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Stockholders' Equity - Noncontrolling Interests (Details) $ / shares in Units, $ in Millions, $ in Millions								12 Months Ended
	Jan. 03, 2019 USD ($)	Jan. 03, 2019 CAD ($)	Dec. 15, 2017 USD ($) shares	Dec. 15, 2017 CAD ($) $ / shares shares	Aug. 15, 2017 USD ($) shares	Aug. 15, 2017 CAD ($) $ / shares shares	May 30, 2017 shares	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($) shares	Dec. 31, 2017 USD ($) shares	Dec. 16, 2019
Noncontrolling interests								$ 344	$ 853
Cash distributions paid in the period to the public								2,163	1,618	$ 1,120
Dividends, Preferred Stock, Cash									128	156
Payments to noncontrolling interests	$ 900	$ 1,200						879	0	0
Kinder Morgan Canada Limited
Cash distributions paid in the period to the public								17	38	13
Value of Restricted Shares Issued in Lieu of Cash Dividends									$ 14	$ 5
Common Stock Dividends, Shares \| shares									1,092,791	418,989
Dividends, Preferred Stock, Cash								22	$ 21	$ 3
Restricted Voting Shares \| Kinder Morgan Canada Limited
Share issued (in shares) \| shares							102,942,000
Total value of distributions paid in the period								17	52	$ 18
Series 1 Preferred Shares \| Kinder Morgan Canada Limited
Share issued (in shares) \| shares					12,000,000	12,000,000
Proceeds from Issuance of Preferred Stock and Preference Stock					$ 235	$ 300
Shares Issued, Price Per Share \| $ / shares						$ 25.00
Net Proceeds from issuance of Preferred Stock					$ 230	$ 293
Series 3 Preferred Shares \| Kinder Morgan Canada Limited
Share issued (in shares) \| shares			10,000,000	10,000,000
Proceeds from Issuance of Preferred Stock and Preference Stock			$ 195	$ 250
Shares Issued, Price Per Share \| $ / shares				$ 25.00
Net Proceeds from issuance of Preferred Stock			$ 189	$ 243
Kinder Morgan Canada Limited
Ownership percentage	70.00%	70.00%									70.00%
Noncontrolling interests								0	514
Ownership percentage by noncontrolling owners							30.00%
Others
Noncontrolling interests								$ 344	$ 339