v2.4.0.6
Document And Entity Information (USD $)
12 Months Ended
Dec. 31, 2011
Feb. 15, 2012
Jun. 30, 2011
Document Information [Line Items]      
Entity Registrant Name GENERAL MOTORS COMPANY    
Entity Central Index Key 0001467858    
Current Fiscal Year End Date --12-31    
Entity Filer Category Accelerated Filer    
Document Type 10-K    
Document Period End Date Dec. 31, 2011    
Document Fiscal Year Focus 2011    
Document Fiscal Period Focus Q4    
Amendment Flag false    
Entity Common Stock, Shares Outstanding   1,565,761,986  
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Public Float     $ 45,490,190,595