REVENUES - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Feb. 24, 2025	Nov. 30, 2024
Disaggregation of Revenue [Line Items]
Total contract liabilities	$ 1,840,000,000	$ 221,000,000
Revenues recognized from contract liability balances	0	$ 0
License | Volkswagen Group
Disaggregation of Revenue [Line Items]
Total contract liabilities	1,295,000,000			$ 1,295,000,000
Financial Milestone Payments | Volkswagen Group | Forecast
Disaggregation of Revenue [Line Items]
Total contract liabilities			$ 250,000,000
Start of Production Milestone Payments | Volkswagen Group | Forecast
Disaggregation of Revenue [Line Items]
Total contract liabilities			$ 210,000,000
Noncash Consideration | Volkswagen Group
Disaggregation of Revenue [Line Items]
Total contract liabilities	$ 201,000,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Disaggregation of Revenue [Line Items]
Remaining performance obligation, expected timing of satisfaction, period	4 years
Chase Bank | Revenue from Contract with Customer Benchmark | Customer Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk (as percent)	37.00%