Financial Instruments - Narrative (Details) $ in Millions	Sep. 30, 2020 USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Four quarter rolling average of notional amount of foreign exchange contracts hedging foreign currency transactions	$ 2,900
Foreign currency cash flow hedge gain (loss) to be reclassified during next 12 months	$ 1

The estimated net amount of unrealized gains or losses on foreign currency cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=112277219&loc=d3e80748-113994

Name:	us-gaap_ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant