Derivatives - BS Location (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	$ 75	$ 44
Fair Value of Derivative Instruments, Liabilities	72	106
Interest rate contracts
Location and Fair Value Amount of Derivative Instruments
Derivative Notional Amount	650
Derivatives designated as hedging instruments
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	56	31
Fair Value of Derivative Instruments, Liabilities	50	92
Derivatives designated as hedging instruments \| Foreign currency exchange contracts \| Other current assets
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	28	14
Derivatives designated as hedging instruments \| Foreign currency exchange contracts \| Other assets
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	21	10
Derivatives designated as hedging instruments \| Foreign currency exchange contracts \| Other current liabilities
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Liabilities	41	67
Derivatives designated as hedging instruments \| Foreign currency exchange contracts \| Other liabilities
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Liabilities	9	25
Derivatives designated as hedging instruments \| Foreign currency exchange contracts \| Current balance sheet location
Location and Fair Value Amount of Derivative Instruments
Derivative Notional Amount	1,715	1,630
Derivatives designated as hedging instruments \| Foreign currency exchange contracts \| Noncurrent balance sheet location
Location and Fair Value Amount of Derivative Instruments
Derivative Notional Amount	691	669
Derivatives designated as hedging instruments \| Interest rate contracts \| Other current assets
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	3	7
Derivatives designated as hedging instruments \| Interest rate contracts \| Other assets
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	4
Derivatives designated as hedging instruments \| Interest rate contracts \| Current balance sheet location
Location and Fair Value Amount of Derivative Instruments
Derivative Notional Amount	403	403
Derivatives designated as hedging instruments \| Interest rate contracts \| Noncurrent balance sheet location
Location and Fair Value Amount of Derivative Instruments
Derivative Notional Amount	650
Derivatives not designated as hedging instruments
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	19	13
Fair Value of Derivative Instruments, Liabilities	22	14
Derivatives not designated as hedging instruments \| Foreign currency exchange contracts \| Other current assets
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	19	13
Derivatives not designated as hedging instruments \| Foreign currency exchange contracts \| Other current liabilities
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Liabilities	22	14
Derivatives not designated as hedging instruments \| Foreign currency exchange contracts \| Current balance sheet location
Location and Fair Value Amount of Derivative Instruments
Derivative Notional Amount	$ 4,242	$ 3,166

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
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