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v2.4.1.9

Long-Term Debt and Credit Facility, Textuals (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified | 3 Months Ended | 0 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | May 23, 2012 | Apr. 01, 2015 | Dec. 31, 2014 | Mar. 29, 2010
Long-term debt |  |  |  |  |  |
Derivative Asset | $ 95,100,000 us-gaap_DerivativeAssets |  |  |  | $ 85,700,000 us-gaap_DerivativeAssets |
Trading days warrants are exercisable | 120 days |  |  |  |  |
Payment of quarterly cash dividends | $ 0.40 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.35 us-gaap_CommonStockDividendsPerShareCashPaid |  |  |  |
Warrant Transactions |  |  |  |  |  |
Long-term debt |  |  |  |  |  |
Common stock sold related to option counterparties net-share-settled warrants | 3.7 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_FinancialInstrumentAxis = us-gaap_WarrantMember |  |  |  |  |
Exercise price per share of Warrants | $ 60.57 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_FinancialInstrumentAxis = us-gaap_WarrantMember |  |  |  |  |
Senior Notes |  |  |  |  |  |
Long-term debt |  |  |  |  |  |
Principal amount of notes |  |  | 225,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = us-gaap_SeniorNotesMember |  |  |
Interest rate |  |  | 8.25%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = us-gaap_SeniorNotesMember |  |  |
Percentage of principal amount issued |  |  | 100.00%kalu_DebtInstrumentPercentageofPrincipalAmountIssued / us-gaap_DebtInstrumentAxis = us-gaap_SeniorNotesMember |  |  |
Interest expense including amortization of deferred financing costs | 4,800,000 us-gaap_InterestExpenseLongTermDebt / us-gaap_DebtInstrumentAxis = us-gaap_SeniorNotesMember |  |  |  |  |
Revolving Credit Facility |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |
Maximum borrowing capacity | 300,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_DebtInstrumentAxis = us-gaap_RevolvingCreditFacilityMember |  |  |  |  |
Available borrowing capacity | 281,700,000 us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity / us-gaap_DebtInstrumentAxis = us-gaap_RevolvingCreditFacilityMember |  |  |  |  |
Remaining available borrowing capacity | 274,100,000 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_DebtInstrumentAxis = us-gaap_RevolvingCreditFacilityMember |  |  |  |  |
Interest on Revolving Credit Facility | 4.00%us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd / us-gaap_DebtInstrumentAxis = us-gaap_RevolvingCreditFacilityMember |  |  |  |  |
Line of Credit |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |
Outstanding line of credit | 0 us-gaap_LineOfCredit / us-gaap_DebtInstrumentAxis = us-gaap_LineOfCreditMember |  |  |  |  |
Letter of Credit |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |
Outstanding line of credit | (7,600,000)us-gaap_LineOfCredit / us-gaap_DebtInstrumentAxis = us-gaap_LetterOfCreditMember |  |  |  |  |
Minimum |  |  |  |  |  |
Long-term debt |  |  |  |  |  |
Payment of quarterly cash dividends | $ 0.24 us-gaap_CommonStockDividendsPerShareCashPaid / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |
Convertible Notes |  |  |  |  |  |
Long-term debt |  |  |  |  |  |
Principal amount of notes |  |  |  |  |  | 175,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember
Interest rate |  |  |  |  |  | 4.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember
Number of convertible notes not presented for conversion | 5 kalu_Numberofconvertiblenotesnotpresentedforconversion / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |
Debt Instrument, Redemption Price, Percentage | 154.261%us-gaap_DebtInstrumentRedemptionPricePercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |
Consecutive trading days threshold for conversion | 50 days |  |  |  |  |
Subsequent Event [Member] | Convertible Notes |  |  |  |  |  |
Long-term debt |  |  |  |  |  |
Short-term Debt, Fair Value |  |  |  | 273,800,000 us-gaap_ShorttermDebtFairValue / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |
Debt Instrument, Periodic Payment |  |  |  | 3,900,000 us-gaap_DebtInstrumentPeriodicPayment / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |
Principal amount in conversion feature |  |  |  | 175,000,000 kalu_PrincipalAmountInConversionFeature / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |
Debt Instrument, Convertible, If-converted Value in Excess of Principal |  |  |  | 94,900,000 us-gaap_DebtInstrumentConvertibleIfConvertedValueInExcessOfPrincipal / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |
Derivative Asset |  |  |  | 94,900,000 us-gaap_DerivativeAssets / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |
Net cash outflow in convertible debt settlement |  |  |  | $ 178,900,000 kalu_Netcashoutflowinconvertibledebtsettlement / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |

X
- Definition Debt Instrument, Percentage of Principal Amount Issued + References No definition available. + Details
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- Definition Net cash outflow in convertible debt settlement + References No definition available. + Details
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Balance Type: | credit
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- Definition Number of convertible notes not presented for conversion + References No definition available. + Details
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- Definition Principal amount in conversion feature + References No definition available. + Details
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- Definition Trading days warrants are exercisable + References No definition available. + Details
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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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X
- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition The amount by which the convertible debt's if-converted value exceeds its principle amount at the balance sheet date, regardless of whether the instrument is currently convertible. This element applies to public companies only. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6928298&loc=SL6031898-161870 + Details
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- Definition Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instruments must exceed threshold percentage for a specified number of trading days to trigger conversion feature, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 + Details
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Balance Type: | credit
Period Type: | instant

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of the required periodic payments including both interest and principal payments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 + Details
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- Definition Percentage price of original principal amount of debt at which debt can be redeemed by the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph e -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 + Details
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- Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13433-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13495-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226008-175313 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 + Details
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- Definition Aggregate amount of interest paid or due on all long-term debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.8) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Details
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- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The effective interest rate at the end of the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount of short-term debt existing as of the balance sheet date. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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