Reportable Segments Reportable Segments EBDA (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
DD&A	$ (532)	$ (579)	$ (1,097)	$ (1,172)
Amortization of excess cost of equity investments	(35)	(19)	(67)	(40)
General and administrative and corporate charges	(155)	(148)	(308)	(302)
Income Tax Expense	(104)	(148)	(164)	(320)
Net (Loss) Income	(624)	528	(915)	1,095
Operating Segments
Segment Reporting Information [Line Items]
Total Segment EBDA	599	1,881	1,566	3,855
Corporate and intersegment eliminations
Segment Reporting Information [Line Items]
DD&A	(532)	(579)	(1,097)	(1,172)
Amortization of excess cost of equity investments	(35)	(19)	(67)	(40)
General and administrative and corporate charges	(157)	(155)	(322)	(316)
Interest Income (Expense), Net	(395)	(452)	(831)	(912)
Income Tax Expense	(104)	(148)	(164)	(320)
Natural Gas Pipelines | Operating Segments
Segment Reporting Information [Line Items]
Total Segment EBDA	(3)	1,088	1,193	2,291
Products Pipelines | Operating Segments
Segment Reporting Information [Line Items]
Total Segment EBDA	227	307	496	583
Terminals | Operating Segments
Segment Reporting Information [Line Items]
Total Segment EBDA	229	290	486	589
CO2 | Operating Segments
Segment Reporting Information [Line Items]
Total Segment EBDA	146	196	(609)	394
Kinder Morgan Canada | Operating Segments
Segment Reporting Information [Line Items]
Total Segment EBDA	$ 0	$ 0	$ 0	$ (2)