v3.26.1
Investment Objectives and Goals - Gateway Trust - Classes A, C, N, and Y
Dec. 31, 2025
Gateway Equity Call Premium Fund  
Prospectus [Line Items]  
Risk/Return [Heading] Gateway Equity Call Premium Fund
Objective [Heading] Investment Goal
Objective, Primary [Text Block]
The Fund seeks total return with less risk than U.S. equity markets.
Gateway Fund  
Prospectus [Line Items]  
Risk/Return [Heading] Gateway Fund
Objective [Heading] Investment Goal
Objective, Primary [Text Block]
The Fund seeks to capture the majority of the returns associated with equity market investments, while exposing investors to less risk than other equity investments.