Income Taxes - Schedule of Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions	Jun. 30, 2020	Jun. 30, 2019
Deferred tax assets:
Accrued liabilities	$ 100	$ 78
Capital loss carryforwards	886	923
Retirement benefit obligations	56	53
Net operating loss carryforwards	578	397
Business tax credits	93	78
Operating lease liabilities	302
Other	197	210
Total deferred tax assets	2,212	1,739
Deferred tax liabilities:
Asset basis difference and amortization	(269)	(266)
Operating lease right-of-use asset	(276)
Other	(47)	(31)
Total deferred tax liabilities	(592)	(297)
Net deferred tax asset before valuation allowance	1,620	1,442
Less: valuation allowance (See Note 23—Valuation and Qualifying Accounts)	(1,546)	(1,468)
Net deferred tax assets (liabilities)	$ 74
Net deferred tax assets (liabilities)		$ (26)