Revenue Recognition - Narrative (Details)	9 Months Ended
Sep. 30, 2026
Revenue from Contract with Customer [Abstract]
Percent of contract billed	100.00%
Past due period	30 days

Revenue From Contracts With Customers, Percent Billed Of Contract Value

No definition available.

Name:	zws_RevenueFromContractsWithCustomersPercentBilledOfContractValue
Namespace Prefix:	zws_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant