v2.4.0.6
Reportable Segments (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Segment Reporting Information [Line Items]      
Gain (Loss) on Investments $ 141    
Loss on remeasurement of previously held equity interest of Kinderhawk to fair value (225) 0  
Revenues from external customers 3,060 1,857  
Intersegment revenues (1) 0  
Other revenues (a) 9 9  
Total segment depreciation, depletion and amortization 412 274  
Total segment amortization of excess cost of investments (9) (2)  
General and administrative expenses(c) (140) (129)  
Unallocable income tax expense (187) (88)  
(Loss) income from KMP’s FTC Natural Gas Pipelines disposal group (e) (2) (378)  
Net (loss) income 656 (73)  
Assets 68,308   68,185
Assets held for sale 32   298
Loss on sale and the remeasurement of KMP’s FTC Natural Gas Pipelines disposal group to fair value, net of tax   (428)  
Unallocable Interest Expense Net Of Interest Income 409 182  
Natural Gas Pipelines [Member]
      
Segment Reporting Information [Line Items]      
Revenues from external customers 1,755 [1] 794 [1]  
Intersegment revenues 1 0  
Segment earnings before DD&A 896 [1],[2] 227 [1],[2]  
Assets 46,422 [1]    
CO2 [Member]
      
Segment Reporting Information [Line Items]      
Revenues from external customers 429 417  
Segment earnings before DD&A 342 [2] 334 [2]  
Assets 4,174    
Products Pipelines [Member]
      
Segment Reporting Information [Line Items]      
Revenues from external customers 454 223  
Segment earnings before DD&A 185 [2] 174 [2]  
Assets 6,149    
Terminals [Member]
      
Segment Reporting Information [Line Items]      
Revenues from external customers 337 341  
Segment earnings before DD&A 186 [2] 186 [2]  
Assets 6,151    
Kinder Morgan Canada [Member]
      
Segment Reporting Information [Line Items]      
Revenues from external customers 72 73  
Segment earnings before DD&A 193 [2] 50 [2]  
Assets 1,688    
All Other Segments [Member]
      
Segment Reporting Information [Line Items]      
Revenues from external customers 4 0  
Segment earnings before DD&A 4 [2] 0 [2]  
Assets 565    
Operating Segments [Member]
      
Segment Reporting Information [Line Items]      
Revenues from external customers 3,052 1,848  
Segment earnings before DD&A 1,806 [2] 971 [2]  
Assets 65,149   65,033
Corporate [Member]
      
Segment Reporting Information [Line Items]      
Assets $ 3,127 [1],[3]    
NGPL [Member]
      
Segment Reporting Information [Line Items]      
Ownership interest 20.00%    
[1] See Note 2.
[2] Includes revenues, earnings from equity investments, allocable interest income, and other, net, less operating expenses, allocable income taxes, and other expense (income).
[3] Includes cash and cash equivalents, margin and restricted deposits, unallocable interest receivable, prepaid assets and deferred charges, risk management assets related to debt fair value adjustment and miscellaneous corporate assets (such as information technology and telecommunications equipment) not allocated to individual segments.