RECEIVABLES SALES PROGRAM - Receivables Sold (Details) $ in Millions	9 Months Ended
Sep. 27, 2026 USD ($)
Receivables [Abstract]
Receivables sold	$ 340.6
Receivables collected and remitted to financial institutions(1)	$ 172.1

Receivables Sales Program, Receivables Collected and Remitted

No definition available.

Name:	utz_ReceivablesSalesProgramReceivablesCollectedAndRemitted
Namespace Prefix:	utz_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration