v3.25.4
S000024247 [Member] Average Annual Total Returns
 12 Months Ended 60 Months Ended 120 Months Ended
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
MSCI All Country World Index-NR (index reflects no deduction for fees, expenses or taxes but are net of dividend tax withholding)      
Prospectus [Line Items]      
Average Annual Return, Percent 17.49% 10.06% 9.23%
MSCI ACWI Information Technology Index-NR (index reflects no deduction for fees, expenses or taxes but are net of dividend tax withholding)      
Prospectus [Line Items]      
Average Annual Return, Percent 31.59% 20.50% 19.16%
Putnam Global Technology Linked Benchmark (no deduction for fees, expenses or taxes)      
Prospectus [Line Items]      
Average Annual Return, Percent 31.59% 20.69% 19.50%
Class A      
Prospectus [Line Items]      
Average Annual Return, Percent 19.98% 18.72% 19.43%
Class A | After Taxes on Distributions      
Prospectus [Line Items]      
Average Annual Return, Percent 18.08% 15.76% 17.08%
Class A | After Taxes on Distributions and Sales      
Prospectus [Line Items]      
Average Annual Return, Percent 12.99% 14.05% 15.52%
Class C      
Prospectus [Line Items]      
Average Annual Return, Percent 25.34% 19.24% 19.42%
Class R      
Prospectus [Line Items]      
Average Annual Return, Percent 26.99% 19.84% 19.84%
Class Y      
Prospectus [Line Items]      
Average Annual Return, Percent 27.62% 20.44% 20.44%
Class R6      
Prospectus [Line Items]      
Average Annual Return, Percent [1] 27.75% 20.57% 20.53%
[1] Performance for class R6 shares prior to their inception (5/22/18) is derived from the historical performance of class Y shares and has not been adjusted for the lower investor servicing fees applicable to class R6 shares; had it been adjusted, returns would have been higher.