Revenue Recognition - Additional Information (Details)	Apr. 03, 2021
Revenue From Contract With Customer [Abstract]
Percentage of revenue satisfied over time	3.00%

Revenue, performance obligation satisfied over time, percentage.

No definition available.

Name:	rezi_RevenuePerformanceObligationSatisfiedOverTimePercentage
Namespace Prefix:	rezi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant