John Hancock International Growth Fund Fees and Expenses - Class 1 [Member] - John Hancock International Growth Fund |
Mar. 31, 2026 |
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| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | <span style="color:#000000;font-family:Arial Narrow;font-size:10pt;font-weight:bold;">Fees and expenses</span> |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay indirectly if shares of the fund are held by an exempt separate account of certain John Hancock insurance companies that fund exempt group annuity contracts issued by those insurance companies to qualified retirement plans. They are based on expenses incurred during the fund’s most recent fiscal year expressed as a percentage of the fund’s average net assets during the year. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. The fees and expenses do not reflect fees and expenses of any separate account that may use the fund as its underlying investment option and would be higher if they did. |
| Shareholder Fees Caption [Optional Text] | <span style="color:#000000;font-family:Arial Narrow;font-size:8pt;font-weight:bold;margin-left:0.0pt;">Shareholder fees (%) </span><span style="color:#000000;font-family:Arial Narrow;font-size:8pt;margin-left:0.0pt;">(fees paid directly from your investment)</span> |
| Operating Expenses Caption [Optional Text] | <span style="color:#000000;font-family:Arial Narrow;font-size:8pt;font-weight:bold;margin-left:0.0pt;">Annual fund operating expenses (%) </span><span style="color:#000000;font-family:Arial Narrow;font-size:8pt;margin-left:0.0pt;">(expenses that you pay each year as a percentage of the value of your investment)</span> |
| Expense Example [Heading] | <span style="color:#000000;font-family:Arial Narrow;font-size:10pt;font-weight:bold;">Expense example</span> |
| Expense Example Narrative [Text Block] | This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be: |
| Portfolio Turnover [Heading] | <span style="color:#000000;font-family:Arial Narrow;font-size:10pt;font-weight:bold;">Portfolio turnover</span> |
| Portfolio Turnover [Text Block] | The fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund’s performance. During its most recent fiscal year, the fund’s portfolio turnover rate was 72% of the average value of its portfolio. |
| Portfolio Turnover, Rate | 72.00% |