Janus Henderson International Dividend Fund Average Annual Total Returns - Class D Shares [Member] |
12 Months Ended | 60 Months Ended | 120 Months Ended | 161 Months Ended | |
|---|---|---|---|---|---|
Jun. 30, 2026 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| MSCI World ex-USA IndexSM (reflects no deduction for expenses, fees, or taxes, except foreign withholding taxes)[Member] | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 31.85% | 9.46% | 8.55% | 8.16% | |
| Class D | After Taxes on Distributions | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 26.53% | 9.83% | 7.98% | 7.90% | |
| Class D | After Taxes on Distributions and Sales | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 18.39% | 8.65% | 7.15% | 7.15% | |
| Class D | Return Before Taxes[Member] | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 29.24% | 11.08% | 8.94% | 8.85% | |
| Performance Inception Date | Aug. 01, 2012 |