10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

(Mark One)

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

For the quarterly period ended September 30, 2023

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 1-1070

Olin Corporation

(Exact name of registrant as specified in its charter)

Virginia	13-1872319
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

190 Carondelet Plaza,	Suite 1530,	Clayton,	MO	63105
(Address of principal executive offices)				(Zip Code)

(314) 480-1400

(Registrant’s telephone number, including area code)

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

Title of each class:	Trading symbol:	Name of each exchange on which registered:
Common Stock, $1.00 par value per share	OLN	New York Stock Exchange

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

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

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

Large accelerated filer ☒ Accelerated filer ☐ Non-accelerated filer ☐ Smaller reporting company ☐ Emerging growth company ☐

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

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

As of September 30, 2023, 122,549,597 shares of the registrant’s common stock were outstanding.

1

TABLE OF CONTENTS FOR FORM 10-Q		Page
Part I — Financial Information		3
Item 1.	Financial Statements	3
	Condensed Balance Sheets	3
	Condensed Statements of Operations	4
	Condensed Statements of Comprehensive Income (Loss)	5
	Condensed Statements of Shareholders’ Equity	6
	Condensed Statements of Cash Flows	7
	Notes to Condensed Financial Statements	8
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	29
	Business Background	29
	Executive Summary	29
	Consolidated Results of Operations	30
	Segment Results	33
	Outlook	36
	Environmental Matters	36
	Legal Matters and Contingencies	37
	Liquidity and Capital Resources	38
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	41
Item 4.	Controls and Procedures	42
	Cautionary Statement Regarding Forward-Looking Statements	42
Part II — Other Information		44
Item 1.	Legal Proceedings	44
Item 1A.	Risk Factors	44
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	44
Item 3.	Defaults Upon Senior Securities	44
Item 4.	Mine Safety Disclosures	44
Item 5.	Other Information	44
Item 6.	Exhibits	45
SIGNATURES		46

2

Part I — Financial Information

Item 1.  Financial Statements.

OLIN CORPORATION AND CONSOLIDATED SUBSIDIARIES

Condensed Balance Sheets

(In millions, except per share data)

(Unaudited)

	September 30, 2023		December 31, 2022		September 30, 2022
Assets
Current assets:
Cash and cash equivalents	$	158.3	$	194.0	$	163.6
Receivables, net	894.2		924.6		1,075.4
Income taxes receivable	28.0		43.2		26.0
Inventories, net	977.7		941.9		945.1
Other current assets	42.8		52.7		74.9
Total current assets	2,101.0		2,156.4		2,285.0
Property, plant and equipment (less accumulated depreciation of $4,724.6, $4,413.1 and $4,296.5)	2,490.2		2,674.1		2,690.8
Operating lease assets, net	331.0		356.0		371.4
Deferred income taxes	106.1		60.5		81.9
Other assets	1,117.3		1,102.5		1,090.7
Intangible assets, net	248.6		273.8		279.2
Goodwill	1,421.0		1,420.9		1,421.2
Total assets	$	7,815.2	$	8,044.2	$	8,220.2
Liabilities and Shareholders’ Equity
Current liabilities:
Current installments of long-term debt	$	78.9	$	9.7	$	1.0
Accounts payable	717.6		837.7		892.6
Income taxes payable	171.5		133.4		183.2
Current operating lease liabilities	68.3		71.8		74.3
Accrued liabilities	361.0		508.8		467.6
Total current liabilities	1,397.3		1,561.4		1,618.7
Long-term debt	2,711.2		2,571.0		2,580.4
Operating lease liabilities	270.4		292.5		305.1
Accrued pension liability	212.7		234.5		286.3
Deferred income taxes	500.7		507.3		546.8
Other liabilities	355.4		333.9		333.2
Total liabilities	5,447.7		5,500.6		5,670.5
Commitments and contingencies
Shareholders’ equity:
Common stock, $1.00 par value per share:  authorized, 240.0 shares; issued and outstanding, 122.5, 132.3 and 137.0 shares	122.5		132.3		137.0
Additional paid-in capital	130.1		682.7		920.3
Accumulated other comprehensive loss	(480.3)		(495.9)		(562.3)
Retained earnings	2,555.2		2,224.5		2,054.7
Olin Corporation’s shareholders’ equity	2,327.5		2,543.6		2,549.7
Noncontrolling interests	40.0		—		—
Total equity	2,367.5		2,543.6		2,549.7
Total liabilities and equity	$	7,815.2	$	8,044.2	$	8,220.2

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

3

OLIN CORPORATION AND CONSOLIDATED SUBSIDIARIES

Condensed Statements of Operations

(In millions, except per share data)

(Unaudited)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Sales	$	1,671.4	$	2,321.7	$	5,218.4	$	7,399.2
Operating expenses:
Cost of goods sold	1,402.3		1,840.9		4,236.6		5,599.8
Selling and administration	90.9		92.7		303.9		296.0
Restructuring charges	11.9		7.6		92.0		14.3
Other operating (expense) income	(0.3)		13.0		27.2		16.3
Operating income	166.0		393.5		613.1		1,505.4
Interest expense	46.2		36.0		133.9		103.4
Interest income	1.0		0.5		3.2		1.2
Non-operating pension income	5.9		9.9		17.0		29.0
Income before taxes	126.7		367.9		499.4		1,432.2
Income tax provision	22.2		52.7		96.2		301.9
Net income	$	104.5	$	315.2	$	403.2	$	1,130.3
Net income (loss) attributable to noncontrolling interests	0.4		—		(4.1)		—
Net income attributable to Olin Corporation	$	104.1	$	315.2	$	407.3	$	1,130.3
Net income attributable to Olin Corporation per common share:
Basic	$	0.84	$	2.23	$	3.19	$	7.62
Diluted	$	0.82	$	2.18	$	3.12	$	7.44
Average common shares outstanding:
Basic	124.2		141.2		127.5		148.3
Diluted	127.0		144.3		130.6		151.9

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

4

OLIN CORPORATION AND CONSOLIDATED SUBSIDIARIES

Condensed Statements of Comprehensive Income (Loss)

(In millions)

(Unaudited)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Net income	$	104.5	$	315.2	$	403.2	$	1,130.3
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(3.3)		(25.1)		(6.3)		(61.6)
Gains (losses) on derivative contracts, net	6.2		(8.7)		21.0		(33.0)
Amortization of prior service costs and actuarial losses, net	0.2		7.0		0.9		20.3
Total other comprehensive income (loss), net of tax	3.1		(26.8)		15.6		(74.3)
Comprehensive income	107.6		288.4		418.8		1,056.0
Comprehensive income (loss) attributable to noncontrolling interests	0.4		—		(4.1)		—
Comprehensive income attributable to Olin Corporation	$	107.2	$	288.4	$	422.9	$	1,056.0

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

5

OLIN CORPORATION AND CONSOLIDATED SUBSIDIARIES

Condensed Statements of Shareholders’ Equity

(In millions, except per share data)

(Unaudited)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Common Stock
Balance at beginning of period	$	125.8	$	145.1	$	132.3	$	156.8
Common stock repurchased and retired	(3.7)		(8.2)		(10.8)		(20.8)
Common stock issued for:
Stock options exercised	0.4		—		0.8		0.9
Other transactions	—		0.1		0.2		0.1
Balance at end of period	$	122.5	$	137.0	$	122.5	$	137.0
Additional Paid-In Capital
Balance at beginning of period	$	313.7	$	1,318.5	$	682.7	$	1,969.6
Common stock repurchased and retired	(198.3)		(402.7)		(584.3)		(1,079.8)
Common stock issued for:
Stock options exercised	9.9		0.4		21.5		20.4
Other transactions	0.1		0.1		1.6		3.1
Stock-based compensation	4.7		4.0		8.6		7.0
Balance at end of period	$	130.1	$	920.3	$	130.1	$	920.3
Accumulated Other Comprehensive Loss
Balance at beginning of period	$	(483.4)	$	(535.5)	$	(495.9)	$	(488.0)
Other comprehensive income (loss)	3.1		(26.8)		15.6		(74.3)
Balance at end of period	$	(480.3)	$	(562.3)	$	(480.3)	$	(562.3)
Retained Earnings
Balance at beginning of period	$	2,475.9	$	1,768.0	$	2,224.5	$	1,013.8
Net income	104.1		315.2		407.3		1,130.3
Common stock dividends paid	(24.8)		(28.5)		(76.6)		(89.4)
Balance at end of period	$	2,555.2	$	2,054.7	$	2,555.2	$	2,054.7
Olin Corporation’s Shareholders’ Equity	$	2,327.5	$	2,549.7	$	2,327.5	$	2,549.7
Noncontrolling Interests
Balance at beginning of period	$	39.6	$	—	$	—	$	—
Net income (loss)	0.4		—		(4.1)		—
Contributions from noncontrolling interests	—		—		44.1		—
Balance at end of period	$	40.0	$	—	$	40.0	$	—
Total Equity	$	2,367.5	$	2,549.7	$	2,367.5	$	2,549.7
Dividends declared per share of common stock	$	0.20	$	0.20	$	0.60	$	0.60

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

6

OLIN CORPORATION AND CONSOLIDATED SUBSIDIARIES

Condensed Statements of Cash Flows

(In millions)

(Unaudited)

	Nine Months Ended September 30,
	2023		2022
Operating Activities
Net income	$	403.2	$	1,130.3
Adjustments to reconcile net income to net cash and cash equivalents provided by (used for) operating activities:
Gains on disposition of property, plant and equipment	(27.0)		(13.0)
Stock-based compensation	13.2		10.4
Depreciation and amortization	404.9		450.3
Deferred income taxes	(60.6)		(3.7)
Write-off of equipment and facility included in restructuring charges	17.7		—
Qualified pension plan contributions	(1.6)		(0.9)
Qualified pension plan income	(15.0)		(24.7)
Change in:
Receivables	28.4		(25.8)
Income taxes receivable/payable	55.3		75.5
Inventories	(43.4)		(102.9)
Other current assets	9.8		5.8
Accounts payable and accrued liabilities	(222.7)		31.7
Other assets	(27.2)		(17.5)
Other noncurrent liabilities	29.5		(9.1)
Other operating activities	(6.8)		3.3
Net operating activities	557.7		1,509.7
Investing Activities
Capital expenditures	(173.0)		(168.4)
Payments under other long-term supply contracts	(46.2)		—
Proceeds from disposition of property, plant and equipment	28.8		14.9
Other investing activities	(3.6)		—
Net investing activities	(194.0)		(153.5)
Financing Activities
Long-term debt:
Borrowings	587.7		215.0
Repayments	(381.1)		(415.9)
Common stock repurchased and retired	(595.1)		(1,100.6)
Stock options exercised	22.3		21.3
Dividends paid	(76.6)		(89.4)
Contributions received from noncontrolling interests	44.1		—
Net financing activities	(398.7)		(1,369.6)
Effect of exchange rate changes on cash and cash equivalents	(0.7)		(3.5)
Net decrease in cash and cash equivalents	(35.7)		(16.9)
Cash and cash equivalents, beginning of year	194.0		180.5
Cash and cash equivalents, end of period	$	158.3	$	163.6
Cash paid for interest and income taxes:
Interest, net	$	148.9	$	122.1
Income taxes, net of refunds	$	81.9	$	213.0
Non-cash investing activities:
Decrease in capital expenditures included in accounts payable and accrued liabilities	$	17.9	$	12.0

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

7

OLIN CORPORATION AND CONSOLIDATED SUBSIDIARIES

Notes to Condensed Financial Statements

(Unaudited)

NOTE 1. DESCRIPTION OF BUSINESS

Olin Corporation (Olin) is a Virginia corporation, incorporated in 1892, having its principal executive offices in Clayton, MO. We are a leading vertically-integrated global manufacturer and distributor of chemical products and a leading U.S. manufacturer of ammunition. Our operations are concentrated in three business segments: Chlor Alkali Products and Vinyls, Epoxy and Winchester. All of our business segments are capital intensive manufacturing businesses. The Chlor Alkali Products and Vinyls segment manufactures and sells chlorine and caustic soda, ethylene dichloride and vinyl chloride monomer, methyl chloride, methylene chloride, chloroform, carbon tetrachloride, perchloroethylene, hydrochloric acid, hydrogen, bleach products and potassium hydroxide. The Epoxy segment produces and sells a full range of epoxy materials and precursors, including aromatics (acetone and phenol), allyl chloride, epichlorohydrin, liquid epoxy resins, solid epoxy resins and systems and growth products such as converted epoxy resins and additives. The Winchester segment produces and sells sporting ammunition, reloading components, small caliber military ammunition and components, industrial cartridges and clay targets.

On January 10, 2023, Blue Water Alliance (BWA), our joint venture with Mitsui & Co., Ltd. (Mitsui), began operations after receiving all necessary regulatory approvals. BWA is an independent global trader of ECU-based derivatives, focused on globally traded caustic soda and ethylene dichloride. Olin holds 51% interest and exercises control in BWA and the joint venture is consolidated in our consolidated financial statements with Mitsui’s 49% interest in BWA classified as noncontrolling interest. All intercompany accounts and transactions are eliminated in consolidation.

We have prepared the condensed financial statements included herein, without audit, pursuant to the rules and regulations of the United States (U.S.) Securities and Exchange Commission (SEC). The preparation of the financial statements requires estimates and assumptions that affect amounts reported and disclosed in the financial statements and related notes. In our opinion, these financial statements reflect all adjustments (consisting only of normal accruals), which are necessary to present fairly the results for interim periods. Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles have been condensed or omitted pursuant to such rules and regulations; however, we believe that the disclosures are appropriate. We recommend that you read these condensed financial statements in conjunction with the financial statements, accounting policies and the notes thereto and Management’s Discussion and Analysis of Financial Condition and Results of Operations included in our Annual Report on Form 10-K for the year ended December 31, 2022.

NOTE 2. RECENT ACCOUNTING PRONOUNCEMENTS

We do not believe that any recently issued effective pronouncements, or pronouncements issued but not yet effective, if adopted, would have a material effect on the accompanying condensed financial statements.

NOTE 3. RESTRUCTURING CHARGES

As a result of weak global resin demand and higher cost structures within the European region, we began a review of our global Epoxy asset footprint to optimize the most productive and cost effective assets to support our strategic operating model. As part of this review we announced operational cessations in the fourth quarter of 2022 and the first and second quarters of 2023 (collectively, Epoxy Optimization Plan). The foregoing actions will complete the rightsizing plan of our Epoxy business.

On June 20, 2023, we announced we had made the decision to cease all remaining operations at our Gumi, South Korea facility, reduce epoxy resin capacity at our Freeport, TX facility, and reduce our sales and support staffing across Asia. These actions are expected to be substantially completed by December 31, 2023. On March 21, 2023, we announced we had made the decision to cease operations at our cumene facility in Terneuzen, Netherlands and solid epoxy resin production at our facilities in Gumi, South Korea and Guaruja, Brazil. The closures were completed in the first quarter 2023. During the fourth quarter of 2022, we committed to and completed a plan to close down one of our bisphenol production lines at our Stade, Germany site. For the three and nine months ended September 30, 2023, we recorded restructuring charges of $8.6 million and $79.7 million, respectively, for the write-off of equipment and facility costs, employee severance and related benefit costs, contract

8

termination costs and facility exit costs related to these actions. We expect to incur additional restructuring charges through 2026 of approximately $45 million related to these actions.

During 2021, we announced that we had made the decision to permanently close our diaphragm-grade chlor alkali capacity, representing 400,000 tons, at our McIntosh, AL facility (McIntosh Plan). The closure was completed during third quarter of 2022. For the three months ended September 30, 2023 and 2022, we recorded restructuring charges of $0.7 million and $5.5 million, respectively, for lease and other contract termination costs, facility exit costs, and for the write-off of equipment and facility costs related to this action. For the nine months ended September 30, 2023 and 2022, we recorded restructuring charges of $4.6 million and $7.1 million, respectively, for lease and other contract termination costs, facility exit costs, and for the write-off of equipment and facility costs related to this action. We expect to incur additional restructuring charges through 2027 of approximately $25 million related to these actions.

On January 18, 2021, we announced we had made the decision to permanently close our trichloroethylene and anhydrous hydrogen chloride liquefaction facilities in Freeport, TX (collectively, Freeport 2021 Plan), which were completed in the fourth quarter of 2021. For the three months ended September 30, 2023 and 2022, we recorded restructuring charges of $0.7 million and $0.4 million, respectively, for facility exit costs related to these actions. For the nine months ended September 30, 2023 and 2022, we recorded restructuring charges of $2.8 million and $1.9 million, respectively, for facility exit costs related to these actions. We expect to incur additional restructuring charges through 2025 of approximately $15 million related to these actions.

On December 11, 2019, we announced that we had made the decision to permanently close a chlor alkali plant with a capacity of 230,000 tons and our vinylidene chloride (VDC) production facility, both in Freeport, TX (collectively, Freeport 2019 Plan).  The VDC facility and related chlor alkali plant were closed during the fourth quarter of 2020 and second quarter of 2021, respectively. For the three months ended September 30, 2023 and 2022, we recorded restructuring charges of $1.9 million and $1.7 million, respectively, for facility exit costs related to these actions. For the nine months ended September 30, 2023 and 2022, we recorded restructuring charges of $4.9 million and $4.9 million, respectively, for facility exit costs related to these actions. We expect to incur additional restructuring charges through 2026 of approximately $25 million related to these actions.

On March 21, 2016, we announced that we had made the decision to close a combined total of 433,000 tons of chlor alkali capacity across three separate locations (collectively, Chlor Alkali 2016 Plan). For the nine months ended September 30, 2022, we recorded restructuring charges of $0.4 million, respectively, for facility exit costs and lease and other contract termination costs related to these actions. We do not expect to incur additional restructuring charges related to these capacity reductions.

9

The following table summarizes the 2023 and 2022 activities by major component of these restructuring actions and the remaining balances of accrued restructuring costs as of September 30, 2023 and 2022:

	Employee severance and related benefit costs		Lease and other contract termination costs		Facility exit costs		Write-off of equipment and facility		Total
	($ in millions)
Balance at January 1, 2022	$	6.9	$	5.4	$	—	$	—	$	12.3
Restructuring charges:
First quarter	—		0.1		2.6		0.4		3.1
Second quarter	—		0.2		3.1		0.3		3.6
Third quarter	—		—		4.9		2.7		7.6
Amounts utilized	(4.3)		(1.3)		(10.6)		(3.4)		(19.6)
Balance at September 30, 2022	$	2.6	$	4.4	$	—	$	—	$	7.0
Balance at January 1, 2023	$	9.4	$	4.2	$	—	$	—	$	13.6
Restructuring charges:
First quarter	—		39.7		8.4		12.8		60.9
Second quarter	3.3		1.7		9.3		4.9		19.2
Third quarter	2.6		2.0		7.3		—		11.9
Amounts utilized	(3.4)		(13.4)		(25.0)		(17.7)		(59.5)
Balance at September 30, 2023	$	11.9	$	34.2	$	—	$	—	$	46.1

The following table summarizes the cumulative restructuring charges of these restructuring actions by major component through September 30, 2023:

	Chlor Alkali Products and Vinyls								Epoxy		Corporate/other		Total
	McIntosh Plan		Freeport 2021 Plan		Freeport 2019 Plan		Chlor Alkali 2016 Plan		Epoxy Optimization Plan		Productivity Plan
	($ in millions)
Write-off of equipment and facility	$	2.7	$	—	$	58.9	$	78.1	$	18.3	$	—	$	158.0
Employee severance and related benefit costs	—		—		2.1		6.7		13.3		10.3		32.4
Facility exit costs	9.4		11.9		16.5		53.2		12.7		—		103.7
Employee relocation costs	—		—		—		1.7		—		—		1.7
Lease and other contract termination costs	6.4		—		—		43.0		43.4		—		92.8
Total cumulative restructuring charges	$	18.5	$	11.9	$	77.5	$	182.7	$	87.7	$	10.3	$	388.6

As of September 30, 2023, we have incurred cash expenditures of $184.5 million and non-cash charges of $158.0 million related to these restructuring actions. The remaining balance of $46.1 million is expected to be paid out through 2028.

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NOTE 4. EARNINGS PER SHARE

Basic and diluted net income attributable to Olin Corporation per share are computed by dividing net income attributable to Olin Corporation by the weighted-average number of common shares outstanding. Diluted net income attributable to Olin Corporation per share reflects the dilutive effect of stock-based compensation.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Computation of Net Income per Share	(In millions, except per share data)
Net income	$	104.5	$	315.2	$	403.2	$	1,130.3
Net income (loss) attributable to noncontrolling interests	0.4		—		(4.1)		—
Net income attributable to Olin Corporation	$	104.1	$	315.2	$	407.3	$	1,130.3
Basic shares	124.2		141.2		127.5		148.3
Basic net income attributable to Olin Corporation per share	$	0.84	$	2.23	$	3.19	$	7.62
Diluted shares:
Basic shares	124.2		141.2		127.5		148.3
Stock-based compensation	2.8		3.1		3.1		3.6
Diluted shares	127.0		144.3		130.6		151.9
Diluted net income attributable to Olin Corporation per share	$	0.82	$	2.18	$	3.12	$	7.44

The computation of dilutive shares does not include 1.3 million shares for both the three and nine months ended September 30, 2023 and 0.7 million shares for both the three and nine months ended September 30, 2022, as their effect would have been anti-dilutive.

NOTE 5. ACCOUNTS RECEIVABLES

We maintain a $425.0 million Receivables Financing Agreement (Receivables Financing Agreement) that is scheduled to mature on October 14, 2025. Under the Receivables Financing Agreement, our eligible trade receivables are used for collateralized borrowings and continue to be serviced by us. In addition, the Receivables Financing Agreement incorporates the net leverage ratio covenant that is contained in the $1,550.0 million Senior Credit Facility. As of September 30, 2023, December 31, 2022 and September 30, 2022, we had $350.0 million, $300.0 million and $300.0 million, respectively, drawn under the agreement. As of September 30, 2023, $489.4 million of our trade receivables were pledged as collateral and we had $7.2 million of additional borrowing capacity under the Receivables Financing Agreement, which was limited by our borrowing base.

Olin also has trade accounts receivable factoring arrangements (AR Facilities) and pursuant to the terms of the AR Facilities, certain of our domestic subsidiaries may sell their accounts receivable up to a maximum of $175.5 million and certain of our foreign subsidiaries may sell their accounts receivable up to a maximum of €22.0 million. We will continue to service the outstanding accounts sold.  These receivables qualify for sales treatment under ASC 860 “Transfers and Servicing” and, accordingly, the proceeds are included in net cash provided by operating activities in the condensed statements of cash flows.  The following table summarizes the AR Facilities activity:

	September 30,
	2023		2022
	($ in millions)
Balance at beginning of year	$	111.8	$	83.3
Gross receivables sold	749.5		769.3
Payments received from customers on sold accounts	(788.6)		(761.3)
Balance at end of period	$	72.7	$	91.3

The factoring discount paid under the AR Facilities is recorded as interest expense on the condensed statements of operations. The factoring discount was $1.3 million and $0.9 million for the three months ended September 30, 2023 and 2022, respectively, and $3.8 million and $1.8 million for the nine months ended September 30, 2023 and 2022, respectively. The

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agreements are without recourse and therefore no recourse liability had been recorded as of September 30, 2023, December 31, 2022 or September 30, 2022.

Our condensed balance sheets included an allowance for doubtful accounts receivables of $12.8 million, $12.6 million and $12.5 million and other receivables of $78.0 million, $71.6 million and $58.0 million at September 30, 2023, December 31, 2022 and September 30, 2022, respectively, which were included in receivables, net.

NOTE 6. INVENTORIES

Inventories consisted of the following:

	September 30, 2023		December 31, 2022		September 30, 2022
	($ in millions)
Supplies	$	150.3	$	137.6	$	137.2
Raw materials	178.3		201.2		203.4
Work in process	188.4		199.6		189.6
Finished goods	615.5		559.3		569.2
Inventories excluding LIFO reserve	1,132.5		1,097.7		1,099.4
LIFO reserve	(154.8)		(155.8)		(154.3)
Inventories, net	$	977.7	$	941.9	$	945.1

Inventories under the LIFO method are based on annual estimates of quantities and costs as of year-end; therefore, the condensed financial statements at September 30, 2023 reflect certain estimates relating to inventory quantities and costs at December 31, 2023. The replacement cost of our inventories would have been approximately $154.8 million, $155.8 million and $154.3 million higher than reported at September 30, 2023, December 31, 2022 and September 30, 2022, respectively.

NOTE 7. OTHER ASSETS

Included in other assets were the following:

	September 30, 2023		December 31, 2022		September 30, 2022
	($ in millions)
Supply contracts	$	1,060.6	$	1,048.0	$	1,013.8
Other	56.7		54.5		76.9
Other assets	$	1,117.3	$	1,102.5	$	1,090.7

Amortization expense of $17.8 million and $17.6 million for the three months ended September 30, 2023 and 2022, respectively, and amortization expense of $53.4 million and $52.8 million for the nine months ended September 30, 2023 and 2022, respectively, was recognized within cost of goods sold related to our long-term supply contracts and is reflected in depreciation and amortization on the condensed statements of cash flows.

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NOTE 8. GOODWILL AND INTANGIBLE ASSETS

Changes in the carrying value of goodwill were as follows:

	Chlor Alkali Products and Vinyls		Epoxy		Total
	($ in millions)
Balance at January 1, 2022	$	1,275.6	$	145.0	$	1,420.6
Foreign currency translation adjustment	0.5		0.1		0.6
Balance at September 30, 2022	$	1,276.1	$	145.1	$	1,421.2
Balance at January 1, 2023	$	1,275.8	$	145.1	$	1,420.9
Foreign currency translation adjustment	0.1		—		0.1
Balance at September 30, 2023	$	1,275.9	$	145.1	$	1,421.0

Intangible assets consisted of the following:

	September 30, 2023						December 31, 2022						September 30, 2022
	Gross Amount		Accumulated Amortization		Net		Gross Amount		Accumulated Amortization		Net		Gross Amount		Accumulated Amortization		Net
	($ in millions)
Customers, customer contracts and relationships	$	668.0	$	(426.8)	$	241.2	$	669.1	$	(401.2)	$	267.9	$	662.0	$	(389.3)	$	272.7
Acquired technology	92.8		(89.4)		3.4		93.1		(88.3)		4.8		91.9		(86.5)		5.4
Other	4.7		(0.7)		4.0		1.8		(0.7)		1.1		1.8		(0.7)		1.1
Total intangible assets	$	765.5	$	(516.9)	$	248.6	$	764.0	$	(490.2)	$	273.8	$	755.7	$	(476.5)	$	279.2

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NOTE 9. DEBT

	Long-term Debt Borrowings (Repayments) for the Nine Months Ended
	September 30, 2023		September 30, 2022
Debt Instruments	($ in millions)
Borrowings:
Senior Revolving Credit Facility	255.0		170.0
Receivables Financing Agreement	332.7		45.0
Total borrowings	$	587.7	$	215.0
Repayments:
5.50% senior notes due 2022	—		(200.0)
Senior Term Loan	(6.6)		—
Senior Revolving Credit Facility	(90.0)		(170.0)
Receivables Financing Agreement	(282.7)		(45.0)
Finance leases	(1.8)		(0.9)
Total repayments	$	(381.1)	$	(415.9)
Long-term debt borrowings (repayments), net	$	206.6	$	(200.9)

Senior Credit Facility

On October 11, 2022, we entered into a new $1,550.0 million senior credit facility (Senior Credit Facility) that replaced our previous senior credit facility (2021 Senior Credit Facility), which included outstanding term loans of $350.0 million and a senior revolving credit facility with aggregate commitments in an amount equal to $800.0 million. The Senior Credit Facility includes a senior term loan facility with aggregate commitments of $350.0 million (Term Loan Facility) and a senior revolving credit facility with aggregate commitments of $1,200.0 million (Senior Revolving Credit Facility). The Term Loan Facility was fully drawn on the closing date with the proceeds of the Term Loan Facility used to refinance the loans and commitments outstanding under the 2021 Senior Credit Facility. The Term Loan Facility requires principal amortization amounts payable beginning March 31, 2023 at a rate of 0.625% per quarter through the end of 2024, increasing to 1.250% per quarter thereafter until maturity. The maturity date for the Senior Credit Facility is October 11, 2027.

The Senior Revolving Credit Facility includes a $100.0 million letter of credit subfacility. At September 30, 2023, we had $1,034.6 million available under our $1,200.0 million Senior Revolving Credit Facility because we had $165.0 million borrowed under the facility and issued $0.4 million of letters of credit.

We were in compliance with all covenants and restrictions under all our outstanding credit agreements as of September 30, 2023, and no event of default had occurred that would permit the lenders under our outstanding credit agreements to accelerate the debt if not cured. In the future, our ability to generate sufficient operating cash flows, among other factors, will determine the amounts available to be borrowed under these facilities. As a result of our restrictive covenant related to the net leverage ratio, the maximum additional borrowings available to us could be limited in the future. The limitation, if an amendment or waiver from our lenders is not obtained, could restrict our ability to borrow the maximum amounts available under the Senior Revolving Credit Facility and the Receivables Financing Agreement.  As of September 30, 2023, there were no covenants or other restrictions that limited our ability to borrow.

NOTE 10. PENSION PLANS AND RETIREMENT BENEFITS

We sponsor domestic and foreign defined benefit pension plans for eligible employees and retirees. Most of our domestic employees participate in defined contribution plans.  However, a portion of our bargaining hourly employees continue to participate in our domestic qualified defined benefit pension plans under a flat-benefit formula. Our funding policy for the qualified defined benefit pension plans is consistent with the requirements of federal laws and regulations. Our foreign subsidiaries maintain pension and other benefit plans, which are consistent with local statutory practices.

Our domestic qualified defined benefit pension plan provides that if, within three years following a change of control of Olin, any corporate action is taken or filing made in contemplation of, among other things, a plan termination or merger or other

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transfer of assets or liabilities of the plan, and such termination, merger, or transfer thereafter takes place, plan benefits would automatically be increased for affected participants (and retired participants) to absorb any plan surplus (subject to applicable collective bargaining requirements).

We also provide certain postretirement healthcare (medical) and life insurance benefits for eligible active and retired domestic employees. The healthcare plans are contributory with participants’ contributions adjusted annually based on medical rates of inflation and plan experience.

	Pension Benefits				Other Postretirement Benefits
	Three Months Ended September 30,				Three Months Ended September 30,
	2023		2022		2023		2022
Components of Net Periodic Benefit (Income) Cost	($ in millions)
Service cost	$	1.4	$	2.0	$	0.1	$	0.2
Interest cost	26.4		15.1		0.4		0.2
Expected return on plans’ assets	(32.9)		(34.3)		—		—
Amortization of prior service cost	(0.1)		—		—		—
Recognized actuarial loss	0.3		9.0		—		0.1
Net periodic benefit (income) cost	$	(4.9)	$	(8.2)	$	0.5	$	0.5

	Pension Benefits				Other Postretirement Benefits
	Nine Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Components of Net Periodic Benefit (Income) Cost	($ in millions)
Service cost	$	4.2	$	6.5	$	0.5	$	0.8
Interest cost	79.1		46.0		1.3		0.8
Expected return on plans’ assets	(98.5)		(102.8)		—		—
Amortization of prior service cost	(0.3)		(0.4)		0.1		0.1
Recognized actuarial loss	0.9		26.2		0.4		1.1
Net periodic benefit (income) cost	$	(14.6)	$	(24.5)	$	2.3	$	2.8

We made cash contributions to our international qualified defined benefit pension plans of $1.6 million and $0.9 million for the nine months ended September 30, 2023 and 2022, respectively.

NOTE 11. INCOME TAXES

The effective tax rate for the three months ended September 30, 2023 included a net $7.2 million tax benefit, primarily associated with stock-based compensation and prior year tax positions, partially offset by an expense from a change in tax contingencies. After giving consideration to these items, the effective tax rate for the three months ended September 30, 2023 of 23.2% was higher than the 21.0% U.S. federal statutory rate primarily due to state income tax and an increase in the valuation allowance related to losses in foreign jurisdictions, partially offset by favorable permanent salt depletion deductions and foreign income taxes. The effective tax rate for the three months ended September 30, 2022 included a net $36.6 million benefit primarily associated with a legal entity liquidation. After giving consideration to this benefit, the effective tax rate for the three months ended September 30, 2022 of 24.3% was higher than the 21.0% U.S. federal statutory rate primarily due to state and foreign income taxes, partially offset by foreign income exclusions and favorable permanent salt depletion deductions.

The effective tax rate for the nine months ended September 30, 2023 included a net $24.4 million tax benefit, primarily associated with stock-based compensation and prior year tax positions, partially offset by an expense from a change in tax contingencies. After giving consideration to these items, the effective tax rate for the nine months ended September 30, 2023 of 24.1% was higher than the 21.0% U.S. federal statutory rate primarily due to state income tax and an increase in the valuation allowance related to losses in foreign jurisdictions, partially offset by favorable permanent salt depletion deductions

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and foreign income taxes. The effective tax rate for the nine months ended September 30, 2022 included a net $47.5 million tax benefit primarily associated with a legal entity liquidation, prior year tax positions and stock-based compensation. After giving consideration to these items, the effective tax rate for the nine months ended September 30, 2022 of 24.4% was higher than the 21.0% U.S. federal statutory rate primarily due to state and foreign income taxes, partially offset by foreign income exclusions and favorable permanent salt depletion deductions.

As of September 30, 2023, we had $62.1 million of gross unrecognized tax benefits, which would have a net $58.4 million impact on the effective tax rate, if recognized. As of September 30, 2022, we had $44.8 million of gross unrecognized tax benefits, of which $44.7 million would have impacted the effective tax rate, if recognized. The amounts of unrecognized tax benefits were as follows:

	September 30,
	2023		2022
	($ in millions)
Balance at beginning of year	$	51.6	$	43.4
Increases for prior year tax positions	1.3		0.3
Decreases for prior year tax positions	(0.3)		(0.7)
Increases for current year tax positions	10.1		5.9
Foreign currency translation adjustments	(0.6)		(4.1)
Balance at end of period	$	62.1	$	44.8

As of September 30, 2023, we believe it is reasonably possible that our total amount of unrecognized tax benefits will decrease by approximately $48.9 million over the next twelve months. The anticipated reduction primarily relates to settlements with taxing authorities and the expiration of federal, state and foreign statutes of limitation.

We operate globally and file income tax returns in numerous jurisdictions. Our tax returns are subject to examination by various federal, state and local tax authorities. Additionally, examinations are ongoing in various states and foreign jurisdictions. We believe we have adequately provided for all tax positions; however, amounts asserted by taxing authorities could be greater than our accrued position. For our primary tax jurisdictions, the tax years that remain subject to examination are as follows:

	Tax Years
U.S. federal income tax	2018 - 2022
U.S. state income tax	2012 - 2022
Canadian federal income tax	2016 - 2022
Brazil	2016 - 2022
Germany	2015 - 2022
China	2014 - 2022
The Netherlands	2016 - 2022

NOTE 12. CONTRIBUTING EMPLOYEE OWNERSHIP PLAN

The Contributing Employee Ownership Plan (CEOP) is a defined contribution plan available to essentially all domestic employees.  We provide a contribution to an individual retirement contribution account maintained with the CEOP equal to an amount of between 5.0% and 7.5% of the employee’s eligible compensation.  The defined contribution plan expense for the three months ended September 30, 2023 and 2022 was $8.4 million and $9.6 million, respectively, and for the nine months ended September 30, 2023 and 2022 was $28.6 million and $28.9 million, respectively.

Company matching contributions are invested in the same investment allocation as the employee’s contribution.  Our matching contributions for eligible employees for the three months ended September 30, 2023 and 2022 was $3.6 million and $4.0 million, respectively, and for the nine months ended September 30, 2023 and 2022 was $11.0 million and $10.8 million, respectively.

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NOTE 13. STOCK-BASED COMPENSATION

Stock-based compensation granted includes stock options, performance stock awards, restricted stock awards and deferred directors’ compensation. Stock-based compensation expense (benefit) was as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	($ in millions)
Stock-based compensation	$	6.7	$	5.8	$	19.5	$	20.0
Mark-to-market adjustments	(2.3)		(2.0)		(2.4)		(10.5)
Total expense	$	4.4	$	3.8	$	17.1	$	9.5

The fair value of each stock option granted, which typically vests ratably over three years, but not less than one year, was estimated on the date of grant, using the Black-Scholes option-pricing model with the following weighted-average assumptions:

Grant date	2023			2022
Dividend yield	1.32		%	1.60		%
Risk-free interest rate	4.07		%	1.93		%
Expected volatility of Olin common stock	47		%	48		%
Expected life (years)	7.0			7.0
Weighted-average grant fair value (per option)	$	28.74		$	21.18
Weighted-average exercise price	$	60.55		$	49.71
Options granted	562,124			742,100

Dividend yield was based on our current dividend yield as of the option grant date. Risk-free interest rate was based on zero coupon U.S. Treasury securities rates for the expected life of the options.  Expected volatility was based on our historical stock price movements, as we believe that historical experience is the best available indicator of the expected volatility. Expected life of the option grant was based on historical exercise and cancellation patterns, as we believe that historical experience is the best estimate for future exercise patterns.

Performance share awards are denominated in shares of our stock and are paid half in cash and half in stock.  Payouts for performance share awards are based on two criteria: (1) 50% of the award is based on Olin’s total shareholder returns (TSR) over the applicable three-year performance cycle in relation to the TSR over the same period among a portfolio of public companies which are selected in concert with outside compensation consultants and (2) 50% of the award is based on Olin’s net income over the applicable three-year performance cycle in relation to the net income goal for such period as set by the compensation committee of Olin’s board of directors. The expense associated with performance shares is recorded based on our estimate of our performance relative to the respective target.  If an employee leaves the company before the end of the performance cycle, the performance shares may be prorated based on the number of months of the performance cycle worked and are settled in cash instead of half in cash and half in stock when the three-year performance cycle is completed.

The fair value of each performance share award based on net income was estimated on the date of grant, using the current stock price. The fair value of each performance share award based on TSR was estimated on the date of grant, using a Monte Carlo simulation model with the following weighted average assumptions:

Grant date	2023			2022
Risk-free interest rate	4.46		%	1.74		%
Expected volatility of Olin common stock	52		%	59		%
Expected average volatility of peer companies	42		%	47		%
Average correlation coefficient of peer companies	0.51			0.51
Expected life (years)	3.0			3.0
Grant date fair value (TSR based award)	$	86.98		$	64.13
Grant date fair value (net income based award)	$	60.55		$	49.71
Awards granted	161,474			184,000

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Risk-free interest rate was based on zero coupon U.S. Treasury securities rates for the expected life of the performance stock awards. Expected volatility of Olin common stock and peer companies was based on historical stock price movements, as we believe that historical experience is the best available indicator of the expected volatility. The average correlation coefficient of peer companies was determined based on historical trends of Olin’s common stock price compared to the peer companies. Expected life of the performance share award grant was based on historical exercise and cancellation patterns, as we believe that historical experience is the best estimate of future exercise patterns.

NOTE 14. SHAREHOLDERS’ EQUITY

On July 28, 2022, our Board of Directors authorized a share repurchase program for the purchase of shares of common stock at an aggregate price of up to $2.0 billion (the 2022 Repurchase Authorization). This program will terminate upon the purchase of $2.0 billion of common stock.

For the nine months ended September 30, 2023 and 2022, 10.8 million and 20.8 million shares, respectively, of common stock were repurchased and retired at a total value of $595.1 million and $1,100.6 million, respectively. As of September 30, 2023, 16.7 million shares of common stock have been repurchased and retired at a total value of $887.9 million under the 2022 Repurchase Authorization program, and $1,112.1 million of common stock remained authorized to be repurchased under the program.

We issued 0.8 million and 0.9 million shares representing stock options exercised for the nine months ended September 30, 2023 and 2022, respectively, with a total value of $22.3 million and $21.3 million, respectively.

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The following table represents the activity included in accumulated other comprehensive loss:

	Foreign Currency Translation Adjustment		Gains (Losses) on Derivative Contracts (net of taxes)		Pension and Other Postretirement Benefits (net of taxes)		Accumulated Other Comprehensive Loss
	($ in millions)
Balance at January 1, 2022	$	(10.9)	$	22.8	$	(499.9)	$	(488.0)
Unrealized (losses) gains:
First quarter	(10.5)		52.8		—		42.3
Second quarter	(26.0)		(36.4)		—		(62.4)
Third quarter	(25.1)		6.6		—		(18.5)
Reclassification adjustments of (gains) losses into income:
First quarter	—		(12.4)		8.9		(3.5)
Second quarter	—		(36.1)		9.0		(27.1)
Third quarter	—		(17.8)		9.1		(8.7)
Tax (provision) benefit:
First quarter	—		(9.7)		(2.3)		(12.0)
Second quarter	—		17.5		(2.3)		15.2
Third quarter	—		2.5		(2.1)		0.4
Net change	(61.6)		(33.0)		20.3		(74.3)
Balance at September 30, 2022	$	(72.5)	$	(10.2)	$	(479.6)	$	(562.3)
Balance at January 1, 2023	$	(38.6)	$	(32.5)	$	(424.8)	$	(495.9)
Unrealized gains (losses):
First quarter	5.5		(20.8)		—		(15.3)
Second quarter	(8.5)		(10.7)		—		(19.2)
Third quarter	(3.3)		(1.9)		—		(5.2)
Reclassification adjustments of losses into income:
First quarter	—		30.7		0.4		31.1
Second quarter	—		20.5		0.5		21.0
Third quarter	—		10.2		0.2		10.4
Tax provision:
First quarter	—		(2.5)		(0.1)		(2.6)
Second quarter	—		(2.4)		(0.1)		(2.5)
Third quarter	—		(2.1)		—		(2.1)
Net change	(6.3)		21.0		0.9		15.6
Balance at September 30, 2023	$	(44.9)	$	(11.5)	$	(423.9)	$	(480.3)

Net income and cost of goods sold included reclassification adjustments for realized gains and losses on derivative contracts from accumulated other comprehensive loss.

Net income and non-operating pension income included the amortization of prior service costs and actuarial losses from accumulated other comprehensive loss.

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NOTE 15. SEGMENT INFORMATION

We define segment results as income (loss) before interest expense, interest income, other operating income (expense), non-operating pension income, other income and income taxes. We have three operating segments: Chlor Alkali Products and Vinyls, Epoxy and Winchester. The three operating segments reflect the organization used by our management for purposes of allocating resources and assessing performance. Chlorine and caustic soda used in our Epoxy segment is transferred at cost from the Chlor Alkali Products and Vinyls segment. BWA is consolidated in our Chlor Alkali Products and Vinyls segment. Sales are attributed to geographic areas based on customer location.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Sales:	($ in millions)
Chlor Alkali Products and Vinyls	$	969.6	$	1,263.5	$	3,089.0	$	3,912.2
Epoxy	321.6		644.1		1,016.1		2,206.3
Winchester	380.2		414.1		1,113.3		1,280.7
Total sales	$	1,671.4	$	2,321.7	$	5,218.4	$	7,399.2
Income (loss) before taxes:
Chlor Alkali Products and Vinyls	$	172.3	$	253.9	$	598.3	$	929.0
Epoxy	(28.8)		80.1		(7.9)		358.0
Winchester	64.5		89.0		190.2		327.2
Corporate/other:
Environmental expense	(6.9)		(7.4)		(23.1)		(18.0)
Other corporate and unallocated costs	(22.9)		(27.5)		(79.6)		(92.8)
Restructuring charges	(11.9)		(7.6)		(92.0)		(14.3)
Other operating (expense) income	(0.3)		13.0		27.2		16.3
Interest expense	(46.2)		(36.0)		(133.9)		(103.4)
Interest income	1.0		0.5		3.2		1.2
Non-operating pension income	5.9		9.9		17.0		29.0
Income before taxes	$	126.7	$	367.9	$	499.4	$	1,432.2

Other operating (expense) income for the nine months ended September 30, 2023 included a gain of $27.0 million for the sale of our domestic private trucking fleet and operations. Other operating (expense) income for both the three and nine months ended September 30, 2022 included a gain of $13.0 million for the sale of two former manufacturing facilities.

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	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Sales by geography:	($ in millions)
Chlor Alkali Products and Vinyls
United States	$	651.0	$	870.8	$	2,069.8	$	2,636.6
Europe	57.9		80.9		175.3		233.7
Other foreign	260.7		311.8		843.9		1,041.9
Total Chlor Alkali Products and Vinyls	969.6		1,263.5		3,089.0		3,912.2
Epoxy
United States	131.4		201.0		431.8		696.7
Europe	84.8		280.3		258.8		993.7
Other foreign	105.4		162.8		325.5		515.9
Total Epoxy	321.6		644.1		1,016.1		2,206.3
Winchester
United States	327.7		377.2		982.9		1,180.3
Europe	19.8		7.5		43.4		27.0
Other foreign	32.7		29.4		87.0		73.4
Total Winchester	380.2		414.1		1,113.3		1,280.7
Total
United States	1,110.1		1,449.0		3,484.5		4,513.6
Europe	162.5		368.7		477.5		1,254.4
Other foreign	398.8		504.0		1,256.4		1,631.2
Total sales	$	1,671.4	$	2,321.7	$	5,218.4	$	7,399.2

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Sales by product line:	($ in millions)
Chlor Alkali Products and Vinyls
Caustic soda	$	422.3	$	598.4	$	1,424.0	$	1,752.4
Chlorine, chlorine-derivatives and other products	547.3		665.1		1,665.0		2,159.8
Total Chlor Alkali Products and Vinyls	969.6		1,263.5		3,089.0		3,912.2
Epoxy
Aromatics and allylics	116.9		316.8		387.9		1,092.9
Epoxy resins	204.7		327.3		628.2		1,113.4
Total Epoxy	321.6		644.1		1,016.1		2,206.3
Winchester
Commercial	181.2		271.6		581.1		906.4
Military and law enforcement	199.0		142.5		532.2		374.3
Total Winchester	380.2		414.1		1,113.3		1,280.7
Total sales	$	1,671.4	$	2,321.7	$	5,218.4	$	7,399.2

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NOTE 16. ENVIRONMENTAL

We are party to various government and private environmental actions associated with past manufacturing facilities and former waste disposal sites. The condensed balance sheets included reserves for future environmental expenditures to investigate and remediate known sites amounting to $153.5 million, $146.6 million and $149.3 million at September 30, 2023, December 31, 2022 and September 30, 2022, respectively, of which $128.5 million, $121.6 million and $124.3 million, respectively, were classified as other noncurrent liabilities.

Environmental provisions charged to income, which are included in costs of goods sold, were $6.9 million and $7.4 million for the three months ended September 30, 2023 and 2022, respectively, and $23.1 million and $18.0 million for the nine months ended September 30, 2023 and 2022, respectively.

Environmental exposures are difficult to assess for numerous reasons, including the identification of new sites, developments at sites resulting from investigatory studies, advances in technology, changes in environmental laws and regulations and their application, changes in regulatory authorities, the scarcity of reliable data pertaining to identified sites, the difficulty in assessing the involvement and financial capability of other Potentially Responsible Parties (PRPs), our ability to obtain contributions from other parties and the lengthy time periods over which site remediation occurs. It is possible that some of these matters (the outcomes of which are subject to various uncertainties) may be resolved unfavorably to us, which could materially adversely affect our financial position or results of operations.

NOTE 17. COMMITMENTS AND CONTINGENCIES

Olin, K.A. Steel Chemicals (a wholly owned subsidiary of Olin) and other caustic soda producers were named as defendants in six purported class action civil lawsuits filed March 22, 25 and 26, 2019 and April 12, 2019 in the U.S. District Court for the Western District of New York. Those cases were consolidated on May 22, 2019; the claims in the consolidated “Direct Purchaser” lawsuit, as modified, are on behalf of the respective named plaintiffs and a putative class comprised of all persons and entities who purchased certain types of caustic soda in the U.S. directly from one or more of the defendants, their parents, predecessors, subsidiaries or affiliates at any time on or after October 1, 2015 through December 31, 2018. In August 2023, one of the other defendants announced that it had settled the Direct Purchaser lawsuit and sought court approval of that settlement. Olin, K.A. Steel Chemicals and other caustic soda producers were also named as defendants in two purported class action civil lawsuits filed July 25 and 29, 2019 in the U.S. District Court for the Western District of New York on behalf of the respective named plaintiffs and a putative class comprised of all persons and entities who purchased caustic soda in the U.S. indirectly from distributors at any time on or after October 1, 2015. Those cases were consolidated and a consolidated, amended complaint in the “Indirect Purchaser” lawsuit was filed on August 23, 2021. The other current defendants in the Direct Purchaser and Indirect Purchaser lawsuits are Occidental Chemical Corporation d/b/a OxyChem, Westlake Chemical Corporation, Shin-Etsu Chemical Co., Ltd., and Formosa Plastics Corporation, U.S.A. The Direct Purchaser and Indirect Purchaser lawsuits allege the defendants conspired to fix, raise, maintain and stabilize the price of caustic soda, restrict domestic (U.S.) supply of caustic soda and allocate caustic soda customers. Plaintiffs seek damages and injunctive relief.

Olin, K.A. Steel Chemical, Olin Canada ULC, 3229897 Nova Scotia Co. (wholly owned subsidiaries of Olin) and other alleged caustic soda producers were named as defendants in a proposed class action civil lawsuit filed on October 7, 2020 in the Quebec Superior Court (Province of Quebec) on behalf of the respective named plaintiff and a putative class comprised of all Canadian persons and entities who, between October 1, 2015 and the date of the eventual class action certification, directly or indirectly purchased caustic soda or products containing caustic soda, produced by one or more of the defendants. Olin, K.A. Steel Chemical, Olin Canada ULC, 3229897 Nova Scotia Co. and other alleged caustic soda producers were also named as defendants in a proposed class action civil lawsuit filed November 13, 2020 in the Federal Court of Canada on behalf of the respective named plaintiff and a putative class comprised of all legal persons in Canada who, at any time on or after October 1, 2015 to the present, directly or indirectly purchased caustic soda. The other defendants named in the two Canadian lawsuits are Occidental Petroleum Corporation, Occidental Chemical Corporation, Oxy Canada Sales, Inc., Westlake Chemical Corporation, Axiall Canada, Inc., Shin-Etsu Chemical Co., Ltd., Shintech Incorporated, Formosa Plastics Corporation, and Formosa Plastics Corporation, U.S.A. The lawsuits allege the defendants conspired to fix, raise, maintain control, and stabilize the price of caustic soda, divide and allocate markets, sales, customers and territories, fix, maintain, control, prevent, restrict, lessen or eliminate production and supply of caustic soda, and agree to idle capacity of production and/or refrain from increasing their production capacity. Plaintiffs seek damages, including punitive damages.

We believe we have meritorious legal positions and will continue to represent our interests vigorously in the above matters. Any losses related to these matters are not currently estimable because of unresolved questions of fact and law, but if resolved unfavorably to Olin, could have a material adverse effect on our financial position, cash flows or results of operations.

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We, and our subsidiaries, are defendants in various other legal actions (including proceedings based on alleged exposures to asbestos) incidental to our past and current business activities. As of September 30, 2023, December 31, 2022 and September 30, 2022, our condensed balance sheets included accrued liabilities for these other legal actions of $15.3 million, $14.4 million and $14.2 million, respectively. These liabilities do not include costs associated with legal representation.  Based on our analysis, and considering the inherent uncertainties associated with litigation, we do not believe that it is reasonably possible that these other legal actions will materially adversely affect our financial position, cash flows or results of operations.

During the ordinary course of our business, contingencies arise resulting from an existing condition, situation or set of circumstances involving an uncertainty as to the realization of a possible gain contingency.  In certain instances, such as environmental projects, we are responsible for managing the cleanup and remediation of an environmental site.  There exists the possibility of recovering a portion of these costs from other parties.  We account for gain contingencies in accordance with the provisions of ASC 450 “Contingencies” and, therefore, do not record gain contingencies and recognize income until it is earned and realizable.

NOTE 18. DERIVATIVE FINANCIAL INSTRUMENTS

We are exposed to market risk in the normal course of our business operations due to our purchases of certain commodities, our ongoing investing and financing activities and our operations that use foreign currencies. The risk of loss can be assessed from the perspective of adverse changes in fair values, cash flows and future earnings. We have established policies and procedures governing our management of market risks and the use of financial instruments to manage exposure to such risks. ASC 815 “Derivatives and Hedging” (ASC 815) requires an entity to recognize all derivatives as either assets or liabilities in the condensed balance sheets and measure those instruments at fair value. In accordance with ASC 815, we designate derivative contracts as cash flow hedges of forecasted purchases of commodities and forecasted interest payments related to variable-rate borrowings and designate certain interest rate swaps as fair value hedges of fixed-rate borrowings. We do not enter into any derivative instruments for trading or speculative purposes.

Energy costs, including electricity and natural gas, and certain raw materials used in our production processes are subject to price volatility. Depending on market conditions, we may enter into futures contracts, forward contracts, commodity swaps and put and call option contracts in order to reduce the impact of commodity price fluctuations. The majority of our commodity derivatives expire within one year.

We actively manage currency exposures that are associated with net monetary asset positions, currency purchases and sales commitments denominated in foreign currencies and foreign currency denominated assets and liabilities created in the normal course of business. We enter into forward sales and purchase contracts to manage currency risk to offset our net exposures, by currency, related to the foreign currency denominated monetary assets and liabilities of our operations. All of the currency derivatives expire within one year and are for U.S. dollar (USD) equivalents. The counterparties to the forward contracts are large financial institutions; however, the risk of loss to us in the event of nonperformance by a counterparty could be significant to our financial position or results of operations. We had the following notional amounts of outstanding forward contracts to buy and sell foreign currency:

	September 30, 2023	December 31, 2022	September 30, 2022
	($ in millions)
Foreign Currency:
Buy	5.3	275.8	273.6
Sell	155.2	110.7	96.0

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Cash Flow Hedges

For derivative instruments that are designated and qualify as a cash flow hedge, the change in fair value of the derivative is recognized as a component of other comprehensive income (loss) until the hedged item is recognized in earnings.

We had the following notional amounts of outstanding commodity contracts that were entered into to hedge forecasted purchases:

	September 30, 2023		December 31, 2022		September 30, 2022
	($ in millions)
Natural gas	$	67.2	$	107.6	$	92.1
Ethane	25.5		46.0		45.5
Metals	114.8		107.6		134.5
Total notional	$	207.5	$	261.2	$	272.1

As of September 30, 2023, the counterparties to these commodity contracts were Wells Fargo Bank, N.A., Citibank, N.A., JPMorgan Chase Bank, National Association, Bank of America Corporation and The Toronto Dominion Bank, all of which are major financial institutions.

We use cash flow hedges for certain raw material and energy costs such as copper, zinc, lead, ethane, electricity and natural gas to provide a measure of stability in managing our exposure to price fluctuations associated with forecasted purchases of raw materials and energy used in our manufacturing process. At September 30, 2023, we had open derivative contract positions through 2028. If all open futures contracts had been settled on September 30, 2023, we would have recognized a pretax loss of $15.5 million.

If commodity prices were to remain at September 30, 2023 levels, approximately $12.6 million of deferred losses, net of tax, would be reclassified into earnings during the next twelve months. The actual effect on earnings will be dependent on actual commodity prices when the forecasted transactions occur.

Fair Value Hedges

We use interest rate swaps as a means of managing interest expense and floating interest rate exposure to optimal levels. For derivative instruments that are designated and qualify as a fair value hedge, the gain or loss on the derivative as well as the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in current earnings. We include the gain or loss on the hedged items (fixed-rate borrowings) in the same line item, interest expense, as the offsetting loss or gain on the related interest rate swaps.

Financial Statement Impacts

We present our derivative assets and liabilities in our condensed balance sheets on a net basis whenever we have a legally enforceable master netting agreement with the counterparty to our derivative contracts. We use these agreements to manage and substantially reduce our potential counterparty credit risk.

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The following table summarizes the location and fair value of the derivative instruments on our condensed balance sheets. The table disaggregates our net derivative assets and liabilities into gross components on a contract-by-contract basis before giving effect to master netting arrangements:

	September 30, 2023		December 31, 2022		September 30, 2022
	($ in millions)
Asset derivatives:
Other current assets
Derivatives designated as hedging instruments:
Commodity contracts - gains	$	1.7	$	2.4	$	15.1
Commodity contracts - losses	(0.4)		(0.9)		(1.5)
Derivatives not designated as hedging instruments:
Foreign exchange contracts - gains	1.2		0.3		1.3
Foreign exchange contracts - losses	(0.1)		—		(0.2)
Total other current assets	2.4		1.8		14.7
Other assets
Derivatives designated as hedging instruments:
Commodity contracts - gains	3.2		4.0		3.8
Commodity contracts - losses	—		—		(0.1)
Total other assets	3.2		4.0		3.7
Total asset derivatives(1)	$	5.6	$	5.8	$	18.4
Liability derivatives:
Accrued liabilities
Derivatives designated as hedging instruments:
Commodity contracts - losses	$	19.3	$	43.3	$	34.7
Commodity contracts - gains	(1.5)		(1.7)		(6.8)
Derivatives not designated as hedging instruments:
Foreign exchange contracts - losses	—		1.7		5.3
Foreign exchange contracts - gains	—		(0.8)		(1.8)
Total accrued liabilities	17.8		42.5		31.4
Other liabilities
Derivatives designated as hedging instruments:
Commodity contracts - losses	2.5		8.0		2.6
Commodity contracts - gains	(0.3)		(0.6)		—
Total other liabilities	2.2		7.4		2.6
Total liability derivatives(1)	$	20.0	$	49.9	$	34.0

(1)     Does not include the impact of cash collateral received from or provided to counterparties.

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The following table summarizes the effects of derivative instruments on our condensed statements of operations:

		Amount of Gain (Loss)
		Three Months Ended September 30,				Nine Months Ended September 30,
	Location of Gain (Loss)	2023		2022		2023		2022
Derivatives – Cash Flow Hedges		($ in millions)
Recognized in other comprehensive loss:
Commodity contracts	———	$	(1.9)	$	6.6	$	(33.4)	$	23.0
Reclassified from accumulated other comprehensive loss into income:
Commodity contracts	Cost of goods sold	$	(10.2)	$	17.8	$	(61.4)	$	66.3
Derivatives Not Designated as Hedging Instruments
Commodity contracts	Cost of goods sold	$	—	$	—	$	(0.6)	$	0.5
Foreign exchange contracts	Selling and administration	$	3.6	$	(15.6)	$	(9.6)	$	(42.7)

Credit Risk and Collateral

By using derivative instruments, we are exposed to credit and market risk. If a counterparty fails to fulfill its performance obligations under a derivative contract, our credit risk will equal the fair value gain in a derivative. Generally, when the fair value of a derivative contract is positive, this indicates that the counterparty owes us, thus creating a repayment risk for us. When the fair value of a derivative contract is negative, we owe the counterparty and, therefore, assume no repayment risk. We minimize the credit (or repayment) risk in derivative instruments by entering into transactions with high-quality counterparties. We monitor our positions and the credit ratings of our counterparties, and we do not anticipate non-performance by the counterparties.

Based on the agreements with our various counterparties, cash collateral is required to be provided when the net fair value of the derivatives, with the counterparty, exceeds a specific threshold. If the threshold is exceeded, cash is either provided by the counterparty to us if the value of the derivatives is our asset, or cash is provided by us to the counterparty if the value of the derivatives is our liability. As of September 30, 2023, December 31, 2022 and September 30, 2022, this threshold was not exceeded. In all instances where we are party to a master netting agreement, we offset the receivable or payable recognized upon payment of cash collateral against the fair value amounts recognized for derivative instruments that have also been offset under such master netting agreements.

NOTE 19. FAIR VALUE MEASUREMENTS

Fair value is defined as the price at which an asset could be exchanged in a current transaction between knowledgeable, willing parties or the amount that would be paid to transfer a liability to a new obligor, not the amount that would be paid to settle the liability with the creditor. Where available, fair value is based on observable market prices or parameters or derived from such prices or parameters. Where observable prices or inputs are not available, valuation models are applied. These valuation techniques involve some level of management estimation and judgment, the degree of which is dependent on the price transparency for the instruments or market and the instruments’ complexity.

Assets and liabilities recorded at fair value in the condensed balance sheets are categorized based upon the level of judgment associated with the inputs used to measure their fair value. Hierarchical levels, defined by ASC 820 “Fair Value Measurements and Disclosures” (ASC 820) are directly related to the amount of subjectivity associated with the inputs to fair valuation of these assets and liabilities, and are as follows:

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Level 1 — Inputs were unadjusted, quoted prices in active markets for identical assets or liabilities at the measurement date.

