10-Q

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

(Mark One)

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

For the quarterly period ended September 30, 2011

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	63105-3443
(Address of principal executive offices)	(Zip Code)

(314) 480-1400

(Registrant’s telephone number, including area code)

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  x No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x No  o

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

Large accelerated filer  x Accelerated filer  ¨ Non-accelerated filer  ¨ (Do not check if a smaller reporting company)

Smaller reporting company ¨

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

As of September 30, 2011, 80,162,837 shares of the registrant’s common stock were outstanding.

1

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, 2011			December 31, 2010			September 30, 2010
ASSETS
Current assets:
Cash and cash equivalents	$	318.3		$	458.6		$	393.4
Receivables, net		290.5			186.9			231.1
Income tax receivable		2.2			6.1			12.5
Inventories		166.3			155.6			157.3
Current deferred income taxes		50.4			46.0			40.9
Other current assets		11.1			29.6			17.6
Total current assets		838.8			882.8			852.8
Property, plant and equipment (less accumulated depreciation of $1,122.1, $1,068.1 and $1,048.2)		821.3			675.0			683.8
Prepaid pension costs		46.1			16.3			33.7
Restricted cash		71.6			102.0			—
Other assets		86.8			72.3			92.2
Goodwill		627.4			300.3			300.3
Total assets	$	2,492.0		$	2,048.7		$	1,962.8
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current liabilities:
Current installments of long-term debt	$	87.8		$	77.8		$	1.8
Accounts payable		129.6			115.5			107.9
Accrued liabilities		237.6			197.7			189.5
Total current liabilities		455.0			391.0			299.2
Long-term debt		501.8			418.2			385.1
Accrued pension liability		55.2			58.6			50.4
Deferred income taxes		113.5			23.5			39.8
Other liabilities		359.3			327.1			330.9
Total liabilities		1,484.8			1,218.4			1,105.4
Commitments and contingencies
Shareholders’ equity:
Common stock, par value $1 per share:  authorized, 120.0 shares;    issued and outstanding 80.2, 79.6 and 79.6 shares		80.2			79.6			79.6
Additional paid-in capital		852.4			842.3			840.1
Accumulated other comprehensive loss		(270.6	)		(261.8	)		(246.3	)
Retained earnings		345.2			170.2			184.0
Total shareholders’ equity		1,007.2			830.3			857.4
Total liabilities and shareholders’ equity	$	2,492.0		$	2,048.7		$	1,962.8

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

2

OLIN CORPORATION AND CONSOLIDATED SUBSIDIARIES

Condensed Statements of Income

(In millions, except per share data)

(Unaudited)

	Three Months Ended September 30,					Nine Months Ended September 30,
	2011			2010		2011		2010
Sales	$	550.2		$	432.8	$	1,515.3	$	1,200.5
Operating expenses:
Cost of goods sold		432.7			366.5		1,205.6		1,026.7
Selling and administration		39.8			33.3		121.8		101.3
Restructuring charges		4.1			—		6.6		—
Other operating income		4.3			0.3		5.9		2.6
Operating income		77.9			33.3		187.2		75.1
Earnings of non-consolidated affiliates		0.8			11.6		8.5		22.8
Interest expense		7.9			6.4		22.5		19.5
Interest income		0.2			0.3		0.7		0.7
Other (expense) income		(1.6	)		—		179.0		0.1
Income before taxes		69.4			38.8		352.9		79.2
Income tax provision		22.2			7.0		129.9		16.4
Net income	$	47.2		$	31.8	$	223.0	$	62.8
Net income per common share:
Basic	$	0.59		$	0.40	$	2.79	$	0.79
Diluted	$	0.58		$	0.40	$	2.76	$	0.79
Dividends per common share	$	0.20		$	0.20	$	0.60	$	0.60
Average common shares outstanding:
Basic		80.2			79.4		79.9		79.1
Diluted		80.8			80.2		80.8		79.8

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 Shareholders’ Equity

(In millions, except per share data)

(Unaudited)

							Additional Paid-In Capital			Accumulated Other Comprehensive Loss			Retained Earnings			Total Shareholders’ Equity
	Common Stock
	Shares Issued			Par Value
Balance at January 1, 2010		78.7		$	78.7		$	823.1		$	(248.2	)	$	168.7		$	822.3
Comprehensive income:
Net income		—			—			—			—			62.8			62.8
Translation adjustment		—			—			—			(0.6	)		—			(0.6	)
Net unrealized loss		—			—			—			(4.9	)		—			(4.9	)
Amortization of prior service costs and actuarial losses, net		—			—			—			7.4			—			7.4
Comprehensive income																	64.7
Dividends paid:
Common stock ($0.60 per share)		—			—			—			—			(47.5	)		(47.5	)
Common stock issued for:
Stock options exercised		0.2			0.2			2.3			—			—			2.5
Employee benefit plans		0.6			0.6			9.6			—			—			10.2
Other transactions		0.1			0.1			2.2			—			—			2.3
Stock-based compensation		—			—			2.9			—			—			2.9
Balance at September 30, 2010		79.6		$	79.6		$	840.1		$	(246.3	)	$	184.0		$	857.4
Balance at January 1, 2011		79.6		$	79.6		$	842.3		$	(261.8	)	$	170.2		$	830.3
Comprehensive income:
Net income		—			—			—			—			223.0			223.0
Translation adjustment		—			—			—			2.3			—			2.3
Net unrealized loss		—			—			—			(20.2	)		—			(20.2	)
Amortization of prior service costs and actuarial losses, net		—			—			—			9.1			—			9.1
Comprehensive income																	214.2
Dividends paid:
Common stock ($0.60 per share)		—			—			—			—			(48.0	)		(48.0	)
Common stock repurchased and retired		(0.1	)		(0.1	)		(2.1	)		—			—			(2.2	)
Common stock issued for:
Stock options exercised		0.5			0.5			8.8			—			—			9.3
Other transactions		0.2			0.2			3.6			—			—			3.8
Stock-based compensation		—			—			(0.2	)		—			—			(0.2	)
Balance at September 30, 2011		80.2		$	80.2		$	852.4		$	(270.6	)	$	345.2		$	1,007.2

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 Cash Flows

(In millions)

(Unaudited)

	Nine Months Ended September 30,
	2011			2010
Operating Activities
Net income	$	223.0		$	62.8
Adjustments to reconcile net income to net cash and cash equivalents provided by (used for) operating activities:
Gain on remeasurement of investment in SunBelt		(181.4	)		—
Earnings of non-consolidated affiliates		(8.5	)		(22.8	)
Other operating income – gains on disposition of property, plant and equipment		(4.8	)		(1.5	)
Stock-based compensation		4.3			5.1
Depreciation and amortization		74.1			64.8
Deferred income taxes		93.1			22.1
Qualified pension plan contributions		(0.7	)		(7.3	)
Qualified pension plan income		(19.5	)		(18.4	)
Common stock issued under employee benefit plans		—			1.0
Change in:
Receivables		(79.6	)		(47.8	)
Income taxes receivable		3.5			6.9
Inventories		(6.7	)		(33.5	)
Other current assets		0.3			0.1
Accounts payable and accrued liabilities		11.6			10.4
Other assets		(0.2	)		(1.6	)
Other noncurrent liabilities		6.1			0.9
Other operating activities		(2.2	)		(0.1	)
Net operating activities		112.4			41.1
Investing Activities
Capital expenditures		(128.4	)		(63.4	)
Business acquired in purchase transaction, net of cash acquired		(123.4	)		—
Proceeds from disposition of property, plant and equipment		6.2			2.9
Distributions from affiliated companies, net		1.1			9.5
Restricted cash activity		30.4			—
Other investing activities		2.3			(0.5	)
Net investing activities		(211.8	)		(51.5	)
Financing Activities
Long-term debt repayments		—			(18.9	)
Issuance of common stock		—			9.2
Common stock repurchased and retired		(2.2	)		—
Stock options exercised		7.3			2.3
Excess tax benefits from stock options exercised		2.0			0.2
Dividends paid		(48.0	)		(47.5	)
Net financing activities		(40.9	)		(54.7	)
Net decrease in cash and cash equivalents		(140.3	)		(65.1	)
Cash and cash equivalents, beginning of period		458.6			458.5
Cash and cash equivalents, end of period	$	318.3		$	393.4
Cash paid (received) for interest and income taxes:
Interest	$	19.6		$	20.0
Income taxes, net of refunds	$	34.4		$	(5.6	)
Non-cash investing activities:
Capital expenditures included in accounts payable and accrued liabilities	$	(4.2	)	$	10.0

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

5

OLIN CORPORATION AND CONSOLIDATED SUBSIDIARIES

Notes to Condensed Financial Statements

(Unaudited)

DESCRIPTION OF BUSINESS

Olin Corporation is a Virginia corporation, incorporated in 1892.  We are a manufacturer concentrated in two business segments:  Chlor Alkali Products and Winchester.  Chlor Alkali Products, with nine U.S. manufacturing facilities and one Canadian manufacturing facility, produces chlorine and caustic soda, hydrochloric acid, hydrogen, bleach products and potassium hydroxide.  Winchester, with its principal manufacturing facilities in East Alton, IL and Oxford, MS, produces and distributes sporting ammunition, reloading components, small caliber military ammunition and components, and industrial cartridges.

We have prepared the condensed financial statements included herein, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (SEC).  The preparation of the consolidated 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, 2010.  Certain reclassifications were made to prior year amounts to conform to the 2011 presentation.

On February 28, 2011, we acquired PolyOne Corporation’s (PolyOne) 50% interest in the SunBelt Chlor Alkali Partnership, which we refer to as SunBelt.  Previously, we had a 50% ownership interest in SunBelt, which was accounted for using the equity method of accounting.  Accordingly, we included only our share of SunBelt results in earnings of non-consolidated affiliates.  Since the date of acquisition, SunBelt’s results are no longer included in earnings of non-consolidated affiliates but are consolidated in our accompanying financial statements.

ACQUISITION

On February 28, 2011, we acquired PolyOne’s 50% interest in SunBelt for $132.3 million in cash plus the assumption of a PolyOne guarantee related to the SunBelt Notes.  With this acquisition, Olin now owns 100% of SunBelt.  The SunBelt chlor alkali plant, which is located within our McIntosh, AL facility, has approximately 350,000 tons of membrane technology capacity.  We also agreed to a three year earn out, which has no guaranteed minimum or maximum, based on the performance of SunBelt.  In addition, during the second quarter of 2011, we remitted to PolyOne $6.0 million, which represented 50% of distributable cash generated by SunBelt from January 1, 2011 through February 28, 2011.

Pursuant to a note purchase agreement dated December 22, 1997, SunBelt sold $97.5 million of Guaranteed Senior Secured Notes due 2017, Series O, and $97.5 million of Guaranteed Senior Secured Notes due 2017, Series G.  We refer to these notes as the SunBelt Notes.  The SunBelt Notes bear interest at a rate of 7.23% per annum, payable semi-annually in arrears on each June 22 and December 22.  Beginning on December 22, 2002 and each year through 2017, SunBelt is required to repay $12.2 million of the SunBelt Notes, of which $6.1 million is attributable to the Series O Notes and of which $6.1 million is attributable to the Series G Notes.  In conjunction with the acquisition, we consolidated the SunBelt Notes with a remaining principal balance of $85.3 million.

6

We have guaranteed the Series O Notes, and PolyOne, our former SunBelt partner, has guaranteed the Series G Notes, in both cases pursuant to customary guaranty agreements.  We have agreed to indemnify PolyOne for any payments or other costs under the guarantee in favor of the purchasers of the Series G Notes, to the extent any payments or other costs arise from a default or other breach under the SunBelt Notes.  If SunBelt does not make timely payments on the SunBelt Notes, whether as a result of a failure to pay on a guarantee or otherwise, the holders of the SunBelt Notes may proceed against the assets of SunBelt for repayment.

From January 1, 2011 to February 28, 2011, we recorded $6.3 million of equity earnings of non-consolidated affiliates for our 50% ownership in SunBelt.  The value of our investment in SunBelt was $(0.8) million.  We remeasured our equity interest in SunBelt to fair value upon the close of the transaction.  As a result, we recognized a pretax gain of $181.4 million, which was classified in other (expense) income in our condensed statement of income.  In conjunction with this remeasurement, a discrete deferred tax expense of $76.0 million was recorded.

The transaction has been accounted for using the acquisition method of accounting which requires, among other things, that assets acquired and liabilities assumed be recognized at their fair values as of the acquisition date.  We finalized our purchase price allocation during the second quarter of 2011.  The adjustments to the purchase price allocation from March 31, 2011 were primarily the result of finalizing estimates for intangible assets and goodwill.  The following table summarizes the final allocation of the purchase price to SunBelt’s assets and liabilities:

	February 28, 2011
	($ in millions)
Total current assets	$	37.6
Property, plant and equipment		87.4
Deferred income taxes		0.4
Other assets		5.8
Total assets acquired		131.2
Total current liabilities		42.7
Long-term debt		75.1
Other liabilities		27.6
Total liabilities assumed		145.4
Less:  Investment in SunBelt		(0.8	)
Net liabilities assumed		(13.4	)
Liabilities for uncertainties		48.3
Gain on remeasurement of investment in SunBelt		(181.4	)
Goodwill		327.1
Fair value of assets acquired	$	180.6

Included in total current assets are cash and cash equivalents of $8.9 million.  Included in total current liabilities is $12.2 million of current installments of long-term debt.

7

Based on final valuations, we allocated $5.8 million of the purchase price to intangible assets relating to customers, customer contracts and relationships, which management estimates to have a useful life of fifteen years.  These identifiable intangible assets were included in other assets.  Based on final valuations, $327.1 million was assigned to goodwill.  The preliminary value assigned to goodwill as of March 31, 2011 was $327.9 million.  For tax purposes, $163.7 million of the goodwill is deductible.  The goodwill represents the remeasurement of our previously held 50% equity interest in SunBelt and the benefits of the acquisition that are in addition to the fair values of the other net assets acquired.  The primary reason for the acquisition and the principal factors that contributed to a SunBelt purchase price that resulted in the recognition of goodwill is the cost savings available from operating the business under a single owner and our ability to fully utilize SunBelt’s low cost membrane capacity in lieu of higher cost diaphragm capacity.  The cost saving opportunities include operational efficiencies in logistics, purchasing and manufacturing.

Goodwill recorded in the acquisition is not amortized but will be reviewed for impairment annually in the fourth quarter and/or when circumstances or other events indicate that impairment may have occurred.

For segment reporting purposes, SunBelt has been included in Chlor Alkali Products.  The SunBelt results of operations have been included in our consolidated results for the period subsequent to the effective date of the acquisition.  Our consolidated results for the three months ended September 30, 2011 included $58.9 million of SunBelt sales and $11.7 million of additional SunBelt pretax income ($14.4 million included in Chlor Alkali Products segment income; less $1.0 million of interest expense and $1.7 million of expense for our earn out liability).  Our consolidated results for the nine months ended September 30, 2011 included $125.0 million of SunBelt sales and $23.2 million of additional SunBelt pretax income ($29.4 million included in Chlor Alkali Products segment income; less $0.8 million of acquisition costs, $2.8 million of interest expense and $2.6 million of expense for our earn out liability) on the 50% interest we acquired.  The following pro forma summary presents the condensed statements of income as if the acquisition of SunBelt had occurred on January 1, 2010.

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2010		2011		2010
	($ in millions, except per share data)
Sales	$	484.4	$	1,541.6	$	1,321.1
Net income		44.9		121.9		86.4
Net income per common share:
Basic	$	0.57	$	1.53	$	1.09
Diluted	$	0.56	$	1.51	$	1.08

8

The pro forma statements of income were prepared based on historical financial information and have been adjusted to give effect to pro forma adjustments that are (i) directly attributable to the transaction, (ii) factually supportable and (iii) expected to have a continuing impact on the combined results.  The pro forma statements of income use estimates and assumptions based on information available at the time.  Management believes the estimates and assumptions to be reasonable; however, actual results may differ significantly from this pro forma financial information.  The pro forma information does not reflect any cost savings that might be achieved from operating the business under a single owner and is not intended to reflect the actual results that would have occurred had the companies actually been combined during the periods presented.  The pro forma data reflect the application of the following adjustments:

           ·   Elimination of the pretax gain resulting from the remeasurement of our previously held 50% equity interest in SunBelt, which is considered non-recurring ($181.4 million for the nine months ended September 30, 2011).

           ·   Additional amortization expense related to the fair value of acquired identifiable intangible assets ($0.1 million for the three months ended September 30, 2010, and $0.1 million and $0.3 million for the nine months ended September 30, 2011 and 2010, respectively).

           ·   Reduction of depreciation expense related to the fair value adjustment to property, plant and equipment ($1.4 million for the three months ended September 30, 2010, and $1.0 million and $4.3 million for the nine months ended September 30, 2011 and 2010, respectively).

           ·   Reduction in interest expense as a result of increasing the carrying value of acquired debt obligations to its estimated fair value ($0.2 million for the three months ended September 30, 2010, and $0.1 million and $0.4 million for the nine months ended September 30, 2011 and 2010, respectively).

           ·   Additional accretion expense for the earn out liability that was recorded as a result of the acquisition ($0.6 million for the three months ended September 30, 2010, and $0.4 million and $1.9 million for the nine months ended September 30, 2011 and 2010, respectively).

           ·   Elimination of transaction costs incurred in 2011 that are directly related to the transaction, and do not have a continuing impact on our combined operating results ($0.8 million for the nine months ended September 30, 2011).

In addition, the pro forma data reflect the tax effect of all of the above adjustments.  The pro forma tax provision for the nine months ended September 30, 2011 reflects a reduction of $76.0 million related to the elimination of the gain resulting from the remeasurement of our previously held 50% equity interest in SunBelt.  The pro forma tax provision reflects an increase of $3.4 million for the three months ended September 30, 2010, and $2.3 million and $6.1 million for the nine months ended September 30, 2011 and 2010, respectively, associated with the incremental pretax income and the fair value adjustments for acquired intangible assets, property, plant and equipment and the SunBelt Notes, which reflects the marginal tax of the adjustments in the various jurisdictions where such adjustments occurred.

9

RESTRUCTURING CHARGES

On December 9, 2010, our board of directors approved a plan to convert the 260,000 tons of mercury cell capacity at our Charleston, TN facility to 200,000 tons of membrane capacity capable of producing both potassium hydroxide and caustic soda.  The project has an estimated capital cost of approximately $160 million.  The board of directors also approved plans to reconfigure our Augusta, GA facility to manufacture bleach and distribute caustic soda, while discontinuing chlor alkali manufacturing at this site.  This action will reduce our chlor alkali manufacturing capacity by 100,000 tons.  We based our decision to convert and reconfigure on several factors.  First, during 2009 and 2010 we had experienced a steady increase in the number of customers unwilling to accept our products manufactured using mercury cell technology.  Second, there was federal legislation that was passed in 2008 governing the treatment of mercury that significantly limits our recycling options after December 31, 2012.  We concluded that exiting mercury cell technology production after 2012 represented an unacceptable future cost risk.  Further, the conversion of the Charleston, TN plant to membrane technology will reduce the electricity usage per ECU produced by approximately 25% and the configuration of the new plant will result in an increase in our capacity to produce potassium hydroxide.  The decision to reconfigure the Augusta, GA facility to manufacture bleach and distribute caustic soda removes the highest cost production capacity from our system.  We currently expect to complete the conversion and reconfiguration by the end of 2012.  We recorded a pretax restructuring charge of $28.0 million associated with these actions in the fourth quarter of 2010.  The restructuring charge included write-off of equipment and facility costs of $17.5 million, acceleration of asset retirement obligations of $6.7 million, employee severance and related benefit costs of $2.8 million and lease and other contract termination costs of $1.0 million.  For the three and nine months ended September 30, 2011, we recorded pretax restructuring charges of $2.0 million and $2.3 million, respectively, for employee severance and related benefit costs and facility exit costs.  We expect to incur additional restructuring charges through 2014 of approximately $8 million related to the implementation of plans to exit the use of mercury cell technology in the chlor alkali manufacturing process.

On November 3, 2010, we announced that we made the decision to relocate the Winchester centerfire ammunition operations from East Alton, IL to Oxford, MS.  This relocation, when completed, is forecast to reduce Winchester’s annual operating costs by approximately $30 million.  Consistent with this decision we have initiated an estimated $110 million five-year project, which includes approximately $80 million of capital spending.  The State of Mississippi and local governments have provided incentives which should offset approximately 40 percent of the capital spending.  We recorded a pretax restructuring charge of $6.2 million associated with these actions in the fourth quarter of 2010.  The restructuring charge included employee severance and related benefit costs of $3.2 million and a non-cash pension and other postretirement benefits curtailment charge of $3.0 million.  For the three and nine months ended September 30, 2011, we recorded additional pretax restructuring charges of $2.1 million and $4.3 million, respectively, for employee severance and related benefits costs, a non-cash pension curtailment charge, employee relocation costs and facility exit costs.  These restructuring charges related primarily to the second quarter 2011 ratification of a new five and one half year Winchester, East Alton, IL union labor agreement.  We expect to incur additional restructuring charges through 2016 of approximately $18 million related to the transfer of these operations.

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The following table summarizes the 2011 activity by major component of these restructuring actions and the remaining balances of accrued restructuring costs as of September 30, 2011:

	Employee severance and job related benefits			Pension and other postretirement benefits curtailment			Lease and other contract termination costs			Employee relocation costs			Facility exit costs			Total
	($ in millions)
Balance at January 1, 2011	$	6.0		$	—		$	1.0		$	—		$	—		$	7.0
2011 restructuring charges		3.7			1.1			—			1.3			0.5			6.6
Amounts utilized		(0.2	)		(1.1	)		(0.2	)		(1.3	)		(0.5	)		(3.3	)
Balance at September 30, 2011	$	9.5		$	—		$	0.8		$	—		$	—		$	10.3

As of September 30, 2011, we have incurred cash expenditures of $2.2 million related to these restructuring actions.  The majority of the remaining balance of $10.3 million is expected to be paid out in 2012 through 2016.

ALLOWANCE FOR DOUBTFUL ACCOUNTS RECEIVABLES

We evaluate the collectibility of accounts receivable based on a combination of factors.  We estimate an allowance for doubtful accounts as a percentage of net sales based on historical bad debt experience.  This estimate is periodically adjusted when we become aware of a specific customer's inability to meet its financial obligations (e.g., bankruptcy filing) or as a result of changes in the overall aging of accounts receivable.  While we have a large number of customers that operate in diverse businesses and are geographically dispersed, a general economic downturn in any of the industry segments in which we operate could result in higher than expected defaults, and, therefore, the need to revise estimates for the provision for doubtful accounts could occur.

Allowance for doubtful accounts receivable consisted of the following:

	September 30,
	2011			2010
	($ in millions)
Balance at beginning of year	$	4.8		$	3.3
Provisions charged		0.8			0.2
(Write-offs) recoveries, net		(1.7	)		0.1
Balance at end of period	$	3.9		$	3.6

Provisions charged (credited) to operations were $0.6 million and $(0.6) million for the three months ended September 30, 2011 and 2010, respectively.

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INVENTORIES

Inventories consisted of the following:

	September 30, 2011			December 31, 2010			September 30, 2010
	($ in millions)
Supplies	$	32.8		$	30.8		$	29.3
Raw materials		69.8			56.5			59.8
Work in process		32.4			24.7			27.8
Finished goods		104.9			104.4			103.3
		239.9			216.4			220.2
LIFO reserve		(73.6	)		(60.8	)		(62.9	)
Inventories, net	$	166.3		$	155.6		$	157.3

In conjunction with the acquisition of SunBelt, we obtained inventories with a fair value of $4.0 million, as of February 28, 2011.  Inventories are valued at the lower of cost or market, with cost being determined principally by the dollar value last-in, first-out (LIFO) method of inventory accounting.  Cost for other inventories has been determined principally by the average cost method, primarily operating supplies, spare parts and maintenance parts.  Elements of costs in inventories included raw materials, direct labor and manufacturing overhead.  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, 2011, reflect certain estimates relating to inventory quantities and costs at December 31, 2011.  If the first-in, first-out (FIFO) method of inventory accounting had been used, inventories would have been approximately $73.6 million, $60.8 million and $62.9 million higher than reported at September 30, 2011, December 31, 2010 and September 30, 2010, respectively.

EARNINGS PER SHARE

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
Computation of Income per Share	($ and shares in millions, except per share data)
Net income	$	47.2	$	31.8	$	223.0	$	62.8
Basic shares		80.2		79.4		79.9		79.1
Basic net income per share	$	0.59	$	0.40	$	2.79	$	0.79
Diluted shares:
Basic shares		80.2		79.4		79.9		79.1
Stock-based compensation		0.6		0.8		0.9		0.7
Diluted shares		80.8		80.2		80.8		79.8
Diluted net income per share	$	0.58	$	0.40	$	2.76	$	0.79

The computation of dilutive shares from stock-based compensation does not include 1.7 million shares and 1.3 million shares for the three months ended September 30, 2011 and September 30, 2010, respectively, and 0.9 million shares and 1.3 million shares for the nine months ended September 30, 2011 and 2010, respectively, as their effect would have been anti-dilutive.

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ENVIRONMENTAL

We are party to various government and private environmental actions associated with past manufacturing facilities and former waste disposal sites.  Charges to income for investigatory and remedial efforts were material to operating results in 2011 and 2010.  The condensed balance sheets included reserves for future environmental expenditures to investigate and remediate known sites amounting to $164.6 million, $167.6 million and $170.5 million at September 30, 2011, December 31, 2010 and September 30, 2010, respectively, of which $136.6 million, $139.6 million and $146.5 million, respectively, were classified as other noncurrent liabilities.

Environmental provisions charged (credited) to income, which are included in cost of goods sold, were as follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
	($ in millions)
Charges to income	$	4.0		$	8.6		$	13.9		$	14.7
Recoveries from third parties of costs incurred and expensed in prior periods		(1.5	)		(0.2	)		(11.0	)		(5.6	)
Total environmental expense	$	2.5		$	8.4		$	2.9		$	9.1

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.

COMMITMENTS AND CONTINGENCIES

We, and our subsidiaries, are defendants in various legal actions (including proceedings based on alleged exposures to asbestos) incidental to our past and current business activities.  As of September 30, 2011, December 31, 2010 and September 30, 2010, our condensed balance sheets included liabilities for these legal actions of $16.1 million, $18.1 million and $18.9 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 legal actions will materially adversely affect our financial position or results of operations in the near term.

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 Accounting Standards Codification (ASC) 450 “Contingencies” (ASC 450) and therefore do not record gain contingencies and recognize income until it is earned and realizable.

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SHAREHOLDERS’ EQUITY

On July 21, 2011, our board of directors authorized a share repurchase program of up to 5 million shares of common stock that will terminate in three years for any of the remaining shares not yet repurchased.  Since the date of authorization, 0.1 million shares were purchased and retired under this program at a cost of $2.2 million.  As of September 30, 2011, we had purchased a total of 0.1 million shares under this program and 4.9 million shares remained authorized to be purchased.

We issued 0.5 million shares and 0.2 million shares representing stock options exercised for the nine months ended September 30, 2011 and 2010, respectively, with a total value of $9.3 million and $2.5 million, respectively.  In addition, we issued 0.6 million shares with a total value of $10.2 million for the nine months ended September 30, 2010, in connection with our Contributing Employee Ownership Plan (CEOP).  Effective September 23, 2010, our CEOP plan began to purchase shares in the open market in lieu of our issuing shares to satisfy the investment in our common stock resulting from employee contributions, our matching contributions, retirement contributions and re-invested dividends.  Effective February 1, 2011, we reinstated the match on all salaried and certain non-bargained hourly employees’ contributions, which had previously been suspended effective January 1, 2010.

