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v3.20.1

Related Party Transactions - Additional Information (Details) - CNY (¥) ¥ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Related Party Transactions |  |  |
Donations | ¥ 1.2 | ¥ 1.2 | ¥ 2.7

X
- Definition Donation Payments Made During Period + References No definition available. + Details
Name: | noah_DonationPaymentsMadeDuringPeriod
Namespace Prefix: | noah_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration