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Goodwill Goodwill (Tables) | 12 Months Ended
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Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill [Table Text Block] | Changes in the amounts of our goodwill for each of the years ended December 31, 2017 and 2016 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
Historical Goodwill | $ | 17,527 |  |  | $ | 5,812 |  |  | $ | 1,528 |  |  | $ | 2,125 |  |  | $ | 221 |  |  | $ | 1,584 |  |  | $ | 556 |  |  | $ | 29,353 |
Accumulated impairment losses | (1,643 | ) |  | (1,597 | ) |  | — |  |  | (1,197 | ) |  | (70 | ) |  | (679 | ) |  | (377 | ) |  | (5,563 | )
December 31, 2015 | 15,884 |  |  | 4,215 |  |  | 1,528 |  |  | 928 |  |  | 151 |  |  | 905 |  |  | 179 |  |  | 23,790 |
Currency translation | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 6 |  |  | 6 |
Divestitures(a) | (1,635 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | (9 | ) |  | — |  |  | (1,644 | )
December 31, 2016 | 14,249 |  |  | 4,215 |  |  | 1,528 |  |  | 928 |  |  | 151 |  |  | 896 |  |  | 185 |  |  | 22,152 |
Currency translation | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 13 |  |  | 13 |
Divestitures(b) | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (3 | ) |  | — |  |  | (3 | )
December 31, 2017 | $ | 14,249 |  |  | $ | 4,215 |  |  | $ | 1,528 |  |  | $ | 928 |  |  | $ | 151 |  |  | $ | 893 |  |  | $ | 198 |  |  | $ | 22,162 |
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(a) | 2016 includes $1,635 million related to the sale of a 50% interest in our SNG natural gas pipeline system by Natural Gas Pipelines Regulated to Southern Company and $9 million related to certain terminal divestitures.
(b) | 2017 includes $3 million related to certain terminal divestitures.

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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