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

	Foreign Currency Translation Adjustment			Unrealized Gains (Losses) on Derivative Contracts (net of taxes)			Pension and Postretirement Benefits (net of taxes)			Accumulated Other Comprehensive Loss
	($ in millions)
Balance at January 1, 2010	$	(0.5	)	$	11.6		$	(259.3	)	$	(248.2	)
Unrealized losses		(0.6	)		(0.8	)		—			(1.4	)
Reclassification adjustments into income		—			(4.1	)		7.4			3.3
Balance at September 30, 2010	$	(1.1	)	$	6.7		$	(251.9	)	$	(246.3	)
Balance at January 1, 2011	$	0.4		$	11.6		$	(273.8	)	$	(261.8	)
Unrealized gains (losses)		2.3			(13.0	)		—			(10.7	)
Reclassification adjustments into income		—			(7.2	)		9.1			1.9
Balance at September 30, 2011	$	2.7		$	(8.6	)	$	(264.7	)	$	(270.6	)

Pension and postretirement benefits (net of taxes) activity in other comprehensive loss included the amortization of prior service costs and actuarial losses.

Unrealized gains and losses on derivative contracts (net of taxes) activity in other comprehensive loss included a deferred tax provision (benefit) for the nine months ended September 30, 2011 and 2010 of $12.9 million and $(3.0) million, respectively.  Pension and postretirement benefits (net of taxes) activity in other comprehensive loss included a deferred tax provision for the nine months ended September 30, 2011 and 2010 of $5.9 million and $4.5 million, respectively.

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SEGMENT INFORMATION

We define segment results as income before interest expense, interest income, other operating income, other (expense) income and income taxes, and include the operating results of non-consolidated affiliates.

	Three Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
Sales:	($ in millions)
Chlor Alkali Products	$	386.1		$	275.3		$	1,065.8		$	763.9
Winchester		164.1			157.5			449.5			436.6
Total sales	$	550.2		$	432.8		$	1,515.3		$	1,200.5
Income before taxes:
Chlor Alkali Products	$	76.7		$	44.0		$	194.7		$	80.7
Winchester		13.1			18.8			37.4			59.4
Corporate/other:
Pension income		6.9			7.0			20.8			18.2
Environmental expense		(2.5	)		(8.4	)		(2.9	)		(9.1	)
Other corporate and unallocated costs		(15.7	)		(16.8	)		(53.6	)		(53.9	)
Restructuring charges		(4.1	)		—			(6.6	)		—
Other operating income		4.3			0.3			5.9			2.6
Interest expense		(7.9	)		(6.4	)		(22.5	)		(19.5	)
Interest income		0.2			0.3			0.7			0.7
Other (expense) income		(1.6	)		—			179.0			0.1
Income before taxes	$	69.4		$	38.8		$	352.9		$	79.2

STOCK-BASED COMPENSATION

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

	Three Months Ended September 30,					Nine Months Ended September 30,
	2011			2010		2011			2010
	($ in millions)
Stock-based compensation	$	1.9		$	2.2	$	6.7		$	7.9
Mark-to-market adjustments		(2.0	)		0.9		(1.2	)		1.1
Total (income) expense	$	(0.1	)	$	3.1	$	5.5		$	9.0

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	2011			2010
Dividend yield		4.32	%		4.32	%
Risk-free interest rate		3.05	%		3.00	%
Expected volatility		42	%		42	%
Expected life (years)		7.0			7.0
Grant fair value (per option)	$	5.48		$	4.61
Exercise price	$	18.78		$	15.68
Shares granted		575,000			803,750

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Dividend yield for 2011 and 2010 was based on a historical average.  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 of future exercise patterns.

PENSION PLANS AND RETIREMENT BENEFITS

Most of our employees participate in defined contribution pension plans.  We provide a contribution to an individual retirement contribution account maintained with the CEOP primarily equal to 5% of the employee’s eligible compensation if such employee is less than age 45, and 7.5% of the employee’s eligible compensation if such employee is age 45 or older.  The defined contribution pension plans expense was $3.5 million and $3.3 million for the three months ended September 30, 2011 and 2010, respectively, and $10.9 million and $10.5 million for the nine months ended September 30, 2011 and 2010, respectively.

A portion of our bargaining hourly employees continue to participate in our domestic defined benefit pension plans under a flat-benefit formula.  Our funding policy for the 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 statutory practices.  Our 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 health care (medical) and life insurance benefits for eligible active and retired domestic employees.  The health care 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,
	2011			2010			2011		2010
Components of Net Periodic Benefit (Income) Cost	($ in millions)
Service cost	$	1.6		$	1.5		$	0.2	$	0.3
Interest cost		23.4			24.4			0.7		0.8
Expected return on plans’ assets		(34.9	)		(34.6	)		—		—
Amortization of prior service cost		0.1			0.1			—		—
Recognized actuarial loss		3.8			3.3			1.0		0.5
Net periodic benefit (income) cost	$	(6.0	)	$	(5.3	)	$	1.9	$	1.6

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	Pension Benefits						Other Postretirement Benefits
	Nine Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
Components of Net Periodic Benefit (Income) Cost	($ in millions)
Service cost	$	4.8		$	4.5		$	0.9		$	1.0
Interest cost		70.6			73.9			2.6			2.8
Expected return on plans’ assets		(104.7	)		(103.9	)		—			—
Amortization of prior service cost		0.3			0.4			(0.1	)		(0.1	)
Recognized actuarial loss		11.3			9.7			2.4			1.9
Curtailment		1.1			—			—			—
Net periodic benefit (income) cost	$	(16.6	)	$	(15.4	)	$	5.8		$	5.6

We made cash contributions to our Canadian qualified defined benefit pension plan of $0.7 million and $7.3 million for the nine months ended September 30, 2011 and 2010, respectively.  In June 2011, we recorded a curtailment charge of $1.1 million related to the ratification of a new five and one half year Winchester, East Alton, IL union labor agreement.  This curtailment charge was included in restructuring charges for the nine months ended September 30, 2011.

In March 2010, we recorded a charge of $1.3 million associated with an agreement to withdraw our Henderson, NV chlor alkali hourly workforce from a multi-employer defined benefit pension plan.

INCOME TAXES

The following table accounts for the difference between the actual tax provision and the amounts obtained by applying the statutory U.S. federal income tax rate of 35% to income before taxes.

	Three Months Ended September 30,						Nine Months Ended September 30,
Effective Tax Rate Reconciliation (Percent)	2011			2010			2011			2010
Statutory federal tax rate		35.0	%		35.0	%		35.0	%		35.0	%
Foreign rate differential		(0.1	)		(0.6	)		—			(0.4	)
Domestic manufacturing/export tax incentive		(1.6	)		0.8			(0.8	)		—
Dividends paid to CEOP		(0.4	)		(1.0	)		(0.2	)		(1.4	)
State income taxes, net		2.4			2.0			1.2			1.7
Change in tax contingencies		(5.2	)		(16.1	)		(1.0	)		(11.4	)
Change in valuation allowance		—			0.3			—			(1.6	)
Return to provision		2.0			(2.6	)		0.6			(1.9	)
Remeasurement of deferred taxes		—			—			(1.4	)		—
Incremental tax effect of SunBelt remeasurement		—			—			3.5			—
Other, net		(0.1	)		0.2			(0.1	)		0.7
Effective tax rate		32.0	%		18.0	%		36.8	%		20.7	%

The effective tax rates for the three months ended September 30, 2011 and 2010 included the cumulative effect of changes to our annual estimated effective tax rate from prior quarters.

The effective tax rate for the three months ended September 30, 2011 included a $1.4 million expense associated with the finalization of our 2010 domestic income tax returns.  The effective tax rate for the nine months ended September 30, 2011 included a benefit of $4.9 million related to remeasurement of deferred taxes due to an increase in state tax effective rates, a $2.1 million expense associated with the finalization of our 2010 domestic and Canadian income tax returns and a deferred tax expense of $76.0 million related to the tax effect of the gain recorded on the remeasurement of our previously held 50% equity interest in SunBelt.

The effective tax rate for the three and nine months ended September 30, 2010 included an expense of $0.1 million and a benefit of $1.3 million, respectively, related to changes in the valuation allowance recorded against the foreign tax credit carryforward deferred tax asset generated by our Canadian operations.

17

 As of September 30, 2011, we had $38.7 million of gross unrecognized tax benefits, which would have a net $36.6 million impact on the effective tax rate, if recognized.  As of September 30, 2010, we had $42.4 million of gross unrecognized tax benefits, of which $40.1 million would have impacted the effective tax rate, if recognized.  The reduction for 2011 primarily relates to the recognition of tax benefits due to the expiration of statute of limitations in domestic jurisdictions.  The reduction included $2.1 million of tax positions associated with discontinued operations.  The amount of unrecognized tax benefits was as follows:

	September 30,
	2011			2010
	($ in millions)
Balance at beginning of year	$	41.5		$	50.8
Increases for prior year tax positions		0.2			0.2
Decreases for prior year tax positions		—			(0.3	)
Increases for current year tax positions		—			1.8
Decreases for current year tax positions		—			(0.1	)
Decreases due to settlement with taxing authorities		—			(2.2	)
Reductions due to statute of limitations		(3.0	)		(7.8	)
Balance at end of period	$	38.7		$	42.4

As of September 30, 2011, we believe it is reasonably possible that our total amount of unrecognized tax benefits will decrease by approximately $2.6 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 primarily in North America and file income tax returns in numerous jurisdictions.  Our tax returns are subject to examination by various federal, state and local tax authorities.  For our primary tax jurisdictions, the tax years that remain subject to examination are as follows:

	Tax Years
U.S. federal income tax	2007 – 2010
U.S. state income tax	2004 – 2010
Canadian federal income tax	2007 – 2010
Canadian provincial income tax	2006 – 2010

During third quarter 2010, the IRS completed an audit of our U.S. income tax return for 2006.  During second quarter 2010, the Canada Revenue Agency completed an audit of a portion of our Canadian tax returns for the 2005 to 2007 tax years.  No issues arose under either the U.S. audit or the Canadian audit that required an additional tax liability to be recognized.  We believe we have adequately provided for all tax positions; however, amounts asserted by taxing authorities could be greater than our accrued position.

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 statement of financial position and measure those instruments at fair value.  We use hedge accounting treatment for substantially all of our business transactions whose risks are covered using derivative instruments.  In accordance with ASC 815, we designate commodity forward contracts as cash flow hedges of forecasted purchases of commodities and 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.

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Energy costs, including electricity used in our Chlor Alkali Products segment, and certain raw materials and energy costs, namely copper, lead, zinc, electricity and natural gas used in our Winchester segment, are subject to price volatility.  Depending on market conditions, we may enter into futures contracts 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.  Those commodity contracts that extend beyond one year correspond with raw material purchases for long-term fixed-price sales contracts.

We enter into forward sales and purchase contracts to manage currency risk resulting from purchase and sale commitments denominated in foreign currencies (principally Canadian dollar and Euro).  All of the currency derivatives expire within one year and are for United States dollar equivalents.  Our foreign currency forward contracts do not meet the criteria to qualify for hedge accounting.  We had forward contracts to sell foreign currencies with a notional value of zero at both September 30, 2011 and December 31, 2010 and $0.2 million at September 30, 2010.  We had forward contracts to buy foreign currencies with a notional value of zero, $0.3 million and $1.3 million at September 30, 2011, December 30, 2010 and September 30, 2010, respectively.

In 2001 and 2002, we entered into interest rate swaps on $75 million of our underlying fixed-rate debt obligations, whereby we agreed to pay variable rates to a counterparty who, in turn, pays us fixed rates.  The counterparty to these agreements is Citibank, N.A. (Citibank), a major financial institution.  In January 2009, we entered into a $75 million fixed interest rate swap with equal and opposite terms as the $75 million variable interest rate swaps on the 9.125% senior notes due 2011 (2011 Notes).  We have agreed to pay a fixed rate to a counterparty who, in turn, pays us variable rates.  The counterparty to this agreement is Bank of America, N.A. (Bank of America), a major financial institution.  The result was a gain of $7.9 million on the $75 million variable interest rate swaps, which will be recognized through 2011.  As of September 30, 2011, $0.6 million of this gain was included in current installments of long-term debt.  In January 2009, we de-designated our $75 million interest rate swaps that had previously been designated as fair value hedges.  The $75 million variable interest rate swaps and the $75 million fixed interest rate swap do not meet the criteria for hedge accounting.  All changes in the fair value of these interest rate swaps are recorded currently in earnings.

Cash flow hedges

ASC 815 requires that all derivative instruments be recorded on the balance sheet at their fair value.  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 loss until the hedged item is recognized in earnings.  Gains and losses on the derivatives representing hedge ineffectiveness are recognized currently in earnings.

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

	September 30, 2011		December 31, 2010		September 30, 2010
	($ in millions)
Copper	$	54.3	$	25.1	$	26.0
Zinc		7.7		3.2		3.4
Lead		36.1		19.6		19.7
Natural gas		5.7		5.5		6.7

As of September 30, 2011, the counterparty to $67.5 million of these commodity forward contracts was Wells Fargo Bank, N.A. (Wells Fargo), a major financial institution.

19

 We use cash flow hedges for certain raw material and energy costs such as copper, zinc, lead, 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 the company's manufacturing process.  At September 30, 2011, we had open positions in futures contracts through 2016.  If all open futures contracts had been settled on September 30, 2011, we would have recognized a pretax loss of $14.3 million.

If commodity prices were to remain at September 30, 2011 levels, approximately $11.7 million of deferred losses 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

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.  As of September 30, 2011, December 31, 2010 and September 30, 2010, the total notional amounts of our interest rate swaps designated as fair value hedges were $218.0 million, $132.7 million and $132.7 million, respectively.  In May 2011, we entered into an $85.3 million interest rate swap on the SunBelt Notes.  In April 2010, Citibank terminated $18.9 million of interest rate swaps on our industrial development and environmental improvement tax-exempt bonds (industrial revenue bonds) due in 2016.  The result was a gain of $0.4 million, which would have been recognized through 2016.  In September 2010, the industrial revenue bonds were redeemed by us, and as a result, the remaining $0.3 million gain was recognized in interest expense during the third quarter of 2010.  In March 2010, we entered into $125.0 million of interest rate swaps on the 6.75% senior notes due 2016 (2016 Notes).

We use interest rate swaps as a means of managing interest expense and floating interest rate exposure to optimal levels.  These interest rate swaps are treated as fair value hedges.  The accounting for gains and losses associated with changes in fair value of the derivative and the effect on the condensed financial statements will depend on the hedge designation and whether the hedge is effective in offsetting changes in fair value of cash flows of the asset or liability being hedged.  We have entered into $218.0 million of such swaps, whereby we agreed to pay variable rates to a counterparty who, in turn, pays us fixed rates.  The counterparties to these agreements are Citibank ($132.7 million) and Wells Fargo ($85.3 million).  In all cases, the underlying index for the variable rates is six-month London InterBank Offered Rate (LIBOR).  Accordingly, payments are settled every six months and the terms of the swaps are the same as the underlying debt instruments.

Financial statement impacts

We present our derivative assets and liabilities in our condensed balance sheets on a net basis.  We net derivative assets and liabilities 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.

20

 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:

	Asset Derivatives								Liability Derivatives
		Fair Value								Fair Value
Derivatives Designated as Hedging Instruments	Balance Sheet Location	September 30, 2011		December 31, 2010		September 30, 2010			Balance Sheet Location	September 30, 2011			December 31, 2010			September 30, 2010
		($ in millions)								($ in millions)
Interest rate contracts	Other current assets	$	—	$	—	$	—		Current installments of long-term debt	$	0.6		$	2.8		$	—
Interest rate contracts	Other assets		14.3		5.3		10.8		Long-term debt		14.0			5.3			14.3
Interest rate contracts	Other assets		—		—		—		Other liabilities		0.2			—			—
Commodity contracts – gains	Other current assets		—		16.9		10.6		Accrued liabilities		(2.3	)		—			—
Commodity contracts – losses	Other current assets		—		—		(0.2	)	Accrued liabilities		16.6			—			—
		$	14.3	$	22.2	$	21.2			$	29.1		$	8.1		$	14.3
Derivatives Not Designated as Hedging Instruments
Interest rate contracts	Other current assets	$	0.8	$	3.8	$	—		Accrued liabilities	$	0.3		$	1.2		$	—
Interest rate contracts	Other assets		—		—		4.7		Other liabilities		—			—			1.3
Commodity contracts - gains	Other current assets		—		—		—		Accrued liabilities		—			(0.1	)		—
Commodity contracts – losses	Other current assets		—		—		—		Accrued liabilities		0.4			0.3			0.8
Foreign currency contracts	Other current assets		—		—		—		Accrued liabilities		—			—			0.1
		$	0.8	$	3.8	$	4.7			$	0.7		$	1.4		$	2.2
Total derivatives(1)		$	15.1	$	26.0	$	25.9			$	29.8		$	9.5		$	16.5

(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 income:

		Amount of Gain (Loss)						Amount of Gain (Loss)
		Three Months Ended September 30,						Nine Months Ended September 30,
	Location of Gain (Loss)	2011			2010			2011			2010
Derivatives – Cash Flow Hedges		($ in millions)
Recognized in other comprehensive loss (effective portion)	———	$	(21.7	)	$	12.9		$	(21.3	)	$	(1.2	)
Reclassified from accumulated other comprehensive loss into income (effective portion)	Cost of goods sold	$	1.2		$	(1.1	)	$	11.8		$	6.6
Derivatives – Fair Value Hedges
Interest rate contracts	Interest expense	$	1.8		$	1.9		$	5.8		$	4.7
Derivatives Not Designated as Hedging Instruments
Interest rate contracts	Interest expense	$	(0.1	)	$	0.1		$	—		$	0.3
Commodity contracts	Cost of goods sold		(0.4	)		(0.9	)		(0.8	)		(1.2	)
Foreign currency contracts	Selling and administration		—			0.1			—			(0.1	)
		$	(0.5	)	$	(0.7	)	$	(0.8	)	$	(1.0	)

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, exceed 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, 2011, the amount recognized in accrued liabilities for cash collateral provided by us to counterparties was $7.0 million.  As of December 31, 2010 and September 30, 2010, the amount recognized in other current assets for cash collateral provided by counterparties to us was $3.2 million and $0.7 million, respectively.  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

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) and directly related to the amount of subjectivity associated with the inputs to fair valuation of these assets and liabilities, 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.

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 financial assets and liabilities measured at fair value in the condensed balance sheets:

	Fair Value Measurements
Balance at September 30, 2011	Level 1			Level 2			Level 3			Total
Assets	($ in millions)
Interest rate swaps		$	—		$	15.1		$	—	$	15.1
Liabilities
Interest rate swaps		$	—		$	15.1		$	—	$	15.1
Commodity forward contracts			4.8			9.9			—		14.7
Earn out			—			—			44.9		44.9
Balance at December 31, 2010
Assets
Interest rate swaps		$	—		$	9.1		$	—	$	9.1
Commodity forward contracts			7.0			9.9			—		16.9
Liabilities
Interest rate swaps		$	—		$	9.3		$	—	$	9.3
Commodity forward contracts			—			0.2			—		0.2
Balance at September 30, 2010
Assets
Interest rate swaps		$	—		$	15.5		$	—	$	15.5
Commodity forward contracts			4.2			6.2			—		10.4
Liabilities
Interest rate swaps		$	—		$	15.6		$	—	$	15.6
Commodity forward contracts			—			0.8			—		0.8
Foreign currency contracts			0.1			—			—		0.1

For the nine months ended September 30, 2011, there were no transfers into or out of Level 1 and Level 2.

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 The following table summarizes the activity for our financial instruments measured at fair value using Level 3 inputs:

	September 30,
	2011			2010
	($ in millions)
Balance at beginning of year	$	—		$	—
Purchases, sales and settlements		(42.3	)		—
Unrealized loss included in other (expense) income		(2.6	)		—
Balance at end of period	$	(44.9	)	$	—

Interest Rate Swaps

The fair value of the interest rate swaps was included in other current assets, other assets, current installments of long-term debt, accrued liabilities, long-term debt and other liabilities as of September 30, 2011, December 31, 2010 and September 30, 2010.  These financial instruments were valued using the “income approach” valuation technique.  This method used valuation techniques to convert future amounts to a single present amount.  The measurement was based on the value indicated by current market expectations about those future amounts.  We use interest rate swaps as a means of managing interest expense and floating interest rate exposure to optimal levels.

Commodity Forward Contracts

The fair value of the commodity forward contracts was classified in other current assets and accrued liabilities as of September 30, 2011, December 31, 2010 and September 30, 2010, with unrealized gains and losses included in accumulated other comprehensive loss, net of applicable taxes.  These 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 forward contracts for certain raw materials and energy costs such as copper, zinc, lead, electricity and natural gas to provide a measure of stability in managing our exposure to price fluctuations.

Foreign Currency Contracts

The fair value of the foreign currency contracts was classified in accrued liabilities as of September 30, 2010, with gains and losses included in selling and administration expense, as these financial instruments do not meet the criteria to qualify for hedge accounting.  We did not have any foreign currency contracts as of September 30, 2011 and December 31, 2010.  These 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 foreign currencies.  We enter into forward sales and purchase contracts to manage currency risk resulting from purchase and sale commitments denominated in foreign currencies (principally Canadian dollar and Euro).

Financial Instruments

The carrying values of cash and cash equivalents, restricted cash, accounts receivable and accounts payable approximated fair values due to the short-term maturities of these instruments.  The fair value of our long-term debt was determined based on current market rates for debt of similar risk and maturities.  As of September 30, 2011, December 31, 2010 and September 30, 2010, the estimated fair value of debt was $610.9 million, $530.3 million and $420.3 million, respectively, which compares to debt recorded on the condensed balance sheets of $589.6 million, $496.0 million and $386.9 million, respectively.

Earn Out

The fair value of the earn out associated with the SunBelt acquisition was estimated using a probability-weighted discounted cash flow model.  This fair value measurement is based on significant inputs not observed in the market.  Key assumptions in determining the fair value of the earn out include the discount rate and cash flow projections for the years ended December 31, 2011, 2012 and 2013.

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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 measured at fair value on a nonrecurring basis as of September 30, 2011 and 2010.  At February 28, 2011, $180.6 million of assets were measured at fair value on a nonrecurring basis.  We recognized a gain of $181.4 million for the nine months ended September 30, 2011 on our previously held investment in SunBelt, which had been accounted for under the equity method of accounting prior to the acquisition.  We remeasured our equity interest in SunBelt based on our purchase of PolyOne’s 50% interest in SunBelt.  We used Level 1 inputs for the cash payments and Level 3 inputs for the estimated earn out.

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

Business Background

Our manufacturing operations are concentrated in two business segments:  Chlor Alkali Products and Winchester.  Both are capital intensive manufacturing businesses with operating rates closely tied to the general economy.  Each segment has a commodity element to it, and therefore, our ability to influence pricing is quite limited on the portion of the segment’s business that is strictly commodity.  Our Chlor Alkali Products segment is a commodity business where all supplier products are similar and price is the major supplier selection criterion.  We have little or no ability to influence prices in this large, global commodity market.  Cyclical price swings, driven by changes in supply/demand, can be abrupt and significant and, given the capacity in our Chlor Alkali Products business, can lead to significant changes in our overall profitability.  Winchester also has a commodity element to its business, but a majority of Winchester ammunition is sold as a branded consumer product where there are opportunities to differentiate certain offerings through innovative new product development and enhanced product performance.  While competitive pricing versus other branded ammunition products is important, it is not the only factor in product selection.

Executive Summary

SunBelt Acquisition

On February 28, 2011, we acquired PolyOne’s 50% interest in SunBelt for $132.3 million in cash plus the assumption of a PolyOne guarantee related to the SunBelt Notes.  With this acquisition, Olin now owns 100% of SunBelt.  The SunBelt chlor alkali plant, which is located within our McIntosh, AL facility, has approximately 350,000 tons of membrane technology capacity.  We also agreed to a three year earn out, which has no guaranteed minimum or maximum, based on the performance of SunBelt.  In conjunction with the acquisition, we consolidated the SunBelt Notes with a remaining principal balance of $85.3 million.

Since February 28, 2011, our consolidated results included $125.0 million of SunBelt sales and $23.2 million of additional SunBelt pretax income ($29.4 million included in Chlor Alkali Products segment income; less $0.8 million of acquisition costs, $2.8 million of interest expense and $2.6 million of expense for our earn out liability) on the 50% interest we acquired.  Finally, the first quarter 2011 results included a one-time pretax, non-cash gain of $181.4 million associated with the remeasurement of our previously held 50% equity interest in SunBelt.  In conjunction with this remeasurement, a discrete deferred tax expense of $76.0 million was recorded.

Other Highlights

Chlor Alkali Products’ segment income was $76.7 million and $194.7 million for the three and nine months ended September 30, 2011, respectively.  Chlor Alkali Products’ segment income was higher than the comparable periods in the prior year, as a result of $14.4 million and $29.4 million, respectively, of additional income from the acquisition of the remaining 50% interest in SunBelt and improved ECU pricing.  Operating rates in Chlor Alkali Products for the third quarter of 2011 were 85%, which were lower than the third quarter of 2010 level of 91% but consistent with the second quarter of 2011 level of 85%.  The combination of planned multi-month outages by two chlorine customers and a weakening of chlorine demand negatively impacted shipment volumes in the second half of the third quarter of 2011.

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 Third quarter of 2011 ECU netbacks, excluding SunBelt, were approximately $590, which was an increase from the approximately $550 experienced in the second quarter of 2011 and the approximately $465 experienced in the third quarter of 2010.  The third quarter 2011 SunBelt ECU netback was approximately $610.  The sequential improvement in ECU netbacks reflected both higher chlorine and caustic soda prices, which benefited from the $150 per ton of caustic soda price increases announced in the first half of 2011 along with a March 2011 announced $60 per ton chlorine price increase.  In the third quarter of 2011, an additional caustic soda price increase was announced for $65 per ton, replacing a late second quarter announced caustic soda price increase of $25 per ton.  While the success of this $65 per ton caustic soda price increase is not yet known, the benefit of this price increase, if realized, is expected in our system starting in the fourth quarter of 2011 with the majority affecting the first quarter of 2012.

Winchester segment income was $13.1 million and $37.4 million for the three and nine months ended September 30, 2011, respectively.  The decrease in third quarter and year to date segment income compared to the comparable periods last year reflected the impact of higher commodity metals and other material costs, higher manufacturing costs, incremental costs associated with the ongoing relocation of the centerfire operations to Oxford, MS and a less favorable product mix, partially offset by higher selling prices.

During the third quarter of 2011, a pretax restructuring charge of $4.1 million was recorded associated with exiting the use of mercury cell technology in the chlor alkali manufacturing process by the end of 2012 and the ongoing relocation of our Winchester centerfire ammunition manufacturing operations from East Alton, IL to Oxford, MS.  Over the next three years additional restructuring charges are anticipated associated with these actions.

Other operating income for the three and nine months ended September 30, 2011 included a gain of $3.7 million on the sale of a former manufacturing site.

Income before taxes for the three and nine months ended September 30, 2011 included $1.5 million and $11.0 million, respectively, of recoveries from third parties for environmental costs incurred and expensed in prior periods.  The three and nine months ended September 30, 2010 included $0.2 million and $5.6 million, respectively, of recoveries from third parties for environmental costs incurred and expensed in prior periods.

Capital spending of $128.4 million for the nine months ended September 30, 2011 included $39.4 million for the relocation of our Winchester centerfire ammunition manufacturing operations and $34.1 million for the conversion of our Charleston, TN facility from mercury cell technology to membrane technology.  The capital spending for the Winchester relocation of $39.4 million was partially financed by $13.1 million of grants received by the State of Mississippi and local governments.

Consolidated Results of Operations

	Three Months Ended September 30,					Nine Months Ended September 30,
	2011			2010		2011		2010
	($ in millions, except per share data)
Sales	$	550.2		$	432.8	$	1,515.3	$	1,200.5
Cost of goods sold		432.7			366.5		1,205.6		1,026.7
Gross margin		117.5			66.3		309.7		173.8
Selling and administration		39.8			33.3		121.8		101.3
Restructuring charges		4.1			—		6.6		—
Other operating income		4.3			0.3		5.9		2.6
Operating income		77.9			33.3		187.2		75.1
Earnings of non-consolidated affiliates		0.8			11.6		8.5		22.8
Interest expense		7.9			6.4		22.5		19.5
Interest income		0.2			0.3		0.7		0.7
Other (expense) income		(1.6	)		—		179.0		0.1
Income before taxes		69.4			38.8		352.9		79.2
Income tax provision		22.2			7.0		129.9		16.4
Net income	$	47.2		$	31.8	$	223.0	$	62.8
Net income per common share:
Basic	$	0.59		$	0.40	$	2.79	$	0.79
Diluted	$	0.58		$	0.40	$	2.76	$	0.79

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Three Months Ended September 30, 2011 Compared to Three Months Ended September 30, 2010

Sales for the three months ended September 30, 2011 were $550.2 million compared to $432.8 million in the same period last year, an increase of $117.4 million, or 27%.  Chlor Alkali Products’ sales increased $110.8 million, or 40%, primarily due to the inclusion of SunBelt sales of $58.9 million and higher ECU prices.  Our ECU netbacks, excluding SunBelt, increased 27% compared to the same period in the prior year.  Winchester sales increased by $6.6 million, or 4%, from the three months ended September 30, 2010 primarily due to higher shipments to domestic commercial, international and military customers.

