John Hancock High Yield Fund Average Annual Total Returns - John Hancock Bond Trust Class NAV [Member] |
12 Months Ended | 60 Months Ended | 66 Months Ended | 120 Months Ended |
|---|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2024 |
Dec. 31, 2024 |
Dec. 31, 2024 |
|
| Bloomberg U.S. Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes)[Member] | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 1.25% | (0.33%) | 0.19% | 1.35% |
| ICE BofA U.S. High Yield Index (reflects no deduction for fees, expenses, or taxes)[Member] | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 8.20% | 4.04% | 5.08% | |
| Class NAV | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 6.88% | 3.35% | 4.43% | |
| Class NAV | After Taxes on Distributions | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 4.16% | 0.93% | 1.85% | |
| Class NAV | After Taxes on Distributions and Sales | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 4.02% | 1.48% | 2.21% |