Segment Information (Details) $ in Millions	3 Months Ended
	Mar. 26, 2023 USD ($) segment	Mar. 27, 2022 USD ($)	Dec. 31, 2022 USD ($)
Segment information
Number of geographic segments | segment	3
Net sales	$ 471.7	$ 463.2
Operating income	84.7	71.5
Interest income	(0.4)	(0.1)
Interest expense	1.5	1.4
Other expense (income), net	0.1	0.3
INCOME BEFORE INCOME TAXES	83.5	69.9
Capital expenditures	5.1	5.6
Depreciation and amortization	10.0	10.3
Identifiable assets (at end of period)	1,990.0	1,903.3	$ 1,930.9
Property, plant and equipment, net (at end of period)	195.9	196.6	$ 196.8
Residential & commercial flow control
Segment information
Net sales	255.9	240.0
HVAC & gas
Segment information
Net sales	143.9	146.8
Drains & water re-use
Segment information
Net sales	43.1	46.4
Water quality
Segment information
Net sales	28.8	30.0
U.S.
Segment information
Net sales	304.3	294.2
Reportable segments
Segment information
Operating income	95.7	82.0
Corporate
Segment information
Operating income	(11.0)	(10.5)
Intersegment sales
Segment information
Net sales	29.7	33.6
Americas
Segment information
Net sales	323.2	313.9
Capital expenditures	3.2	3.5
Depreciation and amortization	7.1	7.0
Identifiable assets (at end of period)	1,257.2	1,174.5
Property, plant and equipment, net (at end of period)	122.7	120.5
Americas | Residential & commercial flow control
Segment information
Net sales	194.5	178.1
Americas | HVAC & gas
Segment information
Net sales	78.2	84.3
Americas | Drains & water re-use
Segment information
Net sales	22.8	22.8
Americas | Water quality
Segment information
Net sales	27.7	28.7
Americas | U.S.
Segment information
Property, plant and equipment, net (at end of period)	118.3	115.5
Americas | Reportable segments
Segment information
Operating income	72.5	57.9
Americas | Intersegment sales
Segment information
Net sales	2.0	3.0
Europe
Segment information
Net sales	128.3	129.9
Capital expenditures	1.8	2.1
Depreciation and amortization	2.4	2.7
Identifiable assets (at end of period)	592.0	581.8
Property, plant and equipment, net (at end of period)	69.0	71.4
Europe | Residential & commercial flow control
Segment information
Net sales	45.5	46.1
Europe | HVAC & gas
Segment information
Net sales	62.3	60.0
Europe | Drains & water re-use
Segment information
Net sales	19.6	22.8
Europe | Water quality
Segment information
Net sales	0.9	1.0
Europe | Reportable segments
Segment information
Operating income	19.2	21.1
Europe | Intersegment sales
Segment information
Net sales	5.6	7.1
APMEA
Segment information
Net sales	20.2	19.4
Capital expenditures	0.1
Depreciation and amortization	0.5	0.6
Identifiable assets (at end of period)	140.8	147.0
Property, plant and equipment, net (at end of period)	4.2	4.7
APMEA | Residential & commercial flow control
Segment information
Net sales	15.9	15.8
APMEA | HVAC & gas
Segment information
Net sales	3.4	2.5
APMEA | Drains & water re-use
Segment information
Net sales	0.7	0.8
APMEA | Water quality
Segment information
Net sales	0.2	0.3
APMEA | Reportable segments
Segment information
Operating income	4.0	3.0
APMEA | Intersegment sales
Segment information
Net sales	$ 22.1	$ 23.5