Gross margin increased $51.2 million, or 77%, compared to the three months ended September 30, 2010, primarily as a result of increased Chlor Alkali Products’ gross margin due to the contribution from SunBelt and increased ECU netbacks, partially offset by reduced Winchester gross margin resulting from higher commodity and other material costs.  Gross margin as a percentage of sales increased to 21% in 2011 from 15% in 2010.

Selling and administration expenses for the three months ended September 30, 2011 increased $6.5 million, or 20%, from the three months ended September 30, 2010 primarily due to increased expenses associated with the inclusion of SunBelt’s selling and administration expenses of $2.8 million, higher salary and benefit costs of $2.6 million, higher recruiting and relocation charges of $1.4 million, higher bad debt costs of $1.3 million and an unfavorable foreign currency impact of $0.4 million.  These increases were partially offset by lower management incentive compensation of $2.3 million, which included mark-to-market adjustments that reduced stock-based compensation, and a lower level of legal and legal-related settlement expenses of $1.0 million.  Selling and administration expenses as a percentage of sales were 7% in 2011 and 8% in 2010.

Restructuring charges for the three months ended September 30, 2011 of $4.1 million included employee severance and related benefit costs of $2.7 million, employee relocation costs of $1.0 million and facility exit costs of $0.4 million.  These restructuring charges are associated with exiting the use of mercury cell technology in the chlor alkali manufacturing process by the end of 2012 and the ongoing relocation of our Winchester centerfire ammunition manufacturing operations from East Alton, IL to Oxford, MS.

Other operating income for the three months ended September 30, 2011 included a gain of $3.7 million on the sale of a former manufacturing site.

The earnings of non-consolidated affiliates were $0.8 million for the three months ended September 30, 2011, a decrease of $10.8 million from the three months ended September 30, 2010, primarily due to the acquisition of the remaining 50% interest in SunBelt that was completed on February 28, 2011.  Since the date of acquisition, SunBelt’s results are no longer included in earnings of non-consolidated affiliates but are consolidated in our financial statements.

Interest expense increased by $1.5 million for the three months ended September 30, 2011, primarily due to a higher level of outstanding debt, which includes the SunBelt Notes, partially offset by lower interest rates.

Other (expense) income for the three months ended September 30, 2011 included $1.7 million of expense for our earn out liability from the SunBelt acquisition.

The effective tax rate for the three months ended September 30, 2011 included a $3.6 million reduction in expense associated with the expiration of statutes of limitation in domestic jurisdictions and a $1.4 million expense associated with the finalization of our 2010 domestic income tax returns.  After giving consideration to these two items of $2.2 million, the effective rate for the three months ended September 30, 2011 of 35.2% was higher than the 35% U.S. federal statutory rate primarily due to state income taxes, which were partially offset by favorable permanent tax deduction items and the utilization of certain state tax credits.  The effective tax rate for the three months ended September 30, 2010 included a $6.3 million reduction in expense associated with the expiration of statutes of limitation in domestic jurisdictions, and a $1.0 million reduction in expense associated with the finalization of the 2009 income tax return.  After giving consideration to these two items of $7.3 million, the effective rate for the three months ended September 30, 2010 of 36.9% was higher than the 35% U.S. federal statutory rate primarily due to state income taxes, which were partially offset by favorable permanent tax deduction items and the utilization of certain state tax credits.

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Nine Months Ended September 30, 2011 Compared to Nine Months Ended September 30, 2010

Sales for the nine months ended September 30, 2011 were $1,515.3 million compared to $1,200.5 million last year, an increase of $314.8 million, or 26%.  Chlor Alkali Products’ sales increased $301.9 million, or 40%, primarily due to the inclusion of SunBelt sales of $125.0 million, higher ECU prices and increased volumes.  Our ECU netbacks, excluding SunBelt, increased 21% compared to the same period in the prior year.  Winchester sales increased by $12.9 million, or 3%, from the nine months ended September 30, 2010 primarily due to increased shipments to international, military and domestic commercial customers.

Gross margin increased $135.9 million, or 78%, compared to the nine months ended September 30, 2010, primarily as a result of increased Chlor Alkali Products’ gross margin due to the contribution from SunBelt, increased ECU netbacks, higher volumes and the impact of increased recoveries from third parties for environmental costs incurred and expensed in prior periods, partially offset by reduced Winchester gross margin resulting from higher commodity and other material costs.  Gross margin as a percentage of sales increased to 20% in 2011 from 14% in 2010.

Selling and administration expenses for the nine months ended September 30, 2011 increased $20.5 million, or 20%, from the nine months ended September 30, 2010 primarily due to increased expenses associated with the inclusion of SunBelt’s selling and administration expenses of $6.1 million, higher recruiting and relocation charges of $4.5 million, increased salary and benefit costs of $3.2 million, SunBelt acquisition costs of $0.8 million, a higher level of legal and legal-related settlement expenses of $0.6 million, increased management incentive compensation of $0.6 million, which included mark-to-market adjustments that reduced stock-based compensation, higher consulting charges of $0.6 million, higher bad debt costs of $0.6 million and an unfavorable foreign currency impact of $0.4 million.  Selling and administration expenses as a percentage of sales was 8% in 2011 and 2010.

Restructuring charges for the nine months ended September 30, 2011 of $6.6 million included employee severance and related benefit costs of $3.7 million, employee relocation costs of $1.3 million, a non-cash pension curtailment charge of $1.1 million and facility exit costs of $0.5 million.  These restructuring charges are associated with exiting the use of mercury cell technology in the chlor alkali manufacturing process by the end of 2012 and the ongoing relocation of our Winchester centerfire ammunition manufacturing operations from East Alton, IL to Oxford, MS.

Other operating income for the nine months ended September 30, 2011 increased by $3.3 million from the nine months ended September 30, 2010.  Other operating income for the nine months ended September 30, 2011 included a gain of $3.7 million on the sale of a former manufacturing site and $1.1 million of gains on the disposition of property, plant and equipment primarily associated with the Charleston, TN conversion project.  Other operating income for the nine months ended September 30, 2010 included $1.5 million of gains on the disposition of property, plant and equipment primarily associated with the St. Gabriel, LA conversion and expansion project.

The earnings of non-consolidated affiliates were $8.5 million for the nine months ended September 30, 2011, a decrease of $14.3 million from the nine months ended September 30, 2010, primarily due to the acquisition of the remaining 50% interest in SunBelt that was completed on February 28, 2011.  Since the date of acquisition, SunBelt’s results are no longer included in earnings of non-consolidated affiliates but are consolidated in our financial statements.

Interest expense increased by $3.0 million for the nine months ended September 30, 2011, primarily due to a higher level of outstanding debt, which includes the SunBelt Notes, partially offset by lower interest rates.

Other (expense) income for the nine months ended September 30, 2011 included a gain of $181.4 million as a result of remeasuring our previously held 50% equity interest in SunBelt, partially offset by $2.6 million of expense for our earn out liability from the SunBelt acquisition.

28

 The effective tax rate for the nine months ended September 30, 2011 included a $3.5 million reduction in expense associated with the expiration of statutes of limitation in domestic jurisdictions, a benefit of $4.9 million related to remeasurement of deferred taxes due to an increase in state tax effective rates, a $2.1 million expense associated with the finalization of our 2010 domestic and Canadian income tax returns and a deferred tax expense of $76.0 million related to the tax effect of the gain recorded on the remeasurement of our previously held 50% equity interest in SunBelt.  After giving consideration to these four items of $69.7 million and the SunBelt pretax gain of $181.4 million, the effective tax rate of 35.1% for the nine months ended September 30, 2011 was slightly higher than the 35% U.S. federal statutory rate, primarily due to state income taxes, which were partially offset by favorable permanent tax deduction items and the utilization of certain state tax credits.  The effective tax rate for the nine months ended September 30, 2010 included a $9.0 million reduction in expense associated with the expiration of statutes of limitation in domestic and foreign jurisdictions, a $1.3 million reduction in expense related to the release of a portion of a valuation allowance recorded against the foreign tax credit carryforward deferred tax asset generated by our Canadian operations and a $1.4 million reduction in expense primarily associated with the finalization of the 2009 federal income tax return.  After giving consideration to these three items of $11.7 million, the effective rate for the nine months ended September 30, 2010 of 35.5% was higher than the 35% U.S. federal statutory rate primarily due to state income taxes, which were offset in part by the utilization of certain state tax credits.

Segment Results

We define segment results as income before interest expense, interest income, other operating income, other (expense) income and income taxes, and include the operating results of non-consolidated affiliates.

	Three Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
Sales:	($ in millions)
Chlor Alkali Products	$	386.1		$	275.3		$	1,065.8		$	763.9
Winchester		164.1			157.5			449.5			436.6
Total sales	$	550.2		$	432.8		$	1,515.3		$	1,200.5
Income before taxes:
Chlor Alkali Products(1)	$	76.7		$	44.0		$	194.7		$	80.7
Winchester		13.1			18.8			37.4			59.4
Corporate/other:
Pension income(2)		6.9			7.0			20.8			18.2
Environmental expense(3)		(2.5	)		(8.4	)		(2.9	)		(9.1	)
Other corporate and unallocated costs		(15.7	)		(16.8	)		(53.6	)		(53.9	)
Restructuring charges(4)		(4.1	)		—			(6.6	)		—
Other operating income(5)		4.3			0.3			5.9			2.6
Interest expense		(7.9	)		(6.4	)		(22.5	)		(19.5	)
Interest income		0.2			0.3			0.7			0.7
Other (expense) income(6)		(1.6	)		—			179.0			0.1
Income before taxes	$	69.4		$	38.8		$	352.9		$	79.2

(1) Earnings of non-consolidated affiliates were included in the Chlor Alkali Products segment results consistent with management’s monitoring of the operating segments.  The earnings of non-consolidated affiliates were $0.8 million and $11.6 million for the three months ended September 30, 2011 and 2010, respectively, and $8.5 million and $22.8 million for the nine months ended September 30, 2011 and 2010, respectively.  On February 28, 2011, we acquired the remaining 50% interest in SunBelt.  Since the date of acquisition, SunBelt’s results are no longer included in earnings of non-consolidated affiliates but are consolidated in our financial statements.

(2) The service cost and the amortization of prior service cost components of pension expense related to the employees of the operating segments are allocated to the operating segments based on their respective estimated census data.  All other components of pension costs are included in corporate/other and include items such as the expected return on plan assets, interest cost and recognized actuarial gains and losses.  Pension income for the nine months ended September 30, 2010 included a charge of $1.3 million associated with an agreement to withdraw our Henderson, NV chlor alkali hourly workforce from a multi-employer defined benefit pension plan.

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(3) Environmental expense for the three months ended September 30, 2011 and 2010 included $1.5 million and $0.2 million, respectively, of recoveries from third parties for costs incurred and expensed in prior periods.  Environmental expense for the nine months ended September 30, 2011 and 2010 included $11.0 million and $5.6 million, respectively, of recoveries from third parties for costs incurred and expensed in prior periods.  Environmental expense is included in cost of goods sold in the condensed statements of income.

(4) Restructuring charges for the three and nine months ended September 30, 2011 were associated with exiting the use of mercury cell technology in the chlor alkali manufacturing process by the end of 2012 and the ongoing relocation of our Winchester centerfire ammunition manufacturing operations from East Alton, IL to Oxford, MS.

(5) Other operating income for the three and nine months ended September 30, 2011 included a gain of $3.7 million on the sale of a former manufacturing site.

(6) Other (expense) income for the nine months ended September 30, 2011 included a pretax gain of $181.4 million as a result of remeasuring our previously held 50% equity interest in SunBelt, partially offset by $2.6 million of expense for our earn out liability from the SunBelt acquisition.  The income tax provision for the nine months ended September 30, 2011 included a $76.0 million discrete deferred tax expense as a result of the remeasurement of the SunBelt investment.

Chlor Alkali Products

Three Months Ended September 30, 2011 Compared to Three Months Ended September 30, 2010

Chlor Alkali Products’ sales for the three months ended September 30, 2011 were $386.1 million compared to $275.3 million for the three months ended September 30, 2010, an increase of $110.8 million, or 40%.  The acquisition of SunBelt contributed sales of $58.9 million for the three months ended September 30, 2011.  Chlor Alkali Products’ sales, excluding SunBelt, increased $51.9 million, or 19%.  The sales increase was primarily due to higher ECU pricing, which increased 27% from the three months ended September 30, 2010, partially offset by lower chlorine and caustic soda volumes of 1%.  Bleach volumes increased 7% for the three months ended September 30, 2011 compared to the same period last year and hydrochloric acid volumes increased 6% compared to the three months ended September 30, 2010.  Our ECU netback, excluding SunBelt, was approximately $590 for the three months ended September 30, 2011 compared to approximately $465 for the three months ended September 30, 2010.  The SunBelt ECU netback for the three months ended September 30, 2011 was approximately $610.  Freight costs included in the ECU netback increased 15% for the three months ended September 30, 2011, compared to the same period last year, primarily due to higher railroad freight rates.  Our operating rate for the three months ended September 30, 2011 was 85%, compared to the operating rate of 91% for the three months ended September 30, 2010.  The lower operating rate for 2011 resulted from planned multi-month outages by two chlorine customers and weaker chlorine demand.

Chlor Alkali Products posted segment income of $76.7 million for the three months ended September 30, 2011, compared to $44.0 million for the three months ended September 30, 2010, an increase of $32.7 million, or 74%.  Chlor Alkali Products segment income was higher primarily due to higher ECU netbacks ($41.0 million) and higher SunBelt earnings ($17.1 million).  The higher SunBelt earnings were primarily related to higher ECU netbacks and $14.4 million of additional income on the remaining 50% interest we acquired.  These increases were partially offset by increased operating costs ($25.4 million), primarily raw materials and electricity.

Nine Months Ended September 30, 2011 Compared to Nine Months Ended September 30, 2010

Chlor Alkali Products’ sales for the nine months ended September 30, 2011 were $1,065.8 million compared to $763.9 million for the nine months ended September 30, 2010, an increase of $301.9 million, or 40%.  The acquisition of SunBelt contributed sales of $125.0 million for the nine months ended September 30, 2011.  Chlor Alkali Products’ sales, excluding SunBelt, increased $176.9 million, or 23%.  The sales increase was primarily due to higher ECU pricing, which increased 21% from the nine months ended September 30, 2010, and higher chlorine and caustic soda volumes of 5%.  Bleach volumes increased 19% for the nine months ended September 30, 2011 compared to the same period last year, and hydrochloric acid volumes and potassium hydroxide volumes increased 11% and 4%, respectively, compared to the nine months ended September 30, 2010.  Our ECU netback, excluding SunBelt, was approximately $555 for the nine months ended September 30, 2011 compared to approximately $460 for the nine months ended September 30, 2010.  The SunBelt ECU netback for the nine months ended September 30, 2011 was approximately $595.  Freight costs included in the ECU netback increased 21% for the nine months ended September 30, 2011, compared to the same period last year, primarily due to higher railroad freight rates.  Our operating rates for the nine months ended September 30, 2011 and 2010 were 83%.

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 Chlor Alkali Products posted segment income of $194.7 million for the nine months ended September 30, 2011, compared to $80.7 million for the nine months ended September 30, 2010, an increase of $114.0 million, or 141%.  Chlor Alkali Products segment income was higher primarily due to higher ECU netbacks ($88.2 million), higher SunBelt earnings ($42.8 million) and increased volumes ($22.3 million).  The higher SunBelt earnings primarily related to higher ECU netbacks and $29.4 million of additional income on the remaining 50% interest we acquired.  These increases were partially offset by increased operating costs ($39.3 million), primarily raw materials and electricity.

Winchester

Three Months Ended September 30, 2011 Compared to Three Months Ended September 30, 2010

Winchester sales were $164.1 million for the three months ended September 30, 2011 compared to $157.5 million for the three months ended September 30, 2010, an increase of $6.6 million, or 4%.  Sales of ammunition to domestic commercial customers increased $4.2 million, shipments to international customers increased $2.0 million and shipments to military customers increased $1.0 million.  These increases were partially offset by lower shipments to law enforcement agencies of $1.0 million.

Winchester reported segment income of $13.1 million for the three months ended September 30, 2011 compared to $18.8 million for the three months ended September 30, 2010, a decrease of $5.7 million, or 30%.  The decrease was primarily due to the impact of increased commodity and other material costs, higher operating costs ($10.6 million) and a less favorable product mix ($3.4 million), partially offset by higher selling prices ($8.3 million).

Nine Months Ended September 30, 2011 Compared to Nine Months Ended September 30, 2010

Winchester sales were $449.5 million for the nine months ended September 30, 2011 compared to $436.6 million for the nine months ended September 30, 2010, an increase of $12.9 million, or 3%.  Shipments to international and military customers increased $6.5 million and $5.5 million, respectively, and sales of ammunition to domestic commercial customers increased $3.4 million.  These increases were partially offset by lower shipments to law enforcement agencies of $2.5 million.

Winchester reported segment income of $37.4 million for the nine months ended September 30, 2011 compared to $59.4 million for the nine months ended September 30, 2010, a decrease of $22.0 million, or 37%.  The decrease was primarily due to the impact of increased commodity and other material costs and higher operating costs ($32.6 million), partially offset by increased volumes and higher selling prices ($10.6 million).

Corporate/Other

Three Months Ended September 30, 2011 Compared to Three Months Ended September 30, 2010

For the three months ended September 30, 2011, pension income included in corporate/other was $6.9 million compared to $7.0 million for the three months ended September 30, 2010.  On a total company basis, defined benefit pension income for the three months ended September 30, 2011 was $6.0 million compared to $5.3 million for the three months ended September 30, 2010.

For the three months ended September 30, 2011, charges to income for environmental investigatory and remedial activities were $2.5 million compared to $8.4 million for the three months ended September 30, 2010, which included $1.5 million and $0.2 million, respectively, of recoveries from third parties for costs incurred and expensed in prior periods.  Without these recoveries, charges to income for environmental investigatory and remedial activities would have been $4.0 million for the three months ended September 30, 2011 compared with $8.6 million for the three months ended September 30, 2010.  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, 2011, other corporate and unallocated costs were $15.7 million compared to $16.8 million for the three months ended September 30, 2010, a decrease of $1.1 million, or 7%.  The decrease was primarily due to lower management incentive compensation of $2.8 million, which included mark-to-market adjustments that reduced stock-based compensation, and a lower level of legal and legal-related settlement expenses of $1.2 million.  These decreases were partially offset by increased salary and benefit costs of $1.1 million, an unfavorable foreign currency impact of $0.5 million and increased legacy site costs of $0.5 million.

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Nine Months Ended September 30, 2011 Compared to Nine Months Ended September 30, 2010

For the nine months ended September 30, 2011, pension income included in corporate/other was $20.8 million compared to $18.2 million for the nine months ended September 30, 2010.  Pension income for the nine months ended September 30, 2010 included a charge of $1.3 million associated with an agreement to withdraw our Henderson, NV chlor alkali hourly workforce from a multi-employer defined benefit pension plan.  On a total company basis, defined benefit pension income for the nine months ended September 30, 2011 was $16.6 million compared to $15.4 million for the nine months ended September 30, 2010.

For the nine months ended September 30, 2011, charges to income for environmental investigatory and remedial activities were $2.9 million compared to $9.1 million for the nine months ended September 30, 2010, which included $11.0 million and $5.6 million, respectively, of recoveries from third parties for costs incurred and expensed in prior periods.  Without these recoveries, charges to income for environmental investigatory and remedial activities would have been $13.9 million for the nine months ended September 30, 2011 compared with $14.7 million for the nine months ended September 30, 2010.  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, 2011, other corporate and unallocated costs were $53.6 million compared to $53.9 million for the nine months ended September 30, 2010, a decrease of $0.3 million, or 1%.  The decrease was primarily due to decreased insurance costs of $1.5 million and lower management incentive compensation of $1.2 million, which included mark-to-market adjustments that reduced stock-based compensation.  These decreases were partially offset by increased salary and benefit costs of $1.0 million and SunBelt acquisition costs of $0.8 million.

Outlook

Net income in the fourth quarter of 2011 is projected to be in the $0.15 to $0.20 per diluted share range compared with $0.02 per diluted share in the fourth quarter of 2010.  The fourth quarter of 2010 included a restructuring charge of $34.2 million.

In Chlor Alkali Products, the fourth quarter of 2011 segment income is expected to improve compared to fourth quarter of 2010 income of $36.5 million.  The improved segment income includes the earnings from the 100% SunBelt ownership and anticipates higher ECU netbacks, partially offset by lower chlorine and caustic soda volumes.  The fourth quarter of 2011 segment income is expected to decline compared to the third quarter of 2011 reflecting normal seasonal weakness.  The Chlor Alkali Products’ operating rate in the fourth quarter of 2011 is forecast to decline from the third quarter of 2011 level of 85% and the fourth quarter of 2010 level of 80% to the mid 70% range.  This reflects the normal seasonal slowdown in our bleach business and in many of our large chlorine consumers and a weakness in chlorine demand supporting chlorine derivatives exports.

Third quarter of 2011 ECU netbacks, excluding SunBelt, were approximately $590, which was an increase from the approximately $550 experienced in the second quarter of 2011 and the approximately $465 experienced in the third quarter of 2010.  The third quarter 2011 SunBelt ECU netback was approximately $610.  The sequential improvement in ECU netbacks reflected both higher chlorine and caustic soda prices, which benefited from the $150 per ton of caustic soda price increases announced in the first half of 2011 along with a March 2011 announced $60 per ton chlorine price increase.  In the third quarter of 2011, an additional caustic soda price increase was announced for $65 per ton, replacing a late second quarter announced caustic soda price increase of $25 per ton.  While the success of this $65 per ton caustic soda price increase is not yet known, the benefit of this price increase, if realized, is expected in our system starting in the fourth quarter of 2011 with the majority affecting the first quarter of 2012.  ECU netbacks in the fourth quarter are forecast to decline slightly from the third quarter levels as chlorine price declines and a less favorable customer mix more than offset increases in caustic soda prices.  Based on the lag we experience in the realization of price increases, we are anticipating that this sequential ECU netback decline will be reversed in the first quarter of 2012.

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Bleach volumes in the third quarter of 2011 increased approximately 7% compared to third quarter 2010 levels.  We have now experienced fifteen consecutive quarters, on a year-over-year basis, of volume growth in bleach shipments.  We are forecasting an additional 10% to 15% growth in bleach shipments in 2012 compared to 2011.  During 2010, approximately 9% of our effective chlor alkali capacity was consumed making bleach.  The continuation of these initiatives and the start-up of our first low salt, high strength bleach facility in McIntosh, AL, which is expected during the fourth quarter of 2011, will drive future growth.  During the third quarter of 2011, we began construction of two additional low salt, high strength bleach plants to be located at our Henderson, NV and Niagara Falls, NY chlor alkali facilities.  We expect these low salt, high strength bleach plants, which represent capital spending commitments of approximately $40 million, to be operational by the fourth quarter of 2012.  These new low salt, high strength facilities will allow us to produce bleach that is approximately twice the concentration of the bleach produced with the conventional technology, and this has the effect of both doubling our local capacity and reducing our freight costs.

Winchester fourth quarter 2011 segment income is expected to be near break-even, and decline from the fourth quarter 2010 levels of $3.6 million.  Lower commercial volumes and higher commodity metal costs are expected to more than offset higher selling prices compared to the prior year fourth quarter.  The higher than normal levels of commercial demand that began in the fourth quarter of 2008 continued through the second quarter of 2010.  However, beginning with the third quarter of 2010, Winchester began to experience a decline in commercial demand from the 2009 levels.

The purchased cost for copper in the third quarter of 2011 increased approximately 24% compared to the third quarter of 2010 and lead costs in the third quarter of 2011 increased approximately 16% compared to the third quarter of 2010.  The price escalations for copper and lead represent approximately $5 million of third quarter year-over-year cost increases for the Winchester business.  For the nine months ended September 30, 2011, purchased copper costs have increased approximately 27%, and purchased lead costs have increased approximately 14%, representing approximately $16 million in cost increases.  Winchester utilizes approximately three times as much lead as copper and three times as much copper as zinc.  Throughout 2011, the price of copper and lead has been a major challenge for the business.

On November 3, 2010, we announced that we had made the decision to relocate the Winchester centerfire ammunition operations from East Alton, IL to Oxford, MS.  This relocation, when completed, is forecast to reduce Winchester’s annual operating costs by approximately $30 million.  We expect the relocation to begin to generate meaningful cost savings in the second half of 2013.  We also expect this relocation project to reduce Winchester’s 2011 segment earnings associated with the overlap of support costs between the East Alton, IL and Oxford, MS facilities and other project costs.  The reduction to Winchester 2011 segment income for this relocation project is estimated to be $4 million to $5 million.

We anticipate that 2011 charges for environmental investigatory and remedial activities will be in the $20 million range compared to the 2010 level of $16.3 million.  We do not believe that there will be additional recoveries of environmental costs incurred and expensed in prior periods in the fourth quarter of 2011.

We expect defined benefit pension plan income in 2011 to be similar to the 2010 level.  Based on the December 31, 2010 funding status, we will not be required to make any cash contributions to our domestic defined benefit pension plan in 2011.  We do have a small Canadian defined benefit pension plan to which we made $9.8 million and $4.5 million of cash contributions in 2010 and 2009, respectively, and we anticipate cash contributions of less than $5 million in 2011.

During the fourth quarter of 2011, we are anticipating a pretax restructuring charge of approximately $2.5 million primarily associated with the ongoing relocation of our Winchester centerfire ammunition manufacturing operations from East Alton, IL to Oxford, MS.  We expect to incur restructuring charges through 2016 totaling approximately $18 million related to the ongoing relocation of our Winchester centerfire ammunition manufacturing operations from East Alton, IL to Oxford, MS.  We also expect to incur restructuring charges through 2014 totaling approximately $8 million related to exiting the use of mercury cell technology in the chlor alkali manufacturing process.

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We believe the 2011 effective tax rate will be in the 36% to 37% range.

For the total year 2011, we expect capital spending to be approximately $255 million.  Approximately 65% of this spending will be for the conversion of our Charleston, TN facility from mercury cell technology to membrane technology and the ongoing relocation of our Winchester centerfire ammunition manufacturing operations.  The capital spending for the Winchester relocation will be partially financed by approximately $31 million of grants provided by the State of Mississippi and local governments.  Also, we expect to continue capital spending for the low salt, high strength bleach facilities located at our McIntosh, AL site, which is expected to be completed in the fourth quarter of 2011, and our Henderson, NV and Niagara Falls, NY chlor alkali sites, which are expected to be completed by the fourth quarter of 2012.  We expect depreciation expense to be in the $100 million range for 2011.

Environmental Matters

Environmental provisions charged (credited) to income, which are included in costs of goods sold, were as follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
	($ in millions)
Charges to income	$	4.0		$	8.6		$	13.9		$	14.7
Recoveries from third parties of costs incurred and expensed in prior periods		(1.5	)		(0.2	)		(11.0	)		(5.6	)
Total environmental  expense	$	2.5		$	8.4		$	2.9		$	9.1

Our liabilities for future environmental expenditures were as follows:

	September 30,
	2011			2010
	($ in millions)
Balance at beginning of year	$	167.6		$	166.1
Charges to income		13.9			14.7
Remedial and investigatory spending		(16.3	)		(10.6	)
Currency translation adjustments		(0.6	)		0.3
Balance at end of period	$	164.6		$	170.5

Environmental investigatory and remediation activities spending was associated with former waste disposal sites and past manufacturing operations.  Spending in 2011 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 may incur to protect our interest against those unasserted claims.  Our accrued liabilities for unasserted claims amounted to $3.2 million at September 30, 2011.  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 may 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 were material to operating results in 2011 and 2010 and are expected to be material to operating results in future years.

