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v3.22.4

Significant accounting policies (Narrative) (Details) | 9 Months Ended
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Sep. 30, 2020
Bottom of range [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Lease Term | 3 years
Top of range [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Lease Term | 6 years

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents about lease terms. + References No definition available. + Details
Name: | kwe_LeaseTerm
Namespace Prefix: | kwe_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |