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The reporting person did not stand for re-election at the Company's 2021 annual meeting of stockholders and his term ended on May 5, 2021.  Each DSU is the economic equivalent of one share of the Company's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Represents the DSUs payable upon the reporting person's separation from service. The reporting person did not stand for re-election at the Company's 2021 annual meeting of stockholders and his term ended on May 5, 2021.  Each DSU is the economic equivalent of one share of the Company's common stock."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"Represents the DSUs payable upon the reporting person's separation from service. The reporting person did not stand for re-election at the Company's 2021 annual meeting of stockholders and his term ended on May 5, 2021.  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Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The dividend equivalent rights accrued on previously awarded deferred stock units (\"DSUs\") and restricted stock units (\"RSUs\") and vest proportionately with the DSUs and RSUs to which they relate.  Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The dividend equivalent rights accrued on previously awarded deferred stock units (\"DSUs\") and restricted stock units (\"RSUs\") and vest proportionately with the DSUs and RSUs to which they relate.  Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock."}],"balance_after":185,"derivative":{"underlying":"Common Stock","underlying_shares":30},"source":{"system":"sec-edgar","filing":"0001411207-21-000062","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1411207/000141120721000062/edgar.xml","form_type":"4"}},{"id":2964093,"issuer":{"id":246,"kind":"organization","name":"Allison Transmission Holdings Inc","symbol":"ALSN"},"owners":[{"id":139620,"kind":"person","name":"Dewey Lawrence E.","position":1,"cik":"0001543489","reported_name":"Dewey Lawrence E.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Dividend Equivalent Rights","published_at":"2020-11-30T20:15:44.000Z","date":"2020-11-25","kind":"grant","acquired":true,"shares":26,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The dividend equivalent rights accrued on previously awarded deferred stock units (\"DSUs\") and restricted stock units (\"RSUs\") and vest proportionately with the DSUs and RSUs to which they relate.  Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The dividend equivalent rights accrued on previously awarded deferred stock units (\"DSUs\") and restricted stock units (\"RSUs\") and vest proportionately with the DSUs and RSUs to which they relate.  Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The dividend equivalent rights accrued on previously awarded deferred stock units (\"DSUs\") and restricted stock units (\"RSUs\") and vest proportionately with the DSUs and RSUs to which they relate.  Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock."}],"balance_after":155,"derivative":{"underlying":"Common Stock","underlying_shares":26},"source":{"system":"sec-edgar","filing":"0001411207-20-000188","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1411207/000141120720000188/edgar.xml","form_type":"4"}},{"id":2965989,"issuer":{"id":246,"kind":"organization","name":"Allison Transmission Holdings Inc","symbol":"ALSN"},"owners":[{"id":139620,"kind":"person","name":"Dewey Lawrence E.","position":1,"cik":"0001543489","reported_name":"Dewey Lawrence E.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-11-25T22:29:12.000Z","date":"2020-11-23","kind":"sale","acquired":false,"shares":23722,"price":41.2142,"value":977683.2524,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 plan."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported is a weighted average price. These shares were sold in multiple transactions at per share prices ranging from $41.175 to $41.27. The reporting person undertakes to provide the Company, any security holder of the Company or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."}],"balance_after":41373,"source":{"system":"sec-edgar","filing":"0001062993-20-005920","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1411207/000106299320005920/form4.xml","form_type":"4"}},{"id":2965988,"issuer":{"id":246,"kind":"organization","name":"Allison Transmission Holdings Inc","symbol":"ALSN"},"owners":[{"id":139620,"kind":"person","name":"Dewey Lawrence E.","position":1,"cik":"0001543489","reported_name":"Dewey Lawrence E.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-11-25T22:29:12.000Z","date":"2020-11-23","kind":"sale","acquired":false,"shares":186103,"price":40.8289,"value":7598380.7767,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 plan."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported is a weighted average price. These shares were sold in multiple transactions at per share prices ranging from $40.18 to $41.17. The reporting person undertakes to provide the Company, any security holder of the Company or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."}],"balance_after":65095,"source":{"system":"sec-edgar","filing":"0001062993-20-005920","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1411207/000106299320005920/form4.xml","form_type":"4"}},{"id":3040964,"issuer":{"id":246,"kind":"organization","name":"Allison Transmission Holdings Inc","symbol":"ALSN"},"owners":[{"id":139620,"kind":"person","name":"Dewey Lawrence E.","position":1,"cik":"0001543489","reported_name":"Dewey Lawrence E.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Dividend Equivalent Rights","published_at":"2020-09-02T18:30:24.000Z","date":"2020-08-31","kind":"grant","acquired":true,"shares":30,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The dividend equivalent rights accrued on previously awarded deferred stock units (\"DSUs\") and restricted stock units (\"RSUs\") and vest proportionately with the DSUs and RSUs to which they relate.  Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The dividend equivalent rights accrued on previously awarded deferred stock units (\"DSUs\") and restricted stock units (\"RSUs\") and vest proportionately with the DSUs and RSUs to which they relate.  Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The dividend equivalent rights accrued on previously awarded deferred stock units (\"DSUs\") and restricted stock units (\"RSUs\") and vest proportionately with the DSUs and RSUs to which they relate.  Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock."}],"balance_after":129,"derivative":{"underlying":"Common Stock","underlying_shares":30},"source":{"system":"sec-edgar","filing":"0001411207-20-000142","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1411207/000141120720000142/edgar.xml","form_type":"4"}},{"id":3126770,"issuer":{"id":246,"kind":"organization","name":"Allison Transmission Holdings Inc","symbol":"ALSN"},"owners":[{"id":139620,"kind":"person","name":"Dewey Lawrence E.","position":1,"cik":"0001543489","reported_name":"Dewey Lawrence E.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Dividend Equivalent Rights","published_at":"2020-06-02T18:40:35.000Z","date":"2020-05-29","kind":"grant","acquired":true,"shares":29,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The dividend equivalent rights accrued on previously awarded deferred stock units (\"DSUs\") and restricted stock units (\"RSUs\") and vest proportionately with the DSUs and RSUs to which they relate.  Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The dividend equivalent rights accrued on previously awarded deferred stock units (\"DSUs\") and restricted stock units (\"RSUs\") and vest proportionately with the DSUs and RSUs to which they relate.  Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The dividend equivalent rights accrued on previously awarded deferred stock units (\"DSUs\") and restricted stock units (\"RSUs\") and vest proportionately with the DSUs and RSUs to which they relate.  Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock."}],"balance_after":99,"derivative":{"underlying":"Common Stock","underlying_shares":29},"source":{"system":"sec-edgar","filing":"0001411207-20-000106","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1411207/000141120720000106/edgar.xml","form_type":"4"}},{"id":3156238,"issuer":{"id":246,"kind":"organization","name":"Allison Transmission Holdings Inc","symbol":"ALSN"},"owners":[{"id":139620,"kind":"person","name":"Dewey Lawrence E.","position":1,"cik":"0001543489","reported_name":"Dewey Lawrence E.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2020-05-08T19:18:02.000Z","date":"2020-05-07","kind":"grant","acquired":true,"shares":3600,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F7","text":"The RSUs respresent the reporting person's annual equity award under Allison Transmission Holdings, Inc. 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Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The dividend equivalent rights accrued on previously awarded deferred stock units (\"DSUs\") and restricted stock units (\"RSUs\") and vest proportionately with the DSUs and RSUs to which they relate.  Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The dividend equivalent rights accrued on previously awarded deferred stock units (\"DSUs\") and restricted stock units (\"RSUs\") and vest proportionately with the DSUs and RSUs to which they relate.  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