Segment Information (Details) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015 USD ($)	Sep. 27, 2015 USD ($)	Jun. 28, 2015 USD ($)	Mar. 29, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 28, 2014 USD ($)	Jun. 29, 2014 USD ($)	Mar. 30, 2014 USD ($)	Dec. 31, 2015 USD ($) item	Dec. 31, 2014 USD ($) item	Dec. 31, 2013 USD ($)
Segment Information
Number of geographic segments | item									3	3
Segment information
Net Sales	$ 358.3	$ 366.3	$ 386.9	$ 356.2	$ 376.5	$ 376.0	$ 396.0	$ 365.2	$ 1,467.7	$ 1,513.7	$ 1,473.5
Consolidated operating (loss) income									(90.1)	105.4	111.5
Interest income									1.0	0.7	0.6
Interest expense									(24.3)	(19.9)	(21.5)
Other income (expense), net									2.4	(3.1)	(2.8)
(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES									(111.0)	83.1	87.8
Identifiable assets (at end of period)	1,692.8				1,948.0				1,692.8	1,948.0	1,740.2
Property, plant and equipment, net (at end of period)	184.4				203.3				184.4	203.3	219.9
Capital Expenditures									27.7	23.7	27.7
Depreciation and Amortization									$ 52.5	48.1	48.9
Charges related to Pension Plan and SERP benefit obligations		$ 59.7
Number of product categories | item									4
Residential & commercial flow control
Segment information
Net Sales									$ 831.1	930.3	907.7
HVAC & gas
Segment information
Net Sales									425.1	356.2	348.8
Drains & water re-use
Segment information
Net Sales									131.0	144.0	140.0
Water quality
Segment information
Net Sales									80.5	83.2	77.0
Reportable segments
Segment information
Consolidated operating (loss) income									10.8	141.3	140.6
Corporate
Segment information
Consolidated operating (loss) income									(100.9)	(35.9)	(29.1)
Charges related to Pension Plan and SERP benefit obligations									59.7
Intersegment sales
Segment information
Net Sales									128.9	174.9	186.5
Americas
Segment information
Net Sales									978.5	926.8	878.5
Identifiable assets (at end of period)	972.7				1,014.8				972.7	1,014.8	787.9
Property, plant and equipment, net (at end of period)	88.6				90.1				88.6	90.1	85.8
Capital Expenditures									19.0	10.9	18.0
Depreciation and Amortization									29.0	20.1	20.5
Americas | U.S.
Segment information
Net Sales									909.2	849.0	788.7
Property, plant and equipment, net (at end of period)	85.2				86.0				85.2	86.0	81.1
Americas | Reportable segments
Segment information
Consolidated operating (loss) income									109.9	110.3	84.0
Americas | Intersegment sales
Segment information
Net Sales									8.2	6.3	5.4
EMEA
Segment information
Net Sales									445.5	546.4	562.2
Identifiable assets (at end of period)	607.7				787.5				607.7	787.5	869.6
Property, plant and equipment, net (at end of period)	82.3				100.1				82.3	100.1	119.8
Capital Expenditures									7.5	11.6	8.5
Depreciation and Amortization									21.1	25.8	26.0
EMEA | Reportable segments
Segment information
Consolidated operating (loss) income									(98.6)	37.5	46.9
EMEA | Intersegment sales
Segment information
Net Sales									9.8	13.3	10.2
Asia Pacific
Segment information
Net Sales									43.7	40.5	32.8
Identifiable assets (at end of period)	112.4				145.7				112.4	145.7	82.7
Property, plant and equipment, net (at end of period)	$ 13.5				$ 13.1				13.5	13.1	14.3
Capital Expenditures									1.2	1.2	1.2
Depreciation and Amortization									2.3	2.2	2.4
Asia Pacific | Reportable segments
Segment information
Consolidated operating (loss) income									(0.5)	(6.5)	9.7
Asia Pacific | Intersegment sales
Segment information
Net Sales									$ 110.9	$ 155.3	$ 170.9