John Hancock Global Climate Action Fund Expense Example - Class I [Member] - John Hancock Global Climate Action Fund - Class I	Mar. 31, 2025 USD ($)
Prospectus [Line Items]
Expense Example, with Redemption, 1 Year	$ 97
Expense Example, with Redemption, 3 Years	897
Expense Example, with Redemption, 5 Years	1,717
Expense Example, with Redemption, 10 Years	$ 3,854

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