CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 517	$ 1,005	$ 1,612	$ 1,417
Other comprehensive income (loss), net of tax
Change in fair value of hedge derivatives (net of tax (expense) benefit of $(6), $26, $39 and $39, respectively)	20	(87)	(132)	(133)
Reclassification of change in fair value of derivatives to net income (net of tax expense of $13, $4, $11 and $23, respectively)	40	11	35	78
Foreign currency translation adjustments (net of tax benefit (expense) of $2, $(49), $(5) and $(28), respectively)	(7)	300	16	187
Benefit plan adjustments (net of tax expense of $3, $21, $8 and $25, respectively)	8	37	23	49
Total other comprehensive income (loss)	61	261	(58)	181
Comprehensive income	578	1,266	1,554	1,598
Comprehensive income attributable to noncontrolling interests	(8)	(339)	(28)	(328)
Comprehensive income attributable to Kinder Morgan, Inc.	$ 570	$ 927	$ 1,526	$ 1,270