Additional Financial Information - Components of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions		12 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of year		$ (874)	$ (964)	$ (1,026)
Fiscal year activity		(252)	90	62
Balance, end of year		(1,126)	(874)	(964)
Unrealized Holding Gains (Losses) on Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of year		22	(5)	20
Fiscal year activity	[1]	(22)	27	(25)
Balance, end of year		0	22	(5)
Cash Flow Hedge Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of year		4	0	0
Fiscal year activity	[2]	2	4	0
Balance, end of year		6	4	0
Benefit Plan Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of year		(309)	(437)	(445)
Fiscal year activity	[3]	(43)	128	8
Balance, end of year		(352)	(309)	(437)
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of year		(591)	(510)	(585)
Fiscal year activity	[4]	(189)	(81)	75
Balance, end of year		(780)	(591)	(510)
Share Of Other Comprehensive Income From Equity Affiliates Net [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of year		0	(12)	(16)
Fiscal year activity	[5]	0	12	4
Balance, end of year		$ 0	$ 0	$ (12)

[1] Net of income tax expense (benefit) of $1 million and ($10) million for the fiscal years ended June 30, 2018 and 2017, respectively. Upon adoption of ASU 2016-01, the Company recorded a $22 million decrease to Accumulated deficit to reclassify the cumulative net unrealized gains (losses) for these investments as of July 1, 2018.

[2] Net of income tax expense of $1 million, $2 million and nil for the fiscal years ended June 30, 2019, 2018 and 2017 respectively.

[3] Net of income tax (benefit) expense of ($10) million, $28 million and $8 million for the fiscal years ended June 30, 2019, 2018 and 2017, respectively.

[4] Excludes ($58) million, ($42) million and $9 million relating to noncontrolling interests for the fiscal years ended June 30, 2019, 2018 and 2017, respectively.

[5] Net of income tax expense of nil, $5 million, and $2 million for the fiscal years ended June 30, 2019, 2018 and 2017, respectively.