Net Assets Investment Company, Portfolio Turnover C000068962 [Member] International Growth and Income Fund - Class A C000068970 [Member] International Growth and Income Fund - Class C C000068968 [Member] International Growth and Income Fund - Class R-5 C000077902 [Member] International Growth and Income Fund - Class R-6 C000145095 [Member] International Growth and Income Fund - Class R-2E C000068966 [Member] International Growth and Income Fund - Class R-3 C000068967 [Member] International Growth and Income Fund - Class R-4 C000164802 [Member] International Growth and Income Fund - Class R-5E C000068975 [Member]  International Growth and Income Fund - Class 529-C C000068976 [Member]  International Growth and Income Fund - Class 529-E C000222891 [Member] International Growth and Income Fund - Class 529-F-2 C000222892 [Member] International Growth and Income Fund - Class 529-F-3 C000068964 [Member] International Growth and Income Fund - Class R-1 C000068965 [Member] International Growth and Income Fund - Class R-2 C000068971 [Member] International Growth and Income Fund - Class F1 C000068972 [Member] International Growth and Income Fund - Class F-2 C000179950 [Member] International Growth and Income Fund - Class F3 C000068973 [Member]  International Growth and Income Fund - Class 529-A MSCI ACWI (All Country World Index) ex USA [Member] MSCI ACWI (All Country World Index) ex USA Investment Type [Axis] Financial Services Sector [Member] Healthcare Sector [Member] Other securities [Member] Short Term Securities And Other Assets Less Liabilities [Member] Short-term securities & other assets less liabilities [Member] Other sectors [Member]