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3. Intangible Assets, Goodwill and Other Intangible Assets (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Finite-Lived Intangible Assets, Net [Abstract]          
Purchase Price $ 552.6   $ 552.6   $ 576.7
Accumulated Amortization (399.2)   (399.2)   (409.1)
Net Carrying Amount 153.4   153.4   167.6
Amortization [Abstract]          
Amortization expense 6.3 $ 7.2 12.6 $ 14.4  
Intangible Assets, Gross (Excluding Goodwill) 638.9   $ 638.9   $ 663.0
Customer Relationships [Member]          
Acquired Finite-Lived Intangible Assets [Line Items]          
Finite-Lived Intangible Assets, Remaining Amortization Period     5 years 1 month 24 days   5 years 3 months 7 days
Finite-Lived Intangible Assets, Net [Abstract]          
Purchase Price 106.3   $ 106.3   $ 111.8
Accumulated Amortization (88.7)   (88.7)   (90.7)
Net Carrying Amount 17.6   $ 17.6   $ 21.1
Know How [Member]          
Acquired Finite-Lived Intangible Assets [Line Items]          
Finite-Lived Intangible Assets, Remaining Amortization Period     3 years 3 months   3 years 9 months
Finite-Lived Intangible Assets, Net [Abstract]          
Purchase Price 164.4   $ 164.4   $ 171.6
Accumulated Amortization (149.9)   (149.9)   (154.9)
Net Carrying Amount 14.5   $ 14.5   $ 16.7
Developed Technology Rights [Member]          
Acquired Finite-Lived Intangible Assets [Line Items]          
Finite-Lived Intangible Assets, Remaining Amortization Period     13 years 2 months 1 day   13 years 5 months 1 day
Finite-Lived Intangible Assets, Net [Abstract]          
Purchase Price 210.6   $ 210.6   $ 215.6
Accumulated Amortization (116.4)   (116.4)   (115.6)
Net Carrying Amount 94.2   $ 94.2   $ 100.0
Licensing Agreements [Member]          
Acquired Finite-Lived Intangible Assets [Line Items]          
Finite-Lived Intangible Assets, Remaining Amortization Period     6 years 3 months 29 days   6 years 9 months 14 days
Finite-Lived Intangible Assets, Net [Abstract]          
Purchase Price 58.8   $ 58.8   $ 64.9
Accumulated Amortization (36.5)   (36.5)   (40.6)
Net Carrying Amount 22.3   $ 22.3   $ 24.3
Trade Names [Member]          
Acquired Finite-Lived Intangible Assets [Line Items]          
Finite-Lived Intangible Assets, Remaining Amortization Period     7 years 7 days   7 years 3 months 29 days
Finite-Lived Intangible Assets, Net [Abstract]          
Purchase Price 6.1   $ 6.1   $ 6.3
Accumulated Amortization (4.3)   (4.3)   (4.4)
Net Carrying Amount 1.8   $ 1.8   $ 1.9
Noncompete Agreements [Member]          
Acquired Finite-Lived Intangible Assets [Line Items]          
Finite-Lived Intangible Assets, Remaining Amortization Period     3 years 5 months 1 day   3 years 9 months 10 days
Finite-Lived Intangible Assets, Net [Abstract]          
Purchase Price 6.4   $ 6.4   $ 6.5
Accumulated Amortization (3.4)   (3.4)   (2.9)
Net Carrying Amount 3.0   3.0   3.6
In Process Research and Development [Member]          
Amortization [Abstract]          
Indefinite-lived Intangible Assets (Excluding Goodwill) $ 86.3   $ 86.3   $ 86.3