Expense Example	Mar. 27, 2026 USD ($)
Thornburg American Opportunities Fund - ETF Class
Prospectus [Line Items]
Expense Example, with Redemption, 1 Year	$ 81
Expense Example, with Redemption, 3 Years	282
Expense Example, with Redemption, 5 Years	501
Expense Example, with Redemption, 10 Years	1,130
Thornburg Focus Growth Fund - ETF Class
Prospectus [Line Items]
Expense Example, with Redemption, 1 Year	81
Expense Example, with Redemption, 3 Years	293
Expense Example, with Redemption, 5 Years	523
Expense Example, with Redemption, 10 Years	$ 1,184

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 3
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 3
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 3
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 1
-Subsection a