John Hancock Global Climate Action Fund Average Annual Total Returns - Class A C R6 [Member] |
12 Months Ended | 24 Months Ended | |
|---|---|---|---|
Mar. 31, 2026 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| MSCI World Index (reflects no deduction for fees, expenses, or taxes, except foreign withholding taxes on dividends)[Member] | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 21.09% | 19.85% | |
| Class A | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 8.37% | 12.49% | |
| Performance Inception Date | Dec. 20, 2023 | ||
| Class A | After Taxes on Distributions | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 6.05% | 9.91% | |
| Class A | After Taxes on Distributions and Sales | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 5.72% | 8.73% | |
| Class C | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 13.08% | 15.39% | |
| Class R6 | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 14.08% | 15.39% |