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All restrictions will lapse on March 5, 2021 or earlier upon the occurrence of certain specified circumstances."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 1,829 shares acquired pursuant to grants of restricted stock units."}],"balance_after":7165,"source":{"system":"sec-edgar","filing":"0001628280-18-002894","document":"wf-form4_152046591144084.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/811596/000162828018002894/wf-form4_152046591144084.xml","form_type":"4"}},{"id":4239443,"issuer":{"id":4302,"kind":"organization","name":"KAISER ALUMINUM CORP","symbol":"KALU"},"owners":[{"id":115886,"kind":"person","name":"Miller Del L","position":1,"cik":"0001704305","reported_name":"Miller Del L","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Vice President and Treasurer"}}],"security":"Common Stock, par value $0.01 per share","published_at":"2017-08-09T21:08:24.000Z","date":"2017-08-08","kind":"sale","acquired":false,"shares":817,"price":97.0723,"value":79308.0691,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents the sale of 817 shares in multiple transactions, ranging from $96.9410 to $97.1160 per share, resulting in a weighted average sale price of $97.0723 per share. The reporting person undertake to provide upon request by the SEC staff, the Registrant, or a security holder of the Registrant, full information regarding the number of shares sold at each separate price within the range."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 1,211 shares acquired pursuant to grants of restricted stock units."}],"balance_after":6547,"source":{"system":"sec-edgar","filing":"0001704305-17-000002","document":"wf-form4_150231288982043.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/811596/000170430517000002/wf-form4_150231288982043.xml","form_type":"4"}},{"id":4252254,"issuer":{"id":4302,"kind":"organization","name":"KAISER ALUMINUM CORP","symbol":"KALU"},"owners":[{"id":115886,"kind":"person","name":"Miller Del L","position":1,"cik":"0001704305","reported_name":"Miller Del L","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Vice President and Treasurer"}}],"security":"Common Stock, par value $0.01 per share","published_at":"2017-07-26T00:22:06.000Z","date":"2017-07-24","kind":"sale","acquired":false,"shares":1282,"price":96.81,"value":124110.42,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Includes 3,929 shares acquired pursuant to grants of restricted stock units."}],"balance_after":7364,"source":{"system":"sec-edgar","filing":"0001628280-17-007270","document":"wf-form4_150102851305440.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/811596/000162828017007270/wf-form4_150102851305440.xml","form_type":"4"}}]}