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STATEMENTS OF CONSOLIDATED STOCKHOLDERS' EQUITY - USD ($) $ in Millions | Total | Cumulative Effect, Period of Adoption, Adjustment | [1] | Cumulative Effect, Period of Adoption, Adjusted Balance | Common Stock | Common Stock Cumulative Effect, Period of Adoption, Adjusted Balance | Additional Paid In Capital | Additional Paid In Capital Cumulative Effect, Period of Adoption, Adjusted Balance | Retained Earnings | Retained Earnings Cumulative Effect, Period of Adoption, Adjustment | [1] | Retained Earnings Cumulative Effect, Period of Adoption, Adjusted Balance | Treasury Stock | Treasury Stock Cumulative Effect, Period of Adoption, Adjusted Balance | Accumulated Other Comprehensive Loss | Accumulated Other Comprehensive Loss Cumulative Effect, Period of Adoption, Adjustment | [1] | Accumulated Other Comprehensive Loss Cumulative Effect, Period of Adoption, Adjusted Balance
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2017 |  | $ 746.3 | $ 10.3 | $ 756.6 | $ 0.2 | $ 0.2 | $ 1,055.9 | $ 1,055.9 | $ 85.5 | $ 10.7 | $ 96.2 | $ (358.6) | $ (358.6) | $ (36.7) | $ (0.4) | $ (37.1)
Beginning balance (shares) at Dec. 31, 2017 |  |  |  |  | 16,773,586 | 16,773,586 |  |  |  |  |  |  |  |  |  |
Accounting Standards Update [Extensible List] |  | kalu:AccountingStandardsUpdate201409And201601Member |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ 91.7 |  |  |  |  |  |  | 91.7 |  |  |  |  |  |  |
Other comprehensive income (loss), net of tax |  | (11.7) |  |  |  |  |  |  |  |  |  |  |  | (11.7) |  |
Common shares issued (including impacts from Long-Term Incentive programs) |  | 0.2 |  |  |  |  | 0.2 |  |  |  |  |  |  |  |  |
Common shares issued (including impacts from Long-Term Incentive programs) (shares) |  |  |  |  | 146,363 |  |  |  |  |  |  |  |  |  |  |
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares |  | (6.9) |  |  |  |  | (6.9) |  |  |  |  |  |  |  |  |
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares (shares) |  |  |  |  | (68,195) |  |  |  |  |  |  |  |  |  |  |
Repurchase of common stock | [2] | (61.9) |  |  |  |  |  |  |  |  |  | (61.9) |  |  |  |
Repurchase of common stock (shares) | [2] |  |  |  | (617,151) |  |  |  |  |  |  |  |  |  |  |
Cash dividends declared | [3] | (37.7) |  |  |  |  |  |  | (37.7) |  |  |  |  |  |  |
Amortization of unearned equity compensation |  | 10.1 |  |  |  |  | 10.1 |  |  |  |  |  |  |  |  |
Ending balance at Dec. 31, 2018 |  | 740.4 |  |  | $ 0.2 |  | 1,059.3 |  | 150.2 |  |  | (420.5) |  | (48.8) |  |
Ending balance (shares) at Dec. 31, 2018 |  |  |  |  | 16,234,603 |  |  |  |  |  |  |  |  |  |  |
Net income |  | 62.0 |  |  |  |  |  |  | 62.0 |  |  |  |  |  |  |
Other comprehensive income (loss), net of tax |  | 10.2 |  |  |  |  |  |  |  |  |  |  |  | 10.2 |  |
Common shares issued (including impacts from Long-Term Incentive programs) |  | 0.3 |  |  |  |  | 0.3 |  |  |  |  |  |  |  |  |
Common shares issued (including impacts from Long-Term Incentive programs) (shares) |  |  |  |  | 137,905 |  |  |  |  |  |  |  |  |  |  |
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares |  | (6.2) |  |  |  |  | (6.2) |  |  |  |  |  |  |  |  |
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares (shares) |  |  |  |  | (58,783) |  |  |  |  |  |  |  |  |  |  |
Repurchase of common stock | [2] | (42.9) |  |  |  |  |  |  |  |  |  | (42.9) |  |  |  |
Repurchase of common stock (shares) | [2] |  |  |  | (445,421) |  |  |  |  |  |  |  |  |  |  |
Cash dividends declared | [3] | (39.4) |  |  |  |  |  |  | (39.4) |  |  |  |  |  |  |
Amortization of unearned equity compensation |  | 9.5 |  |  |  |  | 9.5 |  |  |  |  |  |  |  |  |
Ending balance at Dec. 31, 2019 |  | $ 733.9 |  |  | $ 0.2 |  | 1,062.9 |  | 172.8 |  |  | (463.4) |  | (38.6) |  |
Ending balance (shares) at Dec. 31, 2019 |  | 15,868,304 |  |  | 15,868,304 |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ 28.8 |  |  |  |  |  |  | 28.8 |  |  |  |  |  |  |
Other comprehensive income (loss), net of tax |  | 19.9 |  |  |  |  |  |  |  |  |  |  |  | 19.9 |  |
Common shares issued (including impacts from Long-Term Incentive programs) |  | 0.4 |  |  |  |  | 0.4 |  |  |  |  |  |  |  |  |
Common shares issued (including impacts from Long-Term Incentive programs) (shares) |  |  |  |  | 142,173 |  |  |  |  |  |  |  |  |  |  |
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares |  | (4.3) |  |  |  |  | (4.3) |  |  |  |  |  |  |  |  |
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares (shares) |  |  |  |  | (45,545) |  |  |  |  |  |  |  |  |  |  |
Repurchase of common stock | [2] | (12.5) |  |  |  |  |  |  |  |  |  | (12.5) |  |  |  |
Repurchase of common stock (shares) | [2] |  |  |  | (152,763) |  |  |  |  |  |  |  |  |  |  |
Cash dividends declared | [3] | (43.4) |  |  |  |  |  |  | (43.4) |  |  |  |  |  |  |
Amortization of unearned equity compensation |  | 9.6 |  |  |  |  | 9.6 |  |  |  |  |  |  |  |  |
Ending balance at Dec. 31, 2020 |  | $ 732.4 |  |  | $ 0.2 |  | $ 1,068.6 |  | $ 158.2 |  |  | $ (475.9) |  | $ (18.7) |  |
Ending balance (shares) at Dec. 31, 2020 |  | 15,812,169 |  |  | 15,812,169 |  |  |  |  |  |  |  |  |  |  |
[1] | Cumulative-effect adjustment relates to our adoption of Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers (Topic 606) and ASU No. 2016-01, Financial Instruments – Overall (Subtopic 825-10).
[2] | Weighted-average repurchase price (dollars per share) for the years ended December 31, 2020, December 31, 2019 and December 31, 2018 was $81.94, $96.18 and $100.28, respectively. At December 31, 2020, $93.1 million remained available to repurchase our common shares pursuant to the stock repurchase program.
[3] | Dividends declared per common share were $2.68, $2.40 and $2.20 during 2020, 2019 and 2018, respectively.

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