Segment Disclosures (Narrative) (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2014 Segment	Dec. 31, 2014 Segment
Segment reporting information
Number of business segments	2	5
Ammonia
Segment reporting information
Percentage of nitrogen		0.82
Number of complexes producing ammonia		7
Granular Urea
Segment reporting information
Percentage of nitrogen		0.46
UAN | Minimum
Segment reporting information
Percentage of nitrogen		0.28
UAN | Maximum
Segment reporting information
Percentage of nitrogen		0.32
Other | AN
Segment reporting information
Percentage of nitrogen		0.34
Other | DEF
Segment reporting information
Percentage of high-purity urea		0.325
Percentage of deionized water		0.675
Other | Forty Percent Concentration
Segment reporting information
Percentage of urea concentration within urea liquor		0.40
Other | Fifty Percent Concentration
Segment reporting information
Percentage of urea concentration within urea liquor		0.50
Other | Seventy Percent Concentration
Segment reporting information
Percentage of urea concentration within urea liquor		0.70