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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Statement of Comprehensive Income [Abstract]      
Net income $ 180 $ 2,239 $ 1,919
Other comprehensive (loss) income, net of tax      
Change in fair value of hedge derivatives (net of tax (expense) benefit of $(75), $52, and $(34), respectively) 249 (177) 111
Reclassification of change in fair value of derivatives to net income (net of tax benefit (expense) of $78, $(2), and $(25), respectively) (255) 6 84
Foreign currency translation adjustments (net of tax expense of $—, $27, and $16, respectively) 0 108 141
Benefit plan adjustments (net of tax benefit (expense) of $19, $(23), and $(11), respectively) (68) 77 2
Total other comprehensive (loss) income (74) 14 338
Comprehensive income 106 2,253 2,257
Comprehensive income attributable to noncontrolling interests (61) (66) (328)
Comprehensive income attributable to KMI $ 45 $ 2,187 $ 1,929