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Goodwill (Tables) | 12 Months Ended
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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 Regulated |  | Natural Gas Pipelines Non-Regulated |  | CO 2 |  | Products Pipelines |  | Products Pipelines Terminals |  | Terminals |  | Energy Transition Ventures |  | Total |
| (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, 2021 | 14,249 |  |  | 2,343 |  |  | 928 |  |  | 1,378 |  |  | 151 |  |  | 802 |  |  | 63 |  |  | 19,914 |  |
Acquisitions(a) | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 51 |  |  | 51 |  |
December 31, 2022 | 14,249 |  |  | 2,343 |  |  | 928 |  |  | 1,378 |  |  | 151 |  |  | 802 |  |  | 114 |  |  | 19,965 |  |
Acquisition of STX Midstream | — |  |  | 156 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 156 |  |
December 31, 2023 | 14,249 |  |  | 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.

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