Annual report pursuant to Section 13 and 15(d)

Inventories Inventory Write Down (Details)

v3.20.1
Inventories Inventory Write Down (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Inventory [Line Items]      
Inventory Write-down $ 13.6 $ 0.0 $ 0.0