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Goodwill Rollforward (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Goodwill [Line Items] |  |  |
Gross goodwill | $ 26,637 |  | $ 27,725
Accumulated impairment losses | (5,186) |  | (5,563)
Goodwill | 21,451 | $ 21,965 | 22,162
Currency translation |  | (8) |
Divestitures | (514) | (190) |
Transfer | 0 |  |
Other |  | 1 |
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
Currency translation |  | 0 |
Divestitures | 0 | 0 |
Transfer | 0 |  |
Other |  | 0 |
Natural Gas Pipelines Non-regulated |  |  |
Goodwill [Line Items] |  |  |
Gross goodwill | 4,940 |  | 5,812
Accumulated impairment losses | (1,597) |  | (1,597)
Goodwill | 3,343 | 4,215 | 4,215
Currency translation |  | 0 |
Divestitures | (422) | 0 |
Transfer | (450) |  |
Other |  | 0 |
CO2 |  |  |
Goodwill [Line Items] |  |  |
Gross goodwill | 1,528 |  | 1,528
Accumulated impairment losses | 0 |  | 0
Goodwill | 1,528 | 1,528 | 1,528
Currency translation |  | 0 |
Divestitures | 0 | 0 |
Transfer | 0 |  |
Other |  | 0 |
Products Pipelines |  |  |
Goodwill [Line Items] |  |  |
Gross goodwill | 2,575 |  | 2,125
Accumulated impairment losses | (1,197) |  | (1,197)
Goodwill | 1,378 | 928 | 928
Currency translation |  | 0 |
Divestitures | 0 | 0 |
Transfer | 450 |  |
Other |  | 0 |
Products Pipelines Terminals |  |  |
Goodwill [Line Items] |  |  |
Gross goodwill | 221 |  | 221
Accumulated impairment losses | (70) |  | (70)
Goodwill | 151 | 151 | 151
Currency translation |  | 0 |
Divestitures | 0 | 0 |
Transfer | 0 |  |
Other |  | 0 |
Terminals |  |  |
Goodwill [Line Items] |  |  |
Gross goodwill | 1,481 |  | 1,572
Accumulated impairment losses | (679) |  | (679)
Goodwill | 802 | 894 | 893
Currency translation |  | 0 |
Divestitures | (92) | 0 |
Transfer | 0 |  |
Other |  | 1 |
Kinder Morgan Canada |  |  |
Goodwill [Line Items] |  |  |
Gross goodwill | 0 |  | 575
Accumulated impairment losses | 0 |  | (377)
Goodwill | 0 | 0 | $ 198
Currency translation |  | (8) |
Divestitures | 0 | (190) |
Transfer | 0 |  |
Other |  | 0 |
Trans Mountain and Trans Mountain Expansion Project |  |  |
Goodwill [Line Items] |  |  |
Divestitures |  | $ (190) |
KML and U.S. Portion of Cochin Pipeline |  |  |
Goodwill [Line Items] |  |  |
Divestitures | $ (514) |  |

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