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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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