v3.25.4
Expense Example
Jan. 28, 2026
USD ($)
Thornburg Global Opportunities Fund - Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 579
Expense Example, with Redemption, 3 Years 852
Expense Example, with Redemption, 5 Years 1,146
Expense Example, with Redemption, 10 Years 1,979
Thornburg Global Opportunities Fund - Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 319
Expense Example, with Redemption, 3 Years 676
Expense Example, with Redemption, 5 Years 1,159
Expense Example, with Redemption, 10 Years 2,493
Thornburg Global Opportunities Fund - Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 101
Expense Example, with Redemption, 3 Years 332
Expense Example, with Redemption, 5 Years 582
Expense Example, with Redemption, 10 Years 1,298
Thornburg Global Opportunities Fund - Class R6  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 91
Expense Example, with Redemption, 3 Years 307
Expense Example, with Redemption, 5 Years 542
Expense Example, with Redemption, 10 Years 1,215
Thornburg International Equity Fund - Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 562
Expense Example, with Redemption, 3 Years 817
Expense Example, with Redemption, 5 Years 1,092
Expense Example, with Redemption, 10 Years 1,875
Thornburg International Equity Fund - Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 293
Expense Example, with Redemption, 3 Years 647
Expense Example, with Redemption, 5 Years 1,127
Expense Example, with Redemption, 10 Years 2,454
Thornburg International Equity Fund - Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 92
Expense Example, with Redemption, 3 Years 300
Expense Example, with Redemption, 5 Years 525
Expense Example, with Redemption, 10 Years 1,173
Thornburg International Equity Fund - Class R6  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 74
Expense Example, with Redemption, 3 Years 265
Expense Example, with Redemption, 5 Years 472
Expense Example, with Redemption, 10 Years 1,070
Thornburg Better World International Fund - Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 588
Expense Example, with Redemption, 3 Years 907
Expense Example, with Redemption, 5 Years 1,249
Expense Example, with Redemption, 10 Years 2,212
Thornburg Better World International Fund - Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 298
Expense Example, with Redemption, 3 Years 751
Expense Example, with Redemption, 5 Years 1,330
Expense Example, with Redemption, 10 Years 2,904
Thornburg Better World International Fund - Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 92
Expense Example, with Redemption, 3 Years 360
Expense Example, with Redemption, 5 Years 648
Expense Example, with Redemption, 10 Years 1,470
Thornburg International Growth Fund - Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 586
Expense Example, with Redemption, 3 Years 873
Expense Example, with Redemption, 5 Years 1,181
Expense Example, with Redemption, 10 Years 2,054
Thornburg International Growth Fund - Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 341
Expense Example, with Redemption, 3 Years 786
Expense Example, with Redemption, 5 Years 1,357
Expense Example, with Redemption, 10 Years 2,909
Thornburg International Growth Fund - Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 101
Expense Example, with Redemption, 3 Years 339
Expense Example, with Redemption, 5 Years 596
Expense Example, with Redemption, 10 Years 1,330
Thornburg International Growth Fund - Class R6  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 93
Expense Example, with Redemption, 3 Years 318
Expense Example, with Redemption, 5 Years 561
Expense Example, with Redemption, 10 Years 1,259
Thornburg Developing World Fund Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 591
Expense Example, with Redemption, 3 Years 920
Expense Example, with Redemption, 5 Years 1,272
Expense Example, with Redemption, 10 Years 2,262
Thornburg Developing World Fund Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 336
Expense Example, with Redemption, 3 Years 805
Expense Example, with Redemption, 5 Years 1,401
Expense Example, with Redemption, 10 Years 3,014
Thornburg Developing World Fund Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 106
Expense Example, with Redemption, 3 Years 395
Expense Example, with Redemption, 5 Years 705
Expense Example, with Redemption, 10 Years 1,587
Thornburg Developing World Fund Class R6  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 96
Expense Example, with Redemption, 3 Years 370
