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Organization and Summary of Significant Accounting Policies - Inventories (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Inventory [Line Items]    
Raw materials and work-in-progress $ 276.2 $ 310.4
Finished goods 70.4 83.7
Gross inventories 346.6 394.1
Inventory valuation reserves (23.4) (20.5)
Inventories, net $ 323.2 $ 373.6