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Commitments and Pledges - Lease commitments (Details) € in Thousands	12 Months Ended
	Dec. 31, 2023 EUR (€) m²	Dec. 31, 2022 EUR (€)	Dec. 31, 2021 EUR (€)
Commitments and Pledges
Future lease payables under non-cancellable value and short-term leases contracted for at the balance sheet date but not recognized as liabilities	€ 6,074	€ 62	€ 18
Area of office space leased | m²	5,000
Biding period	6 years
Contract amount	€ 8,000
Deposit fee paid for lease contract	1,000
Less than 1 year
Commitments and Pledges
Future lease payables under non-cancellable value and short-term leases contracted for at the balance sheet date but not recognized as liabilities	1,090	53	€ 18
Between 1 and 2 years
Commitments and Pledges
Future lease payables under non-cancellable value and short-term leases contracted for at the balance sheet date but not recognized as liabilities	€ 4,984	€ 9

X

- Definition

Area of office space leased by the company.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

X

- Definition

Amount of deposit fee paid by the company for lease contract.

+ References

No definition available.

+ Details

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Namespace Prefix:	cdlr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

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

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X

- Definition

The amount future lease payables under non-cancellable value and short-term leases contracted for at the balance sheet date but not recognized as liabilities.

+ References

No definition available.

+ Details

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Namespace Prefix:	cdlr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The amount of lease contract commitment.

+ References

No definition available.

+ Details

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Namespace Prefix:	cdlr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The bididng period of lease contract commitment.

+ References

No definition available.

+ Details

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Namespace Prefix:	cdlr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

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X

- Details

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