Condensed Guarantor and Non-Guarantor Financial Information, Comprehensive Income Statements (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME
Revenues	$ 395.2	$ 388.0
Costs and expenses:
Cost of products sold, excluding depreciation and amortization and other items	315.1	316.7
Depreciation and amortization	11.9	10.5
Selling, general, administrative, research and development	25.2	23.6
Other operating charges, net	0.0	0.1
Total costs and expenses	352.2	350.9
Operating income	43.0	37.1
Other income (expense):
Interest expense	(5.7)	(5.6)
Other income, net	0.5	0.1
Income before income taxes	37.8	31.6
Income tax provision	(9.8)	(5.9)
Earnings in equity of subsidiaries	0.0	0.0
Net income	28.0	25.7
Comprehensive income	37.7	17.4
Consolidating Adjustments
CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME
Revenues	(19.4)	(22.4)
Costs and expenses:
Cost of products sold, excluding depreciation and amortization and other items	(18.9)	(21.8)
Depreciation and amortization	0.0	0.0
Selling, general, administrative, research and development	(0.5)	(0.7)
Other operating charges, net		0.0
Total costs and expenses	(19.4)	(22.5)
Operating income	0.0	0.1
Other income (expense):
Interest expense	0.1	0.1
Other income, net	(0.1)	(0.1)
Income before income taxes	0.0	0.1
Income tax provision	1.5	1.5
Earnings in equity of subsidiaries	(34.8)	(32.7)
Net income	(33.3)	(31.1)
Comprehensive income	(43.0)	(22.8)
Parent
CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME
Revenues	0.0	0.0
Costs and expenses:
Cost of products sold, excluding depreciation and amortization and other items	0.0	0.0
Depreciation and amortization	0.0	0.0
Selling, general, administrative, research and development	1.1	1.1
Other operating charges, net		0.0
Total costs and expenses	1.1	1.1
Operating income	(1.1)	(1.1)
Other income (expense):
Interest expense	(5.2)	(5.2)
Other income, net	0.0	0.0
Income before income taxes	(6.3)	(6.3)
Income tax provision	0.0	0.0
Earnings in equity of subsidiaries	34.3	32.0
Net income	28.0	25.7
Comprehensive income	37.7	17.4
Guarantor Subsidiaries
CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME
Revenues	385.7	377.9
Costs and expenses:
Cost of products sold, excluding depreciation and amortization and other items	309.0	309.4
Depreciation and amortization	10.9	9.9
Selling, general, administrative, research and development	22.2	21.3
Other operating charges, net		0.1
Total costs and expenses	342.1	340.7
Operating income	43.6	37.2
Other income (expense):
Interest expense	(0.6)	(0.5)
Other income, net	0.3	0.1
Income before income taxes	43.3	36.8
Income tax provision	(11.0)	(7.1)
Earnings in equity of subsidiaries	0.5	0.7
Net income	32.8	30.4
Comprehensive income	42.5	22.1
Non-Guarantor Subsidiaries
CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME
Revenues	28.9	32.5
Costs and expenses:
Cost of products sold, excluding depreciation and amortization and other items	25.0	29.1
Depreciation and amortization	1.0	0.6
Selling, general, administrative, research and development	2.4	1.9
Other operating charges, net		0.0
Total costs and expenses	28.4	31.6
Operating income	0.5	0.9
Other income (expense):
Interest expense	0.0	0.0
Other income, net	0.3	0.1
Income before income taxes	0.8	1.0
Income tax provision	(0.3)	(0.3)
Earnings in equity of subsidiaries	0.0	0.0
Net income	0.5	0.7
Comprehensive income	$ 0.5	$ 0.7