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	16.42%
Thornburg Summit Fund - Class I
Average Annual Return [Line Items]
Average Annual Return, Percent	22.26%	11.99%
Thornburg Ultra Short Income Fund Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	3.74%	2.38%	1.99%
Thornburg Ultra Short Income Fund Class I
Average Annual Return [Line Items]
Average Annual Return, Percent	6.35%	2.89%	2.34%
Thornburg Limited Term U.S. Government Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	6.62%	0.06%	0.71%
Thornburg Limited Term U.S. Government Fund - Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	8.32%	0.07%	0.55%
Thornburg Limited Term U.S. Government Fund - Class C2
Average Annual Return [Line Items]
Average Annual Return, Percent	8.25%
Thornburg Limited Term U.S. Government Fund - Class I
Average Annual Return [Line Items]
Average Annual Return, Percent	9.49%	0.66%	1.16%
Thornburg Limited Term U.S. Government Fund - Class R3
Average Annual Return [Line Items]
Average Annual Return, Percent	9.03%	0.31%	0.79%
Thornburg Limited Term U.S. Government Fund - Class R4
Average Annual Return [Line Items]
Average Annual Return, Percent	9.04%	0.29%	0.78%
Thornburg Limited Term U.S. Government Fund - Class R5
Average Annual Return [Line Items]
Average Annual Return, Percent	9.47%	0.62%	1.13%
Thornburg Limited Term Income Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	7.56%	1.75%	2.07%
Thornburg Limited Term Income Fund - Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	9.32%	1.83%	2%
Thornburg Limited Term Income Fund - Class C2
Average Annual Return [Line Items]
Average Annual Return, Percent	8.92%
Thornburg Limited Term Income Fund - Class I
Average Annual Return [Line Items]
Average Annual Return, Percent	10.38%	2.33%	2.54%
Thornburg Limited Term Income Fund - Class R3
Average Annual Return [Line Items]
Average Annual Return, Percent	9.83%	1.84%	2.04%
Thornburg Limited Term Income Fund - Class R4
Average Annual Return [Line Items]
Average Annual Return, Percent	9.92%	1.84%	2.05%
Thornburg Limited Term Income Fund - Class R5
Average Annual Return [Line Items]
Average Annual Return, Percent	10.38%	2.35%	2.48%
Thornburg Limited Term Income Fund - Class R6
Average Annual Return [Line Items]
Average Annual Return, Percent	10.53%	2.42%
Thornburg Core Plus Bond Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	7.45%
Thornburg Core Plus Bond Fund - Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	10.78%
Thornburg Core Plus Bond Fund - Class I
Average Annual Return [Line Items]
Average Annual Return, Percent	12.80%
Thornburg Core Plus Bond Fund - Class R3
Average Annual Return [Line Items]
Average Annual Return, Percent	12.23%
Thornburg Core Plus Bond Fund - Class R4
Average Annual Return [Line Items]
Average Annual Return, Percent	12.51%
Thornburg Core Plus Bond Fund - Class R5
Average Annual Return [Line Items]
Average Annual Return, Percent	12.79%
Thornburg Core Plus Bond Fund - Class R6
Average Annual Return [Line Items]
Average Annual Return, Percent	12.82%
Thornburg Strategic Income Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	5.82%	2.49%	2.86%
Thornburg Strategic Income Fund - Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	9.02%	2.68%	2.61%
Thornburg Strategic Income Fund - Class I
Average Annual Return [Line Items]
Average Annual Return, Percent	11.24%	3.83%	3.72%
Thornburg Strategic Income Fund - Class R3
Average Annual Return [Line Items]
Average Annual Return, Percent	10.52%	3.15%	3.14%
Thornburg Strategic Income Fund - Class R4
Average Annual Return [Line Items]
Average Annual Return, Percent	10.52%	3.17%	3.14%
Thornburg Strategic Income Fund - Class R5
Average Annual Return [Line Items]
Average Annual Return, Percent	11.24%	3.83%	3.71%
Thornburg Strategic Income Fund - Class R6
Average Annual Return [Line Items]
Average Annual Return, Percent	11.30%	3.91%
Thornburg Short Duration Municipal Fund Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	2.76%	0.57%	0.62%
Thornburg Short Duration Municipal Fund Class I
Average Annual Return [Line Items]
Average Annual Return, Percent	5.34%	1.07%	0.97%
Thornburg Limited Term Municipal Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	4.56%	0.58%	1.03%
Thornburg Limited Term Municipal Fund - Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	6.22%	0.63%	0.94%
Thornburg Limited Term Municipal Fund - Class C2
Average Annual Return [Line Items]
Average Annual Return, Percent	5.86%
Thornburg Limited Term Municipal Fund - Class I
Average Annual Return [Line Items]
Average Annual Return, Percent	7.22%	1.12%	1.45%
Thornburg Intermediate Municipal Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	6.63%	0.94%	1.65%
Thornburg Intermediate Municipal Fund - Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	7.89%	0.98%	1.50%
Thornburg Intermediate Municipal Fund - Class C2
Average Annual Return [Line Items]
Average Annual Return, Percent	7.84%
Thornburg Intermediate Municipal Fund - Class I
Average Annual Return [Line Items]
Average Annual Return, Percent	9.08%	1.59%	2.11%
Thornburg Strategic Municipal Income Fund Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	8.22%	0.84%	1.70%
Thornburg Strategic Municipal Income Fund Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	9.36%	0.77%	1.47%
Thornburg Strategic Municipal Income Fund Class I
Average Annual Return [Line Items]
Average Annual Return, Percent	10.72%	1.48%	2.16%
Thornburg California Limited Term Municipal Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	4.30%	0.44%	0.85%
Thornburg California Limited Term Municipal Fund - Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	5.80%	0.46%	0.73%
Thornburg California Limited Term Municipal Fund - Class C2
Average Annual Return [Line Items]
Average Annual Return, Percent	5.76%
Thornburg California Limited Term Municipal Fund - Class I
Average Annual Return [Line Items]
Average Annual Return, Percent	6.97%	1.01%	1.28%
Thornburg New Mexico Intermediate Municipal Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	4.71%	0.16%	1.09%
Thornburg New Mexico Intermediate Municipal Fund - Class D
Average Annual Return [Line Items]
Average Annual Return, Percent	6.54%	0.29%	1.03%
Thornburg New Mexico Intermediate Municipal Fund - Class I
Average Annual Return [Line Items]
Average Annual Return, Percent	7.15%	0.88%	1.61%
Thornburg New York Intermediate Municipal Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	5.01%	0.44%	1.17%
Thornburg New York Intermediate Municipal Fund - Class I
Average Annual Return [Line Items]
Average Annual Return, Percent	7.53%	1.16%	1.70%
Thornburg Emerging Markets Managed Account Fund - Class I
Average Annual Return [Line Items]
Average Annual Return, Percent	6.67%
Thornburg Municipal Managed Account Fund - Class I
Average Annual Return [Line Items]
Average Annual Return, Percent	13.02%
C 000161463 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	5.70%	2.54%
Without Sales Load [Member] | Thornburg Global Opportunities Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	28.68%	14.41%	8.94%
Without Sales Load [Member] | Thornburg Global Opportunities Fund - Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	27.59%	13.53%	8.11%
Without Sales Load [Member] | Thornburg International Equity Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	31.94%	10.57%	7.12%
Without Sales Load [Member] | Thornburg International Equity Fund - Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	30.76%	9.74%	6.31%
Without Sales Load [Member] | Thornburg Better World International Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	21.27%	11.97%
Without Sales Load [Member] | Thornburg Better World International Fund - Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	20.42%	11.19%
Without Sales Load [Member] | Thornburg International Growth Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	25.81%	6.65%	5.80%
Without Sales Load [Member] | Thornburg International Growth Fund - Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	24.61%	5.73%	4.94%
Without Sales Load [Member] | Thornburg Developing World Fund Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	18.35%	3.14%	2.69%
Without Sales Load [Member] | Thornburg Developing World Fund Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	17.31%	2.31%	1.89%
Without Sales Load [Member] | Thornburg Small/Mid Cap Core Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	27.14%	7.86%	8.26%
Without Sales Load [Member] | Thornburg Small/Mid Cap Core Fund - Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	25.90%	6.89%	7.35%
Without Sales Load [Member] | Thornburg Small/Mid Cap Growth Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	24.51%	6.12%	7.20%
Without Sales Load [Member] | Thornburg Small/Mid Cap Growth Fund - Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	23.35%	5.22%	6.32%
Without Sales Load [Member] | Thornburg Investment Income Builder Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	24.85%	9.37%	6.95%
Without Sales Load [Member] | Thornburg Investment Income Builder Fund - Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	23.88%	8.55%	6.16%
Without Sales Load [Member] | Thornburg Summit Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	21.88%
Without Sales Load [Member] | Thornburg Ultra Short Income Fund Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	6.12%	2.69%	2.14%
Without Sales Load [Member] | Thornburg Limited Term U.S. Government Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	9.03%	0.36%	0.86%
Without Sales Load [Member] | Thornburg Limited Term U.S. Government Fund - Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	8.82%	0.07%	0.55%
Without Sales Load [Member] | Thornburg Limited Term U.S. Government Fund - Class C2
Average Annual Return [Line Items]
Average Annual Return, Percent	8.90%
Without Sales Load [Member] | Thornburg Limited Term Income Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	10.08%	2.06%	2.23%
Without Sales Load [Member] | Thornburg Limited Term Income Fund - Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	9.82%	1.83%	2%
Without Sales Load [Member] | Thornburg Limited Term Income Fund - Class C2
Average Annual Return [Line Items]
Average Annual Return, Percent	9.57%
Without Sales Load [Member] | Thornburg Core Plus Bond Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	12.50%
Without Sales Load [Member] | Thornburg Core Plus Bond Fund - Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	11.78%
Without Sales Load [Member] | Thornburg Strategic Income Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	10.81%	3.43%	3.33%
Without Sales Load [Member] | Thornburg Strategic Income Fund - Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	10.02%	2.68%	2.61%
Without Sales Load [Member] | Thornburg Short Duration Municipal Fund Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	5.12%	0.88%	0.78%
Without Sales Load [Member] | Thornburg Limited Term Municipal Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	6.94%	0.88%	1.18%
Without Sales Load [Member] | Thornburg Limited Term Municipal Fund - Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	6.72%	0.63%	0.94%
Without Sales Load [Member] | Thornburg Limited Term Municipal Fund - Class C2
Average Annual Return [Line Items]
Average Annual Return, Percent	6.51%
Without Sales Load [Member] | Thornburg Intermediate Municipal Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	8.81%	1.35%	1.85%
Without Sales Load [Member] | Thornburg Intermediate Municipal Fund - Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	8.49%	0.98%	1.50%
Without Sales Load [Member] | Thornburg Intermediate Municipal Fund - Class C2
Average Annual Return [Line Items]
Average Annual Return, Percent	8.49%
Without Sales Load [Member] | Thornburg Strategic Municipal Income Fund Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	10.41%	1.24%	1.91%
Without Sales Load [Member] | Thornburg Strategic Municipal Income Fund Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	9.96%	0.77%	1.47%
Without Sales Load [Member] | Thornburg California Limited Term Municipal Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	6.71%	0.75%	1%
Without Sales Load [Member] | Thornburg California Limited Term Municipal Fund - Class C
Average Annual Return [Line Items]
Average Annual Return, Percent	6.32%	0.46%	0.73%
Without Sales Load [Member] | Thornburg California Limited Term Municipal Fund - Class C2
Average Annual Return [Line Items]
Average Annual Return, Percent	6.41%
Without Sales Load [Member] | Thornburg New Mexico Intermediate Municipal Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	6.89%	0.56%	1.29%
Without Sales Load [Member] | Thornburg New York Intermediate Municipal Fund - Class A
Average Annual Return [Line Items]
Average Annual Return, Percent	7.18%	0.84%	1.38%
M S C I Emerging Markets Net Total Return U S D Index 1896 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	26.22%
Index M S C I All Country World Net Total Return U S D Index 3 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	31.76%	12.19%	9.39%
Index M S C I All Country World Net Total Return U S D Index 15 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	31.76%	12.19%	9.39%
M S C I All Country World Net Total Return U S D Index 26 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	31.76%	12.19%	9.39%
M S C I All Country World Net Total Return U S D Index 37 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	31.76%	12.19%	9.39%
M S C I All Country World Net Total Return U S D Index 48 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	31.76%	12.19%	9.39%
M S C I All Country World Net Total Return U S D Index 59 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	31.76%	12.19%	9.39%
M S C I All Country World Net Total Return U S D Index 70 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	31.76%	12.19%
Index M S C I All Country Worldex U S A Net Total Return U S D Index 83 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	25.35%	7.59%	5.22%
Index M S C I E A F E Net Total Return U S D Index 84 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	24.77%	8.20%	5.71%
Index M S C I All Country Worldex U S A Net Total Return U S D Index 97 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	25.35%	7.59%	5.22%
Index M S C I E A F E Net Total Return U S D Index 98 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	24.77%	8.20%	5.71%
M S C I All Country Worldex U S A Net Total Return U S D Index 110 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	25.35%	7.59%	5.22%
Index M S C I E A F E Net Total Return U S D Index 111 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	24.77%	8.20%	5.71%
M S C I All Country Worldex U S A Net Total Return U S D Index 123 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	25.35%	7.59%	5.22%
Index M S C I E A F E Net Total Return U S D Index 124 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	24.77%	8.20%	5.71%
M S C I All Country Worldex U S A Net Total Return U S D Index 136 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	25.35%	7.59%	5.22%
Index M S C I E A F E Net Total Return U S D Index 137 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	24.77%	8.20%	5.71%
M S C I All Country Worldex U S A Net Total Return U S D Index 149 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	25.35%	7.59%	5.22%
Index M S C I E A F E Net Total Return U S D Index 150 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	24.77%	8.20%	5.71%
M S C I All Country Worldex U S A Net Total Return U S D Index 162 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	25.35%	7.59%	5.22%
Index M S C I E A F E Net Total Return U S D Index 163 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	24.77%	8.20%	5.71%
Index M S C I All Country Worldex U S A Net Total Return U S D Index 175 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	25.35%	7.59%
Index M S C I All Country Worldex U S A Net Total Return U S D Index 187 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	25.35%	7.59%
M S C I All Country Worldex U S A Net Total Return U S D Index 198 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	25.35%	7.59%
Index M S C I All Country Worldex U S A Growth Net Total Return U S D Index 211 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	26.75%	7.09%	5.97%
Index M S C I All Country Worldex U S A Net Total Return U S D Index 212 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	25.35%	7.59%	5.22%
Index M S C I All Country Worldex U S A Growth Net Total Return U S D Index 225 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	26.75%	7.09%	5.97%
Index M S C I All Country Worldex U S A Net Total Return U S D Index 226 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	25.35%	7.59%	5.22%
M S C I All Country Worldex U S A Growth Net Total Return U S D Index 238 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	26.75%	7.09%	5.97%
Index M S C I All Country Worldex U S A Net Total Return U S D Index 239 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	25.35%	7.59%	5.22%
M S C I All Country Worldex U S A Growth Net Total Return U S D Index 251 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	26.75%	7.09%	5.97%
Index M S C I All Country Worldex U S A Net Total Return U S D Index 252 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	25.35%	7.59%	5.22%
M S C I All Country Worldex U S A Growth Net Total Return U S D Index 264 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	26.75%	7.09%	5.97%
Index M S C I All Country Worldex U S A Net Total Return U S D Index 265 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	25.35%	7.59%	5.22%
M S C I All Country Worldex U S A Growth Net Total Return U S D Index 277 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	26.75%	7.09%	5.97%
Index M S C I All Country Worldex U S A Net Total Return U S D Index 278 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	25.35%	7.59%	5.22%
M S C I All Country Worldex U S A Growth Net Total Return U S D Index 290 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	26.75%	7.09%	5.97%
Index M S C I All Country Worldex U S A Net Total Return U S D Index 291 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	25.35%	7.59%	5.22%
Index M S C I Emerging Markets Net Total Return U S D Index 303 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	26.05%	5.75%	4.02%
Index M S C I Emerging Markets Net Total Return U S D Index 315 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	26.05%	5.75%	4.02%
M S C I Emerging Markets Net Total Return U S D Index 326 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	26.05%	5.75%	4.02%
M S C I Emerging Markets Net Total Return U S D Index 337 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	26.05%	5.75%	4.02%
M S C I Emerging Markets Net Total Return U S D Index 348 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	26.05%	5.75%	4.02%
Index Russell 2500 Index Total Return 361 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	26.17%	10.43%	9.50%
Index Russell 3000 Index Total Return 362 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	35.19%	15.26%	12.83%
Index Russell 2500 Index Total Return 375 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	26.17%	10.43%	9.50%
Index Russell 3000 Index Total Return 376 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	35.19%	15.26%	12.83%
Russell 2500 Index Total Return 388 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	26.17%	10.43%	9.50%
Index Russell 3000 Index Total Return 389 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	35.19%	15.26%	12.83%
Russell 2500 Index Total Return 401 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	26.17%	10.43%	9.50%
Index Russell 3000 Index Total Return 402 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	35.19%	15.26%	12.83%
Russell 2500 Index Total Return 414 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	26.17%	10.43%	9.50%
Index Russell 3000 Index Total Return 415 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	35.19%	15.26%	12.83%
Russell 2500 Index Total Return 427 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	26.17%	10.43%	9.50%
Index Russell 3000 Index Total Return 428 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	35.19%	15.26%	12.83%
Index Russell 2500 Growth Index Total Return 441 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	25.20%	9.75%	9.98%
Index Russell 3000 Index Total Return 442 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	35.19%	15.26%	12.83%
Index Russell 2500 Growth Index Total Return 455 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	25.20%	9.75%	9.98%
Index Russell 3000 Index Total Return 456 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	35.19%	15.26%	12.83%
Russell 2500 Growth Index Total Return 468 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	25.20%	9.75%	9.98%
Index Russell 3000 Index Total Return 469 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	35.19%	15.26%	12.83%
Russell 2500 Growth Index Total Return 481 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	25.20%	9.75%	9.98%
Index Russell 3000 Index Total Return 482 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	35.19%	15.26%	12.83%
Russell 2500 Growth Index Total Return 494 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	25.20%	9.75%	9.98%
Index Russell 3000 Index Total Return 495 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	35.19%	15.26%	12.83%
Russell 2500 Growth Index Total Return 507 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	25.20%	9.75%	9.98%
Index Russell 3000 Index Total Return 508 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	35.19%	15.26%	12.83%
Index M S C I World Net Total Return U S D Index 522 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	32.43%	13.04%	10.07%
Index Investment Income Builder Funds Blended Index 523 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	26.96%	9.97%	8.15%
Index Bloomberg U S Aggregate Total Return Value Index U S D 524 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	11.57%	0.33%	1.84%
Index M S C I World Net Total Return U S D Index 544 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	32.43%	13.04%	10.07%
Index Investment Income Builder Funds Blended Index 545 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	26.96%	9.97%	8.15%
Index Bloomberg U S Aggregate Total Return Value Index U S D 546 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	11.57%	0.33%	1.84%
M S C I World Net Total Return U S D Index 565 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	32.43%	13.04%	10.07%
Index Investment Income Builder Funds Blended Index 566 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	26.96%	9.97%	8.15%
Index Bloomberg U S Aggregate Total Return Value Index U S D 567 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	11.57%	0.33%	1.84%
M S C I World Net Total Return U S D Index 586 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	32.43%	13.04%	10.07%
Index Investment Income Builder Funds Blended Index 587 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	26.96%	9.97%	8.15%
Index Bloomberg U S Aggregate Total Return Value Index U S D 588 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	11.57%	0.33%	1.84%
M S C I World Net Total Return U S D Index 607 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	32.43%	13.04%	10.07%
Index Investment Income Builder Funds Blended Index 608 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	26.96%	9.97%	8.15%
Index Bloomberg U S Aggregate Total Return Value Index U S D 609 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	11.57%	0.33%	1.84%
M S C I World Net Total Return U S D Index 628 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	32.43%	13.04%	10.07%
Index Investment Income Builder Funds Blended Index 629 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	26.96%	9.97%	8.15%
Index Bloomberg U S Aggregate Total Return Value Index U S D 630 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	11.57%	0.33%	1.84%
M S C I World Net Total Return U S D Index 649 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	32.43%	13.04%
Index Investment Income Builder Funds Blended Index 650 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	26.96%	9.97%
Index Bloomberg U S Aggregate Total Return Value Index U S D 651 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	11.57%	0.33%
Index M S C I All Country World Net Total Return U S D Index 671 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	31.76%
Index Summit Funds Blended Index 672 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	23.57%
M S C I All Country World Net Total Return U S D Index 691 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	31.76%	12.19%
Index Summit Funds Blended Index 692 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	23.57%	7.03%
Index I C E Bof A U S Treasury Bill Index 711 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	5.54%	2.34%	1.67%
Index Bloomberg U S Aggregate Total Return Value Index U S D 712 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	11.57%	0.33%	1.84%
I C E Bof A U S Treasury Bill Index 734 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	5.54%	2.34%	1.67%
Index Bloomberg U S Aggregate Total Return Value Index U S D 735 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	11.57%	0.33%	1.84%
Index Bloomberg U S Aggregate Total Return Index Value U S D 758 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	11.57%	0.33%	1.84%
Index Bloomberg U S Government Intermediate Total Return Index Value Unhedged 759 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	8.33%	0.84%	1.50%
Index Bloomberg U S Aggregate Total Return Index Value U S D 776 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	11.57%	0.33%	1.84%
Index Bloomberg U S Government Intermediate Total Return Index Value Unhedged 777 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	8.33%	0.84%	1.50%
Index Bloomberg U S Aggregate Total Return Index Value U S D 794 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	11.57%
Index Bloomberg U S Government Intermediate Total Return Index Value Unhedged 795 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	8.33%
Bloomberg U S Aggregate Total Return Index Value U S D 811 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	11.57%	0.33%	1.84%
Index Bloomberg U S Government Intermediate Total Return Index Value Unhedged 812 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	8.33%	0.84%	1.50%
Bloomberg U S Aggregate Total Return Index Value U S D 828 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	11.57%	0.33%	1.84%
Index Bloomberg U S Government Intermediate Total Return Index Value Unhedged 829 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	8.33%	0.84%	1.50%
Bloomberg U S Aggregate Total Return Index Value U S D 845 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	11.57%	0.33%	1.84%
Index Bloomberg U S Government Intermediate Total Return Index Value Unhedged 846 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	8.33%	0.84%	1.50%
Bloomberg U S Aggregate Total Return Index Value U S D 862 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	11.57%	0.33%	1.84%
Index Bloomberg U S Government Intermediate Total Return Index Value Unhedged 863 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	8.33%	0.84%	1.50%
Index Bloomberg Intermediate U S Government Credit Total Return Index Value Unhedged 880 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	9.45%	1.26%	1.96%
Index Bloomberg U S Aggregate Total Return Value Index U S D 881 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	11.57%	0.33%	1.84%
Index Bloomberg Intermediate U S Government Credit Total Return Index Value Unhedged 904 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	9.45%	1.26%	1.96%
Index Bloomberg U S Aggregate Total Return Value Index U S D 905 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	11.57%	0.33%	1.84%
Index Bloomberg Intermediate U S Government Credit Total Return Index Value Unhedged 928 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	9.45%
Index Bloomberg U S Aggregate Total Return Value Index U S D 929 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	11.57%
Bloomberg Intermediate U S Government Credit Total Return Index Value Unhedged 951 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	9.45%	1.26%	1.96%
Index Bloomberg U S Aggregate Total Return Value Index U S D 952 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	11.57%	0.33%	1.84%
Bloomberg Intermediate U S Government Credit Total Return Index Value Unhedged 974 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	9.45%	1.26%	1.96%
Index Bloomberg U S Aggregate Total Return Value Index U S D 975 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	11.57%	0.33%	1.84%
Bloomberg Intermediate U S Government Credit Total Return Index Value Unhedged 997 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	9.45%	1.26%	1.96%
Index Bloomberg U S Aggregate Total Return Value Index U S D 998 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	11.57%	0.33%	1.84%
Bloomberg Intermediate U S Government Credit Total Return Index Value Unhedged 1020 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	9.45%	1.26%	1.96%
Index Bloomberg U S Aggregate Total Return Value Index U S D 1021 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	11.57%	0.33%	1.84%
Bloomberg Intermediate U S Government Credit Total Return Index Value Unhedged 1043 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	9.45%	1.26%
Index Bloomberg U S Aggregate Total Return Value Index U S D 1044 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	11.57%	0.33%
Index Bloomberg U S Aggregate Total Return Value Index U S D 1066 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	12.34%
Index Bloomberg U S Aggregate Total Return Value Index U S D 1088 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	12.34%
Bloomberg U S Aggregate Total Return Value Index U S D 1109 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	12.34%
Bloomberg U S Aggregate Total Return Value Index U S D 1130 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	12.34%
Bloomberg U S Aggregate Total Return Value Index U S D 1151 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	12.34%
Bloomberg U S Aggregate Total Return Value Index U S D 1172 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	12.34%
Bloomberg U S Aggregate Total Return Value Index U S D 1193 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	12.34%
Index Bloomberg U S Universal Total Return Index Value Unhedged 1217 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	12.08%	0.70%	2.15%
Index Strategic Income Funds Blended Index 1218 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	15.53%	2.95%	3.60%
Index Bloomberg U S Universal Total Return Index Value Unhedged 1248 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	12.08%	0.70%	2.15%
Index Strategic Income Funds Blended Index 1249 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	15.53%	2.95%	3.60%
Bloomberg U S Universal Total Return Index Value Unhedged 1278 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	12.08%	0.70%	2.15%
Index Strategic Income Funds Blended Index 1279 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	15.53%	2.95%	3.60%
Bloomberg U S Universal Total Return Index Value Unhedged 1308 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	12.08%	0.70%	2.15%
Index Strategic Income Funds Blended Index 1309 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	15.53%	2.95%	3.60%
Bloomberg U S Universal Total Return Index Value Unhedged 1338 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	12.08%	0.70%	2.15%
Index Strategic Income Funds Blended Index 1339 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	15.53%	2.95%	3.60%
Bloomberg U S Universal Total Return Index Value Unhedged 1368 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	12.08%	0.70%	2.15%
Index Strategic Income Funds Blended Index 1369 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	15.53%	2.95%	3.60%
Bloomberg U S Universal Total Return Index Value Unhedged 1398 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	12.08%	0.70%
Index Strategic Income Funds Blended Index 1399 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	15.53%	2.95%
Index I C E Bof A 13 Year U S Municipal Securities Index 1428 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	5.51%	1.41%	1.31%
Index I C E Bof A U S Municipal Securities Index 1429 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	10.52%	1.43%	2.58%
I C E Bof A 13 Year U S Municipal Securities Index 1449 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	5.51%	1.41%	1.31%
Index I C E Bof A U S Municipal Securities Index 1450 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	10.52%	1.43%	2.58%
Index I C E Bof A 110 Year U S Municipal Securities Index 1471 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	7.43%	1.37%	1.82%
Index I C E Bof A U S Municipal Securities Index 1472 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	10.52%	1.43%	2.58%
Index I C E Bof A 110 Year U S Municipal Securities Index 1493 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	7.43%	1.37%	1.82%
Index I C E Bof A U S Municipal Securities Index 1494 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	10.52%	1.43%	2.58%
Index I C E Bof A 110 Year U S Municipal Securities Index 1515 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	7.43%
Index I C E Bof A U S Municipal Securities Index 1516 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	10.52%
I C E Bof A 110 Year U S Municipal Securities Index 1536 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	7.43%	1.37%	1.82%
Index I C E Bof A U S Municipal Securities Index 1537 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	10.52%	1.43%	2.58%
Index I C E Bof A 315 Year U S Municipal Securities Index 1558 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	8.81%	1.41%	2.32%
Index I C E Bof A U S Municipal Securities Index 1559 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	10.52%	1.43%	2.58%
Index I C E Bof A 315 Year U S Municipal Securities Index 1580 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	8.81%	1.41%	2.32%
Index I C E Bof A U S Municipal Securities Index 1581 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	10.52%	1.43%	2.58%
Index I C E Bof A 315 Year U S Municipal Securities Index 1602 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	8.81%
Index I C E Bof A U S Municipal Securities Index 1603 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	10.52%
I C E Bof A 315 Year U S Municipal Securities Index 1623 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	8.81%	1.41%	2.32%
Index I C E Bof A U S Municipal Securities Index 1624 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	10.52%	1.43%	2.58%
Index I C E Bof A U S Municipal Securities Index 1644 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	10.52%	1.43%	2.58%
Index I C E Bof A U S Municipal Securities Index 1664 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	10.52%	1.43%	2.58%
I C E Bof A U S Municipal Securities Index 1683 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	10.52%	1.43%	2.58%
Index I C E Bof A 110 Year U S Municipal Securities Index 1704 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	7.43%	1.37%	1.82%
Index I C E Bof A U S Municipal Securities Index 1705 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	10.52%	1.43%	2.58%
Index I C E Bof A 110 Year U S Municipal Securities Index 1726 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	7.43%	1.37%	1.82%
Index I C E Bof A U S Municipal Securities Index 1727 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	10.52%	1.43%	2.58%
Index I C E Bof A 110 Year U S Municipal Securities Index 1748 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	7.43%
Index I C E Bof A U S Municipal Securities Index 1749 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	10.52%
I C E Bof A 110 Year U S Municipal Securities Index 1769 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	7.43%	1.37%	1.82%
Index I C E Bof A U S Municipal Securities Index 1770 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	10.52%	1.43%	2.58%
Index I C E Bof A 315 Year U S Municipal Securities Index 1791 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	8.81%	1.41%	2.32%
Index I C E Bof A U S Municipal Securities Index 1792 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	10.52%	1.43%	2.58%
I C E Bof A 315 Year U S Municipal Securities Index 1812 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	8.81%	1.41%	2.32%
Index I C E Bof A U S Municipal Securities Index 1813 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	10.52%	1.43%	2.58%
I C E Bof A 315 Year U S Municipal Securities Index 1833 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	8.81%	1.41%	2.32%
Index I C E Bof A U S Municipal Securities Index 1834 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	10.52%	1.43%	2.58%
Index I C E Bof A 315 Year U S Municipal Securities Index 1855 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	8.81%	1.41%	2.32%
Index I C E Bof A U S Municipal Securities Index 1856 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	10.52%	1.43%	2.58%
I C E Bof A 315 Year U S Municipal Securities Index 1876 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	8.81%	1.41%	2.32%
Index I C E Bof A U S Municipal Securities Index 1877 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	10.52%	1.43%	2.58%
I C E Bof A U S Municipal Securities Index 1907 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	10.52%
F T S E 1 Month Treasury Bill Local Currency Index 1927 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	5.56%	2.31%
Index I C E Bof A U S 1 Month Treasury Bill Index 1928 [Member]
Average Annual Return [Line Items]
Average Annual Return, Percent	5.42%	2.25%

Shareholder Report, Holdings (D

Shareholder Report, Holdings (Details)	Sep. 30, 2024
Thornburg Global Opportunities Fund - Class A | Small Cap 7 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.60%
Thornburg Global Opportunities Fund - Class A | Mid Cap 9 [Member]
Holdings [Line Items]
Percent of Net Asset Value	17.70%
Thornburg Global Opportunities Fund - Class A | Large Cap 11 [Member]
Holdings [Line Items]
Percent of Net Asset Value	79.80%
Thornburg Global Opportunities Fund - Class C | Small Cap 19 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.60%
Thornburg Global Opportunities Fund - Class C | Mid Cap 21 [Member]
Holdings [Line Items]
Percent of Net Asset Value	17.70%
Thornburg Global Opportunities Fund - Class C | Large Cap 23 [Member]
Holdings [Line Items]
Percent of Net Asset Value	79.80%
Thornburg Global Opportunities Fund - Class I | Small Cap 30 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.60%
Thornburg Global Opportunities Fund - Class I | Mid Cap 32 [Member]
Holdings [Line Items]
Percent of Net Asset Value	17.70%
Thornburg Global Opportunities Fund - Class I | Large Cap 34 [Member]
Holdings [Line Items]
Percent of Net Asset Value	79.80%
Thornburg Global Opportunities Fund - Class R3 | Small Cap 41 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.60%
Thornburg Global Opportunities Fund - Class R3 | Mid Cap 43 [Member]
Holdings [Line Items]
Percent of Net Asset Value	17.70%
Thornburg Global Opportunities Fund - Class R3 | Large Cap 45 [Member]
Holdings [Line Items]
Percent of Net Asset Value	79.80%
Thornburg Global Opportunities Fund - Class R4 | Small Cap 52 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.60%
Thornburg Global Opportunities Fund - Class R4 | Mid Cap 54 [Member]
Holdings [Line Items]
Percent of Net Asset Value	17.70%
Thornburg Global Opportunities Fund - Class R4 | Large Cap 56 [Member]
Holdings [Line Items]
Percent of Net Asset Value	79.80%
Thornburg Global Opportunities Fund - Class R5 | Small Cap 63 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.60%
Thornburg Global Opportunities Fund - Class R5 | Mid Cap 65 [Member]
Holdings [Line Items]
Percent of Net Asset Value	17.70%
Thornburg Global Opportunities Fund - Class R5 | Large Cap 67 [Member]
Holdings [Line Items]
Percent of Net Asset Value	79.80%
Thornburg Global Opportunities Fund - Class R6 | Small Cap 74 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.60%
Thornburg Global Opportunities Fund - Class R6 | Mid Cap 76 [Member]
Holdings [Line Items]
Percent of Net Asset Value	17.70%
Thornburg Global Opportunities Fund - Class R6 | Large Cap 78 [Member]
Holdings [Line Items]
Percent of Net Asset Value	79.80%
Thornburg International Equity Fund - Class A | Small Cap 88 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg International Equity Fund - Class A | Mid Cap 90 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.50%
Thornburg International Equity Fund - Class A | Large Cap 92 [Member]
Holdings [Line Items]
Percent of Net Asset Value	96.50%
Thornburg International Equity Fund - Class C | Small Cap 102 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg International Equity Fund - Class C | Mid Cap 104 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.50%
Thornburg International Equity Fund - Class C | Large Cap 106 [Member]
Holdings [Line Items]
Percent of Net Asset Value	96.50%
Thornburg International Equity Fund - Class I | Small Cap 115 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg International Equity Fund - Class I | Mid Cap 117 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.50%
Thornburg International Equity Fund - Class I | Large Cap 119 [Member]
Holdings [Line Items]
Percent of Net Asset Value	96.50%
Thornburg International Equity Fund - Class R3 | Small Cap 128 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg International Equity Fund - Class R3 | Mid Cap 130 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.50%
Thornburg International Equity Fund - Class R3 | Large Cap 132 [Member]
Holdings [Line Items]
Percent of Net Asset Value	96.50%
Thornburg International Equity Fund - Class R4 | Small Cap 141 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg International Equity Fund - Class R4 | Mid Cap 143 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.50%
Thornburg International Equity Fund - Class R4 | Large Cap 145 [Member]
Holdings [Line Items]
Percent of Net Asset Value	96.50%
Thornburg International Equity Fund - Class R5 | Small Cap 154 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg International Equity Fund - Class R5 | Mid Cap 156 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.50%
Thornburg International Equity Fund - Class R5 | Large Cap 158 [Member]
Holdings [Line Items]
Percent of Net Asset Value	96.50%
Thornburg International Equity Fund - Class R6 | Small Cap 167 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg International Equity Fund - Class R6 | Mid Cap 169 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.50%
Thornburg International Equity Fund - Class R6 | Large Cap 171 [Member]
Holdings [Line Items]
Percent of Net Asset Value	96.50%
Thornburg Better World International Fund - Class A | Small Cap 179 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.90%
Thornburg Better World International Fund - Class A | Mid Cap 181 [Member]
Holdings [Line Items]
Percent of Net Asset Value	14.40%
Thornburg Better World International Fund - Class A | Large Cap 183 [Member]
Holdings [Line Items]
Percent of Net Asset Value	84.70%
Thornburg Better World International Fund - Class C | Small Cap 191 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.90%
Thornburg Better World International Fund - Class C | Mid Cap 193 [Member]
Holdings [Line Items]
Percent of Net Asset Value	14.40%
Thornburg Better World International Fund - Class C | Large Cap 195 [Member]
Holdings [Line Items]
Percent of Net Asset Value	84.70%
Thornburg Better World International Fund - Class I | Small Cap 202 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.90%
Thornburg Better World International Fund - Class I | Mid Cap 204 [Member]
Holdings [Line Items]
Percent of Net Asset Value	14.40%
Thornburg Better World International Fund - Class I | Large Cap 206 [Member]
Holdings [Line Items]
Percent of Net Asset Value	84.70%
Thornburg International Growth Fund - Class A | Small Cap 216 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.70%
Thornburg International Growth Fund - Class A | Mid Cap 218 [Member]
Holdings [Line Items]
Percent of Net Asset Value	14%
Thornburg International Growth Fund - Class A | Large Cap 220 [Member]
Holdings [Line Items]
Percent of Net Asset Value	82.30%
Thornburg International Growth Fund - Class C | Small Cap 230 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.70%
Thornburg International Growth Fund - Class C | Mid Cap 232 [Member]
Holdings [Line Items]
Percent of Net Asset Value	14%
Thornburg International Growth Fund - Class C | Large Cap 234 [Member]
Holdings [Line Items]
Percent of Net Asset Value	82.30%
Thornburg International Growth Fund - Class I | Small Cap 243 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.70%
Thornburg International Growth Fund - Class I | Mid Cap 245 [Member]
Holdings [Line Items]
Percent of Net Asset Value	14%
Thornburg International Growth Fund - Class I | Large Cap 247 [Member]
Holdings [Line Items]
Percent of Net Asset Value	82.30%
Thornburg International Growth Fund - Class R3 | Small Cap 256 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.70%
Thornburg International Growth Fund - Class R3 | Mid Cap 258 [Member]
Holdings [Line Items]
Percent of Net Asset Value	14%
Thornburg International Growth Fund - Class R3 | Large Cap 260 [Member]
Holdings [Line Items]
Percent of Net Asset Value	82.30%
Thornburg International Growth Fund - Class R4 | Small Cap 269 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.70%
Thornburg International Growth Fund - Class R4 | Mid Cap 271 [Member]
Holdings [Line Items]
Percent of Net Asset Value	14%
Thornburg International Growth Fund - Class R4 | Large Cap 273 [Member]
Holdings [Line Items]
Percent of Net Asset Value	82.30%
Thornburg International Growth Fund - Class R5 | Small Cap 282 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.70%
Thornburg International Growth Fund - Class R5 | Mid Cap 284 [Member]
Holdings [Line Items]
Percent of Net Asset Value	14%
Thornburg International Growth Fund - Class R5 | Large Cap 286 [Member]
Holdings [Line Items]
Percent of Net Asset Value	82.30%
Thornburg International Growth Fund - Class R6 | Small Cap 295 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.70%
Thornburg International Growth Fund - Class R6 | Mid Cap 297 [Member]
Holdings [Line Items]
Percent of Net Asset Value	14%
Thornburg International Growth Fund - Class R6 | Large Cap 299 [Member]
Holdings [Line Items]
Percent of Net Asset Value	82.30%
Thornburg Developing World Fund Class A | Small Cap 307 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.70%
Thornburg Developing World Fund Class A | Mid Cap 309 [Member]
Holdings [Line Items]
Percent of Net Asset Value	21.70%
Thornburg Developing World Fund Class A | Large Cap 311 [Member]
Holdings [Line Items]
Percent of Net Asset Value	72.60%
Thornburg Developing World Fund Class C | Small Cap 319 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.70%
Thornburg Developing World Fund Class C | Mid Cap 321 [Member]
Holdings [Line Items]
Percent of Net Asset Value	21.70%
Thornburg Developing World Fund Class C | Large Cap 323 [Member]
Holdings [Line Items]
Percent of Net Asset Value	72.60%
Thornburg Developing World Fund Class I | Small Cap 330 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.70%
Thornburg Developing World Fund Class I | Mid Cap 332 [Member]
Holdings [Line Items]
Percent of Net Asset Value	21.70%
Thornburg Developing World Fund Class I | Large Cap 334 [Member]
Holdings [Line Items]
Percent of Net Asset Value	72.60%
Thornburg Developing World Fund Class R5 | Small Cap 341 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.70%
Thornburg Developing World Fund Class R5 | Mid Cap 343 [Member]
Holdings [Line Items]
Percent of Net Asset Value	21.70%
Thornburg Developing World Fund Class R5 | Large Cap 345 [Member]
Holdings [Line Items]
Percent of Net Asset Value	72.60%
Thornburg Developing World Fund Class R6 | Small Cap 352 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.70%
Thornburg Developing World Fund Class R6 | Mid Cap 354 [Member]
Holdings [Line Items]
Percent of Net Asset Value	21.70%
Thornburg Developing World Fund Class R6 | Large Cap 356 [Member]
Holdings [Line Items]
Percent of Net Asset Value	72.60%
Thornburg Small/Mid Cap Core Fund - Class A | Small Cap 366 [Member]
Holdings [Line Items]
Percent of Net Asset Value	9%
Thornburg Small/Mid Cap Core Fund - Class A | Mid Cap 368 [Member]
Holdings [Line Items]
Percent of Net Asset Value	52.20%
Thornburg Small/Mid Cap Core Fund - Class A | Large Cap 370 [Member]
Holdings [Line Items]
Percent of Net Asset Value	38.80%
Thornburg Small/Mid Cap Core Fund - Class C | Small Cap 380 [Member]
Holdings [Line Items]
Percent of Net Asset Value	9%
Thornburg Small/Mid Cap Core Fund - Class C | Mid Cap 382 [Member]
Holdings [Line Items]
Percent of Net Asset Value	52.20%
Thornburg Small/Mid Cap Core Fund - Class C | Large Cap 384 [Member]
Holdings [Line Items]
Percent of Net Asset Value	38.80%
Thornburg Small/Mid Cap Core Fund - Class I | Small Cap 393 [Member]
Holdings [Line Items]
Percent of Net Asset Value	9%
Thornburg Small/Mid Cap Core Fund - Class I | Mid Cap 395 [Member]
Holdings [Line Items]
Percent of Net Asset Value	52.20%
Thornburg Small/Mid Cap Core Fund - Class I | Large Cap 397 [Member]
Holdings [Line Items]
Percent of Net Asset Value	38.80%
Thornburg Small/Mid Cap Core Fund - Class R3 | Small Cap 406 [Member]
Holdings [Line Items]
Percent of Net Asset Value	9%
Thornburg Small/Mid Cap Core Fund - Class R3 | Mid Cap 408 [Member]
Holdings [Line Items]
Percent of Net Asset Value	52.20%
Thornburg Small/Mid Cap Core Fund - Class R3 | Large Cap 410 [Member]
Holdings [Line Items]
Percent of Net Asset Value	38.80%
Thornburg Small/Mid Cap Core Fund - Class R4 | Small Cap 419 [Member]
Holdings [Line Items]
Percent of Net Asset Value	9%
Thornburg Small/Mid Cap Core Fund - Class R4 | Mid Cap 421 [Member]
Holdings [Line Items]
Percent of Net Asset Value	52.20%
Thornburg Small/Mid Cap Core Fund - Class R4 | Large Cap 423 [Member]
Holdings [Line Items]
Percent of Net Asset Value	38.80%
Thornburg Small/Mid Cap Core Fund - Class R5 | Small Cap 432 [Member]
Holdings [Line Items]
Percent of Net Asset Value	9%
Thornburg Small/Mid Cap Core Fund - Class R5 | Mid Cap 434 [Member]
Holdings [Line Items]
Percent of Net Asset Value	52.20%
Thornburg Small/Mid Cap Core Fund - Class R5 | Large Cap 436 [Member]
Holdings [Line Items]
Percent of Net Asset Value	38.80%
Thornburg Small/Mid Cap Growth Fund - Class A | Small Cap 446 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Thornburg Small/Mid Cap Growth Fund - Class A | Mid Cap 448 [Member]
Holdings [Line Items]
Percent of Net Asset Value	52.20%
Thornburg Small/Mid Cap Growth Fund - Class A | Large Cap 450 [Member]
Holdings [Line Items]
Percent of Net Asset Value	44.70%
Thornburg Small/Mid Cap Growth Fund - Class C | Small Cap 460 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Thornburg Small/Mid Cap Growth Fund - Class C | Mid Cap 462 [Member]
Holdings [Line Items]
Percent of Net Asset Value	52.20%
Thornburg Small/Mid Cap Growth Fund - Class C | Large Cap 464 [Member]
Holdings [Line Items]
Percent of Net Asset Value	44.70%
Thornburg Small/Mid Cap Growth Fund - Class I | Small Cap 473 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Thornburg Small/Mid Cap Growth Fund - Class I | Mid Cap 475 [Member]
Holdings [Line Items]
Percent of Net Asset Value	52.20%
Thornburg Small/Mid Cap Growth Fund - Class I | Large Cap 477 [Member]
Holdings [Line Items]
Percent of Net Asset Value	44.70%
Thornburg Small/Mid Cap Growth Fund - Class R3 | Small Cap 486 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Thornburg Small/Mid Cap Growth Fund - Class R3 | Mid Cap 488 [Member]
Holdings [Line Items]
Percent of Net Asset Value	52.20%
Thornburg Small/Mid Cap Growth Fund - Class R3 | Large Cap 490 [Member]
Holdings [Line Items]
Percent of Net Asset Value	44.70%
Thornburg Small/Mid Cap Growth Fund - Class R4 | Small Cap 499 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Thornburg Small/Mid Cap Growth Fund - Class R4 | Mid Cap 501 [Member]
Holdings [Line Items]
Percent of Net Asset Value	52.20%
Thornburg Small/Mid Cap Growth Fund - Class R4 | Large Cap 503 [Member]
Holdings [Line Items]
Percent of Net Asset Value	44.70%
Thornburg Small/Mid Cap Growth Fund - Class R5 | Small Cap 512 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Thornburg Small/Mid Cap Growth Fund - Class R5 | Mid Cap 514 [Member]
Holdings [Line Items]
Percent of Net Asset Value	52.20%
Thornburg Small/Mid Cap Growth Fund - Class R5 | Large Cap 516 [Member]
Holdings [Line Items]
Percent of Net Asset Value	44.70%
Thornburg Investment Income Builder Fund - Class A | Foreign Equity 528 [Member]
Holdings [Line Items]
Percent of Net Asset Value	56.80%
Thornburg Investment Income Builder Fund - Class A | Domestic Equity 530 [Member]
Holdings [Line Items]
Percent of Net Asset Value	27.40%
Thornburg Investment Income Builder Fund - Class A | Domestic Corporate Bonds 532 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.50%
Thornburg Investment Income Builder Fund - Class A | Domestic Other Bonds 534 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.20%
Thornburg Investment Income Builder Fund - Class A | Foreign Bonds 536 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Thornburg Investment Income Builder Fund - Class A | Other Assets Less Liabilities 538 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.20%
Thornburg Investment Income Builder Fund - Class C | Foreign Equity 550 [Member]
Holdings [Line Items]
Percent of Net Asset Value	56.80%
Thornburg Investment Income Builder Fund - Class C | Domestic Equity 552 [Member]
Holdings [Line Items]
Percent of Net Asset Value	27.40%
Thornburg Investment Income Builder Fund - Class C | Domestic Corporate Bonds 554 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.50%
Thornburg Investment Income Builder Fund - Class C | Domestic Other Bonds 556 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.20%
Thornburg Investment Income Builder Fund - Class C | Foreign Bonds 558 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Thornburg Investment Income Builder Fund - Class C | Other Assets Less Liabilities 560 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.20%
Thornburg Investment Income Builder Fund - Class I | Foreign Equity 571 [Member]
Holdings [Line Items]
Percent of Net Asset Value	56.80%
Thornburg Investment Income Builder Fund - Class I | Domestic Equity 573 [Member]
Holdings [Line Items]
Percent of Net Asset Value	27.40%
Thornburg Investment Income Builder Fund - Class I | Domestic Corporate Bonds 575 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.50%
Thornburg Investment Income Builder Fund - Class I | Domestic Other Bonds 577 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.20%
Thornburg Investment Income Builder Fund - Class I | Foreign Bonds 579 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Thornburg Investment Income Builder Fund - Class I | Other Assets Less Liabilities 581 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.20%
Thornburg Investment Income Builder Fund - Class R3 | Foreign Equity 592 [Member]
Holdings [Line Items]
Percent of Net Asset Value	56.80%
Thornburg Investment Income Builder Fund - Class R3 | Domestic Equity 594 [Member]
Holdings [Line Items]
Percent of Net Asset Value	27.40%
