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Investments in Affiliates Narrative (Details) $ / shares in Units, € in Millions, ₩ in Millions, ¥ in Millions, $ in Millions											3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 16, 2025 USD ($)	Jun. 16, 2025 EUR (€)	May 30, 2025 USD ($)	Apr. 29, 2025 USD ($)	Apr. 29, 2025 KRW (₩)	Feb. 27, 2025 USD ($)	Sep. 23, 2024 USD ($)	Sep. 23, 2024 CNY (¥)	May 16, 2024 USD ($)	May 02, 2024 USD ($)	Jun. 30, 2025 USD ($) $ / shares	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2024 USD ($) $ / shares	Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]
Equity Method Investments											$ 1,311		$ 1,311		$ 1,433
Net gain on equity method transactions	$ 13		$ 33						$ 550	$ 91	$ 46	$ 641	46	$ 641	$ 641
Gain (Loss) on Disposition of Stock in Subsidiary or Equity Method Investee, Per Diluted Share \| $ / shares											$ 0.15				$ 2.50
Proceeds from the sale of equity method investment													164	448
Fair Value, Nonrecurring [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Other-than-Temporary Impairment															$ 36
TTTech Auto AG
Schedule of Equity Method Investments [Line Items]
Equity Method Investments															147
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity															111
Motional AD LLC
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage			13.00%						15.00%	44.00%						50.00%
Equity Method Investments											$ 267		267		256
Capital Committed by Hyundai to Fund Motional			$ 440							$ 475
Proceeds from Sale of Equity Method Investments, Percentage Sold									0.11
Conversion of Stock, Percentage Converted									0.21
Proceeds from the sale of equity method investment									$ 448
Motional AD LLC \| Series B Preferred Stock
Schedule of Equity Method Investments [Line Items]
Equity Method Investments											$ 899		$ 899		$ 899
Motional AD LLC
Schedule of Equity Method Investments [Line Items]
Operating Lease, Weighted Average Remaining Lease Term											4 years		4 years
Lease Income											$ 1	$ 1	$ 1	$ 2
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 \| Stradvision
Schedule of Equity Method Investments [Line Items]
Payments to Acquire Debt Securities, Available-for-Sale				$ 29	₩ 42,000	$ 11							$ 108
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