v3.26.1
Expense Example - Natixis Funds Trust II
Dec. 31, 2025
USD ($)
Loomis Sayles Strategic Alpha Fund | Classs A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 521
Expense Example, with Redemption, 3 Years 734
Expense Example, with Redemption, 5 Years 965
Expense Example, with Redemption, 10 Years 1,627
Loomis Sayles Strategic Alpha Fund | Classs C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 276
Expense Example, with Redemption, 3 Years 555
Expense Example, with Redemption, 5 Years 960
Expense Example, with Redemption, 10 Years 1,893
Loomis Sayles Strategic Alpha Fund | Classs N  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 69
Expense Example, with Redemption, 3 Years 224
Expense Example, with Redemption, 5 Years 392
Expense Example, with Redemption, 10 Years 880
Loomis Sayles Strategic Alpha Fund | Classs Y  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 75
Expense Example, with Redemption, 3 Years 244
Expense Example, with Redemption, 5 Years 428
Expense Example, with Redemption, 10 Years 961
Natixis Oakmark Fund | Classs A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 674
Expense Example, with Redemption, 3 Years 890
Expense Example, with Redemption, 5 Years 1,123
Expense Example, with Redemption, 10 Years 1,792
Natixis Oakmark Fund | Classs C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 281
Expense Example, with Redemption, 3 Years 567
Expense Example, with Redemption, 5 Years 977
Expense Example, with Redemption, 10 Years 1,927
Natixis Oakmark Fund | Classs N  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 75
Expense Example, with Redemption, 3 Years 246
Expense Example, with Redemption, 5 Years 433
Expense Example, with Redemption, 10 Years 972
Natixis Oakmark Fund | Classs Y  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 80
Expense Example, with Redemption, 3 Years 256
Expense Example, with Redemption, 5 Years 447
Expense Example, with Redemption, 10 Years 999
Vaughan Nelson Mid Cap Fund | Classs A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 685
Expense Example, with Redemption, 3 Years 943
Expense Example, with Redemption, 5 Years 1,221
Expense Example, with Redemption, 10 Years 2,011
Vaughan Nelson Mid Cap Fund | Classs C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 293
Expense Example, with Redemption, 3 Years 622
Expense Example, with Redemption, 5 Years 1,077
Expense Example, with Redemption, 10 Years 2,145
Vaughan Nelson Mid Cap Fund | Classs Y  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 92
Expense Example, with Redemption, 3 Years 313
Expense Example, with Redemption, 5 Years 552
Expense Example, with Redemption, 10 Years 1,237
Vaughan Nelson Mid Cap Fund | Classs N  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 87
Expense Example, with Redemption, 3 Years 286
Expense Example, with Redemption, 5 Years 502
Expense Example, with Redemption, 10 Years $ 1,125