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Goodwill and Other Intangible Assets (Tables)
 6 Months Ended
Jun. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Intangible Assets The gross carrying value and accumulated amortization for each major class of intangible assets are as follows:
June 30, 2021December 31, 2020
(in millions)Gross Carrying
Amount		Accumulated
Amortization		Gross Carrying
Amount		Accumulated
Amortization
Amortized intangible assets:
Trademarks$2.0 $0.4 $1.0 $0.4 
Patents40.8 38.4 40.8 36.1 
Customer relationships39.7 6.7 12.0 5.2 
Developed technology41.7 9.8 36.5 6.7 
Other2.4 1.0 1.8 0.7 
Total126.6 56.3 92.1 49.1 
Unamortized intangible assets:
Trademarks32.0 32.0 
IPR&D (1)
3.7 3.7 
Total35.7 35.7 
Total intangible assets, net$106.0 $78.7 
Schedule of Future Amortization Expense Amortization expense for the next five years, based on current definite-lived intangible balances, is estimated to be as follows:
(in millions)
Q3-Q4 2021$8.6 
202211.8 
202311.2 
202411.2 
202510.8