v3.25.4
Expense Example, No Redemption
Jan. 28, 2026
USD ($)
Thornburg Global Opportunities Fund - Class C  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year $ 219
Expense Example, No Redemption, 3 Years 676
Expense Example, No Redemption, 5 Years 1,159
Expense Example, No Redemption, 10 Years 2,493
Thornburg International Equity Fund - Class C  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 193
Expense Example, No Redemption, 3 Years 647
Expense Example, No Redemption, 5 Years 1,127
Expense Example, No Redemption, 10 Years 2,454
Thornburg Better World International Fund - Class C  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 198
Expense Example, No Redemption, 3 Years 751
Expense Example, No Redemption, 5 Years 1,330
Expense Example, No Redemption, 10 Years 2,904
Thornburg International Growth Fund - Class C  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 241
Expense Example, No Redemption, 3 Years 786
Expense Example, No Redemption, 5 Years 1,357
Expense Example, No Redemption, 10 Years 2,909
Thornburg Developing World Fund Class C  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 236
Expense Example, No Redemption, 3 Years 805
Expense Example, No Redemption, 5 Years 1,401
Expense Example, No Redemption, 10 Years 3,014
Thornburg Investment Income Builder Fund - Class C  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 193
Expense Example, No Redemption, 3 Years 597
Expense Example, No Redemption, 5 Years 1,026
Expense Example, No Redemption, 10 Years 2,222
Thornburg Limited Term U.S. Government Fund - Class C  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 119
Expense Example, No Redemption, 3 Years 543
Expense Example, No Redemption, 5 Years 993
Expense Example, No Redemption, 10 Years 2,241
Thornburg Limited Term U.S. Government Fund - Class C2  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 134
Expense Example, No Redemption, 3 Years 875
Expense Example, No Redemption, 5 Years 1,638
Expense Example, No Redemption, 10 Years 3,646
Thornburg Limited Term Income Fund - Class C  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 101
Expense Example, No Redemption, 3 Years 320
Expense Example, No Redemption, 5 Years 556
Expense Example, No Redemption, 10 Years 1,234
Thornburg Limited Term Income Fund - Class C2  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 116
Expense Example, No Redemption, 3 Years 437
Expense Example, No Redemption, 5 Years 780
Expense Example, No Redemption, 10 Years 1,750
Thornburg Core Plus Bond Fund - Class C  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 153
Expense Example, No Redemption, 3 Years 910
Expense Example, No Redemption, 5 Years 1,689
Expense Example, No Redemption, 10 Years 3,733
Thornburg Strategic Income Fund - Class C  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 177
Expense Example, No Redemption, 3 Years 548
Expense Example, No Redemption, 5 Years 944
Expense Example, No Redemption, 10 Years 2,052
Thornburg Limited Term Municipal Fund - Class C  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 110
Expense Example, No Redemption, 3 Years 343
Expense Example, No Redemption, 5 Years 595
Expense Example, No Redemption, 10 Years 1,317
Thornburg Limited Term Municipal Fund - Class C2  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 134
Expense Example, No Redemption, 3 Years 528
Expense Example, No Redemption, 5 Years 947
Expense Example, No Redemption, 10 Years 2,116
Thornburg Intermediate Municipal Fund - Class C  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 110
Expense Example, No Redemption, 3 Years 416
Expense Example, No Redemption, 5 Years 744
Expense Example, No Redemption, 10 Years 1,673
Thornburg Intermediate Municipal Fund - Class C2  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 115
Expense Example, No Redemption, 3 Years 581
Expense Example, No Redemption, 5 Years 1,073
Expense Example, No Redemption, 10 Years 2,431
Thornburg Strategic Municipal Income Fund Class C  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 112
Expense Example, No Redemption, 3 Years 565
Expense Example, No Redemption, 5 Years 1,045
Expense Example, No Redemption, 10 Years 2,371
Thornburg California Limited Term Municipal Fund - Class C  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 101
Expense Example, No Redemption, 3 Years 599
Expense Example, No Redemption, 5 Years 1,123
Expense Example, No Redemption, 10 Years 2,563
Thornburg California Limited Term Municipal Fund - Class C2  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 116
Expense Example, No Redemption, 3 Years 527
Expense Example, No Redemption, 5 Years 964
Expense Example, No Redemption, 10 Years $ 2,180