John Hancock High Yield Fund Average Annual Total Returns - John Hancock Bond Trust Class NAV [Member] |
12 Months Ended | 60 Months Ended | 78 Months Ended | 120 Months Ended |
|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| Bloomberg U.S. Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes)[Member] | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 7.30% | (0.36%) | 1.26% | 2.01% |
| ICE BofA U.S. High Yield Index (reflects no deduction for fees, expenses, or taxes)[Member] | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 8.50% | 4.50% | 6.45% | |
| Class NAV | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 7.92% | 3.94% | 5.69% | |
| Class NAV | After Taxes on Distributions | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 5.04% | 1.39% | 3.12% | |
| Class NAV | After Taxes on Distributions and Sales | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 4.96% | 1.92% | 3.26% |