Olin (OLN) 10-Q 1 Aug 17 2017 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Document and Entity Information [Abstract]
Entity Registrant Name	Olin Corporation
Entity Central Index Key	74,303
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding	166,258,140
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float		$ 2,060,950,212

Condensed Balance Sheets

Condensed Balance Sheets - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 184.5	$ 184.5	$ 66.6	$ 392
Receivables, net	782.2	675	790.5
Income taxes receivable	20.9	25.5	45.8
Inventories	666.2	630.4	636.2
Other current assets	37.2	30.8	23.8
Total current assets	1,691	1,546.2	1,562.9
Property, plant and equipment (less accumulated depreciation of $2,117.6, $1,891.6 and $1,681.2)	3,627.4	3,704.9	3,793.3
Deferred income taxes	125.2	119.5	107
Other assets	625.6	644.4	588.6
Intangible Assets, Net	605.6	629.6	671.2
Goodwill	2,119.5	2,118	2,186.3	2,174.1
Total assets	8,794.3	8,762.6	8,909.3
Current liabilities:
Current installments of long-term debt	81.7	80.5	80.3
Accounts payable	656.1	570.8	536.4
Income taxes payable	7.1	7.5	8.2
Accrued liabilities	261.5	263.8	293.6
Total current liabilities	1,006.4	922.6	918.5
Long-term debt	3,518.9	3,537.1	3,615.5
Accrued pension liability	625.6	638.1	616.7
Deferred income taxes	1,037.6	1,032.5	1,079.3
Other liabilities	347.2	359.3	348.3
Total liabilities	6,535.7	6,489.6	6,578.3
Commitments and contingencies
Shareholders' equity:
Common stock, par value $1 per share: authorized, 240.0 shares; issued and outstanding, 166.3, 165.4 and 165.2 shares	166.3	165.4	165.2
Additional paid-in capital	2,262.7	2,243.8	2,240.3
Accumulated other comprehensive loss	(485.4)	(510)	(479.3)	(492.5)
Retained earnings	315	373.8	404.8
Total shareholders' equity	2,258.6	2,273	2,331	$ 2,418.8
Total liabilities and shareholders' equity	$ 8,794.3	$ 8,762.6	$ 8,909.3

Condensed Balance Sheets Parent

Condensed Balance Sheets Parenthetical - USD ($) shares in Millions, $ in Millions	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
ASSETS
Accumulated depreciation	$ 2,117.6	$ 1,891.6	$ 1,681.2
Shareholders' equity:
Common stock, par value	$ 1	$ 1	$ 1
Common stock, authorized (in shares)	240	240	240
Common stock, issued	166.3	165.4	165.2
Common stock, outstanding	166.3	165.4	165.2

Condensed Statements of Operati

Condensed Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Sales	$ 1,526.5	$ 1,364	$ 3,093.6	$ 2,712.2
Operating expenses:
Cost of goods sold	1,404.1	1,236.9	2,797.8	2,412.3
Selling and administration	80	79.3	168.2	167.4
Restructuring charges	8.5	8.2	16.7	101
Acquisition-related costs	4.4	16.3	11.4	26.5
Other operating income (expense)	0.3	(0.2)	(0.1)	10.7
Operating income	29.8	23.1	99.4	15.7
Earnings of non-consolidated affiliates	0.5	0.4	1	0.6
Interest expense	52.5	47.6	104.9	96.1
Interest income	0.4	0.5	0.6	0.8
Loss before taxes	(21.8)	(23.6)	(3.9)	(79)
Income tax benefit	(15.9)	(22.6)	(11.4)	(40.1)
Net (loss) income	$ (5.9)	$ (1)	$ 7.5	$ (38.9)
Net (loss) income per common share:
Basic	$ (0.04)	$ (0.01)	$ 0.05	$ (0.24)
Diluted	(0.04)	(0.01)	0.04	(0.24)
Dividends per common share	$ 0.20	$ 0.20	$ 0.40	$ 0.40
Average common shares outstanding:
Basic	166.1	165.2	165.8	165.1
Diluted	166.1	165.2	168	165.1

Condensed Statements of Compreh

Condensed Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net (loss) income	$ (5.9)	$ (1)	$ 7.5	$ (38.9)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments, net	15.9	(10.8)	21.9	4.7
Unrealized (losses) gains on derivative contracts, net	(3.7)	(1.8)	(5.7)	1.2
Amortization of prior service costs and actuarial losses, net	4.5	3.5	8.4	7.3
Total other comprehensive income (loss), net of tax	16.7	(9.1)	24.6	13.2
Comprehensive income (loss)	$ 10.8	$ (10.1)	$ 32.1	$ (25.7)

Condensed Statements of Shareho

Condensed Statements of Shareholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Retained Earnings
Balance (in shares) at Dec. 31, 2015		165.1
Balance at Dec. 31, 2015	$ 2,418.8	$ 165.1	$ 2,236.4	$ (492.5)	$ 509.8
Net (loss) income	(38.9)	0	0	0	(38.9)
Other comprehensive income	13.2	0	0	13.2	0
Dividends paid:
Common stock ($0.40 per share)	$ (66.1)	$ 0	0	0	(66.1)
Common stock issued for:
Stock options exercised (in shares)	0.1	0
Stock options exercised	$ 0.2	$ 0	0.2	0	0
Other Transactions (in shares)		0.1
Other Transactions	0.8	$ 0.1	0.7	0	0
Stock-based compensation	3	$ 0	3	0	0
Balance (in shares) at Jun. 30, 2016		165.2
Balance at Jun. 30, 2016	2,331	$ 165.2	2,240.3	(479.3)	404.8
Balance (in shares) at Dec. 31, 2016		165.4
Balance at Dec. 31, 2016	2,273	$ 165.4	2,243.8	(510)	373.8
Net (loss) income	7.5	0	0	0	7.5
Other comprehensive income	24.6	0	0	24.6	0
Dividends paid:
Common stock ($0.40 per share)	$ (66.3)	$ 0	0	0	(66.3)
Common stock issued for:
Stock options exercised (in shares)	0.9	0.9
Stock options exercised	$ 15.8	$ 0.9	14.9	0	0
Other Transactions (in shares)		0
Other Transactions	0.6	$ 0	0.6	0	0
Stock-based compensation	3.4	$ 0	3.4	0	0
Balance (in shares) at Jun. 30, 2017		166.3
Balance at Jun. 30, 2017	$ 2,258.6	$ 166.3	$ 2,262.7	$ (485.4)	$ 315

Condensed Statements of Shareh7

Condensed Statements of Shareholders' Equity Parenthetical - $ / shares	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Statement of Stockholders' Equity [Abstract]
Dividends Paid, Common Stock, per share	$ 0.40	$ 0.40

Condensed Statements of Cash Fl

Condensed Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Operating Activities
Net (loss) income	$ 7.5	$ (38.9)
Adjustments to reconcile net (loss) income to net cash and cash equivalents provided by (used for) operating activities:
Earnings of non-consolidated affiliates	(1)	(0.6)
Losses (gains) on disposition of property, plant and equipment	0.3	0.5
Stock-based compensation	4	3.7
Depreciation and amortization	272.2	262.1
Deferred income taxes	(11.6)	(33.2)
Write-off of equipment and facility included in restructuring charges	0	76.6
Qualified pension plan contributions	(0.9)	(0.7)
Qualified pension plan income	(13.7)	(18.7)
Change in:
Receivables	(97.9)	(37.4)
Income taxes receivable/payable	3.3	(9.6)
Inventories	(26.3)	25.8
Other current assets	(10.3)	15
Accounts payable and accrued liabilities	99.6	(57)
Other assets	5.8	(1.1)
Other noncurrent liabilities	(9.2)	1.6
Other operating activities	5.6	(1.9)
Net operating activities	227.4	186.2
Investing Activities
Capital expenditures	(150.9)	(137.4)
Payments to Acquire Businesses, Net of Cash Acquired	0	(69.5)
Payments under long-term supply contract	0	(85)
Proceeds from disposition of property, plant and equipment	0.1	0.4
Proceeds from disposition of affiliated companies	0	4.4
Net investing activities	(150.8)	(287.1)
Financing Activities
Proceeds from Issuance of Long-term Debt	1,875	0
Long-term debt repayments	(1,890.1)	(159)
Stock options exercised	15.8	0.2
Dividends paid	(66.3)	(66.1)
Debt issuance costs	(11.2)	0
Net financing activities	(76.8)	(224.9)
Effect of exchange rate changes on cash and cash equivalents	0.2	0.4
Net decrease in cash and cash equivalents	0	(325.4)
Cash and cash equivalents, beginning of period	184.5	392
Cash and cash equivalents, end of period	184.5	66.6
Cash paid for interest and income taxes:
Interest, net	93.3	102.1
Income taxes, net of refunds	5.2	11.2
Non-cash investing activities:
Capital expenditures included in accounts payable and accrued liabilities	$ 24.1	$ 2.3

DESCRIPTION OF BUSINESS

DESCRIPTION OF BUSINESS	6 Months Ended
	Jun. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
DESCRIPTION OF BUSINESS	DESCRIPTION OF BUSINESS Olin Corporation (Olin) is a Virginia corporation, incorporated in 1892, having its principal executive offices in Clayton, MO. We are a manufacturer concentrated in three business segments: Chlor Alkali Products and Vinyls, Epoxy and Winchester. The Chlor Alkali Products and Vinyls segment manufactures and sells chlorine and caustic soda, ethylene dichloride (EDC) and vinyl chloride monomer, methyl chloride, methylene chloride, chloroform, carbon tetrachloride, perchloroethylene, trichloroethylene and vinylidene chloride, hydrochloric acid, hydrogen, bleach products and potassium hydroxide. The Epoxy segment produces and sells a full range of epoxy materials, including allyl chloride, epichlorohydrin, liquid epoxy resins and downstream products such as converted epoxy resins and additives. The Winchester segment produces and sells 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 U.S. Securities and Exchange Commission (SEC). The preparation of the financial statements requires estimates and assumptions that affect amounts reported and disclosed in the financial statements and related notes. In our opinion, these financial statements reflect all adjustments (consisting only of normal accruals), which are necessary to present fairly the results for interim periods. Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles have been condensed or omitted pursuant to such rules and regulations; however, we believe that the disclosures are appropriate. We recommend that you read these condensed financial statements in conjunction with the financial statements, accounting policies and the notes thereto and Management’s Discussion and Analysis of Financial Condition and Results of Operations included in our Annual Report on Form 10-K for the year ended December 31, 2016 . Certain reclassifications were made to prior year amounts to conform to the 2017 presentation.

ACQUISITION

ACQUISITION	6 Months Ended
	Jun. 30, 2017
Acquisition [Abstract]
ACQUISITION	ACQUISITION On October 5, 2015 (the Closing Date), we completed the acquisition (the Acquisition) from The Dow Chemical Company (TDCC) of its U.S. Chlor Alkali and Vinyl, Global Chlorinated Organics and Global Epoxy businesses (collectively, the Acquired Business), whose operating results are included in the accompanying financial statements since the Closing Date. We incurred costs related to the integration of the Acquired Business which consisted of advisory, legal, accounting and other professional fees of $4.4 million and $16.3 million for the three months ended June 30, 2017 and 2016 , respectively, and $11.4 million and $26.5 million for the six months ended June 30, 2017 and 2016 , respectively. For the three months ended June 30, 2016 , payments of $69.5 million were made related to certain acquisition-related liabilities, including the final working capital adjustment.

RESTRUCTURING CHARGES

RESTRUCTURING CHARGES	6 Months Ended
	Jun. 30, 2017
Restructuring and Related Activities [Abstract]
RESTRUCTURING CHARGE	RESTRUCTURING CHARGES On March 21, 2016, we announced that we had made the decision to close a combined total of 433,000 tons of chlor alkali capacity across three separate locations. Associated with this action, we have permanently closed our Henderson, NV chlor alkali plant with 153,000 tons of capacity and have reconfigured the site to manufacture bleach and distribute caustic soda and hydrochloric acid. Also, the capacity of our Niagara Falls, NY chlor alkali plant has been reduced from 300,000 tons to 240,000 tons and the chlor alkali capacity at our Freeport, TX facility was reduced by 220,000 tons. This 220,000 ton reduction was entirely from diaphragm cell capacity. For the three months ended June 30, 2017 and 2016 , we recorded pretax restructuring charges of $7.4 million and $7.9 million , respectively, for employee severance and related benefit costs, employee relocation costs, facility exit costs and lease and other contract termination costs related to these actions. For the six months ended June 30, 2017 and 2016 , we recorded pretax restructuring charges of $14.9 million and $100.1 million , respectively, for the write-off of equipment and facility costs, lease and other contract termination costs, employee severance and related benefit costs, employee relocation costs and facility exit costs related to these actions. We expect to incur additional restructuring charges through 2020 of approximately $25 million related to these capacity reductions. This estimate of additional restructuring charges does not include any additional charges related to a contract termination that is currently in dispute. The other party to the contract has filed a demand for arbitration alleging, among other things, that Olin breached the related agreement and claimed damages in excess of the amount Olin believes it is obligated for under the contract. Any additional losses related to this contract dispute are not currently estimable because of unresolved questions of fact and law but, if resolved unfavorably to Olin, they could have a material effect on our financial results. On December 12, 2014, we announced that we had made the decision to permanently close the portion of the Becancour, Canada chlor alkali facility that has been shut down since late June 2014. This action reduced the facility’s chlor alkali capacity by 185,000 tons. Subsequent to the shut down, the plant predominantly focuses on bleach and hydrochloric acid, which are value-added products, as well as caustic soda. For the three months ended June 30, 2017 and 2016 , we recorded pretax restructuring charges of $1.1 million and $0.1 million , respectively, for facility exit costs related to these actions. For the six months ended June 30, 2017 and 2016 , we recorded pretax restructuring charges of $1.8 million and $0.4 million , respectively, for lease and other contract termination costs and facility exit costs related to these actions. We expect to incur additional restructuring charges through 2018 of approximately $5 million related to the shut down of this portion of the facility. On November 3, 2010, we announced that we made the decision to relocate the Winchester centerfire pistol and rifle ammunition manufacturing operations from East Alton, IL to Oxford, MS. Consistent with this decision in 2010, we initiated an estimated $110 million five-year project, which included approximately $80 million of capital spending. The capital spending was partially financed by $31 million of grants provided by the State of Mississippi and local governments. During 2016, the final rifle ammunition production equipment relocation was completed. For the three and six months ended June 30, 2016 , we recorded pretax restructuring charges of $0.2 million and $0.5 million , respectively, for employee relocation costs and facility exit costs related to these actions. The following table summarizes the 2017 and 2016 activities by major component of these restructuring actions and the remaining balances of accrued restructuring costs as of June 30, 2017 and 2016 : Employee severance and job related benefits Lease and other contract termination costs Employee relocation costs Facility exit costs Write-off of equipment and facility Total ($ in millions) Balance at January 1, 2016 $ 4.6 $ 2.1 $ — $ — $ — $ 6.7 Restructuring charges: First quarter 3.9 9.2 0.2 2.9 76.6 92.8 Second quarter 0.2 — 0.8 7.2 — 8.2 Amounts utilized (3.6 ) (1.3 ) (1.0 ) (7.9 ) (76.6 ) (90.4 ) Currency translation adjustments — 0.1 — — — 0.1 Balance at June 30, 2016 $ 5.1 $ 10.1 $ — $ 2.2 $ — $ 17.4 Balance at January 1, 2017 $ 3.4 $ 7.5 $ — $ 1.8 $ — $ 12.7 Restructuring charges: First quarter — 5.7 0.2 2.3 — 8.2 Second quarter — 5.8 0.1 2.6 — 8.5 Amounts utilized (2.6 ) (2.6 ) (0.3 ) (6.6 ) — (12.1 ) Balance at June 30, 2017 $ 0.8 $ 16.4 $ — $ 0.1 $ — $ 17.3 The following table summarizes the cumulative restructuring charges of these 2016, 2014 and 2010 restructuring actions by major component through June 30, 2017 : Chlor Alkali Products and Vinyls Winchester Total Becancour Capacity Reductions ($ in millions) Write-off of equipment and facility $ 3.5 $ 76.6 $ — $ 80.1 Employee severance and job related benefits 2.7 5.1 13.1 20.9 Facility exit costs 3.1 17.8 2.3 23.2 Pension and other postretirement benefits curtailment — — 4.1 4.1 Employee relocation costs — 1.7 6.0 7.7 Lease and other contract termination costs 5.3 25.0 — 30.3 Total cumulative restructuring charges $ 14.6 $ 126.2 $ 25.5 $ 166.3 As of June 30, 2017 , we have incurred cash expenditures of $63.6 million and non-cash charges of $84.6 million related to these restructuring actions. The remaining balance of $17.3 million is expected to be paid out through 2020 .

ACCOUNTS RECEIVABLE

ACCOUNTS RECEIVABLE	6 Months Ended
	Jun. 30, 2017
ACCOUNTS RECEIVABLE [Abstract]
ACCOUNTS RECEIVABLE	ACCOUNTS RECEIVABLES On December 20, 2016, we entered into a three year, $250.0 million Receivables Financing Agreement with PNC Bank, National Association, as administrative agent (Receivables Financing Agreement). Under the Receivables Financing Agreement, our eligible trade receivables are used for collateralized borrowings and continue to be serviced by us. As of June 30, 2017 , $326.1 million of our trade receivables were pledged as collateral and we had $210.0 million drawn under the agreement. As of June 30, 2017 , we had additional borrowing capacity of $32.3 million under the Receivables Financing Agreement. As of December 31, 2016 , $282.3 million of our trade receivables were pledged as collateral and $210.0 million was drawn under the agreement. For the year ended December 31, 2016 , the proceeds of the Receivables Financing Agreement were used to repay $210.0 million of the $800.0 million Sumitomo term loan facility (the Sumitomo Credit Facility). In addition, the Receivables Financing Agreement incorporates the leverage and coverage covenants that are contained in the senior revolving credit facilities. On June 29, 2016, we entered into a trade accounts receivable factoring arrangement which was amended on September 1, 2016 and, on December 22, 2016, we entered into a separate trade accounts receivable factoring arrangement which was amended on March 24, 2017 (collectively the AR Facilities). Pursuant to the terms of the AR Facilities, certain of our subsidiaries may sell their accounts receivable up to a maximum of $256.5 million . We will continue to service such accounts. These receivables qualify for sales treatment under Accounting Standards Codification (ASC) 860 “Transfers and Servicing” (ASC 860) and, accordingly, the proceeds are included in net cash provided by operating activities in the condensed statements of cash flows. The gross amount of receivables sold for the three months ended June 30, 2017 and 2016 totaled $388.0 million and $26.8 million , respectively, and for the six months ended June 30, 2017 and 2016 totaled $777.6 million and $26.8 million , respectively. The factoring discount paid under the AR Facilities is recorded as interest expense on the condensed statements of operations. The agreements are without recourse and therefore no recourse liability has been recorded as of June 30, 2017 . As of June 30, 2017 , December 31, 2016 and June 30, 2016 , $148.4 million , $126.1 million and $26.8 million , respectively, of receivables qualifying for sales treatment were outstanding and will continue to be serviced by us.

ALLOWANCE FOR DOUBTFUL ACCOUNTS

ALLOWANCE FOR DOUBTFUL ACCOUNTS RECEIVABLES	6 Months Ended
	Jun. 30, 2017
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: June 30, 2017 2016 ($ in millions) Balance at beginning of year $ 10.1 $ 6.4 Provisions charged 2.1 2.2 Write-offs, net of recoveries — (0.8 ) Balance at end of period $ 12.2 $ 7.8 Provisions charged to operations were $0.7 million and $0.8 million for the three months ended June 30, 2017 and 2016 , respectively.

INVENTORIES

INVENTORIES	6 Months Ended
	Jun. 30, 2017
Inventory Disclosure [Abstract]
INVENTORIES	INVENTORIES Inventories consisted of the following: June 30, December 31, June 30, ($ in millions) Supplies $ 59.7 $ 58.1 $ 60.9 Raw materials 74.9 72.6 82.1 Work in process 133.7 110.7 102.8 Finished goods 445.8 424.9 423.4 714.1 666.3 669.2 LIFO reserve (47.9 ) (35.9 ) (33.0 ) Inventories, net $ 666.2 $ 630.4 $ 636.2 Inventories are valued at the lower of cost and net realizable value. For U.S. inventories, inventory costs are determined principally by the last-in, first-out (LIFO) method of inventory accounting while for international inventories, inventory costs are determined principally by the first-in, first-out (FIFO) 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 June 30, 2017 reflect certain estimates relating to inventory quantities and costs at December 31, 2017 . The replacement cost of our inventories would have been approximately $47.9 million , $35.9 million and $33.0 million higher than reported at June 30, 2017 , December 31, 2016 and June 30, 2016 , respectively.

OTHER ASSETS

OTHER ASSETS	6 Months Ended
	Jun. 30, 2017
Other Assets [Abstract]
OTHER ASSETS	OTHER ASSETS Included in other assets were the following: June 30, 2017 December 31, 2016 June 30, 2016 ($ in millions) Investments in non-consolidated affiliates $ 27.7 $ 26.7 $ 25.6 Deferred debt issuance costs 2.8 2.6 2.9 Tax-related receivables 16.0 17.5 18.2 Interest rate swaps 4.7 7.7 3.7 Supply contracts 554.1 566.7 518.8 Other 20.3 23.2 19.4 Other assets $ 625.6 $ 644.4 $ 588.6 In connection with the Acquisition, Olin and TDCC entered into arrangements for the long-term supply of ethylene by TDCC to Olin, pursuant to which, among other things, Olin made upfront payments of $433.5 million on the Closing Date in order to receive ethylene at producer economics and for certain reservation fees for the option to obtain additional future ethylene supply at producer economics. The fair value of the long-term supply contracts recorded as of the Closing Date was a long-term asset of $416.1 million which will be amortized over the life of the contracts as ethylene is received. During 2016, one of the options to reserve additional future ethylene supply at producer economics was exercised by us and, accordingly, additional payments will be made to TDCC of approximately $209.4 million in 2017, which will increase the value of the long-term asset. On February 27, 2017, we exercised the remaining option to reserve additional future ethylene supply and, in connection with the exercise, we also secured a long-term customer arrangement. Consequently, additional payments will be made to TDCC of between $425 million and $465 million on or about the fourth quarter of 2020, which will increase the value of the long-term asset. During 2016, Olin entered into arrangements to increase our supply of low cost electricity. In conjunction with these arrangements, Olin made payments of $175.7 million in 2016 , including $85.0 million for the six months ended June 30, 2016 . The payments made under these arrangements will be amortized over the life of the contracts as electrical power is received. Amortization expense of $6.3 million and $4.4 million for the three months ended June 30, 2017 and 2016 , respectively, and $12.6 million and $8.7 million for the six months ended June 30, 2017 and 2016 , respectively, was recognized within cost of goods sold related to these supply contracts and is reflected in depreciation and amortization on the condensed statements of cash flows. The long-term supply contracts are monitored for impairment each reporting period.

GOODWILL AND INTANGIBLES

GOODWILL AND INTANGIBLES	6 Months Ended
	Jun. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND INTANGIBLES	GOODWILL AND INTANGIBLE ASSETS Changes in the carrying value of goodwill were as follows: Chlor Alkali Products and Vinyls Epoxy Total ($ in millions) Balance at January 1, 2016 $ 1,877.5 $ 296.6 $ 2,174.1 Acquisition activity 9.7 2.2 11.9 Foreign currency translation adjustment 0.2 0.1 0.3 Balance at June 30, 2016 $ 1,887.4 $ 298.9 $ 2,186.3 Balance at January 1, 2017 $ 1,831.3 $ 286.7 2,118.0 Foreign currency translation adjustment 1.2 0.3 1.5 Balance at June 30, 2017 $ 1,832.5 $ 287.0 $ 2,119.5 Intangible assets consisted of the following: June 30, 2017 December 31, 2016 June 30, 2016 Gross Amount Accumulated Amortization Net Gross Amount Accumulated Amortization Net Gross Amount Accumulated Amortization Net ($ in millions) Customers, customer contracts and relationships $ 675.0 $ (138.2 ) $ 536.8 $ 667.8 $ (112.9 ) $ 554.9 $ 672.3 $ (88.8 ) $ 583.5 Trade name 7.0 (2.5 ) 4.5 17.8 (12.7 ) 5.1 17.9 (6.5 ) 11.4 Acquired technology 85.3 (21.3 ) 64.0 84.2 (15.0 ) 69.2 84.9 (9.1 ) 75.8 Other 2.3 (2.0 ) 0.3 2.3 (1.9 ) 0.4 2.3 (1.8 ) 0.5 Total intangible assets $ 769.6 $ (164.0 ) $ 605.6 $ 772.1 $ (142.5 ) $ 629.6 $ 777.4 $ (106.2 ) $ 671.2 Intangible assets with indefinite useful lives are reviewed annually in the fourth quarter and/or when circumstances or other events indicate the indefinite life is no longer supportable. In connection with the integration of the Acquired Business, in the first quarter of 2016, the K.A. Steel Chemicals Inc. trade name was changed from an indefinite life intangible asset to an intangible asset with a finite useful life of one year. Amortization expense of $2.8 million and $5.5 million was recognized within cost of goods sold for the three and six months ended June 30, 2016 , respectively, related to the change in useful life.

EARNINGS PER SHARE

EARNINGS PER SHARE	6 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
EARNINGS PER SHARE	EARNINGS PER SHARE Basic and diluted net (loss) income per share are computed by dividing net (loss) income by the weighted-average number of common shares outstanding. Diluted net (loss) income per share reflects the dilutive effect of stock-based compensation. Three Months Ended Six Months Ended 2017 2016 2017 2016 Computation of (Loss) Income per Share (In millions, except per share data) Net (loss) income $ (5.9 ) $ (1.0 ) $ 7.5 $ (38.9 ) Basic shares 166.1 165.2 165.8 165.1 Basic net (loss) income per share $ (0.04 ) $ (0.01 ) $ 0.05 $ (0.24 ) Diluted shares: Basic shares 166.1 165.2 165.8 165.1 Stock-based compensation — — 2.2 — Diluted shares 166.1 165.2 168.0 165.1 Diluted net (loss) income per share $ (0.04 ) $ (0.01 ) $ 0.04 $ (0.24 ) The computation of dilutive shares from stock-based compensation does not include 6.9 million shares for both the three months ended June 30, 2017 and 2016 , and 1.6 million shares and 6.9 million shares for the six months ended June 30, 2017 and 2016 , respectively, as their effect would have been anti-dilutive.

ENVIRONMENTAL

ENVIRONMENTAL	6 Months Ended
	Jun. 30, 2017
Environmental Remediation Obligations [Abstract]
ENVIRONMENTAL	ENVIRONMENTAL We are party to various government and private environmental actions associated with past manufacturing facilities and former waste disposal sites. The condensed balance sheets included reserves for future environmental expenditures to investigate and remediate known sites amounting to $135.7 million , $137.3 million and $138.9 million at June 30, 2017 , December 31, 2016 and June 30, 2016 , respectively, of which $118.7 million , $120.3 million and $119.9 million , respectively, were classified as other noncurrent liabilities. Environmental provisions charged to income, which are included in cost of goods sold, were $1.8 million and $2.4 million for the three months ended June 30, 2017 and 2016 , respectively, and $4.4 million and $5.1 million for the six months ended June 30, 2017 and 2016 , respectively. In connection with the Acquisition, TDCC retained liabilities relating to releases of hazardous materials and violations of environmental law to the extent arising prior to the Closing Date. 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

COMMITMENTS AND CONTINGENCIES	6 Months Ended
	Jun. 30, 2017
Commitments and Contingencies Disclosure [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 June 30, 2017 , December 31, 2016 and June 30, 2016 , our condensed balance sheets included liabilities for these legal actions of $15.9 million , $13.6 million and $22.1 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, cash flows or results of operations. In connection with the Acquisition, TDCC retained liabilities related to litigation to the extent arising prior to the Closing Date. In addition to the aforementioned legal actions, we are party to a dispute relating to a contract termination. The other party to the contract has filed a demand for arbitration alleging, among other things, that Olin breached the related agreement and claimed damages in excess of the amount Olin believes it is obligated for under the contract. Any additional losses related to this contract dispute are not currently estimable because of unresolved questions of fact and law but, if resolved unfavorably to Olin, they could have a material effect on our financial results. During the ordinary course of our business, contingencies arise resulting from an existing condition, situation or set of circumstances involving an uncertainty as to the realization of a possible gain contingency. In certain instances such as environmental projects, we are responsible for managing the cleanup and remediation of an environmental site. There exists the possibility of recovering a portion of these costs from other parties. We account for gain contingencies in accordance with the provisions of ASC 450 “Contingencies” (ASC 450) and, therefore, do not record gain contingencies and recognize income until it is earned and realizable. For the six months ended June 30, 2016 , we recognized an insurance recovery of $11.0 million in other operating income (expense) for property damage and business interruption related to a 2008 chlor alkali facility incident.

SHAREHOLDERS' EQUITY

SHAREHOLDERS' EQUITY	6 Months Ended
	Jun. 30, 2017
Stockholders' Equity Note [Abstract]
SHAREHOLDERS' EQUITY	SHAREHOLDERS’ EQUITY On April 24, 2014, our board of directors authorized a share repurchase program for up to 8 million shares of common stock that terminated on April 24, 2017. For the six months ended June 30, 2017 and 2016 , no shares were purchased and retired. We purchased a total of 1.9 million shares under the April 2014 program, and the 6.1 million shares that remained authorized to be purchased have expired. Related to the Acquisition, for a period of two years subsequent to the Closing Date, we are subject to certain restrictions on our ability to conduct share repurchases. We issued 0.9 million shares and less than 0.1 million shares representing stock options exercised for the six months ended June 30, 2017 and 2016 , respectively, with a total value of $15.8 million and $0.2 million , respectively. The following table represents the activity included in accumulated other comprehensive loss: Foreign Currency Translation Adjustment (net of taxes) Unrealized Gains (Losses) on Derivative Contracts (net of taxes) Pension and Postretirement Benefits (net of taxes) Accumulated Other Comprehensive Loss ($ in millions) Balance at January 1, 2016 $ (12.1 ) $ (6.9 ) $ (473.5 ) $ (492.5 ) Unrealized gains (losses): First quarter 24.0 1.1 — 25.1 Second quarter (14.3 ) (4.6 ) — (18.9 ) Reclassification adjustments into income: First quarter — 3.7 6.1 9.8 Second quarter — 1.7 5.9 7.6 Tax (provision) benefit: First quarter (8.5 ) (1.8 ) (2.3 ) (12.6 ) Second quarter 3.5 1.1 (2.4 ) 2.2 Net Change 4.7 1.2 7.3 13.2 Balance at June 30, 2016 $ (7.4 ) $ (5.7 ) $ (466.2 ) $ (479.3 ) Balance at January 1, 2017 $ (24.1 ) $ 12.8 $ (498.7 ) $ (510.0 ) Unrealized gains (losses): First quarter 8.3 (3.1 ) — 5.2 Second quarter 28.1 (3.7 ) — 24.4 Reclassification adjustments into income: First quarter — (0.1 ) 6.6 6.5 Second quarter — (2.3 ) 6.8 4.5 Tax (provision) benefit: First quarter (2.3 ) 1.2 (2.7 ) (3.8 ) Second quarter (12.2 ) 2.3 (2.3 ) (12.2 ) Net Change 21.9 (5.7 ) 8.4 24.6 Balance at June 30, 2017 $ (2.2 ) $ 7.1 $ (490.3 ) $ (485.4 ) Net (loss) income and cost of goods sold included reclassification adjustments for realized gains and losses on derivative contracts from accumulated other comprehensive loss. Net (loss) income, cost of goods sold and selling and administrative expenses included the amortization of prior service costs and actuarial losses from accumulated other comprehensive loss. This amortization is recognized equally in cost of goods sold and selling and administrative expenses.

SEGMENT INFORMATION

SEGMENT INFORMATION	6 Months Ended
	Jun. 30, 2017
Segment Reporting [Abstract]
SEGMENT INFORMATION	SEGMENT INFORMATION We define segment results as income (loss) before interest expense, interest income, other operating income (expense), and income taxes, and include the operating results of non-consolidated affiliates. Consistent with the guidance in ASC 280 “Segment Reporting” (ASC 280), we have determined it is appropriate to include the operating results of non-consolidated affiliates in the relevant segment financial results. We have three operating segments: Chlor Alkali Products and Vinyls, Epoxy and Winchester. The three operating segments reflect the organization used by our management for purposes of allocating resources and assessing performance. Chlorine used in our Epoxy segment is transferred at cost from the Chlor Alkali Products and Vinyls segment. Sales and profits are recognized in the Chlor Alkali Products and Vinyls segment for all caustic soda generated and sold by Olin. Three Months Ended Six Months Ended 2017 2016 2017 2016 Sales: ($ in millions) Chlor Alkali Products and Vinyls $ 865.1 $ 733.0 $ 1,702.0 $ 1,437.3 Epoxy 492.0 450.0 1,059.6 910.2 Winchester 169.4 181.0 332.0 364.7 Total sales $ 1,526.5 $ 1,364.0 $ 3,093.6 $ 2,712.2 Income (loss) before taxes: Chlor Alkali Products and Vinyls $ 52.8 $ 30.7 $ 140.3 $ 98.8 Epoxy (8.1 ) — (9.3 ) 8.2 Winchester 19.0 31.2 44.1 59.9 Corporate/other: Pension income 10.7 12.6 21.0 24.8 Environmental expense (1.8 ) (2.4 ) (4.4 ) (5.1 ) Other corporate and unallocated costs (29.7 ) (23.9 ) (63.1 ) (53.5 ) Restructuring charges (8.5 ) (8.2 ) (16.7 ) (101.0 ) Acquisition-related costs (4.4 ) (16.3 ) (11.4 ) (26.5 ) Other operating income (expense) 0.3 (0.2 ) (0.1 ) 10.7 Interest expense (52.5 ) (47.6 ) (104.9 ) (96.1 ) Interest income 0.4 0.5 0.6 0.8 Loss before taxes $ (21.8 ) $ (23.6 ) $ (3.9 ) $ (79.0 )

STOCK-BASED COMPENSATION

STOCK-BASED COMPENSATION	6 Months Ended
	Jun. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [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 expense was as follows: Three Months Ended Six Months Ended 2017 2016 2017 2016 ($ in millions) Stock-based compensation $ 4.2 $ 1.6 $ 11.5 $ 6.0 Mark-to-market adjustments (1.3 ) 2.0 1.3 2.4 Total expense $ 2.9 $ 3.6 $ 12.8 $ 8.4 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 2017 2016 Dividend yield 2.69 % 6.09 % Risk-free interest rate 2.06 % 1.35 % Expected volatility 34 % 32 % Expected life (years) 6.0 6.0 Weighted-average grant fair value (per option) $ 7.78 $ 1.90 Weighted-average exercise price $ 29.75 $ 13.14 Shares granted 1,572,000 1,670,400 Dividend yield for 2017 and 2016 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.

DEBT

DEBT	6 Months Ended
	Jun. 30, 2017
Debt Instruments [Abstract]
DEBT	DEBT On March 9, 2017, we entered into a new five-year $1,975.0 million senior credit facility, which amended and restated the existing $1,850.0 million senior credit facility (the Senior Credit Facility). Pursuant to the agreement, the aggregate principal amount under the term loan facility was increased to $1,375.0 million (Term Loan Facility), and the aggregate commitments under the senior revolving credit facility were increased to $600.0 million (Senior Revolving Credit Facility and, together with the Term Loan Facility, the Amended Senior Credit Facility), from $500.0 million . In March 2017, we drew the entire $1,375.0 million term loan and used the proceeds to redeem the remaining balance of the existing Senior Credit Facility and a portion of the Sumitomo Credit Facility. The maturity date for the Amended Senior Credit Facility was extended from October 5, 2020 to March 9, 2022. The $600.0 million Senior Revolving Credit Facility includes a $100.0 million letter of credit subfacility. The Term Loan Facility includes amortization payable in equal quarterly installments at a rate of 5.0% per annum for the first two years, increasing to 7.5% per annum for the following year and to 10.0% per annum for the last two years. Under the Amended Senior Credit Facility, we may select various floating rate borrowing options. The actual interest rate paid on borrowings under the Amended Senior Credit Facility is based on a pricing grid which is dependent upon the leverage ratio as calculated under the terms of the applicable 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. We were in compliance with all covenants and restrictions under all our outstanding credit agreements as of June 30, 2017 , 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 June 30, 2017 , as a result of our restrictive covenant related to the leverage ratio, the maximum additional borrowings available to us were $547.1 million . This limitation would restrict our ability to borrow the maximum amounts available under the Senior Revolving Credit Facility and the Receivables Financing Agreement. As of June 30, 2017 , there were no other covenants or other restrictions that would have limited our ability to borrow. On March 9, 2017, Olin issued $500.0 million aggregate principal amount of 5.125% senior notes due September 15, 2027 (2027 Notes), which were registered under the Securities Act of 1933, as amended. Interest on the 2027 Notes began accruing from March 9, 2017 and is paid semi-annually beginning on September 15, 2017. Proceeds from the 2027 Notes were used to redeem the remaining balance of the Sumitomo Credit Facility. For the six months ended June 30, 2017 , we recognized interest expense of $2.7 million for the write-off of unamortized deferred debt issuance costs related to these actions. For the six months ended June 30, 2017 , we paid debt issuance costs of $11.2 million relating to the Amended Senior Credit Facility and the 2027 Notes.

CONTRIBUTING EMPLOYEE OWNERSHIP

CONTRIBUTING EMPLOYEE OWNERSHIP PLAN	6 Months Ended
	Jun. 30, 2017
Defined Contribution Plan [Abstract]
CONTRIBUTING EMPLOYEE OWNERSHIP PLAN	CONTRIBUTING EMPLOYEE OWNERSHIP PLAN The Contributing Employee Ownership Plan (CEOP) is a defined contribution plan available to essentially all domestic employees. We provide a contribution to an individual retirement contribution account maintained with the CEOP equal to an amount of between 5% and 10% of the employee’s eligible compensation. The defined contribution plan expense for the three months ended June 30, 2017 and 2016 was $6.0 million and $6.7 million , respectively, and for the six months ended June 30, 2017 and 2016 was $12.6 million and $13.3 million , respectively. Company matching contributions are invested in the same investment allocation as the employee’s contribution. Our matching contributions for eligible employees for the three months ended June 30, 2017 and 2016 were $2.5 million and $2.9 million , respectively, and for the six months ended June 30, 2017 and 2016 were $5.2 million and $5.6 million , respectively.

PENSION PLANS AND RETIREMENT BE

PENSION PLANS AND RETIREMENT BENEFITS	6 Months Ended
	Jun. 30, 2017
Retirement Benefits [Abstract]
PENSION PLANS AND RETIREMENT BENEFITS	PENSION PLANS AND RETIREMENT BENEFITS We sponsor domestic and foreign defined benefit pension plans for eligible employees and retirees. Most of our domestic employees participate in defined contribution plans. However, a portion of our bargaining hourly employees continue to participate in our domestic qualified defined benefit pension plans under a flat-benefit formula. Our funding policy for the qualified defined benefit pension plans is consistent with the requirements of federal laws and regulations. Our foreign subsidiaries maintain pension and other benefit plans, which are consistent with statutory practices. Our domestic qualified defined benefit pension plan provides that if, within three years following a change of control of Olin, any corporate action is taken or filing made in contemplation of, among other things, a plan termination or merger or other transfer of assets or liabilities of the plan, and such termination, merger, or transfer thereafter takes place, plan benefits would automatically be increased for affected participants (and retired participants) to absorb any plan surplus (subject to applicable collective bargaining requirements). We also provide certain postretirement healthcare (medical) and life insurance benefits for eligible active and retired domestic employees. The healthcare plans are contributory with participants’ contributions adjusted annually based on medical rates of inflation and plan experience. Pension Benefits Other Postretirement Three Months Ended Three Months Ended 2017 2016 2017 2016 Components of Net Periodic Benefit (Income) Cost ($ in millions) Service cost $ 4.1 $ 2.7 $ 0.3 $ 0.4 Interest cost 21.5 21.8 0.4 0.4 Expected return on plans’ assets (39.3 ) (39.1 ) — — Amortization of prior service cost — 0.1 (0.7 ) — Recognized actuarial loss 6.8 5.0 0.7 0.8 Net periodic benefit (income) cost $ (6.9 ) $ (9.5 ) $ 0.7 $ 1.6 Pension Benefits Other Postretirement Six Months Ended Six Months Ended 2017 2016 2017 2016 Components of Net Periodic Benefit (Income) Cost ($ in millions) Service cost $ 8.4 $ 5.9 $ 0.6 $ 0.7 Interest cost 43.2 44.2 0.8 0.9 Expected return on plans’ assets (78.4 ) (78.9 ) — — Amortization of prior service cost — 0.1 (1.3 ) — Recognized actuarial loss 13.4 10.3 1.3 1.6 Net periodic benefit (income) cost $ (13.4 ) $ (18.4 ) $ 1.4 $ 3.2 We made cash contributions to our international qualified defined benefit pension plans of $0.9 million and $0.7 million for the six months ended June 30, 2017 and 2016 , respectively.

INCOME TAXES

INCOME TAXES	6 Months Ended
	Jun. 30, 2017
Income Tax Disclosure [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 35.0% to income before taxes. Three Months Ended Six Months Ended Effective Tax Rate Reconciliation (Percent) 2017 2016 2017 2016 Statutory federal tax rate 35.0 % 35.0 % 35.0 % 35.0 % Salt depletion (9.6 ) 40.1 (10.2 ) 9.6 Stock-based compensation 3.9 — 61.0 — Foreign rate differential (3.2 ) 14.0 (3.7 ) 1.5 U.S. tax on foreign earnings 3.2 (13.7 ) 3.7 (1.4 ) Dividends paid to CEOP (0.4 ) 3.4 (0.4 ) 0.6 State income taxes, net 0.4 21.8 (0.3 ) 5.6 Change in valuation allowance — (1.0 ) — (0.3 ) Change in tax contingencies 45.7 (20.6 ) 251.3 (5.1 ) Return to provision (2.3 ) 18.9 (42.6 ) 5.7 Other, net 0.2 (2.1 ) (1.5 ) (0.4 ) Effective tax rate 72.9 % 95.8 % 292.3 % 50.8 % Under ASC 740 “Income Taxes” (ASC 740), companies are required to apply their estimated annual tax rate on a year-to-date basis in each interim period. Under ASC 740, companies should not apply the estimated annual tax rate to interim financial results if the estimated annual tax rate is not reliably predictable. In this situation, the interim tax rate should be based on the actual year-to-date results. Based on the losses for the six months ended June 30, 2016 and the full year pretax projections as of June 30, 2016 , as well as the existence of large favorable permanent book-tax differences for 2016, a reliable projection of our annual effective tax rate as of June 30, 2016 was difficult to determine, producing significant variations in the customary relationship between income tax expense and pretax book income in interim periods, as a small change in forecasted pretax income could cause a significant change in the estimated annual effective tax rate. Consequently, the effective tax rates for the three and six months ended June 30, 2016 were determined based on year-to-date results rather than utilizing the method of calculating an estimated annual effective tax rate which was used up until the period ended March 31, 2016 and for the three and six months ended June 30, 2017 . The year-to-date actual discrete method was applied for the remainder of 2016. The effective tax rates for both the three and six months ended June 30, 2017 included a benefit of $9.5 million related to an agreement reached with the Internal Revenue Service (IRS) for the years 2008, 2010 to 2012 tax examinations and a benefit of $0.9 million and $2.4 million , respectively, associated with stock-based compensation. The effective tax rate for the six months ended June 30, 2017 also included $1.0 million of tax expense associated with prior year tax positions. The effective tax rates for both the the three and six months ended June 30, 2016 included a benefit of $4.5 million associated with a return to provision adjustment for the finalization of our prior years’ U.S. federal and state income tax returns. The June 30, 2016 return to provision adjustment included $14.2 million of benefit primarily associated with a change in estimate related to the calculation of salt depletion and $9.7 million of expense associated with the correction of an immaterial error related to non-deductible acquisition costs. The effective tax rates for the three and six months ended June 30, 2016 also included an expense of $4.9 million and $4.0 million , respectively, related to changes in uncertain tax positions for prior tax years. As of June 30, 2017 , we had $34.3 million of gross unrecognized tax benefits, which would have a net $32.8 million impact on the effective tax rate, if recognized. As of June 30, 2016 , we had $37.5 million of gross unrecognized tax benefits, of which $35.8 million would have impacted the effective tax rate, if recognized. The amount of unrecognized tax benefits was as follows: June 30, 2017 2016 ($ in millions) Balance at beginning of year $ 38.4 $ 35.1 Increases for prior year tax positions 4.9 5.7 Decreases for prior year tax positions (9.2 ) (1.8 ) Increases for current year tax positions 1.4 0.9 Settlement with taxing authorities (1.0 ) (2.1 ) Reductions due to statute of limitations (0.2 ) (0.3 ) Balance at end of period $ 34.3 $ 37.5 In May 2017, we reached an agreement in principle with the IRS regarding their examination of our U.S. income tax returns for 2008, 2010 to 2012. The settlement resulted in a reduction of income tax expense of $9.5 million related primarily to favorable adjustments in uncertain tax positions for prior tax years. As of June 30, 2017 , we believe it is reasonably possible that our total amount of unrecognized tax benefits will decrease by approximately $1.4 million over the next twelve months. The anticipated reduction primarily relates to settlements with taxing authorities and the expiration of federal, state and foreign statutes of limitation. We operate globally and file income tax returns in numerous jurisdictions. Our tax returns are subject to examination by various federal, state and local tax authorities. None of our U.S. federal income tax returns are currently under examination by the IRS. In connection with the Acquisition, TDCC retained liabilities relating to taxes to the extent arising prior to the Closing Date. We believe we have adequately provided for all tax positions; however, amounts asserted by taxing authorities could be greater than our accrued position. For our primary tax jurisdictions, the tax years that remain subject to examination are as follows: Tax Years U.S. federal income tax 2013 - 2016 U.S. state income tax 2006 - 2016 Canadian federal income tax 2012 - 2016 Brazil 2014 - 2016 Germany 2015 - 2016 China 2014 - 2016 The Netherlands 2014 - 2016 South Korea 2014 - 2016

DERIVATIVE FINANCIAL INSTRUMENT

DERIVATIVE FINANCIAL INSTRUMENTS	6 Months Ended
	Jun. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [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 condensed 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 derivative contracts as cash flow hedges of forecasted purchases of commodities and forecasted interest payments related to variable-rate borrowings and designate certain interest rate swaps as fair value hedges of fixed-rate borrowings. We do not enter into any derivative instruments for trading or speculative purposes. Energy costs, including electricity and natural gas, and certain raw materials used in our production processes are subject to price volatility. Depending on market conditions, we may enter into futures contracts, forward contracts, commodity swaps and put and call option contracts in order to reduce the impact of commodity price fluctuations. The majority of our commodity derivatives expire within one year. Those commodity contracts that extend beyond one year correspond with raw material purchases for long-term fixed-price sales contracts. Olin actively manages currency exposures that are associated with net monetary asset positions, currency purchases and sales commitments denominated in foreign currencies and foreign currency denominated assets and liabilities created in the normal course of business. We enter into forward sales and purchase contracts to manage currency risk to offset our net exposures, by currency, related to the foreign currency denominated monetary assets and liabilities of our operations. At June 30, 2017 , we had outstanding forward contracts to buy foreign currency with a notional value of $71.8 million and to sell foreign currency with a notional value of $90.4 million . All of the currency derivatives expire within one year and are for U.S. dollar (USD) equivalents. The counterparties to the forward contracts are large financial institutions; however, the risk of loss to us in the event of nonperformance by a counterparty could be significant to our financial position or results of operations. At December 31, 2016 , we had outstanding forward contracts to buy foreign currency with a notional value of $73.2 million and to sell foreign currency with a notional value of $100.8 million . At June 30, 2016 , we had outstanding forward contracts to buy foreign currency with a notional value of $86.5 million and to sell foreign currency with a notional value of $117.7 million . Cash flow hedges ASC 815 requires that all derivative instruments be recorded on the balance sheet at their fair value. For derivative instruments that are designated and qualify as a cash flow hedge, the change in fair value of the derivative is recognized as a component of other comprehensive income (loss) until the hedged item is recognized in earnings. Gains and losses on the derivatives representing hedge ineffectiveness are recognized currently in earnings. We had the following notional amount of outstanding commodity contracts that were entered into to hedge forecasted purchases: June 30, 2017 December 31, 2016 June 30, 2016 ($ in millions) Copper $ 42.8 $ 35.8 $ 38.7 Zinc 7.9 8.0 8.0 Lead — 3.4 8.4 Natural gas 45.0 54.4 0.4 As of June 30, 2017 , the counterparties to these commodity contracts were Wells Fargo Bank, N.A. (Wells Fargo) ( $29.3 million ), Citibank ( $29.8 million ), Merrill Lynch Commodities, Inc. ( $27.4 million ) and JPMorgan Chase Bank, National Association ( $9.2 million ), all of which are major financial institutions. 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 June 30, 2017 , we had open positions in futures contracts through 2022. If all open futures contracts had been settled on June 30, 2017 , we would have recognized a pretax gain of $1.9 million . If commodity prices were to remain at June 30, 2017 levels, approximately $0.1 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. In April 2016, we entered into three tranches of forward starting interest rate swaps whereby we agreed to pay fixed rates to the counterparties who, in turn, pay us floating rates on $1,100.0 million , $900.0 million , and $400.0 million of our underlying floating-rate debt obligations. Each tranche’s term length is for twelve months beginning on December 31, 2016, December 31, 2017 and December 31, 2018, respectively. The counterparties to the agreements are SMBC Capital Markets, Inc., Wells Fargo, PNC Bank, National Association and Toronto-Dominion Bank. These counterparties are large financial institutions; however, the risk of loss to us in the event of nonperformance by a counterparty could be significant to our financial position or results of operations. We have designated the swaps as cash flow hedges of the risk of changes in interest payments associated with our variable-rate borrowings. Accordingly, the swap agreements have been recorded at their fair market value of $9.6 million and are included in other current assets and other assets on the accompanying condensed balance sheet as of June 30, 2017 , with the corresponding gain deferred as a component of other comprehensive loss. For both the three and six months ended June 30, 2017 , $0.5 million of income was recorded to interest expense on the accompanying condensed statement of operations related to these swap agreements. No gain or loss has been recorded in earnings as a result of ineffectiveness. We use interest rate swaps as a means of minimizing cash flow fluctuations that may arise from volatility in interest rates of our variable-rate borrowings. These interest rate swaps are treated as cash flow hedges. At June 30, 2017 , we had open interest rate swaps designated as cash flow hedges with maximum terms through 2019. If all open interest rate swap contracts had been settled on June 30, 2017 , we would have recognized a pretax gain of $9.6 million . If interest rates were to remain at June 30, 2017 levels, $3.1 million of deferred gains would be reclassified into earnings during the next twelve months. The actual effect on earnings will be dependent on actual interest rates 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 June 30, 2017 , December 31, 2016 and June 30, 2016 , the total notional amounts of our interest rate swaps designated as fair value hedges were $500.0 million , $500.0 million and $250.0 million , respectively. In April 2016, we entered into interest rate swaps on $250.0 million of our underlying fixed-rate debt obligations, whereby we agreed to pay variable rates to the counterparties who, in turn, pay us fixed rates. The counterparties to these agreements are Toronto-Dominion Bank and SMBC Capital Markets, Inc., both of which are major financial institutions. In October 2016, we entered into interest rate swaps on an additional $250.0 million of our underlying fixed-rate debt obligations, whereby we agreed to pay variable rates to the counterparties who, in turn, pay us fixed rates. The counterparties to these agreements are PNC Bank, National Association and Wells Fargo, both of which are major financial institutions. We have designated the April 2016 and October 2016 interest rate 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 $24.9 million and are included in other long-term liabilities on the accompanying condensed balance sheet as of June 30, 2017 , with a corresponding decrease in the carrying amount of the related debt. For the three months ended June 30, 2017 and 2016 , $0.7 million and $0.5 million , respectively, and for the six months ended June 30, 2017 and 2016 , $1.9 million and $0.5 million , respectively, of income was recorded to interest expense on the accompanying condensed statement of operations related to these swap agreements. No gain or loss has been recorded in earnings as a result of ineffectiveness. In June 2012, we terminated $73.1 million of interest rate swaps with Wells Fargo that had been entered into on the SunBelt Notes in May 2011. The result was a gain of $2.2 million , which will be recognized through 2017. As of June 30, 2017 , $0.1 million of this gain was included in current installments of long-term debt. We use interest rate swaps as a means of managing interest expense and floating interest rate exposure to optimal levels. These interest rate swaps are treated as fair value hedges. The accounting for gains and losses associated with changes in fair value of the derivative and the effect on the condensed financial statements will depend on the hedge designation and whether the hedge is effective in offsetting changes in fair value of cash flows of the asset or liability being hedged. Financial statement impacts We present our derivative assets and liabilities in our condensed balance sheets on a net basis whenever we have a legally enforceable master netting agreement with the counterparty to our derivative contracts. We use these agreements to manage and substantially reduce our potential counterparty credit risk. The following table summarizes the location and fair value of the derivative instruments on our condensed balance sheets. The table disaggregates our net derivative assets and liabilities into gross components on a contract-by-contract basis before giving effect to master netting arrangements: Asset Derivatives Liability Derivatives Fair Value Fair Value Balance Sheet Location June 30, 2017 December 31, 2016 June 30, 2016 Balance Sheet Location June 30, 2017 December 31, 2016 June 30, 2016 ($ in millions) ($ in millions) Derivatives Designated as Hedging Instruments Interest rate contracts Other current assets $ 5.0 $ 1.9 $ — Current installments of long-term debt $ 0.1 $ 0.1 $ — Interest rate contracts Other assets 4.6 7.7 — Long-term debt — — 0.3 Interest rate contracts Other assets — — 3.7 Other liabilities 24.9 28.5 6.2 Commodity contracts – gains Other current assets 4.9 13.2 — Accrued liabilities (0.1 ) — (1.8 ) Commodity contracts – losses Other current assets (0.9 ) (1.7 ) — Accrued liabilities 2.3 — 4.9 $ 13.6 $ 21.1 $ 3.7 $ 27.2 $ 28.6 $ 9.6 Derivatives Not Designated as Hedging Instruments Foreign exchange contracts – gains Other current assets $ 1.7 $ 0.6 $ 0.1 Accrued liabilities $ — $ (0.5 ) $ (0.7 ) Foreign exchange contracts – losses Other current assets (0.5 ) (0.5 ) — Accrued liabilities — 1.7 2.8 $ 1.2 $ 0.1 $ 0.1 $ — $ 1.2 $ 2.1 Total derivatives (1) $ 14.8 $ 21.2 $ 3.8 $ 27.2 $ 29.8 $ 11.7 (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 Six Months Ended Location of Gain (Loss) 2017 2016 2017 2016 Derivatives – Cash Flow Hedges ($ in millions) Recognized in other comprehensive income (loss) (effective portion): Commodity contracts ——— $ (2.4 ) $ 1.6 $ (7.4 ) $ 2.7 Interest rate contracts ——— (1.3 ) (6.2 ) 0.6 (6.2 ) $ (3.7 ) $ (4.6 ) $ (6.8 ) $ (3.5 ) Reclassified from accumulated other comprehensive loss into income (effective portion): Interest rate contracts Interest expense $ 0.5 $ — $ 0.5 $ — Commodity contracts Cost of goods sold 1.8 (1.7 ) 1.9 (5.4 ) $ 2.3 $ (1.7 ) $ 2.4 $ (5.4 ) Derivatives – Fair Value Hedges Interest rate contracts Interest expense $ 0.8 $ 1.2 $ 2.0 $ 1.9 Derivatives Not Designated as Hedging Instruments Commodity contracts Cost of goods sold $ — $ — $ — $ (0.4 ) Foreign exchange contracts Selling and administration 5.0 (4.2 ) 0.5 (7.3 ) $ 5.0 $ (4.2 ) $ 0.5 $ (7.7 ) The ineffective portion of changes in fair value resulted in zero charged or credited to earnings for the three and six months ended June 30, 2017 and 2016 . 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 nonperformance by the counterparties. Based on the agreements with our various counterparties, cash collateral is required to be provided when the net fair value of the derivatives, with the counterparty, exceeds a specific threshold. If the threshold is exceeded, cash is either provided by the counterparty to us if the value of the derivatives is our asset, or cash is provided by us to the counterparty if the value of the derivatives is our liability. As of June 30, 2017 , December 31, 2016 and June 30, 2016 , this threshold was not exceeded. In all instances where we are party to a master netting agreement, we offset the receivable or payable recognized upon payment of cash collateral against the fair value amounts recognized for derivative instruments that have also been offset under such master netting agreements.

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS	6 Months Ended
	Jun. 30, 2017
Fair Value Disclosures [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) are directly related to the amount of subjectivity associated with the inputs to fair valuation of these assets and liabilities, and are as follows: Level 1 — Inputs were unadjusted, quoted prices in active markets for identical assets or liabilities at the measurement date. Level 2 — Inputs (other than quoted prices included in Level 1) were either directly or indirectly observable for the asset or liability through correlation with market data at the measurement date and for the duration of the instruments’ anticipated life. Level 3 — Inputs reflected management’s best estimate of what market participants would use in pricing the asset or liability at the measurement date. Consideration was given to the risk inherent in the valuation technique and the risk inherent in the inputs to the model. We are required to separately disclose assets and liabilities measured at fair value on a recurring basis, from those measured at fair value on a nonrecurring basis. Nonfinancial assets measured at fair value on a nonrecurring basis are intangible assets and goodwill, which are reviewed for impairment annually in the fourth quarter and/or when circumstances or other events indicate that impairment may have occurred. Determining which hierarchical level an asset or liability falls within requires significant judgment. We evaluate our hierarchy disclosures each quarter. The following table summarizes the assets and liabilities measured at fair value in the condensed balance sheets: Fair Value Measurements Balance at June 30, 2017 Level 1 Level 2 Level 3 Total Assets ($ in millions) Interest rate swaps $ — $ 9.6 $ — $ 9.6 Commodity contracts — 4.0 — 4.0 Foreign exchange contracts — 1.2 — 1.2 Liabilities Interest rate swaps $ — $ 25.0 $ — $ 25.0 Commodity contracts — 2.2 — 2.2 Balance at December 31, 2016 Assets Interest rate swaps $ — $ 9.6 $ — $ 9.6 Commodity contracts — 11.5 — 11.5 Foreign exchange contracts — 0.1 — 0.1 Liabilities Interest rate swaps $ — $ 28.6 $ — $ 28.6 Foreign exchange contracts — 1.2 — 1.2 Balance at June 30, 2016 Assets Interest rate swaps $ — $ 3.7 $ — $ 3.7 Foreign exchange contracts — 0.1 — 0.1 Liabilities Interest rate swaps $ — $ 6.5 $ — $ 6.5 Commodity contracts — 3.1 — 3.1 Foreign exchange contracts — 2.1 — 2.1 For the six months ended June 30, 2017 , there were no transfers into or out of Level 1, Level 2 or Level 3. Interest Rate Swaps Interest rate swap 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 Commodity contract financial instruments were valued primarily based on prices and other relevant information observable in market transactions involving identical or comparable assets or liabilities including both forward and spot prices for commodities. We use commodity derivative contracts for certain raw materials and energy costs such as copper, zinc, lead, electricity and natural gas to provide a measure of stability in managing our exposure to price fluctuations. Foreign Currency Contracts Foreign currency contract financial instruments were valued primarily based on relevant information observable in market transactions involving identical or comparable assets or liabilities including both forward and spot prices for currencies. We enter into forward sales and purchase contracts to manage currency risk resulting from purchase and sale commitments denominated in foreign currencies. Financial Instruments The carrying values of cash and cash equivalents, 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. The following table summarizes the fair value measurements of debt and the actual debt recorded on our condensed balance sheets: Fair Value Measurements Amount recorded Level 1 Level 2 Level 3 Total ($ in millions) Balance at June 30, 2017 $ — $ 3,777.8 $ 153.0 $ 3,930.8 $ 3,600.6 Balance at December 31, 2016 — 3,703.7 153.0 3,856.7 3,617.6 Balance at June 30, 2016 — 3,740.3 153.0 3,893.3 3,695.8 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 June 30, 2017 , December 31, 2016 and June 30, 2016 .

SUPPLEMENTAL GUARANTOR FINANCIA

SUPPLEMENTAL GUARANTOR FINANCIAL INFORMATION	6 Months Ended
	Jun. 30, 2017
Supplemental Guarantor Financial Information [Abstract]
SUPPLEMENTAL GUARANTOR FINANCIAL INFORMATION	SUPPLEMENTAL GUARANTOR FINANCIAL INFORMATION In October 2015, Blue Cube Spinco Inc. (the Issuer) issued $720.0 million aggregate principal amount of 9.75% senior notes due October 15, 2023 (2023 Notes) and $500.0 million aggregate principal amount of 10.00% senior notes due October 15, 2025 (2025 Notes and, together with the 2023 Notes, the Notes). During 2016, the Notes were registered under the Securities Act of 1933, as amended. The Issuer was formed on March 13, 2015 as a wholly owned subsidiary of TDCC and upon closing of the Acquisition became a 100% owned subsidiary of Olin (the Parent Guarantor). The Exchange Notes are fully and unconditionally guaranteed by the Parent Guarantor. The following condensed consolidating financial information presents the condensed consolidating balance sheets as of June 30, 2017 , December 31, 2016 and June 30, 2016 , the related condensed consolidating statements of operations and comprehensive income for each of the three and six months ended June 30, 2017 and 2016 , and the related statements of cash flows for the six months ended June 30, 2017 and 2016 , of (a) the Parent Guarantor, (b) the Issuer, (c) the non-guarantor subsidiaries, (d) elimination entries necessary to consolidate the Parent Guarantor with the Issuer and the non-guarantor subsidiaries and (e) Olin on a consolidated basis. Investments in consolidated subsidiaries are presented under the equity method of accounting. CONDENSED CONSOLIDATING BALANCE SHEETS June 30, 2017 (In millions) (Unaudited) Parent Guarantor Issuer Subsidiary Eliminations Total Assets Current assets: Cash and cash equivalents $ 28.9 $ — $ 155.6 $ — $ 184.5 Receivables, net 101.7 — 680.5 — 782.2 Intercompany receivables — 2.9 2,052.9 (2,055.8 ) — Income taxes receivable 18.8 — 7.2 (5.1 ) 20.9 Inventories 178.2 — 488.0 — 666.2 Other current assets 183.1 — 7.0 (152.9 ) 37.2 Total current assets 510.7 2.9 3,391.2 (2,213.8 ) 1,691.0 Property, plant and equipment, net 509.1 — 3,118.3 — 3,627.4 Investment in subsidiaries 6,082.7 3,774.0 — (9,856.7 ) — Deferred income taxes 151.8 — 97.8 (124.4 ) 125.2 Other assets 46.9 — 578.7 — 625.6 Long-term receivables—affiliates — 2,204.3 — (2,204.3 ) — Intangible assets, net 0.4 5.7 599.5 — 605.6 Goodwill — 966.3 1,153.2 — 2,119.5 Total assets $ 7,301.6 $ 6,953.2 $ 8,938.7 $ (14,399.2 ) $ 8,794.3 Liabilities and Shareholders' Equity Current liabilities: Current installments of long-term debt $ 0.8 $ 68.8 $ 12.1 $ — $ 81.7 Accounts payable 58.0 — 603.7 (5.6 ) 656.1 Intercompany payables 2,055.8 — — (2,055.8 ) — Income taxes payable — — 12.2 (5.1 ) 7.1 Accrued liabilities 116.1 — 296.6 (151.2 ) 261.5 Total current liabilities 2,230.7 68.8 924.6 (2,217.7 ) 1,006.4 Long-term debt 822.3 2,487.4 209.2 — 3,518.9 Accrued pension liability 421.7 — 203.9 — 625.6 Deferred income taxes — 237.9 924.1 (124.4 ) 1,037.6 Long-term payables—affiliates 1,284.4 — 919.9 (2,204.3 ) — Other liabilities 283.9 8.1 55.2 — 347.2 Total liabilities 5,043.0 2,802.2 3,236.9 (4,546.4 ) 6,535.7 Commitments and contingencies Shareholders' equity: Common stock 166.3 — 14.6 (14.6 ) 166.3 Additional paid-in capital 2,262.7 4,125.7 4,808.2 (8,933.9 ) 2,262.7 Accumulated other comprehensive loss (485.4 ) — (8.6 ) 8.6 (485.4 ) Retained earnings 315.0 25.3 887.6 (912.9 ) 315.0 Total shareholders' equity 2,258.6 4,151.0 5,701.8 (9,852.8 ) 2,258.6 Total liabilities and shareholders' equity $ 7,301.6 $ 6,953.2 $ 8,938.7 $ (14,399.2 ) $ 8,794.3 CONDENSED CONSOLIDATING BALANCE SHEETS December 31, 2016 (In millions) (Unaudited) Parent Guarantor Issuer Subsidiary Eliminations Total Assets Current assets: Cash and cash equivalents $ 25.2 $ — $ 159.3 $ — $ 184.5 Receivables, net 88.3 — 586.7 — 675.0 Intercompany receivables — — 1,912.3 (1,912.3 ) — Income taxes receivable 19.0 — 7.3 (0.8 ) 25.5 Inventories 167.7 — 462.7 — 630.4 Other current assets 164.7 3.4 1.2 (138.5 ) 30.8 Total current assets 464.9 3.4 3,129.5 (2,051.6 ) 1,546.2 Property, plant and equipment, net 510.1 — 3,194.8 — 3,704.9 Investment in subsidiaries 6,035.2 3,734.7 — (9,769.9 ) — Deferred income taxes 133.5 — 103.5 (117.5 ) 119.5 Other assets 48.1 — 596.3 — 644.4 Long-term receivables—affiliates — 2,194.2 — (2,194.2 ) — Intangible assets, net 0.4 5.7 623.5 — 629.6 Goodwill — 966.3 1,151.7 — 2,118.0 Total assets $ 7,192.2 $ 6,904.3 $ 8,799.3 $ (14,133.2 ) $ 8,762.6 Liabilities and Shareholders' Equity Current liabilities: Current installments of long-term debt $ 0.6 $ 67.5 $ 12.4 $ — $ 80.5 Accounts payable 45.3 — 527.4 (1.9 ) 570.8 Intercompany payables 1,882.8 29.5 — (1,912.3 ) — Income taxes payable — — 8.3 (0.8 ) 7.5 Accrued liabilities 124.9 — 277.5 (138.6 ) 263.8 Total current liabilities 2,053.6 97.0 825.6 (2,053.6 ) 922.6 Long-term debt 913.9 2,413.3 209.9 — 3,537.1 Accrued pension liability 453.7 — 184.4 — 638.1 Deferred income taxes — 223.6 926.4 (117.5 ) 1,032.5 Long-term payables—affiliates 1,209.1 — 985.1 (2,194.2 ) — Other liabilities 288.9 6.6 63.8 — 359.3 Total liabilities 4,919.2 2,740.5 3,195.2 (4,365.3 ) 6,489.6 Commitments and contingencies Shareholders' equity: Common stock 165.4 — 14.6 (14.6 ) 165.4 Additional paid-in capital 2,243.8 4,125.7 4,808.2 (8,933.9 ) 2,243.8 Accumulated other comprehensive loss (510.0 ) — (7.0 ) 7.0 (510.0 ) Retained earnings 373.8 38.1 788.3 (826.4 ) 373.8 Total shareholders' equity 2,273.0 4,163.8 5,604.1 (9,767.9 ) 2,273.0 Total liabilities and shareholders' equity $ 7,192.2 $ 6,904.3 $ 8,799.3 $ (14,133.2 ) $ 8,762.6 CONDENSED CONSOLIDATING BALANCE SHEETS June 30, 2016 (In millions) (Unaudited) Parent Guarantor Issuer Subsidiary Eliminations Total Assets Current assets: Cash and cash equivalents $ 23.2 $ — $ 43.4 $ — $ 66.6 Receivables, net 98.2 — 692.3 — 790.5 Intercompany receivables — 22.3 1,712.1 (1,734.4 ) — Income taxes receivable 35.1 — 10.7 — 45.8 Inventories 175.2 — 461.0 — 636.2 Other current assets 146.1 — 5.4 (127.7 ) 23.8 Total current assets 477.8 22.3 2,924.9 (1,862.1 ) 1,562.9 Property, plant and equipment, net 494.7 — 3,298.6 — 3,793.3 Investment in subsidiaries 5,957.3 3,655.0 — (9,612.3 ) — Deferred income taxes 166.2 — 88.5 (147.7 ) 107.0 Other assets 40.4 — 548.2 — 588.6 Long-term receivables—affiliates — 2,262.4 — (2,262.4 ) — Intangible assets, net 0.5 5.7 665.0 — 671.2 Goodwill — 994.2 1,192.1 — 2,186.3 Total assets $ 7,136.9 $ 6,939.6 $ 8,717.3 $ (13,884.5 ) $ 8,909.3 Liabilities and Shareholders' Equity Current liabilities: Current installments of long-term debt $ 0.6 $ 67.5 $ 12.2 $ — $ 80.3 Accounts payable 59.8 — 476.6 — 536.4 Intercompany payables 1,734.4 — — (1,734.4 ) — Income taxes payable 0.6 — 7.6 — 8.2 Accrued liabilities 133.4 — 287.9 (127.7 ) 293.6 Total current liabilities 1,928.8 67.5 784.3 (1,862.1 ) 918.5 Long-term debt 1,158.3 2,444.8 12.4 — 3,615.5 Accrued pension liability 164.1 — 452.6 — 616.7 Deferred income taxes — 294.7 932.3 (147.7 ) 1,079.3 Long-term payables—affiliates 1,277.3 — 985.1 (2,262.4 ) — Other liabilities 277.4 — 70.9 — 348.3 Total liabilities 4,805.9 2,807.0 3,237.6 (4,272.2 ) 6,578.3 Commitments and contingencies Shareholders' equity: Common stock 165.2 — 15.1 (15.1 ) 165.2 Additional paid-in capital 2,240.3 4,125.7 4,756.4 (8,882.1 ) 2,240.3 Accumulated other comprehensive loss (479.3 ) — (21.1 ) 21.1 (479.3 ) Retained earnings 404.8 6.9 729.3 (736.2 ) 404.8 Total shareholders' equity 2,331.0 4,132.6 5,479.7 (9,612.3 ) 2,331.0 Total liabilities and shareholders' equity $ 7,136.9 $ 6,939.6 $ 8,717.3 $ (13,884.5 ) $ 8,909.3 CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Six Months Ended June 30, 2017 (In millions) (Unaudited) Parent Guarantor Issuer Subsidiary Eliminations Total Sales $ 652.9 $ — $ 2,655.1 $ (214.4 ) $ 3,093.6 Operating expenses: Cost of goods sold 569.5 — 2,442.7 (214.4 ) 2,797.8 Selling and administration 68.6 — 99.6 — 168.2 Restructuring charges — — 16.7 — 16.7 Acquisition-related costs 11.4 — — — 11.4 Other operating (expense) income (4.5 ) — 4.4 — (0.1 ) Operating (loss) income (1.1 ) — 100.5 — 99.4 Earnings of non-consolidated affiliates 1.0 — — — 1.0 Equity income (loss) in subsidiaries 18.4 39.3 — (57.7 ) — Interest expense 21.4 82.8 4.0 (3.3 ) 104.9 Interest income 3.0 — 0.9 (3.3 ) 0.6 Income (loss) before taxes (0.1 ) (43.5 ) 97.4 (57.7 ) (3.9 ) Income tax (benefit) provision (7.6 ) (30.7 ) 26.9 — (11.4 ) Net income (loss) $ 7.5 $ (12.8 ) $ 70.5 $ (57.7 ) $ 7.5 CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Three Months Ended June 30, 2017 (In millions) (Unaudited) Parent Guarantor Issuer Subsidiary Eliminations Total Sales $ 338.1 $ — $ 1,294.7 $ (106.3 ) $ 1,526.5 Operating expenses: Cost of goods sold 294.7 — 1,215.7 (106.3 ) 1,404.1 Selling and administration 27.5 — 52.5 — 80.0 Restructuring charges — — 8.5 — 8.5 Acquisition-related costs 4.4 — — — 4.4 Other operating (expense) income (4.0 ) — 4.3 — 0.3 Operating income 7.5 — 22.3 — 29.8 Earnings of non-consolidated affiliates 0.5 — — — 0.5 Equity (loss) income in subsidiaries (7.8 ) 4.2 — 3.6 — Interest expense 9.4 41.9 3.1 (1.9 ) 52.5 Interest income 2.3 — — (1.9 ) 0.4 Income (loss) before taxes (6.9 ) (37.7 ) 19.2 3.6 (21.8 ) Income tax (benefit) provision (1.0 ) (15.5 ) 0.6 — (15.9 ) Net (loss) income $ (5.9 ) $ (22.2 ) $ 18.6 $ 3.6 $ (5.9 ) CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Six Months Ended June 30, 2016 (In millions) (Unaudited) Parent Guarantor Issuer Subsidiary Eliminations Total Sales $ 650.5 $ — $ 2,296.0 $ (234.3 ) $ 2,712.2 Operating expenses: Cost of goods sold 560.7 — 2,085.9 (234.3 ) 2,412.3 Selling and administration 72.8 — 94.6 — 167.4 Restructuring charges 0.6 — 100.4 — 101.0 Acquisition-related costs 25.3 — 1.2 — 26.5 Other operating (expense) income (1.1 ) — 11.8 — 10.7 Operating (loss) income (10.0 ) — 25.7 — 15.7 Earnings of non-consolidated affiliates 0.6 — — — 0.6 Equity (loss) income in subsidiaries (21.2 ) 59.3 — (38.1 ) — Interest expense 21.0 76.0 1.9 (2.8 ) 96.1 Interest income 1.5 — 2.1 (2.8 ) 0.8 Income (loss) before taxes (50.1 ) (16.7 ) 25.9 (38.1 ) (79.0 ) Income tax benefit (11.2 ) (28.2 ) (0.7 ) — (40.1 ) Net (loss) income $ (38.9 ) $ 11.5 $ 26.6 $ (38.1 ) $ (38.9 ) CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Three Months Ended June 30, 2016 (In millions) (Unaudited) Parent Guarantor Issuer Subsidiary Eliminations Total Sales $ 329.8 $ — $ 1,154.7 $ (120.5 ) $ 1,364.0 Operating expenses: Cost of goods sold 285.4 — 1,072.0 (120.5 ) 1,236.9 Selling and administration 36.0 — 43.3 — 79.3 Restructuring charges 0.3 — 7.9 — 8.2 Acquisition-related costs 15.1 — 1.2 — 16.3 Other operating (expense) income (0.6 ) — 0.4 — (0.2 ) Operating (loss) income (7.6 ) — 30.7 — 23.1 Earnings of non-consolidated affiliates 0.4 — — — 0.4 Equity income (loss) in subsidiaries 7.6 15.7 — (23.3 ) — Interest expense 10.3 37.8 0.9 (1.4 ) 47.6 Interest income 0.7 — 1.2 (1.4 ) 0.5 Income (loss) before taxes (9.2 ) (22.1 ) 31.0 (23.3 ) (23.6 ) Income tax (benefit) provision (8.2 ) (14.9 ) 0.5 — (22.6 ) Net (loss) income $ (1.0 ) $ (7.2 ) $ 30.5 $ (23.3 ) $ (1.0 ) CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Six Months Ended June 30, 2017 (In millions) (Unaudited) Parent Guarantor Issuer Subsidiary Eliminations Total Net income (loss) $ 7.5 $ (12.8 ) $ 70.5 $ (57.7 ) $ 7.5 Other comprehensive income, net of tax: Foreign currency translation adjustments, net — — 21.9 — 21.9 Unrealized losses on derivative contracts, net (5.7 ) — — — (5.7 ) Amortization of prior service costs and actuarial losses, net 8.0 — 0.4 — 8.4 Total other comprehensive income, net of tax 2.3 — 22.3 — 24.6 Comprehensive income (loss) $ 9.8 $ (12.8 ) $ 92.8 $ (57.7 ) $ 32.1 CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Three Months Ended June 30, 2017 (In millions) (Unaudited) Parent Guarantor Issuer Subsidiary Eliminations Total Net (loss) income $ (5.9 ) $ (22.2 ) $ 18.6 $ 3.6 $ (5.9 ) Other comprehensive income, net of tax: Foreign currency translation adjustments, net — — 15.9 — 15.9 Unrealized losses on derivative contracts, net (3.7 ) — — — (3.7 ) Amortization of prior service costs and actuarial losses, net 4.3 — 0.2 — 4.5 Total other comprehensive income, net of tax 0.6 — 16.1 — 16.7 Comprehensive (loss) income $ (5.3 ) $ (22.2 ) $ 34.7 $ 3.6 $ 10.8 CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Six Months Ended June 30, 2016 (In millions) (Unaudited) Parent Guarantor Issuer Subsidiary Eliminations Total Net (loss) income $ (38.9 ) $ 11.5 $ 26.6 $ (38.1 ) $ (38.9 ) Other comprehensive income, net of tax: Foreign currency translation adjustments, net — — 4.7 — 4.7 Unrealized gains on derivative contracts, net 1.2 — — — 1.2 Amortization of prior service costs and actuarial losses, net 6.7 — 0.6 — 7.3 Total other comprehensive income, net of tax 7.9 — 5.3 — 13.2 Comprehensive (loss) income $ (31.0 ) $ 11.5 $ 31.9 $ (38.1 ) $ (25.7 ) CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Three Months Ended June 30, 2016 (In millions) (Unaudited) Parent Guarantor Issuer Subsidiary Eliminations Total Net (loss) income $ (1.0 ) $ (7.2 ) $ 30.5 $ (23.3 ) $ (1.0 ) Other comprehensive income (loss), net of tax: Foreign currency translation adjustments, net — — (10.8 ) — (10.8 ) Unrealized losses on derivative contracts, net (1.8 ) — — — (1.8 ) Amortization of prior service costs and actuarial losses, net 3.4 — 0.1 — 3.5 Total other comprehensive income (loss), net of tax 1.6 — (10.7 ) — (9.1 ) Comprehensive income (loss) $ 0.6 $ (7.2 ) $ 19.8 $ (23.3 ) $ (10.1 ) CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Six Months Ended June 30, 2017 (In millions) (Unaudited) Parent Guarantor Issuer Subsidiary Eliminations Total Net operating activities $ 124.4 $ — $ 103.0 $ — $ 227.4 Investing Activities Capital expenditures (43.9 ) — (107.0 ) — (150.9 ) Proceeds from disposition of property, plant and equipment — — 0.1 — 0.1 Net investing activities (43.9 ) — (106.9 ) — (150.8 ) Financing Activities Long-term debt: Borrowings 500.0 1,375.0 — — 1,875.0 Repayments (590.4 ) (1,299.7 ) — — (1,890.1 ) Stock options exercised 15.8 — — — 15.8 Dividends paid (66.3 ) — — — (66.3 ) Debt issuance costs (8.3 ) (2.9 ) — — (11.2 ) Intercompany financing activities 72.4 (72.4 ) — — — Net financing activities (76.8 ) — — — (76.8 ) Effect of exchange rate changes on cash and cash equivalents — — 0.2 — 0.2 Net increase (decrease) in cash and cash equivalents 3.7 — (3.7 ) — — Cash and cash equivalents, beginning of period 25.2 — 159.3 — 184.5 Cash and cash equivalents, end of period $ 28.9 $ — $ 155.6 $ — $ 184.5 CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Six Months Ended June 30, 2016 (In millions) (Unaudited) Parent Guarantor Issuer Subsidiary Eliminations Total Net operating activities $ 305.4 $ — $ (119.2 ) $ — $ 186.2 Investing Activities Capital expenditures (26.8 ) — (110.6 ) — (137.4 ) Business acquired in purchase transaction, net of cash acquired (69.5 ) — — — (69.5 ) Payments under long-term supply contract — — (85.0 ) — (85.0 ) Proceeds from disposition of property, plant and equipment 0.2 — 0.2 — 0.4 Proceeds from disposition of affiliated companies 4.4 — — — 4.4 Net investing activities (91.7 ) — (195.4 ) — (287.1 ) Financing Activities Long-term debt repayments (125.2 ) (33.8 ) — — (159.0 ) Stock options exercised 0.2 — — — 0.2 Dividends paid (66.1 ) — — — (66.1 ) Intercompany financing activities (118.8 ) 33.8 85.0 — — Net financing activities (309.9 ) — 85.0 — (224.9 ) Effect of exchange rate changes on cash and cash equivalents — — 0.4 — 0.4 Net decrease in cash and cash equivalents (96.2 ) — (229.2 ) — (325.4 ) Cash and cash equivalents, beginning of period 119.4 — 272.6 — 392.0 Cash and cash equivalents, end of period $ 23.2 $ — $ 43.4 $ — $ 66.6

RESTRUCTURING CHARGES (Tables)

RESTRUCTURING CHARGES (Tables)	6 Months Ended
	Jun. 30, 2017
Restructuring and Related Activities [Abstract]
Schedule of Restructuring Reserve by Type of Cost	The following table summarizes the 2017 and 2016 activities by major component of these restructuring actions and the remaining balances of accrued restructuring costs as of June 30, 2017 and 2016 : Employee severance and job related benefits Lease and other contract termination costs Employee relocation costs Facility exit costs Write-off of equipment and facility Total ($ in millions) Balance at January 1, 2016 $ 4.6 $ 2.1 $ — $ — $ — $ 6.7 Restructuring charges: First quarter 3.9 9.2 0.2 2.9 76.6 92.8 Second quarter 0.2 — 0.8 7.2 — 8.2 Amounts utilized (3.6 ) (1.3 ) (1.0 ) (7.9 ) (76.6 ) (90.4 ) Currency translation adjustments — 0.1 — — — 0.1 Balance at June 30, 2016 $ 5.1 $ 10.1 $ — $ 2.2 $ — $ 17.4 Balance at January 1, 2017 $ 3.4 $ 7.5 $ — $ 1.8 $ — $ 12.7 Restructuring charges: First quarter — 5.7 0.2 2.3 — 8.2 Second quarter — 5.8 0.1 2.6 — 8.5 Amounts utilized (2.6 ) (2.6 ) (0.3 ) (6.6 ) — (12.1 ) Balance at June 30, 2017 $ 0.8 $ 16.4 $ — $ 0.1 $ — $ 17.3
Restructuring and Related Costs	The following table summarizes the cumulative restructuring charges of these 2016, 2014 and 2010 restructuring actions by major component through June 30, 2017 : Chlor Alkali Products and Vinyls Winchester Total Becancour Capacity Reductions ($ in millions) Write-off of equipment and facility $ 3.5 $ 76.6 $ — $ 80.1 Employee severance and job related benefits 2.7 5.1 13.1 20.9 Facility exit costs 3.1 17.8 2.3 23.2 Pension and other postretirement benefits curtailment — — 4.1 4.1 Employee relocation costs — 1.7 6.0 7.7 Lease and other contract termination costs 5.3 25.0 — 30.3 Total cumulative restructuring charges $ 14.6 $ 126.2 $ 25.5 $ 166.3

ALLOWANCE FOR DOUBTFUL ACCOUN31

ALLOWANCE FOR DOUBTFUL ACCOUNTS RECEIVABLES (Tables)	6 Months Ended
	Jun. 30, 2017
Accounts Receivable, Net [Abstract]
Allowance for Doubtful Accounts Receivable	Allowance for doubtful accounts receivable consisted of the following: June 30, 2017 2016 ($ in millions) Balance at beginning of year $ 10.1 $ 6.4 Provisions charged 2.1 2.2 Write-offs, net of recoveries — (0.8 ) Balance at end of period $ 12.2 $ 7.8

INVENTORIES (Tables)

INVENTORIES (Tables)	6 Months Ended
	Jun. 30, 2017
Inventory Disclosure [Abstract]
Inventories Table	Inventories consisted of the following: June 30, December 31, June 30, ($ in millions) Supplies $ 59.7 $ 58.1 $ 60.9 Raw materials 74.9 72.6 82.1 Work in process 133.7 110.7 102.8 Finished goods 445.8 424.9 423.4 714.1 666.3 669.2 LIFO reserve (47.9 ) (35.9 ) (33.0 ) Inventories, net $ 666.2 $ 630.4 $ 636.2

OTHER ASSETS (Tables)

OTHER ASSETS (Tables)	6 Months Ended
	Jun. 30, 2017
Other Assets [Abstract]
Schedule of Other Assets	Included in other assets were the following: June 30, 2017 December 31, 2016 June 30, 2016 ($ in millions) Investments in non-consolidated affiliates $ 27.7 $ 26.7 $ 25.6 Deferred debt issuance costs 2.8 2.6 2.9 Tax-related receivables 16.0 17.5 18.2 Interest rate swaps 4.7 7.7 3.7 Supply contracts 554.1 566.7 518.8 Other 20.3 23.2 19.4 Other assets $ 625.6 $ 644.4 $ 588.6

GOODWILL AND INTANGIBLES (Table

GOODWILL AND INTANGIBLES (Tables)	6 Months Ended
	Jun. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	Changes in the carrying value of goodwill were as follows: Chlor Alkali Products and Vinyls Epoxy Total ($ in millions) Balance at January 1, 2016 $ 1,877.5 $ 296.6 $ 2,174.1 Acquisition activity 9.7 2.2 11.9 Foreign currency translation adjustment 0.2 0.1 0.3 Balance at June 30, 2016 $ 1,887.4 $ 298.9 $ 2,186.3 Balance at January 1, 2017 $ 1,831.3 $ 286.7 2,118.0 Foreign currency translation adjustment 1.2 0.3 1.5 Balance at June 30, 2017 $ 1,832.5 $ 287.0 $ 2,119.5
Schedule of Finite-Lived Intangible Assets	Intangible assets consisted of the following: June 30, 2017 December 31, 2016 June 30, 2016 Gross Amount Accumulated Amortization Net Gross Amount Accumulated Amortization Net Gross Amount Accumulated Amortization Net ($ in millions) Customers, customer contracts and relationships $ 675.0 $ (138.2 ) $ 536.8 $ 667.8 $ (112.9 ) $ 554.9 $ 672.3 $ (88.8 ) $ 583.5 Trade name 7.0 (2.5 ) 4.5 17.8 (12.7 ) 5.1 17.9 (6.5 ) 11.4 Acquired technology 85.3 (21.3 ) 64.0 84.2 (15.0 ) 69.2 84.9 (9.1 ) 75.8 Other 2.3 (2.0 ) 0.3 2.3 (1.9 ) 0.4 2.3 (1.8 ) 0.5 Total intangible assets $ 769.6 $ (164.0 ) $ 605.6 $ 772.1 $ (142.5 ) $ 629.6 $ 777.4 $ (106.2 ) $ 671.2

EARNINGS PER SHARE (Tables)

EARNINGS PER SHARE (Tables)	6 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
Basic and Diluted Earnings Per Share Table	Three Months Ended Six Months Ended 2017 2016 2017 2016 Computation of (Loss) Income per Share (In millions, except per share data) Net (loss) income $ (5.9 ) $ (1.0 ) $ 7.5 $ (38.9 ) Basic shares 166.1 165.2 165.8 165.1 Basic net (loss) income per share $ (0.04 ) $ (0.01 ) $ 0.05 $ (0.24 ) Diluted shares: Basic shares 166.1 165.2 165.8 165.1 Stock-based compensation — — 2.2 — Diluted shares 166.1 165.2 168.0 165.1 Diluted net (loss) income per share $ (0.04 ) $ (0.01 ) $ 0.04 $ (0.24 )

SHAREHOLDERS' EQUITY (Tables)

SHAREHOLDERS' EQUITY (Tables)	6 Months Ended
	Jun. 30, 2017
Stockholders' Equity Note [Abstract]
Activity included in accumulated other comprehensive loss table	The following table represents the activity included in accumulated other comprehensive loss: Foreign Currency Translation Adjustment (net of taxes) 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, 2016 $ (12.1 ) $ (6.9 ) $ (473.5 ) $ (492.5 ) Unrealized gains (losses): First quarter 24.0 1.1 — 25.1 Second quarter (14.3 ) (4.6 ) — (18.9 ) Reclassification adjustments into income: First quarter — 3.7 6.1 9.8 Second quarter — 1.7 5.9 7.6 Tax (provision) benefit: First quarter (8.5 ) (1.8 ) (2.3 ) (12.6 ) Second quarter 3.5 1.1 (2.4 ) 2.2 Net Change 4.7 1.2 7.3 13.2 Balance at June 30, 2016 $ (7.4 ) $ (5.7 ) $ (466.2 ) $ (479.3 ) Balance at January 1, 2017 $ (24.1 ) $ 12.8 $ (498.7 ) $ (510.0 ) Unrealized gains (losses): First quarter 8.3 (3.1 ) — 5.2 Second quarter 28.1 (3.7 ) — 24.4 Reclassification adjustments into income: First quarter — (0.1 ) 6.6 6.5 Second quarter — (2.3 ) 6.8 4.5 Tax (provision) benefit: First quarter (2.3 ) 1.2 (2.7 ) (3.8 ) Second quarter (12.2 ) 2.3 (2.3 ) (12.2 ) Net Change 21.9 (5.7 ) 8.4 24.6 Balance at June 30, 2017 $ (2.2 ) $ 7.1 $ (490.3 ) $ (485.4 )

SEGMENT INFORMATION (Tables)

SEGMENT INFORMATION (Tables)	6 Months Ended
	Jun. 30, 2017
Segment Reporting [Abstract]
Segment Information	Three Months Ended Six Months Ended 2017 2016 2017 2016 Sales: ($ in millions) Chlor Alkali Products and Vinyls $ 865.1 $ 733.0 $ 1,702.0 $ 1,437.3 Epoxy 492.0 450.0 1,059.6 910.2 Winchester 169.4 181.0 332.0 364.7 Total sales $ 1,526.5 $ 1,364.0 $ 3,093.6 $ 2,712.2 Income (loss) before taxes: Chlor Alkali Products and Vinyls $ 52.8 $ 30.7 $ 140.3 $ 98.8 Epoxy (8.1 ) — (9.3 ) 8.2 Winchester 19.0 31.2 44.1 59.9 Corporate/other: Pension income 10.7 12.6 21.0 24.8 Environmental expense (1.8 ) (2.4 ) (4.4 ) (5.1 ) Other corporate and unallocated costs (29.7 ) (23.9 ) (63.1 ) (53.5 ) Restructuring charges (8.5 ) (8.2 ) (16.7 ) (101.0 ) Acquisition-related costs (4.4 ) (16.3 ) (11.4 ) (26.5 ) Other operating income (expense) 0.3 (0.2 ) (0.1 ) 10.7 Interest expense (52.5 ) (47.6 ) (104.9 ) (96.1 ) Interest income 0.4 0.5 0.6 0.8 Loss before taxes $ (21.8 ) $ (23.6 ) $ (3.9 ) $ (79.0 )

STOCK-BASED COMPENSATION (Table

STOCK-BASED COMPENSATION (Tables)	6 Months Ended
	Jun. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-based compensation expense	Stock-based compensation expense was as follows: Three Months Ended Six Months Ended 2017 2016 2017 2016 ($ in millions) Stock-based compensation $ 4.2 $ 1.6 $ 11.5 $ 6.0 Mark-to-market adjustments (1.3 ) 2.0 1.3 2.4 Total expense $ 2.9 $ 3.6 $ 12.8 $ 8.4
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 2017 2016 Dividend yield 2.69 % 6.09 % Risk-free interest rate 2.06 % 1.35 % Expected volatility 34 % 32 % Expected life (years) 6.0 6.0 Weighted-average grant fair value (per option) $ 7.78 $ 1.90 Weighted-average exercise price $ 29.75 $ 13.14 Shares granted 1,572,000 1,670,400

PENSION PLANS AND RETIREMENT 39

PENSION PLANS AND RETIREMENT BENEFITS (Tables)	6 Months Ended
	Jun. 30, 2017
Retirement Benefits [Abstract]
Components of Net Periodic Benefit (Income) Cost	Pension Benefits Other Postretirement Three Months Ended Three Months Ended 2017 2016 2017 2016 Components of Net Periodic Benefit (Income) Cost ($ in millions) Service cost $ 4.1 $ 2.7 $ 0.3 $ 0.4 Interest cost 21.5 21.8 0.4 0.4 Expected return on plans’ assets (39.3 ) (39.1 ) — — Amortization of prior service cost — 0.1 (0.7 ) — Recognized actuarial loss 6.8 5.0 0.7 0.8 Net periodic benefit (income) cost $ (6.9 ) $ (9.5 ) $ 0.7 $ 1.6 Pension Benefits Other Postretirement Six Months Ended Six Months Ended 2017 2016 2017 2016 Components of Net Periodic Benefit (Income) Cost ($ in millions) Service cost $ 8.4 $ 5.9 $ 0.6 $ 0.7 Interest cost 43.2 44.2 0.8 0.9 Expected return on plans’ assets (78.4 ) (78.9 ) — — Amortization of prior service cost — 0.1 (1.3 ) — Recognized actuarial loss 13.4 10.3 1.3 1.6 Net periodic benefit (income) cost $ (13.4 ) $ (18.4 ) $ 1.4 $ 3.2

INCOME TAXES (Tables)

INCOME TAXES (Tables)	6 Months Ended
	Jun. 30, 2017
Income Tax Disclosure [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 35.0% to income before taxes. Three Months Ended Six Months Ended Effective Tax Rate Reconciliation (Percent) 2017 2016 2017 2016 Statutory federal tax rate 35.0 % 35.0 % 35.0 % 35.0 % Salt depletion (9.6 ) 40.1 (10.2 ) 9.6 Stock-based compensation 3.9 — 61.0 — Foreign rate differential (3.2 ) 14.0 (3.7 ) 1.5 U.S. tax on foreign earnings 3.2 (13.7 ) 3.7 (1.4 ) Dividends paid to CEOP (0.4 ) 3.4 (0.4 ) 0.6 State income taxes, net 0.4 21.8 (0.3 ) 5.6 Change in valuation allowance — (1.0 ) — (0.3 ) Change in tax contingencies 45.7 (20.6 ) 251.3 (5.1 ) Return to provision (2.3 ) 18.9 (42.6 ) 5.7 Other, net 0.2 (2.1 ) (1.5 ) (0.4 ) Effective tax rate 72.9 % 95.8 % 292.3 % 50.8 %
Unrecognized Tax Benefits	The amount of unrecognized tax benefits was as follows: June 30, 2017 2016 ($ in millions) Balance at beginning of year $ 38.4 $ 35.1 Increases for prior year tax positions 4.9 5.7 Decreases for prior year tax positions (9.2 ) (1.8 ) Increases for current year tax positions 1.4 0.9 Settlement with taxing authorities (1.0 ) (2.1 ) Reductions due to statute of limitations (0.2 ) (0.3 ) Balance at end of period $ 34.3 $ 37.5
Tax Returns Subject to Examination	For our primary tax jurisdictions, the tax years that remain subject to examination are as follows: Tax Years U.S. federal income tax 2013 - 2016 U.S. state income tax 2006 - 2016 Canadian federal income tax 2012 - 2016 Brazil 2014 - 2016 Germany 2015 - 2016 China 2014 - 2016 The Netherlands 2014 - 2016 South Korea 2014 - 2016

DERIVATIVE FINANCIAL INSTRUME41

DERIVATIVE FINANCIAL INSTRUMENTS (Tables)	6 Months Ended
	Jun. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of derivative instruments	We had the following notional amount of outstanding commodity contracts that were entered into to hedge forecasted purchases: June 30, 2017 December 31, 2016 June 30, 2016 ($ in millions) Copper $ 42.8 $ 35.8 $ 38.7 Zinc 7.9 8.0 8.0 Lead — 3.4 8.4 Natural gas 45.0 54.4 0.4
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 Balance Sheet Location June 30, 2017 December 31, 2016 June 30, 2016 Balance Sheet Location June 30, 2017 December 31, 2016 June 30, 2016 ($ in millions) ($ in millions) Derivatives Designated as Hedging Instruments Interest rate contracts Other current assets $ 5.0 $ 1.9 $ — Current installments of long-term debt $ 0.1 $ 0.1 $ — Interest rate contracts Other assets 4.6 7.7 — Long-term debt — — 0.3 Interest rate contracts Other assets — — 3.7 Other liabilities 24.9 28.5 6.2 Commodity contracts – gains Other current assets 4.9 13.2 — Accrued liabilities (0.1 ) — (1.8 ) Commodity contracts – losses Other current assets (0.9 ) (1.7 ) — Accrued liabilities 2.3 — 4.9 $ 13.6 $ 21.1 $ 3.7 $ 27.2 $ 28.6 $ 9.6 Derivatives Not Designated as Hedging Instruments Foreign exchange contracts – gains Other current assets $ 1.7 $ 0.6 $ 0.1 Accrued liabilities $ — $ (0.5 ) $ (0.7 ) Foreign exchange contracts – losses Other current assets (0.5 ) (0.5 ) — Accrued liabilities — 1.7 2.8 $ 1.2 $ 0.1 $ 0.1 $ — $ 1.2 $ 2.1 Total derivatives (1) $ 14.8 $ 21.2 $ 3.8 $ 27.2 $ 29.8 $ 11.7 (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 Six Months Ended Location of Gain (Loss) 2017 2016 2017 2016 Derivatives – Cash Flow Hedges ($ in millions) Recognized in other comprehensive income (loss) (effective portion): Commodity contracts ——— $ (2.4 ) $ 1.6 $ (7.4 ) $ 2.7 Interest rate contracts ——— (1.3 ) (6.2 ) 0.6 (6.2 ) $ (3.7 ) $ (4.6 ) $ (6.8 ) $ (3.5 ) Reclassified from accumulated other comprehensive loss into income (effective portion): Interest rate contracts Interest expense $ 0.5 $ — $ 0.5 $ — Commodity contracts Cost of goods sold 1.8 (1.7 ) 1.9 (5.4 ) $ 2.3 $ (1.7 ) $ 2.4 $ (5.4 ) Derivatives – Fair Value Hedges Interest rate contracts Interest expense $ 0.8 $ 1.2 $ 2.0 $ 1.9 Derivatives Not Designated as Hedging Instruments Commodity contracts Cost of goods sold $ — $ — $ — $ (0.4 ) Foreign exchange contracts Selling and administration 5.0 (4.2 ) 0.5 (7.3 ) $ 5.0 $ (4.2 ) $ 0.5 $ (7.7 )

FAIR VALUE MEASUREMENTS (Tables

FAIR VALUE MEASUREMENTS (Tables)	6 Months Ended
	Jun. 30, 2017
Fair Value Disclosures [Abstract]
Table of financial instruments measured at fair value	The following table summarizes the assets and liabilities measured at fair value in the condensed balance sheets: Fair Value Measurements Balance at June 30, 2017 Level 1 Level 2 Level 3 Total Assets ($ in millions) Interest rate swaps $ — $ 9.6 $ — $ 9.6 Commodity contracts — 4.0 — 4.0 Foreign exchange contracts — 1.2 — 1.2 Liabilities Interest rate swaps $ — $ 25.0 $ — $ 25.0 Commodity contracts — 2.2 — 2.2 Balance at December 31, 2016 Assets Interest rate swaps $ — $ 9.6 $ — $ 9.6 Commodity contracts — 11.5 — 11.5 Foreign exchange contracts — 0.1 — 0.1 Liabilities Interest rate swaps $ — $ 28.6 $ — $ 28.6 Foreign exchange contracts — 1.2 — 1.2 Balance at June 30, 2016 Assets Interest rate swaps $ — $ 3.7 $ — $ 3.7 Foreign exchange contracts — 0.1 — 0.1 Liabilities Interest rate swaps $ — $ 6.5 $ — $ 6.5 Commodity contracts — 3.1 — 3.1 Foreign exchange contracts — 2.1 — 2.1
Fair value of debt table	The following table summarizes the fair value measurements of debt and the actual debt recorded on our condensed balance sheets: Fair Value Measurements Amount recorded Level 1 Level 2 Level 3 Total ($ in millions) Balance at June 30, 2017 $ — $ 3,777.8 $ 153.0 $ 3,930.8 $ 3,600.6 Balance at December 31, 2016 — 3,703.7 153.0 3,856.7 3,617.6 Balance at June 30, 2016 — 3,740.3 153.0 3,893.3 3,695.8

SUPPLEMENTAL GUARANTOR FINANC43

SUPPLEMENTAL GUARANTOR FINANCIAL INFORMATION (Tables)	6 Months Ended
	Jun. 30, 2017
Supplemental Guarantor Financial Information [Abstract]
Supplemental Guarantor Financial Information Balance Sheets	CONDENSED CONSOLIDATING BALANCE SHEETS June 30, 2017 (In millions) (Unaudited) Parent Guarantor Issuer Subsidiary Eliminations Total Assets Current assets: Cash and cash equivalents $ 28.9 $ — $ 155.6 $ — $ 184.5 Receivables, net 101.7 — 680.5 — 782.2 Intercompany receivables — 2.9 2,052.9 (2,055.8 ) — Income taxes receivable 18.8 — 7.2 (5.1 ) 20.9 Inventories 178.2 — 488.0 — 666.2 Other current assets 183.1 — 7.0 (152.9 ) 37.2 Total current assets 510.7 2.9 3,391.2 (2,213.8 ) 1,691.0 Property, plant and equipment, net 509.1 — 3,118.3 — 3,627.4 Investment in subsidiaries 6,082.7 3,774.0 — (9,856.7 ) — Deferred income taxes 151.8 — 97.8 (124.4 ) 125.2 Other assets 46.9 — 578.7 — 625.6 Long-term receivables—affiliates — 2,204.3 — (2,204.3 ) — Intangible assets, net 0.4 5.7 599.5 — 605.6 Goodwill — 966.3 1,153.2 — 2,119.5 Total assets $ 7,301.6 $ 6,953.2 $ 8,938.7 $ (14,399.2 ) $ 8,794.3 Liabilities and Shareholders' Equity Current liabilities: Current installments of long-term debt $ 0.8 $ 68.8 $ 12.1 $ — $ 81.7 Accounts payable 58.0 — 603.7 (5.6 ) 656.1 Intercompany payables 2,055.8 — — (2,055.8 ) — Income taxes payable — — 12.2 (5.1 ) 7.1 Accrued liabilities 116.1 — 296.6 (151.2 ) 261.5 Total current liabilities 2,230.7 68.8 924.6 (2,217.7 ) 1,006.4 Long-term debt 822.3 2,487.4 209.2 — 3,518.9 Accrued pension liability 421.7 — 203.9 — 625.6 Deferred income taxes — 237.9 924.1 (124.4 ) 1,037.6 Long-term payables—affiliates 1,284.4 — 919.9 (2,204.3 ) — Other liabilities 283.9 8.1 55.2 — 347.2 Total liabilities 5,043.0 2,802.2 3,236.9 (4,546.4 ) 6,535.7 Commitments and contingencies Shareholders' equity: Common stock 166.3 — 14.6 (14.6 ) 166.3 Additional paid-in capital 2,262.7 4,125.7 4,808.2 (8,933.9 ) 2,262.7 Accumulated other comprehensive loss (485.4 ) — (8.6 ) 8.6 (485.4 ) Retained earnings 315.0 25.3 887.6 (912.9 ) 315.0 Total shareholders' equity 2,258.6 4,151.0 5,701.8 (9,852.8 ) 2,258.6 Total liabilities and shareholders' equity $ 7,301.6 $ 6,953.2 $ 8,938.7 $ (14,399.2 ) $ 8,794.3 CONDENSED CONSOLIDATING BALANCE SHEETS December 31, 2016 (In millions) (Unaudited) Parent Guarantor Issuer Subsidiary Eliminations Total Assets Current assets: Cash and cash equivalents $ 25.2 $ — $ 159.3 $ — $ 184.5 Receivables, net 88.3 — 586.7 — 675.0 Intercompany receivables — — 1,912.3 (1,912.3 ) — Income taxes receivable 19.0 — 7.3 (0.8 ) 25.5 Inventories 167.7 — 462.7 — 630.4 Other current assets 164.7 3.4 1.2 (138.5 ) 30.8 Total current assets 464.9 3.4 3,129.5 (2,051.6 ) 1,546.2 Property, plant and equipment, net 510.1 — 3,194.8 — 3,704.9 Investment in subsidiaries 6,035.2 3,734.7 — (9,769.9 ) — Deferred income taxes 133.5 — 103.5 (117.5 ) 119.5 Other assets 48.1 — 596.3 — 644.4 Long-term receivables—affiliates — 2,194.2 — (2,194.2 ) — Intangible assets, net 0.4 5.7 623.5 — 629.6 Goodwill — 966.3 1,151.7 — 2,118.0 Total assets $ 7,192.2 $ 6,904.3 $ 8,799.3 $ (14,133.2 ) $ 8,762.6 Liabilities and Shareholders' Equity Current liabilities: Current installments of long-term debt $ 0.6 $ 67.5 $ 12.4 $ — $ 80.5 Accounts payable 45.3 — 527.4 (1.9 ) 570.8 Intercompany payables 1,882.8 29.5 — (1,912.3 ) — Income taxes payable — — 8.3 (0.8 ) 7.5 Accrued liabilities 124.9 — 277.5 (138.6 ) 263.8 Total current liabilities 2,053.6 97.0 825.6 (2,053.6 ) 922.6 Long-term debt 913.9 2,413.3 209.9 — 3,537.1 Accrued pension liability 453.7 — 184.4 — 638.1 Deferred income taxes — 223.6 926.4 (117.5 ) 1,032.5 Long-term payables—affiliates 1,209.1 — 985.1 (2,194.2 ) — Other liabilities 288.9 6.6 63.8 — 359.3 Total liabilities 4,919.2 2,740.5 3,195.2 (4,365.3 ) 6,489.6 Commitments and contingencies Shareholders' equity: Common stock 165.4 — 14.6 (14.6 ) 165.4 Additional paid-in capital 2,243.8 4,125.7 4,808.2 (8,933.9 ) 2,243.8 Accumulated other comprehensive loss (510.0 ) — (7.0 ) 7.0 (510.0 ) Retained earnings 373.8 38.1 788.3 (826.4 ) 373.8 Total shareholders' equity 2,273.0 4,163.8 5,604.1 (9,767.9 ) 2,273.0 Total liabilities and shareholders' equity $ 7,192.2 $ 6,904.3 $ 8,799.3 $ (14,133.2 ) $ 8,762.6 CONDENSED CONSOLIDATING BALANCE SHEETS June 30, 2016 (In millions) (Unaudited) Parent Guarantor Issuer Subsidiary Eliminations Total Assets Current assets: Cash and cash equivalents $ 23.2 $ — $ 43.4 $ — $ 66.6 Receivables, net 98.2 — 692.3 — 790.5 Intercompany receivables — 22.3 1,712.1 (1,734.4 ) — Income taxes receivable 35.1 — 10.7 — 45.8 Inventories 175.2 — 461.0 — 636.2 Other current assets 146.1 — 5.4 (127.7 ) 23.8 Total current assets 477.8 22.3 2,924.9 (1,862.1 ) 1,562.9 Property, plant and equipment, net 494.7 — 3,298.6 — 3,793.3 Investment in subsidiaries 5,957.3 3,655.0 — (9,612.3 ) — Deferred income taxes 166.2 — 88.5 (147.7 ) 107.0 Other assets 40.4 — 548.2 — 588.6 Long-term receivables—affiliates — 2,262.4 — (2,262.4 ) — Intangible assets, net 0.5 5.7 665.0 — 671.2 Goodwill — 994.2 1,192.1 — 2,186.3 Total assets $ 7,136.9 $ 6,939.6 $ 8,717.3 $ (13,884.5 ) $ 8,909.3 Liabilities and Shareholders' Equity Current liabilities: Current installments of long-term debt $ 0.6 $ 67.5 $ 12.2 $ — $ 80.3 Accounts payable 59.8 — 476.6 — 536.4 Intercompany payables 1,734.4 — — (1,734.4 ) — Income taxes payable 0.6 — 7.6 — 8.2 Accrued liabilities 133.4 — 287.9 (127.7 ) 293.6 Total current liabilities 1,928.8 67.5 784.3 (1,862.1 ) 918.5 Long-term debt 1,158.3 2,444.8 12.4 — 3,615.5 Accrued pension liability 164.1 — 452.6 — 616.7 Deferred income taxes — 294.7 932.3 (147.7 ) 1,079.3 Long-term payables—affiliates 1,277.3 — 985.1 (2,262.4 ) — Other liabilities 277.4 — 70.9 — 348.3 Total liabilities 4,805.9 2,807.0 3,237.6 (4,272.2 ) 6,578.3 Commitments and contingencies Shareholders' equity: Common stock 165.2 — 15.1 (15.1 ) 165.2 Additional paid-in capital 2,240.3 4,125.7 4,756.4 (8,882.1 ) 2,240.3 Accumulated other comprehensive loss (479.3 ) — (21.1 ) 21.1 (479.3 ) Retained earnings 404.8 6.9 729.3 (736.2 ) 404.8 Total shareholders' equity 2,331.0 4,132.6 5,479.7 (9,612.3 ) 2,331.0 Total liabilities and shareholders' equity $ 7,136.9 $ 6,939.6 $ 8,717.3 $ (13,884.5 ) $ 8,909.3
Supplemental Guarantor Financial Information Statement of Operations	CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Six Months Ended June 30, 2017 (In millions) (Unaudited) Parent Guarantor Issuer Subsidiary Eliminations Total Sales $ 652.9 $ — $ 2,655.1 $ (214.4 ) $ 3,093.6 Operating expenses: Cost of goods sold 569.5 — 2,442.7 (214.4 ) 2,797.8 Selling and administration 68.6 — 99.6 — 168.2 Restructuring charges — — 16.7 — 16.7 Acquisition-related costs 11.4 — — — 11.4 Other operating (expense) income (4.5 ) — 4.4 — (0.1 ) Operating (loss) income (1.1 ) — 100.5 — 99.4 Earnings of non-consolidated affiliates 1.0 — — — 1.0 Equity income (loss) in subsidiaries 18.4 39.3 — (57.7 ) — Interest expense 21.4 82.8 4.0 (3.3 ) 104.9 Interest income 3.0 — 0.9 (3.3 ) 0.6 Income (loss) before taxes (0.1 ) (43.5 ) 97.4 (57.7 ) (3.9 ) Income tax (benefit) provision (7.6 ) (30.7 ) 26.9 — (11.4 ) Net income (loss) $ 7.5 $ (12.8 ) $ 70.5 $ (57.7 ) $ 7.5 CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Three Months Ended June 30, 2017 (In millions) (Unaudited) Parent Guarantor Issuer Subsidiary Eliminations Total Sales $ 338.1 $ — $ 1,294.7 $ (106.3 ) $ 1,526.5 Operating expenses: Cost of goods sold 294.7 — 1,215.7 (106.3 ) 1,404.1 Selling and administration 27.5 — 52.5 — 80.0 Restructuring charges — — 8.5 — 8.5 Acquisition-related costs 4.4 — — — 4.4 Other operating (expense) income (4.0 ) — 4.3 — 0.3 Operating income 7.5 — 22.3 — 29.8 Earnings of non-consolidated affiliates 0.5 — — — 0.5 Equity (loss) income in subsidiaries (7.8 ) 4.2 — 3.6 — Interest expense 9.4 41.9 3.1 (1.9 ) 52.5 Interest income 2.3 — — (1.9 ) 0.4 Income (loss) before taxes (6.9 ) (37.7 ) 19.2 3.6 (21.8 ) Income tax (benefit) provision (1.0 ) (15.5 ) 0.6 — (15.9 ) Net (loss) income $ (5.9 ) $ (22.2 ) $ 18.6 $ 3.6 $ (5.9 ) CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Six Months Ended June 30, 2016 (In millions) (Unaudited) Parent Guarantor Issuer Subsidiary Eliminations Total Sales $ 650.5 $ — $ 2,296.0 $ (234.3 ) $ 2,712.2 Operating expenses: Cost of goods sold 560.7 — 2,085.9 (234.3 ) 2,412.3 Selling and administration 72.8 — 94.6 — 167.4 Restructuring charges 0.6 — 100.4 — 101.0 Acquisition-related costs 25.3 — 1.2 — 26.5 Other operating (expense) income (1.1 ) — 11.8 — 10.7 Operating (loss) income (10.0 ) — 25.7 — 15.7 Earnings of non-consolidated affiliates 0.6 — — — 0.6 Equity (loss) income in subsidiaries (21.2 ) 59.3 — (38.1 ) — Interest expense 21.0 76.0 1.9 (2.8 ) 96.1 Interest income 1.5 — 2.1 (2.8 ) 0.8 Income (loss) before taxes (50.1 ) (16.7 ) 25.9 (38.1 ) (79.0 ) Income tax benefit (11.2 ) (28.2 ) (0.7 ) — (40.1 ) Net (loss) income $ (38.9 ) $ 11.5 $ 26.6 $ (38.1 ) $ (38.9 ) CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Three Months Ended June 30, 2016 (In millions) (Unaudited) Parent Guarantor Issuer Subsidiary Eliminations Total Sales $ 329.8 $ — $ 1,154.7 $ (120.5 ) $ 1,364.0 Operating expenses: Cost of goods sold 285.4 — 1,072.0 (120.5 ) 1,236.9 Selling and administration 36.0 — 43.3 — 79.3 Restructuring charges 0.3 — 7.9 — 8.2 Acquisition-related costs 15.1 — 1.2 — 16.3 Other operating (expense) income (0.6 ) — 0.4 — (0.2 ) Operating (loss) income (7.6 ) — 30.7 — 23.1 Earnings of non-consolidated affiliates 0.4 — — — 0.4 Equity income (loss) in subsidiaries 7.6 15.7 — (23.3 ) — Interest expense 10.3 37.8 0.9 (1.4 ) 47.6 Interest income 0.7 — 1.2 (1.4 ) 0.5 Income (loss) before taxes (9.2 ) (22.1 ) 31.0 (23.3 ) (23.6 ) Income tax (benefit) provision (8.2 ) (14.9 ) 0.5 — (22.6 ) Net (loss) income $ (1.0 ) $ (7.2 ) $ 30.5 $ (23.3 ) $ (1.0 )
Supplemental Guarantor Financial Information Statements Of Comprehensive Income	CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Six Months Ended June 30, 2017 (In millions) (Unaudited) Parent Guarantor Issuer Subsidiary Eliminations Total Net income (loss) $ 7.5 $ (12.8 ) $ 70.5 $ (57.7 ) $ 7.5 Other comprehensive income, net of tax: Foreign currency translation adjustments, net — — 21.9 — 21.9 Unrealized losses on derivative contracts, net (5.7 ) — — — (5.7 ) Amortization of prior service costs and actuarial losses, net 8.0 — 0.4 — 8.4 Total other comprehensive income, net of tax 2.3 — 22.3 — 24.6 Comprehensive income (loss) $ 9.8 $ (12.8 ) $ 92.8 $ (57.7 ) $ 32.1 CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Three Months Ended June 30, 2017 (In millions) (Unaudited) Parent Guarantor Issuer Subsidiary Eliminations Total Net (loss) income $ (5.9 ) $ (22.2 ) $ 18.6 $ 3.6 $ (5.9 ) Other comprehensive income, net of tax: Foreign currency translation adjustments, net — — 15.9 — 15.9 Unrealized losses on derivative contracts, net (3.7 ) — — — (3.7 ) Amortization of prior service costs and actuarial losses, net 4.3 — 0.2 — 4.5 Total other comprehensive income, net of tax 0.6 — 16.1 — 16.7 Comprehensive (loss) income $ (5.3 ) $ (22.2 ) $ 34.7 $ 3.6 $ 10.8 CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Six Months Ended June 30, 2016 (In millions) (Unaudited) Parent Guarantor Issuer Subsidiary Eliminations Total Net (loss) income $ (38.9 ) $ 11.5 $ 26.6 $ (38.1 ) $ (38.9 ) Other comprehensive income, net of tax: Foreign currency translation adjustments, net — — 4.7 — 4.7 Unrealized gains on derivative contracts, net 1.2 — — — 1.2 Amortization of prior service costs and actuarial losses, net 6.7 — 0.6 — 7.3 Total other comprehensive income, net of tax 7.9 — 5.3 — 13.2 Comprehensive (loss) income $ (31.0 ) $ 11.5 $ 31.9 $ (38.1 ) $ (25.7 ) CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Three Months Ended June 30, 2016 (In millions) (Unaudited) Parent Guarantor Issuer Subsidiary Eliminations Total Net (loss) income $ (1.0 ) $ (7.2 ) $ 30.5 $ (23.3 ) $ (1.0 ) Other comprehensive income (loss), net of tax: Foreign currency translation adjustments, net — — (10.8 ) — (10.8 ) Unrealized losses on derivative contracts, net (1.8 ) — — — (1.8 ) Amortization of prior service costs and actuarial losses, net 3.4 — 0.1 — 3.5 Total other comprehensive income (loss), net of tax 1.6 — (10.7 ) — (9.1 ) Comprehensive income (loss) $ 0.6 $ (7.2 ) $ 19.8 $ (23.3 ) $ (10.1 )
Supplemental Guarantor Financial Information Statements Of Cash Flows	CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Six Months Ended June 30, 2017 (In millions) (Unaudited) Parent Guarantor Issuer Subsidiary Eliminations Total Net operating activities $ 124.4 $ — $ 103.0 $ — $ 227.4 Investing Activities Capital expenditures (43.9 ) — (107.0 ) — (150.9 ) Proceeds from disposition of property, plant and equipment — — 0.1 — 0.1 Net investing activities (43.9 ) — (106.9 ) — (150.8 ) Financing Activities Long-term debt: Borrowings 500.0 1,375.0 — — 1,875.0 Repayments (590.4 ) (1,299.7 ) — — (1,890.1 ) Stock options exercised 15.8 — — — 15.8 Dividends paid (66.3 ) — — — (66.3 ) Debt issuance costs (8.3 ) (2.9 ) — — (11.2 ) Intercompany financing activities 72.4 (72.4 ) — — — Net financing activities (76.8 ) — — — (76.8 ) Effect of exchange rate changes on cash and cash equivalents — — 0.2 — 0.2 Net increase (decrease) in cash and cash equivalents 3.7 — (3.7 ) — — Cash and cash equivalents, beginning of period 25.2 — 159.3 — 184.5 Cash and cash equivalents, end of period $ 28.9 $ — $ 155.6 $ — $ 184.5 CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Six Months Ended June 30, 2016 (In millions) (Unaudited) Parent Guarantor Issuer Subsidiary Eliminations Total Net operating activities $ 305.4 $ — $ (119.2 ) $ — $ 186.2 Investing Activities Capital expenditures (26.8 ) — (110.6 ) — (137.4 ) Business acquired in purchase transaction, net of cash acquired (69.5 ) — — — (69.5 ) Payments under long-term supply contract — — (85.0 ) — (85.0 ) Proceeds from disposition of property, plant and equipment 0.2 — 0.2 — 0.4 Proceeds from disposition of affiliated companies 4.4 — — — 4.4 Net investing activities (91.7 ) — (195.4 ) — (287.1 ) Financing Activities Long-term debt repayments (125.2 ) (33.8 ) — — (159.0 ) Stock options exercised 0.2 — — — 0.2 Dividends paid (66.1 ) — — — (66.1 ) Intercompany financing activities (118.8 ) 33.8 85.0 — — Net financing activities (309.9 ) — 85.0 — (224.9 ) Effect of exchange rate changes on cash and cash equivalents — — 0.4 — 0.4 Net decrease in cash and cash equivalents (96.2 ) — (229.2 ) — (325.4 ) Cash and cash equivalents, beginning of period 119.4 — 272.6 — 392.0 Cash and cash equivalents, end of period $ 23.2 $ — $ 43.4 $ — $ 66.6

ACQUISITION (Details Textuals)

ACQUISITION (Details Textuals) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Business Acquisition [Line Items]
Acquisition-related costs	$ 4.4	$ 16.3	$ 11.4	$ 26.5
Payments to Acquire Businesses, Net of Cash Acquired			$ 0	$ 69.5

RESTRUCTURING CHARGES (Details

RESTRUCTURING CHARGES (Details Textuals) $ in Millions	3 Months Ended				6 Months Ended		15 Months Ended	31 Months Ended	80 Months Ended
	Jun. 30, 2017USD ($)	Mar. 31, 2017USD ($)	Jun. 30, 2016USD ($)	Mar. 31, 2016USD ($)	Jun. 30, 2017USD ($)	Jun. 30, 2016USD ($)	Jun. 30, 2017USD ($)	Jun. 30, 2017USD ($)	Jun. 30, 2017USD ($)	Dec. 31, 2016USD ($)	Mar. 21, 2016T	Dec. 31, 2015USD ($)	Dec. 12, 2014T	Dec. 31, 2011USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 8.5	$ 8.2	$ 8.2	$ 92.8	$ 16.7	$ 101			$ 166.3
Inception to date Amounts Utilized (cash)									63.6
Inception to date Amounts Utilized (non-cash)									84.6
Accrued restructuring costs	17.3		17.4		17.3	17.4	$ 17.3	$ 17.3	17.3	$ 12.7		$ 6.7
Chlor Alkali Products and Vinyls Capacity Reductions
Restructuring Cost and Reserve [Line Items]
Total Product Segment Production Capacity Decrease | T											433,000
Henderson Product Segment Production Capacity Decrease | T											153,000
Niagara Product Segment Production Capacity | T											300,000
Reduced Niagara Segment Production Capacity | T											240,000
Freeport Product Segment Production Capacity Decrease | T											220,000
Restructuring charges	7.4		7.9		14.9	100.1	126.2
Additional restructuring and related expected cost	25				25		25	25	25
Chlor Alkali Products Becancour
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1.1		0.1		1.8	0.4		14.6
Additional restructuring and related expected cost	5				5		5	5	5
Tonnage reduction in chlor alkali manufacutring capactiy (in tons) | T													185,000
Winchester Segment
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 0.2			$ 0.5			25.5
Estimated Project Cost For Plant Relocation	110				110		110	110	110
Estimated Capital Spending For Facility Relocation	$ 80				$ 80		$ 80	$ 80	$ 80
Government Grants for Facility Relocation Capital Spending														$ 31

RESTRUCTURING CHARGES (Detail46

RESTRUCTURING CHARGES (Details 1) - USD ($) $ in Millions	3 Months Ended				6 Months Ended		80 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Dec. 31, 2016	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	$ 17.3		$ 17.4		$ 17.3	$ 17.4	$ 17.3	$ 12.7	$ 6.7
Restructuring charges	8.5	$ 8.2	8.2	$ 92.8	16.7	101	166.3
Amounts utilized					(12.1)	(90.4)
Currency translation adjustments						0.1
Employee severance and job related benefits
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	0.8		5.1		0.8	5.1	0.8	3.4	4.6
Restructuring charges	0	0	0.2	3.9			20.9
Amounts utilized					(2.6)	(3.6)
Currency translation adjustments						0
Lease and other contract termination costs
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	16.4		10.1		16.4	10.1	16.4	7.5	2.1
Restructuring charges	5.8	5.7	0	9.2			30.3
Amounts utilized					(2.6)	(1.3)
Currency translation adjustments						0.1
Employee relocation costs
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	0		0		0	0	0	0	0
Restructuring charges	0.1	0.2	0.8	0.2			7.7
Amounts utilized					(0.3)	(1)
Currency translation adjustments						0
Facility exit costs
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	0.1		2.2		0.1	2.2	0.1	1.8	0
Restructuring charges	2.6	2.3	7.2	2.9			23.2
Amounts utilized					(6.6)	(7.9)
Currency translation adjustments						0
Write-off of Equipment and Facility
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	0		0		0	0	0	$ 0	$ 0
Restructuring charges	$ 0	$ 0	$ 0	$ 76.6			$ 80.1
Amounts utilized					$ 0	(76.6)
Currency translation adjustments						$ 0

RESTRUCTURING CHARGES (Detail47

RESTRUCTURING CHARGES (Details 2) - USD ($) $ in Millions	3 Months Ended				6 Months Ended		15 Months Ended	31 Months Ended	80 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2017	Jun. 30, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 8.5	$ 8.2	$ 8.2	$ 92.8	$ 16.7	$ 101			$ 166.3
Write-off of Equipment and Facility
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0	0	0	76.6					80.1
Employee severance and job related benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0	0	0.2	3.9					20.9
Facility exit costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2.6	2.3	7.2	2.9					23.2
Pension and other postretirement benefits curtailment
Restructuring Cost and Reserve [Line Items]
Restructuring charges									4.1
Employee relocation costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.1	0.2	0.8	0.2					7.7
Lease and other contract termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	5.8	$ 5.7	0	$ 9.2					30.3
Chlor Alkali Products Becancour
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1.1		0.1		1.8	0.4		$ 14.6
Chlor Alkali Products Becancour | Write-off of Equipment and Facility
Restructuring Cost and Reserve [Line Items]
Restructuring charges								3.5
Chlor Alkali Products Becancour | Employee severance and job related benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges								2.7
Chlor Alkali Products Becancour | Facility exit costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges								3.1
Chlor Alkali Products Becancour | Pension and other postretirement benefits curtailment
Restructuring Cost and Reserve [Line Items]
Restructuring charges								0
Chlor Alkali Products Becancour | Employee relocation costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges								0
Chlor Alkali Products Becancour | Lease and other contract termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges								$ 5.3
Chlor Alkali Products and Vinyls Capacity Reductions
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 7.4		7.9		$ 14.9	100.1	$ 126.2
Chlor Alkali Products and Vinyls Capacity Reductions | Write-off of Equipment and Facility
Restructuring Cost and Reserve [Line Items]
Restructuring charges							76.6
Chlor Alkali Products and Vinyls Capacity Reductions | Employee severance and job related benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges							5.1
Chlor Alkali Products and Vinyls Capacity Reductions | Facility exit costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges							17.8
Chlor Alkali Products and Vinyls Capacity Reductions | Pension and other postretirement benefits curtailment
Restructuring Cost and Reserve [Line Items]
Restructuring charges							0
Chlor Alkali Products and Vinyls Capacity Reductions | Employee relocation costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges							1.7
Chlor Alkali Products and Vinyls Capacity Reductions | Lease and other contract termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges							$ 25
Winchester Segment
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 0.2			$ 0.5			25.5
Winchester Segment | Write-off of Equipment and Facility
Restructuring Cost and Reserve [Line Items]
Restructuring charges									0
Winchester Segment | Employee severance and job related benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges									13.1
Winchester Segment | Facility exit costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges									2.3
Winchester Segment | Pension and other postretirement benefits curtailment
Restructuring Cost and Reserve [Line Items]
Restructuring charges									4.1
Winchester Segment | Employee relocation costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges									6
Winchester Segment | Lease and other contract termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges									$ 0

ACCOUNTS RECEIVABLE (Details Te

ACCOUNTS RECEIVABLE (Details Textuals) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
ACCOUNTS RECEIVABLE [Abstract]
Secured Borrowing Maximum Capacity					$ 250
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount	$ 326.1		$ 326.1		282.3
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount	210		210		210
Secured Borrowing Available Capacity	32.3		32.3
Repayments of Secured Debt					210
Sumitomo Credit Facility					800
Transfer of Financial Assets, Facility Maximum	256.5		256.5
Proceeds from Sale and Collection of Receivables	388	$ 26.8	777.6	$ 26.8
Continuing Involvement with Derecognized Transferred Financial Assets, Amount Outstanding	$ 148.4	$ 26.8	$ 148.4	$ 26.8	$ 126.1

ALLOWANCE FOR DOUBTFUL ACCOUN49

ALLOWANCE FOR DOUBTFUL ACCOUNTS RECEIVABLES (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Accounts Receivable, Net [Abstract]
Balance at beginning of year			$ 10.1	$ 6.4
Provisions charged	$ 0.7	$ 0.8	2.1	2.2
Write-offs, net of recoveries			0	(0.8)
Balance at end of period	$ 12.2	$ 7.8	$ 12.2	$ 7.8

INVENTORIES (Details)

INVENTORIES (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Inventory Disclosure [Abstract]
Supplies	$ 59.7	$ 58.1	$ 60.9
Raw materials	74.9	72.6	82.1
Work in process	133.7	110.7	102.8
Finished goods	445.8	424.9	423.4
Inventory, gross	714.1	666.3	669.2
LIFO reserve	(47.9)	(35.9)	(33)
Inventories, net	$ 666.2	$ 630.4	$ 636.2

OTHER ASSETS (Details)

OTHER ASSETS (Details) - USD ($) $ in Millions	Oct. 05, 2015	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Other Assets [Abstract]
Investments in non-consolidated affiliates		$ 27.7	$ 25.6	$ 27.7	$ 25.6	$ 26.7
Deferred debt issuance costs		2.8	2.9	2.8	2.9	2.6
Tax-Related Receivable, Noncurrent		16	18.2	16	18.2	17.5
Interest rate swaps		4.7	3.7	4.7	3.7	7.7
Supply Contracts		554.1	518.8	554.1	518.8	566.7
Other		20.3	19.4	20.3	19.4	23.2
Other assets		625.6	588.6	625.6	588.6	644.4
Business Combination, Separately Recognized Transactions [Line Items]
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Ethylene Asset	$ 416.1
2017 Supply Contract Payment				209.4
Payments under long-term supply contract				0	(85)	$ (175.7)
Amortization of Supply Contracts		$ 6.3	$ 4.4	12.6	$ 8.7
Minimum
Business Combination, Separately Recognized Transactions [Line Items]
2020 Supply Contract Payment				425
Maximum
Business Combination, Separately Recognized Transactions [Line Items]
2020 Supply Contract Payment				$ 465
DCP Business
Business Combination, Separately Recognized Transactions [Line Items]
Payments for Supply of Ethylene	$ 433.5

GOODWILL AND INTANGIBLES (Detai

GOODWILL AND INTANGIBLES (Details 1) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Goodwill [Line Items]
Goodwill	$ 2,119.5	$ 2,186.3	$ 2,118	$ 2,174.1
Acquisition activity		11.9
Foreign currency translation adjustment	1.5	0.3
Chlor Alkali Products and Vinyls Segment
Goodwill [Line Items]
Goodwill	1,832.5	1,887.4	1,831.3	1,877.5
Acquisition activity		9.7
Foreign currency translation adjustment	1.2	0.2
Epoxy Segment
Goodwill [Line Items]
Goodwill	287	298.9	$ 286.7	$ 296.6
Acquisition activity		2.2
Foreign currency translation adjustment	$ 0.3	$ 0.1

GOODWILL AND INTANGIBLES (Det53

GOODWILL AND INTANGIBLES (Details 2) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Schedule Of Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	$ 769.6	$ 772.1	$ 777.4
Finite-Lived Intangible Assets, Accumulated Amortization	(164)	(142.5)	(106.2)
Finite-Lived Intangible Assets, Net	605.6	629.6	671.2
Customers, customer contracts and relationships
Schedule Of Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	675	667.8	672.3
Finite-Lived Intangible Assets, Accumulated Amortization	(138.2)	(112.9)	(88.8)
Finite-Lived Intangible Assets, Net	536.8	554.9	583.5
Trade Names
Schedule Of Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	7	17.8	17.9
Finite-Lived Intangible Assets, Accumulated Amortization	(2.5)	(12.7)	(6.5)
Finite-Lived Intangible Assets, Net	4.5	5.1	11.4
Acquired Technology
Schedule Of Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	85.3	84.2	84.9
Finite-Lived Intangible Assets, Accumulated Amortization	(21.3)	(15)	(9.1)
Finite-Lived Intangible Assets, Net	64	69.2	75.8
Other Intangible Assets
Schedule Of Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	2.3	2.3	2.3
Finite-Lived Intangible Assets, Accumulated Amortization	(2)	(1.9)	(1.8)
Finite-Lived Intangible Assets, Net	$ 0.3	$ 0.4	$ 0.5

GOODWILL AND INTANGIBLES (Det54

GOODWILL AND INTANGIBLES (Detail Textuals) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2016	Dec. 31, 2016
Schedule Of Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items]
K.A. Steel Chemicals Inc. trade name, Useful Life (Years)			1 year
Trade Names
Schedule Of Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items]
Amortization	$ 2.8	$ 5.5

EARNINGS PER SHARE (Details)

EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Share [Abstract]
Net income (loss)	$ (5.9)	$ (1)	$ 7.5	$ (38.9)
Basic shares (in shares)	166.1	165.2	165.8	165.1
Basic net income (loss) per share (in dollars per share)	$ (0.04)	$ (0.01)	$ 0.05	$ (0.24)
Earnings Per Share, Diluted [Abstract]
Basic shares (in shares)	166.1	165.2	165.8	165.1
Stock-based compensation (in shares)	0	0	2.2	0
Diluted shares (in shares)	166.1	165.2	168	165.1
Diluted net income (loss) per share (in dollars per share)	$ (0.04)	$ (0.01)	$ 0.04	$ (0.24)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	6.9	6.9	1.6	6.9

