STATEMENTS OF CONSOLIDATED STOCKHOLDERS' EQUITY (UNAUDITED) (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2020	Mar. 31, 2020		Sep. 30, 2019		Jun. 30, 2019		Mar. 31, 2019
Shares available for awards (shares)	309,181
Weighted average repurchase price (in dollars per share)		$ 81.94		$ 92.95		$ 95.00		$ 98.55
Repurchase amount remaining	$ 93.1
Cash dividends declared (in dollars per share)	$ 0.67	$ 0.67		$ 0.60		$ 0.60		$ 0.60
Common Stock
Repurchases of common stock	0	152,763	[1],[2]	128,615	[3]	108,177	[3]	175,977	[3]

[1] At September 30, 2020, 309,181 shares were available for awards under the Kaiser Aluminum Corporation 2016 Equity and Incentive Compensation Plan (“2016 Plan”).

[2] Weighted-average repurchase price (dollars per share) for the quarter ended March 31, 2020 was $81.94. There were no repurchases of common stock during the quarters ended June 30, 2020 and September 30, 2020. At September 30, 2020, $93.1 million remained available to repurchase our common shares pursuant to the stock repurchase program.

[3] Weighted-average repurchase price (dollars per share) for the quarters ended March 31, 2019, June 30, 2019 and September 30, 2019 was $98.55, $95.00 and $92.95, respectively.