CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (624)	$ 528	$ (915)	$ 1,095
Other comprehensive income (loss), net of tax
Change in fair value of hedge derivatives (net of tax benefit (expense) of $57, $(19), $(12), and $45, respectively)	(189)	63	40	(152)
Reclassification of change in fair value of derivatives to net income (net of tax (expense) benefit of $(14), $6, $(23), and $2, respectively)	47	(18)	77	(5)
Foreign currency translation adjustments (net of tax expense of $—, $2, $—, and $7, respectively)	0	13	1	23
Benefit plan adjustments (net of tax expense of $2, $3, $5 and $5, respectively)	5	7	16	15
Total other comprehensive (loss) income	(137)	65	134	(119)
Comprehensive (loss) income	(761)	593	(781)	976
Comprehensive income attributable to noncontrolling interests	(13)	(15)	(28)	(20)
Comprehensive (loss) income attributable to Kinder Morgan, Inc.	$ (774)	$ 578	$ (809)	$ 956