Expense Example, with Redemption, 5 Years 665
Expense Example, with Redemption, 10 Years 1,505
Thornburg Investment Income Builder Fund - Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 562
Expense Example, with Redemption, 3 Years 799
Expense Example, with Redemption, 5 Years 1,054
Expense Example, with Redemption, 10 Years 1,785
Thornburg Investment Income Builder Fund - Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 293
Expense Example, with Redemption, 3 Years 597
Expense Example, with Redemption, 5 Years 1,026
Expense Example, with Redemption, 10 Years 2,222
Thornburg Investment Income Builder Fund - Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 93
Expense Example, with Redemption, 3 Years 290
Expense Example, with Redemption, 5 Years 504
Expense Example, with Redemption, 10 Years 1,120
Thornburg Investment Income Builder Fund - Class R6  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 85
Expense Example, with Redemption, 3 Years 269
Expense Example, with Redemption, 5 Years 469
Expense Example, with Redemption, 10 Years 1,047
Thornburg Summit Fund - Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 543
Expense Example, with Redemption, 3 Years 918
Expense Example, with Redemption, 5 Years 1,317
Expense Example, with Redemption, 10 Years 2,432
Thornburg Summit Fund - Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 72
Expense Example, with Redemption, 3 Years 334
Expense Example, with Redemption, 5 Years 616
Expense Example, with Redemption, 10 Years 1,421
Thornburg Ultra Short Income Fund Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 285
Expense Example, with Redemption, 3 Years 468
Expense Example, with Redemption, 5 Years 666
Expense Example, with Redemption, 10 Years 1,238
Thornburg Ultra Short Income Fund Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 36
Expense Example, with Redemption, 3 Years 154
Expense Example, with Redemption, 5 Years 283
Expense Example, with Redemption, 10 Years 659
Thornburg Limited Term U.S. Government Fund - Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 317
Expense Example, with Redemption, 3 Years 539
Expense Example, with Redemption, 5 Years 779
Expense Example, with Redemption, 10 Years 1,467
Thornburg Limited Term U.S. Government Fund - Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 169
Expense Example, with Redemption, 3 Years 543
Expense Example, with Redemption, 5 Years 993
Expense Example, with Redemption, 10 Years 2,241
Thornburg Limited Term U.S. Government Fund - Class C2  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 199
Expense Example, with Redemption, 3 Years 875
Expense Example, with Redemption, 5 Years 1,638
Expense Example, with Redemption, 10 Years 3,646
Thornburg Limited Term U.S. Government Fund - Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 68
Expense Example, with Redemption, 3 Years 221
Expense Example, with Redemption, 5 Years 387
Expense Example, with Redemption, 10 Years 868
Thornburg Limited Term Income Fund - Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 302
Expense Example, with Redemption, 3 Years 465
Expense Example, with Redemption, 5 Years 643
Expense Example, with Redemption, 10 Years 1,158
Thornburg Limited Term Income Fund - Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 151
Expense Example, with Redemption, 3 Years 320
Expense Example, with Redemption, 5 Years 556
Expense Example, with Redemption, 10 Years 1,234
Thornburg Limited Term Income Fund - Class C2  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 181
Expense Example, with Redemption, 3 Years 437
Expense Example, with Redemption, 5 Years 780
Expense Example, with Redemption, 10 Years 1,750
Thornburg Limited Term Income Fund - Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 50
Expense Example, with Redemption, 3 Years 166
Expense Example, with Redemption, 5 Years 292
Expense Example, with Redemption, 10 Years 661
Thornburg Limited Term Income Fund - Class R6  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 43
Expense Example, with Redemption, 3 Years 146
Expense Example, with Redemption, 5 Years 258
Expense Example, with Redemption, 10 Years 587
Thornburg Core Plus Bond Fund - Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 523
Expense Example, with Redemption, 3 Years 3,436
Expense Example, with Redemption, 5 Years 5,719
Expense Example, with Redemption, 10 Years 9,496
Thornburg Core Plus Bond Fund - Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 253
Expense Example, with Redemption, 3 Years 910
Expense Example, with Redemption, 5 Years 1,689
Expense Example, with Redemption, 10 Years 3,733
Thornburg Core Plus Bond Fund - Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 51
Expense Example, with Redemption, 3 Years 234
Expense Example, with Redemption, 5 Years 433
Expense Example, with Redemption, 10 Years 1,006
Thornburg Core Plus Bond Fund - Class R6  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 51
Expense Example, with Redemption, 3 Years 1,169
Expense Example, with Redemption, 5 Years 2,279
Expense Example, with Redemption, 10 Years 5,018
Thornburg Strategic Income Fund - Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 549
Expense Example, with Redemption, 3 Years 760
Expense Example, with Redemption, 5 Years 988
Expense Example, with Redemption, 10 Years 1,642
Thornburg Strategic Income Fund - Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 277
Expense Example, with Redemption, 3 Years 548
Expense Example, with Redemption, 5 Years 944
Expense Example, with Redemption, 10 Years 2,052
Thornburg Strategic Income Fund - Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 61
Expense Example, with Redemption, 3 Years 220
Expense Example, with Redemption, 5 Years 393
Expense Example, with Redemption, 10 Years 894
Thornburg Strategic Income Fund - Class R6  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 54
Expense Example, with Redemption, 3 Years 202
Expense Example, with Redemption, 5 Years 364
Expense Example, with Redemption, 10 Years 832
Thornburg Short Duration Municipal Fund Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 295
Expense Example, with Redemption, 3 Years 559
Expense Example, with Redemption, 5 Years 844
Expense Example, with Redemption, 10 Years 1,655
Thornburg Short Duration Municipal Fund Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 51
Expense Example, with Redemption, 3 Years 191
Expense Example, with Redemption, 5 Years 343
Expense Example, with Redemption, 10 Years 785
Thornburg Limited Term Municipal Fund - Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 303
Expense Example, with Redemption, 3 Years 469
Expense Example, with Redemption, 5 Years 649
Expense Example, with Redemption, 10 Years 1,169
Thornburg Limited Term Municipal Fund - Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 160
Expense Example, with Redemption, 3 Years 343
Expense Example, with Redemption, 5 Years 595
Expense Example, with Redemption, 10 Years 1,317
Thornburg Limited Term Municipal Fund - Class C2  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 199
Expense Example, with Redemption, 3 Years 528
Expense Example, with Redemption, 5 Years 947
Expense Example, with Redemption, 10 Years 2,116
Thornburg Limited Term Municipal Fund - Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 54
Expense Example, with Redemption, 3 Years 170
Expense Example, with Redemption, 5 Years 296
Expense Example, with Redemption, 10 Years 665
Thornburg Intermediate Municipal Fund - Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 273
Expense Example, with Redemption, 3 Years 469
Expense Example, with Redemption, 5 Years 681
Expense Example, with Redemption, 10 Years 1,292
Thornburg Intermediate Municipal Fund - Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 170
Expense Example, with Redemption, 3 Years 416
Expense Example, with Redemption, 5 Years 744
Expense Example, with Redemption, 10 Years 1,673
Thornburg Intermediate Municipal Fund - Class C2  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 180
Expense Example, with Redemption, 3 Years 581
Expense Example, with Redemption, 5 Years 1,073
Expense Example, with Redemption, 10 Years 2,431
Thornburg Intermediate Municipal Fund - Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 49
Expense Example, with Redemption, 3 Years 193
Expense Example, with Redemption, 5 Years 350
Expense Example, with Redemption, 10 Years 805
Thornburg Strategic Municipal Income Fund Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 275
Expense Example, with Redemption, 3 Years 536
Expense Example, with Redemption, 5 Years 817
Expense Example, with Redemption, 10 Years 1,617
Thornburg Strategic Municipal Income Fund Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 172
Expense Example, with Redemption, 3 Years 565
Expense Example, with Redemption, 5 Years 1,045
Expense Example, with Redemption, 10 Years 2,371
Thornburg Strategic Municipal Income Fund Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 51
Expense Example, with Redemption, 3 Years 266
Expense Example, with Redemption, 5 Years 499
Expense Example, with Redemption, 10 Years 1,168
Thornburg California Limited Term Municipal Fund - Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 299
Expense Example, with Redemption, 3 Years 503
Expense Example, with Redemption, 5 Years 723
Expense Example, with Redemption, 10 Years 1,357
Thornburg California Limited Term Municipal Fund - Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 151
Expense Example, with Redemption, 3 Years 599
Expense Example, with Redemption, 5 Years 1,123
Expense Example, with Redemption, 10 Years 2,563
Thornburg California Limited Term Municipal Fund - Class C2  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 181
Expense Example, with Redemption, 3 Years 527
Expense Example, with Redemption, 5 Years 964
Expense Example, with Redemption, 10 Years 2,180
Thornburg California Limited Term Municipal Fund - Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 50
Expense Example, with Redemption, 3 Years 209
Expense Example, with Redemption, 5 Years 382
Expense Example, with Redemption, 10 Years 884
Thornburg New Mexico Intermediate Municipal Fund - Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 292
Expense Example, with Redemption, 3 Years 523
Expense Example, with Redemption, 5 Years 773
Expense Example, with Redemption, 10 Years 1,487
Thornburg New Mexico Intermediate Municipal Fund - Class D  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 119
Expense Example, with Redemption, 3 Years 429
Expense Example, with Redemption, 5 Years 761
Expense Example, with Redemption, 10 Years 1,701
Thornburg New Mexico Intermediate Municipal Fund - Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 68
Expense Example, with Redemption, 3 Years 238
Expense Example, with Redemption, 5 Years 422
Expense Example, with Redemption, 10 Years 956
Thornburg New York Intermediate Municipal Fund - Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 292
Expense Example, with Redemption, 3 Years 603
Expense Example, with Redemption, 5 Years 935
Expense Example, with Redemption, 10 Years 1,876
Thornburg New York Intermediate Municipal Fund - Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 68
Expense Example, with Redemption, 3 Years 328
Expense Example, with Redemption, 5 Years 609
Expense Example, with Redemption, 10 Years 1,408
Thornburg Global Opportunities Fund - Class R3  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 152
Expense Example, with Redemption, 3 Years 666
Expense Example, with Redemption, 5 Years 1,206
Expense Example, with Redemption, 10 Years 2,686
Thornburg Global Opportunities Fund - Class R4  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 126
Expense Example, with Redemption, 3 Years 556
Expense Example, with Redemption, 5 Years 1,012
Expense Example, with Redemption, 10 Years 2,276
Thornburg Global Opportunities Fund - Class R5  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 101
Expense Example, with Redemption, 3 Years 384
Expense Example, with Redemption, 5 Years 688
Expense Example, with Redemption, 10 Years 1,551
Thornburg International Equity Fund - Class R3  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 143
Expense Example, with Redemption, 3 Years 492
Expense Example, with Redemption, 5 Years 865
Expense Example, with Redemption, 10 Years 1,914
Thornburg International Equity Fund - Class R4  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 117
Expense Example, with Redemption, 3 Years 423
Expense Example, with Redemption, 5 Years 751
Expense Example, with Redemption, 10 Years 1,679
Thornburg International Equity Fund - Class R5  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 92
Expense Example, with Redemption, 3 Years 345
Expense Example, with Redemption, 5 Years 618
Expense Example, with Redemption, 10 Years 1,396
Thornburg International Growth Fund - Class R3  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 152
Expense Example, with Redemption, 3 Years 653
Expense Example, with Redemption, 5 Years 1,182
Expense Example, with Redemption, 10 Years 2,629
Thornburg International Growth Fund - Class R4  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 126
Expense Example, with Redemption, 3 Years 579
Expense Example, with Redemption, 5 Years 1,058
Expense Example, with Redemption, 10 Years 2,382
Thornburg International Growth Fund - Class R5  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 101
Expense Example, with Redemption, 3 Years 479
Expense Example, with Redemption, 5 Years 882
Expense Example, with Redemption, 10 Years 2,009
Thornburg Developing World Fund Class R5  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 106
Expense Example, with Redemption, 3 Years 551
Expense Example, with Redemption, 5 Years 1,023
Expense Example, with Redemption, 10 Years 2,328
Thornburg Investment Income Builder Fund - Class R3  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 155
Expense Example, with Redemption, 3 Years 493
Expense Example, with Redemption, 5 Years 855
Expense Example, with Redemption, 10 Years 1,873
Thornburg Investment Income Builder Fund - Class R4  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 129
Expense Example, with Redemption, 3 Years 435
Expense Example, with Redemption, 5 Years 762
Expense Example, with Redemption, 10 Years 1,689
Thornburg Investment Income Builder Fund - Class R5  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 104
Expense Example, with Redemption, 3 Years 340
Expense Example, with Redemption, 5 Years 594
Expense Example, with Redemption, 10 Years 1,322
Thornburg Limited Term U.S. Government Fund - Class R3  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 119
Expense Example, with Redemption, 3 Years 532
Expense Example, with Redemption, 5 Years 971
Expense Example, with Redemption, 10 Years 2,192
Thornburg Limited Term U.S. Government Fund - Class R4  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 94
Expense Example, with Redemption, 3 Years 584
Expense Example, with Redemption, 5 Years 1,100
Expense Example, with Redemption, 10 Years 2,519
Thornburg Limited Term U.S. Government Fund - Class R5  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 68
Expense Example, with Redemption, 3 Years 522
Expense Example, with Redemption, 5 Years 1,001
Expense Example, with Redemption, 10 Years 2,327
Thornburg Limited Term Income Fund - Class R3  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 101
Expense Example, with Redemption, 3 Years 337
Expense Example, with Redemption, 5 Years 591
Expense Example, with Redemption, 10 Years 1,320
Thornburg Limited Term Income Fund - Class R4  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 76
Expense Example, with Redemption, 3 Years 316
Expense Example, with Redemption, 5 Years 576
Expense Example, with Redemption, 10 Years 1,319
Thornburg Limited Term Income Fund - Class R5  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 50
Expense Example, with Redemption, 3 Years 205
Expense Example, with Redemption, 5 Years 373
Expense Example, with Redemption, 10 Years 862
Thornburg Strategic Income Fund - Class R3  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 127
Expense Example, with Redemption, 3 Years 738
Expense Example, with Redemption, 5 Years 1,374
Expense Example, with Redemption, 10 Years 3,087
Thornburg Strategic Income Fund - Class R4  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 127
Expense Example, with Redemption, 3 Years 615
Expense Example, with Redemption, 5 Years 1,130
Expense Example, with Redemption, 10 Years 2,545
Thornburg Strategic Income Fund - Class R5  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 61
Expense Example, with Redemption, 3 Years 246
Expense Example, with Redemption, 5 Years 447
Expense Example, with Redemption, 10 Years 1,026
Thornburg Emerging Markets Managed Account Fund - Class SMA  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 0
Expense Example, with Redemption, 3 Years 0
Expense Example, with Redemption, 5 Years 0
Expense Example, with Redemption, 10 Years 0
Thornburg High Income Bond Managed Account Fund - Class SMA  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 0
Expense Example, with Redemption, 3 Years 0
Expense Example, with Redemption, 5 Years 0
Expense Example, with Redemption, 10 Years 0
Thornburg Investment Grade Bond Managed Account Fund - Class SMA  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 0
Expense Example, with Redemption, 3 Years 0
Expense Example, with Redemption, 5 Years 0
Expense Example, with Redemption, 10 Years 0
Thornburg Municipal Managed Account Fund - Class SMA  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 0
Expense Example, with Redemption, 3 Years 0
Expense Example, with Redemption, 5 Years 0
Expense Example, with Redemption, 10 Years $ 0