Shareholder Report, Average Annual Return (Details) 74200177400_Putnam Global Health Care 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 | ||
| Average Annual Return, Percent | 20.40% | 6.30% | 9.99% |
| 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% |
| MSCI World Health Care Index-NR [Member] | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | MSCI World Health Care Index-NR | ||
| Average Annual Return, Percent | 19.65% | 4.54% | 9.04% |