Income Taxes - Additional Information (Detail) - USD ($)		12 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Income Tax Contingency [Line Items]
Income tax expense, net		$ 126,000,000	$ 355,000,000	$ 28,000,000
U.S. statutory federal tax rate	[1]	21.00%	28.00%	35.00%
Gross income tax paid		$ 144,000,000	$ 160,000,000	$ 132,000,000
Income tax refunds		18,000,000	7,000,000	9,000,000
Deferred tax asset		1,739,000,000	1,726,000,000
Unrecognized tax benefits		58,000,000	62,000,000	64,000,000	$ 86,000,000
Valuation allowance recorded		1,468,000,000	1,385,000,000
Interest and penalties		1,000,000	1,000,000	11,000,000
Interest and penalty accrual		3,000,000	3,000,000	3,000,000
Foreign tax authority settlement, net income tax expense (benefit)			49,000,000	63,000,000
Current foreign tax expense		118,000,000	107,000,000	118,000,000
Deferred foreign tax expense		(30,000,000)	(24,000,000)	(151,000,000)
Amount that affect effective income tax rate		37,000,000
Undistributed earnings of foreign subsidiaries, indefinitely reinvested		2,700,000,000
Maximum [Member]
Income Tax Contingency [Line Items]
Amount of uncertain tax liabilities		26,000,000
Minimum [Member]
Income Tax Contingency [Line Items]
Amount of uncertain tax liabilities		0
Settlement with Taxing Authority [Member]
Income Tax Contingency [Line Items]
Current foreign tax expense				20,000,000
Deferred foreign tax expense				43,000,000
Deferred Income Taxes [Member]
Income Tax Contingency [Line Items]
Foreign tax authority settlement, net income tax expense (benefit)			47,000,000
Current Income Tax Expense [Member]
Income Tax Contingency [Line Items]
Foreign tax authority settlement, net income tax expense (benefit)			2,000,000
Foreign Tax Authority [Member]
Income Tax Contingency [Line Items]
Capital loss carryforwards		$ 23,000,000
Capital loss carryforwards, expiration date		Jun. 30, 2025
Foreign Tax Authority [Member] | SEC Schedule, 12-09, Valuation Allowance, Operating Loss Carryforward [Member]
Income Tax Contingency [Line Items]
Change in valuation allowance tax benefit				$ 40,000,000
U.S. Federal [Member]
Income Tax Contingency [Line Items]
Capital loss carryforwards		$ 46,000,000
U.S. States [Member]
Income Tax Contingency [Line Items]
Capital loss carryforwards		$ 9,000,000
Capital loss carryforwards, expiration date		Jun. 30, 2018
State and Foreign Country Jurisdiction [Member]
Income Tax Contingency [Line Items]
Valuation allowance recorded		$ 45,000,000
Net Operating Loss Carryforwards [Member]
Income Tax Contingency [Line Items]
Deferred tax asset		397,000,000	348,000,000
Unrecognized tax benefits		44,000,000	45,000,000
Valuation allowance recorded		216,000,000	195,000,000
Capital Loss Carryforward [Member]
Income Tax Contingency [Line Items]
Deferred tax asset		923,000,000	889,000,000
Valuation allowance recorded		923,000,000	889,000,000
Capital Loss Carryforward [Member] | Australia [Member]
Income Tax Contingency [Line Items]
Capital loss carryforwards		2,200,000,000
Capital Loss Carryforward [Member] | U.K. [Member]
Income Tax Contingency [Line Items]
Capital loss carryforwards		1,600,000,000
Research Tax Credit Carryforward [Member] | U.S. Federal [Member]
Income Tax Contingency [Line Items]
Research and development credits		$ 21,000,000
Capital loss carryforwards, expiration date		Jun. 30, 2036
Foreign Tax Credits [Member]
Income Tax Contingency [Line Items]
Capital loss carryforwards, expiration date		Jun. 30, 2025
Foreign Tax Credits [Member] | U.S. Federal [Member]
Income Tax Contingency [Line Items]
Foreign tax credits		$ 24,000,000
Alternative Minimum Tax Credits [Member] | U.S. Federal [Member]
Income Tax Contingency [Line Items]
Alternative minimum tax credits		1,000,000
U.S. Tax Cuts and Jobs Act [Member]
Income Tax Contingency [Line Items]
Income tax expense, net		$ 237,000,000	$ 237,000,000

[1] As the Company has a June 30 fiscal year-end, the impact of the lower tax rate from the Tax Act was phased in resulting in a U.S. statutory federal tax rate of approximately 28% for the fiscal year ended June 30, 2018 and a 21% U.S. statutory federal tax rate for fiscal years thereafter.