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 Our condensed balance sheets included liabilities for future environmental expenditures to investigate and remediate known sites amounting to $164.6 million at September 30, 2011, $167.6 million at December 31, 2010 and $170.5 million at September 30, 2010, of which $136.6 million, $139.6 million and $146.5 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.

Annual environmental-related cash outlays for site investigation and remediation, capital projects and normal plant operations are expected to range between approximately $50 million to $70 million over the next several years, $20 million to $40 million of which is for investigatory and remedial efforts, which are expected to be charged against reserves recorded on our balance sheet.  While we do not anticipate a material increase in the projected annual level of our environmental-related cash outlays, there is always the possibility that such an increase may occur in the future in view of the uncertainties associated with environmental exposures.  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 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

We, and our subsidiaries, are defendants in various legal actions (including proceedings based on alleged exposures to asbestos) incidental to our past and current business activities.  As of September 30, 2011, December 31, 2010 and September 30, 2010, our condensed balance sheets included liabilities for these legal actions of $16.1 million, $18.1 million and $18.9 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 legal actions will materially adversely affect our financial position or results of operations in the near term.

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, and therefore do not record gain contingencies and recognize income until it is earned and realizable.

Liquidity, Investment Activity and Other Financial Data

Cash Flow Data

	Nine Months Ended September 30,
	2011			2010
Provided By (Used For)	($ in millions)
Gain on remeasurement of investment in SunBelt	$	(181.4	)	$	—
Net operating activities		112.4			41.1
Capital expenditures		(128.4	)		(63.4	)
Business acquired in purchase transaction, net of cash acquired		(123.4	)		—
Restricted cash activity		30.4			—
Net investing activities		(211.8	)		(51.5	)
Long-term debt repayments		—			(18.9	)
Net financing activities		(40.9	)		(54.7	)

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Operating Activities

For the nine months ended September 30, 2011, cash provided by operating activities increased by $71.3 million from the nine months ended September 30, 2010, primarily due to higher earnings, partially offset by a larger increase in working capital.  For the nine months ended September 30, 2011, working capital increased $70.9 million compared to an increase of $63.9 million in 2010.  Receivables increased from December 31, 2010 by $79.6 million as a result of higher sales in the third quarter of 2011 compared with fourth quarter of 2010.  The 2011 cash from operations was also impacted by a $40.0 million increase in cash tax payments.  The nine months ended September 30, 2011 and 2010 included cash contributions to our Canadian qualified defined benefit pension plan of $0.7 million and $7.3 million, respectively.

Investing Activities

Capital spending of $128.4 million for the nine months ended September 30, 2011 was $65.0 million higher than the corresponding period in 2010.  Capital spending for the nine months ended September 30, 2011 included $39.4 million for the relocation of our Winchester centerfire ammunition manufacturing operations and $34.1 million for the conversion of our Charleston, TN facility from mercury cell technology to membrane technology.  For the total year 2011, we expect our capital spending to be approximately $255 million, which includes spending for these two projects.  The capital spending for the ongoing Winchester relocation will be partially financed by approximately $31 million of grants provided by the State of Mississippi and local governments, of which we had received $13.1 million as of September 30, 2011.  We expect depreciation to be in the $100 million range for 2011.

For the nine months ended September 30, 2011, we utilized $30.4 million of restricted cash that was required to be used to fund capital projects in Alabama, Mississippi and Tennessee.

On February 28, 2011, we acquired the remaining 50% interest in SunBelt and paid cash of $123.4 million, net of $8.9 million of cash acquired.

Financing Activities

In September 2010, we redeemed industrial revenue bonds totaling $18.9 million, with maturity dates of February 2016 and March 2016.  We paid a premium of $0.4 million to the bond holders, which was included in interest expense.  We also recognized a $0.3 million deferred gain in interest expense related to the interest rate swaps, which were terminated in April 2010, on these industrial revenue bonds.

We issued 0.5 million shares and 0.2 million shares representing stock options exercised for the nine months ended September 30, 2011 and 2010, respectively, with a total value of $9.3 million and $2.5 million, respectively.  We issued 0.6 million shares of common stock with a total value of $10.2 million to the CEOP for the nine months ended September 30, 2010.  Effective September 23, 2010, our CEOP plan began to purchase shares in the open market in lieu of our issuing shares to satisfy the investment in our common stock resulting from employee contributions, our matching contributions, retirement contributions and re-invested dividends.  Effective February 1, 2011, we reinstated the match on all salaried and certain non-bargained hourly employees’ contributions, which had previously been suspended effective January 1, 2010.

For the nine months ended September 30, 2011, we purchased and retired 0.1 million shares with a total value of $2.2 million under the share repurchase program approved by our Board of Directors on July 21, 2011.

The percent of total debt to total capitalization decreased to 36.9% at September 30, 2011 from 37.4% at December 31, 2010.  The decrease was due to higher shareholders’ equity resulting from the net income for the nine months ended September 30, 2011, partially offset by a higher level of long-term debt at September 30, 2011 resulting from the consolidation of the SunBelt Notes in conjunction with the acquisition.

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 In the first three quarters of 2011 and 2010, we paid a quarterly dividend of $0.20 per share.  Dividends paid for the nine months ended September 30, 2011 and 2010 were $48.0 million and $47.5 million, respectively.  On October 27, 2011, our board of directors declared a dividend of $0.20 per share on our common stock, payable on December 9, 2011 to shareholders of record on November 10, 2011.

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, restricted cash, cash flow from operations and borrowings under our senior revolving credit facility.  Additionally, we believe that we have access to the debt and equity markets.

Cash flow from operations is variable as a result of both the seasonal and the cyclical nature of our operating results, which have been affected by seasonal and economic cycles in many of the industries we serve, such as vinyls, urethanes, bleach, ammunition and pulp and paper.  The seasonality of the ammunition business, which is typically driven by the fall hunting season, and the seasonality of the vinyls and bleach businesses, which are stronger in periods of warmer weather, typically cause working capital to fluctuate between $50 million to $100 million over the course of the year.  Cash flow from operations is affected by changes in ECU selling prices caused by changes in the supply/demand balance of chlorine and caustic soda, resulting in the chlor alkali business having significant leverage on our earnings and cash flow.  For example, assuming all other costs remain constant and internal consumption remains approximately the same, a $10 per ECU selling price change equates to an approximate $18 million annual change in our revenues and pretax profit when we are operating at full capacity.

For the nine months ended September 30, 2011, cash provided by operating activities increased by $71.3 million from the nine months ended September 30, 2010, primarily due to higher earnings, partially offset by a larger increase in working capital.  For the nine months ended September 30, 2011, working capital increased $70.9 million compared to an increase of $63.9 million in 2010.  Receivables increased from December 31, 2010 by $79.6 million as a result of higher sales in the third quarter of 2011 compared with the fourth quarter of 2010.  The 2011 cash from operations was also impacted by a $40.0 million increase in cash tax payments.  The nine months ended September 30, 2011 and 2010 included cash contributions to our Canadian qualified defined benefit pension plan of $0.7 million and $7.3 million, respectively.

Capital spending of $128.4 million for the nine months ended September 30, 2011 was $65.0 million higher than the corresponding period in 2010.  Capital spending for the nine months ended September 30, 2011 included $39.4 million for the ongoing relocation of our Winchester centerfire ammunition manufacturing operations and $34.1 million for the conversion of our Charleston, TN facility from mercury cell technology to membrane technology.  For the total year 2011, we expect our capital spending to be approximately $255 million, which includes spending for these two projects.  The capital spending for the ongoing Winchester relocation will be partially financed by approximately $31 million of grants provided by the State of Mississippi and local governments, of which we had received $13.1 million as of September 30, 2011.  We expect depreciation to be in the $100 million range for 2011.

The use of cash of $140.3 million for the nine months ended September 30, 2011, primarily reflects the acquisition of the remaining 50% equity interest in SunBelt and normal seasonal growth in working capital.  Based on the seasonality of our working capital, our September 30, 2011 unrestricted cash balance of $318.3 million, the restricted cash balance of $71.6 million and the availability of $231.5 million of liquidity from our senior revolving credit facility, we believe we have sufficient liquidity to meet our short-term and long-term needs.  Additionally, we believe that we have access to the debt and equity markets.

On July 21, 2011, our board of directors authorized a share repurchase program for up to 5 million shares of common stock that will terminate in three years for any remaining shares not yet repurchased.  Since the date of authorization, 0.1 million shares were purchased and retired under this program at a cost of $2.2 million. As of September 30, 2011, we had purchased a total of 0.1 million shares under this program and 4.9 million shares remained authorized to be purchased.  The repurchases will be effected from time to time on the open market, or in privately negotiated transactions.

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In December 2010, we completed a financing of American Recovery and Reinvestment Act of 2009 (Recovery Zone) tax-exempt bonds totaling $41.0 million due 2035.  The bonds were issued by the Industrial Development Board of the County of Bradley and the City of Cleveland, TN (TN Authority) pursuant to a trust indenture between the TN Authority and U. S. Bank National Association, as trustee.  The bonds were sold to PNC Bank, National Association (PNC Bank), as administrative agent for itself and a syndicate of participating banks, in a private placement under a Credit and Funding Agreement dated December 27, 2010, between us and PNC Bank.  Proceeds of the bonds will be loaned by the TN Authority to us under a loan agreement, whereby we are obligated to make loan payments to the TN Authority sufficient to pay all debt service and expenses related to the bonds.  Our obligations under the loan agreement and related note bear interest at a fluctuating rate based on LIBOR.  The financial covenants in the credit agreement mirror those in our senior revolving credit facility.  The bonds may be tendered to us (without premium) periodically beginning November 1, 2015.  During December 2010, we drew $41.0 million of the bonds.  The proceeds from the bonds are required to be used to fund capital project spending for our Charleston, TN facility mercury cell conversion.  As of September 30, 2011, $38.9 million of the proceeds remain with the trustee and are classified as a noncurrent asset on our condensed balance sheet as restricted cash, until such time as we request reimbursement of qualifying amounts used for the Charleston, TN facility mercury cell conversion.

In December 2010, we completed a financing of Recovery Zone tax-exempt bonds totaling $42.0 million due 2033.  The bonds were issued by the Mississippi Business Finance Corporation (MS Finance) pursuant to a trust indenture between MS Finance and U. S. Bank National Association, as trustee.  The bonds were sold to PNC Bank as administrative agent for itself and a syndicate of participating banks, in a private placement under a Credit and Funding Agreement dated December 1, 2010, between us and PNC Bank.  Proceeds of the bonds will be loaned by MS Finance to us under a loan agreement, whereby we are obligated to make loan payments to MS Finance sufficient to pay all debt service and expenses related to the bonds.  Our obligations under the loan agreement and related note bear interest at a fluctuating rate based on LIBOR.  The financial covenants in the credit agreement mirror those in our senior revolving credit facility.  The bonds may be tendered to us (without premium) periodically beginning November 1, 2015.  During December 2010, we drew $42.0 million of the bonds.  The proceeds from the bonds are required to be used to fund capital project spending on our relocation of the Winchester centerfire ammunition manufacturing operations from East Alton, IL to Oxford, MS.  As of September 30, 2011, $22.3 million of the proceeds remain with the trustee and are classified as a noncurrent asset on our condensed balance sheet as restricted cash, until such time as we request reimbursement of qualifying amounts used for the Oxford, MS Winchester relocation.

In October 2010, we completed a financing of tax-exempt bonds totaling $70 million due 2024.  The bonds include $50 million issued pursuant to the Gulf Opportunity Go Zone Act of 2005 (Go Zone) and $20 million issued pursuant to the Recovery Zone Act.  The bonds were issued by the Industrial Development Authority of Washington County, AL (AL Authority) pursuant to a trust indenture between the AL Authority and U. S. Bank National Association, as trustee.  The bonds were sold to PNC Bank as administrative agent for itself and a syndicate of participating banks, in a private placement under a Credit and Funding Agreement dated October 14, 2010, between us and PNC Bank.  Proceeds of the bonds will be loaned by the AL Authority to us under a loan agreement, whereby we are obligated to make loan payments to the AL Authority sufficient to pay all debt service and expenses related to the bonds.  Our obligations under the loan agreement and related note bear interest at a fluctuating rate based on LIBOR.  The financial covenants in the credit agreement mirror those in our senior revolving credit agreement.  The bonds may be tendered to us (without premium) periodically beginning November 1, 2015.  We have the option to borrow up to the entire $70 million in a series of drawdowns through December 31, 2011.  During 2010, we drew $34.0 million of the bonds.  The proceeds from the bonds are required to be used to fund capital project spending at our McIntosh, AL facility.  As of September 30, 2011, $10.4 million of the drawn proceeds remain with the trustee and are classified as a noncurrent asset on our condensed balance sheet as restricted cash, until such time as we request reimbursement of qualifying amounts used for the capital project spending at our McIntosh, AL facility.

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 In September 2010, we redeemed industrial revenue bonds totaling $18.9 million, with maturity dates of February 2016 and March 2016.  We paid a premium of $0.4 million to the bond holders, which was included in interest expense.  We also recognized a $0.3 million deferred gain in interest expense related to the interest rate swaps, which were terminated in April 2010, on these industrial revenue bonds.  During the fourth quarter of 2010, an additional $1.8 million of industrial revenue bonds with maturities in 2016 were also redeemed.

Pursuant to a note purchase agreement dated December 22, 1997, SunBelt sold $97.5 million of Guaranteed Senior Secured Notes due 2017, Series O, and $97.5 million of Guaranteed Senior Secured Notes due 2017, Series G.  The SunBelt Notes bear interest at a rate of 7.23% per annum, payable semi-annually in arrears on each June 22 and December 22.  Beginning on December 22, 2002 and each year through 2017, SunBelt is required to repay $12.2 million of the SunBelt Notes, of which $6.1 million is attributable to the Series O Notes and of which $6.1 million is attributable to the Series G Notes.  In conjunction with the SunBelt acquisition, we consolidated the SunBelt Notes with a remaining principal balance of $85.3 million.

We have guaranteed the Series O Notes, and PolyOne, our former SunBelt partner, has guaranteed the Series G Notes, in both cases pursuant to customary guaranty agreements.  We have agreed to indemnify PolyOne for any payments or other costs under the guarantee in favor of the purchasers of the Series G Notes, to the extent any payments or other costs arise from a default or other breach under the SunBelt Notes.  If SunBelt does not make timely payments on the SunBelt Notes, whether as a result of a failure to pay on a guarantee or otherwise, the holders of the SunBelt Notes may proceed against the assets of SunBelt for repayment.

At September 30, 2011, we had $231.5 million available under our $240 million senior revolving credit facility, because we had issued $8.5 million of letters of credit under a $110 million subfacility.  The senior revolving credit facility will expire in October 2012.  We have the option to expand the $240 million senior revolving credit facility by an additional $60 million by adding a maximum of two additional lending institutions each year.  Under the senior revolving credit facility, we may select various floating rate borrowing options.  The actual interest rate paid on borrowings under the senior revolving credit facility is based on a pricing grid which is dependent upon the leverage ratio as calculated under the terms of the facility for the prior fiscal quarter.  The facility includes various customary restrictive covenants, including restrictions related to the ratio of debt to earnings before interest expense, taxes, depreciation and amortization (leverage ratio) and the ratio of earnings before interest expense, taxes, depreciation and amortization to interest expense (coverage ratio).  Compliance with these covenants is determined quarterly based on the operating cash flows for the last four quarters.  We were in compliance with all covenants and restrictions under all our outstanding credit agreements as of September 30, 2011 and 2010, and December 31, 2010, 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 of September 30, 2011, there were no covenants or other restrictions that limited our ability to borrow.

At September 30, 2011, we had total letters of credit of $34.4 million outstanding, of which $8.5 million were issued under our $240 million senior revolving credit facility.  In addition to our senior revolving credit facility, we have two letter of credit facilities totaling $28 million, which we reduced from $38 million during 2010.  The letters of credit were used to support certain long-term debt and certain workers compensation insurance policies.

We had a $75 million, 364-day accounts receivable securitization facility (Accounts Receivable Facility), renewable annually for five years, which would have expired in July 2012.  During the second quarter of 2010, we terminated the Accounts Receivable Facility.  Based on the liquidity from cash and cash equivalents, cash flow from operations and borrowings under our senior revolving credit facility, the Accounts Receivable Facility was no longer necessary.  There had been no borrowings under the Accounts Receivable Facility since 2007.  The Accounts Receivable Facility provided for the sale of our eligible trade receivables to a third party conduit through a wholly-owned, bankruptcy-remote, special purpose entity that was consolidated for financial statement purposes.  The Accounts Receivable Facility contained specific covenants relating to the ability of the lender to obtain or maintain a first priority lien on the receivables.  In addition, the Accounts Receivable Facility incorporated the leverage and coverage covenants that are contained in the senior revolving credit facility.

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 Our current debt structure is used to fund our business operations.  As of September 30, 2011, we had long-term borrowings, including current installments, of $589.6 million, of which $119.9 million was issued at variable rates.  We have entered into interest rate swaps on $218.0 million of our underlying fixed-rate debt obligations, whereby we agreed to pay variable rates to a counterparty who, in turn, pays us fixed rates.  The counterparties to these agreements are Citibank ($132.7 million) and Wells Fargo ($85.3 million).  We have designated the swap agreements as fair value hedges of the risk of changes in the value of fixed-rate debt due to changes in interest rates for a portion of our fixed-rate borrowings.  Accordingly, the swap agreements have been recorded at their fair market value of $14.0 million and are included in other assets and other liabilities on the accompanying condensed balance sheet, with a corresponding increase in the carrying amount of the related debt.  No gain or loss has been recorded as the contracts met the criteria to qualify for hedge accounting treatment with no ineffectiveness.  Commitments from banks under our senior revolving credit facility are an additional source of liquidity.

In May 2011, we entered into an $85.3 million interest rate swap on our SunBelt Notes.  In April 2010, Citibank terminated $18.9 million of interest rate swaps on our industrial revenue bonds due in 2016.  The result was a gain of $0.4 million, which would have been recognized through 2016.  In September 2010, the industrial revenue bonds were redeemed by us, and as a result, the remaining $0.3 million gain was recognized in interest expense.  In March 2010, we entered into $125.0 million of interest rate swaps on the 2016 Notes.

In 2001 and 2002, we entered into interest rate swaps on $75 million of our underlying fixed-rate debt obligations, whereby we agreed to pay variable rates to a counterparty who, in turn, pays us fixed rates.  The counterparty to these agreements is Citibank, a major financial institution.  In January 2009, we entered into a $75 million fixed interest rate swap with equal and opposite terms as the $75 million variable interest rate swaps on the 2011 Notes.  We have agreed to pay a fixed rate to a counterparty who, in turn, pays us variable rates.  The counterparty to this agreement is Bank of America, a major financial institution.  The result was a gain of $7.9 million on the $75 million variable interest rate swaps, which will be recognized through 2011.  As of September 30, 2011, $0.6 million of this gain was included in current installments of long-term debt.  In January 2009, we de-designated our $75 million interest rate swaps that had previously been designated as fair value hedges.  The $75 million variable interest rate swaps and the $75 million fixed interest rate swap do not meet the criteria for hedge accounting.  All changes in the fair value of these interest rate swaps are recorded currently in earnings.

Off-Balance Sheet Arrangements

In conjunction with the St. Gabriel, LA conversion and expansion project, which was completed in the fourth quarter of 2009, we entered into a twenty-year brine and pipeline supply agreement with PetroLogistics Olefins, LLC (PetroLogistics).  PetroLogistics installed, owns and operates, at its own expense, a pipeline supplying brine to the St. Gabriel, LA facility.  Beginning November 2009, we are obligated to make a fixed annual payment over the life of the contract of $2.0 million for use of the pipeline, regardless of the amount of brine purchased.  We also have a minimum usage requirement for brine of $8.4 million over the first five-year period of the contract.  After the first five-year period, the contract contains a buyout provision exercisable by us for $12.0 million.

On December 31, 1997, we entered into a long-term, sulfur dioxide supply agreement with Alliance Specialty Chemicals, Inc. (Alliance), formerly known as RFC S02, Inc.  Alliance has the obligation to deliver annually 36,000 tons of sulfur dioxide.  Alliance owns the sulfur dioxide plant, which is located at our Charleston, TN facility and is operated by us.  The price for the sulfur dioxide is fixed over the life of the contract, and under the terms of the contract, we are obligated to make a monthly payment of approximately $0.2 million regardless of the amount of sulfur dioxide purchased.  Commitments related to this agreement are approximately $2.4 million in 2011 and $0.6 million in 2012.  This supply agreement expires in 2012.

We guarantee debt and other obligations under agreements with our affiliated companies.  In the normal course of business, we guarantee the principal and interest under a $0.3 million line of credit of one of our wholly-owned foreign affiliates.  At September 30, 2011, December 31, 2010 and September 30, 2010, our wholly-owned foreign affiliate had no borrowings outstanding under this line of credit, which would be utilized for working capital purposes.

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New Accounting Standards

In September 2011, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2011-08 “Testing Goodwill for Impairment” (ASU 2011-08), which amends ASC 350 “Intangibles – Goodwill and Other.”  This update permits entities to make a qualitative assessment of whether it is more likely than not that a reporting unit’s fair value is less than its carrying amount before applying the two-step goodwill impairment test.  If an entity concludes that it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, it would not be required to perform the two-step impairment test for that reporting unit.  This update is effective for fiscal years beginning after December 15, 2011.  This update will not have a material effect on our consolidated financial statements.

In June 2011, the FASB issued ASU 2011-05 “Presentation of Comprehensive Income” (ASU 2011-05).  This update requires entities to present items of net income and other comprehensive income either in one continuous statement, referred to as the statement of comprehensive income, or in two separate, but consecutive, statements of net income and other comprehensive income.  This update is effective for fiscal years, and interim periods within those years, beginning after December 15, 2011, with retrospective applications required.  This update will require modification of our consolidated financial statements presentation in the first quarter of 2012.

In May 2011, the FASB issued ASU 2011-04 “Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in US GAAP and IFRSs”, (ASU 2011-04), which amends ASC 820.  This update clarifies the existing guidance and amends the wording used to describe many of the requirements in US GAAP for measuring fair value and for disclosing information about fair value measurements.  This update is effective for fiscal years, and interim periods within those years, beginning after December 15, 2011, with prospective application required.  This update will not have a material effect on our consolidated financial statements.

In December 2010, the FASB issued ASU 2010-29 “Disclosure of Supplementary Pro Forma Information for Business Combinations” (ASU 2010-29), which amends ASC 805 “Business Combinations” (ASC 805).  This update clarified that an entity is required to disclose pro forma revenue and earnings as though the business combination that occurred during the current period had occurred as of the beginning of the comparable prior annual reporting period only.  In addition, this standard expands the supplemental pro forma disclosures to include a description of the nature and amount of material nonrecurring pro forma adjustments directly attributable to the business combination included in the reported pro forma revenue and earnings.  We adopted the provisions of ASU 2010-29 on January 1, 2011.  The adoption of this update required additional disclosures for our acquisition of the remaining 50% equity interest in SunBelt.  This update did not have a material effect on our consolidated financial statements.

In January 2010, the FASB issued ASU 2010-06 “Improving Disclosures About Fair Value Measurements” (ASU 2010-06), which amends ASC 820.  This update adds new fair value disclosure requirements about transfers into and out of Level 1 and 2 and separate disclosures about purchases, sales, issuances and settlements related to Level 3 measurements.  This update expands disclosures on valuation techniques and inputs used to measure fair value.  This update is effective for fiscal years beginning after December 15, 2009, except for the requirement to provide the Level 3 activity of purchases, sales, issuances and settlements, which will be effective for fiscal years beginning after December 15, 2010.  We adopted the provisions of ASU 2010-06 on January 1, 2010, except for the requirement to provide the additional Level 3 activity, which was adopted on January 1, 2011.  The adoption of this update did not have a material effect on our consolidated financial statements.

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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 used in our Chlor Alkali Products segment, and certain raw materials and energy costs, namely copper, lead, zinc, electricity and natural gas used in our Winchester segment, are subject to price volatility.  Depending on market conditions, we may enter into futures contracts and put and call option contracts in order to reduce the impact of commodity price fluctuations.  As of September 30, 2011, we maintained open positions on futures contracts totaling $103.8 million ($53.4 million at December 31, 2010 and $55.8 million at September 30, 2010).  Assuming a hypothetical 10% increase in commodity prices which are currently hedged, as of September 30, 2011, we would experience a $10.4 million ($5.3 million at December 31, 2010 and $5.6 million at September 30, 2010) increase in our cost of inventory purchased, which would be substantially offset by a corresponding increase in the value of related hedging instruments.

We are exposed to changes in interest rates primarily as a result of our investing and financing activities.  The effect of interest rates on our investing activity is not material to our consolidated financial position, results of operations, or cash flows.  Our current debt structure is used to fund business operations, and commitments from banks under our senior revolving credit facility are a source of liquidity.  As of September 30, 2011, December 31, 2010 and September 30, 2010, we had long-term borrowings of $589.6 million, $496.0 million and $386.9 million, respectively, of which $119.9 million at September 30, 2011 and December 31, 2010 and $4.7 million at September 30, 2010 were issued at variable rates.  We have entered into $218.0 million of such swaps, whereby we agreed to pay variable rates to a counterparty who, in turn, pays us fixed rates.  The counterparties to these agreements are Citibank ($132.7 million) and Wells Fargo ($85.3 million).  In all cases, the underlying index for the variable rates is the six-month LIBOR.  Accordingly, payments are settled every six months and the terms of the swaps are the same as the underlying debt instruments.

In May 2011, we entered into an $85.3 million interest rate swap on our SunBelt Notes.  In April 2010, Citibank terminated $18.9 million of interest rate swaps on our industrial revenue bonds due in 2016.  The result was a gain of $0.4 million, which would have been recognized through 2016.  In September 2010, the industrial revenue bonds were redeemed by us, and as a result, the remaining $0.3 million gain was recognized in interest expense.  In March 2010, we entered into $125.0 million of interest rate swaps on the 2016 Notes.

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 In 2001 and 2002, we entered into interest rate swaps on $75 million of our underlying fixed-rate debt obligations, whereby we agreed to pay variable rates to a counterparty who, in turn, pays us fixed rates.  The counterparty to these agreements is Citibank, a major financial institution.  In January 2009, we entered into a $75 million fixed interest rate swap with equal and opposite terms as the $75 million variable interest rate swaps on the 2011 Notes.  We have agreed to pay a fixed rate to a counterparty who, in turn, pays us variable rates.  The counterparty to this agreement is Bank of America, a major financial institution.  The result was a gain of $7.9 million on the $75 million variable interest rate swaps, which will be recognized through 2011.  As of September 30, 2011, $0.6 million of this gain was included in current installments of long-term debt.

The following table reflects the swap activity related to certain debt obligations as of September 30, 2011:

Underlying Debt Instrument	Swap Amount		Date of Swap	Floating Rate
	($ in millions)			Olin Pays:
9.125%, due 2011	$	50.0	December 2001		3.86%
9.125%, due 2011	$	25.0	March 2002		3.0-4.0%	(a)
6.75%, due 2016	$	65.0	March 2010		3.5-4.5%	(a)
6.75%, due 2016	$	60.0	March 2010		3.5-4.5%	(a)
7.23%, SunBelt Notes	$	85.3	May 2011		5.0-6.0%	(a)
Industrial development obligation at a fixed interest rate of 6.625% due 2017	$	7.7	March 2002		0.72%
				Olin Receives:
9.125%, due 2011	$	75.0	January 2009		7.29%

(a)   Actual rate is set in arrears.  We project the rate will be within the range shown.

These interest rate swaps reduced interest expense by $5.8 million and $5.0 million for the nine months ended September 30, 2011 and 2010, respectively.

If the actual change in interest rates or commodities pricing is substantially different than expected, the net impact of interest rate risk or commodity 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.

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, 2011.  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, 2011, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Item 4T.  Controls and Procedures

Not applicable.

