Supplemental Balance Sheet Data - AOCI (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI, Balance at the beginning of the period			$ 311.6
Income (loss) from other comprehensive income items	$ 2.6	$ 3.6	6.5	$ (3.7)
Provision for income taxes	0.7	0.7	2.1	2.0
Comprehensive income	18.3	9.0	61.0	33.4
AOCI, Balance at the end of the period	352.5		352.5
Income tax benefit	(7.8)	$ (8.0)	(26.9)	(25.8)
Accumulated other comprehensive income (loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Cost of products sold and selling, general and administrative expenses			5.5	5.4
Income tax benefit			2.1	$ 2.0
Unrealized foreign currency translation gain (loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI, Balance at the beginning of the period			(20.8)
Other comprehensive income before reclassifications			0.9
Amounts reclassified from AOCI			0.0
Income (loss) from other comprehensive income items			0.9
Provision for income taxes			0.0
Comprehensive income			0.9
AOCI, Balance at the end of the period	(19.9)		(19.9)
Net gain (loss) from pension and other postretirement liabilities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI, Balance at the beginning of the period			(57.5)
Other comprehensive income before reclassifications			0.0
Amounts reclassified from AOCI			5.5
Income (loss) from other comprehensive income items			5.5
Provision for income taxes			2.1
Comprehensive income			3.4
AOCI, Balance at the end of the period	(54.1)		(54.1)
Unrealized gain on “available-for-sale” securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI, Balance at the beginning of the period			0.0
Other comprehensive income before reclassifications			0.1
Amounts reclassified from AOCI			0.0
Income (loss) from other comprehensive income items			0.1
Provision for income taxes			0.0
Comprehensive income			0.1
AOCI, Balance at the end of the period	0.1		0.1
Accumulated other comprehensive income (loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI, Balance at the beginning of the period			(78.3)
Other comprehensive income before reclassifications			1.0
Amounts reclassified from AOCI			5.5
Income (loss) from other comprehensive income items			6.5
Provision for income taxes			2.1
Comprehensive income			4.4
AOCI, Balance at the end of the period	$ (73.9)		$ (73.9)