v2.4.0.8
Financing Receivables and Allowance For Losses On Financing Receivables (Allowance for Losses on Financing Receivables ) (Details) (USD $)
In Millions, unless otherwise specified
 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total balance $ 5,288 $ 5,205 $ 4,985 $ 6,190
Provision charged 2,517 1,606    
Other (89) (100)    
Gross write-offs (2,909) (3,273)    
Recoveries 784 782    
Commercial Portfolio Segment [Member]
        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total balance 902 1,290 1,041 1,530
Provision charged 366 269    
Other (7) (69)    
Gross write-offs (604) (537)    
Recoveries 106 97    
Commercial Portfolio Segment [Member] | Americas CLL Financing Receivables [Member]
        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total balance 480 662 490 889
Provision charged 182 57    
Other (1) (30)    
Gross write-offs (249) (306)    
Recoveries 58 52    
Commercial Portfolio Segment [Member] | Europe CLL Financing Receivables [Member]
        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total balance 329 484 445 400
Provision charged 146 158    
Other 1 (15)    
Gross write-offs (304) (95)    
Recoveries 41 36    
Commercial Portfolio Segment [Member] | Asia CLL Financing Receivables [Member]
        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total balance 72 87 80 157
Provision charged 39 13    
Other (7) (3)    
Gross write-offs (47) (89)    
Recoveries 7 9    
Commercial Portfolio Segment [Member] | Other CLL Financing Receivables [Member]
        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total balance 0 1 6 4
Provision charged (3) 0    
Other 0 (1)    
Gross write-offs (3) (2)    
Recoveries 0 0    
Commercial Portfolio Segment [Member] | CLL Financing Receivables [Member]
        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total balance 881 1,234 1,021 1,450
Provision charged 364 228    
Other (7) (49)    
Gross write-offs (603) (492)    
Recoveries 106 97    
Commercial Portfolio Segment [Member] | Energy Financial Services Financing Receivables [Member]
        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total balance 8 12 9 26
Provision charged (1) 10    
Other 0 0    
Gross write-offs 0 (24)    
Recoveries 0 0    
Commercial Portfolio Segment [Member] | GECAS Financing Receivables [Member]
        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total balance 11 32 8 17
Provision charged 3 26    
Other 0 0    
Gross write-offs 0 (11)    
Recoveries 0 0    
Commercial Portfolio Segment [Member] | Other Financing Receivables [Member]
        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total balance 2 12 3 37
Provision charged 0 5    
Other 0 (20)    
Gross write-offs (1) (10)    
Recoveries 0 0    
Commercial Real Estate Portfolio Segment [Member]
        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total balance 235 787 320 1,089
Provision charged (19) 45    
Other (3) (15)    
Gross write-offs (65) (339)    
Recoveries 2 7    
Consumer Portfolio Segment [Member]
        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total balance 4,151 3,128 3,624 3,571
Provision charged 2,170 1,292    
Other (79) (16)    
Gross write-offs (2,240) (2,397)    
Recoveries 676 678    
Consumer Portfolio Segment [Member] | Non US residential mortgages [Member]
        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total balance 517 481 480 546
Provision charged 125 65    
Other (1) (2)    
Gross write-offs (113) (165)    
Recoveries 26 37    
Consumer Portfolio Segment [Member] | Non US installment and revolving credit [Member]
        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total balance 663 665 623 717
Provision charged 279 220    
Other (32) (8)    
Gross write-offs (498) (543)    
Recoveries 291 279    
Consumer Portfolio Segment [Member] | US installment and revolving credit [Member]
        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total balance 2,714 1,724 2,282 2,008
Provision charged 1,660 937    
Other (50) (5)    
Gross write-offs (1,464) (1,488)    
Recoveries 286 272    
Consumer Portfolio Segment [Member] | Non US auto [Member]
        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total balance 62 79 67 101
Provision charged 24 15    
Other (5) (9)    
Gross write-offs (62) (77)    
Recoveries 38 49    
Consumer Portfolio Segment [Member] | Consumer Other Financing Receivable [Member]
        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total balance 195 179 172 199
Provision charged 82 55    
Other 9 8    
Gross write-offs (103) (124)    
Recoveries $ 35 $ 41