Segment Information (Details) $ in Millions	3 Months Ended
	Mar. 27, 2022 USD ($)	Mar. 27, 2022 USD ($) segment	Mar. 27, 2022 USD ($) item	Mar. 28, 2021 USD ($)	Dec. 31, 2021 USD ($)
Segment information
Number of geographic segments		3	3
Net sales	$ 463.2			$ 413.3
Operating income	71.5			59.6
Interest income	(0.1)
Interest expense	1.4			2.0
Other expense (income), net	0.3			(0.3)
INCOME BEFORE INCOME TAXES	69.9			57.9
Capital expenditures	5.6			4.9
Depreciation and amortization	10.3			11.8
Identifiable assets (at end of period)	1,903.3	$ 1,903.3	$ 1,903.3	1,784.4	$ 1,855.6
Property, plant and equipment, net (at end of period)	196.6	196.6	196.6	205.8	$ 200.7
Residential & commercial flow control
Segment information
Net sales	240.0			224.2
HVAC & gas
Segment information
Net sales	146.8			122.4
Drains & water re-use
Segment information
Net sales	46.4			39.3
Water quality
Segment information
Net sales	30.0			27.4
U.S.
Segment information
Net sales	294.2			254.4
Reportable segments
Segment information
Operating income	82.0			70.3
Corporate
Segment information
Operating income	(10.5)			(10.7)
Intersegment sales
Segment information
Net sales	33.6			36.4
Americas
Segment information
Net sales	313.9			272.8
Capital expenditures	3.5			2.5
Depreciation and amortization	7.0			7.7
Identifiable assets (at end of period)	1,174.5	1,174.5	1,174.5	1,105.0
Property, plant and equipment, net (at end of period)	120.5	120.5	120.5	120.3
Americas | Residential & commercial flow control
Segment information
Net sales	178.1			162.3
Americas | HVAC & gas
Segment information
Net sales	84.3			65.9
Americas | Drains & water re-use
Segment information
Net sales	22.8			18.6
Americas | Water quality
Segment information
Net sales	28.7			26.0
Americas | U.S.
Segment information
Property, plant and equipment, net (at end of period)	115.5	115.5	115.5	116.2
Americas | Reportable segments
Segment information
Operating income	57.9			48.5
Americas | Intersegment sales
Segment information
Net sales	3.0			2.5
Europe
Segment information
Net sales	129.9			122.9
Capital expenditures	2.1			2.4
Depreciation and amortization	2.7			3.3
Identifiable assets (at end of period)	581.8	581.8	581.8	549.4
Property, plant and equipment, net (at end of period)	71.4	71.4	71.4	80.4
Europe | Residential & commercial flow control
Segment information
Net sales	46.1			47.2
Europe | HVAC & gas
Segment information
Net sales	60.0			54.2
Europe | Drains & water re-use
Segment information
Net sales	22.8			20.3
Europe | Water quality
Segment information
Net sales	1.0			1.2
Europe | Reportable segments
Segment information
Operating income	21.1			19.5
Europe | Intersegment sales
Segment information
Net sales	7.1			7.6
APMEA
Segment information
Net sales	19.4			17.6
Depreciation and amortization	0.6			0.8
Identifiable assets (at end of period)	147.0	147.0	147.0	130.0
Property, plant and equipment, net (at end of period)	4.7	$ 4.7	$ 4.7	5.1
APMEA | Residential & commercial flow control
Segment information
Net sales	15.8			14.7
APMEA | HVAC & gas
Segment information
Net sales	2.5			2.3
APMEA | Drains & water re-use
Segment information
Net sales	0.8			0.4
APMEA | Water quality
Segment information
Net sales	0.3			0.2
APMEA | Reportable segments
Segment information
Operating income	3.0			2.3
APMEA | Intersegment sales
Segment information
Net sales	$ 23.5			$ 26.3