XML 66 R55.htm IDEA: XBRL DOCUMENT v3.21.2

Commitment and Contingencies (Details) $ in Millions	Sep. 29, 2021 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Purchase obligations	$ 18.1
Amount committed by the company	$ 5.7

X

- Definition

Purchase Obligation, Amount Committed by the Company

+ References

No definition available.

+ Details

Name:	denn_PurchaseObligationAmountCommittedByTheCompany
Namespace Prefix:	denn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.

+ References

No definition available.

+ Details

Name:	us-gaap_PurchaseObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant