Goodwill and Other Intangible Assets - Intangible Assets and Amortization Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Jul. 01, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 543.6		$ 543.6			$ 529.2
Accumulated amortization	319.8		319.8			290.9
Intangible assets, net	255.8		$ 255.8			270.3
Schedule of Impaired Intangible Assets [Table Text Block]			0.4
Amortization expense	11.1	$ 10.6	$ 31.0	$ 32.2
Trademarks
Finite-Lived Intangible Assets [Line Items]
Unamortized intangible assets, gross carrying amount	32.0		32.0			32.0
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	7.1		7.1			7.5
Accumulated amortization	2.1		2.1			1.9
Patents
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	50.4		50.4			50.0
Accumulated amortization	16.5		16.5			12.3
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	389.0		389.0			404.6
Accumulated amortization	230.4		230.4			210.3
Unpatented Technologies
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	92.5		92.5			65.5
Accumulated amortization	67.3		67.3			64.8
Other (1)
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	4.6		4.6			1.6
Accumulated amortization	$ 3.5		$ 3.5			$ 1.6
Audience, Inc.
Finite-Lived Intangible Assets [Line Items]
Identified intangible assets					$ 25.9