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Revenue Recognition (Details) $ in Millions	3 Months Ended
	Apr. 01, 2018 USD ($)
Disaggregation of Revenue
Revenue	$ 378.5
Americas
Disaggregation of Revenue
Revenue	241.1
Europe
Disaggregation of Revenue
Revenue	123.0
APMEA
Disaggregation of Revenue
Revenue	14.4
Residential & commercial flow control
Disaggregation of Revenue
Revenue	196.6
Residential & commercial flow control | Americas
Disaggregation of Revenue
Revenue	139.9
Residential & commercial flow control | Europe
Disaggregation of Revenue
Revenue	47.2
Residential & commercial flow control | APMEA
Disaggregation of Revenue
Revenue	9.5
HVAC & gas
Disaggregation of Revenue
Revenue	120.7
HVAC & gas | Americas
Disaggregation of Revenue
Revenue	62.5
HVAC & gas | Europe
Disaggregation of Revenue
Revenue	53.9
HVAC & gas | APMEA
Disaggregation of Revenue
Revenue	4.3
Drains & water re-use
Disaggregation of Revenue
Revenue	38.4
Drains & water re-use | Americas
Disaggregation of Revenue
Revenue	16.5
Drains & water re-use | Europe
Disaggregation of Revenue
Revenue	21.6
Drains & water re-use | APMEA
Disaggregation of Revenue
Revenue	0.3
Water quality
Disaggregation of Revenue
Revenue	22.8
Water quality | Americas
Disaggregation of Revenue
Revenue	22.2
Water quality | Europe
Disaggregation of Revenue
Revenue	0.3
Water quality | APMEA
Disaggregation of Revenue
Revenue	0.3
Wholesale
Disaggregation of Revenue
Revenue	233.2
Wholesale | Americas
Disaggregation of Revenue
Revenue	136.6
Wholesale | Europe
Disaggregation of Revenue
Revenue	82.7
Wholesale | APMEA
Disaggregation of Revenue
Revenue	13.9
OEM
Disaggregation of Revenue
Revenue	59.1
OEM | Americas
Disaggregation of Revenue
Revenue	19.1
OEM | Europe
Disaggregation of Revenue
Revenue	39.5
OEM | APMEA
Disaggregation of Revenue
Revenue	0.5
Specialty
Disaggregation of Revenue
Revenue	67.6
Specialty | Americas
Disaggregation of Revenue
Revenue	67.6
DIY
Disaggregation of Revenue
Revenue	18.6
DIY | Americas
Disaggregation of Revenue
Revenue	17.8
DIY | Europe
Disaggregation of Revenue
Revenue	$ 0.8

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