Net Assets Investment Company, Portfolio Turnover C000120242 [Member] American Funds Corporate Bond Fund® - Class A C000120249 [Member] American Funds Corporate Bond Fund® - Class R-6 C000164799 [Member] American Funds Corporate Bond Fund® - Class R-5E C000120248 [Member] American Funds Corporate Bond Fund® - Class R-5 C000120245 [Member] American Funds Corporate Bond Fund® - Class R-2 C000148464 [Member] American Funds Corporate Bond Fund® - Class R-2E C000120246 [Member] American Funds Corporate Bond Fund® - Class R-3 C000120247 [Member] American Funds Corporate Bond Fund® - Class R-4 C000120251 [Member] American Funds Corporate Bond Fund® - Class C C000189421 [Member] American Funds Corporate Bond Fund® - Class T C000120252 [Member] American Funds Corporate Bond Fund® - Class F-1 C000120253 [Member] American Funds Corporate Bond Fund® - Class F-2 C000179949 [Member] American Funds Corporate Bond Fund® - Class F-3 C000120254 [Member] American Funds Corporate Bond Fund® - Class 529-A C000120256 [Member] American Funds Corporate Bond Fund® - Class 529-C C000120257 [Member] American Funds Corporate Bond Fund® - Class 529-E C000189420 [Member] American Funds Corporate Bond Fund® - Class 529-T C000120243 [Member] American Funds Corporate Bond Fund® - Class 529-F-1 C000222346 [Member] American Funds Corporate Bond Fund® - Class 529-F-2 C000222347 [Member] American Funds Corporate Bond Fund® - Class 529-F-3 C000120244 [Member] American Funds Corporate Bond Fund® - Class R-1 Bloomberg U.S. Corporate Investment Grade Index [Member] Bloomberg U.S. Aggregate Index [Member] Investment Type [Axis] Financial Services Sector [Member] Healthcare Sector [Member] Other Corporate Bonds And Notes [Member] Other corporate bonds and notes [Member] U S Treasury Bonds And Notes [Member] U.S. Treasury bonds & notes [Member] Other Bonds And Notes [Member] Other bonds & notes [Member] Short Term Securities And Other Assets Less Liabilities [Member] Short-term securities & other assets less liabilities [Member]