CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 555	$ 595	$ 1,868	$ 1,932
Other comprehensive (loss) income, net of tax
Net unrealized (loss) gain from derivative instruments (net of taxes of $45, $(40), $(1) and $109, respectively)	(153)	123	2	(366)
Reclassification into earnings of net derivative instruments loss (gain) to net income (net of taxes of $(6), $(29), $9 and $(118), respectively)	22	104	(29)	396
Benefit plan adjustments (net of taxes of $(2), $(1), $(4) and $(6), respectively)	3	2	11	18
Total other comprehensive (loss) income	(128)	229	(16)	48
Comprehensive income	427	824	1,852	1,980
Comprehensive income attributable to noncontrolling interests	(23)	(19)	(71)	(54)
Comprehensive income attributable to KMI	$ 404	$ 805	$ 1,781	$ 1,926