10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

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

For the quarterly period ended September 30, 2015

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

For the transition period from _______________________________ to_________________________________________

Commission File Number: 0-52105

KAISER ALUMINUM CORPORATION

(Exact name of registrant as specified in its charter)

Delaware		94-3030279
(State of incorporation)		(I.R.S. Employer Identification No.)
27422 Portola Parkway, Suite 200 Foothill Ranch, California		92610-2831
(Address of principal executive offices)		(Zip Code)
	(949) 614-1740
(Registrant’s telephone number, including area code)

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

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

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

Large accelerated filer þ	Accelerated filer o
Non-accelerated filer o  (Do not check if a smaller reporting company)	Smaller reporting company o

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

As of October 19, 2015, there were 17,739,189 shares of common stock of the registrant outstanding.

TABLE OF CONTENTS

PART I
Item 1. Financial Statements	1
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	41
Item 3. Quantitative and Qualitative Disclosures About Market Risk	53
Item 4. Controls and Procedures	54
PART II
Item 1. Legal Proceedings	55
Item 1A. Risk Factors	55
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	55
Item 3. Defaults Upon Senior Securities	56
Item 4. Mine Safety Disclosures	56
Item 5. Other Information	56
Item 6. Exhibits	56
SIGNATURES	57
INDEX OF EXHIBITS	58

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

PART I – FINANCIAL INFORMATION

Item 1.Financial Statements

CONSOLIDATED BALANCE SHEETS (UNAUDITED)

	September 30, 2015			December 31, 2014
	(In millions of dollars, except share and per share amounts)
ASSETS
Current assets:
Cash and cash equivalents	$	82.6		$	177.7
Short-term investments	30.0			114.0
Receivables:
Trade receivables – net	131.6			129.3
Other	4.4			10.9
Inventories	217.3			214.7
Prepaid expenses and other current assets	98.6			178.6
Total current assets	564.5			825.2
Property, plant and equipment – net	472.7			454.9
Net assets of Union VEBA	—			340.1
Deferred tax assets – net (including deferred tax liability relating to the Union VEBA of $0.0 and $127.0 at September 30, 2015 and December 31, 2014, respectively)	135.7			30.9
Intangible assets – net	30.9			32.1
Goodwill	37.2			37.2
Other assets	22.1			23.3
Total	$	1,263.1		$	1,743.7
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	69.3		$	81.4
Accrued salaries, wages and related expenses	38.4			39.6
Other accrued liabilities	61.4			132.8
Current portion of long-term debt	—			172.5
Short-term capital leases	0.1			0.1
Total current liabilities	169.2			426.4
Net liabilities of Salaried VEBA	15.9			17.2
Deferred tax liabilities	0.8			0.9
Long-term liabilities	86.0			58.3
Long-term debt	218.9			225.0
Total liabilities	490.8			727.8
Commitments and contingencies – Note 7
Stockholders’ equity:
Preferred stock, 5,000,000 shares authorized at both September 30, 2015 and December 31, 2014; no shares were issued and outstanding at September 30, 2015 and December 31, 2014	—			—
Common stock, par value $0.01, 90,000,000 shares authorized at both September 30, 2015 and at December 31, 2014; 21,793,040 shares issued and 17,603,730 shares outstanding at September 30, 2015; 21,197,164 shares issued and 17,607,251 shares outstanding at December 31, 2014	0.2			0.2
Additional paid in capital	1,033.6			1,028.5
Retained earnings	9.7			280.4
Treasury stock, at cost, 4,189,310 shares at September 30, 2015 and 3,589,913 shares at December 31, 2014, respectively	(242.5		)	(197.1		)
Accumulated other comprehensive loss	(28.7		)	(96.1		)
Total stockholders’ equity	772.3			1,015.9
Total	$	1,263.1		$	1,743.7

The accompanying notes to interim consolidated financial statements are an integral part of these statements.

1

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

STATEMENTS OF CONSOLIDATED INCOME (LOSS) (UNAUDITED)

	Quarter Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
	(In millions of dollars, except share and per share amounts)
Net sales	$	336.4		$	338.9		$	1,075.3		$	1,018.1
Costs and expenses:
Cost of products sold:
Cost of products sold, excluding depreciation and amortization and other items	267.3			280.4			864.4			838.8
Unrealized losses on derivative instruments	1.7			3.6			7.7			—
Depreciation and amortization	8.1			8.0			24.2			23.1
Selling, general, administrative, research and development:
Selling, general, administrative, research and development	21.1			19.0			67.4			61.3
Net periodic postretirement benefit cost (income) relating to VEBAs – Note 5	0.6			(6.0		)	1.8			(17.7		)
(Gain) loss on removal of Union VEBA net assets – Note 5	(2.9		)	—			490.9			—
Total selling, general, administrative, research and development	18.8			13.0			560.1			43.6
Other operating charges, net	—			1.3			—			1.5
Total costs and expenses	295.9			306.3			1,456.4			907.0
Operating income (loss)	40.5			32.6			(381.1		)	111.1
Other (expense) income:
Interest expense	(4.9		)	(9.7		)	(19.9		)	(27.7		)
Other (expense) income, net – Note 13	(0.9		)	2.2			(0.1		)	5.9
Income (loss) before income taxes	34.7			25.1			(401.1		)	89.3
Income tax (provision) benefit	(12.6		)	(9.2		)	151.2			(33.1		)
Net income (loss)	$	22.1		$	15.9		$	(249.9	)	$	56.2
Net income (loss) per common share:
Basic	$	1.29		$	0.90		$	(14.55	)	$	3.15
Diluted	$	1.21		$	0.85		$	(14.55	)	$	3.02
Weighted-average number of common shares outstanding (in thousands):
Basic	17,123			17,707			17,178			17,853
Diluted	18,172			18,619			17,178			18,592
Dividends declared per common share	$	0.40		$	0.35		$	1.20		$	1.05

The accompanying notes to interim consolidated financial statements are an integral part of these statements.

2

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME (LOSS) (UNAUDITED)

	Quarter Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
	(In millions of dollars)
Net income (loss)	$	22.1		$	15.9		$	(249.9	)	$	56.2
Other comprehensive income:
VEBAs:
Reclassification adjustments:
Amortization of net actuarial loss (gain)	0.3			(0.5		)	0.8			(1.4		)
Amortization of prior service cost	0.7			2.6			2.2			8.0
Removal of obligation relating to Union VEBA	—			—			106.6			—
Other comprehensive income relating to VEBAs	1.0			2.1			109.6			6.6
Available for sale securities:
Unrealized (loss) gain on available for sale securities	(0.4		)	(0.2		)	(0.7		)	0.1
Reclassification adjustments:
Reclassification of unrealized (gain) loss upon sale of available for sale securities	(0.1		)	—			0.1			(0.2		)
Other comprehensive loss relating to available for sale securities	(0.5		)	(0.2		)	(0.6		)	(0.1		)
Unrealized loss on foreign currency cash flow hedges	—			—			(0.2		)	—
Foreign currency translation (loss) gain	(0.3		)	0.1			(0.2		)	0.2
Other comprehensive income, before tax	0.2			2.0			108.6			6.7
Income tax expense related to items of other comprehensive income	(0.1		)	(0.7		)	(41.2		)	(2.4		)
Other comprehensive income, net of tax	0.1			1.3			67.4			4.3
Comprehensive income (loss)	$	22.2		$	17.2		$	(182.5	)	$	60.5

The accompanying notes to interim consolidated financial statements are an integral part of these statements.

3

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

STATEMENT OF CONSOLIDATED STOCKHOLDERS’ EQUITY (UNAUDITED)

	Common Shares Outstanding		Common Stock		Additional Paid in Capital			Retained Earnings			Treasury Stock			Accumulated Other Comprehensive Loss			Total
	(In millions of dollars, except share and per share amounts)
BALANCE, December 31, 2014	17,607,251		$	0.2	$	1,028.5		$	280.4		$	(197.1	)	$	(96.1	)	$	1,015.9
Net loss	—		—		—			(249.9		)	—			—			(249.9		)
Other comprehensive income, net of tax	—		—		—			—			—			67.4			67.4
Issuance of non-vested shares to employees and non-employee directors	62,285		—		—			—			—			—			—
Issuance of common shares to non-employee directors	2,436		—		0.2			—			—			—			0.2
Issuance of common shares to employees upon vesting of restricted stock units and performance shares	50,809		—		—			—			—			—			—
Cancellation of employee non-vested shares	(793	)	—		—			—			—			—			—
Cancellation of shares to cover employees’ tax withholdings upon vesting of non-vested shares	(35,081	)	—		(3.0		)	—			—			—			(3.0		)
Repurchase of common stock	(599,397	)	—		—			—			(45.4		)	—			(45.4		)
Issuance of stock warrants	516,220		—		—			—			—			—			—
Cash dividends on common stock ($1.20 per share)	—		—		—			(21.0		)	—			—			(21.0		)
Excess tax benefit upon vesting of non-vested shares and dividend payment on unvested shares expected to vest	—		—		1.1			—			—			—			1.1
Amortization of unearned equity compensation	—		—		6.8			—			—			—			6.8
Dividends on unvested equity awards that were canceled	—		—		—			0.2			—			—			0.2
BALANCE, September 30, 2015	17,603,730		$	0.2	$	1,033.6		$	9.7		$	(242.5	)	$	(28.7	)	$	772.3

The accompanying notes to interim consolidated financial statements are an integral part of these statements.

4

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

STATEMENTS OF CONSOLIDATED CASH FLOWS (UNAUDITED)

	Nine Months Ended
	September 30,
	2015			2014
	(In millions of dollars)
Cash flows from operating activities:
Net (loss) income	$	(249.9	)	$	56.2
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation of property, plant and equipment	23.0			21.9
Amortization of definite-lived intangible assets	1.2			1.2
Amortization of debt discount and debt issuance costs	4.2			8.8
Deferred income taxes – Note 4	(151.0		)	29.6
Excess tax benefit upon vesting of non-vested shares and dividend payment on unvested shares expected to vest	(1.1		)	(0.8		)
Non-cash equity compensation	7.0			5.4
Non-cash unrealized losses (gains) on derivative instruments	7.7			(3.6		)
Non-cash impairment charges	—			1.5
Losses on disposition of property, plant and equipment	0.2			0.1
Non-cash net periodic postretirement benefit cost (income) relating to VEBAs1	1.8			(17.7		)
Non-cash loss on removal of Union VEBA net assets1	446.7			—
Other non-cash changes in assets and liabilities	0.4			0.5
Changes in operating assets and liabilities:
Trade and other receivables	4.2			(9.6		)
Inventories	(2.6		)	3.1
Prepaid expenses and other current assets	—			(0.9		)
Accounts payable	(15.0		)	28.7
Accrued liabilities1	19.7			(2.8		)
Annual variable cash contributions to VEBAs1	(13.7		)	(16.0		)
Long-term assets and liabilities, net1	26.1			(1.9		)
Net cash provided by operating activities	108.9			103.7
Cash flows from investing activities:
Capital expenditures	(38.4		)	(39.6		)
Purchase of available for sale securities	(0.5		)	(53.4		)
Proceeds from disposition of available for sale securities	84.0			82.2
Change in restricted cash	—			(0.7		)
Net cash provided by (used in) investing activities	45.1			(11.5		)

5

	Nine Months Ended
	September 30,
	2015			2014
Cash flows from financing activities:
Repurchase of Senior Notes2	(6.1		)	—
Settlement of Convertible Notes2	(175.0		)	—
Proceeds from cash-settled call options related to settlement of Convertible Notes2	94.9			—
Payment for conversion premium related to settlement of Convertible Notes2	(94.9		)	—
Excess tax benefit upon vesting of non-vested shares and dividend payment on unvested shares expected to vest	1.1			0.8
Cancellation of shares to cover employees’ tax withholdings upon vesting of non-vested shares	(3.0		)	(2.4		)
Repurchase of common stock	(45.1		)	(28.7		)
Cash dividend paid to stockholders	(21.0		)	(19.1		)
Net cash used in financing activities	(249.1		)	(49.4		)
Net (decrease) increase in cash and cash equivalents during the period	(95.1		)	42.8
Cash and cash equivalents at beginning of period	177.7			169.5
Cash and cash equivalents at end of period	$	82.6		$	212.3

____________

¹  See Note 5 for the impact of removing the Union VEBA net assets.

²  See Note 3 for more information relating to the Senior Notes and the Convertible Notes.

The accompanying notes to interim consolidated financial statements are an integral part of these statements.

6

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

1. Summary of Significant Accounting Policies

This Quarterly Report on Form 10-Q (this "Report") should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2014. Unless the context otherwise requires, references in these notes to interim consolidated financial statements - unaudited to "Kaiser Aluminum Corporation," "we," "us," "our," "the Company" and "our Company" refer to Kaiser Aluminum Corporation and its consolidated subsidiaries.

Organization and Nature of Operations. Kaiser Aluminum Corporation specializes in the production of semi-fabricated specialty aluminum products, such as aluminum sheet and plate and extruded and drawn products, primarily used in aerospace/high strength, automotive, general engineering and other industrial end market applications. Our business is organized into one operating segment, Fabricated Products. See Note 11 for additional information regarding our reportable segment and business unit.

Principles of Consolidation and Basis of Presentation. The accompanying unaudited consolidated financial statements include the accounts of our wholly owned subsidiaries and are prepared in accordance with United States generally accepted accounting principles ("GAAP") and the rules and regulations of the Securities and Exchange Commission ("SEC") applicable for interim periods and, therefore, do not include all information and footnotes required by GAAP for complete financial statements. In management’s opinion, all adjustments (which include normal recurring adjustments) considered necessary for a fair presentation have been included. The results of operations for our interim periods are not necessarily indicative of the results of operations that may be achieved for the entire 2015 fiscal year. The financial information as of December 31, 2014 is derived from our audited consolidated financial statements and footnotes for the year ended December 31, 2014 included in our Annual Report on Form 10-K.

Use of Estimates in the Preparation of Financial Statements. The preparation of financial statements in accordance with GAAP requires the use of estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities known to exist as of the date the financial statements are published and the reported amounts of revenues and expenses during the reporting period. Uncertainties with respect to such estimates and assumptions are inherent in the preparation of our consolidated financial statements; accordingly, it is possible that the actual results could differ from these estimates and assumptions, which could have a material effect on the reported amounts of our consolidated financial position and results of operations.

Inventories. Inventories are stated at the lower of cost or market value. Finished products, work-in-process and raw material inventories are stated on the last-in, first-out ("LIFO") basis. The (shortfalls) excesses of current cost over the stated LIFO value of inventory at September 30, 2015 and December 31, 2014 was $(13.4) million and $37.6 million, respectively. The net realizable value of our inventory was approximately the stated LIFO value as of September 30, 2015. Other inventories, principally operating supplies and repair and maintenance parts, are stated at average cost. Inventory costs consist of material, labor and manufacturing overhead, including depreciation. Abnormal costs, such as idle facility expenses, freight, handling costs and spoilage, are accounted for as current period charges. All of our inventories at September 30, 2015 and December 31, 2014 were included in the Fabricated Products segment (see Note 2 for the components of inventories).

Property, Plant and Equipment – Net. Property, plant and equipment is recorded at cost (see Note 2). Construction in progress is included within Property, plant and equipment – net on the Consolidated Balance Sheets. Interest related to the construction of qualifying assets is capitalized as part of the construction costs. The aggregate amount of interest capitalized is limited to the interest expense incurred in the period. The amount of interest expense capitalized as construction in progress was $0.4 million and $0.3 million during the quarters ended September 30, 2015 and September 30, 2014, respectively. The amount of interest expense capitalized as construction in progress was $1.1 million and $2.2 million during the nine months endedSeptember 30, 2015 and September 30, 2014, respectively.

We recorded impairment charges of $1.3 million and $1.5 million during the quarter and nine months ended September 30, 2014, respectively, to reflect the scrap value of idled assets we determined not to deploy for future use. Asset impairment charges are included in Other operating charges, net, in the Statements of Consolidated Income and are included in the Fabricated Products segment.

Depreciation is computed using the straight-line method at rates based on the estimated useful lives of the various classes of assets. Capital lease assets and leasehold improvements are depreciated on a straight-line basis over the shorter of the estimated useful lives of the assets or the lease term. Depreciation expense is not included in Cost of products sold, excluding depreciation and amortization and other items, but is included in Depreciation and amortization on the Statements of Consolidated Income. For the quarters ended September 30, 2015 and September 30, 2014, we recorded depreciation expense

7

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

of $7.5 million and $7.4 million, respectively, relating to our operating facilities in the Fabricated Products segment. For the nine months endedSeptember 30, 2015 and September 30, 2014, we recorded depreciation expense of $22.6 million and $21.5 million, respectively, relating to our operating facilities in the Fabricated Products segment. An immaterial amount of depreciation expense was also recorded within All Other for all periods presented in this Report.

We classify assets as held for sale only when an asset is being actively marketed and expected to sell within 12 months. Assets held for sale are initially measured at the lesser of the assets’ carrying amount and the fair value less costs to sell.

Concentration of Labor Subject to Collective Bargaining Agreements. At September 30, 2015, approximately 63% of our employees were covered by collective bargaining agreements and 5% of our employees were covered by collective bargaining agreements with expiration dates occurring within one year from September 30, 2015.

Dividends. When we expect to be in a capital surplus position by the end of a fiscal year, cash dividends and dividend equivalents paid are charged against (Accumulated deficit) retained earnings; otherwise, dividends and dividend equivalents paid are charged against Additional paid in capital.

Foreign Currency Risk Management. From time to time, we enter into foreign currency forward contracts to protect the value of anticipated foreign currency expenses associated with cash commitments for equipment purchases. These derivative instruments are designated and qualify for cash flow hedge accounting and are adjusted to current market values each reporting period. Both realized and unrealized periodic gains and losses of derivative instruments designated as cash flow hedges are deferred in Accumulated other comprehensive loss until depreciation on the underlying equipment commences. Upon commencement, realized gains and losses are recorded in Net income (loss) as an adjustment to depreciation expense in the period in which depreciation is recognized on the underlying equipment. Depending on the time to maturity and asset or liability position, the carrying values of cash flow hedges are included in Prepaid expenses and other current assets, Other assets, Other accrued liabilities or Long-term liabilities.

Our policy requires that derivative instruments used as hedges must be effective at reducing the risk associated with the exposure being hedged and must be designated as a hedge at the inception of the instrument contract. Hedge effectiveness is assessed periodically. Any derivative instrument not designated as a hedge, or so designated but ineffective, is adjusted to market value and recognized in net income immediately. If a cash flow hedge ceases to qualify for hedge accounting treatment or is terminated, the derivative instrument would continue to be carried on the balance sheet at fair value until settled and future adjustments to the derivative instrument’s fair value would be recognized in earnings immediately. If a forecasted equipment purchase was no longer probable to occur, amounts previously deferred in accumulated other comprehensive income would be recognized immediately in earnings. See Note 8 for additional information.

We are exposed to counterparty credit risk on all of our derivative instruments. Accordingly, we have established and maintained strict counterparty credit guidelines and entered into hedges only with major financial institutions that are investment grade or better. We do not have significant exposure to any one counterparty and management believes the risk of loss is remote and in any event would not be material. Additionally, we do not require collateral under these agreements.

New Accounting Pronouncements. Accounting Standards Update ("ASU") No. 2014-12, Compensation - Stock Compensation (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period - Consensus of the FASB Emerging Issues Task Force("ASU 2014-12"), was issued in June 2014. ASU 2014-12 requires an entity to treat a performance target that affects vesting and that could be achieved after the requisite service period as a performance condition. Our adoption of this ASU in the first quarter of 2015 did not have a material impact on our consolidated financial statements.

ASU No. 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs("ASU 2015-03"), was issued in April 2015. ASU 2015-03 requires debt issuance costs related to a recognized debt liability to be presented in an entity’s balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts, instead of being presented as a deferred charge in the balance sheet. In August 2015, ASU No. 2015-15, Interest - Imputation of Interest (Subtopic 835-30) - Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements ("ASU 2015-15") was issued to address the presentation and subsequent measurement of debt issuance costs related to line-of-credit arrangements. The recognition and measurement guidance for debt issuance costs is not affected by ASU 2015-03 and ASU 2015-15. An entity is required to adopt ASU 2015-03 and ASU 2015-15 for reporting periods beginning on or after December 15, 2015. We do not expect the adoption of these ASUs to have a material impact on our consolidated financial statements.

8

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

ASU No. 2015-05, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement("ASU 2015-05"), was issued in April 2015. The ASU requires companies to perform the same assessment that vendors currently perform under ASC 985-605; that is, companies must determine whether an arrangement with its vendor contains a software license element. If so, the related fees paid are accounted for as an internal-use software intangible under ASC 350-40; if not, the arrangement is accounted for as a service contract. As a result of the issuance of ASU 2015-05, all software licenses within the scope of Subtopic 350-40 will be accounted for consistent with other licenses of intangible assets. An entity is required to adopt ASU 2015-05 for reporting periods beginning on or after December 15, 2015. We do not expect the adoption of this ASU to have a material impact on our consolidated financial statements.

ASU No. 2015-07, Fair Value Measurement (Topic 820): Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent) ("ASU 2015-07"), was issued in May 2015. This ASU removes the requirement to categorize within the fair value hierarchy table investments without readily determinable fair values in entities that elect to measure fair value using net asset value per share ("NAV") or its equivalent. ASU 2015-07 requires that these investments continue to be shown in the fair value disclosure in order to allow the disclosure to reconcile to the investment amount presented in the balance sheet. We expect to early adopt ASU 2015-07 in the quarter ending December 31, 2015 with retrospective application. We expect to modify our presentation of assets valued using NAV in the voluntary employees’ beneficiary association ("VEBA") postretirement benefit plan and Canadian Pension Plan section of our fair value hierarchy table when we adopt ASU 2015-07.

ASU No. 2015-14, Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date ("ASU 2015-14"), was issued in August 2015. ASU 2015-14 defers the effective date of ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), which was issued in May 2014 and requires an entity to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services, by one year for all entities and permits early adoption on a limited basis. We expect to adopt ASU 2014-09 for the fiscal year ending December 31, 2018 and will continue to assess the impact of the adoption on our consolidated financial statements.

2. Supplemental Balance Sheet Information

	September 30, 2015			December 31, 2014
	(In millions of dollars)
Cash and Cash Equivalents
Cash and money market funds	$	37.1		$	29.5
Commercial paper	45.5			148.2
Total	$	82.6		$	177.7
Trade Receivables – Net
Billed trade receivables	$	132.2		$	128.7
Unbilled trade receivables	0.2			1.4
Trade receivables, gross	132.4			130.1
Allowance for doubtful receivables	(0.8		)	(0.8		)
Trade receivables – net	$	131.6		$	129.3
Inventories
Finished products	$	63.1		$	73.6
Work-in-process	82.2			66.7
Raw materials	49.6			54.2
Operating supplies and repair and maintenance parts	22.4			20.2
Total	$	217.3		$	214.7

9

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

	September 30, 2015			December 31, 2014
	(In millions of dollars)
Prepaid Expenses and Other Current Assets
Current derivative assets – Notes 8 and 9	$	0.3		$	85.7
Current deferred tax assets	92.2			86.4
Short-term restricted cash	0.3			0.3
Prepaid taxes	1.1			—
Other	4.7			6.2
Total	$	98.6		$	178.6
Property, Plant and Equipment – Net
Land and improvements	$	22.7		$	22.9
Buildings and leasehold improvements	68.4			63.8
Machinery and equipment	528.1			509.8
Construction in progress	42.6			25.2
Property, plant and equipment – gross	661.8			621.7
Accumulated depreciation	(189.4		)	(166.8		)
Assets held for sale	0.3			—
Property, plant and equipment – net	$	472.7		$	454.9
Other Assets
Restricted cash	$	10.6		$	10.0
Deferred financing costs	4.5			5.9
Deferred compensation plan assets	7.0			7.3
Other	—			0.1
Total	$	22.1		$	23.3
Other Accrued Liabilities
Current derivative liabilities – Notes 8 and 9	$	16.5		$	94.9
Uncleared cash disbursements	10.1			9.1
Accrued income taxes and taxes payable	6.4			5.2
Accrued annual contribution to VEBAs	—			13.7
Accrued contingent contribution to Union VEBA – Note 5	14.2			—
Short-term environmental accruals – Note 7	2.2			2.3
Accrued interest	6.2			3.7
Short-term deferred revenue	1.5			0.2
Other	4.3			3.7
Total	$	61.4		$	132.8

10

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

	September 30, 2015		December 31, 2014
	(In millions of dollars)
Long-Term Liabilities
Derivative liabilities – Notes 8 and 9	$	2.8	$	1.9
Income tax liabilities	0.7		2.4
Workers’ compensation accruals	20.5		21.5
Long-term environmental accruals – Note 7	16.6		17.0
Long-term asset retirement obligations	4.5		4.4
Deferred compensation liabilities	7.3		7.2
Long-term deferred revenue	0.4		0.5
Long-term capital leases	0.1		0.1
Long-term portion of contingent contribution to Union VEBA – Note 5	29.9		—
Other long-term liabilities	3.2		3.3
Total	$	86.0	$	58.3

3. Debt and Credit Facility

Senior Notes

In May 2012, we issued $225.0 million principal amount of 8.25% unsecured senior notes due June 1, 2020 ("Senior Notes") at 100% of the principal amount. Interest expense, including amortization of deferred financing costs, relating to the Senior Notes was $4.8 million and $14.5 million for the quarter and nine months endedSeptember 30, 2015, respectively. Interest expense, including amortization of deferred financing costs, relating to the Senior Notes were $4.8 million and $14.5 million for the quarter and nine months endedSeptember 30, 2014, respectively. A portion of the interest relating to the Senior Notes was capitalized as construction in progress.

During the quarter ended September 30, 2015, we repurchased $6.1 million aggregate principal amount of our Senior Notes for 107.5% of the face value plus an insignificant amount of accrued interest, resulting in a loss of $0.6 million recognized within Other income, net on our statements of consolidated income (loss). As of September 30, 2015, $218.9 million aggregate principal amount of our Senior Notes remained outstanding. See Note 16 for information regarding additional Senior Notes repurchases made between October 1, 2015 through October 19, 2015.

Cash Convertible Senior Notes

Convertible Notes. In March 2010, we issued $175.0 million principal amount of 4.50% unsecured Cash Convertible Senior Notes due April 1, 2015 ("Convertible Notes"). We accounted for the cash conversion feature of the Convertible Notes as a separate derivative instrument ("Bifurcated Conversion Feature") with the fair value on the issuance date equaling the original issuance discount for purposes of accounting for the debt component of the Convertible Notes. At December 31, 2014, the carrying amount of the Convertible Notes, net of discount, was $172.5 million, of which $2.5 million was unamortized issuance discount.

The following table provides additional information regarding the Convertible Notes (in millions of dollars):

	Quarter Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Contractual coupon interest	$	—	$	2.0	$	2.0	$	5.9
Amortization of discount	—		2.3		2.4		6.7
Amortization of deferred financing costs	—		0.3		0.3		0.9
Total interest expense1	$	—	$	4.6	$	4.7	$	13.5

____________

¹  A portion of the interest relating to the Convertible Notes was capitalized as construction in progress.

11

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

Substantially all of the Convertible Notes were presented for conversion during the quarter ended March 31, 2015 and were settled in cash on April 1, 2015. The conversion value of 154.261% of par was determined over the final settlement period of 50 consecutive trading days that ended on March 27, 2015, resulting in a total payment amount to settle the Convertible Notes on April 1, 2015 of $273.8 million, comprised of a final coupon payment of $3.9 million, principal of $175.0 million and conversion premium of $94.9 million.

Convertible Notes Hedge Transactions. In connection with the issuance of our Convertible Notes, we entered into privately negotiated transactions whereby we purchased cash-settled call options ("Option Assets") relating to shares of our common stock that settled contemporaneously with the Convertible Notes. On April 1, 2015, we received Option Asset settlement proceeds of $94.9 million, which equaled the aggregate amount of cash that we paid to the holders of the converted Convertible Notes, less the principal amount thereof and interest payable thereon. Accordingly, the net cash outflow to settle our Convertible Notes and Option Assets on April 1, 2015 was $178.9 million.

Contemporaneous with the issuance of the Convertible Notes and our purchase of the Option Assets in 2010, we sold net-share-settled warrants ("Warrants") relating to approximately 3.7 million notional shares of our common stock. Beginning on July 1, 2015, the Warrants commenced settling ratably over the subsequent 120 trading day period. We delivered to the Warrant holders a number of shares for each Warrant according to the formula discussed in Note 10. As of September 30, 2015, after reflecting cumulative anti-dilution adjustments for payment of quarterly dividends paid in excess of $0.24 per share, the exercise price of the Warrants was $60.32 per share. See Note 10 and Note 16 for additional information relating to the settlement of our Warrants.

See "Fair Values of Financial Assets and Liabilities - All Other Financial Assets and Liabilities" in Note 9 for information relating to the estimated fair value of the Senior Notes, Convertible Notes, Bifurcated Conversion Feature and Option Assets.

Revolving Credit Facility

Our credit agreement with JPMorgan Chase Bank, N.A., as administrative agent, and the other financial institutions party thereto ("Revolving Credit Facility") provides us with a $300.0 million funding commitment through September 2016. We had $246.5 million of borrowing availability under the Revolving Credit Facility at September 30, 2015, based on the borrowing base determination then in effect. At September 30, 2015, there were no borrowings under the Revolving Credit Facility and $7.4 million was being used to support outstanding letters of credit, leaving $239.1 million of net borrowing availability. The interest rate applicable to any overnight borrowings under the Revolving Credit Facility would have been 4.0% at September 30, 2015.

4. Income Tax Matters

The provision for (benefit from) incomes taxes for each period presented consisted of the following (in millions of dollars):

	Quarter Ended					Nine Months Ended
	September 30,					September 30,
	2015			2014		2015			2014
Domestic	$	13.4		$	9.2	$	(149.0	)	$	32.2
Foreign	(0.8		)	—		(2.2		)	0.9
Total	$	12.6		$	9.2	$	(151.2	)	$	33.1

The income tax (benefit) provision for the quarters ended September 30, 2015 and September 30, 2014 was $12.6 million and $9.2 million, reflecting an effective tax rate of 36.3% and 36.7%, respectively. There was no material difference between the effective tax rate and the projected blended statutory tax rate for the quarters ended September 30, 2015 and September 30, 2014.

The income tax (benefit) provision for the nine months endedSeptember 30, 2015 and September 30, 2014 was $(151.2) million and $33.1 million, reflecting an effective tax rate of 37.7% and 37.0%, respectively. There was no material difference between the effective tax rate and the projected blended statutory tax rate for the nine months endedSeptember 30, 2015 and September 30, 2014.

The $(151.2) million income tax benefit for the nine months endedSeptember 30, 2015 included a $184.4 million tax benefit that was recorded as a result of removing the Union VEBA net assets and related deferred tax liabilities from our consolidated financial statements.

12

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

See Note 5 for disclosure regarding employee benefits.

Our gross unrecognized benefits relating to uncertain tax positions were $1.6 million and $2.2 million at September 30, 2015 and December 31, 2014, respectively, of which, $0.5 million and $1.1 million would go through our income tax provision and thus impact the effective tax rate at September 30, 2015 and December 31, 2014, respectively, if the gross unrecognized tax benefits were to be recognized.

We do not expect our gross unrecognized tax benefits to significantly change within the next 12 months.

5. Employee Benefits

Pension and Similar Benefit Plans. We provide contributions to (i) multi-employer pension plans sponsored by the United Steel, Paper and Forestry, Rubber, Manufacturing, Energy, Allied Industrial and Service Workers International Union AFL-CIO, CLC ("USW") and the International Association of Machinists and certain other unions at certain of our production facilities; (ii) defined contribution 401(k) savings plans for hourly bargaining unit employees and salaried and certain hourly non-bargaining unit employees; (iii) a defined benefit plan for salaried employees at our London, Ontario (Canada) facility; and (iv) a non-qualified, unfunded, unsecured plan of deferred compensation for key employees who would otherwise suffer a loss of benefits under our defined contribution plan.

VEBA Postretirement Medical Obligations. Certain retirees, their surviving spouses and eligible dependents receive medical coverage through participation in a VEBA for the benefit of certain union retirees, their surviving spouses and eligible dependents ("Union VEBA") or a VEBA that provides benefits for certain other eligible retirees, their surviving spouses and eligible dependents ("Salaried VEBA" and, together with the Union VEBA, "VEBAs"). We have no claim to the assets of the VEBAs or any obligation to fund their liabilities. The benefits paid by the VEBAs to the plan participants are made at the sole discretion of the respective VEBA trustees and are outside our control. Our only financial obligations to the VEBAs are (i) an annual variable cash contribution (described in more detail below) and (ii) reimbursement of annual administrative expenses of the VEBAs up to $0.3 million in the aggregate. Nevertheless, we have historically accounted for each of the VEBAs, and continue to account for the Salaried VEBA, as a defined benefit postretirement plan with the maximum benefits payable capped at the aggregate of the current assets of the VEBAs and the estimated future variable contributions from us and earnings thereon.

Under this accounting treatment, the funding status of the VEBAs resulted in a liability or asset position on our Consolidated Balance Sheets, even though such liability or asset has no impact on our cash flow or liquidity. The only impact that the VEBAs have on our cash flow or liquidity is with respect to our obligations to make annual variable cash contributions and to reimburse a portion of the VEBAs’ administrative expenses. The amount of annual variable cash contribution to be made by us is determined as follows: 10% of the first $20.0 million of annual cash flow (as defined; in general terms, the principal elements of cash flow are earnings before interest expense, provision for income taxes and depreciation and amortization less cash payments for, among other things, interest, income taxes and capital expenditures), plus 20% of annual cash flow (as defined) in excess of $20.0 million. Such payments may not exceed $20.0 million annually, and payments are allocated between the Union VEBA and the Salaried VEBA at 85.5% and 14.5%, respectively. Amounts owing by us to the VEBAs are recorded on our Consolidated Balance Sheets at the end of each year in Other accrued liabilities (until paid in cash), with corresponding adjustments reflecting an increase in Net assets of VEBAs, a decrease in Net liabilities of VEBAs, or a combination thereof. The annual variable contributions with respect to 2014 and 2013 totaled $13.7 million and $16.0 million at December 31, 2014 and December 31, 2013, respectively and these contributions were made during the subsequent first quarters. The variable cash contribution obligation to the Union VEBA expires in September 2017, while the obligation to the Salaried VEBA has no express termination.

In January 2015, members of the USW at our Newark, Ohio ("Newark") and Spokane, Washington ("Trentwood") facilities ratified a new five-year collective bargaining agreement ("CBA"). The CBA did not extend our obligation to make annual variable contributions to the Union VEBA. As a result of our obligation to make annual variable contributions to the Union VEBA expiring for any period after September 2017, we no longer account for the Union VEBA as a defined benefit plan and have removed the Union VEBA net assets and related deferred tax liabilities from our Consolidated Balance Sheets as of January 1, 2015. As of September 30, 2015, the estimated liability for the remaining variable cash contributions through September 2017, of $44.1 million in the aggregate was recorded in Other accrued liabilities and Long-term liabilities (see Note 2). Such amounts will be adjusted quarterly based on our most current cash flow (as previously defined) projections with the changes reflected in our Operating income (loss).

13

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

The projected benefit obligation and fair value of the plan assets of the Union VEBA as of December 31, 2014 were $391.5 million and $731.6 million, respectively. As a result of the termination of defined benefit plan accounting for the Union VEBA, the projected benefit obligation and fair value of the plan assets were removed from our consolidated financial statements, resulting in a non-cash loss of $307.8 million, net of a $184.4 million tax benefit, during the quarter ended March 31, 2015.

Components of Net Periodic Postretirement Benefit (Income) Cost. Our results of operations included the following impacts associated with the VEBAs and the Canadian defined benefit plan: (a) charges for service rendered by employees; (b) a charge for accretion of interest; (c) a benefit for the return on plan assets; and (d) amortization of net gains or losses on assets, prior service costs associated with plan amendments and actuarial differences. Net periodic postretirement benefit cost related to the Canadian defined benefit plan was not material for the quarters and nine months endedSeptember 30, 2015 and September 30, 2014. The following table presents the components of net periodic postretirement benefit cost (income) for the VEBAs and charges relating to all other employee benefit plans for the periods presented (in millions of dollars):

	Quarter Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
VEBAs:
Service cost1	$	—		$	0.6		$	—		$	1.7
Interest cost	0.7			4.2			2.1			12.5
Expected return on plan assets	(1.1		)	(12.9		)	(3.3		)	(38.5		)
Amortization of prior service cost	0.7			2.6			2.2			8.0
Amortization of net actuarial loss (gain)	0.3			(0.5		)	0.8			(1.4		)
Total net periodic postretirement benefit cost (income) relating to VEBAs	0.6			(6.0		)	1.8			(17.7		)
(Gain) loss on removal of Union VEBA net assets2	(2.9		)	—			490.9			—
Total VEBAs	(2.3		)	(6.0		)	492.7			(17.7		)
Other employee benefit plans:
Deferred compensation plan	(0.4		)	—			0.1			0.6
Defined contribution plans	1.4			1.3			7.1			6.8
Multiemployer pension plans	1.1			0.8			2.9			2.6
Total other employee benefit plans	$	2.1		$	2.1		$	10.1		$	10.0
Total	$	(0.2	)	$	(3.9	)	$	502.8		$	(7.7	)

____________

¹  The service cost related to the Salaried VEBA was insignificant for all periods presented.

²  Includes a $2.9 million adjustment during the quarter ended September 30, 2015 to decrease our contingent contribution accrual related to the Union VEBA settlement.

The following table presents the allocation of the charges (income) detailed above, by reportable segment and business unit (in millions of dollars – see Note 11):

	Quarter Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015		2014
Fabricated Products	$	2.4		$	2.0		$	9.4	$	8.9
All Other	(2.6		)	(5.9		)	493.4		(16.6		)
Total	$	(0.2	)	$	(3.9	)	$	502.8	$	(7.7	)

For all periods presented, Net periodic postretirement benefit cost (income) relating to VEBAs was included within All Other. Further, substantially all of the Fabricated Products segment’s employee benefits related charges are in Cost of products sold, excluding depreciation and amortization and other items with the remaining balance in Selling, general, administrative, research and development ("SG&A and R&D").

14

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

6. Employee Incentive Plans

Short-Term Incentive Plans ("STI Plans")

We have annual short-term incentive compensation plans for senior management and certain other employees payable at our election in cash, shares of common stock, or a combination of cash and shares of common stock. Amounts earned under STI Plans are based on our adjusted earnings before interest, taxes, depreciation and amortization ("Adjusted EBITDA"), modified for certain safety, quality, delivery, cost and individual performance factors. The Adjusted EBITDA targets are determined based on the economic value added ("EVA") of our Fabricated Products business. Most of our production facilities have similar programs for both hourly and salaried employees.

Total costs relating to STI Plans were recorded as follows for each period presented (in millions of dollars):

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Cost of products sold, excluding depreciation and amortization and other items	$	1.0	$	1.3	$	3.2	$	3.8
SG&A and R&D	1.9		1.6		7.6		6.1
Total costs recorded in connection with STI Plans	$	2.9	$	2.9	$	10.8	$	9.9

The following table presents the allocation of the charges detailed above, by segment (in millions of dollars):

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Fabricated Products	$	2.2	$	2.2	$	7.7	$	7.6
All Other	0.7		0.7		3.1		2.3
Total costs recorded in connection with STI Plans	$	2.9	$	2.9	$	10.8	$	9.9

Long-Term Incentive Programs ("LTI Programs")

General. Executive officers and other key employees of the Company, as well as directors of the Company, are eligible to participate in the Kaiser Aluminum Corporation Amended and Restated 2006 Equity and Performance Incentive Plan (as amended, "Equity Incentive Plan"). Subject to certain adjustments that may be required from time to time to prevent dilution or enlargement of the rights of participants under the Equity Incentive Plan, a total of 2,722,222 common shares have been authorized for issuance under the Equity Incentive Plan. At September 30, 2015, 707,090 common shares were available for additional awards under the Equity Incentive Plan.

Non-Vested Common Shares and Restricted Stock Units. We grant non-vested common shares to our non-employee directors, executive officers and other key employees. We also grant restricted stock units to certain employees. The restricted stock units have rights similar to the rights of non-vested common shares and each restricted stock unit that becomes vested entitles the recipient to receive one common share. For both non-vested common shares and restricted stock units, the service period is generally one year for non-employee directors and three years for executive officers and other key employees.

In addition to non-vested common shares and restricted stock units, we grant performance shares to executive officers and other key employees. Each performance share that becomes vested entitles the recipient to receive one common share.Performance shares granted prior to 2014 ("EVA-Based Performance Shares") are subject to performance conditions pertaining to our EVA performance, measured over specified three-year performance periods. The number of EVA-Based Performance Shares that will ultimately vest and result in the issuance of common shares ranges between 0% to 200% of the target number of underlying common shares (constituting approximately one half of the maximum payout) and depends on the average annual EVA achieved for the specified three-year performance period. Performance shares granted after 2013 ("TSR-Based Performance Shares") are subject to performance conditions pertaining to our total shareholder return ("TSR") over specified three-year performance periods compared to the TSR of a specified group of peer companies. The number of TSR-Based Performance Shares that will ultimately vest under both the 2014-2016 and 2015-2017 LTI Programs and result in the issuance

15

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

of common shares ranges between 0% to 200% of the target number of underlying common shares (constituting approximately one-half of the maximum payout) and depends on the percentile ranking of our TSR compared to the group of peer companies.

During the first quarter of 2015, a portion of the EVA-Based Performance shares granted under the 2012-2014 LTI Program vested (see "Summary of Activity" below). The vesting of performance shares resulting in the issuance and delivery of common shares, if any, under the 2013-2015, 2014-2016 and 2015-2017 LTI Programs will occur in 2016, 2017 and 2018, respectively.

Non-Cash Compensation Expense. Compensation expense relating to all awards under the Equity Incentive Plan is included in SG&A and R&D. Non-cash compensation expense by type of award under LTI Programs were as follows for each period presented (in millions of dollars):

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Non-vested common shares and restricted stock units	$	1.1	$	0.5	$	3.3	$	2.8
EVA-Based Performance Shares	0.1		—		0.8		1.0
TSR-Based Performance Shares	1.0		0.4		2.7		1.4
Total non-cash compensation expense	$	2.2	$	0.9	$	6.8	$	5.2

The following table presents the allocation of the charges detailed above, by segment (in millions of dollars):

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Fabricated Products	$	0.8	$	0.5	$	2.4	$	2.6
All Other	1.4		0.4		4.4		2.6
Total non-cash compensation expense	$	2.2	$	0.9	$	6.8	$	5.2

Unrecognized Gross Compensation Cost Data. The following table presents unrecognized gross compensation cost data by type of award as of September 30, 2015:

	Unrecognized gross compensation costs (in millions of dollars)		Expected period (in years) over which the remaining gross compensation costs will be recognized
Non-vested common shares and restricted stock units	$	6.9	2.0
EVA-Based Performance Shares	$	0.6	0.5
TSR-Based Performance Shares	$	8.8	2.1

Summary of Activity. A summary of the activity with respect to non-vested common shares, restricted stock units, EVA-Based Performance Shares and TSR-Based Performance Shares for the nine months endedSeptember 30, 2015 was as follows:

16

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

	Non-Vested Common Shares				Restricted Stock Units				EVA-Based Performance Shares				TSR-Based Performance Shares
	Shares		Weighted-Average Grant-Date Fair Value per Share		Units		Weighted-Average Grant-Date Fair Value per Unit		Shares		Weighted-Average Grant-Date Fair Value per Share		Shares		Weighted-Average Grant-Date Fair Value per Share
Outstanding at December 31, 2014	158,770		$	59.88	5,357		$	59.71	353,576		$	50.35	150,223		$	83.18
Granted1	62,285		72.09		2,325		69.83		—		—		150,424		95.68
Vested	(58,241	)	52.76		(2,161	)	52.91		(48,648	)	44.48		—		—
Forfeited1	(793	)	67.83		—		—		(432	)	57.54		(770	)	89.12
Canceled1	—		—		—		—		(146,016	)	44.48		—		—
Outstanding at September 30, 2015	162,021		$	67.09	5,521		$	66.64	158,480		$	57.75	299,877		$	89.43

____________

¹  For EVA-Based Performance Shares and TSR-Based Performance Shares, the number of shares granted and forfeited are presented at their maximum payout; and the number of shares canceled includes the number of shares that did not vest due to EVA performance results falling below those required for maximum payout.

Stock Options. We have fully-vested stock options that were granted in 2007. There were 16,645 fully-vested options outstanding as of September 30, 2015 and December 31, 2014, in each case exercisable to purchase common shares at $80.01 per share and having a remaining contractual life of 1.50 and 2.25 years, respectively. The average grant date fair value of the options was $39.90. No options were granted, exercised or forfeited during the nine months endedSeptember 30, 2015.

Vested Stock. From time to time, we issue common shares to non-employee directors electing to receive common shares in lieu of all or a portion of their annual retainer fees. The fair value of these common shares is based on the fair value of the shares at the date of issuance and is immediately recognized in earnings as a period expense. For each nine month period ended September 30, 2015 and September 30, 2014, we recorded $0.2 millionrelating to common shares granted to non-employee directors in lieu of all or a portion of their annual retainer fees.

Under the Equity Incentive Plan, participants may elect to have us withhold common shares to satisfy minimum statutory tax withholding obligations arising in connection with the exercise of stock options and vesting of non-vested shares, restricted stock units and performance shares. We cancel any such shares withheld on the applicable vesting dates or earlier dates when service requirements are satisfied, which correspond to the times at which income to the employee is recognized. When we withhold these common shares, we are required to remit to the appropriate taxing authorities the fair value of the shares withheld as of the vesting date. During the nine months ended September 30, 2015 and September 30, 2014, 35,081 and 33,696 common shares, respectively, were withheld and canceled for this purpose. The withholding of common shares by us could be deemed a purchase of the common shares.

7. Commitments and Contingencies

Commitments. We have a variety of financial commitments, including purchase agreements, forward foreign exchange and forward sales contracts, indebtedness (and related Warrants) and letters of credit (see Note 3 and Note 8).

There were no material changes to our scheduled minimum rental commitments during the nine months endedSeptember 30, 2015. During the nine months endedSeptember 30, 2015, our contractual obligations for 2015 increased by $33.3 million, consisting of $26.2 million in raw material related purchase obligations and $7.1 million in firm commitments for equipment purchases. Additionally, our contractual obligations for 2016 and 2017 increased by $13.4 million and $6.7 million, respectively. The increase for 2016 consists of $6.5 million in raw material related purchase obligations, $5.3 million in firm commitments for equipment purchases and $1.6 million in firm commitments for energy purchases. The increase for 2017 consists of $0.5 million in raw material related purchase obligations, $0.1 million in firm commitments for equipment purchases and $6.1 million in firm commitments for energy purchases.

Environmental Contingencies. We are subject to a number of environmental laws and regulations, to potential fines or penalties assessed for alleged breaches of such laws and regulations and to potential claims based upon such laws and regulations.

17

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

We have established procedures for regularly evaluating environmental loss contingencies. Our environmental accruals represent our undiscounted estimate of costs reasonably expected to be incurred based on presently enacted laws and regulations, existing requirements, currently available facts, existing technology and our assessment of the likely remediation actions to be taken.

In 2012, we submitted a final feasibility study to the Washington State Department of Ecology ("Washington State Ecology") that included recommendations for remediation alternatives primarily to address the historical use of oils containing polychlorinated biphenyls, ("PCBs") at our Trentwood facility. We also signed an amended work order in 2012 with Washington State Ecology allowing certain remediation activities to begin the initiation of a treatability study in regards to proposed PCB remediation methods. We began implementation of certain approved sections of the work plan in 2013 and throughout 2014, completing a number of these sections in 2014. We continue to work with Washington State Ecology in developing the implementation plans for the remaining remediation activity as well as receiving final approval for the sections of the work plan completed to date. 

During 2013, at the request of the Ohio Environmental Protection Agency ("OEPA"), we initiated an investigational study of the Newark facility related to historical on-site waste disposal. During 2014, we completed a number of preliminary steps in the preparation of completing the final risk assessment and feasibility study, both of which are subject to review and approval by the OEPA. As this work continues and progresses to a risk assessment and feasibility study, we will establish and update the estimates for probable and estimable remediations, if any. The actual and final cost for remediation will not be fully determinable until a final feasibility study is submitted and accepted by the OEPA and work plans are prepared, which is expected to occur within the next 18 to 24 months.

At September 30, 2015, our environmental accrual of $18.8 million represented our estimate of the incremental remediation cost based on (i) proposed alternatives in the final feasibility study related to our Trentwood facility; (ii) currently available facts with respect to our Newark facility; and (iii) facts related to certain other locations owned or formerly owned by us. In accordance with approved and proposed remediation action plans, we expect that the implementation and ongoing monitoring could occur over a period of 30 or more years.

As additional facts are developed, feasibility studies are completed, draft remediation plans are modified, necessary regulatory approvals for the implementation of remediation are obtained, alternative technologies are developed, and/or other factors change, there may be revisions to management’s estimates and actual costs may exceed the current environmental accruals. We believe at this time that it is reasonably possible that undiscounted costs associated with these environmental matters may exceed current accruals by amounts that could be, in the aggregate, up to an estimated $24.7 million over the remediation period. It is reasonably possible that our recorded estimate may change in the next 12 months.

Other Contingencies. We are party to various lawsuits, claims, investigations and administrative proceedings that arise in connection with past and current operations. We evaluate such matters on a case-by-case basis, and our policy is to vigorously contest any such claims we believe are without merit. We accrue for a legal liability when it is both probable that a liability has been incurred and the amount of the loss is material and reasonably estimable. Quarterly, in addition to when changes in facts and circumstances require it, we review and adjust these accruals to reflect the impacts of negotiations, settlements, rulings, advice of legal counsel and other information and events pertaining to a particular case. While uncertainties are inherent in the final outcome of such matters and it is presently impossible to determine the actual cost that may ultimately be incurred, we believe that we have sufficiently accrued for such matters and that the ultimate resolution of pending matters will not have a material impact on our consolidated financial position, operating results, or liquidity.

8. Derivative Financial Instruments and Related Hedging Programs

Overview. In conducting our business, we enter into derivative transactions, including forward contracts and options, to limit our economic (i.e. cash) exposure resulting from (i) metal price risk related to our sale of fabricated aluminum products and the purchase of metal used as raw material for our fabrication operations; (ii) energy price risk relating to fluctuating prices of natural gas and electricity used in our production processes; and (iii) foreign currency requirements with respect to our foreign subsidiaries and cash commitments for equipment purchases denominated in foreign currency.

Our derivative activities are overseen by a hedging committee ("Hedging Committee"), which is composed of our chief executive officer, chief financial officer, chief accounting officer, treasurer and vice president, commodity risk management and other officers and employees selected by the chief executive officer.The Hedging Committee meets regularly to review derivative positions and strategy and reports to our Board of Directors on the scope of its activities.

Hedges of Operational Risks

Designated Foreign Currency Cash Flow Hedges. We are exposed to foreign currency exchange risk related to firm price agreements for equipment purchases from foreign manufacturers. Such agreements require that we make payments in foreign currency to the vendor over time based on milestone achievements. We use foreign currency forward contracts in order to mitigate the exposure to currency exchange rate fluctuations related to these purchases. The timing and amounts of the forward contract settlements are designed to line up with the timing and amounts of scheduled payments to the foreign equipment manufacturers and are therefore expected to be highly effective hedges. As of September 30, 2015, we had open forward contracts designated as cash flow hedges to purchase euros with maturity dates between one and 15 months. The notional amounts of these foreign currency forward contracts totaled 7.3 million euros at September 30, 2015 with an average contract exchange rate of 1.14. The effective portion of the changes in fair value on these instruments is recorded within Other comprehensive income (loss) and is reclassified into the Statements of Consolidated Income on the same line item and the same period in which the underlying equipment is depreciated. We had no such reclassifications into earnings during the quarter ended September 30, 2015 and anticipate no such reclassifications for the next 12 months. For the nine months endedSeptember 30, 2015, we recorded an unrealized loss of $0.2 million on the effective portions of our designated foreign currency cash flow hedges. There were no gains or losses recorded on these hedges during the quarter endedSeptember 30, 2015 and no ineffectiveness was incurred on these hedges during the quarter and nine months endedSeptember 30, 2015.

Non-Designated Hedges of Operational Risks. Our pricing of fabricated aluminum products is generally intended to lock in a conversion margin (representing the value added from the fabrication process(es)) and to pass through metal price fluctuations to our customers. In certain instances, we enter into firm-price arrangements with our customers for stipulated volumes to be delivered in the future. Additionally, for some of our higher value added products sold on a spot basis, the pass through of metal price movements can sometimes lag by as much as several months, with a favorable impact to us when metal prices decline and an adverse impact to us when metal prices increase. Because we generally purchase primary and secondary aluminum on a floating price basis, the volume that we have committed to sell to our customers under a firm-price arrangement and the lag in passing through metal price movements to customers on some of our higher value added products sold on a spot basis create metal price risk for us. We use third-party hedging instruments to limit exposure to metal price risk related to firm-price customer sales contracts and the metal pass through lag on some of our products. See Note 9 for additional information regarding our material derivative positions relating to hedges of operational risk, and their respective fair values.

A majority of our derivative contracts relating to hedges of operational risks contain liquidity based thresholds that could require us to provide additional collateral in the event our liquidity were to fall below specified levels. To minimize the exposure to additional collateral requirements related to our liability hedge positions, we allocate hedging transactions among our counterparties, use options as part of our hedging activities, or both. The aggregate fair value of our derivative instruments that were in a net liability position was $18.5 million and $11.4 million at September 30, 2015 and December 31, 2014, respectively.

We regularly review the creditworthiness of our derivative counterparties and do not expect to incur significant loss from the failure of any counterparties to perform under any agreements.

During the nine months endedSeptember 30, 2015 and September 30, 2014, total Fabricated Products shipments that contained firm-price terms were (in millions of pounds) 148.6 and 109.3, respectively. At September 30, 2015, the Fabricated Products segment held contracts for the delivery of fabricated aluminum products that had the effect of creating price risk on anticipated purchases of aluminum for the remainder of 2015 and 2016, totaling approximately (in millions of pounds) 52.7 and 93.8, respectively.

Hedges Relating to the Convertible Notes

As described in Note 3, we issued $175.0 million principal amount of Convertible Notes due on April 1, 2015, which could only be settled in cash. The conversion feature of the Convertible Notes was required to be bifurcated from the Convertible Notes and treated as a separate derivative instrument. In order to offset the cash flow risk associated with the Bifurcated Conversion Feature, we purchased Option Assets that settled on April 1, 2015. The Option Assets were accounted for as derivative instruments. The cash we received on April 1, 2015 from the settlement of the Option Assets equaled and offset the cash that we paid to the holders of any converted Convertible Notes in excess of the principal amount thereof and interest payable thereon on April 1, 2015. See Note 9 for additional information regarding the fair values of the Bifurcated Conversion Feature and the Option Assets.

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NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

Realized and Unrealized Gains and Losses. Realized and unrealized (losses) gains associated with all derivative contracts consisted of the following for each period presented (in millions of dollars):

	Quarter Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Included in Other Comprehensive Income (Loss):
Unrealized (losses):
Foreign Currency	$	—		$	—		$	(0.2	)	$	—
Included in Statements of Consolidated Income (Loss):
Realized (losses) gains1:
Aluminum	(9.0		)	3.1			(18.8		)	5.2
Natural Gas	(1.2		)	(0.1		)	(3.8		)	1.1
Electricity	(0.3		)	0.1			(1.4		)	0.1
Total realized (losses) gains	$	(10.5	)	$	3.1		$	(24.0	)	$	6.4
Unrealized (losses)2:
Non-designated hedges of operational risk:
Aluminum	$	(0.3	)	$	(1.0	)	$	(8.8	)	$	1.3
Natural Gas	(1.0		)	(1.6		)	(0.2		)	(1.0		)
Electricity	(0.4		)	(1.0		)	1.3			(0.3		)
Foreign Currency	—			0.1			—			—
Total non-designated hedges of operational risk	(1.7		)	(3.5		)	(7.7		)	—
Option Assets relating to the Convertible Notes3	—			12.9			10.2			19.8
Bifurcated Conversion Feature of the Convertible Notes3	—			(10.7		)	(10.2		)	(16.2		)
Total unrealized (losses) gains	$	(1.7	)	$	(1.3	)	$	(7.7	)	$	3.6

______________________

¹  Realized (losses) gains on hedges of operational risk are recorded within Cost of products sold, excluding depreciation, amortization and other items.

²  Unrealized (losses) on hedges of operational risk are recorded within Unrealized losses on derivative instruments.

³  Unrealized (losses) gains on financial derivatives are recorded within Other income, net.

The following table summarizes our material derivative positions at September 30, 2015:

Aluminum	Maturity Period (month/year)	Notional Amount of contracts (mmlbs)
Fixed price purchase contracts	10/15 through 12/16	148.9
Fixed price sales contracts	10/15 through 10/16	2.4
Midwest premium swap contracts1	10/15 through 12/16	87.8

Natural Gas2	Maturity Period (month/year)	Notional Amount of contracts (mmbtu)
Fixed price purchase contracts	10/15 through 12/18	6,820,000

Electricity3	Maturity Period (month/year)	Notional Amount of contracts (Mwh)
Fixed price purchase contracts	10/15 through 12/15	44,180

Euro	Maturity Period (month/year)	Notional Amount of contracts (euro)
Fixed price purchase contracts	11/15 through 12/16	7,315,000

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NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

______________________

¹  Regional premiums represent the premium over the London Metal Exchange price for primary aluminum which is incurred on our purchases of primary aluminum.

²  As of September 30, 2015, we had Henry Hub NYMEX-based hedge positions in place to cover exposure to fluctuations in prices for approximately 76%, 75%, 57% and 11% of the expected natural gas purchases for the remainder of 2015, 2016, 2017 and 2018, respectively.

³  As of September 30, 2015, we had Mid-C International Commodity Exchange-based hedge positions, as well as physical delivery commitments with energy companies, in place to cover our exposure to fluctuations in electricity prices for approximately 54% of the expected electricity purchases for the remainder of 2015 and each of 2016 and 2017.

We enter into derivative contracts with counterparties, some of which are subject to enforceable master netting arrangements and some of which are not. We reflect the fair value of our derivative contracts on a gross basis on the Consolidated Balance Sheets (see Note 2).

The following tables present offsetting information regarding our derivatives by type of counterparty as of September 30, 2015 (in millions of dollars):

Derivative Assets and Collateral Held by Counterparty
							Gross Amounts Not Offset in the Consolidated Balance Sheets
	Gross Amounts of Recognized Assets		Gross Amounts Offset in the Consolidated Balance Sheets		Net Amounts of Assets Presented in the Consolidated Balance Sheets		Financial Instruments		Cash Collateral Received		Net Amount
Counterparty (with netting agreements)	$	0.3	$	—	$	0.3	$	0.3	$	—	$	—
Total	$	0.3	$	—	$	0.3	$	0.3	$	—	$	—

Derivative Liabilities and Collateral Held by Counterparty
									Gross Amounts Not Offset in the Consolidated Balance Sheets
	Gross Amounts of Recognized Liabilities			Gross Amounts Offset in the Consolidated Balance Sheets		Net Amounts of Liabilities Presented in the Consolidated Balance Sheets			Financial Instruments			Cash Collateral Pledged		Net Amount
Counterparty (with netting agreements)	$	(10.9	)	$	—	$	(10.9	)	$	(0.3	)	$	—	$	(10.6	)
Counterparty (without netting agreements)	(0.5		)	—		(0.5		)	—			—		(0.5		)
Counterparty (with partial netting agreements)	(7.9		)	—		(7.9		)	—			—		(7.9		)
Total	$	(19.3	)	$	—	$	(19.3	)	$	(0.3	)	$	—	$	(19.0	)

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NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

The following tables present offsetting information regarding our derivatives by type of counterparty as of December 31, 2014 (in millions of dollars):

Derivative Assets and Collateral Held by Counterparty
							Gross Amounts Not Offset in the Consolidated Balance Sheets
	Gross Amounts of Recognized Assets		Gross Amounts Offset in the Consolidated Balance Sheets		Net Amounts of Assets Presented in the Consolidated Balance Sheets		Financial Instruments		Cash Collateral Received		Net Amount
Counterparty (with netting agreements)	$	0.9	$	—	$	0.9	$	0.8	$	—	$	0.1
Counterparty (without netting agreements)1	84.8		—		84.8		—		—		84.8
Total	$	85.7	$	—	$	85.7	$	0.8	$	—	$	84.9

Derivative Liabilities and Collateral Held by Counterparty
									Gross Amounts Not Offset in the Consolidated Balance Sheets
	Gross Amounts of Recognized Liabilities			Gross Amounts Offset in the Consolidated Balance Sheets		Net Amounts of Liabilities Presented in the Consolidated Balance Sheets			Financial Instruments			Cash Collateral Pledged		Net Amount
Counterparty (with netting agreements)	$	(8.0	)	$	—	$	(8.0	)	$	(0.8	)	$	—	$	(7.2	)
Counterparty (without netting agreements)1	(85.0		)	—		(85.0		)	—			—		(85.0		)
Counterparty (with partial netting agreements)	(3.8		)	—		(3.8		)	—			—		(3.8		)
Total	$	(96.8	)	$	—	$	(96.8	)	$	(0.8	)	$	—	$	(96.0	)

_________________

¹  Such amounts include the fair value of the Bifurcated Conversion Feature and Option Assets at December 31, 2014 (see Note 9).

9. Fair Value Measurements

Overview

We apply the fair value hierarchy established by GAAP for the recognition and measurement of certain financial assets and liabilities. An asset or liability’s fair value classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement. In determining fair value, we utilize valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible, and consider counterparty risk in our assessment of fair value.

The fair values of financial assets and liabilities are evaluated and measured on a recurring basis. As part of that evaluation process, we review the underlying inputs that are significant to the fair value measurement of financial instruments to determine if a transfer among hierarchy levels is appropriate. We historically have not had significant transfers into or out of each hierarchy level.

Financial assets and liabilities that we measure at fair value as required by GAAP include: (i) our derivative instruments; (ii) the plan assets of the VEBAs and our Canadian defined benefit pension plan measured annually at December 31; and (iii) available for sale securities, consisting of debt investment securities and investments related to our deferred compensation plan (see Note 5). We record certain other financial assets and liabilities at carrying value (see the tables below for the fair value disclosure of those assets and liabilities).

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NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

The majority of our non-financial assets and liabilities, which include goodwill, intangible assets, inventories and property, plant and equipment, are not required to be measured at fair value on a recurring basis. However, if certain triggering events occur (or at least annually for goodwill), an evaluation of a non-financial asset or liability is required, potentially resulting in an adjustment to the carrying amount of such asset or liability.

Fair Values of Financial Assets and Liabilities

Derivative Assets and Liabilities. Our derivative contracts are valued at fair value using significant observable and unobservable inputs.

Commodity, Energy and Foreign Currency Derivatives - The fair values of a majority of these derivative contracts are based upon trades in liquid markets. Valuation model inputs can generally be verified, and valuation techniques do not involve significant judgment. The fair values of such financial instruments are generally classified within Level 2 of the fair value hierarchy. We, however, have some derivative contracts that do not have observable market quotes. For these financial instruments, management uses significant unobservable inputs (e.g., information concerning regional premiums for swaps). Where appropriate, valuations are adjusted for various factors, such as bid/offer spreads. The fair values of these financial instruments are classified as Level 3 in the fair value hierarchy.

Bifurcated Conversion Feature and Option Assets -At December 31, 2014, the fair value of the Bifurcated Conversion Feature was classified as Level 2 in the fair value hierarchy and measured as the difference in the estimated fair value of the Convertible Notes (based on the trading price of the Convertible Notes) and the estimated fair value of the Convertible Notes without the cash conversion feature (present value of the series of the remaining fixed income cash flows under the Convertible Notes, with a maturity of April 1, 2015). Due to the short duration before maturity, management concluded that the fair value of the Option Assets should equal the fair value of the Bifurcated Conversion Feature as of December 31, 2014. As of December 31, 2014, the Bifurcated Conversion Feature and Option Assets were included in the Consolidated Balance Sheet as a portion of Other accrued liabilities and Prepaid expenses and other current assets, respectively. As of September 30, 2015, all balances related to the Convertible Notes, Bifurcated Conversion Feature and Option Assets had been settled.

The aggregate fair value of our derivatives, recorded on the Consolidated Balance Sheets at September 30, 2015 and December 31, 2014, was a net liability of $19.0 million and $11.1 million, respectively. The increase in net liability position during the quarter ended September 30, 2015 was primarily due to changes in the underlying commodity and energy prices, as well as settlements of asset positions during such period. Changes in the fair value of our derivative contracts relating to non-designated hedges of operational activities are reflected in Operating income (loss) (see Note 8).

VEBA and Canadian Pension Plan Assets. The plan assets of the VEBAs and our Canadian pension plan are measured annually on December 31 and reflected in our Consolidated Balance Sheets at fair value. In determining the fair value of the plan assets at each annual period end, we utilize primarily the results of valuations supplied by the investment advisors responsible for managing the assets of each plan, which we independently review for reasonableness. With respect to the VEBAs, the investment advisors providing the valuations are engaged by the VEBA trustees. As previously discussed, in January 2015, members of the USW at our Newark and Trentwood facilities ratified a new five-year CBA, which did not did not extend our obligation to make annual variable contributions to the Union VEBA for any period after September 2017. As a result of the expiration of our obligation to make annual variable contributions to the Union VEBA, we removed the assets of the Union VEBA from our Consolidated Balance Sheets during the quarter ended March 31, 2015 based on the valuation at December 31, 2014 (See Note 5).

Available for Sale Securities. We hold debt investment securities. The fair value of the debt investment securities, which consist of commercial paper and corporate bonds, is determined based on valuation models that use observable market data. At September 30, 2015, the remaining maturity period with respect to short-term investments ranged from approximately five to seven months. We review our debt investment portfolio for other-than-temporary impairment at least quarterly or when there are changes in credit risk or other potential valuation concerns exists. At September 30, 2015 and September 30, 2014, the total unrealized loss, net of tax, included in accumulated other comprehensive income was immaterial and was not other-than-temporarily impaired. We believe that it is probable that the principal and interest will be collected in accordance with the contractual terms, and that the unrealized losses on these securities were due to changes in normal market fluctuations, and were not due to increased credit risk or other valuation concerns. In addition to debt investment securities, we also hold assets in various investment funds at certain registered investment companies in connection with our deferred compensation program (see Note 5). Such assets are accounted for as available for sale securities and are measured and recorded at fair value based on the net asset value of the investment funds on a recurring basis. The fair value input of the available for sale securities is

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NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

considered either a Level 1 or Level 2 input depending on whether the debt security or investment fund is traded on a public exchange. The amortized cost for available for sale securities approximates their fair value.

All Other Financial Assets and Liabilities. We believe that the fair value of our cash and cash equivalents, accounts receivable, accounts payable and accrued liabilities approximate their respective carrying values due to their short maturities and nominal credit risk.

The fair values of the Convertible Notes at December 31, 2014 and the Senior Notes at both September 30, 2015 and December 31, 2014 are based on their trading prices at each respective period end date and are considered Level 1 inputs in the fair value hierarchy (see Note 3 for the carrying values of the Convertible Notes and the Senior Notes). The Convertible Notes were settled on April 1, 2015.

The following table presents our financial instruments, classified under the appropriate level of the fair value hierarchy, as of the period presented (in millions of dollars):

	September 30, 2015
	Level 1			Level 2			Level 3			Total
FINANCIAL ASSETS:
Derivative Instruments (Non-Designated Hedges):
Aluminum -
Fixed price sales contracts	$	—		$	0.2		$	—		$	0.2
Midwest premium swap contracts	—			—			0.1			0.1
All Other Financial Assets:
Cash and cash equivalents	37.1			45.5			—			82.6
Short-term investments	—			30.0			—			30.0
Deferred compensation plan asset	—			7.0			—			7.0
Total assets	$	37.1		$	82.7		$	0.1		$	119.9
FINANCIAL LIABILITIES:
Derivative Instruments (Non-Designated Hedges):
Aluminum -
Fixed price purchase contracts	$	—		$	(10.3	)	$	—		$	(10.3	)
Midwest premium swap contracts	—			—			(2.0		)	(2.0		)
Natural Gas - Fixed price purchase contracts	—			(6.4		)	—			(6.4		)
Electricity - Fixed price purchase contracts	—			(0.4		)	—			(0.4		)
Derivative Instruments (Designated Hedges):
Foreign Currency - Euro forward purchase contracts	—			(0.2		)	—			(0.2		)
All Other Financial Liabilities:
Senior Notes	(233.0		)	—			—			(233.0		)
Total liabilities	$	(233.0	)	$	(17.3	)	$	(2.0	)	$	(252.3	)

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NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

The following table presents our financial instruments, classified under the appropriate level of the fair value hierarchy, as of the period presented (in millions of dollars):

	December 31, 2014
	Level 1			Level 2			Level 3		Total
FINANCIAL ASSETS:
Derivative Instruments (Non-Designated Hedges):
Aluminum - Midwest premium swap contracts	$	—		$	—		$	1.0	$	1.0
Hedges Relating to the Convertible Notes - Option Assets	—			84.7			—		84.7
All Other Financial Assets:
Cash and cash equivalents	29.5			148.2			—		177.7
Short-term investments	—			114.0			—		114.0
Deferred compensation plan asset	—			7.3			—		7.3
Total assets	$	29.5		$	354.2		$	1.0	$	384.7
FINANCIAL LIABILITIES:
Derivative Instruments (Non-Designated Hedges):
Aluminum - Fixed price purchase contracts	$	—		$	(4.2	)	$	—	$	(4.2	)
Natural Gas - Fixed price purchase contracts	—			(6.2		)	—		(6.2		)
Electricity - Fixed price purchase contracts	—			(1.7		)	—		(1.7		)
Hedges Relating to the Convertible Notes - Bifurcated Conversion Feature	—			(84.7		)	—		(84.7		)
All Other Financial Liabilities:
Senior Notes	(244.5		)	—			—		(244.5		)
Convertible Notes, including Bifurcated Conversion Feature	(263.3		)	—			—		(263.3		)
Total liabilities	$	(507.8	)	$	(96.8	)	$	—	$	(604.6	)

Financial instruments classified as Level 3 in the fair value hierarchy represent Midwest premium swap contracts for which at least one significant unobservable input in the valuation model is a management estimate. This is necessary due to the lack of an exchange traded product with observable market pricing data. Fair value was determined using a forward curve based on the average pricing quotes from our trading counterparties and applying a discount factor based on the risk free interest rate.

The following table presents quantitative information for Level 3 Midwest premium derivative contracts:

	Fair Value at September 30, 2015 (in millions of dollars)			Valuation technique	Unobservable input	Range ($ in unit price)
Assets:
Midwest premium contracts	$	0.1		Discounted fair value	Forward price curve	$0.070 per metric ton in Oct 2015 to $0.063 per metric ton in Dec 2016
Liabilities:
Midwest premium contracts	$	(2.0	)	Discounted fair value	Forward price curve	$0.070 per metric ton in Oct 2015 to $0.063 per metric ton in Dec 2016

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NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

The following table presents a reconciliation of activity for the Midwest premium derivative contracts on a net basis (in millions of dollars):

	Level 3
Balance at December 31, 2014	$	1.0
Total realized/unrealized losses included in:
Cost of goods sold excluding depreciation and amortization and other items and Unrealized losses on derivative instruments	(3.9		)
Transactions involving Level 3 derivative contracts:
Purchases	(5.4		)
Sales	—
Issuances	—
Settlements	6.4
Transactions involving Level 3 derivatives — net	1.0
Transfers in and/or out of Level 3 valuation hierarchy	—
Balance at September 30, 2015	$	(1.9	)
Total losses included in Unrealized losses on derivative instruments, attributable to the change in unrealized gains/losses relating to derivative contracts held at September 30, 2015:	$	(2.0	)

Fair Values of Non-Financial Assets and Liabilities

We concluded that none of our non-financial assets and liabilities subject to fair value assessments on a non-recurring basis required a material adjustment to the carrying amount of such assets and liabilities for the nine months endedSeptember 30, 2015 and September 30, 2014.

10. Net Income (Loss) Per Share

Basic and diluted net income (loss) per share were calculated as follows, for each period presented (in millions of dollars, except share and per share amounts):

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015			2014
Numerator:
Net income (loss)	$	22.1	$	15.9	$	(249.9	)	$	56.2
Denominator - Weighted-average common shares outstanding (in thousands):
Basic1	17,123		17,707		17,178			17,853
Add: dilutive effect of non-vested common shares, restricted stock units and performance shares	305		134		—			143
Add: dilutive effect of warrants	744		778		—			596
Diluted2	18,172		18,619		17,178			18,592
Net income (loss) per common share, Basic:	$	1.29	$	0.90	$	(14.55	)	$	3.15
Net income (loss) per common share, Diluted:	$	1.21	$	0.85	$	(14.55	)	$	3.02

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NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

______________________

¹  The basic weighted-average number of common shares outstanding during the periods presented excludes non-vested common shares, restricted stock units and performance shares.

²  The diluted weighted-average number of common shares outstanding during the periods presented was calculated using the treasury method.

Warrants relating to approximately 1.7 million notional common shares (with an exercise price of approximately $60.32 per share) and 3.7 million notional common shares (with an exercise price of approximately $60.80 per share) were outstanding as of September 30, 2015 and September 30, 2014, respectively. Upon settlement, each Warrant holder receives a number of shares of our common stock equal to (a) the number of notional shares associated with each Warrant settling on such date multiplied by (b)(i) the excess (if any) of the volume weighted average price of our common stock on each exercise date over the then effective strike price of the Warrants divided by (ii) such volume-weighted average price of our common stock. Warrant holders receive cash in lieu of fractional shares. The Warrants began settling ratably over the 120 trading day period beginning on July 1, 2015. During the quarter ended September 30, 2015, 516,220 shares of our common stock were issued upon settlement of Warrants relating to approximately 2.0 million notional common shares, leaving Warrants relating to approximately 1.7 million notional shares outstanding as of September 30, 2015 to be settled during the following quarter. If the Warrants relating to 1.7 million notional shares had all been settled on September 30, 2015, the number of shares issued using our average stock price for the quarter ended September 30, 2015 would have been 473,850. As of September 30, 2014, if the Warrants then outstanding relating to 3.7 million notional shares had all been settled, the number of our common shares issued using our average stock price for the quarter September 30, 2014 would have been 778,147. See Note 3 and Note 16 for additional information relating to the Warrants.

The following securities were excluded from the weighted-average diluted shares computation for the quarters and nine months endedSeptember 30, 2015 and September 30, 2014 as their inclusion would have been anti-dilutive (in thousands of shares):

	Quarter Ended		Nine Months Ended
	September 30,		September 30,
	2015	2014	2015	2014
Options to purchase common shares	—	20	17	20
Non-vested common shares, restricted stock units and performance shares	—	56	281	48
Warrants	—	—	773	—
Total excluded	—	76	1,071	68

During the nine months endedSeptember 30, 2015 and September 30, 2014, we paid a total of approximately $21.0 million ($1.20 per common share) and $19.1 million ($1.05 per common share), respectively, in cash dividends to stockholders, including the holders of restricted stock, and dividend equivalents to the holders of certain restricted stock units and to the holders of performance shares granted prior to 2014 with respect to the target number of underlying common shares (constituting approximately one-half of the maximum payout).

From time to time, we repurchase shares pursuant to a stock repurchase program authorized by our Board of Directors. Repurchase transactions will occur at such times and prices as management deems appropriate and will be funded with our excess liquidity after giving consideration to internal and external growth opportunities and future cash flows. Repurchases may be in open-market transactions or in privately negotiated transactions, and the program may be modified or terminated by our Board of Directors at any time.

During the nine months endedSeptember 30, 2015 and September 30, 2014, we repurchased 599,397 shares of common stock (at a weighted-average price of $75.81 per share) and 410,589 shares of common stock (at a weighted-average price of $70.34 per share), respectively, pursuant to the stock repurchase program. The total cost of $45.4 million and $28.9 million was recorded as Treasury stock during the nine months endedSeptember 30, 2015 and September 30, 2014, respectively. At September 30, 2015, $127.3 million were available for the repurchase of our common shares under the stock repurchase program.     

26

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

11. Segment and Geographical Area Information

Our primary line of business is the production of semi-fabricated specialty aluminum products for the following end market applications: aerospace and high strength products ("Aero/HS products"); extrusions for automotive applications ("Automotive Extrusions"); general engineering products ("GE products"); and other industrial products ("Other products"). We operate 11 focused production facilities in the United States and one in Canada. Consistent with the manner in which our chief operating decision maker reviews and evaluates our business, the Fabricated Products business is treated as a single operating segment.

In addition to the Fabricated Products segment, we have a business unit, All Other, which provides general and administrative support for our operations. For purposes of segment reporting under GAAP, we treat the Fabricated Products segment as a reportable segment. All Other is not considered a reportable segment.

The accounting policies of the Fabricated Products segment are the same as those described in Note 1. Segment results are evaluated internally by management before any allocation of corporate overhead and without any charge for income taxes, interest expense, or other net operating charges.

The following tables provide financial information by reporting segment and business unit for each period or as of each period-end, as applicable (in millions of dollars):

	Quarter Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Net sales:
Fabricated Products	$	336.4		$	338.9		$	1,075.3		$	1,018.1
Segment operating income (loss):
Fabricated Products1	$	47.3		$	35.6		$	142.8		$	121.2
All Other2	(6.8		)	(3.0		)	(523.9		)	(10.1		)
Total operating income (loss)	$	40.5		$	32.6		$	(381.1	)	$	111.1
Interest expense	(4.9		)	(9.7		)	(19.9		)	(27.7		)
Other (expense) income, net	(0.9		)	2.2			(0.1		)	5.9
Income (loss) before income taxes	$	34.7		$	25.1		$	(401.1	)	$	89.3
Depreciation and amortization:
Fabricated Products	$	7.9		$	7.8		$	23.8		$	22.7
All Other	0.2			0.2			0.4			0.4
Total depreciation and amortization	$	8.1		$	8.0		$	24.2		$	23.1
Capital expenditures:
Fabricated Products	$	15.1		$	9.3		$	37.8		$	38.8
All Other	0.4			0.2			0.6			0.8
Total capital expenditures	$	15.5		$	9.5		$	38.4		$	39.6

_____________________

¹  Fabricated Products segment operating income included non-cash mark-to-market losses on primary aluminum, natural gas, electricity and foreign currency hedging activities, which totaled $1.7 million and $3.5 million for the quarters ended September 30, 2015 and September 30, 2014, respectively. There was a $7.7 million non-cash mark-to-market loss on primary aluminum, natural gas, electricity and foreign currency hedging activities for the nine months endedSeptember 30, 2015 and none for the nine months endedSeptember 30, 2014. For further discussion regarding mark-to-market matters, see Note 8.

²  Operating loss in All Other included Net periodic postretirement benefit cost (income) of $0.6 million and $(6.0) million for the quarters ended September 30, 2015 and September 30, 2014, respectively, and $1.8 million and $(17.7) million for the nine months endedSeptember 30, 2015 and September 30, 2014, respectively. Additionally, operating loss in All Other included (gain) loss on removal of Union VEBA net assets of $(2.9) million and $490.9 million during the quarter and nine months endedSeptember 30, 2015, respectively. See Note 5 for further details.

27

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

	September 30, 2015		December 31, 2014
Assets:
Fabricated Products	$	897.3	$	878.9
All Other1	365.8		864.8
Total assets	$	1,263.1	$	1,743.7

_____________________

¹  Assets in All Other represent primarily all of our cash and cash equivalents, short-term investments, financial derivative assets, net assets of VEBAs (see Note 5 and Note 9) and net deferred income tax assets.

Net sales by product categories based on end market applications for the Fabricated Products segment were as follows (in millions of dollars):

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Net sales:
Aero/HS products	$	170.0	$	172.5	$	531.4	$	509.1
Automotive Extrusions	49.5		44.0		153.3		129.5
GE products	100.4		103.6		331.5		323.1
Other products	16.5		18.8		59.1		56.4
Total net sales	$	336.4	$	338.9	$	1,075.3	$	1,018.1

Geographic information for income taxes paid were as follows (in millions of dollars):

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Income taxes paid:
Fabricated Products —
United States	$	0.1	$	1.4	$	0.4	$	1.6
Canada	0.2		0.2		1.5		1.1
Total income taxes paid	$	0.3	$	1.6	$	1.9	$	2.7

The aggregate foreign currency transaction gains (losses) included in determining net income were immaterial for the quarters and nine months endedSeptember 30, 2015 and September 30, 2014.

For both quarters ended September 30, 2015 and September 30, 2014, one customer represented 25% of Fabricated Products Net sales. For the nine months endedSeptember 30, 2015 and September 30, 2014, one customer represented 25% and 26%, respectively, of Fabricated Products Net sales. No other individual customer accounted for more than 10% of Fabricated Products Net sales during the quarters and nine months endedSeptember 30, 2015 and September 30, 2014.

At September 30, 2015, one customer represented 17% and no other individual customers accounted for 10% or more of the trade receivables balance. Two individual customers accounted for 10% and 12% of the trade receivables balance at December 31, 2014. 

28

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

Information for contractual delivery of our primary aluminum supply from our major suppliers were as follows:

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Percentage of total annual primary aluminum supply (lbs):
Supply from the Company's top five major suppliers	84	%	82	%	86	%	79	%
Supply from the Company's largest supplier	28	%	31	%	28	%	30	%
Supply from the Company's second and third largest suppliers	45	%	34	%	36	%	32	%

12. Supplemental Cash Flow Information

	Nine Months Ended
	September 30,
	2015		2014
	(In millions of dollars)
Interest paid	$	13.5	$	12.2
Non-cash investing and financing activities:
Stock repurchases not yet settled (accrued in accounts payable)	$	0.3	$	0.2
Unpaid purchases of property and equipment	$	4.4	$	1.8

13. Other (Expense) Income, Net

Other income, net consisted of the following for each period presented (in millions of dollars):

	Quarter Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Interest income	$	0.1		$	0.3		$	0.3		$	0.8
Unrealized gains on financial derivatives1	—			2.2			—			3.6
Realized gains on investments	—			—			0.5			0.4
All other (expense) income, net	(1.0		)	(0.3		)	(0.9		)	1.1
Other (expense) income, net	$	(0.9	)	$	2.2		$	(0.1	)	$	5.9

______________________

¹  See "Hedges Relating to the Convertible Notes" in Note 8 for discussion of such instruments.

29

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

14. Other Comprehensive Income

The following table presents the tax effect allocated to each component of other comprehensive income (loss) for each period presented (in millions of dollars):

	Before-Tax			Income Tax			Net-of-Tax
	Amount			(Expense) Benefit4			Amount
Quarter Ended September 30, 2015
Salaried VEBA:
Reclassification adjustments:
Amortization of net actuarial loss1	$	0.3		$	(0.1	)	$	0.2
Amortization of prior service cost1	0.7			(0.2		)	0.5
Other comprehensive income relating to Salaried VEBA	1.0			(0.3		)	0.7
Available for sale securities:
Unrealized loss on available for sale securities	(0.4		)	0.1			(0.3		)
Reclassification adjustments:
Reclassification of unrealized gain upon sale of available for sale securities3	(0.1		)	0.1			—
Other comprehensive loss relating to available for sale securities	(0.5		)	0.2			(0.3		)
Foreign currency translation loss	(0.3		)	—			(0.3		)
Other comprehensive income	$	0.2		$	(0.1	)	$	0.1
Quarter Ended September 30, 2014
VEBAs:
Reclassification adjustments:
Amortization of net actuarial gain2	$	(0.5	)	$	0.2		$	(0.3	)
Amortization of prior service cost2	2.6			(1.0		)	1.6
Other comprehensive income relating to VEBAs	2.1			(0.8		)	1.3
Unrealized loss on available for sale securities	(0.2		)	0.1			(0.1		)
Foreign currency translation gain	0.1			—			0.1
Other comprehensive income	$	2.0		$	(0.7	)	$	1.3

30

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

	Before-Tax			Income Tax			Net-of-Tax
	Amount			(Expense) Benefit4			Amount
Nine Months Ended September 30, 2015
VEBAs:
Reclassification adjustments:
Amortization of net actuarial loss1	$	0.8		$	(0.3	)	$	0.5
Amortization of prior service cost1	2.2			(0.8		)	1.4
Removal of obligation relating to Union VEBA	106.6			(40.4		)	66.2
Other comprehensive income relating to VEBAs	109.6			(41.5		)	68.1
Available for sale securities:
Unrealized loss on available for sale securities	(0.7		)	0.2			(0.5		)
Reclassification adjustments:
Reclassification of unrealized loss upon sale of available for sale securities3	0.1			—			0.1
Other comprehensive loss relating to available for sale securities	(0.6		)	0.2			(0.4		)
Unrealized loss on foreign currency cash flow hedges	(0.2		)	0.1			(0.1		)
Foreign currency translation loss	(0.2		)	—			(0.2		)
Other comprehensive income	$	108.6		$	(41.2	)	$	67.4
Nine Months Ended September 30, 2014
VEBAs:
Reclassification adjustments:
Amortization of net actuarial (gain)2	$	(1.4	)	$	0.5		$	(0.9	)
Amortization of prior service cost2	8.0			(3.0		)	5.0
Other comprehensive income relating to VEBAs	6.6			(2.5		)	4.1
Available for sale securities:
Unrealized gain on available for sale securities	0.1			—			0.1
Reclassification adjustments:
Reclassification of unrealized gain upon sale of available for sale securities3	(0.2		)	0.1			(0.1		)
Other comprehensive loss relating to available for sale securities	(0.1		)	0.1			—
Foreign currency translation gain	0.2			—			0.2
Other comprehensive income	$	6.7		$	(2.4	)	$	4.3

________________

¹  Amounts reclassified out of Accumulated other comprehensive loss relating to VEBA adjustments were included as a component of Net periodic postretirement benefit cost (income) relating to the Salaried VEBA.

²  Amounts reclassified out of Accumulated other comprehensive loss relating to VEBA adjustments were included as a component of Net periodic postretirement benefit cost (income) relating to both VEBAs.

³  Amounts reclassified out of Accumulated other comprehensive loss relating to sales of available for sale securities were included as a component of Other (expense) income, net. We use the specific identification method to determine the amount reclassified out of Accumulated other comprehensive loss.

⁴  Income tax amounts reclassified out of Accumulated other comprehensive loss were included as a component of Income tax (provision) benefit.

31

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

15. Condensed Guarantor and Non-Guarantor Financial Information

We issued $225.0 million aggregate principal amount of our Senior Notes, of which $218.9 million aggregate principal amount remained outstanding as of September 30, 2015, pursuant to an indenture dated May 23, 2012 ("Indenture"), among Kaiser Aluminum Corporation ("Parent"), the subsidiary guarantors party thereto ("Guarantor Subsidiaries") and Wells Fargo Bank, National Association, as trustee ("Trustee"). The Guarantor Subsidiaries currently include Kaiser Aluminum Investments Company, Kaiser Aluminum Fabricated Products, LLC, Kaiser Aluminum Mill Products, Inc., Kaiser Aluminum Washington, LLC and Kaiser Aluminum Alexco, LLC, all of which are 100% owned by the Parent. The guarantees are full and unconditional and joint and several but have customary releases in the following situations: (i) the sale of the Guarantor Subsidiary or all of its assets; (ii) the declaration of a Guarantor Subsidiary as an unrestricted subsidiary under the Indenture; (iii) the termination or release of the Guarantor Subsidiary’s guarantee of certain other indebtedness; or (iv) our exercise of legal defeasance or covenant defeasance or the discharge of our obligations under the Indenture.

The following condensed consolidating financial information as of September 30, 2015 and December 31, 2014, and for the quarters and nine months endedSeptember 30, 2015 and September 30, 2014present (i) the financial position, results of operation and cash flows for each of (a) the Parent, (b) the Guarantor Subsidiaries on a combined basis and (c) the Non-Guarantor Subsidiaries (as defined below) on a combined basis; (ii) the adjustments necessary to eliminate investments in subsidiaries and intercompany balances and transactions among Parent, the Guarantor Subsidiaries and the Non-Guarantor Subsidiaries; and (iii) the resulting totals, reflecting our information on a consolidated basis, as reported. In the following tables, "Non-Guarantor Subsidiaries" refers to Kaiser Aluminum Canada Limited, Trochus Insurance Company, DCO Management, LLC, Kaiser Aluminum France, S.A.S. and Kaiser Aluminum Beijing Trading Company; and "Consolidating Adjustments" represent the adjustments necessary to eliminate the investments in our subsidiaries and other intercompany sales and cost of sales transactions. The condensed consolidating financial information should be read in conjunction with the consolidated financial statements herein.

32

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

CONDENSED CONSOLIDATING BALANCE SHEET

(In millions of dollars)

September 30, 2015

	Parent		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Consolidating Adjustments			Consolidated
ASSETS
Current assets:
Cash and cash equivalents	$	—	$	79.6	$	3.0	$	—		$	82.6
Short-term investments	—		30.0		—		—			30.0
Receivables:
Trade receivables — net	—		127.8		3.8		—			131.6
Intercompany receivables	29.2		96.8		2.6		(128.6		)	—
Other	—		2.1		2.3		—			4.4
Inventories	—		213.7		6.0		(2.4		)	217.3
Prepaid expenses and other current assets	0.1		98.1		1.3		(0.9		)	98.6
Total current assets	29.3		648.1		19.0		(131.9		)	564.5
Investments in and advances to subsidiaries	1,057.2		32.3		—		(1,089.5		)	—
Property, plant and equipment — net	—		444.2		28.5		—			472.7
Long-term intercompany receivables	—		—		2.4		(2.4		)	—
Deferred tax assets — net	—		128.6		—		7.1			135.7
Intangible assets — net	—		30.9		—		—			30.9
Goodwill	—		37.2		—		—			37.2
Other assets	3.7		18.3		0.1		—			22.1
Total	$	1,090.2	$	1,339.6	$	50.0	$	(1,216.7	)	$	1,263.1
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	0.7	$	64.1	$	4.5	$	—		$	69.3
Intercompany payable	92.3		42.6		3.8		(138.7		)	—
Accrued salaries, wages and related expenses	—		35.5		2.9		—			38.4
Other accrued liabilities	6.0		55.6		0.7		(0.9		)	61.4
Short-term capital lease	—		0.1		—		—			0.1
Total current liabilities	99.0		197.9		11.9		(139.6		)	169.2
Net liabilities of Salaried VEBA	—		15.9		—		—			15.9
Deferred tax liabilities	—		—		0.8		—			0.8
Long-term intercompany payable	—		2.4		—		(2.4		)	—
Long-term liabilities	—		80.9		5.1		—			86.0
Long-term debt	218.9		—		—		—			218.9
Total liabilities	317.9		297.1		17.8		(142.0		)	490.8
Total stockholders’ equity	772.3		1,042.5		32.2		(1,074.7		)	772.3
Total	$	1,090.2	$	1,339.6	$	50.0	$	(1,216.7	)	$	1,263.1

33

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

CONDENSED CONSOLIDATING BALANCE SHEET

(In millions of dollars)

December 31, 2014

	Parent		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Consolidating Adjustments			Consolidated
ASSETS
Current assets:
Cash and cash equivalents	$	—	$	175.3	$	2.4	$	—		$	177.7
Short-term investments	—		114.0		—		—			114.0
Receivables:
Trade receivables — net	—		126.1		3.2		—			129.3
Intercompany receivables	204.2		4.0		0.9		(209.1		)	—
Other	—		5.6		5.3		—			10.9
Inventories	—		208.0		7.6		(0.9		)	214.7
Prepaid expenses and other current assets	85.1		93.1		0.4		—			178.6
Total current assets	289.3		726.1		19.8		(210.0		)	825.2
Investments in and advances to subsidiaries	1,209.2		32.5		—		(1,241.7		)	—
Property, plant and equipment — net	—		437.4		17.5		—			454.9
Long-term intercompany receivables	—		—		15.9		(15.9		)	—
Net assets of Union VEBA	—		340.1		—		—			340.1
Deferred tax assets — net	—		23.8		—		7.1			30.9
Intangible assets — net	—		32.1		—		—			32.1
Goodwill	—		37.2		—		—			37.2
Other assets	4.4		18.8		0.1		—			23.3
Total	$	1,502.9	$	1,648.0	$	53.3	$	(1,460.5	)	$	1,743.7
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	1.3	$	73.8	$	6.3	$	—		$	81.4
Intercompany payable	—		221.3		3.3		(224.6		)	—
Accrued salaries, wages and related expenses	—		36.5		3.1		—			39.6
Other accrued liabilities	88.2		43.8		0.8		—			132.8
Current portion of long-term debt	172.5		—		—		—			172.5
Short-term capital lease	—		0.1		—		—			0.1
Total current liabilities	262.0		375.5		13.5		(224.6		)	426.4
Net liabilities of Salaried VEBA	—		17.2		—		—			17.2
Deferred tax liabilities	—		—		0.9		—			0.9
Long-term intercompany payable	—		15.9		—		(15.9		)	—
Long-term liabilities	—		50.3		8.0		—			58.3
Long-term debt	225.0		—		—		—			225.0
Total liabilities	487.0		458.9		22.4		(240.5		)	727.8
Total stockholders’ equity	1,015.9		1,189.1		30.9		(1,220.0		)	1,015.9
Total	$	1,502.9	$	1,648.0	$	53.3	$	(1,460.5	)	$	1,743.7

34

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME (LOSS)

(In millions of dollars)

Quarter Ended September 30, 2015

	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
Net sales	$	—		$	329.5		$	29.4		$	(22.5	)	$	336.4
Costs and expenses:
Cost of products sold:
Cost of products sold, excluding depreciation and amortization and other items	—			263.1			25.3			(21.1		)	267.3
Unrealized losses on derivative instruments	—			1.7			—			—			1.7
Depreciation and amortization	—			7.8			0.3			—			8.1
Selling, general, administrative, research and development:
Selling, general, administrative, research and development	0.9			18.4			2.4			(0.6		)	21.1
Net periodic postretirement benefit cost relating to Salaried VEBA	—			0.6			—			—			0.6
Gain on removal of Union VEBA net assets	—			(2.9		)	—			—			(2.9		)
Total selling, general, administrative, research and development	0.9			16.1			2.4			(0.6		)	18.8
Total costs and expenses	0.9			288.7			28.0			(21.7		)	295.9
Operating (loss) income	(0.9		)	40.8			1.4			(0.8		)	40.5
Other (expense) income:
Interest expense	(4.7		)	(0.3		)	—			0.1			(4.9		)
Other (expense) income, net	(0.6		)	2.2			(2.4		)	(0.1		)	(0.9		)
(Loss) income before income taxes	(6.2		)	42.7			(1.0		)	(0.8		)	34.7
Income tax (provision) benefit	—			(15.6		)	0.8			2.2			(12.6		)
Earnings (loss) in equity of subsidiaries	28.3			(1.0		)	—			(27.3		)	—
Net income (loss)	$	22.1		$	26.1		$	(0.2	)	$	(25.9	)	$	22.1
Comprehensive income (loss)	$	22.2		$	26.5		$	(0.5	)	$	(26.0	)	$	22.2

35

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE (LOSS) INCOME

(In millions of dollars)

Nine Months Ended September 30, 2015

	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
Net sales	$	—		$	1,051.2		$	97.6		$	(73.5	)	$	1,075.3
Costs and expenses:
Cost of products sold:
Cost of products sold, excluding depreciation and amortization and other items	—			848.9			85.8			(70.3		)	864.4
Unrealized loss on derivative instruments	—			7.7			—			—			7.7
Depreciation and amortization	—			23.3			0.9			—			24.2
Selling, general, administrative, research and development:
Selling, general, administrative, research and development	3.3			58.6			7.2			(1.7		)	67.4
Net periodic postretirement benefit cost relating to Salaried VEBA	—			1.8			—			—			1.8
Loss on removal of Union VEBA net assets	—			490.9			—			—			490.9
Total selling, general, administrative, research and development	3.3			551.3			7.2			(1.7		)	560.1
Total costs and expenses	3.3			1,431.2			93.9			(72.0		)	1,456.4
Operating (loss) income	(3.3		)	(380.0		)	3.7			(1.5		)	(381.1		)
Other (expense) income:
Interest expense	(19.1		)	(1.1		)	—			0.3			(19.9		)
Other (expense) income, net	(0.6		)	3.0			(2.2		)	(0.3		)	(0.1		)
(Loss) income before income taxes	(23.0		)	(378.1		)	1.5			(1.5		)	(401.1		)
Income tax benefit	—			140.5			2.2			8.5			151.2
(Loss) earnings in equity of subsidiaries	(226.9		)	2.2			—			224.7			—
Net (loss) income	$	(249.9	)	$	(235.4	)	$	3.7		$	231.7		$	(249.9	)
Comprehensive (loss) income	$	(182.5	)	$	(167.8	)	$	3.5		$	164.3		$	(182.5	)

36

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME

(In millions of dollars)

Quarter Ended September 30, 2014

	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
Net sales	$	—		$	330.3		$	33.6		$	(25.0	)	$	338.9
Costs and expenses:
Cost of products sold:
Cost of products sold, excluding depreciation and amortization and other items	—			274.7			29.8			(24.1		)	280.4
Unrealized gains on derivative instruments	—			3.6			—			—			3.6
Depreciation and amortization	—			7.7			0.3			—			8.0
Selling, general, administrative, research and development:
Selling, general, administrative, research and development	0.9			17.2			1.7			(0.8		)	19.0
Net periodic postretirement benefit income relating to VEBAs	—			(6.0		)	—			—			(6.0		)
Total selling, general, administrative, research and development	0.9			11.2			1.7			(0.8		)	13.0
Other operating charges, net	—			1.3			—			—			1.3
Total costs and expenses	0.9			298.5			31.8			(24.9		)	306.3
Operating (loss) income	(0.9		)	31.8			1.8			(0.1		)	32.6
Other (expense) income:
Interest expense	(9.4		)	(0.5		)	—			0.2			(9.7		)
Other income (expense), net	2.2			0.3			(0.1		)	(0.2		)	2.2
(Loss) income before income taxes	(8.1		)	31.6			1.7			(0.1		)	25.1
Income tax (provision) benefit	—			(11.9		)	(0.1		)	2.8			(9.2		)
Earnings in equity of subsidiaries	24.0			1.6			—			(25.6		)	—
Net income	$	15.9		$	21.3		$	1.6		$	(22.9	)	$	15.9
Comprehensive income	$	17.2		$	22.5		$	1.7		$	(24.2	)	$	17.2

37

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME

(In millions of dollars)

Nine Months Ended September 30, 2014

	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
Net sales	$	—		$	993.1		$	100.7		$	(75.7	)	$	1,018.1
Costs and expenses:
Cost of products sold:
Cost of products sold, excluding depreciation and amortization and other items	—			824.4			87.9			(73.5		)	838.8
Unrealized gains on derivative instruments	—			—			—			—			—
Depreciation and amortization	—			22.3			0.8			—			23.1
Selling, general, administrative, research and development:
Selling, general, administrative, research and development	3.1			52.3			7.9			(2.0		)	61.3
Net periodic postretirement benefit income relating to VEBAs	—			(17.7		)	—			—			(17.7		)
Total selling, general, administrative, research and development	3.1			34.6			7.9			(2.0		)	43.6
Other operating charges, net	—			1.5			—			—			1.5
Total costs and expenses	3.1			882.8			96.6			(75.5		)	907.0
Operating (loss) income	(3.1		)	110.3			4.1			(0.2		)	111.1
Other (expense) income:
Interest expense	(28.0		)	(0.1		)	—			0.4			(27.7		)
Other income, net	3.6			2.3			0.4			(0.4		)	5.9
(Loss) income before income taxes	(27.5		)	112.5			4.5			(0.2		)	89.3
Income tax (provision) benefit	—			(42.3		)	(0.9		)	10.1			(33.1		)
Earnings in equity of subsidiaries	83.7			3.4			—			(87.1		)	—
Net income	$	56.2		$	73.6		$	3.6		$	(77.2	)	$	56.2
Comprehensive income	$	60.5		$	77.7		$	3.8		$	(81.5	)	$	60.5

38

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

(In millions of dollars)

Nine Months Ended September 30, 2015

	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating Adjustments		Consolidated
Cash flows from operating activities:
Net cash provided by (used in) operating activities	$	250.2		$	(140.8	)	$	(0.5	)	$	—	$	108.9
Cash flows from investing activities:
Capital expenditures	—			(26.0		)	(12.4		)	—		(38.4		)
Purchase of available for sale securities	—			(0.5		)	—			—		(0.5		)
Proceeds from disposition of available for sale securities	—			84.0			—			—		84.0
Net cash provided by (used in) investing activities	—			57.5			(12.4		)	—		45.1
Cash flows from financing activities:
Repurchase of Senior Notes	(6.1		)	—			—			—		(6.1		)
Settlement of Convertible Notes	(175.0		)	—			—			—		(175.0		)
Proceeds from cash-settled call options related to settlement of Convertible Notes	94.9			—			—			—		94.9
Payment for conversion premium related to settlement of Convertible Notes	(94.9		)	—			—			—		(94.9		)
Excess tax benefit upon vesting of non-vested shares and dividend payment on unvested shares expected to vest	—			1.1			—			—		1.1
Cancellation of shares to cover employees’ tax withholdings upon vesting of non-vested shares	(3.0		)	—			—			—		(3.0		)
Repurchase of common stock	(45.1		)	—			—			—		(45.1		)
Cash dividend paid to stockholders	(21.0		)	—			—			—		(21.0		)
Intercompany loan	—			(13.5		)	13.5			—		—
Net cash (used in) provided by financing activities	(250.2		)	(12.4		)	13.5			—		(249.1		)
Net (decrease) increase in cash and cash equivalents during the period	—			(95.7		)	0.6			—		(95.1		)
Cash and cash equivalents at beginning of period	—			175.3			2.4			—		177.7
Cash and cash equivalents at end of period	$	—		$	79.6		$	3.0		$	—	$	82.6

39

KAISER ALUMINUM CORPORATION AND SUBSIDIARY COMPANIES

NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS - UNAUDITED

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

(In millions of dollars)

Nine Months Ended September 30, 2014

	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating Adjustments		Consolidated
Cash flows from operating activities:
Net cash provided by operating activities	$	13.9		$	82.7		$	7.1		$	—	$	103.7
Cash flows from investing activities:
Capital expenditures	—			(38.1		)	(1.5		)	—		(39.6		)
Purchase of available for sale securities	—			(53.4		)	—			—		(53.4		)
Proceeds from disposition of available for sale securities	—			82.2			—			—		82.2
Change in restricted cash	—			(0.7		)	—			—		(0.7		)
Net cash used in investing activities	—			(10.0		)	(1.5		)	—		(11.5		)
Cash flows from financing activities:
Excess tax benefit upon vesting of non-vested shares and dividend payment on unvested shares expected to vest	—			0.8			—			—		0.8
Cancellation of shares to cover employees’ tax withholdings upon vesting of non-vested shares	(2.4		)	—			—			—		(2.4		)
Repurchase of common stock	(28.7		)	—			—			—		(28.7		)
Cash dividend paid to stockholders	(19.1		)	—			—			—		(19.1		)
Intercompany loan	31.3			(22.6		)	(8.7		)	—		—
Net cash used in financing activities	(18.9		)	(21.8		)	(8.7		)	—		(49.4		)
Net increase (decrease) in cash and cash equivalents during the period	(5.0		)	50.9			(3.1		)	—		42.8
Cash and cash equivalents at beginning of period	5.0			157.7			6.8			—		169.5
Cash and cash equivalents at end of period	$	—		$	208.6		$	3.7		$	—	$	212.3

16. Subsequent Events

Dividend Declaration. On October 13, 2015, we announced that our Board of Directors declared a cash dividend of $0.40 per common share or approximately $7.1 million (including dividend equivalents), which will be paid on or about November 13, 2015 to stockholders of record at the close of business on October 23, 2015.

