v3.25.2
Shareholder Report, Average Annual Return (Details)
 6 Months Ended 12 Months Ended 31 Months Ended 32 Months Ended 53 Months Ended 60 Months Ended 120 Months Ended
Apr. 30, 2025
Apr. 30, 2025
Apr. 30, 2025
Apr. 30, 2025
Apr. 30, 2025
Apr. 30, 2025
Apr. 30, 2025
C000011818 [Member]              
Average Annual Return [Line Items]              
Line Graph and Table Measure Name Fund            
Average Annual Return, Percent   11.49%       8.86% 5.42%
C000179658 [Member]              
Average Annual Return [Line Items]              
Line Graph and Table Measure Name Fund            
Average Annual Return, Percent   11.97%       9.30% 5.84%
C000011817 [Member]              
Average Annual Return [Line Items]              
Line Graph and Table Measure Name Fund            
Average Annual Return, Percent   11.82%       9.20% 5.76%
C000179659 [Member]              
Average Annual Return [Line Items]              
Line Graph and Table Measure Name Fund            
Average Annual Return, Percent   11.56%       9.43% 8.52%
C000011819 [Member]              
Average Annual Return [Line Items]              
Line Graph and Table Measure Name Fund            
Average Annual Return, Percent   11.19%       9.11% 8.23%
C000079785 [Member]              
Average Annual Return [Line Items]              
Line Graph and Table Measure Name Fund            
Average Annual Return, Percent   11.47%       9.34% 8.47%
C000011821 [Member]              
Average Annual Return [Line Items]              
Line Graph and Table Measure Name Fund            
Average Annual Return, Percent   7.89%       2.53% 1.23%
C000011822 [Member]              
Average Annual Return [Line Items]              
Line Graph and Table Measure Name Fund            
Average Annual Return, Percent   8.34%       2.50% 1.29%
C000138298 [Member]              
Average Annual Return [Line Items]              
Line Graph and Table Measure Name Fund            
Average Annual Return, Percent   8.47%       2.62% 1.43%
C000045117 [Member]              
Average Annual Return [Line Items]              
Line Graph and Table Measure Name Fund            
Average Annual Return, Percent   6.13%       6.76% 4.60%
C000045116 [Member]              
Average Annual Return [Line Items]              
Line Graph and Table Measure Name Fund            
Average Annual Return, Percent   6.29%       6.98% 4.84%
C000240396 [Member]              
Average Annual Return [Line Items]              
Line Graph and Table Measure Name Fund            
Average Annual Return, Percent   6.43%       7.06% 4.87%
C000064415 [Member]              
Average Annual Return [Line Items]              
Line Graph and Table Measure Name Fund            
Average Annual Return, Percent   7.64%       7.93% 0.55%
C000179660 [Member]              
Average Annual Return [Line Items]              
Line Graph and Table Measure Name Fund            
Average Annual Return, Percent   7.93%       8.29% 0.78%
C000064416 [Member]              
Average Annual Return [Line Items]              
Line Graph and Table Measure Name Fund            
Average Annual Return, Percent   7.25%       7.59% 0.19%
C000236826 [Member]              
Average Annual Return [Line Items]              
Line Graph and Table Measure Name   Fund          
Average Annual Return, Percent   2.62%   5.30%      
C000223577 [Member]              
Average Annual Return [Line Items]              
Line Graph and Table Measure Name Fund            
Average Annual Return, Percent   4.63%     (12.64%)    
C000238190 [Member]              
Average Annual Return [Line Items]              
Line Graph and Table Measure Name Fund            
Average Annual Return, Percent   13.80% 16.22%        
MSCI Frontier Emerging Markets Index [Member]              
Average Annual Return [Line Items]              
Line Graph and Table Measure Name MSCI Frontier Emerging Markets Index            
Average Annual Return, Percent   11.83%       7.53% 1.07%
MSCI ACWI ex US Index [Member]              
Average Annual Return [Line Items]              
Line Graph and Table Measure Name MSCI ACWI ex US Index            
Average Annual Return, Percent [1]   11.92%       10.09% 4.83%
MSCI Emerging Markets ex China Index [Member]              
Average Annual Return [Line Items]              
Line Graph and Table Measure Name   MSCI Emerging Markets ex China Index          
Average Annual Return, Percent   3.30%   9.07%      
MSCI China All Shares Index [Member]              
Average Annual Return [Line Items]              
Line Graph and Table Measure Name MSCI China All Shares Index            
Average Annual Return, Percent   17.92%     (6.59%)    
MSCI Emerging Markets Index [Member]              
Average Annual Return [Line Items]              
Line Graph and Table Measure Name MSCI Emerging Markets Index            
Average Annual Return, Percent   9.02%       6.35% 3.07%
MSCI All Country World Index [Member]              
Average Annual Return [Line Items]              
Line Graph and Table Measure Name MSCI All Country World Index            
Average Annual Return, Percent   11.84%       13.07% 8.63%
MSCI All Country World ex US Index [Member]              
Average Annual Return [Line Items]              
Line Graph and Table Measure Name MSCI All Country World ex US Index            
Average Annual Return, Percent   11.92%       10.09% 4.83%
MSCI World ex US Index [Member]              
Average Annual Return [Line Items]              
Line Graph and Table Measure Name MSCI World ex US Index            
Average Annual Return, Percent   13.10% 19.92%        
MSCI EAFE Index [Member]              
Average Annual Return [Line Items]              
Line Graph and Table Measure Name MSCI EAFE Index            
Average Annual Return, Percent   12.57% 20.52%        
MSCI ACWI ex US Small Cap Index [Member]              
Average Annual Return [Line Items]              
Line Graph and Table Measure Name MSCI ACWI ex US Small Cap Index            
Average Annual Return, Percent [1]   8.23%       10.31% 5.19%
[1] In accordance with new regulatory requirements, the Fund has selected the MSCI ACWI ex US Index as the Fund's broad-based securities market index. The Fund has selected the MSCI ACWI ex US Small Cap Index as a secondary benchmark.