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Divestitures and Acquisition Sale of Interest in Canadian Business (Details)
$ / shares in Units, $ in Millions, $ in Millions
12 Months Ended
May 30, 2017
USD ($)
shares
May 30, 2017
CAD ($)
$ / shares
shares
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Contributions from noncontrolling interests - net proceeds from KML IPO     $ 0 $ 1,245 $ 0
Noncontrolling Interest, Increase from Sale of Parent Equity Interest       1,049  
Property, plant and equipment, net     37,897 40,155  
Other non-current assets     1,355 1,582  
Total Assets     78,866 79,055  
Current portion of debt     3,388 2,828  
Total other current liabilities     7,557 6,181  
Long-term debt     33,936 35,015  
Other long-term liabilities and deferred credits     2,176 2,735  
Total Liabilities     43,669 43,931  
Kinder Morgan Canada Limited Partnership [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Total current assets     3,204 270  
Property, plant and equipment, net     719 2,956  
Other non-current assets     8 322  
Total Assets     3,931 3,548  
Current portion of debt     0 0  
Total other current liabilities     2,353 236  
Long-term debt     0 0  
Other long-term liabilities and deferred credits     52 414  
Total Liabilities     $ 2,405 650  
Accumulated other comprehensive loss          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Noncontrolling Interest, Increase from Sale of Parent Equity Interest       51  
Non-controlling interests          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Noncontrolling Interest, Increase from Sale of Parent Equity Interest       684  
Kinder Morgan Canada Limited [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners   30.00%      
Kinder Morgan Canada Limited [Member] | KML Special Voting Shares [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Controlling Interest, Ownership Percentage by Parent   100.00%      
Kinder Morgan Canada Limited [Member] | KML Voting Shares [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Controlling Interest, Ownership Percentage by Parent   70.00%      
Sale of Equity Interest in Canadian Business [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Contributions from noncontrolling interests - net proceeds from KML IPO       1,245  
Adjustments to Additional Paid in Capital, Other       314  
Deferred Income Tax Adjustment due to IPO       166  
Sale of Equity Interest in Canadian Business [Member] | Restricted Voting Shares [Member] | Kinder Morgan Canada Limited [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Shares, Issued | shares 102,942,000 102,942,000      
Shares Issued, Price Per Share | $ / shares   $ 17.00      
Proceeds from Issuance Initial Public Offering $ 1,299 $ 1,750      
Sale of Equity Interest in Canadian Business [Member] | Accumulated other comprehensive loss | Kinder Morgan Canada Limited [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Disposal Group, Including Discontinued Operation, Foreign Currency Translation Gains (Losses)       (81)  
Sale of Equity Interest in Canadian Business [Member] | Non-controlling interests | Kinder Morgan Canada Limited [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Noncontrolling Interest, Increase from Sale of Parent Equity Interest       765  
Disposal Group, Including Discontinued Operation, Foreign Currency Translation Gains (Losses)       $ 81  
Sale of Equity Interest in Canadian Business [Member] | Kinder Morgan Canada Limited Partnership [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners   30.00%      
Controlling Interest Percentage Retained After Partial Sale 70.00% 70.00%