AMERICAN FUNDS CORPORATE BOND 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 in debt instruments [Member] Investing in securities backed by the U.S. government [Member] Investing in derivatives [Member] Liquidity risk [Member] Investing outside the United States [Member] Investing in emerging markets [Member] Management [Member] Bloomberg U.S. Aggregate Index (reflects no deductions for sales charges, account fees, expenses or U.S. federal income taxes) Bloomberg U.S. Corporate Investment Grade Index (reflects no deductions for sales charges, account fees, expenses or U.S. federal income taxes) C000120249 Member index_ Bloomberg_ US_ Aggregate_ Index_reflects_no_deductions_for_sales_charges_account_fees_expenses_or_ US_federal_income_taxes Member C000120242 Member C000120252 Member C000120244 Member C000120257 Member C000179949 Member C000120247 Member Market Conditions Member Investing In Emerging Markets Member C000222346 Member C000120246 Member C000120256 Member C000120254 Member C000120251 Member Liquidity Risk Member Issuer Risks Member Investing In Derivatives Member C000222347 Member C000120248 Member C000120253 Member C000148464 Member C000164799 Member Investing In Securities Backed By The USGovernment Member ManagementMember Investing In Debt Instruments Member S000039110 Member Investing Outside The United States Member C000120245 Member index_ Bloomberg_ US_ Corporate_ Investment_ Grade_ Index_reflects_no_deductions_for_sales_charges_account_fees_expenses_or_ US_federal_income_taxes Member