RECEIVABLES SALES PROGRAM - Outstanding Receivables Sold (Details) - USD ($) $ in Millions	Sep. 27, 2026	Dec. 28, 2025
Receivables [Abstract]
Outstanding receivables sold	$ 33.2	$ 27.8
Receivables collected and not remitted to financial institutions, net of receivables sold and not settled with financial institutions	$ 0.2	$ 0.7

Receivables Sales Program, Receivables Collected and Not Remitted to Financial Institutions, Net

No definition available.

Name:	utz_ReceivablesSalesProgramReceivablesCollectedAndNotRemittedToFinancialInstitutionsNet
Namespace Prefix:	utz_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant