3. Intangible Assets, Goodwill and Other Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Finite-Lived Intangible Assets, Net [Abstract]
Purchase Price	$ 501.9		$ 501.9		$ 509.0
Accumulated Amortization	(343.9)		(343.9)		(334.9)
Net Carrying Amount	158.0		158.0		174.1
Amortization [Abstract]
Amortization expense	7.4	$ 8.7	14.8	$ 15.6
Customer Relationships [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Purchase Price	89.6		89.6		92.3
Accumulated Amortization	(65.7)		(65.7)		(64.4)
Net Carrying Amount	23.9		23.9		27.9
Know how [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Purchase Price	192.3		192.3		194.9
Accumulated Amortization	(158.6)		(158.6)		(157.9)
Net Carrying Amount	33.7		33.7		37.0
Developed Technology Rights [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Purchase Price	131.8		131.8		133.3
Accumulated Amortization	(74.2)		(74.2)		(70.3)
Net Carrying Amount	57.6		57.6		63.0
Licensing Agreements [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Purchase Price	76.4		76.4		76.7
Accumulated Amortization	(38.5)		(38.5)		(36.0)
Net Carrying Amount	37.9		37.9		40.7
Trade Names [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Purchase Price	3.9		3.9		3.9
Accumulated Amortization	(3.2)		(3.2)		(3.0)
Net Carrying Amount	0.7		0.7		0.9
Noncompete Agreements [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Purchase Price	7.9		7.9		7.9
Accumulated Amortization	(3.7)		(3.7)		(3.3)
Net Carrying Amount	$ 4.2		$ 4.2		$ 4.6
Minimum [Member] | Customer Relationships [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Average Remaining Life (years)			1 year	1 year
Minimum [Member] | Know how [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Average Remaining Life (years)			1 year	1 year
Minimum [Member] | Developed Technology Rights [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Average Remaining Life (years)			3 years	1 year
Minimum [Member] | Licensing Agreements [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Average Remaining Life (years)			1 year	1 year
Minimum [Member] | Trade Names [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Average Remaining Life (years)			3 years	1 year
Minimum [Member] | Noncompete Agreements [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Average Remaining Life (years)			1 year	1 year
Minimum [Member] | Other Intangible Assets [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Average Remaining Life (years)			0 years	0 years
Maximum [Member] | Customer Relationships [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Average Remaining Life (years)			7 years	7 years
Maximum [Member] | Know how [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Average Remaining Life (years)			8 years	8 years
Maximum [Member] | Developed Technology Rights [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Average Remaining Life (years)			11 years	12 years
Maximum [Member] | Licensing Agreements [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Average Remaining Life (years)			11 years	12 years
Maximum [Member] | Trade Names [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Average Remaining Life (years)			6 years	6 years
Maximum [Member] | Noncompete Agreements [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Average Remaining Life (years)			8 years	8 years
Maximum [Member] | Other Intangible Assets [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Average Remaining Life (years)			0 years	0 years