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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,” “estimate,” “project,” “forecast,” and variations of such words and similar expressions in this quarterly report to identify such forward-looking statements.  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 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 our Annual Report on Form 10-K for the year ended December 31, 2010, include, but are not limited to the following:

·   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, such as ammunition, housing, vinyls and pulp and paper, and the migration by United States customers to low-cost foreign locations;

·   the cyclical nature of our operating results, particularly declines in average selling prices in the chlor alkali industry 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;

·   economic and industry downturns that result in diminished product demand and excess manufacturing capacity in any of our segments and that, in many cases, result in lower selling prices and profits;

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

·   unexpected litigation outcomes;

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

·   the occurrence of unexpected manufacturing interruptions and outages, including those occurring as a result of labor disruptions and production hazards;

·   changes in legislation or government regulations or policies;

·   higher-than-expected raw material and energy, transportation and/or logistics costs;

·   weak industry conditions could affect our ability to comply with the financial maintenance covenants in our senior revolving credit facility and certain tax-exempt bonds;

·   the effects of any declines in global equity markets on asset values and any declines in interest rates used to value the liabilities in our pension plan;

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·   an increase in our indebtedness or higher-than-expected interest rates, affecting our ability to generate sufficient cash flow for debt service; and

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

 You should consider all of our forward-looking statements 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.

Part II - Other Information

Item 1.  Legal Proceedings.

Not Applicable.

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)	Total Number of Shares (or Units) Purchased as Part of Publicly Announced Plans or Programs		Maximum Number of Shares (or Units) that May Yet Be Purchased Under the Plans or Programs
July 1-31, 2011		—	—		—
August 1-31, 2011		124,546	17.93		124,546
September 1-30, 2011		—	—		—
Total							4,875,454	(1)

(1) On July 21, 2011, we announced a share repurchase program approved by the board of directors for the purchase of up to 5 million shares of common stock that will terminate on July 21, 2014.  Through September 30, 2011, 124,546 shares had been repurchased, and 4,875,454 shares remained available for purchase under that program.

Item 3.  Defaults Upon Senior Securities.

 Not Applicable.

Item 4.  Removed and Reserved.

Item 5.  Other Information

 Not Applicable.

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Item 6.  Exhibits.

11	Computation of Per Share Earnings (included in the Note-“Earnings Per Share” to Notes to Consolidated Financial Statements in Item 1)
12	Computation of Ratio of Earnings to Fixed Charges (Unaudited)
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(1)
101.SCH	XBRL Taxonomy Extension Schema Document(1)
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document(1)
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document(1)
101.LAB	XBRL Taxonomy Extension Label Linkbase Document(1)
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document(1)

(1) Pursuant to Rule 406T of Regulation S-T, the Interactive Data Files on Exhibit 101 hereto are deemed not filed or part of a registration statement or prospectus for purposes of Sections 11 or 12 of the Securities Act of 1933, as amended, are deemed not filed for purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, and otherwise are not subject to liability under those sections.

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SIGNATURES

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

OLIN CORPORATION
(Registrant)
By:	/s/ John E. Fischer
	Senior Vice President and Chief Financial Officer (Authorized Officer)

Date: October 28, 2011

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EXHIBIT INDEX

Exhibit No.	Description
11	Computation of Per Share Earnings (included in the Note-“Earnings Per Share” to Notes to Consolidated Financial Statements in Item 1)
12	Computation of Ratio of Earnings to Fixed Charges (Unaudited)
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(1)
101.SCH	XBRL Taxonomy Extension Schema Document(1)
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document(1)
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document(1)
101.LAB	XBRL Taxonomy Extension Label Linkbase Document(1)
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document(1)

(1) Pursuant to Rule 406T of Regulation S-T, the Interactive Data Files on Exhibit 101 hereto are deemed not filed or part of a registration statement or prospectus for purposes of Sections 11 or 12 of the Securities Act of 1933, as amended, are deemed not filed for purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, and otherwise are not subject to liability under those sections.

48

EX-12

Exhibit 12

OLIN CORPORATION AND CONSOLIDATED SUBSIDIARIES

Computation of Ratio of Earnings to Fixed Charges

(Unaudited)

	Nine Months Ended September 30,
	2011			2010
Earnings:	($ in millions)
Income before taxes	$	352.9		$	79.2
Add (deduct):
Equity in income of non-consolidated affiliates		(8.5	)		(22.8	)
Dividends received from non-consolidated affiliates		0.7			1.5
Capitalized interest		(0.7	)		(0.8	)
Fixed charges as described below		35.9			32.7
Total	$	380.3		$	89.8
Fixed charges:
Interest expensed and capitalized	$	23.2		$	20.3
Estimated interest factor in rent expense(1)		12.7			12.4
Total	$	35.9		$	32.7
Ratio of earnings to fixed charges		10.6			2.7

(1)         Amounts represent those portions of rent expense that are reasonable approximations of interest costs.

EX-31.1

Exhibit 31.1

CERTIFICATIONS

I, Joseph D. Rupp, 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 28, 2011	/s/ Joseph D. Rupp
	Joseph D. Rupp
	Chairman, President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATIONS

I, John E. Fischer, 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 28, 2011	/s/ John E. Fischer
	John E. Fischer
	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, 2011 as filed with the Securities and Exchange Commission (the “Report”), I, Joseph D. Rupp, Chairman, President and Chief Executive Officer and I, John E. Fischer, Senior 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/ Joseph D. Rupp

Joseph D. Rupp

Chairman, President and Chief Executive Officer

Dated: October 28, 2011

/s/ John E. Fischer

John E. Fischer

Senior Vice President and Chief Financial Officer

Dated: October 28, 2011

XML

COMMITMENTS AND CONTINGENCIES (Details) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2010
COMMITMENTS AND CONTINGENCIES [Abstract]
Legal action liabilities	$ 16.1	$ 18.1	$ 18.9

XML

Condensed Balance Sheets Parenthetical (USD $) In Millions, except Per Share data	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2010
ASSETS
Accumulated depreciation	$ 1,122.1	$ 1,068.1	$ 1,048.2
Shareholders' equity:
Common stock, par value	$ 1.00	$ 1.00	$ 1.00
Common stock, authorized	120.0	120.0	120.0
Common stock, issued	80.2	79.6	79.6
Common stock, outstanding	80.2	79.6	79.6

XML

Condensed Statements of Income (USD $) In Millions, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Condensed Statements of Income [Abstract]
Sales	$ 550.2	$ 432.8	$ 1,515.3	$ 1,200.5
Operating expenses:
Cost of goods sold	432.7	366.5	1,205.6	1,026.7
Selling and administration	39.8	33.3	121.8	101.3
Restructuring charges	4.1	0	6.6	0
Other operating income	4.3	0.3	5.9	2.6
Operating income	77.9	33.3	187.2	75.1
Earnings of non-consolidated affiliates	0.8	11.6	8.5	22.8
Interest expense	7.9	6.4	22.5	19.5
Interest income	0.2	0.3	0.7	0.7
Other (expense) income	(1.6)	0	179.0	0.1
Income before taxes	69.4	38.8	352.9	79.2
Income tax provision	22.2	7.0	129.9	16.4
Net income	$ 47.2	$ 31.8	$ 223.0	$ 62.8
Net income per common share:
Basic	$ 0.59	$ 0.40	$ 2.79	$ 0.79
Diluted	$ 0.58	$ 0.40	$ 2.76	$ 0.79
Dividends per common share	$ 0.20	$ 0.20	$ 0.60	$ 0.60
Average common shares outstanding:
Basic	80.2	79.4	79.9	79.1
Diluted	80.8	80.2	80.8	79.8

XML

ACQUISITION (Tables)

9 Months Ended

Sep. 30, 2011

ACQUISITION [Abstract]

Summary of the final allocation of purchase price to SunBelt's assets and liabilities

The following table summarizes the final allocation of the purchase price to SunBelt’s assets and liabilities:

	February 28, 2011
	($ in millions)
Total current assets	$	37.6
Property, plant and equipment		87.4
Deferred income taxes		0.4
Other assets		5.8
Total assets acquired		131.2
Total current liabilities		42.7
Long-term debt		75.1
Other liabilities		27.6
Total liabilities assumed		145.4
Less:  Investment in SunBelt		(0.8	)
Net liabilities assumed		(13.4	)
Liabilities for uncertainties		48.3
Gain on remeasurement of investment in SunBelt		(181.4	)
Goodwill		327.1
Fair value of assets acquired	$	180.6

Included in total current assets are cash and cash equivalents of $8.9 million.  Included in total current liabilities is $12.2 million of current installments of long-term debt.

Pro forma summary

The following pro forma summary presents the condensed statements of income as if the acquisition of SunBelt had occurred on January 1, 2010.

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2010		2011		2010
	($ in millions, except per share data)
Sales	$	484.4	$	1,541.6	$	1,321.1
Net income		44.9		121.9		86.4
Net income per common share:
Basic	$	0.57	$	1.53	$	1.09
Diluted	$	0.56	$	1.51	$	1.08

XML

Document And Entity Information (USD $)	9 Months Ended
	Sep. 30, 2011	Jun. 30, 2010
Entity Registrant Name	Olin Corporation
Entity Central Index Key	0000074303
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float		$ 1,426,484,996
Entity Common Stock, Shares Outstanding	80,162,837
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q3
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2011

XML

DERIVATIVE FINANCIAL INSTRUMENTS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended																																																												3 Months Ended		9 Months Ended																																			3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2010	Sep. 30, 2011	Dec. 31, 2010	Apr. 30, 2010	Mar. 31, 2010	Sep. 30, 2011 Forward Contracts Buy Foreign Currencies [Member]	Dec. 31, 2010 Forward Contracts Buy Foreign Currencies [Member]	Sep. 30, 2010 Forward Contracts Buy Foreign Currencies [Member]	Sep. 30, 2011 Forward Contracts Sell Foreign Currencies [Member]	Dec. 31, 2010 Forward Contracts Sell Foreign Currencies [Member]	Sep. 30, 2010 Forward Contracts Sell Foreign Currencies [Member]	Sep. 30, 2011 Variable Interest Rate Swaps [Member]	Jan. 31, 2009 Variable Interest Rate Swaps [Member]	Jan. 31, 2009 Fixed Interest Rate Swap [Member]	Sep. 30, 2011 Interest Rate Swaps Designated As Fair Value Hedges [Member]	May 31, 2011 Interest Rate Swaps Designated As Fair Value Hedges [Member]	Dec. 31, 2010 Interest Rate Swaps Designated As Fair Value Hedges [Member]	Sep. 30, 2010 Interest Rate Swaps Designated As Fair Value Hedges [Member]	Mar. 31, 2010 Interest Rate Swap On 2016 Notes [Member]	Sep. 30, 2011 Copper Commodity Forward Contracts [Member]	Dec. 31, 2010 Copper Commodity Forward Contracts [Member]	Sep. 30, 2010 Copper Commodity Forward Contracts [Member]	Sep. 30, 2011 Zinc Commodity Forward Contracts [Member]	Dec. 31, 2010 Zinc Commodity Forward Contracts [Member]	Sep. 30, 2010 Zinc Commodity Forward Contracts [Member]	Sep. 30, 2011 Lead Commodity Forward Contracts [Member]	Dec. 31, 2010 Lead Commodity Forward Contracts [Member]	Sep. 30, 2010 Lead Commodity Forward Contracts [Member]	Sep. 30, 2011 Natural Gas Commodity Forward Contracts [Member]	Dec. 31, 2010 Natural Gas Commodity Forward Contracts [Member]	Sep. 30, 2010 Natural Gas Commodity Forward Contracts [Member]	Sep. 30, 2011 Designated as Hedging Instrument [Member]	Dec. 31, 2010 Designated as Hedging Instrument [Member]	Sep. 30, 2010 Designated as Hedging Instrument [Member]	Sep. 30, 2011 Designated as Hedging Instrument [Member] Other Current Assets [Member] Interest Rate Contracts [Member]	Dec. 31, 2010 Designated as Hedging Instrument [Member] Other Current Assets [Member] Interest Rate Contracts [Member]	Sep. 30, 2010 Designated as Hedging Instrument [Member] Other Current Assets [Member] Interest Rate Contracts [Member]	Sep. 30, 2011 Designated as Hedging Instrument [Member] Other Current Assets [Member] Commodity Contracts Gains [Member]	Dec. 31, 2010 Designated as Hedging Instrument [Member] Other Current Assets [Member] Commodity Contracts Gains [Member]	Sep. 30, 2010 Designated as Hedging Instrument [Member] Other Current Assets [Member] Commodity Contracts Gains [Member]	Sep. 30, 2011 Designated as Hedging Instrument [Member] Other Current Assets [Member] Commodity Contracts Losses [Member]	Dec. 31, 2010 Designated as Hedging Instrument [Member] Other Current Assets [Member] Commodity Contracts Losses [Member]	Sep. 30, 2010 Designated as Hedging Instrument [Member] Other Current Assets [Member] Commodity Contracts Losses [Member]	Sep. 30, 2011 Designated as Hedging Instrument [Member] Other Assets [Member] Interest Rate Contracts [Member]	Dec. 31, 2010 Designated as Hedging Instrument [Member] Other Assets [Member] Interest Rate Contracts [Member]	Sep. 30, 2010 Designated as Hedging Instrument [Member] Other Assets [Member] Interest Rate Contracts [Member]	Sep. 30, 2011 Designated as Hedging Instrument [Member] Current Installments of Long-term Debt [Member] Interest Rate Contracts [Member]	Dec. 31, 2010 Designated as Hedging Instrument [Member] Current Installments of Long-term Debt [Member] Interest Rate Contracts [Member]	Sep. 30, 2010 Designated as Hedging Instrument [Member] Current Installments of Long-term Debt [Member] Interest Rate Contracts [Member]	Sep. 30, 2011 Designated as Hedging Instrument [Member] Other Liabilities [Member] Interest Rate Contracts [Member]	Dec. 31, 2010 Designated as Hedging Instrument [Member] Other Liabilities [Member] Interest Rate Contracts [Member]	Sep. 30, 2010 Designated as Hedging Instrument [Member] Other Liabilities [Member] Interest Rate Contracts [Member]	Sep. 30, 2011 Designated as Hedging Instrument [Member] Accrued Liabilities [Member] Commodity Contracts Gains [Member]	Dec. 31, 2010 Designated as Hedging Instrument [Member] Accrued Liabilities [Member] Commodity Contracts Gains [Member]	Sep. 30, 2010 Designated as Hedging Instrument [Member] Accrued Liabilities [Member] Commodity Contracts Gains [Member]	Sep. 30, 2011 Designated as Hedging Instrument [Member] Accrued Liabilities [Member] Commodity Contracts Losses [Member]	Dec. 31, 2010 Designated as Hedging Instrument [Member] Accrued Liabilities [Member] Commodity Contracts Losses [Member]	Sep. 30, 2010 Designated as Hedging Instrument [Member] Accrued Liabilities [Member] Commodity Contracts Losses [Member]	Sep. 30, 2011 Designated as Hedging Instrument [Member] Long-term Debt [Member] Interest Rate Contracts [Member]	Dec. 31, 2010 Designated as Hedging Instrument [Member] Long-term Debt [Member] Interest Rate Contracts [Member]	Sep. 30, 2010 Designated as Hedging Instrument [Member] Long-term Debt [Member] Interest Rate Contracts [Member]	Sep. 30, 2011 Derivatives Not Designated as Hedging Instruments [Member]	Sep. 30, 2010 Derivatives Not Designated as Hedging Instruments [Member]	Sep. 30, 2011 Derivatives Not Designated as Hedging Instruments [Member]	Sep. 30, 2010 Derivatives Not Designated as Hedging Instruments [Member]	Sep. 30, 2011 Not Designated as Hedging Instrument [Member]	Dec. 31, 2010 Not Designated as Hedging Instrument [Member]	Sep. 30, 2010 Not Designated as Hedging Instrument [Member]	Sep. 30, 2011 Not Designated as Hedging Instrument [Member] Other Current Assets [Member] Interest Rate Contracts [Member]	Dec. 31, 2010 Not Designated as Hedging Instrument [Member] Other Current Assets [Member] Interest Rate Contracts [Member]	Sep. 30, 2010 Not Designated as Hedging Instrument [Member] Other Current Assets [Member] Interest Rate Contracts [Member]	Sep. 30, 2011 Not Designated as Hedging Instrument [Member] Other Current Assets [Member] Commodity Contracts Gains [Member]	Dec. 31, 2010 Not Designated as Hedging Instrument [Member] Other Current Assets [Member] Commodity Contracts Gains [Member]	Sep. 30, 2010 Not Designated as Hedging Instrument [Member] Other Current Assets [Member] Commodity Contracts Gains [Member]	Sep. 30, 2011 Not Designated as Hedging Instrument [Member] Other Current Assets [Member] Commodity Contracts Losses [Member]	Dec. 31, 2010 Not Designated as Hedging Instrument [Member] Other Current Assets [Member] Commodity Contracts Losses [Member]	Sep. 30, 2010 Not Designated as Hedging Instrument [Member] Other Current Assets [Member] Commodity Contracts Losses [Member]	Sep. 30, 2011 Not Designated as Hedging Instrument [Member] Other Current Assets [Member] Foreign Currency Contracts [Member]	Dec. 31, 2010 Not Designated as Hedging Instrument [Member] Other Current Assets [Member] Foreign Currency Contracts [Member]	Sep. 30, 2010 Not Designated as Hedging Instrument [Member] Other Current Assets [Member] Foreign Currency Contracts [Member]	Sep. 30, 2011 Not Designated as Hedging Instrument [Member] Other Assets [Member] Interest Rate Contracts [Member]	Dec. 31, 2010 Not Designated as Hedging Instrument [Member] Other Assets [Member] Interest Rate Contracts [Member]	Sep. 30, 2010 Not Designated as Hedging Instrument [Member] Other Assets [Member] Interest Rate Contracts [Member]	Sep. 30, 2011 Not Designated as Hedging Instrument [Member] Other Liabilities [Member] Interest Rate Contracts [Member]	Dec. 31, 2010 Not Designated as Hedging Instrument [Member] Other Liabilities [Member] Interest Rate Contracts [Member]	Sep. 30, 2010 Not Designated as Hedging Instrument [Member] Other Liabilities [Member] Interest Rate Contracts [Member]	Sep. 30, 2011 Not Designated as Hedging Instrument [Member] Accrued Liabilities [Member] Interest Rate Contracts [Member]	Dec. 31, 2010 Not Designated as Hedging Instrument [Member] Accrued Liabilities [Member] Interest Rate Contracts [Member]	Sep. 30, 2010 Not Designated as Hedging Instrument [Member] Accrued Liabilities [Member] Interest Rate Contracts [Member]	Sep. 30, 2011 Not Designated as Hedging Instrument [Member] Accrued Liabilities [Member] Commodity Contracts Gains [Member]	Dec. 31, 2010 Not Designated as Hedging Instrument [Member] Accrued Liabilities [Member] Commodity Contracts Gains [Member]	Sep. 30, 2010 Not Designated as Hedging Instrument [Member] Accrued Liabilities [Member] Commodity Contracts Gains [Member]	Sep. 30, 2011 Not Designated as Hedging Instrument [Member] Accrued Liabilities [Member] Commodity Contracts Losses [Member]	Dec. 31, 2010 Not Designated as Hedging Instrument [Member] Accrued Liabilities [Member] Commodity Contracts Losses [Member]	Sep. 30, 2010 Not Designated as Hedging Instrument [Member] Accrued Liabilities [Member] Commodity Contracts Losses [Member]	Sep. 30, 2011 Not Designated as Hedging Instrument [Member] Accrued Liabilities [Member] Foreign Currency Contracts [Member]	Dec. 31, 2010 Not Designated as Hedging Instrument [Member] Accrued Liabilities [Member] Foreign Currency Contracts [Member]	Sep. 30, 2010 Not Designated as Hedging Instrument [Member] Accrued Liabilities [Member] Foreign Currency Contracts [Member]	Sep. 30, 2011 Interest Rate Contracts [Member] Derivatives Not Designated as Hedging Instruments [Member] Interest Expense [Member]	Sep. 30, 2010 Interest Rate Contracts [Member] Derivatives Not Designated as Hedging Instruments [Member] Interest Expense [Member]	Sep. 30, 2011 Interest Rate Contracts [Member] Derivatives Not Designated as Hedging Instruments [Member] Interest Expense [Member]	Sep. 30, 2010 Interest Rate Contracts [Member] Derivatives Not Designated as Hedging Instruments [Member] Interest Expense [Member]	Sep. 30, 2011 Foreign Currency Contracts [Member] Derivatives Not Designated as Hedging Instruments [Member] Selling and Administration [Member]	Sep. 30, 2010 Foreign Currency Contracts [Member] Derivatives Not Designated as Hedging Instruments [Member] Selling and Administration [Member]	Sep. 30, 2011 Foreign Currency Contracts [Member] Derivatives Not Designated as Hedging Instruments [Member] Selling and Administration [Member]	Sep. 30, 2010 Foreign Currency Contracts [Member] Derivatives Not Designated as Hedging Instruments [Member] Selling and Administration [Member]	Sep. 30, 2011 Commodity Contracts [Member] Derivatives Not Designated as Hedging Instruments [Member] Cost of Goods Sold [Member]	Sep. 30, 2010 Commodity Contracts [Member] Derivatives Not Designated as Hedging Instruments [Member] Cost of Goods Sold [Member]	Sep. 30, 2011 Commodity Contracts [Member] Derivatives Not Designated as Hedging Instruments [Member] Cost of Goods Sold [Member]	Sep. 30, 2010 Commodity Contracts [Member] Derivatives Not Designated as Hedging Instruments [Member] Cost of Goods Sold [Member]	Sep. 30, 2011 Interest Rate Contracts [Member] Derivatives - Fair Value Hedges [Member] Interest Expense [Member]	Sep. 30, 2010 Interest Rate Contracts [Member] Derivatives - Fair Value Hedges [Member] Interest Expense [Member]	Sep. 30, 2011 Interest Rate Contracts [Member] Derivatives - Fair Value Hedges [Member] Interest Expense [Member]	Sep. 30, 2010 Interest Rate Contracts [Member] Derivatives - Fair Value Hedges [Member] Interest Expense [Member]	Sep. 30, 2011 Derivatives - Cash Flow Hedges [Member]	Sep. 30, 2010 Derivatives - Cash Flow Hedges [Member]	Sep. 30, 2011 Derivatives - Cash Flow Hedges [Member]	Sep. 30, 2010 Derivatives - Cash Flow Hedges [Member]	Sep. 30, 2011 Derivatives - Cash Flow Hedges [Member] Cost of Goods Sold [Member]	Sep. 30, 2010 Derivatives - Cash Flow Hedges [Member] Cost of Goods Sold [Member]	Sep. 30, 2011 Derivatives - Cash Flow Hedges [Member] Cost of Goods Sold [Member]	Sep. 30, 2010 Derivatives - Cash Flow Hedges [Member] Cost of Goods Sold [Member]
Derivative [Line Items]
Notional amount						$ 0	$ 0.3	$ 1.3	$ 0	$ 0	$ 0.2	$ 75.0		$ 75.0	$ 218.0	$ 85.3	$ 132.7	$ 132.7	$ 125.0	$ 54.3	$ 25.1	$ 26.0	$ 7.7	$ 3.2	$ 3.4	$ 36.1	$ 19.6	$ 19.7	$ 5.7	$ 5.5	$ 6.7
Fixed interest rate on debt underlying interest rate swap		9.125%			6.75%
Gain on variable interest rate swaps, which will be recognized through 2011													7.9
Amount of gain included in current installments of long-term debt												0.6
Cash flow hedges [Abstract]
Amount of commodity forward contracts with Wells Fargo		67.5
Gain if all open futures contracts were settled		14.3
Approximate amount of deferred gains would be reclassified into earnings during the next twelve months		11.7
Fair value hedges [Abstract]
Amount of terminated interest rate swaps on our industrial revenue bonds				18.9
Gain on terminated interest rate swaps on our industrial revenue bonds				0.4
Gain on terminated interest rate swaps on recognized in interest expense upon redemption of our industrial revenue bonds	0.3
Derivatives, Fair Value [Line Items]
Asset Derivatives	25.9	15.1	26.0																													14.3	22.2	21.2	0	0	0	0	16.9	10.6	0	0	(0.2)	14.3	5.3	10.8																				0.8	3.8	4.7	0.8	3.8	0	0	0	0	0	0	0	0	0	0	0	0	4.7
Liability Derivatives	16.5	29.8	9.5																													29.1	8.1	14.3													0.6	2.8	0	0.2	0	0	(2.3)	0	0	16.6	0	0	14.0	5.3	14.3					0.7	1.4	2.2																0	0	1.3	0.3	1.2	0	0	(0.1)	0	0.4	0.3	0.8	0	0	0.1
Derivative Instruments, Gain (Loss) [Line Items]
Recognized in other comprehensive loss (effective portion)																																																																																																																			(21.7)	12.9	(21.3)	(1.2)
Reclassified from accumulated other comprehensive loss into income (effective portion)																																																																																																																							1.2	(1.1)	11.8	6.6
Amount of gain (loss)																																																														(0.5)	(0.7)	(0.8)	(1.0)																																		(0.1)	0.1	0	0.3	0	0.1	0	(0.1)	(0.4)	(0.9)	(0.8)	(1.2)	1.8	1.9	5.8	4.7
Credit risk and collateral [Abstract]
Amounts recognized in other current assets or (accrued liabilities) for cash collateral provided by us to counterparties.		(7.0)
Amounts recognized in other current assets or (accrued liabilities) for cash collateral provided to us by counterparties	0.7		3.2
Amount of interest rate swap with Wells Fargo		85.3
Amount of interest rate swap with Citi bank		$ 132.7

XML

INVENTORIES (Tables)

9 Months Ended

Sep. 30, 2011

INVENTORIES [Abstract]

Inventories Table

Inventories consisted of the following:

	September 30, 2011			December 31, 2010			September 30, 2010
	($ in millions)
Supplies	$	32.8		$	30.8		$	29.3
Raw materials		69.8			56.5			59.8
Work in process		32.4			24.7			27.8
Finished goods		104.9			104.4			103.3
		239.9			216.4			220.2
LIFO reserve		(73.6	)		(60.8	)		(62.9	)
Inventories, net	$	166.3		$	155.6		$	157.3

XML

INCOME TAXES (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Effective Tax Rate Reconciliation (Percent)
Statutory federal tax rate (in hundredths)	35.00%	35.00%	35.00%	35.00%
Foreign rate differential (in hundredths)	(0.10%)	(0.60%)	0.00%	(0.40%)
Domestic manufacturing/export tax incentive (in hundredths)	(1.60%)	0.80%	(0.80%)	0.00%
Dividends paid to CEOP (in hundredths)	(0.40%)	(1.00%)	(0.20%)	(1.40%)
State income taxes, net (in hundredths)	2.40%	2.00%	1.20%	1.70%
Change in tax contingencies	(5.20%)	(16.10%)	(1.00%)	(11.40%)
Remeasurement of deferred taxes (in hundredths)	0.00%	0.00%	(1.40%)	0.00%
Change in valuation allowance (in hundredths)	0.00%	0.30%	0.00%	(1.60%)
Return to provision (in hundredths)	2.00%	(2.60%)	0.60%	(1.90%)
Incremental tax effect of SunBelt remeasurement (in hundredths)	0.00%	0.00%	3.50%	0.00%
Other, net (in hundredths)	(0.10%)	0.20%	(0.10%)	0.70%
Effective tax rate (in hundredths)	32.00%	18.00%	36.80%	20.70%
Benefit related to re-measurement of deferred taxes due to an increase in state tax effective rates			$ 4.9
Deferred tax expense related to re-measurement of equity interest			76.0
Previous equity percentage in SunBelt (in hundredths)	50.00%		50.00%
Benefit (expense) related to the release of portion of a valuation allowance against foreign tax credit carryforward deferred tax asset		(0.1)		1.3
Return to provision	1.4		2.1
Unrecognized Tax Benefits [Abstract]
Impact on the effective tax rate, if recognized	36.6	40.1	36.6	40.1
Portion of tax benefit previously included in discontinued operations			2.1
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Balance at beginning of year			41.5	50.8
Increases for prior year tax positions			0.2	0.2
Decreases for prior year tax positions			0	(0.3)
Increases for current year tax positions			0	1.8
Decreases for current year tax positions			0	(0.1)
Decreases due to settlement with taxing authorities			0	(2.2)
Reductions due to statute of limitations			(3.0)	(7.8)
Balance at end of period	38.7	42.4	38.7	42.4
Unrecognized tax benefits decrease over next twelve months	$ 2.6		$ 2.6
U. S. Federal Income Tax [Member]
Income Tax Examination [Line Items]
Tax Returns Subject to Examinations			2007 - 2010
U. S. State Income Tax [Member]
Income Tax Examination [Line Items]
Tax Returns Subject to Examinations			2004 - 2010
Canadian Federal Income Tax [Member]
Income Tax Examination [Line Items]
Tax Returns Subject to Examinations			2007 - 2010
Canadian Provincial Income Tax [Member]
Income Tax Examination [Line Items]
Tax Returns Subject to Examinations			2006 - 2010

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INVENTORIES

9 Months Ended

Sep. 30, 2011

INVENTORIES [Abstract]

INVENTORIES

INVENTORIES

Inventories consisted of the following:

	September 30, 2011			December 31, 2010			September 30, 2010
	($ in millions)
Supplies	$	32.8		$	30.8		$	29.3
Raw materials		69.8			56.5			59.8
Work in process		32.4			24.7			27.8
Finished goods		104.9			104.4			103.3
		239.9			216.4			220.2
LIFO reserve		(73.6	)		(60.8	)		(62.9	)
Inventories, net	$	166.3		$	155.6		$	157.3

In conjunction with the acquisition of SunBelt, we obtained inventories with a fair value of $4.0 million, as of February 28, 2011.  Inventories are valued at the lower of cost or market, with cost being determined principally by the dollar value last-in, first-out (LIFO) method of inventory accounting.  Cost for other inventories has been determined principally by the average cost method, primarily operating supplies, spare parts and maintenance parts.  Elements of costs in inventories included raw materials, direct labor and manufacturing overhead.  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, 2011, reflect certain estimates relating to inventory quantities and costs at December 31, 2011.  If the first-in, first-out (FIFO) method of inventory accounting had been used, inventories would have been approximately $73.6 million, $60.8 million and $62.9 million higher than reported at September 30, 2011, December 31, 2010 and September 30, 2010, respectively.

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EARNINGS PER SHARE (Tables)

9 Months Ended

Sep. 30, 2011

EARNINGS PER SHARE [Abstract]

Basic and Diluted Earnings Per Share Table

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
Computation of Income per Share	($ and shares in millions, except per share data)
Net income	$	47.2	$	31.8	$	223.0	$	62.8
Basic shares		80.2		79.4		79.9		79.1
Basic net income per share	$	0.59	$	0.40	$	2.79	$	0.79
Diluted shares:
Basic shares		80.2		79.4		79.9		79.1
Stock-based compensation		0.6		0.8		0.9		0.7
Diluted shares		80.8		80.2		80.8		79.8
Diluted net income per share	$	0.58	$	0.40	$	2.76	$	0.79

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SHAREHOLDERS' EQUITY (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Jul. 21, 2011
SHAREHOLDERS' EQUITY [Abstract]
Authorized share repurchase program (in shares)			5.0
Stock repurchase program period in force (in years)			3
Common stock repurchased and retired (in shares)	(0.1)
Common stock repurchased and retired	$ (2.2)
Total repurchased shares under this program (in shares)	0.1
Remaining shares authorized to be purchased (in shares)	4.9
Stock options exercised	0.5	0.2
Total value of stock options exercised	9.3	2.5
Shares issued in connection with CEOP Plan (in shares)		0.6
Value of shares for issued CEOP plan		10.2
Foreign Currency Translation Adjustment [Abstract]
Beginning balance	0.4	(0.5)
Unrealized gains (losses)	2.3	(0.6)
Ending balance	2.7	(1.1)
Unrealized Gains (Losses) on Derivative Contracts (net of taxes) [Abstract]
Beginning balance	11.6	11.6
Unrealized gains (losses)	(13.0)	(0.8)
Reclassification adjustments into income	(7.2)	(4.1)
Ending balance	(8.6)	6.7
Pension and Postretirement Benefits (net of taxes) [Abstract]
Beginning balance	(273.8)	(259.3)
Reclassification adjustments into income	9.1	7.4
Ending balance	(264.7)	(251.9)
Accumulated Other Comprehensive Loss [Abstract]
Beginning balance	(261.8)	(248.2)
Unrealized gains (losses)	(10.7)	(1.4)
Reclassification adjustments into income	1.9	3.3
Ending balance	(270.6)	(246.3)
Deferred tax (benefit) provision on unrealized gains and losses on derivative contracts	12.9	(3.0)
Deferred tax provision pension and postretirement benefits	$ 5.9	$ 4.5

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RESTRUCTURING CHARGE (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended			9 Months Ended		3 Months Ended			9 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010	Sep. 30, 2011 Employee severance and job related benefits [Member]	Dec. 31, 2010 Employee severance and job related benefits [Member]	Dec. 31, 2010 Employee severance and job related benefits [Member] Chlor Alkali Products Segment [Member]	Dec. 31, 2010 Employee severance and job related benefits [Member] Winchester Segment [Member]	Dec. 31, 2010 Write-off of equipment and facility costs [Member] Chlor Alkali Products Segment [Member]	Sep. 30, 2011 Facility Exit Costs (asset retirement obligations [Member]	Dec. 31, 2010 Facility Exit Costs (asset retirement obligations [Member]	Sep. 30, 2011 Lease and other contract termination costs [Member]	Dec. 31, 2010 Lease and other contract termination costs [Member]	Dec. 31, 2010 Lease and other contract termination costs [Member] Chlor Alkali Products Segment [Member]	Sep. 30, 2011 Pension and other postretirement benefits curtailment [Member]	Dec. 31, 2010 Pension and other postretirement benefits curtailment [Member]	Dec. 31, 2010 Pension and other postretirement benefits curtailment [Member] Winchester Segment [Member]	Dec. 31, 2010 Accelerated Asset Retirement Obligations [Member] Chlor Alkali Products Segment [Member]	Sep. 30, 2011 Employee Relocation Cost [Member]	Dec. 31, 2010 Employee Relocation Cost [Member]	Sep. 30, 2011 Chlor Alkali Products Segment [Member]	Dec. 31, 2010 Chlor Alkali Products Segment [Member]	Sep. 30, 2011 Chlor Alkali Products Segment [Member]	Sep. 30, 2011 Winchester Segment [Member]	Dec. 31, 2010 Winchester Segment [Member]	Sep. 30, 2011 Winchester Segment [Member]
RESTRUCTURING CHARGE [Abstract]
Previous mercury cell capacity tonnage at Charleston, TN facility (in tons)	260,000		260,000
Membrane capacity tonnage capability at Charleston, TN facility (in tons)	200,000		200,000
Estimated capital cost converting Charleston, TN facility	$ 160.0		$ 160.0
Tonnage reduction in chlor alkali manufacturing capacity (in tons)	100,000		100,000
Percentage reduction of electricity usage per ECU produced (in hundredths)	25.00%		25.00%
Percentage of capital spending offset provided by State of Mississippi tax incentives (in hundredths)	40.00%		40.00%
Estimated five-year project cost for Winchester relocation	110.0		110.0
Estimated capital spending for Winchester relocation	80.0		80.0
Forecast annual reduction of Winchester's annual operating costs			30.0
Restructuring charge	4.1	0	6.6	0		3.7		2.8	3.2	17.5	0.5		0		1.0	1.1		3.0	6.7	1.3		2.0	28.0	2.3	2.1	6.2	4.3
Amounts Utilized			(3.3)			(0.2)					(0.5)		(0.2)			(1.1)				(1.3)
Accrued restructuring costs	10.3		10.3		7.0	9.5	6.0				0	0	0.8	1.0		0	0			0	0
Restructuring And Related Cost Expected Cost																								8.0			18.0
Cash Expenditures Incurred			$ 2.2
Term of Winchester East Alton, IL union labor agreement (in years)	5.5		5.5

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ALLOWANCE FOR DOUBTFUL ACCOUNTS RECEIVABLES (Tables)

9 Months Ended

Sep. 30, 2011

Accounts Receivable, Net [Abstract]

Allowance for Doubtful Accounts Receivable

Allowance for doubtful accounts receivable consisted of the following:

	September 30,
	2011			2010
	($ in millions)
Balance at beginning of year	$	4.8		$	3.3
Provisions charged		0.8			0.2
(Write-offs) recoveries, net		(1.7	)		0.1
Balance at end of period	$	3.9		$	3.6

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STOCK-BASED COMPENSATION

9 Months Ended

Sep. 30, 2011

STOCK-BASED COMPENSATION [Abstract]

STOCK-BASED COMPENSATION

STOCK-BASED COMPENSATION

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

	Three Months Ended September 30,					Nine Months Ended September 30,
	2011			2010		2011			2010
	($ in millions)
Stock-based compensation	$	1.9		$	2.2	$	6.7		$	7.9
Mark-to-market adjustments		(2.0	)		0.9		(1.2	)		1.1
Total (income) expense	$	(0.1	)	$	3.1	$	5.5		$	9.0

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	2011			2010
Dividend yield		4.32	%		4.32	%
Risk-free interest rate		3.05	%		3.00	%
Expected volatility		42	%		42	%
Expected life (years)		7.0			7.0
Grant fair value (per option)	$	5.48		$	4.61
Exercise price	$	18.78		$	15.68
Shares granted		575,000			803,750

Dividend yield for 2011 and 2010 was based on a historical average.  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 of future exercise patterns.

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DESCRIPTION OF BUSINESS

9 Months Ended

Sep. 30, 2011

DESCRIPTION OF BUSINESS [Abstract]

DESCRIPTION OF BUSINESS

DESCRIPTION OF BUSINESS

Olin Corporation is a Virginia corporation, incorporated in 1892.  We are a manufacturer concentrated in two business segments:  Chlor Alkali Products and Winchester.  Chlor Alkali Products, with nine U.S. manufacturing facilities and one Canadian manufacturing facility, produces chlorine and caustic soda, hydrochloric acid, hydrogen, bleach products and potassium hydroxide.  Winchester, with its principal manufacturing facilities in East Alton, IL and Oxford, MS, produces and distributes sporting ammunition, reloading components, small caliber military ammunition and components, and industrial cartridges.

We have prepared the condensed financial statements included herein, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (SEC).  The preparation of the consolidated 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, 2010.  Certain reclassifications were made to prior year amounts to conform to the 2011 presentation.

On February 28, 2011, we acquired PolyOne Corporation’s (PolyOne) 50% interest in the SunBelt Chlor Alkali Partnership, which we refer to as SunBelt.  Previously, we had a 50% ownership interest in SunBelt, which was accounted for using the equity method of accounting.  Accordingly, we included only our share of SunBelt results in earnings of non-consolidated affiliates.  Since the date of acquisition, SunBelt’s results are no longer included in earnings of non-consolidated affiliates but are consolidated in our accompanying financial statements.

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FAIR VALUE MEASUREMENTS (Tables)

9 Months Ended

Sep. 30, 2011

FAIR VALUE MEASUREMENTS [Abstract]

Table of financial instruments measured at fair value

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

	Fair Value Measurements
Balance at September 30, 2011	Level 1			Level 2			Level 3			Total
Assets	($ in millions)
Interest rate swaps		$	—		$	15.1		$	—	$	15.1
Liabilities
Interest rate swaps		$	—		$	15.1		$	—	$	15.1
Commodity forward contracts			4.8			9.9			—		14.7
Earn out			—			—			44.9		44.9
Balance at December 31, 2010
Assets
Interest rate swaps		$	—		$	9.1		$	—	$	9.1
Commodity forward contracts			7.0			9.9			—		16.9
Liabilities
Interest rate swaps		$	—		$	9.3		$	—	$	9.3
Commodity forward contracts			—			0.2			—		0.2
Balance at September 30, 2010
Assets
Interest rate swaps		$	—		$	15.5		$	—	$	15.5
Commodity forward contracts			4.2			6.2			—		10.4
Liabilities
Interest rate swaps		$	—		$	15.6		$	—	$	15.6
Commodity forward contracts			—			0.8			—		0.8
Foreign currency contracts			0.1			—			—		0.1

Activity summary of financial instruments measure at fair value using level 3 inputs

The following table summarizes the activity for our financial instruments measured at fair value using Level 3 inputs:

	September 30,
	2011			2010
	($ in millions)
Balance at beginning of year	$	—		$	—
Purchases, sales and settlements		(42.3	)		—
Unrealized loss included in other (expense) income		(2.6	)		—
Balance at end of period	$	(44.9	)	$	—

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ENVIRONMENTAL

9 Months Ended

Sep. 30, 2011

ENVIRONMENTAL [Abstract]

ENVIRONMENTAL

ENVIRONMENTAL

We are party to various government and private environmental actions associated with past manufacturing facilities and former waste disposal sites.  Charges to income for investigatory and remedial efforts were material to operating results in 2011 and 2010.  The condensed balance sheets included reserves for future environmental expenditures to investigate and remediate known sites amounting to $164.6 million, $167.6 million and $170.5 million at September 30, 2011, December 31, 2010 and September 30, 2010, respectively, of which $136.6 million, $139.6 million and $146.5 million, respectively, were classified as other noncurrent liabilities.

Environmental provisions charged (credited) to income, which are included in cost of goods sold, were as follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
	($ in millions)
Charges to income	$	4.0		$	8.6		$	13.9		$	14.7
Recoveries from third parties of costs incurred and expensed in prior periods		(1.5	)		(0.2	)		(11.0	)		(5.6	)
Total environmental expense	$	2.5		$	8.4		$	2.9		$	9.1

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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INCOME TAXES

9 Months Ended

Sep. 30, 2011

INCOME TAXES [Abstract]

INCOME TAXES

INCOME TAXES

The following table accounts for the difference between the actual tax provision and the amounts obtained by applying the statutory U.S. federal income tax rate of 35% to income before taxes.

	Three Months Ended September 30,						Nine Months Ended September 30,
Effective Tax Rate Reconciliation (Percent)	2011			2010			2011			2010
Statutory federal tax rate		35.0	%		35.0	%		35.0	%		35.0	%
Foreign rate differential		(0.1	)		(0.6	)		—			(0.4	)
Domestic manufacturing/export tax incentive		(1.6	)		0.8			(0.8	)		—
Dividends paid to CEOP		(0.4	)		(1.0	)		(0.2	)		(1.4	)
State income taxes, net		2.4			2.0			1.2			1.7
Change in tax contingencies		(5.2	)		(16.1	)		(1.0	)		(11.4	)
Change in valuation allowance		—			0.3			—			(1.6	)
Return to provision		2.0			(2.6	)		0.6			(1.9	)
Remeasurement of deferred taxes		—			—			(1.4	)		—
Incremental tax effect of SunBelt remeasurement		—			—			3.5			—
Other, net		(0.1	)		0.2			(0.1	)		0.7
Effective tax rate		32.0	%		18.0	%		36.8	%		20.7	%

The effective tax rates for the three months ended September 30, 2011 and 2010 included the cumulative effect of changes to our annual estimated effective tax rate from prior quarters.

The effective tax rate for the three months ended September 30, 2011 included a $1.4 million expense associated with the finalization of our 2010 domestic income tax returns.  The effective tax rate for the nine months ended September 30, 2011 included a benefit of $4.9 million related to remeasurement of deferred taxes due to an increase in state tax effective rates, a $2.1 million expense associated with the finalization of our 2010 domestic and Canadian income tax returns and a deferred tax expense of $76.0 million related to the tax effect of the gain recorded on the remeasurement of our previously held 50% equity interest in SunBelt.

The effective tax rate for the three and nine months ended September 30, 2010 included an expense of $0.1 million and a benefit of $1.3 million, respectively, related to changes in the valuation allowance recorded against the foreign tax credit carryforward deferred tax asset generated by our Canadian operations.

As of September 30, 2011, we had $38.7 million of gross unrecognized tax benefits, which would have a net $36.6 million impact on the effective tax rate, if recognized.  As of September 30, 2010, we had $42.4 million of gross unrecognized tax benefits, of which $40.1 million would have impacted the effective tax rate, if recognized.  The reduction for 2011 primarily relates to the recognition of tax benefits due to the expiration of statute of limitations in domestic jurisdictions.  The reduction included $2.1 million of tax positions associated with discontinued operations.  The amount of unrecognized tax benefits was as follows:

	September 30,
	2011			2010
	($ in millions)
Balance at beginning of year	$	41.5		$	50.8
Increases for prior year tax positions		0.2			0.2
Decreases for prior year tax positions		—			(0.3	)
Increases for current year tax positions		—			1.8
Decreases for current year tax positions		—			(0.1	)
Decreases due to settlement with taxing authorities		—			(2.2	)
Reductions due to statute of limitations		(3.0	)		(7.8	)
Balance at end of period	$	38.7		$	42.4

As of September 30, 2011, we believe it is reasonably possible that our total amount of unrecognized tax benefits will decrease by approximately $2.6 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 primarily in North America and file income tax returns in numerous jurisdictions.  Our tax returns are subject to examination by various federal, state and local tax authorities.  For our primary tax jurisdictions, the tax years that remain subject to examination are as follows:

	Tax Years
U.S. federal income tax	2007 – 2010
U.S. state income tax	2004 – 2010
Canadian federal income tax	2007 – 2010
Canadian provincial income tax	2006 – 2010

During third quarter 2010, the IRS completed an audit of our U.S. income tax return for 2006.  During second quarter 2010, the Canada Revenue Agency completed an audit of a portion of our Canadian tax returns for the 2005 to 2007 tax years.  No issues arose under either the U.S. audit or the Canadian audit that required an additional tax liability to be recognized.  We believe we have adequately provided for all tax positions; however, amounts asserted by taxing authorities could be greater than our accrued position.

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SHAREHOLDERS' EQUITY

9 Months Ended

Sep. 30, 2011

SHAREHOLDERS' EQUITY [Abstract]

SHAREHOLDERS' EQUITY

SHAREHOLDERS’ EQUITY

On July 21, 2011, our board of directors authorized a share repurchase program of up to 5 million shares of common stock that will terminate in three years for any of the remaining shares not yet repurchased.  Since the date of authorization, 0.1 million shares were purchased and retired under this program at a cost of $2.2 million.  As of September 30, 2011, we had purchased a total of 0.1 million shares under this program and 4.9 million shares remained authorized to be purchased.

We issued 0.5 million shares and 0.2 million shares representing stock options exercised for the nine months ended September 30, 2011 and 2010, respectively, with a total value of $9.3 million and $2.5 million, respectively.  In addition, we issued 0.6 million shares with a total value of $10.2 million for the nine months ended September 30, 2010, in connection with our Contributing Employee Ownership Plan (CEOP).  Effective September 23, 2010, our CEOP plan began to purchase shares in the open market in lieu of our issuing shares to satisfy the investment in our common stock resulting from employee contributions, our matching contributions, retirement contributions and re-invested dividends.  Effective February 1, 2011, we reinstated the match on all salaried and certain non-bargained hourly employees’ contributions, which had previously been suspended effective January 1, 2010.

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

	Foreign Currency Translation Adjustment			Unrealized Gains (Losses) on Derivative Contracts (net of taxes)			Pension and Postretirement Benefits (net of taxes)			Accumulated Other Comprehensive Loss
	($ in millions)
Balance at January 1, 2010	$	(0.5	)	$	11.6		$	(259.3	)	$	(248.2	)
Unrealized losses		(0.6	)		(0.8	)		—			(1.4	)
Reclassification adjustments into income		—			(4.1	)		7.4			3.3
Balance at September 30, 2010	$	(1.1	)	$	6.7		$	(251.9	)	$	(246.3	)
Balance at January 1, 2011	$	0.4		$	11.6		$	(273.8	)	$	(261.8	)
Unrealized gains (losses)		2.3			(13.0	)		—			(10.7	)
Reclassification adjustments into income		—			(7.2	)		9.1			1.9
Balance at September 30, 2011	$	2.7		$	(8.6	)	$	(264.7	)	$	(270.6	)

Pension and postretirement benefits (net of taxes) activity in other comprehensive loss included the amortization of prior service costs and actuarial losses.

Unrealized gains and losses on derivative contracts (net of taxes) activity in other comprehensive loss included a deferred tax provision (benefit) for the nine months ended September 30, 2011 and 2010 of $12.9 million and $(3.0) million, respectively.  Pension and postretirement benefits (net of taxes) activity in other comprehensive loss included a deferred tax provision for the nine months ended September 30, 2011 and 2010 of $5.9 million and $4.5 million, respectively.

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PENSION PLANS AND RETIREMENT BENEFITS (Tables)

9 Months Ended

Sep. 30, 2011

PENSION PLANS AND RETIREMENT BENEFITS [Abstract]

Components of Net Periodic Benefit (Income) Cost

We also provide certain postretirement health care (medical) and life insurance benefits for eligible active and retired domestic employees.  The health care 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,
	2011			2010			2011		2010
Components of Net Periodic Benefit (Income) Cost	($ in millions)
Service cost	$	1.6		$	1.5		$	0.2	$	0.3
Interest cost		23.4			24.4			0.7		0.8
Expected return on plans’ assets		(34.9	)		(34.6	)		—		—
Amortization of prior service cost		0.1			0.1			—		—
Recognized actuarial loss		3.8			3.3			1.0		0.5
Net periodic benefit (income) cost	$	(6.0	)	$	(5.3	)	$	1.9	$	1.6

	Pension Benefits						Other Postretirement Benefits
	Nine Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
Components of Net Periodic Benefit (Income) Cost	($ in millions)
Service cost	$	4.8		$	4.5		$	0.9		$	1.0
Interest cost		70.6			73.9			2.6			2.8
Expected return on plans’ assets		(104.7	)		(103.9	)		—			—
Amortization of prior service cost		0.3			0.4			(0.1	)		(0.1	)
Recognized actuarial loss		11.3			9.7			2.4			1.9
Curtailment		1.1			—			—			—
Net periodic benefit (income) cost	$	(16.6	)	$	(15.4	)	$	5.8		$	5.6

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EARNINGS PER SHARE

9 Months Ended

Sep. 30, 2011

EARNINGS PER SHARE [Abstract]

EARNINGS PER SHARE

EARNINGS PER SHARE

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
Computation of Income per Share	($ and shares in millions, except per share data)
Net income	$	47.2	$	31.8	$	223.0	$	62.8
Basic shares		80.2		79.4		79.9		79.1
Basic net income per share	$	0.59	$	0.40	$	2.79	$	0.79
Diluted shares:
Basic shares		80.2		79.4		79.9		79.1
Stock-based compensation		0.6		0.8		0.9		0.7
Diluted shares		80.8		80.2		80.8		79.8
Diluted net income per share	$	0.58	$	0.40	$	2.76	$	0.79

The computation of dilutive shares from stock-based compensation does not include 1.7 million shares and 1.3 million shares for the three months ended September 30, 2011 and September 30, 2010, respectively, and 0.9 million shares and 1.3 million shares for the nine months ended September 30, 2011 and 2010, respectively, as their effect would have been anti-dilutive.

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Condensed Statements of Shareholders' Equity Parenthetical (USD $)	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Condensed Statements of Shareholders' Equity Parenthetical [Abstract]
Common stock, per share	$ 0.60	$ 0.60

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ACQUISITION

9 Months Ended

Sep. 30, 2011

ACQUISITION [Abstract]

ACQUISITION

ACQUISITION

On February 28, 2011, we acquired PolyOne’s 50% interest in SunBelt for $132.3 million in cash plus the assumption of a PolyOne guarantee related to the SunBelt Notes.  With this acquisition, Olin now owns 100% of SunBelt.  The SunBelt chlor alkali plant, which is located within our McIntosh, AL facility, has approximately 350,000 tons of membrane technology capacity.  We also agreed to a three year earn out, which has no guaranteed minimum or maximum, based on the performance of SunBelt.  In addition, during the second quarter of 2011, we remitted to PolyOne $6.0 million, which represented 50% of distributable cash generated by SunBelt from January 1, 2011 through February 28, 2011.

Pursuant to a note purchase agreement dated December 22, 1997, SunBelt sold $97.5 million of Guaranteed Senior Secured Notes due 2017, Series O, and $97.5 million of Guaranteed Senior Secured Notes due 2017, Series G.  We refer to these notes as the SunBelt Notes.  The SunBelt Notes bear interest at a rate of 7.23% per annum, payable semi-annually in arrears on each June 22 and December 22.  Beginning on December 22, 2002 and each year through 2017, SunBelt is required to repay $12.2 million of the SunBelt Notes, of which $6.1 million is attributable to the Series O Notes and of which $6.1 million is attributable to the Series G Notes.  In conjunction with the acquisition, we consolidated the SunBelt Notes with a remaining principal balance of $85.3 million.

We have guaranteed the Series O Notes, and PolyOne, our former SunBelt partner, has guaranteed the Series G Notes, in both cases pursuant to customary guaranty agreements.  We have agreed to indemnify PolyOne for any payments or other costs under the guarantee in favor of the purchasers of the Series G Notes, to the extent any payments or other costs arise from a default or other breach under the SunBelt Notes.  If SunBelt does not make timely payments on the SunBelt Notes, whether as a result of a failure to pay on a guarantee or otherwise, the holders of the SunBelt Notes may proceed against the assets of SunBelt for repayment.

From January 1, 2011 to February 28, 2011, we recorded $6.3 million of equity earnings of non-consolidated affiliates for our 50% ownership in SunBelt.  The value of our investment in SunBelt was $(0.8) million.  We remeasured our equity interest in SunBelt to fair value upon the close of the transaction.  As a result, we recognized a pretax gain of $181.4 million, which was classified in other (expense) income in our condensed statement of income.  In conjunction with this remeasurement, a discrete deferred tax expense of $76.0 million was recorded.

The transaction has been accounted for using the acquisition method of accounting which requires, among other things, that assets acquired and liabilities assumed be recognized at their fair values as of the acquisition date.  We finalized our purchase price allocation during the second quarter of 2011.  The adjustments to the purchase price allocation from March 31, 2011 were primarily the result of finalizing estimates for intangible assets and goodwill.  The following table summarizes the final allocation of the purchase price to SunBelt’s assets and liabilities:

	February 28, 2011
	($ in millions)
Total current assets	$	37.6
Property, plant and equipment		87.4
Deferred income taxes		0.4
Other assets		5.8
Total assets acquired		131.2
Total current liabilities		42.7
Long-term debt		75.1
Other liabilities		27.6
Total liabilities assumed		145.4
Less:  Investment in SunBelt		(0.8	)
Net liabilities assumed		(13.4	)
Liabilities for uncertainties		48.3
Gain on remeasurement of investment in SunBelt		(181.4	)
Goodwill		327.1
Fair value of assets acquired	$	180.6

Included in total current assets are cash and cash equivalents of $8.9 million.  Included in total current liabilities is $12.2 million of current installments of long-term debt.

Based on final valuations, we allocated $5.8 million of the purchase price to intangible assets relating to customers, customer contracts and relationships, which management estimates to have a useful life of fifteen years.  These identifiable intangible assets were included in other assets.  Based on final valuations, $327.1 million was assigned to goodwill.  The preliminary value assigned to goodwill as of March 31, 2011 was $327.9 million.  For tax purposes, $163.7 million of the goodwill is deductible.  The goodwill represents the remeasurement of our previously held 50% equity interest in SunBelt and the benefits of the acquisition that are in addition to the fair values of the other net assets acquired.  The primary reason for the acquisition and the principal factors that contributed to a SunBelt purchase price that resulted in the recognition of goodwill is the cost savings available from operating the business under a single owner and our ability to fully utilize SunBelt’s low cost membrane capacity in lieu of higher cost diaphragm capacity.  The cost saving opportunities include operational efficiencies in logistics, purchasing and manufacturing.

Goodwill recorded in the acquisition is not amortized but will be reviewed for impairment annually in the fourth quarter and/or when circumstances or other events indicate that impairment may have occurred.

For segment reporting purposes, SunBelt has been included in Chlor Alkali Products.  The SunBelt results of operations have been included in our consolidated results for the period subsequent to the effective date of the acquisition.  Our consolidated results for the three months ended September 30, 2011 included $58.9 million of SunBelt sales and $11.7 million of additional SunBelt pretax income ($14.4 million included in Chlor Alkali Products segment income; less $1.0 million of interest expense and $1.7 million of expense for our earn out liability).  Our consolidated results for the nine months ended September 30, 2011 included $125.0 million of SunBelt sales and $23.2 million of additional SunBelt pretax income ($29.4 million included in Chlor Alkali Products segment income; less $0.8 million of acquisition costs, $2.8 million of interest expense and $2.6 million of expense for our earn out liability) on the 50% interest we acquired.  The following pro forma summary presents the condensed statements of income as if the acquisition of SunBelt had occurred on January 1, 2010.

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2010		2011		2010
	($ in millions, except per share data)
Sales	$	484.4	$	1,541.6	$	1,321.1
Net income		44.9		121.9		86.4
Net income per common share:
Basic	$	0.57	$	1.53	$	1.09
Diluted	$	0.56	$	1.51	$	1.08

The pro forma statements of income were prepared based on historical financial information and have been adjusted to give effect to pro forma adjustments that are (i) directly attributable to the transaction, (ii) factually supportable and (iii) expected to have a continuing impact on the combined results.  The pro forma statements of income use estimates and assumptions based on information available at the time.  Management believes the estimates and assumptions to be reasonable; however, actual results may differ significantly from this pro forma financial information.  The pro forma information does not reflect any cost savings that might be achieved from operating the business under a single owner and is not intended to reflect the actual results that would have occurred had the companies actually been combined during the periods presented.  The pro forma data reflect the application of the following adjustments:

·   Elimination of the pretax gain resulting from the remeasurement of our previously held 50% equity interest in SunBelt, which is considered non-recurring ($181.4 million for the nine months ended September 30, 2011).

·   Additional amortization expense related to the fair value of acquired identifiable intangible assets ($0.1 million for the three months ended September 30, 2010, and $0.1 million and $0.3 million for the nine months ended September 30, 2011 and 2010, respectively).

·   Reduction of depreciation expense related to the fair value adjustment to property, plant and equipment ($1.4 million for the three months ended September 30, 2010, and $1.0 million and $4.3 million for the nine months ended September 30, 2011 and 2010, respectively).

·   Reduction in interest expense as a result of increasing the carrying value of acquired debt obligations to its estimated fair value ($0.2 million for the three months ended September 30, 2010, and $0.1 million and $0.4 million for the nine months ended September 30, 2011 and 2010, respectively).

·   Additional accretion expense for the earn out liability that was recorded as a result of the acquisition ($0.6 million for the three months ended September 30, 2010, and $0.4 million and $1.9 million for the nine months ended September 30, 2011 and 2010, respectively).

·   Elimination of transaction costs incurred in 2011 that are directly related to the transaction, and do not have a continuing impact on our combined operating results ($0.8 million for the nine months ended September 30, 2011).

In addition, the pro forma data reflect the tax effect of all of the above adjustments.  The pro forma tax provision for the nine months ended September 30, 2011 reflects a reduction of $76.0 million related to the elimination of the gain resulting from the remeasurement of our previously held 50% equity interest in SunBelt.  The pro forma tax provision reflects an increase of $3.4 million for the three months ended September 30, 2010, and $2.3 million and $6.1 million for the nine months ended September 30, 2011 and 2010, respectively, associated with the incremental pretax income and the fair value adjustments for acquired intangible assets, property, plant and equipment and the SunBelt Notes, which reflects the marginal tax of the adjustments in the various jurisdictions where such adjustments occurred.

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INVENTORIES (Details) (USD $) In Millions	Sep. 30, 2011	Feb. 28, 2011	Dec. 31, 2010	Sep. 30, 2010
INVENTORIES [Abstract]
Supplies	$ 32.8		$ 30.8	$ 29.3
Raw materials	69.8		56.5	59.8
Work in process	32.4		24.7	27.8
Finished goods	104.9		104.4	103.3
Inventory, gross	239.9		216.4	220.2
LIFO reserve	(73.6)		(60.8)	(62.9)
Inventories, net	166.3		155.6	157.3
Inventories obtained through acquisition at fair value		$ 4.0

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STOCK-BASED COMPENSATION (Tables)

9 Months Ended

Sep. 30, 2011

STOCK-BASED COMPENSATION [Abstract]

Stock-based compensation expense

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

	Three Months Ended September 30,					Nine Months Ended September 30,
	2011			2010		2011			2010
	($ in millions)
Stock-based compensation	$	1.9		$	2.2	$	6.7		$	7.9
Mark-to-market adjustments		(2.0	)		0.9		(1.2	)		1.1
Total (income) expense	$	(0.1	)	$	3.1	$	5.5		$	9.0

Schedule of fair value of stock options granted

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	2011			2010
Dividend yield		4.32	%		4.32	%
Risk-free interest rate		3.05	%		3.00	%
Expected volatility		42	%		42	%
Expected life (years)		7.0			7.0
Grant fair value (per option)	$	5.48		$	4.61
Exercise price	$	18.78		$	15.68
Shares granted		575,000			803,750

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RESTRUCTURING CHARGE

9 Months Ended

Sep. 30, 2011

RESTRUCTURING CHARGE [Abstract]

RESTRUCTURING CHARGE

RESTRUCTURING CHARGES

On December 9, 2010, our board of directors approved a plan to convert the 260,000 tons of mercury cell capacity at our Charleston, TN facility to 200,000 tons of membrane capacity capable of producing both potassium hydroxide and caustic soda.  The project has an estimated capital cost of approximately $160 million.  The board of directors also approved plans to reconfigure our Augusta, GA facility to manufacture bleach and distribute caustic soda, while discontinuing chlor alkali manufacturing at this site.  This action will reduce our chlor alkali manufacturing capacity by 100,000 tons.  We based our decision to convert and reconfigure on several factors.  First, during 2009 and 2010 we had experienced a steady increase in the number of customers unwilling to accept our products manufactured using mercury cell technology.  Second, there was federal legislation that was passed in 2008 governing the treatment of mercury that significantly limits our recycling options after December 31, 2012.  We concluded that exiting mercury cell technology production after 2012 represented an unacceptable future cost risk.  Further, the conversion of the Charleston, TN plant to membrane technology will reduce the electricity usage per ECU produced by approximately 25% and the configuration of the new plant will result in an increase in our capacity to produce potassium hydroxide.  The decision to reconfigure the Augusta, GA facility to manufacture bleach and distribute caustic soda removes the highest cost production capacity from our system.  We currently expect to complete the conversion and reconfiguration by the end of 2012.  We recorded a pretax restructuring charge of $28.0 million associated with these actions in the fourth quarter of 2010.  The restructuring charge included write-off of equipment and facility costs of $17.5 million, acceleration of asset retirement obligations of $6.7 million, employee severance and related benefit costs of $2.8 million and lease and other contract termination costs of $1.0 million.  For the three and nine months ended September 30, 2011, we recorded pretax restructuring charges of $2.0 million and $2.3 million, respectively, for employee severance and related benefit costs and facility exit costs.  We expect to incur additional restructuring charges through 2014 of approximately $8 million related to the implementation of plans to exit the use of mercury cell technology in the chlor alkali manufacturing process.

On November 3, 2010, we announced that we made the decision to relocate the Winchester centerfire ammunition operations from East Alton, IL to Oxford, MS.  This relocation, when completed, is forecast to reduce Winchester’s annual operating costs by approximately $30 million.  Consistent with this decision we have initiated an estimated $110 million five-year project, which includes approximately $80 million of capital spending.  The State of Mississippi and local governments have provided incentives which should offset approximately 40 percent of the capital spending.  We recorded a pretax restructuring charge of $6.2 million associated with these actions in the fourth quarter of 2010.  The restructuring charge included employee severance and related benefit costs of $3.2 million and a non-cash pension and other postretirement benefits curtailment charge of $3.0 million.  For the three and nine months ended September 30, 2011, we recorded additional pretax restructuring charges of $2.1 million and $4.3 million, respectively, for employee severance and related benefits costs, a non-cash pension curtailment charge, employee relocation costs and facility exit costs.  These restructuring charges related primarily to the second quarter 2011 ratification of a new five and one half year Winchester, East Alton, IL union labor agreement.  We expect to incur additional restructuring charges through 2016 of approximately $18 million related to the transfer of these operations.

The following table summarizes the 2011 activity by major component of these restructuring actions and the remaining balances of accrued restructuring costs as of September 30, 2011:

	Employee severance and job related benefits			Pension and other postretirement benefits curtailment			Lease and other contract termination costs			Employee relocation costs			Facility exit costs			Total
	($ in millions)
Balance at January 1, 2011	$	6.0		$	—		$	1.0		$	—		$	—		$	7.0
2011 restructuring charges		3.7			1.1			—			1.3			0.5			6.6
Amounts utilized		(0.2	)		(1.1	)		(0.2	)		(1.3	)		(0.5	)		(3.3	)
Balance at September 30, 2011	$	9.5		$	—		$	0.8		$	—		$	—		$	10.3

As of September 30, 2011, we have incurred cash expenditures of $2.2 million related to these restructuring actions.  The majority of the remaining balance of $10.3 million is expected to be paid out in 2012 through 2016.

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ENVIRONMENTAL (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
ENVIRONMENTAL [Abstract]
Reserves for future environmental expenditures-total	$ 164.6	$ 170.5	$ 164.6	$ 170.5	$ 167.6
Reserves for environmental expenditures-noncurrent	136.6	146.5	136.6	146.5	139.6
Environment provisions charged (credited) to income [Abstract]
Charges to income	4.0	8.6	13.9	14.7
Recoveries from third parties of costs incurred and expensed in prior periods	(1.5)	(0.2)	(11.0)	(5.6)
Total environmental expense	$ 2.5	$ 8.4	$ 2.9	$ 9.1

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ENVIRONMENTAL (Tables)

9 Months Ended

Sep. 30, 2011

ENVIRONMENTAL [Abstract]

Environmental Provisions Charged (Credited) to Income Table

Environmental provisions charged (credited) to income, which are included in cost of goods sold, were as follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
	($ in millions)
Charges to income	$	4.0		$	8.6		$	13.9		$	14.7
Recoveries from third parties of costs incurred and expensed in prior periods		(1.5	)		(0.2	)		(11.0	)		(5.6	)
Total environmental expense	$	2.5		$	8.4		$	2.9		$	9.1

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INCOME TAXES (Tables)

9 Months Ended

Sep. 30, 2011

INCOME TAXES [Abstract]

Effective Tax Rate Reconciliation (Percent)

The following table accounts for the difference between the actual tax provision and the amounts obtained by applying the statutory U.S. federal income tax rate of 35% to income before taxes.

	Three Months Ended September 30,						Nine Months Ended September 30,
Effective Tax Rate Reconciliation (Percent)	2011			2010			2011			2010
Statutory federal tax rate		35.0	%		35.0	%		35.0	%		35.0	%
Foreign rate differential		(0.1	)		(0.6	)		—			(0.4	)
Domestic manufacturing/export tax incentive		(1.6	)		0.8			(0.8	)		—
Dividends paid to CEOP		(0.4	)		(1.0	)		(0.2	)		(1.4	)
State income taxes, net		2.4			2.0			1.2			1.7
Change in tax contingencies		(5.2	)		(16.1	)		(1.0	)		(11.4	)
Change in valuation allowance		—			0.3			—			(1.6	)
Return to provision		2.0			(2.6	)		0.6			(1.9	)
Remeasurement of deferred taxes		—			—			(1.4	)		—
Incremental tax effect of SunBelt remeasurement		—			—			3.5			—
Other, net		(0.1	)		0.2			(0.1	)		0.7
Effective tax rate		32.0	%		18.0	%		36.8	%		20.7	%

Unrecognized Tax Benefits

As of September 30, 2011, we had $38.7 million of gross unrecognized tax benefits, which would have a net $36.6 million impact on the effective tax rate, if recognized.  As of September 30, 2010, we had $42.4 million of gross unrecognized tax benefits, of which $40.1 million would have impacted the effective tax rate, if recognized.  The reduction for 2011 primarily relates to the recognition of tax benefits due to the expiration of statute of limitations in domestic jurisdictions.  The reduction included $2.1 million of tax positions associated with discontinued operations.  The amount of unrecognized tax benefits was as follows:

	September 30,
	2011			2010
	($ in millions)
Balance at beginning of year	$	41.5		$	50.8
Increases for prior year tax positions		0.2			0.2
Decreases for prior year tax positions		—			(0.3	)
Increases for current year tax positions		—			1.8
Decreases for current year tax positions		—			(0.1	)
Decreases due to settlement with taxing authorities		—			(2.2	)
Reductions due to statute of limitations		(3.0	)		(7.8	)
Balance at end of period	$	38.7		$	42.4

Tax Returns Subject to Examination

We operate primarily in North America and file income tax returns in numerous jurisdictions.  Our tax returns are subject to examination by various federal, state and local tax authorities.  For our primary tax jurisdictions, the tax years that remain subject to examination are as follows:

	Tax Years
U.S. federal income tax	2007 – 2010
U.S. state income tax	2004 – 2010
Canadian federal income tax	2007 – 2010
Canadian provincial income tax	2006 – 2010

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EARNINGS PER SHARE (Details) (USD $) In Millions, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Computation of Basic Income per Share [Abstract]
Net income	$ 47.2	$ 31.8	$ 223.0	$ 62.8
Basic shares (in shares)	80.2	79.4	79.9	79.1
Basic net income per share (in dollars per share)	$ 0.59	$ 0.40	$ 2.79	$ 0.79
Computation of Diluted Income per Share [Abstract]
Basic shares (in shares)	80.2	79.4	79.9	79.1
Stock-based compensation (in shares)	0.6	0.8	0.9	0.7
Diluted shares (in shares)	80.8	80.2	80.8	79.8
Diluted net income per share (in dollars per share)	$ 0.58	$ 0.40	$ 2.76	$ 0.79
Antidilutive shares excluded from the computation of earnings per share (in shares)	1.7	1.3	0.9	1.3

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SEGMENT INFORMATION (Tables)

9 Months Ended

Sep. 30, 2011

SEGMENT INFORMATION [Abstract]

Segment Information

We define segment results as income before interest expense, interest income, other operating income, other (expense) income and income taxes, and include the operating results of non-consolidated affiliates.

	Three Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
Sales:	($ in millions)
Chlor Alkali Products	$	386.1		$	275.3		$	1,065.8		$	763.9
Winchester		164.1			157.5			449.5			436.6
Total sales	$	550.2		$	432.8		$	1,515.3		$	1,200.5
Income before taxes:
Chlor Alkali Products	$	76.7		$	44.0		$	194.7		$	80.7
Winchester		13.1			18.8			37.4			59.4
Corporate/other:
Pension income		6.9			7.0			20.8			18.2
Environmental expense		(2.5	)		(8.4	)		(2.9	)		(9.1	)
Other corporate and unallocated costs		(15.7	)		(16.8	)		(53.6	)		(53.9	)
Restructuring charges		(4.1	)		—			(6.6	)		—
Other operating income		4.3			0.3			5.9			2.6
Interest expense		(7.9	)		(6.4	)		(22.5	)		(19.5	)
Interest income		0.2			0.3			0.7			0.7
Other (expense) income		(1.6	)		—			179.0			0.1
Income before taxes	$	69.4		$	38.8		$	352.9		$	79.2

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PENSION PLANS AND RETIREMENT BENEFITS

9 Months Ended

Sep. 30, 2011

PENSION PLANS AND RETIREMENT BENEFITS [Abstract]

PENSION PLANS AND RETIREMENT BENEFITS

PENSION PLANS AND RETIREMENT BENEFITS

Most of our employees participate in defined contribution pension plans.  We provide a contribution to an individual retirement contribution account maintained with the CEOP primarily equal to 5% of the employee’s eligible compensation if such employee is less than age 45, and 7.5% of the employee’s eligible compensation if such employee is age 45 or older.  The defined contribution pension plans expense was $3.5 million and $3.3 million for the three months ended September 30, 2011 and 2010, respectively, and $10.9 million and $10.5 million for the nine months ended September 30, 2011 and 2010, respectively.

A portion of our bargaining hourly employees continue to participate in our domestic defined benefit pension plans under a flat-benefit formula.  Our funding policy for the 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 statutory practices.  Our 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 health care (medical) and life insurance benefits for eligible active and retired domestic employees.  The health care 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,
	2011			2010			2011		2010
Components of Net Periodic Benefit (Income) Cost	($ in millions)
Service cost	$	1.6		$	1.5		$	0.2	$	0.3
Interest cost		23.4			24.4			0.7		0.8
Expected return on plans’ assets		(34.9	)		(34.6	)		—		—
Amortization of prior service cost		0.1			0.1			—		—
Recognized actuarial loss		3.8			3.3			1.0		0.5
Net periodic benefit (income) cost	$	(6.0	)	$	(5.3	)	$	1.9	$	1.6

	Pension Benefits						Other Postretirement Benefits
	Nine Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
Components of Net Periodic Benefit (Income) Cost	($ in millions)
Service cost	$	4.8		$	4.5		$	0.9		$	1.0
Interest cost		70.6			73.9			2.6			2.8
Expected return on plans’ assets		(104.7	)		(103.9	)		—			—
Amortization of prior service cost		0.3			0.4			(0.1	)		(0.1	)
Recognized actuarial loss		11.3			9.7			2.4			1.9
Curtailment		1.1			—			—			—
Net periodic benefit (income) cost	$	(16.6	)	$	(15.4	)	$	5.8		$	5.6

We made cash contributions to our Canadian qualified defined benefit pension plan of $0.7 million and $7.3 million for the nine months ended September 30, 2011 and 2010, respectively.  In June 2011, we recorded a curtailment charge of $1.1 million related to the ratification of a new five and one half year Winchester, East Alton, IL union labor agreement.  This curtailment charge was included in restructuring charges for the nine months ended September 30, 2011.

In March 2010, we recorded a charge of $1.3 million associated with an agreement to withdraw our Henderson, NV chlor alkali hourly workforce from a multi-employer defined benefit pension plan.

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ALLOWANCE FOR DOUBTFUL ACCOUNTS RECEIVABLES

9 Months Ended

Sep. 30, 2011

Accounts Receivable, Net [Abstract]

ALLOWANCE FOR DOUBTFUL ACCOUNTS RECEIVABLES

ALLOWANCE FOR DOUBTFUL ACCOUNTS RECEIVABLES

We evaluate the collectibility of accounts receivable based on a combination of factors.  We estimate an allowance for doubtful accounts as a percentage of net sales based on historical bad debt experience.  This estimate is periodically adjusted when we become aware of a specific customer's inability to meet its financial obligations (e.g., bankruptcy filing) or as a result of changes in the overall aging of accounts receivable.  While we have a large number of customers that operate in diverse businesses and are geographically dispersed, a general economic downturn in any of the industry segments in which we operate could result in higher than expected defaults, and, therefore, the need to revise estimates for the provision for doubtful accounts could occur.

Allowance for doubtful accounts receivable consisted of the following:

	September 30,
	2011			2010
	($ in millions)
Balance at beginning of year	$	4.8		$	3.3
Provisions charged		0.8			0.2
(Write-offs) recoveries, net		(1.7	)		0.1
Balance at end of period	$	3.9		$	3.6

Provisions charged (credited) to operations were $0.6 million and $(0.6) million for the three months ended September 30, 2011 and 2010, respectively.

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FAIR VALUE MEASUREMENTS

9 Months Ended

Sep. 30, 2011

FAIR VALUE MEASUREMENTS [Abstract]

FAIR VALUE MEASUREMENTS

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) and directly related to the amount of subjectivity associated with the inputs to fair valuation of these assets and liabilities, 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.

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 financial assets and liabilities measured at fair value in the condensed balance sheets:

	Fair Value Measurements
Balance at September 30, 2011	Level 1			Level 2			Level 3			Total
Assets	($ in millions)
Interest rate swaps		$	—		$	15.1		$	—	$	15.1
Liabilities
Interest rate swaps		$	—		$	15.1		$	—	$	15.1
Commodity forward contracts			4.8			9.9			—		14.7
Earn out			—			—			44.9		44.9
Balance at December 31, 2010
Assets
Interest rate swaps		$	—		$	9.1		$	—	$	9.1
Commodity forward contracts			7.0			9.9			—		16.9
Liabilities
Interest rate swaps		$	—		$	9.3		$	—	$	9.3
Commodity forward contracts			—			0.2			—		0.2
Balance at September 30, 2010
Assets
Interest rate swaps		$	—		$	15.5		$	—	$	15.5
Commodity forward contracts			4.2			6.2			—		10.4
Liabilities
Interest rate swaps		$	—		$	15.6		$	—	$	15.6
Commodity forward contracts			—			0.8			—		0.8
Foreign currency contracts			0.1			—			—		0.1

For the nine months ended September 30, 2011, there were no transfers into or out of Level 1 and Level 2.

The following table summarizes the activity for our financial instruments measured at fair value using Level 3 inputs:

	September 30,
	2011			2010
	($ in millions)
Balance at beginning of year	$	—		$	—
Purchases, sales and settlements		(42.3	)		—
Unrealized loss included in other (expense) income		(2.6	)		—
Balance at end of period	$	(44.9	)	$	—

Interest Rate Swaps

The fair value of the interest rate swaps was included in other current assets, other assets, current installments of long-term debt, accrued liabilities, long-term debt and other liabilities as of September 30, 2011, December 31, 2010 and September 30, 2010.  These financial instruments were valued using the “income approach” valuation technique.  This method used valuation techniques to convert future amounts to a single present amount.  The measurement was based on the value indicated by current market expectations about those future amounts.  We use interest rate swaps as a means of managing interest expense and floating interest rate exposure to optimal levels.

Commodity Forward Contracts

The fair value of the commodity forward contracts was classified in other current assets and accrued liabilities as of September 30, 2011, December 31, 2010 and September 30, 2010, with unrealized gains and losses included in accumulated other comprehensive loss, net of applicable taxes.  These 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 forward contracts for certain raw materials and energy costs such as copper, zinc, lead, electricity and natural gas to provide a measure of stability in managing our exposure to price fluctuations.

Foreign Currency Contracts

The fair value of the foreign currency contracts was classified in accrued liabilities as of September 30, 2010, with gains and losses included in selling and administration expense, as these financial instruments do not meet the criteria to qualify for hedge accounting.  We did not have any foreign currency contracts as of September 30, 2011 and December 31, 2010.  These 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 foreign currencies.  We enter into forward sales and purchase contracts to manage currency risk resulting from purchase and sale commitments denominated in foreign currencies (principally Canadian dollar and Euro).

Financial Instruments

The carrying values of cash and cash equivalents, restricted cash, accounts receivable and accounts payable approximated fair values due to the short-term maturities of these instruments.  The fair value of our long-term debt was determined based on current market rates for debt of similar risk and maturities.  As of September 30, 2011, December 31, 2010 and September 30, 2010, the estimated fair value of debt was $610.9 million, $530.3 million and $420.3 million, respectively, which compares to debt recorded on the condensed balance sheets of $589.6 million, $496.0 million and $386.9 million, respectively.

Earn Out

The fair value of the earn out associated with the SunBelt acquisition was estimated using a probability-weighted discounted cash flow model.  This fair value measurement is based on significant inputs not observed in the market.  Key assumptions in determining the fair value of the earn out include the discount rate and cash flow projections for the years ended December 31, 2011, 2012 and 2013.

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 measured at fair value on a nonrecurring basis as of September 30, 2011 and 2010.  At February 28, 2011, $180.6 million of assets were measured at fair value on a nonrecurring basis.  We recognized a gain of $181.4 million for the nine months ended September 30, 2011 on our previously held investment in SunBelt, which had been accounted for under the equity method of accounting prior to the acquisition.  We remeasured our equity interest in SunBelt based on our purchase of PolyOne’s 50% interest in SunBelt.  We used Level 1 inputs for the cash payments and Level 3 inputs for the estimated earn out.

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ALLOWANCE FOR DOUBTFUL ACCOUNTS RECEIVABLES (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of year			$ 4.8	$ 3.3
Provisions charged (credited)	0.6	(0.6)	0.8	0.2
(Write-offs) recoveries, net			(1.7)	0.1
Balance at end of period	$ 3.9	$ 3.6	$ 3.9	$ 3.6

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SHAREHOLDERS' EQUITY (Tables)

9 Months Ended

Sep. 30, 2011

SHAREHOLDERS' EQUITY [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			Unrealized Gains (Losses) on Derivative Contracts (net of taxes)			Pension and Postretirement Benefits (net of taxes)			Accumulated Other Comprehensive Loss
	($ in millions)
Balance at January 1, 2010	$	(0.5	)	$	11.6		$	(259.3	)	$	(248.2	)
Unrealized losses		(0.6	)		(0.8	)		—			(1.4	)
Reclassification adjustments into income		—			(4.1	)		7.4			3.3
Balance at September 30, 2010	$	(1.1	)	$	6.7		$	(251.9	)	$	(246.3	)
Balance at January 1, 2011	$	0.4		$	11.6		$	(273.8	)	$	(261.8	)
Unrealized gains (losses)		2.3			(13.0	)		—			(10.7	)
Reclassification adjustments into income		—			(7.2	)		9.1			1.9
Balance at September 30, 2011	$	2.7		$	(8.6	)	$	(264.7	)	$	(270.6	)

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Condensed Statements of Shareholders' Equity (USD $) In Millions	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings (Accumulated Deficit) [Member]	Total
Balance at Dec. 31, 2009	$ 78.7	$ 823.1	$ (248.2)	$ 168.7	$ 822.3
Balance (in shares) at Dec. 31, 2009	78.7
Comprehensive income:
Net income	0	0	0	62.8	62.8
Translation adjustment	0	0	(0.6)	0	(0.6)
Net unrealized loss	0	0	(4.9)	0	(4.9)
Amortization of prior service costs and actuarial losses, net	0	0	7.4	0	7.4
Comprehensive income					64.7
Dividends paid:
Common stock ($0.60 per share)	0	0	0	(47.5)	(47.5)
Common stock issued for:
Stock options exercised	0.2	2.3	0	0	2.5
Stock options exercised (in shares)	0.2				0.2
Employee benefit plans	0.6	9.6	0	0	10.2
Employee benefit plans (in shares)	0.6
Other transactions	0.1	2.2	0	0	2.3
Other transactions (in shares)	0.1
Stock-based compensation	0	2.9	0	0	2.9
Balance at Sep. 30, 2010	79.6	840.1	(246.3)	184.0	857.4
Balance (in shares) at Sep. 30, 2010	79.6
Balance at Dec. 31, 2010	79.6	842.3	(261.8)	170.2	830.3
Balance (in shares) at Dec. 31, 2010	79.6
Comprehensive income:
Net income	0	0	0	223.0	223.0
Translation adjustment	0	0	2.3	0	2.3
Net unrealized loss	0	0	(20.2)	0	(20.2)
Amortization of prior service costs and actuarial losses, net	0	0	9.1	0	9.1
Comprehensive income					214.2
Dividends paid:
Common stock ($0.60 per share)	0	0	0	(48.0)	(48.0)
Common stock repurchased and retired	(0.1)	(2.1)	0	0	(2.2)
Common stock repurchased and retired (in shares)	(0.1)				(0.1)
Common stock issued for:
Stock options exercised	0.5	8.8	0	0	9.3
Stock options exercised (in shares)	0.5				0.5
Other transactions	0.2	3.6	0	0	3.8
Other transactions (in shares)	0.2
Stock-based compensation	0	(0.2)	0	0	(0.2)
Balance at Sep. 30, 2011	$ 80.2	$ 852.4	$ (270.6)	$ 345.2	$ 1,007.2
Balance (in shares) at Sep. 30, 2011	80.2

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COMMITMENTS AND CONTINGENCIES

9 Months Ended

Sep. 30, 2011

COMMITMENTS AND CONTINGENCIES [Abstract]

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES

We, and our subsidiaries, are defendants in various legal actions (including proceedings based on alleged exposures to asbestos) incidental to our past and current business activities.  As of September 30, 2011, December 31, 2010 and September 30, 2010, our condensed balance sheets included liabilities for these legal actions of $16.1 million, $18.1 million and $18.9 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 legal actions will materially adversely affect our financial position or results of operations in the near term.

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 Accounting Standards Codification (ASC) 450 “Contingencies” (ASC 450) and therefore do not record gain contingencies and recognize income until it is earned and realizable.

