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Investment Risks - Risk Nondiversified Status [Member]
Mar. 01, 2026
Global Emerging Markets Fund  
Prospectus [Line Items]  
Risk [Text Block]
Non-Diversification Risk. A non-diversified fund may invest a high percentage of its assets in the securities of a small number of issuers and is more likely than diversified funds to be significantly affected by a specific security’s poor performance.
Principal Capital Appreciation Fund  
Prospectus [Line Items]  
Risk [Text Block]
Non-Diversification Risk. A non-diversified fund may invest a high percentage of its assets in the securities of a small number of issuers and is more likely than diversified funds to be significantly affected by a specific security’s poor performance.