Thornburg Investment Income Builder Fund - Class R3 | Domestic Corporate Bonds 596 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.50%
Thornburg Investment Income Builder Fund - Class R3 | Domestic Other Bonds 598 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.20%
Thornburg Investment Income Builder Fund - Class R3 | Foreign Bonds 600 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Thornburg Investment Income Builder Fund - Class R3 | Other Assets Less Liabilities 602 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.20%
Thornburg Investment Income Builder Fund - Class R4 | Foreign Equity 613 [Member]
Holdings [Line Items]
Percent of Net Asset Value	56.80%
Thornburg Investment Income Builder Fund - Class R4 | Domestic Equity 615 [Member]
Holdings [Line Items]
Percent of Net Asset Value	27.40%
Thornburg Investment Income Builder Fund - Class R4 | Domestic Corporate Bonds 617 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.50%
Thornburg Investment Income Builder Fund - Class R4 | Domestic Other Bonds 619 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.20%
Thornburg Investment Income Builder Fund - Class R4 | Foreign Bonds 621 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Thornburg Investment Income Builder Fund - Class R4 | Other Assets Less Liabilities 623 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.20%
Thornburg Investment Income Builder Fund - Class R5 | Foreign Equity 634 [Member]
Holdings [Line Items]
Percent of Net Asset Value	56.80%
Thornburg Investment Income Builder Fund - Class R5 | Domestic Equity 636 [Member]
Holdings [Line Items]
Percent of Net Asset Value	27.40%
Thornburg Investment Income Builder Fund - Class R5 | Domestic Corporate Bonds 638 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.50%
Thornburg Investment Income Builder Fund - Class R5 | Domestic Other Bonds 640 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.20%
Thornburg Investment Income Builder Fund - Class R5 | Foreign Bonds 642 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Thornburg Investment Income Builder Fund - Class R5 | Other Assets Less Liabilities 644 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.20%
Thornburg Investment Income Builder Fund - Class R6 | Foreign Equity 655 [Member]
Holdings [Line Items]
Percent of Net Asset Value	56.80%
Thornburg Investment Income Builder Fund - Class R6 | Domestic Equity 657 [Member]
Holdings [Line Items]
Percent of Net Asset Value	27.40%
Thornburg Investment Income Builder Fund - Class R6 | Domestic Corporate Bonds 659 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.50%
Thornburg Investment Income Builder Fund - Class R6 | Domestic Other Bonds 661 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.20%
Thornburg Investment Income Builder Fund - Class R6 | Foreign Bonds 663 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Thornburg Investment Income Builder Fund - Class R6 | Other Assets Less Liabilities 665 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.20%
Thornburg Summit Fund - Class A | Domestic Equity 676 [Member]
Holdings [Line Items]
Percent of Net Asset Value	31.70%
Thornburg Summit Fund - Class A | Domestic Other Bonds 678 [Member]
Holdings [Line Items]
Percent of Net Asset Value	25.70%
Thornburg Summit Fund - Class A | Foreign Equity 680 [Member]
Holdings [Line Items]
Percent of Net Asset Value	24%
Thornburg Summit Fund - Class A | Domestic Corporate Bonds 682 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.60%
Thornburg Summit Fund - Class A | Foreign Bonds 684 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5%
Thornburg Summit Fund - Class A | Other Assets Less Liabilities 686 [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.90%
Thornburg Summit Fund - Class I | Domestic Equity 696 [Member]
Holdings [Line Items]
Percent of Net Asset Value	31.70%
Thornburg Summit Fund - Class I | Domestic Other Bonds 698 [Member]
Holdings [Line Items]
Percent of Net Asset Value	25.70%
Thornburg Summit Fund - Class I | Foreign Equity 700 [Member]
Holdings [Line Items]
Percent of Net Asset Value	24%
Thornburg Summit Fund - Class I | Domestic Corporate Bonds 702 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.60%
Thornburg Summit Fund - Class I | Foreign Bonds 704 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5%
Thornburg Summit Fund - Class I | Other Assets Less Liabilities 706 [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.90%
Thornburg Ultra Short Income Fund Class A | U S Government 716 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.30%
Thornburg Ultra Short Income Fund Class A | A A A 718 [Member]
Holdings [Line Items]
Percent of Net Asset Value	16.30%
Thornburg Ultra Short Income Fund Class A | A A 720 [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.30%
Thornburg Ultra Short Income Fund Class A | A 722 [Member]
Holdings [Line Items]
Percent of Net Asset Value	13.10%
Thornburg Ultra Short Income Fund Class A | B B B 724 [Member]
Holdings [Line Items]
Percent of Net Asset Value	43.60%
Thornburg Ultra Short Income Fund Class A | N R 726 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.80%
Thornburg Ultra Short Income Fund Class A | Below Invest Grade 728 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.90%
Thornburg Ultra Short Income Fund Class A | Cash Equivalents Other 730 [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.70%
Thornburg Ultra Short Income Fund Class I | U S Government 739 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.30%
Thornburg Ultra Short Income Fund Class I | A A A 741 [Member]
Holdings [Line Items]
Percent of Net Asset Value	16.30%
Thornburg Ultra Short Income Fund Class I | A A 743 [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.30%
Thornburg Ultra Short Income Fund Class I | A 745 [Member]
Holdings [Line Items]
Percent of Net Asset Value	13.10%
Thornburg Ultra Short Income Fund Class I | B B B 747 [Member]
Holdings [Line Items]
Percent of Net Asset Value	43.60%
Thornburg Ultra Short Income Fund Class I | N R 749 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.80%
Thornburg Ultra Short Income Fund Class I | Below Invest Grade 751 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.90%
Thornburg Ultra Short Income Fund Class I | Cash Equivalents Other 753 [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.70%
Thornburg Limited Term U.S. Government Fund - Class A | U S Treasury Securities 763 [Member]
Holdings [Line Items]
Percent of Net Asset Value	20%
Thornburg Limited Term U.S. Government Fund - Class A | U S Government Agencies 765 [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.60%
Thornburg Limited Term U.S. Government Fund - Class A | Mortgage Backed 767 [Member]
Holdings [Line Items]
Percent of Net Asset Value	62.50%
Thornburg Limited Term U.S. Government Fund - Class A | Corporate Bonds 769 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.10%
Thornburg Limited Term U.S. Government Fund - Class A | Cash Equivalents Other 771 [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.80%
Thornburg Limited Term U.S. Government Fund - Class C | U S Treasury Securities 781 [Member]
Holdings [Line Items]
Percent of Net Asset Value	20%
Thornburg Limited Term U.S. Government Fund - Class C | U S Government Agencies 783 [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.60%
Thornburg Limited Term U.S. Government Fund - Class C | Mortgage Backed 785 [Member]
Holdings [Line Items]
Percent of Net Asset Value	62.50%
Thornburg Limited Term U.S. Government Fund - Class C | Corporate Bonds 787 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.10%
Thornburg Limited Term U.S. Government Fund - Class C | Cash Equivalents Other 789 [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.80%
Thornburg Limited Term U.S. Government Fund - Class C2 | U S Treasury Securities 799 [Member]
Holdings [Line Items]
Percent of Net Asset Value	20%
Thornburg Limited Term U.S. Government Fund - Class C2 | U S Government Agencies 801 [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.60%
Thornburg Limited Term U.S. Government Fund - Class C2 | Mortgage Backed 803 [Member]
Holdings [Line Items]
Percent of Net Asset Value	62.50%
Thornburg Limited Term U.S. Government Fund - Class C2 | Corporate Bonds 805 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.10%
Thornburg Limited Term U.S. Government Fund - Class C2 | Cash Equivalents Other 807 [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.80%
Thornburg Limited Term U.S. Government Fund - Class I | U S Treasury Securities 816 [Member]
Holdings [Line Items]
Percent of Net Asset Value	20%
Thornburg Limited Term U.S. Government Fund - Class I | U S Government Agencies 818 [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.60%
Thornburg Limited Term U.S. Government Fund - Class I | Mortgage Backed 820 [Member]
Holdings [Line Items]
Percent of Net Asset Value	62.50%
Thornburg Limited Term U.S. Government Fund - Class I | Corporate Bonds 822 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.10%
Thornburg Limited Term U.S. Government Fund - Class I | Cash Equivalents Other 824 [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.80%
Thornburg Limited Term U.S. Government Fund - Class R3 | U S Treasury Securities 833 [Member]
Holdings [Line Items]
Percent of Net Asset Value	20%
Thornburg Limited Term U.S. Government Fund - Class R3 | U S Government Agencies 835 [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.60%
Thornburg Limited Term U.S. Government Fund - Class R3 | Mortgage Backed 837 [Member]
Holdings [Line Items]
Percent of Net Asset Value	62.50%
Thornburg Limited Term U.S. Government Fund - Class R3 | Corporate Bonds 839 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.10%
Thornburg Limited Term U.S. Government Fund - Class R3 | Cash Equivalents Other 841 [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.80%
Thornburg Limited Term U.S. Government Fund - Class R4 | U S Treasury Securities 850 [Member]
Holdings [Line Items]
Percent of Net Asset Value	20%
Thornburg Limited Term U.S. Government Fund - Class R4 | U S Government Agencies 852 [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.60%
Thornburg Limited Term U.S. Government Fund - Class R4 | Mortgage Backed 854 [Member]
Holdings [Line Items]
Percent of Net Asset Value	62.50%
Thornburg Limited Term U.S. Government Fund - Class R4 | Corporate Bonds 856 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.10%
Thornburg Limited Term U.S. Government Fund - Class R4 | Cash Equivalents Other 858 [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.80%
Thornburg Limited Term U.S. Government Fund - Class R5 | U S Treasury Securities 867 [Member]
Holdings [Line Items]
Percent of Net Asset Value	20%
Thornburg Limited Term U.S. Government Fund - Class R5 | U S Government Agencies 869 [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.60%
Thornburg Limited Term U.S. Government Fund - Class R5 | Mortgage Backed 871 [Member]
Holdings [Line Items]
Percent of Net Asset Value	62.50%
Thornburg Limited Term U.S. Government Fund - Class R5 | Corporate Bonds 873 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.10%
Thornburg Limited Term U.S. Government Fund - Class R5 | Cash Equivalents Other 875 [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.80%
Thornburg Limited Term Income Fund - Class A | U S Government 885 [Member]
Holdings [Line Items]
Percent of Net Asset Value	30.10%
Thornburg Limited Term Income Fund - Class A | A A A 887 [Member]
Holdings [Line Items]
Percent of Net Asset Value	19.90%
Thornburg Limited Term Income Fund - Class A | A A 889 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.60%
Thornburg Limited Term Income Fund - Class A | A 891 [Member]
Holdings [Line Items]
Percent of Net Asset Value	17%
Thornburg Limited Term Income Fund - Class A | B B B 893 [Member]
Holdings [Line Items]
Percent of Net Asset Value	20.10%
Thornburg Limited Term Income Fund - Class A | N R 895 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.30%
Thornburg Limited Term Income Fund - Class A | Below Invest Grade 897 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.10%
Thornburg Limited Term Income Fund - Class A | Cash Equivalents Other 899 [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.70%
Thornburg Limited Term Income Fund - Class C | U S Government 909 [Member]
Holdings [Line Items]
Percent of Net Asset Value	30.10%
Thornburg Limited Term Income Fund - Class C | A A A 911 [Member]
Holdings [Line Items]
Percent of Net Asset Value	19.90%
Thornburg Limited Term Income Fund - Class C | A A 913 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.60%
Thornburg Limited Term Income Fund - Class C | A 915 [Member]
Holdings [Line Items]
Percent of Net Asset Value	17%
Thornburg Limited Term Income Fund - Class C | B B B 917 [Member]
Holdings [Line Items]
Percent of Net Asset Value	20.10%
Thornburg Limited Term Income Fund - Class C | N R 919 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.30%
Thornburg Limited Term Income Fund - Class C | Below Invest Grade 921 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.10%
Thornburg Limited Term Income Fund - Class C | Cash Equivalents Other 923 [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.70%
Thornburg Limited Term Income Fund - Class C2 | U S Government 933 [Member]
Holdings [Line Items]
Percent of Net Asset Value	30.10%
Thornburg Limited Term Income Fund - Class C2 | A A A 935 [Member]
Holdings [Line Items]
Percent of Net Asset Value	19.90%
Thornburg Limited Term Income Fund - Class C2 | A A 937 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.60%
Thornburg Limited Term Income Fund - Class C2 | A 939 [Member]
Holdings [Line Items]
Percent of Net Asset Value	17%
Thornburg Limited Term Income Fund - Class C2 | B B B 941 [Member]
Holdings [Line Items]
Percent of Net Asset Value	20.10%
Thornburg Limited Term Income Fund - Class C2 | N R 943 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.30%
