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Derivative Instruments - Net Gains (Losses) from Changes in Fair Value (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Total (loss) gain recognized in income	$ (6)	$ 42	$ 13
Derivative instruments not designated as hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Total (loss) gain recognized in income	(58)	(22)	9
Derivative instruments not designated as hedges: | Foreign exchange contracts | Foreign exchange loss
Derivative Instruments, Gain (Loss) [Line Items]
Total (loss) gain recognized in income	(12)	(3)	1
Derivative instruments not designated as hedges: | Forward interest rate swaps | Interest expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Total (loss) gain recognized in income	$ (46)	$ (19)	$ 8

X

- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959

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+ References

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