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The DSUs become payable, in common stock, or at the Company's election, cash, at the earlier of the reporting person's separation from service or a change in control. DSUs earn dividend equivalents when dividends are declared on the Company's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F8","text":"The dividend equivalent rights accrued on previously awarded DSUs and were payable on May 9, 2019, the date of the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F8","text":"The dividend equivalent rights accrued on previously awarded DSUs and were payable on May 9, 2019, the date of the reporting person's separation from service."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":10162},"source":{"system":"sec-edgar","filing":"0001411207-19-000121","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1411207/000141120719000121/edgar.xml","form_type":"4"}},{"id":3531390,"issuer":{"id":246,"kind":"organization","name":"Allison Transmission Holdings Inc","symbol":"ALSN"},"owners":[{"id":157709,"kind":"person","name":"Harker William R","position":1,"cik":"0001349666","reported_name":"Harker William R","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Deferred Stock Units","published_at":"2019-05-10T20:19:19.000Z","date":"2019-05-08","kind":"grant","acquired":true,"shares":537,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F4","text":"These DSUs represent a quarterly payment of the portion of the reporting person's annual retainer and other fees under the Company's Fifth Amended and Restated Non-Employee Director Compensation Policy deferred pursuant to the Company's Amended and Restated Non-Employee Director Deferred Compensation Plan. 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The DSUs become payable, in common stock, or at the Company's election, cash, at the earlier of the reporting person's separation from service or a change in control. DSUs earn dividend equivalents when dividends are declared on the Company's common stock."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"Each DSU is the economic equivalent of one share of the Company's common stock. The DSUs become payable, in common stock, or at the Company's election, cash, at the earlier of the reporting person's separation from service or a change in control. 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Ashe Capital is a registered investment adviser and acts as an investment adviser to various private investment limited partnerships. The reporting person is a member of Ashe GP, LLC, which is Ashe Capital's general partner. 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The reporting person resigned from Allison Transmission Holdings, Inc.'s (the \"Company\") Board of Directors on May 9, 2019."},{"field":"shares","element":"transactionShares","label":"F2","text":"Includes 10,162 DSUs and 156 related dividend equivalents."}],"balance_after":10318,"source":{"system":"sec-edgar","filing":"0001411207-19-000121","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1411207/000141120719000121/edgar.xml","form_type":"4"}},{"id":3539694,"issuer":{"id":246,"kind":"organization","name":"Allison Transmission Holdings Inc","symbol":"ALSN"},"owners":[{"id":157709,"kind":"person","name":"Harker William R","position":1,"cik":"0001349666","reported_name":"Harker William R","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2019-05-04T01:48:38.000Z","date":"2019-05-01","kind":"sale","acquired":false,"shares":75000,"price":47.0801,"value":3531007.5,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $47.00 to $47.45, inclusive. The reporting person undertakes to provide Allison Transmission Holdings Inc, any security holder of Allison Transmission Holdings Inc 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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"These shares are beneficially owned by Ashe Capital Management, LP (\"Ashe Capital\"). Ashe Capital is a registered investment adviser and acts as an investment adviser to various private investment limited partnerships. The reporting person is a member of Ashe GP, LLC, which is Ashe Capital's general partner. 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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 vest proportionately with the DSUs 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 vest proportionately with the DSUs to which they relate.  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DSUs earn dividend equivalents when dividends are declared on the Company's common stock."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The number of DSUs received was calculated based on $47.07, which was the closing price of the Company's common stock on the date of grant."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Each DSU is the economic equivalent of one share of the Company's common stock. The DSUs become payable, in common stock, or at the Company's election, cash, at the earlier of the reporting person's separation from service or a change in control. DSUs earn dividend equivalents when dividends are declared on the Company's common stock."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Each DSU is the economic equivalent of one share of the Company's common stock. 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Ashe Capital is a registered investment adviser and acts as an investment adviser to various private investment limited partnerships. The reporting person is a member of Ashe GP, LLC, which is Ashe Capital's general partner. 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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 vest proportionately with the DSUs 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 vest proportionately with the DSUs to which they relate.  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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 vest proportionately with the DSUs 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 vest proportionately with the DSUs to which they relate.  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