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Impairments and Losses and Gains on Divestitures (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2020 | Jun. 30, 2018 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Impairment of Goodwill, Long-lived assets and equity investments [Line Items] |  |  |  |  |
Pre-tax losses (gains) on divestitures and impairments, net |  |  | $ 1,922 | $ (285) | $ 437
(Gain) Loss on Sale of Assets and Asset Impairment Charges |  |  | 1,932 | (942) | 167
Impairment of goodwill |  |  | 1,600 |  |
Impairments of long-lived and intangible assets |  |  | 376 |  |
Impairment losses on long-lived assets and equity investments |  |  |  | 1,014 |
Other |  |  |  |  |
Impairment of Goodwill, Long-lived assets and equity investments [Line Items] |  |  |  |  |
(Gains) losses on divestitures of long-lived assets |  |  | 0 | (1) | 0
KML and U.S. Portion of Cochin Pipeline System |  |  |  |  |
Impairment of Goodwill, Long-lived assets and equity investments [Line Items] |  |  |  |  |
(Gain) Loss on Sale of Assets and Asset Impairment Charges |  |  |  | (1,296) |
Trans Mountain and Trans Mountain Expansion Project |  |  |  |  |
Impairment of Goodwill, Long-lived assets and equity investments [Line Items] |  |  |  |  |
(Gain) Loss on Sale of Assets and Asset Impairment Charges |  |  |  |  | (595)
Natural Gas Pipelines |  |  |  |  |
Impairment of Goodwill, Long-lived assets and equity investments [Line Items] |  |  |  |  |
Impairment of goodwill |  |  | 1,000 | 0 | 0
Impairments of long-lived assets |  |  | 0 | 290 | 636
Impairments of long-lived and intangible assets |  | $ 600 |  | 290 |
(Gains) losses on divestitures of long-lived assets |  |  | (1) | (967) | (6)
Impairments of equity investments |  |  | 0 | 650 | 270
Impairments of inventory |  |  | 11 | 0 | 0
Natural Gas Pipelines | KML and U.S. Portion of Cochin Pipeline System |  |  |  |  |
Impairment of Goodwill, Long-lived assets and equity investments [Line Items] |  |  |  |  |
(Gains) losses on divestitures of long-lived assets |  |  |  | (957) |
Products Pipelines |  |  |  |  |
Impairment of Goodwill, Long-lived assets and equity investments [Line Items] |  |  |  |  |
Impairments of long-lived and intangible assets |  |  | 21 | 0 | 0
Terminals |  |  |  |  |
Impairment of Goodwill, Long-lived assets and equity investments [Line Items] |  |  |  |  |
Impairments of long-lived and intangible assets |  |  | 5 | 0 | 59
(Gains) losses on divestitures of long-lived assets |  |  | (54) | (335) | (6)
Gain on sale of equity investment interests |  |  | (10) | 0 | 0
Terminals | Kinder Morgan Canada Limited |  |  |  |  |
Impairment of Goodwill, Long-lived assets and equity investments [Line Items] |  |  |  |  |
(Gains) losses on divestitures of long-lived assets |  |  |  | (339) |
Terminals | Staten Island Terminal [Member] |  |  |  |  |
Impairment of Goodwill, Long-lived assets and equity investments [Line Items] |  |  |  |  |
(Gains) losses on divestitures of long-lived assets |  |  | (55) |  |
CO2 |  |  |  |  |
Impairment of Goodwill, Long-lived assets and equity investments [Line Items] |  |  |  |  |
Impairment of goodwill | $ 600 |  | 600 | 0 | 0
Impairments of long-lived assets | $ 350 |  | 350 | 74 | 79
(Gains) losses on divestitures of long-lived assets |  |  | 0 | 2 | 0
Kinder Morgan Canada |  |  |  |  |
Impairment of Goodwill, Long-lived assets and equity investments [Line Items] |  |  |  |  |
(Gains) losses on divestitures of long-lived assets |  |  |  |  | $ (595)
Kinder Morgan Canada | Trans Mountain and Trans Mountain Expansion Project |  |  |  |  |
Impairment of Goodwill, Long-lived assets and equity investments [Line Items] |  |  |  |  |
(Gains) losses on divestitures of long-lived assets |  |  | $ 0 | 2 |
Ruby |  |  |  |  |
Impairment of Goodwill, Long-lived assets and equity investments [Line Items] |  |  |  |  |
Impairments of equity investments |  |  |  | 650 |
Ruby | Natural Gas Pipelines |  |  |  |  |
Impairment of Goodwill, Long-lived assets and equity investments [Line Items] |  |  |  |  |
Impairments of equity investments |  |  |  | $ 650 |

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- Definition This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 35 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=121548190&loc=d3e32787-111569 + Details
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