Net Assets Investment Company, Portfolio Turnover C000025064 [Member] The Growth Fund of America® - Class A C000025071 [Member] The Growth Fund of America - Class C C000025072 [Member] The Growth Fund of America® - Class F-1 C000068598 [Member] The Growth Fund of America® - Class F-2 C000025068 [Member] The Growth Fund of America® - Class R-4 C000162626 [Member] The Growth Fund of America® - Class R-5E C000025069 [Member] The Growth Fund of America® - Class R-5 C000077891 [Member] The Growth Fund of America® - Class R-6 C000180003 [Member] The Growth Fund of America® - Class F-3 C000025073 [Member] The Growth Fund of America® - Class 529-A C000025075 [Member] The Growth Fund of America® - Class 529-C C000025076 [Member] The Growth Fund of America® - Class 529-E C000224555 [Member] The Growth Fund of America® - Class 529-F-2 C000224556 [Member] The Growth Fund of America® - Class 529-F-3 C000025065 [Member] The Growth Fund of America® - Class R-1 C000025066 [Member] The Growth Fund of America® - Class R-2 C000148456 [Member] The Growth Fund of America® - Class R-2E C000025067 [Member] The Growth Fund of America® - Class R-3 StandardPoors500IndexMember Standard & Poor's 500 Index [Member] Investment Type [Axis] Healthcare Sector [Member] Financial Services Sector [Member] Other Securities [Member] Other securities [Member] Short Term Securities And Other Assets Less Liabilities [Member] Short-term securities & other assets less liabilities [Member]