Common Stock Issued Upon Exercises of Warrants. Beginning on October 1, 2015 and through October 19, 2015, 102,555 shares of our common stock were issued and 8,200 shares of our common stock were pending settlement in connection with exercises of the Warrants at an exercise price of $60.32. For additional information related to the Warrants, see Note 3 and Note 10.

Anti-dilution Adjustments to Warrants. Effective October 21, 2015, the ex-dividend date for the quarter’s dividend payable November 13, 2015, the Warrants’ exercise price will be $60.20 per share.

Repurchase of Senior Notes. Beginning on October 1, 2015 and through October 19, 2015, we repurchased $21.1 million aggregate principal amount of Senior Notes for approximately 107.5% of face value plus accrued interest. See Note 3 for additional information about the repurchase of our Senior Notes.

40

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

This Item should be read in conjunction with Part I, Item 1. "Financial Statements" of this Quarterly Report on Form 10-Q (this "Report").

This Report contains statements which constitute "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. These statements appear throughout this Report and can be identified by the use of forward-looking terminology such as "believes,""expects,""may,""estimates,""will,""should,""plans" or "anticipates" or the negative of the foregoing or other variations of comparable terminology, or by discussions of strategy. Readers are cautioned that any such forward-looking statements are not guarantees of future performance and involve significant risks and uncertainties and that actual results may vary from those in the forward-looking statements as a result of various factors. These factors include: the effectiveness of management’s strategies and decisions; general economic and business conditions including cyclicality and other conditions in the aerospace, automotive and other end market applications we serve; developments in technology; new or modified statutory or regulatory requirements; and changing prices and market conditions. This Item and Part I, Item 1A. "Risk Factors" included in our Annual Report on Form 10-K for the year ended December 31, 2014 each identify other factors that could cause actual results to vary. No assurance can be given that these are all of the factors that could cause actual results to vary materially from the forward-looking statements.

Management’s discussion and analysis of financial condition and results of operations ("MD&A") is designed to provide a reader of our financial statements with a narrative from the perspective of our management on our financial condition, results of operations, liquidity and certain other factors that may affect our future results. Our MD&A is presented in the following sections:

• Overview;

• Highlights of the Quarter Ended September 30, 2015;

• Results of Operations;

• Liquidity and Capital Resources;

• Contractual Obligations, Commercial Commitments and Off-Balance-Sheet and Other Arrangements;

• Critical Accounting Estimates and Policies;

• New Accounting Pronouncements; and

• Available Information.

Our MD&A should be read in conjunction with the consolidated financial statements and related notes thereto included under Part I, Item 1. "Financial Statements" included in this Report and the consolidated financial statements and related notes included in Part II, Item 8. "Financial Statements and Supplementary Data" of our Annual Report on Form 10-K for the year ended December 31, 2014.

In the discussion of operating results below, certain items are referred to as non-run-rate items. For purposes of such discussion, non-run-rate items are items that, while they may recur from period-to-period, (i) are particularly material to results; (ii) affect costs primarily as a result of external market factors; and (iii) may not recur in future periods if the same level of underlying performance were to occur. Non-run-rate items are part of our business and operating environment but are worthy of being highlighted for the benefit of readers of our financial statements. Our intent is to allow users of the financial statements to consider our results both in light of and separately from items such as net changes in related assets and obligations of the voluntary employees’ beneficiary associations ("VEBAs"), unrealized-mark-to-market gains or losses on derivatives related to fluctuations in underlying metal prices, energy prices, our stock price and currency exchange rates. For a reconciliation of operating income excluding non-run-rate items to operating income, see "Results of Operations - Segment and Business Unit Information" below.

We also provide information regarding value added revenue. Value added revenue represents net sales less the hedged cost of alloyed metal. A fundamental part of our business model is to mitigate the impact of aluminum price volatility through pricing policies that allow us to pass metal cost fluctuations through to our customers and a hedging program that addresses metal price exposure in circumstances in which we are unable to pass metal cost fluctuations through to our customers due to firm-price customer sales agreements that specify the underlying metal price plus a conversion price. As a result of our pricing policies and hedging program, fluctuations in underlying metal price do not directly impact our profitability. Accordingly, value added revenue (including average realized value added revenue, third party value added revenue and value added revenue of the product categories of our Fabricated Products segment) is worthy of being highlighted for the benefit of users of our financial statements. Our intent is to allow users of the financial statements to consider our net sales information both with and without the metal cost component thereof. For a reconciliation of value added revenue to Net sales, see "Results of Operations - Segment and Business Unit Information" below.

41

Overview

We are a leading North American manufacturer of semi-fabricated specialty aluminum products for the following end market applications: aerospace and high strength products ("Aero/HS products"); extrusions for automotive applications ("Automotive Extrusions"); general engineering products ("GE products"); and other industrial products ("Other products").

At September 30, 2015, we operated 11 focused production facilities in the United States and one facility in Canada that produce rolled, extruded and drawn aluminum products used principally for aerospace and defense, automotive, consumer durables, electronics, electrical and machinery and equipment end market applications. Through these facilities, we recorded Net sales of approximately $1.1 billion on shipments of approximately 468.2 million pounds of semi-fabricated aluminum products during the nine months endedSeptember 30, 2015.

We have long-standing relationships with our customers, which consist primarily of blue-chip companies including leading aerospace companies, automotive suppliers and metal service centers. In our served markets, we seek to be the supplier of choice by pursuing "Best in Class" customer satisfaction and offering a broad product portfolio. We have a culture of continuous improvement that is facilitated by the Kaiser Production System ("KPS"), an integrated application of tools such as Lean Manufacturing, Six Sigma and Total Productive Manufacturing. We believe KPS enables us to continuously reduce our own manufacturing costs, eliminate waste throughout the value chain and deliver "Best in Class" customer service through consistent, on-time delivery of quality products on short lead times. We strive to tightly integrate the management of the operations within our Fabricated Products segment across multiple production facilities, product lines and target markets in order to maximize the efficiency of product flow to our customers.

A fundamental part of our business model is to mitigate the impact of aluminum price volatility on our cash flow. We purchase primary and scrap aluminum from third party suppliers to manufacture our products, and the price for the aluminum we purchase is typically based on the Average Midwest Transaction Price ("Midwest Price"). The Midwest Price represents the London Metal Exchange price ("LME") plus a Midwest premium which fluctuates in response to the aluminum supply/demand dynamics in North America. We manage the risk of fluctuations in the price of aluminum through either (i) pricing policies that allow us to pass the underlying cost of metal onto customers or (ii) hedging by purchasing financial derivatives to shield us from exposure related to firm-price sales contracts that specify the underlying metal price plus a conversion price. While we can generally pass metal price movement through to customers, for some of our higher value added products sold on a spot basis, the pass through of metal price movements can sometimes lag by as much as several months, with a favorable impact to us when metal prices decline and an adverse impact to us when metal prices increase. The average LME plus Midwest premium transaction price per pound of primary aluminum for the quarters ended September 30, 2015 and September 30, 2014 was $0.72 + $0.08 and $0.90 + $0.21, respectively. The average LME plus Midwest premium transaction price per pound of primary aluminum for the nine months endedSeptember 30, 2015 and September 30, 2014 was $0.78 + $0.14 and $0.83 + $0.20, respectively. At October 19, 2015, the LME plus Midwest premium transaction price per pound was $0.70 + $0.07.

Our highly engineered products are manufactured to meet demanding requirements of Aero/HS products, Automotive Extrusions, GE products and Other products. We have focused our business on select end market applications where we believe we have sustainable competitive advantages and opportunities for long-term profitable growth. We believe that we differentiate ourselves with "Best in Class" customer satisfaction and a broad product offering, including our KaiserSelect^® product line. Our KaiserSelect^® products are manufactured to deliver enhanced product characteristics with improved consistency, which results in such benefits as better performance, lower waste and, in many cases, lower cost for our customers.

In the commercial aerospace sector, we believe that global economic growth and development will continue to drive growth in airline passenger miles. In addition, trends such as longer routes, larger payloads and focus on fuel efficiency have increased the demand for new and larger aircraft. We believe the strength of commercial aerospace demand is demonstrated by the existing nine-year backlog for the two primary manufacturers of commercial aircraft. Further, we believe that the long-term demand drivers, including growing build rates, larger airframes and continued conversion of parts to monolithic design (where aluminum plate is heavily machined to form the desired part from a single piece of metal as opposed to using aluminum sheet, extrusions or forgings that are affixed to one another using rivets, bolts or welds) throughout the industry will continue to increase demand for our high strength aerospace plate. We expect aerospace plate demand to grow at a pace higher than our other Aero/HS products (including sheet, extruded shapes, cold finish rod and bar and tube) as some of the applications using these other Aero/HS products continue to be converted to monolithic design (using plate in lieu of these other products). Additionally, our Aero/HS products other than plate tend to be used to a greater degree in applications that have a lower growth rate than commercial aerospace.

Our Aero/HS and GE products are also sold for use in defense end market applications. Requirements of military engagements and sequestration of spending by the United States government will determine near-term demand for our Aero/HS

42

and GE products for use in such applications. In the long-term, we expect the production of the F-35, or Joint Strike Fighter, and other military fixed and rotary winged aircraft to be important demand drivers for our Aero/HS products.

Commercial aerospace and defense end market applications have demanding customer requirements for quality and consistency. As a result, there are a limited number of suppliers worldwide who are qualified to serve these market segments. We believe barriers to entry include significant capital requirements, technological expertise and a rigorous qualification process for safety-critical applications.

We expect the 2015 North American automotive sector build rates to increase approximately 2.6% over 2014 based on data from IHS, a provider of technical information. Our Automotive Extrusions typically have specific performance attributes in terms of machinability and/or mechanical properties for specific applications across a broad mix of North American original equipment manufacturers ("OEMs") and automotive platforms. We believe that these attributes are not easily replicated by our competitors and are important to our customers, who are typically first tier automotive suppliers. Additionally, we believe that in North America, from 2001 to 2014, the aluminum extrusion content per vehicle grew at a compound annual growth rate of 3.2% based on data provided by the Aluminum Association and IHS, as automotive OEMs and their suppliers found opportunities to decrease weight without sacrificing structural integrity and safety performance. We also believe the United States’ Corporate Average Fuel Economy ("CAFE") regulations, which increase fuel efficiency standards on an annual basis, will continue to drive growth in demand for aluminum extruded components in passenger vehicles as a replacement for the heavier weight of steel components.

Our GE products serve the North American industrial market segments, and demand for these products generally tracks the broader manufacturing economic environment.

Highlights of the quarter ended September 30, 2015 include:

• Fabricated Products segment shipments of 150.5 million pounds, a 4%increase from the third quarter of 2014;

• Strong underlying demand for aerospace and automotive applications;

• Improved sales margins – selective increases in spot prices and lower contained metal costs;

• Planned 10-day outage at our Spokane, Washington ("Trentwood") facility temporarily impacted throughput and efficiency;

• Higher shipments for new automotive extrusion programs drove higher ramp-up costs;

• Combined cash and cash equivalents, short-term investments and net borrowing availability under our Revolving Credit Facility of approximately $351.7 million, with no borrowings under the revolving credit facility, as of September 30, 2015;

• Declaration and payment of a regular dividend of $0.40 per common share, or $7.0 million;

• Issuance of 516,220 shares of our common stock in connection with warrant exercises;

• Repurchase of 46,943 shares of our common stock at the weighted average price per share of $82.87; and

• Repurchase of $6.1 million aggregate principal amount of our Senior Notes for 107.5% of the face value.

Results of Operations

Consolidated Results of Operations

Net Sales. Net sales totaled $336.4 million and $338.9 million for the quarters ended September 30, 2015 and September 30, 2014, respectively, reflecting a 5% decrease in average realized sales price per pound, partially offset by a 4% increase in Fabricated Products segment shipment volume. The decrease in average realized sales price per pound reflected a 16% decrease in average hedged cost of alloyed metal prices per pound, partially offset by a 6% increase in average value added revenue per pound. The increase in Fabricated Products segment shipment volume was due primarily to a 4.7 million pound, or 24%, increase in Automotive Extrusions shipment. The increase in Automotive Extrusions shipment reflected the strong automotive demand that was fueled by higher build rates of large vehicles. The slight increase in average value added revenue per pound reflected spot pricing improvements on some Aero/HS and GE products, the benefit from lower contained metal prices on some high value added products and a more favorable shipment mix of Aero/HS and GE products sold.

Net sales totaled $1,075.3 million and $1,018.1 million for the nine months endedSeptember 30, 2015 and September 30, 2014, respectively, primarily reflecting a 5% increase in Fabricated Products segment shipment volume. The increase in Fabricated Products segment shipment volume was due primarily to (i) a 7.5 million pound, or 4%, increase in Aero/HS

43

products shipment volume and (ii) a 11.5 million pound, or 19%, increase in Automotive Extrusions shipment volume due primarily to the strong automotive demand discussed above.

Fluctuation in underlying primary aluminum market prices does not necessarily directly impact profitability because (i) a substantial portion of the business conducted by the Fabricated Products segment passes aluminum price changes directly onto customers and (ii) our hedging activities in support of the Fabricated Products segment’s firm price sales agreements limit our losses, as well as gains, from primary metal price changes. See the table in "Segment and Business Unit Information" below for further details.

Cost of Products Sold Excluding Depreciation and Amortization and Other Items. Cost of products sold, excluding depreciation and amortization and other items for the quarter endedSeptember 30, 2015 totaled $267.3 million, or 79% of Net sales, compared to $280.4 million, or 83% of Net sales, for the quarter endedSeptember 30, 2014. The decrease of $13.1 million was comprised of a $22.0 million decrease in hedged cost of alloyed metal, partially offset by $8.8 million of higher net manufacturing conversion and other costs. Of the $22.0 million decrease in hedged cost of alloyed metal, $28.9 million was due to lower hedged metal prices, partially offset by $6.8 million of higher shipment volume, as discussed in "Net Sales" above. Net manufacturing conversion and other costs increased $3.9 million due to the impact of higher shipment volume. Additionally, net manufacturing conversion and other costs reflected $11.8 million estimated incremental costs primarily from (i) the lower throughput and related inefficiencies from the planned 10-day equipment outage for maintenance at our Trentwood facility and (ii) costs to respond to unexpectedly strong and volatile order patterns from some of our automotive customers as the automotive supply chain adapts to increased demand for aluminum components for larger vehicles, offset by $7.5 million lower non-run-rate costs detailed in "Segment and Business Unit Information" below. See "Segment and Business Unit Information" below for a further discussion of the comparative results of operations for the quarters ended September 30, 2015 and September 30, 2014.

Cost of products sold, excluding depreciation and amortization and other items for the nine months endedSeptember 30, 2015 totaled $864.4 million, or 80% of Net sales, compared to $838.8 million, or 82% of Net sales, for the nine months endedSeptember 30, 2014. The increase of $25.6 million was comprised of an increase of $12.3 million related to higher hedged cost of alloyed metal and an increase of $13.1 million related to conversion costs. Of the $12.3 million increase in hedged cost of alloyed metal, $21.1 million was due to higher shipment volume, as discussed in "Net Sales" above, partially offset by $8.8 million due to lower hedged metal prices. The $13.1 million increase in conversion costs reflected $17.3 million of higher conversion costs due to the impact of higher shipment volume, partially offset by $2.5 million of lower planned major maintenance expense and $2.4 million of lower energy costs. See "Segment and Business Unit Information" below for a further discussion of the comparative results of operations for the nine months endedSeptember 30, 2015 and September 30, 2014.

Selling, General, Administrative, Research and Development ("SG&A and R&D"). SG&A and R&D expense was $21.1 million and $19.0 million for the quarters ended September 30, 2015 and September 30, 2014, respectively. The increase was due primarily to a combined increase in salaries, benefits, employee incentive compensation and research and development of approximately $2.2 million and an increase in advertising expense of $0.3 million, partially offset by a decrease in workers’ compensation costs of $0.4 million.

SG&A and R&D expense was $67.4 million and $61.3 million for the nine months endedSeptember 30, 2015 and September 30, 2014, respectively. The increase was due primarily to (i) a combined increase in salaries, benefits and employee incentive compensation of approximately $5.0 million; (ii) an increase in advertising expense of $0.8 million; and (iii) an increase in research and development expense of $0.7 million, partially offset by a $0.5 million decrease in workers’ compensation expense.

Net Periodic Postretirement Benefit Cost (Income) Relating to VEBAs. Net periodic postretirement benefit cost (income) relating to the VEBAs totaled $0.6 million and $(6.0) million for the quarters ended September 30, 2015 and September 30, 2014, respectively, and $1.8 million and $(17.7) million for the nine months endedSeptember 30, 2015 and September 30, 2014, respectively. The increase in cost for both the quarter and nine months endedSeptember 30, 2015 was due primarily to the removal of the Union VEBA’s net assets and related liabilities from our consolidated financial statements during the quarter ended March 31, 2015. See Note 5 of Notes to Interim Consolidated Financial Statements included in this Report for disclosure regarding the VEBAs.

Gain (Loss) on Removal of Union VEBA Net Assets. Loss on removal of Union VEBA net assets totaled $490.9 million for the nine months endedSeptember 30, 2015 due to the removal of the Union VEBA’s plan assets during the quarter ended March 31, 2015, related deferred tax liabilities and accumulated other comprehensive loss from our consolidated financial statements as a result of the definitive expiration of our obligation to make annual variable contributions to the Union VEBA for any period after September 2017. The gain on removal of Union VEBA net assets of $2.9 million for the quarter ended

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September 30, 2015 was due to our adjustment of the estimated, remaining variable cash contributions based on our most current cash flow projections. See Note 5 of Notes to Interim Consolidated Financial Statements included in this Report for further details.

Interest Expense. Interest expense represents cash and non-cash interest expense incurred on our Convertible Notes, which were settled on April 1, 2015, our 8.25% senior notes due 2020 ("Senior Notes") and our revolving credit facility, net of capitalized interest. Interest expense was $4.9 million and $9.7 million for the quarters ended September 30, 2015 and September 30, 2014, respectively, net of $0.4 million and $0.3 million of interest expense capitalized as part of construction in progress, respectively. The decrease in interest expense was due primarily to the settlement of our Convertible Notes on April 1, 2015. Non-cash amortization of the discount on our Convertible Notes accounted for $2.3 million of the total interest expense for the quarter ended September 30, 2014.

Interest expense was $19.9 million and $27.7 million for the nine months endedSeptember 30, 2015 and September 30, 2014, respectively, net of $1.1 million and $2.2 million of interest expense capitalized as part of construction in progress, respectively. The decrease in interest expense was due primarily to the settlement of our Convertible Notes on April 1, 2015. Non-cash amortization of the discount on our Convertible Notes accounted for $2.4 million and $6.7 million of the total interest expense for the nine months endedSeptember 30, 2015 and September 30, 2014, respectively.

Income Tax Provision. See Note 4 of Notes to Interim Consolidated Financial Statements included in this Report for disclosure regarding our income tax provision.

Derivatives

See Note 8 of Notes to Interim Consolidated Financial Statements included in this Report for disclosure regarding our derivatives.

Fair Value Measurements

See Note 9 of Notes to Interim Consolidated Financial Statements included in this Report for disclosure regarding our fair value measurements.

Deferred Tax Assets

Our non-current net deferred tax assets were $135.7 million and $30.9 million at September 30, 2015 and December 31, 2014, respectively. The increase in the non-current net deferred tax assets was primarily related to the removal of the Union VEBA’s deferred tax liability of $127.0 million and an increase to the non-current deferred tax asset of $11.1 million for the estimated non-current portion of the aggregate variable contributions related to the Union VEBA, which was partially offset by $33.6 million for the utilization of our net operating losses. At December 31, 2014, $127.0 million related to a deferred tax liability for our Union VEBA was included in our non-current net deferred tax assets.

Segment and Business Unit Information

Consistent with the manner in which our chief operating decision maker reviews and evaluates our business, we have one operating segment, which we refer to as Fabricated Products, that produces semi-fabricated specialty aluminum products, such as aluminum sheet and plate and extruded and drawn products, primarily used in aerospace/high strength, automotive, general engineering and other industrial end market applications. We categorize our products by these end market applications as follows: Aero/HS products, Automotive Extrusions, GE products and Other products. We also have a business unit, All Other, which provides general and administrative support for our operations. For purposes of segment reporting under United States generally accepted accounting principles ("GAAP"), we treat the Fabricated Products segment as a reportable segment. All Other is not considered a reportable segment.

The following data should be read in conjunction with our consolidated financial statements and the notes thereto included in Part I, Item 1. "Financial Statements" of this Report. See Note 11 of Notes to Interim Consolidated Financial Statements included in this Report for further information regarding segments. Interim results are not necessarily indicative of those for a full year.

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Fabricated Products

The table below provides selected financial information for our Fabricated Products segment for each period presented (in millions of dollars):

	Quarter Ended September 30,						Nine Months Ended September 30,
	2015			2014			2015			2014
Segment operating income	$	47.3		$	35.6		$	142.8		$	121.2
Impact to segment operating income of non-run-rate items:
Adjustments to plant-level LIFO1	2.6			(1.4		)	1.1			(5.5		)
Mark-to-market losses on derivative instruments	(1.7		)	(3.5		)	(7.7		)	—
Workers’ compensation (cost) benefit due to discounting	(0.1		)	(0.1		)	(0.2		)	0.2
Asset impairment charges	—			(1.3		)	—			(1.5		)
Environmental expenses2	—			(0.5		)	(1.2		)	(0.8		)
Total non-run-rate items	0.8			(6.8		)	(8.0		)	(7.6		)
Segment operating income excluding non-run-rate items	$	46.5		$	42.4		$	150.8		$	128.8

_____________________

¹  We manage our Fabricated Products segment business on a monthly last-in, first-out ("LIFO") basis at each plant, but report inventory externally on an annual LIFO basis in accordance with GAAP on a consolidated basis. This amount represents the conversion from GAAP LIFO applied on a consolidated basis for the Fabricated Products segment to monthly LIFO applied on a plant-by-plant basis.

²  See Note 7 of Notes to Interim Consolidated Financial Statements included in this Report for additional information relating to the environmental expenses.

As noted above, operating income excluding non-run-rate items for the quarter endedSeptember 30, 2015 was $4.1 millionhigher than operating income excluding such items for the quarter endedSeptember 30, 2014. Higher operating income excluding non-run-rate items primarily reflected (i) a positive sales impact of $16.0 million due primarily to favorable spot pricing and sales mix for Aero/HS and GE products and increased shipments of Automotive Extrusions, offset by (ii) approximately $11.9 million of higher net manufacturing conversion and other costs, primarily related to the lower throughput and inefficiencies related to the planned 10-day equipment outage at our Trentwood facility as well as inefficiencies in our automotive operations to respond to unexpectedly strong and volatile demand, as discussed in further detail above in "Consolidated Results of Operations."

Segment operating income excluding non-run-rate items for the nine months endedSeptember 30, 2015 was $22.0 millionhigher than operating income excluding such items for the nine months endedSeptember 30, 2014. Higher operating income excluding non-run-rate items primarily reflected (i) a positive sales impact of $25.8 million due primarily to increased shipments of Automotive Extrusions and Aero/HS products and improved spot pricing on certain Aero/HS and GE products and (ii) approximately $1.0 million from improved manufacturing cost efficiencies, offset by (iii) $3.7 million of higher costs primarily reflecting higher overhead and benefit costs and (iv) $1.1 million of higher depreciation.

The table below provides shipment and value added revenue information (in millions of dollars except shipments and per pound amounts) for each of the product categories (which are based on end market applications) of our Fabricated Products segment for each period presented:

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	Quarter Ended September 30,												Nine Months Ended September 30,
	2015						2014						2015						2014
Aero/HS Products:
Shipments (mmlbs)	58.9						58.9						183.6						176.1
	$			$ / lb			$			$ / lb			$			$ / lb			$			$ / lb
Net sales	$	170.0		$	2.89		$	172.5		$	2.93		$	531.4		$	2.89		$	509.1		$	2.89
Less: hedged cost of alloyed metal	(56.7		)	(0.97		)	(65.9		)	(1.12		)	(191.9		)	(1.04		)	(185.9		)	(1.05		)
Value added revenue	$	113.3		$	1.92		$	106.6		$	1.81		$	339.5		$	1.85		$	323.2		$	1.84
Automotive Extrusions:
Shipments (mmlbs)	24.3						19.6						70.8						59.3
	$			$ / lb			$			$ / lb			$			$ / lb			$			$ / lb
Net sales	$	49.5		$	2.04		$	44.0		$	2.24		$	153.3		$	2.17		$	129.5		$	2.18
Less: hedged cost of alloyed metal	(21.1		)	(0.87		)	(21.4		)	(1.09		)	(70.2		)	(1.00		)	(60.7		)	(1.02		)
Value added revenue	$	28.4		$	1.17		$	22.6		$	1.15		$	83.1		$	1.17		$	68.8		$	1.16
GE Products:
Shipments (mmlbs)	55.8						54.2						175.6						175.1
	$			$ / lb			$			$ / lb			$			$ / lb			$			$ / lb
Net sales	$	100.4		$	1.80		$	103.6		$	1.91		$	331.5		$	1.89		$	323.1		$	1.85
Less: hedged cost of alloyed metal	(50.3		)	(0.90		)	(60.4		)	(1.11		)	(179.1		)	(1.02		)	(182.2		)	(1.05		)
Value added revenue	$	50.1		$	0.90		$	43.2		$	0.80		$	152.4		$	0.87		$	140.9		$	0.80
Other Products:
Shipments (mmlbs)	11.5						11.6						38.2						37.3
	$			$ / lb			$			$ / lb			$			$ / lb			$			$ / lb
Net sales	$	16.5		$	1.43		$	18.8		$	1.62		$	59.1		$	1.55		$	56.4		$	1.51
Less: hedged cost of alloyed metal	(9.0		)	(0.78		)	(11.4		)	(0.98		)	(34.2		)	(0.90		)	(34.3		)	(0.92		)
Value added revenue	$	7.5		$	0.65		$	7.4		$	0.64		$	24.9		$	0.65		$	22.1		$	0.59
Total:
Shipments (mmlbs)	150.5						144.3						468.2						447.8
	$			$ / lb			$			$ / lb			$			$ / lb			$			$ / lb
Net sales	$	336.4		$	2.24		$	338.9		$	2.35		$	1,075.3		$	2.30		$	1,018.1		$	2.27
Less: hedged cost of alloyed metal	(137.1		)	(0.92		)	(159.1		)	(1.10		)	(475.4		)	(1.02		)	(463.1		)	(1.03		)
Value added revenue	$	199.3		$	1.32		$	179.8		$	1.25		$	599.9		$	1.28		$	555.0		$	1.24

For the quarter ended September 30, 2015, Net sales of Fabricated Products decreased by 1% to $336.4 million, as compared to the quarter ended September 30, 2014, reflecting a 5% decrease in average realized sales price per pound, partially offset by a 4% increase in Fabricated Products segment shipment volume as discussed in further detail above in "Consolidated Results of Operations."

For the nine months endedSeptember 30, 2015, Net sales of Fabricated Products increased by 6% to $1,075.3 million, as compared to the quarter ended September 30, 2014, primarily reflecting a 5% increase in Fabricated Products segment shipment volume. See "Consolidated Results of Operations" above for further discussion.

Outlook

We expect normal seasonal demand weakness in the fourth quarter of 2015 to be partially offset by strong throughput and improved manufacturing cost efficiency at our Trentwood facility. In addition, we anticipate some improvement in cost

47

efficiency in our automotive operations, despite volatile and unpredictable order patterns continuing to present a challenge early in the fourth quarter of 2015. Routine major maintenance expense in the fourth quarter of 2015 is expected to bring the total second half 2015 impact for planned maintenance and related costs to approximately $8.0 million to $10.0 million higher than the first half of 2015 with $6.0 million of the impact already incurred in the third quarter.

Overall, we continue to expect the value added revenue for 2015 to be at the high end of the outlook for 7% to 9% year-over-year growth driven by strong demand for aerospace and automotive applications in addition to some benefit from improved pricing and lower contained metal costs.

As we gain more visibility into 2016, we expect solid year-over-year value added revenue growth driven once again by higher shipments of aerospace and automotive applications. Our heat treat plate order book is strong, and our lead times for these products continue to extend well into the first half of 2016. Demand for our automotive extrusion applications remains on a strong growth trajectory as we continue to have numerous new launches and expect another year of double-digit value added revenue growth for these applications. Overall we expect another year of strong top-line growth in 2016 and continued improvement in manufacturing cost efficiencies.

All Other

All Other provides support for our operations and incurs general and administrative expenses that are not allocated to the Fabricated Products segment. All Other is not considered a reportable segment. The table below presents the impact of non-run-rate items to operating loss within the All Other business unit for each period presented (in millions of dollars):

	Quarter Ended September 30,						Nine Months Ended September 30,
	2015			2014			2015			2014
Operating loss	$	(6.8	)	$	(3.0	)	$	(523.9	)	$	(10.1	)
Impact to operating loss of non-run-rate items:
Net periodic benefit (cost) income relating to the VEBAs1	(0.6		)	6.0			(1.8		)	17.7
Gain (loss) on removal of Union VEBA net assets1	2.9			—			(490.9		)	—
Environmental expense	0.4			0.5			0.4			0.5
Total non-run-rate items	2.7			6.5			(492.3		)	18.2
Operating loss excluding non-run-rate items	$	(9.5	)	$	(9.5	)	$	(31.6	)	$	(28.3	)

_____________________

¹  See Note 5 of Notes to Interim Consolidated Financial Statements included in this Report for additional information relating to the VEBAs.

All Other operating loss excluding non-run-rate items for the quarter ended September 30, 2015 was unchanged compared to the same period in 2014 as SG&A and R&D remained consistent for each period.

All Other operating loss excluding non-run-rate items for the nine months endedSeptember 30, 2015 was $3.3 millionhigher than the comparable period in 2014 due primarily to an increase in SG&A and R&D of $3.1 million.

Liquidity and Capital Resources

Summary

The following table summarizes our liquidity at the dates presented (in millions of dollars):

	September 30, 2015		December 31, 2014
Available cash and cash equivalents	$	82.6	$	177.7
Short-term investments	30.0		114.0
Net borrowing availability under Revolving Credit Facility after borrowings and letters of credit	239.1		269.1
Total liquidity	$	351.7	$	560.8

Cash equivalents consist primarily of money market accounts and investments with an original maturity of 90 days or less when purchased. We place our cash in bank deposits and money market funds with high credit quality financial institutions,

48

which invest primarily in commercial paper and time deposits of prime quality, short-term repurchase agreements and U.S. government agency notes. Short-term investments represent holdings in investment-grade commercial paper and corporate bonds with a maturity of greater than 90 days.

Available cash and cash equivalents and short term investments were $112.6 million at September 30, 2015, compared to $291.7 million at December 31, 2014. The decrease was primarily driven by (i) cash outflow from certain investing and financing activities consisting of capital expenditures, net cash outlay to settle the Convertible Notes, repurchases of common stock, the payment of quarterly dividends and the repurchase of $6.1 million aggregate principal amount of our Senior Notes for 107.5% of the face value and (ii) the payments during the first quarter of 2015 to the VEBAs of $13.7 million of annual variable cash contributions with respect to 2014, partially offset by cash inflow from operating activities and proceeds from the sale of available for sale securities.

In addition to our unrestricted cash and cash equivalents described above, we have restricted cash totaling $10.9 million at September 30, 2015 that is pledged or held as collateral in connection with workers’ compensation requirements and certain other agreements. From time to time, such restricted funds could be returned to us or we could be required to pledge additional cash (see Note 2 of Notes to Interim Consolidated Financial Statements included in this Report).

We and certain of our subsidiaries have a credit agreement with JPMorgan Chase Bank, N.A., as administrative agent and the other financial institutions party thereto ("Revolving Credit Facility") (see Note 3 of Notes to Interim Consolidated Financial Statements in this Report). There were no borrowings under our Revolving Credit Facility as of September 30, 2015, or as of December 31, 2014.

Cash Flows

The following table summarizes our cash flows from operating, investing and financing activities for each period presented (in millions of dollars):

	Nine Months Ended September 30,
	2015			2014
Total cash provided by (used in):
Operating activities:
Fabricated Products	$	160.4		$	159.5
All Other	(51.5		)	(55.8		)
Total cash provided by operating activities	$	108.9		$	103.7
Investing activities:
Fabricated Products	$	(37.8	)	$	(38.8	)
All Other	82.9			27.3
Total cash provided (used) by investing activities	$	45.1		$	(11.5	)
Financing activities:
Fabricated Products	$	—		$	—
All Other	(249.1		)	(49.4		)
Total cash used by financing activities	$	(249.1	)	$	(49.4	)

Operating Activities

Fabricated Products— For the nine months endedSeptember 30, 2015, Fabricated Products segment operating activities provided $160.4 million of cash. Cash provided in the nine months endedSeptember 30, 2015 was primarily related to (i) $142.8 million of operating income and (ii) adjustments for non-cash items and depreciation and amortization of $34.3 million; partially offset by (iii) an increase in inventory of $2.6 million due primarily to increased shipment volume and (iv) a decrease in accounts payable of $13.9 million due to the timing of payments and decreasing price of aluminum.

Fabricated Products segment operating activities provided $159.5 million of cash during the nine months endedSeptember 30, 2014. Cash provided in the nine months endedSeptember 30, 2014 was primarily related to (i) $121.2 million of operating income; (ii) adjustments for non-cash items and depreciation and amortization of $27.7 million; (iii) a decrease in inventory of $3.1 million due primarily to a lower inventory level following Trentwood’s capital improvement project and increased shipment volume; and (iv) an increase in accounts payable of $29.5 million due to an increase in general business activities and the timing of payments. Cash provided in the nine months endedSeptember 30, 2014 was partially offset by (i)

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an increase in accounts receivable of $11.1 million; (ii) an increase in prepaid assets of $1.1 million; and (iii) a $6.3 million decrease in other accrued liabilities due primarily to a decrease in accrued salaries and wages.

For additional information regarding Fabricated Products operating income excluding non-run-rate items, see "Results of Operations —Segment and Business Unit Information" above.

All Other— Cash used in operating activities of $51.5 million during the nine months endedSeptember 30, 2015 consistedprimarily of payments relating to (i) general and administrative costs of $20.9 million; (ii) an annual variable cash contribution to the VEBAs of $13.7 million with respect to the 2014 year; (iii) our short-term incentive program in the amount of $3.4 million; and (iv) interest on the Convertible Notes, Senior Notes and Revolving Credit Facility of $13.5 million.

Cash used in operating activities of $55.8 million during the nine months endedSeptember 30, 2014 consisted primarily of payments relating to (i) general and administrative costs of $22.7 million; (ii) an annual variable cash contribution to the VEBAs of $16.0 million with respect to the 2013 year; (iii) our short-term incentive program in the amount of $4.3 million; and (iv) interest on the Convertible Notes, Senior Notes, and Revolving Credit Facility of $12.2 million.

Investing Activities

Fabricated Products— Cash used in investing activities for the Fabricated Products segment during the nine months endedSeptember 30, 2015 was $37.8 million, compared to $38.8 million of cash used during the nine months endedSeptember 30, 2014. Cash used during the nine months endedSeptember 30, 2015 and September 30, 2014 was related to capital expenditures.

All Other — Cash provided by investing activities for All Other was $82.9 million during the nine months endedSeptember 30, 2015 and primarily consisted of proceeds from the disposition of available for sale securities. A portion of the proceeds was used to settle the Convertible Notes on April 1, 2015. Cash provided by investing activities for All Other during the nine months endedSeptember 30, 2014 was $27.3 million, which primarily consisted of $28.8 million net cash inflow in conducting investment activities with respect to our available for sale securities, partially offset by $0.8 million of capital expenditures.

Financing Activities

All Other — Cash used in financing activities during the nine months endedSeptember 30, 2015 was $249.1 million, representing (i) net cash outlay of $175.0 million to settle the Convertible Notes; (ii) $45.1 million of cash used to repurchase our common stock under our stock repurchase program; (iii) $21.0 million of cash dividends paid to our stockholders, including holders of restricted stock, and dividend equivalents paid to holders of certain restricted stock units and to holders of performance shares granted prior to 2014, with respect to the target number of underlying shares of common stock (constituting approximately one-half of the maximum payout); (iv) $3.0 million of cash used to repurchase our common stock to satisfy withholding taxes resulting from the vesting of employee restricted stock, restricted stock units and performance shares; (v) a repurchase of $6.1 million of our Senior Notes; partially offset by (vi) $1.1 million of additional tax benefit in connection with the vesting of employee non-vested shares, restricted stock units and performance shares.

Cash used in financing activities during the nine months endedSeptember 30, 2014 was $49.4 million, representing (i) $28.7 million of cash used to repurchase our common stock under our stock repurchase program; (ii) $19.1 million of cash dividends paid to our stockholders, including holders of restricted stock, and dividend equivalents paid to holders of certain restricted stock units and to holders of performance shares with respect to approximately one-half of the performance shares; (iii) $2.4 million of cash used to repurchase our common stock to satisfy withholding taxes resulting from the vesting of employee restricted stock, restricted stock units and performance shares; partially offset by (iv) $0.8 million of additional tax benefit in connection with the vesting of employee non-vested shares, restricted stock units and performance shares.

Sources of Liquidity

We believe our available cash and cash equivalents, short-term investments, borrowing availability under the Revolving Credit Facility and funds generated from operations are our most significant sources of liquidity. We believe these sources will be sufficient to finance our cash requirements and our planned capital expenditures and investments for at least the next 12 months. Nevertheless, our ability to fund our working capital requirements, debt service obligations, the full amount of any variable cash contribution to the VEBAs and planned capital expenditures and investments will depend upon our future operating performance (which will be affected by prevailing economic conditions) and financial, business and other factors, some of which are beyond our control.

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The Revolving Credit Facility matures in September 2016 and provides for borrowings up to $300.0 million (subject to borrowing base limitations), of which up to a maximum of $60.0 million may be utilized for letters of credit. The Revolving Credit Facility may, subject to certain conditions and the agreement of lenders thereunder, be increased up to $350.0 million.

The table below summarizes recent availability and usage of our Revolving Credit Facility (in millions of dollars except for borrowing rate):

	October 19, 2015			September 30, 2015
Revolving Credit Facility borrowing commitment	$	300.0		$	300.0
Borrowing base availability	253.2			246.5
Less: Outstanding borrowings under Revolving Credit Facility	—			—
Less: Outstanding letters of credit under Revolving Credit Facility	(7.3		)	(7.4		)
Net remaining borrowing availability	$	245.9		$	239.1
Borrowing rate (if applicable)1	4.0		%	4.0		%

_______________________

¹  Such borrowing rate, if applicable, represents the interest rate for any overnight borrowings under the Revolving Credit Facility.

We do not believe that covenants contained in the Revolving Credit Facility are reasonably likely to limit our ability to raise additional debt or equity should we choose to do so during the next 12 months, nor do we believe it is likely that during the next 12 months we will trigger the availability threshold that would require measuring and maintaining a fixed charge coverage ratio.

See Note 3 of Notes to Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2014 for information regarding our Revolving Credit Facility.

Debt

See "Contractual Obligations, Commercial Commitments and Off-Balance Sheet and Other Arrangements - Contractual Obligations and Commercial Commitments" included in Part II, Item 7. "Management’s Discussion and Analysis of Financial Condition and Results of Operations" in our Annual Report on Form 10-K for the year ended December 31, 2014 for mandatory principal and cash interest payments on the outstanding borrowings.

We do not believe that covenants in the indenture governing the Senior Notes are reasonably likely to limit our ability to obtain additional debt or equity financing should we choose to do so during the next 12 months.

Capital Expenditures and Investments

A component of our long-term strategy is our capital expenditure program, including our organic growth initiatives and value-creating acquisitions. Total capital expenditures were $38.4 million and $39.6 million for the nine months endedSeptember 30, 2015 and September 30, 2014, respectively.

Capital spending during the nine months endedSeptember 30, 2015 was due primarily to capital upgrades at several of our extrusion facilities to support new automotive programs that will launch over the next few years. The rest of our capital spending was spread among our manufacturing locations on projects expected to continue to reduce operating costs, improve quality, increase capacity or enhance operational security. In 2015, we anticipate capital spending will be in the $50.0 million to $60.0 million range as we continue our capacity expansions for our Automotive Extrusions. Capital investment will be funded using cash generated from operations, available cash and cash equivalents, short-term investments, borrowings under the Revolving Credit Facility and/or other third-party financing arrangements.

The level of anticipated capital expenditures may be adjusted from time to time depending on our business plans, our price outlook for fabricated aluminum products, our ability to maintain adequate liquidity and other factors. No assurance can be provided as to the timing of any such expenditures or the operational benefits expected therefrom.

51

Dividends

See Note 10 and Note 16 of Notes to Interim Consolidated Financial Statements included in this Report for information regarding dividends paid during the nine months endedSeptember 30, 2015 and September 30, 2014, and declared subsequent to September 30, 2015.

The future declaration and payment of dividends, if any, will be at the discretion of our Board of Directors and will depend on a number of factors, including our financial and operating results, financial condition and anticipated cash requirements and covenants contained in the Revolving Credit Facility, the indenture for our 8.25% Senior Notes due 2020, or other indebtedness we may incur in the future. We can give no assurance that dividends will be declared and paid in the future. See Note 3 of Notes to Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2014 for additional information about restrictions on dividend payments.

Repurchases of Common Stock

See Note 10 of Notes to Interim Consolidated Financial Statements included in this Report for information regarding repurchases of common stock made during the nine months endedSeptember 30, 2015 and September 30, 2014 and for a discussion of warrants related to the Convertible Notes ("Warrants").

See Note 6 of Notes to Interim Consolidated Financial Statements included in this Report for information regarding minimum statutory tax withholding obligations arising during the nine months ended September 30, 2015 and September 30, 2014 in connection with the vesting of non-vested shares, restricted stock units and performance shares.

Restrictions Related to Equity Capital

Our certificate of incorporation places restrictions on the transfer of our common shares through July 2016. These restrictions are intended to reduce the risk that an ownership change within the criteria under Section 382 of the Internal Revenue Code of 1986 would jeopardize our ability to fully use our federal income tax attributes.

Environmental Commitments and Contingencies

See Note 7 of Notes to Interim Consolidated Financial Statements included in this Report for information regarding our environmental commitments and contingencies.

Contractual Obligations, Commercial Commitments and Off-Balance Sheet and Other Arrangements

During the nine months endedSeptember 30, 2015, we granted additional stock-based awards to certain members of management and our non-employee directors under our equity and performance incentive plan (see Note 6 of Notes to Interim Consolidated Financial Statements included in this Report). Additional awards are expected to be made in future years.

In accordance with our funding obligation to the VEBAs (see Note 5 of Notes to Interim Consolidated Financial Statements included in this Report), we paid $13.7 million to the VEBAs during the first quarter of 2015 with respect to 2014.

See Note 7 of Notes to Interim Consolidated Financial Statements included in this Report for more information on purchase obligations we incurred during the nine months endedSeptember 30, 2015.

With the exception of the above-mentioned transactions and as otherwise disclosed herein, there has been no material change in our contractual obligations, commercial commitments, off-balance sheet or other arrangements other than in the ordinary course of business since December 31, 2014.

52

Critical Accounting Estimates and Policies

Our consolidated financial statements are prepared in accordance with GAAP. In connection with the preparation of our financial statements, we are required to make assumptions and estimates about future events, and apply judgments that affect the reported amounts of assets, liabilities, revenue and expenses and the related disclosures. We base our assumptions, estimates and judgments on historical experience, current trends and other factors that management believes to be relevant at the time our consolidated financial statements are prepared. On a regular basis, management reviews the accounting policies, assumptions, estimates and judgments to ensure that our financial statements are presented fairly and in accordance with GAAP. However, because future events and their effects cannot be determined with certainty, actual results could differ from our assumptions and estimates and such differences could be material.

Our significant accounting policies are discussed in Note 1 of Notes to Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2014 and Note 1 of Notes to Interim Consolidated Financial Statements included in this Report. We discuss our critical accounting estimates in Part II, Item 7. "Management’s Discussion and Analysis of Financial Condition and Results of Operations" of our Annual Report on Form 10-K for the year ended December 31, 2014. There has been no material change in our critical accounting estimates and policies since December 31, 2014.

New Accounting Pronouncements

For a discussion of all recently adopted and recently issued but not yet adopted accounting pronouncements, see “New Accounting Pronouncements” in Note 1 of Notes to Interim Consolidated Financial Statements included in this Report.

Available Information

Our website is located at www.kaiseraluminum.com. The website includes a section for investor relations under which we provide notifications of news or announcements regarding our financial performance, including Securities and Exchange Commission ("SEC") filings, investor events and press and earnings releases. In addition, all Kaiser Aluminum Corporation filings submitted to the SEC, including our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and Proxy Statements for our annual meeting of stockholders, as well as other Kaiser Aluminum Corporation reports and statements, are available on the SEC’s web site at www.sec.gov. Such filings are also available for download free of charge on our website. In addition, we provide and archive on our website webcasts of our quarterly earnings calls and certain events in which management participates or hosts with members of the investment community, and related investor presentations. The contents of the website are not intended to be incorporated by reference into this Report or any other report or document filed by us, and any reference to the websites are intended to be inactive textual references only.

Item 3.Quantitative and Qualitative Disclosures About Market Risk

Our operating results are sensitive to changes in the prices of primary aluminum and fabricated aluminum products, and also depend to a significant degree upon the volume and mix of all products sold. As discussed more fully in Note 8 of Notes to Interim Consolidated Financial Statements included in this Report, we have historically utilized hedging transactions to lock in a specified price or range of prices for certain products which we sell or consume in our production process and to mitigate our exposure to changes in energy prices and foreign currency exchange rates.

Aluminum

See Note 8 of Notes to Interim Consolidated Financial Statements included in this Report, under “Hedges of Operational Risk” for a discussion of our pricing of fabricated aluminum, firm-price arrangements and third-party hedging instruments.

Based on the aluminum derivative positions held by us to hedge firm-price customer sales agreements, we estimate that a $0.10 per pound decrease in the LME market price of aluminum, with all other variables held constant, would have resulted in unrealized mark-to-market losses of $14.6 million and $6.7 million on September 30, 2015 and December 31, 2014, respectively, with corresponding changes to the net fair value of our aluminum derivative positions. Additionally, we estimate that a $0.01 per pound decrease in the Midwest premium for aluminum, with all other variables held constant, would have resulted in unrealized mark-to-market losses of $0.9 million and $0.7 million on September 30, 2015 and December 31, 2014, respectively. The balances of such financial instruments may change in future periods, and therefore the amounts discussed above may not be indicative of future results.

If we continue to encounter reductions in the price of aluminum and/or if we experience a decrease in our net realizable value of inventory, we may be subject to inventory lower-of-cost-or-market value adjustments.

53

Energy

We are exposed to energy price risk from fluctuating prices for natural gas and electricity. We estimate that, before consideration of any hedging activities and the potential to pass through higher natural gas and electricity prices to customers, each $1.00 change in natural gas (per mmbtu) and electricity (per mwh) prices would impact our 2015 annual operating costs by approximately $4.2 million and $0.5 million, respectively. We, from time to time, in the ordinary course of business, enter into hedging transactions with third parties to mitigate our risk from fluctuations in natural gas and electricity prices.

As of September 30, 2015, we had Henry Hub NYMEX-based hedge positions in place to mitigate our exposure to fluctuations in natural gas prices for approximately 76%, 75%, 57% and 11% of the expected natural gas purchases for the remainder of 2015, 2016, 2017 and 2018, respectively. We estimate that a $1.00 per mmbtu decrease in natural gas prices would have resulted in unrealized mark-to-market losses of $6.8 million and $6.7 million on September 30, 2015 and December 31, 2014, respectively, with corresponding changes to the net fair value of our natural gas derivative positions.

Additionally, as of September 30, 2015, we had Mid-C International Commodity Exchange-based hedge positions, as well as physical delivery commitments with energy companies in place to cover our exposure to fluctuations in electricity prices for approximately 54% of the expected electricity purchases for the remainder of 2015 and each of 2016 and 2017. We estimate that a $5.00 per mwh decrease in electricity prices would have resulted in unrealized mark-to-market losses of $0.2 million and $0.9 million on September 30, 2015 and December 31, 2014, respectively, with corresponding changes to the net fair value of our electricity derivative positions.

The balances of such financial instruments for hedging of natural gas and electricity may change in future periods, and therefore the amounts discussed above may not be indicative of future results.

Foreign Currency

During the nine months endedSeptember 30, 2015, we entered into cash commitments for an equipment purchase denominated in euros and hedged our exposure to currency exchange rate fluctuations by entering into foreign currency forward contracts with settlement dates designed to line up with the timing of scheduled payments to the foreign equipment manufacturer. These derivative instruments are designated and qualify as cash flow hedges, therefore periodic gains and losses related to market value adjustments are deferred in Accumulated other comprehensive loss until depreciation on the underlying equipment commences. See Note 8 of Notes to Interim Consolidated Financial Statements included in this Report for additional information relating to these foreign currency forward contracts. As of September 30, 2015, we hedged our equipment purchase transactions denominated in euros using forward contracts with settlement dates through December 2016. We estimate that a 10% decrease in the September 30, 2015 exchange rate of euros to US dollars would have resulted in unrealized mark-to-market losses of $0.8 million as of September 30, 2015.

Other than the cash flow hedges discussed above, there have been no other changes or developments that would materially affect the foreign currency risk assessment performed as of December 31, 2014.

Item 4.Controls and Procedures

Evaluation of Disclosure Controls and Procedures. We maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed in our reports under the Securities Exchange Act of 1934 is processed, recorded, summarized and reported within the time periods specified in the Securities and Exchange Commission's rules and forms and that such information is accumulated and communicated to management, including the principal executive officer and principal financial officer, to allow for timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and management is required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures. An evaluation of the effectiveness of the design and operation of our disclosure controls and procedures was performed as of the end of the period covered by this Report under the supervision of and with the participation of our management, including the principal executive officer and principal financial officer. Based on that evaluation, our principal executive officer and principal financial officer concluded that our disclosure controls and procedures were effective as of September 30, 2015 at the reasonable assurance level.

Changes in Internal Control Over Financial Reporting. We had no changes in our internal control over financial reporting during the quarter ended September 30, 2015 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

54

PART II – OTHER INFORMATION

Item 1.Legal Proceedings

Reference is made to Part I, Item 3. “Legal Proceedings” included in our Annual Report on Form 10-K for the year ended December 31, 2014 for information concerning material legal proceedings with respect to the Company. There have been no material developments since December 31, 2014.

Item 1A.Risk Factors

Reference is made to Part I, Item 1A. “Risk Factors” included in our Annual Report on Form 10-K for the year ended December 31, 2014 for information concerning risk factors. There have been no material changes in risk factors since December 31, 2014.

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

The following table provides information regarding our repurchases of our common shares during the quarter ended September 30, 2015:

	Amended and Restated 2006 Equity and Performance Incentive Plan			Stock Repurchase Plan
	Total Number of Shares Purchased1	Average Price per Share		Total Number of Shares Purchased2	Average Price per Share		Maximum Dollar Value of Shares that May Yet Be Purchased Under the Programs (millions)2
July 1, 2015 - July 31, 2015	—	$	—	11,689	$	83.61	$	130.2
August 1, 2015 - August 31, 2015	14	83.24		17,835	82.95		$	128.7
September 1, 2015 - September 30, 2015	98	82.97		17,419	82.29		$	127.3
Total	112	$	83.00	46,943	$	82.87	N/A

__________________________

¹  Under our equity and performance incentive plan, participants may elect to have us withhold common shares to satisfy minimum statutory tax withholding obligations arising from the recognition of income and the vesting of restricted stock, restricted stock units and performance shares. When we withhold these shares, we are required to remit to the appropriate taxing authorities the market price of the shares withheld by us on the date of withholding. The withholding of common shares by us could be deemed a purchase of such common shares. During the quarter ended September 30, 2015, we withheld 112 shares of common stock to satisfy employee tax withholding obligations. All such shares were withheld and canceled by us on the applicable vesting dates or dates on which income to the employees was recognized, and the number of shares withheld was determined based on the closing price per common share as reported on the Nasdaq Global Select Market on such dates.

²  Of the remaining value of shares that may yet be purchased pursuant to the stock repurchase plan, $75.0 million was authorized by our Board of Directors in December 2013 and an additional $100.0 million was authorized on April 14, 2015. Repurchase transactions will occur at such times and prices as management deems appropriate and will be funded with our excess liquidity after giving consideration to internal and external growth opportunities and future cash flows. Repurchases may be in open-market transactions or in privately negotiated transactions, and the program may be modified or terminated by our Board of Directors at any time.

During the quarter ended September 30, 2015, 516,220 shares of our common stock were issued and 23,118 shares of our common stock were pending settlement in connection with exercises of the Warrants. The Warrants were net-share-settled and accordingly we did not receive any proceeds from their exercise. The shares of common stock issued upon exercise of the Warrants were issued in reliance on the exemption from registration provided by Section 3(a)(9) of the Securities Act of 1933, as amended, and no underwriters were used in connection with the Warrant exercises. For additional information related to the Warrants, see Notes 3, 10 and 16 of Notes to Interim Consolidated Financial Statements included in this Report.

55

Item 3.Defaults Upon Senior Securities

None.

Item 4. Mine Safety Disclosures

Not applicable.

Item 5.Other Information

None.

Item 6.Exhibits

Exhibit Number	Description
*31.1	Certification of Jack A. Hockema pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
*31.2	Certification of Daniel J. Rinkenberger pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
*32.1	Certification of Jack A. Hockema pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
*32.2	Certification of Daniel J. Rinkenberger pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
* 101.INS	XBRL Instance
* 101.SCH	XBRL Taxonomy Extension Schema
*101.CAL	XBRL Taxonomy Extension Calculation
* 101.DEF	XBRL Taxonomy Extension Definition
* 101.LAB	XBRL Taxonomy Extension Label
* 101.PRE	XBRL Taxonomy Extension Presentation

* Filed herewith.

56

SIGNATURES

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

KAISER ALUMINUM CORPORATION

/s/ Daniel J. Rinkenberger

Daniel J. Rinkenberger 

Executive Vice President and Chief Financial Officer

(Principal Financial Officer) 

/s/ Neal West  

Neal West 

Vice President and Chief Accounting Officer

(Principal Accounting Officer) 

Date: October 22, 2015

57

INDEX TO EXHIBITS

Exhibit Number	Description
*31.1	Certification of Jack A. Hockema pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
*31.2	Certification of Daniel J. Rinkenberger pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
*32.1	Certification of Jack A. Hockema pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
*32.2	Certification of Daniel J. Rinkenberger pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
* 101.INS	XBRL Instance
* 101.SCH	XBRL Taxonomy Extension Schema
*101.CAL	XBRL Taxonomy Extension Calculation
* 101.DEF	XBRL Taxonomy Extension Definition
* 101.LAB	XBRL Taxonomy Extension Label
* 101.PRE	XBRL Taxonomy Extension Presentation

* Filed herewith.

58

EX-31.1

Exhibit 31.1

CERTIFICATION PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, Jack A. Hockema, certify that:

1.I have reviewed this report on Form 10-Q of Kaiser Aluminum Corporation;

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

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

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

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

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

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

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

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

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

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

		/s/ Jack A. Hockema
		Jack A. Hockema
		President and Chief Executive Officer
Date:	October 22, 2015

A signed original of this written statement required by Section 302 has been provided to Kaiser Aluminum Corporation and will be retained by Kaiser Aluminum Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

EX-31.2

Exhibit 31.2

CERTIFICATION PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, Daniel J. Rinkenberger, certify that:

1.I have reviewed this report on Form 10-Q of Kaiser Aluminum Corporation;

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

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

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

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

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

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

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

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

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

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

		/s/ Daniel J. Rinkenberger
		Daniel J. Rinkenberger
		Executive Vice President and Chief Financial Officer
Date:	October 22, 2015

A signed original of this written statement required by Section 302 has been provided to Kaiser Aluminum Corporation and will be retained by Kaiser Aluminum Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. 1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

October 22, 2015

In connection with the Quarterly Report on Form 10-Q by Kaiser Aluminum Corporation, a Delaware corporation (the “Company”), for the quarter ended September 30, 2015 (the “Report”), as filed on the date hereof with the Securities and Exchange Commission, the undersigned, Jack A. Hockema, President and Chief Executive Officer of the Company, does hereby certify, pursuant to 18 U.S.C. 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to such officer’s knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company as of the dates and for the periods expressed in the Report.

IN WITNESS WHEREOF, the undersigned has executed this certification as of the date first above written.

/s/ Jack A. Hockema

Jack A. Hockema

President and Chief Executive Officer

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

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. 1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

October 22, 2015

In connection with the Quarterly Report on Form 10-Q by Kaiser Aluminum Corporation, a Delaware corporation (the “Company”), for the quarter ended September 30, 2015 (the “Report”), as filed on the date hereof with the Securities and Exchange Commission, the undersigned, Daniel J. Rinkenberger, Executive Vice President and Chief Financial Officer of the Company, does hereby certify, pursuant to 18 U.S.C. 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to such officer’s knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company as of the dates and for the periods expressed in the Report.

IN WITNESS WHEREOF, the undersigned has executed this certification as of the date first above written.

/s/ Daniel J. Rinkenberger

Daniel J. Rinkenberger

Executive Vice President and Chief Financial Officer

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

XML

Summary of Significant Accounting Policies, Textuals (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Significant accounting policies
Percentage of Employees Covered by Collective Bargaining Agreements	63.00%
Percentage of Employees Covered by Collective Bargaining Agreements Expiring Within One Year	5.00%
Fabricated Products
Significant accounting policies
(Shortfalls) excess of current cost over the stated LIFO value of inventory	$ (13.4)	$ 37.6

XML

Derivative Financial Instruments and Related Hedging Programs, Realized and Unrealized Gains (Losses) Table (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Summary Of Realized And Unrealized Gains (Losses)
Unrealized gains (losses)			$ (7.7)	$ 3.6
Not Designated as Hedging Instrument
Summary Of Realized And Unrealized Gains (Losses)
Unrealized gains (losses)	$ (1.7)	$ (1.3)	(7.7)	3.6
Operational Risk Hedges | Not Designated as Hedging Instrument
Summary Of Realized And Unrealized Gains (Losses)
Realized (losses) gains	(10.5)	3.1	(24.0)	6.4
Unrealized gains (losses)	(1.7)	(3.5)	(7.7)	0.0
Foreign Currency Member | Operational Risk Hedges | Designated as Hedging Instrument [Member]
Summary Of Realized And Unrealized Gains (Losses)
Unrealized gains (losses)	0.0	0.0	(0.2)	0.0
Foreign Currency Member | Operational Risk Hedges | Not Designated as Hedging Instrument
Summary Of Realized And Unrealized Gains (Losses)
Unrealized gains (losses)	0.0	0.1	0.0	0.0
Aluminum | Operational Risk Hedges | Not Designated as Hedging Instrument
Summary Of Realized And Unrealized Gains (Losses)
Realized (losses) gains	(9.0)	3.1	(18.8)	5.2
Unrealized gains (losses)	(0.3)	(1.0)	(8.8)	1.3
Natural Gas | Operational Risk Hedges | Not Designated as Hedging Instrument
Summary Of Realized And Unrealized Gains (Losses)
Realized (losses) gains	(1.2)	(0.1)	(3.8)	1.1
Unrealized gains (losses)	(1.0)	(1.6)	(0.2)	(1.0)
Electricity | Operational Risk Hedges | Not Designated as Hedging Instrument
Summary Of Realized And Unrealized Gains (Losses)
Realized (losses) gains	(0.3)	0.1	(1.4)	0.1
Unrealized gains (losses)	(0.4)	(1.0)	1.3	(0.3)
Hedges Relating To Notes Member | Call Options | Not Designated as Hedging Instrument
Summary Of Realized And Unrealized Gains (Losses)
Unrealized gains (losses)	0.0	12.9	10.2	19.8
Hedges Relating To Notes Member | Bifurcated Conversion Feature | Not Designated as Hedging Instrument
Summary Of Realized And Unrealized Gains (Losses)
Unrealized gains (losses)	$ 0.0	$ (10.7)	$ (10.2)	$ (16.2)

XML

Employee Incentive Plans, Short Term Incentive Plans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Deferred Compensation Arrangement with Individual, Compensation Expense	$ (0.4)	$ 0.0	$ 0.1	$ 0.6
Short Term Incentive Plans [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Deferred Compensation Arrangement with Individual, Compensation Expense	2.9	2.9	10.8	9.9
Short Term Incentive Plans [Member] | Fabricated Products
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Deferred Compensation Arrangement with Individual, Compensation Expense	2.2	2.2	7.7	7.6
Short Term Incentive Plans [Member] | All Other
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Deferred Compensation Arrangement with Individual, Compensation Expense	0.7	0.7	3.1	2.3
Short Term Incentive Plans [Member] | Cost of products sold, excluding depreciation and amortization and other items
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Deferred Compensation Arrangement with Individual, Compensation Expense	1.0	1.3	3.2	3.8
Short Term Incentive Plans [Member] | SG&A and R&D
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Deferred Compensation Arrangement with Individual, Compensation Expense	$ 1.9	$ 1.6	$ 7.6	$ 6.1

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Derivative Financial Instruments and Related Hedging Programs, Notional Quantity Table (Details)	Sep. 30, 2015 EUR (€) MMBTU mmlbs MWH
Remainder of 2015
Derivative [Line Items]
Percentage of natural gas purchases for which the Company's exposure to fluctuations in gas prices had been substantially reduced	76.00%
Percentage of Electricity Purchases For Which Company Exposure To Fluctuations In Electricity Prices Have Been Reduced	54.00%
2016
Derivative [Line Items]
Percentage of natural gas purchases for which the Company's exposure to fluctuations in gas prices had been substantially reduced	75.00%
Percentage of Electricity Purchases For Which Company Exposure To Fluctuations In Electricity Prices Have Been Reduced	54.00%
2017
Derivative [Line Items]
Percentage of natural gas purchases for which the Company's exposure to fluctuations in gas prices had been substantially reduced	57.00%
Percentage of Electricity Purchases For Which Company Exposure To Fluctuations In Electricity Prices Have Been Reduced	54.00%
2018
Derivative [Line Items]
Percentage of natural gas purchases for which the Company's exposure to fluctuations in gas prices had been substantially reduced	11.00%
Not Designated as Hedging Instrument | Electricity Member | Fixed priced contracts | Purchase
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | MWH	44,180
Not Designated as Hedging Instrument | Aluminum | Fixed priced contracts | Purchase
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	148.9
Not Designated as Hedging Instrument | Aluminum | Fixed priced contracts | Sales
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	2.4
Not Designated as Hedging Instrument | Aluminum | Midwest premium swap contracts | Purchase
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	87.8
Not Designated as Hedging Instrument | Natural Gas | Fixed priced contracts | Purchase
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | MMBTU	6,820,000
Designated as Hedging Instrument [Member] | Foreign Currency Member | Fixed priced contracts | Purchase
Derivative [Line Items]
Notional amount of contracts | €	€ 7,315,000

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Employee Benefits, Defined Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Mar. 31, 2015	Sep. 30, 2015	Dec. 31, 2014	Dec. 31, 2013
VEBA Postretirement Medical Obligations
Accrued annual contribution to VEBAs	$ 0.0		$ 0.0	$ 13.7
VEBAs
VEBA Postretirement Medical Obligations
Cash flow in determining VEBA obligation			20.0
Accrued annual contribution to VEBAs				13.7	$ 16.0
VEBAs | Maximum
VEBA Postretirement Medical Obligations
Administrative expenses of the VEBAs	0.3		0.3
Variable cash contribution obligation to VEBAs	20.0		$ 20.0
VEBAs | Annual Cash Flows up to $20 Million
VEBA Postretirement Medical Obligations
Postretirement medical plan contribution obligation percentage			10.00%
VEBAs | Annual Cash Flows in Excess of $20 Million
VEBA Postretirement Medical Obligations
Postretirement medical plan contribution obligation percentage			20.00%
Union VEBA
VEBA Postretirement Medical Obligations
Percent allocation of total contribution between VEBAs			85.50%
Accrued Veba contingent contribution - total	44.1		$ 44.1
Defined Benefit Plan, Benefit Obligation				391.5
Defined Benefit Plan, Fair Value of Plan Assets				$ 731.6
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments		$ 307.8
Income Tax Expense (Benefit)	$ 184.4	$ 184.4
Salaried VEBA
VEBA Postretirement Medical Obligations
Percent allocation of total contribution between VEBAs			14.50%

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Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Calculation of basic and diluted earnings per share

Basic and diluted net income (loss) per share were calculated as follows, for each period presented (in millions of dollars, except share and per share amounts):

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015			2014
Numerator:
Net income (loss)	$	22.1	$	15.9	$	(249.9	)	$	56.2
Denominator - Weighted-average common shares outstanding (in thousands):
Basic1	17,123		17,707		17,178			17,853
Add: dilutive effect of non-vested common shares, restricted stock units and performance shares	305		134		—			143
Add: dilutive effect of warrants	744		778		—			596
Diluted2	18,172		18,619		17,178			18,592
Net income (loss) per common share, Basic:	$	1.29	$	0.90	$	(14.55	)	$	3.15
Net income (loss) per common share, Diluted:	$	1.21	$	0.85	$	(14.55	)	$	3.02

______________________

¹  The basic weighted-average number of common shares outstanding during the periods presented excludes non-vested common shares, restricted stock units and performance shares.

²  The diluted weighted-average number of common shares outstanding during the periods presented was calculated using the treasury method.

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

The following securities were excluded from the weighted-average diluted shares computation for the quarters and nine months endedSeptember 30, 2015 and September 30, 2014 as their inclusion would have been anti-dilutive (in thousands of shares):

	Quarter Ended		Nine Months Ended
	September 30,		September 30,
	2015	2014	2015	2014
Options to purchase common shares	—	20	17	20
Non-vested common shares, restricted stock units and performance shares	—	56	281	48
Warrants	—	—	773	—
Total excluded	—	76	1,071	68

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Guarantor and Non-Guarantor Financial Statements, Comprehensive Income Statements (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME
Net sales	$ 336.4	$ 338.9	$ 1,075.3	$ 1,018.1
Cost of products sold:
Cost of products sold, excluding depreciation and amortization and other items	267.3	280.4	864.4	838.8
Unrealized losses on derivative instruments	1.7	3.6	7.7	0.0
Depreciation and amortization	8.1	8.0	24.2	23.1
Selling, general, administrative, research and development	21.1	19.0	67.4	61.3
Net periodic postretirement benefit cost relating to Salaried VEBA	0.6	(6.0)	1.8	(17.7)
Gain on removal of Union VEBA net assets	(2.9)	0.0	490.9	0.0
Total selling, general, administrative, research and development	18.8	13.0	560.1	43.6
Total costs and expenses	295.9	306.3	1,456.4	907.0
Other operating charges, net	0.0	1.3	0.0	1.5
Operating (loss) income	40.5	32.6	(381.1)	111.1
Other (expense) income:
Interest expense	(4.9)	(9.7)	(19.9)	(27.7)
Other income (expense), net	(0.9)	2.2	(0.1)	5.9
(Loss) income before income taxes	34.7	25.1	(401.1)	89.3
Income tax (provision) benefit	(12.6)	(9.2)	151.2	(33.1)
Earnings in equity of subsidiaries	0.0	0.0	0.0	0.0
Net income	22.1	15.9	(249.9)	56.2
Comprehensive income	22.2	17.2	(182.5)	60.5
Parent
CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME
Net sales	0.0	0.0	0.0	0.0
Cost of products sold:
Cost of products sold, excluding depreciation and amortization and other items	0.0	0.0	0.0	0.0
Unrealized losses on derivative instruments	0.0	0.0	0.0	0.0
Depreciation and amortization	0.0	0.0	0.0	0.0
Selling, general, administrative, research and development	0.9	0.9	3.3	3.1
Net periodic postretirement benefit cost relating to Salaried VEBA	0.0	0.0	0.0	0.0
Gain on removal of Union VEBA net assets	0.0		0.0
Total selling, general, administrative, research and development	0.9	0.9	3.3	3.1
Total costs and expenses	0.9	0.9	3.3	3.1
Other operating charges, net		0.0		0.0
Operating (loss) income	(0.9)	(0.9)	(3.3)	(3.1)
Other (expense) income:
Interest expense	(4.7)	(9.4)	(19.1)	(28.0)
Other income (expense), net	(0.6)	2.2	(0.6)	3.6
(Loss) income before income taxes	(6.2)	(8.1)	(23.0)	(27.5)
Income tax (provision) benefit	0.0	0.0	0.0	0.0
Earnings in equity of subsidiaries	28.3	24.0	(226.9)	83.7
Net income	22.1	15.9	(249.9)	56.2
Comprehensive income	22.2	17.2	(182.5)	60.5
Guarantor Subsidiaries
CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME
Net sales	329.5	330.3	1,051.2	993.1
Cost of products sold:
Cost of products sold, excluding depreciation and amortization and other items	263.1	274.7	848.9	824.4
Unrealized losses on derivative instruments	1.7	3.6	7.7	0.0
Depreciation and amortization	7.8	7.7	23.3	22.3
Selling, general, administrative, research and development	18.4	17.2	58.6	52.3
Net periodic postretirement benefit cost relating to Salaried VEBA	0.6	(6.0)	1.8	(17.7)
Gain on removal of Union VEBA net assets	(2.9)		490.9
Total selling, general, administrative, research and development	16.1	11.2	551.3	34.6
Total costs and expenses	288.7	298.5	1,431.2	882.8
Other operating charges, net		1.3		1.5
Operating (loss) income	40.8	31.8	(380.0)	110.3
Other (expense) income:
Interest expense	(0.3)	(0.5)	(1.1)	(0.1)
Other income (expense), net	2.2	0.3	3.0	2.3
(Loss) income before income taxes	42.7	31.6	(378.1)	112.5
Income tax (provision) benefit	(15.6)	(11.9)	140.5	(42.3)
Earnings in equity of subsidiaries	(1.0)	1.6	2.2	3.4
Net income	26.1	21.3	(235.4)	73.6
Comprehensive income	26.5	22.5	(167.8)	77.7
Non-Guarantor Subsidiaries
CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME
Net sales	29.4	33.6	97.6	100.7
Cost of products sold:
Cost of products sold, excluding depreciation and amortization and other items	25.3	29.8	85.8	87.9
Unrealized losses on derivative instruments	0.0	0.0	0.0	0.0
Depreciation and amortization	0.3	0.3	0.9	0.8
Selling, general, administrative, research and development	2.4	1.7	7.2	7.9
Net periodic postretirement benefit cost relating to Salaried VEBA	0.0	0.0	0.0	0.0
Gain on removal of Union VEBA net assets	0.0		0.0
Total selling, general, administrative, research and development	2.4	1.7	7.2	7.9
Total costs and expenses	28.0	31.8	93.9	96.6
Other operating charges, net		0.0		0.0
Operating (loss) income	1.4	1.8	3.7	4.1
Other (expense) income:
Interest expense	0.0	0.0	0.0	0.0
Other income (expense), net	(2.4)	(0.1)	(2.2)	0.4
(Loss) income before income taxes	(1.0)	1.7	1.5	4.5
Income tax (provision) benefit	0.8	(0.1)	2.2	(0.9)
Earnings in equity of subsidiaries	0.0	0.0	0.0	0.0
Net income	(0.2)	1.6	3.7	3.6
Comprehensive income	(0.5)	1.7	3.5	3.8
Consolidating Adjustments
CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME
Net sales	(22.5)	(25.0)	(73.5)	(75.7)
Cost of products sold:
Cost of products sold, excluding depreciation and amortization and other items	(21.1)	(24.1)	(70.3)	(73.5)
Unrealized losses on derivative instruments	0.0	0.0	0.0	0.0
Depreciation and amortization	0.0	0.0	0.0	0.0
Selling, general, administrative, research and development	(0.6)	(0.8)	(1.7)	(2.0)
Net periodic postretirement benefit cost relating to Salaried VEBA	0.0	0.0	0.0	0.0
Gain on removal of Union VEBA net assets	0.0		0.0
Total selling, general, administrative, research and development	(0.6)	(0.8)	(1.7)	(2.0)
Total costs and expenses	(21.7)	(24.9)	(72.0)	(75.5)
Other operating charges, net		0.0		0.0
Operating (loss) income	(0.8)	(0.1)	(1.5)	(0.2)
Other (expense) income:
Interest expense	0.1	0.2	0.3	0.4
Other income (expense), net	(0.1)	(0.2)	(0.3)	(0.4)
(Loss) income before income taxes	(0.8)	(0.1)	(1.5)	(0.2)
Income tax (provision) benefit	2.2	2.8	8.5	10.1
Earnings in equity of subsidiaries	(27.3)	(25.6)	224.7	(87.1)
Net income	(25.9)	(22.9)	231.7	(77.2)
Comprehensive income	$ (26.0)	$ (24.2)	$ 164.3	$ (81.5)

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Fair Value Measurements Fair Value Measurements, Textual (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Debt Instrument, Fair Value Disclosure [Abstract]
Derivative Asset	$ 0.3	$ 85.7
Minimum
Schedule of Available-for-sale Securities [Line Items]
Short-term investment maturity period	5 months
Maximum
Schedule of Available-for-sale Securities [Line Items]
Short-term investment maturity period	7 months
Derivative
Debt Instrument, Fair Value Disclosure [Abstract]
Fair Value, Net Asset (Liability)	$ (19.0)	$ (11.1)

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Guarantor and Non-Guarantor Financial Statements, Textuals (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	May. 23, 2012
Condensed Financial Statements, Captions
Long-term debt	$ 218.9	$ 225.0
Ownership interest by parent	100.00%
Senior Notes
Condensed Financial Statements, Captions
Principal amount of notes			$ 225.0
Long-term debt	$ 218.9

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Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2015

Accounting Policies [Abstract]

Organization and Nature of Operations

Organization and Nature of Operations. Kaiser Aluminum Corporation specializes in the production of semi-fabricated specialty aluminum products, such as aluminum sheet and plate and extruded and drawn products, primarily used in aerospace/high strength, automotive, general engineering and other industrial end market applications. Our business is organized into one operating segment, Fabricated Products. See Note 11 for additional information regarding our reportable segment and business unit.

Principles of Consolidation and Basis of Presentation

Principles of Consolidation and Basis of Presentation. The accompanying unaudited consolidated financial statements include the accounts of our wholly owned subsidiaries and are prepared in accordance with United States generally accepted accounting principles ("GAAP") and the rules and regulations of the Securities and Exchange Commission ("SEC") applicable for interim periods and, therefore, do not include all information and footnotes required by GAAP for complete financial statements. In management’s opinion, all adjustments (which include normal recurring adjustments) considered necessary for a fair presentation have been included. The results of operations for our interim periods are not necessarily indicative of the results of operations that may be achieved for the entire 2015 fiscal year. The financial information as of December 31, 2014 is derived from our audited consolidated financial statements and footnotes for the year ended December 31, 2014 included in our Annual Report on Form 10-K.

Use of Estimates in the Preparation of Financial Statements

Use of Estimates in the Preparation of Financial Statements. The preparation of financial statements in accordance with GAAP requires the use of estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities known to exist as of the date the financial statements are published and the reported amounts of revenues and expenses during the reporting period. Uncertainties with respect to such estimates and assumptions are inherent in the preparation of our consolidated financial statements; accordingly, it is possible that the actual results could differ from these estimates and assumptions, which could have a material effect on the reported amounts of our consolidated financial position and results of operations.

Inventories

Inventories. Inventories are stated at the lower of cost or market value. Finished products, work-in-process and raw material inventories are stated on the last-in, first-out ("LIFO") basis. The (shortfalls) excesses of current cost over the stated LIFO value of inventory at September 30, 2015 and December 31, 2014 was $(13.4) million and $37.6 million, respectively. The net realizable value of our inventory was approximately the stated LIFO value as of September 30, 2015. Other inventories, principally operating supplies and repair and maintenance parts, are stated at average cost. Inventory costs consist of material, labor and manufacturing overhead, including depreciation. Abnormal costs, such as idle facility expenses, freight, handling costs and spoilage, are accounted for as current period charges. All of our inventories at September 30, 2015 and December 31, 2014 were included in the Fabricated Products segment (see Note 2 for the components of inventories).

Property, Plant and Equipment - Net

Property, Plant and Equipment – Net. Property, plant and equipment is recorded at cost (see Note 2). Construction in progress is included within Property, plant and equipment – net on the Consolidated Balance Sheets. Interest related to the construction of qualifying assets is capitalized as part of the construction costs. The aggregate amount of interest capitalized is limited to the interest expense incurred in the period. The amount of interest expense capitalized as construction in progress was $0.4 million and $0.3 million during the quarters ended September 30, 2015 and September 30, 2014, respectively. The amount of interest expense capitalized as construction in progress was $1.1 million and $2.2 million during the nine months endedSeptember 30, 2015 and September 30, 2014, respectively.

We recorded impairment charges of $1.3 million and $1.5 million during the quarter and nine months ended September 30, 2014, respectively, to reflect the scrap value of idled assets we determined not to deploy for future use. Asset impairment charges are included in Other operating charges, net, in the Statements of Consolidated Income and are included in the Fabricated Products segment.

Depreciation is computed using the straight-line method at rates based on the estimated useful lives of the various classes of assets. Capital lease assets and leasehold improvements are depreciated on a straight-line basis over the shorter of the estimated useful lives of the assets or the lease term. Depreciation expense is not included in Cost of products sold, excluding depreciation and amortization and other items, but is included in Depreciation and amortization on the Statements of Consolidated Income. For the quarters ended September 30, 2015 and September 30, 2014, we recorded depreciation expense of $7.5 million and $7.4 million, respectively, relating to our operating facilities in the Fabricated Products segment. For the nine months endedSeptember 30, 2015 and September 30, 2014, we recorded depreciation expense of $22.6 million and $21.5 million, respectively, relating to our operating facilities in the Fabricated Products segment. An immaterial amount of depreciation expense was also recorded within All Other for all periods presented in this Report.

We classify assets as held for sale only when an asset is being actively marketed and expected to sell within 12 months. Assets held for sale are initially measured at the lesser of the assets’ carrying amount and the fair value less costs to sell.

Concentration of Labor Subject to Collective Bargaining Agreements [Policy Text Block]

Concentration of Labor Subject to Collective Bargaining Agreements. At September 30, 2015, approximately 63% of our employees were covered by collective bargaining agreements and 5% of our employees were covered by collective bargaining agreements with expiration dates occurring within one year from September 30, 2015.

Dividends policy [Policy Text Block]

Dividends. When we expect to be in a capital surplus position by the end of a fiscal year, cash dividends and dividend equivalents paid are charged against (Accumulated deficit) retained earnings; otherwise, dividends and dividend equivalents paid are charged against Additional paid in capital.

Derivatives, Policy [Policy Text Block]

Foreign Currency Risk Management. From time to time, we enter into foreign currency forward contracts to protect the value of anticipated foreign currency expenses associated with cash commitments for equipment purchases. These derivative instruments are designated and qualify for cash flow hedge accounting and are adjusted to current market values each reporting period. Both realized and unrealized periodic gains and losses of derivative instruments designated as cash flow hedges are deferred in Accumulated other comprehensive loss until depreciation on the underlying equipment commences. Upon commencement, realized gains and losses are recorded in Net income (loss) as an adjustment to depreciation expense in the period in which depreciation is recognized on the underlying equipment. Depending on the time to maturity and asset or liability position, the carrying values of cash flow hedges are included in Prepaid expenses and other current assets, Other assets, Other accrued liabilities or Long-term liabilities.

Our policy requires that derivative instruments used as hedges must be effective at reducing the risk associated with the exposure being hedged and must be designated as a hedge at the inception of the instrument contract. Hedge effectiveness is assessed periodically. Any derivative instrument not designated as a hedge, or so designated but ineffective, is adjusted to market value and recognized in net income immediately. If a cash flow hedge ceases to qualify for hedge accounting treatment or is terminated, the derivative instrument would continue to be carried on the balance sheet at fair value until settled and future adjustments to the derivative instrument’s fair value would be recognized in earnings immediately. If a forecasted equipment purchase was no longer probable to occur, amounts previously deferred in accumulated other comprehensive income would be recognized immediately in earnings. See Note 8 for additional information.

We are exposed to counterparty credit risk on all of our derivative instruments. Accordingly, we have established and maintained strict counterparty credit guidelines and entered into hedges only with major financial institutions that are investment grade or better. We do not have significant exposure to any one counterparty and management believes the risk of loss is remote and in any event would not be material. Additionally, we do not require collateral under these agreements.

New Accounting Pronouncements

New Accounting Pronouncements. Accounting Standards Update ("ASU") No. 2014-12, Compensation - Stock Compensation (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period - Consensus of the FASB Emerging Issues Task Force("ASU 2014-12"), was issued in June 2014. ASU 2014-12 requires an entity to treat a performance target that affects vesting and that could be achieved after the requisite service period as a performance condition. Our adoption of this ASU in the first quarter of 2015 did not have a material impact on our consolidated financial statements.

ASU No. 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs("ASU 2015-03"), was issued in April 2015. ASU 2015-03 requires debt issuance costs related to a recognized debt liability to be presented in an entity’s balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts, instead of being presented as a deferred charge in the balance sheet. In August 2015, ASU No. 2015-15, Interest - Imputation of Interest (Subtopic 835-30) - Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements ("ASU 2015-15") was issued to address the presentation and subsequent measurement of debt issuance costs related to line-of-credit arrangements. The recognition and measurement guidance for debt issuance costs is not affected by ASU 2015-03 and ASU 2015-15. An entity is required to adopt ASU 2015-03 and ASU 2015-15 for reporting periods beginning on or after December 15, 2015. We do not expect the adoption of these ASUs to have a material impact on our consolidated financial statements.

ASU No. 2015-05, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement("ASU 2015-05"), was issued in April 2015. The ASU requires companies to perform the same assessment that vendors currently perform under ASC 985-605; that is, companies must determine whether an arrangement with its vendor contains a software license element. If so, the related fees paid are accounted for as an internal-use software intangible under ASC 350-40; if not, the arrangement is accounted for as a service contract. As a result of the issuance of ASU 2015-05, all software licenses within the scope of Subtopic 350-40 will be accounted for consistent with other licenses of intangible assets. An entity is required to adopt ASU 2015-05 for reporting periods beginning on or after December 15, 2015. We do not expect the adoption of this ASU to have a material impact on our consolidated financial statements.

ASU No. 2015-07, Fair Value Measurement (Topic 820): Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent) ("ASU 2015-07"), was issued in May 2015. This ASU removes the requirement to categorize within the fair value hierarchy table investments without readily determinable fair values in entities that elect to measure fair value using net asset value per share ("NAV") or its equivalent. ASU 2015-07 requires that these investments continue to be shown in the fair value disclosure in order to allow the disclosure to reconcile to the investment amount presented in the balance sheet. We expect to early adopt ASU 2015-07 in the quarter ending December 31, 2015 with retrospective application. We expect to modify our presentation of assets valued using NAV in the voluntary employees’ beneficiary association ("VEBA") postretirement benefit plan and Canadian Pension Plan section of our fair value hierarchy table when we adopt ASU 2015-07.

ASU No. 2015-14, Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date ("ASU 2015-14"), was issued in August 2015. ASU 2015-14 defers the effective date of ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), which was issued in May 2014 and requires an entity to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services, by one year for all entities and permits early adoption on a limited basis. We expect to adopt ASU 2014-09 for the fiscal year ending December 31, 2018 and will continue to assess the impact of the adoption on our consolidated financial statements.

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Employee Incentive Plans Employee Incentive Plans, Vested Stock (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Issuance of common shares to non-employee directors	$ 0.2	$ 0.2
Common shares withheld and canceled	35,081	33,696

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Long-Term Debt and Credit Facility, Textuals (Details) - USD ($) $ / shares in Units, shares in Millions				1 Months Ended	3 Months Ended			9 Months Ended
	Jul. 01, 2015	Apr. 01, 2015	May. 23, 2012	Oct. 19, 2015	Sep. 30, 2015	Mar. 31, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Mar. 29, 2010
Long-term debt
Repayments of Unsecured Debt								$ 6,100,000	$ 0
Long-term debt					$ 218,900,000			218,900,000		$ 225,000,000
Debt Instrument, Unamortized Discount										2,500,000
Derivative Asset					$ 300,000			$ 300,000		$ 85,700,000
Payment of quarterly cash dividends								$ 1.20	$ 1.05
Warrant Transactions
Long-term debt
Common stock sold related to option counterparties net-share-settled warrants					1.7		3.7	1.7	3.7	3.7
Trading days warrants are exercisable	120 days
Exercise price per share of Warrants					$ 60.32		$ 60.80	$ 60.32	$ 60.80
Senior Notes
Long-term debt
Principal amount of notes			$ 225,000,000
Interest rate			8.25%
Percentage of principal amount issued			100.00%
Interest expense including amortization of deferred financing costs					$ 4,800,000		$ 4,800,000	$ 14,500,000	$ 14,500,000
Repayments of Unsecured Debt					6,100,000
Loss on Repurchase of Debt Instrument					600,000
Long-term debt					218,900,000			218,900,000
Revolving Credit Facility
Line of Credit Facility
Maximum borrowing capacity					300,000,000			300,000,000
Available borrowing capacity					246,500,000			246,500,000
Remaining available borrowing capacity					$ 239,100,000			$ 239,100,000
Interest on Revolving Credit Facility					4.00%			4.00%
Line of Credit
Line of Credit Facility
Outstanding line of credit					$ 0			$ 0
Letter of Credit
Line of Credit Facility
Outstanding line of credit					$ 7,400,000			$ 7,400,000
Minimum
Long-term debt
Payment of quarterly cash dividends					$ 0.24
Convertible Debt
Long-term debt
Principal amount of notes											$ 175,000,000
Interest rate											4.50%
Debt Instrument, Redemption Price, Percentage						154.261%
Consecutive trading days threshold for conversion						50 days
Short-term Debt, Fair Value		$ 273,800,000
Debt Instrument, Final Interest Payment		3,900,000
Principal amount in conversion feature		175,000,000
Debt Instrument, Convertible, If-converted Value in Excess of Principal		94,900,000
Derivative Asset		94,900,000
Net cash outflow in convertible debt settlement		$ 178,900,000
Subsequent Event | Senior Notes
Long-term debt
Repayments of Unsecured Debt				$ 21,100,000
Percentage of principal amount repurchased				107.50%

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Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended	3 Months Ended		9 Months Ended
	Oct. 13, 2015	Oct. 19, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Oct. 21, 2015
Subsequent Event [Line Items]
Common Stock, Dividends, Per Share, Declared			$ 0.40	$ 0.35	$ 1.20	$ 1.05
Repayments of Unsecured Debt					$ 6.1	$ 0.0
Subsequent Event
Subsequent Event [Line Items]
Common Stock, Dividends, Per Share, Declared	$ 0.40
Cash dividends declared	$ 7.1
Subsequent Event | Warrant Transactions
Subsequent Event [Line Items]
Exercise price per share of Warrants		$ 60.32					$ 60.20
Warrant Transactions | Subsequent Event
Subsequent Event [Line Items]
Issuance of stock warrants		102,555
Shares owed and pending settlement		8,200
Senior Notes
Subsequent Event [Line Items]
Repayments of Unsecured Debt			$ 6.1
Senior Notes | Subsequent Event
Subsequent Event [Line Items]
Percentage of principal amount repurchased		107.50%
Repayments of Unsecured Debt		$ 21.1

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Other Comprehensive Income (Tables)

9 Months Ended

Sep. 30, 2015

Statement of Comprehensive Income [Abstract]

Other Comprehensive Income

The following table presents the tax effect allocated to each component of other comprehensive income (loss) for each period presented (in millions of dollars):

	Before-Tax			Income Tax			Net-of-Tax
	Amount			(Expense) Benefit4			Amount
Quarter Ended September 30, 2015
Salaried VEBA:
Reclassification adjustments:
Amortization of net actuarial loss1	$	0.3		$	(0.1	)	$	0.2
Amortization of prior service cost1	0.7			(0.2		)	0.5
Other comprehensive income relating to Salaried VEBA	1.0			(0.3		)	0.7
Available for sale securities:
Unrealized loss on available for sale securities	(0.4		)	0.1			(0.3		)
Reclassification adjustments:
Reclassification of unrealized gain upon sale of available for sale securities3	(0.1		)	0.1			—
Other comprehensive loss relating to available for sale securities	(0.5		)	0.2			(0.3		)
Foreign currency translation loss	(0.3		)	—			(0.3		)
Other comprehensive income	$	0.2		$	(0.1	)	$	0.1
Quarter Ended September 30, 2014
VEBAs:
Reclassification adjustments:
Amortization of net actuarial gain2	$	(0.5	)	$	0.2		$	(0.3	)
Amortization of prior service cost2	2.6			(1.0		)	1.6
Other comprehensive income relating to VEBAs	2.1			(0.8		)	1.3
Unrealized loss on available for sale securities	(0.2		)	0.1			(0.1		)
Foreign currency translation gain	0.1			—			0.1
Other comprehensive income	$	2.0		$	(0.7	)	$	1.3

	Before-Tax			Income Tax			Net-of-Tax
	Amount			(Expense) Benefit4			Amount
Nine Months Ended September 30, 2015
VEBAs:
Reclassification adjustments:
Amortization of net actuarial loss1	$	0.8		$	(0.3	)	$	0.5
Amortization of prior service cost1	2.2			(0.8		)	1.4
Removal of obligation relating to Union VEBA	106.6			(40.4		)	66.2
Other comprehensive income relating to VEBAs	109.6			(41.5		)	68.1
Available for sale securities:
Unrealized loss on available for sale securities	(0.7		)	0.2			(0.5		)
Reclassification adjustments:
Reclassification of unrealized loss upon sale of available for sale securities3	0.1			—			0.1
Other comprehensive loss relating to available for sale securities	(0.6		)	0.2			(0.4		)
Unrealized loss on foreign currency cash flow hedges	(0.2		)	0.1			(0.1		)
Foreign currency translation loss	(0.2		)	—			(0.2		)
Other comprehensive income	$	108.6		$	(41.2	)	$	67.4
Nine Months Ended September 30, 2014
VEBAs:
Reclassification adjustments:
Amortization of net actuarial (gain)2	$	(1.4	)	$	0.5		$	(0.9	)
Amortization of prior service cost2	8.0			(3.0		)	5.0
Other comprehensive income relating to VEBAs	6.6			(2.5		)	4.1
Available for sale securities:
Unrealized gain on available for sale securities	0.1			—			0.1
Reclassification adjustments:
Reclassification of unrealized gain upon sale of available for sale securities3	(0.2		)	0.1			(0.1		)
Other comprehensive loss relating to available for sale securities	(0.1		)	0.1			—
Foreign currency translation gain	0.2			—			0.2
Other comprehensive income	$	6.7		$	(2.4	)	$	4.3

________________

¹  Amounts reclassified out of Accumulated other comprehensive loss relating to VEBA adjustments were included as a component of Net periodic postretirement benefit cost (income) relating to the Salaried VEBA.

