Shareholder Report, Average Annual Return (Details) 190901_Boston Partners Small Cap Value II Fund_R6 Share Class_TSR Annual {R6 Share Class} |
2 Months Ended | 12 Months Ended |
|---|---|---|
Aug. 31, 2026 |
Aug. 31, 2026 |
|
| R6 Share Class | ||
| Average Annual Return [Line Items] | ||
| Line Graph and Table Measure Name | R6 Share Class | |
| Average Annual Return, Percent | 0.59% | |
| Russell 3000 Total Return Index [Member] | ||
| Average Annual Return [Line Items] | ||
| Line Graph and Table Measure Name | Russell 3000 Total Return Index | |
| Average Annual Return, Percent | 1.81% | |
| Russell 2000 Value Benchmark Total Return Index [Member] | ||
| Average Annual Return [Line Items] | ||
| Line Graph and Table Measure Name | Russell 2000 Value Benchmark Total Return Index | |
| Average Annual Return, Percent | 0.18% |