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NON-CONTROLLING INTERESTS - Weighted Average Ownership Percentages (Details)	12 Months Ended
	Dec. 31, 2025	Dec. 25, 2024	Dec. 27, 2023
Noncontrolling Interest [Abstract]
Non-controlling interest holders' weighted average ownership percentages	5.70%	6.20%	6.70%

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- Definition

Noncontrolling Interest, Weighted Average Ownership Percentage

+ References

No definition available.

+ Details

Name:	shak_NoncontrollingInterestWeightedAverageOwnershipPercentage
Namespace Prefix:	shak_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

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