v3.26.1
Shareholder Report, Holdings (Details)
Jun. 30, 2026
International Growth and Income Fund - Class A | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.73%
International Growth and Income Fund - Class A | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.65%
International Growth and Income Fund - Class A | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.99%
International Growth and Income Fund - Class A | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.31%
International Growth and Income Fund - Class A | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.05%
International Growth and Income Fund - Class A | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.68%
International Growth and Income Fund - Class A | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.48%
International Growth and Income Fund - Class A | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.11%
International Growth and Income Fund - Class A | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.59%
International Growth and Income Fund - Class A | Other securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.12%
International Growth and Income Fund - Class A | Short-term securities & other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.29%
International Growth and Income Fund - Class C | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.73%
International Growth and Income Fund - Class C | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.65%
International Growth and Income Fund - Class C | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.99%
International Growth and Income Fund - Class C | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.31%
International Growth and Income Fund - Class C | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.05%
International Growth and Income Fund - Class C | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.68%
International Growth and Income Fund - Class C | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.48%
International Growth and Income Fund - Class C | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.11%
International Growth and Income Fund - Class C | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.59%
International Growth and Income Fund - Class C | Other securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.12%
International Growth and Income Fund - Class C | Short-term securities & other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.29%
International Growth and Income Fund - Class F1 | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.73%
International Growth and Income Fund - Class F1 | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.65%
International Growth and Income Fund - Class F1 | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.99%
International Growth and Income Fund - Class F1 | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.31%
International Growth and Income Fund - Class F1 | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.05%
International Growth and Income Fund - Class F1 | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.68%
International Growth and Income Fund - Class F1 | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.48%
International Growth and Income Fund - Class F1 | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.11%
International Growth and Income Fund - Class F1 | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.59%
International Growth and Income Fund - Class F1 | Other securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.12%
International Growth and Income Fund - Class F1 | Short-term securities & other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.29%
International Growth and Income Fund - Class F-2 | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.73%
International Growth and Income Fund - Class F-2 | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.65%
International Growth and Income Fund - Class F-2 | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.99%
International Growth and Income Fund - Class F-2 | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.31%
International Growth and Income Fund - Class F-2 | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.05%
International Growth and Income Fund - Class F-2 | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.68%
International Growth and Income Fund - Class F-2 | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.48%
International Growth and Income Fund - Class F-2 | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.11%
International Growth and Income Fund - Class F-2 | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.59%
International Growth and Income Fund - Class F-2 | Other securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.12%
International Growth and Income Fund - Class F-2 | Short-term securities & other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.29%
International Growth and Income Fund - Class F3 | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.73%
International Growth and Income Fund - Class F3 | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.65%
International Growth and Income Fund - Class F3 | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.99%
International Growth and Income Fund - Class F3 | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.31%
International Growth and Income Fund - Class F3 | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.05%
International Growth and Income Fund - Class F3 | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.68%
International Growth and Income Fund - Class F3 | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.48%
International Growth and Income Fund - Class F3 | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.11%
International Growth and Income Fund - Class F3 | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.59%
International Growth and Income Fund - Class F3 | Other securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.12%
International Growth and Income Fund - Class F3 | Short-term securities & other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.29%
 International Growth and Income Fund - Class 529-A | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.73%
 International Growth and Income Fund - Class 529-A | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.65%
 International Growth and Income Fund - Class 529-A | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.99%
 International Growth and Income Fund - Class 529-A | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.31%
 International Growth and Income Fund - Class 529-A | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.05%
 International Growth and Income Fund - Class 529-A | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.68%
 International Growth and Income Fund - Class 529-A | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.48%
 International Growth and Income Fund - Class 529-A | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.11%
 International Growth and Income Fund - Class 529-A | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.59%
 International Growth and Income Fund - Class 529-A | Other securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.12%
 International Growth and Income Fund - Class 529-A | Short-term securities & other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.29%
