Income Taxes - Change in Unrecognized Tax Benefits, Excluding Interest and Penalties (Detail) - USD ($) $ in Millions	12 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Income Tax Disclosure [Abstract]
Balance, beginning of period	$ 64	$ 86	$ 129
Additions for prior year tax positions	2	107	6
Additions for current year tax positions	3	5	4
Reduction for prior year tax positions	(4)	(9)	(40)
Lapse of the statute of limitations	(3)	(8)	(2)
Settlement-cash	0	(21)	(2)
Settlement-tax attributes	(2)	(94)	0
Impact of currency translations	2	(2)	(9)
Balance, end of period	$ 62	$ 64	$ 86

Unrecognized tax benefits decreases resulting from tax attributes.

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Unrecognized Tax Benefits, Increases (Decreases) Resulting From Foreign Currency Translation

+ References

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Amount of unrecognized tax benefits.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 10B
-URI http://asc.fasb.org/extlink&oid=84176650&loc=SL37586934-109318

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-Section 50
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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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-Name Accounting Standards Codification
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-Paragraph 15A
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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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- Definition

Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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