10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

☑  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2019

or

☐  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from _______________________ to __________________________

Commission File Number 001-31921

Compass Minerals International, Inc.

(Exact name of registrant as specified in its charter)

Delaware	36-3972986
(State or other jurisdiction of  incorporation or organization)	(I.R.S. Employer Identification Number)

9900 West 109th Street

Suite 100

Overland Park, KS 66210

(913) 344-9200

(Address of principal executive offices, zip code and telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol	Name of each exchange on which registered
Common stock, $0.01 par value	CMP	The New York Stock Exchange

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such
reports), and (2) has been subject to such filing requirements for the past 90 days.	Yes	☑	No	☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period
that the registrant was required to submit and post such files)	Yes	☑	No	☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.
Large accelerated filer	☑	Accelerated filer	☐	Non-accelerated filer	☐	Smaller reporting company	☐
						Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☑

The number of shares outstanding of the registrant’s common stock, $0.01 par value per share, as of November 1, 2019, was 33,884,326 shares.

COMPASS MINERALS INTERNATIONAL, INC.

TABLE OF CONTENTS

		Page
	PART I. FINANCIAL INFORMATION
Item 1.	Financial Statements
	Consolidated Balance Sheets as of September 30, 2019 (unaudited) and December 31, 2018	2
	Consolidated Statements of Operations for the three and nine months ended September 30, 2019 and 2018 (unaudited)	3
	Consolidated Statements of Comprehensive (Loss) Income for the three and nine months ended September 30, 2019 and 2018 (unaudited)	4
	Consolidated Statements of Stockholders’ Equity for the three and nine months ended September 30, 2019 and 2018 (unaudited)	5
	Consolidated Statements of Cash Flows for the nine months ended September 30, 2019 and 2018 (unaudited)	7
	Notes to Consolidated Financial Statements (unaudited)	8
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	25
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	37
Item 4.	Controls and Procedures	37
	PART II. OTHER INFORMATION
Item 1.	Legal Proceedings	38
Item 1A.	Risk Factors	38
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	38
Item 3.	Defaults Upon Senior Securities	38
Item 4.	Mine Safety Disclosures	38
Item 5.	Other Information	38
Item 6.	Exhibits	39
SIGNATURES		40

1

PART I. FINANCIAL INFORMATION

Item 1.    Financial Statements

COMPASS MINERALS INTERNATIONAL, INC.

CONSOLIDATED BALANCE SHEETS

(in millions, except share data)

	(Unaudited)
	September 30, 2019			December 31, 2018
ASSETS
Current assets:
Cash and cash equivalents	$	23.9		$	27.0
Receivables, less allowance for doubtful accounts of $10.3 in 2019 and $9.9 in 2018	216.0			311.6
Inventories	337.1			266.6
Other	118.4			116.0
Total current assets	695.4			721.2
Property, plant and equipment, net	1,023.5			1,052.0
Intangible assets, net	104.2			115.9
Goodwill	332.1			350.8
Investment in equity method investee	24.3			24.5
Other	150.3			103.5
Total assets	$	2,329.8		$	2,367.9
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Current portion of long-term debt	$	50.9		$	43.5
Accounts payable	110.3			111.3
Accrued salaries and wages	34.1			31.8
Income taxes payable	4.0			32.1
Accrued interest	7.7			9.7
Accrued expenses and other current liabilities	70.9			54.9
Total current liabilities	277.9			283.3
Long-term debt, net of current portion	1,358.2			1,321.2
Deferred income taxes, net	89.1			100.8
Other noncurrent liabilities	145.1			122.4
Commitments and contingencies (Note 9)
Stockholders’ equity:
Common stock: $0.01 par value, 200,000,000 authorized shares; 35,367,264 issued shares	0.4			0.4
Additional paid-in capital	114.8			110.1
Treasury stock, at cost — 1,482,938 shares at September 30, 2019 and 1,513,808 shares at December 31, 2018	(3.2		)	(2.9		)
Retained earnings	576.0			643.5
Accumulated other comprehensive loss	(228.5		)	(210.9		)
Total stockholders’ equity	459.5			540.2
Total liabilities and stockholders’ equity	$	2,329.8		$	2,367.9

The accompanying notes are an integral part of the consolidated financial statements.

2

COMPASS MINERALS INTERNATIONAL, INC.

CONSOLIDATED STATEMENTS OF OPERATIONS

(Unaudited, in millions, except share and per share data)

	Three Months Ended September 30,						Nine Months Ended September 30,
	2019			2018			2019			2018
Sales	$	341.3		$	322.5		$	990.2		$	1,007.1
Shipping and handling cost	54.4			51.9			215.3			221.8
Product cost	210.5			199.2			580.1			606.0
Gross profit	76.4			71.4			194.8			179.3
Selling, general and administrative expenses	46.3			38.8			127.4			117.3
Operating earnings	30.1			32.6			67.4			62.0
Other expense (income):
Interest expense	17.7			15.9			50.7			44.5
Net earnings in equity investee	(0.4		)	(0.6		)	(0.4		)	(0.9		)
Other, net	(2.6		)	2.8			5.4			(0.4		)
Earnings before income taxes	15.4			14.5			11.7			18.8
Income tax expense	4.8			1.7			5.3			1.0
Net earnings	$	10.6		$	12.8		$	6.4		$	17.8
Basic net earnings per common share	$	0.31		$	0.37		$	0.17		$	0.52
Diluted net earnings per common share	$	0.31		$	0.37		$	0.17		$	0.51
Weighted-average common shares outstanding (in thousands):
Basic	33,884			33,851			33,880			33,846
Diluted	33,884			33,851			33,880			33,846

The accompanying notes are an integral part of the consolidated financial statements.

3

COMPASS MINERALS INTERNATIONAL, INC.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME

(Unaudited, in millions)

	Three Months Ended September 30,						Nine Months Ended September 30,
	2019			2018			2019			2018
Net earnings	$	10.6		$	12.8		$	6.4		$	17.8
Other comprehensive income (loss):
Unrealized gain from change in pension obligations, net of tax of $(0.0) in both the three and nine months ended September 30, 2019 and 2018, respectively	0.1			—			0.3			0.1
Unrealized gain on cash flow hedges, net of tax of $(0.1) and $(0.0) in the three and nine months ended September 30, 2019, respectively, and $(0.1) in both the three and nine months ended September 30, 2018	0.3			0.3			—			0.5
Cumulative translation adjustment	(50.7		)	(8.9		)	(17.9		)	(112.0		)
Comprehensive (loss) income	$	(39.7	)	$	4.2		$	(11.2	)	$	(93.6	)

The accompanying notes are an integral part of the consolidated financial statements.

4

COMPASS MINERALS INTERNATIONAL, INC.

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

For the three and nine months ended September 30, 2019

(Unaudited, in millions)

	Common Stock		Additional Paid-In Capital		Treasury Stock			Retained Earnings			Accumulated Other Comprehensive Loss			Total
Balance, December 31, 2018	$	0.4	$	110.1	$	(2.9	)	$	643.5		$	(210.9	)	$	540.2
Comprehensive income								7.6			14.7			22.3
Cumulative effect of change in accounting principle								(0.1		)				(0.1		)
Dividends on common stock ($0.72 per share)			0.1					(24.6		)				(24.5		)
Shares issued for stock units, net of shares withheld for taxes					(0.2		)							(0.2		)
Stock-based compensation			1.1											1.1
Balance, March 31, 2019	$	0.4	$	111.3	$	(3.1	)	$	626.4		$	(196.2	)	$	538.8
Comprehensive (loss) income								(11.8		)	18.0			6.2
Dividends on common stock ($0.72 per share)			0.1					(24.8		)				(24.7		)
Shares issued for stock units, net of shares withheld for taxes					(0.1		)							(0.1		)
Stock-based compensation			2.7											2.7
Balance, June 30, 2019	$	0.4	$	114.1	$	(3.2	)	$	589.8		$	(178.2	)	$	522.9
Comprehensive income (loss)								10.6			(50.3		)	(39.7		)
Dividends on common stock ($0.72 per share)			0.1					(24.4		)				(24.3		)
Stock-based compensation			0.6											0.6
Balance, September 30, 2019	$	0.4	$	114.8	$	(3.2	)	$	576.0		$	(228.5	)	$	459.5

5

COMPASS MINERALS INTERNATIONAL, INC.

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

For the three and nine months ended September 30, 2018

(Unaudited, in millions)

	Common Stock		Additional Paid-In Capital		Treasury Stock			Retained Earnings			Accumulated Other Comprehensive Loss			Total
Balance, December 31, 2017	$	0.4	$	102.5	$	(2.9	)	$	672.5		$	(77.9	)	$	694.6
Comprehensive income (loss)								12.6			(14.8		)	(2.2		)
Stranded tax effect from tax reform								0.2			(0.2		)	—
Dividends on common stock ($0.72 per share)			0.1					(24.5		)				(24.4		)
Stock-based compensation			1.1											1.1
Balance, March 31, 2018	$	0.4	$	103.7	$	(2.9	)	$	660.8		$	(92.9	)	$	669.1
Comprehensive loss								(7.6		)	(88.0		)	(95.6		)
Dividends on common stock ($0.72 per share)								(24.6		)				(24.6		)
Stock-based compensation			1.6											1.6
Balance, June 30, 2018	$	0.4	$	105.3	$	(2.9	)	$	628.6		$	(180.9	)	$	550.5
Comprehensive income (loss)								12.8			(8.6		)	4.2
Dividends on common stock ($0.72 per share)			0.1					(24.5		)				(24.4		)
Stock-based compensation			0.9											0.9
Balance, September 30, 2018	$	0.4	$	106.3	$	(2.9	)	$	616.9		$	(189.5	)	$	531.2

The accompanying notes are an integral part of the consolidated financial statements.

6

COMPASS MINERALS INTERNATIONAL, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited, in millions)

	Nine Months Ended September 30,
	2019			2018
Cash flows from operating activities:
Net earnings	$	6.4		$	17.8
Adjustments to reconcile net earnings to net cash flows provided by operating activities:
Depreciation, depletion and amortization	102.8			103.6
Finance fee amortization	2.1			1.6
Stock-based compensation	4.0			3.6
Deferred income taxes	(10.2		)	(0.3		)
Net earnings in equity method investee	(0.4		)	(0.9		)
Unrealized foreign exchange loss	2.0			9.5
Other, net	6.2			3.2
Changes in operating assets and liabilities:
Receivables	90.0			116.2
Inventories	(75.2		)	(61.1		)
Other assets	4.8			(36.0		)
Accounts payable and accrued expenses and other current liabilities	(26.3		)	8.3
Other liabilities	(14.8		)	(0.1		)
Net cash provided by operating activities	91.4			165.4
Cash flows from investing activities:
Capital expenditures	(71.6		)	(72.2		)
Other, net	(1.6		)	(2.3		)
Net cash used in investing activities	(73.2		)	(74.5		)
Cash flows from financing activities:
Proceeds from revolving credit facility borrowings	288.8			348.4
Principal payments on revolving credit facility borrowings	(235.4		)	(333.3		)
Proceeds from issuance of long-term debt	58.1			36.2
Principal payments on long-term debt	(62.2		)	(62.6		)
Dividends paid	(73.6		)	(73.4		)
Deferred financing costs	(0.3		)	(0.3		)
Shares withheld to satisfy employee tax obligations	(0.3		)	—
Other, net	(0.9		)	(0.7		)
Net cash used in financing activities	(25.8		)	(85.7		)
Effect of exchange rate changes on cash and cash equivalents	4.5			(5.7		)
Net change in cash and cash equivalents	(3.1		)	(0.5		)
Cash and cash equivalents, beginning of the year	27.0			36.6
Cash and cash equivalents, end of period	$	23.9		$	36.1

Supplemental cash flow information:
Interest paid, net of amounts capitalized	$	47.6	$	41.4
Income taxes paid, net of refunds	$	48.6	$	32.3

The accompanying notes are an integral part of the consolidated financial statements.

7

COMPASS MINERALS INTERNATIONAL, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1. Accounting Policies and Basis of Presentation:

Compass Minerals International, Inc. (“CMI”), through its subsidiaries (collectively, the “Company”), is a leading producer of essential minerals that solve nature’s challenges, including salt for winter roadway safety and other consumer, industrial and agricultural uses, specialty plant nutrition minerals that improve the quality and yield of crops, and specialty chemicals for water treatment and other industrial processes. The Company’s principal products are salt, consisting of sodium chloride and magnesium chloride; plant nutrients, consisting of sulfate of potash (“SOP”), secondary nutrients and micronutrients; and specialty chemicals. The Company also provides records management services to businesses located in the United Kingdom (the “U.K.”). The Company’s production sites are located in the United States (“U.S.”), Canada, Brazil and the U.K. Except where otherwise noted, references to North America include only the continental U.S. and Canada, and references to the U.K. include only England, Scotland and Wales. References to “Compass Minerals,” “our,” “us” and “we” refer to CMI and its consolidated subsidiaries.

CMI is a holding company with no significant operations other than those of its wholly-owned subsidiaries. The consolidated financial statements include the accounts of CMI and its wholly-owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation.

The Company uses the equity method of accounting for equity securities when it has significant influence or when it has more than a minor ownership interest or more than minor influence over an investee’s operations but does not have a controlling financial interest. Initial investments are recorded at cost (including certain transaction costs) and are adjusted by the Company’s share of the investees’ undistributed earnings and losses.

The accompanying unaudited consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. These unaudited consolidated financial statements should be read in conjunction with the consolidated financial statements of the Company for the year ended December 31, 2018, as filed with the Securities and Exchange Commission in its Annual Report on Form 10-K. In the opinion of management, all adjustments, consisting of normal recurring adjustments considered necessary for a fair presentation, have been included.

The Company experiences a substantial amount of seasonality in its sales with respect to its deicing salt products. As a result, sales and operating earnings are generally higher in the first and fourth quarters and lower during the second and third quarters of each year. In particular, sales of highway and consumer deicing salt and magnesium chloride products vary based on the severity of the winter conditions in areas where the products are used. Following industry practice in North America and the U.K., the Company seeks to stockpile sufficient quantities of deicing salt throughout the second, third and fourth quarters to meet the estimated requirements for the upcoming winter season. Production of deicing salt can also vary based on the severity or mildness of the preceding winter season. Due to the seasonal nature of the deicing product lines, operating results for the interim periods are not necessarily indicative of the results that may be expected for the full year.

The Company’s plant nutrition business is also seasonal. For example, the strongest demand for the Company’s plant nutrition products in Brazil typically occurs during the spring planting season. As a result, the Company and its customers generally build inventories during the low demand periods of the year to ensure timely product availability during the peak sales season. The seasonality of this demand results in the Company’s sales volumes and operating income for the Plant Nutrition South America segment usually being the highest during the third and fourth quarters of each year (as the spring planting season begins in September in Brazil).

Significant Accounting Policies

The Company’s significant accounting policies are detailed in “Note 2 – Summary of Significant Accounting Policies” within Item 8 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2018. Significant changes to these accounting policies as a result of adopting Accounting Standards Update (ASU) 2016-02, Leases (Topic 842), can be found in “Note 3 – Leases.”

8

Recent Accounting Pronouncements

In August 2018, the Financial Accounting Standards Board (the “FASB”) issued guidance to require customers in a cloud computing arrangement that is a service contract to follow the internal use software guidance to determine which implementation costs to capitalize as assets. The capitalized implementation costs related to these arrangements are required to be amortized over the term of the hosting arrangement. The guidance also clarifies the presentation requirements for these costs in an entity’s financial statements. The guidance is effective for periods beginning after December 15, 2019, and interim periods within those fiscal years. The Company does not expect this guidance to have a material impact on its consolidated financial statements.

In January 2017, the FASB issued guidance to simplify the accounting for goodwill impairment. The guidance removes Step 2 of the goodwill impairment test, which requires a hypothetical purchase price allocation. A goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. All other goodwill impairment guidance remains largely unchanged. The guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for annual and interim goodwill impairment testing dates after January 1, 2017. The Company is currently assessing the impact this guidance will have on its consolidated financial statements.

In June 2016, the FASB issued guidance for estimating credit losses on certain types of financial instruments, including trade receivables, by introducing an approach based on expected losses. The expected loss approach will require entities to incorporate considerations of historical information, current information and reasonable and supportable forecasts. The guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, requires a modified retrospective transition method and early adoption is permitted. The Company is currently assessing the impact this guidance will have on its consolidated financial statements.

2.    Revenue Recognition:

Nature of Products and Services

The Company’s Salt segment products include salt and magnesium chloride for use in road deicing and dust control, food processing, water softeners, and agricultural and industrial applications. The Company’s plant nutrition products include SOP, secondary nutrients, micronutrients and chemicals for the industrial chemical industry. In the U.K., the Company operates a records management business utilizing excavated areas of the Winsford salt mine with one other location in London, England.

Identifying the Contract

The Company accounts for a customer contract when there is approval and commitment from both parties, the rights of the parties and payment terms are identified, the contract has commercial substance and collectability of consideration is probable.

Identifying the Performance Obligations

At contract inception, the Company assesses the goods and services it has promised to its customers and identifies a performance obligation for each promise to transfer to the customer a distinct good or service (or bundle of goods or services). Determining whether products and services are considered distinct performance obligations that should be accounted for separately or aggregated together may require significant judgment.

Identifying and Allocating the Transaction Price

The Company’s revenues are measured based on consideration specified in the customer contract, net of any sales incentives and amounts collected on behalf of third parties such as sales taxes. In certain cases, the Company’s customer contracts may include promises to transfer multiple products and services to a customer. For multiple-element arrangements, the Company generally allocates the transaction price to each performance obligation in proportion to its stand-alone selling price.

When Performance Obligations Are Satisfied

The vast majority of the Company’s revenues are recognized at a point in time when the performance obligations are satisfied based upon transfer of control of the product or service to a customer. To determine when the control of goods is transferred, the Company typically assesses, among other things, the shipping terms of the contract, as shipping is an indicator of transfer of control. Some of the Company’s products are sold when the control of the goods transfers to the customer at the time of shipment. There are also instances when the Company provides shipping services to deliver its products. Shipping and handling costs that

9

occur before the customer obtains control of the goods are deemed to be fulfillment activities and are accounted for as fulfillment costs. The Company recognizes shipping and handling costs that are incurred after the customer obtains control of the goods as fulfillment costs which are accrued at the time of revenue recognition.

Significant Payment Terms

The customer contract states the final terms of the sale, including the description, quantity and price of each product or service purchased. Payment is typically due in full within 30 days of delivery. The Company does not adjust the consideration for the effects of a significant financing component if the Company expects, at contract inception, that the period between when the good or service is transferred to the customer and when the customer pays for that good or service will be one year or less.

Refunds, Returns and Warranties

The Company’s products are generally not sold with a right of return and the Company does not generally provide credits or incentives, which may be required to be accounted for as variable consideration when estimating the amount of revenue to be recognized. The Company uses historical experience to estimate accruals for refunds due to manufacturing or other defects.

See Note 10 for disaggregation of revenue by segment, type and geographical region.

3. Leases:

In February 2016, the FASB issued guidance which requires lessees to recognize on their balance sheet a right-of-use asset which represents a lessee’s right to use the underlying asset and a lease liability which represents a lessee’s obligation to make lease payments for the right to use the asset. In addition, the guidance requires expanded qualitative and quantitative disclosures. The Company has adopted this guidance beginning in the first quarter of 2019, using a modified retrospective transition method, which required the cumulative effect of this change in accounting of $0.1 million to be recorded as an adjustment to beginning retained earnings. The Company’s 2018 consolidated financial statements were not recast under the new guidance and therefore, these amounts are not presented. The Company elected the package of transition provisions available for existing contracts, which allowed entities to carryforward the historical assessment of whether the contract contained a lease and the lease classification.

The Company enters into leases for warehouses and depots, rail cars, vehicles, mobile equipment, office space and certain other types of property and equipment. The Company determines whether an arrangement is or contains a lease at the inception of the contract. The right-of-use asset and lease liability are recognized based on the present value of the future minimum lease payments over the estimated lease term. Lease expense for minimum lease payments is recognized on a straight-line basis over the lease term. The Company estimates its incremental borrowing rate for each lease based upon the estimated lease term, the type of asset and the location of the leased asset. The most significant judgments in the application of the FASB guidance include whether a contract contains a lease and the lease term.

Leases with an initial term of 12 months or less are not recorded on the Company’s Consolidated Balance Sheets. The Company recognizes lease expense for these short-term leases on a straight-line basis over the lease term. Many of the Company’s leases include one or more options to renew and extend the initial lease term. The exercise of lease renewal options is generally at the Company’s discretion. The lease term includes renewal periods in only those instances in which the Company determines it is reasonably assured of renewal.

The depreciable life of assets and leasehold improvements are limited by the expected lease term, unless there is a transfer of title or purchase option reasonably certain of exercise. In these instances, the assets are depreciated over the useful life of the asset.

The Company has elected the practical expedient available under the FASB guidance to not separate lease and nonlease components on all of its lease categories. As a result, many of the Company’s leases include variable payments for services (such as handling or storage) or payments based on the usage of the asset. In addition, certain of the Company’s lease agreements include rental payments that are adjusted periodically for inflation. The Company’s lease agreements do not contain any material residual value guarantees or any material restrictive covenants. The Company’s sublease income is immaterial.

10

The Company’s Consolidated Balance Sheets includes the following (in millions):

	Consolidated Balance Sheets Location	September 30, 2019
Assets
Operating lease assets	Other assets	$	39.9
Finance lease assets	Property, plant and equipment, net	5.8
Total leased assets		$	45.7
Liabilities
Current liabilities:
Operating	Accrued expenses and other current liabilities	$	13.4
Finance	Accrued expenses and other current liabilities	1.2
Noncurrent liabilities:
Operating	Other noncurrent liabilities	26.7
Finance	Other noncurrent liabilities	6.2
Total lease liabilities		$	47.5

The Company’s components of lease cost are as follows (in millions):

	Three Months Ended September 30, 2019		Nine Months Ended September 30, 2019
Finance lease cost:
Amortization of lease assets	$	0.3	$	0.9
Interest on lease liabilities	0.1		0.4
Operating lease cost	4.5		14.2
Variable lease cost(a)	3.6		13.6
Net lease cost	$	8.5	$	29.1

(a) Short-term leases are immaterial and included in variable lease cost.

Maturities of lease liabilities under the new guidance (“Topic 842”) are as follows (in millions):

Topic 842
September 30, 2019	Operating Leases			Finance Leases			Total
Remainder of 2019	$	4.6		$	0.5		$	5.1
2020	12.7			1.6			14.3
2021	7.4			1.2			8.6
2022	4.9			1.0			5.9
2023	3.9			1.0			4.9
After 2023	14.0			4.3			18.3
Total lease payments	47.5			9.6			57.1
Less: Interest	(7.4		)	(2.2		)	(9.6		)
Present value of lease liabilities	$	40.1		$	7.4		$	47.5

11

The Company’s annual aggregate future minimum annual rental payments under the previous guidance (“Topic 840”) as of December 31, 2018 were as follows (in millions):

Topic 840
December 31, 2018	Operating Leases		Finance Leases		Total
2019	$	16.4	$	2.3	$	18.7
2020	10.6		1.8		12.4
2021	5.7		1.3		7.0
2022	4.4		1.1		5.5
2023	3.6		1.1		4.7
After 2023	14.3		4.6		18.9
Total lease payments	$	55.0	$	12.2	$	67.2

Supplemental lease term and discount rate information related to leases is as follows:

	September 30, 2019
Weighted-average remaining lease term (years)
Operating leases	6.3
Finance leases	7.3
Weighted-average discount rate
Operating leases	4.7	%
Finance leases	7.5	%

Supplemental cash flow information related to leases is as follows (in millions):

	Nine Months Ended September 30, 2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$	14.2
Operating cash flows from finance leases	0.4
Financing cash flows from finance leases	0.9
Leased assets obtained in exchange for new operating lease liabilities	2.8
Leased assets obtained in exchange for new finance lease liabilities	0.1

4. Inventories:

Inventories consist of the following (in millions):

	September 30, 2019		December 31, 2018
Finished goods	$	271.0	$	202.2
Raw materials and supplies	66.1		64.4
Total inventories	$	337.1	$	266.6

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5. Property, Plant and Equipment, Net:

Property, plant and equipment, net, consists of the following (in millions):

	September 30, 2019			December 31, 2018
Land, buildings and structures, and leasehold improvements	$	585.2		$	580.7
Machinery and equipment	972.2			983.2
Office furniture and equipment	57.7			54.4
Mineral interests	169.1			168.1
Construction in progress	143.7			118.3
	1,927.9			1,904.7
Less accumulated depreciation and depletion	(904.4		)	(852.7		)
Property, plant and equipment, net	$	1,023.5		$	1,052.0

6. Goodwill and Intangible Assets, Net:

Amounts related to the Company’s amortization of intangible assets are as follows (in millions):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Aggregate amortization expense	$	3.3	$	3.5	$	10.3	$	11.4

Amounts related to the Company’s goodwill are as follows (in millions):

	September 30, 2019		December 31, 2018
Goodwill - Plant Nutrition North America Segment	$	54.3	$	52.6
Goodwill - Plant Nutrition South America Segment	272.0		292.3
Other	5.8		5.9
Total	$	332.1	$	350.8

The change in goodwill between December 31, 2018 and September 30, 2019 was due to the impact from translating foreign-denominated amounts to U.S. dollars.

7. Income Taxes:

The Company’s effective income tax rate differs from the U.S. statutory federal income tax rate primarily due to U.S. statutory depletion, state income taxes (net of federal tax benefit), foreign income, mining and withholding taxes, global intangible low-taxed income and interest expense recognition differences for book and tax purposes. The Company’s effective rate is impacted by permanent tax deductions which have a less favorable impact as pretax income increases.

The Company had $22.4 million and $27.2 million as of September 30, 2019 and December 31, 2018, respectively, of gross foreign federal net operating loss (“NOL”) carryforwards that have no expiration date. In addition, the Company had $1.2 million of gross foreign federal NOL carryforwards as of September 30, 2019 and December 31, 2018, which expire beginning in 2033 and $0.2 million of net operating tax-effected state NOL carryforwards as of September 30, 2019 and December 31, 2018, which expire beginning in 2027.

Canadian provincial tax authorities have challenged tax positions claimed by one of the Company’s Canadian subsidiaries and have issued tax reassessments for years 2002-2014. The reassessments are a result of ongoing audits and total $126.2 million, including interest, through September 30, 2019. The Company disputes these reassessments and will continue to work with the appropriate authorities in Canada to resolve the dispute. There is a reasonable possibility that the ultimate resolution of this dispute, and any related disputes for other open tax years, may be materially higher or lower than the amounts the Company has reserved for such disputes. In connection with this dispute, local regulations require the Company to post security with the tax authority

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until the dispute is resolved. The Company has posted collateral in the form of a $90.2 million performance bond and has paid $37.4 million to the Canadian tax authorities (most of which is recorded in other assets in the Consolidated Balance Sheets).

The Company expects that it will be required by local regulations to provide security for additional interest on the above unresolved disputed amounts and for any future reassessments issued by these Canadian tax authorities in the form of cash, letters of credit, performance bonds, asset liens or other arrangements agreeable with the tax authorities until the disputes are resolved.

The Company expects that the ultimate outcome of these matters will not have a material impact on its results of operations or financial condition. However, the Company can provide no assurance as to the ultimate outcome of these matters, and the impact could be material if they are not resolved in the Company’s favor. As of September 30, 2019, the Company believes it has adequately reserved for these reassessments.

Additionally, the Company has other uncertain tax positions as well as assessments and disputed positions with taxing authorities in its various jurisdictions, which are consistent with those matters disclosed in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018.

Settlements

In the fourth quarter of 2017, the Company, the Canadian Revenue Authority (“CRA”) and the U.S. Internal Revenue Service (“IRS”) reached a settlement agreement on transfer pricing issues for the Company’s 2007-2012 tax years. As a result of this settlement agreement, the Company recognized $13.8 million of tax expense in its 2017 Consolidated Statements of Operations related to the Company’s Canadian tax positions for the years 2007-2016. During 2018, in accordance with the settlement agreement, the Company’s U.S. subsidiary made intercompany cash payments of $85.7 million to its Canadian subsidiary and tax payments to Canadian taxing authorities of $17.5 million. Tax payments of $5.7 million were made during the first and second quarters of 2019, leaving an outstanding balance of $1.3 million as of September 30, 2019. Corresponding tax refunds of $3.4 million have been received as of September 30, 2019 from U.S. taxing authorities, with the remaining refund of approximately $19.5 million expected in late 2019 (recorded in other current assets in the Consolidated Balance Sheets).

In the fourth quarter of 2018, the Company, the CRA and the IRS reached a settlement agreement on transfer pricing and management fees as part of an advanced pricing agreement that covers tax years 2013-2021. The tax expense was previously recognized in 2017. During the second quarter of 2019, in accordance with the settlement agreement, the Company’s U.S. subsidiary made intercompany cash payments of $106.1 million to its Canadian subsidiary and tax payments to Canadian taxing authorities of $29.9 million. Corresponding tax refunds of $4.0 million were received during 2019 from U.S. taxing authorities, with the remaining $57.4 million expected in early 2020 (recorded in other current assets in its Consolidated Balance Sheets).

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8. Long-Term Debt:

Long-term debt consists of the following (in millions):

	September 30, 2019			December 31, 2018
Term Loans due July 2021	$	822.5		$	828.9
Revolving Credit Facility due July 2021	250.4			197.0
4.875% Senior Notes due July 2024	250.0			250.0
Banco Itaú Loan due March 2019	—			2.5
Banco Scotiabank Loan due September 2019	—			10.3
Banco Rabobank Loan due November 2019	16.8			18.1
3.7% Banco Itaú loan due March 2020	15.4			15.4
Banco Itaú Loans due May 2019 to April 2020	0.1			0.8
Banco Santander loan due September 2020	—			20.6
Banco Santander loan due October 2020	15.6			16.8
Banco Rabobank loan due July 2021	16.8			—
Banco Santander loan due September 2021	19.2			—
Financiadora de Estudos e Projetos Loan due November 2023	7.4			9.3
Other	—			1.7
	1,414.2			1,371.4
Less unamortized debt issuance costs	(5.1		)	(6.7		)
Total debt	1,409.1			1,364.7
Less current portion	(50.9		)	(43.5		)
Long-term debt	$	1,358.2		$	1,321.2

In the first quarter of 2019, the Company entered into two Brazilian reais-denominated loans totaling $18.0 million which matured in July and September of 2019, respectively. These loans bore interest at 123% and 128% of CDI, respectively. In the third quarter of 2019, the Company entered into Brazilian reais-denominated loans totaling $36.0 million which mature in July and September of 2021. These loans bear interest at 120% and 141% of CDI, respectively.

During the third quarter of 2019, the Company sold approximately $8.4 million of receivables for $7.9 million in cash. The proceeds of this transaction were used to repay loans that matured in September 2019. The Company is contingently liable for up to 20.0% of the receivables balance if the counter-parties are unable to collect on these accounts.

As of September 30, 2019, the term loans and revolving credit facility under the Company’s credit agreement were secured by substantially all existing and future U.S. assets, the Goderich mine in Ontario, Canada and capital stock of certain subsidiaries.

9. Commitments and Contingencies:

The Wisconsin Department of Agriculture, Trade and Consumer Protection (“DATCP”) and the Wisconsin Department of Natural Resources (“DNR”) have information indicating that agricultural chemicals are present within the subsurface area of the Company’s property located in Kenosha, Wisconsin. The agricultural chemicals were used by previous owners and operators of the site. None of the identified chemicals have been used in association with the Company’s operations since it acquired the property in 2002. DATCP and DNR have directed the Company to conduct further investigations into the environmental conditions at the Kenosha plant. The Company continues on-property investigations and has provided the findings to DATCP and DNR as they have become available. All investigations and mitigation activities to date, and any potential future remediation work, are being conducted under the Wisconsin Agricultural Chemical Cleanup Program, which provides for reimbursement of some of the costs.

The Company conducts business operations in several countries and is subject to various federal and local labor, social security, environmental and tax laws. While the Company believes it complies with such laws, they are complex and subject to interpretation. In addition to the tax assessments discussed in Note 7, the Company’s Brazilian subsidiaries are party to administrative tax proceedings and claims which totaled $15.2 million and $15.9 million as of September 30, 2019 and December 31, 2018, respectively, and relate primarily to value added tax, state tax (ICMS) and social security tax (PIS and COFINS) assessments. The

15

Company has assessed the likelihood of a loss at less than probable and therefore, has not established a reserve for these matters. The Company also assumed liabilities for labor-related matters in connection with the 2016 acquisition of Produquímica Indústria e Comércio S.A. (which is now known as Compass Minerals América do Sul Indústria e Comércio S.A.), which are primarily related to compensation, labor benefits and consequential tax claims that totaled $6.0 million and $7.8 million as of September 30, 2019 and December 31, 2018, respectively. The Company believes the maximum exposure for these other labor matters totaled approximately $25 million and $31 million as of September 30, 2019 and December 31, 2018, respectively.

The Division of Enforcement of the U.S. Securities and Exchange Commission is investigating the Company’s disclosures concerning the operation of the Goderich mine. The Company has cooperated with this investigation and will continue to do so. While it is not possible to predict the timing or the outcome of the SEC inquiry, the Company believes that this matter will not have a material impact on its results of operation, cash flows or financial position.

The Company is also involved in legal and administrative proceedings and claims of various types from the ordinary course of the Company’s business.

Management cannot predict the outcome of legal claims and proceedings with certainty. Nevertheless, management believes the outcome of legal proceedings and claims, which are pending or known to be threatened, even if determined adversely, will not, individually or in the aggregate, have a material adverse effect on the Company’s results of operations, cash flows or financial position.

10. Operating Segments:

The Company’s reportable segments are strategic business units that offer different products and services, and each business requires different technology and marketing strategies. The Company has three reportable segments: Salt, Plant Nutrition North America and Plant Nutrition South America. The Salt segment produces and markets salt, consisting of sodium chloride and magnesium chloride, for use in road deicing for winter roadway safety and for dust control, food processing, water softeners and other consumer, agricultural and industrial applications. Plant nutrients, including SOP, secondary nutrients and micronutrients are produced and marketed through the Plant Nutrition North America segment. The Plant Nutrition South America segment operates two primary businesses in Brazil – agricultural productivity and chemical solutions. The agricultural productivity division manufactures and distributes a broad offering of specialty plant nutrition solution-based products that are used in direct soil and foliar applications, as well as through irrigation systems and for seed treatment. The chemical solutions division manufactures and markets specialty chemicals for the industrial chemical industry.

Segment information is as follows (in millions):

Three Months Ended September 30, 2019	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate & Other(a)			Total
Sales to external customers	$	159.6	$	44.4	$	135.0	$	2.3		$	341.3
Intersegment sales	—		1.3		0.1		(1.4		)	—
Shipping and handling cost	43.4		5.8		5.2		—			54.4
Operating earnings (loss)	20.6		4.7		22.4		(17.6		)	30.1
Depreciation, depletion and amortization	14.3		11.0		6.0		2.6			33.9
Total assets (as of end of period)	959.2		572.8		683.1		114.7			2,329.8

Three Months Ended September 30, 2018	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate & Other(a)			Total
Sales to external customers	$	137.0	$	41.7	$	141.2	$	2.6		$	322.5
Intersegment sales	—		1.1		1.1		(2.2		)	—
Shipping and handling cost	41.2		5.0		5.7		—			51.9
Operating earnings (loss)	12.1		2.3		31.2		(13.0		)	32.6
Depreciation, depletion and amortization	13.7		12.8		5.0		2.5			34.0
Total assets (as of end of period)	918.5		594.5		705.4		134.6			2,353.0

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Nine Months Ended September 30, 2019	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate & Other(a)			Total
Sales to external customers	$	578.6	$	129.7	$	274.8	$	7.1		$	990.2
Intersegment sales	—		4.4		2.7		(7.1		)	—
Shipping and handling cost	184.7		18.3		12.3		—			215.3
Operating earnings (loss)	87.5		7.7		21.5		(49.3		)	67.4
Depreciation, depletion and amortization	44.4		33.5		17.0		7.9			102.8

Nine Months Ended September 30, 2018	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate & Other(a)			Total
Sales to external customers	$	574.0	$	146.4	$	278.6	$	8.1		$	1,007.1
Intersegment sales	—		3.5		2.6		(6.1		)	—
Shipping and handling cost	190.1		17.6		14.1		—			221.8
Operating earnings (loss)	58.7		11.4		32.7		(40.8		)	62.0
Depreciation, depletion and amortization	42.5		37.1		16.5		7.5			103.6

Disaggregated revenue by product type is as follows (in millions):

Three Months Ended September 30, 2019	Salt		Plant Nutrition North America			Plant Nutrition South America			Corporate & Other(a)		Total
Highway Deicing Salt	$	84.2	$	—		$	—		$	—	$	84.2
Consumer & Industrial Salt	75.4		—			—			—		75.4
SOP and Specialty Plant Nutrients	—		45.7			112.2			—		157.9
Industrial Chemicals	—		—			22.9			—		22.9
Eliminations & Other	—		(1.3		)	(0.1		)	2.3		0.9
Sales to external customers	$	159.6	$	44.4		$	135.0		$	2.3	$	341.3

Three Months Ended September 30, 2018	Salt		Plant Nutrition North America			Plant Nutrition South America			Corporate & Other(a)		Total
Highway Deicing Salt	$	64.0	$	—		$	—		$	—	$	64.0
Consumer & Industrial Salt	73.0		—			—			—		73.0
SOP and Specialty Plant Nutrients	—		42.8			119.4			—		162.2
Industrial Chemicals	—		—			22.9			—		22.9
Eliminations & Other	—		(1.1		)	(1.1		)	2.6		0.4
Sales to external customers	$	137.0	$	41.7		$	141.2		$	2.6	$	322.5

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Nine Months Ended September 30, 2019	Salt		Plant Nutrition North America			Plant Nutrition South America			Corporate & Other(a)		Total
Highway Deicing Salt	$	349.8	$	—		$	—		$	—	$	349.8
Consumer & Industrial Salt	228.8		—			—			—		228.8
SOP and Specialty Plant Nutrients	—		134.1			210.7			—		344.8
Industrial Chemicals	—		—			66.8			—		66.8
Eliminations & Other	—		(4.4		)	(2.7		)	7.1		—
Sales to external customers	$	578.6	$	129.7		$	274.8		$	7.1	$	990.2

Nine Months Ended September 30, 2018	Salt		Plant Nutrition North America			Plant Nutrition South America			Corporate & Other(a)		Total
Highway Deicing Salt	$	360.0	$	—		$	—		$	—	$	360.0
Consumer & Industrial Salt	214.0		—			—			—		214.0
SOP and Specialty Plant Nutrients	—		149.9			208.5			—		358.4
Industrial Chemicals	—		—			72.7			—		72.7
Eliminations & Other	—		(3.5		)	(2.6		)	8.1		2.0
Sales to external customers	$	574.0	$	146.4		$	278.6		$	8.1	$	1,007.1

(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, legal and finance functions.

The Company’s revenue by geographic area is as follows (in millions):

Revenue	Three Months Ended September 30, 2019		Nine Months Ended September 30, 2019
United States(a)	$	159.5	$	526.1
Canada	34.2		149.5
Brazil	131.7		266.4
United Kingdom	11.0		34.0
Other	4.9		14.2
Total revenue	$	341.3	$	990.2

Revenue	Three Months Ended September 30, 2018		Nine Months Ended September 30, 2018
United States(a)	$	126.0	$	498.5
Canada	33.4		157.0
Brazil	136.3		270.3
United Kingdom	17.3		64.0
Other	9.5		17.3
Total revenue	$	322.5	$	1,007.1

(a) United States sales exclude product sold to foreign customers at U.S. ports.

11. Stockholders’ Equity and Equity Instruments:

In May 2015, the Company’s stockholders approved the 2015 Incentive Award Plan (as amended, the “2015 Plan”), which authorizes the issuance of 3,000,000 shares of Company common stock. Since the date the 2015 Plan was approved, the Company ceased issuing equity awards under the 2005 Incentive Award Plan (as amended, the “2005 Plan”). The 2005 Plan and 2015 Plan allow for grants of equity awards to executive officers, other employees and directors, including restricted stock units (“RSUs”),

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performance stock units (“PSUs”), stock options and deferred stock units. The grants occur following approval by the compensation committee of the Company’s board of directors, with the amount and terms communicated to employees shortly thereafter. 

Options

Most of the stock options granted under the 2005 Plan and 2015 Plan vest ratably, in tranches, over a four-year service period. Unexercised options expire after seven years. Options do not have dividend or voting rights. Upon vesting, each option can be exercised to purchase one share of the Company’s common stock. The exercise price of options is equal to the closing stock price on the grant date.

To estimate the fair value of options on the grant date, the Company uses the Black-Scholes option valuation model. Award recipients are grouped according to expected exercise behavior. Unless better information is available to estimate the expected term of the options, the estimate is based on historical exercise experience. The risk-free rate, using U.S. Treasury yield curves in effect at the time of grant, is selected based on the expected term of each group. The Company’s historical stock price is used to estimate expected volatility. The fair value and inputs used to calculate fair value for options granted in 2019 are included in the table below:

Fair value of options granted	$9.15
Exercise price	$54.15
Expected term (years)	4.5
Expected volatility	28.0%
Dividend yield	4.1%
Risk-free rate of return	2.3%

RSUs

Typically, the RSUs granted under the 2015 Plan vest after three years of service. RSUs entitle the holders to one share of common stock for each vested RSU. Unvested RSUs do not have voting rights but are entitled to receive non-forfeitable dividends (generally after a performance hurdle has been satisfied for the year of the grant) or other distributions equal to those declared on the Company’s common stock for RSUs that are earned as a result of the satisfaction of the performance hurdle. The closing stock price on the grant date is used to determine the fair value of RSUs.

PSUs

The PSUs granted under the 2015 Plan are either total shareholder return PSUs (“TSR PSUs”) or return on invested capital PSUs (“ROIC PSUs”). The actual number of shares of the Company’s common stock that may be earned with respect to TSR PSUs is calculated by comparing the Company’s total shareholder return to the total shareholder return for each company comprising the Russell 3000 Index (for TSR PSUs granted in 2017 and earlier) or the Company’s peer group (for TSR PSUs granted in 2018 and later) over the three-year performance period and may range from 0% to 150% of the target number of shares based upon the attainment of these market conditions. The actual number of shares of common stock that may be earned with respect to ROIC PSUs is calculated based on the average of the Company’s annual return on invested capital for each year in the three-year performance period and may range from 0% to 200% of the target number of shares based upon the attainment of these performance conditions.

PSUs represent a target number of shares of the Company’s common stock that may be earned before adjustment based upon the attainment of certain conditions. Holders of PSUs do not have voting rights but are entitled to receive non-forfeitable dividends or other distributions equal to those declared on the Company’s common stock for PSUs that are earned, which are paid when the shares underlying the PSUs are paid.

To estimate the fair value of the TSR PSUs on the grant date, the Company uses a Monte-Carlo simulation model, which simulates future stock prices of the Company as well as the companies comprising the Russell 3000 Index or the Company’s peer group depending on the year granted. This model uses historical stock prices to estimate expected volatility and the Company’s correlation to the Russell 3000 Index or peer group. The risk-free rate was determined using the same methodology as the option valuations as discussed above. The Company’s closing stock price on the grant date was used to estimate the fair value of the ROIC PSUs. The Company will adjust the expense of the ROIC PSUs based upon its estimate of the number of shares that will ultimately vest at each interim date during the vesting period.

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During the nine months ended September 30, 2019, the Company reissued the following number of shares from treasury stock: no shares related to the exercise of stock options, 32,630 shares related to the release of RSUs which vested, no shares related to the release of PSUs which vested and 7,503 shares related to stock payments. In 2018, the Company issued 25,955 shares from treasury stock. The Company withheld 9,263 shares with a fair value of $0.3 million related to the vesting of RSUs during the first nine months of 2019. The fair value of the shares were valued at the closing price at the vesting date and represent the employee tax withholding for the employee’s compensation. The Company recognized a tax deficiency of $0.6 million from its equity compensation awards as an increase to income tax expense during the first nine months of 2019. During the first nine months of 2019 and 2018, the Company recorded $5.1 million (includes $1.1 million to be paid in cash) and $3.6 million, respectively, of compensation expense pursuant to its stock-based compensation plans. No amounts have been capitalized. The following table summarizes stock-based compensation activity during the nine months ended September 30, 2019:

	Stock Options				RSUs				PSUs(a)
	Number		Weighted-average exercise price		Number		Weighted-average fair value		Number		Weighted-average fair value
Outstanding at December 31, 2018	708,746		$	70.76	83,308		$	65.75	126,638		$	69.06
Granted	369,716		54.15		210,670		49.54		123,003		56.88
Exercised(b)	—		—		—		—		—		—
Released from restriction(b)	—		—		(32,630	)	66.95		—		—
Cancelled/expired	(139,479	)	69.48		(49,054	)	54.72		(67,134	)	67.39
Outstanding at September 30, 2019	938,983		$	64.41	212,294		$	52.02	182,507		$	61.46

(a) Until they vest, PSUs are included in the table at the target level at their grant date and at that level represent one share of common stock per PSU.

(b) Common stock issued for exercised options and for vested and earned RSUs and PSUs was issued from treasury stock.

Other Comprehensive (Loss) Income

The Company’s comprehensive (loss) income is comprised of net earnings, net amortization of the unrealized loss of the pension obligation, the change in the unrealized gain on natural gas and foreign currency cash flow hedges and foreign currency translation adjustments. The components of and changes in accumulated other comprehensive loss (“AOCL”) as of and for the three and nine months ended September 30, 2019 and 2018, are as follows (in millions):

Three Months Ended September 30, 2019(a)	Gains and (Losses) on Cash Flow Hedges			Defined Benefit Pension			Foreign Currency			Total
Beginning balance	$	(1.0	)	$	(4.3	)	$	(172.9	)	$	(178.2	)
Other comprehensive income (loss) before reclassifications(b)	2.0			—			(50.7		)	(48.7		)
Amounts reclassified from accumulated other comprehensive loss	(1.7		)	0.1			—			(1.6		)
Net current period other comprehensive income (loss)	0.3			0.1			(50.7		)	(50.3		)
Ending balance	$	(0.7	)	$	(4.2	)	$	(223.6	)	$	(228.5	)

Three Months Ended September 30, 2018(a)	Gains and (Losses) on Cash Flow Hedges			Defined Benefit Pension			Foreign Currency			Total
Beginning balance	$	(0.9	)	$	(3.8	)	$	(176.2	)	$	(180.9	)
Other comprehensive income (loss) before reclassifications(b)	1.6			—			(8.9		)	(7.3		)
Amounts reclassified from accumulated other comprehensive loss	(1.3		)	—			—			(1.3		)
Net current period other comprehensive income (loss)	0.3			—			(8.9		)	(8.6		)
Ending balance	$	(0.6	)	$	(3.8	)	$	(185.1	)	$	(189.5	)

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Nine Months Ended September 30, 2019(a)	Gains and (Losses) on Cash Flow Hedges			Defined Benefit Pension			Foreign Currency			Total
Beginning balance	$	(0.7	)	$	(4.5	)	$	(205.7	)	$	(210.9	)
Other comprehensive income (loss) before reclassifications(b)	1.9			—			(17.9		)	(16.0		)
Amounts reclassified from accumulated other comprehensive loss	(1.9		)	0.3			—			(1.6		)
Net current period other comprehensive income (loss)	—			0.3			(17.9		)	(17.6		)
Ending balance	$	(0.7	)	$	(4.2	)	$	(223.6	)	$	(228.5	)

Nine Months Ended September 30, 2018(a)	Gains and (Losses) on Cash Flow Hedges			Defined Benefit Pension			Foreign Currency			Total
Beginning balance	$	(0.9	)	$	(3.9	)	$	(73.1	)	$	(77.9	)
Other comprehensive income (loss) before reclassifications(b)	1.5			—			(112.0		)	(110.5		)
Amounts reclassified from accumulated other comprehensive loss	(1.0		)	0.1			—			(0.9		)
Net current period other comprehensive income (loss)	0.5			0.1			(112.0		)	(111.4		)
Reclassification of stranded tax out of AOCL to retained earnings(c)	(0.2		)	—			—			(0.2		)
Ending balance	$	(0.6	)	$	(3.8	)	$	(185.1	)	$	(189.5	)

(a) With the exception of the cumulative foreign currency translation adjustment, for which no tax effect is recorded, the changes in the components of accumulated other comprehensive loss presented in the tables above are reflected net of applicable income taxes.

(b) The Company recorded foreign exchange losses of $25.7 million and $15.3 million in the three and nine months ended September 30, 2019 and $7.9 million and $55.9 million in the three and nine months ended September 30, 2018, respectively, in accumulated other comprehensive loss related to intercompany notes which were deemed to be of a long-term investment nature.

(c) In the first quarter of 2018, the Company adopted guidance which allows entities to reclassify tax effects of the change in U.S. income tax rates from accumulated other comprehensive loss to retained earnings.

The amounts reclassified from AOCL to expense for the three and nine months ended September 30, 2019 and 2018, are shown below (in millions):

	Amount Reclassified from AOCL
	Three Months Ended September 30, 2019			Nine Months Ended September 30, 2019			Line Item Impacted in the Consolidated Statements of Operations
Gains (losses) on cash flow hedges:
Natural gas instruments	$	(0.4	)	$	(0.6	)	Product cost
Foreign currency contracts	(2.1		)	(2.2		)	Interest expense
Income tax expense	0.8			0.9
Reclassifications, net of income taxes	(1.7		)	(1.9		)
Amortization of defined benefit pension:
Amortization of loss	$	0.1		$	0.3		Product cost
Reclassifications, net of income taxes	0.1			0.3
Total reclassifications, net of income taxes	$	(1.6	)	$	(1.6	)

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	Amount Reclassified from AOCL
	Three Months Ended September 30, 2018			Nine Months Ended September 30, 2018			Line Item Impacted in the Consolidated Statements of Operations
Gains (losses) on cash flow hedges:
Natural gas instruments	$	0.2		$	0.4		Product cost
Foreign currency contracts	(2.2		)	(2.0		)	Interest expense
Income tax expense	0.7			0.6
Reclassifications, net of income taxes	(1.3		)	(1.0		)
Amortization of defined benefit pension:
Amortization of loss	$	—		$	0.1		Product cost
Reclassifications, net of income taxes	—			0.1
Total reclassifications, net of income taxes	$	(1.3	)	$	(0.9	)

12. Derivative Financial Instruments:

The Company is subject to various types of market risks, including interest rate risk, foreign currency exchange rate transaction and translation risk and commodity pricing risk. Management may take actions to mitigate the exposure to these types of risks, including entering into forward purchase contracts and other financial instruments. Currently, the Company manages a portion of its commodity pricing and foreign currency exchange rate risks by using derivative instruments. The Company does not seek to engage in trading activities or take speculative positions with any financial instrument arrangement. The Company has entered into natural gas derivative instruments and foreign currency derivative instruments with counterparties it views as creditworthy. However, the Company does attempt to mitigate its counterparty credit risk exposures by, among other things, entering into master netting agreements with some of these counterparties. The Company records derivative financial instruments as either assets or liabilities at fair value in the Consolidated Balance Sheets.

Derivatives qualify for treatment as hedges when there is a high correlation between the change in fair value of the derivative instrument and the related change in value of the underlying hedged item. Depending on the exposure being hedged, the Company must designate the hedging instrument as a fair value hedge, a cash flow hedge or a net investment in foreign operations hedge. For the qualifying derivative instruments that have been designated as hedges, the change in fair value is recognized through earnings when the underlying transaction being hedged affects earnings, allowing a derivative’s gains and losses to offset related results from the hedged item in the statements of operations. Any ineffectiveness related to these hedges was not material for any of the periods presented. For derivative instruments that have not been designated as hedges, the entire change in fair value is recorded through earnings in the period of change.

Natural Gas Derivative Instruments

Natural gas is consumed at several of the Company’s production facilities, and changes in natural gas prices impact the Company’s operating margin. The Company’s objective is to reduce the earnings and cash flow impacts of changes in market prices of natural gas by fixing the purchase price of up to 90% of its forecasted natural gas usage. It is the Company’s policy to consider hedging portions of its natural gas usage up to 36 months in advance of the forecasted purchase. As of September 30, 2019, the Company had entered into natural gas derivative instruments to hedge a portion of its natural gas purchase requirements through December 2021. As of September 30, 2019 and December 31, 2018, the Company had agreements in place to hedge forecasted natural gas purchases of 2.3 million and 1.0 million MMBtus, respectively. All natural gas derivative instruments held by the Company as of September 30, 2019 and December 31, 2018 qualified and were designated as cash flow hedges. As of September 30, 2019, the Company expects to reclassify from accumulated other comprehensive loss to earnings during the next twelve months $0.6 million of net losses on derivative instruments related to its natural gas hedges.

Foreign Currency Derivatives Not Designated as Hedges

In February 2018, the Company entered into a forward instrument to swap currency denominated in Brazilian reais to Canadian dollars for the amounts borrowed under an intercompany note. The instrument matured in November 2018 and was for a notional amount of approximately $19.9 million U.S. dollars. The objective of the instrument was to mitigate the foreign currency fluctuation risk related to holding debt denominated in a currency other than its Brazil subsidiary’s functional currency. The instrument was not designated as a hedge. During the nine months ended September 30, 2018, the Company recognized a net gain of $3.5 million in other expense in its Consolidated Statements of Operations for this agreement.

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In the latter half of 2018, the Company entered into non-deliverable forward contracts to fix $11.9 million of its net position in accounts receivable and accounts payable in Brazil that were U.S. dollar denominated. The objective of these instruments was to mitigate the foreign currency fluctuation risk related to the Company’s accounts receivable and payable denominated in a currency other than its Brazil subsidiary’s functional currency. These forward contracts were not designated as hedges. These forward contracts matured in December 2018.

Foreign Currency Derivatives Designated as Hedges

The Company has entered into U.S. dollar-denominated debt instruments to provide funds for its operations in Brazil. The Company may also concurrently enter into foreign currency agreements whereby the Company agrees to swap interest and principal payments on loans denominated in U.S. dollars for principal and interest payments denominated in Brazilian reais, its Brazil subsidiary’s functional currency. The objective of the swap agreements is to mitigate the foreign currency fluctuation risk related to holding debt denominated in a currency other than the Company’s Brazil subsidiary’s functional currency. As of September 30, 2019, the Company had a swap agreement in place to hedge $15.8 million of a loan denominated in a currency other than its Brazil subsidiary’s functional currency. Payments on this loan is due on various dates extending through March 2020. As of September 30, 2019, this foreign currency derivative instrument qualified and was designated as a cash flow hedge. As of September 30, 2019, the Company expects to reclassify from accumulated other comprehensive loss to earnings during the next twelve months $3.2 million of net gains on derivative instruments related to this foreign currency swap agreement.

The following tables present the fair value of the Company’s hedged items as of September 30, 2019 and December 31, 2018 (in millions):

	Asset Derivatives			Liability Derivatives
Derivatives designated as hedging instruments:	Consolidated Balance Sheets Location	September 30, 2019		Consolidated Balance Sheets Location	September 30, 2019
Commodity contracts	Other current assets	$	0.1	Accrued expenses and other current liabilities	$	0.7
Commodity contracts	Other assets	0.1		Other noncurrent liabilities	0.4
Swap contracts	Other current assets	3.2		Accrued expenses and other current liabilities	—
Total derivatives designated as hedging instruments(a)(b)		$	3.4		$	1.1

(a) The Company has master netting agreements with both of its commodity hedge counterparties and accordingly has netted in its Consolidated Balance Sheets the immaterial amounts receivable above.

(b) The Company has commodity hedge agreements with two counterparties and a foreign currency swap agreement with one counterparty. Amounts recorded as liabilities for the Company’s commodity contracts are payable to both counterparties and amounts recorded as assets for the Company’s foreign currency swap agreements are receivable from one counterparty. 

	Asset Derivatives			Liability Derivatives
Derivatives designated as hedging instruments:	Consolidated Balance Sheets Location	December 31, 2018		Consolidated Balance Sheets Location	December 31, 2018
Commodity contracts	Other current assets	$	—	Accrued expenses and other current liabilities	$	0.6
Swap contracts	Other current assets	2.2		Accrued expenses and other current liabilities	—
Swap contracts	Other assets	2.3		Other noncurrent liabilities	—
Total derivatives designated as hedging instruments(a)(b)		$	4.5		$	0.6

(a) The Company has master netting agreements with its commodity hedge counterparties and accordingly has netted in its Consolidated Balance Sheets less than $0.1 million of its commodity contracts that are in a receivable position against its contracts in payable positions.

(b) The Company has both commodity hedge and foreign currency swap agreements with two counterparties each. Amounts recorded as liabilities for the Company’s commodity contracts are payable to both counterparties, and amounts recorded as assets for the Company’s foreign currency swap agreements are receivable from both counterparties. 

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13. Fair Value Measurements:

The Company’s financial instruments are measured and reported at their estimated fair values. Fair value is the price that would be received upon the sale of an asset or paid to transfer a liability in an orderly transaction. When available, the Company uses quoted prices in active markets to determine the fair values for its financial instruments (Level 1 inputs) or, absent quoted market prices, observable market-corroborated inputs over the term of the financial instruments (Level 2 inputs). The Company does not have any unobservable inputs that are not corroborated by market inputs (Level 3 inputs).

The Company holds marketable securities associated with its defined contribution and pre-tax savings plans, which are valued based on readily available quoted market prices. The Company utilizes derivative instruments to manage its risk of changes in natural gas prices and its risk of changes in foreign currency exchange rates (see Note 12). The fair values of the natural gas and foreign currency derivative instruments are determined using market data of forward prices for all of the Company’s contracts. 

The estimated fair values for each type of instrument are presented below (in millions):

	September 30, 2019			Level One			Level Two			Level Three
Asset Class:
Mutual fund investments in a non-qualified savings plan(a)	$	1.4		$	1.4		$	—		$	—
Derivatives – foreign currency contracts, net	3.2			—			3.2			—
Total Assets	$	4.6		$	1.4		$	3.2		$	—
Liability Class:
Liabilities related to non-qualified savings plan	$	(1.4	)	$	(1.4	)	$	—		$	—
Derivatives – natural gas instruments, net	(0.9		)	—			(0.9		)	—
Total Liabilities	$	(2.3	)	$	(1.4	)	$	(0.9	)	$	—

(a) Includes mutual fund investments of approximately 30% in common stock of large-cap U.S. companies, 15% in common stock of small to mid-cap U.S. companies, 5% in international companies, 10% in bond funds, 20% in short-term investments and 20% in blended funds.

