Shareholder Report, Holdings (Details)
|
Mar. 31, 2026 |
| SMALLCAP World Fund - Class A | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
28.15%
|
| SMALLCAP World Fund - Class A | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.19%
|
| SMALLCAP World Fund - Class A | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.11%
|
| SMALLCAP World Fund - Class A | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.57%
|
| SMALLCAP World Fund - Class A | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.86%
|
| SMALLCAP World Fund - Class A | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.29%
|
| SMALLCAP World Fund - Class A | Unclassified Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.85%
|
| SMALLCAP World Fund - Class A | Other securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.24%
|
| SMALLCAP World Fund - Class A | Bonds, Notes And Other Debt Instruments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.01%
|
| SMALLCAP World Fund - Class A | Short-term securities & other assets less liabilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.73%
|
| SMALLCAP World Fund - Class C | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
28.15%
|
| SMALLCAP World Fund - Class C | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.19%
|
| SMALLCAP World Fund - Class C | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.11%
|
| SMALLCAP World Fund - Class C | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.57%
|
| SMALLCAP World Fund - Class C | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.86%
|
| SMALLCAP World Fund - Class C | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.29%
|
| SMALLCAP World Fund - Class C | Unclassified Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.85%
|
| SMALLCAP World Fund - Class C | Other securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.24%
|
| SMALLCAP World Fund - Class C | Bonds, Notes And Other Debt Instruments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.01%
|
| SMALLCAP World Fund - Class C | Short-term securities & other assets less liabilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.73%
|
| SMALLCAP World Fund - Class T | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
28.15%
|
| SMALLCAP World Fund - Class T | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.19%
|
| SMALLCAP World Fund - Class T | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.11%
|
| SMALLCAP World Fund - Class T | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.57%
|
| SMALLCAP World Fund - Class T | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.86%
|
| SMALLCAP World Fund - Class T | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.29%
|
| SMALLCAP World Fund - Class T | Unclassified Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.85%
|
| SMALLCAP World Fund - Class T | Other securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.24%
|
| SMALLCAP World Fund - Class T | Bonds, Notes And Other Debt Instruments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.01%
|
| SMALLCAP World Fund - Class T | Short-term securities & other assets less liabilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.73%
|
| SMALLCAP World Fund - Class F-1 | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
28.15%
|
| SMALLCAP World Fund - Class F-1 | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.19%
|
| SMALLCAP World Fund - Class F-1 | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.11%
|
| SMALLCAP World Fund - Class F-1 | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.57%
|
| SMALLCAP World Fund - Class F-1 | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.86%
|
| SMALLCAP World Fund - Class F-1 | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.29%
|
| SMALLCAP World Fund - Class F-1 | Unclassified Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.85%
|
| SMALLCAP World Fund - Class F-1 | Other securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.24%
|
| SMALLCAP World Fund - Class F-1 | Bonds, Notes And Other Debt Instruments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.01%
|
| SMALLCAP World Fund - Class F-1 | Short-term securities & other assets less liabilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.73%
|
| SMALLCAP World Fund - Class F-2 | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
28.15%
|
| SMALLCAP World Fund - Class F-2 | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.19%
|
| SMALLCAP World Fund - Class F-2 | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.11%
|
| SMALLCAP World Fund - Class F-2 | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.57%
|
| SMALLCAP World Fund - Class F-2 | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.86%
|
| SMALLCAP World Fund - Class F-2 | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.29%
|
| SMALLCAP World Fund - Class F-2 | Unclassified Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.85%
|
| SMALLCAP World Fund - Class F-2 | Other securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.24%
|
| SMALLCAP World Fund - Class F-2 | Bonds, Notes And Other Debt Instruments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.01%
|
| SMALLCAP World Fund - Class F-2 | Short-term securities & other assets less liabilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.73%
|
| SMALLCAP World Fund - Class F-3 | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
28.15%
|
| SMALLCAP World Fund - Class F-3 | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.19%
|
| SMALLCAP World Fund - Class F-3 | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.11%
|
| SMALLCAP World Fund - Class F-3 | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.57%
|
| SMALLCAP World Fund - Class F-3 | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.86%
|
| SMALLCAP World Fund - Class F-3 | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.29%
|
| SMALLCAP World Fund - Class F-3 | Unclassified Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.85%
|
| SMALLCAP World Fund - Class F-3 | Other securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.24%
|
| SMALLCAP World Fund - Class F-3 | Bonds, Notes And Other Debt Instruments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.01%
|
| SMALLCAP World Fund - Class F-3 | Short-term securities & other assets less liabilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.73%
|
| SMALLCAP World Fund - Class 529-A | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
28.15%
|
| SMALLCAP World Fund - Class 529-A | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.19%
|
| SMALLCAP World Fund - Class 529-A | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.11%
|
| SMALLCAP World Fund - Class 529-A | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.57%
|
| SMALLCAP World Fund - Class 529-A | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.86%
|
| SMALLCAP World Fund - Class 529-A | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.29%
|
| SMALLCAP World Fund - Class 529-A | Unclassified Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.85%
|
| SMALLCAP World Fund - Class 529-A | Other securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.24%
|
| SMALLCAP World Fund - Class 529-A | Bonds, Notes And Other Debt Instruments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.01%
|
| SMALLCAP World Fund - Class 529-A | Short-term securities & other assets less liabilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.73%
|
| SMALLCAP World Fund - Class 529-C | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
28.15%
|
| SMALLCAP World Fund - Class 529-C | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.19%
|
| SMALLCAP World Fund - Class 529-C | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.11%
|
| SMALLCAP World Fund - Class 529-C | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.57%
|
| SMALLCAP World Fund - Class 529-C | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.86%
|
| SMALLCAP World Fund - Class 529-C | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.29%
|
| SMALLCAP World Fund - Class 529-C | Unclassified Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.85%
|
| SMALLCAP World Fund - Class 529-C | Other securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.24%
|
| SMALLCAP World Fund - Class 529-C | Bonds, Notes And Other Debt Instruments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.01%
|
| SMALLCAP World Fund - Class 529-C | Short-term securities & other assets less liabilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.73%
|
| SMALLCAP World Fund - Class 529-E | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
28.15%
|
| SMALLCAP World Fund - Class 529-E | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.19%
|
| SMALLCAP World Fund - Class 529-E | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.11%
|
| SMALLCAP World Fund - Class 529-E | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.57%
|
| SMALLCAP World Fund - Class 529-E | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.86%
|
| SMALLCAP World Fund - Class 529-E | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.29%
|
| SMALLCAP World Fund - Class 529-E | Unclassified Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.85%
|
| SMALLCAP World Fund - Class 529-E | Other securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.24%
|
| SMALLCAP World Fund - Class 529-E | Bonds, Notes And Other Debt Instruments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.01%
|
| SMALLCAP World Fund - Class 529-E | Short-term securities & other assets less liabilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.73%
|
| SMALLCAP World Fund - Class 529-T | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
28.15%
|
| SMALLCAP World Fund - Class 529-T | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.19%
|
| SMALLCAP World Fund - Class 529-T | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.11%
|
| SMALLCAP World Fund - Class 529-T | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.57%
|
| SMALLCAP World Fund - Class 529-T | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.86%
|
| SMALLCAP World Fund - Class 529-T | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.29%
|
| SMALLCAP World Fund - Class 529-T | Unclassified Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.85%
|
| SMALLCAP World Fund - Class 529-T | Other securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.24%
|
| SMALLCAP World Fund - Class 529-T | Bonds, Notes And Other Debt Instruments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.01%
|
| SMALLCAP World Fund - Class 529-T | Short-term securities & other assets less liabilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.73%
|
| SMALLCAP World Fund - Class 529-F-1 | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
28.15%
|
| SMALLCAP World Fund - Class 529-F-1 | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.19%
|
| SMALLCAP World Fund - Class 529-F-1 | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.11%
|
| SMALLCAP World Fund - Class 529-F-1 | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.57%
|
| SMALLCAP World Fund - Class 529-F-1 | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.86%
|
| SMALLCAP World Fund - Class 529-F-1 | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.29%