 International Growth and Income Fund - Class 529-C | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.73%
 International Growth and Income Fund - Class 529-C | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.65%
 International Growth and Income Fund - Class 529-C | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.99%
 International Growth and Income Fund - Class 529-C | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.31%
 International Growth and Income Fund - Class 529-C | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.05%
 International Growth and Income Fund - Class 529-C | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.68%
 International Growth and Income Fund - Class 529-C | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.48%
 International Growth and Income Fund - Class 529-C | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.11%
 International Growth and Income Fund - Class 529-C | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.59%
 International Growth and Income Fund - Class 529-C | Other securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.12%
 International Growth and Income Fund - Class 529-C | Short-term securities & other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.29%
 International Growth and Income Fund - Class 529-E | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.73%
 International Growth and Income Fund - Class 529-E | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.65%
 International Growth and Income Fund - Class 529-E | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.99%
 International Growth and Income Fund - Class 529-E | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.31%
 International Growth and Income Fund - Class 529-E | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.05%
 International Growth and Income Fund - Class 529-E | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.68%
 International Growth and Income Fund - Class 529-E | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.48%
 International Growth and Income Fund - Class 529-E | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.11%
 International Growth and Income Fund - Class 529-E | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.59%
 International Growth and Income Fund - Class 529-E | Other securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.12%
 International Growth and Income Fund - Class 529-E | Short-term securities & other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.29%
International Growth and Income Fund - Class 529-F-2 | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.73%
International Growth and Income Fund - Class 529-F-2 | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.65%
International Growth and Income Fund - Class 529-F-2 | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.99%
International Growth and Income Fund - Class 529-F-2 | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.31%
International Growth and Income Fund - Class 529-F-2 | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.05%
International Growth and Income Fund - Class 529-F-2 | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.68%
International Growth and Income Fund - Class 529-F-2 | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.48%
International Growth and Income Fund - Class 529-F-2 | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.11%
International Growth and Income Fund - Class 529-F-2 | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.59%
International Growth and Income Fund - Class 529-F-2 | Other securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.12%
International Growth and Income Fund - Class 529-F-2 | Short-term securities & other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.29%
International Growth and Income Fund - Class 529-F-3 | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.73%
International Growth and Income Fund - Class 529-F-3 | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.65%
International Growth and Income Fund - Class 529-F-3 | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.99%
International Growth and Income Fund - Class 529-F-3 | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.31%
International Growth and Income Fund - Class 529-F-3 | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.05%
International Growth and Income Fund - Class 529-F-3 | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.68%
International Growth and Income Fund - Class 529-F-3 | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.48%
International Growth and Income Fund - Class 529-F-3 | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.11%
International Growth and Income Fund - Class 529-F-3 | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.59%
International Growth and Income Fund - Class 529-F-3 | Other securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.12%
International Growth and Income Fund - Class 529-F-3 | Short-term securities & other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.29%
International Growth and Income Fund - Class R-1 | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.73%
International Growth and Income Fund - Class R-1 | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.65%
International Growth and Income Fund - Class R-1 | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.99%
International Growth and Income Fund - Class R-1 | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.31%
International Growth and Income Fund - Class R-1 | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.05%
International Growth and Income Fund - Class R-1 | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.68%
International Growth and Income Fund - Class R-1 | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.48%
International Growth and Income Fund - Class R-1 | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.11%
International Growth and Income Fund - Class R-1 | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.59%
International Growth and Income Fund - Class R-1 | Other securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.12%
International Growth and Income Fund - Class R-1 | Short-term securities & other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.29%
International Growth and Income Fund - Class R-2 | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.73%
International Growth and Income Fund - Class R-2 | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.65%
International Growth and Income Fund - Class R-2 | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.99%
International Growth and Income Fund - Class R-2 | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.31%
International Growth and Income Fund - Class R-2 | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.05%
International Growth and Income Fund - Class R-2 | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.68%
International Growth and Income Fund - Class R-2 | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.48%
International Growth and Income Fund - Class R-2 | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.11%
International Growth and Income Fund - Class R-2 | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.59%
International Growth and Income Fund - Class R-2 | Other securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.12%
International Growth and Income Fund - Class R-2 | Short-term securities & other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.29%
