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Goodwill (Notes) | 12 Months Ended
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Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill Disclosure [Text Block] | Goodwill Changes in the amounts of our goodwill for each of the years ended December 31, 2019 and 2018 are summarized by reporting unit as follows (in millions):
| Natural Gas Pipelines Regulated |  | Natural Gas Pipelines Non-Regulated |  | CO 2 |  | Products Pipelines |  | Products Pipelines Terminals |  | Terminals |  | Kinder Morgan Canada |  | Total
Gross goodwill | $ | 15,892 |  |  | $ | 5,812 |  |  | $ | 1,528 |  |  | $ | 2,125 |  |  | $ | 221 |  |  | $ | 1,572 |  |  | $ | 575 |  |  | $ | 27,725 |
Accumulated impairment losses | (1,643 | ) |  | (1,597 | ) |  | — |  |  | (1,197 | ) |  | (70 | ) |  | (679 | ) |  | (377 | ) |  | (5,563 | )
December 31, 2017 | 14,249 |  |  | 4,215 |  |  | 1,528 |  |  | 928 |  |  | 151 |  |  | 893 |  |  | 198 |  |  | 22,162 |
Currency translation | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (8 | ) |  | (8 | )
Divestitures(a) | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (190 | ) |  | (190 | )
Other | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 1 |  |  | — |  |  | 1 |
December 31, 2018 | 14,249 |  |  | 4,215 |  |  | 1,528 |  |  | 928 |  |  | 151 |  |  | 894 |  |  | — |  |  | 21,965 |
Divestitures(b) | — |  |  | (422 | ) |  | — |  |  | — |  |  | — |  |  | (92 | ) |  | — |  |  | (514 | )
Transfer(c) | — |  |  | (450 | ) |  | — |  |  | 450 |  |  | — |  |  | — |  |  | — |  |  | — |
Gross goodwill | 15,892 |  |  | 4,940 |  |  | 1,528 |  |  | 2,575 |  |  | 221 |  |  | 1,481 |  |  | — |  |  | 26,637 |
Accumulated impairment losses | (1,643 | ) |  | (1,597 | ) |  | — |  |  | (1,197 | ) |  | (70 | ) |  | (679 | ) |  | — |  |  | (5,186 | )
December 31, 2019 | $ | 14,249 |  |  | $ | 3,343 |  |  | $ | 1,528 |  |  | $ | 1,378 |  |  | $ | 151 |  |  | $ | 802 |  |  | $ | — |  |  | $ | 21,451 |
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(a) | 2018 includes $190 million related to the TMPL Sale, including all of the accumulated impairment losses for our Kinder Morgan Canada reporting unit. See Note 3 for more information.
(b) 2019 includes $514 million related to the KML and U.S. Cochin Sale. See Note 3 for more information. (c) Effective January 1, 2019, for segment reporting purposes, certain assets were transferred among our business segments which resulted in the transfer of goodwill from the Natural Gas Pipelines Non-Regulated reporting unit to the Products Pipelines reporting unit. See Note 16 for more information. Refer to Note 2 “Summary of Significant Accounting Policies—Goodwill” for a description of our accounting for goodwill. As of May 31, 2019, the results of our annual Step 1 analysis did not indicate an impairment of goodwill. Each of our reporting units had an estimated fair value in excess of their respective carrying values (by at least 10%) and as such, step 2 was not required. We did not identify any triggers requiring further impairment analysis during the remainder of the year. We estimated fair value based primarily on a market approach utilizing forecasted earnings before interest, taxes, depreciation and amortization (EBITDA) and the enterprise value to estimated EBITDA multiples of comparable companies for each of our reporting units. The value of each reporting unit was determined from the perspective of a market participant representing the price estimated to be received in a sale of the reporting unit in an orderly transaction between market participants at the measurement date. For our Natural Gas Pipelines Non-Regulated reporting unit, our May 31, 2019 annual test also considered a discounted cash flow analysis (income approach) to evaluate the fair value of this reporting unit to provide an additional indication of fair value based on the present value of cash flows this reporting unit is expected to generate in the future. We weighted the market and income approaches to arrive at an estimated fair value of this reporting unit as we believed the income approach reflects the value a market participant would place on our growth projects that are not fully reflected under a market approach, which considers only near term forecasted EBITDA projections. However, as both approaches yielded a fair value estimate that exceeded the reporting unit’s carrying value, we do not consider the income approach or the relative weighting of these approaches to be significant assumptions in reaching our conclusion that goodwill is not impaired. The fair value estimates used in our Step 1 analysis are subject to variability in the forecasted EBITDA projections and in the enterprise value to estimated EBITDA multiples of comparable companies for each of our reporting units. A significant unfavorable change to any one or combination of these factors would result in a change to the reporting unit fair values discussed above and potentially result in future impairments of goodwill. Such non-cash impairments could have a significant effect on our results of operations.

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