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CONSOLIDATED STATEMENTS OF CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total period activity	$ 97	$ (260)	$ 239
Derivative Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(177)	(223)	(228)
Reclassification adjustments	9	8	21
Unrealized gain/(loss) on hedges	(91)	38	(16)
Total period activity	(82)	46	5
Ending balance	(259)	(177)	(223)
Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(853)	(548)	(782)
Currency translation adjustments	179	(305)	234
Total period activity	179	(305)	234
Ending balance	(674)	(853)	(548)
Other
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		1	1
Other		(1)
Total period activity		(1)
Ending balance			1
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(1,030)	(770)	(1,009)
Reclassification adjustments	9	8	21
Unrealized gain/(loss) on hedges	(91)	38	(16)
Currency translation adjustments	179	(305)	234
Other		(1)
Total period activity	97	(260)	239
Ending balance	$ (933)	$ (1,030)	$ (770)

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Amount, after tax and before reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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Amount, after tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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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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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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