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Investment Strategy
Mar. 01, 2026
Global Emerging Markets Fund  
Prospectus [Line Items]  
Strategy [Heading] On or about July 1, 2026, subject to shareholder approval, under Principal Investment Strategies, add the following after the third paragraph:
Strategy Narrative [Text Block]
The Fund is considered non-diversified, which means it can invest a higher percentage of assets in securities of individual issuers than a diversified fund. As a result, changes in the value of a single investment could cause greater fluctuations in the Fund's share price than would occur in a more diversified fund.
Principal Capital Appreciation Fund  
Prospectus [Line Items]  
Strategy [Heading] On or about July 1, 2026, subject to shareholder approval, under Principal Investment Strategies, add the following after the first paragraph:
Strategy Narrative [Text Block]
The Fund is considered non-diversified, which means it can invest a higher percentage of assets in securities of individual issuers than a diversified fund. As a result, changes in the value of a single investment could cause greater fluctuations in the Fund's share price than would occur in a more diversified fund.