v3.25.4
Investment Objectives and Goals
Feb. 28, 2026
PRIMECAP Odyssey Stock Fund Series  
Prospectus [Line Items]  
Risk/Return [Heading] PRIMECAP Odyssey Stock Fund
Objective [Heading] Investment Objective
Objective, Primary [Text Block]
The PRIMECAP Odyssey Stock Fund seeks to provide long-term capital appreciation.
PRIMECAP Odyssey Growth Fund Series  
Prospectus [Line Items]  
Risk/Return [Heading] PRIMECAP Odyssey Growth Fund
Objective [Heading] Investment Objective
Objective, Primary [Text Block]
The PRIMECAP Odyssey Growth Fund seeks to provide long-term capital appreciation.
PRIMECAP Odyssey Aggressive Growth Fund Series  
Prospectus [Line Items]  
Risk/Return [Heading] PRIMECAP Odyssey Aggressive Growth Fund
Objective [Heading] Investment Objective
Objective, Primary [Text Block]
The PRIMECAP Odyssey Aggressive Growth Fund seeks to provide long-term capital appreciation.