Thornburg Limited Term Income Fund - Class C2 | Below Invest Grade 945 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.10%
Thornburg Limited Term Income Fund - Class C2 | Cash Equivalents Other 947 [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.70%
Thornburg Limited Term Income Fund - Class I | U S Government 956 [Member]
Holdings [Line Items]
Percent of Net Asset Value	30.10%
Thornburg Limited Term Income Fund - Class I | A A A 958 [Member]
Holdings [Line Items]
Percent of Net Asset Value	19.90%
Thornburg Limited Term Income Fund - Class I | A A 960 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.60%
Thornburg Limited Term Income Fund - Class I | A 962 [Member]
Holdings [Line Items]
Percent of Net Asset Value	17%
Thornburg Limited Term Income Fund - Class I | B B B 964 [Member]
Holdings [Line Items]
Percent of Net Asset Value	20.10%
Thornburg Limited Term Income Fund - Class I | N R 966 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.30%
Thornburg Limited Term Income Fund - Class I | Below Invest Grade 968 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.10%
Thornburg Limited Term Income Fund - Class I | Cash Equivalents Other 970 [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.70%
Thornburg Limited Term Income Fund - Class R3 | U S Government 979 [Member]
Holdings [Line Items]
Percent of Net Asset Value	30.10%
Thornburg Limited Term Income Fund - Class R3 | A A A 981 [Member]
Holdings [Line Items]
Percent of Net Asset Value	19.90%
Thornburg Limited Term Income Fund - Class R3 | A A 983 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.60%
Thornburg Limited Term Income Fund - Class R3 | A 985 [Member]
Holdings [Line Items]
Percent of Net Asset Value	17%
Thornburg Limited Term Income Fund - Class R3 | B B B 987 [Member]
Holdings [Line Items]
Percent of Net Asset Value	20.10%
Thornburg Limited Term Income Fund - Class R3 | N R 989 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.30%
Thornburg Limited Term Income Fund - Class R3 | Below Invest Grade 991 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.10%
Thornburg Limited Term Income Fund - Class R3 | Cash Equivalents Other 993 [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.70%
Thornburg Limited Term Income Fund - Class R4 | U S Government 1002 [Member]
Holdings [Line Items]
Percent of Net Asset Value	30.10%
Thornburg Limited Term Income Fund - Class R4 | A A A 1004 [Member]
Holdings [Line Items]
Percent of Net Asset Value	19.90%
Thornburg Limited Term Income Fund - Class R4 | A A 1006 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.60%
Thornburg Limited Term Income Fund - Class R4 | A 1008 [Member]
Holdings [Line Items]
Percent of Net Asset Value	17%
Thornburg Limited Term Income Fund - Class R4 | B B B 1010 [Member]
Holdings [Line Items]
Percent of Net Asset Value	20.10%
Thornburg Limited Term Income Fund - Class R4 | N R 1012 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.30%
Thornburg Limited Term Income Fund - Class R4 | Below Invest Grade 1014 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.10%
Thornburg Limited Term Income Fund - Class R4 | Cash Equivalents Other 1016 [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.70%
Thornburg Limited Term Income Fund - Class R5 | U S Government 1025 [Member]
Holdings [Line Items]
Percent of Net Asset Value	30.10%
Thornburg Limited Term Income Fund - Class R5 | A A A 1027 [Member]
Holdings [Line Items]
Percent of Net Asset Value	19.90%
Thornburg Limited Term Income Fund - Class R5 | A A 1029 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.60%
Thornburg Limited Term Income Fund - Class R5 | A 1031 [Member]
Holdings [Line Items]
Percent of Net Asset Value	17%
Thornburg Limited Term Income Fund - Class R5 | B B B 1033 [Member]
Holdings [Line Items]
Percent of Net Asset Value	20.10%
Thornburg Limited Term Income Fund - Class R5 | N R 1035 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.30%
Thornburg Limited Term Income Fund - Class R5 | Below Invest Grade 1037 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.10%
Thornburg Limited Term Income Fund - Class R5 | Cash Equivalents Other 1039 [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.70%
Thornburg Limited Term Income Fund - Class R6 | U S Government 1048 [Member]
Holdings [Line Items]
Percent of Net Asset Value	30.10%
Thornburg Limited Term Income Fund - Class R6 | A A A 1050 [Member]
Holdings [Line Items]
Percent of Net Asset Value	19.90%
Thornburg Limited Term Income Fund - Class R6 | A A 1052 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.60%
Thornburg Limited Term Income Fund - Class R6 | A 1054 [Member]
Holdings [Line Items]
Percent of Net Asset Value	17%
Thornburg Limited Term Income Fund - Class R6 | B B B 1056 [Member]
Holdings [Line Items]
Percent of Net Asset Value	20.10%
Thornburg Limited Term Income Fund - Class R6 | N R 1058 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.30%
Thornburg Limited Term Income Fund - Class R6 | Below Invest Grade 1060 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.10%
Thornburg Limited Term Income Fund - Class R6 | Cash Equivalents Other 1062 [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.70%
Thornburg Core Plus Bond Fund - Class A | U S Government 1070 [Member]
Holdings [Line Items]
Percent of Net Asset Value	46.70%
Thornburg Core Plus Bond Fund - Class A | A A A 1072 [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.60%
Thornburg Core Plus Bond Fund - Class A | A A 1074 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Thornburg Core Plus Bond Fund - Class A | A 1076 [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.10%
Thornburg Core Plus Bond Fund - Class A | B B B 1078 [Member]
Holdings [Line Items]
Percent of Net Asset Value	16.90%
Thornburg Core Plus Bond Fund - Class A | N R 1080 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.60%
Thornburg Core Plus Bond Fund - Class A | Below Invest Grade 1082 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.70%
Thornburg Core Plus Bond Fund - Class A | Cash Equivalents Other 1084 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.30%
Thornburg Core Plus Bond Fund - Class C | U S Government 1092 [Member]
Holdings [Line Items]
Percent of Net Asset Value	46.70%
Thornburg Core Plus Bond Fund - Class C | A A A 1094 [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.60%
Thornburg Core Plus Bond Fund - Class C | A A 1096 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Thornburg Core Plus Bond Fund - Class C | A 1098 [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.10%
Thornburg Core Plus Bond Fund - Class C | B B B 1100 [Member]
Holdings [Line Items]
Percent of Net Asset Value	16.90%
Thornburg Core Plus Bond Fund - Class C | N R 1102 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.60%
Thornburg Core Plus Bond Fund - Class C | Below Invest Grade 1104 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.70%
Thornburg Core Plus Bond Fund - Class C | Cash Equivalents Other 1106 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.30%
Thornburg Core Plus Bond Fund - Class I | U S Government 1113 [Member]
Holdings [Line Items]
Percent of Net Asset Value	46.70%
Thornburg Core Plus Bond Fund - Class I | A A A 1115 [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.60%
Thornburg Core Plus Bond Fund - Class I | A A 1117 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Thornburg Core Plus Bond Fund - Class I | A 1119 [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.10%
Thornburg Core Plus Bond Fund - Class I | B B B 1121 [Member]
Holdings [Line Items]
Percent of Net Asset Value	16.90%
Thornburg Core Plus Bond Fund - Class I | N R 1123 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.60%
Thornburg Core Plus Bond Fund - Class I | Below Invest Grade 1125 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.70%
Thornburg Core Plus Bond Fund - Class I | Cash Equivalents Other 1127 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.30%
Thornburg Core Plus Bond Fund - Class R3 | U S Government 1134 [Member]
Holdings [Line Items]
Percent of Net Asset Value	46.70%
Thornburg Core Plus Bond Fund - Class R3 | A A A 1136 [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.60%
Thornburg Core Plus Bond Fund - Class R3 | A A 1138 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Thornburg Core Plus Bond Fund - Class R3 | A 1140 [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.10%
Thornburg Core Plus Bond Fund - Class R3 | B B B 1142 [Member]
Holdings [Line Items]
Percent of Net Asset Value	16.90%
Thornburg Core Plus Bond Fund - Class R3 | N R 1144 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.60%
Thornburg Core Plus Bond Fund - Class R3 | Below Invest Grade 1146 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.70%
Thornburg Core Plus Bond Fund - Class R3 | Cash Equivalents Other 1148 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.30%
Thornburg Core Plus Bond Fund - Class R4 | U S Government 1155 [Member]
Holdings [Line Items]
Percent of Net Asset Value	46.70%
Thornburg Core Plus Bond Fund - Class R4 | A A A 1157 [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.60%
Thornburg Core Plus Bond Fund - Class R4 | A A 1159 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Thornburg Core Plus Bond Fund - Class R4 | A 1161 [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.10%
Thornburg Core Plus Bond Fund - Class R4 | B B B 1163 [Member]
Holdings [Line Items]
Percent of Net Asset Value	16.90%
Thornburg Core Plus Bond Fund - Class R4 | N R 1165 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.60%
Thornburg Core Plus Bond Fund - Class R4 | Below Invest Grade 1167 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.70%
Thornburg Core Plus Bond Fund - Class R4 | Cash Equivalents Other 1169 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.30%
Thornburg Core Plus Bond Fund - Class R5 | U S Government 1176 [Member]
Holdings [Line Items]
Percent of Net Asset Value	46.70%
Thornburg Core Plus Bond Fund - Class R5 | A A A 1178 [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.60%
Thornburg Core Plus Bond Fund - Class R5 | A A 1180 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Thornburg Core Plus Bond Fund - Class R5 | A 1182 [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.10%
Thornburg Core Plus Bond Fund - Class R5 | B B B 1184 [Member]
Holdings [Line Items]
Percent of Net Asset Value	16.90%
Thornburg Core Plus Bond Fund - Class R5 | N R 1186 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.60%
Thornburg Core Plus Bond Fund - Class R5 | Below Invest Grade 1188 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.70%
Thornburg Core Plus Bond Fund - Class R5 | Cash Equivalents Other 1190 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.30%
Thornburg Core Plus Bond Fund - Class R6 | U S Government 1197 [Member]
Holdings [Line Items]
Percent of Net Asset Value	46.70%
Thornburg Core Plus Bond Fund - Class R6 | A A A 1199 [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.60%
Thornburg Core Plus Bond Fund - Class R6 | A A 1201 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Thornburg Core Plus Bond Fund - Class R6 | A 1203 [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.10%
Thornburg Core Plus Bond Fund - Class R6 | B B B 1205 [Member]
Holdings [Line Items]
Percent of Net Asset Value	16.90%
Thornburg Core Plus Bond Fund - Class R6 | N R 1207 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.60%
Thornburg Core Plus Bond Fund - Class R6 | Below Invest Grade 1209 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.70%
Thornburg Core Plus Bond Fund - Class R6 | Cash Equivalents Other 1211 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.30%
Thornburg Strategic Income Fund - Class A | U S Government 1222 [Member]
Holdings [Line Items]
Percent of Net Asset Value	26.50%
Thornburg Strategic Income Fund - Class A | A A A 1224 [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.70%
Thornburg Strategic Income Fund - Class A | A A 1226 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Thornburg Strategic Income Fund - Class A | A 1228 [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.80%
Thornburg Strategic Income Fund - Class A | B B B 1230 [Member]
Holdings [Line Items]
Percent of Net Asset Value	22.10%
Thornburg Strategic Income Fund - Class A | B B 1232 [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.20%
Thornburg Strategic Income Fund - Class A | B 1234 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.10%
Thornburg Strategic Income Fund - Class A | C C C 1236 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.10%
Thornburg Strategic Income Fund - Class A | D 1238 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg Strategic Income Fund - Class A | N R 1240 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.20%
Thornburg Strategic Income Fund - Class A | Cash Equivalents Other 1242 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.90%
Thornburg Strategic Income Fund - Class C | U S Government 1253 [Member]
Holdings [Line Items]
Percent of Net Asset Value	26.50%
Thornburg Strategic Income Fund - Class C | A A A 1255 [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.70%
Thornburg Strategic Income Fund - Class C | A A 1257 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Thornburg Strategic Income Fund - Class C | A 1259 [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.80%
Thornburg Strategic Income Fund - Class C | B B B 1261 [Member]
Holdings [Line Items]
Percent of Net Asset Value	22.10%
Thornburg Strategic Income Fund - Class C | B B 1263 [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.20%
Thornburg Strategic Income Fund - Class C | B 1265 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.10%
Thornburg Strategic Income Fund - Class C | C C C 1267 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.10%
