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Goodwill (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Changes in goodwill |  |
Balance at beginning of period | $ 2,521 | $ 2,566
Foreign currency translation adjustments | 19 | (32)
Divestitures |  | (13)
Balance at end of period | 2,540 | 2,521
Operating Segments | Transportation |  |
Changes in goodwill |  |
Balance at beginning of period | 1,040 | 1,070
Foreign currency translation adjustments | 12 | (19)
Divestitures |  | (11)
Balance at end of period | 1,052 | 1,040
Operating Segments | Facilities |  |
Changes in goodwill |  |
Balance at beginning of period | 978 | 988
Foreign currency translation adjustments | 4 | (8)
Divestitures |  | (2)
Balance at end of period | 982 | 978
Operating Segments | Supply And Logistics |  |
Changes in goodwill |  |
Balance at beginning of period | 503 | 508
Foreign currency translation adjustments | 3 | (5)
Balance at end of period | $ 506 | $ 503

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