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Fair Value Measurements Narrative (Details) - Recurring - USD ($) $ in Millions	Sep. 30, 2020	Jun. 30, 2020
Assets:
Other investments	$ 111	$ 114
Liabilities:
Derivative Assets (Liabilities), at Fair Value, Net	24	53
Level 1
Assets:
Other investments	111	114
Cash and Cash Equivalents, Fair Value Disclosure	1,070	721
Liabilities:
Derivative Assets (Liabilities), at Fair Value, Net	0	0
Level 2
Assets:
Other investments	0	0
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Liabilities:
Derivative Assets (Liabilities), at Fair Value, Net	24	53
Level 3
Assets:
Other investments	0	0
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Liabilities:
Derivative Assets (Liabilities), at Fair Value, Net	0	0
Fair Value, Inputs, Level 1, 2 and 3
Assets:
Cash and Cash Equivalents, Fair Value Disclosure	$ 1,070	$ 721

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
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