Fixed asset investments - Joint venture (Details) |
12 Months Ended | |
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Aug. 12, 2020 |
Sep. 30, 2021 |
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| Arqit Limited | ||
| Disclosure of joint ventures [line items] | ||
| Percentage of ownership interest in subsidiary | 100.00% | |
| Arqit Inc. | ||
| Disclosure of joint ventures [line items] | ||
| Percentage of ownership interest in subsidiary | 100.00% | |
| Arqit LLC | ||
| Disclosure of joint ventures [line items] | ||
| Percentage of ownership interest in subsidiary | 100.00% | |
| Quantum Keep Limited | ||
| Disclosure of joint ventures [line items] | ||
| Ownership interest in joint venture | 50.00% | 50.00% |
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. No definition available.
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- Definition The proportion of ownership interest in a joint venture attributable to the entity. [Refer: Joint ventures [member]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The proportion of ownership interest in a subsidiary attributable to the entity. [Refer: Subsidiaries [member]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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