v3.26.1
S000020012 [Member] Average Annual Total Returns
 12 Months Ended 60 Months Ended 114 Months Ended 120 Months Ended 206 Months Ended 216 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
MSCI ACWI Index (Net Return) (reflects reinvested dividends net of withholding taxes but reflects no deduction for fees, expenses or other taxes)            
Prospectus [Line Items]            
Average Annual Return, Percent [1] 22.34% 11.19%   11.72%    
S&P Global Infrastructure Index (Net Return) (reflects reinvested dividends net of withholding taxes but reflects no deduction for fees, expenses or other taxes)            
Prospectus [Line Items]            
Average Annual Return, Percent [2] 21.54% 10.02%   8.47%    
Lipper Global Infrastructure Funds Classification Average (reflects no deduction for taxes or sales loads)            
Prospectus [Line Items]            
Average Annual Return, Percent [3] 19.19% 7.35%   8.11%    
Class A            
Prospectus [Line Items]            
Average Annual Return, Percent 10.91% 7.41%   7.84%  
Performance Inception Date           Dec. 17, 2007
Class A | After Taxes on Distributions            
Prospectus [Line Items]            
Average Annual Return, Percent 8.30% 5.74%   6.20%  
Performance Inception Date           Dec. 17, 2007
Class A | After Taxes on Distributions and Sales            
Prospectus [Line Items]            
Average Annual Return, Percent 8.02% 5.55%   5.88%  
Performance Inception Date           Dec. 17, 2007
Class I            
Prospectus [Line Items]            
Average Annual Return, Percent 18.05% 8.97%   8.75%  
Performance Inception Date           Dec. 17, 2007
Class C            
Prospectus [Line Items]            
Average Annual Return, Percent 16.88% 7.88%   7.82%  
Performance Inception Date         Nov. 03, 2008  
Class R6            
Prospectus [Line Items]            
Average Annual Return, Percent 18.16% 9.04% 7.87%    
Performance Inception Date     Jun. 30, 2016      
Class R6 | MSCI ACWI Index (Net Return) (reflects reinvested dividends net of withholding taxes but reflects no deduction for fees, expenses or other taxes)            
Prospectus [Line Items]            
Average Annual Return, Percent [1]     12.23%      
Class R6 | S&P Global Infrastructure Index (Net Return) (reflects reinvested dividends net of withholding taxes but reflects no deduction for fees, expenses or other taxes)            
Prospectus [Line Items]            
Average Annual Return, Percent [2]     7.48%      
Class R6 | Lipper Global Infrastructure Funds Classification Average (reflects no deduction for taxes or sales loads)            
Prospectus [Line Items]            
Average Annual Return, Percent [3]     7.15%      
[1]
An index designed to measure the performance of large and mid-cap stocks across 23 developed and 24 emerging markets.
[2]
An index designed to measure the performance of listed infrastructure companies from around the world. To create diversified exposure across the global listed infrastructure market, the index has balanced weights across three distinct infrastructure clusters: utilities, transportation, and energy.
[3]
Represents the average annualized total return for all reporting funds in the Lipper Global Infrastructure Funds Classification.