Segment Disclosures (Tables)

12 Months Ended

Dec. 31, 2017

Segment Reporting [Abstract]

Summary of segment data for sales, cost of sales and gross margin

Segment data for sales, cost of sales and gross margin for 2017, 2016 and 2015 are presented in the tables below.

	Ammonia		Granular Urea(1)		UAN(1)		AN(1)		Other(1)		Consolidated
	(in millions)
Year ended December 31, 2017
Net sales	$	1,209	$	971	$	1,134	$	497	$	319	$	4,130
Cost of sales	1,071		856		1,055		446		272		3,700
Gross margin	$	138	$	115	$	79	$	51	$	47	430
Total other operating costs and expenses											210
Equity in earnings of operating affiliates											9
Operating earnings											$	229
Year ended December 31, 2016
Net sales	$	981	$	831	$	1,196	$	411	$	266	$	3,685
Cost of sales	715		584		920		409		217		2,845
Gross margin	$	266	$	247	$	276	$	2	$	49	840
Total other operating costs and expenses											561
Equity in losses of operating affiliates											(145		)
Operating earnings											$	134
Year ended December 31, 2015
Net sales	$	1,523	$	788	$	1,480	$	294	$	223	$	4,308
Cost of sales	884		469		955		291		162		2,761
Gross margin	$	639	$	319	$	525	$	3	$	61	1,547
Total other operating costs and expenses											319
Equity in losses of operating affiliates											(35		)
Operating earnings											$	1,193

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⁽¹⁾  The cost of ammonia that is upgraded into other products is transferred at cost into the upgraded product results.

Schedule of segment depreciation, depletion and amortization

	Ammonia		Granular Urea		UAN		AN		Other		Corporate		Consolidated
	(in millions)
Depreciation and amortization
Year ended December 31, 2017	$	183	$	246	$	265	$	85	$	57	$	47	$	883
Year ended December 31, 2016	$	96	$	112	$	247	$	93	$	46	$	84	$	678
Year ended December 31, 2015	$	95	$	51	$	192	$	66	$	35	$	41	$	480

Schedule of enterprise-wide data by geographic region

Enterprise-wide data by geographic region is as follows:

	Year ended December 31,
	2017		2016		2015
	(in millions)
Sales by geographic region (based on destination of shipments):
United States	$	2,851	$	2,728	$	3,485
Foreign:
Canada	352		349		490
United Kingdom	427		394		153
Other foreign	500		214		180
Total foreign	1,279		957		823
Consolidated	$	4,130	$	3,685	$	4,308

	December 31,
	2017		2016		2015
	(in millions)
Property, plant and equipment—net by geographic region:
United States	$	7,921	$	8,444	$	7,202
Foreign:
Canada	551		523		497
United Kingdom	703		685		840
Total foreign	1,254		1,208		1,337
Consolidated	$	9,175	$	9,652	$	8,539