S000006645 [Member] Investment Objectives and Goals - Loomis Sayles Intermediate Duration Bond Fund

Sep. 30, 2025

Prospectus [Line Items]

Risk/Return [Heading]

Loomis Sayles Intermediate Duration Bond Fund

Objective [Heading]

Investment Goal

Objective, Primary [Text Block]

The Fund’s investment objective is above-average total return through a combination of current income and capital appreciation.