|
| SMALLCAP World Fund - Class 529-F-1 | Unclassified Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.85%
|
| SMALLCAP World Fund - Class 529-F-1 | Other securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.24%
|
| SMALLCAP World Fund - Class 529-F-1 | Bonds, Notes And Other Debt Instruments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.01%
|
| SMALLCAP World Fund - Class 529-F-1 | Short-term securities & other assets less liabilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.73%
|
| SMALLCAP World Fund - Class 529-F-2 | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
28.15%
|
| SMALLCAP World Fund - Class 529-F-2 | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.19%
|
| SMALLCAP World Fund - Class 529-F-2 | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.11%
|
| SMALLCAP World Fund - Class 529-F-2 | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.57%
|
| SMALLCAP World Fund - Class 529-F-2 | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.86%
|
| SMALLCAP World Fund - Class 529-F-2 | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.29%
|
| SMALLCAP World Fund - Class 529-F-2 | Unclassified Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.85%
|
| SMALLCAP World Fund - Class 529-F-2 | Other securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.24%
|
| SMALLCAP World Fund - Class 529-F-2 | Bonds, Notes And Other Debt Instruments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.01%
|
| SMALLCAP World Fund - Class 529-F-2 | Short-term securities & other assets less liabilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.73%
|
| SMALLCAP World Fund - Class 529-F-3 | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
28.15%
|
| SMALLCAP World Fund - Class 529-F-3 | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.19%
|
| SMALLCAP World Fund - Class 529-F-3 | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.11%
|
| SMALLCAP World Fund - Class 529-F-3 | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.57%
|
| SMALLCAP World Fund - Class 529-F-3 | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.86%
|
| SMALLCAP World Fund - Class 529-F-3 | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.29%
|
| SMALLCAP World Fund - Class 529-F-3 | Unclassified Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.85%
|
| SMALLCAP World Fund - Class 529-F-3 | Other securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.24%
|
| SMALLCAP World Fund - Class 529-F-3 | Bonds, Notes And Other Debt Instruments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.01%
|
| SMALLCAP World Fund - Class 529-F-3 | Short-term securities & other assets less liabilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.73%
|
| SMALLCAP World Fund - Class R-1 | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
28.15%
|
| SMALLCAP World Fund - Class R-1 | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.19%
|
| SMALLCAP World Fund - Class R-1 | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.11%
|
| SMALLCAP World Fund - Class R-1 | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.57%
|
| SMALLCAP World Fund - Class R-1 | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.86%
|
| SMALLCAP World Fund - Class R-1 | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.29%
|
| SMALLCAP World Fund - Class R-1 | Unclassified Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.85%
|
| SMALLCAP World Fund - Class R-1 | Other securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.24%
|
| SMALLCAP World Fund - Class R-1 | Bonds, Notes And Other Debt Instruments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.01%
|
| SMALLCAP World Fund - Class R-1 | Short-term securities & other assets less liabilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.73%
|
| SMALLCAP World Fund - Class R-2 | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
28.15%
|
| SMALLCAP World Fund - Class R-2 | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.19%
|
| SMALLCAP World Fund - Class R-2 | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.11%
|
| SMALLCAP World Fund - Class R-2 | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.57%
|
| SMALLCAP World Fund - Class R-2 | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.86%
|
| SMALLCAP World Fund - Class R-2 | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.29%
|
| SMALLCAP World Fund - Class R-2 | Unclassified Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.85%
|
| SMALLCAP World Fund - Class R-2 | Other securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.24%
|
| SMALLCAP World Fund - Class R-2 | Bonds, Notes And Other Debt Instruments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.01%
|
| SMALLCAP World Fund - Class R-2 | Short-term securities & other assets less liabilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.73%
|
| SMALLCAP World Fund - Class R-2E | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
28.15%
|
| SMALLCAP World Fund - Class R-2E | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.19%
|
| SMALLCAP World Fund - Class R-2E | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.11%
|
| SMALLCAP World Fund - Class R-2E | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.57%
|
| SMALLCAP World Fund - Class R-2E | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.86%
|
| SMALLCAP World Fund - Class R-2E | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.29%
|
| SMALLCAP World Fund - Class R-2E | Unclassified Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.85%
|
| SMALLCAP World Fund - Class R-2E | Other securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.24%
