Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013 item	Apr. 01, 2012	Dec. 31, 2012
Segment Information
Number of geographic segments	3
Segment information
Net sales	$ 362.1	$ 361.2
Operating income (loss)	28.3	26.6
Interest income	0.1	0.2
Interest expense	(6.0)	(6.2)
Other income, net		0.9
Income from continuing operations before income taxes	22.4	21.5
Capital Expenditures	11.0	4.9
Depreciation and Amortization	12.4	12.5
Identifiable Assets (at end of period)	1,698.1	1,748.9	1,709.0
Property, plant and equipment, net (at end of period)	222.2	224.0	223.6
Intersegment sales	45.6	35.1
Number of product categories	4
Residential & commercial flow control
Segment information
Net sales	200.4	198.2
HVAC & gas
Segment information
Net sales	107.7	109.7
Drains & water re-use
Segment information
Net sales	33.9	33.8
Water quality
Segment information
Net sales	20.1	19.5
Discontinued operations
Segment information
Identifiable Assets (at end of period)		14.3
Reportable Segments
Segment information
Operating income (loss)	37.5	34.1
North America
Segment information
Net sales	213.0	207.0
Operating income (loss)	24.0	19.9
Capital Expenditures	8.2	2.6
Depreciation and Amortization	5.0	4.7
Identifiable Assets (at end of period)	810.8	847.2
Property, plant and equipment, net (at end of period)	85.2	75.2
Intersegment sales	1.3	1.4
Assets held for sale		4.4
North America | U.S.
Segment information
Net sales	192.8	187.0
Property, plant and equipment, net (at end of period)	79.9	69.2
EMEA
Segment information
Net sales	142.4	149.2
Operating income (loss)	10.6	12.8
Capital Expenditures	2.2	2.2
Depreciation and Amortization	6.7	7.3
Identifiable Assets (at end of period)	795.5	808.3
Property, plant and equipment, net (at end of period)	122.2	134.1
Intersegment sales	2.7	2.6
Asia
Segment information
Net sales	6.7	5.0
Operating income (loss)	2.9	1.4
Capital Expenditures	0.6	0.1
Depreciation and Amortization	0.7	0.5
Identifiable Assets (at end of period)	91.8	79.1
Property, plant and equipment, net (at end of period)	14.8	14.7
Intersegment sales	41.6	31.1
Corporate
Segment information
Operating income (loss)	$ (9.2)	$ (7.5)