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

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

Material accounting policies - Additional Information (Detail)

Material accounting policies - Additional Information (Detail)				1 Months Ended	12 Months Ended
	Aug. 10, 2023	Dec. 19, 2022 EUR (€) remedy d instrument	Apr. 20, 2022	May 31, 2023	Dec. 31, 2023 EUR (€) performance_obligation associate	Dec. 31, 2022 EUR (€) instrument associate	Dec. 31, 2021 EUR (€) associate	Apr. 03, 2024 EUR (€)	Mar. 31, 2022 type	Dec. 31, 2020 EUR (€)
Disclosure Of Significant Accounting Policies [Line Items]
Equity					€ (79,322,000)	€ 27,758,000	€ (76,652,000)			€ (73,744,000)
Cash and cash equivalents					44,585,000	83,022,000	24,652,000			€ 8,274,000
Non-current portion of non-current borrowings					350,722,000	269,033,000
Lease liabilities					83,490,000	51,324,000
Trade and other current payables					76,948,000	56,390,000
Repayments of borrowings, classified as financing activities					€ 0	€ 23,403,000	€ 0
Number of associates \| associate					1	1	0
Reimbursements number of suppliers \| associate					1
Number of option types \| type									2
Number of performance obligations \| performance_obligation					2
RSU
Disclosure Of Significant Accounting Policies [Line Items]
Vesting period	1 year			3 years	3 years
Performance Options
Disclosure Of Significant Accounting Policies [Line Items]
Vesting period					3 years	2 years
Management Incentive Plan
Disclosure Of Significant Accounting Policies [Line Items]
Blocking period			18 months		18 months
Minimum \| Performance Options
Disclosure Of Significant Accounting Policies [Line Items]
Vesting period					2 years
Maximum \| Performance Options
Disclosure Of Significant Accounting Policies [Line Items]
Vesting period					3 years
Interest Rate Cap
Disclosure Of Significant Accounting Policies [Line Items]
Notional amount		€ 240,500,000				€ 181,487,000
Number of interest rates caps \| instrument		2				2
Renewed facility
Disclosure Of Significant Accounting Policies [Line Items]
Increasing total existing available facility		€ 230,000,000
Notional amount		€ 400,000,000
Cash and cash equivalents					€ 39,000,000
Covenant break remedy period		10 days
Covenant repair consecutive opportunities \| d		2
Covenant break total opportunities \| remedy		4
Derivatives to hedge by interest rate risk		67.00%				65.00%
Renewed facility \| Minimum
Disclosure Of Significant Accounting Policies [Line Items]
Strike price percentage		0.0150
Renewed facility \| Maximum
Disclosure Of Significant Accounting Policies [Line Items]
Strike price percentage		0.0343
Renewed facility \| Financing And Refinancing Capital Expenditures
Disclosure Of Significant Accounting Policies [Line Items]
Notional amount		€ 200,000,000
Renewed facility \| Issuance Of Guarantees And Letters Of Credit
Disclosure Of Significant Accounting Policies [Line Items]
Notional amount		€ 30,000,000
Testing period		6 months
Testing deferral period		12 months
Senior Debt Bank Facility
Disclosure Of Significant Accounting Policies [Line Items]
Repayments of borrowings, classified as financing activities		€ 170,000,000
Renewed facility \| More than one year
Disclosure Of Significant Accounting Policies [Line Items]
Undrawn borrowing facilities					8,390,000	€ 120,790,000
Renewed facility \| Issuance Of Guarantees And Letters Of Credit
Disclosure Of Significant Accounting Policies [Line Items]
Notional amount		€ 30,000,000
Renewed facility \| Issuance Of Guarantees And Letters Of Credit \| Entering into significant commitments or contingent liabilities \| Solar-EP III B.V
Disclosure Of Significant Accounting Policies [Line Items]
Notional amount								€ 2,059,000
Guarantee Facility \| More than one year
Disclosure Of Significant Accounting Policies [Line Items]
Undrawn borrowing facilities					€ 17,500,000