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Goodwill (Tables) | 6 Months Ended
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Jun. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of goodwill by segment and changes during the period | Goodwill by segment and changes in goodwill are reflected in the following table (in millions):
| Transportation |  | Facilities |  | Supply and Logistics |  | Total
Balance at December 31, 2019 | $ | 1,052 |  |  | $ | 982 |  |  | $ | 506 |  |  | $ | 2,540 |
Acquisitions | 2 |  |  | — |  |  | — |  |  | 2 |
Foreign currency translation adjustments | (11) |  |  | (4) |  |  | (3) |  |  | (18) |
Goodwill, gross | 1,043 |  |  | 978 |  |  | 503 |  |  | 2,524 |
Impairments | (1,038) |  |  | (975) |  |  | (502) |  |  | (2,515) |
Foreign currency translation adjustments | (5) |  |  | (3) |  |  | (1) |  |  | (9) |
Accumulated impairment losses | (1,043) |  |  | (978) |  |  | (503) |  |  | (2,524) |
Balance at June 30, 2020 | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13854-109267 + Details
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