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Stockholders' Equity - Noncontrolling Interests (Details) $ in Millions, $ in Billions			12 Months Ended
	Jan. 03, 2019 USD ($)	Jan. 03, 2019 CAD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($) shares
Cash distributions paid in the period to the public			$ 2,362	$ 2,163	$ 1,618
Dividends, Preferred Stock, Cash					128
Payments to noncontrolling interests	$ 900	$ 1.2	$ 0	879	0
Kinder Morgan Canada Limited
Cash distributions paid in the period to the public				17	38
Value of Restricted Shares Issued in Lieu of Cash Dividends					$ 14
Common Stock Dividends, Shares | shares					1,092,791
Dividends, Preferred Stock, Cash				22	$ 21
Restricted Voting Shares | Kinder Morgan Canada Limited
Total value of distributions paid in the period				$ 17	$ 52

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