Level 2 — Inputs (other than quoted prices included in Level 1) were either directly or indirectly observable for the asset or liability through correlation with market data at the measurement date and for the duration of the instrument’s anticipated life.

Level 3 — Inputs reflected management’s best estimate of what market participants would use in pricing the asset or liability at the measurement date. Consideration was given to the risk inherent in the valuation technique and the risk inherent in the inputs to the model.

We are required to separately disclose assets and liabilities measured at fair value on a recurring basis, from those measured at fair value on a nonrecurring basis. Nonfinancial assets measured at fair value on a nonrecurring basis are intangible assets and goodwill, which are reviewed for impairment annually in the fourth quarter and/or when circumstances or other events indicate that impairment may have occurred.

Determining which hierarchical level an asset or liability falls within requires significant judgment. We evaluate our hierarchy disclosures each quarter. The following table summarizes the assets and liabilities measured at fair value in the condensed balance sheets:

	Fair Value Measurements
Balance at September 30, 2023	Level 1		Level 2		Level 3		Total
Assets	($ in millions)
Commodity contracts	$	—	$	4.5	$	—	$	4.5
Foreign exchange contracts	—		1.1		—		1.1
Total Assets	$	—	$	5.6	$	—	$	5.6
Liabilities
Commodity contracts	$	—	$	20.0	$	—	$	20.0
Total Liabilities	$	—	$	20.0	$	—	$	20.0
Balance at December 31, 2022
Assets
Commodity contracts	$	—	$	5.5	$	—	$	5.5
Foreign exchange contracts	—		0.3		—		0.3
Total Assets	$	—	$	5.8	$	—	$	5.8
Liabilities
Commodity contracts	$	—	$	49.0	$	—	$	49.0
Foreign exchange contracts	—		0.9		—		0.9
Total Liabilities	$	—	$	49.9	$	—	$	49.9
Balance at September 30, 2022
Assets
Commodity contracts	$	—	$	17.3	$	—	$	17.3
Foreign exchange contracts	—		1.1		—		1.1
Total Assets	$	—	$	18.4	$	—	$	18.4
Liabilities
Commodity contracts	$	—	$	30.5	$	—	$	30.5
Foreign exchange contracts	—		3.5		—		3.5
Total Liabilities	$	—	$	34.0	$	—	$	34.0

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Commodity Contracts

Commodity contract financial instruments were valued primarily based on prices and other relevant information observable in market transactions involving identical or comparable assets or liabilities including both forward and spot prices for commodities. We use commodity derivative contracts for certain raw materials and energy costs such as copper, zinc, lead, ethane, electricity and natural gas to provide a measure of stability in managing our exposure to price fluctuations.

Foreign Currency Contracts

Foreign currency contract financial instruments were valued primarily based on relevant information observable in market transactions involving identical or comparable assets or liabilities including both forward and spot prices for currencies. We enter into forward sales and purchase contracts to manage currency risk resulting from purchase and sale commitments denominated in foreign currencies.

Financial Instruments

The carrying values of cash and cash equivalents, accounts receivable and accounts payable approximated fair values due to the short-term maturities of these instruments. Since our long-term debt instruments may not be actively traded, the inputs used to measure the fair value of our long-term debt are based on current market rates for debt of similar risk and maturities and is classified as Level 2 in the fair value measurement hierarchy. As of September 30, 2023, December 31, 2022 and September 30, 2022, the fair value measurements of debt were $2,666.9 million, $2,517.7 million and $2,386.5 million, respectively.

Nonrecurring Fair Value Measurements

In addition to assets and liabilities that are recorded at fair value on a recurring basis, we record assets and liabilities at fair value on a nonrecurring basis as required by ASC 820. There were no assets or liabilities measured at fair value on a nonrecurring basis as of September 30, 2023, December 31, 2022 and September 30, 2022.

NOTE 20. SUBSEQUENT EVENT

On October 1, 2023, Olin acquired the assets of White Flyer Targets, LLC (“White Flyer”) from Reagent Diversified Holdings, Inc. for $63.7 million, subject to normal post-closing adjustments. The acquisition was financed with cash on hand. White Flyer designs, manufactures and sells recreational trap, skeet, international and sporting clay targets and will be included in Olin’s existing Winchester segment. The initial purchase accounting of the transaction is not yet complete as a result of the timing of the acquisition. The acquisition is not material and therefore supplemental pro forma financial information is not provided.

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

Business Background

Olin Corporation (Olin) is a Virginia corporation, incorporated in 1892, having its principal executive offices in Clayton, MO. We are a leading vertically-integrated global manufacturer and distributor of chemical products and a leading U.S. manufacturer of ammunition. Our operations are concentrated in three business segments: Chlor Alkali Products and Vinyls, Epoxy and Winchester. All of our business segments are capital intensive manufacturing businesses. The Chlor Alkali Products and Vinyls segment manufactures and sells chlorine and caustic soda, ethylene dichloride and vinyl chloride monomer, methyl chloride, methylene chloride, chloroform, carbon tetrachloride, perchloroethylene, hydrochloric acid, hydrogen, bleach products and potassium hydroxide. The Epoxy segment produces and sells a full range of epoxy materials and precursors, including aromatics (acetone and phenol), allyl chloride, epichlorohydrin, liquid epoxy resins, solid epoxy resins and systems and growth products such as converted epoxy resins and additives. The Winchester segment produces and sells sporting ammunition, reloading components, small caliber military ammunition and components, industrial cartridges and clay targets.

Executive Summary

2023 Overview

Net income for the three and nine months ended September 30, 2023 was $104.1 million and $407.3 million, respectively, compared to $315.2 million and $1,130.3 million, respectively, for the comparable prior year periods. The decrease in net income from the prior year periods was primarily due to lower operating results across all of our business segments. Net income for the nine months ended September 30, 2023 also reflects a gain of $27.0 million for the sale of our domestic private trucking fleet and operations for cash proceeds of $28.5 million.

On January 10, 2023, Blue Water Alliance (BWA), our joint venture with Mitsui & Co., Ltd. (Mitsui), began operations after receiving all necessary regulatory approvals. BWA is an independent global trader of Electrochemical Unit (ECU)-based derivatives, focused on globally traded caustic soda and ethylene dichloride. Olin holds 51% interest and exercises control in BWA and the joint venture is consolidated in our consolidated financial statements with Mitsui’s 49% interest in BWA classified as noncontrolling interest. All intercompany accounts and transactions are eliminated in consolidation.

Chlor Alkali Products and Vinyls reported segment income of $172.3 million and $598.3 million for the three and nine months ended September 30, 2023, respectively. Chlor Alkali Products and Vinyls segment results for third quarter 2023 were lower than in the comparable prior year period primarily due to lower volumes and lower pricing, primarily caustic soda, partially offset by lower raw material and operating costs. Chlor Alkali Products and Vinyls segment results for the nine months ended September 30, 2023 were lower than in the comparable prior year period primarily due to lower volumes, partially offset by higher pricing across all products except vinyls intermediates and lower raw material and operating costs. The Chlor Alkali Products and Vinyls segment results for the three and nine months ended September 30, 2023 were also negatively impacted by higher costs and reduced profit from lost sales of $25.3 million and $104.2 million, respectively, associated with operating issues, related to the second quarter’s maintenance turnaround at our vinyl chloride monomer plant at the Freeport, TX facility. The vinyl chloride monomer plant resumed normal operations in the latter half of the third quarter.

Epoxy reported segment losses of $28.8 million and $7.9 million for the three and nine months ended September 30, 2023, respectively. Epoxy segment results were lower than in the comparable prior year periods primarily due to lower volumes and lower product pricing. Epoxy segment results in 2023 have been impacted by record exports out of Asia into the European and North American markets, negatively impacting pricing and volumes. Partially offsetting the lower volumes and pricing were lower raw material and operating costs.

Winchester reported segment income of $64.5 million and $190.2 million for the three and nine months ended September 30, 2023, respectively. Winchester segment results were lower than in the comparable prior year periods primarily due to lower commercial volumes and pricing, partially offset by higher domestic and international military sales.

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Liquidity and Share Repurchases

During the nine months ended September 30, 2023, we repurchased and retired 10.8 million shares of common stock at a total value of $595.1 million. As of September 30, 2023, we had $1,112.1 million of remaining authorized common stock to be purchased under our 2022 Repurchase Authorization Program.

During the nine months ended September 30, 2023, we had net borrowings of $206.6 million with $165.0 million borrowed under our Senior Revolving Credit Facility and $50.0 million under our Receivables Financing Agreement.

Subsequent Event

On October 1, 2023, Olin acquired the assets of White Flyer Targets, LLC (“White Flyer”) from Reagent Diversified Holdings, Inc. for $63.7 million, subject to normal post-closing adjustments. The acquisition was financed with cash on hand. White Flyer designs, manufactures and sells recreational trap, skeet, international and sporting clay targets and will be included in Olin’s existing Winchester segment.

Consolidated Results of Operations

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	($ in millions, except per share data)
Sales	$	1,671.4	$	2,321.7	$	5,218.4	$	7,399.2
Cost of goods sold	1,402.3		1,840.9		4,236.6		5,599.8
Gross margin	269.1		480.8		981.8		1,799.4
Selling and administration	90.9		92.7		303.9		296.0
Restructuring charges	11.9		7.6		92.0		14.3
Other operating (expense) income	(0.3)		13.0		27.2		16.3
Operating income	166.0		393.5		613.1		1,505.4
Interest expense	46.2		36.0		133.9		103.4
Interest income	1.0		0.5		3.2		1.2
Non-operating pension income	5.9		9.9		17.0		29.0
Income before taxes	126.7		367.9		499.4		1,432.2
Income tax provision	22.2		52.7		96.2		301.9
Net income	$	104.5	$	315.2	$	403.2	$	1,130.3
Net income (loss) attributable to noncontrolling interests	0.4		—		(4.1)		—
Net income attributable to Olin Corporation	$	104.1	$	315.2	$	407.3	$	1,130.3
Net income attributable to Olin Corporation per common share:
Basic	$	0.84	$	2.23	$	3.19	$	7.62
Diluted	$	0.82	$	2.18	$	3.12	$	7.44

Three Months Ended September 30, 2023 Compared to Three Months Ended September 30, 2022

Sales for the three months ended September 30, 2023 were $1,671.4 million compared to $2,321.7 million in the same period last year, a decrease of $650.3 million, or 28%. Epoxy sales decreased by $322.5 million, primarily due to lower volumes, including the closure of our cumene facility and one of our bisphenol (BisA) production lines, and lower product pricing. Chlor Alkali Products and Vinyls sales decreased by $293.9 million primarily due to lower volumes, partially offset by products sold by BWA, lower pricing and a less favorable mix. Winchester sales decreased by $33.9 million, primarily due to lower commercial sales volumes, partially offset by higher domestic and international military sales.

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Gross margin decreased $211.7 million for the three months ended September 30, 2023 compared to the prior year. Epoxy gross margin decreased by $111.4 million primarily due to lower pricing. Chlor Alkali Products and Vinyls gross margin decreased by $74.9 million primarily due to lower volumes and lower pricing. Winchester gross margin decreased by $26.0 million primarily due to lower commercial volumes. Gross margin as a percentage of sales decreased to 16% in 2023 from 21% in 2022.

Selling and administration expenses for the three months ended September 30, 2023 were $90.9 million, a decrease of $1.8 million from the prior year. The decrease was primarily due to lower legal-related costs of $6.2 million and lower variable incentive compensation expense of $3.8 million, which includes mark-to-market adjustments on stock-based compensation expense, partially offset by higher costs associated with BWA of $5.7 million. Selling and administration expenses as a percentage of sales increased to 5% in 2023 from 4% in 2022.

Restructuring charges for the three months ended September 30, 2023 and 2022 were $11.9 million and $7.6 million, respectively. The increase in charges was primarily due to our actions to reconfigure our global Epoxy asset footprint to optimize the most productive and cost effective assets to support our strategic operating model, which resulted in restructuring charges of $8.6 million in the third quarter 2023.

Other operating (expense) income for the three months ended September 30, 2022 included $13.0 million of gains for the sale of two former manufacturing facilities.

Interest expense increased by $10.2 million for the three months ended September 30, 2023 from the prior year primarily due to higher average interest rates.

Non-operating pension income includes all components of pension and other postretirement income (costs) other than service costs. Non-operating pension income was lower for the three months ended September 30, 2023 primarily due to an increase in the discount rate used to determine interest costs, partially offset by lower actuarial losses recognized to income.

The effective tax rate for the three months ended September 30, 2023 included a net $7.2 million tax benefit, primarily associated with stock-based compensation and prior year tax positions, partially offset by an expense from a change in tax contingencies. After giving consideration to these items, the effective tax rate for the three months ended September 30, 2023 of 23.2% was higher than the 21.0% U.S. federal statutory rate primarily due to state income tax and an increase in the valuation allowance related to losses in foreign jurisdictions, partially offset by favorable permanent salt depletion deductions and foreign income taxes. The effective tax rate for the three months ended September 30, 2022 included a net $36.6 million benefit primarily associated with a legal entity liquidation. After giving consideration to this benefit, the effective tax rate for the three months ended September 30, 2022 of 24.3% was higher than the 21.0% U.S. federal statutory rate primarily due to state and foreign income taxes, partially offset by foreign income exclusions and favorable permanent salt depletion deductions.

Nine Months Ended September 30, 2023 Compared to Nine Months Ended September 30, 2022

Sales for the nine months ended September 30, 2023 were $5,218.4 million compared to $7,399.2 million in the same period last year, a decrease of $2,180.8 million, or 29%. Epoxy sales decreased by $1,190.2 million, primarily due to lower volumes, including the closure of our cumene facility and one of our BisA production lines, and lower product pricing. Chlor Alkali Products and Vinyls sales decreased by $823.2 million primarily due to lower volumes, partially offset by products sold by BWA and higher pricing across all products except vinyls intermediates. Winchester sales decreased by $167.4 million, primarily due to lower commercial sales volumes, partially offset by higher domestic and international military sales.

Gross margin decreased $817.6 million for the nine months ended September 30, 2023 compared to the prior year. Epoxy gross margin decreased by $371.7 million primarily due to lower volumes and lower product pricing. Chlor Alkali Products and Vinyls gross margin decreased by $307.4 million primarily due to lower volumes. Winchester gross margin decreased by $137.1 million primarily due to lower commercial volumes. Gross margin as a percentage of sales decreased to 19% in 2023 from 24% in 2022.

Selling and administration expenses for the nine months ended September 30, 2023 were $303.9 million, an increase of $7.9 million from the prior year. The increase was primarily due to higher costs associated with BWA of $16.6 million and higher consulting costs of $3.0 million, partially offset by lower legal-related costs of $9.4 million and lower variable incentive compensation expense of $4.4 million, which includes mark-to-market adjustments on stock-based compensation expense. Selling and administration expenses as a percentage of sales increased to 6% in 2023 from 4% in 2022.

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Restructuring charges for the nine months ended September 30, 2023 and 2022 were $92.0 million and $14.3 million, respectively. The increase in charges was primarily due to our actions to reconfigure our global Epoxy asset footprint to optimize the most productive and cost effective assets to support our strategic operating model, which resulted in restructuring charges of $79.7 million.

Other operating (expense) income for the nine months ended September 30, 2023 included a gain of $27.0 million for the sale of our domestic private trucking fleet and operations. Other operating (expense) income for the nine months ended September 30, 2022 included $13.0 million of gains for the sale of two former manufacturing facilities.

Interest expense increased by $30.5 million for the nine months ended September 30, 2023 from the prior year primarily due to higher average interest rates.

Non-operating pension income includes all components of pension and other postretirement income (costs) other than service costs. Non-operating pension income was lower for the nine months ended September 30, 2023 primarily due to an increase in the discount rate used to determine interest costs, partially offset by lower actuarial losses recognized to income.

The effective tax rate for the nine months ended September 30, 2023 included a net $24.4 million tax benefit, primarily associated with stock-based compensation and prior year tax positions, partially offset by an expense from a change in tax contingencies. After giving consideration to these items, the effective tax rate for the nine months ended September 30, 2023 of 24.1% was higher than the 21.0% U.S. federal statutory rate primarily due to state income tax and an increase in the valuation allowance related to losses in foreign jurisdictions, partially offset by favorable permanent salt depletion deductions and foreign income taxes. The effective tax rate for the nine months ended September 30, 2022 included a net $47.5 million tax benefit primarily associated with a legal entity liquidation, prior year tax positions and stock-based compensation. After giving consideration to these items, the effective tax rate for the nine months ended September 30, 2022 of 24.4% was higher than the 21.0% U.S. federal statutory rate primarily due to state and foreign income taxes, partially offset by foreign income exclusions and favorable permanent salt depletion deductions.

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Segment Results

We define segment results as income (loss) before interest expense, interest income, other operating income (expense), non-operating pension income, other income and income taxes. We have three operating segments: Chlor Alkali Products and Vinyls, Epoxy and Winchester. The three operating segments reflect the organization used by our management for purposes of allocating resources and assessing performance. Chlorine and caustic soda used in our Epoxy segment is transferred at cost from the Chlor Alkali Products and Vinyls segment. BWA is consolidated in our Chlor Alkali Products and Vinyls segment.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Sales:	($ in millions)
Chlor Alkali Products and Vinyls	$	969.6	$	1,263.5	$	3,089.0	$	3,912.2
Epoxy	321.6		644.1		1,016.1		2,206.3
Winchester	380.2		414.1		1,113.3		1,280.7
Total sales	$	1,671.4	$	2,321.7	$	5,218.4	$	7,399.2
Income (loss) before taxes:
Chlor Alkali Products and Vinyls	$	172.3	$	253.9	$	598.3	$	929.0
Epoxy	(28.8)		80.1		(7.9)		358.0
Winchester	64.5		89.0		190.2		327.2
Corporate/other:
Environmental expense	(6.9)		(7.4)		(23.1)		(18.0)
Other corporate and unallocated costs	(22.9)		(27.5)		(79.6)		(92.8)
Restructuring charges	(11.9)		(7.6)		(92.0)		(14.3)
Other operating (expense) income(1)	(0.3)		13.0		27.2		16.3
Interest expense	(46.2)		(36.0)		(133.9)		(103.4)
Interest income	1.0		0.5		3.2		1.2
Non-operating pension income	5.9		9.9		17.0		29.0
Income before taxes	$	126.7	$	367.9	$	499.4	$	1,432.2

(1) Other operating (expense) income for the nine months ended September 30, 2023 included a gain of $27.0 million for the sale of our domestic private trucking fleet and operations. Other operating (expense) income for both the three and nine months ended September 30, 2022 included a gain of $13.0 million for the sale of two former manufacturing facilities.

Chlor Alkali Products and Vinyls

Three Months Ended September 30, 2023 Compared to Three Months Ended September 30, 2022

Chlor Alkali Products and Vinyls sales for the three months ended September 30, 2023 were $969.6 million compared to $1,263.5 million for the same period in 2022, a decrease of $293.9 million, or 23%. The sales decrease was primarily due to lower volumes, partially offset by products sold by BWA, lower pricing and a less favorable mix. The lower pricing was primarily due to lower caustic soda pricing.

Chlor Alkali Products and Vinyls segment income was $172.3 million for the three months ended September 30, 2023 compared to $253.9 million for the same period in 2022. The decrease in segment results of $81.6 million was due to lower volumes across all products ($199.6 million) and lower pricing ($84.0 million), primarily caustic soda. These decreases were partially offset by lower raw material and operating costs ($149.5 million), primarily lower natural gas and electrical power costs, and lower costs associated with product purchased from other parties ($52.5 million). The Chlor Alkali Products and Vinyls segment results were also negatively impacted by higher costs and reduced profit from lost sales associated with operating issues, related to the second quarter’s maintenance turnaround at our vinyl chloride monomer plant at the Freeport, TX facility. Chlor Alkali Products and Vinyls segment results included depreciation and amortization expense of $107.6 million and $121.1 million for the three months ended September 30, 2023 and 2022, respectively.

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Nine Months Ended September 30, 2023 Compared to Nine Months Ended September 30, 2022

Chlor Alkali Products and Vinyls sales for the nine months ended September 30, 2023 were $3,089.0 million compared to $3,912.2 million for the same period in 2022, a decrease of $823.2 million, or 21%. The sales decrease was primarily due to lower volumes, partially offset by products sold by BWA and higher prices across all products except vinyls intermediates.

Chlor Alkali Products and Vinyls segment income was $598.3 million for the nine months ended September 30, 2023 compared to $929.0 million for the same period in 2022. The decrease in segment results of $330.7 million was due to lower volumes across all products ($657.4 million), partially offset by lower raw material and operating costs ($223.1 million), higher prices ($67.3 million) and lower costs associated with product purchased from other parties ($36.3 million). The Chlor Alkali Products and Vinyls segment results were also negatively impacted by higher costs and reduced profit from lost sales associated with operating issues, related to the second quarter’s maintenance turnaround at our vinyl chloride monomer plant at the Freeport, TX facility. Chlor Alkali Products and Vinyls segment results included depreciation and amortization expense of $335.3 million and $364.6 million for the nine months ended September 30, 2023 and 2022, respectively.

Epoxy

Three Months Ended September 30, 2023 Compared to Three Months Ended September 30, 2022

Epoxy sales for the three months ended September 30, 2023 were $321.6 million compared to $644.1 million for the same period in 2022, a decrease of $322.5 million, or 50%. The sales decrease was primarily due to the closure of our cumene facility and one of our BisA production lines ($163.8 million), lower product prices ($150.5 million) and lower volumes ($12.0 million), partially offset by a favorable effect of foreign currency translation ($3.8 million).

Epoxy segment loss was $28.8 million for the three months ended September 30, 2023 compared to segment income of $80.1 million for the same period in 2022. The decrease in segment results of $108.9 million was primarily due to lower product prices ($150.5 million), partially offset by lower raw material and operating costs ($30.4 million), primarily decreased natural gas and electrical costs, and improved product mix ($11.2 million), which offset lower volumes as a result of the closure of our cumene facility and one of our BisA production lines. A significant percentage of our Euro denominated sales are of products manufactured within Europe. As a result, the impact of foreign currency translation on revenue is primarily offset by the impact of foreign currency translation on raw materials and manufacturing costs also denominated in Euros. Epoxy segment results included depreciation and amortization expense of $14.7 million and $20.1 million for the three months ended September 30, 2023 and 2022, respectively.

Nine Months Ended September 30, 2023 Compared to Nine Months Ended September 30, 2022

Epoxy sales for the nine months ended September 30, 2023 were $1,016.1 million compared to $2,206.3 million for the same period in 2022, a decrease of $1,190.2 million, or 54%. The sales decrease was primarily due to the closure of our cumene facility and one of our BisA production lines ($555.4 million), lower volumes ($324.7 million), lower product prices ($303.9 million) and an unfavorable effect of foreign currency translation ($6.2 million).

Epoxy segment loss was $7.9 million for the nine months ended September 30, 2023 compared to segment income of $358.0 million for the same period in 2022. The decrease in segment results of $365.9 million was primarily due to lower product prices ($303.9 million) and lower volumes ($181.9 million), which were both impacted by record exports out of Asia into the European and North American markets, partially offset by lower raw material and operating costs ($119.9 million). A significant percentage of our Euro denominated sales are of products manufactured within Europe. As a result, the impact of foreign currency translation on revenue is primarily offset by the impact of foreign currency translation on raw materials and manufacturing costs also denominated in Euros. Epoxy segment results included depreciation and amortization expense of $44.4 million and $60.9 million for the nine months ended September 30, 2023 and 2022, respectively.

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Winchester

Three Months Ended September 30, 2023 Compared to Three Months Ended September 30, 2022

Winchester sales were $380.2 million for the three months ended September 30, 2023 compared to $414.1 million for the same period in 2022, a decrease of $33.9 million, or 8%. The decrease was due to lower ammunition sales to commercial customers ($90.3 million) and law enforcement agencies ($5.2 million), partially offset by higher sales to domestic and international military customers ($61.6 million). Commercial ammunition sales were impacted by lower volumes and pricing.

Winchester segment income was $64.5 million for the three months ended September 30, 2023 compared to $89.0 million for the same period in 2022, a decrease of $24.5 million. The decrease in segment results was due to lower product pricing ($18.9 million) and lower volumes and mix ($15.6 million), partially offset by lower commodity and operating costs ($10.0 million). Winchester segment income included depreciation and amortization expense of $6.6 million and $6.1 million for the three months ended September 30, 2023 and 2022, respectively.

Nine Months Ended September 30, 2023 Compared to Nine Months Ended September 30, 2022

Winchester sales were $1,113.3 million for the nine months ended September 30, 2023 compared to $1,280.7 million for the same period in 2022, a decrease of $167.4 million, or 13%. The decrease was due to lower ammunition sales to commercial customers ($325.2 million), partially offset by higher sales to domestic and international military customers ($154.4 million) and law enforcement agencies ($3.4 million). Commercial ammunition sales were primarily impacted by lower volumes.

Winchester segment income was $190.2 million for the nine months ended September 30, 2023 compared to $327.2 million for the same period in 2022, a decrease of $137.0 million. The decrease in segment results was due to lower volumes and mix ($105.3 million), lower product pricing ($27.6 million) and higher commodity and operating costs ($4.1 million). Winchester segment income included depreciation and amortization expense of $19.1 million and $18.2 million for the nine months ended September 30, 2023 and 2022, respectively.

Corporate/Other

Three Months Ended September 30, 2023 Compared to Three Months Ended September 30, 2022

For the three months ended September 30, 2023, charges to income for environmental investigatory and remedial activities were $6.9 million compared to $7.4 million for the three months ended September 30, 2022. These charges related primarily to expected future investigatory and remedial activities associated with past manufacturing operations and former waste disposal sites.

For the three months ended September 30, 2023, other corporate and unallocated costs were $22.9 million compared to $27.5 million for the three months ended September 30, 2022, a decrease of $4.6 million. The decrease was primarily due to lower legal and legal-related settlement expenses ($6.1 million).

Nine Months Ended September 30, 2023 Compared to Nine Months Ended September 30, 2022

For the nine months ended September 30, 2023, charges to income for environmental investigatory and remedial activities were $23.1 million compared to $18.0 million for the nine months ended September 30, 2022. These charges related primarily to expected future investigatory and remedial activities associated with past manufacturing operations and former waste disposal sites.

For the nine months ended September 30, 2023, other corporate and unallocated costs were $79.6 million compared to $92.8 million for the nine months ended September 30, 2022, a decrease of $13.2 million. The decrease was primarily due to lower legal and legal-related settlement expenses ($11.6 million) and lower variable incentive compensation costs ($2.6 million), which includes mark-to-market adjustments on stock-based compensation expense.

Restructurings

As a result of weak global resin demand and higher cost structures within the European region, we began a review of our global Epoxy asset footprint to optimize the most productive and cost effective assets to support our strategic operating model.

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As part of this review, we announced operational cessations in the fourth quarter of 2022 and the first and second quarters of 2023 (collectively, Epoxy Optimization Plan). The foregoing actions will complete the rightsizing plan of our Epoxy business.

On June 20, 2023, we announced we had made the decision to cease all remaining operations at our Gumi, South Korea facility, reduce epoxy resin capacity at our Freeport, TX facility, and reduce our sales and support staffing across Asia. These actions are expected to be substantially completed by December 31, 2023. On March 21, 2023, we announced we had made the decision to cease operations at our cumene facility in Terneuzen, Netherlands and solid epoxy resin production at our facilities in Gumi, South Korea and Guaruja, Brazil. The closures were completed in the first quarter 2023. During the fourth quarter of 2022, we committed to and completed a plan to close down one of our BisA production lines at our Stade, Germany site. For the three and nine months ended September 30, 2023, we recorded restructuring charges of $8.6 million and $79.7 million, respectively, for the write-off of equipment and facility costs, employee severance and related benefit costs, contract termination costs and facility exit costs related to these actions. We expect to incur additional restructuring charges through 2026 of approximately $45 million related to these actions.

Outlook

We expect fourth quarter 2023 operating results to decline sequentially from third quarter 2023. We believe the challenging global conditions for our Chlor Alkali Products and Vinyls business are approaching a favorable inflection point and we plan to reduce our operating rates in the fourth quarter; thereby, reducing our market participation and accelerating the favorable inflection point. As a result, we expect our Chlor Alkali Products and Vinyls business results to decline in the fourth quarter. We expect our Epoxy business to continue to be challenged by European and North American demand weakness, aggravated by elevated Asian exports. We expect our Winchester business fourth quarter 2023 results to be similar to third quarter 2023.

Other Corporate and Unallocated costs in 2023 are expected to be lower than the $131.5 million in 2022.

During 2023, we anticipate environmental expenses in the $25 million to $30 million range, compared to $23.2 million in 2022.

We expect non-operating pension income in 2023 to be in the $23 million range compared to $38.7 million in 2022. Based on our plan assumptions and estimates, we will not be required to make any cash contributions to our domestic qualified defined benefit pension plan in 2023. We have several international qualified defined benefit pension plans for which we anticipate cash contributions of less than $5 million in 2023.

In 2023, we currently expect our capital spending to be in the $225 million to $250 million range and we expect to make payments under other long-term supply contracts in the $75 million to $100 million range for energy modernization on the U.S. Gulf Coast. We expect 2023 depreciation and amortization expense to be in the $535 million range.

We currently believe the 2023 effective tax rate will be in the 24% range and our cash tax rate to be in the 25% to 30% range.

Environmental Matters

Environmental provisions charged to income, which are included in costs of goods sold, were $6.9 million and $7.4 million for the three months ended September 30, 2023 and 2022, respectively, and were $23.1 million and $18.0 million for the nine months ended September 30, 2023 and 2022, respectively.

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Our liabilities for future environmental expenditures were as follows:

	September 30,
	2023		2022
	($ in millions)
Balance at beginning of year	$	146.6	$	147.3
Charges to income	23.1		18.0
Remedial and investigatory spending	(16.2)		(15.8)
Foreign currency translation adjustments	—		(0.2)
Balance at end of period	$	153.5	$	149.3

Environmental investigatory and remediation activities spending was associated with former waste disposal sites and past manufacturing operations. Spending in 2023 for investigatory and remedial efforts, the timing of which is subject to regulatory approvals and other uncertainties, is estimated to be approximately $25 million. Cash outlays for remedial and investigatory activities associated with former waste disposal sites and past manufacturing operations were not charged to income, but instead, were charged to reserves established for such costs identified and expensed to income in prior periods. Associated costs of investigatory and remedial activities are provided for in accordance with generally accepted accounting principles governing probability and the ability to reasonably estimate future costs. Our ability to estimate future costs depends on whether our investigatory and remedial activities are in preliminary or advanced stages. With respect to unasserted claims, we accrue liabilities for costs that, in our experience, we expect to incur to protect our interests against those unasserted claims. Our accrued liabilities for unasserted claims amounted to $8.9 million at September 30, 2023. With respect to asserted claims, we accrue liabilities based on remedial investigation, feasibility study, remedial action and operation, maintenance and monitoring (OM&M) expenses that, in our experience, we expect to incur in connection with the asserted claims. Required site OM&M expenses are estimated and accrued in their entirety for required periods not exceeding 30 years, which reasonably approximates the typical duration of long-term site OM&M. Charges to income for investigatory and remedial efforts may be material to our operating results in 2023.

The condensed balance sheets included reserves for future environmental expenditures to investigate and remediate known sites amounting to $153.5 million, $146.6 million and $149.3 million at September 30, 2023, December 31, 2022 and September 30, 2022, respectively, of which $128.5 million, $121.6 million and $124.3 million, respectively, were classified as other noncurrent liabilities. These amounts do not take into account any discounting of future expenditures or any consideration of insurance recoveries or advances in technology. These liabilities are reassessed periodically to determine if environmental circumstances have changed and/or remediation efforts and our estimate of related costs have changed. As a result of these reassessments, future charges to income may be made for additional liabilities.

Environmental exposures are difficult to assess for numerous reasons, including the identification of new sites, developments at sites resulting from investigatory studies, advances in technology, changes in environmental laws and regulations and their application, changes in regulatory authorities, the scarcity of reliable data pertaining to identified sites, the difficulty in assessing the involvement and financial capability of other Potentially Responsible Parties (PRPs), our ability to obtain contributions from other parties and the lengthy time periods over which site remediation occurs. It is possible that some of these matters (the outcomes of which are subject to various uncertainties) may be resolved unfavorably to us, which could materially adversely affect our financial position or results of operations.

Legal Matters and Contingencies

Discussion of legal matters and contingencies can be referred to under Item 1, within Note 17, “Commitments and Contingencies.”

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Liquidity and Capital Resources

Cash Flow Data

	Nine Months Ended September 30,
	2023		2022
Provided By (Used For)	($ in millions)
Net operating activities	$	557.7	$	1,509.7
Capital expenditures	(173.0)		(168.4)
Payments under other long-term supply contracts	(46.2)		—
Net investing activities	(194.0)		(153.5)
Long-term debt borrowings (repayments), net	206.6		(200.9)
Common stock repurchased and retired	(595.1)		(1,100.6)
Stock options exercised	22.3		21.3
Dividends paid	(76.6)		(89.4)
Contributions received from noncontrolling interests	44.1		—
Net financing activities	(398.7)		(1,369.6)

Operating Activities

For the nine months ended September 30, 2023, cash provided by operating activities decreased by $952.0 million from the nine months ended September 30, 2022, primarily due to a decrease in operating results and an increase in working capital compared with the prior year. For the nine months ended September 30, 2023, working capital increased $172.6 million compared to an increase of $15.7 million for the nine months ended September 30, 2022. A portion of the working capital increase reflects incremental working capital associated with BWA of approximately $65 million. Inventories increased by $43.4 million from December 31, 2022. Accounts payable and accrued liabilities decreased $222.7 million from December 31, 2022, primarily as a result of lower raw material and operating costs.

Investing Activities

Capital spending was $173.0 million for the nine months ended September 30, 2023 compared to $168.4 million for the corresponding period in 2022. For the total year 2023, we currently expect our capital spending to be in the $225 million to $250 million range. We expect 2023 depreciation and amortization expense to be in the $535 million range.

For the nine months ended September 30, 2023, payments under other long-term supply contracts was $46.2 million for energy modernization on the U.S. Gulf Coast and we expect to make payments for the total year 2023 in the $75 million to $100 million range.

For the nine months ended September 30, 2023, we received $28.5 million of cash proceeds for the sale of our domestic private trucking fleet and operations. For the nine months ended September 30, 2022, we received proceeds of $14.9 million for the sale of two former manufacturing facilities.

Financing Activities

For the nine months ended September 30, 2023, we had long-term debt borrowings, net of long-term debt repayments of $206.6 million. For the nine months ended September 30, 2022, we had long-term debt repayments, net of long-term debt borrowings of $200.9 million. During the nine months ended September 30, 2022, we repaid $200.0 million of the outstanding 5.50% senior notes (2022 Notes) which became due utilizing cash on hand.

For the nine months ended September 30, 2023 and 2022, 10.8 million and 20.8 million shares, respectively, of common stock were repurchased and retired at a total value of $595.1 million and $1,100.6 million, respectively.

We issued 0.8 million and 0.9 million shares representing stock options exercised for the nine months ended September 30, 2023 and 2022, respectively, with a total value of $22.3 million and $21.3 million, respectively.

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For the nine months ended September 30, 2023, we received $44.1 million of cash contributions from noncontrolling interests for BWA.

The percent of total debt to total capitalization increased to 54.1% as of September 30, 2023 from 50.4% as of December 31, 2022, primarily as a result of a higher level of debt outstanding, partially offset by lower shareholders’ equity, primarily due to common stock repurchases partially offset by our operating results.

In the first three quarters of 2023 and 2022, we paid a quarterly dividend of $0.20 per share. Dividends paid for the nine months ended September 30, 2023 and 2022, were $76.6 million and $89.4 million, respectively. On October 26, 2023, our Board of Directors declared a dividend of $0.20 per share on our common stock, payable on December 8, 2023 to shareholders of record on November 9, 2023.

The payment of cash dividends is subject to the discretion of our Board of Directors and will be determined in light of then-current conditions, including our earnings, our operations, our financial condition, our capital requirements and other factors deemed relevant by our Board of Directors. In the future, our Board of Directors may change our dividend policy, including the frequency or amount of any dividend, in light of then-existing conditions.

Liquidity and Other Financing Arrangements

Our principal sources of liquidity are from cash and cash equivalents, cash flow from operations and borrowings under our Senior Revolving Credit Facility, Receivables Financing Agreement and AR Facilities. Additionally, we believe that we have access to the high-yield debt and equity markets.

On October 11, 2022, we entered into a new $1,550.0 million senior credit facility (Senior Credit Facility) that replaced our previous senior credit facility (2021 Senior Credit Facility). The Senior Credit Facility includes a senior term loan facility with aggregate commitments of $350.0 million (Term Loan Facility) and a senior revolving credit facility with aggregate commitments of $1,200.0 million (Senior Revolving Credit Facility). The Term Loan Facility was fully drawn on the closing date with the proceeds of the Term Loan Facility used to refinance the loans and commitments outstanding under the 2021 Senior Credit Facility. The Term Loan Facility requires principal amortization amounts payable beginning March 31, 2023 at a rate of 0.625% per quarter through the end of 2024, increasing to 1.250% per quarter thereafter until maturity. The maturity date for the Senior Credit Facility is October 11, 2027.

The Senior Revolving Credit Facility includes a $100.0 million letter of credit subfacility. At September 30, 2023, we had $1,034.6 million available under our $1,200.0 million Senior Revolving Credit Facility because we had $165.0 million borrowed under the facility and issued $0.4 million of letters of credit.

We were in compliance with all covenants and restrictions under all our outstanding credit agreements as of September 30, 2023, and no event of default had occurred that would permit the lenders under our outstanding credit agreements to accelerate the debt if not cured. In the future, our ability to generate sufficient operating cash flows, among other factors, will determine the amounts available to be borrowed under these facilities. As a result of our restrictive covenant related to the net leverage ratio, the maximum additional borrowings available to us could be limited in the future. The limitation, if an amendment or waiver from our lenders is not obtained, could restrict our ability to borrow the maximum amounts available under the Senior Revolving Credit Facility and the Receivables Financing Agreement.  As of September 30, 2023, there were no covenants or other restrictions that limited our ability to borrow.

The overall decrease in cash for the nine months ended September 30, 2023 primarily reflects our share repurchases, capital spending, and dividends paid, partially offset by our debt borrowings, operating results and contributions from noncontrolling interests. We believe, based on current and projected levels of cash flow from our operations, together with our cash and cash equivalents on hand and the availability to borrow under our Senior Revolving Credit Facility, Receivables Financing Agreement and AR Facilities, we have sufficient liquidity to meet our short-term and long-term needs to make required payments of interest on our debt, fund our operating needs, working capital and our capital expenditure requirements, and comply with the financial ratios in our debt agreements.

On July 28, 2022, our Board of Directors authorized a share repurchase program for the purchase of shares of common stock at an aggregate price of up to $2.0 billion. This program will terminate upon the purchase of $2.0 billion of common stock.

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For the nine months ended September 30, 2023, 10.8 million shares of common stock have been repurchased and retired at a total value of $595.1 million. As of September 30, 2023, 16.7 million shares of common stock have been repurchased and retired at a total value of $887.9 million under the 2022 Repurchase Authorization program, and $1,112.1 million of common stock remained authorized to be repurchased under the program.

We maintain a $425.0 million Receivables Financing Agreement (Receivables Financing Agreement) that is scheduled to mature on October 14, 2025. Under the Receivables Financing Agreement, our eligible trade receivables are used for collateralized borrowings and continue to be serviced by us. In addition, the Receivables Financing Agreement incorporates the net leverage ratio covenant that is contained in the Senior Credit Facility. As of September 30, 2023, December 31, 2022 and September 30, 2022, we had $350.0 million, $300.0 million and $300.0 million, respectively, drawn under the agreement. As of September 30, 2023, $489.4 million of our trade receivables were pledged as collateral and we had $7.2 million of additional borrowing capacity under the Receivables Financing Agreement, which was limited by our borrowing base.

Olin also has trade accounts receivable factoring arrangements (AR Facilities) and pursuant to the terms of the AR Facilities, certain of our domestic subsidiaries may sell their accounts receivable up to a maximum of $175.5 million and certain of our foreign subsidiaries may sell their accounts receivable up to a maximum of €22.0 million. We will continue to service the outstanding accounts sold. These receivables qualify for sales treatment under ASC 860 and, accordingly, the proceeds are included in net cash provided by operating activities in the condensed statements of cash flows. The gross amount of receivables sold for the nine months ended September 30, 2023 and 2022 totaled $749.5 million and $769.3 million, respectively. The factoring discount paid under the AR Facilities is recorded as interest expense on the condensed statements of operations. The factoring discount was $1.3 million and $0.9 million for the three months ended September 30, 2023 and 2022, respectively, and $3.8 million and $1.8 million for the nine months ended September 30, 2023 and 2022, respectively. The agreements are without recourse and therefore no recourse liability has been recorded as of September 30, 2023, December 31, 2022 and September 30, 2022. As of September 30, 2023, December 31, 2022 and September 30, 2022, $72.7 million, $111.8 million and $91.3 million, respectively, of receivables qualifying for sales treatment were outstanding and will continue to be serviced by us.

At September 30, 2023, we had total letters of credit of $78.8 million outstanding, of which $0.4 million were issued under our Senior Revolving Credit Facility. The letters of credit were used to support certain long-term debt, certain workers compensation insurance policies, certain plant closure and post-closure obligations, certain international payment obligations and certain international pension funding requirements.

Our current debt structure is used to fund our business operations. As of September 30, 2023, we had long-term borrowings, including the current installment and finance lease obligations, of $2,790.1 million, of which $1,014.3 million were at variable rates. Included within long-term borrowings on the condensed balance sheets were deferred debt issuance costs and unamortized bond original issue discount of $17.6 million as of September 30, 2023. Commitments from banks under our Senior Revolving Credit Facility, Receivables Financing Agreement and AR Facilities are additional sources of liquidity.

Credit Ratings

We receive ratings from three independent credit rating agencies: Fitch Ratings (Fitch), Moody's Investor Service (Moody's) and Standard & Poor's (S&P). The following table summarizes our credit ratings as of September 30, 2023:

Credit Ratings	Long-term Rating	Outlook
Fitch Ratings	BBB-	Stable
Moody’s Investors Service	Ba1	Stable
Standard & Poor’s	BB+	Positive

On January 12, 2023, Fitch assigned a first-time inaugural rating of BBB- and a stable outlook. On June 30, 2023, Moody’s affirmed Olin’s Ba1 rating and stable outlook. On April 4, 2023, S&P affirmed Olin’s BB+ rating and positive outlook.

40

Contractual Obligations

Purchasing commitments are utilized in our normal course of business for our projected needs. We have supply contracts with various third parties for certain raw materials including ethylene, electricity, propylene and benzene. These agreements are maintained through long-term cost based contracts that provide us with a reliable supply of key raw materials.

There have been no material changes in our contractual obligations and commitments as disclosed in our Annual Report on Form 10-K for the year ended December 31, 2022 other than those which occur in the ordinary course of business.

New Accounting Pronouncements

Discussion of new accounting pronouncements can be referred to under Item 1, within Note 2, “Recent Accounting Pronouncements.”

Item 3. Quantitative and Qualitative Disclosures about Market Risk.

We are exposed to market risk in the normal course of our business operations due to our purchases of certain commodities, our ongoing investing and financing activities and our operations that use foreign currencies. The risk of loss can be assessed from the perspective of adverse changes in fair values, cash flows and future earnings. We have established policies and procedures governing our management of market risks and the use of financial instruments to manage exposure to such risks.

Energy costs, including electricity and natural gas, and certain raw materials used in our production processes are subject to price volatility. Depending on market conditions, we may enter into futures contracts, forward contracts, commodity swaps and put and call option contracts in order to reduce the impact of commodity price fluctuations. As of September 30, 2023, we maintained open positions on commodity contracts with a notional value totaling $207.5 million ($261.2 million at December 31, 2022 and $272.1 million at September 30, 2022). Assuming a hypothetical 10% increase in commodity prices which are currently hedged, as of September 30, 2023, we would experience a $20.8 million ($26.1 million at December 31, 2022 and $27.2 million at September 30, 2022) increase in our cost of inventory purchased, which would be substantially offset by a corresponding increase in the value of related hedging instruments.

We transact business in various foreign currencies other than the USD which exposes us to movements in exchange rates which may impact revenue and expenses, assets and liabilities and cash flows. Our significant foreign currency exposure is denominated with European currencies, primarily the Euro, although exposures also exist in other currencies of Asia Pacific, Latin America, Middle East and Africa. For all derivative positions, we evaluated the effects of a 10% shift in exchange rates between those currencies and the USD, holding all other assumptions constant. Unfavorable currency movements of 10% would negatively affect the fair values of the derivatives held to hedge currency exposures by $15.0 million. These unfavorable changes would generally have been offset by favorable changes in the values of the underlying exposures.

We are exposed to changes in interest rates primarily as a result of our investing and financing activities. Our current debt structure is used to fund business operations, and commitments from banks under our Senior Revolving Credit Facility, Receivables Financing Agreement and AR Facilities are additional sources of liquidity. As of September 30, 2023, December 31, 2022 and September 30, 2022, we had long-term borrowings, including current installments and finance lease obligations, of $2,790.1 million, $2,580.7 million and $2,581.4 million, respectively, of which $1,014.3 million, $805.9 million and $805.9 million at September 30, 2023, December 31, 2022 and September 30, 2022, respectively, were issued at variable rates. Included within long-term borrowings on the condensed balance sheets were deferred debt issuance costs and unamortized bond original issue discount.

Assuming no changes in the $1,014.3 million of variable-rate debt levels from September 30, 2023, we estimate that a hypothetical change of 100-basis points in the secured overnight financing rate (SOFR) would impact annual interest expense by $10.1 million.

If the actual changes in commodities, foreign currency, or interest pricing is substantially different than expected, the net impact of commodity risk, foreign currency risk, or interest rate risk on our cash flow may be materially different than that disclosed above.

We do not enter into any derivative financial instruments for speculative purposes.

41

Item 4. Controls and Procedures.

Our chief executive officer and our chief financial officer evaluated the effectiveness of our disclosure controls and procedures as of September 30, 2023. Based on that evaluation, our chief executive officer and chief financial officer have concluded that, as of such date, our disclosure controls and procedures were effective to ensure that information Olin is required to disclose in the reports that it files or submits with the SEC under the Securities Exchange Act of 1934 is recorded, processed, summarized and reported within the time periods specified in the Commission’s rules and forms, and to ensure that information we are required to disclose in such reports is accumulated and communicated to our management, including our chief executive officer and chief financial officer, as appropriate to allow timely decisions regarding required disclosure.

There have been no changes in our internal control over financial reporting that occurred during the quarter ended September 30, 2023, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Cautionary Statement Regarding Forward-Looking Statements

This quarterly report on Form 10-Q includes forward-looking statements. These statements relate to analyses and other information that are based on management’s beliefs, certain assumptions made by management, forecasts of future results, and current expectations, estimates and projections about the markets and economy in which we and our various segments operate. The statements contained in this quarterly report on Form 10-Q that are not statements of historical fact may include forward-looking statements that involve a number of risks and uncertainties.

We have used the words “anticipate,” “intend,” “may,” “expect,” “believe,” “should,” “plan,” “outlook,” “project,” “estimate,” “forecast,” “optimistic,” “target,” and variations of such words and similar expressions in this quarterly report to identify such forward-looking statements. These forward-looking statements include, but are not limited to, statements regarding the Company’s intent to repurchase, from time to time, the Company’s common stock. These statements are not guarantees of future performance and involve certain risks, uncertainties and assumptions, which are difficult to predict and many of which are beyond our control. Therefore, actual outcomes and results may differ materially from those matters expressed or implied in such forward-looking statements. We undertake no obligation to update publicly any forward-looking statements, whether as a result of future events, new information or otherwise. The payment of cash dividends is subject to the discretion of our Board of Directors and will be determined in light of then-current conditions, including our earnings, our operations, our financial conditions, our capital requirements and other factors deemed relevant by our Board of Directors. In the future, our Board of Directors may change our dividend policy, including the frequency or amount of any dividend, in light of then-existing conditions.

The risks, uncertainties and assumptions involved in our forward-looking statements, many of which are discussed in more detail in our filings with the SEC, including without limitation the “Risk Factors” section of our Annual Report on Form 10-K for the year ended December 31, 2022, and our Quarterly Reports on Form 10-Q and other reports furnished or filed with the SEC, include, but are not limited to, the following:

Business, Industry and Operational Risks

•sensitivity to economic, business and market conditions in the United States and overseas, including economic instability or a downturn in the sectors served by us;

•declines in average selling prices for our products and the supply/demand balance for our products, including the impact of excess industry capacity or an imbalance in demand for our chlor alkali products;

•unsuccessful execution of our strategic operating model, which prioritizes Electrochemical Unit (ECU) margins over sales volumes;

•failure to control costs and inflation impacts or failure to achieve targeted cost reductions;

•our reliance on a limited number of suppliers for specified feedstock and services and our reliance on third-party transportation;

42

•the occurrence of unexpected manufacturing interruptions and outages, including those occurring as a result of labor disruptions, production hazards and weather-related events;

•availability of and/or higher-than-expected costs of raw material, energy, transportation, and/or logistics;

•the failure or an interruption of our information technology systems;

•failure to identify, attract, develop, retain and motivate qualified employees throughout the organization;

•our inability to complete future acquisitions or joint venture transactions or successfully integrate them into our business;

•risks associated with our international sales and operations, including economic, political or regulatory changes;

•the negative impact from a public health crisis, such as a pandemic, endemic or outbreak of infectious disease, including the COVID-19 pandemic and the global response to the pandemic, including without limitation adverse impacts in complying with governmental mandates; 

•our indebtedness and debt service obligations;

•weak industry conditions affecting our ability to comply with the financial maintenance covenants in our senior credit facility;

•adverse conditions in the credit and capital markets, limiting or preventing our ability to borrow or raise capital;

•the effects of any declines in global equity markets on asset values and any declines in interest rates or other significant assumptions used to value the liabilities in, and funding of, our pension plans;

•our long-range plan assumptions not being realized causing a non-cash impairment charge of long-lived assets;

Legal, Environmental and Regulatory Risks

•changes in, or failure to comply with, legislation or government regulations or policies, including changes regarding our ability to manufacture or use certain products and changes within the international markets in which we operate;

•new regulations or public policy changes regarding the transportation of hazardous chemicals and the security of chemical manufacturing facilities;

•unexpected outcomes from legal or regulatory claims and proceedings;

•costs and other expenditures in excess of those projected for environmental investigation and remediation or other legal proceedings;

•various risks associated with our Lake City U.S. Army Ammunition Plant contract and performance under other governmental contracts; and

•failure to effectively manage environmental, social and governance (ESG) issues and related regulations, including climate change and sustainability.

All of our forward-looking statements should be considered in light of these factors. In addition, other risks and uncertainties not presently known to us or that we consider immaterial could affect the accuracy of our forward-looking statements.

43

Part II — Other Information

Item 1. Legal Proceedings.

Discussion of legal matters and contingencies can be referred to under Item 1, within Note 17, “Commitments and Contingencies.”

Item 1A. Risk Factors.

Not Applicable.

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

(a)    Not Applicable.

(b)    Not Applicable.

(c)

Issuer Purchases of Equity Securities

Period	Total Number of Shares (or Units) Purchased(1)	Average Price Paid per Share (or Unit)(2)		Total Number of Shares (or Units) Purchased as Part of Publicly Announced Plans or Programs	Maximum Dollar Value of Shares (or Units) that May Yet Be Purchased Under the Plans or Programs
July 1-31, 2023	1,139,753	$	54.21	1,139,753
August 1-31, 2023	1,296,083	$	57.28	1,296,083
September 1-30, 2023	1,276,244	$	50.19	1,276,244
Total					$	1,112,091,759	(1)

(1)On July 28, 2022, our Board of Directors authorized a share repurchase program for the purchase of shares of common stock at an aggregate price of up to $2.0 billion (the 2022 Repurchase Authorization). This program will terminate upon the purchase of $2.0 billion of common stock. Through September 30, 2023, 16,748,302 shares of common stock had been repurchased and retired at a total value of $887,908,241 and $1,112,091,759 of common stock remained available for purchase under the 2022 Repurchase Authorization program.

(2)Average price paid per share includes transaction costs including commissions and fees paid to acquire the shares and excludes costs accrued associated with 1% excise tax on the fair market value of stock repurchases.

Item 3. Defaults Upon Senior Securities.

Not Applicable.

Item 4. Mine Safety Disclosures.

Not Applicable.

Item 5. Other Information.

(a)    Not Applicable.

(b)    Not Applicable.

(c)    During the three months ended September 30, 2023, no director or officer of Olin adopted, terminated or modified a ‘Rule 10b5-1 trading arrangement’ or ‘non-Rule 10b5-1 trading arrangement,’ as each term is defined in Item 408(a) of Regulation S-K.

44

Item 6. Exhibits.

Exhibit	Exhibit Description
31.1	Section 302 Certification Statement of Chief Executive Officer
31.2	Section 302 Certification Statement of Chief Financial Officer
32	Section 906 Certification Statement of Chief Executive Officer and Chief Financial Officer
101.INS	XBRL Instance Document (the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the XBRL document)
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document
104	Cover Page Interactive Data File (embedded in the Exhibit 101 Interactive Data Files)
*Previously filed as indicated and incorporated herein by reference.  Exhibits incorporated by reference are located in SEC file No. 1-1070 unless otherwise indicated.

45

SIGNATURES

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

OLIN CORPORATION
(Registrant)
By:	/s/ Todd A. Slater
	Senior Vice President and Chief Financial Officer (Authorized Officer)

Date: October 27, 2023

46

EX-31.1

Exhibit 31.1

CERTIFICATIONS

I, Scott Sutton, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Olin Corporation;

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:	October 27, 2023	/s/ Scott Sutton
		Scott Sutton
		Chairman, President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATIONS

I, Todd A. Slater, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Olin Corporation;

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:	October 27, 2023	/s/ Todd A. Slater
		Todd A. Slater
		Senior Vice President and Chief Financial Officer

EX-32

Exhibit 32

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED

PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Olin Corporation (the “Company”) on Form 10-Q for the period ended September 30, 2023 as filed with the Securities and Exchange Commission (the “Report”), I, Scott Sutton, Chairman, President and Chief Executive Officer and I, Todd A. Slater, Vice President and Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to our knowledge: (1) the Report fully complies with the requirements of Section 13(a) of the Securities Exchange Act of 1934; and (2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its Staff upon request.

/s/ Scott Sutton
Scott Sutton
Chairman, President and Chief Executive Officer
Dated:	October 27, 2023
/s/ Todd A. Slater
Todd A. Slater
Senior Vice President and Chief Financial Officer
Dated:	October 27, 2023

XML

Document And Entity Information	9 Months Ended
	Sep. 30, 2023 shares
Cover [Abstract]
Entity Registrant Name	Olin Corporation
Entity Central Index Key	0000074303
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Document Transition Report	false
Entity File Number	1-1070
Entity Incorporation, State or Country Code	VA
Entity Tax Identification Number	13-1872319
Entity Address, Address Line One	190 Carondelet Plaza,
Entity Address, Address Line Two	Suite 1530,
Entity Address, City or Town	Clayton,
Entity Address, State or Province	MO
Entity Address, Postal Zip Code	63105
City Area Code	314
Local Phone Number	480-1400
Title of 12(b) Security	Common Stock, $1.00 par value per share
Trading Symbol	OLN
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	122,549,597

XML

Condensed Balance Sheets - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Current assets:
Cash and cash equivalents	$ 158.3	$ 194.0	$ 163.6
Receivables, net	894.2	924.6	1,075.4
Income taxes receivable	28.0	43.2	26.0
Inventories, net	977.7	941.9	945.1
Other current assets	42.8	52.7	74.9
Total current assets	2,101.0	2,156.4	2,285.0
Property, plant and equipment (less accumulated depreciation of $4,724.6, $4,413.1 and $4,296.5)	2,490.2	2,674.1	2,690.8
Operating lease assets, net	331.0	356.0	371.4
Deferred income taxes	106.1	60.5	81.9
Other assets	1,117.3	1,102.5	1,090.7
Intangible assets, net	248.6	273.8	279.2
Goodwill	1,421.0	1,420.9	1,421.2
Total assets	7,815.2	8,044.2	8,220.2
Current liabilities:
Current installments of long-term debt	78.9	9.7	1.0
Accounts payable	717.6	837.7	892.6
Income taxes payable	171.5	133.4	183.2
Current operating lease liabilities	68.3	71.8	74.3
Accrued liabilities	361.0	508.8	467.6
Total current liabilities	1,397.3	1,561.4	1,618.7
Long-term debt	2,711.2	2,571.0	2,580.4
Operating lease liabilities	270.4	292.5	305.1
Accrued pension liability	212.7	234.5	286.3
Deferred income taxes	500.7	507.3	546.8
Other liabilities	355.4	333.9	333.2
Total liabilities	5,447.7	5,500.6	5,670.5
Commitments and contingencies
Shareholders’ equity:
Common stock, $1.00 par value per share:  authorized, 240.0 shares; issued and outstanding, 122.5, 132.3 and 137.0 shares	122.5	132.3	137.0
Additional paid-in capital	130.1	682.7	920.3
Accumulated Other Comprehensive Income (Loss), Net of Tax, Total	(480.3)	(495.9)	(562.3)
Retained earnings	2,555.2	2,224.5	2,054.7
Olin Corporation’s shareholders’ equity	2,327.5	2,543.6	2,549.7
Stockholders' Equity Attributable to Noncontrolling Interest, Total	40.0	0.0	0.0
Total equity	2,367.5	2,543.6	2,549.7
Total liabilities and equity	$ 7,815.2	$ 8,044.2	$ 8,220.2

XML

Condensed Balance Sheets Parenthetical - USD ($) shares in Millions, $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Assets
Accumulated depreciation	$ 4,724.6	$ 4,413.1	$ 4,296.5
Shareholders' equity:
Common stock, par value	$ 1.00	$ 1.00	$ 1.00
Common stock, authorized (in shares)	240.0	240.0	240.0
Common stock, issued	122.5	132.3	137.0
Common stock, outstanding	122.5	132.3	137.0

XML

Condensed Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Sales	$ 1,671.4	$ 2,321.7	$ 5,218.4	$ 7,399.2
Operating expenses:
Cost of goods sold	1,402.3	1,840.9	4,236.6	5,599.8
Selling and administration	90.9	92.7	303.9	296.0
Restructuring charges	11.9	7.6	92.0	14.3
Other operating (expense) income	(0.3)	13.0	27.2	16.3
Operating income	166.0	393.5	613.1	1,505.4
Interest expense	46.2	36.0	133.9	103.4
Interest income	1.0	0.5	3.2	1.2
Non-operating pension income	5.9	9.9	17.0	29.0
Income before taxes	126.7	367.9	499.4	1,432.2
Income tax provision	22.2	52.7	96.2	301.9
Net income	104.5	315.2	403.2	1,130.3
Net income (loss) attributable to noncontrolling interests	0.4	0.0	(4.1)	0.0
Net income attributable to Olin Corporation	$ 104.1	$ 315.2	$ 407.3	$ 1,130.3
Net income attributable to Olin Corporation per common share:
Basic	$ 0.84	$ 2.23	$ 3.19	$ 7.62
Diluted	$ 0.82	$ 2.18	$ 3.12	$ 7.44
Average common shares outstanding:
Basic	124.2	141.2	127.5	148.3
Diluted	127.0	144.3	130.6	151.9

XML

Condensed Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net income	$ 104.5	$ 315.2	$ 403.2	$ 1,130.3
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(3.3)	(25.1)	(6.3)	(61.6)
Gains (losses) on derivative contracts, net	6.2	(8.7)	21.0	(33.0)
Amortization of prior service costs and actuarial losses, net	0.2	7.0	0.9	20.3
Total other comprehensive income (loss), net of tax	3.1	(26.8)	15.6	(74.3)
Comprehensive income	107.6	288.4	418.8	1,056.0
Comprehensive income (loss) attributable to noncontrolling interests	0.4	0.0	(4.1)	0.0
Comprehensive income attributable to Olin Corporation	$ 107.2	$ 288.4	$ 422.9	$ 1,056.0

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Condensed Statements of Shareholders' Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Noncontrolling Interest
Balance at beginning of period at Dec. 31, 2021		$ 156.8	$ 1,969.6	$ (488.0)	$ 1,013.8
Common stock repurchased and retired	$ (1,100.6)	(20.8)	(1,079.8)
Stock Issued During Period, Value, Stock Options Exercised	21.3	0.9	20.4
Common stock issued for other transactions		0.1	3.1
Stock-based compensation			7.0
Other comprehensive income (loss)	(74.3)			(74.3)
Net income	1,130.3				1,130.3
Common stock dividends paid					(89.4)
Balance at end of period at Sep. 30, 2022	2,549.7	$ 137.0	920.3	(562.3)	2,054.7
Balance at beginning of period at Dec. 31, 2021						$ 0.0
Net income (loss) attributable to noncontrolling interests	0.0					0.0
Contributions received from noncontrolling interests	0.0					0.0
Balance at end of period at Sep. 30, 2022	0.0					0.0
Dividends declared per share of common stock		$ 0.60
Balance at beginning of period at Jun. 30, 2022		$ 145.1	1,318.5	(535.5)	1,768.0
Common stock repurchased and retired		(8.2)	(402.7)
Stock Issued During Period, Value, Stock Options Exercised		0.0	0.4
Common stock issued for other transactions		0.1	0.1
Stock-based compensation			4.0
Other comprehensive income (loss)	(26.8)			(26.8)
Net income	315.2				315.2
Common stock dividends paid					(28.5)
Balance at end of period at Sep. 30, 2022	2,549.7	$ 137.0	920.3	(562.3)	2,054.7
Balance at beginning of period at Jun. 30, 2022						0.0
Net income (loss) attributable to noncontrolling interests	0.0					0.0
Contributions received from noncontrolling interests						0.0
Balance at end of period at Sep. 30, 2022	0.0					0.0
Dividends declared per share of common stock		$ 0.20
Total equity	2,549.7
Total equity	2,543.6
Balance at beginning of period at Dec. 31, 2022	2,543.6	$ 132.3	682.7	(495.9)	2,224.5
Common stock repurchased and retired	(595.1)	(10.8)	(584.3)
Stock Issued During Period, Value, Stock Options Exercised	22.3	0.8	21.5
Common stock issued for other transactions		0.2	1.6
Stock-based compensation			8.6
Other comprehensive income (loss)	15.6			15.6
Net income	403.2				407.3
Common stock dividends paid					(76.6)
Balance at end of period at Sep. 30, 2023	2,327.5	$ 122.5	130.1	(480.3)	2,555.2
Balance at beginning of period at Dec. 31, 2022	0.0					0.0
Net income (loss) attributable to noncontrolling interests	(4.1)					(4.1)
Contributions received from noncontrolling interests	44.1					44.1
Balance at end of period at Sep. 30, 2023	40.0					40.0
Dividends declared per share of common stock		$ 0.60
Balance at beginning of period at Jun. 30, 2023		$ 125.8	313.7	(483.4)	2,475.9
Common stock repurchased and retired		(3.7)	(198.3)
Stock Issued During Period, Value, Stock Options Exercised		0.4	9.9
Common stock issued for other transactions		0.0	0.1
Stock-based compensation			4.7
Other comprehensive income (loss)	3.1			3.1
Net income	104.5				104.1
Common stock dividends paid					(24.8)
Balance at end of period at Sep. 30, 2023	2,327.5	$ 122.5	$ 130.1	$ (480.3)	$ 2,555.2
Balance at beginning of period at Jun. 30, 2023						39.6
Net income (loss) attributable to noncontrolling interests	0.4					0.4
Contributions received from noncontrolling interests						0.0
Balance at end of period at Sep. 30, 2023	40.0					$ 40.0
Dividends declared per share of common stock		$ 0.20
Total equity	$ 2,367.5

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Condensed Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Operating Activities
Net income	$ 403.2	$ 1,130.3
Gains on disposition of property, plant and equipment	(27.0)	(13.0)
Adjustments to reconcile net income to net cash and cash equivalents provided by (used for) operating activities:
Stock-based compensation	13.2	10.4
Depreciation and amortization	404.9	450.3
Deferred income taxes	(60.6)	(3.7)
Write-off of equipment and facility included in restructuring charges	17.7	0.0
Qualified pension plan contributions	(1.6)	(0.9)
Qualified pension plan income	(15.0)	(24.7)
Change in:
Receivables	28.4	(25.8)
Income taxes receivable/payable	55.3	75.5
Inventories	(43.4)	(102.9)
Other current assets	9.8	5.8
Accounts payable and accrued liabilities	(222.7)	31.7
Other assets	(27.2)	(17.5)
Other noncurrent liabilities	29.5	(9.1)
Other operating activities	(6.8)	3.3
Net operating activities	557.7	1,509.7
Investing Activities
Capital expenditures	(173.0)	(168.4)
Payments under other long-term supply contracts	(46.2)	0.0
Proceeds from disposition of property, plant and equipment	28.8	14.9
Other investing activities	(3.6)	0.0
Net investing activities	(194.0)	(153.5)
Long-term debt:
Borrowings	587.7	215.0
Repayments	(381.1)	(415.9)
Common stock repurchased and retired	(595.1)	(1,100.6)
Stock options exercised	22.3	21.3
Dividends paid	(76.6)	(89.4)
Contributions received from noncontrolling interests	44.1	0.0
Net financing activities	(398.7)	(1,369.6)
Effect of exchange rate changes on cash and cash equivalents	(0.7)	(3.5)
Net decrease in cash and cash equivalents	(35.7)	(16.9)
Cash and cash equivalents, beginning of year	194.0	180.5
Cash and cash equivalents, end of period	158.3	163.6
Cash paid for interest and income taxes:
Interest, net	148.9	122.1
Income taxes, net of refunds	81.9	213.0
Non-cash investing activities:
Decrease in capital expenditures included in accounts payable and accrued liabilities	$ 17.9	$ 12.0

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DESCRIPTION OF BUSINESS

9 Months Ended

Sep. 30, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

DESCRIPTION OF BUSINESS

NOTE 1. DESCRIPTION OF BUSINESS

Olin Corporation (Olin) is a Virginia corporation, incorporated in 1892, having its principal executive offices in Clayton, MO. We are a leading vertically-integrated global manufacturer and distributor of chemical products and a leading U.S. manufacturer of ammunition. Our operations are concentrated in three business segments: Chlor Alkali Products and Vinyls, Epoxy and Winchester. All of our business segments are capital intensive manufacturing businesses. The Chlor Alkali Products and Vinyls segment manufactures and sells chlorine and caustic soda, ethylene dichloride and vinyl chloride monomer, methyl chloride, methylene chloride, chloroform, carbon tetrachloride, perchloroethylene, hydrochloric acid, hydrogen, bleach products and potassium hydroxide. The Epoxy segment produces and sells a full range of epoxy materials and precursors, including aromatics (acetone and phenol), allyl chloride, epichlorohydrin, liquid epoxy resins, solid epoxy resins and systems and growth products such as converted epoxy resins and additives. The Winchester segment produces and sells sporting ammunition, reloading components, small caliber military ammunition and components, industrial cartridges and clay targets.

On January 10, 2023, Blue Water Alliance (BWA), our joint venture with Mitsui & Co., Ltd. (Mitsui), began operations after receiving all necessary regulatory approvals. BWA is an independent global trader of ECU-based derivatives, focused on globally traded caustic soda and ethylene dichloride. Olin holds 51% interest and exercises control in BWA and the joint venture is consolidated in our consolidated financial statements with Mitsui’s 49% interest in BWA classified as noncontrolling interest. All intercompany accounts and transactions are eliminated in consolidation.

We have prepared the condensed financial statements included herein, without audit, pursuant to the rules and regulations of the United States (U.S.) Securities and Exchange Commission (SEC). The preparation of the financial statements requires estimates and assumptions that affect amounts reported and disclosed in the financial statements and related notes. In our opinion, these financial statements reflect all adjustments (consisting only of normal accruals), which are necessary to present fairly the results for interim periods. Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles have been condensed or omitted pursuant to such rules and regulations; however, we believe that the disclosures are appropriate. We recommend that you read these condensed financial statements in conjunction with the financial statements, accounting policies and the notes thereto and Management’s Discussion and Analysis of Financial Condition and Results of Operations included in our Annual Report on Form 10-K for the year ended December 31, 2022.

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RECENT ACCOUNTING PRONOUNCEMENTS	9 Months Ended
	Sep. 30, 2023
Accounting Standards Update and Change in Accounting Principle [Abstract]
RECENT ACCOUNTING PRONOUNCEMENTS	NOTE 2. RECENT ACCOUNTING PRONOUNCEMENTS We do not believe that any recently issued effective pronouncements, or pronouncements issued but not yet effective, if adopted, would have a material effect on the accompanying condensed financial statements.

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RESTRUCTURING CHARGES

9 Months Ended

Sep. 30, 2023

Restructuring and Related Activities [Abstract]

RESTRUCTURING CHARGES

NOTE 3. RESTRUCTURING CHARGES

As a result of weak global resin demand and higher cost structures within the European region, we began a review of our global Epoxy asset footprint to optimize the most productive and cost effective assets to support our strategic operating model. As part of this review we announced operational cessations in the fourth quarter of 2022 and the first and second quarters of 2023 (collectively, Epoxy Optimization Plan). The foregoing actions will complete the rightsizing plan of our Epoxy business.

On June 20, 2023, we announced we had made the decision to cease all remaining operations at our Gumi, South Korea facility, reduce epoxy resin capacity at our Freeport, TX facility, and reduce our sales and support staffing across Asia. These actions are expected to be substantially completed by December 31, 2023. On March 21, 2023, we announced we had made the decision to cease operations at our cumene facility in Terneuzen, Netherlands and solid epoxy resin production at our facilities in Gumi, South Korea and Guaruja, Brazil. The closures were completed in the first quarter 2023. During the fourth quarter of 2022, we committed to and completed a plan to close down one of our bisphenol production lines at our Stade, Germany site. For the three and nine months ended September 30, 2023, we recorded restructuring charges of $8.6 million and $79.7 million, respectively, for the write-off of equipment and facility costs, employee severance and related benefit costs, contract

termination costs and facility exit costs related to these actions. We expect to incur additional restructuring charges through 2026 of approximately $45 million related to these actions.

During 2021, we announced that we had made the decision to permanently close our diaphragm-grade chlor alkali capacity, representing 400,000 tons, at our McIntosh, AL facility (McIntosh Plan). The closure was completed during third quarter of 2022. For the three months ended September 30, 2023 and 2022, we recorded restructuring charges of $0.7 million and $5.5 million, respectively, for lease and other contract termination costs, facility exit costs, and for the write-off of equipment and facility costs related to this action. For the nine months ended September 30, 2023 and 2022, we recorded restructuring charges of $4.6 million and $7.1 million, respectively, for lease and other contract termination costs, facility exit costs, and for the write-off of equipment and facility costs related to this action. We expect to incur additional restructuring charges through 2027 of approximately $25 million related to these actions.

On January 18, 2021, we announced we had made the decision to permanently close our trichloroethylene and anhydrous hydrogen chloride liquefaction facilities in Freeport, TX (collectively, Freeport 2021 Plan), which were completed in the fourth quarter of 2021. For the three months ended September 30, 2023 and 2022, we recorded restructuring charges of $0.7 million and $0.4 million, respectively, for facility exit costs related to these actions. For the nine months ended September 30, 2023 and 2022, we recorded restructuring charges of $2.8 million and $1.9 million, respectively, for facility exit costs related to these actions. We expect to incur additional restructuring charges through 2025 of approximately $15 million related to these actions.

On December 11, 2019, we announced that we had made the decision to permanently close a chlor alkali plant with a capacity of 230,000 tons and our vinylidene chloride (VDC) production facility, both in Freeport, TX (collectively, Freeport 2019 Plan).  The VDC facility and related chlor alkali plant were closed during the fourth quarter of 2020 and second quarter of 2021, respectively. For the three months ended September 30, 2023 and 2022, we recorded restructuring charges of $1.9 million and $1.7 million, respectively, for facility exit costs related to these actions. For the nine months ended September 30, 2023 and 2022, we recorded restructuring charges of $4.9 million and $4.9 million, respectively, for facility exit costs related to these actions. We expect to incur additional restructuring charges through 2026 of approximately $25 million related to these actions.

On March 21, 2016, we announced that we had made the decision to close a combined total of 433,000 tons of chlor alkali capacity across three separate locations (collectively, Chlor Alkali 2016 Plan). For the nine months ended September 30, 2022, we recorded restructuring charges of $0.4 million, respectively, for facility exit costs and lease and other contract termination costs related to these actions. We do not expect to incur additional restructuring charges related to these capacity reductions.

The following table summarizes the 2023 and 2022 activities by major component of these restructuring actions and the remaining balances of accrued restructuring costs as of September 30, 2023 and 2022:

	Employee severance and related benefit costs		Lease and other contract termination costs		Facility exit costs		Write-off of equipment and facility		Total
	($ in millions)
Balance at January 1, 2022	$	6.9	$	5.4	$	—	$	—	$	12.3
Restructuring charges:
First quarter	—		0.1		2.6		0.4		3.1
Second quarter	—		0.2		3.1		0.3		3.6
Third quarter	—		—		4.9		2.7		7.6
Amounts utilized	(4.3)		(1.3)		(10.6)		(3.4)		(19.6)
Balance at September 30, 2022	$	2.6	$	4.4	$	—	$	—	$	7.0
Balance at January 1, 2023	$	9.4	$	4.2	$	—	$	—	$	13.6
Restructuring charges:
First quarter	—		39.7		8.4		12.8		60.9
Second quarter	3.3		1.7		9.3		4.9		19.2
Third quarter	2.6		2.0		7.3		—		11.9
Amounts utilized	(3.4)		(13.4)		(25.0)		(17.7)		(59.5)
Balance at September 30, 2023	$	11.9	$	34.2	$	—	$	—	$	46.1

The following table summarizes the cumulative restructuring charges of these restructuring actions by major component through September 30, 2023:

	Chlor Alkali Products and Vinyls								Epoxy		Corporate/other		Total
	McIntosh Plan		Freeport 2021 Plan		Freeport 2019 Plan		Chlor Alkali 2016 Plan		Epoxy Optimization Plan		Productivity Plan
	($ in millions)
Write-off of equipment and facility	$	2.7	$	—	$	58.9	$	78.1	$	18.3	$	—	$	158.0
Employee severance and related benefit costs	—		—		2.1		6.7		13.3		10.3		32.4
Facility exit costs	9.4		11.9		16.5		53.2		12.7		—		103.7
Employee relocation costs	—		—		—		1.7		—		—		1.7
Lease and other contract termination costs	6.4		—		—		43.0		43.4		—		92.8
Total cumulative restructuring charges	$	18.5	$	11.9	$	77.5	$	182.7	$	87.7	$	10.3	$	388.6

As of September 30, 2023, we have incurred cash expenditures of $184.5 million and non-cash charges of $158.0 million related to these restructuring actions. The remaining balance of $46.1 million is expected to be paid out through 2028.

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EARNINGS PER SHARE

9 Months Ended

Sep. 30, 2023

Earnings Per Share [Abstract]

EARNINGS PER SHARE

NOTE 4. EARNINGS PER SHARE

Basic and diluted net income attributable to Olin Corporation per share are computed by dividing net income attributable to Olin Corporation by the weighted-average number of common shares outstanding. Diluted net income attributable to Olin Corporation per share reflects the dilutive effect of stock-based compensation.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Computation of Net Income per Share	(In millions, except per share data)
Net income	$	104.5	$	315.2	$	403.2	$	1,130.3
Net income (loss) attributable to noncontrolling interests	0.4		—		(4.1)		—
Net income attributable to Olin Corporation	$	104.1	$	315.2	$	407.3	$	1,130.3
Basic shares	124.2		141.2		127.5		148.3
Basic net income attributable to Olin Corporation per share	$	0.84	$	2.23	$	3.19	$	7.62
Diluted shares:
Basic shares	124.2		141.2		127.5		148.3
Stock-based compensation	2.8		3.1		3.1		3.6
Diluted shares	127.0		144.3		130.6		151.9
Diluted net income attributable to Olin Corporation per share	$	0.82	$	2.18	$	3.12	$	7.44

The computation of dilutive shares does not include 1.3 million shares for both the three and nine months ended September 30, 2023 and 0.7 million shares for both the three and nine months ended September 30, 2022, as their effect would have been anti-dilutive.

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ACCOUNTS RECEIVABLES

9 Months Ended

Sep. 30, 2023

Receivables [Abstract]

ACCOUNTS RECEIVABLE

NOTE 5. ACCOUNTS RECEIVABLES

We maintain a $425.0 million Receivables Financing Agreement (Receivables Financing Agreement) that is scheduled to mature on October 14, 2025. Under the Receivables Financing Agreement, our eligible trade receivables are used for collateralized borrowings and continue to be serviced by us. In addition, the Receivables Financing Agreement incorporates the net leverage ratio covenant that is contained in the $1,550.0 million Senior Credit Facility. As of September 30, 2023, December 31, 2022 and September 30, 2022, we had $350.0 million, $300.0 million and $300.0 million, respectively, drawn under the agreement. As of September 30, 2023, $489.4 million of our trade receivables were pledged as collateral and we had $7.2 million of additional borrowing capacity under the Receivables Financing Agreement, which was limited by our borrowing base.

Olin also has trade accounts receivable factoring arrangements (AR Facilities) and pursuant to the terms of the AR Facilities, certain of our domestic subsidiaries may sell their accounts receivable up to a maximum of $175.5 million and certain of our foreign subsidiaries may sell their accounts receivable up to a maximum of €22.0 million. We will continue to service the outstanding accounts sold.  These receivables qualify for sales treatment under ASC 860 “Transfers and Servicing” and, accordingly, the proceeds are included in net cash provided by operating activities in the condensed statements of cash flows.  The following table summarizes the AR Facilities activity:

	September 30,
	2023		2022
	($ in millions)
Balance at beginning of year	$	111.8	$	83.3
Gross receivables sold	749.5		769.3
Payments received from customers on sold accounts	(788.6)		(761.3)
Balance at end of period	$	72.7	$	91.3

The factoring discount paid under the AR Facilities is recorded as interest expense on the condensed statements of operations. The factoring discount was $1.3 million and $0.9 million for the three months ended September 30, 2023 and 2022, respectively, and $3.8 million and $1.8 million for the nine months ended September 30, 2023 and 2022, respectively. The

agreements are without recourse and therefore no recourse liability had been recorded as of September 30, 2023, December 31, 2022 or September 30, 2022.

Our condensed balance sheets included an allowance for doubtful accounts receivables of $12.8 million, $12.6 million and $12.5 million and other receivables of $78.0 million, $71.6 million and $58.0 million at September 30, 2023, December 31, 2022 and September 30, 2022, respectively, which were included in receivables, net.

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INVENTORIES

9 Months Ended

Sep. 30, 2023

Inventory Disclosure [Abstract]

INVENTORIES

NOTE 6. INVENTORIES

Inventories consisted of the following:

	September 30, 2023		December 31, 2022		September 30, 2022
	($ in millions)
Supplies	$	150.3	$	137.6	$	137.2
Raw materials	178.3		201.2		203.4
Work in process	188.4		199.6		189.6
Finished goods	615.5		559.3		569.2
Inventories excluding LIFO reserve	1,132.5		1,097.7		1,099.4
LIFO reserve	(154.8)		(155.8)		(154.3)
Inventories, net	$	977.7	$	941.9	$	945.1

Inventories under the LIFO method are based on annual estimates of quantities and costs as of year-end; therefore, the condensed financial statements at September 30, 2023 reflect certain estimates relating to inventory quantities and costs at December 31, 2023. The replacement cost of our inventories would have been approximately $154.8 million, $155.8 million and $154.3 million higher than reported at September 30, 2023, December 31, 2022 and September 30, 2022, respectively.

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OTHER ASSETS

9 Months Ended

Sep. 30, 2023

Other Assets [Abstract]

OTHER ASSETS

NOTE 7. OTHER ASSETS

Included in other assets were the following:

	September 30, 2023		December 31, 2022		September 30, 2022
	($ in millions)
Supply contracts	$	1,060.6	$	1,048.0	$	1,013.8
Other	56.7		54.5		76.9
Other assets	$	1,117.3	$	1,102.5	$	1,090.7

Amortization expense of $17.8 million and $17.6 million for the three months ended September 30, 2023 and 2022, respectively, and amortization expense of $53.4 million and $52.8 million for the nine months ended September 30, 2023 and 2022, respectively, was recognized within cost of goods sold related to our long-term supply contracts and is reflected in depreciation and amortization on the condensed statements of cash flows.

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GOODWILL AND INTANGIBLE ASSETS

9 Months Ended

Sep. 30, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

GOODWILL AND INTANGIBLES

NOTE 8. GOODWILL AND INTANGIBLE ASSETS

Changes in the carrying value of goodwill were as follows:

	Chlor Alkali Products and Vinyls		Epoxy		Total
	($ in millions)
Balance at January 1, 2022	$	1,275.6	$	145.0	$	1,420.6
Foreign currency translation adjustment	0.5		0.1		0.6
Balance at September 30, 2022	$	1,276.1	$	145.1	$	1,421.2
Balance at January 1, 2023	$	1,275.8	$	145.1	$	1,420.9
Foreign currency translation adjustment	0.1		—		0.1
Balance at September 30, 2023	$	1,275.9	$	145.1	$	1,421.0

Intangible assets consisted of the following:

	September 30, 2023						December 31, 2022						September 30, 2022
	Gross Amount		Accumulated Amortization		Net		Gross Amount		Accumulated Amortization		Net		Gross Amount		Accumulated Amortization		Net
	($ in millions)
Customers, customer contracts and relationships	$	668.0	$	(426.8)	$	241.2	$	669.1	$	(401.2)	$	267.9	$	662.0	$	(389.3)	$	272.7
Acquired technology	92.8		(89.4)		3.4		93.1		(88.3)		4.8		91.9		(86.5)		5.4
Other	4.7		(0.7)		4.0		1.8		(0.7)		1.1		1.8		(0.7)		1.1
Total intangible assets	$	765.5	$	(516.9)	$	248.6	$	764.0	$	(490.2)	$	273.8	$	755.7	$	(476.5)	$	279.2

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DEBT

9 Months Ended

Sep. 30, 2023

Debt Disclosure [Abstract]

DEBT

NOTE 9. DEBT

	Long-term Debt Borrowings (Repayments) for the Nine Months Ended
	September 30, 2023		September 30, 2022
Debt Instruments	($ in millions)
Borrowings:
Senior Revolving Credit Facility	255.0		170.0
Receivables Financing Agreement	332.7		45.0
Total borrowings	$	587.7	$	215.0
Repayments:
5.50% senior notes due 2022	—		(200.0)
Senior Term Loan	(6.6)		—
Senior Revolving Credit Facility	(90.0)		(170.0)
Receivables Financing Agreement	(282.7)		(45.0)
Finance leases	(1.8)		(0.9)
Total repayments	$	(381.1)	$	(415.9)
Long-term debt borrowings (repayments), net	$	206.6	$	(200.9)

Senior Credit Facility

On October 11, 2022, we entered into a new $1,550.0 million senior credit facility (Senior Credit Facility) that replaced our previous senior credit facility (2021 Senior Credit Facility), which included outstanding term loans of $350.0 million and a senior revolving credit facility with aggregate commitments in an amount equal to $800.0 million. The Senior Credit Facility includes a senior term loan facility with aggregate commitments of $350.0 million (Term Loan Facility) and a senior revolving credit facility with aggregate commitments of $1,200.0 million (Senior Revolving Credit Facility). The Term Loan Facility was fully drawn on the closing date with the proceeds of the Term Loan Facility used to refinance the loans and commitments outstanding under the 2021 Senior Credit Facility. The Term Loan Facility requires principal amortization amounts payable beginning March 31, 2023 at a rate of 0.625% per quarter through the end of 2024, increasing to 1.250% per quarter thereafter until maturity. The maturity date for the Senior Credit Facility is October 11, 2027.

The Senior Revolving Credit Facility includes a $100.0 million letter of credit subfacility. At September 30, 2023, we had $1,034.6 million available under our $1,200.0 million Senior Revolving Credit Facility because we had $165.0 million borrowed under the facility and issued $0.4 million of letters of credit.

We were in compliance with all covenants and restrictions under all our outstanding credit agreements as of September 30, 2023, and no event of default had occurred that would permit the lenders under our outstanding credit agreements to accelerate the debt if not cured. In the future, our ability to generate sufficient operating cash flows, among other factors, will determine the amounts available to be borrowed under these facilities. As a result of our restrictive covenant related to the net leverage ratio, the maximum additional borrowings available to us could be limited in the future. The limitation, if an amendment or waiver from our lenders is not obtained, could restrict our ability to borrow the maximum amounts available under the Senior Revolving Credit Facility and the Receivables Financing Agreement.  As of September 30, 2023, there were no covenants or other restrictions that limited our ability to borrow.

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PENSION PLANS AND RETIREMENT BENEFITS

9 Months Ended

Sep. 30, 2023

Retirement Benefits [Abstract]

PENSION PLANS AND RETIREMENT BENEFITS

NOTE 10. PENSION PLANS AND RETIREMENT BENEFITS

We sponsor domestic and foreign defined benefit pension plans for eligible employees and retirees. Most of our domestic employees participate in defined contribution plans.  However, a portion of our bargaining hourly employees continue to participate in our domestic qualified defined benefit pension plans under a flat-benefit formula. Our funding policy for the qualified defined benefit pension plans is consistent with the requirements of federal laws and regulations. Our foreign subsidiaries maintain pension and other benefit plans, which are consistent with local statutory practices.

Our domestic qualified defined benefit pension plan provides that if, within three years following a change of control of Olin, any corporate action is taken or filing made in contemplation of, among other things, a plan termination or merger or other

transfer of assets or liabilities of the plan, and such termination, merger, or transfer thereafter takes place, plan benefits would automatically be increased for affected participants (and retired participants) to absorb any plan surplus (subject to applicable collective bargaining requirements).

We also provide certain postretirement healthcare (medical) and life insurance benefits for eligible active and retired domestic employees. The healthcare plans are contributory with participants’ contributions adjusted annually based on medical rates of inflation and plan experience.

	Pension Benefits				Other Postretirement Benefits
	Three Months Ended September 30,				Three Months Ended September 30,
	2023		2022		2023		2022
Components of Net Periodic Benefit (Income) Cost	($ in millions)
Service cost	$	1.4	$	2.0	$	0.1	$	0.2
Interest cost	26.4		15.1		0.4		0.2
Expected return on plans’ assets	(32.9)		(34.3)		—		—
Amortization of prior service cost	(0.1)		—		—		—
Recognized actuarial loss	0.3		9.0		—		0.1
Net periodic benefit (income) cost	$	(4.9)	$	(8.2)	$	0.5	$	0.5

	Pension Benefits				Other Postretirement Benefits
	Nine Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Components of Net Periodic Benefit (Income) Cost	($ in millions)
Service cost	$	4.2	$	6.5	$	0.5	$	0.8
Interest cost	79.1		46.0		1.3		0.8
Expected return on plans’ assets	(98.5)		(102.8)		—		—
Amortization of prior service cost	(0.3)		(0.4)		0.1		0.1
Recognized actuarial loss	0.9		26.2		0.4		1.1
Net periodic benefit (income) cost	$	(14.6)	$	(24.5)	$	2.3	$	2.8

We made cash contributions to our international qualified defined benefit pension plans of $1.6 million and $0.9 million for the nine months ended September 30, 2023 and 2022, respectively.

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INCOME TAXES

9 Months Ended

Sep. 30, 2023

Income Tax Disclosure [Abstract]

INCOME TAXES

NOTE 11. INCOME TAXES

The effective tax rate for the three months ended September 30, 2023 included a net $7.2 million tax benefit, primarily associated with stock-based compensation and prior year tax positions, partially offset by an expense from a change in tax contingencies. After giving consideration to these items, the effective tax rate for the three months ended September 30, 2023 of 23.2% was higher than the 21.0% U.S. federal statutory rate primarily due to state income tax and an increase in the valuation allowance related to losses in foreign jurisdictions, partially offset by favorable permanent salt depletion deductions and foreign income taxes. The effective tax rate for the three months ended September 30, 2022 included a net $36.6 million benefit primarily associated with a legal entity liquidation. After giving consideration to this benefit, the effective tax rate for the three months ended September 30, 2022 of 24.3% was higher than the 21.0% U.S. federal statutory rate primarily due to state and foreign income taxes, partially offset by foreign income exclusions and favorable permanent salt depletion deductions.

The effective tax rate for the nine months ended September 30, 2023 included a net $24.4 million tax benefit, primarily associated with stock-based compensation and prior year tax positions, partially offset by an expense from a change in tax contingencies. After giving consideration to these items, the effective tax rate for the nine months ended September 30, 2023 of 24.1% was higher than the 21.0% U.S. federal statutory rate primarily due to state income tax and an increase in the valuation allowance related to losses in foreign jurisdictions, partially offset by favorable permanent salt depletion deductions

and foreign income taxes. The effective tax rate for the nine months ended September 30, 2022 included a net $47.5 million tax benefit primarily associated with a legal entity liquidation, prior year tax positions and stock-based compensation. After giving consideration to these items, the effective tax rate for the nine months ended September 30, 2022 of 24.4% was higher than the 21.0% U.S. federal statutory rate primarily due to state and foreign income taxes, partially offset by foreign income exclusions and favorable permanent salt depletion deductions.

As of September 30, 2023, we had $62.1 million of gross unrecognized tax benefits, which would have a net $58.4 million impact on the effective tax rate, if recognized. As of September 30, 2022, we had $44.8 million of gross unrecognized tax benefits, of which $44.7 million would have impacted the effective tax rate, if recognized. The amounts of unrecognized tax benefits were as follows:

	September 30,
	2023		2022
	($ in millions)
Balance at beginning of year	$	51.6	$	43.4
Increases for prior year tax positions	1.3		0.3
Decreases for prior year tax positions	(0.3)		(0.7)
Increases for current year tax positions	10.1		5.9
Foreign currency translation adjustments	(0.6)		(4.1)
Balance at end of period	$	62.1	$	44.8

As of September 30, 2023, we believe it is reasonably possible that our total amount of unrecognized tax benefits will decrease by approximately $48.9 million over the next twelve months. The anticipated reduction primarily relates to settlements with taxing authorities and the expiration of federal, state and foreign statutes of limitation.

We operate globally and file income tax returns in numerous jurisdictions. Our tax returns are subject to examination by various federal, state and local tax authorities. Additionally, examinations are ongoing in various states and foreign jurisdictions. We believe we have adequately provided for all tax positions; however, amounts asserted by taxing authorities could be greater than our accrued position. For our primary tax jurisdictions, the tax years that remain subject to examination are as follows:

	Tax Years
U.S. federal income tax	2018 - 2022
U.S. state income tax	2012 - 2022
Canadian federal income tax	2016 - 2022
Brazil	2016 - 2022
Germany	2015 - 2022
China	2014 - 2022
The Netherlands	2016 - 2022

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CONTRIBUTING EMPLOYEE OWNERSHIP PLAN

9 Months Ended

Sep. 30, 2023

Retirement Benefits [Abstract]

CONTRIBUTING EMPLOYEE OWNERSHIP PLAN

NOTE 12. CONTRIBUTING EMPLOYEE OWNERSHIP PLAN

The Contributing Employee Ownership Plan (CEOP) is a defined contribution plan available to essentially all domestic employees.  We provide a contribution to an individual retirement contribution account maintained with the CEOP equal to an amount of between 5.0% and 7.5% of the employee’s eligible compensation.  The defined contribution plan expense for the three months ended September 30, 2023 and 2022 was $8.4 million and $9.6 million, respectively, and for the nine months ended September 30, 2023 and 2022 was $28.6 million and $28.9 million, respectively.

Company matching contributions are invested in the same investment allocation as the employee’s contribution.  Our matching contributions for eligible employees for the three months ended September 30, 2023 and 2022 was $3.6 million and $4.0 million, respectively, and for the nine months ended September 30, 2023 and 2022 was $11.0 million and $10.8 million, respectively.

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STOCK-BASED COMPENSATION

9 Months Ended

Sep. 30, 2023

Share-Based Payment Arrangement [Abstract]

STOCK-BASED COMPENSATION

NOTE 13. STOCK-BASED COMPENSATION

Stock-based compensation granted includes stock options, performance stock awards, restricted stock awards and deferred directors’ compensation. Stock-based compensation expense (benefit) was as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	($ in millions)
Stock-based compensation	$	6.7	$	5.8	$	19.5	$	20.0
Mark-to-market adjustments	(2.3)		(2.0)		(2.4)		(10.5)
Total expense	$	4.4	$	3.8	$	17.1	$	9.5

The fair value of each stock option granted, which typically vests ratably over three years, but not less than one year, was estimated on the date of grant, using the Black-Scholes option-pricing model with the following weighted-average assumptions:

Grant date	2023			2022
Dividend yield	1.32		%	1.60		%
Risk-free interest rate	4.07		%	1.93		%
Expected volatility of Olin common stock	47		%	48		%
Expected life (years)	7.0			7.0
Weighted-average grant fair value (per option)	$	28.74		$	21.18
Weighted-average exercise price	$	60.55		$	49.71
Options granted	562,124			742,100

Dividend yield was based on our current dividend yield as of the option grant date. Risk-free interest rate was based on zero coupon U.S. Treasury securities rates for the expected life of the options.  Expected volatility was based on our historical stock price movements, as we believe that historical experience is the best available indicator of the expected volatility. Expected life of the option grant was based on historical exercise and cancellation patterns, as we believe that historical experience is the best estimate for future exercise patterns.

Performance share awards are denominated in shares of our stock and are paid half in cash and half in stock.  Payouts for performance share awards are based on two criteria: (1) 50% of the award is based on Olin’s total shareholder returns (TSR) over the applicable three-year performance cycle in relation to the TSR over the same period among a portfolio of public companies which are selected in concert with outside compensation consultants and (2) 50% of the award is based on Olin’s net income over the applicable three-year performance cycle in relation to the net income goal for such period as set by the compensation committee of Olin’s board of directors. The expense associated with performance shares is recorded based on our estimate of our performance relative to the respective target.  If an employee leaves the company before the end of the performance cycle, the performance shares may be prorated based on the number of months of the performance cycle worked and are settled in cash instead of half in cash and half in stock when the three-year performance cycle is completed.

The fair value of each performance share award based on net income was estimated on the date of grant, using the current stock price. The fair value of each performance share award based on TSR was estimated on the date of grant, using a Monte Carlo simulation model with the following weighted average assumptions:

Grant date	2023			2022
Risk-free interest rate	4.46		%	1.74		%
Expected volatility of Olin common stock	52		%	59		%
Expected average volatility of peer companies	42		%	47		%
Average correlation coefficient of peer companies	0.51			0.51
Expected life (years)	3.0			3.0
Grant date fair value (TSR based award)	$	86.98		$	64.13
Grant date fair value (net income based award)	$	60.55		$	49.71
Awards granted	161,474			184,000

Risk-free interest rate was based on zero coupon U.S. Treasury securities rates for the expected life of the performance stock awards. Expected volatility of Olin common stock and peer companies was based on historical stock price movements, as we believe that historical experience is the best available indicator of the expected volatility. The average correlation coefficient of peer companies was determined based on historical trends of Olin’s common stock price compared to the peer companies. Expected life of the performance share award grant was based on historical exercise and cancellation patterns, as we believe that historical experience is the best estimate of future exercise patterns.

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SHAREHOLDERS' EQUITY

9 Months Ended

Sep. 30, 2023

Stockholders' Equity Note [Abstract]

SHAREHOLDERS' EQUITY

NOTE 14. SHAREHOLDERS’ EQUITY

On July 28, 2022, our Board of Directors authorized a share repurchase program for the purchase of shares of common stock at an aggregate price of up to $2.0 billion (the 2022 Repurchase Authorization). This program will terminate upon the purchase of $2.0 billion of common stock.

For the nine months ended September 30, 2023 and 2022, 10.8 million and 20.8 million shares, respectively, of common stock were repurchased and retired at a total value of $595.1 million and $1,100.6 million, respectively. As of September 30, 2023, 16.7 million shares of common stock have been repurchased and retired at a total value of $887.9 million under the 2022 Repurchase Authorization program, and $1,112.1 million of common stock remained authorized to be repurchased under the program.

We issued 0.8 million and 0.9 million shares representing stock options exercised for the nine months ended September 30, 2023 and 2022, respectively, with a total value of $22.3 million and $21.3 million, respectively.

The following table represents the activity included in accumulated other comprehensive loss:

	Foreign Currency Translation Adjustment		Gains (Losses) on Derivative Contracts (net of taxes)		Pension and Other Postretirement Benefits (net of taxes)		Accumulated Other Comprehensive Loss
	($ in millions)
Balance at January 1, 2022	$	(10.9)	$	22.8	$	(499.9)	$	(488.0)
Unrealized (losses) gains:
First quarter	(10.5)		52.8		—		42.3
Second quarter	(26.0)		(36.4)		—		(62.4)
Third quarter	(25.1)		6.6		—		(18.5)
Reclassification adjustments of (gains) losses into income:
First quarter	—		(12.4)		8.9		(3.5)
Second quarter	—		(36.1)		9.0		(27.1)
Third quarter	—		(17.8)		9.1		(8.7)
Tax (provision) benefit:
First quarter	—		(9.7)		(2.3)		(12.0)
Second quarter	—		17.5		(2.3)		15.2
Third quarter	—		2.5		(2.1)		0.4
Net change	(61.6)		(33.0)		20.3		(74.3)
Balance at September 30, 2022	$	(72.5)	$	(10.2)	$	(479.6)	$	(562.3)
Balance at January 1, 2023	$	(38.6)	$	(32.5)	$	(424.8)	$	(495.9)
Unrealized gains (losses):
First quarter	5.5		(20.8)		—		(15.3)
Second quarter	(8.5)		(10.7)		—		(19.2)
Third quarter	(3.3)		(1.9)		—		(5.2)
Reclassification adjustments of losses into income:
First quarter	—		30.7		0.4		31.1
Second quarter	—		20.5		0.5		21.0
Third quarter	—		10.2		0.2		10.4
Tax provision:
First quarter	—		(2.5)		(0.1)		(2.6)
Second quarter	—		(2.4)		(0.1)		(2.5)
Third quarter	—		(2.1)		—		(2.1)
Net change	(6.3)		21.0		0.9		15.6
Balance at September 30, 2023	$	(44.9)	$	(11.5)	$	(423.9)	$	(480.3)

Net income and cost of goods sold included reclassification adjustments for realized gains and losses on derivative contracts from accumulated other comprehensive loss.

Net income and non-operating pension income included the amortization of prior service costs and actuarial losses from accumulated other comprehensive loss.

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SEGMENT INFORMATION

9 Months Ended

Sep. 30, 2023

Segment Reporting [Abstract]

SEGMENT INFORMATION

NOTE 15. SEGMENT INFORMATION

We define segment results as income (loss) before interest expense, interest income, other operating income (expense), non-operating pension income, other income and income taxes. We have three operating segments: Chlor Alkali Products and Vinyls, Epoxy and Winchester. The three operating segments reflect the organization used by our management for purposes of allocating resources and assessing performance. Chlorine and caustic soda used in our Epoxy segment is transferred at cost from the Chlor Alkali Products and Vinyls segment. BWA is consolidated in our Chlor Alkali Products and Vinyls segment. Sales are attributed to geographic areas based on customer location.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Sales:	($ in millions)
Chlor Alkali Products and Vinyls	$	969.6	$	1,263.5	$	3,089.0	$	3,912.2
Epoxy	321.6		644.1		1,016.1		2,206.3
Winchester	380.2		414.1		1,113.3		1,280.7
Total sales	$	1,671.4	$	2,321.7	$	5,218.4	$	7,399.2
Income (loss) before taxes:
Chlor Alkali Products and Vinyls	$	172.3	$	253.9	$	598.3	$	929.0
Epoxy	(28.8)		80.1		(7.9)		358.0
Winchester	64.5		89.0		190.2		327.2
Corporate/other:
Environmental expense	(6.9)		(7.4)		(23.1)		(18.0)
Other corporate and unallocated costs	(22.9)		(27.5)		(79.6)		(92.8)
Restructuring charges	(11.9)		(7.6)		(92.0)		(14.3)
Other operating (expense) income	(0.3)		13.0		27.2		16.3
Interest expense	(46.2)		(36.0)		(133.9)		(103.4)
Interest income	1.0		0.5		3.2		1.2
Non-operating pension income	5.9		9.9		17.0		29.0
Income before taxes	$	126.7	$	367.9	$	499.4	$	1,432.2

Other operating (expense) income for the nine months ended September 30, 2023 included a gain of $27.0 million for the sale of our domestic private trucking fleet and operations. Other operating (expense) income for both the three and nine months ended September 30, 2022 included a gain of $13.0 million for the sale of two former manufacturing facilities.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Sales by geography:	($ in millions)
Chlor Alkali Products and Vinyls
United States	$	651.0	$	870.8	$	2,069.8	$	2,636.6
Europe	57.9		80.9		175.3		233.7
Other foreign	260.7		311.8		843.9		1,041.9
Total Chlor Alkali Products and Vinyls	969.6		1,263.5		3,089.0		3,912.2
Epoxy
United States	131.4		201.0		431.8		696.7
Europe	84.8		280.3		258.8		993.7
Other foreign	105.4		162.8		325.5		515.9
Total Epoxy	321.6		644.1		1,016.1		2,206.3
Winchester
United States	327.7		377.2		982.9		1,180.3
Europe	19.8		7.5		43.4		27.0
Other foreign	32.7		29.4		87.0		73.4
Total Winchester	380.2		414.1		1,113.3		1,280.7
Total
United States	1,110.1		1,449.0		3,484.5		4,513.6
Europe	162.5		368.7		477.5		1,254.4
Other foreign	398.8		504.0		1,256.4		1,631.2
Total sales	$	1,671.4	$	2,321.7	$	5,218.4	$	7,399.2

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Sales by product line:	($ in millions)
Chlor Alkali Products and Vinyls
Caustic soda	$	422.3	$	598.4	$	1,424.0	$	1,752.4
Chlorine, chlorine-derivatives and other products	547.3		665.1		1,665.0		2,159.8
Total Chlor Alkali Products and Vinyls	969.6		1,263.5		3,089.0		3,912.2
Epoxy
Aromatics and allylics	116.9		316.8		387.9		1,092.9
Epoxy resins	204.7		327.3		628.2		1,113.4
Total Epoxy	321.6		644.1		1,016.1		2,206.3
Winchester
Commercial	181.2		271.6		581.1		906.4
Military and law enforcement	199.0		142.5		532.2		374.3
Total Winchester	380.2		414.1		1,113.3		1,280.7
Total sales	$	1,671.4	$	2,321.7	$	5,218.4	$	7,399.2

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ENVIRONMENTAL

9 Months Ended

Sep. 30, 2023

Environmental Remediation Obligations [Abstract]

ENVIRONMENTAL

NOTE 16. ENVIRONMENTAL

We are party to various government and private environmental actions associated with past manufacturing facilities and former waste disposal sites. The condensed balance sheets included reserves for future environmental expenditures to investigate and remediate known sites amounting to $153.5 million, $146.6 million and $149.3 million at September 30, 2023, December 31, 2022 and September 30, 2022, respectively, of which $128.5 million, $121.6 million and $124.3 million, respectively, were classified as other noncurrent liabilities.

Environmental provisions charged to income, which are included in costs of goods sold, were $6.9 million and $7.4 million for the three months ended September 30, 2023 and 2022, respectively, and $23.1 million and $18.0 million for the nine months ended September 30, 2023 and 2022, respectively.

Environmental exposures are difficult to assess for numerous reasons, including the identification of new sites, developments at sites resulting from investigatory studies, advances in technology, changes in environmental laws and regulations and their application, changes in regulatory authorities, the scarcity of reliable data pertaining to identified sites, the difficulty in assessing the involvement and financial capability of other Potentially Responsible Parties (PRPs), our ability to obtain contributions from other parties and the lengthy time periods over which site remediation occurs. It is possible that some of these matters (the outcomes of which are subject to various uncertainties) may be resolved unfavorably to us, which could materially adversely affect our financial position or results of operations.

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COMMITMENTS AND CONTINGENCIES

9 Months Ended

Sep. 30, 2023

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENCIES

NOTE 17. COMMITMENTS AND CONTINGENCIES

Olin, K.A. Steel Chemicals (a wholly owned subsidiary of Olin) and other caustic soda producers were named as defendants in six purported class action civil lawsuits filed March 22, 25 and 26, 2019 and April 12, 2019 in the U.S. District Court for the Western District of New York. Those cases were consolidated on May 22, 2019; the claims in the consolidated “Direct Purchaser” lawsuit, as modified, are on behalf of the respective named plaintiffs and a putative class comprised of all persons and entities who purchased certain types of caustic soda in the U.S. directly from one or more of the defendants, their parents, predecessors, subsidiaries or affiliates at any time on or after October 1, 2015 through December 31, 2018. In August 2023, one of the other defendants announced that it had settled the Direct Purchaser lawsuit and sought court approval of that settlement. Olin, K.A. Steel Chemicals and other caustic soda producers were also named as defendants in two purported class action civil lawsuits filed July 25 and 29, 2019 in the U.S. District Court for the Western District of New York on behalf of the respective named plaintiffs and a putative class comprised of all persons and entities who purchased caustic soda in the U.S. indirectly from distributors at any time on or after October 1, 2015. Those cases were consolidated and a consolidated, amended complaint in the “Indirect Purchaser” lawsuit was filed on August 23, 2021. The other current defendants in the Direct Purchaser and Indirect Purchaser lawsuits are Occidental Chemical Corporation d/b/a OxyChem, Westlake Chemical Corporation, Shin-Etsu Chemical Co., Ltd., and Formosa Plastics Corporation, U.S.A. The Direct Purchaser and Indirect Purchaser lawsuits allege the defendants conspired to fix, raise, maintain and stabilize the price of caustic soda, restrict domestic (U.S.) supply of caustic soda and allocate caustic soda customers. Plaintiffs seek damages and injunctive relief.

Olin, K.A. Steel Chemical, Olin Canada ULC, 3229897 Nova Scotia Co. (wholly owned subsidiaries of Olin) and other alleged caustic soda producers were named as defendants in a proposed class action civil lawsuit filed on October 7, 2020 in the Quebec Superior Court (Province of Quebec) on behalf of the respective named plaintiff and a putative class comprised of all Canadian persons and entities who, between October 1, 2015 and the date of the eventual class action certification, directly or indirectly purchased caustic soda or products containing caustic soda, produced by one or more of the defendants. Olin, K.A. Steel Chemical, Olin Canada ULC, 3229897 Nova Scotia Co. and other alleged caustic soda producers were also named as defendants in a proposed class action civil lawsuit filed November 13, 2020 in the Federal Court of Canada on behalf of the respective named plaintiff and a putative class comprised of all legal persons in Canada who, at any time on or after October 1, 2015 to the present, directly or indirectly purchased caustic soda. The other defendants named in the two Canadian lawsuits are Occidental Petroleum Corporation, Occidental Chemical Corporation, Oxy Canada Sales, Inc., Westlake Chemical Corporation, Axiall Canada, Inc., Shin-Etsu Chemical Co., Ltd., Shintech Incorporated, Formosa Plastics Corporation, and Formosa Plastics Corporation, U.S.A. The lawsuits allege the defendants conspired to fix, raise, maintain control, and stabilize the price of caustic soda, divide and allocate markets, sales, customers and territories, fix, maintain, control, prevent, restrict, lessen or eliminate production and supply of caustic soda, and agree to idle capacity of production and/or refrain from increasing their production capacity. Plaintiffs seek damages, including punitive damages.

We believe we have meritorious legal positions and will continue to represent our interests vigorously in the above matters. Any losses related to these matters are not currently estimable because of unresolved questions of fact and law, but if resolved unfavorably to Olin, could have a material adverse effect on our financial position, cash flows or results of operations.

We, and our subsidiaries, are defendants in various other legal actions (including proceedings based on alleged exposures to asbestos) incidental to our past and current business activities. As of September 30, 2023, December 31, 2022 and September 30, 2022, our condensed balance sheets included accrued liabilities for these other legal actions of $15.3 million, $14.4 million and $14.2 million, respectively. These liabilities do not include costs associated with legal representation.  Based on our analysis, and considering the inherent uncertainties associated with litigation, we do not believe that it is reasonably possible that these other legal actions will materially adversely affect our financial position, cash flows or results of operations.

During the ordinary course of our business, contingencies arise resulting from an existing condition, situation or set of circumstances involving an uncertainty as to the realization of a possible gain contingency.  In certain instances, such as environmental projects, we are responsible for managing the cleanup and remediation of an environmental site.  There exists the possibility of recovering a portion of these costs from other parties.  We account for gain contingencies in accordance with the provisions of ASC 450 “Contingencies” and, therefore, do not record gain contingencies and recognize income until it is earned and realizable.

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DERIVATIVE FINANCIAL INSTRUMENTS

9 Months Ended

Sep. 30, 2023

Derivative Instruments and Hedging Activities Disclosure [Abstract]

DERIVATIVE FINANCIAL INSTRUMENTS

NOTE 18. DERIVATIVE FINANCIAL INSTRUMENTS

We are exposed to market risk in the normal course of our business operations due to our purchases of certain commodities, our ongoing investing and financing activities and our operations that use foreign currencies. The risk of loss can be assessed from the perspective of adverse changes in fair values, cash flows and future earnings. We have established policies and procedures governing our management of market risks and the use of financial instruments to manage exposure to such risks. ASC 815 “Derivatives and Hedging” (ASC 815) requires an entity to recognize all derivatives as either assets or liabilities in the condensed balance sheets and measure those instruments at fair value. In accordance with ASC 815, we designate derivative contracts as cash flow hedges of forecasted purchases of commodities and forecasted interest payments related to variable-rate borrowings and designate certain interest rate swaps as fair value hedges of fixed-rate borrowings. We do not enter into any derivative instruments for trading or speculative purposes.

Energy costs, including electricity and natural gas, and certain raw materials used in our production processes are subject to price volatility. Depending on market conditions, we may enter into futures contracts, forward contracts, commodity swaps and put and call option contracts in order to reduce the impact of commodity price fluctuations. The majority of our commodity derivatives expire within one year.

We actively manage currency exposures that are associated with net monetary asset positions, currency purchases and sales commitments denominated in foreign currencies and foreign currency denominated assets and liabilities created in the normal course of business. We enter into forward sales and purchase contracts to manage currency risk to offset our net exposures, by currency, related to the foreign currency denominated monetary assets and liabilities of our operations. All of the currency derivatives expire within one year and are for U.S. dollar (USD) equivalents. The counterparties to the forward contracts are large financial institutions; however, the risk of loss to us in the event of nonperformance by a counterparty could be significant to our financial position or results of operations. We had the following notional amounts of outstanding forward contracts to buy and sell foreign currency:

	September 30, 2023	December 31, 2022	September 30, 2022
	($ in millions)
Foreign Currency:
Buy	5.3	275.8	273.6
Sell	155.2	110.7	96.0

Cash Flow Hedges

For derivative instruments that are designated and qualify as a cash flow hedge, the change in fair value of the derivative is recognized as a component of other comprehensive income (loss) until the hedged item is recognized in earnings.

We had the following notional amounts of outstanding commodity contracts that were entered into to hedge forecasted purchases:

	September 30, 2023		December 31, 2022		September 30, 2022
	($ in millions)
Natural gas	$	67.2	$	107.6	$	92.1
Ethane	25.5		46.0		45.5
Metals	114.8		107.6		134.5
Total notional	$	207.5	$	261.2	$	272.1

As of September 30, 2023, the counterparties to these commodity contracts were Wells Fargo Bank, N.A., Citibank, N.A., JPMorgan Chase Bank, National Association, Bank of America Corporation and The Toronto Dominion Bank, all of which are major financial institutions.

We use cash flow hedges for certain raw material and energy costs such as copper, zinc, lead, ethane, electricity and natural gas to provide a measure of stability in managing our exposure to price fluctuations associated with forecasted purchases of raw materials and energy used in our manufacturing process. At September 30, 2023, we had open derivative contract positions through 2028. If all open futures contracts had been settled on September 30, 2023, we would have recognized a pretax loss of $15.5 million.

If commodity prices were to remain at September 30, 2023 levels, approximately $12.6 million of deferred losses, net of tax, would be reclassified into earnings during the next twelve months. The actual effect on earnings will be dependent on actual commodity prices when the forecasted transactions occur.

Fair Value Hedges

We use interest rate swaps as a means of managing interest expense and floating interest rate exposure to optimal levels. For derivative instruments that are designated and qualify as a fair value hedge, the gain or loss on the derivative as well as the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in current earnings. We include the gain or loss on the hedged items (fixed-rate borrowings) in the same line item, interest expense, as the offsetting loss or gain on the related interest rate swaps.

Financial Statement Impacts

We present our derivative assets and liabilities in our condensed balance sheets on a net basis whenever we have a legally enforceable master netting agreement with the counterparty to our derivative contracts. We use these agreements to manage and substantially reduce our potential counterparty credit risk.

The following table summarizes the location and fair value of the derivative instruments on our condensed balance sheets. The table disaggregates our net derivative assets and liabilities into gross components on a contract-by-contract basis before giving effect to master netting arrangements:

	September 30, 2023		December 31, 2022		September 30, 2022
	($ in millions)
Asset derivatives:
Other current assets
Derivatives designated as hedging instruments:
Commodity contracts - gains	$	1.7	$	2.4	$	15.1
Commodity contracts - losses	(0.4)		(0.9)		(1.5)
Derivatives not designated as hedging instruments:
Foreign exchange contracts - gains	1.2		0.3		1.3
Foreign exchange contracts - losses	(0.1)		—		(0.2)
Total other current assets	2.4		1.8		14.7
Other assets
Derivatives designated as hedging instruments:
Commodity contracts - gains	3.2		4.0		3.8
Commodity contracts - losses	—		—		(0.1)
Total other assets	3.2		4.0		3.7
Total asset derivatives(1)	$	5.6	$	5.8	$	18.4
Liability derivatives:
Accrued liabilities
Derivatives designated as hedging instruments:
Commodity contracts - losses	$	19.3	$	43.3	$	34.7
Commodity contracts - gains	(1.5)		(1.7)		(6.8)
Derivatives not designated as hedging instruments:
Foreign exchange contracts - losses	—		1.7		5.3
Foreign exchange contracts - gains	—		(0.8)		(1.8)
Total accrued liabilities	17.8		42.5		31.4
Other liabilities
Derivatives designated as hedging instruments:
Commodity contracts - losses	2.5		8.0		2.6
Commodity contracts - gains	(0.3)		(0.6)		—
Total other liabilities	2.2		7.4		2.6
Total liability derivatives(1)	$	20.0	$	49.9	$	34.0

(1)     Does not include the impact of cash collateral received from or provided to counterparties.

The following table summarizes the effects of derivative instruments on our condensed statements of operations:

		Amount of Gain (Loss)
		Three Months Ended September 30,				Nine Months Ended September 30,
	Location of Gain (Loss)	2023		2022		2023		2022
Derivatives – Cash Flow Hedges		($ in millions)
Recognized in other comprehensive loss:
Commodity contracts	———	$	(1.9)	$	6.6	$	(33.4)	$	23.0
Reclassified from accumulated other comprehensive loss into income:
Commodity contracts	Cost of goods sold	$	(10.2)	$	17.8	$	(61.4)	$	66.3
Derivatives Not Designated as Hedging Instruments
Commodity contracts	Cost of goods sold	$	—	$	—	$	(0.6)	$	0.5
Foreign exchange contracts	Selling and administration	$	3.6	$	(15.6)	$	(9.6)	$	(42.7)

Credit Risk and Collateral

By using derivative instruments, we are exposed to credit and market risk. If a counterparty fails to fulfill its performance obligations under a derivative contract, our credit risk will equal the fair value gain in a derivative. Generally, when the fair value of a derivative contract is positive, this indicates that the counterparty owes us, thus creating a repayment risk for us. When the fair value of a derivative contract is negative, we owe the counterparty and, therefore, assume no repayment risk. We minimize the credit (or repayment) risk in derivative instruments by entering into transactions with high-quality counterparties. We monitor our positions and the credit ratings of our counterparties, and we do not anticipate non-performance by the counterparties.

Based on the agreements with our various counterparties, cash collateral is required to be provided when the net fair value of the derivatives, with the counterparty, exceeds a specific threshold. If the threshold is exceeded, cash is either provided by the counterparty to us if the value of the derivatives is our asset, or cash is provided by us to the counterparty if the value of the derivatives is our liability. As of September 30, 2023, December 31, 2022 and September 30, 2022, this threshold was not exceeded. In all instances where we are party to a master netting agreement, we offset the receivable or payable recognized upon payment of cash collateral against the fair value amounts recognized for derivative instruments that have also been offset under such master netting agreements.

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FAIR VALUE MEASUREMENTS

9 Months Ended

Sep. 30, 2023

Fair Value Disclosures [Abstract]

FAIR VALUE MEASUREMENTS

NOTE 19. FAIR VALUE MEASUREMENTS

Fair value is defined as the price at which an asset could be exchanged in a current transaction between knowledgeable, willing parties or the amount that would be paid to transfer a liability to a new obligor, not the amount that would be paid to settle the liability with the creditor. Where available, fair value is based on observable market prices or parameters or derived from such prices or parameters. Where observable prices or inputs are not available, valuation models are applied. These valuation techniques involve some level of management estimation and judgment, the degree of which is dependent on the price transparency for the instruments or market and the instruments’ complexity.

Assets and liabilities recorded at fair value in the condensed balance sheets are categorized based upon the level of judgment associated with the inputs used to measure their fair value. Hierarchical levels, defined by ASC 820 “Fair Value Measurements and Disclosures” (ASC 820) are directly related to the amount of subjectivity associated with the inputs to fair valuation of these assets and liabilities, and are as follows:

Level 1 — Inputs were unadjusted, quoted prices in active markets for identical assets or liabilities at the measurement date.

Level 2 — Inputs (other than quoted prices included in Level 1) were either directly or indirectly observable for the asset or liability through correlation with market data at the measurement date and for the duration of the instrument’s anticipated life.

Level 3 — Inputs reflected management’s best estimate of what market participants would use in pricing the asset or liability at the measurement date. Consideration was given to the risk inherent in the valuation technique and the risk inherent in the inputs to the model.

We are required to separately disclose assets and liabilities measured at fair value on a recurring basis, from those measured at fair value on a nonrecurring basis. Nonfinancial assets measured at fair value on a nonrecurring basis are intangible assets and goodwill, which are reviewed for impairment annually in the fourth quarter and/or when circumstances or other events indicate that impairment may have occurred.

Determining which hierarchical level an asset or liability falls within requires significant judgment. We evaluate our hierarchy disclosures each quarter. The following table summarizes the assets and liabilities measured at fair value in the condensed balance sheets:

	Fair Value Measurements
Balance at September 30, 2023	Level 1		Level 2		Level 3		Total
Assets	($ in millions)
Commodity contracts	$	—	$	4.5	$	—	$	4.5
Foreign exchange contracts	—		1.1		—		1.1
Total Assets	$	—	$	5.6	$	—	$	5.6
Liabilities
Commodity contracts	$	—	$	20.0	$	—	$	20.0
Total Liabilities	$	—	$	20.0	$	—	$	20.0
Balance at December 31, 2022
Assets
Commodity contracts	$	—	$	5.5	$	—	$	5.5
Foreign exchange contracts	—		0.3		—		0.3
Total Assets	$	—	$	5.8	$	—	$	5.8
Liabilities
Commodity contracts	$	—	$	49.0	$	—	$	49.0
Foreign exchange contracts	—		0.9		—		0.9
Total Liabilities	$	—	$	49.9	$	—	$	49.9
Balance at September 30, 2022
Assets
Commodity contracts	$	—	$	17.3	$	—	$	17.3
Foreign exchange contracts	—		1.1		—		1.1
Total Assets	$	—	$	18.4	$	—	$	18.4
Liabilities
Commodity contracts	$	—	$	30.5	$	—	$	30.5
Foreign exchange contracts	—		3.5		—		3.5
Total Liabilities	$	—	$	34.0	$	—	$	34.0

Commodity Contracts

Commodity contract financial instruments were valued primarily based on prices and other relevant information observable in market transactions involving identical or comparable assets or liabilities including both forward and spot prices for commodities. We use commodity derivative contracts for certain raw materials and energy costs such as copper, zinc, lead, ethane, electricity and natural gas to provide a measure of stability in managing our exposure to price fluctuations.

Foreign Currency Contracts

Foreign currency contract financial instruments were valued primarily based on relevant information observable in market transactions involving identical or comparable assets or liabilities including both forward and spot prices for currencies. We enter into forward sales and purchase contracts to manage currency risk resulting from purchase and sale commitments denominated in foreign currencies.

Financial Instruments

The carrying values of cash and cash equivalents, accounts receivable and accounts payable approximated fair values due to the short-term maturities of these instruments. Since our long-term debt instruments may not be actively traded, the inputs used to measure the fair value of our long-term debt are based on current market rates for debt of similar risk and maturities and is classified as Level 2 in the fair value measurement hierarchy. As of September 30, 2023, December 31, 2022 and September 30, 2022, the fair value measurements of debt were $2,666.9 million, $2,517.7 million and $2,386.5 million, respectively.

Nonrecurring Fair Value Measurements

In addition to assets and liabilities that are recorded at fair value on a recurring basis, we record assets and liabilities at fair value on a nonrecurring basis as required by ASC 820. There were no assets or liabilities measured at fair value on a nonrecurring basis as of September 30, 2023, December 31, 2022 and September 30, 2022.

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SUBSEQUENT EVENT

9 Months Ended

Sep. 30, 2023

Subsequent Events [Abstract]

Subsequent Events

NOTE 20. SUBSEQUENT EVENT

On October 1, 2023, Olin acquired the assets of White Flyer Targets, LLC (“White Flyer”) from Reagent Diversified Holdings, Inc. for $63.7 million, subject to normal post-closing adjustments. The acquisition was financed with cash on hand. White Flyer designs, manufactures and sells recreational trap, skeet, international and sporting clay targets and will be included in Olin’s existing Winchester segment. The initial purchase accounting of the transaction is not yet complete as a result of the timing of the acquisition. The acquisition is not material and therefore supplemental pro forma financial information is not provided.

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Pay vs Performance Disclosure - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Pay vs Performance Disclosure
Pay vs Performance Disclosure, Table			Pay vs Performance Disclosure
Net (loss) income	$ 104.5	$ 315.2	$ 403.2	$ 1,130.3

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Insider Trading Arrangements	9 Months Ended
	Sep. 30, 2023
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

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RESTRUCTURING CHARGES (Tables)

9 Months Ended

Sep. 30, 2023

Restructuring and Related Activities [Abstract]

Schedule of Restructuring Reserve by Type of Cost

The following table summarizes the 2023 and 2022 activities by major component of these restructuring actions and the remaining balances of accrued restructuring costs as of September 30, 2023 and 2022:

	Employee severance and related benefit costs		Lease and other contract termination costs		Facility exit costs		Write-off of equipment and facility		Total
	($ in millions)
Balance at January 1, 2022	$	6.9	$	5.4	$	—	$	—	$	12.3
Restructuring charges:
First quarter	—		0.1		2.6		0.4		3.1
Second quarter	—		0.2		3.1		0.3		3.6
Third quarter	—		—		4.9		2.7		7.6
Amounts utilized	(4.3)		(1.3)		(10.6)		(3.4)		(19.6)
Balance at September 30, 2022	$	2.6	$	4.4	$	—	$	—	$	7.0
Balance at January 1, 2023	$	9.4	$	4.2	$	—	$	—	$	13.6
Restructuring charges:
First quarter	—		39.7		8.4		12.8		60.9
Second quarter	3.3		1.7		9.3		4.9		19.2
Third quarter	2.6		2.0		7.3		—		11.9
Amounts utilized	(3.4)		(13.4)		(25.0)		(17.7)		(59.5)
Balance at September 30, 2023	$	11.9	$	34.2	$	—	$	—	$	46.1

Cumulative Restructuring Charges by Type and Plan

The following table summarizes the cumulative restructuring charges of these restructuring actions by major component through September 30, 2023:

	Chlor Alkali Products and Vinyls								Epoxy		Corporate/other		Total
	McIntosh Plan		Freeport 2021 Plan		Freeport 2019 Plan		Chlor Alkali 2016 Plan		Epoxy Optimization Plan		Productivity Plan
	($ in millions)
Write-off of equipment and facility	$	2.7	$	—	$	58.9	$	78.1	$	18.3	$	—	$	158.0
Employee severance and related benefit costs	—		—		2.1		6.7		13.3		10.3		32.4
Facility exit costs	9.4		11.9		16.5		53.2		12.7		—		103.7
Employee relocation costs	—		—		—		1.7		—		—		1.7
Lease and other contract termination costs	6.4		—		—		43.0		43.4		—		92.8
Total cumulative restructuring charges	$	18.5	$	11.9	$	77.5	$	182.7	$	87.7	$	10.3	$	388.6

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EARNINGS PER SHARE (Tables)

9 Months Ended

Sep. 30, 2023

Earnings Per Share [Abstract]

Basic and Diluted Earnings Per Share Table

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Computation of Net Income per Share	(In millions, except per share data)
Net income	$	104.5	$	315.2	$	403.2	$	1,130.3
Net income (loss) attributable to noncontrolling interests	0.4		—		(4.1)		—
Net income attributable to Olin Corporation	$	104.1	$	315.2	$	407.3	$	1,130.3
Basic shares	124.2		141.2		127.5		148.3
Basic net income attributable to Olin Corporation per share	$	0.84	$	2.23	$	3.19	$	7.62
Diluted shares:
Basic shares	124.2		141.2		127.5		148.3
Stock-based compensation	2.8		3.1		3.1		3.6
Diluted shares	127.0		144.3		130.6		151.9
Diluted net income attributable to Olin Corporation per share	$	0.82	$	2.18	$	3.12	$	7.44

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ACCOUNTS RECEIVABLES (Tables)

9 Months Ended

Sep. 30, 2023

Receivables [Abstract]

AR Facilities

The following table summarizes the AR Facilities activity:

	September 30,
	2023		2022
	($ in millions)
Balance at beginning of year	$	111.8	$	83.3
Gross receivables sold	749.5		769.3
Payments received from customers on sold accounts	(788.6)		(761.3)
Balance at end of period	$	72.7	$	91.3

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INVENTORIES (Tables)

9 Months Ended

Sep. 30, 2023

Inventory Disclosure [Abstract]

Inventories Table

Inventories consisted of the following:

	September 30, 2023		December 31, 2022		September 30, 2022
	($ in millions)
Supplies	$	150.3	$	137.6	$	137.2
Raw materials	178.3		201.2		203.4
Work in process	188.4		199.6		189.6
Finished goods	615.5		559.3		569.2
Inventories excluding LIFO reserve	1,132.5		1,097.7		1,099.4
LIFO reserve	(154.8)		(155.8)		(154.3)
Inventories, net	$	977.7	$	941.9	$	945.1

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OTHER ASSETS (Tables)

9 Months Ended

Sep. 30, 2023

Other Assets [Abstract]

Schedule of Other Assets

Included in other assets were the following:

	September 30, 2023		December 31, 2022		September 30, 2022
	($ in millions)
Supply contracts	$	1,060.6	$	1,048.0	$	1,013.8
Other	56.7		54.5		76.9
Other assets	$	1,117.3	$	1,102.5	$	1,090.7

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GOODWILL AND INTANGIBLE ASSETS (Tables)

9 Months Ended

Sep. 30, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

Changes in the carrying value of goodwill were as follows:

	Chlor Alkali Products and Vinyls		Epoxy		Total
	($ in millions)
Balance at January 1, 2022	$	1,275.6	$	145.0	$	1,420.6
Foreign currency translation adjustment	0.5		0.1		0.6
Balance at September 30, 2022	$	1,276.1	$	145.1	$	1,421.2
Balance at January 1, 2023	$	1,275.8	$	145.1	$	1,420.9
Foreign currency translation adjustment	0.1		—		0.1
Balance at September 30, 2023	$	1,275.9	$	145.1	$	1,421.0

Schedule of Finite-Lived Intangible Assets

Intangible assets consisted of the following:

	September 30, 2023						December 31, 2022						September 30, 2022
	Gross Amount		Accumulated Amortization		Net		Gross Amount		Accumulated Amortization		Net		Gross Amount		Accumulated Amortization		Net
	($ in millions)
Customers, customer contracts and relationships	$	668.0	$	(426.8)	$	241.2	$	669.1	$	(401.2)	$	267.9	$	662.0	$	(389.3)	$	272.7
Acquired technology	92.8		(89.4)		3.4		93.1		(88.3)		4.8		91.9		(86.5)		5.4
Other	4.7		(0.7)		4.0		1.8		(0.7)		1.1		1.8		(0.7)		1.1
Total intangible assets	$	765.5	$	(516.9)	$	248.6	$	764.0	$	(490.2)	$	273.8	$	755.7	$	(476.5)	$	279.2

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DEBT (Tables)

9 Months Ended

Sep. 30, 2023

Debt Disclosure [Abstract]

Schedule of Debt

	Long-term Debt Borrowings (Repayments) for the Nine Months Ended
	September 30, 2023		September 30, 2022
Debt Instruments	($ in millions)
Borrowings:
Senior Revolving Credit Facility	255.0		170.0
Receivables Financing Agreement	332.7		45.0
Total borrowings	$	587.7	$	215.0
Repayments:
5.50% senior notes due 2022	—		(200.0)
Senior Term Loan	(6.6)		—
Senior Revolving Credit Facility	(90.0)		(170.0)
Receivables Financing Agreement	(282.7)		(45.0)
Finance leases	(1.8)		(0.9)
Total repayments	$	(381.1)	$	(415.9)
Long-term debt borrowings (repayments), net	$	206.6	$	(200.9)

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PENSION PLANS AND RETIREMENT BENEFITS (Tables)

9 Months Ended

Sep. 30, 2023

Retirement Benefits [Abstract]

Components of Net Periodic Benefit (Income) Cost

	Pension Benefits				Other Postretirement Benefits
	Three Months Ended September 30,				Three Months Ended September 30,
	2023		2022		2023		2022
Components of Net Periodic Benefit (Income) Cost	($ in millions)
Service cost	$	1.4	$	2.0	$	0.1	$	0.2
Interest cost	26.4		15.1		0.4		0.2
Expected return on plans’ assets	(32.9)		(34.3)		—		—
Amortization of prior service cost	(0.1)		—		—		—
Recognized actuarial loss	0.3		9.0		—		0.1
Net periodic benefit (income) cost	$	(4.9)	$	(8.2)	$	0.5	$	0.5

	Pension Benefits				Other Postretirement Benefits
	Nine Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Components of Net Periodic Benefit (Income) Cost	($ in millions)
Service cost	$	4.2	$	6.5	$	0.5	$	0.8
Interest cost	79.1		46.0		1.3		0.8
Expected return on plans’ assets	(98.5)		(102.8)		—		—
Amortization of prior service cost	(0.3)		(0.4)		0.1		0.1
Recognized actuarial loss	0.9		26.2		0.4		1.1
Net periodic benefit (income) cost	$	(14.6)	$	(24.5)	$	2.3	$	2.8

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INCOME TAXES (Tables)

9 Months Ended

Sep. 30, 2023

Income Tax Disclosure [Abstract]

Unrecognized Tax Benefits

The amounts of unrecognized tax benefits were as follows:

	September 30,
	2023		2022
	($ in millions)
Balance at beginning of year	$	51.6	$	43.4
Increases for prior year tax positions	1.3		0.3
Decreases for prior year tax positions	(0.3)		(0.7)
Increases for current year tax positions	10.1		5.9
Foreign currency translation adjustments	(0.6)		(4.1)
Balance at end of period	$	62.1	$	44.8

Tax Returns Subject to Examination

For our primary tax jurisdictions, the tax years that remain subject to examination are as follows:

	Tax Years
U.S. federal income tax	2018 - 2022
U.S. state income tax	2012 - 2022
Canadian federal income tax	2016 - 2022
Brazil	2016 - 2022
Germany	2015 - 2022
China	2014 - 2022
The Netherlands	2016 - 2022

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STOCK-BASED COMPENSATION (Tables)

9 Months Ended

Sep. 30, 2023

Share-Based Payment Arrangement [Abstract]

Stock-based compensation expense

Stock-based compensation expense (benefit) was as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	($ in millions)
Stock-based compensation	$	6.7	$	5.8	$	19.5	$	20.0
Mark-to-market adjustments	(2.3)		(2.0)		(2.4)		(10.5)
Total expense	$	4.4	$	3.8	$	17.1	$	9.5

Schedule of fair value of stock options granted valuation assumptions

The fair value of each stock option granted, which typically vests ratably over three years, but not less than one year, was estimated on the date of grant, using the Black-Scholes option-pricing model with the following weighted-average assumptions:

Grant date	2023			2022
Dividend yield	1.32		%	1.60		%
Risk-free interest rate	4.07		%	1.93		%
Expected volatility of Olin common stock	47		%	48		%
Expected life (years)	7.0			7.0
Weighted-average grant fair value (per option)	$	28.74		$	21.18
Weighted-average exercise price	$	60.55		$	49.71
Options granted	562,124			742,100

Schedule of fair value of performance share awards granted valuation assumptions

The fair value of each performance share award based on TSR was estimated on the date of grant, using a Monte Carlo simulation model with the following weighted average assumptions:

Grant date	2023			2022
Risk-free interest rate	4.46		%	1.74		%
Expected volatility of Olin common stock	52		%	59		%
Expected average volatility of peer companies	42		%	47		%
Average correlation coefficient of peer companies	0.51			0.51
Expected life (years)	3.0			3.0
Grant date fair value (TSR based award)	$	86.98		$	64.13
Grant date fair value (net income based award)	$	60.55		$	49.71
Awards granted	161,474			184,000

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SHAREHOLDERS' EQUITY (Tables)

9 Months Ended

Sep. 30, 2023

Stockholders' Equity Note [Abstract]

Activity included in accumulated other comprehensive loss table

The following table represents the activity included in accumulated other comprehensive loss:

	Foreign Currency Translation Adjustment		Gains (Losses) on Derivative Contracts (net of taxes)		Pension and Other Postretirement Benefits (net of taxes)		Accumulated Other Comprehensive Loss
	($ in millions)
Balance at January 1, 2022	$	(10.9)	$	22.8	$	(499.9)	$	(488.0)
Unrealized (losses) gains:
First quarter	(10.5)		52.8		—		42.3
Second quarter	(26.0)		(36.4)		—		(62.4)
Third quarter	(25.1)		6.6		—		(18.5)
Reclassification adjustments of (gains) losses into income:
First quarter	—		(12.4)		8.9		(3.5)
Second quarter	—		(36.1)		9.0		(27.1)
Third quarter	—		(17.8)		9.1		(8.7)
Tax (provision) benefit:
First quarter	—		(9.7)		(2.3)		(12.0)
Second quarter	—		17.5		(2.3)		15.2
Third quarter	—		2.5		(2.1)		0.4
Net change	(61.6)		(33.0)		20.3		(74.3)
Balance at September 30, 2022	$	(72.5)	$	(10.2)	$	(479.6)	$	(562.3)
Balance at January 1, 2023	$	(38.6)	$	(32.5)	$	(424.8)	$	(495.9)
Unrealized gains (losses):
First quarter	5.5		(20.8)		—		(15.3)
Second quarter	(8.5)		(10.7)		—		(19.2)
Third quarter	(3.3)		(1.9)		—		(5.2)
Reclassification adjustments of losses into income:
First quarter	—		30.7		0.4		31.1
Second quarter	—		20.5		0.5		21.0
Third quarter	—		10.2		0.2		10.4
Tax provision:
First quarter	—		(2.5)		(0.1)		(2.6)
Second quarter	—		(2.4)		(0.1)		(2.5)
Third quarter	—		(2.1)		—		(2.1)
Net change	(6.3)		21.0		0.9		15.6
Balance at September 30, 2023	$	(44.9)	$	(11.5)	$	(423.9)	$	(480.3)

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SEGMENT INFORMATION (Tables)

9 Months Ended

Sep. 30, 2023

Segment Reporting [Abstract]

Segment Information

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Sales:	($ in millions)
Chlor Alkali Products and Vinyls	$	969.6	$	1,263.5	$	3,089.0	$	3,912.2
Epoxy	321.6		644.1		1,016.1		2,206.3
Winchester	380.2		414.1		1,113.3		1,280.7
Total sales	$	1,671.4	$	2,321.7	$	5,218.4	$	7,399.2
Income (loss) before taxes:
Chlor Alkali Products and Vinyls	$	172.3	$	253.9	$	598.3	$	929.0
Epoxy	(28.8)		80.1		(7.9)		358.0
Winchester	64.5		89.0		190.2		327.2
Corporate/other:
Environmental expense	(6.9)		(7.4)		(23.1)		(18.0)
Other corporate and unallocated costs	(22.9)		(27.5)		(79.6)		(92.8)
Restructuring charges	(11.9)		(7.6)		(92.0)		(14.3)
Other operating (expense) income	(0.3)		13.0		27.2		16.3
Interest expense	(46.2)		(36.0)		(133.9)		(103.4)
Interest income	1.0		0.5		3.2		1.2
Non-operating pension income	5.9		9.9		17.0		29.0
Income before taxes	$	126.7	$	367.9	$	499.4	$	1,432.2

Disaggregation of Revenue

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Sales by geography:	($ in millions)
Chlor Alkali Products and Vinyls
United States	$	651.0	$	870.8	$	2,069.8	$	2,636.6
Europe	57.9		80.9		175.3		233.7
Other foreign	260.7		311.8		843.9		1,041.9
Total Chlor Alkali Products and Vinyls	969.6		1,263.5		3,089.0		3,912.2
Epoxy
United States	131.4		201.0		431.8		696.7
Europe	84.8		280.3		258.8		993.7
Other foreign	105.4		162.8		325.5		515.9
Total Epoxy	321.6		644.1		1,016.1		2,206.3
Winchester
United States	327.7		377.2		982.9		1,180.3
Europe	19.8		7.5		43.4		27.0
Other foreign	32.7		29.4		87.0		73.4
Total Winchester	380.2		414.1		1,113.3		1,280.7
Total
United States	1,110.1		1,449.0		3,484.5		4,513.6
Europe	162.5		368.7		477.5		1,254.4
Other foreign	398.8		504.0		1,256.4		1,631.2
Total sales	$	1,671.4	$	2,321.7	$	5,218.4	$	7,399.2

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Sales by product line:	($ in millions)
Chlor Alkali Products and Vinyls
Caustic soda	$	422.3	$	598.4	$	1,424.0	$	1,752.4
Chlorine, chlorine-derivatives and other products	547.3		665.1		1,665.0		2,159.8
Total Chlor Alkali Products and Vinyls	969.6		1,263.5		3,089.0		3,912.2
Epoxy
Aromatics and allylics	116.9		316.8		387.9		1,092.9
Epoxy resins	204.7		327.3		628.2		1,113.4
Total Epoxy	321.6		644.1		1,016.1		2,206.3
Winchester
Commercial	181.2		271.6		581.1		906.4
Military and law enforcement	199.0		142.5		532.2		374.3
Total Winchester	380.2		414.1		1,113.3		1,280.7
Total sales	$	1,671.4	$	2,321.7	$	5,218.4	$	7,399.2

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DERIVATIVE FINANCIAL INSTRUMENTS (Tables)

9 Months Ended

Sep. 30, 2023

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Open Forward Foreign Currency Contract

We had the following notional amounts of outstanding forward contracts to buy and sell foreign currency:

	September 30, 2023	December 31, 2022	September 30, 2022
	($ in millions)
Foreign Currency:
Buy	5.3	275.8	273.6
Sell	155.2	110.7	96.0

Schedule of derivative instruments

We had the following notional amounts of outstanding commodity contracts that were entered into to hedge forecasted purchases:

	September 30, 2023		December 31, 2022		September 30, 2022
	($ in millions)
Natural gas	$	67.2	$	107.6	$	92.1
Ethane	25.5		46.0		45.5
Metals	114.8		107.6		134.5
Total notional	$	207.5	$	261.2	$	272.1

Summary of location and fair value of derivative instruments on condensed balance sheets

The following table summarizes the location and fair value of the derivative instruments on our condensed balance sheets. The table disaggregates our net derivative assets and liabilities into gross components on a contract-by-contract basis before giving effect to master netting arrangements:

	September 30, 2023		December 31, 2022		September 30, 2022
	($ in millions)
Asset derivatives:
Other current assets
Derivatives designated as hedging instruments:
Commodity contracts - gains	$	1.7	$	2.4	$	15.1
Commodity contracts - losses	(0.4)		(0.9)		(1.5)
Derivatives not designated as hedging instruments:
Foreign exchange contracts - gains	1.2		0.3		1.3
Foreign exchange contracts - losses	(0.1)		—		(0.2)
Total other current assets	2.4		1.8		14.7
Other assets
Derivatives designated as hedging instruments:
Commodity contracts - gains	3.2		4.0		3.8
Commodity contracts - losses	—		—		(0.1)
Total other assets	3.2		4.0		3.7
Total asset derivatives(1)	$	5.6	$	5.8	$	18.4
Liability derivatives:
Accrued liabilities
Derivatives designated as hedging instruments:
Commodity contracts - losses	$	19.3	$	43.3	$	34.7
Commodity contracts - gains	(1.5)		(1.7)		(6.8)
Derivatives not designated as hedging instruments:
Foreign exchange contracts - losses	—		1.7		5.3
Foreign exchange contracts - gains	—		(0.8)		(1.8)
Total accrued liabilities	17.8		42.5		31.4
Other liabilities
Derivatives designated as hedging instruments:
Commodity contracts - losses	2.5		8.0		2.6
Commodity contracts - gains	(0.3)		(0.6)		—
Total other liabilities	2.2		7.4		2.6
Total liability derivatives(1)	$	20.0	$	49.9	$	34.0

(1)     Does not include the impact of cash collateral received from or provided to counterparties.

Summary of effects of derivative instruments on condensed statements of income

The following table summarizes the effects of derivative instruments on our condensed statements of operations:

		Amount of Gain (Loss)
		Three Months Ended September 30,				Nine Months Ended September 30,
	Location of Gain (Loss)	2023		2022		2023		2022
Derivatives – Cash Flow Hedges		($ in millions)
Recognized in other comprehensive loss:
Commodity contracts	———	$	(1.9)	$	6.6	$	(33.4)	$	23.0
Reclassified from accumulated other comprehensive loss into income:
Commodity contracts	Cost of goods sold	$	(10.2)	$	17.8	$	(61.4)	$	66.3
Derivatives Not Designated as Hedging Instruments
Commodity contracts	Cost of goods sold	$	—	$	—	$	(0.6)	$	0.5
Foreign exchange contracts	Selling and administration	$	3.6	$	(15.6)	$	(9.6)	$	(42.7)

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FAIR VALUE MEASUREMENTS (Tables)

9 Months Ended

Sep. 30, 2023

Fair Value Disclosures [Abstract]

Table of financial instruments measured at fair value

The following table summarizes the assets and liabilities measured at fair value in the condensed balance sheets:

	Fair Value Measurements
Balance at September 30, 2023	Level 1		Level 2		Level 3		Total
Assets	($ in millions)
Commodity contracts	$	—	$	4.5	$	—	$	4.5
Foreign exchange contracts	—		1.1		—		1.1
Total Assets	$	—	$	5.6	$	—	$	5.6
Liabilities
Commodity contracts	$	—	$	20.0	$	—	$	20.0
Total Liabilities	$	—	$	20.0	$	—	$	20.0
Balance at December 31, 2022
Assets
Commodity contracts	$	—	$	5.5	$	—	$	5.5
Foreign exchange contracts	—		0.3		—		0.3
Total Assets	$	—	$	5.8	$	—	$	5.8
Liabilities
Commodity contracts	$	—	$	49.0	$	—	$	49.0
Foreign exchange contracts	—		0.9		—		0.9
Total Liabilities	$	—	$	49.9	$	—	$	49.9
Balance at September 30, 2022
Assets
Commodity contracts	$	—	$	17.3	$	—	$	17.3
Foreign exchange contracts	—		1.1		—		1.1
Total Assets	$	—	$	18.4	$	—	$	18.4
Liabilities
Commodity contracts	$	—	$	30.5	$	—	$	30.5
Foreign exchange contracts	—		3.5		—		3.5
Total Liabilities	$	—	$	34.0	$	—	$	34.0

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RESTRUCTURING CHARGES (Details 1) $ in Millions	3 Months Ended						9 Months Ended		31 Months Ended	32 Months Ended	46 Months Ended	90 Months Ended
	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2023 USD ($)	Oct. 21, 2021 T	Dec. 11, 2019 T	Mar. 21, 2016 T
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 11.9	$ 19.2	$ 60.9	$ 7.6	$ 3.6	$ 3.1	$ 92.0	$ 14.3				$ 388.6
Inception to date Amounts Utilized (cash)												184.5
Inception to date Amounts Utilized (non-cash)												158.0
Epoxy Optimization Plan | Epoxy
Restructuring Cost and Reserve [Line Items]
Restructuring charges	8.6						79.7					87.7
Additional restructuring and related expected cost	45.0						45.0		$ 45.0	$ 45.0	$ 45.0	45.0
McIntosh Plan | Chlor Alkali Products and Vinyls
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.7			5.5			4.6	7.1	18.5
Additional restructuring and related expected cost	25.0						25.0		25.0	25.0	25.0	25.0
McIntosh Restructuring Capacity Reduction | T													400,000
Freeport 2021 Plan | Chlor Alkali Products and Vinyls
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.7			0.4			2.8	1.9		11.9
Additional restructuring and related expected cost	15.0						15.0		15.0	15.0	15.0	15.0
Freeport 2019 Plan | Chlor Alkali Products and Vinyls
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1.9			$ 1.7			4.9	4.9			77.5
Additional restructuring and related expected cost	25.0						25.0		25.0	25.0	25.0	25.0
Freeport Chlor Alkali Capacity Reduction | T														230,000
Chlor Alkali 2016 Plan | Chlor Alkali Products and Vinyls
Restructuring Cost and Reserve [Line Items]
Restructuring charges								$ 0.4				182.7
Additional restructuring and related expected cost	$ 0.0						$ 0.0		$ 0.0	$ 0.0	$ 0.0	$ 0.0
Total Product Segment Production Capacity Decrease | T															433,000

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RESTRUCTURING CHARGES (Details 2) - USD ($) $ in Millions	3 Months Ended						9 Months Ended		90 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Dec. 31, 2022	Dec. 31, 2021
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	$ 46.1			$ 7.0			$ 46.1	$ 7.0	$ 46.1	$ 13.6	$ 12.3
Restructuring charges	11.9	$ 19.2	$ 60.9	7.6	$ 3.6	$ 3.1	92.0	14.3	388.6
Amounts utilized							(59.5)	(19.6)
Employee severance and related benefit costs
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	11.9			2.6			11.9	2.6	11.9	9.4	6.9
Restructuring charges	2.6	3.3	0.0	0.0	0.0	0.0			32.4
Amounts utilized							(3.4)	(4.3)
Lease and other contract termination costs
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	34.2			4.4			34.2	4.4	34.2	4.2	5.4
Restructuring charges	2.0	1.7	39.7	0.0	0.2	0.1			92.8
Amounts utilized							(13.4)	(1.3)
Facility exit costs
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	0.0			0.0			0.0	0.0	0.0	0.0	0.0
Restructuring charges	7.3	9.3	8.4	4.9	3.1	2.6			103.7
Amounts utilized							(25.0)	(10.6)
Write-off of equipment and facility
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	0.0			0.0			0.0	0.0	0.0	$ 0.0	$ 0.0
Restructuring charges	$ 0.0	$ 4.9	$ 12.8	$ 2.7	$ 0.3	$ 0.4			$ 158.0
Amounts utilized							$ (17.7)	$ (3.4)

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RESTRUCTURING CHARGES (Details 3) - USD ($) $ in Millions	3 Months Ended						9 Months Ended		30 Months Ended	31 Months Ended	32 Months Ended	46 Months Ended	90 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2023	Sep. 30, 2023	Sep. 30, 2023	Sep. 30, 2023
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 11.9	$ 19.2	$ 60.9	$ 7.6	$ 3.6	$ 3.1	$ 92.0	$ 14.3					$ 388.6
Write-off of equipment and facility
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.0	4.9	12.8	2.7	0.3	0.4							158.0
Employee severance and related benefit costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2.6	3.3	0.0	0.0	0.0	0.0							32.4
Facility exit costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	7.3	9.3	8.4	4.9	3.1	2.6							103.7
Employee relocation costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges													1.7
Lease and other contract termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2.0	$ 1.7	$ 39.7	0.0	$ 0.2	$ 0.1							92.8
McIntosh Plan | Chlor Alkali Products and Vinyls
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.7			5.5			4.6	7.1		$ 18.5
McIntosh Plan | Chlor Alkali Products and Vinyls | Write-off of equipment and facility
Restructuring Cost and Reserve [Line Items]
Restructuring charges										2.7
McIntosh Plan | Chlor Alkali Products and Vinyls | Employee severance and related benefit costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges										0.0
McIntosh Plan | Chlor Alkali Products and Vinyls | Facility exit costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges										9.4
McIntosh Plan | Chlor Alkali Products and Vinyls | Employee relocation costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges										0.0
McIntosh Plan | Chlor Alkali Products and Vinyls | Lease and other contract termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges										$ 6.4
Freeport 2021 Plan | Chlor Alkali Products and Vinyls
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.7			0.4			2.8	1.9			$ 11.9
Freeport 2021 Plan | Chlor Alkali Products and Vinyls | Write-off of equipment and facility
Restructuring Cost and Reserve [Line Items]
Restructuring charges											0.0
Freeport 2021 Plan | Chlor Alkali Products and Vinyls | Employee severance and related benefit costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges											0.0
Freeport 2021 Plan | Chlor Alkali Products and Vinyls | Facility exit costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges											11.9
Freeport 2021 Plan | Chlor Alkali Products and Vinyls | Employee relocation costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges											0.0
Freeport 2021 Plan | Chlor Alkali Products and Vinyls | Lease and other contract termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges											$ 0.0
Freeport 2019 Plan | Chlor Alkali Products and Vinyls
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1.9			$ 1.7			4.9	4.9				$ 77.5
Freeport 2019 Plan | Chlor Alkali Products and Vinyls | Write-off of equipment and facility
Restructuring Cost and Reserve [Line Items]
Restructuring charges												58.9
Freeport 2019 Plan | Chlor Alkali Products and Vinyls | Employee severance and related benefit costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges												2.1
Freeport 2019 Plan | Chlor Alkali Products and Vinyls | Facility exit costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges												16.5
Freeport 2019 Plan | Chlor Alkali Products and Vinyls | Employee relocation costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges												0.0
Freeport 2019 Plan | Chlor Alkali Products and Vinyls | Lease and other contract termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges												$ 0.0
Chlor Alkali 2016 Plan | Chlor Alkali Products and Vinyls
Restructuring Cost and Reserve [Line Items]
Restructuring charges								$ 0.4					182.7
Chlor Alkali 2016 Plan | Chlor Alkali Products and Vinyls | Write-off of equipment and facility
Restructuring Cost and Reserve [Line Items]
Restructuring charges													78.1
Chlor Alkali 2016 Plan | Chlor Alkali Products and Vinyls | Employee severance and related benefit costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges													6.7
Chlor Alkali 2016 Plan | Chlor Alkali Products and Vinyls | Facility exit costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges													53.2
Chlor Alkali 2016 Plan | Chlor Alkali Products and Vinyls | Employee relocation costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges													1.7
Chlor Alkali 2016 Plan | Chlor Alkali Products and Vinyls | Lease and other contract termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges													43.0
Epoxy Optimization Plan | Epoxy
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 8.6						$ 79.7						87.7
Epoxy Optimization Plan | Epoxy | Write-off of equipment and facility
Restructuring Cost and Reserve [Line Items]
Restructuring charges													18.3
Epoxy Optimization Plan | Epoxy | Employee severance and related benefit costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges													13.3
Epoxy Optimization Plan | Epoxy | Facility exit costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges													12.7
Epoxy Optimization Plan | Epoxy | Employee relocation costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges													0.0
Epoxy Optimization Plan | Epoxy | Lease and other contract termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges													$ 43.4
Productivity Plan | Corporate/other
Restructuring Cost and Reserve [Line Items]
Restructuring charges									$ 10.3
Productivity Plan | Corporate/other | Write-off of equipment and facility
Restructuring Cost and Reserve [Line Items]
Restructuring charges									0.0
Productivity Plan | Corporate/other | Employee severance and related benefit costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges									10.3
Productivity Plan | Corporate/other | Facility exit costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges									0.0
Productivity Plan | Corporate/other | Employee relocation costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges									0.0
Productivity Plan | Corporate/other | Lease and other contract termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges									$ 0.0

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EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share [Abstract]
Net income	$ 104.5	$ 315.2	$ 403.2	$ 1,130.3
Net income (loss) attributable to noncontrolling interests	0.4	0.0	(4.1)	0.0
Net income attributable to Olin Corporation	$ 104.1	$ 315.2	$ 407.3	$ 1,130.3
Basic shares	124.2	141.2	127.5	148.3
Basic net income attributable to Olin Corporation per share	$ 0.84	$ 2.23	$ 3.19	$ 7.62
Earnings Per Share, Diluted [Abstract]
Basic shares	124.2	141.2	127.5	148.3
Stock-based compensation	2.8	3.1	3.1	3.6
Diluted shares	127.0	144.3	130.6	151.9
Diluted net income attributable to Olin Corporation per share	$ 0.82	$ 2.18	$ 3.12	$ 7.44
Antidilutive Securities Excluded from Computation of Earnings Per Share, Shares	1.3	0.7	1.3	0.7

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ACCOUNTS RECEIVABLES (Details) € in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 EUR (€)	Dec. 31, 2022 USD ($)	Oct. 11, 2022 USD ($)	Dec. 31, 2021 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
2022 Senior Credit Facility	$ 1,550.0		$ 1,550.0
AR Facilities, Amount Outstanding to be Serviced	72.7	$ 91.3	72.7	$ 91.3		$ 111.8		$ 83.3
AR Facilities, Gross receivables sold			749.5	769.3
AR Facilities, Payments received from customers on sold accounts			(788.6)	(761.3)
AR Facilities, Interest Expense	1.3	0.9	3.8	1.8
AR Facilities, Recourse Liability	0.0	0.0	0.0	0.0		0.0
Allowance for Doubtful Accounts	12.8	12.5	12.8	12.5		12.6
Other Receivables	78.0	58.0	78.0	58.0		71.6
United States
Accounts, Notes, Loans and Financing Receivable [Line Items]
AR Facilities, Maximum Outstanding Sales	175.5		175.5
Foreign
Accounts, Notes, Loans and Financing Receivable [Line Items]
AR Facilities, Maximum Outstanding Sales | €					€ 22.0
Receivables Financing Agreement
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables Financing Agreement Maximum Borrowing Capacity							$ 425.0
Receivables Financing Agreement Outstanding Balance	350.0	$ 300.0	350.0	$ 300.0		$ 300.0
Trade Receivables Pledged as Collateral for Secured Borrowings	489.4		489.4
Receivables Financing Agreement Available Borrowing Capacity	$ 7.2		$ 7.2

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INVENTORIES (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Inventory Disclosure [Abstract]
Supplies	$ 150.3	$ 137.6	$ 137.2
Raw materials	178.3	201.2	203.4
Work in process	188.4	199.6	189.6
Finished goods	615.5	559.3	569.2
Inventories excluding LIFO reserve	1,132.5	1,097.7	1,099.4
LIFO reserve	(154.8)	(155.8)	(154.3)
Inventories, net	$ 977.7	$ 941.9	$ 945.1

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OTHER ASSETS (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Other Assets [Abstract]
Supply contracts	$ 1,060.6	$ 1,013.8	$ 1,060.6	$ 1,013.8	$ 1,048.0
Other	56.7	76.9	56.7	76.9	54.5
Other assets	1,117.3	1,090.7	1,117.3	1,090.7	$ 1,102.5
Amortization of Supply Contracts	$ 17.8	$ 17.6	$ 53.4	$ 52.8

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GOODWILL AND INTANGIBLE ASSETS (Details 1) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Line Items]
Goodwill	$ 1,421.0	$ 1,421.2	$ 1,420.9	$ 1,420.6
Goodwill, Foreign Currency Translation Gain (Loss)	0.1	0.6
Chlor Alkali Products and Vinyls
Goodwill [Line Items]
Goodwill	1,275.9	1,276.1	1,275.8	1,275.6
Goodwill, Foreign Currency Translation Gain (Loss)	0.1	0.5
Epoxy
Goodwill [Line Items]
Goodwill	145.1	145.1	$ 145.1	$ 145.0
Goodwill, Foreign Currency Translation Gain (Loss)	$ 0.0	$ 0.1

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GOODWILL AND INTANGIBLE ASSETS (Details 2) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Schedule Of Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	$ 765.5	$ 764.0	$ 755.7
Finite-Lived Intangible Assets, Accumulated Amortization	(516.9)	(490.2)	(476.5)
Finite-Lived Intangible Assets, Net	248.6	273.8	279.2
Customers, customer contracts and relationships
Schedule Of Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	668.0	669.1	662.0
Finite-Lived Intangible Assets, Accumulated Amortization	(426.8)	(401.2)	(389.3)
Finite-Lived Intangible Assets, Net	241.2	267.9	272.7
Acquired technology
Schedule Of Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	92.8	93.1	91.9
Finite-Lived Intangible Assets, Accumulated Amortization	(89.4)	(88.3)	(86.5)
Finite-Lived Intangible Assets, Net	3.4	4.8	5.4
Other
Schedule Of Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	4.7	1.8	1.8
Finite-Lived Intangible Assets, Accumulated Amortization	(0.7)	(0.7)	(0.7)
Finite-Lived Intangible Assets, Net	$ 4.0	$ 1.1	$ 1.1

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DEBT (Details 1) - USD ($) $ in Millions		9 Months Ended
	Oct. 11, 2022	Sep. 30, 2023	Sep. 30, 2022	Feb. 24, 2021
Debt Instrument [Line Items]
Proceeds from Issuance of Debt		$ 587.7	$ 215.0
Long-term Debt Repayments		(381.1)	(415.9)
Proceeds from (Repayments of) Debt		206.6	(200.9)
2022 Senior Credit Facility		1,550.0
Quarterly Required Principal Payment Percent Through 2024	0.625%
Quarterly Required Principal Payment Percent After 2024	1.25%
Senior Revolving Credit Facility
Debt Instrument [Line Items]
Proceeds from Issuance of Debt		255.0	170.0
Long-term Debt Repayments		(90.0)	(170.0)
Receivables Financing Agreement
Debt Instrument [Line Items]
Proceeds from Issuance of Debt		332.7	45.0
Long-term Debt Repayments		(282.7)	(45.0)
$550 Senior Notes Due
Debt Instrument [Line Items]
Long-term Debt Repayments		0.0	(200.0)
Senior Term Loan
Debt Instrument [Line Items]
Long-term Debt Repayments		(6.6)	0.0
Finance Leases
Debt Instrument [Line Items]
Long-term Debt Repayments		(1.8)	$ (0.9)
$1,550.0 Million Secured Credit Facility
Debt Instrument [Line Items]
2022 Senior Credit Facility	$ 1,550.0
350.0 Million Term Loan Facility
Debt Instrument [Line Items]
Term Loan Facility, Maximum Borrowing Capacity	350.0
$800.0 million Senior Revolving Credit Facility
Debt Instrument [Line Items]
Senior Revolving Credit Facility, Maximum Borrowing Capacity				$ 800.0
$1,200.0 million Senior Revolving Credit Facility
Debt Instrument [Line Items]
Senior Revolving Credit Facility, Maximum Borrowing Capacity	$ 1,200.0
Letters of Credit Outstanding, Amount		100.0
Senior Revolving Credit Facility, Remaining Borrowing Capacity		1,034.6
Amount Borrowed Under Senior Revolving Credit Facility
Debt Instrument [Line Items]
Proceeds from Issuance of Debt		165.0
Letters of Credit Issued Under Senior Revolving Credit Facility
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		$ 0.4

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PENSION PLANS AND RETIREMENT BENEFITS (Details 1) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 1.4	$ 2.0	$ 4.2	$ 6.5
Interest cost	26.4	15.1	79.1	46.0
Expected return on plans’ assets	(32.9)	(34.3)	(98.5)	(102.8)
Amortization of prior service cost	(0.1)	0.0	(0.3)	(0.4)
Recognized actuarial loss	0.3	9.0	0.9	26.2
Net periodic benefit (income) cost	(4.9)	(8.2)	(14.6)	(24.5)
Other Postretirement Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	0.1	0.2	0.5	0.8
Interest cost	0.4	0.2	1.3	0.8
Expected return on plans’ assets	0.0	0.0	0.0	0.0
Amortization of prior service cost	0.0	0.0	0.1	0.1
Recognized actuarial loss	0.0	0.1	0.4	1.1
Net periodic benefit (income) cost	$ 0.5	$ 0.5	2.3	2.8
Qualified Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer			$ 1.6	$ 0.9

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PENSION PLANS AND RETIREMENT BENEFITS (Details 2) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Pension Benefits
Service cost	$ 1.4	$ 2.0	$ 4.2	$ 6.5
Interest cost	26.4	15.1	79.1	46.0
Expected return on plans’ assets	(32.9)	(34.3)	(98.5)	(102.8)
Amortization of prior service cost	(0.1)	0.0	(0.3)	(0.4)
Recognized actuarial loss	0.3	9.0	0.9	26.2
Net periodic benefit (income) cost	(4.9)	(8.2)	(14.6)	(24.5)
Other Postretirement Benefits
Service cost	0.1	0.2	0.5	0.8
Interest cost	0.4	0.2	1.3	0.8
Expected return on plans’ assets	0.0	0.0	0.0	0.0
Amortization of prior service cost	0.0	0.0	0.1	0.1
Recognized actuarial loss	0.0	0.1	0.4	1.1
Net periodic benefit (income) cost	$ 0.5	$ 0.5	$ 2.3	$ 2.8

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INCOME TAXES (Details 1) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Effective Tax Rate, Discrete Items, net benefit (expense)	$ 7.2	$ 36.6	$ 24.4	$ 47.5
Effective Tax Rate, Discrete Items, net Percent	23.20%	24.30%	24.10%	24.40%
Statutory Federal Tax Rate	21.00%	21.00%	21.00%	21.00%
Impact on the effective tax rate, if recognized	$ 58.4	$ 44.7	$ 58.4	$ 44.7
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Balance at beginning of year			51.6	43.4
Increases for prior year tax positions			1.3	0.3
Decreases for prior year tax positions			(0.3)	(0.7)
Increases for current year tax positions			10.1	5.9
Foreign currency translation adjustments			(0.6)	(4.1)
Balance at end of period	62.1	$ 44.8	62.1	$ 44.8
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	$ 48.9		$ 48.9

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INCOME TAXES (Details 2)	9 Months Ended
	Sep. 30, 2023
United States | Internal Revenue Service (IRS) | Minimum
Income Tax Examination [Line Items]
Open Tax Year	2018
United States | Internal Revenue Service (IRS) | Maximum
Income Tax Examination [Line Items]
Open Tax Year	2022
United States | State and Local Jurisdiction | Minimum
Income Tax Examination [Line Items]
Open Tax Year	2012
United States | State and Local Jurisdiction | Maximum
Income Tax Examination [Line Items]
Open Tax Year	2022
Canada | Foreign Country | Minimum
Income Tax Examination [Line Items]
Open Tax Year	2016
Canada | Foreign Country | Maximum
Income Tax Examination [Line Items]
Open Tax Year	2022
Brazil | Foreign Country | Minimum
Income Tax Examination [Line Items]
Open Tax Year	2016
Brazil | Foreign Country | Maximum
Income Tax Examination [Line Items]
Open Tax Year	2022
Germany | Foreign Country | Minimum
Income Tax Examination [Line Items]
Open Tax Year	2015
Germany | Foreign Country | Maximum
Income Tax Examination [Line Items]
Open Tax Year	2022
China | Foreign Country | Minimum
Income Tax Examination [Line Items]
Open Tax Year	2014
China | Foreign Country | Maximum
Income Tax Examination [Line Items]
Open Tax Year	2022
The Netherlands | Foreign Country | Minimum
Income Tax Examination [Line Items]
Open Tax Year	2016
The Netherlands | Foreign Country | Maximum
Income Tax Examination [Line Items]
Open Tax Year	2022

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CONTRIBUTING EMPLOYEE OWNERSHIP PLAN (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Defined Contribution Plan Disclosure [Line Items]
Defined Contribution Plan Employer Contribution of Eligible Compensation	$ 8.4	$ 9.6	$ 28.6	$ 28.9
Employer matching contributions to employee ownership plan	$ 3.6	$ 4.0	$ 11.0	$ 10.8
Minimum
Defined Contribution Plan Disclosure [Line Items]
Contribution To Individual Retirement Account Percentage Of Employees Eligible Compensation	5.00%		5.00%
Maximum
Defined Contribution Plan Disclosure [Line Items]
Contribution To Individual Retirement Account Percentage Of Employees Eligible Compensation	7.50%		7.50%

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STOCK-BASED COMPENSATION (Details 1) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Share-Based Payment Arrangement [Abstract]
Stock-based compensation	$ 6.7	$ 5.8	$ 19.5	$ 20.0
Mark-to-market adjustments	(2.3)	(2.0)	(2.4)	(10.5)
Total expense	$ 4.4	$ 3.8	$ 17.1	$ 9.5

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STOCK-BASED COMPENSATION (Details 2) - USD ($)	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance Share Award, Total Shareholder Return Percent	50.00%
Performance Share Award Cycle	3
Performance Share Award, Net Income Percent	50.00%
Black-Sholes Option-Pricing Model
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield	1.32%	1.60%
Risk-free interest rate	4.07%	1.93%
Expected volatility of Olin common stock	47.00%	48.00%
Expected life (years)	7 years	7 years
Weighted-average grant fair value (per option)	$ 28.74	$ 21.18
Weighted-average exercise price	$ 60.55	$ 49.71
Options granted	562,124	742,100
Monte Carlo Simulation Model
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	4.46%	1.74%
Expected volatility of Olin common stock	52.00%	59.00%
Expected life (years)	3 years	3 years
Expected average volatility of peer companies	0.42	0.47
Average correlation coefficient of peer companies	0.51	0.51
Grant date fair value (TSR based award)	$ 86.98	$ 64.13
Grant date fair value (net income based award)	$ 60.55	$ 49.71
Awards granted	161,474	184,000

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SHAREHOLDERS' EQUITY (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022	Jul. 28, 2022
Equity, Class of Treasury Stock [Line Items]
Stock Repurchased and Retired During Period, Value							$ 595.1	$ 1,100.6
Stock options exercised, Shares							800,000	900,000
Stock options exercised, Value							$ 22.3	$ 21.3
Foreign Currency Translation Adjustment
Beginning balance			$ (38.6)			$ (10.9)	(38.6)	(10.9)
Unrealized (losses) gains	$ (3.3)	$ (8.5)	5.5	$ (25.1)	$ (26.0)	(10.5)
Reclassification adjustments of losses (gains) into income	0.0	0.0	0.0	0.0	0.0	0.0
Tax benefit (provision)	0.0	0.0	0.0	0.0	0.0	0.0
Net change							(6.3)	(61.6)
Ending Balance	(44.9)			(72.5)			(44.9)	(72.5)
Gains (Losses) on Derivative Contracts (net of taxes)
Beginning balance			(32.5)			22.8	(32.5)	22.8
Unrealized (losses) gains	(1.9)	(10.7)	(20.8)	6.6	(36.4)	52.8
Reclassification adjustments of losses (gains) into income	10.2	20.5	30.7	(17.8)	(36.1)	(12.4)
Tax benefit (provision)	(2.1)	(2.4)	(2.5)	2.5	17.5	(9.7)
Net change	6.2			(8.7)			21.0	(33.0)
Ending balance	(11.5)			(10.2)			(11.5)	(10.2)
Pension and Other Postretirement Benefits (net of taxes)
Beginning balance			(424.8)			(499.9)	(424.8)	(499.9)
Unrealized (losses) gains	0.0	0.0	0.0	0.0	0.0	0.0
Reclassification adjustments of losses (gains) into income	0.2	0.5	0.4	9.1	9.0	8.9
Tax benefit (provision)	0.0	(0.1)	(0.1)	(2.1)	(2.3)	(2.3)
Net change							0.9	20.3
Ending balance	(423.9)			(479.6)			(423.9)	(479.6)
Accumulated Other Comprehensive Loss
Beginning balance			(495.9)			(488.0)	(495.9)	(488.0)
Unrealized (losses) gains	(5.2)	(19.2)	(15.3)	(18.5)	(62.4)	42.3
Reclassification adjustments of losses (gains) into income	10.4	21.0	31.1	(8.7)	(27.1)	(3.5)
Tax benefit (provision)	(2.1)	$ (2.5)	$ (2.6)	0.4	$ 15.2	$ (12.0)
Net change							15.6	(74.3)
Ending balance	(480.3)			$ (562.3)			$ (480.3)	$ (562.3)
Common Stock
Equity, Class of Treasury Stock [Line Items]
Stock Repurchased and Retired During Period, Shares							10,800,000	20,800,000
Common Stock | 2022 Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Authorized share repurchase program (in dollars)									$ 2,000.0
Stock Repurchased and Retired During Period, Shares							16,700,000
Stock Repurchased and Retired During Period, Value							$ 887.9
Remaining authorized repurchase amount (in dollars)	$ 1,112.1						$ 1,112.1

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SEGMENT INFORMATION (Details 1) - USD ($) $ in Millions	3 Months Ended						9 Months Ended		90 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023
Sales [Abstract]
Sales	$ 1,671.4			$ 2,321.7			$ 5,218.4	$ 7,399.2
Income (loss) before taxes:
Income (loss) before taxes	126.7			367.9			499.4	1,432.2
Corporate/Other:
Environmental expense	6.9			7.4			23.1	18.0
Restructuring charges	(11.9)	$ (19.2)	$ (60.9)	(7.6)	$ (3.6)	$ (3.1)	(92.0)	(14.3)	$ (388.6)
Other operating (expense) income	(0.3)			13.0			27.2	16.3
Interest expense	(46.2)			(36.0)			(133.9)	(103.4)
Interest income	1.0			0.5			3.2	1.2
Non-operating pension income	5.9			9.9			17.0	29.0
Gain on the sale of domestic private trucking fleet and operations
Corporate/Other:
Other operating (expense) income							27.0
Gain for the sale of two former manufacturing facilities
Corporate/Other:
Other operating (expense) income								13.0
Corporate/other
Corporate/Other:
Environmental expense	6.9			7.4			23.1	18.0
Other corporate and unallocated costs	(22.9)			(27.5)			(79.6)	(92.8)
Restructuring charges	(11.9)			(7.6)			(92.0)	(14.3)
Chlor Alkali Products and Vinyls
Sales [Abstract]
Sales	969.6			1,263.5			3,089.0	3,912.2
Income (loss) before taxes:
Income (loss) before taxes	172.3			253.9			598.3	929.0
Epoxy
Sales [Abstract]
Sales	321.6			644.1			1,016.1	2,206.3
Income (loss) before taxes:
Income (loss) before taxes	(28.8)			80.1			(7.9)	358.0
Winchester
Sales [Abstract]
Sales	380.2			414.1			1,113.3	1,280.7
Income (loss) before taxes:
Income (loss) before taxes	$ 64.5			$ 89.0			$ 190.2	$ 327.2

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SEGMENT INFORMATION (Details 2) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Sales	$ 1,671.4	$ 2,321.7	$ 5,218.4	$ 7,399.2
United States
Disaggregation of Revenue [Line Items]
Sales	1,110.1	1,449.0	3,484.5	4,513.6
Europe
Disaggregation of Revenue [Line Items]
Sales	162.5	368.7	477.5	1,254.4
Other foreign
Disaggregation of Revenue [Line Items]
Sales	398.8	504.0	1,256.4	1,631.2
Chlor Alkali Products and Vinyls
Disaggregation of Revenue [Line Items]
Sales	969.6	1,263.5	3,089.0	3,912.2
Chlor Alkali Products and Vinyls | United States
Disaggregation of Revenue [Line Items]
Sales	651.0	870.8	2,069.8	2,636.6
Chlor Alkali Products and Vinyls | Europe
Disaggregation of Revenue [Line Items]
Sales	57.9	80.9	175.3	233.7
Chlor Alkali Products and Vinyls | Other foreign
Disaggregation of Revenue [Line Items]
Sales	260.7	311.8	843.9	1,041.9
Epoxy
Disaggregation of Revenue [Line Items]
Sales	321.6	644.1	1,016.1	2,206.3
Epoxy | United States
Disaggregation of Revenue [Line Items]
Sales	131.4	201.0	431.8	696.7
Epoxy | Europe
Disaggregation of Revenue [Line Items]
Sales	84.8	280.3	258.8	993.7
Epoxy | Other foreign
Disaggregation of Revenue [Line Items]
Sales	105.4	162.8	325.5	515.9
Winchester
Disaggregation of Revenue [Line Items]
Sales	380.2	414.1	1,113.3	1,280.7
Winchester | United States
Disaggregation of Revenue [Line Items]
Sales	327.7	377.2	982.9	1,180.3
Winchester | Europe
Disaggregation of Revenue [Line Items]
Sales	19.8	7.5	43.4	27.0
Winchester | Other foreign
Disaggregation of Revenue [Line Items]
Sales	$ 32.7	$ 29.4	$ 87.0	$ 73.4

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SEGMENT INFORMATION (Details 3) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Sales	$ 1,671.4	$ 2,321.7	$ 5,218.4	$ 7,399.2
Chlor Alkali Products and Vinyls
Disaggregation of Revenue [Line Items]
Sales	969.6	1,263.5	3,089.0	3,912.2
Chlor Alkali Products and Vinyls | Caustic soda
Disaggregation of Revenue [Line Items]
Sales	422.3	598.4	1,424.0	1,752.4
Chlor Alkali Products and Vinyls | Chlorine, chlorine-derivatives and other co-products
Disaggregation of Revenue [Line Items]
Sales	547.3	665.1	1,665.0	2,159.8
Epoxy
Disaggregation of Revenue [Line Items]
Sales	321.6	644.1	1,016.1	2,206.3
Epoxy | Aromatics and allylics
Disaggregation of Revenue [Line Items]
Sales	116.9	316.8	387.9	1,092.9
Epoxy | Epoxy resins
Disaggregation of Revenue [Line Items]
Sales	204.7	327.3	628.2	1,113.4
Winchester
Disaggregation of Revenue [Line Items]
Sales	380.2	414.1	1,113.3	1,280.7
Winchester | Commercial
Disaggregation of Revenue [Line Items]
Sales	181.2	271.6	581.1	906.4
Winchester | Military and law enforcement
Disaggregation of Revenue [Line Items]
Sales	$ 199.0	$ 142.5	$ 532.2	$ 374.3

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ENVIRONMENTAL (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Environmental Remediation Obligations [Abstract]
Reserves for future environmental expenditures - total	$ 153.5	$ 149.3	$ 153.5	$ 149.3	$ 146.6
Reserves for future environmental expenditures - noncurrent	128.5	124.3	128.5	124.3	$ 121.6
Environmental Remediation Expense	$ 6.9	$ 7.4	$ 23.1	$ 18.0

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COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Legal action accrued liabilities	$ 15.3	$ 14.4	$ 14.2

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DERIVATIVE FINANCIAL INSTRUMENTS (Details Textuals) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Derivative [Line Items]
Notional amount	$ 207.5	$ 261.2	$ 272.1
Forward Contracts Buy
Derivative [Line Items]
Notional amount	5.3	275.8	273.6
Forward Contracts Sell
Derivative [Line Items]
Notional amount	155.2	$ 110.7	$ 96.0
Commodity Contract
Derivative [Line Items]
Cash Flow Hedges Derivative Instruments at Fair Value, Net	(15.5)
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	$ (12.6)

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DERIVATIVE FINANCIAL INSTRUMENTS (Details 1) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Derivative [Line Items]
Notional amount	$ 207.5	$ 261.2	$ 272.1
Forward Contracts Buy
Derivative [Line Items]
Notional amount	5.3	275.8	273.6
Forward Contracts Sell
Derivative [Line Items]
Notional amount	155.2	110.7	96.0
Natural Gas Commodity Forward Contracts
Derivative [Line Items]
Notional amount	67.2	107.6	92.1
Ethane Commodity Forward Contracts
Derivative [Line Items]
Notional amount	25.5	46.0	45.5
Metals Commodity Forward Contracts
Derivative [Line Items]
Notional amount	$ 114.8	$ 107.6	$ 134.5

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DERIVATIVE FINANCIAL INSTRUMENTS (Details 2) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Derivatives, Fair Value [Line Items]
Asset derivatives	$ (5.6)	$ (5.8)	$ (18.4)
Liability derivatives	(20.0)	(49.9)	(34.0)
Other Current Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	(2.4)	(1.8)	(14.7)
Other Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	(3.2)	(4.0)	(3.7)
Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	(17.8)	(42.5)	(31.4)
Other Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	(2.2)	(7.4)	(2.6)
Commodity Contracts Gains | Designated as Hedging Instrument | Other Current Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	(1.7)	(2.4)	(15.1)
Commodity Contracts Gains | Designated as Hedging Instrument | Other Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	(3.2)	(4.0)	(3.8)
Commodity Contracts Gains | Designated as Hedging Instrument | Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	1.5	1.7	6.8
Commodity Contracts Gains | Designated as Hedging Instrument | Other Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	0.3	0.6	0.0
Commodity Contracts Losses | Designated as Hedging Instrument | Other Current Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	0.4	0.9	1.5
Commodity Contracts Losses | Designated as Hedging Instrument | Other Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	0.0	0.0	0.1
Commodity Contracts Losses | Designated as Hedging Instrument | Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	(19.3)	(43.3)	(34.7)
Commodity Contracts Losses | Designated as Hedging Instrument | Other Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	(2.5)	(8.0)	(2.6)
Foreign Exchange Contract Gain | Not Designated as Hedging Instrument | Other Current Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	(1.2)	(0.3)	(1.3)
Foreign Exchange Contract Gain | Not Designated as Hedging Instrument | Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	0.0	0.8	1.8
Foreign Exchange Contract Loss | Not Designated as Hedging Instrument | Other Current Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	0.1	0.0	0.2
Foreign Exchange Contract Loss | Not Designated as Hedging Instrument | Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	$ 0.0	$ (1.7)	$ (5.3)

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DERIVATIVE FINANCIAL INSTRUMENTS (Details 3) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Recognized in other comprehensive loss:	$ (1.9)	$ (10.7)	$ (20.8)	$ 6.6	$ (36.4)	$ 52.8
Commodity Contract | Cost of goods sold | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss)	0.0			0.0			$ (0.6)	$ 0.5
Commodity Contract | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Recognized in other comprehensive loss:	(1.9)			6.6			(33.4)	23.0
Commodity Contract | Cash Flow Hedging | Cost of goods sold
Derivative Instruments, Gain (Loss) [Line Items]
Reclassified from accumulated other comprehensive loss into income:	(10.2)			17.8			(61.4)	66.3
Foreign Exchange Contract | Selling and administration | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss)	$ 3.6			$ (15.6)			$ (9.6)	$ (42.7)

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FAIR VALUE MEASUREMENTS (Details Textuals) - Nonrecurring - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 0.0	$ 0.0	$ 0.0
Liabilities, Fair Value Disclosure	$ 0.0	$ 0.0	$ 0.0

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FAIR VALUE MEASUREMENTS (Details 1) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	$ 5.6	$ 5.8	$ 18.4
Derivative Liability	20.0	49.9	34.0
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0.0	0.0	0.0
Derivative Liability	0.0	0.0	0.0
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	5.6	5.8	18.4
Derivative Liability	20.0	49.9	34.0
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0.0	0.0	0.0
Derivative Liability	0.0	0.0	0.0
Commodity Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	4.5	5.5	17.3
Derivative Liability	20.0	49.0	30.5
Commodity Contract | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0.0	0.0	0.0
Derivative Liability	0.0	0.0	0.0
Commodity Contract | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	4.5	5.5	17.3
Derivative Liability	20.0	49.0	30.5
Commodity Contract | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0.0	0.0	0.0
Derivative Liability	0.0	0.0	0.0
Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	1.1	0.3	1.1
Derivative Liability		0.9	3.5
Foreign Exchange Contract | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0.0	0.0	0.0
Derivative Liability		0.0	0.0
Foreign Exchange Contract | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	1.1	0.3	1.1
Derivative Liability		0.9	3.5
Foreign Exchange Contract | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	$ 0.0	0.0	0.0
Derivative Liability		$ 0.0	$ 0.0

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FAIR VALUE MEASUREMENTS (Details 2) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Fair Value, Inputs, Level 2
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Long-term Debt, Fair Value	$ 2,666.9	$ 2,517.7	$ 2,386.5

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SUBSEQUENT EVENT (Details) $ in Millions	Oct. 01, 2023 USD ($)
Subsequent Event [Line Items]
Payments to Acquire Businesses, Gross	$ 63.7