Net Assets Investment Company, Portfolio Turnover C000025097 [Member] The Bond Fund of America® - Class A C000077906 [Member] The Bond Fund of America® - Class R-6 C000164823 [Member] The Bond Fund of America® - Class R-5E C000025102 [Member] The Bond Fund of America® - Class R-5 C000025099 [Member] The Bond Fund of America® - Class R-2 C000148420 [Member] The Bond Fund of America® - Class R-2E C000025100 [Member] The Bond Fund of America® - Class R-3 C000025101 [Member] The Bond Fund of America® - Class R-4 C000025104 [Member] The Bond Fund of America® - Class C C000025105 [Member] The Bond Fund of America® - Class F-1 C000068564 [Member] The Bond Fund of America® - Class F-2 C000179983 [Member] The Bond Fund of America® - Class F-3 C000025106 [Member] The Bond Fund of America® - Class 529-A C000025108 [Member] The Bond Fund of America® - Class 529-C C000025109 [Member] The Bond Fund of America® - Class 529-E C000224619 [Member] The Bond Fund of America® - Class 529-F-2 C000224620 [Member] The Bond Fund of America® - Class 529-F-3 C000025098 [Member] The Bond Fund of America® - Class R-1 Investment Type [Axis] U S Treasury Bonds And Notes [Member] U.S. Treasury bonds & notes [Member] U.S. Treasury bonds and notes [Member] Corporate bonds and notes [Member] Corporate bonds and notes [Member] Mortgage-backed obligations [Member] Mortgage-backed obligations [Member] Asset-backed obligations [Member] Asset-backed obligations [Member] Bonds and notes of governments and government agencies outside the U.S. [Member] Municipals [Member] Municipals [Member] Loan [Member] Loans [Member] Federal Agency Bonds And Notes [Member] Federal agency bonds and notes [Member] Common Stock [Member] Preferred securities [Member] Preferred securities [Member] Short Term Securities And Other Assets Less Liabilities [Member] Short term securities & other assets less liabilities [Member] Short term securities and other assets less liabilities [Member] TBA sale commitments Mortgage-backed obligations [Member] Mortgage-backed obligations [Member]