	December 31, 2018			Level One			Level Two			Level Three
Asset Class:
Mutual fund investments in a non-qualified savings plan(a)	$	1.8		$	1.8		$	—		$	—
Derivatives – foreign currency contracts, net	4.5			—			4.5			—
Total Assets	$	6.3		$	1.8		$	4.5		$	—
Liability Class:
Liabilities related to non-qualified savings plan	$	(1.8	)	$	(1.8	)	$	—		$	—
Derivatives – natural gas instruments, net	(0.6		)	—			(0.6		)	—
Total Liabilities	$	(2.4	)	$	(1.8	)	$	(0.6	)	$	—

(a) Includes mutual fund investments of approximately 25% in the common stock of large-cap U.S. companies, 15% in the common stock of small to mid-cap U.S. companies, 5% in the common stock of international companies, 20% in bond funds, 15% in short-term investments and 20% in blended funds.

Cash and cash equivalents, accounts receivable (net of allowance for bad debts) and payables are carried at cost, which approximates fair value due to their liquid and short-term nature. The Company’s investments related to its nonqualified savings plan of $1.4 million and $1.8 million at September 30, 2019 and December 31, 2018, respectively, are stated at fair value based on quoted market prices. As of September 30, 2019 and December 31, 2018, the estimated amount a third party would pay for the Company’s fixed-rate 4.875% Senior Notes due July 2024, based on available trading information (Level 2), totaled $246.3 million and $226.3 million, respectively, compared with the aggregate principal amount at maturity of $250.0 million. The estimated amount a third party would pay at September 30, 2019 and December 31, 2018 for the amounts outstanding under the Company’s term loans and revolving credit facility, based upon available bid information received from the Company’s lender (Level 2), totaled $1.06 billion and $1.02 billion, respectively, compared with the aggregate principal balance of $1.07 billion and $1.03 billion, respectively. The Brazilian loans have floating rates and their fair value approximates their carrying value.

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14. Earnings per Share:

The Company calculates earnings per share using the two-class method. The two-class method requires allocating the Company’s net earnings to both common shares and participating securities. The following table sets forth the computation of basic and diluted earnings per common share (in millions, except for share and per-share data):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2019			2018			2019			2018
Numerator:
Net earnings	$	10.6		$	12.8		$	6.4		$	17.8
Less: net earnings allocated to participating securities(a)	(0.2		)	(0.1		)	(0.7		)	(0.3		)
Net earnings available to common shareholders	$	10.4		$	12.7		$	5.7		$	17.5
Denominator (in thousands):
Weighted-average common shares outstanding, shares for basic earnings per share	33,884			33,851			33,880			33,846
Weighted-average awards outstanding(b)	—			—			—			—
Shares for diluted earnings per share	33,884			33,851			33,880			33,846
Net earnings per common share, basic	$	0.31		$	0.37		$	0.17		$	0.52
Net earnings per common share, diluted	$	0.31		$	0.37		$	0.17		$	0.51

(a) Weighted participating securities include RSUs and PSUs that receive non-forfeitable dividends and consist of 321,000 and 291,000 weighted participating securities for the three and nine months ended September 30, 2019, respectively, and 193,000 and 183,000 weighted participating securities for the three and nine months ended September 30, 2018, respectively.

(b) For the calculation of diluted net earnings per share, the Company uses the more dilutive of either the treasury stock method or the two-class method to determine the weighted-average number of outstanding common shares. In addition, the Company had 1,194,000 and 1,049,000 weighted-average equity awards outstanding for the three and nine months ended September 30, 2019 and 871,000 and 802,000 weighted-average equity awards outstanding for the three and nine months ended September 30, 2018, respectively.

Item 2.    Management’s Discussion and Analysis of Financial Condition and Results of Operations

All statements, other than statements of historical fact, contained in this Quarterly Report on Form 10-Q constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995.

Forward-looking statements relate to future events or our future financial performance, and involve known and unknown risks, uncertainties, and other factors that may cause our actual results, levels of activity, performance or achievements to be materially different from future results, levels of activity, performance or achievements expressed or implied by these forward-looking statements. Factors that could cause actual results to differ materially from those expressed or implied by the forward-looking statements include, but are not limited to, the following: risks related to our mining and industrial operations; geological conditions; dependency on a limited number of key production and distribution facilities and critical equipment; weather conditions; strikes, other forms of work stoppage or slowdown or other union activities; the inability to fund necessary capital expenditures or successfully complete capital projects; supply constraints or price increases for energy and raw materials used in our production processes; our indebtedness and ability to pay our indebtedness; restrictions in our debt agreements that may limit our ability to operate our business or require accelerated debt payments; tax liabilities; financial assurance requirements; the inability of our customers to access credit or a default by our customers of trade credit extended by us or financing we have guaranteed; our payment of any dividends; the impact of competition on the sales of our products; risks associated with our international operations and sales; the impact of anticipated changes in plant nutrition product prices and customer application rates; conditions in the agricultural sector and supply and demand imbalances for competing plant nutrition products; increasing costs or a lack of availability of transportation services; the seasonal demand for our products; our rights and governmental authorizations to mine and operate our properties; compliance with foreign and United States (“U.S.”) laws and regulations applicable to our international operations; compliance with environmental, health and safety laws and regulations; environmental liabilities; misappropriation or infringement claims relating to intellectual property; product liability claims and product recalls; inability to obtain required product registrations or increased regulatory requirements; changes in industry standards and regulatory requirements; our ability to successfully implement our strategies; the loss of key personnel; risk of compromise to our computer systems, information technology or operations technology or the inability to protect confidential or proprietary data; our ability to expand our business through acquisitions, integrate acquired businesses and realize anticipated benefits from acquisitions; climate change; domestic and international general business and economic conditions; and other risks referenced from time to time in this report and our

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other filings with the Securities and Exchange Commission (the “SEC”), including the “Risk Factors” section of our Annual Report on Form 10-K for the year ended December 31, 2018.

In some cases, you can identify forward-looking statements by terminology such as “may,” “might,” “will,” “should,” “could,” “expects,” “intends,” “plans,” “anticipates,” “believes,” “estimates,” “predicts,” “potential,” “continue,” the negative of these terms or other comparable terminology. Forward-looking statements include without limitation statements about our outlook, expected sales volumes; working capital requirements; our reinvestment of foreign earnings outside the U.S.; our ability to optimize cash accessibility, minimize tax expense and meet debt service requirements; future tax payments and tax refunds; outcomes of matters with taxing authorities; the effects of currency fluctuations and inflation; and the seasonality of our business. These forward-looking statements are only predictions. Actual events or results may differ materially.

Although we believe that the expectations reflected in the forward-looking statements are reasonable, we cannot guarantee future results, levels of activity, performance or achievements. We undertake no duty to update any of the forward-looking statements after the date hereof or to reflect the occurrence of unanticipated events.

Unless the context requires otherwise, references to the “Company,” “Compass Minerals,” “our,” “us” and “we” refer to Compass Minerals International, Inc. (“CMI,” the parent holding company) and its consolidated subsidiaries. Except where otherwise noted, references to North America include only the continental“U.S.” and Canada, and references to the United Kingdom (the “U.K.”) include only England, Scotland and Wales. Except where otherwise noted, all references to tons refer to “short tons” and all amounts are in U.S. dollars. One short ton equals 2,000 pounds. Compass Minerals, Protassium+, Wolf Trax and Proacqua, and combinations thereof, are trademarks of CMI or its subsidiaries in the U.S. and other countries. 

Critical Accounting Estimates

Preparation of our consolidated financial statements in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses. Management believes the most complex and sensitive judgments result primarily from the need to make estimates about matters that are inherently uncertain. Management’s Discussion and Analysis and Note 2 to the Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2018 describe the significant accounting estimates and policies used in preparation of our consolidated financial statements. For a description of our critical accounting policies and estimates affecting leases, see Notes 1 and 3 to our Consolidated Financial Statements included in this Quarterly Report on Form 10-Q. Actual results in these areas could differ from management’s estimates.

Company Overview

Compass Minerals is a leading producer of essential minerals, including salt, sulfate of potash (“SOP”) specialty fertilizer and magnesium chloride. As of September 30, 2019, we operated 21 production and packaging facilities, including:

• The largest rock salt mine in the world in Goderich, Ontario, Canada;

• The largest dedicated rock salt mine in the U.K. in Winsford, Cheshire;

• A solar evaporation facility located in Ogden, Utah, which is both the largest SOP production site and the largest solar salt production site in the Western Hemisphere;

• Several mechanical evaporation facilities producing consumer and industrial salt; and

• Several facilities producing essential agricultural nutrients and specialty chemicals in Brazil.

Our salt business provides highway deicing salt to customers in North America and the U.K. as well as consumer deicing and water conditioning products, ingredients used in consumer and commercial food preparation, and other salt-based products for consumer, agricultural and industrial applications in North America. In the U.K., we operate a records management business utilizing excavated areas of our Winsford salt mine with one other surface location in London, England.

Our plant nutrition business produces and markets specialty plant nutrition products worldwide to distributors and retailers of crop inputs, as well as growers. Our principal plant nutrition product in our Plant Nutrition North America segment is SOP, which we market under the trade name Protassium+. We also sell various secondary nutrients as well as premium micronutrient products under our Wolf Trax brand.

Our Plant Nutrition South America segment operates two primary businesses in Brazil—agricultural productivity, which manufactures and distributes a broad offering of specialty plant nutrition solution-based products; and chemical solutions, which manufactures and markets specialty chemicals, primarily for the water treatment industry and for use in other industrial processes.

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Consolidated Results of Operations

The following is a summary of our consolidated results of operations for the three and nine months ended September 30, 2018 and 2019, respectively. The following discussion should be read in conjunction with the information contained in our consolidated financial statements and the notes thereto included in this Quarterly Report on Form 10-Q.

THREE AND NINE MONTHS ENDED SEPTEMBER 30

* Refer to “—Sensitivity Analysis Related to EBITDA and Adjusted EBITDA” for a reconciliation to the most directly comparable U.S. GAAP financial measure and the reasons we use this non-GAAP measure.

COMMENTARY: THREE MONTHS ENDED SEPTEMBER 30, 2018 AND 2019

• Total sales increased 6%, or $18.8 million, due to increases in Salt and Plant Nutrition North America sales, which were partially offset by a decrease in Plant Nutrition South America sales.

• Operating earnings decreased 8%, or $2.5 million, due to a decrease in Plant Nutrition South America sales and costs for executive transition, which was partially offset by increases in our Salt and Plant Nutrition North America segments.

• Earnings before interest, taxes, depreciation and amortization (“EBITDA”)* adjusted for items management believes are not indicative of our ongoing operating performance (“Adjusted EBITDA”)* decreased 1%, or $0.5 million.

• Diluted net earnings per share decreased 16%, or $0.06.

COMMENTARY: NINE MONTHS ENDED SEPTEMBER 30, 2018 AND 2019

• Total sales decreased 2%, or $16.9 million, due to a decrease in both of our plant nutrition businesses, which was partially offset by an increase in our Salt segment.

• Operating earnings increased 9%, or $5.4 million, due to higher operating earnings in our Salt segment, which was partially offset by lower operating earnings in both of our plant nutrition businesses and costs for executive transition.

• Adjusted EBITDA* increased 6%, or $9.2 million.

• Diluted net earnings per share decreased 67% or $0.34.

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THREE AND NINE MONTHS ENDED SEPTEMBER 30

COMMENTARY: THREE MONTHS ENDED SEPTEMBER 30, 2018 AND 2019

Gross Profit: Increased 7%, or $5.0 million; Gross Margin was unchanged.

• Salt segment gross profit increased $9.7 million primarily due to higher average sales prices and sales volumes, and lower per-unit shipping and handling costs, which was partially offset by higher product costs (see Salt commentary below for further detail).

• The gross profit of the plant nutrition business, on a combined basis, decreased $4.5 million. Plant Nutrition North America segment gross profit increased $3.1 million primarily due to lower depreciation expense and lower per-unit product cost, which was partially offset by higher per-unit shipping and handling costs due to an unfavorable geographic sales mix. Plant Nutrition South America segment gross profit decreased $7.6 million primarily due to lower agricultural productivity sales volumes, lower average sales prices for chemical solutions products and higher raw material input costs.

COMMENTARY: NINE MONTHS ENDED SEPTEMBER 30, 2018 AND 2019

Gross Profit: Increased 9%, or $15.5 million; Gross Margin increased 2 percentage points

• Salt segment gross profit increased $29.1 million primarily due to higher average sales prices, which were partially offset by lower sales volumes, increased per-unit shipping and handling costs and higher product costs (see “—Operating Segment Performance—Salt” for additional information).

• The plant nutrition business, on a combined basis, decreased $12.9 million. Plant Nutrition North America segment gross profit decreased $1.8 million primarily due to lower sales volumes, higher per-unit shipping and handling costs due to an unfavorable geographic sales mix and higher carryover inventory costs. Plant Nutrition South America segment gross profit decreased $11.1 million primarily due to higher raw material costs, lower chemical solutions product prices and a weaker Brazilian reais compared to the U.S. dollar, which was partially offset by higher chemical solutions sales volumes.

OTHER EXPENSES AND INCOME

COMMENTARY: THREE MONTHS ENDED SEPTEMBER 30, 2018 AND 2019

SG&A: Increased $7.5 million; increased 1.6 percentage points as a percentage of sales from 12.0% to 13.6%

• The increase in SG&A expense was primarily due to higher CEO and executive transition costs in corporate and Salt and higher corporate professional services expense.

Interest Expense: Increased $1.8 million to $17.7 million

• The increase was primarily due to an increase in borrowings under our revolving credit facility.

Other (Income) Expense, Net: Improved $5.4 million from a loss of $2.8 million to income of $2.6 million

• We realized foreign exchange gains of $1.8 million in the third quarter of 2019 compared to a loss of $3.5 million in the third quarter of 2018.

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Income Tax Expense: Increased $3.1 million from $1.7 million to $4.8 million

• The increase in income tax expense was primarily due to discrete tax expense items in the third quarter of 2019 and discrete tax benefits in the third quarter of 2018.

• Our income tax provision in both periods differs from the U.S. statutory rate primarily due to U.S. statutory depletion, state income taxes, Global intangible low-taxed income (“GILTI”), foreign income, mining and withholding taxes and interest expense recognition differences for tax and financial reporting purposes.

• Our effective tax rate increased from 12% in the third quarter of 2018 to 31% in the third quarter of 2019 primarily due to the impact of discrete tax items in the third quarters of 2019 and 2018, GILTI and increased mining tax due to higher production at our Goderich mine in 2019 as compared to 2018.

COMMENTARY: NINE MONTHS ENDED SEPTEMBER 30, 2018 AND 2019

SG&A: Increased $10.1 million; increased 1.3 percentage points as a percentage of sales from 11.6% to 12.9%

• The increase in SG&A expense was primarily due to higher costs related to CEO and other executive transition costs, corporate and Plant Nutrition North America employee-related costs and information technology licenses and service agreement costs.

Interest Expense: Increased $6.2 million to $50.7 million

• The increase was primarily due to higher U.S. interest rates and an increase in borrowings under our revolving credit facility.

Other Expense (Income), Net: Decreased $5.8 million from income of $0.4 million to an expense of $5.4 million

• We realized foreign exchange losses of $7.3 million and $2.3 million during the first nine months of 2019 and 2018, respectively. Lower interest income also contributed to the decrease.

Income Tax Expense: Increased $4.3 million from $1.0 million to $5.3 million

• The increase was primarily due to discrete tax expense items in 2019 versus discrete tax benefit items in 2018.

• Our income tax provision in both periods differs from the U.S. statutory rate primarily due to U.S. statutory depletion, state income taxes, GILTI, foreign income, mining and withholding taxes and interest expense recognition differences for tax and financial reporting purposes.

• Our effective tax rate increased from 5% in the first nine months of 2018 to 45% in the first nine months of 2019 primarily due to the impact of discrete tax expense items in 2019, discrete tax benefit items in 2018, GILTI and increased mining tax due to higher production at our Goderich mine in 2019 as compared to 2018.

Operating Segment Performance

The following financial results represent consolidated financial information with respect to sales from our Salt, Plant Nutrition North America and Plant Nutrition South America segments. The results of operations of the consolidated records management business and other incidental revenues include sales of $2.3 million and $2.6 million for the third quarter of 2019 and 2018, respectively, and $7.1 million and $8.1 million for the first nine months of 2019 and 2018, respectively. These revenues are not material to our consolidated financial results and are not included in the following operating segment financial data.

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Salt

THREE AND NINE MONTHS ENDED SEPTEMBER 30

	3Q 2019		3Q 2018		2019 YTD		2018 YTD
Salt Sales (in millions)	$	159.6	$	137.0	$	578.6	$	574.0
Salt Operating Earnings (in millions)	$	20.6	$	12.1	$	87.5	$	58.7
Salt Sales Volumes (thousands of tons)
Highway deicing	1,403		1,302		5,811		6,765
Consumer and industrial	500		474		1,489		1,379
Total tons sold	1,903		1,776		7,300		8,144
Average Salt Sales Price (per ton)
Highway deicing	$	60.01	$	49.15	$	60.19	$	53.21
Consumer and industrial	$	150.76	$	154.17	$	153.67	$	155.26
Combined	$	83.84	$	77.16	$	79.25	$	70.48

COMMENTARY: THREE MONTHS ENDED SEPTEMBER 30, 2018 AND 2019

• Salt sales increased 16%, or $22.6 million, primarily due to higher highway deicing average sales prices and higher Salt sales volumes.

• Salt average sales prices increased 9% and contributed $13.6 million to sales due to higher highway deicing prices.

• Highway deicing average sales prices increased 22% due to higher North American highway deicing contract prices for the 2019-2020 winter season and a favorable customer mix. Consumer and industrial average sales prices decreased 2% due to sales mix.

• Salt sales volumes increased 7%, or 127,000 tons, and favorably impacted sales by $9.0 million. Highway deicing sales volumes increased 8% primarily as result of higher restocking volumes in the current period in North America, which was partially offset by lower restocking in the U.K. following a milder winter season when compared to the significantly above average winter weather in the first quarter of 2018. Consumer and industrial sales volumes increased 5% due to higher sales of deicing products.

• Salt operating earnings increased 70%, or $8.5 million, due to higher highway deicing prices and lower freight rates for consumer and industrial products in the third quarter of 2019. Operating costs at our mines increased over the third quarter of 2018 due to unplanned downtime at our North American mines and labor dispute settlement expense at our Goderich mine in 2019. Production volume and per unit production costs at Goderich mine improved over 2018 when production was impacted by a labor strike. The increase in operating earnings was also offset by executive transition costs.

COMMENTARY: NINE MONTHS ENDED SEPTEMBER 30, 2018 AND 2019

• Salt sales increased 1%, or $4.6 million, due to higher consumer and industrial sales volumes and higher highway deicing average sales prices, which was partially offset by lower highway deicing sales volumes.

• Salt average sales price increased 12% and contributed $38.3 million to sales due to higher highway deicing prices and product sales mix, as consumer and industrial products, which have a higher average sales price than highway deicing products, were a higher proportion of total sales in the current period.

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• Highway deicing average sales prices increased 13% reflecting the second consecutive year of increased bid prices in North America. Consumer and industrial average sales prices decreased 1% due to product mix.

• Salt sales volumes decreased 10%, or 844,000 tons, and resulted in approximately $33.7 million of decreased Salt sales. Highway deicing sales volumes decreased 14% as a result of mild weather in the U.K. when compared to the significantly above average winter weather in the first quarter of 2018 and lower North American contract volumes in the 2018-2019 bid season due primarily to lower production volumes at our Goderich mine in 2018. Consumer and industrial sales volumes increased 8% due to higher sales volumes in both deicing and non-deicing products.

• Salt operating earnings increased 49%, or $28.8 million, due to higher highway deicing prices in 2019. Per-unit product costs were higher in the first nine months of 2019 due to a higher mix of consumer and industrial sales which have a higher per-unit cost. Per unit production costs and volumes at our North American mines have improved from 2018 which were unfavorably impacted by the labor strike at Goderich mine and a higher level of higher cost carryover in inventory.

Plant Nutrition North America

THREE AND NINE MONTHS ENDED SEPTEMBER 30

	3Q 2019		3Q 2018		2019 YTD		2018 YTD
Plant Nutrition North America Sales (in millions)	$	44.4	$	41.7	$	129.7	$	146.4
Plant Nutrition North America Operating Earnings (in millions)	$	4.7	$	2.3	$	7.7	$	11.4
Plant Nutrition North America Sales Volumes (thousands of tons)	69		64		200		231
Plant Nutrition North America Average Sales Price (per ton)	$	641	$	658	$	648	$	635

COMMENTARY: THREE MONTHS ENDED SEPTEMBER 30, 2018 AND 2019

• Plant Nutrition North America sales increased 6%, or $2.7 million due to higher SOP sales volumes, which was partially offset by lower average sales prices for its micronutrient products due to product mix.

• Plant Nutrition North America sales volumes increased 8%, or 5,000 tons, which resulted in a $3.4 million increase in sales. The increase in SOP sales volumes was partially offset by reduced micronutrient sales volumes.

• Plant Nutrition North America average sales prices decreased 3%, providing a $0.7 million offset to the increase in sales volumes reflecting a shift in product mix as sales of micronutrient sales were a lower proportion of our sales volumes in the current period.

• Plant Nutrition North America operating earnings increased $2.4 million to $4.7 million due to higher sales volumes and lower per-unit product cost due to fewer potassium chloride feedstock tons used to supplement production in the current period. In addition, product costs were lower due to lower depreciation expense. This improvement was partially offset by higher per-unit shipping and handling costs. Per-unit shipping and handling costs increased primarily due to longer shipping distances as fewer tons were sold in our primary markets.

COMMENTARY: NINE MONTHS ENDED SEPTEMBER 30, 2018 AND 2019

• Plant Nutrition North America sales decreased 11%, or $16.7 million due to lower sales volumes, which were partially offset by an increase in average sales prices.

• Plant Nutrition North America sales volumes decreased 13%, or 31,000 tons, and resulted in approximately $19.3 million

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of reduced Plant Nutrition North America sales. The volume decrease was primarily due to lower demand due to the wet weather conditions in key North American markets in the first half of 2019.

• Plant Nutrition North America average sales prices increased 2% and resulted in an increase in sales of $2.6 million due to a higher average SOP and micronutrient prices in 2019.

• Plant Nutrition North America operating earnings decreased 32%, or $3.7 million, due to lower sales volumes, higher per-unit shipping and handling costs, a less favorable geographic sales mix and higher cost carryover inventory from 2018 into 2019, than from 2017 into 2018. This decrease was partially offset by lower depreciation expense in the 2019 period.

Plant Nutrition South America

THREE AND NINE MONTHS ENDED SEPTEMBER 30

	3Q 2019		3Q 2018		2019 YTD		2018 YTD
Plant Nutrition South America Sales (in millions)	$	135.0	$	141.2	$	274.8	$	278.6
Plant Nutrition South America Operating Earnings (in millions)	$	22.4	$	31.2	$	21.5	$	32.7
Plant Nutrition South America Sales Volumes (thousands of tons)
Agricultural productivity	166		180		327		331
Chemical solutions	84		74		246		222
Total tons sold	250		254		573		553
Average Plant Nutrition South America Sales Price (per ton)
Agricultural productivity	$	673	$	656	$	635	$	622
Chemical solutions	$	275	$	313	$	272	$	328
Combined	$	540	$	557	$	479	$	504

COMMENTARY: THREE MONTHS ENDED SEPTEMBER 30, 2018 AND 2019

• Plant Nutrition South America sales decreased 4%, or $6.2 million, due to lower sales volumes and lower chemical solutions average prices.

• Plant Nutrition South America sales volumes decreased 2%, or 4,000 tons, which accounted for $6.0 million of the decrease in Plant Nutrition South America sales. Agricultural productivity sales volumes decreased 8% due primarily to lower demand for our products sold to distributors caused by uncertainty in the agriculture market. Chemical solutions sales volumes increased 14% due to higher sales of water treatment products.

• A 3% decrease in Plant Nutrition South America average sales price reduced sales by $0.2 million. The decrease in average sales price was due to a 12% decrease in chemical solutions product prices as a result of shifts in product sales mix and competitive pressure for industrial and water treatment products. The decrease was partially offset by a 3% increase in agriculture product sales prices, reflecting shifts in product sales mix and price increases to cover increased raw material input costs.

• Plant Nutrition South America operating earnings decreased $8.8 million to $22.4 million due to lower agricultural productivity sales volumes, a decrease in chemical solution average sales prices and an increase in raw material input costs.

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COMMENTARY: NINE MONTHS ENDED SEPTEMBER 30, 2018 AND 2019

• Plant Nutrition South America sales decreased 1% or $3.8 million reflecting a 6% unfavorable weighted average change in the Brazilian reais versus the U.S. dollar from the prior year.

• Plant Nutrition South America sales volumes increased 4%, or 20,000 tons, and offset the decrease in Plant Nutrition South America sales by $5.4 million due to an increase in chemical solutions product volumes. Sales of agricultural productivity and chemical solutions products were negatively impacted in the second quarter of 2018 by a truck driver strike in Brazil.

• A 5% decrease in Plant Nutrition South America average sales price contributed $9.2 million to the decrease in Plant Nutrition South America sales. The decrease in average sales price was primarily due to a 17% decrease in chemical solutions average sales prices due to a weaker Brazilian reais, shifts in product sales mix and competitive pressure for industrial and water treatment products. This decrease was partially offset by a 2% increase in agriculture product sales prices despite the weaker Reais to cover commodity cost increases.

• Plant Nutrition South America operating earnings decreased $11.2 million, primarily due to increased raw material costs and an unfavorable product mix.

2019 Full-Year Outlook

• With the finalization of the North American highway deicing bid season, we expect Salt sales volumes for 2019 to range from 10.8 million tons to 11.2 million tons.

• We are reducing our full-year 2019 sales volumes outlook for our Plant Nutrition North America products to reflect lower near-term demand expectations. As a result, we expect Plant Nutrition North America sales volumes for 2019 to range from 310,000 tons to 340,000 tons.

• For Plant Nutrition South America,we expect a strong 2019 fourth quarter to recoup some of third-quarter 2019 sales volumes shortfall, although risks remain given challenging crop economics driven by reduced soybean demand from China and general trade uncertainty. As such, Plant Nutrition South America sales volumes for 2019 are expected to range from 775,000 tons to 825,000 tons.

Liquidity and Capital Resources

Historically, our cash flows from operating activities have generally been adequate to fund our basic operating requirements and ongoing debt service. We have also used cash generated from operations to fund capital expenditures which strengthen our operational position, pay dividends, fund smaller acquisitions and repay our debt. To a certain extent, our ability to meet our short- and long-term liquidity and capital needs is subject to general economic, financial, competitive, legislative, regulatory, weather, effects of climate change, geological variations in our mine deposits and other factors that are beyond our control. Historically, our working capital requirements have been the highest in the fourth quarter and lowest in the second quarter. As a result of the acquisition of Produquímica Indústria e Comércio S.A. (which is now known as Compass Minerals América do Sul Indústria e Comércio S.A.), our working capital requirements are less seasonal. When needed, we may fund short-term working capital requirements by accessing our $300 million revolving credit facility.

We have been able to manage our cash flows generated and used across Compass Minerals to permanently reinvest earnings in our foreign jurisdictions or efficiently repatriate those funds to the U.S. As of September 30, 2019, we had $18.9 million of cash and cash equivalents (in our Consolidated Balance Sheets) that were either held directly or indirectly by foreign subsidiaries. During the fourth quarter of 2018, we revised our permanently reinvested assertion to indicate that we expect to repatriate approximately $150 million of unremitted foreign earnings on which we have recorded a $4.8 million deferred tax liability as of September 30, 2019 for foreign withholding tax and state income tax. Due to our ability to generate adequate levels of domestic cash flow on an annual basis, it is our current intention to continue to reinvest all remaining undistributed earnings of our foreign subsidiaries indefinitely. We review our tax circumstances on a regular basis with the intent of optimizing cash accessibility and minimizing tax expense. In addition, the amount of permanently reinvested earnings is influenced by, among other things, the profits generated by our foreign subsidiaries and the amount of investment in those same subsidiaries. The profits generated by our domestic and foreign subsidiaries are impacted by the transfer price charged on the transfer of our products between them. As discussed in Note 7 to our Consolidated Financial Statements, our calculated transfer price on certain products between one of our foreign subsidiaries and a domestic subsidiary has been challenged by Canadian federal and provincial governments. In the fourth quarter of 2017, we reached a federal settlement agreement with Canadian and U.S. tax authorities related to our transfer pricing issues for our 2007-2012 tax years. During 2018, in accordance with the settlement agreement, our U.S. subsidiary made intercompany cash payments of $85.7 million to our Canadian subsidiary and tax payments to Canadian taxing authorities of $17.5 million. Tax payments of $5.7 million were made during the first and second quarters of 2019, leaving an outstanding balance of $1.3 million as of September 30, 2019. Corresponding tax refunds of $3.4 million have been received as of September 30, 2019 from U.S.

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taxing authorities, with the remaining refund of approximately $19.5 million expected in late 2019. Additionally during the fourth quarter of 2018, we reached a federal settlement agreement with Canadian and U.S. tax authorities on transfer pricing and management fees as part of an advanced pricing agreement that covers tax years 2013-2021. During the second quarter of 2019, in accordance with the settlement agreement, our U.S. subsidiary made intercompany cash payments of $106.1 million to its Canadian subsidiary and tax payments to Canadian taxing authorities of $29.9 million. Corresponding tax refunds of $4.0 million were received during 2019 from U.S. taxing authorities, with the remaining $57.4 million expected in early 2020. There are ongoing challenges by Canadian provincial taxing authorities regarding our transfer prices of certain products. The final resolution of these challenges may not occur for several years. We currently expect the outcome of these matters will not have a material impact on our results of operations. However, it is possible the resolution could materially impact the amount of earnings attributable to our domestic and foreign subsidiaries, which could impact the amount of permanently reinvested foreign earnings as well as future cash flows from our domestic operations. See Note 7 to our Consolidated Financial Statements for a discussion regarding our Canadian tax reassessments and settlement.

A portion of our loans in Brazil are denominated in U.S. dollars. We have entered into foreign currency agreements whereby we agreed to swap interest and principal payments on the loans denominated in U.S. dollars for principal and interest payments denominated in Brazilian reais, the functional currency of our Brazil subsidiary. See Note 12 to our Consolidated Financial Statements for a discussion of our foreign currency agreements.

Cash and cash equivalents as of September 30, 2019 of $23.9 million, decreased $3.1 million from December 31, 2018. We generated $91.4 million of operating cash flows in the first nine months of 2019. In the first nine months of 2019, we used cash on hand, cash flows from operations and $49.3 million of net borrowings against our revolving credit agreement to fund capital expenditures of $71.6 million and pay dividends on our common stock of $73.6 million.

As of September 30, 2019, we had $1.41 billion of indebtedness, consisting of $250.0 million outstanding under our 4.875% Senior Notes due 2024, $1.07 billion of borrowings outstanding under our senior secured credit facilities (consisting of term loans and a revolving credit facility), including $250.4 million borrowed against our revolving credit facility, and $91.3 million of Brazilian debt (see Note 8 to our Consolidated Financial Statements for more detail regarding our debt). We had $10.5 million of outstanding letters of credit as of September 30, 2019, which reduced our revolving credit facility borrowing availability to $39.1 million.

Our debt service obligations could, under certain circumstances, materially affect our financial condition and impair our ability to operate our business or pursue our business strategies. As a holding company, CMI’s investments in its operating subsidiaries constitute substantially all of its assets. Consequently, our subsidiaries conduct substantially all of our consolidated operating activities and own substantially all of our operating assets. The principal source of the cash needed to pay our obligations is the cash generated from our subsidiaries’ operations and their borrowings. Our subsidiaries are not obligated to make funds available to CMI. Furthermore, we must remain in compliance with the terms of our credit agreement governing our term loans and revolving credit facility, including the total leverage ratio and interest coverage ratio, in order to make payments on our debt or pay dividends to our stockholders. We must also comply with the terms of our indenture governing our senior notes. Although we are in compliance with our debt covenants as of September 30, 2019, we can make no assurance that we will remain in compliance with these ratios nor can we make any assurance that the agreements governing the current and future indebtedness of our subsidiaries will permit our subsidiaries to provide us with sufficient dividends, distributions or loans to fund scheduled interest payments on our debt when due. If we consummate an additional acquisition, our debt service requirements could increase. Furthermore, we may need to refinance all or a portion of our indebtedness on or before maturity; however, we cannot provide assurance that we will be able to refinance any of our indebtedness on commercially reasonable terms or at all.

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The table below provides a summary of our cash flows by category:

NINE MONTHS ENDED SEPTEMBER 30, 2019	NINE MONTHS ENDED SEPTEMBER 30, 2018
Operating Activities:
» Net earnings were $6.4 million.	» Net earnings were $17.8 million.
» Non-cash depreciation and amortization expense was $102.8 million.	» Non-cash depreciation and amortization expense was $103.6 million.
» Working capital items were a use of operating cash flows of $21.5 million.	» Working capital items were a source of operating cash flows of $27.3 million.
Investing Activities:
» Net cash flows used by investing activities included $71.6 million of capital expenditures.	» Net cash flows used by investing activities included $72.2 million of capital expenditures.
Financing Activities:
» Net cash flows used by financing activities included the payment of dividends of $73.6 million. » In addition, we had net borrowings on our debt $49.3 million.	» Net cash flows used by financing activities included the payment of dividends of $73.4 million. » In addition, we had net payments on our debt of $11.3 million.

Other Matters

See Notes 7 and 9 to our Consolidated Financial Statements for a discussion regarding labor, environmental and litigation matters.

Sensitivity Analysis Related to EBITDA and Adjusted EBITDA

Management uses a variety of measures to evaluate our performance. While our consolidated financial statements, taken as a whole, provide an understanding of our overall results of operations, financial condition and cash flows, we analyze components of the consolidated financial statements to identify certain trends and evaluate specific performance areas. In addition to using U.S. GAAP financial measures, such as gross profit, net earnings and cash flows generated by operating activities, management uses EBITDA and Adjusted EBITDA. Both EBITDA and Adjusted EBITDA are non-GAAP financial measures used to evaluate the operating performance of our core business operations, because our resource allocation, financing methods, cost of capital and income tax positions are managed at a corporate level apart from the activities of the operating segments and our operating facilities are located in different taxing jurisdictions, which can cause considerable variation in net earnings. We also use these measures to assess our operating performance and return on capital, and to evaluate potential acquisitions or other capital projects. These measures are not calculated under U.S. GAAP and should not be considered in isolation or as a substitute for net earnings, operating earnings, cash flows or other financial data prepared in accordance with U.S. GAAP or as a measure of our overall profitability or liquidity. EBITDA and Adjusted EBITDA exclude interest expense, income taxes and depreciation and amortization, each of which are an essential element of our cost structure and cannot be eliminated. Furthermore, Adjusted EBITDA excludes other cash and non-cash items including restructuring costs and other (income) expense. Our borrowings are a significant component of our capital structure and interest expense is a continuing cost of debt. We are also required to pay income taxes, a required and ongoing consequence of our operations. We have a significant investment in capital assets and depreciation and amortization reflect the utilization of those assets in order to generate revenues. Consequently, any measure that excludes these elements has material limitations. While EBITDA and Adjusted EBITDA are frequently used as measures of operating performance, these terms are not necessarily comparable to similarly titled measures of other companies due to the potential inconsistencies in the method of calculation. 

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The calculation of EBITDA and Adjusted EBITDA as used by management is set forth in the table below (in millions):

	Three Months Ended September 30,					Nine Months Ended September 30,
	2019			2018		2019		2018
Net earnings	$	10.6		$	12.8	$	6.4	$	17.8
Interest expense	17.7			15.9		50.7		44.5
Income tax expense	4.8			1.7		5.3		1.0
Depreciation, depletion and amortization	33.9			34.0		102.8		103.6
EBITDA	67.0			64.4		165.2		166.9
Adjustments to EBITDA:
Executive transition costs	2.3			—		2.3		—
Logistics impact from flooding	—			—		2.8		—
Other (income) expense, net	(2.6		)	2.8		5.4		(0.4		)
Adjusted EBITDA	$	66.7		$	67.2	$	175.7	$	166.5

Recent Accounting Pronouncements

See Note 1 to our Consolidated Financial Statements for a discussion of recent accounting pronouncements.

Effects of Currency Fluctuations

Our operations outside of the U.S. are conducted primarily in Canada, Brazil and the U.K. Therefore, our results of operations are subject to both currency transaction risk and currency translation risk. We incur currency transaction risk whenever we or one of our subsidiaries enters into either a purchase or sales transaction using a currency other than the local currency of the transacting entity. With respect to currency translation risk, our financial condition and results of operations are measured and recorded in the relevant local currency and then translated into U.S. dollars for inclusion in our consolidated financial statements. Exchange rates between these currencies and the U.S. dollar have fluctuated significantly from time to time and may do so in the future. The majority of revenues and costs are denominated in U.S. dollars, with Canadian dollars, Brazilian reais and British pounds sterling also being significant. Significant changes in the value of the Canadian dollar, Brazilian reais or British pound sterling relative to the U.S. dollar could have a material effect on our financial condition.

Although inflation has not had a significant impact on our operations, our efforts to recover cost increases due to inflation may be hampered as a result of the competitive industries and countries in which we operate.

Seasonality

We experience a substantial amount of seasonality in our sales. Our sales of our salt deicing products are seasonal. Consequently, our Salt sales and operating income are generally higher in the first and fourth quarters and lower during the second and third quarters of each year. In particular, sales of highway and consumer deicing salt and magnesium chloride products vary based on the severity of the winter conditions in areas where the product is used. Following industry practice in North America, we seek to stockpile sufficient quantities of deicing salt in the second, third and fourth quarters to meet the estimated requirements for the winter season.

Our plant nutrition business is also seasonal. The strongest demand for our Plant Nutrition South America products in Brazil typically occurs during the spring planting season. As a result, we and our customers generally build inventories during the low demand periods of the year to ensure timely product availability during the peak sales season. The seasonality of this demand results in our sales volumes and net sales for our Plant Nutrition South America segment usually being the highest during the third and fourth quarters of each year (as the spring planting season begins in September in Brazil).

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Item 3.    Quantitative and Qualitative Disclosures About Market Risk

Our business is subject to various types of market risks that include interest rate risk, foreign currency exchange rate risk and commodity pricing risk. Management has taken actions to mitigate our exposure to commodity pricing and foreign currency exchange rate risk by entering into natural gas derivative instruments and foreign currency contracts. We may take further actions to mitigate our exposure to interest rates, exchange rates and changes in the cost of transporting our products due to variations in our contracted carriers’ cost of fuel, which is typically diesel fuel. However, there can be no assurance that our hedging activities will eliminate or substantially reduce these risks. We do not enter into any financial instrument arrangements for speculative purposes. Our market risk exposure related to these items has not changed materially since December 31, 2018.

Item 4.    Controls and Procedures

Evaluation of Disclosure Controls and Procedures

As of the end of the period covered by this Quarterly Report on Form 10-Q, an evaluation of the effectiveness of the design and operation of the Company’s disclosure controls and procedures (as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) was performed under the supervision and with the participation of the Company’s management, including the Chief Executive Officer and Chief Financial Officer. Based on that evaluation, the Company’s Chief Executive Officer and Chief Financial Officer concluded that the Company’s disclosure controls and procedures were effective as of September 30, 2019 to ensure that information required to be disclosed in the reports it files and submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms.

For this purpose, disclosure controls and procedures include controls and procedures designed to ensure that information that is required to be disclosed under the Exchange Act is accumulated and communicated to the Company’s management, including the Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure.

Changes in Internal Control Over Financial Reporting

Beginning January 1, 2019, the Company implemented new guidance related to leases. The Company has implemented internal controls to monitor and analyze those business practices that, if not followed, could have a material impact on its consolidated financial statements under the guidance.

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PART II. OTHER INFORMATION

Item 1.    Legal Proceedings

We are involved in the legal proceedings described in Note 7 and Note 9 to our Consolidated Financial Statements and, from time to time, various routine legal proceedings and claims arising from the ordinary course of our business. These primarily involve tax assessments, disputes with former employees and contract labor, commercial claims, product liability claims, personal injury claims and workers’ compensation claims. Management cannot predict the outcome of legal proceedings and claims with certainty. Nevertheless, management believes that the outcome of legal proceedings and claims, which are pending or known to be threatened, even if determined adversely, will not, either individually or in the aggregate, have a material adverse effect on our results of operations, cash flows or financial condition. There have been no material developments since December 31, 2018 with respect to our legal proceedings, except as described in Note 7 and Note 9 to our Consolidated Financial Statements.

Item 1A.    Risk Factors

For a discussion of the risk factors applicable to Compass Minerals, please refer to Part I, Item 1A. “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2018. There have been no material changes to our risk factors as disclosed in such Annual Report.

Item 2.    Unregistered Sales of Equity Securities and Use of Proceeds

(a)    None.

(b)    None.

(c)     Issuer Purchases of Equity Securities

The Company withheld 9,263 shares with a fair value of $0.3 million related to the vesting of RSUs during the first nine months of 2019. The fair value of the shares were valued at the closing price at the vesting date and represent the employee tax withholding for the employee’s compensation. These shares are not considered common stock repurchases under the Company’s equity compensation plans.

Item 3.    Defaults Upon Senior Securities

None.

Item 4.    Mine Safety Disclosures

Information concerning mine safety violations or other regulatory matters required by Section 1503(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act and Item 104 of Regulation S-K is included in Exhibit 95 to this Quarterly Report on Form 10-Q.

Item 5.    Other Information

None.

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Item 6.    Exhibits

Exhibit No.	Exhibit Description
10.1	Consulting Agreement, dated September 30, 2019, between Compass Minerals International, Inc. and Diana C. Toman (incorporated by reference to Exhibit 10.1 to Compass Minerals International, Inc.’s Current Report on Form 8-K/A filed on October 3, 2019).
31.1*	Section 302 Certifications of Kevin S. Crutchfield, President and Chief Executive Officer.
31.2*	Section 302 Certifications of James D. Standen, Chief Financial Officer.
32**	Certification Pursuant to 18 U.S.C. §1350 of Kevin S. Crutchfield, President and Chief Executive Officer, and James D. Standen, Chief Financial Officer.
95*	Mine Safety Disclosures.
101*	The following financial statements from the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2019, formatted in Inline Extensible Business Reporting Language (iXBRL): (i) Consolidated Balance Sheets, (ii) Consolidated Statements of Operations, (iii) Consolidated Statements of Comprehensive (Loss) Income, (iv) Consolidated Statements of Stockholders’ Equity, (v) Consolidated Statements of Cash Flows, and (vi) the Notes to the Consolidated Financial Statements.
*    Filed herewith
**    Furnished herewith

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	COMPASS MINERALS INTERNATIONAL, INC.
Date: November 6, 2019	By:	/s/ James D. Standen
		James D. Standen
		Chief Financial Officer
		(Principal Financial and Accounting Officer)

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EX-31.1

Exhibit 31.1

CERTIFICATION

I, Kevin S. Crutchfield, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Compass Minerals International, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 6, 2019	By:	/s/ Kevin S. Crutchfield
		Kevin S. Crutchfield
		President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, James D. Standen, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Compass Minerals International, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 6, 2019	By:	/s/ James D. Standen
		James D. Standen
		Chief Financial Officer

EX-32

Exhibit 32

CERTIFICATION PURSUANT TO 18 U.S.C. §1350

Each of the undersigned hereby certifies that this quarterly report on Form 10-Q for the period ended September 30, 2019, as filed with the Securities and Exchange Commission on the date hereof, based on my knowledge, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that the information contained in this report fairly presents, in all material respects, the financial condition and results of operations of Compass Minerals International, Inc.

Date: November 6, 2019	By:	/s/ Kevin S. Crutchfield
		Kevin S. Crutchfield
		President and Chief Executive Officer
	By:	/s/ James D. Standen
		James D. Standen
		Chief Financial Officer

EX-95

Exhibit 95

Mine Safety Disclosure

We understand that to prevent employee and contractor injuries, we must approach safety excellence from many directions at once. We have developed a three-pronged approach towards world class safety performance. This approach consists of (1) setting a high standard of risk mitigation, (2) having robust safety management systems, and (3) supporting a culture of full engagement and personal accountability at all levels of the organization.

We continuously monitor our safety performance by assessing injury and non-injury incidents (e.g., near misses/near hits) as well as key performance indicators. We believe our approach to safety excellence will help us deliver on our commitment to our employees, contractors, their families and our customers to provide a safe working environment.

Mine Safety Data

A subsidiary of Compass Minerals International, Inc. owns and operates the Cote Blanche mine, an underground salt mine located in St. Mary Parish, Louisiana. The Cote Blanche mine is subject to regulation by the Mine Safety and Health Administration (“MSHA”) under the Federal Mine Safety and Health Act of 1977, as amended (the “Mine Act”).

MSHA is required to regularly inspect the Cote Blanche mine and issue a citation, or take other enforcement action, if an inspector or authorized representative believes that a violation of the Mine Act or MSHA’s standards or regulations has occurred. MSHA is required to propose a civil penalty for each alleged violation that it cites.

We have the option to contest any enforcement action or related penalty we receive before the Federal Mine Safety and Health Review Commission. As a result of this process, an enforcement action may be modified or vacated and any civil penalty proposed by MSHA for an alleged violation may be increased, reduced or eliminated. However, under the Mine Act, we are required to abate (or correct) each alleged violation within a specified time period, regardless of whether we contest the alleged violation.

The table below sets forth information for the reporting period ended September 30, 2019 concerning certain mine safety violations and other regulatory matters pursuant to requirements under the Dodd-Frank Wall Street Reform and Consumer Protection Act and Securities and Exchange Commission rules and regulations. The information only reflects our U.S. mining operations, as these requirements do not apply to mining operations outside the U.S.

Mine Name/ Mine I.D. Number	Section 104 S&S Citations & Orders1	Section 104(b) Orders2	Section 104(d) Citations & Orders3	Section 110(b)(2) Violations4	Section 107(a) Orders5	Total Dollar Value of MSHA Proposed Assessments (Actual Amount)	Total Number of Mining Related Fatalities	Received Notice of Pattern of Violations under Section 104(e) (Yes/No)6	Legal Actions Pending as of Last Day of Period	Legal Actions Initiated During Period	Legal Actions Resolved During Period
Cote Blanche Mine/16-00358	10	0	0	0	0	$5,986	1	No	0	0	0

1 Represents the number of citations and orders issued under section 104 of the Mine Act for alleged violations of mandatory health or safety standards that could significantly and substantially contribute to a mine health and safety hazard. The number reported includes no orders alleging an S&S violation issued under Section 104(g) of the Mine Act.

2 Represents the number of orders issued under section 104(b) of the Mine Act for alleged failures to abate a citation issued under section 104(a) of the Mine Act within the time period specified in the citation.

3 Represents the number of citations and orders issued under section 104(d) of the Mine Act for alleged unwarrantable failures (aggravated conduct constituting more than ordinary negligence) to comply with mandatory safety or health standards.

4 Represents the number of violations issued under section 110(b)(2) of the Mine Act for alleged “flagrant” failures (reckless or repeated failures) to make reasonable efforts to eliminate a known violation of a mandatory safety or health standard that substantially proximately caused, or reasonably could have been expected to cause, death or serious bodily injury.

5 Represents the number of orders issued under section 107(a) of the Mine Act for alleged conditions or practices which could reasonably be expected to cause death or serious physical harm before the condition or practice can be abated.

6 Section 104(e) written notices are issued for an alleged pattern of violating mandatory health or safety standards that could significantly and substantially contribute to a mine safety or health hazard.

2

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Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	9 Months Ended	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Sep. 30, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019
Tax Year 2007 Through 2016
Income Tax Disclosure [Line Items]
Intercompany cash payments for tax settlements				$ 85.7
Payments for income tax settlements		$ 5.7
Tax Year 2013 Through 2021
Income Tax Disclosure [Line Items]
Intercompany cash payments for tax settlements	$ 106.1
Canadian Tax Authority | Tax Year 2007 Through 2016
Income Tax Disclosure [Line Items]
Tax liability (refund) from settlement			$ 1.3
Foreign Tax Authority
Income Tax Disclosure [Line Items]
Net operating loss carryforwards			22.4	27.2
Foreign Tax Authority | NOL carryforwards expire beginning in 2033
Income Tax Disclosure [Line Items]
Net operating loss carryforwards			1.2	1.2
Foreign Tax Authority | Tax Year 2007 Through 2016
Income Tax Disclosure [Line Items]
Payments for income tax settlements				17.5
Foreign Tax Authority | Tax Year 2013 Through 2021
Income Tax Disclosure [Line Items]
Payments for income tax settlements	$ 29.9
Foreign Tax Authority | Canadian Tax Authority
Income Tax Disclosure [Line Items]
Total reassessments including interest			126.2
Amount of security posted in the form of a performance bond			90.2
Amount of security posted in the form of cash			37.4
Foreign Tax Authority | Canadian Tax Authority | Tax Year 2007 Through 2016
Income Tax Disclosure [Line Items]
Increase to tax expense from settlement					$ 13.8
State and Local | NOL carryforwards expire beginning in 2027
Income Tax Disclosure [Line Items]
Net operating loss carryforwards			0.2	$ 0.2
U.S. Federal | Tax Year 2007 Through 2016
Income Tax Disclosure [Line Items]
Tax refund received			3.4
U.S. Federal | Tax Year 2007 Through 2016 | Scenario, Forecast
Income Tax Disclosure [Line Items]
Tax liability (refund) from settlement						$ (19.5)
U.S. Federal | Tax Year 2013 Through 2021
Income Tax Disclosure [Line Items]
Tax refund received			$ 4.0
U.S. Federal | Tax Year 2013 Through 2021 | Scenario, Forecast
Income Tax Disclosure [Line Items]
Tax liability (refund) from settlement						$ 57.4

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Leases - Supplemental Cash Flow Information (Details) $ in Millions	9 Months Ended
	Sep. 30, 2019 USD ($)
Leases [Abstract]
Operating cash flows from operating leases	$ 14.2
Operating cash flows from finance leases	0.4
Financing cash flows from finance leases	0.9
Leased assets obtained in exchange for new operating lease liabilities	2.8
Leased assets obtained in exchange for new finance lease liabilities	$ 0.1

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Operating Segments (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) Business segment	Sep. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment			3
Segment Reporting Information [Abstract]
Sales	$ 341.3	$ 322.5	$ 990.2	$ 1,007.1
Operating earnings (loss)	30.1	32.6	67.4	62.0
Depreciation, depletion and amortization	33.9	34.0	102.8	103.6
Total assets (as of end of period)	2,329.8	2,353.0	2,329.8	2,353.0	$ 2,367.9
United States
Segment Reporting Information [Abstract]
Sales	159.5	126.0	526.1	498.5
Canada
Segment Reporting Information [Abstract]
Sales	34.2	33.4	149.5	157.0
Brazil
Segment Reporting Information [Abstract]
Sales	131.7	136.3	266.4	270.3
United Kingdom
Segment Reporting Information [Abstract]
Sales	11.0	17.3	34.0	64.0
Other
Segment Reporting Information [Abstract]
Sales	4.9	9.5	14.2	17.3
Shipping and handling cost
Segment Reporting Information [Abstract]
Shipping and handling cost	54.4	51.9	215.3	221.8
Highway Deicing Salt
Segment Reporting Information [Abstract]
Sales	84.2	64.0	349.8	360.0
Consumer & Industrial Salt
Segment Reporting Information [Abstract]
Sales	75.4	73.0	228.8	214.0
SOP and Specialty Plant Nutrients
Segment Reporting Information [Abstract]
Sales	157.9	162.2	344.8	358.4
Industrial Chemicals
Segment Reporting Information [Abstract]
Sales	22.9	22.9	66.8	72.7
Operating Segments | Salt
Segment Reporting Information [Abstract]
Sales	159.6	137.0	578.6	574.0
Operating earnings (loss)	20.6	12.1	87.5	58.7
Depreciation, depletion and amortization	14.3	13.7	44.4	42.5
Total assets (as of end of period)	959.2	918.5	959.2	918.5
Operating Segments | Salt | Shipping and handling cost
Segment Reporting Information [Abstract]
Shipping and handling cost	43.4	41.2	184.7	190.1
Operating Segments | Salt | Highway Deicing Salt
Segment Reporting Information [Abstract]
Sales	84.2	64.0	349.8	360.0
Operating Segments | Salt | Consumer & Industrial Salt
Segment Reporting Information [Abstract]
Sales	75.4	73.0	228.8	214.0
Operating Segments | Salt | SOP and Specialty Plant Nutrients
Segment Reporting Information [Abstract]
Sales	0.0	0.0	0.0	0.0
Operating Segments | Salt | Industrial Chemicals
Segment Reporting Information [Abstract]
Sales	0.0	0.0	0.0	0.0
Operating Segments | Salt | Eliminations & Other
Segment Reporting Information [Abstract]
Sales	0.0	0.0	0.0	0.0
Operating Segments | Plant Nutrition North America
Segment Reporting Information [Abstract]
Sales	44.4	41.7	129.7	146.4
Operating earnings (loss)	4.7	2.3	7.7	11.4
Depreciation, depletion and amortization	11.0	12.8	33.5	37.1
Total assets (as of end of period)	572.8	594.5	572.8	594.5
Operating Segments | Plant Nutrition North America | Shipping and handling cost
Segment Reporting Information [Abstract]
Shipping and handling cost	5.8	5.0	18.3	17.6
Operating Segments | Plant Nutrition North America | Highway Deicing Salt
Segment Reporting Information [Abstract]
Sales	0.0	0.0	0.0	0.0
Operating Segments | Plant Nutrition North America | Consumer & Industrial Salt
Segment Reporting Information [Abstract]
Sales	0.0	0.0	0.0	0.0
Operating Segments | Plant Nutrition North America | SOP and Specialty Plant Nutrients
Segment Reporting Information [Abstract]
Sales	45.7	42.8	134.1	149.9
Operating Segments | Plant Nutrition North America | Industrial Chemicals
Segment Reporting Information [Abstract]
Sales	0.0	0.0	0.0	0.0
Operating Segments | Plant Nutrition North America | Eliminations & Other
Segment Reporting Information [Abstract]
Sales	(1.3)	(1.1)	$ (4.4)	(3.5)
Operating Segments | Plant Nutrition South America
Segment Reporting Information [Line Items]
Number of primary businesses | Business			2
Segment Reporting Information [Abstract]
Sales	135.0	141.2	$ 274.8	278.6
Operating earnings (loss)	22.4	31.2	21.5	32.7
Depreciation, depletion and amortization	6.0	5.0	17.0	16.5
Total assets (as of end of period)	683.1	705.4	683.1	705.4
Operating Segments | Plant Nutrition South America | Shipping and handling cost
Segment Reporting Information [Abstract]
Shipping and handling cost	5.2	5.7	12.3	14.1
Operating Segments | Plant Nutrition South America | Highway Deicing Salt
Segment Reporting Information [Abstract]
Sales	0.0	0.0	0.0	0.0
Operating Segments | Plant Nutrition South America | Consumer & Industrial Salt
Segment Reporting Information [Abstract]
Sales	0.0	0.0	0.0	0.0
Operating Segments | Plant Nutrition South America | SOP and Specialty Plant Nutrients
Segment Reporting Information [Abstract]
Sales	112.2	119.4	210.7	208.5
Operating Segments | Plant Nutrition South America | Industrial Chemicals
Segment Reporting Information [Abstract]
Sales	22.9	22.9	66.8	72.7
Operating Segments | Plant Nutrition South America | Eliminations & Other
Segment Reporting Information [Abstract]
Sales	(0.1)	(1.1)	(2.7)	(2.6)
Corporate & Other
Segment Reporting Information [Abstract]
Sales	2.3	2.6	7.1	8.1
Operating earnings (loss)	(17.6)	(13.0)	(49.3)	(40.8)
Depreciation, depletion and amortization	2.6	2.5	7.9	7.5
Total assets (as of end of period)	114.7	134.6	114.7	134.6
Corporate & Other | Shipping and handling cost
Segment Reporting Information [Abstract]
Shipping and handling cost	0.0	0.0	0.0	0.0
Corporate & Other | Highway Deicing Salt
Segment Reporting Information [Abstract]
Sales	0.0	0.0	0.0	0.0
Corporate & Other | Consumer & Industrial Salt
Segment Reporting Information [Abstract]
Sales	0.0	0.0	0.0	0.0
Corporate & Other | SOP and Specialty Plant Nutrients
Segment Reporting Information [Abstract]
Sales	0.0	0.0	0.0	0.0
Corporate & Other | Industrial Chemicals
Segment Reporting Information [Abstract]
Sales	0.0	0.0	0.0	0.0
Corporate & Other | Eliminations & Other
Segment Reporting Information [Abstract]
Sales	2.3	2.6	7.1	8.1
Intersegment Eliminations
Segment Reporting Information [Abstract]
Sales	(1.4)	(2.2)	(7.1)	(6.1)
Intersegment Eliminations | Eliminations & Other
Segment Reporting Information [Abstract]
Sales	0.9	0.4	0.0	2.0
Intersegment Eliminations | Salt
Segment Reporting Information [Abstract]
Sales	0.0	0.0	0.0	0.0
Intersegment Eliminations | Plant Nutrition North America
Segment Reporting Information [Abstract]
Sales	1.3	1.1	4.4	3.5
Intersegment Eliminations | Plant Nutrition South America
Segment Reporting Information [Abstract]
Sales	$ 0.1	$ 1.1	$ 2.7	$ 2.6

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Goodwill and Intangible Assets, Net (Tables)

9 Months Ended

Sep. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Intangible Assets

Amounts related to the Company’s amortization of intangible assets are as follows (in millions):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Aggregate amortization expense	$	3.3	$	3.5	$	10.3	$	11.4

Summary of Goodwill

Amounts related to the Company’s goodwill are as follows (in millions):

	September 30, 2019		December 31, 2018
Goodwill - Plant Nutrition North America Segment	$	54.3	$	52.6
Goodwill - Plant Nutrition South America Segment	272.0		292.3
Other	5.8		5.9
Total	$	332.1	$	350.8

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Stockholders' Equity and Equity Instruments

9 Months Ended

Sep. 30, 2019

Equity [Abstract]

Stockholders' Equity and Equity Instruments

Stockholders’ Equity and Equity Instruments:

In May 2015, the Company’s stockholders approved the 2015 Incentive Award Plan (as amended, the “2015 Plan”), which authorizes the issuance of 3,000,000 shares of Company common stock. Since the date the 2015 Plan was approved, the Company ceased issuing equity awards under the 2005 Incentive Award Plan (as amended, the “2005 Plan”). The 2005 Plan and 2015 Plan allow for grants of equity awards to executive officers, other employees and directors, including restricted stock units (“RSUs”),

performance stock units (“PSUs”), stock options and deferred stock units. The grants occur following approval by the compensation committee of the Company’s board of directors, with the amount and terms communicated to employees shortly thereafter. 

Options

Most of the stock options granted under the 2005 Plan and 2015 Plan vest ratably, in tranches, over a four-year service period. Unexercised options expire after seven years. Options do not have dividend or voting rights. Upon vesting, each option can be exercised to purchase one share of the Company’s common stock. The exercise price of options is equal to the closing stock price on the grant date.

To estimate the fair value of options on the grant date, the Company uses the Black-Scholes option valuation model. Award recipients are grouped according to expected exercise behavior. Unless better information is available to estimate the expected term of the options, the estimate is based on historical exercise experience. The risk-free rate, using U.S. Treasury yield curves in effect at the time of grant, is selected based on the expected term of each group. The Company’s historical stock price is used to estimate expected volatility. The fair value and inputs used to calculate fair value for options granted in 2019 are included in the table below:

Fair value of options granted	$9.15
Exercise price	$54.15
Expected term (years)	4.5
Expected volatility	28.0%
Dividend yield	4.1%
Risk-free rate of return	2.3%

RSUs

Typically, the RSUs granted under the 2015 Plan vest after three years of service. RSUs entitle the holders to one share of common stock for each vested RSU. Unvested RSUs do not have voting rights but are entitled to receive non-forfeitable dividends (generally after a performance hurdle has been satisfied for the year of the grant) or other distributions equal to those declared on the Company’s common stock for RSUs that are earned as a result of the satisfaction of the performance hurdle. The closing stock price on the grant date is used to determine the fair value of RSUs.

PSUs

The PSUs granted under the 2015 Plan are either total shareholder return PSUs (“TSR PSUs”) or return on invested capital PSUs (“ROIC PSUs”). The actual number of shares of the Company’s common stock that may be earned with respect to TSR PSUs is calculated by comparing the Company’s total shareholder return to the total shareholder return for each company comprising the Russell 3000 Index (for TSR PSUs granted in 2017 and earlier) or the Company’s peer group (for TSR PSUs granted in 2018 and later) over the three-year performance period and may range from 0% to 150% of the target number of shares based upon the attainment of these market conditions. The actual number of shares of common stock that may be earned with respect to ROIC PSUs is calculated based on the average of the Company’s annual return on invested capital for each year in the three-year performance period and may range from 0% to 200% of the target number of shares based upon the attainment of these performance conditions.

PSUs represent a target number of shares of the Company’s common stock that may be earned before adjustment based upon the attainment of certain conditions. Holders of PSUs do not have voting rights but are entitled to receive non-forfeitable dividends or other distributions equal to those declared on the Company’s common stock for PSUs that are earned, which are paid when the shares underlying the PSUs are paid.

To estimate the fair value of the TSR PSUs on the grant date, the Company uses a Monte-Carlo simulation model, which simulates future stock prices of the Company as well as the companies comprising the Russell 3000 Index or the Company’s peer group depending on the year granted. This model uses historical stock prices to estimate expected volatility and the Company’s correlation to the Russell 3000 Index or peer group. The risk-free rate was determined using the same methodology as the option valuations as discussed above. The Company’s closing stock price on the grant date was used to estimate the fair value of the ROIC PSUs. The Company will adjust the expense of the ROIC PSUs based upon its estimate of the number of shares that will ultimately vest at each interim date during the vesting period.

During the nine months ended September 30, 2019, the Company reissued the following number of shares from treasury stock: no shares related to the exercise of stock options, 32,630 shares related to the release of RSUs which vested, no shares related to the release of PSUs which vested and 7,503 shares related to stock payments. In 2018, the Company issued 25,955 shares from treasury stock. The Company withheld 9,263 shares with a fair value of $0.3 million related to the vesting of RSUs during the first nine months of 2019. The fair value of the shares were valued at the closing price at the vesting date and represent the employee tax withholding for the employee’s compensation. The Company recognized a tax deficiency of $0.6 million from its equity compensation awards as an increase to income tax expense during the first nine months of 2019. During the first nine months of 2019 and 2018, the Company recorded $5.1 million (includes $1.1 million to be paid in cash) and $3.6 million, respectively, of compensation expense pursuant to its stock-based compensation plans. No amounts have been capitalized. The following table summarizes stock-based compensation activity during the nine months ended September 30, 2019:

	Stock Options				RSUs				PSUs(a)
	Number		Weighted-average exercise price		Number		Weighted-average fair value		Number		Weighted-average fair value
Outstanding at December 31, 2018	708,746		$	70.76	83,308		$	65.75	126,638		$	69.06
Granted	369,716		54.15		210,670		49.54		123,003		56.88
Exercised(b)	—		—		—		—		—		—
Released from restriction(b)	—		—		(32,630	)	66.95		—		—
Cancelled/expired	(139,479	)	69.48		(49,054	)	54.72		(67,134	)	67.39
Outstanding at September 30, 2019	938,983		$	64.41	212,294		$	52.02	182,507		$	61.46

(a) Until they vest, PSUs are included in the table at the target level at their grant date and at that level represent one share of common stock per PSU.

(b) Common stock issued for exercised options and for vested and earned RSUs and PSUs was issued from treasury stock.

Other Comprehensive (Loss) Income

The Company’s comprehensive (loss) income is comprised of net earnings, net amortization of the unrealized loss of the pension obligation, the change in the unrealized gain on natural gas and foreign currency cash flow hedges and foreign currency translation adjustments. The components of and changes in accumulated other comprehensive loss (“AOCL”) as of and for the three and nine months ended September 30, 2019 and 2018, are as follows (in millions):

Three Months Ended September 30, 2019(a)	Gains and (Losses) on Cash Flow Hedges			Defined Benefit Pension			Foreign Currency			Total
Beginning balance	$	(1.0	)	$	(4.3	)	$	(172.9	)	$	(178.2	)
Other comprehensive income (loss) before reclassifications(b)	2.0			—			(50.7		)	(48.7		)
Amounts reclassified from accumulated other comprehensive loss	(1.7		)	0.1			—			(1.6		)
Net current period other comprehensive income (loss)	0.3			0.1			(50.7		)	(50.3		)
Ending balance	$	(0.7	)	$	(4.2	)	$	(223.6	)	$	(228.5	)

Three Months Ended September 30, 2018(a)	Gains and (Losses) on Cash Flow Hedges			Defined Benefit Pension			Foreign Currency			Total
Beginning balance	$	(0.9	)	$	(3.8	)	$	(176.2	)	$	(180.9	)
Other comprehensive income (loss) before reclassifications(b)	1.6			—			(8.9		)	(7.3		)
Amounts reclassified from accumulated other comprehensive loss	(1.3		)	—			—			(1.3		)
Net current period other comprehensive income (loss)	0.3			—			(8.9		)	(8.6		)
Ending balance	$	(0.6	)	$	(3.8	)	$	(185.1	)	$	(189.5	)

Nine Months Ended September 30, 2019(a)	Gains and (Losses) on Cash Flow Hedges			Defined Benefit Pension			Foreign Currency			Total
Beginning balance	$	(0.7	)	$	(4.5	)	$	(205.7	)	$	(210.9	)
Other comprehensive income (loss) before reclassifications(b)	1.9			—			(17.9		)	(16.0		)
Amounts reclassified from accumulated other comprehensive loss	(1.9		)	0.3			—			(1.6		)
Net current period other comprehensive income (loss)	—			0.3			(17.9		)	(17.6		)
Ending balance	$	(0.7	)	$	(4.2	)	$	(223.6	)	$	(228.5	)

Nine Months Ended September 30, 2018(a)	Gains and (Losses) on Cash Flow Hedges			Defined Benefit Pension			Foreign Currency			Total
Beginning balance	$	(0.9	)	$	(3.9	)	$	(73.1	)	$	(77.9	)
Other comprehensive income (loss) before reclassifications(b)	1.5			—			(112.0		)	(110.5		)
Amounts reclassified from accumulated other comprehensive loss	(1.0		)	0.1			—			(0.9		)
Net current period other comprehensive income (loss)	0.5			0.1			(112.0		)	(111.4		)
Reclassification of stranded tax out of AOCL to retained earnings(c)	(0.2		)	—			—			(0.2		)
Ending balance	$	(0.6	)	$	(3.8	)	$	(185.1	)	$	(189.5	)

(a) With the exception of the cumulative foreign currency translation adjustment, for which no tax effect is recorded, the changes in the components of accumulated other comprehensive loss presented in the tables above are reflected net of applicable income taxes.

(b) The Company recorded foreign exchange losses of $25.7 million and $15.3 million in the three and nine months ended September 30, 2019 and $7.9 million and $55.9 million in the three and nine months ended September 30, 2018, respectively, in accumulated other comprehensive loss related to intercompany notes which were deemed to be of a long-term investment nature.

(c) In the first quarter of 2018, the Company adopted guidance which allows entities to reclassify tax effects of the change in U.S. income tax rates from accumulated other comprehensive loss to retained earnings.

The amounts reclassified from AOCL to expense for the three and nine months ended September 30, 2019 and 2018, are shown below (in millions):

	Amount Reclassified from AOCL
	Three Months Ended September 30, 2019			Nine Months Ended September 30, 2019			Line Item Impacted in the Consolidated Statements of Operations
Gains (losses) on cash flow hedges:
Natural gas instruments	$	(0.4	)	$	(0.6	)	Product cost
Foreign currency contracts	(2.1		)	(2.2		)	Interest expense
Income tax expense	0.8			0.9
Reclassifications, net of income taxes	(1.7		)	(1.9		)
Amortization of defined benefit pension:
Amortization of loss	$	0.1		$	0.3		Product cost
Reclassifications, net of income taxes	0.1			0.3
Total reclassifications, net of income taxes	$	(1.6	)	$	(1.6	)

	Amount Reclassified from AOCL
	Three Months Ended September 30, 2018			Nine Months Ended September 30, 2018			Line Item Impacted in the Consolidated Statements of Operations
Gains (losses) on cash flow hedges:
Natural gas instruments	$	0.2		$	0.4		Product cost
Foreign currency contracts	(2.2		)	(2.0		)	Interest expense
Income tax expense	0.7			0.6
Reclassifications, net of income taxes	(1.3		)	(1.0		)
Amortization of defined benefit pension:
Amortization of loss	$	—		$	0.1		Product cost
Reclassifications, net of income taxes	—			0.1
Total reclassifications, net of income taxes	$	(1.3	)	$	(0.9	)

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Accounting Policies and Basis of Presentation (Policies)

9 Months Ended

Sep. 30, 2019

Accounting Policies [Abstract]

Basis of Consolidation

CMI is a holding company with no significant operations other than those of its wholly-owned subsidiaries. The consolidated financial statements include the accounts of CMI and its wholly-owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation.

Equity Method Investments

The Company uses the equity method of accounting for equity securities when it has significant influence or when it has more than a minor ownership interest or more than minor influence over an investee’s operations but does not have a controlling financial interest. Initial investments are recorded at cost (including certain transaction costs) and are adjusted by the Company’s share of the investees’ undistributed earnings and losses.

Basis of Presentation

The accompanying unaudited consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. These unaudited consolidated financial statements should be read in conjunction with the consolidated financial statements of the Company for the year ended December 31, 2018, as filed with the Securities and Exchange Commission in its Annual Report on Form 10-K. In the opinion of management, all adjustments, consisting of normal recurring adjustments considered necessary for a fair presentation, have been included.

Significant and Recent Accounting Pronouncements

Significant Accounting Policies

The Company’s significant accounting policies are detailed in “Note 2 – Summary of Significant Accounting Policies” within Item 8 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2018. Significant changes to these accounting policies as a result of adopting Accounting Standards Update (ASU) 2016-02, Leases (Topic 842), can be found in “Note 3 – Leases.”

Recent Accounting Pronouncements

In August 2018, the Financial Accounting Standards Board (the “FASB”) issued guidance to require customers in a cloud computing arrangement that is a service contract to follow the internal use software guidance to determine which implementation costs to capitalize as assets. The capitalized implementation costs related to these arrangements are required to be amortized over the term of the hosting arrangement. The guidance also clarifies the presentation requirements for these costs in an entity’s financial statements. The guidance is effective for periods beginning after December 15, 2019, and interim periods within those fiscal years. The Company does not expect this guidance to have a material impact on its consolidated financial statements.

In January 2017, the FASB issued guidance to simplify the accounting for goodwill impairment. The guidance removes Step 2 of the goodwill impairment test, which requires a hypothetical purchase price allocation. A goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. All other goodwill impairment guidance remains largely unchanged. The guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for annual and interim goodwill impairment testing dates after January 1, 2017. The Company is currently assessing the impact this guidance will have on its consolidated financial statements.

In June 2016, the FASB issued guidance for estimating credit losses on certain types of financial instruments, including trade receivables, by introducing an approach based on expected losses. The expected loss approach will require entities to incorporate considerations of historical information, current information and reasonable and supportable forecasts. The guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, requires a modified retrospective transition method and early adoption is permitted. The Company is currently assessing the impact this guidance will have on its consolidated financial statements.

Derivative Financial Instruments

The Company is subject to various types of market risks, including interest rate risk, foreign currency exchange rate transaction and translation risk and commodity pricing risk. Management may take actions to mitigate the exposure to these types of risks, including entering into forward purchase contracts and other financial instruments. Currently, the Company manages a portion of its commodity pricing and foreign currency exchange rate risks by using derivative instruments. The Company does not seek to engage in trading activities or take speculative positions with any financial instrument arrangement. The Company has entered into natural gas derivative instruments and foreign currency derivative instruments with counterparties it views as creditworthy. However, the Company does attempt to mitigate its counterparty credit risk exposures by, among other things, entering into master netting agreements with some of these counterparties. The Company records derivative financial instruments as either assets or liabilities at fair value in the Consolidated Balance Sheets.

Derivatives qualify for treatment as hedges when there is a high correlation between the change in fair value of the derivative instrument and the related change in value of the underlying hedged item. Depending on the exposure being hedged, the Company must designate the hedging instrument as a fair value hedge, a cash flow hedge or a net investment in foreign operations hedge. For the qualifying derivative instruments that have been designated as hedges, the change in fair value is recognized through earnings when the underlying transaction being hedged affects earnings, allowing a derivative’s gains and losses to offset related results from the hedged item in the statements of operations. Any ineffectiveness related to these hedges was not material for any of the periods presented. For derivative instruments that have not been designated as hedges, the entire change in fair value is recorded through earnings in the period of change.

Earnings Per Share

The Company calculates earnings per share using the two-class method. The two-class method requires allocating the Company’s net earnings to both common shares and participating securities.

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CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 23.9	$ 27.0
Receivables, less allowance for doubtful accounts of $10.3 in 2019 and $9.9 in 2018	216.0	311.6
Inventories	337.1	266.6
Other	118.4	116.0
Total current assets	695.4	721.2
Property, plant and equipment, net	1,023.5	1,052.0
Intangible assets, net	104.2	115.9
Goodwill	332.1	350.8
Investment in equity method investee	24.3	24.5
Other	150.3	103.5
Total assets	2,329.8	2,367.9
Current liabilities:
Current portion of long-term debt	50.9	43.5
Accounts payable	110.3	111.3
Accrued salaries and wages	34.1	31.8
Income taxes payable	4.0	32.1
Accrued interest	7.7	9.7
Accrued expenses and other current liabilities	70.9	54.9
Total current liabilities	277.9	283.3
Long-term debt, net of current portion	1,358.2	1,321.2
Deferred income taxes, net	89.1	100.8
Other noncurrent liabilities	145.1	122.4
Commitments and contingencies (Note 9)
Stockholders’ equity:
Common stock: $0.01 par value, 200,000,000 authorized shares; 35,367,264 issued shares	0.4	0.4
Additional paid-in capital	114.8	110.1
Treasury stock, at cost — 1,482,938 shares at September 30, 2019 and 1,513,808 shares at December 31, 2018	(3.2)	(2.9)
Retained earnings	576.0	643.5
Accumulated other comprehensive loss	(228.5)	(210.9)
Total stockholders’ equity	459.5	540.2
Total liabilities and stockholders’ equity	$ 2,329.8	$ 2,367.9

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Revenue Recognition (Details)	9 Months Ended
	Sep. 30, 2019
Revenue from Contract with Customer [Abstract]
Payment terms	30 days

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Stockholders' Equity and Equity Instruments (Tables)

9 Months Ended

Sep. 30, 2019

Equity [Abstract]

Schedule of Fair Value and Inputs Used to Calculate Fair Value for Options Granted

The fair value and inputs used to calculate fair value for options granted in 2019 are included in the table below:

Fair value of options granted	$9.15
Exercise price	$54.15
Expected term (years)	4.5
Expected volatility	28.0%
Dividend yield	4.1%
Risk-free rate of return	2.3%

Summary of Stock-Based Compensation Activity

The following table summarizes stock-based compensation activity during the nine months ended September 30, 2019:

	Stock Options				RSUs				PSUs(a)
	Number		Weighted-average exercise price		Number		Weighted-average fair value		Number		Weighted-average fair value
Outstanding at December 31, 2018	708,746		$	70.76	83,308		$	65.75	126,638		$	69.06
Granted	369,716		54.15		210,670		49.54		123,003		56.88
Exercised(b)	—		—		—		—		—		—
Released from restriction(b)	—		—		(32,630	)	66.95		—		—
Cancelled/expired	(139,479	)	69.48		(49,054	)	54.72		(67,134	)	67.39
Outstanding at September 30, 2019	938,983		$	64.41	212,294		$	52.02	182,507		$	61.46

(a) Until they vest, PSUs are included in the table at the target level at their grant date and at that level represent one share of common stock per PSU.

(b) Common stock issued for exercised options and for vested and earned RSUs and PSUs was issued from treasury stock.

Summary of Components and Changes in Accumulated Other Comprehensive Income (Loss)

The components of and changes in accumulated other comprehensive loss (“AOCL”) as of and for the three and nine months ended September 30, 2019 and 2018, are as follows (in millions):

Three Months Ended September 30, 2019(a)	Gains and (Losses) on Cash Flow Hedges			Defined Benefit Pension			Foreign Currency			Total
Beginning balance	$	(1.0	)	$	(4.3	)	$	(172.9	)	$	(178.2	)
Other comprehensive income (loss) before reclassifications(b)	2.0			—			(50.7		)	(48.7		)
Amounts reclassified from accumulated other comprehensive loss	(1.7		)	0.1			—			(1.6		)
Net current period other comprehensive income (loss)	0.3			0.1			(50.7		)	(50.3		)
Ending balance	$	(0.7	)	$	(4.2	)	$	(223.6	)	$	(228.5	)

Three Months Ended September 30, 2018(a)	Gains and (Losses) on Cash Flow Hedges			Defined Benefit Pension			Foreign Currency			Total
Beginning balance	$	(0.9	)	$	(3.8	)	$	(176.2	)	$	(180.9	)
Other comprehensive income (loss) before reclassifications(b)	1.6			—			(8.9		)	(7.3		)
Amounts reclassified from accumulated other comprehensive loss	(1.3		)	—			—			(1.3		)
Net current period other comprehensive income (loss)	0.3			—			(8.9		)	(8.6		)
Ending balance	$	(0.6	)	$	(3.8	)	$	(185.1	)	$	(189.5	)

Nine Months Ended September 30, 2019(a)	Gains and (Losses) on Cash Flow Hedges			Defined Benefit Pension			Foreign Currency			Total
Beginning balance	$	(0.7	)	$	(4.5	)	$	(205.7	)	$	(210.9	)
Other comprehensive income (loss) before reclassifications(b)	1.9			—			(17.9		)	(16.0		)
Amounts reclassified from accumulated other comprehensive loss	(1.9		)	0.3			—			(1.6		)
Net current period other comprehensive income (loss)	—			0.3			(17.9		)	(17.6		)
Ending balance	$	(0.7	)	$	(4.2	)	$	(223.6	)	$	(228.5	)

Nine Months Ended September 30, 2018(a)	Gains and (Losses) on Cash Flow Hedges			Defined Benefit Pension			Foreign Currency			Total
Beginning balance	$	(0.9	)	$	(3.9	)	$	(73.1	)	$	(77.9	)
Other comprehensive income (loss) before reclassifications(b)	1.5			—			(112.0		)	(110.5		)
Amounts reclassified from accumulated other comprehensive loss	(1.0		)	0.1			—			(0.9		)
Net current period other comprehensive income (loss)	0.5			0.1			(112.0		)	(111.4		)
Reclassification of stranded tax out of AOCL to retained earnings(c)	(0.2		)	—			—			(0.2		)
Ending balance	$	(0.6	)	$	(3.8	)	$	(185.1	)	$	(189.5	)

(a) With the exception of the cumulative foreign currency translation adjustment, for which no tax effect is recorded, the changes in the components of accumulated other comprehensive loss presented in the tables above are reflected net of applicable income taxes.

(b) The Company recorded foreign exchange losses of $25.7 million and $15.3 million in the three and nine months ended September 30, 2019 and $7.9 million and $55.9 million in the three and nine months ended September 30, 2018, respectively, in accumulated other comprehensive loss related to intercompany notes which were deemed to be of a long-term investment nature.

(c)

In the first quarter of 2018, the Company adopted guidance which allows entities to reclassify tax effects of the change in U.S. income tax rates from accumulated other comprehensive loss to retained earnings.

Summary of Reclassifications out of Accumulated Other Comprehensive Income

The amounts reclassified from AOCL to expense for the three and nine months ended September 30, 2019 and 2018, are shown below (in millions):

	Amount Reclassified from AOCL
	Three Months Ended September 30, 2019			Nine Months Ended September 30, 2019			Line Item Impacted in the Consolidated Statements of Operations
Gains (losses) on cash flow hedges:
Natural gas instruments	$	(0.4	)	$	(0.6	)	Product cost
Foreign currency contracts	(2.1		)	(2.2		)	Interest expense
Income tax expense	0.8			0.9
Reclassifications, net of income taxes	(1.7		)	(1.9		)
Amortization of defined benefit pension:
Amortization of loss	$	0.1		$	0.3		Product cost
Reclassifications, net of income taxes	0.1			0.3
Total reclassifications, net of income taxes	$	(1.6	)	$	(1.6	)

	Amount Reclassified from AOCL
	Three Months Ended September 30, 2018			Nine Months Ended September 30, 2018			Line Item Impacted in the Consolidated Statements of Operations
Gains (losses) on cash flow hedges:
Natural gas instruments	$	0.2		$	0.4		Product cost
Foreign currency contracts	(2.2		)	(2.0		)	Interest expense
Income tax expense	0.7			0.6
Reclassifications, net of income taxes	(1.3		)	(1.0		)
Amortization of defined benefit pension:
Amortization of loss	$	—		$	0.1		Product cost
Reclassifications, net of income taxes	—			0.1
Total reclassifications, net of income taxes	$	(1.3	)	$	(0.9	)

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Unrealized gain from change in pension obligations, tax	$ 0.0	$ 0.0	$ 0.0	$ 0.0
Unrealized gain on cash flow hedges, tax	$ (0.1)	$ (0.1)	$ 0.0	$ (0.1)

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Leases - Schedule of Operating and Finance Lease Maturities (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Operating Leases, After Adoption of 842
Remainder of 2019	$ 4.6
2020	12.7
2021	7.4
2022	4.9
2023	3.9
After 2023	14.0
Total lease payments	47.5
Less: Interest	(7.4)
Present value of lease liabilities	40.1
Finance Leases, After Adoption of 842
Remainder of 2019	0.5
2020	1.6
2021	1.2
2022	1.0
2023	1.0
After 2023	4.3
Total lease payments	9.6
Less: Interest	(2.2)
Present value of lease liabilities	7.4
Total, After Adoption of 842
Remainder of 2019	5.1
2020	14.3
2021	8.6
2022	5.9
2023	4.9
After 2023	18.3
Total lease payments	57.1
Less: Interest	(9.6)
Present value of lease liabilities	$ 47.5
Operating Leases, Before Adoption of 842
2019		$ 16.4
2020		10.6
2021		5.7
2022		4.4
2023		3.6
After 2023		14.3
Total lease payments		55.0
Capital Leases, Before Adoption of 842
2019		2.3
2020		1.8
2021		1.3
2022		1.1
2023		1.1
After 2023		4.6
Total lease payments		12.2
Total, Before Adoption of 842
2019		18.7
2020		12.4
2021		7.0
2022		5.5
2023		4.7
After 2023		18.9
Total lease payments		$ 67.2

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Leases

9 Months Ended

Sep. 30, 2019

Leases [Abstract]

Leases

Leases:

In February 2016, the FASB issued guidance which requires lessees to recognize on their balance sheet a right-of-use asset which represents a lessee’s right to use the underlying asset and a lease liability which represents a lessee’s obligation to make lease payments for the right to use the asset. In addition, the guidance requires expanded qualitative and quantitative disclosures. The Company has adopted this guidance beginning in the first quarter of 2019, using a modified retrospective transition method, which required the cumulative effect of this change in accounting of $0.1 million to be recorded as an adjustment to beginning retained earnings. The Company’s 2018 consolidated financial statements were not recast under the new guidance and therefore, these amounts are not presented. The Company elected the package of transition provisions available for existing contracts, which allowed entities to carryforward the historical assessment of whether the contract contained a lease and the lease classification.

The Company enters into leases for warehouses and depots, rail cars, vehicles, mobile equipment, office space and certain other types of property and equipment. The Company determines whether an arrangement is or contains a lease at the inception of the contract. The right-of-use asset and lease liability are recognized based on the present value of the future minimum lease payments over the estimated lease term. Lease expense for minimum lease payments is recognized on a straight-line basis over the lease term. The Company estimates its incremental borrowing rate for each lease based upon the estimated lease term, the type of asset and the location of the leased asset. The most significant judgments in the application of the FASB guidance include whether a contract contains a lease and the lease term.

Leases with an initial term of 12 months or less are not recorded on the Company’s Consolidated Balance Sheets. The Company recognizes lease expense for these short-term leases on a straight-line basis over the lease term. Many of the Company’s leases include one or more options to renew and extend the initial lease term. The exercise of lease renewal options is generally at the Company’s discretion. The lease term includes renewal periods in only those instances in which the Company determines it is reasonably assured of renewal.

The depreciable life of assets and leasehold improvements are limited by the expected lease term, unless there is a transfer of title or purchase option reasonably certain of exercise. In these instances, the assets are depreciated over the useful life of the asset.

The Company has elected the practical expedient available under the FASB guidance to not separate lease and nonlease components on all of its lease categories. As a result, many of the Company’s leases include variable payments for services (such as handling or storage) or payments based on the usage of the asset. In addition, certain of the Company’s lease agreements include rental payments that are adjusted periodically for inflation. The Company’s lease agreements do not contain any material residual value guarantees or any material restrictive covenants. The Company’s sublease income is immaterial.

The Company’s Consolidated Balance Sheets includes the following (in millions):

	Consolidated Balance Sheets Location	September 30, 2019
Assets
Operating lease assets	Other assets	$	39.9
Finance lease assets	Property, plant and equipment, net	5.8
Total leased assets		$	45.7
Liabilities
Current liabilities:
Operating	Accrued expenses and other current liabilities	$	13.4
Finance	Accrued expenses and other current liabilities	1.2
Noncurrent liabilities:
Operating	Other noncurrent liabilities	26.7
Finance	Other noncurrent liabilities	6.2
Total lease liabilities		$	47.5

The Company’s components of lease cost are as follows (in millions):

	Three Months Ended September 30, 2019		Nine Months Ended September 30, 2019
Finance lease cost:
Amortization of lease assets	$	0.3	$	0.9
Interest on lease liabilities	0.1		0.4
Operating lease cost	4.5		14.2
Variable lease cost(a)	3.6		13.6
Net lease cost	$	8.5	$	29.1

(a) Short-term leases are immaterial and included in variable lease cost.

