John Hancock Investment Grade Bond Fund Annual Total Returns |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| John Hancock Investment Grade Bond Fund Classes A C I R2 R4 and R6 [Member] | John Hancock Investment Grade Bond Fund | Class A | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 7.36% | 1.58% | 5.80% | (14.36%) | (1.33%) | 8.29% | 8.59% | (0.39%) | 3.87% | 2.74% |