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Other Balance Sheet Details - Inventories (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Other Balance Sheet Details [Abstract]    
Raw materials $ 16.6 $ 14.1
Work in process 2.4 1.5
Finished goods 9.0 1.7
Total inventories $ 28.0 $ 17.3