²  Amounts reclassified out of Accumulated other comprehensive loss relating to VEBA adjustments were included as a component of Net periodic postretirement benefit cost (income) relating to both VEBAs.

³  Amounts reclassified out of Accumulated other comprehensive loss relating to sales of available for sale securities were included as a component of Other (expense) income, net. We use the specific identification method to determine the amount reclassified out of Accumulated other comprehensive loss.

⁴  Income tax amounts reclassified out of Accumulated other comprehensive loss were included as a component of Income tax (provision) benefit.

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Commitments and Contingencies, Environmental (Details) $ in Millions	9 Months Ended
	Sep. 30, 2015 USD ($)
Environmental Contingency
Environmental accrual	$ 18.8
Expected period related to remediation expenditures for environmental contingencies period	30 years
Potential increase in environmental costs	$ 24.7
Minimum
Environmental Contingency
Period for final feasibility study	18 months
Maximum
Environmental Contingency
Period for final feasibility study	24 months

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Segment Information, Supply Information (Details) - Supplier Concentration Risk - Aluminum	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Top five major suppliers
Concentration Risk
Concentration Risk, Percentage	84.00%	82.00%	86.00%	79.00%
Largest supplier
Concentration Risk
Concentration Risk, Percentage	28.00%	31.00%	28.00%	30.00%
Second and third largest suppliers
Concentration Risk
Concentration Risk, Percentage	45.00%	34.00%	36.00%	32.00%

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Earnings Per Share, Calculation of EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Numerator:
Net loss	$ 22.1	$ 15.9	$ (249.9)	$ 56.2
Denominator — Weighted-average common shares outstanding (in thousands):
Basic	17,123	17,707	17,178	17,853
Add: dilutive effect of non-vested common shares, restricted stock units and performance shares	305	134	0	143
Add: dilutive effect of warrants	744	778	0	596
Diluted	18,172	18,619	17,178	18,592
Net income (loss) per common share:
Basic	$ 1.29	$ 0.90	$ (14.55)	$ 3.15
Earnings per common share, Diluted:
Diluted	$ 1.21	$ 0.85	$ (14.55)	$ 3.02

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Employee Benefits, Net Periodic Benefit Costs and Charges Relating To All Other Employee Benefit Plans(Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
VEBAs:
Total net periodic postretirement benefit cost (income) relating to VEBAs	$ 0.6	$ (6.0)	$ 1.8	$ (17.7)
Deferred Compensation Arrangement with Individual, Compensation Expense	(0.4)	0.0	0.1	0.6
Defined contribution plans	1.4	1.3	7.1	6.8
Multiemployer pension plans	1.1	0.8	2.9	2.6
Charges Relating To Other Benefit Plans	2.1	2.1	10.1	10.0
Total other employee benefit plans	(0.2)	(3.9)	502.8	(7.7)
Fabricated Products
VEBAs:
Total other employee benefit plans	2.4	2.0	9.4	8.9
All Other
VEBAs:
Total other employee benefit plans	(2.6)	(5.9)	493.4	(16.6)
VEBAs
VEBAs:
Service cost1	0.0	0.6	0.0	1.7
Interest cost	0.7	4.2	2.1	12.5
Expected return on plan assets	(1.1)	(12.9)	(3.3)	(38.5)
Amortization of prior service cost	0.7	2.6	2.2	8.0
Amortization of net actuarial loss (gain)	0.3	(0.5)	0.8	(1.4)
Total net periodic postretirement benefit cost (income) relating to VEBAs	0.6	(6.0)	1.8	(17.7)
Pre-tax loss on settlement of Union VEBA	(2.9)	0.0	490.9	0.0
Total Charges Relating To VEBAs	$ (2.3)	$ (6.0)	$ 492.7	$ (17.7)

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Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2015

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

This Quarterly Report on Form 10-Q (this "Report") should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2014. Unless the context otherwise requires, references in these notes to interim consolidated financial statements - unaudited to "Kaiser Aluminum Corporation," "we," "us," "our," "the Company" and "our Company" refer to Kaiser Aluminum Corporation and its consolidated subsidiaries.

Organization and Nature of Operations. Kaiser Aluminum Corporation specializes in the production of semi-fabricated specialty aluminum products, such as aluminum sheet and plate and extruded and drawn products, primarily used in aerospace/high strength, automotive, general engineering and other industrial end market applications. Our business is organized into one operating segment, Fabricated Products. See Note 11 for additional information regarding our reportable segment and business unit.

Principles of Consolidation and Basis of Presentation. The accompanying unaudited consolidated financial statements include the accounts of our wholly owned subsidiaries and are prepared in accordance with United States generally accepted accounting principles ("GAAP") and the rules and regulations of the Securities and Exchange Commission ("SEC") applicable for interim periods and, therefore, do not include all information and footnotes required by GAAP for complete financial statements. In management’s opinion, all adjustments (which include normal recurring adjustments) considered necessary for a fair presentation have been included. The results of operations for our interim periods are not necessarily indicative of the results of operations that may be achieved for the entire 2015 fiscal year. The financial information as of December 31, 2014 is derived from our audited consolidated financial statements and footnotes for the year ended December 31, 2014 included in our Annual Report on Form 10-K.

Use of Estimates in the Preparation of Financial Statements. The preparation of financial statements in accordance with GAAP requires the use of estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities known to exist as of the date the financial statements are published and the reported amounts of revenues and expenses during the reporting period. Uncertainties with respect to such estimates and assumptions are inherent in the preparation of our consolidated financial statements; accordingly, it is possible that the actual results could differ from these estimates and assumptions, which could have a material effect on the reported amounts of our consolidated financial position and results of operations.

Inventories. Inventories are stated at the lower of cost or market value. Finished products, work-in-process and raw material inventories are stated on the last-in, first-out ("LIFO") basis. The (shortfalls) excesses of current cost over the stated LIFO value of inventory at September 30, 2015 and December 31, 2014 was $(13.4) million and $37.6 million, respectively. The net realizable value of our inventory was approximately the stated LIFO value as of September 30, 2015. Other inventories, principally operating supplies and repair and maintenance parts, are stated at average cost. Inventory costs consist of material, labor and manufacturing overhead, including depreciation. Abnormal costs, such as idle facility expenses, freight, handling costs and spoilage, are accounted for as current period charges. All of our inventories at September 30, 2015 and December 31, 2014 were included in the Fabricated Products segment (see Note 2 for the components of inventories).

Property, Plant and Equipment – Net. Property, plant and equipment is recorded at cost (see Note 2). Construction in progress is included within Property, plant and equipment – net on the Consolidated Balance Sheets. Interest related to the construction of qualifying assets is capitalized as part of the construction costs. The aggregate amount of interest capitalized is limited to the interest expense incurred in the period. The amount of interest expense capitalized as construction in progress was $0.4 million and $0.3 million during the quarters ended September 30, 2015 and September 30, 2014, respectively. The amount of interest expense capitalized as construction in progress was $1.1 million and $2.2 million during the nine months endedSeptember 30, 2015 and September 30, 2014, respectively.

We recorded impairment charges of $1.3 million and $1.5 million during the quarter and nine months ended September 30, 2014, respectively, to reflect the scrap value of idled assets we determined not to deploy for future use. Asset impairment charges are included in Other operating charges, net, in the Statements of Consolidated Income and are included in the Fabricated Products segment.

Depreciation is computed using the straight-line method at rates based on the estimated useful lives of the various classes of assets. Capital lease assets and leasehold improvements are depreciated on a straight-line basis over the shorter of the estimated useful lives of the assets or the lease term. Depreciation expense is not included in Cost of products sold, excluding depreciation and amortization and other items, but is included in Depreciation and amortization on the Statements of Consolidated Income. For the quarters ended September 30, 2015 and September 30, 2014, we recorded depreciation expense of $7.5 million and $7.4 million, respectively, relating to our operating facilities in the Fabricated Products segment. For the nine months endedSeptember 30, 2015 and September 30, 2014, we recorded depreciation expense of $22.6 million and $21.5 million, respectively, relating to our operating facilities in the Fabricated Products segment. An immaterial amount of depreciation expense was also recorded within All Other for all periods presented in this Report.

We classify assets as held for sale only when an asset is being actively marketed and expected to sell within 12 months. Assets held for sale are initially measured at the lesser of the assets’ carrying amount and the fair value less costs to sell.

Concentration of Labor Subject to Collective Bargaining Agreements. At September 30, 2015, approximately 63% of our employees were covered by collective bargaining agreements and 5% of our employees were covered by collective bargaining agreements with expiration dates occurring within one year from September 30, 2015.

Dividends. When we expect to be in a capital surplus position by the end of a fiscal year, cash dividends and dividend equivalents paid are charged against (Accumulated deficit) retained earnings; otherwise, dividends and dividend equivalents paid are charged against Additional paid in capital.

Foreign Currency Risk Management. From time to time, we enter into foreign currency forward contracts to protect the value of anticipated foreign currency expenses associated with cash commitments for equipment purchases. These derivative instruments are designated and qualify for cash flow hedge accounting and are adjusted to current market values each reporting period. Both realized and unrealized periodic gains and losses of derivative instruments designated as cash flow hedges are deferred in Accumulated other comprehensive loss until depreciation on the underlying equipment commences. Upon commencement, realized gains and losses are recorded in Net income (loss) as an adjustment to depreciation expense in the period in which depreciation is recognized on the underlying equipment. Depending on the time to maturity and asset or liability position, the carrying values of cash flow hedges are included in Prepaid expenses and other current assets, Other assets, Other accrued liabilities or Long-term liabilities.

Our policy requires that derivative instruments used as hedges must be effective at reducing the risk associated with the exposure being hedged and must be designated as a hedge at the inception of the instrument contract. Hedge effectiveness is assessed periodically. Any derivative instrument not designated as a hedge, or so designated but ineffective, is adjusted to market value and recognized in net income immediately. If a cash flow hedge ceases to qualify for hedge accounting treatment or is terminated, the derivative instrument would continue to be carried on the balance sheet at fair value until settled and future adjustments to the derivative instrument’s fair value would be recognized in earnings immediately. If a forecasted equipment purchase was no longer probable to occur, amounts previously deferred in accumulated other comprehensive income would be recognized immediately in earnings. See Note 8 for additional information.

We are exposed to counterparty credit risk on all of our derivative instruments. Accordingly, we have established and maintained strict counterparty credit guidelines and entered into hedges only with major financial institutions that are investment grade or better. We do not have significant exposure to any one counterparty and management believes the risk of loss is remote and in any event would not be material. Additionally, we do not require collateral under these agreements.

New Accounting Pronouncements. Accounting Standards Update ("ASU") No. 2014-12, Compensation - Stock Compensation (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period - Consensus of the FASB Emerging Issues Task Force("ASU 2014-12"), was issued in June 2014. ASU 2014-12 requires an entity to treat a performance target that affects vesting and that could be achieved after the requisite service period as a performance condition. Our adoption of this ASU in the first quarter of 2015 did not have a material impact on our consolidated financial statements.

ASU No. 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs("ASU 2015-03"), was issued in April 2015. ASU 2015-03 requires debt issuance costs related to a recognized debt liability to be presented in an entity’s balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts, instead of being presented as a deferred charge in the balance sheet. In August 2015, ASU No. 2015-15, Interest - Imputation of Interest (Subtopic 835-30) - Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements ("ASU 2015-15") was issued to address the presentation and subsequent measurement of debt issuance costs related to line-of-credit arrangements. The recognition and measurement guidance for debt issuance costs is not affected by ASU 2015-03 and ASU 2015-15. An entity is required to adopt ASU 2015-03 and ASU 2015-15 for reporting periods beginning on or after December 15, 2015. We do not expect the adoption of these ASUs to have a material impact on our consolidated financial statements.

ASU No. 2015-05, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement("ASU 2015-05"), was issued in April 2015. The ASU requires companies to perform the same assessment that vendors currently perform under ASC 985-605; that is, companies must determine whether an arrangement with its vendor contains a software license element. If so, the related fees paid are accounted for as an internal-use software intangible under ASC 350-40; if not, the arrangement is accounted for as a service contract. As a result of the issuance of ASU 2015-05, all software licenses within the scope of Subtopic 350-40 will be accounted for consistent with other licenses of intangible assets. An entity is required to adopt ASU 2015-05 for reporting periods beginning on or after December 15, 2015. We do not expect the adoption of this ASU to have a material impact on our consolidated financial statements.

ASU No. 2015-07, Fair Value Measurement (Topic 820): Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent) ("ASU 2015-07"), was issued in May 2015. This ASU removes the requirement to categorize within the fair value hierarchy table investments without readily determinable fair values in entities that elect to measure fair value using net asset value per share ("NAV") or its equivalent. ASU 2015-07 requires that these investments continue to be shown in the fair value disclosure in order to allow the disclosure to reconcile to the investment amount presented in the balance sheet. We expect to early adopt ASU 2015-07 in the quarter ending December 31, 2015 with retrospective application. We expect to modify our presentation of assets valued using NAV in the voluntary employees’ beneficiary association ("VEBA") postretirement benefit plan and Canadian Pension Plan section of our fair value hierarchy table when we adopt ASU 2015-07.

ASU No. 2015-14, Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date ("ASU 2015-14"), was issued in August 2015. ASU 2015-14 defers the effective date of ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), which was issued in May 2014 and requires an entity to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services, by one year for all entities and permits early adoption on a limited basis. We expect to adopt ASU 2014-09 for the fiscal year ending December 31, 2018 and will continue to assess the impact of the adoption on our consolidated financial statements.

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Earnings Per Share, Textuals (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		9 Months Ended
	Jul. 01, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Potential dilutive effect of options and Warrants
Add: dilutive effect of warrants		744,000	778,000	0	596,000
Dividends
Cash dividends paid				$ 21.0	$ 19.1
Cash dividends paid per share				$ 1.20	$ 1.05
Treasury Stock, Number of Shares and Restriction Disclosures [Abstract]
Repurchase of common stock				599,397	410,589
Weighted-average price per share of common stock repurchased				$ 75.81	$ 70.34
Repurchase of common stock, total cost		$ 45.4		$ 45.4	$ 28.9
Common share amount available for additional share repurchase		$ 127.3		$ 127.3
Warrant Transactions
Potential dilutive effect of options and Warrants
Number of common shares underlying the Warrants outstanding		1,700,000	3,700,000	1,700,000	3,700,000	3,700,000
End of period incremental shares potentially issuable related to warrant exercises		473,850		473,850
Average exercise price of common shares underlying Warrants		$ 60.32	$ 60.80	$ 60.32	$ 60.80
Trading days warrants are exercisable	120 days
Issuance of stock warrants				516,220
Warrants exercised		2,000,000
Warrants [Member]
Potential dilutive effect of options and Warrants
Add: dilutive effect of warrants			778,147

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Long-Term Debt and Credit Facility, Carrying Amount Table (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Debt Instrument [Line Items]
Carrying amount, net of discount					$ 172.5
Convertible Debt
Debt Instrument [Line Items]
Contractual coupon interest	$ 0.0	$ 2.0	$ 2.0	$ 5.9
Amortization of discount	0.0	2.3	2.4	6.7
Amortization of deferred financing costs	0.0	0.3	0.3	0.9
Total interest expense	$ 0.0	$ 4.6	$ 4.7	$ 13.5

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Employee Benefits (Tables)

9 Months Ended

Sep. 30, 2015

Compensation and Retirement Disclosure [Abstract]

Schedule of (Income) Charges Related to Benefit Plans

The following table presents the components of net periodic postretirement benefit cost (income) for the VEBAs and charges relating to all other employee benefit plans for the periods presented (in millions of dollars):

	Quarter Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
VEBAs:
Service cost1	$	—		$	0.6		$	—		$	1.7
Interest cost	0.7			4.2			2.1			12.5
Expected return on plan assets	(1.1		)	(12.9		)	(3.3		)	(38.5		)
Amortization of prior service cost	0.7			2.6			2.2			8.0
Amortization of net actuarial loss (gain)	0.3			(0.5		)	0.8			(1.4		)
Total net periodic postretirement benefit cost (income) relating to VEBAs	0.6			(6.0		)	1.8			(17.7		)
(Gain) loss on removal of Union VEBA net assets2	(2.9		)	—			490.9			—
Total VEBAs	(2.3		)	(6.0		)	492.7			(17.7		)
Other employee benefit plans:
Deferred compensation plan	(0.4		)	—			0.1			0.6
Defined contribution plans	1.4			1.3			7.1			6.8
Multiemployer pension plans	1.1			0.8			2.9			2.6
Total other employee benefit plans	$	2.1		$	2.1		$	10.1		$	10.0
Total	$	(0.2	)	$	(3.9	)	$	502.8		$	(7.7	)

____________

¹  The service cost related to the Salaried VEBA was insignificant for all periods presented.

²  Includes a $2.9 million adjustment during the quarter ended September 30, 2015 to decrease our contingent contribution accrual related to the Union VEBA settlement.

The following table presents the allocation of the charges (income) detailed above, by reportable segment and business unit (in millions of dollars – see Note 11):

	Quarter Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015		2014
Fabricated Products	$	2.4		$	2.0		$	9.4	$	8.9
All Other	(2.6		)	(5.9		)	493.4		(16.6		)
Total	$	(0.2	)	$	(3.9	)	$	502.8	$	(7.7	)

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Income Tax Matters (Tables)

9 Months Ended

Sep. 30, 2015

Income Tax Disclosure [Abstract]

Tax Provision

The provision for (benefit from) incomes taxes for each period presented consisted of the following (in millions of dollars):

	Quarter Ended					Nine Months Ended
	September 30,					September 30,
	2015			2014		2015			2014
Domestic	$	13.4		$	9.2	$	(149.0	)	$	32.2
Foreign	(0.8		)	—		(2.2		)	0.9
Total	$	12.6		$	9.2	$	(151.2	)	$	33.1

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Derivative Financial Instruments and Related Hedging Programs, Offsetting of Derivative Instruments by Counterparty (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Derivative Assets and Collateral Held by Counterparty
Gross Amounts of Recognized Assets	$ 0.3	$ 85.7
Gross Amounts Offset in the Consolidated Balance Sheets	0.0	0.0
Net Amounts of Assets Presented in the Consolidated Balance Sheets	0.3	85.7
Gross Amounts Not Offset in the Consolidated Balance Sheets - Financial Instruments	0.3	0.8
Gross Amounts Not Offset in the Consolidated Balance Sheets - Cash Collateral Received	0.0	0.0
Net Amount	0.0	84.9
Derivative Liabilities and Collateral Held by Counterparty
Gross Amounts of Recognized Liabilities	(19.3)	(96.8)
Gross Amounts Offset in the Consolidated Balance Sheets	0.0	0.0
Net Amounts of Liabilities Presented in the Consolidated Balance Sheets	(19.3)	(96.8)
Gross Amounts Not Offset in the Consolidated Balance Sheets - Financial Instruments	(0.3)	(0.8)
Gross Amounts Not Offset in the Consolidated Balance Sheets - Cash Collateral Pledged	0.0	0.0
Net Amount	(19.0)	(96.0)
Counterparty (with Netting Agreements)
Derivative Assets and Collateral Held by Counterparty
Gross Amounts of Recognized Assets	0.3	0.9
Gross Amounts Offset in the Consolidated Balance Sheets	0.0	0.0
Net Amounts of Assets Presented in the Consolidated Balance Sheets	0.3	0.9
Gross Amounts Not Offset in the Consolidated Balance Sheets - Financial Instruments	0.3	0.8
Gross Amounts Not Offset in the Consolidated Balance Sheets - Cash Collateral Received	0.0	0.0
Net Amount	0.0	0.1
Derivative Liabilities and Collateral Held by Counterparty
Gross Amounts of Recognized Liabilities	(10.9)	(8.0)
Gross Amounts Offset in the Consolidated Balance Sheets	0.0	0.0
Net Amounts of Liabilities Presented in the Consolidated Balance Sheets	(10.9)	(8.0)
Gross Amounts Not Offset in the Consolidated Balance Sheets - Financial Instruments	(0.3)	(0.8)
Gross Amounts Not Offset in the Consolidated Balance Sheets - Cash Collateral Pledged	0.0	0.0
Net Amount	(10.6)	(7.2)
Counterparty (without Netting Agreements)
Derivative Assets and Collateral Held by Counterparty
Gross Amounts of Recognized Assets		84.8
Gross Amounts Offset in the Consolidated Balance Sheets		0.0
Net Amounts of Assets Presented in the Consolidated Balance Sheets		84.8
Gross Amounts Not Offset in the Consolidated Balance Sheets - Financial Instruments		0.0
Gross Amounts Not Offset in the Consolidated Balance Sheets - Cash Collateral Received		0.0
Net Amount		84.8
Derivative Liabilities and Collateral Held by Counterparty
Gross Amounts of Recognized Liabilities	(0.5)	(85.0)
Gross Amounts Offset in the Consolidated Balance Sheets	0.0	0.0
Net Amounts of Liabilities Presented in the Consolidated Balance Sheets	(0.5)	(85.0)
Gross Amounts Not Offset in the Consolidated Balance Sheets - Financial Instruments	0.0	0.0
Gross Amounts Not Offset in the Consolidated Balance Sheets - Cash Collateral Pledged	0.0	0.0
Net Amount	(0.5)	(85.0)
Counterparty (with partial Netting Agreements)
Derivative Liabilities and Collateral Held by Counterparty
Gross Amounts of Recognized Liabilities	(7.9)	(3.8)
Gross Amounts Offset in the Consolidated Balance Sheets	0.0	0.0
Net Amounts of Liabilities Presented in the Consolidated Balance Sheets	(7.9)	(3.8)
Gross Amounts Not Offset in the Consolidated Balance Sheets - Financial Instruments	0.0	0.0
Gross Amounts Not Offset in the Consolidated Balance Sheets - Cash Collateral Pledged	0.0	0.0
Net Amount	$ (7.9)	$ (3.8)

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Income Tax Matters, Provision Table (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Tax Provision
Domestic	$ 13.4	$ 9.2	$ (149.0)	$ 32.2
Foreign	(0.8)	0.0	(2.2)	0.9
Total	$ 12.6	$ 9.2	$ (151.2)	$ 33.1

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Employee Incentive Plans (Tables)

9 Months Ended

Sep. 30, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Compensation expense relating to short term incentive plans

Total costs relating to STI Plans were recorded as follows for each period presented (in millions of dollars):

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Cost of products sold, excluding depreciation and amortization and other items	$	1.0	$	1.3	$	3.2	$	3.8
SG&A and R&D	1.9		1.6		7.6		6.1
Total costs recorded in connection with STI Plans	$	2.9	$	2.9	$	10.8	$	9.9

The following table presents the allocation of the charges detailed above, by segment (in millions of dollars):

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Fabricated Products	$	2.2	$	2.2	$	7.7	$	7.6
All Other	0.7		0.7		3.1		2.3
Total costs recorded in connection with STI Plans	$	2.9	$	2.9	$	10.8	$	9.9

Non-cash compensation expense

Non-cash compensation expense by type of award under LTI Programs were as follows for each period presented (in millions of dollars):

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Non-vested common shares and restricted stock units	$	1.1	$	0.5	$	3.3	$	2.8
EVA-Based Performance Shares	0.1		—		0.8		1.0
TSR-Based Performance Shares	1.0		0.4		2.7		1.4
Total non-cash compensation expense	$	2.2	$	0.9	$	6.8	$	5.2

The following table presents the allocation of the charges detailed above, by segment (in millions of dollars):

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Fabricated Products	$	0.8	$	0.5	$	2.4	$	2.6
All Other	1.4		0.4		4.4		2.6
Total non-cash compensation expense	$	2.2	$	0.9	$	6.8	$	5.2

Unrecognized gross compensation cost data

The following table presents unrecognized gross compensation cost data by type of award as of September 30, 2015:

	Unrecognized gross compensation costs (in millions of dollars)		Expected period (in years) over which the remaining gross compensation costs will be recognized
Non-vested common shares and restricted stock units	$	6.9	2.0
EVA-Based Performance Shares	$	0.6	0.5
TSR-Based Performance Shares	$	8.8	2.1

Summary of activity of non-vested common shares, restricted stock units, and performance shares

A summary of the activity with respect to non-vested common shares, restricted stock units, EVA-Based Performance Shares and TSR-Based Performance Shares for the nine months endedSeptember 30, 2015 was as follows:

	Non-Vested Common Shares				Restricted Stock Units				EVA-Based Performance Shares				TSR-Based Performance Shares
	Shares		Weighted-Average Grant-Date Fair Value per Share		Units		Weighted-Average Grant-Date Fair Value per Unit		Shares		Weighted-Average Grant-Date Fair Value per Share		Shares		Weighted-Average Grant-Date Fair Value per Share
Outstanding at December 31, 2014	158,770		$	59.88	5,357		$	59.71	353,576		$	50.35	150,223		$	83.18
Granted1	62,285		72.09		2,325		69.83		—		—		150,424		95.68
Vested	(58,241	)	52.76		(2,161	)	52.91		(48,648	)	44.48		—		—
Forfeited1	(793	)	67.83		—		—		(432	)	57.54		(770	)	89.12
Canceled1	—		—		—		—		(146,016	)	44.48		—		—
Outstanding at September 30, 2015	162,021		$	67.09	5,521		$	66.64	158,480		$	57.75	299,877		$	89.43

____________

¹  For EVA-Based Performance Shares and TSR-Based Performance Shares, the number of shares granted and forfeited are presented at their maximum payout; and the number of shares canceled includes the number of shares that did not vest due to EVA performance results falling below those required for maximum payout.

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Derivative Financial Instruments and Related Hedging Programs (Tables)

9 Months Ended

Sep. 30, 2015

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Summary of realized and unrealized gains and losses

Realized and unrealized (losses) gains associated with all derivative contracts consisted of the following for each period presented (in millions of dollars):

	Quarter Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Included in Other Comprehensive Income (Loss):
Unrealized (losses):
Foreign Currency	$	—		$	—		$	(0.2	)	$	—
Included in Statements of Consolidated Income (Loss):
Realized (losses) gains1:
Aluminum	(9.0		)	3.1			(18.8		)	5.2
Natural Gas	(1.2		)	(0.1		)	(3.8		)	1.1
Electricity	(0.3		)	0.1			(1.4		)	0.1
Total realized (losses) gains	$	(10.5	)	$	3.1		$	(24.0	)	$	6.4
Unrealized (losses)2:
Non-designated hedges of operational risk:
Aluminum	$	(0.3	)	$	(1.0	)	$	(8.8	)	$	1.3
Natural Gas	(1.0		)	(1.6		)	(0.2		)	(1.0		)
Electricity	(0.4		)	(1.0		)	1.3			(0.3		)
Foreign Currency	—			0.1			—			—
Total non-designated hedges of operational risk	(1.7		)	(3.5		)	(7.7		)	—
Option Assets relating to the Convertible Notes3	—			12.9			10.2			19.8
Bifurcated Conversion Feature of the Convertible Notes3	—			(10.7		)	(10.2		)	(16.2		)
Total unrealized (losses) gains	$	(1.7	)	$	(1.3	)	$	(7.7	)	$	3.6

______________________

¹  Realized (losses) gains on hedges of operational risk are recorded within Cost of products sold, excluding depreciation, amortization and other items.

²  Unrealized (losses) on hedges of operational risk are recorded within Unrealized losses on derivative instruments.

³  Unrealized (losses) gains on financial derivatives are recorded within Other income, net.

Summary of material derivative positions

The following table summarizes our material derivative positions at September 30, 2015:

Aluminum	Maturity Period (month/year)	Notional Amount of contracts (mmlbs)
Fixed price purchase contracts	10/15 through 12/16	148.9
Fixed price sales contracts	10/15 through 10/16	2.4
Midwest premium swap contracts1	10/15 through 12/16	87.8

Natural Gas2	Maturity Period (month/year)	Notional Amount of contracts (mmbtu)
Fixed price purchase contracts	10/15 through 12/18	6,820,000

Electricity3	Maturity Period (month/year)	Notional Amount of contracts (Mwh)
Fixed price purchase contracts	10/15 through 12/15	44,180

Euro	Maturity Period (month/year)	Notional Amount of contracts (euro)
Fixed price purchase contracts	11/15 through 12/16	7,315,000

______________________

¹  Regional premiums represent the premium over the London Metal Exchange price for primary aluminum which is incurred on our purchases of primary aluminum.

²  As of September 30, 2015, we had Henry Hub NYMEX-based hedge positions in place to cover exposure to fluctuations in prices for approximately 76%, 75%, 57% and 11% of the expected natural gas purchases for the remainder of 2015, 2016, 2017 and 2018, respectively.

³  As of September 30, 2015, we had Mid-C International Commodity Exchange-based hedge positions, as well as physical delivery commitments with energy companies, in place to cover our exposure to fluctuations in electricity prices for approximately 54% of the expected electricity purchases for the remainder of 2015 and each of 2016 and 2017.

Summary of offsetting derivative assets by counterparty

The following tables present offsetting information regarding our derivatives by type of counterparty as of December 31, 2014 (in millions of dollars):

Derivative Assets and Collateral Held by Counterparty
							Gross Amounts Not Offset in the Consolidated Balance Sheets
	Gross Amounts of Recognized Assets		Gross Amounts Offset in the Consolidated Balance Sheets		Net Amounts of Assets Presented in the Consolidated Balance Sheets		Financial Instruments		Cash Collateral Received		Net Amount
Counterparty (with netting agreements)	$	0.9	$	—	$	0.9	$	0.8	$	—	$	0.1
Counterparty (without netting agreements)1	84.8		—		84.8		—		—		84.8
Total	$	85.7	$	—	$	85.7	$	0.8	$	—	$	84.9

The following tables present offsetting information regarding our derivatives by type of counterparty as of September 30, 2015 (in millions of dollars):

Derivative Assets and Collateral Held by Counterparty
							Gross Amounts Not Offset in the Consolidated Balance Sheets
	Gross Amounts of Recognized Assets		Gross Amounts Offset in the Consolidated Balance Sheets		Net Amounts of Assets Presented in the Consolidated Balance Sheets		Financial Instruments		Cash Collateral Received		Net Amount
Counterparty (with netting agreements)	$	0.3	$	—	$	0.3	$	0.3	$	—	$	—
Total	$	0.3	$	—	$	0.3	$	0.3	$	—	$	—

Summary of offsetting derivative liabilities by counterparty

Derivative Liabilities and Collateral Held by Counterparty
									Gross Amounts Not Offset in the Consolidated Balance Sheets
	Gross Amounts of Recognized Liabilities			Gross Amounts Offset in the Consolidated Balance Sheets		Net Amounts of Liabilities Presented in the Consolidated Balance Sheets			Financial Instruments			Cash Collateral Pledged		Net Amount
Counterparty (with netting agreements)	$	(10.9	)	$	—	$	(10.9	)	$	(0.3	)	$	—	$	(10.6	)
Counterparty (without netting agreements)	(0.5		)	—		(0.5		)	—			—		(0.5		)
Counterparty (with partial netting agreements)	(7.9		)	—		(7.9		)	—			—		(7.9		)
Total	$	(19.3	)	$	—	$	(19.3	)	$	(0.3	)	$	—	$	(19.0	)

Derivative Liabilities and Collateral Held by Counterparty
									Gross Amounts Not Offset in the Consolidated Balance Sheets
	Gross Amounts of Recognized Liabilities			Gross Amounts Offset in the Consolidated Balance Sheets		Net Amounts of Liabilities Presented in the Consolidated Balance Sheets			Financial Instruments			Cash Collateral Pledged		Net Amount
Counterparty (with netting agreements)	$	(8.0	)	$	—	$	(8.0	)	$	(0.8	)	$	—	$	(7.2	)
Counterparty (without netting agreements)1	(85.0		)	—		(85.0		)	—			—		(85.0		)
Counterparty (with partial netting agreements)	(3.8		)	—		(3.8		)	—			—		(3.8		)
Total	$	(96.8	)	$	—	$	(96.8	)	$	(0.8	)	$	—	$	(96.0	)

_________________

¹  Such amounts include the fair value of the Bifurcated Conversion Feature and Option Assets at December 31, 2014 (see Note 9).

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Statement of Consolidated Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities:
Net loss	$ (249.9)	$ 56.2
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation of property, plant and equipment	23.0	21.9
Amortization of definite-lived intangible assets	1.2	1.2
Amortization of debt discount and debt issuance costs	4.2	8.8
Deferred income taxes – Note 4	(151.0)	29.6
Excess tax benefit upon vesting of non-vested shares and dividend payment on unvested shares expected to vest	(1.1)	(0.8)
Non-cash equity compensation	7.0	5.4
Non-cash unrealized losses (gains) on derivative instruments	7.7	(3.6)
Non-cash impairment charges	0.0	1.5
Losses on disposition of property, plant and equipment	(0.2)	(0.1)
Non-cash net periodic postretirement benefit cost (income) relating to VEBAs1	1.8	(17.7)
Non-cash loss on removal of Union VEBA net assets1	446.7	0.0
Other non-cash changes in assets and liabilities	0.4	0.5
Changes in operating assets and liabilities:
Trade and other receivables	4.2	(9.6)
Inventories	(2.6)	3.1
Prepaid expenses and other current assets	0.0	(0.9)
Accounts payable	(15.0)	28.7
Accrued liabilities1	19.7	(2.8)
Annual variable cash contributions to VEBAs1	(13.7)	(16.0)
Long-term assets and liabilities, net1	26.1	(1.9)
Net cash provided by operating activities	108.9	103.7
Cash flows from investing activities:
Capital expenditures	(38.4)	(39.6)
Purchase of available for sale securities	(0.5)	(53.4)
Proceeds from disposition of available for sale securities	84.0	82.2
Change in restricted cash	0.0	(0.7)
Net cash provided by (used in) investing activities	45.1	(11.5)
Cash flows from financing activities:
Repurchase of Senior Notes2	(6.1)	0.0
Settlement of Convertible Notes2	(175.0)	0.0
Proceeds from cash-settled call options related to settlement of Convertible Notes2	94.9	0.0
Payment for conversion premium related to settlement of Convertible Notes2	(94.9)	0.0
Excess tax benefit upon vesting of non-vested shares and dividend payment on unvested shares expected to vest	1.1	0.8
Cancellation of shares to cover employees’ tax withholdings upon vesting of non-vested shares	(3.0)	(2.4)
Repurchase of common stock	(45.1)	(28.7)
Cash dividend paid to stockholders	(21.0)	(19.1)
Net cash used in financing activities	(249.1)	(49.4)
Net (decrease) increase in cash and cash equivalents during the period	(95.1)	42.8
Cash and cash equivalents at beginning of period	177.7	169.5
Cash and cash equivalents at end of period	$ 82.6	$ 212.3

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2015

Fair Value Disclosures [Abstract]

Summary of assets and liabilities measured and recognized at fair value on a recurring basis

The following table presents our financial instruments, classified under the appropriate level of the fair value hierarchy, as of the period presented (in millions of dollars):

	September 30, 2015
	Level 1			Level 2			Level 3			Total
FINANCIAL ASSETS:
Derivative Instruments (Non-Designated Hedges):
Aluminum -
Fixed price sales contracts	$	—		$	0.2		$	—		$	0.2
Midwest premium swap contracts	—			—			0.1			0.1
All Other Financial Assets:
Cash and cash equivalents	37.1			45.5			—			82.6
Short-term investments	—			30.0			—			30.0
Deferred compensation plan asset	—			7.0			—			7.0
Total assets	$	37.1		$	82.7		$	0.1		$	119.9
FINANCIAL LIABILITIES:
Derivative Instruments (Non-Designated Hedges):
Aluminum -
Fixed price purchase contracts	$	—		$	(10.3	)	$	—		$	(10.3	)
Midwest premium swap contracts	—			—			(2.0		)	(2.0		)
Natural Gas - Fixed price purchase contracts	—			(6.4		)	—			(6.4		)
Electricity - Fixed price purchase contracts	—			(0.4		)	—			(0.4		)
Derivative Instruments (Designated Hedges):
Foreign Currency - Euro forward purchase contracts	—			(0.2		)	—			(0.2		)
All Other Financial Liabilities:
Senior Notes	(233.0		)	—			—			(233.0		)
Total liabilities	$	(233.0	)	$	(17.3	)	$	(2.0	)	$	(252.3	)

The following table presents our financial instruments, classified under the appropriate level of the fair value hierarchy, as of the period presented (in millions of dollars):

	December 31, 2014
	Level 1			Level 2			Level 3		Total
FINANCIAL ASSETS:
Derivative Instruments (Non-Designated Hedges):
Aluminum - Midwest premium swap contracts	$	—		$	—		$	1.0	$	1.0
Hedges Relating to the Convertible Notes - Option Assets	—			84.7			—		84.7
All Other Financial Assets:
Cash and cash equivalents	29.5			148.2			—		177.7
Short-term investments	—			114.0			—		114.0
Deferred compensation plan asset	—			7.3			—		7.3
Total assets	$	29.5		$	354.2		$	1.0	$	384.7
FINANCIAL LIABILITIES:
Derivative Instruments (Non-Designated Hedges):
Aluminum - Fixed price purchase contracts	$	—		$	(4.2	)	$	—	$	(4.2	)
Natural Gas - Fixed price purchase contracts	—			(6.2		)	—		(6.2		)
Electricity - Fixed price purchase contracts	—			(1.7		)	—		(1.7		)
Hedges Relating to the Convertible Notes - Bifurcated Conversion Feature	—			(84.7		)	—		(84.7		)
All Other Financial Liabilities:
Senior Notes	(244.5		)	—			—		(244.5		)
Convertible Notes, including Bifurcated Conversion Feature	(263.3		)	—			—		(263.3		)
Total liabilities	$	(507.8	)	$	(96.8	)	$	—	$	(604.6	)

Reconciliation of activity for financial instruments classified as Level 3

The following table presents a reconciliation of activity for the Midwest premium derivative contracts on a net basis (in millions of dollars):

	Level 3
Balance at December 31, 2014	$	1.0
Total realized/unrealized losses included in:
Cost of goods sold excluding depreciation and amortization and other items and Unrealized losses on derivative instruments	(3.9		)
Transactions involving Level 3 derivative contracts:
Purchases	(5.4		)
Sales	—
Issuances	—
Settlements	6.4
Transactions involving Level 3 derivatives — net	1.0
Transfers in and/or out of Level 3 valuation hierarchy	—
Balance at September 30, 2015	$	(1.9	)
Total losses included in Unrealized losses on derivative instruments, attributable to the change in unrealized gains/losses relating to derivative contracts held at September 30, 2015:	$	(2.0	)

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Summary of Significant Accounting Policies, Textuals, Property, Plant and Equipment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Property, Plant and Equipment
Interest expense capitalized as construction in progress	$ 0.4	$ 0.3	$ 1.1	$ 2.2
Non-cash impairment charges		1.3	0.0	1.5
Depreciation expense			23.0	21.9
Fabricated Products
Property, Plant and Equipment
Depreciation expense	$ 7.5	$ 7.4	$ 22.6	$ 21.5

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Derivative Financial Instruments and Related Hedging Programs, Hedging Discussion (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($) mmlbs	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) mmlbs	Sep. 30, 2014 USD ($) mmlbs	Sep. 30, 2015 EUR (€) mmlbs	Dec. 31, 2014 USD ($)	Mar. 29, 2010 USD ($)
Derivative [Line Items]
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	$ 0.0
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months			$ 0.0
Unrealized loss on foreign currency cash flow hedges	0.0	$ 0.0	(0.2)	$ 0.0
Gain (Loss) on Foreign Currency Cash Flow Hedge Ineffectiveness	0.0		0.0
Derivative Financial Instruments and Related Hedging Programs (Textuals) [Abstract]
Aggregate fair value of derivative instruments that contain credit-risk-related contingency features that were in a net liability position	$ 18.5		$ 18.5			$ 11.4
Total fabricated products shipments containing fixed price terms | mmlbs			148.6	109.3
Remainder of 2015
Derivative Financial Instruments and Related Hedging Programs (Textuals) [Abstract]
Firm price customer sales contracts containing price risk on anticipated purchases of primary aluminum | mmlbs	52.7		52.7		52.7
2016
Derivative Financial Instruments and Related Hedging Programs (Textuals) [Abstract]
Firm price customer sales contracts containing price risk on anticipated purchases of primary aluminum | mmlbs	93.8		93.8		93.8
Convertible Debt
Derivative Financial Instruments and Related Hedging Programs (Textuals) [Abstract]
Principal amount of notes							$ 175.0
Swap [Member] | Designated as Hedging Instrument [Member] | Foreign Currency Member | Purchase
Derivative [Line Items]
Derivative Liability, Notional Amount | €					€ 7,315,000
Derivative, Average Forward Exchange Rate	1.14		1.14		1.14
Minimum | Swap [Member] | Designated as Hedging Instrument [Member] | Foreign Currency Member | Purchase
Derivative [Line Items]
Derivative, Remaining Maturity			1 month
Maximum | Swap [Member] | Designated as Hedging Instrument [Member] | Foreign Currency Member | Purchase
Derivative [Line Items]
Derivative, Remaining Maturity			15 months

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Guarantor and Non-Guarantor Financial Statements, Balance Sheets (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 82.6	$ 177.7	$ 212.3	$ 169.5
Short-term investments	30.0	114.0
Receivables:
Trade receivables — net	131.6	129.3
Intercompany receivables	0.0	0.0
Other	4.4	10.9
Inventories	217.3	214.7
Prepaid expenses and other current assets	98.6	178.6
Total current assets	564.5	825.2
Investments in and advances to subsidiaries	0.0	0.0
Property, plant and equipment – net	472.7	454.9
Long-term intercompany receivables	0.0	0.0
Net assets of Union VEBA	0.0	340.1
Deferred tax assets — net	135.7	30.9
Intangible assets – net	30.9	32.1
Goodwill	37.2	37.2
Other assets	22.1	23.3
Total	1,263.1	1,743.7
Current liabilities:
Accounts payable	69.3	81.4
Intercompany payable	0.0	0.0
Accrued salaries, wages and related expenses	38.4	39.6
Other accrued liabilities	61.4	132.8
Current portion of long-term debt	0.0	172.5
Short-term capital leases	0.1	0.1
Total current liabilities	169.2	426.4
Net liabilities of Salaried VEBA	15.9	17.2
Deferred tax liabilities	0.8	0.9
Long-term intercompany payable	0.0	0.0
Long-term liabilities	86.0	58.3
Long-term debt	218.9	225.0
Total liabilities	490.8	727.8
Total stockholders’ equity	772.3	1,015.9
Total	1,263.1	1,743.7
Parent
Current assets:
Cash and cash equivalents	0.0	0.0	0.0	5.0
Short-term investments	0.0	0.0
Receivables:
Trade receivables — net	0.0	0.0
Intercompany receivables	29.2	204.2
Other	0.0	0.0
Inventories	0.0	0.0
Prepaid expenses and other current assets	0.1	85.1
Total current assets	29.3	289.3
Investments in and advances to subsidiaries	1,057.2	1,209.2
Property, plant and equipment – net	0.0	0.0
Long-term intercompany receivables	0.0	0.0
Net assets of Union VEBA		0.0
Deferred tax assets — net	0.0	0.0
Intangible assets – net	0.0	0.0
Goodwill	0.0	0.0
Other assets	3.7	4.4
Total	1,090.2	1,502.9
Current liabilities:
Accounts payable	0.7	1.3
Intercompany payable	92.3	0.0
Accrued salaries, wages and related expenses	0.0	0.0
Other accrued liabilities	6.0	88.2
Current portion of long-term debt		172.5
Short-term capital leases	0.0	0.0
Total current liabilities	99.0	262.0
Net liabilities of Salaried VEBA	0.0	0.0
Deferred tax liabilities	0.0	0.0
Long-term intercompany payable	0.0	0.0
Long-term liabilities	0.0	0.0
Long-term debt	218.9	225.0
Total liabilities	317.9	487.0
Total stockholders’ equity	772.3	1,015.9
Total	1,090.2	1,502.9
Guarantor Subsidiaries
Current assets:
Cash and cash equivalents	79.6	175.3	208.6	157.7
Short-term investments	30.0	114.0
Receivables:
Trade receivables — net	127.8	126.1
Intercompany receivables	96.8	4.0
Other	2.1	5.6
Inventories	213.7	208.0
Prepaid expenses and other current assets	98.1	93.1
Total current assets	648.1	726.1
Investments in and advances to subsidiaries	32.3	32.5
Property, plant and equipment – net	444.2	437.4
Long-term intercompany receivables	0.0	0.0
Net assets of Union VEBA		340.1
Deferred tax assets — net	128.6	23.8
Intangible assets – net	30.9	32.1
Goodwill	37.2	37.2
Other assets	18.3	18.8
Total	1,339.6	1,648.0
Current liabilities:
Accounts payable	64.1	73.8
Intercompany payable	42.6	221.3
Accrued salaries, wages and related expenses	35.5	36.5
Other accrued liabilities	55.6	43.8
Current portion of long-term debt		0.0
Short-term capital leases	0.1	0.1
Total current liabilities	197.9	375.5
Net liabilities of Salaried VEBA	15.9	17.2
Deferred tax liabilities	0.0	0.0
Long-term intercompany payable	2.4	15.9
Long-term liabilities	80.9	50.3
Long-term debt	0.0	0.0
Total liabilities	297.1	458.9
Total stockholders’ equity	1,042.5	1,189.1
Total	1,339.6	1,648.0
Non-Guarantor Subsidiaries
Current assets:
Cash and cash equivalents	3.0	2.4	3.7	6.8
Short-term investments	0.0	0.0
Receivables:
Trade receivables — net	3.8	3.2
Intercompany receivables	2.6	0.9
Other	2.3	5.3
Inventories	6.0	7.6
Prepaid expenses and other current assets	1.3	0.4
Total current assets	19.0	19.8
Investments in and advances to subsidiaries	0.0	0.0
Property, plant and equipment – net	28.5	17.5
Long-term intercompany receivables	2.4	15.9
Net assets of Union VEBA		0.0
Deferred tax assets — net	0.0	0.0
Intangible assets – net	0.0	0.0
Goodwill	0.0	0.0
Other assets	0.1	0.1
Total	50.0	53.3
Current liabilities:
Accounts payable	4.5	6.3
Intercompany payable	3.8	3.3
Accrued salaries, wages and related expenses	2.9	3.1
Other accrued liabilities	0.7	0.8
Current portion of long-term debt		0.0
Short-term capital leases	0.0	0.0
Total current liabilities	11.9	13.5
Net liabilities of Salaried VEBA	0.0	0.0
Deferred tax liabilities	0.8	0.9
Long-term intercompany payable	0.0	0.0
Long-term liabilities	5.1	8.0
Long-term debt	0.0	0.0
Total liabilities	17.8	22.4
Total stockholders’ equity	32.2	30.9
Total	50.0	53.3
Consolidating Adjustments
Current assets:
Cash and cash equivalents	0.0	0.0	$ 0.0	$ 0.0
Short-term investments	0.0	0.0
Receivables:
Trade receivables — net	0.0	0.0
Intercompany receivables	(128.6)	(209.1)
Other	0.0	0.0
Inventories	(2.4)	(0.9)
Prepaid expenses and other current assets	(0.9)	0.0
Total current assets	(131.9)	(210.0)
Investments in and advances to subsidiaries	(1,089.5)	(1,241.7)
Property, plant and equipment – net	0.0	0.0
Long-term intercompany receivables	(2.4)	(15.9)
Net assets of Union VEBA		0.0
Deferred tax assets — net	7.1	7.1
Intangible assets – net	0.0	0.0
Goodwill	0.0	0.0
Other assets	0.0	0.0
Total	(1,216.7)	(1,460.5)
Current liabilities:
Accounts payable	0.0	0.0
Intercompany payable	(138.7)	(224.6)
Accrued salaries, wages and related expenses	0.0	0.0
Other accrued liabilities	(0.9)	0.0
Current portion of long-term debt		0.0
Short-term capital leases	0.0	0.0
Total current liabilities	(139.6)	(224.6)
Net liabilities of Salaried VEBA	0.0	0.0
Deferred tax liabilities	0.0	0.0
Long-term intercompany payable	(2.4)	(15.9)
Long-term liabilities	0.0	0.0
Long-term debt	0.0	0.0
Total liabilities	(142.0)	(240.5)
Total stockholders’ equity	(1,074.7)	(1,220.0)
Total	$ (1,216.7)	$ (1,460.5)

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Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 82.6	$ 177.7
Short-term investments	30.0	114.0
Receivables:
Trade receivables – net	131.6	129.3
Other	4.4	10.9
Inventories	217.3	214.7
Prepaid expenses and other current assets	98.6	178.6
Total current assets	564.5	825.2
Property, plant and equipment – net	472.7	454.9
Net assets of Union VEBA	0.0	340.1
Deferred tax assets – net (including deferred tax liability relating to the Union VEBA of $0.0 and $127.0 at September 30, 2015 and December 31, 2014, respectively)	135.7	30.9
Intangible assets – net	30.9	32.1
Goodwill	37.2	37.2
Other assets	22.1	23.3
Total	1,263.1	1,743.7
Current liabilities:
Accounts payable	69.3	81.4
Accrued salaries, wages and related expenses	38.4	39.6
Other accrued liabilities	61.4	132.8
Current portion of long-term debt	0.0	172.5
Short-term capital leases	0.1	0.1
Total current liabilities	169.2	426.4
Net liabilities of Salaried VEBA	15.9	17.2
Deferred tax liabilities	0.8	0.9
Long-term liabilities	86.0	58.3
Long-term debt	218.9	225.0
Total liabilities	$ 490.8	$ 727.8
Commitments and contingencies – Note 7
Stockholders’ equity:
Preferred stock, 5,000,000 shares authorized at both September 30, 2015 and December 31, 2014; no shares were issued and outstanding at September 30, 2015 and December 31, 2014	$ 0.0	$ 0.0
Common stock, par value $0.01, 90,000,000 shares authorized at both September 30, 2015 and at December 31, 2014; 21,793,040 shares issued and 17,603,730 shares outstanding at September 30, 2015; 21,197,164 shares issued and 17,607,251 shares outstanding at December 31, 2014	0.2	0.2
Additional paid in capital	1,033.6	1,028.5
Retained earnings	9.7	280.4
Treasury stock, at cost, 4,189,310 shares at September 30, 2015 and 3,589,913 shares at December 31, 2014, respectively	(242.5)	(197.1)
Accumulated other comprehensive loss	(28.7)	(96.1)
Total stockholders’ equity	772.3	1,015.9
Total	$ 1,263.1	$ 1,743.7

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Income Tax Matters, Textuals (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2015	Mar. 31, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Income Tax Contingency
Income tax provision (benefit)	$ 12.6		$ 9.2	$ (151.2)	$ 33.1
Effective tax rate	36.30%		36.70%	37.70%	37.00%
Gross unrecognized tax benefits	$ 1.6			$ 1.6		$ 2.2
Gross unrecognized tax benefits that would impact effective tax rate	0.5			$ 0.5		$ 1.1
Union VEBA
Income Tax Contingency
Income tax benefit on removal of Union VEBA net assets	$ 184.4	$ 184.4

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Statement of Consolidated Stockholders' Equity - 9 months ended Sep. 30, 2015 - USD ($) $ in Millions	Total	Common Stock	Additional Paid in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss
Beginning balance, shares at Dec. 31, 2014	17,607,251	17,607,251
Beginning balance at Dec. 31, 2014	$ 1,015.9	$ 0.2	$ 1,028.5	$ 280.4	$ (197.1)	$ (96.1)
Stockholders' Equity [Roll Forward]
Net loss	(249.9)			(249.9)
Other comprehensive income, net of tax	67.4					67.4
Issuance of non-vested shares to employees and non-employee directors		62,285
Issuance of common shares to non-employee directors		2,436
Issuance of common shares to non-employee directors	0.2		0.2
Issuance of common shares to employees upon vesting of restricted stock units and performance shares		50,809
Cancellation of employee non-vested shares		(793)
Cancellation of shares to cover employees’ tax withholdings upon vesting of non-vested shares		(35,081)
Cancellation of shares to cover employees’ tax withholdings upon vesting of non-vested shares	$ (3.0)		(3.0)
Repurchase of common stock	(599,397)	(599,397)
Repurchase of common stock	$ (45.4)				(45.4)
Issuance of stock warrants		516,220
Cash dividends on common stock ($1.20 per share)	(21.0)			(21.0)
Excess tax benefit upon vesting of non-vested shares and dividend payment on unvested shares expected to vest	1.1		1.1
Amortization of unearned equity compensation	6.8		6.8
Dividends on unvested equity awards that were canceled	$ 0.2			0.2
Ending balance, shares at Sep. 30, 2015	17,603,730	17,603,730
Ending balance at Sep. 30, 2015	$ 772.3	$ 0.2	$ 1,033.6	$ 9.7	$ (242.5)	$ (28.7)

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Fair Value Measurements, Level 3 Fair Value Input Reconciliation Table (Details) - Derivative - Midwest premium swap contracts $ in Millions	9 Months Ended
	Sep. 30, 2015 USD ($)
Reconciliation of activity for financial instruments classified as Level 3:
Balance at December 31, 2014	$ 1.0
Total realized/unrealized losses included in:
Cost of goods sold excluding depreciation and amortization and other items and Unrealized losses on derivative instruments	(3.9)
Transactions involving Level 3 derivative contracts:
Purchases	(5.4)
Sales	0.0
Issuances	0.0
Settlements	6.4
Transactions involving Level 3 derivatives — net	1.0
Transfers in and/or out of Level 3 valuation hierarchy	0.0
Balance at September 30, 2015	(1.9)
Total losses included in Unrealized losses on derivative instruments, attributable to the change in unrealized gains/losses relating to derivative contracts held at September 30, 2015:	$ (2.0)

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Supplemental Cash Flow Information (Tables)

9 Months Ended

Sep. 30, 2015

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow Information

	Nine Months Ended
	September 30,
	2015		2014
	(In millions of dollars)
Interest paid	$	13.5	$	12.2
Non-cash investing and financing activities:
Stock repurchases not yet settled (accrued in accounts payable)	$	0.3	$	0.2
Unpaid purchases of property and equipment	$	4.4	$	1.8

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Segment Information, Financial Information by Reporting Segment Table (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Net sales:
Net Sales	$ 336.4	$ 338.9	$ 1,075.3	$ 1,018.1
Segment operating income (loss):
Operating income (loss)	40.5	32.6	(381.1)	111.1
Interest expense	(4.9)	(9.7)	(19.9)	(27.7)
Other income (expense), net	(0.9)	2.2	(0.1)	5.9
Income (loss) before income taxes	34.7	25.1	(401.1)	89.3
Non-cash net periodic postretirement benefit cost (income) relating to VEBAs1	0.6	(6.0)	1.8	(17.7)
Depreciation and amortization:
Depreciation and amortization	8.1	8.0	24.2	23.1
Capital expenditures:
Capital expenditures	15.5	9.5	38.4	39.6
Income taxes paid:
Income taxes paid	0.3	1.6	1.9	2.7
Assets:
Assets	1,263.1		1,263.1		$ 1,743.7
United States
Income taxes paid:
Income taxes paid	0.1	1.4	0.4	1.6
Canada
Income taxes paid:
Income taxes paid	0.2	0.2	1.5	1.1
Fabricated Products
Net sales:
Net Sales	336.4	338.9	1,075.3	1,018.1
Segment operating income (loss):
Operating income (loss)	47.3	35.6	142.8	121.2
Depreciation and amortization:
Depreciation and amortization	7.9	7.8	23.8	22.7
Capital expenditures:
Capital expenditures	15.1	9.3	37.8	38.8
Assets:
Assets	897.3		897.3		878.9
All Other
Segment operating income (loss):
Operating income (loss)	(6.8)	(3.0)	(523.9)	(10.1)
Depreciation and amortization:
Depreciation and amortization	0.2	0.2	0.4	0.4
Capital expenditures:
Capital expenditures	0.4	0.2	0.6	0.8
Assets:
Assets	365.8		365.8		$ 864.8
VEBAs
Segment operating income (loss):
Non-cash net periodic postretirement benefit cost (income) relating to VEBAs1	0.6	(6.0)	1.8	(17.7)
Pre-tax loss on settlement of Union VEBA	$ (2.9)	$ 0.0	$ 490.9	$ 0.0

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Other Comprehensive Income

9 Months Ended

Sep. 30, 2015

Statement of Comprehensive Income [Abstract]

Other Comprehensive Income Disclosure

Other Comprehensive Income

The following table presents the tax effect allocated to each component of other comprehensive income (loss) for each period presented (in millions of dollars):

	Before-Tax			Income Tax			Net-of-Tax
	Amount			(Expense) Benefit4			Amount
Quarter Ended September 30, 2015
Salaried VEBA:
Reclassification adjustments:
Amortization of net actuarial loss1	$	0.3		$	(0.1	)	$	0.2
Amortization of prior service cost1	0.7			(0.2		)	0.5
Other comprehensive income relating to Salaried VEBA	1.0			(0.3		)	0.7
Available for sale securities:
Unrealized loss on available for sale securities	(0.4		)	0.1			(0.3		)
Reclassification adjustments:
Reclassification of unrealized gain upon sale of available for sale securities3	(0.1		)	0.1			—
Other comprehensive loss relating to available for sale securities	(0.5		)	0.2			(0.3		)
Foreign currency translation loss	(0.3		)	—			(0.3		)
Other comprehensive income	$	0.2		$	(0.1	)	$	0.1
Quarter Ended September 30, 2014
VEBAs:
Reclassification adjustments:
Amortization of net actuarial gain2	$	(0.5	)	$	0.2		$	(0.3	)
Amortization of prior service cost2	2.6			(1.0		)	1.6
Other comprehensive income relating to VEBAs	2.1			(0.8		)	1.3
Unrealized loss on available for sale securities	(0.2		)	0.1			(0.1		)
Foreign currency translation gain	0.1			—			0.1
Other comprehensive income	$	2.0		$	(0.7	)	$	1.3

	Before-Tax			Income Tax			Net-of-Tax
	Amount			(Expense) Benefit4			Amount
Nine Months Ended September 30, 2015
VEBAs:
Reclassification adjustments:
Amortization of net actuarial loss1	$	0.8		$	(0.3	)	$	0.5
Amortization of prior service cost1	2.2			(0.8		)	1.4
Removal of obligation relating to Union VEBA	106.6			(40.4		)	66.2
Other comprehensive income relating to VEBAs	109.6			(41.5		)	68.1
Available for sale securities:
Unrealized loss on available for sale securities	(0.7		)	0.2			(0.5		)
Reclassification adjustments:
Reclassification of unrealized loss upon sale of available for sale securities3	0.1			—			0.1
Other comprehensive loss relating to available for sale securities	(0.6		)	0.2			(0.4		)
Unrealized loss on foreign currency cash flow hedges	(0.2		)	0.1			(0.1		)
Foreign currency translation loss	(0.2		)	—			(0.2		)
Other comprehensive income	$	108.6		$	(41.2	)	$	67.4
Nine Months Ended September 30, 2014
VEBAs:
Reclassification adjustments:
Amortization of net actuarial (gain)2	$	(1.4	)	$	0.5		$	(0.9	)
Amortization of prior service cost2	8.0			(3.0		)	5.0
Other comprehensive income relating to VEBAs	6.6			(2.5		)	4.1
Available for sale securities:
Unrealized gain on available for sale securities	0.1			—			0.1
Reclassification adjustments:
Reclassification of unrealized gain upon sale of available for sale securities3	(0.2		)	0.1			(0.1		)
Other comprehensive loss relating to available for sale securities	(0.1		)	0.1			—
Foreign currency translation gain	0.2			—			0.2
Other comprehensive income	$	6.7		$	(2.4	)	$	4.3

________________

¹  Amounts reclassified out of Accumulated other comprehensive loss relating to VEBA adjustments were included as a component of Net periodic postretirement benefit cost (income) relating to the Salaried VEBA.

²  Amounts reclassified out of Accumulated other comprehensive loss relating to VEBA adjustments were included as a component of Net periodic postretirement benefit cost (income) relating to both VEBAs.

³  Amounts reclassified out of Accumulated other comprehensive loss relating to sales of available for sale securities were included as a component of Other (expense) income, net. We use the specific identification method to determine the amount reclassified out of Accumulated other comprehensive loss.

⁴  Income tax amounts reclassified out of Accumulated other comprehensive loss were included as a component of Income tax (provision) benefit.

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Other Income (Expense), Net (Tables)

9 Months Ended

Sep. 30, 2015

Other Income and Expenses [Abstract]

Other Income (Expense), Net

Other income, net consisted of the following for each period presented (in millions of dollars):

	Quarter Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Interest income	$	0.1		$	0.3		$	0.3		$	0.8
Unrealized gains on financial derivatives1	—			2.2			—			3.6
Realized gains on investments	—			—			0.5			0.4
All other (expense) income, net	(1.0		)	(0.3		)	(0.9		)	1.1
Other (expense) income, net	$	(0.9	)	$	2.2		$	(0.1	)	$	5.9

______________________

¹  See "Hedges Relating to the Convertible Notes" in Note 8 for discussion of such instruments.

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Subsequent Events

9 Months Ended

Sep. 30, 2015

Subsequent Events [Abstract]

Subsequent Events

Subsequent Events

Dividend Declaration. On October 13, 2015, we announced that our Board of Directors declared a cash dividend of $0.40 per common share or approximately $7.1 million (including dividend equivalents), which will be paid on or about November 13, 2015 to stockholders of record at the close of business on October 23, 2015.

Common Stock Issued Upon Exercises of Warrants. Beginning on October 1, 2015 and through October 19, 2015, 102,555 shares of our common stock were issued and 8,200 shares of our common stock were pending settlement in connection with exercises of the Warrants at an exercise price of $60.32. For additional information related to the Warrants, see Note 3 and Note 10.

Anti-dilution Adjustments to Warrants. Effective October 21, 2015, the ex-dividend date for the quarter’s dividend payable November 13, 2015, the Warrants’ exercise price will be $60.20 per share.

Repurchase of Senior Notes. Beginning on October 1, 2015 and through October 19, 2015, we repurchased $21.1 million aggregate principal amount of Senior Notes for approximately 107.5% of face value plus accrued interest. See Note 3 for additional information about the repurchase of our Senior Notes.

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Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Supplemental disclosure of cash flow information:
Interest paid	$ 13.5	$ 12.2
Non-cash investing and financing activities:
Stock repurchases not yet settled (accrued in accounts payable)	0.3	0.2
Unpaid purchases of property and equipment	$ 4.4	$ 1.8

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Statement of Consolidated Stockholders' Equity Statement of Consolidated Stockholders' Equity (Parenthetical)	9 Months Ended
	Sep. 30, 2015 $ / shares
Common Stock, Dividends, Per Share, Declared	$ 1.20
Retained Earnings
Common Stock, Dividends, Per Share, Declared	$ 1.20

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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Receivables:
Allowance for doubtful receivables	$ 0.8	$ 0.8
Deferred tax liabilities relating to the VEBAs	$ 0.0	$ 127.0
Stockholders' equity:
Preferred Stock, shares authorized	5,000,000	5,000,000
Preferred Stock, shares issued	0	0
Preferred Stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	90,000,000	90,000,000
Common Stock, shares issued	21,793,040	21,197,164
Common stock, shares outstanding	17,603,730	17,607,251
Treasury stock, shares	4,189,310	3,589,913

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Fair Value Measurements

9 Months Ended

Sep. 30, 2015

Fair Value Disclosures [Abstract]

Fair Value Measurement

Fair Value Measurements

Overview

We apply the fair value hierarchy established by GAAP for the recognition and measurement of certain financial assets and liabilities. An asset or liability’s fair value classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement. In determining fair value, we utilize valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible, and consider counterparty risk in our assessment of fair value.

The fair values of financial assets and liabilities are evaluated and measured on a recurring basis. As part of that evaluation process, we review the underlying inputs that are significant to the fair value measurement of financial instruments to determine if a transfer among hierarchy levels is appropriate. We historically have not had significant transfers into or out of each hierarchy level.

Financial assets and liabilities that we measure at fair value as required by GAAP include: (i) our derivative instruments; (ii) the plan assets of the VEBAs and our Canadian defined benefit pension plan measured annually at December 31; and (iii) available for sale securities, consisting of debt investment securities and investments related to our deferred compensation plan (see Note 5). We record certain other financial assets and liabilities at carrying value (see the tables below for the fair value disclosure of those assets and liabilities).

The majority of our non-financial assets and liabilities, which include goodwill, intangible assets, inventories and property, plant and equipment, are not required to be measured at fair value on a recurring basis. However, if certain triggering events occur (or at least annually for goodwill), an evaluation of a non-financial asset or liability is required, potentially resulting in an adjustment to the carrying amount of such asset or liability.

Fair Values of Financial Assets and Liabilities

Derivative Assets and Liabilities. Our derivative contracts are valued at fair value using significant observable and unobservable inputs.

Commodity, Energy and Foreign Currency Derivatives - The fair values of a majority of these derivative contracts are based upon trades in liquid markets. Valuation model inputs can generally be verified, and valuation techniques do not involve significant judgment. The fair values of such financial instruments are generally classified within Level 2 of the fair value hierarchy. We, however, have some derivative contracts that do not have observable market quotes. For these financial instruments, management uses significant unobservable inputs (e.g., information concerning regional premiums for swaps). Where appropriate, valuations are adjusted for various factors, such as bid/offer spreads. The fair values of these financial instruments are classified as Level 3 in the fair value hierarchy.

Bifurcated Conversion Feature and Option Assets -At December 31, 2014, the fair value of the Bifurcated Conversion Feature was classified as Level 2 in the fair value hierarchy and measured as the difference in the estimated fair value of the Convertible Notes (based on the trading price of the Convertible Notes) and the estimated fair value of the Convertible Notes without the cash conversion feature (present value of the series of the remaining fixed income cash flows under the Convertible Notes, with a maturity of April 1, 2015). Due to the short duration before maturity, management concluded that the fair value of the Option Assets should equal the fair value of the Bifurcated Conversion Feature as of December 31, 2014. As of December 31, 2014, the Bifurcated Conversion Feature and Option Assets were included in the Consolidated Balance Sheet as a portion of Other accrued liabilities and Prepaid expenses and other current assets, respectively. As of September 30, 2015, all balances related to the Convertible Notes, Bifurcated Conversion Feature and Option Assets had been settled.

The aggregate fair value of our derivatives, recorded on the Consolidated Balance Sheets at September 30, 2015 and December 31, 2014, was a net liability of $19.0 million and $11.1 million, respectively. The increase in net liability position during the quarter ended September 30, 2015 was primarily due to changes in the underlying commodity and energy prices, as well as settlements of asset positions during such period. Changes in the fair value of our derivative contracts relating to non-designated hedges of operational activities are reflected in Operating income (loss) (see Note 8).

VEBA and Canadian Pension Plan Assets. The plan assets of the VEBAs and our Canadian pension plan are measured annually on December 31 and reflected in our Consolidated Balance Sheets at fair value. In determining the fair value of the plan assets at each annual period end, we utilize primarily the results of valuations supplied by the investment advisors responsible for managing the assets of each plan, which we independently review for reasonableness. With respect to the VEBAs, the investment advisors providing the valuations are engaged by the VEBA trustees. As previously discussed, in January 2015, members of the USW at our Newark and Trentwood facilities ratified a new five-year CBA, which did not did not extend our obligation to make annual variable contributions to the Union VEBA for any period after September 2017. As a result of the expiration of our obligation to make annual variable contributions to the Union VEBA, we removed the assets of the Union VEBA from our Consolidated Balance Sheets during the quarter ended March 31, 2015 based on the valuation at December 31, 2014 (See Note 5).

Available for Sale Securities. We hold debt investment securities. The fair value of the debt investment securities, which consist of commercial paper and corporate bonds, is determined based on valuation models that use observable market data. At September 30, 2015, the remaining maturity period with respect to short-term investments ranged from approximately five to seven months. We review our debt investment portfolio for other-than-temporary impairment at least quarterly or when there are changes in credit risk or other potential valuation concerns exists. At September 30, 2015 and September 30, 2014, the total unrealized loss, net of tax, included in accumulated other comprehensive income was immaterial and was not other-than-temporarily impaired. We believe that it is probable that the principal and interest will be collected in accordance with the contractual terms, and that the unrealized losses on these securities were due to changes in normal market fluctuations, and were not due to increased credit risk or other valuation concerns. In addition to debt investment securities, we also hold assets in various investment funds at certain registered investment companies in connection with our deferred compensation program (see Note 5). Such assets are accounted for as available for sale securities and are measured and recorded at fair value based on the net asset value of the investment funds on a recurring basis. The fair value input of the available for sale securities is considered either a Level 1 or Level 2 input depending on whether the debt security or investment fund is traded on a public exchange. The amortized cost for available for sale securities approximates their fair value.

All Other Financial Assets and Liabilities. We believe that the fair value of our cash and cash equivalents, accounts receivable, accounts payable and accrued liabilities approximate their respective carrying values due to their short maturities and nominal credit risk.

The fair values of the Convertible Notes at December 31, 2014 and the Senior Notes at both September 30, 2015 and December 31, 2014 are based on their trading prices at each respective period end date and are considered Level 1 inputs in the fair value hierarchy (see Note 3 for the carrying values of the Convertible Notes and the Senior Notes). The Convertible Notes were settled on April 1, 2015.

The following table presents our financial instruments, classified under the appropriate level of the fair value hierarchy, as of the period presented (in millions of dollars):

	September 30, 2015
	Level 1			Level 2			Level 3			Total
FINANCIAL ASSETS:
Derivative Instruments (Non-Designated Hedges):
Aluminum -
Fixed price sales contracts	$	—		$	0.2		$	—		$	0.2
Midwest premium swap contracts	—			—			0.1			0.1
All Other Financial Assets:
Cash and cash equivalents	37.1			45.5			—			82.6
Short-term investments	—			30.0			—			30.0
Deferred compensation plan asset	—			7.0			—			7.0
Total assets	$	37.1		$	82.7		$	0.1		$	119.9
FINANCIAL LIABILITIES:
Derivative Instruments (Non-Designated Hedges):
Aluminum -
Fixed price purchase contracts	$	—		$	(10.3	)	$	—		$	(10.3	)
Midwest premium swap contracts	—			—			(2.0		)	(2.0		)
Natural Gas - Fixed price purchase contracts	—			(6.4		)	—			(6.4		)
Electricity - Fixed price purchase contracts	—			(0.4		)	—			(0.4		)
Derivative Instruments (Designated Hedges):
Foreign Currency - Euro forward purchase contracts	—			(0.2		)	—			(0.2		)
All Other Financial Liabilities:
Senior Notes	(233.0		)	—			—			(233.0		)
Total liabilities	$	(233.0	)	$	(17.3	)	$	(2.0	)	$	(252.3	)

The following table presents our financial instruments, classified under the appropriate level of the fair value hierarchy, as of the period presented (in millions of dollars):

	December 31, 2014
	Level 1			Level 2			Level 3		Total
FINANCIAL ASSETS:
Derivative Instruments (Non-Designated Hedges):
Aluminum - Midwest premium swap contracts	$	—		$	—		$	1.0	$	1.0
Hedges Relating to the Convertible Notes - Option Assets	—			84.7			—		84.7
All Other Financial Assets:
Cash and cash equivalents	29.5			148.2			—		177.7
Short-term investments	—			114.0			—		114.0
Deferred compensation plan asset	—			7.3			—		7.3
Total assets	$	29.5		$	354.2		$	1.0	$	384.7
FINANCIAL LIABILITIES:
Derivative Instruments (Non-Designated Hedges):
Aluminum - Fixed price purchase contracts	$	—		$	(4.2	)	$	—	$	(4.2	)
Natural Gas - Fixed price purchase contracts	—			(6.2		)	—		(6.2		)
Electricity - Fixed price purchase contracts	—			(1.7		)	—		(1.7		)
Hedges Relating to the Convertible Notes - Bifurcated Conversion Feature	—			(84.7		)	—		(84.7		)
All Other Financial Liabilities:
Senior Notes	(244.5		)	—			—		(244.5		)
Convertible Notes, including Bifurcated Conversion Feature	(263.3		)	—			—		(263.3		)
Total liabilities	$	(507.8	)	$	(96.8	)	$	—	$	(604.6	)

Financial instruments classified as Level 3 in the fair value hierarchy represent Midwest premium swap contracts for which at least one significant unobservable input in the valuation model is a management estimate. This is necessary due to the lack of an exchange traded product with observable market pricing data. Fair value was determined using a forward curve based on the average pricing quotes from our trading counterparties and applying a discount factor based on the risk free interest rate.

The following table presents quantitative information for Level 3 Midwest premium derivative contracts:

	Fair Value at September 30, 2015 (in millions of dollars)			Valuation technique	Unobservable input	Range ($ in unit price)
Assets:
Midwest premium contracts	$	0.1		Discounted fair value	Forward price curve	$0.070 per metric ton in Oct 2015 to $0.063 per metric ton in Dec 2016
Liabilities:
Midwest premium contracts	$	(2.0	)	Discounted fair value	Forward price curve	$0.070 per metric ton in Oct 2015 to $0.063 per metric ton in Dec 2016

The following table presents a reconciliation of activity for the Midwest premium derivative contracts on a net basis (in millions of dollars):

	Level 3
Balance at December 31, 2014	$	1.0
Total realized/unrealized losses included in:
Cost of goods sold excluding depreciation and amortization and other items and Unrealized losses on derivative instruments	(3.9		)
Transactions involving Level 3 derivative contracts:
Purchases	(5.4		)
Sales	—
Issuances	—
Settlements	6.4
Transactions involving Level 3 derivatives — net	1.0
Transfers in and/or out of Level 3 valuation hierarchy	—
Balance at September 30, 2015	$	(1.9	)
Total losses included in Unrealized losses on derivative instruments, attributable to the change in unrealized gains/losses relating to derivative contracts held at September 30, 2015:	$	(2.0	)

Fair Values of Non-Financial Assets and Liabilities

We concluded that none of our non-financial assets and liabilities subject to fair value assessments on a non-recurring basis required a material adjustment to the carrying amount of such assets and liabilities for the nine months endedSeptember 30, 2015 and September 30, 2014.

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Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2015	Oct. 19, 2015
Document Information [Line Items]
Entity Registrant Name	Kaiser Aluminum Corp
Entity Central Index Key	0000811596
Document Type	10-Q
Document Period End Date	Sep. 30, 2015
Amendment Flag	false
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		17,739,189

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Earnings Per Share

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Earnings Per Share

Per Share

Basic and diluted net income (loss) per share were calculated as follows, for each period presented (in millions of dollars, except share and per share amounts):

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015			2014
Numerator:
Net income (loss)	$	22.1	$	15.9	$	(249.9	)	$	56.2
Denominator - Weighted-average common shares outstanding (in thousands):
Basic1	17,123		17,707		17,178			17,853
Add: dilutive effect of non-vested common shares, restricted stock units and performance shares	305		134		—			143
Add: dilutive effect of warrants	744		778		—			596
Diluted2	18,172		18,619		17,178			18,592
Net income (loss) per common share, Basic:	$	1.29	$	0.90	$	(14.55	)	$	3.15
Net income (loss) per common share, Diluted:	$	1.21	$	0.85	$	(14.55	)	$	3.02

______________________

¹  The basic weighted-average number of common shares outstanding during the periods presented excludes non-vested common shares, restricted stock units and performance shares.

²  The diluted weighted-average number of common shares outstanding during the periods presented was calculated using the treasury method.

Warrants relating to approximately 1.7 million notional common shares (with an exercise price of approximately $60.32 per share) and 3.7 million notional common shares (with an exercise price of approximately $60.80 per share) were outstanding as of September 30, 2015 and September 30, 2014, respectively. Upon settlement, each Warrant holder receives a number of shares of our common stock equal to (a) the number of notional shares associated with each Warrant settling on such date multiplied by (b)(i) the excess (if any) of the volume weighted average price of our common stock on each exercise date over the then effective strike price of the Warrants divided by (ii) such volume-weighted average price of our common stock. Warrant holders receive cash in lieu of fractional shares. The Warrants began settling ratably over the 120 trading day period beginning on July 1, 2015. During the quarter ended September 30, 2015, 516,220 shares of our common stock were issued upon settlement of Warrants relating to approximately 2.0 million notional common shares, leaving Warrants relating to approximately 1.7 million notional shares outstanding as of September 30, 2015 to be settled during the following quarter. If the Warrants relating to 1.7 million notional shares had all been settled on September 30, 2015, the number of shares issued using our average stock price for the quarter ended September 30, 2015 would have been 473,850. As of September 30, 2014, if the Warrants then outstanding relating to 3.7 million notional shares had all been settled, the number of our common shares issued using our average stock price for the quarter September 30, 2014 would have been 778,147. See Note 3 and Note 16 for additional information relating to the Warrants.

The following securities were excluded from the weighted-average diluted shares computation for the quarters and nine months endedSeptember 30, 2015 and September 30, 2014 as their inclusion would have been anti-dilutive (in thousands of shares):

	Quarter Ended		Nine Months Ended
	September 30,		September 30,
	2015	2014	2015	2014
Options to purchase common shares	—	20	17	20
Non-vested common shares, restricted stock units and performance shares	—	56	281	48
Warrants	—	—	773	—
Total excluded	—	76	1,071	68

During the nine months endedSeptember 30, 2015 and September 30, 2014, we paid a total of approximately $21.0 million ($1.20 per common share) and $19.1 million ($1.05 per common share), respectively, in cash dividends to stockholders, including the holders of restricted stock, and dividend equivalents to the holders of certain restricted stock units and to the holders of performance shares granted prior to 2014 with respect to the target number of underlying common shares (constituting approximately one-half of the maximum payout).

From time to time, we repurchase shares pursuant to a stock repurchase program authorized by our Board of Directors. Repurchase transactions will occur at such times and prices as management deems appropriate and will be funded with our excess liquidity after giving consideration to internal and external growth opportunities and future cash flows. Repurchases may be in open-market transactions or in privately negotiated transactions, and the program may be modified or terminated by our Board of Directors at any time.

During the nine months endedSeptember 30, 2015 and September 30, 2014, we repurchased 599,397 shares of common stock (at a weighted-average price of $75.81 per share) and 410,589 shares of common stock (at a weighted-average price of $70.34 per share), respectively, pursuant to the stock repurchase program. The total cost of $45.4 million and $28.9 million was recorded as Treasury stock during the nine months endedSeptember 30, 2015 and September 30, 2014, respectively. At September 30, 2015, $127.3 million were available for the repurchase of our common shares under the stock repurchase program.

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Statements of Consolidated Income - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net sales	$ 336.4	$ 338.9	$ 1,075.3	$ 1,018.1
Cost of products sold:
Cost of products sold, excluding depreciation and amortization and other items	267.3	280.4	864.4	838.8
Unrealized losses on derivative instruments	1.7	3.6	7.7	0.0
Depreciation and amortization	8.1	8.0	24.2	23.1
Selling, general, administrative, research and development	21.1	19.0	67.4	61.3
(Gain) loss on removal of Union VEBA net assets – Note 5	0.6	(6.0)	1.8	(17.7)
Gain on removal of Union VEBA net assets	(2.9)	0.0	490.9	0.0
Total selling, general, administrative, research and development	18.8	13.0	560.1	43.6
Other operating charges, net	0.0	1.3	0.0	1.5
Total costs and expenses	295.9	306.3	1,456.4	907.0
Operating income (loss)	40.5	32.6	(381.1)	111.1
Other (expense) income:
Interest expense	(4.9)	(9.7)	(19.9)	(27.7)
Other (expense) income, net – Note 13	(0.9)	2.2	(0.1)	5.9
Income (loss) before income taxes	34.7	25.1	(401.1)	89.3
Income tax (provision) benefit	(12.6)	(9.2)	151.2	(33.1)
Net income (loss)	$ 22.1	$ 15.9	$ (249.9)	$ 56.2
Net income (loss) per common share:
Basic	$ 1.29	$ 0.90	$ (14.55)	$ 3.15
Diluted	$ 1.21	$ 0.85	$ (14.55)	$ 3.02
Weighted-average number of common shares outstanding (in thousands):
Basic	17,123	17,707	17,178	17,853
Diluted	18,172	18,619	17,178	18,592
Common Stock, Dividends, Per Share, Declared	$ 0.40	$ 0.35	$ 1.20	$ 1.05

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Income Tax Matters

9 Months Ended

Sep. 30, 2015

Income Tax Disclosure [Abstract]

Income Tax Matters

Income Tax Matters

The provision for (benefit from) incomes taxes for each period presented consisted of the following (in millions of dollars):

	Quarter Ended					Nine Months Ended
	September 30,					September 30,
	2015			2014		2015			2014
Domestic	$	13.4		$	9.2	$	(149.0	)	$	32.2
Foreign	(0.8		)	—		(2.2		)	0.9
Total	$	12.6		$	9.2	$	(151.2	)	$	33.1

The income tax (benefit) provision for the quarters ended September 30, 2015 and September 30, 2014 was $12.6 million and $9.2 million, reflecting an effective tax rate of 36.3% and 36.7%, respectively. There was no material difference between the effective tax rate and the projected blended statutory tax rate for the quarters ended September 30, 2015 and September 30, 2014.

The income tax (benefit) provision for the nine months endedSeptember 30, 2015 and September 30, 2014 was $(151.2) million and $33.1 million, reflecting an effective tax rate of 37.7% and 37.0%, respectively. There was no material difference between the effective tax rate and the projected blended statutory tax rate for the nine months endedSeptember 30, 2015 and September 30, 2014.

The $(151.2) million income tax benefit for the nine months endedSeptember 30, 2015 included a $184.4 million tax benefit that was recorded as a result of removing the Union VEBA net assets and related deferred tax liabilities from our consolidated financial statements.

See Note 5 for disclosure regarding employee benefits.

Our gross unrecognized benefits relating to uncertain tax positions were $1.6 million and $2.2 million at September 30, 2015 and December 31, 2014, respectively, of which, $0.5 million and $1.1 million would go through our income tax provision and thus impact the effective tax rate at September 30, 2015 and December 31, 2014, respectively, if the gross unrecognized tax benefits were to be recognized.

We do not expect our gross unrecognized tax benefits to significantly change within the next 12 months.

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Long-Term Debt and Credit Facility

9 Months Ended

Sep. 30, 2015

Debt Disclosure [Abstract]

Long-Term Debt

Debt and Credit Facility

Senior Notes

In May 2012, we issued $225.0 million principal amount of 8.25% unsecured senior notes due June 1, 2020 ("Senior Notes") at 100% of the principal amount. Interest expense, including amortization of deferred financing costs, relating to the Senior Notes was $4.8 million and $14.5 million for the quarter and nine months endedSeptember 30, 2015, respectively. Interest expense, including amortization of deferred financing costs, relating to the Senior Notes were $4.8 million and $14.5 million for the quarter and nine months endedSeptember 30, 2014, respectively. A portion of the interest relating to the Senior Notes was capitalized as construction in progress.

During the quarter ended September 30, 2015, we repurchased $6.1 million aggregate principal amount of our Senior Notes for 107.5% of the face value plus an insignificant amount of accrued interest, resulting in a loss of $0.6 million recognized within Other income, net on our statements of consolidated income (loss). As of September 30, 2015, $218.9 million aggregate principal amount of our Senior Notes remained outstanding. See Note 16 for information regarding additional Senior Notes repurchases made between October 1, 2015 through October 19, 2015.

Cash Convertible Senior Notes

Convertible Notes. In March 2010, we issued $175.0 million principal amount of 4.50% unsecured Cash Convertible Senior Notes due April 1, 2015 ("Convertible Notes"). We accounted for the cash conversion feature of the Convertible Notes as a separate derivative instrument ("Bifurcated Conversion Feature") with the fair value on the issuance date equaling the original issuance discount for purposes of accounting for the debt component of the Convertible Notes. At December 31, 2014, the carrying amount of the Convertible Notes, net of discount, was $172.5 million, of which $2.5 million was unamortized issuance discount.

The following table provides additional information regarding the Convertible Notes (in millions of dollars):

	Quarter Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Contractual coupon interest	$	—	$	2.0	$	2.0	$	5.9
Amortization of discount	—		2.3		2.4		6.7
Amortization of deferred financing costs	—		0.3		0.3		0.9
Total interest expense1	$	—	$	4.6	$	4.7	$	13.5

____________

¹  A portion of the interest relating to the Convertible Notes was capitalized as construction in progress.

Substantially all of the Convertible Notes were presented for conversion during the quarter ended March 31, 2015 and were settled in cash on April 1, 2015. The conversion value of 154.261% of par was determined over the final settlement period of 50 consecutive trading days that ended on March 27, 2015, resulting in a total payment amount to settle the Convertible Notes on April 1, 2015 of $273.8 million, comprised of a final coupon payment of $3.9 million, principal of $175.0 million and conversion premium of $94.9 million.

Convertible Notes Hedge Transactions. In connection with the issuance of our Convertible Notes, we entered into privately negotiated transactions whereby we purchased cash-settled call options ("Option Assets") relating to shares of our common stock that settled contemporaneously with the Convertible Notes. On April 1, 2015, we received Option Asset settlement proceeds of $94.9 million, which equaled the aggregate amount of cash that we paid to the holders of the converted Convertible Notes, less the principal amount thereof and interest payable thereon. Accordingly, the net cash outflow to settle our Convertible Notes and Option Assets on April 1, 2015 was $178.9 million.

Contemporaneous with the issuance of the Convertible Notes and our purchase of the Option Assets in 2010, we sold net-share-settled warrants ("Warrants") relating to approximately 3.7 million notional shares of our common stock. Beginning on July 1, 2015, the Warrants commenced settling ratably over the subsequent 120 trading day period. We delivered to the Warrant holders a number of shares for each Warrant according to the formula discussed in Note 10. As of September 30, 2015, after reflecting cumulative anti-dilution adjustments for payment of quarterly dividends paid in excess of $0.24 per share, the exercise price of the Warrants was $60.32 per share. See Note 10 and Note 16 for additional information relating to the settlement of our Warrants.

See "Fair Values of Financial Assets and Liabilities - All Other Financial Assets and Liabilities" in Note 9 for information relating to the estimated fair value of the Senior Notes, Convertible Notes, Bifurcated Conversion Feature and Option Assets.

Revolving Credit Facility

Our credit agreement with JPMorgan Chase Bank, N.A., as administrative agent, and the other financial institutions party thereto ("Revolving Credit Facility") provides us with a $300.0 million funding commitment through September 2016. We had $246.5 million of borrowing availability under the Revolving Credit Facility at September 30, 2015, based on the borrowing base determination then in effect. At September 30, 2015, there were no borrowings under the Revolving Credit Facility and $7.4 million was being used to support outstanding letters of credit, leaving $239.1 million of net borrowing availability. The interest rate applicable to any overnight borrowings under the Revolving Credit Facility would have been 4.0% at September 30, 2015.

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Guarantor and Non-Guarantor Financial Statements (Notes)

9 Months Ended

Sep. 30, 2015

Guarantor and Non-Guarantor Financial Statement [Abstract]

Guarantor and Non-Guarantor Financial Statements

Condensed Guarantor and Non-Guarantor Financial Information

We issued $225.0 million aggregate principal amount of our Senior Notes, of which $218.9 million aggregate principal amount remained outstanding as of September 30, 2015, pursuant to an indenture dated May 23, 2012 ("Indenture"), among Kaiser Aluminum Corporation ("Parent"), the subsidiary guarantors party thereto ("Guarantor Subsidiaries") and Wells Fargo Bank, National Association, as trustee ("Trustee"). The Guarantor Subsidiaries currently include Kaiser Aluminum Investments Company, Kaiser Aluminum Fabricated Products, LLC, Kaiser Aluminum Mill Products, Inc., Kaiser Aluminum Washington, LLC and Kaiser Aluminum Alexco, LLC, all of which are 100% owned by the Parent. The guarantees are full and unconditional and joint and several but have customary releases in the following situations: (i) the sale of the Guarantor Subsidiary or all of its assets; (ii) the declaration of a Guarantor Subsidiary as an unrestricted subsidiary under the Indenture; (iii) the termination or release of the Guarantor Subsidiary’s guarantee of certain other indebtedness; or (iv) our exercise of legal defeasance or covenant defeasance or the discharge of our obligations under the Indenture.

The following condensed consolidating financial information as of September 30, 2015 and December 31, 2014, and for the quarters and nine months endedSeptember 30, 2015 and September 30, 2014present (i) the financial position, results of operation and cash flows for each of (a) the Parent, (b) the Guarantor Subsidiaries on a combined basis and (c) the Non-Guarantor Subsidiaries (as defined below) on a combined basis; (ii) the adjustments necessary to eliminate investments in subsidiaries and intercompany balances and transactions among Parent, the Guarantor Subsidiaries and the Non-Guarantor Subsidiaries; and (iii) the resulting totals, reflecting our information on a consolidated basis, as reported. In the following tables, "Non-Guarantor Subsidiaries" refers to Kaiser Aluminum Canada Limited, Trochus Insurance Company, DCO Management, LLC, Kaiser Aluminum France, S.A.S. and Kaiser Aluminum Beijing Trading Company; and "Consolidating Adjustments" represent the adjustments necessary to eliminate the investments in our subsidiaries and other intercompany sales and cost of sales transactions. The condensed consolidating financial information should be read in conjunction with the consolidated financial statements herein.

CONDENSED CONSOLIDATING BALANCE SHEET

(In millions of dollars)

September 30, 2015

	Parent		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Consolidating Adjustments			Consolidated
ASSETS
Current assets:
Cash and cash equivalents	$	—	$	79.6	$	3.0	$	—		$	82.6
Short-term investments	—		30.0		—		—			30.0
Receivables:
Trade receivables — net	—		127.8		3.8		—			131.6
Intercompany receivables	29.2		96.8		2.6		(128.6		)	—
Other	—		2.1		2.3		—			4.4
Inventories	—		213.7		6.0		(2.4		)	217.3
Prepaid expenses and other current assets	0.1		98.1		1.3		(0.9		)	98.6
Total current assets	29.3		648.1		19.0		(131.9		)	564.5
Investments in and advances to subsidiaries	1,057.2		32.3		—		(1,089.5		)	—
Property, plant and equipment — net	—		444.2		28.5		—			472.7
Long-term intercompany receivables	—		—		2.4		(2.4		)	—
Deferred tax assets — net	—		128.6		—		7.1			135.7
Intangible assets — net	—		30.9		—		—			30.9
Goodwill	—		37.2		—		—			37.2
Other assets	3.7		18.3		0.1		—			22.1
Total	$	1,090.2	$	1,339.6	$	50.0	$	(1,216.7	)	$	1,263.1
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	0.7	$	64.1	$	4.5	$	—		$	69.3
Intercompany payable	92.3		42.6		3.8		(138.7		)	—
Accrued salaries, wages and related expenses	—		35.5		2.9		—			38.4
Other accrued liabilities	6.0		55.6		0.7		(0.9		)	61.4
Short-term capital lease	—		0.1		—		—			0.1
Total current liabilities	99.0		197.9		11.9		(139.6		)	169.2
Net liabilities of Salaried VEBA	—		15.9		—		—			15.9
Deferred tax liabilities	—		—		0.8		—			0.8
Long-term intercompany payable	—		2.4		—		(2.4		)	—
Long-term liabilities	—		80.9		5.1		—			86.0
Long-term debt	218.9		—		—		—			218.9
Total liabilities	317.9		297.1		17.8		(142.0		)	490.8
Total stockholders’ equity	772.3		1,042.5		32.2		(1,074.7		)	772.3
Total	$	1,090.2	$	1,339.6	$	50.0	$	(1,216.7	)	$	1,263.1

CONDENSED CONSOLIDATING BALANCE SHEET

(In millions of dollars)

December 31, 2014

	Parent		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Consolidating Adjustments			Consolidated
ASSETS
Current assets:
Cash and cash equivalents	$	—	$	175.3	$	2.4	$	—		$	177.7
Short-term investments	—		114.0		—		—			114.0
Receivables:
Trade receivables — net	—		126.1		3.2		—			129.3
Intercompany receivables	204.2		4.0		0.9		(209.1		)	—
Other	—		5.6		5.3		—			10.9
Inventories	—		208.0		7.6		(0.9		)	214.7
Prepaid expenses and other current assets	85.1		93.1		0.4		—			178.6
Total current assets	289.3		726.1		19.8		(210.0		)	825.2
Investments in and advances to subsidiaries	1,209.2		32.5		—		(1,241.7		)	—
Property, plant and equipment — net	—		437.4		17.5		—			454.9
Long-term intercompany receivables	—		—		15.9		(15.9		)	—
Net assets of Union VEBA	—		340.1		—		—			340.1
Deferred tax assets — net	—		23.8		—		7.1			30.9
Intangible assets — net	—		32.1		—		—			32.1
Goodwill	—		37.2		—		—			37.2
Other assets	4.4		18.8		0.1		—			23.3
Total	$	1,502.9	$	1,648.0	$	53.3	$	(1,460.5	)	$	1,743.7
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	1.3	$	73.8	$	6.3	$	—		$	81.4
Intercompany payable	—		221.3		3.3		(224.6		)	—
Accrued salaries, wages and related expenses	—		36.5		3.1		—			39.6
Other accrued liabilities	88.2		43.8		0.8		—			132.8
Current portion of long-term debt	172.5		—		—		—			172.5
Short-term capital lease	—		0.1		—		—			0.1
Total current liabilities	262.0		375.5		13.5		(224.6		)	426.4
Net liabilities of Salaried VEBA	—		17.2		—		—			17.2
Deferred tax liabilities	—		—		0.9		—			0.9
Long-term intercompany payable	—		15.9		—		(15.9		)	—
Long-term liabilities	—		50.3		8.0		—			58.3
Long-term debt	225.0		—		—		—			225.0
Total liabilities	487.0		458.9		22.4		(240.5		)	727.8
Total stockholders’ equity	1,015.9		1,189.1		30.9		(1,220.0		)	1,015.9
Total	$	1,502.9	$	1,648.0	$	53.3	$	(1,460.5	)	$	1,743.7

CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME (LOSS)

(In millions of dollars)

Quarter Ended September 30, 2015

	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
Net sales	$	—		$	329.5		$	29.4		$	(22.5	)	$	336.4
Costs and expenses:
Cost of products sold:
Cost of products sold, excluding depreciation and amortization and other items	—			263.1			25.3			(21.1		)	267.3
Unrealized losses on derivative instruments	—			1.7			—			—			1.7
Depreciation and amortization	—			7.8			0.3			—			8.1
Selling, general, administrative, research and development:
Selling, general, administrative, research and development	0.9			18.4			2.4			(0.6		)	21.1
Net periodic postretirement benefit cost relating to Salaried VEBA	—			0.6			—			—			0.6
Gain on removal of Union VEBA net assets	—			(2.9		)	—			—			(2.9		)
Total selling, general, administrative, research and development	0.9			16.1			2.4			(0.6		)	18.8
Total costs and expenses	0.9			288.7			28.0			(21.7		)	295.9
Operating (loss) income	(0.9		)	40.8			1.4			(0.8		)	40.5
Other (expense) income:
Interest expense	(4.7		)	(0.3		)	—			0.1			(4.9		)
Other (expense) income, net	(0.6		)	2.2			(2.4		)	(0.1		)	(0.9		)
(Loss) income before income taxes	(6.2		)	42.7			(1.0		)	(0.8		)	34.7
Income tax (provision) benefit	—			(15.6		)	0.8			2.2			(12.6		)
Earnings (loss) in equity of subsidiaries	28.3			(1.0		)	—			(27.3		)	—
Net income (loss)	$	22.1		$	26.1		$	(0.2	)	$	(25.9	)	$	22.1
Comprehensive income (loss)	$	22.2		$	26.5		$	(0.5	)	$	(26.0	)	$	22.2

CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE (LOSS) INCOME

(In millions of dollars)

Nine Months Ended September 30, 2015

	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
Net sales	$	—		$	1,051.2		$	97.6		$	(73.5	)	$	1,075.3
Costs and expenses:
Cost of products sold:
Cost of products sold, excluding depreciation and amortization and other items	—			848.9			85.8			(70.3		)	864.4
Unrealized loss on derivative instruments	—			7.7			—			—			7.7
Depreciation and amortization	—			23.3			0.9			—			24.2
Selling, general, administrative, research and development:
Selling, general, administrative, research and development	3.3			58.6			7.2			(1.7		)	67.4
Net periodic postretirement benefit cost relating to Salaried VEBA	—			1.8			—			—			1.8
Loss on removal of Union VEBA net assets	—			490.9			—			—			490.9
Total selling, general, administrative, research and development	3.3			551.3			7.2			(1.7		)	560.1
Total costs and expenses	3.3			1,431.2			93.9			(72.0		)	1,456.4
Operating (loss) income	(3.3		)	(380.0		)	3.7			(1.5		)	(381.1		)
Other (expense) income:
Interest expense	(19.1		)	(1.1		)	—			0.3			(19.9		)
Other (expense) income, net	(0.6		)	3.0			(2.2		)	(0.3		)	(0.1		)
(Loss) income before income taxes	(23.0		)	(378.1		)	1.5			(1.5		)	(401.1		)
Income tax benefit	—			140.5			2.2			8.5			151.2
(Loss) earnings in equity of subsidiaries	(226.9		)	2.2			—			224.7			—
Net (loss) income	$	(249.9	)	$	(235.4	)	$	3.7		$	231.7		$	(249.9	)
Comprehensive (loss) income	$	(182.5	)	$	(167.8	)	$	3.5		$	164.3		$	(182.5	)

CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME

(In millions of dollars)

Quarter Ended September 30, 2014

	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
Net sales	$	—		$	330.3		$	33.6		$	(25.0	)	$	338.9
Costs and expenses:
Cost of products sold:
Cost of products sold, excluding depreciation and amortization and other items	—			274.7			29.8			(24.1		)	280.4
Unrealized gains on derivative instruments	—			3.6			—			—			3.6
Depreciation and amortization	—			7.7			0.3			—			8.0
Selling, general, administrative, research and development:
Selling, general, administrative, research and development	0.9			17.2			1.7			(0.8		)	19.0
Net periodic postretirement benefit income relating to VEBAs	—			(6.0		)	—			—			(6.0		)
Total selling, general, administrative, research and development	0.9			11.2			1.7			(0.8		)	13.0
Other operating charges, net	—			1.3			—			—			1.3
Total costs and expenses	0.9			298.5			31.8			(24.9		)	306.3
Operating (loss) income	(0.9		)	31.8			1.8			(0.1		)	32.6
Other (expense) income:
Interest expense	(9.4		)	(0.5		)	—			0.2			(9.7		)
Other income (expense), net	2.2			0.3			(0.1		)	(0.2		)	2.2
(Loss) income before income taxes	(8.1		)	31.6			1.7			(0.1		)	25.1
Income tax (provision) benefit	—			(11.9		)	(0.1		)	2.8			(9.2		)
Earnings in equity of subsidiaries	24.0			1.6			—			(25.6		)	—
Net income	$	15.9		$	21.3		$	1.6		$	(22.9	)	$	15.9
Comprehensive income	$	17.2		$	22.5		$	1.7		$	(24.2	)	$	17.2

CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME

(In millions of dollars)

Nine Months Ended September 30, 2014

	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
Net sales	$	—		$	993.1		$	100.7		$	(75.7	)	$	1,018.1
Costs and expenses:
Cost of products sold:
Cost of products sold, excluding depreciation and amortization and other items	—			824.4			87.9			(73.5		)	838.8
Unrealized gains on derivative instruments	—			—			—			—			—
Depreciation and amortization	—			22.3			0.8			—			23.1
Selling, general, administrative, research and development:
Selling, general, administrative, research and development	3.1			52.3			7.9			(2.0		)	61.3
Net periodic postretirement benefit income relating to VEBAs	—			(17.7		)	—			—			(17.7		)
Total selling, general, administrative, research and development	3.1			34.6			7.9			(2.0		)	43.6
Other operating charges, net	—			1.5			—			—			1.5
Total costs and expenses	3.1			882.8			96.6			(75.5		)	907.0
Operating (loss) income	(3.1		)	110.3			4.1			(0.2		)	111.1
Other (expense) income:
Interest expense	(28.0		)	(0.1		)	—			0.4			(27.7		)
Other income, net	3.6			2.3			0.4			(0.4		)	5.9
(Loss) income before income taxes	(27.5		)	112.5			4.5			(0.2		)	89.3
Income tax (provision) benefit	—			(42.3		)	(0.9		)	10.1			(33.1		)
Earnings in equity of subsidiaries	83.7			3.4			—			(87.1		)	—
Net income	$	56.2		$	73.6		$	3.6		$	(77.2	)	$	56.2
Comprehensive income	$	60.5		$	77.7		$	3.8		$	(81.5	)	$	60.5

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

(In millions of dollars)

Nine Months Ended September 30, 2015

	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating Adjustments		Consolidated
Cash flows from operating activities:
Net cash provided by (used in) operating activities	$	250.2		$	(140.8	)	$	(0.5	)	$	—	$	108.9
Cash flows from investing activities:
Capital expenditures	—			(26.0		)	(12.4		)	—		(38.4		)
Purchase of available for sale securities	—			(0.5		)	—			—		(0.5		)
Proceeds from disposition of available for sale securities	—			84.0			—			—		84.0
Net cash provided by (used in) investing activities	—			57.5			(12.4		)	—		45.1
Cash flows from financing activities:
Repurchase of Senior Notes	(6.1		)	—			—			—		(6.1		)
Settlement of Convertible Notes	(175.0		)	—			—			—		(175.0		)
Proceeds from cash-settled call options related to settlement of Convertible Notes	94.9			—			—			—		94.9
Payment for conversion premium related to settlement of Convertible Notes	(94.9		)	—			—			—		(94.9		)
Excess tax benefit upon vesting of non-vested shares and dividend payment on unvested shares expected to vest	—			1.1			—			—		1.1
Cancellation of shares to cover employees’ tax withholdings upon vesting of non-vested shares	(3.0		)	—			—			—		(3.0		)
Repurchase of common stock	(45.1		)	—			—			—		(45.1		)
Cash dividend paid to stockholders	(21.0		)	—			—			—		(21.0		)
Intercompany loan	—			(13.5		)	13.5			—		—
Net cash (used in) provided by financing activities	(250.2		)	(12.4		)	13.5			—		(249.1		)
Net (decrease) increase in cash and cash equivalents during the period	—			(95.7		)	0.6			—		(95.1		)
Cash and cash equivalents at beginning of period	—			175.3			2.4			—		177.7
Cash and cash equivalents at end of period	$	—		$	79.6		$	3.0		$	—	$	82.6

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

(In millions of dollars)

Nine Months Ended September 30, 2014

	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating Adjustments		Consolidated
Cash flows from operating activities:
Net cash provided by operating activities	$	13.9		$	82.7		$	7.1		$	—	$	103.7
Cash flows from investing activities:
Capital expenditures	—			(38.1		)	(1.5		)	—		(39.6		)
Purchase of available for sale securities	—			(53.4		)	—			—		(53.4		)
Proceeds from disposition of available for sale securities	—			82.2			—			—		82.2
Change in restricted cash	—			(0.7		)	—			—		(0.7		)
Net cash used in investing activities	—			(10.0		)	(1.5		)	—		(11.5		)
Cash flows from financing activities:
Excess tax benefit upon vesting of non-vested shares and dividend payment on unvested shares expected to vest	—			0.8			—			—		0.8
Cancellation of shares to cover employees’ tax withholdings upon vesting of non-vested shares	(2.4		)	—			—			—		(2.4		)
Repurchase of common stock	(28.7		)	—			—			—		(28.7		)
Cash dividend paid to stockholders	(19.1		)	—			—			—		(19.1		)
Intercompany loan	31.3			(22.6		)	(8.7		)	—		—
Net cash used in financing activities	(18.9		)	(21.8		)	(8.7		)	—		(49.4		)
Net increase (decrease) in cash and cash equivalents during the period	(5.0		)	50.9			(3.1		)	—		42.8
Cash and cash equivalents at beginning of period	5.0			157.7			6.8			—		169.5
Cash and cash equivalents at end of period	$	—		$	208.6		$	3.7		$	—	$	212.3

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Segment Information

9 Months Ended

Sep. 30, 2015

Segment Reporting [Abstract]

Segment and Geographical Area Information

Segment and Geographical Area Information

Our primary line of business is the production of semi-fabricated specialty aluminum products for the following end market applications: aerospace and high strength products ("Aero/HS products"); extrusions for automotive applications ("Automotive Extrusions"); general engineering products ("GE products"); and other industrial products ("Other products"). We operate 11 focused production facilities in the United States and one in Canada. Consistent with the manner in which our chief operating decision maker reviews and evaluates our business, the Fabricated Products business is treated as a single operating segment.

