XML 40 R29.htm IDEA: XBRL DOCUMENT v3.21.2
Revenue and Contracts with Customers (Revenue from External Customers by Geographic Areas) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Revenue $ 62.4 $ 75.7 $ 118.0 $ 120.7
Product [Member]        
Revenue 45.2 63.4 83.3 94.1
Product [Member] | United States        
Revenue 45.2 43.1 54.8 50.4
Product [Member] | Other Foreign        
Revenue $ 0.0 $ 20.3 $ 28.5 $ 43.7