v3.26.1
Expense Example, No Redemption - Natixis Funds Trust II - Classs C
Dec. 31, 2025
USD ($)
Loomis Sayles Strategic Alpha Fund  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year $ 176
Expense Example, No Redemption, 3 Years 555
Expense Example, No Redemption, 5 Years 960
Expense Example, No Redemption, 10 Years 1,893
Natixis Oakmark Fund  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 181
Expense Example, No Redemption, 3 Years 567
Expense Example, No Redemption, 5 Years 977
Expense Example, No Redemption, 10 Years 1,927
Vaughan Nelson Mid Cap Fund  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 193
Expense Example, No Redemption, 3 Years 622
Expense Example, No Redemption, 5 Years 1,077
Expense Example, No Redemption, 10 Years $ 2,145