PRESENTATION AND NATURE OF OPERATIONS (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended
	Jun. 30, 2025	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Mar. 31, 2024	Dec. 31, 2024
Debt Instrument [Line Items]
Capital stock issuance		$ (1)	$ 745	$ 2	$ 4	$ 1
Contract with customer, liability		2,335					$ 1,840
Volkswagen Group \| Financial Milestone Payments
Debt Instrument [Line Items]
Proceeds from milestone achievement	$ 1,000
Shares issued (in shares)	51,502,854
Shares issued, price per share (in dollars per share)	$ 14.56		$ 14.56
Contract with customer, liability	$ 250	$ 250	$ 250
Volkswagen Group \| Financial Milestone Payments \| Common Class A
Debt Instrument [Line Items]
Capital stock issuance	$ 750

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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+ Details

- Definition

Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

+ References + Details

Rivian Automotive, Inc. / DE 10-Q