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4. Intangible Assets, Goodwill and Other Intangible Assets (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Finite-Lived Intangible Assets, Net [Abstract]          
Purchase Price $ 496.3   $ 496.3   $ 443.2
Accumulated Amortization (311.5)   (311.5)   (281.6)
Net Carrying Amount 184.8   184.8   161.6
Amortization [Abstract]          
Amortization expense 8.7 $ 9.6 15.6 $ 19.0  
Customer Relationships [Member]          
Finite-Lived Intangible Assets, Net [Abstract]          
Purchase Price 90.0   90.0   84.4
Accumulated Amortization (59.5)   (59.5)   (52.8)
Net Carrying Amount 30.5   30.5   31.6
Know how [Member]          
Finite-Lived Intangible Assets, Net [Abstract]          
Purchase Price 190.2   190.2   182.6
Accumulated Amortization (149.2)   (149.2)   (136.9)
Net Carrying Amount 41.0   41.0   45.7
Developed Technology Rights [Member]          
Finite-Lived Intangible Assets, Net [Abstract]          
Purchase Price 129.8   129.8   125.9
Accumulated Amortization (63.3)   (63.3)   (56.3)
Net Carrying Amount 66.5   66.5   69.6
Licensing Agreements [Member]          
Finite-Lived Intangible Assets, Net [Abstract]          
Purchase Price 74.8   74.8   39.0
Accumulated Amortization (33.9)   (33.9)   (30.6)
Net Carrying Amount 40.9   40.9   8.4
Trade Names [Member]          
Finite-Lived Intangible Assets, Net [Abstract]          
Purchase Price 3.6   3.6   3.5
Accumulated Amortization (2.7)   (2.7)   (2.5)
Net Carrying Amount 0.9   0.9   1.0
Noncompete Agreements [Member]          
Finite-Lived Intangible Assets, Net [Abstract]          
Purchase Price 7.9   7.9   7.8
Accumulated Amortization (2.9)   (2.9)   (2.5)
Net Carrying Amount $ 5.0   $ 5.0   $ 5.3
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)     2 years   3 years
Minimum [Member] | Licensing Agreements [Member]          
Finite-Lived Intangible Assets, Net [Abstract]          
Average Remaining Life (years)     2 years   1 year
Minimum [Member] | Trade Names [Member]          
Finite-Lived Intangible Assets, Net [Abstract]          
Average Remaining Life (years)     4 years   4 years
Minimum [Member] | Noncompete Agreements [Member]          
Finite-Lived Intangible Assets, Net [Abstract]          
Average Remaining Life (years)     2 years   2 years
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)     8 years   8 years
Maximum [Member] | Know how [Member]          
Finite-Lived Intangible Assets, Net [Abstract]          
Average Remaining Life (years)     9 years   9 years
Maximum [Member] | Developed Technology Rights [Member]          
Finite-Lived Intangible Assets, Net [Abstract]          
Average Remaining Life (years)     12 years   12 years
Maximum [Member] | Licensing Agreements [Member]          
Finite-Lived Intangible Assets, Net [Abstract]          
Average Remaining Life (years)     14 years   9 years
Maximum [Member] | Trade Names [Member]          
Finite-Lived Intangible Assets, Net [Abstract]          
Average Remaining Life (years)     7 years   8 years
Maximum [Member] | Noncompete Agreements [Member]          
Finite-Lived Intangible Assets, Net [Abstract]          
Average Remaining Life (years)     9 years   9 years
Maximum [Member] | Other Intangible Assets [Member]          
Finite-Lived Intangible Assets, Net [Abstract]          
Average Remaining Life (years)     0 years   0 years