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Segment and Geographic Area Information - Narrative (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 USD ($) | Sep. 30, 2020 USD ($) | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Sep. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2020 USD ($) segment | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of reportable segments | segment |  |  |  |  |  |  |  |  | 4 |  |
Export sales | $ 1,505.3 | $ 1,366.1 | $ 1,305.0 | $ 1,350.7 | $ 1,394.8 | $ 1,354.5 | $ 1,330.3 | $ 1,287.2 | $ 5,527.1 | $ 5,366.8 | $ 5,191.2
Exports |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Export sales |  |  |  |  |  |  |  |  | 401.8 | 531.8 | 578.0
Asia |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Export sales |  |  |  |  |  |  |  |  | 237.8 | 315.3 | 349.9
Canada |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Export sales |  |  |  |  |  |  |  |  | 216.3 | 222.4 | 211.3
Europe |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Export sales |  |  |  |  |  |  |  |  | 625.6 | 646.5 | 680.0
Middle East |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Export sales |  |  |  |  |  |  |  |  | $ 100.7 | $ 103.6 | $ 102.1
Revenue | Geographic Concentration Risk | Asia | Exports |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration risk percentage |  |  |  |  |  |  |  |  | 26.00% |  |
Revenue | Geographic Concentration Risk | Canada | Exports |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration risk percentage |  |  |  |  |  |  |  |  | 25.00% |  |
Revenue | Geographic Concentration Risk | Europe | Exports |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration risk percentage |  |  |  |  |  |  |  |  | 18.00% |  |
Revenue | Geographic Concentration Risk | Middle East | Exports |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration risk percentage |  |  |  |  |  |  |  |  | 18.00% |  |
Revenue | Geographic Concentration Risk | Other | Exports |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration risk percentage |  |  |  |  |  |  |  |  | 13.00% |  |

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