In addition to the Fabricated Products segment, we have a business unit, All Other, which provides general and administrative support for our operations. For purposes of segment reporting under GAAP, we treat the Fabricated Products segment as a reportable segment. All Other is not considered a reportable segment.

The accounting policies of the Fabricated Products segment are the same as those described in Note 1. Segment results are evaluated internally by management before any allocation of corporate overhead and without any charge for income taxes, interest expense, or other net operating charges.

The following tables provide financial information by reporting segment and business unit for each period or as of each period-end, as applicable (in millions of dollars):

	Quarter Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Net sales:
Fabricated Products	$	336.4		$	338.9		$	1,075.3		$	1,018.1
Segment operating income (loss):
Fabricated Products1	$	47.3		$	35.6		$	142.8		$	121.2
All Other2	(6.8		)	(3.0		)	(523.9		)	(10.1		)
Total operating income (loss)	$	40.5		$	32.6		$	(381.1	)	$	111.1
Interest expense	(4.9		)	(9.7		)	(19.9		)	(27.7		)
Other (expense) income, net	(0.9		)	2.2			(0.1		)	5.9
Income (loss) before income taxes	$	34.7		$	25.1		$	(401.1	)	$	89.3
Depreciation and amortization:
Fabricated Products	$	7.9		$	7.8		$	23.8		$	22.7
All Other	0.2			0.2			0.4			0.4
Total depreciation and amortization	$	8.1		$	8.0		$	24.2		$	23.1
Capital expenditures:
Fabricated Products	$	15.1		$	9.3		$	37.8		$	38.8
All Other	0.4			0.2			0.6			0.8
Total capital expenditures	$	15.5		$	9.5		$	38.4		$	39.6

_____________________

¹  Fabricated Products segment operating income included non-cash mark-to-market losses on primary aluminum, natural gas, electricity and foreign currency hedging activities, which totaled $1.7 million and $3.5 million for the quarters ended September 30, 2015 and September 30, 2014, respectively. There was a $7.7 million non-cash mark-to-market loss on primary aluminum, natural gas, electricity and foreign currency hedging activities for the nine months endedSeptember 30, 2015 and none for the nine months endedSeptember 30, 2014. For further discussion regarding mark-to-market matters, see Note 8.

²  Operating loss in All Other included Net periodic postretirement benefit cost (income) of $0.6 million and $(6.0) million for the quarters ended September 30, 2015 and September 30, 2014, respectively, and $1.8 million and $(17.7) million for the nine months endedSeptember 30, 2015 and September 30, 2014, respectively. Additionally, operating loss in All Other included (gain) loss on removal of Union VEBA net assets of $(2.9) million and $490.9 million during the quarter and nine months endedSeptember 30, 2015, respectively. See Note 5 for further details.

	September 30, 2015		December 31, 2014
Assets:
Fabricated Products	$	897.3	$	878.9
All Other1	365.8		864.8
Total assets	$	1,263.1	$	1,743.7

_____________________

¹  Assets in All Other represent primarily all of our cash and cash equivalents, short-term investments, financial derivative assets, net assets of VEBAs (see Note 5 and Note 9) and net deferred income tax assets.

Net sales by product categories based on end market applications for the Fabricated Products segment were as follows (in millions of dollars):

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Net sales:
Aero/HS products	$	170.0	$	172.5	$	531.4	$	509.1
Automotive Extrusions	49.5		44.0		153.3		129.5
GE products	100.4		103.6		331.5		323.1
Other products	16.5		18.8		59.1		56.4
Total net sales	$	336.4	$	338.9	$	1,075.3	$	1,018.1

Geographic information for income taxes paid were as follows (in millions of dollars):

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Income taxes paid:
Fabricated Products —
United States	$	0.1	$	1.4	$	0.4	$	1.6
Canada	0.2		0.2		1.5		1.1
Total income taxes paid	$	0.3	$	1.6	$	1.9	$	2.7

The aggregate foreign currency transaction gains (losses) included in determining net income were immaterial for the quarters and nine months endedSeptember 30, 2015 and September 30, 2014.

For both quarters ended September 30, 2015 and September 30, 2014, one customer represented 25% of Fabricated Products Net sales. For the nine months endedSeptember 30, 2015 and September 30, 2014, one customer represented 25% and 26%, respectively, of Fabricated Products Net sales. No other individual customer accounted for more than 10% of Fabricated Products Net sales during the quarters and nine months endedSeptember 30, 2015 and September 30, 2014.

At September 30, 2015, one customer represented 17% and no other individual customers accounted for 10% or more of the trade receivables balance. Two individual customers accounted for 10% and 12% of the trade receivables balance at December 31, 2014. 

Information for contractual delivery of our primary aluminum supply from our major suppliers were as follows:

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Percentage of total annual primary aluminum supply (lbs):
Supply from the Company's top five major suppliers	84	%	82	%	86	%	79	%
Supply from the Company's largest supplier	28	%	31	%	28	%	30	%
Supply from the Company's second and third largest suppliers	45	%	34	%	36	%	32	%

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2015

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Commitments. We have a variety of financial commitments, including purchase agreements, forward foreign exchange and forward sales contracts, indebtedness (and related Warrants) and letters of credit (see Note 3 and Note 8).

There were no material changes to our scheduled minimum rental commitments during the nine months endedSeptember 30, 2015. During the nine months endedSeptember 30, 2015, our contractual obligations for 2015 increased by $33.3 million, consisting of $26.2 million in raw material related purchase obligations and $7.1 million in firm commitments for equipment purchases. Additionally, our contractual obligations for 2016 and 2017 increased by $13.4 million and $6.7 million, respectively. The increase for 2016 consists of $6.5 million in raw material related purchase obligations, $5.3 million in firm commitments for equipment purchases and $1.6 million in firm commitments for energy purchases. The increase for 2017 consists of $0.5 million in raw material related purchase obligations, $0.1 million in firm commitments for equipment purchases and $6.1 million in firm commitments for energy purchases.

Environmental Contingencies. We are subject to a number of environmental laws and regulations, to potential fines or penalties assessed for alleged breaches of such laws and regulations and to potential claims based upon such laws and regulations.

We have established procedures for regularly evaluating environmental loss contingencies. Our environmental accruals represent our undiscounted estimate of costs reasonably expected to be incurred based on presently enacted laws and regulations, existing requirements, currently available facts, existing technology and our assessment of the likely remediation actions to be taken.

In 2012, we submitted a final feasibility study to the Washington State Department of Ecology ("Washington State Ecology") that included recommendations for remediation alternatives primarily to address the historical use of oils containing polychlorinated biphenyls, ("PCBs") at our Trentwood facility. We also signed an amended work order in 2012 with Washington State Ecology allowing certain remediation activities to begin the initiation of a treatability study in regards to proposed PCB remediation methods. We began implementation of certain approved sections of the work plan in 2013 and throughout 2014, completing a number of these sections in 2014. We continue to work with Washington State Ecology in developing the implementation plans for the remaining remediation activity as well as receiving final approval for the sections of the work plan completed to date. 

During 2013, at the request of the Ohio Environmental Protection Agency ("OEPA"), we initiated an investigational study of the Newark facility related to historical on-site waste disposal. During 2014, we completed a number of preliminary steps in the preparation of completing the final risk assessment and feasibility study, both of which are subject to review and approval by the OEPA. As this work continues and progresses to a risk assessment and feasibility study, we will establish and update the estimates for probable and estimable remediations, if any. The actual and final cost for remediation will not be fully determinable until a final feasibility study is submitted and accepted by the OEPA and work plans are prepared, which is expected to occur within the next 18 to 24 months.

At September 30, 2015, our environmental accrual of $18.8 million represented our estimate of the incremental remediation cost based on (i) proposed alternatives in the final feasibility study related to our Trentwood facility; (ii) currently available facts with respect to our Newark facility; and (iii) facts related to certain other locations owned or formerly owned by us. In accordance with approved and proposed remediation action plans, we expect that the implementation and ongoing monitoring could occur over a period of 30 or more years.

As additional facts are developed, feasibility studies are completed, draft remediation plans are modified, necessary regulatory approvals for the implementation of remediation are obtained, alternative technologies are developed, and/or other factors change, there may be revisions to management’s estimates and actual costs may exceed the current environmental accruals. We believe at this time that it is reasonably possible that undiscounted costs associated with these environmental matters may exceed current accruals by amounts that could be, in the aggregate, up to an estimated $24.7 million over the remediation period. It is reasonably possible that our recorded estimate may change in the next 12 months.

Other Contingencies. We are party to various lawsuits, claims, investigations and administrative proceedings that arise in connection with past and current operations. We evaluate such matters on a case-by-case basis, and our policy is to vigorously contest any such claims we believe are without merit. We accrue for a legal liability when it is both probable that a liability has been incurred and the amount of the loss is material and reasonably estimable. Quarterly, in addition to when changes in facts and circumstances require it, we review and adjust these accruals to reflect the impacts of negotiations, settlements, rulings, advice of legal counsel and other information and events pertaining to a particular case. While uncertainties are inherent in the final outcome of such matters and it is presently impossible to determine the actual cost that may ultimately be incurred, we believe that we have sufficiently accrued for such matters and that the ultimate resolution of pending matters will not have a material impact on our consolidated financial position, operating results, or liquidity.

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Fair Value Measurements Fair Value Measurements, Schedule of Quantitative Information for Level 3 Derivative Contracts (Details)	9 Months Ended
	Sep. 30, 2015 USD ($)
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Midwest Premium Swap Asset Beginning Curve Value	$ 0.070
Midwest Premium Swap Asset Ending Curve Value	0.063
Midwest Premium Swap Liability Ending Curve Value	0.063
Midwest Premium Swap Liability Beginning Curve Value	$ 0.070

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Employee Benefits

9 Months Ended

Sep. 30, 2015

Compensation and Retirement Disclosure [Abstract]

Employee Benefits

Employee Benefits

Pension and Similar Benefit Plans. We provide contributions to (i) multi-employer pension plans sponsored by the United Steel, Paper and Forestry, Rubber, Manufacturing, Energy, Allied Industrial and Service Workers International Union AFL-CIO, CLC ("USW") and the International Association of Machinists and certain other unions at certain of our production facilities; (ii) defined contribution 401(k) savings plans for hourly bargaining unit employees and salaried and certain hourly non-bargaining unit employees; (iii) a defined benefit plan for salaried employees at our London, Ontario (Canada) facility; and (iv) a non-qualified, unfunded, unsecured plan of deferred compensation for key employees who would otherwise suffer a loss of benefits under our defined contribution plan.

VEBA Postretirement Medical Obligations. Certain retirees, their surviving spouses and eligible dependents receive medical coverage through participation in a VEBA for the benefit of certain union retirees, their surviving spouses and eligible dependents ("Union VEBA") or a VEBA that provides benefits for certain other eligible retirees, their surviving spouses and eligible dependents ("Salaried VEBA" and, together with the Union VEBA, "VEBAs"). We have no claim to the assets of the VEBAs or any obligation to fund their liabilities. The benefits paid by the VEBAs to the plan participants are made at the sole discretion of the respective VEBA trustees and are outside our control. Our only financial obligations to the VEBAs are (i) an annual variable cash contribution (described in more detail below) and (ii) reimbursement of annual administrative expenses of the VEBAs up to $0.3 million in the aggregate. Nevertheless, we have historically accounted for each of the VEBAs, and continue to account for the Salaried VEBA, as a defined benefit postretirement plan with the maximum benefits payable capped at the aggregate of the current assets of the VEBAs and the estimated future variable contributions from us and earnings thereon.

Under this accounting treatment, the funding status of the VEBAs resulted in a liability or asset position on our Consolidated Balance Sheets, even though such liability or asset has no impact on our cash flow or liquidity. The only impact that the VEBAs have on our cash flow or liquidity is with respect to our obligations to make annual variable cash contributions and to reimburse a portion of the VEBAs’ administrative expenses. The amount of annual variable cash contribution to be made by us is determined as follows: 10% of the first $20.0 million of annual cash flow (as defined; in general terms, the principal elements of cash flow are earnings before interest expense, provision for income taxes and depreciation and amortization less cash payments for, among other things, interest, income taxes and capital expenditures), plus 20% of annual cash flow (as defined) in excess of $20.0 million. Such payments may not exceed $20.0 million annually, and payments are allocated between the Union VEBA and the Salaried VEBA at 85.5% and 14.5%, respectively. Amounts owing by us to the VEBAs are recorded on our Consolidated Balance Sheets at the end of each year in Other accrued liabilities (until paid in cash), with corresponding adjustments reflecting an increase in Net assets of VEBAs, a decrease in Net liabilities of VEBAs, or a combination thereof. The annual variable contributions with respect to 2014 and 2013 totaled $13.7 million and $16.0 million at December 31, 2014 and December 31, 2013, respectively and these contributions were made during the subsequent first quarters. The variable cash contribution obligation to the Union VEBA expires in September 2017, while the obligation to the Salaried VEBA has no express termination.

In January 2015, members of the USW at our Newark, Ohio ("Newark") and Spokane, Washington ("Trentwood") facilities ratified a new five-year collective bargaining agreement ("CBA"). The CBA did not extend our obligation to make annual variable contributions to the Union VEBA. As a result of our obligation to make annual variable contributions to the Union VEBA expiring for any period after September 2017, we no longer account for the Union VEBA as a defined benefit plan and have removed the Union VEBA net assets and related deferred tax liabilities from our Consolidated Balance Sheets as of January 1, 2015. As of September 30, 2015, the estimated liability for the remaining variable cash contributions through September 2017, of $44.1 million in the aggregate was recorded in Other accrued liabilities and Long-term liabilities (see Note 2). Such amounts will be adjusted quarterly based on our most current cash flow (as previously defined) projections with the changes reflected in our Operating income (loss).

The projected benefit obligation and fair value of the plan assets of the Union VEBA as of December 31, 2014 were $391.5 million and $731.6 million, respectively. As a result of the termination of defined benefit plan accounting for the Union VEBA, the projected benefit obligation and fair value of the plan assets were removed from our consolidated financial statements, resulting in a non-cash loss of $307.8 million, net of a $184.4 million tax benefit, during the quarter ended March 31, 2015.

Components of Net Periodic Postretirement Benefit (Income) Cost. Our results of operations included the following impacts associated with the VEBAs and the Canadian defined benefit plan: (a) charges for service rendered by employees; (b) a charge for accretion of interest; (c) a benefit for the return on plan assets; and (d) amortization of net gains or losses on assets, prior service costs associated with plan amendments and actuarial differences. Net periodic postretirement benefit cost related to the Canadian defined benefit plan was not material for the quarters and nine months endedSeptember 30, 2015 and September 30, 2014. The following table presents the components of net periodic postretirement benefit cost (income) for the VEBAs and charges relating to all other employee benefit plans for the periods presented (in millions of dollars):

	Quarter Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
VEBAs:
Service cost1	$	—		$	0.6		$	—		$	1.7
Interest cost	0.7			4.2			2.1			12.5
Expected return on plan assets	(1.1		)	(12.9		)	(3.3		)	(38.5		)
Amortization of prior service cost	0.7			2.6			2.2			8.0
Amortization of net actuarial loss (gain)	0.3			(0.5		)	0.8			(1.4		)
Total net periodic postretirement benefit cost (income) relating to VEBAs	0.6			(6.0		)	1.8			(17.7		)
(Gain) loss on removal of Union VEBA net assets2	(2.9		)	—			490.9			—
Total VEBAs	(2.3		)	(6.0		)	492.7			(17.7		)
Other employee benefit plans:
Deferred compensation plan	(0.4		)	—			0.1			0.6
Defined contribution plans	1.4			1.3			7.1			6.8
Multiemployer pension plans	1.1			0.8			2.9			2.6
Total other employee benefit plans	$	2.1		$	2.1		$	10.1		$	10.0
Total	$	(0.2	)	$	(3.9	)	$	502.8		$	(7.7	)

____________

¹  The service cost related to the Salaried VEBA was insignificant for all periods presented.

²  Includes a $2.9 million adjustment during the quarter ended September 30, 2015 to decrease our contingent contribution accrual related to the Union VEBA settlement.

The following table presents the allocation of the charges (income) detailed above, by reportable segment and business unit (in millions of dollars – see Note 11):

	Quarter Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015		2014
Fabricated Products	$	2.4		$	2.0		$	9.4	$	8.9
All Other	(2.6		)	(5.9		)	493.4		(16.6		)
Total	$	(0.2	)	$	(3.9	)	$	502.8	$	(7.7	)

For all periods presented, Net periodic postretirement benefit cost (income) relating to VEBAs was included within All Other. Further, substantially all of the Fabricated Products segment’s employee benefits related charges are in Cost of products sold, excluding depreciation and amortization and other items with the remaining balance in Selling, general, administrative, research and development ("SG&A and R&D").

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Employee Incentive Plans

9 Months Ended

Sep. 30, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Employee Incentive Plans

Employee Incentive Plans

Short-Term Incentive Plans ("STI Plans")

We have annual short-term incentive compensation plans for senior management and certain other employees payable at our election in cash, shares of common stock, or a combination of cash and shares of common stock. Amounts earned under STI Plans are based on our adjusted earnings before interest, taxes, depreciation and amortization ("Adjusted EBITDA"), modified for certain safety, quality, delivery, cost and individual performance factors. The Adjusted EBITDA targets are determined based on the economic value added ("EVA") of our Fabricated Products business. Most of our production facilities have similar programs for both hourly and salaried employees.

Total costs relating to STI Plans were recorded as follows for each period presented (in millions of dollars):

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Cost of products sold, excluding depreciation and amortization and other items	$	1.0	$	1.3	$	3.2	$	3.8
SG&A and R&D	1.9		1.6		7.6		6.1
Total costs recorded in connection with STI Plans	$	2.9	$	2.9	$	10.8	$	9.9

The following table presents the allocation of the charges detailed above, by segment (in millions of dollars):

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Fabricated Products	$	2.2	$	2.2	$	7.7	$	7.6
All Other	0.7		0.7		3.1		2.3
Total costs recorded in connection with STI Plans	$	2.9	$	2.9	$	10.8	$	9.9

Long-Term Incentive Programs ("LTI Programs")

General. Executive officers and other key employees of the Company, as well as directors of the Company, are eligible to participate in the Kaiser Aluminum Corporation Amended and Restated 2006 Equity and Performance Incentive Plan (as amended, "Equity Incentive Plan"). Subject to certain adjustments that may be required from time to time to prevent dilution or enlargement of the rights of participants under the Equity Incentive Plan, a total of 2,722,222 common shares have been authorized for issuance under the Equity Incentive Plan. At September 30, 2015, 707,090 common shares were available for additional awards under the Equity Incentive Plan.

Non-Vested Common Shares and Restricted Stock Units. We grant non-vested common shares to our non-employee directors, executive officers and other key employees. We also grant restricted stock units to certain employees. The restricted stock units have rights similar to the rights of non-vested common shares and each restricted stock unit that becomes vested entitles the recipient to receive one common share. For both non-vested common shares and restricted stock units, the service period is generally one year for non-employee directors and three years for executive officers and other key employees.

In addition to non-vested common shares and restricted stock units, we grant performance shares to executive officers and other key employees. Each performance share that becomes vested entitles the recipient to receive one common share.Performance shares granted prior to 2014 ("EVA-Based Performance Shares") are subject to performance conditions pertaining to our EVA performance, measured over specified three-year performance periods. The number of EVA-Based Performance Shares that will ultimately vest and result in the issuance of common shares ranges between 0% to 200% of the target number of underlying common shares (constituting approximately one half of the maximum payout) and depends on the average annual EVA achieved for the specified three-year performance period. Performance shares granted after 2013 ("TSR-Based Performance Shares") are subject to performance conditions pertaining to our total shareholder return ("TSR") over specified three-year performance periods compared to the TSR of a specified group of peer companies. The number of TSR-Based Performance Shares that will ultimately vest under both the 2014-2016 and 2015-2017 LTI Programs and result in the issuance of common shares ranges between 0% to 200% of the target number of underlying common shares (constituting approximately one-half of the maximum payout) and depends on the percentile ranking of our TSR compared to the group of peer companies.

During the first quarter of 2015, a portion of the EVA-Based Performance shares granted under the 2012-2014 LTI Program vested (see "Summary of Activity" below). The vesting of performance shares resulting in the issuance and delivery of common shares, if any, under the 2013-2015, 2014-2016 and 2015-2017 LTI Programs will occur in 2016, 2017 and 2018, respectively.

Non-Cash Compensation Expense. Compensation expense relating to all awards under the Equity Incentive Plan is included in SG&A and R&D. Non-cash compensation expense by type of award under LTI Programs were as follows for each period presented (in millions of dollars):

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Non-vested common shares and restricted stock units	$	1.1	$	0.5	$	3.3	$	2.8
EVA-Based Performance Shares	0.1		—		0.8		1.0
TSR-Based Performance Shares	1.0		0.4		2.7		1.4
Total non-cash compensation expense	$	2.2	$	0.9	$	6.8	$	5.2

The following table presents the allocation of the charges detailed above, by segment (in millions of dollars):

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Fabricated Products	$	0.8	$	0.5	$	2.4	$	2.6
All Other	1.4		0.4		4.4		2.6
Total non-cash compensation expense	$	2.2	$	0.9	$	6.8	$	5.2

Unrecognized Gross Compensation Cost Data. The following table presents unrecognized gross compensation cost data by type of award as of September 30, 2015:

	Unrecognized gross compensation costs (in millions of dollars)		Expected period (in years) over which the remaining gross compensation costs will be recognized
Non-vested common shares and restricted stock units	$	6.9	2.0
EVA-Based Performance Shares	$	0.6	0.5
TSR-Based Performance Shares	$	8.8	2.1

Summary of Activity. A summary of the activity with respect to non-vested common shares, restricted stock units, EVA-Based Performance Shares and TSR-Based Performance Shares for the nine months endedSeptember 30, 2015 was as follows:

	Non-Vested Common Shares				Restricted Stock Units				EVA-Based Performance Shares				TSR-Based Performance Shares
	Shares		Weighted-Average Grant-Date Fair Value per Share		Units		Weighted-Average Grant-Date Fair Value per Unit		Shares		Weighted-Average Grant-Date Fair Value per Share		Shares		Weighted-Average Grant-Date Fair Value per Share
Outstanding at December 31, 2014	158,770		$	59.88	5,357		$	59.71	353,576		$	50.35	150,223		$	83.18
Granted1	62,285		72.09		2,325		69.83		—		—		150,424		95.68
Vested	(58,241	)	52.76		(2,161	)	52.91		(48,648	)	44.48		—		—
Forfeited1	(793	)	67.83		—		—		(432	)	57.54		(770	)	89.12
Canceled1	—		—		—		—		(146,016	)	44.48		—		—
Outstanding at September 30, 2015	162,021		$	67.09	5,521		$	66.64	158,480		$	57.75	299,877		$	89.43

____________

¹  For EVA-Based Performance Shares and TSR-Based Performance Shares, the number of shares granted and forfeited are presented at their maximum payout; and the number of shares canceled includes the number of shares that did not vest due to EVA performance results falling below those required for maximum payout.

Stock Options. We have fully-vested stock options that were granted in 2007. There were 16,645 fully-vested options outstanding as of September 30, 2015 and December 31, 2014, in each case exercisable to purchase common shares at $80.01 per share and having a remaining contractual life of 1.50 and 2.25 years, respectively. The average grant date fair value of the options was $39.90. No options were granted, exercised or forfeited during the nine months endedSeptember 30, 2015.

Vested Stock. From time to time, we issue common shares to non-employee directors electing to receive common shares in lieu of all or a portion of their annual retainer fees. The fair value of these common shares is based on the fair value of the shares at the date of issuance and is immediately recognized in earnings as a period expense. For each nine month period ended September 30, 2015 and September 30, 2014, we recorded $0.2 millionrelating to common shares granted to non-employee directors in lieu of all or a portion of their annual retainer fees.

Under the Equity Incentive Plan, participants may elect to have us withhold common shares to satisfy minimum statutory tax withholding obligations arising in connection with the exercise of stock options and vesting of non-vested shares, restricted stock units and performance shares. We cancel any such shares withheld on the applicable vesting dates or earlier dates when service requirements are satisfied, which correspond to the times at which income to the employee is recognized. When we withhold these common shares, we are required to remit to the appropriate taxing authorities the fair value of the shares withheld as of the vesting date. During the nine months ended September 30, 2015 and September 30, 2014, 35,081 and 33,696 common shares, respectively, were withheld and canceled for this purpose. The withholding of common shares by us could be deemed a purchase of the common shares.

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Derivative Financial Instruments and Related Hedging Programs

9 Months Ended

Sep. 30, 2015

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments and Related Hedging Programs

Derivative Financial Instruments and Related Hedging Programs

Overview. In conducting our business, we enter into derivative transactions, including forward contracts and options, to limit our economic (i.e. cash) exposure resulting from (i) metal price risk related to our sale of fabricated aluminum products and the purchase of metal used as raw material for our fabrication operations; (ii) energy price risk relating to fluctuating prices of natural gas and electricity used in our production processes; and (iii) foreign currency requirements with respect to our foreign subsidiaries and cash commitments for equipment purchases denominated in foreign currency.

Our derivative activities are overseen by a hedging committee ("Hedging Committee"), which is composed of our chief executive officer, chief financial officer, chief accounting officer, treasurer and vice president, commodity risk management and other officers and employees selected by the chief executive officer.The Hedging Committee meets regularly to review derivative positions and strategy and reports to our Board of Directors on the scope of its activities.

Hedges of Operational Risks

Designated Foreign Currency Cash Flow Hedges. We are exposed to foreign currency exchange risk related to firm price agreements for equipment purchases from foreign manufacturers. Such agreements require that we make payments in foreign currency to the vendor over time based on milestone achievements. We use foreign currency forward contracts in order to mitigate the exposure to currency exchange rate fluctuations related to these purchases. The timing and amounts of the forward contract settlements are designed to line up with the timing and amounts of scheduled payments to the foreign equipment manufacturers and are therefore expected to be highly effective hedges. As of September 30, 2015, we had open forward contracts designated as cash flow hedges to purchase euros with maturity dates between one and 15 months. The notional amounts of these foreign currency forward contracts totaled 7.3 million euros at September 30, 2015 with an average contract exchange rate of 1.14. The effective portion of the changes in fair value on these instruments is recorded within Other comprehensive income (loss) and is reclassified into the Statements of Consolidated Income on the same line item and the same period in which the underlying equipment is depreciated. We had no such reclassifications into earnings during the quarter ended September 30, 2015 and anticipate no such reclassifications for the next 12 months. For the nine months endedSeptember 30, 2015, we recorded an unrealized loss of $0.2 million on the effective portions of our designated foreign currency cash flow hedges. There were no gains or losses recorded on these hedges during the quarter endedSeptember 30, 2015 and no ineffectiveness was incurred on these hedges during the quarter and nine months endedSeptember 30, 2015.

Non-Designated Hedges of Operational Risks. Our pricing of fabricated aluminum products is generally intended to lock in a conversion margin (representing the value added from the fabrication process(es)) and to pass through metal price fluctuations to our customers. In certain instances, we enter into firm-price arrangements with our customers for stipulated volumes to be delivered in the future. Additionally, for some of our higher value added products sold on a spot basis, the pass through of metal price movements can sometimes lag by as much as several months, with a favorable impact to us when metal prices decline and an adverse impact to us when metal prices increase. Because we generally purchase primary and secondary aluminum on a floating price basis, the volume that we have committed to sell to our customers under a firm-price arrangement and the lag in passing through metal price movements to customers on some of our higher value added products sold on a spot basis create metal price risk for us. We use third-party hedging instruments to limit exposure to metal price risk related to firm-price customer sales contracts and the metal pass through lag on some of our products. See Note 9 for additional information regarding our material derivative positions relating to hedges of operational risk, and their respective fair values.

A majority of our derivative contracts relating to hedges of operational risks contain liquidity based thresholds that could require us to provide additional collateral in the event our liquidity were to fall below specified levels. To minimize the exposure to additional collateral requirements related to our liability hedge positions, we allocate hedging transactions among our counterparties, use options as part of our hedging activities, or both. The aggregate fair value of our derivative instruments that were in a net liability position was $18.5 million and $11.4 million at September 30, 2015 and December 31, 2014, respectively.

We regularly review the creditworthiness of our derivative counterparties and do not expect to incur significant loss from the failure of any counterparties to perform under any agreements.

During the nine months endedSeptember 30, 2015 and September 30, 2014, total Fabricated Products shipments that contained firm-price terms were (in millions of pounds) 148.6 and 109.3, respectively. At September 30, 2015, the Fabricated Products segment held contracts for the delivery of fabricated aluminum products that had the effect of creating price risk on anticipated purchases of aluminum for the remainder of 2015 and 2016, totaling approximately (in millions of pounds) 52.7 and 93.8, respectively.

Hedges Relating to the Convertible Notes

As described in Note 3, we issued $175.0 million principal amount of Convertible Notes due on April 1, 2015, which could only be settled in cash. The conversion feature of the Convertible Notes was required to be bifurcated from the Convertible Notes and treated as a separate derivative instrument. In order to offset the cash flow risk associated with the Bifurcated Conversion Feature, we purchased Option Assets that settled on April 1, 2015. The Option Assets were accounted for as derivative instruments. The cash we received on April 1, 2015 from the settlement of the Option Assets equaled and offset the cash that we paid to the holders of any converted Convertible Notes in excess of the principal amount thereof and interest payable thereon on April 1, 2015. See Note 9 for additional information regarding the fair values of the Bifurcated Conversion Feature and the Option Assets.

Realized and Unrealized Gains and Losses. Realized and unrealized (losses) gains associated with all derivative contracts consisted of the following for each period presented (in millions of dollars):

	Quarter Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Included in Other Comprehensive Income (Loss):
Unrealized (losses):
Foreign Currency	$	—		$	—		$	(0.2	)	$	—
Included in Statements of Consolidated Income (Loss):
Realized (losses) gains1:
Aluminum	(9.0		)	3.1			(18.8		)	5.2
Natural Gas	(1.2		)	(0.1		)	(3.8		)	1.1
Electricity	(0.3		)	0.1			(1.4		)	0.1
Total realized (losses) gains	$	(10.5	)	$	3.1		$	(24.0	)	$	6.4
Unrealized (losses)2:
Non-designated hedges of operational risk:
Aluminum	$	(0.3	)	$	(1.0	)	$	(8.8	)	$	1.3
Natural Gas	(1.0		)	(1.6		)	(0.2		)	(1.0		)
Electricity	(0.4		)	(1.0		)	1.3			(0.3		)
Foreign Currency	—			0.1			—			—
Total non-designated hedges of operational risk	(1.7		)	(3.5		)	(7.7		)	—
Option Assets relating to the Convertible Notes3	—			12.9			10.2			19.8
Bifurcated Conversion Feature of the Convertible Notes3	—			(10.7		)	(10.2		)	(16.2		)
Total unrealized (losses) gains	$	(1.7	)	$	(1.3	)	$	(7.7	)	$	3.6

______________________

¹  Realized (losses) gains on hedges of operational risk are recorded within Cost of products sold, excluding depreciation, amortization and other items.

²  Unrealized (losses) on hedges of operational risk are recorded within Unrealized losses on derivative instruments.

³  Unrealized (losses) gains on financial derivatives are recorded within Other income, net.

The following table summarizes our material derivative positions at September 30, 2015:

Aluminum	Maturity Period (month/year)	Notional Amount of contracts (mmlbs)
Fixed price purchase contracts	10/15 through 12/16	148.9
Fixed price sales contracts	10/15 through 10/16	2.4
Midwest premium swap contracts1	10/15 through 12/16	87.8

Natural Gas2	Maturity Period (month/year)	Notional Amount of contracts (mmbtu)
Fixed price purchase contracts	10/15 through 12/18	6,820,000

Electricity3	Maturity Period (month/year)	Notional Amount of contracts (Mwh)
Fixed price purchase contracts	10/15 through 12/15	44,180

Euro	Maturity Period (month/year)	Notional Amount of contracts (euro)
Fixed price purchase contracts	11/15 through 12/16	7,315,000

______________________

¹  Regional premiums represent the premium over the London Metal Exchange price for primary aluminum which is incurred on our purchases of primary aluminum.

²  As of September 30, 2015, we had Henry Hub NYMEX-based hedge positions in place to cover exposure to fluctuations in prices for approximately 76%, 75%, 57% and 11% of the expected natural gas purchases for the remainder of 2015, 2016, 2017 and 2018, respectively.

³  As of September 30, 2015, we had Mid-C International Commodity Exchange-based hedge positions, as well as physical delivery commitments with energy companies, in place to cover our exposure to fluctuations in electricity prices for approximately 54% of the expected electricity purchases for the remainder of 2015 and each of 2016 and 2017.

We enter into derivative contracts with counterparties, some of which are subject to enforceable master netting arrangements and some of which are not. We reflect the fair value of our derivative contracts on a gross basis on the Consolidated Balance Sheets (see Note 2).

The following tables present offsetting information regarding our derivatives by type of counterparty as of September 30, 2015 (in millions of dollars):

Derivative Assets and Collateral Held by Counterparty
							Gross Amounts Not Offset in the Consolidated Balance Sheets
	Gross Amounts of Recognized Assets		Gross Amounts Offset in the Consolidated Balance Sheets		Net Amounts of Assets Presented in the Consolidated Balance Sheets		Financial Instruments		Cash Collateral Received		Net Amount
Counterparty (with netting agreements)	$	0.3	$	—	$	0.3	$	0.3	$	—	$	—
Total	$	0.3	$	—	$	0.3	$	0.3	$	—	$	—

Derivative Liabilities and Collateral Held by Counterparty
									Gross Amounts Not Offset in the Consolidated Balance Sheets
	Gross Amounts of Recognized Liabilities			Gross Amounts Offset in the Consolidated Balance Sheets		Net Amounts of Liabilities Presented in the Consolidated Balance Sheets			Financial Instruments			Cash Collateral Pledged		Net Amount
Counterparty (with netting agreements)	$	(10.9	)	$	—	$	(10.9	)	$	(0.3	)	$	—	$	(10.6	)
Counterparty (without netting agreements)	(0.5		)	—		(0.5		)	—			—		(0.5		)
Counterparty (with partial netting agreements)	(7.9		)	—		(7.9		)	—			—		(7.9		)
Total	$	(19.3	)	$	—	$	(19.3	)	$	(0.3	)	$	—	$	(19.0	)

The following tables present offsetting information regarding our derivatives by type of counterparty as of December 31, 2014 (in millions of dollars):

Derivative Assets and Collateral Held by Counterparty
							Gross Amounts Not Offset in the Consolidated Balance Sheets
	Gross Amounts of Recognized Assets		Gross Amounts Offset in the Consolidated Balance Sheets		Net Amounts of Assets Presented in the Consolidated Balance Sheets		Financial Instruments		Cash Collateral Received		Net Amount
Counterparty (with netting agreements)	$	0.9	$	—	$	0.9	$	0.8	$	—	$	0.1
Counterparty (without netting agreements)1	84.8		—		84.8		—		—		84.8
Total	$	85.7	$	—	$	85.7	$	0.8	$	—	$	84.9

Derivative Liabilities and Collateral Held by Counterparty
									Gross Amounts Not Offset in the Consolidated Balance Sheets
	Gross Amounts of Recognized Liabilities			Gross Amounts Offset in the Consolidated Balance Sheets		Net Amounts of Liabilities Presented in the Consolidated Balance Sheets			Financial Instruments			Cash Collateral Pledged		Net Amount
Counterparty (with netting agreements)	$	(8.0	)	$	—	$	(8.0	)	$	(0.8	)	$	—	$	(7.2	)
Counterparty (without netting agreements)1	(85.0		)	—		(85.0		)	—			—		(85.0		)
Counterparty (with partial netting agreements)	(3.8		)	—		(3.8		)	—			—		(3.8		)
Total	$	(96.8	)	$	—	$	(96.8	)	$	(0.8	)	$	—	$	(96.0	)

_________________

¹  Such amounts include the fair value of the Bifurcated Conversion Feature and Option Assets at December 31, 2014 (see Note 9).

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Segment Information, Textuals (Details) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) productionfacilities	Sep. 30, 2014 USD ($)	Dec. 31, 2014
Segment Reporting Information
Unrealized gains (losses) on derivatives			$ (7.7)	$ 3.6
Net periodic postretirement benefit cost relating to Salaried VEBA	$ 0.6	$ (6.0)	1.8	(17.7)
Fabricated Products
Segment Reporting Information
Unrealized gains (losses) on derivatives	$ (1.7)	$ (3.5)	$ (7.7)	$ 0.0
United States
Segment Reporting Information
Number of production facilities | productionfacilities			11
Canada
Segment Reporting Information
Number of production facilities | productionfacilities			1
Customer Concentration Risk | Largest Customer | Sales Revenue, Net | Fabricated Products
Segment Reporting Information
Concentration Risk, Percentage	25.00%	25.00%	25.00%	26.00%
Customer Concentration Risk | Largest Customer | Accounts Receivable
Segment Reporting Information
Concentration Risk, Percentage			17.00%		10.00%
Customer Concentration Risk | Second Largest Customer | Accounts Receivable
Segment Reporting Information
Concentration Risk, Percentage					12.00%
VEBAs
Segment Reporting Information
Net periodic postretirement benefit cost relating to Salaried VEBA	$ 0.6	$ (6.0)	$ 1.8	$ (17.7)
Pre-tax loss on settlement of Union VEBA	$ (2.9)	$ 0.0	$ 490.9	$ 0.0

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Segment Information, Net Sales by Product Categories (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net Sales:
Net sales	$ 336.4	$ 338.9	$ 1,075.3	$ 1,018.1
Aero/HS products
Net Sales:
Net sales	170.0	172.5	531.4	509.1
Automotive Extrusions
Net Sales:
Net sales	49.5	44.0	153.3	129.5
GE products
Net Sales:
Net sales	100.4	103.6	331.5	323.1
Other products
Net Sales:
Net sales	$ 16.5	$ 18.8	$ 59.1	$ 56.4

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Earnings Per Share, Anti Dilution Table (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	76	1,071	68
Options to purchase common shares
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	20	17	20
Non-vested common shares, restricted stock units and performance shares
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	56	281	48
Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	0	773	0

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Segment Information (Tables)

9 Months Ended

Sep. 30, 2015

Segment Reporting [Abstract]

Summary of financial information by operating segment

	Quarter Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Net sales:
Fabricated Products	$	336.4		$	338.9		$	1,075.3		$	1,018.1
Segment operating income (loss):
Fabricated Products1	$	47.3		$	35.6		$	142.8		$	121.2
All Other2	(6.8		)	(3.0		)	(523.9		)	(10.1		)
Total operating income (loss)	$	40.5		$	32.6		$	(381.1	)	$	111.1
Interest expense	(4.9		)	(9.7		)	(19.9		)	(27.7		)
Other (expense) income, net	(0.9		)	2.2			(0.1		)	5.9
Income (loss) before income taxes	$	34.7		$	25.1		$	(401.1	)	$	89.3
Depreciation and amortization:
Fabricated Products	$	7.9		$	7.8		$	23.8		$	22.7
All Other	0.2			0.2			0.4			0.4
Total depreciation and amortization	$	8.1		$	8.0		$	24.2		$	23.1
Capital expenditures:
Fabricated Products	$	15.1		$	9.3		$	37.8		$	38.8
All Other	0.4			0.2			0.6			0.8
Total capital expenditures	$	15.5		$	9.5		$	38.4		$	39.6

_____________________

¹  Fabricated Products segment operating income included non-cash mark-to-market losses on primary aluminum, natural gas, electricity and foreign currency hedging activities, which totaled $1.7 million and $3.5 million for the quarters ended September 30, 2015 and September 30, 2014, respectively. There was a $7.7 million non-cash mark-to-market loss on primary aluminum, natural gas, electricity and foreign currency hedging activities for the nine months endedSeptember 30, 2015 and none for the nine months endedSeptember 30, 2014. For further discussion regarding mark-to-market matters, see Note 8.

²  Operating loss in All Other included Net periodic postretirement benefit cost (income) of $0.6 million and $(6.0) million for the quarters ended September 30, 2015 and September 30, 2014, respectively, and $1.8 million and $(17.7) million for the nine months endedSeptember 30, 2015 and September 30, 2014, respectively. Additionally, operating loss in All Other included (gain) loss on removal of Union VEBA net assets of $(2.9) million and $490.9 million during the quarter and nine months endedSeptember 30, 2015, respectively. See Note 5 for further details.

	September 30, 2015		December 31, 2014
Assets:
Fabricated Products	$	897.3	$	878.9
All Other1	365.8		864.8
Total assets	$	1,263.1	$	1,743.7

_____________________

¹  Assets in All Other represent primarily all of our cash and cash equivalents, short-term investments, financial derivative assets, net assets of VEBAs (see Note 5 and Note 9) and net deferred income tax assets.

