XML 158 R146.htm IDEA: XBRL DOCUMENT
v3.23.1

Financial instruments-Fair values and risk management - Additional information (Details) | Dec. 31, 2022
--- | ---
Debt securities [member] | Risk-adjusted discount rate |
Disclosure of significant unobservable inputs used in fair value measurement of liabilities [line items] |
Significant unobservable inputs | 15.9
Preference Shares Liabilities, Conversion Feature |
Disclosure of significant unobservable inputs used in fair value measurement of liabilities [line items] |
Significant unobservable inputs | 12
Preference Shares Liabilities, Conversion Feature | Expected volatility |
Disclosure of significant unobservable inputs used in fair value measurement of liabilities [line items] |
Significant unobservable inputs | 41.03

X
- 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
Name: | ifrs-full_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfLiabilitiesLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The value of significant unobservable input used in the measurement of the fair value of liabilities. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2022-03-24 -Paragraph 93 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2022-en-r&anchor=para_93_d&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_SignificantUnobservableInputLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | ifrs-full_ClassesOfFinancialLiabilitiesAxis=ifrs-full_DebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_UnobservableInputsAxis=pre_RiskAdjustedDiscountRateMeasurementInputMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialLiabilitiesAxis=pre_PreferenceSharesLiabilitiesConversionFeatureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_UnobservableInputsAxis=pre_ExpectedVolatilityMeasurementInputMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |