John Hancock Investment Grade Bond Fund Expense Example, No Redemption - John Hancock Investment Grade Bond Fund Classes A C I R2 R4 and R6 [Member] - John Hancock Investment Grade Bond Fund - Class C |
May 31, 2026
USD ($)
|
|---|---|
| Prospectus [Line Items] | |
| Expense Example, No Redemption, 1 Year | $ 152 |
| Expense Example, No Redemption, 3 Years | 484 |
| Expense Example, No Redemption, 5 Years | 839 |
| Expense Example, No Redemption, 10 Years | $ 1,638 |