Operating Segments (Tables)

9 Months Ended

Sep. 30, 2015

Segment Reporting [Abstract]

Segment information

Segment information is as follows (in millions):

	Three Months Ended September 30, 2015
	Salt		Plant Nutrition		Corporate and Other (a)			Total
Sales to external customers	$	179.9	$	50.2	$	2.6		$	232.7
Intersegment sales	—		1.6		(1.6		)	—
Shipping and handling cost	48.5		4.7		—			53.2
Operating earnings (loss)	45.0		8.8		(13.0		)	40.8
Depreciation, depletion and amortization	11.1		7.6		0.9			19.6
Total assets (as of end of period)	898.2		568.9		61.6			1,528.7

	Three Months Ended September 30, 2014
	Salt		Plant Nutrition		Corporate and Other (a)			Total
Sales to external customers	$	175.4	$	62.7	$	2.4		$	240.5
Intersegment sales	0.3		1.5		(1.8		)	—
Shipping and handling cost	51.6		5.9		—			57.5
Operating earnings (loss) (b)	116.7		19.0		(12.7		)	123.0
Depreciation, depletion and amortization	11.4		7.1		1.5			20.0
Total assets (as of end of period)	970.1		517.7		58.7			1,546.5

	Nine Months Ended September 30, 2015
	Salt		Plant Nutrition		Corporate and Other (a)			Total
Sales to external customers	$	612.9	$	187.9	$	8.6		$	809.4
Intersegment sales	0.1		5.1		(5.2		)	—
Shipping and handling cost	178.1		17.8		—			195.9
Operating earnings (loss)	143.1		46.4		(40.0		)	149.5
Depreciation, depletion and amortization	32.9		21.7		3.2			57.8

	Nine Months Ended September 30, 2014
	Salt		Plant Nutrition		Corporate and Other (a)			Total
Sales to external customers	$	647.3	$	194.4	$	7.4		$	849.1
Intersegment sales	0.7		4.7		(5.4		)	—
Shipping and handling cost	211.7		21.3		—			233.0
Operating earnings (loss) (b)	187.0		53.2		(36.8		)	203.4
Depreciation, depletion and amortization	33.5		20.0		3.7			57.2

(a) Corporate and Other includes corporate entities, records management operations and other incidental operations and eliminations.  Operating earnings (loss) for corporate and other includes indirect corporate overhead including costs for general corporate governance and oversight, as well as costs for the human resources, information technology and finance functions.

(b) Includes a gain of $82.3 million in the salt segment and $1.0 million in corporate and other resulting from an insurance settlement related to a tornado at its salt facilities in Goderich, Ontario in August 2011.