Income Taxes - Schedule of Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions	Jun. 30, 2021	Jun. 30, 2020
Deferred tax assets:
Accrued liabilities	$ 169	$ 100
Capital loss carryforwards	1,126	886
Retirement benefit obligations	34	56
Net operating loss carryforwards	484	578
Business tax credits	115	93
Operating lease liabilities	365	302
Other	153	197
Total deferred tax assets	2,446	2,212
Deferred tax liabilities:
Asset basis difference and amortization	(161)	(269)
Operating lease right-of-use asset	(339)	(276)
Other	(63)	(47)
Total deferred tax liabilities	(563)	(592)
Net deferred tax asset before valuation allowance	1,883	1,620
Less: valuation allowance (See Note 22—Valuation and Qualifying Accounts)	(1,765)	(1,546)
Net deferred tax assets (liabilities)	$ 118	$ 74