Impairments Goodwill Impairments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Impairment of Goodwill, Long-lived assets and equity investments [Line Items]
Property, plant and equipment, net	$ 36,041		$ 36,419
Goodwill	20,851		$ 21,451
Loss (gain) on Sale of Assets and Asset Impairment Charges	(971)	$ 0
Pre-tax losses on divestitures and impairments, net	971	0
CO2
Impairment of Goodwill, Long-lived assets and equity investments [Line Items]
Goodwill impairment loss	$ 600	0
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount	10.00%
Products Pipelines
Impairment of Goodwill, Long-lived assets and equity investments [Line Items]
Loss (gain) on impairments of long-lived assets	$ 21	0
Kinder Morgan Canada | Trans Mountain and Trans Mountain Expansion Project [Member]
Impairment of Goodwill, Long-lived assets and equity investments [Line Items]
Loss (gain) on Sale of Assets and Asset Impairment Charges	0	2
CO2
Impairment of Goodwill, Long-lived assets and equity investments [Line Items]
Loss (gain) on impairments of long-lived assets	950
Other Segments
Impairment of Goodwill, Long-lived assets and equity investments [Line Items]
Loss (gain) on Sale of Assets and Asset Impairment Charges	0	(2)
Oil and Gas Properties | CO2
Impairment of Goodwill, Long-lived assets and equity investments [Line Items]
Loss (gain) on impairments of long-lived assets	$ 350	$ 0
Valuation Technique, Discounted Cash Flow [Member] | CO2
Impairment of Goodwill, Long-lived assets and equity investments [Line Items]
Estimated Weighted Average Cost Of Capital	9.25%
Valuation Technique, Discounted Cash Flow [Member] | Oil and Gas Properties | CO2
Impairment of Goodwill, Long-lived assets and equity investments [Line Items]
Estimated Weighted Average Cost Of Capital	10.50%