v3.26.3
Shareholder Report, Holdings (Details)
Aug. 31, 2026
Thornburg Core Plus Bond ETF | U.S. Government [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.90% [1]
Thornburg Core Plus Bond ETF | AAA [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.10% [1]
Thornburg Core Plus Bond ETF | AA [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30% [1]
Thornburg Core Plus Bond ETF | A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.40% [1]
Thornburg Core Plus Bond ETF | BBB [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 21.00% [1]
Thornburg Core Plus Bond ETF | Below Invest. Grade [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00% [1]
Thornburg Core Plus Bond ETF | NR [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [1]
Thornburg Core Plus Bond ETF | Cash Equivalents & Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [1]
Thornburg International Equity ETF | Small Cap (less than $2.5 B) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Thornburg International Equity ETF | Mid Cap ($2.5-12 B) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Thornburg International Equity ETF | Large Cap (greater than $12 B) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
Thornburg International Growth ETF | Small Cap (less than $2.5 B) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
Thornburg International Growth ETF | Mid Cap ($2.5-12 B) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
Thornburg International Growth ETF | Large Cap (greater than $12 B) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 91.30%
Thornburg Multi Sector Bond ETF | U.S. Government [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 30.60% [2]
Thornburg Multi Sector Bond ETF | AAA [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.40% [2]
Thornburg Multi Sector Bond ETF | AA [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [2]
Thornburg Multi Sector Bond ETF | A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.70% [2]
Thornburg Multi Sector Bond ETF | BBB [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.50% [2]
Thornburg Multi Sector Bond ETF | Below Invest. Grade [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.20% [2]
Thornburg Multi Sector Bond ETF | NR [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70% [2]
Thornburg Multi Sector Bond ETF | Cash Equivalents & Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [2]
Thornburg Premium Income Builder ETF | Small Cap (less than $2.5 B) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Thornburg Premium Income Builder ETF | Mid Cap ($2.5-12 B) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Thornburg Premium Income Builder ETF | Large Cap (greater than $12 B) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 95.80%
[1] 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)
[2] 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)