XML 81 R64.htm IDEA: XBRL DOCUMENT
v3.22.1

Other Operating Income, Net - Schedule of Other Operating Income, Net (Parenthetical) (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2021
April 1, 2019 to December 31, 2021 [Member] |
Other Income and Expenses [Line Items] |
Percentage of Value Added Tax Rate in Super Deduction | 10.00%

X
- Definition Other income and expenses. + References No definition available. + Details
Name: | bz_OtherIncomeAndExpensesLineItems
Namespace Prefix: | bz_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of value added tax rate in super deduction. + References No definition available. + Details
Name: | bz_PercentageOfValueAddedTaxRateInSuperDeduction
Namespace Prefix: | bz_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | bz_ValueAddedTaxInSuperDeductionPeriodAxis=bz_FromAprilOneTwoThousandAndNineteenToDecemberThirtyOneTwoThousandAndTwentyOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |