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%