Maturities of lease liabilities under the new guidance (“Topic 842”) are as follows (in millions):

Topic 842
September 30, 2019	Operating Leases			Finance Leases			Total
Remainder of 2019	$	4.6		$	0.5		$	5.1
2020	12.7			1.6			14.3
2021	7.4			1.2			8.6
2022	4.9			1.0			5.9
2023	3.9			1.0			4.9
After 2023	14.0			4.3			18.3
Total lease payments	47.5			9.6			57.1
Less: Interest	(7.4		)	(2.2		)	(9.6		)
Present value of lease liabilities	$	40.1		$	7.4		$	47.5

The Company’s annual aggregate future minimum annual rental payments under the previous guidance (“Topic 840”) as of December 31, 2018 were as follows (in millions):

Topic 840
December 31, 2018	Operating Leases		Finance Leases		Total
2019	$	16.4	$	2.3	$	18.7
2020	10.6		1.8		12.4
2021	5.7		1.3		7.0
2022	4.4		1.1		5.5
2023	3.6		1.1		4.7
After 2023	14.3		4.6		18.9
Total lease payments	$	55.0	$	12.2	$	67.2

Supplemental lease term and discount rate information related to leases is as follows:

	September 30, 2019
Weighted-average remaining lease term (years)
Operating leases	6.3
Finance leases	7.3
Weighted-average discount rate
Operating leases	4.7	%
Finance leases	7.5	%

Supplemental cash flow information related to leases is as follows (in millions):

	Nine Months Ended September 30, 2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$	14.2
Operating cash flows from finance leases	0.4
Financing cash flows from finance leases	0.9
Leased assets obtained in exchange for new operating lease liabilities	2.8
Leased assets obtained in exchange for new finance lease liabilities	0.1

Leases

Leases:

In February 2016, the FASB issued guidance which requires lessees to recognize on their balance sheet a right-of-use asset which represents a lessee’s right to use the underlying asset and a lease liability which represents a lessee’s obligation to make lease payments for the right to use the asset. In addition, the guidance requires expanded qualitative and quantitative disclosures. The Company has adopted this guidance beginning in the first quarter of 2019, using a modified retrospective transition method, which required the cumulative effect of this change in accounting of $0.1 million to be recorded as an adjustment to beginning retained earnings. The Company’s 2018 consolidated financial statements were not recast under the new guidance and therefore, these amounts are not presented. The Company elected the package of transition provisions available for existing contracts, which allowed entities to carryforward the historical assessment of whether the contract contained a lease and the lease classification.

The Company enters into leases for warehouses and depots, rail cars, vehicles, mobile equipment, office space and certain other types of property and equipment. The Company determines whether an arrangement is or contains a lease at the inception of the contract. The right-of-use asset and lease liability are recognized based on the present value of the future minimum lease payments over the estimated lease term. Lease expense for minimum lease payments is recognized on a straight-line basis over the lease term. The Company estimates its incremental borrowing rate for each lease based upon the estimated lease term, the type of asset and the location of the leased asset. The most significant judgments in the application of the FASB guidance include whether a contract contains a lease and the lease term.

Leases with an initial term of 12 months or less are not recorded on the Company’s Consolidated Balance Sheets. The Company recognizes lease expense for these short-term leases on a straight-line basis over the lease term. Many of the Company’s leases include one or more options to renew and extend the initial lease term. The exercise of lease renewal options is generally at the Company’s discretion. The lease term includes renewal periods in only those instances in which the Company determines it is reasonably assured of renewal.

The depreciable life of assets and leasehold improvements are limited by the expected lease term, unless there is a transfer of title or purchase option reasonably certain of exercise. In these instances, the assets are depreciated over the useful life of the asset.

The Company has elected the practical expedient available under the FASB guidance to not separate lease and nonlease components on all of its lease categories. As a result, many of the Company’s leases include variable payments for services (such as handling or storage) or payments based on the usage of the asset. In addition, certain of the Company’s lease agreements include rental payments that are adjusted periodically for inflation. The Company’s lease agreements do not contain any material residual value guarantees or any material restrictive covenants. The Company’s sublease income is immaterial.

The Company’s Consolidated Balance Sheets includes the following (in millions):

	Consolidated Balance Sheets Location	September 30, 2019
Assets
Operating lease assets	Other assets	$	39.9
Finance lease assets	Property, plant and equipment, net	5.8
Total leased assets		$	45.7
Liabilities
Current liabilities:
Operating	Accrued expenses and other current liabilities	$	13.4
Finance	Accrued expenses and other current liabilities	1.2
Noncurrent liabilities:
Operating	Other noncurrent liabilities	26.7
Finance	Other noncurrent liabilities	6.2
Total lease liabilities		$	47.5

The Company’s components of lease cost are as follows (in millions):

	Three Months Ended September 30, 2019		Nine Months Ended September 30, 2019
Finance lease cost:
Amortization of lease assets	$	0.3	$	0.9
Interest on lease liabilities	0.1		0.4
Operating lease cost	4.5		14.2
Variable lease cost(a)	3.6		13.6
Net lease cost	$	8.5	$	29.1

(a) Short-term leases are immaterial and included in variable lease cost.

Maturities of lease liabilities under the new guidance (“Topic 842”) are as follows (in millions):

Topic 842
September 30, 2019	Operating Leases			Finance Leases			Total
Remainder of 2019	$	4.6		$	0.5		$	5.1
2020	12.7			1.6			14.3
2021	7.4			1.2			8.6
2022	4.9			1.0			5.9
2023	3.9			1.0			4.9
After 2023	14.0			4.3			18.3
Total lease payments	47.5			9.6			57.1
Less: Interest	(7.4		)	(2.2		)	(9.6		)
Present value of lease liabilities	$	40.1		$	7.4		$	47.5

The Company’s annual aggregate future minimum annual rental payments under the previous guidance (“Topic 840”) as of December 31, 2018 were as follows (in millions):

Topic 840
December 31, 2018	Operating Leases		Finance Leases		Total
2019	$	16.4	$	2.3	$	18.7
2020	10.6		1.8		12.4
2021	5.7		1.3		7.0
2022	4.4		1.1		5.5
2023	3.6		1.1		4.7
After 2023	14.3		4.6		18.9
Total lease payments	$	55.0	$	12.2	$	67.2

Supplemental lease term and discount rate information related to leases is as follows:

	September 30, 2019
Weighted-average remaining lease term (years)
Operating leases	6.3
Finance leases	7.3
Weighted-average discount rate
Operating leases	4.7	%
Finance leases	7.5	%

Supplemental cash flow information related to leases is as follows (in millions):

	Nine Months Ended September 30, 2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$	14.2
Operating cash flows from finance leases	0.4
Financing cash flows from finance leases	0.9
Leased assets obtained in exchange for new operating lease liabilities	2.8
Leased assets obtained in exchange for new finance lease liabilities	0.1

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Income Taxes

9 Months Ended

Sep. 30, 2019

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes:

The Company’s effective income tax rate differs from the U.S. statutory federal income tax rate primarily due to U.S. statutory depletion, state income taxes (net of federal tax benefit), foreign income, mining and withholding taxes, global intangible low-taxed income and interest expense recognition differences for book and tax purposes. The Company’s effective rate is impacted by permanent tax deductions which have a less favorable impact as pretax income increases.

The Company had $22.4 million and $27.2 million as of September 30, 2019 and December 31, 2018, respectively, of gross foreign federal net operating loss (“NOL”) carryforwards that have no expiration date. In addition, the Company had $1.2 million of gross foreign federal NOL carryforwards as of September 30, 2019 and December 31, 2018, which expire beginning in 2033 and $0.2 million of net operating tax-effected state NOL carryforwards as of September 30, 2019 and December 31, 2018, which expire beginning in 2027.

Canadian provincial tax authorities have challenged tax positions claimed by one of the Company’s Canadian subsidiaries and have issued tax reassessments for years 2002-2014. The reassessments are a result of ongoing audits and total $126.2 million, including interest, through September 30, 2019. The Company disputes these reassessments and will continue to work with the appropriate authorities in Canada to resolve the dispute. There is a reasonable possibility that the ultimate resolution of this dispute, and any related disputes for other open tax years, may be materially higher or lower than the amounts the Company has reserved for such disputes. In connection with this dispute, local regulations require the Company to post security with the tax authority

until the dispute is resolved. The Company has posted collateral in the form of a $90.2 million performance bond and has paid $37.4 million to the Canadian tax authorities (most of which is recorded in other assets in the Consolidated Balance Sheets).

The Company expects that it will be required by local regulations to provide security for additional interest on the above unresolved disputed amounts and for any future reassessments issued by these Canadian tax authorities in the form of cash, letters of credit, performance bonds, asset liens or other arrangements agreeable with the tax authorities until the disputes are resolved.

The Company expects that the ultimate outcome of these matters will not have a material impact on its results of operations or financial condition. However, the Company can provide no assurance as to the ultimate outcome of these matters, and the impact could be material if they are not resolved in the Company’s favor. As of September 30, 2019, the Company believes it has adequately reserved for these reassessments.

Additionally, the Company has other uncertain tax positions as well as assessments and disputed positions with taxing authorities in its various jurisdictions, which are consistent with those matters disclosed in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018.

Settlements

In the fourth quarter of 2017, the Company, the Canadian Revenue Authority (“CRA”) and the U.S. Internal Revenue Service (“IRS”) reached a settlement agreement on transfer pricing issues for the Company’s 2007-2012 tax years. As a result of this settlement agreement, the Company recognized $13.8 million of tax expense in its 2017 Consolidated Statements of Operations related to the Company’s Canadian tax positions for the years 2007-2016. During 2018, in accordance with the settlement agreement, the Company’s U.S. subsidiary made intercompany cash payments of $85.7 million to its Canadian subsidiary and tax payments to Canadian taxing authorities of $17.5 million. Tax payments of $5.7 million were made during the first and second quarters of 2019, leaving an outstanding balance of $1.3 million as of September 30, 2019. Corresponding tax refunds of $3.4 million have been received as of September 30, 2019 from U.S. taxing authorities, with the remaining refund of approximately $19.5 million expected in late 2019 (recorded in other current assets in the Consolidated Balance Sheets).

In the fourth quarter of 2018, the Company, the CRA and the IRS reached a settlement agreement on transfer pricing and management fees as part of an advanced pricing agreement that covers tax years 2013-2021. The tax expense was previously recognized in 2017. During the second quarter of 2019, in accordance with the settlement agreement, the Company’s U.S. subsidiary made intercompany cash payments of $106.1 million to its Canadian subsidiary and tax payments to Canadian taxing authorities of $29.9 million. Corresponding tax refunds of $4.0 million were received during 2019 from U.S. taxing authorities, with the remaining $57.4 million expected in early 2020 (recorded in other current assets in its Consolidated Balance Sheets).

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Fair Value Measurement - Narrative (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Senior Notes | 4.875% Senior Notes due July 2024
Debt Instrument [Line Items]
Interest rate stated percentage	4.875%	4.875%
Fair value of senior notes	$ 246,300,000	$ 226,300,000
Aggregate principal amount due at maturity	250,000,000.0	250,000,000.0
Term Loan
Debt Instrument [Line Items]
Aggregate principal amount due at maturity	1,070,000,000.00	1,030,000,000.00
Fair value of credit agreement debt	1,060,000,000.00	1,020,000,000.00
Fair Value, Measurements, Recurring
Debt Instrument [Line Items]
Mutual fund investments in a non-qualified savings plan	1,400,000	1,800,000
Fair Value, Measurements, Recurring | Level One
Debt Instrument [Line Items]
Mutual fund investments in a non-qualified savings plan	$ 1,400,000	$ 1,800,000

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Stockholders' Equity and Equity Instruments - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	May 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reissued shares of treasury stock (in shares)			7,503
Treasury stock reissued (in shares)					25,955
Shares withheld related to vesting of restricted stock units (in shares)			9,263
Fair value of stock withheld related to vesting of restricted stock units	$ 0.1	$ 0.2	$ 0.3
Tax deficiency from equity compensation awards recorded as an increase to income tax expense			0.6
Compensation expense recorded during period pursuant to stock-based compensation plans			5.1	$ 3.6
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Share-based Liabilities Paid			$ 1.1
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			4 years
Options expiration period			7 years
Number of shares available from conversion (in shares)			1
Reissued shares of treasury stock (in shares)			0
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available from conversion (in shares)			1
Service period			3 years
Reissued shares of treasury stock (in shares)			32,630
TSR PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period of PSUs			3 years
TSR PSUs | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares earned			0.00%
TSR PSUs | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares earned			150.00%
ROIC PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period of PSUs			3 years
ROIC PSUs | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares earned			0.00%
ROIC PSUs | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares earned			200.00%
PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reissued shares of treasury stock (in shares)			0
2015 Incentive Award Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for issuance (in shares)						3,000,000

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Stockholders' Equity and Equity Instruments - Reclassifications From AOCL (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ (17.7)	$ (15.9)	$ (50.7)	$ (44.5)
Income tax expense	4.8	1.7	5.3	1.0
Net earnings	10.6	12.8	6.4	17.8
Product cost
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Product cost	(210.5)	(199.2)	(580.1)	(606.0)
Amount Reclassified from AOCL
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net earnings	(1.6)	(1.3)	(1.6)	(0.9)
Amount Reclassified from AOCL | Gains (losses) on cash flow hedges:
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense	0.8	0.7	0.9	0.6
Net earnings	(1.7)	(1.3)	(1.9)	(1.0)
Amount Reclassified from AOCL | Amortization of defined benefit pension:
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net earnings	0.1	0.0	0.3	0.1
Amount Reclassified from AOCL | Amortization of defined benefit pension: | Product cost
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Product cost	0.1	0.0	0.3	0.1
Natural gas instruments | Amount Reclassified from AOCL | Gains (losses) on cash flow hedges:
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Product cost	(0.4)	0.2	(0.6)	0.4
Foreign currency contracts | Amount Reclassified from AOCL | Gains (losses) on cash flow hedges:
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ (2.1)	$ (2.2)	$ (2.2)	$ (2.0)

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Leases - Operating and Finance Leases by Income Statement Location (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Leases [Abstract]
Amortization of lease assets	$ 0.3	$ 0.9
Interest on lease liabilities	0.1	0.4
Operating lease cost	4.5	14.2
Variable lease cost	3.6	13.6
Net lease cost	$ 8.5	$ 29.1

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Earnings per Share (Tables)

9 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

Summary of Basic and Diluted Earnings Per Common Share

The following table sets forth the computation of basic and diluted earnings per common share (in millions, except for share and per-share data):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2019			2018			2019			2018
Numerator:
Net earnings	$	10.6		$	12.8		$	6.4		$	17.8
Less: net earnings allocated to participating securities(a)	(0.2		)	(0.1		)	(0.7		)	(0.3		)
Net earnings available to common shareholders	$	10.4		$	12.7		$	5.7		$	17.5
Denominator (in thousands):
Weighted-average common shares outstanding, shares for basic earnings per share	33,884			33,851			33,880			33,846
Weighted-average awards outstanding(b)	—			—			—			—
Shares for diluted earnings per share	33,884			33,851			33,880			33,846
Net earnings per common share, basic	$	0.31		$	0.37		$	0.17		$	0.52
Net earnings per common share, diluted	$	0.31		$	0.37		$	0.17		$	0.51

(a) Weighted participating securities include RSUs and PSUs that receive non-forfeitable dividends and consist of 321,000 and 291,000 weighted participating securities for the three and nine months ended September 30, 2019, respectively, and 193,000 and 183,000 weighted participating securities for the three and nine months ended September 30, 2018, respectively.

(b) For the calculation of diluted net earnings per share, the Company uses the more dilutive of either the treasury stock method or the two-class method to determine the weighted-average number of outstanding common shares. In addition, the Company had 1,194,000 and 1,049,000 weighted-average equity awards outstanding for the three and nine months ended September 30, 2019 and 871,000 and 802,000 weighted-average equity awards outstanding for the three and nine months ended September 30, 2018, respectively.

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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Allowance for doubtful accounts	$ 10.3	$ 9.9
Stockholders’ equity:
Common stock, par or stated value per share (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	35,367,264	35,367,264
Treasury stock, shares (in shares)	1,482,938	1,513,808

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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance at Dec. 31, 2017	$ 694.6	$ 0.4	$ 102.5	$ (2.9)	$ 672.5	$ (77.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	(2.2)				12.6	(14.8)
Stranded tax effect from tax reform	0.0				0.2	(0.2)
Dividends on common stock ($0.72 per share)	(24.4)		0.1		(24.5)
Stock-based compensation	1.1		1.1
Ending balance at Mar. 31, 2018	669.1	0.4	103.7	(2.9)	660.8	(92.9)
Beginning balance at Dec. 31, 2017	694.6	0.4	102.5	(2.9)	672.5	(77.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	(93.6)
Stranded tax effect from tax reform						(0.2)
Ending balance at Sep. 30, 2018	531.2	0.4	106.3	(2.9)	616.9	(189.5)
Beginning balance at Mar. 31, 2018	669.1	0.4	103.7	(2.9)	660.8	(92.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	(95.6)				(7.6)	(88.0)
Dividends on common stock ($0.72 per share)	(24.6)				(24.6)
Stock-based compensation	1.6		1.6
Ending balance at Jun. 30, 2018	550.5	0.4	105.3	(2.9)	628.6	(180.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	4.2				12.8	(8.6)
Dividends on common stock ($0.72 per share)	(24.4)		0.1		(24.5)
Stock-based compensation	0.9		0.9
Ending balance at Sep. 30, 2018	531.2	0.4	106.3	(2.9)	616.9	(189.5)
Beginning balance at Dec. 31, 2018	540.2	0.4	110.1	(2.9)	643.5	(210.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	22.3				7.6	14.7
Dividends on common stock ($0.72 per share)	(24.5)		0.1		(24.6)
Shares issued for stock units, net of shares withheld for taxes	(0.2)			(0.2)
Stock-based compensation	1.1		1.1
Ending balance at Mar. 31, 2019	538.8	0.4	111.3	(3.1)	626.4	(196.2)
Beginning balance at Dec. 31, 2018	540.2	0.4	110.1	(2.9)	643.5	(210.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	(11.2)
Shares issued for stock units, net of shares withheld for taxes	(0.3)
Ending balance at Sep. 30, 2019	459.5	0.4	114.8	(3.2)	576.0	(228.5)
Beginning balance at Mar. 31, 2019	538.8	0.4	111.3	(3.1)	626.4	(196.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	6.2				(11.8)	18.0
Dividends on common stock ($0.72 per share)	(24.7)		0.1		(24.8)
Shares issued for stock units, net of shares withheld for taxes	(0.1)			(0.1)
Stock-based compensation	2.7		2.7
Ending balance at Jun. 30, 2019	522.9	0.4	114.1	(3.2)	589.8	(178.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	(39.7)				10.6	(50.3)
Dividends on common stock ($0.72 per share)	(24.3)		0.1		(24.4)
Stock-based compensation	0.6		0.6
Ending balance at Sep. 30, 2019	$ 459.5	$ 0.4	$ 114.8	$ (3.2)	$ 576.0	$ (228.5)

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Operating Segments (Tables)

9 Months Ended

Sep. 30, 2019

Segment Reporting [Abstract]

Summary of Segment Information

Segment information is as follows (in millions):

Three Months Ended September 30, 2019	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate & Other(a)			Total
Sales to external customers	$	159.6	$	44.4	$	135.0	$	2.3		$	341.3
Intersegment sales	—		1.3		0.1		(1.4		)	—
Shipping and handling cost	43.4		5.8		5.2		—			54.4
Operating earnings (loss)	20.6		4.7		22.4		(17.6		)	30.1
Depreciation, depletion and amortization	14.3		11.0		6.0		2.6			33.9
Total assets (as of end of period)	959.2		572.8		683.1		114.7			2,329.8

Three Months Ended September 30, 2018	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate & Other(a)			Total
Sales to external customers	$	137.0	$	41.7	$	141.2	$	2.6		$	322.5
Intersegment sales	—		1.1		1.1		(2.2		)	—
Shipping and handling cost	41.2		5.0		5.7		—			51.9
Operating earnings (loss)	12.1		2.3		31.2		(13.0		)	32.6
Depreciation, depletion and amortization	13.7		12.8		5.0		2.5			34.0
Total assets (as of end of period)	918.5		594.5		705.4		134.6			2,353.0

Nine Months Ended September 30, 2019	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate & Other(a)			Total
Sales to external customers	$	578.6	$	129.7	$	274.8	$	7.1		$	990.2
Intersegment sales	—		4.4		2.7		(7.1		)	—
Shipping and handling cost	184.7		18.3		12.3		—			215.3
Operating earnings (loss)	87.5		7.7		21.5		(49.3		)	67.4
Depreciation, depletion and amortization	44.4		33.5		17.0		7.9			102.8

Nine Months Ended September 30, 2018	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate & Other(a)			Total
Sales to external customers	$	574.0	$	146.4	$	278.6	$	8.1		$	1,007.1
Intersegment sales	—		3.5		2.6		(6.1		)	—
Shipping and handling cost	190.1		17.6		14.1		—			221.8
Operating earnings (loss)	58.7		11.4		32.7		(40.8		)	62.0
Depreciation, depletion and amortization	42.5		37.1		16.5		7.5			103.6

Summary of Disaggregated Revenue by Product Type

Disaggregated revenue by product type is as follows (in millions):

Three Months Ended September 30, 2019	Salt		Plant Nutrition North America			Plant Nutrition South America			Corporate & Other(a)		Total
Highway Deicing Salt	$	84.2	$	—		$	—		$	—	$	84.2
Consumer & Industrial Salt	75.4		—			—			—		75.4
SOP and Specialty Plant Nutrients	—		45.7			112.2			—		157.9
Industrial Chemicals	—		—			22.9			—		22.9
Eliminations & Other	—		(1.3		)	(0.1		)	2.3		0.9
Sales to external customers	$	159.6	$	44.4		$	135.0		$	2.3	$	341.3

Three Months Ended September 30, 2018	Salt		Plant Nutrition North America			Plant Nutrition South America			Corporate & Other(a)		Total
Highway Deicing Salt	$	64.0	$	—		$	—		$	—	$	64.0
Consumer & Industrial Salt	73.0		—			—			—		73.0
SOP and Specialty Plant Nutrients	—		42.8			119.4			—		162.2
Industrial Chemicals	—		—			22.9			—		22.9
Eliminations & Other	—		(1.1		)	(1.1		)	2.6		0.4
Sales to external customers	$	137.0	$	41.7		$	141.2		$	2.6	$	322.5

Nine Months Ended September 30, 2019	Salt		Plant Nutrition North America			Plant Nutrition South America			Corporate & Other(a)		Total
Highway Deicing Salt	$	349.8	$	—		$	—		$	—	$	349.8
Consumer & Industrial Salt	228.8		—			—			—		228.8
SOP and Specialty Plant Nutrients	—		134.1			210.7			—		344.8
Industrial Chemicals	—		—			66.8			—		66.8
Eliminations & Other	—		(4.4		)	(2.7		)	7.1		—
Sales to external customers	$	578.6	$	129.7		$	274.8		$	7.1	$	990.2

Nine Months Ended September 30, 2018	Salt		Plant Nutrition North America			Plant Nutrition South America			Corporate & Other(a)		Total
Highway Deicing Salt	$	360.0	$	—		$	—		$	—	$	360.0
Consumer & Industrial Salt	214.0		—			—			—		214.0
SOP and Specialty Plant Nutrients	—		149.9			208.5			—		358.4
Industrial Chemicals	—		—			72.7			—		72.7
Eliminations & Other	—		(3.5		)	(2.6		)	8.1		2.0
Sales to external customers	$	574.0	$	146.4		$	278.6		$	8.1	$	1,007.1

(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, legal and finance functions.

Summary of Revenue by Geographic Area

The Company’s revenue by geographic area is as follows (in millions):

Revenue	Three Months Ended September 30, 2019		Nine Months Ended September 30, 2019
United States(a)	$	159.5	$	526.1
Canada	34.2		149.5
Brazil	131.7		266.4
United Kingdom	11.0		34.0
Other	4.9		14.2
Total revenue	$	341.3	$	990.2

Revenue	Three Months Ended September 30, 2018		Nine Months Ended September 30, 2018
United States(a)	$	126.0	$	498.5
Canada	33.4		157.0
Brazil	136.3		270.3
United Kingdom	17.3		64.0
Other	9.5		17.3
Total revenue	$	322.5	$	1,007.1

(a)

United States sales exclude product sold to foreign customers at U.S. ports.

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Inventories

9 Months Ended

Sep. 30, 2019

Inventory Disclosure [Abstract]

Inventories

Inventories:

Inventories consist of the following (in millions):

	September 30, 2019		December 31, 2018
Finished goods	$	271.0	$	202.2
Raw materials and supplies	66.1		64.4
Total inventories	$	337.1	$	266.6

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Long-Term Debt

9 Months Ended

Sep. 30, 2019

Debt Disclosure [Abstract]

Long-Term Debt

Long-Term Debt:

Long-term debt consists of the following (in millions):

	September 30, 2019			December 31, 2018
Term Loans due July 2021	$	822.5		$	828.9
Revolving Credit Facility due July 2021	250.4			197.0
4.875% Senior Notes due July 2024	250.0			250.0
Banco Itaú Loan due March 2019	—			2.5
Banco Scotiabank Loan due September 2019	—			10.3
Banco Rabobank Loan due November 2019	16.8			18.1
3.7% Banco Itaú loan due March 2020	15.4			15.4
Banco Itaú Loans due May 2019 to April 2020	0.1			0.8
Banco Santander loan due September 2020	—			20.6
Banco Santander loan due October 2020	15.6			16.8
Banco Rabobank loan due July 2021	16.8			—
Banco Santander loan due September 2021	19.2			—
Financiadora de Estudos e Projetos Loan due November 2023	7.4			9.3
Other	—			1.7
	1,414.2			1,371.4
Less unamortized debt issuance costs	(5.1		)	(6.7		)
Total debt	1,409.1			1,364.7
Less current portion	(50.9		)	(43.5		)
Long-term debt	$	1,358.2		$	1,321.2

In the first quarter of 2019, the Company entered into two Brazilian reais-denominated loans totaling $18.0 million which matured in July and September of 2019, respectively. These loans bore interest at 123% and 128% of CDI, respectively. In the third quarter of 2019, the Company entered into Brazilian reais-denominated loans totaling $36.0 million which mature in July and September of 2021. These loans bear interest at 120% and 141% of CDI, respectively.

During the third quarter of 2019, the Company sold approximately $8.4 million of receivables for $7.9 million in cash. The proceeds of this transaction were used to repay loans that matured in September 2019. The Company is contingently liable for up to 20.0% of the receivables balance if the counter-parties are unable to collect on these accounts.

As of September 30, 2019, the term loans and revolving credit facility under the Company’s credit agreement were secured by substantially all existing and future U.S. assets, the Goderich mine in Ontario, Canada and capital stock of certain subsidiaries.

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Stockholders' Equity and Equity Instruments - Schedule of Fair Value and Inputs Used to Calculate Fair Value for Options Granted (Details)	9 Months Ended
	Sep. 30, 2019 $ / shares
Equity [Abstract]
Fair value of options granted (in dollars per share)	$ 9.15
Exercise price (in dollars per share)	$ 54.15
Expected term (years)	4 years 6 months
Expected volatility	28.00%
Dividend yield	4.10%
Risk-free rate of return	2.30%

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Derivative Financial Instruments - Narrative (Details) MMBTU in Millions, $ in Millions			9 Months Ended
	Sep. 30, 2019 USD ($) MMBTU	Dec. 31, 2018 USD ($) MMBTU	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Feb. 28, 2018 USD ($)
Natural gas instruments
Derivatives, Fair Value [Line Items]
Notional amount (in MMBtus) | MMBTU	2.3	1.0
Net losses to be reclassified from accumulated other comprehensive loss to earnings during the next 12 months	$ 0.6
Natural gas instruments | Derivatives Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Percent of forecasted usage to be hedged	90.00%		90.00%
Maximum period which the Company hedges in advance of forecasted purchase			36 months
Foreign currency contracts | Derivatives Not Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Notional amount					$ 19.9
Forward contracts
Derivatives, Fair Value [Line Items]
Notional amount		$ 11.9
Loss on changes in fair value of derivative instruments				$ 3.5
Swap contracts | Derivatives Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Notional amount	$ 15.8		$ 15.8
Gain (loss) expected to be reclassified during the next twelve months	$ 3.2		$ 3.2

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Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Numerator:
Net earnings	$ 10.6	$ 12.8	$ 6.4	$ 17.8
Less: net earnings allocated to participating securities	(0.2)	(0.1)	(0.7)	(0.3)
Net earnings available to common shareholders	$ 10.4	$ 12.7	$ 5.7	$ 17.5
Denominator (in thousands):
Weighted-average common shares outstanding, shares for basic earnings per share (in shares)	33,884,000	33,851,000	33,880,000	33,846,000
Weighted-average awards outstanding (in shares)	0	0	0	0
Shares for diluted earnings per share (in shares)	33,884,000	33,851,000	33,880,000	33,846,000
Net earnings per common share, basic (in dollars per share)	$ 0.31	$ 0.37	$ 0.17	$ 0.52
Net earnings per common share, diluted (in dollars per share)	$ 0.31	$ 0.37	$ 0.17	$ 0.51
Participating securities (in shares)	321,000	193,000	291,000	183,000
Weighted anti-dilutive awards outstanding (in shares)	1,194,000	871,000	1,049,000	802,000

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Commitments and Contingencies (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Loss Contingencies [Line Items]
Maximum exposure for other labor matters	$ 25.0	$ 31.0
Produquímica
Loss Contingencies [Line Items]
Contingent liabilities assumed	6.0	7.8
Brazilian Tax Litigation and Assessments
Loss Contingencies [Line Items]
Amount of potential payments	$ 15.2	$ 15.9

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Goodwill and Intangible Assets, Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Goodwill [Line Items]
Aggregate amortization expense	$ 3.3	$ 3.5	$ 10.3	$ 11.4
Goodwill	332.1		332.1		$ 350.8
Other
Goodwill [Line Items]
Goodwill	5.8		5.8		5.9
Goodwill - Plant Nutrition North America Segment | Operating Segments
Goodwill [Line Items]
Goodwill	54.3		54.3		52.6
Goodwill - Plant Nutrition South America Segment | Operating Segments
Goodwill [Line Items]
Goodwill	$ 272.0		$ 272.0		$ 292.3

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Leases - Schedule of Lease Terms and Discount Rates (Details)	Sep. 30, 2019
Weighted Average Lease Term [Abstract]
Operating leases	6 years 3 months 18 days
Finance leases	7 years 3 months 18 days
Weighted Average Discount Rate [Abstract]
Operating leases	4.70%
Finance leases	7.50%

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Derivative Financial Instruments

9 Months Ended

Sep. 30, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

Derivative Financial Instruments:

The Company is subject to various types of market risks, including interest rate risk, foreign currency exchange rate transaction and translation risk and commodity pricing risk. Management may take actions to mitigate the exposure to these types of risks, including entering into forward purchase contracts and other financial instruments. Currently, the Company manages a portion of its commodity pricing and foreign currency exchange rate risks by using derivative instruments. The Company does not seek to engage in trading activities or take speculative positions with any financial instrument arrangement. The Company has entered into natural gas derivative instruments and foreign currency derivative instruments with counterparties it views as creditworthy. However, the Company does attempt to mitigate its counterparty credit risk exposures by, among other things, entering into master netting agreements with some of these counterparties. The Company records derivative financial instruments as either assets or liabilities at fair value in the Consolidated Balance Sheets.

