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Goodwill | 6 Months Ended
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Jun. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill | Goodwill 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, 2016 | $ | 806 |  |  | $ | 1,034 |  |  | $ | 504 |  |  | $ | 2,344 |
Acquisitions (1) | 271 |  |  | — |  |  | — |  |  | 271 |
Foreign currency translation adjustments | 8 |  |  | 4 |  |  | 2 |  |  | 14 |
Dispositions and reclassifications to assets held for sale | — |  |  | (33 | ) |  | — |  |  | (33 | )
Balance at June 30, 2017 | $ | 1,085 |  |  | $ | 1,005 |  |  | $ | 506 |  |  | $ | 2,596 |
(1) | Goodwill is recorded at the acquisition date based on a preliminary fair value determination. This preliminary goodwill balance may be adjusted when the fair value determination is finalized.
We completed our goodwill impairment test as of June 30, 2017 using a qualitative assessment. We determined that it was more likely than not that the fair value of each reporting unit was greater than its respective book value; therefore, additional impairment testing was not necessary and goodwill was not considered impaired.

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- Definition The entire disclosure for goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=2144439 + Details
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