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Gain (Loss) on Disposition of Stock in Subsidiary or Equity Method Investee, Per Diluted Share

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Difference between amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and amount of underlying equity in net assets the reporting Entity has in the investee.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Amount of gain (loss) on sale or disposal of equity in securities of subsidiaries or equity method investee.

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Amount of cash outflow to acquire investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Investments in Affiliates Narrative (Details) $ / shares in Units, € in Millions, ¥ in Millions, $ in Millions						3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 16, 2025 USD ($)	Jun. 16, 2025 EUR (€)	May 30, 2025 USD ($)	Sep. 23, 2024 USD ($)	Sep. 23, 2024 CNY (¥)	Mar. 31, 2026 USD ($)	Jun. 30, 2025 USD ($)	Dec. 31, 2025 USD ($) $ / shares	Oct. 20, 2025 USD ($)	May 16, 2024
Schedule of Equity Method Investments [Line Items]
Equity Method Investments						$ 1,418		$ 1,431
Net gain on equity method transactions	$ 13							$ 33
Gain (Loss) on Disposition of Stock in Subsidiary or Equity Method Investee, Per Diluted Share \| $ / shares								$ 0.15
Available-for-sale debt securities						59		$ 58	$ 149
Motional AD LLC
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage			13.00%							15.00%
Equity Method Investments						234		246
Capital Committed by Hyundai to Fund Motional			$ 440
Motional AD LLC \| Series B Preferred Stock
Schedule of Equity Method Investments [Line Items]
Equity Method Investments						899		899
StradVision, Inc.
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage									41.00%
Equity Method Investments						142		143
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity						140		$ 137
Payments to Acquire Debt Securities, Available-for-Sale						$ 108	$ 40
United States of America, Dollars \| TTTech Auto AG
Schedule of Equity Method Investments [Line Items]
Proceeds from the sale of equity method investment \| €		€ 164
United States of America, Dollars \| Maxieye
Schedule of Equity Method Investments [Line Items]
Payments to Acquire Debt Securities, Available-for-Sale				$ 57
Chinese Yuan Renminbi \| Maxieye
Schedule of Equity Method Investments [Line Items]
Payments to Acquire Debt Securities, Available-for-Sale \| ¥					¥ 399