Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Income Tax Contingency [Line Items]
Deferred tax asset	$ 2,212,000,000	$ 1,739,000,000
Unrecognized tax benefits	63,000,000	58,000,000	$ 62,000,000	$ 64,000,000
Valuation allowance recorded	1,546,000,000	1,468,000,000
Interest and penalties	0	1,000,000	(1,000,000)
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
Amount that affect effective income tax rate	42,000,000
Undistributed earnings of foreign subsidiaries, indefinitely reinvested	2,300,000,000
Gross income tax paid	99,000,000	144,000,000	160,000,000
Income tax refunds	25,000,000	18,000,000	$ 7,000,000
Maximum
Income Tax Contingency [Line Items]
Amount of uncertain tax liabilities	31,000,000
Minimum
Income Tax Contingency [Line Items]
Amount of uncertain tax liabilities	0
Deferred Income Taxes
Income Tax Contingency [Line Items]
Foreign tax authority settlement, net income tax expense (benefit)		47,000,000
Current Income Tax Expense
Income Tax Contingency [Line Items]
Foreign tax authority settlement, net income tax expense (benefit)		2,000,000
Foreign Tax Authority
Income Tax Contingency [Line Items]
Capital loss carryforwards	16,000,000
U.S. Federal
Income Tax Contingency [Line Items]
Capital loss carryforwards	64,000,000
U.S. States
Income Tax Contingency [Line Items]
Capital loss carryforwards	13,000,000
State and Foreign Country Jurisdiction
Income Tax Contingency [Line Items]
Valuation allowance recorded	46,000,000
Net Operating Loss Carryforwards
Income Tax Contingency [Line Items]
Deferred tax asset	578,000,000	397,000,000
Unrecognized tax benefits	53,000,000	44,000,000
Valuation allowance recorded	269,000,000	216,000,000
Capital Loss Carryforward
Income Tax Contingency [Line Items]
Deferred tax asset	886,000,000	923,000,000
Valuation allowance recorded	886,000,000	$ 923,000,000
Capital Loss Carryforward | Australia
Income Tax Contingency [Line Items]
Capital loss carryforwards	2,100,000,000
Capital Loss Carryforward | U.K.
Income Tax Contingency [Line Items]
Capital loss carryforwards	1,500,000,000
Research Tax Credit Carryforward | U.S. Federal
Income Tax Contingency [Line Items]
Research and development credits	32,000,000
Foreign Tax Credits | U.S. Federal
Income Tax Contingency [Line Items]
Foreign tax credits	$ 32,000,000