|
| SMALLCAP World Fund - Class R-2E | Bonds, Notes And Other Debt Instruments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.01%
|
| SMALLCAP World Fund - Class R-2E | Short-term securities & other assets less liabilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.73%
|
| SMALLCAP World Fund - Class R-3 | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
28.15%
|
| SMALLCAP World Fund - Class R-3 | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.19%
|
| SMALLCAP World Fund - Class R-3 | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.11%
|
| SMALLCAP World Fund - Class R-3 | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.57%
|
| SMALLCAP World Fund - Class R-3 | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.86%
|
| SMALLCAP World Fund - Class R-3 | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.29%
|
| SMALLCAP World Fund - Class R-3 | Unclassified Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.85%
|
| SMALLCAP World Fund - Class R-3 | Other securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.24%
|
| SMALLCAP World Fund - Class R-3 | Bonds, Notes And Other Debt Instruments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.01%
|
| SMALLCAP World Fund - Class R-3 | Short-term securities & other assets less liabilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.73%
|
| SMALLCAP World Fund - Class R-4 | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
28.15%
|
| SMALLCAP World Fund - Class R-4 | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.19%
|
| SMALLCAP World Fund - Class R-4 | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.11%
|
| SMALLCAP World Fund - Class R-4 | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.57%
|
| SMALLCAP World Fund - Class R-4 | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.86%
|
| SMALLCAP World Fund - Class R-4 | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.29%
|
| SMALLCAP World Fund - Class R-4 | Unclassified Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.85%
|
| SMALLCAP World Fund - Class R-4 | Other securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.24%
|
| SMALLCAP World Fund - Class R-4 | Bonds, Notes And Other Debt Instruments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.01%
|
| SMALLCAP World Fund - Class R-4 | Short-term securities & other assets less liabilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.73%
|
| SMALLCAP World Fund - Class R-5E | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
28.15%
|
| SMALLCAP World Fund - Class R-5E | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.19%
|
| SMALLCAP World Fund - Class R-5E | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.11%
|
| SMALLCAP World Fund - Class R-5E | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.57%
|
| SMALLCAP World Fund - Class R-5E | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.86%
|
| SMALLCAP World Fund - Class R-5E | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.29%
|
| SMALLCAP World Fund - Class R-5E | Unclassified Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.85%
|
| SMALLCAP World Fund - Class R-5E | Other securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.24%
|
| SMALLCAP World Fund - Class R-5E | Bonds, Notes And Other Debt Instruments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.01%
|
| SMALLCAP World Fund - Class R-5E | Short-term securities & other assets less liabilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.73%
|
| SMALLCAP World Fund - Class R-5 | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
28.15%
|
| SMALLCAP World Fund - Class R-5 | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.19%
|
| SMALLCAP World Fund - Class R-5 | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.11%
|
| SMALLCAP World Fund - Class R-5 | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.57%
|
| SMALLCAP World Fund - Class R-5 | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.86%
|
| SMALLCAP World Fund - Class R-5 | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.29%
|
| SMALLCAP World Fund - Class R-5 | Unclassified Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.85%
|
| SMALLCAP World Fund - Class R-5 | Other securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.24%
|
| SMALLCAP World Fund - Class R-5 | Bonds, Notes And Other Debt Instruments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.01%
|
| SMALLCAP World Fund - Class R-5 | Short-term securities & other assets less liabilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.73%
|
| SMALLCAP World Fund - Class R-6 | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
28.15%
|
| SMALLCAP World Fund - Class R-6 | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.19%
|
| SMALLCAP World Fund - Class R-6 | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.11%
|
| SMALLCAP World Fund - Class R-6 | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.57%
|
| SMALLCAP World Fund - Class R-6 | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.86%
|
| SMALLCAP World Fund - Class R-6 | Materials Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.29%
|
| SMALLCAP World Fund - Class R-6 | Unclassified Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.85%
|
| SMALLCAP World Fund - Class R-6 | Other securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.24%
|
| SMALLCAP World Fund - Class R-6 | Bonds, Notes And Other Debt Instruments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.01%
|
| SMALLCAP World Fund - Class R-6 | Short-term securities & other assets less liabilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.73%
|