International Growth and Income Fund - Class R-2E | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.73%
International Growth and Income Fund - Class R-2E | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.65%
International Growth and Income Fund - Class R-2E | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.99%
International Growth and Income Fund - Class R-2E | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.31%
International Growth and Income Fund - Class R-2E | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.05%
International Growth and Income Fund - Class R-2E | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.68%
International Growth and Income Fund - Class R-2E | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.48%
International Growth and Income Fund - Class R-2E | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.11%
International Growth and Income Fund - Class R-2E | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.59%
International Growth and Income Fund - Class R-2E | Other securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.12%
International Growth and Income Fund - Class R-2E | Short-term securities & other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.29%
International Growth and Income Fund - Class R-3 | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.73%
International Growth and Income Fund - Class R-3 | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.65%
International Growth and Income Fund - Class R-3 | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.99%
International Growth and Income Fund - Class R-3 | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.31%
International Growth and Income Fund - Class R-3 | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.05%
International Growth and Income Fund - Class R-3 | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.68%
International Growth and Income Fund - Class R-3 | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.48%
International Growth and Income Fund - Class R-3 | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.11%
International Growth and Income Fund - Class R-3 | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.59%
International Growth and Income Fund - Class R-3 | Other securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.12%
International Growth and Income Fund - Class R-3 | Short-term securities & other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.29%
International Growth and Income Fund - Class R-4 | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.73%
International Growth and Income Fund - Class R-4 | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.65%
International Growth and Income Fund - Class R-4 | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.99%
International Growth and Income Fund - Class R-4 | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.31%
International Growth and Income Fund - Class R-4 | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.05%
International Growth and Income Fund - Class R-4 | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.68%
International Growth and Income Fund - Class R-4 | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.48%
International Growth and Income Fund - Class R-4 | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.11%
International Growth and Income Fund - Class R-4 | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.59%
International Growth and Income Fund - Class R-4 | Other securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.12%
International Growth and Income Fund - Class R-4 | Short-term securities & other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.29%
International Growth and Income Fund - Class R-5E | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.73%
International Growth and Income Fund - Class R-5E | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.65%
International Growth and Income Fund - Class R-5E | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.99%
International Growth and Income Fund - Class R-5E | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.31%
International Growth and Income Fund - Class R-5E | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.05%
International Growth and Income Fund - Class R-5E | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.68%
International Growth and Income Fund - Class R-5E | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.48%
International Growth and Income Fund - Class R-5E | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.11%
International Growth and Income Fund - Class R-5E | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.59%
International Growth and Income Fund - Class R-5E | Other securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.12%
International Growth and Income Fund - Class R-5E | Short-term securities & other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.29%
International Growth and Income Fund - Class R-5 | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.73%
International Growth and Income Fund - Class R-5 | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.65%
International Growth and Income Fund - Class R-5 | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.99%
International Growth and Income Fund - Class R-5 | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.31%
International Growth and Income Fund - Class R-5 | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.05%
International Growth and Income Fund - Class R-5 | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.68%
International Growth and Income Fund - Class R-5 | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.48%
International Growth and Income Fund - Class R-5 | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.11%
International Growth and Income Fund - Class R-5 | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.59%
International Growth and Income Fund - Class R-5 | Other securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.12%
International Growth and Income Fund - Class R-5 | Short-term securities & other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.29%
International Growth and Income Fund - Class R-6 | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.73%
International Growth and Income Fund - Class R-6 | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.65%
International Growth and Income Fund - Class R-6 | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.99%
International Growth and Income Fund - Class R-6 | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.31%
International Growth and Income Fund - Class R-6 | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.05%
International Growth and Income Fund - Class R-6 | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.68%
International Growth and Income Fund - Class R-6 | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.48%
International Growth and Income Fund - Class R-6 | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.11%
International Growth and Income Fund - Class R-6 | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.59%
International Growth and Income Fund - Class R-6 | Other securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.12%
International Growth and Income Fund - Class R-6 | Short-term securities & other assets less liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.29%