Revenue Narrative (Details)	3 Months Ended
	Mar. 31, 2018
Agriculture [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Average Payment Terms	1 year
Minimum [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Average Payment Terms	30 days
Maximum [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Average Payment Terms	60 days