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Goodwill Rollforward (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Goodwill [Line Items] |  |  |
Historical Goodwill |  |  | $ 27,715
Accumulated impairment losses |  |  | (5,563)
Goodwill | $ 21,965 | $ 22,162 | 22,152
Currency translation | (8) | 13 |
Divestitures(a) | (190) | (3) |
Other | 1 |  |
Natural Gas Pipelines Regulated |  |  |
Goodwill [Line Items] |  |  |
Historical Goodwill |  |  | 15,892
Accumulated impairment losses |  |  | (1,643)
Goodwill | 14,249 | 14,249 | 14,249
Currency translation | 0 | 0 |
Divestitures(a) | 0 | 0 |
Other | 0 |  |
Natural Gas Pipelines-Nonregulated |  |  |
Goodwill [Line Items] |  |  |
Historical Goodwill |  |  | 5,812
Accumulated impairment losses |  |  | (1,597)
Goodwill | 4,215 | 4,215 | 4,215
Currency translation | 0 | 0 |
Divestitures(a) | 0 | 0 |
Other | 0 |  |
CO2 |  |  |
Goodwill [Line Items] |  |  |
Historical Goodwill |  |  | 1,528
Accumulated impairment losses |  |  | 0
Goodwill | 1,528 | 1,528 | 1,528
Currency translation | 0 | 0 |
Divestitures(a) | 0 | 0 |
Other | 0 |  |
Products Pipelines |  |  |
Goodwill [Line Items] |  |  |
Historical Goodwill |  |  | 2,125
Accumulated impairment losses |  |  | (1,197)
Goodwill | 928 | 928 | 928
Currency translation | 0 | 0 |
Divestitures(a) | 0 | 0 |
Other | 0 |  |
Products Pipelines Terminals |  |  |
Goodwill [Line Items] |  |  |
Historical Goodwill |  |  | 221
Accumulated impairment losses |  |  | (70)
Goodwill | 151 | 151 | 151
Currency translation | 0 | 0 |
Divestitures(a) | 0 | 0 |
Other | 0 |  |
Terminals |  |  |
Goodwill [Line Items] |  |  |
Historical Goodwill |  |  | 1,575
Accumulated impairment losses |  |  | (679)
Goodwill | 894 | 893 | 896
Currency translation | 0 | 0 |
Divestitures(a) | 0 | (3) |
Other | 1 |  |
Kinder Morgan Canada |  |  |
Goodwill [Line Items] |  |  |
Historical Goodwill |  |  | 562
Accumulated impairment losses |  |  | (377)
Goodwill | 0 | 198 | $ 185
Currency translation | (8) | 13 |
Divestitures(a) | (190) | $ 0 |
Other | $ 0 |  |

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