Allego N.V. Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Related-party transactions - Summary of Transactions Between Related Parties (Detail)

v3.22.1

Related-party transactions - Summary of Transactions Between Related Parties (Detail) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of transactions between related parties [line items]
Interest expenses on shareholder loans	€ 8,162	€ 7,530	€ 5,568
Share-based payment expenses	(291,837)	(7,100)	0
Contract assets with related party	1,226	41
Contract liabilities with related party	(21,192)	(7,278)
Other current receivables from related party	232	95
Madeleine Charging B.V [Member]
Disclosure of transactions between related parties [line items]
Interest expenses on shareholder loans	8,162	7,530	5,568
Management fee	0	25	25
Reimbursement of advisory fees	1,868	1,400	0
Reimbursement of marketing expenses	0	1,568	0
Share-based payment expenses	291,837	7,100	0
Shareholder loans	(100,193)	(92,031)
Current receivables/(payable) from related party	106	31
Trade payable to related party	(140)	0
Opera Charging B.V [Member]
Disclosure of transactions between related parties [line items]
Current receivables/(payable) from related party	37	8
MegaE Group [Member]
Disclosure of transactions between related parties [line items]
Revenue from contracts with related party	23,974	10,702	8,739
Trade receivables from related party	26,449	18,648
Trade payable to related party	(1,599)	(23)
Contract assets with related party	277	0
Contract liabilities with related party	(2,291)	(4,449)
Other current receivables from related party	3	3
EV Cars [Member]
Disclosure of transactions between related parties [line items]
Revenue from contracts with related party	24,566	0	€ 0
Contract assets with related party	237	0
Contract liabilities with related party	(17,997)	0
Meridiam EM [Member]
Disclosure of transactions between related parties [line items]
Purchase option derivative	€ 27,200	€ 0

- Definition

Current receivables/(payable) from related party.

+ References

No definition available.

+ Details

Name:	allg_CurrentReceivablesPayableFromRelatedParty
Namespace Prefix:	allg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Interest expenses on shareholder loans

+ References

No definition available.

+ Details

Name:	allg_InterestExpensesOnShareholderLoans
Namespace Prefix:	allg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Management fee.

+ References

No definition available.

+ Details

Name:	allg_ManagementFee
Namespace Prefix:	allg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Purchase option derivative.

+ References

No definition available.

+ Details

Name:	allg_PurchaseOptionDerivative
Namespace Prefix:	allg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Reimbursement of advisory fees.

+ References

No definition available.

+ Details

Name:	allg_ReimbursementOfAdvisoryFees
Namespace Prefix:	allg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Reimbursement of marketing expenses.

+ References

No definition available.

+ Details

Name:	allg_ReimbursementOfMarketingExpenses
Namespace Prefix:	allg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Shareholder loans.

+ References

No definition available.

+ Details

Name:	allg_ShareholderLoans
Namespace Prefix:	allg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amounts payable resulting from related party transactions. [Refer: Related parties [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 24
-IssueDate 2021-01-01
-Paragraph 20
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=24&code=ifrs-tx-2021-en-r&anchor=para_20&doctype=Standard
-URIDate 2021-03-24

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 24
-IssueDate 2021-01-01
-Paragraph 18
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=24&code=ifrs-tx-2021-en-r&anchor=para_18_b&doctype=Standard
-URIDate 2021-03-24

+ Details

Name:	ifrs-full_AmountsPayableRelatedPartyTransactions
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amounts receivable resulting from related party transactions. [Refer: Related parties [member]]

+ References

+ Details

Name:	ifrs-full_AmountsReceivableRelatedPartyTransactions
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of current contract assets. [Refer: Contract assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 15
-IssueDate 2021-01-01
-Paragraph 105
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2021-en-r&anchor=para_105&doctype=Standard
-URIDate 2021-03-24

+ Details

Name:	ifrs-full_CurrentContractAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of current contract liabilities. [Refer: Contract liabilities]

+ References

+ Details

Name:	ifrs-full_CurrentContractLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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_DisclosureOfTransactionsBetweenRelatedPartiesLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of expense arising from share-based payment transactions in which the goods or services received did not qualify for recognition as assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2021-01-01
-Paragraph 51
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_51_a&doctype=Standard
-URIDate 2021-03-24

+ Details

Name:	ifrs-full_ExpenseFromSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of current other receivables. [Refer: Other receivables]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 78
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_78_b&doctype=Standard
-URIDate 2021-03-24

+ Details

Name:	ifrs-full_OtherCurrentReceivables
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of revenue arising from the rendering of services in related party transactions. [Refer: Revenue; Related parties [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 24
-IssueDate 2021-01-01
-Paragraph 21
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=24&code=ifrs-tx-2021-en-r&anchor=para_21_c&doctype=Standard
-URIDate 2021-03-24

+ Details

Name:	ifrs-full_RevenueFromRenderingOfServicesRelatedPartyTransactions
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=allg_MadeleineChargingB.vMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=allg_OperaChargingB.vMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=allg_MegaeGroupMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=allg_EvCarsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=allg_MeridiamEmMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: