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Financial Instruments - Economic Hedges (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Loss related to interest rate swaps	$ 0	$ 0	$ 0	$ (103)	$ 0	$ (111)	$ 0	$ 0
Not Designated as Hedging Instrument, Economic Hedge
Derivative Instruments, Gain (Loss) [Line Items]
Loss related to interest rate swaps									$ (30)	$ 173	$ 234
Not Designated as Hedging Instrument, Economic Hedge | Currency exchange contracts | Intercompany loans and forecasted interest payments | Interest and other expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Loss related to interest rate swaps									(70)	100	98
Not Designated as Hedging Instrument, Economic Hedge | Currency exchange contracts | Forecasted transactions | Interest and other expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Loss related to interest rate swaps									(4)	(3)	(4)
Not Designated as Hedging Instrument, Economic Hedge | Currency exchange contracts | Forecasted transactions | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Loss related to interest rate swaps									41	17	103
Not Designated as Hedging Instrument, Economic Hedge | Currency exchange contracts | Forecasted transactions | Selling, general and administrative expenses
Derivative Instruments, Gain (Loss) [Line Items]
Loss related to interest rate swaps									(1)	(8)	(3)
Not Designated as Hedging Instrument, Economic Hedge | Commodity contracts | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Loss related to interest rate swaps									$ 4	$ 67	$ 40

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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