Note 15 - Other Income (Expense), Net (Details Textual) - USD ($) $ in Millions				3 Months Ended		9 Months Ended
	Jan. 30, 2026	Jan. 01, 2026	Jun. 06, 2025	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Restructuring Charges				$ 5	$ 4	$ 20	$ 17
Gain (Loss) on Disposition of Stock in Subsidiary or Equity Method Investee	$ (8)		$ (8)			(8)	$ 12
Allison Transmission Holdings, Inc. [Member] \| Discontinued Operations, Disposed of by Sale [Member]
Transition Services Agreement, Period (Month)		24 months
Electric Vehicle Programs [Member]
Restructuring Charges						$ 60

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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