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Revenue Disclosures - Changes in the Company's Contract Liability for Deferred Franchise and Development Fees (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($)
Change in Contract with Customer, Liability [Roll Forward]
Balance at December 31, 2020	$ 59,919
Recognized as revenue during the three months ended March 31, 2021	(3,354)
Fees deferred during the three months ended March 31, 2021	1,789
Balance at March 31, 2021	$ 58,354

X

- Definition

Change in Contract with Customer, Liability [Roll Forward]

+ References

No definition available.

+ Details

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

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- Definition

Contract with Customer, Liability, Period Increase (Decrease)

+ References

No definition available.

+ Details

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Balance Type:	credit
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X

- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130531-203044

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130532-203044

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- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045

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