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Guarantor and Non-Guarantor Financial Statements (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended |  | 3 Months Ended | 6 Months Ended |  | 3 Months Ended | 6 Months Ended |  | 3 Months Ended | 6 Months Ended |  | 3 Months Ended | 6 Months Ended |  |
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Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Dec. 31, 2012 | Jun. 30, 2013 Parent | Jun. 30, 2012 Parent | Jun. 30, 2013 Parent | Jun. 30, 2012 Parent | Dec. 31, 2012 Parent | Jun. 30, 2013 Guarantor Subsidiaries | Jun. 30, 2012 Guarantor Subsidiaries | Jun. 30, 2013 Guarantor Subsidiaries | Jun. 30, 2012 Guarantor Subsidiaries | Dec. 31, 2012 Guarantor Subsidiaries | Jun. 30, 2013 Non-Guarantor Subsidiaries | Jun. 30, 2012 Non-Guarantor Subsidiaries | Jun. 30, 2013 Non-Guarantor Subsidiaries | Jun. 30, 2012 Non-Guarantor Subsidiaries | Dec. 31, 2012 Non-Guarantor Subsidiaries | Jun. 30, 2013 Consolidating Adjustments | Jun. 30, 2012 Consolidating Adjustments | Jun. 30, 2013 Consolidating Adjustments | Jun. 30, 2012 Consolidating Adjustments | Dec. 31, 2012 Consolidating Adjustments | May 23, 2012 Senior Notes
Condensed Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount of notes | $ 225.0 |  | $ 225.0 |  |  | $ 225.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 225.0
Ownership interest by parent | 100.00% |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | 281.7 | 317.8 | 281.7 | 317.8 |  |  | 5.0 | 5.0 | 5.0 | 5.0 |  |  | 275.7 | 311.9 | 275.7 | 311.9 |  |  | 1.0 | 0.9 | 1.0 | 0.9 |  |  | 0 | 0 | 0 | 0 |  |  |
Short-term investments | 47.3 |  | 47.3 |  |  | 85.0 | 0 |  | 0 |  |  | 0 | 47.3 |  | 47.3 |  |  | 85.0 | 0 |  | 0 |  |  | 0 | 0 |  | 0 |  |  | 0 |
Receivables: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade, less allowance for doubtful receivables | 122.7 |  | 122.7 |  |  | 123.8 | 0 |  | 0 |  |  | 0 | 120.0 |  | 120.0 |  |  | 121.5 | 2.7 |  | 2.7 |  |  | 2.3 | 0 |  | 0 |  |  | 0 |
Intercompany receivables | 0 |  | 0 |  |  | 0 | 0 |  | 0 |  |  | 0 | 0.1 |  | 0.1 |  |  | (10.3) | 0.4 |  | 0.4 |  |  | 0.4 | (0.5) |  | (0.5) |  |  | 9.9 |
Other | 11.6 |  | 11.6 |  |  | 3.4 | 0 |  | 0 |  |  | 0 | 1.5 |  | 1.5 |  |  | 1.3 | 10.1 |  | 10.1 |  |  | 2.1 | 0 |  | 0 |  |  | 0 |
Inventories | 202.9 |  | 202.9 |  |  | 186.0 | 0 |  | 0 |  |  | 0 | 195.4 |  | 195.4 |  |  | 178.7 | 8.0 |  | 8.0 |  |  | 7.3 | (0.5) |  | (0.5) |  |  | 0 |
Prepaid expenses and other current assets | 70.1 |  | 70.1 |  |  | 70.1 | 0 |  | 0 |  |  | 0 | 68.2 |  | 68.2 |  |  | 68.1 | 1.9 |  | 1.9 |  |  | 2.0 | 0 |  | 0 |  |  | 0 |
Total current assets | 736.3 |  | 736.3 |  |  | 741.7 | 5.0 |  | 5.0 |  |  | 5.0 | 708.2 |  | 708.2 |  |  | 710.3 | 24.1 |  | 24.1 |  |  | 16.5 | (1.0) |  | (1.0) |  |  | 9.9 |
Investments in and advances to unconsolidated affiliates | 0 |  | 0 |  |  | 0 | 1,364.1 |  | 1,364.1 |  |  | 1,284.1 | 16.3 |  | 16.3 |  |  | 7.4 | 0 |  | 0 |  |  | 0 | (1,380.4) |  | (1,380.4) |  |  | (1,291.5) |
