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N-2 - $ / shares	Dec. 13, 2023	Dec. 11, 2023
Cover [Abstract]
Entity Central Index Key	0000925683
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Entity Registrant Name	John Hancock Financial Opportunities Fund
General Description of Registrant [Abstract]
Share Price		$ 29.33
NAV Per Share		$ 28.03
Latest Premium (Discount) to NAV [Percent]		4.64%

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Net asset value per share or per unit of investments in certain entities that calculate net asset value per share. Includes, but is not limited to, by unit, membership interest, or other ownership interest. Investment includes, but is not limited to, investment in certain hedge funds, venture capital funds, private equity funds, real estate partnerships or funds. Excludes fair value disclosure.

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