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Supplemental Cost Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Leases, Operating [Abstract]      
Rental expense under operating leases $ 1,321 $ 1,375 $ 1,285
Amounts payable over the next five years      
2015 698    
2016 600    
2017 501    
2018 422    
2019 375    
Consolidation, Eliminations [Member]      
Leases, Operating [Abstract]      
Rental expense under operating leases (149) (135) (142)
Amounts payable over the next five years      
2015 (73)    
2016 (44)    
2017 (28)    
2018 (20)    
2019 (18)    
Operating Segments [Member]      
Leases, Operating [Abstract]      
Rental expense under operating leases 1,470 1,510 1,427
Amounts payable over the next five years      
2015 771    
2016 644    
2017 529    
2018 442    
2019 393    
GE      
Leases, Operating [Abstract]      
Minimum rental commitments under noncancellable operating leases 2,870    
GE | Operating Segments [Member]      
Leases, Operating [Abstract]      
Rental expense under operating leases 1,186 1,220 1,134
Amounts payable over the next five years      
2015 634    
2016 528    
2017 432    
2018 371    
2019 337    
GECC      
Leases, Operating [Abstract]      
Minimum rental commitments under noncancellable operating leases 705    
GECC | Operating Segments [Member]      
Leases, Operating [Abstract]      
Rental expense under operating leases 284 $ 290 $ 293
Amounts payable over the next five years      
2015 137    
2016 116    
2017 97    
2018 71    
2019 $ 56