International Growth and Income Fund Class A Class 529-A Class C Class 529-C Class 529-E Class F-1 Class F-2 Class F-3 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 outside the United States [Member] Investing in emerging markets [Member] Investing in growth-oriented stocks [Member] Investing in income-oriented stocks [Member] Management [Member] MSCI All Country World ex USA Index (reflects no deductions for sales charges, account fees, expenses or U.S. federal income taxes) C000068976 Member C000164802 Member C000222892 Member C000179950 Member C000068966 Member Market Conditions Member Investing In Emerging Markets Member C000068971 Member C000068973 Member Investing In Incomeoriented Stocks Member Investing In Growthoriented Stocks Member C000068968 Member S000023459 Member C000068970 Member Issuer Risks Member C000222891 Member C000068967 Member index_ MSCI_ All_ Country_ World_ex_ USA_ Index_reflects_no_deductions_for_sales_charges_account_fees_expenses_or_ US_federal_income_taxes Member C000068965 Member C000068975 Member ManagementMember C000077902 Member C000145095 Member C000068972 Member C000068964 Member C000068962 Member Investing Outside The United States Member