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CONSOLIDATED STATEMENTS OF CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Total period activity | $ 239 | $ 72 | $ (614)
Derivative Instruments |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning balance | (228) | (203) | (159)
Reclassification adjustments | 21 | 8 | (45)
Deferred gain/(loss) on cash flow hedges | (16) | (33) | 1
Total period activity | 5 | (25) | (44)
Ending balance | (223) | (228) | (203)
Translation Adjustments |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning balance | (782) | (878) | (308)
Currency translation adjustments | 234 | 96 | (570)
Total period activity | 234 | 96 | (570)
Ending balance | (548) | (782) | (878)
Other |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning balance | 1 | 0 | 0
Other |  | 1 |
Total period activity |  | 1 |
Ending balance | 1 | 1 | 0
Total |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning balance | (1,009) | (1,081) | (467)
Reclassification adjustments | 21 | 8 | (45)
Deferred gain/(loss) on cash flow hedges | (16) | (33) | 1
Currency translation adjustments | 234 | 96 | (570)
Other |  | 1 |
Total period activity | 239 | 72 | (614)
Ending balance | $ (770) | $ (1,009) | $ (1,081)

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- Definition Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -Subparagraph (b,c) -URI http://asc.fasb.org/extlink&oid=64808268&loc=d3e32211-110900 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669646-108580 + Details
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