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STATEMENTS OF CONSOLIDATED STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Millions | Total | Common Stock | Additional Paid in Capital | Retained Earnings | Treasury Stock | Accumulated Other Comprehensive Income (Loss)
--- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2019 |  | $ 733.9 | $ 0.2 |  | $ 1,062.9 | $ 172.8 | $ (463.4) | $ (38.6)
Beginning balance (shares) at Dec. 31, 2019 |  |  | 15,868,304 |  |  |  |  |
Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net (loss) income |  | 29.1 |  |  |  | 29.1 |  |
Other comprehensive income (loss), net of tax |  | (15.5) |  |  |  |  |  | (15.5)
Common shares issued (including impacts from Long-Term Incentive programs) (shares) |  |  | 119,598 |  |  |  |  |
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 | [1] | (12.5) |  |  |  |  | (12.5) |
Repurchase of common stock (shares) | [1] |  | (152,763) |  |  |  |  |
Cash dividends declared | [2] | (11.3) |  |  |  | (11.3) |  |
Amortization of unearned equity compensation |  | 1.7 |  |  | 1.7 |  |  |
Ending balance at Mar. 31, 2020 |  | 721.1 | $ 0.2 |  | 1,060.3 | 190.6 | (475.9) | (54.1)
Ending balance (shares) at Mar. 31, 2020 |  |  | 15,789,594 |  |  |  |  |
Beginning balance at Dec. 31, 2019 |  | 733.9 | $ 0.2 |  | 1,062.9 | 172.8 | (463.4) | (38.6)
Beginning balance (shares) at Dec. 31, 2019 |  |  | 15,868,304 |  |  |  |  |
Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net (loss) income |  | 22.9 |  |  |  |  |  |
Other comprehensive income (loss), net of tax |  | 4.6 |  |  |  |  |  |
Ending balance at Sep. 30, 2020 |  | 719.3 | $ 0.2 |  | 1,066.0 | 163.0 | (475.9) | (34.0)
Ending balance (shares) at Sep. 30, 2020 |  |  | 15,812,169 |  |  |  |  |
Beginning balance at Mar. 31, 2020 |  | 721.1 | $ 0.2 |  | 1,060.3 | 190.6 | (475.9) | (54.1)
Beginning balance (shares) at Mar. 31, 2020 |  |  | 15,789,594 |  |  |  |  |
Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net (loss) income |  | (6.6) |  |  |  | (6.6) |  |
Other comprehensive income (loss), net of tax |  | 11.9 |  |  |  |  |  | 11.9
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) |  |  | 22,575 |  |  |  |  |
Repurchase of common stock (shares) |  |  | 0 |  |  |  |  |
Cash dividends declared | [2] | (10.6) |  |  |  | (10.6) |  |
Amortization of unearned equity compensation |  | 2.6 |  |  | 2.6 |  |  |
Ending balance at Jun. 30, 2020 |  | 718.8 | $ 0.2 |  | 1,063.3 | 173.4 | (475.9) | (42.2)
Ending balance (shares) at Jun. 30, 2020 |  |  | 15,812,169 |  |  |  |  |
Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net (loss) income |  | 0.4 |  |  |  | 0.4 |  |
Other comprehensive income (loss), net of tax |  | 8.2 |  |  |  |  |  | 8.2
Repurchase of common stock (shares) |  |  | 0 |  |  |  |  |
Cash dividends declared | [2] | (10.8) |  |  |  | (10.8) |  |
Amortization of unearned equity compensation |  | 2.7 |  |  | 2.7 |  |  |
Ending balance at Sep. 30, 2020 |  | 719.3 | $ 0.2 |  | 1,066.0 | 163.0 | (475.9) | (34.0)
Ending balance (shares) at Sep. 30, 2020 |  |  | 15,812,169 |  |  |  |  |
Beginning balance at Dec. 31, 2020 |  | $ 732.4 | $ 0.2 |  | 1,068.6 | 158.2 | (475.9) | (18.7)
Beginning balance (shares) at Dec. 31, 2020 |  | 15,812,169 | 15,812,169 | [3],[4] |  |  |  |
Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net (loss) income |  | $ 4.5 |  |  |  | 4.5 |  |
Other comprehensive income (loss), net of tax |  | 9.1 |  |  |  |  |  | 9.1
Common shares issued (including impacts from Long-Term Incentive programs) (shares) | [3],[4] |  | 56,394 |  |  |  |  |
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares |  | (2.4) |  |  | (2.4) |  |  |
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares (shares) | [3],[4] |  | (20,625) |  |  |  |  |
Repurchase of common stock (shares) |  |  | 0 |  |  |  |  |
Cash dividends declared | [5] | (11.7) |  |  |  | (11.7) |  |
Amortization of unearned equity compensation |  | 3.1 |  |  | 3.1 |  |  |
Ending balance at Mar. 31, 2021 |  | 735.0 | $ 0.2 |  | 1,069.3 | 151.0 | (475.9) | (9.6)
Ending balance (shares) at Mar. 31, 2021 | [3],[4] |  | 15,847,938 |  |  |  |  |
Beginning balance at Dec. 31, 2020 |  | $ 732.4 | $ 0.2 |  | 1,068.6 | 158.2 | (475.9) | (18.7)
Beginning balance (shares) at Dec. 31, 2020 |  | 15,812,169 | 15,812,169 | [3],[4] |  |  |  |
Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net (loss) income |  | $ (20.2) |  |  |  |  |  |
Other comprehensive income (loss), net of tax |  | 35.8 |  |  |  |  |  |
Ending balance at Sep. 30, 2021 |  | $ 721.0 | $ 0.2 |  | 1,076.6 | 103.0 | (475.9) | 17.1
Ending balance (shares) at Sep. 30, 2021 |  | 15,862,672 | 15,862,672 | [3],[4] |  |  |  |
Beginning balance at Mar. 31, 2021 |  | $ 735.0 | $ 0.2 |  | 1,069.3 | 151.0 | (475.9) | (9.6)
Beginning balance (shares) at Mar. 31, 2021 | [3],[4] |  | 15,847,938 |  |  |  |  |
Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net (loss) income |  | (22.4) |  |  |  | (22.4) |  |
Other comprehensive income (loss), net of tax |  | 15.9 |  |  |  |  |  | 15.9
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) | [3],[4] |  | 12,291 |  |  |  |  |
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares (shares) | [3],[4] |  | (409) |  |  |  |  |
Repurchase of common stock (shares) |  |  | 0 |  |  |  |  |
Cash dividends declared | [5] | (11.7) |  |  |  | (11.7) |  |
Amortization of unearned equity compensation |  | 3.6 |  |  | 3.6 |  |  |
Ending balance at Jun. 30, 2021 |  | 720.7 | $ 0.2 |  | 1,073.2 | 116.9 | (475.9) | 6.3
Ending balance (shares) at Jun. 30, 2021 | [3],[4] |  | 15,859,820 |  |  |  |  |
Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net (loss) income |  | (2.3) |  |  |  | (2.3) |  |
Other comprehensive income (loss), net of tax |  | 10.8 |  |  |  |  |  | 10.8
Common shares issued (including impacts from Long-Term Incentive programs) (shares) | [3],[4] |  | 3,431 |  |  |  |  |
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares |  | (0.1) |  |  | (0.1) |  |  |
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares (shares) | [3],[4] |  | (579) |  |  |  |  |
Repurchase of common stock (shares) |  |  | 0 |  |  |  |  |
Cash dividends declared | [5] | (11.6) |  |  |  | (11.6) |  |
Amortization of unearned equity compensation |  | 3.5 |  |  | 3.5 |  |  |
Ending balance at Sep. 30, 2021 |  | $ 721.0 | $ 0.2 |  | $ 1,076.6 | $ 103.0 | $ (475.9) | $ 17.1
Ending balance (shares) at Sep. 30, 2021 |  | 15,862,672 | 15,862,672 | [3],[4] |  |  |  |
[1] | Weighted-average repurchase price (dollars per share) for the quarter ended March 31, 2020 was $81.94. There was no repurchase of common stock for the quarters ended June 30, 2020 and September 30, 2020.
[2] | Dividends declared per common share was $0.67 for each of the quarters ended March 31, 2020, June 30, 2020 and September 30, 2020.
[3] | At September 30, 2021, 710,580 shares were available for awards under the Kaiser Aluminum Corporation 2021 Equity and Incentive Compensation Plan (“2021 Plan”).
[4] | There were no repurchases of common stock during the quarters ended March 31, 2021, June 30, 2021 and September 30, 2021. At September 30, 2021, $93.1 million remained available to repurchase our common shares pursuant to the stock repurchase program.
[5] | Dividends declared per common share was $0.72 for the quarters ended March 31, 2021, June 30, 2021 and September 30, 2021.

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