John Hancock U.S. Growth Fund Performance Management - Class A C I R2 R4 R6 [Member] - John Hancock U.S. Growth Fund |
Mar. 31, 2026 |
|---|---|
| Prospectus [Line Items] | |
| Bar Chart and Performance Table [Heading] | <span style="color:#000000;font-family:Arial Narrow;font-size:10pt;font-weight:bold;">Past performance</span> |
| Performance Narrative [Text Block] | The following information illustrates the variability of the fund’s returns and provides some indication of the risks of investing in the fund by showing changes in the fund’s performance from year to year and by showing how the fund’s average annual returns compared with a broad-based securities market index. Past performance (before and after taxes) does not indicate future results. The Russell 1000 Growth Index shows how the fund’s performance compares against the returns of similar investments. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 800-225-5291, Monday to Thursday, 8:00 a.m.—7:00 p.m., and Friday, 8:00 a.m.—6:00 p.m., Eastern time.A note on performancePrior to the close of business on September 28, 2018, the fund was managed by a different subadvisor pursuant to different investment strategies, and thus, the performance presented prior to this date should not be attributed to the current subadvisor. The fund’s performance shown below might have differed materially had the current subadvisor managed the fund prior to the close of business on September 28, 2018.Please note that after-tax returns (shown for Class A shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan. After-tax returns for other share classes would vary. |
| Performance Past Does Not Indicate Future [Text] | <span style="color:#000000;font-family:Arial Narrow;font-size:9pt;">Past performance (before and after taxes) does not indicate future results.</span> |
| Performance Information Illustrates Variability of Returns [Text] | <span style="color:#000000;font-family:Arial Narrow;font-size:9pt;">The following information illustrates the variability of the fund’s returns and provides some indication of the risks of investing in the fund by showing changes in the fund’s performance from year to year and by showing how the fund’s average annual returns compared with a broad-based securities market index. </span> |
| Bar Chart Does Not Reflect Sales Loads [Text] | <span style="color:#000000;font-family:Arial Narrow;font-size:9pt;">sales charges are not reflected in the bar chart and returns would have been lower if they were</span> |
| Bar Chart [Heading] | <span style="color:#000000;font-family:Arial Narrow;font-size:9pt;font-weight:bold;">Calendar year total returns (%)—Class A </span><span style="color:#000000;font-family:Arial Narrow;font-size:9pt;">(</span><span style="color:#000000;font-family:Arial Narrow;font-size:9pt;">sales charges are not reflected in the bar chart and returns would have been lower if they were</span><span style="color:#000000;font-family:Arial Narrow;font-size:9pt;">)</span> |
| Bar Chart Closing [Text Block] | Year-to-date total return through:Q2 20265.96%Best quarter:Q2 202026.11%Worst quarter:Q2 2022-17.96% |
| Performance Table Heading | <span style="color:#000000;font-family:Arial Narrow;font-size:8pt;font-weight:bold;margin-left:0.0pt;">Average annual total returns (%)—as of 12/31/2025</span> |
| Performance Table Uses Highest Federal Rate | <span style="color:#000000;font-family:Arial Narrow;font-size:9pt;">Please note that after-tax returns (shown for Class A shares only)</span><span style="color:#000000;font-family:Arial Narrow;font-size:9pt;"> reflect the highest individual federal marginal income-tax rate in effect as of the date </span><span style="color:#000000;font-family:Arial Narrow;font-size:9pt;">provided and do not reflect any state or local taxes.</span> |
| Performance Table Not Relevant to Tax Deferred | <span style="color:#000000;font-family:Arial Narrow;font-size:9pt;"> Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an </span><span style="color:#000000;font-family:Arial Narrow;font-size:9pt;">IRA, 401(k), or other tax-advantaged investment plan.</span> |
| Performance Table One Class of after Tax Shown [Text] | <span style="color:#000000;font-family:Arial Narrow;font-size:9pt;">Please note that after-tax returns (shown for Class A shares only)</span> |
| Performance Availability Website Address [Text] | <span style="color:#000000;font-family:Arial Narrow;font-size:9pt;">jhinvestments.com</span> |
| Performance Availability Phone [Text] | <span style="color:#000000;font-family:Arial Narrow;font-size:9pt;">800-225-5291, Monday to Thursday, 8:00</span><span style="color:#000000;font-family:Arial Narrow;font-size:9pt;font-variant:small-caps;"> a.m.</span><span style="color:#000000;font-family:Arial Narrow;font-size:9pt;">—7:00</span><span style="color:#000000;font-family:Arial Narrow;font-size:9pt;font-variant:small-caps;"> p.m.</span><span style="color:#000000;font-family:Arial Narrow;font-size:9pt;">, and Friday, 8:00</span><span style="color:#000000;font-family:Arial Narrow;font-size:9pt;font-variant:small-caps;"> a.m.</span><span style="color:#000000;font-family:Arial Narrow;font-size:9pt;">—6:00</span><span style="color:#000000;font-family:Arial Narrow;font-size:9pt;font-variant:small-caps;"> p.m.</span><span style="color:#000000;font-family:Arial Narrow;font-size:9pt;">, Eastern time</span> |
| Class A | |
| Prospectus [Line Items] | |
| Year to Date Return, Label [Optional Text] | <span style="color:#000000;font-family:Arial Narrow;font-size:8pt;font-weight:bold;margin-left:0.0pt;">Year-to-date total return through:</span> |
| Bar Chart, Year to Date Return | 5.96% |
| Bar Chart, Year to Date Return, Date | Jun. 30, 2026 |
| Highest Quarterly Return, Label [Optional Text] | <span style="color:#000000;font-family:Arial Narrow;font-size:8pt;font-weight:bold;margin-left:0.0pt;">Best quarter:</span> |
| Highest Quarterly Return | 26.11% |
| Highest Quarterly Return, Date | Jun. 30, 2020 |
| Lowest Quarterly Return, Label [Optional Text] | <span style="color:#000000;font-family:Arial Narrow;font-size:8pt;font-weight:bold;margin-left:0.0pt;">Worst quarter:</span> |
| Lowest Quarterly Return | (17.96%) |
| Lowest Quarterly Return, Date | Jun. 30, 2022 |