v3.26.3
Shareholder Report, Average Annual Return (Details) 74200180200_Putnam Global Technology Fund_Class Y_TSR Annual {Class Y}
 12 Months Ended 60 Months Ended 120 Months Ended
Aug. 31, 2026
Aug. 31, 2026
Aug. 31, 2026
Class Y      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Class Y    
Without Sales Load [Member] | Class Y      
Average Annual Return [Line Items]      
Average Annual Return, Percent 46.16% 16.36% 24.21%
MSCI All Country World Index-NR [Member]      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name MSCI All Country World Index-NR    
Average Annual Return, Percent 22.35% 10.88% 12.58%
Putnam Global Technology Linked Benchmark [Member]      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Putnam Global Technology Linked Benchmark    
Average Annual Return, Percent [1] 43.95% 19.16% 23.97%
MSCI ACWI Information Technology Index-NR [Member]      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name MSCI ACWI Information Technology Index-NR    
Average Annual Return, Percent 43.95% 18.99% 23.60%
[1]
† The Putnam Global Technology Linked Benchmark represents the performance of the MSCI World Information Technology Index-NR through March 31, 2022, and the performance of the MSCI ACWI Information Technology Index-NR thereafter.