10-K

United States

Securities and Exchange Commission

Washington, D.C. 20549

FORM 10-K

(MARK ONE)

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

For the fiscal year ended December 31, 2020

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 No.)

9900 West 109th Street, Suite 100		66210
Overland Park,	Kansas	(Zip Code)
(Address of principal executive offices)

Registrant’s telephone number, including area code:

(913) 344-9200

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

Securities registered pursuant to Section 12(g) of the Act:  None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes þ No ☐

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.     Yes ☐ No þ

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	þ	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 such files).
	Yes	þ	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	þ	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 has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☑

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

As of June 30, 2020, the aggregate market value of the registrant’s common stock held by non-affiliates of the registrant was $1,653,658,110, based on the closing sale price of $48.75 per share, as reported on the New York Stock Exchange.

The number of shares outstanding of the registrant’s $0.01 par value common stock at February 23, 2021 was 33,974,215 shares.

DOCUMENTS INCORPORATED BY REFERENCE

Document	Parts into which Incorporated
Portions of the Proxy Statement for the Annual Meeting of Stockholders to be held May 18, 2021	Part III, Items 10, 11, 12, 13 and 14

COMPASS MINERALS INTERNATIONAL, INC.

TABLE OF CONTENTS

PART I		Page No.
Item 1.	Business	4
Item 1A.	Risk Factors	22
Item 1B.	Unresolved Staff Comments	35
Item 2.	Properties	35
Item 3.	Legal Proceedings	35
Item 4.	Mine Safety Disclosures	35
PART II
Item 5.	Market for the Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	37
Item 6.	Selected Financial Data	38
Item 7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	39
Item 7A.	Quantitative and Qualitative Disclosures About Market Risk	52
Item 8.	Financial Statements and Supplementary Data	54
Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	95
Item 9A.	Controls and Procedures	95
Item 9B.	Other Information	96
PART III
Item 10.	Directors, Executive Officers and Corporate Governance	96
Item 11.	Executive Compensation	96
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	96
Item 13.	Certain Relationships and Related Transactions, and Director Independence	96
Item 14.	Principal Accounting Fees and Services	96
PART IV
Item 15.	Exhibits, Financial Statement Schedules	97
Item 16.	Form 10-K Summary	102
SIGNATURES		103

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PART I

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

Certain statements in this annual report on Form 10-K (this “report”), including without limitation our or management’s beliefs, expectations or opinions; statements regarding future events or future financial performance; our plans, objectives and strategies; the impact of the COVID-19 pandemic on us; our outlook, including expected sales volumes and the timing and the outcome of the strategic evaluation and potential sale of our South America businesses; existing or potential capital expenditures, capital projects and investments; the industry and our competition; projected sources of cash flow; potential legal liability; proposed legislation and regulatory action; the seasonal distribution of working capital requirements; our reinvestment of foreign earnings outside the United States (“U.S.”); repatriation of foreign earnings to the U.S.; our ability to optimize cash accessibility and minimize tax expense; the impact of the U.S. Tax Cuts and Jobs Act; our debt service requirements; our liquidity needs; outcomes of matters with taxing authorities; and the seasonality of our business, are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements are those that predict or describe future events or trends and that do not relate solely to historical matters. We use words such as “may,” “would,” “could,” “should,” “will,” “likely,” “expect,” “anticipate,” “believe,” “intend,” “plan,” “forecast,” “outlook,” “project,” “estimate” and similar expressions suggesting future outcomes or events to identify forward-looking statements or forward-looking information. These statements are based on our current expectations and involve risks and uncertainties that could cause our actual results to differ materially. In evaluating these statements, you should carefully consider various risks, uncertainties and factors including, but not limited to, those listed under “Risk Factors” and elsewhere in this report. Forward-looking statements are only predictions and are subject to certain risks and uncertainties that may cause our actual results to differ materially from the forward-looking statements expressed or implied in this report as a result of factors, risks, and uncertainties, over many of which we do not have control.

Although we believe that the expectations reflected in the forward-looking statements are reasonable as of the date of this report, we cannot guarantee future results, levels of activity, performance or achievements. We do not undertake, and hereby disclaim any obligation or duty, unless otherwise required to do so by applicable securities laws, to update any forward-looking statement after the date of this report regardless of any new information, future events or other factors. The inclusion of any statement in this report does not constitute our admission that the events or circumstances described in such statement are material to us.

Factors that could cause actual results, levels of activity, performance, or achievements 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 inability 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;

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•our payment of any dividends;

•the impact of competition on the sales of our products;

•risks associated with our international operations and sales, including changes in currency exchange rates and inflation risks;

•the impact of anticipated changes in plant nutrition product prices and customer application rates;

•conditions in the sectors where we sell products and supply and demand imbalances for competing 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 U.S. laws and regulations related to import and export requirements and anti-corruption laws;

•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;

•disruptions caused by the COVID-19 pandemic, or other outbreaks of infectious disease or similar public health threats;

•our ability to successfully implement our strategies and the timing and outcome of the strategic evaluation and sale processes for our South America businesses;

•the loss of key personnel;

•a compromise of 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 and related laws and regulations;

•domestic and international general business and economic conditions; and

•other risk factors included in this report or reported from time to time in our filings with the Securities and Exchange Commission (the “SEC”). See “Where You Can Find More Information.”

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MARKET AND INDUSTRY DATA AND FORECASTS

This report includes market share and industry data and forecasts that we obtained from publicly available information and industry publications, surveys, market research, internal company surveys and consultant surveys. Industry publications and surveys, consultant surveys and forecasts generally state that the information contained therein has been obtained from sources believed to be reliable, but there can be no assurance as to the accuracy and completeness of such information. We have not independently verified any of the data from third-party sources nor have we ascertained the underlying economic assumptions relied upon therein. Similarly, internal company surveys, industry forecasts and market research, which we believe to be reliable based upon management’s knowledge of the industry, have not been verified by any independent sources. Except where otherwise noted, references to North America include only the continental U.S. and Canada, references to the United Kingdom (“U.K.”) include only England, Scotland and Wales, and statements as to our position relative to our competitors or as to market share refer to the most recent available data. Statements concerning (a) North American consumer and industrial salt and highway deicing salt markets are generally based on historical sales volumes, (b) U.K. highway deicing salt sales are generally based on historical sales volumes, and (c) sulfate of potash are generally based on historical sales volumes. 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.

WHERE YOU CAN FIND MORE INFORMATION

We file annual, quarterly and current reports and other information with the SEC and our SEC filings are available at the SEC’s website at www.sec.gov. Copies of these documents are also available on our website, www.compassminerals.com. The information on these websites is not part of this report and is not incorporated by reference into this report. Further, our references to website URLs are intended to be inactive textual references only.

You may also request a copy of any of our filings, at no cost, by writing or telephoning:

Investor Relations

Compass Minerals International, Inc.

9900 West 109th Street, Suite 100

Overland Park, Kansas 66210

For general inquiries concerning us, please call (913) 344-9200.

Unless the context requires otherwise, references in this annual report to the “Company,” “Compass Minerals,” “CMP,” “we,” “us” and “our” refer to Compass Minerals International, Inc. (“CMI,” the parent holding company) and its consolidated subsidiaries collectively.

ITEM 1.    BUSINESS

COMPANY OVERVIEW

Compass Minerals is a leading provider of essential minerals focused on safely delivering where and when it matters to help solve nature’s challenges for customers and communities. Our salt products help keep roadways safe during winter weather and are used in numerous other consumer, industrial and agricultural applications. Our plant nutrition business manufactures an innovative and diverse portfolio of products that improve the quality and yield of crops, while supporting sustainable agriculture. Additionally, our specialty chemical business serves the water treatment industry and other industrial processes. As of December 31, 2020, we operate 21 production and packaging facilities with more than 3,000 personnel throughout the U.S., Canada, Brazil and the U.K, including:

•The largest underground 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 near Ogden, Utah, which is both the largest sulfate of potash specialty fertilizer (“SOP”) production site and the largest solar salt production site in the Western Hemisphere;

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

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

Our Salt segment 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

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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 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 premium specialty plant nutrient products under our Wolf Trax and other brands.

In October 2016, we significantly expanded our plant nutrition business with the acquisition of Compass Minerals América do Sul Indústria e Comércio Ltda. (“Compass Minerals South America”), which constitutes our Plant Nutrition South America segment. The 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.

We sell our salt and plant nutrition products primarily in the U.S., Canada, Brazil, the U.K. and the European Union (“EU”). See Part II, Item 8, Note 15 to our Consolidated Financial Statements for financial information relating to our operations by geographic areas.

SALT SEGMENT

Overview

Salt is indispensable and enormously versatile with thousands of reported uses. In addition, there are no known cost-effective alternatives for most high-volume uses. Through the use of effective mining techniques and efficient production processes, we leverage our high-grade salt deposits, which are among the most extensive in the world. Further, many of our Salt segment assets are in locations that are logistically favorable to our core markets. Our strategy for this segment is to focus on driving profitability from every ton we produce through cost efficiency as well as commercial and operational execution.

Through our Salt segment, we produce, market and sell salt (sodium chloride) and magnesium chloride in North America and sodium chloride in the U.K. Our Salt products include rock salt, mechanically-evaporated salt, solar-evaporated salt, brine magnesium chloride and flake magnesium chloride. While we also purchase potassium chloride (“KCl”) and calcium chloride to sell as finished products or to blend with sodium chloride to produce specialty products, sodium chloride represents the vast majority of the products we produce, market and sell. In 2020, the Salt segment accounted for approximately 57% of our sales (see Part II, Item 8, Note 15 to our Consolidated Financial Statements for segment financial information).

Our Salt products are used in a wide variety of applications, including as a deicer for roadways, consumer and professional use, as an ingredient in chemical production, for water treatment, human and animal nutrition and for a variety of other consumer and industrial uses.

Historical demand for salt has remained relatively stable during periods of rising prices and through a variety of economic cycles due to its relatively low cost and diverse number of end uses. As a result, our cash flows from our Salt segment are not materially impacted by economic cycles. However, demand for deicing salt products is primarily affected by the number and intensity of snow events and temperatures in our service territories.

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Salt Industry Overview

In our primary markets, we estimate that the consumption of highway deicing rock salt in North America, including rock salt used in chemical manufacturing processes, is approximately 39 million tons per year, assuming average winter weather conditions, while the consumer and industrial market is approximately 10 million tons per year. In the U.K., we estimate that the consumption of highway deicing salt is approximately 2 million tons per year, assuming average winter weather conditions. We also estimate that salt production in the U.S. has increased at a historical average rate of approximately 1% per year, although there have been recent fluctuations above and below this average driven primarily by winter weather variability.

Salt prices vary according to purity, end use and variations in refining and packaging processes. Management estimates that salt prices in the U.S. have increased at a historical average rate of approximately 3% - 4% per year, although there have been recent fluctuations above and below this average. Due to salt’s relatively low production cost, transportation and handling costs tend to be a significant component of the total delivered cost, which makes logistics management and customer service key competitive factors in the industry. The high relative cost associated with transportation of salt tends to favor producers located nearest to customers.

Processing Methods

As of December 31, 2020, salt mining, other production activities and packaging are conducted at 11 of our facilities. The three processing methods we use to produce salt are described below.

Underground Rock Salt Mining - We produce most of the salt we sell through underground mining. In North America, we use a combination of continuous mining and drill and blast techniques. At our Winsford, U.K. mine, we utilize continuous mining techniques. We introduced continuous mining at our Goderich, Ontario mine in 2012 and shifted all of our Goderich mine production to this technology at the end of 2017. Mining machinery moves salt from the salt face to conveyor belts, which transport the salt to the mill center where it is crushed and screened. It is then hoisted to the surface where the processed salt is loaded onto shipping vessels, railcars or trucks. The primary power sources for each of our rock salt mines are electricity and diesel fuel. Rock salt is sold in our highway deicing product lines and for numerous applications in our consumer and industrial product lines.

Mechanical Evaporation - Mechanical evaporation involves creating salt-saturated brine from brine wells in underground salt deposits and subjecting this salt-saturated brine to vacuum pressure and heat to precipitate and crystallize salt. The primary power sources used for this process are natural gas and electricity. The resulting product has a high purity and uniform physical shape. Mechanically evaporated salt is primarily sold through our consumer and industrial salt product lines.

Solar Evaporation - Solar evaporation is used in areas of the world where high-salinity brine is available and weather conditions provide for a high natural evaporation rate. Salt-saturated brine is pumped into a series of large open ponds where sun and wind evaporate the water and crystallize the salt, which is then mechanically harvested and processed through washing, drying and screening. We produce solar salt at the Great Salt Lake near Ogden, Utah and sell it through both our consumer and industrial and our highway deicing product lines. We also produce magnesium chloride using solar evaporation. After sodium chloride and potassium-rich salts precipitate from brine, a concentrated magnesium chloride brine solution remains, which becomes the raw material we use to produce several magnesium chloride products. We primarily sell these products in our Salt segment through our consumer and industrial and highway deicing product lines.

Operations and Facilities

Canada - We produce finished Salt products at four locations in Canada. Rock salt mined at our Goderich mine serves highway deicing markets and consumer and industrial markets in Canada and the Great Lakes region of the U.S., principally through a series of depots located around the Great Lakes and through our packaging facilities. Mechanically evaporated salt used for our consumer and industrial product lines is produced at three of our facilities strategically located throughout Canada: Amherst, Nova Scotia in Eastern Canada; Goderich, Ontario in Central Canada; and Unity, Saskatchewan in Western Canada.

United States - We produce finished Salt products at three locations in the U.S. Our Cote Blanche, Louisiana rock salt mine primarily serves highway deicing customers through a series of depots located along the Mississippi and Ohio rivers (and their major tributaries) and chemical and agricultural customers in the Southern and Midwestern U.S. Our solar evaporation facility located near Ogden, Utah principally serves the Midwestern and Western U.S. consumer and industrial markets, provides salt for highway deicing and chemical applications and produces magnesium chloride, which is used in deicing, dust control and unpaved road surface stabilization applications. The production capacity for solar-evaporated salt at our Ogden facility is currently only limited by demand. Mechanically evaporated salt for our U.S. consumer and industrial customers is produced at our Lyons, Kansas plant. We also operate three salt packaging facilities located in Illinois, Minnesota and New York.

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United Kingdom - Our Winsford rock salt mine in Northwest England, near Manchester, serves the U.K. highway deicing market, primarily in England and Wales.

Our current estimated production capacity is approximately 16.2 million tons of salt per year. The following table shows the estimated annual production capacity and type of salt produced at each of our owned or leased production locations as of December 31, 2020:

Location	Annual Production Capacity(a) (tons)	Product Type
North America
Goderich, Ontario Mine	8.0 million	Rock Salt
Cote Blanche, Louisiana Mine	2.9 million	Rock Salt
Ogden, Utah Plant:
Salt(b)	1.5 million	Solar Salt
Magnesium Chloride(c)	750,000	Magnesium Chloride
Lyons, Kansas Plant	450,000	Evaporated Salt
Unity, Saskatchewan Plant	140,000	Evaporated Salt
Goderich, Ontario Plant	140,000	Evaporated Salt
Amherst, Nova Scotia Plant	130,000	Evaporated Salt
United Kingdom
Winsford, Cheshire Mine	2.2 million	Rock Salt

(a)Annual production capacity is our estimate of the tons that could be produced based on design capacity, assuming optimization of our operations, including our facilities, equipment and workforce. Incremental equipment, labor or other costs may be required to achieve these production capacity estimates. As we continue our efforts to optimize and refine our production methods, we will update our estimates if necessary.

(b)Solar salts deposited annually substantially exceed the amount converted into finished products. The amount presented here represents an approximate average amount produced based on recent market demand.

(c)The magnesium chloride amount includes both brine and flake.

Actual annual Salt production volume levels may vary from the annual production capacity shown in the table above due to a number of factors, including variations in the winter weather conditions which impact demand for highway and consumer deicing products, the quality of the reserves and the nature of the geologic formation that we are mining at a particular time, unplanned downtime due to safety concerns, incidents and mechanical failures, and other operating conditions. The chart below shows annual Salt production volumes, including magnesium chloride, at our owned and leased production locations:

* Excludes solar salt harvested at our Ogden facility that is not converted into finished product and salt processed at our packaging facilities.

Our production facilities have access to vast mineral deposits. At all of our production locations, we estimate the recoverable salt reserves to last at least several more decades at current production rates and capacities. Our rights to extract those minerals may be contractually limited by geographic boundaries or time. We believe that we will be able to continue extending these agreements, as we have in the past, at commercially reasonable terms without incurring substantial costs or material modifications to the existing lease terms and conditions, thereby allowing us to fully utilize our existing mineral rights.

Our underground mines in Canada (Goderich, Ontario), the U.S. (Cote Blanche, Louisiana) and the U.K. (Winsford, Cheshire) make up 85% of our salt production capacity as of December 31, 2020. Each of these mines is operated with modern

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mining equipment and utilizes subsurface improvements, such as vertical shaft lift systems, milling and crushing facilities, maintenance and repair shops and extensive raw materials handling systems.

We own the mine site at Goderich, Ontario and maintain a mineral lease for mineral reserves with the provincial government, which grants us the right to mine salt at this site. This mineral lease expires in 2022, and we have an option to renew the lease until 2043 after demonstrating to the lessor that the mine’s useful life is greater than the term of the lease. The Cote Blanche mine is operated under land and mineral leases with third-party landowners who grant us the right to mine salt. The mine site and salt reserves at the Winsford mine are owned. We regularly perform mineral reserve studies at our mines to confirm the remaining mineral reserves. The table below reflects current information about our mines:

Mine	Years in operation	Remaining reserve*	Remaining mine life*
Goderich	61 years	541.3 million tons	83 years
Cote Blanche	55 years	303.8 million tons	101 years
Winsford	175 years	28.0 million tons	28 years

*Based upon the average rates of production used in the latest mineral study.

Our mineral interests are amortized on an individual mine basis over estimated useful lives not exceeding 99 years primarily using the units-of-production method. Our mineral reserve estimates of the remaining tons are derived from periodic reserve studies completed by third-party geological engineering firms. Our mineral reserve estimates and the third-party reserve studies are based on many factors, including the area and volume covered by our mining rights, assumptions regarding our extraction rates based upon an expectation of operating the mines on a long-term basis and the quality of in-place reserves. Established criteria for proven and probable reserves are primarily applicable to mining deposits of discontinuous metal, where both the presence of ore and its variable grade need to be precisely identified. However, the massive continuous nature of evaporative deposits, such as salt deposits, requires proportionately less data for the same degree of confidence in mineral reserves, both in terms of quantity and quality. Reserve studies performed by third-party geological engineering firms suggest that most of our mineral reserves are characterized as probable mineral reserves, with smaller quantities as proven mineral reserves. We have classified our mineral reserves as probable reserves.

In 2012, we acquired mining rights to approximately 100 million tons of salt reserves in the Chilean Atacama Desert. This reserve estimate is based upon an initial report. We will need to complete a feasibility study before we proceed with the development of this project to ensure our salt reserves are probable. The development of this project will require significant infrastructure to establish extraction and logistics capabilities. As of December 31, 2020, our investment in these rights totaled $7.5 million.

We package our Salt products at three additional Company-owned and operated facilities. We estimate that our annual combined packaging capacity at these three facilities is 275,000 tons. Our packaging capacity is based on our estimate of the tons that can be packaged at these facilities assuming a normal amount of scheduled down-time and operation of our facilities under normal working conditions, including staffing levels. We have the capability to significantly increase our annual packaging capacity by increasing our staffing levels in response to demand.

Products and Sales

We sell our Salt products through our highway deicing product line (which includes brine magnesium chloride as well as rock salt treated with this mineral) and our consumer and industrial product line (which includes salt as well as products containing magnesium chloride and calcium chloride in both pure form and blended with salt).

Highway deicing, including salt sold to chemical customers, constituted 61% of our 2020 Salt segment gross sales. Our principal customers are states, provinces, counties, municipalities and road maintenance contractors that purchase bulk deicing salt, both treated and untreated, for ice control on public roadways. Highway deicing salt in North America is sold primarily through an annual tendered bid contract process with governmental entities, as well as through multi-year contracts, with price, product quality and delivery capabilities as the primary competitive market factors. Some sales also occur through negotiated sales contracts with third-party customers, particularly in the U.K. Since transportation costs are a relatively large portion of the cost to deliver products to customers, locations of salt sources and distribution networks also play a significant role in the ability of suppliers to cost-effectively serve customers. We have an extensive network of approximately 80 depots for storage and distribution of highway deicing salt in North America. The majority of these depots are located on the Great Lakes and the Mississippi River and Ohio River systems. Deicing salt product from our Ogden facility supplies customers in the Western and upper Midwest regions of the U.S. Treated rock salt, which is typically rock salt with magnesium chloride brine and organic materials that enhance the salt’s performance, is sold throughout our markets.

We believe our production capability at our Winsford mine and favorable logistics position enhance our ability to meet the U.K.’s winter demands. Due to our strong position, we are viewed as a key supplier by the U.K.’s Highways Agency. In the U.K., approximately 75% of our highway deicing customers have multi-year contracts.

Winter weather variability is the most significant factor affecting salt sales for deicing applications, because mild winters reduce the need for salt used in ice and snow control. On average, over the last three years, approximately two-thirds of our

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deicing product sales occurred during the North American and European winter months of November through March. The vast majority of our North American deicing sales are made in Canada and the Midwestern U.S. where inclement weather during the winter months causes dangerous road conditions. In keeping with industry practice, we stockpile salt to meet estimated requirements for the next winter season. See “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Seasonality” for more information on the seasonality of our Salt segment results.

Our principal chemical customers are producers of intermediate chemical products used in the production of vinyls and other chemicals, pulp and paper, as well as water treatment and a variety of other industrial uses. We typically have multi-year supply agreements with these customers. Price, service, product quality and security of supply are the major competitive market factors.

Sales of our consumer and industrial products accounted for 39% of our 2020 Salt segment sales. We are the third largest producer of consumer and industrial salt products in North America. These products include commercial and consumer applications, such as water conditioning, consumer and professional ice control, food processing, agricultural applications, table salt and a variety of industrial applications. We believe we are among the largest private-label producers of water conditioning salt in North America and of table salt in Canada. Our Sifto brand encompasses a full line of salt products, which are well recognized in Canada.

Our consumer and industrial business has broad product lines with both private-label and Company brands. Our consumer and industrial product line is distributed through many channels including retail, agricultural, industrial, janitorial and sanitation, and resellers. These consumer and industrial products are channeled from our plants and third-party warehouses to our customers using a combination of direct sales personnel, contract personnel and a network of brokers or manufacturers’ representatives.

The chart below shows our annual sales volumes of Salt products:

Competition

We face strong competition in each of the markets in which we operate. In North America, other large, nationally and internationally recognized companies compete with our Salt products. In addition, there are also several smaller regional producers of salt. There are several importers of salt into North America, which mostly impact the East Coast and West Coast of the U.S. where we have minimal market presence. Two competitors serve the highway deicing salt market in the U.K., one in Northern England and one in Northern Ireland. Typically, there are not significant imports of highway deicing salt into the U.K. 

Salt is a commodity, which limits the potential for product differentiation and increases competition. Additionally, low barriers to entry in the consumer and industrial markets increase competition. Our advantageous geographical locations, superior assets and distribution network strengthen our competitive position.

PLANT NUTRITION

Overview

Fertilizers are critical for efficient crop production using the limited arable land resources available around the world. The nutrients needed to ensure plant health can be divided into three categories:

•macro nutrients - the traditional NPK fertilizers (nitrogen (N), phosphorus (P) and potassium (K)),

•secondary nutrients - calcium, magnesium and sulfur, and

•specialty plant nutrients - trace elements of iron, manganese, copper, boron, zinc, molybdenum, chlorine and nickel.

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In addition, a wide range of nutritional and functional enhancers, biostimulants and adjuvants are critical for a plant’s metabolic processes and overall stress and disease resistance. The application and necessity of essential nutritional supplements is based on Liebig’s Law of the Minimum, which is the principle that only by increasing the amount of the scarcest nutrient can the growth of a plant or crop be enhanced, despite the plentiful presence of other nutrients. In parallel, the increased adoption of technologically advanced seeds (both conventional and genetically modified) has driven farmers around the globe to address the higher nutritional demands of crops and to apply essential nutritional supplements to unlock the yield potential embedded in these seeds.

Our plant nutrition businesses focus on higher-value plant nutrients including SOP, specialty formulations of macro fertilizers and a wide range of high-value specialty products incorporating secondary nutrients, specialty plant nutrients and nutritional and functional enhancers. Our products contribute to improved overall plant-metabolism, nutrient uptake and fixing, stress resistance, plant defense mechanisms, energy conversion, cell division, root enhancement and leaf, flower and fruit formation, among other benefits. The yield-enhancing properties of these supplements have been shown to provide significant farm productivity gains. Our plant nutrition strategy is based upon maximizing the profitability of our current product portfolio, innovating new technology-driven products and robust commercialization of these technologies globally.

 Factors influencing the plant nutrition market include world grain and food supply, currency fluctuations, weather and climate change, grower incomes, changes in consumer diets, general levels of economic activity, government food programs, governmental agriculture and energy policies in the U.S. and around the world, and the amount or type of crop grown in certain locations, or the type or amount of fertilizer product used. In addition, our plant nutrition results can be impacted by seasonality (see “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Seasonality” for more information).

In 2020, our plant nutrition businesses, on a combined basis, accounted for 43% of our sales (see Part II, Item 8, Note 15 to our Consolidated Financial Statements for segment financial information). The chart below shows our 2020 plant nutrition businesses sales by geography:

PLANT NUTRITION NORTH AMERICA SEGMENT

Industry Overview

Our Plant Nutrition North America segment includes sales of SOP and specialty plant nutrients. There are two major forms of potassium-based fertilizer, SOP, a specialty form of potassium which also provides plant-ready sulfur, and muriate of potash (“MOP” or “KCl”). Based on management’s estimates, the average annual worldwide consumption of all potash fertilizers is approximately 88 million tons, with MOP accounting for over 85% of all potash used in fertilizer production. SOP represents approximately 8% of all potash production. The remainder of potash is supplied in forms containing varying concentrations of potassium (expressed as potassium oxide) along with different combinations of co-nutrients. SOP, which contains the equivalent of approximately 50% potassium oxide, maintains a price premium over MOP due to the fact that it contains the secondary nutrient, sulfur, does not contain chlorides and is more expensive to produce than MOP. Additionally, many high-value or chloride-sensitive crops experience improved yields and quality when SOP is applied instead of MOP. SOP is also a more cost-effective alternative to other forms of specialty potash.

Our North American SOP sales are concentrated in the Western and Southeastern U.S. where the crops and soil conditions favor the use of low-chloride potassium nutrients. Consequently, weather patterns and field conditions in these locations can impact Plant Nutrition North America sales volumes.

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While long-term global consumption of potash has increased in response to growing populations and the need for additional food supplies, the market for commodity potash has been challenged over the last few years due to a downturn in the broader crop market which has pressured grower incomes. However, recently improved economics for row crops has led to an improved commodity potash market. We expect the long-term demand for all potassium nutrients to continue to grow as arable land per capita decreases, thereby encouraging improved crop yields. Additionally demand for our SOP products has been resilient despite the challenges facing the global potash market.

We expect our future growth to stem from continuing to build the North American specialty fertilizer market demand through the innovation and commercialization of our products and the conversion of certain commodity potassium applications into higher yield SOP applications.

Approximately 91% of our Plant Nutrition North America sales in 2020 were made to U.S. customers, who include retail fertilizer dealers and distributors of agricultural products as well as professional turf care customers. In some cases, these dealers and distributors combine or blend our Plant Nutrition North America products with other fertilizers and minerals to produce fertilizer blends tailored to individual requirements.

Operations and Facilities

We produce SOP at two facilities, both located in North America, namely at our Ogden facility on the Great Salt Lake, and our Wynyard, Saskatchewan, Canada facility on Big Quill Lake. Our Ogden facility is the largest SOP production site in the western hemisphere and one of only four large-scale solar brine evaporation operations for SOP in the world. The facility operates approximately 55,000 acres of solar evaporation ponds to produce SOP and salt, including magnesium chloride, from the Great Salt Lake’s naturally occurring brine. The facility is located on land that is both owned and leased under renewable leases from the State of Utah. We believe that our property and operating equipment are maintained in good working condition. This facility has the capability to produce up to 320,000 tons of solar pond-based SOP, approximately 750,000 tons of magnesium chloride and 1.5 million tons of salt annually when weather conditions are typical.

These recoverable minerals exist in vast quantities in the Great Salt Lake. We believe the recoverable minerals exceed 100 years of reserves at current production rates and capacities and the lake quantities are so vast that they will not be significantly impacted by our production. While our rights to extract these minerals are contractually limited, we believe we will be able to extend our lease agreements, as we have in the past, at commercially reasonable terms, without incurring substantial costs or incurring material modifications to the existing lease terms and conditions.

Initially, we draw mineral-rich lake water, or brine, from the Great Salt Lake into our solar evaporation ponds. The brine moves through a series of solar evaporation ponds over a two- to three-year production cycle. As the water evaporates and the mineral concentration increases, some of those minerals naturally precipitate out of the brine and are deposited on the pond floors. These deposits provide the minerals necessary for processing into SOP, salt and magnesium chloride. The evaporation process is dependent upon sufficient lake brine levels and hot, arid summer weather conditions. The potassium-bearing salts are mechanically harvested out of the solar evaporation ponds and refined to high-purity SOP in our production facility.

We also have a unique ability to use KCl and other potassium-rich minerals as a raw material feedstock to supplement our solar harvest to help meet demand when it is economically feasible.

We have invested to increase the efficiency and expand the capacity of our Ogden facility through upgrades to our processing plant and our solar evaporation ponds. These investments have included modifications to our existing solar evaporation ponds to increase the annual solar harvest and the extraction yield from the harvest and processing capacity of our SOP plant. In 2017, we completed a project to further expand our SOP production capacity by augmenting our ability to convert KCl into SOP. As a result, our annual SOP production capacity at our Ogden facility can be scaled up to approximately 550,000 tons, including amounts produced with both solar-pond based feedstock and supplemental KCl feedstock.

We also own our Wynyard, Saskatchewan facility, which contributes 40,000 tons to our annual SOP capacity and is Canada’s only SOP production facility. At this facility, we combine sulfate-rich brine with sourced potassium chloride to create SOP through ion exchange and glaserite processes. This product is high purity and is used in crop nutrient applications as well as specialty, non-agricultural applications.

We hold numerous environmental and mineral extraction permits, water rights and other permits, licenses and approvals from governmental authorities authorizing operations at each of our facilities.

Products and Sales

We currently generate most of our sales and earnings in our Plant Nutrition North America segment through the production and sale of SOP. Our SOP is sold in various grades under our Protassium+ brand. Our Protassium+ product line consists of different grades sized for use in broadcast spreaders, direct application and liquid fertilizer solutions. Our turf product line consists of grades sized for use by the turf and ornamental markets and for blends used on golf course greens. We also provide an organic product line with grades sized for a wide range of applications.

We also develop and distribute specialty plant nutrients under our Wolf Trax and other brands. These innovative products are based upon proprietary technologies and are focused on improving application efficiency and yield potential through various means, including by increasing root interception points in order to provide accessible plant nutrition at key

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developmental stages as well as via fertigation, seasonal foliar applications and seed nutrition. Our Wolf Trax and other specialty plant nutrition products contain nutrients that are essential to a wide range of crops, including commodity row crops, with different plants and soil conditions requiring different specialty plant nutrients.

Our Protassium+ and specialty plant nutrition product lines are generally sold to crop input distributors and dealers who then sell our product to farmers and growers. Our commercial efforts focus on educating and selling the agronomic benefits of SOP as a source of potassium nutrients and various specialty plant nutrients to plant health.

Competition

SOP is marketed globally with approximately 60% of the world’s 10 million tons of estimated capacity located in China. Management estimates global SOP capacity to be as follows:

We are the leading SOP producer and marketer in North America and we also market SOP products internationally, depending on market conditions. Our major competition for SOP sales in North America includes imports from the EU. Fluctuations in the values of foreign currencies in relation to the U.S. dollar coupled with Baltic freight rates impact the level of international competition we face. As the only SOP producer with production facilities in North America, and as a result of our logistically favorable production site near Ogden, Utah, we estimate that our share of the North American market is sizable. In addition to imported SOP, there is functional competition between SOP and other forms of potassium crop nutrients, such as MOP. The specialty plant nutrient market is highly fragmented. Commodity and specialty crops require specialty plant nutrients in varying degrees depending on the crop and soil conditions. While sales of Wolf Trax products have historically been concentrated in North America, we also sell our specialty plant nutrient products globally, primarily in the EU, Central America, South America and the Caribbean.

PLANT NUTRITION SOUTH AMERICA SEGMENT

Industry Overview

Our Plant Nutrition South America segment manufactures, distributes and markets a wide array of specialty plant nutrients and supplements developed and formulated from essential primary and secondary nutrients, specialty plant nutrients and biostimulants. These products consist of different chemical molecules, chemical compositions and production processes than conventional NPK fertilizers. This specific category of plant nutrients offers a diversity of delivery mechanisms, low environmental impact, low dosages per acre, and reflects a high degree of innovation and product development. These products also require more marketing than conventional NPK fertilizers, among other differences. Brazilian soils are naturally deficient in nutrients such as zinc, manganese and boron, among others. We estimate that Brazilian farmers, on average, only use approximately 25% of the optimal prescription of essential nutritional supplements. During 2020, 79% of sales generated by Plant Nutrition South America were derived from the manufacturing and marketing of these agricultural products. We believe we are one of the market leaders in Brazil and offer a more comprehensive range of products and brands compared to our competitors.

In addition to agriculture products, this segment produces water and wastewater treatment chemicals in Brazil for cleaning, decontaminating and purifying water as well as process chemicals for industrial use. This business benefits from the rapidly expanding focus on, and increased investment in, improving standards for drinking water purification and wastewater treatment. Our water treatment customers include state and municipal entities, wastewater treatment companies and manufacturing

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companies that treat their own wastewater. Our chemical solutions business also benefits from growth in Brazilian industrial sectors that use our products, including the oil and gas exploration, mining, pulp and paper production and ethanol production industries. Our involvement in both businesses allows us to benefit from greater purchasing power with suppliers given that a significant portion of the mineral inputs for both businesses are identical. In 2020, 21% of sales generated by Plant Nutrition South America were derived from our chemical solutions business.

Our strategy for Plant Nutrition South America is to leverage our innovative product portfolio and direct-to-farmer sales platform. We expect to continue to drive market growth by increasing the adoption rate and acre penetration of nutritional supplements. Our plan is to reinforce the use of these supplements as a profitable tool to enhance crop productivity. We use a three-pronged approach to deliver under our strategy, consisting of (1) our specialized agronomic research teams, (2) our technical in-the-field agronomic sales force, and (3) continuous innovation.

We expect to increase sales through new product introductions and growth in direct-to-farmer distribution channels. We continually invest in the development of new products and new generations of existing products that meet the specific needs of our customers. As a result of these efforts, our direct-to-end-customer sales to large farmers have increased as a proportion of total agriculture productivity revenues.

Operations and Facilities

We operate nine production facilities throughout Brazil, including a property we jointly operate with a third-party. Our production facilities are located in the Southeast and Northeast parts of Brazil. Our Plant Nutrition South America production facility network has a significant level of integration. While some production facilities are focused on producing chemical and physical transformation of ingredients, such as our Jacareí I production facility with sulfur derivatives, others are specialized in transforming these ingredients into final products for our customers by mixing them with other ingredients produced in different or the same production facilities. We also use by-products from one production facility as a raw material for another production facility where possible.

The table below shows our Plant Nutrition South America production facilities by product line:

	Production Facility
	Suzano I	Suzano II	Igarassu	Mauá	Uberlândia	Fermavi(a)	Reluz Nordeste	Jacareí I	Jacareí II
Agriculture Productivity	X	X		X	X	X		X	X
Chemical Solutions	X		X			X	X

(a)We hold a 50% ownership interest through a joint venture with Fermavi Eletroquímica Ltda.

Our products are produced through a series of chemical and physical transformations in automated reactors, granulators, grinders and mixers. Our equipment is capable of processing both primary and secondary sources of raw materials, thus enabling us to rapidly remodel our production process to deal with variations in element concentration in raw material feeds. This also allows us flexibility with regard to raw material purchasing opportunities, allowing us to purchase products that are less expensive on a percentage-contained-metal-basis.

Products and Sales

As of December 31, 2020, our total Plant Nutrition South America portfolio consisted of approximately 875 products, including approximately 650 in agriculture productivity and 225 in chemical solutions. The agriculture productivity products may be applied for different stages of a plant’s life cycle, different soil and other growing conditions, different crop types and using different delivery mechanisms. We also provide value-added services to our customers such as soil analysis programs, technical trainings and conferences, crop field test and research, sales support and specialized technical support, which allow us to tailor our Plant Nutrition South America products and sales to a wide variety of customers, diverse types of crops and multiple regions. Through our chemical solutions business, we manufacture, market and supply water treatment products and chemicals for industrial processes. Our water treatment products have many different uses including algae control, alkalinity control, disinfection control, odor and corrosion control, water filtration and water clarification.

Competition

Agricultural Productivity - The Brazilian market for nutritional supplements is highly fragmented with hundreds of market participants. Competitors typically focus their product offerings on specific product categories and delivery mechanisms, geographic regions and selected crops. As a result, we have different competitors for different market situations. The international competitive landscape is also fragmented. We estimate there are approximately 19 international competitors present in Brazil, mainly from the EU.

Market consolidation is likely to continue in the future, as players are challenged to keep up with demands for product innovation, increasingly specialized agronomic and technical skills, the effect of specific legislation, licensing and product registration procedures, cost pressures from economies of scale and other industry trends. Many competitors have limited production capabilities and can better be characterized as resellers, mixers and marketing companies, rather than producers. We

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differentiate ourselves by innovation, a broad market presence using a large technical sales force, an extensive network of point-of-sales distributors, resellers and cooperatives and direct sales to large farmers and industrial customers. This presence enhances our new product placement capabilities, thereby driving market growth.

Chemical Solutions - We believe we are one of the largest manufacturers of water treatment chemicals in Brazil. We have a strong presence in the Northeast and Southeast regions of Brazil, which allows us to take advantage of efficient logistics due to proximity to raw materials and customers. We estimate that there are approximately five companies that account for approximately two-thirds of the Brazilian water treatment market. However, as the water treatment market is highly regional by nature, average market shares do not reflect the actual competitive strength for each company by geography, product and customer type. Our strategy is to focus on the regions in which our production facilities are located and where our product’s attributes give us a naturally strong market positions.

In the case of public customers, suppliers of water treatment chemicals compete through a pre-qualification and public bidding process. Barriers to market entry are therefore related to low cost of production (strongly influenced by access to low raw material costs, reduced logistics and large production scale), consistency of product quality and specification, existing customer relationships and previous supply experience.

We believe we are among the seven primary producers of caustic soda, chlorine and bleach in Brazil. Our market position is substantially stronger in the North and Northeast regions of Brazil where we operate.

OTHER

DeepStore is our records management business in the U.K. that utilizes portions of previously excavated space in our salt mine in Winsford, Cheshire, for secure underground document storage and one warehouse location in London, England. Currently, DeepStore does not have a significant share of the document storage market in the U.K., and it is not material in comparison to our Salt, Plant Nutrition North America and Plant Nutrition South America segments.

INTELLECTUAL PROPERTY

To protect our intellectual property, we rely on a combination of patents, trademarks, copyrights, trade secret protection, employee and third-party non-disclosure agreements, license arrangements and domain name registrations. These protections are important to our business and we believe that our success is at least partly dependent on the acquisition and maintenance of these rights. However, we rely primarily on the innovative skills, technical competence, operational knowledge and marketing abilities required by our business in order to succeed.

We sell many of our products under a number of registered trademarks that we believe are widely recognized in the industry. Our trademarks registered pursuant to applicable intellectual property laws include COMPASS MINERALS, PROTASSIUM+, WOLF TRAX (and design), NU-TRAX, PROAQUA, KELLUS, ROCKET SEEDS, PROFOL, AMERICAN STOCKMAN, FREEZGARD, SAFE STEP, SIFTO and SURE PAWS.

Any issued patents, trademarks or copyrights on our proprietary technology may not provide us with substantial protection or be commercially beneficial to us. The issuance of a patent is not conclusive as to its validity or its enforceability. Competitors may challenge our patent rights. If our patents are held unenforceable, our competitors could commercialize our patented technology.

With respect to proprietary know-how, we rely on trade secret protection and confidentiality agreements. Monitoring the unauthorized use of our technology is difficult, and we may not be able to prevent unauthorized use of our technology. The disclosure or misappropriation of our intellectual property could harm our ability to protect our rights and our competitive position (see “Risk Factors—Our intellectual property may be misappropriated or subject to claims of infringement.” for more information).

HUMAN CAPITAL MANAGEMENT

As of December 31, 2020, we employed 3,229 employees, of which 1,224 were located in Brazil, 1,051 were located in the U.S., 780 were located in Canada and 174 were located in the U.K. Approximately 50% of our workforce in the U.S., Canada and the U.K. and approximately 30% of our global workforce were represented by collective bargaining agreements. Of our 12 collective bargaining agreements in effect on January 1, 2021, two will expire in 2021 (including one for the Goderich mine, which expires on March 31, 2021), five will expire in 2022, three will expire in 2023 and one will expire in 2027. In addition, trade union membership is mandatory in Brazil, where approximately 40% of our global workforce is located as of December 31, 2020.

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Environmental, Health and Safety

At Compass Minerals, we place no priority higher than the health and safety of our employees, and the commitments we have made to our stockholders, customers and communities to create a sustainable company for generations to come. We work to ensure safety throughout our operations and in the communities where we are located. We focus on ongoing education with respect to environmental, health and safety matters, and injury prevention and reduction across all our operations.

Our Company has a comprehensive approach to workplace health and safety that fosters a strong safety culture. We have identified “Top Risks” that are consistently discussed to help keep them top-of-mind. One of our strategic imperatives is “Zero Harm,” which includes measuring our total case incident rate (“TCIR”). In 2020, we reduced our TCIR by 16% compared to the prior year.

COVID-19 Pandemic

The ongoing COVID-19 pandemic has negatively affected the global economy, disrupted global supply chains and created significant volatility and disruption of financial markets. As part of our focus on Zero Harm, we created a cross-functional Crisis Management Team to monitor developments related to the spread of COVID-19, take appropriate steps to protect our workforce and review business continuity protocols that were already in place.

As an essential business, we have continued producing and delivering products that support critical industries such as transportation, agriculture, chemical, food, pharmaceutical and animal nutrition. Our management team has taken multiple actions to limit the exposure of employees to the spread of COVID-19, including instituting remote working where possible, adjusting shift schedules and crew sizes to enable social distancing, restricting visitation to operational sites, curtailing all business-related commercial air travel, and increasing sanitation of offices and common areas within our facilities. See Item 1A Risk Factors - “The COVID-19 pandemic, or other outbreaks of infectious disease or similar public health threats, could materially and adversely affect our business, financial condition and results of operations” and Part II, Item 7 for more information.

Organizational Health

We launched an enterprise-wide campaign in 2020 to improve organizational health, understanding its impact on long-term performance and sustainability of the organization. We identified nine priority health practices to help provide focus and set a compelling, clear direction for employees, encourage the generation of ideas from within and across the enterprise, and execute in a disciplined way with strengthened accountability. To underline this commitment, we launched an employee network of Health Champions, a resource for sharing information about our business and health practices among peers.

We integrate organizational health practices into our professional development efforts to better equip employees with skills to work, lead and coach others in their day-to-day responsibilities.

In the fourth quarter of 2020, 90% of our employees participated in an annual organizational health index (“OHI”) survey in which 55% of employees reported they believe our Company health improved within the prior six months and our overall OHI score more than doubled compared to a 2019 OHI survey.

Diversity & Inclusion

We value the critical role our employees play in our success. They are in fact our most important resource. We believe it is paramount that we build a diverse and inclusive organization where our employees are safe, where they feel valued and heard, where they can thrive and grow professionally, and where they can take pride in their work and our Company.

In 2020, we created a new role, Vice President of Diversity, Inclusion and Belonging, to lead our efforts toward ensuring policies and practices foster an inclusive, diverse and equitable environment for all employees. Additionally, we launched a focus group of U.S. employees representing various ages, genders, races, ethnicities, sexual orientations and backgrounds to provide guidance on our diversity and inclusion initiatives. Because one approach does not effectively work across multiple countries when it comes to diversity, our diversity and inclusion efforts may adjust as they are implemented in other countries in which we operate. To help demonstrate our commitment to the fair treatment of all, President and Chief Executive Officer (“CEO”) Kevin S. Crutchfield joined other CEOs around the world in signing the CEO Action for Diversity & Inclusion pledge.

Also in 2020, we introduced a Parental Leave policy that provides all regular full-time U.S. employees, regardless of gender and including adoptive parents, with the opportunity to take up to six weeks of paid leave to bond with a new child at 100% of base pay rate. We also joined a program offered through the Brazil government that increases paternal leave to 20 days and maternal leave to six months for our Brazil employees.

We also have LINK (Leading, Inspiring, Networking and Knowing) employee resource groups that help our people grow and succeed through mentoring and professional development. These LINK groups demonstrate how inclusion is able to enhance employee engagement, create opportunities and drive business results.

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Employee Development

Our employees have access to a robust learning management system as a resource to support personal and professional growth. The platforms offer a one-stop online site for employee training and development. Programs range from managing priorities to assistance for new supervisors. Also included is the Compass Leadership Essential (“CLE”) series, which launched in 2020. Compass Leadership Essentials is required learning for our people managers and aims to further develop business capabilities in order to build stronger leaders. In 2020, CLE launched at our North American sites and we plan to introduce CLE to our U.K. and Brazil sites in the future.

In 2020, we implemented an expanded talent review program, which included increasing the use of individual development plans, consistent reviews and succession planning. As of December 31, 2020, 100% of our critical positions have a succession plan in place, along with individual development plans to help ensure business continuity.

Additionally, employees have opportunities for professional development through strategic partnerships with outside organizations, such as The Fertilizer Institute; U.K. Salt Association; Industrial Minerals Association – North America; Central Exchange; Ontario Mining Association; American Chamber of Commerce for Brazil; Institute of Materials, Minerals and Mining; American Royal; Brazilian Human Resources Association; and Women in Agribusiness, to name a few.

Community

Beyond the success of our company and our people, we are committed to supporting and creating value for our communities. We recognize that in many areas, we play an integral role in providing jobs and fostering local economic growth. On a larger scale, through our products, we support safety, sustainability and addressing food insecurity in communities around the world.

Compass Minerals Cares, our philanthropic program, helps our Company and our employees positively impact the communities where we live and work, and creates a great sense of pride in our employees. This program focuses on our core pillars of community engagement, including company gifts and volunteerism.

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PROPERTIES

We have leases for packaging facilities and other facilities, which are not individually material to our business. The table below sets forth our principal properties as of December 31, 2020:

		Land and Related Surface Rights		Mineral Reserves
Name, Location	Use	Owned/ Leased	Expiration of  Lease	Owned/ Leased	Expiration of Lease
Cote Blanche, Louisiana	Rock salt production facility	Leased	2060(1)	Leased	2060(1)
Lyons, Kansas	Evaporated salt production facility	Owned	N/A	Owned	N/A
Ogden, Utah	SOP, solar salt and magnesium  chloride production facility	Owned	N/A	Leased	(2)
Wynyard, Saskatchewan, Canada	SOP production facility	Owned(3)	N/A	Leased	2040(4)
Amherst, Nova Scotia, Canada	Evaporated salt production facility	Owned	N/A	Leased	2023(5)
Goderich, Ontario, Canada	Rock salt production facility	Owned	N/A	Leased	2022(5)
Goderich, Ontario, Canada	Evaporated salt production facility	Owned	N/A	Owned	N/A
Unity, Saskatchewan, Canada	Evaporated salt production facility	Owned	N/A	Leased	2037/2030(6)
Winsford, Cheshire, United Kingdom	Rock salt production facility; records  management	Owned	N/A	Owned	N/A
London, United Kingdom	Records management	Leased	2028	N/A	N/A
Suzano I, São Paulo, Brazil	Nutritional supplements and other chemicals production facility	Owned	N/A	N/A	N/A
Suzano II, São Paulo, Brazil	Nutritional supplements packaging facility	Owned	N/A	N/A	N/A
Igarassu, Pernambuco, Brazil	Various chemicals production facility	Owned	N/A	N/A	N/A
Mauá, São Paulo, Brazil	Nutritional supplements production facility	Owned	N/A	N/A	N/A
Uberlândia, Minas Gerais, Brazil	Mineral supplements for beef cattle and milk	Owned	N/A	N/A	N/A
Fermavi, Minas Gerais, Brazil(7)	Nutritional supplements, water treatment, and other chemicals production facility	Owned	N/A	N/A	N/A
Reluz Nordeste, Alagoas, Brazil	Water treatment and other chemicals production facility	Owned	N/A	N/A	N/A
Jacareí I, São Paulo, Brazil	Nutritional supplements production facility	Owned	N/A	N/A	N/A
Jacareí II, São Paulo, Brazil	Nutritional supplements production and warehouse	Leased	2027	N/A	N/A
Overland Park, Kansas	Corporate headquarters	Leased	2030	N/A	N/A
Paulista, São Paulo, Brazil	Compass Minerals América do Sul headquarters	Leased	2023(8)	N/A	N/A

(1)The Cote Blanche lease includes two 25-year renewal options.

(2)The Ogden lease renews on an annual basis.

(3)The Wynyard location also has leases expiring in 2026 for two parcels of land.

(4)The Wynyard mineral lease may be renewed for additional 20-year periods.

(5)Subject to our right of renewal through 2043.

(6)Consists of a lease expiring in 2037 and a lease expiring in 2030 subject to our right of renewal through 2051.

(7)Held through a 50% ownership interest in a joint venture with Fermavi Eletroquímica Ltda.

(8)Consists of several leases which can be extended upon their expiration.

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With respect to each facility at which we produce salt, brine or SOP, permits, licenses and approvals are obtained as needed in the normal course of business based on our mine plans and federal, state, provincial and local regulatory provisions regarding mine permitting and licensing. Based on our historical permitting experience, we expect to be able to continue to obtain necessary mining permits and approvals to support historical rates of production.

Our mineral leases have varying terms. Some will expire after a set term of years, while others continue indefinitely. Many of these leases provide for a royalty payment to the lessor based on a specific amount per ton of minerals extracted or as a percentage of revenue. In addition, we own a number of properties and are party to non-mining leases that permit us to perform activities that are ancillary to our mining operations, such as surface use leases for storage at depots and warehouse leases. We believe that all of our leases were entered into at market terms.

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The following map shows the locations of our principal operating facilities as of December 31, 2020:

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ENVIRONMENTAL, HEALTH AND SAFETY AND OTHER REGULATORY MATTERS

Environmental, Health and Safety Matters

Our operations subject us to an evolving set of federal, state, local and foreign environmental, health and safety (“EHS”) laws and regulations. These EHS laws and regulations regulate, or propose to regulate, the conduct of our mining and production operations, including safety procedures and process safety management; management and handling of raw and in-process materials and finished products; air and water quality impacts from our facilities; management of hazardous and solid wastes; remediation of contamination at our facilities; and post-mining land reclamation.

The Environment, Health, Safety and Sustainability Committee of our Board of Directors works closely with our management to provide oversight of EHS and sustainability matters impacting us to promote a culture that prioritizes safety, environmental stewardship and sustainability. The committee monitors our EHS and sustainability performance against our targets and objectives. We have a comprehensive EHS management program that strives to consistently achieve predictable performance. Our EHS program includes identifying and managing EHS risks; regulatory compliance; effective policies and procedures; behavior based safety; training and education; facility evaluations; and site leadership accountability for EHS performance and sustainable growth with support from EHS professionals. Site leadership is responsible for day-to-day oversight of EHS performance at their specific location.

While a number of our capital projects indirectly result in environmental improvements, we estimate that our 2020 environmental-specific capital expenditures were $2.2 million. We expect to have approximately the same level of environmental capital expenditures in 2021. However, future capital expenditures are subject to a number of uncertainties, including changes to environmental laws and regulations, changes to our operations or unforeseen remediation requirements, and these expenditures could exceed our expectations.

As of December 31, 2020, we had recorded $2.0 million of accruals for contingent environmental liabilities. We accrue for contingent environmental liabilities when we believe it is probable that we will be responsible, in whole or in part, for environmental investigation or remediation activities and the expenditures for these activities are reasonably estimable. However, the extent and costs of any environmental investigation or remediation activities are uncertain and difficult to estimate and could exceed our expectations, which could materially affect our financial condition and operating results.

Operating Requirements and Impacts

Our operations require permits for extraction of salt and brine, air emissions, surface water discharges of process material and wastes, waste generation, injection of brine and wastewater in to subsurface wells and other activities. As a result, we hold numerous environmental and mineral extraction permits, water rights and other permits, licenses and approvals from governmental authorities authorizing operations at each of our facilities. These permits, licenses and approvals are typically subject to renewals and reissuances. Expansion of our operations or production capacity, or preservation of existing rights in some cases, is also predicated upon securing any necessary permits, licenses and approvals. The terms and conditions of future EHS laws and regulations, permits, licenses and approvals may be more stringent and may require increased expenditures on our part. In addition, although we do not engage in hydraulic fracturing (commonly known as “fracking”), laws and regulations targeting fracking could lead to increased permit requirements and compliance costs for non-fracking operations, including our Salt operations, which require permitted wastewater disposal wells that sometimes receive fluid waste from fracking operations as well.

Our Cote Blanche mine, an underground salt mine located in St. Mary Parish, Louisiana, 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. As required by MSHA, these operations are regularly inspected by MSHA personnel. See “Mine Safety Disclosures” and Exhibit 95 to this report for information concerning mine safety violations and other regulatory matters required by SEC rules. The cost of compliance and penalties for violations of the Mine Act have been and are expected to continue to be significant. Our underground salt mines located in Goderich, Canada and Winsford, UK are subject to similar regulations regarding health and safety, and the cost of compliance with these regulations also have been and are expected to be significant.

We have post-closure reclamation obligations, primarily arising under our mining permits or by agreement. Many of these obligations include requirements to maintain financial surety bonds to fund reclamation and site cleanup following the ultimate closure of our mines or certain other facilities. As a result, we maintain financial surety bonds to satisfy these obligations.

We are also impacted by the U.S. Clean Air Act (the “Clean Air Act”) and other EHS laws and regulations that regulate air emissions. These regulatory programs may require us to make capital expenditures (for example, by installing expensive emissions abatement equipment), modify our operational practices, obtain additional permits or make other expenditures, which could be significant. Pursuant to the Clean Air Act, the Environmental Protection Agency reclassified the Salt Lake area as a “serious” non-attainment area in May 2017 due to the presence of certain air pollutants. Because our Ogden facility is located in this area, this re-classification could lead to new regulations that could require us to make significant expenditures or require us

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to modify our operational practices. In addition, we could incur fines or penalties for violations of the Clean Air Act or other EHS laws and regulations that regulate air emissions.

In August 2017, the Brazilian government ratified the United Nations Minamata Convention on Mercury, which commits signatories to compel chlor-alkali facilities to phase out the use of mercury cell facilities by 2025, to ensure that mercury from these facilities is disposed of in an environmentally sound manner and to subject these facilities to record keeping and reporting requirements. If the Brazil government adopts regulations limiting the use of mercury pursuant to the convention’s requirements or otherwise, our Igarassu, Brazil facility which operates a mercury cell facility could be impacted. We cannot predict the timing, extent or content of the final regulations related to the United Nations Minamata Convention on Mercury, or their ultimate cost to, or impact on us. To support transitioning away from mercury use at our Igarassu facility, we have invested in, and plan to continue to invest in, non-mercury technology as well as waste water and storm water treatment improvement projects.

We endeavor to conduct our operations in compliance with all applicable EHS laws, regulations, permits or approvals. However, because of extensive and comprehensive regulatory requirements, violations occur from time to time in our industry, and from time to time we have received notices from governmental agencies that we are not in compliance with certain EHS laws, regulations, permits or approvals. Upon receipt of these notices, we evaluate the matter and take all appropriate corrective actions.

Remedial Activities

Many of our past and present facilities have been in operation for decades. Operations at these facilities have historically involved the use and handling of regulated chemical substances, salt, salt byproducts and process tailings by us and our predecessors.

At many of these facilities, releases and disposal of regulated substances have occurred and could occur in the future, which could require us to investigate, undertake or pay for remediation activities under the U.S. Comprehensive Environmental Response, Compensation and Liability Act (“CERCLA”) and other similar EHS laws and regulations. These laws and regulations may impose “no fault” liability on past and present owners and operators of facilities associated with the release or disposal of hazardous substances, regardless of fault or the legality of the original actions. Additionally, one past or present owner or operator may be required to bear more than its proportional share of liability if payments cannot be obtained from other responsible parties.

In addition, third parties have alleged in the past and could allege in the future that our operations have resulted in contamination to neighboring off-site areas or third-party facilities, including third-party disposal facilities for regulated substances generated by our operations, which could result in liability for us under CERCLA or other EHS laws and regulations.

We have incurred and expect to continue to incur costs and liabilities as a result of our current and former operations and our predecessor’s operations. In the past, we have agreed to undertake or pay for investigations to determine whether remediation will be required under CERCLA or otherwise to address any contamination. In other instances, we have agreed to perform remediation activities or have undertaken voluntary remediation to address identified contamination. Ongoing investigation and remediation activities at our property in Kenosha, Wisconsin are described in Part II, Item 8, Note 12 of our Consolidated Financial Statements.

Other Regulatory Matters

As a global company, we are subject to complex and evolving laws and regulations. The most significant government regulations that impact our business, in addition to EHS laws and regulations, operating requirements and remedial activities, are discussed below. For further discussion of how government regulations may impact our business, see Item 1A, “Risk Factors.”

Taxes and Tariffs - We are subject to complex requirements of federal, state, local and foreign laws and regulations related to taxation, tariffs and import duties. See Part II, Item 8, Note 8 of our Consolidated Financial Statements for more information on taxes.

Import and Export Requirements, Anti-Corruption Laws and Related Matters - We manufacture, market and sell our products both inside and outside the U.S. and ship our products across international borders. As a result, we are required to comply with a number of U.S. and international regulations, which include fair competition (antitrust) laws, import and export requirements, customs laws and anti-corruption laws, such as the U.S. Foreign Corrupt Practices Act (the “FCPA”), the Brazilian Clean Companies Act and the U.K. Bribery Act, which generally prohibit the making or offering of improper payments to foreign government officials and political figures for the purpose of obtaining or retaining business or to gain an unfair business advantage.

Employment and Labor Relations - We are also subject to numerous federal, state, local and foreign laws and regulations governing our relationships with our employees, including those relating to wages, overtime, labor matters, working conditions, hiring and firing, non-discrimination, immigration, work permits and employee benefits.

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Impacts of Regulatory Matters

Costs of compliance with laws and regulations, including management effort, time and resources, have been and are expected to continue to be significant. These costs include the capital projects related to environmental improvements discussed above. New or proposed regulatory programs (including EHS regulatory programs), as well as future interpretations and enforcement of existing laws and regulations, may impact our business significantly, our ability to serve customers, preclude us from conducting business with governmental entities, require modification to our facilities, lead to substantial increases in operating costs, penalties, injunctions, civil remedies or fines or cause interruptions, modifications or a termination of operations, the extent to which we cannot predict. Anticipating future compliance obligations, implementing compliance plans and estimating future costs can be particularly challenging while laws and regulations are under development and have not been adopted.

ITEM 1A.    RISK FACTORS

We are subject to a number of risks which could have a material adverse effect on our business, financial condition, results of operations and the value of our securities. You should carefully consider the following risks and all of the information set forth in this report. The risks described below are not the only ones facing our company. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial may also materially and adversely affect our business, financial condition or results of operations.

Operational Risks

Our mining and industrial operations can involve high-risk activities.

Our operations can involve or be subject to significant risks and hazards, including environmental hazards, industrial accidents and natural disasters. Our underground salt mining operations and related processing activities may be subject to industrial and mining accidents, fire, natural disasters, explosions, unusual or unexpected geological formations or movements, water intrusion and flooding. For example, MSHA considers our Cote Blanche mine to be a “gaseous mine” and, as a result, is subject to a heightened risk of explosion and fire. In addition, the types and volumes of certain chemicals manufactured by our Plant Nutrition South America segment’s chemical solutions business pose safety risks, including hazards related to chemical process manufacturing and the related storage, handling and transportation of raw materials, products and wastes. These potential risks include damage or impacts from pipeline and storage tank leaks and ruptures; explosions and fires; mechanical failures; earthquakes, tornadoes, hurricanes, flooding and other natural disasters; and chemical spills and other discharges or releases of toxic or hazardous substances or gases at our sites or during transportation.

These hazardous activities pose significant management challenges and could result in loss of life, a mine shutdown, damage to or destruction of our properties and surrounding properties, production facilities or equipment, production delays or business interruption. Our insurance coverage may be insufficient to cover all losses or claims associated with our operations, including these operational risks.

Geological conditions could lead to a mine shutdown, increased costs and production delays, which could adversely affect results of our operations.

Our salt mining operations involve complex processes, which are affected by the mineralogy of the mineral deposits and structural geologic conditions and are subject to related risks. For example, unexpected geological conditions could lead to significant water inflows and flooding at any of our underground mines, which could result in a mine shutdown, serious injuries, loss of life, increased operational costs, production delays, damage to our mineral deposits and equipment damage. We have minor water inflows at our Cote Blanche and Goderich salt mines that we actively monitor and manage. Underground mining also poses the potential risk of mine collapse or ceiling collapse (such as the September 2017 partial ceiling collapse at our Goderich mine) because of the mine geology, the rate and volume of minerals extracted, among other potential causes. We could also have a ceiling collapse in the brine wells used to extract salt for mechanical evaporation, which could increase costs and cause production delays.

Our mineral reserve estimates of the remaining tons of minerals in our mines are based on many factors, including the area and volume covered by our mining rights, assumptions regarding our extraction rates and duration of mining operations, and the quality of in-place reserves. The actual mineral deposits encountered in our mining operations and the economic viability of mining a mineral deposit may differ materially from our estimates. In addition, we may not be able to access certain mineral deposits as a result of the nature of the geologic formations of our salt mines, which could impact the accuracy of our salt deposit reserve projections.

Variations in the mineralogy of our mineral deposits could limit our ability to extract these deposits, increase our extraction costs and impact the purity and suitability of extracted minerals to create products for sale and to meet customer specifications. This could adversely impact our ability to fulfill our contracts, resulting in significant contractual penalties and loss of customers.

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Our operations are conducted primarily through a limited number of key production and distribution facilities, and we are also dependent on critical equipment.

We conduct our operations through a limited number of key production and distribution facilities. These facilities include our underground salt mines, our evaporation plants, our solar evaporation ponds and facilities, certain facilities in Brazil used by our Plant Nutrition South America businesses and the distribution facilities, depots and ports owned by us and third parties. Many of our products are produced at one or two of these facilities. Any disruption of operations at one of these facilities could significantly affect production of our products, distribution of our products or our ability to fulfill our contractual obligations, which could damage our customer relationships.

For example, our two North American salt mines together constituted approximately 71% of our salt production capacity as of December 31, 2020, and supply most of the salt sold by our North American highway deicing business and significant portions of the salt sold by our consumer and industrial business. A production interruption at one of our salt mines could adversely affect our ability to fulfill our salt contracts and our ability to secure future contracts in affected markets or other markets. Our salt mines also have limited access ways and shafts and any inability to use these access ways and shafts could impede our ability to operate or cause a production interruption. In addition, we only have a limited number of distribution facilities in the markets in which we sell our salt products. Failure to have our salt products at a specific distribution facility when needed (for example during a snow event) could adversely impact our ability to fulfill our highway deicing sales contracts, resulting in significant contractual penalties and loss of customers.

Similarly, many of our plant nutrition products are only produced at one or two facilities. We primarily produce SOP at our solar evaporation ponds and facilities located adjacent to the Great Salt Lake and also produce SOP at our facility near Big Quill Lake. SOP production from these facilities could be disrupted or negatively impacted by structural damage, as a result of dike failure or other factors, which could result in reduced sales and revenue. In addition, in our Plant Nutrition South America business, we use products manufactured at certain of our production facilities as inputs to products manufactured at our other production facilities in Brazil. An interruption at one of our production facilities could result in production disruptions at other facilities in Brazil, as alternative sources for raw materials or other materials might not be available at reasonable prices, on a timely basis, or at all. A production interruption or disruption at one or more of our facilities could result in a loss of customers, a loss in revenue or subject us to fines or penalties.

Our operations depend upon critical equipment, such as continuous miners, hoists, conveyor belts, bucket elevators, loading equipment, baghouses and dryers. This equipment could be damaged or destroyed, suffer breakdowns or failures or deteriorate due to wear and tear sooner than we estimate, and we may be unable to replace or repair the equipment in a timely manner or at a reasonable cost. If these events occur, we may incur additional maintenance and capital expenditures, our operations could be materially disrupted and we may not be able to produce and ship our products.

The results of our operations are dependent on and vary due to weather conditions. Additionally, adverse weather conditions or significant changes in weather patterns could adversely affect us.

Weather conditions, including amounts, timing and duration of wintry precipitation and snow events, excessive hot or cold temperatures, rainfall and drought, can significantly impact our sales, production, costs and operational results and impact our customers. From year to year, sales of our deicing products and profitability of the Salt segment may be affected by weather conditions in our markets. Any prolonged change in weather patterns in our markets, as a result of climate change or otherwise, could have a material impact on the results of our operations.

In addition, our ability to produce SOP, salt and magnesium chloride from our solar evaporation ponds located near Ogden, Utah is dependent upon sufficient lake brine levels and hot, arid summer weather conditions. Prolonged periods of precipitation, lack of sunshine, cooler weather or increased mountain water run-off during the evaporation season could reduce mineral concentrations and evaporation rates, leading to decreases in our production levels. Similarly, drought or decreased mountain snowfall and associated fresh water run-off could change brine levels, impacting our mineral harvesting process, amount and timing. Lake level fluctuations and other factors could alter brine levels or mineral concentration levels, which may disrupt our typical two- to three-year evaporation production cycle. Similar factors could negatively impact the lake level and concentration of sulfates at the Big Quill Lake, impacting the production at our Wynyard facility. The occurrence of these events at the Great Salt Lake or Big Quill Lake could lead to decreased production levels, increased operating costs and significant additional capital expenditures.

Weather conditions have historically caused volatility in the agricultural industry (and indirectly in our results of operations) by causing crop failures or significantly reduced harvests, which can adversely affect application rates, demand for our plant nutrition products and our customers’ creditworthiness. Weather conditions can also lead to a reduction in farmable acres, flooding, drought or wild fires, which could also adversely impact growers’ crop yields and the uptake of plant nutrients, reducing the need for application of plant nutrition products for the next planting season which could result in lower demand for our plant nutrition products and impact sale prices.

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Strikes, other forms of work stoppage or slowdown and other union activities could disrupt our business and negatively impact our financial results.

Approximately 50% of our workforce in the U.S., Canada and the U.K. and approximately 30% of our global workforce is represented by collective bargaining agreements. Of our 12 collective bargaining agreements in effect on January 1, 2021, two will expire in 2021 (including one for the Goderich mine, which expires on March 31, 2021), five will expire in 2022, three will expire in 2023 and one will expire in 2027. In addition, trade union membership is mandatory in Brazil, where approximately 40% of our global workforce is located as of December 31, 2020.

Unsuccessful contract negotiations, adverse labor relations at any of our locations or other factors could result in strikes, work stoppages, work slowdowns, dissatisfied employees or other actions, which could disrupt our business and operations. These disruptions could negatively impact our business, our operations, our ability to produce or sell our products, our ability to service our customers and our ability to recruit and retain personnel, and could result in significant additional costs as well as adversely affect our reputation, financial condition and operating results. For example, we experienced a strike at our Goderich mine in 2018, which had a negative impact on our business and operations, including higher production costs, higher logistical costs and lost sales.

Our business is capital intensive, and the inability to fund necessary capital expenditures or successfully complete our capital projects could have an adverse effect on our growth and profitability.

In recent years, we have made significant expenditures on large capital projects, including a shaft relining project at our Goderich mine, implementing continuous mining at our Goderich mine and expanding our SOP processing plant at our Ogden facility. In addition, maintaining our existing facilities requires significant capital expenditures, which may fluctuate materially. We also may make significant capital expenditures in the future to expand or modify our existing operations, including projects to expand or improve our facilities or equipment and projects to improve our computer systems, information technology and operations technology. These activities or other capital improvement projects may require the temporary suspension of production at our facilities, which could have a material adverse effect on the results of our operations.

Any capital project we undertake involves risks, including cost overruns, delays and performance uncertainties, and could interrupt our ongoing operations. The expected benefits from any of our capital projects may not be realized in accordance with our projections. Our capital projects may also result in other unanticipated adverse consequences, such as the diversion of management’s attention from other operational matters or significant disruptions to our ongoing operations.

Although we currently finance most of our capital expenditures through cash provided by operations, we also may depend on increased borrowing or other financing arrangements to fund future capital expenditures. If we are unable to obtain suitable financing, we may not be able to complete future capital projects and our ability to maintain or expand our operations may be limited. The occurrence of these events could have a material adverse effect on our business, financial condition and results of operations.

Our production processes rely on the consumption of natural gas, electricity and certain other raw materials. A significant interruption in the supply or an increase in the price of any of these could adversely affect our business.

Energy costs, primarily natural gas and electricity, represent a substantial part of our total production costs. Our profitability is impacted by the price and availability of natural gas and electricity we purchase from third parties. Natural gas is a primary energy source used in the mechanically evaporated salt production process. Our contractual arrangements for the supply of natural gas have terms of up to three years, do not specify quantities and are automatically renewed unless either party elects not to do so. In addition, electricity is a primary energy source used by our Plant Nutrition South America businesses, and we have electricity contracts with terms of up to five years and generally do not automatically renew. We do not have arrangements in place with back-up suppliers. We use natural gas derivatives to hedge some of our financial exposure to the price volatility of natural gas. A significant increase in the price of energy that is not recovered through an increase in the price of our products or covered through our hedging arrangements, or an extended interruption in the supply of natural gas or electricity to our production facilities, could have a material adverse effect on our business, financial condition and results of operations.

We use KCl in our salt and plant nutrition operations. Large price fluctuations in KCl can occur without a corresponding change in the sales price of our products sold to our customers. This could change the profitability of our products that require KCl, which could materially affect the results of our operations. In certain cases, we also source raw materials from a sole supplier and cannot guarantee that any supplier will be able to meet our requirements and any changes in their operations, including prolonged outages, could have a material adverse effect on our business.

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Financial Risks

Our indebtedness and any inability to pay our indebtedness could adversely affect our business and financial condition.

We have a significant amount of indebtedness and may incur additional debt in the future. As of December 31, 2020, we had $1.41 billion of outstanding indebtedness, including $520.3 million of borrowings under our senior secured credit facilities, which are further described in Part II, Item 8, Note 10 of our Consolidated Financial Statements. We pay significant interest on our indebtedness, with variable interest on our borrowing under our senior secured credit facilities based on prevailing interest rates. Significant increases in interest rates will increase the interest we pay on our debt. Our indebtedness could:

•require us to agree to less favorable terms, including higher interest rates, in order to incur additional debt, and otherwise limit our ability to borrow additional money or sell our stock to fund our working capital, capital expenditures and debt service requirements;

•impact our ability to implement our business strategy and limit our flexibility in planning for, or reacting to, changes in our business as well as changes to economic, regulatory or other competitive conditions;

•place us at a competitive disadvantage compared to our competitors with greater financial resources;

•make us more vulnerable to a downturn in our business or the economy;

•require us to dedicate a substantial portion of our cash flow from operations to the repayment of our indebtedness, thereby reducing the availability of our cash flow for other purposes;

•restrict us from making strategic acquisitions or cause us to make non-strategic divestitures; and

•materially and adversely affect our business and financial condition if we are unable to meet our debt service requirements or obtain additional financing.

In the future, we may incur additional indebtedness or refinance our existing indebtedness. If we incur additional indebtedness or refinance, the risks that we face as a result of our leverage could increase. Financing may not be available when needed or, if available, may not be available on commercially reasonable or satisfactory terms. Any downgrades from credit rating agencies such as Moody’s or Standard & Poor’s may adversely impact our ability to obtain financing or the terms of such financing.

Our ability to make payments on our indebtedness, refinance our indebtedness and fund planned capital expenditures will depend on our ability to generate future cash flows from operations. This, to a certain extent, is subject to general economic, financial, competitive, legislative, regulatory and other factors that are beyond our control. There can be no assurance that our business will generate sufficient cash flows from operations or that future borrowings will be available to us under our revolving credit facility in an amount sufficient to enable us to make payments with respect to our indebtedness or to fund our other liquidity needs. If this were the case, we might need to refinance all or a portion of our indebtedness on or before maturity, sell assets, reduce or delay capital expenditures or seek additional equity financing. Our inability to obtain needed financing or generate sufficient cash flows from operations may require us to abandon or curtail capital projects, strategic initiatives or other investments, cause us to divest our business or impair our ability to make acquisitions, enter into joint ventures or engage in other activities, which could materially impact our business.

The agreements governing our indebtedness impose restrictions that may limit our ability to operate our business or require accelerated debt payments.

Our agreements governing our indebtedness contain covenants that limit our ability to:

•incur additional indebtedness or contingent obligations or grant liens;

•pay dividends or make distributions to our stockholders;

•repurchase or redeem our stock;

•make investments or dispose of assets;

•prepay, or amend the terms of, certain junior indebtedness;

•engage in sale and leaseback transactions;

•make changes to our organizational documents or fiscal periods;

•create or permit certain liens on our assets;

•create or permit restrictions on the ability of certain subsidiaries to make certain intercompany dividends, investments or asset transfers;

•enter into new lines of business;

•enter into transactions with our stockholders and affiliates; and

•acquire the assets of, or merge or consolidate with, other companies.

The credit agreement governing our senior secured credit facilities also requires us to maintain financial ratios, including an interest coverage ratio and a total leverage ratio, which we may be unable to maintain. As of December 31, 2020, our total leverage ratio (as calculated under the terms of our credit agreement) was 4.3x, and if our leverage ratio exceeds 4.5x as of March 31, 2021, or the last day of any quarter thereafter, we would be in default under our credit agreement.

Various risks, uncertainties and events beyond our control could affect our ability to comply with the covenants, financial tests and ratios required by the agreements governing our indebtedness. If we default under our agreements governing our

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indebtedness, our lenders could cease to make further extensions of credit, accelerate payments under our other debt instruments (including hedging instruments) that contain cross-acceleration or cross-default provisions and foreclose upon any collateral securing that debt as well as restrict our ability to make certain investments and payments, pay dividends, repurchase our stock, enter into transactions with affiliates, make acquisitions, merge and consolidate, or transfer or dispose of assets.

If our lenders were to require immediate repayment, we may need to obtain new financing to be able to repay them immediately, which may not be available or, if available, may not be available on commercially reasonable or satisfactory terms. Under these circumstances, we might not have sufficient funds or other resources to satisfy all of our obligations.

We are subject to tax liabilities which could adversely impact our profitability, cash flow and liquidity.

We are subject to income tax in the U.S., Canada, Brazil and U.K. Our effective tax rate could be adversely affected by changes in the mix of earnings in countries with differing statutory tax rates, changes in the valuation of deferred tax assets and liabilities and the discovery of new information in the course of our tax return preparation process. Our effective tax rate, tax expense and cash flows could also be adversely affected by changes in tax laws. In December 2017, the U.S. enacted the Tax Cuts and Jobs Act (the “Act,” which is commonly referred to as “U.S. tax reform”). The Act made broad and complex changes to the U.S. tax code. While significant guidance has been issued in the form of Treasury regulations and IRS Notices, it will take time for additional clarifying guidance and legislation to be issued, as well as for those items to be analyzed and their impacts determined. The Act may have a material impact on our financial results due to potential changes in the Act (including with respect to the regulations promulgated under the Act) or changes to its interpretation. See “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Investments, Liquidity and Capital Resources” and Part II, Item 8, Note 8 to our Consolidated Financial Statements for more details. We are also subject to audits in various jurisdictions and may be assessed additional taxes as a consequence of an audit.

Canadian provincial tax authorities have challenged our tax positions and assessed additional taxes on us, which are described in Part II, Item 8, Note 8 of our Consolidated Financial Statements. These tax assessments and future tax assessments could be material if the disputes are not resolved in our favor.

In the ordinary course of our business, there are many transactions and calculations that could be challenged by taxing authorities. This includes the values charged on the transfer of products between our subsidiaries. Although we believe our tax estimates and calculations are reasonable, they have been challenged by taxing authorities in the past. The final determination of any tax audits and litigation may take several years and be materially different from our historical income tax provisions and accruals in our consolidated financial statements. If additional taxes are assessed as a result of an audit, assessment or litigation, there could be a material adverse effect on our financial condition, income tax provision and net income in the affected periods as well as future profitability, cash flows and our ability to pay dividends and service our debt.

We are subject to financial assurance requirements and failure to satisfy these requirements could materially affect our business, results of our operations and our financial condition.

In connection with our dispute of tax assessments made by Canadian provincial tax authorities (described in more detail in “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Investments, Liquidity and Capital Resources” and Part II, Item 8, Note 8 of our Consolidated Financial Statements), we are required to post and maintain financial performance bonds. In addition, as part of our business operations, we are required to maintain financial surety or performance bonds with certain of our North American deicing customers and to fund reclamation and site cleanup following the ultimate closure of our mines and certain other facilities. We incur costs to maintain these financial assurance bonds and failure to satisfy these financial assurance requirements could materially affect our business, the results of our operations and our financial condition.

If our customers are unable to access credit, they may be not be able to purchase our products. In addition, we extend trade credit to certain customers and guarantee financing that certain customers use to purchase our products. The results of our operations may be adversely affected if customers default on these obligations.

Some of our customers require access to credit in order to purchase our products. A lack of available credit to customers, due to global or local economic conditions or for other reasons, could adversely affect demand for our products and the sales of our products.

We extend trade credit to our customers in the U.S. and throughout the world, in some cases for extended periods of time. In Brazil, where there are fewer third-party financing sources available to farmers, we also have several programs under which we guarantee customers’ financing from financial institutions that they use to purchase our products. If these customers are unable to repay the trade credit from us or financing from their financial institutions, the results of our operations could be adversely affected. Our customers may be unable to repay the trade credit from us or financing from their financial institutions as a result of market conditions in the agricultural sector, adverse weather conditions and increases in prices for other inputs that could increase the working capital requirements, indebtedness and other liabilities of our customers. We may not be able to limit our credit and collectability risk or avoid losses.

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We may not pay cash dividends or pay smaller cash dividends on our common stock in the future.

We have declared and paid quarterly cash dividends on our common stock consistently since becoming a public company. Any future payment and the amount of any future payment of cash dividends will depend upon our financial condition, earnings, legal requirements, restrictions in our debt agreements and other factors deemed relevant by our Board of Directors. Although our operations are conducted through our subsidiaries, none of our subsidiaries is obligated to make funds available to pay dividends on our common stock. Accordingly, our ability to pay dividends to our stockholders is dependent on the earnings and the distribution of funds from our subsidiaries. Certain agreements governing our indebtedness contain limitations on our ability to pay dividends (including regular annual dividends), as described under “—The agreements governing our indebtedness impose restrictions that may limit our ability to operate our business or require accelerated debt payments.” We cannot provide assurances that the agreements governing our current and future indebtedness will permit us to pay dividends on our common stock.

Competition, Sales and Pricing Risks

Our products face strong competition and if we fail to successfully attract and retain customers and invest in product development, capital improvements, productivity and quality improvements, sales of our products could be adversely affected.

We encounter strong competition in many areas of our business and our competitors may have significantly more financial resources than we do. Competition in our product lines is based on a number of factors, including product quality and performance, logistics (especially in salt distribution and Brazil chlor-alkali products), brand reputation, price and quality of customer service and support. Many of our customers attempt to reduce the number of vendors from which they purchase in order to increase their efficiency. Our customers demand a broad product range and we must continue to develop our expertise in order to manufacture and market these products successfully. To remain competitive, we need to invest in manufacturing, productivity, product innovation, marketing, customer service and support and our distribution networks. We may not have sufficient resources to continue to make such investments or maintain our competitive position. We may have to adjust our prices, strategy, product innovation, distribution or marketing efforts to stay competitive.

The demand for our products may be adversely affected by technological advances or the development of new or less costly competing products. For example, the development of substitutes for our plant nutrition products that can more efficiently mix with other agricultural inputs or have more efficient application methods may impact the demand for our products. Many of our products, including sodium chloride, magnesium chloride and SOP, have historically been characterized by a slow pace of technological advances. However, new production methods or sources for our products or the development of substitute or competing products could materially and adversely affect the demand and sales of our products.

Changes in competitors’ production, geographic or marketing focus could have a material impact on our business. We face global competition from new and existing competitors who have entered or may enter the markets in which we sell, particularly in our plant nutrition business. Some of our competitors may have greater financial and other resources than we do or are more diversified, making them less vulnerable to industry downturns and better positioned to pursue new expansion and development opportunities. Our competitive position could suffer if we are unable to expand our operations through investments in new or existing operations or through acquisitions, joint ventures or partnerships.

Risks associated with our international operations and sales and changes in economic and political environments could adversely affect our business and earnings.

We have significant operations in Canada, Brazil and the U.K. Our 2020 sales outside the U.S. were 44% of our total 2020 sales. Our overall success as a global business depends on our ability to operate successfully in differing economic, political and cultural conditions. Our international operations and sales are subject to numerous risks and uncertainties, including:

•economic developments including changes in currency exchange rates, inflation risks, exchange controls, tariffs, economic sanctions, other trade protection measures and import or export licensing requirements;

•difficulties and costs associated with complying with laws, treaties and regulations, including tax, labor and data privacy laws, treaties and regulations, and changes to laws, treaties and regulations;

•restrictions on our ability to own or operate subsidiaries, make investments or acquire new businesses;

•restrictions on our ability to repatriate earnings from our non-U.S. subsidiaries to the U.S. or the imposition of withholding taxes on remittances and other payments by our subsidiaries;

•political developments (including uncertainty and potential trade difficulties caused by the U.K.’s exit from the EU, commonly referred to as “Brexit”), government deadlock, political instability, political activism, terrorist activities, civil unrest and international conflicts; and

•uncertain and varying enforcement of laws and regulations and weak protection of intellectual property rights.

A significant portion of our cash flow is generated in Canadian dollars, Brazilian reais and British pounds sterling and our consolidated financial results are reported in U.S. dollars. Our reported results can significantly increase or decrease based on

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exchange rate volatility after translation of our results into U.S. dollars. Exchange rate fluctuations could also impact our ability to meet interest and principal payments on our U.S. dollar-denominated debt. In addition, we incur currency transaction risk when we enter into a purchase or a sales transaction using a currency other than the local currency of the transacting entity. We may not be able to effectively manage our currency risks. For more information, see Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Effects of Currency Fluctuations and Inflation,” and Item 7A, “Quantitative and Qualitative Disclosures About Market Risk.”

In addition, we may face more competition in periods when foreign currency exchange rates are favorable to our competitors. A relatively strong U.S. dollar increases the attractiveness of the U.S. market for some of our international competitors while decreasing the attractiveness of other markets to us. Similarly, a relatively strong Brazilian real increases the attractiveness of the Brazil market for our international competitors.

Anticipated changes in plant nutrition prices and customer application rates can have a significant effect on the demand and price for our plant nutrition products.

When customers anticipate increasing plant nutrition selling prices, they tend to accumulate inventories in advance of the expected price increase. Similarly, customers tend to delay their purchases when they anticipate future selling prices for plant nutrition products will stabilize or decrease. These customer expectations can lead to a lag in our ability to realize price increases for our products and adversely impact our sales volumes and selling prices.

Growers’ decisions to purchase plant nutrition products and the application rate for plant nutrition products depend on many factors, including expected grower income, crop prices, plant nutrition product prices, commodity prices, input prices and nutrient levels in the soil. Customers are more likely to decrease purchases and application rates when they expect declining agricultural economics or relatively high plant nutrition costs, other costs and soil nutrient levels. This variability can materially impact our prices and volumes sold.

Conditions in the sectors where we sell products and supply and demand imbalances for competing products can impact the price and demand for our products.

Conditions in the North American and Brazilian agricultural sectors can significantly impact both of our plant nutrition businesses. The North America and Brazil agricultural sector can be affected by a number of factors, including weather conditions, field conditions (particularly during periods of traditionally high plant nutrition application), government policies, tariffs and import and export markets.

Demand for our products in the agricultural sector is affected by crop prices, crop selection, planted acreage, application rates, crop yields, product acceptance, population growth, livestock consumption and changes in dietary habits, among other things. Supply is affected by available capacity, operating rates, raw material costs and availability, feasible transportation, government policies, tariffs and global trade. In addition, the demand and price of plant nutrition products can be affected by factors such as plant disease. For example, Asian soybean rust and African swine flu has in certain years affected soybean and other crops in Brazil and the U.S., reducing demand for plant nutrition products.

MOP is the least expensive form of potash fertilizer and, consequently, it is the most widely used potassium source for most crops. SOP is utilized by growers for many high-value crops, especially crops for which low-chloride content fertilizers or the presence of sulfur improves quality and yield, such as almonds and other tree nuts, avocados, citrus, lettuce, tobacco, grapes, strawberries and other berries. Lower prices or demand for these crops could adversely affect demand for our products and the results of our operations.

When the demand and price of potash are high, our competitors are more likely to increase their production and invest in increased production capacity. An over-supply of MOP or SOP domestically or worldwide could unfavorably impact the prices we can charge for our SOP, as a large price disparity between potash products could cause growers to choose MOP or other less-expensive alternatives, which could adversely impact our sales volume and the results of our operations.

Similarly, conditions in the Salt sector can significantly impact our Salt business. These conditions include weather conditions as well as import and export markets. Supply and demand imbalances can be caused by a number of factors, including weather conditions, operating rates, transportation costs and global trade.

Increasing costs or a lack of availability of transportation services could have an adverse effect on our ability to deliver products at competitive prices.

Transportation and handling costs are a significant component of our total delivered product cost, particularly for our salt products. The high relative cost of transportation favors producers whose mines or facilities are located near the customers they serve. We contract bulk shipping vessels, barges, trucking and rail services to move our products from our production facilities to distribution outlets and customers. A reduction in the dependability or availability of transportation services, a significant increase in transportation service rates, adverse weather and changes to water levels on the waterways we use could impair our ability to deliver our products economically to our customers or expand our markets. For example, when the Mississippi river floods significantly (as it did during 2019), barges may be unable to traverse the river system and we may be prevented from

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timely delivering our salt products to our customers, which could increase costs to deliver our products and adversely impact our ability to fulfill our contracts, resulting in significant contractual penalties and loss of customers.

In addition, diesel fuel is a significant component of our transportation costs. Some of our customer contracts allow for full or partial recovery of changes in diesel fuel costs through an adjustment to the selling price. However, a significant increase in the price of diesel fuel that is not passed through to our customers could materially increase our costs and adversely affect our financial results.

Significant transportation costs relative to the cost of certain of our products, including our salt products and certain products sold by our Plant Nutrition South America segment, limit our ability to increase our market share or serve new markets.

The demand for our products is seasonal.

The demand for our salt and plant nutrition products is seasonal, and the degree of seasonality can change significantly from year to year due to weather conditions, including the number of snow events, rainfall and other factors.

Our salt deicing business is seasonal. On average, in each of the last three years, approximately two-thirds of our deicing product sales occurred during the North American and European winter months of November through March. Winter weather events are not predictable, yet we must stand ready to deliver deicing products to local communities with little advance notice under the requirements of our highway deicing contracts. As a result, we attempt to stockpile our highway deicing salt throughout the year to meet estimated demand for the winter season. Failure to deliver under our highway deicing contracts may result in significant contractual penalties and loss of customers. Servicing markets typically serviced by one production facility with product from an alternative facility may add logistics and other costs and reduce profitability.

Our plant nutrition business is also seasonal. For example, the strongest demand for our plant nutrition 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).

If seasonal demand is greater than we expect, we may experience increased costs and product shortages, and our customers may turn to our competitors for products that they would otherwise have purchased from us. If seasonal demand is less than we expect, we may have excess inventory to be stored (in which case we may incur increased storage costs) or liquidated (in which case the selling price may be below our costs). If prices for our products rapidly decrease, we may be subject to inventory write-downs. Our inventories may also become impaired through obsolescence or the quality may be impaired if our inventories are not stored properly. Low seasonal demand could also lead to increased unit costs.

Legal, Regulatory and Compliance Risks

Our operations depend on our rights and governmental authorizations to mine and operate our properties.

We hold numerous environmental and mineral extraction permits, water rights and other permits, licenses and approvals from governmental authorities authorizing operations at each of our facilities. A decision by a governmental agency to revoke, substantially modify, deny or delay renewal of or apply conditions to an existing permit, license or approval could have a material adverse effect on our ability to continue operations at the affected facility and result in significant costs. For example, certain indigenous groups have challenged the Canadian government’s ownership of the land under which our Goderich mine is operated. There can be no assurances that the Canadian government’s ownership will be upheld or that our existing mining and operating permits will not be revoked or otherwise affected. In addition, although we do not engage in fracking, laws and regulations targeting fracking could lead to increased permit requirements and compliance costs for non-fracking operations, including our salt operations, which require permitted wastewater disposal wells.

Furthermore, many of our facilities are located on land leased from governmental authorities or third parties. Our leases generally require us to continue mining in order to retain the lease, the loss of which could have a material adverse effect on our ability to continue operations at the affected facility and result in significant costs. In some instances, we have received access rights or easements from third parties which allow for a more efficient operation than would exist without the access or easement. Loss of these access rights or easements could have a material adverse effect on us. In addition, many of our facilities are located near existing and proposed third-party industrial operations that could affect our ability to fully extract, or the manner in which we extract, the mineral deposits to which we have mining rights. For example, certain neighboring operations or land uses may require setbacks that could prevent us from mining portions of our mineral reserves or using certain mining methods.

Expansion of our operations or production capacity, or preservation of existing rights in some cases, is also predicated upon securing any necessary permits, licenses and approvals. For example, we may require additional permits, licenses and approvals to continue diverting water from the Great Salt Lake based on lake conditions or to further expand our production capacity at our Ogden, Utah facility. We may not be granted the necessary permits, licenses and approvals. A decision by a governmental

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agency to deny, delay issuing or apply conditions to any new permits, licenses and approvals could adversely affect our ability to operate and the results of our operations.

Compliance with import and export requirements, the FCPA and other applicable anti-corruption laws may increase the cost of doing business.

Our operations and activities inside and outside the U.S., as well as the shipment of our products across international borders, require us to comply with a number of federal, state, local and foreign laws and regulations, which are complex and increase our cost of doing business. These laws and regulations include import and export requirements, economic sanctions laws, customs laws and anti-corruption laws, such as the FCPA, the Brazilian Clean Companies Act and the U.K. Bribery Act. We cannot predict how these laws or their interpretation, administration and enforcement will change over time. There can be no assurance that our employees, contractors, agents, distributors, customers of third parties working on our behalf will not take actions in violation of these laws. Any violations of these laws could subject us to civil or criminal penalties, including fines or prohibitions on our ability to offer our products in one or more countries, debarment from government contracts (and termination of existing contracts) and could also materially damage our reputation, brand, international expansion efforts, business and operating results. In addition, changes to trade or anti-corruption laws and regulations could affect our operating practices or impose liability on us in a manner that could materially and adversely affect our business, financial condition and results of operations.

We are subject to EHS laws and regulations which could become more stringent and adversely affect our business.

Our operations are subject to an evolving set of federal, state, local and foreign EHS laws and regulations. New or proposed EHS regulatory programs, as well as future interpretations and enforcement of existing EHS laws and regulations, may require modification to our facilities, require substantial increases in equipment and operating costs, subject us to fines, penalties or lead to interruptions, modifications or a termination of operations, which could involve significant capital costs, increases in operating costs or other significant impacts.

For example, we are impacted by the Clean Air Act and other EHS laws and regulations that regulate air emissions. These regulatory programs may subject us to fines or penalties or require us to install expensive emissions abatement equipment, modify our operational practices, obtain additional permits or make other expenditures. Our Ogden facility is located in an area expected to be of continued scrutiny by the Environmental Protection Agency and Utah Air Quality Board with respect to certain air emissions and related issues under the Clean Air Act.

In addition, if new Clean Water Act regulations are adopted or increased compliance obligations are imposed on existing regulations, we could be adversely affected. For example, a significant portion of our salt products are distributed through salt depots owned and operated by third parties. If these depots are required to adopt more stringent stormwater management practices or are subject to increased compliance requirements under existing Clean Water Act regulations, these depots may pass on any increased costs to us, exit the depot business (requiring us to find new depot partners or establish Company-owned depots) or otherwise cause an adverse impact to our ability to deliver salt to our customers. Additionally, governmental agencies could restrict the use of road salt for highway deicing purposes or adopt laws and regulations to address climate change and greenhouse gases, which could have a material impact on us. See “Business—Environmental, Health and Safety and Other Regulatory Matters” for more information about EHS laws and regulations affecting us and their potential impact on us.

We could incur significant environmental liabilities with respect to our current, future or former facilities, adjacent or nearby third-party facilities or off-site disposal locations.

Risks of environmental liabilities is inherent in our current and former operations. At many of our past and present facilities, releases and disposals of regulated substances have occurred and could occur in the future, which could require us to investigate, undertake or pay for remediation activities under CERCLA and other similar EHS laws and regulations. The use, handling, disposal and remediation of hazardous substances currently or formerly used by us, or the liabilities arising from past releases of, or exposure to, hazardous substances may result in future expenditures that could materially and adversely affect our financial results, cash flows or financial condition. Our facilities are also subject to laws and regulations which require us to monitor and detect potential environmental hazards and damages. Our procedures and controls may not be sufficient to timely identify and protect against potential environmental damages and related costs.

We record accruals for contingent environmental liabilities when we believe it is probable that we will be responsible, in whole or in part, for environmental investigation or remediation activities and the expenditures for these activities are reasonably estimable. For example, we have ongoing investigation and remediation activities at our property located in Kenosha, Wisconsin, which are described in Part II, Item 8, Note 12 of our Consolidated Financial Statements. However, the extent and costs of any environmental investigation or remediation activities are inherently uncertain and difficult to estimate and could exceed our expectations, which could materially affect our financial condition and operating results.

Additionally, we previously sold a portion of our U.K. salt mine to a third party, which operates a waste management business. The third party’s business, under governmental permits, is allowed to securely dispose certain hazardous waste at the

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property they own and they pay us fees for engaging in this activity. We also operate a mercury cell facility at our Igarassu facility. We could incur future expenditures to address risks related to this hazardous waste disposal and mercury use or to remediate any contamination. See “Business—Environmental, Health and Safety and Other Regulatory Matters” for more information.

Our intellectual property may be misappropriated or subject to claims of infringement.

Intellectual property rights, including patents, trademarks, and trade secrets, are a valuable aspect of our business. We attempt to protect our intellectual property rights primarily through a combination of patent, trademark, and trade secret protection. The patent rights that we obtain may not provide meaningful protection to prevent others from selling competitive products or using similar production processes. Pending patent applications may not result in an issued patent. If we do receive an issued patent, we cannot guarantee that our patent rights will not be challenged, invalidated, circumvented, or rendered unenforceable.

We also rely on trade secret protection to guard confidential unpatented technology, manufacturing expertise, and technological innovation. Although we generally enter into confidentiality agreements with our employees, third-party consultants and advisors to protect our trade secrets, we cannot guarantee that these agreements provide meaningful protection or that adequate remedies will be available in the event of an unauthorized use or disclosure of our trade secrets.

Our brand names and the goodwill associated therewith are an important part of our business. We seek to register our brand names as trademarks where it makes business sense. Our trademark registrations may not prevent our competitors from using similar brand names. Many of our brand names are registered as trademarks in the U.S. and foreign countries. The laws in certain foreign countries in which we do business do not protect trademark rights to the same extent as U.S. law. As a result, these factors could weaken our competitive advantage with respect to our products, services and brands in foreign jurisdictions, which could adversely affect our financial performance.

Our intellectual property rights may not be upheld if challenged. Such claims, if proven, could materially and adversely affect our business and may lead to the impairment of the amounts recorded for goodwill and other intangible assets. If we are unable to maintain the proprietary nature of our technologies, we may lose any competitive advantage provided by our intellectual property. In addition, although any such claims may ultimately prove to be without merit, the necessary management attention to and legal costs associated with defending our intellectual property rights could be significant.

We may face significant product liability claims and product recalls, which could harm our business and reputation.

We face exposure to product liability and other claims if our products cause harm, are alleged to have caused harm or have the potential to cause harm to consumers. In addition, our products or products manufactured by our customers using our products could be subject to a product recall as a result of product contamination, our failure to meet product specifications or other causes. For example, our customers use our food-grade salt products in food items they produce, such as cheese and bread, which could be subject to a product recall if our products are contaminated or adulterated. Similarly, the use and application of our animal feed and plant nutrition products could result in a product recall if it were alleged that they were contaminated. Additionally, our production and sale of water treatment chemicals and other chemical solutions products could result in contaminants entering waterways and the public water system, leading to significant liabilities and costs.

A product recall could result in significant losses due to the costs of a recall, the destruction of product inventory and production delays to identify the underlying cause of the recall. We could be held liable for costs related to our customers’ product recall if our products cause the recall or other product liability claims if our products cause harm to our customers. Additionally, a significant product liability case, product recall or failure to meet product specifications could result in adverse publicity, harm to our brand and reputation and significant costs, which could have a material adverse effect on our business and financial performance.

We may be negatively impacted if we are unable to obtain required product registrations or if we face increased regulatory requirements.

Globally, there are directives, laws and regulations that require registration of our products before they can be sold, impose labelling requirements and require our products to be manufactured to certain specifications. Each country, state and province appoints regulatory agencies responsible for these requirements, and many of our products must be registered with these regulatory agencies. A decision to deny the registration of a new product or to delay, revoke or modify an existing product registration may have a material adverse effect on us and could impede our ability to implement our business strategies. In addition, regulatory and labeling requirements could increase, which could require increased expenditures. For example, many regulatory agencies continue to evaluate potential health and environmental impacts that could arise from the handling and use of new and existing plant nutrition products. These evaluations or other developments could result in additional regulatory requirements for plant nutrition producers, including us, or for our customers, and could negatively impact the demand for our products.

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We are subject to costs and risk associated with a complex regulatory, compliance and legal environment, and we may be adversely affected by changes in laws, industry standards and regulatory requirements.

Our global business is subject to complex requirements of federal, state, local and foreign laws, regulations and regulatory authorities as well as industry standard-setting authorities. Changes in the standards and requirements imposed by these laws, regulations and authorities or adoption of any new laws or regulations could negatively affect our ability to serve our customers or our business. In the event that we are unable to meet any new or modified standards when adopted, our business could be adversely affected. Some of the federal, state, local and foreign laws and regulations that affect us include those relating to EHS matters; taxes; antitrust and anti-competition laws; data protection and privacy; advertisement and marketing; labor and employment; import, export and anti-corruption; product liability; product registrations; and intellectual property

For example, if significant import duties were imposed on the salt we import into the U.S. from our Goderich mine, or if we were unable to include the transfer price of such salt in the cost of goods sold for tax purposes, our financial condition and operating results would be materially and adversely affected. We could also be adversely impacted by changes in tariffs imposed by countries or other trade protection measures, which could decrease our sales in markets where we sell our products. In addition, failure to comply with applicable laws and regulations or to comply with any of contracts we have with governmental entities could preclude us from conducting business with governmental entities and lead to penalties, injunctions, civil remedies or fines.

COVID-19, Strategic and Other Business Risks

The COVID-19 pandemic, or other outbreaks of infectious disease or similar public health threats, could materially and adversely affect our business, financial condition and results of operations.

The ongoing COVID-19 pandemic, and any other outbreaks of contagious diseases or other adverse public health developments in the U.S. or worldwide, could have a material adverse effect on our business, financial condition and results of operations. As an essential business, we have continued producing and delivering products that support critical industries such as transportation, agriculture, chemical, food, pharmaceutical and animal nutrition. However, COVID-19 has significantly impacted economic activity and markets worldwide, and it has and may continue to negatively affect our business in a number of ways. These effects include, but are not limited to:

•Disruptions or restrictions on our employees’ ability to work effectively due to illness, travel bans, quarantines, shelter-in-place orders or other limitations could impact our business.

•Temporary closures or disruptions at our facilities or the facilities of our customers or suppliers could reduce demand for our products or affect our ability to timely meet our customer’s orders and negatively impact our supply chain. For example, we experienced lost sales in 2020 primarily for certain customers of our non-deicing salt products due to manufacturing outages and retail disruptions related to COVID-19. Compliance with new governmental regulations could increase our operational costs. COVID-19 has not interrupted the operations of our mining and manufacturing operations in North America and Brazil; however, operations at our U.K. salt mine were idled near the end of March 2020 through mid-May 2020 due to the mild 2019-2020 winter weather experienced in that market, along with U.K. government guidance on COVID-19 preventative measures. In addition, we have incurred increased costs and disruptions related to health and safety precautions we have put in place at our facilities, such as increased sanitation of offices and common areas, additional personal protective equipment requirements, staggered shift schedules and pre-shift screenings.

•A COVID -19 outbreak at one or more of our facilities could result in a regulatory agency mandated closure or shut down until the outbreak is controlled and the regulatory authority allows the facility to reopen.

•Our mining and manufacturing facilities rely on raw materials and components provided by our suppliers. The impacts of COVID-19 could cause delays or disruptions in our supply chain and we could experience a mining or manufacturing slow-down or seek to obtain alternate sources of supply, which may not be available or may be more expensive. Disruptions to our supply chain and business operations, or to our suppliers’ or customers’ supply chains and business operations, could include disruptions from the closure of supplier and manufacturer facilities, interruptions in the supply of raw materials and components, personnel absences, or restrictions on the shipment of our or our suppliers’ or customers’ products, any of which could have adverse ripple effects on our business.

•Global health concerns, such as COVID-19, have resulted in and may continue to result in social, economic and labor instability in the countries and localities in which we or our suppliers and customers operate. Any of these uncertainties could have a material adverse effect on our business, financial condition or results of operations.

•The failure of third parties on which we rely, including our suppliers, customers, contractors, commercial banks, transportation service providers and external business partners, to meet their respective obligations to us, or significant disruptions in their ability to do so, which may be caused by their own financial or operational difficulties, could have an adverse impact on our business, financial condition or results of operations.

•Remote work arrangements for our employees could strain our technology resources and introduce operational risks, including heightened cybersecurity risk. Remote working environments may be less secure and more susceptible to

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hacking attacks, including phishing and other social engineering attempts that seek to exploit the COVID-19 pandemic. These risks could also impact the third parties on which we rely.

•The COVID-19 pandemic has significantly increased economic and demand uncertainty and has led to disruption and volatility in the global credit and financial markets, which increases the cost of capital and adversely impacts access to capital for both us and our customers and suppliers. Disruption and volatility in the global and financial markets or other factors may also cause adverse fluctuations in foreign currency exchange rates, particularly an increase in the value of the U.S. dollar against the Canadian dollar, the Brazilian real or the U.K. pound sterling, which could negatively affect our business, financial condition and reported results of operations.

The impact of COVID-19 may also exacerbate other risks discussed elsewhere in this section of this report, any of which could have a material adverse effect on us. The extent to which the COVID-19 pandemic, or other outbreaks of disease or similar public health threats, materially and adversely impact our business, financial condition and results of operations is highly uncertain and will depend on future developments. Such developments may include the geographic spread and duration of the virus, the severity of the disease and the actions that may be taken by various governmental authorities and other third parties in response to the outbreak. In addition, how quickly, and to what extent, normal economic and operating conditions can resume cannot be predicted, and the resumption of normal business operations may be delayed or constrained by lingering effects on our suppliers, third-party service providers and customers. There is also no certainty about when the adverse impacts of the COVID-19 pandemic will end.

We may not successfully implement our strategies.

Our success depends, to a significant extent, on successful implementation of our business strategies, including our strategic priorities, our cost savings initiatives, our enterprise optimization initiatives and any other strategies described in the “Business” section of this report. We cannot assure that we will be able to successfully implement our strategies or, if successfully implemented, we may not realize the expected benefits of our strategies.

Although we make substantial investments in product innovation, we cannot be certain that we will be able to develop, obtain or successfully implement new products or technologies on a timely basis or that they will be well-received by our customers. Moreover, our investments in new products and technologies involve certain risks and uncertainties and could disrupt our ongoing business. New investments may not generate sufficient revenue, may incur unanticipated liabilities and may divert our limited resources and distract management from our current operations. We cannot be certain that our ongoing investments in new products and technologies will be successful, will meet our expectations and will not adversely affect our reputation, financial condition and operating results.

On February 16, 2021, we announced our plans to separate our South America assets into two businesses, chemicals and specialty plant nutrition, with the intention of enabling a targeted and efficient sales process to unlock maximum value for each set of assets. We cannot predict the timing or outcome of the sale processes for our South America businesses. We may not be successful in identifying a purchaser or purchasers or in obtaining an offer at an acceptable price and/or on acceptable terms and conditions. In addition, the strategic evaluation and potential sales may be time consuming and disruptive to our business operations, we may incur substantial expenses in connection with the evaluation and, if we are unable to effectively manage the process, our business, financial condition and results of operations could be adversely affected. We also cannot assure that any potential transaction or other strategic alternative, if identified, evaluated and consummated, will provide greater value to our stockholders than that reflected in our current stock price. Any potential transaction or other strategic alternative would be dependent upon a number of factors that may be beyond our control, including, among other factors, market conditions, industry trends, the interest of third parties in our South America businesses and the availability of financing to potential buyers on reasonable terms.

Our business is dependent upon highly skilled personnel, and the loss of key personnel may have a material adverse effect on our performance.

Our business is dependent on our ability to attract, develop and retain highly skilled personnel. We may not be able to attract, develop and retain the personnel necessary for the efficient operation of our business, and our inability to do so could result in decreased productivity and efficiency, higher costs, the use of less-qualified personnel and reputational harm, which may have a material adverse effect on our performance.

To help attract, retain and motivate qualified personnel, we use stock-based incentive awards such as employee stock options, restricted stock units and performance stock units. If the value of these stock awards does not appreciate as measured by our common stock price, performance conditions in these awards are not met or if our stock-based compensation otherwise ceases to be viewed as a valuable benefit, our ability to attract, retain and motivate personnel could be weakened, which could harm our business.

The loss of certain key employees could damage critical customer relationships, result in the loss of vital institutional knowledge, experience and expertise, and impact our ability to successfully operate our business and execute our business strategy. We may not be able to find qualified replacements for these key positions and the integration of replacements may be disruptive to our business. In addition, the loss of our key employees who have in-depth knowledge of our research and

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development, mining, manufacturing or engineering processes could lead to increased competition to the extent that those employees are hired by a competitor and are able to recreate our processes or share our confidential information.

If our computer systems, information technology or operations technology are compromised, our ability to conduct our business will be adversely impacted.

We rely on computer systems, information technology and operations technology to conduct our business, including cash management, order entry, invoicing, plant operations, vendor payments, employee salaries and recordkeeping, inventory and asset management, shipping of products, and communication with employees and customers. We also use our systems to analyze and communicate our operating results and other data to internal and external recipients. We continue to make updates and improvements to our enterprise resource planning system, network and other core applications, which could impact substantially all of our key processes. Any implementation issues could have adverse effects on our ability to properly capture, process and report financial transactions, distribute our products, invoice and collect from our customers and pay our vendors and could lead to increased expenditures or operational disruptions.

We are susceptible to cyber-attacks, computer viruses and other technological disruptions, which generally continue to increase due to evolving threats and our expanding information technology footprint. We have experienced attempts by unauthorized agents to gain access to our computer systems through the internet, e-mail and other access points. To date, none have resulted in any material adverse impact to our business or operations. While we have programs, policies and procedures in place to identify, prevent and detect any unauthorized access, this does not guarantee that we will be able to detect or prevent unauthorized access to our computer systems. A material failure or interruption of access to our computer systems for an extended period of time or the loss of confidential or proprietary data could adversely affect our operations, reputation and regulatory compliance. While we have mitigation and data recovery plans in place, it is possible that significant expenditures, capital investments and time may be required to correct any of these issues. Additional capital investment and expenditures needed to address, prevent, correct or respond to any of these issues may negatively impact our business, financial condition and results of operations.

We may not be able to expand our business through acquisitions, and acquisitions may not perform as expected. We may not successfully integrate acquired businesses and anticipated benefits may not be realized.

Our business strategy includes supplementing organic growth with acquisitions of complementary businesses. We may not have acquisition opportunities because we may not identify suitable businesses to acquire, we compete with other potential buyers, we may not have or be able to obtain suitable financing for an acquisition and we may be hindered by competition and regulatory laws. If we cannot make acquisitions, our business growth may be limited.

Acquisitions of new businesses may not perform as expected, may not positively impact our financial performance and could increase our debt obligations. Acquisitions involve significant risks and uncertainties, including diversion of management attention, greater than expected liabilities and expenses, inadequate return of capital and unidentified issues not discovered in our due diligence.

The success of any acquisition will also depend on our ability to successfully combine and integrate the acquired business. We may fail to integrate acquired businesses in a timely and efficient manner. The integration process could result in the loss of key employees, higher than expected costs, ongoing diversion of management attention from other strategic opportunities or operational matters, the disruption of our ongoing businesses or increased risk that our internal controls are found to be ineffective.

Climate change and related laws and regulations could adversely affect us.

The potential impact of climate change on our operations, product demand and the needs of our customers remains uncertain. Scientists have proposed that the impacts of climate change could include changes in rainfall patterns, water shortages, changing sea levels, changing storm patterns and intensities and changing temperature levels. These changes could be severe and vary by geographic location. These changes could negatively impact customer demand for our products and our costs and ability to produce our products. For example, prolonged period of mild winter weather could reduce the market for deicing products. Drought conditions could similarly impact demand for our plant nutrition products. Climate change could also lead to disruptions in production or the distribution of our products due to major storm events or prolonged adverse conditions, changing temperature levels or flooding from sea level changes. In addition, governmental initiatives to address climate change or greenhouse gas emissions (including carbon or emissions taxes) and future initiatives could, if adopted, restrict our operations, require us to make capital expenditures to be compliant with these initiatives, increase our costs, impact our ability to compete or negatively impact efforts to obtain permits, licenses and other approvals for existing and new facilities. Our inability to timely respond to the risks posed by climate change and the costs of compliance with climate change laws and regulations could have a material impact on us.

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ITEM 1B.    UNRESOLVED STAFF COMMENTS

None.

ITEM 2.    PROPERTIES

Information regarding our plants and properties is included in the “Business” section of this report.

ITEM 3.    LEGAL PROCEEDINGS

We are involved in the legal proceedings described in Part II, Item 8, Note 8 and Part II, Item 8, Note 12 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.

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 report.

Information about our Executive Officers

Below is information about each person who was or is an executive officer as of December 31, 2020, and as of the date of the filing of this report. The table sets forth each person’s name, position and age as of the date of the filing of this report.

Name	Age	Position
Kevin S. Crutchfield	59	President and Chief Executive Officer and Director
James D. Standen	45	Chief Financial Officer
Mary L. Frontczak	54	Chief Legal and Administrative Officer and Corporate Secretary
S. Bradley Griffith	53	Chief Commercial Officer
George J. Schuller	57	Chief Operations Officer

Kevin S. Crutchfield, President and Chief Executive Officer and Director, joined Compass Minerals and assumed his current position in May 2019. Mr. Crutchfield also serves as member of our Board of Directors. Prior to joining Compass Minerals, Mr. Crutchfield served as CEO and member of the board of directors of Alpha Metallurgical Resources, Inc. (f/k/a Contura Energy, Inc.), a publicly traded, leading coal supplier, since the company’s inception in 2016. Previously, he served as CEO from 2009 to 2016 and chairman from 2012 to 2016 of Alpha Natural Resources, Inc., a coal producer. From 2003 to 2009, he held roles of increasing responsibility at Alpha Natural Resources. Prior to Alpha Natural Resources, Mr. Crutchfield spent over 15 years working at El Paso Corporation, a natural gas and energy provider, as well as other coal and gas producers. He also previously served on the Board of Directors of Couer Mining Inc.

James D. Standen, Chief Financial Officer, joined Compass Minerals in April 2006 and assumed his current position in August 2017. Prior to this position, Mr. Standen served as the Company’s Interim Chief Financial Officer and Treasurer starting in April 2017. He also served as the Company’s Vice President, Finance and Treasurer from October 2016 to April 2017, as Treasurer from July 2011 to October 2016 and as Assistant Treasurer from April 2006 to June 2011. Prior to joining the Company, Mr. Standen spent six years at Kansas City Southern in various finance roles after spending two years with the public accounting firm Mayer Hoffman McCann P.C.

Mary L. Frontczak, Chief Legal and Administrative Officer and Corporate Secretary, joined Compass Minerals in November 2019 and assumed her current position in February 2020. Prior to her current role, she served as the Company’s Chief Legal Officer and Corporate Secretary. Before joining Compass Minerals, Ms. Frontczak had served as Senior Vice President and General Counsel of POET LLC, an ethanol and other biorefined products producer, since 2017. Prior to POET, she headed the legal department at Bunge North America, an agribusiness and food ingredient company, from 2015 to 2017 and held roles of increasing responsibility at Peabody Energy Corporation, the world’s largest private sector coal company, from

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2005 to 2015 and The May Department Store Company from 1996 to 2005. Her experience also includes five years in private practice.

S. Bradley Griffith, Chief Commercial Officer, joined Compass Minerals in August 2016 and assumed his current position in July 2019. Prior to this position, Mr. Griffith served as the Company’s Senior Vice President, Plant Nutrition from August 2016 to July 2019. Before joining Compass Minerals, Mr. Griffith spent eight years working at Monsanto Company, a global provider of agricultural products. While at Monsanto, he held various positions, including Vice President, Global Strategic Accounts, Vice President, Global Microbials and Vice President, Western Business Unit (USA Row Crops). Prior to Monsanto, Mr. Griffith held a number of pharmaceutical and medical sales roles, most recently at Sanofi.

George J. Schuller, Chief Operations Officer, joined Compass Minerals and assumed his current position in September 2019. Prior to joining the Company, Mr. Schuller spent more than three decades working at Peabody Energy Corporation, the world’s largest private sector coal company. While at Peabody Energy, he served both surface and underground mining operations in the United States and Australia, most recently serving as President-Australia from 2017 to 2019 and Chief Operating Officer-Australia from 2013 to 2017. Prior to those positions, Mr. Schuller served in roles of increasing responsibility at Peabody Energy, gaining experience in continuous improvement and technical services in the areas of health, safety, operations, sales and marketing, product delivery and support functions.

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PART II

ITEM 5.    MARKET FOR THE REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

COMMON STOCK DATA

Our common stock, $0.01 par value, trades on the New York Stock Exchange under the symbol CMP.

HOLDERS

On February 23, 2021, the number of holders of record of our common stock was 184.

DIVIDEND POLICY

We intend to pay quarterly cash dividends on our common stock. The declaration and payment of future dividends to holders of our common stock will be at the discretion of our Board of Directors and will depend upon many factors, including our financial condition, earnings, legal requirements, restrictions in our debt agreements and other factors our Board of Directors deems relevant.

EQUITY COMPENSATION PLAN INFORMATION

The following table sets forth information at December 31, 2020, concerning our common stock authorized for issuance under our equity compensation plans:

Plan Category	Number of shares to be issued upon exercise of outstanding securities	Weighted-average exercise price of outstanding securities		Number of securities available for issuance under plan
Equity compensation plans approved by stockholders:
Stock options	868,772	$	63.06
Restricted stock units	207,982	N/A
Performance stock units	241,794	N/A
Deferred stock units	158,880	N/A
Total securities under approved plans(a)	1,477,428			2,818,263
Equity compensation plans not approved by stockholders(b):
Deferred stock units	16,792	N/A
Total	1,494,220			2,818,263

(a)In May 2020, stockholders approved the 2020 Incentive Award Plan. No new awards will be made under the 2005 Incentive Award Plan or the 2015 Incentive Award Plan subsequent to the approval of the 2020 Incentive Award Plan.

(b)Prior to 2008, non-employee directors were issued common stock and deferred stock units in connection with their service as a director under the 2004 Directors Deferred Share Plan. In 2008, we began issuing non-employee director shares of common stock and deferred stock units under equity plans approved by stockholders. No new awards will be granted under the 2004 Directors Deferred Share Plan.

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ITEM 6.    SELECTED FINANCIAL DATA

The information included in the following table should be read in conjunction with “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and the Consolidated Financial Statements and accompanying Notes thereto included elsewhere in this report.

	For the Year Ended December 31,
(Dollars in millions, except share data)	2020		2019		2018		2017		2016
Statement of Operations Data:
Sales	$	1,373.5	$	1,490.5	$	1,493.6	$	1,364.4	$	1,138.0
Shipping and handling cost(a)	266.6		312.5		320.0		267.5		244.9
Product cost(a)	794.6		841.2		879.7		770.3		593.6
Depreciation, depletion and amortization(b)	137.9		137.9		136.9		122.2		90.3
Selling, general and administrative expenses(a)	171.8		173.2		163.6		167.4		124.9
Operating earnings(a)	140.5		163.6		130.3		159.2		174.6
Interest expense	71.2		68.4		62.5		52.9		34.1
Net earnings from continuing operations(a)	59.5		62.5		68.8		42.7		162.7
Net earnings available for common stock(a)	58.2		61.4		68.3		42.2		161.9
Share Data:
Weighted-average common shares outstanding (in thousands):
Basic	33,928		33,882		33,848		33,819		33,776
Diluted	33,928		33,882		33,848		33,820		33,780
Net earnings from continuing operations per share:
Basic	$	1.72	$	1.82	$	2.02	$	1.25	$	4.79
Diluted	1.72		1.81		2.02		1.25		4.79
Cash dividends declared per share	2.88		2.88		2.88		2.88		2.78
Balance Sheet Data (at year end):
Total cash and cash equivalents	$	21.0	$	34.7	$	27.0	$	36.6	$	77.4
Total assets(c)	2,262.4		2,443.2		2,367.9		2,571.0		2,466.5
Total debt(c)	1,401.4		1,416.0		1,364.7		1,362.5		1,325.0

(a)In the fourth quarter of 2020, we released an $11.0 million domestic tax reserve due to statute expiration. In 2019, we incurred $2.8 million of additional logistics costs related to Mississippi River flooding and $2.3 million of severance and other costs related to executive transition. In 2018, we incurred costs of $5.1 million related to the transition of our Chief Executive Officer. Also in 2018, we recorded a tax benefit of $3.0 million related to the U.S. Tax Cuts and Jobs Act, the release of $7.2 million of valuation allowances related to our Plant Nutrition South America segment and incurred $3.4 million of tax expense related to the repatriation of approximately $150 million. In the fourth quarter of 2017, we recorded a net charge of $46.8 million in connection with the U.S. Tax Cuts and Jobs Act and $13.8 million related to a tax settlement with the U.S. and Canadian tax authorities. In addition, we released approximately $25 million of valuation allowances related to our Plant Nutrition South America segment deferred tax assets (see Item 8, Note 8 to our Consolidated Financial Statements for further discussion regarding these items) and incurred $4.3 million of restructuring charges. In the fourth quarter of 2016, we recognized a gain of $59.3 million related to the remeasurement of our previously held equity investment in Compass Minerals South America upon the acquisition of the remaining outstanding shares.

(b)Depreciation, depletion and amortization include amounts also included in product cost and in selling, general and administrative expenses.

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ITEM 7.    MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The statements in this discussion regarding the industry outlook, our expectations for the future performance of our business, and the other non-historical statements in this discussion are forward-looking statements. These forward-looking statements are subject to numerous risks and uncertainties, including, but not limited to, the risks and uncertainties described in Item 1A, “Risk Factors.” You should read the following discussion together with Item 1A, “Risk Factors” and the Consolidated Financial Statements and Notes thereto included elsewhere in this report.

COMPANY OVERVIEW

Compass Minerals is a leading provider of essential minerals focused on safely delivering where and when it matters to help solve nature’s challenges for customers and communities. Our salt products help keep roadways safe during winter weather and are used in numerous other consumer, industrial and agricultural applications. Our plant nutrition business manufactures an innovative and diverse portfolio of products that improve the quality and yield of crops, while supporting sustainable agriculture. Additionally, our specialty chemical business serves the water treatment industry and other industrial processes. As of December 31, 2020, we operate 21 production and packaging facilities with more than 3,000 personnel throughout the U.S., Canada, Brazil and the U.K, 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 near Ogden, Utah, which is both the largest SOP specialty fertilizer production site and the largest solar salt production site in the Western Hemisphere;

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

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

Our Salt segment 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 businesses produce and market 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 premium micronutrient products under our Wolf Trax and other brands.

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.

We focus on building intrinsic value by growing our earnings before interest, taxes, depreciation and amortization (“EBITDA”) and by improving our asset quality. We can employ our operating cash flow and other sources of liquidity to pay dividends, re-invest in our business, pay down debt and make acquisitions.

COVID-19 Pandemic

The ongoing COVID-19 pandemic has negatively impacted the global economy, disrupted global supply chains and created significant volatility and disruption of financial markets. As an essential business, we have continued producing and delivering products that support critical industries such as transportation, agriculture, chemical, food, pharmaceutical and animal nutrition. However, we have instituted several measures in response to the COVID-19 pandemic and the COVID-19 pandemic has negatively affected our business in a number of ways.

•Employee welfare: Our management team has taken multiple actions to limit the exposure of employees to the spread of COVID-19, including instituting remote working where possible, adjusting shift schedules and crew sizes, restricting visitation to operational sites, curtailing all business-related commercial air travel, and increasing sanitation of offices and common areas within our facilities.

•Operations and sales: The COVID-19 pandemic has not interrupted the operations of our mining and manufacturing facilities in North America and Brazil. Operations at our U.K. salt mine were idled near the end of March 2020 through mid-May 2020 due to the very mild winter weather experienced in that market, along with U.K. government guidance on COVID-19 preventative measures. During 2020, we also experienced an impact to some of our sales channels due to manufacturing outages and retail disruptions related to COVID-19, primarily for our non-deicing salt products. In total, we estimate that the combined impact of lost sales and incremental operating costs related to the COVID-19 pandemic totaled approximately $10 million on a year-to-date basis.

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•Supply chain and logistics: To date, we have experienced no material supply chain or logistics issues related to COVID-19. We continue to evaluate potential supply chain and logistics impacts, proactively increase inventory levels of critical sourced inputs and identify secondary suppliers where possible. Both our operations and our logistics partners are deemed “essential” under current governmental guidance, and we have worked to ensure we understand and comply with their safety precautions to limit potential disruptions.

The ultimate impact that COVID-19 will have on our future results is unknown at this time. For more information, see “Part I, Item 1A, Risk Factors.”

Consolidated Results of Operations

* Refer to “—Reconciliation of Net Earnings to EBITDA and Adjusted EBITDA” for a reconciliation to the most directly comparable GAAP financial measure and the reasons we use this non-GAAP measure.

CONSOLIDATED RESULTS COMMENTARY: 2019 – 2020

•Total sales decreased $117.0 million, due to a decrease in the Salt and Plant Nutrition South America segments, partially offset by an increase in the Plant Nutrition North America segment.

•Operating earnings decreased 14%, or $23.1 million, due to lower operating earnings in our Salt and Plant Nutrition North America segments and higher corporate expenses.

•Diluted earnings per share decreased 5%, or $0.09.

•EBITDA* adjusted for items management believes are not indicative of our ongoing operating performance (“Adjusted EBITDA”)* decreased 8%, or $24.4 million.

CONSOLIDATED RESULTS COMMENTARY: 2018 – 2019

•Total sales decreased $3.1 million, due to a decrease in both plant nutrition businesses, partially offset by an increase in the Salt segment.

•Operating earnings increased 26%, or $33.3 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.

•Diluted earnings per share decreased 10%, or $0.21.

•Adjusted EBITDA* increased 12%, or $32.5 million.

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GROSS PROFIT & GROSS MARGIN COMMENTARY: 2019 – 2020

Gross Profit: Decreased 7%, or $24.5 million; Gross Margin was 23% in both periods

•Salt segment gross profit decreased $8.8 million primarily due to lower sales volumes, which were partially offset by higher average sales prices and lower logistics costs (see “—Operating Segment Performance—Salt” for additional information).

•Gross profit for the plant nutrition businesses, on a combined basis, decreased $16.5 million. Plant Nutrition North America segment gross profit decreased $13.3 million primarily due to lower average sales prices and higher product costs including an inventory adjustment of $7.4 million related to an overstatement of bulk SOP stockpiles, feedstock inconsistency and unplanned downtime at our Ogden facility, partially offset by higher sales volumes. Plant Nutrition South America segment gross profit decreased $3.2 million primarily due to a weaker Brazilian real compared to the U.S. dollar, which was partially offset by higher agricultural product sales volumes.

GROSS PROFIT & GROSS MARGIN COMMENTARY: 2018 – 2019

Gross Profit: Increased 15%, or $42.9 million; Gross Margin increased 3 percentage points to 23% from 20%

•Salt segment gross profit increased $54.0 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 $10.7 million. Plant Nutrition North America segment gross profit decreased $1.8 million primarily due to lower sales volumes and higher per-unit shipping and handling costs due to an unfavorable geographic sales mix, partially offset by improved per-unit product costs. Plant Nutrition South America segment gross profit decreased $8.9 million primarily due to higher raw material costs, lower chemical solutions product prices and a weaker Brazilian real compared to the U.S. dollar.

OTHER EXPENSES AND INCOME COMMENTARY: 2019 – 2020

SG&A: Decreased $1.4 million; Increased 0.9 percentage points as a percentage of sales to 12.5% from 11.6%

•The reduction in SG&A expense was primarily due to lower travel expenses due to COVID-19, which was partially offset by higher corporate incentive compensation and higher corporate depreciation expense.

Interest Expense: Increased $2.8 million to $71.2 million

•The increase was primarily due to an increase in interest rates due to the refinancing of our debt in the fourth quarter of

2019, which was partially offset by lower debt levels.

Net Earnings in Equity Investee: Increased from $0.7 million to $1.4 million

•Net earnings in our equity investee increased by $0.7 million to $1.4 million due to higher sales volumes.

(Gain) loss on Foreign Exchange: Improved $13.4 million from a loss of $13.0 million in 2019 to a gain of $0.4 in 2020

•The improvement of $13.4 million was due primarily to changes in foreign currency exchange rates on our non U.S. dollar denominated intercompany loans between our U.S. and foreign subsidiaries.

Other Income, Net: decreased $1.6 million from income of $1.7 million to income of $0.1 million

•The decrease in other income, net is primarily due to fees related to our U.S. securitization facility and lower interest income in 2020.

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Income Tax Expense: Decreased $10.4 million to $11.7 million

•Income tax expense and our income tax rate decreased in 2020 due to the release of domestic tax reserves in 2020.

•Our effective tax rate decreased from 26% in 2019 to 16% in 2020. Our effective tax rate in 2020 was impacted by the release of domestic tax reserves due to statute expirations.

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

OTHER EXPENSES AND INCOME COMMENTARY: 2018 – 2019

SG&A: Increased $9.6 million; Increased 0.6 percentage points as a percentage of sales to 11.6% from 11.0%

•The increase in SG&A expense was primarily due to higher employee-related costs to bolster operational and mining expertise in our Salt and Plant Nutrition North America segments, corporate incentive compensation and higher corporate professional services expense.

Interest Expense: Increased $5.9 million to $68.4 million

•The increase was primarily due to an increase in average outstanding borrowings under our revolving credit facility and higher interest rates on our term loans.

Net Earnings in Equity Investee: Decreased from $1.0 million to $0.7 million

•Net earnings in our equity investee decreased by $0.3 million to $0.7 million.

(Gain) loss on Foreign Exchange: Decreased from gain of $5.8 million to loss of $13.0 million

•The change resulted from differences in foreign exchange rates on our non U.S. dollar denominated intercompany loans between our U.S. and foreign subsidiaries.

Other Income, Net: decreased $1.3 million from income of $3.0 million to income of $1.7 million

•The decrease was primarily due to lower interest income and debt refinance fees in 2019.

Income Tax Expense: Increased $13.3 million to $22.1 million

•Income tax expense and our income tax rate increased in 2019 due to the release of valuation allowances related to Plant Nutrition South America in 2018 and discrete tax expense items in 2019 compared to benefits in 2018.

•Our effective tax rate increased from 11% in 2018 to 26% in 2019. Our effective tax rate in 2018 was impacted by the release of valuation allowances related to Plant Nutrition South America.

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

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 for the years ended December 31, 2020, 2019 and 2018. Sales primarily include revenue from the sales of our products, or “product sales,” and the impact of shipping and handling costs incurred to deliver our salt and plant nutrition products to our customers.

The results of operations of the consolidated records management business and other incidental revenues include sales of $10.1 million, $9.7 million and $10.5 million for 2020, 2019 and 2018, respectively. These sales are not material to our consolidated financial results and are not included in the following operating segment financial data.

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SALT SEGMENT RESULTS

	2020		2019		2018
Salt Sales (in millions)	$	779.4	$	889.5	$	858.1
Salt Operating Earnings (in millions)	$	161.8	$	168.0	$	115.7
Salt Sales Volumes (thousands of tons)
Highway deicing	7,534		8,748		9,597
Consumer and industrial	1,906		2,175		2,030
Total tons sold	9,440		10,923		11,627
Average Salt Sales Price (per ton)
Highway deicing	$	62.89	$	62.36	$	55.44
Consumer and industrial	$	160.33	$	158.09	$	160.65
Combined	$	82.56	$	81.43	$	73.80

SALT SEGMENT RESULTS COMMENTARY: 2019 – 2020

•Salt sales decreased 12%, or $110.1 million, due to lower Salt sales volumes, which was partially offset by higher average sales prices.

•Salt sales volumes decreased 14%, or 1,483,000 tons, and contributed approximately $118 million to the decrease in sales. Highway deicing sales volumes decreased 14% as a result of mild weather in North America and the U.K. when compared to 2019, which was partially offset by higher sales volumes to our chemical customers. Consumer and industrial sales volumes decreased 12% due to lower sales of deicing products due to the mild weather in 2020 and lower non-deicing sales volumes primarily due to COVID-19.

•Salt average sales price increased 1% and partially offset the decrease in sales by approximately $8 million due to slightly higher average sales prices.

•Highway deicing average sales prices increased 1%, reflecting higher prices realized in the first half of the year from higher North American highway deicing contract prices for the 2019-2020 winter season, and higher chemical customer prices, partially offset by lower North American highway deicing contract prices for the 2020-2021 winter season. Consumer and industrial average sales prices increased 1% due to non-deicing price increases in 2020.

•Salt operating earnings decreased 4%, or $6.2 million, due to lower sales volumes and higher per-unit product costs in 2020, which was partially offset by lower per-unit logistics costs. Per-unit product costs were higher in 2020 due to higher per-unit costs in the U.K. and at our consumer and industrial plants largely due to lower production volumes.

SALT SEGMENT RESULTS COMMENTARY: 2018 – 2019

•Salt sales increased 4%, or $31.4 million, due to higher highway deicing average sales prices and higher consumer and industrial sales volumes, which was partially offset by lower highway deicing sales volumes.

•Salt sales volumes decreased 6%, or 704,000 tons, which offset the increase in Salt segment sales by approximately $24 million. Highway deicing sales volumes decreased 9% as a result of mild weather in the U.K. when compared to the significantly above average U.K. 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 7% due to higher sales volumes of deicing and non-deicing products.

•Salt average sales price increased 10% and contributed approximately $55 million to the increase in Salt segment 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.

•Highway deicing average sales prices increased 12%, primarily as a result of the realization of higher North American highway deicing bid prices for the 2019-2020 winter season. Consumer and industrial average sales prices decreased 2% due to sales mix.

•Salt operating earnings increased 45%, or $52.3 million, due to higher highway deicing prices in 2019. Per-unit product costs were higher in 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 was unfavorably impacted by the labor strike at the Goderich mine.

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PLANT NUTRITION NORTH AMERICA RESULTS

	2020		2019		2018
Plant Nutrition North America Sales (in millions)	$	239.6	$	206.2	$	233.2
Plant Nutrition North America Operating Earnings (in millions)	$	12.1	$	22.5	$	25.3
Plant Nutrition North America Sales Volumes (thousands of tons)	383		317		362
Plant Nutrition North America Average Sales Price (per ton)	$	626	$	651	$	645

PLANT NUTRITION NORTH AMERICA RESULTS COMMENTARY: 2019 – 2020

•Plant Nutrition North America sales increased 16%, or $33.4 million, primarily due to higher sales volumes, which was partially offset by lower sales prices.

•Plant Nutrition North America sales volumes increased 21%, or 66,000 tons, and increased sales by approximately $43 million. The volume increase was primarily the result of suppressed demand in the first half of 2019 due to the cold and wet weather conditions in key North American markets and an upturn in the agriculture market during 2020.

•Plant Nutrition North America average sales prices decreased 4% which partially offset the increase in sales by approximately $10 million.

•Plant Nutrition North America operating earnings decreased 46%, or $10.4 million, due to higher per-unit product costs and lower average sales prices, which was partially offset by higher sales volumes and lower SG&A expenses. The higher per-unit product cost in 2020 was due to an inventory adjustment of $7.4 million related to an overstatement of bulk SOP stockpiles, unplanned downtime and feedstock inconsistency at our Ogden facility.

PLANT NUTRITION NORTH AMERICA RESULTS COMMENTARY: 2018 – 2019

•Plant Nutrition North America sales decreased 12%, or $27.0 million, primarily due to lower sales volumes.

•Plant Nutrition North America sales volumes decreased 12%, or 45,000 tons, and reduced sales by approximately $29 million. The volume decrease was primarily the result of 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 1% which partially offset the decrease in sales by approximately $2 million.

•Plant Nutrition North America operating earnings decreased 11%, or $2.8 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, as compared to 2018 beginning inventory. This decrease was partially offset by lower production costs resulting from improved production yield from our pond-based feedstock.

PLANT NUTRITION SOUTH AMERICA RESULTS

	2020		2019		2018
Plant Nutrition South America Sales (in millions)	$	344.4	$	385.1	$	391.8
Plant Nutrition South America Operating Earnings (in millions)	$	40.3	$	40.0	$	48.7
Plant Nutrition South America Sales Volumes (thousands of tons)
Agricultural productivity	485		452		461
Chemical solutions	339		338		300
Total tons sold	824		790		761
Average Plant Nutrition South America Sales Price (per ton)
Agricultural productivity	$	562	$	655	$	644
Chemical solutions	$	212	$	264	$	316
Combined	$	418	$	488	$	515

PLANT NUTRITION SOUTH AMERICA RESULTS COMMENTARY: 2019 – 2020

•Plant Nutrition South America sales decreased 11% or $40.7 million due to a 32% unfavorable weighted average change in the Brazilian real versus the U.S. dollar from the prior year, which was partially offset by higher sales volumes.

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•Plant Nutrition South America sales volumes increased 4%, or 34,000 tons, which contributed approximately $22 million to Plant Nutrition South America sales. Agricultural productivity sales volumes increased 7% due primarily to improvements in farmer economics and affordability of fertilizer products due to foreign exchange and barter rates. Chemical solutions sales volumes were essentially unchanged from the prior year as higher sales of chlor-alkali products were offset by reduced sales of water conditioning products.

•A 14% decrease in Plant Nutrition South America average sales price resulted in a decrease of approximately $63 million in Plant Nutrition South America sales due to the weakening of the Brazilian real versus the U.S. dollar. In local currency, average sales prices were up 14% due primarily to a 14% increase in agricultural productivity product sales prices as a result of a stronger product mix and price increases in most product lines.

•Plant Nutrition South America operating earnings increased 1%, or $0.3 million, primarily due to higher sales volumes and improved chemical margins due to production efficiencies, which were mostly offset by the weaker Brazilian real and higher SG&A costs in local currency due to incentive compensation and professional services.

PLANT NUTRITION SOUTH AMERICA RESULTS COMMENTARY: 2018 – 2019

•Plant Nutrition South America sales decreased 2% or $6.7 million as lower average sales prices were partially offset by higher sales volumes.

•Plant Nutrition South America sales volumes increased 4%, or 29,000 tons, and added approximately $6 million to Plant Nutrition South America sales. Chemical solutions sales volumes increased 13% due to new water treatment business in São Paulo. Agricultural productivity sales volumes decreased 2% primarily due to lower sales through our distribution sales channel which more than offset strong growth in our direct to grower sales channel.

•A 5% decrease in Plant Nutrition South America average sales price resulted in a decrease of approximately $13 million in Plant Nutrition South America sales. The decrease in average sales price was primarily due to a 16% decrease in chemical solutions average sales prices due to shifts in product sales mix, a weaker Brazilian real 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 real.

•Plant Nutrition South America operating earnings decreased 18%, or $8.7 million, primarily due to lower chemical solutions prices, higher raw materials input costs and continued investment in our direct to grower sales force.

OUTLOOK

•We expect Salt sales volumes to range from 11.0 million to 11.8 million tons in 2021.

•Plant Nutrition North America sales volumes are expected to range from 350,000 to 380,000 tons in 2021.

•We expect 2021 Plant Nutrition South America sales volumes to range from 850,000 to 925,000 tons.

•We have initiated a strategic evaluation of the long-term fit of our South America business and a strategic separation of our South American assets into two businesses, chemicals and specialty plant nutrition, with the intention of enabling a targeted and efficient sales process to unlock maximum value for each set of assets. This evaluation and separation could result in a variety of outcomes (see “Risk Factors—We may not successfully implement our strategies.” for more information).

•For information about the impact of the COVID-19 pandemic on the Company, see “–COVID-19 Pandemic” and “Risk Factors.”

Investments, Liquidity and Capital Resources

Overview

Over the last several years, we have made significant investments in order to strengthen our operational capabilities.

•We shifted all of our Goderich mine production to continuous mining in the fourth quarter of 2017 following significant investments in this technology. Our continuous mining and haulage system at the Goderich mine is expected to provide a safer, more sustainable production environment and enhance our ability to ramp up and down to meet demand fluctuations. In addition, we recently completed our shaft relining project at our Goderich mine, which we undertook to help secure the integrity of the mine and our hoisting capacity for the future.

•We have invested in our Ogden facility to strengthen our solar-pond-based SOP production through upgrades to our processing plant and our solar evaporation ponds. This included modifying our existing solar evaporation ponds to increase the annual solar harvest as well as the extraction yield and processing capacity of our SOP plant, which allows us to increase our SOP production capacity to approximately 550,000 tons when supplemental KCl feedstock is used. We also recently completed a project to expand our ability to compact product into various product grades at our Ogden facility.

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As a holding company, CMI’s investments in its operating subsidiaries constitute substantially all of its assets. Consequently, our subsidiaries conduct all of our consolidated operations and own substantially all of our operating assets. The principal source of 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 the credit agreement governing our credit facilities, including the total leverage ratio and interest coverage ratio, in order to pay dividends to our stockholders. We must also comply with the terms of our indentures governing our 4.875% Senior Notes due July 2024 (the “4.875% Notes”) and our 6.75% Senior Notes due December 2027 (the “6.75% Notes), which limit the amount of dividends we can pay to our stockholders. We are in compliance with our debt covenants as of December 31, 2020. See Item 8, Note 10 to our Consolidated Financial Statements for a discussion of our outstanding debt.

Historically, our cash flows from operating activities have generally been adequate to fund our basic operating requirements, ongoing debt service and sustaining investment in our property, plant and equipment. We have also used cash generated from operations to fund capital expenditures which strengthen our operational position, to pay dividends, to fund smaller acquisitions and to repay our debt. 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 December 31, 2020, we had $14.8 million of cash and cash equivalents (in our Consolidated Balance Sheets) that was either held directly or indirectly by foreign subsidiaries. Due in large part to the seasonality of our deicing salt business, we have experienced large changes in our working capital requirements from quarter to quarter. Historically, our working capital requirements have been the highest in the fourth quarter and lowest in the second quarter. When needed, we fund short-term working capital requirements by accessing our $300 million revolving credit facility.

We have historically considered the undistributed earnings of our foreign subsidiaries to be permanently reinvested. In December 2017, however, U.S. tax reform legislation was enacted, which included a one-time mandatory tax on previously deferred foreign earnings. As such, we revised our permanently reinvested assertion and we now expect to repatriate approximately $150 million of unremitted foreign earnings on which $4.3 million of income tax expense has been recorded for foreign withholding tax and state income taxes, consisting of $0.9 million recorded in 2019 and $3.4 million recorded in 2018. All of our non-U.S. undistributed earnings through December 31, 2017, were subject to the one-time mandatory tax for which we recorded a net tax expense of $52.1 million, which is comprised of tax expense of $55.2 million in 2017 offset by a benefit of $3.1 million in 2018. Due to our ability to generate adequate levels of U.S. cash flow on an annual basis, it is our current intention to continue to reinvest the 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. As of December 31, 2020, we have $213.6 million of outside basis differences for which no deferred taxes have been recorded. See Item 8, Note 8 to our Consolidated Financial Statements for a discussion regarding U.S. tax reform.

In addition, the amount of permanently reinvested foreign 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 U.S. and foreign subsidiaries are impacted by the transfer price charged on the transfer of our products between them. As discussed in Item 8, Note 8 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. 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 were made to Canadian taxing authorities of $17.5 million. Additional tax payments of $5.3 million were made during 2019 with the remaining liability of $1.4 million expected to be paid in 2021. Corresponding tax refunds of $22.2 million have been received as of December 31, 2020, from U.S. taxing authorities with the remaining refund of approximately $0.9 million expected in 2021. Additionally during 2018, we reached a settlement agreement on transfer pricing and management fees as part of an advanced pricing agreement with federal Canadian and U.S. tax authorities covering our 2013-2021 tax years. The recording of this settlement in 2018 resulted in increased sales for our Canadian subsidiary of $106.1 million and offsetting expenses for our U.S. subsidiary causing a domestic loss and significant foreign income in 2018. During 2019, in accordance with the settlement agreement, our U.S. subsidiary made an intercompany cash payment of $106.1 million to our Canadian subsidiary and tax payments were made to Canadian taxing authorities of $29.9 million with the remaining $1.4 million balance paid during 2020. Corresponding tax refunds of $59.7 million have been received as of December 31, 2020, from U.S. taxing authorities, with the remaining refund of $1.9 million expected in 2021. Canadian provincial taxing authorities continue to challenge our transfer prices of certain items. 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 foreign subsidiaries, which could impact the amount of permanently reinvested foreign earnings. See Item 8, Note 8 to our Consolidated Financial Statements for a discussion regarding our Canadian tax reassessments and settlements.

Principally due to the nature of our deicing business, our cash flows from operations have historically been seasonal, with the majority of our cash flows from operations generated during the first half of the calendar year (see “—Seasonality” for more information). When we have not been able to meet our short-term liquidity or capital needs with cash from operations, whether as a result of the seasonality of our business or other causes, we have met those needs with borrowings under our revolving credit facility. We expect to meet the ongoing requirements for debt service, any declared dividends and capital expenditures

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from these sources. This, to a certain extent, is subject to general economic, financial, competitive, legislative, regulatory and other factors that are beyond our control.

The table below provides a summary our cash flows by category and year.

2020	2019	2018
Operating Activities:
Net cash flows provided by operating activities were $175.2 million. »Net earnings were $59.5 million. »Non-cash depreciation and amortization expense was $137.9 million. »Working capital items were a use of operating cash flows of $42.9 million.	Net cash flows provided by operating activities were $159.6 million. »Net earnings were $62.5 million. »Non-cash depreciation and amortization expense was $137.9 million. »Working capital items were a use of operating cash flows of $59.9 million.	Net cash flows provided by operating activities were $182.3 million. »Net earnings were $68.8 million. »Non-cash depreciation and amortization expense was $136.9 million. »Working capital items were a use of operating cash flows of $19.9 million.
Investing Activities:
Net cash flows used by investing activities were $88.2 million. »Included $84.9 million of capital expenditures.	Net cash flows used by investing activities were $100.4 million. »Included $98.1 million of capital expenditures.	Net cash flows used by investing activities were $99.6 million. »Included $96.8 million of capital expenditures.
Financing Activities:
Net cash flows used by financing activities were $96.2 million. »Included net proceeds from the issuance of debt of $6.9 million, payments of dividends of $99.1 million and payments of $1.0 million related to deferred financing costs.	Net cash flows used by financing activities were $50.5 million. »Included net proceeds from issuance of debt of $62.0 million, payments of dividends of $98.1 million and payments of $12.8 million related to deferred financing costs.	Net cash flows used by financing activities were $85.9 million. »Included net proceeds from issuance of debt of $14.5 million, payments of dividends of $97.7 million and payments of $1.7 million related to deferred financing costs.

Capital Resources

We believe our primary sources of liquidity will continue to be cash flow from operations and borrowings under our revolving credit facility. We believe that our current banking syndicate is secure and believe we will have access to our entire revolving credit facility. We expect that ongoing requirements for debt service and committed or sustaining capital expenditures will primarily be funded from these sources. 

Our debt service obligations could, under certain circumstances, materially affect our financial condition and prevent us from fulfilling our debt obligations. See Item 1A, “Risk Factors—Our indebtedness and any inability to pay our indebtedness could adversely affect our business and financial condition.” Furthermore, CMI is a holding company with no operations of its own and is dependent on its subsidiaries for cash flow. As discussed in Item 8, Note 10 to our Consolidated Financial Statements, at December 31, 2020, we had $1.41 billion of outstanding indebtedness consisting of $250.0 million under our 4.875% Notes, $500.0 million under our 6.75% Notes, $520.3 million of borrowings outstanding under our senior secured credit facilities (consisting of term loans and a revolving credit facility), including $130.3 million borrowed against our revolving credit facility, and $92.8 million of debt related to our Plant Nutrition South American segment in Brazil. Letters of credit totaling $12.5 million as of December 31, 2020, reduced available borrowing capacity under the revolving credit facility to $157.2 million.

On June 30, 2020, certain of our U.S. subsidiaries entered into a three-year committed revolving accounts receivable financing facility for up to $100.0 million of borrowing with PNC Bank, National Association, as administrative agent and lender, and PNC Capital Markets, LLC, as structuring agent. At December 31, 2020, we had $51.2 million of outstanding loans under this accounts receivable financing facility. See Item 8, Note 10 to our Consolidated Financial Statements for more information.

In the future, including in 2021, we may borrow amounts under the revolving credit facility or enter into additional financing to fund our working capital requirements, potential acquisitions and capital expenditures and for other general corporate purposes.

Our ability to make scheduled interest and principal payments on our indebtedness, to refinance our indebtedness, to fund planned capital expenditures and to fund acquisitions will depend on our ability to generate cash in the future. This, to a certain extent, is subject to general economic, financial, competitive, legislative, regulatory and other factors that are beyond our control. Based on our current level of operations, we believe that cash flow from operations and available cash, together with available borrowings under our revolving credit facility, will be adequate to meet our liquidity needs over the next 12 months.

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We have various foreign and state net operating loss (“NOL”) carryforwards that may be used to offset a portion of future taxable income to reduce our cash income taxes that would otherwise be payable. However, we may not be able to use any or all of our NOL carryforwards to offset future taxable income and our NOL carryforwards may become subject to additional limitations due to future ownership changes or otherwise. At December 31, 2020, we had $7.8 million of gross NOL carryforwards ($7.7 million of gross foreign federal NOL carryforwards that have no expiration date and $0.1 million of gross foreign federal NOL carryforwards that expire in 2033) and $0.2 million of net operating tax-effected state NOL carryforwards that expire beginning in 2027.

We have a defined benefit pension plan for certain of our current and former U.K. employees. Beginning December 1, 2008, future benefits ceased to accrue for the remaining active employee participants in the plan concurrent with the establishment of a defined contribution plan for these employees. Generally, our cash funding policy is to make the minimum annual contributions required by applicable regulations. As of December 31, 2020, the fair value of the plan’s assets are less than the accumulated benefit obligations and we could be required to use cash from operations above our historical levels to fund the plan in the future.

Off-Balance Sheet Arrangements

At December 31, 2020, we had no off-balance sheet arrangements that have or are likely to have a material current or future effect on our consolidated financial statements.

Contractual Obligations

Our contractual cash obligations and commitments as of December 31, 2020, are as follows (in millions):

Payments Due by Period

Contractual Cash Obligations	Total		2021		2022		2023		2024		2025		Thereafter
Long-term Debt	$	1,414.3	$	63.7	$	57.8	$	72.5	$	270.0	$	450.3	$	500.0
Interest(a)	330.4		61.0		58.3		56.5		50.9		36.2		67.5
Finance Lease Obligations(b)	12.0		1.8		1.2		1.1		0.9		0.9		6.1
Operating Leases(b)	66.5		16.4		13.1		8.4		5.7		4.9		18.0
Unconditional Purchase Obligations(c)	84.3		43.6		13.3		10.0		7.8		2.1		7.5
One-time Transition Tax Obligation	35.8		3.7		3.8		7.1		9.4		11.8		—
Estimated Future Pension Benefit Obligations(d)	73.3		3.2		3.2		3.3		3.4		3.4		56.8
Total Contractual Cash Obligations	$	2,016.6	$	193.4	$	150.7	$	158.9	$	348.1	$	509.6	$	655.9
Other Commitments	Total		2021		2022		2023		2024		2025		Thereafter
Letters of Credit	$	12.5	$	12.5	$	—	$	—	$	—	$	—	$	—
Performance Bonds(e)	51.4		41.2		10.1		0.1		—		—		—
Total Other Commitments	$	63.9	$	53.7	$	10.1	$	0.1	$	—	$	—	$	—

(a)Based on maintaining existing debt balances to maturity. Interest on our credit facilities varies with the Eurodollar rate and the base rate. The December 31, 2020 blended rate of 4.5%, including the applicable spread, was used for this calculation for CMI debt. The amounts in the table do not include interest payments of approximately $5.4 million each year which may be required to be deposited with the taxing authorities if other collateral arrangements cannot be made as long as disputes with Canadian taxing authorities remain outstanding. Item 8, Note 8 to our Consolidated Financial Statements provides additional information related to our Canadian tax reassessments.

(b)We lease property and equipment under non-cancelable operating and capital leases for varying periods.

(c)We have contracts to purchase certain amounts of electricity, equipment and raw materials. In addition, we have minimum throughput commitments in certain depots and warehouses.

(d)Item 8, Note 9 to our Consolidated Financial Statements provides additional information.

(e)Item 8, Note 12 to our Consolidated Financial Statements provides additional information.

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Reconciliation of Net Earnings 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. generally accepted accounting principles (“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 and cost of capital, and income tax positions are managed at a corporate level, apart from the activities of the operating segments, and the operating facilities are located in different taxing jurisdictions, which can cause considerable variation in net earnings. We also use EBITDA and Adjusted EBITDA to assess our operating performance and return on capital against other companies, and to evaluate potential acquisitions or other capital projects. EBITDA and Adjusted EBITDA are not calculated under U.S. GAAP and should not be considered in isolation or as a substitute for net 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, refinancing costs, stock-based compensation 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. Our employees are vital to our operations and we utilize various stock-based awards to compensate and incentivize our employees. 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. 

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

	For the Year Ended December 31,
	2020		2019		2018
Net earnings	$	59.5	$	62.5	$	68.8
Interest expense	71.2		68.4		62.5
Income tax expense	11.7		22.1		8.8
Depreciation, depletion and amortization	137.9		137.9		136.9
EBITDA	280.3		290.9		277.0
Adjustments to EBITDA:
Stock-based compensation - non cash	9.4		6.3		7.8
(Gain) loss on foreign exchange	(0.4)		13.0		(5.8)
Executive transition costs	—		2.3		5.1
Logistics impact from flooding	—		2.8		—
Other income, net	(0.1)		(1.7)		(3.0)
Adjusted EBITDA	$	289.2	$	313.6	$	281.1

In 2019, operating results included $2.8 million of additional logistics costs related to Mississippi river flooding and $2.3 million of severance and other costs related to executive transition. In 2018, we incurred $5.1 million of executive transition costs. Adjusted EBITDA also includes other non-operating income, primarily non-cash stock-based compensation expense, foreign exchange gains (losses) resulting from the translation of intercompany obligations, interest income and investment income (loss) relating to our nonqualified retirement plan.

Our net earnings, EBITDA and Adjusted EBITDA are impacted by other events or transactions that we believe to be important in understanding our earnings trends such as the variability of weather. The impact of weather has not been adjusted in the amounts presented above. Our 2020 results were unfavorably impacted by mild winter in the markets we serve and 2019 results were favorably impacted by above average winter weather. In 2018, winter weather was average.

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Management’s Discussion of Critical Accounting Policies and Estimates

The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the reporting date and the reported amounts of revenue and expenses during the reporting period. Actual results could vary from these estimates. We have identified the critical accounting policies and estimates that are most important to the portrayal of our financial condition and results of operations. The policies set forth below require significant subjective or complex judgments by management, often as a result of the need to make estimates about the effect of matters that are inherently uncertain.

Goodwill – We test goodwill for impairment annually in the fourth quarter or more frequently if an impairment indicator is present. The quantitative impairment test requires judgment, including the identification of reporting units and the determination of fair value of each reporting unit. We determine the estimated fair value for each reporting unit based on discounted cash flow projections (income approach) and market values for comparable businesses (market approach). Under the income approach, we are required to make judgments about appropriate discount rates, long-term revenue growth rates and the amount and timing of expected future cash flows. The cash flows used in our estimates are based on the reporting unit's forecast, long-term business plan, and recent operating performance. Discount rate assumptions are based on an assessment of the risk inherent in the future cash flows of the respective reporting unit and market conditions. Our estimates may differ from actual future cash flows. The risk adjusted discount rate used is consistent with the weighted average cost of capital of our peer companies and is intended to represent a rate of return that would be expected by a market participant. Under the market approach, market multiples are derived from market prices of stocks of companies in our peer group. The appropriate multiple is applied to the forecasted revenue and earnings before interest, taxes, depreciation and amortization of the reporting unit to obtain an estimated fair value.

As of December 31, 2020, we have recorded goodwill of $281.3 million, primarily including $56.4 million in our Plant Nutrition North America segment and $218.8 million in our Plant Nutrition South America segment. As of the October 1, 2020 annual measurement date, each segment had an estimated fair value that exceeded its carrying value. The most critical assumptions used in the calculation of the fair value are the projected revenue growth rates, long-term operating margin, working capital requirements, terminal growth rates, discount rate, and the selection of market multiples. The projected long term operating margin utilized in our fair value estimates is consistent with our operating plan and is dependent on the successful execution of our long-term business plan, overall industry growth rates and the competitive environment. The discount rate could be adversely impacted by changes in the macroeconomic environment and volatility in the equity and debt markets. Although management believes its estimate of fair value is reasonable, if the future financial performance falls below our expectations or there are negative revisions to significant assumptions, or if our market capitalization declines, we may need to record a non-cash goodwill impairment charge in a future period.

Mineral Interests – As of December 31, 2020, we maintained $123.1 million of net mineral properties as a part of property, plant and equipment. Mineral interests include probable mineral reserves. We lease mineral reserves at several of our extraction facilities. These leases have varying terms, and many provide for a royalty payment to the lessor based on a specific amount per ton of mineral extracted or as a percentage of sales.

Mineral interests are primarily depleted on a units-of-production method based on third-party estimates of recoverable reserves. Our rights to extract minerals are generally contractually limited by time or lease boundaries. If we are not able to continue to extend lease agreements, as we have in the past, at commercially reasonable terms, without incurring substantial costs or incurring material modifications to the existing lease terms and conditions, if the assigned lives realized are less than those projected by management, or if the actual size, quality or recoverability of the minerals is less than the estimated probable reserves, then the rate of amortization could be increased or the value of the reserves could be reduced by a material amount.

Income Taxes – Developing our provision for income taxes and analyzing our potential tax exposure items requires significant judgment and assumptions as well as a thorough knowledge of the tax laws in various jurisdictions. These estimates and judgments occur in the calculation of certain tax liabilities and in the assessment of the likelihood that we will be able to realize our deferred tax assets, which arise from temporary differences between the tax and financial statement recognition of revenue and expense, carryforwards and other items. Based on all available evidence, both positive and negative, the reliability of that evidence and the extent such evidence can be objectively verified, we determine whether it is more likely than not that all, or a portion of, the deferred tax assets will be realized.

In evaluating our ability to realize our deferred tax assets, we consider the sources and timing of taxable income, our ability to carry back tax attributes to prior periods, qualifying tax planning and estimates of future taxable income exclusive of reversing temporary differences. In determining future taxable income, our assumptions include the amount of pre-tax operating income according to multiple federal, international and state taxing jurisdictions, the origination of future temporary differences and the implementation of feasible and prudent tax planning. These assumptions require significant judgment about material estimates, assumptions and uncertainties in connection with the forecasts of future taxable income, the merits in tax law and assessments regarding previous taxing authorities’ proceedings or written rulings. While these assumptions are consistent with

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the plans and estimates we use to manage the underlying businesses, differences in our actual operating results or changes in our tax planning, tax credits, tax laws or our assessment of the tax merits of our positions could affect our future assessments.

In addition, the calculation of our tax liabilities involves uncertainties in the application of complex tax regulations in multiple jurisdictions. We recognize potential liabilities in accordance with applicable GAAP for anticipated tax issues in the U.S. and other tax jurisdictions based on our estimate of whether, and the extent to which, additional taxes will be due. If payment of these amounts ultimately proves to be unnecessary, the reversal of the liabilities would result in tax benefits being recognized in the period when we determine the liabilities are no longer necessary. If our estimate of tax liabilities proves to be less than the ultimate assessment, a further charge to expense would result. See Item 8, Note 8 to our Consolidated Financial Statements for further discussion of our income taxes.

We have elected to account for GILTI in the year the tax is incurred, rather than recognize deferred taxes for temporary basis differences expected to reverse as GILTI in future years.

Taxes on Foreign Earnings – Our 2018 effective tax rate includes a tax benefit of $3.1 million related to the one-time mandatory tax on non-U.S. undistributed earnings deemed repatriated under U.S tax reform. As such, we revised our permanently reinvested assertion and we now expect to repatriate approximately $150 million of unremitted foreign earnings on which $4.3 million of income tax expense has been recorded for foreign withholding tax and state income taxes, consisting of $0.9 million recorded in 2019 and $3.4 million recorded in 2018. We consider all remaining non-U.S. earnings to be permanently reinvested outside the U.S. to the extent these earnings are not subject to U.S. income tax under an anti-deferral tax regime. As of December 31, 2020, we have approximately $213.6 million of outside basis differences on which no deferred taxes have been recorded.

U.K. Pension Plan – We have a defined benefit pension plan covering some of our current and former employees in the U.K. The U.K. pension plan was closed to new participants in 1992. As we elected to freeze our pension plan, our remaining active employees ceased to accrue future benefits under the plan beginning December 1, 2008. We select the actuarial assumptions for our pension plan after consultation with our actuaries and consideration of market conditions. These assumptions include the discount rate and the expected long-term rates of return on plan assets, which are used in the calculation of the actuarial valuation of our defined benefit pension plans. If actual conditions or results vary from those projected by management, adjustments may be required in future periods to meet minimum pension funding or to increase pension expense or our pension liability. A decrease of 25 basis points in our discount rate would have increased our projected benefit obligation as of December 31, 2020, by approximately $2.6 million and would increase our net periodic pension expense for 2020 by approximately $0.3 million. A decrease of 25 basis points in our expected return on assets assumption as of December 31, 2020, would increase our net periodic expense for 2020 by approximately $0.2 million.

We set our discount rate for our U.K. pension plan based on a forward yield curve for a portfolio of high credit quality bonds with expected cash flows and an average duration closely matching the expected benefit payments under the plan. The assumption for the return on plan assets is determined based on expected returns applicable to each type of investment within the portfolio expected to be maintained over the next 15 to 20 years. Our funding policy has been to make the minimum annual contributions required by applicable regulations. However, we have made special payments during some years when changes in the business could reasonably impact the pension plan’s available assets and when special early retirement payments or other inducements are made to pensioners. Contributions totaled $0.4 million, $1.7 million and $0.7 million during the years ended December 31, 2020, 2019 and 2018, respectively. If supplemental benefits were approved and granted under the provisions of the plan, or if periodic statutory valuations cause a change in funding requirements, our contributions could increase to fund all or a portion of those benefits. See Item 8, Note 9 to our Consolidated Financial Statements for additional discussion of our U.K. pension plan.

Other Significant Accounting Policies – Other significant accounting policies not involving the same level of measurement uncertainties as those discussed above are nevertheless important to an understanding of our consolidated financial statements. Policies related to revenue recognition, allowance for doubtful accounts, valuation of inventory reserves, equity compensation instruments, intangible assets, legal reserves, derivative instruments and environmental accruals require judgments on complex matters.

Effects of Currency Fluctuations and Inflation

 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 enter 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 historical 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

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Canadian dollars, Brazilian reais and British pounds sterling also being significant. We generated 43% of our 2020 sales in foreign currencies, and we incurred 44% of our 2020 total operating expenses in foreign currencies. Additionally, we have approximately $1.0 billion of net assets denominated in foreign currencies. In 2018 and 2019, the average rate for the U.S. dollar strengthened against the Brazilian real, the Canadian dollar and the British pound sterling. In 2020, the average rate for the U.S. dollar strengthened against the Brazilian real but weakened against the Canadian dollar and the British pound sterling. Significant changes in the value of the Canadian dollar, Brazilian real or the British pound sterling relative to the U.S. dollar could have a material adverse effect on our financial condition and our ability to meet interest and principal payments on U.S. dollar-denominated debt, including borrowings under our senior secured credit facilities.

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, including our salt deicing product sales. Consequently, our Salt segment 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 businesses are also seasonal. The strongest demand for our Plant Nutrition South America segment 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 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).     

Recent Accounting Pronouncements 

See Item 8, Note 2 to our Consolidated Financial Statements for a discussion of recent accounting pronouncements.

ITEM 7A.    QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Our business is subject to various types of market risks that include, but are not limited to, interest rate risk, foreign currency risk and commodity pricing risk. Management may take actions to mitigate our exposure to these types of risks including entering into forward purchase contracts and other financial instruments. 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.

Interest Rate Risk

As of December 31, 2020, we had $520.3 million of debt outstanding under our credit agreement (consisting of term loans and revolving credit facility) and $92.8 million of debt related to our Plant Nutrition South America segment in Brazil, bearing interest at variable rates. Accordingly, our earnings and cash flows will be affected by changes in interest rates to the extent the principal balance is unhedged. Assuming no change in the amount of debt outstanding, a 100 basis point increase in the average interest rate under these borrowings would have increased the interest expense related to our variable rate debt by approximately $6.1 million based upon our debt outstanding as of December 31, 2020. Actual results may vary due to changes in the amount of variable rate debt outstanding.

As of December 31, 2020, a significant portion of the investments in the U.K. pension plan are in bond funds. Changes in interest rates could impact the value of the investments in the pension plan.

Foreign Currency Risk

 In addition to the U.S., we primarily conduct our business in Canada, Brazil and the U.K. Our operations are, therefore, subject to volatility because of currency fluctuations, inflation changes and changes in political and economic conditions in these countries. Sales and expenses are frequently denominated in local currencies, and our results of operations may be affected adversely as currency fluctuations affect our product prices and operating costs or those of our competitors. We may engage in hedging activities, including forward foreign currency exchange contracts, to reduce the exposure of our cash flows to fluctuations in foreign currency exchange rates. We do not engage in hedging for speculative investment purposes. Any hedging activities may not eliminate or substantially reduce risks associated with fluctuating currencies. See “Risk Factors—Risks associated with our international operations and sales and changes in economic and political environments could adversely affect our business and earnings.”

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Considering our foreign earnings, a hypothetical 10% unfavorable change in exchange rates compared to the U.S. dollar would have an estimated $3.2 million impact on our operating earnings for the year ended December 31, 2020. Actual changes in market prices or rates will differ from hypothetical changes.

Our subsidiary in Brazil has U.S. dollar denominated debt. We have entered into foreign currency swap agreements to swap interest and principal payments on the loans denominated in U.S. dollars for principal and interest payments denominated in Brazilian real, the 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 subsidiary’s functional currency. We may either continue to hedge this exposure or borrow in Brazilian real to meet the capital needs of our Brazilian operations.

Commodity Pricing Risk

 We have a hedging policy to mitigate the impact of fluctuations in the price of natural gas. The notional amounts of volumes hedged are determined based on a combination of factors, including estimated natural gas usage, current market prices and historical market prices. We enter into contractual natural gas price arrangements, which effectively fix the purchase price of our natural gas requirements up to 36 months in advance of the physical purchase of the natural gas. We may hedge up to approximately 90% of our expected natural gas usage. Because of the varying locations of our production facilities, we also enter into basis swap agreements to eliminate any further price variation due to local market differences. We have determined that these financial instruments qualify as cash flow hedges under U.S. GAAP. As of December 31, 2020, the amount of natural gas hedged with derivative contracts totaled 2.5 million MMBtus, of which 1.7 million MMBtus will expire within one year.

Excluding natural gas hedged with derivative instruments, a hypothetical 10% adverse change in our natural gas prices during the year ended December 31, 2020, would have increased our product cost by approximately $0.4 million. Actual results will vary due to actual changes in market prices and consumption.

We are subject to increases and decreases in the cost of transporting our products due to variations in our contracted carriers’ cost of fuel, which is typically diesel fuel. We may engage in hedging activities, including forward contracts, to reduce our exposure to changes in our transportation cost due to changes in the cost of fuel in the future. Our historical results do not reflect any direct fuel hedging activity. However, hedging activities may not eliminate or substantially reduce the risks associated with changes in our transportation costs. Due to the difficulty in meeting all of the requirements for hedge accounting under current GAAP, any such cash flow hedges of transportation costs would likely be accounted for by marking the hedges to market at each reporting period. We do not engage in hedging for speculative investment purposes.

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ITEM 8.    FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

Description	Page
Reports of Independent Registered Public Accounting Firm	55
Consolidated Balance Sheets as of December 31, 2020 and 2019	58
Consolidated Statements of Operations for each of the three years in the period ended December 31, 2020	59
Consolidated Statements of Comprehensive (Loss) Income for each of the three years in the period ended December 31, 2020	60
Consolidated Statements of Stockholders’ Equity for each of the three years in the period ended December 31, 2020	61
Consolidated Statements of Cash Flows for each of the three years in the period ended December 31, 2020	62
Notes to Consolidated Financial Statements	63

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Report of Independent Registered Public Accounting Firm

To the Stockholders and the Board of Directors of Compass Minerals International, Inc.

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Compass Minerals International, Inc. (the Company) as of December 31, 2020 and 2019, and the related consolidated statements of operations, comprehensive (loss) income, stockholders’ equity and cash flows for each of the three years in the period ended December 31, 2020, and the related notes and the financial statement schedule listed in the Index at Item 15(a) (2) (collectively, referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company at December 31, 2020 and 2019, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2020, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2020, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) and our report dated February 26, 2021, expressed an unqualified opinion thereon.

Basis for Opinion

These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current period audit of the financial statements that was communicated or required to be communicated to the audit committee and that: (1) relates to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of the critical audit matter does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the account or disclosures to which it relates.

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	Valuation of Goodwill
Description of the Matter	At December 31, 2020, the Company’s consolidated goodwill was $281.3 million, of which $218.8 million is recorded within the Company’s Plant Nutrition South America segment and $56.4 million is recorded in the Company’s Plant Nutrition North America segment. As discussed in Note 2 of the consolidated financial statements, goodwill is tested for impairment at least annually, or more frequently if indicators exist, at the reporting unit level. The Company uses both qualitative and quantitative methods to test goodwill for impairment, as deemed appropriate. The Company’s goodwill is initially assigned to its reporting units on the acquisition date at its determined fair value. Auditing management’s annual goodwill impairment test was complex and judgmental due to the significant estimation required in determining the fair value of the Company’s Plant Nutrition South America and Plant Nutrition North America reporting units. In particular, the fair value estimate was sensitive to significant assumptions such as the weighted average cost of capital at the impairment assessment date and projected revenue growth rates, operating margins and the Company’s terminal growth rates which are affected by expectations about future market or economic conditions. Additionally, there were significant judgments around the Company’s selection of guideline company market multiples.
How We Addressed the Matter in Our Audit	We obtained an understanding, evaluated the design and tested the operating effectiveness of controls over the Company’s goodwill impairment assessment process. For example, we tested controls over management's review of the significant assumptions (e.g., weighted average cost of capital, projected revenue growth rates, operating margins, the Company’s terminal growth rates, and selection of guideline company market multiples) used to develop the prospective financial information and guideline company data for the quantitative analysis. We also tested management's controls to validate that the data used in the quantitative analysis was complete and accurate. To test the estimated fair value of the Company’s Plant Nutrition South America and Plant Nutrition North America reporting units, we performed audit procedures that included, among others, assessing the fair value methodologies utilized and testing the significant assumptions discussed above, as well as the underlying data used by the Company in its analysis. We involved our specialists to assist in the review of the Company’s model, method, and the more sensitive assumptions such as the weighted average cost of capital and the Company’s terminal growth rate assumptions. We compared the significant assumptions used by management to current industry and economic trends, changes to the Company’s business model, customer base or product mix and other relevant factors. We assessed the historical accuracy of management’s estimates and performed sensitivity analyses of significant assumptions to evaluate the changes in the fair value of the reporting units that would result from changes in the assumptions. In addition, we reviewed the reconciliation of the fair value of all of the Company’s reporting units to the market capitalization of the Company.

/s/ Ernst & Young LLP

We have served as the Company’s auditor since 2005.

Kansas City, Missouri

February 26, 2021

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Report of Independent Registered Public Accounting Firm

To the Stockholders and the Board of Directors of Compass Minerals International, Inc.

Opinion on Internal Control Over Financial Reporting

We have audited Compass Minerals International, Inc.’s internal control over financial reporting as of December 31, 2020, based on criteria established in Internal Control - Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework), (the COSO criteria). In our opinion, Compass Minerals International, Inc. (the Company) maintained, in all material respects, effective internal control over financial reporting as of December 31, 2020, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated balance sheets of the Company as of December 31, 2020 and 2019, the related consolidated statements of operations, comprehensive (loss) income, stockholders’ equity and cash flows for each of the three years in the period ended December 31, 2020, and the related notes and the financial statement schedule listed in the Index 15(a)(2) and our report dated February 26, 2021 expressed an unqualified opinion thereon.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management’s Report on Internal Controls Over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects.

Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control Over Financial Reporting

A company’s internal control over financial reporting is a process designed 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. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ Ernst & Young LLP

Kansas City, Missouri

February 26, 2021

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Consolidated Balance Sheets

	December 31,
(In millions, except share data)	2020		2019
ASSETS
Current assets:
Cash and cash equivalents	$	21.0	$	34.7
Receivables, less allowance for doubtful accounts of $11.1 in 2020 and $10.7 in 2019	296.7		342.4
Inventories	370.6		311.5
Other	68.9		96.4
Total current assets	757.2		785.0
Property, plant and equipment, net	964.9		1,030.8
Intangible assets, net	85.0		103.0
Goodwill	281.3		343.0
Investment in equity investee	20.0		24.9
Other	154.0		156.5
Total assets	$	2,262.4	$	2,443.2
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
Current portion of long-term debt	$	63.7	$	52.1
Accounts payable	116.8		126.2
Accrued salaries and wages	38.7		34.4
Income taxes payable	5.5		10.4
Accrued interest	10.4		11.3
Accrued expenses and other current liabilities	61.2		61.5
Total current liabilities	296.3		295.9
Long-term debt, net of current portion	1,337.7		1,363.9
Deferred income taxes, net	87.5		89.9
Other noncurrent liabilities	153.9		163.9
Commitments and contingencies (Note 12)
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	127.0		117.1
Treasury stock, at cost — 1,407,926 shares at December 31, 2020 and 1,481,611 shares at December 31, 2019	(4.4)		(3.2)
Retained earnings	567.3		607.4
Accumulated other comprehensive loss	(303.3)		(192.1)
Total stockholders' equity	387.0		529.6
Total liabilities and stockholders' equity	$	2,262.4	$	2,443.2

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

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Consolidated Statements of Operations

	For the Year Ended December 31,
(In millions, except share data)	2020		2019		2018
Sales	$	1,373.5	$	1,490.5	$	1,493.6
Shipping and handling cost	266.6		312.5		320.0
Product cost	794.6		841.2		879.7
Gross profit	312.3		336.8		293.9
Selling, general and administrative expenses	171.8		173.2		163.6
Operating earnings	140.5		163.6		130.3
Other expense (income):
Interest expense	71.2		68.4		62.5
Net earnings in equity investee	(1.4)		(0.7)		(1.0)
(Gain) loss on foreign exchange	(0.4)		13.0		(5.8)
Other, net	(0.1)		(1.7)		(3.0)
Earnings before income taxes	71.2		84.6		77.6
Income tax expense	11.7		22.1		8.8
Net earnings	$	59.5	$	62.5	$	68.8
Basic net earnings per common share	$	1.72	$	1.82	$	2.02
Diluted net earnings per common share	$	1.72	$	1.81	$	2.02
Weighted-average common shares outstanding (in thousands):
Basic	33,928		33,882		33,848
Diluted	33,928		33,882		33,848

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

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Consolidated Statements of Comprehensive (Loss) Income

	For the Year Ended December 31,
(In millions)	2020		2019		2018
Net earnings	$	59.5	$	62.5	$	68.8
Other comprehensive (loss) income:
Unrealized loss from change in pension costs, net of tax of $0.8, $0.5 and $0.1 in 2020, 2019 and 2018, respectively	(2.5)		(2.4)		(0.6)
Unrealized gain on cash flow hedges, net of tax of $(0.3), $(0.1) and $(0.2) in 2020, 2019 and 2018, respectively	0.8		0.1		0.4
Cumulative translation adjustment	(109.5)		21.1		(132.6)
Comprehensive (loss) income	$	(51.7)	$	81.3	$	(64.0)

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

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Consolidated Statements of Stockholders’ Equity

(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)							68.8		(132.8)		(64.0)
Stranded tax effect from tax reform							0.2		(0.2)		—
Dividends on common stock/equity awards ($2.88 per share)			0.3				(98.0)				(97.7)
Stock-based compensation			7.3								7.3
Balance, December 31, 2018	$	0.4	$	110.1	$	(2.9)	$	643.5	$	(210.9)	$	540.2
Comprehensive income							62.5		18.8		81.3
Cumulative effect of change in accounting principle							(0.1)				(0.1)
Dividends on common stock/equity awards ($2.88 per share)			0.4				(98.5)				(98.1)
Stock-based compensation			6.6								6.6
Shares issued for stock units, net of shares withheld for taxes					(0.3)						(0.3)
Balance, December 31, 2019	$	0.4	$	117.1	$	(3.2)	$	607.4	$	(192.1)	$	529.6
Comprehensive income (loss)							59.5		(111.2)		(51.7)
Dividends on common stock/equity awards ($2.88 per share)			0.5				(99.6)				(99.1)
Shares issued for stock units, net of shares withheld for taxes					(1.1)						(1.1)
Stock-based compensation			9.4								9.4
Stock options exercised, net of shares withheld for taxes					(0.1)						(0.1)
Balance, December 31, 2020	$	0.4	$	127.0	$	(4.4)	$	567.3	$	(303.3)	$	387.0

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

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Consolidated Statements of Cash Flows

	For the Year Ended December 31,
(In millions)	2020		2019		2018
Cash flows from operating activities:
Net earnings	$	59.5	$	62.5	$	68.8
Adjustments to reconcile net earnings to net cash flows provided by operating activities:
Depreciation, depletion and amortization	137.9		137.9		136.9
Finance fee amortization	3.2		2.8		2.2
Refinancing of long-term debt	0.1		0.3		—
Stock-based compensation	9.4		6.3		7.8
Deferred income taxes	5.4		(11.8)		(16.7)
Net earnings in equity investee	(1.4)		(0.7)		(1.0)
Unrealized foreign exchange (gain) loss	(2.8)		15.0		0.1
Other, net	6.8		7.2		4.1
Changes in operating assets and liabilities:
Receivables	19.5		(31.3)		16.4
Inventories	(71.4)		(45.4)		(16.8)
Other assets	21.1		23.9		(18.4)
Accounts payable and accrued expenses and other current liabilities	(3.7)		(12.1)		21.1
Other liabilities	(8.4)		5.0		(22.2)
Net cash provided by operating activities	175.2		159.6		182.3
Cash flows from investing activities:
Capital expenditures	(84.9)		(98.1)		(96.8)
Other, net	(3.3)		(2.3)		(2.8)
Net cash used in investing activities	(88.2)		(100.4)		(99.6)
Cash flows from financing activities:
Proceeds from revolving credit facility borrowings	300.0		574.1		457.4
Principal payments on revolving credit facility borrowings	(329.7)		(611.1)		(429.1)
Proceeds from issuance of long-term debt	115.8		1,001.8		54.3
Principal payments on long-term debt	(79.2)		(902.8)		(68.1)
Dividends paid	(99.1)		(98.1)		(97.7)
Deferred financing costs	(1.0)		(12.8)		(1.7)
Shares withheld to satisfy employee tax obligations	(1.1)		(0.3)		—
Other, net	(1.9)		(1.3)		(1.0)
Net cash used in financing activities	(96.2)		(50.5)		(85.9)
Effect of exchange rate changes on cash and cash equivalents	(4.5)		(1.0)		(6.4)
Net change in cash and cash equivalents	(13.7)		7.7		(9.6)
Cash and cash equivalents, beginning of the year	34.7		27.0		36.6
Cash and cash equivalents, end of period	$	21.0	$	34.7	$	27.0
Supplemental cash flow information:
Interest paid, net of amounts capitalized	$	65.0	$	60.7	$	52.1
Income taxes paid, net of refunds	$	(10.3)	$	33.9	$	38.3

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

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Notes to Consolidated Financial Statements

1.    ORGANIZATION AND FORMATION

Compass Minerals International, Inc. (“CMI”), through its subsidiaries (collectively, “CMP,” “Compass Minerals” or the “Company”), is a leading producer of essential minerals focused on safely delivering where and when it matters to help solve nature’s challenges for customers and communities. Its salt products help keep roadways safe during winter weather and are used in numerous other consumer, industrial and agricultural applications. Its plant nutrition business manufactures an innovative and diverse portfolio of products that improve the quality and yield of crops, while supporting sustainable agriculture. Additionally, its specialty chemical business serves the water treatment industry and other industrial processes. The Company’s principal products are salt, consisting of sodium chloride and magnesium chloride, sulfate of potash (“SOP”), secondary nutrients and micronutrients; and specialty chemicals. The Company’s production sites are located in the United States (“U.S.”), Canada, Brazil and the United Kingdom (“U.K.”). The Company also provides records management services in the U.K.

CMI is a holding company with no operations other than those of its subsidiaries.

2.    SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

a. Management Estimates:

The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) as included in the Accounting Standards Codification requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates.

b. Basis of Consolidation:

The Company’s consolidated financial statements include the accounts of CMI and its wholly-owned domestic and foreign subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation.

c. Reclassifications:

The Company has made reclassifications of prior year amounts in Consolidated Statements of Operations to conform to current year presentation.

d. Foreign Currency:

Assets and liabilities are translated into U.S. dollars at end of period exchange rates. Revenues and expenses are translated using the monthly average rates of exchange during the year. Adjustments resulting from the translation of foreign-currency financial statements into the reporting currency, U.S. dollars, are included in accumulated other comprehensive loss. The Company recorded foreign exchange losses of $(72.6) million, $(1.2) million and $(56.5) million in 2020, 2019 and 2018, respectively, in accumulated other comprehensive loss related to intercompany notes which were deemed to be of long-term investment nature. Aggregate exchange (gains) losses from transactions denominated in a currency other than the functional currency, which are included in other expense (income), for the years ended December 31, 2020, 2019 and 2018, were $(0.4) million, $13.0 million and $(5.8) million, respectively.

e. Revenue Recognition:

The Financial Accounting Standards Board (the “FASB”) revenue recognition guidance provides a single, comprehensive model for recognizing revenue from contracts with customers. The revenue recognition model requires revenue to be recognized upon the transfer of promised goods or services to customers in an amount that reflects the consideration an entity expects to receive in exchange for those goods or services. The Company’s revenue arrangements generally consist of a single performance obligation to transfer promised goods or services. Accordingly, substantially all of the Company’s revenue is recognized at a point in time when control of the goods transfers to the customer.

The Company typically recognizes revenue at the time of shipment to the customer, which coincides with the transfer of title and risk of ownership to the customer. Sales represent billings to customers net of sales taxes charged for the sale of the product. Sales include amounts charged to customers for shipping and handling costs, which are expensed when the related product is sold.

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f. Cash and Cash Equivalents:

The Company considers all investments with original maturities of three months or less to be cash equivalents. The Company maintains the majority of its cash in bank deposit accounts with several commercial banks with high credit ratings in the U.S., Canada, Brazil and Europe. Typically, the Company has bank deposits in excess of federally insured limits. Currently, the Company does not believe it is exposed to significant credit risk on its cash and cash equivalents.

g. Accounts Receivable and Allowance for Doubtful Accounts:

Receivables consist almost entirely of trade accounts receivable. Trade accounts receivable are recorded at the invoiced amount and do not bear interest. The allowance for doubtful accounts is the Company’s best estimate of the amount of probable credit losses in its existing trade accounts receivable. The Company determines the allowance based on historical write-off experience by business line and a current assessment of its portfolio, including information regarding individual customers. The Company reviews its past due account balances for collectability and adjusts its allowance for doubtful accounts accordingly. Account balances are charged off against the allowance when the Company believes it is probable that the trade accounts receivable will not be recovered.

During 2020, the Company sold approximately $22.1 million of Brazilian trade accounts receivable for $21.0 million. The proceeds of the transaction were used to maintain liquidity for working capital needs. The Company is contingently liable for up to 20% of the sale balance up to $4.1 million if the banks are unable to collect on these accounts.

During 2019, the Company sold approximately $16.4 million of trade accounts receivable for $15.6 million. The proceeds of these transactions were used to refinance Brazilian loans (see Note 10). The Company is contingently liable for up to 20% of the sale balance up to $2.7 million if the banks are unable to collect on these accounts. During 2018, the Company sold approximately $32.7 million of trade accounts receivable for $30.4 million. The Company does not believe the amount which may ultimately be payable for any unpaid receivables to be material to its consolidated financial statements. The Company has no further involvement with these accounts.

h. Inventories:

Inventories are stated at the lower of cost or net realizable value. Finished goods and raw material and supply costs are valued using the average cost method on a first-in-first-out basis. Raw materials and supply costs primarily consist of raw materials purchased to aid in the production of mineral and chemical products, maintenance materials and packaging materials. Finished goods are primarily comprised of salt, magnesium chloride, and plant nutrition and chemical products readily available for sale. Substantially all costs associated with the production of finished goods at the Company’s production locations are captured as inventory costs. As required by U.S. GAAP, a portion of the fixed costs at a location are not included in inventory and are expensed as a product cost if production at that location is determined to be abnormally low in any period. Additionally, since the Company’s products are often stored at third-party warehousing locations, the Company includes in the cost of inventory the freight and handling costs necessary to move the product to storage until the product is sold to a customer.

i. Other Current Assets:

In the fourth quarter of 2015, the Company began marketing certain assets used in farming operations. Management remains committed to sell these assets, and the assets continue to be marketed at a reasonable price. The Company has performed an impairment analysis and concluded that the fair market value of these assets exceeds their carrying value. These assets have been recorded in other current assets in the Consolidated Balance Sheets as of December 31, 2020 and 2019. The amounts classified as held for sale as of December 31, 2020 and 2019, of $6.8 million and $7.2 million, respectively, include water rights of approximately $5.2 million with the remaining balance consisting of property, plant and equipment. In February 2021, the Company completed the sale of the remaining assets and any gain or loss recognized is expected to be immaterial. In addition, other current assets as of December 31, 2020 and 2019, include $2.8 million and $58.3 million, respectively, of tax refunds from U.S. taxing authorities pursuant to the tax settlement with Canadian and U.S. tax authorities described in Note 8. The remaining other amounts included in other current assets as of December 31, 2020 and 2019, respectively, consist principally of prepaid expenses.

j. Property, Plant and Equipment:

Property, plant and equipment is stated at cost and includes capitalized interest. The costs of replacements or renewals, which improve or extend the life of existing property, are capitalized. Maintenance and repairs are expensed as incurred. Upon retirement or disposition of an asset, any resulting gain or loss is included in the Company’s operating results.

Property, plant and equipment also includes mineral interests. The mineral interests for the Company’s Winsford U.K. mine are owned. The Company leases probable mineral reserves at its Cote Blanche and Goderich mines, its Ogden facility and several of its other North American facilities. These leases have varying terms, and many provide for a royalty payment to the lessor based on a specific amount per ton of mineral extracted or as a percentage of sales. The Company’s rights to extract minerals are contractually limited by time. The Cote Blanche mine is operated under land and mineral leases, and the mineral lease expires in 2060 with two additional 25-year renewal periods. The Goderich mine mineral reserve lease expires in 2022

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with the Company’s option to renew until 2043 after demonstrating to the lessor that the mine’s useful life is greater than the lease’s term. The Ogden facility mineral reserve lease renews annually. The Company believes it will be able to continue to extend lease agreements as it has in the past, at commercially reasonable terms, without incurring substantial costs or material modifications to the existing lease terms and conditions, and therefore, management believes that assigned lives are appropriate. The Company’s mineral interests are depleted on a units-of-production basis based upon the latest available mineral study. The weighted average amortization period for the leased probable mineral reserves is 90 years as of December 31, 2020. The Company also owns other mineral properties. The weighted average life for the probable owned mineral reserves is 36 years as of December 31, 2020, based upon management’s current production estimates.

Buildings and structures are depreciated on a straight-line basis over lives generally ranging from 10 to 30 years. Portable buildings generally have shorter lives than permanent structures. Leasehold and building improvements typically have shorter estimated lives of 5 to 20 years or lower based on the life of the lease to which the improvement relates.

The Company’s fixed assets are amortized on a straight-line basis over their respective lives. The following table summarizes the estimated useful lives of the Company’s different classes of property, plant and equipment:

	Years
Land improvements	10 to 25
Buildings and structures	10 to 30
Leasehold and building improvements	2 to 40
Machinery and equipment – vehicles	2 to 10
Machinery and equipment – other mining and production	2 to 50
Office furniture and equipment	2 to 10
Mineral interests	20 to 99

The Company has finance leases which are recorded in property, plant and equipment at the beginning of the lease at the lower of the fair value of the leased property or the present value of the minimum lease payments. Lease payments are recorded as interest expense and a reduction of the lease liability. A finance lease asset is depreciated over the lower of its useful life or the lease term.

The Company has capitalized computer software costs of $13.4 million and $16.0 million as of December 31, 2020 and 2019, respectively, recorded in property, plant and equipment. The capitalized costs are being amortized over five years. The Company recorded $5.8 million, $6.6 million and $7.3 million of amortization expense related to capitalized computer software for 2020, 2019 and 2018, respectively.

The Company recognizes and measures obligations related to the retirement of tangible long-lived assets in accordance with applicable U.S. GAAP. Asset retirement obligations are not material to the Company’s consolidated financial position, results of operations or cash flows.

The Company reviews its long-lived assets and the related mineral reserves for impairment whenever events or changes in circumstances indicate the carrying amounts of such assets may not be recoverable. If an indication of a potential impairment exists, recoverability of the respective assets is determined by comparing the forecasted undiscounted net cash flows of the operation to which the assets relate, to the carrying amount, including associated intangible assets, of such operation. If the operation is determined to be unable to recover the carrying amount of its assets, then intangible assets are written down first, followed by the other long-lived assets of the operation, to fair value. Fair value is determined based on discounted cash flows or appraised values, depending upon the nature of the assets.

 k. 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 adopted this guidance on January 1, 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 elected the 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. Refer to Note 4 for additional details.

l. Goodwill and Intangible Assets:

The Company amortizes its intangible assets deemed to have finite lives on a straight-line basis over their estimated useful lives which, for the Company, range from 4 to 50 years. The Company reviews goodwill and other indefinite-lived intangible

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assets annually for impairment. In addition, goodwill and other intangible assets are reviewed when an event or change in circumstances indicates the carrying amounts of such assets may not be recoverable.

m. 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. The Company may recognize its share of an investee’s earnings on a lag, if an investee’s financial results are not available in a timely manner.

The Company’s Brazilian subsidiary holds a 50% interest in Fermavi Eletroquímica Ltda. (“Fermavi”). Fermavi, which was founded in 1987, is a Brazilian corporation with headquarters in Varginha, Minas Gerais, Brazil, and its operations focus on the production and sale of manganese-based products. The Company’s investment in Fermavi was recorded at its estimated fair value in conjunction with the purchase price allocation as of the date the Company completed the full acquisition of Compass Minerals América do Sul Indústria e Comércio Ltda. (“Compass Minerals South America”), which was in excess of the book value of net assets acquired. This basis difference was approximately $2 million and $4 million as of December 31, 2020 and 2019, respectively. The portion of the basis differences related to tangible and intangible assets is amortized over their remaining useful lives, as appropriate. The Company accounts for its investment in Fermavi under the equity method of accounting.

n. Other Noncurrent Assets:

Other noncurrent assets include certain inventories of spare parts and related inventory, net of reserve, of $27.9 million and $31.0 million at December 31, 2020 and 2019, respectively, which will be utilized with respect to long-lived assets. As of December 31, 2020 and 2019, other noncurrent assets also include net operating lease assets of $55.6 million and $53.7 million, respectively.

The Company sponsors a non-qualified defined contribution plan for certain of its executive officers and key employees as described in Note 9. As of December 31, 2020 and 2019, investments in marketable securities representing amounts deferred by employees, Company contributions and unrealized gains or losses totaling $1.9 million and $1.4 million, respectively, were included in other noncurrent assets in the Consolidated Balance Sheets. The marketable securities are classified as trading securities and accordingly, gains and losses are recorded as a component of other expense (income), net in the Consolidated Statements of Operations.

o. Income Taxes:

The Company accounts for income taxes using the liability method in accordance with the provisions of GAAP. Under the liability method, deferred taxes are determined based on the differences between the consolidated financial statements and the tax basis of assets and liabilities using enacted tax rates in effect in the years in which the differences are expected to reverse. The Company’s foreign subsidiaries file separate company returns in their respective jurisdictions.

The Company recognizes potential liabilities in accordance with applicable GAAP for anticipated tax issues in the U.S. and other tax jurisdictions based on its estimate of whether, and the extent to which, additional taxes will be due. If payment of these amounts ultimately proves to be unnecessary, the reversal of the liabilities would result in tax benefits being recognized in the period when the Company determines the liabilities are no longer necessary. If the Company’s estimate of tax liabilities proves to be less than the ultimate assessment, a further charge to expense would result. Any penalties and interest that are accrued on the Company’s uncertain tax positions are included as a component of income tax expense.

In evaluating the Company’s ability to realize deferred tax assets, the Company considers the sources and timing of taxable income, including the reversal of existing temporary differences, the ability to carryback tax attributes to prior periods, qualifying tax-planning strategies, and estimates of future taxable income exclusive of reversing temporary differences. In determining future taxable income, the Company’s assumptions include the amount of pre-tax operating income according to different state, federal and international taxing jurisdictions, the origination of future temporary differences, and the implementation of feasible and prudent tax-planning strategies.

If the Company determines that a portion of its deferred tax assets will not be realized, a valuation allowance is recorded in the period that such determination is made. In the future, if the Company determines, based on the existence of sufficient evidence, that more or less of the deferred tax assets are more likely than not to be realized, an adjustment to the valuation allowance will be made in the period such a determination is made.

As discussed in Note 8, on December 22, 2017, the U.S. enacted the Tax Cuts and Jobs Act (the “Act”) which subjects U.S. shareholders, including the Company, to tax on Global Intangible Low-Taxed Income (“GILTI”) earned by certain foreign subsidiaries. The FASB issued guidance stating that an entity can make an accounting policy election to either recognize deferred taxes for temporary basis differences expected to reverse as GILTI in future years or to provide for the tax expense related to GILTI in the year the tax is incurred as a period expense only. The Company has elected to account for GILTI as a period expense only.

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p. Environmental Costs:

Environmental costs, other than those of a capital nature, are accrued at the time the exposure becomes known and costs can be reasonably estimated. Costs are accrued based upon management’s estimates of all direct costs. Amounts reserved for environmental matters were not material at December 31, 2020 or 2019.

q. Equity Compensation Plans:

The Company has equity compensation plans under the oversight of the Company’s Board of Directors, whereby stock options, restricted stock units, performance stock units, deferred stock units and shares of common stock are granted to the Company’s employees and directors. See Note 13 for additional discussion.

r. Earnings per Share:

When calculating earnings per share, the Company’s participating securities are accounted for under the two-class method. The two-class method requires allocating the Company’s net earnings to both common shares and participating securities based upon their rights to receive dividends. Basic earnings per share is computed by dividing net earnings available to common stockholders by the weighted-average number of outstanding common shares during the period. Diluted earnings per share reflects the potential dilution that could occur under the more dilutive of either the treasury stock method or the two-class method for calculating the weighted-average number of outstanding common shares. The treasury stock method is calculated assuming unrecognized compensation expense, income tax benefits and proceeds from the potential exercise of employee stock options are used to repurchase common stock.

s. Derivatives:

The Company is exposed to the impact of fluctuations in foreign exchange and interest rates on its borrowings and fluctuations in the purchase price of natural gas consumed in operations. The Company hedges portions of these risks through the use of derivative agreements.

The Company records derivative financial instruments as assets or liabilities measured at fair value. Accounting for the changes in the fair value of a derivative depends on its designation and effectiveness. 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. For qualifying hedges, the effective portion of 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 Consolidated Statements of Operations. Until the effective portion of a derivative’s change in fair value is recognized in the Consolidated Statements of Operations, the change in fair value is recognized in other comprehensive income. For derivative instruments that are not accounted for as hedges, or for the ineffective portions of qualifying hedges, the change in fair value is recorded through earnings in the period of change. The Company formally documents, designates and assesses the effectiveness of transactions that receive hedge accounting treatment initially and on an ongoing basis.

t. Concentration of Credit Risk:

The Company sells its salt and magnesium chloride products to various governmental agencies, manufacturers, distributors and retailers primarily in the Midwestern U.S. and throughout Canada and the U.K. The Company’s plant nutrition products are sold across the Western Hemisphere and globally. No single customer or group of affiliated customers accounted for more than 10% of the Company’s sales in any year during the three-year period ended December 31, 2020, or more than 10% of receivables at December 31, 2020 or 2019.

u. Recent Accounting Pronouncements:

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 adoption of this guidance on January 1, 2020, did not have an impact on the Company’s consolidated financial statements.

On January 1, 2020, the Company adopted guidance issued by the FASB related to credit losses for financial instruments, which replaces the incurred loss methodology with a current expected credit loss methodology (“CECL”). The Company has determined that its receivables are the only financial instrument that is within scope of this CECL guidance. The CECL methodology requires financial assets to be recorded at the net amount expected to be collected over the lifetime of the asset such that the estimated losses are accrued on the day the asset is acquired. The CECL methodology also requires financial assets to be aggregated and evaluated within pools with similar risk characteristics.

The Company has recorded an allowance on its receivables based on historical loss rates modified to consider supportable forecasts related to customer-specific and macroeconomic factors. For instance, the Company’s 2020 allowance for doubtful

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accounts considered the potential impact that the COVID-19 pandemic could have on the collectability of its outstanding receivables. The Company’s customer pools are comprised of North American highway deicing customers, U.K. highway deicing customers, U.K. storage customers, North American consumer and industrial customers, Plant Nutrition North America customers, Plant Nutrition South America customers and customers whose outstanding receivable balances have been sent to collections or put on a payment plan. Customers grouped within these pools have similar risk characteristics. The Company’s allowance for doubtful accounts consists of estimates of expected credit losses and accruals for returns and allowances. At the transition date of January 1, 2020, the implementation of CECL had an immaterial impact of less than $0.1 million on the Company’s consolidated financial statements. Under CECL, the Company had an allowance for doubtful accounts of $9.4 million and $11.1 million as of January 1, 2020, and December 31, 2020, respectively.

3.    REVENUES

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 magnesium chloride for agricultural purposes 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 has made an accounting policy election to recognize any 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. As a practical expedient, 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.

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Practical Expedients and Accounting Policy Elections

Upon adoption of the guidance, the Company elected (i) to exclude disclosures of transaction prices allocated to remaining performance obligations when the Company recognized such revenue for all periods prior to the date of initial application of the new guidance, (ii) not to adjust the amount of consideration for the effects of a significant financing component when the Company expects, at contract inception, that the period between the Company's transfer of a product or service to a customer and when the customer pays for that product or service will be one year or less, (iii) to expense costs to obtain a contract as incurred for costs when the Company expects that the amortization period would have been one year or less, (iv) not to recast revenue for customer contracts that begin and end in the same fiscal period, and (v) not to assess whether promised goods or services are performance obligations if they are immaterial in the context of the customer contract.

See Note 15 for disaggregation of sales by segment, type and geographical region.

4.     LEASES

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 lives 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 non-lease 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	December 31, 2020		December 31, 2019
Assets
Operating lease assets	Other assets	$	55.6	$	53.7
Finance lease assets	Property, plant and equipment, net	7.2		5.8
Total lease assets		$	62.8	$	59.5
Liabilities
Current liabilities:
Operating	Accrued expenses and other current liabilities	$	14.8	$	12.8
Finance	Accrued expenses and other current liabilities	1.3		1.1
Noncurrent liabilities:
Operating	Other noncurrent liabilities	42.8		41.0
Finance	Other noncurrent liabilities	7.0		6.2
Total lease liabilities		$	65.9	$	61.1

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

	Year Ended December 31, 2020		Year Ended December 31, 2019
Finance lease cost:
Amortization of lease assets	$	1.8	$	1.1
Interest on lease liabilities	0.6		0.6
Operating lease cost	17.4		19.2
Variable lease cost(a)	11.7		18.8
Total lease cost	$	31.5	$	39.7

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

Maturities of lease liabilities are as follows (in millions):

	Operating Leases		Finance Leases		Total
2021	$	16.4	$	1.8	$	18.2
2022	13.1		1.2		14.3
2023	8.4		1.1		9.5
2024	5.7		0.9		6.6
2025	4.9		0.9		5.8
After 2025	18.0		6.1		24.1
Total lease payments	66.5		12.0		78.5
Less: Interest	(8.9)		(3.7)		(12.6)
Present value of lease liabilities	$	57.6	$	8.3	$	65.9

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

	December 31, 2020		December 31, 2019
Weighted-average remaining lease term (years)
Operating leases	7.0		7.7
Finance leases	9.3		7.2
Weighted-average discount rate
Operating leases	3.7	%	4.3	%
Finance leases	7.3	%	7.6	%

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

	Year Ended December 31, 2020		Year Ended December 31, 2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$	15.3	$	18.9
Operating cash flows from finance leases	0.6		0.6
Financing cash flows from finance leases	1.8		1.3
Leased assets obtained in exchange for new operating lease liabilities	16.5		20.3
Leased assets obtained in exchange for new finance lease liabilities	3.8		0.2

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5.    INVENTORIES

Inventories consist of the following at December 31 (in millions):

	2020		2019
Finished goods	$	287.4	$	235.3
Raw materials and supplies	83.2		76.2
Total inventories	$	370.6	$	311.5

Based on the nature of the Company’s inventories, and specifically related to bulk SOP stockpiles, certain estimates are required to measure the amount of inventories at any point in time. During the third quarter of 2020, the Company identified an error in the valuation of its bulk SOP stockpile inventory at its Ogden facility when one of its stockpiles was largely depleted, which resulted in an estimated overstatement of inventories of approximately $7.4 million. The Company evaluated the error and believes it is not material to any previous period and has therefore recorded this additional expense to product cost within its Plant Nutrition North America segment during 2020.

6.    PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment consists of the following at December 31 (in millions):

	2020		2019
Land, buildings and structures and leasehold improvements	$	626.8	$	596.0
Machinery and equipment	1,085.1		1,001.9
Office furniture and equipment	53.3		60.7
Mineral interests	172.4		171.1
Construction in progress	58.7		141.3
	1,996.3		1,971.0
Less accumulated depreciation and depletion	(1,031.4)		(940.2)
Property, plant and equipment, net	$	964.9	$	1,030.8

The cost of leased property, plant and equipment under finance leases included above was $11.2 million and $9.2 million with accumulated depreciation of $4.0 million and $3.4 million as of December 31, 2020 and 2019, respectively.

7.    GOODWILL AND OTHER INTANGIBLE ASSETS

The asset value and accumulated amortization as of December 31, 2020 and 2019 for the finite-lived intangibles assets are as follows (in millions):

	Supply Agreement		SOP Production Rights		Customer/Distributor Relationships		Lease Rights		Trade Names		Developed Technologies		Patents		Other		Total
December 31, 2020
Gross intangible asset	$	28.5	$	24.3	$	11.6	$	1.8	$	30.3	$	26.2	$	16.2	$	1.3	$	140.2
Accumulated amortization	(5.7)		(16.6)		(6.8)		(0.6)		(11.8)		(21.4)		(9.6)		(1.0)		(73.5)
Net intangible assets	$	22.8	$	7.7	$	4.8	$	1.2	$	18.5	$	4.8	$	6.6	$	0.3	$	66.7

	Supply Agreement		SOP Production Rights		Customer/Distributor Relationships		Lease Rights		Trade Names		Developed Technologies		Patents		Other		Total
December 31, 2019
Gross intangible asset	$	27.9	$	24.3	$	12.7	$	1.7	$	36.8	$	32.8	$	16.0	$	1.3	$	153.5
Accumulated amortization	(5.0)		(15.6)		(6.1)		(0.5)		(10.9)		(21.7)		(8.1)		(0.9)		(68.8)
Net intangible assets	$	22.9	$	8.7	$	6.6	$	1.2	$	25.9	$	11.1	$	7.9	$	0.4	$	84.7

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The estimated lives of the Company’s finite-lived intangible assets are as follows:

Intangible asset	Estimated Lives
Supply agreement	50 years
SOP production rights	25 years
Patents	10-20 years
Developed technology	4-7 years
Lease rights	25 years
Customer and distributor relationships	10-14 years
Trademarks	10 years
Trade names	10-11 years

None of the finite-lived intangible assets have a residual value. Aggregate amortization expense was $10.7 million in 2020, $13.6 million in 2019 and $15.0 million in 2018 and is projected to be between $5 million and $10 million per year over the next five years. The weighted average life for the Company’s finite-lived intangibles is 20 years.

In addition, the Company had water rights of $17.7 million as of December 31, 2020 and 2019, and trade names of $0.6 million as of December 31, 2020 and 2019, which have indefinite lives.

The Company has goodwill of $281.3 million and $343.0 million as of December 31, 2020 and 2019, respectively, in its Consolidated Balance Sheets. The Company has recorded goodwill of $56.4 million and $55.4 million as of December 31, 2020 and 2019, respectively, in its Plant Nutrition North America segment. Additionally, the Company has recorded goodwill of $218.8 million and $281.6 million as of December 31, 2020 and 2019, respectively, in its Plant Nutrition South America segment. The remaining amounts in both periods were immaterial and recorded in its corporate and other and Salt segment. The decrease in the balance of goodwill from December 31, 2019, was due to changes in foreign currency exchange rates.

8.    INCOME TAXES

The Company files tax returns in the U.S., Canada, Brazil and the U.K. at the federal and local taxing jurisdictional levels. The Company’s U.S. federal tax returns for tax years 2017 forward remain open and subject to examination. Generally, the Company’s state, local and foreign tax returns for years as early as 2002 forward remain open and subject to examination, depending on the jurisdiction.

Tax Cuts and Jobs Act

On December 22, 2017, the U.S. enacted the Act (which is commonly referred to as “U.S. tax reform”). The Act significantly changes U.S. corporate income tax laws by reducing the U.S. corporate income tax rate to 21% beginning in 2018 and creating a quasi-territorial tax system with a one-time mandatory tax on previously deferred foreign earnings. As of December 31, 2018, the Company has completed its accounting for the tax effects of enactment of the Act. In 2017, the Company recorded a reasonable estimated net charge of $46.8 million, consisting of $55.2 million related to the one-time mandatory tax on unremitted foreign earnings, offset by an $8.4 million benefit related to the remeasurement of the Company’s deferred tax liabilities at the new income tax rate. During 2018, the Company finalized the accounting for the enactment of the Act and recorded a tax benefit of $3.0 million, consisting of a $3.1 million tax benefit related to the one-time mandatory tax on unremitted foreign earnings offset by a $0.1 million charge related to the remeasurement of the Company’s deferred tax liabilities. The 2018 tax effects of the Act are included in income tax expense in the Company’s Consolidated Statements of Operations.

Although the unremitted foreign earnings subjected to the one-time mandatory tax on unremitted foreign earnings would not be subject to additional U.S. federal income tax, the Company must still account for the tax consequences of outside basis differences and other tax impacts of its investments in non-U.S. subsidiaries. As such, the Company revised its permanently reinvested assertion and now expects to repatriate approximately $150 million of unremitted foreign earnings on which $4.3 million of income tax expense has been recorded for foreign withholding tax and state income taxes, consisting of $0.9 million recorded in 2019 and $3.4 million recorded in 2018. All remaining unremitted earnings of non-U.S. subsidiaries and outside basis differences are considered permanently reinvested.

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The following table summarizes the Company’s income tax provision for the years ended December 31 (in millions):

	2020		2019		2018
Current:
Federal	$	(22.3)	$	5.3	$	8.1
State	0.4		2.0		4.3
Foreign	28.2		26.6		13.1
Total current	6.3		33.9		25.5
Deferred:
Federal	1.2		(7.2)		(8.6)
State	(1.2)		(1.9)		(0.5)
Foreign	5.4		(2.7)		(7.6)
Total deferred	5.4		(11.8)		(16.7)
Total provision for income taxes	$	11.7	$	22.1	$	8.8

The following table summarizes components of earnings before income taxes and shows the tax effects of significant adjustments from the expected income tax expense computed at the federal statutory rate for the years ended December 31 (in millions):

	2020			2019			2018
U.S. (loss) income	$	(4.1)		$	31.7		$	(80.6)
Foreign income	75.3			52.9			158.2
Earnings before income taxes	$	71.2		$	84.6		$	77.6
Computed tax at the U.S. federal statutory rate of 21%	15.0			17.8			16.3
Foreign income rate differential, mining, and withholding taxes, net of U.S. federal deduction	9.3			10.2			0.9
Percentage depletion in excess of basis	(4.4)			(5.8)			(4.7)
Other domestic tax reserves, net of reversals	(9.7)			0.2			1.5
State income taxes, net of federal income tax benefit	(0.9)			—			2.1
Change in valuation allowance on deferred tax asset	2.4			0.2			(5.7)
Interest expense recognition differences	(3.5)			(3.5)			(3.6)
GILTI	3.8			1.0			1.0
Tax Cuts and Jobs Act of 2017	—			1.6			(3.0)
Tax on repatriated amounts	—			0.9			3.4
Transfer pricing settlement with taxing authorities	—			—			2.2
Other, net	(0.3)			(0.5)			(1.6)
Provision for income taxes	$	11.7		$	22.1		$	8.8
Effective tax rate	16		%	26		%	11		%

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Under U.S. GAAP, deferred tax assets and liabilities are recognized for the estimated future tax effects, based on enacted tax law, of temporary differences between the values of assets and liabilities recorded for financial reporting and tax purposes, and of net operating losses and other carryforwards. The significant components of the Company’s deferred tax assets and liabilities were as follows at December 31 (in millions):

	2020		2019
Deferred tax assets:
Reluz Nordeste Indústria e Comércio Ltda net operating loss carryforwards	$	0.4	$	0.6
Compass Minerals South America net operating loss carryforwards	—		3.3
Excess interest expense	9.9		14.9
Foreign tax credit	39.4		38.1
Right of use lease liability	11.3		11.1
Stock-based compensation	2.0		2.3
Other, net	20.5		16.5
Total deferred tax assets before valuation allowance	83.5		86.8
Valuation allowance	(42.0)		(39.8)
Total deferred tax assets	41.5		47.0
Deferred tax liabilities to be netted with deferred tax assets:
Property, plant and equipment	17.2		21.2
Right of use lease asset	11.3		11.1
Other, net	1.4		1.0
Total deferred tax liabilities to be netted with deferred tax assets	29.9		33.3
Net noncurrent deferred tax assets	$	11.6	$	13.7
Deferred tax assets to be netted with deferred tax liabilities:
Net operating loss carryforwards	$	1.7	$	2.2
Right of use lease liability	1.9		0.9
Other, net	0.9		2.1
Total deferred tax assets before valuation allowance	4.5		5.2
Valuation allowance	(1.4)		(1.4)
Total deferred tax assets to be netted with deferred tax liabilities	3.1		3.8
Deferred tax liabilities:
Property, plant and equipment	66.5		63.7
Intangible asset	22.2		29.1
Right of use lease asset	1.9		0.9
Total deferred tax liabilities	90.6		93.7
Net deferred tax liabilities	$	87.5	$	89.9

At December 31, 2020 and 2019, the Company had $7.7 million and $18.8 million, respectively, of gross foreign federal net operating loss (“NOL”) carryforwards that have no expiration date, $0.1 million and $1.7 million, respectively, of gross foreign federal NOL carryforwards which expire in 2033 and $0.2 million and $0.3 million, respectively, of net operating tax-effected state NOL carryforwards which will expire beginning in 2027.

The Company has recorded a valuation allowance for a portion of its deferred tax asset relating to various tax attributes that it does not believe are, more likely than not to be realized. During 2018, the Company determined it is more likely than not that all of its Brazilian deferred tax assets acquired in connection with the acquisition of Compass Minerals South America will be used to reduce taxable income. As a result, the Company released the remaining $7.2 million of valuation allowances during the year ending December 31, 2018. As of December 31, 2020 and 2019, the Company’s valuation allowance was $43.4 million and $41.2 million, respectively. In the future, if the Company determines, based on existence of sufficient evidence, that it should realize more or less of its deferred tax assets, an adjustment to the valuation allowance will be made in the period such a determination is made.

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The calculation of the Company’s tax liabilities involves dealing with uncertainties in the application of complex tax regulations in multiple jurisdictions. The Company recognizes potential liabilities for unrecognized tax benefits in the U.S. and other tax jurisdictions in accordance with applicable U.S. GAAP, which requires uncertain tax positions to be recognized only if they are more likely than not to be upheld based on their technical merits. The measurement of the uncertain tax position is based on the largest benefit amount that is more likely than not (determined on a cumulative probability basis) to be realized upon settlement of the matter. If payment of these amounts ultimately proves to be unnecessary, the reversal of the liabilities would result in tax benefits being recognized in the period when the Company determines the liabilities are no longer necessary. If the Company’s estimate of tax liabilities proves to be less than the ultimate assessment, a further charge to expense may result.

The Company’s uncertain tax positions primarily relate to transactions and deductions involving U.S., Canadian and Brazilian operations. If favorably resolved, $28.8 million of unrecognized tax benefits would decrease the Company’s effective tax rate. Management believes that it is reasonably possible that unrecognized tax benefits will decrease by approximately $1.1 million in the next twelve months largely as a result of tax returns being closed to future audits. In 2020, the Company’s income tax expense included a benefit of approximately $11.0 million related to the release of uncertain tax positions due to the expiration of statutes of limitations.

The following table shows a reconciliation of the beginning and ending amount of unrecognized tax benefits (in millions):

	2020		2019		2018
Unrecognized tax benefits:
Balance at January 1	$	47.4	$	50.9	$	67.4
Additions resulting from current year tax positions	—		0.2		8.0
Additions relating to tax positions taken in prior years	1.4		4.5		2.6
Reductions due to settlements	—		—		(25.0)
Reductions due to cash payments	—		(7.5)		—
Reductions relating to tax positions taken in prior years	(0.1)		(0.4)		(0.3)
Reductions due to expiration of tax years	(10.4)		(0.3)		(1.8)
Balance at December 31	$	38.3	$	47.4	$	50.9

The Company accrues interest and penalties related to its uncertain tax positions within its tax provision. During the years ended December 31, 2020, 2019 and 2018, the Company accrued interest and penalties, net of reversals, of $2.0 million, $4.6 million and $(2.1) million, respectively. As of December 31, 2020 and 2019, accrued interest and penalties included in the Consolidated Balance Sheets totaled $22.3 million and $20.3 million, respectively.

The Company has historically considered the undistributed earnings of its foreign subsidiaries to be permanently reinvested. In December 2017, however, U.S. tax reform legislation was enacted, which included a one-time mandatory tax on previously deferred foreign earnings. As such, in 2018, the Company revised its permanently reinvested assertion and now expects to repatriate approximately $150 million of unremitted foreign earnings on which $4.3 million of income tax expense has been recorded for foreign withholding tax and state income taxes, consisting of $0.9 million recorded in 2019 and $3.4 million recorded in 2018. The Company intends to continue its permanently reinvested assertion on the remaining undistributed earnings of its foreign subsidiaries indefinitely. As of December 31, 2020, the Company has approximately $213.6 million of outside basis differences on which no deferred taxes have been recorded as the determination of the unrecognized deferred taxes is not practicable.

Canadian provincial tax authorities have challenged tax positions claimed by one of the Company’s Canadian subsidiaries and have issued tax reassessments for years 2002-2015. The reassessments are a result of ongoing audits and total approximately $153.4 million, including interest, through December 31, 2020. The Company disputes these reassessments and plans to 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 $120.1 million performance bond and has paid $39.0 million (most of which is recorded in other assets in the Consolidated Balance Sheets at December 31, 2020), which is necessary to proceed with future appeals or litigation.

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.

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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 December 31, 2020, 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.

Settlements

In 2017, the Company, the CRA and the IRS reached a settlement agreement on transfer pricing for its 2007-2012 tax years. As a result of this settlement, the Company recognized $13.8 million of income tax expense in the Consolidated Statement of Operations related to the Company’s Canadian tax positions for the years 2007-2016. The recording of this settlement resulted in increased sales for the Company’s Canadian subsidiary of $85.7 million and increased offsetting expenses for its U.S. subsidiary in 2017 causing a domestic loss and significant foreign income. During 2018, in accordance with the agreement, the Company’s U.S. subsidiary made intercompany cash payments of $85.7 million to its Canadian subsidiary and tax payments were made to Canadian taxing authorities of $17.5 million. Additional tax payments of $5.3 million were made during 2019 with the remaining liability of $1.4 million expected to be paid in 2021. Corresponding tax refunds of $22.2 million have been received as of December 31, 2020, from U.S. taxing authorities with the remaining refund of approximately $0.9 million expected in 2021 (recorded in other current assets in the Consolidated Balance Sheets). Additionally, the reassessed Canadian tax, penalties and interest for the Company for years 2007 and 2008 of approximately $34.2 million are effectively resolved.

In 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 income tax expense was previously recognized in 2017, however the recording of this settlement resulted in increased sales for the Company’s Canadian subsidiary of $106.1 million and offsetting expenses for its U.S. subsidiary in 2018 causing a domestic loss and significant foreign income. During 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 were made to Canadian taxing authorities of $29.9 million, with the remaining $1.4 million balance paid during 2020. Corresponding tax refunds of $59.7 million have been received as of December 31, 2020, from U.S. taxing authorities, with the remaining $1.9 million expected in 2021 (recorded in other current assets in the Consolidated Balance Sheets).

9.    PENSION PLANS AND OTHER BENEFITS

The Company has a defined benefit pension plan for certain of its U.K. employees. Benefits of this pension plan are based on a combination of years of service and compensation levels. This plan was closed to new participants in 1992. Beginning December 1, 2008, future benefits ceased to accrue for the remaining active employee participants in the pension plan concurrent with the establishment of a defined contribution plan for these employees. In addition, the Company has a defined benefit plan with certain Compass Minerals South America employees. The pension assets, obligations and net pension expense related to this plan are immaterial.

The Company’s U.K. pension plan investment strategy is to maximize return on investments while minimizing risk. This is accomplished by investing in high-grade equity and debt securities. The Company’s portfolio guidelines recommend that equity securities comprise approximately 75% of the total portfolio and that approximately 25% be invested in debt securities. The Company’s portfolio has shifted to a smaller proportion of equity funds due to the increased volatility of these funds over the last several years, and it is researching strategies that will reduce volatility, while also maximizing returns. Investment strategies and portfolio allocations are based on the U.K. pension plan’s benefit obligations and its funded or underfunded status, expected returns, and the Company’s portfolio guidelines and are monitored on a regular basis. The weighted-average asset allocations by asset category are as follows:

	Plan Assets at December 31,
Asset Category	2020		2019
Cash and cash equivalents	2	%	3	%
Blended funds	48	%	51	%
Bond funds	50	%	46	%
Total	100	%	100	%

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The fair value of the Company’s U.K. pension plan assets at December 31, 2020 and 2019, by asset category (see Note 14 for a discussion regarding fair value measurements) are as follows (in millions):

	December 31, 2020		Level One		Level Two		Level Three
Asset category:
Cash and cash equivalents(a)	$	1.3	$	1.3	$	—	$	—
Blended funds(b)	34.9		—		34.9		—
Bond funds(c):
Treasuries	35.9		—		35.9		—
Total Pension Assets	$	72.1	$	1.3	$	70.8	$	—

	December 31, 2019		Level One		Level Two		Level Three
Asset category:
Cash and cash equivalents(a)	$	1.9	$	1.9	$	—	$	—
Blended funds(b)	33.6		—		33.6		—
Bond funds(c):
Treasuries	30.1		—		30.1		—
Total Pension Assets	$	65.6	$	1.9	$	63.7	$	—

(a)The fair value of cash and cash equivalents is its carrying value.

(b)The Company is invested in a diversified growth fund. The diversified growth fund is valued at the last traded or official close for the underlying equities and bid or mid for the underlying fixed income securities depending on the portfolio benchmark. Where representative prices are unavailable, underlying fixed income investments are valued based on other observable market-based inputs.

(c)This category includes investments in investment-grade fixed-income instruments and funds linked to U.K. treasury notes. The funds are valued using the bid amounts for each fund. All of the Company’s bond fund pension assets are invested in U.K.-linked treasuries as of December 31, 2020 and 2019.

As of December 31, 2020 and 2019, amounts recognized in accumulated other comprehensive loss, net of tax, consisted of actuarial net losses of $9.4 million (including $10.4 million of accumulated loss less prior service cost of $1.0 million) and $6.8 million (including $7.9 million of accumulated loss less prior service cost of $1.1 million), respectively. During 2020, the amounts recognized in accumulated other comprehensive loss, net of tax, consisted of actuarial net losses of $(2.9) million, amortization of loss of $0.8 million, amortization of prior service cost of $(0.1) million and foreign exchange of $(0.3) million.

During 2019, the amounts recognized in accumulated other comprehensive loss, net of tax, consisted of actuarial net losses of $(2.4) million, amortization of loss of $0.4 million, amortization of prior service cost of $(0.1) million and foreign exchange of $(0.3) million. 

During 2018, the amounts recognized in accumulated other comprehensive loss, net of tax, consisted of actuarial net losses of $(1.2) million, amortization of loss of $0.3 million, amortization of prior service cost of $(0.1) million and foreign exchange of $0.4 million. The Company expects to recognize approximately $1.4 million ($1.5 million of amortization of loss less $0.1 million of prior service cost) of losses from accumulated other comprehensive loss as a component of net periodic pension cost in 2021. Total net periodic pension cost in 2021 is expected to be $0.1 million.

The assumptions used in determining pension information for the U.K. pension plan for the years ended December 31 were as follows:

	2020		2019		2018
Discount rate	1.20	%	2.00	%	2.90	%
Expected return on plan assets	3.10	%	3.10	%	3.70	%

The overall expected long-term rate of return on plan assets is a weighted-average expectation based on the fair value of targeted and expected portfolio composition. The Company considers historical performance and current benchmarks to arrive at expected long-term rates of return in each asset category. The Company determines its discount rate based on a forward yield curve for a portfolio of high-credit-quality bonds with expected cash flows and an average duration closely matching the expected benefit payments under the plan.

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The Company’s funding policy is to make the minimum annual contributions required by applicable regulations or agreements with the plan administrator. Management expects there will be no contributions during 2021. In addition, the Company may periodically make contributions to the plan based upon the underfunded status of the plan or other transactions, which warrant incremental contributions in the judgment of management.

The U.K. pension plan includes a provision whereby supplemental benefits may be available to participants under certain circumstances after case review and approval by the plan trustees. Because instances of this type of benefit have historically been infrequent, the development of the projected benefit obligation and net periodic pension cost (benefit) has not provided for any future supplemental benefits. If additional benefits are approved by the trustees, it is likely that an additional contribution would be required and the amount of incremental benefits would be expensed by the Company.

The Company expects to pay the following benefit payments (in millions):

Calendar Year	Future Expected Benefit Payments
2021	$	3.2
2022	3.2
2023	3.3
2024	3.4
2025	3.4
2026-2030	18.4

The following table sets forth pension obligations and plan assets for the Company’s U.K. pension plan, as of December 31 (in millions):

	2020		2019
Change in benefit obligation:
Benefit obligation as of January 1	$	64.1	$	58.6
Interest cost	1.2		1.7
Actuarial loss	8.3		4.8
Plan amendment	0.1		—
Benefits paid	(2.9)		(3.5)
Currency fluctuation adjustment	2.5		2.5
Benefit obligation as of December 31	73.3		64.1
Change in plan assets:
Fair value as of January 1	65.6		60.7
Actual return	6.7		4.2
Company contributions	0.4		1.7
Currency fluctuation adjustment	2.3		2.5
Benefits paid	(2.9)		(3.5)
Fair value of plan assets as of December 31	72.1		65.6
(Underfunded) Overfunded status of the plan	$	(1.2)	$	1.5

The Company’s U.K. pension plan was underfunded as of December 31, 2020, and overfunded as of December 31, 2019, and accordingly, $1.2 million and $1.5 million has been recorded as a noncurrent liability and a noncurrent asset, respectively, in the Company’s Consolidated Balance Sheets. The accumulated benefit obligation for the U.K. pension plan was $73.3 million and $64.1 million as of December 31, 2020 and 2019, respectively. The plan assets were less than the accumulated benefit obligation as of December 31, 2020, but were in excess of the accumulated benefit obligation as of December 31, 2019. The vested benefit obligation is the actuarial present value of the vested benefits to which the employee is currently entitled but based on the employee’s expected date of retirement. Since all employees are vested, the accumulated benefit obligation and the vested benefit obligation are the same amount.

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The Company uses a straight-line methodology of amortization subject to a corridor based upon the higher of the fair value of assets and the pension benefit obligation over a five-year period. The components of net periodic pension cost (benefit) were as follows for the years ended December 31 (in millions):

	2020		2019		2018
Interest cost on projected benefit obligation	$	1.2	$	1.7	$	1.6
Prior service cost	(0.1)		(0.1)		(0.1)
Expected return on plan assets	(1.9)		(2.2)		(2.5)
Plan amendment	0.1		—		—
Net amortization	1.0		0.5		0.3
Net periodic pension cost (benefit)	$	0.3	$	(0.1)	$	(0.7)

The Company has defined contribution and pre-tax savings plans (the “Savings Plans”) for certain of its employees. Under each of the Savings Plans, participants are permitted to defer a portion of their compensation. Company matching contributions to the Savings Plans are based on a percentage of employee contributions. Additionally, certain of the Savings Plans have a profit-sharing feature for salaried and non-union hourly employees. The Company contribution to the profit-sharing feature is discretionary and based on the Company’s financial performance and other factors. Expense attributable to the Savings Plans was $12.5 million, $11.6 million and $12.6 million for the years ended December 31, 2020, 2019 and 2018, respectively.

The Savings Plans include a non-qualified plan for certain executive officers and other key employees who are limited in their ability to participate in qualified plans due to existing regulations. These employees are allowed to defer a portion of their compensation, upon which they will be entitled to receive Company contributions despite the limitations imposed by current U.S. regulations for qualified plans. The Company’s contributions to the Savings Plans include Company matching contributions based on a percentage of the employee’s deferred salary, discretionary profit sharing contributions and any investment income (loss) that would have been credited to their account had the contributions been made according to employee-designated investment specifications. Although not required to do so, the Company invests amounts equal to the salary deferrals, the corresponding Company matching contribution and discretionary profit sharing amounts according to the employee-designated investment specifications. As of December 31, 2020 and 2019, investments in marketable securities totaling $1.9 million and $1.4 million, respectively, were included in other noncurrent assets with a corresponding deferred compensation liability included in other noncurrent liabilities in the Consolidated Balance Sheets. Compensation expense recorded for the non-qualified plan was immaterial for each of the years ended December 31, 2020, 2019 and 2018, including amounts attributable to investment income, and was included in other, net in the Consolidated Statements of Operations.

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10.    LONG TERM DEBT

Long-term debt consists of the following at December 31 (in millions):

	2020		2019
4.875% Senior Notes due July 2024	$	250.0	$	250.0
Term Loan due January 2025	390.0		400.0
Revolving Credit Facility due January 2025	130.3		160.0
6.75% Senior Notes due December 2027	500.0		500.0
AR Securitization Facility expires June 2023	51.2		—
3.7% Banco Itaú loan due March 2020	—		15.4
Banco Santander loan due October 2020	—		16.2
Banco Itaú loan due February 2021	10.4		—
Banco Rabobank loan due July 2021	6.8		17.4
Banco BTG loan due July 2021	2.6		—
Banco Santander loan due September 2021	—		19.9
Banco do Brasil loan due September 2021	9.6		12.4
Banco Rabobank loan due September 2021	6.8		—
Banco BTG loan due October 2021	2.6		—
Banco Rabobank loan due November 2021	13.5		17.4
Banco Santander loan due December 2021	—		14.9
Banco BTG loan due January 2022	1.0		—
Banco Votorantim loan due February 2022	7.7		—
Banco Bradesco loan due February 2022	4.8		—
Banco Santander loan due March 2022	2.9		—
Banco BTG loan due April 2022	1.0		—
Banco BTG loan due July 2022	2.6		—
Banco Safra loan due October 2022	3.9		—
Banco Santander loan due October 2022	12.5		—
Financiadora de Estudos e Projetos loan due November 2023	4.1		7.2
	1,414.3		1,430.8
Less unamortized debt issuance costs	(12.9)		(14.8)
Total debt	1,401.4		1,416.0
Less current portion	(63.7)		(52.1)
Long-term debt	$	1,337.7	$	1,363.9

Credit Agreement

In November 2019, the Company entered into an agreement to amend and restate its credit agreement (the “2019 Credit Agreement”), which matures in January 2025. The 2019 Credit Agreement provides for senior secured financing consisting of a $400 million term loan facility and a $300 million revolving credit facility. The term loan is repayable in quarterly installments of interest and principal which began in March 2020 with principal payments equal to 2.5% per year during the first 2 years and 5% per year during the final 3 years. The Company may elect for the credit facility to bear interest at either an alternate base rate or an adjusted eurocurrency bank deposit rate plus, in each case, an interest rate margin, based upon a defined consolidated leverage ratio. The outstanding term loan can be prepaid at any time without penalty. Prior to the 2019 Credit Agreement, the Company’s credit agreement consisted of two senior secured term loans and a senior secured revolving credit facility which matured in July 2021. Interest on the Company’s borrowings under the previous outstanding credit agreement was variable based on either the LIBOR or a base rate (defined as the greater of a specified U.S. or Canadian prime lending rate or the federal funds effective rate, increased by 0.5%) plus a margin which was dependent upon the Company’s leverage ratio and the type of term loan borrowing. As of December 31, 2020, the weighted average interest rate was 2.2% on all borrowings outstanding under the 2019 Credit Agreement. Both credit agreements require the Company to maintain certain financial ratios, including a minimum interest coverage ratio and a maximum total leverage ratio.

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Under the current revolving credit facility, up to $40 million may be drawn in Canadian dollars and $10 million may be drawn in British pounds sterling. Additionally, the revolving credit facility includes a sub-limit for short-term letters of credit in an amount not to exceed $50 million. As of December 31, 2020, there was $130.3 million outstanding under the revolving credit facility, and, after deducting outstanding letters of credit totaling $12.5 million, the Company’s borrowing availability was $157.2 million. The Company incurs participation fees related to its outstanding letters of credit and commitment fees on its available borrowing capacity. The rates vary depending on the Company’s leverage ratio. Bank fees are not material.

In connection with the 2019 Credit Agreement, the Company paid $4.1 million of fees ($3.8 million was capitalized as deferred financing costs with $0.3 million recorded as an expense). The Company also wrote-off $0.3 million of previously capitalized deferred financing costs as part of this refinancing in 2019.

In December 2018, the Company entered into an amendment to its credit agreement, which eased restrictions in certain covenants contained in the agreement. In connection with this amendment, the Company paid fees totaling $1.4 million ($1.4 million was capitalized as deferred financing costs with less than $0.1 million recorded as an expense).

The Company’s 2019 Credit Agreement borrowings are secured by substantially all existing and future U.S. assets of the Company, the Goderich mine in Ontario, Canada, and capital stock of certain subsidiaries. As of December 31, 2020, the Company was in compliance with each of its covenants under the 2019 Credit Agreement.

Senior Notes

In November 2019, the Company also issued $500 million 6.75% Senior Notes due December 2027 (the “6.75% Notes”), which are subordinate to the 2019 Credit Agreement borrowings. The 6.75% Notes are unsecured obligations and are guaranteed by certain of the Company’s domestic subsidiaries. Interest on the 6.75% Notes is due semi-annually in June and December beginning in 2020. The 6.75% Notes are subordinated to all existing and future indebtedness. In connection with the 6.75% Notes, the Company paid $8.2 million of fees, all of which were capitalized as deferred financing costs.

The 4.875% Senior Notes due July 2024 (the “4.875% Notes”) are subordinate to the 2019 Credit Agreement borrowings. Interest on the 4.875% Notes is due annually in January and July. The 2019 Credit Agreement and the agreements governing the 4.875% Notes and the 6.75% Notes and other indebtedness contain covenants that limit the Company’s ability, among other things, to incur additional indebtedness or contingent obligations or grant liens; pay dividends or make distributions to stockholders; repurchase or redeem the Company’s stock; make investments or dispose of assets; prepay, or amend the terms of certain junior indebtedness; engage in sale and leaseback transactions; make changes to the Company’s organizational documents or fiscal periods; grant liens on the Company’s assets or make certain intercompany dividends, investments or asset transfers; enter into new lines of business; enter into transactions with the Company’s stockholders and affiliates; and acquire the assets of or merge or consolidate with other companies.

Other Debt

As of December 31, 2020, the Company had $92.8 million of loans related to Compass Minerals South America, which have maturity dates ranging from February 2021 through November 2023 and bear interest at rates of either a percentage of CDI, an overnight inter-bank lending rate in Brazil, or LIBOR plus a margin. A portion of the loans are denominated in U.S. dollars and a portion of the loans are denominated in Brazilian real, Compass Minerals South America’s functional currency. The Company has entered into foreign currency swap agreements in relation to some of these loans whereby the Company agreed to swap interest and principal payments on loans denominated in U.S. dollars for principal and interest payments denominated in Brazilian real (see Note 11 for further discussion).

In the first quarter of 2020, the Company entered into three loans totaling $20.0 million which mature between February 2021 and March 2022, respectively. Two of the loans were denominated in Brazilian real and one loan was denominated in euros. In connection with the loan denominated in euros, the Company entered into a swap to exchange principal and interest payments denominated in euros to Brazilian real (see Note 11). These loans bear interest ranging from 143% - 150% of CDI.

During the third quarter of 2020, the Company entered into six new loans totaling $15.1 million which mature between July 2021 and July 2022. These loans are denominated in Brazilian real and bear interest rates ranging from 200% - 204% of CDI. The liquidity created from these loans allowed the Company to prepay $15.4 million worth of existing loans with maturity date of September 2021.

During the fourth quarter of 2020, the Company entered into three new loans totaling $21.2 million which mature between February 2022 and October 2022. These loans are denominated in Brazilian real and bear interest rates ranging from 171% - 186% of CDI. The proceeds of the new loans were used to pay a loan that matured in October 2020 and a loan scheduled to mature in December 2021.

In the first quarter of 2019, the Company entered into two Brazilian real-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 real-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 fourth quarter of 2019, the Company entered into two Brazilian real-denominated loans totaling $27.3 million which mature in September and December 2021. These loans bear interest at 126% and 129% of CDI, respectively. The Company also refinanced a loan with

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Rabobank that expired during the fourth quarter of 2019 in the amount of $17.4 million with a new loan with the same principal that bears interest at 122% of CDI and matures in November 2021.

Securitization

On June 30, 2020, certain of the Company’s U.S. subsidiaries entered into a three-year committed revolving accounts receivable financing facility (the “AR Facility”) of up to $100.0 million with PNC Bank, National Association (“PNC”), as administrative agent and lender, and PNC Capital Markets, LLC, as structuring agent.

In connection with the AR Facility, two of the Company’s U.S. subsidiaries, from time to time, sell and contribute receivables and certain related assets to a special purposes entity and wholly-owned U.S. subsidiary of the Company (the “SPE”). The SPE finances its acquisition of the receivables by obtaining secured loans from PNC and the other lenders party to a receivables financing agreement. A U.S. subsidiary of the Company services the receivables on behalf of the SPE for a fee. In addition, the Company has agreed to guarantee the performance by its subsidiaries. The Company and its subsidiaries do not guarantee the loan principal or interest under the receivables financing agreement or the collectability of the receivables under the AR Facility. As of December 31, 2020, the Company received proceeds from the AR Facility in the amount of $51.2 million.

The purchase price for the sale of receivables consists of cash available to the SPE from loans under the AR Facility and from collections on previously sold receivables and, to the extent the SPE does not have funds available to pay the purchase price due on any day in cash, through an increase in the principal amount of a subordinated intercompany loan. The SPE pays monthly interest and fees with respect to amounts advanced by the lenders under the AR Facility.

The SPE’s sole business consists of the purchase or acceptance through capital contributions of the receivables and the subsequent granting of a security interest in these receivables and related rights to PNC on behalf of the lenders under the AR Facility. The SPE is a separate legal entity with its own separate creditors who will be entitled, upon its liquidation, to be satisfied out of the SPE’s assets prior to any assets or value in the SPE becoming available to the Company and the assets of the SPE are not available to pay creditors of the Company or any of its affiliates other than the SPE.

Future maturities of long-term debt for the years ending December 31, are as follows (in millions):

	Debt Maturity
2021	$	63.7
2022	57.8
2023	72.5
2024	270.0
2025	450.3
Thereafter	500.0
Total	$	1,414.3

11.    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. From time to time, the Company may enter into immaterial foreign exchange contracts to mitigate foreign exchange risk on its sales and accounts receivable. 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 effective portion of 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

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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 a change in natural gas prices impacts 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 December 31, 2020, the Company had entered into natural gas derivative instruments to hedge a portion of its natural gas purchase requirements through December 2022. As of December 31, 2020 and 2019, the Company had agreements in place to hedge forecasted natural gas purchases of 2.5 million and 2.8 million MMBtus, respectively. All natural gas derivative instruments held by the Company as of December 31, 2020 and 2019, qualified and were designated as cash flow hedges. As of December 31, 2020, the Company expects to reclassify from accumulated other comprehensive loss to earnings during the next twelve months $0.3 million of net gains on derivative instruments related to its natural gas hedges.

 Foreign Currency Swaps not Designated as Hedges

In March 2020, the Company entered into forward instruments to swap currency denominated in U.S. dollars to Canadian dollars for a future intercompany payment from a U.S. subsidiary to a Canadian subsidiary. These instruments matured in April 2020 with combined notional amounts of $89.9 million. The objective of the instruments was to mitigate the foreign currency fluctuation risk related to intercompany payments denominated in a currency other than U.S. dollars, the Company’s functional currency. The instrument was not designated as a hedge. When these agreements settled in April 2020, the Company recognized a foreign exchange loss of $3.1 million in its Consolidated Statements of Operations.

In February 2018, the Company entered into a forward instrument to swap currency denominated in Brazilian real 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 Compass Minerals South America’s functional currency. The instrument was not designated as a hedge. During 2018, the Company recognized a net gain of $1.5 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 receivables 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 receivables and accounts payable denominated in a currency other than Compass Minerals South America’s functional currency. These forward contracts were not designated as hedges and matured in December 2018. During 2018, the Company recognized a net loss of $1.0 million in other expense in its Consolidated Statements of Operations for these forward contracts.

From time to time, the Company’s Brazilian subsidiary may enter into forward instruments to swap currency for sales invoices that are denominated in Brazilian real. These instruments are not material to the Company’s consolidated financial statements.

Foreign Currency Swaps Designated as Hedges

The Company has entered into euro-denominated debt instruments to provide funds for its operations in Brazil (see Note 10 for more information). The Company may also concurrently enter into foreign currency agreements whereby the Company agrees to swap interest and principal payments on loans denominated in euros for principal and interest payments denominated in Brazilian real, its South American 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 South American subsidiary’s functional currency. As of both December 31, 2020 and 2019, the Company had one swap agreement in place to hedge $10.5 million and $15.7 million, respectively, of loans denominated in a currency other than its South American subsidiary’s functional currency. Payments on the December 31, 2020, loan are due on various dates extending through February 2021, while payments on the December 31, 2019, loan were due on various dates extending through March 2020. As of both December 31, 2020 and 2019, the foreign currency derivative instrument qualified and was designated as a cash flow hedge. As of December 31, 2020, the Company expects to reclassify from accumulated other comprehensive loss to earnings during the next twelve months $2.6 million of net gains on derivative instruments related to this foreign currency swap agreement.

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The following tables present the fair value of the Company’s derivatives as of December 31, 2020 and 2019 (in millions):

	Asset Derivatives			Liability Derivatives
Derivatives designated as hedging instruments:	Consolidated Balance Sheet Location	December 31, 2020		Consolidated Balance Sheet Location	December 31, 2020
Commodity contracts	Other current assets	$	0.4	Accrued expenses and other current liabilities	$	0.1
Commodity contracts	Other assets	0.1		Other noncurrent liabilities	0.2
Swap contracts	Other current assets	2.6		Accrued expenses and other current liabilities	—
Total derivatives designated as hedging instruments(a)(b)		$	3.1		$	0.3

(a)The Company has master netting agreements with its commodity hedge counterparties and accordingly has netted in its Consolidated Balance Sheets $0.3 million of its commodity contracts that are in payable positions against its contracts in receivable positions.

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

	Asset Derivatives			Liability Derivatives
Derivatives designated as hedging instruments:	Consolidated Balance Sheet Location	December 31, 2019		Consolidated Balance Sheet Location	December 31, 2019
Commodity contracts	Other current assets	$	0.3	Accrued expenses and other current liabilities	$	0.8
Commodity contracts	Other assets	0.1		Other noncurrent liabilities	0.2
Swap contracts	Other current assets	2.8		Accrued expenses and other current liabilities	—
Total derivatives designated as hedging instruments(a)(b)		$	3.2		$	1.0

(a)The Company has master netting agreements with its commodity hedge counterparties and accordingly has netted in its Consolidated Balance Sheets $0.4 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 swap contracts are receivable from both counterparties.

The following tables present activity related to other comprehensive (loss) income before taxes for the years ended December 31, 2020 and 2019 (in millions):

		Year Ended December 31, 2020
Derivatives in Cash Flow Hedging Relationships	Location of Gain Reclassified from Accumulated OCI Into Income (Effective Portion)	Amount of Gain Recognized in OCI on Derivative (Effective Portion)		Amount of Gain Reclassified from Accumulated OCI Into Income (Effective Portion)
Commodity contracts	Product cost	$	(1.8)	$	1.0
Swap contracts	Interest expense	(3.9)		3.6
Total		$	(5.7)	$	4.6

		Year Ended December 31, 2019
Derivatives in Cash Flow Hedging Relationships	Location of Gain Reclassified from Accumulated OCI Into Income Effective Portion)	Amount of Gain Recognized in OCI on Derivative (Effective Portion)		Amount of Gain Reclassified from Accumulated OCI Into Income (Effective Portion)
Commodity contracts	Product cost	$	(0.8)	$	0.9
Swap contracts	Interest expense	(2.5)		2.2
Total		$	(3.3)	$	3.1

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12.    COMMITMENTS AND CONTINGENCIES

Contingent Obligations:

The Wisconsin Department of Agriculture, Trade and Consumer Protection (“DATCP”) has information indicating that agricultural chemicals are present within the subsurface area of the Company’s Kenosha, Wisconsin property. 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 directed the Company to conduct further investigations into the possible presence of agricultural chemicals in soil and ground water at the Kenosha property. The Company has completed initial on-property investigations and has provided the findings to DATCP. All investigations and mitigation activities to date, and any potential future remediation work, are being conducted under the Wisconsin Agricultural Chemical Cleanup Program (the “ACCP”), which provides for reimbursement of some of the costs. The Company may seek participation by, or cost reimbursement from, other parties responsible for the presence of any agricultural chemicals found in soil and ground water at this site if the Company does not receive an acknowledgment of no further action and is required to conduct further investigation or remedial work that may not be eligible for reimbursement under the ACCP.

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 8, the Company’s Brazilian subsidiaries are party to administrative tax proceedings and claims which totaled $7.9 million and $15.8 million as of December 31, 2020 and 2019, 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 has assumed liabilities for labor-related matters in connection with the acquisition of Compass Minerals South America, which are primarily related to compensation, labor benefits and consequential tax claims and totaled $3.5 million and $5.6 million as of December 31, 2020 and 2019, respectively. The Company believes the maximum exposure for these other labor matters totaled approximately $16 million and $25 million as of December 31, 2020 and 2019, respectively.

The Division of Enforcement of the U.S. Securities and Exchange Commission (“SEC”) 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 that the outcome of legal proceeding 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.

Approximately 50% of workforce in the U.S., Canada and the U.K. and approximately 30% of the Company’s global workforce is represented by collective bargaining agreements. Of the Company’s 12 collective bargaining agreements in effect on January 1, 2021, two will expire in 2021 (including one for the Goderich mine, which expires on March 31, 2021), five will expire in 2022, three will expire in 2023 and one will expire in 2027. In addition, trade union membership is mandatory in Brazil, where approximately 40% of the Company’s global workforce is located.

Commitments:

Royalties: The Company has various private, state and Canadian provincial leases associated with the salt and specialty potash businesses, most of which are renewable by the Company. Many of these leases provide for a royalty payment to the lessor based on a specific amount per ton of mineral extracted or as a percentage of revenue. Royalty expense related to these leases was $18.3 million, $16.3 million and $14.8 million for the years ended December 31, 2020, 2019 and 2018, respectively.

Performance Bonds: The Company has various salt and other deicing product sales contracts that include performance provisions governing delivery and product quality. These sales contracts either require the Company to maintain performance bonds for stipulated amounts or contain contractual penalty provisions in the event of non-performance. For the three years ended December 31, 2020, the Company has had no material penalties related to these sales contracts. At December 31, 2020, the Company had $51.4 million of outstanding performance bonds, which includes bonds related to Ontario mining tax reassessments.

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Purchase Commitments: In connection with the operations of the Company’s facilities, the Company purchases utilities, other raw materials and services from third parties under contracts extending, in some cases, for multiple years. Purchases under these contracts are generally based on prevailing market prices. The Company has minimum throughput contracts with some of its depots and warehouses. The purchase commitments for these contracts are estimated to be $43.6 million for 2021, $13.3 million in 2022, $10.0 million in 2023, $7.8 million in 2024, $2.1 million in 2025 and $7.5 million thereafter.

13.    STOCKHOLDERS’ EQUITY AND EQUITY INSTRUMENTS

The Company paid dividends of $2.88 per share in 2020 and currently intends to continue paying quarterly cash dividends. The declaration and payment of future dividends to holders of the Company’s common stock will be at the discretion of the Company’s Board of Directors and will depend upon many factors, including the Company’s financial condition, earnings, legal requirements, restrictions in its debt agreements (see Note 10) and other factors the Company’s Board of Directors deems relevant.

Non-Employee Director Compensation

Non-employee directors may defer all or a portion of the fees payable for their service into deferred stock units, equivalent to the value of the Company’s common stock. Beginning in May 2020, the annual fees related to the director’s equity compensation were granted in deferred stock units or restricted stock units and vest at the next annual meeting. Additionally, as dividends are declared on the Company’s common stock, these deferred stock units are entitled to accrete dividends in the form of additional units based on the stock price on the dividend payment date. Accumulated deferred stock units are distributed in the form of Company common stock at a future specified date or following resignation from the Board of Directors, based upon the director’s annual election. During the years ended December 31, 2020, 2019 and 2018, members of the Board of Directors were credited with 42,313, 33,883 and 26,291 deferred stock units, respectively. During the year ended December 31, 2020, the directors were granted 3,750 restricted stock units. During the years ended December 31, 2020, 2019 and 2018, 8,525, 9,041 and 6,728 shares of common stock, respectively, were issued from treasury shares for director compensation.

Preferred stock

The Company is authorized to issue up to 10,000,000 shares of preferred stock, of which no shares are currently issued or outstanding. Of those, 200,000 shares of preferred stock were designated as series A junior participating preferred stock in connection with the Company’s now expired rights agreement.

Equity Compensation Awards

In 2005, the Company adopted the 2005 Incentive Award Plan (as amended, the “2005 Plan”), which authorized the issuance of 3,240,000 shares of Company common stock. 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. Upon the approval of the 2015 Plan , the Company ceased issuing equity awards under the 2005 Plan. In May 2020, the Company’s stockholders approved the 2020 Incentive Award Plan (the “2020 Plan”), which authorizes the issuance of 2,977,933 shares of Company common stock. Since the date the 2020 Plan was approved, the Company ceased issuing equity awards under the 2015 Plan. The 2005 Plan, 2015 Plan and 2020 Plan allow for grants of equity awards to executive officers, other employees and directors, including shares of common stock, restricted stock units (“RSUs”), performance stock units (“PSUs”), stock options and deferred stock units.

Options

Substantially all of the stock options granted under each of the plans 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 day of grant.

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 weighted average assumptions and fair values for options granted for each of the years ended December 31 is included in the following table.

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	2020			2019			2018
Fair value of options granted	$	10.91		$	9.15		$	8.77
Expected term (years)	4.8			4.5			4.5
Expected volatility	29.3		%	28.0		%	22.9		%
Dividend yield	3.5		%	4.1		%	3.6		%
Risk-free interest rates	1.6		%	2.3		%	2.5		%

RSUs

Most of the RSUs granted under the 2015 Plan and 2020 Plan vest after one to three years of service entitling the holders to one share of common stock for each vested RSU. The 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 that may be declared on the Company’s common stock equal to the per-share dividend declared. The closing stock price on the day of grant is used to determine the fair value of RSUs.

PSUs

Substantially all of the PSUs granted under the 2015 Plan and 2020 Plan are either total stockholder return PSUs (the “TSR PSUs”), return on invested capital PSUs (the “ROIC PSUs”) or earnings before interest, taxes, depreciation and amortization growth PSUs (“EBITDA 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 stockholder return to the total stockholder return for each company comprising the Company’s peer group over the three-year performance period and may range from 0% to 150% or 0% to 200% of the target number of shares based upon the attainment of these performance 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. The actual number of shares of common stock that may be earned with respect to EBITDA PSUs is calculated based on the attainment of EBITDA growth during the performance period.

EBITDA PSUs granted in 2020 have a two-year performance period that begins in 2021 and ends in 2022. Generally, TSR PSUs granted in 2020 have a three-year performance period that begins in 2020 and ends in 2022. Both types of PSUs granted in 2020 vest in the first quarter of 2023. PSUs represent a target number of shares of Company common stock that may be earned before adjustment based upon the attainment of certain performance conditions. Holders of PSUs 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 issued.

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 peer group. This model uses historical stock prices to estimate expected volatility and the Company’s correlation to the 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 and EBITDA PSUs. The Company will adjust the expense of the ROIC PSUs and EBITDA 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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The following is a summary of the Company’s stock option, RSU and PSU activity and related information for the following periods:

	Stock Options			RSUs			PSUs
	Number	Weighted-average exercise price		Number	Weighted-average fair value		Number	Weighted-average fair value
Outstanding at December 31, 2017	562,877	$	75.89	70,856	$	74.63	112,036	$	79.48
Granted	250,514	59.61		42,013	60.28		67,235	64.30
Exercised(a)	—	—		—	—		—	—
Released from restriction(a)	—	—		(16,905)	88.78		(2,753)	78.92
Cancelled/Expired	(104,645)	71.65		(12,656)	66.53		(49,880)	85.51
Outstanding at December 31, 2018	708,746	$	70.76	83,308	$	65.75	126,638	$	69.06
Granted	369,716	54.15		218,071	49.73		123,003	56.88
Exercised(a)	—	—		—	—		—	—
Released from restriction(a)	—	—		(32,630)	66.95		—	—
Cancelled/Expired	(190,595)	69.06		(51,336)	54.87		(70,244)	67.20
Outstanding at December 31, 2019	887,867	$	64.21	217,413	$	52.07	179,397	$	61.43
Granted	94,945	58.91		95,276	58.24		107,072	74.73
Exercised(a)	(4,454)	57.02		—	—		—	—
Released from restriction(a)	—	—		(76,570)	50.03		(11,575)	78.87
Cancelled/Expired	(109,586)	69.00		(28,137)	51.85		(33,100)	68.18
Outstanding at December 31, 2020	868,772	$	63.06	207,982	$	55.68	241,794	$	65.57

(a)Common stock issued for exercised options, vested RSUs and vested and earned PSUs were issued from treasury shares.

As of December 31, 2019, there were 887,867 options outstanding of which 416,860 were exercisable. The following table summarizes information about options outstanding and exercisable at December 31, 2020.

	Options Outstanding				Options Exercisable
Range of exercise prices	Options outstanding	Weighted-average remaining contractual life (years)	Weighted-average exercise price of options outstanding		Options exercisable	Weighted-average remaining contractual life (years)	Weighted-average exercise price of exercisable options
$53.75 - $54.38	252,245	5.3	$	53.75	84,082	5.3	$	53.75
$54.39 - $59.21	159,424	5.7	57.01		18,836	5.2	55.01
$59.22 - $63.75	159,445	4.3	59.50		110,700	4.3	59.50
$63.76 - $69.77	119,357	3.1	68.03		104,796	3.0	68.01
$69.78 - $91.75	178,301	1.3	81.51		178,301	1.3	81.51
Totals	868,772	4.1	$	63.06	496,715	3.1	$	68.05

During the years ended December 31, 2020, 2019 and 2018, the Company recorded compensation expense of $9.9 million (includes $0.5 million paid in cash), $7.4 million (includes $1.1 million paid in cash) and $7.8 million, respectively, related to its stock-based compensation awards that are expected to vest. No amounts have been capitalized. The fair value of options vested was $1.4 million, $0.8 million and $2.7 million in 2020, 2019 and 2018, respectively.

As of December 31, 2020, unrecorded compensation cost related to non-vested awards of $14.7 million is expected to be recognized from 2021 through 2023, with a weighted average period of 1.8 years.

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The intrinsic value of stock options exercised during the years ended December 31, 2020, 2019 and 2018 each totaled less than $0.1 million. As of December 31, 2020, the intrinsic value of options outstanding totaled $3.1 million, of which 496,715 options with an intrinsic value of $1.0 million were exercisable. The number of shares held in treasury is sufficient to cover all outstanding equity awards as of December 31, 2020.

Accumulated Other Comprehensive Loss

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 (loss) 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”) for the years ended December 31, 2020 and 2019 are as follows (in millions):

Year Ended December 31, 2020(a)	Gains and (Losses) on Cash Flow Hedges		Defined Benefit Pension		Foreign Currency		Total
Beginning balance	$	(0.6)	$	(6.9)	$	(184.6)	$	(192.1)
Other comprehensive income (loss) before reclassifications	3.9		(3.2)		(109.5)		(108.8)
Amounts reclassified from accumulated other comprehensive loss	(3.1)		0.7		—		(2.4)
Net current period other comprehensive income (loss)	0.8		(2.5)		(109.5)		(111.2)
Ending balance	$	0.2	$	(9.4)	$	(294.1)	$	(303.3)

Year Ended December 31, 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	2.2		(2.7)		21.1		20.6
Amounts reclassified from accumulated other comprehensive loss	(2.1)		0.3		—		(1.8)
Net current period other comprehensive income (loss)	0.1		(2.4)		21.1		18.8
Ending balance	$	(0.6)	$	(6.9)	$	(184.6)	$	(192.1)

(a)With the exception of the cumulative foreign currency translation adjustment, for which no tax effect is recorded, the changes in the components of AOCL presented in the table are reflected net of applicable income taxes.

Year Ended December 31, 2020	Amount Reclassified from AOCL		Line Item Impacted in the Consolidated Statement of Operations
Losses on cash flow hedges:
Natural gas instruments	$	(1.0)	Product cost
Foreign currency contracts	(3.6)		Interest expense
Income tax expense	1.5
Reclassifications, net of income taxes	(3.1)
Amortization of defined benefit pension:
Amortization of loss	$	0.9	Product cost
Income tax benefit	(0.2)
Reclassifications, net of income taxes	0.7
Total reclassifications, net of income taxes	$	(2.4)

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Year Ended December 31, 2019	Amount Reclassified from AOCL		Line Item Impacted in the Consolidated Statement of Operations
Gains (losses) on cash flow hedges:
Natural gas instruments	$	(0.9)	Product cost
Foreign currency contracts	(2.2)		Interest Expense
Income tax expense	1.0
Reclassifications, net of income taxes	(2.1)
Amortization of defined benefit pension:
Amortization of loss	$	0.4	Product cost
Income tax benefit	(0.1)
Reclassifications, net of income taxes	0.3
Total reclassifications, net of income taxes	$	(1.8)

14.    FAIR VALUE MEASUREMENTS

The Company’s financial instruments are measured and reported at their estimated fair value. Fair value is the price that would be received to sell 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 Savings Plans, which are valued based on readily available quoted market prices. The Company also holds short-term investments which are classified as trading securities with any gains or losses recognized through earnings. 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 11). The fair value of the natural gas derivative instruments and the foreign currency swaps 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).

	December 31, 2020		Level One		Level Two		Level Three
Asset Class:
Mutual fund investments in a non-qualified savings plan(a)	$	1.9	$	1.9	$	—	$	—
Derivatives – natural gas instruments, net	0.2		—		0.2		—
Derivatives - foreign currency contracts, net	2.6		—		2.6		—
Total Assets	$	4.7	$	1.9	$	2.8	$	—
Liability Class:
Liabilities related to non-qualified savings plan	$	(1.9)	$	(1.9)	$	—	$	—
Total Liabilities	$	(1.9)	$	(1.9)	$	—	$	—

(a)Includes mutual fund investments of approximately 30% in the common stock of large-cap U.S. companies, 10% in the common stock of small to mid-cap U.S. companies, 5% in the common stock of international companies, 15% in bond funds, 15% in short-term investments and 25% in blended funds.

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	December 31, 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	2.8		—		2.8		—
Total Assets	$	4.2	$	1.4	$	2.8	$	—
Liability Class:
Liabilities related to non-qualified savings plan	$	(1.4)	$	(1.4)	$	—	$	—
Derivatives - natural gas instruments, net	(0.6)		—		(0.6)		—
Total Liabilities	$	(2.0)	$	(1.4)	$	(0.6)	$	—

(a)Includes mutual fund investments of approximately 30% 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, 10% in bond funds, 20% in short-term investments and 20% in blended funds.

Cash and cash equivalents, receivables (net of reserve for doubtful accounts) and accounts payable are carried at cost, which approximates fair value due to their liquid and short-term nature. The Company’s investments related to its nonqualified retirement plan of $1.9 million and $1.4 million as of December 31, 2020 and 2019, respectively, are stated at fair value based on quoted market prices. As of December 31, 2020 and 2019, the estimated fair value of the Company’s fixed-rate 4.875% Notes, based on available trading information (Level 2), totaled $260.3 million and $249.1 million, respectively, compared with the aggregate principal amount at maturity of $250.0 million. As of December 31, 2020 and 2019, the estimated fair value of the Company’s fixed-rate 6.75% Notes, based on available trading information (Level 2), totaled $543.1 million and $530.6 million, respectively, compared with the aggregate principal amount at maturity of $500.0 million. The fair value at December 31, 2020 and 2019 of 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 approximately $513.8 million and $552.8 million, respectively, compared with the aggregate principal amount at maturity of $520.3 million and $560.0 million, respectively. The Brazilian loans have floating rates and their fair value approximates their carrying value (see Note 10).

15.    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 and magnesium chloride for use in road deicing and dust control, food processing, water softeners and agricultural and industrial applications. SOP crop nutrients, industrial-grade SOP and micronutrients are produced and marketed through the Plant Nutrition North America segment. The Company’s 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. It also manufactures and markets specialty chemicals for the industrial chemical industry.

The accounting policies of the segments are the same as those described in the summary of significant accounting policies. All intersegment sales prices are market-based. The Company evaluates performance based on the operating earnings of the respective segments.

Segment information as of and for the years ended December 31, is as follows (in millions):

2020	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate& Other(a)		Total
Sales to external customers	$	779.4	$	239.6	$	344.4	$	10.1	$	1,373.5
Intersegment sales	—		5.4		0.3		(5.7)		—
Shipping and handling cost	217.8		34.0		14.8		—		266.6
Operating earnings (loss)	161.8		12.1		40.3		(73.7)		140.5
Depreciation, depletion and amortization	66.6		40.4		17.4		13.5		137.9
Total assets	1,020.8		520.8		579.2		141.6		2,262.4
Capital expenditures	56.8		12.5		9.6		6.0		84.9

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2019	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate& Other(a)		Total
Sales to external customers	$	889.5	$	206.2	$	385.1	$	9.7	$	1,490.5
Intersegment sales	—		6.4		2.7		(9.1)		—
Shipping and handling cost	267.4		28.5		16.6		—		312.5
Operating earnings (loss)(b)	168.0		22.5		40.0		(66.9)		163.6
Depreciation, depletion and amortization	60.4		44.6		22.4		10.5		137.9
Total assets	1,056.3		575.5		715.3		96.1		2,443.2
Capital expenditures	65.9		15.2		10.5		6.5		98.1

2018	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate& Other(a)		Total
Sales to external customers	$	858.1	$	233.2	$	391.8	$	10.5	$	1,493.6
Intersegment sales	—		5.6		3.4		(9.0)		—
Shipping and handling cost	272.4		29.0		18.6		—		320.0
Operating earnings (loss)(b)	115.7		25.3		48.7		(59.4)		130.3
Depreciation, depletion and amortization	56.2		48.6		22.2		9.9		136.9
Total assets	948.9		589.3		709.9		119.8		2,367.9
Capital expenditures	58.7		20.7		10.1		7.3		96.8

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

Year Ended December 31, 2020	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate & Other(a)		Total
Highway Deicing Salt	$	473.8	$	—	$	—	$	—	$	473.8
Consumer & Industrial Salt	305.6		—		—		—		305.6
SOP and Specialty Plant Nutrients	—		245.0		272.8		—		517.8
Industrial Chemicals	—		—		71.9		—		71.9
Eliminations & Other	—		(5.4)		(0.3)		10.1		4.4
Sales to external customers	$	779.4	$	239.6	$	344.4	$	10.1	$	1,373.5

Year Ended December 31, 2019	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate & Other(a)		Total
Highway Deicing Salt	$	545.5	$	—	$	—	$	—	$	545.5
Consumer & Industrial Salt	344.0		—		—		—		344.0
SOP and Specialty Plant Nutrients	—		212.6		298.6		—		511.2
Industrial Chemicals	—		—		89.2		—		89.2
Eliminations & Other	—		(6.4)		(2.7)		9.7		0.6
Sales to external customers	$	889.5	$	206.2	$	385.1	$	9.7	$	1,490.5

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Year Ended December 31, 2018	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate & Other(a)		Total
Highway Deicing Salt	$	532.0	$	—	$	—	$	—	$	532.0
Consumer & Industrial Salt	326.1		—		—		—		326.1
SOP and Specialty Plant Nutrients	—		238.8		300.2		—		539.0
Industrial Chemicals	—		—		95.0		—		95.0
Eliminations & Other	—		(5.6)		(3.4)		10.5		1.5
Sales to external customers	$	858.1	$	233.2	$	391.8	$	10.5	$	1,493.6

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

(b)In 2019, operating results included $2.8 million of additional logistics costs related to Mississippi River flooding and $2.3 million of severance and other costs related to executive transition. In 2018, corporate and other operating results included $5.1 million for executive transition costs.

Financial information relating to the Company’s operations by geographic area for the years ended December 31 is as follows (in millions):

Sales	2020		2019		2018
United States(a)	$	766.6	$	821.9	$	769.9
Canada	207.6		228.8		238.6
Brazil	336.6		375.2		381.8
United Kingdom	41.6		45.2		83.1
Other	21.1		19.4		20.2
Total sales	$	1,373.5	$	1,490.5	$	1,493.6

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

Financial information relating to the Company’s long-lived assets, excluding the investments related to the nonqualified retirement plan and pension plan assets, by geographic area as of December 31 (in millions):

Long-Lived Assets	2020		2019		2018
United States	$	532.9	$	561.5	$	551.6
Canada	514.0		522.8		497.4
United Kingdom	73.9		71.4		62.5
Brazil	376.0		493.1		524.8
Other	6.5		6.5		6.5
Total long-lived assets	$	1,503.3	$	1,655.3	$	1,642.8

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16.    EARNINGS PER SHARE

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):

Year ended December 31,	2020		2019		2018
Numerator:
Net earnings	$	59.5	$	62.5	$	68.8
Less: Net earnings allocated to participating securities(a)	(1.3)		(1.1)		(0.5)
Net earnings available to common stockholders	$	58.2	$	61.4	$	68.3
Denominator (in thousands):
Weighted average common shares outstanding, shares for basic earnings per share(b)	33,928		33,882		33,848
Weighted average equity awards outstanding	—		—		—
Shares for diluted earnings per share	33,928		33,882		33,848
Net earnings per common share, basic	$	1.72	$	1.82	$	2.02
Net earnings per common share, diluted	$	1.72	$	1.81	$	2.02

(a)Participating securities include PSUs and RSUs that receive non-forfeitable dividends. Net earnings were allocated to participating securities of 397,000, 307,000 and 186,000 for 2020, 2019 and 2018, respectively.

(b)For the calculation of diluted 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 1,188,000, 1,067,000 and 788,000 weighted options outstanding for 2020, 2019 and 2018, respectively, which were anti-dilutive and therefore not included in the diluted earnings per share calculation.

17.    QUARTERLY RESULTS (Unaudited) (in millions, except share and per share data)

Quarter	First		Second		Third		Fourth
2020
Sales	$	413.9	$	256.1	$	282.4	$	421.1
Gross profit	87.3		66.3		58.7		100.0
Net earnings (loss)(a)	27.6		1.7		(2.1)		32.3
Net earnings (loss) per share, basic(a)	0.80		0.04		(0.07)		0.94
Net earnings (loss) per share, diluted(a)	0.80		0.04		(0.07)		0.94
Basic weighted-average shares outstanding (in thousands)	33,892		33,915		33,947		33,958
Diluted weighted-average shares outstanding (in thousands)	33,892		33,915		33,947		33,977
2019
Sales	$	403.7	$	245.2	$	341.3	$	500.3
Gross profit	72.6		45.8		76.4		142.0
Net earnings (loss)(a)	7.6		(11.8)		10.6		56.1
Net earnings (loss) per share, basic(a)	0.22		(0.36)		0.31		1.64
Net earnings (loss) per share, diluted (a)	0.22		(0.36)		0.31		1.63
Basic weighted-average shares outstanding (in thousands)	33,874		33,883		33,884		33,886
Diluted weighted-average shares outstanding (in thousands)	33,874		33,883		33,884		33,886

(a)In the fourth quarter of 2020, the Company released a domestic tax reserve of $11.0 million. In the second quarter of 2019, the Company incurred $2.8 million ($2.1 million, net of tax) of additional logistics costs related to Mississippi River flooding. In the third quarter of 2019, the Company incurred $2.3 million ($1.7 million, net of tax) of severance and other costs related to executive transition.

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18.    SUBSEQUENT EVENT

Dividend Declared:

On February 25, 2021, the Board of Directors declared a quarterly cash dividend of $0.72 per share on the Company’s outstanding common stock, unchanged from the quarterly cash dividends paid in 2020. The dividend will be paid on March 19, 2021, to stockholders of record as of the close of business on March 10, 2021.

ITEM 9.     CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE

None.

ITEM 9A.    CONTROLS AND PROCEDURES

Disclosure Controls and Procedures

The Company maintains disclosure controls and procedures that are designed to provide reasonable assurance that information required to be disclosed in the Company’s reports under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms, and that such information is accumulated and communicated to management, including the Company’s President and Chief Executive Officer (“CEO”) and Chief Financial Officer (“CFO”), as appropriate, to allow timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives. Management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

In connection with the preparation of this Annual Report on Form 10-K, an evaluation is performed under the supervision and with the participation of the Company’s management, including the CEO and CFO, 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 Exchange Act) as of December 31, 2020. Based on that evaluation, the CEO and CFO conclude whether the Company’s disclosure controls and procedures are effective as of December 31, 2020, at the reasonable assurance level.

In connection with this Annual Report on Form 10-K for the year ended December 31, 2020, an evaluation was performed of the effectiveness of the design and operation of the Company’s disclosure controls and procedures as of December 31, 2020. Based on that evaluation, the CEO and CFO concluded that the disclosure controls and procedures were effective as of December 31, 2020, at the reasonable assurance level.

Management’s Report on Internal Control Over Financial Reporting

The Company’s management is responsible for establishing and maintaining adequate internal control over financial reporting, as defined in Rule 13a-15(f) under the Exchange Act. The Company’s internal control over financial reporting is a process designed 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. Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Management conducts an evaluation and assesses the effectiveness of the Company’s internal control over financial reporting as of the reporting date. In making its assessment of internal control over financial reporting, management uses the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (“COSO”) in Internal Control-Integrated Framework (2013).

A material weakness is a control deficiency, or combination of control deficiencies, that result in more than a remote likelihood that a material misstatement of the annual or interim financial statements will not be prevented or detected. As of December 31, 2020, management conducted an evaluation and assessed the effectiveness of the Company’s internal control over financial reporting. Based on its evaluation, management concluded that the Company’s internal control over financial reporting was effective as of December 31, 2020. Ernst & Young LLP, the Company’s independent registered public accounting firm, has audited the Company’s consolidated financial statements for the year ended December 31, 2020, and has also issued an audit report dated February 26, 2021, on the effectiveness of the Company’s internal control over financial reporting as of December 31, 2020, which is included in this Annual Report on Form 10-K.

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Changes in Internal Control Over Financial Reporting

There have been no changes in the Company’s internal control over financial reporting during the most recently completed fiscal quarter that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

ITEM 9B.    OTHER INFORMATION

None.

PART III

ITEM 10.    DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

Information regarding the Company’s executive officers is included in Part I to this Form 10-K under the caption “Information about our Executive Officers” and is incorporated herein by reference.

The information required by this item will be included under the captions “Proposal 1—Election of Directors,” “Corporate Governance,” and “Board of Directors and Board Committees” in the Company’s proxy statement for its 2021 annual meeting of stockholders (the “2021 Proxy Statement”) and is incorporated herein by reference. 

Code of Ethics and Business Conduct

The Company has adopted a Code of Ethics and Business Conduct that applies to all employees, including the Company’s principal executive officer, principal financial officer and principal accounting officer, as well as members of the Board of Directors of the Company. The Code of Ethics and Business Conduct is available on the Company’s website at www.compassminerals.com. The Company intends to disclose any changes in, or waivers from, this Code of Ethics and Business Conduct by posting such information on the same website or by filing a Current Report on Form 8-K, in each case to the extent such disclosure is required by SEC or New York Stock Exchange rules.

ITEM 11.    EXECUTIVE COMPENSATION

The information required by this item will be included under the captions “2020 Non-Employee Director Compensation,” “Corporate Governance—Compensation Committee Interlocks and Insider Participation,” “Compensation Discussion and Analysis,” “Compensation Committee Report” and “Executive Compensation Tables” in the 2021 Proxy Statement and is incorporated herein by reference.

ITEM 12.     SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS

The information required by this item will be included under the caption “Stock Ownership of Certain Beneficial Owners and Management” in the 2021 Proxy Statement and is incorporated herein by reference. Information regarding the Company’s equity compensation plans is included in this report under the caption “Equity Compensation Tables” and is incorporated herein by reference.

ITEM 13.    CERTAIN RELATIONSHIPS AND OTHER TRANSACTIONS AND DIRECTOR INDEPENDENCE

The information required by this item will be included under the captions “Corporate Governance—Review and Approval of Transactions with Related Persons” and “Board of Directors and Board Committees—Director Independence” in the 2021 Proxy Statement and is incorporated herein by reference.

ITEM 14.    PRINCIPAL ACCOUNTING FEES AND SERVICES

The information required by this item will be included under the caption “Proposal 3—Ratification of Appointment of Independent Auditors” in the 2021 Proxy Statement and is incorporated herein by reference.

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PART IV

ITEM 15.    EXHIBITS, FINANCIAL STATEMENT SCHEDULES

(a)(1) Financial statements and supplementary data required by this Item 15 are set forth below:

Description	Page
Management’s Report on Internal Controls Over Financial Reporting	95
Reports of Independent Registered Public Accounting Firm	55
Consolidated Balance Sheets as of December 31, 2020 and 2019	58
Consolidated Statements of Operations for each of the three years in the period ended December 31, 2020	59
Consolidated Statements of Comprehensive (Loss) Income for each of the three years in the period ended December 31, 2020	60
Consolidated Statements of Stockholders’ Equity for each of the three years in the period ended December 31, 2020	61
Consolidated Statements of Cash Flows for each of the three years in the period ended December 31, 2020	62
Notes to Consolidated Financial Statements	63
Schedule II – Valuation Reserves	97

(a)(2) Financial Statement Schedule:

Schedule II — Valuation Reserves

Compass Minerals International, Inc.

December 31, 2020, 2019 and 2018

Description (in millions)	Balance at the Beginning of the Year		Additions (Deductions) Charged to Expense		Deductions(1)		Balance at the End of the Year
Deducted from Receivables — Allowance for Doubtful Accounts
2020	$	10.7	$	9.3	$	(8.9)	$	11.1
2019	9.9		4.7		(3.9)		10.7
2018	10.9		1.0		(2.0)		9.9
Deducted from Deferred Income Taxes — Valuation Allowance
2020	$	41.2	$	2.5	$	(0.3)	$	43.4
2019	40.9		0.3		—		41.2
2018(2)	10.2		39.2		(8.5)		40.9

(1)Deduction for purposes for which reserve was created.

(2)The 2018 additions primarily relate to foreign tax credits which offset a deferred tax asset. This amount was not charged to expense.

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(a)(3) List of Exhibits:

Exhibit No.	Description of Exhibit
2.1	Agreement and Plan of Merger, dated October 13, 2001, among IMC Global Inc., Compass Minerals International, Inc. (formerly known as Salt Holdings Corporation), YBR Holdings LLC and YBR Acquisition Corp (incorporated herein by reference to Exhibit 2.1 to Compass Minerals’ Registration Statement on Form S-4, File No. 333-104603).
2.2	Amendment No. 1 to Agreement and Plan of Merger, dated November 28, 2001, among IMC Global Inc., Compass Minerals International, Inc. (formerly known as Salt Holdings Corporation), YBR Holdings LLC and YBR Acquisition Corp (incorporated herein by reference to Exhibit 2.2 to Compass Minerals Registration Statement on Form S-4, File No. 333-104603).
2.3	Subscription Agreement and Other Covenants, dated December 16, 2015, among Compass Minerals do Brasil Ltda., certain shareholders of Produquímica Indústria e Comércio S.A. and Produquímica Indústria e Comércio S.A. (incorporated by reference to Exhibit 2.3 to Compass Minerals International, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2015).
2.4	Second Amendment, dated August 12, 2016, to the Subscription Agreement and Other Covenants, dated December 16, 2015, among Compass Minerals do Brasil Ltda., certain shareholders of Produquímica Indústria e Comércio S.A. and Produquímica Indústria e Comércio S.A. (incorporated herein by reference to Exhibit 2.1 to Compass Minerals International Inc.’s Current Report on Form 8-K filed on August 15, 2016).
2.5	Share Purchase and Sale Agreement, dated December 16, 2015, among Compass Minerals do Brasil Ltda., certain shareholders of Produquímica Indústria e Comércio S.A. and Produquímica Indústria e Comércio S.A. (incorporated by reference to Exhibit 2.4 to Compass Minerals International, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2015).
3.1	Amended and Restated Certificate of Incorporation of Compass Minerals International, Inc. (incorporated herein by reference to Exhibit 3.1 to Compass Minerals International, Inc.’s Current Report on Form 8-K filed on May 19, 2020).
3.2	By-laws of Compass Minerals International, Inc., amended and restated as of December 26, 2020 (incorporated herein by reference to Exhibit 3.1 to Compass Minerals International, Inc.’s Current Report on Form 8-K filed on December 30, 2020).
3.3	Certificate of Designation for the Series A Junior Participating Preferred Stock, par value $0.01 per share (incorporated herein by reference to Exhibit A of Exhibit 4.1 to Compass Minerals International, Inc.’s Current Report on Form 8-K filed on December 19, 2012).
4.1	Indenture, dated as of June 23, 2014, by and among Compass Minerals International, Inc., the Guarantors named therein, and U.S. National Bank Association, as trustee, relating to the 4.875% Senior Notes due 2024 (incorporated herein by reference to Exhibit 4.1 to Compass Minerals International, Inc.’s Current Report on Form 8-K filed on June 26, 2014).
4.2	Form of 4.875% Senior Notes due 2024 (included as Exhibit 1 to Exhibit 4.1).
4.3	Indenture, dated November 26, 2019, among Compass Minerals International, Inc., the guarantors named therein and Wells Fargo Bank, National Association, as trustee, relating to the 6.750% Senior Notes due 2027 (incorporated herein by reference to Exhibit 4.1 to Compass Minerals International, Inc.’s Current Report on Form 8-K filed on November 26, 2019).
4.4	Form of 6.750% Senior Note due 2027 (included in Exhibit 1 to Exhibit 4.3).
4.5*	Description of Securities.
10.1	Salt Mining Lease, dated November 9, 2001, between the Province of Ontario, as lessor, and Sifto Canada Inc. as lessee (incorporated herein by reference to Exhibit 10.1 to Compass Minerals’ Registration Statement on Form S-4, File No. 333-104603).
10.2	Amended and Restated Salt and Surface Lease, effective January 1, 2014, between Island Partnership, L.L.C., JMB Cote Blanche L.L.C., CFB, LLC and Carey Salt Company (incorporated herein by reference to Exhibit 10.7 to Compass Minerals International, Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2014).
10.3	Royalty Agreement, dated September 1, 1962, between Great Salt Lake Minerals Corporation and the Utah State Land Board (incorporated herein by reference to Exhibit 10.3 to Compass Minerals’ Registration Statement on Form S-4, File No. 333-104603).
10.4	Share Purchase Agreement, dated March 19, 2014, between Compass Minerals Manitoba Inc., Compass Minerals International, Inc. and the shareholders of Wolf Trax Inc. (incorporated herein by reference to Exhibit 10.8 to Compass Minerals International, Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2014).
10.5	Amendment and Restatement Agreement, dated November 26, 2019, among Compass Minerals International, Inc., Compass Minerals Canada Corp., Compass Minerals UK Limited, the other loan parties party thereto, the lenders and issuing banks party thereto from time to time and JPMorgan Chase Bank, N.A., as administrative agent (incorporated herein by reference to Exhibit 10.1 to Compass Minerals International, Inc.’s Current Report on Form 8-K filed on November 26, 2019).

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10.6	Receivables Financing Agreement, dated June 30, 2020, among Compass Minerals Receivables LLC, Compass Minerals America Inc., PNC Bank, National Association, the lenders party thereto and PNC Capital Markets, LLC (incorporated herein by reference to Exhibit 10.1 to Compass Minerals International, Inc.’s Current Report on Form 8-K filed on July 1, 2020).
10.7	Purchase and Sale Agreement, dated June 30, 2020, among Compass Minerals Receivables LLC, Compass Minerals America Inc. and Compass Minerals USA Inc. (incorporated herein by reference to Exhibit 10.2 to Compass Minerals International, Inc.’s Current Report on Form 8-K filed on July 1, 2020).
10.8	Performance Guaranty, dated June 30, 2020, made by Compass Minerals International, Inc. in favor of PNC Bank, National Association (incorporated herein by reference to Exhibit 10.3 to Compass Minerals International, Inc.’s Current Report on Form 8-K filed on July 1, 2020).
10.9+	Compass Minerals International, Inc. Directors’ Deferred Compensation Plan, Amended and Restated Effective as of January 1, 2005 (incorporated herein by reference to Exhibit 10.26 to Compass Minerals International, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2006).
10.10+	First Amendment to the Compass Minerals International, Inc. Directors’ Deferred Compensation Plan effective January 1, 2007 (incorporated herein by reference to Exhibit 10.28 to Compass Minerals International, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2006).
10.11+	Second Amendment to the Compass Minerals International, Inc. Directors’ Deferred Compensation Plan (incorporated herein by reference to Exhibit 10.4 to Compass Minerals International, Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2009).
10.12+	2012 Form of Independent Director Deferred Stock Award Agreement (incorporated herein by reference to Exhibit 10.3 to Compass Minerals International, Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2012).
10.13+	Amendment to 2012 and 2013 Independent Director Deferred Stock Award Agreement for Eric Ford (incorporated herein by reference to Exhibit 10.15 to Compass Minerals International, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2013).
10.14+	2014 Form of Foreign Director Deferred Stock Award Agreement (incorporated herein by reference to Exhibit 10.6 to Compass Minerals International, Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2014).
10.15+	2015 Form of Independent Director Deferred Award Agreement (incorporated by reference to Exhibit 10.2 to Compass Minerals International, Inc.’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2015).
10.16+	2015 Form of Independent Foreign Director Deferred Award Agreement (incorporated by reference to Exhibit 10.3 to Compass Minerals International, Inc.’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2015).
10.17+	2017 Form of Non-Employee Director Award Grant Notice (incorporated by reference to Exhibit 10.1 to Compass Minerals International, Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2017).
10.18+	2020 Form of Non-Employee Director Award Grant Notice (DSUs) (incorporated by reference to Exhibit 10.2 to Compass Minerals International, Inc.’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2020).
10.19+	2020 Form of Non-Employee Director Award Grant Notice (RSUs) (incorporated by reference to Exhibit 10.3 to Compass Minerals International, Inc.’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2020).
10.20+	Non-Employee Director Compensation Policy, effective January 1, 2017 (incorporated by reference to Exhibit 10.2 to Compass Minerals International, Inc.’s Current Report on Form 8-K filed on February 2, 2017).
10.21+	Non-Employee Director Compensation Policy, effective Mary 14, 2020 (incorporated by reference to Exhibit 10.1 to Compass Minerals International, Inc.’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2020).
10.22+	Summary of Non-Employee Director Compensation, as of January 1, 2019 (incorporated by reference to Exhibit 10.21 to Compass Minerals International, Inc.’s Annual Report on Form 10-K filed for the year ended December 31, 2018).
10.23+*	Summary of Non-Employee Director Compensation, as of January 1, 2021.
10.24+	Form of Indemnification Agreement for Directors of Compass Minerals International, Inc. (incorporated by reference to Exhibit 10.1 to Compass Minerals International, Inc.’s Current Report on Form 8-K filed on March 26, 2009).
10.25+	Compass Minerals International, Inc. 2005 Incentive Award Plan as approved by stockholders on August 4, 2005 (incorporated herein by reference to Exhibit 10.15 to Compass Minerals International, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2005).
10.26+	First Amendment to the Compass Minerals International, Inc. 2005 Incentive Award Plan (incorporated herein by reference to Exhibit 10.5 to Compass Minerals International, Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2007).
10.27+	Second Amendment to the Compass Minerals International, Inc. 2005 Incentive Award Plan (incorporated herein by reference to Exhibit 10.6 to Compass Minerals International, Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2009).

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10.28+	Third Amendment to the Compass Minerals International, Inc. 2005 Incentive Award Plan (incorporated herein by reference to Exhibit 10.22 to Compass Minerals International, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2011).
10.29+	Fourth Amendment to the Compass Minerals International, Inc. 2005 Incentive Award Plan (incorporated herein by reference to Exhibit 10.23 to Compass Minerals International, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2011).
10.30+	Compass Minerals International, Inc. 2015 Incentive Award Plan (incorporated by reference to Exhibit 99.1 to Compass Minerals International, Inc.’s Registration Statement on Form S-8, File No. 333-203922).
10.31+	Amendment No. 1 to the Compass Minerals International, Inc. 2015 Incentive Award Plan (incorporated herein by reference to Exhibit 10.3 to Compass Mineral International, Inc.’s Current Report on Form 8-K filed on November 19, 2018).
10.32+	Compass Minerals International, Inc. 2020 Equity Incentive Plan (incorporated by reference to Exhibit 99.1 to Compass Minerals International, Inc.’s Registration Statement on Form S-8, File No. 333-23852, filed on May 14, 2020).
10.33+	2013 Form of Non-Qualified Stock Option Award Agreement (incorporated herein by reference to Exhibit 10.5 to Compass Minerals International, Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2013).
10.34+	2014 Form of Non-Qualified Stock Option Award Agreement (incorporated herein by reference to Exhibit 10.4 to Compass Minerals International, Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2014).
10.35+	2015 Form of Non-Qualified Stock Option Award Agreement (incorporated herein by reference to Exhibit 10.5 to Compass Minerals International, Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2015).
10.36+	2016 Form of Non-Qualified Stock Option Award Agreement (incorporated by reference to Exhibit 10.4 to Compass Minerals International, Inc.’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2016).
10.37+	2017 Form of Stock Option Grant Notice (incorporated by reference to Exhibit 10.2 to Compass Minerals International, Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2017).
10.38+	2020 Form of Stock Option Grant Notice (incorporated by reference to Exhibit 10.5 to Compass Minerals International, Inc.’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2020).
10.39+	2017 Form of Restricted Stock Unit Grant Notice (incorporated by reference to Exhibit 10.3 to Compass Minerals International, Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2017).
10.40+	2020 Form of Restricted Stock Unit Grant Notice (incorporated by reference to Exhibit 10.6 to Compass Minerals International, Inc.’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2020).
10.41+	2021 Form of Restricted Stock Unit Grant Notice (incorporated by reference to Exhibit 10.1 to Compass Minerals International, Inc.’s Current Report on Form 8-K filed on January 5, 2021).
10.42+	2017 Form of Performance Stock Unit Grant Notice (ROIC) (incorporated by reference to Exhibit 10.4 to Compass Minerals International, Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2017).
10.43+	2017 Form of Performance Stock Unit Grant Notice (rTSR) (incorporated by reference to Exhibit 10.5 to Compass Minerals International, Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2017).
10.44+	2018 Form of Performance Stock Unit Grant Notice (rTSR) (incorporated by reference to Exhibit 10.1 to Compass Minerals International, Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2018).
10.45+	2020 Form of Performance Stock Unit Grant Notice (rTSR) (incorporated by reference to Exhibit 10.7 to Compass Minerals International, Inc.’s Quarterly Report on Form 10-Q for the quarter ended June 20, 2020).
10.46+	2021 Form of Performance Stock Unit Grant Notice (EBITDA Growth) (incorporated by reference to Exhibit 10.2 to Compass Minerals International, Inc.’s Current Report on Form 8-K filed on January 5, 2021).
10.47+	2016 Rules, Policies and Procedures for Equity Awards Granted to Employees (incorporated by reference to Exhibit 10.6 to Compass Minerals International, Inc.’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2016).
10.48+	2017 Rules, Policies and Procedures for Equity Awards Granted to Employees (incorporated by reference to Exhibit 10.6 to Compass Minerals International, Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2017).
10.49+	2019 Rules, Policies and Procedures for Equity Awards Granted to Employees (incorporated by reference to Exhibit 10.45 to Compass Minerals International, Inc.’s Annual Report on Form 10-K filed for the year ended December 31, 2018).
10.50+	2020 Rules, Policies and Procedures for Equity Awards Granted to Employees (incorporated herein by reference to Exhibit 10.2 to Compass Minerals International, Inc.’s Current Report on Form 8-K filed on May 19, 2020).
10.51+	Compass Minerals International, Inc. Restoration Plan, as amended and restated effective January 1, 2018 (incorporated by reference to Exhibit 10.46 to Compass Minerals International, Inc.’s Annual Report on Form 10-K for the annual period ended December 31, 2017).

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10.52+	Addendum to Claims Procedure, effective April 1, 2018, to Compass Minerals International, Inc. Restoration Plan, as amended and restated effective January 1, 2018 (incorporated by reference to Exhibit 10.2 to Compass Minerals International, Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2018).
10.53+	2020 Form of Change in Control Severance Agreement (incorporated by reference to Exhibit 10.4 to Compass Minerals International, Inc.’s Current Report on Form 8-K filed on May 19, 2020).
10.54+	2020 Form of Restrictive Covenant Agreement (incorporated by reference to Exhibit 10.5 to Compass Minerals International, Inc.’s Current Report on Form 8-K filed on May 19, 2020).
10.55+	Restricted Covenant Agreement, dated August 3, 2017, between Compass Minerals International, Inc. and Francis J. Malecha (incorporated herein by reference to Exhibit 10.2 to Compass Minerals International, Inc.’s Current Report on Form 8-K filed on August 4, 2017).
10.56+	Separation Letter Agreement, dated November 19, 2018, between Compass Minerals International, Inc. and Francis J. Malecha (incorporated herein by reference to Exhibit 10.1 to Compass Mineral International, Inc.’s Current Report on Form 8-K filed on November 19, 2018).
10.57+	Compass Minerals International, Inc. Executive Severance Plan, effective January 1, 2019 (incorporated herein by reference to Exhibit 10.1 to Compass Mineral International, Inc.’s Current Report on Form 8-K filed on December 19, 2018).
10.58+	Amended and Restated Compass Minerals International, Inc. Executive Severance Plan, effective May 15, 2020 (incorporated herein by reference to Exhibit 10.3 to Compass Mineral International, Inc.’s Current Report on Form 8-K filed on May 19, 2020).
10.59+	Employment Agreement, dated April 19, 2019, between Compass Minerals International, Inc. and Kevin S. Crutchfield (incorporated herein by reference to Exhibit 10.1 to Compass Minerals International, Inc.’s Current Report on Form 8-K filed on April 23, 2019).
10.60+	Letter Agreement, effective July 15, 2019, between Compass Minerals International, Inc. and George J. Schuller, Jr. (incorporated herein by reference to Exhibit 10.1 to Compass Minerals International, Inc.’s Current Report on Form 8-K filed on July 18, 2019).
10.61+	Form of Release between Compass Minerals International, Inc. and Anthony J. Sepich (incorporated herein by reference to Exhibit 10.2 to Compass Minerals International, Inc.’s Current Report on Form 8-K filed on July 18, 2019).
10.62+	Form of Release between Compass Minerals International, Inc. and Diana C. Toman (incorporated herein by reference to Exhibit 10.3 to Compass Minerals International, Inc.’s Current Report on Form 8-K filed on July 18, 2019).
10.63+	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).
10.64+	Final Release and Waiver of Claims, dated February 24, 2020, between Compass Minerals International, Inc. and Angela Y. Jones (incorporated herein by reference to Exhibit 10.1 to Compass Minerals International, Inc’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2020).
10.65+	Consulting Agreement, dated February 21, 2020, between Compass Minerals International, Inc. and Angela Y. Jones (incorporated herein by reference to Exhibit 10.2 to Compass Minerals International, Inc’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2020).
21.1*	Subsidiaries of the Registrant.
23.1*	Consent of Ernst & Young LLP.
24.1*	Power of Attorney.
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 Compass Minerals International, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2020, formatted in Extensive Business Reporting Language (XBRL): (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.
104**	Cover Page Interactive Data File (contained in Exhibit 101).

*    Filed herewith.

**    Furnished herewith.

+    Management contracts and compensatory plans or arrangements.

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ITEM 16.    FORM 10-K SUMMARY

None.

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SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) 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.
February 26, 2021	By:	/s/ James D. Standen
		James D. Standen
		Chief Financial Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities indicated on February 26, 2021.

	Signature	Capacity
	/s/ Kevin S. Crutchfield	President and CEO and Director
	Kevin S. Crutchfield	(Principal Executive Officer)
	/s/ James D. Standen	Chief Financial Officer
	James D. Standen	(Principal Financial and Accounting Officer)
	*	Director
	Valdemar L. Fischer
	*	Director
	Eric Ford
	*	Director
	Richard S. Grant
	*	Director
	Joseph E. Reece
	*	Director
	Allan R. Rothwell
	*	Director
	Lori A. Walker
	*	Director
	Paul S. Williams
	*	Director
	Amy J. Yoder
* By:	/s/ Mary L. Frontczak
	Mary L. Frontczak
	Attorney-in Fact

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EX-4.5

Exhibit 4.5

DESCRIPTION OF THE REGISTRANT’S SECURITIES

REGISTERED PURSUANT TO SECTION 12 OF THE

SECURITIES EXCHANGE ACT OF 1934

As of December 31, 2020, Compass Minerals International, Inc., a Delaware corporation (the “Company,” “we” or “our”), had one class of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”): common stock, $0.01 par value per share (our “Common Stock”).

The following is a brief description of our Common Stock and does not purport to be complete. The description is qualified in its entirety by reference to the Company’s Amended and Restated Certificate of Incorporation, as amended (our “Certificate”) and Amended and Restated By-Laws, as amended (our “By-Laws”), each of which are incorporated by reference as exhibits to the Annual Report on Form 10-K for the year ended December 31, 2020 of which this Exhibit 4.5 is a part, and the applicable provisions of the Delaware General Corporation Law (the “DGCL”). We encourage you to read our Certificate, our By-Laws, and the DGCL for additional information.

DESCRIPTION OF CAPITAL STOCK

General

The Company’s authorized capital stock consists of 200,000,000 shares of our Common Stock and 10,000,000 shares of preferred stock, par value $0.01 per share, 200,000 shares of which have been designated as Series A Junior Participating Preferred Stock. As of December 31, 2020, 33,959,338 shares of Common Stock and no shares of preferred stock were issued and outstanding.

Voting Rights

The holders of Common Stock are entitled to one vote for each share held of record on the applicable record date for all matters submitted to a vote of stockholders. Holders of preferred stock, if any, may be entitled to a greater number of votes per a share. Generally, matters to be voted on by stockholders must be approved by a majority of the votes cast. For the election of members to the Board of Directors of the Company (the “Board”), a nominee for director will be elected to the Board if the number of votes cast “for” the nominee’s election exceed the votes cast “against” the nominee’s election; provided, however, that, if the number of nominees for director exceeds the number of directors to be elected, directors will be elected by a plurality of the votes cast. The holders of Common Stock have no cumulative voting rights.

Dividends

Subject to any preferential rights of any outstanding shares of preferred stock, if any, holders of our Common Stock are entitled to receive dividends as may be declared by the Board out of funds legally available to pay dividends.

Liquidation

In the event of liquidation, dissolution or winding up of our affairs, whether voluntary or involuntary, holders of our Common Stock are entitled to share in any distribution of our assets after payment of liabilities, and the liquidation preference of any outstanding preferred stock, if any.

Other Rights

    The holders of the Common Stock have no preemptive rights to purchase or subscribe for any stock or other securities nor any conversion rights. There are no redemption, purchase, retirement or sinking fund provisions with respect to our Common Stock.

Fully Paid and Nonassessable

All of the outstanding shares of Common Stock are fully paid and nonassessable.

Listing

Our Common Stock is listed on the New York Stock Exchange under the ticker symbol “CMP.”

Transfer Agent and Registrar

     The transfer agent and registrar for our Common Stock is ComputerShare Trust Company, N.A.

Preferred Stock

Our Certificate authorizes the Board to issue from time to time up to an aggregate of 10,000,000 shares of preferred stock in one or more series without further stockholder approval. The Board is authorized, without further stockholder approval, to fix or alter the designations, preferences, rights and any qualifications, limitations or restrictions of the shares of each such series, including the dividend rights, dividend rates, conversion rights, voting rights, terms of redemption (including sinking fund provisions), redemption price or prices, liquidation preferences and the number of shares constituting any series or designations of such series.

Anti-Takeover Effects of Provisions in our Certificate, our By-Laws and the DGCL

Provisions in Our Certificate and Our By-Laws

Certain provisions contained in our Certificate and our By-Laws may be deemed to have an anti-takeover effect or may delay, defer or prevent a tender offer or takeover attempt that a stockholder might consider in the stockholder's best interests, including those attempts that might result in a premium being paid over the market price for the shares held by a stockholder.

•Size of Board: The size of the Board is determined by the Board, provided that the number of directors must be at least three persons.

•Director Vacancies: Vacancies on the Board, including vacancies resulting from an enlargement of the Board, are filled only by vote of a majority of our directors then in office, even if less than a quorum remains on the Board.

•Stockholder Action:Any action required or permitted to be taken by the Company’s stockholders must be effected at a duly called annual or special meeting of stockholders and may not be effected by written consent.

•Special Meetings:Special meetings of stockholders can only be called by the Board, the President or the Chairman of the Board.

2

•Advance Notice Requirements for Stockholder Action:Our By-Laws contain provisions requiring advance notice be delivered to the Company of any business to be brought by a stockholder before an annual meeting and providing for procedures to be followed by stockholders in nominating persons for election to the Board. Stockholders at an annual meeting can only consider proposals or nominations specified in the notice of meeting or brought before the meeting by or at the direction of the Board or by a stockholder of record on the record date for the meeting, entitled to vote at the meeting and who has delivered timely written notice in proper form to the secretary of the stockholder's intention to bring such business before the meeting. These provisions may have the effect of delaying until the next stockholder meeting stockholder actions that are favored by the holders of a majority of our Common Stock.

•Issuance of Preferred Stock:The Board may by resolution establish one or more series of preferred stock, having such number of shares, designation, relative voting rights, dividend rates, liquidation or other rights, preferences and limitations as may be fixed by the Board without any further stockholder approval. Such rights, preferences, privileges and limitations may have the effect of impeding or discouraging the acquisition or control of the Company.

Provisions in the DGCL

Our Certificate expressly states that we have elected not to be governed by Section 203 of the DGCL, which prohibits a publicly held Delaware corporation from engaging in a “business combination” with an “interested stockholder” for a period of three years after the time the stockholder became an interested stockholder, subject to certain exceptions, including if, prior to such time, the board of such corporation approved the business combination or the transaction which resulted in the stockholder becoming an interested stockholder. “Business combinations” include mergers, asset sales and other transactions resulting in a financial benefit to the “interested stockholder.” Subject to various exceptions, an “interested stockholder” is a person who, together with his or her affiliates and associates, owns, or within three years did own, 15% or more of the corporation’s outstanding voting stock. These restrictions generally prohibit or delay the accomplishment of mergers or other takeover or change-in-control attempts that are not approved by a company’s board. Although we have elected to opt out of the statute’s provisions, we could elect to be subject to Section 203 in the future.

3

EX-10.23

Exhibit 10.23

Summary of Non-Employee Director Compensation

As of January 1, 2021

The following compensation will be provided to non-employee members of the Board of Directors (the “Board”) of Compass Minerals International, Inc. (the “Company”) pursuant to the Company’s Non-Employee Director Compensation Policy.

A.Cash Compensation

1.Annual Retainer. Each non-employee director will receive a $75,000 annual cash retainer for service on the Board.

2.Committee Service Fee. In addition, each non-employee director serving as a chair or member of any of the following Board committees will receive an annual cash fee for committee service, as follows:

Committee	Chair	Members
Audit Committee	$22,500	$10,000
Compensation Committee	$15,000	$7,500
Nominating/Corporate Governance Committee	$12,500	$5,000
Environmental, Health & Safety Committee	$12,500	$5,000

3. Non-Executive Chairman of the Board. In addition, the Non-Executive Chairman of the Board will receive an annual cash fee of $65,000 for service as Non-Executive Chairman of the Board.

B.Equity Compensation.

1.Annual Equity Award. Each non-employee director will receive an equity award with an annual equity award value of $115,000 for service on the Board.

2.Non-Executive Chairman of the Board. In addition, the Non-Executive Chairman of the Board will receive an equity award with an annual equity award value of $55,000 for service as Non-Executive Chairman of the Board.

EX-21.1

Exhibit 21.1

Compass Minerals International, Inc.

List of Subsidiaries as of December 31, 2020

Company Name	Jurisdiction of Incorporation
Clyman Bay Resources, Inc.	Delaware, U.S.
CMI Nova Scotia Company	Nova Scotia, Canada
CMP Canada Inc.	Nova Scotia, Canada
CMP Capital, Inc.	Delaware, U.S.
CMPQ Igarassu Participações Ltda.	Brazil
CMUK DB Trustee Company Limited	England and Wales
Compass Canada Limited Partnership	Ontario, Canada
Compass Canada Potash Holdings Inc.	Saskatchewan, Canada
Compass Cayman Holdings Ltd.	Cayman Islands
Compass Minerals (Europe) Limited	England and Wales
Compass Minerals America Inc.	Delaware, U.S.
Compass Minerals América do Sul Indústria e Comércio S.A.	Brazil
Compass Minerals Canada Corp.	Nova Scotia, Canada
Compass Minerals Chile Limitada	Chile
Compass Minerals do Brasil Ltda.	Brazil
Compass Minerals Europe B.V.	Netherlands
Compass Minerals International Limited Partnership	Ontario, Canada
Compass Minerals Louisiana Inc.	Delaware, U.S.
Compass Minerals Manitoba Inc.	Manitoba, Canada
Compass Minerals Nordeste Indústria e Comércio Ltda.	Brazil
Compass Minerals Nova Scotia Company	Nova Scotia, Canada
Compass Minerals Ogden Inc.	Delaware, U.S.
Compass Minerals Receivables LLC	Delaware, U.S.
Compass Minerals Storage & Archives Limited	England and Wales
Compass Minerals Sudeste Indústria e Comércio Ltda.	Brazil
Compass Minerals UK Holdings Limited	England and Wales
Compass Minerals UK Limited	England and Wales
Compass Minerals USA Inc.	Delaware, U.S.
Compass Minerals Wynyard Inc.	Saskatchewan, Canada
Compass Resources Canada Company	Nova Scotia, Canada
Compass South American Salt Holdings Ltd.	Cayman Islands
Curlew Valley Farms, LLC	Utah, U.S.
DeepStore Holdings Limited	England and Wales
DeepStore Limited	England and Wales
Dove Creek Grazing, LLC	Utah, U.S.
Great Salt Lake Holdings, LLC	Delaware, U.S.
GSL Corporation	Delaware, U.S.
Mixmicro Indústria e Comércio de Produtos Químicos Ltda.	Brazil
NAMSCO Inc.	Delaware, U.S.
NASC Nova Scotia Company	Nova Scotia, Canada
Salt Union Limited	England and Wales
Wolf Trax Europe Limited	England and Wales
Wolf Trax Holdings Inc.	Delaware, U.S.
Wolf Trax USA Inc.	Delaware, U.S.

EX-23.1

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the following Registration Statements:

(1)Registration Statement (Form S-8 No. 333-119410) of Compass Minerals International, Inc. Directors’ Deferred Compensation Plan,

(2)Registration Statement (Form S-8 No. 333-121965) of Compass Minerals International, Inc. Savings Plan,

(3)Registration Statement (Form S-8 No. 333-127699) of Compass Minerals International, Inc. 2005 Incentive Award Plan,

(4)Registration Statement (Form S-8 333-203922) of Compass Minerals International, Inc. 2015 Incentive Award Plan, and

(5)Registration Statement (Form S-8 333-23852) of Compass Minerals International, Inc. 2020 Incentive Award Plan;

of our reports dated February 26, 2021, with respect to the consolidated financial statements and schedule of Compass Minerals International, Inc., and the effectiveness of internal control over financial reporting of Compass Minerals International, Inc., included in its Annual Report (Form 10-K) for the year ended December 31, 2020.

/s/ Ernst & Young LLP

February 26, 2021

Kansas City, Missouri

EX-24.1

Exhibit 24.1

COMPASS MINERALS INTERNATIONAL, INC.

ANNUAL REPORT ON FORM 10-K

POWER OF ATTORNEY

Each of the undersigned, being a director of Compass Minerals International, Inc., a Delaware corporation (the “Company”), which anticipates filing with the Securities and Exchange Commission (the “SEC”) pursuant to the provisions of the Securities Exchange Act of 1934, as amended, an Annual Report on Form 10-K (the “Annual Report”) for the fiscal year ended December 31, 2020 (together with any and all subsequent amendments), does hereby constitute and appoint Mary L. Frontczak and Zoe A. Vantzos, and each of them, his or her true and lawful attorneys-in-fact, with full power of substitution and resubstitution, to execute and file on behalf of the undersigned, in his or her capacity as a director of the Company, the Annual Report and any and all other documents to be filed with the SEC pertaining to the Annual Report with full power and authority to do and perform any and all acts and things whatsoever required or necessary to be done in the premises, as fully as to all intents and purposes as he or she could do if personally present, hereby ratifying, approving and confirming all that said attorneys-in-fact, or any of them, or their or his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Executed on this 22nd day of February, 2021.

/s/ Valdemar L. Fischer

Valdemar L. Fischer

/s/ Eric Ford

Eric Ford

/s/ Richard S. Grant

Richard S. Grant

/s/ Joseph E. Reece

Joseph E. Reece

/s/ Allan R. Rothwell

Allan R. Rothwell

/s/ Lori A. Walker

Lori A. Walker

/s/ Paul S. Williams

Paul S. Williams

/s/ Amy J. Yoder

Amy J. Yoder

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Kevin S. Crutchfield, certify that:

1.    I have reviewed this annual report on Form 10-K 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: February 26, 2021	/s/ Kevin S. Crutchfield
	Kevin S. Crutchfield
	President and CEO

EX-31.2

Exhibit 31.2

CERTIFICATION

I, James D. Standen, certify that:

1.    I have reviewed this annual report on Form 10-K 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: February 26, 2021	/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 annual report on Form 10-K for the period ended December 31, 2020, 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 and 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.

	COMPASS MINERALS INTERNATIONAL, INC.
February 26, 2021	/s/ Kevin S. Crutchfield
	Kevin S. Crutchfield
	President and CEO
February 26, 2021	/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 utilize a multi-faceted approach towards world class safety performance. This approach includes (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 legally contest any enforcement action or related penalty we receive. 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 quarterly period ended December 31, 2020 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 applies to our operations regulated by the U.S. Mine Safety and Health Administration.

Mine Name/ Mine I.D. Number	Section 104 S&S Citations and Orders1	Section 104(b) Orders2	Section 104(d) Citations or 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 Period7	Legal Actions Initiated During Period	Legal Actions Resolved During Period8
Cote Blanche Mine/ 16-00358	4	0	0	0	0	$1,523	0	No	2	0	1

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.

7 Represents two civil penalty proceedings involving the contest of Citation No. 8966039 and Citation No. 9457597 as well as the related civil penalties.

8 Represents one legal action involving complaints of discharge, discrimination or interference.

XML

Cover - USD ($)

12 Months Ended

Dec. 31, 2020

Feb. 23, 2021

Jun. 30, 2020

Cover [Abstract]

Document Type

10-K

Document Annual Report

true

Current Fiscal Year End Date

--12-31

Document Period End Date

Dec. 31, 2020

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, Suite 100

Entity Address, Postal Zip Code

66210

Entity Address, City or Town

Overland Park,

Entity Address, State or Province

KS

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 Well-known Seasoned Issuer

Yes

Entity Voluntary Filers

No

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

ICFR Auditor Attestation Flag

true

Entity Shell Company

false

Entity Public Float

$ 1,653,658,110

Entity Common Stock, Shares Outstanding

33,974,215

Documents Incorporated by Reference

Document	Parts into which Incorporated
Portions of the Proxy Statement for the Annual Meeting of Stockholders to be held May 18, 2021	Part III, Items 10, 11, 12, 13 and 14

Entity Central Index Key

0001227654

Document Fiscal Year Focus

2020

Document Fiscal Period Focus

FY

Amendment Flag

false

XML

Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 21.0	$ 34.7
Receivables, less allowance for doubtful accounts of $11.1 in 2020 and $10.7 in 2019	296.7	342.4
Inventories	370.6	311.5
Other	68.9	96.4
Total current assets	757.2	785.0
Property, plant and equipment, net	964.9	1,030.8
Intangible assets, net	85.0	103.0
Goodwill	281.3	343.0
Investment in equity investee	20.0	24.9
Other	154.0	156.5
Total assets	2,262.4	2,443.2
Current liabilities:
Current portion of long-term debt	63.7	52.1
Accounts payable	116.8	126.2
Accrued salaries and wages	38.7	34.4
Income taxes payable	5.5	10.4
Accrued interest	10.4	11.3
Accrued expenses and other current liabilities	61.2	61.5
Total current liabilities	296.3	295.9
Long-term debt, net of current portion	1,337.7	1,363.9
Deferred income taxes, net	87.5	89.9
Other noncurrent liabilities	153.9	163.9
Commitments and contingencies (Note 12)
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	127.0	117.1
Treasury stock, at cost — 1,407,926 shares at December 31, 2020 and 1,481,611 shares at December 31, 2019	(4.4)	(3.2)
Retained earnings	567.3	607.4
Accumulated other comprehensive loss	(303.3)	(192.1)
Total stockholders' equity	387.0	529.6
Total liabilities and stockholders' equity	$ 2,262.4	$ 2,443.2

XML

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Allowance for doubtful accounts	$ 11.1	$ 10.7
Stockholders' equity:
Common stock, par value (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)	1,407,926	1,481,611

XML

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Sales	$ 1,373.5	$ 1,490.5	$ 1,493.6
Gross profit	312.3	336.8	293.9
Selling, general and administrative expenses	171.8	173.2	163.6
Operating earnings	140.5	163.6	130.3
Other expense (income):
Interest expense	71.2	68.4	62.5
Net earnings in equity investee	(1.4)	(0.7)	(1.0)
(Gain) loss on foreign exchange	(0.4)	13.0	(5.8)
Other, net	(0.1)	(1.7)	(3.0)
Earnings before income taxes	71.2	84.6	77.6
Income tax expense	11.7	22.1	8.8
Net earnings	$ 59.5	$ 62.5	$ 68.8
Basic net earnings per common share (in dollars per share)	$ 1.72	$ 1.82	$ 2.02
Diluted net earnings per common share (in dollars per share)	$ 1.72	$ 1.81	$ 2.02
Weighted-average common shares outstanding (in thousands):
Basic (in shares)	33,928	33,882	33,848
Diluted (in shares)	33,928	33,882	33,848
Shipping and handling cost
Cost of goods and services	$ 266.6	$ 312.5	$ 320.0
Product cost
Cost of goods and services	$ 794.6	$ 841.2	$ 879.7

XML

Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net earnings	$ 59.5	$ 62.5	$ 68.8
Other comprehensive (loss) income:
Unrealized loss from change in pension costs, net of tax of $0.8, $0.5 and $0.1 in 2020, 2019 and 2018, respectively	(2.5)	(2.4)	(0.6)
Unrealized gain on cash flow hedges, net of tax of $(0.3), $(0.1) and $(0.2) in 2020, 2019 and 2018, respectively	0.8	0.1	0.4
Cumulative translation adjustment	(109.5)	21.1	(132.6)
Comprehensive (loss) income	$ (51.7)	$ 81.3	$ (64.0)

XML

Consolidated Statements of Comprehensive (Loss) Income (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Unrealized loss from change in pension costs, tax	$ 0.8	$ 0.5	$ 0.1
Unrealized gain on cash flow hedges, tax	$ (0.3)	$ (0.1)	$ (0.2)

XML

Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Total	Cumulative effect of change in accounting principle	Common Stock	Additional Paid-In Capital	Treasury Stock	Retained Earnings	Retained Earnings Cumulative effect of change in accounting principle	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)	$ (64.0)					68.8		(132.8)
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201602Member
Stranded tax effect from tax reform	$ 0.0					0.2		(0.2)
Dividends on common stock/equity awards	(97.7)			0.3		(98.0)
Stock-based compensation	7.3			7.3
Ending balance at Dec. 31, 2018	540.2	$ (0.1)	0.4	110.1	(2.9)	643.5	$ (0.1)	(210.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	81.3					62.5		18.8
Dividends on common stock/equity awards	(98.1)			0.4		(98.5)
Stock-based compensation	6.6			6.6
Shares issued for stock units, net of shares withheld for taxes	(0.3)				(0.3)
Ending balance at Dec. 31, 2019	529.6		0.4	117.1	(3.2)	607.4		(192.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	(51.7)					59.5		(111.2)
Dividends on common stock/equity awards	(99.1)			0.5		(99.6)
Stock-based compensation	9.4			9.4
Shares issued for stock units, net of shares withheld for taxes	(1.1)				(1.1)
Stock options exercised, net of shares withheld for taxes	(0.1)				(0.1)
Ending balance at Dec. 31, 2020	$ 387.0		$ 0.4	$ 127.0	$ (4.4)	$ 567.3		$ (303.3)

XML

Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Stockholders' Equity [Abstract]
Dividends on common stock/equity awards (in dollars per share)	$ 2.88	$ 2.88	$ 2.88

XML

Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net earnings	$ 59.5	$ 62.5	$ 68.8
Adjustments to reconcile net earnings to net cash flows provided by operating activities:
Depreciation, depletion and amortization	137.9	137.9	136.9
Finance fee amortization	3.2	2.8	2.2
Refinancing of long-term debt	0.1	0.3	0.0
Stock-based compensation	9.4	6.3	7.8
Deferred income taxes	5.4	(11.8)	(16.7)
Net earnings in equity investee	(1.4)	(0.7)	(1.0)
Unrealized foreign exchange (gain) loss	(2.8)	15.0	0.1
Other, net	6.8	7.2	4.1
Changes in operating assets and liabilities:
Receivables	19.5	(31.3)	16.4
Inventories	(71.4)	(45.4)	(16.8)
Other assets	21.1	23.9	(18.4)
Accounts payable and accrued expenses and other current liabilities	(3.7)	(12.1)	21.1
Other liabilities	(8.4)	5.0	(22.2)
Net cash provided by operating activities	175.2	159.6	182.3
Cash flows from investing activities:
Capital expenditures	(84.9)	(98.1)	(96.8)
Other, net	(3.3)	(2.3)	(2.8)
Net cash used in investing activities	(88.2)	(100.4)	(99.6)
Cash flows from financing activities:
Proceeds from revolving credit facility borrowings	300.0	574.1	457.4
Principal payments on revolving credit facility borrowings	(329.7)	(611.1)	(429.1)
Proceeds from issuance of long-term debt	115.8	1,001.8	54.3
Principal payments on long-term debt	(79.2)	(902.8)	(68.1)
Dividends paid	(99.1)	(98.1)	(97.7)
Deferred financing costs	(1.0)	(12.8)	(1.7)
Shares withheld to satisfy employee tax obligations	(1.1)	(0.3)	0.0
Other, net	(1.9)	(1.3)	(1.0)
Net cash used in financing activities	(96.2)	(50.5)	(85.9)
Effect of exchange rate changes on cash and cash equivalents	(4.5)	(1.0)	(6.4)
Net change in cash and cash equivalents	(13.7)	7.7	(9.6)
Cash and cash equivalents, beginning of the year	34.7	27.0	36.6
Cash and cash equivalents, end of period	21.0	34.7	27.0
Supplemental cash flow information:
Interest paid, net of amounts capitalized	65.0	60.7	52.1
Income taxes paid, net of refunds	$ (10.3)	$ 33.9	$ 38.3

XML

ORGANIZATION AND FORMATION

12 Months Ended

Dec. 31, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

ORGANIZATION AND FORMATION

ORGANIZATION AND FORMATION

Compass Minerals International, Inc. (“CMI”), through its subsidiaries (collectively, “CMP,” “Compass Minerals” or the “Company”), is a leading producer of essential minerals focused on safely delivering where and when it matters to help solve nature’s challenges for customers and communities. Its salt products help keep roadways safe during winter weather and are used in numerous other consumer, industrial and agricultural applications. Its plant nutrition business manufactures an innovative and diverse portfolio of products that improve the quality and yield of crops, while supporting sustainable agriculture. Additionally, its specialty chemical business serves the water treatment industry and other industrial processes. The Company’s principal products are salt, consisting of sodium chloride and magnesium chloride, sulfate of potash (“SOP”), secondary nutrients and micronutrients; and specialty chemicals. The Company’s production sites are located in the United States (“U.S.”), Canada, Brazil and the United Kingdom (“U.K.”). The Company also provides records management services in the U.K.

CMI is a holding company with no operations other than those of its subsidiaries.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

a. Management Estimates:

The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) as included in the Accounting Standards Codification requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates.

b. Basis of Consolidation:

The Company’s consolidated financial statements include the accounts of CMI and its wholly-owned domestic and foreign subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation.

c. Reclassifications:

The Company has made reclassifications of prior year amounts in Consolidated Statements of Operations to conform to current year presentation.

d. Foreign Currency:

Assets and liabilities are translated into U.S. dollars at end of period exchange rates. Revenues and expenses are translated using the monthly average rates of exchange during the year. Adjustments resulting from the translation of foreign-currency financial statements into the reporting currency, U.S. dollars, are included in accumulated other comprehensive loss. The Company recorded foreign exchange losses of $(72.6) million, $(1.2) million and $(56.5) million in 2020, 2019 and 2018, respectively, in accumulated other comprehensive loss related to intercompany notes which were deemed to be of long-term investment nature. Aggregate exchange (gains) losses from transactions denominated in a currency other than the functional currency, which are included in other expense (income), for the years ended December 31, 2020, 2019 and 2018, were $(0.4) million, $13.0 million and $(5.8) million, respectively.

e. Revenue Recognition:

The Financial Accounting Standards Board (the “FASB”) revenue recognition guidance provides a single, comprehensive model for recognizing revenue from contracts with customers. The revenue recognition model requires revenue to be recognized upon the transfer of promised goods or services to customers in an amount that reflects the consideration an entity expects to receive in exchange for those goods or services. The Company’s revenue arrangements generally consist of a single performance obligation to transfer promised goods or services. Accordingly, substantially all of the Company’s revenue is recognized at a point in time when control of the goods transfers to the customer.

The Company typically recognizes revenue at the time of shipment to the customer, which coincides with the transfer of title and risk of ownership to the customer. Sales represent billings to customers net of sales taxes charged for the sale of the product. Sales include amounts charged to customers for shipping and handling costs, which are expensed when the related product is sold.

f. Cash and Cash Equivalents:

The Company considers all investments with original maturities of three months or less to be cash equivalents. The Company maintains the majority of its cash in bank deposit accounts with several commercial banks with high credit ratings in the U.S., Canada, Brazil and Europe. Typically, the Company has bank deposits in excess of federally insured limits. Currently, the Company does not believe it is exposed to significant credit risk on its cash and cash equivalents.

g. Accounts Receivable and Allowance for Doubtful Accounts:

Receivables consist almost entirely of trade accounts receivable. Trade accounts receivable are recorded at the invoiced amount and do not bear interest. The allowance for doubtful accounts is the Company’s best estimate of the amount of probable credit losses in its existing trade accounts receivable. The Company determines the allowance based on historical write-off experience by business line and a current assessment of its portfolio, including information regarding individual customers. The Company reviews its past due account balances for collectability and adjusts its allowance for doubtful accounts accordingly. Account balances are charged off against the allowance when the Company believes it is probable that the trade accounts receivable will not be recovered.

During 2020, the Company sold approximately $22.1 million of Brazilian trade accounts receivable for $21.0 million. The proceeds of the transaction were used to maintain liquidity for working capital needs. The Company is contingently liable for up to 20% of the sale balance up to $4.1 million if the banks are unable to collect on these accounts.

During 2019, the Company sold approximately $16.4 million of trade accounts receivable for $15.6 million. The proceeds of these transactions were used to refinance Brazilian loans (see Note 10). The Company is contingently liable for up to 20% of the sale balance up to $2.7 million if the banks are unable to collect on these accounts. During 2018, the Company sold approximately $32.7 million of trade accounts receivable for $30.4 million. The Company does not believe the amount which may ultimately be payable for any unpaid receivables to be material to its consolidated financial statements. The Company has no further involvement with these accounts.

h. Inventories:

Inventories are stated at the lower of cost or net realizable value. Finished goods and raw material and supply costs are valued using the average cost method on a first-in-first-out basis. Raw materials and supply costs primarily consist of raw materials purchased to aid in the production of mineral and chemical products, maintenance materials and packaging materials. Finished goods are primarily comprised of salt, magnesium chloride, and plant nutrition and chemical products readily available for sale. Substantially all costs associated with the production of finished goods at the Company’s production locations are captured as inventory costs. As required by U.S. GAAP, a portion of the fixed costs at a location are not included in inventory and are expensed as a product cost if production at that location is determined to be abnormally low in any period. Additionally, since the Company’s products are often stored at third-party warehousing locations, the Company includes in the cost of inventory the freight and handling costs necessary to move the product to storage until the product is sold to a customer.

i. Other Current Assets:

In the fourth quarter of 2015, the Company began marketing certain assets used in farming operations. Management remains committed to sell these assets, and the assets continue to be marketed at a reasonable price. The Company has performed an impairment analysis and concluded that the fair market value of these assets exceeds their carrying value. These assets have been recorded in other current assets in the Consolidated Balance Sheets as of December 31, 2020 and 2019. The amounts classified as held for sale as of December 31, 2020 and 2019, of $6.8 million and $7.2 million, respectively, include water rights of approximately $5.2 million with the remaining balance consisting of property, plant and equipment. In February 2021, the Company completed the sale of the remaining assets and any gain or loss recognized is expected to be immaterial. In addition, other current assets as of December 31, 2020 and 2019, include $2.8 million and $58.3 million, respectively, of tax refunds from U.S. taxing authorities pursuant to the tax settlement with Canadian and U.S. tax authorities described in Note 8. The remaining other amounts included in other current assets as of December 31, 2020 and 2019, respectively, consist principally of prepaid expenses.

j. Property, Plant and Equipment:

Property, plant and equipment is stated at cost and includes capitalized interest. The costs of replacements or renewals, which improve or extend the life of existing property, are capitalized. Maintenance and repairs are expensed as incurred. Upon retirement or disposition of an asset, any resulting gain or loss is included in the Company’s operating results.

Property, plant and equipment also includes mineral interests. The mineral interests for the Company’s Winsford U.K. mine are owned. The Company leases probable mineral reserves at its Cote Blanche and Goderich mines, its Ogden facility and several of its other North American facilities. These leases have varying terms, and many provide for a royalty payment to the lessor based on a specific amount per ton of mineral extracted or as a percentage of sales. The Company’s rights to extract minerals are contractually limited by time. The Cote Blanche mine is operated under land and mineral leases, and the mineral lease expires in 2060 with two additional 25-year renewal periods. The Goderich mine mineral reserve lease expires in 2022

with the Company’s option to renew until 2043 after demonstrating to the lessor that the mine’s useful life is greater than the lease’s term. The Ogden facility mineral reserve lease renews annually. The Company believes it will be able to continue to extend lease agreements as it has in the past, at commercially reasonable terms, without incurring substantial costs or material modifications to the existing lease terms and conditions, and therefore, management believes that assigned lives are appropriate. The Company’s mineral interests are depleted on a units-of-production basis based upon the latest available mineral study. The weighted average amortization period for the leased probable mineral reserves is 90 years as of December 31, 2020. The Company also owns other mineral properties. The weighted average life for the probable owned mineral reserves is 36 years as of December 31, 2020, based upon management’s current production estimates.

Buildings and structures are depreciated on a straight-line basis over lives generally ranging from 10 to 30 years. Portable buildings generally have shorter lives than permanent structures. Leasehold and building improvements typically have shorter estimated lives of 5 to 20 years or lower based on the life of the lease to which the improvement relates.

The Company’s fixed assets are amortized on a straight-line basis over their respective lives. The following table summarizes the estimated useful lives of the Company’s different classes of property, plant and equipment:

	Years
Land improvements	10 to 25
Buildings and structures	10 to 30
Leasehold and building improvements	2 to 40
Machinery and equipment – vehicles	2 to 10
Machinery and equipment – other mining and production	2 to 50
Office furniture and equipment	2 to 10
Mineral interests	20 to 99

The Company has finance leases which are recorded in property, plant and equipment at the beginning of the lease at the lower of the fair value of the leased property or the present value of the minimum lease payments. Lease payments are recorded as interest expense and a reduction of the lease liability. A finance lease asset is depreciated over the lower of its useful life or the lease term.

The Company has capitalized computer software costs of $13.4 million and $16.0 million as of December 31, 2020 and 2019, respectively, recorded in property, plant and equipment. The capitalized costs are being amortized over five years. The Company recorded $5.8 million, $6.6 million and $7.3 million of amortization expense related to capitalized computer software for 2020, 2019 and 2018, respectively.

The Company recognizes and measures obligations related to the retirement of tangible long-lived assets in accordance with applicable U.S. GAAP. Asset retirement obligations are not material to the Company’s consolidated financial position, results of operations or cash flows.

The Company reviews its long-lived assets and the related mineral reserves for impairment whenever events or changes in circumstances indicate the carrying amounts of such assets may not be recoverable. If an indication of a potential impairment exists, recoverability of the respective assets is determined by comparing the forecasted undiscounted net cash flows of the operation to which the assets relate, to the carrying amount, including associated intangible assets, of such operation. If the operation is determined to be unable to recover the carrying amount of its assets, then intangible assets are written down first, followed by the other long-lived assets of the operation, to fair value. Fair value is determined based on discounted cash flows or appraised values, depending upon the nature of the assets.

 k. 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 adopted this guidance on January 1, 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 elected the 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. Refer to Note 4 for additional details.

l. Goodwill and Intangible Assets:

The Company amortizes its intangible assets deemed to have finite lives on a straight-line basis over their estimated useful lives which, for the Company, range from 4 to 50 years. The Company reviews goodwill and other indefinite-lived intangible

assets annually for impairment. In addition, goodwill and other intangible assets are reviewed when an event or change in circumstances indicates the carrying amounts of such assets may not be recoverable.

m. 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. The Company may recognize its share of an investee’s earnings on a lag, if an investee’s financial results are not available in a timely manner.

The Company’s Brazilian subsidiary holds a 50% interest in Fermavi Eletroquímica Ltda. (“Fermavi”). Fermavi, which was founded in 1987, is a Brazilian corporation with headquarters in Varginha, Minas Gerais, Brazil, and its operations focus on the production and sale of manganese-based products. The Company’s investment in Fermavi was recorded at its estimated fair value in conjunction with the purchase price allocation as of the date the Company completed the full acquisition of Compass Minerals América do Sul Indústria e Comércio Ltda. (“Compass Minerals South America”), which was in excess of the book value of net assets acquired. This basis difference was approximately $2 million and $4 million as of December 31, 2020 and 2019, respectively. The portion of the basis differences related to tangible and intangible assets is amortized over their remaining useful lives, as appropriate. The Company accounts for its investment in Fermavi under the equity method of accounting.

n. Other Noncurrent Assets:

Other noncurrent assets include certain inventories of spare parts and related inventory, net of reserve, of $27.9 million and $31.0 million at December 31, 2020 and 2019, respectively, which will be utilized with respect to long-lived assets. As of December 31, 2020 and 2019, other noncurrent assets also include net operating lease assets of $55.6 million and $53.7 million, respectively.

The Company sponsors a non-qualified defined contribution plan for certain of its executive officers and key employees as described in Note 9. As of December 31, 2020 and 2019, investments in marketable securities representing amounts deferred by employees, Company contributions and unrealized gains or losses totaling $1.9 million and $1.4 million, respectively, were included in other noncurrent assets in the Consolidated Balance Sheets. The marketable securities are classified as trading securities and accordingly, gains and losses are recorded as a component of other expense (income), net in the Consolidated Statements of Operations.

o. Income Taxes:

The Company accounts for income taxes using the liability method in accordance with the provisions of GAAP. Under the liability method, deferred taxes are determined based on the differences between the consolidated financial statements and the tax basis of assets and liabilities using enacted tax rates in effect in the years in which the differences are expected to reverse. The Company’s foreign subsidiaries file separate company returns in their respective jurisdictions.

The Company recognizes potential liabilities in accordance with applicable GAAP for anticipated tax issues in the U.S. and other tax jurisdictions based on its estimate of whether, and the extent to which, additional taxes will be due. If payment of these amounts ultimately proves to be unnecessary, the reversal of the liabilities would result in tax benefits being recognized in the period when the Company determines the liabilities are no longer necessary. If the Company’s estimate of tax liabilities proves to be less than the ultimate assessment, a further charge to expense would result. Any penalties and interest that are accrued on the Company’s uncertain tax positions are included as a component of income tax expense.

In evaluating the Company’s ability to realize deferred tax assets, the Company considers the sources and timing of taxable income, including the reversal of existing temporary differences, the ability to carryback tax attributes to prior periods, qualifying tax-planning strategies, and estimates of future taxable income exclusive of reversing temporary differences. In determining future taxable income, the Company’s assumptions include the amount of pre-tax operating income according to different state, federal and international taxing jurisdictions, the origination of future temporary differences, and the implementation of feasible and prudent tax-planning strategies.

If the Company determines that a portion of its deferred tax assets will not be realized, a valuation allowance is recorded in the period that such determination is made. In the future, if the Company determines, based on the existence of sufficient evidence, that more or less of the deferred tax assets are more likely than not to be realized, an adjustment to the valuation allowance will be made in the period such a determination is made.

As discussed in Note 8, on December 22, 2017, the U.S. enacted the Tax Cuts and Jobs Act (the “Act”) which subjects U.S. shareholders, including the Company, to tax on Global Intangible Low-Taxed Income (“GILTI”) earned by certain foreign subsidiaries. The FASB issued guidance stating that an entity can make an accounting policy election to either recognize deferred taxes for temporary basis differences expected to reverse as GILTI in future years or to provide for the tax expense related to GILTI in the year the tax is incurred as a period expense only. The Company has elected to account for GILTI as a period expense only.

p. Environmental Costs:

Environmental costs, other than those of a capital nature, are accrued at the time the exposure becomes known and costs can be reasonably estimated. Costs are accrued based upon management’s estimates of all direct costs. Amounts reserved for environmental matters were not material at December 31, 2020 or 2019.

q. Equity Compensation Plans:

The Company has equity compensation plans under the oversight of the Company’s Board of Directors, whereby stock options, restricted stock units, performance stock units, deferred stock units and shares of common stock are granted to the Company’s employees and directors. See Note 13 for additional discussion.

r. Earnings per Share:

When calculating earnings per share, the Company’s participating securities are accounted for under the two-class method. The two-class method requires allocating the Company’s net earnings to both common shares and participating securities based upon their rights to receive dividends. Basic earnings per share is computed by dividing net earnings available to common stockholders by the weighted-average number of outstanding common shares during the period. Diluted earnings per share reflects the potential dilution that could occur under the more dilutive of either the treasury stock method or the two-class method for calculating the weighted-average number of outstanding common shares. The treasury stock method is calculated assuming unrecognized compensation expense, income tax benefits and proceeds from the potential exercise of employee stock options are used to repurchase common stock.

s. Derivatives:

The Company is exposed to the impact of fluctuations in foreign exchange and interest rates on its borrowings and fluctuations in the purchase price of natural gas consumed in operations. The Company hedges portions of these risks through the use of derivative agreements.

The Company records derivative financial instruments as assets or liabilities measured at fair value. Accounting for the changes in the fair value of a derivative depends on its designation and effectiveness. 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. For qualifying hedges, the effective portion of 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 Consolidated Statements of Operations. Until the effective portion of a derivative’s change in fair value is recognized in the Consolidated Statements of Operations, the change in fair value is recognized in other comprehensive income. For derivative instruments that are not accounted for as hedges, or for the ineffective portions of qualifying hedges, the change in fair value is recorded through earnings in the period of change. The Company formally documents, designates and assesses the effectiveness of transactions that receive hedge accounting treatment initially and on an ongoing basis.

t. Concentration of Credit Risk:

The Company sells its salt and magnesium chloride products to various governmental agencies, manufacturers, distributors and retailers primarily in the Midwestern U.S. and throughout Canada and the U.K. The Company’s plant nutrition products are sold across the Western Hemisphere and globally. No single customer or group of affiliated customers accounted for more than 10% of the Company’s sales in any year during the three-year period ended December 31, 2020, or more than 10% of receivables at December 31, 2020 or 2019.

u. Recent Accounting Pronouncements:

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 adoption of this guidance on January 1, 2020, did not have an impact on the Company’s consolidated financial statements.

On January 1, 2020, the Company adopted guidance issued by the FASB related to credit losses for financial instruments, which replaces the incurred loss methodology with a current expected credit loss methodology (“CECL”). The Company has determined that its receivables are the only financial instrument that is within scope of this CECL guidance. The CECL methodology requires financial assets to be recorded at the net amount expected to be collected over the lifetime of the asset such that the estimated losses are accrued on the day the asset is acquired. The CECL methodology also requires financial assets to be aggregated and evaluated within pools with similar risk characteristics.

The Company has recorded an allowance on its receivables based on historical loss rates modified to consider supportable forecasts related to customer-specific and macroeconomic factors. For instance, the Company’s 2020 allowance for doubtful

accounts considered the potential impact that the COVID-19 pandemic could have on the collectability of its outstanding receivables. The Company’s customer pools are comprised of North American highway deicing customers, U.K. highway deicing customers, U.K. storage customers, North American consumer and industrial customers, Plant Nutrition North America customers, Plant Nutrition South America customers and customers whose outstanding receivable balances have been sent to collections or put on a payment plan. Customers grouped within these pools have similar risk characteristics. The Company’s allowance for doubtful accounts consists of estimates of expected credit losses and accruals for returns and allowances. At the transition date of January 1, 2020, the implementation of CECL had an immaterial impact of less than $0.1 million on the Company’s consolidated financial statements. Under CECL, the Company had an allowance for doubtful accounts of $9.4 million and $11.1 million as of January 1, 2020, and December 31, 2020, respectively.

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REVENUES

12 Months Ended

Dec. 31, 2020

Revenue from Contract with Customer [Abstract]

REVENUES

REVENUES

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 magnesium chloride for agricultural purposes 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 has made an accounting policy election to recognize any 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. As a practical expedient, 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.

Practical Expedients and Accounting Policy Elections

Upon adoption of the guidance, the Company elected (i) to exclude disclosures of transaction prices allocated to remaining performance obligations when the Company recognized such revenue for all periods prior to the date of initial application of the new guidance, (ii) not to adjust the amount of consideration for the effects of a significant financing component when the Company expects, at contract inception, that the period between the Company's transfer of a product or service to a customer and when the customer pays for that product or service will be one year or less, (iii) to expense costs to obtain a contract as incurred for costs when the Company expects that the amortization period would have been one year or less, (iv) not to recast revenue for customer contracts that begin and end in the same fiscal period, and (v) not to assess whether promised goods or services are performance obligations if they are immaterial in the context of the customer contract.

See Note 15 for disaggregation of sales by segment, type and geographical region.

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LEASES

12 Months Ended

Dec. 31, 2020

Leases [Abstract]

LEASES

LEASES

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 lives 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 non-lease 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	December 31, 2020		December 31, 2019
Assets
Operating lease assets	Other assets	$	55.6	$	53.7
Finance lease assets	Property, plant and equipment, net	7.2		5.8
Total lease assets		$	62.8	$	59.5
Liabilities
Current liabilities:
Operating	Accrued expenses and other current liabilities	$	14.8	$	12.8
Finance	Accrued expenses and other current liabilities	1.3		1.1
Noncurrent liabilities:
Operating	Other noncurrent liabilities	42.8		41.0
Finance	Other noncurrent liabilities	7.0		6.2
Total lease liabilities		$	65.9	$	61.1

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

	Year Ended December 31, 2020		Year Ended December 31, 2019
Finance lease cost:
Amortization of lease assets	$	1.8	$	1.1
Interest on lease liabilities	0.6		0.6
Operating lease cost	17.4		19.2
Variable lease cost(a)	11.7		18.8
Total lease cost	$	31.5	$	39.7

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

Maturities of lease liabilities are as follows (in millions):

	Operating Leases		Finance Leases		Total
2021	$	16.4	$	1.8	$	18.2
2022	13.1		1.2		14.3
2023	8.4		1.1		9.5
2024	5.7		0.9		6.6
2025	4.9		0.9		5.8
After 2025	18.0		6.1		24.1
Total lease payments	66.5		12.0		78.5
Less: Interest	(8.9)		(3.7)		(12.6)
Present value of lease liabilities	$	57.6	$	8.3	$	65.9

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

	December 31, 2020		December 31, 2019
Weighted-average remaining lease term (years)
Operating leases	7.0		7.7
Finance leases	9.3		7.2
Weighted-average discount rate
Operating leases	3.7	%	4.3	%
Finance leases	7.3	%	7.6	%

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

	Year Ended December 31, 2020		Year Ended December 31, 2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$	15.3	$	18.9
Operating cash flows from finance leases	0.6		0.6
Financing cash flows from finance leases	1.8		1.3
Leased assets obtained in exchange for new operating lease liabilities	16.5		20.3
Leased assets obtained in exchange for new finance lease liabilities	3.8		0.2

LEASES

LEASES

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 lives 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 non-lease 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	December 31, 2020		December 31, 2019
Assets
Operating lease assets	Other assets	$	55.6	$	53.7
Finance lease assets	Property, plant and equipment, net	7.2		5.8
Total lease assets		$	62.8	$	59.5
Liabilities
Current liabilities:
Operating	Accrued expenses and other current liabilities	$	14.8	$	12.8
Finance	Accrued expenses and other current liabilities	1.3		1.1
Noncurrent liabilities:
Operating	Other noncurrent liabilities	42.8		41.0
Finance	Other noncurrent liabilities	7.0		6.2
Total lease liabilities		$	65.9	$	61.1

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

	Year Ended December 31, 2020		Year Ended December 31, 2019
Finance lease cost:
Amortization of lease assets	$	1.8	$	1.1
Interest on lease liabilities	0.6		0.6
Operating lease cost	17.4		19.2
Variable lease cost(a)	11.7		18.8
Total lease cost	$	31.5	$	39.7

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

Maturities of lease liabilities are as follows (in millions):

	Operating Leases		Finance Leases		Total
2021	$	16.4	$	1.8	$	18.2
2022	13.1		1.2		14.3
2023	8.4		1.1		9.5
2024	5.7		0.9		6.6
2025	4.9		0.9		5.8
After 2025	18.0		6.1		24.1
Total lease payments	66.5		12.0		78.5
Less: Interest	(8.9)		(3.7)		(12.6)
Present value of lease liabilities	$	57.6	$	8.3	$	65.9

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

	December 31, 2020		December 31, 2019
Weighted-average remaining lease term (years)
Operating leases	7.0		7.7
Finance leases	9.3		7.2
Weighted-average discount rate
Operating leases	3.7	%	4.3	%
Finance leases	7.3	%	7.6	%

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

	Year Ended December 31, 2020		Year Ended December 31, 2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$	15.3	$	18.9
Operating cash flows from finance leases	0.6		0.6
Financing cash flows from finance leases	1.8		1.3
Leased assets obtained in exchange for new operating lease liabilities	16.5		20.3
Leased assets obtained in exchange for new finance lease liabilities	3.8		0.2

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INVENTORIES

12 Months Ended

Dec. 31, 2020

Inventory Disclosure [Abstract]

INVENTORIES

INVENTORIES

Inventories consist of the following at December 31 (in millions):

	2020		2019
Finished goods	$	287.4	$	235.3
Raw materials and supplies	83.2		76.2
Total inventories	$	370.6	$	311.5

Based on the nature of the Company’s inventories, and specifically related to bulk SOP stockpiles, certain estimates are required to measure the amount of inventories at any point in time. During the third quarter of 2020, the Company identified an error in the valuation of its bulk SOP stockpile inventory at its Ogden facility when one of its stockpiles was largely depleted, which resulted in an estimated overstatement of inventories of approximately $7.4 million. The Company evaluated the error and believes it is not material to any previous period and has therefore recorded this additional expense to product cost within its Plant Nutrition North America segment during 2020.

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PROPERTY, PLANT AND EQUIPMENT

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

PROPERTY, PLANT AND EQUIPMENT

PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment consists of the following at December 31 (in millions):

	2020		2019
Land, buildings and structures and leasehold improvements	$	626.8	$	596.0
Machinery and equipment	1,085.1		1,001.9
Office furniture and equipment	53.3		60.7
Mineral interests	172.4		171.1
Construction in progress	58.7		141.3
	1,996.3		1,971.0
Less accumulated depreciation and depletion	(1,031.4)		(940.2)
Property, plant and equipment, net	$	964.9	$	1,030.8

The cost of leased property, plant and equipment under finance leases included above was $11.2 million and $9.2 million with accumulated depreciation of $4.0 million and $3.4 million as of December 31, 2020 and 2019, respectively.

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GOODWILL AND OTHER INTANGIBLE ASSETS

12 Months Ended

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

GOODWILL AND OTHER INTANGIBLE ASSETS

GOODWILL AND OTHER INTANGIBLE ASSETS

The asset value and accumulated amortization as of December 31, 2020 and 2019 for the finite-lived intangibles assets are as follows (in millions):

	Supply Agreement		SOP Production Rights		Customer/Distributor Relationships		Lease Rights		Trade Names		Developed Technologies		Patents		Other		Total
December 31, 2020
Gross intangible asset	$	28.5	$	24.3	$	11.6	$	1.8	$	30.3	$	26.2	$	16.2	$	1.3	$	140.2
Accumulated amortization	(5.7)		(16.6)		(6.8)		(0.6)		(11.8)		(21.4)		(9.6)		(1.0)		(73.5)
Net intangible assets	$	22.8	$	7.7	$	4.8	$	1.2	$	18.5	$	4.8	$	6.6	$	0.3	$	66.7

	Supply Agreement		SOP Production Rights		Customer/Distributor Relationships		Lease Rights		Trade Names		Developed Technologies		Patents		Other		Total
December 31, 2019
Gross intangible asset	$	27.9	$	24.3	$	12.7	$	1.7	$	36.8	$	32.8	$	16.0	$	1.3	$	153.5
Accumulated amortization	(5.0)		(15.6)		(6.1)		(0.5)		(10.9)		(21.7)		(8.1)		(0.9)		(68.8)
Net intangible assets	$	22.9	$	8.7	$	6.6	$	1.2	$	25.9	$	11.1	$	7.9	$	0.4	$	84.7

The estimated lives of the Company’s finite-lived intangible assets are as follows:

Intangible asset	Estimated Lives
Supply agreement	50 years
SOP production rights	25 years
Patents	10-20 years
Developed technology	4-7 years
Lease rights	25 years
Customer and distributor relationships	10-14 years
Trademarks	10 years
Trade names	10-11 years

None of the finite-lived intangible assets have a residual value. Aggregate amortization expense was $10.7 million in 2020, $13.6 million in 2019 and $15.0 million in 2018 and is projected to be between $5 million and $10 million per year over the next five years. The weighted average life for the Company’s finite-lived intangibles is 20 years.

In addition, the Company had water rights of $17.7 million as of December 31, 2020 and 2019, and trade names of $0.6 million as of December 31, 2020 and 2019, which have indefinite lives.

The Company has goodwill of $281.3 million and $343.0 million as of December 31, 2020 and 2019, respectively, in its Consolidated Balance Sheets. The Company has recorded goodwill of $56.4 million and $55.4 million as of December 31, 2020 and 2019, respectively, in its Plant Nutrition North America segment. Additionally, the Company has recorded goodwill of $218.8 million and $281.6 million as of December 31, 2020 and 2019, respectively, in its Plant Nutrition South America segment. The remaining amounts in both periods were immaterial and recorded in its corporate and other and Salt segment. The decrease in the balance of goodwill from December 31, 2019, was due to changes in foreign currency exchange rates.

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INCOME TAXES

12 Months Ended

Dec. 31, 2020

Income Tax Disclosure [Abstract]

INCOME TAXES

INCOME TAXES

The Company files tax returns in the U.S., Canada, Brazil and the U.K. at the federal and local taxing jurisdictional levels. The Company’s U.S. federal tax returns for tax years 2017 forward remain open and subject to examination. Generally, the Company’s state, local and foreign tax returns for years as early as 2002 forward remain open and subject to examination, depending on the jurisdiction.

Tax Cuts and Jobs Act

On December 22, 2017, the U.S. enacted the Act (which is commonly referred to as “U.S. tax reform”). The Act significantly changes U.S. corporate income tax laws by reducing the U.S. corporate income tax rate to 21% beginning in 2018 and creating a quasi-territorial tax system with a one-time mandatory tax on previously deferred foreign earnings. As of December 31, 2018, the Company has completed its accounting for the tax effects of enactment of the Act. In 2017, the Company recorded a reasonable estimated net charge of $46.8 million, consisting of $55.2 million related to the one-time mandatory tax on unremitted foreign earnings, offset by an $8.4 million benefit related to the remeasurement of the Company’s deferred tax liabilities at the new income tax rate. During 2018, the Company finalized the accounting for the enactment of the Act and recorded a tax benefit of $3.0 million, consisting of a $3.1 million tax benefit related to the one-time mandatory tax on unremitted foreign earnings offset by a $0.1 million charge related to the remeasurement of the Company’s deferred tax liabilities. The 2018 tax effects of the Act are included in income tax expense in the Company’s Consolidated Statements of Operations.

Although the unremitted foreign earnings subjected to the one-time mandatory tax on unremitted foreign earnings would not be subject to additional U.S. federal income tax, the Company must still account for the tax consequences of outside basis differences and other tax impacts of its investments in non-U.S. subsidiaries. As such, the Company revised its permanently reinvested assertion and now expects to repatriate approximately $150 million of unremitted foreign earnings on which $4.3 million of income tax expense has been recorded for foreign withholding tax and state income taxes, consisting of $0.9 million recorded in 2019 and $3.4 million recorded in 2018. All remaining unremitted earnings of non-U.S. subsidiaries and outside basis differences are considered permanently reinvested.

The following table summarizes the Company’s income tax provision for the years ended December 31 (in millions):

	2020		2019		2018
Current:
Federal	$	(22.3)	$	5.3	$	8.1
State	0.4		2.0		4.3
Foreign	28.2		26.6		13.1
Total current	6.3		33.9		25.5
Deferred:
Federal	1.2		(7.2)		(8.6)
State	(1.2)		(1.9)		(0.5)
Foreign	5.4		(2.7)		(7.6)
Total deferred	5.4		(11.8)		(16.7)
Total provision for income taxes	$	11.7	$	22.1	$	8.8

The following table summarizes components of earnings before income taxes and shows the tax effects of significant adjustments from the expected income tax expense computed at the federal statutory rate for the years ended December 31 (in millions):

	2020			2019			2018
U.S. (loss) income	$	(4.1)		$	31.7		$	(80.6)
Foreign income	75.3			52.9			158.2
Earnings before income taxes	$	71.2		$	84.6		$	77.6
Computed tax at the U.S. federal statutory rate of 21%	15.0			17.8			16.3
Foreign income rate differential, mining, and withholding taxes, net of U.S. federal deduction	9.3			10.2			0.9
Percentage depletion in excess of basis	(4.4)			(5.8)			(4.7)
Other domestic tax reserves, net of reversals	(9.7)			0.2			1.5
State income taxes, net of federal income tax benefit	(0.9)			—			2.1
Change in valuation allowance on deferred tax asset	2.4			0.2			(5.7)
Interest expense recognition differences	(3.5)			(3.5)			(3.6)
GILTI	3.8			1.0			1.0
Tax Cuts and Jobs Act of 2017	—			1.6			(3.0)
Tax on repatriated amounts	—			0.9			3.4
Transfer pricing settlement with taxing authorities	—			—			2.2
Other, net	(0.3)			(0.5)			(1.6)
Provision for income taxes	$	11.7		$	22.1		$	8.8
Effective tax rate	16		%	26		%	11		%

Under U.S. GAAP, deferred tax assets and liabilities are recognized for the estimated future tax effects, based on enacted tax law, of temporary differences between the values of assets and liabilities recorded for financial reporting and tax purposes, and of net operating losses and other carryforwards. The significant components of the Company’s deferred tax assets and liabilities were as follows at December 31 (in millions):

	2020		2019
Deferred tax assets:
Reluz Nordeste Indústria e Comércio Ltda net operating loss carryforwards	$	0.4	$	0.6
Compass Minerals South America net operating loss carryforwards	—		3.3
Excess interest expense	9.9		14.9
Foreign tax credit	39.4		38.1
Right of use lease liability	11.3		11.1
Stock-based compensation	2.0		2.3
Other, net	20.5		16.5
Total deferred tax assets before valuation allowance	83.5		86.8
Valuation allowance	(42.0)		(39.8)
Total deferred tax assets	41.5		47.0
Deferred tax liabilities to be netted with deferred tax assets:
Property, plant and equipment	17.2		21.2
Right of use lease asset	11.3		11.1
Other, net	1.4		1.0
Total deferred tax liabilities to be netted with deferred tax assets	29.9		33.3
Net noncurrent deferred tax assets	$	11.6	$	13.7
Deferred tax assets to be netted with deferred tax liabilities:
Net operating loss carryforwards	$	1.7	$	2.2
Right of use lease liability	1.9		0.9
Other, net	0.9		2.1
Total deferred tax assets before valuation allowance	4.5		5.2
Valuation allowance	(1.4)		(1.4)
Total deferred tax assets to be netted with deferred tax liabilities	3.1		3.8
Deferred tax liabilities:
Property, plant and equipment	66.5		63.7
Intangible asset	22.2		29.1
Right of use lease asset	1.9		0.9
Total deferred tax liabilities	90.6		93.7
Net deferred tax liabilities	$	87.5	$	89.9

At December 31, 2020 and 2019, the Company had $7.7 million and $18.8 million, respectively, of gross foreign federal net operating loss (“NOL”) carryforwards that have no expiration date, $0.1 million and $1.7 million, respectively, of gross foreign federal NOL carryforwards which expire in 2033 and $0.2 million and $0.3 million, respectively, of net operating tax-effected state NOL carryforwards which will expire beginning in 2027.

The Company has recorded a valuation allowance for a portion of its deferred tax asset relating to various tax attributes that it does not believe are, more likely than not to be realized. During 2018, the Company determined it is more likely than not that all of its Brazilian deferred tax assets acquired in connection with the acquisition of Compass Minerals South America will be used to reduce taxable income. As a result, the Company released the remaining $7.2 million of valuation allowances during the year ending December 31, 2018. As of December 31, 2020 and 2019, the Company’s valuation allowance was $43.4 million and $41.2 million, respectively. In the future, if the Company determines, based on existence of sufficient evidence, that it should realize more or less of its deferred tax assets, an adjustment to the valuation allowance will be made in the period such a determination is made.

The calculation of the Company’s tax liabilities involves dealing with uncertainties in the application of complex tax regulations in multiple jurisdictions. The Company recognizes potential liabilities for unrecognized tax benefits in the U.S. and other tax jurisdictions in accordance with applicable U.S. GAAP, which requires uncertain tax positions to be recognized only if they are more likely than not to be upheld based on their technical merits. The measurement of the uncertain tax position is based on the largest benefit amount that is more likely than not (determined on a cumulative probability basis) to be realized upon settlement of the matter. If payment of these amounts ultimately proves to be unnecessary, the reversal of the liabilities would result in tax benefits being recognized in the period when the Company determines the liabilities are no longer necessary. If the Company’s estimate of tax liabilities proves to be less than the ultimate assessment, a further charge to expense may result.

The Company’s uncertain tax positions primarily relate to transactions and deductions involving U.S., Canadian and Brazilian operations. If favorably resolved, $28.8 million of unrecognized tax benefits would decrease the Company’s effective tax rate. Management believes that it is reasonably possible that unrecognized tax benefits will decrease by approximately $1.1 million in the next twelve months largely as a result of tax returns being closed to future audits. In 2020, the Company’s income tax expense included a benefit of approximately $11.0 million related to the release of uncertain tax positions due to the expiration of statutes of limitations.

The following table shows a reconciliation of the beginning and ending amount of unrecognized tax benefits (in millions):

	2020		2019		2018
Unrecognized tax benefits:
Balance at January 1	$	47.4	$	50.9	$	67.4
Additions resulting from current year tax positions	—		0.2		8.0
Additions relating to tax positions taken in prior years	1.4		4.5		2.6
Reductions due to settlements	—		—		(25.0)
Reductions due to cash payments	—		(7.5)		—
Reductions relating to tax positions taken in prior years	(0.1)		(0.4)		(0.3)
Reductions due to expiration of tax years	(10.4)		(0.3)		(1.8)
Balance at December 31	$	38.3	$	47.4	$	50.9

The Company accrues interest and penalties related to its uncertain tax positions within its tax provision. During the years ended December 31, 2020, 2019 and 2018, the Company accrued interest and penalties, net of reversals, of $2.0 million, $4.6 million and $(2.1) million, respectively. As of December 31, 2020 and 2019, accrued interest and penalties included in the Consolidated Balance Sheets totaled $22.3 million and $20.3 million, respectively.

The Company has historically considered the undistributed earnings of its foreign subsidiaries to be permanently reinvested. In December 2017, however, U.S. tax reform legislation was enacted, which included a one-time mandatory tax on previously deferred foreign earnings. As such, in 2018, the Company revised its permanently reinvested assertion and now expects to repatriate approximately $150 million of unremitted foreign earnings on which $4.3 million of income tax expense has been recorded for foreign withholding tax and state income taxes, consisting of $0.9 million recorded in 2019 and $3.4 million recorded in 2018. The Company intends to continue its permanently reinvested assertion on the remaining undistributed earnings of its foreign subsidiaries indefinitely. As of December 31, 2020, the Company has approximately $213.6 million of outside basis differences on which no deferred taxes have been recorded as the determination of the unrecognized deferred taxes is not practicable.

Canadian provincial tax authorities have challenged tax positions claimed by one of the Company’s Canadian subsidiaries and have issued tax reassessments for years 2002-2015. The reassessments are a result of ongoing audits and total approximately $153.4 million, including interest, through December 31, 2020. The Company disputes these reassessments and plans to 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 $120.1 million performance bond and has paid $39.0 million (most of which is recorded in other assets in the Consolidated Balance Sheets at December 31, 2020), which is necessary to proceed with future appeals or litigation.

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 December 31, 2020, 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.

Settlements

In 2017, the Company, the CRA and the IRS reached a settlement agreement on transfer pricing for its 2007-2012 tax years. As a result of this settlement, the Company recognized $13.8 million of income tax expense in the Consolidated Statement of Operations related to the Company’s Canadian tax positions for the years 2007-2016. The recording of this settlement resulted in increased sales for the Company’s Canadian subsidiary of $85.7 million and increased offsetting expenses for its U.S. subsidiary in 2017 causing a domestic loss and significant foreign income. During 2018, in accordance with the agreement, the Company’s U.S. subsidiary made intercompany cash payments of $85.7 million to its Canadian subsidiary and tax payments were made to Canadian taxing authorities of $17.5 million. Additional tax payments of $5.3 million were made during 2019 with the remaining liability of $1.4 million expected to be paid in 2021. Corresponding tax refunds of $22.2 million have been received as of December 31, 2020, from U.S. taxing authorities with the remaining refund of approximately $0.9 million expected in 2021 (recorded in other current assets in the Consolidated Balance Sheets). Additionally, the reassessed Canadian tax, penalties and interest for the Company for years 2007 and 2008 of approximately $34.2 million are effectively resolved.

In 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 income tax expense was previously recognized in 2017, however the recording of this settlement resulted in increased sales for the Company’s Canadian subsidiary of $106.1 million and offsetting expenses for its U.S. subsidiary in 2018 causing a domestic loss and significant foreign income. During 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 were made to Canadian taxing authorities of $29.9 million, with the remaining $1.4 million balance paid during 2020. Corresponding tax refunds of $59.7 million have been received as of December 31, 2020, from U.S. taxing authorities, with the remaining $1.9 million expected in 2021 (recorded in other current assets in the Consolidated Balance Sheets).

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PENSION PLANS AND OTHER BENEFITS

12 Months Ended

Dec. 31, 2020

Retirement Benefits [Abstract]

PENSION PLANS AND OTHER BENEFITS

PENSION PLANS AND OTHER BENEFITS

The Company has a defined benefit pension plan for certain of its U.K. employees. Benefits of this pension plan are based on a combination of years of service and compensation levels. This plan was closed to new participants in 1992. Beginning December 1, 2008, future benefits ceased to accrue for the remaining active employee participants in the pension plan concurrent with the establishment of a defined contribution plan for these employees. In addition, the Company has a defined benefit plan with certain Compass Minerals South America employees. The pension assets, obligations and net pension expense related to this plan are immaterial.

The Company’s U.K. pension plan investment strategy is to maximize return on investments while minimizing risk. This is accomplished by investing in high-grade equity and debt securities. The Company’s portfolio guidelines recommend that equity securities comprise approximately 75% of the total portfolio and that approximately 25% be invested in debt securities. The Company’s portfolio has shifted to a smaller proportion of equity funds due to the increased volatility of these funds over the last several years, and it is researching strategies that will reduce volatility, while also maximizing returns. Investment strategies and portfolio allocations are based on the U.K. pension plan’s benefit obligations and its funded or underfunded status, expected returns, and the Company’s portfolio guidelines and are monitored on a regular basis. The weighted-average asset allocations by asset category are as follows:

	Plan Assets at December 31,
Asset Category	2020		2019
Cash and cash equivalents	2	%	3	%
Blended funds	48	%	51	%
Bond funds	50	%	46	%
Total	100	%	100	%

The fair value of the Company’s U.K. pension plan assets at December 31, 2020 and 2019, by asset category (see Note 14 for a discussion regarding fair value measurements) are as follows (in millions):

	December 31, 2020		Level One		Level Two		Level Three
Asset category:
Cash and cash equivalents(a)	$	1.3	$	1.3	$	—	$	—
Blended funds(b)	34.9		—		34.9		—
Bond funds(c):
Treasuries	35.9		—		35.9		—
Total Pension Assets	$	72.1	$	1.3	$	70.8	$	—

	December 31, 2019		Level One		Level Two		Level Three
Asset category:
Cash and cash equivalents(a)	$	1.9	$	1.9	$	—	$	—
Blended funds(b)	33.6		—		33.6		—
Bond funds(c):
Treasuries	30.1		—		30.1		—
Total Pension Assets	$	65.6	$	1.9	$	63.7	$	—

(a)The fair value of cash and cash equivalents is its carrying value.

(b)The Company is invested in a diversified growth fund. The diversified growth fund is valued at the last traded or official close for the underlying equities and bid or mid for the underlying fixed income securities depending on the portfolio benchmark. Where representative prices are unavailable, underlying fixed income investments are valued based on other observable market-based inputs.

(c)This category includes investments in investment-grade fixed-income instruments and funds linked to U.K. treasury notes. The funds are valued using the bid amounts for each fund. All of the Company’s bond fund pension assets are invested in U.K.-linked treasuries as of December 31, 2020 and 2019.

As of December 31, 2020 and 2019, amounts recognized in accumulated other comprehensive loss, net of tax, consisted of actuarial net losses of $9.4 million (including $10.4 million of accumulated loss less prior service cost of $1.0 million) and $6.8 million (including $7.9 million of accumulated loss less prior service cost of $1.1 million), respectively. During 2020, the amounts recognized in accumulated other comprehensive loss, net of tax, consisted of actuarial net losses of $(2.9) million, amortization of loss of $0.8 million, amortization of prior service cost of $(0.1) million and foreign exchange of $(0.3) million.

During 2019, the amounts recognized in accumulated other comprehensive loss, net of tax, consisted of actuarial net losses of $(2.4) million, amortization of loss of $0.4 million, amortization of prior service cost of $(0.1) million and foreign exchange of $(0.3) million. 

During 2018, the amounts recognized in accumulated other comprehensive loss, net of tax, consisted of actuarial net losses of $(1.2) million, amortization of loss of $0.3 million, amortization of prior service cost of $(0.1) million and foreign exchange of $0.4 million. The Company expects to recognize approximately $1.4 million ($1.5 million of amortization of loss less $0.1 million of prior service cost) of losses from accumulated other comprehensive loss as a component of net periodic pension cost in 2021. Total net periodic pension cost in 2021 is expected to be $0.1 million.

The assumptions used in determining pension information for the U.K. pension plan for the years ended December 31 were as follows:

	2020		2019		2018
Discount rate	1.20	%	2.00	%	2.90	%
Expected return on plan assets	3.10	%	3.10	%	3.70	%

The overall expected long-term rate of return on plan assets is a weighted-average expectation based on the fair value of targeted and expected portfolio composition. The Company considers historical performance and current benchmarks to arrive at expected long-term rates of return in each asset category. The Company determines its discount rate based on a forward yield curve for a portfolio of high-credit-quality bonds with expected cash flows and an average duration closely matching the expected benefit payments under the plan.

The Company’s funding policy is to make the minimum annual contributions required by applicable regulations or agreements with the plan administrator. Management expects there will be no contributions during 2021. In addition, the Company may periodically make contributions to the plan based upon the underfunded status of the plan or other transactions, which warrant incremental contributions in the judgment of management.

The U.K. pension plan includes a provision whereby supplemental benefits may be available to participants under certain circumstances after case review and approval by the plan trustees. Because instances of this type of benefit have historically been infrequent, the development of the projected benefit obligation and net periodic pension cost (benefit) has not provided for any future supplemental benefits. If additional benefits are approved by the trustees, it is likely that an additional contribution would be required and the amount of incremental benefits would be expensed by the Company.

The Company expects to pay the following benefit payments (in millions):

Calendar Year	Future Expected Benefit Payments
2021	$	3.2
2022	3.2
2023	3.3
2024	3.4
2025	3.4
2026-2030	18.4

The following table sets forth pension obligations and plan assets for the Company’s U.K. pension plan, as of December 31 (in millions):

	2020		2019
Change in benefit obligation:
Benefit obligation as of January 1	$	64.1	$	58.6
Interest cost	1.2		1.7
Actuarial loss	8.3		4.8
Plan amendment	0.1		—
Benefits paid	(2.9)		(3.5)
Currency fluctuation adjustment	2.5		2.5
Benefit obligation as of December 31	73.3		64.1
Change in plan assets:
Fair value as of January 1	65.6		60.7
Actual return	6.7		4.2
Company contributions	0.4		1.7
Currency fluctuation adjustment	2.3		2.5
Benefits paid	(2.9)		(3.5)
Fair value of plan assets as of December 31	72.1		65.6
(Underfunded) Overfunded status of the plan	$	(1.2)	$	1.5

The Company’s U.K. pension plan was underfunded as of December 31, 2020, and overfunded as of December 31, 2019, and accordingly, $1.2 million and $1.5 million has been recorded as a noncurrent liability and a noncurrent asset, respectively, in the Company’s Consolidated Balance Sheets. The accumulated benefit obligation for the U.K. pension plan was $73.3 million and $64.1 million as of December 31, 2020 and 2019, respectively. The plan assets were less than the accumulated benefit obligation as of December 31, 2020, but were in excess of the accumulated benefit obligation as of December 31, 2019. The vested benefit obligation is the actuarial present value of the vested benefits to which the employee is currently entitled but based on the employee’s expected date of retirement. Since all employees are vested, the accumulated benefit obligation and the vested benefit obligation are the same amount.

The Company uses a straight-line methodology of amortization subject to a corridor based upon the higher of the fair value of assets and the pension benefit obligation over a five-year period. The components of net periodic pension cost (benefit) were as follows for the years ended December 31 (in millions):

	2020		2019		2018
Interest cost on projected benefit obligation	$	1.2	$	1.7	$	1.6
Prior service cost	(0.1)		(0.1)		(0.1)
Expected return on plan assets	(1.9)		(2.2)		(2.5)
Plan amendment	0.1		—		—
Net amortization	1.0		0.5		0.3
Net periodic pension cost (benefit)	$	0.3	$	(0.1)	$	(0.7)

The Company has defined contribution and pre-tax savings plans (the “Savings Plans”) for certain of its employees. Under each of the Savings Plans, participants are permitted to defer a portion of their compensation. Company matching contributions to the Savings Plans are based on a percentage of employee contributions. Additionally, certain of the Savings Plans have a profit-sharing feature for salaried and non-union hourly employees. The Company contribution to the profit-sharing feature is discretionary and based on the Company’s financial performance and other factors. Expense attributable to the Savings Plans was $12.5 million, $11.6 million and $12.6 million for the years ended December 31, 2020, 2019 and 2018, respectively.

The Savings Plans include a non-qualified plan for certain executive officers and other key employees who are limited in their ability to participate in qualified plans due to existing regulations. These employees are allowed to defer a portion of their compensation, upon which they will be entitled to receive Company contributions despite the limitations imposed by current U.S. regulations for qualified plans. The Company’s contributions to the Savings Plans include Company matching contributions based on a percentage of the employee’s deferred salary, discretionary profit sharing contributions and any investment income (loss) that would have been credited to their account had the contributions been made according to employee-designated investment specifications. Although not required to do so, the Company invests amounts equal to the salary deferrals, the corresponding Company matching contribution and discretionary profit sharing amounts according to the employee-designated investment specifications. As of December 31, 2020 and 2019, investments in marketable securities totaling $1.9 million and $1.4 million, respectively, were included in other noncurrent assets with a corresponding deferred compensation liability included in other noncurrent liabilities in the Consolidated Balance Sheets. Compensation expense recorded for the non-qualified plan was immaterial for each of the years ended December 31, 2020, 2019 and 2018, including amounts attributable to investment income, and was included in other, net in the Consolidated Statements of Operations.

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LONG TERM DEBT

12 Months Ended

Dec. 31, 2020

Debt Disclosure [Abstract]

LONG TERM DEBT

LONG TERM DEBT

Long-term debt consists of the following at December 31 (in millions):

	2020		2019
4.875% Senior Notes due July 2024	$	250.0	$	250.0
Term Loan due January 2025	390.0		400.0
Revolving Credit Facility due January 2025	130.3		160.0
6.75% Senior Notes due December 2027	500.0		500.0
AR Securitization Facility expires June 2023	51.2		—
3.7% Banco Itaú loan due March 2020	—		15.4
Banco Santander loan due October 2020	—		16.2
Banco Itaú loan due February 2021	10.4		—
Banco Rabobank loan due July 2021	6.8		17.4
Banco BTG loan due July 2021	2.6		—
Banco Santander loan due September 2021	—		19.9
Banco do Brasil loan due September 2021	9.6		12.4
Banco Rabobank loan due September 2021	6.8		—
Banco BTG loan due October 2021	2.6		—
Banco Rabobank loan due November 2021	13.5		17.4
Banco Santander loan due December 2021	—		14.9
Banco BTG loan due January 2022	1.0		—
Banco Votorantim loan due February 2022	7.7		—
Banco Bradesco loan due February 2022	4.8		—
Banco Santander loan due March 2022	2.9		—
Banco BTG loan due April 2022	1.0		—
Banco BTG loan due July 2022	2.6		—
Banco Safra loan due October 2022	3.9		—
Banco Santander loan due October 2022	12.5		—
Financiadora de Estudos e Projetos loan due November 2023	4.1		7.2
	1,414.3		1,430.8
Less unamortized debt issuance costs	(12.9)		(14.8)
Total debt	1,401.4		1,416.0
Less current portion	(63.7)		(52.1)
Long-term debt	$	1,337.7	$	1,363.9

Credit Agreement

In November 2019, the Company entered into an agreement to amend and restate its credit agreement (the “2019 Credit Agreement”), which matures in January 2025. The 2019 Credit Agreement provides for senior secured financing consisting of a $400 million term loan facility and a $300 million revolving credit facility. The term loan is repayable in quarterly installments of interest and principal which began in March 2020 with principal payments equal to 2.5% per year during the first 2 years and 5% per year during the final 3 years. The Company may elect for the credit facility to bear interest at either an alternate base rate or an adjusted eurocurrency bank deposit rate plus, in each case, an interest rate margin, based upon a defined consolidated leverage ratio. The outstanding term loan can be prepaid at any time without penalty. Prior to the 2019 Credit Agreement, the Company’s credit agreement consisted of two senior secured term loans and a senior secured revolving credit facility which matured in July 2021. Interest on the Company’s borrowings under the previous outstanding credit agreement was variable based on either the LIBOR or a base rate (defined as the greater of a specified U.S. or Canadian prime lending rate or the federal funds effective rate, increased by 0.5%) plus a margin which was dependent upon the Company’s leverage ratio and the type of term loan borrowing. As of December 31, 2020, the weighted average interest rate was 2.2% on all borrowings outstanding under the 2019 Credit Agreement. Both credit agreements require the Company to maintain certain financial ratios, including a minimum interest coverage ratio and a maximum total leverage ratio.

Under the current revolving credit facility, up to $40 million may be drawn in Canadian dollars and $10 million may be drawn in British pounds sterling. Additionally, the revolving credit facility includes a sub-limit for short-term letters of credit in an amount not to exceed $50 million. As of December 31, 2020, there was $130.3 million outstanding under the revolving credit facility, and, after deducting outstanding letters of credit totaling $12.5 million, the Company’s borrowing availability was $157.2 million. The Company incurs participation fees related to its outstanding letters of credit and commitment fees on its available borrowing capacity. The rates vary depending on the Company’s leverage ratio. Bank fees are not material.

In connection with the 2019 Credit Agreement, the Company paid $4.1 million of fees ($3.8 million was capitalized as deferred financing costs with $0.3 million recorded as an expense). The Company also wrote-off $0.3 million of previously capitalized deferred financing costs as part of this refinancing in 2019.

In December 2018, the Company entered into an amendment to its credit agreement, which eased restrictions in certain covenants contained in the agreement. In connection with this amendment, the Company paid fees totaling $1.4 million ($1.4 million was capitalized as deferred financing costs with less than $0.1 million recorded as an expense).

The Company’s 2019 Credit Agreement borrowings are secured by substantially all existing and future U.S. assets of the Company, the Goderich mine in Ontario, Canada, and capital stock of certain subsidiaries. As of December 31, 2020, the Company was in compliance with each of its covenants under the 2019 Credit Agreement.

Senior Notes

In November 2019, the Company also issued $500 million 6.75% Senior Notes due December 2027 (the “6.75% Notes”), which are subordinate to the 2019 Credit Agreement borrowings. The 6.75% Notes are unsecured obligations and are guaranteed by certain of the Company’s domestic subsidiaries. Interest on the 6.75% Notes is due semi-annually in June and December beginning in 2020. The 6.75% Notes are subordinated to all existing and future indebtedness. In connection with the 6.75% Notes, the Company paid $8.2 million of fees, all of which were capitalized as deferred financing costs.

The 4.875% Senior Notes due July 2024 (the “4.875% Notes”) are subordinate to the 2019 Credit Agreement borrowings. Interest on the 4.875% Notes is due annually in January and July. The 2019 Credit Agreement and the agreements governing the 4.875% Notes and the 6.75% Notes and other indebtedness contain covenants that limit the Company’s ability, among other things, to incur additional indebtedness or contingent obligations or grant liens; pay dividends or make distributions to stockholders; repurchase or redeem the Company’s stock; make investments or dispose of assets; prepay, or amend the terms of certain junior indebtedness; engage in sale and leaseback transactions; make changes to the Company’s organizational documents or fiscal periods; grant liens on the Company’s assets or make certain intercompany dividends, investments or asset transfers; enter into new lines of business; enter into transactions with the Company’s stockholders and affiliates; and acquire the assets of or merge or consolidate with other companies.

Other Debt

As of December 31, 2020, the Company had $92.8 million of loans related to Compass Minerals South America, which have maturity dates ranging from February 2021 through November 2023 and bear interest at rates of either a percentage of CDI, an overnight inter-bank lending rate in Brazil, or LIBOR plus a margin. A portion of the loans are denominated in U.S. dollars and a portion of the loans are denominated in Brazilian real, Compass Minerals South America’s functional currency. The Company has entered into foreign currency swap agreements in relation to some of these loans whereby the Company agreed to swap interest and principal payments on loans denominated in U.S. dollars for principal and interest payments denominated in Brazilian real (see Note 11 for further discussion).

In the first quarter of 2020, the Company entered into three loans totaling $20.0 million which mature between February 2021 and March 2022, respectively. Two of the loans were denominated in Brazilian real and one loan was denominated in euros. In connection with the loan denominated in euros, the Company entered into a swap to exchange principal and interest payments denominated in euros to Brazilian real (see Note 11). These loans bear interest ranging from 143% - 150% of CDI.

During the third quarter of 2020, the Company entered into six new loans totaling $15.1 million which mature between July 2021 and July 2022. These loans are denominated in Brazilian real and bear interest rates ranging from 200% - 204% of CDI. The liquidity created from these loans allowed the Company to prepay $15.4 million worth of existing loans with maturity date of September 2021.

During the fourth quarter of 2020, the Company entered into three new loans totaling $21.2 million which mature between February 2022 and October 2022. These loans are denominated in Brazilian real and bear interest rates ranging from 171% - 186% of CDI. The proceeds of the new loans were used to pay a loan that matured in October 2020 and a loan scheduled to mature in December 2021.

In the first quarter of 2019, the Company entered into two Brazilian real-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 real-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 fourth quarter of 2019, the Company entered into two Brazilian real-denominated loans totaling $27.3 million which mature in September and December 2021. These loans bear interest at 126% and 129% of CDI, respectively. The Company also refinanced a loan with

Rabobank that expired during the fourth quarter of 2019 in the amount of $17.4 million with a new loan with the same principal that bears interest at 122% of CDI and matures in November 2021.

Securitization

On June 30, 2020, certain of the Company’s U.S. subsidiaries entered into a three-year committed revolving accounts receivable financing facility (the “AR Facility”) of up to $100.0 million with PNC Bank, National Association (“PNC”), as administrative agent and lender, and PNC Capital Markets, LLC, as structuring agent.

In connection with the AR Facility, two of the Company’s U.S. subsidiaries, from time to time, sell and contribute receivables and certain related assets to a special purposes entity and wholly-owned U.S. subsidiary of the Company (the “SPE”). The SPE finances its acquisition of the receivables by obtaining secured loans from PNC and the other lenders party to a receivables financing agreement. A U.S. subsidiary of the Company services the receivables on behalf of the SPE for a fee. In addition, the Company has agreed to guarantee the performance by its subsidiaries. The Company and its subsidiaries do not guarantee the loan principal or interest under the receivables financing agreement or the collectability of the receivables under the AR Facility. As of December 31, 2020, the Company received proceeds from the AR Facility in the amount of $51.2 million.

The purchase price for the sale of receivables consists of cash available to the SPE from loans under the AR Facility and from collections on previously sold receivables and, to the extent the SPE does not have funds available to pay the purchase price due on any day in cash, through an increase in the principal amount of a subordinated intercompany loan. The SPE pays monthly interest and fees with respect to amounts advanced by the lenders under the AR Facility.

The SPE’s sole business consists of the purchase or acceptance through capital contributions of the receivables and the subsequent granting of a security interest in these receivables and related rights to PNC on behalf of the lenders under the AR Facility. The SPE is a separate legal entity with its own separate creditors who will be entitled, upon its liquidation, to be satisfied out of the SPE’s assets prior to any assets or value in the SPE becoming available to the Company and the assets of the SPE are not available to pay creditors of the Company or any of its affiliates other than the SPE.

Future maturities of long-term debt for the years ending December 31, are as follows (in millions):

	Debt Maturity
2021	$	63.7
2022	57.8
2023	72.5
2024	270.0
2025	450.3
Thereafter	500.0
Total	$	1,414.3

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DERIVATIVE FINANCIAL INSTRUMENTS

12 Months Ended

Dec. 31, 2020

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. From time to time, the Company may enter into immaterial foreign exchange contracts to mitigate foreign exchange risk on its sales and accounts receivable. 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 effective portion of 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 a change in natural gas prices impacts 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 December 31, 2020, the Company had entered into natural gas derivative instruments to hedge a portion of its natural gas purchase requirements through December 2022. As of December 31, 2020 and 2019, the Company had agreements in place to hedge forecasted natural gas purchases of 2.5 million and 2.8 million MMBtus, respectively. All natural gas derivative instruments held by the Company as of December 31, 2020 and 2019, qualified and were designated as cash flow hedges. As of December 31, 2020, the Company expects to reclassify from accumulated other comprehensive loss to earnings during the next twelve months $0.3 million of net gains on derivative instruments related to its natural gas hedges.

 Foreign Currency Swaps not Designated as Hedges

In March 2020, the Company entered into forward instruments to swap currency denominated in U.S. dollars to Canadian dollars for a future intercompany payment from a U.S. subsidiary to a Canadian subsidiary. These instruments matured in April 2020 with combined notional amounts of $89.9 million. The objective of the instruments was to mitigate the foreign currency fluctuation risk related to intercompany payments denominated in a currency other than U.S. dollars, the Company’s functional currency. The instrument was not designated as a hedge. When these agreements settled in April 2020, the Company recognized a foreign exchange loss of $3.1 million in its Consolidated Statements of Operations.

In February 2018, the Company entered into a forward instrument to swap currency denominated in Brazilian real 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 Compass Minerals South America’s functional currency. The instrument was not designated as a hedge. During 2018, the Company recognized a net gain of $1.5 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 receivables 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 receivables and accounts payable denominated in a currency other than Compass Minerals South America’s functional currency. These forward contracts were not designated as hedges and matured in December 2018. During 2018, the Company recognized a net loss of $1.0 million in other expense in its Consolidated Statements of Operations for these forward contracts.

From time to time, the Company’s Brazilian subsidiary may enter into forward instruments to swap currency for sales invoices that are denominated in Brazilian real. These instruments are not material to the Company’s consolidated financial statements.

Foreign Currency Swaps Designated as Hedges

The Company has entered into euro-denominated debt instruments to provide funds for its operations in Brazil (see Note 10 for more information). The Company may also concurrently enter into foreign currency agreements whereby the Company agrees to swap interest and principal payments on loans denominated in euros for principal and interest payments denominated in Brazilian real, its South American 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 South American subsidiary’s functional currency. As of both December 31, 2020 and 2019, the Company had one swap agreement in place to hedge $10.5 million and $15.7 million, respectively, of loans denominated in a currency other than its South American subsidiary’s functional currency. Payments on the December 31, 2020, loan are due on various dates extending through February 2021, while payments on the December 31, 2019, loan were due on various dates extending through March 2020. As of both December 31, 2020 and 2019, the foreign currency derivative instrument qualified and was designated as a cash flow hedge. As of December 31, 2020, the Company expects to reclassify from accumulated other comprehensive loss to earnings during the next twelve months $2.6 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 derivatives as of December 31, 2020 and 2019 (in millions):

	Asset Derivatives			Liability Derivatives
Derivatives designated as hedging instruments:	Consolidated Balance Sheet Location	December 31, 2020		Consolidated Balance Sheet Location	December 31, 2020
Commodity contracts	Other current assets	$	0.4	Accrued expenses and other current liabilities	$	0.1
Commodity contracts	Other assets	0.1		Other noncurrent liabilities	0.2
Swap contracts	Other current assets	2.6		Accrued expenses and other current liabilities	—
Total derivatives designated as hedging instruments(a)(b)		$	3.1		$	0.3

(a)The Company has master netting agreements with its commodity hedge counterparties and accordingly has netted in its Consolidated Balance Sheets $0.3 million of its commodity contracts that are in payable positions against its contracts in receivable positions.

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

	Asset Derivatives			Liability Derivatives
Derivatives designated as hedging instruments:	Consolidated Balance Sheet Location	December 31, 2019		Consolidated Balance Sheet Location	December 31, 2019
Commodity contracts	Other current assets	$	0.3	Accrued expenses and other current liabilities	$	0.8
Commodity contracts	Other assets	0.1		Other noncurrent liabilities	0.2
Swap contracts	Other current assets	2.8		Accrued expenses and other current liabilities	—
Total derivatives designated as hedging instruments(a)(b)		$	3.2		$	1.0

(a)The Company has master netting agreements with its commodity hedge counterparties and accordingly has netted in its Consolidated Balance Sheets $0.4 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 swap contracts are receivable from both counterparties.

The following tables present activity related to other comprehensive (loss) income before taxes for the years ended December 31, 2020 and 2019 (in millions):

		Year Ended December 31, 2020
Derivatives in Cash Flow Hedging Relationships	Location of Gain Reclassified from Accumulated OCI Into Income (Effective Portion)	Amount of Gain Recognized in OCI on Derivative (Effective Portion)		Amount of Gain Reclassified from Accumulated OCI Into Income (Effective Portion)
Commodity contracts	Product cost	$	(1.8)	$	1.0
Swap contracts	Interest expense	(3.9)		3.6
Total		$	(5.7)	$	4.6

		Year Ended December 31, 2019
Derivatives in Cash Flow Hedging Relationships	Location of Gain Reclassified from Accumulated OCI Into Income Effective Portion)	Amount of Gain Recognized in OCI on Derivative (Effective Portion)		Amount of Gain Reclassified from Accumulated OCI Into Income (Effective Portion)
Commodity contracts	Product cost	$	(0.8)	$	0.9
Swap contracts	Interest expense	(2.5)		2.2
Total		$	(3.3)	$	3.1

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COMMITMENTS AND CONTINGENCIES

12 Months Ended

Dec. 31, 2020

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES

Contingent Obligations:

The Wisconsin Department of Agriculture, Trade and Consumer Protection (“DATCP”) has information indicating that agricultural chemicals are present within the subsurface area of the Company’s Kenosha, Wisconsin property. 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 directed the Company to conduct further investigations into the possible presence of agricultural chemicals in soil and ground water at the Kenosha property. The Company has completed initial on-property investigations and has provided the findings to DATCP. All investigations and mitigation activities to date, and any potential future remediation work, are being conducted under the Wisconsin Agricultural Chemical Cleanup Program (the “ACCP”), which provides for reimbursement of some of the costs. The Company may seek participation by, or cost reimbursement from, other parties responsible for the presence of any agricultural chemicals found in soil and ground water at this site if the Company does not receive an acknowledgment of no further action and is required to conduct further investigation or remedial work that may not be eligible for reimbursement under the ACCP.

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 8, the Company’s Brazilian subsidiaries are party to administrative tax proceedings and claims which totaled $7.9 million and $15.8 million as of December 31, 2020 and 2019, 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 has assumed liabilities for labor-related matters in connection with the acquisition of Compass Minerals South America, which are primarily related to compensation, labor benefits and consequential tax claims and totaled $3.5 million and $5.6 million as of December 31, 2020 and 2019, respectively. The Company believes the maximum exposure for these other labor matters totaled approximately $16 million and $25 million as of December 31, 2020 and 2019, respectively.

The Division of Enforcement of the U.S. Securities and Exchange Commission (“SEC”) 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 that the outcome of legal proceeding 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.

Approximately 50% of workforce in the U.S., Canada and the U.K. and approximately 30% of the Company’s global workforce is represented by collective bargaining agreements. Of the Company’s 12 collective bargaining agreements in effect on January 1, 2021, two will expire in 2021 (including one for the Goderich mine, which expires on March 31, 2021), five will expire in 2022, three will expire in 2023 and one will expire in 2027. In addition, trade union membership is mandatory in Brazil, where approximately 40% of the Company’s global workforce is located.

Commitments:

Royalties: The Company has various private, state and Canadian provincial leases associated with the salt and specialty potash businesses, most of which are renewable by the Company. Many of these leases provide for a royalty payment to the lessor based on a specific amount per ton of mineral extracted or as a percentage of revenue. Royalty expense related to these leases was $18.3 million, $16.3 million and $14.8 million for the years ended December 31, 2020, 2019 and 2018, respectively.

Performance Bonds: The Company has various salt and other deicing product sales contracts that include performance provisions governing delivery and product quality. These sales contracts either require the Company to maintain performance bonds for stipulated amounts or contain contractual penalty provisions in the event of non-performance. For the three years ended December 31, 2020, the Company has had no material penalties related to these sales contracts. At December 31, 2020, the Company had $51.4 million of outstanding performance bonds, which includes bonds related to Ontario mining tax reassessments.

Purchase Commitments: In connection with the operations of the Company’s facilities, the Company purchases utilities, other raw materials and services from third parties under contracts extending, in some cases, for multiple years. Purchases under these contracts are generally based on prevailing market prices. The Company has minimum throughput contracts with some of its depots and warehouses. The purchase commitments for these contracts are estimated to be $43.6 million for 2021, $13.3 million in 2022, $10.0 million in 2023, $7.8 million in 2024, $2.1 million in 2025 and $7.5 million thereafter.

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STOCKHOLDERS' EQUITY AND EQUITY INSTRUMENTS

12 Months Ended

Dec. 31, 2020

Equity [Abstract]

STOCKHOLDERS' EQUITY AND EQUITY INSTRUMENTS

STOCKHOLDERS’ EQUITY AND EQUITY INSTRUMENTS

The Company paid dividends of $2.88 per share in 2020 and currently intends to continue paying quarterly cash dividends. The declaration and payment of future dividends to holders of the Company’s common stock will be at the discretion of the Company’s Board of Directors and will depend upon many factors, including the Company’s financial condition, earnings, legal requirements, restrictions in its debt agreements (see Note 10) and other factors the Company’s Board of Directors deems relevant.

Non-Employee Director Compensation

Non-employee directors may defer all or a portion of the fees payable for their service into deferred stock units, equivalent to the value of the Company’s common stock. Beginning in May 2020, the annual fees related to the director’s equity compensation were granted in deferred stock units or restricted stock units and vest at the next annual meeting. Additionally, as dividends are declared on the Company’s common stock, these deferred stock units are entitled to accrete dividends in the form of additional units based on the stock price on the dividend payment date. Accumulated deferred stock units are distributed in the form of Company common stock at a future specified date or following resignation from the Board of Directors, based upon the director’s annual election. During the years ended December 31, 2020, 2019 and 2018, members of the Board of Directors were credited with 42,313, 33,883 and 26,291 deferred stock units, respectively. During the year ended December 31, 2020, the directors were granted 3,750 restricted stock units. During the years ended December 31, 2020, 2019 and 2018, 8,525, 9,041 and 6,728 shares of common stock, respectively, were issued from treasury shares for director compensation.

Preferred stock

The Company is authorized to issue up to 10,000,000 shares of preferred stock, of which no shares are currently issued or outstanding. Of those, 200,000 shares of preferred stock were designated as series A junior participating preferred stock in connection with the Company’s now expired rights agreement.

Equity Compensation Awards

In 2005, the Company adopted the 2005 Incentive Award Plan (as amended, the “2005 Plan”), which authorized the issuance of 3,240,000 shares of Company common stock. 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. Upon the approval of the 2015 Plan , the Company ceased issuing equity awards under the 2005 Plan. In May 2020, the Company’s stockholders approved the 2020 Incentive Award Plan (the “2020 Plan”), which authorizes the issuance of 2,977,933 shares of Company common stock. Since the date the 2020 Plan was approved, the Company ceased issuing equity awards under the 2015 Plan. The 2005 Plan, 2015 Plan and 2020 Plan allow for grants of equity awards to executive officers, other employees and directors, including shares of common stock, restricted stock units (“RSUs”), performance stock units (“PSUs”), stock options and deferred stock units.

Options

Substantially all of the stock options granted under each of the plans 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 day of grant.

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 weighted average assumptions and fair values for options granted for each of the years ended December 31 is included in the following table.

	2020			2019			2018
Fair value of options granted	$	10.91		$	9.15		$	8.77
Expected term (years)	4.8			4.5			4.5
Expected volatility	29.3		%	28.0		%	22.9		%
Dividend yield	3.5		%	4.1		%	3.6		%
Risk-free interest rates	1.6		%	2.3		%	2.5		%

RSUs

Most of the RSUs granted under the 2015 Plan and 2020 Plan vest after one to three years of service entitling the holders to one share of common stock for each vested RSU. The 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 that may be declared on the Company’s common stock equal to the per-share dividend declared. The closing stock price on the day of grant is used to determine the fair value of RSUs.

PSUs

Substantially all of the PSUs granted under the 2015 Plan and 2020 Plan are either total stockholder return PSUs (the “TSR PSUs”), return on invested capital PSUs (the “ROIC PSUs”) or earnings before interest, taxes, depreciation and amortization growth PSUs (“EBITDA 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 stockholder return to the total stockholder return for each company comprising the Company’s peer group over the three-year performance period and may range from 0% to 150% or 0% to 200% of the target number of shares based upon the attainment of these performance 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. The actual number of shares of common stock that may be earned with respect to EBITDA PSUs is calculated based on the attainment of EBITDA growth during the performance period.

EBITDA PSUs granted in 2020 have a two-year performance period that begins in 2021 and ends in 2022. Generally, TSR PSUs granted in 2020 have a three-year performance period that begins in 2020 and ends in 2022. Both types of PSUs granted in 2020 vest in the first quarter of 2023. PSUs represent a target number of shares of Company common stock that may be earned before adjustment based upon the attainment of certain performance conditions. Holders of PSUs 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 issued.

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 peer group. This model uses historical stock prices to estimate expected volatility and the Company’s correlation to the 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 and EBITDA PSUs. The Company will adjust the expense of the ROIC PSUs and EBITDA PSUs based upon its estimate of the number of shares that will ultimately vest at each interim date during the vesting period.

The following is a summary of the Company’s stock option, RSU and PSU activity and related information for the following periods:

	Stock Options			RSUs			PSUs
	Number	Weighted-average exercise price		Number	Weighted-average fair value		Number	Weighted-average fair value
Outstanding at December 31, 2017	562,877	$	75.89	70,856	$	74.63	112,036	$	79.48
Granted	250,514	59.61		42,013	60.28		67,235	64.30
Exercised(a)	—	—		—	—		—	—
Released from restriction(a)	—	—		(16,905)	88.78		(2,753)	78.92
Cancelled/Expired	(104,645)	71.65		(12,656)	66.53		(49,880)	85.51
Outstanding at December 31, 2018	708,746	$	70.76	83,308	$	65.75	126,638	$	69.06
Granted	369,716	54.15		218,071	49.73		123,003	56.88
Exercised(a)	—	—		—	—		—	—
Released from restriction(a)	—	—		(32,630)	66.95		—	—
Cancelled/Expired	(190,595)	69.06		(51,336)	54.87		(70,244)	67.20
Outstanding at December 31, 2019	887,867	$	64.21	217,413	$	52.07	179,397	$	61.43
Granted	94,945	58.91		95,276	58.24		107,072	74.73
Exercised(a)	(4,454)	57.02		—	—		—	—
Released from restriction(a)	—	—		(76,570)	50.03		(11,575)	78.87
Cancelled/Expired	(109,586)	69.00		(28,137)	51.85		(33,100)	68.18
Outstanding at December 31, 2020	868,772	$	63.06	207,982	$	55.68	241,794	$	65.57

(a)Common stock issued for exercised options, vested RSUs and vested and earned PSUs were issued from treasury shares.

As of December 31, 2019, there were 887,867 options outstanding of which 416,860 were exercisable. The following table summarizes information about options outstanding and exercisable at December 31, 2020.

	Options Outstanding				Options Exercisable
Range of exercise prices	Options outstanding	Weighted-average remaining contractual life (years)	Weighted-average exercise price of options outstanding		Options exercisable	Weighted-average remaining contractual life (years)	Weighted-average exercise price of exercisable options
$53.75 - $54.38	252,245	5.3	$	53.75	84,082	5.3	$	53.75
$54.39 - $59.21	159,424	5.7	57.01		18,836	5.2	55.01
$59.22 - $63.75	159,445	4.3	59.50		110,700	4.3	59.50
$63.76 - $69.77	119,357	3.1	68.03		104,796	3.0	68.01
$69.78 - $91.75	178,301	1.3	81.51		178,301	1.3	81.51
Totals	868,772	4.1	$	63.06	496,715	3.1	$	68.05

During the years ended December 31, 2020, 2019 and 2018, the Company recorded compensation expense of $9.9 million (includes $0.5 million paid in cash), $7.4 million (includes $1.1 million paid in cash) and $7.8 million, respectively, related to its stock-based compensation awards that are expected to vest. No amounts have been capitalized. The fair value of options vested was $1.4 million, $0.8 million and $2.7 million in 2020, 2019 and 2018, respectively.

As of December 31, 2020, unrecorded compensation cost related to non-vested awards of $14.7 million is expected to be recognized from 2021 through 2023, with a weighted average period of 1.8 years.

The intrinsic value of stock options exercised during the years ended December 31, 2020, 2019 and 2018 each totaled less than $0.1 million. As of December 31, 2020, the intrinsic value of options outstanding totaled $3.1 million, of which 496,715 options with an intrinsic value of $1.0 million were exercisable. The number of shares held in treasury is sufficient to cover all outstanding equity awards as of December 31, 2020.

Accumulated Other Comprehensive Loss

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 (loss) 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”) for the years ended December 31, 2020 and 2019 are as follows (in millions):

Year Ended December 31, 2020(a)	Gains and (Losses) on Cash Flow Hedges		Defined Benefit Pension		Foreign Currency		Total
Beginning balance	$	(0.6)	$	(6.9)	$	(184.6)	$	(192.1)
Other comprehensive income (loss) before reclassifications	3.9		(3.2)		(109.5)		(108.8)
Amounts reclassified from accumulated other comprehensive loss	(3.1)		0.7		—		(2.4)
Net current period other comprehensive income (loss)	0.8		(2.5)		(109.5)		(111.2)
Ending balance	$	0.2	$	(9.4)	$	(294.1)	$	(303.3)

Year Ended December 31, 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	2.2		(2.7)		21.1		20.6
Amounts reclassified from accumulated other comprehensive loss	(2.1)		0.3		—		(1.8)
Net current period other comprehensive income (loss)	0.1		(2.4)		21.1		18.8
Ending balance	$	(0.6)	$	(6.9)	$	(184.6)	$	(192.1)

(a)With the exception of the cumulative foreign currency translation adjustment, for which no tax effect is recorded, the changes in the components of AOCL presented in the table are reflected net of applicable income taxes.

Year Ended December 31, 2020	Amount Reclassified from AOCL		Line Item Impacted in the Consolidated Statement of Operations
Losses on cash flow hedges:
Natural gas instruments	$	(1.0)	Product cost
Foreign currency contracts	(3.6)		Interest expense
Income tax expense	1.5
Reclassifications, net of income taxes	(3.1)
Amortization of defined benefit pension:
Amortization of loss	$	0.9	Product cost
Income tax benefit	(0.2)
Reclassifications, net of income taxes	0.7
Total reclassifications, net of income taxes	$	(2.4)

Year Ended December 31, 2019	Amount Reclassified from AOCL		Line Item Impacted in the Consolidated Statement of Operations
Gains (losses) on cash flow hedges:
Natural gas instruments	$	(0.9)	Product cost
Foreign currency contracts	(2.2)		Interest Expense
Income tax expense	1.0
Reclassifications, net of income taxes	(2.1)
Amortization of defined benefit pension:
Amortization of loss	$	0.4	Product cost
Income tax benefit	(0.1)
Reclassifications, net of income taxes	0.3
Total reclassifications, net of income taxes	$	(1.8)

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FAIR VALUE MEASUREMENTS

12 Months Ended

Dec. 31, 2020

Fair Value Disclosures [Abstract]

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS

The Company’s financial instruments are measured and reported at their estimated fair value. Fair value is the price that would be received to sell 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 Savings Plans, which are valued based on readily available quoted market prices. The Company also holds short-term investments which are classified as trading securities with any gains or losses recognized through earnings. 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 11). The fair value of the natural gas derivative instruments and the foreign currency swaps 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).

	December 31, 2020		Level One		Level Two		Level Three
Asset Class:
Mutual fund investments in a non-qualified savings plan(a)	$	1.9	$	1.9	$	—	$	—
Derivatives – natural gas instruments, net	0.2		—		0.2		—
Derivatives - foreign currency contracts, net	2.6		—		2.6		—
Total Assets	$	4.7	$	1.9	$	2.8	$	—
Liability Class:
Liabilities related to non-qualified savings plan	$	(1.9)	$	(1.9)	$	—	$	—
Total Liabilities	$	(1.9)	$	(1.9)	$	—	$	—

(a)Includes mutual fund investments of approximately 30% in the common stock of large-cap U.S. companies, 10% in the common stock of small to mid-cap U.S. companies, 5% in the common stock of international companies, 15% in bond funds, 15% in short-term investments and 25% in blended funds.

	December 31, 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	2.8		—		2.8		—
Total Assets	$	4.2	$	1.4	$	2.8	$	—
Liability Class:
Liabilities related to non-qualified savings plan	$	(1.4)	$	(1.4)	$	—	$	—
Derivatives - natural gas instruments, net	(0.6)		—		(0.6)		—
Total Liabilities	$	(2.0)	$	(1.4)	$	(0.6)	$	—

(a)Includes mutual fund investments of approximately 30% 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, 10% in bond funds, 20% in short-term investments and 20% in blended funds.

Cash and cash equivalents, receivables (net of reserve for doubtful accounts) and accounts payable are carried at cost, which approximates fair value due to their liquid and short-term nature. The Company’s investments related to its nonqualified retirement plan of $1.9 million and $1.4 million as of December 31, 2020 and 2019, respectively, are stated at fair value based on quoted market prices. As of December 31, 2020 and 2019, the estimated fair value of the Company’s fixed-rate 4.875% Notes, based on available trading information (Level 2), totaled $260.3 million and $249.1 million, respectively, compared with the aggregate principal amount at maturity of $250.0 million. As of December 31, 2020 and 2019, the estimated fair value of the Company’s fixed-rate 6.75% Notes, based on available trading information (Level 2), totaled $543.1 million and $530.6 million, respectively, compared with the aggregate principal amount at maturity of $500.0 million. The fair value at December 31, 2020 and 2019 of 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 approximately $513.8 million and $552.8 million, respectively, compared with the aggregate principal amount at maturity of $520.3 million and $560.0 million, respectively. The Brazilian loans have floating rates and their fair value approximates their carrying value (see Note 10).

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OPERATING SEGMENTS

12 Months Ended

Dec. 31, 2020

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 and magnesium chloride for use in road deicing and dust control, food processing, water softeners and agricultural and industrial applications. SOP crop nutrients, industrial-grade SOP and micronutrients are produced and marketed through the Plant Nutrition North America segment. The Company’s 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. It also manufactures and markets specialty chemicals for the industrial chemical industry.

The accounting policies of the segments are the same as those described in the summary of significant accounting policies. All intersegment sales prices are market-based. The Company evaluates performance based on the operating earnings of the respective segments.

Segment information as of and for the years ended December 31, is as follows (in millions):

2020	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate& Other(a)		Total
Sales to external customers	$	779.4	$	239.6	$	344.4	$	10.1	$	1,373.5
Intersegment sales	—		5.4		0.3		(5.7)		—
Shipping and handling cost	217.8		34.0		14.8		—		266.6
Operating earnings (loss)	161.8		12.1		40.3		(73.7)		140.5
Depreciation, depletion and amortization	66.6		40.4		17.4		13.5		137.9
Total assets	1,020.8		520.8		579.2		141.6		2,262.4
Capital expenditures	56.8		12.5		9.6		6.0		84.9

2019	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate& Other(a)		Total
Sales to external customers	$	889.5	$	206.2	$	385.1	$	9.7	$	1,490.5
Intersegment sales	—		6.4		2.7		(9.1)		—
Shipping and handling cost	267.4		28.5		16.6		—		312.5
Operating earnings (loss)(b)	168.0		22.5		40.0		(66.9)		163.6
Depreciation, depletion and amortization	60.4		44.6		22.4		10.5		137.9
Total assets	1,056.3		575.5		715.3		96.1		2,443.2
Capital expenditures	65.9		15.2		10.5		6.5		98.1

2018	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate& Other(a)		Total
Sales to external customers	$	858.1	$	233.2	$	391.8	$	10.5	$	1,493.6
Intersegment sales	—		5.6		3.4		(9.0)		—
Shipping and handling cost	272.4		29.0		18.6		—		320.0
Operating earnings (loss)(b)	115.7		25.3		48.7		(59.4)		130.3
Depreciation, depletion and amortization	56.2		48.6		22.2		9.9		136.9
Total assets	948.9		589.3		709.9		119.8		2,367.9
Capital expenditures	58.7		20.7		10.1		7.3		96.8

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

Year Ended December 31, 2020	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate & Other(a)		Total
Highway Deicing Salt	$	473.8	$	—	$	—	$	—	$	473.8
Consumer & Industrial Salt	305.6		—		—		—		305.6
SOP and Specialty Plant Nutrients	—		245.0		272.8		—		517.8
Industrial Chemicals	—		—		71.9		—		71.9
Eliminations & Other	—		(5.4)		(0.3)		10.1		4.4
Sales to external customers	$	779.4	$	239.6	$	344.4	$	10.1	$	1,373.5

Year Ended December 31, 2019	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate & Other(a)		Total
Highway Deicing Salt	$	545.5	$	—	$	—	$	—	$	545.5
Consumer & Industrial Salt	344.0		—		—		—		344.0
SOP and Specialty Plant Nutrients	—		212.6		298.6		—		511.2
Industrial Chemicals	—		—		89.2		—		89.2
Eliminations & Other	—		(6.4)		(2.7)		9.7		0.6
Sales to external customers	$	889.5	$	206.2	$	385.1	$	9.7	$	1,490.5

Year Ended December 31, 2018	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate & Other(a)		Total
Highway Deicing Salt	$	532.0	$	—	$	—	$	—	$	532.0
Consumer & Industrial Salt	326.1		—		—		—		326.1
SOP and Specialty Plant Nutrients	—		238.8		300.2		—		539.0
Industrial Chemicals	—		—		95.0		—		95.0
Eliminations & Other	—		(5.6)		(3.4)		10.5		1.5
Sales to external customers	$	858.1	$	233.2	$	391.8	$	10.5	$	1,493.6

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

(b)In 2019, operating results included $2.8 million of additional logistics costs related to Mississippi River flooding and $2.3 million of severance and other costs related to executive transition. In 2018, corporate and other operating results included $5.1 million for executive transition costs.

Financial information relating to the Company’s operations by geographic area for the years ended December 31 is as follows (in millions):

Sales	2020		2019		2018
United States(a)	$	766.6	$	821.9	$	769.9
Canada	207.6		228.8		238.6
Brazil	336.6		375.2		381.8
United Kingdom	41.6		45.2		83.1
Other	21.1		19.4		20.2
Total sales	$	1,373.5	$	1,490.5	$	1,493.6

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

Financial information relating to the Company’s long-lived assets, excluding the investments related to the nonqualified retirement plan and pension plan assets, by geographic area as of December 31 (in millions):

Long-Lived Assets	2020		2019		2018
United States	$	532.9	$	561.5	$	551.6
Canada	514.0		522.8		497.4
United Kingdom	73.9		71.4		62.5
Brazil	376.0		493.1		524.8
Other	6.5		6.5		6.5
Total long-lived assets	$	1,503.3	$	1,655.3	$	1,642.8

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EARNINGS PER SHARE

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

EARNINGS PER SHARE

EARNINGS PER SHARE

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):

Year ended December 31,	2020		2019		2018
Numerator:
Net earnings	$	59.5	$	62.5	$	68.8
Less: Net earnings allocated to participating securities(a)	(1.3)		(1.1)		(0.5)
Net earnings available to common stockholders	$	58.2	$	61.4	$	68.3
Denominator (in thousands):
Weighted average common shares outstanding, shares for basic earnings per share(b)	33,928		33,882		33,848
Weighted average equity awards outstanding	—		—		—
Shares for diluted earnings per share	33,928		33,882		33,848
Net earnings per common share, basic	$	1.72	$	1.82	$	2.02
Net earnings per common share, diluted	$	1.72	$	1.81	$	2.02

(a)Participating securities include PSUs and RSUs that receive non-forfeitable dividends. Net earnings were allocated to participating securities of 397,000, 307,000 and 186,000 for 2020, 2019 and 2018, respectively.

(b)For the calculation of diluted 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 1,188,000, 1,067,000 and 788,000 weighted options outstanding for 2020, 2019 and 2018, respectively, which were anti-dilutive and therefore not included in the diluted earnings per share calculation.

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QUARTERLY RESULTS (Unaudited)

12 Months Ended

Dec. 31, 2020

Quarterly Financial Information Disclosure [Abstract]

QUARTERLY RESULTS (Unaudited)

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

Quarter	First		Second		Third		Fourth
2020
Sales	$	413.9	$	256.1	$	282.4	$	421.1
Gross profit	87.3		66.3		58.7		100.0
Net earnings (loss)(a)	27.6		1.7		(2.1)		32.3
Net earnings (loss) per share, basic(a)	0.80		0.04		(0.07)		0.94
Net earnings (loss) per share, diluted(a)	0.80		0.04		(0.07)		0.94
Basic weighted-average shares outstanding (in thousands)	33,892		33,915		33,947		33,958
Diluted weighted-average shares outstanding (in thousands)	33,892		33,915		33,947		33,977
2019
Sales	$	403.7	$	245.2	$	341.3	$	500.3
Gross profit	72.6		45.8		76.4		142.0
Net earnings (loss)(a)	7.6		(11.8)		10.6		56.1
Net earnings (loss) per share, basic(a)	0.22		(0.36)		0.31		1.64
Net earnings (loss) per share, diluted (a)	0.22		(0.36)		0.31		1.63
Basic weighted-average shares outstanding (in thousands)	33,874		33,883		33,884		33,886
Diluted weighted-average shares outstanding (in thousands)	33,874		33,883		33,884		33,886

(a)In the fourth quarter of 2020, the Company released a domestic tax reserve of $11.0 million. In the second quarter of 2019, the Company incurred $2.8 million ($2.1 million, net of tax) of additional logistics costs related to Mississippi River flooding. In the third quarter of 2019, the Company incurred $2.3 million ($1.7 million, net of tax) of severance and other costs related to executive transition.

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SUBSEQUENT EVENT

12 Months Ended

Dec. 31, 2020

Subsequent Events [Abstract]

SUBSEQUENT EVENT

SUBSEQUENT EVENT

Dividend Declared:

On February 25, 2021, the Board of Directors declared a quarterly cash dividend of $0.72 per share on the Company’s outstanding common stock, unchanged from the quarterly cash dividends paid in 2020. The dividend will be paid on March 19, 2021, to stockholders of record as of the close of business on March 10, 2021.

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Schedule II - Valuation Reserves

12 Months Ended

Dec. 31, 2020

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

Schedule II - Valuation Reserves

Schedule II — Valuation Reserves

Compass Minerals International, Inc.

December 31, 2020, 2019 and 2018

Description (in millions)	Balance at the Beginning of the Year		Additions (Deductions) Charged to Expense		Deductions(1)		Balance at the End of the Year
Deducted from Receivables — Allowance for Doubtful Accounts
2020	$	10.7	$	9.3	$	(8.9)	$	11.1
2019	9.9		4.7		(3.9)		10.7
2018	10.9		1.0		(2.0)		9.9
Deducted from Deferred Income Taxes — Valuation Allowance
2020	$	41.2	$	2.5	$	(0.3)	$	43.4
2019	40.9		0.3		—		41.2
2018(2)	10.2		39.2		(8.5)		40.9

(1)Deduction for purposes for which reserve was created.

(2)The 2018 additions primarily relate to foreign tax credits which offset a deferred tax asset. This amount was not charged to expense.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

Management Estimates

Management Estimates:The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) as included in the Accounting Standards Codification requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates.

Basis of Consolidation

Basis of Consolidation:The Company’s consolidated financial statements include the accounts of CMI and its wholly-owned domestic and foreign subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation.

Reclassifications

Reclassifications:The Company has made reclassifications of prior year amounts in Consolidated Statements of Operations to conform to current year presentation.

Foreign Currency

Foreign Currency:Assets and liabilities are translated into U.S. dollars at end of period exchange rates. Revenues and expenses are translated using the monthly average rates of exchange during the year. Adjustments resulting from the translation of foreign-currency financial statements into the reporting currency, U.S. dollars, are included in accumulated other comprehensive loss.

Revenue Recognition

Revenue Recognition:

The Financial Accounting Standards Board (the “FASB”) revenue recognition guidance provides a single, comprehensive model for recognizing revenue from contracts with customers. The revenue recognition model requires revenue to be recognized upon the transfer of promised goods or services to customers in an amount that reflects the consideration an entity expects to receive in exchange for those goods or services. The Company’s revenue arrangements generally consist of a single performance obligation to transfer promised goods or services. Accordingly, substantially all of the Company’s revenue is recognized at a point in time when control of the goods transfers to the customer.

The Company typically recognizes revenue at the time of shipment to the customer, which coincides with the transfer of title and risk of ownership to the customer. Sales represent billings to customers net of sales taxes charged for the sale of the product. Sales include amounts charged to customers for shipping and handling costs, which are expensed when the related product is sold.

Cash and Cash Equivalents

Cash and Cash Equivalents: The Company considers all investments with original maturities of three months or less to be cash equivalents. The Company maintains the majority of its cash in bank deposit accounts with several commercial banks with high credit ratings in the U.S., Canada, Brazil and Europe. Typically, the Company has bank deposits in excess of federally insured limits. Currently, the Company does not believe it is exposed to significant credit risk on its cash and cash equivalents.

Accounts Receivable and Allowance for Doubtful Accounts

Accounts Receivable and Allowance for Doubtful Accounts: Receivables consist almost entirely of trade accounts receivable. Trade accounts receivable are recorded at the invoiced amount and do not bear interest. The allowance for doubtful accounts is the Company’s best estimate of the amount of probable credit losses in its existing trade accounts receivable. The Company determines the allowance based on historical write-off experience by business line and a current assessment of its portfolio, including information regarding individual customers. The Company reviews its past due account balances for collectability and adjusts its allowance for doubtful accounts accordingly. Account balances are charged off against the allowance when the Company believes it is probable that the trade accounts receivable will not be recovered.

Inventories

Inventories:Inventories are stated at the lower of cost or net realizable value. Finished goods and raw material and supply costs are valued using the average cost method on a first-in-first-out basis. Raw materials and supply costs primarily consist of raw materials purchased to aid in the production of mineral and chemical products, maintenance materials and packaging materials. Finished goods are primarily comprised of salt, magnesium chloride, and plant nutrition and chemical products readily available for sale. Substantially all costs associated with the production of finished goods at the Company’s production locations are captured as inventory costs. As required by U.S. GAAP, a portion of the fixed costs at a location are not included in inventory and are expensed as a product cost if production at that location is determined to be abnormally low in any period. Additionally, since the Company’s products are often stored at third-party warehousing locations, the Company includes in the cost of inventory the freight and handling costs necessary to move the product to storage until the product is sold to a customer.

Other Current Assets

Other Current Assets:In the fourth quarter of 2015, the Company began marketing certain assets used in farming operations. Management remains committed to sell these assets, and the assets continue to be marketed at a reasonable price. The Company has performed an impairment analysis and concluded that the fair market value of these assets exceeds their carrying value. These assets have been recorded in other current assets in the Consolidated Balance Sheets as of December 31, 2020 and 2019.

Property, Plant and Equipment

Property, Plant and Equipment:

Property, plant and equipment is stated at cost and includes capitalized interest. The costs of replacements or renewals, which improve or extend the life of existing property, are capitalized. Maintenance and repairs are expensed as incurred. Upon retirement or disposition of an asset, any resulting gain or loss is included in the Company’s operating results.

Property, plant and equipment also includes mineral interests. The mineral interests for the Company’s Winsford U.K. mine are owned. The Company leases probable mineral reserves at its Cote Blanche and Goderich mines, its Ogden facility and several of its other North American facilities. These leases have varying terms, and many provide for a royalty payment to the lessor based on a specific amount per ton of mineral extracted or as a percentage of sales. The Company’s rights to extract minerals are contractually limited by time. The Cote Blanche mine is operated under land and mineral leases, and the mineral lease expires in 2060 with two additional 25-year renewal periods. The Goderich mine mineral reserve lease expires in 2022

with the Company’s option to renew until 2043 after demonstrating to the lessor that the mine’s useful life is greater than the lease’s term. The Ogden facility mineral reserve lease renews annually. The Company believes it will be able to continue to extend lease agreements as it has in the past, at commercially reasonable terms, without incurring substantial costs or material modifications to the existing lease terms and conditions, and therefore, management believes that assigned lives are appropriate. The Company’s mineral interests are depleted on a units-of-production basis based upon the latest available mineral study. The weighted average amortization period for the leased probable mineral reserves is 90 years as of December 31, 2020. The Company also owns other mineral properties. The weighted average life for the probable owned mineral reserves is 36 years as of December 31, 2020, based upon management’s current production estimates.

Buildings and structures are depreciated on a straight-line basis over lives generally ranging from 10 to 30 years. Portable buildings generally have shorter lives than permanent structures. Leasehold and building improvements typically have shorter estimated lives of 5 to 20 years or lower based on the life of the lease to which the improvement relates.

The Company’s fixed assets are amortized on a straight-line basis over their respective lives. The following table summarizes the estimated useful lives of the Company’s different classes of property, plant and equipment:

	Years
Land improvements	10 to 25
Buildings and structures	10 to 30
Leasehold and building improvements	2 to 40
Machinery and equipment – vehicles	2 to 10
Machinery and equipment – other mining and production	2 to 50
Office furniture and equipment	2 to 10
Mineral interests	20 to 99

The Company has finance leases which are recorded in property, plant and equipment at the beginning of the lease at the lower of the fair value of the leased property or the present value of the minimum lease payments. Lease payments are recorded as interest expense and a reduction of the lease liability. A finance lease asset is depreciated over the lower of its useful life or the lease term.

The Company has capitalized computer software costs of $13.4 million and $16.0 million as of December 31, 2020 and 2019, respectively, recorded in property, plant and equipment. The capitalized costs are being amortized over five years. The Company recorded $5.8 million, $6.6 million and $7.3 million of amortization expense related to capitalized computer software for 2020, 2019 and 2018, respectively.

The Company recognizes and measures obligations related to the retirement of tangible long-lived assets in accordance with applicable U.S. GAAP. Asset retirement obligations are not material to the Company’s consolidated financial position, results of operations or cash flows.

The Company reviews its long-lived assets and the related mineral reserves for impairment whenever events or changes in circumstances indicate the carrying amounts of such assets may not be recoverable. If an indication of a potential impairment exists, recoverability of the respective assets is determined by comparing the forecasted undiscounted net cash flows of the operation to which the assets relate, to the carrying amount, including associated intangible assets, of such operation. If the operation is determined to be unable to recover the carrying amount of its assets, then intangible assets are written down first, followed by the other long-lived assets of the operation, to fair value. Fair value is determined based on discounted cash flows or appraised values, depending upon the nature of the assets.

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 adopted this guidance on January 1, 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 elected the 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.

Goodwill and Intangible Assets

Goodwill and Intangible Assets:The Company amortizes its intangible assets deemed to have finite lives on a straight-line basis over their estimated useful lives which, for the Company, range from 4 to 50 years. The Company reviews goodwill and other indefinite-lived intangible assets annually for impairment. In addition, goodwill and other intangible assets are reviewed when an event or change in circumstances indicates the carrying amounts of such assets may not be recoverable.

Investments

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. The Company may recognize its share of an investee’s earnings on a lag, if an investee’s financial results are not available in a timely manner.

The Company’s Brazilian subsidiary holds a 50% interest in Fermavi Eletroquímica Ltda. (“Fermavi”). Fermavi, which was founded in 1987, is a Brazilian corporation with headquarters in Varginha, Minas Gerais, Brazil, and its operations focus on the production and sale of manganese-based products. The Company’s investment in Fermavi was recorded at its estimated fair value in conjunction with the purchase price allocation as of the date the Company completed the full acquisition of Compass Minerals América do Sul Indústria e Comércio Ltda. (“Compass Minerals South America”), which was in excess of the book value of net assets acquired. This basis difference was approximately $2 million and $4 million as of December 31, 2020 and 2019, respectively. The portion of the basis differences related to tangible and intangible assets is amortized over their remaining useful lives, as appropriate. The Company accounts for its investment in Fermavi under the equity method of accounting.

Marketable Securities

The marketable securities are classified as trading securities and accordingly, gains and losses are recorded as a component of other expense (income), net in the Consolidated Statements of Operations.

Income Taxes

Income Taxes:

The Company accounts for income taxes using the liability method in accordance with the provisions of GAAP. Under the liability method, deferred taxes are determined based on the differences between the consolidated financial statements and the tax basis of assets and liabilities using enacted tax rates in effect in the years in which the differences are expected to reverse. The Company’s foreign subsidiaries file separate company returns in their respective jurisdictions.

The Company recognizes potential liabilities in accordance with applicable GAAP for anticipated tax issues in the U.S. and other tax jurisdictions based on its estimate of whether, and the extent to which, additional taxes will be due. If payment of these amounts ultimately proves to be unnecessary, the reversal of the liabilities would result in tax benefits being recognized in the period when the Company determines the liabilities are no longer necessary. If the Company’s estimate of tax liabilities proves to be less than the ultimate assessment, a further charge to expense would result. Any penalties and interest that are accrued on the Company’s uncertain tax positions are included as a component of income tax expense.

In evaluating the Company’s ability to realize deferred tax assets, the Company considers the sources and timing of taxable income, including the reversal of existing temporary differences, the ability to carryback tax attributes to prior periods, qualifying tax-planning strategies, and estimates of future taxable income exclusive of reversing temporary differences. In determining future taxable income, the Company’s assumptions include the amount of pre-tax operating income according to different state, federal and international taxing jurisdictions, the origination of future temporary differences, and the implementation of feasible and prudent tax-planning strategies.

If the Company determines that a portion of its deferred tax assets will not be realized, a valuation allowance is recorded in the period that such determination is made. In the future, if the Company determines, based on the existence of sufficient evidence, that more or less of the deferred tax assets are more likely than not to be realized, an adjustment to the valuation allowance will be made in the period such a determination is made.

As discussed in Note 8, on December 22, 2017, the U.S. enacted the Tax Cuts and Jobs Act (the “Act”) which subjects U.S. shareholders, including the Company, to tax on Global Intangible Low-Taxed Income (“GILTI”) earned by certain foreign subsidiaries. The FASB issued guidance stating that an entity can make an accounting policy election to either recognize deferred taxes for temporary basis differences expected to reverse as GILTI in future years or to provide for the tax expense related to GILTI in the year the tax is incurred as a period expense only. The Company has elected to account for GILTI as a period expense only.

Environmental Costs

Environmental Costs:Environmental costs, other than those of a capital nature, are accrued at the time the exposure becomes known and costs can be reasonably estimated. Costs are accrued based upon management’s estimates of all direct costs.

Equity Compensation Plans

Equity Compensation Plans:The Company has equity compensation plans under the oversight of the Company’s Board of Directors, whereby stock options, restricted stock units, performance stock units, deferred stock units and shares of common stock are granted to the Company’s employees and directors.

Earnings per Share

Earnings per Share:When calculating earnings per share, the Company’s participating securities are accounted for under the two-class method. The two-class method requires allocating the Company’s net earnings to both common shares and participating securities based upon their rights to receive dividends. Basic earnings per share is computed by dividing net earnings available to common stockholders by the weighted-average number of outstanding common shares during the period. Diluted earnings per share reflects the potential dilution that could occur under the more dilutive of either the treasury stock method or the two-class method for calculating the weighted-average number of outstanding common shares. The treasury stock method is calculated assuming unrecognized compensation expense, income tax benefits and proceeds from the potential exercise of employee stock options are used to repurchase common stock.

Derivatives

Derivatives:The Company is exposed to the impact of fluctuations in foreign exchange and interest rates on its borrowings and fluctuations in the purchase price of natural gas consumed in operations. The Company hedges portions of these risks through the use of derivative agreements. The Company records derivative financial instruments as assets or liabilities measured at fair value. Accounting for the changes in the fair value of a derivative depends on its designation and effectiveness. 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. For qualifying hedges, the effective portion of 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 Consolidated Statements of Operations. Until the effective portion of a derivative’s change in fair value is recognized in the Consolidated Statements of Operations, the change in fair value is recognized in other comprehensive income. For derivative instruments that are not accounted for as hedges, or for the ineffective portions of qualifying hedges, the change in fair value is recorded through earnings in the period of change. The Company formally documents, designates and assesses the effectiveness of transactions that receive hedge accounting treatment initially and on an ongoing basis.

Concentration of Credit Risk

Concentration of Credit Risk:The Company sells its salt and magnesium chloride products to various governmental agencies, manufacturers, distributors and retailers primarily in the Midwestern U.S. and throughout Canada and the U.K. The Company’s plant nutrition products are sold across the Western Hemisphere and globally. No single customer or group of affiliated customers accounted for more than 10% of the Company’s sales in any year during the three-year period ended December 31, 2020, or more than 10% of receivables at December 31, 2020 or 2019.

Recent Accounting Pronouncements

Recent Accounting Pronouncements:

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 adoption of this guidance on January 1, 2020, did not have an impact on the Company’s consolidated financial statements.

On January 1, 2020, the Company adopted guidance issued by the FASB related to credit losses for financial instruments, which replaces the incurred loss methodology with a current expected credit loss methodology (“CECL”). The Company has determined that its receivables are the only financial instrument that is within scope of this CECL guidance. The CECL methodology requires financial assets to be recorded at the net amount expected to be collected over the lifetime of the asset such that the estimated losses are accrued on the day the asset is acquired. The CECL methodology also requires financial assets to be aggregated and evaluated within pools with similar risk characteristics.

The Company has recorded an allowance on its receivables based on historical loss rates modified to consider supportable forecasts related to customer-specific and macroeconomic factors. For instance, the Company’s 2020 allowance for doubtful

accounts considered the potential impact that the COVID-19 pandemic could have on the collectability of its outstanding receivables. The Company’s customer pools are comprised of North American highway deicing customers, U.K. highway deicing customers, U.K. storage customers, North American consumer and industrial customers, Plant Nutrition North America customers, Plant Nutrition South America customers and customers whose outstanding receivable balances have been sent to collections or put on a payment plan. Customers grouped within these pools have similar risk characteristics. The Company’s allowance for doubtful accounts consists of estimates of expected credit losses and accruals for returns and allowances. At the transition date of January 1, 2020, the implementation of CECL had an immaterial impact of less than $0.1 million on the Company’s consolidated financial statements. Under CECL, the Company had an allowance for doubtful accounts of $9.4 million and $11.1 million as of January 1, 2020, and December 31, 2020, respectively.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

Schedule of estimated useful lives of property, plant and equipment

The following table summarizes the estimated useful lives of the Company’s different classes of property, plant and equipment:

	Years
Land improvements	10 to 25
Buildings and structures	10 to 30
Leasehold and building improvements	2 to 40
Machinery and equipment – vehicles	2 to 10
Machinery and equipment – other mining and production	2 to 50
Office furniture and equipment	2 to 10
Mineral interests	20 to 99

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LEASES (Tables)

12 Months Ended

Dec. 31, 2020

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	December 31, 2020		December 31, 2019
Assets
Operating lease assets	Other assets	$	55.6	$	53.7
Finance lease assets	Property, plant and equipment, net	7.2		5.8
Total lease assets		$	62.8	$	59.5
Liabilities
Current liabilities:
Operating	Accrued expenses and other current liabilities	$	14.8	$	12.8
Finance	Accrued expenses and other current liabilities	1.3		1.1
Noncurrent liabilities:
Operating	Other noncurrent liabilities	42.8		41.0
Finance	Other noncurrent liabilities	7.0		6.2
Total lease liabilities		$	65.9	$	61.1

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

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

	Year Ended December 31, 2020		Year Ended December 31, 2019
Finance lease cost:
Amortization of lease assets	$	1.8	$	1.1
Interest on lease liabilities	0.6		0.6
Operating lease cost	17.4		19.2
Variable lease cost(a)	11.7		18.8
Total lease cost	$	31.5	$	39.7

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

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

	December 31, 2020		December 31, 2019
Weighted-average remaining lease term (years)
Operating leases	7.0		7.7
Finance leases	9.3		7.2
Weighted-average discount rate
Operating leases	3.7	%	4.3	%
Finance leases	7.3	%	7.6	%

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

	Year Ended December 31, 2020		Year Ended December 31, 2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$	15.3	$	18.9
Operating cash flows from finance leases	0.6		0.6
Financing cash flows from finance leases	1.8		1.3
Leased assets obtained in exchange for new operating lease liabilities	16.5		20.3
Leased assets obtained in exchange for new finance lease liabilities	3.8		0.2

Schedule of Operating Lease Maturities

Maturities of lease liabilities are as follows (in millions):

	Operating Leases		Finance Leases		Total
2021	$	16.4	$	1.8	$	18.2
2022	13.1		1.2		14.3
2023	8.4		1.1		9.5
2024	5.7		0.9		6.6
2025	4.9		0.9		5.8
After 2025	18.0		6.1		24.1
Total lease payments	66.5		12.0		78.5
Less: Interest	(8.9)		(3.7)		(12.6)
Present value of lease liabilities	$	57.6	$	8.3	$	65.9

Schedule of Financing Lease Maturities

Maturities of lease liabilities are as follows (in millions):

	Operating Leases		Finance Leases		Total
2021	$	16.4	$	1.8	$	18.2
2022	13.1		1.2		14.3
2023	8.4		1.1		9.5
2024	5.7		0.9		6.6
2025	4.9		0.9		5.8
After 2025	18.0		6.1		24.1
Total lease payments	66.5		12.0		78.5
Less: Interest	(8.9)		(3.7)		(12.6)
Present value of lease liabilities	$	57.6	$	8.3	$	65.9

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INVENTORIES (Tables)

12 Months Ended

Dec. 31, 2020

Inventory Disclosure [Abstract]

Schedule of inventories

Inventories consist of the following at December 31 (in millions):

	2020		2019
Finished goods	$	287.4	$	235.3
Raw materials and supplies	83.2		76.2
Total inventories	$	370.6	$	311.5

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PROPERTY, PLANT AND EQUIPMENT (Tables)

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

Schedule of property, plant and equipment

Property, plant and equipment consists of the following at December 31 (in millions):

	2020		2019
Land, buildings and structures and leasehold improvements	$	626.8	$	596.0
Machinery and equipment	1,085.1		1,001.9
Office furniture and equipment	53.3		60.7
Mineral interests	172.4		171.1
Construction in progress	58.7		141.3
	1,996.3		1,971.0
Less accumulated depreciation and depletion	(1,031.4)		(940.2)
Property, plant and equipment, net	$	964.9	$	1,030.8

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GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of finite-lived intangible assets

The asset value and accumulated amortization as of December 31, 2020 and 2019 for the finite-lived intangibles assets are as follows (in millions):

	Supply Agreement		SOP Production Rights		Customer/Distributor Relationships		Lease Rights		Trade Names		Developed Technologies		Patents		Other		Total
December 31, 2020
Gross intangible asset	$	28.5	$	24.3	$	11.6	$	1.8	$	30.3	$	26.2	$	16.2	$	1.3	$	140.2
Accumulated amortization	(5.7)		(16.6)		(6.8)		(0.6)		(11.8)		(21.4)		(9.6)		(1.0)		(73.5)
Net intangible assets	$	22.8	$	7.7	$	4.8	$	1.2	$	18.5	$	4.8	$	6.6	$	0.3	$	66.7

	Supply Agreement		SOP Production Rights		Customer/Distributor Relationships		Lease Rights		Trade Names		Developed Technologies		Patents		Other		Total
December 31, 2019
Gross intangible asset	$	27.9	$	24.3	$	12.7	$	1.7	$	36.8	$	32.8	$	16.0	$	1.3	$	153.5
Accumulated amortization	(5.0)		(15.6)		(6.1)		(0.5)		(10.9)		(21.7)		(8.1)		(0.9)		(68.8)
Net intangible assets	$	22.9	$	8.7	$	6.6	$	1.2	$	25.9	$	11.1	$	7.9	$	0.4	$	84.7

Schedule of estimated lives of intangible assets

The estimated lives of the Company’s finite-lived intangible assets are as follows:

Intangible asset	Estimated Lives
Supply agreement	50 years
SOP production rights	25 years
Patents	10-20 years
Developed technology	4-7 years
Lease rights	25 years
Customer and distributor relationships	10-14 years
Trademarks	10 years
Trade names	10-11 years

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INCOME TAXES (Tables)

12 Months Ended

Dec. 31, 2020

Income Tax Disclosure [Abstract]

Schedule of income tax provision (benefit) related to earnings

The following table summarizes the Company’s income tax provision for the years ended December 31 (in millions):

	2020		2019		2018
Current:
Federal	$	(22.3)	$	5.3	$	8.1
State	0.4		2.0		4.3
Foreign	28.2		26.6		13.1
Total current	6.3		33.9		25.5
Deferred:
Federal	1.2		(7.2)		(8.6)
State	(1.2)		(1.9)		(0.5)
Foreign	5.4		(2.7)		(7.6)
Total deferred	5.4		(11.8)		(16.7)
Total provision for income taxes	$	11.7	$	22.1	$	8.8

Schedule of income tax expense reconciliation

The following table summarizes components of earnings before income taxes and shows the tax effects of significant adjustments from the expected income tax expense computed at the federal statutory rate for the years ended December 31 (in millions):

	2020			2019			2018
U.S. (loss) income	$	(4.1)		$	31.7		$	(80.6)
Foreign income	75.3			52.9			158.2
Earnings before income taxes	$	71.2		$	84.6		$	77.6
Computed tax at the U.S. federal statutory rate of 21%	15.0			17.8			16.3
Foreign income rate differential, mining, and withholding taxes, net of U.S. federal deduction	9.3			10.2			0.9
Percentage depletion in excess of basis	(4.4)			(5.8)			(4.7)
Other domestic tax reserves, net of reversals	(9.7)			0.2			1.5
State income taxes, net of federal income tax benefit	(0.9)			—			2.1
Change in valuation allowance on deferred tax asset	2.4			0.2			(5.7)
Interest expense recognition differences	(3.5)			(3.5)			(3.6)
GILTI	3.8			1.0			1.0
Tax Cuts and Jobs Act of 2017	—			1.6			(3.0)
Tax on repatriated amounts	—			0.9			3.4
Transfer pricing settlement with taxing authorities	—			—			2.2
Other, net	(0.3)			(0.5)			(1.6)
Provision for income taxes	$	11.7		$	22.1		$	8.8
Effective tax rate	16		%	26		%	11		%

Schedule of significant components of deferred tax assets and liabilities

The significant components of the Company’s deferred tax assets and liabilities were as follows at December 31 (in millions):

	2020		2019
Deferred tax assets:
Reluz Nordeste Indústria e Comércio Ltda net operating loss carryforwards	$	0.4	$	0.6
Compass Minerals South America net operating loss carryforwards	—		3.3
Excess interest expense	9.9		14.9
Foreign tax credit	39.4		38.1
Right of use lease liability	11.3		11.1
Stock-based compensation	2.0		2.3
Other, net	20.5		16.5
Total deferred tax assets before valuation allowance	83.5		86.8
Valuation allowance	(42.0)		(39.8)
Total deferred tax assets	41.5		47.0
Deferred tax liabilities to be netted with deferred tax assets:
Property, plant and equipment	17.2		21.2
Right of use lease asset	11.3		11.1
Other, net	1.4		1.0
Total deferred tax liabilities to be netted with deferred tax assets	29.9		33.3
Net noncurrent deferred tax assets	$	11.6	$	13.7
Deferred tax assets to be netted with deferred tax liabilities:
Net operating loss carryforwards	$	1.7	$	2.2
Right of use lease liability	1.9		0.9
Other, net	0.9		2.1
Total deferred tax assets before valuation allowance	4.5		5.2
Valuation allowance	(1.4)		(1.4)
Total deferred tax assets to be netted with deferred tax liabilities	3.1		3.8
Deferred tax liabilities:
Property, plant and equipment	66.5		63.7
Intangible asset	22.2		29.1
Right of use lease asset	1.9		0.9
Total deferred tax liabilities	90.6		93.7
Net deferred tax liabilities	$	87.5	$	89.9

Schedule of reconciliation of unrecognized tax benefits

The following table shows a reconciliation of the beginning and ending amount of unrecognized tax benefits (in millions):

	2020		2019		2018
Unrecognized tax benefits:
Balance at January 1	$	47.4	$	50.9	$	67.4
Additions resulting from current year tax positions	—		0.2		8.0
Additions relating to tax positions taken in prior years	1.4		4.5		2.6
Reductions due to settlements	—		—		(25.0)
Reductions due to cash payments	—		(7.5)		—
Reductions relating to tax positions taken in prior years	(0.1)		(0.4)		(0.3)
Reductions due to expiration of tax years	(10.4)		(0.3)		(1.8)
Balance at December 31	$	38.3	$	47.4	$	50.9

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PENSION PLANS AND OTHER BENEFITS (Tables)

12 Months Ended

Dec. 31, 2020

Retirement Benefits [Abstract]

Schedule of weighted-average asset allocations

The weighted-average asset allocations by asset category are as follows:

	Plan Assets at December 31,
Asset Category	2020		2019
Cash and cash equivalents	2	%	3	%
Blended funds	48	%	51	%
Bond funds	50	%	46	%
Total	100	%	100	%

Schedule of fair value of pension plan assets

The fair value of the Company’s U.K. pension plan assets at December 31, 2020 and 2019, by asset category (see Note 14 for a discussion regarding fair value measurements) are as follows (in millions):

	December 31, 2020		Level One		Level Two		Level Three
Asset category:
Cash and cash equivalents(a)	$	1.3	$	1.3	$	—	$	—
Blended funds(b)	34.9		—		34.9		—
Bond funds(c):
Treasuries	35.9		—		35.9		—
Total Pension Assets	$	72.1	$	1.3	$	70.8	$	—

	December 31, 2019		Level One		Level Two		Level Three
Asset category:
Cash and cash equivalents(a)	$	1.9	$	1.9	$	—	$	—
Blended funds(b)	33.6		—		33.6		—
Bond funds(c):
Treasuries	30.1		—		30.1		—
Total Pension Assets	$	65.6	$	1.9	$	63.7	$	—

(a)The fair value of cash and cash equivalents is its carrying value.

(b)The Company is invested in a diversified growth fund. The diversified growth fund is valued at the last traded or official close for the underlying equities and bid or mid for the underlying fixed income securities depending on the portfolio benchmark. Where representative prices are unavailable, underlying fixed income investments are valued based on other observable market-based inputs.

(c)This category includes investments in investment-grade fixed-income instruments and funds linked to U.K. treasury notes. The funds are valued using the bid amounts for each fund. All of the Company’s bond fund pension assets are invested in U.K.-linked treasuries as of December 31, 2020 and 2019.

Schedule of assumptions used in determining pension information

The assumptions used in determining pension information for the U.K. pension plan for the years ended December 31 were as follows:

	2020		2019		2018
Discount rate	1.20	%	2.00	%	2.90	%
Expected return on plan assets	3.10	%	3.10	%	3.70	%

Schedule of future expected benefit payments

The Company expects to pay the following benefit payments (in millions):

Calendar Year	Future Expected Benefit Payments
2021	$	3.2
2022	3.2
2023	3.3
2024	3.4
2025	3.4
2026-2030	18.4

Schedule of pension obligations, plan assets and net funded status

The following table sets forth pension obligations and plan assets for the Company’s U.K. pension plan, as of December 31 (in millions):

	2020		2019
Change in benefit obligation:
Benefit obligation as of January 1	$	64.1	$	58.6
Interest cost	1.2		1.7
Actuarial loss	8.3		4.8
Plan amendment	0.1		—
Benefits paid	(2.9)		(3.5)
Currency fluctuation adjustment	2.5		2.5
Benefit obligation as of December 31	73.3		64.1
Change in plan assets:
Fair value as of January 1	65.6		60.7
Actual return	6.7		4.2
Company contributions	0.4		1.7
Currency fluctuation adjustment	2.3		2.5
Benefits paid	(2.9)		(3.5)
Fair value of plan assets as of December 31	72.1		65.6
(Underfunded) Overfunded status of the plan	$	(1.2)	$	1.5

Schedule of components of net pension expense

The components of net periodic pension cost (benefit) were as follows for the years ended December 31 (in millions):

	2020		2019		2018
Interest cost on projected benefit obligation	$	1.2	$	1.7	$	1.6
Prior service cost	(0.1)		(0.1)		(0.1)
Expected return on plan assets	(1.9)		(2.2)		(2.5)
Plan amendment	0.1		—		—
Net amortization	1.0		0.5		0.3
Net periodic pension cost (benefit)	$	0.3	$	(0.1)	$	(0.7)

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LONG TERM DEBT (Tables)

12 Months Ended

Dec. 31, 2020

Debt Disclosure [Abstract]

Schedule of long-term debt

Long-term debt consists of the following at December 31 (in millions):

	2020		2019
4.875% Senior Notes due July 2024	$	250.0	$	250.0
Term Loan due January 2025	390.0		400.0
Revolving Credit Facility due January 2025	130.3		160.0
6.75% Senior Notes due December 2027	500.0		500.0
AR Securitization Facility expires June 2023	51.2		—
3.7% Banco Itaú loan due March 2020	—		15.4
Banco Santander loan due October 2020	—		16.2
Banco Itaú loan due February 2021	10.4		—
Banco Rabobank loan due July 2021	6.8		17.4
Banco BTG loan due July 2021	2.6		—
Banco Santander loan due September 2021	—		19.9
Banco do Brasil loan due September 2021	9.6		12.4
Banco Rabobank loan due September 2021	6.8		—
Banco BTG loan due October 2021	2.6		—
Banco Rabobank loan due November 2021	13.5		17.4
Banco Santander loan due December 2021	—		14.9
Banco BTG loan due January 2022	1.0		—
Banco Votorantim loan due February 2022	7.7		—
Banco Bradesco loan due February 2022	4.8		—
Banco Santander loan due March 2022	2.9		—
Banco BTG loan due April 2022	1.0		—
Banco BTG loan due July 2022	2.6		—
Banco Safra loan due October 2022	3.9		—
Banco Santander loan due October 2022	12.5		—
Financiadora de Estudos e Projetos loan due November 2023	4.1		7.2
	1,414.3		1,430.8
Less unamortized debt issuance costs	(12.9)		(14.8)
Total debt	1,401.4		1,416.0
Less current portion	(63.7)		(52.1)
Long-term debt	$	1,337.7	$	1,363.9

Schedule of future maturities of long-term debt

Future maturities of long-term debt for the years ending December 31, are as follows (in millions):

	Debt Maturity
2021	$	63.7
2022	57.8
2023	72.5
2024	270.0
2025	450.3
Thereafter	500.0
Total	$	1,414.3

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DERIVATIVE FINANCIAL INSTRUMENTS (Tables)

12 Months Ended

Dec. 31, 2020

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of fair value of hedged items

The following tables present the fair value of the Company’s derivatives as of December 31, 2020 and 2019 (in millions):

	Asset Derivatives			Liability Derivatives
Derivatives designated as hedging instruments:	Consolidated Balance Sheet Location	December 31, 2020		Consolidated Balance Sheet Location	December 31, 2020
Commodity contracts	Other current assets	$	0.4	Accrued expenses and other current liabilities	$	0.1
Commodity contracts	Other assets	0.1		Other noncurrent liabilities	0.2
Swap contracts	Other current assets	2.6		Accrued expenses and other current liabilities	—
Total derivatives designated as hedging instruments(a)(b)		$	3.1		$	0.3

(a)The Company has master netting agreements with its commodity hedge counterparties and accordingly has netted in its Consolidated Balance Sheets $0.3 million of its commodity contracts that are in payable positions against its contracts in receivable positions.

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

	Asset Derivatives			Liability Derivatives
Derivatives designated as hedging instruments:	Consolidated Balance Sheet Location	December 31, 2019		Consolidated Balance Sheet Location	December 31, 2019
Commodity contracts	Other current assets	$	0.3	Accrued expenses and other current liabilities	$	0.8
Commodity contracts	Other assets	0.1		Other noncurrent liabilities	0.2
Swap contracts	Other current assets	2.8		Accrued expenses and other current liabilities	—
Total derivatives designated as hedging instruments(a)(b)		$	3.2		$	1.0

(a)The Company has master netting agreements with its commodity hedge counterparties and accordingly has netted in its Consolidated Balance Sheets $0.4 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 swap contracts are receivable from both counterparties.

Schedule of other comprehensive income attributable to derivatives

The following tables present activity related to other comprehensive (loss) income before taxes for the years ended December 31, 2020 and 2019 (in millions):

		Year Ended December 31, 2020
Derivatives in Cash Flow Hedging Relationships	Location of Gain Reclassified from Accumulated OCI Into Income (Effective Portion)	Amount of Gain Recognized in OCI on Derivative (Effective Portion)		Amount of Gain Reclassified from Accumulated OCI Into Income (Effective Portion)
Commodity contracts	Product cost	$	(1.8)	$	1.0
Swap contracts	Interest expense	(3.9)		3.6
Total		$	(5.7)	$	4.6

		Year Ended December 31, 2019
Derivatives in Cash Flow Hedging Relationships	Location of Gain Reclassified from Accumulated OCI Into Income Effective Portion)	Amount of Gain Recognized in OCI on Derivative (Effective Portion)		Amount of Gain Reclassified from Accumulated OCI Into Income (Effective Portion)
Commodity contracts	Product cost	$	(0.8)	$	0.9
Swap contracts	Interest expense	(2.5)		2.2
Total		$	(3.3)	$	3.1

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STOCKHOLDERS' EQUITY AND EQUITY INSTRUMENTS (Tables)

12 Months Ended

Dec. 31, 2020

Equity [Abstract]

Schedule of weighted average assumptions and fair value for options granted

The weighted average assumptions and fair values for options granted for each of the years ended December 31 is included in the following table.

	2020			2019			2018
Fair value of options granted	$	10.91		$	9.15		$	8.77
Expected term (years)	4.8			4.5			4.5
Expected volatility	29.3		%	28.0		%	22.9		%
Dividend yield	3.5		%	4.1		%	3.6		%
Risk-free interest rates	1.6		%	2.3		%	2.5		%

Schedule of stock-based compensation activity

The following is a summary of the Company’s stock option, RSU and PSU activity and related information for the following periods:

	Stock Options			RSUs			PSUs
	Number	Weighted-average exercise price		Number	Weighted-average fair value		Number	Weighted-average fair value
Outstanding at December 31, 2017	562,877	$	75.89	70,856	$	74.63	112,036	$	79.48
Granted	250,514	59.61		42,013	60.28		67,235	64.30
Exercised(a)	—	—		—	—		—	—
Released from restriction(a)	—	—		(16,905)	88.78		(2,753)	78.92
Cancelled/Expired	(104,645)	71.65		(12,656)	66.53		(49,880)	85.51
Outstanding at December 31, 2018	708,746	$	70.76	83,308	$	65.75	126,638	$	69.06
Granted	369,716	54.15		218,071	49.73		123,003	56.88
Exercised(a)	—	—		—	—		—	—
Released from restriction(a)	—	—		(32,630)	66.95		—	—
Cancelled/Expired	(190,595)	69.06		(51,336)	54.87		(70,244)	67.20
Outstanding at December 31, 2019	887,867	$	64.21	217,413	$	52.07	179,397	$	61.43
Granted	94,945	58.91		95,276	58.24		107,072	74.73
Exercised(a)	(4,454)	57.02		—	—		—	—
Released from restriction(a)	—	—		(76,570)	50.03		(11,575)	78.87
Cancelled/Expired	(109,586)	69.00		(28,137)	51.85		(33,100)	68.18
Outstanding at December 31, 2020	868,772	$	63.06	207,982	$	55.68	241,794	$	65.57

(a)Common stock issued for exercised options, vested RSUs and vested and earned PSUs were issued from treasury shares.

Schedule of information about options outstanding and exercisable

The following table summarizes information about options outstanding and exercisable at December 31, 2020.

	Options Outstanding				Options Exercisable
Range of exercise prices	Options outstanding	Weighted-average remaining contractual life (years)	Weighted-average exercise price of options outstanding		Options exercisable	Weighted-average remaining contractual life (years)	Weighted-average exercise price of exercisable options
$53.75 - $54.38	252,245	5.3	$	53.75	84,082	5.3	$	53.75
$54.39 - $59.21	159,424	5.7	57.01		18,836	5.2	55.01
$59.22 - $63.75	159,445	4.3	59.50		110,700	4.3	59.50
$63.76 - $69.77	119,357	3.1	68.03		104,796	3.0	68.01
$69.78 - $91.75	178,301	1.3	81.51		178,301	1.3	81.51
Totals	868,772	4.1	$	63.06	496,715	3.1	$	68.05

Schedule of components of and changes in accumulated other comprehensive income (loss)

The components of and changes in accumulated other comprehensive loss (“AOCL”) for the years ended December 31, 2020 and 2019 are as follows (in millions):

Year Ended December 31, 2020(a)	Gains and (Losses) on Cash Flow Hedges		Defined Benefit Pension		Foreign Currency		Total
Beginning balance	$	(0.6)	$	(6.9)	$	(184.6)	$	(192.1)
Other comprehensive income (loss) before reclassifications	3.9		(3.2)		(109.5)		(108.8)
Amounts reclassified from accumulated other comprehensive loss	(3.1)		0.7		—		(2.4)
Net current period other comprehensive income (loss)	0.8		(2.5)		(109.5)		(111.2)
Ending balance	$	0.2	$	(9.4)	$	(294.1)	$	(303.3)

Year Ended December 31, 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	2.2		(2.7)		21.1		20.6
Amounts reclassified from accumulated other comprehensive loss	(2.1)		0.3		—		(1.8)
Net current period other comprehensive income (loss)	0.1		(2.4)		21.1		18.8
Ending balance	$	(0.6)	$	(6.9)	$	(184.6)	$	(192.1)

(a)With the exception of the cumulative foreign currency translation adjustment, for which no tax effect is recorded, the changes in the components of AOCL presented in the table are reflected net of applicable income taxes.

Schedule of changes in the components of accumulated other comprehensive gain (loss)

Year Ended December 31, 2020	Amount Reclassified from AOCL		Line Item Impacted in the Consolidated Statement of Operations
Losses on cash flow hedges:
Natural gas instruments	$	(1.0)	Product cost
Foreign currency contracts	(3.6)		Interest expense
Income tax expense	1.5
Reclassifications, net of income taxes	(3.1)
Amortization of defined benefit pension:
Amortization of loss	$	0.9	Product cost
Income tax benefit	(0.2)
Reclassifications, net of income taxes	0.7
Total reclassifications, net of income taxes	$	(2.4)

Year Ended December 31, 2019	Amount Reclassified from AOCL		Line Item Impacted in the Consolidated Statement of Operations
Gains (losses) on cash flow hedges:
Natural gas instruments	$	(0.9)	Product cost
Foreign currency contracts	(2.2)		Interest Expense
Income tax expense	1.0
Reclassifications, net of income taxes	(2.1)
Amortization of defined benefit pension:
Amortization of loss	$	0.4	Product cost
Income tax benefit	(0.1)
Reclassifications, net of income taxes	0.3
Total reclassifications, net of income taxes	$	(1.8)

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FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Dec. 31, 2020

Fair Value Disclosures [Abstract]

Schedule of estimated fair values for each type of instrument

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

	December 31, 2020		Level One		Level Two		Level Three
Asset Class:
Mutual fund investments in a non-qualified savings plan(a)	$	1.9	$	1.9	$	—	$	—
Derivatives – natural gas instruments, net	0.2		—		0.2		—
Derivatives - foreign currency contracts, net	2.6		—		2.6		—
Total Assets	$	4.7	$	1.9	$	2.8	$	—
Liability Class:
Liabilities related to non-qualified savings plan	$	(1.9)	$	(1.9)	$	—	$	—
Total Liabilities	$	(1.9)	$	(1.9)	$	—	$	—

(a)Includes mutual fund investments of approximately 30% in the common stock of large-cap U.S. companies, 10% in the common stock of small to mid-cap U.S. companies, 5% in the common stock of international companies, 15% in bond funds, 15% in short-term investments and 25% in blended funds.

	December 31, 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	2.8		—		2.8		—
Total Assets	$	4.2	$	1.4	$	2.8	$	—
Liability Class:
Liabilities related to non-qualified savings plan	$	(1.4)	$	(1.4)	$	—	$	—
Derivatives - natural gas instruments, net	(0.6)		—		(0.6)		—
Total Liabilities	$	(2.0)	$	(1.4)	$	(0.6)	$	—

(a)Includes mutual fund investments of approximately 30% 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, 10% in bond funds, 20% in short-term investments and 20% in blended funds.

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OPERATING SEGMENTS (Tables)

12 Months Ended

Dec. 31, 2020

Segment Reporting [Abstract]

Schedule of segment information

Segment information as of and for the years ended December 31, is as follows (in millions):

2020	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate& Other(a)		Total
Sales to external customers	$	779.4	$	239.6	$	344.4	$	10.1	$	1,373.5
Intersegment sales	—		5.4		0.3		(5.7)		—
Shipping and handling cost	217.8		34.0		14.8		—		266.6
Operating earnings (loss)	161.8		12.1		40.3		(73.7)		140.5
Depreciation, depletion and amortization	66.6		40.4		17.4		13.5		137.9
Total assets	1,020.8		520.8		579.2		141.6		2,262.4
Capital expenditures	56.8		12.5		9.6		6.0		84.9

2019	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate& Other(a)		Total
Sales to external customers	$	889.5	$	206.2	$	385.1	$	9.7	$	1,490.5
Intersegment sales	—		6.4		2.7		(9.1)		—
Shipping and handling cost	267.4		28.5		16.6		—		312.5
Operating earnings (loss)(b)	168.0		22.5		40.0		(66.9)		163.6
Depreciation, depletion and amortization	60.4		44.6		22.4		10.5		137.9
Total assets	1,056.3		575.5		715.3		96.1		2,443.2
Capital expenditures	65.9		15.2		10.5		6.5		98.1

2018	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate& Other(a)		Total
Sales to external customers	$	858.1	$	233.2	$	391.8	$	10.5	$	1,493.6
Intersegment sales	—		5.6		3.4		(9.0)		—
Shipping and handling cost	272.4		29.0		18.6		—		320.0
Operating earnings (loss)(b)	115.7		25.3		48.7		(59.4)		130.3
Depreciation, depletion and amortization	56.2		48.6		22.2		9.9		136.9
Total assets	948.9		589.3		709.9		119.8		2,367.9
Capital expenditures	58.7		20.7		10.1		7.3		96.8

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

Year Ended December 31, 2020	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate & Other(a)		Total
Highway Deicing Salt	$	473.8	$	—	$	—	$	—	$	473.8
Consumer & Industrial Salt	305.6		—		—		—		305.6
SOP and Specialty Plant Nutrients	—		245.0		272.8		—		517.8
Industrial Chemicals	—		—		71.9		—		71.9
Eliminations & Other	—		(5.4)		(0.3)		10.1		4.4
Sales to external customers	$	779.4	$	239.6	$	344.4	$	10.1	$	1,373.5

Year Ended December 31, 2019	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate & Other(a)		Total
Highway Deicing Salt	$	545.5	$	—	$	—	$	—	$	545.5
Consumer & Industrial Salt	344.0		—		—		—		344.0
SOP and Specialty Plant Nutrients	—		212.6		298.6		—		511.2
Industrial Chemicals	—		—		89.2		—		89.2
Eliminations & Other	—		(6.4)		(2.7)		9.7		0.6
Sales to external customers	$	889.5	$	206.2	$	385.1	$	9.7	$	1,490.5

Year Ended December 31, 2018	Salt		Plant Nutrition North America		Plant Nutrition South America		Corporate & Other(a)		Total
Highway Deicing Salt	$	532.0	$	—	$	—	$	—	$	532.0
Consumer & Industrial Salt	326.1		—		—		—		326.1
SOP and Specialty Plant Nutrients	—		238.8		300.2		—		539.0
Industrial Chemicals	—		—		95.0		—		95.0
Eliminations & Other	—		(5.6)		(3.4)		10.5		1.5
Sales to external customers	$	858.1	$	233.2	$	391.8	$	10.5	$	1,493.6

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

(b)In 2019, operating results included $2.8 million of additional logistics costs related to Mississippi River flooding and $2.3 million of severance and other costs related to executive transition. In 2018, corporate and other operating results included $5.1 million for executive transition costs.

Schedule of revenue from external customers and long-lived assets

Financial information relating to the Company’s operations by geographic area for the years ended December 31 is as follows (in millions):

Sales	2020		2019		2018
United States(a)	$	766.6	$	821.9	$	769.9
Canada	207.6		228.8		238.6
Brazil	336.6		375.2		381.8
United Kingdom	41.6		45.2		83.1
Other	21.1		19.4		20.2
Total sales	$	1,373.5	$	1,490.5	$	1,493.6

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

Financial information relating to the Company’s long-lived assets, excluding the investments related to the nonqualified retirement plan and pension plan assets, by geographic area as of December 31 (in millions):

Long-Lived Assets	2020		2019		2018
United States	$	532.9	$	561.5	$	551.6
Canada	514.0		522.8		497.4
United Kingdom	73.9		71.4		62.5
Brazil	376.0		493.1		524.8
Other	6.5		6.5		6.5
Total long-lived assets	$	1,503.3	$	1,655.3	$	1,642.8

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EARNINGS PER SHARE (Tables)

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

Schedule of earnings per 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):

Year ended December 31,	2020		2019		2018
Numerator:
Net earnings	$	59.5	$	62.5	$	68.8
Less: Net earnings allocated to participating securities(a)	(1.3)		(1.1)		(0.5)
Net earnings available to common stockholders	$	58.2	$	61.4	$	68.3
Denominator (in thousands):
Weighted average common shares outstanding, shares for basic earnings per share(b)	33,928		33,882		33,848
Weighted average equity awards outstanding	—		—		—
Shares for diluted earnings per share	33,928		33,882		33,848
Net earnings per common share, basic	$	1.72	$	1.82	$	2.02
Net earnings per common share, diluted	$	1.72	$	1.81	$	2.02

(a)Participating securities include PSUs and RSUs that receive non-forfeitable dividends. Net earnings were allocated to participating securities of 397,000, 307,000 and 186,000 for 2020, 2019 and 2018, respectively.

(b)For the calculation of diluted 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 1,188,000, 1,067,000 and 788,000 weighted options outstanding for 2020, 2019 and 2018, respectively, which were anti-dilutive and therefore not included in the diluted earnings per share calculation.

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QUARTERLY RESULTS (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2020

Quarterly Financial Information Disclosure [Abstract]

Schedule of quarterly information

Quarter	First		Second		Third		Fourth
2020
Sales	$	413.9	$	256.1	$	282.4	$	421.1
Gross profit	87.3		66.3		58.7		100.0
Net earnings (loss)(a)	27.6		1.7		(2.1)		32.3
Net earnings (loss) per share, basic(a)	0.80		0.04		(0.07)		0.94
Net earnings (loss) per share, diluted(a)	0.80		0.04		(0.07)		0.94
Basic weighted-average shares outstanding (in thousands)	33,892		33,915		33,947		33,958
Diluted weighted-average shares outstanding (in thousands)	33,892		33,915		33,947		33,977
2019
Sales	$	403.7	$	245.2	$	341.3	$	500.3
Gross profit	72.6		45.8		76.4		142.0
Net earnings (loss)(a)	7.6		(11.8)		10.6		56.1
Net earnings (loss) per share, basic(a)	0.22		(0.36)		0.31		1.64
Net earnings (loss) per share, diluted (a)	0.22		(0.36)		0.31		1.63
Basic weighted-average shares outstanding (in thousands)	33,874		33,883		33,884		33,886
Diluted weighted-average shares outstanding (in thousands)	33,874		33,883		33,884		33,886

(a)In the fourth quarter of 2020, the Company released a domestic tax reserve of $11.0 million. In the second quarter of 2019, the Company incurred $2.8 million ($2.1 million, net of tax) of additional logistics costs related to Mississippi River flooding. In the third quarter of 2019, the Company incurred $2.3 million ($1.7 million, net of tax) of severance and other costs related to executive transition.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Millions	6 Months Ended		12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2020 USD ($) extension_period	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Jan. 01, 2020 USD ($)	Jan. 01, 2019 USD ($)	Dec. 31, 2017 USD ($)
Finite-Lived Intangible Assets [Line Items]
Gain (loss) on foreign exchange of intercompany notes of long-term nature			$ (72.6)	$ (1.2)	$ (56.5)
Foreign currency exchange expense (income)			(0.4)	13.0	(5.8)
Value of receivables sold	$ 16.4	$ 32.7	22.1
Cash proceeds from sale of receivables	$ 15.6	30.4	$ 21.0
Sale of receivable, contingent liability (percent)	20.00%		20.00%
Receivables due of contingent consideration	$ 2.7		$ 4.1	2.7
Assets held-for-sale	7.2		6.8	7.2
Tax refund from settlement		(17.5)	(1.4)		(17.5)
Capitalized computer software costs	16.0		$ 13.4	16.0
Period of amortization of capitalized computer software costs			5 years
Amortization of capitalized computer software costs			$ 5.8	6.6	7.3
Impact of new accounting pronouncement	(529.6)	(540.2)	(387.0)	(529.6)	(540.2)			$ (694.6)
Inventories of spare parts related to long term assets	31.0		27.9	31.0
Operating lease assets	53.7		55.6	53.7
Investments in marketable securities relating to deferred compensation arrangement	1.4		1.9	1.4
Accounting Standards Update 2016-13
Finite-Lived Intangible Assets [Line Items]
Allowance for doubtful accounts			11.1			$ 9.4
Retained Earnings
Finite-Lived Intangible Assets [Line Items]
Impact of new accounting pronouncement	(607.4)	(643.5)	(567.3)	(607.4)	(643.5)			$ (672.5)
Cumulative effect of change in accounting principle
Finite-Lived Intangible Assets [Line Items]
Impact of new accounting pronouncement		0.1			0.1
Cumulative effect of change in accounting principle | Retained Earnings
Finite-Lived Intangible Assets [Line Items]
Impact of new accounting pronouncement		$ 0.1			$ 0.1	$ 0.1	$ (0.1)
U.S. taxing authorities
Finite-Lived Intangible Assets [Line Items]
Tax refund from settlement			0.9
Other current assets | Water rights
Finite-Lived Intangible Assets [Line Items]
Assets held-for-sale	5.2		5.2	5.2
Other current assets | U.S. taxing authorities
Finite-Lived Intangible Assets [Line Items]
Tax refund from settlement	58.3		$ 2.8	58.3
Cote Blanche
Finite-Lived Intangible Assets [Line Items]
Number of renewal periods (in extension periods) | extension_period			2
Lease renewal period			25 years
Leased Mineral Interests
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			90 years
Owned Mineral Properties
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			36 years
Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets			4 years
Minimum | Buildings and structures
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			10 years
Minimum | Typical maximum life leasehold and building improvements
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			5 years
Minimum | Land improvements
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			10 years
Minimum | Leasehold and building improvements
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			2 years
Minimum | Vehicles
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			2 years
Minimum | Machinery and Equipment - Other Mining and Production
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			2 years
Minimum | Office furniture and equipment
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			2 years
Minimum | Mineral interests
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			20 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets			50 years
Maximum | Buildings and structures
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			30 years
Maximum | Typical maximum life leasehold and building improvements
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			20 years
Maximum | Land improvements
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			25 years
Maximum | Leasehold and building improvements
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			40 years
Maximum | Vehicles
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			10 years
Maximum | Machinery and Equipment - Other Mining and Production
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			50 years
Maximum | Office furniture and equipment
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			10 years
Maximum | Mineral interests
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			99 years
Fermavi
Finite-Lived Intangible Assets [Line Items]
Ownership interest in investment			50.00%
Basis difference	$ 4.0		$ 2.0	$ 4.0

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REVENUES (Details)	12 Months Ended
	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Payment terms	30 days

XML

LEASES - Operating and Finance Leases by Balance Sheets Location (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
ASSETS
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssets	us-gaap:OtherAssets
Operating lease assets	$ 55.6	$ 53.7
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
Finance lease assets	$ 7.2	5.8
Total lease assets	$ 62.8	$ 59.5
Current liabilities:
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesCurrent	us-gaap:AccruedLiabilitiesCurrent
Operating	$ 14.8	$ 12.8
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesCurrent	us-gaap:AccruedLiabilitiesCurrent
Finance	$ 1.3	$ 1.1
Noncurrent liabilities:
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent	us-gaap:OtherLiabilitiesNoncurrent
Operating	$ 42.8	$ 41.0
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent	us-gaap:OtherLiabilitiesNoncurrent
Finance	$ 7.0	$ 6.2
Total lease liabilities	$ 65.9	$ 61.1

XML

LEASES - Operating and Finance Leases by Income Statement Location (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Amortization of lease assets	$ 1.8	$ 1.1
Interest on lease liabilities	0.6	0.6
Operating lease cost	17.4	19.2
Variable lease cost	11.7	18.8
Total lease cost	$ 31.5	$ 39.7

XML

LEASES - Schedule of Operating and Finance Lease Maturities (Details) $ in Millions	Dec. 31, 2020 USD ($)
Operating Leases
2021	$ 16.4
2022	13.1
2023	8.4
2024	5.7
2025	4.9
After 2025	18.0
Total lease payments	66.5
Less: Interest	(8.9)
Present value of lease liabilities	57.6
Finance Leases
2021	1.8
2022	1.2
2023	1.1
2024	0.9
2025	0.9
After 2025	6.1
Total lease payments	12.0
Less: Interest	(3.7)
Present value of lease liabilities	8.3
Total
2021	18.2
2022	14.3
2023	9.5
2024	6.6
2025	5.8
After 2025	24.1
Total lease payments	78.5
Less: Interest	(12.6)
Present value of lease liabilities	$ 65.9

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LEASES - Schedule of Lease Terms and Discount Rates (Details)	Dec. 31, 2020	Dec. 31, 2019
Weighted-average remaining lease term (years)
Operating leases	7 years	7 years 8 months 12 days
Finance leases	9 years 3 months 18 days	7 years 2 months 12 days
Weighted-average discount rate
Operating leases	3.70%	4.30%
Finance leases	7.30%	7.60%

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LEASES - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ 15.3	$ 18.9
Operating cash flows from finance leases	0.6	0.6
Financing cash flows from finance leases	1.8	1.3
Leased assets obtained in exchange for new operating lease liabilities	16.5	20.3
Leased assets obtained in exchange for new finance lease liabilities	$ 3.8	$ 0.2

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INVENTORIES (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2020	Dec. 31, 2020	Dec. 31, 2019
Inventory Disclosure [Abstract]
Finished goods		$ 287.4	$ 235.3
Raw materials and supplies		83.2	76.2
Total inventories		$ 370.6	$ 311.5
Inventory Write-down	$ 7.4

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PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property plant and equipment, before accumulated depreciation	$ 1,996.3	$ 1,971.0
Less accumulated depreciation and depletion	(1,031.4)	(940.2)
Property, plant and equipment, net	964.9	1,030.8
Property plant and equipment under finance leases	11.2	9.2
Property plant and equipment under finance leases, accumulated depreciation	4.0	3.4
Land, buildings and structures and leasehold improvements
Property, Plant and Equipment [Line Items]
Property plant and equipment, before accumulated depreciation	626.8	596.0
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property plant and equipment, before accumulated depreciation	1,085.1	1,001.9
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Property plant and equipment, before accumulated depreciation	53.3	60.7
Mineral interests
Property, Plant and Equipment [Line Items]
Property plant and equipment, before accumulated depreciation	172.4	171.1
Construction in progress
Property, Plant and Equipment [Line Items]
Property plant and equipment, before accumulated depreciation	$ 58.7	$ 141.3

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GOODWILL AND OTHER INTANGIBLE ASSETS (Schedule of Finite-Lived Intangible Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross intangible asset	$ 140.2	$ 153.5
Accumulated amortization	(73.5)	(68.8)
Net intangible assets	66.7	84.7
Supply Agreement
Finite-Lived Intangible Assets [Line Items]
Gross intangible asset	28.5	27.9
Accumulated amortization	(5.7)	(5.0)
Net intangible assets	22.8	22.9
SOP Production Rights
Finite-Lived Intangible Assets [Line Items]
Gross intangible asset	24.3	24.3
Accumulated amortization	(16.6)	(15.6)
Net intangible assets	7.7	8.7
Customer/Distributor Relationships
Finite-Lived Intangible Assets [Line Items]
Gross intangible asset	11.6	12.7
Accumulated amortization	(6.8)	(6.1)
Net intangible assets	4.8	6.6
Lease Rights
Finite-Lived Intangible Assets [Line Items]
Gross intangible asset	1.8	1.7
Accumulated amortization	(0.6)	(0.5)
Net intangible assets	1.2	1.2
Trade Names
Finite-Lived Intangible Assets [Line Items]
Gross intangible asset	30.3	36.8
Accumulated amortization	(11.8)	(10.9)
Net intangible assets	18.5	25.9
Developed Technologies
Finite-Lived Intangible Assets [Line Items]
Gross intangible asset	26.2	32.8
Accumulated amortization	(21.4)	(21.7)
Net intangible assets	4.8	11.1
Patents
Finite-Lived Intangible Assets [Line Items]
Gross intangible asset	16.2	16.0
Accumulated amortization	(9.6)	(8.1)
Net intangible assets	6.6	7.9
Other
Finite-Lived Intangible Assets [Line Items]
Gross intangible asset	1.3	1.3
Accumulated amortization	(1.0)	(0.9)
Net intangible assets	$ 0.3	$ 0.4

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GOODWILL AND OTHER INTANGIBLE ASSETS (Schedule of Estimated Useful Life) (Details)	12 Months Ended
	Dec. 31, 2020
Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	4 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	50 years
Supply Agreement
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	50 years
SOP Production Rights
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	25 years
Patents | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	10 years
Patents | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	20 years
Developed Technologies | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	4 years
Developed Technologies | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	7 years
Lease Rights
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	25 years
Customer/Distributor Relationships | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	10 years
Customer/Distributor Relationships | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	14 years
Trademarks
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	10 years
Trade Names | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	10 years
Trade Names | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	11 years

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GOODWILL AND OTHER INTANGIBLE ASSETS (Additional Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortization expense	$ 10.7	$ 13.6	$ 15.0
Projected amortization expense over the next 5 years [Abstract]
Projected amortization expense, minimum	5.0
Projected amortization expense, maximum	$ 10.0
Remaining amortization period	5 years
Weighted-Average Amortization Period (in years)	20 years
Goodwill	$ 281.3	343.0
Plant Nutrition North America
Projected amortization expense over the next 5 years [Abstract]
Goodwill	56.4	55.4
Plant Nutrition South America
Projected amortization expense over the next 5 years [Abstract]
Goodwill	218.8	281.6
Water rights
Projected amortization expense over the next 5 years [Abstract]
Indefinite-lived intangible assets	17.7	17.7
Trade Names
Projected amortization expense over the next 5 years [Abstract]
Indefinite-lived intangible assets	$ 0.6	$ 0.6

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INCOME TAXES (Tax Cuts and Jobs Act) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Loss Carryforwards [Line Items]
Tax cuts and jobs act of 2017, provisional income tax expense (benefit)				$ 46.8
Tax cuts and jobs act of 2017, one-time tax on unremitted foreign earnings				55.2
Tax cuts and jobs act of 2017, deferred tax liabilities			$ 0.1	$ 8.4
Tax cuts and jobs acts of 2017, tax benefit			3.0
Tax cuts and jobs act of 2017, tax benefit related to unremitted foreign earnings			(3.1)
Repatriation of foreign earnings			150.0
Tax on repatriated amounts	$ 0.0	$ 0.9	3.4
State and local jurisdiction
Operating Loss Carryforwards [Line Items]
Tax on repatriated amounts			$ 4.3

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INCOME TAXES (Income Tax Provision (Benefit)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal	$ (22.3)	$ 5.3	$ 8.1
State	0.4	2.0	4.3
Foreign	28.2	26.6	13.1
Total current	6.3	33.9	25.5
Deferred:
Federal	1.2	(7.2)	(8.6)
State	(1.2)	(1.9)	(0.5)
Foreign	5.4	(2.7)	(7.6)
Total deferred	5.4	(11.8)	(16.7)
Total provision for income taxes	$ 11.7	$ 22.1	$ 8.8

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INCOME TAXES (Components of Earnings Before Taxes and Tax Effect) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
U.S. (loss) income	$ (4.1)	$ 31.7	$ (80.6)
Foreign income	75.3	52.9	158.2
Earnings before income taxes	$ 71.2	$ 84.6	$ 77.6
U.S. federal statutory rate	21.00%	21.00%	21.00%
Computed tax at the U.S. federal statutory rate of 21%	$ 15.0	$ 17.8	$ 16.3
Foreign income rate differential, mining, and withholding taxes, net of U.S. federal deduction	9.3	10.2	0.9
Percentage depletion in excess of basis	(4.4)	(5.8)	(4.7)
Other domestic tax reserves, net of reversals	(9.7)	0.2	1.5
State income taxes, net of federal income tax benefit	(0.9)	0.0	2.1
Change in valuation allowance on deferred tax asset	2.4	0.2	(5.7)
Interest expense recognition differences	(3.5)	(3.5)	(3.6)
GILTI	3.8	1.0	1.0
Tax Cuts and Jobs Act of 2017	0.0	1.6	(3.0)
Tax on repatriated amounts	0.0	0.9	3.4
Transfer pricing settlement with taxing authorities	0.0	0.0	2.2
Other, net	(0.3)	(0.5)	(1.6)
Total provision for income taxes	$ 11.7	$ 22.1	$ 8.8
Effective tax rate	16.00%	26.00%	11.00%

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INCOME TAXES (Components of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Valuation allowance	$ (43.4)	$ (41.2)
Net noncurrent deferred tax assets	11.6	13.7
Deferred tax liabilities:
Property, plant and equipment	66.5	63.7
Intangible asset	22.2	29.1
Right of use lease asset	1.9	0.9
Total deferred tax liabilities	90.6	93.7
Net deferred tax liabilities	87.5	89.9
Deferred tax asset, not to be netted
Deferred tax assets:
Excess interest expense	9.9	14.9
Foreign tax credit	39.4	38.1
Right of use lease liability	11.3	11.1
Stock-based compensation	2.0	2.3
Other, net	20.5	16.5
Total deferred tax assets before valuation allowance	83.5	86.8
Valuation allowance	(42.0)	(39.8)
Total deferred tax assets	41.5	47.0
Deferred tax asset, not to be netted | Subsidiaries | Reluz Nordeste Industria E Comercio Ltda
Deferred tax assets:
Net operating loss carryforwards, foreign	0.4	0.6
Deferred tax asset, not to be netted | Subsidiaries | Compass Minerals South America
Deferred tax assets:
Net operating loss carryforwards, foreign	0.0	3.3
Deferred tax liabilities, to be netted
Deferred tax assets:
Total deferred tax liabilities to be netted with deferred tax assets	29.9	33.3
Deferred tax liabilities:
Property, plant and equipment	17.2	21.2
Right of use lease asset	11.3	11.1
Other, net	1.4	1.0
Deferred tax assets, to be netted
Deferred tax assets:
Right of use lease liability	1.9	0.9
Other, net	0.9	2.1
Net operating loss carryforwards	1.7	2.2
Total deferred tax assets before valuation allowance	4.5	5.2
Valuation allowance	(1.4)	(1.4)
Total deferred tax assets	$ 3.1	$ 3.8

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INCOME TAXES (Additional Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2018	Dec. 31, 2019
Operating Loss Carryforwards [Line Items]
Decrease in valuation allowance		$ 7.2
Valuation allowance	$ 43.4		$ 41.2
Unrecognized tax benefits that would impact effective tax rate	28.8
Reductions related to release of uncertain tax positions due to expiration of statutes of limitations	11.0
Foreign tax authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	7.7		18.8
Foreign country with expiration of 2033
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	0.1		1.7
State and local jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	0.2		$ 0.3
Resolution with various taxing authorities
Operating Loss Carryforwards [Line Items]
Amount of tax benefit decrease management believes is reasonably possible	$ 1.1

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INCOME TAXES (Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Unrecognized tax benefits [Roll forward]
Balance at January 1	$ 47.4	$ 50.9	$ 67.4
Additions resulting from current year tax positions	0.0	0.2	8.0
Additions relating to tax positions taken in prior years	1.4	4.5	2.6
Reductions due to settlements	0.0	0.0	(25.0)
Reductions due to cash payments	0.0	(7.5)	0.0
Reductions relating to tax positions taken in prior years	(0.1)	(0.4)	(0.3)
Reductions due to expiration of tax years	(10.4)	(0.3)	(1.8)
Balance at December 31	$ 38.3	$ 47.4	$ 50.9

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INCOME TAXES (Foreign Subsidiaries) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Contingency [Line Items]
Accrued interest and penalties, net of reversals	$ 2.0	$ 4.6	$ (2.1)
Interest and penalties	22.3	20.3
Repatriation of foreign earnings			150.0
Tax on repatriated amounts	0.0	$ 0.9	3.4
Outside basis difference	213.6
Canadian Provincial
Income Tax Contingency [Line Items]
Total reassessment amount including interest	153.4
Amount of security posted in the form of a performance bond	120.1
Amount of security posted in the form of cash	$ 39.0
State and local jurisdiction
Income Tax Contingency [Line Items]
Tax on repatriated amounts			$ 4.3

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INCOME TAXES (Settlements) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Contingency [Line Items]
Tax settlement			$ 5.3
Increase In sales					$ 85.7
Intercompany payments related to income tax settlement			106.1	$ 85.7
Liability (refund) adjustment for settlement		$ 1.4		17.5
Tax Year 2007 Through 2008
Income Tax Contingency [Line Items]
Tax, penalties, and interest		34.2
Canadian and Provincial
Income Tax Contingency [Line Items]
Increase In sales				$ 106.1
Canadian and Provincial | Tax Year 2007 Through 2016
Income Tax Contingency [Line Items]
Tax settlement					$ 13.8
U.S. taxing authorities
Income Tax Contingency [Line Items]
Liability (refund) adjustment for settlement		(0.9)
Tax refund received			22.2
U.S. taxing authorities | Tax Year 2013 Through 2021
Income Tax Contingency [Line Items]
Tax refund received		$ 59.7
Foreign tax authority
Income Tax Contingency [Line Items]
Liability (refund) adjustment for settlement			$ 29.9
Forecast
Income Tax Contingency [Line Items]
Tax settlement	$ 1.4
Forecast | U.S. taxing authorities | Tax Year 2013 Through 2021
Income Tax Contingency [Line Items]
Liability (refund) adjustment for settlement	$ 1.9

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PENSION PLANS AND OTHER BENEFITS (Additional Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Amounts recognized in accumulated other comprehensive income, net of tax [Abstract]
Actuarial net losses recognized in accumulated other comprehensive income, net of tax	$ 9.4	$ 6.8
Accumulated other comprehensive income (loss) before adjustment of prior service costs	10.4	7.9
Accumulated other comprehensive (income) loss related to prior service cost net of tax	1.0	1.1
Other comprehensive income (loss) related to actuarial gains (losses), net of tax	(2.9)	(2.4)	$ (1.2)
Other comprehensive income (loss) related to amortization of loss, net of tax	0.8	0.4	0.3
Other comprehensive (income) loss related to prior service cost, net of tax	(0.1)	(0.1)	(0.1)
Other comprehensive income (loss) related to foreign exchange	(0.3)	(0.3)	0.4
Expected losses to be recognized in net periodic benefit costs in next fiscal year	1.4
Expected amortization of losses in next fiscal year	1.5
Expected amortization of prior service cost in next fiscal year	0.1
Net periodic (benefit) cost expected in next fiscal year	0.1
Amounts recognized in balance sheet [Abstract]
Underfunded plan status recorded in noncurrent assets	1.2
Noncurrent asset (liability)	(1.2)	1.5
Defined benefit pension plan	$ 73.3	64.1	58.6
Period of amortization of pension benefit obligations	5 years
Expense attributable to all Savings Plans	$ 12.5	11.6	$ 12.6
Investments in marketable securities relating to deferred compensation arrangement	$ 1.9	$ 1.4
Equity funds
Defined Benefit Plan Disclosure [Line Items]
Target allocation	75.00%
Bond funds
Defined Benefit Plan Disclosure [Line Items]
Target allocation	25.00%

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PENSION PLANS AND OTHER BENEFITS (Weighted-Average Asset Allocations and Fair Value of Plan Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocation	100.00%	100.00%
Fair value of pension plan assets [Abstract]
Total pension assets	$ 72.1	$ 65.6	$ 60.7
Level One
Fair value of pension plan assets [Abstract]
Total pension assets	1.3	1.9
Level Two
Fair value of pension plan assets [Abstract]
Total pension assets	70.8	63.7
Level Three
Fair value of pension plan assets [Abstract]
Total pension assets	$ 0.0	$ 0.0
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocation	2.00%	3.00%
Fair value of pension plan assets [Abstract]
Total pension assets	$ 1.3	$ 1.9
Cash and cash equivalents | Level One
Fair value of pension plan assets [Abstract]
Total pension assets	1.3	1.9
Cash and cash equivalents | Level Two
Fair value of pension plan assets [Abstract]
Total pension assets	0.0	0.0
Cash and cash equivalents | Level Three
Fair value of pension plan assets [Abstract]
Total pension assets	$ 0.0	$ 0.0
Blended funds
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocation	48.00%	51.00%
Fair value of pension plan assets [Abstract]
Total pension assets	$ 34.9	$ 33.6
Blended funds | Level One
Fair value of pension plan assets [Abstract]
Total pension assets	0.0	0.0
Blended funds | Level Two
Fair value of pension plan assets [Abstract]
Total pension assets	34.9	33.6
Blended funds | Level Three
Fair value of pension plan assets [Abstract]
Total pension assets	$ 0.0	$ 0.0
Bond funds
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocation	50.00%	46.00%
Treasuries
Fair value of pension plan assets [Abstract]
Total pension assets	$ 35.9	$ 30.1
Treasuries | Level One
Fair value of pension plan assets [Abstract]
Total pension assets	0.0	0.0
Treasuries | Level Two
Fair value of pension plan assets [Abstract]
Total pension assets	35.9	30.1
Treasuries | Level Three
Fair value of pension plan assets [Abstract]
Total pension assets	$ 0.0	$ 0.0

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PENSION PLANS AND OTHER BENEFITS (Summary of Assumptions Used in Calculating Net Periodic Benefit Costs) (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Assumptions used in calculating net periodic benefit cost [Abstract]
Discount rate	1.20%	2.00%	2.90%
Expected return on plan assets	3.10%	3.10%	3.70%

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PENSION PLANS AND OTHER BENEFITS (Summary of Future Expected Benefit Payments) (Details) $ in Millions	Dec. 31, 2020 USD ($)
Future expected benefit payments [Abstract]
2021	$ 3.2
2022	3.2
2023	3.3
2024	3.4
2025	3.4
2026-2030	$ 18.4

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PENSION PLANS AND OTHER BENEFITS (Summary of Changes in Benefit Obligation and Plan Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Change in benefit obligation:
Benefit obligation as of January 1	$ 64.1	$ 58.6
Interest cost	1.2	1.7	$ 1.6
Actuarial loss	8.3	4.8
Plan amendment	0.1	0.0	0.0
Benefits paid	(2.9)	(3.5)
Currency fluctuation adjustment	2.5	2.5
Benefit obligation as of December 31	73.3	64.1	58.6
Change in plan assets:
Beginning balance	65.6	60.7
Actual return	6.7	4.2
Company contributions	0.4	1.7
Currency fluctuation adjustment	2.3	2.5
Benefits paid	(2.9)	(3.5)
Ending balance	72.1	65.6	$ 60.7
(Underfunded) Overfunded status of the plan	$ (1.2)	$ 1.5

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PENSION PLANS AND OTHER BENEFITS (Summary of Components of Net Pension Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Components of net pension expense [Abstract]
Interest cost on projected benefit obligation	$ 1.2	$ 1.7	$ 1.6
Prior service cost	(0.1)	(0.1)	(0.1)
Expected return on plan assets	(1.9)	(2.2)	(2.5)
Plan amendment	0.1	0.0	0.0
Net amortization	1.0	0.5	0.3
Net periodic pension cost (benefit)	$ 0.3	$ (0.1)	$ (0.7)

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LONG TERM DEBT (Summary of Long-Term Debt) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Total debt, gross	$ 1,414.3	$ 1,430.8
Less unamortized debt issuance costs	(12.9)	(14.8)
Total debt	1,401.4	1,416.0
Less current portion	(63.7)	(52.1)
Long-term debt	$ 1,337.7	1,363.9
4.875% Senior Notes due July 2024
Debt Instrument [Line Items]
Stated interest rate (as a percent)	4.875%
Total debt, gross	$ 250.0	250.0
Term Loan due January 2025
Debt Instrument [Line Items]
Total debt, gross	390.0	400.0
Revolving Credit Facility due January 2025 | Revolving Credit Facility due January 2025
Debt Instrument [Line Items]
Total debt, gross	$ 130.3	160.0
6.75% Senior Notes due December 2027
Debt Instrument [Line Items]
Stated interest rate (as a percent)	6.75%
Total debt, gross	$ 500.0	500.0
3.7% Banco Itaú loan due March 2020
Debt Instrument [Line Items]
Stated interest rate (as a percent)	3.70%
Total debt, gross	$ 0.0	15.4
AR Securitization Facility expires June 2023
Debt Instrument [Line Items]
Total debt, gross	51.2	0.0
Banco Santander loan due October 2020
Debt Instrument [Line Items]
Total debt, gross	0.0	16.2
Banco Itaú loan due February 2021
Debt Instrument [Line Items]
Total debt, gross	10.4	0.0
Banco Rabobank loan due July 2021
Debt Instrument [Line Items]
Total debt, gross	6.8	17.4
Banco BTG loan due July 2021
Debt Instrument [Line Items]
Total debt, gross	2.6	0.0
Banco Santander loan due September 2021
Debt Instrument [Line Items]
Total debt, gross	0.0	19.9
Banco do Brasil loan due September 2021
Debt Instrument [Line Items]
Total debt, gross	9.6	12.4
Banco Rabobank loan due September 2021
Debt Instrument [Line Items]
Total debt, gross	6.8	0.0
Banco BTG loan due October 2021
Debt Instrument [Line Items]
Total debt, gross	2.6	0.0
Banco Rabobank loan due November 2021
Debt Instrument [Line Items]
Total debt, gross	13.5	17.4
Banco Santander loan due December 2021
Debt Instrument [Line Items]
Total debt, gross	0.0	14.9
Banco BTG loan due January 2022
Debt Instrument [Line Items]
Total debt, gross	1.0	0.0
Banco Votorantim loan due February 2022
Debt Instrument [Line Items]
Total debt, gross	7.7	0.0
Banco Bradesco loan due February 2022
Debt Instrument [Line Items]
Total debt, gross	4.8	0.0
Banco Santander loan due March 2022
Debt Instrument [Line Items]
Total debt, gross	2.9	0.0
Banco BTG loan due April 2022
Debt Instrument [Line Items]
Total debt, gross	1.0	0.0
Banco BTG loan due July 2022
Debt Instrument [Line Items]
Total debt, gross	2.6	0.0
Banco Safra loan due October 2022
Debt Instrument [Line Items]
Total debt, gross	3.9	0.0
Banco Santander loan due October 2022
Debt Instrument [Line Items]
Total debt, gross	12.5	0.0
Financiadora de Estudos e Projetos loan due November 2023
Debt Instrument [Line Items]
Total debt, gross	$ 4.1	$ 7.2

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LONG TERM DEBT (Additional Information) (Details)			1 Months Ended		3 Months Ended					12 Months Ended
	Jun. 30, 2020 USD ($)	Oct. 31, 2019	Nov. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2020 USD ($) loan	Sep. 30, 2020 USD ($) loan	Mar. 31, 2020 USD ($) loan	Dec. 31, 2019 USD ($) loan	Mar. 31, 2019 USD ($) loan	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2019 USD ($)
Debt Instrument [Line Items]
Debt outstanding					$ 1,414,300,000			$ 1,430,800,000		$ 1,414,300,000	$ 1,430,800,000
Expense as result of amendment										3,200,000	2,800,000	$ 2,200,000
Repayments of debt						$ 15,400,000				$ 79,200,000	902,800,000	68,100,000
Short-term debt refinanced								17,400,000
Unallocated Financing Receivables | Account Receivable Financing Receivable
Debt Instrument [Line Items]
Financing receivable, term	3 years
Revolving accounts receivable financing facility	$ 100,000,000.0
2019 Credit Agreement
Debt Instrument [Line Items]
Weighted average interest rate on all borrowings outstanding					2.20%					2.20%
Fees paid as a result of amendment			$ 4,100,000
Capitalized deferred financing costs as result of amendment			3,800,000
Expense as result of amendment			300,000
Write off of previously capitalized deferred financing costs			300,000
Term Loan due January 2025
Debt Instrument [Line Items]
Debt outstanding					$ 390,000,000.0			400,000,000.0		$ 390,000,000.0	400,000,000.0
Compass Minerals South America Loan Mature from March 2020 through November 2023
Debt Instrument [Line Items]
Face amount					92,800,000					92,800,000
Brazilian Reais-denominated Loans
Debt Instrument [Line Items]
Face amount					$ 21,200,000	$ 15,100,000	$ 20,000,000.0	$ 27,300,000	$ 18,000,000.0	$ 21,200,000	$ 27,300,000		$ 36,000,000.0
Number of loans | loan					3	6	3	2	2
Number of loans denominated in foreign currency | loan							2
Brazilian Reais-denominated Loans | Certificado De Deposito Interbancario (CDI) | Minimum
Debt Instrument [Line Items]
Variable rate, percentage of reference rate					171.00%	200.00%	143.00%			171.00%
Brazilian Reais-denominated Loans | Certificado De Deposito Interbancario (CDI) | Maximum
Debt Instrument [Line Items]
Variable rate, percentage of reference rate					186.00%	204.00%	150.00%			186.00%
Euro-Denominated Loans
Debt Instrument [Line Items]
Number of loans denominated in foreign currency | loan							1
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 September 2021, one | Certificado De Deposito Interbancario (CDI)
Debt Instrument [Line Items]
Variable rate, percentage of reference rate													141.00%
Brazilian Reais-denominated Loans Mature September 2021, two | Certificado De Deposito Interbancario (CDI)
Debt Instrument [Line Items]
Variable rate, percentage of reference rate								126.00%			126.00%
Brazilian Reais-denominated Loans Mature December 2021 | Certificado De Deposito Interbancario (CDI)
Debt Instrument [Line Items]
Variable rate, percentage of reference rate								129.00%			129.00%
Brazilian Reais-Denominated Loans Mature November 2021 | Certificado De Deposito Interbancario (CDI)
Debt Instrument [Line Items]
Variable rate, percentage of reference rate								122.00%			122.00%
Revolving Credit Facility due January 2025 | Revolving Credit Facility due January 2025
Debt Instrument [Line Items]
Debt outstanding					$ 130,300,000			$ 160,000,000.0		$ 130,300,000	$ 160,000,000.0
Revolving Credit Facility due January 2025 | Revolving Credit Facility Due July 2021
Debt Instrument [Line Items]
Fees paid as a result of amendment				$ 1,400,000
Capitalized deferred financing costs as result of amendment				1,400,000								$ 1,400,000
Expense as result of amendment				$ 100,000
Secured debt | Base Rate
Debt Instrument [Line Items]
Interest spread over base rate		0.50%
Secured debt | Term Loan due January 2025
Debt Instrument [Line Items]
Face amount			$ 400,000,000
Principal payments as a percentage, years one and two			2.50%
Principal payments as a percentage, years three through five			5.00%
Line of credit | Revolving Credit Facility due January 2025 | Revolving Credit Facility due January 2025
Debt Instrument [Line Items]
Long-term debt, revolving credit facility			$ 300,000,000
Amount of facility that may be drawn in Canadian dollars					40,000,000					40,000,000
Amount of facility that may be drawn in British pounds sterling					10,000,000					10,000,000
Remaining borrowing capacity					157,200,000					157,200,000
Line of credit | Letter of credit | Revolving Credit Facility due January 2025
Debt Instrument [Line Items]
Long-term debt, revolving credit facility					50,000,000					50,000,000
Outstanding letters of credit					$ 12,500,000					$ 12,500,000
Senior notes | Senior Notes due 2027
Debt Instrument [Line Items]
Face amount			500,000,000
Capitalized deferred financing costs as result of amendment			$ 8,200,000
Stated interest rate (as a percent)			6.75%		6.75%					6.75%
Senior notes | Senior Notes July 2024
Debt Instrument [Line Items]
Stated interest rate (as a percent)					4.875%					4.875%

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LONG TERM DEBT (Future Maturities of Long-Term Debt) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Future maturities of long-term debt [Abstract]
2021	$ 63.7
2022	57.8
2023	72.5
2024	270.0
2025	450.3
Thereafter	500.0
Total	$ 1,414.3	$ 1,430.8

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DERIVATIVE FINANCIAL INSTRUMENTS (Additional Information) (Details) MMBTU in Millions, $ in Millions	1 Months Ended	12 Months Ended
	Apr. 30, 2020 USD ($)	Dec. 31, 2020 USD ($) MMBTU	Dec. 31, 2019 USD ($) MMBTU	Dec. 31, 2018 USD ($)	Mar. 31, 2020 USD ($)	Feb. 28, 2018 USD ($)
Derivatives, Fair Value [Line Items]
Period hedging portion of natural gas usage considered in advance of purchase		36 months
Forward Contracts
Derivatives, Fair Value [Line Items]
Notional amount			$ 11.9
Derivatives designated as hedging instruments | Commodity contracts
Derivatives, Fair Value [Line Items]
Percent of forecasted usage to be hedged		90.00%
Notional amount (in MMBtus) | MMBTU		2.5	2.8
Net gain (loss) to be reclassified from accumulated other comprehensive income to earnings during the next 12 months		$ 0.3
Derivatives designated as hedging instruments | Swap contracts
Derivatives, Fair Value [Line Items]
Notional amount		10.5	$ 15.7
Gain (loss) expected to be reclassified during the next twelve months		$ 2.6
Derivatives not designated as hedging instruments | Derivatives - foreign currency contracts, net
Derivatives, Fair Value [Line Items]
Net gain (loss) to be reclassified from accumulated other comprehensive income to earnings during the next 12 months			$ 1.5
Notional amount					$ 89.9	$ 19.9
Gain (loss) on foreign exchange, not designated as hedges	$ 3.1
Derivatives not designated as hedging instruments | Forward Contracts
Derivatives, Fair Value [Line Items]
Net gain (loss) to be reclassified from accumulated other comprehensive income to earnings during the next 12 months				$ (1.0)

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DERIVATIVE FINANCIAL INSTRUMENTS (Fair Value of Hedged Items) (Details) $ in Millions	Dec. 31, 2020 USD ($) counterparty	Dec. 31, 2019 USD ($) counterparty
Derivatives, Fair Value [Line Items]
Number of counterparties (in counterparties) | counterparty		2
Commodity contracts
Derivatives, Fair Value [Line Items]
Netting of contracts in a receivable position against contracts in payable position	$ 0.3	$ 0.4
Number of counterparties (in counterparties) | counterparty	2
Swap contracts
Derivatives, Fair Value [Line Items]
Number of counterparties (in counterparties) | counterparty	1
Derivatives designated as hedging instruments
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 3.1	3.2
Liability Derivatives	0.3	1.0
Derivatives designated as hedging instruments | Commodity contracts | Other current assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	0.4	0.3
Derivatives designated as hedging instruments | Commodity contracts | Accrued expenses and other current liabilities
Derivatives, Fair Value [Line Items]
Liability Derivatives	0.1	0.8
Derivatives designated as hedging instruments | Commodity contracts | Other assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	0.1	0.1
Derivatives designated as hedging instruments | Commodity contracts | Other noncurrent liabilities
Derivatives, Fair Value [Line Items]
Liability Derivatives	0.2	0.2
Derivatives designated as hedging instruments | Swap contracts | Other current assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	2.6	2.8
Derivatives designated as hedging instruments | Swap contracts | Accrued expenses and other current liabilities
Derivatives, Fair Value [Line Items]
Liability Derivatives	$ 0.0	$ 0.0

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DERIVATIVE FINANCIAL INSTRUMENTS (Activity Related to Other Comprehensive Income) (Details) - Derivatives in Cash Flow Hedging Relationships - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Recognized in OCI on Derivative (Effective Portion)	$ (5.7)	$ (3.3)
Amount of Gain Reclassified from Accumulated OCI Into Income (Effective Portion)	4.6	3.1
Commodity contracts | Product cost
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Recognized in OCI on Derivative (Effective Portion)	(1.8)	(0.8)
Amount of Gain Reclassified from Accumulated OCI Into Income (Effective Portion)	1.0	0.9
Swap contracts | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Recognized in OCI on Derivative (Effective Portion)	(3.9)	(2.5)
Amount of Gain Reclassified from Accumulated OCI Into Income (Effective Portion)	$ 3.6	$ 2.2

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COMMITMENTS AND CONTINGENCIES (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) agreement	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Loss Contingencies [Line Items]
Maximum exposure for other labor matters	$ 16.0	$ 25.0
Unions [Abstract]
Percentage of company's global workforce represented by labor unions	30.00%
Number of collective bargaining agreements (in agreements) | agreement	12
Number of collective bargaining agreements expiring in 2021 (in agreements) | agreement	2
Number of collective bargaining agreements expiring March 31, 2021 (in agreements) | agreement	1
Number of collective bargaining agreements expiring in 2022 (in agreements) | agreement	5
Number of collective bargaining agreements expiring in 2023 (in agreements) | agreement	3
Number of collective bargaining agreements expiring in 2027 (in agreements) | agreement	1
Royalties [Abstract]
Royalty expense	$ 18.3	16.3	$ 14.8
Sales contracts [Abstract]
Guarantor obligations, performance bonds outstanding	51.4
Purchase commitments [Abstract]
Purchase commitments for 2021	43.6
Purchase commitments for 2022	13.3
Purchase commitments for 2023	10.0
Purchase commitments for 2024	7.8
Purchase commitments for 2025	2.1
Purchase commitments, after 2025	$ 7.5
U.S., Canada, and U.K.
Unions [Abstract]
Percentage of company's global workforce represented by labor unions	50.00%
Workforce subject to collective bargaining arrangements | Labor force concentration risk | Brazil
Unions [Abstract]
Percentage of concentration risk	40.00%
Compass Minerals South America
Loss Contingencies [Line Items]
Contingent liabilities assumed	$ 3.5	5.6
Brazilian Tax Litigation And Assessments
Loss Contingencies [Line Items]
Possible tax proceedings and claims	$ 7.9	$ 15.8

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STOCKHOLDERS' EQUITY AND EQUITY INSTRUMENTS (Summary of Plan Information) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	May 31, 2020	May 31, 2015	Dec. 31, 2005
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends paid (in dollars per share)	$ 2.88	$ 2.88	$ 2.88
Preferred stock, shares authorized (in shares)	10,000,000
Preferred stock, shares issued (in shares)	0
Preferred stock, shares Outstanding (in shares)	0
Series A preferred stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares designated as series A junior participating preferred stock (in shares)	200,000
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period	4 years
Award expiration period	7 years
Number of shares available from conversion (in shares)	1
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available from conversion (in shares)	1
TSR PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period of PSUs	3 years	3 years
EBITDA Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period of PSUs		2 years
2005 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized shares (in shares)						3,240,000
2015 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized shares (in shares)					3,000,000
2020 Incentive Award Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized shares (in shares)				2,977,933
Deferred compensation agreement
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred stock units credited in period (in shares)	42,313	33,883	26,291
Deferred compensation agreement | Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reissued from treasury stock (in shares)	8,525	9,041	6,728
Deferred compensation agreement | Director | RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units granted to directors (in shares)	3,750
Minimum | RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period	1 year
Minimum | TSR PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares earned	0.00%
Minimum | Target Number Of Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares earned	0.00%
Minimum | EBITDA Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares earned	0.00%
Maximum | RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period	3 years
Maximum | TSR PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares earned	150.00%
Maximum | Target Number Of Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares earned	200.00%
Maximum | EBITDA Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares earned	200.00%

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STOCKHOLDERS' EQUITY AND EQUITY INSTRUMENTS (Summary of Fair Value Assumptions and Methodology) (Details) - Stock options - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of options granted (in dollars per share)	$ 10.91	$ 9.15	$ 8.77
Expected term (years)	4 years 9 months 18 days	4 years 6 months	4 years 6 months
Expected volatility	29.30%	28.00%	22.90%
Dividend yield	3.50%	4.10%	3.60%
Risk-free interest rates	1.60%	2.30%	2.50%

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STOCKHOLDERS' EQUITY AND EQUITY INSTRUMENTS (Summary of Activity) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Stock Options
Stock option activity
Outstanding at beginning of period (in shares)	887,867	708,746	562,877
Granted (in shares)	94,945	369,716	250,514
Exercised (in shares)	(4,454)	0	0
Cancelled/Expired (in shares)	(109,586)	(190,595)	(104,645)
Outstanding at end of period (in shares)	868,772	887,867	708,746
Stock option weighted-average exercise price
Outstanding at beginning of period (in dollars per share)	$ 64.21	$ 70.76	$ 75.89
Granted (in dollars per share)	58.91	54.15	59.61
Exercised (in dollars per share)	57.02	0	0
Cancelled/Expired (in dollars per share)	69.00	69.06	71.65
Outstanding at end of period (in dollars per share)	$ 63.06	$ 64.21	$ 70.76
RSUs
RSU and PSU activity
Outstanding at beginning of period (in shares)	217,413	83,308	70,856
Granted (in shares)	95,276	218,071	42,013
Released from restriction (in shares)	(76,570)	(32,630)	(16,905)
Cancelled/Expired (in shares)	(28,137)	(51,336)	(12,656)
Outstanding at end of period (in shares)	207,982	217,413	83,308
RSU and PSU weighted-average fair value
Outstanding at beginning of period (in dollars per share)	$ 52.07	$ 65.75	$ 74.63
Granted (in dollars per share)	58.24	49.73	60.28
Released from restriction (in dollars per share)	50.03	66.95	88.78
Cancelled/Expired (in dollars per share)	51.85	54.87	66.53
Outstanding at end of period (in dollars per share)	$ 55.68	$ 52.07	$ 65.75
PSUs
RSU and PSU activity
Outstanding at beginning of period (in shares)	179,397	126,638	112,036
Granted (in shares)	107,072	123,003	67,235
Released from restriction (in shares)	(11,575)	0	(2,753)
Cancelled/Expired (in shares)	(33,100)	(70,244)	(49,880)
Outstanding at end of period (in shares)	241,794	179,397	126,638
RSU and PSU weighted-average fair value
Outstanding at beginning of period (in dollars per share)	$ 61.43	$ 69.06	$ 79.48
Granted (in dollars per share)	74.73	56.88	64.30
Released from restriction (in dollars per share)	78.87	0	78.92
Cancelled/Expired (in dollars per share)	68.18	67.20	85.51
Outstanding at end of period (in dollars per share)	$ 65.57	$ 61.43	$ 69.06

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STOCKHOLDERS' EQUITY AND EQUITY INSTRUMENTS (Additional Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)	868,772	887,867
Number of options outstanding that are exercisable (in shares)	496,715	416,860
Compensation expense related to stock-based compensation awards	$ 9.9	$ 7.4	$ 7.8
Compensation expense paid in cash	0.5	1.1
Unrecorded compensation cost related to non-vested awards	$ 14.7
Unrecorded compensation cost, weighted average period of recognition	1 year 9 months 18 days
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of options vested	$ 1.4	0.8	2.7
Intrinsic value of stock options exercised during the period	0.1	$ 0.1	$ 0.1
Intrinsic value of options outstanding	3.1
Intrinsic value of options exercisable	$ 1.0

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STOCKHOLDERS' EQUITY AND EQUITY INSTRUMENTS (Summary of Exercise Price Range) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Options outstanding (in shares)	868,772	887,867
Weighted-average remaining contractual life (years)	4 years 1 month 6 days
Weighted-average exercise price of options outstanding (in dollars per share)	$ 63.06
Options exercisable (in shares)	496,715
Weighted-average remaining contractual life options exercisable	3 years 1 month 6 days
Weighted-average exercise price of exercisable options (in dollars per share)	$ 68.05
$53.75 - $54.38
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Exercise price range, lower range limit (in dollars per share)	53.75
Exercise price range, upper range limit (in dollars per share)	$ 54.38
Options outstanding (in shares)	252,245
Weighted-average remaining contractual life (years)	5 years 3 months 18 days
Weighted-average exercise price of options outstanding (in dollars per share)	$ 53.75
Options exercisable (in shares)	84,082
Weighted-average remaining contractual life options exercisable	5 years 3 months 18 days
Weighted-average exercise price of exercisable options (in dollars per share)	$ 53.75
$54.39 - $59.21
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Exercise price range, lower range limit (in dollars per share)	54.39
Exercise price range, upper range limit (in dollars per share)	$ 59.21
Options outstanding (in shares)	159,424
Weighted-average remaining contractual life (years)	5 years 8 months 12 days
Weighted-average exercise price of options outstanding (in dollars per share)	$ 57.01
Options exercisable (in shares)	18,836
Weighted-average remaining contractual life options exercisable	5 years 2 months 12 days
Weighted-average exercise price of exercisable options (in dollars per share)	$ 55.01
$59.22 - $63.75
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Exercise price range, lower range limit (in dollars per share)	59.22
Exercise price range, upper range limit (in dollars per share)	$ 63.75
Options outstanding (in shares)	159,445
Weighted-average remaining contractual life (years)	4 years 3 months 18 days
Weighted-average exercise price of options outstanding (in dollars per share)	$ 59.50
Options exercisable (in shares)	110,700
Weighted-average remaining contractual life options exercisable	4 years 3 months 18 days
Weighted-average exercise price of exercisable options (in dollars per share)	$ 59.50
$63.76 - $69.77
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Exercise price range, lower range limit (in dollars per share)	63.76
Exercise price range, upper range limit (in dollars per share)	$ 69.77
Options outstanding (in shares)	119,357
Weighted-average remaining contractual life (years)	3 years 1 month 6 days
Weighted-average exercise price of options outstanding (in dollars per share)	$ 68.03
Options exercisable (in shares)	104,796
Weighted-average remaining contractual life options exercisable	3 years
Weighted-average exercise price of exercisable options (in dollars per share)	$ 68.01
$69.78 - $91.75
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Exercise price range, lower range limit (in dollars per share)	69.78
Exercise price range, upper range limit (in dollars per share)	$ 91.75
Options outstanding (in shares)	178,301
Weighted-average remaining contractual life (years)	1 year 3 months 18 days
Weighted-average exercise price of options outstanding (in dollars per share)	$ 81.51
Options exercisable (in shares)	178,301
Weighted-average remaining contractual life options exercisable	1 year 3 months 18 days
Weighted-average exercise price of exercisable options (in dollars per share)	$ 81.51

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STOCKHOLDERS' EQUITY AND EQUITY INSTRUMENTS (Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 529.6	$ 540.2	$ 694.6
Other comprehensive income (loss) before reclassifications	(108.8)	20.6
Amounts reclassified from accumulated other comprehensive loss	(2.4)	(1.8)
Net current period other comprehensive income (loss)	(111.2)	18.8
Reclassification of stranded tax out of AOCI to retained earnings			0.0
Ending balance	387.0	529.6	540.2
Gains and (Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(0.6)	(0.7)
Other comprehensive income (loss) before reclassifications	3.9	2.2
Amounts reclassified from accumulated other comprehensive loss	(3.1)	(2.1)
Net current period other comprehensive income (loss)	0.8	0.1
Ending balance	0.2	(0.6)	(0.7)
Defined Benefit Pension
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(6.9)	(4.5)
Other comprehensive income (loss) before reclassifications	(3.2)	(2.7)
Amounts reclassified from accumulated other comprehensive loss	0.7	0.3
Net current period other comprehensive income (loss)	(2.5)	(2.4)
Ending balance	(9.4)	(6.9)	(4.5)
Foreign Currency
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(184.6)	(205.7)
Other comprehensive income (loss) before reclassifications	(109.5)	21.1
Amounts reclassified from accumulated other comprehensive loss	0.0	0.0
Net current period other comprehensive income (loss)	(109.5)	21.1
Ending balance	(294.1)	(184.6)	(205.7)
Total
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(192.1)	(210.9)	(77.9)
Reclassification of stranded tax out of AOCI to retained earnings			(0.2)
Ending balance	$ (303.3)	$ (192.1)	$ (210.9)

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STOCKHOLDERS' EQUITY AND EQUITY INSTRUMENTS (Amount Reclassified from AOCI) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense									$ (71.2)	$ (68.4)	$ (62.5)
Income tax expense									11.7	22.1	8.8
Net earnings	$ 32.3	$ (2.1)	$ 1.7	$ 27.6	$ 56.1	$ 10.6	$ (11.8)	$ 7.6	59.5	62.5	$ 68.8
Amount Reclassified from AOCL
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net earnings									(2.4)	(1.8)
Amount Reclassified from AOCL | Gains and (Losses) on Cash Flow Hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense									1.5	1.0
Net earnings									(3.1)	(2.1)
Amount Reclassified from AOCL | Gains and (Losses) on Cash Flow Hedges | Natural gas instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Product cost									(1.0)	(0.9)
Amount Reclassified from AOCL | Gains and (Losses) on Cash Flow Hedges | Foreign currency contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense									(3.6)	(2.2)
Amount Reclassified from AOCL | Defined Benefit Pension
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Product cost									0.9	0.4
Income tax expense									(0.2)	(0.1)
Net earnings									$ 0.7	$ 0.3

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FAIR VALUE MEASUREMENTS (Summary of Estimated Fair Values) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Asset Class:
Mutual fund investments in a non-qualified savings plan	$ 1.9	$ 1.4
Derivative Asset		2.8
Total Assets	4.7	4.2
Liability Class:
Liabilities related to non-qualified savings plan	(1.9)	(1.4)
Derivatives - natural gas instruments, net		(0.6)
Total Liabilities	(1.9)	$ (2.0)
Derivatives – natural gas instruments, net
Asset Class:
Derivative Asset	0.2
Derivatives - foreign currency contracts, net
Asset Class:
Derivative Asset	$ 2.6
Mutual Fund Investments | Common Stock of Large-cap U.S. Companies
Liability Class:
Percentage of concentration risk	30.00%	30.00%
Mutual Fund Investments | Common Stock of Small To Mid-cap U.S. Companies
Liability Class:
Percentage of concentration risk	10.00%	15.00%
Mutual Fund Investments | Common Stock of International Companies
Liability Class:
Percentage of concentration risk	5.00%	5.00%
Mutual Fund Investments | Bond Funds
Liability Class:
Percentage of concentration risk	15.00%	10.00%
Mutual Fund Investments | Short-term Investments
Liability Class:
Percentage of concentration risk	15.00%	20.00%
Mutual Fund Investments | Blended funds
Liability Class:
Percentage of concentration risk	25.00%	20.00%
Level One
Asset Class:
Mutual fund investments in a non-qualified savings plan	$ 1.9	$ 1.4
Derivative Asset		0.0
Total Assets	1.9	1.4
Liability Class:
Liabilities related to non-qualified savings plan	(1.9)	(1.4)
Derivatives - natural gas instruments, net		0.0
Total Liabilities	(1.9)	(1.4)
Level One | Derivatives – natural gas instruments, net
Asset Class:
Derivative Asset	0.0
Level One | Derivatives - foreign currency contracts, net
Asset Class:
Derivative Asset	0.0
Level Two
Asset Class:
Mutual fund investments in a non-qualified savings plan	0.0	0.0
Derivative Asset		2.8
Total Assets	2.8	2.8
Liability Class:
Liabilities related to non-qualified savings plan	0.0	0.0
Derivatives - natural gas instruments, net		(0.6)
Total Liabilities	0.0	(0.6)
Level Two | Derivatives – natural gas instruments, net
Asset Class:
Derivative Asset	0.2
Level Two | Derivatives - foreign currency contracts, net
Asset Class:
Derivative Asset	2.6
Level Three
Asset Class:
Mutual fund investments in a non-qualified savings plan	0.0	0.0
Derivative Asset		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
Total Liabilities	0.0	$ 0.0
Level Three | Derivatives – natural gas instruments, net
Asset Class:
Derivative Asset	0.0
Level Three | Derivatives - foreign currency contracts, net
Asset Class:
Derivative Asset	$ 0.0

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FAIR VALUE MEASUREMENTS (Additional Information) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Nov. 30, 2019
Debt Instrument [Line Items]
Mutual fund investments in a non-qualified savings plan	$ 1.9	$ 1.4
6.75% Senior Notes due December 2027
Debt Instrument [Line Items]
Stated interest rate (as a percent)	6.75%
Senior Notes July 2024
Debt Instrument [Line Items]
Stated interest rate (as a percent)	4.875%	4.875%
Senior notes | 6.75% Senior Notes due December 2027
Debt Instrument [Line Items]
Stated interest rate (as a percent)	6.75%
Senior notes	$ 543.1	$ 530.6
Senior notes | Senior Notes due 2027
Debt Instrument [Line Items]
Stated interest rate (as a percent)	6.75%		6.75%
Senior Notes due 2027
Debt Instrument [Line Items]
Debt instrument	$ 500.0	500.0
Fair Value | Senior Notes July 2024
Debt Instrument [Line Items]
Debt instrument	260.3	249.1
Fair Value | Credit agreement
Debt Instrument [Line Items]
Debt instrument	513.8	552.8
Carrying Value | Senior Notes July 2024
Debt Instrument [Line Items]
Debt instrument	250.0	250.0
Carrying Value | Credit agreement
Debt Instrument [Line Items]
Debt instrument	$ 520.3	$ 560.0

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OPERATING SEGMENTS (Segment Information) (Details) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2020 USD ($) segment Business	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments (in segments) | segment									3
Sales	$ 421.1	$ 282.4	$ 256.1	$ 413.9	$ 500.3	$ 341.3	$ 245.2	$ 403.7	$ 1,373.5	$ 1,490.5	$ 1,493.6
Operating earnings (loss)									140.5	163.6	130.3
Depreciation, depletion and amortization									137.9	137.9	136.9
Total assets	2,262.4				2,443.2				2,262.4	2,443.2	2,367.9
Capital expenditures									$ 84.9	98.1	96.8
Plant Nutrition South America
Segment Reporting Information [Line Items]
Number of primary businesses (in businesses) | Business									2
Reportable segments | Salt
Segment Reporting Information [Line Items]
Sales									$ 779.4	889.5	858.1
Operating earnings (loss)									161.8	168.0	115.7
Depreciation, depletion and amortization									66.6	60.4	56.2
Total assets	1,020.8				1,056.3				1,020.8	1,056.3	948.9
Capital expenditures									56.8	65.9	58.7
Reportable segments | Plant Nutrition North America
Segment Reporting Information [Line Items]
Sales									239.6	206.2	233.2
Operating earnings (loss)									12.1	22.5	25.3
Depreciation, depletion and amortization									40.4	44.6	48.6
Total assets	520.8				575.5				520.8	575.5	589.3
Capital expenditures									12.5	15.2	20.7
Reportable segments | Plant Nutrition South America
Segment Reporting Information [Line Items]
Sales									344.4	385.1	391.8
Operating earnings (loss)									40.3	40.0	48.7
Depreciation, depletion and amortization									17.4	22.4	22.2
Total assets	579.2				715.3				579.2	715.3	709.9
Capital expenditures									9.6	10.5	10.1
Corporate & other
Segment Reporting Information [Line Items]
Sales									10.1	9.7	10.5
Operating earnings (loss)									(73.7)	(66.9)	(59.4)
Depreciation, depletion and amortization									13.5	10.5	9.9
Total assets	$ 141.6				$ 96.1				141.6	96.1	119.8
Capital expenditures									6.0	6.5	7.3
Intersegment sales
Segment Reporting Information [Line Items]
Sales									(5.7)	(9.1)	(9.0)
Intersegment sales | Salt
Segment Reporting Information [Line Items]
Sales									0.0	0.0	0.0
Intersegment sales | Plant Nutrition North America
Segment Reporting Information [Line Items]
Sales									5.4	6.4	5.6
Intersegment sales | Plant Nutrition South America
Segment Reporting Information [Line Items]
Sales									0.3	2.7	3.4
Shipping and handling cost
Segment Reporting Information [Line Items]
Shipping and handling cost									266.6	312.5	320.0
Shipping and handling cost | Reportable segments | Salt
Segment Reporting Information [Line Items]
Shipping and handling cost									217.8	267.4	272.4
Shipping and handling cost | Reportable segments | Plant Nutrition North America
Segment Reporting Information [Line Items]
Shipping and handling cost									34.0	28.5	29.0
Shipping and handling cost | Reportable segments | Plant Nutrition South America
Segment Reporting Information [Line Items]
Shipping and handling cost									14.8	16.6	18.6
Shipping and handling cost | Corporate & other
Segment Reporting Information [Line Items]
Shipping and handling cost									$ 0.0	$ 0.0	$ 0.0

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OPERATING SEGMENTS (Information by Product) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Sales	$ 421.1	$ 282.4	$ 256.1	$ 413.9	$ 500.3	$ 341.3	$ 245.2	$ 403.7	$ 1,373.5	$ 1,490.5	$ 1,493.6
Logistics costs							$ 2.8			2.8
Severance and other costs, gross										2.3	5.1
Reportable segments | Salt
Segment Reporting Information [Line Items]
Sales									779.4	889.5	858.1
Reportable segments | Plant Nutrition North America
Segment Reporting Information [Line Items]
Sales									239.6	206.2	233.2
Reportable segments | Plant Nutrition South America
Segment Reporting Information [Line Items]
Sales									344.4	385.1	391.8
Corporate & other
Segment Reporting Information [Line Items]
Sales									10.1	9.7	10.5
Highway Deicing Salt
Segment Reporting Information [Line Items]
Sales									473.8	545.5	532.0
Highway Deicing Salt | Reportable segments | Salt
Segment Reporting Information [Line Items]
Sales									473.8	545.5	532.0
Highway Deicing Salt | Reportable segments | Plant Nutrition North America
Segment Reporting Information [Line Items]
Sales									0.0	0.0	0.0
Highway Deicing Salt | Reportable segments | Plant Nutrition South America
Segment Reporting Information [Line Items]
Sales									0.0	0.0	0.0
Highway Deicing Salt | Corporate & other
Segment Reporting Information [Line Items]
Sales									0.0	0.0	0.0
Consumer & Industrial Salt
Segment Reporting Information [Line Items]
Sales									305.6	344.0	326.1
Consumer & Industrial Salt | Reportable segments | Salt
Segment Reporting Information [Line Items]
Sales									305.6	344.0	326.1
Consumer & Industrial Salt | Reportable segments | Plant Nutrition North America
Segment Reporting Information [Line Items]
Sales									0.0	0.0	0.0
Consumer & Industrial Salt | Reportable segments | Plant Nutrition South America
Segment Reporting Information [Line Items]
Sales									0.0	0.0	0.0
Consumer & Industrial Salt | Corporate & other
Segment Reporting Information [Line Items]
Sales									0.0	0.0	0.0
SOP and Specialty Plant Nutrients
Segment Reporting Information [Line Items]
Sales									517.8	511.2	539.0
SOP and Specialty Plant Nutrients | Reportable segments | Salt
Segment Reporting Information [Line Items]
Sales									0.0	0.0	0.0
SOP and Specialty Plant Nutrients | Reportable segments | Plant Nutrition North America
Segment Reporting Information [Line Items]
Sales									245.0	212.6	238.8
SOP and Specialty Plant Nutrients | Reportable segments | Plant Nutrition South America
Segment Reporting Information [Line Items]
Sales									272.8	298.6	300.2
SOP and Specialty Plant Nutrients | Corporate & other
Segment Reporting Information [Line Items]
Sales									0.0	0.0	0.0
Industrial Chemicals
Segment Reporting Information [Line Items]
Sales									71.9	89.2	95.0
Industrial Chemicals | Reportable segments | Salt
Segment Reporting Information [Line Items]
Sales									0.0	0.0	0.0
Industrial Chemicals | Reportable segments | Plant Nutrition North America
Segment Reporting Information [Line Items]
Sales									0.0	0.0	0.0
Industrial Chemicals | Reportable segments | Plant Nutrition South America
Segment Reporting Information [Line Items]
Sales									71.9	89.2	95.0
Industrial Chemicals | Corporate & other
Segment Reporting Information [Line Items]
Sales									0.0	0.0	0.0
Eliminations & Other
Segment Reporting Information [Line Items]
Sales									4.4	0.6	1.5
Eliminations & Other | Reportable segments | Salt
Segment Reporting Information [Line Items]
Sales									0.0	0.0	0.0
Eliminations & Other | Reportable segments | Plant Nutrition North America
Segment Reporting Information [Line Items]
Sales									(5.4)	(6.4)	(5.6)
Eliminations & Other | Reportable segments | Plant Nutrition South America
Segment Reporting Information [Line Items]
Sales									(0.3)	(2.7)	(3.4)
Eliminations & Other | Corporate & other
Segment Reporting Information [Line Items]
Sales									$ 10.1	$ 9.7	$ 10.5

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OPERATING SEGMENTS (Information by Geographic Area) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Total sales	$ 421.1	$ 282.4	$ 256.1	$ 413.9	$ 500.3	$ 341.3	$ 245.2	$ 403.7	$ 1,373.5	$ 1,490.5	$ 1,493.6
Total long-lived assets	1,503.3				1,655.3				1,503.3	1,655.3	1,642.8
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total sales									766.6	821.9	769.9
Total long-lived assets	532.9				561.5				532.9	561.5	551.6
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Total sales									207.6	228.8	238.6
Total long-lived assets	514.0				522.8				514.0	522.8	497.4
Brazil
Revenues from External Customers and Long-Lived Assets [Line Items]
Total sales									336.6	375.2	381.8
Total long-lived assets	376.0				493.1				376.0	493.1	524.8
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Total sales									41.6	45.2	83.1
Total long-lived assets	73.9				71.4				73.9	71.4	62.5
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Total sales									21.1	19.4	20.2
Total long-lived assets	$ 6.5				$ 6.5				$ 6.5	$ 6.5	$ 6.5

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EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Numerator:
Net earnings	$ 32.3	$ (2.1)	$ 1.7	$ 27.6	$ 56.1	$ 10.6	$ (11.8)	$ 7.6	$ 59.5	$ 62.5	$ 68.8
Less: net earnings allocated to participating securities									(1.3)	(1.1)	(0.5)
Net earnings available to common stockholders									$ 58.2	$ 61.4	$ 68.3
Denominator:
Weighted average common shares outstanding, shares for basic earnings per share (in shares)	33,958	33,947	33,915	33,892	33,886	33,884	33,883	33,874	33,928	33,882	33,848
Weighted average equity awards outstanding (in shares)									0	0	0
Shares for diluted earnings per share (in shares)	33,977	33,947	33,915	33,892	33,886	33,884	33,883	33,874	33,928	33,882	33,848
Net earnings per common share, basic (in dollars per share)	$ 0.94	$ (0.07)	$ 0.04	$ 0.80	$ 1.64	$ 0.31	$ (0.36)	$ 0.22	$ 1.72	$ 1.82	$ 2.02
Net earnings per common share, diluted (in dollars per share)	$ 0.94	$ (0.07)	$ 0.04	$ 0.80	$ 1.63	$ 0.31	$ (0.36)	$ 0.22	$ 1.72	$ 1.81	$ 2.02
Net earnings allocated to participating securities (in shares)									397	307	186
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive weighted options outstanding (in shares)									1,188	1,067	788

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QUARTERLY RESULTS (Unaudited) (Schedule of Quarterly Results) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Sales	$ 421.1	$ 282.4	$ 256.1	$ 413.9	$ 500.3	$ 341.3	$ 245.2	$ 403.7	$ 1,373.5	$ 1,490.5	$ 1,493.6
Gross profit	100.0	58.7	66.3	87.3	142.0	76.4	45.8	72.6	312.3	336.8	293.9
Net earnings (loss)	$ 32.3	$ (2.1)	$ 1.7	$ 27.6	$ 56.1	$ 10.6	$ (11.8)	$ 7.6	$ 59.5	$ 62.5	$ 68.8
Net earnings (loss) per share, basic (in dollars per share)	$ 0.94	$ (0.07)	$ 0.04	$ 0.80	$ 1.64	$ 0.31	$ (0.36)	$ 0.22	$ 1.72	$ 1.82	$ 2.02
Net earnings (loss) per share, diluted (in dollars per share)	$ 0.94	$ (0.07)	$ 0.04	$ 0.80	$ 1.63	$ 0.31	$ (0.36)	$ 0.22	$ 1.72	$ 1.81	$ 2.02
Basic weighted-average shares outstanding (in shares)	33,958	33,947	33,915	33,892	33,886	33,884	33,883	33,874	33,928	33,882	33,848
Diluted weighted-average shares outstanding (in shares)	33,977	33,947	33,915	33,892	33,886	33,884	33,883	33,874	33,928	33,882	33,848

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QUARTERLY RESULTS (Unaudited) (Schedule of Quarterly Results Additional Information) (Details) - USD ($) $ in Millions	3 Months Ended			12 Months Ended
	Dec. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Release of domestic tax reserve	$ (11.0)
Logistics costs			$ 2.8	$ 2.8
Logistics costs, net			$ 2.1
Executive transition costs		$ 2.3
Executive transition costs, net of tax		$ 1.7

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SUBSEQUENT EVENT (Details)	Feb. 25, 2021 $ / shares
Subsequent Event
Subsequent Event [Line Items]
Cash dividend declared (in dollars per share)	$ 0.72

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Schedule II - Valuation Reserves (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Deducted from Receivables — Allowance for Doubtful Accounts
Valuation Reserves [Roll Forward]
Balance at the Beginning of the Year	$ 10.7	$ 9.9	$ 10.9
Additions (Deductions) Charged to Expense	9.3	4.7	1.0
Deductions	(8.9)	(3.9)	(2.0)
Balance at the End of the Year	11.1	10.7	9.9
Deducted from Deferred Income Taxes — Valuation Allowance
Valuation Reserves [Roll Forward]
Balance at the Beginning of the Year	41.2	40.9	10.2
Additions (Deductions) Charged to Expense	2.5	0.3	39.2
Deductions	(0.3)	0.0	(8.5)
Balance at the End of the Year	$ 43.4	$ 41.2	$ 40.9