Basis of Presentation Basis of Presentation - Additional Information (Details) $ in Millions	6 Months Ended
	Jun. 30, 2018 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Trade accounts receivable arising from contracts with customers	$ 558.9
Minimum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Payment terms	30 days
Timing between shipment and delivery	1 day
Maximum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Payment terms	90 days
Timing between shipment and delivery	45 days