Thornburg Strategic Income Fund - Class C | D 1269 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg Strategic Income Fund - Class C | N R 1271 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.20%
Thornburg Strategic Income Fund - Class C | Cash Equivalents Other 1273 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.90%
Thornburg Strategic Income Fund - Class I | U S Government 1283 [Member]
Holdings [Line Items]
Percent of Net Asset Value	26.50%
Thornburg Strategic Income Fund - Class I | A A A 1285 [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.70%
Thornburg Strategic Income Fund - Class I | A A 1287 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Thornburg Strategic Income Fund - Class I | A 1289 [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.80%
Thornburg Strategic Income Fund - Class I | B B B 1291 [Member]
Holdings [Line Items]
Percent of Net Asset Value	22.10%
Thornburg Strategic Income Fund - Class I | B B 1293 [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.20%
Thornburg Strategic Income Fund - Class I | B 1295 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.10%
Thornburg Strategic Income Fund - Class I | C C C 1297 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.10%
Thornburg Strategic Income Fund - Class I | D 1299 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg Strategic Income Fund - Class I | N R 1301 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.20%
Thornburg Strategic Income Fund - Class I | Cash Equivalents Other 1303 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.90%
Thornburg Strategic Income Fund - Class R3 | U S Government 1313 [Member]
Holdings [Line Items]
Percent of Net Asset Value	26.50%
Thornburg Strategic Income Fund - Class R3 | A A A 1315 [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.70%
Thornburg Strategic Income Fund - Class R3 | A A 1317 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Thornburg Strategic Income Fund - Class R3 | A 1319 [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.80%
Thornburg Strategic Income Fund - Class R3 | B B B 1321 [Member]
Holdings [Line Items]
Percent of Net Asset Value	22.10%
Thornburg Strategic Income Fund - Class R3 | B B 1323 [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.20%
Thornburg Strategic Income Fund - Class R3 | B 1325 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.10%
Thornburg Strategic Income Fund - Class R3 | C C C 1327 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.10%
Thornburg Strategic Income Fund - Class R3 | D 1329 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg Strategic Income Fund - Class R3 | N R 1331 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.20%
Thornburg Strategic Income Fund - Class R3 | Cash Equivalents Other 1333 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.90%
Thornburg Strategic Income Fund - Class R4 | U S Government 1343 [Member]
Holdings [Line Items]
Percent of Net Asset Value	26.50%
Thornburg Strategic Income Fund - Class R4 | A A A 1345 [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.70%
Thornburg Strategic Income Fund - Class R4 | A A 1347 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Thornburg Strategic Income Fund - Class R4 | A 1349 [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.80%
Thornburg Strategic Income Fund - Class R4 | B B B 1351 [Member]
Holdings [Line Items]
Percent of Net Asset Value	22.10%
Thornburg Strategic Income Fund - Class R4 | B B 1353 [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.20%
Thornburg Strategic Income Fund - Class R4 | B 1355 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.10%
Thornburg Strategic Income Fund - Class R4 | C C C 1357 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.10%
Thornburg Strategic Income Fund - Class R4 | D 1359 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg Strategic Income Fund - Class R4 | N R 1361 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.20%
Thornburg Strategic Income Fund - Class R4 | Cash Equivalents Other 1363 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.90%
Thornburg Strategic Income Fund - Class R5 | U S Government 1373 [Member]
Holdings [Line Items]
Percent of Net Asset Value	26.50%
Thornburg Strategic Income Fund - Class R5 | A A A 1375 [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.70%
Thornburg Strategic Income Fund - Class R5 | A A 1377 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Thornburg Strategic Income Fund - Class R5 | A 1379 [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.80%
Thornburg Strategic Income Fund - Class R5 | B B B 1381 [Member]
Holdings [Line Items]
Percent of Net Asset Value	22.10%
Thornburg Strategic Income Fund - Class R5 | B B 1383 [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.20%
Thornburg Strategic Income Fund - Class R5 | B 1385 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.10%
Thornburg Strategic Income Fund - Class R5 | C C C 1387 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.10%
Thornburg Strategic Income Fund - Class R5 | D 1389 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg Strategic Income Fund - Class R5 | N R 1391 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.20%
Thornburg Strategic Income Fund - Class R5 | Cash Equivalents Other 1393 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.90%
Thornburg Strategic Income Fund - Class R6 | U S Government 1403 [Member]
Holdings [Line Items]
Percent of Net Asset Value	26.50%
Thornburg Strategic Income Fund - Class R6 | A A A 1405 [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.70%
Thornburg Strategic Income Fund - Class R6 | A A 1407 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Thornburg Strategic Income Fund - Class R6 | A 1409 [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.80%
Thornburg Strategic Income Fund - Class R6 | B B B 1411 [Member]
Holdings [Line Items]
Percent of Net Asset Value	22.10%
Thornburg Strategic Income Fund - Class R6 | B B 1413 [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.20%
Thornburg Strategic Income Fund - Class R6 | B 1415 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.10%
Thornburg Strategic Income Fund - Class R6 | C C C 1417 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.10%
Thornburg Strategic Income Fund - Class R6 | D 1419 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg Strategic Income Fund - Class R6 | N R 1421 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.20%
Thornburg Strategic Income Fund - Class R6 | Cash Equivalents Other 1423 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.90%
Thornburg Short Duration Municipal Fund Class A | A A A 1433 [Member]
Holdings [Line Items]
Percent of Net Asset Value	23.70%
Thornburg Short Duration Municipal Fund Class A | A A 1435 [Member]
Holdings [Line Items]
Percent of Net Asset Value	30.20%
Thornburg Short Duration Municipal Fund Class A | A 1437 [Member]
Holdings [Line Items]
Percent of Net Asset Value	31.10%
Thornburg Short Duration Municipal Fund Class A | B B B 1439 [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.20%
Thornburg Short Duration Municipal Fund Class A | N R 1441 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.30%
Thornburg Short Duration Municipal Fund Class A | Below Invest Grade 1443 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg Short Duration Municipal Fund Class A | Cash Cash Equivalent 1445 [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.60%
Thornburg Short Duration Municipal Fund Class I | A A A 1454 [Member]
Holdings [Line Items]
Percent of Net Asset Value	23.70%
Thornburg Short Duration Municipal Fund Class I | A A 1456 [Member]
Holdings [Line Items]
Percent of Net Asset Value	30.20%
Thornburg Short Duration Municipal Fund Class I | A 1458 [Member]
Holdings [Line Items]
Percent of Net Asset Value	31.10%
Thornburg Short Duration Municipal Fund Class I | B B B 1460 [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.20%
Thornburg Short Duration Municipal Fund Class I | N R 1462 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.30%
Thornburg Short Duration Municipal Fund Class I | Below Invest Grade 1464 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg Short Duration Municipal Fund Class I | Cash Cash Equivalent 1466 [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.60%
Thornburg Limited Term Municipal Fund - Class A | A A A 1476 [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.90%
Thornburg Limited Term Municipal Fund - Class A | A A 1478 [Member]
Holdings [Line Items]
Percent of Net Asset Value	36%
Thornburg Limited Term Municipal Fund - Class A | A 1480 [Member]
Holdings [Line Items]
Percent of Net Asset Value	42.60%
Thornburg Limited Term Municipal Fund - Class A | B B B 1482 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.70%
Thornburg Limited Term Municipal Fund - Class A | N R 1484 [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.40%
Thornburg Limited Term Municipal Fund - Class A | Below Invest Grade 1486 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg Limited Term Municipal Fund - Class A | Cash Cash Equivalent 1488 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.30%
Thornburg Limited Term Municipal Fund - Class C | A A A 1498 [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.90%
Thornburg Limited Term Municipal Fund - Class C | A A 1500 [Member]
Holdings [Line Items]
Percent of Net Asset Value	36%
Thornburg Limited Term Municipal Fund - Class C | A 1502 [Member]
Holdings [Line Items]
Percent of Net Asset Value	42.60%
Thornburg Limited Term Municipal Fund - Class C | B B B 1504 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.70%
Thornburg Limited Term Municipal Fund - Class C | N R 1506 [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.40%
Thornburg Limited Term Municipal Fund - Class C | Below Invest Grade 1508 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg Limited Term Municipal Fund - Class C | Cash Cash Equivalent 1510 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.30%
Thornburg Limited Term Municipal Fund - Class C2 | A A A 1520 [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.90%
Thornburg Limited Term Municipal Fund - Class C2 | A A 1522 [Member]
Holdings [Line Items]
Percent of Net Asset Value	36%
Thornburg Limited Term Municipal Fund - Class C2 | A 1524 [Member]
Holdings [Line Items]
Percent of Net Asset Value	42.60%
Thornburg Limited Term Municipal Fund - Class C2 | B B B 1526 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.70%
Thornburg Limited Term Municipal Fund - Class C2 | N R 1528 [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.40%
Thornburg Limited Term Municipal Fund - Class C2 | Below Invest Grade 1530 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg Limited Term Municipal Fund - Class C2 | Cash Cash Equivalent 1532 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.30%
Thornburg Limited Term Municipal Fund - Class I | A A A 1541 [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.90%
Thornburg Limited Term Municipal Fund - Class I | A A 1543 [Member]
Holdings [Line Items]
Percent of Net Asset Value	36%
Thornburg Limited Term Municipal Fund - Class I | A 1545 [Member]
Holdings [Line Items]
Percent of Net Asset Value	42.60%
Thornburg Limited Term Municipal Fund - Class I | B B B 1547 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.70%
Thornburg Limited Term Municipal Fund - Class I | N R 1549 [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.40%
Thornburg Limited Term Municipal Fund - Class I | Below Invest Grade 1551 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg Limited Term Municipal Fund - Class I | Cash Cash Equivalent 1553 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.30%
Thornburg Intermediate Municipal Fund - Class A | A A A 1563 [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.80%
Thornburg Intermediate Municipal Fund - Class A | A A 1565 [Member]
Holdings [Line Items]
Percent of Net Asset Value	38.60%
Thornburg Intermediate Municipal Fund - Class A | A 1567 [Member]
Holdings [Line Items]
Percent of Net Asset Value	38.30%
Thornburg Intermediate Municipal Fund - Class A | B B B 1569 [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.40%
Thornburg Intermediate Municipal Fund - Class A | N R 1571 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Thornburg Intermediate Municipal Fund - Class A | Below Invest Grade 1573 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg Intermediate Municipal Fund - Class A | Cash Cash Equivalent 1575 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Thornburg Intermediate Municipal Fund - Class C | A A A 1585 [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.80%
Thornburg Intermediate Municipal Fund - Class C | A A 1587 [Member]
Holdings [Line Items]
Percent of Net Asset Value	38.60%
Thornburg Intermediate Municipal Fund - Class C | A 1589 [Member]
Holdings [Line Items]
Percent of Net Asset Value	38.30%
Thornburg Intermediate Municipal Fund - Class C | B B B 1591 [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.40%
Thornburg Intermediate Municipal Fund - Class C | N R 1593 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Thornburg Intermediate Municipal Fund - Class C | Below Invest Grade 1595 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg Intermediate Municipal Fund - Class C | Cash Cash Equivalent 1597 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Thornburg Intermediate Municipal Fund - Class C2 | A A A 1607 [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.80%
Thornburg Intermediate Municipal Fund - Class C2 | A A 1609 [Member]
Holdings [Line Items]
Percent of Net Asset Value	38.60%
Thornburg Intermediate Municipal Fund - Class C2 | A 1611 [Member]
Holdings [Line Items]
Percent of Net Asset Value	38.30%
Thornburg Intermediate Municipal Fund - Class C2 | B B B 1613 [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.40%