ENVIRONMENTAL (Details)

ENVIRONMENTAL (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Environmental Remediation Obligations [Abstract]
Reserves for future environmental expenditures - total	$ 135.7	$ 138.9	$ 135.7	$ 138.9	$ 137.3
Reserves for environmental expenditures - noncurrent	118.7	119.9	118.7	119.9	$ 120.3
Environmental Remediation Expense	$ 1.8	$ 2.4	$ 4.4	$ 5.1

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2017	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Legal action liabilities	$ 22.1	$ 15.9	$ 13.6
Gain in Other Operating Income due to Insurance Recoveries	$ 11

SHAREHOLDERS' EQUITY (Details)

SHAREHOLDERS' EQUITY (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended				6 Months Ended		36 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2017	Jun. 30, 2016	Apr. 24, 2017	Apr. 24, 2014
Stockholders' Equity Note [Abstract]
Authorized share repurchase program (in shares)								8
Common stock repurchased and retired (in shares)					0	0
Stock Repurchased and Retired During Period, Value					$ 0	$ 0
Total repurchased shares under this program (in shares)							1.9
Remaining shares authorized to be purchased (in shares)							6.1
Stock options exercised					0.9	0.1
Total value of stock options exercised					$ 15.8	$ 0.2
Foreign Currency Translation Adjustment [Roll Forward]
Beginning Balance		$ (24.1)		$ (12.1)	(24.1)	(12.1)
Unrealized Gain (Loss), before Reclassification Adjustments and Tax	$ 28.1	8.3	$ (14.3)	24
Reclassification Adjustments into Income	0	0	0	0
Tax Benefit (Provision)	(12.2)	(2.3)	3.5	(8.5)
Net Change in Foreign Currency Translation Adjustment					21.9	4.7
Ending Balance	(2.2)		(7.4)		(2.2)	(7.4)
Unrealized Gains (Losses) on Derivative Contracts (net of taxes) [Roll Forward]
Beginning Balance		12.8		(6.9)	12.8	(6.9)
Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(3.7)	(3.1)	(4.6)	1.1
Reclassification Adjustment from AOCI on Derivatives, before Tax	(2.3)	(0.1)	1.7	3.7
Derivatives Qualifying as Hedges, Tax	2.3	1.2	1.1	(1.8)
Net Change in Derivatives Qualifying as Hedges, Net of Tax	(3.7)		(1.8)		(5.7)	1.2
Ending Balance	7.1		(5.7)		7.1	(5.7)
Pension and Postretirement Benefits (net of taxes) [Roll Forward]
Beginning Balance		(498.7)		(473.5)	(498.7)	(473.5)
Pension and Other Postretirement Benefit Plans, Adjustment, before Reclassification Adjustments and Tax	0	0	0	0
Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, before Tax	6.8	6.6	5.9	6.1
Deferred Tax Benefit (Provision) on Pension and Other Postretirement Benefit Plans	(2.3)	(2.7)	(2.4)	(2.3)
Net Change in Pension and Other Postretirement Benefit Plans, Net of Tax					8.4	7.3
Ending Balance	(490.3)		(466.2)		(490.3)	(466.2)
Accumulated Other Comprehensive Loss [Roll Forward]
Beginning Balance		(510)		(492.5)	(510)	(492.5)
Other Comprehensive Income (Loss), Net Gain (Loss) Recognized, Before Tax	24.4	5.2	(18.9)	25.1
Reclassification Adjustment from AOCI, Before Tax	4.5	6.5	7.6	9.8
Other Comprehensive Income (Loss), Tax	(12.2)	$ (3.8)	2.2	$ (12.6)
Other Comprehensive Income (Loss), Net of Tax					24.6	13.2
Ending Balance	$ (485.4)		$ (479.3)		$ (485.4)	$ (479.3)

SEGMENT INFORMATION (Details)

SEGMENT INFORMATION (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended		80 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017
Segment Reporting Information [Line Items]
Sales	$ 1,526.5		$ 1,364		$ 3,093.6	$ 2,712.2
Income before taxes [Abstract]
Loss before taxes	(21.8)		(23.6)		(3.9)	(79)
Restructuring charges	(8.5)	$ (8.2)	(8.2)	$ (92.8)	(16.7)	(101)	$ (166.3)
Acquisition-related costs	4.4		16.3		11.4	26.5
Other operating income (expense)	0.3		(0.2)		(0.1)	10.7
Interest expense	(52.5)		(47.6)		(104.9)	(96.1)
Interest income	0.4		0.5		0.6	0.8
Chlor Alkali Products and Vinyls Segment
Segment Reporting Information [Line Items]
Sales	865.1		733		1,702	1,437.3
Income before taxes [Abstract]
Loss before taxes	52.8		30.7		140.3	98.8
Epoxy Segment
Segment Reporting Information [Line Items]
Sales	492		450		1,059.6	910.2
Income before taxes [Abstract]
Loss before taxes	(8.1)		0		(9.3)	8.2
Winchester Segment
Segment Reporting Information [Line Items]
Sales	169.4		181		332	364.7
Income before taxes [Abstract]
Loss before taxes	19		31.2		44.1	59.9
Restructuring charges			(0.2)			(0.5)	$ (25.5)
Corporate/Other
Income before taxes [Abstract]
Pension income	10.7		12.6		21	24.8
Environmental expense	(1.8)		(2.4)		(4.4)	(5.1)
Other corporate and unallocated costs	(29.7)		(23.9)		(63.1)	(53.5)
Restructuring charges	(8.5)		(8.2)		(16.7)	(101)
Acquisition-related costs	$ 4.4		$ 16.3		$ 11.4	$ 26.5

STOCK-BASED COMPENSATION (Detai

STOCK-BASED COMPENSATION (Details 1) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Allocated Share-based Compensation Expense	$ 4.2	$ 1.6	$ 11.5	$ 6
Mark-to-market adjustments	(1.3)	2	1.3	2.4
Total expense	$ 2.9	$ 3.6	$ 12.8	$ 8.4

STOCK-BASED COMPENSATION (Det61

STOCK-BASED COMPENSATION (Details 2) - $ / shares	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Dividend yield	2.69%	6.09%
Risk-free interest rate	2.06%	1.35%
Expected volatility	34.00%	32.00%
Fair Value Assumptions, Expected Term, Simplified Method	6	6
Weighted average grant fair value (per option)	$ 7.78	$ 1.90
Weighted average exercise price	$ 29.75	$ 13.14
Shares granted	1,572,000	1,670,400

DEBT (Detail Textuals)

DEBT (Detail Textuals) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Mar. 09, 2017	Jun. 23, 2015
Debt Instruments [Abstract]
Senior Credit Facility			$ 1,975	$ 1,850
Amended Delayed-Draw Term Loan Facility, Maximum Borrowing Capacity			1,375
Line of Credit Facility, Maximum Borrowing Capacity			600	$ 500
Subfacility Of Senior Credit Facitility			$ 100
Annual Required Principal Payment (Percent) in Years 1 and 2			5.00%
Annual Required Principal Payment (Percent) in Year 3			7.50%
Annual Required Principal Payment (Percent) in Years 4 and 5			10.00%
Secured Borrowing Available Capacity	$ 547.1
2027 Senior Notes			$ 500
Debt Instrument, Interest Rate, Stated Percentage			5.125%
Write-off of unamortized deferred debt issuance costs	2.7
Debt issuance costs	$ 11.2	$ 0

CONTRIBUTING EMPLOYEE OWNERSH63

CONTRIBUTING EMPLOYEE OWNERSHIP PLAN (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Defined Contribution Plan Disclosure [Line Items]
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 6	$ 6.7	$ 12.6	$ 13.3
Employer matching contributions to employee ownership plan	$ 2.5	$ 2.9	$ 5.2	$ 5.6
Minimum
Defined Contribution Plan Disclosure [Line Items]
Contribution To Individual Retirement Account Percentage Of Employees Eligible Compensation	5.00%		5.00%
Maximum
Defined Contribution Plan Disclosure [Line Items]
Contribution To Individual Retirement Account Percentage Of Employees Eligible Compensation	10.00%		10.00%

PENSION PLANS AND RETIREMENT 64

PENSION PLANS AND RETIREMENT BENEFITS (Details Textuals) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Foreign Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 0.9	$ 0.7

PENSION PLANS AND RETIREMENT 65

PENSION PLANS AND RETIREMENT BENEFITS (Details 1) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Pension Benefits
Service Cost	$ 4.1	$ 2.7	$ 8.4	$ 5.9
Interest Cost	21.5	21.8	43.2	44.2
Expected return on plans' assets	(39.3)	(39.1)	(78.4)	(78.9)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0	0.1	0	0.1
Recognized acturial loss	6.8	5	13.4	10.3
Net periodic benefit (income) cost	(6.9)	(9.5)	(13.4)	(18.4)
Other Postretirement Benefits
Service Cost	0.3	0.4	0.6	0.7
Interest Cost	0.4	0.4	0.8	0.9
Expected return on plans' assets	0	0	0	0
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(0.7)	0	(1.3)	0
Recognized acturial loss	0.7	0.8	1.3	1.6
Net periodic benefit (income) cost	$ 0.7	$ 1.6	$ 1.4	$ 3.2

INCOME TAXES (Details Textuals)

INCOME TAXES (Details Textuals) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Income Tax Examination [Line Items]
Statutory federal tax rate	35.00%	35.00%	35.00%	35.00%
Effective Income Tax Rate Reconciliation, Tax Settlement, Domestic, Amount	$ 9.5		$ 0
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount	0.9		2.4
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount		$ 4.5	1	$ 0
Income Tax Reconciliation, Prior Year Income Taxes, Salt Depletion, Amount				14.2
Income Tax Reconciliation, Prior Year Income Taxes, Non-deductible Acquisition Costs, Amount				9.7
Effective Income Tax Rate Reconciliation, Tax Contingency, Amount		4.9		4
Unrecognized Tax Benefits	34.3	37.5	34.3	37.5	$ 38.4	$ 35.1
Impact on the effective tax rate, if recognized	32.8	$ 35.8	32.8	$ 35.8
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	$ 1.4		$ 1.4
Internal Revenue Service (IRS) | Range Minimum
Income Tax Examination [Line Items]
Open Tax Year			2,013
Internal Revenue Service (IRS) | Range Maximum
Income Tax Examination [Line Items]
Open Tax Year			2,016
State and Local Jurisdiction | Minimum
Income Tax Examination [Line Items]
Open Tax Year			2,006
State and Local Jurisdiction | Maximum
Income Tax Examination [Line Items]
Open Tax Year			2,016
Foreign Country | Minimum
Income Tax Examination [Line Items]
Open Tax Year			2,012
Foreign Country | Maximum
Income Tax Examination [Line Items]
Open Tax Year			2,016
Brazil | Foreign Country | Minimum
Income Tax Examination [Line Items]
Open Tax Year			2,014
Brazil | Foreign Country | Maximum
Income Tax Examination [Line Items]
Open Tax Year			2,016
Germany | Foreign Country | Minimum
Income Tax Examination [Line Items]
Open Tax Year			2,015
Germany | Foreign Country | Maximum
Income Tax Examination [Line Items]
Open Tax Year			2,016
China | Foreign Country | Minimum
Income Tax Examination [Line Items]
Open Tax Year			2,014
China | Foreign Country | Maximum
Income Tax Examination [Line Items]
Open Tax Year			2,016
The Netherlands | Foreign Country | Minimum
Income Tax Examination [Line Items]
Open Tax Year			2,014
The Netherlands | Foreign Country | Maximum
Income Tax Examination [Line Items]
Open Tax Year			2,016
South Korea | Foreign Country | Minimum
Income Tax Examination [Line Items]
Open Tax Year			2,014
South Korea | Foreign Country | Maximum
Income Tax Examination [Line Items]
Open Tax Year			2,016

INCOME TAXES (Details 1)

INCOME TAXES (Details 1)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Tax Contingency [Line Items]
Statutory federal tax rate	35.00%	35.00%	35.00%	35.00%
Effective Income Tax Rate Reconciliation, Deduction, Salt Depletion, Percent	(9.60%)	40.10%	(10.20%)	9.60%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Percent	3.90%	0.00%	61.00%	0.00%
Foreign rate differential	(3.20%)	14.00%	(3.70%)	1.50%
US Tax on Foreign Earnings	3.20%	(13.70%)	3.70%	(1.40%)
Dividends paid to CEOP	(0.40%)	3.40%	(0.40%)	0.60%
State income taxes, net	0.40%	21.80%	(0.30%)	5.60%
Change in valuation allowance	0.00%	(1.00%)	0.00%	(0.30%)
Change in tax contingencies	45.70%	(20.60%)	251.30%	(5.10%)
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Percent	(2.30%)	18.90%	(42.60%)	5.70%
Other, net	0.20%	(2.10%)	(1.50%)	(0.40%)
Effective tax rate	72.90%	95.80%	292.30%	50.80%

INCOME TAXES (Details 2)

INCOME TAXES (Details 2) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Unrecognized Tax Benefits	$ 34.3	$ 37.5	$ 38.4	$ 35.1
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	4.9	5.7
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	(9.2)	(1.8)
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions	1.4	0.9
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	(1)	(2.1)
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	$ (0.2)	$ (0.3)

DERIVATIVE FINANCIAL INSTRUME69

DERIVATIVE FINANCIAL INSTRUMENTS (Details Textuals) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Oct. 31, 2016	Jun. 30, 2012
Derivative [Line Items]
Commodity forward contracts with Wells Fargo	$ 29.3		$ 29.3
Commodity forward contracts with Citibank	29.8		29.8
Commodity Forward Contracts with Counterparty Merrill Lynch	27.4		27.4
Commodity Forward Contracts with Counterparty JPMorgan Chase	9.2		9.2
Derivative Liability, Fair Value, Gross Liability	27.2	$ 11.7	27.2	$ 11.7	$ 29.8
Amount of terminated interest rate swaps							$ 73.1
Gain on terminated interest rate swaps	0.1		0.1				$ 2.2
Gain (Loss) on Cash Flow Hedge Ineffectiveness, Net	0	0	0	0
Commodity Contract
Derivative [Line Items]
Cash Flow Hedges Derivative Instruments at Fair Value, Net	1.9		1.9
Cash Flow Hedge Gain (Loss) to be Reclassified wihtin Twelve Months			0.1
Interest Rate Contract
Derivative [Line Items]
Cash Flow Hedges Derivative Instruments at Fair Value, Net	9.6		9.6
Cash Flow Hedge Gain (Loss) to be Reclassified wihtin Twelve Months			3.1
Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	0.5		0.5
Forward Contracts
Derivative [Line Items]
Notional amount	71.8	86.5	71.8	86.5	73.2
Forward Contracts Sell
Derivative [Line Items]
Notional amount	90.4	117.7	90.4	117.7	100.8
Fixed Interest Rate Swaps $1,100M (Tranche 1)
Derivative [Line Items]
Notional amount		1,100		1,100
Fixed Interest Rate Swaps $900M (Tranche 2)
Derivative [Line Items]
Notional amount		900		900
Fixed Interest Rate Swaps $400M (Tranche 3)
Derivative [Line Items]
Notional amount		400		400
Interest Rate Swaps Designated As Fair Value Hedges
Derivative [Line Items]
Notional amount	500	250	500	250	$ 500	$ 250
Derivative Liability, Fair Value, Gross Liability	24.9		24.9
Amount of gain (loss)	$ 0.7	$ 0.5	$ 1.9	$ 0.5

DERIVATIVE FINANCIAL INSTRUME70

DERIVATIVE FINANCIAL INSTRUMENTS (Details 1) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Copper Commodity Forward Contracts
Derivative [Line Items]
Notional amount	$ 42.8	$ 35.8	$ 38.7
Zinc Commodity Forward Contracts
Derivative [Line Items]
Notional amount	7.9	8	8
Lead Commodity Forward Contracts
Derivative [Line Items]
Notional amount	0	3.4	8.4
Natural Gas Commodity Forward Contracts
Derivative [Line Items]
Notional amount	$ 45	$ 54.4	$ 0.4

DERIVATIVE FINANCIAL INSTRUME71

DERIVATIVE FINANCIAL INSTRUMENTS (Details 2) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Derivatives, Fair Value [Line Items]
Asset derivatives	$ (14.8)	$ (21.2)	$ (3.8)
Liability derivatives	(27.2)	(29.8)	(11.7)
Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Asset derivatives	(13.6)	(21.1)	(3.7)
Liability derivatives	(27.2)	(28.6)	(9.6)
Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Asset derivatives	(1.2)	(0.1)	(0.1)
Liability derivatives	0	(1.2)	(2.1)
Interest Rate Contract | Designated as Hedging Instrument | Other Current Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	(5)	(1.9)	0
Interest Rate Contract | Designated as Hedging Instrument | Current Installments of Long-term Debt
Derivatives, Fair Value [Line Items]
Liability derivatives	(0.1)	(0.1)	0
Interest Rate Contract | Designated as Hedging Instrument | Other Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	(4.6)	(7.7)	(3.7)
Interest Rate Contract | Designated as Hedging Instrument | Long-term Debt
Derivatives, Fair Value [Line Items]
Liability derivatives	0	0	(0.3)
Interest Rate Contract | Designated as Hedging Instrument | Other Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	(24.9)	(28.5)	(6.2)
Commodity Contracts Losses | Designated as Hedging Instrument | Other Current Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	(0.9)	(1.7)	0
Commodity Contracts Losses | Designated as Hedging Instrument | Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	(2.3)	0	(4.9)
Commodity Contracts Gains | Designated as Hedging Instrument | Other Current Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	(4.9)	(13.2)	0
Commodity Contracts Gains | Designated as Hedging Instrument | Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	(0.1)	0	(1.8)
Foreign Exchange Contract | Not Designated as Hedging Instrument | Other Current Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	(1.7)	(0.6)	(0.1)
Foreign Exchange Contract | Not Designated as Hedging Instrument | Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	0	0.5	0.7
Foreign Exchange Contract Loss | Not Designated as Hedging Instrument | Other Current Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	(0.5)	(0.5)	0
Foreign Exchange Contract Loss | Not Designated as Hedging Instrument | Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	$ 0	$ (1.7)	$ (2.8)

DERIVATIVE FINANCIAL INSTRUME72

DERIVATIVE FINANCIAL INSTRUMENTS (Details 3) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss)	$ 5	$ (4.2)	$ 0.5	$ (7.7)
Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Recognized in other comprehensive loss (effective portion)	(3.7)	(4.6)	(6.8)	(3.5)
Reclassified from accumulated other comprehensive loss into income (effective portion)	2.3	(1.7)	2.4	(5.4)
Commodity Contract | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Recognized in other comprehensive loss (effective portion)	(2.4)	1.6	(7.4)	2.7
Commodity Contract | Cost of Sales | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss)	0	0	0	(0.4)
Commodity Contract | Cost of Sales | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Reclassified from accumulated other comprehensive loss into income (effective portion)	1.8	(1.7)	1.9	(5.4)
Interest Rate Swap | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Recognized in other comprehensive loss (effective portion)	(1.3)	(6.2)	0.6	(6.2)
Interest Rate Swap | Interest Expense | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Reclassified from accumulated other comprehensive loss into income (effective portion)	0.5	0	0.5	0
Interest Rate Swap | Interest Expense | Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss)	0.8	1.2	2	1.9
Foreign Exchange Contract | Selling, General and Administrative Expenses | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss)	$ 5	$ (4.2)	$ 0.5	$ (7.3)

FAIR VALUE MEASUREMENTS (Detail

FAIR VALUE MEASUREMENTS (Details Textuals) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount	$ 0
Fair Value, Assets, Level 2 to Level 1 Transfers, Amount	0
Fair Value, Liabilities, Level 1 to Level 2 Transfers, Amount	0
Fair Value, Liabilities, Level 2 to Level 1 Transfers, Amount	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3	0
Assets, Fair Value Disclosure, Nonrecurring	$ 0	$ 0	$ 0

FAIR VALUE MEASUREMENTS (Deta74

FAIR VALUE MEASUREMENTS (Details 1) - USD ($)	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	$ 9,600,000	$ 9,600,000	$ 3,700,000
Derivative Liability	25,000,000	28,600,000	6,500,000
Interest Rate Swap | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0	0	0
Derivative Liability	0	0	0
Interest Rate Swap | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	9,600,000	9,600,000	3,700,000
Derivative Liability	25,000,000	28,600,000	6,500,000
Interest Rate Swap | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0	0	0
Derivative Liability	0	0	0
Commodity Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	4,000,000	11,500,000
Derivative Liability	2,200,000		3,100,000
Commodity Contract | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0	0
Derivative Liability	0		0
Commodity Contract | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	4,000,000	11,500,000
Derivative Liability	2,200,000		3,100,000
Commodity Contract | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0	0
Derivative Liability	0		0
Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	1,200,000	100,000	100,000
Derivative Liability		1,200,000	2,100,000
Foreign Exchange Contract | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0	0	0
Derivative Liability		0	0
Foreign Exchange Contract | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	1,200,000	100,000	100,000
Derivative Liability		1,200,000	2,100,000
Foreign Exchange Contract | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	$ 0	0	0
Derivative Liability		$ 0	$ 0

FAIR VALUE MEASUREMENTS (Deta75

FAIR VALUE MEASUREMENTS (Details 2) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Long-term Debt, Fair Value	$ 3,930.8	$ 3,856.7	$ 3,893.3
Notes Payable	3,600.6	3,617.6	3,695.8
Fair Value, Inputs, Level 1
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Long-term Debt, Fair Value	0	0	0
Fair Value, Inputs, Level 2
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Long-term Debt, Fair Value	3,777.8	3,703.7	3,740.3
Fair Value, Inputs, Level 3
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Long-term Debt, Fair Value	$ 153	$ 153	$ 153

SUPPLEMENTAL GUARANTOR FINANC76

SUPPLEMENTAL GUARANTOR FINANCIAL INFORMATION (Detail Textuals) - USD ($) $ in Millions	Mar. 09, 2017	Oct. 05, 2015
Business Acquisition [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.125%
2023 Notes
Business Acquisition [Line Items]
2023 Senior Notes		$ 720
Debt Instrument, Interest Rate, Stated Percentage		9.75%
2025 Notes
Business Acquisition [Line Items]
2025 Senior Notes		$ 500
Debt Instrument, Interest Rate, Stated Percentage		10.00%