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SEGMENT INFORMATION (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Segment Reporting Information [Line Items]
Total sales	$ 550.2	$ 432.8	$ 1,515.3	$ 1,200.5
Income before taxes [Abstract]
Income before taxes	69.4	38.8	352.9	79.2
Total environmental expense	2.5	8.4	2.9	9.1
Restructuring charges	(4.1)	0	(6.6)	0
Other operating income	4.3	0.3	5.9	2.6
Interest expense	(7.9)	(6.4)	(22.5)	(19.5)
Interest income	0.2	0.3	0.7	0.7
Other (expense) income	(1.6)	0	179.0	0.1
Chlor Alkali Products [Member]
Segment Reporting Information [Line Items]
Total sales	386.1	275.3	1,065.8	763.9
Income before taxes [Abstract]
Income before taxes	76.7	44.0	194.7	80.7
Winchester [Member]
Segment Reporting Information [Line Items]
Total sales	164.1	157.5	449.5	436.6
Income before taxes [Abstract]
Income before taxes	13.1	18.8	37.4	59.4
Corporate/Other [Member]
Income before taxes [Abstract]
Total environmental expense	(2.5)	(8.4)	(2.9)	(9.1)
Pension income	6.9	7.0	20.8	18.2
Other corporate and unallocated costs	(15.7)	(16.8)	(53.6)	(53.9)
Restructuring charges	$ (4.1)	$ 0	$ (6.6)	$ 0

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RESTRUCTURING CHARGE (Tables)

9 Months Ended

Sep. 30, 2011

RESTRUCTURING CHARGE [Abstract]

Schedule of major components of the restructuring actions

The following table summarizes the 2011 activity by major component of these restructuring actions and the remaining balances of accrued restructuring costs as of September 30, 2011:

	Employee severance and job related benefits			Pension and other postretirement benefits curtailment			Lease and other contract termination costs			Employee relocation costs			Facility exit costs			Total
	($ in millions)
Balance at January 1, 2011	$	6.0		$	—		$	1.0		$	—		$	—		$	7.0
2011 restructuring charges		3.7			1.1			—			1.3			0.5			6.6
Amounts utilized		(0.2	)		(1.1	)		(0.2	)		(1.3	)		(0.5	)		(3.3	)
Balance at September 30, 2011	$	9.5		$	—		$	0.8		$	—		$	—		$	10.3

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Condensed Statements of Cash Flows (USD $) In Millions	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Operating Activities
Net income	$ 223.0	$ 62.8
Adjustments to reconcile net income to net cash and cash equivalents provided by (used for) operating activities:
Gain on remeasurement of investment in SunBelt	(181.4)	0
Earnings of non-consolidated affiliates	(8.5)	(22.8)
Other operating income - gains on disposition of property, plant and equipment	(4.8)	(1.5)
Stock-based compensation	4.3	5.1
Depreciation and amortization	74.1	64.8
Deferred income taxes	93.1	22.1
Qualified pension plan contributions	(0.7)	(7.3)
Qualified pension plan income	(19.5)	(18.4)
Common stock issued under employee benefit plans	0	1.0
Change in assets and liabilities:
Receivables	(79.6)	(47.8)
Income taxes receivable	3.5	6.9
Inventories	(6.7)	(33.5)
Other current assets	0.3	0.1
Accounts payable and accrued liabilities	11.6	10.4
Other assets	(0.2)	(1.6)
Other noncurrent liabilities	6.1	0.9
Other operating activities	(2.2)	(0.1)
Net operating activities	112.4	41.1
Investing Activities
Capital expenditures	(128.4)	(63.4)
Business acquired in purchase transaction, net of cash acquired	(123.4)	0
Proceeds from disposition of property, plant and equipment	6.2	2.9
Distributions from affiliated companies, net	1.1	9.5
Restricted cash activity	30.4	0
Other investing activities	2.3	(0.5)
Net investing activities	(211.8)	(51.5)
Financing Activities
Long-term debt repayments	0	(18.9)
Issuance of common stock	0	9.2
Common stock repurchased and retired	(2.2)	0
Stock options exercised	7.3	2.3
Excess tax benefits from stock options exercised	2.0	0.2
Dividends paid	(48.0)	(47.5)
Net financing activities	(40.9)	(54.7)
Net decrease in cash and cash equivalents	(140.3)	(65.1)
Cash and cash equivalents, beginning of period	458.6	458.5
Cash and cash equivalents, end of period	318.3	393.4
Cash paid for interest and income taxes:
Interest	19.6	20.0
Income taxes, net of refunds	34.4	(5.6)
Non-cash investing activities:
Capital expenditures included in accounts payable and accrued liabilities	$ (4.2)	$ 10.0

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SEGMENT INFORMATION

9 Months Ended

Sep. 30, 2011

SEGMENT INFORMATION [Abstract]

SEGMENT INFORMATION

SEGMENT INFORMATION

We define segment results as income before interest expense, interest income, other operating income, other (expense) income and income taxes, and include the operating results of non-consolidated affiliates.

	Three Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
Sales:	($ in millions)
Chlor Alkali Products	$	386.1		$	275.3		$	1,065.8		$	763.9
Winchester		164.1			157.5			449.5			436.6
Total sales	$	550.2		$	432.8		$	1,515.3		$	1,200.5
Income before taxes:
Chlor Alkali Products	$	76.7		$	44.0		$	194.7		$	80.7
Winchester		13.1			18.8			37.4			59.4
Corporate/other:
Pension income		6.9			7.0			20.8			18.2
Environmental expense		(2.5	)		(8.4	)		(2.9	)		(9.1	)
Other corporate and unallocated costs		(15.7	)		(16.8	)		(53.6	)		(53.9	)
Restructuring charges		(4.1	)		—			(6.6	)		—
Other operating income		4.3			0.3			5.9			2.6
Interest expense		(7.9	)		(6.4	)		(22.5	)		(19.5	)
Interest income		0.2			0.3			0.7			0.7
Other (expense) income		(1.6	)		—			179.0			0.1
Income before taxes	$	69.4		$	38.8		$	352.9		$	79.2

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DERIVATIVE FINANCIAL INSTRUMENTS (Tables)

9 Months Ended

Sep. 30, 2011

DERIVATIVE FINANCIAL INSTRUMENTS [Abstract]

Schedule of derivative instruments

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

	September 30, 2011		December 31, 2010		September 30, 2010
	($ in millions)
Copper	$	54.3	$	25.1	$	26.0
Zinc		7.7		3.2		3.4
Lead		36.1		19.6		19.7
Natural gas		5.7		5.5		6.7

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:

	Asset Derivatives								Liability Derivatives
		Fair Value								Fair Value
Derivatives Designated as Hedging Instruments	Balance Sheet Location	September 30, 2011		December 31, 2010		September 30, 2010			Balance Sheet Location	September 30, 2011			December 31, 2010			September 30, 2010
		($ in millions)								($ in millions)
Interest rate contracts	Other current assets	$	—	$	—	$	—		Current installments of long-term debt	$	0.6		$	2.8		$	—
Interest rate contracts	Other assets		14.3		5.3		10.8		Long-term debt		14.0			5.3			14.3
Interest rate contracts	Other assets		—		—		—		Other liabilities		0.2			—			—
Commodity contracts – gains	Other current assets		—		16.9		10.6		Accrued liabilities		(2.3	)		—			—
Commodity contracts – losses	Other current assets		—		—		(0.2	)	Accrued liabilities		16.6			—			—
		$	14.3	$	22.2	$	21.2			$	29.1		$	8.1		$	14.3
Derivatives Not Designated as Hedging Instruments
Interest rate contracts	Other current assets	$	0.8	$	3.8	$	—		Accrued liabilities	$	0.3		$	1.2		$	—
Interest rate contracts	Other assets		—		—		4.7		Other liabilities		—			—			1.3
Commodity contracts - gains	Other current assets		—		—		—		Accrued liabilities		—			(0.1	)		—
Commodity contracts – losses	Other current assets		—		—		—		Accrued liabilities		0.4			0.3			0.8
Foreign currency contracts	Other current assets		—		—		—		Accrued liabilities		—			—			0.1
		$	0.8	$	3.8	$	4.7			$	0.7		$	1.4		$	2.2
Total derivatives(1)		$	15.1	$	26.0	$	25.9			$	29.8		$	9.5		$	16.5

(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 income:

		Amount of Gain (Loss)						Amount of Gain (Loss)
		Three Months Ended September 30,						Nine Months Ended September 30,
	Location of Gain (Loss)	2011			2010			2011			2010
Derivatives – Cash Flow Hedges		($ in millions)
Recognized in other comprehensive loss (effective portion)	———	$	(21.7	)	$	12.9		$	(21.3	)	$	(1.2	)
Reclassified from accumulated other comprehensive loss into income (effective portion)	Cost of goods sold	$	1.2		$	(1.1	)	$	11.8		$	6.6
Derivatives – Fair Value Hedges
Interest rate contracts	Interest expense	$	1.8		$	1.9		$	5.8		$	4.7
Derivatives Not Designated as Hedging Instruments
Interest rate contracts	Interest expense	$	(0.1	)	$	0.1		$	—		$	0.3
Commodity contracts	Cost of goods sold		(0.4	)		(0.9	)		(0.8	)		(1.2	)
Foreign currency contracts	Selling and administration		—			0.1			—			(0.1	)
		$	(0.5	)	$	(0.7	)	$	(0.8	)	$	(1.0	)

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DERIVATIVE FINANCIAL INSTRUMENTS

9 Months Ended

Sep. 30, 2011

DERIVATIVE FINANCIAL INSTRUMENTS [Abstract]

DERIVATIVE FINANCIAL INSTRUMENTS

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 statement of financial position and measure those instruments at fair value.  We use hedge accounting treatment for substantially all of our business transactions whose risks are covered using derivative instruments.  In accordance with ASC 815, we designate commodity forward contracts as cash flow hedges of forecasted purchases of commodities and 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 used in our Chlor Alkali Products segment, and certain raw materials and energy costs, namely copper, lead, zinc, electricity and natural gas used in our Winchester segment, are subject to price volatility.  Depending on market conditions, we may enter into futures contracts 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.  Those commodity contracts that extend beyond one year correspond with raw material purchases for long-term fixed-price sales contracts.

We enter into forward sales and purchase contracts to manage currency risk resulting from purchase and sale commitments denominated in foreign currencies (principally Canadian dollar and Euro).  All of the currency derivatives expire within one year and are for United States dollar equivalents.  Our foreign currency forward contracts do not meet the criteria to qualify for hedge accounting.  We had forward contracts to sell foreign currencies with a notional value of zero at both September 30, 2011 and December 31, 2010 and $0.2 million at September 30, 2010.  We had forward contracts to buy foreign currencies with a notional value of zero, $0.3 million and $1.3 million at September 30, 2011, December 30, 2010 and September 30, 2010, respectively.

In 2001 and 2002, we entered into interest rate swaps on $75 million of our underlying fixed-rate debt obligations, whereby we agreed to pay variable rates to a counterparty who, in turn, pays us fixed rates.  The counterparty to these agreements is Citibank, N.A. (Citibank), a major financial institution.  In January 2009, we entered into a $75 million fixed interest rate swap with equal and opposite terms as the $75 million variable interest rate swaps on the 9.125% senior notes due 2011 (2011 Notes).  We have agreed to pay a fixed rate to a counterparty who, in turn, pays us variable rates.  The counterparty to this agreement is Bank of America, N.A. (Bank of America), a major financial institution.  The result was a gain of $7.9 million on the $75 million variable interest rate swaps, which will be recognized through 2011.  As of September 30, 2011, $0.6 million of this gain was included in current installments of long-term debt.  In January 2009, we de-designated our $75 million interest rate swaps that had previously been designated as fair value hedges.  The $75 million variable interest rate swaps and the $75 million fixed interest rate swap do not meet the criteria for hedge accounting.  All changes in the fair value of these interest rate swaps are recorded currently in earnings.

Cash flow hedges

ASC 815 requires that all derivative instruments be recorded on the balance sheet at their fair value.  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 loss until the hedged item is recognized in earnings.  Gains and losses on the derivatives representing hedge ineffectiveness are recognized currently in earnings.

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

	September 30, 2011		December 31, 2010		September 30, 2010
	($ in millions)
Copper	$	54.3	$	25.1	$	26.0
Zinc		7.7		3.2		3.4
Lead		36.1		19.6		19.7
Natural gas		5.7		5.5		6.7

As of September 30, 2011, the counterparty to $67.5 million of these commodity forward contracts was Wells Fargo Bank, N.A. (Wells Fargo), a major financial institution.

We use cash flow hedges for certain raw material and energy costs such as copper, zinc, lead, 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 the company's manufacturing process.  At September 30, 2011, we had open positions in futures contracts through 2016.  If all open futures contracts had been settled on September 30, 2011, we would have recognized a pretax loss of $14.3 million.

If commodity prices were to remain at September 30, 2011 levels, approximately $11.7 million of deferred losses 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

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.  As of September 30, 2011, December 31, 2010 and September 30, 2010, the total notional amounts of our interest rate swaps designated as fair value hedges were $218.0 million, $132.7 million and $132.7 million, respectively.  In May 2011, we entered into an $85.3 million interest rate swap on the SunBelt Notes.  In April 2010, Citibank terminated $18.9 million of interest rate swaps on our industrial development and environmental improvement tax-exempt bonds (industrial revenue bonds) due in 2016.  The result was a gain of $0.4 million, which would have been recognized through 2016.  In September 2010, the industrial revenue bonds were redeemed by us, and as a result, the remaining $0.3 million gain was recognized in interest expense during the third quarter of 2010.  In March 2010, we entered into $125.0 million of interest rate swaps on the 6.75% senior notes due 2016 (2016 Notes).

We use interest rate swaps as a means of managing interest expense and floating interest rate exposure to optimal levels.  These interest rate swaps are treated as fair value hedges.  The accounting for gains and losses associated with changes in fair value of the derivative and the effect on the condensed financial statements will depend on the hedge designation and whether the hedge is effective in offsetting changes in fair value of cash flows of the asset or liability being hedged.  We have entered into $218.0 million of such swaps, whereby we agreed to pay variable rates to a counterparty who, in turn, pays us fixed rates.  The counterparties to these agreements are Citibank ($132.7 million) and Wells Fargo ($85.3 million).  In all cases, the underlying index for the variable rates is six-month London InterBank Offered Rate (LIBOR).  Accordingly, payments are settled every six months and the terms of the swaps are the same as the underlying debt instruments.

Financial statement impacts

We present our derivative assets and liabilities in our condensed balance sheets on a net basis.  We net derivative assets and liabilities 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:

	Asset Derivatives								Liability Derivatives
		Fair Value								Fair Value
Derivatives Designated as Hedging Instruments	Balance Sheet Location	September 30, 2011		December 31, 2010		September 30, 2010			Balance Sheet Location	September 30, 2011			December 31, 2010			September 30, 2010
		($ in millions)								($ in millions)
Interest rate contracts	Other current assets	$	—	$	—	$	—		Current installments of long-term debt	$	0.6		$	2.8		$	—
Interest rate contracts	Other assets		14.3		5.3		10.8		Long-term debt		14.0			5.3			14.3
Interest rate contracts	Other assets		—		—		—		Other liabilities		0.2			—			—
Commodity contracts – gains	Other current assets		—		16.9		10.6		Accrued liabilities		(2.3	)		—			—
Commodity contracts – losses	Other current assets		—		—		(0.2	)	Accrued liabilities		16.6			—			—
		$	14.3	$	22.2	$	21.2			$	29.1		$	8.1		$	14.3
Derivatives Not Designated as Hedging Instruments
Interest rate contracts	Other current assets	$	0.8	$	3.8	$	—		Accrued liabilities	$	0.3		$	1.2		$	—
Interest rate contracts	Other assets		—		—		4.7		Other liabilities		—			—			1.3
Commodity contracts - gains	Other current assets		—		—		—		Accrued liabilities		—			(0.1	)		—
Commodity contracts – losses	Other current assets		—		—		—		Accrued liabilities		0.4			0.3			0.8
Foreign currency contracts	Other current assets		—		—		—		Accrued liabilities		—			—			0.1
		$	0.8	$	3.8	$	4.7			$	0.7		$	1.4		$	2.2
Total derivatives(1)		$	15.1	$	26.0	$	25.9			$	29.8		$	9.5		$	16.5

(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 income:

		Amount of Gain (Loss)						Amount of Gain (Loss)
		Three Months Ended September 30,						Nine Months Ended September 30,
	Location of Gain (Loss)	2011			2010			2011			2010
Derivatives – Cash Flow Hedges		($ in millions)
Recognized in other comprehensive loss (effective portion)	———	$	(21.7	)	$	12.9		$	(21.3	)	$	(1.2	)
Reclassified from accumulated other comprehensive loss into income (effective portion)	Cost of goods sold	$	1.2		$	(1.1	)	$	11.8		$	6.6
Derivatives – Fair Value Hedges
Interest rate contracts	Interest expense	$	1.8		$	1.9		$	5.8		$	4.7
Derivatives Not Designated as Hedging Instruments
Interest rate contracts	Interest expense	$	(0.1	)	$	0.1		$	—		$	0.3
Commodity contracts	Cost of goods sold		(0.4	)		(0.9	)		(0.8	)		(1.2	)
Foreign currency contracts	Selling and administration		—			0.1			—			(0.1	)
		$	(0.5	)	$	(0.7	)	$	(0.8	)	$	(1.0	)

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, exceed 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, 2011, the amount recognized in accrued liabilities for cash collateral provided by us to counterparties was $7.0 million.  As of December 31, 2010 and September 30, 2010, the amount recognized in other current assets for cash collateral provided by counterparties to us was $3.2 million and $0.7 million, respectively.  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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Condensed Balance Sheets (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2010
Current assets:
Cash and cash equivalents	$ 318.3	$ 458.6	$ 393.4
Receivables, net	290.5	186.9	231.1
Income tax receivable	2.2	6.1	12.5
Inventories	166.3	155.6	157.3
Current deferred income taxes	50.4	46.0	40.9
Other current assets	11.1	29.6	17.6
Total current assets	838.8	882.8	852.8
Property, plant and equipment (less accumulated depreciation of $1,122.1, $1,068.1 and $1,048.2)	821.3	675.0	683.8
Prepaid pension costs	46.1	16.3	33.7
Restricted cash	71.6	102.0	0
Other assets	86.8	72.3	92.2
Goodwill	627.4	300.3	300.3
Total assets	2,492.0	2,048.7	1,962.8
Current liabilities:
Current installments of long-term debt	87.8	77.8	1.8
Accounts payable	129.6	115.5	107.9
Accrued liabilities	237.6	197.7	189.5
Total current liabilities	455.0	391.0	299.2
Long-term debt	501.8	418.2	385.1
Accrued pension liability	55.2	58.6	50.4
Deferred income taxes	113.5	23.5	39.8
Other liabilities	359.3	327.1	330.9
Total liabilities	1,484.8	1,218.4	1,105.4
Commitments and contingencies
Shareholders' equity:
Common stock, par value $1 per share: authorized, 120.0 shares; issued and outstanding 80.2, 79.6 and 79.6 shares	80.2	79.6	79.6
Additional paid-in capital	852.4	842.3	840.1
Accumulated other comprehensive loss	(270.6)	(261.8)	(246.3)
Retained earnings	345.2	170.2	184.0
Total shareholders' equity	1,007.2	830.3	857.4
Total liabilities and shareholders' equity	$ 2,492.0	$ 2,048.7	$ 1,962.8

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DESCRIPTION OF BUSINESS (Details)	Sep. 30, 2011
DESCRIPTION OF BUSINESS [Abstract]
Percent of ownership acquired in Sunbelt	50.00%
Percentage of ownership in Sunbelt prior to acquiring remaining 50%	50.00%

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FAIR VALUE MEASUREMENTS (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Feb. 28, 2011	Dec. 31, 2010
Assets
Interest rate swaps	$ 15.1	$ 15.5		$ 9.1
Commodity forward contracts		10.4		16.9
Liabilities
Interest rate swaps	15.1	15.6		9.3
Earn out	44.9
Foreign currency contracts		0.1
Commodity forward contracts	14.7	0.8		0.2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Assets measured at fair value on a nonrecurring basis			180.6
Gain on acquisition of Sunbelt	181.4	0
PolyOne Corporation's interest in SunBelt (in hundredths)	50.00%
Fair Value Measurements Level 1 [Member]
Assets
Interest rate swaps	0	0		0
Commodity forward contracts		4.2		7.0
Liabilities
Interest rate swaps	0	0		0
Earn out	0
Foreign currency contracts		0.1
Commodity forward contracts	4.8	0		0
Fair Value Measurements Level 2 [Member]
Assets
Interest rate swaps	15.1	15.5		9.1
Commodity forward contracts		6.2		9.9
Liabilities
Interest rate swaps	15.1	15.6		9.3
Earn out	0
Foreign currency contracts		0
Commodity forward contracts	9.9	0.8		0.2
Fair Value Measurements Level 3 [Member]
Assets
Interest rate swaps	0	0		0
Commodity forward contracts		0		0
Liabilities
Interest rate swaps	0	0		0
Earn out	44.9
Foreign currency contracts		0
Commodity forward contracts	0	0		0
Financial Instruments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of year	0	0
Unrealized loss included in other (expense) income	(2.6)	0
Purchases, sales and settlements	(42.3)	0
Balance at end of period	(44.9)	0
Long term Debt Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated fair value of debt	610.9	420.3		530.3
Long Term Debt Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated fair value of debt	$ 589.6	$ 386.9		$ 496.0

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STOCK-BASED COMPENSATION (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
STOCK-BASED COMPENSATION [Abstract]
Stock-based compensation expense	$ 1.9	$ 2.2	$ 6.7	$ 7.9
Mark-to-market adjustment	(2.0)	0.9	(1.2)	1.1
Total (income) expense	$ (0.1)	$ 3.1	$ 5.5	$ 9.0
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology
Option pricing model used			Black-Scholes
Dividend yield (in hundredths)			4.32%	4.32%
Risk-free interest rate (in hundredths)			3.05%	3.00%
Expected volatility (in hundredths)			42.00%	42.00%
Expected life (years)			7.0	7.0
Grant fair value (per option)			$ 5.48	$ 4.61
Exercise price	$ 18.78	$ 15.68	$ 18.78	$ 15.68
Shares granted (in shares)			575,000	803,750

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PENSION PLANS AND RETIREMENT BENEFITS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Mar. 31, 2010
PENSION PLANS AND RETIREMENT BENEFITS [Abstract]
Contribution to an individual retirement account as a percentage of employee's eligible compensation under age 45 (in hundredths)	5.00%		5.00%
Contribution to an individual retirement account as a percentage of employee's eligible compensation age 45 and older (in hundredths)	7.50%		7.50%
Defined contribution pension plans expense	$ 3.5	$ 3.3	$ 10.9	$ 10.5
Components of Net Periodic Benfit (Income) Cost
Employer's contribution to defined benefit pension			0.7	7.3
Withdrawal from a multi-employer defined benefit pension plan					1.3
Pension Benefits [Member]
Components of Net Periodic Benfit (Income) Cost
Service cost	1.6	1.5	4.8	4.5
Interest cost	23.4	24.4	70.6	73.9
Expected return on plans' assets	(34.9)	(34.6)	(104.7)	(103.9)
Amortization of prior service cost	0.1	0.1	0.3	0.4
Recognized actuarial loss	3.8	3.3	11.3	9.7
Curtailments			1.1	0
Net periodic benefit (income) cost	(6.0)	(5.3)	(16.6)	(15.4)
Other Postretirement Benefits [Member]
Components of Net Periodic Benfit (Income) Cost
Service cost	0.2	0.3	0.9	1.0
Interest cost	0.7	0.8	2.6	2.8
Expected return on plans' assets	0	0	0	0
Amortization of prior service cost	0	0	(0.1)	(0.1)
Recognized actuarial loss	1.0	0.5	2.4	1.9
Curtailments			0	0
Net periodic benefit (income) cost	$ 1.9	$ 1.6	$ 5.8	$ 5.6

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ACQUISITION (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	1 Months Ended		1 Months Ended	3 Months Ended	12 Months Ended		3 Months Ended		9 Months Ended		12 Months Ended		12 Months Ended
	Feb. 28, 2011	Sep. 30, 2011	Feb. 28, 2011 SunBelt [Member]	Jun. 30, 2011 SunBelt [Member]	Dec. 31, 2011 SunBelt [Member]	Mar. 31, 2011 SunBelt [Member]	Sep. 30, 2011 SunBelt [Member]	Sep. 30, 2010 SunBelt [Member]	Sep. 30, 2011 SunBelt [Member]	Sep. 30, 2010 SunBelt [Member]	Dec. 31, 2011 Guaranteed Senior Secured Notes due 2017, Series O [Member]	Dec. 22, 1997 Guaranteed Senior Secured Notes due 2017, Series O [Member]	Dec. 31, 2011 Guaranteed Senior Secured Notes due 2017, Series G [Member]	Dec. 22, 1997 Guaranteed Senior Secured Notes due 2017, Series G [Member]
Business Acquisition [Line Items]
PolyOne Corporation's interest in SunBelt (in hundredths)		50.00%	50.00%
Cash consideration for SunBelt purchase			$ 132.3
Olin's ownership percentage of SunBelt after acquisition of PolyOne's interest (in hundredths)			100.00%
Membrane technology capacity of plant			350,000
Earn out agreement term			three year
Cash remitted to PolyOne for distributable cash generated by SunBelt				6.0
Distributable cash non-consolidated affiliate				50.00%
Required annual debt repayment for Series O and Series G notes					12.2						6.1		6.1
Remaining principal balance of consolidated notes			85.3
Previous equity percentage in SunBelt (in hundredths)		50.00%	50.00%
Discrete deferred tax expense relating to the SunBelt acquisition			76.0
Total current assets			37.6
Property, plant and equipment			87.4
Deferred income taxes			0.4
Other assets			5.8
Total assets acquired			131.2
Total current liabilities			42.7
Long-term debt			75.1
Other liabilities			27.6
Total liabilities assumed			145.4
Less Investment in SunBelt			(0.8)
Net liabilities assumed			(13.4)
Liabilities for uncertainties			48.3
Gain on remeasurement of investment in SunBelt			181.4
Goodwill			327.1			327.9
Fair value of assets acquired			180.6
Cash and cash equivalents			8.9
Current installment of long term debt			12.2
Equity earnings of nonconsolidated affiliate for Sunbelt			6.3
Pretax gain on acquisition of SunBelt			181.4
Debt Instrument [Line Items]
Face amount of senior secured notes												97.5		97.5
Interest rate on SunBelt notes												7.23%		7.23%
Required annual debt repayment for Series O and Series G notes					12.2						6.1		6.1
Finite-Lived Intangible Assets [Line Items]
Final valuation of intangible assets relating to customers, customer contracts and relationships	5.8
Estimated useful life of intangible assets (in years)	15
Tax deductible portion of goodwill	163.7
Segment Reporting Information [Line Items]
SunBelt sales							58.9		125.0
SunBelt pretax income							11.7		23.2
SunBelt pretax income included in Chlor Alkali Products							14.4		29.4
Sunbelt acquisition costs included in Chlor Alkali Products									0.8
Sunbelt interest expense							1.0		2.8
Pro forma summary of the condensed statements of income as if the Sunbelt acquisition occurred on January 1, 2010 [Abstract]
Sales								484.4	1,541.6	1,321.1
Net income								44.9	121.9	86.4
Net income per common share basic (in dollars per share)								$ 0.57	$ 1.53	$ 1.09
Net income per common share diluted (in dollars per share)								$ 0.56	$ 1.51	$ 1.08
Additional amortization expense related to the fair value of acquired identifiable intangible assets								0.1	0.1	0.3
Reduction of depreciation expense related to the fair value adjustment to property, plant and equipment								1.4	1.0	4.3
Reduction in interest expense as a result of increasing the carrying value of acquired debt obligations to its estimated fair value								0.2	0.1	0.4
Additional accretion expense for the earn out liability that was recorded as a result of the acquisition								0.6	0.4	1.9
Deferred tax expense related to the tax effect of gain on the remeasurement of equity interest in SunBelt									76.0
Pro forma increase of tax provision due to fair value adjustments								3.4	2.3	6.1
Expense for earn out liability							$ 1.7		$ 2.6