SIGNIFICANT ACCOUNTING POLICIES - Exclusive Option Agreement (Details)	12 Months Ended
Dec. 31, 2022 CNY (¥) ¥ / shares
SIGNIFICANT ACCOUNTING POLICIES
Purchase price for equity interests in shenzhen futu under exclusive option agreement \| ¥ / shares	¥ 1.00
Threshold of shenzhen futu disposes of shenzhen futu's material assets without prior written consent of shen si \| ¥	¥ 500,000

Amount represents the material contract of value of assets under exclusive option agreement.

No definition available.

Name:	futu_MaterialContractOfValueOfAssetsUnderExclusiveOptionAgreement
Namespace Prefix:	futu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant