Segment Information (Sales By Major Product Group) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenue from External Customer [Line Items]
Net sales	$ 714.2	$ 695.9	$ 702.5	$ 673.4	$ 681.6	$ 694.2	$ 712.2	$ 660.0	$ 2,786.0	$ 2,748.0	$ 2,740.5
Process Valves and Related Products [Member] | Fluid Handling [Member]
Revenue from External Customer [Line Items]
Net sales									640.1	619.2	681.2
Commercial Valves [Member] | Fluid Handling [Member]
Revenue from External Customer [Line Items]
Net sales									310.1	290.9	316.5
otherproducts [Member] | Fluid Handling [Member]
Revenue from External Customer [Line Items]
Net sales									92.3	89.4	93.7
Payment Acceptance and Dispensing Products [Member] [Member] | Payment and Merchandising Technologies [Member]
Revenue from External Customer [Line Items]
Net sales									575.9	511.8	496.1
Merchandising Equipment [Member] | Payment and Merchandising Technologies [Member]
Revenue from External Customer [Line Items]
Net sales									200.8	234.0	207.0
Commercial Original Equipment [Member] | Aerospace And Electronics [Member]
Revenue from External Customer [Line Items]
Net sales									346.1	354.9	349.3
Military and Other Original Equipment [Member] | Aerospace And Electronics [Member]
Revenue from External Customer [Line Items]
Net sales									159.0	200.3	152.6
Commercial Aftermarket Products [Member] | Aerospace And Electronics [Member]
Revenue from External Customer [Line Items]
Net sales									134.0	132.8	132.1
Military Aftermarket Products [Member] | Aerospace And Electronics [Member]
Revenue from External Customer [Line Items]
Net sales									52.3	57.7	57.1
FRP - Recreational Vehicles [Member] | Engineered Materials [Member]
Revenue from External Customer [Line Items]
Net sales									150.5	131.2	133.9
FRP - Building Products [Member] | Engineered Materials [Member]
Revenue from External Customer [Line Items]
Net sales									95.2	89.6	83.1
FRP - Transportation [Member] | Engineered Materials [Member]
Revenue from External Customer [Line Items]
Net sales									29.7	36.2	37.8
Outside [Member] | Fluid Handling [Member]
Revenue from External Customer [Line Items]
Net sales									1,042.5	999.5	1,091.3
Outside [Member] | Payment and Merchandising Technologies [Member]
Revenue from External Customer [Line Items]
Net sales									776.7	745.8	703.0
Outside [Member] | Aerospace And Electronics [Member]
Revenue from External Customer [Line Items]
Net sales									691.4	745.7	691.3
Outside [Member] | Engineered Materials [Member]
Revenue from External Customer [Line Items]
Net sales									$ 275.4	$ 257.0	$ 254.8