Acquisitions	6 Months Ended
Jun. 30, 2025
Business Combinations [Abstract]
Acquisitions	NOTE T. ACQUISITIONS On June 11, 2025, the Company entered into a Stock Purchase Agreement (the “Purchase Agreement”) with Dana Incorporated (“Dana”) to acquire the off-highway business of Dana. Pursuant to the Purchase Agreement, the Company plans to acquire Dana's off-highway business for a purchase price of approximately $2,732 million, subject to certain adjustments, using a combination of cash on hand and debt. The closing of the transaction is not subject to a financing condition or to the approval of Dana’s or Allison’s stockholders and is projected to occur late in the fourth quarter of 2025, pending customary regulatory approvals. The Company will be required to pay Dana a termination fee of $120 million if the Purchase Agreement is terminated due to the failure of the transactions contemplated by the Purchase Agreement to be completed by a specified outside date as a result of the failure to obtain required approvals or clearances under, or as a result of an injunction or order relating to, competition and foreign investment laws. Also on June 11, 2025, in connection with the entry into the Purchase Agreement, the Company entered into a commitment letter (the “Commitment Letter”) with a group of lenders (the "Lenders"), pursuant to which the Lenders have committed to provide a 364-day senior unsecured bridge term loan facility (the “Bridge Facility”), in an aggregate principal amount of up to $2,000 million, subject to customary conditions, including the execution and delivery of definitive documentation with respect to the Bridge Facility in accordance with the terms set forth in the Commitment Letter. The proceeds of the Bridge Facility may be used to finance a portion of the purchase price under the Purchase Agreement and to pay costs, fees and expenses in connection with the Bridge Facility and the transactions contemplated thereby. The Company expects to replace the Bridge Facility prior to the closing of the transaction with permanent financing, which may include the issuance of debt securities.

Acquisitions

6 Months Ended

Jun. 30, 2025

NOTE T. ACQUISITIONS

On June 11, 2025, the Company entered into a Stock Purchase Agreement (the “Purchase Agreement”) with Dana Incorporated (“Dana”) to acquire the off-highway business of Dana. Pursuant to the Purchase Agreement, the Company plans to acquire Dana's off-highway business for a purchase price of approximately $2,732 million, subject to certain adjustments, using a combination of cash on hand and debt. The closing of the transaction is not subject to a financing condition or to the approval of Dana’s or Allison’s stockholders and is projected to occur late in the fourth quarter of 2025, pending customary regulatory approvals. The Company will be required to pay Dana a termination fee of $120 million if the Purchase Agreement is terminated due to the failure of the transactions contemplated by the Purchase Agreement to be completed by a specified outside date as a result of the failure to obtain required approvals or clearances under, or as a result of an injunction or order relating to, competition and foreign investment laws.

Also on June 11, 2025, in connection with the entry into the Purchase Agreement, the Company entered into a commitment letter (the “Commitment Letter”) with a group of lenders (the "Lenders"), pursuant to which the Lenders have committed to provide a 364-day senior unsecured bridge term loan facility (the “Bridge Facility”), in an aggregate principal amount of up to $2,000 million, subject to customary conditions, including the execution and

delivery of definitive documentation with respect to the Bridge Facility in accordance with the terms set forth in the Commitment Letter. The proceeds of the Bridge Facility may be used to finance a portion of the purchase price under the Purchase Agreement and to pay costs, fees and expenses in connection with the Bridge Facility and the transactions contemplated thereby. The Company expects to replace the Bridge Facility prior to the closing of the transaction with permanent financing, which may include the issuance of debt securities.