Thornburg Intermediate Municipal Fund - Class C2 | N R 1615 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Thornburg Intermediate Municipal Fund - Class C2 | Below Invest Grade 1617 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg Intermediate Municipal Fund - Class C2 | Cash Cash Equivalent 1619 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Thornburg Intermediate Municipal Fund - Class I | A A A 1628 [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.80%
Thornburg Intermediate Municipal Fund - Class I | A A 1630 [Member]
Holdings [Line Items]
Percent of Net Asset Value	38.60%
Thornburg Intermediate Municipal Fund - Class I | A 1632 [Member]
Holdings [Line Items]
Percent of Net Asset Value	38.30%
Thornburg Intermediate Municipal Fund - Class I | B B B 1634 [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.40%
Thornburg Intermediate Municipal Fund - Class I | N R 1636 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Thornburg Intermediate Municipal Fund - Class I | Below Invest Grade 1638 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg Intermediate Municipal Fund - Class I | Cash Cash Equivalent 1640 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Thornburg Strategic Municipal Income Fund Class A | A A A 1648 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.10%
Thornburg Strategic Municipal Income Fund Class A | A A 1650 [Member]
Holdings [Line Items]
Percent of Net Asset Value	23.50%
Thornburg Strategic Municipal Income Fund Class A | A 1652 [Member]
Holdings [Line Items]
Percent of Net Asset Value	37.10%
Thornburg Strategic Municipal Income Fund Class A | B B B 1654 [Member]
Holdings [Line Items]
Percent of Net Asset Value	17.60%
Thornburg Strategic Municipal Income Fund Class A | N R 1656 [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.20%
Thornburg Strategic Municipal Income Fund Class A | Below Invest Grade 1658 [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.30%
Thornburg Strategic Municipal Income Fund Class A | Cash Cash Equivalent 1660 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Thornburg Strategic Municipal Income Fund Class C | A A A 1668 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.10%
Thornburg Strategic Municipal Income Fund Class C | A A 1670 [Member]
Holdings [Line Items]
Percent of Net Asset Value	23.50%
Thornburg Strategic Municipal Income Fund Class C | A 1672 [Member]
Holdings [Line Items]
Percent of Net Asset Value	37.10%
Thornburg Strategic Municipal Income Fund Class C | B B B 1674 [Member]
Holdings [Line Items]
Percent of Net Asset Value	17.60%
Thornburg Strategic Municipal Income Fund Class C | N R 1676 [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.20%
Thornburg Strategic Municipal Income Fund Class C | Below Invest Grade 1678 [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.30%
Thornburg Strategic Municipal Income Fund Class C | Cash Cash Equivalent 1680 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Thornburg Strategic Municipal Income Fund Class I | A A A 1687 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.10%
Thornburg Strategic Municipal Income Fund Class I | A A 1689 [Member]
Holdings [Line Items]
Percent of Net Asset Value	23.50%
Thornburg Strategic Municipal Income Fund Class I | A 1691 [Member]
Holdings [Line Items]
Percent of Net Asset Value	37.10%
Thornburg Strategic Municipal Income Fund Class I | B B B 1693 [Member]
Holdings [Line Items]
Percent of Net Asset Value	17.60%
Thornburg Strategic Municipal Income Fund Class I | N R 1695 [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.20%
Thornburg Strategic Municipal Income Fund Class I | Below Invest Grade 1697 [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.30%
Thornburg Strategic Municipal Income Fund Class I | Cash Cash Equivalent 1699 [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Thornburg California Limited Term Municipal Fund - Class A | A A A 1709 [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.90%
Thornburg California Limited Term Municipal Fund - Class A | A A 1711 [Member]
Holdings [Line Items]
Percent of Net Asset Value	51.60%
Thornburg California Limited Term Municipal Fund - Class A | A 1713 [Member]
Holdings [Line Items]
Percent of Net Asset Value	24.80%
Thornburg California Limited Term Municipal Fund - Class A | B B B 1715 [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.60%
Thornburg California Limited Term Municipal Fund - Class A | N R 1717 [Member]
Holdings [Line Items]
Percent of Net Asset Value	1%
Thornburg California Limited Term Municipal Fund - Class A | Below Invest Grade 1719 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg California Limited Term Municipal Fund - Class A | Cash Cash Equivalent 1721 [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.10%
Thornburg California Limited Term Municipal Fund - Class C | A A A 1731 [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.90%
Thornburg California Limited Term Municipal Fund - Class C | A A 1733 [Member]
Holdings [Line Items]
Percent of Net Asset Value	51.60%
Thornburg California Limited Term Municipal Fund - Class C | A 1735 [Member]
Holdings [Line Items]
Percent of Net Asset Value	24.80%
Thornburg California Limited Term Municipal Fund - Class C | B B B 1737 [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.60%
Thornburg California Limited Term Municipal Fund - Class C | N R 1739 [Member]
Holdings [Line Items]
Percent of Net Asset Value	1%
Thornburg California Limited Term Municipal Fund - Class C | Below Invest Grade 1741 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg California Limited Term Municipal Fund - Class C | Cash Cash Equivalent 1743 [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.10%
Thornburg California Limited Term Municipal Fund - Class C2 | A A A 1753 [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.90%
Thornburg California Limited Term Municipal Fund - Class C2 | A A 1755 [Member]
Holdings [Line Items]
Percent of Net Asset Value	51.60%
Thornburg California Limited Term Municipal Fund - Class C2 | A 1757 [Member]
Holdings [Line Items]
Percent of Net Asset Value	24.80%
Thornburg California Limited Term Municipal Fund - Class C2 | B B B 1759 [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.60%
Thornburg California Limited Term Municipal Fund - Class C2 | N R 1761 [Member]
Holdings [Line Items]
Percent of Net Asset Value	1%
Thornburg California Limited Term Municipal Fund - Class C2 | Below Invest Grade 1763 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg California Limited Term Municipal Fund - Class C2 | Cash Cash Equivalent 1765 [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.10%
Thornburg California Limited Term Municipal Fund - Class I | A A A 1774 [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.90%
Thornburg California Limited Term Municipal Fund - Class I | A A 1776 [Member]
Holdings [Line Items]
Percent of Net Asset Value	51.60%
Thornburg California Limited Term Municipal Fund - Class I | A 1778 [Member]
Holdings [Line Items]
Percent of Net Asset Value	24.80%
Thornburg California Limited Term Municipal Fund - Class I | B B B 1780 [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.60%
Thornburg California Limited Term Municipal Fund - Class I | N R 1782 [Member]
Holdings [Line Items]
Percent of Net Asset Value	1%
Thornburg California Limited Term Municipal Fund - Class I | Below Invest Grade 1784 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg California Limited Term Municipal Fund - Class I | Cash Cash Equivalent 1786 [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.10%
Thornburg New Mexico Intermediate Municipal Fund - Class A | A A A 1796 [Member]
Holdings [Line Items]
Percent of Net Asset Value	40.60%
Thornburg New Mexico Intermediate Municipal Fund - Class A | A A 1798 [Member]
Holdings [Line Items]
Percent of Net Asset Value	43.50%
Thornburg New Mexico Intermediate Municipal Fund - Class A | A 1800 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.20%
Thornburg New Mexico Intermediate Municipal Fund - Class A | B B B 1802 [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.30%
Thornburg New Mexico Intermediate Municipal Fund - Class A | N R 1804 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.40%
Thornburg New Mexico Intermediate Municipal Fund - Class A | Below Invest Grade 1806 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg New Mexico Intermediate Municipal Fund - Class A | Cash Cash Equivalent 1808 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2%
Thornburg New Mexico Intermediate Municipal Fund - Class D | A A A 1817 [Member]
Holdings [Line Items]
Percent of Net Asset Value	40.60%
Thornburg New Mexico Intermediate Municipal Fund - Class D | A A 1819 [Member]
Holdings [Line Items]
Percent of Net Asset Value	43.50%
Thornburg New Mexico Intermediate Municipal Fund - Class D | A 1821 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.20%
Thornburg New Mexico Intermediate Municipal Fund - Class D | B B B 1823 [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.30%
Thornburg New Mexico Intermediate Municipal Fund - Class D | N R 1825 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.40%
Thornburg New Mexico Intermediate Municipal Fund - Class D | Below Invest Grade 1827 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg New Mexico Intermediate Municipal Fund - Class D | Cash Cash Equivalent 1829 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2%
Thornburg New Mexico Intermediate Municipal Fund - Class I | A A A 1838 [Member]
Holdings [Line Items]
Percent of Net Asset Value	40.60%
Thornburg New Mexico Intermediate Municipal Fund - Class I | A A 1840 [Member]
Holdings [Line Items]
Percent of Net Asset Value	43.50%
Thornburg New Mexico Intermediate Municipal Fund - Class I | A 1842 [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.20%
Thornburg New Mexico Intermediate Municipal Fund - Class I | B B B 1844 [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.30%
Thornburg New Mexico Intermediate Municipal Fund - Class I | N R 1846 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.40%
Thornburg New Mexico Intermediate Municipal Fund - Class I | Below Invest Grade 1848 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg New Mexico Intermediate Municipal Fund - Class I | Cash Cash Equivalent 1850 [Member]
Holdings [Line Items]
Percent of Net Asset Value	2%
Thornburg New York Intermediate Municipal Fund - Class A | A A A 1860 [Member]
Holdings [Line Items]
Percent of Net Asset Value	20.50%
Thornburg New York Intermediate Municipal Fund - Class A | A A 1862 [Member]
Holdings [Line Items]
Percent of Net Asset Value	50%
Thornburg New York Intermediate Municipal Fund - Class A | A 1864 [Member]
Holdings [Line Items]
Percent of Net Asset Value	17.50%
Thornburg New York Intermediate Municipal Fund - Class A | B B B 1866 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4%
Thornburg New York Intermediate Municipal Fund - Class A | N R 1868 [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.40%
Thornburg New York Intermediate Municipal Fund - Class A | Below Invest Grade 1870 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg New York Intermediate Municipal Fund - Class A | Cash Cash Equivalent 1872 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.70%
Thornburg New York Intermediate Municipal Fund - Class I | A A A 1881 [Member]
Holdings [Line Items]
Percent of Net Asset Value	20.50%
Thornburg New York Intermediate Municipal Fund - Class I | A A 1883 [Member]
Holdings [Line Items]
Percent of Net Asset Value	50%
Thornburg New York Intermediate Municipal Fund - Class I | A 1885 [Member]
Holdings [Line Items]
Percent of Net Asset Value	17.50%
Thornburg New York Intermediate Municipal Fund - Class I | B B B 1887 [Member]
Holdings [Line Items]
Percent of Net Asset Value	4%
Thornburg New York Intermediate Municipal Fund - Class I | N R 1889 [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.40%
Thornburg New York Intermediate Municipal Fund - Class I | Below Invest Grade 1891 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0%
Thornburg New York Intermediate Municipal Fund - Class I | Cash Cash Equivalent 1893 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.70%
Thornburg Emerging Markets Managed Account Fund - Class I | Small Cap 1900 [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.20%
Thornburg Emerging Markets Managed Account Fund - Class I | Mid Cap 1902 [Member]
Holdings [Line Items]
Percent of Net Asset Value	40.40%
Thornburg Emerging Markets Managed Account Fund - Class I | Large Cap 1904 [Member]
Holdings [Line Items]
Percent of Net Asset Value	49.40%
Thornburg Municipal Managed Account Fund - Class I | A A A 1911 [Member]
Holdings [Line Items]
Percent of Net Asset Value	15.10%
Thornburg Municipal Managed Account Fund - Class I | A A 1913 [Member]
Holdings [Line Items]
Percent of Net Asset Value	17.60%
Thornburg Municipal Managed Account Fund - Class I | A 1915 [Member]
Holdings [Line Items]
Percent of Net Asset Value	30.90%
Thornburg Municipal Managed Account Fund - Class I | B B B 1917 [Member]
Holdings [Line Items]
Percent of Net Asset Value	21.80%
Thornburg Municipal Managed Account Fund - Class I | N R 1919 [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.90%
Thornburg Municipal Managed Account Fund - Class I | Below Invest Grade 1921 [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.90%
Thornburg Municipal Managed Account Fund - Class I | Cash Cash Equivalent 1923 [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.70%
C 000161463 [Member] | Commercial Paper 1932 [Member]
Holdings [Line Items]
Percent of Net Asset Value	59.60%
C 000161463 [Member] | Mutual Fund 1934 [Member]
Holdings [Line Items]
Percent of Net Asset Value	33.70%
C 000161463 [Member] | Other Assets Less Liabilities 1936 [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.70%