v3.25.4
Debt - Secured Debt and Unsecured Debt (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Sep. 30, 2025
May 31, 2025
Mar. 31, 2025
Dec. 31, 2025
Ultium Cells Holdings LLC        
Schedule of Short-term and Long-term Debt [Line Items]        
Principal amount   $ 1,800    
Financing receivable term   5 years    
Unsecured Debt | GM Financial | Revolving Credit Facility        
Schedule of Short-term and Long-term Debt [Line Items]        
Weighted-average interest rate       7.08%
Unsecured Debt | GM Financial | Revolving Credit Facility | Maximum        
Schedule of Short-term and Long-term Debt [Line Items]        
Debt term       5 years
Unsecured Debt | Senior Notes        
Schedule of Short-term and Long-term Debt [Line Items]        
Amount of debt issued $ 2,000 $ 2,000    
Weighted-average interest rate   5.70%    
Repayments of debt $ 1,250      
Unsecured Debt | Senior Notes | GM Financial        
Schedule of Short-term and Long-term Debt [Line Items]        
Amount of debt issued       $ 10,600
Weighted-average interest rate       5.05%
Weighted-average interest rate on outstanding long-term debt       4.41%
Unsecured Debt | Ten Billion Dollar Revolving Credit Facility | Line of Credit        
Schedule of Short-term and Long-term Debt [Line Items]        
Debt term     5 years  
Aggregate borrowing capacity     $ 10,000  
Unsecured Debt | 4.1 Billion Dollar Revolving Credit Facility | Line of Credit        
Schedule of Short-term and Long-term Debt [Line Items]        
Debt term     3 years  
Aggregate borrowing capacity     $ 4,100  
Unsecured Debt | $2.0 Billion Dollar Revolving Credit Facility | Line of Credit | GM Financial        
Schedule of Short-term and Long-term Debt [Line Items]        
Debt term     364 days 364 days
Aggregate borrowing capacity     $ 2,000 $ 2,000
Secured Debt | Line of Credit | GM Financial | Revolving Credit Facility        
Schedule of Short-term and Long-term Debt [Line Items]        
Aggregate borrowing capacity       27,800
Secured Debt | Securitization notes payable | Notes Payable | GM Financial        
Schedule of Short-term and Long-term Debt [Line Items]        
Amount of debt issued       $ 19,600
Weighted-average interest rate       4.65%
Weighted-average interest rate on outstanding long-term debt       4.92%