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Revenue Recognition (Details) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) revenue_source | Sep. 30, 2019 USD ($)
Revenue from External Customer [Line Items] |  |  |  |
Number of revenue sources | revenue_source |  |  | 2 |
Total revenues | $ 279.3 | $ 256.4 | $ 795.0 | $ 784.3
United States |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 148.9 | 131.9 | 403.6 | 400.9
Europe and the former Commonwealth of Independent States |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 49.1 | 51.1 | 156.1 | 163.8
Asia/Pacific (including China) |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 51.9 | 43.1 | 151.1 | 128.7
Latin America |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 13.5 | 13.0 | 38.9 | 39.9
Other foreign countries |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 15.9 | 17.3 | 45.3 | 51.0
Product revenues |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 262.4 | 238.7 | 741.1 | 728.4
Materials conversion revenues |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 15.0 | 15.2 | 46.8 | 47.8
Other revenues |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 1.9 | 2.5 | 7.1 | 8.1
AMS |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 138.9 | 126.1 | 394.6 | 373.3
AMS | United States |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 103.6 | 87.8 | 275.7 | 258.5
AMS | Europe and the former Commonwealth of Independent States |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 9.0 | 12.1 | 32.7 | 38.7
AMS | Asia/Pacific (including China) |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 21.9 | 20.7 | 68.3 | 58.4
AMS | Latin America |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 1.6 | 1.8 | 6.4 | 5.3
AMS | Other foreign countries |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 2.8 | 3.7 | 11.5 | 12.4
AMS | Product revenues |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 135.8 | 122.7 | 379.9 | 362.9
AMS | Materials conversion revenues |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 2.5 | 2.3 | 11.3 | 6.2
AMS | Other revenues |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 0.6 | 1.1 | 3.4 | 4.2
EP |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 140.4 | 130.3 | 400.4 | 411.0
EP | United States |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 45.3 | 44.1 | 127.9 | 142.4
EP | Europe and the former Commonwealth of Independent States |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 40.1 | 39.0 | 123.4 | 125.1
EP | Asia/Pacific (including China) |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 30.0 | 22.4 | 82.8 | 70.3
EP | Latin America |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 11.9 | 11.2 | 32.5 | 34.6
EP | Other foreign countries |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 13.1 | 13.6 | 33.8 | 38.6
EP | Product revenues |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 126.6 | 116.0 | 361.2 | 365.5
EP | Materials conversion revenues |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 12.5 | 12.9 | 35.5 | 41.6
EP | Other revenues |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | $ 1.3 | $ 1.4 | $ 3.7 | $ 3.9

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