Condensed Consolidated Statement of Equity - USD ($) $ in Millions		Total	Cumulative adjustment related to adoption of ASC 842 and ASC 326		Ordinary Shares	Additional Paid-In Capital	Retained Earnings	Retained Earnings Cumulative adjustment related to adoption of ASC 842 and ASC 326		Accumulated Other Comprehensive Income (Loss)	Treasury Shares	Non-controlling Interest
Beginning Balance at Jun. 30, 2019		$ 5,675			$ 16	$ 6,008	$ 324			$ (722)	$ (16)	$ 65
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		68					66					2
Other comprehensive income (loss)		(51)								(51)
Share buyback/cancellations		(58)			0	(58)
Dividends declared		(196)					(196)
Distributions to Noncontrolling Interest												0
Options exercised and shares vested		0				(15)					15
Purchase of treasury shares		(10)									(10)
Share-based compensation expense		6				6
Ending Balance at Sep. 30, 2019		$ 5,492	$ 58		16	5,941	252	$ 58		(773)	(11)	67
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative adjustment related to adoption of ASC 842 and 326		us-gaap:AccountingStandardsUpdate201602Member
Beginning Balance at Jun. 30, 2020		$ 4,687			16	5,480	246			(1,049)	(67)	61
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		200					198					2
Other comprehensive income (loss)		30								30		0
Dividends declared		(188)					(181)
Distributions to Noncontrolling Interest												(7)
Options exercised and shares vested		5				(13)					18
Share-based compensation expense		14				14
Change in non-controlling interest		1										1
Ending Balance at Sep. 30, 2020		$ 4,744	$ (5)	[1]	$ 16	$ 5,481	$ 258	$ (5)	[1]	$ (1,019)	$ (49)	$ 57
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative adjustment related to adoption of ASC 842 and 326	[1]	us-gaap:AccountingStandardsUpdate201613Member

[1] Refer to Note 2, "New Accounting Guidance" for more information.