Segment Information - Revenue and Long-Lived Assets by Geographic Region (Detail) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Total Revenues		$ 2,693	$ 2,093	$ 2,180	$ 2,058	$ 2,080	$ 1,978	$ 2,116	$ 1,965	$ 9,024	$ 8,139	$ 8,292
Total long-lived assets	[1]	3,391				2,066				3,391	2,066
U.S. and Canada [Member]
Segment Reporting Information [Line Items]
Total Revenues	[2]									3,998	3,880	3,920
Total long-lived assets	[1]	937				960				937	960
Europe [Member]
Segment Reporting Information [Line Items]
Total Revenues	[3]									1,766	1,671	1,873
Total long-lived assets	[1]	682				560				682	560
Australasia and Other [Member]
Segment Reporting Information [Line Items]
Total Revenues	[4]									3,260	2,588	$ 2,499
Total long-lived assets	[1]	$ 1,772				$ 546				$ 1,772	$ 546

[1] Reflects total assets less current assets, goodwill, intangible assets, investments and deferred income tax assets.

[2] Revenues include approximately $3.9 billion for fiscal 2018, $3.7 billion for fiscal 2017 and $3.8 billion for fiscal 2016 from customers in the U.S.

[3] Revenues include approximately $1.4 billion for fiscal 2018, $1.3 billion for fiscal 2017 and $1.5 billion for fiscal 2016 from customers in the U.K.

[4] Revenues include approximately $2.9 billion for fiscal 2018, $2.3 billion for fiscal 2017 and $2.3 billion for fiscal 2016 from customers in Australia.