Stockholders' Deficit - Schedule of Repurchase Agreements (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2025	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Class of Stock [Line Items]
Stock repurchased during period, value	$ 60.1	$ 12.0	$ 26.1
2022 Repurchase Program
Class of Stock [Line Items]
Stock repurchased during period (in shares)	2,352,636	269,621	446,189	1,149,589
Cumulative repurchases (in shares)	4,218,035
Stock repurchased during period, value	$ 60.1	$ 12.0	$ 26.1	$ 78.7
Cumulative repurchases	176.8
Remaining value of shares that may be repurchased under the 2022 Repurchase Program	$ 73.2

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References + Details

- Definition

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References + Details

Dine Brands Global, Inc. 10-K