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Revenue Recognition (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Revenue from External Customer [Line Items]                      
Total revenues $ 279.4 $ 279.3 $ 254.2 $ 261.5 $ 238.5 $ 256.4 $ 269.9 $ 258.0 $ 1,074.4 $ 1,022.8 $ 1,041.3
AMS                      
Revenue from External Customer [Line Items]                      
Total revenues                 543.5 477.2 467.9
EP                      
Revenue from External Customer [Line Items]                      
Total revenues                 530.9 545.6 573.4
United States                      
Revenue from External Customer [Line Items]                      
Total revenues                 538.6 514.1 513.4
United States | AMS                      
Revenue from External Customer [Line Items]                      
Total revenues                 376.7 331.3 320.1
United States | EP                      
Revenue from External Customer [Line Items]                      
Total revenues                 161.9 182.8 193.3
Europe and the former Commonwealth of Independent States                      
Revenue from External Customer [Line Items]                      
Total revenues                 229.7 218.4 260.8
Europe and the former Commonwealth of Independent States | AMS                      
Revenue from External Customer [Line Items]                      
Total revenues                 47.5 45.8 46.2
Europe and the former Commonwealth of Independent States | EP                      
Revenue from External Customer [Line Items]                      
Total revenues                 182.2 172.6 214.6
Asia/Pacific (including China)                      
Revenue from External Customer [Line Items]                      
Total revenues                 205.3 172.6 159.4
Asia/Pacific (including China) | AMS                      
Revenue from External Customer [Line Items]                      
Total revenues                 94.6 77.6 76.6
Asia/Pacific (including China) | EP                      
Revenue from External Customer [Line Items]                      
Total revenues                 110.7 95.0 82.8
Latin America                      
Revenue from External Customer [Line Items]                      
Total revenues                 52.9 53.2 53.5
Latin America | AMS                      
Revenue from External Customer [Line Items]                      
Total revenues                 9.3 7.6 10.0
Latin America | EP                      
Revenue from External Customer [Line Items]                      
Total revenues                 43.6 45.6 43.5
Other foreign countries                      
Revenue from External Customer [Line Items]                      
Total revenues                 47.9 64.5 54.2
Other foreign countries | AMS                      
Revenue from External Customer [Line Items]                      
Total revenues                 15.4 14.9 15.0
Other foreign countries | EP                      
Revenue from External Customer [Line Items]                      
Total revenues                 32.5 49.6 39.2
Product revenues                      
Revenue from External Customer [Line Items]                      
Total revenues                 996.2 947.0 955.6
Product revenues | AMS                      
Revenue from External Customer [Line Items]                      
Total revenues                 522.4 462.8 455.5
Product revenues | EP                      
Revenue from External Customer [Line Items]                      
Total revenues                 473.8 484.2 500.1
Materials conversion revenues                      
Revenue from External Customer [Line Items]                      
Total revenues                 66.3 65.3 76.6
Materials conversion revenues | AMS                      
Revenue from External Customer [Line Items]                      
Total revenues                 14.1 8.9 8.4
Materials conversion revenues | EP                      
Revenue from External Customer [Line Items]                      
Total revenues                 52.2 56.4 68.2
Other revenues                      
Revenue from External Customer [Line Items]                      
Total revenues                 11.9 10.5 9.1
Other revenues | AMS                      
Revenue from External Customer [Line Items]                      
Total revenues                 7.0 5.5 4.0
Other revenues | EP                      
Revenue from External Customer [Line Items]                      
Total revenues                 $ 4.9 $ 5.0 $ 5.1