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v3.20.4

Goodwill (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Mar. 31, 2020 | Jun. 30, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Goodwill [Line Items] |  |  |  |  |
Gross goodwill |  |  | $ 26,637 |  | $ 27,151
Accumulated impairment losses |  |  | (6,786) |  | (5,186)
Goodwill |  |  | 19,851 | $ 21,451 | 21,965
Divestitures |  |  |  | (514) |
Transfer |  |  | 0 | 0 |
Impairments |  |  | (1,600) |  |
Natural Gas Pipelines Regulated |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Gross goodwill |  |  | 15,892 |  | 15,892
Accumulated impairment losses |  |  | (1,643) |  | (1,643)
Goodwill |  |  | 14,249 | 14,249 | 14,249
Divestitures |  |  |  | 0 |
Transfer |  |  | 0 | 0 |
Impairments |  |  | 0 |  |
Natural Gas Pipelines Non-regulated |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Gross goodwill |  |  | 4,940 |  | 5,812
Accumulated impairment losses |  |  | (2,597) |  | (1,597)
Goodwill |  |  | 2,343 | 3,343 | 4,215
Divestitures |  |  |  | (422) |
Transfer |  |  | 0 | (450) |
Impairments |  | $ (1,000) | (1,000) |  |
CO2 |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Gross goodwill |  |  | 1,528 |  | 1,528
Accumulated impairment losses |  |  | (600) |  | 0
Goodwill |  |  | 928 | 1,528 | 1,528
Divestitures |  |  |  | 0 |
Transfer |  |  | 0 | 0 |
Impairments | $ (600) |  | (600) |  |
Products Pipelines |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Gross goodwill |  |  | 2,575 |  | 2,125
Accumulated impairment losses |  |  | (1,197) |  | (1,197)
Goodwill |  |  | 1,378 | 1,378 | 928
Divestitures |  |  |  | 0 |
Transfer |  |  | 0 | 450 |
Impairments |  |  | 0 |  |
Products Pipelines Terminals |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Gross goodwill |  |  | 221 |  | 221
Accumulated impairment losses |  |  | (70) |  | (70)
Goodwill |  |  | 151 | 151 | 151
Divestitures |  |  |  | 0 |
Transfer |  |  | 0 | 0 |
Impairments |  |  | 0 |  |
Terminals |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Gross goodwill |  |  | 1,481 |  | 1,573
Accumulated impairment losses |  |  | (679) |  | (679)
Goodwill |  |  | 802 | 802 | $ 894
Divestitures |  |  |  | (92) |
Transfer |  |  | 0 | 0 |
Impairments |  |  | $ 0 |  |
KML and U.S. Portion of Cochin Pipeline System |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Divestitures |  |  |  | $ (514) |

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