Investors [Member] Investment Risks - Investor - Harding Loevner International Equity Portfolio |
Oct. 31, 2025 |
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| Currency Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Currency Risk. Foreign currencies may experience steady or sudden devaluation relative to the U.S. dollar, adversely affecting the value of the Portfolio’s investments. Because the Portfolio’s net asset value is determined on the basis of U.S. dollars, if the local currency of a foreign market depreciates against the U.S. dollar, you may lose money even if the foreign market prices of the Portfolio’s holdings rise.
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| Foreign Investment Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Foreign Investment Risk. Securities issued by foreign entities involve risks not associated with U.S. investments. These risks include additional taxation, political, economic, social, geopolitical or diplomatic instability, and the above-mentioned possibility of changes in foreign currency exchange rates. There may also be less publicly-available information about a foreign issuer. Such risks may be magnified with respect to securities of issuers in frontier emerging markets.
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| Emerging and Frontier Market Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Emerging and Frontier Market Risk. Emerging and frontier market securities involve certain risks, such as exposure to economies less diverse and mature than that of the United States or more established foreign markets. Economic or political instability may cause larger price changes in emerging or frontier market securities than in securities of issuers based in more developed foreign countries. The smaller size and lower levels of liquidity in emerging markets, as well as other factors, contribute to greater volatility. Because of this volatility, this Portfolio is better suited for long-term investors.
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| NAV Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | NAV Risk. The net asset value of the Portfolio and the value of your investment will fluctuate.
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| Depositary Receipts Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Depositary Receipts Risk. ADRs as well as other forms of depositary receipts, including EDRs and GDRs, are certificates evidencing ownership of shares of a foreign issuer. These certificates are issued by depository banks and generally trade on an established market in the United States or elsewhere. The underlying shares are held in trust by a custodian bank or similar financial institution in the issuer’s home country. ADRs, EDRs and GDRs are alternatives to directly purchasing the underlying foreign securities in their national markets. However, ADRs, EDRs, and GDRs are subject to many of the risks associated with investing directly in foreign securities, including currency risk and the political, economic, and social risks of the underlying issuer’s country.
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| Market Risks [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market Risk. The value of investments in the Portfolio may fluctuate suddenly and unexpectedly as a result of various market and economic factors, including those affecting individual companies, issuers or particular industries.
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| Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The Portfolio is subject to numerous risks, any of which could cause an investor to lose money. |