Derivatives qualify for treatment as hedges when there is a high correlation between the change in fair value of the derivative instrument and the related change in value of the underlying hedged item. Depending on the exposure being hedged, the Company must designate the hedging instrument as a fair value hedge, a cash flow hedge or a net investment in foreign operations hedge. For the qualifying derivative instruments that have been designated as hedges, the change in fair value is recognized through earnings when the underlying transaction being hedged affects earnings, allowing a derivative’s gains and losses to offset related results from the hedged item in the statements of operations. Any ineffectiveness related to these hedges was not material for any of the periods presented. For derivative instruments that have not been designated as hedges, the entire change in fair value is recorded through earnings in the period of change.

Natural Gas Derivative Instruments

Natural gas is consumed at several of the Company’s production facilities, and changes in natural gas prices impact the Company’s operating margin. The Company’s objective is to reduce the earnings and cash flow impacts of changes in market prices of natural gas by fixing the purchase price of up to 90% of its forecasted natural gas usage. It is the Company’s policy to consider hedging portions of its natural gas usage up to 36 months in advance of the forecasted purchase. As of September 30, 2019, the Company had entered into natural gas derivative instruments to hedge a portion of its natural gas purchase requirements through December 2021. As of September 30, 2019 and December 31, 2018, the Company had agreements in place to hedge forecasted natural gas purchases of 2.3 million and 1.0 million MMBtus, respectively. All natural gas derivative instruments held by the Company as of September 30, 2019 and December 31, 2018 qualified and were designated as cash flow hedges. As of September 30, 2019, the Company expects to reclassify from accumulated other comprehensive loss to earnings during the next twelve months $0.6 million of net losses on derivative instruments related to its natural gas hedges.

Foreign Currency Derivatives Not Designated as Hedges

In February 2018, the Company entered into a forward instrument to swap currency denominated in Brazilian reais to Canadian dollars for the amounts borrowed under an intercompany note. The instrument matured in November 2018 and was for a notional amount of approximately $19.9 million U.S. dollars. The objective of the instrument was to mitigate the foreign currency fluctuation risk related to holding debt denominated in a currency other than its Brazil subsidiary’s functional currency. The instrument was not designated as a hedge. During the nine months ended September 30, 2018, the Company recognized a net gain of $3.5 million in other expense in its Consolidated Statements of Operations for this agreement.

In the latter half of 2018, the Company entered into non-deliverable forward contracts to fix $11.9 million of its net position in accounts receivable and accounts payable in Brazil that were U.S. dollar denominated. The objective of these instruments was to mitigate the foreign currency fluctuation risk related to the Company’s accounts receivable and payable denominated in a currency other than its Brazil subsidiary’s functional currency. These forward contracts were not designated as hedges. These forward contracts matured in December 2018.

Foreign Currency Derivatives Designated as Hedges

The Company has entered into U.S. dollar-denominated debt instruments to provide funds for its operations in Brazil. The Company may also concurrently enter into foreign currency agreements whereby the Company agrees to swap interest and principal payments on loans denominated in U.S. dollars for principal and interest payments denominated in Brazilian reais, its Brazil subsidiary’s functional currency. The objective of the swap agreements is to mitigate the foreign currency fluctuation risk related to holding debt denominated in a currency other than the Company’s Brazil subsidiary’s functional currency. As of September 30, 2019, the Company had a swap agreement in place to hedge $15.8 million of a loan denominated in a currency other than its Brazil subsidiary’s functional currency. Payments on this loan is due on various dates extending through March 2020. As of September 30, 2019, this foreign currency derivative instrument qualified and was designated as a cash flow hedge. As of September 30, 2019, the Company expects to reclassify from accumulated other comprehensive loss to earnings during the next twelve months $3.2 million of net gains on derivative instruments related to this foreign currency swap agreement.

The following tables present the fair value of the Company’s hedged items as of September 30, 2019 and December 31, 2018 (in millions):

	Asset Derivatives			Liability Derivatives
Derivatives designated as hedging instruments:	Consolidated Balance Sheets Location	September 30, 2019		Consolidated Balance Sheets Location	September 30, 2019
Commodity contracts	Other current assets	$	0.1	Accrued expenses and other current liabilities	$	0.7
Commodity contracts	Other assets	0.1		Other noncurrent liabilities	0.4
Swap contracts	Other current assets	3.2		Accrued expenses and other current liabilities	—
Total derivatives designated as hedging instruments(a)(b)		$	3.4		$	1.1

(a) The Company has master netting agreements with both of its commodity hedge counterparties and accordingly has netted in its Consolidated Balance Sheets the immaterial amounts receivable above.

(b) The Company has commodity hedge agreements with two counterparties and a foreign currency swap agreement with one counterparty. Amounts recorded as liabilities for the Company’s commodity contracts are payable to both counterparties and amounts recorded as assets for the Company’s foreign currency swap agreements are receivable from one counterparty. 

	Asset Derivatives			Liability Derivatives
Derivatives designated as hedging instruments:	Consolidated Balance Sheets Location	December 31, 2018		Consolidated Balance Sheets Location	December 31, 2018
Commodity contracts	Other current assets	$	—	Accrued expenses and other current liabilities	$	0.6
Swap contracts	Other current assets	2.2		Accrued expenses and other current liabilities	—
Swap contracts	Other assets	2.3		Other noncurrent liabilities	—
Total derivatives designated as hedging instruments(a)(b)		$	4.5		$	0.6

(a) The Company has master netting agreements with its commodity hedge counterparties and accordingly has netted in its Consolidated Balance Sheets less than $0.1 million of its commodity contracts that are in a receivable position against its contracts in payable positions.

(b)

The Company has both commodity hedge and foreign currency swap agreements with two counterparties each. Amounts recorded as liabilities for the Company’s commodity contracts are payable to both counterparties, and amounts recorded as assets for the Company’s foreign currency swap agreements are receivable from both counterparties.

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Leases (Tables)

9 Months Ended

Sep. 30, 2019

Leases [Abstract]

Schedule of Operating and Finance Leases by Balance Sheets Location

The Company’s Consolidated Balance Sheets includes the following (in millions):

	Consolidated Balance Sheets Location	September 30, 2019
Assets
Operating lease assets	Other assets	$	39.9
Finance lease assets	Property, plant and equipment, net	5.8
Total leased assets		$	45.7
Liabilities
Current liabilities:
Operating	Accrued expenses and other current liabilities	$	13.4
Finance	Accrued expenses and other current liabilities	1.2
Noncurrent liabilities:
Operating	Other noncurrent liabilities	26.7
Finance	Other noncurrent liabilities	6.2
Total lease liabilities		$	47.5

Schedule of Operating Lease Maturities

Maturities of lease liabilities under the new guidance (“Topic 842”) are as follows (in millions):

Topic 842
September 30, 2019	Operating Leases			Finance Leases			Total
Remainder of 2019	$	4.6		$	0.5		$	5.1
2020	12.7			1.6			14.3
2021	7.4			1.2			8.6
2022	4.9			1.0			5.9
2023	3.9			1.0			4.9
After 2023	14.0			4.3			18.3
Total lease payments	47.5			9.6			57.1
Less: Interest	(7.4		)	(2.2		)	(9.6		)
Present value of lease liabilities	$	40.1		$	7.4		$	47.5

The Company’s annual aggregate future minimum annual rental payments under the previous guidance (“Topic 840”) as of December 31, 2018 were as follows (in millions):

Topic 840
December 31, 2018	Operating Leases		Finance Leases		Total
2019	$	16.4	$	2.3	$	18.7
2020	10.6		1.8		12.4
2021	5.7		1.3		7.0
2022	4.4		1.1		5.5
2023	3.6		1.1		4.7
After 2023	14.3		4.6		18.9
Total lease payments	$	55.0	$	12.2	$	67.2

Schedule of Financing Lease Maturities

Maturities of lease liabilities under the new guidance (“Topic 842”) are as follows (in millions):

Topic 842
September 30, 2019	Operating Leases			Finance Leases			Total
Remainder of 2019	$	4.6		$	0.5		$	5.1
2020	12.7			1.6			14.3
2021	7.4			1.2			8.6
2022	4.9			1.0			5.9
2023	3.9			1.0			4.9
After 2023	14.0			4.3			18.3
Total lease payments	47.5			9.6			57.1
Less: Interest	(7.4		)	(2.2		)	(9.6		)
Present value of lease liabilities	$	40.1		$	7.4		$	47.5

The Company’s annual aggregate future minimum annual rental payments under the previous guidance (“Topic 840”) as of December 31, 2018 were as follows (in millions):

Topic 840
December 31, 2018	Operating Leases		Finance Leases		Total
2019	$	16.4	$	2.3	$	18.7
2020	10.6		1.8		12.4
2021	5.7		1.3		7.0
2022	4.4		1.1		5.5
2023	3.6		1.1		4.7
After 2023	14.3		4.6		18.9
Total lease payments	$	55.0	$	12.2	$	67.2

Schedule of Lease Cost, Lease Terms and Supplemental Cash Flow Information

Supplemental lease term and discount rate information related to leases is as follows:

	September 30, 2019
Weighted-average remaining lease term (years)
Operating leases	6.3
Finance leases	7.3
Weighted-average discount rate
Operating leases	4.7	%
Finance leases	7.5	%

Supplemental cash flow information related to leases is as follows (in millions):

	Nine Months Ended September 30, 2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$	14.2
Operating cash flows from finance leases	0.4
Financing cash flows from finance leases	0.9
Leased assets obtained in exchange for new operating lease liabilities	2.8
Leased assets obtained in exchange for new finance lease liabilities	0.1

The Company’s components of lease cost are as follows (in millions):

	Three Months Ended September 30, 2019		Nine Months Ended September 30, 2019
Finance lease cost:
Amortization of lease assets	$	0.3	$	0.9
Interest on lease liabilities	0.1		0.4
Operating lease cost	4.5		14.2
Variable lease cost(a)	3.6		13.6
Net lease cost	$	8.5	$	29.1

(a)

Short-term leases are immaterial and included in variable lease cost.

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Long-Term Debt (Tables)

9 Months Ended

Sep. 30, 2019

Debt Disclosure [Abstract]

Summary of Long-Term Debt

Long-term debt consists of the following (in millions):

	September 30, 2019			December 31, 2018
Term Loans due July 2021	$	822.5		$	828.9
Revolving Credit Facility due July 2021	250.4			197.0
4.875% Senior Notes due July 2024	250.0			250.0
Banco Itaú Loan due March 2019	—			2.5
Banco Scotiabank Loan due September 2019	—			10.3
Banco Rabobank Loan due November 2019	16.8			18.1
3.7% Banco Itaú loan due March 2020	15.4			15.4
Banco Itaú Loans due May 2019 to April 2020	0.1			0.8
Banco Santander loan due September 2020	—			20.6
Banco Santander loan due October 2020	15.6			16.8
Banco Rabobank loan due July 2021	16.8			—
Banco Santander loan due September 2021	19.2			—
Financiadora de Estudos e Projetos Loan due November 2023	7.4			9.3
Other	—			1.7
	1,414.2			1,371.4
Less unamortized debt issuance costs	(5.1		)	(6.7		)
Total debt	1,409.1			1,364.7
Less current portion	(50.9		)	(43.5		)
Long-term debt	$	1,358.2		$	1,321.2

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Operating Segments

9 Months Ended

Sep. 30, 2019

Segment Reporting [Abstract]

Operating Segments

Operating Segments:

The Company’s reportable segments are strategic business units that offer different products and services, and each business requires different technology and marketing strategies. The Company has three reportable segments: Salt, Plant Nutrition North America and Plant Nutrition South America. The Salt segment produces and markets salt, consisting of sodium chloride and magnesium chloride, for use in road deicing for winter roadway safety and for dust control, food processing, water softeners and other consumer, agricultural and industrial applications. Plant nutrients, including SOP, secondary nutrients and micronutrients are produced and marketed through the Plant Nutrition North America segment. The Plant Nutrition South America segment operates two primary businesses in Brazil – agricultural productivity and chemical solutions. The agricultural productivity division manufactures and distributes a broad offering of specialty plant nutrition solution-based products that are used in direct soil and foliar applications, as well as through irrigation systems and for seed treatment. The chemical solutions division manufactures and markets specialty chemicals for the industrial chemical industry.

Segment information is as follows (in millions):

Three Months Ended September 30, 2019	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate & Other(a)			Total
Sales to external customers	$	159.6	$	44.4	$	135.0	$	2.3		$	341.3
Intersegment sales	—		1.3		0.1		(1.4		)	—
Shipping and handling cost	43.4		5.8		5.2		—			54.4
Operating earnings (loss)	20.6		4.7		22.4		(17.6		)	30.1
Depreciation, depletion and amortization	14.3		11.0		6.0		2.6			33.9
Total assets (as of end of period)	959.2		572.8		683.1		114.7			2,329.8

Three Months Ended September 30, 2018	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate & Other(a)			Total
Sales to external customers	$	137.0	$	41.7	$	141.2	$	2.6		$	322.5
Intersegment sales	—		1.1		1.1		(2.2		)	—
Shipping and handling cost	41.2		5.0		5.7		—			51.9
Operating earnings (loss)	12.1		2.3		31.2		(13.0		)	32.6
Depreciation, depletion and amortization	13.7		12.8		5.0		2.5			34.0
Total assets (as of end of period)	918.5		594.5		705.4		134.6			2,353.0

Nine Months Ended September 30, 2019	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate & Other(a)			Total
Sales to external customers	$	578.6	$	129.7	$	274.8	$	7.1		$	990.2
Intersegment sales	—		4.4		2.7		(7.1		)	—
Shipping and handling cost	184.7		18.3		12.3		—			215.3
Operating earnings (loss)	87.5		7.7		21.5		(49.3		)	67.4
Depreciation, depletion and amortization	44.4		33.5		17.0		7.9			102.8

Nine Months Ended September 30, 2018	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate & Other(a)			Total
Sales to external customers	$	574.0	$	146.4	$	278.6	$	8.1		$	1,007.1
Intersegment sales	—		3.5		2.6		(6.1		)	—
Shipping and handling cost	190.1		17.6		14.1		—			221.8
Operating earnings (loss)	58.7		11.4		32.7		(40.8		)	62.0
Depreciation, depletion and amortization	42.5		37.1		16.5		7.5			103.6

Disaggregated revenue by product type is as follows (in millions):

Three Months Ended September 30, 2019	Salt		Plant Nutrition North America			Plant Nutrition South America			Corporate & Other(a)		Total
Highway Deicing Salt	$	84.2	$	—		$	—		$	—	$	84.2
Consumer & Industrial Salt	75.4		—			—			—		75.4
SOP and Specialty Plant Nutrients	—		45.7			112.2			—		157.9
Industrial Chemicals	—		—			22.9			—		22.9
Eliminations & Other	—		(1.3		)	(0.1		)	2.3		0.9
Sales to external customers	$	159.6	$	44.4		$	135.0		$	2.3	$	341.3

Three Months Ended September 30, 2018	Salt		Plant Nutrition North America			Plant Nutrition South America			Corporate & Other(a)		Total
Highway Deicing Salt	$	64.0	$	—		$	—		$	—	$	64.0
Consumer & Industrial Salt	73.0		—			—			—		73.0
SOP and Specialty Plant Nutrients	—		42.8			119.4			—		162.2
Industrial Chemicals	—		—			22.9			—		22.9
Eliminations & Other	—		(1.1		)	(1.1		)	2.6		0.4
Sales to external customers	$	137.0	$	41.7		$	141.2		$	2.6	$	322.5

Nine Months Ended September 30, 2019	Salt		Plant Nutrition North America			Plant Nutrition South America			Corporate & Other(a)		Total
Highway Deicing Salt	$	349.8	$	—		$	—		$	—	$	349.8
Consumer & Industrial Salt	228.8		—			—			—		228.8
SOP and Specialty Plant Nutrients	—		134.1			210.7			—		344.8
Industrial Chemicals	—		—			66.8			—		66.8
Eliminations & Other	—		(4.4		)	(2.7		)	7.1		—
Sales to external customers	$	578.6	$	129.7		$	274.8		$	7.1	$	990.2

Nine Months Ended September 30, 2018	Salt		Plant Nutrition North America			Plant Nutrition South America			Corporate & Other(a)		Total
Highway Deicing Salt	$	360.0	$	—		$	—		$	—	$	360.0
Consumer & Industrial Salt	214.0		—			—			—		214.0
SOP and Specialty Plant Nutrients	—		149.9			208.5			—		358.4
Industrial Chemicals	—		—			72.7			—		72.7
Eliminations & Other	—		(3.5		)	(2.6		)	8.1		2.0
Sales to external customers	$	574.0	$	146.4		$	278.6		$	8.1	$	1,007.1

(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, legal and finance functions.

The Company’s revenue by geographic area is as follows (in millions):

Revenue	Three Months Ended September 30, 2019		Nine Months Ended September 30, 2019
United States(a)	$	159.5	$	526.1
Canada	34.2		149.5
Brazil	131.7		266.4
United Kingdom	11.0		34.0
Other	4.9		14.2
Total revenue	$	341.3	$	990.2

Revenue	Three Months Ended September 30, 2018		Nine Months Ended September 30, 2018
United States(a)	$	126.0	$	498.5
Canada	33.4		157.0
Brazil	136.3		270.3
United Kingdom	17.3		64.0
Other	9.5		17.3
Total revenue	$	322.5	$	1,007.1

(a)

United States sales exclude product sold to foreign customers at U.S. ports.

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Revenue Recognition

9 Months Ended

Sep. 30, 2019

Revenue from Contract with Customer [Abstract]

Revenue Recognition

Revenue Recognition:

Nature of Products and Services

The Company’s Salt segment products include salt and magnesium chloride for use in road deicing and dust control, food processing, water softeners, and agricultural and industrial applications. The Company’s plant nutrition products include SOP, secondary nutrients, micronutrients and chemicals for the industrial chemical industry. In the U.K., the Company operates a records management business utilizing excavated areas of the Winsford salt mine with one other location in London, England.

Identifying the Contract

The Company accounts for a customer contract when there is approval and commitment from both parties, the rights of the parties and payment terms are identified, the contract has commercial substance and collectability of consideration is probable.

Identifying the Performance Obligations

At contract inception, the Company assesses the goods and services it has promised to its customers and identifies a performance obligation for each promise to transfer to the customer a distinct good or service (or bundle of goods or services). Determining whether products and services are considered distinct performance obligations that should be accounted for separately or aggregated together may require significant judgment.

Identifying and Allocating the Transaction Price

The Company’s revenues are measured based on consideration specified in the customer contract, net of any sales incentives and amounts collected on behalf of third parties such as sales taxes. In certain cases, the Company’s customer contracts may include promises to transfer multiple products and services to a customer. For multiple-element arrangements, the Company generally allocates the transaction price to each performance obligation in proportion to its stand-alone selling price.

When Performance Obligations Are Satisfied

The vast majority of the Company’s revenues are recognized at a point in time when the performance obligations are satisfied based upon transfer of control of the product or service to a customer. To determine when the control of goods is transferred, the Company typically assesses, among other things, the shipping terms of the contract, as shipping is an indicator of transfer of control. Some of the Company’s products are sold when the control of the goods transfers to the customer at the time of shipment. There are also instances when the Company provides shipping services to deliver its products. Shipping and handling costs that

occur before the customer obtains control of the goods are deemed to be fulfillment activities and are accounted for as fulfillment costs. The Company recognizes shipping and handling costs that are incurred after the customer obtains control of the goods as fulfillment costs which are accrued at the time of revenue recognition.

Significant Payment Terms

The customer contract states the final terms of the sale, including the description, quantity and price of each product or service purchased. Payment is typically due in full within 30 days of delivery. The Company does not adjust the consideration for the effects of a significant financing component if the Company expects, at contract inception, that the period between when the good or service is transferred to the customer and when the customer pays for that good or service will be one year or less.

Refunds, Returns and Warranties

The Company’s products are generally not sold with a right of return and the Company does not generally provide credits or incentives, which may be required to be accounted for as variable consideration when estimating the amount of revenue to be recognized. The Company uses historical experience to estimate accruals for refunds due to manufacturing or other defects.

See Note 10 for disaggregation of revenue by segment, type and geographical region.

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Goodwill and Intangible Assets, Net

9 Months Ended

Sep. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets, Net

Goodwill and Intangible Assets, Net:

Amounts related to the Company’s amortization of intangible assets are as follows (in millions):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Aggregate amortization expense	$	3.3	$	3.5	$	10.3	$	11.4

Amounts related to the Company’s goodwill are as follows (in millions):

	September 30, 2019		December 31, 2018
Goodwill - Plant Nutrition North America Segment	$	54.3	$	52.6
Goodwill - Plant Nutrition South America Segment	272.0		292.3
Other	5.8		5.9
Total	$	332.1	$	350.8

The change in goodwill between December 31, 2018 and September 30, 2019 was due to the impact from translating foreign-denominated amounts to U.S. dollars.

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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net earnings	$ 6.4	$ 17.8
Adjustments to reconcile net earnings to net cash flows provided by operating activities:
Depreciation, depletion and amortization	102.8	103.6
Finance fee amortization	2.1	1.6
Stock-based compensation	4.0	3.6
Deferred income taxes	(10.2)	(0.3)
Net earnings in equity method investee	(0.4)	(0.9)
Unrealized foreign exchange loss	2.0	9.5
Other, net	6.2	3.2
Changes in operating assets and liabilities:
Receivables	90.0	116.2
Inventories	(75.2)	(61.1)
Other assets	4.8	(36.0)
Accounts payable and accrued expenses and other current liabilities	(26.3)	8.3
Other liabilities	(14.8)	(0.1)
Net cash provided by operating activities	91.4	165.4
Cash flows from investing activities:
Capital expenditures	(71.6)	(72.2)
Other, net	(1.6)	(2.3)
Net cash used in investing activities	(73.2)	(74.5)
Cash flows from financing activities:
Proceeds from revolving credit facility borrowings	288.8	348.4
Principal payments on revolving credit facility borrowings	(235.4)	(333.3)
Proceeds from issuance of long-term debt	58.1	36.2
Principal payments on long-term debt	(62.2)	(62.6)
Dividends paid	(73.6)	(73.4)
Deferred financing costs	(0.3)	(0.3)
Shares withheld to satisfy employee tax obligations	(0.3)	0.0
Other, net	(0.9)	(0.7)
Net cash used in financing activities	(25.8)	(85.7)
Effect of exchange rate changes on cash and cash equivalents	4.5	(5.7)
Net change in cash and cash equivalents	(3.1)	(0.5)
Cash and cash equivalents, beginning of the year	27.0	36.6
Cash and cash equivalents, end of period	23.9	36.1
Supplemental cash flow information:
Interest paid, net of amounts capitalized	47.6	41.4
Income taxes paid, net of refunds	$ 48.6	$ 32.3

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Cover Page - shares	9 Months Ended
	Sep. 30, 2019	Nov. 01, 2019
Cover page.
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2019
Document Transition Report	false
Entity File Number	001-31921
Entity Registrant Name	Compass Minerals International, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	36-3972986
Entity Address, Address Line One	9900 West 109th Street
Entity Address, Address Line Two	Suite 100
Entity Address, City or Town	Overland Park
Entity Address, State or Province	KS
Entity Address, Postal Zip Code	66210
City Area Code	913
Local Phone Number	344-9200
Title of 12(b) Security	Common stock, $0.01 par value
Trading Symbol	CMP
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		33,884,326
Entity Central Index Key	0001227654
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Amendment Flag	false

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Leases - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect to retained earnings from change in accounting principle	$ (576.0)		$ (643.5)
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect to retained earnings from change in accounting principle		$ 0.1

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Derivative Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Summary of Fair Value of Hedges

The following tables present the fair value of the Company’s hedged items as of September 30, 2019 and December 31, 2018 (in millions):

	Asset Derivatives			Liability Derivatives
Derivatives designated as hedging instruments:	Consolidated Balance Sheets Location	September 30, 2019		Consolidated Balance Sheets Location	September 30, 2019
Commodity contracts	Other current assets	$	0.1	Accrued expenses and other current liabilities	$	0.7
Commodity contracts	Other assets	0.1		Other noncurrent liabilities	0.4
Swap contracts	Other current assets	3.2		Accrued expenses and other current liabilities	—
Total derivatives designated as hedging instruments(a)(b)		$	3.4		$	1.1

(a) The Company has master netting agreements with both of its commodity hedge counterparties and accordingly has netted in its Consolidated Balance Sheets the immaterial amounts receivable above.

(b) The Company has commodity hedge agreements with two counterparties and a foreign currency swap agreement with one counterparty. Amounts recorded as liabilities for the Company’s commodity contracts are payable to both counterparties and amounts recorded as assets for the Company’s foreign currency swap agreements are receivable from one counterparty. 

	Asset Derivatives			Liability Derivatives
Derivatives designated as hedging instruments:	Consolidated Balance Sheets Location	December 31, 2018		Consolidated Balance Sheets Location	December 31, 2018
Commodity contracts	Other current assets	$	—	Accrued expenses and other current liabilities	$	0.6
Swap contracts	Other current assets	2.2		Accrued expenses and other current liabilities	—
Swap contracts	Other assets	2.3		Other noncurrent liabilities	—
Total derivatives designated as hedging instruments(a)(b)		$	4.5		$	0.6

(a) The Company has master netting agreements with its commodity hedge counterparties and accordingly has netted in its Consolidated Balance Sheets less than $0.1 million of its commodity contracts that are in a receivable position against its contracts in payable positions.

(b)

The Company has both commodity hedge and foreign currency swap agreements with two counterparties each. Amounts recorded as liabilities for the Company’s commodity contracts are payable to both counterparties, and amounts recorded as assets for the Company’s foreign currency swap agreements are receivable from both counterparties. 

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net earnings	$ 10.6	$ 12.8	$ 6.4	$ 17.8
Other comprehensive income (loss):
Unrealized gain from change in pension obligations, net of tax of $(0.0) in both the three and nine months ended September 30, 2019 and 2018, respectively	0.1	0.0	0.3	0.1
Unrealized gain on cash flow hedges, net of tax of $(0.1) and $(0.0) in the three and nine months ended September 30, 2019, respectively, and $(0.1) in both the three and nine months ended September 30, 2018	0.3	0.3	0.0	0.5
Cumulative translation adjustment	(50.7)	(8.9)	(17.9)	(112.0)
Comprehensive (loss) income	$ (39.7)	$ 4.2	$ (11.2)	$ (93.6)

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Stockholders' Equity and Equity Instruments - Components and Changes In AOCL (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 522.9	$ 550.5	$ 694.6	$ 540.2	$ 694.6
Other comprehensive income (loss) before reclassifications	(48.7)	(7.3)		(16.0)	(110.5)
Amounts reclassified from accumulated other comprehensive loss	(1.6)	(1.3)		(1.6)	(0.9)
Net current period other comprehensive income (loss)	(50.3)	(8.6)		(17.6)	(111.4)
Reclassification of stranded tax out of AOCL to retained earnings			0.0
Ending balance	459.5	531.2	669.1	459.5	531.2
Gains (loss) on foreign exchange of intercompany notes of long-term nature	(25.7)	(7.9)		(15.3)	(55.9)
Gains and (Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(1.0)	(0.9)	(0.9)	(0.7)	(0.9)
Other comprehensive income (loss) before reclassifications	2.0	1.6		1.9	1.5
Amounts reclassified from accumulated other comprehensive loss	(1.7)	(1.3)		(1.9)	(1.0)
Net current period other comprehensive income (loss)	0.3	0.3		0.0	0.5
Reclassification of stranded tax out of AOCL to retained earnings					(0.2)
Ending balance	(0.7)	(0.6)		(0.7)	(0.6)
Defined Benefit Pension
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(4.3)	(3.8)	(3.9)	(4.5)	(3.9)
Other comprehensive income (loss) before reclassifications	0.0	0.0		0.0	0.0
Amounts reclassified from accumulated other comprehensive loss	0.1	0.0		0.3	0.1
Net current period other comprehensive income (loss)	0.1	0.0		0.3	0.1
Reclassification of stranded tax out of AOCL to retained earnings					0.0
Ending balance	(4.2)	(3.8)		(4.2)	(3.8)
Foreign Currency
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(172.9)	(176.2)	(73.1)	(205.7)	(73.1)
Other comprehensive income (loss) before reclassifications	(50.7)	(8.9)		(17.9)	(112.0)
Amounts reclassified from accumulated other comprehensive loss	0.0	0.0		0.0	0.0
Net current period other comprehensive income (loss)	(50.7)	(8.9)		(17.9)	(112.0)
Reclassification of stranded tax out of AOCL to retained earnings					0.0
Ending balance	(223.6)	(185.1)		(223.6)	(185.1)
Total
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(178.2)	(180.9)	(77.9)	(210.9)	(77.9)
Reclassification of stranded tax out of AOCL to retained earnings			(0.2)		(0.2)
Ending balance	$ (228.5)	$ (189.5)	$ (92.9)	$ (228.5)	$ (189.5)

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Fair Value Measurements - Summary of Estimated Fair Values (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Mutual Fund Investments, Concentration Risk | Common Stock, Large Cap US Companies
Liability Class:
Concentration risk percentage	30.00%	25.00%
Mutual Fund Investments, Concentration Risk | Common Stock of Small to Mid Cap US Companies
Liability Class:
Concentration risk percentage	15.00%	15.00%
Mutual Fund Investments, Concentration Risk | Common Stock, International Companies
Liability Class:
Concentration risk percentage	5.00%	5.00%
Mutual Fund Investments, Concentration Risk | Bond Funds
Liability Class:
Concentration risk percentage	10.00%	20.00%
Mutual Fund Investments, Concentration Risk | Short-Term Investments
Liability Class:
Concentration risk percentage	20.00%	15.00%
Mutual Fund Investments, Concentration Risk | Blended Funds
Liability Class:
Concentration risk percentage	20.00%	20.00%
Fair Value, Measurements, Recurring
Asset Class:
Mutual fund investments in a non-qualified savings plan	$ 1.4	$ 1.8
Derivatives – foreign currency contracts, net	3.2	4.5
Total Assets	4.6	6.3
Liability Class:
Liabilities related to non-qualified savings plan	(1.4)	(1.8)
Derivatives – natural gas instruments, net	(0.9)	(0.6)
Total Liabilities	(2.3)	(2.4)
Fair Value, Measurements, Recurring | Level One
Asset Class:
Mutual fund investments in a non-qualified savings plan	1.4	1.8
Derivatives – foreign currency contracts, net	0.0	0.0
Total Assets	1.4	1.8
Liability Class:
Liabilities related to non-qualified savings plan	(1.4)	(1.8)
Derivatives – natural gas instruments, net	0.0	0.0
Total Liabilities	(1.4)	(1.8)
Fair Value, Measurements, Recurring | Level Two
Asset Class:
Mutual fund investments in a non-qualified savings plan	0.0	0.0
Derivatives – foreign currency contracts, net	3.2	4.5
Total Assets	3.2	4.5
Liability Class:
Liabilities related to non-qualified savings plan	0.0	0.0
Derivatives – natural gas instruments, net	(0.9)	(0.6)
Total Liabilities	(0.9)	(0.6)
Fair Value, Measurements, Recurring | Level Three
Asset Class:
Mutual fund investments in a non-qualified savings plan	0.0	0.0
Derivatives – foreign currency contracts, net	0.0	0.0
Total Assets	0.0	0.0
Liability Class:
Liabilities related to non-qualified savings plan	0.0	0.0
Derivatives – natural gas instruments, net	0.0	0.0
Total Liabilities	$ 0.0	$ 0.0

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Long-Term Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Long-term debt, gross	$ 1,414.2	$ 1,371.4
Less unamortized debt issuance costs	(5.1)	(6.7)
Total debt	1,409.1	1,364.7
Less current portion	(50.9)	(43.5)
Long-term debt	1,358.2	1,321.2
Banco Itaú Loan due March 2019
Debt Instrument [Line Items]
Long-term debt, gross	0.0	2.5
Banco Scotiabank Loan due September 2019
Debt Instrument [Line Items]
Long-term debt, gross	0.0	10.3
Banco Rabobank Loan due November 2019
Debt Instrument [Line Items]
Long-term debt, gross	16.8	18.1
3.7% Banco Itaú loan due March 2020
Debt Instrument [Line Items]
Long-term debt, gross	$ 15.4	15.4
Interest rate stated percentage	3.70%
Banco Itaú Loans due May 2019 to April 2020
Debt Instrument [Line Items]
Long-term debt, gross	$ 0.1	0.8
Banco Santander loan due September 2020
Debt Instrument [Line Items]
Long-term debt, gross	0.0	20.6
Banco Santander loan due October 2020
Debt Instrument [Line Items]
Long-term debt, gross	15.6	16.8
Banco Rabobank loan due July 2021
Debt Instrument [Line Items]
Long-term debt, gross	16.8	0.0
Banco Santander loan due September 2021
Debt Instrument [Line Items]
Long-term debt, gross	19.2	0.0
Financiadora de Estudos e Projetos Loan due November 2023
Debt Instrument [Line Items]
Long-term debt, gross	7.4	9.3
Other
Debt Instrument [Line Items]
Long-term debt, gross	0.0	1.7
Revolving Credit Facility due July 2021 | Revolving Credit Facility due July 2021
Debt Instrument [Line Items]
Long-term debt, gross	250.4	197.0
Secured Debt | Term Loans due July 2021
Debt Instrument [Line Items]
Long-term debt, gross	822.5	828.9
Senior Notes | 4.875% Senior Notes due July 2024
Debt Instrument [Line Items]
Long-term debt, gross	$ 250.0	$ 250.0
Interest rate stated percentage	4.875%	4.875%

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Inventories (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Finished goods	$ 271.0	$ 202.2
Raw materials and supplies	66.1	64.4
Total inventories	$ 337.1	$ 266.6

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Label	Element	Value
Accounting Standards Update 2016-02 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (100,000)
Accounting Standards Update 2016-02 [Member] | Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (100,000)

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Earnings per Share

9 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

Earnings per Share

Earnings per Share:

The Company calculates earnings per share using the two-class method. The two-class method requires allocating the Company’s net earnings to both common shares and participating securities. The following table sets forth the computation of basic and diluted earnings per common share (in millions, except for share and per-share data):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2019			2018			2019			2018
Numerator:
Net earnings	$	10.6		$	12.8		$	6.4		$	17.8
Less: net earnings allocated to participating securities(a)	(0.2		)	(0.1		)	(0.7		)	(0.3		)
Net earnings available to common shareholders	$	10.4		$	12.7		$	5.7		$	17.5
Denominator (in thousands):
Weighted-average common shares outstanding, shares for basic earnings per share	33,884			33,851			33,880			33,846
Weighted-average awards outstanding(b)	—			—			—			—
Shares for diluted earnings per share	33,884			33,851			33,880			33,846
Net earnings per common share, basic	$	0.31		$	0.37		$	0.17		$	0.52
Net earnings per common share, diluted	$	0.31		$	0.37		$	0.17		$	0.51

(a) Weighted participating securities include RSUs and PSUs that receive non-forfeitable dividends and consist of 321,000 and 291,000 weighted participating securities for the three and nine months ended September 30, 2019, respectively, and 193,000 and 183,000 weighted participating securities for the three and nine months ended September 30, 2018, respectively.

(b)

For the calculation of diluted net earnings per share, the Company uses the more dilutive of either the treasury stock method or the two-class method to determine the weighted-average number of outstanding common shares. In addition, the Company had 1,194,000 and 1,049,000 weighted-average equity awards outstanding for the three and nine months ended September 30, 2019 and 871,000 and 802,000 weighted-average equity awards outstanding for the three and nine months ended September 30, 2018, respectively.

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Property, Plant and Equipment, Net (Tables)

9 Months Ended

Sep. 30, 2019

Property, Plant and Equipment [Abstract]

Summary of Property, Plant and Equipment, Net

Property, plant and equipment, net, consists of the following (in millions):

	September 30, 2019			December 31, 2018
Land, buildings and structures, and leasehold improvements	$	585.2		$	580.7
Machinery and equipment	972.2			983.2
Office furniture and equipment	57.7			54.4
Mineral interests	169.1			168.1
Construction in progress	143.7			118.3
	1,927.9			1,904.7
Less accumulated depreciation and depletion	(904.4		)	(852.7		)
Property, plant and equipment, net	$	1,023.5		$	1,052.0

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Long-Term Debt - Narrative (Details)	3 Months Ended
	Sep. 30, 2019 USD ($)	Mar. 31, 2019 USD ($) loan
Debt Instrument [Line Items]
Value of receivables sold	$ 8,400,000
Cash received from receivables sold	$ 7,900,000
Receivables balance for which company is contingently liable	0.200
Brazilian Reais-denominated Loans
Debt Instrument [Line Items]
Number of debt instruments | loan		2
Face amount	$ 36,000,000.0	$ 18,000,000.0
Brazilian Reais-denominated Loan Matured In July 2019 | Certificado de Deposito Interbancario (CDI)
Debt Instrument [Line Items]
Variable rate, percentage of reference rate		123.00%
Brazilian Reais-denominated Loan Matured In September 2019 | Certificado de Deposito Interbancario (CDI)
Debt Instrument [Line Items]
Variable rate, percentage of reference rate		128.00%
Brazilian Reais-denominated Loans Mature In July 2021 | Certificado de Deposito Interbancario (CDI)
Debt Instrument [Line Items]
Variable rate, percentage of reference rate	120.00%
Brazilian Reais-denominated Loans Mature In September 2021 | Certificado de Deposito Interbancario (CDI)
Debt Instrument [Line Items]
Variable rate, percentage of reference rate	141.00%

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Property, Plant and Equipment, Net (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 1,927.9	$ 1,904.7
Less accumulated depreciation and depletion	(904.4)	(852.7)
Property, plant and equipment, net	1,023.5	1,052.0
Land, buildings and structures, and leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	585.2	580.7
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	972.2	983.2
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	57.7	54.4
Mineral interests
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	169.1	168.1
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 143.7	$ 118.3

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Fair Value Measurements

9 Months Ended

Sep. 30, 2019

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements:

The Company’s financial instruments are measured and reported at their estimated fair values. Fair value is the price that would be received upon the sale of an asset or paid to transfer a liability in an orderly transaction. When available, the Company uses quoted prices in active markets to determine the fair values for its financial instruments (Level 1 inputs) or, absent quoted market prices, observable market-corroborated inputs over the term of the financial instruments (Level 2 inputs). The Company does not have any unobservable inputs that are not corroborated by market inputs (Level 3 inputs).

The Company holds marketable securities associated with its defined contribution and pre-tax savings plans, which are valued based on readily available quoted market prices. The Company utilizes derivative instruments to manage its risk of changes in natural gas prices and its risk of changes in foreign currency exchange rates (see Note 12). The fair values of the natural gas and foreign currency derivative instruments are determined using market data of forward prices for all of the Company’s contracts. 

The estimated fair values for each type of instrument are presented below (in millions):

	September 30, 2019			Level One			Level Two			Level Three
Asset Class:
Mutual fund investments in a non-qualified savings plan(a)	$	1.4		$	1.4		$	—		$	—
Derivatives – foreign currency contracts, net	3.2			—			3.2			—
Total Assets	$	4.6		$	1.4		$	3.2		$	—
Liability Class:
Liabilities related to non-qualified savings plan	$	(1.4	)	$	(1.4	)	$	—		$	—
Derivatives – natural gas instruments, net	(0.9		)	—			(0.9		)	—
Total Liabilities	$	(2.3	)	$	(1.4	)	$	(0.9	)	$	—

(a) Includes mutual fund investments of approximately 30% in common stock of large-cap U.S. companies, 15% in common stock of small to mid-cap U.S. companies, 5% in international companies, 10% in bond funds, 20% in short-term investments and 20% in blended funds.

	December 31, 2018			Level One			Level Two			Level Three
Asset Class:
Mutual fund investments in a non-qualified savings plan(a)	$	1.8		$	1.8		$	—		$	—
Derivatives – foreign currency contracts, net	4.5			—			4.5			—
Total Assets	$	6.3		$	1.8		$	4.5		$	—
Liability Class:
Liabilities related to non-qualified savings plan	$	(1.8	)	$	(1.8	)	$	—		$	—
Derivatives – natural gas instruments, net	(0.6		)	—			(0.6		)	—
Total Liabilities	$	(2.4	)	$	(1.8	)	$	(0.6	)	$	—

(a) Includes mutual fund investments of approximately 25% in the common stock of large-cap U.S. companies, 15% in the common stock of small to mid-cap U.S. companies, 5% in the common stock of international companies, 20% in bond funds, 15% in short-term investments and 20% in blended funds.

Cash and cash equivalents, accounts receivable (net of allowance for bad debts) and payables are carried at cost, which approximates fair value due to their liquid and short-term nature. The Company’s investments related to its nonqualified savings plan of $1.4 million and $1.8 million at September 30, 2019 and December 31, 2018, respectively, are stated at fair value based on quoted market prices. As of September 30, 2019 and December 31, 2018, the estimated amount a third party would pay for the Company’s fixed-rate 4.875% Senior Notes due July 2024, based on available trading information (Level 2), totaled $246.3 million and $226.3 million, respectively, compared with the aggregate principal amount at maturity of $250.0 million. The estimated amount a third party would pay at September 30, 2019 and December 31, 2018 for the amounts outstanding under the Company’s term loans and revolving credit facility, based upon available bid information received from the Company’s lender (Level 2), totaled $1.06 billion and $1.02 billion, respectively, compared with the aggregate principal balance of $1.07 billion and $1.03 billion, respectively. The Brazilian loans have floating rates and their fair value approximates their carrying value.

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Inventories (Tables)

9 Months Ended

Sep. 30, 2019

Inventory Disclosure [Abstract]

Summary of Inventories

Inventories consist of the following (in millions):

	September 30, 2019		December 31, 2018
Finished goods	$	271.0	$	202.2
Raw materials and supplies	66.1		64.4
Total inventories	$	337.1	$	266.6

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Accounting Policies and Basis of Presentation

9 Months Ended

Sep. 30, 2019

Accounting Policies [Abstract]

Accounting Policies and Basis of Presentation

Accounting Policies and Basis of Presentation:

Compass Minerals International, Inc. (“CMI”), through its subsidiaries (collectively, the “Company”), is a leading producer of essential minerals that solve nature’s challenges, including salt for winter roadway safety and other consumer, industrial and agricultural uses, specialty plant nutrition minerals that improve the quality and yield of crops, and specialty chemicals for water treatment and other industrial processes. The Company’s principal products are salt, consisting of sodium chloride and magnesium chloride; plant nutrients, consisting of sulfate of potash (“SOP”), secondary nutrients and micronutrients; and specialty chemicals. The Company also provides records management services to businesses located in the United Kingdom (the “U.K.”). The Company’s production sites are located in the United States (“U.S.”), Canada, Brazil and the U.K. Except where otherwise noted, references to North America include only the continental U.S. and Canada, and references to the U.K. include only England, Scotland and Wales. References to “Compass Minerals,” “our,” “us” and “we” refer to CMI and its consolidated subsidiaries.

CMI is a holding company with no significant operations other than those of its wholly-owned subsidiaries. The consolidated financial statements include the accounts of CMI and its wholly-owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation.

The Company uses the equity method of accounting for equity securities when it has significant influence or when it has more than a minor ownership interest or more than minor influence over an investee’s operations but does not have a controlling financial interest. Initial investments are recorded at cost (including certain transaction costs) and are adjusted by the Company’s share of the investees’ undistributed earnings and losses.

The accompanying unaudited consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. These unaudited consolidated financial statements should be read in conjunction with the consolidated financial statements of the Company for the year ended December 31, 2018, as filed with the Securities and Exchange Commission in its Annual Report on Form 10-K. In the opinion of management, all adjustments, consisting of normal recurring adjustments considered necessary for a fair presentation, have been included.

The Company experiences a substantial amount of seasonality in its sales with respect to its deicing salt products. As a result, sales and operating earnings are generally higher in the first and fourth quarters and lower during the second and third quarters of each year. In particular, sales of highway and consumer deicing salt and magnesium chloride products vary based on the severity of the winter conditions in areas where the products are used. Following industry practice in North America and the U.K., the Company seeks to stockpile sufficient quantities of deicing salt throughout the second, third and fourth quarters to meet the estimated requirements for the upcoming winter season. Production of deicing salt can also vary based on the severity or mildness of the preceding winter season. Due to the seasonal nature of the deicing product lines, operating results for the interim periods are not necessarily indicative of the results that may be expected for the full year.

The Company’s plant nutrition business is also seasonal. For example, the strongest demand for the Company’s plant nutrition products in Brazil typically occurs during the spring planting season. As a result, the Company and its customers generally build inventories during the low demand periods of the year to ensure timely product availability during the peak sales season. The seasonality of this demand results in the Company’s sales volumes and operating income for the Plant Nutrition South America segment usually being the highest during the third and fourth quarters of each year (as the spring planting season begins in September in Brazil).

Significant Accounting Policies

The Company’s significant accounting policies are detailed in “Note 2 – Summary of Significant Accounting Policies” within Item 8 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2018. Significant changes to these accounting policies as a result of adopting Accounting Standards Update (ASU) 2016-02, Leases (Topic 842), can be found in “Note 3 – Leases.”

Recent Accounting Pronouncements

In August 2018, the Financial Accounting Standards Board (the “FASB”) issued guidance to require customers in a cloud computing arrangement that is a service contract to follow the internal use software guidance to determine which implementation costs to capitalize as assets. The capitalized implementation costs related to these arrangements are required to be amortized over the term of the hosting arrangement. The guidance also clarifies the presentation requirements for these costs in an entity’s financial statements. The guidance is effective for periods beginning after December 15, 2019, and interim periods within those fiscal years. The Company does not expect this guidance to have a material impact on its consolidated financial statements.

In January 2017, the FASB issued guidance to simplify the accounting for goodwill impairment. The guidance removes Step 2 of the goodwill impairment test, which requires a hypothetical purchase price allocation. A goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. All other goodwill impairment guidance remains largely unchanged. The guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for annual and interim goodwill impairment testing dates after January 1, 2017. The Company is currently assessing the impact this guidance will have on its consolidated financial statements.

In June 2016, the FASB issued guidance for estimating credit losses on certain types of financial instruments, including trade receivables, by introducing an approach based on expected losses. The expected loss approach will require entities to incorporate considerations of historical information, current information and reasonable and supportable forecasts. The guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, requires a modified retrospective transition method and early adoption is permitted. The Company is currently assessing the impact this guidance will have on its consolidated financial statements.

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Property, Plant and Equipment, Net

9 Months Ended

Sep. 30, 2019

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment, Net

Property, Plant and Equipment, Net:

Property, plant and equipment, net, consists of the following (in millions):

	September 30, 2019			December 31, 2018
Land, buildings and structures, and leasehold improvements	$	585.2		$	580.7
Machinery and equipment	972.2			983.2
Office furniture and equipment	57.7			54.4
Mineral interests	169.1			168.1
Construction in progress	143.7			118.3
	1,927.9			1,904.7
Less accumulated depreciation and depletion	(904.4		)	(852.7		)
Property, plant and equipment, net	$	1,023.5		$	1,052.0

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2019

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies:

The Wisconsin Department of Agriculture, Trade and Consumer Protection (“DATCP”) and the Wisconsin Department of Natural Resources (“DNR”) have information indicating that agricultural chemicals are present within the subsurface area of the Company’s property located in Kenosha, Wisconsin. The agricultural chemicals were used by previous owners and operators of the site. None of the identified chemicals have been used in association with the Company’s operations since it acquired the property in 2002. DATCP and DNR have directed the Company to conduct further investigations into the environmental conditions at the Kenosha plant. The Company continues on-property investigations and has provided the findings to DATCP and DNR as they have become available. All investigations and mitigation activities to date, and any potential future remediation work, are being conducted under the Wisconsin Agricultural Chemical Cleanup Program, which provides for reimbursement of some of the costs.

The Company conducts business operations in several countries and is subject to various federal and local labor, social security, environmental and tax laws. While the Company believes it complies with such laws, they are complex and subject to interpretation. In addition to the tax assessments discussed in Note 7, the Company’s Brazilian subsidiaries are party to administrative tax proceedings and claims which totaled $15.2 million and $15.9 million as of September 30, 2019 and December 31, 2018, respectively, and relate primarily to value added tax, state tax (ICMS) and social security tax (PIS and COFINS) assessments. The

Company has assessed the likelihood of a loss at less than probable and therefore, has not established a reserve for these matters. The Company also assumed liabilities for labor-related matters in connection with the 2016 acquisition of Produquímica Indústria e Comércio S.A. (which is now known as Compass Minerals América do Sul Indústria e Comércio S.A.), which are primarily related to compensation, labor benefits and consequential tax claims that totaled $6.0 million and $7.8 million as of September 30, 2019 and December 31, 2018, respectively. The Company believes the maximum exposure for these other labor matters totaled approximately $25 million and $31 million as of September 30, 2019 and December 31, 2018, respectively.

The Division of Enforcement of the U.S. Securities and Exchange Commission is investigating the Company’s disclosures concerning the operation of the Goderich mine. The Company has cooperated with this investigation and will continue to do so. While it is not possible to predict the timing or the outcome of the SEC inquiry, the Company believes that this matter will not have a material impact on its results of operation, cash flows or financial position.

The Company is also involved in legal and administrative proceedings and claims of various types from the ordinary course of the Company’s business.

Management cannot predict the outcome of legal claims and proceedings with certainty. Nevertheless, management believes the outcome of legal proceedings and claims, which are pending or known to be threatened, even if determined adversely, will not, individually or in the aggregate, have a material adverse effect on the Company’s results of operations, cash flows or financial position.

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Leases - Operating and Finance Leases by Balance Sheets Location (Details) $ in Millions	Sep. 30, 2019 USD ($)
Assets
Operating lease assets	$ 39.9
Finance lease assets	5.8
Total leased assets	45.7
Current liabilities:
Current operating lease liabilities	13.4
Current finance lease liabilities	1.2
Noncurrent liabilities:
Other noncurrent operating lease liabilities	26.7
Other noncurrent finance lease liabilities	6.2
Total lease liabilities	$ 47.5

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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Sales	$ 341.3	$ 322.5	$ 990.2	$ 1,007.1
Gross profit	76.4	71.4	194.8	179.3
Selling, general and administrative expenses	46.3	38.8	127.4	117.3
Operating earnings	30.1	32.6	67.4	62.0
Other expense (income):
Interest expense	17.7	15.9	50.7	44.5
Net earnings in equity investee	(0.4)	(0.6)	(0.4)	(0.9)
Other, net	(2.6)	2.8	5.4	(0.4)
Earnings before income taxes	15.4	14.5	11.7	18.8
Income tax expense	4.8	1.7	5.3	1.0
Net earnings	$ 10.6	$ 12.8	$ 6.4	$ 17.8
Basic net earnings per common share (in dollars per share)	$ 0.31	$ 0.37	$ 0.17	$ 0.52
Diluted net earnings per common share (in dollars per share)	$ 0.31	$ 0.37	$ 0.17	$ 0.51
Weighted-average common shares outstanding (in thousands):
Basic (in shares)	33,884	33,851	33,880	33,846
Diluted (in shares)	33,884	33,851	33,880	33,846
Shipping and handling cost
Cost	$ 54.4	$ 51.9	$ 215.3	$ 221.8
Product cost
Cost	$ 210.5	$ 199.2	$ 580.1	$ 606.0

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2019

Fair Value Disclosures [Abstract]

Summary of Estimated Fair Value of Assets and Liabilities

The estimated fair values for each type of instrument are presented below (in millions):

	September 30, 2019			Level One			Level Two			Level Three
Asset Class:
Mutual fund investments in a non-qualified savings plan(a)	$	1.4		$	1.4		$	—		$	—
Derivatives – foreign currency contracts, net	3.2			—			3.2			—
Total Assets	$	4.6		$	1.4		$	3.2		$	—
Liability Class:
Liabilities related to non-qualified savings plan	$	(1.4	)	$	(1.4	)	$	—		$	—
Derivatives – natural gas instruments, net	(0.9		)	—			(0.9		)	—
Total Liabilities	$	(2.3	)	$	(1.4	)	$	(0.9	)	$	—

(a) Includes mutual fund investments of approximately 30% in common stock of large-cap U.S. companies, 15% in common stock of small to mid-cap U.S. companies, 5% in international companies, 10% in bond funds, 20% in short-term investments and 20% in blended funds.

	December 31, 2018			Level One			Level Two			Level Three
Asset Class:
Mutual fund investments in a non-qualified savings plan(a)	$	1.8		$	1.8		$	—		$	—
Derivatives – foreign currency contracts, net	4.5			—			4.5			—
Total Assets	$	6.3		$	1.8		$	4.5		$	—
Liability Class:
Liabilities related to non-qualified savings plan	$	(1.8	)	$	(1.8	)	$	—		$	—
Derivatives – natural gas instruments, net	(0.6		)	—			(0.6		)	—
Total Liabilities	$	(2.4	)	$	(1.8	)	$	(0.6	)	$	—

(a)

Includes mutual fund investments of approximately 25% in the common stock of large-cap U.S. companies, 15% in the common stock of small to mid-cap U.S. companies, 5% in the common stock of international companies, 20% in bond funds, 15% in short-term investments and 20% in blended funds.

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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018
Statement of Stockholders' Equity [Abstract]
Cash dividends per share (in dollars per share)	$ 0.72	$ 0.72	$ 0.72	$ 0.72	$ 0.72	$ 0.72

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Stockholders' Equity and Equity Instruments - Stock-Based Compensation Activity (Details)	9 Months Ended
	Sep. 30, 2019 $ / shares shares
Stock Options
Number
Outstanding at beginning of period (in shares)	708,746
Granted (in shares)	369,716
Cancelled/expired (in shares)	(139,479)
Outstanding at end of period (in shares)	938,983
Weighted-average exercise price
Weighted-average exercise price at beginning of period (in dollars per share) | $ / shares	$ 70.76
Weighted-average exercise price, granted (in dollars per share) | $ / shares	54.15
Weighted-average exercise price, cancelled/expired (in dollars per share) | $ / shares	69.48
Weighted-average exercise price at end of period (in dollars per share) | $ / shares	$ 64.41
RSUs
Number
Outstanding at beginning of period (in shares)	83,308
Granted (in shares)	210,670
Released from restriction (in shares)	(32,630)
Cancelled/expired (in shares)	(49,054)
Outstanding at end of period (in shares)	212,294
Weighted-average fair value
Weighted-average fair value at beginning of period (in dollars per share) | $ / shares	$ 65.75
Weighted-average fair value, granted (in dollars per share) | $ / shares	49.54
Weighted-average fair value, released from restriction (in dollars per share) | $ / shares	66.95
Weighted-average fair value, cancelled/expired (in dollars per share) | $ / shares	54.72
Weighted-average fair value at end of period (in dollars per share) | $ / shares	$ 52.02
PSUs
Number
Outstanding at beginning of period (in shares)	126,638
Granted (in shares)	123,003
Cancelled/expired (in shares)	(67,134)
Outstanding at end of period (in shares)	182,507
Weighted-average fair value
Weighted-average fair value at beginning of period (in dollars per share) | $ / shares	$ 69.06
Weighted-average fair value, granted (in dollars per share) | $ / shares	56.88
Weighted-average fair value, cancelled/expired (in dollars per share) | $ / shares	67.39
Weighted-average fair value at end of period (in dollars per share) | $ / shares	$ 61.46
PSU at grant date (in shares per unit)	1

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Derivative Financial Instruments - Fair Value of Hedged Items (Details) $ in Millions	Sep. 30, 2019 USD ($) counterparty	Dec. 31, 2018 USD ($) counterparty
Commodity contracts
Derivatives, Fair Value [Line Items]
Number of counterparties | counterparty	2	2
Netting of contracts in a receivable position against contracts in payable position		$ 0.1
Swap contracts
Derivatives, Fair Value [Line Items]
Number of counterparties | counterparty	1	2
Derivatives Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 3.4	$ 4.5
Liability Derivatives	1.1	0.6
Derivatives Designated as Hedging Instruments | Commodity contracts | Other current assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	0.1	0.0
Derivatives Designated as Hedging Instruments | Commodity contracts | Accrued expenses and other current liabilities
Derivatives, Fair Value [Line Items]
Liability Derivatives	0.7	0.6
Derivatives Designated as Hedging Instruments | Commodity contracts | Other assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	0.1
Derivatives Designated as Hedging Instruments | Commodity contracts | Other noncurrent liabilities
Derivatives, Fair Value [Line Items]
Liability Derivatives	0.4
Derivatives Designated as Hedging Instruments | Swap contracts | Other current assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	3.2	2.2
Derivatives Designated as Hedging Instruments | Swap contracts | Accrued expenses and other current liabilities
Derivatives, Fair Value [Line Items]
Liability Derivatives	$ 0.0	0.0
Derivatives Designated as Hedging Instruments | Swap contracts | Other assets
Derivatives, Fair Value [Line Items]
Asset Derivatives		2.3
Derivatives Designated as Hedging Instruments | Swap contracts | Other noncurrent liabilities
Derivatives, Fair Value [Line Items]
Liability Derivatives		$ 0.0