Segment Information (Details) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016 USD ($)	Oct. 02, 2016 USD ($)	Jul. 03, 2016 USD ($)	Apr. 03, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 27, 2015 USD ($)	Jun. 28, 2015 USD ($)	Mar. 29, 2015 USD ($)	Dec. 31, 2016 USD ($) item	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($) item
Segment information
Number of geographic segments | item									3		3
Net Sales	$ 342.0	$ 341.1	$ 371.1	$ 344.2	$ 358.3	$ 366.3	$ 386.9	$ 356.2	$ 1,398.4	$ 1,467.7	$ 1,513.7
Consolidated operating income (loss)									145.0	(90.1)	105.4
Interest income									(1.0)	(1.0)	(0.7)
Interest expense									22.6	24.3	19.9
Other (income) expense, net									(4.4)	(2.4)	3.1
INCOME (LOSS) BEFORE INCOME TAXES									127.8	(111.0)	83.1
Identifiable assets (at end of period)	1,800.3				1,690.8				1,800.3	1,690.8	1,948.0
Property, plant and equipment, net (at end of period)	189.7				184.4				189.7	184.4	203.3
Capital Expenditures									36.0	27.7	23.7
Depreciation and Amortization									$ 51.2	52.4	48.1
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									$ 779.2	831.1	930.3
HVAC & gas
Segment information
Net Sales									408.1	425.1	356.2
Drains & water re-use
Segment information
Net Sales									132.3	131.0	144.0
Water quality
Segment information
Net Sales									78.8	80.5	83.2
Reportable segments
Segment information
Consolidated operating income (loss)									182.2	10.8	141.3
Corporate
Segment information
Consolidated operating income (loss)									(37.2)	(100.9)	(35.9)
Charges related to Pension Plan and SERP benefit obligations										59.7
Intersegment sales
Segment information
Net Sales									101.7	128.9	174.9
Americas
Segment information
Net Sales									900.9	978.5	926.8
Identifiable assets (at end of period)	1,093.7				970.7				1,093.7	970.7	1,014.8
Property, plant and equipment, net (at end of period)	106.2				88.6				106.2	88.6	90.1
Capital Expenditures									25.7	19.0	10.9
Depreciation and Amortization									28.8	29.0	20.1
Americas | U.S.
Segment information
Net Sales									839.2	909.2	849.0
Property, plant and equipment, net (at end of period)	102.5				85.2				102.5	85.2	86.0
Americas | Reportable segments
Segment information
Consolidated operating income (loss)									127.1	109.9	110.3
Americas | Intersegment sales
Segment information
Net Sales									12.0	8.2	6.3
EMEA
Segment information
Net Sales									442.3	445.5	546.4
Identifiable assets (at end of period)	582.0				607.7				582.0	607.7	787.5
Property, plant and equipment, net (at end of period)	75.9				82.3				75.9	82.3	100.1
Capital Expenditures									9.2	7.5	11.6
Depreciation and Amortization									19.4	21.1	25.8
EMEA | Reportable segments
Segment information
Consolidated operating income (loss)									40.8	(98.6)	37.5
EMEA | Intersegment sales
Segment information
Net Sales									11.8	9.8	13.3
Asia-Pacific
Segment information
Net Sales									55.2	43.7	40.5
Identifiable assets (at end of period)	124.6				112.4				124.6	112.4	145.7
Property, plant and equipment, net (at end of period)	$ 7.6				$ 13.5				7.6	13.5	13.1
Capital Expenditures									1.1	1.2	1.2
Depreciation and Amortization									3.0	2.3	2.2
Asia-Pacific | Reportable segments
Segment information
Consolidated operating income (loss)									14.3	(0.5)	(6.5)
Asia-Pacific | Intersegment sales
Segment information
Net Sales									$ 77.9	$ 110.9	$ 155.3