Segment Information (Schedule Of Financial Information By Reportable Segment) (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
Segment Reporting Information [Line Items]
Business Combination, Integration Related Costs	$ 4.7	$ 0.5	$ 2.6						$ 0.0	$ 0.0	$ 7.2
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
Operating profit (loss)	90.9	$ 105.4	$ 109.0	$ 96.6	(91.6)	103.8	102.6	$ 85.5	401.9	200.3	372.9
Assets	3,593.5				3,428.0				3,593.5	3,428.0	3,336.9
Goodwill	1,206.9				1,149.2				1,206.9	1,149.2	1,167.9
Capital expenditures									49.0	51.5	39.6
Depreciation and amortization									72.7	67.4	67.0
Restructuring charges									13.0	0.0	7.8
Corporate Expense Asbestos Charge [Member]
Segment Reporting Information [Line Items]
Operating profit (loss)									0.0
Aerospace And Electronics [Member]
Segment Reporting Information [Line Items]
Operating profit (loss)									160.2	149.8	145.1
Assets	573.0				555.5				573.0	555.5	559.4
Goodwill	202.4				202.3				202.4	202.3	202.6
Capital expenditures									16.7	28.7	16.2
Depreciation and amortization									14.0	11.7	11.3
Engineered Materials [Member]
Segment Reporting Information [Line Items]
Operating profit (loss)									49.5	49.0	48.4
Assets	220.8				224.7				220.8	224.7	227.6
Goodwill	171.4				171.3				171.4	171.3	171.4
Capital expenditures									3.1	3.5	3.3
Depreciation and amortization									6.7	6.1	6.2
Fluid Handling [Member]
Segment Reporting Information [Line Items]
Operating profit (loss)									111.8	119.5	125.4
Assets	941.6				845.9				941.6	845.9	888.0
Goodwill	245.4				212.3				245.4	212.3	218.7
Capital expenditures									14.7	10.3	10.0
Depreciation and amortization									16.2	10.8	12.6
Payment and Merchandising Technologies [Member]
Segment Reporting Information [Line Items]
Operating profit (loss)									148.5	135.5	101.4
Assets	1,215.7				1,188.9				1,215.7	1,188.9	1,178.0
Goodwill	$ 587.7				$ 563.3				587.7	563.3	575.2
Capital expenditures									14.2	8.7	9.8
Depreciation and amortization									34.2	33.9	34.5
Outside [Member] | Aerospace And Electronics [Member]
Segment Reporting Information [Line Items]
Net sales									691.4	745.7	691.3
Outside [Member] | Engineered Materials [Member]
Segment Reporting Information [Line Items]
Net sales									275.4	257.0	254.8
Outside [Member] | Fluid Handling [Member]
Segment Reporting Information [Line Items]
Net sales									1,042.5	999.5	1,091.3
Outside [Member] | Payment and Merchandising Technologies [Member]
Segment Reporting Information [Line Items]
Net sales									$ 776.7	$ 745.8	$ 703.0
Huttig [Domain]
Segment Reporting Information [Line Items]
Litigation Settlement, Amount						$ 5.0	$ 5.0