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Segment and Geographic Area Information - Narrative (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 USD ($) | Sep. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Sep. 30, 2017 USD ($) | Jun. 30, 2017 USD ($) | Mar. 31, 2017 USD ($) | Dec. 31, 2018 USD ($) segment | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of operating segments | segment |  |  |  |  |  |  |  |  | 4 |  |
Export sales | $ 1,376.3 | $ 1,318.7 | $ 1,293.7 | $ 1,202.5 | $ 1,226.6 | $ 1,159.9 | $ 1,134.7 | $ 1,086.3 | $ 5,191.2 | $ 4,607.5 | $ 3,789.9
Asia |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Export sales |  |  |  |  |  |  |  |  | $ 349.9 | 325.4 | 302.7
Concentration risk percentage |  |  |  |  |  |  |  |  | 34.00% |  |
Europe |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Export sales |  |  |  |  |  |  |  |  | $ 680.0 | 596.2 | 508.0
Concentration risk percentage |  |  |  |  |  |  |  |  | 27.00% |  |
Canada |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Export sales |  |  |  |  |  |  |  |  | $ 211.3 | 187.1 | 157.6
Concentration risk percentage |  |  |  |  |  |  |  |  | 16.00% |  |
Middle East |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Export sales |  |  |  |  |  |  |  |  | $ 102.1 | 112.5 | 101.2
Concentration risk percentage |  |  |  |  |  |  |  |  | 13.00% |  |
Other |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration risk percentage |  |  |  |  |  |  |  |  | 10.00% |  |
Sales | Geographic Concentration Risk |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Export sales |  |  |  |  |  |  |  |  | $ 578.0 | $ 513.0 | $ 460.0
Concentration risk percentage |  |  |  |  |  |  |  |  | 4.00% |  |

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