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Goodwill (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Changes in goodwill |  |
Balance at beginning of period | $ 2,405 | $ 2,465
Acquisitions |  | 11
Foreign currency translation adjustments | 10 | (71)
Dispositions and reclassifications of assets held for sale | 71 |
Other |  | 0
Balance at end of period | 2,344 | 2,405
Operating Segments | Transportation |  |
Changes in goodwill |  |
Balance at beginning of period | 815 | 854
Acquisitions |  | 3
Foreign currency translation adjustments | 6 | (42)
Dispositions and reclassifications of assets held for sale | 15 |
Other |  | 0
Balance at end of period | 806 | 815
Operating Segments | Facilities |  |
Changes in goodwill |  |
Balance at beginning of period | 1,087 | 1,152
Acquisitions |  | 8
Foreign currency translation adjustments | 3 | (19)
Dispositions and reclassifications of assets held for sale | 56 |
Other |  | (54)
Balance at end of period | 1,034 | 1,087
Operating Segments | Supply and Logistics |  |
Changes in goodwill |  |
Balance at beginning of period | 503 | 459
Acquisitions |  | 0
Foreign currency translation adjustments | 1 | (10)
Other |  | 54
Balance at end of period | $ 504 | $ 503

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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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