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3. Intangible Assets, Goodwill and Other Intangible Assets (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Finite-Lived Intangible Assets, Net [Abstract]      
Purchase Price $ 565.7   $ 576.7
Accumulated Amortization (404.9)   (409.1)
Net Carrying Amount 160.8   167.6
Amortization [Abstract]      
Amortization expense 6.3 $ 7.2  
Intangible Assets, Gross (Excluding Goodwill) $ 652.0   $ 663.0
Customer Relationships [Member]      
Acquired Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Remaining Amortization Period 5 years 2 months 4 days   5 years 3 months 7 days
Finite-Lived Intangible Assets, Net [Abstract]      
Purchase Price $ 110.6   $ 111.8
Accumulated Amortization (91.2)   (90.7)
Net Carrying Amount $ 19.4   $ 21.1
Know How [Member]      
Acquired Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Remaining Amortization Period 3 years 6 months   3 years 9 months
Finite-Lived Intangible Assets, Net [Abstract]      
Purchase Price $ 169.1   $ 171.6
Accumulated Amortization (153.5)   (154.9)
Net Carrying Amount $ 15.6   $ 16.7
Developed Technology Rights [Member]      
Acquired Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Remaining Amortization Period 13 years 3 months 10 days   13 years 5 months 1 day
Finite-Lived Intangible Assets, Net [Abstract]      
Purchase Price $ 214.1   $ 215.6
Accumulated Amortization (116.8)   (115.6)
Net Carrying Amount $ 97.3   $ 100.0
Licensing Agreements [Member]      
Acquired Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Remaining Amortization Period 6 years 6 months 21 days   6 years 9 months 14 days
Finite-Lived Intangible Assets, Net [Abstract]      
Purchase Price $ 59.2   $ 64.9
Accumulated Amortization (35.9)   (40.6)
Net Carrying Amount $ 23.3   $ 24.3
Trade Names [Member]      
Acquired Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Remaining Amortization Period 7 years 2 months 4 days   7 years 3 months 29 days
Finite-Lived Intangible Assets, Net [Abstract]      
Purchase Price $ 6.3   $ 6.3
Accumulated Amortization (4.4)   (4.4)
Net Carrying Amount $ 1.9   $ 1.9
Noncompete Agreements [Member]      
Acquired Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Remaining Amortization Period 3 years 7 months 6 days   3 years 9 months 10 days
Finite-Lived Intangible Assets, Net [Abstract]      
Purchase Price $ 6.4   $ 6.5
Accumulated Amortization (3.1)   (2.9)
Net Carrying Amount $ 3.3   $ 3.6
Other Intangible Assets [Member]      
Acquired Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Remaining Amortization Period  
In Process Research and Development [Member]      
Amortization [Abstract]      
Indefinite-lived Intangible Assets (Excluding Goodwill) $ 86.3   $ 86.3