Shareholder Report, Line Graph (Details) - USD ($)	12 Months Ended
Shareholder Report, Line Graph (Details) - USD ($)	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018	Sep. 01, 2017	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Emerging Markets Growth Fund - Class M [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Emerging Markets Growth Fund — Class M
Account Value	$ 12,525	$ 12,208	$ 11,414	$ 16,758	$ 11,857	$ 11,552	$ 11,033		$ 10,176	$ 8,113	$ 9,229	$ 10,000
Emerging Markets Growth Fund - Class F-3 [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Emerging Markets Growth Fund — Class F-3
Account Value	$ 11,492	11,220	10,491	15,406	10,905	10,640	10,177	$ 10,000
Emerging Markets Growth Fund - Class R-6 [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Emerging Markets Growth Fund — Class R-6
Account Value	$ 11,458	11,189	10,451	15,369	10,890	10,626	10,159	10,000
MSCI Emerging Markets IMI Index [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	MSCI Emerging Markets IMI Index
Account Value	$ 13,556	$ 11,937	$ 11,568	$ 15,374	$ 10,735	$ 11,179	$ 11,126	$ 10,000	$ 10,312	$ 8,396	$ 9,559	$ 10,000