SUPPLEMENTAL GUARANTOR FINANC77

SUPPLEMENTAL GUARANTOR FINANCIAL INFORMATION (Balance Sheet)(Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Supplemental Guarantor Financial Information Balance Sheets [Line Items]
Cash and cash equivalents	$ 184.5	$ 184.5	$ 66.6	$ 392
Receivables, net	782.2	675	790.5
Intercompany receivables	0	0	0
Income taxes receivable	20.9	25.5	45.8
Inventories	666.2	630.4	636.2
Other Assets, Current	37.2	30.8	23.8
Total current assets	1,691	1,546.2	1,562.9
Property, Plant and Equipment, Net	3,627.4	3,704.9	3,793.3
Investment in subsidiaries	0	0	0
Deferred income taxes	125.2	119.5	107
Other Assets, Noncurrent	625.6	644.4	588.6
Long-term receivables—affiliates	0	0	0
Intangible Assets, Net	605.6	629.6	671.2
Goodwill	2,119.5	2,118	2,186.3	2,174.1
Total assets	8,794.3	8,762.6	8,909.3
Current installments of long-term debt	81.7	80.5	80.3
Accounts payable	656.1	570.8	536.4
Intercompany payables	0	0	0
Income taxes payable	7.1	7.5	8.2
Accrued Liabilities, Current	261.5	263.8	293.6
Total current liabilities	1,006.4	922.6	918.5
Long-term Debt, Excluding Current Maturities	3,518.9	3,537.1	3,615.5
Accrued pension liability	625.6	638.1	616.7
Deferred income taxes	1,037.6	1,032.5	1,079.3
Long-term payables—affiliates	0	0	0
Other Liabilities, Noncurrent	347.2	359.3	348.3
Total liabilities	6,535.7	6,489.6	6,578.3
Commitments and contingencies
Common Stock, Value, Issued	166.3	165.4	165.2
Additional Paid in Capital, Common Stock	2,262.7	2,243.8	2,240.3
Accumulated other comprehensive loss	(485.4)	(510)	(479.3)	(492.5)
Retained Earnings (Accumulated Deficit)	315	373.8	404.8
Total shareholders' equity	2,258.6	2,273	2,331	2,418.8
Total liabilities and shareholders' equity	8,794.3	8,762.6	8,909.3
Parent Guarantor
Supplemental Guarantor Financial Information Balance Sheets [Line Items]
Cash and cash equivalents	28.9	25.2	23.2	119.4
Receivables, net	101.7	88.3	98.2
Intercompany receivables	0	0	0
Income taxes receivable	18.8	19	35.1
Inventories	178.2	167.7	175.2
Other Assets, Current	183.1	164.7	146.1
Total current assets	510.7	464.9	477.8
Property, Plant and Equipment, Net	509.1	510.1	494.7
Investment in subsidiaries	6,082.7	6,035.2	5,957.3
Deferred income taxes	151.8	133.5	166.2
Other Assets, Noncurrent	46.9	48.1	40.4
Long-term receivables—affiliates	0	0	0
Intangible Assets, Net	0.4	0.4	0.5
Goodwill	0	0	0
Total assets	7,301.6	7,192.2	7,136.9
Current installments of long-term debt	0.8	0.6	0.6
Accounts payable	58	45.3	59.8
Intercompany payables	2,055.8	1,882.8	1,734.4
Income taxes payable	0	0	0.6
Accrued Liabilities, Current	116.1	124.9	133.4
Total current liabilities	2,230.7	2,053.6	1,928.8
Long-term Debt, Excluding Current Maturities	822.3	913.9	1,158.3
Accrued pension liability	421.7	453.7	164.1
Deferred income taxes	0	0	0
Long-term payables—affiliates	1,284.4	1,209.1	1,277.3
Other Liabilities, Noncurrent	283.9	288.9	277.4
Total liabilities	5,043	4,919.2	4,805.9
Common Stock, Value, Issued	166.3	165.4	165.2
Additional Paid in Capital, Common Stock	2,262.7	2,243.8	2,240.3
Accumulated other comprehensive loss	(485.4)	(510)	(479.3)
Retained Earnings (Accumulated Deficit)	315	373.8	404.8
Total shareholders' equity	2,258.6	2,273	2,331
Total liabilities and shareholders' equity	7,301.6	7,192.2	7,136.9
Issuer
Supplemental Guarantor Financial Information Balance Sheets [Line Items]
Cash and cash equivalents	0	0	0	0
Receivables, net	0	0	0
Intercompany receivables	2.9	0	22.3
Income taxes receivable	0	0	0
Inventories	0	0	0
Other Assets, Current	0	3.4	0
Total current assets	2.9	3.4	22.3
Property, Plant and Equipment, Net	0	0	0
Investment in subsidiaries	3,774	3,734.7	3,655
Deferred income taxes	0	0	0
Other Assets, Noncurrent	0	0	0
Long-term receivables—affiliates	2,204.3	2,194.2	2,262.4
Intangible Assets, Net	5.7	5.7	5.7
Goodwill	966.3	966.3	994.2
Total assets	6,953.2	6,904.3	6,939.6
Current installments of long-term debt	68.8	67.5	67.5
Accounts payable	0	0	0
Intercompany payables	0	29.5	0
Income taxes payable	0	0	0
Accrued Liabilities, Current	0	0	0
Total current liabilities	68.8	97	67.5
Long-term Debt, Excluding Current Maturities	2,487.4	2,413.3	2,444.8
Accrued pension liability	0	0	0
Deferred income taxes	237.9	223.6	294.7
Long-term payables—affiliates	0	0	0
Other Liabilities, Noncurrent	8.1	6.6	0
Total liabilities	2,802.2	2,740.5	2,807
Common Stock, Value, Issued	0	0	0
Additional Paid in Capital, Common Stock	4,125.7	4,125.7	4,125.7
Accumulated other comprehensive loss	0	0	0
Retained Earnings (Accumulated Deficit)	25.3	38.1	6.9
Total shareholders' equity	4,151	4,163.8	4,132.6
Total liabilities and shareholders' equity	6,953.2	6,904.3	6,939.6
Subsidiary Non-Guarantor
Supplemental Guarantor Financial Information Balance Sheets [Line Items]
Cash and cash equivalents	155.6	159.3	43.4	272.6
Receivables, net	680.5	586.7	692.3
Intercompany receivables	2,052.9	1,912.3	1,712.1
Income taxes receivable	7.2	7.3	10.7
Inventories	488	462.7	461
Other Assets, Current	7	1.2	5.4
Total current assets	3,391.2	3,129.5	2,924.9
Property, Plant and Equipment, Net	3,118.3	3,194.8	3,298.6
Investment in subsidiaries	0	0	0
Deferred income taxes	97.8	103.5	88.5
Other Assets, Noncurrent	578.7	596.3	548.2
Long-term receivables—affiliates	0	0	0
Intangible Assets, Net	599.5	623.5	665
Goodwill	1,153.2	1,151.7	1,192.1
Total assets	8,938.7	8,799.3	8,717.3
Current installments of long-term debt	12.1	12.4	12.2
Accounts payable	603.7	527.4	476.6
Intercompany payables	0	0	0
Income taxes payable	12.2	8.3	7.6
Accrued Liabilities, Current	296.6	277.5	287.9
Total current liabilities	924.6	825.6	784.3
Long-term Debt, Excluding Current Maturities	209.2	209.9	12.4
Accrued pension liability	203.9	184.4	452.6
Deferred income taxes	924.1	926.4	932.3
Long-term payables—affiliates	919.9	985.1	985.1
Other Liabilities, Noncurrent	55.2	63.8	70.9
Total liabilities	3,236.9	3,195.2	3,237.6
Common Stock, Value, Issued	14.6	14.6	15.1
Additional Paid in Capital, Common Stock	4,808.2	4,808.2	4,756.4
Accumulated other comprehensive loss	(8.6)	(7)	(21.1)
Retained Earnings (Accumulated Deficit)	887.6	788.3	729.3
Total shareholders' equity	5,701.8	5,604.1	5,479.7
Total liabilities and shareholders' equity	8,938.7	8,799.3	8,717.3
Eliminations
Supplemental Guarantor Financial Information Balance Sheets [Line Items]
Cash and cash equivalents	0	0	0	$ 0
Receivables, net	0	0	0
Intercompany receivables	(2,055.8)	(1,912.3)	(1,734.4)
Income taxes receivable	(5.1)	(0.8)	0
Inventories	0	0	0
Other Assets, Current	(152.9)	(138.5)	(127.7)
Total current assets	(2,213.8)	(2,051.6)	(1,862.1)
Property, Plant and Equipment, Net	0	0	0
Investment in subsidiaries	(9,856.7)	(9,769.9)	(9,612.3)
Deferred income taxes	(124.4)	(117.5)	(147.7)
Other Assets, Noncurrent	0	0	0
Long-term receivables—affiliates	(2,204.3)	(2,194.2)	(2,262.4)
Intangible Assets, Net	0	0	0
Goodwill	0	0	0
Total assets	(14,399.2)	(14,133.2)	(13,884.5)
Current installments of long-term debt	0	0	0
Accounts payable	(5.6)	(1.9)	0
Intercompany payables	(2,055.8)	(1,912.3)	(1,734.4)
Income taxes payable	(5.1)	(0.8)	0
Accrued Liabilities, Current	(151.2)	(138.6)	(127.7)
Total current liabilities	(2,217.7)	(2,053.6)	(1,862.1)
Long-term Debt, Excluding Current Maturities	0	0	0
Accrued pension liability	0	0	0
Deferred income taxes	(124.4)	(117.5)	(147.7)
Long-term payables—affiliates	(2,204.3)	(2,194.2)	(2,262.4)
Other Liabilities, Noncurrent	0	0	0
Total liabilities	(4,546.4)	(4,365.3)	(4,272.2)
Common Stock, Value, Issued	(14.6)	(14.6)	(15.1)
Additional Paid in Capital, Common Stock	(8,933.9)	(8,933.9)	(8,882.1)
Accumulated other comprehensive loss	8.6	7	21.1
Retained Earnings (Accumulated Deficit)	(912.9)	(826.4)	(736.2)
Total shareholders' equity	(9,852.8)	(9,767.9)	(9,612.3)
Total liabilities and shareholders' equity	$ (14,399.2)	$ (14,133.2)	$ (13,884.5)

SUPPLEMENTAL GUARANTOR FINANC78

SUPPLEMENTAL GUARANTOR FINANCIAL INFORMATION (Statements of Operations)(Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended		80 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017
Supplemental Guarantor Financial Information Statement of Operations [Line Items]
Sales	$ 1,526.5		$ 1,364		$ 3,093.6	$ 2,712.2
Operating expenses:
Cost of goods sold	1,404.1		1,236.9		2,797.8	2,412.3
Selling and administration	80		79.3		168.2	167.4
Restructuring charges	8.5	$ 8.2	8.2	$ 92.8	16.7	101	$ 166.3
Acquisition-related costs	4.4		16.3		11.4	26.5
Other operating income (expense)	0.3		(0.2)		(0.1)	10.7
Operating income	29.8		23.1		99.4	15.7
Earnings of non-consolidated affiliates	0.5		0.4		1	0.6
Equity (loss) income in subsidiaries	0		0		0	0
Interest Expense	52.5		47.6		104.9	96.1
Interest income	0.4		0.5		0.6	0.8
Loss before taxes	(21.8)		(23.6)		(3.9)	(79)
Income tax benefit	(15.9)		(22.6)		(11.4)	(40.1)
Net (loss) income	(5.9)		(1)		7.5	(38.9)
Parent Guarantor
Supplemental Guarantor Financial Information Statement of Operations [Line Items]
Sales	338.1		329.8		652.9	650.5
Operating expenses:
Cost of goods sold	294.7		285.4		569.5	560.7
Selling and administration	27.5		36		68.6	72.8
Restructuring charges	0		0.3		0	0.6
Acquisition-related costs	4.4		15.1		11.4	25.3
Other operating income (expense)	(4)		(0.6)		(4.5)	(1.1)
Operating income	7.5		(7.6)		(1.1)	(10)
Earnings of non-consolidated affiliates	0.5		0.4		1	0.6
Equity (loss) income in subsidiaries	(7.8)		7.6		18.4	(21.2)
Interest Expense	9.4		10.3		21.4	21
Interest income	2.3		0.7		3	1.5
Loss before taxes	(6.9)		(9.2)		(0.1)	(50.1)
Income tax benefit	(1)		(8.2)		(7.6)	(11.2)
Net (loss) income	(5.9)		(1)		7.5	(38.9)
Issuer
Supplemental Guarantor Financial Information Statement of Operations [Line Items]
Sales	0		0		0	0
Operating expenses:
Cost of goods sold	0		0		0	0
Selling and administration	0		0		0	0
Restructuring charges	0		0		0	0
Acquisition-related costs	0		0		0	0
Other operating income (expense)	0		0		0	0
Operating income	0		0		0	0
Earnings of non-consolidated affiliates	0		0		0	0
Equity (loss) income in subsidiaries	4.2		15.7		39.3	59.3
Interest Expense	41.9		37.8		82.8	76
Interest income	0		0		0	0
Loss before taxes	(37.7)		(22.1)		(43.5)	(16.7)
Income tax benefit	(15.5)		(14.9)		(30.7)	(28.2)
Net (loss) income	(22.2)		(7.2)		(12.8)	11.5
Subsidiary Non-Guarantor
Supplemental Guarantor Financial Information Statement of Operations [Line Items]
Sales	1,294.7		1,154.7		2,655.1	2,296
Operating expenses:
Cost of goods sold	1,215.7		1,072		2,442.7	2,085.9
Selling and administration	52.5		43.3		99.6	94.6
Restructuring charges	8.5		7.9		16.7	100.4
Acquisition-related costs	0		1.2		0	1.2
Other operating income (expense)	4.3		0.4		4.4	11.8
Operating income	22.3		30.7		100.5	25.7
Earnings of non-consolidated affiliates	0		0		0	0
Equity (loss) income in subsidiaries	0		0		0	0
Interest Expense	3.1		0.9		4	1.9
Interest income	0		1.2		0.9	2.1
Loss before taxes	19.2		31		97.4	25.9
Income tax benefit	0.6		0.5		26.9	(0.7)
Net (loss) income	18.6		30.5		70.5	26.6
Eliminations
Supplemental Guarantor Financial Information Statement of Operations [Line Items]
Sales	(106.3)		(120.5)		(214.4)	(234.3)
Operating expenses:
Cost of goods sold	(106.3)		(120.5)		(214.4)	(234.3)
Selling and administration	0		0		0	0
Restructuring charges	0		0		0	0
Acquisition-related costs	0		0		0	0
Other operating income (expense)	0		0		0	0
Operating income	0		0		0	0
Earnings of non-consolidated affiliates	0		0		0	0
Equity (loss) income in subsidiaries	3.6		(23.3)		(57.7)	(38.1)
Interest Expense	(1.9)		(1.4)		(3.3)	(2.8)
Interest income	(1.9)		(1.4)		(3.3)	(2.8)
Loss before taxes	3.6		(23.3)		(57.7)	(38.1)
Income tax benefit	0		0		0	0
Net (loss) income	$ 3.6		$ (23.3)		$ (57.7)	$ (38.1)

SUPPLEMENTAL GUARANTOR FINANC79

SUPPLEMENTAL GUARANTOR FINANCIAL INFORMATION (Statements of Comprehensive Income)(Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Supplemental Guarantor Financial Information Statements Of Comprehensive Income [Line Items]
Net income (loss)	$ (5.9)	$ (1)	$ 7.5	$ (38.9)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	15.9	(10.8)	21.9	4.7
Unrealized (losses) gains on derivative contracts, net	(3.7)	(1.8)	(5.7)	1.2
Amortization of prior service costs and actuarial losses, net	4.5	3.5	8.4	7.3
Total other comprehensive income (loss), net of tax	16.7	(9.1)	24.6	13.2
Comprehensive income (loss)	10.8	(10.1)	32.1	(25.7)
Parent Guarantor
Supplemental Guarantor Financial Information Statements Of Comprehensive Income [Line Items]
Net income (loss)	(5.9)	(1)	7.5	(38.9)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	0	0	0	0
Unrealized (losses) gains on derivative contracts, net	(3.7)	(1.8)	(5.7)	1.2
Amortization of prior service costs and actuarial losses, net	4.3	3.4	8	6.7
Total other comprehensive income (loss), net of tax	0.6	1.6	2.3	7.9
Comprehensive income (loss)	(5.3)	0.6	9.8	(31)
Issuer
Supplemental Guarantor Financial Information Statements Of Comprehensive Income [Line Items]
Net income (loss)	(22.2)	(7.2)	(12.8)	11.5
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	0	0	0	0
Unrealized (losses) gains on derivative contracts, net	0	0	0	0
Amortization of prior service costs and actuarial losses, net	0	0	0	0
Total other comprehensive income (loss), net of tax	0	0	0	0
Comprehensive income (loss)	(22.2)	(7.2)	(12.8)	11.5
Subsidiary Non-Guarantor
Supplemental Guarantor Financial Information Statements Of Comprehensive Income [Line Items]
Net income (loss)	18.6	30.5	70.5	26.6
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	15.9	(10.8)	21.9	4.7
Unrealized (losses) gains on derivative contracts, net	0	0	0	0
Amortization of prior service costs and actuarial losses, net	0.2	0.1	0.4	0.6
Total other comprehensive income (loss), net of tax	16.1	(10.7)	22.3	5.3
Comprehensive income (loss)	34.7	19.8	92.8	31.9
Eliminations
Supplemental Guarantor Financial Information Statements Of Comprehensive Income [Line Items]
Net income (loss)	3.6	(23.3)	(57.7)	(38.1)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	0	0	0	0
Unrealized (losses) gains on derivative contracts, net	0	0	0	0
Amortization of prior service costs and actuarial losses, net	0	0	0	0
Total other comprehensive income (loss), net of tax	0	0	0	0
Comprehensive income (loss)	$ 3.6	$ (23.3)	$ (57.7)	$ (38.1)

SUPPLEMENTAL GUARANTOR FINANC80

SUPPLEMENTAL GUARANTOR FINANCIAL INFORMATION (Cash Flows)(Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Supplemental Guarantor Financial Information Statements Of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities	$ 227.4	$ 186.2
Payments to Acquire Property, Plant, and Equipment	(150.9)	(137.4)
Payments to Acquire Businesses, Net of Cash Acquired	0	(69.5)
Payments under long-term supply contract	0	(85)	$ (175.7)
Proceeds from disposition of property, plant and equipment	0.1	0.4
Proceeds from Contributions from Affiliates		4.4
Net investing activities	(150.8)	(287.1)
Proceeds from Issuance of Long-term Debt	1,875	0
Long-term debt repayments	(1,890.1)	(159)
Stock options exercised	15.8	0.2
Payments of Dividends	(66.3)	(66.1)
Debt issuance costs	(11.2)	0
Intercompany Financing Activities	0
Net financing activities	(76.8)	(224.9)
Effect of exchange rate changes on cash and cash equivalents	0.2	0.4
Net decrease in cash and cash equivalents	0	(325.4)
Cash and cash equivalents, end of period	184.5	66.6	184.5
Parent Guarantor
Supplemental Guarantor Financial Information Statements Of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities	124.4	305.4
Payments to Acquire Property, Plant, and Equipment	(43.9)	(26.8)
Payments to Acquire Businesses, Net of Cash Acquired		(69.5)
Payments under long-term supply contract		0
Proceeds from disposition of property, plant and equipment	0	0.2
Proceeds from Contributions from Affiliates		4.4
Net investing activities	(43.9)	(91.7)
Proceeds from Issuance of Long-term Debt	500
Long-term debt repayments	(590.4)	(125.2)
Stock options exercised	15.8	0.2
Payments of Dividends	(66.3)	(66.1)
Debt issuance costs	(8.3)	(118.8)
Intercompany Financing Activities	72.4
Net financing activities	(76.8)	(309.9)
Effect of exchange rate changes on cash and cash equivalents	0	0
Net decrease in cash and cash equivalents	3.7	(96.2)
Cash and cash equivalents, end of period	28.9	23.2	25.2
Issuer
Supplemental Guarantor Financial Information Statements Of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities	0	0
Payments to Acquire Property, Plant, and Equipment	0	0
Payments to Acquire Businesses, Net of Cash Acquired		0
Payments under long-term supply contract		0
Proceeds from disposition of property, plant and equipment	0	0
Proceeds from Contributions from Affiliates		0
Net investing activities	0	0
Proceeds from Issuance of Long-term Debt	1,375
Long-term debt repayments	(1,299.7)	(33.8)
Stock options exercised	0	0
Payments of Dividends	0	0
Debt issuance costs	(2.9)	33.8
Intercompany Financing Activities	(72.4)
Net financing activities	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0
Net decrease in cash and cash equivalents	0	0
Cash and cash equivalents, end of period	0	0	0
Subsidiary Non-Guarantor
Supplemental Guarantor Financial Information Statements Of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities	103	(119.2)
Payments to Acquire Property, Plant, and Equipment	(107)	(110.6)
Payments to Acquire Businesses, Net of Cash Acquired		0
Payments under long-term supply contract		(85)
Proceeds from disposition of property, plant and equipment	0.1	0.2
Proceeds from Contributions from Affiliates		0
Net investing activities	(106.9)	(195.4)
Proceeds from Issuance of Long-term Debt	0
Long-term debt repayments	0	0
Stock options exercised	0	0
Payments of Dividends	0	0
Debt issuance costs	0	85
Intercompany Financing Activities	0
Net financing activities	0	85
Effect of exchange rate changes on cash and cash equivalents	0.2	0.4
Net decrease in cash and cash equivalents	(3.7)	(229.2)
Cash and cash equivalents, end of period	155.6	43.4	159.3
Eliminations
Supplemental Guarantor Financial Information Statements Of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities	0	0
Payments to Acquire Property, Plant, and Equipment	0	0
Payments to Acquire Businesses, Net of Cash Acquired		0
Payments under long-term supply contract		0
Proceeds from disposition of property, plant and equipment	0	0
Proceeds from Contributions from Affiliates		0
Net investing activities	0	0
Proceeds from Issuance of Long-term Debt	0
Long-term debt repayments	0	0
Stock options exercised	0	0
Payments of Dividends	0	0
Debt issuance costs	0	0
Intercompany Financing Activities	0
Net financing activities	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0
Net decrease in cash and cash equivalents	0	0
Cash and cash equivalents, end of period	$ 0	$ 0	$ 0