Schedule of net sales by end market segment applications

Net sales by product categories based on end market applications for the Fabricated Products segment were as follows (in millions of dollars):

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Net sales:
Aero/HS products	$	170.0	$	172.5	$	531.4	$	509.1
Automotive Extrusions	49.5		44.0		153.3		129.5
GE products	100.4		103.6		331.5		323.1
Other products	16.5		18.8		59.1		56.4
Total net sales	$	336.4	$	338.9	$	1,075.3	$	1,018.1

Schedule of income taxes paid by geographical area

Geographic information for income taxes paid were as follows (in millions of dollars):

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Income taxes paid:
Fabricated Products —
United States	$	0.1	$	1.4	$	0.4	$	1.6
Canada	0.2		0.2		1.5		1.1
Total income taxes paid	$	0.3	$	1.6	$	1.9	$	2.7

Schedule of information for contractual delivery of primary aluminum supply from major suppliers

Information for contractual delivery of our primary aluminum supply from our major suppliers were as follows:

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Percentage of total annual primary aluminum supply (lbs):
Supply from the Company's top five major suppliers	84	%	82	%	86	%	79	%
Supply from the Company's largest supplier	28	%	31	%	28	%	30	%
Supply from the Company's second and third largest suppliers	45	%	34	%	36	%	32	%

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Commitments and Contingencies Contractual Obligations (Details) $ in Millions	Sep. 30, 2015 USD ($)
Long-term Purchase Commitment [Line Items]
Purchase Obligation	$ 33.3
Purchase Obligation, Due in Second Year	13.4
Purchase Obligation, Due in Third Year	6.7
Equipment [Member]
Long-term Purchase Commitment [Line Items]
Purchase Obligation	7.1
Purchase Obligation, Due in Second Year	5.3
Purchase Obligation, Due in Third Year	0.1
Raw Materials [Member]
Long-term Purchase Commitment [Line Items]
Purchase Obligation	26.2
Purchase Obligation, Due in Second Year	6.5
Purchase Obligation, Due in Third Year	0.5
Energy [Member]
Long-term Purchase Commitment [Line Items]
Purchase Obligation, Due in Second Year	1.6
Purchase Obligation, Due in Third Year	$ 6.1

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Other Income (Expense), Net

9 Months Ended

Sep. 30, 2015

Other Income and Expenses [Abstract]

Other Income (Expense), Net

Other (Expense) Income, Net

Other income, net consisted of the following for each period presented (in millions of dollars):

	Quarter Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Interest income	$	0.1		$	0.3		$	0.3		$	0.8
Unrealized gains on financial derivatives1	—			2.2			—			3.6
Realized gains on investments	—			—			0.5			0.4
All other (expense) income, net	(1.0		)	(0.3		)	(0.9		)	1.1
Other (expense) income, net	$	(0.9	)	$	2.2		$	(0.1	)	$	5.9

______________________

¹  See "Hedges Relating to the Convertible Notes" in Note 8 for discussion of such instruments.

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Supplemental Balance Sheet Information Supplemental Balance Sheet Information (Tables)

9 Months Ended

Sep. 30, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Supplemental Balance Sheet Disclosures

	September 30, 2015			December 31, 2014
	(In millions of dollars)
Cash and Cash Equivalents
Cash and money market funds	$	37.1		$	29.5
Commercial paper	45.5			148.2
Total	$	82.6		$	177.7
Trade Receivables – Net
Billed trade receivables	$	132.2		$	128.7
Unbilled trade receivables	0.2			1.4
Trade receivables, gross	132.4			130.1
Allowance for doubtful receivables	(0.8		)	(0.8		)
Trade receivables – net	$	131.6		$	129.3
Inventories
Finished products	$	63.1		$	73.6
Work-in-process	82.2			66.7
Raw materials	49.6			54.2
Operating supplies and repair and maintenance parts	22.4			20.2
Total	$	217.3		$	214.7

	September 30, 2015			December 31, 2014
	(In millions of dollars)
Prepaid Expenses and Other Current Assets
Current derivative assets – Notes 8 and 9	$	0.3		$	85.7
Current deferred tax assets	92.2			86.4
Short-term restricted cash	0.3			0.3
Prepaid taxes	1.1			—
Other	4.7			6.2
Total	$	98.6		$	178.6
Property, Plant and Equipment – Net
Land and improvements	$	22.7		$	22.9
Buildings and leasehold improvements	68.4			63.8
Machinery and equipment	528.1			509.8
Construction in progress	42.6			25.2
Property, plant and equipment – gross	661.8			621.7
Accumulated depreciation	(189.4		)	(166.8		)
Assets held for sale	0.3			—
Property, plant and equipment – net	$	472.7		$	454.9
Other Assets
Restricted cash	$	10.6		$	10.0
Deferred financing costs	4.5			5.9
Deferred compensation plan assets	7.0			7.3
Other	—			0.1
Total	$	22.1		$	23.3
Other Accrued Liabilities
Current derivative liabilities – Notes 8 and 9	$	16.5		$	94.9
Uncleared cash disbursements	10.1			9.1
Accrued income taxes and taxes payable	6.4			5.2
Accrued annual contribution to VEBAs	—			13.7
Accrued contingent contribution to Union VEBA – Note 5	14.2			—
Short-term environmental accruals – Note 7	2.2			2.3
Accrued interest	6.2			3.7
Short-term deferred revenue	1.5			0.2
Other	4.3			3.7
Total	$	61.4		$	132.8

	September 30, 2015		December 31, 2014
	(In millions of dollars)
Long-Term Liabilities
Derivative liabilities – Notes 8 and 9	$	2.8	$	1.9
Income tax liabilities	0.7		2.4
Workers’ compensation accruals	20.5		21.5
Long-term environmental accruals – Note 7	16.6		17.0
Long-term asset retirement obligations	4.5		4.4
Deferred compensation liabilities	7.3		7.2
Long-term deferred revenue	0.4		0.5
Long-term capital leases	0.1		0.1
Long-term portion of contingent contribution to Union VEBA – Note 5	29.9		—
Other long-term liabilities	3.2		3.3
Total	$	86.0	$	58.3

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Employee Incentive Plans, Long term Incentive Plans (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award
Number of common shares authorized for issuance under Equity Incentive Plan	2,722,222		2,722,222
Number of common shares available for additional awards under Equity Incentive Plan	707,090		707,090
Non-cash compensation expense	$ 2.2	$ 0.9	$ 6.8	$ 5.2
Stock Options
Fully-vested options outstanding	16,645		16,645		16,645
Exercise price of options to purchase common stock	$ 80.01		$ 80.01		$ 80.01
Remaining contractual life of options outstanding			1 year 6 months		2 years 3 months
Grant date fair value of options outstanding			$ 39.90		$ 39.90
Stock options granted			0
Stock options forfeited			0
Stock options exercised			0
Fabricated Products
Share-based Compensation Arrangement by Share-based Payment Award
Non-cash compensation expense	$ 0.8	0.5	$ 2.4	2.6
All Other
Share-based Compensation Arrangement by Share-based Payment Award
Non-cash compensation expense	$ 1.4	0.4	$ 4.4	2.6
Non-vested common shares
Summary of Activity
Outstanding at December 31, 2014			158,770
Weighted-Average Grant-Date Fair Value per Share			$ 59.88
Granted, shares			62,285
Granted, Weighted-Average Grant-Date Fair Value per Share			$ 72.09
Vested, shares			(58,241)
Vested, Weighted-Average Grant-Date Fair Value per Share			$ 52.76
Forfeited, shares			(793)
Forfeited, Weighted-Average Grant-Date Fair Value per Share			$ 67.83
Canceled, Shares			0
Canceled, Weighted-Average Grant-Date Fair Value per Share			$ 0
Outstanding at September 30, 2015	162,021		162,021		158,770
Weighted-Average Grant-Date Fair Value per Share	$ 67.09		$ 67.09		$ 59.88
Restricted stock units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award
Number of common shares received by the employee on vesting of restricted stock unit			1
Summary of Activity
Outstanding at December 31, 2014			5,357
Weighted-Average Grant-Date Fair Value per Share			$ 59.71
Granted, shares			2,325
Granted, Weighted-Average Grant-Date Fair Value per Share			$ 69.83
Vested, shares			(2,161)
Vested, Weighted-Average Grant-Date Fair Value per Share			$ 52.91
Forfeited, shares			0
Forfeited, Weighted-Average Grant-Date Fair Value per Share			$ 0
Canceled, Shares			0
Canceled, Weighted-Average Grant-Date Fair Value per Share			$ 0
Outstanding at September 30, 2015	5,521		5,521		5,357
Weighted-Average Grant-Date Fair Value per Share	$ 66.64		$ 66.64		$ 59.71
Non-vested common shares and restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award
Non-cash compensation expense	$ 1.1	0.5	$ 3.3	2.8
Unrecognized gross compensation costs (in millions of dollars)	6.9		$ 6.9
Expected period (in years) over which the remaining gross compensation costs will be recognized			2 years
EVA-Based Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award
Performance award vesting period, years			3 years
Non-cash compensation expense	0.1	0.0	$ 0.8	1.0
Unrecognized gross compensation costs (in millions of dollars)	$ 0.6		$ 0.6
Expected period (in years) over which the remaining gross compensation costs will be recognized			6 months
Summary of Activity
Outstanding at December 31, 2014			353,576
Weighted-Average Grant-Date Fair Value per Share			$ 50.35
Granted, shares			0
Granted, Weighted-Average Grant-Date Fair Value per Share			$ 0.00
Vested, shares			(48,648)
Vested, Weighted-Average Grant-Date Fair Value per Share			$ 44.48
Forfeited, shares			(432)
Forfeited, Weighted-Average Grant-Date Fair Value per Share			$ 57.54
Canceled, Shares			(146,016)
Canceled, Weighted-Average Grant-Date Fair Value per Share			$ 44.48
Outstanding at September 30, 2015	158,480		158,480		353,576
Weighted-Average Grant-Date Fair Value per Share	$ 57.75		$ 57.75		$ 50.35
TSR-Based Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award
Non-cash compensation expense	$ 1.0	$ 0.4	$ 2.7	$ 1.4
Unrecognized gross compensation costs (in millions of dollars)	$ 8.8		$ 8.8
Expected period (in years) over which the remaining gross compensation costs will be recognized			2 years 1 month
Summary of Activity
Outstanding at December 31, 2014			150,223
Weighted-Average Grant-Date Fair Value per Share			$ 83.18
Granted, shares			150,424
Granted, Weighted-Average Grant-Date Fair Value per Share			$ 95.68
Vested, shares			0
Vested, Weighted-Average Grant-Date Fair Value per Share			$ 0
Forfeited, shares			(770)
Forfeited, Weighted-Average Grant-Date Fair Value per Share			$ 89.12
Canceled, Shares			0
Canceled, Weighted-Average Grant-Date Fair Value per Share			$ 0
Outstanding at September 30, 2015	299,877		299,877		150,223
Weighted-Average Grant-Date Fair Value per Share	$ 89.43		$ 89.43		$ 83.18
Minimum
Share-based Compensation Arrangement by Share-based Payment Award
Performance award vesting period, years	1 year
Minimum | EVA-Based Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	0.00%
Minimum | TSR-Based Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	0.00%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award
Performance award vesting period, years	3 years
Maximum | EVA-Based Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	200.00%
Maximum | TSR-Based Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	200.00%

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Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Cash and Cash Equivalents
Cash and money market funds	$ 37.1	$ 29.5
Commercial paper	45.5	148.2
Total	82.6	177.7
Trade Receivables – Net
Trade receivables, gross	132.4	130.1
Allowance for doubtful receivables	(0.8)	(0.8)
Trade receivables – net	131.6	129.3
Inventories
Finished products	63.1	73.6
Work-in-process	82.2	66.7
Raw materials	49.6	54.2
Operating supplies and repair and maintenance parts	22.4	20.2
Total	217.3	214.7
Prepaid Expenses and Other Current Assets
Current derivative assets – Notes 8 and 9	0.3	85.7
Current deferred tax assets	92.2	86.4
Short-term restricted cash	0.3	0.3
Prepaid taxes	1.1	0.0
Other	4.7	6.2
Total	98.6	178.6
Property, Plant and Equipment – Net
Land and improvements	22.7	22.9
Buildings and leasehold improvements	68.4	63.8
Machinery and equipment	528.1	509.8
Construction in progress	42.6	25.2
Property, plant and equipment – gross	661.8	621.7
Accumulated depreciation	(189.4)	(166.8)
Assets held for sale	0.3	0.0
Property, plant and equipment – net	472.7	454.9
Other Assets
Restricted cash	10.6	10.0
Deferred financing costs	4.5	5.9
Deferred compensation plan assets	7.0	7.3
Other	0.0	0.1
Total	22.1	23.3
Other Accrued Liabilities
Current derivative liabilities – Notes 8 and 9	16.5	94.9
Uncleared cash disbursements	10.1	9.1
Accrued income taxes and taxes payable	6.4	5.2
Accrued annual contribution to VEBAs	0.0	13.7
Accrued contingent contribution to Union VEBA – Note 5	14.2	0.0
Short-term environmental accruals – Note 7	2.2	2.3
Accrued interest	6.2	3.7
Short-term deferred revenue	1.5	0.2
Other	4.3	3.7
Total	61.4	132.8
Long-Term Liabilities
Derivative liabilities – Notes 8 and 9	2.8	1.9
Income tax liabilities	0.7	2.4
Workers’ compensation accruals	20.5	21.5
Long-term environmental accruals – Note 7	16.6	17.0
Long-term asset retirement obligations	4.5	4.4
Deferred compensation liabilities	7.3	7.2
Long-term deferred revenue	0.4	0.5
Long-term capital leases	0.1	0.1
Long-term portion of contingent contribution to Union VEBA – Note 5	29.9	0.0
Other long-term liabilities	3.2	3.3
Total	86.0	58.3
Billed
Trade Receivables – Net
Trade receivables, gross	132.2	128.7
Unbilled
Trade Receivables – Net
Trade receivables, gross	$ 0.2	$ 1.4

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Statements of Consolidated Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net loss	$ 22.1	$ 15.9	$ (249.9)	$ 56.2
Reclassification adjustments:
Amortization of net actuarial loss (gain)	0.3	(0.5)	0.8	(1.4)
Amortization of prior service cost	0.7	2.6	2.2	8.0
Removal of obligation relating to Union VEBA	0.0	0.0	106.6	0.0
Other comprehensive income relating to VEBAs	1.0	2.1	109.6	6.6
Available for sale securities:
Unrealized (loss) gain on available for sale securities	(0.4)	(0.2)	(0.7)	0.1
Reclassification adjustments:
Reclassification of unrealized (gain) loss upon sale of available for sale securities	(0.1)	0.0	0.1	(0.2)
Other comprehensive loss relating to available for sale securities	(0.5)	(0.2)	(0.6)	(0.1)
Unrealized loss on foreign currency cash flow hedges	0.0	0.0	(0.2)	0.0
Foreign currency translation (loss) gain	(0.3)	0.1	(0.2)	0.2
Other comprehensive income, before tax	0.2	2.0	108.6	6.7
Income tax expense related to items of other comprehensive income	(0.1)	(0.7)	(41.2)	(2.4)
Other comprehensive income, net of tax	0.1	1.3	67.4	4.3
Comprehensive income (loss)	$ 22.2	$ 17.2	$ (182.5)	$ 60.5

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Supplemental Balance Sheet Information

9 Months Ended

Sep. 30, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Supplemental Balance Sheet Information

Supplemental Balance Sheet Information

	September 30, 2015			December 31, 2014
	(In millions of dollars)
Cash and Cash Equivalents
Cash and money market funds	$	37.1		$	29.5
Commercial paper	45.5			148.2
Total	$	82.6		$	177.7
Trade Receivables – Net
Billed trade receivables	$	132.2		$	128.7
Unbilled trade receivables	0.2			1.4
Trade receivables, gross	132.4			130.1
Allowance for doubtful receivables	(0.8		)	(0.8		)
Trade receivables – net	$	131.6		$	129.3
Inventories
Finished products	$	63.1		$	73.6
Work-in-process	82.2			66.7
Raw materials	49.6			54.2
Operating supplies and repair and maintenance parts	22.4			20.2
Total	$	217.3		$	214.7

	September 30, 2015			December 31, 2014
	(In millions of dollars)
Prepaid Expenses and Other Current Assets
Current derivative assets – Notes 8 and 9	$	0.3		$	85.7
Current deferred tax assets	92.2			86.4
Short-term restricted cash	0.3			0.3
Prepaid taxes	1.1			—
Other	4.7			6.2
Total	$	98.6		$	178.6
Property, Plant and Equipment – Net
Land and improvements	$	22.7		$	22.9
Buildings and leasehold improvements	68.4			63.8
Machinery and equipment	528.1			509.8
Construction in progress	42.6			25.2
Property, plant and equipment – gross	661.8			621.7
Accumulated depreciation	(189.4		)	(166.8		)
Assets held for sale	0.3			—
Property, plant and equipment – net	$	472.7		$	454.9
Other Assets
Restricted cash	$	10.6		$	10.0
Deferred financing costs	4.5			5.9
Deferred compensation plan assets	7.0			7.3
Other	—			0.1
Total	$	22.1		$	23.3
Other Accrued Liabilities
Current derivative liabilities – Notes 8 and 9	$	16.5		$	94.9
Uncleared cash disbursements	10.1			9.1
Accrued income taxes and taxes payable	6.4			5.2
Accrued annual contribution to VEBAs	—			13.7
Accrued contingent contribution to Union VEBA – Note 5	14.2			—
Short-term environmental accruals – Note 7	2.2			2.3
Accrued interest	6.2			3.7
Short-term deferred revenue	1.5			0.2
Other	4.3			3.7
Total	$	61.4		$	132.8

	September 30, 2015		December 31, 2014
	(In millions of dollars)
Long-Term Liabilities
Derivative liabilities – Notes 8 and 9	$	2.8	$	1.9
Income tax liabilities	0.7		2.4
Workers’ compensation accruals	20.5		21.5
Long-term environmental accruals – Note 7	16.6		17.0
Long-term asset retirement obligations	4.5		4.4
Deferred compensation liabilities	7.3		7.2
Long-term deferred revenue	0.4		0.5
Long-term capital leases	0.1		0.1
Long-term portion of contingent contribution to Union VEBA – Note 5	29.9		—
Other long-term liabilities	3.2		3.3
Total	$	86.0	$	58.3

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Fair Value Measurements, Fair Value Hierarchy Table (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Financial Assets:
Derivative Asset	$ 0.3	$ 85.7
Deferred compensation plan assets	7.0	7.3
Financial Liabilities:
Derivative Liability	(19.3)	(96.8)
Recurring
Financial Assets:
Cash and cash equivalents	82.6	177.7
Deferred compensation plan assets	7.0	7.3
Total Assets	119.9	384.7
Financial Liabilities:
Convertible Notes		(263.3)
Total Liabilities	(252.3)	(604.6)
Recurring | Senior Notes
Financial Liabilities:
Senior Notes	(233.0)	(244.5)
Recurring | Debt securities
Financial Assets:
Short-term investments	30.0	114.0
Recurring | Aluminum | Midwest premium swap contracts
Financial Assets:
Derivative Asset	0.1
Recurring | Level 1
Financial Assets:
Cash and cash equivalents	37.1	29.5
Deferred compensation plan assets	0.0	0.0
Total Assets	37.1	29.5
Financial Liabilities:
Convertible Notes		(263.3)
Total Liabilities	(233.0)	(507.8)
Recurring | Level 1 | Senior Notes
Financial Liabilities:
Senior Notes	(233.0)	(244.5)
Recurring | Level 1 | Debt securities
Financial Assets:
Short-term investments	0.0	0.0
Recurring | Level 1 | Aluminum | Midwest premium swap contracts
Financial Assets:
Derivative Asset	0.0
Recurring | Level 2
Financial Assets:
Cash and cash equivalents	45.5	148.2
Deferred compensation plan assets	7.0	7.3
Total Assets	82.7	354.2
Financial Liabilities:
Convertible Notes		0.0
Total Liabilities	(17.3)	(96.8)
Recurring | Level 2 | Senior Notes
Financial Liabilities:
Senior Notes	0.0	0.0
Recurring | Level 2 | Debt securities
Financial Assets:
Short-term investments	30.0	114.0
Recurring | Level 2 | Aluminum | Midwest premium swap contracts
Financial Assets:
Derivative Asset	0.0
Recurring | Level 3
Financial Assets:
Cash and cash equivalents	0.0	0.0
Deferred compensation plan assets	0.0	0.0
Total Assets	0.1	1.0
Financial Liabilities:
Convertible Notes		0.0
Total Liabilities	(2.0)	0.0
Recurring | Level 3 | Senior Notes
Financial Liabilities:
Senior Notes	0.0	0.0
Recurring | Level 3 | Debt securities
Financial Assets:
Short-term investments	0.0	0.0
Not Designated as Hedging Instrument | Recurring | Aluminum | Fixed priced contracts | Purchase
Financial Liabilities:
Derivative Liability	(10.3)	(4.2)
Not Designated as Hedging Instrument | Recurring | Aluminum | Fixed priced contracts | Sales
Financial Assets:
Derivative Asset	0.2
Not Designated as Hedging Instrument | Recurring | Aluminum | Midwest premium swap contracts
Financial Assets:
Derivative Asset		1.0
Financial Liabilities:
Derivative Liability	(2.0)
Not Designated as Hedging Instrument | Recurring | Natural Gas | Fixed priced contracts | Purchase
Financial Liabilities:
Derivative Liability	(6.4)	(6.2)
Not Designated as Hedging Instrument | Recurring | Electricity | Fixed priced contracts | Purchase
Financial Liabilities:
Derivative Liability	(0.4)	(1.7)
Not Designated as Hedging Instrument | Recurring | Hedges Relating to the Convertible Notes | Call Options
Financial Assets:
Derivative Asset		84.7
Not Designated as Hedging Instrument | Recurring | Hedges Relating to the Convertible Notes | Bifurcated Conversion Feature
Financial Liabilities:
Derivative Liability		(84.7)
Not Designated as Hedging Instrument | Recurring | Level 1 | Aluminum | Fixed priced contracts | Purchase
Financial Liabilities:
Derivative Liability	0.0	0.0
Not Designated as Hedging Instrument | Recurring | Level 1 | Aluminum | Fixed priced contracts | Sales
Financial Assets:
Derivative Asset	0.0
Not Designated as Hedging Instrument | Recurring | Level 1 | Aluminum | Midwest premium swap contracts
Financial Assets:
Derivative Asset		0.0
Financial Liabilities:
Derivative Liability	0.0
Not Designated as Hedging Instrument | Recurring | Level 1 | Natural Gas | Fixed priced contracts | Purchase
Financial Liabilities:
Derivative Liability	0.0	0.0
Not Designated as Hedging Instrument | Recurring | Level 1 | Electricity | Fixed priced contracts | Purchase
Financial Liabilities:
Derivative Liability	0.0	0.0
Not Designated as Hedging Instrument | Recurring | Level 1 | Hedges Relating to the Convertible Notes | Call Options
Financial Assets:
Derivative Asset		0.0
Not Designated as Hedging Instrument | Recurring | Level 1 | Hedges Relating to the Convertible Notes | Bifurcated Conversion Feature
Financial Liabilities:
Derivative Liability		0.0
Not Designated as Hedging Instrument | Recurring | Level 2 | Aluminum | Fixed priced contracts | Purchase
Financial Liabilities:
Derivative Liability	(10.3)	(4.2)
Not Designated as Hedging Instrument | Recurring | Level 2 | Aluminum | Fixed priced contracts | Sales
Financial Assets:
Derivative Asset	0.2
Not Designated as Hedging Instrument | Recurring | Level 2 | Aluminum | Midwest premium swap contracts
Financial Assets:
Derivative Asset		0.0
Financial Liabilities:
Derivative Liability	0.0
Not Designated as Hedging Instrument | Recurring | Level 2 | Natural Gas | Fixed priced contracts | Purchase
Financial Liabilities:
Derivative Liability	(6.4)	(6.2)
Not Designated as Hedging Instrument | Recurring | Level 2 | Electricity | Fixed priced contracts | Purchase
Financial Liabilities:
Derivative Liability	(0.4)	(1.7)
Not Designated as Hedging Instrument | Recurring | Level 2 | Hedges Relating to the Convertible Notes | Call Options
Financial Assets:
Derivative Asset		84.7
Not Designated as Hedging Instrument | Recurring | Level 2 | Hedges Relating to the Convertible Notes | Bifurcated Conversion Feature
Financial Liabilities:
Derivative Liability		(84.7)
Not Designated as Hedging Instrument | Recurring | Level 3 | Aluminum | Fixed priced contracts | Purchase
Financial Liabilities:
Derivative Liability	0.0	0.0
Not Designated as Hedging Instrument | Recurring | Level 3 | Aluminum | Fixed priced contracts | Sales
Financial Assets:
Derivative Asset	0.0
Not Designated as Hedging Instrument | Recurring | Level 3 | Aluminum | Midwest premium swap contracts
Financial Assets:
Derivative Asset		1.0
Not Designated as Hedging Instrument | Recurring | Level 3 | Natural Gas | Fixed priced contracts | Purchase
Financial Liabilities:
Derivative Liability	0.0	0.0
Not Designated as Hedging Instrument | Recurring | Level 3 | Electricity | Fixed priced contracts | Purchase
Financial Liabilities:
Derivative Liability	0.0	0.0
Not Designated as Hedging Instrument | Recurring | Level 3 | Hedges Relating to the Convertible Notes | Call Options
Financial Assets:
Derivative Asset		0.0
Not Designated as Hedging Instrument | Recurring | Level 3 | Hedges Relating to the Convertible Notes | Bifurcated Conversion Feature
Financial Liabilities:
Derivative Liability		$ 0.0
Designated as Hedging Instrument [Member] | Recurring | Foreign Currency Member | Fixed priced contracts | Purchase
Financial Liabilities:
Derivative Liability	(0.2)
Designated as Hedging Instrument [Member] | Recurring | Level 1 | Foreign Currency Member | Fixed priced contracts | Purchase
Financial Liabilities:
Derivative Liability	0.0
Designated as Hedging Instrument [Member] | Recurring | Level 2 | Foreign Currency Member | Fixed priced contracts | Purchase
Financial Liabilities:
Derivative Liability	(0.2)
Designated as Hedging Instrument [Member] | Recurring | Level 3 | Foreign Currency Member | Fixed priced contracts | Purchase
Financial Liabilities:
Derivative Liability	0.0
Income Approach Valuation Technique | Level 3 | Aluminum | Midwest premium swap contracts
Financial Assets:
Derivative Asset	0.1
Income Approach Valuation Technique | Not Designated as Hedging Instrument | Level 3 | Aluminum | Midwest premium swap contracts
Financial Liabilities:
Derivative Liability	$ (2.0)

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Other Income (Expense), Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Other Income and Expenses [Abstract]
Interest income	$ 0.1	$ 0.3	$ 0.3	$ 0.8
Unrealized gains (losses) on financial derivatives	0.0	2.2	0.0	3.6
Realized gains on investments	0.0	0.0	0.5	0.4
All other (expense) income, net	(1.0)	(0.3)	(0.9)	1.1
Other (expense) income, net	$ (0.9)	$ 2.2	$ (0.1)	$ 5.9

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Long-Term Debt and Credit Facility (Tables)

9 Months Ended

Sep. 30, 2015

Debt Disclosure [Abstract]

Principal amount, carrying amount, and interest expense of the notes

The following table provides additional information regarding the Convertible Notes (in millions of dollars):

	Quarter Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Contractual coupon interest	$	—	$	2.0	$	2.0	$	5.9
Amortization of discount	—		2.3		2.4		6.7
Amortization of deferred financing costs	—		0.3		0.3		0.9
Total interest expense1	$	—	$	4.6	$	4.7	$	13.5

____________

¹  A portion of the interest relating to the Convertible Notes was capitalized as construction in progress.

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Guarantor and Non-Guarantor Financial Statements, Cash Flow Statements (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities:
Net cash provided by (used in) operating activities			$ 108.9	$ 103.7
Cash flows from investing activities:
Capital expenditures	$ (15.5)	$ (9.5)	(38.4)	(39.6)
Purchase of available for sale securities			(0.5)	(53.4)
Proceeds from disposition of available for sale securities			84.0	82.2
Change in restricted cash			0.0	(0.7)
Net cash provided by (used in) investing activities			45.1	(11.5)
Cash flows from financing activities:
Repurchase of Senior Notes2			(6.1)	0.0
Settlement of Convertible Notes2			(175.0)	0.0
Proceeds from cash-settled call options related to settlement of Convertible Notes2			94.9	0.0
Payment for conversion premium related to settlement of Convertible Notes2			(94.9)	0.0
Excess tax benefit upon vesting of non-vested shares and dividend payment on unvested shares expected to vest			1.1	0.8
Cancellation of shares to cover employees’ tax withholdings upon vesting of non-vested shares			(3.0)	(2.4)
Repurchase of common stock			(45.1)	(28.7)
Cash dividend paid to stockholders			(21.0)	(19.1)
Intercompany loan			0.0	0.0
Net cash used in financing activities			(249.1)	(49.4)
Net (decrease) increase in cash and cash equivalents during the period			(95.1)	42.8
Cash and cash equivalents at beginning of period			177.7	169.5
Cash and cash equivalents at end of period	82.6	212.3	82.6	212.3
Parent
Cash flows from operating activities:
Net cash provided by (used in) operating activities			250.2	13.9
Cash flows from investing activities:
Capital expenditures			0.0	0.0
Purchase of available for sale securities			0.0	0.0
Proceeds from disposition of available for sale securities			0.0	0.0
Change in restricted cash				0.0
Net cash provided by (used in) investing activities			0.0	0.0
Cash flows from financing activities:
Repurchase of Senior Notes2			(6.1)
Settlement of Convertible Notes2			(175.0)
Proceeds from cash-settled call options related to settlement of Convertible Notes2			94.9
Payment for conversion premium related to settlement of Convertible Notes2			(94.9)
Excess tax benefit upon vesting of non-vested shares and dividend payment on unvested shares expected to vest			0.0	0.0
Cancellation of shares to cover employees’ tax withholdings upon vesting of non-vested shares			(3.0)	(2.4)
Repurchase of common stock			(45.1)	(28.7)
Cash dividend paid to stockholders			(21.0)	(19.1)
Intercompany loan			0.0	31.3
Net cash used in financing activities			(250.2)	(18.9)
Net (decrease) increase in cash and cash equivalents during the period			0.0	(5.0)
Cash and cash equivalents at beginning of period			0.0	5.0
Cash and cash equivalents at end of period	0.0	0.0	0.0	0.0
Guarantor Subsidiaries
Cash flows from operating activities:
Net cash provided by (used in) operating activities			(140.8)	82.7
Cash flows from investing activities:
Capital expenditures			(26.0)	(38.1)
Purchase of available for sale securities			(0.5)	(53.4)
Proceeds from disposition of available for sale securities			84.0	82.2
Change in restricted cash				(0.7)
Net cash provided by (used in) investing activities			57.5	(10.0)
Cash flows from financing activities:
Repurchase of Senior Notes2			0.0
Settlement of Convertible Notes2			0.0
Proceeds from cash-settled call options related to settlement of Convertible Notes2			0.0
Payment for conversion premium related to settlement of Convertible Notes2			0.0
Excess tax benefit upon vesting of non-vested shares and dividend payment on unvested shares expected to vest			1.1	0.8
Cancellation of shares to cover employees’ tax withholdings upon vesting of non-vested shares			0.0	0.0
Repurchase of common stock			0.0	0.0
Cash dividend paid to stockholders			0.0	0.0
Intercompany loan			(13.5)	(22.6)
Net cash used in financing activities			(12.4)	(21.8)
Net (decrease) increase in cash and cash equivalents during the period			(95.7)	50.9
Cash and cash equivalents at beginning of period			175.3	157.7
Cash and cash equivalents at end of period	79.6	208.6	79.6	208.6
Non-Guarantor Subsidiaries
Cash flows from operating activities:
Net cash provided by (used in) operating activities			(0.5)	7.1
Cash flows from investing activities:
Capital expenditures			(12.4)	(1.5)
Purchase of available for sale securities			0.0	0.0
Proceeds from disposition of available for sale securities			0.0	0.0
Change in restricted cash				0.0
Net cash provided by (used in) investing activities			(12.4)	(1.5)
Cash flows from financing activities:
Repurchase of Senior Notes2			0.0
Settlement of Convertible Notes2			0.0
Proceeds from cash-settled call options related to settlement of Convertible Notes2			0.0
Payment for conversion premium related to settlement of Convertible Notes2			0.0
Excess tax benefit upon vesting of non-vested shares and dividend payment on unvested shares expected to vest			0.0	0.0
Cancellation of shares to cover employees’ tax withholdings upon vesting of non-vested shares			0.0	0.0
Repurchase of common stock			0.0	0.0
Cash dividend paid to stockholders			0.0	0.0
Intercompany loan			13.5	(8.7)
Net cash used in financing activities			13.5	(8.7)
Net (decrease) increase in cash and cash equivalents during the period			0.6	(3.1)
Cash and cash equivalents at beginning of period			2.4	6.8
Cash and cash equivalents at end of period	3.0	3.7	3.0	3.7
Consolidating Adjustments
Cash flows from operating activities:
Net cash provided by (used in) operating activities			0.0	0.0
Cash flows from investing activities:
Capital expenditures			0.0	0.0
Purchase of available for sale securities			0.0	0.0
Proceeds from disposition of available for sale securities			0.0	0.0
Change in restricted cash				0.0
Net cash provided by (used in) investing activities			0.0	0.0
Cash flows from financing activities:
Repurchase of Senior Notes2			0.0
Settlement of Convertible Notes2			0.0
Proceeds from cash-settled call options related to settlement of Convertible Notes2			0.0
Payment for conversion premium related to settlement of Convertible Notes2			0.0
Excess tax benefit upon vesting of non-vested shares and dividend payment on unvested shares expected to vest			0.0	0.0
Cancellation of shares to cover employees’ tax withholdings upon vesting of non-vested shares			0.0	0.0
Repurchase of common stock			0.0	0.0
Cash dividend paid to stockholders			0.0	0.0
Intercompany loan			0.0	0.0
Net cash used in financing activities			0.0	0.0
Net (decrease) increase in cash and cash equivalents during the period			0.0	0.0
Cash and cash equivalents at beginning of period			0.0	0.0
Cash and cash equivalents at end of period	$ 0.0	$ 0.0	$ 0.0	$ 0.0

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Guarantor and Non-Guarantor Financial Statements (Tables)

9 Months Ended

Sep. 30, 2015

Guarantor and Non-Guarantor Financial Statement [Abstract]

Schedule of Condensed Financial Statements

CONDENSED CONSOLIDATING BALANCE SHEET

(In millions of dollars)

September 30, 2015

	Parent		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Consolidating Adjustments			Consolidated
ASSETS
Current assets:
Cash and cash equivalents	$	—	$	79.6	$	3.0	$	—		$	82.6
Short-term investments	—		30.0		—		—			30.0
Receivables:
Trade receivables — net	—		127.8		3.8		—			131.6
Intercompany receivables	29.2		96.8		2.6		(128.6		)	—
Other	—		2.1		2.3		—			4.4
Inventories	—		213.7		6.0		(2.4		)	217.3
Prepaid expenses and other current assets	0.1		98.1		1.3		(0.9		)	98.6
Total current assets	29.3		648.1		19.0		(131.9		)	564.5
Investments in and advances to subsidiaries	1,057.2		32.3		—		(1,089.5		)	—
Property, plant and equipment — net	—		444.2		28.5		—			472.7
Long-term intercompany receivables	—		—		2.4		(2.4		)	—
Deferred tax assets — net	—		128.6		—		7.1			135.7
Intangible assets — net	—		30.9		—		—			30.9
Goodwill	—		37.2		—		—			37.2
Other assets	3.7		18.3		0.1		—			22.1
Total	$	1,090.2	$	1,339.6	$	50.0	$	(1,216.7	)	$	1,263.1
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	0.7	$	64.1	$	4.5	$	—		$	69.3
Intercompany payable	92.3		42.6		3.8		(138.7		)	—
Accrued salaries, wages and related expenses	—		35.5		2.9		—			38.4
Other accrued liabilities	6.0		55.6		0.7		(0.9		)	61.4
Short-term capital lease	—		0.1		—		—			0.1
Total current liabilities	99.0		197.9		11.9		(139.6		)	169.2
Net liabilities of Salaried VEBA	—		15.9		—		—			15.9
Deferred tax liabilities	—		—		0.8		—			0.8
Long-term intercompany payable	—		2.4		—		(2.4		)	—
Long-term liabilities	—		80.9		5.1		—			86.0
Long-term debt	218.9		—		—		—			218.9
Total liabilities	317.9		297.1		17.8		(142.0		)	490.8
Total stockholders’ equity	772.3		1,042.5		32.2		(1,074.7		)	772.3
Total	$	1,090.2	$	1,339.6	$	50.0	$	(1,216.7	)	$	1,263.1

CONDENSED CONSOLIDATING BALANCE SHEET

(In millions of dollars)

December 31, 2014

	Parent		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Consolidating Adjustments			Consolidated
ASSETS
Current assets:
Cash and cash equivalents	$	—	$	175.3	$	2.4	$	—		$	177.7
Short-term investments	—		114.0		—		—			114.0
Receivables:
Trade receivables — net	—		126.1		3.2		—			129.3
Intercompany receivables	204.2		4.0		0.9		(209.1		)	—
Other	—		5.6		5.3		—			10.9
Inventories	—		208.0		7.6		(0.9		)	214.7
Prepaid expenses and other current assets	85.1		93.1		0.4		—			178.6
Total current assets	289.3		726.1		19.8		(210.0		)	825.2
Investments in and advances to subsidiaries	1,209.2		32.5		—		(1,241.7		)	—
Property, plant and equipment — net	—		437.4		17.5		—			454.9
Long-term intercompany receivables	—		—		15.9		(15.9		)	—
Net assets of Union VEBA	—		340.1		—		—			340.1
Deferred tax assets — net	—		23.8		—		7.1			30.9
Intangible assets — net	—		32.1		—		—			32.1
Goodwill	—		37.2		—		—			37.2
Other assets	4.4		18.8		0.1		—			23.3
Total	$	1,502.9	$	1,648.0	$	53.3	$	(1,460.5	)	$	1,743.7
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	1.3	$	73.8	$	6.3	$	—		$	81.4
Intercompany payable	—		221.3		3.3		(224.6		)	—
Accrued salaries, wages and related expenses	—		36.5		3.1		—			39.6
Other accrued liabilities	88.2		43.8		0.8		—			132.8
Current portion of long-term debt	172.5		—		—		—			172.5
Short-term capital lease	—		0.1		—		—			0.1
Total current liabilities	262.0		375.5		13.5		(224.6		)	426.4
Net liabilities of Salaried VEBA	—		17.2		—		—			17.2
Deferred tax liabilities	—		—		0.9		—			0.9
Long-term intercompany payable	—		15.9		—		(15.9		)	—
Long-term liabilities	—		50.3		8.0		—			58.3
Long-term debt	225.0		—		—		—			225.0
Total liabilities	487.0		458.9		22.4		(240.5		)	727.8
Total stockholders’ equity	1,015.9		1,189.1		30.9		(1,220.0		)	1,015.9
Total	$	1,502.9	$	1,648.0	$	53.3	$	(1,460.5	)	$	1,743.7

CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME (LOSS)

(In millions of dollars)

Quarter Ended September 30, 2015

	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
Net sales	$	—		$	329.5		$	29.4		$	(22.5	)	$	336.4
Costs and expenses:
Cost of products sold:
Cost of products sold, excluding depreciation and amortization and other items	—			263.1			25.3			(21.1		)	267.3
Unrealized losses on derivative instruments	—			1.7			—			—			1.7
Depreciation and amortization	—			7.8			0.3			—			8.1
Selling, general, administrative, research and development:
Selling, general, administrative, research and development	0.9			18.4			2.4			(0.6		)	21.1
Net periodic postretirement benefit cost relating to Salaried VEBA	—			0.6			—			—			0.6
Gain on removal of Union VEBA net assets	—			(2.9		)	—			—			(2.9		)
Total selling, general, administrative, research and development	0.9			16.1			2.4			(0.6		)	18.8
Total costs and expenses	0.9			288.7			28.0			(21.7		)	295.9
Operating (loss) income	(0.9		)	40.8			1.4			(0.8		)	40.5
Other (expense) income:
Interest expense	(4.7		)	(0.3		)	—			0.1			(4.9		)
Other (expense) income, net	(0.6		)	2.2			(2.4		)	(0.1		)	(0.9		)
(Loss) income before income taxes	(6.2		)	42.7			(1.0		)	(0.8		)	34.7
Income tax (provision) benefit	—			(15.6		)	0.8			2.2			(12.6		)
Earnings (loss) in equity of subsidiaries	28.3			(1.0		)	—			(27.3		)	—
Net income (loss)	$	22.1		$	26.1		$	(0.2	)	$	(25.9	)	$	22.1
Comprehensive income (loss)	$	22.2		$	26.5		$	(0.5	)	$	(26.0	)	$	22.2

CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE (LOSS) INCOME

(In millions of dollars)

Nine Months Ended September 30, 2015

	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
Net sales	$	—		$	1,051.2		$	97.6		$	(73.5	)	$	1,075.3
Costs and expenses:
Cost of products sold:
Cost of products sold, excluding depreciation and amortization and other items	—			848.9			85.8			(70.3		)	864.4
Unrealized loss on derivative instruments	—			7.7			—			—			7.7
Depreciation and amortization	—			23.3			0.9			—			24.2
Selling, general, administrative, research and development:
Selling, general, administrative, research and development	3.3			58.6			7.2			(1.7		)	67.4
Net periodic postretirement benefit cost relating to Salaried VEBA	—			1.8			—			—			1.8
Loss on removal of Union VEBA net assets	—			490.9			—			—			490.9
Total selling, general, administrative, research and development	3.3			551.3			7.2			(1.7		)	560.1
Total costs and expenses	3.3			1,431.2			93.9			(72.0		)	1,456.4
Operating (loss) income	(3.3		)	(380.0		)	3.7			(1.5		)	(381.1		)
Other (expense) income:
Interest expense	(19.1		)	(1.1		)	—			0.3			(19.9		)
Other (expense) income, net	(0.6		)	3.0			(2.2		)	(0.3		)	(0.1		)
(Loss) income before income taxes	(23.0		)	(378.1		)	1.5			(1.5		)	(401.1		)
Income tax benefit	—			140.5			2.2			8.5			151.2
(Loss) earnings in equity of subsidiaries	(226.9		)	2.2			—			224.7			—
Net (loss) income	$	(249.9	)	$	(235.4	)	$	3.7		$	231.7		$	(249.9	)
Comprehensive (loss) income	$	(182.5	)	$	(167.8	)	$	3.5		$	164.3		$	(182.5	)

CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME

(In millions of dollars)

Quarter Ended September 30, 2014

	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
Net sales	$	—		$	330.3		$	33.6		$	(25.0	)	$	338.9
Costs and expenses:
Cost of products sold:
Cost of products sold, excluding depreciation and amortization and other items	—			274.7			29.8			(24.1		)	280.4
Unrealized gains on derivative instruments	—			3.6			—			—			3.6
Depreciation and amortization	—			7.7			0.3			—			8.0
Selling, general, administrative, research and development:
Selling, general, administrative, research and development	0.9			17.2			1.7			(0.8		)	19.0
Net periodic postretirement benefit income relating to VEBAs	—			(6.0		)	—			—			(6.0		)
Total selling, general, administrative, research and development	0.9			11.2			1.7			(0.8		)	13.0
Other operating charges, net	—			1.3			—			—			1.3
Total costs and expenses	0.9			298.5			31.8			(24.9		)	306.3
Operating (loss) income	(0.9		)	31.8			1.8			(0.1		)	32.6
Other (expense) income:
Interest expense	(9.4		)	(0.5		)	—			0.2			(9.7		)
Other income (expense), net	2.2			0.3			(0.1		)	(0.2		)	2.2
(Loss) income before income taxes	(8.1		)	31.6			1.7			(0.1		)	25.1
Income tax (provision) benefit	—			(11.9		)	(0.1		)	2.8			(9.2		)
Earnings in equity of subsidiaries	24.0			1.6			—			(25.6		)	—
Net income	$	15.9		$	21.3		$	1.6		$	(22.9	)	$	15.9
Comprehensive income	$	17.2		$	22.5		$	1.7		$	(24.2	)	$	17.2

CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME

(In millions of dollars)

Nine Months Ended September 30, 2014

	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
Net sales	$	—		$	993.1		$	100.7		$	(75.7	)	$	1,018.1
Costs and expenses:
Cost of products sold:
Cost of products sold, excluding depreciation and amortization and other items	—			824.4			87.9			(73.5		)	838.8
Unrealized gains on derivative instruments	—			—			—			—			—
Depreciation and amortization	—			22.3			0.8			—			23.1
Selling, general, administrative, research and development:
Selling, general, administrative, research and development	3.1			52.3			7.9			(2.0		)	61.3
Net periodic postretirement benefit income relating to VEBAs	—			(17.7		)	—			—			(17.7		)
Total selling, general, administrative, research and development	3.1			34.6			7.9			(2.0		)	43.6
Other operating charges, net	—			1.5			—			—			1.5
Total costs and expenses	3.1			882.8			96.6			(75.5		)	907.0
Operating (loss) income	(3.1		)	110.3			4.1			(0.2		)	111.1
Other (expense) income:
Interest expense	(28.0		)	(0.1		)	—			0.4			(27.7		)
Other income, net	3.6			2.3			0.4			(0.4		)	5.9
(Loss) income before income taxes	(27.5		)	112.5			4.5			(0.2		)	89.3
Income tax (provision) benefit	—			(42.3		)	(0.9		)	10.1			(33.1		)
Earnings in equity of subsidiaries	83.7			3.4			—			(87.1		)	—
Net income	$	56.2		$	73.6		$	3.6		$	(77.2	)	$	56.2
Comprehensive income	$	60.5		$	77.7		$	3.8		$	(81.5	)	$	60.5

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

(In millions of dollars)

Nine Months Ended September 30, 2015

	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating Adjustments		Consolidated
Cash flows from operating activities:
Net cash provided by (used in) operating activities	$	250.2		$	(140.8	)	$	(0.5	)	$	—	$	108.9
Cash flows from investing activities:
Capital expenditures	—			(26.0		)	(12.4		)	—		(38.4		)
Purchase of available for sale securities	—			(0.5		)	—			—		(0.5		)
Proceeds from disposition of available for sale securities	—			84.0			—			—		84.0
Net cash provided by (used in) investing activities	—			57.5			(12.4		)	—		45.1
Cash flows from financing activities:
Repurchase of Senior Notes	(6.1		)	—			—			—		(6.1		)
Settlement of Convertible Notes	(175.0		)	—			—			—		(175.0		)
Proceeds from cash-settled call options related to settlement of Convertible Notes	94.9			—			—			—		94.9
Payment for conversion premium related to settlement of Convertible Notes	(94.9		)	—			—			—		(94.9		)
Excess tax benefit upon vesting of non-vested shares and dividend payment on unvested shares expected to vest	—			1.1			—			—		1.1
Cancellation of shares to cover employees’ tax withholdings upon vesting of non-vested shares	(3.0		)	—			—			—		(3.0		)
Repurchase of common stock	(45.1		)	—			—			—		(45.1		)
Cash dividend paid to stockholders	(21.0		)	—			—			—		(21.0		)
Intercompany loan	—			(13.5		)	13.5			—		—
Net cash (used in) provided by financing activities	(250.2		)	(12.4		)	13.5			—		(249.1		)
Net (decrease) increase in cash and cash equivalents during the period	—			(95.7		)	0.6			—		(95.1		)
Cash and cash equivalents at beginning of period	—			175.3			2.4			—		177.7
Cash and cash equivalents at end of period	$	—		$	79.6		$	3.0		$	—	$	82.6

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

(In millions of dollars)

Nine Months Ended September 30, 2014

	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating Adjustments		Consolidated
Cash flows from operating activities:
Net cash provided by operating activities	$	13.9		$	82.7		$	7.1		$	—	$	103.7
Cash flows from investing activities:
Capital expenditures	—			(38.1		)	(1.5		)	—		(39.6		)
Purchase of available for sale securities	—			(53.4		)	—			—		(53.4		)
Proceeds from disposition of available for sale securities	—			82.2			—			—		82.2
Change in restricted cash	—			(0.7		)	—			—		(0.7		)
Net cash used in investing activities	—			(10.0		)	(1.5		)	—		(11.5		)
Cash flows from financing activities:
Excess tax benefit upon vesting of non-vested shares and dividend payment on unvested shares expected to vest	—			0.8			—			—		0.8
Cancellation of shares to cover employees’ tax withholdings upon vesting of non-vested shares	(2.4		)	—			—			—		(2.4		)
Repurchase of common stock	(28.7		)	—			—			—		(28.7		)
Cash dividend paid to stockholders	(19.1		)	—			—			—		(19.1		)
Intercompany loan	31.3			(22.6		)	(8.7		)	—		—
Net cash used in financing activities	(18.9		)	(21.8		)	(8.7		)	—		(49.4		)
Net increase (decrease) in cash and cash equivalents during the period	(5.0		)	50.9			(3.1		)	—		42.8
Cash and cash equivalents at beginning of period	5.0			157.7			6.8			—		169.5
Cash and cash equivalents at end of period	$	—		$	208.6		$	3.7		$	—	$	212.3

XML

Supplemental Cash Flow Information

9 Months Ended

Sep. 30, 2015

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow Information

Supplemental Cash Flow Information

	Nine Months Ended
	September 30,
	2015		2014
	(In millions of dollars)
Interest paid	$	13.5	$	12.2
Non-cash investing and financing activities:
Stock repurchases not yet settled (accrued in accounts payable)	$	0.3	$	0.2
Unpaid purchases of property and equipment	$	4.4	$	1.8