Property, plant, and equipment – net | 398.3 |  | 398.3 |  |  | 384.3 | 0 |  | 0 |  |  | 0 | 385.3 |  | 385.3 |  |  | 371.8 | 13.0 |  | 13.0 |  |  | 12.5 | 0 |  | 0 |  |  | 0 |
Long-term intercompany receivables | 0 |  | 0 |  |  | 0 | 95.6 |  | 95.6 |  |  | 163.7 | 1.3 |  | 1.3 |  |  | 0.4 | 10.5 |  | 10.5 |  |  | 6.4 | (107.4) |  | (107.4) |  |  | (170.5) |
Net asset in respect of VEBA | 379.1 |  | 379.1 |  |  | 365.9 | 0 |  | 0 |  |  | 0 | 379.1 |  | 379.1 |  |  | 365.9 | 0 |  | 0 |  |  | 0 | 0 |  | 0 |  |  | 0 |
Deferred tax assets (liabilities) — net | 75.8 |  | 75.8 |  |  | 102.0 | 0 |  | 0 |  |  | 0 | 67.5 |  | 67.5 |  |  | 93.4 | (1.0) |  | (1.0) |  |  | (0.8) | 9.3 |  | 9.3 |  |  | 9.4 |
Intangible assets – net | 34.5 |  | 34.5 |  |  | 35.4 | 0 |  | 0 |  |  | 0 | 34.5 |  | 34.5 |  |  | 35.4 | 0 |  | 0 |  |  | 0 | 0 |  | 0 |  |  | 0 |
Goodwill | 37.2 |  | 37.2 |  |  | 37.2 | 0 |  | 0 |  |  | 0 | 37.2 |  | 37.2 |  |  | 37.2 | 0 |  | 0 |  |  | 0 | 0 |  | 0 |  |  | 0 |
Other assets | 78.5 |  | 78.5 |  |  | 86.0 | 59.9 |  | 59.9 |  |  | 64.0 | 18.5 |  | 18.5 |  |  | 19.2 | 0.1 |  | 0.1 |  |  | 3.0 | 0 |  | 0 |  |  | (0.2) |
Total | 1,739.7 |  | 1,739.7 |  |  | 1,752.5 | 1,524.6 |  | 1,524.6 |  |  | 1,516.8 | 1,647.9 |  | 1,647.9 |  |  | 1,641.0 | 46.7 |  | 46.7 |  |  | 37.6 | (1,479.5) |  | (1,479.5) |  |  | (1,442.9) |
Current liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts payable | 73.2 |  | 73.2 |  |  | 62.5 | 0.5 |  | 0.5 |  |  | 0.1 | 64.3 |  | 64.3 |  |  | 56.5 | 8.4 |  | 8.4 |  |  | 5.9 | 0 |  | 0 |  |  | 0 |
Intercompany payable | 0 |  | 0 |  |  | 0 | 0 |  | 0 |  |  | 0 | 7.5 |  | 7.5 |  |  | 0.3 | 0.2 |  | 0.2 |  |  | 0.2 | (7.7) |  | (7.7) |  |  | (0.5) |
Accrued salaries, wages, and related expenses | 33.7 |  | 33.7 |  |  | 39.3 | 0 |  | 0 |  |  | 0 | 30.5 |  | 30.5 |  |  | 36.7 | 3.2 |  | 3.2 |  |  | 2.6 | 0 |  | 0 |  |  | 0 |
Other accrued liabilities | 39.9 |  | 39.9 |  |  | 51.8 | 3.5 |  | 3.5 |  |  | 3.5 | 35.3 |  | 35.3 |  |  | 47.8 | 1.1 |  | 1.1 |  |  | 0.5 | 0 |  | 0 |  |  | 0 |
Payable to affiliate | 0 |  | 0 |  |  | 7.9 |  |  |  |  |  | 0 |  |  |  |  |  | 7.9 |  |  |  |  |  | 0 |  |  |  |  |  | 0 |
Short-term capital lease | 0.3 |  | 0.3 |  |  | 0.1 | 0 |  | 0 |  |  | 0 | 0.3 |  | 0.3 |  |  | 0.1 | 0 |  | 0 |  |  | 0 | 0 |  | 0 |  |  | 0 |
Total current liabilities | 147.1 |  | 147.1 |  |  | 161.6 | 4.0 |  | 4.0 |  |  | 3.6 | 137.9 |  | 137.9 |  |  | 149.3 | 12.9 |  | 12.9 |  |  | 9.2 | (7.7) |  | (7.7) |  |  | (0.5) |
Net liability in respect of VEBA | 4.5 |  | 4.5 |  |  | 5.3 | 0 |  | 0 |  |  | 0 | 4.5 |  | 4.5 |  |  | 5.3 | 0 |  | 0 |  |  | 0 | 0 |  | 0 |  |  | 0 |
Long-term intercompany payable | 0 |  | 0 |  |  | 0 | 0 |  | 0 |  |  | 0 | 106.1 |  | 106.1 |  |  | 170.0 | 1.3 |  | 1.3 |  |  | 0.5 | (107.4) |  | (107.4) |  |  | (170.5) |
Long-term liabilities | 127.0 |  | 127.0 |  |  | 134.5 | 59.5 |  | 59.5 |  |  | 62.1 | 48.9 |  | 48.9 |  |  | 49.6 | 18.6 |  | 18.6 |  |  | 22.8 | 0 |  | 0 |  |  | 0 |
Long-term debt | 384.3 |  | 384.3 |  |  | 380.3 | 384.3 |  | 384.3 |  |  | 380.3 | 0 |  | 0 |  |  | 0 | 0 |  | 0 |  |  | 0 | 0 |  | 0 |  |  | 0 |
Total liabilities | 662.9 |  | 662.9 |  |  | 681.7 | 447.8 |  | 447.8 |  |  | 446.0 | 297.4 |  | 297.4 |  |  | 374.2 | 32.8 |  | 32.8 |  |  | 32.5 | (115.1) |  | (115.1) |  |  | (171.0) |
Total stockholders’ equity | 1,076.8 |  | 1,076.8 |  |  | 1,070.8 | 1,076.8 |  | 1,076.8 |  |  | 1,070.8 | 1,350.5 |  | 1,350.5 |  |  | 1,266.8 | 13.9 |  | 13.9 |  |  | 5.1 | (1,364.4) |  | (1,364.4) |  |  | (1,271.9) |
Total | 1,739.7 |  | 1,739.7 |  |  | 1,752.5 | 1,524.6 |  | 1,524.6 |  |  | 1,516.8 | 1,647.9 |  | 1,647.9 |  |  | 1,641.0 | 46.7 |  | 46.7 |  |  | 37.6 | (1,479.5) |  | (1,479.5) |  |  | (1,442.9) |
CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales | 328.9 | 345.2 | 666.3 | 710.6 |  |  | 0 | 0 | 0 | 0 |  |  | 324.7 | 335.0 | 656.5 | 690.5 |  |  | 29.6 | 32.1 | 60.0 | 64.7 |  |  | (25.4) | (21.9) | (50.2) | (44.6) |  |  |
Cost of products sold: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cost of products sold, excluding depreciation and amortization and other items | 261.5 | 284.4 | 525.1 | 582.5 |  |  | 0 | 0 | 0 | 0 |  |  | 258.9 | 276.8 | 518.6 | 567.3 |  |  | 26.3 | 29.0 | 53.3 | 58.9 |  |  | (23.7) | (21.4) | (46.8) | (43.7) |  |  |
Unrealized losses (gains) on derivative instruments | 4.2 | 0.1 | 4.9 | (3.0) |  |  | 0 | 0 | 0 | 0 |  |  | 4.2 | 0.1 | 4.9 | (3.0) |  |  | 0 | 0 | 0 | 0 |  |  | 0 | 0 | 0 | 0 |  |  |
Depreciation and amortization | 7.0 | 6.6 | 14.0 | 12.9 |  |  | 0 | 0 | 0 | 0 |  |  | 6.8 | 6.3 | 13.5 | 12.4 |  |  | 0.2 | 0.3 | 0.5 | 0.5 |  |  | 0 | 0 | 0 | 0 |  |  |
Selling, administrative, research and development, and general | 16.1 | 14.4 | 32.2 | 32.3 |  |  | 1.1 | 0.8 | 1.5 | 1.3 |  |  | 14.5 | 13.5 | 29.3 | 31.2 |  |  | 2.1 | 0.7 | 4.5 | 0.7 |  |  | (1.6) | (0.6) | (3.1) | (0.9) |  |  |
Other operating charges, net |  | 0.1 |  | 0.1 |  |  |  | 0 |  | 0 |  |  |  | 0.1 |  | 0.1 |  |  |  | 0 |  | 0 |  |  |  | 0 |  | 0 |  |  |
Total costs and expenses | 288.8 | 305.6 | 576.2 | 624.8 |  |  | 1.1 | 0.8 | 1.5 | 1.3 |  |  | 284.4 | 296.8 | 566.3 | 608.0 |  |  | 28.6 | 30.0 | 58.3 | 60.1 |  |  | (25.3) | (22.0) | (49.9) | (44.6) |  |  |
Operating (loss) income | 40.1 | 39.6 | 90.1 | 85.8 |  |  | (1.1) | (0.8) | (1.5) | (1.3) |  |  | 40.3 | 38.2 | 90.2 | 82.5 |  |  | 1.0 | 2.1 | 1.7 | 4.6 |  |  | (0.1) | 0.1 | (0.3) | 0 |  |  |
Other (expense) income: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense | (9.0) | (6.5) | (18.3) | (10.6) |  |  | (9.0) | (6.2) | (18.1) | (10.2) |  |  | 0 | (0.3) | (0.3) | (0.4) |  |  | 0 | 0 | 0 | 0 |  |  | 0 | 0 | 0.1 | 0 |  |  |
Other income, net | (0.8) | 1.1 | 0.2 | 1.8 |  |  | (0.9) | 0.7 | (0.5) | 1.2 |  |  | 0.3 | 0.3 | 0.9 | 0.5 |  |  | (0.2) | 0.1 | (0.1) | 0.1 |  |  | 0 | 0 | (0.1) | 0 |  |  |
(Loss) income before income taxes | 30.3 | 34.2 | 72.0 | 77.0 |  |  | (11.0) | (6.3) | (20.1) | (10.3) |  |  | 40.6 | 38.2 | 90.8 | 82.6 |  |  | 0.8 | 2.2 | 1.6 | 4.7 |  |  | (0.1) | 0.1 | (0.3) | 0 |  |  |
Income tax (provision) benefit | (11.7) | (13.2) | (19.9) | (29.5) |  |  | 0 | 0 | 0 | 0 |  |  | (15.1) | (14.7) | (34.1) | (31.5) |  |  | (0.7) | (0.7) | 6.5 | (1.4) |  |  | 4.1 | 2.2 | 7.7 | 3.4 |  |  |
Earnings in equity of subsidiaries | 0 | 0 | 0 | 0 |  |  | 29.6 | 27.3 | 72.2 | 57.8 |  |  | (0.1) | 1.6 | 7.7 | 3.3 |  |  | 0 | 0 | 0 | 0 |  |  | (29.5) | (28.9) | (79.9) | (61.1) |  |  |
Net income | 18.6 | 21.0 | 52.1 | 47.5 |  |  | 18.6 | 21.0 | 52.1 | 47.5 |  |  | 25.4 | 25.1 | 64.4 | 54.4 |  |  | 0.1 | 1.5 | 8.1 | 3.3 |  |  | (25.5) | (26.6) | (72.5) | (57.7) |  |  |
Comprehensive income | 19.9 | 22.5 | 54.6 | 50.1 |  |  | 19.9 | 22.5 | 54.6 | 50.1 |  |  | 26.3 | 26.2 | 66.1 | 56.9 |  |  | 0.5 | 1.9 | 8.9 | 3.4 |  |  | (26.8) | (28.1) | (75.0) | (60.3) |  |  |
Cash flows from operating activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net cash (used in) provided by operating activities |  |  | 48.9 | 74.7 |  |  |  |  | (14.4) | (3.5) |  |  |  |  | 60.4 | 78.5 |  |  |  |  | 2.9 | (0.3) |  |  |  |  | 0 | 0 |  |  |
Cash flows from investing activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital expenditures | (16.7) | (7.9) | (26.0) | (16.9) |  |  |  |  | 0 | 0 |  |  |  |  | (25.0) | (16.4) |  |  |  |  | (1.0) | (0.5) |  |  |  |  | 0 | 0 |  |  |
Purchase of available for sale securities |  |  | (98.2) | (0.3) |  |  |  |  | 0 | 0 |  |  |  |  | (98.2) | (0.3) |  |  |  |  | 0 | 0 |  |  |  |  | 0 | 0 |  |  |
Proceeds from sale of available for sale securities |  |  | 135.7 | 0 |  |  |  |  | 0 |  |  |  |  |  | 135.7 |  |  |  |  |  | 0 |  |  |  |  |  | 0 |  |  |  |
Change in restricted cash |  |  | 0.7 | 7.2 |  |  |  |  | 0 | 6.9 |  |  |  |  | 0.7 | 0.3 |  |  |  |  | 0 | 0 |  |  |  |  | 0 | 0 |  |  |
Net cash provided by (used in) investing activities |  |  | 12.2 | (10.0) |  |  |  |  | 0 | 6.9 |  |  |  |  | 13.2 | (16.4) |  |  |  |  | (1.0) | (0.5) |  |  |  |  | 0 | 0 |  |  |
Cash flows from financing activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of senior notes |  |  | 0 | 225.0 |  |  |  |  |  | 225.0 |  |  |  |  |  | 0 |  |  |  |  |  | 0 |  |  |  |  |  | 0 |  |  |
Cash paid for financing costs |  |  | 0 | (6.4) |  |  |  |  |  | (6.4) |  |  |  |  |  | 0 |  |  |  |  |  | 0 |  |  |  |  |  | 0 |  |  |
Repayment of promissory notes |  |  | 0 | (4.7) |  |  |  |  |  | 0 |  |  |  |  |  | (4.7) |  |  |  |  |  | 0 |  |  |  |  |  | 0 |  |  |
Excess tax benefit upon vesting of non-vested shares and dividend payment on unvested shares expected to vest |  |  | 0.9 | 1.3 |  |  |  |  | 0 | 0 |  |  |  |  | 0.9 | 1.3 |  |  |  |  | 0 | 0 |  |  |  |  | 0 | 0 |  |  |
Cancellation of shares to cover employees’ tax withholdings upon vesting of non-vested shares |  |  | (2.2) | (2.1) |  |  |  |  | (2.2) | (2.1) |  |  |  |  | 0 | 0 |  |  |  |  | 0 | 0 |  |  |  |  | 0 | 0 |  |  |
Cash dividend paid to stockholders |  |  | (11.6) | (9.8) |  |  |  |  | (11.6) | (9.8) |  |  |  |  | 0 | 0 |  |  |  |  | 0 | 0 |  |  |  |  | 0 | 0 |  |  |
Repurchase of common stock |  |  | (39.9) | 0 |  |  |  |  | (39.9) |  |  |  |  |  | 0 |  |  |  |  |  | 0 |  |  |  |  |  | 0 |  |  |  |
Intercompany loan |  |  | 0 | 0 | [1] |  |  |  | 68.1 | (210.1) | [1] |  |  |  | (64.8) | 210.2 | [1] |  |  |  | (3.3) | (0.1) | [1] |  |  |  | 0 | 0 | [1] |  |
Net cash provided by (used in) financing activities |  |  | (52.8) | 203.3 |  |  |  |  | 14.4 | (3.4) |  |  |  |  | (63.9) | 206.8 |  |  |  |  | (3.3) | (0.1) |  |  |  |  | 0 | 0 |  |  |
Net increase (decrease) in cash and cash equivalents during the period |  |  | 8.3 | 268.0 |  |  |  |  | 0 | 0 |  |  |  |  | 9.7 | 268.9 |  |  |  |  | (1.4) | (0.9) |  |  |  |  | 0 | 0 |  |  |
Cash and cash equivalents at beginning of period |  |  | 273.4 | 49.8 |  |  |  |  | 5.0 | 5.0 |  |  |  |  | 266.0 | 43.0 |  |  |  |  | 2.4 | 1.8 |  |  |  |  | 0 | 0 |  |  |
Cash and cash equivalents at end of period | $ 281.7 | $ 317.8 | $ 281.7 | $ 317.8 |  |  | $ 5.0 | $ 5.0 | $ 5.0 | $ 5.0 |  |  | $ 275.7 | $ 311.9 | $ 275.7 | $ 311.9 |  |  | $ 1.0 | $ 0.9 | $ 1.0 | $ 0.9 |  |  | $ 0 | $ 0 | $ 0 | $ 0 |  |  |
[1] | The Company treats changes in long-term intercompany balances that relate to financing activities as cash flow from financing activities. In the above table, the Company has corrected the previous classification of the changes in such intercompany balances during six months ended June 30, 2012 from cash flows from operating activities to a separate line item in cash flows from financing activities captioned “intercompany loan”. Management has concluded that the correction of these errors is immaterial.

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- Definition Intercompany loan + References No definition available. + Details
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Namespace Prefix: | kalu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Intercompany payable, Current + References No definition available. + Details
Name: | kalu_IntercompanyPayableCurrent
Namespace Prefix: | kalu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Intercompany Payable, Noncurrent + References No definition available. + Details
Name: | kalu_IntercompanyPayableNoncurrent
Namespace Prefix: | kalu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Intercompany Receivables, Current + References No definition available. + Details
Name: | kalu_IntercompanyReceivablesCurrent
Namespace Prefix: | kalu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Intercompany Receivables, Noncurrent + References No definition available. + Details
Name: | kalu_IntercompanyReceivablesNoncurrent
Namespace Prefix: | kalu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Net Asset In Respect Of Union Vebas. + References No definition available. + Details
Name: | kalu_NetAssetInRespectOfVebas
Namespace Prefix: | kalu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Net liability in respect of VEBA + References No definition available. + Details
Name: | kalu_NetLiabilityInRespectOfVeba
Namespace Prefix: | kalu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Other operating income loss. + References No definition available. + Details
Name: | kalu_OtherOperatingIncomeLoss
Namespace Prefix: | kalu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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