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Goodwill Goodwill - Rollforward (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Feb. 27, 2015
Goodwill [Line Items]        
Historical Goodwill     $ 29,067  
Accumulated impairment losses     (4,413)  
Goodwill $ 22,152 $ 23,790 24,654  
Acquisitions(a)   321    
Impairment (1,644)      
Currency translation 6 (35)    
Loss on impairment of goodwill 0 (1,150) 0  
Natural Gas Pipelines Regulated        
Goodwill [Line Items]        
Historical Goodwill     17,527  
Accumulated impairment losses     (1,643)  
Goodwill 14,249 15,884 15,884  
Acquisitions(a)   0    
Impairment (1,635)      
Currency translation 0 0    
Loss on impairment of goodwill   0    
Natural Gas Pipelines Non-Regulated        
Goodwill [Line Items]        
Historical Goodwill     5,719  
Accumulated impairment losses     (447)  
Goodwill 4,215 4,215 5,272  
Acquisitions(a)   93    
Impairment 0      
Currency translation 0 0    
Loss on impairment of goodwill   (1,150)    
CO2        
Goodwill [Line Items]        
Historical Goodwill     1,528  
Accumulated impairment losses     0  
Goodwill 1,528 1,528 1,528  
Acquisitions(a)   0    
Impairment 0      
Currency translation 0 0    
Loss on impairment of goodwill   0    
Products Pipelines        
Goodwill [Line Items]        
Historical Goodwill     1,908  
Accumulated impairment losses     (1,197)  
Goodwill 928 928 711  
Acquisitions(a)   217    
Impairment 0      
Currency translation 0 0    
Loss on impairment of goodwill   0    
Products Pipelines Terminals        
Goodwill [Line Items]        
Historical Goodwill     221  
Accumulated impairment losses     (70)  
Goodwill 151 151 151  
Acquisitions(a)   0    
Impairment 0      
Currency translation 0 0    
Loss on impairment of goodwill   0    
Terminals        
Goodwill [Line Items]        
Historical Goodwill     1,573  
Accumulated impairment losses     (679)  
Goodwill 896 905 894  
Acquisitions(a)   11    
Impairment (9)      
Currency translation 0 0    
Loss on impairment of goodwill   0    
Kinder Morgan Canada        
Goodwill [Line Items]        
Historical Goodwill     591  
Accumulated impairment losses     (377)  
Goodwill 185 179 $ 214  
Acquisitions(a)   0    
Impairment 0      
Currency translation $ 6 (35)    
Loss on impairment of goodwill   0    
KMI Acquisition of Hiland Partners Holding LLC [Member] | Natural Gas Pipelines Non-Regulated        
Goodwill [Line Items]        
Acquisitions(a)   93    
KMI Acquisition of Hiland Partners Holding LLC [Member] | Products Pipelines        
Goodwill [Line Items]        
Acquisitions(a)   217    
Vopak Terminal Assets [Member]        
Goodwill [Line Items]        
Goodwill       $ 6
Vopak Terminal Assets [Member] | Terminals        
Goodwill [Line Items]        
Acquisitions(a)   $ 7    
Minimum [Member]        
Goodwill [Line Items]        
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount 9.00%      
Maximum [Member]        
Goodwill [Line Items]        
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount 80.00%