CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Changes in Accumulated Other Comprehensive Income/(Loss)
Total period activity	$ (56)	$ 75	$ (121)	$ 111
Derivative Instruments
Changes in Accumulated Other Comprehensive Income/(Loss)
Balance at beginning of period			(223)	(228)
Reclassification adjustments			5	9
Unrealized gain (loss) on hedges			45	(12)
Total period activity			50	(3)
Balance at end of period	(173)	(231)	(173)	(231)
Translation Adjustments
Changes in Accumulated Other Comprehensive Income/(Loss)
Balance at beginning of period			(548)	(782)
Currency translation adjustments			(171)	114
Total period activity			(171)	114
Balance at end of period	(719)	(668)	(719)	(668)
Other
Changes in Accumulated Other Comprehensive Income/(Loss)
Balance at beginning of period			1	1
Balance at end of period	1	1	1	1
Total
Changes in Accumulated Other Comprehensive Income/(Loss)
Balance at beginning of period			(770)	(1,009)
Reclassification adjustments			5	9
Unrealized gain (loss) on hedges			45	(12)
Currency translation adjustments			(171)	114
Total period activity			(121)	111
Balance at end of period	$ (891)	$ (898)	$ (891)	$ (898)

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.

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