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Goodwill (Tables)
 12 Months Ended
Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
Changes in the amounts of our goodwill for each of the years ended December 31, 2023 and 2022 are summarized by reporting unit as follows:  
 Natural Gas Pipelines RegulatedNatural Gas Pipelines Non-Regulated
CO2
Products PipelinesProducts Pipelines TerminalsTerminalsEnergy Transition VenturesTotal
(In millions)
Gross goodwill
$15,892 $4,940 $1,528 $2,575 $221 $1,481 $63 $26,700 
Accumulated impairment losses
(1,643)(2,597)(600)(1,197)(70)(679)— (6,786)
December 31, 202114,249 2,343 928 1,378 151 802 63 19,914 
Acquisitions(a)— — — — — — 51 51 
December 31, 202214,249 2,343 928 1,378 151 802 114 19,965 
Acquisition of STX Midstream— 156 — — — — — 156 
December 31, 202314,249 2,499 928 1,378 151 802 114 20,121 
Gross goodwill
15,892 5,096 1,528 2,575 221 1,481 114 26,907 
Accumulated impairment losses
(1,643)(2,597)(600)(1,197)(70)(679)— (6,786)
December 31, 2023$14,249 $2,499 $928 $1,378 $151 $802 $114 $20,121 
(a)Includes goodwill arising from our acquisition of NANR and a $10 million purchase price adjustment related to our acquisition of Kinetrex in 2021 that was attributed to long-term deferred tax liabilities.