SMALLCAP WORLD FUND INC Class A Class 529-A Class C Class 529-C Class 529-E Class T Class 529-T Class F-1 Class F-2 Class F-3 Class 529-F-1 Class 529-F-2 Class 529-F-3 Class R-1 Class R-2 Class R-3 Class R-4 Class R-5 Class R-6 Class R-2E Class R-5E Market conditions [Member] Issuer risks [Member] Investing in growth-oriented stocks [Member] Investing in small companies [Member] Investing outside the United States [Member] Investing in emerging markets [Member] Liquidity risk [Member] Management [Member] MSCI ACWI IMI (reflects no deductions for sales charges, account fees, expenses or U.S. federal income taxes) MSCI All Country World Small Cap Index (reflects no deductions for sales charges, account fees, expenses or U.S. federal income taxes) C000189498 Member C000026256 Member Investing In Small Companies Member Market Conditions Member Investing In Emerging Markets Member C000026253 Member C000026262 Member Investing In Growthoriented Stocks Member C000026258 Member C000224599 Member Liquidity Risk Member index_ MSCI_ All_ Country_ World_ Small_ Cap_ Index_reflects_no_deductions_for_sales_charges_account_fees_expenses_or_ US_federal_income_taxes Member C000180011 Member C000026250 Member C000164808 Member Issuer Risks Member C000026260 Member S000009599 Member C000189499 Member C000068590 Member C000026252 Member C000026257 Member C000077882 Member index_ MSCI_ ACWI_ IMI_reflects_no_deductions_for_sales_charges_account_fees_expenses_or_ US_federal_income_taxes_ Member C000026254 Member ManagementMember C000026261 Member C000026251 Member Investing Outside The United States Member C000026249 Member C000224600 Member C000148446 Member