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Lease - Narrative (Details)	6 Months Ended
	Jun. 30, 2025
Bottom of range
Leases [Line Items]
Lease term	2 years
Top of range
Leases [Line Items]
Lease term	10 years

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- Definition

Leases [Line Items]

+ References

No definition available.

+ Details

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Namespace Prefix:	ddi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Lessee, Lease Term

+ References

No definition available.

+ Details

Name:	ddi_LesseeLeaseTerm
Namespace Prefix:	ddi_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: